From 363f7e428dcf9f90d726481029f7b4a0ed6d55ce Mon Sep 17 00:00:00 2001
From: Marcin Juszkiewicz <openembedded@hrw.one.pl>
Date: Fri, 20 Jul 2007 01:11:53 +0200
Subject: PCMCIA: Add another MemoryCard to ide-cs/pata_pcmcia

One card submitted by user.

Signed-off-by: Marcin Juszkiewicz <openembedded@hrw.one.pl>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ata/pata_pcmcia.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index a56257c98fe..6da23feed03 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -382,6 +382,7 @@ static struct pcmcia_device_id pcmcia_devices[] = {
 	PCMCIA_DEVICE_PROD_ID12("HITACHI", "microdrive", 0xf4f43949, 0xa6d76178),
 	PCMCIA_DEVICE_PROD_ID12("IBM", "microdrive", 0xb569a6e5, 0xa6d76178),
 	PCMCIA_DEVICE_PROD_ID12("IBM", "IBM17JSSFP20", 0xb569a6e5, 0xf2508753),
+	PCMCIA_DEVICE_PROD_ID12("KINGSTON", "CF8GB", 0x2e6d1829, 0xacbe682e),
 	PCMCIA_DEVICE_PROD_ID12("IO DATA", "CBIDE2      ", 0x547e66dc, 0x8671043b),
 	PCMCIA_DEVICE_PROD_ID12("IO DATA", "PCIDE", 0x547e66dc, 0x5c5ab149),
 	PCMCIA_DEVICE_PROD_ID12("IO DATA", "PCIDEII", 0x547e66dc, 0xb3662674),
-- 
cgit v1.2.3-70-g09d2


From 6c1153e00af8de755ec278d873a97c9ce2a72d10 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 13 Jul 2007 15:20:15 -0400
Subject: [libata] sata_mv: Micro-optimization and cleanups

* Micro-optimization in the EDMA interrupt handling code
* s/EDMA_ERR_CRBQ_PAR/EDMA_ERR_CRQB_PAR/
* Document EDMA Error Interrupt Cause register bits

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_mv.c | 65 ++++++++++++++++++++++++---------------------------
 1 file changed, 31 insertions(+), 34 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index fb8a749423c..0ccd990c8da 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -227,26 +227,26 @@ enum {
 
 	EDMA_ERR_IRQ_CAUSE_OFS	= 0x8,
 	EDMA_ERR_IRQ_MASK_OFS	= 0xc,
-	EDMA_ERR_D_PAR		= (1 << 0),
-	EDMA_ERR_PRD_PAR	= (1 << 1),
-	EDMA_ERR_DEV		= (1 << 2),
-	EDMA_ERR_DEV_DCON	= (1 << 3),
-	EDMA_ERR_DEV_CON	= (1 << 4),
-	EDMA_ERR_SERR		= (1 << 5),
+	EDMA_ERR_D_PAR		= (1 << 0),	/* UDMA data parity err */
+	EDMA_ERR_PRD_PAR	= (1 << 1),	/* UDMA PRD parity err */
+	EDMA_ERR_DEV		= (1 << 2),	/* device error */
+	EDMA_ERR_DEV_DCON	= (1 << 3),	/* device disconnect */
+	EDMA_ERR_DEV_CON	= (1 << 4),	/* device connected */
+	EDMA_ERR_SERR		= (1 << 5),	/* SError bits [WBDST] raised */
 	EDMA_ERR_SELF_DIS	= (1 << 7),	/* Gen II/IIE self-disable */
 	EDMA_ERR_SELF_DIS_5	= (1 << 8),	/* Gen I self-disable */
-	EDMA_ERR_BIST_ASYNC	= (1 << 8),
+	EDMA_ERR_BIST_ASYNC	= (1 << 8),	/* BIST FIS or Async Notify */
 	EDMA_ERR_TRANS_IRQ_7	= (1 << 8),	/* Gen IIE transprt layer irq */
-	EDMA_ERR_CRBQ_PAR	= (1 << 9),
-	EDMA_ERR_CRPB_PAR	= (1 << 10),
-	EDMA_ERR_INTRL_PAR	= (1 << 11),
-	EDMA_ERR_IORDY		= (1 << 12),
-	EDMA_ERR_LNK_CTRL_RX	= (0xf << 13),
+	EDMA_ERR_CRQB_PAR	= (1 << 9),	/* CRQB parity error */
+	EDMA_ERR_CRPB_PAR	= (1 << 10),	/* CRPB parity error */
+	EDMA_ERR_INTRL_PAR	= (1 << 11),	/* internal parity error */
+	EDMA_ERR_IORDY		= (1 << 12),	/* IORdy timeout */
+	EDMA_ERR_LNK_CTRL_RX	= (0xf << 13),	/* link ctrl rx error */
 	EDMA_ERR_LNK_CTRL_RX_2	= (1 << 15),
-	EDMA_ERR_LNK_DATA_RX	= (0xf << 17),
-	EDMA_ERR_LNK_CTRL_TX	= (0x1f << 21),
-	EDMA_ERR_LNK_DATA_TX	= (0x1f << 26),
-	EDMA_ERR_TRANS_PROTO	= (1 << 31),
+	EDMA_ERR_LNK_DATA_RX	= (0xf << 17),	/* link data rx error */
+	EDMA_ERR_LNK_CTRL_TX	= (0x1f << 21),	/* link ctrl tx error */
+	EDMA_ERR_LNK_DATA_TX	= (0x1f << 26),	/* link data tx error */
+	EDMA_ERR_TRANS_PROTO	= (1 << 31),	/* transport protocol error */
 	EDMA_ERR_OVERRUN_5	= (1 << 5),
 	EDMA_ERR_UNDERRUN_5	= (1 << 6),
 	EDMA_EH_FREEZE		= EDMA_ERR_D_PAR |
@@ -255,7 +255,7 @@ enum {
 				  EDMA_ERR_DEV_CON |
 				  EDMA_ERR_SERR |
 				  EDMA_ERR_SELF_DIS |
-				  EDMA_ERR_CRBQ_PAR |
+				  EDMA_ERR_CRQB_PAR |
 				  EDMA_ERR_CRPB_PAR |
 				  EDMA_ERR_INTRL_PAR |
 				  EDMA_ERR_IORDY |
@@ -270,7 +270,7 @@ enum {
 				  EDMA_ERR_OVERRUN_5 |
 				  EDMA_ERR_UNDERRUN_5 |
 				  EDMA_ERR_SELF_DIS_5 |
-				  EDMA_ERR_CRBQ_PAR |
+				  EDMA_ERR_CRQB_PAR |
 				  EDMA_ERR_CRPB_PAR |
 				  EDMA_ERR_INTRL_PAR |
 				  EDMA_ERR_IORDY,
@@ -1393,7 +1393,7 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
 	if (edma_err_cause & EDMA_ERR_DEV)
 		err_mask |= AC_ERR_DEV;
 	if (edma_err_cause & (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
-			EDMA_ERR_CRBQ_PAR | EDMA_ERR_CRPB_PAR |
+			EDMA_ERR_CRQB_PAR | EDMA_ERR_CRPB_PAR |
 			EDMA_ERR_INTRL_PAR)) {
 		err_mask |= AC_ERR_ATA_BUS;
 		action |= ATA_EH_HARDRESET;
@@ -1489,33 +1489,30 @@ static void mv_intr_edma(struct ata_port *ap)
 
 	while (1) {
 		u16 status;
+		unsigned int tag;
 
 		/* get s/w response queue last-read pointer, and compare */
 		out_index = pp->resp_idx & MV_MAX_Q_DEPTH_MASK;
 		if (in_index == out_index)
 			break;
 
-		 
 		/* 50xx: get active ATA command */
 		if (IS_GEN_I(hpriv)) 
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			tag = ap->active_tag;
 
-		/* 60xx: get active ATA command via tag, to enable support
-		 * for queueing.  this works transparently for queued and
-		 * non-queued modes.
+		/* Gen II/IIE: get active ATA command via tag, to enable
+		 * support for queueing.  this works transparently for
+		 * queued and non-queued modes.
 		 */
-		else {
-			unsigned int tag;
+		else if (IS_GEN_II(hpriv))
+			tag = (le16_to_cpu(pp->crpb[out_index].id)
+				>> CRPB_IOID_SHIFT_6) & 0x3f;
 
-			if (IS_GEN_II(hpriv))
-				tag = (le16_to_cpu(pp->crpb[out_index].id)
-					>> CRPB_IOID_SHIFT_6) & 0x3f;
-			else
-				tag = (le16_to_cpu(pp->crpb[out_index].id)
-					>> CRPB_IOID_SHIFT_7) & 0x3f;
+		else /* IS_GEN_IIE */
+			tag = (le16_to_cpu(pp->crpb[out_index].id)
+				>> CRPB_IOID_SHIFT_7) & 0x3f;
 
-			qc = ata_qc_from_tag(ap, tag);
-		}
+		qc = ata_qc_from_tag(ap, tag);
 
 		/* lower 8 bits of status are EDMA_ERR_IRQ_CAUSE_OFS
 		 * bits (WARNING: might not necessarily be associated
-- 
cgit v1.2.3-70-g09d2


From 0ea9e179f436f153fc19fdaef7abbc1e0da20762 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 13 Jul 2007 17:06:45 -0400
Subject: [libata] sata_mv: minor cleanups

* trim trailing whitespace
* document some flags, registers, and register bits
* fix locking around EDMA on/off and configuration
* continue replacing "constant OP var" with "var OP constant"
* use new pci_try_set_mwi()

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_mv.c | 62 +++++++++++++++++++++++++++++++--------------------
 1 file changed, 38 insertions(+), 24 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 0ccd990c8da..80ade5b93b8 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -35,8 +35,6 @@
 
   6) Add port multiplier support (intermediate)
 
-  7) Test and verify 3.0 Gbps support
-
   8) Develop a low-power-consumption strategy, and implement it.
 
   9) [Experiment, low priority] See if ATAPI can be supported using
@@ -286,10 +284,10 @@ enum {
 	EDMA_RSP_Q_OUT_PTR_OFS	= 0x24,		/* also contains BASE_LO */
 	EDMA_RSP_Q_PTR_SHIFT	= 3,
 
-	EDMA_CMD_OFS		= 0x28,
-	EDMA_EN			= (1 << 0),
-	EDMA_DS			= (1 << 1),
-	ATA_RST			= (1 << 2),
+	EDMA_CMD_OFS		= 0x28,		/* EDMA command register */
+	EDMA_EN			= (1 << 0),	/* enable EDMA */
+	EDMA_DS			= (1 << 1),	/* disable EDMA; self-negated */
+	ATA_RST			= (1 << 2),	/* reset trans/link/phy */
 
 	EDMA_IORDY_TMOUT	= 0x34,
 	EDMA_ARB_CFG		= 0x38,
@@ -301,14 +299,13 @@ enum {
 	MV_HP_ERRATA_60X1B2	= (1 << 3),
 	MV_HP_ERRATA_60X1C0	= (1 << 4),
 	MV_HP_ERRATA_XX42A0	= (1 << 5),
-	MV_HP_GEN_I		= (1 << 6),
-	MV_HP_GEN_II		= (1 << 7),
-	MV_HP_GEN_IIE		= (1 << 8),
+	MV_HP_GEN_I		= (1 << 6),	/* Generation I: 50xx */
+	MV_HP_GEN_II		= (1 << 7),	/* Generation II: 60xx */
+	MV_HP_GEN_IIE		= (1 << 8),	/* Generation IIE: 6042/7042 */
 
 	/* Port private flags (pp_flags) */
-	MV_PP_FLAG_EDMA_EN	= (1 << 0),
-	MV_PP_FLAG_EDMA_DS_ACT	= (1 << 1),
-	MV_PP_FLAG_HAD_A_RESET	= (1 << 2),
+	MV_PP_FLAG_EDMA_EN	= (1 << 0),	/* is EDMA engine enabled? */
+	MV_PP_FLAG_HAD_A_RESET	= (1 << 2),	/* 1st hard reset complete? */
 };
 
 #define IS_GEN_I(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_I)
@@ -318,8 +315,12 @@ enum {
 enum {
 	MV_DMA_BOUNDARY		= 0xffffffffU,
 
+	/* mask of register bits containing lower 32 bits
+	 * of EDMA request queue DMA address
+	 */
 	EDMA_REQ_Q_BASE_LO_MASK	= 0xfffffc00U,
 
+	/* ditto, for response queue */
 	EDMA_RSP_Q_BASE_LO_MASK	= 0xffffff00U,
 };
 
@@ -823,7 +824,7 @@ static void mv_start_dma(void __iomem *base, struct mv_host_priv *hpriv,
 }
 
 /**
- *      mv_stop_dma - Disable eDMA engine
+ *      __mv_stop_dma - Disable eDMA engine
  *      @ap: ATA channel to manipulate
  *
  *      Verify the local cache of the eDMA state is accurate with a
@@ -832,7 +833,7 @@ static void mv_start_dma(void __iomem *base, struct mv_host_priv *hpriv,
  *      LOCKING:
  *      Inherited from caller.
  */
-static int mv_stop_dma(struct ata_port *ap)
+static int __mv_stop_dma(struct ata_port *ap)
 {
 	void __iomem *port_mmio = mv_ap_base(ap);
 	struct mv_port_priv *pp	= ap->private_data;
@@ -865,6 +866,18 @@ static int mv_stop_dma(struct ata_port *ap)
 	return err;
 }
 
+static int mv_stop_dma(struct ata_port *ap)
+{
+	unsigned long flags;
+	int rc;
+
+	spin_lock_irqsave(&ap->host->lock, flags);
+	rc = __mv_stop_dma(ap);
+	spin_unlock_irqrestore(&ap->host->lock, flags);
+
+	return rc;
+}
+
 #ifdef ATA_DEBUG
 static void mv_dump_mem(void __iomem *start, unsigned bytes)
 {
@@ -965,7 +978,7 @@ static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
 {
 	unsigned int ofs = mv_scr_offset(sc_reg_in);
 
-	if (0xffffffffU != ofs)
+	if (ofs != 0xffffffffU)
 		return readl(mv_ap_base(ap) + ofs);
 	else
 		return (u32) ofs;
@@ -975,7 +988,7 @@ static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
 {
 	unsigned int ofs = mv_scr_offset(sc_reg_in);
 
-	if (0xffffffffU != ofs)
+	if (ofs != 0xffffffffU)
 		writelfl(val, mv_ap_base(ap) + ofs);
 }
 
@@ -1029,6 +1042,7 @@ static int mv_port_start(struct ata_port *ap)
 	void __iomem *port_mmio = mv_ap_base(ap);
 	void *mem;
 	dma_addr_t mem_dma;
+	unsigned long flags;
 	int rc;
 
 	pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
@@ -1067,10 +1081,14 @@ static int mv_port_start(struct ata_port *ap)
 	pp->sg_tbl = mem;
 	pp->sg_tbl_dma = mem_dma;
 
+	spin_lock_irqsave(&ap->host->lock, flags);
+
 	mv_edma_cfg(ap, hpriv, port_mmio);
 
 	mv_set_edma_ptrs(port_mmio, hpriv, pp);
 
+	spin_unlock_irqrestore(&ap->host->lock, flags);
+
 	/* Don't turn on EDMA here...do it before DMA commands only.  Else
 	 * we'll be unable to send non-data, PIO, etc due to restricted access
 	 * to shadow regs.
@@ -1090,11 +1108,7 @@ static int mv_port_start(struct ata_port *ap)
  */
 static void mv_port_stop(struct ata_port *ap)
 {
-	unsigned long flags;
-
-	spin_lock_irqsave(&ap->host->lock, flags);
 	mv_stop_dma(ap);
-	spin_unlock_irqrestore(&ap->host->lock, flags);
 }
 
 /**
@@ -1325,7 +1339,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
 		 * port.  Turn off EDMA so there won't be problems accessing
 		 * shadow block, etc registers.
 		 */
-		mv_stop_dma(ap);
+		__mv_stop_dma(ap);
 		return ata_qc_issue_prot(qc);
 	}
 
@@ -1497,7 +1511,7 @@ static void mv_intr_edma(struct ata_port *ap)
 			break;
 
 		/* 50xx: get active ATA command */
-		if (IS_GEN_I(hpriv)) 
+		if (IS_GEN_I(hpriv))
 			tag = ap->active_tag;
 
 		/* Gen II/IIE: get active ATA command via tag, to enable
@@ -1532,7 +1546,7 @@ static void mv_intr_edma(struct ata_port *ap)
 			ata_qc_complete(qc);
 		}
 
-		/* advance software response queue pointer, to 
+		/* advance software response queue pointer, to
 		 * indicate (after the loop completes) to hardware
 		 * that we have consumed a response queue entry.
 		 */
@@ -2206,7 +2220,7 @@ static int mv_prereset(struct ata_port *ap, unsigned long deadline)
 	struct mv_port_priv *pp	= ap->private_data;
 	struct ata_eh_context *ehc = &ap->eh_context;
 	int rc;
-	
+
 	rc = mv_stop_dma(ap);
 	if (rc)
 		ehc->i.action |= ATA_EH_HARDRESET;
-- 
cgit v1.2.3-70-g09d2


From 83b6839ec33becca78ebf6035489733a62e750bb Mon Sep 17 00:00:00 2001
From: Magnus Damm <magnus.damm@gmail.com>
Date: Fri, 20 Jul 2007 12:50:58 +0900
Subject: pata_platform: Fix NULL pointer dereference

pata_platform: Fix NULL pointer dereference

pata_platform currently dereferences a NULL pointer in pata_platform_probe()
if pdev->dev.platform_data is set to NULL. This breakage was most likely
introduced by commit 5f45bc50976ee1f408f7171af155aec646655a37.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_platform.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index 79f841bca59..a909f793ffc 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -213,8 +213,9 @@ static int __devinit pata_platform_probe(struct platform_device *pdev)
 	pata_platform_setup_port(&ap->ioaddr, pp_info);
 
 	/* activate */
-	return ata_host_activate(host, platform_get_irq(pdev, 0), ata_interrupt,
-				 pp_info->irq_flags, &pata_platform_sht);
+	return ata_host_activate(host, platform_get_irq(pdev, 0),
+				 ata_interrupt, pp_info ? pp_info->irq_flags
+				 : 0, &pata_platform_sht);
 }
 
 /**
-- 
cgit v1.2.3-70-g09d2


From 3fb6589ceaf06d9c65bdf2382249d818771e913b Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 20 Jul 2007 12:49:38 +0900
Subject: libata: add ST9160821AS 3.CLF to NONCQ blacklist

Yay, the first one from Seagate.  3.ALC firmware is okay.  This was
reported by Sam Freed on bugzilla bug 8759.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Sam Freed <sam@freed.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 88e2dd0983b..e2ecb7a4628 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3769,6 +3769,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, },
 	{ "WDC WD740ADFD-00NLR1", NULL,		ATA_HORKAGE_NONCQ, },
 	{ "FUJITSU MHV2080BH",	"00840028",	ATA_HORKAGE_NONCQ, },
+	{ "ST9160821AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
 
 	/* Devices with NCQ limits */
 
-- 
cgit v1.2.3-70-g09d2


From 028a2596336b19a7e3713cfa9fe04d0d32e95876 Mon Sep 17 00:00:00 2001
From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Tue, 17 Jul 2007 23:48:48 +0400
Subject: ahci.c: fix CONFIG_PM=n compilation

Commit df69c9c5438b4e396a64d42608b2a6c48a3e7475 moved only prototype of
out of CONFIG_PM. Move function out as well. Box seems to boot fine.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 11e4eb9f304..eaec5e506f5 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1519,6 +1519,14 @@ static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
 	}
 }
 
+static int ahci_port_resume(struct ata_port *ap)
+{
+	ahci_power_up(ap);
+	ahci_start_port(ap);
+
+	return 0;
+}
+
 #ifdef CONFIG_PM
 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
 {
@@ -1536,14 +1544,6 @@ static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
 	return rc;
 }
 
-static int ahci_port_resume(struct ata_port *ap)
-{
-	ahci_power_up(ap);
-	ahci_start_port(ap);
-
-	return 0;
-}
-
 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
 {
 	struct ata_host *host = dev_get_drvdata(&pdev->dev);
-- 
cgit v1.2.3-70-g09d2


From dcd0344775c1c0bf8ff3b9541863beea5088a7c9 Mon Sep 17 00:00:00 2001
From: Akira Iguchi <akira2.iguchi@toshiba.co.jp>
Date: Tue, 17 Jul 2007 12:10:17 +0900
Subject: pata_scc.c: small fixes (Workaround for errata A308)

This patch fixes some issues of the previous patch:
- Use mode_filter() hook to limit ATAPI UDMA mode
- "data loss" warning message
- handling of udma_mask

Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Signed-off-by: Akira Iguchi <akira2.iguchi@toshiba.co.jp>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_scc.c | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index c55667e0eb6..c0ffbed3e75 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -238,12 +238,6 @@ static void scc_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	else
 		offset = 0;	/* 100MHz */
 
-	/* errata A308 workaround: limit ATAPI UDMA mode to UDMA4 */
-	if (adev->class == ATA_DEV_ATAPI && speed > XFER_UDMA_4) {
-		printk(KERN_INFO "%s: limit ATAPI UDMA to UDMA4\n", DRV_NAME);
-		speed = XFER_UDMA_4;
-	}
-
 	if (speed >= XFER_UDMA_0)
 		idx = speed - XFER_UDMA_0;
 	else
@@ -264,6 +258,17 @@ static void scc_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 		 JCTSStbl[offset][idx] << 16 | JCENVTtbl[offset][idx]);
 }
 
+unsigned long scc_mode_filter(struct ata_device *adev, unsigned long mask)
+{
+	/* errata A308 workaround: limit ATAPI UDMA mode to UDMA4 */
+	if (adev->class == ATA_DEV_ATAPI &&
+	    (mask & (0xE0 << ATA_SHIFT_UDMA))) {
+		printk(KERN_INFO "%s: limit ATAPI UDMA to UDMA4\n", DRV_NAME);
+		mask &= ~(0xE0 << ATA_SHIFT_UDMA);
+	}
+	return ata_pci_default_filter(adev, mask);
+}
+
 /**
  *	scc_tf_load - send taskfile registers to host controller
  *	@ap: Port to which output is sent
@@ -741,7 +746,7 @@ static u8 scc_bmdma_status (struct ata_port *ap)
 		return host_stat;
 
 	/* errata A252,A308 workaround: Step4 */
-	if (ata_altstatus(ap) & ATA_ERR && int_status & INTSTS_INTRQ)
+	if ((ata_altstatus(ap) & ATA_ERR) && (int_status & INTSTS_INTRQ))
 		return (host_stat | ATA_DMA_INTR);
 
 	/* errata A308 workaround Step5 */
@@ -752,11 +757,11 @@ static u8 scc_bmdma_status (struct ata_port *ap)
 		if ((qc->tf.protocol == ATA_PROT_DMA &&
 		     qc->dev->xfer_mode > XFER_UDMA_4)) {
 			if (!(int_status & INTSTS_ACTEINT)) {
-				printk(KERN_WARNING "ata%u: data lost occurred. (ACTEINT==0, retry:%d)\n",
-				       ap->print_id, retry);
+				printk(KERN_WARNING "ata%u: operation failed (transfer data loss)\n",
+				       ap->print_id);
 				host_stat |= ATA_DMA_ERR;
 				if (retry++)
-					ap->udma_mask >>= 1;
+					ap->udma_mask &= ~(1 << qc->dev->xfer_mode);
 			} else
 				retry = 0;
 		}
@@ -1016,7 +1021,7 @@ static const struct ata_port_operations scc_pata_ops = {
 	.port_disable		= ata_port_disable,
 	.set_piomode		= scc_set_piomode,
 	.set_dmamode		= scc_set_dmamode,
-	.mode_filter		= ata_pci_default_filter,
+	.mode_filter		= scc_mode_filter,
 
 	.tf_load		= scc_tf_load,
 	.tf_read		= scc_tf_read,
-- 
cgit v1.2.3-70-g09d2


From f3a03b0934fb83a030ccd3e6f1fbe845a9c44d49 Mon Sep 17 00:00:00 2001
From: Dave Jones <davej@redhat.com>
Date: Mon, 16 Jul 2007 11:23:03 -0400
Subject: Correct comment in libata-sff.c

The filename in the file header is incorrect.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-sff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index ca7d2245d68..1190c6703bc 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1,5 +1,5 @@
 /*
- *  libata-bmdma.c - helper library for PCI IDE BMDMA
+ *  libata-sff.c - helper library for PCI IDE BMDMA
  *
  *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
  *    		    Please ALWAYS copy linux-ide@vger.kernel.org
-- 
cgit v1.2.3-70-g09d2


From fe36cb53cfd82f3c0796a0826e1c9caf198c8f97 Mon Sep 17 00:00:00 2001
From: Petr Vandrovec <petr@vandrovec.name>
Date: Fri, 20 Jul 2007 07:44:44 -0400
Subject: [libata] Fix reported task file values in sense data

ata_tf_read was setting HOB bit when lba48 command was submitted, but
was not clearing it before reading "normal" data.  As it is only place
which sets HOB bit in control register, and register reads should not
be affected by other bits, let's just clear it when we are done with
reading upper bytes so non-48bit commands do not have to touch ctl
at all.

pata_scc suffered from same problem...

Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-sff.c | 2 ++
 drivers/ata/pata_scc.c   | 2 ++
 2 files changed, 4 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 1190c6703bc..6c289c7b132 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -211,6 +211,8 @@ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
 		tf->hob_lbal = ioread8(ioaddr->lbal_addr);
 		tf->hob_lbam = ioread8(ioaddr->lbam_addr);
 		tf->hob_lbah = ioread8(ioaddr->lbah_addr);
+		iowrite8(tf->ctl, ioaddr->ctl_addr);
+		ap->last_ctl = tf->ctl;
 	}
 }
 
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index c0ffbed3e75..36cdbd2b0bd 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -363,6 +363,8 @@ static void scc_tf_read (struct ata_port *ap, struct ata_taskfile *tf)
 		tf->hob_lbal = in_be32(ioaddr->lbal_addr);
 		tf->hob_lbam = in_be32(ioaddr->lbam_addr);
 		tf->hob_lbah = in_be32(ioaddr->lbah_addr);
+		out_be32(ioaddr->ctl_addr, tf->ctl);
+		ap->last_ctl = tf->ctl;
 	}
 }
 
-- 
cgit v1.2.3-70-g09d2


From 9977126c4b65c1396b665f7a0eeb8c7dede336f9 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:38 +0900
Subject: libata: add @is_cmd to ata_tf_to_fis()

Add @is_cmd to ata_tf_to_fis().  This controls bit 7 of the second
byte which tells the device whether this H2D FIS is for a command or
not.  This cleans up ahci a bit and will be used by PMP.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c        | 10 ++++------
 drivers/ata/libata-core.c | 14 ++++++++------
 drivers/ata/sata_qstor.c  |  2 +-
 drivers/ata/sata_sil24.c  |  2 +-
 include/linux/libata.h    |  3 ++-
 5 files changed, 16 insertions(+), 15 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index eaec5e506f5..61c5b6e68de 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1020,8 +1020,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 			   cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
 
 	tf.ctl |= ATA_SRST;
-	ata_tf_to_fis(&tf, fis, 0);
-	fis[1] &= ~(1 << 7);	/* turn off Command FIS bit */
+	ata_tf_to_fis(&tf, 0, 0, fis);
 
 	writel(1, port_mmio + PORT_CMD_ISSUE);
 
@@ -1039,8 +1038,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 	ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
 
 	tf.ctl &= ~ATA_SRST;
-	ata_tf_to_fis(&tf, fis, 0);
-	fis[1] &= ~(1 << 7);	/* turn off Command FIS bit */
+	ata_tf_to_fis(&tf, 0, 0, fis);
 
 	writel(1, port_mmio + PORT_CMD_ISSUE);
 	readl(port_mmio + PORT_CMD_ISSUE);	/* flush */
@@ -1088,7 +1086,7 @@ static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
 	/* clear D2H reception area to properly wait for D2H FIS */
 	ata_tf_init(ap->device, &tf);
 	tf.command = 0x80;
-	ata_tf_to_fis(&tf, d2h_fis, 0);
+	ata_tf_to_fis(&tf, 0, 0, d2h_fis);
 
 	rc = sata_std_hardreset(ap, class, deadline);
 
@@ -1205,7 +1203,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
 	 */
 	cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
 
-	ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
+	ata_tf_to_fis(&qc->tf, 0, 1, cmd_tbl);
 	if (is_atapi) {
 		memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
 		memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index e2ecb7a4628..39a8e986a4e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -111,8 +111,9 @@ MODULE_VERSION(DRV_VERSION);
 /**
  *	ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
  *	@tf: Taskfile to convert
- *	@fis: Buffer into which data will output
  *	@pmp: Port multiplier port
+ *	@is_cmd: This FIS is for command
+ *	@fis: Buffer into which data will output
  *
  *	Converts a standard ATA taskfile to a Serial ATA
  *	FIS structure (Register - Host to Device).
@@ -120,12 +121,13 @@ MODULE_VERSION(DRV_VERSION);
  *	LOCKING:
  *	Inherited from caller.
  */
-
-void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
+void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
 {
-	fis[0] = 0x27;	/* Register - Host to Device FIS */
-	fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
-					    bit 7 indicates Command FIS */
+	fis[0] = 0x27;			/* Register - Host to Device FIS */
+	fis[1] = pmp & 0xf;		/* Port multiplier number*/
+	if (is_cmd)
+		fis[1] |= (1 << 7);	/* bit 7 indicates Command FIS */
+
 	fis[2] = tf->command;
 	fis[3] = tf->feature;
 
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 9ab554da89b..5aef4ac3701 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -337,7 +337,7 @@ static void qs_qc_prep(struct ata_queued_cmd *qc)
 	buf[28] = dflags;
 
 	/* frame information structure (FIS) */
-	ata_tf_to_fis(&qc->tf, &buf[32], 0);
+	ata_tf_to_fis(&qc->tf, 0, 1, &buf[32]);
 }
 
 static inline void qs_packet_start(struct ata_queued_cmd *qc)
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index ac43a30ebe2..a11007b5071 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -699,7 +699,7 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc)
 	}
 
 	prb->ctrl = cpu_to_le16(ctrl);
-	ata_tf_to_fis(&qc->tf, prb->fis, 0);
+	ata_tf_to_fis(&qc->tf, 0, 1, prb->fis);
 
 	if (qc->flags & ATA_QCFLAG_DMAMAP)
 		sil24_fill_sg(qc, sge);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 47cd2a1c554..5d3df6cde27 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -764,7 +764,8 @@ extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
  */
 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
-extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
+extern void ata_tf_to_fis(const struct ata_taskfile *tf,
+			  u8 pmp, int is_cmd, u8 *fis);
 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
-- 
cgit v1.2.3-70-g09d2


From 2cbb79ebbd4be07041368da5379a64f89f8ad518 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:38 +0900
Subject: ahci: use deadline instead of fixed timeout for 1st FIS for SRST

Use deadline instead of fixed timeout for 1st FIS for SRST to improve
robustness of SRST.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 61c5b6e68de..0451600bdcc 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -976,6 +976,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 	void __iomem *port_mmio = ahci_port_base(ap);
 	const u32 cmd_fis_len = 5; /* five dwords */
 	const char *reason = NULL;
+	unsigned long now, msecs;
 	struct ata_taskfile tf;
 	u32 tmp;
 	u8 *fis;
@@ -1016,6 +1017,11 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 	fis = pp->cmd_tbl;
 
 	/* issue the first D2H Register FIS */
+	msecs = 0;
+	now = jiffies;
+	if (time_after(now, deadline))
+		msecs = jiffies_to_msecs(deadline - now);
+
 	ahci_fill_cmd_slot(pp, 0,
 			   cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
 
@@ -1024,7 +1030,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 
 	writel(1, port_mmio + PORT_CMD_ISSUE);
 
-	tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
+	tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, msecs);
 	if (tmp & 0x1) {
 		rc = -EIO;
 		reason = "1st FIS failed";
-- 
cgit v1.2.3-70-g09d2


From d2e75dfffbe9e86e1d646264792ac9bcd2cc4267 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:39 +0900
Subject: ahci: separate out ahci_kick_engine()

Separate out stop_engine - CLO - start_engine sequence from
ahci_softreset() and ahci_clo() into ahci_reset_engine() and use it in
ahci_softreset() and ahci_post_internal_cmd().  The function will also
be used to prepare for and clean up after PMP register access
commands.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 69 ++++++++++++++++++++++++++++--------------------------
 1 file changed, 36 insertions(+), 33 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 0451600bdcc..1be238def0e 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -948,25 +948,49 @@ static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
 	pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
 }
 
-static int ahci_clo(struct ata_port *ap)
+static int ahci_kick_engine(struct ata_port *ap, int force_restart)
 {
 	void __iomem *port_mmio = ap->ioaddr.cmd_addr;
 	struct ahci_host_priv *hpriv = ap->host->private_data;
 	u32 tmp;
+	int busy, rc;
 
-	if (!(hpriv->cap & HOST_CAP_CLO))
-		return -EOPNOTSUPP;
+	/* do we need to kick the port? */
+	busy = ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ);
+	if (!busy && !force_restart)
+		return 0;
+
+	/* stop engine */
+	rc = ahci_stop_engine(ap);
+	if (rc)
+		goto out_restart;
+
+	/* need to do CLO? */
+	if (!busy) {
+		rc = 0;
+		goto out_restart;
+	}
+
+	if (!(hpriv->cap & HOST_CAP_CLO)) {
+		rc = -EOPNOTSUPP;
+		goto out_restart;
+	}
 
+	/* perform CLO */
 	tmp = readl(port_mmio + PORT_CMD);
 	tmp |= PORT_CMD_CLO;
 	writel(tmp, port_mmio + PORT_CMD);
 
+	rc = 0;
 	tmp = ata_wait_register(port_mmio + PORT_CMD,
 				PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
 	if (tmp & PORT_CMD_CLO)
-		return -EIO;
+		rc = -EIO;
 
-	return 0;
+	/* restart engine */
+ out_restart:
+	ahci_start_engine(ap);
+	return rc;
 }
 
 static int ahci_softreset(struct ata_port *ap, unsigned int *class,
@@ -991,27 +1015,10 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 	}
 
 	/* prepare for SRST (AHCI-1.1 10.4.1) */
-	rc = ahci_stop_engine(ap);
-	if (rc) {
-		reason = "failed to stop engine";
-		goto fail_restart;
-	}
-
-	/* check BUSY/DRQ, perform Command List Override if necessary */
-	if (ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ)) {
-		rc = ahci_clo(ap);
-
-		if (rc == -EOPNOTSUPP) {
-			reason = "port busy but CLO unavailable";
-			goto fail_restart;
-		} else if (rc) {
-			reason = "port busy but CLO failed";
-			goto fail_restart;
-		}
-	}
-
-	/* restart engine */
-	ahci_start_engine(ap);
+	rc = ahci_kick_engine(ap, 1);
+	if (rc)
+		ata_port_printk(ap, KERN_WARNING,
+				"failed to reset engine (errno=%d)", rc);
 
 	ata_tf_init(ap->device, &tf);
 	fis = pp->cmd_tbl;
@@ -1070,8 +1077,6 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 	DPRINTK("EXIT, class=%u\n", *class);
 	return 0;
 
- fail_restart:
-	ahci_start_engine(ap);
  fail:
 	ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
 	return rc;
@@ -1516,11 +1521,9 @@ static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 
-	if (qc->flags & ATA_QCFLAG_FAILED) {
-		/* make DMA engine forget about the failed command */
-		ahci_stop_engine(ap);
-		ahci_start_engine(ap);
-	}
+	/* make DMA engine forget about the failed command */
+	if (qc->flags & ATA_QCFLAG_FAILED)
+		ahci_kick_engine(ap, 1);
 }
 
 static int ahci_port_resume(struct ata_port *ap)
-- 
cgit v1.2.3-70-g09d2


From 91c4a2e09267b0ddc8e59d121e3748cd18675739 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:39 +0900
Subject: ahci: separate out ahci_exec_polled_cmd()

Separate out ahci_exec_polled_cmd() from ahci_softreset().  This will
be used to implement ahci_pmp_read/write().  ahci_exec_polled_cmd()
performs reset_engine before returning if the command fails (times
out).  This is to improve robustness.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 54 +++++++++++++++++++++++++++++++++---------------------
 1 file changed, 33 insertions(+), 21 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 1be238def0e..db65f4a1602 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -993,17 +993,42 @@ static int ahci_kick_engine(struct ata_port *ap, int force_restart)
 	return rc;
 }
 
-static int ahci_softreset(struct ata_port *ap, unsigned int *class,
-			  unsigned long deadline)
+static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
+				struct ata_taskfile *tf, int is_cmd, u16 flags,
+				unsigned long timeout_msec)
 {
+	const u32 cmd_fis_len = 5; /* five dwords */
 	struct ahci_port_priv *pp = ap->private_data;
 	void __iomem *port_mmio = ahci_port_base(ap);
-	const u32 cmd_fis_len = 5; /* five dwords */
+	u8 *fis = pp->cmd_tbl;
+	u32 tmp;
+
+	/* prep the command */
+	ata_tf_to_fis(tf, pmp, is_cmd, fis);
+	ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
+
+	/* issue & wait */
+	writel(1, port_mmio + PORT_CMD_ISSUE);
+
+	if (timeout_msec) {
+		tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
+					1, timeout_msec);
+		if (tmp & 0x1) {
+			ahci_kick_engine(ap, 1);
+			return -EBUSY;
+		}
+	} else
+		readl(port_mmio + PORT_CMD_ISSUE);	/* flush */
+
+	return 0;
+}
+
+static int ahci_softreset(struct ata_port *ap, unsigned int *class,
+			  unsigned long deadline)
+{
 	const char *reason = NULL;
 	unsigned long now, msecs;
 	struct ata_taskfile tf;
-	u32 tmp;
-	u8 *fis;
 	int rc;
 
 	DPRINTK("ENTER\n");
@@ -1021,7 +1046,6 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 				"failed to reset engine (errno=%d)", rc);
 
 	ata_tf_init(ap->device, &tf);
-	fis = pp->cmd_tbl;
 
 	/* issue the first D2H Register FIS */
 	msecs = 0;
@@ -1029,16 +1053,9 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 	if (time_after(now, deadline))
 		msecs = jiffies_to_msecs(deadline - now);
 
-	ahci_fill_cmd_slot(pp, 0,
-			   cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
-
 	tf.ctl |= ATA_SRST;
-	ata_tf_to_fis(&tf, 0, 0, fis);
-
-	writel(1, port_mmio + PORT_CMD_ISSUE);
-
-	tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, msecs);
-	if (tmp & 0x1) {
+	if (ahci_exec_polled_cmd(ap, 0, &tf, 0,
+				 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
 		rc = -EIO;
 		reason = "1st FIS failed";
 		goto fail;
@@ -1048,13 +1065,8 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 	msleep(1);
 
 	/* issue the second D2H Register FIS */
-	ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
-
 	tf.ctl &= ~ATA_SRST;
-	ata_tf_to_fis(&tf, 0, 0, fis);
-
-	writel(1, port_mmio + PORT_CMD_ISSUE);
-	readl(port_mmio + PORT_CMD_ISSUE);	/* flush */
+	ahci_exec_polled_cmd(ap, 0, &tf, 0, 0, 0);
 
 	/* spec mandates ">= 2ms" before checking status.
 	 * We wait 150ms, because that was the magic delay used for
-- 
cgit v1.2.3-70-g09d2


From a9cf5e858100b2f82ad61028c26a1a3de11c4839 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:39 +0900
Subject: ahci: separate out ahci_do_softreset()

Separate out ahci_do_softreset() which takes @pmp as its last
argument.  This will be used to implement ahci_pmp_softreset().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index db65f4a1602..c5034d450c6 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1023,8 +1023,8 @@ static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
 	return 0;
 }
 
-static int ahci_softreset(struct ata_port *ap, unsigned int *class,
-			  unsigned long deadline)
+static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
+			     int pmp, unsigned long deadline)
 {
 	const char *reason = NULL;
 	unsigned long now, msecs;
@@ -1054,7 +1054,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 		msecs = jiffies_to_msecs(deadline - now);
 
 	tf.ctl |= ATA_SRST;
-	if (ahci_exec_polled_cmd(ap, 0, &tf, 0,
+	if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
 				 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
 		rc = -EIO;
 		reason = "1st FIS failed";
@@ -1066,7 +1066,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 
 	/* issue the second D2H Register FIS */
 	tf.ctl &= ~ATA_SRST;
-	ahci_exec_polled_cmd(ap, 0, &tf, 0, 0, 0);
+	ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
 
 	/* spec mandates ">= 2ms" before checking status.
 	 * We wait 150ms, because that was the magic delay used for
@@ -1094,6 +1094,12 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
 	return rc;
 }
 
+static int ahci_softreset(struct ata_port *ap, unsigned int *class,
+			  unsigned long deadline)
+{
+	return ahci_do_softreset(ap, class, 0, deadline);
+}
+
 static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
 			  unsigned long deadline)
 {
-- 
cgit v1.2.3-70-g09d2


From e59f0dad33176a13803ff8a41cc639a06c43d381 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:39 +0900
Subject: sata_sil24: replace sil24_update_tf() with sil24_read_tf()

Replace sil24_update_tf() to sil24_read_tf() which reads TF into
passed int result TF argument and can read TFs of PMP links.  This
will be used by PMP support.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_sil24.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index a11007b5071..5f8afa95004 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -464,15 +464,15 @@ static void sil24_dev_config(struct ata_device *dev)
 		writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
 }
 
-static inline void sil24_update_tf(struct ata_port *ap)
+static void sil24_read_tf(struct ata_port *ap, int tag, struct ata_taskfile *tf)
 {
-	struct sil24_port_priv *pp = ap->private_data;
 	void __iomem *port = ap->ioaddr.cmd_addr;
-	struct sil24_prb __iomem *prb = port;
+	struct sil24_prb __iomem *prb;
 	u8 fis[6 * 4];
 
-	memcpy_fromio(fis, prb->fis, 6 * 4);
-	ata_tf_from_fis(fis, &pp->tf);
+	prb = port + PORT_LRAM + sil24_tag(tag) * PORT_LRAM_SLOT_SZ;
+	memcpy_fromio(fis, prb->fis, sizeof(fis));
+	ata_tf_from_fis(fis, tf);
 }
 
 static u8 sil24_check_status(struct ata_port *ap)
@@ -538,6 +538,7 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 	struct sil24_port_priv *pp = ap->private_data;
 	struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
 	dma_addr_t paddr = pp->cmd_block_dma;
+	struct ata_taskfile tf;
 	u32 mask, irq_stat;
 	const char *reason;
 
@@ -577,8 +578,8 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 		goto err;
 	}
 
-	sil24_update_tf(ap);
-	*class = ata_dev_classify(&pp->tf);
+	sil24_read_tf(ap, 0, &tf);
+	*class = ata_dev_classify(&tf);
 
 	if (*class == ATA_DEV_UNKNOWN)
 		*class = ATA_DEV_NONE;
@@ -754,6 +755,7 @@ static void sil24_thaw(struct ata_port *ap)
 static void sil24_error_intr(struct ata_port *ap)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
+	struct sil24_port_priv *pp = ap->private_data;
 	struct ata_eh_info *ehi = &ap->eh_info;
 	int freeze = 0;
 	u32 irq_stat;
@@ -808,7 +810,7 @@ static void sil24_error_intr(struct ata_port *ap)
 		/* record error info */
 		qc = ata_qc_from_tag(ap, ap->active_tag);
 		if (qc) {
-			sil24_update_tf(ap);
+			sil24_read_tf(ap, qc->tag, &pp->tf);
 			qc->err_mask |= err_mask;
 		} else
 			ehi->err_mask |= err_mask;
@@ -825,8 +827,11 @@ static void sil24_error_intr(struct ata_port *ap)
 
 static void sil24_finish_qc(struct ata_queued_cmd *qc)
 {
+	struct ata_port *ap = qc->ap;
+	struct sil24_port_priv *pp = ap->private_data;
+
 	if (qc->flags & ATA_QCFLAG_RESULT_TF)
-		sil24_update_tf(qc->ap);
+		sil24_read_tf(ap, qc->tag, &pp->tf);
 }
 
 static inline void sil24_host_intr(struct ata_port *ap)
-- 
cgit v1.2.3-70-g09d2


From 37b99cba8c2a3fd05a3a9f652cc2b3e48d1b9197 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:39 +0900
Subject: sata_sil24: separate out sil24_exec_polled_cmd()

Separate out sil24_exec_polled_cmd() from sil24_softreset().  This
will be used to implement sil24_pmp_read/write().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_sil24.c | 76 +++++++++++++++++++++++++++++++++++-------------
 1 file changed, 56 insertions(+), 20 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 5f8afa95004..e6fe4c424a6 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -531,16 +531,60 @@ static int sil24_init_port(struct ata_port *ap)
 	return 0;
 }
 
-static int sil24_softreset(struct ata_port *ap, unsigned int *class,
-			   unsigned long deadline)
+static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
+				 const struct ata_taskfile *tf,
+				 int is_cmd, u32 ctrl,
+				 unsigned long timeout_msec)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
 	struct sil24_port_priv *pp = ap->private_data;
 	struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
 	dma_addr_t paddr = pp->cmd_block_dma;
+	u32 irq_enabled, irq_mask, irq_stat;
+	int rc;
+
+	prb->ctrl = cpu_to_le16(ctrl);
+	ata_tf_to_fis(tf, pmp, is_cmd, prb->fis);
+
+	/* temporarily plug completion and error interrupts */
+	irq_enabled = readl(port + PORT_IRQ_ENABLE_SET);
+	writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR);
+
+	writel((u32)paddr, port + PORT_CMD_ACTIVATE);
+	writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
+
+	irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
+	irq_stat = ata_wait_register(port + PORT_IRQ_STAT, irq_mask, 0x0,
+				     10, timeout_msec);
+
+	writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */
+	irq_stat >>= PORT_IRQ_RAW_SHIFT;
+
+	if (irq_stat & PORT_IRQ_COMPLETE)
+		rc = 0;
+	else {
+		/* force port into known state */
+		sil24_init_port(ap);
+
+		if (irq_stat & PORT_IRQ_ERROR)
+			rc = -EIO;
+		else
+			rc = -EBUSY;
+	}
+
+	/* restore IRQ enabled */
+	writel(irq_enabled, port + PORT_IRQ_ENABLE_SET);
+
+	return rc;
+}
+
+static int sil24_softreset(struct ata_port *ap, unsigned int *class,
+			   unsigned long deadline)
+{
+	unsigned long timeout_msec = 0;
 	struct ata_taskfile tf;
-	u32 mask, irq_stat;
 	const char *reason;
+	int rc;
 
 	DPRINTK("ENTER\n");
 
@@ -557,24 +601,16 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 	}
 
 	/* do SRST */
-	prb->ctrl = cpu_to_le16(PRB_CTRL_SRST);
-	prb->fis[1] = 0; /* no PMP yet */
+	if (time_after(deadline, jiffies))
+		timeout_msec = jiffies_to_msecs(deadline - jiffies);
 
-	writel((u32)paddr, port + PORT_CMD_ACTIVATE);
-	writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
-
-	mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
-	irq_stat = ata_wait_register(port + PORT_IRQ_STAT, mask, 0x0,
-				     100, jiffies_to_msecs(deadline - jiffies));
-
-	writel(irq_stat, port + PORT_IRQ_STAT); /* clear IRQs */
-	irq_stat >>= PORT_IRQ_RAW_SHIFT;
-
-	if (!(irq_stat & PORT_IRQ_COMPLETE)) {
-		if (irq_stat & PORT_IRQ_ERROR)
-			reason = "SRST command error";
-		else
-			reason = "timeout";
+	ata_tf_init(ap->device, &tf);	/* doesn't really matter */
+	rc = sil24_exec_polled_cmd(ap, 0, &tf, 0, PRB_CTRL_SRST, timeout_msec);
+	if (rc == -EBUSY) {
+		reason = "timeout";
+		goto err;
+	} else if (rc) {
+		reason = "SRST command error";
 		goto err;
 	}
 
-- 
cgit v1.2.3-70-g09d2


From 975530e8a33fdeb1ad80d82fde11d56bf9ed2760 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:39 +0900
Subject: sata_sil24: separate out sil24_do_softreset()

Separate out sil24_do_softreset() which takes @pmp as its last
argument.  This will be used to implement sil24_pmp_softreset().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_sil24.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index e6fe4c424a6..e538edc1b4e 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -578,8 +578,8 @@ static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
 	return rc;
 }
 
-static int sil24_softreset(struct ata_port *ap, unsigned int *class,
-			   unsigned long deadline)
+static int sil24_do_softreset(struct ata_port *ap, unsigned int *class,
+			      int pmp, unsigned long deadline)
 {
 	unsigned long timeout_msec = 0;
 	struct ata_taskfile tf;
@@ -605,7 +605,8 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 		timeout_msec = jiffies_to_msecs(deadline - jiffies);
 
 	ata_tf_init(ap->device, &tf);	/* doesn't really matter */
-	rc = sil24_exec_polled_cmd(ap, 0, &tf, 0, PRB_CTRL_SRST, timeout_msec);
+	rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST,
+				   timeout_msec);
 	if (rc == -EBUSY) {
 		reason = "timeout";
 		goto err;
@@ -629,6 +630,12 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 	return -EIO;
 }
 
+static int sil24_softreset(struct ata_port *ap, unsigned int *class,
+			   unsigned long deadline)
+{
+	return sil24_do_softreset(ap, class, 0, deadline);
+}
+
 static int sil24_hardreset(struct ata_port *ap, unsigned int *class,
 			   unsigned long deadline)
 {
-- 
cgit v1.2.3-70-g09d2


From b64bbc39f2122a2276578e40144af69ef01decd4 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:39 +0900
Subject: libata: improve EH report formatting

Requiring LLDs to format multiple error description messages properly
doesn't work too well.  Help LLDs a bit by making ata_ehi_push_desc()
insert ", " on each invocation.  __ata_ehi_push_desc() is the raw
version without the automatic separator.

While at it, make ehi_desc interface proper functions instead of
macros.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c        |  6 ++---
 drivers/ata/libata-core.c |  3 +++
 drivers/ata/libata-eh.c   | 69 +++++++++++++++++++++++++++++++++++++++++++++--
 drivers/ata/sata_mv.c     |  8 +++---
 drivers/ata/sata_nv.c     | 22 ++++++++-------
 drivers/ata/sata_sil24.c  | 12 ++++-----
 include/linux/libata.h    | 13 +++------
 7 files changed, 98 insertions(+), 35 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index c5034d450c6..210292cd8ad 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1289,12 +1289,12 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 	if (irq_stat & PORT_IRQ_IF_ERR) {
 		err_mask |= AC_ERR_ATA_BUS;
 		action |= ATA_EH_SOFTRESET;
-		ata_ehi_push_desc(ehi, ", interface fatal error");
+		ata_ehi_push_desc(ehi, "interface fatal error");
 	}
 
 	if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
 		ata_ehi_hotplugged(ehi);
-		ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
+		ata_ehi_push_desc(ehi, "%s", irq_stat & PORT_IRQ_CONNECT ?
 			"connection status changed" : "PHY RDY changed");
 	}
 
@@ -1303,7 +1303,7 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 
 		err_mask |= AC_ERR_HSM;
 		action |= ATA_EH_SOFTRESET;
-		ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
+		ata_ehi_push_desc(ehi, "unknown FIS %08x %08x %08x %08x",
 				  unk[0], unk[1], unk[2], unk[3]);
 	}
 
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 39a8e986a4e..ecbc3278238 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6945,6 +6945,9 @@ EXPORT_SYMBOL_GPL(ata_pci_default_filter);
 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
 #endif /* CONFIG_PCI */
 
+EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
+EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
+EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
 EXPORT_SYMBOL_GPL(ata_eng_timeout);
 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
 EXPORT_SYMBOL_GPL(ata_port_abort);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 9aa62a0754f..96b184ebf70 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -85,6 +85,71 @@ static void ata_eh_handle_port_resume(struct ata_port *ap)
 { }
 #endif /* CONFIG_PM */
 
+static void __ata_ehi_pushv_desc(struct ata_eh_info *ehi, const char *fmt,
+				 va_list args)
+{
+	ehi->desc_len += vscnprintf(ehi->desc + ehi->desc_len,
+				     ATA_EH_DESC_LEN - ehi->desc_len,
+				     fmt, args);
+}
+
+/**
+ *	__ata_ehi_push_desc - push error description without adding separator
+ *	@ehi: target EHI
+ *	@fmt: printf format string
+ *
+ *	Format string according to @fmt and append it to @ehi->desc.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ */
+void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	__ata_ehi_pushv_desc(ehi, fmt, args);
+	va_end(args);
+}
+
+/**
+ *	ata_ehi_push_desc - push error description with separator
+ *	@ehi: target EHI
+ *	@fmt: printf format string
+ *
+ *	Format string according to @fmt and append it to @ehi->desc.
+ *	If @ehi->desc is not empty, ", " is added in-between.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ */
+void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
+{
+	va_list args;
+
+	if (ehi->desc_len)
+		__ata_ehi_push_desc(ehi, ", ");
+
+	va_start(args, fmt);
+	__ata_ehi_pushv_desc(ehi, fmt, args);
+	va_end(args);
+}
+
+/**
+ *	ata_ehi_clear_desc - clean error description
+ *	@ehi: target EHI
+ *
+ *	Clear @ehi->desc.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ */
+void ata_ehi_clear_desc(struct ata_eh_info *ehi)
+{
+	ehi->desc[0] = '\0';
+	ehi->desc_len = 0;
+}
+
 static void ata_ering_record(struct ata_ering *ering, int is_io,
 			     unsigned int err_mask)
 {
@@ -1524,14 +1589,14 @@ static void ata_eh_report(struct ata_port *ap)
 			       ehc->i.err_mask, ap->sactive, ehc->i.serror,
 			       ehc->i.action, frozen);
 		if (desc)
-			ata_dev_printk(ehc->i.dev, KERN_ERR, "(%s)\n", desc);
+			ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc);
 	} else {
 		ata_port_printk(ap, KERN_ERR, "exception Emask 0x%x "
 				"SAct 0x%x SErr 0x%x action 0x%x%s\n",
 				ehc->i.err_mask, ap->sactive, ehc->i.serror,
 				ehc->i.action, frozen);
 		if (desc)
-			ata_port_printk(ap, KERN_ERR, "(%s)\n", desc);
+			ata_port_printk(ap, KERN_ERR, "%s\n", desc);
 	}
 
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 80ade5b93b8..b4b737e081e 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1411,12 +1411,12 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
 			EDMA_ERR_INTRL_PAR)) {
 		err_mask |= AC_ERR_ATA_BUS;
 		action |= ATA_EH_HARDRESET;
-		ata_ehi_push_desc(ehi, ", parity error");
+		ata_ehi_push_desc(ehi, "parity error");
 	}
 	if (edma_err_cause & (EDMA_ERR_DEV_DCON | EDMA_ERR_DEV_CON)) {
 		ata_ehi_hotplugged(ehi);
 		ata_ehi_push_desc(ehi, edma_err_cause & EDMA_ERR_DEV_DCON ?
-			", dev disconnect" : ", dev connect");
+			"dev disconnect" : "dev connect");
 	}
 
 	if (IS_GEN_I(hpriv)) {
@@ -1425,7 +1425,7 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
 		if (edma_err_cause & EDMA_ERR_SELF_DIS_5) {
 			struct mv_port_priv *pp	= ap->private_data;
 			pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
-			ata_ehi_push_desc(ehi, ", EDMA self-disable");
+			ata_ehi_push_desc(ehi, "EDMA self-disable");
 		}
 	} else {
 		eh_freeze_mask = EDMA_EH_FREEZE;
@@ -1433,7 +1433,7 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
 		if (edma_err_cause & EDMA_ERR_SELF_DIS) {
 			struct mv_port_priv *pp	= ap->private_data;
 			pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
-			ata_ehi_push_desc(ehi, ", EDMA self-disable");
+			ata_ehi_push_desc(ehi, "EDMA self-disable");
 		}
 
 		if (edma_err_cause & EDMA_ERR_SERR) {
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index db81e3efa5e..5d943da042f 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -715,19 +715,20 @@ static int nv_adma_check_cpb(struct ata_port *ap, int cpb_num, int force_err)
 		int freeze = 0;
 
 		ata_ehi_clear_desc(ehi);
-		ata_ehi_push_desc(ehi, "CPB resp_flags 0x%x", flags );
+		__ata_ehi_push_desc(ehi, "CPB resp_flags 0x%x: ", flags );
 		if (flags & NV_CPB_RESP_ATA_ERR) {
-			ata_ehi_push_desc(ehi, ": ATA error");
+			ata_ehi_push_desc(ehi, "ATA error");
 			ehi->err_mask |= AC_ERR_DEV;
 		} else if (flags & NV_CPB_RESP_CMD_ERR) {
-			ata_ehi_push_desc(ehi, ": CMD error");
+			ata_ehi_push_desc(ehi, "CMD error");
 			ehi->err_mask |= AC_ERR_DEV;
 		} else if (flags & NV_CPB_RESP_CPB_ERR) {
-			ata_ehi_push_desc(ehi, ": CPB error");
+			ata_ehi_push_desc(ehi, "CPB error");
 			ehi->err_mask |= AC_ERR_SYSTEM;
 			freeze = 1;
 		} else {
 			/* notifier error, but no error in CPB flags? */
+			ata_ehi_push_desc(ehi, "unknown");
 			ehi->err_mask |= AC_ERR_OTHER;
 			freeze = 1;
 		}
@@ -854,20 +855,21 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
 				struct ata_eh_info *ehi = &ap->eh_info;
 
 				ata_ehi_clear_desc(ehi);
-				ata_ehi_push_desc(ehi, "ADMA status 0x%08x", status );
+				__ata_ehi_push_desc(ehi, "ADMA status 0x%08x: ", status );
 				if (status & NV_ADMA_STAT_TIMEOUT) {
 					ehi->err_mask |= AC_ERR_SYSTEM;
-					ata_ehi_push_desc(ehi, ": timeout");
+					ata_ehi_push_desc(ehi, "timeout");
 				} else if (status & NV_ADMA_STAT_HOTPLUG) {
 					ata_ehi_hotplugged(ehi);
-					ata_ehi_push_desc(ehi, ": hotplug");
+					ata_ehi_push_desc(ehi, "hotplug");
 				} else if (status & NV_ADMA_STAT_HOTUNPLUG) {
 					ata_ehi_hotplugged(ehi);
-					ata_ehi_push_desc(ehi, ": hot unplug");
+					ata_ehi_push_desc(ehi, "hot unplug");
 				} else if (status & NV_ADMA_STAT_SERROR) {
 					/* let libata analyze SError and figure out the cause */
-					ata_ehi_push_desc(ehi, ": SError");
-				}
+					ata_ehi_push_desc(ehi, "SError");
+				} else
+					ata_ehi_push_desc(ehi, "unknown");
 				ata_port_freeze(ap);
 				continue;
 			}
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index e538edc1b4e..e201f1cab66 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -814,16 +814,16 @@ static void sil24_error_intr(struct ata_port *ap)
 
 	if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
 		ata_ehi_hotplugged(ehi);
-		ata_ehi_push_desc(ehi, ", %s",
-			       irq_stat & PORT_IRQ_PHYRDY_CHG ?
-			       "PHY RDY changed" : "device exchanged");
+		ata_ehi_push_desc(ehi, "%s",
+				  irq_stat & PORT_IRQ_PHYRDY_CHG ?
+				  "PHY RDY changed" : "device exchanged");
 		freeze = 1;
 	}
 
 	if (irq_stat & PORT_IRQ_UNK_FIS) {
 		ehi->err_mask |= AC_ERR_HSM;
 		ehi->action |= ATA_EH_SOFTRESET;
-		ata_ehi_push_desc(ehi , ", unknown FIS");
+		ata_ehi_push_desc(ehi, "unknown FIS");
 		freeze = 1;
 	}
 
@@ -842,11 +842,11 @@ static void sil24_error_intr(struct ata_port *ap)
 		if (ci && ci->desc) {
 			err_mask |= ci->err_mask;
 			action |= ci->action;
-			ata_ehi_push_desc(ehi, ", %s", ci->desc);
+			ata_ehi_push_desc(ehi, "%s", ci->desc);
 		} else {
 			err_mask |= AC_ERR_OTHER;
 			action |= ATA_EH_SOFTRESET;
-			ata_ehi_push_desc(ehi, ", unknown command error %d",
+			ata_ehi_push_desc(ehi, "unknown command error %d",
 					  cerr);
 		}
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 5d3df6cde27..94b37d18068 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -910,16 +910,9 @@ extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
 /*
  * ata_eh_info helpers
  */
-#define ata_ehi_push_desc(ehi, fmt, args...) do { \
-	(ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
-				     ATA_EH_DESC_LEN - (ehi)->desc_len, \
-				     fmt , ##args); \
-} while (0)
-
-#define ata_ehi_clear_desc(ehi) do { \
-	(ehi)->desc[0] = '\0'; \
-	(ehi)->desc_len = 0; \
-} while (0)
+extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
+extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
+extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
 
 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
 {
-- 
cgit v1.2.3-70-g09d2


From 5335b729064e03319cd2d5219770451dbb1d7f67 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:40 +0900
Subject: libata: implement AC_ERR_NCQ

When an NCQ command fails, all commands in flight are aborted and the
offending one is reported using log page 10h.  Depending on controller
characteristics and LLD implementation, all commands may appear as
having a device error due to shared TF status making it hard to
determine what's actually going on.

This patch adds AC_ERR_NCQ, marks the command reported by log page 10h
with it and print extra "<F>" after the error report for the command
to help distinguishing the offending command.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 7 ++++---
 include/linux/libata.h  | 1 +
 2 files changed, 5 insertions(+), 3 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 96b184ebf70..19f9947bd96 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1195,7 +1195,7 @@ static void ata_eh_analyze_ncq_error(struct ata_port *ap)
 	/* we've got the perpetrator, condemn it */
 	qc = __ata_qc_from_tag(ap, tag);
 	memcpy(&qc->result_tf, &tf, sizeof(tf));
-	qc->err_mask |= AC_ERR_DEV;
+	qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ;
 	ehc->i.err_mask &= ~AC_ERR_DEV;
 }
 
@@ -1616,7 +1616,7 @@ static void ata_eh_report(struct ata_port *ap)
 			"cmd %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x "
 			"tag %d cdb 0x%x data %u %s\n         "
 			"res %02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x "
-			"Emask 0x%x (%s)\n",
+			"Emask 0x%x (%s)%s\n",
 			cmd->command, cmd->feature, cmd->nsect,
 			cmd->lbal, cmd->lbam, cmd->lbah,
 			cmd->hob_feature, cmd->hob_nsect,
@@ -1627,7 +1627,8 @@ static void ata_eh_report(struct ata_port *ap)
 			res->lbal, res->lbam, res->lbah,
 			res->hob_feature, res->hob_nsect,
 			res->hob_lbal, res->hob_lbam, res->hob_lbah,
-			res->device, qc->err_mask, ata_err_string(qc->err_mask));
+			res->device, qc->err_mask, ata_err_string(qc->err_mask),
+			qc->err_mask & AC_ERR_NCQ ? " <F>" : "");
 	}
 }
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 94b37d18068..cb181713d9b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -323,6 +323,7 @@ enum ata_completion_errors {
 	AC_ERR_INVALID		= (1 << 7), /* invalid argument */
 	AC_ERR_OTHER		= (1 << 8), /* unknown */
 	AC_ERR_NODEV_HINT	= (1 << 9), /* polling device detection hint */
+	AC_ERR_NCQ		= (1 << 10), /* marker for offending NCQ qc */
 };
 
 /* forward declarations */
-- 
cgit v1.2.3-70-g09d2


From da3dbb17a0e9a9ec7f5aed95f1fddadb790edc9d Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:40 +0900
Subject: libata: make ->scr_read/write callbacks return error code

Convert ->scr_read/write callbacks to return error code to better
indicate failure.  This will help handling of SCR_NOTIFICATION.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c          | 23 ++++++++-------
 drivers/ata/libata-core.c   | 21 +++++++------
 drivers/ata/sata_inic162x.c | 16 +++++-----
 drivers/ata/sata_mv.c       | 72 ++++++++++++++++++++++++++++++---------------
 drivers/ata/sata_nv.c       | 16 +++++-----
 drivers/ata/sata_promise.c  | 25 +++++++++-------
 drivers/ata/sata_qstor.c    | 16 +++++-----
 drivers/ata/sata_sil.c      | 25 ++++++++++------
 drivers/ata/sata_sil24.c    | 17 +++++++----
 drivers/ata/sata_sis.c      | 22 +++++++-------
 drivers/ata/sata_svw.c      | 13 ++++----
 drivers/ata/sata_uli.c      | 16 +++++-----
 drivers/ata/sata_via.c      | 27 +++++++++--------
 drivers/ata/sata_vsc.c      | 13 ++++----
 include/linux/libata.h      |  5 ++--
 15 files changed, 191 insertions(+), 136 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 210292cd8ad..e044d6477a0 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -216,8 +216,8 @@ struct ahci_port_priv {
 	unsigned int		ncq_saw_sdb:1;
 };
 
-static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
 static void ahci_irq_clear(struct ata_port *ap);
@@ -625,7 +625,7 @@ static void ahci_restore_initial_config(struct ata_host *host)
 	(void) readl(mmio + HOST_PORTS_IMPL);	/* flush */
 }
 
-static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
+static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val)
 {
 	unsigned int sc_reg;
 
@@ -635,15 +635,15 @@ static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
 	case SCR_ERROR:		sc_reg = 2; break;
 	case SCR_ACTIVE:	sc_reg = 3; break;
 	default:
-		return 0xffffffffU;
+		return -EINVAL;
 	}
 
-	return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+	*val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 
-static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
-			       u32 val)
+static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
 {
 	unsigned int sc_reg;
 
@@ -653,10 +653,11 @@ static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
 	case SCR_ERROR:		sc_reg = 2; break;
 	case SCR_ACTIVE:	sc_reg = 3; break;
 	default:
-		return;
+		return -EINVAL;
 	}
 
 	writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 static void ahci_start_engine(struct ata_port *ap)
@@ -1133,6 +1134,7 @@ static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
 static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
 				 unsigned long deadline)
 {
+	u32 serror;
 	int rc;
 
 	DPRINTK("ENTER\n");
@@ -1143,7 +1145,8 @@ static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
 				 deadline);
 
 	/* vt8251 needs SError cleared for the port to operate */
-	ahci_scr_write(ap, SCR_ERROR, ahci_scr_read(ap, SCR_ERROR));
+	ahci_scr_read(ap, SCR_ERROR, &serror);
+	ahci_scr_write(ap, SCR_ERROR, serror);
 
 	ahci_start_engine(ap);
 
@@ -1265,7 +1268,7 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 	ata_ehi_clear_desc(ehi);
 
 	/* AHCI needs SError cleared; otherwise, it might lock up */
-	serror = ahci_scr_read(ap, SCR_ERROR);
+	ahci_scr_read(ap, SCR_ERROR, &serror);
 	ahci_scr_write(ap, SCR_ERROR, serror);
 
 	/* analyze @irq_stat */
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index ecbc3278238..5718c247e23 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5732,10 +5732,8 @@ int sata_scr_valid(struct ata_port *ap)
  */
 int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
 {
-	if (sata_scr_valid(ap)) {
-		*val = ap->ops->scr_read(ap, reg);
-		return 0;
-	}
+	if (sata_scr_valid(ap))
+		return ap->ops->scr_read(ap, reg, val);
 	return -EOPNOTSUPP;
 }
 
@@ -5757,10 +5755,8 @@ int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
  */
 int sata_scr_write(struct ata_port *ap, int reg, u32 val)
 {
-	if (sata_scr_valid(ap)) {
-		ap->ops->scr_write(ap, reg, val);
-		return 0;
-	}
+	if (sata_scr_valid(ap))
+		return ap->ops->scr_write(ap, reg, val);
 	return -EOPNOTSUPP;
 }
 
@@ -5781,10 +5777,13 @@ int sata_scr_write(struct ata_port *ap, int reg, u32 val)
  */
 int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
 {
+	int rc;
+
 	if (sata_scr_valid(ap)) {
-		ap->ops->scr_write(ap, reg, val);
-		ap->ops->scr_read(ap, reg);
-		return 0;
+		rc = ap->ops->scr_write(ap, reg, val);
+		if (rc == 0)
+			rc = ap->ops->scr_read(ap, reg, &val);
+		return rc;
 	}
 	return -EOPNOTSUPP;
 }
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 3de183461c3..a9c948d7604 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -190,34 +190,34 @@ static void inic_reset_port(void __iomem *port_base)
 	writew(ctl, idma_ctl);
 }
 
-static u32 inic_scr_read(struct ata_port *ap, unsigned sc_reg)
+static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
 {
 	void __iomem *scr_addr = ap->ioaddr.scr_addr;
 	void __iomem *addr;
-	u32 val;
 
 	if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
-		return 0xffffffffU;
+		return -EINVAL;
 
 	addr = scr_addr + scr_map[sc_reg] * 4;
-	val = readl(scr_addr + scr_map[sc_reg] * 4);
+	*val = readl(scr_addr + scr_map[sc_reg] * 4);
 
 	/* this controller has stuck DIAG.N, ignore it */
 	if (sc_reg == SCR_ERROR)
-		val &= ~SERR_PHYRDY_CHG;
-	return val;
+		*val &= ~SERR_PHYRDY_CHG;
+	return 0;
 }
 
-static void inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
+static int inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
 {
 	void __iomem *scr_addr = ap->ioaddr.scr_addr;
 	void __iomem *addr;
 
 	if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
-		return;
+		return -EINVAL;
 
 	addr = scr_addr + scr_map[sc_reg] * 4;
 	writel(val, scr_addr + scr_map[sc_reg] * 4);
+	return 0;
 }
 
 /*
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index b4b737e081e..8ec520885b9 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -404,10 +404,10 @@ struct mv_host_priv {
 };
 
 static void mv_irq_clear(struct ata_port *ap);
-static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in);
-static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
-static u32 mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in);
-static void mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
+static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val);
+static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
+static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val);
+static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
 static int mv_port_start(struct ata_port *ap);
 static void mv_port_stop(struct ata_port *ap);
 static void mv_qc_prep(struct ata_queued_cmd *qc);
@@ -974,22 +974,26 @@ static unsigned int mv_scr_offset(unsigned int sc_reg_in)
 	return ofs;
 }
 
-static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
+static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val)
 {
 	unsigned int ofs = mv_scr_offset(sc_reg_in);
 
-	if (ofs != 0xffffffffU)
-		return readl(mv_ap_base(ap) + ofs);
-	else
-		return (u32) ofs;
+	if (ofs != 0xffffffffU) {
+		*val = readl(mv_ap_base(ap) + ofs);
+		return 0;
+	} else
+		return -EINVAL;
 }
 
-static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
+static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
 {
 	unsigned int ofs = mv_scr_offset(sc_reg_in);
 
-	if (ofs != 0xffffffffU)
+	if (ofs != 0xffffffffU) {
 		writelfl(val, mv_ap_base(ap) + ofs);
+		return 0;
+	} else
+		return -EINVAL;
 }
 
 static void mv_edma_cfg(struct ata_port *ap, struct mv_host_priv *hpriv,
@@ -1752,26 +1756,30 @@ static unsigned int mv5_scr_offset(unsigned int sc_reg_in)
 	return ofs;
 }
 
-static u32 mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
+static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val)
 {
 	void __iomem *mmio = ap->host->iomap[MV_PRIMARY_BAR];
 	void __iomem *addr = mv5_phy_base(mmio, ap->port_no);
 	unsigned int ofs = mv5_scr_offset(sc_reg_in);
 
-	if (ofs != 0xffffffffU)
-		return readl(addr + ofs);
-	else
-		return (u32) ofs;
+	if (ofs != 0xffffffffU) {
+		*val = readl(addr + ofs);
+		return 0;
+	} else
+		return -EINVAL;
 }
 
-static void mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
+static int mv5_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
 {
 	void __iomem *mmio = ap->host->iomap[MV_PRIMARY_BAR];
 	void __iomem *addr = mv5_phy_base(mmio, ap->port_no);
 	unsigned int ofs = mv5_scr_offset(sc_reg_in);
 
-	if (ofs != 0xffffffffU)
+	if (ofs != 0xffffffffU) {
 		writelfl(val, addr + ofs);
+		return 0;
+	} else
+		return -EINVAL;
 }
 
 static void mv5_reset_bus(struct pci_dev *pdev, void __iomem *mmio)
@@ -2149,9 +2157,17 @@ static void mv_phy_reset(struct ata_port *ap, unsigned int *class,
 
 	VPRINTK("ENTER, port %u, mmio 0x%p\n", ap->port_no, port_mmio);
 
-	DPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x "
-		"SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
-		mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
+#ifdef DEBUG
+	{
+		u32 sstatus, serror, scontrol;
+
+		mv_scr_read(ap, SCR_STATUS, &sstatus);
+		mv_scr_read(ap, SCR_ERROR, &serror);
+		mv_scr_read(ap, SCR_CONTROL, &scontrol);
+		DPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x "
+			"SCtrl 0x%08x\n", status, serror, scontrol);
+	}
+#endif
 
 	/* Issue COMRESET via SControl */
 comreset_retry:
@@ -2175,9 +2191,17 @@ comreset_retry:
 	    (retry-- > 0))
 		goto comreset_retry;
 
-	DPRINTK("S-regs after PHY wake: SStat 0x%08x SErr 0x%08x "
-		"SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
-		mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
+#ifdef DEBUG
+	{
+		u32 sstatus, serror, scontrol;
+
+		mv_scr_read(ap, SCR_STATUS, &sstatus);
+		mv_scr_read(ap, SCR_ERROR, &serror);
+		mv_scr_read(ap, SCR_CONTROL, &scontrol);
+		DPRINTK("S-regs after PHY wake: SStat 0x%08x SErr 0x%08x "
+			"SCtrl 0x%08x\n", sstatus, serror, scontrol);
+	}
+#endif
 
 	if (ata_port_offline(ap)) {
 		*class = ATA_DEV_NONE;
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 5d943da042f..0b58c4df6fd 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -236,8 +236,8 @@ static void nv_ck804_host_stop(struct ata_host *host);
 static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance);
 static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance);
 static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance);
-static u32 nv_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int nv_scr_read (struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
 
 static void nv_nf2_freeze(struct ata_port *ap);
 static void nv_nf2_thaw(struct ata_port *ap);
@@ -1393,20 +1393,22 @@ static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance)
 	return ret;
 }
 
-static u32 nv_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int nv_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return 0xffffffffU;
+		return -EINVAL;
 
-	return ioread32(ap->ioaddr.scr_addr + (sc_reg * 4));
+	*val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
-static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+static int nv_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return;
+		return -EINVAL;
 
 	iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 static void nv_nf2_freeze(struct ata_port *ap)
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index d2fcb9a6bec..d39ebc23c4a 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -128,8 +128,8 @@ struct pdc_port_priv {
 	dma_addr_t		pkt_dma;
 };
 
-static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
 static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 static int pdc_common_port_start(struct ata_port *ap);
 static int pdc_sata_port_start(struct ata_port *ap);
@@ -427,19 +427,20 @@ static int pdc_sata_cable_detect(struct ata_port *ap)
 	return ATA_CBL_SATA;
 }
 
-static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int pdc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return 0xffffffffU;
-	return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+		return -EINVAL;
+	*val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
-static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
-			       u32 val)
+static int pdc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return;
+		return -EINVAL;
 	writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
@@ -642,8 +643,12 @@ static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
 			   | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
 		ac_err_mask |= AC_ERR_HOST_BUS;
 
-	if (sata_scr_valid(ap))
-		ehi->serror |= pdc_sata_scr_read(ap, SCR_ERROR);
+	if (sata_scr_valid(ap)) {
+		u32 serror;
+
+		pdc_sata_scr_read(ap, SCR_ERROR, &serror);
+		ehi->serror |= serror;
+	}
 
 	qc->err_mask |= ac_err_mask;
 
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 5aef4ac3701..c8f9242e7f4 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -111,8 +111,8 @@ struct qs_port_priv {
 	qs_state_t		state;
 };
 
-static u32 qs_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void qs_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int qs_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
 static int qs_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 static int qs_port_start(struct ata_port *ap);
 static void qs_host_stop(struct ata_host *host);
@@ -255,18 +255,20 @@ static void qs_eng_timeout(struct ata_port *ap)
 	ata_eng_timeout(ap);
 }
 
-static u32 qs_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return ~0U;
-	return readl(ap->ioaddr.scr_addr + (sc_reg * 8));
+		return -EINVAL;
+	*val = readl(ap->ioaddr.scr_addr + (sc_reg * 8));
+	return 0;
 }
 
-static void qs_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+static int qs_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return;
+		return -EINVAL;
 	writel(val, ap->ioaddr.scr_addr + (sc_reg * 8));
+	return 0;
 }
 
 static unsigned int qs_fill_sg(struct ata_queued_cmd *qc)
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 2a86dc4598d..db676375895 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -115,8 +115,8 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 static int sil_pci_device_resume(struct pci_dev *pdev);
 #endif
 static void sil_dev_config(struct ata_device *dev);
-static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
 static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed);
 static void sil_freeze(struct ata_port *ap);
 static void sil_thaw(struct ata_port *ap);
@@ -350,19 +350,26 @@ static inline void __iomem *sil_scr_addr(struct ata_port *ap, unsigned int sc_re
 	return NULL;
 }
 
-static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	void __iomem *mmio = sil_scr_addr(ap, sc_reg);
-	if (mmio)
-		return readl(mmio);
-	return 0xffffffffU;
+
+	if (mmio) {
+		*val = readl(mmio);
+		return 0;
+	}
+	return -EINVAL;
 }
 
-static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	void __iomem *mmio = sil_scr_addr(ap, sc_reg);
-	if (mmio)
+
+	if (mmio) {
 		writel(val, mmio);
+		return 0;
+	}
+	return -EINVAL;
 }
 
 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
@@ -378,7 +385,7 @@ static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
 		 * controllers continue to assert IRQ as long as
 		 * SError bits are pending.  Clear SError immediately.
 		 */
-		serror = sil_scr_read(ap, SCR_ERROR);
+		sil_scr_read(ap, SCR_ERROR, &serror);
 		sil_scr_write(ap, SCR_ERROR, serror);
 
 		/* Trigger hotplug and accumulate SError only if the
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index e201f1cab66..46fbbe7f121 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -326,8 +326,8 @@ struct sil24_port_priv {
 
 static void sil24_dev_config(struct ata_device *dev);
 static u8 sil24_check_status(struct ata_port *ap);
-static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg);
-static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
+static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val);
+static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
 static void sil24_qc_prep(struct ata_queued_cmd *qc);
 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
@@ -488,25 +488,30 @@ static int sil24_scr_map[] = {
 	[SCR_ACTIVE]	= 3,
 };
 
-static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg)
+static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
 {
 	void __iomem *scr_addr = ap->ioaddr.scr_addr;
+
 	if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
 		void __iomem *addr;
 		addr = scr_addr + sil24_scr_map[sc_reg] * 4;
-		return readl(scr_addr + sil24_scr_map[sc_reg] * 4);
+		*val = readl(scr_addr + sil24_scr_map[sc_reg] * 4);
+		return 0;
 	}
-	return 0xffffffffU;
+	return -EINVAL;
 }
 
-static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
+static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
 {
 	void __iomem *scr_addr = ap->ioaddr.scr_addr;
+
 	if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
 		void __iomem *addr;
 		addr = scr_addr + sil24_scr_map[sc_reg] * 4;
 		writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
+		return 0;
 	}
+	return -EINVAL;
 }
 
 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index 33716b00c6b..31a2f55aae6 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -64,8 +64,8 @@ enum {
 };
 
 static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
-static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int sis_scr_read (struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
 
 static const struct pci_device_id sis_pci_tbl[] = {
 	{ PCI_VDEVICE(SI, 0x0180), sis_180 },		/* SiS 964/180 */
@@ -207,36 +207,37 @@ static void sis_scr_cfg_write (struct ata_port *ap, unsigned int sc_reg, u32 val
 		pci_write_config_dword(pdev, cfg_addr+0x10, val);
 }
 
-static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
-	u32 val, val2 = 0;
 	u8 pmr;
 
 	if (sc_reg > SCR_CONTROL)
-		return 0xffffffffU;
+		return -EINVAL;
 
 	if (ap->flags & SIS_FLAG_CFGSCR)
 		return sis_scr_cfg_read(ap, sc_reg);
 
 	pci_read_config_byte(pdev, SIS_PMR, &pmr);
 
-	val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4));
+	*val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4));
 
 	if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 	    (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
-		val2 = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4) + 0x10);
+		*val |= ioread32(ap->ioaddr.scr_addr + (sc_reg * 4) + 0x10);
+
+	*val &= 0xfffffffb;
 
-	return (val | val2) &  0xfffffffb;
+	return 0;
 }
 
-static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	u8 pmr;
 
 	if (sc_reg > SCR_CONTROL)
-		return;
+		return -EINVAL;
 
 	pci_read_config_byte(pdev, SIS_PMR, &pmr);
 
@@ -248,6 +249,7 @@ static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
 		    (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 			iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
 	}
+	return 0;
 }
 
 static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index 63fe99afd59..92e87707503 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -103,20 +103,21 @@ static int k2_sata_check_atapi_dma(struct ata_queued_cmd *qc)
 	return 0;
 }
 
-static u32 k2_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int k2_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return 0xffffffffU;
-	return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+		return -EINVAL;
+	*val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 
-static void k2_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
-			       u32 val)
+static int k2_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return;
+		return -EINVAL;
 	writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index b52f83ab056..78c28512f01 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -57,8 +57,8 @@ struct uli_priv {
 };
 
 static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
-static u32 uli_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int uli_scr_read (struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
 
 static const struct pci_device_id uli_pci_tbl[] = {
 	{ PCI_VDEVICE(AL, 0x5289), uli_5289 },
@@ -164,20 +164,22 @@ static void uli_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
 	pci_write_config_dword(pdev, cfg_addr, val);
 }
 
-static u32 uli_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int uli_scr_read (struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return 0xffffffffU;
+		return -EINVAL;
 
-	return uli_scr_cfg_read(ap, sc_reg);
+	*val = uli_scr_cfg_read(ap, sc_reg);
+	return 0;
 }
 
-static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+static int uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	if (sc_reg > SCR_CONTROL)	//SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0
-		return;
+		return -EINVAL;
 
 	uli_scr_cfg_write(ap, sc_reg, val);
+	return 0;
 }
 
 static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index c4124475f75..86b7bfc1732 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -72,8 +72,8 @@ enum {
 };
 
 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
-static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
-static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
+static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
 static void svia_noop_freeze(struct ata_port *ap);
 static void vt6420_error_handler(struct ata_port *ap);
 static int vt6421_pata_cable_detect(struct ata_port *ap);
@@ -249,18 +249,20 @@ MODULE_LICENSE("GPL");
 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
 MODULE_VERSION(DRV_VERSION);
 
-static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return 0xffffffffU;
-	return ioread32(ap->ioaddr.scr_addr + (4 * sc_reg));
+		return -EINVAL;
+	*val = ioread32(ap->ioaddr.scr_addr + (4 * sc_reg));
+	return 0;
 }
 
-static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return;
+		return -EINVAL;
 	iowrite32(val, ap->ioaddr.scr_addr + (4 * sc_reg));
+	return 0;
 }
 
 static void svia_noop_freeze(struct ata_port *ap)
@@ -305,18 +307,19 @@ static int vt6420_prereset(struct ata_port *ap, unsigned long deadline)
 
 	/* Resume phy.  This is the old SATA resume sequence */
 	svia_scr_write(ap, SCR_CONTROL, 0x300);
-	svia_scr_read(ap, SCR_CONTROL); /* flush */
+	svia_scr_read(ap, SCR_CONTROL, &scontrol); /* flush */
 
 	/* wait for phy to become ready, if necessary */
 	do {
 		msleep(200);
-		if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
+		svia_scr_read(ap, SCR_STATUS, &sstatus);
+		if ((sstatus & 0xf) != 1)
 			break;
 	} while (time_before(jiffies, timeout));
 
 	/* open code sata_print_link_status() */
-	sstatus = svia_scr_read(ap, SCR_STATUS);
-	scontrol = svia_scr_read(ap, SCR_CONTROL);
+	svia_scr_read(ap, SCR_STATUS, &sstatus);
+	svia_scr_read(ap, SCR_CONTROL, &scontrol);
 
 	online = (sstatus & 0xf) == 0x3;
 
@@ -325,7 +328,7 @@ static int vt6420_prereset(struct ata_port *ap, unsigned long deadline)
 			online ? "up" : "down", sstatus, scontrol);
 
 	/* SStatus is read one more time */
-	svia_scr_read(ap, SCR_STATUS);
+	svia_scr_read(ap, SCR_STATUS, &sstatus);
 
 	if (!online) {
 		/* tell EH to bail */
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index 1b5d81faa10..24344d0d057 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -98,20 +98,21 @@ enum {
 			      VSC_SATA_INT_PHY_CHANGE),
 };
 
-static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
+static int vsc_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return 0xffffffffU;
-	return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+		return -EINVAL;
+	*val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 
-static void vsc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
-			       u32 val)
+static int vsc_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 {
 	if (sc_reg > SCR_CONTROL)
-		return;
+		return -EINVAL;
 	writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
+	return 0;
 }
 
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index cb181713d9b..c732b3e78e2 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -620,9 +620,8 @@ struct ata_port_operations {
 	u8 (*irq_on) (struct ata_port *);
 	u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
 
-	u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
-	void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
-			   u32 val);
+	int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
+	int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
 
 	int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
 	int (*port_resume) (struct ata_port *ap);
-- 
cgit v1.2.3-70-g09d2


From 274c1fde5c775a53331427d454745b9ecc5c783b Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:40 +0900
Subject: ahci: make NO_NCQ handling more consistent

ahci_save_initial_config() is responsible for reading, screening the
host CAP register and storing the modified result into hpriv->cap for
the rest of the driver.  Move ATA_FLAG_NO_NCQ handling into
ahci_save_initial_config().  It's more consistent this way and the
rest of the driver can always refer to hpriv->cap to determine
configured capability.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index e044d6477a0..9475e5619af 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -545,13 +545,19 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
 	hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
 	hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
 
-	/* some chips lie about 64bit support */
+	/* some chips have errata preventing 64bit use */
 	if ((cap & HOST_CAP_64) && (pi->flags & AHCI_FLAG_32BIT_ONLY)) {
 		dev_printk(KERN_INFO, &pdev->dev,
 			   "controller can't do 64bit DMA, forcing 32bit\n");
 		cap &= ~HOST_CAP_64;
 	}
 
+	if ((cap & HOST_CAP_NCQ) && (pi->flags & AHCI_FLAG_NO_NCQ)) {
+		dev_printk(KERN_INFO, &pdev->dev,
+			   "controller can't do NCQ, turning off CAP_NCQ\n");
+		cap &= ~HOST_CAP_NCQ;
+	}
+
 	/* fixup zero port_map */
 	if (!port_map) {
 		port_map = (1 << ahci_nr_ports(cap)) - 1;
@@ -1822,7 +1828,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	ahci_save_initial_config(pdev, &pi, hpriv);
 
 	/* prepare host */
-	if (!(pi.flags & AHCI_FLAG_NO_NCQ) && (hpriv->cap & HOST_CAP_NCQ))
+	if (hpriv->cap & HOST_CAP_NCQ)
 		pi.flags |= ATA_FLAG_NCQ;
 
 	host = ata_host_alloc_pinfo(&pdev->dev, ppi, fls(hpriv->port_map));
-- 
cgit v1.2.3-70-g09d2


From 203ef6c456ad70e660cca67921d3d872b13aa516 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:40 +0900
Subject: ahci: implement SCR_NOTIFICATION r/w

Make ahci_scr_read/write() handle SCR_NOTIFICATION if the controller
supports it.  Also, print "sntf" in the cap line if supported.

While at it, convert eight space into a tab in ahci_print_info().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 68 +++++++++++++++++++++++++++++-------------------------
 1 file changed, 37 insertions(+), 31 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 9475e5619af..de8bffbf4bd 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -99,6 +99,7 @@ enum {
 	HOST_CAP_SSC		= (1 << 14), /* Slumber capable */
 	HOST_CAP_CLO		= (1 << 24), /* Command List Override support */
 	HOST_CAP_SSS		= (1 << 27), /* Staggered Spin-up */
+	HOST_CAP_SNTF		= (1 << 29), /* SNotification register */
 	HOST_CAP_NCQ		= (1 << 30), /* Native Command Queueing */
 	HOST_CAP_64		= (1 << 31), /* PCI DAC (64-bit DMA) support */
 
@@ -113,11 +114,11 @@ enum {
 	PORT_TFDATA		= 0x20,	/* taskfile data */
 	PORT_SIG		= 0x24,	/* device TF signature */
 	PORT_CMD_ISSUE		= 0x38, /* command issue */
-	PORT_SCR		= 0x28, /* SATA phy register block */
 	PORT_SCR_STAT		= 0x28, /* SATA phy register: SStatus */
 	PORT_SCR_CTL		= 0x2c, /* SATA phy register: SControl */
 	PORT_SCR_ERR		= 0x30, /* SATA phy register: SError */
 	PORT_SCR_ACT		= 0x34, /* SATA phy register: SActive */
+	PORT_SCR_NTF		= 0x3c, /* SATA phy register: SNotification */
 
 	/* PORT_IRQ_{STAT,MASK} bits */
 	PORT_IRQ_COLD_PRES	= (1 << 31), /* cold presence detect */
@@ -631,39 +632,45 @@ static void ahci_restore_initial_config(struct ata_host *host)
 	(void) readl(mmio + HOST_PORTS_IMPL);	/* flush */
 }
 
-static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val)
+static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
 {
-	unsigned int sc_reg;
-
-	switch (sc_reg_in) {
-	case SCR_STATUS:	sc_reg = 0; break;
-	case SCR_CONTROL:	sc_reg = 1; break;
-	case SCR_ERROR:		sc_reg = 2; break;
-	case SCR_ACTIVE:	sc_reg = 3; break;
-	default:
-		return -EINVAL;
-	}
+	static const int offset[] = {
+		[SCR_STATUS]		= PORT_SCR_STAT,
+		[SCR_CONTROL]		= PORT_SCR_CTL,
+		[SCR_ERROR]		= PORT_SCR_ERR,
+		[SCR_ACTIVE]		= PORT_SCR_ACT,
+		[SCR_NOTIFICATION]	= PORT_SCR_NTF,
+	};
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 
-	*val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
+	if (sc_reg < ARRAY_SIZE(offset) &&
+	    (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
+		return offset[sc_reg];
 	return 0;
 }
 
-
-static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
+static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 {
-	unsigned int sc_reg;
-
-	switch (sc_reg_in) {
-	case SCR_STATUS:	sc_reg = 0; break;
-	case SCR_CONTROL:	sc_reg = 1; break;
-	case SCR_ERROR:		sc_reg = 2; break;
-	case SCR_ACTIVE:	sc_reg = 3; break;
-	default:
-		return -EINVAL;
+	void __iomem *port_mmio = ahci_port_base(ap);
+	int offset = ahci_scr_offset(ap, sc_reg);
+
+	if (offset) {
+		*val = readl(port_mmio + offset);
+		return 0;
 	}
+	return -EINVAL;
+}
 
-	writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
-	return 0;
+static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
+{
+	void __iomem *port_mmio = ahci_port_base(ap);
+	int offset = ahci_scr_offset(ap, sc_reg);
+
+	if (offset) {
+		writel(val, port_mmio + offset);
+		return 0;
+	}
+	return -EINVAL;
 }
 
 static void ahci_start_engine(struct ata_port *ap)
@@ -1768,12 +1775,13 @@ static void ahci_print_info(struct ata_host *host)
 
 	dev_printk(KERN_INFO, &pdev->dev,
 		"flags: "
-	       	"%s%s%s%s%s%s"
-	       	"%s%s%s%s%s%s%s\n"
+		"%s%s%s%s%s%s%s"
+		"%s%s%s%s%s%s%s\n"
 	       	,
 
 		cap & (1 << 31) ? "64bit " : "",
 		cap & (1 << 30) ? "ncq " : "",
+		cap & (1 << 29) ? "sntf " : "",
 		cap & (1 << 28) ? "ilck " : "",
 		cap & (1 << 27) ? "stag " : "",
 		cap & (1 << 26) ? "pm " : "",
@@ -1842,10 +1850,8 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		void __iomem *port_mmio = ahci_port_base(ap);
 
 		/* standard SATA port setup */
-		if (hpriv->port_map & (1 << i)) {
+		if (hpriv->port_map & (1 << i))
 			ap->ioaddr.cmd_addr = port_mmio;
-			ap->ioaddr.scr_addr = port_mmio + PORT_SCR;
-		}
 
 		/* disabled/not-implemented port */
 		else
-- 
cgit v1.2.3-70-g09d2


From badc2341579511a247f5993865aa68379e283c5c Mon Sep 17 00:00:00 2001
From: su henry <henry.su.ati@gmail.com>
Date: Fri, 20 Jul 2007 08:07:46 -0400
Subject: The SATA controller device ID is different according to the onchip
 SATA type set in the system BIOS: Device                              Device
 ID SATA in IDE mode             0x4390 SATA in AHCI mode           0x4391
 SATA in non-raid5 driver     0x4392 SATA in raid5 driver           0x4393

Although the device ID is different, they use the same AHCI driver
.The attached file is the patch for adding these device
IDs for ATI SB700.

Signed-off-by: henry.su.ati@gmail.com
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index de8bffbf4bd..06f212ff2b4 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -418,7 +418,10 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 
 	/* ATI */
 	{ PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
-	{ PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700 */
+	{ PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700 IDE */
+	{ PCI_VDEVICE(ATI, 0x4391), board_ahci_sb600 }, /* ATI SB700 AHCI */
+	{ PCI_VDEVICE(ATI, 0x4392), board_ahci_sb600 }, /* ATI SB700 nraid5 */
+	{ PCI_VDEVICE(ATI, 0x4393), board_ahci_sb600 }, /* ATI SB700 raid5 */
 
 	/* VIA */
 	{ PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
-- 
cgit v1.2.3-70-g09d2


From 008a78961ec72990d09d7625ef9499d7317d040d Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:40 +0900
Subject: libata: improve SATA PHY speed down logic

sata_down_spd_limit() first reads the current SPD from SStatus and
limit the speed to the lower one of one below the current limit or one
below the current SPD in SStatus.  SPD may not be accessible or valid
when SPD down is requested making sata_down_spd_limit() fail when it's
most needed.

This patch makes the current SPD cached after each successful reset
and forces GEN I speed (1.5Gbps) if neither of SStatus or the cached
value is valid, so sata_down_spd_limit() is now guaranteed to lower
the speed limit if lower speed is available.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 29 ++++++++++++++++++++++-------
 drivers/ata/libata-eh.c   |  6 ++++++
 include/linux/libata.h    |  1 +
 3 files changed, 29 insertions(+), 7 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 5718c247e23..c325b7a4246 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2389,21 +2389,35 @@ int sata_down_spd_limit(struct ata_port *ap)
 	u32 sstatus, spd, mask;
 	int rc, highbit;
 
+	if (!sata_scr_valid(ap))
+		return -EOPNOTSUPP;
+
+	/* If SCR can be read, use it to determine the current SPD.
+	 * If not, use cached value in ap->sata_spd.
+	 */
 	rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
-	if (rc)
-		return rc;
+	if (rc == 0)
+		spd = (sstatus >> 4) & 0xf;
+	else
+		spd = ap->sata_spd;
 
 	mask = ap->sata_spd_limit;
 	if (mask <= 1)
 		return -EINVAL;
+
+	/* unconditionally mask off the highest bit */
 	highbit = fls(mask) - 1;
 	mask &= ~(1 << highbit);
 
-	spd = (sstatus >> 4) & 0xf;
-	if (spd <= 1)
-		return -EINVAL;
-	spd--;
-	mask &= (1 << spd) - 1;
+	/* Mask off all speeds higher than or equal to the current
+	 * one.  Force 1.5Gbps if current SPD is not available.
+	 */
+	if (spd > 1)
+		mask &= (1 << (spd - 1)) - 1;
+	else
+		mask &= 1;
+
+	/* were we already at the bottom? */
 	if (!mask)
 		return -EINVAL;
 
@@ -5995,6 +6009,7 @@ void ata_dev_init(struct ata_device *dev)
 
 	/* SATA spd limit is bound to the first device */
 	ap->sata_spd_limit = ap->hw_sata_spd_limit;
+	ap->sata_spd = 0;
 
 	/* High bits of dev->flags are used to record warm plug
 	 * requests which occur asynchronously.  Synchronize using
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 19f9947bd96..183eaf466d4 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1799,12 +1799,18 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 	}
 
 	if (rc == 0) {
+		u32 sstatus;
+
 		/* After the reset, the device state is PIO 0 and the
 		 * controller state is undefined.  Record the mode.
 		 */
 		for (i = 0; i < ATA_MAX_DEVICES; i++)
 			ap->device[i].pio_mode = XFER_PIO_0;
 
+		/* record current link speed */
+		if (sata_scr_read(ap, SCR_STATUS, &sstatus) == 0)
+			ap->sata_spd = (sstatus >> 4) & 0xf;
+
 		if (postreset)
 			postreset(ap, classes);
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index c732b3e78e2..16ebdf152c7 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -531,6 +531,7 @@ struct ata_port {
 	unsigned int		cbl;	/* cable type; ATA_CBL_xxx */
 	unsigned int		hw_sata_spd_limit;
 	unsigned int		sata_spd_limit;	/* SATA PHY speed limit */
+	unsigned int		sata_spd;	/* current SATA PHY speed */
 
 	/* record runtime error info, protected by host lock */
 	struct ata_eh_info	eh_info;
-- 
cgit v1.2.3-70-g09d2


From f1545154a5c96590b1992aac8ee1e2c445e301ed Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:40 +0900
Subject: libata: quickly trigger SATA SPD down after debouncing failed

Debouncing failure is a good indicator of basic link problem.  Use
-EPIPE to indicate debouncing failure and make ata_eh_reset() invoke
sata_down_spd_limit() if the error occurs during reset.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 6 ++++--
 drivers/ata/libata-eh.c   | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c325b7a4246..05922e9f4fa 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3267,9 +3267,11 @@ int sata_phy_debounce(struct ata_port *ap, const unsigned long *params,
 		last = cur;
 		last_jiffies = jiffies;
 
-		/* check deadline */
+		/* Check deadline.  If debouncing failed, return
+		 * -EPIPE to tell upper layer to lower link speed.
+		 */
 		if (time_after(jiffies, deadline))
-			return -EBUSY;
+			return -EPIPE;
 	}
 }
 
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 183eaf466d4..1a4397ae9e4 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1790,7 +1790,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			schedule_timeout_uninterruptible(delta);
 		}
 
-		if (reset == hardreset &&
+		if (rc == -EPIPE ||
 		    try == ARRAY_SIZE(ata_eh_reset_timeouts) - 1)
 			sata_down_spd_limit(ap);
 		if (hardreset)
-- 
cgit v1.2.3-70-g09d2


From 1ae463171cc1b1ea6dad7bcb298e96c073e7373e Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:40 +0900
Subject: libata: improve SCSI scan failure handling

SCSI scan may fail due to memory allocation failure even if EH is not
in progress.  Due to use of GFP_ATOMIC in SCSI scan path, allocation
failure isn't too rare especially while probing multiple devices at
once which is the case when a bunch of devices are connected to PMP.

This patch moves SCSI scan failure detetion logic from
ata_scsi_hotplug() to ata_scsi_scan_host() and implement synchronous
scan behavior.  The synchronous path sleeps briefly and repeats SCSI
scan if some devices aren't attached properly.  It contains robust
retry loop to minimize the chance of device misdetection during boot
and falls back to async retry if everything fails.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c |  2 +-
 drivers/ata/libata-scsi.c | 63 +++++++++++++++++++++++++++++++++++------------
 drivers/ata/libata.h      |  2 +-
 3 files changed, 49 insertions(+), 18 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 05922e9f4fa..35b62129383 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6453,7 +6453,7 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 	for (i = 0; i < host->n_ports; i++) {
 		struct ata_port *ap = host->ports[i];
 
-		ata_scsi_scan_host(ap);
+		ata_scsi_scan_host(ap, 1);
 	}
 
 	return 0;
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index cfde22da07a..12ac0b511f7 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2947,17 +2947,22 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
 	return rc;
 }
 
-void ata_scsi_scan_host(struct ata_port *ap)
+void ata_scsi_scan_host(struct ata_port *ap, int sync)
 {
+	int tries = 5;
+	struct ata_device *last_failed_dev = NULL;
+	struct ata_device *dev;
 	unsigned int i;
 
 	if (ap->flags & ATA_FLAG_DISABLED)
 		return;
 
+ repeat:
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
 		struct scsi_device *sdev;
 
+		dev = &ap->device[i];
+
 		if (!ata_dev_enabled(dev) || dev->sdev)
 			continue;
 
@@ -2967,6 +2972,45 @@ void ata_scsi_scan_host(struct ata_port *ap)
 			scsi_device_put(sdev);
 		}
 	}
+
+	/* If we scanned while EH was in progress or allocation
+	 * failure occurred, scan would have failed silently.  Check
+	 * whether all devices are attached.
+	 */
+	for (i = 0; i < ATA_MAX_DEVICES; i++) {
+		dev = &ap->device[i];
+		if (ata_dev_enabled(dev) && !dev->sdev)
+			break;
+	}
+	if (i == ATA_MAX_DEVICES)
+		return;
+
+	/* we're missing some SCSI devices */
+	if (sync) {
+		/* If caller requested synchrnous scan && we've made
+		 * any progress, sleep briefly and repeat.
+		 */
+		if (dev != last_failed_dev) {
+			msleep(100);
+			last_failed_dev = dev;
+			goto repeat;
+		}
+
+		/* We might be failing to detect boot device, give it
+		 * a few more chances.
+		 */
+		if (--tries) {
+			msleep(100);
+			goto repeat;
+		}
+
+		ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
+				"failed without making any progress,\n"
+				"                  switching to async\n");
+	}
+
+	queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
+			   round_jiffies_relative(HZ));
 }
 
 /**
@@ -3093,20 +3137,7 @@ void ata_scsi_hotplug(struct work_struct *work)
 	}
 
 	/* scan for new ones */
-	ata_scsi_scan_host(ap);
-
-	/* If we scanned while EH was in progress, scan would have
-	 * failed silently.  Requeue if there are enabled but
-	 * unattached devices.
-	 */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
-		if (ata_dev_enabled(dev) && !dev->sdev) {
-			queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
-				round_jiffies_relative(HZ));
-			break;
-		}
-	}
+	ata_scsi_scan_host(ap, 0);
 
 	DPRINTK("EXIT\n");
 }
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index ba17fc5f2e9..48836b22ce2 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -112,7 +112,7 @@ static inline int ata_acpi_on_devcfg(struct ata_device *adev) { return 0; }
 /* libata-scsi.c */
 extern int ata_scsi_add_hosts(struct ata_host *host,
 			      struct scsi_host_template *sht);
-extern void ata_scsi_scan_host(struct ata_port *ap);
+extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
 extern int ata_scsi_offline_dev(struct ata_device *dev);
 extern void ata_scsi_hotplug(struct work_struct *work);
 extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
-- 
cgit v1.2.3-70-g09d2


From fccb6ea5c240b9f29baa55448488fd6aee49f5a5 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:41 +0900
Subject: libata: clear HOTPLUG flag after a reset

ATA_EHI_HOTPLUGGED is a hint for reset functions indicating the the
port might have gone through hotplug/unplug just before entering EH.
Reset functions modify their behaviors a bit to handle the situation
better - e.g. using longer debouncing delay.

Currently, once HOTPLUG is set, it isn't cleared till the end of EH.
This is unnecessary and makes EH take longer.  Clear the HOTPLUGGED
flag after a reset try (successful or not).

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 1a4397ae9e4..a5a8f845306 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1714,7 +1714,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			} else
 				ata_port_printk(ap, KERN_ERR,
 					"prereset failed (errno=%d)\n", rc);
-			return rc;
+			goto out;
 		}
 	}
 
@@ -1727,7 +1727,8 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		/* prereset told us not to reset, bang classes and return */
 		for (i = 0; i < ATA_MAX_DEVICES; i++)
 			classes[i] = ATA_DEV_NONE;
-		return 0;
+		rc = 0;
+		goto out;
 	}
 
 	/* did prereset() screw up?  if so, fix up to avoid oopsing */
@@ -1763,7 +1764,8 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			ata_port_printk(ap, KERN_ERR,
 					"follow-up softreset required "
 					"but no softreset avaliable\n");
-			return -EINVAL;
+			rc = -EINVAL;
+			goto out;
 		}
 
 		ata_eh_about_to_do(ap, NULL, ATA_EH_RESET_MASK);
@@ -1773,7 +1775,8 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		    classes[0] == ATA_DEV_UNKNOWN) {
 			ata_port_printk(ap, KERN_ERR,
 					"classification failed\n");
-			return -EINVAL;
+			rc = -EINVAL;
+			goto out;
 		}
 	}
 
@@ -1818,7 +1821,9 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		ata_eh_done(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);
 		ehc->i.action |= ATA_EH_REVALIDATE;
 	}
-
+ out:
+	/* clear hotplug flag */
+	ehc->i.flags &= ~ATA_EHI_HOTPLUGGED;
 	return rc;
 }
 
-- 
cgit v1.2.3-70-g09d2


From 4e57c517b3cbaceb7438eeec879ca129fc17442c Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:41 +0900
Subject: libata: schedule probing after SError access failure during autopsy

If SError isn't accessible, EH can't tell whether hotplug has happened
or not.  Report SError read failure with AC_ERR_OTHER and schedule
probing with hardreset.  This will be mainly useful for PMPs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index a5a8f845306..e7e2ba24ce6 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1478,8 +1478,12 @@ static void ata_eh_autopsy(struct ata_port *ap)
 	if (rc == 0) {
 		ehc->i.serror |= serror;
 		ata_eh_analyze_serror(ap);
-	} else if (rc != -EOPNOTSUPP)
+	} else if (rc != -EOPNOTSUPP) {
+		/* SError read failed, force hardreset and probing */
+		ata_ehi_schedule_probe(&ehc->i);
 		ehc->i.action |= ATA_EH_HARDRESET;
+		ehc->i.err_mask |= AC_ERR_OTHER;
+	}
 
 	/* analyze NCQ failure */
 	ata_eh_analyze_ncq_error(ap);
-- 
cgit v1.2.3-70-g09d2


From 5ddf24c5ea9d715dc4f5d5d5dd1c9337d90466dc Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 16 Jul 2007 14:29:41 +0900
Subject: libata: implement EH fast drain

In most cases, when EH is scheduled, all in-flight commands are
aborted causing EH to kick in immediately.  However, in some cases
(especially with PMP), it's unclear which commands are affected by the
error condition and although aborting all in-flight commands work, it
isn't optimal and may cause unnecessary disruption.  On the other
hand, waiting for in-flight commands to drain themselves can take up
to 30seconds.

This patch implements EH fast drain to handle such situations.  It
gives in-flight commands some time to finish up but doesn't wait for
too long.  After EH is scheduled, fast drain timer is started and if
no other completion occurs in ATA_EH_FASTDRAIN_INTERVAL all in-flight
commands are aborted.  If any completion occurred in the interval, the
port is given another interval to finish up itself.

Currently ATA_EH_FASTDRAIN_INTERVAL is 3 secs which should be enough
for finishing up most commands.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c |  3 ++
 drivers/ata/libata-eh.c   | 99 ++++++++++++++++++++++++++++++++++++++++++++++-
 drivers/ata/libata.h      |  1 +
 include/linux/libata.h    |  3 ++
 4 files changed, 104 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 35b62129383..6001aae0b88 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6077,6 +6077,9 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 	INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
 	INIT_LIST_HEAD(&ap->eh_done_q);
 	init_waitqueue_head(&ap->eh_wait_q);
+	init_timer_deferrable(&ap->fastdrain_timer);
+	ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
+	ap->fastdrain_timer.data = (unsigned long)ap;
 
 	ap->cbl = ATA_CBL_NONE;
 
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index e7e2ba24ce6..ac6ceed4bb6 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -56,6 +56,7 @@ enum {
  */
 enum {
 	ATA_EH_PRERESET_TIMEOUT		= 10 * HZ,
+	ATA_EH_FASTDRAIN_INTERVAL	= 3 * HZ,
 };
 
 /* The following table determines how we sequence resets.  Each entry
@@ -361,6 +362,9 @@ void ata_scsi_error(struct Scsi_Host *host)
  repeat:
 	/* invoke error handler */
 	if (ap->ops->error_handler) {
+		/* kill fast drain timer */
+		del_timer_sync(&ap->fastdrain_timer);
+
 		/* process port resume request */
 		ata_eh_handle_port_resume(ap);
 
@@ -576,6 +580,94 @@ void ata_eng_timeout(struct ata_port *ap)
 	DPRINTK("EXIT\n");
 }
 
+static int ata_eh_nr_in_flight(struct ata_port *ap)
+{
+	unsigned int tag;
+	int nr = 0;
+
+	/* count only non-internal commands */
+	for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++)
+		if (ata_qc_from_tag(ap, tag))
+			nr++;
+
+	return nr;
+}
+
+void ata_eh_fastdrain_timerfn(unsigned long arg)
+{
+	struct ata_port *ap = (void *)arg;
+	unsigned long flags;
+	int cnt;
+
+	spin_lock_irqsave(ap->lock, flags);
+
+	cnt = ata_eh_nr_in_flight(ap);
+
+	/* are we done? */
+	if (!cnt)
+		goto out_unlock;
+
+	if (cnt == ap->fastdrain_cnt) {
+		unsigned int tag;
+
+		/* No progress during the last interval, tag all
+		 * in-flight qcs as timed out and freeze the port.
+		 */
+		for (tag = 0; tag < ATA_MAX_QUEUE - 1; tag++) {
+			struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag);
+			if (qc)
+				qc->err_mask |= AC_ERR_TIMEOUT;
+		}
+
+		ata_port_freeze(ap);
+	} else {
+		/* some qcs have finished, give it another chance */
+		ap->fastdrain_cnt = cnt;
+		ap->fastdrain_timer.expires =
+			jiffies + ATA_EH_FASTDRAIN_INTERVAL;
+		add_timer(&ap->fastdrain_timer);
+	}
+
+ out_unlock:
+	spin_unlock_irqrestore(ap->lock, flags);
+}
+
+/**
+ *	ata_eh_set_pending - set ATA_PFLAG_EH_PENDING and activate fast drain
+ *	@ap: target ATA port
+ *	@fastdrain: activate fast drain
+ *
+ *	Set ATA_PFLAG_EH_PENDING and activate fast drain if @fastdrain
+ *	is non-zero and EH wasn't pending before.  Fast drain ensures
+ *	that EH kicks in in timely manner.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ */
+static void ata_eh_set_pending(struct ata_port *ap, int fastdrain)
+{
+	int cnt;
+
+	/* already scheduled? */
+	if (ap->pflags & ATA_PFLAG_EH_PENDING)
+		return;
+
+	ap->pflags |= ATA_PFLAG_EH_PENDING;
+
+	if (!fastdrain)
+		return;
+
+	/* do we have in-flight qcs? */
+	cnt = ata_eh_nr_in_flight(ap);
+	if (!cnt)
+		return;
+
+	/* activate fast drain */
+	ap->fastdrain_cnt = cnt;
+	ap->fastdrain_timer.expires = jiffies + ATA_EH_FASTDRAIN_INTERVAL;
+	add_timer(&ap->fastdrain_timer);
+}
+
 /**
  *	ata_qc_schedule_eh - schedule qc for error handling
  *	@qc: command to schedule error handling for
@@ -593,7 +685,7 @@ void ata_qc_schedule_eh(struct ata_queued_cmd *qc)
 	WARN_ON(!ap->ops->error_handler);
 
 	qc->flags |= ATA_QCFLAG_FAILED;
-	qc->ap->pflags |= ATA_PFLAG_EH_PENDING;
+	ata_eh_set_pending(ap, 1);
 
 	/* The following will fail if timeout has already expired.
 	 * ata_scsi_error() takes care of such scmds on EH entry.
@@ -620,7 +712,7 @@ void ata_port_schedule_eh(struct ata_port *ap)
 	if (ap->pflags & ATA_PFLAG_INITIALIZING)
 		return;
 
-	ap->pflags |= ATA_PFLAG_EH_PENDING;
+	ata_eh_set_pending(ap, 1);
 	scsi_schedule_eh(ap->scsi_host);
 
 	DPRINTK("port EH scheduled\n");
@@ -644,6 +736,9 @@ int ata_port_abort(struct ata_port *ap)
 
 	WARN_ON(!ap->ops->error_handler);
 
+	/* we're gonna abort all commands, no need for fast drain */
+	ata_eh_set_pending(ap, 0);
+
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
 		struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag);
 
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 48836b22ce2..564cd234c80 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -151,6 +151,7 @@ extern int ata_bus_probe(struct ata_port *ap);
 extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 extern void ata_scsi_error(struct Scsi_Host *host);
 extern void ata_port_wait_eh(struct ata_port *ap);
+extern void ata_eh_fastdrain_timerfn(unsigned long arg);
 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
 
 /* libata-sff.c */
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 74800ad6d81..be5a43928c8 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -565,6 +565,9 @@ struct ata_port {
 	pm_message_t		pm_mesg;
 	int			*pm_result;
 
+	struct timer_list	fastdrain_timer;
+	unsigned long		fastdrain_cnt;
+
 	void			*private_data;
 
 #ifdef CONFIG_ATA_ACPI
-- 
cgit v1.2.3-70-g09d2


From 8c6b065b792061c2e471d530127f2348fd9d243d Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Fri, 20 Jul 2007 15:36:31 +0100
Subject: pata_cs5520: Fix probe bug regression introduced in 2.6.22

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linux Torvalds <torvalds@linux-foundation.org>
---
 drivers/ata/pata_cs5520.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index 6bf037d82b5..7dc76e71bd5 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -275,7 +275,7 @@ static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_devi
 
 	for (i = 0; i < 2; i++) {
 		static const int irq[] = { 14, 15 };
-		struct ata_port *ap = host->ports[0];
+		struct ata_port *ap = host->ports[i];
 
 		if (ata_port_is_dummy(ap))
 			continue;
-- 
cgit v1.2.3-70-g09d2


From 165125e1e480f9510a5ffcfbfee4e3ee38c05f23 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 24 Jul 2007 09:28:11 +0200
Subject: [BLOCK] Get rid of request_queue_t typedef

Some of the code has been gradually transitioned to using the proper
struct request_queue, but there's lots left. So do a full sweet of
the kernel and get rid of this typedef and replace its uses with
the proper type.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
 Documentation/block/barrier.txt     |   6 +-
 Documentation/block/biodoc.txt      |  10 +-
 Documentation/block/request.txt     |   2 +-
 Documentation/iostats.txt           |   2 +-
 arch/arm/plat-omap/mailbox.c        |   8 +-
 arch/um/drivers/ubd_kern.c          |   4 +-
 block/as-iosched.c                  |  26 +++--
 block/blktrace.c                    |  10 +-
 block/bsg.c                         |  12 +-
 block/cfq-iosched.c                 |  39 +++----
 block/deadline-iosched.c            |  18 +--
 block/elevator.c                    |  75 +++++++------
 block/ll_rw_blk.c                   | 215 +++++++++++++++++++-----------------
 block/noop-iosched.c                |  14 +--
 block/scsi_ioctl.c                  |  24 ++--
 drivers/acorn/block/fd1772.c        |   4 +-
 drivers/acorn/block/mfmhd.c         |   2 +-
 drivers/ata/libata-scsi.c           |   2 +-
 drivers/block/amiflop.c             |   2 +-
 drivers/block/aoe/aoe.h             |   2 +-
 drivers/block/aoe/aoeblk.c          |   2 +-
 drivers/block/ataflop.c             |   2 +-
 drivers/block/cciss.c               |  10 +-
 drivers/block/cpqarray.c            |   6 +-
 drivers/block/floppy.c              |   4 +-
 drivers/block/lguest_blk.c          |   2 +-
 drivers/block/loop.c                |   4 +-
 drivers/block/nbd.c                 |   4 +-
 drivers/block/paride/pcd.c          |   4 +-
 drivers/block/paride/pd.c           |   2 +-
 drivers/block/paride/pf.c           |   4 +-
 drivers/block/pktcdvd.c             |  12 +-
 drivers/block/ps2esdi.c             |   4 +-
 drivers/block/ps3disk.c             |   8 +-
 drivers/block/rd.c                  |   2 +-
 drivers/block/sunvdc.c              |   2 +-
 drivers/block/swim3.c               |   4 +-
 drivers/block/sx8.c                 |  20 ++--
 drivers/block/ub.c                  |   6 +-
 drivers/block/umem.c                |   6 +-
 drivers/block/viodasd.c             |   2 +-
 drivers/block/xd.c                  |   2 +-
 drivers/block/xd.h                  |   2 +-
 drivers/block/xen-blkfront.c        |   4 +-
 drivers/block/xsysace.c             |   4 +-
 drivers/block/z2ram.c               |   2 +-
 drivers/cdrom/cdrom.c               |   2 +-
 drivers/cdrom/viocd.c               |   2 +-
 drivers/ide/ide-cd.c                |   4 +-
 drivers/ide/ide-disk.c              |   4 +-
 drivers/ide/ide-io.c                |   2 +-
 drivers/ide/ide-probe.c             |   2 +-
 drivers/ide/legacy/hd.c             |   2 +-
 drivers/md/dm-table.c               |   8 +-
 drivers/md/dm.c                     |  10 +-
 drivers/md/faulty.c                 |   2 +-
 drivers/md/linear.c                 |  14 +--
 drivers/md/md.c                     |   2 +-
 drivers/md/multipath.c              |  12 +-
 drivers/md/raid0.c                  |  14 +--
 drivers/md/raid1.c                  |  12 +-
 drivers/md/raid10.c                 |  14 +--
 drivers/md/raid5.c                  |  18 +--
 drivers/message/i2o/i2o_block.c     |   4 +-
 drivers/mmc/card/queue.c            |   8 +-
 drivers/s390/block/dasd.c           |   4 +-
 drivers/s390/block/dasd_int.h       |   2 +-
 drivers/s390/block/dcssblk.c        |   2 +-
 drivers/s390/block/xpram.c          |   2 +-
 drivers/s390/char/tape.h            |   2 +-
 drivers/s390/char/tape_block.c      |   4 +-
 drivers/sbus/char/jsflash.c         |   2 +-
 drivers/scsi/scsi_lib.c             |  12 +-
 drivers/scsi/sd.c                   |   4 +-
 drivers/scsi/sr.c                   |   2 +-
 fs/bio.c                            |  30 ++---
 include/asm-arm/arch-omap/mailbox.h |   2 +-
 include/linux/blkdev.h              | 140 +++++++++++------------
 include/linux/blktrace_api.h        |   2 +-
 include/linux/elevator.h            |  76 ++++++-------
 include/linux/ide.h                 |   4 +-
 include/linux/loop.h                |   2 +-
 include/linux/raid/md_k.h           |   4 +-
 include/scsi/sd.h                   |   2 +-
 mm/bounce.c                         |   4 +-
 85 files changed, 529 insertions(+), 510 deletions(-)

(limited to 'drivers/ata')

diff --git a/Documentation/block/barrier.txt b/Documentation/block/barrier.txt
index 7d279f2f5bb..2c2f24f634e 100644
--- a/Documentation/block/barrier.txt
+++ b/Documentation/block/barrier.txt
@@ -79,9 +79,9 @@ and how to prepare flush requests.  Note that the term 'ordered' is
 used to indicate the whole sequence of performing barrier requests
 including draining and flushing.
 
-typedef void (prepare_flush_fn)(request_queue_t *q, struct request *rq);
+typedef void (prepare_flush_fn)(struct request_queue *q, struct request *rq);
 
-int blk_queue_ordered(request_queue_t *q, unsigned ordered,
+int blk_queue_ordered(struct request_queue *q, unsigned ordered,
 		      prepare_flush_fn *prepare_flush_fn);
 
 @q			: the queue in question
@@ -92,7 +92,7 @@ int blk_queue_ordered(request_queue_t *q, unsigned ordered,
 For example, SCSI disk driver's prepare_flush_fn looks like the
 following.
 
-static void sd_prepare_flush(request_queue_t *q, struct request *rq)
+static void sd_prepare_flush(struct request_queue *q, struct request *rq)
 {
 	memset(rq->cmd, 0, sizeof(rq->cmd));
 	rq->cmd_type = REQ_TYPE_BLOCK_PC;
diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt
index 3adaace328a..8af392fc6ef 100644
--- a/Documentation/block/biodoc.txt
+++ b/Documentation/block/biodoc.txt
@@ -740,12 +740,12 @@ Block now offers some simple generic functionality to help support command
 queueing (typically known as tagged command queueing), ie manage more than
 one outstanding command on a queue at any given time.
 
-	blk_queue_init_tags(request_queue_t *q, int depth)
+	blk_queue_init_tags(struct request_queue *q, int depth)
 
 	Initialize internal command tagging structures for a maximum
 	depth of 'depth'.
 
-	blk_queue_free_tags((request_queue_t *q)
+	blk_queue_free_tags((struct request_queue *q)
 
 	Teardown tag info associated with the queue. This will be done
 	automatically by block if blk_queue_cleanup() is called on a queue
@@ -754,7 +754,7 @@ one outstanding command on a queue at any given time.
 The above are initialization and exit management, the main helpers during
 normal operations are:
 
-	blk_queue_start_tag(request_queue_t *q, struct request *rq)
+	blk_queue_start_tag(struct request_queue *q, struct request *rq)
 
 	Start tagged operation for this request. A free tag number between
 	0 and 'depth' is assigned to the request (rq->tag holds this number),
@@ -762,7 +762,7 @@ normal operations are:
 	for this queue is already achieved (or if the tag wasn't started for
 	some other reason), 1 is returned. Otherwise 0 is returned.
 
-	blk_queue_end_tag(request_queue_t *q, struct request *rq)
+	blk_queue_end_tag(struct request_queue *q, struct request *rq)
 
 	End tagged operation on this request. 'rq' is removed from the internal
 	book keeping structures.
@@ -781,7 +781,7 @@ queue. For instance, on IDE any tagged request error needs to clear both
 the hardware and software block queue and enable the driver to sanely restart
 all the outstanding requests. There's a third helper to do that:
 
-	blk_queue_invalidate_tags(request_queue_t *q)
+	blk_queue_invalidate_tags(struct request_queue *q)
 
 	Clear the internal block tag queue and re-add all the pending requests
 	to the request queue. The driver will receive them again on the
diff --git a/Documentation/block/request.txt b/Documentation/block/request.txt
index 75924e2a697..fff58acb40a 100644
--- a/Documentation/block/request.txt
+++ b/Documentation/block/request.txt
@@ -83,6 +83,6 @@ struct bio *bio			DBI	First bio in request
 
 struct bio *biotail		DBI	Last bio in request
 
-request_queue_t *q		DB	Request queue this request belongs to
+struct request_queue *q		DB	Request queue this request belongs to
 
 struct request_list *rl		B	Request list this request came from
diff --git a/Documentation/iostats.txt b/Documentation/iostats.txt
index 09a1bafe252..b963c3b4afa 100644
--- a/Documentation/iostats.txt
+++ b/Documentation/iostats.txt
@@ -79,7 +79,7 @@ Field  8 -- # of milliseconds spent writing
     measured from __make_request() to end_that_request_last()).
 Field  9 -- # of I/Os currently in progress
     The only field that should go to zero. Incremented as requests are
-    given to appropriate request_queue_t and decremented as they finish.
+    given to appropriate struct request_queue and decremented as they finish.
 Field 10 -- # of milliseconds spent doing I/Os
     This field is increases so long as field 9 is nonzero.
 Field 11 -- weighted # of milliseconds spent doing I/Os
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
index de7e6ef48bd..0360b1f14d1 100644
--- a/arch/arm/plat-omap/mailbox.c
+++ b/arch/arm/plat-omap/mailbox.c
@@ -161,11 +161,11 @@ static void mbox_rx_work(struct work_struct *work)
 /*
  * Mailbox interrupt handler
  */
-static void mbox_txq_fn(request_queue_t * q)
+static void mbox_txq_fn(struct request_queue * q)
 {
 }
 
-static void mbox_rxq_fn(request_queue_t * q)
+static void mbox_rxq_fn(struct request_queue * q)
 {
 }
 
@@ -180,7 +180,7 @@ static void __mbox_rx_interrupt(struct omap_mbox *mbox)
 {
 	struct request *rq;
 	mbox_msg_t msg;
-	request_queue_t *q = mbox->rxq->queue;
+	struct request_queue *q = mbox->rxq->queue;
 
 	disable_mbox_irq(mbox, IRQ_RX);
 
@@ -297,7 +297,7 @@ static struct omap_mbox_queue *mbox_queue_alloc(struct omap_mbox *mbox,
 					request_fn_proc * proc,
 					void (*work) (struct work_struct *))
 {
-	request_queue_t *q;
+	struct request_queue *q;
 	struct omap_mbox_queue *mq;
 
 	mq = kzalloc(sizeof(struct omap_mbox_queue), GFP_KERNEL);
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index fc27f6c72b4..aff661fe2ee 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -469,7 +469,7 @@ __uml_help(fakehd,
 "    Change the ubd device name to \"hd\".\n\n"
 );
 
-static void do_ubd_request(request_queue_t * q);
+static void do_ubd_request(struct request_queue * q);
 
 /* Only changed by ubd_init, which is an initcall. */
 int thread_fd = -1;
@@ -1081,7 +1081,7 @@ static void prepare_request(struct request *req, struct io_thread_req *io_req,
 }
 
 /* Called with dev->lock held */
-static void do_ubd_request(request_queue_t *q)
+static void do_ubd_request(struct request_queue *q)
 {
 	struct io_thread_req *io_req;
 	struct request *req;
diff --git a/block/as-iosched.c b/block/as-iosched.c
index 3e316dd7252..dc715a562e1 100644
--- a/block/as-iosched.c
+++ b/block/as-iosched.c
@@ -796,7 +796,7 @@ static void update_write_batch(struct as_data *ad)
  * as_completed_request is to be called when a request has completed and
  * returned something to the requesting process, be it an error or data.
  */
-static void as_completed_request(request_queue_t *q, struct request *rq)
+static void as_completed_request(struct request_queue *q, struct request *rq)
 {
 	struct as_data *ad = q->elevator->elevator_data;
 
@@ -853,7 +853,8 @@ out:
  * reference unless it replaces the request at somepart of the elevator
  * (ie. the dispatch queue)
  */
-static void as_remove_queued_request(request_queue_t *q, struct request *rq)
+static void as_remove_queued_request(struct request_queue *q,
+				     struct request *rq)
 {
 	const int data_dir = rq_is_sync(rq);
 	struct as_data *ad = q->elevator->elevator_data;
@@ -978,7 +979,7 @@ static void as_move_to_dispatch(struct as_data *ad, struct request *rq)
  * read/write expire, batch expire, etc, and moves it to the dispatch
  * queue. Returns 1 if a request was found, 0 otherwise.
  */
-static int as_dispatch_request(request_queue_t *q, int force)
+static int as_dispatch_request(struct request_queue *q, int force)
 {
 	struct as_data *ad = q->elevator->elevator_data;
 	const int reads = !list_empty(&ad->fifo_list[REQ_SYNC]);
@@ -1139,7 +1140,7 @@ fifo_expired:
 /*
  * add rq to rbtree and fifo
  */
-static void as_add_request(request_queue_t *q, struct request *rq)
+static void as_add_request(struct request_queue *q, struct request *rq)
 {
 	struct as_data *ad = q->elevator->elevator_data;
 	int data_dir;
@@ -1167,7 +1168,7 @@ static void as_add_request(request_queue_t *q, struct request *rq)
 	RQ_SET_STATE(rq, AS_RQ_QUEUED);
 }
 
-static void as_activate_request(request_queue_t *q, struct request *rq)
+static void as_activate_request(struct request_queue *q, struct request *rq)
 {
 	WARN_ON(RQ_STATE(rq) != AS_RQ_DISPATCHED);
 	RQ_SET_STATE(rq, AS_RQ_REMOVED);
@@ -1175,7 +1176,7 @@ static void as_activate_request(request_queue_t *q, struct request *rq)
 		atomic_dec(&RQ_IOC(rq)->aic->nr_dispatched);
 }
 
-static void as_deactivate_request(request_queue_t *q, struct request *rq)
+static void as_deactivate_request(struct request_queue *q, struct request *rq)
 {
 	WARN_ON(RQ_STATE(rq) != AS_RQ_REMOVED);
 	RQ_SET_STATE(rq, AS_RQ_DISPATCHED);
@@ -1189,7 +1190,7 @@ static void as_deactivate_request(request_queue_t *q, struct request *rq)
  * is not empty - it is used in the block layer to check for plugging and
  * merging opportunities
  */
-static int as_queue_empty(request_queue_t *q)
+static int as_queue_empty(struct request_queue *q)
 {
 	struct as_data *ad = q->elevator->elevator_data;
 
@@ -1198,7 +1199,7 @@ static int as_queue_empty(request_queue_t *q)
 }
 
 static int
-as_merge(request_queue_t *q, struct request **req, struct bio *bio)
+as_merge(struct request_queue *q, struct request **req, struct bio *bio)
 {
 	struct as_data *ad = q->elevator->elevator_data;
 	sector_t rb_key = bio->bi_sector + bio_sectors(bio);
@@ -1216,7 +1217,8 @@ as_merge(request_queue_t *q, struct request **req, struct bio *bio)
 	return ELEVATOR_NO_MERGE;
 }
 
-static void as_merged_request(request_queue_t *q, struct request *req, int type)
+static void as_merged_request(struct request_queue *q, struct request *req,
+			      int type)
 {
 	struct as_data *ad = q->elevator->elevator_data;
 
@@ -1234,7 +1236,7 @@ static void as_merged_request(request_queue_t *q, struct request *req, int type)
 	}
 }
 
-static void as_merged_requests(request_queue_t *q, struct request *req,
+static void as_merged_requests(struct request_queue *q, struct request *req,
 			 	struct request *next)
 {
 	/*
@@ -1285,7 +1287,7 @@ static void as_work_handler(struct work_struct *work)
 	spin_unlock_irqrestore(q->queue_lock, flags);
 }
 
-static int as_may_queue(request_queue_t *q, int rw)
+static int as_may_queue(struct request_queue *q, int rw)
 {
 	int ret = ELV_MQUEUE_MAY;
 	struct as_data *ad = q->elevator->elevator_data;
@@ -1318,7 +1320,7 @@ static void as_exit_queue(elevator_t *e)
 /*
  * initialize elevator private data (as_data).
  */
-static void *as_init_queue(request_queue_t *q)
+static void *as_init_queue(struct request_queue *q)
 {
 	struct as_data *ad;
 
diff --git a/block/blktrace.c b/block/blktrace.c
index 3f0e7c37c05..20c3e22587b 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -231,7 +231,7 @@ static void blk_trace_cleanup(struct blk_trace *bt)
 	kfree(bt);
 }
 
-static int blk_trace_remove(request_queue_t *q)
+static int blk_trace_remove(struct request_queue *q)
 {
 	struct blk_trace *bt;
 
@@ -312,7 +312,7 @@ static struct rchan_callbacks blk_relay_callbacks = {
 /*
  * Setup everything required to start tracing
  */
-static int blk_trace_setup(request_queue_t *q, struct block_device *bdev,
+static int blk_trace_setup(struct request_queue *q, struct block_device *bdev,
 			   char __user *arg)
 {
 	struct blk_user_trace_setup buts;
@@ -401,7 +401,7 @@ err:
 	return ret;
 }
 
-static int blk_trace_startstop(request_queue_t *q, int start)
+static int blk_trace_startstop(struct request_queue *q, int start)
 {
 	struct blk_trace *bt;
 	int ret;
@@ -444,7 +444,7 @@ static int blk_trace_startstop(request_queue_t *q, int start)
  **/
 int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
 {
-	request_queue_t *q;
+	struct request_queue *q;
 	int ret, start = 0;
 
 	q = bdev_get_queue(bdev);
@@ -479,7 +479,7 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
  * @q:    the request queue associated with the device
  *
  **/
-void blk_trace_shutdown(request_queue_t *q)
+void blk_trace_shutdown(struct request_queue *q)
 {
 	if (q->blk_trace) {
 		blk_trace_startstop(q, 0);
diff --git a/block/bsg.c b/block/bsg.c
index b571869928a..3b2f05258a9 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -37,7 +37,7 @@
 #define BSG_VERSION	"0.4"
 
 struct bsg_device {
-	request_queue_t *queue;
+	struct request_queue *queue;
 	spinlock_t lock;
 	struct list_head busy_list;
 	struct list_head done_list;
@@ -180,7 +180,7 @@ unlock:
 	return ret;
 }
 
-static int blk_fill_sgv4_hdr_rq(request_queue_t *q, struct request *rq,
+static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq,
 				struct sg_io_v4 *hdr, int has_write_perm)
 {
 	memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
@@ -214,7 +214,7 @@ static int blk_fill_sgv4_hdr_rq(request_queue_t *q, struct request *rq,
  * Check if sg_io_v4 from user is allowed and valid
  */
 static int
-bsg_validate_sgv4_hdr(request_queue_t *q, struct sg_io_v4 *hdr, int *rw)
+bsg_validate_sgv4_hdr(struct request_queue *q, struct sg_io_v4 *hdr, int *rw)
 {
 	int ret = 0;
 
@@ -250,7 +250,7 @@ bsg_validate_sgv4_hdr(request_queue_t *q, struct sg_io_v4 *hdr, int *rw)
 static struct request *
 bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr)
 {
-	request_queue_t *q = bd->queue;
+	struct request_queue *q = bd->queue;
 	struct request *rq, *next_rq = NULL;
 	int ret, rw;
 	unsigned int dxfer_len;
@@ -345,7 +345,7 @@ static void bsg_rq_end_io(struct request *rq, int uptodate)
  * do final setup of a 'bc' and submit the matching 'rq' to the block
  * layer for io
  */
-static void bsg_add_command(struct bsg_device *bd, request_queue_t *q,
+static void bsg_add_command(struct bsg_device *bd, struct request_queue *q,
 			    struct bsg_command *bc, struct request *rq)
 {
 	rq->sense = bc->sense;
@@ -611,7 +611,7 @@ static int __bsg_write(struct bsg_device *bd, const char __user *buf,
 	bc = NULL;
 	ret = 0;
 	while (nr_commands) {
-		request_queue_t *q = bd->queue;
+		struct request_queue *q = bd->queue;
 
 		bc = bsg_alloc_command(bd);
 		if (IS_ERR(bc)) {
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index d148ccbc36d..54dc0543900 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -71,7 +71,7 @@ struct cfq_rb_root {
  * Per block device queue structure
  */
 struct cfq_data {
-	request_queue_t *queue;
+	struct request_queue *queue;
 
 	/*
 	 * rr list of queues with requests and the count of them
@@ -197,7 +197,7 @@ CFQ_CFQQ_FNS(slice_new);
 CFQ_CFQQ_FNS(sync);
 #undef CFQ_CFQQ_FNS
 
-static void cfq_dispatch_insert(request_queue_t *, struct request *);
+static void cfq_dispatch_insert(struct request_queue *, struct request *);
 static struct cfq_queue *cfq_get_queue(struct cfq_data *, int,
 				       struct task_struct *, gfp_t);
 static struct cfq_io_context *cfq_cic_rb_lookup(struct cfq_data *,
@@ -237,7 +237,7 @@ static inline void cfq_schedule_dispatch(struct cfq_data *cfqd)
 		kblockd_schedule_work(&cfqd->unplug_work);
 }
 
-static int cfq_queue_empty(request_queue_t *q)
+static int cfq_queue_empty(struct request_queue *q)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 
@@ -623,7 +623,7 @@ cfq_find_rq_fmerge(struct cfq_data *cfqd, struct bio *bio)
 	return NULL;
 }
 
-static void cfq_activate_request(request_queue_t *q, struct request *rq)
+static void cfq_activate_request(struct request_queue *q, struct request *rq)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 
@@ -641,7 +641,7 @@ static void cfq_activate_request(request_queue_t *q, struct request *rq)
 	cfqd->last_position = rq->hard_sector + rq->hard_nr_sectors;
 }
 
-static void cfq_deactivate_request(request_queue_t *q, struct request *rq)
+static void cfq_deactivate_request(struct request_queue *q, struct request *rq)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 
@@ -665,7 +665,8 @@ static void cfq_remove_request(struct request *rq)
 	}
 }
 
-static int cfq_merge(request_queue_t *q, struct request **req, struct bio *bio)
+static int cfq_merge(struct request_queue *q, struct request **req,
+		     struct bio *bio)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 	struct request *__rq;
@@ -679,7 +680,7 @@ static int cfq_merge(request_queue_t *q, struct request **req, struct bio *bio)
 	return ELEVATOR_NO_MERGE;
 }
 
-static void cfq_merged_request(request_queue_t *q, struct request *req,
+static void cfq_merged_request(struct request_queue *q, struct request *req,
 			       int type)
 {
 	if (type == ELEVATOR_FRONT_MERGE) {
@@ -690,7 +691,7 @@ static void cfq_merged_request(request_queue_t *q, struct request *req,
 }
 
 static void
-cfq_merged_requests(request_queue_t *q, struct request *rq,
+cfq_merged_requests(struct request_queue *q, struct request *rq,
 		    struct request *next)
 {
 	/*
@@ -703,7 +704,7 @@ cfq_merged_requests(request_queue_t *q, struct request *rq,
 	cfq_remove_request(next);
 }
 
-static int cfq_allow_merge(request_queue_t *q, struct request *rq,
+static int cfq_allow_merge(struct request_queue *q, struct request *rq,
 			   struct bio *bio)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
@@ -913,7 +914,7 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
 /*
  * Move request from internal lists to the request queue dispatch list.
  */
-static void cfq_dispatch_insert(request_queue_t *q, struct request *rq)
+static void cfq_dispatch_insert(struct request_queue *q, struct request *rq)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 	struct cfq_queue *cfqq = RQ_CFQQ(rq);
@@ -1093,7 +1094,7 @@ static int cfq_forced_dispatch(struct cfq_data *cfqd)
 	return dispatched;
 }
 
-static int cfq_dispatch_requests(request_queue_t *q, int force)
+static int cfq_dispatch_requests(struct request_queue *q, int force)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 	struct cfq_queue *cfqq;
@@ -1214,7 +1215,7 @@ static void cfq_exit_single_io_context(struct cfq_io_context *cic)
 	struct cfq_data *cfqd = cic->key;
 
 	if (cfqd) {
-		request_queue_t *q = cfqd->queue;
+		struct request_queue *q = cfqd->queue;
 
 		spin_lock_irq(q->queue_lock);
 		__cfq_exit_single_io_context(cfqd, cic);
@@ -1775,7 +1776,7 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
 	}
 }
 
-static void cfq_insert_request(request_queue_t *q, struct request *rq)
+static void cfq_insert_request(struct request_queue *q, struct request *rq)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 	struct cfq_queue *cfqq = RQ_CFQQ(rq);
@@ -1789,7 +1790,7 @@ static void cfq_insert_request(request_queue_t *q, struct request *rq)
 	cfq_rq_enqueued(cfqd, cfqq, rq);
 }
 
-static void cfq_completed_request(request_queue_t *q, struct request *rq)
+static void cfq_completed_request(struct request_queue *q, struct request *rq)
 {
 	struct cfq_queue *cfqq = RQ_CFQQ(rq);
 	struct cfq_data *cfqd = cfqq->cfqd;
@@ -1868,7 +1869,7 @@ static inline int __cfq_may_queue(struct cfq_queue *cfqq)
 	return ELV_MQUEUE_MAY;
 }
 
-static int cfq_may_queue(request_queue_t *q, int rw)
+static int cfq_may_queue(struct request_queue *q, int rw)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 	struct task_struct *tsk = current;
@@ -1922,7 +1923,7 @@ static void cfq_put_request(struct request *rq)
  * Allocate cfq data structures associated with this request.
  */
 static int
-cfq_set_request(request_queue_t *q, struct request *rq, gfp_t gfp_mask)
+cfq_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 	struct task_struct *tsk = current;
@@ -1974,7 +1975,7 @@ static void cfq_kick_queue(struct work_struct *work)
 {
 	struct cfq_data *cfqd =
 		container_of(work, struct cfq_data, unplug_work);
-	request_queue_t *q = cfqd->queue;
+	struct request_queue *q = cfqd->queue;
 	unsigned long flags;
 
 	spin_lock_irqsave(q->queue_lock, flags);
@@ -2072,7 +2073,7 @@ static void cfq_put_async_queues(struct cfq_data *cfqd)
 static void cfq_exit_queue(elevator_t *e)
 {
 	struct cfq_data *cfqd = e->elevator_data;
-	request_queue_t *q = cfqd->queue;
+	struct request_queue *q = cfqd->queue;
 
 	cfq_shutdown_timer_wq(cfqd);
 
@@ -2098,7 +2099,7 @@ static void cfq_exit_queue(elevator_t *e)
 	kfree(cfqd);
 }
 
-static void *cfq_init_queue(request_queue_t *q)
+static void *cfq_init_queue(struct request_queue *q)
 {
 	struct cfq_data *cfqd;
 
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 87ca02ac84c..1a511ffaf8a 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -106,7 +106,7 @@ deadline_add_request(struct request_queue *q, struct request *rq)
 /*
  * remove rq from rbtree and fifo.
  */
-static void deadline_remove_request(request_queue_t *q, struct request *rq)
+static void deadline_remove_request(struct request_queue *q, struct request *rq)
 {
 	struct deadline_data *dd = q->elevator->elevator_data;
 
@@ -115,7 +115,7 @@ static void deadline_remove_request(request_queue_t *q, struct request *rq)
 }
 
 static int
-deadline_merge(request_queue_t *q, struct request **req, struct bio *bio)
+deadline_merge(struct request_queue *q, struct request **req, struct bio *bio)
 {
 	struct deadline_data *dd = q->elevator->elevator_data;
 	struct request *__rq;
@@ -144,8 +144,8 @@ out:
 	return ret;
 }
 
-static void deadline_merged_request(request_queue_t *q, struct request *req,
-				    int type)
+static void deadline_merged_request(struct request_queue *q,
+				    struct request *req, int type)
 {
 	struct deadline_data *dd = q->elevator->elevator_data;
 
@@ -159,7 +159,7 @@ static void deadline_merged_request(request_queue_t *q, struct request *req,
 }
 
 static void
-deadline_merged_requests(request_queue_t *q, struct request *req,
+deadline_merged_requests(struct request_queue *q, struct request *req,
 			 struct request *next)
 {
 	/*
@@ -185,7 +185,7 @@ deadline_merged_requests(request_queue_t *q, struct request *req,
 static inline void
 deadline_move_to_dispatch(struct deadline_data *dd, struct request *rq)
 {
-	request_queue_t *q = rq->q;
+	struct request_queue *q = rq->q;
 
 	deadline_remove_request(q, rq);
 	elv_dispatch_add_tail(q, rq);
@@ -236,7 +236,7 @@ static inline int deadline_check_fifo(struct deadline_data *dd, int ddir)
  * deadline_dispatch_requests selects the best request according to
  * read/write expire, fifo_batch, etc
  */
-static int deadline_dispatch_requests(request_queue_t *q, int force)
+static int deadline_dispatch_requests(struct request_queue *q, int force)
 {
 	struct deadline_data *dd = q->elevator->elevator_data;
 	const int reads = !list_empty(&dd->fifo_list[READ]);
@@ -335,7 +335,7 @@ dispatch_request:
 	return 1;
 }
 
-static int deadline_queue_empty(request_queue_t *q)
+static int deadline_queue_empty(struct request_queue *q)
 {
 	struct deadline_data *dd = q->elevator->elevator_data;
 
@@ -356,7 +356,7 @@ static void deadline_exit_queue(elevator_t *e)
 /*
  * initialize elevator private data (deadline_data).
  */
-static void *deadline_init_queue(request_queue_t *q)
+static void *deadline_init_queue(struct request_queue *q)
 {
 	struct deadline_data *dd;
 
diff --git a/block/elevator.c b/block/elevator.c
index d265963d1ed..c6d153de9fd 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -56,7 +56,7 @@ static const int elv_hash_shift = 6;
  */
 static int elv_iosched_allow_merge(struct request *rq, struct bio *bio)
 {
-	request_queue_t *q = rq->q;
+	struct request_queue *q = rq->q;
 	elevator_t *e = q->elevator;
 
 	if (e->ops->elevator_allow_merge_fn)
@@ -141,12 +141,13 @@ static struct elevator_type *elevator_get(const char *name)
 	return e;
 }
 
-static void *elevator_init_queue(request_queue_t *q, struct elevator_queue *eq)
+static void *elevator_init_queue(struct request_queue *q,
+				 struct elevator_queue *eq)
 {
 	return eq->ops->elevator_init_fn(q);
 }
 
-static void elevator_attach(request_queue_t *q, struct elevator_queue *eq,
+static void elevator_attach(struct request_queue *q, struct elevator_queue *eq,
 			   void *data)
 {
 	q->elevator = eq;
@@ -172,7 +173,8 @@ __setup("elevator=", elevator_setup);
 
 static struct kobj_type elv_ktype;
 
-static elevator_t *elevator_alloc(request_queue_t *q, struct elevator_type *e)
+static elevator_t *elevator_alloc(struct request_queue *q,
+				  struct elevator_type *e)
 {
 	elevator_t *eq;
 	int i;
@@ -212,7 +214,7 @@ static void elevator_release(struct kobject *kobj)
 	kfree(e);
 }
 
-int elevator_init(request_queue_t *q, char *name)
+int elevator_init(struct request_queue *q, char *name)
 {
 	struct elevator_type *e = NULL;
 	struct elevator_queue *eq;
@@ -264,7 +266,7 @@ void elevator_exit(elevator_t *e)
 
 EXPORT_SYMBOL(elevator_exit);
 
-static void elv_activate_rq(request_queue_t *q, struct request *rq)
+static void elv_activate_rq(struct request_queue *q, struct request *rq)
 {
 	elevator_t *e = q->elevator;
 
@@ -272,7 +274,7 @@ static void elv_activate_rq(request_queue_t *q, struct request *rq)
 		e->ops->elevator_activate_req_fn(q, rq);
 }
 
-static void elv_deactivate_rq(request_queue_t *q, struct request *rq)
+static void elv_deactivate_rq(struct request_queue *q, struct request *rq)
 {
 	elevator_t *e = q->elevator;
 
@@ -285,13 +287,13 @@ static inline void __elv_rqhash_del(struct request *rq)
 	hlist_del_init(&rq->hash);
 }
 
-static void elv_rqhash_del(request_queue_t *q, struct request *rq)
+static void elv_rqhash_del(struct request_queue *q, struct request *rq)
 {
 	if (ELV_ON_HASH(rq))
 		__elv_rqhash_del(rq);
 }
 
-static void elv_rqhash_add(request_queue_t *q, struct request *rq)
+static void elv_rqhash_add(struct request_queue *q, struct request *rq)
 {
 	elevator_t *e = q->elevator;
 
@@ -299,13 +301,13 @@ static void elv_rqhash_add(request_queue_t *q, struct request *rq)
 	hlist_add_head(&rq->hash, &e->hash[ELV_HASH_FN(rq_hash_key(rq))]);
 }
 
-static void elv_rqhash_reposition(request_queue_t *q, struct request *rq)
+static void elv_rqhash_reposition(struct request_queue *q, struct request *rq)
 {
 	__elv_rqhash_del(rq);
 	elv_rqhash_add(q, rq);
 }
 
-static struct request *elv_rqhash_find(request_queue_t *q, sector_t offset)
+static struct request *elv_rqhash_find(struct request_queue *q, sector_t offset)
 {
 	elevator_t *e = q->elevator;
 	struct hlist_head *hash_list = &e->hash[ELV_HASH_FN(offset)];
@@ -391,7 +393,7 @@ EXPORT_SYMBOL(elv_rb_find);
  * entry.  rq is sort insted into the dispatch queue. To be used by
  * specific elevators.
  */
-void elv_dispatch_sort(request_queue_t *q, struct request *rq)
+void elv_dispatch_sort(struct request_queue *q, struct request *rq)
 {
 	sector_t boundary;
 	struct list_head *entry;
@@ -449,7 +451,7 @@ void elv_dispatch_add_tail(struct request_queue *q, struct request *rq)
 
 EXPORT_SYMBOL(elv_dispatch_add_tail);
 
-int elv_merge(request_queue_t *q, struct request **req, struct bio *bio)
+int elv_merge(struct request_queue *q, struct request **req, struct bio *bio)
 {
 	elevator_t *e = q->elevator;
 	struct request *__rq;
@@ -481,7 +483,7 @@ int elv_merge(request_queue_t *q, struct request **req, struct bio *bio)
 	return ELEVATOR_NO_MERGE;
 }
 
-void elv_merged_request(request_queue_t *q, struct request *rq, int type)
+void elv_merged_request(struct request_queue *q, struct request *rq, int type)
 {
 	elevator_t *e = q->elevator;
 
@@ -494,7 +496,7 @@ void elv_merged_request(request_queue_t *q, struct request *rq, int type)
 	q->last_merge = rq;
 }
 
-void elv_merge_requests(request_queue_t *q, struct request *rq,
+void elv_merge_requests(struct request_queue *q, struct request *rq,
 			     struct request *next)
 {
 	elevator_t *e = q->elevator;
@@ -509,7 +511,7 @@ void elv_merge_requests(request_queue_t *q, struct request *rq,
 	q->last_merge = rq;
 }
 
-void elv_requeue_request(request_queue_t *q, struct request *rq)
+void elv_requeue_request(struct request_queue *q, struct request *rq)
 {
 	/*
 	 * it already went through dequeue, we need to decrement the
@@ -526,7 +528,7 @@ void elv_requeue_request(request_queue_t *q, struct request *rq)
 	elv_insert(q, rq, ELEVATOR_INSERT_REQUEUE);
 }
 
-static void elv_drain_elevator(request_queue_t *q)
+static void elv_drain_elevator(struct request_queue *q)
 {
 	static int printed;
 	while (q->elevator->ops->elevator_dispatch_fn(q, 1))
@@ -540,7 +542,7 @@ static void elv_drain_elevator(request_queue_t *q)
 	}
 }
 
-void elv_insert(request_queue_t *q, struct request *rq, int where)
+void elv_insert(struct request_queue *q, struct request *rq, int where)
 {
 	struct list_head *pos;
 	unsigned ordseq;
@@ -638,7 +640,7 @@ void elv_insert(request_queue_t *q, struct request *rq, int where)
 	}
 }
 
-void __elv_add_request(request_queue_t *q, struct request *rq, int where,
+void __elv_add_request(struct request_queue *q, struct request *rq, int where,
 		       int plug)
 {
 	if (q->ordcolor)
@@ -676,7 +678,7 @@ void __elv_add_request(request_queue_t *q, struct request *rq, int where,
 
 EXPORT_SYMBOL(__elv_add_request);
 
-void elv_add_request(request_queue_t *q, struct request *rq, int where,
+void elv_add_request(struct request_queue *q, struct request *rq, int where,
 		     int plug)
 {
 	unsigned long flags;
@@ -688,7 +690,7 @@ void elv_add_request(request_queue_t *q, struct request *rq, int where,
 
 EXPORT_SYMBOL(elv_add_request);
 
-static inline struct request *__elv_next_request(request_queue_t *q)
+static inline struct request *__elv_next_request(struct request_queue *q)
 {
 	struct request *rq;
 
@@ -704,7 +706,7 @@ static inline struct request *__elv_next_request(request_queue_t *q)
 	}
 }
 
-struct request *elv_next_request(request_queue_t *q)
+struct request *elv_next_request(struct request_queue *q)
 {
 	struct request *rq;
 	int ret;
@@ -770,7 +772,7 @@ struct request *elv_next_request(request_queue_t *q)
 
 EXPORT_SYMBOL(elv_next_request);
 
-void elv_dequeue_request(request_queue_t *q, struct request *rq)
+void elv_dequeue_request(struct request_queue *q, struct request *rq)
 {
 	BUG_ON(list_empty(&rq->queuelist));
 	BUG_ON(ELV_ON_HASH(rq));
@@ -788,7 +790,7 @@ void elv_dequeue_request(request_queue_t *q, struct request *rq)
 
 EXPORT_SYMBOL(elv_dequeue_request);
 
-int elv_queue_empty(request_queue_t *q)
+int elv_queue_empty(struct request_queue *q)
 {
 	elevator_t *e = q->elevator;
 
@@ -803,7 +805,7 @@ int elv_queue_empty(request_queue_t *q)
 
 EXPORT_SYMBOL(elv_queue_empty);
 
-struct request *elv_latter_request(request_queue_t *q, struct request *rq)
+struct request *elv_latter_request(struct request_queue *q, struct request *rq)
 {
 	elevator_t *e = q->elevator;
 
@@ -812,7 +814,7 @@ struct request *elv_latter_request(request_queue_t *q, struct request *rq)
 	return NULL;
 }
 
-struct request *elv_former_request(request_queue_t *q, struct request *rq)
+struct request *elv_former_request(struct request_queue *q, struct request *rq)
 {
 	elevator_t *e = q->elevator;
 
@@ -821,7 +823,7 @@ struct request *elv_former_request(request_queue_t *q, struct request *rq)
 	return NULL;
 }
 
-int elv_set_request(request_queue_t *q, struct request *rq, gfp_t gfp_mask)
+int elv_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask)
 {
 	elevator_t *e = q->elevator;
 
@@ -832,7 +834,7 @@ int elv_set_request(request_queue_t *q, struct request *rq, gfp_t gfp_mask)
 	return 0;
 }
 
-void elv_put_request(request_queue_t *q, struct request *rq)
+void elv_put_request(struct request_queue *q, struct request *rq)
 {
 	elevator_t *e = q->elevator;
 
@@ -840,7 +842,7 @@ void elv_put_request(request_queue_t *q, struct request *rq)
 		e->ops->elevator_put_req_fn(rq);
 }
 
-int elv_may_queue(request_queue_t *q, int rw)
+int elv_may_queue(struct request_queue *q, int rw)
 {
 	elevator_t *e = q->elevator;
 
@@ -850,7 +852,7 @@ int elv_may_queue(request_queue_t *q, int rw)
 	return ELV_MQUEUE_MAY;
 }
 
-void elv_completed_request(request_queue_t *q, struct request *rq)
+void elv_completed_request(struct request_queue *q, struct request *rq)
 {
 	elevator_t *e = q->elevator;
 
@@ -1006,7 +1008,7 @@ EXPORT_SYMBOL_GPL(elv_unregister);
  * need for the new one. this way we have a chance of going back to the old
  * one, if the new one fails init for some reason.
  */
-static int elevator_switch(request_queue_t *q, struct elevator_type *new_e)
+static int elevator_switch(struct request_queue *q, struct elevator_type *new_e)
 {
 	elevator_t *old_elevator, *e;
 	void *data;
@@ -1078,7 +1080,8 @@ fail_register:
 	return 0;
 }
 
-ssize_t elv_iosched_store(request_queue_t *q, const char *name, size_t count)
+ssize_t elv_iosched_store(struct request_queue *q, const char *name,
+			  size_t count)
 {
 	char elevator_name[ELV_NAME_MAX];
 	size_t len;
@@ -1107,7 +1110,7 @@ ssize_t elv_iosched_store(request_queue_t *q, const char *name, size_t count)
 	return count;
 }
 
-ssize_t elv_iosched_show(request_queue_t *q, char *name)
+ssize_t elv_iosched_show(struct request_queue *q, char *name)
 {
 	elevator_t *e = q->elevator;
 	struct elevator_type *elv = e->elevator_type;
@@ -1127,7 +1130,8 @@ ssize_t elv_iosched_show(request_queue_t *q, char *name)
 	return len;
 }
 
-struct request *elv_rb_former_request(request_queue_t *q, struct request *rq)
+struct request *elv_rb_former_request(struct request_queue *q,
+				      struct request *rq)
 {
 	struct rb_node *rbprev = rb_prev(&rq->rb_node);
 
@@ -1139,7 +1143,8 @@ struct request *elv_rb_former_request(request_queue_t *q, struct request *rq)
 
 EXPORT_SYMBOL(elv_rb_former_request);
 
-struct request *elv_rb_latter_request(request_queue_t *q, struct request *rq)
+struct request *elv_rb_latter_request(struct request_queue *q,
+				      struct request *rq)
 {
 	struct rb_node *rbnext = rb_next(&rq->rb_node);
 
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 66056ca5e63..8c2caff87cc 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -40,7 +40,7 @@ static void blk_unplug_work(struct work_struct *work);
 static void blk_unplug_timeout(unsigned long data);
 static void drive_stat_acct(struct request *rq, int nr_sectors, int new_io);
 static void init_request_from_bio(struct request *req, struct bio *bio);
-static int __make_request(request_queue_t *q, struct bio *bio);
+static int __make_request(struct request_queue *q, struct bio *bio);
 static struct io_context *current_io_context(gfp_t gfp_flags, int node);
 
 /*
@@ -121,7 +121,7 @@ static void blk_queue_congestion_threshold(struct request_queue *q)
 struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev)
 {
 	struct backing_dev_info *ret = NULL;
-	request_queue_t *q = bdev_get_queue(bdev);
+	struct request_queue *q = bdev_get_queue(bdev);
 
 	if (q)
 		ret = &q->backing_dev_info;
@@ -140,7 +140,7 @@ EXPORT_SYMBOL(blk_get_backing_dev_info);
  * cdb from the request data for instance.
  *
  */
-void blk_queue_prep_rq(request_queue_t *q, prep_rq_fn *pfn)
+void blk_queue_prep_rq(struct request_queue *q, prep_rq_fn *pfn)
 {
 	q->prep_rq_fn = pfn;
 }
@@ -163,14 +163,14 @@ EXPORT_SYMBOL(blk_queue_prep_rq);
  * no merge_bvec_fn is defined for a queue, and only the fixed limits are
  * honored.
  */
-void blk_queue_merge_bvec(request_queue_t *q, merge_bvec_fn *mbfn)
+void blk_queue_merge_bvec(struct request_queue *q, merge_bvec_fn *mbfn)
 {
 	q->merge_bvec_fn = mbfn;
 }
 
 EXPORT_SYMBOL(blk_queue_merge_bvec);
 
-void blk_queue_softirq_done(request_queue_t *q, softirq_done_fn *fn)
+void blk_queue_softirq_done(struct request_queue *q, softirq_done_fn *fn)
 {
 	q->softirq_done_fn = fn;
 }
@@ -199,7 +199,7 @@ EXPORT_SYMBOL(blk_queue_softirq_done);
  *    __bio_kmap_atomic() to get a temporary kernel mapping, or by calling
  *    blk_queue_bounce() to create a buffer in normal memory.
  **/
-void blk_queue_make_request(request_queue_t * q, make_request_fn * mfn)
+void blk_queue_make_request(struct request_queue * q, make_request_fn * mfn)
 {
 	/*
 	 * set defaults
@@ -235,7 +235,7 @@ void blk_queue_make_request(request_queue_t * q, make_request_fn * mfn)
 
 EXPORT_SYMBOL(blk_queue_make_request);
 
-static void rq_init(request_queue_t *q, struct request *rq)
+static void rq_init(struct request_queue *q, struct request *rq)
 {
 	INIT_LIST_HEAD(&rq->queuelist);
 	INIT_LIST_HEAD(&rq->donelist);
@@ -272,7 +272,7 @@ static void rq_init(request_queue_t *q, struct request *rq)
  *   feature should call this function and indicate so.
  *
  **/
-int blk_queue_ordered(request_queue_t *q, unsigned ordered,
+int blk_queue_ordered(struct request_queue *q, unsigned ordered,
 		      prepare_flush_fn *prepare_flush_fn)
 {
 	if (ordered & (QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH) &&
@@ -311,7 +311,7 @@ EXPORT_SYMBOL(blk_queue_ordered);
  *   to the block layer by defining it through this call.
  *
  **/
-void blk_queue_issue_flush_fn(request_queue_t *q, issue_flush_fn *iff)
+void blk_queue_issue_flush_fn(struct request_queue *q, issue_flush_fn *iff)
 {
 	q->issue_flush_fn = iff;
 }
@@ -321,7 +321,7 @@ EXPORT_SYMBOL(blk_queue_issue_flush_fn);
 /*
  * Cache flushing for ordered writes handling
  */
-inline unsigned blk_ordered_cur_seq(request_queue_t *q)
+inline unsigned blk_ordered_cur_seq(struct request_queue *q)
 {
 	if (!q->ordseq)
 		return 0;
@@ -330,7 +330,7 @@ inline unsigned blk_ordered_cur_seq(request_queue_t *q)
 
 unsigned blk_ordered_req_seq(struct request *rq)
 {
-	request_queue_t *q = rq->q;
+	struct request_queue *q = rq->q;
 
 	BUG_ON(q->ordseq == 0);
 
@@ -357,7 +357,7 @@ unsigned blk_ordered_req_seq(struct request *rq)
 		return QUEUE_ORDSEQ_DONE;
 }
 
-void blk_ordered_complete_seq(request_queue_t *q, unsigned seq, int error)
+void blk_ordered_complete_seq(struct request_queue *q, unsigned seq, int error)
 {
 	struct request *rq;
 	int uptodate;
@@ -401,7 +401,7 @@ static void post_flush_end_io(struct request *rq, int error)
 	blk_ordered_complete_seq(rq->q, QUEUE_ORDSEQ_POSTFLUSH, error);
 }
 
-static void queue_flush(request_queue_t *q, unsigned which)
+static void queue_flush(struct request_queue *q, unsigned which)
 {
 	struct request *rq;
 	rq_end_io_fn *end_io;
@@ -425,7 +425,7 @@ static void queue_flush(request_queue_t *q, unsigned which)
 	elv_insert(q, rq, ELEVATOR_INSERT_FRONT);
 }
 
-static inline struct request *start_ordered(request_queue_t *q,
+static inline struct request *start_ordered(struct request_queue *q,
 					    struct request *rq)
 {
 	q->bi_size = 0;
@@ -476,7 +476,7 @@ static inline struct request *start_ordered(request_queue_t *q,
 	return rq;
 }
 
-int blk_do_ordered(request_queue_t *q, struct request **rqp)
+int blk_do_ordered(struct request_queue *q, struct request **rqp)
 {
 	struct request *rq = *rqp;
 	int is_barrier = blk_fs_request(rq) && blk_barrier_rq(rq);
@@ -527,7 +527,7 @@ int blk_do_ordered(request_queue_t *q, struct request **rqp)
 
 static int flush_dry_bio_endio(struct bio *bio, unsigned int bytes, int error)
 {
-	request_queue_t *q = bio->bi_private;
+	struct request_queue *q = bio->bi_private;
 
 	/*
 	 * This is dry run, restore bio_sector and size.  We'll finish
@@ -551,7 +551,7 @@ static int flush_dry_bio_endio(struct bio *bio, unsigned int bytes, int error)
 static int ordered_bio_endio(struct request *rq, struct bio *bio,
 			     unsigned int nbytes, int error)
 {
-	request_queue_t *q = rq->q;
+	struct request_queue *q = rq->q;
 	bio_end_io_t *endio;
 	void *private;
 
@@ -588,7 +588,7 @@ static int ordered_bio_endio(struct request *rq, struct bio *bio,
  *    blk_queue_bounce_limit to have lower memory pages allocated as bounce
  *    buffers for doing I/O to pages residing above @page.
  **/
-void blk_queue_bounce_limit(request_queue_t *q, u64 dma_addr)
+void blk_queue_bounce_limit(struct request_queue *q, u64 dma_addr)
 {
 	unsigned long bounce_pfn = dma_addr >> PAGE_SHIFT;
 	int dma = 0;
@@ -624,7 +624,7 @@ EXPORT_SYMBOL(blk_queue_bounce_limit);
  *    Enables a low level driver to set an upper limit on the size of
  *    received requests.
  **/
-void blk_queue_max_sectors(request_queue_t *q, unsigned int max_sectors)
+void blk_queue_max_sectors(struct request_queue *q, unsigned int max_sectors)
 {
 	if ((max_sectors << 9) < PAGE_CACHE_SIZE) {
 		max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
@@ -651,7 +651,8 @@ EXPORT_SYMBOL(blk_queue_max_sectors);
  *    physical data segments in a request.  This would be the largest sized
  *    scatter list the driver could handle.
  **/
-void blk_queue_max_phys_segments(request_queue_t *q, unsigned short max_segments)
+void blk_queue_max_phys_segments(struct request_queue *q,
+				 unsigned short max_segments)
 {
 	if (!max_segments) {
 		max_segments = 1;
@@ -674,7 +675,8 @@ EXPORT_SYMBOL(blk_queue_max_phys_segments);
  *    address/length pairs the host adapter can actually give as once
  *    to the device.
  **/
-void blk_queue_max_hw_segments(request_queue_t *q, unsigned short max_segments)
+void blk_queue_max_hw_segments(struct request_queue *q,
+			       unsigned short max_segments)
 {
 	if (!max_segments) {
 		max_segments = 1;
@@ -695,7 +697,7 @@ EXPORT_SYMBOL(blk_queue_max_hw_segments);
  *    Enables a low level driver to set an upper limit on the size of a
  *    coalesced segment
  **/
-void blk_queue_max_segment_size(request_queue_t *q, unsigned int max_size)
+void blk_queue_max_segment_size(struct request_queue *q, unsigned int max_size)
 {
 	if (max_size < PAGE_CACHE_SIZE) {
 		max_size = PAGE_CACHE_SIZE;
@@ -718,7 +720,7 @@ EXPORT_SYMBOL(blk_queue_max_segment_size);
  *   even internal read-modify-write operations). Usually the default
  *   of 512 covers most hardware.
  **/
-void blk_queue_hardsect_size(request_queue_t *q, unsigned short size)
+void blk_queue_hardsect_size(struct request_queue *q, unsigned short size)
 {
 	q->hardsect_size = size;
 }
@@ -735,7 +737,7 @@ EXPORT_SYMBOL(blk_queue_hardsect_size);
  * @t:	the stacking driver (top)
  * @b:  the underlying device (bottom)
  **/
-void blk_queue_stack_limits(request_queue_t *t, request_queue_t *b)
+void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b)
 {
 	/* zero is "infinity" */
 	t->max_sectors = min_not_zero(t->max_sectors,b->max_sectors);
@@ -756,7 +758,7 @@ EXPORT_SYMBOL(blk_queue_stack_limits);
  * @q:  the request queue for the device
  * @mask:  the memory boundary mask
  **/
-void blk_queue_segment_boundary(request_queue_t *q, unsigned long mask)
+void blk_queue_segment_boundary(struct request_queue *q, unsigned long mask)
 {
 	if (mask < PAGE_CACHE_SIZE - 1) {
 		mask = PAGE_CACHE_SIZE - 1;
@@ -778,7 +780,7 @@ EXPORT_SYMBOL(blk_queue_segment_boundary);
  *    this is used when buiding direct io requests for the queue.
  *
  **/
-void blk_queue_dma_alignment(request_queue_t *q, int mask)
+void blk_queue_dma_alignment(struct request_queue *q, int mask)
 {
 	q->dma_alignment = mask;
 }
@@ -796,7 +798,7 @@ EXPORT_SYMBOL(blk_queue_dma_alignment);
  *
  *    no locks need be held.
  **/
-struct request *blk_queue_find_tag(request_queue_t *q, int tag)
+struct request *blk_queue_find_tag(struct request_queue *q, int tag)
 {
 	return blk_map_queue_find_tag(q->queue_tags, tag);
 }
@@ -840,7 +842,7 @@ static int __blk_free_tags(struct blk_queue_tag *bqt)
  *    blk_cleanup_queue() will take care of calling this function, if tagging
  *    has been used. So there's no need to call this directly.
  **/
-static void __blk_queue_free_tags(request_queue_t *q)
+static void __blk_queue_free_tags(struct request_queue *q)
 {
 	struct blk_queue_tag *bqt = q->queue_tags;
 
@@ -877,7 +879,7 @@ EXPORT_SYMBOL(blk_free_tags);
  *	This is used to disabled tagged queuing to a device, yet leave
  *	queue in function.
  **/
-void blk_queue_free_tags(request_queue_t *q)
+void blk_queue_free_tags(struct request_queue *q)
 {
 	clear_bit(QUEUE_FLAG_QUEUED, &q->queue_flags);
 }
@@ -885,7 +887,7 @@ void blk_queue_free_tags(request_queue_t *q)
 EXPORT_SYMBOL(blk_queue_free_tags);
 
 static int
-init_tag_map(request_queue_t *q, struct blk_queue_tag *tags, int depth)
+init_tag_map(struct request_queue *q, struct blk_queue_tag *tags, int depth)
 {
 	struct request **tag_index;
 	unsigned long *tag_map;
@@ -955,7 +957,7 @@ EXPORT_SYMBOL(blk_init_tags);
  * @depth:  the maximum queue depth supported
  * @tags: the tag to use
  **/
-int blk_queue_init_tags(request_queue_t *q, int depth,
+int blk_queue_init_tags(struct request_queue *q, int depth,
 			struct blk_queue_tag *tags)
 {
 	int rc;
@@ -996,7 +998,7 @@ EXPORT_SYMBOL(blk_queue_init_tags);
  *  Notes:
  *    Must be called with the queue lock held.
  **/
-int blk_queue_resize_tags(request_queue_t *q, int new_depth)
+int blk_queue_resize_tags(struct request_queue *q, int new_depth)
 {
 	struct blk_queue_tag *bqt = q->queue_tags;
 	struct request **tag_index;
@@ -1059,7 +1061,7 @@ EXPORT_SYMBOL(blk_queue_resize_tags);
  *  Notes:
  *   queue lock must be held.
  **/
-void blk_queue_end_tag(request_queue_t *q, struct request *rq)
+void blk_queue_end_tag(struct request_queue *q, struct request *rq)
 {
 	struct blk_queue_tag *bqt = q->queue_tags;
 	int tag = rq->tag;
@@ -1111,7 +1113,7 @@ EXPORT_SYMBOL(blk_queue_end_tag);
  *  Notes:
  *   queue lock must be held.
  **/
-int blk_queue_start_tag(request_queue_t *q, struct request *rq)
+int blk_queue_start_tag(struct request_queue *q, struct request *rq)
 {
 	struct blk_queue_tag *bqt = q->queue_tags;
 	int tag;
@@ -1158,7 +1160,7 @@ EXPORT_SYMBOL(blk_queue_start_tag);
  *  Notes:
  *   queue lock must be held.
  **/
-void blk_queue_invalidate_tags(request_queue_t *q)
+void blk_queue_invalidate_tags(struct request_queue *q)
 {
 	struct blk_queue_tag *bqt = q->queue_tags;
 	struct list_head *tmp, *n;
@@ -1205,7 +1207,7 @@ void blk_dump_rq_flags(struct request *rq, char *msg)
 
 EXPORT_SYMBOL(blk_dump_rq_flags);
 
-void blk_recount_segments(request_queue_t *q, struct bio *bio)
+void blk_recount_segments(struct request_queue *q, struct bio *bio)
 {
 	struct bio_vec *bv, *bvprv = NULL;
 	int i, nr_phys_segs, nr_hw_segs, seg_size, hw_seg_size, cluster;
@@ -1267,7 +1269,7 @@ new_hw_segment:
 }
 EXPORT_SYMBOL(blk_recount_segments);
 
-static int blk_phys_contig_segment(request_queue_t *q, struct bio *bio,
+static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
 				   struct bio *nxt)
 {
 	if (!(q->queue_flags & (1 << QUEUE_FLAG_CLUSTER)))
@@ -1288,7 +1290,7 @@ static int blk_phys_contig_segment(request_queue_t *q, struct bio *bio,
 	return 0;
 }
 
-static int blk_hw_contig_segment(request_queue_t *q, struct bio *bio,
+static int blk_hw_contig_segment(struct request_queue *q, struct bio *bio,
 				 struct bio *nxt)
 {
 	if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
@@ -1308,7 +1310,8 @@ static int blk_hw_contig_segment(request_queue_t *q, struct bio *bio,
  * map a request to scatterlist, return number of sg entries setup. Caller
  * must make sure sg can hold rq->nr_phys_segments entries
  */
-int blk_rq_map_sg(request_queue_t *q, struct request *rq, struct scatterlist *sg)
+int blk_rq_map_sg(struct request_queue *q, struct request *rq,
+		  struct scatterlist *sg)
 {
 	struct bio_vec *bvec, *bvprv;
 	struct bio *bio;
@@ -1361,7 +1364,7 @@ EXPORT_SYMBOL(blk_rq_map_sg);
  * specific ones if so desired
  */
 
-static inline int ll_new_mergeable(request_queue_t *q,
+static inline int ll_new_mergeable(struct request_queue *q,
 				   struct request *req,
 				   struct bio *bio)
 {
@@ -1382,7 +1385,7 @@ static inline int ll_new_mergeable(request_queue_t *q,
 	return 1;
 }
 
-static inline int ll_new_hw_segment(request_queue_t *q,
+static inline int ll_new_hw_segment(struct request_queue *q,
 				    struct request *req,
 				    struct bio *bio)
 {
@@ -1406,7 +1409,7 @@ static inline int ll_new_hw_segment(request_queue_t *q,
 	return 1;
 }
 
-int ll_back_merge_fn(request_queue_t *q, struct request *req, struct bio *bio)
+int ll_back_merge_fn(struct request_queue *q, struct request *req, struct bio *bio)
 {
 	unsigned short max_sectors;
 	int len;
@@ -1444,7 +1447,7 @@ int ll_back_merge_fn(request_queue_t *q, struct request *req, struct bio *bio)
 }
 EXPORT_SYMBOL(ll_back_merge_fn);
 
-static int ll_front_merge_fn(request_queue_t *q, struct request *req, 
+static int ll_front_merge_fn(struct request_queue *q, struct request *req, 
 			     struct bio *bio)
 {
 	unsigned short max_sectors;
@@ -1483,7 +1486,7 @@ static int ll_front_merge_fn(request_queue_t *q, struct request *req,
 	return ll_new_hw_segment(q, req, bio);
 }
 
-static int ll_merge_requests_fn(request_queue_t *q, struct request *req,
+static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
 				struct request *next)
 {
 	int total_phys_segments;
@@ -1539,7 +1542,7 @@ static int ll_merge_requests_fn(request_queue_t *q, struct request *req,
  * This is called with interrupts off and no requests on the queue and
  * with the queue lock held.
  */
-void blk_plug_device(request_queue_t *q)
+void blk_plug_device(struct request_queue *q)
 {
 	WARN_ON(!irqs_disabled());
 
@@ -1562,7 +1565,7 @@ EXPORT_SYMBOL(blk_plug_device);
  * remove the queue from the plugged list, if present. called with
  * queue lock held and interrupts disabled.
  */
-int blk_remove_plug(request_queue_t *q)
+int blk_remove_plug(struct request_queue *q)
 {
 	WARN_ON(!irqs_disabled());
 
@@ -1578,7 +1581,7 @@ EXPORT_SYMBOL(blk_remove_plug);
 /*
  * remove the plug and let it rip..
  */
-void __generic_unplug_device(request_queue_t *q)
+void __generic_unplug_device(struct request_queue *q)
 {
 	if (unlikely(blk_queue_stopped(q)))
 		return;
@@ -1592,7 +1595,7 @@ EXPORT_SYMBOL(__generic_unplug_device);
 
 /**
  * generic_unplug_device - fire a request queue
- * @q:    The &request_queue_t in question
+ * @q:    The &struct request_queue in question
  *
  * Description:
  *   Linux uses plugging to build bigger requests queues before letting
@@ -1601,7 +1604,7 @@ EXPORT_SYMBOL(__generic_unplug_device);
  *   gets unplugged, the request_fn defined for the queue is invoked and
  *   transfers started.
  **/
-void generic_unplug_device(request_queue_t *q)
+void generic_unplug_device(struct request_queue *q)
 {
 	spin_lock_irq(q->queue_lock);
 	__generic_unplug_device(q);
@@ -1612,7 +1615,7 @@ EXPORT_SYMBOL(generic_unplug_device);
 static void blk_backing_dev_unplug(struct backing_dev_info *bdi,
 				   struct page *page)
 {
-	request_queue_t *q = bdi->unplug_io_data;
+	struct request_queue *q = bdi->unplug_io_data;
 
 	/*
 	 * devices don't necessarily have an ->unplug_fn defined
@@ -1627,7 +1630,8 @@ static void blk_backing_dev_unplug(struct backing_dev_info *bdi,
 
 static void blk_unplug_work(struct work_struct *work)
 {
-	request_queue_t *q = container_of(work, request_queue_t, unplug_work);
+	struct request_queue *q =
+		container_of(work, struct request_queue, unplug_work);
 
 	blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_IO, NULL,
 				q->rq.count[READ] + q->rq.count[WRITE]);
@@ -1637,7 +1641,7 @@ static void blk_unplug_work(struct work_struct *work)
 
 static void blk_unplug_timeout(unsigned long data)
 {
-	request_queue_t *q = (request_queue_t *)data;
+	struct request_queue *q = (struct request_queue *)data;
 
 	blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_TIMER, NULL,
 				q->rq.count[READ] + q->rq.count[WRITE]);
@@ -1647,14 +1651,14 @@ static void blk_unplug_timeout(unsigned long data)
 
 /**
  * blk_start_queue - restart a previously stopped queue
- * @q:    The &request_queue_t in question
+ * @q:    The &struct request_queue in question
  *
  * Description:
  *   blk_start_queue() will clear the stop flag on the queue, and call
  *   the request_fn for the queue if it was in a stopped state when
  *   entered. Also see blk_stop_queue(). Queue lock must be held.
  **/
-void blk_start_queue(request_queue_t *q)
+void blk_start_queue(struct request_queue *q)
 {
 	WARN_ON(!irqs_disabled());
 
@@ -1677,7 +1681,7 @@ EXPORT_SYMBOL(blk_start_queue);
 
 /**
  * blk_stop_queue - stop a queue
- * @q:    The &request_queue_t in question
+ * @q:    The &struct request_queue in question
  *
  * Description:
  *   The Linux block layer assumes that a block driver will consume all
@@ -1689,7 +1693,7 @@ EXPORT_SYMBOL(blk_start_queue);
  *   the driver has signalled it's ready to go again. This happens by calling
  *   blk_start_queue() to restart queue operations. Queue lock must be held.
  **/
-void blk_stop_queue(request_queue_t *q)
+void blk_stop_queue(struct request_queue *q)
 {
 	blk_remove_plug(q);
 	set_bit(QUEUE_FLAG_STOPPED, &q->queue_flags);
@@ -1746,7 +1750,7 @@ void blk_run_queue(struct request_queue *q)
 EXPORT_SYMBOL(blk_run_queue);
 
 /**
- * blk_cleanup_queue: - release a &request_queue_t when it is no longer needed
+ * blk_cleanup_queue: - release a &struct request_queue when it is no longer needed
  * @kobj:    the kobj belonging of the request queue to be released
  *
  * Description:
@@ -1762,7 +1766,8 @@ EXPORT_SYMBOL(blk_run_queue);
  **/
 static void blk_release_queue(struct kobject *kobj)
 {
-	request_queue_t *q = container_of(kobj, struct request_queue, kobj);
+	struct request_queue *q =
+		container_of(kobj, struct request_queue, kobj);
 	struct request_list *rl = &q->rq;
 
 	blk_sync_queue(q);
@@ -1778,13 +1783,13 @@ static void blk_release_queue(struct kobject *kobj)
 	kmem_cache_free(requestq_cachep, q);
 }
 
-void blk_put_queue(request_queue_t *q)
+void blk_put_queue(struct request_queue *q)
 {
 	kobject_put(&q->kobj);
 }
 EXPORT_SYMBOL(blk_put_queue);
 
-void blk_cleanup_queue(request_queue_t * q)
+void blk_cleanup_queue(struct request_queue * q)
 {
 	mutex_lock(&q->sysfs_lock);
 	set_bit(QUEUE_FLAG_DEAD, &q->queue_flags);
@@ -1798,7 +1803,7 @@ void blk_cleanup_queue(request_queue_t * q)
 
 EXPORT_SYMBOL(blk_cleanup_queue);
 
-static int blk_init_free_list(request_queue_t *q)
+static int blk_init_free_list(struct request_queue *q)
 {
 	struct request_list *rl = &q->rq;
 
@@ -1817,7 +1822,7 @@ static int blk_init_free_list(request_queue_t *q)
 	return 0;
 }
 
-request_queue_t *blk_alloc_queue(gfp_t gfp_mask)
+struct request_queue *blk_alloc_queue(gfp_t gfp_mask)
 {
 	return blk_alloc_queue_node(gfp_mask, -1);
 }
@@ -1825,9 +1830,9 @@ EXPORT_SYMBOL(blk_alloc_queue);
 
 static struct kobj_type queue_ktype;
 
-request_queue_t *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
+struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
 {
-	request_queue_t *q;
+	struct request_queue *q;
 
 	q = kmem_cache_alloc_node(requestq_cachep,
 				gfp_mask | __GFP_ZERO, node_id);
@@ -1882,16 +1887,16 @@ EXPORT_SYMBOL(blk_alloc_queue_node);
  *    when the block device is deactivated (such as at module unload).
  **/
 
-request_queue_t *blk_init_queue(request_fn_proc *rfn, spinlock_t *lock)
+struct request_queue *blk_init_queue(request_fn_proc *rfn, spinlock_t *lock)
 {
 	return blk_init_queue_node(rfn, lock, -1);
 }
 EXPORT_SYMBOL(blk_init_queue);
 
-request_queue_t *
+struct request_queue *
 blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
 {
-	request_queue_t *q = blk_alloc_queue_node(GFP_KERNEL, node_id);
+	struct request_queue *q = blk_alloc_queue_node(GFP_KERNEL, node_id);
 
 	if (!q)
 		return NULL;
@@ -1940,7 +1945,7 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
 }
 EXPORT_SYMBOL(blk_init_queue_node);
 
-int blk_get_queue(request_queue_t *q)
+int blk_get_queue(struct request_queue *q)
 {
 	if (likely(!test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
 		kobject_get(&q->kobj);
@@ -1952,7 +1957,7 @@ int blk_get_queue(request_queue_t *q)
 
 EXPORT_SYMBOL(blk_get_queue);
 
-static inline void blk_free_request(request_queue_t *q, struct request *rq)
+static inline void blk_free_request(struct request_queue *q, struct request *rq)
 {
 	if (rq->cmd_flags & REQ_ELVPRIV)
 		elv_put_request(q, rq);
@@ -1960,7 +1965,7 @@ static inline void blk_free_request(request_queue_t *q, struct request *rq)
 }
 
 static struct request *
-blk_alloc_request(request_queue_t *q, int rw, int priv, gfp_t gfp_mask)
+blk_alloc_request(struct request_queue *q, int rw, int priv, gfp_t gfp_mask)
 {
 	struct request *rq = mempool_alloc(q->rq.rq_pool, gfp_mask);
 
@@ -1988,7 +1993,7 @@ blk_alloc_request(request_queue_t *q, int rw, int priv, gfp_t gfp_mask)
  * ioc_batching returns true if the ioc is a valid batching request and
  * should be given priority access to a request.
  */
-static inline int ioc_batching(request_queue_t *q, struct io_context *ioc)
+static inline int ioc_batching(struct request_queue *q, struct io_context *ioc)
 {
 	if (!ioc)
 		return 0;
@@ -2009,7 +2014,7 @@ static inline int ioc_batching(request_queue_t *q, struct io_context *ioc)
  * is the behaviour we want though - once it gets a wakeup it should be given
  * a nice run.
  */
-static void ioc_set_batching(request_queue_t *q, struct io_context *ioc)
+static void ioc_set_batching(struct request_queue *q, struct io_context *ioc)
 {
 	if (!ioc || ioc_batching(q, ioc))
 		return;
@@ -2018,7 +2023,7 @@ static void ioc_set_batching(request_queue_t *q, struct io_context *ioc)
 	ioc->last_waited = jiffies;
 }
 
-static void __freed_request(request_queue_t *q, int rw)
+static void __freed_request(struct request_queue *q, int rw)
 {
 	struct request_list *rl = &q->rq;
 
@@ -2037,7 +2042,7 @@ static void __freed_request(request_queue_t *q, int rw)
  * A request has just been released.  Account for it, update the full and
  * congestion status, wake up any waiters.   Called under q->queue_lock.
  */
-static void freed_request(request_queue_t *q, int rw, int priv)
+static void freed_request(struct request_queue *q, int rw, int priv)
 {
 	struct request_list *rl = &q->rq;
 
@@ -2057,7 +2062,7 @@ static void freed_request(request_queue_t *q, int rw, int priv)
  * Returns NULL on failure, with queue_lock held.
  * Returns !NULL on success, with queue_lock *not held*.
  */
-static struct request *get_request(request_queue_t *q, int rw_flags,
+static struct request *get_request(struct request_queue *q, int rw_flags,
 				   struct bio *bio, gfp_t gfp_mask)
 {
 	struct request *rq = NULL;
@@ -2162,7 +2167,7 @@ out:
  *
  * Called with q->queue_lock held, and returns with it unlocked.
  */
-static struct request *get_request_wait(request_queue_t *q, int rw_flags,
+static struct request *get_request_wait(struct request_queue *q, int rw_flags,
 					struct bio *bio)
 {
 	const int rw = rw_flags & 0x01;
@@ -2204,7 +2209,7 @@ static struct request *get_request_wait(request_queue_t *q, int rw_flags,
 	return rq;
 }
 
-struct request *blk_get_request(request_queue_t *q, int rw, gfp_t gfp_mask)
+struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask)
 {
 	struct request *rq;
 
@@ -2234,7 +2239,7 @@ EXPORT_SYMBOL(blk_get_request);
  *
  * The queue lock must be held with interrupts disabled.
  */
-void blk_start_queueing(request_queue_t *q)
+void blk_start_queueing(struct request_queue *q)
 {
 	if (!blk_queue_plugged(q))
 		q->request_fn(q);
@@ -2253,7 +2258,7 @@ EXPORT_SYMBOL(blk_start_queueing);
  *    more, when that condition happens we need to put the request back
  *    on the queue. Must be called with queue lock held.
  */
-void blk_requeue_request(request_queue_t *q, struct request *rq)
+void blk_requeue_request(struct request_queue *q, struct request *rq)
 {
 	blk_add_trace_rq(q, rq, BLK_TA_REQUEUE);
 
@@ -2284,7 +2289,7 @@ EXPORT_SYMBOL(blk_requeue_request);
  *    of the queue for things like a QUEUE_FULL message from a device, or a
  *    host that is unable to accept a particular command.
  */
-void blk_insert_request(request_queue_t *q, struct request *rq,
+void blk_insert_request(struct request_queue *q, struct request *rq,
 			int at_head, void *data)
 {
 	int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
@@ -2330,7 +2335,7 @@ static int __blk_rq_unmap_user(struct bio *bio)
 	return ret;
 }
 
-static int __blk_rq_map_user(request_queue_t *q, struct request *rq,
+static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
 			     void __user *ubuf, unsigned int len)
 {
 	unsigned long uaddr;
@@ -2403,8 +2408,8 @@ unmap_bio:
  *    original bio must be passed back in to blk_rq_unmap_user() for proper
  *    unmapping.
  */
-int blk_rq_map_user(request_queue_t *q, struct request *rq, void __user *ubuf,
-		    unsigned long len)
+int blk_rq_map_user(struct request_queue *q, struct request *rq,
+		    void __user *ubuf, unsigned long len)
 {
 	unsigned long bytes_read = 0;
 	struct bio *bio = NULL;
@@ -2470,7 +2475,7 @@ EXPORT_SYMBOL(blk_rq_map_user);
  *    original bio must be passed back in to blk_rq_unmap_user() for proper
  *    unmapping.
  */
-int blk_rq_map_user_iov(request_queue_t *q, struct request *rq,
+int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
 			struct sg_iovec *iov, int iov_count, unsigned int len)
 {
 	struct bio *bio;
@@ -2540,7 +2545,7 @@ EXPORT_SYMBOL(blk_rq_unmap_user);
  * @len:	length of user data
  * @gfp_mask:	memory allocation flags
  */
-int blk_rq_map_kern(request_queue_t *q, struct request *rq, void *kbuf,
+int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
 		    unsigned int len, gfp_t gfp_mask)
 {
 	struct bio *bio;
@@ -2577,7 +2582,7 @@ EXPORT_SYMBOL(blk_rq_map_kern);
  *    Insert a fully prepared request at the back of the io scheduler queue
  *    for execution.  Don't wait for completion.
  */
-void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
+void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
 			   struct request *rq, int at_head,
 			   rq_end_io_fn *done)
 {
@@ -2605,7 +2610,7 @@ EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
  *    Insert a fully prepared request at the back of the io scheduler queue
  *    for execution and wait for completion.
  */
-int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
+int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
 		   struct request *rq, int at_head)
 {
 	DECLARE_COMPLETION_ONSTACK(wait);
@@ -2648,7 +2653,7 @@ EXPORT_SYMBOL(blk_execute_rq);
  */
 int blkdev_issue_flush(struct block_device *bdev, sector_t *error_sector)
 {
-	request_queue_t *q;
+	struct request_queue *q;
 
 	if (bdev->bd_disk == NULL)
 		return -ENXIO;
@@ -2684,7 +2689,7 @@ static void drive_stat_acct(struct request *rq, int nr_sectors, int new_io)
  * queue lock is held and interrupts disabled, as we muck with the
  * request queue list.
  */
-static inline void add_request(request_queue_t * q, struct request * req)
+static inline void add_request(struct request_queue * q, struct request * req)
 {
 	drive_stat_acct(req, req->nr_sectors, 1);
 
@@ -2730,7 +2735,7 @@ EXPORT_SYMBOL_GPL(disk_round_stats);
 /*
  * queue lock must be held
  */
-void __blk_put_request(request_queue_t *q, struct request *req)
+void __blk_put_request(struct request_queue *q, struct request *req)
 {
 	if (unlikely(!q))
 		return;
@@ -2760,7 +2765,7 @@ EXPORT_SYMBOL_GPL(__blk_put_request);
 void blk_put_request(struct request *req)
 {
 	unsigned long flags;
-	request_queue_t *q = req->q;
+	struct request_queue *q = req->q;
 
 	/*
 	 * Gee, IDE calls in w/ NULL q.  Fix IDE and remove the
@@ -2798,7 +2803,7 @@ EXPORT_SYMBOL(blk_end_sync_rq);
 /*
  * Has to be called with the request spinlock acquired
  */
-static int attempt_merge(request_queue_t *q, struct request *req,
+static int attempt_merge(struct request_queue *q, struct request *req,
 			  struct request *next)
 {
 	if (!rq_mergeable(req) || !rq_mergeable(next))
@@ -2851,7 +2856,8 @@ static int attempt_merge(request_queue_t *q, struct request *req,
 	return 1;
 }
 
-static inline int attempt_back_merge(request_queue_t *q, struct request *rq)
+static inline int attempt_back_merge(struct request_queue *q,
+				     struct request *rq)
 {
 	struct request *next = elv_latter_request(q, rq);
 
@@ -2861,7 +2867,8 @@ static inline int attempt_back_merge(request_queue_t *q, struct request *rq)
 	return 0;
 }
 
-static inline int attempt_front_merge(request_queue_t *q, struct request *rq)
+static inline int attempt_front_merge(struct request_queue *q,
+				      struct request *rq)
 {
 	struct request *prev = elv_former_request(q, rq);
 
@@ -2905,7 +2912,7 @@ static void init_request_from_bio(struct request *req, struct bio *bio)
 	req->start_time = jiffies;
 }
 
-static int __make_request(request_queue_t *q, struct bio *bio)
+static int __make_request(struct request_queue *q, struct bio *bio)
 {
 	struct request *req;
 	int el_ret, nr_sectors, barrier, err;
@@ -3119,7 +3126,7 @@ static inline int should_fail_request(struct bio *bio)
  */
 static inline void __generic_make_request(struct bio *bio)
 {
-	request_queue_t *q;
+	struct request_queue *q;
 	sector_t maxsector;
 	sector_t old_sector;
 	int ret, nr_sectors = bio_sectors(bio);
@@ -3312,7 +3319,7 @@ static void blk_recalc_rq_segments(struct request *rq)
 	struct bio *bio, *prevbio = NULL;
 	int nr_phys_segs, nr_hw_segs;
 	unsigned int phys_size, hw_size;
-	request_queue_t *q = rq->q;
+	struct request_queue *q = rq->q;
 
 	if (!rq->bio)
 		return;
@@ -3658,7 +3665,8 @@ void end_request(struct request *req, int uptodate)
 
 EXPORT_SYMBOL(end_request);
 
-void blk_rq_bio_prep(request_queue_t *q, struct request *rq, struct bio *bio)
+void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
+		     struct bio *bio)
 {
 	/* first two bits are identical in rq->cmd_flags and bio->bi_rw */
 	rq->cmd_flags |= (bio->bi_rw & 3);
@@ -3701,7 +3709,7 @@ int __init blk_dev_init(void)
 			sizeof(struct request), 0, SLAB_PANIC, NULL);
 
 	requestq_cachep = kmem_cache_create("blkdev_queue",
-			sizeof(request_queue_t), 0, SLAB_PANIC, NULL);
+			sizeof(struct request_queue), 0, SLAB_PANIC, NULL);
 
 	iocontext_cachep = kmem_cache_create("blkdev_ioc",
 			sizeof(struct io_context), 0, SLAB_PANIC, NULL);
@@ -4021,7 +4029,8 @@ static ssize_t
 queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
 {
 	struct queue_sysfs_entry *entry = to_queue(attr);
-	request_queue_t *q = container_of(kobj, struct request_queue, kobj);
+	struct request_queue *q =
+		container_of(kobj, struct request_queue, kobj);
 	ssize_t res;
 
 	if (!entry->show)
@@ -4041,7 +4050,7 @@ queue_attr_store(struct kobject *kobj, struct attribute *attr,
 		    const char *page, size_t length)
 {
 	struct queue_sysfs_entry *entry = to_queue(attr);
-	request_queue_t *q = container_of(kobj, struct request_queue, kobj);
+	struct request_queue *q = container_of(kobj, struct request_queue, kobj);
 
 	ssize_t res;
 
@@ -4072,7 +4081,7 @@ int blk_register_queue(struct gendisk *disk)
 {
 	int ret;
 
-	request_queue_t *q = disk->queue;
+	struct request_queue *q = disk->queue;
 
 	if (!q || !q->request_fn)
 		return -ENXIO;
@@ -4097,7 +4106,7 @@ int blk_register_queue(struct gendisk *disk)
 
 void blk_unregister_queue(struct gendisk *disk)
 {
-	request_queue_t *q = disk->queue;
+	struct request_queue *q = disk->queue;
 
 	if (q && q->request_fn) {
 		elv_unregister_queue(q);
diff --git a/block/noop-iosched.c b/block/noop-iosched.c
index 1c3de2b9a6b..7563d8aa394 100644
--- a/block/noop-iosched.c
+++ b/block/noop-iosched.c
@@ -11,13 +11,13 @@ struct noop_data {
 	struct list_head queue;
 };
 
-static void noop_merged_requests(request_queue_t *q, struct request *rq,
+static void noop_merged_requests(struct request_queue *q, struct request *rq,
 				 struct request *next)
 {
 	list_del_init(&next->queuelist);
 }
 
-static int noop_dispatch(request_queue_t *q, int force)
+static int noop_dispatch(struct request_queue *q, int force)
 {
 	struct noop_data *nd = q->elevator->elevator_data;
 
@@ -31,14 +31,14 @@ static int noop_dispatch(request_queue_t *q, int force)
 	return 0;
 }
 
-static void noop_add_request(request_queue_t *q, struct request *rq)
+static void noop_add_request(struct request_queue *q, struct request *rq)
 {
 	struct noop_data *nd = q->elevator->elevator_data;
 
 	list_add_tail(&rq->queuelist, &nd->queue);
 }
 
-static int noop_queue_empty(request_queue_t *q)
+static int noop_queue_empty(struct request_queue *q)
 {
 	struct noop_data *nd = q->elevator->elevator_data;
 
@@ -46,7 +46,7 @@ static int noop_queue_empty(request_queue_t *q)
 }
 
 static struct request *
-noop_former_request(request_queue_t *q, struct request *rq)
+noop_former_request(struct request_queue *q, struct request *rq)
 {
 	struct noop_data *nd = q->elevator->elevator_data;
 
@@ -56,7 +56,7 @@ noop_former_request(request_queue_t *q, struct request *rq)
 }
 
 static struct request *
-noop_latter_request(request_queue_t *q, struct request *rq)
+noop_latter_request(struct request_queue *q, struct request *rq)
 {
 	struct noop_data *nd = q->elevator->elevator_data;
 
@@ -65,7 +65,7 @@ noop_latter_request(request_queue_t *q, struct request *rq)
 	return list_entry(rq->queuelist.next, struct request, queuelist);
 }
 
-static void *noop_init_queue(request_queue_t *q)
+static void *noop_init_queue(struct request_queue *q)
 {
 	struct noop_data *nd;
 
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index d359a715bbc..91c73224f4c 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -49,22 +49,22 @@ static int sg_get_version(int __user *p)
 	return put_user(sg_version_num, p);
 }
 
-static int scsi_get_idlun(request_queue_t *q, int __user *p)
+static int scsi_get_idlun(struct request_queue *q, int __user *p)
 {
 	return put_user(0, p);
 }
 
-static int scsi_get_bus(request_queue_t *q, int __user *p)
+static int scsi_get_bus(struct request_queue *q, int __user *p)
 {
 	return put_user(0, p);
 }
 
-static int sg_get_timeout(request_queue_t *q)
+static int sg_get_timeout(struct request_queue *q)
 {
 	return q->sg_timeout / (HZ / USER_HZ);
 }
 
-static int sg_set_timeout(request_queue_t *q, int __user *p)
+static int sg_set_timeout(struct request_queue *q, int __user *p)
 {
 	int timeout, err = get_user(timeout, p);
 
@@ -74,14 +74,14 @@ static int sg_set_timeout(request_queue_t *q, int __user *p)
 	return err;
 }
 
-static int sg_get_reserved_size(request_queue_t *q, int __user *p)
+static int sg_get_reserved_size(struct request_queue *q, int __user *p)
 {
 	unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
 
 	return put_user(val, p);
 }
 
-static int sg_set_reserved_size(request_queue_t *q, int __user *p)
+static int sg_set_reserved_size(struct request_queue *q, int __user *p)
 {
 	int size, err = get_user(size, p);
 
@@ -101,7 +101,7 @@ static int sg_set_reserved_size(request_queue_t *q, int __user *p)
  * will always return that we are ATAPI even for a real SCSI drive, I'm not
  * so sure this is worth doing anything about (why would you care??)
  */
-static int sg_emulated_host(request_queue_t *q, int __user *p)
+static int sg_emulated_host(struct request_queue *q, int __user *p)
 {
 	return put_user(1, p);
 }
@@ -214,7 +214,7 @@ int blk_verify_command(unsigned char *cmd, int has_write_perm)
 }
 EXPORT_SYMBOL_GPL(blk_verify_command);
 
-static int blk_fill_sghdr_rq(request_queue_t *q, struct request *rq,
+static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
 			     struct sg_io_hdr *hdr, int has_write_perm)
 {
 	memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
@@ -286,7 +286,7 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
 	return r;
 }
 
-static int sg_io(struct file *file, request_queue_t *q,
+static int sg_io(struct file *file, struct request_queue *q,
 		struct gendisk *bd_disk, struct sg_io_hdr *hdr)
 {
 	unsigned long start_time;
@@ -519,7 +519,8 @@ error:
 EXPORT_SYMBOL_GPL(sg_scsi_ioctl);
 
 /* Send basic block requests */
-static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int cmd, int data)
+static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
+			      int cmd, int data)
 {
 	struct request *rq;
 	int err;
@@ -539,7 +540,8 @@ static int __blk_send_generic(request_queue_t *q, struct gendisk *bd_disk, int c
 	return err;
 }
 
-static inline int blk_send_start_stop(request_queue_t *q, struct gendisk *bd_disk, int data)
+static inline int blk_send_start_stop(struct request_queue *q,
+				      struct gendisk *bd_disk, int data)
 {
 	return __blk_send_generic(q, bd_disk, GPCMD_START_STOP_UNIT, data);
 }
diff --git a/drivers/acorn/block/fd1772.c b/drivers/acorn/block/fd1772.c
index 423ed08fb6f..d7e18ce8dad 100644
--- a/drivers/acorn/block/fd1772.c
+++ b/drivers/acorn/block/fd1772.c
@@ -372,7 +372,7 @@ static int fd_test_drive_present(int drive);
 static void config_types(void);
 static int floppy_open(struct inode *inode, struct file *filp);
 static int floppy_release(struct inode *inode, struct file *filp);
-static void do_fd_request(request_queue_t *);
+static void do_fd_request(struct request_queue *);
 
 /************************* End of Prototypes **************************/
 
@@ -1271,7 +1271,7 @@ static void fd1772_checkint(void)
 	}
 }
 
-static void do_fd_request(request_queue_t* q)
+static void do_fd_request(struct request_queue* q)
 {
 	unsigned long flags;
 
diff --git a/drivers/acorn/block/mfmhd.c b/drivers/acorn/block/mfmhd.c
index d85520f78e6..74058db674d 100644
--- a/drivers/acorn/block/mfmhd.c
+++ b/drivers/acorn/block/mfmhd.c
@@ -924,7 +924,7 @@ static void mfm_request(void)
 	DBG("mfm_request: Dropping out bottom\n");
 }
 
-static void do_mfm_request(request_queue_t *q)
+static void do_mfm_request(struct request_queue *q)
 {
 	DBG("do_mfm_request: about to mfm_request\n");
 	mfm_request();
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 12ac0b511f7..e83647651b3 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -768,7 +768,7 @@ static void ata_scsi_dev_config(struct scsi_device *sdev,
 	 * Decrement max hw segments accordingly.
 	 */
 	if (dev->class == ATA_DEV_ATAPI) {
-		request_queue_t *q = sdev->request_queue;
+		struct request_queue *q = sdev->request_queue;
 		blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
 	}
 
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 6ce8b897e26..c9751b2b57e 100644
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -1422,7 +1422,7 @@ static void redo_fd_request(void)
 	goto repeat;
 }
 
-static void do_fd_request(request_queue_t * q)
+static void do_fd_request(struct request_queue * q)
 {
 	redo_fd_request();
 }
diff --git a/drivers/block/aoe/aoe.h b/drivers/block/aoe/aoe.h
index 1d846681794..ba07f762c4c 100644
--- a/drivers/block/aoe/aoe.h
+++ b/drivers/block/aoe/aoe.h
@@ -138,7 +138,7 @@ struct aoedev {
 	u16 maxbcnt;
 	struct work_struct work;/* disk create work struct */
 	struct gendisk *gd;
-	request_queue_t blkq;
+	struct request_queue blkq;
 	struct hd_geometry geo; 
 	sector_t ssize;
 	struct timer_list timer;
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 4f598270fa3..007faaf008e 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -125,7 +125,7 @@ aoeblk_release(struct inode *inode, struct file *filp)
 }
 
 static int
-aoeblk_make_request(request_queue_t *q, struct bio *bio)
+aoeblk_make_request(struct request_queue *q, struct bio *bio)
 {
 	struct aoedev *d;
 	struct buf *buf;
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 14d6b949275..94268c75d04 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -1466,7 +1466,7 @@ repeat:
 }
 
 
-void do_fd_request(request_queue_t * q)
+void do_fd_request(struct request_queue * q)
 {
  	unsigned long flags;
 
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index a2d6612b80d..1be82d544dc 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -139,7 +139,7 @@ static struct board_type products[] = {
 
 static ctlr_info_t *hba[MAX_CTLR];
 
-static void do_cciss_request(request_queue_t *q);
+static void do_cciss_request(struct request_queue *q);
 static irqreturn_t do_cciss_intr(int irq, void *dev_id);
 static int cciss_open(struct inode *inode, struct file *filep);
 static int cciss_release(struct inode *inode, struct file *filep);
@@ -1584,7 +1584,7 @@ static int deregister_disk(struct gendisk *disk, drive_info_struct *drv,
 	 */
 	if (h->gendisk[0] != disk) {
 		if (disk) {
-			request_queue_t *q = disk->queue;
+			struct request_queue *q = disk->queue;
 			if (disk->flags & GENHD_FL_UP)
 				del_gendisk(disk);
 			if (q) {
@@ -2511,7 +2511,7 @@ after_error_processing:
 /*
  * Get a request and submit it to the controller.
  */
-static void do_cciss_request(request_queue_t *q)
+static void do_cciss_request(struct request_queue *q)
 {
 	ctlr_info_t *h = q->queuedata;
 	CommandList_struct *c;
@@ -3380,7 +3380,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
 	do {
 		drive_info_struct *drv = &(hba[i]->drv[j]);
 		struct gendisk *disk = hba[i]->gendisk[j];
-		request_queue_t *q;
+		struct request_queue *q;
 
 		/* Check if the disk was allocated already */
 		if (!disk){
@@ -3523,7 +3523,7 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev)
 	for (j = 0; j < CISS_MAX_LUN; j++) {
 		struct gendisk *disk = hba[i]->gendisk[j];
 		if (disk) {
-			request_queue_t *q = disk->queue;
+			struct request_queue *q = disk->queue;
 
 			if (disk->flags & GENHD_FL_UP)
 				del_gendisk(disk);
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index b94cd1c3213..be4e3477d83 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -161,7 +161,7 @@ static int ida_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
 static int ida_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io);
 
-static void do_ida_request(request_queue_t *q);
+static void do_ida_request(struct request_queue *q);
 static void start_io(ctlr_info_t *h);
 
 static inline void addQ(cmdlist_t **Qptr, cmdlist_t *c);
@@ -391,7 +391,7 @@ static void __devexit cpqarray_remove_one_eisa (int i)
 /* pdev is NULL for eisa */
 static int __init cpqarray_register_ctlr( int i, struct pci_dev *pdev)
 {
-	request_queue_t *q;
+	struct request_queue *q;
 	int j;
 
 	/* 
@@ -886,7 +886,7 @@ static inline cmdlist_t *removeQ(cmdlist_t **Qptr, cmdlist_t *c)
  * are in here (either via the dummy do_ida_request functions or by being
  * called from the interrupt handler
  */
-static void do_ida_request(request_queue_t *q)
+static void do_ida_request(struct request_queue *q)
 {
 	ctlr_info_t *h = q->queuedata;
 	cmdlist_t *c;
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index fe088045dd0..085b7794fb3 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -251,7 +251,7 @@ static int irqdma_allocated;
 
 static struct request *current_req;
 static struct request_queue *floppy_queue;
-static void do_fd_request(request_queue_t * q);
+static void do_fd_request(struct request_queue * q);
 
 #ifndef fd_get_dma_residue
 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
@@ -2981,7 +2981,7 @@ static void process_fd_request(void)
 	schedule_bh(redo_fd_request);
 }
 
-static void do_fd_request(request_queue_t * q)
+static void do_fd_request(struct request_queue * q)
 {
 	if (max_buffer_sectors == 0) {
 		printk("VFS: do_fd_request called on non-open device\n");
diff --git a/drivers/block/lguest_blk.c b/drivers/block/lguest_blk.c
index 1634c2dd25e..5b79d072417 100644
--- a/drivers/block/lguest_blk.c
+++ b/drivers/block/lguest_blk.c
@@ -137,7 +137,7 @@ static void do_read(struct blockdev *bd, struct request *req)
 	lguest_send_dma(bd->phys_addr, &ping);
 }
 
-static void do_lgb_request(request_queue_t *q)
+static void do_lgb_request(struct request_queue *q)
 {
 	struct blockdev *bd;
 	struct request *req;
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index e425daa1eac..9f015fce413 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -529,7 +529,7 @@ static struct bio *loop_get_bio(struct loop_device *lo)
 	return bio;
 }
 
-static int loop_make_request(request_queue_t *q, struct bio *old_bio)
+static int loop_make_request(struct request_queue *q, struct bio *old_bio)
 {
 	struct loop_device *lo = q->queuedata;
 	int rw = bio_rw(old_bio);
@@ -558,7 +558,7 @@ out:
 /*
  * kick off io on the underlying address space
  */
-static void loop_unplug(request_queue_t *q)
+static void loop_unplug(struct request_queue *q)
 {
 	struct loop_device *lo = q->queuedata;
 
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index c1295102409..be92c658f06 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -100,7 +100,7 @@ static const char *nbdcmd_to_ascii(int cmd)
 static void nbd_end_request(struct request *req)
 {
 	int uptodate = (req->errors == 0) ? 1 : 0;
-	request_queue_t *q = req->q;
+	struct request_queue *q = req->q;
 	unsigned long flags;
 
 	dprintk(DBG_BLKDEV, "%s: request %p: %s\n", req->rq_disk->disk_name,
@@ -410,7 +410,7 @@ static void nbd_clear_que(struct nbd_device *lo)
  *   { printk( "Warning: Ignoring result!\n"); nbd_end_request( req ); }
  */
 
-static void do_nbd_request(request_queue_t * q)
+static void do_nbd_request(struct request_queue * q)
 {
 	struct request *req;
 	
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index 1eeb8f2cde7..b8a994a2b01 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -183,7 +183,7 @@ static int pcd_packet(struct cdrom_device_info *cdi,
 static int pcd_detect(void);
 static void pcd_probe_capabilities(void);
 static void do_pcd_read_drq(void);
-static void do_pcd_request(request_queue_t * q);
+static void do_pcd_request(struct request_queue * q);
 static void do_pcd_read(void);
 
 struct pcd_unit {
@@ -713,7 +713,7 @@ static int pcd_detect(void)
 /* I/O request processing */
 static struct request_queue *pcd_queue;
 
-static void do_pcd_request(request_queue_t * q)
+static void do_pcd_request(struct request_queue * q)
 {
 	if (pcd_busy)
 		return;
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index 31e01488eb5..df819f8a95a 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -698,7 +698,7 @@ static enum action pd_identify(struct pd_unit *disk)
 
 /* end of io request engine */
 
-static void do_pd_request(request_queue_t * q)
+static void do_pd_request(struct request_queue * q)
 {
 	if (pd_req)
 		return;
diff --git a/drivers/block/paride/pf.c b/drivers/block/paride/pf.c
index 5826508f673..ceffa6034e2 100644
--- a/drivers/block/paride/pf.c
+++ b/drivers/block/paride/pf.c
@@ -202,7 +202,7 @@ module_param_array(drive3, int, NULL, 0);
 #define ATAPI_WRITE_10		0x2a
 
 static int pf_open(struct inode *inode, struct file *file);
-static void do_pf_request(request_queue_t * q);
+static void do_pf_request(struct request_queue * q);
 static int pf_ioctl(struct inode *inode, struct file *file,
 		    unsigned int cmd, unsigned long arg);
 static int pf_getgeo(struct block_device *bdev, struct hd_geometry *geo);
@@ -760,7 +760,7 @@ static void pf_end_request(int uptodate)
 	}
 }
 
-static void do_pf_request(request_queue_t * q)
+static void do_pf_request(struct request_queue * q)
 {
 	if (pf_busy)
 		return;
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 31be33e4f11..fadbfd880ba 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -752,7 +752,7 @@ static inline struct bio *pkt_get_list_first(struct bio **list_head, struct bio
  */
 static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *cgc)
 {
-	request_queue_t *q = bdev_get_queue(pd->bdev);
+	struct request_queue *q = bdev_get_queue(pd->bdev);
 	struct request *rq;
 	int ret = 0;
 
@@ -979,7 +979,7 @@ static void pkt_iosched_process_queue(struct pktcdvd_device *pd)
  * Special care is needed if the underlying block device has a small
  * max_phys_segments value.
  */
-static int pkt_set_segment_merging(struct pktcdvd_device *pd, request_queue_t *q)
+static int pkt_set_segment_merging(struct pktcdvd_device *pd, struct request_queue *q)
 {
 	if ((pd->settings.size << 9) / CD_FRAMESIZE <= q->max_phys_segments) {
 		/*
@@ -2314,7 +2314,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, int write)
 {
 	int ret;
 	long lba;
-	request_queue_t *q;
+	struct request_queue *q;
 
 	/*
 	 * We need to re-open the cdrom device without O_NONBLOCK to be able
@@ -2477,7 +2477,7 @@ static int pkt_end_io_read_cloned(struct bio *bio, unsigned int bytes_done, int
 	return 0;
 }
 
-static int pkt_make_request(request_queue_t *q, struct bio *bio)
+static int pkt_make_request(struct request_queue *q, struct bio *bio)
 {
 	struct pktcdvd_device *pd;
 	char b[BDEVNAME_SIZE];
@@ -2626,7 +2626,7 @@ end_io:
 
 
 
-static int pkt_merge_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *bvec)
+static int pkt_merge_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *bvec)
 {
 	struct pktcdvd_device *pd = q->queuedata;
 	sector_t zone = ZONE(bio->bi_sector, pd);
@@ -2647,7 +2647,7 @@ static int pkt_merge_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *b
 
 static void pkt_init_queue(struct pktcdvd_device *pd)
 {
-	request_queue_t *q = pd->disk->queue;
+	struct request_queue *q = pd->disk->queue;
 
 	blk_queue_make_request(q, pkt_make_request);
 	blk_queue_hardsect_size(q, CD_FRAMESIZE);
diff --git a/drivers/block/ps2esdi.c b/drivers/block/ps2esdi.c
index 688a4fb0dc9..3c796e23625 100644
--- a/drivers/block/ps2esdi.c
+++ b/drivers/block/ps2esdi.c
@@ -64,7 +64,7 @@ static void reset_ctrl(void);
 
 static int ps2esdi_geninit(void);
 
-static void do_ps2esdi_request(request_queue_t * q);
+static void do_ps2esdi_request(struct request_queue * q);
 
 static void ps2esdi_readwrite(int cmd, struct request *req);
 
@@ -473,7 +473,7 @@ static void __init ps2esdi_get_device_cfg(void)
 }
 
 /* strategy routine that handles most of the IO requests */
-static void do_ps2esdi_request(request_queue_t * q)
+static void do_ps2esdi_request(struct request_queue * q)
 {
 	struct request *req;
 	/* since, this routine is called with interrupts cleared - they 
diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
index 170fb33dba9..aa8b890c80d 100644
--- a/drivers/block/ps3disk.c
+++ b/drivers/block/ps3disk.c
@@ -190,7 +190,7 @@ static int ps3disk_submit_flush_request(struct ps3_storage_device *dev,
 }
 
 static void ps3disk_do_request(struct ps3_storage_device *dev,
-			       request_queue_t *q)
+			       struct request_queue *q)
 {
 	struct request *req;
 
@@ -211,7 +211,7 @@ static void ps3disk_do_request(struct ps3_storage_device *dev,
 	}
 }
 
-static void ps3disk_request(request_queue_t *q)
+static void ps3disk_request(struct request_queue *q)
 {
 	struct ps3_storage_device *dev = q->queuedata;
 	struct ps3disk_private *priv = dev->sbd.core.driver_data;
@@ -404,7 +404,7 @@ static int ps3disk_identify(struct ps3_storage_device *dev)
 	return 0;
 }
 
-static void ps3disk_prepare_flush(request_queue_t *q, struct request *req)
+static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
 {
 	struct ps3_storage_device *dev = q->queuedata;
 
@@ -414,7 +414,7 @@ static void ps3disk_prepare_flush(request_queue_t *q, struct request *req)
 	req->cmd_type = REQ_TYPE_FLUSH;
 }
 
-static int ps3disk_issue_flush(request_queue_t *q, struct gendisk *gendisk,
+static int ps3disk_issue_flush(struct request_queue *q, struct gendisk *gendisk,
 			       sector_t *sector)
 {
 	struct ps3_storage_device *dev = q->queuedata;
diff --git a/drivers/block/rd.c b/drivers/block/rd.c
index a1512da3241..65150b548f3 100644
--- a/drivers/block/rd.c
+++ b/drivers/block/rd.c
@@ -264,7 +264,7 @@ static int rd_blkdev_pagecache_IO(int rw, struct bio_vec *vec, sector_t sector,
  * 19-JAN-1998  Richard Gooch <rgooch@atnf.csiro.au>  Added devfs support
  *
  */
-static int rd_make_request(request_queue_t *q, struct bio *bio)
+static int rd_make_request(struct request_queue *q, struct bio *bio)
 {
 	struct block_device *bdev = bio->bi_bdev;
 	struct address_space * mapping = bdev->bd_inode->i_mapping;
diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index d50b8238115..4dff49256ac 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -444,7 +444,7 @@ out:
 	return err;
 }
 
-static void do_vdc_request(request_queue_t *q)
+static void do_vdc_request(struct request_queue *q)
 {
 	while (1) {
 		struct request *req = elv_next_request(q);
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 1a65979f1f0..b4e462f154e 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -225,7 +225,7 @@ static unsigned short write_postamble[] = {
 static void swim3_select(struct floppy_state *fs, int sel);
 static void swim3_action(struct floppy_state *fs, int action);
 static int swim3_readbit(struct floppy_state *fs, int bit);
-static void do_fd_request(request_queue_t * q);
+static void do_fd_request(struct request_queue * q);
 static void start_request(struct floppy_state *fs);
 static void set_timeout(struct floppy_state *fs, int nticks,
 			void (*proc)(unsigned long));
@@ -290,7 +290,7 @@ static int swim3_readbit(struct floppy_state *fs, int bit)
 	return (stat & DATA) == 0;
 }
 
-static void do_fd_request(request_queue_t * q)
+static void do_fd_request(struct request_queue * q)
 {
 	int i;
 	for(i=0;i<floppy_count;i++)
diff --git a/drivers/block/sx8.c b/drivers/block/sx8.c
index 949ae93499e..402209fec59 100644
--- a/drivers/block/sx8.c
+++ b/drivers/block/sx8.c
@@ -278,7 +278,7 @@ struct carm_host {
 	unsigned int			state;
 	u32				fw_ver;
 
-	request_queue_t			*oob_q;
+	struct request_queue		*oob_q;
 	unsigned int			n_oob;
 
 	unsigned int			hw_sg_used;
@@ -287,7 +287,7 @@ struct carm_host {
 
 	unsigned int			wait_q_prod;
 	unsigned int			wait_q_cons;
-	request_queue_t			*wait_q[CARM_MAX_WAIT_Q];
+	struct request_queue		*wait_q[CARM_MAX_WAIT_Q];
 
 	unsigned int			n_msgs;
 	u64				msg_alloc;
@@ -756,7 +756,7 @@ static inline void carm_end_request_queued(struct carm_host *host,
 	assert(rc == 0);
 }
 
-static inline void carm_push_q (struct carm_host *host, request_queue_t *q)
+static inline void carm_push_q (struct carm_host *host, struct request_queue *q)
 {
 	unsigned int idx = host->wait_q_prod % CARM_MAX_WAIT_Q;
 
@@ -768,7 +768,7 @@ static inline void carm_push_q (struct carm_host *host, request_queue_t *q)
 	BUG_ON(host->wait_q_prod == host->wait_q_cons); /* overrun */
 }
 
-static inline request_queue_t *carm_pop_q(struct carm_host *host)
+static inline struct request_queue *carm_pop_q(struct carm_host *host)
 {
 	unsigned int idx;
 
@@ -783,7 +783,7 @@ static inline request_queue_t *carm_pop_q(struct carm_host *host)
 
 static inline void carm_round_robin(struct carm_host *host)
 {
-	request_queue_t *q = carm_pop_q(host);
+	struct request_queue *q = carm_pop_q(host);
 	if (q) {
 		blk_start_queue(q);
 		VPRINTK("STARTED QUEUE %p\n", q);
@@ -802,7 +802,7 @@ static inline void carm_end_rq(struct carm_host *host, struct carm_request *crq,
 	}
 }
 
-static void carm_oob_rq_fn(request_queue_t *q)
+static void carm_oob_rq_fn(struct request_queue *q)
 {
 	struct carm_host *host = q->queuedata;
 	struct carm_request *crq;
@@ -833,7 +833,7 @@ static void carm_oob_rq_fn(request_queue_t *q)
 	}
 }
 
-static void carm_rq_fn(request_queue_t *q)
+static void carm_rq_fn(struct request_queue *q)
 {
 	struct carm_port *port = q->queuedata;
 	struct carm_host *host = port->host;
@@ -1494,7 +1494,7 @@ static int carm_init_disks(struct carm_host *host)
 
 	for (i = 0; i < CARM_MAX_PORTS; i++) {
 		struct gendisk *disk;
-		request_queue_t *q;
+		struct request_queue *q;
 		struct carm_port *port;
 
 		port = &host->port[i];
@@ -1538,7 +1538,7 @@ static void carm_free_disks(struct carm_host *host)
 	for (i = 0; i < CARM_MAX_PORTS; i++) {
 		struct gendisk *disk = host->port[i].disk;
 		if (disk) {
-			request_queue_t *q = disk->queue;
+			struct request_queue *q = disk->queue;
 
 			if (disk->flags & GENHD_FL_UP)
 				del_gendisk(disk);
@@ -1571,7 +1571,7 @@ static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct carm_host *host;
 	unsigned int pci_dac;
 	int rc;
-	request_queue_t *q;
+	struct request_queue *q;
 	unsigned int i;
 
 	if (!printed_version++)
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 8b13d7d2cb6..c57dd2b3a0c 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -503,7 +503,7 @@ static void ub_cleanup(struct ub_dev *sc)
 {
 	struct list_head *p;
 	struct ub_lun *lun;
-	request_queue_t *q;
+	struct request_queue *q;
 
 	while (!list_empty(&sc->luns)) {
 		p = sc->luns.next;
@@ -619,7 +619,7 @@ static struct ub_scsi_cmd *ub_cmdq_pop(struct ub_dev *sc)
  * The request function is our main entry point
  */
 
-static void ub_request_fn(request_queue_t *q)
+static void ub_request_fn(struct request_queue *q)
 {
 	struct ub_lun *lun = q->queuedata;
 	struct request *rq;
@@ -2273,7 +2273,7 @@ err_core:
 static int ub_probe_lun(struct ub_dev *sc, int lnum)
 {
 	struct ub_lun *lun;
-	request_queue_t *q;
+	struct request_queue *q;
 	struct gendisk *disk;
 	int rc;
 
diff --git a/drivers/block/umem.c b/drivers/block/umem.c
index dec74bd2349..6b7c02d6360 100644
--- a/drivers/block/umem.c
+++ b/drivers/block/umem.c
@@ -114,7 +114,7 @@ struct cardinfo {
 				    */
 	struct bio	*bio, *currentbio, **biotail;
 
-	request_queue_t *queue;
+	struct request_queue *queue;
 
 	struct mm_page {
 		dma_addr_t		page_dma;
@@ -357,7 +357,7 @@ static inline void reset_page(struct mm_page *page)
 	page->biotail = & page->bio;
 }
 
-static void mm_unplug_device(request_queue_t *q)
+static void mm_unplug_device(struct request_queue *q)
 {
 	struct cardinfo *card = q->queuedata;
 	unsigned long flags;
@@ -541,7 +541,7 @@ static void process_page(unsigned long data)
 --                              mm_make_request
 -----------------------------------------------------------------------------------
 */
-static int mm_make_request(request_queue_t *q, struct bio *bio)
+static int mm_make_request(struct request_queue *q, struct bio *bio)
 {
 	struct cardinfo *card = q->queuedata;
 	pr_debug("mm_make_request %llu %u\n",
diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
index dae39911a11..85916e2665d 100644
--- a/drivers/block/viodasd.c
+++ b/drivers/block/viodasd.c
@@ -400,7 +400,7 @@ error_ret:
 /*
  * This is the external request processing routine
  */
-static void do_viodasd_request(request_queue_t *q)
+static void do_viodasd_request(struct request_queue *q)
 {
 	struct request *req;
 
diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index 0d97b7eb818..624d30f7da3 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -298,7 +298,7 @@ static u_char __init xd_detect (u_char *controller, unsigned int *address)
 }
 
 /* do_xd_request: handle an incoming request */
-static void do_xd_request (request_queue_t * q)
+static void do_xd_request (struct request_queue * q)
 {
 	struct request *req;
 
diff --git a/drivers/block/xd.h b/drivers/block/xd.h
index 82e090fea95..cffd44a2038 100644
--- a/drivers/block/xd.h
+++ b/drivers/block/xd.h
@@ -104,7 +104,7 @@ static int xd_manual_geo_init (char *command);
 static u_char xd_detect (u_char *controller, unsigned int *address);
 static u_char xd_initdrives (void (*init_drive)(u_char drive));
 
-static void do_xd_request (request_queue_t * q);
+static void do_xd_request (struct request_queue * q);
 static int xd_ioctl (struct inode *inode,struct file *file,unsigned int cmd,unsigned long arg);
 static int xd_readwrite (u_char operation,XD_INFO *disk,char *buffer,u_int block,u_int count);
 static void xd_recalibrate (u_char drive);
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 6746c29181f..964e51634f2 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -241,7 +241,7 @@ static inline void flush_requests(struct blkfront_info *info)
  * do_blkif_request
  *  read a block; request is in a request queue
  */
-static void do_blkif_request(request_queue_t *rq)
+static void do_blkif_request(struct request_queue *rq)
 {
 	struct blkfront_info *info = NULL;
 	struct request *req;
@@ -287,7 +287,7 @@ wait:
 
 static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
 {
-	request_queue_t *rq;
+	struct request_queue *rq;
 
 	rq = blk_init_queue(do_blkif_request, &blkif_io_lock);
 	if (rq == NULL)
diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c
index 732ec63b6e9..cb27e8863d7 100644
--- a/drivers/block/xsysace.c
+++ b/drivers/block/xsysace.c
@@ -458,7 +458,7 @@ static inline void ace_fsm_yieldirq(struct ace_device *ace)
 }
 
 /* Get the next read/write request; ending requests that we don't handle */
-struct request *ace_get_next_request(request_queue_t * q)
+struct request *ace_get_next_request(struct request_queue * q)
 {
 	struct request *req;
 
@@ -825,7 +825,7 @@ static irqreturn_t ace_interrupt(int irq, void *dev_id)
 /* ---------------------------------------------------------------------
  * Block ops
  */
-static void ace_request(request_queue_t * q)
+static void ace_request(struct request_queue * q)
 {
 	struct request *req;
 	struct ace_device *ace;
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index e40fa98842e..2d5853cbd4b 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -67,7 +67,7 @@ static DEFINE_SPINLOCK(z2ram_lock);
 static struct block_device_operations z2_fops;
 static struct gendisk *z2ram_gendisk;
 
-static void do_z2_request(request_queue_t *q)
+static void do_z2_request(struct request_queue *q)
 {
 	struct request *req;
 	while ((req = elv_next_request(q)) != NULL) {
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 499019bf8f4..67ee3d4b287 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2094,7 +2094,7 @@ out:
 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
 			       int lba, int nframes)
 {
-	request_queue_t *q = cdi->disk->queue;
+	struct request_queue *q = cdi->disk->queue;
 	struct request *rq;
 	struct bio *bio;
 	unsigned int len;
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index 44cd7b2ddf0..e51550db157 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -398,7 +398,7 @@ static void viocd_end_request(struct request *req, int uptodate)
 
 static int rwreq;
 
-static void do_viocd_request(request_queue_t *q)
+static void do_viocd_request(struct request_queue *q)
 {
 	struct request *req;
 
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 1486eb212cc..ca843522f91 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -3071,7 +3071,7 @@ static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
 /*
  * standard prep_rq_fn that builds 10 byte cmds
  */
-static int ide_cdrom_prep_fs(request_queue_t *q, struct request *rq)
+static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
 {
 	int hard_sect = queue_hardsect_size(q);
 	long block = (long)rq->hard_sector / (hard_sect >> 9);
@@ -3137,7 +3137,7 @@ static int ide_cdrom_prep_pc(struct request *rq)
 	return BLKPREP_OK;
 }
 
-static int ide_cdrom_prep_fn(request_queue_t *q, struct request *rq)
+static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
 {
 	if (blk_fs_request(rq))
 		return ide_cdrom_prep_fs(q, rq);
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index b1304a7f3e0..5ce4216f72a 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -679,7 +679,7 @@ static ide_proc_entry_t idedisk_proc[] = {
 };
 #endif	/* CONFIG_IDE_PROC_FS */
 
-static void idedisk_prepare_flush(request_queue_t *q, struct request *rq)
+static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
 {
 	ide_drive_t *drive = q->queuedata;
 
@@ -697,7 +697,7 @@ static void idedisk_prepare_flush(request_queue_t *q, struct request *rq)
 	rq->buffer = rq->cmd;
 }
 
-static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int idedisk_issue_flush(struct request_queue *q, struct gendisk *disk,
 			       sector_t *error_sector)
 {
 	ide_drive_t *drive = q->queuedata;
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 484c50e7144..aa9f5f0b1e6 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -1327,7 +1327,7 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
 /*
  * Passes the stuff to ide_do_request
  */
-void do_ide_request(request_queue_t *q)
+void do_ide_request(struct request_queue *q)
 {
 	ide_drive_t *drive = q->queuedata;
 
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 5a4c5ea12f8..3a2a9a338fd 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -945,7 +945,7 @@ static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
  */
 static int ide_init_queue(ide_drive_t *drive)
 {
-	request_queue_t *q;
+	struct request_queue *q;
 	ide_hwif_t *hwif = HWIF(drive);
 	int max_sectors = 256;
 	int max_sg_entries = PRD_ENTRIES;
diff --git a/drivers/ide/legacy/hd.c b/drivers/ide/legacy/hd.c
index 8f2db8dd35f..8e05d88e81b 100644
--- a/drivers/ide/legacy/hd.c
+++ b/drivers/ide/legacy/hd.c
@@ -652,7 +652,7 @@ repeat:
 	}
 }
 
-static void do_hd_request (request_queue_t * q)
+static void do_hd_request (struct request_queue * q)
 {
 	disable_irq(HD_IRQ);
 	hd_request();
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 2fc199b0016..2bcde5798b5 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -526,7 +526,7 @@ static int __table_get_device(struct dm_table *t, struct dm_target *ti,
 
 void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
 {
-	request_queue_t *q = bdev_get_queue(bdev);
+	struct request_queue *q = bdev_get_queue(bdev);
 	struct io_restrictions *rs = &ti->limits;
 
 	/*
@@ -979,7 +979,7 @@ int dm_table_any_congested(struct dm_table *t, int bdi_bits)
 	devices = dm_table_get_devices(t);
 	for (d = devices->next; d != devices; d = d->next) {
 		struct dm_dev *dd = list_entry(d, struct dm_dev, list);
-		request_queue_t *q = bdev_get_queue(dd->bdev);
+		struct request_queue *q = bdev_get_queue(dd->bdev);
 		r |= bdi_congested(&q->backing_dev_info, bdi_bits);
 	}
 
@@ -992,7 +992,7 @@ void dm_table_unplug_all(struct dm_table *t)
 
 	for (d = devices->next; d != devices; d = d->next) {
 		struct dm_dev *dd = list_entry(d, struct dm_dev, list);
-		request_queue_t *q = bdev_get_queue(dd->bdev);
+		struct request_queue *q = bdev_get_queue(dd->bdev);
 
 		if (q->unplug_fn)
 			q->unplug_fn(q);
@@ -1011,7 +1011,7 @@ int dm_table_flush_all(struct dm_table *t)
 
 	for (d = devices->next; d != devices; d = d->next) {
 		struct dm_dev *dd = list_entry(d, struct dm_dev, list);
-		request_queue_t *q = bdev_get_queue(dd->bdev);
+		struct request_queue *q = bdev_get_queue(dd->bdev);
 		int err;
 
 		if (!q->issue_flush_fn)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 846614e676c..141ff9fa296 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -80,7 +80,7 @@ struct mapped_device {
 
 	unsigned long flags;
 
-	request_queue_t *queue;
+	struct request_queue *queue;
 	struct gendisk *disk;
 	char name[16];
 
@@ -792,7 +792,7 @@ static void __split_bio(struct mapped_device *md, struct bio *bio)
  * The request function that just remaps the bio built up by
  * dm_merge_bvec.
  */
-static int dm_request(request_queue_t *q, struct bio *bio)
+static int dm_request(struct request_queue *q, struct bio *bio)
 {
 	int r;
 	int rw = bio_data_dir(bio);
@@ -844,7 +844,7 @@ static int dm_request(request_queue_t *q, struct bio *bio)
 	return 0;
 }
 
-static int dm_flush_all(request_queue_t *q, struct gendisk *disk,
+static int dm_flush_all(struct request_queue *q, struct gendisk *disk,
 			sector_t *error_sector)
 {
 	struct mapped_device *md = q->queuedata;
@@ -859,7 +859,7 @@ static int dm_flush_all(request_queue_t *q, struct gendisk *disk,
 	return ret;
 }
 
-static void dm_unplug_all(request_queue_t *q)
+static void dm_unplug_all(struct request_queue *q)
 {
 	struct mapped_device *md = q->queuedata;
 	struct dm_table *map = dm_get_table(md);
@@ -1110,7 +1110,7 @@ static void __set_size(struct mapped_device *md, sector_t size)
 
 static int __bind(struct mapped_device *md, struct dm_table *t)
 {
-	request_queue_t *q = md->queue;
+	struct request_queue *q = md->queue;
 	sector_t size;
 
 	size = dm_table_get_size(t);
diff --git a/drivers/md/faulty.c b/drivers/md/faulty.c
index 4ebd0f2a75e..cb059cf14c2 100644
--- a/drivers/md/faulty.c
+++ b/drivers/md/faulty.c
@@ -167,7 +167,7 @@ static void add_sector(conf_t *conf, sector_t start, int mode)
 		conf->nfaults = n+1;
 }
 
-static int make_request(request_queue_t *q, struct bio *bio)
+static int make_request(struct request_queue *q, struct bio *bio)
 {
 	mddev_t *mddev = q->queuedata;
 	conf_t *conf = (conf_t*)mddev->private;
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 19274108319..17f795c3e0a 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -55,7 +55,7 @@ static inline dev_info_t *which_dev(mddev_t *mddev, sector_t sector)
  *
  *	Return amount of bytes we can take at this offset
  */
-static int linear_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *biovec)
+static int linear_mergeable_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *biovec)
 {
 	mddev_t *mddev = q->queuedata;
 	dev_info_t *dev0;
@@ -79,20 +79,20 @@ static int linear_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio
 	return maxsectors << 9;
 }
 
-static void linear_unplug(request_queue_t *q)
+static void linear_unplug(struct request_queue *q)
 {
 	mddev_t *mddev = q->queuedata;
 	linear_conf_t *conf = mddev_to_conf(mddev);
 	int i;
 
 	for (i=0; i < mddev->raid_disks; i++) {
-		request_queue_t *r_queue = bdev_get_queue(conf->disks[i].rdev->bdev);
+		struct request_queue *r_queue = bdev_get_queue(conf->disks[i].rdev->bdev);
 		if (r_queue->unplug_fn)
 			r_queue->unplug_fn(r_queue);
 	}
 }
 
-static int linear_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int linear_issue_flush(struct request_queue *q, struct gendisk *disk,
 			      sector_t *error_sector)
 {
 	mddev_t *mddev = q->queuedata;
@@ -101,7 +101,7 @@ static int linear_issue_flush(request_queue_t *q, struct gendisk *disk,
 
 	for (i=0; i < mddev->raid_disks && ret == 0; i++) {
 		struct block_device *bdev = conf->disks[i].rdev->bdev;
-		request_queue_t *r_queue = bdev_get_queue(bdev);
+		struct request_queue *r_queue = bdev_get_queue(bdev);
 
 		if (!r_queue->issue_flush_fn)
 			ret = -EOPNOTSUPP;
@@ -118,7 +118,7 @@ static int linear_congested(void *data, int bits)
 	int i, ret = 0;
 
 	for (i = 0; i < mddev->raid_disks && !ret ; i++) {
-		request_queue_t *q = bdev_get_queue(conf->disks[i].rdev->bdev);
+		struct request_queue *q = bdev_get_queue(conf->disks[i].rdev->bdev);
 		ret |= bdi_congested(&q->backing_dev_info, bits);
 	}
 	return ret;
@@ -330,7 +330,7 @@ static int linear_stop (mddev_t *mddev)
 	return 0;
 }
 
-static int linear_make_request (request_queue_t *q, struct bio *bio)
+static int linear_make_request (struct request_queue *q, struct bio *bio)
 {
 	const int rw = bio_data_dir(bio);
 	mddev_t *mddev = q->queuedata;
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 65ddc887dfd..f883b7e37f3 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -211,7 +211,7 @@ static DEFINE_SPINLOCK(all_mddevs_lock);
 		)
 
 
-static int md_fail_request (request_queue_t *q, struct bio *bio)
+static int md_fail_request (struct request_queue *q, struct bio *bio)
 {
 	bio_io_error(bio, bio->bi_size);
 	return 0;
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 14da37fee37..1e2af43a73b 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -125,7 +125,7 @@ static void unplug_slaves(mddev_t *mddev)
 		mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)
 		    && atomic_read(&rdev->nr_pending)) {
-			request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
+			struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
 
 			atomic_inc(&rdev->nr_pending);
 			rcu_read_unlock();
@@ -140,13 +140,13 @@ static void unplug_slaves(mddev_t *mddev)
 	rcu_read_unlock();
 }
 
-static void multipath_unplug(request_queue_t *q)
+static void multipath_unplug(struct request_queue *q)
 {
 	unplug_slaves(q->queuedata);
 }
 
 
-static int multipath_make_request (request_queue_t *q, struct bio * bio)
+static int multipath_make_request (struct request_queue *q, struct bio * bio)
 {
 	mddev_t *mddev = q->queuedata;
 	multipath_conf_t *conf = mddev_to_conf(mddev);
@@ -199,7 +199,7 @@ static void multipath_status (struct seq_file *seq, mddev_t *mddev)
 	seq_printf (seq, "]");
 }
 
-static int multipath_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int multipath_issue_flush(struct request_queue *q, struct gendisk *disk,
 				 sector_t *error_sector)
 {
 	mddev_t *mddev = q->queuedata;
@@ -211,7 +211,7 @@ static int multipath_issue_flush(request_queue_t *q, struct gendisk *disk,
 		mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)) {
 			struct block_device *bdev = rdev->bdev;
-			request_queue_t *r_queue = bdev_get_queue(bdev);
+			struct request_queue *r_queue = bdev_get_queue(bdev);
 
 			if (!r_queue->issue_flush_fn)
 				ret = -EOPNOTSUPP;
@@ -238,7 +238,7 @@ static int multipath_congested(void *data, int bits)
 	for (i = 0; i < mddev->raid_disks ; i++) {
 		mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)) {
-			request_queue_t *q = bdev_get_queue(rdev->bdev);
+			struct request_queue *q = bdev_get_queue(rdev->bdev);
 
 			ret |= bdi_congested(&q->backing_dev_info, bits);
 			/* Just like multipath_map, we just check the
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 2c404f73a37..b8216bc6db4 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -25,7 +25,7 @@
 #define MD_DRIVER
 #define MD_PERSONALITY
 
-static void raid0_unplug(request_queue_t *q)
+static void raid0_unplug(struct request_queue *q)
 {
 	mddev_t *mddev = q->queuedata;
 	raid0_conf_t *conf = mddev_to_conf(mddev);
@@ -33,14 +33,14 @@ static void raid0_unplug(request_queue_t *q)
 	int i;
 
 	for (i=0; i<mddev->raid_disks; i++) {
-		request_queue_t *r_queue = bdev_get_queue(devlist[i]->bdev);
+		struct request_queue *r_queue = bdev_get_queue(devlist[i]->bdev);
 
 		if (r_queue->unplug_fn)
 			r_queue->unplug_fn(r_queue);
 	}
 }
 
-static int raid0_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid0_issue_flush(struct request_queue *q, struct gendisk *disk,
 			     sector_t *error_sector)
 {
 	mddev_t *mddev = q->queuedata;
@@ -50,7 +50,7 @@ static int raid0_issue_flush(request_queue_t *q, struct gendisk *disk,
 
 	for (i=0; i<mddev->raid_disks && ret == 0; i++) {
 		struct block_device *bdev = devlist[i]->bdev;
-		request_queue_t *r_queue = bdev_get_queue(bdev);
+		struct request_queue *r_queue = bdev_get_queue(bdev);
 
 		if (!r_queue->issue_flush_fn)
 			ret = -EOPNOTSUPP;
@@ -68,7 +68,7 @@ static int raid0_congested(void *data, int bits)
 	int i, ret = 0;
 
 	for (i = 0; i < mddev->raid_disks && !ret ; i++) {
-		request_queue_t *q = bdev_get_queue(devlist[i]->bdev);
+		struct request_queue *q = bdev_get_queue(devlist[i]->bdev);
 
 		ret |= bdi_congested(&q->backing_dev_info, bits);
 	}
@@ -268,7 +268,7 @@ static int create_strip_zones (mddev_t *mddev)
  *
  *	Return amount of bytes we can accept at this offset
  */
-static int raid0_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *biovec)
+static int raid0_mergeable_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *biovec)
 {
 	mddev_t *mddev = q->queuedata;
 	sector_t sector = bio->bi_sector + get_start_sect(bio->bi_bdev);
@@ -408,7 +408,7 @@ static int raid0_stop (mddev_t *mddev)
 	return 0;
 }
 
-static int raid0_make_request (request_queue_t *q, struct bio *bio)
+static int raid0_make_request (struct request_queue *q, struct bio *bio)
 {
 	mddev_t *mddev = q->queuedata;
 	unsigned int sect_in_chunk, chunksize_bits,  chunk_size, chunk_sects;
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 00c78b77b13..650991bddd8 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -552,7 +552,7 @@ static void unplug_slaves(mddev_t *mddev)
 	for (i=0; i<mddev->raid_disks; i++) {
 		mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags) && atomic_read(&rdev->nr_pending)) {
-			request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
+			struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
 
 			atomic_inc(&rdev->nr_pending);
 			rcu_read_unlock();
@@ -567,7 +567,7 @@ static void unplug_slaves(mddev_t *mddev)
 	rcu_read_unlock();
 }
 
-static void raid1_unplug(request_queue_t *q)
+static void raid1_unplug(struct request_queue *q)
 {
 	mddev_t *mddev = q->queuedata;
 
@@ -575,7 +575,7 @@ static void raid1_unplug(request_queue_t *q)
 	md_wakeup_thread(mddev->thread);
 }
 
-static int raid1_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid1_issue_flush(struct request_queue *q, struct gendisk *disk,
 			     sector_t *error_sector)
 {
 	mddev_t *mddev = q->queuedata;
@@ -587,7 +587,7 @@ static int raid1_issue_flush(request_queue_t *q, struct gendisk *disk,
 		mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)) {
 			struct block_device *bdev = rdev->bdev;
-			request_queue_t *r_queue = bdev_get_queue(bdev);
+			struct request_queue *r_queue = bdev_get_queue(bdev);
 
 			if (!r_queue->issue_flush_fn)
 				ret = -EOPNOTSUPP;
@@ -615,7 +615,7 @@ static int raid1_congested(void *data, int bits)
 	for (i = 0; i < mddev->raid_disks; i++) {
 		mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)) {
-			request_queue_t *q = bdev_get_queue(rdev->bdev);
+			struct request_queue *q = bdev_get_queue(rdev->bdev);
 
 			/* Note the '|| 1' - when read_balance prefers
 			 * non-congested targets, it can be removed
@@ -765,7 +765,7 @@ do_sync_io:
 	return NULL;
 }
 
-static int make_request(request_queue_t *q, struct bio * bio)
+static int make_request(struct request_queue *q, struct bio * bio)
 {
 	mddev_t *mddev = q->queuedata;
 	conf_t *conf = mddev_to_conf(mddev);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index a95ada1cfac..f730a144baf 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -453,7 +453,7 @@ static sector_t raid10_find_virt(conf_t *conf, sector_t sector, int dev)
  *      If near_copies == raid_disk, there are no striping issues,
  *      but in that case, the function isn't called at all.
  */
-static int raid10_mergeable_bvec(request_queue_t *q, struct bio *bio,
+static int raid10_mergeable_bvec(struct request_queue *q, struct bio *bio,
 				struct bio_vec *bio_vec)
 {
 	mddev_t *mddev = q->queuedata;
@@ -595,7 +595,7 @@ static void unplug_slaves(mddev_t *mddev)
 	for (i=0; i<mddev->raid_disks; i++) {
 		mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags) && atomic_read(&rdev->nr_pending)) {
-			request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
+			struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
 
 			atomic_inc(&rdev->nr_pending);
 			rcu_read_unlock();
@@ -610,7 +610,7 @@ static void unplug_slaves(mddev_t *mddev)
 	rcu_read_unlock();
 }
 
-static void raid10_unplug(request_queue_t *q)
+static void raid10_unplug(struct request_queue *q)
 {
 	mddev_t *mddev = q->queuedata;
 
@@ -618,7 +618,7 @@ static void raid10_unplug(request_queue_t *q)
 	md_wakeup_thread(mddev->thread);
 }
 
-static int raid10_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid10_issue_flush(struct request_queue *q, struct gendisk *disk,
 			     sector_t *error_sector)
 {
 	mddev_t *mddev = q->queuedata;
@@ -630,7 +630,7 @@ static int raid10_issue_flush(request_queue_t *q, struct gendisk *disk,
 		mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)) {
 			struct block_device *bdev = rdev->bdev;
-			request_queue_t *r_queue = bdev_get_queue(bdev);
+			struct request_queue *r_queue = bdev_get_queue(bdev);
 
 			if (!r_queue->issue_flush_fn)
 				ret = -EOPNOTSUPP;
@@ -658,7 +658,7 @@ static int raid10_congested(void *data, int bits)
 	for (i = 0; i < mddev->raid_disks && ret == 0; i++) {
 		mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)) {
-			request_queue_t *q = bdev_get_queue(rdev->bdev);
+			struct request_queue *q = bdev_get_queue(rdev->bdev);
 
 			ret |= bdi_congested(&q->backing_dev_info, bits);
 		}
@@ -772,7 +772,7 @@ static void unfreeze_array(conf_t *conf)
 	spin_unlock_irq(&conf->resync_lock);
 }
 
-static int make_request(request_queue_t *q, struct bio * bio)
+static int make_request(struct request_queue *q, struct bio * bio)
 {
 	mddev_t *mddev = q->queuedata;
 	conf_t *conf = mddev_to_conf(mddev);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index d90ee145eff..2aff4be35dc 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -289,7 +289,7 @@ static struct stripe_head *__find_stripe(raid5_conf_t *conf, sector_t sector, in
 }
 
 static void unplug_slaves(mddev_t *mddev);
-static void raid5_unplug_device(request_queue_t *q);
+static void raid5_unplug_device(struct request_queue *q);
 
 static struct stripe_head *get_active_stripe(raid5_conf_t *conf, sector_t sector, int disks,
 					     int pd_idx, int noblock)
@@ -3182,7 +3182,7 @@ static void unplug_slaves(mddev_t *mddev)
 	for (i=0; i<mddev->raid_disks; i++) {
 		mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags) && atomic_read(&rdev->nr_pending)) {
-			request_queue_t *r_queue = bdev_get_queue(rdev->bdev);
+			struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
 
 			atomic_inc(&rdev->nr_pending);
 			rcu_read_unlock();
@@ -3197,7 +3197,7 @@ static void unplug_slaves(mddev_t *mddev)
 	rcu_read_unlock();
 }
 
-static void raid5_unplug_device(request_queue_t *q)
+static void raid5_unplug_device(struct request_queue *q)
 {
 	mddev_t *mddev = q->queuedata;
 	raid5_conf_t *conf = mddev_to_conf(mddev);
@@ -3216,7 +3216,7 @@ static void raid5_unplug_device(request_queue_t *q)
 	unplug_slaves(mddev);
 }
 
-static int raid5_issue_flush(request_queue_t *q, struct gendisk *disk,
+static int raid5_issue_flush(struct request_queue *q, struct gendisk *disk,
 			     sector_t *error_sector)
 {
 	mddev_t *mddev = q->queuedata;
@@ -3228,7 +3228,7 @@ static int raid5_issue_flush(request_queue_t *q, struct gendisk *disk,
 		mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev);
 		if (rdev && !test_bit(Faulty, &rdev->flags)) {
 			struct block_device *bdev = rdev->bdev;
-			request_queue_t *r_queue = bdev_get_queue(bdev);
+			struct request_queue *r_queue = bdev_get_queue(bdev);
 
 			if (!r_queue->issue_flush_fn)
 				ret = -EOPNOTSUPP;
@@ -3267,7 +3267,7 @@ static int raid5_congested(void *data, int bits)
 /* We want read requests to align with chunks where possible,
  * but write requests don't need to.
  */
-static int raid5_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio_vec *biovec)
+static int raid5_mergeable_bvec(struct request_queue *q, struct bio *bio, struct bio_vec *biovec)
 {
 	mddev_t *mddev = q->queuedata;
 	sector_t sector = bio->bi_sector + get_start_sect(bio->bi_bdev);
@@ -3377,7 +3377,7 @@ static int raid5_align_endio(struct bio *bi, unsigned int bytes, int error)
 
 static int bio_fits_rdev(struct bio *bi)
 {
-	request_queue_t *q = bdev_get_queue(bi->bi_bdev);
+	struct request_queue *q = bdev_get_queue(bi->bi_bdev);
 
 	if ((bi->bi_size>>9) > q->max_sectors)
 		return 0;
@@ -3396,7 +3396,7 @@ static int bio_fits_rdev(struct bio *bi)
 }
 
 
-static int chunk_aligned_read(request_queue_t *q, struct bio * raid_bio)
+static int chunk_aligned_read(struct request_queue *q, struct bio * raid_bio)
 {
 	mddev_t *mddev = q->queuedata;
 	raid5_conf_t *conf = mddev_to_conf(mddev);
@@ -3466,7 +3466,7 @@ static int chunk_aligned_read(request_queue_t *q, struct bio * raid_bio)
 }
 
 
-static int make_request(request_queue_t *q, struct bio * bi)
+static int make_request(struct request_queue *q, struct bio * bi)
 {
 	mddev_t *mddev = q->queuedata;
 	raid5_conf_t *conf = mddev_to_conf(mddev);
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index 988c8ce47f5..5e1c99f83ab 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -159,7 +159,7 @@ static int i2o_block_device_flush(struct i2o_device *dev)
  *	Returns 0 on success or negative error code on failure.
  */
 
-static int i2o_block_issue_flush(request_queue_t * queue, struct gendisk *disk,
+static int i2o_block_issue_flush(struct request_queue * queue, struct gendisk *disk,
 				 sector_t * error_sector)
 {
 	struct i2o_block_device *i2o_blk_dev = queue->queuedata;
@@ -445,7 +445,7 @@ static void i2o_block_end_request(struct request *req, int uptodate,
 {
 	struct i2o_block_request *ireq = req->special;
 	struct i2o_block_device *dev = ireq->i2o_blk_dev;
-	request_queue_t *q = req->q;
+	struct request_queue *q = req->q;
 	unsigned long flags;
 
 	if (end_that_request_chunk(req, uptodate, nr_bytes)) {
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index b53dac8d1b6..e02eac87636 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -83,7 +83,7 @@ static int mmc_queue_thread(void *d)
  * on any queue on this host, and attempt to issue it.  This may
  * not be the queue we were asked to process.
  */
-static void mmc_request(request_queue_t *q)
+static void mmc_request(struct request_queue *q)
 {
 	struct mmc_queue *mq = q->queuedata;
 	struct request *req;
@@ -211,7 +211,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 
 void mmc_cleanup_queue(struct mmc_queue *mq)
 {
-	request_queue_t *q = mq->queue;
+	struct request_queue *q = mq->queue;
 	unsigned long flags;
 
 	/* Mark that we should start throwing out stragglers */
@@ -252,7 +252,7 @@ EXPORT_SYMBOL(mmc_cleanup_queue);
  */
 void mmc_queue_suspend(struct mmc_queue *mq)
 {
-	request_queue_t *q = mq->queue;
+	struct request_queue *q = mq->queue;
 	unsigned long flags;
 
 	if (!(mq->flags & MMC_QUEUE_SUSPENDED)) {
@@ -272,7 +272,7 @@ void mmc_queue_suspend(struct mmc_queue *mq)
  */
 void mmc_queue_resume(struct mmc_queue *mq)
 {
-	request_queue_t *q = mq->queue;
+	struct request_queue *q = mq->queue;
 	unsigned long flags;
 
 	if (mq->flags & MMC_QUEUE_SUSPENDED) {
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index bfeca57098f..e6bfce690ca 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1187,7 +1187,7 @@ dasd_end_request_cb(struct dasd_ccw_req * cqr, void *data)
 static void
 __dasd_process_blk_queue(struct dasd_device * device)
 {
-	request_queue_t *queue;
+	struct request_queue *queue;
 	struct request *req;
 	struct dasd_ccw_req *cqr;
 	int nr_queued;
@@ -1740,7 +1740,7 @@ dasd_cancel_req(struct dasd_ccw_req *cqr)
  * Dasd request queue function. Called from ll_rw_blk.c
  */
 static void
-do_dasd_request(request_queue_t * queue)
+do_dasd_request(struct request_queue * queue)
 {
 	struct dasd_device *device;
 
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 241294cba41..aeda5268244 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -293,7 +293,7 @@ struct dasd_uid {
 struct dasd_device {
 	/* Block device stuff. */
 	struct gendisk *gdp;
-	request_queue_t *request_queue;
+	struct request_queue *request_queue;
 	spinlock_t request_queue_lock;
 	struct block_device *bdev;
         unsigned int devindex;
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 35765f6a86e..4d8798bacf9 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -621,7 +621,7 @@ out:
 }
 
 static int
-dcssblk_make_request(request_queue_t *q, struct bio *bio)
+dcssblk_make_request(struct request_queue *q, struct bio *bio)
 {
 	struct dcssblk_dev_info *dev_info;
 	struct bio_vec *bvec;
diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c
index a04d9120cef..354a060e5be 100644
--- a/drivers/s390/block/xpram.c
+++ b/drivers/s390/block/xpram.c
@@ -191,7 +191,7 @@ static unsigned long __init xpram_highest_page_index(void)
 /*
  * Block device make request function.
  */
-static int xpram_make_request(request_queue_t *q, struct bio *bio)
+static int xpram_make_request(struct request_queue *q, struct bio *bio)
 {
 	xpram_device_t *xdev = bio->bi_bdev->bd_disk->private_data;
 	struct bio_vec *bvec;
diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h
index 3b52f5c1dbe..dddf8d62c15 100644
--- a/drivers/s390/char/tape.h
+++ b/drivers/s390/char/tape.h
@@ -188,7 +188,7 @@ struct tape_blk_data
 {
 	struct tape_device *	device;
 	/* Block device request queue. */
-	request_queue_t *	request_queue;
+	struct request_queue *	request_queue;
 	spinlock_t		request_queue_lock;
 
 	/* Task to move entries from block request to CCS request queue. */
diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c
index dd0ecaed592..eeb92e2ed0c 100644
--- a/drivers/s390/char/tape_block.c
+++ b/drivers/s390/char/tape_block.c
@@ -147,7 +147,7 @@ static void
 tapeblock_requeue(struct work_struct *work) {
 	struct tape_blk_data *	blkdat;
 	struct tape_device *	device;
-	request_queue_t *	queue;
+	struct request_queue *	queue;
 	int			nr_queued;
 	struct request *	req;
 	struct list_head *	l;
@@ -194,7 +194,7 @@ tapeblock_requeue(struct work_struct *work) {
  * Tape request queue function. Called from ll_rw_blk.c
  */
 static void
-tapeblock_request_fn(request_queue_t *queue)
+tapeblock_request_fn(struct request_queue *queue)
 {
 	struct tape_device *device;
 
diff --git a/drivers/sbus/char/jsflash.c b/drivers/sbus/char/jsflash.c
index 5157a2abc58..4b7079fdc10 100644
--- a/drivers/sbus/char/jsflash.c
+++ b/drivers/sbus/char/jsflash.c
@@ -185,7 +185,7 @@ static void jsfd_read(char *buf, unsigned long p, size_t togo) {
 	}
 }
 
-static void jsfd_do_request(request_queue_t *q)
+static void jsfd_do_request(struct request_queue *q)
 {
 	struct request *req;
 
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index da63c544919..21c075d44db 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -654,7 +654,7 @@ void scsi_run_host_queues(struct Scsi_Host *shost)
 static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int uptodate,
 					  int bytes, int requeue)
 {
-	request_queue_t *q = cmd->device->request_queue;
+	struct request_queue *q = cmd->device->request_queue;
 	struct request *req = cmd->request;
 	unsigned long flags;
 
@@ -818,7 +818,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
 {
 	int result = cmd->result;
 	int this_count = cmd->request_bufflen;
-	request_queue_t *q = cmd->device->request_queue;
+	struct request_queue *q = cmd->device->request_queue;
 	struct request *req = cmd->request;
 	int clear_errors = 1;
 	struct scsi_sense_hdr sshdr;
@@ -1038,7 +1038,7 @@ static int scsi_init_io(struct scsi_cmnd *cmd)
 	return BLKPREP_KILL;
 }
 
-static int scsi_issue_flush_fn(request_queue_t *q, struct gendisk *disk,
+static int scsi_issue_flush_fn(struct request_queue *q, struct gendisk *disk,
 			       sector_t *error_sector)
 {
 	struct scsi_device *sdev = q->queuedata;
@@ -1340,7 +1340,7 @@ static inline int scsi_host_queue_ready(struct request_queue *q,
 /*
  * Kill a request for a dead device
  */
-static void scsi_kill_request(struct request *req, request_queue_t *q)
+static void scsi_kill_request(struct request *req, struct request_queue *q)
 {
 	struct scsi_cmnd *cmd = req->special;
 	struct scsi_device *sdev = cmd->device;
@@ -2119,7 +2119,7 @@ EXPORT_SYMBOL(scsi_target_resume);
 int
 scsi_internal_device_block(struct scsi_device *sdev)
 {
-	request_queue_t *q = sdev->request_queue;
+	struct request_queue *q = sdev->request_queue;
 	unsigned long flags;
 	int err = 0;
 
@@ -2159,7 +2159,7 @@ EXPORT_SYMBOL_GPL(scsi_internal_device_block);
 int
 scsi_internal_device_unblock(struct scsi_device *sdev)
 {
-	request_queue_t *q = sdev->request_queue; 
+	struct request_queue *q = sdev->request_queue; 
 	int err;
 	unsigned long flags;
 	
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 424d557284a..e21c7142a3e 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -814,7 +814,7 @@ static int sd_issue_flush(struct device *dev, sector_t *error_sector)
 	return ret;
 }
 
-static void sd_prepare_flush(request_queue_t *q, struct request *rq)
+static void sd_prepare_flush(struct request_queue *q, struct request *rq)
 {
 	memset(rq->cmd, 0, sizeof(rq->cmd));
 	rq->cmd_type = REQ_TYPE_BLOCK_PC;
@@ -1285,7 +1285,7 @@ got_data:
 		 */
 		int hard_sector = sector_size;
 		sector_t sz = (sdkp->capacity/2) * (hard_sector/256);
-		request_queue_t *queue = sdp->request_queue;
+		struct request_queue *queue = sdp->request_queue;
 		sector_t mb = sz;
 
 		blk_queue_hardsect_size(queue, hard_sector);
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index e7b6a7fde1c..902eb11ffe8 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -624,7 +624,7 @@ static void get_sectorsize(struct scsi_cd *cd)
 	unsigned char *buffer;
 	int the_result, retries = 3;
 	int sector_size;
-	request_queue_t *queue;
+	struct request_queue *queue;
 
 	buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
 	if (!buffer)
diff --git a/fs/bio.c b/fs/bio.c
index 0d2c2d38b7b..29a44c1b64c 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -230,7 +230,7 @@ void bio_put(struct bio *bio)
 	}
 }
 
-inline int bio_phys_segments(request_queue_t *q, struct bio *bio)
+inline int bio_phys_segments(struct request_queue *q, struct bio *bio)
 {
 	if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
 		blk_recount_segments(q, bio);
@@ -238,7 +238,7 @@ inline int bio_phys_segments(request_queue_t *q, struct bio *bio)
 	return bio->bi_phys_segments;
 }
 
-inline int bio_hw_segments(request_queue_t *q, struct bio *bio)
+inline int bio_hw_segments(struct request_queue *q, struct bio *bio)
 {
 	if (unlikely(!bio_flagged(bio, BIO_SEG_VALID)))
 		blk_recount_segments(q, bio);
@@ -257,7 +257,7 @@ inline int bio_hw_segments(request_queue_t *q, struct bio *bio)
  */
 void __bio_clone(struct bio *bio, struct bio *bio_src)
 {
-	request_queue_t *q = bdev_get_queue(bio_src->bi_bdev);
+	struct request_queue *q = bdev_get_queue(bio_src->bi_bdev);
 
 	memcpy(bio->bi_io_vec, bio_src->bi_io_vec,
 		bio_src->bi_max_vecs * sizeof(struct bio_vec));
@@ -303,7 +303,7 @@ struct bio *bio_clone(struct bio *bio, gfp_t gfp_mask)
  */
 int bio_get_nr_vecs(struct block_device *bdev)
 {
-	request_queue_t *q = bdev_get_queue(bdev);
+	struct request_queue *q = bdev_get_queue(bdev);
 	int nr_pages;
 
 	nr_pages = ((q->max_sectors << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
@@ -315,7 +315,7 @@ int bio_get_nr_vecs(struct block_device *bdev)
 	return nr_pages;
 }
 
-static int __bio_add_page(request_queue_t *q, struct bio *bio, struct page
+static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
 			  *page, unsigned int len, unsigned int offset,
 			  unsigned short max_sectors)
 {
@@ -425,7 +425,7 @@ static int __bio_add_page(request_queue_t *q, struct bio *bio, struct page
  *      smaller than PAGE_SIZE, so it is always possible to add a single
  *      page to an empty bio. This should only be used by REQ_PC bios.
  */
-int bio_add_pc_page(request_queue_t *q, struct bio *bio, struct page *page,
+int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page *page,
 		    unsigned int len, unsigned int offset)
 {
 	return __bio_add_page(q, bio, page, len, offset, q->max_hw_sectors);
@@ -523,7 +523,7 @@ int bio_uncopy_user(struct bio *bio)
  *	to/from kernel pages as necessary. Must be paired with
  *	call bio_uncopy_user() on io completion.
  */
-struct bio *bio_copy_user(request_queue_t *q, unsigned long uaddr,
+struct bio *bio_copy_user(struct request_queue *q, unsigned long uaddr,
 			  unsigned int len, int write_to_vm)
 {
 	unsigned long end = (uaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
@@ -600,7 +600,7 @@ out_bmd:
 	return ERR_PTR(ret);
 }
 
-static struct bio *__bio_map_user_iov(request_queue_t *q,
+static struct bio *__bio_map_user_iov(struct request_queue *q,
 				      struct block_device *bdev,
 				      struct sg_iovec *iov, int iov_count,
 				      int write_to_vm)
@@ -712,7 +712,7 @@ static struct bio *__bio_map_user_iov(request_queue_t *q,
 
 /**
  *	bio_map_user	-	map user address into bio
- *	@q: the request_queue_t for the bio
+ *	@q: the struct request_queue for the bio
  *	@bdev: destination block device
  *	@uaddr: start of user address
  *	@len: length in bytes
@@ -721,7 +721,7 @@ static struct bio *__bio_map_user_iov(request_queue_t *q,
  *	Map the user space address into a bio suitable for io to a block
  *	device. Returns an error pointer in case of error.
  */
-struct bio *bio_map_user(request_queue_t *q, struct block_device *bdev,
+struct bio *bio_map_user(struct request_queue *q, struct block_device *bdev,
 			 unsigned long uaddr, unsigned int len, int write_to_vm)
 {
 	struct sg_iovec iov;
@@ -734,7 +734,7 @@ struct bio *bio_map_user(request_queue_t *q, struct block_device *bdev,
 
 /**
  *	bio_map_user_iov - map user sg_iovec table into bio
- *	@q: the request_queue_t for the bio
+ *	@q: the struct request_queue for the bio
  *	@bdev: destination block device
  *	@iov:	the iovec.
  *	@iov_count: number of elements in the iovec
@@ -743,7 +743,7 @@ struct bio *bio_map_user(request_queue_t *q, struct block_device *bdev,
  *	Map the user space address into a bio suitable for io to a block
  *	device. Returns an error pointer in case of error.
  */
-struct bio *bio_map_user_iov(request_queue_t *q, struct block_device *bdev,
+struct bio *bio_map_user_iov(struct request_queue *q, struct block_device *bdev,
 			     struct sg_iovec *iov, int iov_count,
 			     int write_to_vm)
 {
@@ -808,7 +808,7 @@ static int bio_map_kern_endio(struct bio *bio, unsigned int bytes_done, int err)
 }
 
 
-static struct bio *__bio_map_kern(request_queue_t *q, void *data,
+static struct bio *__bio_map_kern(struct request_queue *q, void *data,
 				  unsigned int len, gfp_t gfp_mask)
 {
 	unsigned long kaddr = (unsigned long)data;
@@ -847,7 +847,7 @@ static struct bio *__bio_map_kern(request_queue_t *q, void *data,
 
 /**
  *	bio_map_kern	-	map kernel address into bio
- *	@q: the request_queue_t for the bio
+ *	@q: the struct request_queue for the bio
  *	@data: pointer to buffer to map
  *	@len: length in bytes
  *	@gfp_mask: allocation flags for bio allocation
@@ -855,7 +855,7 @@ static struct bio *__bio_map_kern(request_queue_t *q, void *data,
  *	Map the kernel address into a bio suitable for io to a block
  *	device. Returns an error pointer in case of error.
  */
-struct bio *bio_map_kern(request_queue_t *q, void *data, unsigned int len,
+struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len,
 			 gfp_t gfp_mask)
 {
 	struct bio *bio;
diff --git a/include/asm-arm/arch-omap/mailbox.h b/include/asm-arm/arch-omap/mailbox.h
index 4bf0909461f..7cbed9332e1 100644
--- a/include/asm-arm/arch-omap/mailbox.h
+++ b/include/asm-arm/arch-omap/mailbox.h
@@ -37,7 +37,7 @@ struct omap_mbox_ops {
 
 struct omap_mbox_queue {
 	spinlock_t		lock;
-	request_queue_t		*queue;
+	struct request_queue	*queue;
 	struct work_struct	work;
 	int	(*callback)(void *);
 	struct omap_mbox	*mbox;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 695e34964cb..4be37de0205 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -37,7 +37,6 @@
 struct scsi_ioctl_command;
 
 struct request_queue;
-typedef struct request_queue request_queue_t;
 struct elevator_queue;
 typedef struct elevator_queue elevator_t;
 struct request_pm_state;
@@ -233,7 +232,7 @@ struct request {
 	struct list_head queuelist;
 	struct list_head donelist;
 
-	request_queue_t *q;
+	struct request_queue *q;
 
 	unsigned int cmd_flags;
 	enum rq_cmd_type_bits cmd_type;
@@ -337,15 +336,15 @@ struct request_pm_state
 
 #include <linux/elevator.h>
 
-typedef void (request_fn_proc) (request_queue_t *q);
-typedef int (make_request_fn) (request_queue_t *q, struct bio *bio);
-typedef int (prep_rq_fn) (request_queue_t *, struct request *);
-typedef void (unplug_fn) (request_queue_t *);
+typedef void (request_fn_proc) (struct request_queue *q);
+typedef int (make_request_fn) (struct request_queue *q, struct bio *bio);
+typedef int (prep_rq_fn) (struct request_queue *, struct request *);
+typedef void (unplug_fn) (struct request_queue *);
 
 struct bio_vec;
-typedef int (merge_bvec_fn) (request_queue_t *, struct bio *, struct bio_vec *);
-typedef int (issue_flush_fn) (request_queue_t *, struct gendisk *, sector_t *);
-typedef void (prepare_flush_fn) (request_queue_t *, struct request *);
+typedef int (merge_bvec_fn) (struct request_queue *, struct bio *, struct bio_vec *);
+typedef int (issue_flush_fn) (struct request_queue *, struct gendisk *, sector_t *);
+typedef void (prepare_flush_fn) (struct request_queue *, struct request *);
 typedef void (softirq_done_fn)(struct request *);
 
 enum blk_queue_state {
@@ -626,13 +625,13 @@ extern unsigned long blk_max_low_pfn, blk_max_pfn;
 
 #ifdef CONFIG_BOUNCE
 extern int init_emergency_isa_pool(void);
-extern void blk_queue_bounce(request_queue_t *q, struct bio **bio);
+extern void blk_queue_bounce(struct request_queue *q, struct bio **bio);
 #else
 static inline int init_emergency_isa_pool(void)
 {
 	return 0;
 }
-static inline void blk_queue_bounce(request_queue_t *q, struct bio **bio)
+static inline void blk_queue_bounce(struct request_queue *q, struct bio **bio)
 {
 }
 #endif /* CONFIG_MMU */
@@ -646,14 +645,14 @@ extern void blk_unregister_queue(struct gendisk *disk);
 extern void register_disk(struct gendisk *dev);
 extern void generic_make_request(struct bio *bio);
 extern void blk_put_request(struct request *);
-extern void __blk_put_request(request_queue_t *, struct request *);
+extern void __blk_put_request(struct request_queue *, struct request *);
 extern void blk_end_sync_rq(struct request *rq, int error);
-extern struct request *blk_get_request(request_queue_t *, int, gfp_t);
-extern void blk_insert_request(request_queue_t *, struct request *, int, void *);
-extern void blk_requeue_request(request_queue_t *, struct request *);
-extern void blk_plug_device(request_queue_t *);
-extern int blk_remove_plug(request_queue_t *);
-extern void blk_recount_segments(request_queue_t *, struct bio *);
+extern struct request *blk_get_request(struct request_queue *, int, gfp_t);
+extern void blk_insert_request(struct request_queue *, struct request *, int, void *);
+extern void blk_requeue_request(struct request_queue *, struct request *);
+extern void blk_plug_device(struct request_queue *);
+extern int blk_remove_plug(struct request_queue *);
+extern void blk_recount_segments(struct request_queue *, struct bio *);
 extern int scsi_cmd_ioctl(struct file *, struct request_queue *,
 			  struct gendisk *, unsigned int, void __user *);
 extern int sg_scsi_ioctl(struct file *, struct request_queue *,
@@ -662,14 +661,15 @@ extern int sg_scsi_ioctl(struct file *, struct request_queue *,
 /*
  * Temporary export, until SCSI gets fixed up.
  */
-extern int ll_back_merge_fn(request_queue_t *, struct request *, struct bio *);
+extern int ll_back_merge_fn(struct request_queue *, struct request *,
+		struct bio *);
 
 /*
  * A queue has just exitted congestion.  Note this in the global counter of
  * congested queues, and wake up anyone who was waiting for requests to be
  * put back.
  */
-static inline void blk_clear_queue_congested(request_queue_t *q, int rw)
+static inline void blk_clear_queue_congested(struct request_queue *q, int rw)
 {
 	clear_bdi_congested(&q->backing_dev_info, rw);
 }
@@ -678,29 +678,29 @@ static inline void blk_clear_queue_congested(request_queue_t *q, int rw)
  * A queue has just entered congestion.  Flag that in the queue's VM-visible
  * state flags and increment the global gounter of congested queues.
  */
-static inline void blk_set_queue_congested(request_queue_t *q, int rw)
+static inline void blk_set_queue_congested(struct request_queue *q, int rw)
 {
 	set_bdi_congested(&q->backing_dev_info, rw);
 }
 
-extern void blk_start_queue(request_queue_t *q);
-extern void blk_stop_queue(request_queue_t *q);
+extern void blk_start_queue(struct request_queue *q);
+extern void blk_stop_queue(struct request_queue *q);
 extern void blk_sync_queue(struct request_queue *q);
-extern void __blk_stop_queue(request_queue_t *q);
-extern void blk_run_queue(request_queue_t *);
-extern void blk_start_queueing(request_queue_t *);
-extern int blk_rq_map_user(request_queue_t *, struct request *, void __user *, unsigned long);
+extern void __blk_stop_queue(struct request_queue *q);
+extern void blk_run_queue(struct request_queue *);
+extern void blk_start_queueing(struct request_queue *);
+extern int blk_rq_map_user(struct request_queue *, struct request *, void __user *, unsigned long);
 extern int blk_rq_unmap_user(struct bio *);
-extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, gfp_t);
-extern int blk_rq_map_user_iov(request_queue_t *, struct request *,
+extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t);
+extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
 			       struct sg_iovec *, int, unsigned int);
-extern int blk_execute_rq(request_queue_t *, struct gendisk *,
+extern int blk_execute_rq(struct request_queue *, struct gendisk *,
 			  struct request *, int);
-extern void blk_execute_rq_nowait(request_queue_t *, struct gendisk *,
+extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
 				  struct request *, int, rq_end_io_fn *);
 extern int blk_verify_command(unsigned char *, int);
 
-static inline request_queue_t *bdev_get_queue(struct block_device *bdev)
+static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
 {
 	return bdev->bd_disk->queue;
 }
@@ -749,41 +749,41 @@ static inline void blkdev_dequeue_request(struct request *req)
 /*
  * Access functions for manipulating queue properties
  */
-extern request_queue_t *blk_init_queue_node(request_fn_proc *rfn,
+extern struct request_queue *blk_init_queue_node(request_fn_proc *rfn,
 					spinlock_t *lock, int node_id);
-extern request_queue_t *blk_init_queue(request_fn_proc *, spinlock_t *);
-extern void blk_cleanup_queue(request_queue_t *);
-extern void blk_queue_make_request(request_queue_t *, make_request_fn *);
-extern void blk_queue_bounce_limit(request_queue_t *, u64);
-extern void blk_queue_max_sectors(request_queue_t *, unsigned int);
-extern void blk_queue_max_phys_segments(request_queue_t *, unsigned short);
-extern void blk_queue_max_hw_segments(request_queue_t *, unsigned short);
-extern void blk_queue_max_segment_size(request_queue_t *, unsigned int);
-extern void blk_queue_hardsect_size(request_queue_t *, unsigned short);
-extern void blk_queue_stack_limits(request_queue_t *t, request_queue_t *b);
-extern void blk_queue_segment_boundary(request_queue_t *, unsigned long);
-extern void blk_queue_prep_rq(request_queue_t *, prep_rq_fn *pfn);
-extern void blk_queue_merge_bvec(request_queue_t *, merge_bvec_fn *);
-extern void blk_queue_dma_alignment(request_queue_t *, int);
-extern void blk_queue_softirq_done(request_queue_t *, softirq_done_fn *);
+extern struct request_queue *blk_init_queue(request_fn_proc *, spinlock_t *);
+extern void blk_cleanup_queue(struct request_queue *);
+extern void blk_queue_make_request(struct request_queue *, make_request_fn *);
+extern void blk_queue_bounce_limit(struct request_queue *, u64);
+extern void blk_queue_max_sectors(struct request_queue *, unsigned int);
+extern void blk_queue_max_phys_segments(struct request_queue *, unsigned short);
+extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short);
+extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
+extern void blk_queue_hardsect_size(struct request_queue *, unsigned short);
+extern void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b);
+extern void blk_queue_segment_boundary(struct request_queue *, unsigned long);
+extern void blk_queue_prep_rq(struct request_queue *, prep_rq_fn *pfn);
+extern void blk_queue_merge_bvec(struct request_queue *, merge_bvec_fn *);
+extern void blk_queue_dma_alignment(struct request_queue *, int);
+extern void blk_queue_softirq_done(struct request_queue *, softirq_done_fn *);
 extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
-extern int blk_queue_ordered(request_queue_t *, unsigned, prepare_flush_fn *);
-extern void blk_queue_issue_flush_fn(request_queue_t *, issue_flush_fn *);
-extern int blk_do_ordered(request_queue_t *, struct request **);
-extern unsigned blk_ordered_cur_seq(request_queue_t *);
+extern int blk_queue_ordered(struct request_queue *, unsigned, prepare_flush_fn *);
+extern void blk_queue_issue_flush_fn(struct request_queue *, issue_flush_fn *);
+extern int blk_do_ordered(struct request_queue *, struct request **);
+extern unsigned blk_ordered_cur_seq(struct request_queue *);
 extern unsigned blk_ordered_req_seq(struct request *);
-extern void blk_ordered_complete_seq(request_queue_t *, unsigned, int);
+extern void blk_ordered_complete_seq(struct request_queue *, unsigned, int);
 
-extern int blk_rq_map_sg(request_queue_t *, struct request *, struct scatterlist *);
+extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *);
 extern void blk_dump_rq_flags(struct request *, char *);
-extern void generic_unplug_device(request_queue_t *);
-extern void __generic_unplug_device(request_queue_t *);
+extern void generic_unplug_device(struct request_queue *);
+extern void __generic_unplug_device(struct request_queue *);
 extern long nr_blockdev_pages(void);
 
-int blk_get_queue(request_queue_t *);
-request_queue_t *blk_alloc_queue(gfp_t);
-request_queue_t *blk_alloc_queue_node(gfp_t, int);
-extern void blk_put_queue(request_queue_t *);
+int blk_get_queue(struct request_queue *);
+struct request_queue *blk_alloc_queue(gfp_t);
+struct request_queue *blk_alloc_queue_node(gfp_t, int);
+extern void blk_put_queue(struct request_queue *);
 
 /*
  * tag stuff
@@ -791,13 +791,13 @@ extern void blk_put_queue(request_queue_t *);
 #define blk_queue_tag_depth(q)		((q)->queue_tags->busy)
 #define blk_queue_tag_queue(q)		((q)->queue_tags->busy < (q)->queue_tags->max_depth)
 #define blk_rq_tagged(rq)		((rq)->cmd_flags & REQ_QUEUED)
-extern int blk_queue_start_tag(request_queue_t *, struct request *);
-extern struct request *blk_queue_find_tag(request_queue_t *, int);
-extern void blk_queue_end_tag(request_queue_t *, struct request *);
-extern int blk_queue_init_tags(request_queue_t *, int, struct blk_queue_tag *);
-extern void blk_queue_free_tags(request_queue_t *);
-extern int blk_queue_resize_tags(request_queue_t *, int);
-extern void blk_queue_invalidate_tags(request_queue_t *);
+extern int blk_queue_start_tag(struct request_queue *, struct request *);
+extern struct request *blk_queue_find_tag(struct request_queue *, int);
+extern void blk_queue_end_tag(struct request_queue *, struct request *);
+extern int blk_queue_init_tags(struct request_queue *, int, struct blk_queue_tag *);
+extern void blk_queue_free_tags(struct request_queue *);
+extern int blk_queue_resize_tags(struct request_queue *, int);
+extern void blk_queue_invalidate_tags(struct request_queue *);
 extern struct blk_queue_tag *blk_init_tags(int);
 extern void blk_free_tags(struct blk_queue_tag *);
 
@@ -809,7 +809,7 @@ static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
 	return bqt->tag_index[tag];
 }
 
-extern void blk_rq_bio_prep(request_queue_t *, struct request *, struct bio *);
+extern void blk_rq_bio_prep(struct request_queue *, struct request *, struct bio *);
 extern int blkdev_issue_flush(struct block_device *, sector_t *);
 
 #define MAX_PHYS_SEGMENTS 128
@@ -821,7 +821,7 @@ extern int blkdev_issue_flush(struct block_device *, sector_t *);
 
 #define blkdev_entry_to_request(entry) list_entry((entry), struct request, queuelist)
 
-static inline int queue_hardsect_size(request_queue_t *q)
+static inline int queue_hardsect_size(struct request_queue *q)
 {
 	int retval = 512;
 
@@ -836,7 +836,7 @@ static inline int bdev_hardsect_size(struct block_device *bdev)
 	return queue_hardsect_size(bdev_get_queue(bdev));
 }
 
-static inline int queue_dma_alignment(request_queue_t *q)
+static inline int queue_dma_alignment(struct request_queue *q)
 {
 	int retval = 511;
 
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 3680ff9a30e..90874a5d7d7 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -144,7 +144,7 @@ struct blk_user_trace_setup {
 
 #if defined(CONFIG_BLK_DEV_IO_TRACE)
 extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
-extern void blk_trace_shutdown(request_queue_t *);
+extern void blk_trace_shutdown(struct request_queue *);
 extern void __blk_add_trace(struct blk_trace *, sector_t, int, int, u32, int, int, void *);
 
 /**
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index e88fcbc77f8..e8f42133a61 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -5,29 +5,29 @@
 
 #ifdef CONFIG_BLOCK
 
-typedef int (elevator_merge_fn) (request_queue_t *, struct request **,
+typedef int (elevator_merge_fn) (struct request_queue *, struct request **,
 				 struct bio *);
 
-typedef void (elevator_merge_req_fn) (request_queue_t *, struct request *, struct request *);
+typedef void (elevator_merge_req_fn) (struct request_queue *, struct request *, struct request *);
 
-typedef void (elevator_merged_fn) (request_queue_t *, struct request *, int);
+typedef void (elevator_merged_fn) (struct request_queue *, struct request *, int);
 
-typedef int (elevator_allow_merge_fn) (request_queue_t *, struct request *, struct bio *);
+typedef int (elevator_allow_merge_fn) (struct request_queue *, struct request *, struct bio *);
 
-typedef int (elevator_dispatch_fn) (request_queue_t *, int);
+typedef int (elevator_dispatch_fn) (struct request_queue *, int);
 
-typedef void (elevator_add_req_fn) (request_queue_t *, struct request *);
-typedef int (elevator_queue_empty_fn) (request_queue_t *);
-typedef struct request *(elevator_request_list_fn) (request_queue_t *, struct request *);
-typedef void (elevator_completed_req_fn) (request_queue_t *, struct request *);
-typedef int (elevator_may_queue_fn) (request_queue_t *, int);
+typedef void (elevator_add_req_fn) (struct request_queue *, struct request *);
+typedef int (elevator_queue_empty_fn) (struct request_queue *);
+typedef struct request *(elevator_request_list_fn) (struct request_queue *, struct request *);
+typedef void (elevator_completed_req_fn) (struct request_queue *, struct request *);
+typedef int (elevator_may_queue_fn) (struct request_queue *, int);
 
-typedef int (elevator_set_req_fn) (request_queue_t *, struct request *, gfp_t);
+typedef int (elevator_set_req_fn) (struct request_queue *, struct request *, gfp_t);
 typedef void (elevator_put_req_fn) (struct request *);
-typedef void (elevator_activate_req_fn) (request_queue_t *, struct request *);
-typedef void (elevator_deactivate_req_fn) (request_queue_t *, struct request *);
+typedef void (elevator_activate_req_fn) (struct request_queue *, struct request *);
+typedef void (elevator_deactivate_req_fn) (struct request_queue *, struct request *);
 
-typedef void *(elevator_init_fn) (request_queue_t *);
+typedef void *(elevator_init_fn) (struct request_queue *);
 typedef void (elevator_exit_fn) (elevator_t *);
 
 struct elevator_ops
@@ -94,27 +94,27 @@ struct elevator_queue
 /*
  * block elevator interface
  */
-extern void elv_dispatch_sort(request_queue_t *, struct request *);
-extern void elv_dispatch_add_tail(request_queue_t *, struct request *);
-extern void elv_add_request(request_queue_t *, struct request *, int, int);
-extern void __elv_add_request(request_queue_t *, struct request *, int, int);
-extern void elv_insert(request_queue_t *, struct request *, int);
-extern int elv_merge(request_queue_t *, struct request **, struct bio *);
-extern void elv_merge_requests(request_queue_t *, struct request *,
+extern void elv_dispatch_sort(struct request_queue *, struct request *);
+extern void elv_dispatch_add_tail(struct request_queue *, struct request *);
+extern void elv_add_request(struct request_queue *, struct request *, int, int);
+extern void __elv_add_request(struct request_queue *, struct request *, int, int);
+extern void elv_insert(struct request_queue *, struct request *, int);
+extern int elv_merge(struct request_queue *, struct request **, struct bio *);
+extern void elv_merge_requests(struct request_queue *, struct request *,
 			       struct request *);
-extern void elv_merged_request(request_queue_t *, struct request *, int);
-extern void elv_dequeue_request(request_queue_t *, struct request *);
-extern void elv_requeue_request(request_queue_t *, struct request *);
-extern int elv_queue_empty(request_queue_t *);
+extern void elv_merged_request(struct request_queue *, struct request *, int);
+extern void elv_dequeue_request(struct request_queue *, struct request *);
+extern void elv_requeue_request(struct request_queue *, struct request *);
+extern int elv_queue_empty(struct request_queue *);
 extern struct request *elv_next_request(struct request_queue *q);
-extern struct request *elv_former_request(request_queue_t *, struct request *);
-extern struct request *elv_latter_request(request_queue_t *, struct request *);
-extern int elv_register_queue(request_queue_t *q);
-extern void elv_unregister_queue(request_queue_t *q);
-extern int elv_may_queue(request_queue_t *, int);
-extern void elv_completed_request(request_queue_t *, struct request *);
-extern int elv_set_request(request_queue_t *, struct request *, gfp_t);
-extern void elv_put_request(request_queue_t *, struct request *);
+extern struct request *elv_former_request(struct request_queue *, struct request *);
+extern struct request *elv_latter_request(struct request_queue *, struct request *);
+extern int elv_register_queue(struct request_queue *q);
+extern void elv_unregister_queue(struct request_queue *q);
+extern int elv_may_queue(struct request_queue *, int);
+extern void elv_completed_request(struct request_queue *, struct request *);
+extern int elv_set_request(struct request_queue *, struct request *, gfp_t);
+extern void elv_put_request(struct request_queue *, struct request *);
 
 /*
  * io scheduler registration
@@ -125,18 +125,18 @@ extern void elv_unregister(struct elevator_type *);
 /*
  * io scheduler sysfs switching
  */
-extern ssize_t elv_iosched_show(request_queue_t *, char *);
-extern ssize_t elv_iosched_store(request_queue_t *, const char *, size_t);
+extern ssize_t elv_iosched_show(struct request_queue *, char *);
+extern ssize_t elv_iosched_store(struct request_queue *, const char *, size_t);
 
-extern int elevator_init(request_queue_t *, char *);
+extern int elevator_init(struct request_queue *, char *);
 extern void elevator_exit(elevator_t *);
 extern int elv_rq_merge_ok(struct request *, struct bio *);
 
 /*
  * Helper functions.
  */
-extern struct request *elv_rb_former_request(request_queue_t *, struct request *);
-extern struct request *elv_rb_latter_request(request_queue_t *, struct request *);
+extern struct request *elv_rb_former_request(struct request_queue *, struct request *);
+extern struct request *elv_rb_latter_request(struct request_queue *, struct request *);
 
 /*
  * rb support functions.
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 5f5daad8bc5..d71d0121b7f 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -555,7 +555,7 @@ typedef struct ide_drive_s {
 	char		name[4];	/* drive name, such as "hda" */
         char            driver_req[10];	/* requests specific driver */
 
-	request_queue_t		*queue;	/* request queue */
+	struct request_queue	*queue;	/* request queue */
 
 	struct request		*rq;	/* current request */
 	struct ide_drive_s 	*next;	/* circular list of hwgroup drives */
@@ -1206,7 +1206,7 @@ extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
 extern int ide_spin_wait_hwgroup(ide_drive_t *);
 extern void ide_timer_expiry(unsigned long);
 extern irqreturn_t ide_intr(int irq, void *dev_id);
-extern void do_ide_request(request_queue_t *);
+extern void do_ide_request(struct request_queue *);
 
 void ide_init_disk(struct gendisk *, ide_drive_t *);
 
diff --git a/include/linux/loop.h b/include/linux/loop.h
index 0b99b31f017..26a0a103898 100644
--- a/include/linux/loop.h
+++ b/include/linux/loop.h
@@ -63,7 +63,7 @@ struct loop_device {
 	struct task_struct	*lo_thread;
 	wait_queue_head_t	lo_event;
 
-	request_queue_t		*lo_queue;
+	struct request_queue	*lo_queue;
 	struct gendisk		*lo_disk;
 	struct list_head	lo_list;
 };
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 28ac632b42d..dcb729244f4 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -227,7 +227,7 @@ struct mddev_s
 	unsigned int			safemode_delay;
 	struct timer_list		safemode_timer;
 	atomic_t			writes_pending; 
-	request_queue_t			*queue;	/* for plugging ... */
+	struct request_queue		*queue;	/* for plugging ... */
 
 	atomic_t                        write_behind; /* outstanding async IO */
 	unsigned int                    max_write_behind; /* 0 = sync */
@@ -265,7 +265,7 @@ struct mdk_personality
 	int level;
 	struct list_head list;
 	struct module *owner;
-	int (*make_request)(request_queue_t *q, struct bio *bio);
+	int (*make_request)(struct request_queue *q, struct bio *bio);
 	int (*run)(mddev_t *mddev);
 	int (*stop)(mddev_t *mddev);
 	void (*status)(struct seq_file *seq, mddev_t *mddev);
diff --git a/include/scsi/sd.h b/include/scsi/sd.h
index 5261488e110..78583fee0ab 100644
--- a/include/scsi/sd.h
+++ b/include/scsi/sd.h
@@ -57,7 +57,7 @@ static int sd_resume(struct device *dev);
 static void sd_rescan(struct device *);
 static int  sd_init_command(struct scsi_cmnd *);
 static int  sd_issue_flush(struct device *, sector_t *);
-static void sd_prepare_flush(request_queue_t *, struct request *);
+static void sd_prepare_flush(struct request_queue *, struct request *);
 static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
 static void scsi_disk_release(struct class_device *cdev);
 static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
diff --git a/mm/bounce.c b/mm/bounce.c
index ad401fc5744..179fe38a241 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -190,7 +190,7 @@ static int bounce_end_io_read_isa(struct bio *bio, unsigned int bytes_done, int
 	return 0;
 }
 
-static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
+static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
 			       mempool_t *pool)
 {
 	struct page *page;
@@ -275,7 +275,7 @@ static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
 	*bio_orig = bio;
 }
 
-void blk_queue_bounce(request_queue_t *q, struct bio **bio_orig)
+void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
 {
 	mempool_t *pool;
 
-- 
cgit v1.2.3-70-g09d2


From b8b275efc28e34f9b1d1e382d0b02dfa381b2a79 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 10 Jul 2007 15:55:43 +0900
Subject: ata_piix: fix suspend/resume for some TOSHIBA laptops

ACPI implementations in several TOSHIBA laptops are weird and burn cpu
cycles for tens of seconds while trying to suspend if the PCI device
for the ATA controller is disabled when the ACPI suspend is called.

This patch uses DMI to match those machines and bypass device disable
on those machines during suspend.  As the device needs to be put into
enabled state on resume without affecting PCI enable count, matching
resume callback uses __pci_reenable_device().

This bug is reported in bugzilla bug 7780.

  http://bugzilla.kernel.org/show_bug.cgi?id=7780

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++-
 include/linux/libata.h |   2 +
 2 files changed, 113 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index d9fa329fd15..ad070861bb5 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -91,6 +91,7 @@
 #include <linux/device.h>
 #include <scsi/scsi_host.h>
 #include <linux/libata.h>
+#include <linux/dmi.h>
 
 #define DRV_NAME	"ata_piix"
 #define DRV_VERSION	"2.11"
@@ -140,6 +141,9 @@ enum {
 	RV			= -3, /* reserved */
 
 	PIIX_AHCI_DEVICE	= 6,
+
+	/* host->flags bits */
+	PIIX_HOST_BROKEN_SUSPEND = (1 << 24),
 };
 
 struct piix_map_db {
@@ -159,6 +163,10 @@ static void piix_set_piomode (struct ata_port *ap, struct ata_device *adev);
 static void piix_set_dmamode (struct ata_port *ap, struct ata_device *adev);
 static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev);
 static int ich_pata_cable_detect(struct ata_port *ap);
+#ifdef CONFIG_PM
+static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
+static int piix_pci_device_resume(struct pci_dev *pdev);
+#endif
 
 static unsigned int in_module_init = 1;
 
@@ -255,8 +263,8 @@ static struct pci_driver piix_pci_driver = {
 	.probe			= piix_init_one,
 	.remove			= ata_pci_remove_one,
 #ifdef CONFIG_PM
-	.suspend		= ata_pci_device_suspend,
-	.resume			= ata_pci_device_resume,
+	.suspend		= piix_pci_device_suspend,
+	.resume			= piix_pci_device_resume,
 #endif
 };
 
@@ -881,6 +889,107 @@ static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	do_pata_set_dmamode(ap, adev, 1);
 }
 
+#ifdef CONFIG_PM
+static struct dmi_system_id piix_broken_suspend_dmi_table[] = {
+	{
+		.ident = "TECRA M5",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
+		},
+	},
+	{
+		.ident = "Satellite U200",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
+		},
+	},
+	{
+		.ident = "Satellite U205",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
+		},
+	},
+	{
+		.ident = "Portege M500",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
+		},
+	},
+	{ }
+};
+
+static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
+{
+	struct ata_host *host = dev_get_drvdata(&pdev->dev);
+	unsigned long flags;
+	int rc = 0;
+
+	rc = ata_host_suspend(host, mesg);
+	if (rc)
+		return rc;
+
+	/* Some braindamaged ACPI suspend implementations expect the
+	 * controller to be awake on entry; otherwise, it burns cpu
+	 * cycles and power trying to do something to the sleeping
+	 * beauty.
+	 */
+	if (dmi_check_system(piix_broken_suspend_dmi_table) &&
+	    mesg.event == PM_EVENT_SUSPEND) {
+		pci_save_state(pdev);
+
+		/* mark its power state as "unknown", since we don't
+		 * know if e.g. the BIOS will change its device state
+		 * when we suspend.
+		 */
+		if (pdev->current_state == PCI_D0)
+			pdev->current_state = PCI_UNKNOWN;
+
+		/* tell resume that it's waking up from broken suspend */
+		spin_lock_irqsave(&host->lock, flags);
+		host->flags |= PIIX_HOST_BROKEN_SUSPEND;
+		spin_unlock_irqrestore(&host->lock, flags);
+	} else
+		ata_pci_device_do_suspend(pdev, mesg);
+
+	return 0;
+}
+
+static int piix_pci_device_resume(struct pci_dev *pdev)
+{
+	struct ata_host *host = dev_get_drvdata(&pdev->dev);
+	unsigned long flags;
+	int rc;
+
+	if (host->flags & PIIX_HOST_BROKEN_SUSPEND) {
+		spin_lock_irqsave(&host->lock, flags);
+		host->flags &= ~PIIX_HOST_BROKEN_SUSPEND;
+		spin_unlock_irqrestore(&host->lock, flags);
+
+		pci_set_power_state(pdev, PCI_D0);
+		pci_restore_state(pdev);
+
+		/* PCI device wasn't disabled during suspend.  Use
+		 * __pci_reenable_device() to avoid affecting the
+		 * enable count.
+		 */
+		rc = __pci_reenable_device(pdev);
+		if (rc)
+			dev_printk(KERN_ERR, &pdev->dev, "failed to enable "
+				   "device after resume (%d)\n", rc);
+	} else
+		rc = ata_pci_device_do_resume(pdev);
+
+	if (rc == 0)
+		ata_host_resume(host);
+
+	return rc;
+}
+#endif
+
 #define AHCI_PCI_BAR 5
 #define AHCI_GLOBAL_CTL 0x04
 #define AHCI_ENABLE (1 << 31)
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 9aa6c10f7bb..41978a55731 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -216,6 +216,8 @@ enum {
 	ATA_HOST_SIMPLEX	= (1 << 0),	/* Host is simplex, one DMA channel per host only */
 	ATA_HOST_STARTED	= (1 << 1),	/* Host started */
 
+	/* bits 24:31 of host->flags are reserved for LLD specific flags */
+
 	/* various lengths of time */
 	ATA_TMOUT_BOOT		= 30 * HZ,	/* heuristic */
 	ATA_TMOUT_BOOT_QUICK	= 7 * HZ,	/* heuristic */
-- 
cgit v1.2.3-70-g09d2


From 5c8d52015c09b42632a73896f8a80cff64c5c1d1 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Fri, 20 Jul 2007 15:34:49 +0100
Subject: pata_ali: Correct HP detect

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_ali.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 010436795d2..e8a28e94fe4 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -45,7 +45,7 @@ static struct dmi_system_id cable_dmi_table[] = {
 		.ident = "HP Pavilion N5430",
 		.matches = {
 			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
-			DMI_MATCH(DMI_BOARD_NAME, "OmniBook N32N-736"),
+			DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
 		},
 	},
 	{ }
-- 
cgit v1.2.3-70-g09d2


From 64a8170975947978ea4094dd6c4b1f41119d6ae6 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Tue, 24 Jul 2007 15:17:48 +0100
Subject: pata_hpt37x: Fix 2.6.22 clock PLL regression

	Just one version of Linux ago
	The PLL code broke - oh no!
	But set the right mode
	And fix up the code
	Makes the PLL timing sync go

[whatever happened to the sailor from Nantucket, hero of many limericks?  -jg]

Closes-bug: #8791
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_hpt37x.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index b0af65aadde..84d9c556856 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -26,7 +26,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_hpt37x"
-#define DRV_VERSION	"0.6.6"
+#define DRV_VERSION	"0.6.7"
 
 struct hpt_clock {
 	u8	xfer_speed;
@@ -1103,17 +1103,17 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 
 		/* Select the DPLL clock. */
 		pci_write_config_byte(dev, 0x5b, 0x21);
-		pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
+		pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
 
 		for(adjust = 0; adjust < 8; adjust++) {
 			if (hpt37x_calibrate_dpll(dev))
 				break;
 			/* See if it'll settle at a fractionally different clock */
-			if ((adjust & 3) == 3) {
-				f_low --;
-				f_high ++;
-			}
-			pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
+			if (adjust & 1)
+				f_low -= adjust >> 1;
+			else
+				f_high += adjust >> 1;
+			pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
 		}
 		if (adjust == 8) {
 			printk(KERN_WARNING "hpt37x: DPLL did not stabilize.\n");
-- 
cgit v1.2.3-70-g09d2


From dbf0c89c80e47a2a132048dcded0dcc2a59c74ad Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 26 Jul 2007 18:43:01 +0100
Subject: pata_cmd64x: Correct the speed ranges

I must have been half asleep when doing the original code

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_cmd64x.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index dc443e7dc37..e34b632487d 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -31,7 +31,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_cmd64x"
-#define DRV_VERSION "0.2.3"
+#define DRV_VERSION "0.2.4"
 
 /*
  * CMD64x specific registers definition.
@@ -397,7 +397,7 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 			.flags = ATA_FLAG_SLAVE_POSS,
 			.pio_mask = 0x1f,
 			.mwdma_mask = 0x07,
-			.udma_mask = ATA_UDMA1,
+			.udma_mask = ATA_UDMA2,
 			.port_ops = &cmd64x_port_ops
 		},
 		{	/* CMD 646 rev 1  */
@@ -412,7 +412,7 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 			.flags = ATA_FLAG_SLAVE_POSS,
 			.pio_mask = 0x1f,
 			.mwdma_mask = 0x07,
-			.udma_mask = ATA_UDMA2,
+			.udma_mask = ATA_UDMA4,
 			.port_ops = &cmd648_port_ops
 		},
 		{	/* CMD 649 */
@@ -420,7 +420,7 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 			.flags = ATA_FLAG_SLAVE_POSS,
 			.pio_mask = 0x1f,
 			.mwdma_mask = 0x07,
-			.udma_mask = ATA_UDMA3,
+			.udma_mask = ATA_UDMA5,
 			.port_ops = &cmd648_port_ops
 		}
 	};
-- 
cgit v1.2.3-70-g09d2


From 6fdc99a224bd52020c602c3d4d57e5f8a75f6bb8 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 26 Jul 2007 18:41:30 +0100
Subject: libata-sff; Unbreak non DMA capable controllers again

Seems nobody else is checking/testing this case as it keeps getting
horked.

If we have no BAR4 mapping on an SFF controller this is *NOT* an error,
it just means it isn't doing BMDMA.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-sff.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 6c289c7b132..1cce2198baa 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -573,6 +573,10 @@ int ata_pci_init_bmdma(struct ata_host *host)
 	struct pci_dev *pdev = to_pci_dev(gdev);
 	int i, rc;
 
+	/* No BAR4 allocation: No DMA */
+	if (pci_resource_start(pdev, 4) == 0)
+		return 0;
+
 	/* TODO: If we get no DMA mask we should fall back to PIO */
 	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 	if (rc)
-- 
cgit v1.2.3-70-g09d2


From 0b62e13b5c9b4871641973e024cc9dd440b5bb58 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 27 Jul 2007 14:43:35 +0900
Subject: pci: rename __pci_reenable_device() to pci_reenable_device()

Rename __pci_reenable_device() to pci_reenable_device().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c   | 6 +++---
 drivers/pci/pci-driver.c | 2 +-
 drivers/pci/pci.c        | 7 +++----
 include/linux/pci.h      | 2 +-
 4 files changed, 8 insertions(+), 9 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index ad070861bb5..6089fbc5b89 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -973,10 +973,10 @@ static int piix_pci_device_resume(struct pci_dev *pdev)
 		pci_restore_state(pdev);
 
 		/* PCI device wasn't disabled during suspend.  Use
-		 * __pci_reenable_device() to avoid affecting the
-		 * enable count.
+		 * pci_reenable_device() to avoid affecting the enable
+		 * count.
 		 */
-		rc = __pci_reenable_device(pdev);
+		rc = pci_reenable_device(pdev);
 		if (rc)
 			dev_printk(KERN_ERR, &pdev->dev, "failed to enable "
 				   "device after resume (%d)\n", rc);
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 8e58ea3d95c..004bc248727 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -310,7 +310,7 @@ static int pci_default_resume(struct pci_dev *pci_dev)
 	/* restore the PCI config space */
 	pci_restore_state(pci_dev);
 	/* if the device was enabled before suspend, reenable */
-	retval = __pci_reenable_device(pci_dev);
+	retval = pci_reenable_device(pci_dev);
 	/* if the device was busmaster before the suspend, make it busmaster again */
 	if (pci_dev->is_busmaster)
 		pci_set_master(pci_dev);
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 1ee9cd9c86e..37c00f6fd80 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -695,14 +695,13 @@ static int do_pci_enable_device(struct pci_dev *dev, int bars)
 }
 
 /**
- * __pci_reenable_device - Resume abandoned device
+ * pci_reenable_device - Resume abandoned device
  * @dev: PCI device to be resumed
  *
  *  Note this function is a backend of pci_default_resume and is not supposed
  *  to be called by normal code, write proper resume handler and use it instead.
  */
-int
-__pci_reenable_device(struct pci_dev *dev)
+int pci_reenable_device(struct pci_dev *dev)
 {
 	if (atomic_read(&dev->enable_cnt))
 		return do_pci_enable_device(dev, (1 << PCI_NUM_RESOURCES) - 1);
@@ -1604,7 +1603,7 @@ early_param("pci", pci_setup);
 device_initcall(pci_init);
 
 EXPORT_SYMBOL_GPL(pci_restore_bars);
-EXPORT_SYMBOL(__pci_reenable_device);
+EXPORT_SYMBOL(pci_reenable_device);
 EXPORT_SYMBOL(pci_enable_device_bars);
 EXPORT_SYMBOL(pci_enable_device);
 EXPORT_SYMBOL(pcim_enable_device);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index d8f8a3a9664..e7d8d4e19a5 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -534,7 +534,7 @@ static inline int pci_write_config_dword(struct pci_dev *dev, int where, u32 val
 
 int __must_check pci_enable_device(struct pci_dev *dev);
 int __must_check pci_enable_device_bars(struct pci_dev *dev, int mask);
-int __must_check __pci_reenable_device(struct pci_dev *);
+int __must_check pci_reenable_device(struct pci_dev *);
 int __must_check pcim_enable_device(struct pci_dev *pdev);
 void pcim_pin_device(struct pci_dev *pdev);
 
-- 
cgit v1.2.3-70-g09d2


From 8c3832ebeb049c5744ece888daae253c683257c3 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 27 Jul 2007 14:53:28 +0900
Subject: ata_piix: implement piix_borken_suspend()

Separate out broken suspend blacklist matching into
piix_broken_suspend().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 60 +++++++++++++++++++++++++-------------------------
 1 file changed, 30 insertions(+), 30 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 6089fbc5b89..fb3b9594651 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -890,37 +890,38 @@ static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 }
 
 #ifdef CONFIG_PM
-static struct dmi_system_id piix_broken_suspend_dmi_table[] = {
-	{
-		.ident = "TECRA M5",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
+static int piix_broken_suspend(void)
+{
+	static struct dmi_system_id sysids[] = {
+		{
+			.ident = "TECRA M5",
+			.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+				DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
+			},
 		},
-	},
-	{
-		.ident = "Satellite U200",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
+		{
+			.ident = "Satellite U205",
+			.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+				DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
+			},
 		},
-	},
-	{
-		.ident = "Satellite U205",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
+		{
+			.ident = "Portege M500",
+			.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+				DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
+			},
 		},
-	},
-	{
-		.ident = "Portege M500",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
-		},
-	},
-	{ }
-};
+		{ }
+	};
+
+	if (dmi_check_system(sysids))
+		return 1;
+
+	return 0;
+}
 
 static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
 {
@@ -937,8 +938,7 @@ static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
 	 * cycles and power trying to do something to the sleeping
 	 * beauty.
 	 */
-	if (dmi_check_system(piix_broken_suspend_dmi_table) &&
-	    mesg.event == PM_EVENT_SUSPEND) {
+	if (piix_broken_suspend() && mesg.event == PM_EVENT_SUSPEND) {
 		pci_save_state(pdev);
 
 		/* mark its power state as "unknown", since we don't
-- 
cgit v1.2.3-70-g09d2


From 7abe79c353caf868053c2ddcada7f4c20c8251e6 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 27 Jul 2007 14:55:07 +0900
Subject: ata_piix: add Tecra M3 to broken suspend blacklist

Add Tecra M3 to the broken suspend blacklist.  Tecra M3 doesn't have
proper DMI_PRODUCT_NAME but has an OEM_STRING instead.  Match it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index fb3b9594651..a78832ea81f 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -916,10 +916,18 @@ static int piix_broken_suspend(void)
 		},
 		{ }
 	};
+	static const char *oemstrs[] = {
+		"Tecra M3,",
+	};
+	int i;
 
 	if (dmi_check_system(sysids))
 		return 1;
 
+	for (i = 0; i < ARRAY_SIZE(oemstrs); i++)
+		if (dmi_find_device(DMI_DEV_TYPE_OEM_STRING, oemstrs[i], NULL))
+			return 1;
+
 	return 0;
 }
 
-- 
cgit v1.2.3-70-g09d2


From 5d6aca8defe77dfd0f0169cc015b900129078648 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sat, 28 Jul 2007 16:25:25 +0900
Subject: libata: blacklist SAMSUNG HD401LJ / ZZ100-15 for NCQ

SAMSUNG HD401LJ / ZZ100-15 does spurious completion of NCQ commands.
Disable NCQ.  Reported by Ulrich in bugzilla #8805.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Ulrich <stellplatz-nr.13a@datenparkplatz.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 6001aae0b88..60e78bef469 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3788,6 +3788,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "WDC WD740ADFD-00NLR1", NULL,		ATA_HORKAGE_NONCQ, },
 	{ "FUJITSU MHV2080BH",	"00840028",	ATA_HORKAGE_NONCQ, },
 	{ "ST9160821AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
+	{ "SAMSUNG HD401LJ",	"ZZ100-15",	ATA_HORKAGE_NONCQ, },
 
 	/* Devices with NCQ limits */
 
-- 
cgit v1.2.3-70-g09d2


From 4761c06cb39011c9cc3fef9e6bbfb4c50ceb307d Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Tue, 31 Jul 2007 22:02:41 +0200
Subject: pata_sis: fix MWDMA for <= UDMA66 chipsets and UDMA for UDMA33
 chipsets

* Fix MWDMA timings setup in sis_old_set_dmamode() and sis_66_set_dmamode().

  The old timings were overclocked (even worse behavior than sis5513 IDE driver
  which depends on BIOS to program correct timings), the new timings are taken
  from the datasheet (they match timings from ATA spec).

* Fix UDMA timings setup in sis_old_set_dmamode().

  Misplaced pci_write_config_word() call resulted in UDMA timings never
  being set.

* Fix comments for sis_133_early_set_dmamode() and sis_133_set_dmamode():
  - only the former function handles early SiS 961 bridges
  - both functions lack MWDMA timings setup

* Fix typos in sis_100_set_piomode() and sis_133_set_piomode() comments.

* Bump driver version.

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_sis.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 9a829a7cbc6..66bd0e83ac0 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -2,6 +2,7 @@
  *    pata_sis.c - SiS ATA driver
  *
  *	(C) 2005 Red Hat <alan@redhat.com>
+ *	(C) 2007 Bartlomiej Zolnierkiewicz
  *
  *    Based upon linux/drivers/ide/pci/sis5513.c
  * Copyright (C) 1999-2000	Andre Hedrick <andre@linux-ide.org>
@@ -35,7 +36,7 @@
 #include "sis.h"
 
 #define DRV_NAME	"pata_sis"
-#define DRV_VERSION	"0.5.1"
+#define DRV_VERSION	"0.5.2"
 
 struct sis_chipset {
 	u16 device;				/* PCI host ID */
@@ -237,7 +238,7 @@ static void sis_old_set_piomode (struct ata_port *ap, struct ata_device *adev)
 }
 
 /**
- *	sis_100_set_pioode - Initialize host controller PATA PIO timings
+ *	sis_100_set_piomode - Initialize host controller PATA PIO timings
  *	@ap: Port whose timings we are configuring
  *	@adev: Device we are configuring for.
  *
@@ -262,7 +263,7 @@ static void sis_100_set_piomode (struct ata_port *ap, struct ata_device *adev)
 }
 
 /**
- *	sis_133_set_pioode - Initialize host controller PATA PIO timings
+ *	sis_133_set_piomode - Initialize host controller PATA PIO timings
  *	@ap: Port whose timings we are configuring
  *	@adev: Device we are configuring for.
  *
@@ -334,7 +335,7 @@ static void sis_old_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	int drive_pci = sis_old_port_base(adev);
 	u16 timing;
 
-	const u16 mwdma_bits[] = { 0x707, 0x202, 0x202 };
+	const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
 	const u16 udma_bits[]  = { 0xE000, 0xC000, 0xA000 };
 
 	pci_read_config_word(pdev, drive_pci, &timing);
@@ -342,15 +343,15 @@ static void sis_old_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	if (adev->dma_mode < XFER_UDMA_0) {
 		/* bits 3-0 hold recovery timing bits 8-10 active timing and
 		   the higer bits are dependant on the device */
-		timing &= ~ 0x870F;
+		timing &= ~0x870F;
 		timing |= mwdma_bits[speed];
-		pci_write_config_word(pdev, drive_pci, timing);
 	} else {
 		/* Bit 15 is UDMA on/off, bit 13-14 are cycle time */
 		speed = adev->dma_mode - XFER_UDMA_0;
 		timing &= ~0x6000;
 		timing |= udma_bits[speed];
 	}
+	pci_write_config_word(pdev, drive_pci, timing);
 }
 
 /**
@@ -373,7 +374,7 @@ static void sis_66_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	int drive_pci = sis_old_port_base(adev);
 	u16 timing;
 
-	const u16 mwdma_bits[] = { 0x707, 0x202, 0x202 };
+	const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
 	const u16 udma_bits[]  = { 0xF000, 0xD000, 0xB000, 0xA000, 0x9000};
 
 	pci_read_config_word(pdev, drive_pci, &timing);
@@ -432,8 +433,7 @@ static void sis_100_set_dmamode (struct ata_port *ap, struct ata_device *adev)
  *	@adev: Device to program
  *
  *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
- *	Handles early SiS 961 bridges. Supports MWDMA as well unlike
- *	the old ide/pci driver.
+ *	Handles early SiS 961 bridges.
  *
  *	LOCKING:
  *	None (inherited from caller).
@@ -467,8 +467,6 @@ static void sis_133_early_set_dmamode (struct ata_port *ap, struct ata_device *a
  *	@adev: Device to program
  *
  *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
- *	Handles early SiS 961 bridges. Supports MWDMA as well unlike
- *	the old ide/pci driver.
  *
  *	LOCKING:
  *	None (inherited from caller).
-- 
cgit v1.2.3-70-g09d2


From eba84481c7424f03c792d753fe02d9d6d3609fe0 Mon Sep 17 00:00:00 2001
From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Mon, 6 Aug 2007 16:10:54 +0100
Subject: [ARM] pata_icside: fix the FIXMEs

Alan Cox suggested that the solution to the FIXMEs in pata_icside is
to use a private postreset method to detect the lack of devices on a
port, and in such a case, disable the interrupt for the port.

This patch implements such a method, and removes the hard coded
disable of port 0.  Tested as working.

Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/ata/pata_icside.c | 28 +++++++++++-----------------
 1 file changed, 11 insertions(+), 17 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_icside.c b/drivers/ata/pata_icside.c
index 321d98b0bed..64a711776c4 100644
--- a/drivers/ata/pata_icside.c
+++ b/drivers/ata/pata_icside.c
@@ -330,17 +330,12 @@ static void ata_dummy_noret(struct ata_port *port)
 {
 }
 
-/*
- * We need to shut down unused ports to prevent spurious interrupts.
- * FIXME: the libata core doesn't call this function for PATA interfaces.
- */
-static void pata_icside_port_disable(struct ata_port *ap)
+static void pata_icside_postreset(struct ata_port *ap, unsigned int *classes)
 {
 	struct pata_icside_state *state = ap->host->private_data;
 
-	ata_port_printk(ap, KERN_ERR, "disabling icside port\n");
-
-	ata_port_disable(ap);
+	if (classes[0] != ATA_DEV_NONE || classes[1] != ATA_DEV_NONE)
+		return ata_std_postreset(ap, classes);
 
 	state->port[ap->port_no].disabled = 1;
 
@@ -356,6 +351,12 @@ static void pata_icside_port_disable(struct ata_port *ap)
 	}
 }
 
+static void pata_icside_error_handler(struct ata_port *ap)
+{
+	ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, NULL,
+			   pata_icside_postreset);
+}
+
 static u8 pata_icside_irq_ack(struct ata_port *ap, unsigned int chk_drq)
 {
 	unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
@@ -374,7 +375,7 @@ static u8 pata_icside_irq_ack(struct ata_port *ap, unsigned int chk_drq)
 }
 
 static struct ata_port_operations pata_icside_port_ops = {
-	.port_disable		= pata_icside_port_disable,
+	.port_disable		= ata_port_disable,
 
 	.set_dmamode		= pata_icside_set_dmamode,
 
@@ -397,7 +398,7 @@ static struct ata_port_operations pata_icside_port_ops = {
 
 	.freeze			= ata_bmdma_freeze,
 	.thaw			= ata_bmdma_thaw,
-	.error_handler		= ata_bmdma_error_handler,
+	.error_handler		= pata_icside_error_handler,
 	.post_internal_cmd	= pata_icside_bmdma_stop,
 
 	.irq_clear		= ata_dummy_noret,
@@ -484,13 +485,6 @@ static int __devinit pata_icside_register_v6(struct pata_icside_info *info)
 	state->port[0].port_sel = sel;
 	state->port[1].port_sel = sel | 1;
 
-	/*
-	 * FIXME: work around libata's aversion to calling port_disable.
-	 * This permanently disables interrupts on port 0 - bad luck if
-	 * you have a drive on that port.
-	 */
-	state->port[0].disabled = 1;
-
 	info->base = easi_base;
 	info->irqops = &pata_icside_ops_arcin_v6;
 	info->nr_ports = 2;
-- 
cgit v1.2.3-70-g09d2


From 6a286a6d85bb0da687011b15f268c0e52e8eaba4 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 3 Aug 2007 11:25:50 -0400
Subject: [libata] pata_isapnp: replace missing module device table

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_isapnp.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
index 5525518204e..91a396fa5b2 100644
--- a/drivers/ata/pata_isapnp.c
+++ b/drivers/ata/pata_isapnp.c
@@ -139,6 +139,8 @@ static struct pnp_device_id isapnp_devices[] = {
 	{.id = ""}
 };
 
+MODULE_DEVICE_TABLE(pnp, isapnp_devices);
+
 static struct pnp_driver isapnp_driver = {
 	.name		= DRV_NAME,
 	.id_table	= isapnp_devices,
-- 
cgit v1.2.3-70-g09d2


From cfbf723eb7928879292ee71fa0d118fc4e37b8c9 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Mon, 9 Jul 2007 14:38:41 +0100
Subject: sata_mv: PCI IDs for Hightpoint RocketRaid 1740/1742

Underneath all the HPT packaging, PCI identifiers, binary driver modules
and stuff you find that ...

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_mv.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 8ec520885b9..3acf65e75eb 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -621,6 +621,9 @@ static const struct pci_device_id mv_pci_tbl[] = {
 	{ PCI_VDEVICE(MARVELL, 0x5041), chip_504x },
 	{ PCI_VDEVICE(MARVELL, 0x5080), chip_5080 },
 	{ PCI_VDEVICE(MARVELL, 0x5081), chip_508x },
+	/* RocketRAID 1740/174x have different identifiers */
+	{ PCI_VDEVICE(TTI, 0x1740), chip_508x },
+	{ PCI_VDEVICE(TTI, 0x1742), chip_508x },
 
 	{ PCI_VDEVICE(MARVELL, 0x6040), chip_604x },
 	{ PCI_VDEVICE(MARVELL, 0x6041), chip_604x },
-- 
cgit v1.2.3-70-g09d2


From ac2b04371fffd964b0d1c3369a9972bed7a5c5d9 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 7 Aug 2007 02:43:27 +0900
Subject: ata_piix: update map 10b for ich8m

Fix map entry 10b for ich8.  It's [P0 P2 IDE IDE] like ich6 / ich6m.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: <Kristen Carlson Accardi> kristen.c.accardi@intel.com
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index a78832ea81f..c5b4509c93f 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -436,7 +436,7 @@ static const struct piix_map_db ich8_map_db = {
 		/* PM   PS   SM   SS       MAP */
 		{  P0,  P2,  P1,  P3 }, /* 00b (hardwired when in AHCI) */
 		{  RV,  RV,  RV,  RV },
-		{  IDE,  IDE,  NA,  NA }, /* 10b (IDE mode) */
+		{  P0,  P2, IDE, IDE }, /* 10b (IDE mode) */
 		{  RV,  RV,  RV,  RV },
 	},
 };
-- 
cgit v1.2.3-70-g09d2


From be456b77ffbd3983b5da8eff49a70a701333f68b Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Thu, 9 Aug 2007 23:19:34 +0200
Subject: pata_artop: fix UDMA5 for AEC6280[R] and UDMA6 for AEC6880[R]

Maximum supported UDMA mode for AEC6280[R] is UDMA5 (not UDMA4)
and for AEC6880[R] it is UDMA6 (not UDMA5):

* Fix the problem by adding missing struct ata_port_info to artop_init_one().

* Use the right naming (s/626/628/).

* Bump driver version.

Fixes IDE->libata regression, problem was never present in IDE aec62xx driver.

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_artop.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
index ce589d96ca4..b5352ebecef 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -2,6 +2,7 @@
  *    pata_artop.c - ARTOP ATA controller driver
  *
  *	(C) 2006 Red Hat <alan@redhat.com>
+ *	(C) 2007 Bartlomiej Zolnierkiewicz
  *
  *    Based in part on drivers/ide/pci/aec62xx.c
  *	Copyright (C) 1999-2002	Andre Hedrick <andre@linux-ide.org>
@@ -28,7 +29,7 @@
 #include <linux/ata.h>
 
 #define DRV_NAME	"pata_artop"
-#define DRV_VERSION	"0.4.3"
+#define DRV_VERSION	"0.4.4"
 
 /*
  *	The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
@@ -430,7 +431,7 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 		.udma_mask 	= ATA_UDMA4,
 		.port_ops	= &artop6260_ops,
 	};
-	static const struct ata_port_info info_626x_fast = {
+	static const struct ata_port_info info_628x = {
 		.sht		= &artop_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS,
 		.pio_mask	= 0x1f,	/* pio0-4 */
@@ -438,6 +439,14 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 		.udma_mask 	= ATA_UDMA5,
 		.port_ops	= &artop6260_ops,
 	};
+	static const struct ata_port_info info_628x_fast = {
+		.sht		= &artop_sht,
+		.flags		= ATA_FLAG_SLAVE_POSS,
+		.pio_mask	= 0x1f,	/* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask 	= ATA_UDMA6,
+		.port_ops	= &artop6260_ops,
+	};
 	const struct ata_port_info *ppi[] = { NULL, NULL };
 
 	if (!printed_version++)
@@ -455,13 +464,13 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 	}
 	else if (id->driver_data == 1)	/* 6260 */
 		ppi[0] = &info_626x;
-	else if (id->driver_data == 2)	{ /* 6260 or 6260 + fast */
+	else if (id->driver_data == 2)	{ /* 6280 or 6280 + fast */
 		unsigned long io = pci_resource_start(pdev, 4);
 		u8 reg;
 
-		ppi[0] = &info_626x;
+		ppi[0] = &info_628x;
 		if (inb(io) & 0x10)
-			ppi[0] = &info_626x_fast;
+			ppi[0] = &info_628x_fast;
 		/* Mac systems come up with some registers not set as we
 		   will need them */
 
-- 
cgit v1.2.3-70-g09d2


From d44a65f7bb0dae0bcc78de336b55a75b30ec2d2a Mon Sep 17 00:00:00 2001
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Date: Fri, 10 Aug 2007 20:58:46 +0400
Subject: pata_hpt37x: actually clock HPT374 with 50 MHz DPLL (take 2)

The DPLL tuning code always set up it for 66 MHz due to wrong UltraDMA mask
including mode 5 used to check for the necessity of 66 MHz clocking -- this
caused 66 MHz clock to be used for HPT374 chip that does not tolerate it.
While fixing this, also remove PLL mode from the TODO list -- I don't think
it's still a relevant item.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_hpt37x.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index 84d9c556856..96bbe7c39be 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -8,12 +8,10 @@
  * Copyright (C) 1999-2003		Andre Hedrick <andre@linux-ide.org>
  * Portions Copyright (C) 2001	        Sun Microsystems, Inc.
  * Portions Copyright (C) 2003		Red Hat Inc
- * Portions Copyright (C) 2005-2006	MontaVista Software, Inc.
+ * Portions Copyright (C) 2005-2007	MontaVista Software, Inc.
  *
  * TODO
- *	PLL mode
- *	Look into engine reset on timeout errors. Should not be
- *		required.
+ *	Look into engine reset on timeout errors. Should not be	required.
  */
 
 #include <linux/kernel.h>
@@ -26,7 +24,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_hpt37x"
-#define DRV_VERSION	"0.6.7"
+#define DRV_VERSION	"0.6.8"
 
 struct hpt_clock {
 	u8	xfer_speed;
@@ -1092,9 +1090,7 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 		int dpll, adjust;
 
 		/* Compute DPLL */
-		dpll = 2;
-		if (port->udma_mask & 0xE0)
-			dpll = 3;
+		dpll = (port->udma_mask & 0xC0) ? 3 : 2;
 
 		f_low = (MHz[clock_slot] * 48) / MHz[dpll];
 		f_high = f_low + 2;
-- 
cgit v1.2.3-70-g09d2


From 80b8987c8feaf07a070f7cdcd55db024e9e200ec Mon Sep 17 00:00:00 2001
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Date: Fri, 10 Aug 2007 21:02:15 +0400
Subject: pata_hpt{37x|3x2n}: fix clock reporting (take 2)

Fix several inconsistencies in these drivers WRT reporting the clocks:

- when using DPLL mode, 'pata_hpt37x' driver reported the DPLL frequency as the
  PCI clock -- make it properly report both clocks and add the same ability to
  the 'pata_hpt3x2n' driver;

- both drivers sometimes use "pata_hpt3*:" and sometimes "hpt3*:" in the
  messages -- make them use only the former one;

- the message about failed DPLL stablizatios deserves KERN_ERR and a bang. :-)

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_hpt37x.c  | 10 ++++++----
 drivers/ata/pata_hpt3x2n.c |  8 +++++---
 2 files changed, 11 insertions(+), 7 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index 96bbe7c39be..c5ddd937dbf 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -24,7 +24,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_hpt37x"
-#define DRV_VERSION	"0.6.8"
+#define DRV_VERSION	"0.6.9"
 
 struct hpt_clock {
 	u8	xfer_speed;
@@ -1112,7 +1112,7 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 			pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
 		}
 		if (adjust == 8) {
-			printk(KERN_WARNING "hpt37x: DPLL did not stabilize.\n");
+			printk(KERN_ERR "pata_hpt37x: DPLL did not stabilize!\n");
 			return -ENODEV;
 		}
 		if (dpll == 3)
@@ -1120,7 +1120,8 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 		else
 			private_data = (void *)hpt37x_timings_50;
 
-		printk(KERN_INFO "hpt37x: Bus clock %dMHz, using DPLL.\n", MHz[dpll]);
+		printk(KERN_INFO "pata_hpt37x: bus clock %dMHz, using %dMHz DPLL.\n",
+		       MHz[clock_slot], MHz[dpll]);
 	} else {
 		private_data = (void *)chip_table->clocks[clock_slot];
 		/*
@@ -1133,7 +1134,8 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 			port = &info_hpt370_33;
 		if (clock_slot < 2 && port == &info_hpt370a)
 			port = &info_hpt370a_33;
-		printk(KERN_INFO "hpt37x: %s: Bus clock %dMHz.\n", chip_table->name, MHz[clock_slot]);
+		printk(KERN_INFO "pata_hpt37x: %s using %dMHz bus clock.\n",
+		       chip_table->name, MHz[clock_slot]);
 	}
 
 	/* Now kick off ATA set up */
diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index aa29cde09f8..f8f234bfc8c 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -8,7 +8,7 @@
  * Copyright (C) 1999-2003		Andre Hedrick <andre@linux-ide.org>
  * Portions Copyright (C) 2001	        Sun Microsystems, Inc.
  * Portions Copyright (C) 2003		Red Hat Inc
- * Portions Copyright (C) 2005-2006	MontaVista Software, Inc.
+ * Portions Copyright (C) 2005-2007	MontaVista Software, Inc.
  *
  *
  * TODO
@@ -25,7 +25,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_hpt3x2n"
-#define DRV_VERSION	"0.3.3"
+#define DRV_VERSION	"0.3.4"
 
 enum {
 	HPT_PCI_FAST	=	(1 << 31),
@@ -579,10 +579,12 @@ static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 		pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
 	}
 	if (adjust == 8) {
-		printk(KERN_WARNING "hpt3x2n: DPLL did not stabilize.\n");
+		printk(KERN_ERR "pata_hpt3x2n: DPLL did not stabilize!\n");
 		return -ENODEV;
 	}
 
+	printk(KERN_INFO "pata_hpt37x: bus clock %dMHz, using 66MHz DPLL.\n",
+	       pci_mhz);
 	/* Set our private data up. We only need a few flags so we use
 	   it directly */
 	port.private_data = NULL;
-- 
cgit v1.2.3-70-g09d2


From 5c08ea019198230a62c601ddf97d0319ae246ad8 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 14 Aug 2007 19:56:04 +0900
Subject: ata_piix: add TECRA M7 to broken suspend list

Add TECRA M7 to broken suspend list.  Reported by Marie Koreen.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Marie Koreen <kbug@koreen.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index c5b4509c93f..071d274afaa 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -900,6 +900,13 @@ static int piix_broken_suspend(void)
 				DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
 			},
 		},
+		{
+			.ident = "TECRA M7",
+			.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+				DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M7"),
+			},
+		},
 		{
 			.ident = "Satellite U205",
 			.matches = {
-- 
cgit v1.2.3-70-g09d2


From fb0582f91fdd62b67bf54a440d7c79b19ed84da8 Mon Sep 17 00:00:00 2001
From: Ryan Power <rpower@sysreset.com>
Date: Fri, 10 Aug 2007 13:59:35 -0700
Subject: libata: adjust libata to ignore errors after spinup

Adjust libata to ignore errors after spinup

This patch is to ignore errors from the spinup attempt if the drive is
in the "standby id" state.

Signed-off-by: Ryan Power <rpower@sysreset.com>
Acked-by: Mark Lord <liml@rtr.ca>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 60e78bef469..99d4fbffb0d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1723,7 +1723,7 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 		tf.protocol = ATA_PROT_NODATA;
 		tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
 		err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
-		if (err_mask) {
+		if (err_mask && id[2] != 0x738c) {
 			rc = -EIO;
 			reason = "SPINUP failed";
 			goto err_out;
-- 
cgit v1.2.3-70-g09d2


From 8270bec40075eec9df8778c1d5da36ef0e535176 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Thu, 16 Aug 2007 03:02:22 +0900
Subject: libata: fix n_sectors failure handling during revalidation

If revalidation fails because device has different n_sectors after
configuration the original n_sectors should be restored before failing
revalidation.  Without this fix, n_sectors difference will incorrectly
and silently pass revalidation when revalidation is retried.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 99d4fbffb0d..9bfe329fb57 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3705,6 +3705,10 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
 			       "%llu != %llu\n",
 			       (unsigned long long)n_sectors,
 			       (unsigned long long)dev->n_sectors);
+
+		/* restore original n_sectors */
+		dev->n_sectors = n_sectors;
+
 		rc = -ENODEV;
 		goto fail;
 	}
-- 
cgit v1.2.3-70-g09d2


From 78c4af0b43e152c40d232137f8cb637f2c58826a Mon Sep 17 00:00:00 2001
From: Mikael Pettersson <mikpe@it.uu.se>
Date: Sat, 18 Aug 2007 22:58:53 +0200
Subject: pata_pdc2027x: PLL detection fixes

Previously I reported that the pata_pdc2027x PLL detection changes
in kernel 2.6.22 broke the driver on my PowerMac:

>pata_pdc2027x: Invalid PLL input clock 1691742kHz, give up!

This is followed by a number of errors and speed reduction
steps on the affected ports.

There are two bugs in pata_pdc2027x's PLL detection code:

1. The PLL counter's start value is read before the chip is
   put in "test mode". Outside of test mode the counter is
   halted, and on the PowerMac the counter is zero because
   the chip hasn't been initialised by its BIOS.

   The fix is to move the read of the start value to after
   test mode is started, but before the mdelay() in test mode.
   This also improves the precision of the PLL detection.

2. The code to compute the number of PLL decrements during the
   mdelay() in test mode fails to consider that the PLL counter
   only is 30 bits wide. If there is a wraparound, it will compute
   an incorrect and much too large value. On the PowerMac, the
   start count is zero, the end count is a large 30-bit value, so
   wraparound occurs and an out of bounds PLL clock is detected.

   The fix is to mask the (start - end) computation to 30 bits.

While debugging this I also noticed that pdc_read_counter()
reads the two halves of the 30-bit PLL counter as 16-bit values,
and then combines them as if the halves only are 15 bits wide.
To avoid confusion, the halves should be read as 15-bit values.

This patch implements all three changes. It fixes the PLL detection
failure on my PowerMac, and doesn't cause any regressions on an x86
with an identical card.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_pdc2027x.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 69a5aa4949f..e3245b36269 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -563,13 +563,13 @@ static long pdc_read_counter(struct ata_host *host)
 	u32 bccrl, bccrh, bccrlv, bccrhv;
 
 retry:
-	bccrl = readl(mmio_base + PDC_BYTE_COUNT) & 0xffff;
-	bccrh = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0xffff;
+	bccrl = readl(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
+	bccrh = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
 	rmb();
 
 	/* Read the counter values again for verification */
-	bccrlv = readl(mmio_base + PDC_BYTE_COUNT) & 0xffff;
-	bccrhv = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0xffff;
+	bccrlv = readl(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
+	bccrhv = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
 	rmb();
 
 	counter = (bccrh << 15) | bccrl;
@@ -692,16 +692,16 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
 	struct timeval start_time, end_time;
 	long pll_clock, usec_elapsed;
 
-	/* Read current counter value */
-	start_count = pdc_read_counter(host);
-	do_gettimeofday(&start_time);
-
 	/* Start the test mode */
 	scr = readl(mmio_base + PDC_SYS_CTL);
 	PDPRINTK("scr[%X]\n", scr);
 	writel(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL);
 	readl(mmio_base + PDC_SYS_CTL); /* flush */
 
+	/* Read current counter value */
+	start_count = pdc_read_counter(host);
+	do_gettimeofday(&start_time);
+
 	/* Let the counter run for 100 ms. */
 	mdelay(100);
 
@@ -719,7 +719,7 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
 	usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
 		(end_time.tv_usec - start_time.tv_usec);
 
-	pll_clock = (start_count - end_count) / 100 *
+	pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 *
 		(100000000 / usec_elapsed);
 
 	PDPRINTK("start[%ld] end[%ld] \n", start_count, end_count);
-- 
cgit v1.2.3-70-g09d2


From 4f2d47cfddc84969b6934893fc40132750ae3b5e Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 22 Aug 2007 22:56:43 +0100
Subject: pata_sis: Add the FSC Amilo and friends

More short cables

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_sis.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 66bd0e83ac0..2bd7645f1a8 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -54,6 +54,7 @@ struct sis_laptop {
 static const struct sis_laptop sis_laptop[] = {
 	/* devid, subvendor, subdev */
 	{ 0x5513, 0x1043, 0x1107 },	/* ASUS A6K */
+	{ 0x5513, 0x1734, 0x105F },	/* FSC Amilo A1630 */
 	/* end marker */
 	{ 0, }
 };
-- 
cgit v1.2.3-70-g09d2


From 9edbdbea003b8be96e2f5d70515227d5fb32ad72 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 22 Aug 2007 22:57:48 +0100
Subject: pata_via: Add Arima W730-K8 and other rebadgings

More cable funnies

Signed-off-by: Alan Cox <alan@redhat.com>
Tested-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_via.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index f645fe22cd1..ea18e33f50e 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -63,7 +63,7 @@
 #include <linux/dmi.h>
 
 #define DRV_NAME "pata_via"
-#define DRV_VERSION "0.3.1"
+#define DRV_VERSION "0.3.2"
 
 /*
  *	The following comes directly from Vojtech Pavlik's ide/pci/via82cxxx
@@ -144,6 +144,9 @@ static int via_cable_override(struct pci_dev *pdev)
 	/* Systems by DMI */
 	if (dmi_check_system(cable_dmi_table))
 		return 1;
+	/* Arima W730-K8/Targa Visionary 811/... */
+	if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032)
+		return 1;
 	return 0;
 }
 
-- 
cgit v1.2.3-70-g09d2


From b54eebd673861136291b97e409a0f248b96e74ae Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 17 Aug 2007 18:46:51 +0900
Subject: libata: don't check n_sectors during revalidation if zero

If the initial configuration fails early, n_sectors is left at zero.
Checking against it during revalidation makes retried configuration
fail due to n_sectors mismatch.  Ignore zero n_sectors during
revalidation.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 9bfe329fb57..2ad4dda6d4a 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3700,7 +3700,8 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
 		goto fail;
 
 	/* verify n_sectors hasn't changed */
-	if (dev->class == ATA_DEV_ATA && dev->n_sectors != n_sectors) {
+	if (dev->class == ATA_DEV_ATA && n_sectors &&
+	    dev->n_sectors != n_sectors) {
 		ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
 			       "%llu != %llu\n",
 			       (unsigned long long)n_sectors,
-- 
cgit v1.2.3-70-g09d2


From 604de6e0ee3517d7f66427c8fc782761e057f025 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 23 Aug 2007 20:18:55 +0100
Subject: pata_it821x: Fix regression/corruptor

Whoever did the PCI revision patch slipped up on the it821x, and I
didn't spot this at the time either.  They moved the check for the
errata from the 0x10 revision to 0x11.  Put it back

This one is important for 2.6.23 final as in some cases bad things will
occur if 0x10 revision boards don't get the fixups.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/ata/pata_it821x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 430673be1df..7225124d96c 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -587,7 +587,7 @@ static int it821x_port_start(struct ata_port *ap)
 	itdev->want[1][1] = ATA_ANY;
 	itdev->last_device = -1;
 
-	if (pdev->revision == 0x11) {
+	if (pdev->revision == 0x10) {
 		itdev->timing10 = 1;
 		/* Need to disable ATAPI DMA for this case */
 		if (!itdev->smart)
-- 
cgit v1.2.3-70-g09d2


From 18b2466c3050e23c98bb69bd3f35295ff8164851 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 8 Aug 2007 14:28:49 +0100
Subject: libata-core: Allow translation setting to fail

On some early drives (pre ATA1) this feature is not supported. If it
fails then we know the drive geometry is the hardware geometry and the
one we tried to set anyway so just carry on.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 2ad4dda6d4a..9cf46bf8c8d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3985,6 +3985,11 @@ static unsigned int ata_dev_init_params(struct ata_device *dev,
 	tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
 
 	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	/* A clean abort indicates an original or just out of spec drive
+	   and we should continue as we issue the setup based on the
+	   drive reported working geometry */
+	if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
+		err_mask = 0;
 
 	DPRINTK("EXIT, err_mask=%x\n", err_mask);
 	return err_mask;
-- 
cgit v1.2.3-70-g09d2


From c5cf0ffa71d32c03607d287b76483479afb0bcd3 Mon Sep 17 00:00:00 2001
From: Jason Gaston <jason.d.gaston@intel.com>
Date: Thu, 30 Aug 2007 21:36:56 -0700
Subject: ata_piix: IDE mode SATA patch for Intel Tolapai

Resend trying to remove 8-bit characters in the email.

This patch adds the Intel Tolapai IDE mode SATA controller DID's.

Signed-off-by:  Jason Gaston <jason.d.gaston@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 071d274afaa..127deb87a33 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -130,6 +130,7 @@ enum {
 	ich6m_sata_ahci		= 8,
 	ich8_sata_ahci		= 9,
 	piix_pata_mwdma		= 10,	/* PIIX3 MWDMA only */
+	tolapai_sata_ahci	= 11,
 
 	/* constants for mapping table */
 	P0			= 0,  /* port 0 */
@@ -253,6 +254,8 @@ static const struct pci_device_id piix_pci_tbl[] = {
 	{ 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
 	/* SATA Controller IDE (ICH9M) */
 	{ 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
+	/* SATA Controller IDE (Tolapai) */
+	{ 0x8086, 0x5028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, tolapai_sata_ahci },
 
 	{ }	/* terminate list */
 };
@@ -441,12 +444,25 @@ static const struct piix_map_db ich8_map_db = {
 	},
 };
 
+static const struct piix_map_db tolapai_map_db = {
+        .mask = 0x3,
+        .port_enable = 0x3,
+        .map = {
+                /* PM   PS   SM   SS       MAP */
+                {  P0,  NA,  P1,  NA }, /* 00b */
+                {  RV,  RV,  RV,  RV }, /* 01b */
+                {  RV,  RV,  RV,  RV }, /* 10b */
+                {  RV,  RV,  RV,  RV },
+        },
+};
+
 static const struct piix_map_db *piix_map_db_table[] = {
 	[ich5_sata]		= &ich5_map_db,
 	[ich6_sata]		= &ich6_map_db,
 	[ich6_sata_ahci]	= &ich6_map_db,
 	[ich6m_sata_ahci]	= &ich6m_map_db,
 	[ich8_sata_ahci]	= &ich8_map_db,
+	[tolapai_sata_ahci]	= &tolapai_map_db,
 };
 
 static struct ata_port_info piix_port_info[] = {
@@ -560,6 +576,17 @@ static struct ata_port_info piix_port_info[] = {
 		.mwdma_mask	= 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
 		.port_ops	= &piix_pata_ops,
 	},
+
+	/* tolapai_sata_ahci: 11: */
+	{
+		.sht		= &piix_sht,
+		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
+				  PIIX_FLAG_AHCI,
+		.pio_mask	= 0x1f,	/* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.udma_mask	= ATA_UDMA6,
+		.port_ops	= &piix_sata_ops,
+	},
 };
 
 static struct pci_bits piix_enable_bits[] = {
-- 
cgit v1.2.3-70-g09d2


From 3cc0b9d3baeb6103d87743e4737a4b6eda30d399 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sat, 25 Aug 2007 08:31:02 +0900
Subject: ata_piix: add Satellite U200 to broken suspend list

Satellite U200 also shares the problem.  Add it to the broken suspend
list.  Original patch from John Schember.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: John Schember <john@nachtimwald.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 127deb87a33..22752e46b34 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -934,6 +934,13 @@ static int piix_broken_suspend(void)
 				DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M7"),
 			},
 		},
+		{
+			.ident = "Satellite U200",
+			.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+				DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
+			},
+		},
 		{
 			.ident = "Satellite U205",
 			.matches = {
-- 
cgit v1.2.3-70-g09d2


From d36ee189f392ea89de85124a0b58477bb0f2e0a6 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 23 Aug 2007 20:19:55 +0100
Subject: pata_marvell: Add more identifiers

This replaces the patch which incorrectly removed the 6145

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_marvell.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
index 87594c04d3a..ae206f35f74 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -192,6 +192,8 @@ static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *i
 
 static const struct pci_device_id marvell_pci_tbl[] = {
 	{ PCI_DEVICE(0x11AB, 0x6101), },
+	{ PCI_DEVICE(0x11AB, 0x6121), },
+	{ PCI_DEVICE(0x11AB, 0x6123), },
 	{ PCI_DEVICE(0x11AB, 0x6145), },
 	{ }	/* terminate list */
 };
-- 
cgit v1.2.3-70-g09d2


From 7f9992a23190418592f0810900e4f91546ec41da Mon Sep 17 00:00:00 2001
From: Mikael Pettersson <mikpe@it.uu.se>
Date: Wed, 29 Aug 2007 10:25:37 +0200
Subject: sata_promise: FastTrack TX4200 is a second-generation chip

This patch corrects sata_promise to classify FastTrack TX4200
(DID 3515/3519) as a second-generation chip. Promise's partial-
source FT TX4200 driver confirms this classification.

Treating it as a first-generation chip causes several problems:
1. Detection failures. This is a recent regression triggered by
   the hotplug-enabling changes in 2.6.23-rc1.
2. Various "failed to resume link for reset" warnings.

This patch fixes <http://bugzilla.kernel.org/show_bug.cgi?id=8936>.

Thanks to Stephen Ziemba for reporting the bug and for testing the fix.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Tested-by: Stephen Ziemba <sziemba@ecn.purdue.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_promise.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index d39ebc23c4a..25698cf0dce 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -45,7 +45,7 @@
 #include "sata_promise.h"
 
 #define DRV_NAME	"sata_promise"
-#define DRV_VERSION	"2.09"
+#define DRV_VERSION	"2.10"
 
 enum {
 	PDC_MAX_PORTS		= 4,
@@ -328,8 +328,8 @@ static const struct pci_device_id pdc_ata_pci_tbl[] = {
 
 	{ PCI_VDEVICE(PROMISE, 0x3318), board_20319 },
 	{ PCI_VDEVICE(PROMISE, 0x3319), board_20319 },
-	{ PCI_VDEVICE(PROMISE, 0x3515), board_20319 },
-	{ PCI_VDEVICE(PROMISE, 0x3519), board_20319 },
+	{ PCI_VDEVICE(PROMISE, 0x3515), board_40518 },
+	{ PCI_VDEVICE(PROMISE, 0x3519), board_40518 },
 	{ PCI_VDEVICE(PROMISE, 0x3d17), board_40518 },
 	{ PCI_VDEVICE(PROMISE, 0x3d18), board_40518 },
 
-- 
cgit v1.2.3-70-g09d2


From 16c55b038033d8f6f7601996dfae44399666d9ab Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Wed, 29 Aug 2007 11:58:33 +0900
Subject: libata: implement BROKEN_HPA horkage and apply it to affected drives

Some drives choke on READ_NATIVE_MAX_ADDRESS[_EXT].  Implement
ATA_HORKAGE_BROKEN_HPA and apply it to affected drives.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 11 ++++++++---
 include/linux/libata.h    |  1 +
 2 files changed, 9 insertions(+), 3 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 9cf46bf8c8d..a3ee087223d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1911,8 +1911,9 @@ int ata_dev_configure(struct ata_device *dev)
 					dev->flags |= ATA_DFLAG_FLUSH_EXT;
 			}
 
-			if (ata_id_hpa_enabled(dev->id))
-				dev->n_sectors = ata_hpa_resize(dev);
+			if (!(dev->horkage & ATA_HORKAGE_BROKEN_HPA) &&
+			    ata_id_hpa_enabled(dev->id))
+ 				dev->n_sectors = ata_hpa_resize(dev);
 
 			/* config NCQ */
 			ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
@@ -3795,7 +3796,11 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "ST9160821AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
 	{ "SAMSUNG HD401LJ",	"ZZ100-15",	ATA_HORKAGE_NONCQ, },
 
-	/* Devices with NCQ limits */
+	/* devices which puke on READ_NATIVE_MAX */
+	{ "HDS724040KLSA80",	"KFAOA20N",	ATA_HORKAGE_BROKEN_HPA, },
+	{ "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
+	{ "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
+	{ "MAXTOR 6L080L4",	"A93.0500",	ATA_HORKAGE_BROKEN_HPA },
 
 	/* End Marker */
 	{ }
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 41978a55731..a67bb9075e9 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -303,6 +303,7 @@ enum {
 	ATA_HORKAGE_NODMA	= (1 << 1),	/* DMA problems */
 	ATA_HORKAGE_NONCQ	= (1 << 2),	/* Don't use NCQ */
 	ATA_HORKAGE_MAX_SEC_128	= (1 << 3),	/* Limit max sects to 128 */
+	ATA_HORKAGE_BROKEN_HPA	= (1 << 4),	/* Broken HPA */
 };
 
 enum hsm_task_states {
-- 
cgit v1.2.3-70-g09d2


From 43a98f05d99205687ddf74089e79a8312c8c5f90 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Thu, 23 Aug 2007 10:15:18 +0900
Subject: ata_piix: implement IOCFG bit18 quirk

Some notebooks need bit18 of IOCFG to be cleared for the drive bay to
work even though the bit is NOOP according to the datasheet.  This
patch implement IOCFG bit18 quirk and apply it to Clevo M570U.

  http://bugzilla.kernel.org/show_bug.cgi?id=8051

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: D. Angelis <dangelis@beta-cae.gr>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 22752e46b34..0ff96a06374 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1173,6 +1173,39 @@ static void __devinit piix_init_sata_map(struct pci_dev *pdev,
 	hpriv->map = map;
 }
 
+static void piix_iocfg_bit18_quirk(struct pci_dev *pdev)
+{
+	static struct dmi_system_id sysids[] = {
+		{
+			/* Clevo M570U sets IOCFG bit 18 if the cdrom
+			 * isn't used to boot the system which
+			 * disables the channel.
+			 */
+			.ident = "M570U",
+			.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "Clevo Co."),
+				DMI_MATCH(DMI_PRODUCT_NAME, "M570U"),
+			},
+		},
+	};
+	u32 iocfg;
+
+	if (!dmi_check_system(sysids))
+		return;
+
+	/* The datasheet says that bit 18 is NOOP but certain systems
+	 * seem to use it to disable a channel.  Clear the bit on the
+	 * affected systems.
+	 */
+	pci_read_config_dword(pdev, PIIX_IOCFG, &iocfg);
+	if (iocfg & (1 << 18)) {
+		dev_printk(KERN_INFO, &pdev->dev,
+			   "applying IOCFG bit18 quirk\n");
+		iocfg &= ~(1 << 18);
+		pci_write_config_dword(pdev, PIIX_IOCFG, iocfg);
+	}
+}
+
 /**
  *	piix_init_one - Register PIIX ATA PCI device with kernel services
  *	@pdev: PCI device to register
@@ -1234,6 +1267,9 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 			      piix_map_db_table[ent->driver_data]);
 	}
 
+	/* apply IOCFG bit18 quirk */
+	piix_iocfg_bit18_quirk(pdev);
+
 	/* On ICH5, some BIOSen disable the interrupt using the
 	 * PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
 	 * On ICH6, this bit has the same effect, but only when
-- 
cgit v1.2.3-70-g09d2


From 2a3103ce4357a09c2289405f969acec0edf4398f Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 31 Aug 2007 04:54:06 -0400
Subject: [libata] Bump driver versions

Bump the versions for drivers that were modified, but had not already
had a version number bump.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_generic.c      | 2 +-
 drivers/ata/ata_piix.c         | 2 +-
 drivers/ata/pata_ali.c         | 2 +-
 drivers/ata/pata_amd.c         | 2 +-
 drivers/ata/pata_atiixp.c      | 2 +-
 drivers/ata/pata_cs5520.c      | 2 +-
 drivers/ata/pata_cs5530.c      | 2 +-
 drivers/ata/pata_isapnp.c      | 2 +-
 drivers/ata/pata_it821x.c      | 2 +-
 drivers/ata/pata_mpc52xx.c     | 2 +-
 drivers/ata/pata_pcmcia.c      | 2 +-
 drivers/ata/pata_pdc2027x.c    | 2 +-
 drivers/ata/pata_platform.c    | 2 +-
 drivers/ata/pata_sc1200.c      | 2 +-
 drivers/ata/pata_scc.c         | 2 +-
 drivers/ata/pata_serverworks.c | 2 +-
 drivers/ata/pata_sil680.c      | 2 +-
 drivers/ata/pata_sl82c105.c    | 2 +-
 drivers/ata/pdc_adma.c         | 2 +-
 drivers/ata/sata_inic162x.c    | 2 +-
 drivers/ata/sata_mv.c          | 2 +-
 drivers/ata/sata_nv.c          | 2 +-
 drivers/ata/sata_qstor.c       | 2 +-
 drivers/ata/sata_sil.c         | 2 +-
 drivers/ata/sata_sil24.c       | 2 +-
 drivers/ata/sata_sis.c         | 2 +-
 drivers/ata/sata_svw.c         | 2 +-
 drivers/ata/sata_sx4.c         | 2 +-
 drivers/ata/sata_uli.c         | 2 +-
 drivers/ata/sata_via.c         | 2 +-
 drivers/ata/sata_vsc.c         | 2 +-
 31 files changed, 31 insertions(+), 31 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 430fcf4f9ef..94546695472 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -26,7 +26,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "ata_generic"
-#define DRV_VERSION "0.2.12"
+#define DRV_VERSION "0.2.13"
 
 /*
  *	A generic parallel ATA driver using libata
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 0ff96a06374..e40c94f5f59 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -94,7 +94,7 @@
 #include <linux/dmi.h>
 
 #define DRV_NAME	"ata_piix"
-#define DRV_VERSION	"2.11"
+#define DRV_VERSION	"2.12"
 
 enum {
 	PIIX_IOCFG		= 0x54, /* IDE I/O configuration register */
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index e8a28e94fe4..94e5edc12ac 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -34,7 +34,7 @@
 #include <linux/dmi.h>
 
 #define DRV_NAME "pata_ali"
-#define DRV_VERSION "0.7.4"
+#define DRV_VERSION "0.7.5"
 
 /*
  *	Cable special cases
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index b09facad63e..04048fcf630 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -25,7 +25,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_amd"
-#define DRV_VERSION "0.3.8"
+#define DRV_VERSION "0.3.9"
 
 /**
  *	timing_setup		-	shared timing computation and load
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index 80509be49e7..86f85a2cab7 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -22,7 +22,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_atiixp"
-#define DRV_VERSION "0.4.5"
+#define DRV_VERSION "0.4.6"
 
 enum {
 	ATIIXP_IDE_PIO_TIMING	= 0x40,
diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index 7dc76e71bd5..e2459088cdc 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -41,7 +41,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_cs5520"
-#define DRV_VERSION	"0.6.5"
+#define DRV_VERSION	"0.6.6"
 
 struct pio_clocks
 {
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index 68f150a1e2f..c6066aa43ec 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -35,7 +35,7 @@
 #include <linux/dmi.h>
 
 #define DRV_NAME	"pata_cs5530"
-#define DRV_VERSION	"0.7.3"
+#define DRV_VERSION	"0.7.4"
 
 static void __iomem *cs5530_port_base(struct ata_port *ap)
 {
diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
index 91a396fa5b2..9e553c54203 100644
--- a/drivers/ata/pata_isapnp.c
+++ b/drivers/ata/pata_isapnp.c
@@ -17,7 +17,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_isapnp"
-#define DRV_VERSION "0.2.1"
+#define DRV_VERSION "0.2.2"
 
 static struct scsi_host_template isapnp_sht = {
 	.module			= THIS_MODULE,
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 7225124d96c..ed637ae33ec 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -80,7 +80,7 @@
 
 
 #define DRV_NAME "pata_it821x"
-#define DRV_VERSION "0.3.7"
+#define DRV_VERSION "0.3.8"
 
 struct it821x_dev
 {
diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c
index 182e83c9047..099f4cdc4cd 100644
--- a/drivers/ata/pata_mpc52xx.c
+++ b/drivers/ata/pata_mpc52xx.c
@@ -24,7 +24,7 @@
 
 
 #define DRV_NAME	"mpc52xx_ata"
-#define DRV_VERSION	"0.1.0ac2"
+#define DRV_VERSION	"0.1.2"
 
 
 /* Private structures used by the driver */
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index 6da23feed03..0f2b027624d 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -42,7 +42,7 @@
 
 
 #define DRV_NAME "pata_pcmcia"
-#define DRV_VERSION "0.3.1"
+#define DRV_VERSION "0.3.2"
 
 /*
  *	Private data structure to glue stuff together
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index e3245b36269..bb64a986e8f 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -35,7 +35,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_pdc2027x"
-#define DRV_VERSION	"0.9"
+#define DRV_VERSION	"1.0"
 #undef PDC_DEBUG
 
 #ifdef PDC_DEBUG
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index a909f793ffc..5086d03f2d7 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -22,7 +22,7 @@
 #include <linux/pata_platform.h>
 
 #define DRV_NAME "pata_platform"
-#define DRV_VERSION "1.0"
+#define DRV_VERSION "1.1"
 
 static int pio_mask = 1;
 
diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c
index b8b2d11e418..5edf67b1f3b 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -40,7 +40,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sc1200"
-#define DRV_VERSION	"0.2.5"
+#define DRV_VERSION	"0.2.6"
 
 #define SC1200_REV_A	0x00
 #define SC1200_REV_B1	0x01
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index 36cdbd2b0bd..2d048ef25a5 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -43,7 +43,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME		"pata_scc"
-#define DRV_VERSION		"0.2"
+#define DRV_VERSION		"0.3"
 
 #define PCI_DEVICE_ID_TOSHIBA_SCC_ATA		0x01b4
 
diff --git a/drivers/ata/pata_serverworks.c b/drivers/ata/pata_serverworks.c
index 89691541fe5..0faf99c8f13 100644
--- a/drivers/ata/pata_serverworks.c
+++ b/drivers/ata/pata_serverworks.c
@@ -41,7 +41,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_serverworks"
-#define DRV_VERSION "0.4.1"
+#define DRV_VERSION "0.4.2"
 
 #define SVWKS_CSB5_REVISION_NEW	0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
 #define SVWKS_CSB6_REVISION	0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index b0cd52d6e3f..40395804a66 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -33,7 +33,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_sil680"
-#define DRV_VERSION "0.4.6"
+#define DRV_VERSION "0.4.7"
 
 #define SIL680_MMIO_BAR		5
 
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index 8c2813aa6cd..c0f43bb2595 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -26,7 +26,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_sl82c105"
-#define DRV_VERSION "0.3.1"
+#define DRV_VERSION "0.3.2"
 
 enum {
 	/*
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index bec1de594de..5c79271401a 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -44,7 +44,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pdc_adma"
-#define DRV_VERSION	"0.06"
+#define DRV_VERSION	"1.0"
 
 /* macro to calculate base address for ATA regs */
 #define ADMA_ATA_REGS(base,port_no)	((base) + ((port_no) * 0x40))
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index a9c948d7604..fdbed8ecdfc 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -28,7 +28,7 @@
 #include <scsi/scsi_device.h>
 
 #define DRV_NAME	"sata_inic162x"
-#define DRV_VERSION	"0.2"
+#define DRV_VERSION	"0.3"
 
 enum {
 	MMIO_BAR		= 5,
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 3acf65e75eb..11bf6c7ac12 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -72,7 +72,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_mv"
-#define DRV_VERSION	"0.81"
+#define DRV_VERSION	"1.0"
 
 enum {
 	/* BAR's are enumerated in terms of pci_resource_start() terms */
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 0b58c4df6fd..40dc7313985 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -49,7 +49,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME			"sata_nv"
-#define DRV_VERSION			"3.4"
+#define DRV_VERSION			"3.5"
 
 #define NV_ADMA_DMA_BOUNDARY		0xffffffffUL
 
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index c8f9242e7f4..5e1dfdda698 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -39,7 +39,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_qstor"
-#define DRV_VERSION	"0.08"
+#define DRV_VERSION	"0.09"
 
 enum {
 	QS_MMIO_BAR		= 4,
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index db676375895..8c72e714b45 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -46,7 +46,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_sil"
-#define DRV_VERSION	"2.2"
+#define DRV_VERSION	"2.3"
 
 enum {
 	SIL_MMIO_BAR		= 5,
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 46fbbe7f121..ef83e6b1e31 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -30,7 +30,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_sil24"
-#define DRV_VERSION	"0.9"
+#define DRV_VERSION	"1.0"
 
 /*
  * Port request block (PRB) 32 bytes
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index 31a2f55aae6..41c1d6e8f1f 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -43,7 +43,7 @@
 #include "sis.h"
 
 #define DRV_NAME	"sata_sis"
-#define DRV_VERSION	"0.8"
+#define DRV_VERSION	"1.0"
 
 enum {
 	sis_180			= 0,
diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index 92e87707503..d9678e7bc3a 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -53,7 +53,7 @@
 #endif /* CONFIG_PPC_OF */
 
 #define DRV_NAME	"sata_svw"
-#define DRV_VERSION	"2.2"
+#define DRV_VERSION	"2.3"
 
 enum {
 	/* ap->flags bits */
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 5193bd8647b..97aefdd87be 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -92,7 +92,7 @@
 #include "sata_promise.h"
 
 #define DRV_NAME	"sata_sx4"
-#define DRV_VERSION	"0.11"
+#define DRV_VERSION	"0.12"
 
 
 enum {
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index 78c28512f01..e6b8b45279a 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -36,7 +36,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_uli"
-#define DRV_VERSION	"1.2"
+#define DRV_VERSION	"1.3"
 
 enum {
 	uli_5289		= 0,
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 86b7bfc1732..a4e631766ee 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -46,7 +46,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_via"
-#define DRV_VERSION	"2.2"
+#define DRV_VERSION	"2.3"
 
 enum board_ids_enum {
 	vt6420,
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index 24344d0d057..1920915dfa2 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -47,7 +47,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_vsc"
-#define DRV_VERSION	"2.2"
+#define DRV_VERSION	"2.3"
 
 enum {
 	VSC_MMIO_BAR			= 0,
-- 
cgit v1.2.3-70-g09d2


From 7d05154840db52201d8e719fd0f091b8381e362f Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Sat, 1 Sep 2007 06:48:52 -0400
Subject: [libata] ata_piix: properly terminate DMI system list

If you don't terminate a list, bad things happen...

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index e40c94f5f59..3b8bf1812dc 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -955,7 +955,8 @@ static int piix_broken_suspend(void)
 				DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
 			},
 		},
-		{ }
+
+		{ }	/* terminate list */
 	};
 	static const char *oemstrs[] = {
 		"Tecra M3,",
@@ -1187,6 +1188,8 @@ static void piix_iocfg_bit18_quirk(struct pci_dev *pdev)
 				DMI_MATCH(DMI_PRODUCT_NAME, "M570U"),
 			},
 		},
+
+		{ }	/* terminate list */
 	};
 	u32 iocfg;
 
-- 
cgit v1.2.3-70-g09d2


From b4154d4a01c6cc98b97dc239ca4302316c8f98da Mon Sep 17 00:00:00 2001
From: Ondrej Zary <linux@rainbow-software.org>
Date: Sat, 1 Sep 2007 00:55:21 +0200
Subject: Fix sata_via write errors on PATA drive connected to VT6421

I think that I've found and fixed the problem. There is a copy/paste bug in
vt6421_set_dma_mode() function which causes wrong values to be written to
PATA_UDMA_TIMING register.

This patch fixes a copy/paste bug that breaks DMA modes on VT6421 PATA port.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_via.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index a4e631766ee..57fd30de8f0 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -371,7 +371,7 @@ static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
-	pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->pio_mode - XFER_UDMA_0]);
+	pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->dma_mode - XFER_UDMA_0]);
 }
 
 static const unsigned int svia_bar_sizes[] = {
-- 
cgit v1.2.3-70-g09d2


From 08ebd43d6b9b63de681b8f255c0fabae8033527c Mon Sep 17 00:00:00 2001
From: Laurent Riffard <laurent.riffard@free.fr>
Date: Sun, 2 Sep 2007 21:01:32 +0200
Subject: Fix broken pata_via cable detection

via_do_set_mode overwrites 80-wire cable detection bits. Let's
preserve them.

Signed-off-by: Laurent Riffard <laurent.riffard@free.fr>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_via.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index ea18e33f50e..1b0acafad1a 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -243,7 +243,6 @@ static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mo
 	int ut;
 	int offset = 3 - (2*ap->port_no) - adev->devno;
 
-
 	/* Calculate the timing values we require */
 	ata_timing_compute(adev, mode, &t, T, UT);
 
@@ -290,9 +289,17 @@ static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mo
 			ut = t.udma ? (0xe0 | (FIT(t.udma, 2, 9) - 2)) : 0x07;
 			break;
 	}
+
 	/* Set UDMA unless device is not UDMA capable */
-	if (udma_type)
-		pci_write_config_byte(pdev, 0x50 + offset, ut);
+	if (udma_type) {
+		u8 cable80_status;
+
+		/* Get 80-wire cable detection bit */
+		pci_read_config_byte(pdev, 0x50 + offset, &cable80_status);
+		cable80_status &= 0x10;
+
+		pci_write_config_byte(pdev, 0x50 + offset, ut | cable80_status);
+	}
 }
 
 static void via_set_piomode(struct ata_port *ap, struct ata_device *adev)
-- 
cgit v1.2.3-70-g09d2


From bce7d5e0e1fc0c1f1251b7f21a19cb48207408b6 Mon Sep 17 00:00:00 2001
From: Jeff Norden <jnorden@math.tntech.edu>
Date: Tue, 4 Sep 2007 11:07:20 -0500
Subject: pata_it821x: fix lost interrupt with atapi devices

Fix "lost" interrupt problem when using dma with CD/DVD drives in some
configurations.  This problem can make installing linux from media
impossible for distro's that have switched to libata-only configurations.

The simple fix is to eliminate the use of dma for reading drive status, etc,
by checking the number of bytes to transferred.

This change will only affect the behavior of atapi devices, not disks.
There is more info at http://bugzilla.redhat.com/show_bug.cgi?id=242229
This patch is for 2.6.22.1

Signed-off-by: Jeff Norden <jnorden@math.tntech.edu>
Reviewed-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_it821x.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index ed637ae33ec..5d8b91e70ec 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -533,6 +533,10 @@ static int it821x_check_atapi_dma(struct ata_queued_cmd *qc)
 	struct ata_port *ap = qc->ap;
 	struct it821x_dev *itdev = ap->private_data;
 
+	/* Only use dma for transfers to/from the media. */
+	if (qc->nbytes < 2048)
+		return -EOPNOTSUPP;
+
 	/* No ATAPI DMA in smart mode */
 	if (itdev->smart)
 		return -EOPNOTSUPP;
-- 
cgit v1.2.3-70-g09d2


From b311ec4ae82b1dc337689e966dcf9c5f6a53877e Mon Sep 17 00:00:00 2001
From: Joseph Chan <josephchan@via.com.tw>
Date: Mon, 10 Sep 2007 22:06:01 -0400
Subject: [libata, IDE] add new VIA bridge to VIA PATA drivers

Signed-off-by: Joseph Chan <josephchan@via.com.tw>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_via.c      | 1 +
 drivers/ide/pci/via82cxxx.c | 1 +
 include/linux/pci_ids.h     | 1 +
 3 files changed, 3 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 1b0acafad1a..636c4f1a0b2 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -97,6 +97,7 @@ static const struct via_isa_bridge {
 	u8 rev_max;
 	u16 flags;
 } via_isa_bridges[] = {
+	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
 	{ "vt8237s",	PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
 	{ "vt8251",	PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
 	{ "cx700",	PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, VIA_UDMA_133 | VIA_BAD_AST },
diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
index 581316f9581..8c539381d62 100644
--- a/drivers/ide/pci/via82cxxx.c
+++ b/drivers/ide/pci/via82cxxx.c
@@ -74,6 +74,7 @@ static struct via_isa_bridge {
 	u8 udma_mask;
 	u8 flags;
 } via_isa_bridges[] = {
+	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 	{ "cx700",	PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 	{ "vt8237s",	PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
 	{ "vt6410",	PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 17168f3cc73..d41747b9fd1 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1343,6 +1343,7 @@
 #define PCI_DEVICE_ID_VIA_8231_4	0x8235
 #define PCI_DEVICE_ID_VIA_8365_1	0x8305
 #define PCI_DEVICE_ID_VIA_CX700		0x8324
+#define PCI_DEVICE_ID_VIA_VX800		0x8353
 #define PCI_DEVICE_ID_VIA_8371_1	0x8391
 #define PCI_DEVICE_ID_VIA_82C598_1	0x8598
 #define PCI_DEVICE_ID_VIA_838X_1	0xB188
-- 
cgit v1.2.3-70-g09d2


From 3dcc323fe8d7158bd662c04d41ba8b25fa3ce27b Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 3 Sep 2007 12:20:11 +0900
Subject: libata clear horkage on ata_dev_init()

dev->horkage should be cleared over device hotunplug/plug.  Clear it
in ata_dev_init().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index a3ee087223d..c43de9a710d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6035,6 +6035,7 @@ void ata_dev_init(struct ata_device *dev)
 	 */
 	spin_lock_irqsave(ap->lock, flags);
 	dev->flags &= ~ATA_DFLAG_INIT_MASK;
+	dev->horkage = 0;
 	spin_unlock_irqrestore(ap->lock, flags);
 
 	memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
-- 
cgit v1.2.3-70-g09d2


From 03e6f489b32c0e7877bfe48f5619db725edf1fea Mon Sep 17 00:00:00 2001
From: Daniel Exner <dex@dragonslave.de>
Date: Tue, 11 Sep 2007 22:28:36 +0200
Subject: pata_ali/alim15x3: override 80-wire cable detection for Toshiba
 S1800-814

Add Toshiba S1800-814 to whitelist for both pata_ali and alim15x3,
as it is correctly detected as 40-wire connected but this cable is
short enough to still use transfer modes higher than UDMA33.

Signed-off-by: Daniel Exner <dex@dragonslave.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ata/pata_ali.c     | 7 +++++++
 drivers/ide/pci/alim15x3.c | 7 +++++++
 2 files changed, 14 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 94e5edc12ac..71bdc3b3189 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -48,6 +48,13 @@ static struct dmi_system_id cable_dmi_table[] = {
 			DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
 		},
 	},
+	{
+		.ident = "Toshiba Satelite S1800-814",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
+		},
+	},
 	{ }
 };
 
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index 025689de50e..11ecb618007 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -596,6 +596,13 @@ static struct dmi_system_id cable_dmi_table[] = {
 			DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
 		},
 	},
+	{
+		.ident = "Toshiba Satellite S1800-814",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
+		},
+	},
 	{ }
 };
 
-- 
cgit v1.2.3-70-g09d2


From 0e3dbc01d53940fe10e5a5cfec15ede3e929c918 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 20 Sep 2007 15:22:47 +0100
Subject: libata: Update the blacklist with a few more devices

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c43de9a710d..772be09b468 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3778,6 +3778,9 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "Maxtor 6L250S0",     "BANC1G10",     ATA_HORKAGE_NONCQ },
 	{ "Maxtor 6B200M0",	"BANC1BM0",	ATA_HORKAGE_NONCQ },
 	{ "Maxtor 6B200M0",	"BANC1B10",	ATA_HORKAGE_NONCQ },
+	{ "Maxtor 7B250S0",	"BANC1B70",	ATA_HORKAGE_NONCQ, },
+	{ "Maxtor 7B300S0",	"BANC1B70",	ATA_HORKAGE_NONCQ },
+	{ "Maxtor 7V300F0",	"VA111630",	ATA_HORKAGE_NONCQ },
 	{ "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
 	 ATA_HORKAGE_NONCQ },
 	/* NCQ hard hangs device under heavier load, needs hard power cycle */
@@ -3794,6 +3797,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "WDC WD740ADFD-00NLR1", NULL,		ATA_HORKAGE_NONCQ, },
 	{ "FUJITSU MHV2080BH",	"00840028",	ATA_HORKAGE_NONCQ, },
 	{ "ST9160821AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
+	{ "ST3160812AS",	"3.AD",		ATA_HORKAGE_NONCQ, },
 	{ "SAMSUNG HD401LJ",	"ZZ100-15",	ATA_HORKAGE_NONCQ, },
 
 	/* devices which puke on READ_NATIVE_MAX */
-- 
cgit v1.2.3-70-g09d2


From e1cc9de8361f267101402a1181cff4d3d3225a6d Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 20 Sep 2007 15:03:07 +0100
Subject: libata-sff: Fix documentation

Code moved to ioread/iowrite but the comment didn't
Also note a posting issue

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-sff.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 1cce2198baa..8023167bbbe 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -297,7 +297,7 @@ void ata_bmdma_start (struct ata_queued_cmd *qc)
 	dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
 	iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
 
-	/* Strictly, one may wish to issue a readb() here, to
+	/* Strictly, one may wish to issue an ioread8() here, to
 	 * flush the mmio write.  However, control also passes
 	 * to the hardware at this point, and it will interrupt
 	 * us when we are to resume control.  So, in effect,
@@ -307,6 +307,9 @@ void ata_bmdma_start (struct ata_queued_cmd *qc)
 	 * is expected, so I think it is best to not add a readb()
 	 * without first all the MMIO ATA cards/mobos.
 	 * Or maybe I'm just being paranoid.
+	 *
+	 * FIXME: The posting of this write means I/O starts are
+	 * unneccessarily delayed for MMIO
 	 */
 }
 
-- 
cgit v1.2.3-70-g09d2


From c69c0892d8dd68b01a9fced5cab8527f0698c15e Mon Sep 17 00:00:00 2001
From: henry su <henry.su.ati@gmail.com>
Date: Thu, 20 Sep 2007 16:07:33 -0400
Subject: [libata] ahci: add ATI SB800 PCI IDs

ATI/AMD SB800 shares some device IDs with SB700,
and SB800 adds two more device IDs:0x4394,0x4395.

Signed-off-by: henry su <henry.su.ati@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 06f212ff2b4..c16820325d7 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -418,10 +418,12 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 
 	/* ATI */
 	{ PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
-	{ PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700 IDE */
-	{ PCI_VDEVICE(ATI, 0x4391), board_ahci_sb600 }, /* ATI SB700 AHCI */
-	{ PCI_VDEVICE(ATI, 0x4392), board_ahci_sb600 }, /* ATI SB700 nraid5 */
-	{ PCI_VDEVICE(ATI, 0x4393), board_ahci_sb600 }, /* ATI SB700 raid5 */
+	{ PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4391), board_ahci_sb600 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4392), board_ahci_sb600 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4393), board_ahci_sb600 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4394), board_ahci_sb600 }, /* ATI SB700/800 */
+	{ PCI_VDEVICE(ATI, 0x4395), board_ahci_sb600 }, /* ATI SB700/800 */
 
 	/* VIA */
 	{ PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
-- 
cgit v1.2.3-70-g09d2


From 228f47b959a0cf2e24c9696757c7e6510334e499 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 12:37:05 +0900
Subject: sata_sil24: fix IRQ clearing race when PCIX_IRQ_WOC is used

When PCIX_IRQ_WOC is used, sil24 has an inherent race condition
between clearing IRQ pending and reading IRQ status.  If IRQ pending
is cleared after reading IRQ status, there's possibility of lost IRQ.
If IRQ pending is cleared before reading IRQ status, spurious IRQs
will occur.

sata_sil24 till now cleared IRQ pending after reading IRQ status thus
losing IRQs on machines where PCIX_IRQ_WOC was used.  Reverse the
order and ignore spurious IRQs if PCIX_IRQ_WOC.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_sil24.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index ef83e6b1e31..233e8869339 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -888,6 +888,16 @@ static inline void sil24_host_intr(struct ata_port *ap)
 	u32 slot_stat, qc_active;
 	int rc;
 
+	/* If PCIX_IRQ_WOC, there's an inherent race window between
+	 * clearing IRQ pending status and reading PORT_SLOT_STAT
+	 * which may cause spurious interrupts afterwards.  This is
+	 * unavoidable and much better than losing interrupts which
+	 * happens if IRQ pending is cleared after reading
+	 * PORT_SLOT_STAT.
+	 */
+	if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
+		writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
+
 	slot_stat = readl(port + PORT_SLOT_STAT);
 
 	if (unlikely(slot_stat & HOST_SSTAT_ATTN)) {
@@ -895,9 +905,6 @@ static inline void sil24_host_intr(struct ata_port *ap)
 		return;
 	}
 
-	if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
-		writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
-
 	qc_active = slot_stat & ~HOST_SSTAT_ATTN;
 	rc = ata_qc_complete_multiple(ap, qc_active, sil24_finish_qc);
 	if (rc > 0)
@@ -910,7 +917,8 @@ static inline void sil24_host_intr(struct ata_port *ap)
 		return;
 	}
 
-	if (ata_ratelimit())
+	/* spurious interrupts are expected if PCIX_IRQ_WOC */
+	if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit())
 		ata_port_printk(ap, KERN_INFO, "spurious interrupt "
 			"(slot_stat 0x%x active_tag %d sactive 0x%x)\n",
 			slot_stat, ap->active_tag, ap->sactive);
-- 
cgit v1.2.3-70-g09d2


From edeb614c1c8388b354d93ff7790317cc5d6a38ec Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 21 Sep 2007 16:29:05 +0900
Subject: pata_sis: add missing UDMA5 timing value in sis_66_set_dmamode()

sis_66_set_dmamode() also handles early UDMA100 (SIS630 ET) but is
missing udma timing value for UDMA100.  According to sis5513, this
should be 0x8000.  This caused UDMA100 device to fail on pata_sis till
it downgrades to UDMA66 while it works fine on sis5513 at UDMA100.

Reported by Adam Blech.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Adam Blech <desaster.area@addcom.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_sis.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 2bd7645f1a8..cce2834b2b6 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -375,8 +375,9 @@ static void sis_66_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	int drive_pci = sis_old_port_base(adev);
 	u16 timing;
 
+	/* MWDMA 0-2 and UDMA 0-5 */
 	const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
-	const u16 udma_bits[]  = { 0xF000, 0xD000, 0xB000, 0xA000, 0x9000};
+	const u16 udma_bits[]  = { 0xF000, 0xD000, 0xB000, 0xA000, 0x9000, 0x8000 };
 
 	pci_read_config_word(pdev, drive_pci, &timing);
 
-- 
cgit v1.2.3-70-g09d2


From 4c74d4ec3524a8f31deadd115139dd93bc91d598 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 30 Sep 2007 01:11:20 -0700
Subject: ata_piix: add another TECRA M3 entry to broken suspend list

There's a different version of DMI table for TECRA M3 where it has
proper vendor and product name entry.  Add the entry to the broken
suspend list.

Angus Turnbull reported and provided initial patch.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Angus Turnbull <angus@twinhelix.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 3b8bf1812dc..6996eb5b750 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -920,6 +920,13 @@ static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 static int piix_broken_suspend(void)
 {
 	static struct dmi_system_id sysids[] = {
+		{
+			.ident = "TECRA M3",
+			.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+				DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M3"),
+			},
+		},
 		{
 			.ident = "TECRA M5",
 			.matches = {
-- 
cgit v1.2.3-70-g09d2


From 4007b493ee6e4a52c2b618ab8361847fba5bf116 Mon Sep 17 00:00:00 2001
From: Olof Johansson <olof@lixom.net>
Date: Tue, 2 Oct 2007 20:45:27 -0500
Subject: libata: fix for sata_mv >64KB DMA segments

Fix bug in sata_mv for cases where the IOMMU layer has merged SG entries
to larger than 64KB. They need to be split up before being sent to
the driver.

Just for simplicity's sake, split up at 64K boundary instead of 64K size,
since that's what the common code does anyway.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_mv.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 11bf6c7ac12..1a82e22b3ef 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1139,15 +1139,27 @@ static unsigned int mv_fill_sg(struct ata_queued_cmd *qc)
 		dma_addr_t addr = sg_dma_address(sg);
 		u32 sg_len = sg_dma_len(sg);
 
-		mv_sg->addr = cpu_to_le32(addr & 0xffffffff);
-		mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
-		mv_sg->flags_size = cpu_to_le32(sg_len & 0xffff);
+		while (sg_len) {
+			u32 offset = addr & 0xffff;
+			u32 len = sg_len;
 
-		if (ata_sg_is_last(sg, qc))
-			mv_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
+			if ((offset + sg_len > 0x10000))
+				len = 0x10000 - offset;
+
+			mv_sg->addr = cpu_to_le32(addr & 0xffffffff);
+			mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
+			mv_sg->flags_size = cpu_to_le32(len);
+
+			sg_len -= len;
+			addr += len;
+
+			if (!sg_len && ata_sg_is_last(sg, qc))
+				mv_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
+
+			mv_sg++;
+			n_sg++;
+		}
 
-		mv_sg++;
-		n_sg++;
 	}
 
 	return n_sg;
-- 
cgit v1.2.3-70-g09d2


From 90925d3050253ff7b4f5d1660071df75f44bd0ff Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jirislaby@gmail.com>
Date: Tue, 2 Oct 2007 13:53:01 -0700
Subject: Ata: pata_marvell, use ioread* for iomap-ped memory

pata_marvell, use ioread* for iomap-ped memory

read* on pci_iomapped memory is incorrect, fix it

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_marvell.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
index ae206f35f74..b45506f1ef7 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -44,10 +44,10 @@ static int marvell_pre_reset(struct ata_port *ap, unsigned long deadline)
 		return -ENOMEM;
 	printk("BAR5:");
 	for(i = 0; i <= 0x0F; i++)
-		printk("%02X:%02X ", i, readb(barp + i));
+		printk("%02X:%02X ", i, ioread8(barp + i));
 	printk("\n");
 
-	devices = readl(barp + 0x0C);
+	devices = ioread32(barp + 0x0C);
 	pci_iounmap(pdev, barp);
 
 	if ((pdev->device == 0x6145) && (ap->port_no == 0) &&
-- 
cgit v1.2.3-70-g09d2


From 991bf528f602882580d0918842b125255d246a19 Mon Sep 17 00:00:00 2001
From: Scott Thompson <postfailathushmaildotcom@yahoo.com>
Date: Tue, 2 Oct 2007 13:53:01 -0700
Subject: drivers/ata/pata_ixp4xx_cf.c: ioremap return code check

Add missing ioremap return checks.

Signed-off-by: Scott Thompson <postfail <at> hushmail.com>
Acked-by: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_ixp4xx_cf.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 4ca7fd6118d..5dea3584c6c 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -189,6 +189,9 @@ static __devinit int ixp4xx_pata_probe(struct platform_device *pdev)
 	data->cs0 = devm_ioremap(&pdev->dev, cs0->start, 0x1000);
 	data->cs1 = devm_ioremap(&pdev->dev, cs1->start, 0x1000);
 
+	if (!data->cs0 || !data->cs1)
+		return -ENOMEM;
+
 	irq = platform_get_irq(pdev, 0);
 	if (irq)
 		set_irq_type(irq, IRQT_RISING);
-- 
cgit v1.2.3-70-g09d2


From baf14aa14efcfdb5a74d5cf804691086c6bec743 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Tue, 9 Oct 2007 13:51:57 -0400
Subject: sata_mv: correct S/G table limits

The recent mv_fill_sg() rewrite, to fix a data corruption problem
related to IOMMU virtual merging, forgot to account for the
potentially-increased size of the scatter/gather table after its run.

Additionally, the DMA boundary is reduced from 0xffffffff to 0xffff
to more closely match the needs of mv_fill_sg().

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/ata/sata_mv.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 1a82e22b3ef..cb7dec97fee 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -313,7 +313,10 @@ enum {
 #define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE)
 
 enum {
-	MV_DMA_BOUNDARY		= 0xffffffffU,
+	/* DMA boundary 0xffff is required by the s/g splitting
+	 * we need on /length/ in mv_fill-sg().
+	 */
+	MV_DMA_BOUNDARY		= 0xffffU,
 
 	/* mask of register bits containing lower 32 bits
 	 * of EDMA request queue DMA address
@@ -448,7 +451,7 @@ static struct scsi_host_template mv5_sht = {
 	.queuecommand		= ata_scsi_queuecmd,
 	.can_queue		= ATA_DEF_QUEUE,
 	.this_id		= ATA_SHT_THIS_ID,
-	.sg_tablesize		= MV_MAX_SG_CT,
+	.sg_tablesize		= MV_MAX_SG_CT / 2,
 	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
 	.emulated		= ATA_SHT_EMULATED,
 	.use_clustering		= 1,
@@ -466,7 +469,7 @@ static struct scsi_host_template mv6_sht = {
 	.queuecommand		= ata_scsi_queuecmd,
 	.can_queue		= ATA_DEF_QUEUE,
 	.this_id		= ATA_SHT_THIS_ID,
-	.sg_tablesize		= MV_MAX_SG_CT,
+	.sg_tablesize		= MV_MAX_SG_CT / 2,
 	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
 	.emulated		= ATA_SHT_EMULATED,
 	.use_clustering		= 1,
-- 
cgit v1.2.3-70-g09d2


From 1855256c497ecfefc730df6032243f26855ce52c Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Wed, 3 Oct 2007 15:15:40 -0400
Subject: drivers/firmware: const-ify DMI API and internals

Three main sets of changes:

1) dmi_get_system_info() return value should have been marked const,
   since callers should not be changing that data.

2) const-ify DMI internals, since DMI firmware tables should,
   whenever possible, be marked const to ensure we never ever write to
   that data area.

3) const-ify DMI API, to enable marking tables const where possible
   in low-level drivers.

And if we're really lucky, this might enable some additional
optimizations on the part of the compiler.

The bulk of the changes are #2 and #3, which are interrelated.  #1 could
have been a separate patch, but it was so small compared to the others,
it was easier to roll it into this changeset.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
 arch/i386/kernel/acpi/boot.c                |  8 ++--
 arch/i386/kernel/acpi/sleep.c               |  2 +-
 arch/i386/kernel/apm.c                      | 18 ++++-----
 arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c |  4 +-
 arch/i386/kernel/reboot.c                   |  2 +-
 arch/i386/kernel/tsc.c                      |  2 +-
 arch/i386/mach-generic/bigsmp.c             |  4 +-
 arch/i386/pci/common.c                      |  4 +-
 arch/i386/pci/irq.c                         |  4 +-
 drivers/acpi/osl.c                          |  2 +-
 drivers/acpi/processor_idle.c               |  2 +-
 drivers/acpi/sleep/main.c                   |  2 +-
 drivers/acpi/thermal.c                      |  8 ++--
 drivers/ata/ata_piix.c                      |  4 +-
 drivers/ata/pata_ali.c                      |  2 +-
 drivers/ata/pata_cs5530.c                   |  2 +-
 drivers/ata/pata_via.c                      |  2 +-
 drivers/char/i8k.c                          |  4 +-
 drivers/char/ipmi/ipmi_si_intf.c            |  9 +++--
 drivers/firmware/dmi_scan.c                 | 57 ++++++++++++++++-------------
 drivers/hwmon/abituguru.c                   |  2 +-
 drivers/hwmon/applesmc.c                    |  2 +-
 drivers/hwmon/hdaps.c                       |  4 +-
 drivers/ide/pci/alim15x3.c                  |  2 +-
 drivers/ide/pci/via82cxxx.c                 |  2 +-
 drivers/input/misc/wistron_btns.c           |  2 +-
 drivers/input/mouse/lifebook.c              |  6 +--
 drivers/input/mouse/synaptics.c             |  2 +-
 drivers/misc/msi-laptop.c                   |  2 +-
 drivers/misc/sony-laptop.c                  |  4 +-
 drivers/misc/thinkpad_acpi.c                |  2 +-
 drivers/pnp/pnpbios/core.c                  |  2 +-
 drivers/usb/host/uhci-hcd.c                 |  2 +-
 drivers/video/imacfb.c                      |  2 +-
 include/linux/dmi.h                         | 22 +++++------
 35 files changed, 103 insertions(+), 97 deletions(-)

(limited to 'drivers/ata')

diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index cacdd883bf2..afd2afe9102 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -907,7 +907,7 @@ static void __init acpi_process_madt(void)
 
 #ifdef __i386__
 
-static int __init disable_acpi_irq(struct dmi_system_id *d)
+static int __init disable_acpi_irq(const struct dmi_system_id *d)
 {
 	if (!acpi_force) {
 		printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
@@ -917,7 +917,7 @@ static int __init disable_acpi_irq(struct dmi_system_id *d)
 	return 0;
 }
 
-static int __init disable_acpi_pci(struct dmi_system_id *d)
+static int __init disable_acpi_pci(const struct dmi_system_id *d)
 {
 	if (!acpi_force) {
 		printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
@@ -927,7 +927,7 @@ static int __init disable_acpi_pci(struct dmi_system_id *d)
 	return 0;
 }
 
-static int __init dmi_disable_acpi(struct dmi_system_id *d)
+static int __init dmi_disable_acpi(const struct dmi_system_id *d)
 {
 	if (!acpi_force) {
 		printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
@@ -942,7 +942,7 @@ static int __init dmi_disable_acpi(struct dmi_system_id *d)
 /*
  * Limit ACPI to CPU enumeration for HT
  */
-static int __init force_acpi_ht(struct dmi_system_id *d)
+static int __init force_acpi_ht(const struct dmi_system_id *d)
 {
 	if (!acpi_force) {
 		printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
diff --git a/arch/i386/kernel/acpi/sleep.c b/arch/i386/kernel/acpi/sleep.c
index c42b5ab49de..10699489cfe 100644
--- a/arch/i386/kernel/acpi/sleep.c
+++ b/arch/i386/kernel/acpi/sleep.c
@@ -84,7 +84,7 @@ __setup("acpi_sleep=", acpi_sleep_setup);
 
 /* Ouch, we want to delete this. We already have better version in userspace, in
    s2ram from suspend.sf.net project */
-static __init int reset_videomode_after_s3(struct dmi_system_id *d)
+static __init int reset_videomode_after_s3(const struct dmi_system_id *d)
 {
 	acpi_realmode_flags |= 2;
 	return 0;
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index f02a8aca826..32f2365c26e 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -1869,7 +1869,7 @@ static struct miscdevice apm_device = {
 
 
 /* Simple "print if true" callback */
-static int __init print_if_true(struct dmi_system_id *d)
+static int __init print_if_true(const struct dmi_system_id *d)
 {
 	printk("%s\n", d->ident);
 	return 0;
@@ -1879,14 +1879,14 @@ static int __init print_if_true(struct dmi_system_id *d)
  * Some Bioses enable the PS/2 mouse (touchpad) at resume, even if it was
  * disabled before the suspend. Linux used to get terribly confused by that.
  */
-static int __init broken_ps2_resume(struct dmi_system_id *d)
+static int __init broken_ps2_resume(const struct dmi_system_id *d)
 {
 	printk(KERN_INFO "%s machine detected. Mousepad Resume Bug workaround hopefully not needed.\n", d->ident);
 	return 0;
 }
 
 /* Some bioses have a broken protected mode poweroff and need to use realmode */
-static int __init set_realmode_power_off(struct dmi_system_id *d)
+static int __init set_realmode_power_off(const struct dmi_system_id *d)
 {
 	if (apm_info.realmode_power_off == 0) {
 		apm_info.realmode_power_off = 1;
@@ -1896,7 +1896,7 @@ static int __init set_realmode_power_off(struct dmi_system_id *d)
 }
 
 /* Some laptops require interrupts to be enabled during APM calls */
-static int __init set_apm_ints(struct dmi_system_id *d)
+static int __init set_apm_ints(const struct dmi_system_id *d)
 {
 	if (apm_info.allow_ints == 0) {
 		apm_info.allow_ints = 1;
@@ -1906,7 +1906,7 @@ static int __init set_apm_ints(struct dmi_system_id *d)
 }
 
 /* Some APM bioses corrupt memory or just plain do not work */
-static int __init apm_is_horked(struct dmi_system_id *d)
+static int __init apm_is_horked(const struct dmi_system_id *d)
 {
 	if (apm_info.disabled == 0) {
 		apm_info.disabled = 1;
@@ -1915,7 +1915,7 @@ static int __init apm_is_horked(struct dmi_system_id *d)
 	return 0;
 }
 
-static int __init apm_is_horked_d850md(struct dmi_system_id *d)
+static int __init apm_is_horked_d850md(const struct dmi_system_id *d)
 {
 	if (apm_info.disabled == 0) {
 		apm_info.disabled = 1;
@@ -1927,7 +1927,7 @@ static int __init apm_is_horked_d850md(struct dmi_system_id *d)
 }
 
 /* Some APM bioses hang on APM idle calls */
-static int __init apm_likes_to_melt(struct dmi_system_id *d)
+static int __init apm_likes_to_melt(const struct dmi_system_id *d)
 {
 	if (apm_info.forbid_idle == 0) {
 		apm_info.forbid_idle = 1;
@@ -1951,7 +1951,7 @@ static int __init apm_likes_to_melt(struct dmi_system_id *d)
  *	Phoenix A04  08/24/2000 is known bad (Dell Inspiron 5000e)
  *	Phoenix A07  09/29/2000 is known good (Dell Inspiron 5000)
  */
-static int __init broken_apm_power(struct dmi_system_id *d)
+static int __init broken_apm_power(const struct dmi_system_id *d)
 {
 	apm_info.get_power_status_broken = 1;
 	printk(KERN_WARNING "BIOS strings suggest APM bugs, disabling power status reporting.\n");
@@ -1962,7 +1962,7 @@ static int __init broken_apm_power(struct dmi_system_id *d)
  * This bios swaps the APM minute reporting bytes over (Many sony laptops
  * have this problem).
  */
-static int __init swab_apm_power_in_minutes(struct dmi_system_id *d)
+static int __init swab_apm_power_in_minutes(const struct dmi_system_id *d)
 {
 	apm_info.get_power_status_swabinminutes = 1;
 	printk(KERN_WARNING "BIOS strings suggest APM reports battery life in minutes and wrong byte order.\n");
diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 705e13a3078..b6434a7ef8b 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -533,13 +533,13 @@ static int __init acpi_cpufreq_early_init(void)
  */
 static int bios_with_sw_any_bug;
 
-static int sw_any_bug_found(struct dmi_system_id *d)
+static int sw_any_bug_found(const struct dmi_system_id *d)
 {
 	bios_with_sw_any_bug = 1;
 	return 0;
 }
 
-static struct dmi_system_id sw_any_bug_dmi_table[] = {
+static const struct dmi_system_id sw_any_bug_dmi_table[] = {
 	{
 		.callback = sw_any_bug_found,
 		.ident = "Supermicro Server X6DLP",
diff --git a/arch/i386/kernel/reboot.c b/arch/i386/kernel/reboot.c
index 0d796248866..b37ed226830 100644
--- a/arch/i386/kernel/reboot.c
+++ b/arch/i386/kernel/reboot.c
@@ -79,7 +79,7 @@ __setup("reboot=", reboot_setup);
 /*
  * Some machines require the "reboot=b"  commandline option, this quirk makes that automatic.
  */
-static int __init set_bios_reboot(struct dmi_system_id *d)
+static int __init set_bios_reboot(const struct dmi_system_id *d)
 {
 	if (!reboot_thru_bios) {
 		reboot_thru_bios = 1;
diff --git a/arch/i386/kernel/tsc.c b/arch/i386/kernel/tsc.c
index a39280b4dd3..3ed0ae8c918 100644
--- a/arch/i386/kernel/tsc.c
+++ b/arch/i386/kernel/tsc.c
@@ -305,7 +305,7 @@ void mark_tsc_unstable(char *reason)
 }
 EXPORT_SYMBOL_GPL(mark_tsc_unstable);
 
-static int __init dmi_mark_tsc_unstable(struct dmi_system_id *d)
+static int __init dmi_mark_tsc_unstable(const struct dmi_system_id *d)
 {
 	printk(KERN_NOTICE "%s detected: marking TSC unstable.\n",
 		       d->ident);
diff --git a/arch/i386/mach-generic/bigsmp.c b/arch/i386/mach-generic/bigsmp.c
index 58a477baec3..292a225edab 100644
--- a/arch/i386/mach-generic/bigsmp.c
+++ b/arch/i386/mach-generic/bigsmp.c
@@ -21,7 +21,7 @@
 
 static int dmi_bigsmp; /* can be set by dmi scanners */
 
-static int hp_ht_bigsmp(struct dmi_system_id *d)
+static int hp_ht_bigsmp(const struct dmi_system_id *d)
 {
 #ifdef CONFIG_X86_GENERICARCH
 	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
@@ -31,7 +31,7 @@ static int hp_ht_bigsmp(struct dmi_system_id *d)
 }
 
 
-static struct dmi_system_id bigsmp_dmi_table[] = {
+static const struct dmi_system_id bigsmp_dmi_table[] = {
 	{ hp_ht_bigsmp, "HP ProLiant DL760 G2", {
 		DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 		DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index ebc6f3c6634..07d5223442b 100644
--- a/arch/i386/pci/common.c
+++ b/arch/i386/pci/common.c
@@ -123,7 +123,7 @@ void __devinit  pcibios_fixup_bus(struct pci_bus *b)
  * on the kernel command line (which was parsed earlier).
  */
 
-static int __devinit set_bf_sort(struct dmi_system_id *d)
+static int __devinit set_bf_sort(const struct dmi_system_id *d)
 {
 	if (pci_bf_sort == pci_bf_sort_default) {
 		pci_bf_sort = pci_dmi_bf;
@@ -136,7 +136,7 @@ static int __devinit set_bf_sort(struct dmi_system_id *d)
  * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus)
  */
 #ifdef __i386__
-static int __devinit assign_all_busses(struct dmi_system_id *d)
+static int __devinit assign_all_busses(const struct dmi_system_id *d)
 {
 	pci_probe |= PCI_ASSIGN_ALL_BUSSES;
 	printk(KERN_INFO "%s detected: enabling PCI bus# renumbering"
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index 8434f2323b8..d98c6b096f8 100644
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -1010,7 +1010,7 @@ static void __init pcibios_fixup_irqs(void)
  * Work around broken HP Pavilion Notebooks which assign USB to
  * IRQ 9 even though it is actually wired to IRQ 11
  */
-static int __init fix_broken_hp_bios_irq9(struct dmi_system_id *d)
+static int __init fix_broken_hp_bios_irq9(const struct dmi_system_id *d)
 {
 	if (!broken_hp_bios_irq9) {
 		broken_hp_bios_irq9 = 1;
@@ -1023,7 +1023,7 @@ static int __init fix_broken_hp_bios_irq9(struct dmi_system_id *d)
  * Work around broken Acer TravelMate 360 Notebooks which assign
  * Cardbus to IRQ 11 even though it is actually wired to IRQ 10
  */
-static int __init fix_acer_tm360_irqrouting(struct dmi_system_id *d)
+static int __init fix_acer_tm360_irqrouting(const struct dmi_system_id *d)
 {
 	if (!acer_tm360_irqrouting) {
 		acer_tm360_irqrouting = 1;
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 12c09fafce9..352cf81af58 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1214,7 +1214,7 @@ acpi_os_validate_address (
 }
 
 #ifdef CONFIG_DMI
-static int dmi_osi_linux(struct dmi_system_id *d)
+static int dmi_osi_linux(const struct dmi_system_id *d)
 {
 	printk(KERN_NOTICE "%s detected: enabling _OSI(Linux)\n", d->ident);
 	enable_osi_linux(1);
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index f18261368e7..1e8287b4f40 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -92,7 +92,7 @@ module_param(bm_history, uint, 0644);
  *
  * To skip this limit, boot/load with a large max_cstate limit.
  */
-static int set_max_cstate(struct dmi_system_id *id)
+static int set_max_cstate(const struct dmi_system_id *id)
 {
 	if (max_cstate > ACPI_PROCESSOR_MAX_POWER)
 		return 0;
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 2cbb9aabd00..5055acf2163 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -215,7 +215,7 @@ static struct pm_ops acpi_pm_ops = {
  * Toshiba fails to preserve interrupts over S1, reinitialization
  * of 8259 is needed after S1 resume.
  */
-static int __init init_ints_after_s1(struct dmi_system_id *d)
+static int __init init_ints_after_s1(const struct dmi_system_id *d)
 {
 	printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);
 	init_8259A_after_S1 = 1;
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index bc6d5866ef9..ad898e10c1a 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -1360,7 +1360,7 @@ static int acpi_thermal_resume(struct acpi_device *device)
 }
 
 #ifdef CONFIG_DMI
-static int thermal_act(struct dmi_system_id *d) {
+static int thermal_act(const struct dmi_system_id *d) {
 
 	if (act == 0) {
 		printk(KERN_NOTICE "ACPI: %s detected: "
@@ -1369,14 +1369,14 @@ static int thermal_act(struct dmi_system_id *d) {
 	}
 	return 0;
 }
-static int thermal_nocrt(struct dmi_system_id *d) {
+static int thermal_nocrt(const struct dmi_system_id *d) {
 
 	printk(KERN_NOTICE "ACPI: %s detected: "
 		"disabling all critical thermal trip point actions.\n", d->ident);
 	nocrt = 1;
 	return 0;
 }
-static int thermal_tzp(struct dmi_system_id *d) {
+static int thermal_tzp(const struct dmi_system_id *d) {
 
 	if (tzp == 0) {
 		printk(KERN_NOTICE "ACPI: %s detected: "
@@ -1385,7 +1385,7 @@ static int thermal_tzp(struct dmi_system_id *d) {
 	}
 	return 0;
 }
-static int thermal_psv(struct dmi_system_id *d) {
+static int thermal_psv(const struct dmi_system_id *d) {
 
 	if (psv == 0) {
 		printk(KERN_NOTICE "ACPI: %s detected: "
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 6996eb5b750..92c2d5082be 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -919,7 +919,7 @@ static void ich_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 #ifdef CONFIG_PM
 static int piix_broken_suspend(void)
 {
-	static struct dmi_system_id sysids[] = {
+	static const struct dmi_system_id sysids[] = {
 		{
 			.ident = "TECRA M3",
 			.matches = {
@@ -1183,7 +1183,7 @@ static void __devinit piix_init_sata_map(struct pci_dev *pdev,
 
 static void piix_iocfg_bit18_quirk(struct pci_dev *pdev)
 {
-	static struct dmi_system_id sysids[] = {
+	static const struct dmi_system_id sysids[] = {
 		{
 			/* Clevo M570U sets IOCFG bit 18 if the cdrom
 			 * isn't used to boot the system which
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 71bdc3b3189..32a10c99c06 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -40,7 +40,7 @@
  *	Cable special cases
  */
 
-static struct dmi_system_id cable_dmi_table[] = {
+static const struct dmi_system_id cable_dmi_table[] = {
 	{
 		.ident = "HP Pavilion N5430",
 		.matches = {
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index c6066aa43ec..eaaea848b64 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -214,7 +214,7 @@ static struct ata_port_operations cs5530_port_ops = {
 	.port_start	= ata_port_start,
 };
 
-static struct dmi_system_id palmax_dmi_table[] = {
+static const struct dmi_system_id palmax_dmi_table[] = {
 	{
 		.ident = "Palmax PD1100",
 		.matches = {
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 636c4f1a0b2..f143db4559e 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -129,7 +129,7 @@ static const struct via_isa_bridge {
  *	Cable special cases
  */
 
-static struct dmi_system_id cable_dmi_table[] = {
+static const struct dmi_system_id cable_dmi_table[] = {
 	{
 		.ident = "Acer Ferrari 3400",
 		.matches = {
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 0289705967d..cd406416eff 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -98,9 +98,9 @@ struct smm_regs {
 	unsigned int edi __attribute__ ((packed));
 };
 
-static inline char *i8k_get_dmi_data(int field)
+static inline const char *i8k_get_dmi_data(int field)
 {
-	char *dmi_data = dmi_get_system_info(field);
+	const char *dmi_data = dmi_get_system_info(field);
 
 	return dmi_data && *dmi_data ? dmi_data : "?";
 }
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index dd441ff4af5..7901d5f218e 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1965,10 +1965,10 @@ struct dmi_ipmi_data
 	u8              slave_addr;
 };
 
-static int __devinit decode_dmi(struct dmi_header *dm,
+static int __devinit decode_dmi(const struct dmi_header *dm,
 				struct dmi_ipmi_data *dmi)
 {
-	u8              *data = (u8 *)dm;
+	const u8	*data = (const u8 *)dm;
 	unsigned long  	base_addr;
 	u8		reg_spacing;
 	u8              len = dm->length;
@@ -2091,13 +2091,14 @@ static __devinit void try_init_dmi(struct dmi_ipmi_data *ipmi_data)
 
 static void __devinit dmi_find_bmc(void)
 {
-	struct dmi_device    *dev = NULL;
+	const struct dmi_device *dev = NULL;
 	struct dmi_ipmi_data data;
 	int                  rv;
 
 	while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
 		memset(&data, 0, sizeof(data));
-		rv = decode_dmi((struct dmi_header *) dev->device_data, &data);
+		rv = decode_dmi((const struct dmi_header *) dev->device_data,
+				&data);
 		if (!rv)
 			try_init_dmi(&data);
 	}
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index f7318b3b51f..0cdadea7a40 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -8,9 +8,9 @@
 #include <linux/slab.h>
 #include <asm/dmi.h>
 
-static char * __init dmi_string(struct dmi_header *dm, u8 s)
+static char * __init dmi_string(const struct dmi_header *dm, u8 s)
 {
-	u8 *bp = ((u8 *) dm) + dm->length;
+	const u8 *bp = ((u8 *) dm) + dm->length;
 	char *str = "";
 
 	if (s) {
@@ -37,7 +37,7 @@ static char * __init dmi_string(struct dmi_header *dm, u8 s)
  *	pointing to completely the wrong place for example
  */
 static int __init dmi_table(u32 base, int len, int num,
-			    void (*decode)(struct dmi_header *))
+			    void (*decode)(const struct dmi_header *))
 {
 	u8 *buf, *data;
 	int i = 0;
@@ -53,7 +53,8 @@ static int __init dmi_table(u32 base, int len, int num,
 	 *	OR we run off the end of the table (also happens)
 	 */
 	while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
-		struct dmi_header *dm = (struct dmi_header *)data;
+		const struct dmi_header *dm = (const struct dmi_header *)data;
+
 		/*
 		 *  We want to know the total length (formated area and strings)
 		 *  before decoding to make sure we won't run off the table in
@@ -71,7 +72,7 @@ static int __init dmi_table(u32 base, int len, int num,
 	return 0;
 }
 
-static int __init dmi_checksum(u8 *buf)
+static int __init dmi_checksum(const u8 *buf)
 {
 	u8 sum = 0;
 	int a;
@@ -89,9 +90,10 @@ int dmi_available;
 /*
  *	Save a DMI string
  */
-static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
+static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string)
 {
-	char *p, *d = (char*) dm;
+	const char *d = (const char*) dm;
+	char *p;
 
 	if (dmi_ident[slot])
 		return;
@@ -103,9 +105,9 @@ static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
 	dmi_ident[slot] = p;
 }
 
-static void __init dmi_save_uuid(struct dmi_header *dm, int slot, int index)
+static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index)
 {
-	u8 *d = (u8*) dm + index;
+	const u8 *d = (u8*) dm + index;
 	char *s;
 	int is_ff = 1, is_00 = 1, i;
 
@@ -132,9 +134,9 @@ static void __init dmi_save_uuid(struct dmi_header *dm, int slot, int index)
         dmi_ident[slot] = s;
 }
 
-static void __init dmi_save_type(struct dmi_header *dm, int slot, int index)
+static void __init dmi_save_type(const struct dmi_header *dm, int slot, int index)
 {
-	u8 *d = (u8*) dm + index;
+	const u8 *d = (u8*) dm + index;
 	char *s;
 
 	if (dmi_ident[slot])
@@ -148,13 +150,13 @@ static void __init dmi_save_type(struct dmi_header *dm, int slot, int index)
 	dmi_ident[slot] = s;
 }
 
-static void __init dmi_save_devices(struct dmi_header *dm)
+static void __init dmi_save_devices(const struct dmi_header *dm)
 {
 	int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
 	struct dmi_device *dev;
 
 	for (i = 0; i < count; i++) {
-		char *d = (char *)(dm + 1) + (i * 2);
+		const char *d = (char *)(dm + 1) + (i * 2);
 
 		/* Skip disabled device */
 		if ((*d & 0x80) == 0)
@@ -173,7 +175,7 @@ static void __init dmi_save_devices(struct dmi_header *dm)
 	}
 }
 
-static void __init dmi_save_oem_strings_devices(struct dmi_header *dm)
+static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm)
 {
 	int i, count = *(u8 *)(dm + 1);
 	struct dmi_device *dev;
@@ -194,7 +196,7 @@ static void __init dmi_save_oem_strings_devices(struct dmi_header *dm)
 	}
 }
 
-static void __init dmi_save_ipmi_device(struct dmi_header *dm)
+static void __init dmi_save_ipmi_device(const struct dmi_header *dm)
 {
 	struct dmi_device *dev;
 	void * data;
@@ -225,7 +227,7 @@ static void __init dmi_save_ipmi_device(struct dmi_header *dm)
  *	and machine entries. For 2.5 we should pull the smbus controller info
  *	out of here.
  */
-static void __init dmi_decode(struct dmi_header *dm)
+static void __init dmi_decode(const struct dmi_header *dm)
 {
 	switch(dm->type) {
 	case 0:		/* BIOS Information */
@@ -265,9 +267,10 @@ static void __init dmi_decode(struct dmi_header *dm)
 	}
 }
 
-static int __init dmi_present(char __iomem *p)
+static int __init dmi_present(const char __iomem *p)
 {
 	u8 buf[15];
+
 	memcpy_fromio(buf, p, 15);
 	if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
 		u16 num = (buf[13] << 8) | buf[12];
@@ -348,10 +351,10 @@ void __init dmi_scan_machine(void)
  *	returns non zero or we hit the end. Callback function is called for
  *	each successful match. Returns the number of matches.
  */
-int dmi_check_system(struct dmi_system_id *list)
+int dmi_check_system(const struct dmi_system_id *list)
 {
 	int i, count = 0;
-	struct dmi_system_id *d = list;
+	const struct dmi_system_id *d = list;
 
 	while (d->ident) {
 		for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
@@ -380,7 +383,7 @@ EXPORT_SYMBOL(dmi_check_system);
  *	Returns one DMI data value, can be used to perform
  *	complex DMI data checks.
  */
-char *dmi_get_system_info(int field)
+const char *dmi_get_system_info(int field)
 {
 	return dmi_ident[field];
 }
@@ -391,7 +394,7 @@ EXPORT_SYMBOL(dmi_get_system_info);
  *	dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information.
  *	@str: 	Case sensitive Name
  */
-int dmi_name_in_vendors(char *str)
+int dmi_name_in_vendors(const char *str)
 {
 	static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR,
 				DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR,
@@ -418,13 +421,15 @@ EXPORT_SYMBOL(dmi_name_in_vendors);
  *	A new search is initiated by passing %NULL as the @from argument.
  *	If @from is not %NULL, searches continue from next device.
  */
-struct dmi_device * dmi_find_device(int type, const char *name,
-				    struct dmi_device *from)
+const struct dmi_device * dmi_find_device(int type, const char *name,
+				    const struct dmi_device *from)
 {
-	struct list_head *d, *head = from ? &from->list : &dmi_devices;
+	const struct list_head *head = from ? &from->list : &dmi_devices;
+	struct list_head *d;
 
 	for(d = head->next; d != &dmi_devices; d = d->next) {
-		struct dmi_device *dev = list_entry(d, struct dmi_device, list);
+		const struct dmi_device *dev =
+			list_entry(d, struct dmi_device, list);
 
 		if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) &&
 		    ((name == NULL) || (strcmp(dev->name, name) == 0)))
@@ -444,7 +449,7 @@ EXPORT_SYMBOL(dmi_find_device);
 int dmi_get_year(int field)
 {
 	int year;
-	char *s = dmi_get_system_info(field);
+	const char *s = dmi_get_system_info(field);
 
 	if (!s)
 		return -1;
diff --git a/drivers/hwmon/abituguru.c b/drivers/hwmon/abituguru.c
index d575ee958de..2317f4bb9c9 100644
--- a/drivers/hwmon/abituguru.c
+++ b/drivers/hwmon/abituguru.c
@@ -1449,7 +1449,7 @@ static int __init abituguru_init(void)
 	struct resource res = { .flags = IORESOURCE_IO };
 
 #ifdef CONFIG_DMI
-	char *board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
+	const char *board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
 
 	/* safety check, refuse to load on non Abit motherboards */
 	if (!force && (!board_vendor ||
diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index 941729a131f..56213b7f818 100644
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -1071,7 +1071,7 @@ static const struct attribute_group temperature_attributes_group =
 /*
  * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
  */
-static int applesmc_dmi_match(struct dmi_system_id *id)
+static int applesmc_dmi_match(const struct dmi_system_id *id)
 {
 	int i = 0;
 	struct dmi_match_data* dmi_data = id->driver_data;
diff --git a/drivers/hwmon/hdaps.c b/drivers/hwmon/hdaps.c
index e0cf5e6fe5b..a7c6d407572 100644
--- a/drivers/hwmon/hdaps.c
+++ b/drivers/hwmon/hdaps.c
@@ -480,14 +480,14 @@ static struct attribute_group hdaps_attribute_group = {
 /* Module stuff */
 
 /* hdaps_dmi_match - found a match.  return one, short-circuiting the hunt. */
-static int __init hdaps_dmi_match(struct dmi_system_id *id)
+static int __init hdaps_dmi_match(const struct dmi_system_id *id)
 {
 	printk(KERN_INFO "hdaps: %s detected.\n", id->ident);
 	return 1;
 }
 
 /* hdaps_dmi_match_invert - found an inverted match. */
-static int __init hdaps_dmi_match_invert(struct dmi_system_id *id)
+static int __init hdaps_dmi_match_invert(const struct dmi_system_id *id)
 {
 	hdaps_invert = 1;
 	printk(KERN_INFO "hdaps: inverting axis readings.\n");
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index 11ecb618007..20ebe3b7049 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -588,7 +588,7 @@ out:
  *	Cable special cases
  */
 
-static struct dmi_system_id cable_dmi_table[] = {
+static const struct dmi_system_id cable_dmi_table[] = {
 	{
 		.ident = "HP Pavilion N5430",
 		.matches = {
diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
index a7be7795e6a..c10203a3215 100644
--- a/drivers/ide/pci/via82cxxx.c
+++ b/drivers/ide/pci/via82cxxx.c
@@ -419,7 +419,7 @@ static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const
  *	Cable special cases
  */
 
-static struct dmi_system_id cable_dmi_table[] = {
+static const struct dmi_system_id cable_dmi_table[] = {
 	{
 		.ident = "Acer Ferrari 3400",
 		.matches = {
diff --git a/drivers/input/misc/wistron_btns.c b/drivers/input/misc/wistron_btns.c
index 60121f10f8d..b438d998625 100644
--- a/drivers/input/misc/wistron_btns.c
+++ b/drivers/input/misc/wistron_btns.c
@@ -247,7 +247,7 @@ static int have_wifi;
 static int have_bluetooth;
 static int have_leds;
 
-static int __init dmi_matched(struct dmi_system_id *dmi)
+static int __init dmi_matched(const struct dmi_system_id *dmi)
 {
 	const struct key_entry *key;
 
diff --git a/drivers/input/mouse/lifebook.c b/drivers/input/mouse/lifebook.c
index 91109b49fde..608674d0be8 100644
--- a/drivers/input/mouse/lifebook.c
+++ b/drivers/input/mouse/lifebook.c
@@ -27,7 +27,7 @@ struct lifebook_data {
 
 static const char *desired_serio_phys;
 
-static int lifebook_set_serio_phys(struct dmi_system_id *d)
+static int lifebook_set_serio_phys(const struct dmi_system_id *d)
 {
 	desired_serio_phys = d->driver_data;
 	return 0;
@@ -35,13 +35,13 @@ static int lifebook_set_serio_phys(struct dmi_system_id *d)
 
 static unsigned char lifebook_use_6byte_proto;
 
-static int lifebook_set_6byte_proto(struct dmi_system_id *d)
+static int lifebook_set_6byte_proto(const struct dmi_system_id *d)
 {
 	lifebook_use_6byte_proto = 1;
 	return 0;
 }
 
-static struct dmi_system_id lifebook_dmi_table[] = {
+static const struct dmi_system_id lifebook_dmi_table[] = {
 	{
 		.ident = "FLORA-ie 55mi",
 		.matches = {
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 666ad3a53fd..d349c4a5e3e 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -602,7 +602,7 @@ static int synaptics_reconnect(struct psmouse *psmouse)
 
 #if defined(__i386__)
 #include <linux/dmi.h>
-static struct dmi_system_id toshiba_dmi_table[] = {
+static const struct dmi_system_id toshiba_dmi_table[] = {
 	{
 		.ident = "Toshiba Satellite",
 		.matches = {
diff --git a/drivers/misc/msi-laptop.c b/drivers/misc/msi-laptop.c
index 349be934db7..83679c76292 100644
--- a/drivers/misc/msi-laptop.c
+++ b/drivers/misc/msi-laptop.c
@@ -283,7 +283,7 @@ static struct platform_device *msipf_device;
 
 /* Initialization */
 
-static int dmi_check_cb(struct dmi_system_id *id)
+static int dmi_check_cb(const struct dmi_system_id *id)
 {
         printk("msi-laptop: Identified laptop model '%s'.\n", id->ident);
         return 0;
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index d38ddce592c..e73a71f04bb 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -807,7 +807,7 @@ static struct sony_nc_event *sony_nc_events;
 /* Vaio C* --maybe also FE*, N* and AR* ?-- special init sequence
  * for Fn keys
  */
-static int sony_nc_C_enable(struct dmi_system_id *id)
+static int sony_nc_C_enable(const struct dmi_system_id *id)
 {
 	int result = 0;
 
@@ -845,7 +845,7 @@ static struct sony_nc_event sony_C_events[] = {
 };
 
 /* SNC-only model map */
-static struct dmi_system_id sony_nc_ids[] = {
+static const struct dmi_system_id sony_nc_ids[] = {
 		{
 			.ident = "Sony Vaio FE Series",
 			.callback = sony_nc_C_enable,
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 0222bbaf7b7..6c0b2f0a51a 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -4448,7 +4448,7 @@ static void ibm_exit(struct ibm_struct *ibm)
 
 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
 {
-	struct dmi_device *dev = NULL;
+	const struct dmi_device *dev = NULL;
 	char ec_fw_string[18];
 
 	if (!tp)
diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
index 0691f473e9d..4e9fd37cff3 100644
--- a/drivers/pnp/pnpbios/core.c
+++ b/drivers/pnp/pnpbios/core.c
@@ -500,7 +500,7 @@ static int __init pnpbios_probe_system(void)
 	return 0;
 }
 
-static int __init exploding_pnp_bios(struct dmi_system_id *d)
+static int __init exploding_pnp_bios(const struct dmi_system_id *d)
 {
 	printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident);
 	return 0;
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 805e5fc5f5d..4db17f75f4f 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -237,7 +237,7 @@ static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
 static int remote_wakeup_is_broken(struct uhci_hcd *uhci)
 {
 	int port;
-	char *sys_info;
+	const char *sys_info;
 	static char bad_Asus_board[] = "A7V8X";
 
 	/* One of Asus's motherboards has a bug which causes it to
diff --git a/drivers/video/imacfb.c b/drivers/video/imacfb.c
index 18ea4a54910..6455fd2a39f 100644
--- a/drivers/video/imacfb.c
+++ b/drivers/video/imacfb.c
@@ -58,7 +58,7 @@ static int model		= M_UNKNOWN;
 static int manual_height;
 static int manual_width;
 
-static int set_system(struct dmi_system_id *id)
+static int set_system(const struct dmi_system_id *id)
 {
 	printk(KERN_INFO "imacfb: %s detected - set system to %ld\n",
 		id->ident, (long)id->driver_data);
diff --git a/include/linux/dmi.h b/include/linux/dmi.h
index b8ac7b01c45..00fc7a9c35e 100644
--- a/include/linux/dmi.h
+++ b/include/linux/dmi.h
@@ -54,7 +54,7 @@ struct dmi_strmatch {
 };
 
 struct dmi_system_id {
-	int (*callback)(struct dmi_system_id *);
+	int (*callback)(const struct dmi_system_id *);
 	const char *ident;
 	struct dmi_strmatch matches[4];
 	void *driver_data;
@@ -71,22 +71,22 @@ struct dmi_device {
 
 #ifdef CONFIG_DMI
 
-extern int dmi_check_system(struct dmi_system_id *list);
-extern char * dmi_get_system_info(int field);
-extern struct dmi_device * dmi_find_device(int type, const char *name,
-	struct dmi_device *from);
+extern int dmi_check_system(const struct dmi_system_id *list);
+extern const char * dmi_get_system_info(int field);
+extern const struct dmi_device * dmi_find_device(int type, const char *name,
+	const struct dmi_device *from);
 extern void dmi_scan_machine(void);
 extern int dmi_get_year(int field);
-extern int dmi_name_in_vendors(char *str);
+extern int dmi_name_in_vendors(const char *str);
 
 #else
 
-static inline int dmi_check_system(struct dmi_system_id *list) { return 0; }
-static inline char * dmi_get_system_info(int field) { return NULL; }
-static inline struct dmi_device * dmi_find_device(int type, const char *name,
-	struct dmi_device *from) { return NULL; }
+static inline int dmi_check_system(const struct dmi_system_id *list) { return 0; }
+static inline const char * dmi_get_system_info(int field) { return NULL; }
+static inline const struct dmi_device * dmi_find_device(int type, const char *name,
+	const struct dmi_device *from) { return NULL; }
 static inline int dmi_get_year(int year) { return 0; }
-static inline int dmi_name_in_vendors(char *s) { return 0; }
+static inline int dmi_name_in_vendors(const char *s) { return 0; }
 
 #endif
 
-- 
cgit v1.2.3-70-g09d2


From 6c08772e49622e90d39903e7ff0be1a0f463ac86 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 12 Oct 2007 00:16:23 -0400
Subject: [libata] sata_mv: more S/G fixes

* corruption fix: we only want the lower 16 bits of length (0 == 64kb)

* ditto: the upper layer sets max-phys-segments to LIBATA_MAX_PRD,
  so we must reset it to own hw-specific length.

* delete unused mv_fill_sg() return value

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
 drivers/ata/sata_mv.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index cb7dec97fee..d9832e234e4 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -69,10 +69,11 @@
 #include <linux/device.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_mv"
-#define DRV_VERSION	"1.0"
+#define DRV_VERSION	"1.01"
 
 enum {
 	/* BAR's are enumerated in terms of pci_resource_start() terms */
@@ -420,6 +421,7 @@ static void mv_error_handler(struct ata_port *ap);
 static void mv_post_int_cmd(struct ata_queued_cmd *qc);
 static void mv_eh_freeze(struct ata_port *ap);
 static void mv_eh_thaw(struct ata_port *ap);
+static int mv_slave_config(struct scsi_device *sdev);
 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
 
 static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
@@ -457,7 +459,7 @@ static struct scsi_host_template mv5_sht = {
 	.use_clustering		= 1,
 	.proc_name		= DRV_NAME,
 	.dma_boundary		= MV_DMA_BOUNDARY,
-	.slave_configure	= ata_scsi_slave_config,
+	.slave_configure	= mv_slave_config,
 	.slave_destroy		= ata_scsi_slave_destroy,
 	.bios_param		= ata_std_bios_param,
 };
@@ -475,7 +477,7 @@ static struct scsi_host_template mv6_sht = {
 	.use_clustering		= 1,
 	.proc_name		= DRV_NAME,
 	.dma_boundary		= MV_DMA_BOUNDARY,
-	.slave_configure	= ata_scsi_slave_config,
+	.slave_configure	= mv_slave_config,
 	.slave_destroy		= ata_scsi_slave_destroy,
 	.bios_param		= ata_std_bios_param,
 };
@@ -763,6 +765,17 @@ static void mv_irq_clear(struct ata_port *ap)
 {
 }
 
+static int mv_slave_config(struct scsi_device *sdev)
+{
+	int rc = ata_scsi_slave_config(sdev);
+	if (rc)
+		return rc;
+
+	blk_queue_max_phys_segments(sdev->request_queue, MV_MAX_SG_CT / 2);
+
+	return 0;	/* scsi layer doesn't check return value, sigh */
+}
+
 static void mv_set_edma_ptrs(void __iomem *port_mmio,
 			     struct mv_host_priv *hpriv,
 			     struct mv_port_priv *pp)
@@ -1130,10 +1143,9 @@ static void mv_port_stop(struct ata_port *ap)
  *      LOCKING:
  *      Inherited from caller.
  */
-static unsigned int mv_fill_sg(struct ata_queued_cmd *qc)
+static void mv_fill_sg(struct ata_queued_cmd *qc)
 {
 	struct mv_port_priv *pp = qc->ap->private_data;
-	unsigned int n_sg = 0;
 	struct scatterlist *sg;
 	struct mv_sg *mv_sg;
 
@@ -1151,7 +1163,7 @@ static unsigned int mv_fill_sg(struct ata_queued_cmd *qc)
 
 			mv_sg->addr = cpu_to_le32(addr & 0xffffffff);
 			mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
-			mv_sg->flags_size = cpu_to_le32(len);
+			mv_sg->flags_size = cpu_to_le32(len & 0xffff);
 
 			sg_len -= len;
 			addr += len;
@@ -1160,12 +1172,9 @@ static unsigned int mv_fill_sg(struct ata_queued_cmd *qc)
 				mv_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
 
 			mv_sg++;
-			n_sg++;
 		}
 
 	}
-
-	return n_sg;
 }
 
 static inline void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last)
-- 
cgit v1.2.3-70-g09d2


From 640fdb504941fa2b9f6f274716fc9f97f2bf6bff Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 3 Aug 2007 11:10:07 -0400
Subject: [libata] pdc_adma: convert to new exception handling (EH) framework

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pdc_adma.c | 82 +++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 67 insertions(+), 15 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index 5c79271401a..c95c1bf7df3 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -92,6 +92,8 @@ enum {
 
 	/* CPB bits */
 	cDONE			= (1 << 0),
+	cATERR			= (1 << 3),
+
 	cVLD			= (1 << 0),
 	cDAT			= (1 << 2),
 	cIEN			= (1 << 3),
@@ -131,14 +133,15 @@ static int adma_ata_init_one (struct pci_dev *pdev,
 static int adma_port_start(struct ata_port *ap);
 static void adma_host_stop(struct ata_host *host);
 static void adma_port_stop(struct ata_port *ap);
-static void adma_phy_reset(struct ata_port *ap);
 static void adma_qc_prep(struct ata_queued_cmd *qc);
 static unsigned int adma_qc_issue(struct ata_queued_cmd *qc);
 static int adma_check_atapi_dma(struct ata_queued_cmd *qc);
 static void adma_bmdma_stop(struct ata_queued_cmd *qc);
 static u8 adma_bmdma_status(struct ata_port *ap);
 static void adma_irq_clear(struct ata_port *ap);
-static void adma_eng_timeout(struct ata_port *ap);
+static void adma_freeze(struct ata_port *ap);
+static void adma_thaw(struct ata_port *ap);
+static void adma_error_handler(struct ata_port *ap);
 
 static struct scsi_host_template adma_ata_sht = {
 	.module			= THIS_MODULE,
@@ -165,12 +168,13 @@ static const struct ata_port_operations adma_ata_ops = {
 	.exec_command		= ata_exec_command,
 	.check_status		= ata_check_status,
 	.dev_select		= ata_std_dev_select,
-	.phy_reset		= adma_phy_reset,
 	.check_atapi_dma	= adma_check_atapi_dma,
 	.data_xfer		= ata_data_xfer,
 	.qc_prep		= adma_qc_prep,
 	.qc_issue		= adma_qc_issue,
-	.eng_timeout		= adma_eng_timeout,
+	.freeze			= adma_freeze,
+	.thaw			= adma_thaw,
+	.error_handler		= adma_error_handler,
 	.irq_clear		= adma_irq_clear,
 	.irq_on			= ata_irq_on,
 	.irq_ack		= ata_irq_ack,
@@ -184,7 +188,7 @@ static const struct ata_port_operations adma_ata_ops = {
 static struct ata_port_info adma_port_info[] = {
 	/* board_1841_idx */
 	{
-		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST |
+		.flags		= ATA_FLAG_SLAVE_POSS |
 				  ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO |
 				  ATA_FLAG_PIO_POLLING,
 		.pio_mask	= 0x10, /* pio4 */
@@ -273,24 +277,41 @@ static inline void adma_enter_reg_mode(struct ata_port *ap)
 	readb(chan + ADMA_STATUS);	/* flush */
 }
 
-static void adma_phy_reset(struct ata_port *ap)
+static void adma_freeze(struct ata_port *ap)
 {
-	struct adma_port_priv *pp = ap->private_data;
+	void __iomem *chan = ADMA_PORT_REGS(ap);
+
+	/* mask/clear ATA interrupts */
+	writeb(ATA_NIEN, ap->ioaddr.ctl_addr);
+	ata_check_status(ap);
+
+	/* reset ADMA to idle state */
+	writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL);
+	udelay(2);
+	writew(aPIOMD4 | aNIEN, chan + ADMA_CONTROL);
+	udelay(2);
+}
 
-	pp->state = adma_state_idle;
+static void adma_thaw(struct ata_port *ap)
+{
 	adma_reinit_engine(ap);
-	ata_port_probe(ap);
-	ata_bus_reset(ap);
 }
 
-static void adma_eng_timeout(struct ata_port *ap)
+static int adma_prereset(struct ata_port *ap, unsigned long deadline)
 {
 	struct adma_port_priv *pp = ap->private_data;
 
 	if (pp->state != adma_state_idle) /* healthy paranoia */
 		pp->state = adma_state_mmio;
 	adma_reinit_engine(ap);
-	ata_eng_timeout(ap);
+
+	return ata_std_prereset(ap, deadline);
+}
+
+static void adma_error_handler(struct ata_port *ap)
+{
+	ata_do_eh(ap, adma_prereset, ata_std_softreset, NULL,
+		  ata_std_postreset);
 }
 
 static int adma_fill_sg(struct ata_queued_cmd *qc)
@@ -466,12 +487,31 @@ static inline unsigned int adma_intr_pkt(struct ata_host *host)
 			continue;
 		qc = ata_qc_from_tag(ap, ap->active_tag);
 		if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
-			if ((status & (aPERR | aPSD | aUIRQ)))
+			if (status & aPERR)
+				qc->err_mask |= AC_ERR_HOST_BUS;
+			else if ((status & (aPSD | aUIRQ)))
 				qc->err_mask |= AC_ERR_OTHER;
+
+			if (pp->pkt[0] & cATERR)
+				qc->err_mask |= AC_ERR_DEV;
 			else if (pp->pkt[0] != cDONE)
 				qc->err_mask |= AC_ERR_OTHER;
 
-			ata_qc_complete(qc);
+			if (!qc->err_mask)
+				ata_qc_complete(qc);
+			else {
+				struct ata_eh_info *ehi = &ap->eh_info;
+				ata_ehi_clear_desc(ehi);
+				ata_ehi_push_desc(ehi,
+					"ADMA-status 0x%02X", status);
+				ata_ehi_push_desc(ehi,
+					"pkt[0] 0x%02X", pp->pkt[0]);
+
+				if (qc->err_mask == AC_ERR_DEV)
+					ata_port_abort(ap);
+				else
+					ata_port_freeze(ap);
+			}
 		}
 	}
 	return handled;
@@ -502,7 +542,19 @@ static inline unsigned int adma_intr_mmio(struct ata_host *host)
 				/* complete taskfile transaction */
 				pp->state = adma_state_idle;
 				qc->err_mask |= ac_err_mask(status);
-				ata_qc_complete(qc);
+				if (!qc->err_mask)
+					ata_qc_complete(qc);
+				else {
+					struct ata_eh_info *ehi = &ap->eh_info;
+					ata_ehi_clear_desc(ehi);
+					ata_ehi_push_desc(ehi,
+						"status 0x%02X", status);
+
+					if (qc->err_mask == AC_ERR_DEV)
+						ata_port_abort(ap);
+					else
+						ata_port_freeze(ap);
+				}
 				handled = 1;
 			}
 		}
-- 
cgit v1.2.3-70-g09d2


From 9af5c9c97dc9d599281778864c72b385f0c63341 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:22 +0900
Subject: libata-link: introduce ata_link

Introduce ata_link.  It abstracts PHY and sits between ata_port and
ata_device.  This new level of abstraction is necessary to support
SATA Port Multiplier, which basically adds a bunch of links (PHYs) to
a ATA host port.  Fields related to command execution, spd_limit and
EH are per-link and thus moved to ata_link.

This patch only defines the host link.  Multiple link handling will be
added later.  Also, a lot of ap->link derefences are added but many of
them will be removed as each part is converted to deal directly with
ata_link instead of ata_port.

This patch introduces no behavior change.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c            |  18 ++---
 drivers/ata/ata_generic.c     |   2 +-
 drivers/ata/libata-acpi.c     |  21 +++---
 drivers/ata/libata-core.c     | 157 ++++++++++++++++++++++--------------------
 drivers/ata/libata-eh.c       | 100 ++++++++++++++-------------
 drivers/ata/libata-scsi.c     |  41 +++++------
 drivers/ata/libata-sff.c      |   4 +-
 drivers/ata/pata_it821x.c     |   4 +-
 drivers/ata/pata_ixp4xx_cf.c  |   4 +-
 drivers/ata/pata_legacy.c     |   4 +-
 drivers/ata/pata_optidma.c    |   4 +-
 drivers/ata/pata_pcmcia.c     |   4 +-
 drivers/ata/pata_pdc2027x.c   |   2 +-
 drivers/ata/pata_platform.c   |   2 +-
 drivers/ata/pata_qdi.c        |   2 +-
 drivers/ata/pata_rz1000.c     |   2 +-
 drivers/ata/pata_scc.c        |   2 +-
 drivers/ata/pata_sis.c        |   2 +-
 drivers/ata/pata_winbond.c    |   2 +-
 drivers/ata/pdc_adma.c        |   9 +--
 drivers/ata/sata_inic162x.c   |   7 +-
 drivers/ata/sata_mv.c         |  14 ++--
 drivers/ata/sata_nv.c         |  26 +++----
 drivers/ata/sata_promise.c    |   6 +-
 drivers/ata/sata_qstor.c      |   4 +-
 drivers/ata/sata_sil.c        |  14 ++--
 drivers/ata/sata_sil24.c      |  14 ++--
 drivers/ata/sata_sx4.c        |   4 +-
 drivers/ata/sata_via.c        |   2 +-
 drivers/ata/sata_vsc.c        |   2 +-
 drivers/scsi/ipr.c            |   6 +-
 drivers/scsi/libsas/sas_ata.c |  10 +--
 include/linux/libata.h        |  40 +++++++----
 33 files changed, 280 insertions(+), 255 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index c16820325d7..c72fa468a69 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1064,7 +1064,7 @@ static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
 		ata_port_printk(ap, KERN_WARNING,
 				"failed to reset engine (errno=%d)", rc);
 
-	ata_tf_init(ap->device, &tf);
+	ata_tf_init(ap->link.device, &tf);
 
 	/* issue the first D2H Register FIS */
 	msecs = 0;
@@ -1132,7 +1132,7 @@ static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
 	ahci_stop_engine(ap);
 
 	/* clear D2H reception area to properly wait for D2H FIS */
-	ata_tf_init(ap->device, &tf);
+	ata_tf_init(ap->link.device, &tf);
 	tf.command = 0x80;
 	ata_tf_to_fis(&tf, 0, 0, d2h_fis);
 
@@ -1159,7 +1159,7 @@ static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
 
 	ahci_stop_engine(ap);
 
-	rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context),
+	rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->link.eh_context),
 				 deadline);
 
 	/* vt8251 needs SError cleared for the port to operate */
@@ -1278,7 +1278,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 {
 	struct ahci_port_priv *pp = ap->private_data;
-	struct ata_eh_info *ehi = &ap->eh_info;
+	struct ata_eh_info *ehi = &ap->link.eh_info;
 	unsigned int err_mask = 0, action = 0;
 	struct ata_queued_cmd *qc;
 	u32 serror;
@@ -1332,7 +1332,7 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 	ehi->serror |= serror;
 	ehi->action |= action;
 
-	qc = ata_qc_from_tag(ap, ap->active_tag);
+	qc = ata_qc_from_tag(ap, ap->link.active_tag);
 	if (qc)
 		qc->err_mask |= err_mask;
 	else
@@ -1347,7 +1347,7 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 static void ahci_port_intr(struct ata_port *ap)
 {
 	void __iomem *port_mmio = ap->ioaddr.cmd_addr;
-	struct ata_eh_info *ehi = &ap->eh_info;
+	struct ata_eh_info *ehi = &ap->link.eh_info;
 	struct ahci_port_priv *pp = ap->private_data;
 	u32 status, qc_active;
 	int rc, known_irq = 0;
@@ -1360,7 +1360,7 @@ static void ahci_port_intr(struct ata_port *ap)
 		return;
 	}
 
-	if (ap->sactive)
+	if (ap->link.sactive)
 		qc_active = readl(port_mmio + PORT_SCR_ACT);
 	else
 		qc_active = readl(port_mmio + PORT_CMD_ISSUE);
@@ -1380,7 +1380,7 @@ static void ahci_port_intr(struct ata_port *ap)
 	/* if !NCQ, ignore.  No modern ATA device has broken HSM
 	 * implementation for non-NCQ commands.
 	 */
-	if (!ap->sactive)
+	if (!ap->link.sactive)
 		return;
 
 	if (status & PORT_IRQ_D2H_REG_FIS) {
@@ -1433,7 +1433,7 @@ static void ahci_port_intr(struct ata_port *ap)
 	if (!known_irq)
 		ata_port_printk(ap, KERN_INFO, "spurious interrupt "
 				"(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
-				status, ap->active_tag, ap->sactive);
+				status, ap->link.active_tag, ap->link.sactive);
 }
 
 static void ahci_irq_clear(struct ata_port *ap)
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 94546695472..b5e390ff5bd 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -53,7 +53,7 @@ static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
 		dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index c059f78ad94..0023ac4ff49 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -44,7 +44,8 @@ static void ata_acpi_associate_sata_port(struct ata_port *ap)
 {
 	acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
 
-	ap->device->acpi_handle = acpi_get_child(ap->host->acpi_handle, adr);
+	ap->link.device->acpi_handle =
+		acpi_get_child(ap->host->acpi_handle, adr);
 }
 
 static void ata_acpi_associate_ide_port(struct ata_port *ap)
@@ -60,7 +61,7 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap)
 		max_devices++;
 
 	for (i = 0; i < max_devices; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 
 		dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
 	}
@@ -182,10 +183,10 @@ static int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm)
 	/* Buffers for id may need byteswapping ? */
 	in_params[1].type = ACPI_TYPE_BUFFER;
 	in_params[1].buffer.length = 512;
-	in_params[1].buffer.pointer = (u8 *)ap->device[0].id;
+	in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
 	in_params[2].type = ACPI_TYPE_BUFFER;
 	in_params[2].buffer.length = 512;
-	in_params[2].buffer.pointer = (u8 *)ap->device[1].id;
+	in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
 
 	input.count = 3;
 	input.pointer = in_params;
@@ -226,7 +227,7 @@ static int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm)
 static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
 			   void **ptr_to_free)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	acpi_status status;
 	struct acpi_buffer output;
 	union acpi_object *out_obj;
@@ -320,7 +321,7 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
 static int taskfile_load_raw(struct ata_device *dev,
 			      const struct ata_acpi_gtf *gtf)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	struct ata_taskfile tf, rtf;
 	unsigned int err_mask;
 
@@ -424,7 +425,7 @@ static int ata_acpi_exec_tfs(struct ata_device *dev)
  */
 static int ata_acpi_push_id(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	int err;
 	acpi_status status;
 	struct acpi_object_list input;
@@ -519,7 +520,7 @@ void ata_acpi_on_resume(struct ata_port *ap)
 
 	/* schedule _GTF */
 	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		ap->device[i].flags |= ATA_DFLAG_ACPI_PENDING;
+		ap->link.device[i].flags |= ATA_DFLAG_ACPI_PENDING;
 }
 
 /**
@@ -538,8 +539,8 @@ void ata_acpi_on_resume(struct ata_port *ap)
  */
 int ata_acpi_on_devcfg(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_port *ap = dev->link->ap;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
 	int rc;
 
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 772be09b468..dd2de485124 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -235,7 +235,7 @@ static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
 	if (dev->flags & ATA_DFLAG_PIO) {
 		tf->protocol = ATA_PROT_PIO;
 		index = dev->multi_count ? 0 : 8;
-	} else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) {
+	} else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
 		/* Unable to use DMA due to host limitation */
 		tf->protocol = ATA_PROT_PIO;
 		index = dev->multi_count ? 0 : 8;
@@ -604,7 +604,7 @@ static const char *sata_spd_string(unsigned int spd)
 void ata_dev_disable(struct ata_device *dev)
 {
 	if (ata_dev_enabled(dev)) {
-		if (ata_msg_drv(dev->ap))
+		if (ata_msg_drv(dev->link->ap))
 			ata_dev_printk(dev, KERN_WARNING, "disabled\n");
 		ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
 					     ATA_DNXFER_QUIET);
@@ -735,7 +735,7 @@ ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
 	/* see if device passed diags: if master then continue and warn later */
 	if (err == 0 && device == 0)
 		/* diagnostic fail : do nothing _YET_ */
-		ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC;
+		ap->link.device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC;
 	else if (err == 1)
 		/* do nothing */ ;
 	else if ((device == 0) && (err == 0x81))
@@ -1150,7 +1150,7 @@ void ata_dev_select(struct ata_port *ap, unsigned int device,
 	ap->ops->dev_select(ap, device);
 
 	if (wait) {
-		if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
+		if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI)
 			msleep(150);
 		ata_wait_idle(ap);
 	}
@@ -1346,7 +1346,8 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
 			      int dma_dir, struct scatterlist *sg,
 			      unsigned int n_elem)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_link *link = dev->link;
+	struct ata_port *ap = link->ap;
 	u8 command = tf->command;
 	struct ata_queued_cmd *qc;
 	unsigned int tag, preempted_tag;
@@ -1386,11 +1387,11 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
 	qc->dev = dev;
 	ata_qc_reinit(qc);
 
-	preempted_tag = ap->active_tag;
-	preempted_sactive = ap->sactive;
+	preempted_tag = link->active_tag;
+	preempted_sactive = link->sactive;
 	preempted_qc_active = ap->qc_active;
-	ap->active_tag = ATA_TAG_POISON;
-	ap->sactive = 0;
+	link->active_tag = ATA_TAG_POISON;
+	link->sactive = 0;
 	ap->qc_active = 0;
 
 	/* prepare & issue qc */
@@ -1467,8 +1468,8 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
 	err_mask = qc->err_mask;
 
 	ata_qc_free(qc);
-	ap->active_tag = preempted_tag;
-	ap->sactive = preempted_sactive;
+	link->active_tag = preempted_tag;
+	link->sactive = preempted_sactive;
 	ap->qc_active = preempted_qc_active;
 
 	/* XXX - Some LLDDs (sata_mv) disable port on command failure.
@@ -1566,7 +1567,7 @@ unsigned int ata_pio_need_iordy(const struct ata_device *adev)
 {
 	/* Controller doesn't support  IORDY. Probably a pointless check
 	   as the caller should know this */
-	if (adev->ap->flags & ATA_FLAG_NO_IORDY)
+	if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
 		return 0;
 	/* PIO3 and higher it is mandatory */
 	if (adev->pio_mode > XFER_PIO_2)
@@ -1622,7 +1623,7 @@ static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 		    unsigned int flags, u16 *id)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	unsigned int class = *p_class;
 	struct ata_taskfile tf;
 	unsigned int err_mask = 0;
@@ -1774,13 +1775,14 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 
 static inline u8 ata_dev_knobble(struct ata_device *dev)
 {
-	return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
+	struct ata_port *ap = dev->link->ap;
+	return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
 }
 
 static void ata_dev_config_ncq(struct ata_device *dev,
 			       char *desc, size_t desc_sz)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
 
 	if (!ata_id_has_ncq(dev->id)) {
@@ -1817,8 +1819,8 @@ static void ata_dev_config_ncq(struct ata_device *dev,
  */
 int ata_dev_configure(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_port *ap = dev->link->ap;
+	struct ata_eh_context *ehc = &dev->link->eh_context;
 	int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
 	const u16 *id = dev->id;
 	unsigned int xfer_mask;
@@ -2116,7 +2118,7 @@ int ata_bus_probe(struct ata_port *ap)
 	ap->ops->phy_reset(ap);
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 
 		if (!(ap->flags & ATA_FLAG_DISABLED) &&
 		    dev->class != ATA_DEV_UNKNOWN)
@@ -2133,14 +2135,14 @@ int ata_bus_probe(struct ata_port *ap)
 	   state is undefined. Record the mode */
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		ap->device[i].pio_mode = XFER_PIO_0;
+		ap->link.device[i].pio_mode = XFER_PIO_0;
 
 	/* read IDENTIFY page and configure devices. We have to do the identify
 	   specific sequence bass-ackwards so that PDIAG- is released by
 	   the slave device */
 
 	for (i = ATA_MAX_DEVICES - 1; i >=  0; i--) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 
 		if (tries[i])
 			dev->class = classes[i];
@@ -2162,13 +2164,13 @@ int ata_bus_probe(struct ata_port *ap)
 	   this in the normal order so that the user doesn't get confused */
 
 	for(i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 		if (!ata_dev_enabled(dev))
 			continue;
 
-		ap->eh_context.i.flags |= ATA_EHI_PRINTINFO;
+		ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
 		rc = ata_dev_configure(dev);
-		ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
+		ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
 		if (rc)
 			goto fail;
 	}
@@ -2179,7 +2181,7 @@ int ata_bus_probe(struct ata_port *ap)
 		goto fail;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		if (ata_dev_enabled(&ap->device[i]))
+		if (ata_dev_enabled(&ap->link.device[i]))
 			return 0;
 
 	/* no device present, disable port */
@@ -2344,8 +2346,8 @@ void sata_phy_reset(struct ata_port *ap)
 
 struct ata_device *ata_dev_pair(struct ata_device *adev)
 {
-	struct ata_port *ap = adev->ap;
-	struct ata_device *pair = &ap->device[1 - adev->devno];
+	struct ata_link *link = adev->link;
+	struct ata_device *pair = &link->device[1 - adev->devno];
 	if (!ata_dev_enabled(pair))
 		return NULL;
 	return pair;
@@ -2366,8 +2368,8 @@ struct ata_device *ata_dev_pair(struct ata_device *adev)
 
 void ata_port_disable(struct ata_port *ap)
 {
-	ap->device[0].class = ATA_DEV_NONE;
-	ap->device[1].class = ATA_DEV_NONE;
+	ap->link.device[0].class = ATA_DEV_NONE;
+	ap->link.device[1].class = ATA_DEV_NONE;
 	ap->flags |= ATA_FLAG_DISABLED;
 }
 
@@ -2400,9 +2402,9 @@ int sata_down_spd_limit(struct ata_port *ap)
 	if (rc == 0)
 		spd = (sstatus >> 4) & 0xf;
 	else
-		spd = ap->sata_spd;
+		spd = ap->link.sata_spd;
 
-	mask = ap->sata_spd_limit;
+	mask = ap->link.sata_spd_limit;
 	if (mask <= 1)
 		return -EINVAL;
 
@@ -2422,7 +2424,7 @@ int sata_down_spd_limit(struct ata_port *ap)
 	if (!mask)
 		return -EINVAL;
 
-	ap->sata_spd_limit = mask;
+	ap->link.sata_spd_limit = mask;
 
 	ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
 			sata_spd_string(fls(mask)));
@@ -2434,10 +2436,10 @@ static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
 {
 	u32 spd, limit;
 
-	if (ap->sata_spd_limit == UINT_MAX)
+	if (ap->link.sata_spd_limit == UINT_MAX)
 		limit = 0;
 	else
-		limit = fls(ap->sata_spd_limit);
+		limit = fls(ap->link.sata_spd_limit);
 
 	spd = (*scontrol >> 4) & 0xf;
 	*scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
@@ -2450,7 +2452,7 @@ static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
  *	@ap: Port in question
  *
  *	Test whether the spd limit in SControl matches
- *	@ap->sata_spd_limit.  This function is used to determine
+ *	@ap->link.sata_spd_limit.  This function is used to determine
  *	whether hardreset is necessary to apply SATA spd
  *	configuration.
  *
@@ -2749,7 +2751,7 @@ int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
 
 static int ata_dev_set_mode(struct ata_device *dev)
 {
-	struct ata_eh_context *ehc = &dev->ap->eh_context;
+	struct ata_eh_context *ehc = &dev->link->eh_context;
 	unsigned int err_mask;
 	int rc;
 
@@ -2809,7 +2811,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
 		unsigned int pio_mask, dma_mask;
 
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 
 		if (!ata_dev_enabled(dev))
 			continue;
@@ -2830,7 +2832,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 
 	/* step 2: always set host PIO timings */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 		if (!ata_dev_enabled(dev))
 			continue;
 
@@ -2848,7 +2850,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 
 	/* step 3: set host DMA timings */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 
 		if (!ata_dev_enabled(dev) || !dev->dma_mode)
 			continue;
@@ -2861,7 +2863,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 
 	/* step 4: update devices' xfer mode */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 
 		/* don't update suspended devices' xfer mode */
 		if (!ata_dev_enabled(dev))
@@ -3142,6 +3144,7 @@ static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
 
 void ata_bus_reset(struct ata_port *ap)
 {
+	struct ata_device *device = ap->link.device;
 	struct ata_ioports *ioaddr = &ap->ioaddr;
 	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
 	u8 err;
@@ -3177,19 +3180,19 @@ void ata_bus_reset(struct ata_port *ap)
 	/*
 	 * determine by signature whether we have ATA or ATAPI devices
 	 */
-	ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
+	device[0].class = ata_dev_try_classify(ap, 0, &err);
 	if ((slave_possible) && (err != 0x81))
-		ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
+		device[1].class = ata_dev_try_classify(ap, 1, &err);
 
 	/* is double-select really necessary? */
-	if (ap->device[1].class != ATA_DEV_NONE)
+	if (device[1].class != ATA_DEV_NONE)
 		ap->ops->dev_select(ap, 1);
-	if (ap->device[0].class != ATA_DEV_NONE)
+	if (device[0].class != ATA_DEV_NONE)
 		ap->ops->dev_select(ap, 0);
 
 	/* if no devices were detected, disable this port */
-	if ((ap->device[0].class == ATA_DEV_NONE) &&
-	    (ap->device[1].class == ATA_DEV_NONE))
+	if ((device[0].class == ATA_DEV_NONE) &&
+	    (device[1].class == ATA_DEV_NONE))
 		goto err_out;
 
 	if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
@@ -3331,7 +3334,7 @@ int sata_phy_resume(struct ata_port *ap, const unsigned long *params,
  */
 int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	const unsigned long *timing = sata_ehc_deb_timing(ehc);
 	int rc;
 
@@ -3503,7 +3506,7 @@ int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
 int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
 		       unsigned long deadline)
 {
-	const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context);
+	const unsigned long *timing = sata_ehc_deb_timing(&ap->link.eh_context);
 	int rc;
 
 	DPRINTK("ENTER\n");
@@ -3652,7 +3655,7 @@ static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
 {
 	unsigned int class = dev->class;
-	u16 *id = (void *)dev->ap->sector_buf;
+	u16 *id = (void *)dev->link->ap->sector_buf;
 	int rc;
 
 	/* read ID data */
@@ -3837,7 +3840,7 @@ static int ata_dma_blacklisted(const struct ata_device *dev)
 	 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
 	 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
 	 */
-	if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) &&
+	if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
 	    (dev->flags & ATA_DFLAG_CDB_INTR))
 		return 1;
 	return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
@@ -3857,7 +3860,8 @@ static int ata_dma_blacklisted(const struct ata_device *dev)
  */
 static void ata_dev_xfermask(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_link *link = dev->link;
+	struct ata_port *ap = link->ap;
 	struct ata_host *host = ap->host;
 	unsigned long xfer_mask;
 
@@ -4482,7 +4486,7 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words)
 void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
 		   unsigned int buflen, int write_data)
 {
-	struct ata_port *ap = adev->ap;
+	struct ata_port *ap = adev->link->ap;
 	unsigned int words = buflen >> 1;
 
 	/* Transfer multiple of 2 bytes */
@@ -5188,7 +5192,7 @@ static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
 
 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	struct ata_queued_cmd *qc;
 
 	qc = ata_qc_new(ap);
@@ -5231,6 +5235,7 @@ void ata_qc_free(struct ata_queued_cmd *qc)
 void __ata_qc_complete(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
+	struct ata_link *link = qc->dev->link;
 
 	WARN_ON(qc == NULL);	/* ata_qc_from_tag _might_ return NULL */
 	WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
@@ -5240,9 +5245,9 @@ void __ata_qc_complete(struct ata_queued_cmd *qc)
 
 	/* command should be marked inactive atomically with qc completion */
 	if (qc->tf.protocol == ATA_PROT_NCQ)
-		ap->sactive &= ~(1 << qc->tag);
+		link->sactive &= ~(1 << qc->tag);
 	else
-		ap->active_tag = ATA_TAG_POISON;
+		link->active_tag = ATA_TAG_POISON;
 
 	/* atapi: mark qc as inactive to prevent the interrupt handler
 	 * from completing the command twice later, before the error handler
@@ -5411,19 +5416,20 @@ static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
 void ata_qc_issue(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
+	struct ata_link *link = qc->dev->link;
 
 	/* Make sure only one non-NCQ command is outstanding.  The
 	 * check is skipped for old EH because it reuses active qc to
 	 * request ATAPI sense.
 	 */
-	WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
+	WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag));
 
 	if (qc->tf.protocol == ATA_PROT_NCQ) {
-		WARN_ON(ap->sactive & (1 << qc->tag));
-		ap->sactive |= 1 << qc->tag;
+		WARN_ON(link->sactive & (1 << qc->tag));
+		link->sactive |= 1 << qc->tag;
 	} else {
-		WARN_ON(ap->sactive);
-		ap->active_tag = qc->tag;
+		WARN_ON(link->sactive);
+		link->active_tag = qc->tag;
 	}
 
 	qc->flags |= ATA_QCFLAG_ACTIVE;
@@ -5606,7 +5612,7 @@ unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
 inline unsigned int ata_host_intr (struct ata_port *ap,
 				   struct ata_queued_cmd *qc)
 {
-	struct ata_eh_info *ehi = &ap->eh_info;
+	struct ata_eh_info *ehi = &ap->link.eh_info;
 	u8 status, host_stat = 0;
 
 	VPRINTK("ata%u: protocol %d task_state %d\n",
@@ -5721,7 +5727,7 @@ irqreturn_t ata_interrupt (int irq, void *dev_instance)
 		    !(ap->flags & ATA_FLAG_DISABLED)) {
 			struct ata_queued_cmd *qc;
 
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			qc = ata_qc_from_tag(ap, ap->link.active_tag);
 			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
 			    (qc->flags & ATA_QCFLAG_ACTIVE))
 				handled |= ata_host_intr(ap, qc);
@@ -5921,8 +5927,8 @@ static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
 		}
 
 		ap->pflags |= ATA_PFLAG_PM_PENDING;
-		ap->eh_info.action |= action;
-		ap->eh_info.flags |= ehi_flags;
+		ap->link.eh_info.action |= action;
+		ap->link.eh_info.flags |= ehi_flags;
 
 		ata_port_schedule_eh(ap);
 
@@ -6026,12 +6032,13 @@ int ata_port_start(struct ata_port *ap)
  */
 void ata_dev_init(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_link *link = dev->link;
+	struct ata_port *ap = link->ap;
 	unsigned long flags;
 
 	/* SATA spd limit is bound to the first device */
-	ap->sata_spd_limit = ap->hw_sata_spd_limit;
-	ap->sata_spd = 0;
+	link->sata_spd_limit = link->hw_sata_spd_limit;
+	link->sata_spd = 0;
 
 	/* High bits of dev->flags are used to record warm plug
 	 * requests which occur asynchronously.  Synchronize using
@@ -6080,8 +6087,8 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 	ap->host = host;
 	ap->dev = host->dev;
 
-	ap->hw_sata_spd_limit = UINT_MAX;
-	ap->active_tag = ATA_TAG_POISON;
+	ap->link.hw_sata_spd_limit = UINT_MAX;
+	ap->link.active_tag = ATA_TAG_POISON;
 	ap->last_ctl = 0xFF;
 
 #if defined(ATA_VERBOSE_DEBUG)
@@ -6104,9 +6111,11 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 
 	ap->cbl = ATA_CBL_NONE;
 
+	ap->link.ap = ap;
+
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
-		dev->ap = ap;
+		struct ata_device *dev = &ap->link.device[i];
+		dev->link = &ap->link;
 		dev->devno = i;
 		ata_dev_init(dev);
 	}
@@ -6402,9 +6411,9 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 		if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
 			int spd = (scontrol >> 4) & 0xf;
 			if (spd)
-				ap->hw_sata_spd_limit &= (1 << spd) - 1;
+				ap->link.hw_sata_spd_limit &= (1 << spd) - 1;
 		}
-		ap->sata_spd_limit = ap->hw_sata_spd_limit;
+		ap->link.sata_spd_limit = ap->link.hw_sata_spd_limit;
 
 		/* report the secondary IRQ for second channel legacy */
 		irq_line = host->irq;
@@ -6436,7 +6445,7 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 
 		/* probe */
 		if (ap->ops->error_handler) {
-			struct ata_eh_info *ehi = &ap->eh_info;
+			struct ata_eh_info *ehi = &ap->link.eh_info;
 			unsigned long flags;
 
 			ata_port_probe(ap);
@@ -6560,7 +6569,7 @@ void ata_port_detach(struct ata_port *ap)
 	spin_lock_irqsave(ap->lock, flags);
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		ata_dev_disable(&ap->device[i]);
+		ata_dev_disable(&ap->link.device[i]);
 
 	spin_unlock_irqrestore(ap->lock, flags);
 
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index ac6ceed4bb6..e2681f56ed4 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -195,7 +195,7 @@ static int ata_ering_map(struct ata_ering *ering,
 
 static unsigned int ata_eh_dev_action(struct ata_device *dev)
 {
-	struct ata_eh_context *ehc = &dev->ap->eh_context;
+	struct ata_eh_context *ehc = &dev->link->eh_context;
 
 	return ehc->i.action | ehc->i.dev_action[dev->devno];
 }
@@ -261,7 +261,7 @@ enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
 
 	ret = EH_HANDLED;
 	spin_lock_irqsave(ap->lock, flags);
-	qc = ata_qc_from_tag(ap, ap->active_tag);
+	qc = ata_qc_from_tag(ap, ap->link.active_tag);
 	if (qc) {
 		WARN_ON(qc->scsicmd != cmd);
 		qc->flags |= ATA_QCFLAG_EH_SCHEDULED;
@@ -371,9 +371,9 @@ void ata_scsi_error(struct Scsi_Host *host)
 		/* fetch & clear EH info */
 		spin_lock_irqsave(ap->lock, flags);
 
-		memset(&ap->eh_context, 0, sizeof(ap->eh_context));
-		ap->eh_context.i = ap->eh_info;
-		memset(&ap->eh_info, 0, sizeof(ap->eh_info));
+		memset(&ap->link.eh_context, 0, sizeof(ap->link.eh_context));
+		ap->link.eh_context.i = ap->link.eh_info;
+		memset(&ap->link.eh_info, 0, sizeof(ap->link.eh_info));
 
 		ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS;
 		ap->pflags &= ~ATA_PFLAG_EH_PENDING;
@@ -409,7 +409,7 @@ void ata_scsi_error(struct Scsi_Host *host)
 		}
 
 		/* this run is complete, make sure EH info is clear */
-		memset(&ap->eh_info, 0, sizeof(ap->eh_info));
+		memset(&ap->link.eh_info, 0, sizeof(ap->link.eh_info));
 
 		/* Clear host_eh_scheduled while holding ap->lock such
 		 * that if exception occurs after this point but
@@ -420,7 +420,7 @@ void ata_scsi_error(struct Scsi_Host *host)
 
 		spin_unlock_irqrestore(ap->lock, flags);
 	} else {
-		WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL);
+		WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL);
 		ap->ops->eng_timeout(ap);
 	}
 
@@ -575,7 +575,7 @@ void ata_eng_timeout(struct ata_port *ap)
 {
 	DPRINTK("ENTER\n");
 
-	ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
+	ata_qc_timeout(ata_qc_from_tag(ap, ap->link.active_tag));
 
 	DPRINTK("EXIT\n");
 }
@@ -922,7 +922,7 @@ void ata_eh_qc_retry(struct ata_queued_cmd *qc)
  */
 static void ata_eh_detach_dev(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	unsigned long flags;
 
 	ata_dev_disable(dev);
@@ -937,8 +937,8 @@ static void ata_eh_detach_dev(struct ata_device *dev)
 	}
 
 	/* clear per-dev EH actions */
-	ata_eh_clear_action(dev, &ap->eh_info, ATA_EH_PERDEV_MASK);
-	ata_eh_clear_action(dev, &ap->eh_context.i, ATA_EH_PERDEV_MASK);
+	ata_eh_clear_action(dev, &dev->link->eh_info, ATA_EH_PERDEV_MASK);
+	ata_eh_clear_action(dev, &dev->link->eh_context.i, ATA_EH_PERDEV_MASK);
 
 	spin_unlock_irqrestore(ap->lock, flags);
 }
@@ -950,8 +950,8 @@ static void ata_eh_detach_dev(struct ata_device *dev)
  *	@action: action about to be performed
  *
  *	Called just before performing EH actions to clear related bits
- *	in @ap->eh_info such that eh actions are not unnecessarily
- *	repeated.
+ *	in @ap->link.eh_info such that eh actions are not
+ *	unnecessarily repeated.
  *
  *	LOCKING:
  *	None.
@@ -960,8 +960,8 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
 			       unsigned int action)
 {
 	unsigned long flags;
-	struct ata_eh_info *ehi = &ap->eh_info;
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_info *ehi = &ap->link.eh_info;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 
 	spin_lock_irqsave(ap->lock, flags);
 
@@ -993,7 +993,7 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
  *	@action: action just completed
  *
  *	Called right after performing EH actions to clear related bits
- *	in @ap->eh_context.
+ *	in @ap->link.eh_context.
  *
  *	LOCKING:
  *	None.
@@ -1001,13 +1001,15 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
 static void ata_eh_done(struct ata_port *ap, struct ata_device *dev,
 			unsigned int action)
 {
+	struct ata_eh_context *ehc = &ap->link.eh_context;
+
 	/* if reset is complete, clear all reset actions & reset modifier */
 	if (action & ATA_EH_RESET_MASK) {
 		action |= ATA_EH_RESET_MASK;
-		ap->eh_context.i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
+		ehc->i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
 	}
 
-	ata_eh_clear_action(dev, &ap->eh_context.i, action);
+	ata_eh_clear_action(dev, &ehc->i, action);
 }
 
 /**
@@ -1101,7 +1103,7 @@ static unsigned int ata_read_log_page(struct ata_device *dev,
 static int ata_eh_read_log_10h(struct ata_device *dev,
 			       int *tag, struct ata_taskfile *tf)
 {
-	u8 *buf = dev->ap->sector_buf;
+	u8 *buf = dev->link->ap->sector_buf;
 	unsigned int err_mask;
 	u8 csum;
 	int i;
@@ -1155,7 +1157,7 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
 {
 	struct ata_device *dev = qc->dev;
 	unsigned char *sense_buf = qc->scsicmd->sense_buffer;
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	struct ata_taskfile tf;
 	u8 cdb[ATAPI_CDB_LEN];
 
@@ -1206,7 +1208,7 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
  */
 static void ata_eh_analyze_serror(struct ata_port *ap)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	u32 serror = ehc->i.serror;
 	unsigned int err_mask = 0, action = 0;
 
@@ -1248,8 +1250,8 @@ static void ata_eh_analyze_serror(struct ata_port *ap)
  */
 static void ata_eh_analyze_ncq_error(struct ata_port *ap)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
-	struct ata_device *dev = ap->device;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_device *dev = ap->link.device;
 	struct ata_queued_cmd *qc;
 	struct ata_taskfile tf;
 	int tag, rc;
@@ -1259,7 +1261,7 @@ static void ata_eh_analyze_ncq_error(struct ata_port *ap)
 		return;
 
 	/* is it NCQ device error? */
-	if (!ap->sactive || !(ehc->i.err_mask & AC_ERR_DEV))
+	if (!ap->link.sactive || !(ehc->i.err_mask & AC_ERR_DEV))
 		return;
 
 	/* has LLDD analyzed already? */
@@ -1281,7 +1283,7 @@ static void ata_eh_analyze_ncq_error(struct ata_port *ap)
 		return;
 	}
 
-	if (!(ap->sactive & (1 << tag))) {
+	if (!(ap->link.sactive & (1 << tag))) {
 		ata_port_printk(ap, KERN_ERR, "log page 10h reported "
 				"inactive tag %d\n", tag);
 		return;
@@ -1497,7 +1499,7 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
 	/* speed down? */
 	if (verdict & ATA_EH_SPDN_SPEED_DOWN) {
 		/* speed down SATA link speed if possible */
-		if (sata_down_spd_limit(dev->ap) == 0) {
+		if (sata_down_spd_limit(dev->link->ap) == 0) {
 			action |= ATA_EH_HARDRESET;
 			goto done;
 		}
@@ -1528,7 +1530,7 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
 	 * SATA.  Consider it only for PATA.
 	 */
 	if ((verdict & ATA_EH_SPDN_FALLBACK_TO_PIO) && (dev->spdn_cnt >= 2) &&
-	    (dev->ap->cbl != ATA_CBL_SATA) &&
+	    (dev->link->ap->cbl != ATA_CBL_SATA) &&
 	    (dev->xfer_shift != ATA_SHIFT_PIO)) {
 		if (ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO) == 0) {
 			dev->spdn_cnt = 0;
@@ -1557,7 +1559,7 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
  */
 static void ata_eh_autopsy(struct ata_port *ap)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	unsigned int all_err_mask = 0;
 	int tag, is_io = 0;
 	u32 serror;
@@ -1656,7 +1658,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
  */
 static void ata_eh_report(struct ata_port *ap)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	const char *frozen, *desc;
 	int tag, nr_failed = 0;
 
@@ -1685,15 +1687,15 @@ static void ata_eh_report(struct ata_port *ap)
 	if (ehc->i.dev) {
 		ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x "
 			       "SAct 0x%x SErr 0x%x action 0x%x%s\n",
-			       ehc->i.err_mask, ap->sactive, ehc->i.serror,
-			       ehc->i.action, frozen);
+			       ehc->i.err_mask, ap->link.sactive,
+			       ehc->i.serror, ehc->i.action, frozen);
 		if (desc)
 			ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc);
 	} else {
 		ata_port_printk(ap, KERN_ERR, "exception Emask 0x%x "
 				"SAct 0x%x SErr 0x%x action 0x%x%s\n",
-				ehc->i.err_mask, ap->sactive, ehc->i.serror,
-				ehc->i.action, frozen);
+				ehc->i.err_mask, ap->link.sactive,
+				ehc->i.serror, ehc->i.action, frozen);
 		if (desc)
 			ata_port_printk(ap, KERN_ERR, "%s\n", desc);
 	}
@@ -1775,7 +1777,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 			ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	unsigned int *classes = ehc->classes;
 	int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
 	int try = 0;
@@ -1804,7 +1806,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			if (rc == -ENOENT) {
 				ata_port_printk(ap, KERN_DEBUG,
 						"port disabled. ignoring.\n");
-				ap->eh_context.i.action &= ~ATA_EH_RESET_MASK;
+				ehc->i.action &= ~ATA_EH_RESET_MASK;
 
 				for (i = 0; i < ATA_MAX_DEVICES; i++)
 					classes[i] = ATA_DEV_NONE;
@@ -1907,11 +1909,11 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		 * controller state is undefined.  Record the mode.
 		 */
 		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			ap->device[i].pio_mode = XFER_PIO_0;
+			ap->link.device[i].pio_mode = XFER_PIO_0;
 
 		/* record current link speed */
 		if (sata_scr_read(ap, SCR_STATUS, &sstatus) == 0)
-			ap->sata_spd = (sstatus >> 4) & 0xf;
+			ap->link.sata_spd = (sstatus >> 4) & 0xf;
 
 		if (postreset)
 			postreset(ap, classes);
@@ -1929,7 +1931,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 					struct ata_device **r_failed_dev)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	struct ata_device *dev;
 	unsigned int new_mask = 0;
 	unsigned long flags;
@@ -1944,7 +1946,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) {
 		unsigned int action, readid_flags = 0;
 
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 		action = ata_eh_dev_action(dev);
 
 		if (ehc->i.flags & ATA_EHI_DID_RESET)
@@ -2004,7 +2006,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	 * device detection messages backwards.
 	 */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 
 		if (!(new_mask & (1 << i)))
 			continue;
@@ -2036,7 +2038,7 @@ static int ata_port_nr_enabled(struct ata_port *ap)
 	int i, cnt = 0;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		if (ata_dev_enabled(&ap->device[i]))
+		if (ata_dev_enabled(&ap->link.device[i]))
 			cnt++;
 	return cnt;
 }
@@ -2046,14 +2048,14 @@ static int ata_port_nr_vacant(struct ata_port *ap)
 	int i, cnt = 0;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		if (ap->device[i].class == ATA_DEV_UNKNOWN)
+		if (ap->link.device[i].class == ATA_DEV_UNKNOWN)
 			cnt++;
 	return cnt;
 }
 
 static int ata_eh_skip_recovery(struct ata_port *ap)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	int i;
 
 	/* thaw frozen port, resume link and recover failed devices */
@@ -2063,7 +2065,7 @@ static int ata_eh_skip_recovery(struct ata_port *ap)
 
 	/* skip if class codes for all vacant slots are ATA_DEV_NONE */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 
 		if (dev->class == ATA_DEV_UNKNOWN &&
 		    ehc->classes[dev->devno] != ATA_DEV_NONE)
@@ -2075,8 +2077,8 @@ static int ata_eh_skip_recovery(struct ata_port *ap)
 
 static void ata_eh_handle_dev_fail(struct ata_device *dev, int err)
 {
-	struct ata_port *ap = dev->ap;
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_port *ap = dev->link->ap;
+	struct ata_eh_context *ehc = &dev->link->eh_context;
 
 	ehc->tries[dev->devno]--;
 
@@ -2149,7 +2151,7 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 			  ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 			  ata_postreset_fn_t postreset)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	struct ata_device *dev;
 	int i, rc;
 
@@ -2157,7 +2159,7 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 
 	/* prep for recovery */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 
 		ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
 
@@ -2240,7 +2242,7 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
  out:
 	if (rc) {
 		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			ata_dev_disable(&ap->device[i]);
+			ata_dev_disable(&ap->link.device[i]);
 	}
 
 	DPRINTK("EXIT, rc=%d\n", rc);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index e83647651b3..ec0e2638200 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1368,14 +1368,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
 		case ATA_CMD_SET_FEATURES:
 			if ((qc->tf.feature == SETFEATURES_WC_ON) ||
 			    (qc->tf.feature == SETFEATURES_WC_OFF)) {
-				ap->eh_info.action |= ATA_EH_REVALIDATE;
+				ap->link.eh_info.action |= ATA_EH_REVALIDATE;
 				ata_port_schedule_eh(ap);
 			}
 			break;
 
 		case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
 		case ATA_CMD_SET_MULTI: /* multi_count changed */
-			ap->eh_info.action |= ATA_EH_REVALIDATE;
+			ap->link.eh_info.action |= ATA_EH_REVALIDATE;
 			ata_port_schedule_eh(ap);
 			break;
 		}
@@ -1439,14 +1439,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
  */
 static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_link *link = dev->link;
 	int is_ncq = is_io && ata_ncq_enabled(dev);
 
 	if (is_ncq) {
-		if (!ata_tag_valid(ap->active_tag))
+		if (!ata_tag_valid(link->active_tag))
 			return 0;
 	} else {
-		if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
+		if (!ata_tag_valid(link->active_tag) && !link->sactive)
 			return 0;
 	}
 	return 1;
@@ -2426,7 +2426,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
 static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
 {
 	if (likely(id < ATA_MAX_DEVICES))
-		return &ap->device[id];
+		return &ap->link.device[id];
 	return NULL;
 }
 
@@ -2458,7 +2458,7 @@ static int ata_scsi_dev_enabled(struct ata_device *dev)
 	if (unlikely(!ata_dev_enabled(dev)))
 		return 0;
 
-	if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
+	if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
 		if (unlikely(dev->class == ATA_DEV_ATAPI)) {
 			ata_dev_printk(dev, KERN_WARNING,
 				       "WARNING: ATAPI is %s, device ignored.\n",
@@ -2961,7 +2961,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
 		struct scsi_device *sdev;
 
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 
 		if (!ata_dev_enabled(dev) || dev->sdev)
 			continue;
@@ -2978,7 +2978,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
 	 * whether all devices are attached.
 	 */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 		if (ata_dev_enabled(dev) && !dev->sdev)
 			break;
 	}
@@ -3049,7 +3049,7 @@ int ata_scsi_offline_dev(struct ata_device *dev)
  */
 static void ata_scsi_remove_dev(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
+	struct ata_port *ap = dev->link->ap;
 	struct scsi_device *sdev;
 	unsigned long flags;
 
@@ -3123,7 +3123,7 @@ void ata_scsi_hotplug(struct work_struct *work)
 
 	/* unplug detached devices */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 		unsigned long flags;
 
 		if (!(dev->flags & ATA_DFLAG_DETACHED))
@@ -3162,6 +3162,7 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 			      unsigned int id, unsigned int lun)
 {
 	struct ata_port *ap = ata_shost_to_port(shost);
+	struct ata_eh_info *ehi = &ap->link.eh_info;
 	unsigned long flags;
 	int rc = 0;
 
@@ -3175,15 +3176,15 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 	spin_lock_irqsave(ap->lock, flags);
 
 	if (id == SCAN_WILD_CARD) {
-		ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
-		ap->eh_info.action |= ATA_EH_SOFTRESET;
+		ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
+		ehi->action |= ATA_EH_SOFTRESET;
 	} else {
 		struct ata_device *dev = ata_find_dev(ap, id);
 
 		if (dev) {
-			ap->eh_info.probe_mask |= 1 << dev->devno;
-			ap->eh_info.action |= ATA_EH_SOFTRESET;
-			ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
+			ehi->probe_mask |= 1 << dev->devno;
+			ehi->action |= ATA_EH_SOFTRESET;
+			ehi->flags |= ATA_EHI_RESUME_LINK;
 		} else
 			rc = -EINVAL;
 	}
@@ -3220,7 +3221,7 @@ void ata_scsi_dev_rescan(struct work_struct *work)
 	spin_lock_irqsave(ap->lock, flags);
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 		struct scsi_device *sdev = dev->sdev;
 
 		if (!ata_dev_enabled(dev) || !sdev)
@@ -3359,7 +3360,7 @@ EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
 {
 	ata_scsi_sdev_config(sdev);
-	ata_scsi_dev_config(sdev, ap->device);
+	ata_scsi_dev_config(sdev, ap->link.device);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
@@ -3382,8 +3383,8 @@ int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
 
 	ata_scsi_dump_cdb(ap, cmd);
 
-	if (likely(ata_scsi_dev_enabled(ap->device)))
-		rc = __ata_scsi_queuecmd(cmd, done, ap->device);
+	if (likely(ata_scsi_dev_enabled(ap->link.device)))
+		rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
 	else {
 		cmd->result = (DID_BAD_TARGET << 16);
 		done(cmd);
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 8023167bbbe..2100cd61ed6 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -445,7 +445,7 @@ void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
 	unsigned long flags;
 	int thaw = 0;
 
-	qc = __ata_qc_from_tag(ap, ap->active_tag);
+	qc = __ata_qc_from_tag(ap, ap->link.active_tag);
 	if (qc && !(qc->flags & ATA_QCFLAG_FAILED))
 		qc = NULL;
 
@@ -909,7 +909,7 @@ unsigned long ata_pci_default_filter(struct ata_device *adev, unsigned long xfer
 	/* Filter out DMA modes if the device has been configured by
 	   the BIOS as PIO only */
 
-	if (adev->ap->ioaddr.bmdma_addr == 0)
+	if (adev->link->ap->ioaddr.bmdma_addr == 0)
 		xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
 	return xfer_mask;
 }
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 5d8b91e70ec..ece1a28f0a4 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -391,7 +391,7 @@ static void it821x_passthru_dev_select(struct ata_port *ap,
 {
 	struct it821x_dev *itdev = ap->private_data;
 	if (itdev && device != itdev->last_device) {
-		struct ata_device *adev = &ap->device[device];
+		struct ata_device *adev = &ap->link.device[device];
 		it821x_program(ap, adev, itdev->pio[adev->devno]);
 		itdev->last_device = device;
 	}
@@ -464,7 +464,7 @@ static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused
 	int i;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 5dea3584c6c..3e2b8ce5fa3 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -31,7 +31,7 @@ static int ixp4xx_set_mode(struct ata_port *ap, struct ata_device **error)
 	int i;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 		if (ata_dev_enabled(dev)) {
 			ata_dev_printk(dev, KERN_INFO, "configured for PIO0\n");
 			dev->pio_mode = XFER_PIO_0;
@@ -49,7 +49,7 @@ static void ixp4xx_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
 	unsigned int i;
 	unsigned int words = buflen >> 1;
 	u16 *buf16 = (u16 *) buf;
-	struct ata_port *ap = adev->ap;
+	struct ata_port *ap = adev->link->ap;
 	void __iomem *mmio = ap->ioaddr.data_addr;
 	struct ixp4xx_pata_data *data = ap->host->dev->platform_data;
 
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index edffc25d2d3..4bcc0ae8d10 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -112,7 +112,7 @@ static int legacy_set_mode(struct ata_port *ap, struct ata_device **unused)
 	int i;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 		if (ata_dev_enabled(dev)) {
 			ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
 			dev->pio_mode = XFER_PIO_0;
@@ -256,7 +256,7 @@ static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
 
 static void pdc_data_xfer_vlb(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
 {
-	struct ata_port *ap = adev->ap;
+	struct ata_port *ap = adev->link->ap;
 	int slop = buflen & 3;
 	unsigned long flags;
 
diff --git a/drivers/ata/pata_optidma.c b/drivers/ata/pata_optidma.c
index f89bdfde16d..f8234d7fd82 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -340,8 +340,8 @@ static int optidma_set_mode(struct ata_port *ap, struct ata_device **r_failed)
 		pci_read_config_byte(pdev, 0x43, &r);
 
 		r &= (0x0F << nybble);
-		r |= (optidma_make_bits43(&ap->device[0]) +
-		     (optidma_make_bits43(&ap->device[0]) << 2)) << nybble;
+		r |= (optidma_make_bits43(&ap->link.device[0]) +
+		     (optidma_make_bits43(&ap->link.device[0]) << 2)) << nybble;
 		pci_write_config_byte(pdev, 0x43, r);
 	}
 	return rc;
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index 0f2b027624d..890f649ddcc 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -67,8 +67,8 @@ struct ata_pcmcia_info {
 
 static int pcmcia_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 {
-	struct ata_device *master = &ap->device[0];
-	struct ata_device *slave = &ap->device[1];
+	struct ata_device *master = &ap->link.device[0];
+	struct ata_device *slave = &ap->link.device[1];
 
 	if (!ata_dev_enabled(master) || !ata_dev_enabled(slave))
 		return ata_do_set_mode(ap, r_failed_dev);
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index bb64a986e8f..fa780509a1d 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -486,7 +486,7 @@ static int pdc2027x_set_mode(struct ata_port *ap, struct ata_device **r_failed)
 		return i;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 
 		if (ata_dev_enabled(dev)) {
 
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index 5086d03f2d7..e89656bffa8 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -35,7 +35,7 @@ static int pata_platform_set_mode(struct ata_port *ap, struct ata_device **unuse
 	int i;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index 1998c19e874..ec2206e820a 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -126,7 +126,7 @@ static unsigned int qdi_qc_issue_prot(struct ata_queued_cmd *qc)
 
 static void qdi_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
 {
-	struct ata_port *ap = adev->ap;
+	struct ata_port *ap = adev->link->ap;
 	int slop = buflen & 3;
 
 	if (ata_id_has_dword_io(adev->id)) {
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index 7632fcb070c..57363c0ce06 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -39,7 +39,7 @@ static int rz1000_set_mode(struct ata_port *ap, struct ata_device **unused)
 	int i;
 
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
+		struct ata_device *dev = &ap->link.device[i];
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index 2d048ef25a5..aab068fbb7b 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -785,7 +785,7 @@ static u8 scc_bmdma_status (struct ata_port *ap)
 static void scc_data_xfer (struct ata_device *adev, unsigned char *buf,
 			   unsigned int buflen, int write_data)
 {
-	struct ata_port *ap = adev->ap;
+	struct ata_port *ap = adev->link->ap;
 	unsigned int words = buflen >> 1;
 	unsigned int i;
 	u16 *buf16 = (u16 *) buf;
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index cce2834b2b6..9d6f81d52e1 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -84,7 +84,7 @@ static int sis_short_ata40(struct pci_dev *dev)
 
 static int sis_old_port_base(struct ata_device *adev)
 {
-	return  0x40 + (4 * adev->ap->port_no) +  (2 * adev->devno);
+	return  0x40 + (4 * adev->link->ap->port_no) +  (2 * adev->devno);
 }
 
 /**
diff --git a/drivers/ata/pata_winbond.c b/drivers/ata/pata_winbond.c
index 83abfeca405..c3757033007 100644
--- a/drivers/ata/pata_winbond.c
+++ b/drivers/ata/pata_winbond.c
@@ -94,7 +94,7 @@ static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
 
 static void winbond_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
 {
-	struct ata_port *ap = adev->ap;
+	struct ata_port *ap = adev->link->ap;
 	int slop = buflen & 3;
 
 	if (ata_id_has_dword_io(adev->id)) {
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index c95c1bf7df3..064a3b50560 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -485,7 +485,7 @@ static inline unsigned int adma_intr_pkt(struct ata_host *host)
 		pp = ap->private_data;
 		if (!pp || pp->state != adma_state_pkt)
 			continue;
-		qc = ata_qc_from_tag(ap, ap->active_tag);
+		qc = ata_qc_from_tag(ap, ap->link.active_tag);
 		if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
 			if (status & aPERR)
 				qc->err_mask |= AC_ERR_HOST_BUS;
@@ -500,7 +500,7 @@ static inline unsigned int adma_intr_pkt(struct ata_host *host)
 			if (!qc->err_mask)
 				ata_qc_complete(qc);
 			else {
-				struct ata_eh_info *ehi = &ap->eh_info;
+				struct ata_eh_info *ehi = &ap->link.eh_info;
 				ata_ehi_clear_desc(ehi);
 				ata_ehi_push_desc(ehi,
 					"ADMA-status 0x%02X", status);
@@ -529,7 +529,7 @@ static inline unsigned int adma_intr_mmio(struct ata_host *host)
 			struct adma_port_priv *pp = ap->private_data;
 			if (!pp || pp->state != adma_state_mmio)
 				continue;
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			qc = ata_qc_from_tag(ap, ap->link.active_tag);
 			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
 
 				/* check main status, clearing INTRQ */
@@ -545,7 +545,8 @@ static inline unsigned int adma_intr_mmio(struct ata_host *host)
 				if (!qc->err_mask)
 					ata_qc_complete(qc);
 				else {
-					struct ata_eh_info *ehi = &ap->eh_info;
+					struct ata_eh_info *ehi =
+						&ap->link.eh_info;
 					ata_ehi_clear_desc(ehi);
 					ata_ehi_push_desc(ehi,
 						"status 0x%02X", status);
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index fdbed8ecdfc..3c0ef7a2f2f 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -285,7 +285,7 @@ static void inic_irq_clear(struct ata_port *ap)
 static void inic_host_intr(struct ata_port *ap)
 {
 	void __iomem *port_base = inic_port_base(ap);
-	struct ata_eh_info *ehi = &ap->eh_info;
+	struct ata_eh_info *ehi = &ap->link.eh_info;
 	u8 irq_stat;
 
 	/* fetch and clear irq */
@@ -293,7 +293,8 @@ static void inic_host_intr(struct ata_port *ap)
 	writeb(irq_stat, port_base + PORT_IRQ_STAT);
 
 	if (likely(!(irq_stat & PIRQ_ERR))) {
-		struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
+		struct ata_queued_cmd *qc =
+			ata_qc_from_tag(ap, ap->link.active_tag);
 
 		if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
 			ata_chk_status(ap);	/* clear ATA interrupt */
@@ -421,7 +422,7 @@ static int inic_hardreset(struct ata_port *ap, unsigned int *class,
 {
 	void __iomem *port_base = inic_port_base(ap);
 	void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
-	const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context);
+	const unsigned long *timing = sata_ehc_deb_timing(&ap->link.eh_context);
 	u16 val;
 	int rc;
 
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index d9832e234e4..246e7c5fdce 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1415,7 +1415,7 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
 	struct mv_host_priv *hpriv = ap->host->private_data;
 	unsigned int edma_enabled = (pp->pp_flags & MV_PP_FLAG_EDMA_EN);
 	unsigned int action = 0, err_mask = 0;
-	struct ata_eh_info *ehi = &ap->eh_info;
+	struct ata_eh_info *ehi = &ap->link.eh_info;
 
 	ata_ehi_clear_desc(ehi);
 
@@ -1508,7 +1508,7 @@ static void mv_intr_pio(struct ata_port *ap)
 		return;
 
 	/* get active ATA command */
-	qc = ata_qc_from_tag(ap, ap->active_tag);
+	qc = ata_qc_from_tag(ap, ap->link.active_tag);
 	if (unlikely(!qc))			/* no active tag */
 		return;
 	if (qc->tf.flags & ATA_TFLAG_POLLING)	/* polling; we don't own qc */
@@ -1543,7 +1543,7 @@ static void mv_intr_edma(struct ata_port *ap)
 
 		/* 50xx: get active ATA command */
 		if (IS_GEN_I(hpriv))
-			tag = ap->active_tag;
+			tag = ap->link.active_tag;
 
 		/* Gen II/IIE: get active ATA command via tag, to enable
 		 * support for queueing.  this works transparently for
@@ -1646,7 +1646,7 @@ static void mv_host_intr(struct ata_host *host, u32 relevant, unsigned int hc)
 		if (unlikely(have_err_bits)) {
 			struct ata_queued_cmd *qc;
 
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			qc = ata_qc_from_tag(ap, ap->link.active_tag);
 			if (qc && (qc->tf.flags & ATA_TFLAG_POLLING))
 				continue;
 
@@ -1688,14 +1688,14 @@ static void mv_pci_error(struct ata_host *host, void __iomem *mmio)
 	for (i = 0; i < host->n_ports; i++) {
 		ap = host->ports[i];
 		if (!ata_port_offline(ap)) {
-			ehi = &ap->eh_info;
+			ehi = &ap->link.eh_info;
 			ata_ehi_clear_desc(ehi);
 			if (!printed++)
 				ata_ehi_push_desc(ehi,
 					"PCI err cause 0x%08x", err_cause);
 			err_mask = AC_ERR_HOST_BUS;
 			ehi->action = ATA_EH_HARDRESET;
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			qc = ata_qc_from_tag(ap, ap->link.active_tag);
 			if (qc)
 				qc->err_mask |= err_mask;
 			else
@@ -2269,7 +2269,7 @@ comreset_retry:
 static int mv_prereset(struct ata_port *ap, unsigned long deadline)
 {
 	struct mv_port_priv *pp	= ap->private_data;
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	int rc;
 
 	rc = mv_stop_dma(ap);
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 40dc7313985..df4d50dcffb 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -594,7 +594,7 @@ static int nv_adma_slave_config(struct scsi_device *sdev)
 		/* Not a proper libata device, ignore */
 		return rc;
 
-	if (ap->device[sdev->id].class == ATA_DEV_ATAPI) {
+	if (ap->link.device[sdev->id].class == ATA_DEV_ATAPI) {
 		/*
 		 * NVIDIA reports that ADMA mode does not support ATAPI commands.
 		 * Therefore ATAPI commands are sent through the legacy interface.
@@ -711,7 +711,7 @@ static int nv_adma_check_cpb(struct ata_port *ap, int cpb_num, int force_err)
 		     flags & (NV_CPB_RESP_ATA_ERR |
 			      NV_CPB_RESP_CMD_ERR |
 			      NV_CPB_RESP_CPB_ERR)))) {
-		struct ata_eh_info *ehi = &ap->eh_info;
+		struct ata_eh_info *ehi = &ap->link.eh_info;
 		int freeze = 0;
 
 		ata_ehi_clear_desc(ehi);
@@ -747,7 +747,7 @@ static int nv_adma_check_cpb(struct ata_port *ap, int cpb_num, int force_err)
 			DPRINTK("Completing qc from tag %d\n",cpb_num);
 			ata_qc_complete(qc);
 		} else {
-			struct ata_eh_info *ehi = &ap->eh_info;
+			struct ata_eh_info *ehi = &ap->link.eh_info;
 			/* Notifier bits set without a command may indicate the drive
 			   is misbehaving. Raise host state machine violation on this
 			   condition. */
@@ -764,7 +764,7 @@ static int nv_adma_check_cpb(struct ata_port *ap, int cpb_num, int force_err)
 
 static int nv_host_intr(struct ata_port *ap, u8 irq_stat)
 {
-	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
+	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
 
 	/* freeze if hotplugged */
 	if (unlikely(irq_stat & (NV_INT_ADDED | NV_INT_REMOVED))) {
@@ -817,7 +817,7 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
 			if (pp->flags & NV_ADMA_PORT_REGISTER_MODE) {
 				u8 irq_stat = readb(host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804)
 					>> (NV_INT_PORT_SHIFT * i);
-				if(ata_tag_valid(ap->active_tag))
+				if(ata_tag_valid(ap->link.active_tag))
 					/** NV_INT_DEV indication seems unreliable at times
 					    at least in ADMA mode. Force it on always when a
 					    command is active, to prevent losing interrupts. */
@@ -852,7 +852,7 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
 					       NV_ADMA_STAT_HOTUNPLUG |
 					       NV_ADMA_STAT_TIMEOUT |
 					       NV_ADMA_STAT_SERROR))) {
-				struct ata_eh_info *ehi = &ap->eh_info;
+				struct ata_eh_info *ehi = &ap->link.eh_info;
 
 				ata_ehi_clear_desc(ehi);
 				__ata_ehi_push_desc(ehi, "ADMA status 0x%08x: ", status );
@@ -879,10 +879,10 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
 				u32 check_commands;
 				int pos, error = 0;
 
-				if(ata_tag_valid(ap->active_tag))
-					check_commands = 1 << ap->active_tag;
+				if(ata_tag_valid(ap->link.active_tag))
+					check_commands = 1 << ap->link.active_tag;
 				else
-					check_commands = ap->sactive;
+					check_commands = ap->link.sactive;
 
 				/** Check CPBs for completed commands */
 				while ((pos = ffs(check_commands)) && !error) {
@@ -1333,7 +1333,7 @@ static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance)
 		    !(ap->flags & ATA_FLAG_DISABLED)) {
 			struct ata_queued_cmd *qc;
 
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			qc = ata_qc_from_tag(ap, ap->link.active_tag);
 			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
 				handled += ata_host_intr(ap, qc);
 			else
@@ -1485,7 +1485,7 @@ static void nv_adma_error_handler(struct ata_port *ap)
 		int i;
 		u16 tmp;
 
-		if(ata_tag_valid(ap->active_tag) || ap->sactive) {
+		if(ata_tag_valid(ap->link.active_tag) || ap->link.sactive) {
 			u32 notifier = readl(mmio + NV_ADMA_NOTIFIER);
 			u32 notifier_error = readl(mmio + NV_ADMA_NOTIFIER_ERROR);
 			u32 gen_ctl = readl(pp->gen_block + NV_ADMA_GEN_CTL);
@@ -1501,8 +1501,8 @@ static void nv_adma_error_handler(struct ata_port *ap)
 
 			for( i=0;i<NV_ADMA_MAX_CPBS;i++) {
 				struct nv_adma_cpb *cpb = &pp->cpb[i];
-				if( (ata_tag_valid(ap->active_tag) && i == ap->active_tag) ||
-				    ap->sactive & (1 << i) )
+				if( (ata_tag_valid(ap->link.active_tag) && i == ap->link.active_tag) ||
+				    ap->link.sactive & (1 << i) )
 					ata_port_printk(ap, KERN_ERR,
 						"CPB %d: ctl_flags 0x%x, resp_flags 0x%x\n",
 						i, cpb->ctl_flags, cpb->resp_flags);
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 25698cf0dce..620d0675d18 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -626,7 +626,7 @@ static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
 static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
 			   u32 port_status, u32 err_mask)
 {
-	struct ata_eh_info *ehi = &ap->eh_info;
+	struct ata_eh_info *ehi = &ap->link.eh_info;
 	unsigned int ac_err_mask = 0;
 
 	ata_ehi_clear_desc(ehi);
@@ -773,7 +773,7 @@ static irqreturn_t pdc_interrupt (int irq, void *dev_instance)
 		tmp = hotplug_status & (0x11 << ata_no);
 		if (tmp && ap &&
 		    !(ap->flags & ATA_FLAG_DISABLED)) {
-			struct ata_eh_info *ehi = &ap->eh_info;
+			struct ata_eh_info *ehi = &ap->link.eh_info;
 			ata_ehi_clear_desc(ehi);
 			ata_ehi_hotplugged(ehi);
 			ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp);
@@ -788,7 +788,7 @@ static irqreturn_t pdc_interrupt (int irq, void *dev_instance)
 		    !(ap->flags & ATA_FLAG_DISABLED)) {
 			struct ata_queued_cmd *qc;
 
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			qc = ata_qc_from_tag(ap, ap->link.active_tag);
 			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
 				handled += pdc_host_intr(ap, qc);
 		}
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 5e1dfdda698..ef1ad69c26e 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -404,7 +404,7 @@ static inline unsigned int qs_intr_pkt(struct ata_host *host)
 				struct qs_port_priv *pp = ap->private_data;
 				if (!pp || pp->state != qs_state_pkt)
 					continue;
-				qc = ata_qc_from_tag(ap, ap->active_tag);
+				qc = ata_qc_from_tag(ap, ap->link.active_tag);
 				if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
 					switch (sHST) {
 					case 0: /* successful CPB */
@@ -437,7 +437,7 @@ static inline unsigned int qs_intr_mmio(struct ata_host *host)
 			struct qs_port_priv *pp = ap->private_data;
 			if (!pp || pp->state != qs_state_mmio)
 				continue;
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			qc = ata_qc_from_tag(ap, ap->link.active_tag);
 			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
 
 				/* check main status, clearing INTRQ */
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 8c72e714b45..2ddbe4cc71e 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -312,7 +312,7 @@ static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed)
 		return rc;
 
 	for (i = 0; i < 2; i++) {
-		dev = &ap->device[i];
+		dev = &ap->link.device[i];
 		if (!ata_dev_enabled(dev))
 			dev_mode[i] = 0;	/* PIO0/1/2 */
 		else if (dev->flags & ATA_DFLAG_PIO)
@@ -374,8 +374,8 @@ static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 
 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
 {
-	struct ata_eh_info *ehi = &ap->eh_info;
-	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
+	struct ata_eh_info *ehi = &ap->link.eh_info;
+	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
 	u8 status;
 
 	if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
@@ -394,8 +394,8 @@ static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
 		 * repeat probing needlessly.
 		 */
 		if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
-			ata_ehi_hotplugged(&ap->eh_info);
-			ap->eh_info.serror |= serror;
+			ata_ehi_hotplugged(&ap->link.eh_info);
+			ap->link.eh_info.serror |= serror;
 		}
 
 		goto freeze;
@@ -562,8 +562,8 @@ static void sil_thaw(struct ata_port *ap)
  */
 static void sil_dev_config(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->ap;
-	int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO;
+	struct ata_port *ap = dev->link->ap;
+	int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
 	unsigned int n, quirks = 0;
 	unsigned char model_num[ATA_ID_PROD_LEN + 1];
 
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 233e8869339..2d8334e7921 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -456,7 +456,7 @@ static int sil24_tag(int tag)
 
 static void sil24_dev_config(struct ata_device *dev)
 {
-	void __iomem *port = dev->ap->ioaddr.cmd_addr;
+	void __iomem *port = dev->link->ap->ioaddr.cmd_addr;
 
 	if (dev->cdb_len == 16)
 		writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
@@ -609,7 +609,7 @@ static int sil24_do_softreset(struct ata_port *ap, unsigned int *class,
 	if (time_after(deadline, jiffies))
 		timeout_msec = jiffies_to_msecs(deadline - jiffies);
 
-	ata_tf_init(ap->device, &tf);	/* doesn't really matter */
+	ata_tf_init(ap->link.device, &tf);	/* doesn't really matter */
 	rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST,
 				   timeout_msec);
 	if (rc == -EBUSY) {
@@ -804,7 +804,7 @@ static void sil24_error_intr(struct ata_port *ap)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
 	struct sil24_port_priv *pp = ap->private_data;
-	struct ata_eh_info *ehi = &ap->eh_info;
+	struct ata_eh_info *ehi = &ap->link.eh_info;
 	int freeze = 0;
 	u32 irq_stat;
 
@@ -856,7 +856,7 @@ static void sil24_error_intr(struct ata_port *ap)
 		}
 
 		/* record error info */
-		qc = ata_qc_from_tag(ap, ap->active_tag);
+		qc = ata_qc_from_tag(ap, ap->link.active_tag);
 		if (qc) {
 			sil24_read_tf(ap, qc->tag, &pp->tf);
 			qc->err_mask |= err_mask;
@@ -910,7 +910,7 @@ static inline void sil24_host_intr(struct ata_port *ap)
 	if (rc > 0)
 		return;
 	if (rc < 0) {
-		struct ata_eh_info *ehi = &ap->eh_info;
+		struct ata_eh_info *ehi = &ap->link.eh_info;
 		ehi->err_mask |= AC_ERR_HSM;
 		ehi->action |= ATA_EH_SOFTRESET;
 		ata_port_freeze(ap);
@@ -921,7 +921,7 @@ static inline void sil24_host_intr(struct ata_port *ap)
 	if (!(ap->flags & SIL24_FLAG_PCIX_IRQ_WOC) && ata_ratelimit())
 		ata_port_printk(ap, KERN_INFO, "spurious interrupt "
 			"(slot_stat 0x%x active_tag %d sactive 0x%x)\n",
-			slot_stat, ap->active_tag, ap->sactive);
+			slot_stat, ap->link.active_tag, ap->link.sactive);
 }
 
 static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
@@ -963,7 +963,7 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
 
 static void sil24_error_handler(struct ata_port *ap)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 
 	if (sil24_init_port(ap)) {
 		ata_eh_freeze_port(ap);
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 97aefdd87be..12691f09193 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -854,7 +854,7 @@ static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance)
 		    !(ap->flags & ATA_FLAG_DISABLED)) {
 			struct ata_queued_cmd *qc;
 
-			qc = ata_qc_from_tag(ap, ap->active_tag);
+			qc = ata_qc_from_tag(ap, ap->link.active_tag);
 			if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
 				handled += pdc20621_host_intr(ap, qc, (i > 4),
 							      mmio_base);
@@ -881,7 +881,7 @@ static void pdc_eng_timeout(struct ata_port *ap)
 
 	spin_lock_irqsave(&host->lock, flags);
 
-	qc = ata_qc_from_tag(ap, ap->active_tag);
+	qc = ata_qc_from_tag(ap, ap->link.active_tag);
 
 	switch (qc->tf.protocol) {
 	case ATA_PROT_DMA:
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 57fd30de8f0..78a6833af71 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -296,7 +296,7 @@ static void svia_noop_freeze(struct ata_port *ap)
  */
 static int vt6420_prereset(struct ata_port *ap, unsigned long deadline)
 {
-	struct ata_eh_context *ehc = &ap->eh_context;
+	struct ata_eh_context *ehc = &ap->link.eh_context;
 	unsigned long timeout = jiffies + (HZ * 5);
 	u32 sstatus, scontrol;
 	int online;
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index 1920915dfa2..9586b8b51ce 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -240,7 +240,7 @@ static void vsc_port_intr(u8 port_status, struct ata_port *ap)
 		return;
 	}
 
-	qc = ata_qc_from_tag(ap, ap->active_tag);
+	qc = ata_qc_from_tag(ap, ap->link.active_tag);
 	if (qc && likely(!(qc->tf.flags & ATA_TFLAG_POLLING)))
 		handled = ata_host_intr(ap, qc);
 
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index f142eafb6fc..affd77aafb2 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -4988,14 +4988,14 @@ static void ipr_ata_phy_reset(struct ata_port *ap)
 	switch(res->cfgte.proto) {
 	case IPR_PROTO_SATA:
 	case IPR_PROTO_SAS_STP:
-		ap->device[0].class = ATA_DEV_ATA;
+		ap->link.device[0].class = ATA_DEV_ATA;
 		break;
 	case IPR_PROTO_SATA_ATAPI:
 	case IPR_PROTO_SAS_STP_ATAPI:
-		ap->device[0].class = ATA_DEV_ATAPI;
+		ap->link.device[0].class = ATA_DEV_ATAPI;
 		break;
 	default:
-		ap->device[0].class = ATA_DEV_UNKNOWN;
+		ap->link.device[0].class = ATA_DEV_UNKNOWN;
 		ap->ops->port_disable(ap);
 		break;
 	};
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 5e573efcf0a..1d6503d85f0 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -249,17 +249,17 @@ static void sas_ata_phy_reset(struct ata_port *ap)
 	switch (dev->sata_dev.command_set) {
 		case ATA_COMMAND_SET:
 			SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
-			ap->device[0].class = ATA_DEV_ATA;
+			ap->link.device[0].class = ATA_DEV_ATA;
 			break;
 		case ATAPI_COMMAND_SET:
 			SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
-			ap->device[0].class = ATA_DEV_ATAPI;
+			ap->link.device[0].class = ATA_DEV_ATAPI;
 			break;
 		default:
 			SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
 				    __FUNCTION__,
 				    dev->sata_dev.command_set);
-			ap->device[0].class = ATA_DEV_UNKNOWN;
+			ap->link.device[0].class = ATA_DEV_UNKNOWN;
 			break;
 	}
 
@@ -317,7 +317,7 @@ static int sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
 			dev->sata_dev.serror = val;
 			break;
 		case SCR_ACTIVE:
-			dev->sata_dev.ap->sactive = val;
+			dev->sata_dev.ap->link.sactive = val;
 			break;
 		default:
 			return -EINVAL;
@@ -342,7 +342,7 @@ static int sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in,
 			*val = dev->sata_dev.serror;
 			return 0;
 		case SCR_ACTIVE:
-			*val = dev->sata_dev.ap->sactive;
+			*val = dev->sata_dev.ap->link.sactive;
 			return 0;
 		default:
 			return -EINVAL;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index a67bb9075e9..ca4493125fa 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -436,7 +436,7 @@ struct ata_ering {
 };
 
 struct ata_device {
-	struct ata_port		*ap;
+	struct ata_link		*link;
 	unsigned int		devno;		/* 0 or 1 */
 	unsigned long		flags;		/* ATA_DFLAG_xxx */
 	unsigned int		horkage;	/* List of broken features */
@@ -510,6 +510,24 @@ struct ata_acpi_gtm {
 	u32 flags;
 } __packed;
 
+struct ata_link {
+	struct ata_port		*ap;
+
+	unsigned int		active_tag;	/* active tag on this link */
+	u32			sactive;	/* active NCQ commands */
+
+	unsigned int		hw_sata_spd_limit;
+	unsigned int		sata_spd_limit;
+	unsigned int		sata_spd;	/* current SATA PHY speed */
+
+	/* record runtime error info, protected by host_set lock */
+	struct ata_eh_info	eh_info;
+	/* EH context */
+	struct ata_eh_context	eh_context;
+
+	struct ata_device	device[ATA_MAX_DEVICES];
+};
+
 struct ata_port {
 	struct Scsi_Host	*scsi_host; /* our co-allocated scsi host */
 	const struct ata_port_operations *ops;
@@ -533,23 +551,12 @@ struct ata_port {
 	unsigned int		mwdma_mask;
 	unsigned int		udma_mask;
 	unsigned int		cbl;	/* cable type; ATA_CBL_xxx */
-	unsigned int		hw_sata_spd_limit;
-	unsigned int		sata_spd_limit;	/* SATA PHY speed limit */
-	unsigned int		sata_spd;	/* current SATA PHY speed */
-
-	/* record runtime error info, protected by host lock */
-	struct ata_eh_info	eh_info;
-	/* EH context owned by EH */
-	struct ata_eh_context	eh_context;
-
-	struct ata_device	device[ATA_MAX_DEVICES];
 
 	struct ata_queued_cmd	qcmd[ATA_MAX_QUEUE];
 	unsigned long		qc_allocated;
 	unsigned int		qc_active;
 
-	unsigned int		active_tag;
-	u32			sactive;
+	struct ata_link		link;	/* host default link */
 
 	struct ata_port_stats	stats;
 	struct ata_host		*host;
@@ -912,8 +919,11 @@ extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
 #define ata_port_printk(ap, lv, fmt, args...) \
 	printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
 
+#define ata_link_printk(link, lv, fmt, args...) \
+	printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args)
+
 #define ata_dev_printk(dev, lv, fmt, args...) \
-	printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args)
+	printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, (dev)->devno , ##args)
 
 /*
  * ata_eh_info helpers
@@ -1149,7 +1159,7 @@ static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
 {
 	memset(tf, 0, sizeof(*tf));
 
-	tf->ctl = dev->ap->ctl;
+	tf->ctl = dev->link->ap->ctl;
 	if (dev->devno == 0)
 		tf->device = ATA_DEVICE_OBS;
 	else
-- 
cgit v1.2.3-70-g09d2


From f58229f8060055b08b34008ea08f31de1e2f003c Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: implement and use link/device iterators

Multiple links and different number of devices per link should be
considered to iterate over links and devices.  This patch implements
and uses link and device iterators - ata_port_for_each_link() and
ata_link_for_each_dev() - and ata_link_max_devices().

This change makes a lot of functions iterate over only possible
devices instead of from dev 0 to dev ATA_MAX_DEVICES.  All such
changes have been examined and nothing should be broken.

While at it, add a separating comment before device helpers to
distinguish them better from link helpers and others.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_generic.c    |   7 ++-
 drivers/ata/libata-acpi.c    |   6 +--
 drivers/ata/libata-core.c    |  58 +++++++++------------
 drivers/ata/libata-eh.c      | 117 ++++++++++++++++++++++---------------------
 drivers/ata/libata-scsi.c    |  26 ++++------
 drivers/ata/pata_it821x.c    |   5 +-
 drivers/ata/pata_ixp4xx_cf.c |   5 +-
 drivers/ata/pata_legacy.c    |   5 +-
 drivers/ata/pata_pdc2027x.c  |  13 +++--
 drivers/ata/pata_platform.c  |   6 +--
 drivers/ata/pata_rz1000.c    |   5 +-
 drivers/ata/sata_sil.c       |  12 ++---
 include/linux/libata.h       |  17 +++++--
 13 files changed, 134 insertions(+), 148 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index b5e390ff5bd..44328a16075 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -46,21 +46,20 @@
 static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
 {
 	int dma_enabled = 0;
-	int i;
+	struct ata_device *dev;
 
 	/* Bits 5 and 6 indicate if DMA is active on master/slave */
 	if (ap->ioaddr.bmdma_addr)
 		dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
 			dev->dma_mode = XFER_MW_DMA_0;
 			/* We do need the right mode information for DMA or PIO
 			   and this comes from the current configuration flags */
-			if (dma_enabled & (1 << (5 + i))) {
+			if (dma_enabled & (1 << (5 + dev->devno))) {
 				ata_id_to_dma_mode(dev, XFER_MW_DMA_0);
 				dev->flags &= ~ATA_DFLAG_PIO;
 			} else {
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 0023ac4ff49..43af2e06d44 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -509,7 +509,7 @@ int ata_acpi_on_suspend(struct ata_port *ap)
  */
 void ata_acpi_on_resume(struct ata_port *ap)
 {
-	int i;
+	struct ata_device *dev;
 
 	if (ap->acpi_handle && (ap->pflags & ATA_PFLAG_GTM_VALID)) {
 		BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA);
@@ -519,8 +519,8 @@ void ata_acpi_on_resume(struct ata_port *ap)
 	}
 
 	/* schedule _GTF */
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		ap->link.device[i].flags |= ATA_DFLAG_ACPI_PENDING;
+	ata_link_for_each_dev(dev, &ap->link)
+		dev->flags |= ATA_DFLAG_ACPI_PENDING;
 }
 
 /**
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index dd2de485124..f30c4771b3a 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2105,21 +2105,19 @@ int ata_bus_probe(struct ata_port *ap)
 {
 	unsigned int classes[ATA_MAX_DEVICES];
 	int tries[ATA_MAX_DEVICES];
-	int i, rc;
+	int rc;
 	struct ata_device *dev;
 
 	ata_port_probe(ap);
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		tries[i] = ATA_PROBE_MAX_TRIES;
+	ata_link_for_each_dev(dev, &ap->link)
+		tries[dev->devno] = ATA_PROBE_MAX_TRIES;
 
  retry:
 	/* reset and determine device classes */
 	ap->ops->phy_reset(ap);
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->link.device[i];
-
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (!(ap->flags & ATA_FLAG_DISABLED) &&
 		    dev->class != ATA_DEV_UNKNOWN)
 			classes[dev->devno] = dev->class;
@@ -2134,18 +2132,16 @@ int ata_bus_probe(struct ata_port *ap)
 	/* after the reset the device state is PIO 0 and the controller
 	   state is undefined. Record the mode */
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		ap->link.device[i].pio_mode = XFER_PIO_0;
+	ata_link_for_each_dev(dev, &ap->link)
+		dev->pio_mode = XFER_PIO_0;
 
 	/* read IDENTIFY page and configure devices. We have to do the identify
 	   specific sequence bass-ackwards so that PDIAG- is released by
 	   the slave device */
 
-	for (i = ATA_MAX_DEVICES - 1; i >=  0; i--) {
-		dev = &ap->link.device[i];
-
-		if (tries[i])
-			dev->class = classes[i];
+	ata_link_for_each_dev(dev, &ap->link) {
+		if (tries[dev->devno])
+			dev->class = classes[dev->devno];
 
 		if (!ata_dev_enabled(dev))
 			continue;
@@ -2163,8 +2159,7 @@ int ata_bus_probe(struct ata_port *ap)
 	/* After the identify sequence we can now set up the devices. We do
 	   this in the normal order so that the user doesn't get confused */
 
-	for(i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (!ata_dev_enabled(dev))
 			continue;
 
@@ -2180,8 +2175,8 @@ int ata_bus_probe(struct ata_port *ap)
 	if (rc)
 		goto fail;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		if (ata_dev_enabled(&ap->link.device[i]))
+	ata_link_for_each_dev(dev, &ap->link)
+		if (ata_dev_enabled(dev))
 			return 0;
 
 	/* no device present, disable port */
@@ -2803,16 +2798,14 @@ static int ata_dev_set_mode(struct ata_device *dev)
 
 int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 {
+	struct ata_link *link = &ap->link;
 	struct ata_device *dev;
-	int i, rc = 0, used_dma = 0, found = 0;
-
+	int rc = 0, used_dma = 0, found = 0;
 
 	/* step 1: calculate xfer_mask */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
+	ata_link_for_each_dev(dev, link) {
 		unsigned int pio_mask, dma_mask;
 
-		dev = &ap->link.device[i];
-
 		if (!ata_dev_enabled(dev))
 			continue;
 
@@ -2831,8 +2824,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 		goto out;
 
 	/* step 2: always set host PIO timings */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, link) {
 		if (!ata_dev_enabled(dev))
 			continue;
 
@@ -2849,9 +2841,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 	}
 
 	/* step 3: set host DMA timings */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->link.device[i];
-
+	ata_link_for_each_dev(dev, link) {
 		if (!ata_dev_enabled(dev) || !dev->dma_mode)
 			continue;
 
@@ -2862,9 +2852,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 	}
 
 	/* step 4: update devices' xfer mode */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->link.device[i];
-
+	ata_link_for_each_dev(dev, link) {
 		/* don't update suspended devices' xfer mode */
 		if (!ata_dev_enabled(dev))
 			continue;
@@ -6113,6 +6101,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 
 	ap->link.ap = ap;
 
+	/* can't use iterator, ap isn't initialized yet */
 	for (i = 0; i < ATA_MAX_DEVICES; i++) {
 		struct ata_device *dev = &ap->link.device[i];
 		dev->link = &ap->link;
@@ -6453,7 +6442,8 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 			/* kick EH for boot probing */
 			spin_lock_irqsave(ap->lock, flags);
 
-			ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1;
+			ehi->probe_mask =
+				(1 << ata_link_max_devices(&ap->link)) - 1;
 			ehi->action |= ATA_EH_SOFTRESET;
 			ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
 
@@ -6551,7 +6541,7 @@ int ata_host_activate(struct ata_host *host, int irq,
 void ata_port_detach(struct ata_port *ap)
 {
 	unsigned long flags;
-	int i;
+	struct ata_device *dev;
 
 	if (!ap->ops->error_handler)
 		goto skip_eh;
@@ -6568,8 +6558,8 @@ void ata_port_detach(struct ata_port *ap)
 	 */
 	spin_lock_irqsave(ap->lock, flags);
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		ata_dev_disable(&ap->link.device[i]);
+	ata_link_for_each_dev(dev, &ap->link)
+		ata_dev_disable(dev);
 
 	spin_unlock_irqrestore(ap->lock, flags);
 
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index e2681f56ed4..8c37ec0bbf6 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -200,23 +200,24 @@ static unsigned int ata_eh_dev_action(struct ata_device *dev)
 	return ehc->i.action | ehc->i.dev_action[dev->devno];
 }
 
-static void ata_eh_clear_action(struct ata_device *dev,
+static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev,
 				struct ata_eh_info *ehi, unsigned int action)
 {
-	int i;
+	struct ata_device *tdev;
 
 	if (!dev) {
 		ehi->action &= ~action;
-		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			ehi->dev_action[i] &= ~action;
+		ata_link_for_each_dev(tdev, link)
+			ehi->dev_action[tdev->devno] &= ~action;
 	} else {
 		/* doesn't make sense for port-wide EH actions */
 		WARN_ON(!(action & ATA_EH_PERDEV_MASK));
 
 		/* break ehi->action into ehi->dev_action */
 		if (ehi->action & action) {
-			for (i = 0; i < ATA_MAX_DEVICES; i++)
-				ehi->dev_action[i] |= ehi->action & action;
+			ata_link_for_each_dev(tdev, link)
+				ehi->dev_action[tdev->devno] |=
+					ehi->action & action;
 			ehi->action &= ~action;
 		}
 
@@ -922,7 +923,8 @@ void ata_eh_qc_retry(struct ata_queued_cmd *qc)
  */
 static void ata_eh_detach_dev(struct ata_device *dev)
 {
-	struct ata_port *ap = dev->link->ap;
+	struct ata_link *link = dev->link;
+	struct ata_port *ap = link->ap;
 	unsigned long flags;
 
 	ata_dev_disable(dev);
@@ -937,8 +939,8 @@ static void ata_eh_detach_dev(struct ata_device *dev)
 	}
 
 	/* clear per-dev EH actions */
-	ata_eh_clear_action(dev, &dev->link->eh_info, ATA_EH_PERDEV_MASK);
-	ata_eh_clear_action(dev, &dev->link->eh_context.i, ATA_EH_PERDEV_MASK);
+	ata_eh_clear_action(link, dev, &link->eh_info, ATA_EH_PERDEV_MASK);
+	ata_eh_clear_action(link, dev, &link->eh_context.i, ATA_EH_PERDEV_MASK);
 
 	spin_unlock_irqrestore(ap->lock, flags);
 }
@@ -978,7 +980,7 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
 		ehi->flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
 	}
 
-	ata_eh_clear_action(dev, ehi, action);
+	ata_eh_clear_action(&ap->link, dev, ehi, action);
 
 	if (!(ehc->i.flags & ATA_EHI_QUIET))
 		ap->pflags |= ATA_PFLAG_RECOVERED;
@@ -1009,7 +1011,7 @@ static void ata_eh_done(struct ata_port *ap, struct ata_device *dev,
 		ehc->i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
 	}
 
-	ata_eh_clear_action(dev, &ehc->i, action);
+	ata_eh_clear_action(&ap->link, dev, &ehc->i, action);
 }
 
 /**
@@ -1736,10 +1738,11 @@ static void ata_eh_report(struct ata_port *ap)
 static int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
 			unsigned int *classes, unsigned long deadline)
 {
-	int i, rc;
+	struct ata_device *dev;
+	int rc;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		classes[i] = ATA_DEV_UNKNOWN;
+	ata_link_for_each_dev(dev, &ap->link)
+		classes[dev->devno] = ATA_DEV_UNKNOWN;
 
 	rc = reset(ap, classes, deadline);
 	if (rc)
@@ -1749,14 +1752,16 @@ static int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
 	 * is complete and convert all ATA_DEV_UNKNOWN to
 	 * ATA_DEV_NONE.
 	 */
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		if (classes[i] != ATA_DEV_UNKNOWN)
+	ata_link_for_each_dev(dev, &ap->link)
+		if (classes[dev->devno] != ATA_DEV_UNKNOWN)
 			break;
 
-	if (i < ATA_MAX_DEVICES)
-		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			if (classes[i] == ATA_DEV_UNKNOWN)
-				classes[i] = ATA_DEV_NONE;
+	if (dev) {
+		ata_link_for_each_dev(dev, &ap->link) {
+			if (classes[dev->devno] == ATA_DEV_UNKNOWN)
+				classes[dev->devno] = ATA_DEV_NONE;
+		}
+	}
 
 	return 0;
 }
@@ -1781,10 +1786,11 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 	unsigned int *classes = ehc->classes;
 	int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
 	int try = 0;
+	struct ata_device *dev;
 	unsigned long deadline;
 	unsigned int action;
 	ata_reset_fn_t reset;
-	int i, rc;
+	int rc;
 
 	/* about to reset */
 	ata_eh_about_to_do(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);
@@ -1808,8 +1814,8 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 						"port disabled. ignoring.\n");
 				ehc->i.action &= ~ATA_EH_RESET_MASK;
 
-				for (i = 0; i < ATA_MAX_DEVICES; i++)
-					classes[i] = ATA_DEV_NONE;
+				ata_link_for_each_dev(dev, &ap->link)
+					classes[dev->devno] = ATA_DEV_NONE;
 
 				rc = 0;
 			} else
@@ -1826,8 +1832,8 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		reset = softreset;
 	else {
 		/* prereset told us not to reset, bang classes and return */
-		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			classes[i] = ATA_DEV_NONE;
+		ata_link_for_each_dev(dev, &ap->link)
+			classes[dev->devno] = ATA_DEV_NONE;
 		rc = 0;
 		goto out;
 	}
@@ -1908,8 +1914,8 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		/* After the reset, the device state is PIO 0 and the
 		 * controller state is undefined.  Record the mode.
 		 */
-		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			ap->link.device[i].pio_mode = XFER_PIO_0;
+		ata_link_for_each_dev(dev, &ap->link)
+			dev->pio_mode = XFER_PIO_0;
 
 		/* record current link speed */
 		if (sata_scr_read(ap, SCR_STATUS, &sstatus) == 0)
@@ -1935,7 +1941,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	struct ata_device *dev;
 	unsigned int new_mask = 0;
 	unsigned long flags;
-	int i, rc = 0;
+	int rc = 0;
 
 	DPRINTK("ENTER\n");
 
@@ -1943,11 +1949,9 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	 * be done backwards such that PDIAG- is released by the slave
 	 * device before the master device is identified.
 	 */
-	for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) {
-		unsigned int action, readid_flags = 0;
-
-		dev = &ap->link.device[i];
-		action = ata_eh_dev_action(dev);
+	ata_link_for_each_dev_reverse(dev, &ap->link) {
+		unsigned int action = ata_eh_dev_action(dev);
+		unsigned int readid_flags = 0;
 
 		if (ehc->i.flags & ATA_EHI_DID_RESET)
 			readid_flags |= ATA_READID_POSTRESET;
@@ -1981,7 +1985,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 					     dev->id);
 			switch (rc) {
 			case 0:
-				new_mask |= 1 << i;
+				new_mask |= 1 << dev->devno;
 				break;
 			case -ENOENT:
 				/* IDENTIFY was issued to non-existent
@@ -2005,10 +2009,8 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	/* Configure new devices forward such that user doesn't see
 	 * device detection messages backwards.
 	 */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->link.device[i];
-
-		if (!(new_mask & (1 << i)))
+	ata_link_for_each_dev(dev, &ap->link) {
+		if (!(new_mask & (1 << dev->devno)))
 			continue;
 
 		ehc->i.flags |= ATA_EHI_PRINTINFO;
@@ -2035,20 +2037,22 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 
 static int ata_port_nr_enabled(struct ata_port *ap)
 {
-	int i, cnt = 0;
+	struct ata_device *dev;
+	int cnt = 0;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		if (ata_dev_enabled(&ap->link.device[i]))
+	ata_link_for_each_dev(dev, &ap->link)
+		if (ata_dev_enabled(dev))
 			cnt++;
 	return cnt;
 }
 
 static int ata_port_nr_vacant(struct ata_port *ap)
 {
-	int i, cnt = 0;
+	struct ata_device *dev;
+	int cnt = 0;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		if (ap->link.device[i].class == ATA_DEV_UNKNOWN)
+	ata_link_for_each_dev(dev, &ap->link)
+		if (dev->class == ATA_DEV_UNKNOWN)
 			cnt++;
 	return cnt;
 }
@@ -2056,7 +2060,7 @@ static int ata_port_nr_vacant(struct ata_port *ap)
 static int ata_eh_skip_recovery(struct ata_port *ap)
 {
 	struct ata_eh_context *ehc = &ap->link.eh_context;
-	int i;
+	struct ata_device *dev;
 
 	/* thaw frozen port, resume link and recover failed devices */
 	if ((ap->pflags & ATA_PFLAG_FROZEN) ||
@@ -2064,9 +2068,7 @@ static int ata_eh_skip_recovery(struct ata_port *ap)
 		return 0;
 
 	/* skip if class codes for all vacant slots are ATA_DEV_NONE */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
-
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (dev->class == ATA_DEV_UNKNOWN &&
 		    ehc->classes[dev->devno] != ATA_DEV_NONE)
 			return 0;
@@ -2153,19 +2155,18 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 {
 	struct ata_eh_context *ehc = &ap->link.eh_context;
 	struct ata_device *dev;
-	int i, rc;
+	int rc;
 
 	DPRINTK("ENTER\n");
 
 	/* prep for recovery */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->link.device[i];
-
+	ata_link_for_each_dev(dev, &ap->link) {
 		ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
 
 		/* collect port action mask recorded in dev actions */
-		ehc->i.action |= ehc->i.dev_action[i] & ~ATA_EH_PERDEV_MASK;
-		ehc->i.dev_action[i] &= ATA_EH_PERDEV_MASK;
+		ehc->i.action |=
+			ehc->i.dev_action[dev->devno] & ~ATA_EH_PERDEV_MASK;
+		ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK;
 
 		/* process hotplug request */
 		if (dev->flags & ATA_DFLAG_DETACH)
@@ -2192,8 +2193,8 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 	if (ata_eh_skip_recovery(ap))
 		ehc->i.action = 0;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++)
-		ehc->classes[i] = ATA_DEV_UNKNOWN;
+	ata_link_for_each_dev(dev, &ap->link)
+		ehc->classes[dev->devno] = ATA_DEV_UNKNOWN;
 
 	/* reset */
 	if (ehc->i.action & ATA_EH_RESET_MASK) {
@@ -2241,8 +2242,8 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 
  out:
 	if (rc) {
-		for (i = 0; i < ATA_MAX_DEVICES; i++)
-			ata_dev_disable(&ap->link.device[i]);
+		ata_link_for_each_dev(dev, &ap->link);
+			ata_dev_disable(dev);
 	}
 
 	DPRINTK("EXIT, rc=%d\n", rc);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index ec0e2638200..3d6d5f73799 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2425,7 +2425,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
 
 static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
 {
-	if (likely(id < ATA_MAX_DEVICES))
+	if (likely(id < ata_link_max_devices(&ap->link)))
 		return &ap->link.device[id];
 	return NULL;
 }
@@ -2952,21 +2952,18 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
 	int tries = 5;
 	struct ata_device *last_failed_dev = NULL;
 	struct ata_device *dev;
-	unsigned int i;
 
 	if (ap->flags & ATA_FLAG_DISABLED)
 		return;
 
  repeat:
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
+	ata_link_for_each_dev(dev, &ap->link) {
 		struct scsi_device *sdev;
 
-		dev = &ap->link.device[i];
-
 		if (!ata_dev_enabled(dev) || dev->sdev)
 			continue;
 
-		sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
+		sdev = __scsi_add_device(ap->scsi_host, 0, dev->devno, 0, NULL);
 		if (!IS_ERR(sdev)) {
 			dev->sdev = sdev;
 			scsi_device_put(sdev);
@@ -2977,12 +2974,11 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
 	 * failure occurred, scan would have failed silently.  Check
 	 * whether all devices are attached.
 	 */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (ata_dev_enabled(dev) && !dev->sdev)
 			break;
 	}
-	if (i == ATA_MAX_DEVICES)
+	if (!dev)
 		return;
 
 	/* we're missing some SCSI devices */
@@ -3112,7 +3108,7 @@ void ata_scsi_hotplug(struct work_struct *work)
 {
 	struct ata_port *ap =
 		container_of(work, struct ata_port, hotplug_task.work);
-	int i;
+	struct ata_device *dev;
 
 	if (ap->pflags & ATA_PFLAG_UNLOADING) {
 		DPRINTK("ENTER/EXIT - unloading\n");
@@ -3122,8 +3118,7 @@ void ata_scsi_hotplug(struct work_struct *work)
 	DPRINTK("ENTER\n");
 
 	/* unplug detached devices */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		unsigned long flags;
 
 		if (!(dev->flags & ATA_DFLAG_DETACHED))
@@ -3176,7 +3171,7 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 	spin_lock_irqsave(ap->lock, flags);
 
 	if (id == SCAN_WILD_CARD) {
-		ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
+		ehi->probe_mask |= (1 << ata_link_max_devices(&ap->link)) - 1;
 		ehi->action |= ATA_EH_SOFTRESET;
 	} else {
 		struct ata_device *dev = ata_find_dev(ap, id);
@@ -3215,13 +3210,12 @@ void ata_scsi_dev_rescan(struct work_struct *work)
 {
 	struct ata_port *ap =
 		container_of(work, struct ata_port, scsi_rescan_task);
+	struct ata_device *dev;
 	unsigned long flags;
-	unsigned int i;
 
 	spin_lock_irqsave(ap->lock, flags);
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		struct scsi_device *sdev = dev->sdev;
 
 		if (!ata_dev_enabled(dev) || !sdev)
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index ece1a28f0a4..088eb1d2376 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -461,10 +461,9 @@ static unsigned int it821x_passthru_qc_issue_prot(struct ata_queued_cmd *qc)
 
 static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused)
 {
-	int i;
+	struct ata_device *dev;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 3e2b8ce5fa3..7db315a9baa 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -28,10 +28,9 @@
 
 static int ixp4xx_set_mode(struct ata_port *ap, struct ata_device **error)
 {
-	int i;
+	struct ata_device *dev;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (ata_dev_enabled(dev)) {
 			ata_dev_printk(dev, KERN_INFO, "configured for PIO0\n");
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 4bcc0ae8d10..9d92843b033 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -109,10 +109,9 @@ static int iordy_mask = 0xFFFFFFFF;	/* Use iordy if available */
 
 static int legacy_set_mode(struct ata_port *ap, struct ata_device **unused)
 {
-	int i;
+	struct ata_device *dev;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (ata_dev_enabled(dev)) {
 			ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index fa780509a1d..83c90cabc7f 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -479,15 +479,14 @@ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  */
 static int pdc2027x_set_mode(struct ata_port *ap, struct ata_device **r_failed)
 {
-	int i;
-
-	i = ata_do_set_mode(ap, r_failed);
-	if (i < 0)
-		return i;
+	struct ata_device *dev;
+	int rc;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	rc = ata_do_set_mode(ap, r_failed);
+	if (rc < 0)
+		return rc;
 
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (ata_dev_enabled(dev)) {
 
 			pdc2027x_set_piomode(ap, dev);
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index e89656bffa8..ee1605bfc29 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -32,11 +32,9 @@ static int pio_mask = 1;
  */
 static int pata_platform_set_mode(struct ata_port *ap, struct ata_device **unused)
 {
-	int i;
-
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	struct ata_device *dev;
 
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index 57363c0ce06..300b3d5de81 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -36,10 +36,9 @@
 
 static int rz1000_set_mode(struct ata_port *ap, struct ata_device **unused)
 {
-	int i;
+	struct ata_device *dev;
 
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 2ddbe4cc71e..4c9295a49a4 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -303,22 +303,20 @@ static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed)
 	struct ata_device *dev;
 	void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
 	void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
-	u32 tmp, dev_mode[2];
-	unsigned int i;
+	u32 tmp, dev_mode[2] = { };
 	int rc;
 
 	rc = ata_do_set_mode(ap, r_failed);
 	if (rc)
 		return rc;
 
-	for (i = 0; i < 2; i++) {
-		dev = &ap->link.device[i];
+	ata_link_for_each_dev(dev, &ap->link) {
 		if (!ata_dev_enabled(dev))
-			dev_mode[i] = 0;	/* PIO0/1/2 */
+			dev_mode[dev->devno] = 0;	/* PIO0/1/2 */
 		else if (dev->flags & ATA_DFLAG_PIO)
-			dev_mode[i] = 1;	/* PIO3/4 */
+			dev_mode[dev->devno] = 1;	/* PIO3/4 */
 		else
-			dev_mode[i] = 3;	/* UDMA */
+			dev_mode[dev->devno] = 3;	/* UDMA */
 		/* value 2 indicates MDMA */
 	}
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index ca4493125fa..62fa8cf677a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1030,15 +1030,26 @@ static inline unsigned int ata_dev_absent(const struct ata_device *dev)
 }
 
 /*
- * port helpers
+ * link helpers
  */
-static inline int ata_port_max_devices(const struct ata_port *ap)
+static inline int ata_link_max_devices(const struct ata_link *link)
 {
-	if (ap->flags & ATA_FLAG_SLAVE_POSS)
+	if (link->ap->flags & ATA_FLAG_SLAVE_POSS)
 		return 2;
 	return 1;
 }
 
+#define ata_port_for_each_link(lk, ap) \
+	for ((lk) = &(ap)->link; (lk); (lk) = NULL)
+
+#define ata_link_for_each_dev(dev, link) \
+	for ((dev) = (link)->device; \
+	     (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
+	     (dev)++)
+
+#define ata_link_for_each_dev_reverse(dev, link) \
+	for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
+	     (dev) >= (link)->device || ((dev) = NULL); (dev)--)
 
 static inline u8 ata_chk_status(struct ata_port *ap)
 {
-- 
cgit v1.2.3-70-g09d2


From 936fd7328657884d5a69a55666c74a55aa83ca27 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: linkify PHY-related functions

Make the following PHY-related functions to deal with ata_link instead
of ata_port.

* sata_print_link_status()
* sata_down_spd_limit()
* ata_set_sata_spd_limit() and friends
* sata_link_debounce/resume()
* sata_scr_valid/read/write/write_flush()
* ata_link_on/offline()

This patch introduces no behavior change.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c          |   4 +-
 drivers/ata/libata-core.c   | 227 +++++++++++++++++++++++---------------------
 drivers/ata/libata-eh.c     |  31 +++---
 drivers/ata/libata-sff.c    |   2 +-
 drivers/ata/libata.h        |   4 +-
 drivers/ata/pata_scc.c      |   2 +-
 drivers/ata/sata_inic162x.c |   4 +-
 drivers/ata/sata_mv.c       |  26 ++---
 drivers/ata/sata_promise.c  |   4 +-
 drivers/ata/sata_sil24.c    |  10 +-
 include/linux/libata.h      |  24 ++---
 11 files changed, 177 insertions(+), 161 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index c72fa468a69..6e5f69a3a0c 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1052,7 +1052,7 @@ static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
 
 	DPRINTK("ENTER\n");
 
-	if (ata_port_offline(ap)) {
+	if (ata_link_offline(&ap->link)) {
 		DPRINTK("PHY reports no device\n");
 		*class = ATA_DEV_NONE;
 		return 0;
@@ -1140,7 +1140,7 @@ static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
 
 	ahci_start_engine(ap);
 
-	if (rc == 0 && ata_port_online(ap))
+	if (rc == 0 && ata_link_online(&ap->link))
 		*class = ahci_dev_classify(ap);
 	if (*class == ATA_DEV_UNKNOWN)
 		*class = ATA_DEV_NONE;
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index f30c4771b3a..6f99dee6b6d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2201,7 +2201,7 @@ int ata_bus_probe(struct ata_port *ap)
 			/* This is the last chance, better to slow
 			 * down than lose it.
 			 */
-			sata_down_spd_limit(ap);
+			sata_down_spd_limit(&ap->link);
 			ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
 		}
 	}
@@ -2230,28 +2230,28 @@ void ata_port_probe(struct ata_port *ap)
 
 /**
  *	sata_print_link_status - Print SATA link status
- *	@ap: SATA port to printk link status about
+ *	@link: SATA link to printk link status about
  *
  *	This function prints link speed and status of a SATA link.
  *
  *	LOCKING:
  *	None.
  */
-void sata_print_link_status(struct ata_port *ap)
+void sata_print_link_status(struct ata_link *link)
 {
 	u32 sstatus, scontrol, tmp;
 
-	if (sata_scr_read(ap, SCR_STATUS, &sstatus))
+	if (sata_scr_read(link, SCR_STATUS, &sstatus))
 		return;
-	sata_scr_read(ap, SCR_CONTROL, &scontrol);
+	sata_scr_read(link, SCR_CONTROL, &scontrol);
 
-	if (ata_port_online(ap)) {
+	if (ata_link_online(link)) {
 		tmp = (sstatus >> 4) & 0xf;
-		ata_port_printk(ap, KERN_INFO,
+		ata_link_printk(link, KERN_INFO,
 				"SATA link up %s (SStatus %X SControl %X)\n",
 				sata_spd_string(tmp), sstatus, scontrol);
 	} else {
-		ata_port_printk(ap, KERN_INFO,
+		ata_link_printk(link, KERN_INFO,
 				"SATA link down (SStatus %X SControl %X)\n",
 				sstatus, scontrol);
 	}
@@ -2271,32 +2271,33 @@ void sata_print_link_status(struct ata_port *ap)
  */
 void __sata_phy_reset(struct ata_port *ap)
 {
-	u32 sstatus;
+	struct ata_link *link = &ap->link;
 	unsigned long timeout = jiffies + (HZ * 5);
+	u32 sstatus;
 
 	if (ap->flags & ATA_FLAG_SATA_RESET) {
 		/* issue phy wake/reset */
-		sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
+		sata_scr_write_flush(link, SCR_CONTROL, 0x301);
 		/* Couldn't find anything in SATA I/II specs, but
 		 * AHCI-1.1 10.4.2 says at least 1 ms. */
 		mdelay(1);
 	}
 	/* phy wake/clear reset */
-	sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
+	sata_scr_write_flush(link, SCR_CONTROL, 0x300);
 
 	/* wait for phy to become ready, if necessary */
 	do {
 		msleep(200);
-		sata_scr_read(ap, SCR_STATUS, &sstatus);
+		sata_scr_read(link, SCR_STATUS, &sstatus);
 		if ((sstatus & 0xf) != 1)
 			break;
 	} while (time_before(jiffies, timeout));
 
 	/* print link status */
-	sata_print_link_status(ap);
+	sata_print_link_status(link);
 
 	/* TODO: phy layer with polling, timeouts, etc. */
-	if (!ata_port_offline(ap))
+	if (!ata_link_offline(link))
 		ata_port_probe(ap);
 	else
 		ata_port_disable(ap);
@@ -2370,9 +2371,9 @@ void ata_port_disable(struct ata_port *ap)
 
 /**
  *	sata_down_spd_limit - adjust SATA spd limit downward
- *	@ap: Port to adjust SATA spd limit for
+ *	@link: Link to adjust SATA spd limit for
  *
- *	Adjust SATA spd limit of @ap downward.  Note that this
+ *	Adjust SATA spd limit of @link downward.  Note that this
  *	function only adjusts the limit.  The change must be applied
  *	using sata_set_spd().
  *
@@ -2382,24 +2383,24 @@ void ata_port_disable(struct ata_port *ap)
  *	RETURNS:
  *	0 on success, negative errno on failure
  */
-int sata_down_spd_limit(struct ata_port *ap)
+int sata_down_spd_limit(struct ata_link *link)
 {
 	u32 sstatus, spd, mask;
 	int rc, highbit;
 
-	if (!sata_scr_valid(ap))
+	if (!sata_scr_valid(link))
 		return -EOPNOTSUPP;
 
 	/* If SCR can be read, use it to determine the current SPD.
-	 * If not, use cached value in ap->sata_spd.
+	 * If not, use cached value in link->sata_spd.
 	 */
-	rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
+	rc = sata_scr_read(link, SCR_STATUS, &sstatus);
 	if (rc == 0)
 		spd = (sstatus >> 4) & 0xf;
 	else
-		spd = ap->link.sata_spd;
+		spd = link->sata_spd;
 
-	mask = ap->link.sata_spd_limit;
+	mask = link->sata_spd_limit;
 	if (mask <= 1)
 		return -EINVAL;
 
@@ -2419,22 +2420,22 @@ int sata_down_spd_limit(struct ata_port *ap)
 	if (!mask)
 		return -EINVAL;
 
-	ap->link.sata_spd_limit = mask;
+	link->sata_spd_limit = mask;
 
-	ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
+	ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
 			sata_spd_string(fls(mask)));
 
 	return 0;
 }
 
-static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
+static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
 {
 	u32 spd, limit;
 
-	if (ap->link.sata_spd_limit == UINT_MAX)
+	if (link->sata_spd_limit == UINT_MAX)
 		limit = 0;
 	else
-		limit = fls(ap->link.sata_spd_limit);
+		limit = fls(link->sata_spd_limit);
 
 	spd = (*scontrol >> 4) & 0xf;
 	*scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
@@ -2444,10 +2445,10 @@ static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
 
 /**
  *	sata_set_spd_needed - is SATA spd configuration needed
- *	@ap: Port in question
+ *	@link: Link in question
  *
  *	Test whether the spd limit in SControl matches
- *	@ap->link.sata_spd_limit.  This function is used to determine
+ *	@link->sata_spd_limit.  This function is used to determine
  *	whether hardreset is necessary to apply SATA spd
  *	configuration.
  *
@@ -2457,21 +2458,21 @@ static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
  *	RETURNS:
  *	1 if SATA spd configuration is needed, 0 otherwise.
  */
-int sata_set_spd_needed(struct ata_port *ap)
+int sata_set_spd_needed(struct ata_link *link)
 {
 	u32 scontrol;
 
-	if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
+	if (sata_scr_read(link, SCR_CONTROL, &scontrol))
 		return 0;
 
-	return __sata_set_spd_needed(ap, &scontrol);
+	return __sata_set_spd_needed(link, &scontrol);
 }
 
 /**
  *	sata_set_spd - set SATA spd according to spd limit
- *	@ap: Port to set SATA spd for
+ *	@link: Link to set SATA spd for
  *
- *	Set SATA spd of @ap according to sata_spd_limit.
+ *	Set SATA spd of @link according to sata_spd_limit.
  *
  *	LOCKING:
  *	Inherited from caller.
@@ -2480,18 +2481,18 @@ int sata_set_spd_needed(struct ata_port *ap)
  *	0 if spd doesn't need to be changed, 1 if spd has been
  *	changed.  Negative errno if SCR registers are inaccessible.
  */
-int sata_set_spd(struct ata_port *ap)
+int sata_set_spd(struct ata_link *link)
 {
 	u32 scontrol;
 	int rc;
 
-	if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
+	if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
 		return rc;
 
-	if (!__sata_set_spd_needed(ap, &scontrol))
+	if (!__sata_set_spd_needed(link, &scontrol))
 		return 0;
 
-	if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
+	if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
 		return rc;
 
 	return 1;
@@ -2997,7 +2998,7 @@ int ata_wait_ready(struct ata_port *ap, unsigned long deadline)
 
 		if (!(status & ATA_BUSY))
 			return 0;
-		if (!ata_port_online(ap) && status == 0xff)
+		if (!ata_link_online(&ap->link) && status == 0xff)
 			return -ENODEV;
 		if (time_after(now, deadline))
 			return -EBUSY;
@@ -3199,12 +3200,12 @@ err_out:
 }
 
 /**
- *	sata_phy_debounce - debounce SATA phy status
- *	@ap: ATA port to debounce SATA phy status for
+ *	sata_link_debounce - debounce SATA phy status
+ *	@link: ATA link to debounce SATA phy status for
  *	@params: timing parameters { interval, duratinon, timeout } in msec
  *	@deadline: deadline jiffies for the operation
  *
- *	Make sure SStatus of @ap reaches stable state, determined by
+*	Make sure SStatus of @link reaches stable state, determined by
  *	holding the same value where DET is not 1 for @duration polled
  *	every @interval, before @timeout.  Timeout constraints the
  *	beginning of the stable state.  Because DET gets stuck at 1 on
@@ -3220,8 +3221,8 @@ err_out:
  *	RETURNS:
  *	0 on success, -errno on failure.
  */
-int sata_phy_debounce(struct ata_port *ap, const unsigned long *params,
-		      unsigned long deadline)
+int sata_link_debounce(struct ata_link *link, const unsigned long *params,
+		       unsigned long deadline)
 {
 	unsigned long interval_msec = params[0];
 	unsigned long duration = msecs_to_jiffies(params[1]);
@@ -3233,7 +3234,7 @@ int sata_phy_debounce(struct ata_port *ap, const unsigned long *params,
 	if (time_before(t, deadline))
 		deadline = t;
 
-	if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
+	if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
 		return rc;
 	cur &= 0xf;
 
@@ -3242,7 +3243,7 @@ int sata_phy_debounce(struct ata_port *ap, const unsigned long *params,
 
 	while (1) {
 		msleep(interval_msec);
-		if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
+		if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
 			return rc;
 		cur &= 0xf;
 
@@ -3268,12 +3269,12 @@ int sata_phy_debounce(struct ata_port *ap, const unsigned long *params,
 }
 
 /**
- *	sata_phy_resume - resume SATA phy
- *	@ap: ATA port to resume SATA phy for
+ *	sata_link_resume - resume SATA link
+ *	@link: ATA link to resume SATA
  *	@params: timing parameters { interval, duratinon, timeout } in msec
  *	@deadline: deadline jiffies for the operation
  *
- *	Resume SATA phy of @ap and debounce it.
+ *	Resume SATA phy @link and debounce it.
  *
  *	LOCKING:
  *	Kernel thread context (may sleep)
@@ -3281,18 +3282,18 @@ int sata_phy_debounce(struct ata_port *ap, const unsigned long *params,
  *	RETURNS:
  *	0 on success, -errno on failure.
  */
-int sata_phy_resume(struct ata_port *ap, const unsigned long *params,
-		    unsigned long deadline)
+int sata_link_resume(struct ata_link *link, const unsigned long *params,
+		     unsigned long deadline)
 {
 	u32 scontrol;
 	int rc;
 
-	if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
+	if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
 		return rc;
 
 	scontrol = (scontrol & 0x0f0) | 0x300;
 
-	if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
+	if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
 		return rc;
 
 	/* Some PHYs react badly if SStatus is pounded immediately
@@ -3300,7 +3301,7 @@ int sata_phy_resume(struct ata_port *ap, const unsigned long *params,
 	 */
 	msleep(200);
 
-	return sata_phy_debounce(ap, params, deadline);
+	return sata_link_debounce(link, params, deadline);
 }
 
 /**
@@ -3322,7 +3323,8 @@ int sata_phy_resume(struct ata_port *ap, const unsigned long *params,
  */
 int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_link *link = &ap->link;
+	struct ata_eh_context *ehc = &link->eh_context;
 	const unsigned long *timing = sata_ehc_deb_timing(ehc);
 	int rc;
 
@@ -3335,9 +3337,9 @@ int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
 	if (ehc->i.action & ATA_EH_HARDRESET)
 		return 0;
 
-	/* if SATA, resume phy */
+	/* if SATA, resume link */
 	if (ap->flags & ATA_FLAG_SATA) {
-		rc = sata_phy_resume(ap, timing, deadline);
+		rc = sata_link_resume(link, timing, deadline);
 		/* whine about phy resume failure but proceed */
 		if (rc && rc != -EOPNOTSUPP)
 			ata_port_printk(ap, KERN_WARNING, "failed to resume "
@@ -3347,7 +3349,7 @@ int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
 	/* Wait for !BSY if the controller can wait for the first D2H
 	 * Reg FIS and we don't know that no device is attached.
 	 */
-	if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) {
+	if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
 		rc = ata_wait_ready(ap, deadline);
 		if (rc && rc != -ENODEV) {
 			ata_port_printk(ap, KERN_WARNING, "device not ready "
@@ -3376,6 +3378,7 @@ int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
 int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
 		      unsigned long deadline)
 {
+	struct ata_link *link = &ap->link;
 	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
 	unsigned int devmask = 0;
 	int rc;
@@ -3383,7 +3386,7 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
 
 	DPRINTK("ENTER\n");
 
-	if (ata_port_offline(ap)) {
+	if (ata_link_offline(link)) {
 		classes[0] = ATA_DEV_NONE;
 		goto out;
 	}
@@ -3401,7 +3404,7 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
 	DPRINTK("about to softreset, devmask=%x\n", devmask);
 	rc = ata_bus_softreset(ap, devmask, deadline);
 	/* if link is occupied, -ENODEV too is an error */
-	if (rc && (rc != -ENODEV || sata_scr_valid(ap))) {
+	if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
 		ata_port_printk(ap, KERN_ERR, "SRST failed (errno=%d)\n", rc);
 		return rc;
 	}
@@ -3433,35 +3436,36 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
 int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
 			unsigned long deadline)
 {
+	struct ata_link *link = &ap->link;
 	u32 scontrol;
 	int rc;
 
 	DPRINTK("ENTER\n");
 
-	if (sata_set_spd_needed(ap)) {
+	if (sata_set_spd_needed(link)) {
 		/* SATA spec says nothing about how to reconfigure
 		 * spd.  To be on the safe side, turn off phy during
 		 * reconfiguration.  This works for at least ICH7 AHCI
 		 * and Sil3124.
 		 */
-		if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
+		if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
 			goto out;
 
 		scontrol = (scontrol & 0x0f0) | 0x304;
 
-		if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
+		if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
 			goto out;
 
-		sata_set_spd(ap);
+		sata_set_spd(link);
 	}
 
 	/* issue phy wake/reset */
-	if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
+	if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
 		goto out;
 
 	scontrol = (scontrol & 0x0f0) | 0x301;
 
-	if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
+	if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
 		goto out;
 
 	/* Couldn't find anything in SATA I/II specs, but AHCI-1.1
@@ -3469,8 +3473,8 @@ int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
 	 */
 	msleep(1);
 
-	/* bring phy back */
-	rc = sata_phy_resume(ap, timing, deadline);
+	/* bring link back */
+	rc = sata_link_resume(link, timing, deadline);
  out:
 	DPRINTK("EXIT, rc=%d\n", rc);
 	return rc;
@@ -3494,7 +3498,8 @@ int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
 int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
 		       unsigned long deadline)
 {
-	const unsigned long *timing = sata_ehc_deb_timing(&ap->link.eh_context);
+	struct ata_link *link = &ap->link;
+	const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
 	int rc;
 
 	DPRINTK("ENTER\n");
@@ -3508,7 +3513,7 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
 	}
 
 	/* TODO: phy layer with polling, timeouts, etc. */
-	if (ata_port_offline(ap)) {
+	if (ata_link_offline(link)) {
 		*class = ATA_DEV_NONE;
 		DPRINTK("EXIT, link offline\n");
 		return 0;
@@ -3547,16 +3552,17 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
  */
 void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
 {
+	struct ata_link *link = &ap->link;
 	u32 serror;
 
 	DPRINTK("ENTER\n");
 
 	/* print link status */
-	sata_print_link_status(ap);
+	sata_print_link_status(link);
 
 	/* clear SError */
-	if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
-		sata_scr_write(ap, SCR_ERROR, serror);
+	if (sata_scr_read(link, SCR_ERROR, &serror) == 0)
+		sata_scr_write(link, SCR_ERROR, serror);
 
 	/* is double-select really necessary? */
 	if (classes[0] != ATA_DEV_NONE)
@@ -5729,9 +5735,9 @@ irqreturn_t ata_interrupt (int irq, void *dev_instance)
 
 /**
  *	sata_scr_valid - test whether SCRs are accessible
- *	@ap: ATA port to test SCR accessibility for
+ *	@link: ATA link to test SCR accessibility for
  *
- *	Test whether SCRs are accessible for @ap.
+ *	Test whether SCRs are accessible for @link.
  *
  *	LOCKING:
  *	None.
@@ -5739,18 +5745,20 @@ irqreturn_t ata_interrupt (int irq, void *dev_instance)
  *	RETURNS:
  *	1 if SCRs are accessible, 0 otherwise.
  */
-int sata_scr_valid(struct ata_port *ap)
+int sata_scr_valid(struct ata_link *link)
 {
+	struct ata_port *ap = link->ap;
+
 	return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
 }
 
 /**
  *	sata_scr_read - read SCR register of the specified port
- *	@ap: ATA port to read SCR for
+ *	@link: ATA link to read SCR for
  *	@reg: SCR to read
  *	@val: Place to store read value
  *
- *	Read SCR register @reg of @ap into *@val.  This function is
+ *	Read SCR register @reg of @link into *@val.  This function is
  *	guaranteed to succeed if the cable type of the port is SATA
  *	and the port implements ->scr_read.
  *
@@ -5760,20 +5768,22 @@ int sata_scr_valid(struct ata_port *ap)
  *	RETURNS:
  *	0 on success, negative errno on failure.
  */
-int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
+int sata_scr_read(struct ata_link *link, int reg, u32 *val)
 {
-	if (sata_scr_valid(ap))
+	struct ata_port *ap = link->ap;
+
+	if (sata_scr_valid(link))
 		return ap->ops->scr_read(ap, reg, val);
 	return -EOPNOTSUPP;
 }
 
 /**
  *	sata_scr_write - write SCR register of the specified port
- *	@ap: ATA port to write SCR for
+ *	@link: ATA link to write SCR for
  *	@reg: SCR to write
  *	@val: value to write
  *
- *	Write @val to SCR register @reg of @ap.  This function is
+ *	Write @val to SCR register @reg of @link.  This function is
  *	guaranteed to succeed if the cable type of the port is SATA
  *	and the port implements ->scr_read.
  *
@@ -5783,16 +5793,18 @@ int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
  *	RETURNS:
  *	0 on success, negative errno on failure.
  */
-int sata_scr_write(struct ata_port *ap, int reg, u32 val)
+int sata_scr_write(struct ata_link *link, int reg, u32 val)
 {
-	if (sata_scr_valid(ap))
+	struct ata_port *ap = link->ap;
+
+	if (sata_scr_valid(link))
 		return ap->ops->scr_write(ap, reg, val);
 	return -EOPNOTSUPP;
 }
 
 /**
  *	sata_scr_write_flush - write SCR register of the specified port and flush
- *	@ap: ATA port to write SCR for
+ *	@link: ATA link to write SCR for
  *	@reg: SCR to write
  *	@val: value to write
  *
@@ -5805,11 +5817,12 @@ int sata_scr_write(struct ata_port *ap, int reg, u32 val)
  *	RETURNS:
  *	0 on success, negative errno on failure.
  */
-int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
+int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
 {
+	struct ata_port *ap = link->ap;
 	int rc;
 
-	if (sata_scr_valid(ap)) {
+	if (sata_scr_valid(link)) {
 		rc = ap->ops->scr_write(ap, reg, val);
 		if (rc == 0)
 			rc = ap->ops->scr_read(ap, reg, &val);
@@ -5819,12 +5832,12 @@ int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
 }
 
 /**
- *	ata_port_online - test whether the given port is online
- *	@ap: ATA port to test
+ *	ata_link_online - test whether the given link is online
+ *	@link: ATA link to test
  *
- *	Test whether @ap is online.  Note that this function returns 0
- *	if online status of @ap cannot be obtained, so
- *	ata_port_online(ap) != !ata_port_offline(ap).
+ *	Test whether @link is online.  Note that this function returns
+ *	0 if online status of @link cannot be obtained, so
+ *	ata_link_online(link) != !ata_link_offline(link).
  *
  *	LOCKING:
  *	None.
@@ -5832,22 +5845,23 @@ int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
  *	RETURNS:
  *	1 if the port online status is available and online.
  */
-int ata_port_online(struct ata_port *ap)
+int ata_link_online(struct ata_link *link)
 {
 	u32 sstatus;
 
-	if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
+	if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
+	    (sstatus & 0xf) == 0x3)
 		return 1;
 	return 0;
 }
 
 /**
- *	ata_port_offline - test whether the given port is offline
- *	@ap: ATA port to test
+ *	ata_link_offline - test whether the given link is offline
+ *	@link: ATA link to test
  *
- *	Test whether @ap is offline.  Note that this function returns
- *	0 if offline status of @ap cannot be obtained, so
- *	ata_port_online(ap) != !ata_port_offline(ap).
+ *	Test whether @link is offline.  Note that this function
+ *	returns 0 if offline status of @link cannot be obtained, so
+ *	ata_link_online(link) != !ata_link_offline(link).
  *
  *	LOCKING:
  *	None.
@@ -5855,11 +5869,12 @@ int ata_port_online(struct ata_port *ap)
  *	RETURNS:
  *	1 if the port offline status is available and offline.
  */
-int ata_port_offline(struct ata_port *ap)
+int ata_link_offline(struct ata_link *link)
 {
 	u32 sstatus;
 
-	if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
+	if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
+	    (sstatus & 0xf) != 0x3)
 		return 1;
 	return 0;
 }
@@ -6397,7 +6412,7 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 			ap->cbl = ATA_CBL_SATA;
 
 		/* init sata_spd_limit to the current value */
-		if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
+		if (sata_scr_read(&ap->link, SCR_CONTROL, &scontrol) == 0) {
 			int spd = (scontrol >> 4) & 0xf;
 			if (spd)
 				ap->link.hw_sata_spd_limit &= (1 << spd) - 1;
@@ -6924,8 +6939,8 @@ EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
 EXPORT_SYMBOL_GPL(ata_port_probe);
 EXPORT_SYMBOL_GPL(ata_dev_disable);
 EXPORT_SYMBOL_GPL(sata_set_spd);
-EXPORT_SYMBOL_GPL(sata_phy_debounce);
-EXPORT_SYMBOL_GPL(sata_phy_resume);
+EXPORT_SYMBOL_GPL(sata_link_debounce);
+EXPORT_SYMBOL_GPL(sata_link_resume);
 EXPORT_SYMBOL_GPL(sata_phy_reset);
 EXPORT_SYMBOL_GPL(__sata_phy_reset);
 EXPORT_SYMBOL_GPL(ata_bus_reset);
@@ -6952,8 +6967,8 @@ EXPORT_SYMBOL_GPL(sata_scr_valid);
 EXPORT_SYMBOL_GPL(sata_scr_read);
 EXPORT_SYMBOL_GPL(sata_scr_write);
 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
-EXPORT_SYMBOL_GPL(ata_port_online);
-EXPORT_SYMBOL_GPL(ata_port_offline);
+EXPORT_SYMBOL_GPL(ata_link_online);
+EXPORT_SYMBOL_GPL(ata_link_offline);
 #ifdef CONFIG_PM
 EXPORT_SYMBOL_GPL(ata_host_suspend);
 EXPORT_SYMBOL_GPL(ata_host_resume);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 8c37ec0bbf6..48ca68b3979 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1501,7 +1501,7 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
 	/* speed down? */
 	if (verdict & ATA_EH_SPDN_SPEED_DOWN) {
 		/* speed down SATA link speed if possible */
-		if (sata_down_spd_limit(dev->link->ap) == 0) {
+		if (sata_down_spd_limit(dev->link) == 0) {
 			action |= ATA_EH_HARDRESET;
 			goto done;
 		}
@@ -1561,7 +1561,8 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
  */
 static void ata_eh_autopsy(struct ata_port *ap)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_link *link = &ap->link;
+	struct ata_eh_context *ehc = &link->eh_context;
 	unsigned int all_err_mask = 0;
 	int tag, is_io = 0;
 	u32 serror;
@@ -1573,7 +1574,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
 		return;
 
 	/* obtain and analyze SError */
-	rc = sata_scr_read(ap, SCR_ERROR, &serror);
+	rc = sata_scr_read(link, SCR_ERROR, &serror);
 	if (rc == 0) {
 		ehc->i.serror |= serror;
 		ata_eh_analyze_serror(ap);
@@ -1782,7 +1783,8 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 			ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_link *link = &ap->link;
+	struct ata_eh_context *ehc = &link->eh_context;
 	unsigned int *classes = ehc->classes;
 	int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
 	int try = 0;
@@ -1800,7 +1802,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 	 */
 	action = ehc->i.action;
 	ehc->i.action &= ~ATA_EH_RESET_MASK;
-	if (softreset && (!hardreset || (!sata_set_spd_needed(ap) &&
+	if (softreset && (!hardreset || (!sata_set_spd_needed(link) &&
 					 !(action & ATA_EH_HARDRESET))))
 		ehc->i.action |= ATA_EH_SOFTRESET;
 	else
@@ -1814,7 +1816,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 						"port disabled. ignoring.\n");
 				ehc->i.action &= ~ATA_EH_RESET_MASK;
 
-				ata_link_for_each_dev(dev, &ap->link)
+				ata_link_for_each_dev(dev, link)
 					classes[dev->devno] = ATA_DEV_NONE;
 
 				rc = 0;
@@ -1832,7 +1834,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		reset = softreset;
 	else {
 		/* prereset told us not to reset, bang classes and return */
-		ata_link_for_each_dev(dev, &ap->link)
+		ata_link_for_each_dev(dev, link)
 			classes[dev->devno] = ATA_DEV_NONE;
 		rc = 0;
 		goto out;
@@ -1902,7 +1904,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 
 		if (rc == -EPIPE ||
 		    try == ARRAY_SIZE(ata_eh_reset_timeouts) - 1)
-			sata_down_spd_limit(ap);
+			sata_down_spd_limit(link);
 		if (hardreset)
 			reset = hardreset;
 		goto retry;
@@ -1914,12 +1916,12 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		/* After the reset, the device state is PIO 0 and the
 		 * controller state is undefined.  Record the mode.
 		 */
-		ata_link_for_each_dev(dev, &ap->link)
+		ata_link_for_each_dev(dev, link)
 			dev->pio_mode = XFER_PIO_0;
 
 		/* record current link speed */
-		if (sata_scr_read(ap, SCR_STATUS, &sstatus) == 0)
-			ap->link.sata_spd = (sstatus >> 4) & 0xf;
+		if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0)
+			link->sata_spd = (sstatus >> 4) & 0xf;
 
 		if (postreset)
 			postreset(ap, classes);
@@ -1957,7 +1959,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 			readid_flags |= ATA_READID_POSTRESET;
 
 		if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) {
-			if (ata_port_offline(ap)) {
+			if (ata_link_offline(&ap->link)) {
 				rc = -EIO;
 				goto err;
 			}
@@ -2079,7 +2081,6 @@ static int ata_eh_skip_recovery(struct ata_port *ap)
 
 static void ata_eh_handle_dev_fail(struct ata_device *dev, int err)
 {
-	struct ata_port *ap = dev->link->ap;
 	struct ata_eh_context *ehc = &dev->link->eh_context;
 
 	ehc->tries[dev->devno]--;
@@ -2096,7 +2097,7 @@ static void ata_eh_handle_dev_fail(struct ata_device *dev, int err)
 			/* This is the last chance, better to slow
 			 * down than lose it.
 			 */
-			sata_down_spd_limit(ap);
+			sata_down_spd_limit(dev->link);
 			ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
 		}
 	}
@@ -2106,7 +2107,7 @@ static void ata_eh_handle_dev_fail(struct ata_device *dev, int err)
 		ata_dev_disable(dev);
 
 		/* detach if offline */
-		if (ata_port_offline(ap))
+		if (ata_link_offline(dev->link))
 			ata_eh_detach_dev(dev);
 
 		/* probe if requested */
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 2100cd61ed6..dd528dbd9cc 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -500,7 +500,7 @@ void ata_bmdma_error_handler(struct ata_port *ap)
 	ata_reset_fn_t hardreset;
 
 	hardreset = NULL;
-	if (sata_scr_valid(ap))
+	if (sata_scr_valid(&ap->link))
 		hardreset = sata_std_hardreset;
 
 	ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, hardreset,
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 564cd234c80..700843a9f30 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -78,8 +78,8 @@ extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
 extern int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags);
 extern int ata_dev_configure(struct ata_device *dev);
-extern int sata_down_spd_limit(struct ata_port *ap);
-extern int sata_set_spd_needed(struct ata_port *ap);
+extern int sata_down_spd_limit(struct ata_link *link);
+extern int sata_set_spd_needed(struct ata_link *link);
 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
 extern int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
 extern void ata_sg_clean(struct ata_queued_cmd *qc);
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index aab068fbb7b..63fe99a10cd 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -612,7 +612,7 @@ static int scc_std_softreset (struct ata_port *ap, unsigned int *classes,
 
 	DPRINTK("ENTER\n");
 
-	if (ata_port_offline(ap)) {
+	if (ata_link_offline(&ap->link)) {
 		classes[0] = ATA_DEV_NONE;
 		goto out;
 	}
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 3c0ef7a2f2f..f2b1bea934b 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -435,7 +435,7 @@ static int inic_hardreset(struct ata_port *ap, unsigned int *class,
 	msleep(1);
 	writew(val & ~IDMA_CTL_RST_ATA, idma_ctl);
 
-	rc = sata_phy_resume(ap, timing, deadline);
+	rc = sata_link_resume(&ap->link, timing, deadline);
 	if (rc) {
 		ata_port_printk(ap, KERN_WARNING, "failed to resume "
 				"link after reset (errno=%d)\n", rc);
@@ -443,7 +443,7 @@ static int inic_hardreset(struct ata_port *ap, unsigned int *class,
 	}
 
 	*class = ATA_DEV_NONE;
-	if (ata_port_online(ap)) {
+	if (ata_link_online(&ap->link)) {
 		struct ata_taskfile tf;
 
 		/* wait a while before checking status */
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 246e7c5fdce..8e63c60adaf 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -1423,8 +1423,8 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
 		/* just a guess: do we need to do this? should we
 		 * expand this, and do it in all cases?
 		 */
-		sata_scr_read(ap, SCR_ERROR, &serr);
-		sata_scr_write_flush(ap, SCR_ERROR, serr);
+		sata_scr_read(&ap->link, SCR_ERROR, &serr);
+		sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
 	}
 
 	edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
@@ -1468,8 +1468,8 @@ static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
 		}
 
 		if (edma_err_cause & EDMA_ERR_SERR) {
-			sata_scr_read(ap, SCR_ERROR, &serr);
-			sata_scr_write_flush(ap, SCR_ERROR, serr);
+			sata_scr_read(&ap->link, SCR_ERROR, &serr);
+			sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
 			err_mask = AC_ERR_ATA_BUS;
 			action |= ATA_EH_HARDRESET;
 		}
@@ -1687,7 +1687,7 @@ static void mv_pci_error(struct ata_host *host, void __iomem *mmio)
 
 	for (i = 0; i < host->n_ports; i++) {
 		ap = host->ports[i];
-		if (!ata_port_offline(ap)) {
+		if (!ata_link_offline(&ap->link)) {
 			ehi = &ap->link.eh_info;
 			ata_ehi_clear_desc(ehi);
 			if (!printed++)
@@ -2198,14 +2198,14 @@ static void mv_phy_reset(struct ata_port *ap, unsigned int *class,
 
 	/* Issue COMRESET via SControl */
 comreset_retry:
-	sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
+	sata_scr_write_flush(&ap->link, SCR_CONTROL, 0x301);
 	msleep(1);
 
-	sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
+	sata_scr_write_flush(&ap->link, SCR_CONTROL, 0x300);
 	msleep(20);
 
 	do {
-		sata_scr_read(ap, SCR_STATUS, &sstatus);
+		sata_scr_read(&ap->link, SCR_STATUS, &sstatus);
 		if (((sstatus & 0x3) == 3) || ((sstatus & 0x3) == 0))
 			break;
 
@@ -2230,7 +2230,7 @@ comreset_retry:
 	}
 #endif
 
-	if (ata_port_offline(ap)) {
+	if (ata_link_offline(&ap->link)) {
 		*class = ATA_DEV_NONE;
 		return;
 	}
@@ -2285,7 +2285,7 @@ static int mv_prereset(struct ata_port *ap, unsigned long deadline)
 	if (ehc->i.action & ATA_EH_HARDRESET)
 		return 0;
 
-	if (ata_port_online(ap))
+	if (ata_link_online(&ap->link))
 		rc = ata_wait_ready(ap, deadline);
 	else
 		rc = -ENODEV;
@@ -2313,11 +2313,11 @@ static void mv_postreset(struct ata_port *ap, unsigned int *classes)
 	u32 serr;
 
 	/* print link status */
-	sata_print_link_status(ap);
+	sata_print_link_status(&ap->link);
 
 	/* clear SError */
-	sata_scr_read(ap, SCR_ERROR, &serr);
-	sata_scr_write_flush(ap, SCR_ERROR, serr);
+	sata_scr_read(&ap->link, SCR_ERROR, &serr);
+	sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
 
 	/* bail out if no device is present */
 	if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 620d0675d18..c7238ce8354 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -475,7 +475,7 @@ static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
 	buf32[2] = 0;				/* no next-packet */
 
 	/* select drive */
-	if (sata_scr_valid(ap)) {
+	if (sata_scr_valid(&ap->link)) {
 		dev_sel = PDC_DEVICE_SATA;
 	} else {
 		dev_sel = ATA_DEVICE_OBS;
@@ -643,7 +643,7 @@ static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
 			   | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
 		ac_err_mask |= AC_ERR_HOST_BUS;
 
-	if (sata_scr_valid(ap)) {
+	if (sata_scr_valid(&ap->link)) {
 		u32 serror;
 
 		pdc_sata_scr_read(ap, SCR_ERROR, &serror);
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 2d8334e7921..0cd40d5215f 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -593,7 +593,7 @@ static int sil24_do_softreset(struct ata_port *ap, unsigned int *class,
 
 	DPRINTK("ENTER\n");
 
-	if (ata_port_offline(ap)) {
+	if (ata_link_offline(&ap->link)) {
 		DPRINTK("PHY reports no device\n");
 		*class = ATA_DEV_NONE;
 		goto out;
@@ -650,10 +650,10 @@ static int sil24_hardreset(struct ata_port *ap, unsigned int *class,
 	u32 tmp;
 
 	/* sil24 does the right thing(tm) without any protection */
-	sata_set_spd(ap);
+	sata_set_spd(&ap->link);
 
 	tout_msec = 100;
-	if (ata_port_online(ap))
+	if (ata_link_online(&ap->link))
 		tout_msec = 5000;
 
 	writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
@@ -663,14 +663,14 @@ static int sil24_hardreset(struct ata_port *ap, unsigned int *class,
 	/* SStatus oscillates between zero and valid status after
 	 * DEV_RST, debounce it.
 	 */
-	rc = sata_phy_debounce(ap, sata_deb_timing_long, deadline);
+	rc = sata_link_debounce(&ap->link, sata_deb_timing_long, deadline);
 	if (rc) {
 		reason = "PHY debouncing failed";
 		goto err;
 	}
 
 	if (tmp & PORT_CS_DEV_RST) {
-		if (ata_port_offline(ap))
+		if (ata_link_offline(&ap->link))
 			return 0;
 		reason = "link not ready";
 		goto err;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 62fa8cf677a..e7882ba63e7 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -696,16 +696,16 @@ static inline int ata_port_is_dummy(struct ata_port *ap)
 	return ap->ops == &ata_dummy_port_ops;
 }
 
-extern void sata_print_link_status(struct ata_port *ap);
+extern void sata_print_link_status(struct ata_link *link);
 extern void ata_port_probe(struct ata_port *);
 extern void __sata_phy_reset(struct ata_port *ap);
 extern void sata_phy_reset(struct ata_port *ap);
 extern void ata_bus_reset(struct ata_port *ap);
-extern int sata_set_spd(struct ata_port *ap);
-extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param,
-			     unsigned long deadline);
-extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param,
-			   unsigned long deadline);
+extern int sata_set_spd(struct ata_link *link);
+extern int sata_link_debounce(struct ata_link *link,
+			const unsigned long *params, unsigned long deadline);
+extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
+			    unsigned long deadline);
 extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline);
 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
 			     unsigned long deadline);
@@ -753,12 +753,12 @@ extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
 			    struct ata_port *ap);
 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
-extern int sata_scr_valid(struct ata_port *ap);
-extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
-extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
-extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
-extern int ata_port_online(struct ata_port *ap);
-extern int ata_port_offline(struct ata_port *ap);
+extern int sata_scr_valid(struct ata_link *link);
+extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
+extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
+extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
+extern int ata_link_online(struct ata_link *link);
+extern int ata_link_offline(struct ata_link *link);
 #ifdef CONFIG_PM
 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
 extern void ata_host_resume(struct ata_host *host);
-- 
cgit v1.2.3-70-g09d2


From 955e57dfde4ff75e4d7329ac7a3d645b16015309 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: linkify EH action helpers

Make ata_eh_about_to_do() and ata_eh_done() deal with ata_link instead
of ata_port.

This patch introduces no behavior change.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 35 ++++++++++++++++++-----------------
 1 file changed, 18 insertions(+), 17 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 48ca68b3979..fc4b6413b19 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -947,23 +947,24 @@ static void ata_eh_detach_dev(struct ata_device *dev)
 
 /**
  *	ata_eh_about_to_do - about to perform eh_action
- *	@ap: target ATA port
+ *	@link: target ATA link
  *	@dev: target ATA dev for per-dev action (can be NULL)
  *	@action: action about to be performed
  *
  *	Called just before performing EH actions to clear related bits
- *	in @ap->link.eh_info such that eh actions are not
- *	unnecessarily repeated.
+ *	in @link->eh_info such that eh actions are not unnecessarily
+ *	repeated.
  *
  *	LOCKING:
  *	None.
  */
-static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
+static void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
 			       unsigned int action)
 {
+	struct ata_port *ap = link->ap;
+	struct ata_eh_info *ehi = &link->eh_info;
+	struct ata_eh_context *ehc = &link->eh_context;
 	unsigned long flags;
-	struct ata_eh_info *ehi = &ap->link.eh_info;
-	struct ata_eh_context *ehc = &ap->link.eh_context;
 
 	spin_lock_irqsave(ap->lock, flags);
 
@@ -980,7 +981,7 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
 		ehi->flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
 	}
 
-	ata_eh_clear_action(&ap->link, dev, ehi, action);
+	ata_eh_clear_action(link, dev, ehi, action);
 
 	if (!(ehc->i.flags & ATA_EHI_QUIET))
 		ap->pflags |= ATA_PFLAG_RECOVERED;
@@ -990,20 +991,20 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
 
 /**
  *	ata_eh_done - EH action complete
- *	@ap: target ATA port
+*	@ap: target ATA port
  *	@dev: target ATA dev for per-dev action (can be NULL)
  *	@action: action just completed
  *
  *	Called right after performing EH actions to clear related bits
- *	in @ap->link.eh_context.
+ *	in @link->eh_context.
  *
  *	LOCKING:
  *	None.
  */
-static void ata_eh_done(struct ata_port *ap, struct ata_device *dev,
+static void ata_eh_done(struct ata_link *link, struct ata_device *dev,
 			unsigned int action)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_eh_context *ehc = &link->eh_context;
 
 	/* if reset is complete, clear all reset actions & reset modifier */
 	if (action & ATA_EH_RESET_MASK) {
@@ -1011,7 +1012,7 @@ static void ata_eh_done(struct ata_port *ap, struct ata_device *dev,
 		ehc->i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
 	}
 
-	ata_eh_clear_action(&ap->link, dev, &ehc->i, action);
+	ata_eh_clear_action(link, dev, &ehc->i, action);
 }
 
 /**
@@ -1795,7 +1796,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 	int rc;
 
 	/* about to reset */
-	ata_eh_about_to_do(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);
+	ata_eh_about_to_do(link, NULL, ehc->i.action & ATA_EH_RESET_MASK);
 
 	/* Determine which reset to use and record in ehc->i.action.
 	 * prereset() may examine and modify it.
@@ -1877,7 +1878,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			goto out;
 		}
 
-		ata_eh_about_to_do(ap, NULL, ATA_EH_RESET_MASK);
+		ata_eh_about_to_do(link, NULL, ATA_EH_RESET_MASK);
 		rc = ata_do_reset(ap, reset, classes, deadline);
 
 		if (rc == 0 && classify &&
@@ -1927,7 +1928,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			postreset(ap, classes);
 
 		/* reset successful, schedule revalidation */
-		ata_eh_done(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);
+		ata_eh_done(link, NULL, ehc->i.action & ATA_EH_RESET_MASK);
 		ehc->i.action |= ATA_EH_REVALIDATE;
 	}
  out:
@@ -1964,12 +1965,12 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 				goto err;
 			}
 
-			ata_eh_about_to_do(ap, dev, ATA_EH_REVALIDATE);
+			ata_eh_about_to_do(&ap->link, dev, ATA_EH_REVALIDATE);
 			rc = ata_dev_revalidate(dev, readid_flags);
 			if (rc)
 				goto err;
 
-			ata_eh_done(ap, dev, ATA_EH_REVALIDATE);
+			ata_eh_done(&ap->link, dev, ATA_EH_REVALIDATE);
 
 			/* Configuration may have changed, reconfigure
 			 * transfer mode.
-- 
cgit v1.2.3-70-g09d2


From cc0680a580b5be81a1ca321b58f8e9b80b5c1052 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: linkify reset

Make reset methods and related functions deal with ata_link instead of
ata_port.

* ata_do_reset()
* ata_eh_reset()
* all prereset/reset/postreset methods and related functions

This patch introduces no behavior change.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c          | 34 +++++++++++++++++--------------
 drivers/ata/ata_piix.c      |  7 ++++---
 drivers/ata/libata-core.c   | 49 ++++++++++++++++++++++-----------------------
 drivers/ata/libata-eh.c     | 35 ++++++++++++++++----------------
 drivers/ata/pata_amd.c      | 16 ++++++++-------
 drivers/ata/pata_artop.c    | 12 ++++++-----
 drivers/ata/pata_atiixp.c   |  5 +++--
 drivers/ata/pata_efar.c     |  7 ++++---
 drivers/ata/pata_hpt37x.c   | 12 ++++++-----
 drivers/ata/pata_hpt3x2n.c  |  7 ++++---
 drivers/ata/pata_it8213.c   |  7 ++++---
 drivers/ata/pata_jmicron.c  |  8 ++++----
 drivers/ata/pata_marvell.c  |  7 ++++---
 drivers/ata/pata_mpiix.c    |  5 +++--
 drivers/ata/pata_ns87410.c  |  7 ++++---
 drivers/ata/pata_oldpiix.c  |  7 ++++---
 drivers/ata/pata_opti.c     |  7 ++++---
 drivers/ata/pata_optidma.c  |  7 ++++---
 drivers/ata/pata_pdc2027x.c |  8 ++++----
 drivers/ata/pata_sil680.c   |  7 ++++---
 drivers/ata/pata_sis.c      |  7 ++++---
 drivers/ata/pata_sl82c105.c |  7 ++++---
 drivers/ata/pata_triflex.c  |  7 ++++---
 drivers/ata/pata_via.c      |  5 +++--
 drivers/ata/sata_inic162x.c | 13 ++++++------
 drivers/ata/sata_mv.c       | 19 ++++++++++--------
 drivers/ata/sata_nv.c       |  4 ++--
 drivers/ata/sata_sil24.c    | 26 +++++++++++++-----------
 drivers/ata/sata_via.c      |  5 +++--
 drivers/scsi/ipr.c          |  8 ++++----
 include/linux/libata.h      | 19 +++++++++---------
 31 files changed, 203 insertions(+), 171 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 6e5f69a3a0c..e38ae12d014 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1042,9 +1042,10 @@ static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
 	return 0;
 }
 
-static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
+static int ahci_do_softreset(struct ata_link *link, unsigned int *class,
 			     int pmp, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	const char *reason = NULL;
 	unsigned long now, msecs;
 	struct ata_taskfile tf;
@@ -1052,7 +1053,7 @@ static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
 
 	DPRINTK("ENTER\n");
 
-	if (ata_link_offline(&ap->link)) {
+	if (ata_link_offline(link)) {
 		DPRINTK("PHY reports no device\n");
 		*class = ATA_DEV_NONE;
 		return 0;
@@ -1061,10 +1062,10 @@ static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
 	/* prepare for SRST (AHCI-1.1 10.4.1) */
 	rc = ahci_kick_engine(ap, 1);
 	if (rc)
-		ata_port_printk(ap, KERN_WARNING,
+		ata_link_printk(link, KERN_WARNING,
 				"failed to reset engine (errno=%d)", rc);
 
-	ata_tf_init(ap->link.device, &tf);
+	ata_tf_init(link->device, &tf);
 
 	/* issue the first D2H Register FIS */
 	msecs = 0;
@@ -1109,19 +1110,20 @@ static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
 	return 0;
 
  fail:
-	ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
+	ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
 	return rc;
 }
 
-static int ahci_softreset(struct ata_port *ap, unsigned int *class,
+static int ahci_softreset(struct ata_link *link, unsigned int *class,
 			  unsigned long deadline)
 {
-	return ahci_do_softreset(ap, class, 0, deadline);
+	return ahci_do_softreset(link, class, 0, deadline);
 }
 
-static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
+static int ahci_hardreset(struct ata_link *link, unsigned int *class,
 			  unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct ahci_port_priv *pp = ap->private_data;
 	u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
 	struct ata_taskfile tf;
@@ -1132,15 +1134,15 @@ static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
 	ahci_stop_engine(ap);
 
 	/* clear D2H reception area to properly wait for D2H FIS */
-	ata_tf_init(ap->link.device, &tf);
+	ata_tf_init(link->device, &tf);
 	tf.command = 0x80;
 	ata_tf_to_fis(&tf, 0, 0, d2h_fis);
 
-	rc = sata_std_hardreset(ap, class, deadline);
+	rc = sata_std_hardreset(link, class, deadline);
 
 	ahci_start_engine(ap);
 
-	if (rc == 0 && ata_link_online(&ap->link))
+	if (rc == 0 && ata_link_online(link))
 		*class = ahci_dev_classify(ap);
 	if (*class == ATA_DEV_UNKNOWN)
 		*class = ATA_DEV_NONE;
@@ -1149,9 +1151,10 @@ static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
 	return rc;
 }
 
-static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
+static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
 				 unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	u32 serror;
 	int rc;
 
@@ -1159,7 +1162,7 @@ static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
 
 	ahci_stop_engine(ap);
 
-	rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->link.eh_context),
+	rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
 				 deadline);
 
 	/* vt8251 needs SError cleared for the port to operate */
@@ -1176,12 +1179,13 @@ static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
 	return rc ?: -EAGAIN;
 }
 
-static void ahci_postreset(struct ata_port *ap, unsigned int *class)
+static void ahci_postreset(struct ata_link *link, unsigned int *class)
 {
+	struct ata_port *ap = link->ap;
 	void __iomem *port_mmio = ahci_port_base(ap);
 	u32 new_tmp, tmp;
 
-	ata_std_postreset(ap, class);
+	ata_std_postreset(link, class);
 
 	/* Make sure port's ATAPI bit is set appropriately */
 	new_tmp = tmp = readl(port_mmio + PORT_CMD);
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 92c2d5082be..03fe493026e 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -657,19 +657,20 @@ static int ich_pata_cable_detect(struct ata_port *ap)
 
 /**
  *	piix_pata_prereset - prereset for PATA host controller
- *	@ap: Target port
+ *	@link: Target link
  *	@deadline: deadline jiffies for the operation
  *
  *	LOCKING:
  *	None (inherited from caller).
  */
-static int piix_pata_prereset(struct ata_port *ap, unsigned long deadline)
+static int piix_pata_prereset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
 		return -ENOENT;
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 static void piix_pata_error_handler(struct ata_port *ap)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 6f99dee6b6d..73f66f4e1ee 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3306,10 +3306,10 @@ int sata_link_resume(struct ata_link *link, const unsigned long *params,
 
 /**
  *	ata_std_prereset - prepare for reset
- *	@ap: ATA port to be reset
+ *	@link: ATA link to be reset
  *	@deadline: deadline jiffies for the operation
  *
- *	@ap is about to be reset.  Initialize it.  Failure from
+ *	@link is about to be reset.  Initialize it.  Failure from
  *	prereset makes libata abort whole reset sequence and give up
  *	that port, so prereset should be best-effort.  It does its
  *	best to prepare for reset sequence but if things go wrong, it
@@ -3321,9 +3321,9 @@ int sata_link_resume(struct ata_link *link, const unsigned long *params,
  *	RETURNS:
  *	0 on success, -errno otherwise.
  */
-int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
+int ata_std_prereset(struct ata_link *link, unsigned long deadline)
 {
-	struct ata_link *link = &ap->link;
+	struct ata_port *ap = link->ap;
 	struct ata_eh_context *ehc = &link->eh_context;
 	const unsigned long *timing = sata_ehc_deb_timing(ehc);
 	int rc;
@@ -3342,7 +3342,7 @@ int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
 		rc = sata_link_resume(link, timing, deadline);
 		/* whine about phy resume failure but proceed */
 		if (rc && rc != -EOPNOTSUPP)
-			ata_port_printk(ap, KERN_WARNING, "failed to resume "
+			ata_link_printk(link, KERN_WARNING, "failed to resume "
 					"link for reset (errno=%d)\n", rc);
 	}
 
@@ -3352,7 +3352,7 @@ int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
 	if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
 		rc = ata_wait_ready(ap, deadline);
 		if (rc && rc != -ENODEV) {
-			ata_port_printk(ap, KERN_WARNING, "device not ready "
+			ata_link_printk(link, KERN_WARNING, "device not ready "
 					"(errno=%d), forcing hardreset\n", rc);
 			ehc->i.action |= ATA_EH_HARDRESET;
 		}
@@ -3363,7 +3363,7 @@ int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
 
 /**
  *	ata_std_softreset - reset host port via ATA SRST
- *	@ap: port to reset
+ *	@link: ATA link to reset
  *	@classes: resulting classes of attached devices
  *	@deadline: deadline jiffies for the operation
  *
@@ -3375,10 +3375,10 @@ int ata_std_prereset(struct ata_port *ap, unsigned long deadline)
  *	RETURNS:
  *	0 on success, -errno otherwise.
  */
-int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
+int ata_std_softreset(struct ata_link *link, unsigned int *classes,
 		      unsigned long deadline)
 {
-	struct ata_link *link = &ap->link;
+	struct ata_port *ap = link->ap;
 	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
 	unsigned int devmask = 0;
 	int rc;
@@ -3405,7 +3405,7 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
 	rc = ata_bus_softreset(ap, devmask, deadline);
 	/* if link is occupied, -ENODEV too is an error */
 	if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
-		ata_port_printk(ap, KERN_ERR, "SRST failed (errno=%d)\n", rc);
+		ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc);
 		return rc;
 	}
 
@@ -3420,12 +3420,12 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
 }
 
 /**
- *	sata_port_hardreset - reset port via SATA phy reset
- *	@ap: port to reset
+ *	sata_link_hardreset - reset link via SATA phy reset
+ *	@link: link to reset
  *	@timing: timing parameters { interval, duratinon, timeout } in msec
  *	@deadline: deadline jiffies for the operation
  *
- *	SATA phy-reset host port using DET bits of SControl register.
+ *	SATA phy-reset @link using DET bits of SControl register.
  *
  *	LOCKING:
  *	Kernel thread context (may sleep)
@@ -3433,10 +3433,9 @@ int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
  *	RETURNS:
  *	0 on success, -errno otherwise.
  */
-int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
+int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
 			unsigned long deadline)
 {
-	struct ata_link *link = &ap->link;
 	u32 scontrol;
 	int rc;
 
@@ -3482,7 +3481,7 @@ int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
 
 /**
  *	sata_std_hardreset - reset host port via SATA phy reset
- *	@ap: port to reset
+ *	@link: link to reset
  *	@class: resulting class of attached device
  *	@deadline: deadline jiffies for the operation
  *
@@ -3495,19 +3494,19 @@ int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
  *	RETURNS:
  *	0 on success, -errno otherwise.
  */
-int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
+int sata_std_hardreset(struct ata_link *link, unsigned int *class,
 		       unsigned long deadline)
 {
-	struct ata_link *link = &ap->link;
+	struct ata_port *ap = link->ap;
 	const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
 	int rc;
 
 	DPRINTK("ENTER\n");
 
 	/* do hardreset */
-	rc = sata_port_hardreset(ap, timing, deadline);
+	rc = sata_link_hardreset(link, timing, deadline);
 	if (rc) {
-		ata_port_printk(ap, KERN_ERR,
+		ata_link_printk(link, KERN_ERR,
 				"COMRESET failed (errno=%d)\n", rc);
 		return rc;
 	}
@@ -3525,7 +3524,7 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
 	rc = ata_wait_ready(ap, deadline);
 	/* link occupied, -ENODEV too is an error */
 	if (rc) {
-		ata_port_printk(ap, KERN_ERR,
+		ata_link_printk(link, KERN_ERR,
 				"COMRESET failed (errno=%d)\n", rc);
 		return rc;
 	}
@@ -3540,7 +3539,7 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
 
 /**
  *	ata_std_postreset - standard postreset callback
- *	@ap: the target ata_port
+ *	@link: the target ata_link
  *	@classes: classes of attached devices
  *
  *	This function is invoked after a successful reset.  Note that
@@ -3550,9 +3549,9 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
  *	LOCKING:
  *	Kernel thread context (may sleep)
  */
-void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
+void ata_std_postreset(struct ata_link *link, unsigned int *classes)
 {
-	struct ata_link *link = &ap->link;
+	struct ata_port *ap = link->ap;
 	u32 serror;
 
 	DPRINTK("ENTER\n");
@@ -6946,7 +6945,7 @@ EXPORT_SYMBOL_GPL(__sata_phy_reset);
 EXPORT_SYMBOL_GPL(ata_bus_reset);
 EXPORT_SYMBOL_GPL(ata_std_prereset);
 EXPORT_SYMBOL_GPL(ata_std_softreset);
-EXPORT_SYMBOL_GPL(sata_port_hardreset);
+EXPORT_SYMBOL_GPL(sata_link_hardreset);
 EXPORT_SYMBOL_GPL(sata_std_hardreset);
 EXPORT_SYMBOL_GPL(ata_std_postreset);
 EXPORT_SYMBOL_GPL(ata_dev_classify);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index fc4b6413b19..0a9ce34a0e6 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1737,16 +1737,16 @@ static void ata_eh_report(struct ata_port *ap)
 	}
 }
 
-static int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
+static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset,
 			unsigned int *classes, unsigned long deadline)
 {
 	struct ata_device *dev;
 	int rc;
 
-	ata_link_for_each_dev(dev, &ap->link)
+	ata_link_for_each_dev(dev, link)
 		classes[dev->devno] = ATA_DEV_UNKNOWN;
 
-	rc = reset(ap, classes, deadline);
+	rc = reset(link, classes, deadline);
 	if (rc)
 		return rc;
 
@@ -1754,12 +1754,12 @@ static int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
 	 * is complete and convert all ATA_DEV_UNKNOWN to
 	 * ATA_DEV_NONE.
 	 */
-	ata_link_for_each_dev(dev, &ap->link)
+	ata_link_for_each_dev(dev, link)
 		if (classes[dev->devno] != ATA_DEV_UNKNOWN)
 			break;
 
 	if (dev) {
-		ata_link_for_each_dev(dev, &ap->link) {
+		ata_link_for_each_dev(dev, link) {
 			if (classes[dev->devno] == ATA_DEV_UNKNOWN)
 				classes[dev->devno] = ATA_DEV_NONE;
 		}
@@ -1780,11 +1780,10 @@ static int ata_eh_followup_srst_needed(int rc, int classify,
 	return 0;
 }
 
-static int ata_eh_reset(struct ata_port *ap, int classify,
+static int ata_eh_reset(struct ata_link *link, int classify,
 			ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 			ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
 {
-	struct ata_link *link = &ap->link;
 	struct ata_eh_context *ehc = &link->eh_context;
 	unsigned int *classes = ehc->classes;
 	int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
@@ -1810,10 +1809,10 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		ehc->i.action |= ATA_EH_HARDRESET;
 
 	if (prereset) {
-		rc = prereset(ap, jiffies + ATA_EH_PRERESET_TIMEOUT);
+		rc = prereset(link, jiffies + ATA_EH_PRERESET_TIMEOUT);
 		if (rc) {
 			if (rc == -ENOENT) {
-				ata_port_printk(ap, KERN_DEBUG,
+				ata_link_printk(link, KERN_DEBUG,
 						"port disabled. ignoring.\n");
 				ehc->i.action &= ~ATA_EH_RESET_MASK;
 
@@ -1822,7 +1821,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 
 				rc = 0;
 			} else
-				ata_port_printk(ap, KERN_ERR,
+				ata_link_printk(link, KERN_ERR,
 					"prereset failed (errno=%d)\n", rc);
 			goto out;
 		}
@@ -1854,7 +1853,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 
 	/* shut up during boot probing */
 	if (verbose)
-		ata_port_printk(ap, KERN_INFO, "%s resetting port\n",
+		ata_link_printk(link, KERN_INFO, "%s resetting link\n",
 				reset == softreset ? "soft" : "hard");
 
 	/* mark that this EH session started with reset */
@@ -1863,7 +1862,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 	else
 		ehc->i.flags |= ATA_EHI_DID_SOFTRESET;
 
-	rc = ata_do_reset(ap, reset, classes, deadline);
+	rc = ata_do_reset(link, reset, classes, deadline);
 
 	if (reset == hardreset &&
 	    ata_eh_followup_srst_needed(rc, classify, classes)) {
@@ -1871,7 +1870,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		reset = softreset;
 
 		if (!reset) {
-			ata_port_printk(ap, KERN_ERR,
+			ata_link_printk(link, KERN_ERR,
 					"follow-up softreset required "
 					"but no softreset avaliable\n");
 			rc = -EINVAL;
@@ -1879,11 +1878,11 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		}
 
 		ata_eh_about_to_do(link, NULL, ATA_EH_RESET_MASK);
-		rc = ata_do_reset(ap, reset, classes, deadline);
+		rc = ata_do_reset(link, reset, classes, deadline);
 
 		if (rc == 0 && classify &&
 		    classes[0] == ATA_DEV_UNKNOWN) {
-			ata_port_printk(ap, KERN_ERR,
+			ata_link_printk(link, KERN_ERR,
 					"classification failed\n");
 			rc = -EINVAL;
 			goto out;
@@ -1896,7 +1895,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 		if (time_before(now, deadline)) {
 			unsigned long delta = deadline - jiffies;
 
-			ata_port_printk(ap, KERN_WARNING, "reset failed "
+			ata_link_printk(link, KERN_WARNING, "reset failed "
 				"(errno=%d), retrying in %u secs\n",
 				rc, (jiffies_to_msecs(delta) + 999) / 1000);
 
@@ -1925,7 +1924,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
 			link->sata_spd = (sstatus >> 4) & 0xf;
 
 		if (postreset)
-			postreset(ap, classes);
+			postreset(link, classes);
 
 		/* reset successful, schedule revalidation */
 		ata_eh_done(link, NULL, ehc->i.action & ATA_EH_RESET_MASK);
@@ -2202,7 +2201,7 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 	if (ehc->i.action & ATA_EH_RESET_MASK) {
 		ata_eh_freeze_port(ap);
 
-		rc = ata_eh_reset(ap, ata_port_nr_vacant(ap), prereset,
+		rc = ata_eh_reset(&ap->link, ata_port_nr_vacant(ap), prereset,
 				  softreset, hardreset, postreset);
 		if (rc) {
 			ata_port_printk(ap, KERN_ERR,
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index 04048fcf630..d0cebe16a8e 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -119,27 +119,28 @@ static void timing_setup(struct ata_port *ap, struct ata_device *adev, int offse
 }
 
 /**
- *	amd_probe_init		-	perform reset handling
- *	@ap: ATA port
+ *	amd_pre_reset		-	perform reset handling
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Reset sequence checking enable bits to see which ports are
  *	active.
  */
 
-static int amd_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int amd_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits amd_enable_bits[] = {
 		{ 0x40, 1, 0x02, 0x02 },
 		{ 0x40, 1, 0x01, 0x01 }
 	};
 
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	if (!pci_test_config_bits(pdev, &amd_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 static void amd_error_handler(struct ata_port *ap)
@@ -221,25 +222,26 @@ static void amd133_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 
 /**
  *	nv_probe_init	-	cable detection
- *	@ap: ATA port
+ *	@lin: ATA link
  *
  *	Perform cable detection. The BIOS stores this in PCI config
  *	space for us.
  */
 
-static int nv_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int nv_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits nv_enable_bits[] = {
 		{ 0x50, 1, 0x02, 0x02 },
 		{ 0x50, 1, 0x01, 0x01 }
 	};
 
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	if (!pci_test_config_bits(pdev, &nv_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 static void nv_error_handler(struct ata_port *ap)
diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
index b5352ebecef..361f2fca7e5 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -40,8 +40,9 @@
 
 static int clock = 0;
 
-static int artop6210_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int artop6210_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	const struct pci_bits artop_enable_bits[] = {
 		{ 0x4AU, 1U, 0x02UL, 0x02UL },	/* port 0 */
@@ -51,7 +52,7 @@ static int artop6210_pre_reset(struct ata_port *ap, unsigned long deadline)
 	if (!pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
@@ -71,27 +72,28 @@ static void artop6210_error_handler(struct ata_port *ap)
 
 /**
  *	artop6260_pre_reset	-	check for 40/80 pin
- *	@ap: Port
+ *	@link: link
  *	@deadline: deadline jiffies for the operation
  *
  *	The ARTOP hardware reports the cable detect bits in register 0x49.
  *	Nothing complicated needed here.
  */
 
-static int artop6260_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int artop6260_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits artop_enable_bits[] = {
 		{ 0x4AU, 1U, 0x02UL, 0x02UL },	/* port 0 */
 		{ 0x4AU, 1U, 0x04UL, 0x04UL },	/* port 1 */
 	};
 
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	/* Odd numbered device ids are the units with enable bits (the -R cards) */
 	if (pdev->device % 1 && !pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index 86f85a2cab7..656f4d0a572 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -33,8 +33,9 @@ enum {
 	ATIIXP_IDE_UDMA_MODE 	= 0x56
 };
 
-static int atiixp_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int atiixp_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	static const struct pci_bits atiixp_enable_bits[] = {
 		{ 0x48, 1, 0x01, 0x00 },
 		{ 0x48, 1, 0x08, 0x00 }
@@ -44,7 +45,7 @@ static int atiixp_pre_reset(struct ata_port *ap, unsigned long deadline)
 	if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 static void atiixp_error_handler(struct ata_port *ap)
diff --git a/drivers/ata/pata_efar.c b/drivers/ata/pata_efar.c
index c8ba59c5611..9f6fae6e38b 100644
--- a/drivers/ata/pata_efar.c
+++ b/drivers/ata/pata_efar.c
@@ -26,25 +26,26 @@
 
 /**
  *	efar_pre_reset	-	Enable bits
- *	@ap: Port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Perform cable detection for the EFAR ATA interface. This is
  *	different to the PIIX arrangement
  */
 
-static int efar_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int efar_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits efar_enable_bits[] = {
 		{ 0x41U, 1U, 0x80UL, 0x80UL },	/* port 0 */
 		{ 0x43U, 1U, 0x80UL, 0x80UL },	/* port 1 */
 	};
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	if (!pci_test_config_bits(pdev, &efar_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index c5ddd937dbf..1a4d0ad68d1 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -304,15 +304,16 @@ static unsigned long hpt370a_filter(struct ata_device *adev, unsigned long mask)
 
 /**
  *	hpt37x_pre_reset	-	reset the hpt37x bus
- *	@ap: ATA port to reset
+ *	@link: ATA link to reset
  *	@deadline: deadline jiffies for the operation
  *
  *	Perform the initial reset handling for the 370/372 and 374 func 0
  */
 
-static int hpt37x_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int hpt37x_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	u8 scr2, ata66;
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const struct pci_bits hpt37x_enable_bits[] = {
 		{ 0x50, 1, 0x04, 0x04 },
@@ -337,7 +338,7 @@ static int hpt37x_pre_reset(struct ata_port *ap, unsigned long deadline)
 	pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
 	udelay(100);
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
@@ -352,7 +353,7 @@ static void hpt37x_error_handler(struct ata_port *ap)
 	ata_bmdma_drive_eh(ap, hpt37x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
 }
 
-static int hpt374_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int hpt374_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits hpt37x_enable_bits[] = {
 		{ 0x50, 1, 0x04, 0x04 },
@@ -360,6 +361,7 @@ static int hpt374_pre_reset(struct ata_port *ap, unsigned long deadline)
 	};
 	u16 mcr3, mcr6;
 	u8 ata66;
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
@@ -387,7 +389,7 @@ static int hpt374_pre_reset(struct ata_port *ap, unsigned long deadline)
 	pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
 	udelay(100);
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index f8f234bfc8c..739a89180eb 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -141,21 +141,22 @@ static int hpt3x2n_cable_detect(struct ata_port *ap)
 
 /**
  *	hpt3x2n_pre_reset	-	reset the hpt3x2n bus
- *	@ap: ATA port to reset
+ *	@link: ATA link to reset
  *	@deadline: deadline jiffies for the operation
  *
  *	Perform the initial reset handling for the 3x2n series controllers.
  *	Reset the hardware and state machine,
  */
 
-static int hpt3xn_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int hpt3xn_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	/* Reset the state machine */
 	pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
 	udelay(100);
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_it8213.c b/drivers/ata/pata_it8213.c
index b8af55e8915..1daf1e19bdf 100644
--- a/drivers/ata/pata_it8213.c
+++ b/drivers/ata/pata_it8213.c
@@ -23,23 +23,24 @@
 
 /**
  *	it8213_pre_reset	-	check for 40/80 pin
- *	@ap: Port
+ *	@link: link
  *	@deadline: deadline jiffies for the operation
  *
  *	Filter out ports by the enable bits before doing the normal reset
  *	and probe.
  */
 
-static int it8213_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int it8213_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits it8213_enable_bits[] = {
 		{ 0x41U, 1U, 0x80UL, 0x80UL },	/* port 0 */
 	};
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	if (!pci_test_config_bits(pdev, &it8213_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
index 4d67f238eee..1619b86b74a 100644
--- a/drivers/ata/pata_jmicron.c
+++ b/drivers/ata/pata_jmicron.c
@@ -29,7 +29,7 @@ typedef enum {
 
 /**
  *	jmicron_pre_reset	-	check for 40/80 pin
- *	@ap: Port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Perform the PATA port setup we need.
@@ -39,9 +39,9 @@ typedef enum {
  *	and setup here. We assume that has been done by init_one and the
  *	BIOS.
  */
-
-static int jmicron_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	u32 control;
 	u32 control5;
@@ -103,7 +103,7 @@ static int jmicron_pre_reset(struct ata_port *ap, unsigned long deadline)
 		ap->cbl = ATA_CBL_SATA;
 		break;
 	}
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
index b45506f1ef7..b4dd18f3fa5 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -24,14 +24,15 @@
 
 /**
  *	marvell_pre_reset	-	check for 40/80 pin
- *	@ap: Port
+ *	@link: link
  *	@deadline: deadline jiffies for the operation
  *
  *	Perform the PATA port setup we need.
  */
 
-static int marvell_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	u32 devices;
 	void __iomem *barp;
@@ -54,7 +55,7 @@ static int marvell_pre_reset(struct ata_port *ap, unsigned long deadline)
 	    (!(devices & 0x10)))	/* PATA enable ? */
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 static int marvell_cable_detect(struct ata_port *ap)
diff --git a/drivers/ata/pata_mpiix.c b/drivers/ata/pata_mpiix.c
index 4ea42838297..36c964b9e7d 100644
--- a/drivers/ata/pata_mpiix.c
+++ b/drivers/ata/pata_mpiix.c
@@ -46,15 +46,16 @@ enum {
 	SECONDARY = (1 << 14)
 };
 
-static int mpiix_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int mpiix_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const struct pci_bits mpiix_enable_bits = { 0x6D, 1, 0x80, 0x80 };
 
 	if (!pci_test_config_bits(pdev, &mpiix_enable_bits))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_ns87410.c b/drivers/ata/pata_ns87410.c
index 2f5d714ebfc..65a21772771 100644
--- a/drivers/ata/pata_ns87410.c
+++ b/drivers/ata/pata_ns87410.c
@@ -32,14 +32,15 @@
 
 /**
  *	ns87410_pre_reset		-	probe begin
- *	@ap: ATA port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Check enabled ports
  */
 
-static int ns87410_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const struct pci_bits ns87410_enable_bits[] = {
 		{ 0x43, 1, 0x08, 0x08 },
@@ -49,7 +50,7 @@ static int ns87410_pre_reset(struct ata_port *ap, unsigned long deadline)
 	if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_oldpiix.c b/drivers/ata/pata_oldpiix.c
index 091a70a0ef1..5b2c86fe9fc 100644
--- a/drivers/ata/pata_oldpiix.c
+++ b/drivers/ata/pata_oldpiix.c
@@ -29,14 +29,15 @@
 
 /**
  *	oldpiix_pre_reset		-	probe begin
- *	@ap: ATA port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Set up cable type and use generic probe init
  */
 
-static int oldpiix_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int oldpiix_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const struct pci_bits oldpiix_enable_bits[] = {
 		{ 0x41U, 1U, 0x80UL, 0x80UL },	/* port 0 */
@@ -46,7 +47,7 @@ static int oldpiix_pre_reset(struct ata_port *ap, unsigned long deadline)
 	if (!pci_test_config_bits(pdev, &oldpiix_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_opti.c b/drivers/ata/pata_opti.c
index 458bf67f766..5770c7755a6 100644
--- a/drivers/ata/pata_opti.c
+++ b/drivers/ata/pata_opti.c
@@ -46,14 +46,15 @@ enum {
 
 /**
  *	opti_pre_reset		-	probe begin
- *	@ap: ATA port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Set up cable type and use generic probe init
  */
 
-static int opti_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int opti_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const struct pci_bits opti_enable_bits[] = {
 		{ 0x45, 1, 0x80, 0x00 },
@@ -63,7 +64,7 @@ static int opti_pre_reset(struct ata_port *ap, unsigned long deadline)
 	if (!pci_test_config_bits(pdev, &opti_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_optidma.c b/drivers/ata/pata_optidma.c
index f8234d7fd82..39fcba80007 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -47,14 +47,15 @@ static int pci_clock;	/* 0 = 33 1 = 25 */
 
 /**
  *	optidma_pre_reset		-	probe begin
- *	@ap: ATA port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Set up cable type and use generic probe init
  */
 
-static int optidma_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int optidma_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const struct pci_bits optidma_enable_bits = {
 		0x40, 1, 0x08, 0x00
@@ -63,7 +64,7 @@ static int optidma_pre_reset(struct ata_port *ap, unsigned long deadline)
 	if (ap->port_no && !pci_test_config_bits(pdev, &optidma_enable_bits))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 83c90cabc7f..ba39efbe540 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -300,7 +300,7 @@ static inline int pdc2027x_port_enabled(struct ata_port *ap)
 
 /**
  *	pdc2027x_prereset - prereset for PATA host controller
- *	@ap: Target port
+ *	@link: Target link
  *	@deadline: deadline jiffies for the operation
  *
  *	Probeinit including cable detection.
@@ -309,12 +309,12 @@ static inline int pdc2027x_port_enabled(struct ata_port *ap)
  *	None (inherited from caller).
  */
 
-static int pdc2027x_prereset(struct ata_port *ap, unsigned long deadline)
+static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline)
 {
 	/* Check whether port enabled */
-	if (!pdc2027x_port_enabled(ap))
+	if (!pdc2027x_port_enabled(link->ap))
 		return -ENOENT;
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 /**
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index 40395804a66..45515a22d85 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -95,15 +95,16 @@ static int sil680_cable_detect(struct ata_port *ap) {
 
 /**
  *	sil680_bus_reset	-	reset the SIL680 bus
- *	@ap: ATA port to reset
+ *	@link: ATA link to reset
  *	@deadline: deadline jiffies for the operation
  *
  *	Perform the SIL680 housekeeping when doing an ATA bus reset
  */
 
-static int sil680_bus_reset(struct ata_port *ap,unsigned int *classes,
+static int sil680_bus_reset(struct ata_link *link, unsigned int *classes,
 			    unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	unsigned long addr = sil680_selreg(ap, 0);
 	u8 reset;
@@ -112,7 +113,7 @@ static int sil680_bus_reset(struct ata_port *ap,unsigned int *classes,
 	pci_write_config_byte(pdev, addr, reset | 0x03);
 	udelay(25);
 	pci_write_config_byte(pdev, addr, reset);
-	return ata_std_softreset(ap, classes, deadline);
+	return ata_std_softreset(link, classes, deadline);
 }
 
 static void sil680_error_handler(struct ata_port *ap)
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 9d6f81d52e1..b72227676f0 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -133,19 +133,20 @@ static int sis_66_cable_detect(struct ata_port *ap)
 
 /**
  *	sis_pre_reset		-	probe begin
- *	@ap: ATA port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Set up cable type and use generic probe init
  */
 
-static int sis_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int sis_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits sis_enable_bits[] = {
 		{ 0x4aU, 1U, 0x02UL, 0x02UL },	/* port 0 */
 		{ 0x4aU, 1U, 0x04UL, 0x04UL },	/* port 1 */
 	};
 
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	if (!pci_test_config_bits(pdev, &sis_enable_bits[ap->port_no]))
@@ -154,7 +155,7 @@ static int sis_pre_reset(struct ata_port *ap, unsigned long deadline)
 	/* Clear the FIFO settings. We can't enable the FIFO until
 	   we know we are poking at a disk */
 	pci_write_config_byte(pdev, 0x4B, 0);
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index c0f43bb2595..375c3705dc4 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -43,23 +43,24 @@ enum {
 
 /**
  *	sl82c105_pre_reset		-	probe begin
- *	@ap: ATA port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Set up cable type and use generic probe init
  */
 
-static int sl82c105_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int sl82c105_pre_reset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits sl82c105_enable_bits[] = {
 		{ 0x40, 1, 0x01, 0x01 },
 		{ 0x40, 1, 0x10, 0x10 }
 	};
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	if (ap->port_no && !pci_test_config_bits(pdev, &sl82c105_enable_bits[ap->port_no]))
 		return -ENOENT;
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 
diff --git a/drivers/ata/pata_triflex.c b/drivers/ata/pata_triflex.c
index af21f443db6..bc4b6f6be96 100644
--- a/drivers/ata/pata_triflex.c
+++ b/drivers/ata/pata_triflex.c
@@ -47,25 +47,26 @@
 
 /**
  *	triflex_prereset		-	probe begin
- *	@ap: ATA port
+ *	@link: ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	Set up cable type and use generic probe init
  */
 
-static int triflex_prereset(struct ata_port *ap, unsigned long deadline)
+static int triflex_prereset(struct ata_link *link, unsigned long deadline)
 {
 	static const struct pci_bits triflex_enable_bits[] = {
 		{ 0x80, 1, 0x01, 0x01 },
 		{ 0x80, 1, 0x02, 0x02 }
 	};
 
+	struct ata_port *ap = link->ap;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 
 	if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no]))
 		return -ENOENT;
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index f143db4559e..b612808a319 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -187,8 +187,9 @@ static int via_cable_detect(struct ata_port *ap) {
 	return ATA_CBL_PATA40;
 }
 
-static int via_pre_reset(struct ata_port *ap, unsigned long deadline)
+static int via_pre_reset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	const struct via_isa_bridge *config = ap->host->private_data;
 
 	if (!(config->flags & VIA_NO_ENABLES)) {
@@ -201,7 +202,7 @@ static int via_pre_reset(struct ata_port *ap, unsigned long deadline)
 			return -ENOENT;
 	}
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index f2b1bea934b..95caba0f910 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -417,12 +417,13 @@ static void inic_thaw(struct ata_port *ap)
  * SRST and SControl hardreset don't give valid signature on this
  * controller.  Only controller specific hardreset mechanism works.
  */
-static int inic_hardreset(struct ata_port *ap, unsigned int *class,
+static int inic_hardreset(struct ata_link *link, unsigned int *class,
 			  unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	void __iomem *port_base = inic_port_base(ap);
 	void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
-	const unsigned long *timing = sata_ehc_deb_timing(&ap->link.eh_context);
+	const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
 	u16 val;
 	int rc;
 
@@ -435,15 +436,15 @@ static int inic_hardreset(struct ata_port *ap, unsigned int *class,
 	msleep(1);
 	writew(val & ~IDMA_CTL_RST_ATA, idma_ctl);
 
-	rc = sata_link_resume(&ap->link, timing, deadline);
+	rc = sata_link_resume(link, timing, deadline);
 	if (rc) {
-		ata_port_printk(ap, KERN_WARNING, "failed to resume "
+		ata_link_printk(link, KERN_WARNING, "failed to resume "
 				"link after reset (errno=%d)\n", rc);
 		return rc;
 	}
 
 	*class = ATA_DEV_NONE;
-	if (ata_link_online(&ap->link)) {
+	if (ata_link_online(link)) {
 		struct ata_taskfile tf;
 
 		/* wait a while before checking status */
@@ -452,7 +453,7 @@ static int inic_hardreset(struct ata_port *ap, unsigned int *class,
 		rc = ata_wait_ready(ap, deadline);
 		/* link occupied, -ENODEV too is an error */
 		if (rc) {
-			ata_port_printk(ap, KERN_WARNING, "device not ready "
+			ata_link_printk(link, KERN_WARNING, "device not ready "
 					"after hardreset (errno=%d)\n", rc);
 			return rc;
 		}
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 8e63c60adaf..56784ce1054 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2266,10 +2266,11 @@ comreset_retry:
 	VPRINTK("EXIT\n");
 }
 
-static int mv_prereset(struct ata_port *ap, unsigned long deadline)
+static int mv_prereset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct mv_port_priv *pp	= ap->private_data;
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_eh_context *ehc = &link->eh_context;
 	int rc;
 
 	rc = mv_stop_dma(ap);
@@ -2285,7 +2286,7 @@ static int mv_prereset(struct ata_port *ap, unsigned long deadline)
 	if (ehc->i.action & ATA_EH_HARDRESET)
 		return 0;
 
-	if (ata_link_online(&ap->link))
+	if (ata_link_online(link))
 		rc = ata_wait_ready(ap, deadline);
 	else
 		rc = -ENODEV;
@@ -2293,9 +2294,10 @@ static int mv_prereset(struct ata_port *ap, unsigned long deadline)
 	return rc;
 }
 
-static int mv_hardreset(struct ata_port *ap, unsigned int *class,
+static int mv_hardreset(struct ata_link *link, unsigned int *class,
 			unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct mv_host_priv *hpriv = ap->host->private_data;
 	void __iomem *mmio = ap->host->iomap[MV_PRIMARY_BAR];
 
@@ -2308,16 +2310,17 @@ static int mv_hardreset(struct ata_port *ap, unsigned int *class,
 	return 0;
 }
 
-static void mv_postreset(struct ata_port *ap, unsigned int *classes)
+static void mv_postreset(struct ata_link *link, unsigned int *classes)
 {
+	struct ata_port *ap = link->ap;
 	u32 serr;
 
 	/* print link status */
-	sata_print_link_status(&ap->link);
+	sata_print_link_status(link);
 
 	/* clear SError */
-	sata_scr_read(&ap->link, SCR_ERROR, &serr);
-	sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
+	sata_scr_read(link, SCR_ERROR, &serr);
+	sata_scr_write_flush(link, SCR_ERROR, serr);
 
 	/* bail out if no device is present */
 	if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index df4d50dcffb..67ba0f75f1e 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -1459,7 +1459,7 @@ static void nv_ck804_thaw(struct ata_port *ap)
 	writeb(mask, mmio_base + NV_INT_ENABLE_CK804);
 }
 
-static int nv_hardreset(struct ata_port *ap, unsigned int *class,
+static int nv_hardreset(struct ata_link *link, unsigned int *class,
 			unsigned long deadline)
 {
 	unsigned int dummy;
@@ -1468,7 +1468,7 @@ static int nv_hardreset(struct ata_port *ap, unsigned int *class,
 	 * some controllers.  Don't classify on hardreset.  For more
 	 * info, see http://bugme.osdl.org/show_bug.cgi?id=3352
 	 */
-	return sata_std_hardreset(ap, &dummy, deadline);
+	return sata_std_hardreset(link, &dummy, deadline);
 }
 
 static void nv_error_handler(struct ata_port *ap)
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 0cd40d5215f..869e414d7ed 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -583,9 +583,10 @@ static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
 	return rc;
 }
 
-static int sil24_do_softreset(struct ata_port *ap, unsigned int *class,
+static int sil24_do_softreset(struct ata_link *link, unsigned int *class,
 			      int pmp, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	unsigned long timeout_msec = 0;
 	struct ata_taskfile tf;
 	const char *reason;
@@ -593,7 +594,7 @@ static int sil24_do_softreset(struct ata_port *ap, unsigned int *class,
 
 	DPRINTK("ENTER\n");
 
-	if (ata_link_offline(&ap->link)) {
+	if (ata_link_offline(link)) {
 		DPRINTK("PHY reports no device\n");
 		*class = ATA_DEV_NONE;
 		goto out;
@@ -609,7 +610,7 @@ static int sil24_do_softreset(struct ata_port *ap, unsigned int *class,
 	if (time_after(deadline, jiffies))
 		timeout_msec = jiffies_to_msecs(deadline - jiffies);
 
-	ata_tf_init(ap->link.device, &tf);	/* doesn't really matter */
+	ata_tf_init(link->device, &tf);	/* doesn't really matter */
 	rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST,
 				   timeout_msec);
 	if (rc == -EBUSY) {
@@ -631,29 +632,30 @@ static int sil24_do_softreset(struct ata_port *ap, unsigned int *class,
 	return 0;
 
  err:
-	ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
+	ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
 	return -EIO;
 }
 
-static int sil24_softreset(struct ata_port *ap, unsigned int *class,
+static int sil24_softreset(struct ata_link *link, unsigned int *class,
 			   unsigned long deadline)
 {
-	return sil24_do_softreset(ap, class, 0, deadline);
+	return sil24_do_softreset(link, class, 0, deadline);
 }
 
-static int sil24_hardreset(struct ata_port *ap, unsigned int *class,
+static int sil24_hardreset(struct ata_link *link, unsigned int *class,
 			   unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	void __iomem *port = ap->ioaddr.cmd_addr;
 	const char *reason;
 	int tout_msec, rc;
 	u32 tmp;
 
 	/* sil24 does the right thing(tm) without any protection */
-	sata_set_spd(&ap->link);
+	sata_set_spd(link);
 
 	tout_msec = 100;
-	if (ata_link_online(&ap->link))
+	if (ata_link_online(link))
 		tout_msec = 5000;
 
 	writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
@@ -663,14 +665,14 @@ static int sil24_hardreset(struct ata_port *ap, unsigned int *class,
 	/* SStatus oscillates between zero and valid status after
 	 * DEV_RST, debounce it.
 	 */
-	rc = sata_link_debounce(&ap->link, sata_deb_timing_long, deadline);
+	rc = sata_link_debounce(link, sata_deb_timing_long, deadline);
 	if (rc) {
 		reason = "PHY debouncing failed";
 		goto err;
 	}
 
 	if (tmp & PORT_CS_DEV_RST) {
-		if (ata_link_offline(&ap->link))
+		if (ata_link_offline(link))
 			return 0;
 		reason = "link not ready";
 		goto err;
@@ -685,7 +687,7 @@ static int sil24_hardreset(struct ata_port *ap, unsigned int *class,
 	return -EAGAIN;
 
  err:
-	ata_port_printk(ap, KERN_ERR, "hardreset failed (%s)\n", reason);
+	ata_link_printk(link, KERN_ERR, "hardreset failed (%s)\n", reason);
 	return -EIO;
 }
 
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 78a6833af71..690280660b8 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -276,7 +276,7 @@ static void svia_noop_freeze(struct ata_port *ap)
 
 /**
  *	vt6420_prereset - prereset for vt6420
- *	@ap: target ATA port
+ *	@link: target ATA link
  *	@deadline: deadline jiffies for the operation
  *
  *	SCR registers on vt6420 are pieces of shit and may hang the
@@ -294,8 +294,9 @@ static void svia_noop_freeze(struct ata_port *ap)
  *	RETURNS:
  *	0 on success, -errno otherwise.
  */
-static int vt6420_prereset(struct ata_port *ap, unsigned long deadline)
+static int vt6420_prereset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct ata_eh_context *ehc = &ap->link.eh_context;
 	unsigned long timeout = jiffies + (HZ * 5);
 	u32 sstatus, scontrol;
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index affd77aafb2..9350fbf39f7 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -3829,18 +3829,18 @@ static int ipr_device_reset(struct ipr_ioa_cfg *ioa_cfg,
 
 /**
  * ipr_sata_reset - Reset the SATA port
- * @ap:		SATA port to reset
+ * @link:	SATA link to reset
  * @classes:	class of the attached device
  *
- * This function issues a SATA phy reset to the affected ATA port.
+ * This function issues a SATA phy reset to the affected ATA link.
  *
  * Return value:
  *	0 on success / non-zero on failure
  **/
-static int ipr_sata_reset(struct ata_port *ap, unsigned int *classes,
+static int ipr_sata_reset(struct ata_link *link, unsigned int *classes,
 				unsigned long deadline)
 {
-	struct ipr_sata_port *sata_port = ap->private_data;
+	struct ipr_sata_port *sata_port = link->ap->private_data;
 	struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
 	struct ipr_resource_entry *res;
 	unsigned long lock_flags = 0;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index e7882ba63e7..25444dafae5 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -333,14 +333,15 @@ enum ata_completion_errors {
 struct scsi_device;
 struct ata_port_operations;
 struct ata_port;
+struct ata_link;
 struct ata_queued_cmd;
 
 /* typedefs */
 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
-typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline);
-typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes,
+typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
+typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
 			      unsigned long deadline);
-typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
+typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
 
 struct ata_ioports {
 	void __iomem		*cmd_addr;
@@ -706,14 +707,14 @@ extern int sata_link_debounce(struct ata_link *link,
 			const unsigned long *params, unsigned long deadline);
 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
 			    unsigned long deadline);
-extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline);
-extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
+extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
+extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
 			     unsigned long deadline);
-extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
-			       unsigned long deadline);
-extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
+extern int sata_link_hardreset(struct ata_link *link,
+			const unsigned long *timing, unsigned long deadline);
+extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
 			      unsigned long deadline);
-extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
+extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
 extern void ata_port_disable(struct ata_port *);
 extern void ata_std_ports(struct ata_ioports *ioaddr);
 #ifdef CONFIG_PCI
-- 
cgit v1.2.3-70-g09d2


From 0260731f0187840e272bfa10d3ba0f3e417976f5 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: linkify config/EH related functions

Make the following functions deal with ata_link instead of ata_port.

* ata_set_mode()
* ata_eh_autopsy() and related functions
* ata_eh_report() and related functions
* suspend/resume related functions
* ata_eh_recover() and related functions

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_generic.c    |   7 +--
 drivers/ata/libata-core.c    |  18 ++++---
 drivers/ata/libata-eh.c      | 121 ++++++++++++++++++++++---------------------
 drivers/ata/libata.h         |   2 +-
 drivers/ata/pata_it821x.c    |   6 +--
 drivers/ata/pata_ixp4xx_cf.c |   4 +-
 drivers/ata/pata_legacy.c    |   6 +--
 drivers/ata/pata_optidma.c   |  11 ++--
 drivers/ata/pata_pcmcia.c    |  12 ++---
 drivers/ata/pata_pdc2027x.c  |  11 ++--
 drivers/ata/pata_platform.c  |   4 +-
 drivers/ata/pata_rz1000.c    |   6 +--
 drivers/ata/pdc_adma.c       |   5 +-
 drivers/ata/sata_sil.c       |  16 +++---
 include/linux/libata.h       |   4 +-
 15 files changed, 122 insertions(+), 111 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 44328a16075..e390ad47c8e 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -34,7 +34,7 @@
 
 /**
  *	generic_set_mode	-	mode setting
- *	@ap: interface to set up
+ *	@link: link to set up
  *	@unused: returned device on error
  *
  *	Use a non standard set_mode function. We don't want to be tuned.
@@ -43,8 +43,9 @@
  *	and respect them.
  */
 
-static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int generic_set_mode(struct ata_link *link, struct ata_device **unused)
 {
+	struct ata_port *ap = link->ap;
 	int dma_enabled = 0;
 	struct ata_device *dev;
 
@@ -52,7 +53,7 @@ static int generic_set_mode(struct ata_port *ap, struct ata_device **unused)
 	if (ap->ioaddr.bmdma_addr)
 		dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 73f66f4e1ee..944f54457c8 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2171,7 +2171,7 @@ int ata_bus_probe(struct ata_port *ap)
 	}
 
 	/* configure transfer mode */
-	rc = ata_set_mode(ap, &dev);
+	rc = ata_set_mode(&ap->link, &dev);
 	if (rc)
 		goto fail;
 
@@ -2782,7 +2782,7 @@ static int ata_dev_set_mode(struct ata_device *dev)
 
 /**
  *	ata_do_set_mode - Program timings and issue SET FEATURES - XFER
- *	@ap: port on which timings will be programmed
+ *	@link: link on which timings will be programmed
  *	@r_failed_dev: out paramter for failed device
  *
  *	Standard implementation of the function used to tune and set
@@ -2797,9 +2797,9 @@ static int ata_dev_set_mode(struct ata_device *dev)
  *	0 on success, negative errno otherwise
  */
 
-int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 {
-	struct ata_link *link = &ap->link;
+	struct ata_port *ap = link->ap;
 	struct ata_device *dev;
 	int rc = 0, used_dma = 0, found = 0;
 
@@ -2877,7 +2877,7 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
 
 /**
  *	ata_set_mode - Program timings and issue SET FEATURES - XFER
- *	@ap: port on which timings will be programmed
+ *	@link: link on which timings will be programmed
  *	@r_failed_dev: out paramter for failed device
  *
  *	Set ATA device disk transfer mode (PIO3, UDMA6, etc.).  If
@@ -2890,12 +2890,14 @@ int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
  *	RETURNS:
  *	0 on success, negative errno otherwise
  */
-int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 {
+	struct ata_port *ap = link->ap;
+
 	/* has private set_mode? */
 	if (ap->ops->set_mode)
-		return ap->ops->set_mode(ap, r_failed_dev);
-	return ata_do_set_mode(ap, r_failed_dev);
+		return ap->ops->set_mode(link, r_failed_dev);
+	return ata_do_set_mode(link, r_failed_dev);
 }
 
 /**
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 0a9ce34a0e6..733aa761f3e 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1201,7 +1201,7 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
 
 /**
  *	ata_eh_analyze_serror - analyze SError for a failed port
- *	@ap: ATA port to analyze SError for
+ *	@link: ATA link to analyze SError for
  *
  *	Analyze SError if available and further determine cause of
  *	failure.
@@ -1209,9 +1209,9 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
  *	LOCKING:
  *	None.
  */
-static void ata_eh_analyze_serror(struct ata_port *ap)
+static void ata_eh_analyze_serror(struct ata_link *link)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_eh_context *ehc = &link->eh_context;
 	u32 serror = ehc->i.serror;
 	unsigned int err_mask = 0, action = 0;
 
@@ -1241,7 +1241,7 @@ static void ata_eh_analyze_serror(struct ata_port *ap)
 
 /**
  *	ata_eh_analyze_ncq_error - analyze NCQ error
- *	@ap: ATA port to analyze NCQ error for
+ *	@link: ATA link to analyze NCQ error for
  *
  *	Read log page 10h, determine the offending qc and acquire
  *	error status TF.  For NCQ device errors, all LLDDs have to do
@@ -1251,10 +1251,11 @@ static void ata_eh_analyze_serror(struct ata_port *ap)
  *	LOCKING:
  *	Kernel thread context (may sleep).
  */
-static void ata_eh_analyze_ncq_error(struct ata_port *ap)
+static void ata_eh_analyze_ncq_error(struct ata_link *link)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
-	struct ata_device *dev = ap->link.device;
+	struct ata_port *ap = link->ap;
+	struct ata_eh_context *ehc = &link->eh_context;
+	struct ata_device *dev = link->device;
 	struct ata_queued_cmd *qc;
 	struct ata_taskfile tf;
 	int tag, rc;
@@ -1264,7 +1265,7 @@ static void ata_eh_analyze_ncq_error(struct ata_port *ap)
 		return;
 
 	/* is it NCQ device error? */
-	if (!ap->link.sactive || !(ehc->i.err_mask & AC_ERR_DEV))
+	if (!link->sactive || !(ehc->i.err_mask & AC_ERR_DEV))
 		return;
 
 	/* has LLDD analyzed already? */
@@ -1281,13 +1282,13 @@ static void ata_eh_analyze_ncq_error(struct ata_port *ap)
 	/* okay, this error is ours */
 	rc = ata_eh_read_log_10h(dev, &tag, &tf);
 	if (rc) {
-		ata_port_printk(ap, KERN_ERR, "failed to read log page 10h "
+		ata_link_printk(link, KERN_ERR, "failed to read log page 10h "
 				"(errno=%d)\n", rc);
 		return;
 	}
 
-	if (!(ap->link.sactive & (1 << tag))) {
-		ata_port_printk(ap, KERN_ERR, "log page 10h reported "
+	if (!(link->sactive & (1 << tag))) {
+		ata_link_printk(link, KERN_ERR, "log page 10h reported "
 				"inactive tag %d\n", tag);
 		return;
 	}
@@ -1551,18 +1552,18 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
 
 /**
  *	ata_eh_autopsy - analyze error and determine recovery action
- *	@ap: ATA port to perform autopsy on
+ *	@link: ATA link to perform autopsy on
  *
- *	Analyze why @ap failed and determine which recovery action is
- *	needed.  This function also sets more detailed AC_ERR_* values
- *	and fills sense data for ATAPI CHECK SENSE.
+ *	Analyze why @link failed and determine which recovery actions
+ *	are needed.  This function also sets more detailed AC_ERR_*
+ *	values and fills sense data for ATAPI CHECK SENSE.
  *
  *	LOCKING:
  *	Kernel thread context (may sleep).
  */
-static void ata_eh_autopsy(struct ata_port *ap)
+static void ata_eh_autopsy(struct ata_link *link)
 {
-	struct ata_link *link = &ap->link;
+	struct ata_port *ap = link->ap;
 	struct ata_eh_context *ehc = &link->eh_context;
 	unsigned int all_err_mask = 0;
 	int tag, is_io = 0;
@@ -1578,7 +1579,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
 	rc = sata_scr_read(link, SCR_ERROR, &serror);
 	if (rc == 0) {
 		ehc->i.serror |= serror;
-		ata_eh_analyze_serror(ap);
+		ata_eh_analyze_serror(link);
 	} else if (rc != -EOPNOTSUPP) {
 		/* SError read failed, force hardreset and probing */
 		ata_ehi_schedule_probe(&ehc->i);
@@ -1587,7 +1588,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
 	}
 
 	/* analyze NCQ failure */
-	ata_eh_analyze_ncq_error(ap);
+	ata_eh_analyze_ncq_error(link);
 
 	/* any real error trumps AC_ERR_OTHER */
 	if (ehc->i.err_mask & ~AC_ERR_OTHER)
@@ -1598,7 +1599,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
 		struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
 
-		if (!(qc->flags & ATA_QCFLAG_FAILED))
+		if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link)
 			continue;
 
 		/* inherit upper level err_mask */
@@ -1653,16 +1654,17 @@ static void ata_eh_autopsy(struct ata_port *ap)
 
 /**
  *	ata_eh_report - report error handling to user
- *	@ap: ATA port EH is going on
+ *	@link: ATA link EH is going on
  *
  *	Report EH to user.
  *
  *	LOCKING:
  *	None.
  */
-static void ata_eh_report(struct ata_port *ap)
+static void ata_eh_report(struct ata_link *link)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_port *ap = link->ap;
+	struct ata_eh_context *ehc = &link->eh_context;
 	const char *frozen, *desc;
 	int tag, nr_failed = 0;
 
@@ -1673,7 +1675,7 @@ static void ata_eh_report(struct ata_port *ap)
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
 		struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
 
-		if (!(qc->flags & ATA_QCFLAG_FAILED))
+		if (!(qc->flags & ATA_QCFLAG_FAILED) || qc->dev->link != link)
 			continue;
 		if (qc->flags & ATA_QCFLAG_SENSE_VALID && !qc->err_mask)
 			continue;
@@ -1691,17 +1693,17 @@ static void ata_eh_report(struct ata_port *ap)
 	if (ehc->i.dev) {
 		ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x "
 			       "SAct 0x%x SErr 0x%x action 0x%x%s\n",
-			       ehc->i.err_mask, ap->link.sactive,
+			       ehc->i.err_mask, link->sactive,
 			       ehc->i.serror, ehc->i.action, frozen);
 		if (desc)
 			ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc);
 	} else {
-		ata_port_printk(ap, KERN_ERR, "exception Emask 0x%x "
+		ata_link_printk(link, KERN_ERR, "exception Emask 0x%x "
 				"SAct 0x%x SErr 0x%x action 0x%x%s\n",
-				ehc->i.err_mask, ap->link.sactive,
+				ehc->i.err_mask, link->sactive,
 				ehc->i.serror, ehc->i.action, frozen);
 		if (desc)
-			ata_port_printk(ap, KERN_ERR, "%s\n", desc);
+			ata_link_printk(link, KERN_ERR, "%s\n", desc);
 	}
 
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
@@ -1714,7 +1716,8 @@ static void ata_eh_report(struct ata_port *ap)
 		struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
 		struct ata_taskfile *cmd = &qc->tf, *res = &qc->result_tf;
 
-		if (!(qc->flags & ATA_QCFLAG_FAILED) || !qc->err_mask)
+		if (!(qc->flags & ATA_QCFLAG_FAILED) ||
+		    qc->dev->link != link || !qc->err_mask)
 			continue;
 
 		ata_dev_printk(qc->dev, KERN_ERR,
@@ -1936,10 +1939,11 @@ static int ata_eh_reset(struct ata_link *link, int classify,
 	return rc;
 }
 
-static int ata_eh_revalidate_and_attach(struct ata_port *ap,
+static int ata_eh_revalidate_and_attach(struct ata_link *link,
 					struct ata_device **r_failed_dev)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_port *ap = link->ap;
+	struct ata_eh_context *ehc = &link->eh_context;
 	struct ata_device *dev;
 	unsigned int new_mask = 0;
 	unsigned long flags;
@@ -1951,7 +1955,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	 * be done backwards such that PDIAG- is released by the slave
 	 * device before the master device is identified.
 	 */
-	ata_link_for_each_dev_reverse(dev, &ap->link) {
+	ata_link_for_each_dev_reverse(dev, link) {
 		unsigned int action = ata_eh_dev_action(dev);
 		unsigned int readid_flags = 0;
 
@@ -1959,17 +1963,17 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 			readid_flags |= ATA_READID_POSTRESET;
 
 		if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) {
-			if (ata_link_offline(&ap->link)) {
+			if (ata_link_offline(link)) {
 				rc = -EIO;
 				goto err;
 			}
 
-			ata_eh_about_to_do(&ap->link, dev, ATA_EH_REVALIDATE);
+			ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE);
 			rc = ata_dev_revalidate(dev, readid_flags);
 			if (rc)
 				goto err;
 
-			ata_eh_done(&ap->link, dev, ATA_EH_REVALIDATE);
+			ata_eh_done(link, dev, ATA_EH_REVALIDATE);
 
 			/* Configuration may have changed, reconfigure
 			 * transfer mode.
@@ -2011,7 +2015,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	/* Configure new devices forward such that user doesn't see
 	 * device detection messages backwards.
 	 */
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (!(new_mask & (1 << dev->devno)))
 			continue;
 
@@ -2037,40 +2041,40 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
 	return rc;
 }
 
-static int ata_port_nr_enabled(struct ata_port *ap)
+static int ata_link_nr_enabled(struct ata_link *link)
 {
 	struct ata_device *dev;
 	int cnt = 0;
 
-	ata_link_for_each_dev(dev, &ap->link)
+	ata_link_for_each_dev(dev, link)
 		if (ata_dev_enabled(dev))
 			cnt++;
 	return cnt;
 }
 
-static int ata_port_nr_vacant(struct ata_port *ap)
+static int ata_link_nr_vacant(struct ata_link *link)
 {
 	struct ata_device *dev;
 	int cnt = 0;
 
-	ata_link_for_each_dev(dev, &ap->link)
+	ata_link_for_each_dev(dev, link)
 		if (dev->class == ATA_DEV_UNKNOWN)
 			cnt++;
 	return cnt;
 }
 
-static int ata_eh_skip_recovery(struct ata_port *ap)
+static int ata_eh_skip_recovery(struct ata_link *link)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_eh_context *ehc = &link->eh_context;
 	struct ata_device *dev;
 
 	/* thaw frozen port, resume link and recover failed devices */
-	if ((ap->pflags & ATA_PFLAG_FROZEN) ||
-	    (ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_port_nr_enabled(ap))
+	if ((link->ap->pflags & ATA_PFLAG_FROZEN) ||
+	    (ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_link_nr_enabled(link))
 		return 0;
 
 	/* skip if class codes for all vacant slots are ATA_DEV_NONE */
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (dev->class == ATA_DEV_UNKNOWN &&
 		    ehc->classes[dev->devno] != ATA_DEV_NONE)
 			return 0;
@@ -2154,14 +2158,15 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 			  ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 			  ata_postreset_fn_t postreset)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
+	struct ata_link *link = &ap->link;
+	struct ata_eh_context *ehc = &link->eh_context;
 	struct ata_device *dev;
 	int rc;
 
 	DPRINTK("ENTER\n");
 
 	/* prep for recovery */
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
 
 		/* collect port action mask recorded in dev actions */
@@ -2191,20 +2196,20 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 		goto out;
 
 	/* skip EH if possible. */
-	if (ata_eh_skip_recovery(ap))
+	if (ata_eh_skip_recovery(link))
 		ehc->i.action = 0;
 
-	ata_link_for_each_dev(dev, &ap->link)
+	ata_link_for_each_dev(dev, link)
 		ehc->classes[dev->devno] = ATA_DEV_UNKNOWN;
 
 	/* reset */
 	if (ehc->i.action & ATA_EH_RESET_MASK) {
 		ata_eh_freeze_port(ap);
 
-		rc = ata_eh_reset(&ap->link, ata_port_nr_vacant(ap), prereset,
+		rc = ata_eh_reset(link, ata_link_nr_vacant(link), prereset,
 				  softreset, hardreset, postreset);
 		if (rc) {
-			ata_port_printk(ap, KERN_ERR,
+			ata_link_printk(link, KERN_ERR,
 					"reset failed, giving up\n");
 			goto out;
 		}
@@ -2213,13 +2218,13 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 	}
 
 	/* revalidate existing devices and attach new ones */
-	rc = ata_eh_revalidate_and_attach(ap, &dev);
+	rc = ata_eh_revalidate_and_attach(link, &dev);
 	if (rc)
 		goto dev_fail;
 
 	/* configure transfer mode if necessary */
 	if (ehc->i.flags & ATA_EHI_SETMODE) {
-		rc = ata_set_mode(ap, &dev);
+		rc = ata_set_mode(link, &dev);
 		if (rc)
 			goto dev_fail;
 		ehc->i.flags &= ~ATA_EHI_SETMODE;
@@ -2230,8 +2235,8 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
  dev_fail:
 	ata_eh_handle_dev_fail(dev, rc);
 
-	if (ata_port_nr_enabled(ap)) {
-		ata_port_printk(ap, KERN_WARNING, "failed to recover some "
+	if (ata_link_nr_enabled(link)) {
+		ata_link_printk(link, KERN_WARNING, "failed to recover some "
 				"devices, retrying in 5 secs\n");
 		ssleep(5);
 	} else {
@@ -2243,7 +2248,7 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 
  out:
 	if (rc) {
-		ata_link_for_each_dev(dev, &ap->link);
+		ata_link_for_each_dev(dev, link);
 			ata_dev_disable(dev);
 	}
 
@@ -2310,8 +2315,8 @@ void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
 	       ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 	       ata_postreset_fn_t postreset)
 {
-	ata_eh_autopsy(ap);
-	ata_eh_report(ap);
+	ata_eh_autopsy(&ap->link);
+	ata_eh_report(&ap->link);
 	ata_eh_recover(ap, prereset, softreset, hardreset, postreset);
 	ata_eh_finish(ap);
 }
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 700843a9f30..6d85edefa7c 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -81,7 +81,7 @@ extern int ata_dev_configure(struct ata_device *dev);
 extern int sata_down_spd_limit(struct ata_link *link);
 extern int sata_set_spd_needed(struct ata_link *link);
 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
-extern int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
+extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 extern void ata_sg_clean(struct ata_queued_cmd *qc);
 extern void ata_qc_free(struct ata_queued_cmd *qc);
 extern void ata_qc_issue(struct ata_queued_cmd *qc);
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 088eb1d2376..f32d9b7ab49 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -450,7 +450,7 @@ static unsigned int it821x_passthru_qc_issue_prot(struct ata_queued_cmd *qc)
 
 /**
  *	it821x_smart_set_mode	-	mode setting
- *	@ap: interface to set up
+ *	@link: interface to set up
  *	@unused: device that failed (error only)
  *
  *	Use a non standard set_mode function. We don't want to be tuned.
@@ -459,11 +459,11 @@ static unsigned int it821x_passthru_qc_issue_prot(struct ata_queued_cmd *qc)
  *	and respect them.
  */
 
-static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int it821x_smart_set_mode(struct ata_link *link, struct ata_device **unused)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 7db315a9baa..6bf1709508a 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -26,11 +26,11 @@
 #define DRV_NAME	"pata_ixp4xx_cf"
 #define DRV_VERSION	"0.2"
 
-static int ixp4xx_set_mode(struct ata_port *ap, struct ata_device **error)
+static int ixp4xx_set_mode(struct ata_link *link, struct ata_device **error)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			ata_dev_printk(dev, KERN_INFO, "configured for PIO0\n");
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 9d92843b033..cfb2bc86a1d 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -96,7 +96,7 @@ static int iordy_mask = 0xFFFFFFFF;	/* Use iordy if available */
 
 /**
  *	legacy_set_mode		-	mode setting
- *	@ap: IDE interface
+ *	@link: IDE link
  *	@unused: Device that failed when error is returned
  *
  *	Use a non standard set_mode function. We don't want to be tuned.
@@ -107,11 +107,11 @@ static int iordy_mask = 0xFFFFFFFF;	/* Use iordy if available */
  *	expand on this as per hdparm in the base kernel.
  */
 
-static int legacy_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int legacy_set_mode(struct ata_link *link, struct ata_device **unused)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_optidma.c b/drivers/ata/pata_optidma.c
index 39fcba80007..09ef725afd9 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -324,25 +324,26 @@ static u8 optidma_make_bits43(struct ata_device *adev)
 
 /**
  *	optidma_set_mode	-	mode setup
- *	@ap: port to set up
+ *	@link: link to set up
  *
  *	Use the standard setup to tune the chipset and then finalise the
  *	configuration by writing the nibble of extra bits of data into
  *	the chip.
  */
 
-static int optidma_set_mode(struct ata_port *ap, struct ata_device **r_failed)
+static int optidma_set_mode(struct ata_link *link, struct ata_device **r_failed)
 {
+	struct ata_port *ap = link->ap;
 	u8 r;
 	int nybble = 4 * ap->port_no;
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
-	int rc  = ata_do_set_mode(ap, r_failed);
+	int rc  = ata_do_set_mode(link, r_failed);
 	if (rc == 0) {
 		pci_read_config_byte(pdev, 0x43, &r);
 
 		r &= (0x0F << nybble);
-		r |= (optidma_make_bits43(&ap->link.device[0]) +
-		     (optidma_make_bits43(&ap->link.device[0]) << 2)) << nybble;
+		r |= (optidma_make_bits43(&link->device[0]) +
+		     (optidma_make_bits43(&link->device[0]) << 2)) << nybble;
 		pci_write_config_byte(pdev, 0x43, r);
 	}
 	return rc;
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index 890f649ddcc..9bfe12ac851 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -56,7 +56,7 @@ struct ata_pcmcia_info {
 
 /**
  *	pcmcia_set_mode	-	PCMCIA specific mode setup
- *	@ap: Port
+ *	@link: link
  *	@r_failed_dev: Return pointer for failed device
  *
  *	Perform the tuning and setup of the devices and timings, which
@@ -65,13 +65,13 @@ struct ata_pcmcia_info {
  *	decode, which alas is embarrassingly common in the PC world
  */
 
-static int pcmcia_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+static int pcmcia_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 {
-	struct ata_device *master = &ap->link.device[0];
-	struct ata_device *slave = &ap->link.device[1];
+	struct ata_device *master = &link->device[0];
+	struct ata_device *slave = &link->device[1];
 
 	if (!ata_dev_enabled(master) || !ata_dev_enabled(slave))
-		return ata_do_set_mode(ap, r_failed_dev);
+		return ata_do_set_mode(link, r_failed_dev);
 
 	if (memcmp(master->id + ATA_ID_FW_REV,  slave->id + ATA_ID_FW_REV,
 			   ATA_ID_FW_REV_LEN + ATA_ID_PROD_LEN) == 0)
@@ -84,7 +84,7 @@ static int pcmcia_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev
 			ata_dev_disable(slave);
 		}
 	}
-	return ata_do_set_mode(ap, r_failed_dev);
+	return ata_do_set_mode(link, r_failed_dev);
 }
 
 static struct scsi_host_template pcmcia_sht = {
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index ba39efbe540..db069d7515b 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -69,7 +69,7 @@ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);
 static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc);
 static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask);
 static int pdc2027x_cable_detect(struct ata_port *ap);
-static int pdc2027x_set_mode(struct ata_port *ap, struct ata_device **r_failed);
+static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed);
 
 /*
  * ATA Timing Tables based on 133MHz controller clock.
@@ -470,23 +470,24 @@ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 
 /**
  *	pdc2027x_set_mode - Set the timing registers back to correct values.
- *	@ap: Port to configure
+ *	@link: link to configure
  *	@r_failed: Returned device for failure
  *
  *	The pdc2027x hardware will look at "SET FEATURES" and change the timing registers
  *	automatically. The values set by the hardware might be incorrect, under 133Mhz PLL.
  *	This function overwrites the possibly incorrect values set by the hardware to be correct.
  */
-static int pdc2027x_set_mode(struct ata_port *ap, struct ata_device **r_failed)
+static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed)
 {
+	struct ata_port *ap = link->ap;
 	struct ata_device *dev;
 	int rc;
 
-	rc = ata_do_set_mode(ap, r_failed);
+	rc = ata_do_set_mode(link, r_failed);
 	if (rc < 0)
 		return rc;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 
 			pdc2027x_set_piomode(ap, dev);
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index ee1605bfc29..37e5158391d 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -30,11 +30,11 @@ static int pio_mask = 1;
  * Provide our own set_mode() as we don't want to change anything that has
  * already been configured..
  */
-static int pata_platform_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index 300b3d5de81..de3698cf3b8 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -26,7 +26,7 @@
 
 /**
  *	rz1000_set_mode		-	mode setting function
- *	@ap: ATA interface
+ *	@link: ATA link
  *	@unused: returned device on set_mode failure
  *
  *	Use a non standard set_mode function. We don't want to be tuned. We
@@ -34,11 +34,11 @@
  *	whacked out.
  */
 
-static int rz1000_set_mode(struct ata_port *ap, struct ata_device **unused)
+static int rz1000_set_mode(struct ata_link *link, struct ata_device **unused)
 {
 	struct ata_device *dev;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (ata_dev_enabled(dev)) {
 			/* We don't really care */
 			dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index 064a3b50560..304c19b9b0f 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -297,15 +297,16 @@ static void adma_thaw(struct ata_port *ap)
 	adma_reinit_engine(ap);
 }
 
-static int adma_prereset(struct ata_port *ap, unsigned long deadline)
+static int adma_prereset(struct ata_link *link, unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	struct adma_port_priv *pp = ap->private_data;
 
 	if (pp->state != adma_state_idle) /* healthy paranoia */
 		pp->state = adma_state_mmio;
 	adma_reinit_engine(ap);
 
-	return ata_std_prereset(ap, deadline);
+	return ata_std_prereset(link, deadline);
 }
 
 static void adma_error_handler(struct ata_port *ap)
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 4c9295a49a4..5cd3eb83e4a 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -117,7 +117,7 @@ static int sil_pci_device_resume(struct pci_dev *pdev);
 static void sil_dev_config(struct ata_device *dev);
 static int sil_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
 static int sil_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
-static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed);
+static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
 static void sil_freeze(struct ata_port *ap);
 static void sil_thaw(struct ata_port *ap);
 
@@ -290,27 +290,27 @@ static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
 
 /**
  *	sil_set_mode		-	wrap set_mode functions
- *	@ap: port to set up
+ *	@link: link to set up
  *	@r_failed: returned device when we fail
  *
  *	Wrap the libata method for device setup as after the setup we need
  *	to inspect the results and do some configuration work
  */
 
-static int sil_set_mode (struct ata_port *ap, struct ata_device **r_failed)
+static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
 {
-	struct ata_host *host = ap->host;
-	struct ata_device *dev;
-	void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
+	struct ata_port *ap = link->ap;
+	void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
 	void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
+	struct ata_device *dev;
 	u32 tmp, dev_mode[2] = { };
 	int rc;
 
-	rc = ata_do_set_mode(ap, r_failed);
+	rc = ata_do_set_mode(link, r_failed);
 	if (rc)
 		return rc;
 
-	ata_link_for_each_dev(dev, &ap->link) {
+	ata_link_for_each_dev(dev, link) {
 		if (!ata_dev_enabled(dev))
 			dev_mode[dev->devno] = 0;	/* PIO0/1/2 */
 		else if (dev->flags & ATA_DFLAG_PIO)
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 25444dafae5..0f86d9be78a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -607,7 +607,7 @@ struct ata_port_operations {
 	void (*dev_select)(struct ata_port *ap, unsigned int device);
 
 	void (*phy_reset) (struct ata_port *ap); /* obsolete */
-	int  (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev);
+	int  (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
 
 	int (*cable_detect) (struct ata_port *ap);
 
@@ -838,7 +838,7 @@ extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
 				       int queue_depth);
 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
-extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
+extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 extern u8 ata_irq_on(struct ata_port *ap);
 extern u8 ata_dummy_irq_on(struct ata_port *ap);
 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
-- 
cgit v1.2.3-70-g09d2


From 0c88758b5a6325428aaadab619886242db20ceae Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: make two port flags HRST_TO_RESUME and SKIP_D2H_BSY link
 flags

HRST_TO_RESUME and SKIP_D2H_BSY are link attributes.  Move them to
ata_link->flags.  This will allow host and PMP links to have different
attributes.  ata_port_info->link_flags is added and used by LLDs to
specify these flags during initialization.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c        | 16 ++++++++++------
 drivers/ata/libata-core.c |  5 +++--
 drivers/ata/sata_nv.c     | 14 +++++++-------
 drivers/ata/sata_sil.c    |  7 ++++++-
 drivers/ata/sata_sil24.c  |  7 +++++--
 include/linux/libata.h    | 11 ++++++++---
 6 files changed, 39 insertions(+), 21 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index e38ae12d014..483733783cf 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -178,8 +178,8 @@ enum {
 
 	AHCI_FLAG_COMMON		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 					  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-					  ATA_FLAG_SKIP_D2H_BSY |
 					  ATA_FLAG_ACPI_SATA,
+	AHCI_LFLAG_COMMON		= ATA_LFLAG_SKIP_D2H_BSY,
 };
 
 struct ahci_cmd_hdr {
@@ -333,6 +333,7 @@ static const struct ata_port_info ahci_port_info[] = {
 	/* board_ahci */
 	{
 		.flags		= AHCI_FLAG_COMMON,
+		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
@@ -340,14 +341,15 @@ static const struct ata_port_info ahci_port_info[] = {
 	/* board_ahci_pi */
 	{
 		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_HONOR_PI,
+		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
 	},
 	/* board_ahci_vt8251 */
 	{
-		.flags		= AHCI_FLAG_COMMON | ATA_FLAG_HRST_TO_RESUME |
-				  AHCI_FLAG_NO_NCQ,
+		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_NO_NCQ,
+		.link_flags	= AHCI_LFLAG_COMMON | ATA_LFLAG_HRST_TO_RESUME,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_vt8251_ops,
@@ -355,6 +357,7 @@ static const struct ata_port_info ahci_port_info[] = {
 	/* board_ahci_ign_iferr */
 	{
 		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_IGN_IRQ_IF_ERR,
+		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
@@ -364,6 +367,7 @@ static const struct ata_port_info ahci_port_info[] = {
 		.flags		= AHCI_FLAG_COMMON |
 				  AHCI_FLAG_IGN_SERR_INTERNAL |
 				  AHCI_FLAG_32BIT_ONLY,
+		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
@@ -373,9 +377,9 @@ static const struct ata_port_info ahci_port_info[] = {
 		.sht		= &ahci_sht,
 		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 				  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-				  ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_HONOR_PI |
-				  AHCI_FLAG_NO_NCQ | AHCI_FLAG_NO_MSI |
-				  AHCI_FLAG_MV_PATA,
+				  AHCI_FLAG_HONOR_PI | AHCI_FLAG_NO_NCQ |
+				  AHCI_FLAG_NO_MSI | AHCI_FLAG_MV_PATA,
+		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 944f54457c8..2be30c7a222 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3332,7 +3332,7 @@ int ata_std_prereset(struct ata_link *link, unsigned long deadline)
 
 	/* handle link resume */
 	if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
-	    (ap->flags & ATA_FLAG_HRST_TO_RESUME))
+	    (link->flags & ATA_LFLAG_HRST_TO_RESUME))
 		ehc->i.action |= ATA_EH_HARDRESET;
 
 	/* if we're about to do hardreset, nothing more to do */
@@ -3351,7 +3351,7 @@ int ata_std_prereset(struct ata_link *link, unsigned long deadline)
 	/* Wait for !BSY if the controller can wait for the first D2H
 	 * Reg FIS and we don't know that no device is attached.
 	 */
-	if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
+	if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) {
 		rc = ata_wait_ready(ap, deadline);
 		if (rc && rc != -ENODEV) {
 			ata_link_printk(link, KERN_WARNING, "device not ready "
@@ -6269,6 +6269,7 @@ struct ata_host *ata_host_alloc_pinfo(struct device *dev,
 		ap->mwdma_mask = pi->mwdma_mask;
 		ap->udma_mask = pi->udma_mask;
 		ap->flags |= pi->flags;
+		ap->link.flags |= pi->link_flags;
 		ap->ops = pi->port_ops;
 
 		if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 67ba0f75f1e..884d9f05e6c 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -455,8 +455,8 @@ static const struct ata_port_info nv_port_info[] = {
 	/* generic */
 	{
 		.sht		= &nv_sht,
-		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_HRST_TO_RESUME,
+		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+		.link_flags	= ATA_LFLAG_HRST_TO_RESUME,
 		.pio_mask	= NV_PIO_MASK,
 		.mwdma_mask	= NV_MWDMA_MASK,
 		.udma_mask	= NV_UDMA_MASK,
@@ -466,8 +466,8 @@ static const struct ata_port_info nv_port_info[] = {
 	/* nforce2/3 */
 	{
 		.sht		= &nv_sht,
-		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_HRST_TO_RESUME,
+		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+		.link_flags	= ATA_LFLAG_HRST_TO_RESUME,
 		.pio_mask	= NV_PIO_MASK,
 		.mwdma_mask	= NV_MWDMA_MASK,
 		.udma_mask	= NV_UDMA_MASK,
@@ -477,8 +477,8 @@ static const struct ata_port_info nv_port_info[] = {
 	/* ck804 */
 	{
 		.sht		= &nv_sht,
-		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_HRST_TO_RESUME,
+		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+		.link_flags	= ATA_LFLAG_HRST_TO_RESUME,
 		.pio_mask	= NV_PIO_MASK,
 		.mwdma_mask	= NV_MWDMA_MASK,
 		.udma_mask	= NV_UDMA_MASK,
@@ -489,8 +489,8 @@ static const struct ata_port_info nv_port_info[] = {
 	{
 		.sht		= &nv_adma_sht,
 		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_HRST_TO_RESUME |
 				  ATA_FLAG_MMIO | ATA_FLAG_NCQ,
+		.link_flags	= ATA_LFLAG_HRST_TO_RESUME,
 		.pio_mask	= NV_PIO_MASK,
 		.mwdma_mask	= NV_MWDMA_MASK,
 		.udma_mask	= NV_UDMA_MASK,
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 5cd3eb83e4a..802d679dc99 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -59,7 +59,8 @@ enum {
 	SIL_FLAG_MOD15WRITE	= (1 << 30),
 
 	SIL_DFL_PORT_FLAGS	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_MMIO | ATA_FLAG_HRST_TO_RESUME,
+				  ATA_FLAG_MMIO,
+	SIL_DFL_LINK_FLAGS	= ATA_LFLAG_HRST_TO_RESUME,
 
 	/*
 	 * Controller IDs
@@ -216,6 +217,7 @@ static const struct ata_port_info sil_port_info[] = {
 	/* sil_3112 */
 	{
 		.flags		= SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
+		.link_flags	= SIL_DFL_LINK_FLAGS,
 		.pio_mask	= 0x1f,			/* pio0-4 */
 		.mwdma_mask	= 0x07,			/* mwdma0-2 */
 		.udma_mask	= ATA_UDMA5,
@@ -225,6 +227,7 @@ static const struct ata_port_info sil_port_info[] = {
 	{
 		.flags		= SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
 				  SIL_FLAG_NO_SATA_IRQ,
+		.link_flags	= SIL_DFL_LINK_FLAGS,
 		.pio_mask	= 0x1f,			/* pio0-4 */
 		.mwdma_mask	= 0x07,			/* mwdma0-2 */
 		.udma_mask	= ATA_UDMA5,
@@ -233,6 +236,7 @@ static const struct ata_port_info sil_port_info[] = {
 	/* sil_3512 */
 	{
 		.flags		= SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
+		.link_flags	= SIL_DFL_LINK_FLAGS,
 		.pio_mask	= 0x1f,			/* pio0-4 */
 		.mwdma_mask	= 0x07,			/* mwdma0-2 */
 		.udma_mask	= ATA_UDMA5,
@@ -241,6 +245,7 @@ static const struct ata_port_info sil_port_info[] = {
 	/* sil_3114 */
 	{
 		.flags		= SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
+		.link_flags	= SIL_DFL_LINK_FLAGS,
 		.pio_mask	= 0x1f,			/* pio0-4 */
 		.mwdma_mask	= 0x07,			/* mwdma0-2 */
 		.udma_mask	= ATA_UDMA5,
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 869e414d7ed..e2cccc7f435 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -237,8 +237,8 @@ enum {
 	/* host flags */
 	SIL24_COMMON_FLAGS	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 				  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-				  ATA_FLAG_NCQ | ATA_FLAG_SKIP_D2H_BSY |
-				  ATA_FLAG_ACPI_SATA,
+				  ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA,
+	SIL24_COMMON_LFLAGS	= ATA_LFLAG_SKIP_D2H_BSY,
 	SIL24_FLAG_PCIX_IRQ_WOC	= (1 << 24), /* IRQ loss errata on PCI-X */
 
 	IRQ_STAT_4PORTS		= 0xf,
@@ -424,6 +424,7 @@ static const struct ata_port_info sil24_port_info[] = {
 	{
 		.flags		= SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) |
 				  SIL24_FLAG_PCIX_IRQ_WOC,
+		.link_flags	= SIL24_COMMON_LFLAGS,
 		.pio_mask	= 0x1f,			/* pio0-4 */
 		.mwdma_mask	= 0x07,			/* mwdma0-2 */
 		.udma_mask	= ATA_UDMA5,		/* udma0-5 */
@@ -432,6 +433,7 @@ static const struct ata_port_info sil24_port_info[] = {
 	/* sil_3132 */
 	{
 		.flags		= SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2),
+		.link_flags	= SIL24_COMMON_LFLAGS,
 		.pio_mask	= 0x1f,			/* pio0-4 */
 		.mwdma_mask	= 0x07,			/* mwdma0-2 */
 		.udma_mask	= ATA_UDMA5,		/* udma0-5 */
@@ -440,6 +442,7 @@ static const struct ata_port_info sil24_port_info[] = {
 	/* sil_3131/sil_3531 */
 	{
 		.flags		= SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1),
+		.link_flags	= SIL24_COMMON_LFLAGS,
 		.pio_mask	= 0x1f,			/* pio0-4 */
 		.mwdma_mask	= 0x07,			/* mwdma0-2 */
 		.udma_mask	= ATA_UDMA5,		/* udma0-5 */
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 0f86d9be78a..74ced08d598 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -156,6 +156,11 @@ enum {
 	ATA_DEV_ATAPI_UNSUP	= 4,	/* ATAPI device (unsupported) */
 	ATA_DEV_NONE		= 5,	/* no device */
 
+	/* struct ata_link flags */
+	ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
+	ATA_LFLAG_SKIP_D2H_BSY	= (1 << 1), /* can't wait for the first D2H
+					     * Register FIS clearing BSY */
+
 	/* struct ata_port flags */
 	ATA_FLAG_SLAVE_POSS	= (1 << 0), /* host supports slave dev */
 					    /* (doesn't imply presence) */
@@ -170,9 +175,6 @@ enum {
 	ATA_FLAG_PIO_POLLING	= (1 << 9), /* use polling PIO if LLD
 					     * doesn't handle PIO interrupts */
 	ATA_FLAG_NCQ		= (1 << 10), /* host supports NCQ */
-	ATA_FLAG_HRST_TO_RESUME	= (1 << 11), /* hardreset to resume phy */
-	ATA_FLAG_SKIP_D2H_BSY	= (1 << 12), /* can't wait for the first D2H
-					      * Register FIS clearing BSY */
 	ATA_FLAG_DEBUGMSG	= (1 << 13),
 	ATA_FLAG_IGN_SIMPLEX	= (1 << 15), /* ignore SIMPLEX */
 	ATA_FLAG_NO_IORDY	= (1 << 16), /* controller lacks iordy */
@@ -517,6 +519,8 @@ struct ata_link {
 	unsigned int		active_tag;	/* active tag on this link */
 	u32			sactive;	/* active NCQ commands */
 
+	unsigned int		flags;		/* ATA_LFLAG_xxx */
+
 	unsigned int		hw_sata_spd_limit;
 	unsigned int		sata_spd_limit;
 	unsigned int		sata_spd;	/* current SATA PHY speed */
@@ -654,6 +658,7 @@ struct ata_port_operations {
 struct ata_port_info {
 	struct scsi_host_template	*sht;
 	unsigned long		flags;
+	unsigned long		link_flags;
 	unsigned long		pio_mask;
 	unsigned long		mwdma_mask;
 	unsigned long		udma_mask;
-- 
cgit v1.2.3-70-g09d2


From 4fb37a25b976e8d1b34461330b3f2c6d9b94c133 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: separate out link initialization functions

Separate out link initialization into ata_link_init() and
ata_link_init_sata_spd().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 84 ++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 64 insertions(+), 20 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 2be30c7a222..3da642bd2ee 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6060,6 +6060,68 @@ void ata_dev_init(struct ata_device *dev)
 	dev->udma_mask = UINT_MAX;
 }
 
+/**
+ *	ata_link_init - Initialize an ata_link structure
+ *	@ap: ATA port link is attached to
+ *	@link: Link structure to initialize
+ *
+ *	Initialize @link.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep)
+ */
+static void ata_link_init(struct ata_port *ap, struct ata_link *link)
+{
+	int i;
+
+	/* clear everything except for devices */
+	memset(link, 0, offsetof(struct ata_link, device[0]));
+
+	link->ap = ap;
+	link->active_tag = ATA_TAG_POISON;
+	link->hw_sata_spd_limit = UINT_MAX;
+
+	/* can't use iterator, ap isn't initialized yet */
+	for (i = 0; i < ATA_MAX_DEVICES; i++) {
+		struct ata_device *dev = &link->device[i];
+
+		dev->link = link;
+		dev->devno = dev - link->device;
+		ata_dev_init(dev);
+	}
+}
+
+/**
+ *	sata_link_init_spd - Initialize link->sata_spd_limit
+ *	@link: Link to configure sata_spd_limit for
+ *
+ *	Initialize @link->[hw_]sata_spd_limit to the currently
+ *	configured value.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+static int sata_link_init_spd(struct ata_link *link)
+{
+	u32 scontrol, spd;
+	int rc;
+
+	rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
+	if (rc)
+		return rc;
+
+	spd = (scontrol >> 4) & 0xf;
+	if (spd)
+		link->hw_sata_spd_limit &= (1 << spd) - 1;
+
+	link->sata_spd_limit = link->hw_sata_spd_limit;
+
+	return 0;
+}
+
 /**
  *	ata_port_alloc - allocate and initialize basic ATA port resources
  *	@host: ATA host this allocated port belongs to
@@ -6075,7 +6137,6 @@ void ata_dev_init(struct ata_device *dev)
 struct ata_port *ata_port_alloc(struct ata_host *host)
 {
 	struct ata_port *ap;
-	unsigned int i;
 
 	DPRINTK("ENTER\n");
 
@@ -6090,9 +6151,6 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 	ap->ctl = ATA_DEVCTL_OBS;
 	ap->host = host;
 	ap->dev = host->dev;
-
-	ap->link.hw_sata_spd_limit = UINT_MAX;
-	ap->link.active_tag = ATA_TAG_POISON;
 	ap->last_ctl = 0xFF;
 
 #if defined(ATA_VERBOSE_DEBUG)
@@ -6115,15 +6173,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 
 	ap->cbl = ATA_CBL_NONE;
 
-	ap->link.ap = ap;
-
-	/* can't use iterator, ap isn't initialized yet */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->link.device[i];
-		dev->link = &ap->link;
-		dev->devno = i;
-		ata_dev_init(dev);
-	}
+	ata_link_init(ap, &ap->link);
 
 #ifdef ATA_IRQ_TRAP
 	ap->stats.unhandled_irq = 1;
@@ -6406,7 +6456,6 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 	for (i = 0; i < host->n_ports; i++) {
 		struct ata_port *ap = host->ports[i];
 		int irq_line;
-		u32 scontrol;
 		unsigned long xfer_mask;
 
 		/* set SATA cable type if still unset */
@@ -6414,12 +6463,7 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 			ap->cbl = ATA_CBL_SATA;
 
 		/* init sata_spd_limit to the current value */
-		if (sata_scr_read(&ap->link, SCR_CONTROL, &scontrol) == 0) {
-			int spd = (scontrol >> 4) & 0xf;
-			if (spd)
-				ap->link.hw_sata_spd_limit &= (1 << spd) - 1;
-		}
-		ap->link.sata_spd_limit = ap->link.hw_sata_spd_limit;
+		sata_link_init_spd(&ap->link);
 
 		/* report the secondary IRQ for second channel legacy */
 		irq_line = host->irq;
-- 
cgit v1.2.3-70-g09d2


From dbd826168d6267a26cf20cd233f6730f8d8047d6 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: implement ata_link_abort()

Implement ata_link_abort().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c |  1 +
 drivers/ata/libata-eh.c   | 50 ++++++++++++++++++++++++++++++++++-------------
 include/linux/libata.h    |  1 +
 3 files changed, 38 insertions(+), 14 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 3da642bd2ee..dcae590cc9b 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -7050,6 +7050,7 @@ EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
 EXPORT_SYMBOL_GPL(ata_eng_timeout);
 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
+EXPORT_SYMBOL_GPL(ata_link_abort);
 EXPORT_SYMBOL_GPL(ata_port_abort);
 EXPORT_SYMBOL_GPL(ata_port_freeze);
 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 733aa761f3e..eb4c0593b40 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -719,19 +719,7 @@ void ata_port_schedule_eh(struct ata_port *ap)
 	DPRINTK("port EH scheduled\n");
 }
 
-/**
- *	ata_port_abort - abort all qc's on the port
- *	@ap: ATA port to abort qc's for
- *
- *	Abort all active qc's of @ap and schedule EH.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host lock)
- *
- *	RETURNS:
- *	Number of aborted qc's.
- */
-int ata_port_abort(struct ata_port *ap)
+static int ata_do_link_abort(struct ata_port *ap, struct ata_link *link)
 {
 	int tag, nr_aborted = 0;
 
@@ -743,7 +731,7 @@ int ata_port_abort(struct ata_port *ap)
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
 		struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag);
 
-		if (qc) {
+		if (qc && (!link || qc->dev->link == link)) {
 			qc->flags |= ATA_QCFLAG_FAILED;
 			ata_qc_complete(qc);
 			nr_aborted++;
@@ -756,6 +744,40 @@ int ata_port_abort(struct ata_port *ap)
 	return nr_aborted;
 }
 
+/**
+ *	ata_link_abort - abort all qc's on the link
+ *	@link: ATA link to abort qc's for
+ *
+ *	Abort all active qc's active on @link and schedule EH.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ *
+ *	RETURNS:
+ *	Number of aborted qc's.
+ */
+int ata_link_abort(struct ata_link *link)
+{
+	return ata_do_link_abort(link->ap, link);
+}
+
+/**
+ *	ata_port_abort - abort all qc's on the port
+ *	@ap: ATA port to abort qc's for
+ *
+ *	Abort all active qc's of @ap and schedule EH.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host_set lock)
+ *
+ *	RETURNS:
+ *	Number of aborted qc's.
+ */
+int ata_port_abort(struct ata_port *ap)
+{
+	return ata_do_link_abort(ap, NULL);
+}
+
 /**
  *	__ata_port_freeze - freeze port
  *	@ap: ATA port to freeze
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 74ced08d598..bfa15578999 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -906,6 +906,7 @@ extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
 extern void ata_eng_timeout(struct ata_port *ap);
 
 extern void ata_port_schedule_eh(struct ata_port *ap);
+extern int ata_link_abort(struct ata_link *link);
 extern int ata_port_abort(struct ata_port *ap);
 extern int ata_port_freeze(struct ata_port *ap);
 
-- 
cgit v1.2.3-70-g09d2


From 8989805d6d176aa32c0e9a68a536aa4c8ef5231c Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: add PMP links

Add link->pmp, ap->nr_pmp_links, ap->pmp_link[], and implement/update
link helpers.

printk helpers are updated such that port and link are identifed as
'ataP:' if no PMP is attached, while device is identified as
'ataP.DD:'.  If PMP is attached, they become 'ataP:', 'ataP.LL:' and
'ataP.LL' - ie. link and device are identified their PMP number.

If PPM is attached (ap->nr_pmp_links != 0), ata_for_each_link()
iterates over PMP links, while __ata_for_each_link() iterates over the
host link + PMP links.  If PMP is not attached (ap->nr_pmp_links ==
0), both iterate over only the host link.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c |  6 ++++--
 include/linux/libata.h    | 53 +++++++++++++++++++++++++++++++++++++++++------
 2 files changed, 51 insertions(+), 8 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index dcae590cc9b..af9c0ab600d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6064,13 +6064,14 @@ void ata_dev_init(struct ata_device *dev)
  *	ata_link_init - Initialize an ata_link structure
  *	@ap: ATA port link is attached to
  *	@link: Link structure to initialize
+ *	@pmp: Port multiplier port number
  *
  *	Initialize @link.
  *
  *	LOCKING:
  *	Kernel thread context (may sleep)
  */
-static void ata_link_init(struct ata_port *ap, struct ata_link *link)
+static void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
 {
 	int i;
 
@@ -6078,6 +6079,7 @@ static void ata_link_init(struct ata_port *ap, struct ata_link *link)
 	memset(link, 0, offsetof(struct ata_link, device[0]));
 
 	link->ap = ap;
+	link->pmp = pmp;
 	link->active_tag = ATA_TAG_POISON;
 	link->hw_sata_spd_limit = UINT_MAX;
 
@@ -6173,7 +6175,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
 
 	ap->cbl = ATA_CBL_NONE;
 
-	ata_link_init(ap, &ap->link);
+	ata_link_init(ap, &ap->link, 0);
 
 #ifdef ATA_IRQ_TRAP
 	ap->stats.unhandled_irq = 1;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index bfa15578999..7a1793bd237 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -515,6 +515,7 @@ struct ata_acpi_gtm {
 
 struct ata_link {
 	struct ata_port		*ap;
+	int			pmp;		/* port multiplier port # */
 
 	unsigned int		active_tag;	/* active tag on this link */
 	u32			sactive;	/* active NCQ commands */
@@ -563,6 +564,9 @@ struct ata_port {
 
 	struct ata_link		link;	/* host default link */
 
+	int			nr_pmp_links;	/* nr of available PMP links */
+	struct ata_link		*pmp_link;	/* array of PMP links */
+
 	struct ata_port_stats	stats;
 	struct ata_host		*host;
 	struct device 		*dev;
@@ -926,11 +930,17 @@ extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
 #define ata_port_printk(ap, lv, fmt, args...) \
 	printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
 
-#define ata_link_printk(link, lv, fmt, args...) \
-	printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args)
+#define ata_link_printk(link, lv, fmt, args...) do { \
+	if ((link)->ap->nr_pmp_links) \
+		printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \
+		       (link)->pmp , ##args); \
+	else \
+		printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \
+	} while(0)
 
 #define ata_dev_printk(dev, lv, fmt, args...) \
-	printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, (dev)->devno , ##args)
+	printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \
+	       (dev)->link->pmp + (dev)->devno , ##args)
 
 /*
  * ata_eh_info helpers
@@ -1039,15 +1049,46 @@ static inline unsigned int ata_dev_absent(const struct ata_device *dev)
 /*
  * link helpers
  */
+static inline int ata_is_host_link(const struct ata_link *link)
+{
+	return link == &link->ap->link;
+}
+
 static inline int ata_link_max_devices(const struct ata_link *link)
 {
-	if (link->ap->flags & ATA_FLAG_SLAVE_POSS)
+	if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
 		return 2;
 	return 1;
 }
 
-#define ata_port_for_each_link(lk, ap) \
-	for ((lk) = &(ap)->link; (lk); (lk) = NULL)
+static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
+{
+	if (ap->nr_pmp_links)
+		return ap->pmp_link;
+	return &ap->link;
+}
+
+static inline struct ata_link *ata_port_next_link(struct ata_link *link)
+{
+	struct ata_port *ap = link->ap;
+
+	if (link == &ap->link) {
+		if (!ap->nr_pmp_links)
+			return NULL;
+		return ap->pmp_link;
+	}
+
+	if (++link - ap->pmp_link < ap->nr_pmp_links)
+		return link;
+	return NULL;
+}
+
+#define __ata_port_for_each_link(lk, ap) \
+	for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
+
+#define ata_port_for_each_link(link, ap) \
+	for ((link) = ata_port_first_link(ap); (link); \
+	     (link) = ata_port_next_link(link))
 
 #define ata_link_for_each_dev(dev, link) \
 	for ((dev) = (link)->device; \
-- 
cgit v1.2.3-70-g09d2


From cf1b86c8ab41fe2b2a2eb59c9a2ea9a7e463653a Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:23 +0900
Subject: libata-link: update ata_scsi_error() to handle PMP links

Update ata_scsi_error() to handle PMP links.  As error conditions can
occur on both host and PMP links, __ata_port_for_each_link() is used.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index eb4c0593b40..45eb932c393 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -363,6 +363,8 @@ void ata_scsi_error(struct Scsi_Host *host)
  repeat:
 	/* invoke error handler */
 	if (ap->ops->error_handler) {
+		struct ata_link *link;
+
 		/* kill fast drain timer */
 		del_timer_sync(&ap->fastdrain_timer);
 
@@ -372,9 +374,11 @@ void ata_scsi_error(struct Scsi_Host *host)
 		/* fetch & clear EH info */
 		spin_lock_irqsave(ap->lock, flags);
 
-		memset(&ap->link.eh_context, 0, sizeof(ap->link.eh_context));
-		ap->link.eh_context.i = ap->link.eh_info;
-		memset(&ap->link.eh_info, 0, sizeof(ap->link.eh_info));
+		__ata_port_for_each_link(link, ap) {
+			memset(&link->eh_context, 0, sizeof(link->eh_context));
+			link->eh_context.i = link->eh_info;
+			memset(&link->eh_info, 0, sizeof(link->eh_info));
+		}
 
 		ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS;
 		ap->pflags &= ~ATA_PFLAG_EH_PENDING;
@@ -410,7 +414,8 @@ void ata_scsi_error(struct Scsi_Host *host)
 		}
 
 		/* this run is complete, make sure EH info is clear */
-		memset(&ap->link.eh_info, 0, sizeof(ap->link.eh_info));
+		__ata_port_for_each_link(link, ap)
+			memset(&link->eh_info, 0, sizeof(link->eh_info));
 
 		/* Clear host_eh_scheduled while holding ap->lock such
 		 * that if exception occurs after this point but
-- 
cgit v1.2.3-70-g09d2


From 9b1e2658faf3f3095a96558c333b333c0e29dbc0 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:24 +0900
Subject: libata-link: update EH to deal with PMP links

Update ata_eh_autopsy(), ata_eh_report(),
ata_eh_revalidate_and_attach() and ata_eh_recover() to deal with PMP
links.  ata_eh_autopsy() and ata_eh_report() updates are
straightforward.  They just repeat the same operation over all
configured links.  The only change to ata_eh_revalidate_and_attach()
is avoiding calling ->cable_select() on non-host ports.

ata_eh_recover() update is more complex as it first processes all
resets and then performs the rest.  This is necessary as thawing with
some links in unknown state can be dangerous.  ehi->action is cleared
on successful recovery of a link to avoid repeating recovery due to
failures in other links.

ata_eh_recover() iterates over only PMP links if PMP is attached, and,
on failure, the failing link is returned in @failed_link instead of
disabling devices directly.  These are to integrate ata_eh_recover()
into PMP EH later.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 228 +++++++++++++++++++++++++++++++++---------------
 1 file changed, 158 insertions(+), 70 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 45eb932c393..2ddc2ed9c29 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1578,8 +1578,8 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
 }
 
 /**
- *	ata_eh_autopsy - analyze error and determine recovery action
- *	@link: ATA link to perform autopsy on
+ *	ata_eh_link_autopsy - analyze error and determine recovery action
+ *	@link: host link to perform autopsy on
  *
  *	Analyze why @link failed and determine which recovery actions
  *	are needed.  This function also sets more detailed AC_ERR_*
@@ -1588,7 +1588,7 @@ static unsigned int ata_eh_speed_down(struct ata_device *dev, int is_io,
  *	LOCKING:
  *	Kernel thread context (may sleep).
  */
-static void ata_eh_autopsy(struct ata_link *link)
+static void ata_eh_link_autopsy(struct ata_link *link)
 {
 	struct ata_port *ap = link->ap;
 	struct ata_eh_context *ehc = &link->eh_context;
@@ -1680,7 +1680,25 @@ static void ata_eh_autopsy(struct ata_link *link)
 }
 
 /**
- *	ata_eh_report - report error handling to user
+ *	ata_eh_autopsy - analyze error and determine recovery action
+ *	@ap: host port to perform autopsy on
+ *
+ *	Analyze all links of @ap and determine why they failed and
+ *	which recovery actions are needed.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ */
+static void ata_eh_autopsy(struct ata_port *ap)
+{
+	struct ata_link *link;
+
+	__ata_port_for_each_link(link, ap)
+		ata_eh_link_autopsy(link);
+}
+
+/**
+ *	ata_eh_link_report - report error handling to user
  *	@link: ATA link EH is going on
  *
  *	Report EH to user.
@@ -1688,7 +1706,7 @@ static void ata_eh_autopsy(struct ata_link *link)
  *	LOCKING:
  *	None.
  */
-static void ata_eh_report(struct ata_link *link)
+static void ata_eh_link_report(struct ata_link *link)
 {
 	struct ata_port *ap = link->ap;
 	struct ata_eh_context *ehc = &link->eh_context;
@@ -1767,6 +1785,23 @@ static void ata_eh_report(struct ata_link *link)
 	}
 }
 
+/**
+ *	ata_eh_report - report error handling to user
+ *	@ap: ATA port to report EH about
+ *
+ *	Report EH to user.
+ *
+ *	LOCKING:
+ *	None.
+ */
+static void ata_eh_report(struct ata_port *ap)
+{
+	struct ata_link *link;
+
+	__ata_port_for_each_link(link, ap)
+		ata_eh_link_report(link);
+}
+
 static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset,
 			unsigned int *classes, unsigned long deadline)
 {
@@ -2036,7 +2071,8 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
 	}
 
 	/* PDIAG- should have been released, ask cable type if post-reset */
-	if ((ehc->i.flags & ATA_EHI_DID_RESET) && ap->ops->cable_detect)
+	if (ata_is_host_link(link) && ap->ops->cable_detect &&
+	    (ehc->i.flags & ATA_EHI_DID_RESET))
 		ap->cbl = ap->ops->cable_detect(ap);
 
 	/* Configure new devices forward such that user doesn't see
@@ -2110,7 +2146,7 @@ static int ata_eh_skip_recovery(struct ata_link *link)
 	return 1;
 }
 
-static void ata_eh_handle_dev_fail(struct ata_device *dev, int err)
+static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
 {
 	struct ata_eh_context *ehc = &dev->link->eh_context;
 
@@ -2151,12 +2187,16 @@ static void ata_eh_handle_dev_fail(struct ata_device *dev, int err)
 			ehc->did_probe_mask |= (1 << dev->devno);
 			ehc->i.action |= ATA_EH_SOFTRESET;
 		}
+
+		return 1;
 	} else {
 		/* soft didn't work?  be haaaaard */
 		if (ehc->i.flags & ATA_EHI_DID_RESET)
 			ehc->i.action |= ATA_EH_HARDRESET;
 		else
 			ehc->i.action |= ATA_EH_SOFTRESET;
+
+		return 0;
 	}
 }
 
@@ -2167,12 +2207,13 @@ static void ata_eh_handle_dev_fail(struct ata_device *dev, int err)
  *	@softreset: softreset method (can be NULL)
  *	@hardreset: hardreset method (can be NULL)
  *	@postreset: postreset method (can be NULL)
+ *	@r_failed_link: out parameter for failed link
  *
  *	This is the alpha and omega, eum and yang, heart and soul of
  *	libata exception handling.  On entry, actions required to
- *	recover the port and hotplug requests are recorded in
- *	eh_context.  This function executes all the operations with
- *	appropriate retrials and fallbacks to resurrect failed
+ *	recover each link and hotplug requests are recorded in the
+ *	link's eh_context.  This function executes all the operations
+ *	with appropriate retrials and fallbacks to resurrect failed
  *	devices, detach goners and greet newcomers.
  *
  *	LOCKING:
@@ -2183,102 +2224,139 @@ static void ata_eh_handle_dev_fail(struct ata_device *dev, int err)
  */
 static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 			  ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
-			  ata_postreset_fn_t postreset)
+			  ata_postreset_fn_t postreset,
+			  struct ata_link **r_failed_link)
 {
-	struct ata_link *link = &ap->link;
-	struct ata_eh_context *ehc = &link->eh_context;
+	struct ata_link *link;
 	struct ata_device *dev;
-	int rc;
+	int nr_failed_devs, nr_disabled_devs;
+	int reset, rc;
 
 	DPRINTK("ENTER\n");
 
 	/* prep for recovery */
-	ata_link_for_each_dev(dev, link) {
-		ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
+	ata_port_for_each_link(link, ap) {
+		struct ata_eh_context *ehc = &link->eh_context;
 
-		/* collect port action mask recorded in dev actions */
-		ehc->i.action |=
-			ehc->i.dev_action[dev->devno] & ~ATA_EH_PERDEV_MASK;
-		ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK;
-
-		/* process hotplug request */
-		if (dev->flags & ATA_DFLAG_DETACH)
-			ata_eh_detach_dev(dev);
+		ata_link_for_each_dev(dev, link) {
+			ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
 
-		if (!ata_dev_enabled(dev) &&
-		    ((ehc->i.probe_mask & (1 << dev->devno)) &&
-		     !(ehc->did_probe_mask & (1 << dev->devno)))) {
-			ata_eh_detach_dev(dev);
-			ata_dev_init(dev);
-			ehc->did_probe_mask |= (1 << dev->devno);
-			ehc->i.action |= ATA_EH_SOFTRESET;
+			/* collect port action mask recorded in dev actions */
+			ehc->i.action |= ehc->i.dev_action[dev->devno] &
+					 ~ATA_EH_PERDEV_MASK;
+			ehc->i.dev_action[dev->devno] &= ATA_EH_PERDEV_MASK;
+
+			/* process hotplug request */
+			if (dev->flags & ATA_DFLAG_DETACH)
+				ata_eh_detach_dev(dev);
+
+			if (!ata_dev_enabled(dev) &&
+			    ((ehc->i.probe_mask & (1 << dev->devno)) &&
+			     !(ehc->did_probe_mask & (1 << dev->devno)))) {
+				ata_eh_detach_dev(dev);
+				ata_dev_init(dev);
+				ehc->did_probe_mask |= (1 << dev->devno);
+				ehc->i.action |= ATA_EH_SOFTRESET;
+			}
 		}
 	}
 
  retry:
 	rc = 0;
+	nr_failed_devs = 0;
+	nr_disabled_devs = 0;
+	reset = 0;
 
 	/* if UNLOADING, finish immediately */
 	if (ap->pflags & ATA_PFLAG_UNLOADING)
 		goto out;
 
-	/* skip EH if possible. */
-	if (ata_eh_skip_recovery(link))
-		ehc->i.action = 0;
+	/* prep for EH */
+	ata_port_for_each_link(link, ap) {
+		struct ata_eh_context *ehc = &link->eh_context;
 
-	ata_link_for_each_dev(dev, link)
-		ehc->classes[dev->devno] = ATA_DEV_UNKNOWN;
+		/* skip EH if possible. */
+		if (ata_eh_skip_recovery(link))
+			ehc->i.action = 0;
+
+		/* do we need to reset? */
+		if (ehc->i.action & ATA_EH_RESET_MASK)
+			reset = 1;
+
+		ata_link_for_each_dev(dev, link)
+			ehc->classes[dev->devno] = ATA_DEV_UNKNOWN;
+	}
 
 	/* reset */
-	if (ehc->i.action & ATA_EH_RESET_MASK) {
+	if (reset) {
 		ata_eh_freeze_port(ap);
 
-		rc = ata_eh_reset(link, ata_link_nr_vacant(link), prereset,
-				  softreset, hardreset, postreset);
-		if (rc) {
-			ata_link_printk(link, KERN_ERR,
-					"reset failed, giving up\n");
-			goto out;
+		ata_port_for_each_link(link, ap) {
+			struct ata_eh_context *ehc = &link->eh_context;
+
+			if (!(ehc->i.action & ATA_EH_RESET_MASK))
+				continue;
+
+			rc = ata_eh_reset(link, ata_link_nr_vacant(link),
+					  prereset, softreset, hardreset,
+					  postreset);
+			if (rc) {
+				ata_link_printk(link, KERN_ERR,
+						"reset failed, giving up\n");
+				goto out;
+			}
 		}
 
 		ata_eh_thaw_port(ap);
 	}
 
-	/* revalidate existing devices and attach new ones */
-	rc = ata_eh_revalidate_and_attach(link, &dev);
-	if (rc)
-		goto dev_fail;
+	/* the rest */
+	ata_port_for_each_link(link, ap) {
+		struct ata_eh_context *ehc = &link->eh_context;
 
-	/* configure transfer mode if necessary */
-	if (ehc->i.flags & ATA_EHI_SETMODE) {
-		rc = ata_set_mode(link, &dev);
+		/* revalidate existing devices and attach new ones */
+		rc = ata_eh_revalidate_and_attach(link, &dev);
 		if (rc)
 			goto dev_fail;
-		ehc->i.flags &= ~ATA_EHI_SETMODE;
-	}
 
-	goto out;
+		/* configure transfer mode if necessary */
+		if (ehc->i.flags & ATA_EHI_SETMODE) {
+			rc = ata_set_mode(link, &dev);
+			if (rc)
+				goto dev_fail;
+			ehc->i.flags &= ~ATA_EHI_SETMODE;
+		}
+
+		/* this link is okay now */
+		ehc->i.flags = 0;
+		continue;
 
- dev_fail:
-	ata_eh_handle_dev_fail(dev, rc);
+	dev_fail:
+		nr_failed_devs++;
+		if (ata_eh_handle_dev_fail(dev, rc))
+			nr_disabled_devs++;
 
-	if (ata_link_nr_enabled(link)) {
-		ata_link_printk(link, KERN_WARNING, "failed to recover some "
-				"devices, retrying in 5 secs\n");
-		ssleep(5);
-	} else {
-		/* no device left, repeat fast */
-		msleep(500);
+		if (ap->pflags & ATA_PFLAG_FROZEN)
+			break;
 	}
 
-	goto retry;
+	if (nr_failed_devs) {
+		if (nr_failed_devs != nr_disabled_devs) {
+			ata_port_printk(ap, KERN_WARNING, "failed to recover "
+					"some devices, retrying in 5 secs\n");
+			ssleep(5);
+		} else {
+			/* no device left to recover, repeat fast */
+			msleep(500);
+		}
 
- out:
-	if (rc) {
-		ata_link_for_each_dev(dev, link);
-			ata_dev_disable(dev);
+		goto retry;
 	}
 
+ out:
+	if (rc && r_failed_link)
+		*r_failed_link = link;
+
 	DPRINTK("EXIT, rc=%d\n", rc);
 	return rc;
 }
@@ -2342,9 +2420,19 @@ void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
 	       ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 	       ata_postreset_fn_t postreset)
 {
-	ata_eh_autopsy(&ap->link);
-	ata_eh_report(&ap->link);
-	ata_eh_recover(ap, prereset, softreset, hardreset, postreset);
+	struct ata_device *dev;
+	int rc;
+
+	ata_eh_autopsy(ap);
+	ata_eh_report(ap);
+
+	rc = ata_eh_recover(ap, prereset, softreset, hardreset, postreset,
+			    NULL);
+	if (rc) {
+		ata_link_for_each_dev(dev, &ap->link)
+			ata_dev_disable(dev);
+	}
+
 	ata_eh_finish(ap);
 }
 
-- 
cgit v1.2.3-70-g09d2


From 41bda9c98035dd3589b02cbc1de02f71d2faf9c8 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:24 +0900
Subject: libata-link: update hotplug to handle PMP links

Update hotplug to handle PMP links.  When PMP is attached, the PMP
number corresponds to C of SCSI H:C:I:L.  While at it, change argument
to ata_find_dev() to @devno from @id to avoid confusion with SCSI
device ID.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c |   7 +-
 drivers/ata/libata-scsi.c | 159 +++++++++++++++++++++++++++++++---------------
 2 files changed, 114 insertions(+), 52 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index af9c0ab600d..14f299278f1 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6604,6 +6604,7 @@ int ata_host_activate(struct ata_host *host, int irq,
 void ata_port_detach(struct ata_port *ap)
 {
 	unsigned long flags;
+	struct ata_link *link;
 	struct ata_device *dev;
 
 	if (!ap->ops->error_handler)
@@ -6621,8 +6622,10 @@ void ata_port_detach(struct ata_port *ap)
 	 */
 	spin_lock_irqsave(ap->lock, flags);
 
-	ata_link_for_each_dev(dev, &ap->link)
-		ata_dev_disable(dev);
+	ata_port_for_each_link(link, ap) {
+		ata_link_for_each_dev(dev, link)
+			ata_dev_disable(dev);
+	}
 
 	spin_unlock_irqrestore(ap->lock, flags);
 
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 3d6d5f73799..58051ee40f1 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2423,21 +2423,36 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
 	return 0;
 }
 
-static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
+static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
 {
-	if (likely(id < ata_link_max_devices(&ap->link)))
-		return &ap->link.device[id];
+	if (ap->nr_pmp_links == 0) {
+		if (likely(devno < ata_link_max_devices(&ap->link)))
+			return &ap->link.device[devno];
+	} else {
+		if (likely(devno < ap->nr_pmp_links))
+			return &ap->pmp_link[devno].device[0];
+	}
+
 	return NULL;
 }
 
 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
 					const struct scsi_device *scsidev)
 {
+	int devno;
+
 	/* skip commands not addressed to targets we simulate */
-	if (unlikely(scsidev->channel || scsidev->lun))
-		return NULL;
+	if (ap->nr_pmp_links == 0) {
+		if (unlikely(scsidev->channel || scsidev->lun))
+			return NULL;
+		devno = scsidev->id;
+	} else {
+		if (unlikely(scsidev->id || scsidev->lun))
+			return NULL;
+		devno = scsidev->channel;
+	}
 
-	return ata_find_dev(ap, scsidev->id);
+	return ata_find_dev(ap, devno);
 }
 
 /**
@@ -2951,22 +2966,32 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
 {
 	int tries = 5;
 	struct ata_device *last_failed_dev = NULL;
+	struct ata_link *link;
 	struct ata_device *dev;
 
 	if (ap->flags & ATA_FLAG_DISABLED)
 		return;
 
  repeat:
-	ata_link_for_each_dev(dev, &ap->link) {
-		struct scsi_device *sdev;
+	ata_port_for_each_link(link, ap) {
+		ata_link_for_each_dev(dev, link) {
+			struct scsi_device *sdev;
+			int channel = 0, id = 0;
 
-		if (!ata_dev_enabled(dev) || dev->sdev)
-			continue;
+			if (!ata_dev_enabled(dev) || dev->sdev)
+				continue;
 
-		sdev = __scsi_add_device(ap->scsi_host, 0, dev->devno, 0, NULL);
-		if (!IS_ERR(sdev)) {
-			dev->sdev = sdev;
-			scsi_device_put(sdev);
+			if (ata_is_host_link(link))
+				id = dev->devno;
+			else
+				channel = link->pmp;
+
+			sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
+						 NULL);
+			if (!IS_ERR(sdev)) {
+				dev->sdev = sdev;
+				scsi_device_put(sdev);
+			}
 		}
 	}
 
@@ -2974,11 +2999,14 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
 	 * failure occurred, scan would have failed silently.  Check
 	 * whether all devices are attached.
 	 */
-	ata_link_for_each_dev(dev, &ap->link) {
-		if (ata_dev_enabled(dev) && !dev->sdev)
-			break;
+	ata_port_for_each_link(link, ap) {
+		ata_link_for_each_dev(dev, link) {
+			if (ata_dev_enabled(dev) && !dev->sdev)
+				goto exit_loop;
+		}
 	}
-	if (!dev)
+ exit_loop:
+	if (!link)
 		return;
 
 	/* we're missing some SCSI devices */
@@ -3092,6 +3120,25 @@ static void ata_scsi_remove_dev(struct ata_device *dev)
 	}
 }
 
+static void ata_scsi_handle_link_detach(struct ata_link *link)
+{
+	struct ata_port *ap = link->ap;
+	struct ata_device *dev;
+
+	ata_link_for_each_dev(dev, link) {
+		unsigned long flags;
+
+		if (!(dev->flags & ATA_DFLAG_DETACHED))
+			continue;
+
+		spin_lock_irqsave(ap->lock, flags);
+		dev->flags &= ~ATA_DFLAG_DETACHED;
+		spin_unlock_irqrestore(ap->lock, flags);
+
+		ata_scsi_remove_dev(dev);
+	}
+}
+
 /**
  *	ata_scsi_hotplug - SCSI part of hotplug
  *	@work: Pointer to ATA port to perform SCSI hotplug on
@@ -3108,7 +3155,7 @@ void ata_scsi_hotplug(struct work_struct *work)
 {
 	struct ata_port *ap =
 		container_of(work, struct ata_port, hotplug_task.work);
-	struct ata_device *dev;
+	int i;
 
 	if (ap->pflags & ATA_PFLAG_UNLOADING) {
 		DPRINTK("ENTER/EXIT - unloading\n");
@@ -3117,19 +3164,14 @@ void ata_scsi_hotplug(struct work_struct *work)
 
 	DPRINTK("ENTER\n");
 
-	/* unplug detached devices */
-	ata_link_for_each_dev(dev, &ap->link) {
-		unsigned long flags;
-
-		if (!(dev->flags & ATA_DFLAG_DETACHED))
-			continue;
-
-		spin_lock_irqsave(ap->lock, flags);
-		dev->flags &= ~ATA_DFLAG_DETACHED;
-		spin_unlock_irqrestore(ap->lock, flags);
-
-		ata_scsi_remove_dev(dev);
-	}
+	/* Unplug detached devices.  We cannot use link iterator here
+	 * because PMP links have to be scanned even if PMP is
+	 * currently not attached.  Iterate manually.
+	 */
+	ata_scsi_handle_link_detach(&ap->link);
+	if (ap->pmp_link)
+		for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
+			ata_scsi_handle_link_detach(&ap->pmp_link[i]);
 
 	/* scan for new ones */
 	ata_scsi_scan_host(ap, 0);
@@ -3157,26 +3199,40 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 			      unsigned int id, unsigned int lun)
 {
 	struct ata_port *ap = ata_shost_to_port(shost);
-	struct ata_eh_info *ehi = &ap->link.eh_info;
 	unsigned long flags;
-	int rc = 0;
+	int devno, rc = 0;
 
 	if (!ap->ops->error_handler)
 		return -EOPNOTSUPP;
 
-	if ((channel != SCAN_WILD_CARD && channel != 0) ||
-	    (lun != SCAN_WILD_CARD && lun != 0))
+	if (lun != SCAN_WILD_CARD && lun)
 		return -EINVAL;
 
+	if (ap->nr_pmp_links == 0) {
+		if (channel != SCAN_WILD_CARD && channel)
+			return -EINVAL;
+		devno = id;
+	} else {
+		if (id != SCAN_WILD_CARD && id)
+			return -EINVAL;
+		devno = channel;
+	}
+
 	spin_lock_irqsave(ap->lock, flags);
 
-	if (id == SCAN_WILD_CARD) {
-		ehi->probe_mask |= (1 << ata_link_max_devices(&ap->link)) - 1;
-		ehi->action |= ATA_EH_SOFTRESET;
+	if (devno == SCAN_WILD_CARD) {
+		struct ata_link *link;
+
+		ata_port_for_each_link(link, ap) {
+			struct ata_eh_info *ehi = &link->eh_info;
+			ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
+			ehi->action |= ATA_EH_SOFTRESET;
+		}
 	} else {
-		struct ata_device *dev = ata_find_dev(ap, id);
+		struct ata_device *dev = ata_find_dev(ap, devno);
 
 		if (dev) {
+			struct ata_eh_info *ehi = &dev->link->eh_info;
 			ehi->probe_mask |= 1 << dev->devno;
 			ehi->action |= ATA_EH_SOFTRESET;
 			ehi->flags |= ATA_EHI_RESUME_LINK;
@@ -3210,23 +3266,26 @@ void ata_scsi_dev_rescan(struct work_struct *work)
 {
 	struct ata_port *ap =
 		container_of(work, struct ata_port, scsi_rescan_task);
+	struct ata_link *link;
 	struct ata_device *dev;
 	unsigned long flags;
 
 	spin_lock_irqsave(ap->lock, flags);
 
-	ata_link_for_each_dev(dev, &ap->link) {
-		struct scsi_device *sdev = dev->sdev;
+	ata_port_for_each_link(link, ap) {
+		ata_link_for_each_dev(dev, link) {
+			struct scsi_device *sdev = dev->sdev;
 
-		if (!ata_dev_enabled(dev) || !sdev)
-			continue;
-		if (scsi_device_get(sdev))
-			continue;
+			if (!ata_dev_enabled(dev) || !sdev)
+				continue;
+			if (scsi_device_get(sdev))
+				continue;
 
-		spin_unlock_irqrestore(ap->lock, flags);
-		scsi_rescan_device(&(sdev->sdev_gendev));
-		scsi_device_put(sdev);
-		spin_lock_irqsave(ap->lock, flags);
+			spin_unlock_irqrestore(ap->lock, flags);
+			scsi_rescan_device(&(sdev->sdev_gendev));
+			scsi_device_put(sdev);
+			spin_lock_irqsave(ap->lock, flags);
+		}
 	}
 
 	spin_unlock_irqrestore(ap->lock, flags);
-- 
cgit v1.2.3-70-g09d2


From e3667ebf857ba744b5211c90d46f6a17dd9a2479 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 6 Aug 2007 18:36:24 +0900
Subject: libata-link: update Power Management to handle PMP links

Update Power Management to consider PMP links.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 14f299278f1..8a79b976f08 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5912,6 +5912,7 @@ static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
 
 	for (i = 0; i < host->n_ports; i++) {
 		struct ata_port *ap = host->ports[i];
+		struct ata_link *link;
 
 		/* Previous resume operation might still be in
 		 * progress.  Wait for PM_PENDING to clear.
@@ -5931,8 +5932,10 @@ static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
 		}
 
 		ap->pflags |= ATA_PFLAG_PM_PENDING;
-		ap->link.eh_info.action |= action;
-		ap->link.eh_info.flags |= ehi_flags;
+		__ata_port_for_each_link(link, ap) {
+			link->eh_info.action |= action;
+			link->eh_info.flags |= ehi_flags;
+		}
 
 		ata_port_schedule_eh(ap);
 
-- 
cgit v1.2.3-70-g09d2


From 0bc2a79a2002e3cc1b514c100b6c576983da6a90 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Tue, 31 Jul 2007 14:01:48 +0100
Subject: libata: Correct IORDY handling

Debugging a report of a problem with an ancient solid state disk showed
up some problems in the IORDY handling

1.	We check the wrong bit to see if the device has IORDY
2.	Even then some ancient creaking piles of crap don't support
	SETXFER at all.

The cases it fixes are obscure and the risk of side effects is slight
but possible. This also moves us slightly closer to supporting original
MFM/RLL disks with libata.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 6 +++++-
 include/linux/ata.h       | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 8a79b976f08..02425e401a6 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2759,7 +2759,11 @@ static int ata_dev_set_mode(struct ata_device *dev)
 	/* Old CFA may refuse this command, which is just fine */
 	if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
         	err_mask &= ~AC_ERR_DEV;
-
+	/* Some very old devices and some bad newer ones fail any kind of
+	   SET_XFERMODE request but support PIO0-2 timings and no IORDY */
+	if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) &&
+			dev->pio_mode <= XFER_PIO_2)
+		err_mask &= ~AC_ERR_DEV;
 	if (err_mask) {
 		ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
 			       "(err_mask=0x%x)\n", err_mask);
diff --git a/include/linux/ata.h b/include/linux/ata.h
index c043c1ccf1c..40c7af05fdb 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -358,7 +358,7 @@ struct ata_taskfile {
 #define ata_id_removeable(id)	((id)[0] & (1 << 7))
 #define ata_id_has_dword_io(id)	((id)[50] & (1 << 0))
 #define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
-#define ata_id_has_iordy(id) ((id)[49] & (1 << 9))
+#define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
 #define ata_id_u32(id,n)	\
 	(((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 #define ata_id_u64(id,n)	\
-- 
cgit v1.2.3-70-g09d2


From 4cc980b34b2a25f600576dcd11de388bc44e1ebd Mon Sep 17 00:00:00 2001
From: Albert Lee <albertcc@tw.ibm.com>
Date: Wed, 15 Aug 2007 03:19:45 -0400
Subject: libata: move ata_altstatus() to pio data xfer functions

Move ata_altstatus() out from ata_hsm_move() to the pio data xfer
functions like ata_pio_sectors() and atapi_pio_bytes() where it makes
more sense.

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 02425e401a6..fc067937063 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4614,6 +4614,8 @@ static void ata_pio_sectors(struct ata_queued_cmd *qc)
 			ata_pio_sector(qc);
 	} else
 		ata_pio_sector(qc);
+
+	ata_altstatus(qc->ap); /* flush */
 }
 
 /**
@@ -4788,6 +4790,7 @@ static void atapi_pio_bytes(struct ata_queued_cmd *qc)
 	VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes);
 
 	__atapi_pio_bytes(qc, bytes);
+	ata_altstatus(ap); /* flush */
 
 	return;
 
@@ -4959,7 +4962,6 @@ fsm_start:
 			 */
 			ap->hsm_task_state = HSM_ST;
 			ata_pio_sectors(qc);
-			ata_altstatus(ap); /* flush */
 		} else
 			/* send CDB */
 			atapi_send_cdb(ap, qc);
@@ -5040,7 +5042,6 @@ fsm_start:
 
 				if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
 					ata_pio_sectors(qc);
-					ata_altstatus(ap);
 					status = ata_wait_idle(ap);
 				}
 
@@ -5060,13 +5061,11 @@ fsm_start:
 			if (ap->hsm_task_state == HSM_ST_LAST &&
 			    (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
 				/* all data read */
-				ata_altstatus(ap);
 				status = ata_wait_idle(ap);
 				goto fsm_start;
 			}
 		}
 
-		ata_altstatus(ap); /* flush */
 		poll_next = 1;
 		break;
 
-- 
cgit v1.2.3-70-g09d2


From baf4fdfaaf5cb9f4fb1c341c8cef60a64e580582 Mon Sep 17 00:00:00 2001
From: Mark Lord <liml@rtr.ca>
Date: Wed, 8 Aug 2007 01:08:45 +0900
Subject: libata: add support for ATA_16 on ATAPI

Add support for issuing ATA_16 passthru commands to ATAPI devices
managed by libata.  It requires the previous CDB length fix patch.

A boot/module parameter, "atapi_passthru16=0" can be used to globally
disable this feature, if ever desired.

tj: restructured __ata_scsi_queuecmd() according to Jeff's suggestion.

Signed-off-by: Mark Lord <liml@rtr.ca>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c |  4 ++++
 drivers/ata/libata-scsi.c | 52 ++++++++++++++++++++++++++++++++---------------
 drivers/ata/libata.h      |  1 +
 3 files changed, 41 insertions(+), 16 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index fc067937063..75ccf46972d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -86,6 +86,10 @@ int atapi_dmadir = 0;
 module_param(atapi_dmadir, int, 0444);
 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
 
+int atapi_passthru16 = 1;
+module_param(atapi_passthru16, int, 0444);
+MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
+
 int libata_fua = 0;
 module_param_named(fua, libata_fua, int, 0444);
 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 58051ee40f1..7d66c986a54 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2761,28 +2761,48 @@ static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
 				      void (*done)(struct scsi_cmnd *),
 				      struct ata_device *dev)
 {
+	u8 scsi_op = scmd->cmnd[0];
+	ata_xlat_func_t xlat_func;
 	int rc = 0;
 
-	if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len)) {
-		DPRINTK("bad CDB len=%u, max=%u\n",
-			scmd->cmd_len, dev->cdb_len);
-		scmd->result = DID_ERROR << 16;
-		done(scmd);
-		return 0;
-	}
-
 	if (dev->class == ATA_DEV_ATA) {
-		ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
-							      scmd->cmnd[0]);
+		if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
+			goto bad_cdb_len;
 
-		if (xlat_func)
-			rc = ata_scsi_translate(dev, scmd, done, xlat_func);
-		else
-			ata_scsi_simulate(dev, scmd, done);
-	} else
-		rc = ata_scsi_translate(dev, scmd, done, atapi_xlat);
+		xlat_func = ata_get_xlat_func(dev, scsi_op);
+	} else {
+		if (unlikely(!scmd->cmd_len))
+			goto bad_cdb_len;
+
+		xlat_func = NULL;
+		if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
+			/* relay SCSI command to ATAPI device */
+			if (unlikely(scmd->cmd_len > dev->cdb_len))
+				goto bad_cdb_len;
+
+			xlat_func = atapi_xlat;
+		} else {
+			/* ATA_16 passthru, treat as an ATA command */
+			if (unlikely(scmd->cmd_len > 16))
+				goto bad_cdb_len;
+
+			xlat_func = ata_get_xlat_func(dev, scsi_op);
+		}
+	}
+
+	if (xlat_func)
+		rc = ata_scsi_translate(dev, scmd, done, xlat_func);
+	else
+		ata_scsi_simulate(dev, scmd, done);
 
 	return rc;
+
+ bad_cdb_len:
+	DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
+		scmd->cmd_len, scsi_op, dev->cdb_len);
+	scmd->result = DID_ERROR << 16;
+	done(scmd);
+	return 0;
 }
 
 /**
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 6d85edefa7c..11f64a43b38 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -56,6 +56,7 @@ extern unsigned int ata_print_id;
 extern struct workqueue_struct *ata_aux_wq;
 extern int atapi_enabled;
 extern int atapi_dmadir;
+extern int atapi_passthru16;
 extern int libata_fua;
 extern int libata_noacpi;
 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
-- 
cgit v1.2.3-70-g09d2


From 50a99018787aa1aed812e09ad5b27647475656a0 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 8 Aug 2007 14:27:00 +0100
Subject: libata-core: Document some limits/assumptions about ID_ATA

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 75ccf46972d..d2141a04fff 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1618,6 +1618,9 @@ static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
  *	devices.  This function also issues ATA_CMD_INIT_DEV_PARAMS
  *	for pre-ATA4 drives.
  *
+ *	FIXME: ATA_CMD_ID_ATA is optional for early drives and right
+ *	now we abort if we hit that case. 
+ *
  *	LOCKING:
  *	Kernel thread context (may sleep)
  *
@@ -1745,10 +1748,13 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 		/*
 		 * The exact sequence expected by certain pre-ATA4 drives is:
 		 * SRST RESET
-		 * IDENTIFY
-		 * INITIALIZE DEVICE PARAMETERS
+		 * IDENTIFY (optional in early ATA)
+		 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
 		 * anything else..
 		 * Some drives were very specific about that exact sequence.
+		 *
+		 * Note that ATA4 says lba is mandatory so the second check
+		 * shoud never trigger.
 		 */
 		if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
 			err_mask = ata_dev_init_params(dev, id[3], id[6]);
-- 
cgit v1.2.3-70-g09d2


From 4f34337b1f6f7c1e0f2e3c938eb9eadd340593fe Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 8 Aug 2007 14:30:31 +0100
Subject: libata: Note that our cache flush code needs fixing up

Remembered this while doing auditing and code review versus the specs

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d2141a04fff..c0f3c78a2be 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5906,6 +5906,10 @@ int ata_flush_cache(struct ata_device *dev)
 	else
 		cmd = ATA_CMD_FLUSH;
 
+	/* This is wrong. On a failed flush we get back the LBA of the lost
+	   sector and we should (assuming it wasn't aborted as unknown) issue
+	   a further flush command to continue the writeback until it 
+	   does not error */
 	err_mask = ata_do_simple_cmd(dev, cmd);
 	if (err_mask) {
 		ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
-- 
cgit v1.2.3-70-g09d2


From 05d1efffdc9bf84311bb1a3c2e3db55b544ca119 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Fri, 10 Aug 2007 13:59:49 -0700
Subject: pata_cmd64x: Set up MWDMA modes properly

Set the MWDMA timing by updating the correct registers.  Split the PIO path as
this is mostly shared code.  Wants testing.

Signed-off-by: Alan Cox <alan@redhat.com>
Tested-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_cmd64x.c | 37 ++++++++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 11 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index e34b632487d..922902a1b4a 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -31,7 +31,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_cmd64x"
-#define DRV_VERSION "0.2.4"
+#define DRV_VERSION "0.2.5"
 
 /*
  * CMD64x specific registers definition.
@@ -88,14 +88,15 @@ static int cmd648_cable_detect(struct ata_port *ap)
 }
 
 /**
- *	cmd64x_set_piomode	-	set initial PIO mode data
+ *	cmd64x_set_piomode	-	set PIO and MWDMA timing
  *	@ap: ATA interface
  *	@adev: ATA device
+ *	@mode: mode
  *
- *	Called to do the PIO mode setup.
+ *	Called to do the PIO and MWDMA mode setup.
  */
 
-static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
+static void cmd64x_set_timing(struct ata_port *ap, struct ata_device *adev, u8 mode)
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	struct ata_timing t;
@@ -117,8 +118,9 @@ static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
 	int arttim = arttim_port[ap->port_no][adev->devno];
 	int drwtim = drwtim_port[ap->port_no][adev->devno];
 
-
-	if (ata_timing_compute(adev, adev->pio_mode, &t, T, 0) < 0) {
+	/* ata_timing_compute is smart and will produce timings for MWDMA
+	   that don't violate the drives PIO capabilities. */
+	if (ata_timing_compute(adev, mode, &t, T, 0) < 0) {
 		printk(KERN_ERR DRV_NAME ": mode computation failed.\n");
 		return;
 	}
@@ -167,6 +169,20 @@ static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
 	pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover);
 }
 
+/**
+ *	cmd64x_set_piomode	-	set initial PIO mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Used when configuring the devices ot set the PIO timings. All the
+ *	actual work is done by the PIO/MWDMA setting helper
+ */
+
+static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	cmd64x_set_timing(ap, adev, adev->pio_mode);
+}
+
 /**
  *	cmd64x_set_dmamode	-	set initial DMA mode data
  *	@ap: ATA interface
@@ -180,9 +196,6 @@ static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 	static const u8 udma_data[] = {
 		0x30, 0x20, 0x10, 0x20, 0x10, 0x00
 	};
-	static const u8 mwdma_data[] = {
-		0x30, 0x20, 0x10
-	};
 
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	u8 regU, regD;
@@ -208,8 +221,10 @@ static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 		regU |= 1 << adev->devno; /* UDMA on */
 		if (adev->dma_mode > 2)	/* 15nS timing */
 			regU |= 4 << adev->devno;
-	} else
-		regD |= mwdma_data[adev->dma_mode - XFER_MW_DMA_0] << shift;
+	} else {
+		regU &= ~ (1 << adev->devno);	/* UDMA off */
+		cmd64x_set_timing(ap, adev, adev->dma_mode);
+	}
 
 	regD |= 0x20 << adev->devno;
 
-- 
cgit v1.2.3-70-g09d2


From 9f45cbd3f0fc597530aaf85cad7fe52cd63f1fd8 Mon Sep 17 00:00:00 2001
From: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Date: Wed, 15 Aug 2007 03:57:11 -0400
Subject: [libata] check for SATA async notify support

Check to see if an ATAPI device supports Asynchronous Notification.
If so, enable it, if the host controller supports AN.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/ata.h       |  9 ++++++++
 include/linux/libata.h    |  2 ++
 3 files changed, 64 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c0f3c78a2be..9f87f7ddd48 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -70,6 +70,7 @@ const unsigned long sata_deb_timing_long[]		= { 100, 2000, 5000 };
 static unsigned int ata_dev_init_params(struct ata_device *dev,
 					u16 heads, u16 sectors);
 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
+static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable);
 static void ata_dev_xfermask(struct ata_device *dev);
 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
 
@@ -1987,6 +1988,22 @@ int ata_dev_configure(struct ata_device *dev)
 		}
 		dev->cdb_len = (unsigned int) rc;
 
+		/*
+		 * check to see if this ATAPI device supports
+		 * Asynchronous Notification
+		 */
+		if ((ap->flags & ATA_FLAG_AN) && ata_id_has_AN(id)) {
+			int err;
+			/* issue SET feature command to turn this on */
+			err = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE);
+			if (err)
+				ata_dev_printk(dev, KERN_ERR,
+						"unable to set AN, err %x\n",
+						err);
+			else
+				dev->flags |= ATA_DFLAG_AN;
+		}
+
 		if (ata_id_cdb_intr(dev->id)) {
 			dev->flags |= ATA_DFLAG_CDB_INTR;
 			cdb_intr_string = ", CDB intr";
@@ -3974,6 +3991,42 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
 	return err_mask;
 }
 
+/**
+ *	ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES
+ *	@dev: Device to which command will be sent
+ *	@enable: Whether to enable or disable the feature
+ *
+ *	Issue SET FEATURES - SATA FEATURES command to device @dev
+ *	on port @ap with sector count set to indicate Asynchronous
+ *	Notification feature
+ *
+ *	LOCKING:
+ *	PCI/etc. bus probe sem.
+ *
+ *	RETURNS:
+ *	0 on success, AC_ERR_* mask otherwise.
+ */
+static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable)
+{
+	struct ata_taskfile tf;
+	unsigned int err_mask;
+
+	/* set up set-features taskfile */
+	DPRINTK("set features - SATA features\n");
+
+	ata_tf_init(dev, &tf);
+	tf.command = ATA_CMD_SET_FEATURES;
+	tf.feature = enable;
+	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+	tf.protocol = ATA_PROT_NODATA;
+	tf.nsect = SATA_AN;
+
+	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+
+	DPRINTK("EXIT, err_mask=%x\n", err_mask);
+	return err_mask;
+}
+
 /**
  *	ata_dev_init_params - Issue INIT DEV PARAMS command
  *	@dev: Device to which command will be sent
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 40c7af05fdb..fba8e145983 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -230,6 +230,12 @@ enum {
 
 	SETFEATURES_SPINUP	= 0x07, /* Spin-up drive */
 
+	SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
+	SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
+
+	/* SETFEATURE Sector counts for SATA features */
+	SATA_AN			= 0x05,  /* Asynchronous Notification */
+
 	/* ATAPI stuff */
 	ATAPI_PKT_DMA		= (1 << 0),
 	ATAPI_DMADIR		= (1 << 2),	/* ATAPI data dir:
@@ -357,6 +363,9 @@ struct ata_taskfile {
 #define ata_id_queue_depth(id)	(((id)[75] & 0x1f) + 1)
 #define ata_id_removeable(id)	((id)[0] & (1 << 7))
 #define ata_id_has_dword_io(id)	((id)[50] & (1 << 0))
+#define ata_id_has_AN(id)	\
+	( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
+	  ((id)[78] & (1 << 5)) )
 #define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
 #define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
 #define ata_id_u32(id,n)	\
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 7a1793bd237..6dd5b437210 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -139,6 +139,7 @@ enum {
 	ATA_DFLAG_FLUSH_EXT	= (1 << 4), /* do FLUSH_EXT instead of FLUSH */
 	ATA_DFLAG_ACPI_PENDING	= (1 << 5), /* ACPI resume action pending */
 	ATA_DFLAG_ACPI_FAILED	= (1 << 6), /* ACPI on devcfg has failed */
+	ATA_DFLAG_AN		= (1 << 7), /* device supports AN */
 	ATA_DFLAG_CFG_MASK	= (1 << 8) - 1,
 
 	ATA_DFLAG_PIO		= (1 << 8), /* device limited to PIO mode */
@@ -179,6 +180,7 @@ enum {
 	ATA_FLAG_IGN_SIMPLEX	= (1 << 15), /* ignore SIMPLEX */
 	ATA_FLAG_NO_IORDY	= (1 << 16), /* controller lacks iordy */
 	ATA_FLAG_ACPI_SATA	= (1 << 17), /* need native SATA ACPI layout */
+	ATA_FLAG_AN		= (1 << 18), /* controller supports AN */
 
 	/* The following flag belongs to ap->pflags but is kept in
 	 * ap->flags because it's referenced in many LLDs and will be
-- 
cgit v1.2.3-70-g09d2


From 2f2949680ad89d606db838340b17c30216c0bb0f Mon Sep 17 00:00:00 2001
From: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Date: Wed, 15 Aug 2007 04:11:25 -0400
Subject: [libata] ahci: send event when AN received

When we get an SDB FIS with the 'N' bit set, we should send
an event to user space to indicate that there has been a
media change.  This will be done via the scsi device.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c        | 24 ++++++++++++++++++++++++
 drivers/ata/libata-scsi.c | 18 ++++++++++++++++++
 include/linux/libata.h    |  1 +
 3 files changed, 43 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 483733783cf..d52b73ab795 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1368,6 +1368,30 @@ static void ahci_port_intr(struct ata_port *ap)
 		return;
 	}
 
+	if (status & PORT_IRQ_SDB_FIS) {
+		/*
+		 * if this is an ATAPI device with AN turned on,
+		 * then we should interrogate the device to
+		 * determine the cause of the interrupt
+		 *
+		 * for AN - this we should check the SDB FIS
+		 * and find the I and N bits set
+		 */
+		const __le32 *f = pp->rx_fis + RX_FIS_SDB;
+		u32 f0 = le32_to_cpu(f[0]);
+
+		/* check the 'N' bit in word 0 of the FIS */
+		if (f0 & (1 << 15)) {
+			int port_addr = ((f0 & 0x00000f00) >> 8);
+			struct ata_device *adev;
+			if (port_addr < ATA_MAX_DEVICES) {
+				adev = &ap->link.device[port_addr];
+				if (adev->flags & ATA_DFLAG_AN)
+					ata_scsi_media_change_notify(adev);
+			}
+		}
+	}
+
 	if (ap->link.sactive)
 		qc_active = readl(port_mmio + PORT_SCR_ACT);
 	else
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 7d66c986a54..f0f586b56c2 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3159,6 +3159,24 @@ static void ata_scsi_handle_link_detach(struct ata_link *link)
 	}
 }
 
+/**
+ *	ata_scsi_media_change_notify - send media change event
+ *	@atadev: Pointer to the disk device with media change event
+ *
+ *	Tell the block layer to send a media change notification
+ *	event.
+ *
+ * 	LOCKING:
+ * 	interrupt context, may not sleep.
+ */
+void ata_scsi_media_change_notify(struct ata_device *atadev)
+{
+#ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
+	scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE);
+#endif
+}
+EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
+
 /**
  *	ata_scsi_hotplug - SCSI part of hotplug
  *	@work: Pointer to ATA port to perform SCSI hotplug on
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 6dd5b437210..d98e8b50e20 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -755,6 +755,7 @@ extern void ata_host_init(struct ata_host *, struct device *,
 extern int ata_scsi_detect(struct scsi_host_template *sht);
 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
+extern void ata_scsi_media_change_notify(struct ata_device *atadev);
 extern void ata_sas_port_destroy(struct ata_port *);
 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
 					   struct ata_port_info *, struct Scsi_Host *);
-- 
cgit v1.2.3-70-g09d2


From a738492501eaf6e266acc53a064552b3fcc706b2 Mon Sep 17 00:00:00 2001
From: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Date: Thu, 9 Aug 2007 14:23:41 -0700
Subject: ahci: Store interrupt value

Use a stored value for which interrupts to enable.  Changing this allows
us to selectively turn off certain interrupts later and have them
stay off.

Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index d52b73ab795..baf7d056219 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -175,6 +175,7 @@ enum {
 	AHCI_FLAG_32BIT_ONLY		= (1 << 28), /* force 32bit */
 	AHCI_FLAG_MV_PATA		= (1 << 29), /* PATA port */
 	AHCI_FLAG_NO_MSI		= (1 << 30), /* no PCI MSI */
+	AHCI_FLAG_NO_HOTPLUG		= (1 << 31), /* ignore PxSERR.DIAG.N */
 
 	AHCI_FLAG_COMMON		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 					  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
@@ -215,6 +216,7 @@ struct ahci_port_priv {
 	unsigned int		ncq_saw_d2h:1;
 	unsigned int		ncq_saw_dmas:1;
 	unsigned int		ncq_saw_sdb:1;
+	u32 			intr_mask;	/* interrupts to enable */
 };
 
 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
@@ -1552,6 +1554,7 @@ static void ahci_thaw(struct ata_port *ap)
 	void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
 	void __iomem *port_mmio = ahci_port_base(ap);
 	u32 tmp;
+	struct ahci_port_priv *pp = ap->private_data;
 
 	/* clear IRQ */
 	tmp = readl(port_mmio + PORT_IRQ_STAT);
@@ -1559,7 +1562,7 @@ static void ahci_thaw(struct ata_port *ap)
 	writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
 
 	/* turn IRQ back on */
-	writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
+	writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
 }
 
 static void ahci_error_handler(struct ata_port *ap)
@@ -1713,6 +1716,12 @@ static int ahci_port_start(struct ata_port *ap)
 	pp->cmd_tbl = mem;
 	pp->cmd_tbl_dma = mem_dma;
 
+	/*
+ 	 * Save off initial list of interrupts to be enabled.
+ 	 * This could be changed later
+ 	 */
+	pp->intr_mask = DEF_PORT_IRQ;
+
 	ap->private_data = pp;
 
 	/* engage engines, captain */
-- 
cgit v1.2.3-70-g09d2


From 2eb829e934abb10db36ddaacd82603c3cdd98b6d Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@web.de>
Date: Fri, 10 Aug 2007 13:59:51 -0700
Subject: ata_piix: disallow UDMA 133 on ICH5 & ICH7

There is another outstanding issue with ata_piix.c.  Intel has never
officially supported anything faster than PATA 100MB/s.

But, the ata_piix.c driver "define" the ICH5 & ICH7 as UDMA6 (aka 133MB/s)
capable.  [ Well, no one has probably noticed it before, because there is bug
in do_pata_set_dmamode...  Just look at
libata_atapiix_enable_real_udma133.patch and you'll see what wrong with it.  ]

Here are Intel's datasheets for the affected chipsets: ICH5 Datasheet:
http://www.intel.com/design/chipsets/datashts/252516.htm (See note on page
183: "...  the ICH5 supports reads at the maximum rate of 100MB/s.")

ICH7 Datasheet: http://www.intel.com/design/chipsets/datashts/307013.htm (See
first note on page 190: "...  the ICH7 supports reads at the maximum rate of
100MB/s.")

They are two different ways to deal with it:

- Either -

1. replace all ich_pata_133 with ich_pata_100.
   (libata_atapiix_disable_udma6.diff - diff from 2.6.22 )

- Or -

2. keep all ich_pata_133 and fix the bug in "do_pata_set_dmamode".
   (libata_atapiix_enable_real_udma133.patch - diff from 2.6.22) If there are
   any concerns about the safety of the patch patch:
   http://lkml.org/lkml/2007/7/6/292 (It was already tested by an Intel
   employee, but I guess a bit more user input is necessary here...  )

This patch implements 1.

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 03fe493026e..4b66b9e9638 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -123,7 +123,7 @@ enum {
 	ich_pata_33		= 1,	/* ICH up to UDMA 33 only */
 	ich_pata_66		= 2,	/* ICH up to 66 Mhz */
 	ich_pata_100		= 3,	/* ICH up to UDMA 100 */
-	ich_pata_133		= 4,	/* ICH up to UDMA 133 */
+	/* ICH up to UDMA 133 is not supported */
 	ich5_sata		= 5,
 	ich6_sata		= 6,
 	ich6_sata_ahci		= 7,
@@ -199,7 +199,7 @@ static const struct pci_device_id piix_pci_tbl[] = {
 	{ 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	{ 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	/* Intel ICH5 */
-	{ 0x8086, 0x24DB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_133 },
+	{ 0x8086, 0x24DB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	/* C-ICH (i810E2) */
 	{ 0x8086, 0x245B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	/* ESB (855GME/875P + 6300ESB) UDMA 100  */
@@ -207,7 +207,7 @@ static const struct pci_device_id piix_pci_tbl[] = {
 	/* ICH6 (and 6) (i915) UDMA 100 */
 	{ 0x8086, 0x266F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	/* ICH7/7-R (i945, i975) UDMA 100*/
-	{ 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_133 },
+	{ 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	{ 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
 	/* ICH8 Mobile PATA Controller */
 	{ 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
@@ -505,7 +505,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &ich_pata_ops,
 	},
 
-	/* ich_pata_133: 4 	ICH with full UDMA6 */
+	/* ich_pata_133: 4 - Not supported - */
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
-- 
cgit v1.2.3-70-g09d2


From b8773531cc54c1ed10c8ec301353ee6b53b601a5 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Fri, 10 Aug 2007 13:59:33 -0700
Subject: libata-add-irq_flags-to-struct-pata_platform_info-fix

Remove unneeded, undesirable cast of void*.

Cc: Jeff Garzik <jeff@garzik.org>
Cc: Sonic Zhang <sonic.adi@gmail.com>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_platform.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index 37e5158391d..9dc628931e9 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -207,7 +207,7 @@ static int __devinit pata_platform_probe(struct platform_device *pdev)
 
 	ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
 
-	pp_info = (struct pata_platform_info *)(pdev->dev.platform_data);
+	pp_info = pdev->dev.platform_data;
 	pata_platform_setup_port(&ap->ioaddr, pp_info);
 
 	/* activate */
-- 
cgit v1.2.3-70-g09d2


From 6d32d30f55020d766388df7515f771f68c973033 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Wed, 15 Aug 2007 05:38:46 -0400
Subject: [libata] Remove ->irq_ack() hook, and ata_dummy_irq_on()

* ->irq_ack() is redundant to what the irq handler already
  performs... chk-status + irq-clear.  Furthermore, it is only
  called in one place, when screaming-irq-debugging is enabled,
  so we don't want to bother with a hook just for that.

* ata_dummy_irq_on() is only ever used in drivers that have
  no callpath reaching ->irq_on().  Remove .irq_on hook from
  those drivers, and the now-unused ata_dummy_irq_on()

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c              |  4 ----
 drivers/ata/ata_generic.c       |  1 -
 drivers/ata/ata_piix.c          |  3 ---
 drivers/ata/libata-core.c       |  6 ++----
 drivers/ata/libata-sff.c        | 40 ----------------------------------------
 drivers/ata/pata_ali.c          |  4 ----
 drivers/ata/pata_amd.c          |  6 ------
 drivers/ata/pata_artop.c        |  2 --
 drivers/ata/pata_atiixp.c       |  1 -
 drivers/ata/pata_cmd640.c       |  1 -
 drivers/ata/pata_cmd64x.c       |  3 ---
 drivers/ata/pata_cs5520.c       |  1 -
 drivers/ata/pata_cs5530.c       |  1 -
 drivers/ata/pata_cs5535.c       |  1 -
 drivers/ata/pata_cypress.c      |  1 -
 drivers/ata/pata_efar.c         |  1 -
 drivers/ata/pata_hpt366.c       |  1 -
 drivers/ata/pata_hpt37x.c       |  4 ----
 drivers/ata/pata_hpt3x2n.c      |  1 -
 drivers/ata/pata_hpt3x3.c       |  1 -
 drivers/ata/pata_icside.c       | 18 ------------------
 drivers/ata/pata_isapnp.c       |  1 -
 drivers/ata/pata_it8213.c       |  1 -
 drivers/ata/pata_it821x.c       |  2 --
 drivers/ata/pata_ixp4xx_cf.c    |  1 -
 drivers/ata/pata_jmicron.c      |  1 -
 drivers/ata/pata_legacy.c       |  7 -------
 drivers/ata/pata_marvell.c      |  1 -
 drivers/ata/pata_mpc52xx.c      |  1 -
 drivers/ata/pata_mpiix.c        |  1 -
 drivers/ata/pata_netcell.c      |  1 -
 drivers/ata/pata_ns87410.c      |  1 -
 drivers/ata/pata_oldpiix.c      |  1 -
 drivers/ata/pata_opti.c         |  1 -
 drivers/ata/pata_optidma.c      |  2 --
 drivers/ata/pata_pcmcia.c       |  1 -
 drivers/ata/pata_pdc2027x.c     |  2 --
 drivers/ata/pata_pdc202xx_old.c |  2 --
 drivers/ata/pata_platform.c     |  1 -
 drivers/ata/pata_qdi.c          |  2 --
 drivers/ata/pata_radisys.c      |  1 -
 drivers/ata/pata_rz1000.c       |  1 -
 drivers/ata/pata_sc1200.c       |  1 -
 drivers/ata/pata_scc.c          | 33 ---------------------------------
 drivers/ata/pata_serverworks.c  |  2 --
 drivers/ata/pata_sil680.c       |  1 -
 drivers/ata/pata_sis.c          |  6 ------
 drivers/ata/pata_sl82c105.c     |  1 -
 drivers/ata/pata_triflex.c      |  1 -
 drivers/ata/pata_via.c          |  2 --
 drivers/ata/pata_winbond.c      |  1 -
 drivers/ata/pdc_adma.c          |  1 -
 drivers/ata/sata_inic162x.c     |  1 -
 drivers/ata/sata_mv.c           |  3 ---
 drivers/ata/sata_nv.c           |  4 ----
 drivers/ata/sata_promise.c      |  3 ---
 drivers/ata/sata_qstor.c        |  1 -
 drivers/ata/sata_sil.c          |  1 -
 drivers/ata/sata_sil24.c        |  2 --
 drivers/ata/sata_sis.c          |  1 -
 drivers/ata/sata_svw.c          |  1 -
 drivers/ata/sata_sx4.c          |  1 -
 drivers/ata/sata_uli.c          |  1 -
 drivers/ata/sata_via.c          |  3 ---
 drivers/ata/sata_vsc.c          |  1 -
 include/linux/libata.h          |  4 ----
 66 files changed, 2 insertions(+), 207 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index baf7d056219..c888c966a02 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -276,8 +276,6 @@ static const struct ata_port_operations ahci_ops = {
 	.qc_issue		= ahci_qc_issue,
 
 	.irq_clear		= ahci_irq_clear,
-	.irq_on			= ata_dummy_irq_on,
-	.irq_ack		= ata_dummy_irq_ack,
 
 	.scr_read		= ahci_scr_read,
 	.scr_write		= ahci_scr_write,
@@ -310,8 +308,6 @@ static const struct ata_port_operations ahci_vt8251_ops = {
 	.qc_issue		= ahci_qc_issue,
 
 	.irq_clear		= ahci_irq_clear,
-	.irq_on			= ata_dummy_irq_on,
-	.irq_ack		= ata_dummy_irq_ack,
 
 	.scr_read		= ahci_scr_read,
 	.scr_write		= ahci_scr_write,
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index e390ad47c8e..6ec1bbc4fcc 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -121,7 +121,6 @@ static struct ata_port_operations generic_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 4b66b9e9638..68bc0ae671c 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -318,7 +318,6 @@ static const struct ata_port_operations piix_pata_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -352,7 +351,6 @@ static const struct ata_port_operations ich_pata_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -382,7 +380,6 @@ static const struct ata_port_operations piix_sata_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 9f87f7ddd48..4f8b8d210cf 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5747,7 +5747,8 @@ idle_irq:
 
 #ifdef ATA_IRQ_TRAP
 	if ((ap->stats.idle_irq % 1000) == 0) {
-		ap->ops->irq_ack(ap, 0); /* debug trap */
+		ata_chk_status(ap);
+		ap->ops->irq_clear(ap);
 		ata_port_printk(ap, KERN_WARNING, "irq trap\n");
 		return 1;
 	}
@@ -7137,9 +7138,6 @@ EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
 EXPORT_SYMBOL_GPL(ata_do_eh);
 EXPORT_SYMBOL_GPL(ata_irq_on);
-EXPORT_SYMBOL_GPL(ata_dummy_irq_on);
-EXPORT_SYMBOL_GPL(ata_irq_ack);
-EXPORT_SYMBOL_GPL(ata_dummy_irq_ack);
 EXPORT_SYMBOL_GPL(ata_dev_try_classify);
 
 EXPORT_SYMBOL_GPL(ata_cable_40wire);
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index dd528dbd9cc..ccef99a0337 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -64,46 +64,6 @@ u8 ata_irq_on(struct ata_port *ap)
 	return tmp;
 }
 
-u8 ata_dummy_irq_on (struct ata_port *ap) 	{ return 0; }
-
-/**
- *	ata_irq_ack - Acknowledge a device interrupt.
- *	@ap: Port on which interrupts are enabled.
- *
- *	Wait up to 10 ms for legacy IDE device to become idle (BUSY
- *	or BUSY+DRQ clear).  Obtain dma status and port status from
- *	device.  Clear the interrupt.  Return port status.
- *
- *	LOCKING:
- */
-
-u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
-{
-	unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
-	u8 host_stat = 0, post_stat = 0, status;
-
-	status = ata_busy_wait(ap, bits, 1000);
-	if (status & bits)
-		if (ata_msg_err(ap))
-			printk(KERN_ERR "abnormal status 0x%X\n", status);
-
-	if (ap->ioaddr.bmdma_addr) {
-		/* get controller status; clear intr, err bits */
-		host_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
-		iowrite8(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
-			 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
-
-		post_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
-	}
-	if (ata_msg_intr(ap))
-		printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
-			__FUNCTION__,
-			host_stat, post_stat, status);
-	return status;
-}
-
-u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq) { return 0; }
-
 /**
  *	ata_tf_load - send taskfile registers to host controller
  *	@ap: Port to which output is sent
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 32a10c99c06..9436c496392 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -327,7 +327,6 @@ static struct ata_port_operations ali_early_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -369,7 +368,6 @@ static struct ata_port_operations ali_20_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -408,7 +406,6 @@ static struct ata_port_operations ali_c2_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -446,7 +443,6 @@ static struct ata_port_operations ali_c5_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index d0cebe16a8e..46f829c838b 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -358,7 +358,6 @@ static struct ata_port_operations amd33_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -393,7 +392,6 @@ static struct ata_port_operations amd66_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -428,7 +426,6 @@ static struct ata_port_operations amd100_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -463,7 +460,6 @@ static struct ata_port_operations amd133_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -498,7 +494,6 @@ static struct ata_port_operations nv100_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -533,7 +528,6 @@ static struct ata_port_operations nv133_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
index 361f2fca7e5..8c864353596 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -361,7 +361,6 @@ static const struct ata_port_operations artop6210_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -394,7 +393,6 @@ static const struct ata_port_operations artop6260_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index 656f4d0a572..f2bfdeb4402 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -262,7 +262,6 @@ static struct ata_port_operations atiixp_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_cmd640.c b/drivers/ata/pata_cmd640.c
index 0feb5ae8c48..a292ed97246 100644
--- a/drivers/ata/pata_cmd640.c
+++ b/drivers/ata/pata_cmd640.c
@@ -213,7 +213,6 @@ static struct ata_port_operations cmd640_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= cmd640_port_start,
 };
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index 922902a1b4a..d308c464464 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -313,7 +313,6 @@ static struct ata_port_operations cmd64x_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -348,7 +347,6 @@ static struct ata_port_operations cmd646r1_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -383,7 +381,6 @@ static struct ata_port_operations cmd648_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index e2459088cdc..300dcff949e 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -184,7 +184,6 @@ static struct ata_port_operations cs5520_port_ops = {
 
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index eaaea848b64..2b770072f39 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -209,7 +209,6 @@ static struct ata_port_operations cs5530_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_cs5535.c b/drivers/ata/pata_cs5535.c
index 360b6f32e17..94b1a9caf3c 100644
--- a/drivers/ata/pata_cs5535.c
+++ b/drivers/ata/pata_cs5535.c
@@ -206,7 +206,6 @@ static struct ata_port_operations cs5535_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_cypress.c b/drivers/ata/pata_cypress.c
index 6cbc8778bf4..8c439a9bb5d 100644
--- a/drivers/ata/pata_cypress.c
+++ b/drivers/ata/pata_cypress.c
@@ -158,7 +158,6 @@ static struct ata_port_operations cy82c693_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_efar.c b/drivers/ata/pata_efar.c
index 9f6fae6e38b..4d646ffb257 100644
--- a/drivers/ata/pata_efar.c
+++ b/drivers/ata/pata_efar.c
@@ -279,7 +279,6 @@ static const struct ata_port_operations efar_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index 6f7d34ad19e..508d1cab52d 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -342,7 +342,6 @@ static struct ata_port_operations hpt366_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index 1a4d0ad68d1..896e6e31c67 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -673,7 +673,6 @@ static struct ata_port_operations hpt370_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -712,7 +711,6 @@ static struct ata_port_operations hpt370a_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -752,7 +750,6 @@ static struct ata_port_operations hpt372_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -792,7 +789,6 @@ static struct ata_port_operations hpt374_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index 739a89180eb..2b7f099ac78 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -391,7 +391,6 @@ static struct ata_port_operations hpt3x2n_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_hpt3x3.c b/drivers/ata/pata_hpt3x3.c
index be0f05efac6..a2f81f40d7a 100644
--- a/drivers/ata/pata_hpt3x3.c
+++ b/drivers/ata/pata_hpt3x3.c
@@ -153,7 +153,6 @@ static struct ata_port_operations hpt3x3_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_icside.c b/drivers/ata/pata_icside.c
index 64a711776c4..ffcccfc0b9d 100644
--- a/drivers/ata/pata_icside.c
+++ b/drivers/ata/pata_icside.c
@@ -357,23 +357,6 @@ static void pata_icside_error_handler(struct ata_port *ap)
 			   pata_icside_postreset);
 }
 
-static u8 pata_icside_irq_ack(struct ata_port *ap, unsigned int chk_drq)
-{
-	unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
-	u8 status;
-
-	status = ata_busy_wait(ap, bits, 1000);
-	if (status & bits)
-		if (ata_msg_err(ap))
-			printk(KERN_ERR "abnormal status 0x%X\n", status);
-
-	if (ata_msg_intr(ap))
-		printk(KERN_INFO "%s: irq ack: drv_stat 0x%X\n",
-			__FUNCTION__, status);
-
-	return status;
-}
-
 static struct ata_port_operations pata_icside_port_ops = {
 	.port_disable		= ata_port_disable,
 
@@ -403,7 +386,6 @@ static struct ata_port_operations pata_icside_port_ops = {
 
 	.irq_clear		= ata_dummy_noret,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= pata_icside_irq_ack,
 
 	.port_start		= pata_icside_port_start,
 
diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
index 9e553c54203..b8d6d5c4353 100644
--- a/drivers/ata/pata_isapnp.c
+++ b/drivers/ata/pata_isapnp.c
@@ -58,7 +58,6 @@ static struct ata_port_operations isapnp_port_ops = {
 
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_it8213.c b/drivers/ata/pata_it8213.c
index 1daf1e19bdf..8aae9d7171c 100644
--- a/drivers/ata/pata_it8213.c
+++ b/drivers/ata/pata_it8213.c
@@ -289,7 +289,6 @@ static const struct ata_port_operations it8213_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index f32d9b7ab49..0179b29c515 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -650,7 +650,6 @@ static struct ata_port_operations it821x_smart_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= it821x_port_start,
 };
@@ -687,7 +686,6 @@ static struct ata_port_operations it821x_passthru_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_handler	= ata_interrupt,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= it821x_port_start,
 };
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 6bf1709508a..ce1f9b17ad3 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -127,7 +127,6 @@ static struct ata_port_operations ixp4xx_port_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_dummy_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
index 1619b86b74a..26f84063859 100644
--- a/drivers/ata/pata_jmicron.c
+++ b/drivers/ata/pata_jmicron.c
@@ -168,7 +168,6 @@ static const struct ata_port_operations jmicron_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	/* Generic PATA PCI ATA helpers */
 	.port_start		= ata_port_start,
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index cfb2bc86a1d..6529d34f037 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -171,7 +171,6 @@ static struct ata_port_operations simple_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -200,7 +199,6 @@ static struct ata_port_operations legacy_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -316,7 +314,6 @@ static struct ata_port_operations pdc20230_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -372,7 +369,6 @@ static struct ata_port_operations ht6560a_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -439,7 +435,6 @@ static struct ata_port_operations ht6560b_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -561,7 +556,6 @@ static struct ata_port_operations opti82c611a_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -695,7 +689,6 @@ static struct ata_port_operations opti82c46x_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
index b4dd18f3fa5..021d9d9218b 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -139,7 +139,6 @@ static const struct ata_port_operations marvell_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	/* Generic PATA PCI ATA helpers */
 	.port_start		= ata_port_start,
diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c
index 099f4cdc4cd..6e3fac2fedc 100644
--- a/drivers/ata/pata_mpc52xx.c
+++ b/drivers/ata/pata_mpc52xx.c
@@ -299,7 +299,6 @@ static struct ata_port_operations mpc52xx_ata_port_ops = {
 	.data_xfer		= ata_data_xfer,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.port_start		= ata_port_start,
 };
 
diff --git a/drivers/ata/pata_mpiix.c b/drivers/ata/pata_mpiix.c
index 36c964b9e7d..8a82fcd4fa3 100644
--- a/drivers/ata/pata_mpiix.c
+++ b/drivers/ata/pata_mpiix.c
@@ -190,7 +190,6 @@ static struct ata_port_operations mpiix_port_ops = {
 
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_netcell.c b/drivers/ata/pata_netcell.c
index 40eb574828b..2d64c58482f 100644
--- a/drivers/ata/pata_netcell.c
+++ b/drivers/ata/pata_netcell.c
@@ -68,7 +68,6 @@ static const struct ata_port_operations netcell_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	/* Generic PATA PCI ATA helpers */
 	.port_start		= ata_port_start,
diff --git a/drivers/ata/pata_ns87410.c b/drivers/ata/pata_ns87410.c
index 65a21772771..00a763c67f9 100644
--- a/drivers/ata/pata_ns87410.c
+++ b/drivers/ata/pata_ns87410.c
@@ -185,7 +185,6 @@ static struct ata_port_operations ns87410_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_oldpiix.c b/drivers/ata/pata_oldpiix.c
index 5b2c86fe9fc..851dae96001 100644
--- a/drivers/ata/pata_oldpiix.c
+++ b/drivers/ata/pata_oldpiix.c
@@ -266,7 +266,6 @@ static const struct ata_port_operations oldpiix_pata_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_opti.c b/drivers/ata/pata_opti.c
index 5770c7755a6..0ab300cda9b 100644
--- a/drivers/ata/pata_opti.c
+++ b/drivers/ata/pata_opti.c
@@ -210,7 +210,6 @@ static struct ata_port_operations opti_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_optidma.c b/drivers/ata/pata_optidma.c
index 09ef725afd9..51c49283fb3 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -398,7 +398,6 @@ static struct ata_port_operations optidma_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -434,7 +433,6 @@ static struct ata_port_operations optiplus_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index 9bfe12ac851..f2167729c3d 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -127,7 +127,6 @@ static struct ata_port_operations pcmcia_port_ops = {
 
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_sff_port_start,
 };
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index db069d7515b..7c6df320c83 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -173,7 +173,6 @@ static struct ata_port_operations pdc2027x_pata100_ops = {
 
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -208,7 +207,6 @@ static struct ata_port_operations pdc2027x_pata133_ops = {
 
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index 92447bed5e7..b03b3387245 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -275,7 +275,6 @@ static struct ata_port_operations pdc2024x_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -310,7 +309,6 @@ static struct ata_port_operations pdc2026x_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index 9dc628931e9..a616616706d 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -89,7 +89,6 @@ static struct ata_port_operations pata_platform_port_ops = {
 
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_dummy_ret0,
 };
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index ec2206e820a..ade5a442166 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -192,7 +192,6 @@ static struct ata_port_operations qdi6500_port_ops = {
 
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -220,7 +219,6 @@ static struct ata_port_operations qdi6580_port_ops = {
 
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_radisys.c b/drivers/ata/pata_radisys.c
index 7d1aabed422..66b9a341931 100644
--- a/drivers/ata/pata_radisys.c
+++ b/drivers/ata/pata_radisys.c
@@ -231,7 +231,6 @@ static const struct ata_port_operations radisys_pata_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index de3698cf3b8..98784647c7e 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -99,7 +99,6 @@ static struct ata_port_operations rz1000_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c
index 5edf67b1f3b..61edff4a5c6 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -227,7 +227,6 @@ static struct ata_port_operations sc1200_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index 63fe99a10cd..95f04b81352 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -838,38 +838,6 @@ static u8 scc_irq_on (struct ata_port *ap)
 	return tmp;
 }
 
-/**
- *	scc_irq_ack - Acknowledge a device interrupt.
- *	@ap: Port on which interrupts are enabled.
- *
- *	Note: Original code is ata_irq_ack().
- */
-
-static u8 scc_irq_ack (struct ata_port *ap, unsigned int chk_drq)
-{
-	unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
-	u8 host_stat, post_stat, status;
-
-	status = ata_busy_wait(ap, bits, 1000);
-	if (status & bits)
-		if (ata_msg_err(ap))
-			printk(KERN_ERR "abnormal status 0x%X\n", status);
-
-	/* get controller status; clear intr, err bits */
-	host_stat = in_be32(ap->ioaddr.bmdma_addr + SCC_DMA_STATUS);
-	out_be32(ap->ioaddr.bmdma_addr + SCC_DMA_STATUS,
-		 host_stat | ATA_DMA_INTR | ATA_DMA_ERR);
-
-	post_stat = in_be32(ap->ioaddr.bmdma_addr + SCC_DMA_STATUS);
-
-	if (ata_msg_intr(ap))
-		printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
-		       __FUNCTION__,
-		       host_stat, post_stat, status);
-
-	return status;
-}
-
 /**
  *	scc_bmdma_freeze - Freeze BMDMA controller port
  *	@ap: port to freeze
@@ -1047,7 +1015,6 @@ static const struct ata_port_operations scc_pata_ops = {
 
 	.irq_clear		= scc_bmdma_irq_clear,
 	.irq_on			= scc_irq_on,
-	.irq_ack		= scc_irq_ack,
 
 	.port_start		= scc_port_start,
 	.port_stop		= scc_port_stop,
diff --git a/drivers/ata/pata_serverworks.c b/drivers/ata/pata_serverworks.c
index 0faf99c8f13..c87cd67f415 100644
--- a/drivers/ata/pata_serverworks.c
+++ b/drivers/ata/pata_serverworks.c
@@ -348,7 +348,6 @@ static struct ata_port_operations serverworks_osb4_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -384,7 +383,6 @@ static struct ata_port_operations serverworks_csb_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index 45515a22d85..c5abf661654 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -267,7 +267,6 @@ static struct ata_port_operations sil680_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index b72227676f0..72850667d37 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -559,7 +559,6 @@ static const struct ata_port_operations sis_133_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -593,7 +592,6 @@ static const struct ata_port_operations sis_133_for_sata_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -627,7 +625,6 @@ static const struct ata_port_operations sis_133_early_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -661,7 +658,6 @@ static const struct ata_port_operations sis_100_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -695,7 +691,6 @@ static const struct ata_port_operations sis_66_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -729,7 +724,6 @@ static const struct ata_port_operations sis_old_ops = {
 	.irq_handler		= ata_interrupt,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index 375c3705dc4..1c50c191e4b 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -254,7 +254,6 @@ static struct ata_port_operations sl82c105_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_triflex.c b/drivers/ata/pata_triflex.c
index bc4b6f6be96..2a55eed45ad 100644
--- a/drivers/ata/pata_triflex.c
+++ b/drivers/ata/pata_triflex.c
@@ -227,7 +227,6 @@ static struct ata_port_operations triflex_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index b612808a319..4ddcae8b8c9 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -375,7 +375,6 @@ static struct ata_port_operations via_port_ops = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
@@ -411,7 +410,6 @@ static struct ata_port_operations via_port_ops_noirq = {
 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pata_winbond.c b/drivers/ata/pata_winbond.c
index c3757033007..c1647da5554 100644
--- a/drivers/ata/pata_winbond.c
+++ b/drivers/ata/pata_winbond.c
@@ -160,7 +160,6 @@ static struct ata_port_operations winbond_port_ops = {
 
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
-	.irq_ack	= ata_irq_ack,
 
 	.port_start	= ata_port_start,
 };
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index 304c19b9b0f..7dd7361289c 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -177,7 +177,6 @@ static const struct ata_port_operations adma_ata_ops = {
 	.error_handler		= adma_error_handler,
 	.irq_clear		= adma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.port_start		= adma_port_start,
 	.port_stop		= adma_port_stop,
 	.host_stop		= adma_host_stop,
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 95caba0f910..d6a3e286c79 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -569,7 +569,6 @@ static struct ata_port_operations inic_port_ops = {
 
 	.irq_clear		= inic_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.qc_prep	 	= ata_qc_prep,
 	.qc_issue		= inic_qc_issue,
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 56784ce1054..393fc655f8c 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -499,7 +499,6 @@ static const struct ata_port_operations mv5_ops = {
 
 	.irq_clear		= mv_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.error_handler		= mv_error_handler,
 	.post_internal_cmd	= mv_post_int_cmd,
@@ -530,7 +529,6 @@ static const struct ata_port_operations mv6_ops = {
 
 	.irq_clear		= mv_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.error_handler		= mv_error_handler,
 	.post_internal_cmd	= mv_post_int_cmd,
@@ -561,7 +559,6 @@ static const struct ata_port_operations mv_iie_ops = {
 
 	.irq_clear		= mv_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.error_handler		= mv_error_handler,
 	.post_internal_cmd	= mv_post_int_cmd,
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 884d9f05e6c..88ecca6343e 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -359,7 +359,6 @@ static const struct ata_port_operations nv_generic_ops = {
 	.data_xfer		= ata_data_xfer,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= nv_scr_read,
 	.scr_write		= nv_scr_write,
 	.port_start		= ata_port_start,
@@ -385,7 +384,6 @@ static const struct ata_port_operations nv_nf2_ops = {
 	.data_xfer		= ata_data_xfer,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= nv_scr_read,
 	.scr_write		= nv_scr_write,
 	.port_start		= ata_port_start,
@@ -411,7 +409,6 @@ static const struct ata_port_operations nv_ck804_ops = {
 	.data_xfer		= ata_data_xfer,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= nv_scr_read,
 	.scr_write		= nv_scr_write,
 	.port_start		= ata_port_start,
@@ -439,7 +436,6 @@ static const struct ata_port_operations nv_adma_ops = {
 	.data_xfer		= ata_data_xfer,
 	.irq_clear		= nv_adma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= nv_scr_read,
 	.scr_write		= nv_scr_write,
 	.port_start		= nv_adma_port_start,
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index c7238ce8354..37d737b442b 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -185,7 +185,6 @@ static const struct ata_port_operations pdc_sata_ops = {
 	.data_xfer		= ata_data_xfer,
 	.irq_clear		= pdc_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.scr_read		= pdc_sata_scr_read,
 	.scr_write		= pdc_sata_scr_write,
@@ -212,7 +211,6 @@ static const struct ata_port_operations pdc_old_sata_ops = {
 	.data_xfer		= ata_data_xfer,
 	.irq_clear		= pdc_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.scr_read		= pdc_sata_scr_read,
 	.scr_write		= pdc_sata_scr_write,
@@ -238,7 +236,6 @@ static const struct ata_port_operations pdc_pata_ops = {
 	.data_xfer		= ata_data_xfer,
 	.irq_clear		= pdc_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= pdc_common_port_start,
 };
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index ef1ad69c26e..5a60ab72ecb 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -159,7 +159,6 @@ static const struct ata_port_operations qs_ata_ops = {
 	.eng_timeout		= qs_eng_timeout,
 	.irq_clear		= qs_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= qs_scr_read,
 	.scr_write		= qs_scr_write,
 	.port_start		= qs_port_start,
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 802d679dc99..1930e7cf143 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -207,7 +207,6 @@ static const struct ata_port_operations sil_ops = {
 	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= sil_scr_read,
 	.scr_write		= sil_scr_write,
 	.port_start		= ata_port_start,
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index e2cccc7f435..961b3f201a3 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -398,8 +398,6 @@ static const struct ata_port_operations sil24_ops = {
 	.qc_issue		= sil24_qc_issue,
 
 	.irq_clear		= sil24_irq_clear,
-	.irq_on			= ata_dummy_irq_on,
-	.irq_ack		= ata_dummy_irq_ack,
 
 	.scr_read		= sil24_scr_read,
 	.scr_write		= sil24_scr_write,
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index 41c1d6e8f1f..691017eddbb 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -123,7 +123,6 @@ static const struct ata_port_operations sis_ops = {
 	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= sis_scr_read,
 	.scr_write		= sis_scr_write,
 	.port_start		= ata_port_start,
diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index d9678e7bc3a..006a720da40 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -349,7 +349,6 @@ static const struct ata_port_operations k2_sata_ops = {
 	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= k2_sata_scr_read,
 	.scr_write		= k2_sata_scr_write,
 	.port_start		= ata_port_start,
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 12691f09193..d5cbd16629a 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -267,7 +267,6 @@ static const struct ata_port_operations pdc_20621_ops = {
 	.eng_timeout		= pdc_eng_timeout,
 	.irq_clear		= pdc20621_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.port_start		= pdc_port_start,
 };
 
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index e6b8b45279a..d4514e2149b 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -117,7 +117,6 @@ static const struct ata_port_operations uli_ops = {
 
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.scr_read		= uli_scr_read,
 	.scr_write		= uli_scr_write,
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 690280660b8..4b25c3ef986 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -146,7 +146,6 @@ static const struct ata_port_operations vt6420_sata_ops = {
 
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -180,7 +179,6 @@ static const struct ata_port_operations vt6421_pata_ops = {
 
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.port_start		= ata_port_start,
 };
@@ -211,7 +209,6 @@ static const struct ata_port_operations vt6421_sata_ops = {
 
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 
 	.scr_read		= svia_scr_read,
 	.scr_write		= svia_scr_write,
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index 9586b8b51ce..55fb2e0b369 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -336,7 +336,6 @@ static const struct ata_port_operations vsc_sata_ops = {
 	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
-	.irq_ack		= ata_irq_ack,
 	.scr_read		= vsc_sata_scr_read,
 	.scr_write		= vsc_sata_scr_write,
 	.port_start		= ata_port_start,
diff --git a/include/linux/libata.h b/include/linux/libata.h
index b89d191ceb2..9295cd541ff 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -644,7 +644,6 @@ struct ata_port_operations {
 	irq_handler_t irq_handler;
 	void (*irq_clear) (struct ata_port *);
 	u8 (*irq_on) (struct ata_port *);
-	u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
 
 	int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
 	int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
@@ -852,9 +851,6 @@ extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 extern u8 ata_irq_on(struct ata_port *ap);
-extern u8 ata_dummy_irq_on(struct ata_port *ap);
-extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
-extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
 
 extern int ata_cable_40wire(struct ata_port *ap);
 extern int ata_cable_80wire(struct ata_port *ap);
-- 
cgit v1.2.3-70-g09d2


From e1ddb4b6a2c9b2c72991eb8640ef2f50691ac502 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 16 Aug 2007 02:33:36 -0400
Subject: [libata] add ACPI cable detect API

Combined from two Alan Cox patches:

1) libata: ACPI checks for 80wire cable

We can use the ACPI mode information with several drivers as a hint to
cable type. If the ACPI mode set by the BIOS is faster than UDMA33 then
we know the BIOS thinks there are 80wire cables. If it doesn't set such a
mode or it has no ACPI method then we get no further information and can
rely on existing approaches

Introduce the function headers needed. Null it out for non ACPI boxes

Signed-off-by: Alan Cox <alan@redhat.com>

2) libata: ACPI checks for 80wire cable

Provide actual methods for checking if the ACPI support thinks the cable
is 80wire, or doesn't know

Signed-off-by: Alan Cox <alan@redhat.com>

Combined into a single changeset and
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-acpi.c | 38 ++++++++++++++++++++++++++++++++++++++
 include/linux/libata.h    |  6 ++++++
 2 files changed, 44 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 43af2e06d44..dc9842ec6f0 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -296,6 +296,44 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
 	return rc;
 }
 
+/**
+ * ata_acpi_cbl_80wire		-	Check for 80 wire cable
+ * @ap: Port to check
+ *
+ * Return 1 if the ACPI mode data for this port indicates the BIOS selected
+ * an 80wire mode.
+ */
+
+int ata_acpi_cbl_80wire(struct ata_port *ap)
+{
+	struct ata_acpi_gtm gtm;
+	int valid = 0;
+	
+	/* No _GTM data, no information */
+	if (ata_acpi_gtm(ap, &gtm) < 0)
+		return 0;
+		
+	/* Split timing, DMA enabled */
+	if ((gtm.flags & 0x11) == 0x11 && gtm.drive[0].dma < 55)
+		valid |= 1;
+	if ((gtm.flags & 0x14) == 0x14 && gtm.drive[1].dma < 55)
+		valid |= 2;
+	/* Shared timing, DMA enabled */
+	if ((gtm.flags & 0x11) == 0x01 && gtm.drive[0].dma < 55)
+		valid |= 1;
+	if ((gtm.flags & 0x14) == 0x04 && gtm.drive[0].dma < 55)
+		valid |= 2;
+
+	/* Drive check */
+	if ((valid & 1) && ata_dev_enabled(&ap->link.device[0]))
+		return 1;
+	if ((valid & 2) && ata_dev_enabled(&ap->link.device[1]))
+		return 1;
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
+
 /**
  * taskfile_load_raw - send taskfile registers to host controller
  * @dev: target ATA device
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 9295cd541ff..382898ef654 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -885,6 +885,12 @@ enum {
 				  ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
 };
 
+/* libata-acpi.c */
+#ifdef CONFIG_ATA_ACPI
+extern int ata_acpi_cbl_80wire(struct ata_port *ap);
+#else
+static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
+#endif
 
 #ifdef CONFIG_PCI
 struct pci_bits {
-- 
cgit v1.2.3-70-g09d2


From e708eb9bc0515f36d77477877e74b6b9056b5879 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 26 Jul 2007 18:37:28 +0100
Subject: libata pata_amd: ACPI checks for 80wire cable

We can make use of this on the pata_amd driver as many Nvidia devices
don't have reliable cable detect.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_amd.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index 46f829c838b..c95922f8cc5 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -270,6 +270,9 @@ static int nv_cable_detect(struct ata_port *ap)
  	pci_read_config_word(pdev, 0x62 - 2 * ap->port_no, &udma);
  	if ((udma & 0xC4) == 0xC4 || (udma & 0xC400) == 0xC400)
 		cbl = ATA_CBL_PATA80;
+	/* And a triple check across suspend/resume with ACPI around */
+	if (ata_acpi_cbl_80wire(ap))
+		cbl = ATA_CBL_PATA80;
 	return cbl;
 }
 
-- 
cgit v1.2.3-70-g09d2


From 7d73a363dea186a864f6295bbe842da8044d42cd Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 26 Jul 2007 18:38:06 +0100
Subject: libata pata_via: ACPI checks for 80wire cable

Testing this on the VIA boards fixes several problems with otherwise
undetectable SATA bridge chips

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_via.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 4ddcae8b8c9..f11b87e18aa 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -184,6 +184,9 @@ static int via_cable_detect(struct ata_port *ap) {
 	   two drives */
 	if (ata66 & (0x10100000 >> (16 * ap->port_no)))
 		return ATA_CBL_PATA80;
+	/* Check with ACPI so we can spot BIOS reported SATA bridges */
+	if (ata_acpi_cbl_80wire(ap))
+		return ATA_CBL_PATA80;
 	return ATA_CBL_PATA40;
 }
 
-- 
cgit v1.2.3-70-g09d2


From ac8869d56d95a8c74403e6f7a47d74fcfcc1b988 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Thu, 16 Aug 2007 03:17:03 -0400
Subject: [libata] Remove ->port_disable() hook

It was always set to ata_port_disable().  Removed the hook, and replaced
the very few ap->ops->port_disable() callsites with direct calls to
ata_port_disable().

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c              | 4 ----
 drivers/ata/ata_generic.c       | 1 -
 drivers/ata/ata_piix.c          | 4 ----
 drivers/ata/libata-core.c       | 4 +---
 drivers/ata/pata_ali.c          | 5 -----
 drivers/ata/pata_amd.c          | 6 ------
 drivers/ata/pata_artop.c        | 2 --
 drivers/ata/pata_atiixp.c       | 1 -
 drivers/ata/pata_cmd640.c       | 1 -
 drivers/ata/pata_cmd64x.c       | 3 ---
 drivers/ata/pata_cs5520.c       | 1 -
 drivers/ata/pata_cs5530.c       | 1 -
 drivers/ata/pata_cs5535.c       | 1 -
 drivers/ata/pata_cypress.c      | 1 -
 drivers/ata/pata_efar.c         | 1 -
 drivers/ata/pata_hpt366.c       | 1 -
 drivers/ata/pata_hpt37x.c       | 4 ----
 drivers/ata/pata_hpt3x2n.c      | 1 -
 drivers/ata/pata_hpt3x3.c       | 1 -
 drivers/ata/pata_icside.c       | 2 --
 drivers/ata/pata_isapnp.c       | 1 -
 drivers/ata/pata_it8213.c       | 1 -
 drivers/ata/pata_it821x.c       | 2 --
 drivers/ata/pata_ixp4xx_cf.c    | 1 -
 drivers/ata/pata_jmicron.c      | 2 --
 drivers/ata/pata_legacy.c       | 7 -------
 drivers/ata/pata_marvell.c      | 2 --
 drivers/ata/pata_mpc52xx.c      | 1 -
 drivers/ata/pata_mpiix.c        | 1 -
 drivers/ata/pata_netcell.c      | 2 --
 drivers/ata/pata_ns87410.c      | 1 -
 drivers/ata/pata_oldpiix.c      | 1 -
 drivers/ata/pata_opti.c         | 1 -
 drivers/ata/pata_optidma.c      | 2 --
 drivers/ata/pata_pcmcia.c       | 1 -
 drivers/ata/pata_pdc2027x.c     | 2 --
 drivers/ata/pata_pdc202xx_old.c | 2 --
 drivers/ata/pata_platform.c     | 1 -
 drivers/ata/pata_qdi.c          | 2 --
 drivers/ata/pata_radisys.c      | 1 -
 drivers/ata/pata_rz1000.c       | 1 -
 drivers/ata/pata_sc1200.c       | 1 -
 drivers/ata/pata_scc.c          | 1 -
 drivers/ata/pata_serverworks.c  | 2 --
 drivers/ata/pata_sil680.c       | 1 -
 drivers/ata/pata_sis.c          | 6 ------
 drivers/ata/pata_sl82c105.c     | 1 -
 drivers/ata/pata_triflex.c      | 1 -
 drivers/ata/pata_via.c          | 2 --
 drivers/ata/pata_winbond.c      | 1 -
 drivers/ata/pdc_adma.c          | 1 -
 drivers/ata/sata_inic162x.c     | 1 -
 drivers/ata/sata_mv.c           | 6 ------
 drivers/ata/sata_nv.c           | 4 ----
 drivers/ata/sata_promise.c      | 3 ---
 drivers/ata/sata_qstor.c        | 1 -
 drivers/ata/sata_sil.c          | 1 -
 drivers/ata/sata_sil24.c        | 2 --
 drivers/ata/sata_sis.c          | 1 -
 drivers/ata/sata_svw.c          | 1 -
 drivers/ata/sata_sx4.c          | 1 -
 drivers/ata/sata_uli.c          | 2 --
 drivers/ata/sata_via.c          | 6 ------
 drivers/ata/sata_vsc.c          | 1 -
 drivers/scsi/ipr.c              | 5 ++---
 drivers/scsi/libsas/sas_ata.c   | 1 -
 include/linux/libata.h          | 2 --
 67 files changed, 3 insertions(+), 132 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index c888c966a02..0d80189d03f 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -264,8 +264,6 @@ static struct scsi_host_template ahci_sht = {
 };
 
 static const struct ata_port_operations ahci_ops = {
-	.port_disable		= ata_port_disable,
-
 	.check_status		= ahci_check_status,
 	.check_altstatus	= ahci_check_status,
 	.dev_select		= ata_noop_dev_select,
@@ -296,8 +294,6 @@ static const struct ata_port_operations ahci_ops = {
 };
 
 static const struct ata_port_operations ahci_vt8251_ops = {
-	.port_disable		= ata_port_disable,
-
 	.check_status		= ahci_check_status,
 	.check_altstatus	= ahci_check_status,
 	.dev_select		= ata_noop_dev_select,
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 6ec1bbc4fcc..afe71a6e0da 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -95,7 +95,6 @@ static struct scsi_host_template generic_sht = {
 static struct ata_port_operations generic_port_ops = {
 	.set_mode	= generic_set_mode,
 
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 68bc0ae671c..45e3b60f26d 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -290,7 +290,6 @@ static struct scsi_host_template piix_sht = {
 };
 
 static const struct ata_port_operations piix_pata_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= piix_set_piomode,
 	.set_dmamode		= piix_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
@@ -323,7 +322,6 @@ static const struct ata_port_operations piix_pata_ops = {
 };
 
 static const struct ata_port_operations ich_pata_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= piix_set_piomode,
 	.set_dmamode		= ich_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
@@ -356,8 +354,6 @@ static const struct ata_port_operations ich_pata_ops = {
 };
 
 static const struct ata_port_operations piix_sata_ops = {
-	.port_disable		= ata_port_disable,
-
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4f8b8d210cf..43c329544c0 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2208,7 +2208,6 @@ int ata_bus_probe(struct ata_port *ap)
 
 	/* no device present, disable port */
 	ata_port_disable(ap);
-	ap->ops->port_disable(ap);
 	return -ENODEV;
 
  fail:
@@ -3227,7 +3226,7 @@ void ata_bus_reset(struct ata_port *ap)
 
 err_out:
 	ata_port_printk(ap, KERN_ERR, "disabling port\n");
-	ap->ops->port_disable(ap);
+	ata_port_disable(ap);
 
 	DPRINTK("EXIT\n");
 }
@@ -6986,7 +6985,6 @@ static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
 }
 
 const struct ata_port_operations ata_dummy_port_ops = {
-	.port_disable		= ata_port_disable,
 	.check_status		= ata_dummy_check_status,
 	.check_altstatus	= ata_dummy_check_status,
 	.dev_select		= ata_noop_dev_select,
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 9436c496392..7fc11ef0fd2 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -305,7 +305,6 @@ static struct scsi_host_template ali_sht = {
  */
 
 static struct ata_port_operations ali_early_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= ali_set_piomode,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
@@ -336,8 +335,6 @@ static struct ata_port_operations ali_early_port_ops = {
  *	detect
  */
 static struct ata_port_operations ali_20_port_ops = {
-	.port_disable	= ata_port_disable,
-
 	.set_piomode	= ali_set_piomode,
 	.set_dmamode	= ali_set_dmamode,
 	.mode_filter	= ali_20_filter,
@@ -376,7 +373,6 @@ static struct ata_port_operations ali_20_port_ops = {
  *	Port operations for DMA capable ALi with cable detect
  */
 static struct ata_port_operations ali_c2_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= ali_set_piomode,
 	.set_dmamode	= ali_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -414,7 +410,6 @@ static struct ata_port_operations ali_c2_port_ops = {
  *	Port operations for DMA capable ALi with cable detect and LBA48
  */
 static struct ata_port_operations ali_c5_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= ali_set_piomode,
 	.set_dmamode	= ali_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index c95922f8cc5..b1db7ff8edd 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -332,7 +332,6 @@ static struct scsi_host_template amd_sht = {
 };
 
 static struct ata_port_operations amd33_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= amd33_set_piomode,
 	.set_dmamode	= amd33_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -366,7 +365,6 @@ static struct ata_port_operations amd33_port_ops = {
 };
 
 static struct ata_port_operations amd66_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= amd66_set_piomode,
 	.set_dmamode	= amd66_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -400,7 +398,6 @@ static struct ata_port_operations amd66_port_ops = {
 };
 
 static struct ata_port_operations amd100_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= amd100_set_piomode,
 	.set_dmamode	= amd100_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -434,7 +431,6 @@ static struct ata_port_operations amd100_port_ops = {
 };
 
 static struct ata_port_operations amd133_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= amd133_set_piomode,
 	.set_dmamode	= amd133_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -468,7 +464,6 @@ static struct ata_port_operations amd133_port_ops = {
 };
 
 static struct ata_port_operations nv100_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= nv100_set_piomode,
 	.set_dmamode	= nv100_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -502,7 +497,6 @@ static struct ata_port_operations nv100_port_ops = {
 };
 
 static struct ata_port_operations nv133_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= nv133_set_piomode,
 	.set_dmamode	= nv133_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
index 8c864353596..1827843cda4 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -332,7 +332,6 @@ static struct scsi_host_template artop_sht = {
 };
 
 static const struct ata_port_operations artop6210_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= artop6210_set_piomode,
 	.set_dmamode		= artop6210_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
@@ -366,7 +365,6 @@ static const struct ata_port_operations artop6210_ops = {
 };
 
 static const struct ata_port_operations artop6260_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= artop6260_set_piomode,
 	.set_dmamode		= artop6260_set_dmamode,
 
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index f2bfdeb4402..0077ee783d1 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -233,7 +233,6 @@ static struct scsi_host_template atiixp_sht = {
 };
 
 static struct ata_port_operations atiixp_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= atiixp_set_piomode,
 	.set_dmamode	= atiixp_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_cmd640.c b/drivers/ata/pata_cmd640.c
index a292ed97246..f09d4fa275c 100644
--- a/drivers/ata/pata_cmd640.c
+++ b/drivers/ata/pata_cmd640.c
@@ -184,7 +184,6 @@ static struct scsi_host_template cmd640_sht = {
 };
 
 static struct ata_port_operations cmd640_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= cmd640_set_piomode,
 	.mode_filter	= ata_pci_default_filter,
 	.tf_load	= ata_tf_load,
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index d308c464464..9e412c26b2a 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -284,7 +284,6 @@ static struct scsi_host_template cmd64x_sht = {
 };
 
 static struct ata_port_operations cmd64x_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= cmd64x_set_piomode,
 	.set_dmamode	= cmd64x_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -318,7 +317,6 @@ static struct ata_port_operations cmd64x_port_ops = {
 };
 
 static struct ata_port_operations cmd646r1_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= cmd64x_set_piomode,
 	.set_dmamode	= cmd64x_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -352,7 +350,6 @@ static struct ata_port_operations cmd646r1_port_ops = {
 };
 
 static struct ata_port_operations cmd648_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= cmd64x_set_piomode,
 	.set_dmamode	= cmd64x_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index 300dcff949e..fe37e3e80f2 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -158,7 +158,6 @@ static struct scsi_host_template cs5520_sht = {
 };
 
 static struct ata_port_operations cs5520_port_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= cs5520_set_piomode,
 	.set_dmamode		= cs5520_set_dmamode,
 
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index 2b770072f39..adeb3acf84c 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -179,7 +179,6 @@ static struct scsi_host_template cs5530_sht = {
 };
 
 static struct ata_port_operations cs5530_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= cs5530_set_piomode,
 	.set_dmamode	= cs5530_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_cs5535.c b/drivers/ata/pata_cs5535.c
index 94b1a9caf3c..2c73807da62 100644
--- a/drivers/ata/pata_cs5535.c
+++ b/drivers/ata/pata_cs5535.c
@@ -176,7 +176,6 @@ static struct scsi_host_template cs5535_sht = {
 };
 
 static struct ata_port_operations cs5535_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= cs5535_set_piomode,
 	.set_dmamode	= cs5535_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_cypress.c b/drivers/ata/pata_cypress.c
index 8c439a9bb5d..cae44250d81 100644
--- a/drivers/ata/pata_cypress.c
+++ b/drivers/ata/pata_cypress.c
@@ -128,7 +128,6 @@ static struct scsi_host_template cy82c693_sht = {
 };
 
 static struct ata_port_operations cy82c693_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= cy82c693_set_piomode,
 	.set_dmamode	= cy82c693_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_efar.c b/drivers/ata/pata_efar.c
index 4d646ffb257..cc418e34e63 100644
--- a/drivers/ata/pata_efar.c
+++ b/drivers/ata/pata_efar.c
@@ -251,7 +251,6 @@ static struct scsi_host_template efar_sht = {
 };
 
 static const struct ata_port_operations efar_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= efar_set_piomode,
 	.set_dmamode		= efar_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index 508d1cab52d..16cc143460e 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -312,7 +312,6 @@ static struct scsi_host_template hpt36x_sht = {
  */
 
 static struct ata_port_operations hpt366_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= hpt366_set_piomode,
 	.set_dmamode	= hpt366_set_dmamode,
 	.mode_filter	= hpt366_filter,
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index 896e6e31c67..65c0cb21f6a 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -644,7 +644,6 @@ static struct scsi_host_template hpt37x_sht = {
  */
 
 static struct ata_port_operations hpt370_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= hpt370_set_piomode,
 	.set_dmamode	= hpt370_set_dmamode,
 	.mode_filter	= hpt370_filter,
@@ -682,7 +681,6 @@ static struct ata_port_operations hpt370_port_ops = {
  */
 
 static struct ata_port_operations hpt370a_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= hpt370_set_piomode,
 	.set_dmamode	= hpt370_set_dmamode,
 	.mode_filter	= hpt370a_filter,
@@ -721,7 +719,6 @@ static struct ata_port_operations hpt370a_port_ops = {
  */
 
 static struct ata_port_operations hpt372_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= hpt372_set_piomode,
 	.set_dmamode	= hpt372_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -760,7 +757,6 @@ static struct ata_port_operations hpt372_port_ops = {
  */
 
 static struct ata_port_operations hpt374_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= hpt372_set_piomode,
 	.set_dmamode	= hpt372_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index 2b7f099ac78..5559da7f9db 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -361,7 +361,6 @@ static struct scsi_host_template hpt3x2n_sht = {
  */
 
 static struct ata_port_operations hpt3x2n_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= hpt3x2n_set_piomode,
 	.set_dmamode	= hpt3x2n_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_hpt3x3.c b/drivers/ata/pata_hpt3x3.c
index a2f81f40d7a..752394b7265 100644
--- a/drivers/ata/pata_hpt3x3.c
+++ b/drivers/ata/pata_hpt3x3.c
@@ -120,7 +120,6 @@ static struct scsi_host_template hpt3x3_sht = {
 };
 
 static struct ata_port_operations hpt3x3_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= hpt3x3_set_piomode,
 #if defined(CONFIG_PATA_HPT3X3_DMA)
 	.set_dmamode	= hpt3x3_set_dmamode,
diff --git a/drivers/ata/pata_icside.c b/drivers/ata/pata_icside.c
index ffcccfc0b9d..4a69328a4c4 100644
--- a/drivers/ata/pata_icside.c
+++ b/drivers/ata/pata_icside.c
@@ -358,8 +358,6 @@ static void pata_icside_error_handler(struct ata_port *ap)
 }
 
 static struct ata_port_operations pata_icside_port_ops = {
-	.port_disable		= ata_port_disable,
-
 	.set_dmamode		= pata_icside_set_dmamode,
 
 	.tf_load		= ata_tf_load,
diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
index b8d6d5c4353..1def8c05f34 100644
--- a/drivers/ata/pata_isapnp.c
+++ b/drivers/ata/pata_isapnp.c
@@ -38,7 +38,6 @@ static struct scsi_host_template isapnp_sht = {
 };
 
 static struct ata_port_operations isapnp_port_ops = {
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
diff --git a/drivers/ata/pata_it8213.c b/drivers/ata/pata_it8213.c
index 8aae9d7171c..cc989ef3042 100644
--- a/drivers/ata/pata_it8213.c
+++ b/drivers/ata/pata_it8213.c
@@ -261,7 +261,6 @@ static struct scsi_host_template it8213_sht = {
 };
 
 static const struct ata_port_operations it8213_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= it8213_set_piomode,
 	.set_dmamode		= it8213_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 0179b29c515..4188898a66a 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -620,7 +620,6 @@ static struct scsi_host_template it821x_sht = {
 
 static struct ata_port_operations it821x_smart_port_ops = {
 	.set_mode	= it821x_smart_set_mode,
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.mode_filter	= ata_pci_default_filter,
@@ -655,7 +654,6 @@ static struct ata_port_operations it821x_smart_port_ops = {
 };
 
 static struct ata_port_operations it821x_passthru_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= it821x_passthru_set_piomode,
 	.set_dmamode	= it821x_passthru_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index ce1f9b17ad3..7b0d2fc5748 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -107,7 +107,6 @@ static struct ata_port_operations ixp4xx_port_ops = {
 	.set_mode		= ixp4xx_set_mode,
 	.mode_filter		= ata_pci_default_filter,
 
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.exec_command		= ata_exec_command,
diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
index 26f84063859..6d5a81869df 100644
--- a/drivers/ata/pata_jmicron.c
+++ b/drivers/ata/pata_jmicron.c
@@ -141,8 +141,6 @@ static struct scsi_host_template jmicron_sht = {
 };
 
 static const struct ata_port_operations jmicron_ops = {
-	.port_disable		= ata_port_disable,
-
 	/* Task file is PCI ATA format, use helpers */
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 6529d34f037..6cae26f4d27 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -150,7 +150,6 @@ static struct scsi_host_template legacy_sht = {
  */
 
 static struct ata_port_operations simple_port_ops = {
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
@@ -178,7 +177,6 @@ static struct ata_port_operations simple_port_ops = {
 static struct ata_port_operations legacy_port_ops = {
 	.set_mode	= legacy_set_mode,
 
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
@@ -293,7 +291,6 @@ static void pdc_data_xfer_vlb(struct ata_device *adev, unsigned char *buf, unsig
 static struct ata_port_operations pdc20230_port_ops = {
 	.set_piomode	= pdc20230_set_piomode,
 
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
@@ -348,7 +345,6 @@ static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
 static struct ata_port_operations ht6560a_port_ops = {
 	.set_piomode	= ht6560a_set_piomode,
 
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
@@ -414,7 +410,6 @@ static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
 static struct ata_port_operations ht6560b_port_ops = {
 	.set_piomode	= ht6560b_set_piomode,
 
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
@@ -535,7 +530,6 @@ static void opti82c611a_set_piomode(struct ata_port *ap, struct ata_device *adev
 static struct ata_port_operations opti82c611a_port_ops = {
 	.set_piomode	= opti82c611a_set_piomode,
 
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
@@ -668,7 +662,6 @@ static unsigned int opti82c46x_qc_issue_prot(struct ata_queued_cmd *qc)
 static struct ata_port_operations opti82c46x_port_ops = {
 	.set_piomode	= opti82c46x_set_piomode,
 
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
index 021d9d9218b..99d0844c8cb 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -111,8 +111,6 @@ static struct scsi_host_template marvell_sht = {
 };
 
 static const struct ata_port_operations marvell_ops = {
-	.port_disable		= ata_port_disable,
-
 	/* Task file is PCI ATA format, use helpers */
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c
index 6e3fac2fedc..a56694b2833 100644
--- a/drivers/ata/pata_mpc52xx.c
+++ b/drivers/ata/pata_mpc52xx.c
@@ -283,7 +283,6 @@ static struct scsi_host_template mpc52xx_ata_sht = {
 };
 
 static struct ata_port_operations mpc52xx_ata_port_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= mpc52xx_ata_set_piomode,
 	.dev_select		= mpc52xx_ata_dev_select,
 	.tf_load		= ata_tf_load,
diff --git a/drivers/ata/pata_mpiix.c b/drivers/ata/pata_mpiix.c
index 8a82fcd4fa3..b50910938e6 100644
--- a/drivers/ata/pata_mpiix.c
+++ b/drivers/ata/pata_mpiix.c
@@ -169,7 +169,6 @@ static struct scsi_host_template mpiix_sht = {
 };
 
 static struct ata_port_operations mpiix_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= mpiix_set_piomode,
 
 	.tf_load	= ata_tf_load,
diff --git a/drivers/ata/pata_netcell.c b/drivers/ata/pata_netcell.c
index 2d64c58482f..b2c3d076754 100644
--- a/drivers/ata/pata_netcell.c
+++ b/drivers/ata/pata_netcell.c
@@ -40,8 +40,6 @@ static struct scsi_host_template netcell_sht = {
 };
 
 static const struct ata_port_operations netcell_ops = {
-	.port_disable		= ata_port_disable,
-
 	/* Task file is PCI ATA format, use helpers */
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
diff --git a/drivers/ata/pata_ns87410.c b/drivers/ata/pata_ns87410.c
index 00a763c67f9..4b0ddf6ba3b 100644
--- a/drivers/ata/pata_ns87410.c
+++ b/drivers/ata/pata_ns87410.c
@@ -162,7 +162,6 @@ static struct scsi_host_template ns87410_sht = {
 };
 
 static struct ata_port_operations ns87410_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= ns87410_set_piomode,
 
 	.tf_load	= ata_tf_load,
diff --git a/drivers/ata/pata_oldpiix.c b/drivers/ata/pata_oldpiix.c
index 851dae96001..ada719ad45a 100644
--- a/drivers/ata/pata_oldpiix.c
+++ b/drivers/ata/pata_oldpiix.c
@@ -238,7 +238,6 @@ static struct scsi_host_template oldpiix_sht = {
 };
 
 static const struct ata_port_operations oldpiix_pata_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= oldpiix_set_piomode,
 	.set_dmamode		= oldpiix_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
diff --git a/drivers/ata/pata_opti.c b/drivers/ata/pata_opti.c
index 0ab300cda9b..2a4bfbfbe75 100644
--- a/drivers/ata/pata_opti.c
+++ b/drivers/ata/pata_opti.c
@@ -183,7 +183,6 @@ static struct scsi_host_template opti_sht = {
 };
 
 static struct ata_port_operations opti_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= opti_set_piomode,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
diff --git a/drivers/ata/pata_optidma.c b/drivers/ata/pata_optidma.c
index 51c49283fb3..848ae16f239 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -368,7 +368,6 @@ static struct scsi_host_template optidma_sht = {
 };
 
 static struct ata_port_operations optidma_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= optidma_set_pio_mode,
 	.set_dmamode	= optidma_set_dma_mode,
 
@@ -403,7 +402,6 @@ static struct ata_port_operations optidma_port_ops = {
 };
 
 static struct ata_port_operations optiplus_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= optiplus_set_pio_mode,
 	.set_dmamode	= optiplus_set_dma_mode,
 
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index f2167729c3d..5baf531f652 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -107,7 +107,6 @@ static struct scsi_host_template pcmcia_sht = {
 
 static struct ata_port_operations pcmcia_port_ops = {
 	.set_mode	= pcmcia_set_mode,
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 7c6df320c83..5fba36f04ca 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -147,7 +147,6 @@ static struct scsi_host_template pdc2027x_sht = {
 };
 
 static struct ata_port_operations pdc2027x_pata100_ops = {
-	.port_disable		= ata_port_disable,
 	.mode_filter		= ata_pci_default_filter,
 
 	.tf_load		= ata_tf_load,
@@ -178,7 +177,6 @@ static struct ata_port_operations pdc2027x_pata100_ops = {
 };
 
 static struct ata_port_operations pdc2027x_pata133_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= pdc2027x_set_piomode,
 	.set_dmamode		= pdc2027x_set_dmamode,
 	.set_mode		= pdc2027x_set_mode,
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index b03b3387245..9b7077d5148 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -247,7 +247,6 @@ static struct scsi_host_template pdc202xx_sht = {
 };
 
 static struct ata_port_operations pdc2024x_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= pdc202xx_set_piomode,
 	.set_dmamode	= pdc202xx_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -280,7 +279,6 @@ static struct ata_port_operations pdc2024x_port_ops = {
 };
 
 static struct ata_port_operations pdc2026x_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= pdc202xx_set_piomode,
 	.set_dmamode	= pdc202xx_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index a616616706d..b04ce5f9841 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -69,7 +69,6 @@ static struct scsi_host_template pata_platform_sht = {
 static struct ata_port_operations pata_platform_port_ops = {
 	.set_mode		= pata_platform_set_mode,
 
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index ade5a442166..da9ccd23ffc 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -170,7 +170,6 @@ static struct scsi_host_template qdi_sht = {
 };
 
 static struct ata_port_operations qdi6500_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= qdi6500_set_piomode,
 
 	.tf_load	= ata_tf_load,
@@ -197,7 +196,6 @@ static struct ata_port_operations qdi6500_port_ops = {
 };
 
 static struct ata_port_operations qdi6580_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= qdi6580_set_piomode,
 
 	.tf_load	= ata_tf_load,
diff --git a/drivers/ata/pata_radisys.c b/drivers/ata/pata_radisys.c
index 66b9a341931..ece2190971c 100644
--- a/drivers/ata/pata_radisys.c
+++ b/drivers/ata/pata_radisys.c
@@ -203,7 +203,6 @@ static struct scsi_host_template radisys_sht = {
 };
 
 static const struct ata_port_operations radisys_pata_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= radisys_set_piomode,
 	.set_dmamode		= radisys_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index 98784647c7e..5f1a4e180dc 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -73,7 +73,6 @@ static struct scsi_host_template rz1000_sht = {
 static struct ata_port_operations rz1000_port_ops = {
 	.set_mode	= rz1000_set_mode,
 
-	.port_disable	= ata_port_disable,
 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c
index 61edff4a5c6..6c13754c75a 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -197,7 +197,6 @@ static struct scsi_host_template sc1200_sht = {
 };
 
 static struct ata_port_operations sc1200_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= sc1200_set_piomode,
 	.set_dmamode	= sc1200_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index 95f04b81352..e138343b5d4 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -988,7 +988,6 @@ static struct scsi_host_template scc_sht = {
 };
 
 static const struct ata_port_operations scc_pata_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= scc_set_piomode,
 	.set_dmamode		= scc_set_dmamode,
 	.mode_filter		= scc_mode_filter,
diff --git a/drivers/ata/pata_serverworks.c b/drivers/ata/pata_serverworks.c
index c87cd67f415..7c08f25c954 100644
--- a/drivers/ata/pata_serverworks.c
+++ b/drivers/ata/pata_serverworks.c
@@ -318,7 +318,6 @@ static struct scsi_host_template serverworks_sht = {
 };
 
 static struct ata_port_operations serverworks_osb4_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= serverworks_set_piomode,
 	.set_dmamode	= serverworks_set_dmamode,
 	.mode_filter	= serverworks_osb4_filter,
@@ -353,7 +352,6 @@ static struct ata_port_operations serverworks_osb4_port_ops = {
 };
 
 static struct ata_port_operations serverworks_csb_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= serverworks_set_piomode,
 	.set_dmamode	= serverworks_set_dmamode,
 	.mode_filter	= serverworks_csb_filter,
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index c5abf661654..71f206d7b5c 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -238,7 +238,6 @@ static struct scsi_host_template sil680_sht = {
 };
 
 static struct ata_port_operations sil680_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= sil680_set_piomode,
 	.set_dmamode	= sil680_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 72850667d37..4ccf09dac8c 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -531,7 +531,6 @@ static struct scsi_host_template sis_sht = {
 };
 
 static const struct ata_port_operations sis_133_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= sis_133_set_piomode,
 	.set_dmamode		= sis_133_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
@@ -564,7 +563,6 @@ static const struct ata_port_operations sis_133_ops = {
 };
 
 static const struct ata_port_operations sis_133_for_sata_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= sis_133_set_piomode,
 	.set_dmamode		= sis_133_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
@@ -597,7 +595,6 @@ static const struct ata_port_operations sis_133_for_sata_ops = {
 };
 
 static const struct ata_port_operations sis_133_early_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= sis_100_set_piomode,
 	.set_dmamode		= sis_133_early_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
@@ -630,7 +627,6 @@ static const struct ata_port_operations sis_133_early_ops = {
 };
 
 static const struct ata_port_operations sis_100_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= sis_100_set_piomode,
 	.set_dmamode		= sis_100_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
@@ -663,7 +659,6 @@ static const struct ata_port_operations sis_100_ops = {
 };
 
 static const struct ata_port_operations sis_66_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= sis_old_set_piomode,
 	.set_dmamode		= sis_66_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
@@ -696,7 +691,6 @@ static const struct ata_port_operations sis_66_ops = {
 };
 
 static const struct ata_port_operations sis_old_ops = {
-	.port_disable		= ata_port_disable,
 	.set_piomode		= sis_old_set_piomode,
 	.set_dmamode		= sis_old_set_dmamode,
 	.mode_filter		= ata_pci_default_filter,
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index 1c50c191e4b..5bd78437e94 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -225,7 +225,6 @@ static struct scsi_host_template sl82c105_sht = {
 };
 
 static struct ata_port_operations sl82c105_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= sl82c105_set_piomode,
 	.mode_filter	= ata_pci_default_filter,
 
diff --git a/drivers/ata/pata_triflex.c b/drivers/ata/pata_triflex.c
index 2a55eed45ad..dc20b179e3b 100644
--- a/drivers/ata/pata_triflex.c
+++ b/drivers/ata/pata_triflex.c
@@ -198,7 +198,6 @@ static struct scsi_host_template triflex_sht = {
 };
 
 static struct ata_port_operations triflex_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= triflex_set_piomode,
 	.mode_filter	= ata_pci_default_filter,
 
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index f11b87e18aa..e1f20e73a61 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -348,7 +348,6 @@ static struct scsi_host_template via_sht = {
 };
 
 static struct ata_port_operations via_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= via_set_piomode,
 	.set_dmamode	= via_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
@@ -383,7 +382,6 @@ static struct ata_port_operations via_port_ops = {
 };
 
 static struct ata_port_operations via_port_ops_noirq = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= via_set_piomode,
 	.set_dmamode	= via_set_dmamode,
 	.mode_filter	= ata_pci_default_filter,
diff --git a/drivers/ata/pata_winbond.c b/drivers/ata/pata_winbond.c
index c1647da5554..d7555f775d5 100644
--- a/drivers/ata/pata_winbond.c
+++ b/drivers/ata/pata_winbond.c
@@ -138,7 +138,6 @@ static struct scsi_host_template winbond_sht = {
 };
 
 static struct ata_port_operations winbond_port_ops = {
-	.port_disable	= ata_port_disable,
 	.set_piomode	= winbond_set_piomode,
 
 	.tf_load	= ata_tf_load,
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index 7dd7361289c..42fd15aaba0 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -162,7 +162,6 @@ static struct scsi_host_template adma_ata_sht = {
 };
 
 static const struct ata_port_operations adma_ata_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.exec_command		= ata_exec_command,
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index d6a3e286c79..f0ea0e166c1 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -552,7 +552,6 @@ static int inic_port_start(struct ata_port *ap)
 }
 
 static struct ata_port_operations inic_port_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 393fc655f8c..68c3f22890d 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -483,8 +483,6 @@ static struct scsi_host_template mv6_sht = {
 };
 
 static const struct ata_port_operations mv5_ops = {
-	.port_disable		= ata_port_disable,
-
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
@@ -513,8 +511,6 @@ static const struct ata_port_operations mv5_ops = {
 };
 
 static const struct ata_port_operations mv6_ops = {
-	.port_disable		= ata_port_disable,
-
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
@@ -543,8 +539,6 @@ static const struct ata_port_operations mv6_ops = {
 };
 
 static const struct ata_port_operations mv_iie_ops = {
-	.port_disable		= ata_port_disable,
-
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 88ecca6343e..b860f99fc28 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -340,7 +340,6 @@ static struct scsi_host_template nv_adma_sht = {
 };
 
 static const struct ata_port_operations nv_generic_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.exec_command		= ata_exec_command,
@@ -365,7 +364,6 @@ static const struct ata_port_operations nv_generic_ops = {
 };
 
 static const struct ata_port_operations nv_nf2_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.exec_command		= ata_exec_command,
@@ -390,7 +388,6 @@ static const struct ata_port_operations nv_nf2_ops = {
 };
 
 static const struct ata_port_operations nv_ck804_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.exec_command		= ata_exec_command,
@@ -416,7 +413,6 @@ static const struct ata_port_operations nv_ck804_ops = {
 };
 
 static const struct ata_port_operations nv_adma_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= nv_adma_tf_read,
 	.check_atapi_dma	= nv_adma_check_atapi_dma,
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 37d737b442b..983bff5c4de 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -167,7 +167,6 @@ static struct scsi_host_template pdc_ata_sht = {
 };
 
 static const struct ata_port_operations pdc_sata_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= pdc_tf_load_mmio,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
@@ -193,7 +192,6 @@ static const struct ata_port_operations pdc_sata_ops = {
 
 /* First-generation chips need a more restrictive ->check_atapi_dma op */
 static const struct ata_port_operations pdc_old_sata_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= pdc_tf_load_mmio,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
@@ -218,7 +216,6 @@ static const struct ata_port_operations pdc_old_sata_ops = {
 };
 
 static const struct ata_port_operations pdc_pata_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= pdc_tf_load_mmio,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 5a60ab72ecb..10bf52ca1e1 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -145,7 +145,6 @@ static struct scsi_host_template qs_ata_sht = {
 };
 
 static const struct ata_port_operations qs_ata_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index 1930e7cf143..df0ac77fcdd 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -186,7 +186,6 @@ static struct scsi_host_template sil_sht = {
 };
 
 static const struct ata_port_operations sil_ops = {
-	.port_disable		= ata_port_disable,
 	.dev_config		= sil_dev_config,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 961b3f201a3..e0cd31aa800 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -384,8 +384,6 @@ static struct scsi_host_template sil24_sht = {
 };
 
 static const struct ata_port_operations sil24_ops = {
-	.port_disable		= ata_port_disable,
-
 	.dev_config		= sil24_dev_config,
 
 	.check_status		= sil24_check_status,
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index 691017eddbb..8d98a9fb0a4 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -104,7 +104,6 @@ static struct scsi_host_template sis_sht = {
 };
 
 static const struct ata_port_operations sis_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index 006a720da40..822cabfec95 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -329,7 +329,6 @@ static struct scsi_host_template k2_sata_sht = {
 
 
 static const struct ata_port_operations k2_sata_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= k2_sata_tf_load,
 	.tf_read		= k2_sata_tf_read,
 	.check_status		= k2_stat_check_status,
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index d5cbd16629a..b425061dbe8 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -254,7 +254,6 @@ static struct scsi_host_template pdc_sata_sht = {
 };
 
 static const struct ata_port_operations pdc_20621_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= pdc_tf_load_mmio,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index d4514e2149b..6c53a790805 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -94,8 +94,6 @@ static struct scsi_host_template uli_sht = {
 };
 
 static const struct ata_port_operations uli_ops = {
-	.port_disable		= ata_port_disable,
-
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 4b25c3ef986..25162ec9938 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -122,8 +122,6 @@ static struct scsi_host_template svia_sht = {
 };
 
 static const struct ata_port_operations vt6420_sata_ops = {
-	.port_disable		= ata_port_disable,
-
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
@@ -151,8 +149,6 @@ static const struct ata_port_operations vt6420_sata_ops = {
 };
 
 static const struct ata_port_operations vt6421_pata_ops = {
-	.port_disable		= ata_port_disable,
-
 	.set_piomode		= vt6421_set_pio_mode,
 	.set_dmamode		= vt6421_set_dma_mode,
 
@@ -184,8 +180,6 @@ static const struct ata_port_operations vt6421_pata_ops = {
 };
 
 static const struct ata_port_operations vt6421_sata_ops = {
-	.port_disable		= ata_port_disable,
-
 	.tf_load		= ata_tf_load,
 	.tf_read		= ata_tf_read,
 	.check_status		= ata_check_status,
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index 55fb2e0b369..b1777c3f6d5 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -317,7 +317,6 @@ static struct scsi_host_template vsc_sata_sht = {
 
 
 static const struct ata_port_operations vsc_sata_ops = {
-	.port_disable		= ata_port_disable,
 	.tf_load		= vsc_sata_tf_load,
 	.tf_read		= vsc_sata_tf_read,
 	.exec_command		= ata_exec_command,
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 9350fbf39f7..b41dfb53902 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -4981,7 +4981,7 @@ static void ipr_ata_phy_reset(struct ata_port *ap)
 	rc = ipr_device_reset(ioa_cfg, res);
 
 	if (rc) {
-		ap->ops->port_disable(ap);
+		ata_port_disable(ap);
 		goto out_unlock;
 	}
 
@@ -4996,7 +4996,7 @@ static void ipr_ata_phy_reset(struct ata_port *ap)
 		break;
 	default:
 		ap->link.device[0].class = ATA_DEV_UNKNOWN;
-		ap->ops->port_disable(ap);
+		ata_port_disable(ap);
 		break;
 	};
 
@@ -5262,7 +5262,6 @@ static u8 ipr_ata_check_altstatus(struct ata_port *ap)
 }
 
 static struct ata_port_operations ipr_sata_ops = {
-	.port_disable = ata_port_disable,
 	.check_status = ipr_ata_check_status,
 	.check_altstatus = ipr_ata_check_altstatus,
 	.dev_select = ata_noop_dev_select,
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 1d6503d85f0..0829b55c64d 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -350,7 +350,6 @@ static int sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in,
 }
 
 static struct ata_port_operations sas_sata_ops = {
-	.port_disable		= ata_port_disable,
 	.check_status		= sas_ata_check_status,
 	.check_altstatus	= sas_ata_check_status,
 	.dev_select		= ata_noop_dev_select,
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 382898ef654..e7d163edb4c 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -600,8 +600,6 @@ struct ata_port {
 };
 
 struct ata_port_operations {
-	void (*port_disable) (struct ata_port *);
-
 	void (*dev_config) (struct ata_device *);
 
 	void (*set_piomode) (struct ata_port *, struct ata_device *);
-- 
cgit v1.2.3-70-g09d2


From 81ad1837b590775336f68eafcae8dab13a975b3a Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 22 Aug 2007 22:55:41 +0100
Subject: libata: Switch most of the remaining SFF drivers to
 ata_sff_port_start

This avoids allocating DMA buffers if not needed but at the moment is
mostly just a neatness item.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_generic.c       |  2 +-
 drivers/ata/pata_ali.c          |  8 ++++----
 drivers/ata/pata_amd.c          | 12 ++++++------
 drivers/ata/pata_artop.c        |  4 ++--
 drivers/ata/pata_atiixp.c       |  2 +-
 drivers/ata/pata_cmd640.c       |  2 +-
 drivers/ata/pata_cs5520.c       |  2 +-
 drivers/ata/pata_cs5530.c       |  2 +-
 drivers/ata/pata_cs5535.c       |  2 +-
 drivers/ata/pata_cypress.c      |  2 +-
 drivers/ata/pata_efar.c         |  2 +-
 drivers/ata/pata_hpt366.c       |  2 +-
 drivers/ata/pata_hpt37x.c       |  8 ++++----
 drivers/ata/pata_hpt3x2n.c      |  2 +-
 drivers/ata/pata_hpt3x3.c       |  2 +-
 drivers/ata/pata_isapnp.c       |  2 +-
 drivers/ata/pata_it8213.c       |  2 +-
 drivers/ata/pata_it821x.c       |  2 +-
 drivers/ata/pata_marvell.c      |  2 +-
 drivers/ata/pata_mpiix.c        |  2 +-
 drivers/ata/pata_netcell.c      |  2 +-
 drivers/ata/pata_ns87410.c      |  2 +-
 drivers/ata/pata_oldpiix.c      |  2 +-
 drivers/ata/pata_opti.c         |  2 +-
 drivers/ata/pata_optidma.c      |  4 ++--
 drivers/ata/pata_pdc2027x.c     |  4 ++--
 drivers/ata/pata_pdc202xx_old.c |  4 ++--
 drivers/ata/pata_qdi.c          |  4 ++--
 drivers/ata/pata_radisys.c      |  2 +-
 drivers/ata/pata_rz1000.c       |  2 +-
 drivers/ata/pata_sc1200.c       |  2 +-
 drivers/ata/pata_serverworks.c  |  4 ++--
 drivers/ata/pata_sil680.c       |  2 +-
 drivers/ata/pata_sis.c          | 12 ++++++------
 drivers/ata/pata_sl82c105.c     |  2 +-
 drivers/ata/pata_triflex.c      |  2 +-
 drivers/ata/pata_via.c          |  4 ++--
 drivers/ata/pata_winbond.c      |  2 +-
 38 files changed, 61 insertions(+), 61 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index afe71a6e0da..90329982bef 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -121,7 +121,7 @@ static struct ata_port_operations generic_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int all_generic_ide;		/* Set to claim all devices */
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 7fc11ef0fd2..364534e7aff 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -327,7 +327,7 @@ static struct ata_port_operations ali_early_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /*
@@ -366,7 +366,7 @@ static struct ata_port_operations ali_20_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /*
@@ -403,7 +403,7 @@ static struct ata_port_operations ali_c2_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /*
@@ -439,7 +439,7 @@ static struct ata_port_operations ali_c5_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index b1db7ff8edd..c5779ad4abc 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -361,7 +361,7 @@ static struct ata_port_operations amd33_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations amd66_port_ops = {
@@ -394,7 +394,7 @@ static struct ata_port_operations amd66_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations amd100_port_ops = {
@@ -427,7 +427,7 @@ static struct ata_port_operations amd100_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations amd133_port_ops = {
@@ -460,7 +460,7 @@ static struct ata_port_operations amd133_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations nv100_port_ops = {
@@ -493,7 +493,7 @@ static struct ata_port_operations nv100_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations nv133_port_ops = {
@@ -526,7 +526,7 @@ static struct ata_port_operations nv133_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
index 1827843cda4..d4218310327 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -361,7 +361,7 @@ static const struct ata_port_operations artop6210_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static const struct ata_port_operations artop6260_ops = {
@@ -392,7 +392,7 @@ static const struct ata_port_operations artop6260_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index 0077ee783d1..95ed3071a0a 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -262,7 +262,7 @@ static struct ata_port_operations atiixp_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_cmd640.c b/drivers/ata/pata_cmd640.c
index f09d4fa275c..43d198f9096 100644
--- a/drivers/ata/pata_cmd640.c
+++ b/drivers/ata/pata_cmd640.c
@@ -153,7 +153,7 @@ static int cmd640_port_start(struct ata_port *ap)
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	struct cmd640_reg *timing;
 
-	int ret = ata_port_start(ap);
+	int ret = ata_sff_port_start(ap);
 	if (ret < 0)
 		return ret;
 
diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index fe37e3e80f2..1ae6b6bd856 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -184,7 +184,7 @@ static struct ata_port_operations cs5520_port_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index adeb3acf84c..57e827e4109 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -209,7 +209,7 @@ static struct ata_port_operations cs5530_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static const struct dmi_system_id palmax_dmi_table[] = {
diff --git a/drivers/ata/pata_cs5535.c b/drivers/ata/pata_cs5535.c
index 2c73807da62..3578593a882 100644
--- a/drivers/ata/pata_cs5535.c
+++ b/drivers/ata/pata_cs5535.c
@@ -206,7 +206,7 @@ static struct ata_port_operations cs5535_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_cypress.c b/drivers/ata/pata_cypress.c
index cae44250d81..fc5f9c4e5d8 100644
--- a/drivers/ata/pata_cypress.c
+++ b/drivers/ata/pata_cypress.c
@@ -158,7 +158,7 @@ static struct ata_port_operations cy82c693_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_efar.c b/drivers/ata/pata_efar.c
index cc418e34e63..043dcd35106 100644
--- a/drivers/ata/pata_efar.c
+++ b/drivers/ata/pata_efar.c
@@ -279,7 +279,7 @@ static const struct ata_port_operations efar_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 
diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index 16cc143460e..0713872cf65 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -342,7 +342,7 @@ static struct ata_port_operations hpt366_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index 65c0cb21f6a..e61cb1fd57b 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -673,7 +673,7 @@ static struct ata_port_operations hpt370_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /*
@@ -710,7 +710,7 @@ static struct ata_port_operations hpt370a_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /*
@@ -748,7 +748,7 @@ static struct ata_port_operations hpt372_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /*
@@ -786,7 +786,7 @@ static struct ata_port_operations hpt374_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index 5559da7f9db..9f1c084f846 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -391,7 +391,7 @@ static struct ata_port_operations hpt3x2n_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_hpt3x3.c b/drivers/ata/pata_hpt3x3.c
index 752394b7265..188d2176ec3 100644
--- a/drivers/ata/pata_hpt3x3.c
+++ b/drivers/ata/pata_hpt3x3.c
@@ -153,7 +153,7 @@ static struct ata_port_operations hpt3x3_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
index 1def8c05f34..8ac1e8beaba 100644
--- a/drivers/ata/pata_isapnp.c
+++ b/drivers/ata/pata_isapnp.c
@@ -58,7 +58,7 @@ static struct ata_port_operations isapnp_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_it8213.c b/drivers/ata/pata_it8213.c
index cc989ef3042..1eda821e5e3 100644
--- a/drivers/ata/pata_it8213.c
+++ b/drivers/ata/pata_it8213.c
@@ -289,7 +289,7 @@ static const struct ata_port_operations it8213_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 4188898a66a..988ef736b93 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -563,7 +563,7 @@ static int it821x_port_start(struct ata_port *ap)
 	struct it821x_dev *itdev;
 	u8 conf;
 
-	int ret = ata_port_start(ap);
+	int ret = ata_sff_port_start(ap);
 	if (ret < 0)
 		return ret;
 
diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
index 99d0844c8cb..9afc8a32b22 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -139,7 +139,7 @@ static const struct ata_port_operations marvell_ops = {
 	.irq_on			= ata_irq_on,
 
 	/* Generic PATA PCI ATA helpers */
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 
diff --git a/drivers/ata/pata_mpiix.c b/drivers/ata/pata_mpiix.c
index b50910938e6..cb78b7bfe14 100644
--- a/drivers/ata/pata_mpiix.c
+++ b/drivers/ata/pata_mpiix.c
@@ -190,7 +190,7 @@ static struct ata_port_operations mpiix_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int mpiix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_netcell.c b/drivers/ata/pata_netcell.c
index b2c3d076754..25c922abd55 100644
--- a/drivers/ata/pata_netcell.c
+++ b/drivers/ata/pata_netcell.c
@@ -68,7 +68,7 @@ static const struct ata_port_operations netcell_ops = {
 	.irq_on			= ata_irq_on,
 
 	/* Generic PATA PCI ATA helpers */
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 
diff --git a/drivers/ata/pata_ns87410.c b/drivers/ata/pata_ns87410.c
index 4b0ddf6ba3b..6e8e55745b7 100644
--- a/drivers/ata/pata_ns87410.c
+++ b/drivers/ata/pata_ns87410.c
@@ -185,7 +185,7 @@ static struct ata_port_operations ns87410_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_oldpiix.c b/drivers/ata/pata_oldpiix.c
index ada719ad45a..3cd5eb2b6c9 100644
--- a/drivers/ata/pata_oldpiix.c
+++ b/drivers/ata/pata_oldpiix.c
@@ -266,7 +266,7 @@ static const struct ata_port_operations oldpiix_pata_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 
diff --git a/drivers/ata/pata_opti.c b/drivers/ata/pata_opti.c
index 2a4bfbfbe75..8f79447b615 100644
--- a/drivers/ata/pata_opti.c
+++ b/drivers/ata/pata_opti.c
@@ -210,7 +210,7 @@ static struct ata_port_operations opti_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int opti_init_one(struct pci_dev *dev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_optidma.c b/drivers/ata/pata_optidma.c
index 848ae16f239..6b07b5b4853 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -398,7 +398,7 @@ static struct ata_port_operations optidma_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations optiplus_port_ops = {
@@ -432,7 +432,7 @@ static struct ata_port_operations optiplus_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 5fba36f04ca..40b070ea85a 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -173,7 +173,7 @@ static struct ata_port_operations pdc2027x_pata100_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static struct ata_port_operations pdc2027x_pata133_ops = {
@@ -206,7 +206,7 @@ static struct ata_port_operations pdc2027x_pata133_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static struct ata_port_info pdc2027x_port_info[] = {
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index 9b7077d5148..fd4350029bc 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -275,7 +275,7 @@ static struct ata_port_operations pdc2024x_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations pdc2026x_port_ops = {
@@ -308,7 +308,7 @@ static struct ata_port_operations pdc2026x_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index da9ccd23ffc..032fa67acc8 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -192,7 +192,7 @@ static struct ata_port_operations qdi6500_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations qdi6580_port_ops = {
@@ -218,7 +218,7 @@ static struct ata_port_operations qdi6580_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_radisys.c b/drivers/ata/pata_radisys.c
index ece2190971c..d5b76497f4a 100644
--- a/drivers/ata/pata_radisys.c
+++ b/drivers/ata/pata_radisys.c
@@ -231,7 +231,7 @@ static const struct ata_port_operations radisys_pata_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index 5f1a4e180dc..ba8a31c55ed 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -99,7 +99,7 @@ static struct ata_port_operations rz1000_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int rz1000_fifo_disable(struct pci_dev *pdev)
diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c
index 6c13754c75a..21ebc485ca4 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -227,7 +227,7 @@ static struct ata_port_operations sc1200_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_serverworks.c b/drivers/ata/pata_serverworks.c
index 7c08f25c954..df68806df4b 100644
--- a/drivers/ata/pata_serverworks.c
+++ b/drivers/ata/pata_serverworks.c
@@ -348,7 +348,7 @@ static struct ata_port_operations serverworks_osb4_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations serverworks_csb_port_ops = {
@@ -382,7 +382,7 @@ static struct ata_port_operations serverworks_csb_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int serverworks_fixup_osb4(struct pci_dev *pdev)
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index 71f206d7b5c..2eb75cd74a9 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -267,7 +267,7 @@ static struct ata_port_operations sil680_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 4ccf09dac8c..3b5be77e861 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -559,7 +559,7 @@ static const struct ata_port_operations sis_133_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static const struct ata_port_operations sis_133_for_sata_ops = {
@@ -591,7 +591,7 @@ static const struct ata_port_operations sis_133_for_sata_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static const struct ata_port_operations sis_133_early_ops = {
@@ -623,7 +623,7 @@ static const struct ata_port_operations sis_133_early_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static const struct ata_port_operations sis_100_ops = {
@@ -655,7 +655,7 @@ static const struct ata_port_operations sis_100_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static const struct ata_port_operations sis_66_ops = {
@@ -687,7 +687,7 @@ static const struct ata_port_operations sis_66_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static const struct ata_port_operations sis_old_ops = {
@@ -719,7 +719,7 @@ static const struct ata_port_operations sis_old_ops = {
 	.irq_clear		= ata_bmdma_irq_clear,
 	.irq_on			= ata_irq_on,
 
-	.port_start		= ata_port_start,
+	.port_start		= ata_sff_port_start,
 };
 
 static const struct ata_port_info sis_info = {
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index 5bd78437e94..1388cef52c0 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -254,7 +254,7 @@ static struct ata_port_operations sl82c105_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_triflex.c b/drivers/ata/pata_triflex.c
index dc20b179e3b..403eafcffe1 100644
--- a/drivers/ata/pata_triflex.c
+++ b/drivers/ata/pata_triflex.c
@@ -227,7 +227,7 @@ static struct ata_port_operations triflex_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index e1f20e73a61..5d41b6612d7 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -378,7 +378,7 @@ static struct ata_port_operations via_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 static struct ata_port_operations via_port_ops_noirq = {
@@ -412,7 +412,7 @@ static struct ata_port_operations via_port_ops_noirq = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
diff --git a/drivers/ata/pata_winbond.c b/drivers/ata/pata_winbond.c
index d7555f775d5..553658bacce 100644
--- a/drivers/ata/pata_winbond.c
+++ b/drivers/ata/pata_winbond.c
@@ -160,7 +160,7 @@ static struct ata_port_operations winbond_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 	.irq_on		= ata_irq_on,
 
-	.port_start	= ata_port_start,
+	.port_start	= ata_sff_port_start,
 };
 
 /**
-- 
cgit v1.2.3-70-g09d2


From 614fe29bd91f99cc1c1fbf3274fa918691044f47 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 22 Aug 2007 23:22:45 +0100
Subject: libata: Spot bridge chips

If we have a PATA cable with a SATA drive on it then we've found a
bridge and we can flip the cable type. This fixes some cable detect
problems with SATA bridges on chipsets and misdetected cable types.

In theory cable detection and mode limiting is needed if you put a
SATA/PATA bridge on a 40 wire cable, but I see no way to deal with
that other than to point out its not a good idea anyway.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 43c329544c0..b81265d1e46 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2183,6 +2183,17 @@ int ata_bus_probe(struct ata_port *ap)
 	if (ap->ops->cable_detect)
 		ap->cbl = ap->ops->cable_detect(ap);
 
+	/* We may have SATA bridge glue hiding here irrespective of the
+	   reported cable types and sensed types */
+	ata_link_for_each_dev(dev, &ap->link) {
+		if (!ata_dev_enabled(dev))
+			continue;
+		/* SATA drives indicate we have a bridge. We don't know which
+		   end of the link the bridge is which is a problem */
+		if (ata_id_is_sata(dev->id))
+			ap->cbl = ATA_CBL_SATA;
+	}
+
 	/* After the identify sequence we can now set up the devices. We do
 	   this in the normal order so that the user doesn't get confused */
 
-- 
cgit v1.2.3-70-g09d2


From e923090ddd9fef1d4e06dc6c5295e29baced19f3 Mon Sep 17 00:00:00 2001
From: Albert Lee <albertcc@tw.ibm.com>
Date: Mon, 20 Aug 2007 16:56:29 +0800
Subject: libata: pata_pdc2027x PLL detection minor cleanup

Minor cleanup to remove the unneeded rmb()s per Jeff's advice. Also removed the
pll_clock < 0 check since pll_clock now guaranteed to be >= 0 after Mikael's patch.

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_pdc2027x.c | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 40b070ea85a..2141a99e4da 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -561,12 +561,10 @@ static long pdc_read_counter(struct ata_host *host)
 retry:
 	bccrl = readl(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
 	bccrh = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
-	rmb();
 
 	/* Read the counter values again for verification */
 	bccrlv = readl(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
 	bccrhv = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
-	rmb();
 
 	counter = (bccrh << 15) | bccrl;
 
@@ -741,9 +739,6 @@ static int pdc_hardware_init(struct ata_host *host, unsigned int board_idx)
 	 */
 	pll_clock = pdc_detect_pll_input_clock(host);
 
-	if (pll_clock < 0) /* counter overflow? Try again. */
-		pll_clock = pdc_detect_pll_input_clock(host);
-
 	dev_printk(KERN_INFO, host->dev, "PLL input clock %ld kHz\n", pll_clock/1000);
 
 	/* Adjust PLL control register */
-- 
cgit v1.2.3-70-g09d2


From cbcdd87593a1d85c5c4b259945a3a09eee12814d Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sat, 18 Aug 2007 13:14:55 +0900
Subject: libata: implement and use ata_port_desc() to report port
 configuration

Currently, port configuration reporting has the following problems.

* iomapped address is reported instead of raw address
* report contains irrelevant fields or lacks necessary fields for
  non-SFF controllers.
* host->irq/irq2 are there just for reporting and hacky.

This patch implements and uses ata_port_desc() and
ata_port_pbar_desc().  ata_port_desc() is almost identical to
ata_ehi_push_desc() except that it takes @ap instead of @ehi, has no
locking requirement, can only be used during host initialization and "
" is used as separator instead of ", ".  ata_port_pbar_desc() is a
helper to ease reporting of a PCI BAR or an offsetted address into it.

LLD pushes whatever description it wants using the above two
functions.  The accumulated description is printed on host
registration after "[S/P]ATA max MAX_XFERMODE ".

SFF init helpers and ata_host_activate() automatically add
descriptions for addresses and irq respectively, so only LLDs which
isn't standard SFF need to add custom descriptions.  In many cases,
such controllers need to report different things anyway.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c           |  4 +++
 drivers/ata/libata-core.c    | 27 ++++++++----------
 drivers/ata/libata-eh.c      | 67 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/ata/libata-sff.c     | 23 +++++++++++----
 drivers/ata/pata_cs5520.c    | 23 +++++++++------
 drivers/ata/pata_hpt3x3.c    |  6 +++-
 drivers/ata/pata_icside.c    | 19 +++++++++++--
 drivers/ata/pata_isapnp.c    |  4 +++
 drivers/ata/pata_ixp4xx_cf.c | 13 +++++++--
 drivers/ata/pata_legacy.c    |  2 ++
 drivers/ata/pata_mpc52xx.c   |  7 +++--
 drivers/ata/pata_mpiix.c     | 16 +++++++----
 drivers/ata/pata_pcmcia.c    |  2 ++
 drivers/ata/pata_pdc2027x.c  | 17 +++++++----
 drivers/ata/pata_platform.c  |  4 +++
 drivers/ata/pata_qdi.c       |  5 +++-
 drivers/ata/pata_scc.c       |  3 ++
 drivers/ata/pata_winbond.c   |  7 +++--
 drivers/ata/pdc_adma.c       | 13 +++++++--
 drivers/ata/sata_inic162x.c  | 14 +++++++--
 drivers/ata/sata_mv.c        |  8 +++++-
 drivers/ata/sata_promise.c   | 11 ++++++--
 drivers/ata/sata_qstor.c     | 11 ++++++--
 drivers/ata/sata_sil.c       |  6 +++-
 drivers/ata/sata_sil24.c     |  7 +++--
 drivers/ata/sata_svw.c       | 12 ++++++--
 drivers/ata/sata_sx4.c       | 19 ++++++++-----
 drivers/ata/sata_uli.c       | 13 +++++++++
 drivers/ata/sata_via.c       |  3 ++
 drivers/ata/sata_vsc.c       | 12 ++++++--
 include/linux/libata.h       | 12 ++++++--
 31 files changed, 309 insertions(+), 81 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 0d80189d03f..518c5183035 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1887,6 +1887,10 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		struct ata_port *ap = host->ports[i];
 		void __iomem *port_mmio = ahci_port_base(ap);
 
+		ata_port_pbar_desc(ap, AHCI_PCI_BAR, -1, "abar");
+		ata_port_pbar_desc(ap, AHCI_PCI_BAR,
+				   0x100 + ap->port_no * 0x80, "port");
+
 		/* standard SATA port setup */
 		if (hpriv->port_map & (1 << i))
 			ap->ioaddr.cmd_addr = port_mmio;
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b81265d1e46..84d81b26e38 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6541,7 +6541,6 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 	/* set cable, sata_spd_limit and report */
 	for (i = 0; i < host->n_ports; i++) {
 		struct ata_port *ap = host->ports[i];
-		int irq_line;
 		unsigned long xfer_mask;
 
 		/* set SATA cable type if still unset */
@@ -6551,24 +6550,16 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 		/* init sata_spd_limit to the current value */
 		sata_link_init_spd(&ap->link);
 
-		/* report the secondary IRQ for second channel legacy */
-		irq_line = host->irq;
-		if (i == 1 && host->irq2)
-			irq_line = host->irq2;
-
+		/* print per-port info to dmesg */
 		xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
 					      ap->udma_mask);
 
-		/* print per-port info to dmesg */
 		if (!ata_port_is_dummy(ap))
-			ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p "
-					"ctl 0x%p bmdma 0x%p irq %d\n",
+			ata_port_printk(ap, KERN_INFO,
+					"%cATA max %s %s\n",
 					(ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
 					ata_mode_string(xfer_mask),
-					ap->ioaddr.cmd_addr,
-					ap->ioaddr.ctl_addr,
-					ap->ioaddr.bmdma_addr,
-					irq_line);
+					ap->link.eh_info.desc);
 		else
 			ata_port_printk(ap, KERN_INFO, "DUMMY\n");
 	}
@@ -6652,7 +6643,7 @@ int ata_host_activate(struct ata_host *host, int irq,
 		      irq_handler_t irq_handler, unsigned long irq_flags,
 		      struct scsi_host_template *sht)
 {
-	int rc;
+	int i, rc;
 
 	rc = ata_host_start(host);
 	if (rc)
@@ -6663,8 +6654,8 @@ int ata_host_activate(struct ata_host *host, int irq,
 	if (rc)
 		return rc;
 
-	/* Used to print device info at probe */
-	host->irq = irq;
+	for (i = 0; i < host->n_ports; i++)
+		ata_port_desc(host->ports[i], "irq %d", irq);
 
 	rc = ata_host_register(host, sht);
 	/* if failed, just free the IRQ and leave ports alone */
@@ -7136,6 +7127,10 @@ EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
+EXPORT_SYMBOL_GPL(ata_port_desc);
+#ifdef CONFIG_PCI
+EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
+#endif /* CONFIG_PCI */
 EXPORT_SYMBOL_GPL(ata_eng_timeout);
 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
 EXPORT_SYMBOL_GPL(ata_link_abort);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 2ddc2ed9c29..8219e2d7104 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -151,6 +151,73 @@ void ata_ehi_clear_desc(struct ata_eh_info *ehi)
 	ehi->desc_len = 0;
 }
 
+/**
+ *	ata_port_desc - append port description
+ *	@ap: target ATA port
+ *	@fmt: printf format string
+ *
+ *	Format string according to @fmt and append it to port
+ *	description.  If port description is not empty, " " is added
+ *	in-between.  This function is to be used while initializing
+ *	ata_host.  The description is printed on host registration.
+ *
+ *	LOCKING:
+ *	None.
+ */
+void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
+{
+	va_list args;
+
+	WARN_ON(!(ap->pflags & ATA_PFLAG_INITIALIZING));
+
+	if (ap->link.eh_info.desc_len)
+		__ata_ehi_push_desc(&ap->link.eh_info, " ");
+
+	va_start(args, fmt);
+	__ata_ehi_pushv_desc(&ap->link.eh_info, fmt, args);
+	va_end(args);
+}
+
+#ifdef CONFIG_PCI
+
+/**
+ *	ata_port_pbar_desc - append PCI BAR description
+ *	@ap: target ATA port
+ *	@bar: target PCI BAR
+ *	@offset: offset into PCI BAR
+ *	@name: name of the area
+ *
+ *	If @offset is negative, this function formats a string which
+ *	contains the name, address, size and type of the BAR and
+ *	appends it to the port description.  If @offset is zero or
+ *	positive, only name and offsetted address is appended.
+ *
+ *	LOCKING:
+ *	None.
+ */
+void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
+			const char *name)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	char *type = "";
+	unsigned long long start, len;
+
+	if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM)
+		type = "m";
+	else if (pci_resource_flags(pdev, bar) & IORESOURCE_IO)
+		type = "i";
+
+	start = (unsigned long long)pci_resource_start(pdev, bar);
+	len = (unsigned long long)pci_resource_len(pdev, bar);
+
+	if (offset < 0)
+		ata_port_desc(ap, "%s %s%llu@0x%llx", name, type, len, start);
+	else
+		ata_port_desc(ap, "%s 0x%llx", name, start + offset);
+}
+
+#endif /* CONFIG_PCI */
+
 static void ata_ering_record(struct ata_ering *ering, int is_io,
 			     unsigned int err_mask)
 {
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index ccef99a0337..026439e05af 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -567,6 +567,9 @@ int ata_pci_init_bmdma(struct ata_host *host)
 		if ((!(ap->flags & ATA_FLAG_IGN_SIMPLEX)) &&
 		    (ioread8(bmdma + 2) & 0x80))
 			host->flags |= ATA_HOST_SIMPLEX;
+
+		ata_port_desc(ap, "bmdma 0x%llx",
+			(unsigned long long)pci_resource_start(pdev, 4) + 8 * i);
 	}
 
 	return 0;
@@ -634,6 +637,10 @@ int ata_pci_init_sff_host(struct ata_host *host)
 			((unsigned long)iomap[base + 1] | ATA_PCI_CTL_OFS);
 		ata_std_ports(&ap->ioaddr);
 
+		ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
+			(unsigned long long)pci_resource_start(pdev, base),
+			(unsigned long long)pci_resource_start(pdev, base + 1));
+
 		mask |= 1 << i;
 	}
 
@@ -804,24 +811,30 @@ int ata_pci_init_one(struct pci_dev *pdev,
 				      IRQF_SHARED, DRV_NAME, host);
 		if (rc)
 			goto err_out;
-		host->irq = pdev->irq;
+
+		ata_port_desc(host->ports[0], "irq %d", pdev->irq);
+		ata_port_desc(host->ports[1], "irq %d", pdev->irq);
 	} else {
 		if (!ata_port_is_dummy(host->ports[0])) {
-			host->irq = ATA_PRIMARY_IRQ(pdev);
-			rc = devm_request_irq(dev, host->irq,
+			rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev),
 					      pi->port_ops->irq_handler,
 					      IRQF_SHARED, DRV_NAME, host);
 			if (rc)
 				goto err_out;
+
+			ata_port_desc(host->ports[0], "irq %d",
+				      ATA_PRIMARY_IRQ(pdev));
 		}
 
 		if (!ata_port_is_dummy(host->ports[1])) {
-			host->irq2 = ATA_SECONDARY_IRQ(pdev);
-			rc = devm_request_irq(dev, host->irq2,
+			rc = devm_request_irq(dev, ATA_SECONDARY_IRQ(pdev),
 					      pi->port_ops->irq_handler,
 					      IRQF_SHARED, DRV_NAME, host);
 			if (rc)
 				goto err_out;
+
+			ata_port_desc(host->ports[1], "irq %d",
+				      ATA_SECONDARY_IRQ(pdev));
 		}
 	}
 
diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index 1ae6b6bd856..ff1eb84c7d2 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -189,6 +189,8 @@ static struct ata_port_operations cs5520_port_ops = {
 
 static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
+	static const unsigned int cmd_port[] = { 0x1F0, 0x170 };
+	static const unsigned int ctl_port[] = { 0x3F6, 0x376 };
 	struct ata_port_info pi = {
 		.flags		= ATA_FLAG_SLAVE_POSS,
 		.pio_mask	= 0x1f,
@@ -242,10 +244,10 @@ static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_devi
 	}
 
 	/* Map IO ports and initialize host accordingly */
-	iomap[0] = devm_ioport_map(&pdev->dev, 0x1F0, 8);
-	iomap[1] = devm_ioport_map(&pdev->dev, 0x3F6, 1);
-	iomap[2] = devm_ioport_map(&pdev->dev, 0x170, 8);
-	iomap[3] = devm_ioport_map(&pdev->dev, 0x376, 1);
+	iomap[0] = devm_ioport_map(&pdev->dev, cmd_port[0], 8);
+	iomap[1] = devm_ioport_map(&pdev->dev, ctl_port[0], 1);
+	iomap[2] = devm_ioport_map(&pdev->dev, cmd_port[1], 8);
+	iomap[3] = devm_ioport_map(&pdev->dev, ctl_port[1], 1);
 	iomap[4] = pcim_iomap(pdev, 2, 0);
 
 	if (!iomap[0] || !iomap[1] || !iomap[2] || !iomap[3] || !iomap[4])
@@ -258,6 +260,10 @@ static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_devi
 	ioaddr->bmdma_addr = iomap[4];
 	ata_std_ports(ioaddr);
 
+	ata_port_desc(host->ports[0],
+		      "cmd 0x%x ctl 0x%x", cmd_port[0], ctl_port[0]);
+	ata_port_pbar_desc(host->ports[0], 4, 0, "bmdma");
+
 	ioaddr = &host->ports[1]->ioaddr;
 	ioaddr->cmd_addr = iomap[2];
 	ioaddr->ctl_addr = iomap[3];
@@ -265,6 +271,10 @@ static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_devi
 	ioaddr->bmdma_addr = iomap[4] + 8;
 	ata_std_ports(ioaddr);
 
+	ata_port_desc(host->ports[1],
+		      "cmd 0x%x ctl 0x%x", cmd_port[1], ctl_port[1]);
+	ata_port_pbar_desc(host->ports[1], 4, 8, "bmdma");
+
 	/* activate the host */
 	pci_set_master(pdev);
 	rc = ata_host_start(host);
@@ -283,10 +293,7 @@ static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_devi
 		if (rc)
 			return rc;
 
-		if (i == 0)
-			host->irq = irq[0];
-		else
-			host->irq2 = irq[1];
+		ata_port_desc(ap, "irq %d", irq[i]);
 	}
 
 	return ata_host_register(host, &cs5520_sht);
diff --git a/drivers/ata/pata_hpt3x3.c b/drivers/ata/pata_hpt3x3.c
index 188d2176ec3..cb8bdb6887d 100644
--- a/drivers/ata/pata_hpt3x3.c
+++ b/drivers/ata/pata_hpt3x3.c
@@ -237,7 +237,8 @@ static int hpt3x3_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	base = host->iomap[4];	/* Bus mastering base */
 
 	for (i = 0; i < host->n_ports; i++) {
-		struct ata_ioports *ioaddr = &host->ports[i]->ioaddr;
+		struct ata_port *ap = host->ports[i];
+		struct ata_ioports *ioaddr = &ap->ioaddr;
 
 		ioaddr->cmd_addr = base + offset_cmd[i];
 		ioaddr->altstatus_addr =
@@ -245,6 +246,9 @@ static int hpt3x3_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 		ioaddr->scr_addr = NULL;
 		ata_std_ports(ioaddr);
 		ioaddr->bmdma_addr = base + 8 * i;
+
+		ata_port_pbar_desc(ap, 4, -1, "ioport");
+		ata_port_pbar_desc(ap, 4, offset_cmd[i], "cmd");
 	}
 	pci_set_master(pdev);
 	return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
diff --git a/drivers/ata/pata_icside.c b/drivers/ata/pata_icside.c
index 4a69328a4c4..be30923566c 100644
--- a/drivers/ata/pata_icside.c
+++ b/drivers/ata/pata_icside.c
@@ -70,6 +70,8 @@ struct pata_icside_info {
 	unsigned int		mwdma_mask;
 	unsigned int		nr_ports;
 	const struct portinfo	*port[2];
+	unsigned long		raw_base;
+	unsigned long		raw_ioc_base;
 };
 
 #define ICS_TYPE_A3IN	0
@@ -392,9 +394,10 @@ static struct ata_port_operations pata_icside_port_ops = {
 };
 
 static void __devinit
-pata_icside_setup_ioaddr(struct ata_ioports *ioaddr, void __iomem *base,
+pata_icside_setup_ioaddr(struct ata_port *ap, void __iomem *base,
 			 const struct portinfo *info)
 {
+	struct ata_ioports *ioaddr = &ap->ioaddr;
 	void __iomem *cmd = base + info->dataoffset;
 
 	ioaddr->cmd_addr	= cmd;
@@ -411,6 +414,13 @@ pata_icside_setup_ioaddr(struct ata_ioports *ioaddr, void __iomem *base,
 
 	ioaddr->ctl_addr	= base + info->ctrloffset;
 	ioaddr->altstatus_addr	= ioaddr->ctl_addr;
+
+	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
+		      info->raw_base + info->dataoffset,
+		      info->raw_base + info->ctrloffset);
+
+	if (info->raw_ioc_base)
+		ata_port_desc(ap, "iocbase 0x%lx", info->raw_ioc_base);
 }
 
 static int __devinit pata_icside_register_v5(struct pata_icside_info *info)
@@ -431,6 +441,8 @@ static int __devinit pata_icside_register_v5(struct pata_icside_info *info)
 	info->nr_ports = 1;
 	info->port[0] = &pata_icside_portinfo_v5;
 
+	info->raw_base = ecard_resource_start(ec, ECARD_RES_MEMC);
+
 	return 0;
 }
 
@@ -471,6 +483,9 @@ static int __devinit pata_icside_register_v6(struct pata_icside_info *info)
 	info->port[0] = &pata_icside_portinfo_v6_1;
 	info->port[1] = &pata_icside_portinfo_v6_2;
 
+	info->raw_base = ecard_resource_start(ec, ECARD_RES_EASI);
+	info->raw_ioc_base = ecard_resource_start(ec, ECARD_RES_IOCFAST);
+
 	return icside_dma_init(info);
 }
 
@@ -507,7 +522,7 @@ static int __devinit pata_icside_add_ports(struct pata_icside_info *info)
 		ap->flags |= ATA_FLAG_SLAVE_POSS;
 		ap->ops = &pata_icside_port_ops;
 
-		pata_icside_setup_ioaddr(&ap->ioaddr, info->base, info->port[i]);
+		pata_icside_setup_ioaddr(ap, info->base, info->port[i]);
 	}
 
 	return ata_host_activate(host, ec->irq, ata_interrupt, 0,
diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
index 8ac1e8beaba..88ab0e1d353 100644
--- a/drivers/ata/pata_isapnp.c
+++ b/drivers/ata/pata_isapnp.c
@@ -110,6 +110,10 @@ static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev
 
 	ata_std_ports(&ap->ioaddr);
 
+	ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
+		      (unsigned long long)pnp_port_start(idev, 0),
+		      (unsigned long long)pnp_port_start(idev, 1));
+
 	/* activate */
 	return ata_host_activate(host, pnp_irq(idev, 0), ata_interrupt, 0,
 				 &isapnp_sht);
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 7b0d2fc5748..fcd532afbf2 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -131,8 +131,12 @@ static struct ata_port_operations ixp4xx_port_ops = {
 };
 
 static void ixp4xx_setup_port(struct ata_ioports *ioaddr,
-				struct ixp4xx_pata_data *data)
+			      struct ixp4xx_pata_data *data,
+			      unsigned long raw_cs0, unsigned long raw_cs1)
 {
+	unsigned long raw_cmd = raw_cs0;
+	unsigned long raw_ctl = raw_cs1 + 0x06;
+
 	ioaddr->cmd_addr	= data->cs0;
 	ioaddr->altstatus_addr	= data->cs1 + 0x06;
 	ioaddr->ctl_addr	= data->cs1 + 0x06;
@@ -158,7 +162,12 @@ static void ixp4xx_setup_port(struct ata_ioports *ioaddr,
 	*(unsigned long *)&ioaddr->device_addr		^= 0x03;
 	*(unsigned long *)&ioaddr->status_addr		^= 0x03;
 	*(unsigned long *)&ioaddr->command_addr		^= 0x03;
+
+	raw_cmd ^= 0x03;
+	raw_ctl ^= 0x03;
 #endif
+
+	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", raw_cmd, raw_ctl);
 }
 
 static __devinit int ixp4xx_pata_probe(struct platform_device *pdev)
@@ -203,7 +212,7 @@ static __devinit int ixp4xx_pata_probe(struct platform_device *pdev)
 	ap->pio_mask = 0x1f; /* PIO4 */
 	ap->flags |= ATA_FLAG_MMIO | ATA_FLAG_NO_LEGACY | ATA_FLAG_NO_ATAPI;
 
-	ixp4xx_setup_port(&ap->ioaddr, data);
+	ixp4xx_setup_port(ap, data, cs0->start, cs1->start);
 
 	dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
 
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 6cae26f4d27..7bed8d80638 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -799,6 +799,8 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
 	ata_std_ports(&ap->ioaddr);
 	ap->private_data = ld;
 
+	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", io, ctrl);
+
 	ret = ata_host_activate(host, irq, ata_interrupt, 0, &legacy_sht);
 	if (ret)
 		goto fail;
diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c
index a56694b2833..412140f0285 100644
--- a/drivers/ata/pata_mpc52xx.c
+++ b/drivers/ata/pata_mpc52xx.c
@@ -302,7 +302,8 @@ static struct ata_port_operations mpc52xx_ata_port_ops = {
 };
 
 static int __devinit
-mpc52xx_ata_init_one(struct device *dev, struct mpc52xx_ata_priv *priv)
+mpc52xx_ata_init_one(struct device *dev, struct mpc52xx_ata_priv *priv,
+		     unsigned long raw_ata_regs)
 {
 	struct ata_host *host;
 	struct ata_port *ap;
@@ -336,6 +337,8 @@ mpc52xx_ata_init_one(struct device *dev, struct mpc52xx_ata_priv *priv)
 	aio->status_addr	= &priv->ata_regs->tf_command;
 	aio->command_addr	= &priv->ata_regs->tf_command;
 
+	ata_port_desc(ap, "ata_regs 0x%lx", raw_ata_regs);
+
 	/* activate host */
 	return ata_host_activate(host, priv->ata_irq, ata_interrupt, 0,
 				 &mpc52xx_ata_sht);
@@ -432,7 +435,7 @@ mpc52xx_ata_probe(struct of_device *op, const struct of_device_id *match)
 	}
 
 	/* Register ourselves to libata */
-	rv = mpc52xx_ata_init_one(&op->dev, priv);
+	rv = mpc52xx_ata_init_one(&op->dev, priv, res_mem.start);
 	if (rv) {
 		printk(KERN_ERR DRV_NAME ": "
 			"Error while registering to ATA layer\n");
diff --git a/drivers/ata/pata_mpiix.c b/drivers/ata/pata_mpiix.c
index cb78b7bfe14..d5483087a3f 100644
--- a/drivers/ata/pata_mpiix.c
+++ b/drivers/ata/pata_mpiix.c
@@ -201,7 +201,7 @@ static int mpiix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 	struct ata_port *ap;
 	void __iomem *cmd_addr, *ctl_addr;
 	u16 idetim;
-	int irq;
+	int cmd, ctl, irq;
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
@@ -209,6 +209,7 @@ static int mpiix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 	host = ata_host_alloc(&dev->dev, 1);
 	if (!host)
 		return -ENOMEM;
+	ap = host->ports[0];
 
 	/* MPIIX has many functions which can be turned on or off according
 	   to other devices present. Make sure IDE is enabled before we try
@@ -220,25 +221,28 @@ static int mpiix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 
 	/* See if it's primary or secondary channel... */
 	if (!(idetim & SECONDARY)) {
+		cmd = 0x1F0;
+		ctl = 0x3F6;
 		irq = 14;
-		cmd_addr = devm_ioport_map(&dev->dev, 0x1F0, 8);
-		ctl_addr = devm_ioport_map(&dev->dev, 0x3F6, 1);
 	} else {
+		cmd = 0x170;
+		ctl = 0x376;
 		irq = 15;
-		cmd_addr = devm_ioport_map(&dev->dev, 0x170, 8);
-		ctl_addr = devm_ioport_map(&dev->dev, 0x376, 1);
 	}
 
+	cmd_addr = devm_ioport_map(&dev->dev, cmd, 8);
+	ctl_addr = devm_ioport_map(&dev->dev, ctl, 1);
 	if (!cmd_addr || !ctl_addr)
 		return -ENOMEM;
 
+	ata_port_desc(ap, "cmd 0x%x ctl 0x%x", cmd, ctl);
+
 	/* We do our own plumbing to avoid leaking special cases for whacko
 	   ancient hardware into the core code. There are two issues to
 	   worry about.  #1 The chip is a bridge so if in legacy mode and
 	   without BARs set fools the setup.  #2 If you pci_disable_device
 	   the MPIIX your box goes castors up */
 
-	ap = host->ports[0];
 	ap->ops = &mpiix_port_ops;
 	ap->pio_mask = 0x1F;
 	ap->flags |= ATA_FLAG_SLAVE_POSS;
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index 5baf531f652..782ff4ada9d 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -302,6 +302,8 @@ next_entry:
 	ap->ioaddr.ctl_addr = ctl_addr;
 	ata_std_ports(&ap->ioaddr);
 
+	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", io_base, ctl_base);
+
 	/* activate */
 	ret = ata_host_activate(host, pdev->irq.AssignedIRQ, ata_interrupt,
 				IRQF_SHARED, &pcmcia_sht);
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 2141a99e4da..f87c800be7f 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -782,12 +782,14 @@ static void pdc_ata_setup_port(struct ata_ioports *port, void __iomem *base)
 static int __devinit pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	static int printed_version;
+	static const unsigned long cmd_offset[] = { 0x17c0, 0x15c0 };
+	static const unsigned long bmdma_offset[] = { 0x1000, 0x1008 };
 	unsigned int board_idx = (unsigned int) ent->driver_data;
 	const struct ata_port_info *ppi[] =
 		{ &pdc2027x_port_info[board_idx], NULL };
 	struct ata_host *host;
 	void __iomem *mmio_base;
-	int rc;
+	int i, rc;
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
@@ -817,10 +819,15 @@ static int __devinit pdc2027x_init_one(struct pci_dev *pdev, const struct pci_de
 
 	mmio_base = host->iomap[PDC_MMIO_BAR];
 
-	pdc_ata_setup_port(&host->ports[0]->ioaddr, mmio_base + 0x17c0);
-	host->ports[0]->ioaddr.bmdma_addr = mmio_base + 0x1000;
-	pdc_ata_setup_port(&host->ports[1]->ioaddr, mmio_base + 0x15c0);
-	host->ports[1]->ioaddr.bmdma_addr = mmio_base + 0x1008;
+	for (i = 0; i < 2; i++) {
+		struct ata_port *ap = host->ports[i];
+
+		pdc_ata_setup_port(&ap->ioaddr, mmio_base + cmd_offset[i]);
+		ap->ioaddr.bmdma_addr = mmio_base + bmdma_offset[i];
+
+		ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, PDC_MMIO_BAR, cmd_offset[i], "cmd");
+	}
 
 	//pci_enable_intx(pdev);
 
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index b04ce5f9841..fc72a965643 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -208,6 +208,10 @@ static int __devinit pata_platform_probe(struct platform_device *pdev)
 	pp_info = pdev->dev.platform_data;
 	pata_platform_setup_port(&ap->ioaddr, pp_info);
 
+	ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
+		      (unsigned long long)io_res->start,
+		      (unsigned long long)ctl_res->start);
+
 	/* activate */
 	return ata_host_activate(host, platform_get_irq(pdev, 0),
 				 ata_interrupt, pp_info ? pp_info->irq_flags
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index 032fa67acc8..7d4c696c4cb 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -234,6 +234,7 @@ static struct ata_port_operations qdi6580_port_ops = {
 
 static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
 {
+	unsigned long ctl = io + 0x206;
 	struct platform_device *pdev;
 	struct ata_host *host;
 	struct ata_port *ap;
@@ -250,7 +251,7 @@ static __init int qdi_init_one(unsigned long port, int type, unsigned long io, i
 
 	ret = -ENOMEM;
 	io_addr = devm_ioport_map(&pdev->dev, io, 8);
-	ctl_addr = devm_ioport_map(&pdev->dev, io + 0x206, 1);
+	ctl_addr = devm_ioport_map(&pdev->dev, ctl, 1);
 	if (!io_addr || !ctl_addr)
 		goto fail;
 
@@ -275,6 +276,8 @@ static __init int qdi_init_one(unsigned long port, int type, unsigned long io, i
 	ap->ioaddr.ctl_addr = ctl_addr;
 	ata_std_ports(&ap->ioaddr);
 
+	ata_port_desc(ap, "cmd %lx ctl %lx", io, ctl);
+
 	/*
 	 *	Hook in a private data structure per channel
 	 */
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index e138343b5d4..2153def3f34 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -1159,6 +1159,9 @@ static int scc_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 		return rc;
 	host->iomap = pcim_iomap_table(pdev);
 
+	ata_port_pbar_desc(host->ports[0], SCC_CTRL_BAR, -1, "ctrl");
+	ata_port_pbar_desc(host->ports[0], SCC_BMID_BAR, -1, "bmid");
+
 	rc = scc_host_init(host);
 	if (rc)
 		return rc;
diff --git a/drivers/ata/pata_winbond.c b/drivers/ata/pata_winbond.c
index 553658bacce..549cbbe9fd0 100644
--- a/drivers/ata/pata_winbond.c
+++ b/drivers/ata/pata_winbond.c
@@ -197,6 +197,7 @@ static __init int winbond_init_one(unsigned long port)
 
 	for (i = 0; i < 2 ; i ++) {
 		unsigned long cmd_port = 0x1F0 - (0x80 * i);
+		unsigned long ctl_port = cmd_port + 0x206;
 		struct ata_host *host;
 		struct ata_port *ap;
 		void __iomem *cmd_addr, *ctl_addr;
@@ -212,14 +213,16 @@ static __init int winbond_init_one(unsigned long port)
 		host = ata_host_alloc(&pdev->dev, 1);
 		if (!host)
 			goto err_unregister;
+		ap = host->ports[0];
 
 		rc = -ENOMEM;
 		cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
-		ctl_addr = devm_ioport_map(&pdev->dev, cmd_port + 0x0206, 1);
+		ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
 		if (!cmd_addr || !ctl_addr)
 			goto err_unregister;
 
-		ap = host->ports[0];
+		ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);
+
 		ap->ops = &winbond_port_ops;
 		ap->pio_mask = 0x1F;
 		ap->flags |= ATA_FLAG_SLAVE_POSS;
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index 42fd15aaba0..8d1b03d5bcb 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -704,9 +704,16 @@ static int adma_ata_init_one(struct pci_dev *pdev,
 	if (rc)
 		return rc;
 
-	for (port_no = 0; port_no < ADMA_PORTS; ++port_no)
-		adma_ata_setup_port(&host->ports[port_no]->ioaddr,
-				    ADMA_ATA_REGS(mmio_base, port_no));
+	for (port_no = 0; port_no < ADMA_PORTS; ++port_no) {
+		struct ata_port *ap = host->ports[port_no];
+		void __iomem *port_base = ADMA_ATA_REGS(mmio_base, port_no);
+		unsigned int offset = port_base - mmio_base;
+
+		adma_ata_setup_port(&ap->ioaddr, port_base);
+
+		ata_port_pbar_desc(ap, ADMA_MMIO_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, ADMA_MMIO_BAR, offset, "port");
+	}
 
 	/* initialize adapter */
 	adma_host_init(host, board_idx);
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index f0ea0e166c1..08595f34b3e 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -693,16 +693,24 @@ static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	host->iomap = iomap = pcim_iomap_table(pdev);
 
 	for (i = 0; i < NR_PORTS; i++) {
-		struct ata_ioports *port = &host->ports[i]->ioaddr;
-		void __iomem *port_base = iomap[MMIO_BAR] + i * PORT_SIZE;
+		struct ata_port *ap = host->ports[i];
+		struct ata_ioports *port = &ap->ioaddr;
+		unsigned int offset = i * PORT_SIZE;
 
 		port->cmd_addr = iomap[2 * i];
 		port->altstatus_addr =
 		port->ctl_addr = (void __iomem *)
 			((unsigned long)iomap[2 * i + 1] | ATA_PCI_CTL_OFS);
-		port->scr_addr = port_base + PORT_SCR;
+		port->scr_addr = iomap[MMIO_BAR] + offset + PORT_SCR;
 
 		ata_std_ports(port);
+
+		ata_port_pbar_desc(ap, MMIO_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, MMIO_BAR, offset, "port");
+		ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
+		  (unsigned long long)pci_resource_start(pdev, 2 * i),
+		  (unsigned long long)pci_resource_start(pdev, (2 * i + 1)) |
+				      ATA_PCI_CTL_OFS);
 	}
 
 	hpriv->cached_hctl = readw(iomap[MMIO_BAR] + HOST_CTL);
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 68c3f22890d..08077efa9af 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2584,8 +2584,14 @@ static int mv_init_host(struct ata_host *host, unsigned int board_idx)
 	}
 
 	for (port = 0; port < host->n_ports; port++) {
+		struct ata_port *ap = host->ports[port];
 		void __iomem *port_mmio = mv_port_base(mmio, port);
-		mv_port_init(&host->ports[port]->ioaddr, port_mmio);
+		unsigned int offset = port_mmio - mmio;
+
+		mv_port_init(&ap->ioaddr, port_mmio);
+
+		ata_port_pbar_desc(ap, MV_PRIMARY_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, MV_PRIMARY_BAR, offset, "port");
 	}
 
 	for (hc = 0; hc < n_hc; hc++) {
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 983bff5c4de..903213153b5 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -1003,10 +1003,15 @@ static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *e
 
 	is_sataii_tx4 = pdc_is_sataii_tx4(pi->flags);
 	for (i = 0; i < host->n_ports; i++) {
+		struct ata_port *ap = host->ports[i];
 		unsigned int ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
-		pdc_ata_setup_port(host->ports[i],
-				   base + 0x200 + ata_no * 0x80,
-				   base + 0x400 + ata_no * 0x100);
+		unsigned int port_offset = 0x200 + ata_no * 0x80;
+		unsigned int scr_offset = 0x400 + ata_no * 0x100;
+
+		pdc_ata_setup_port(ap, base + port_offset, base + scr_offset);
+
+		ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, PDC_MMIO_BAR, port_offset, "port");
 	}
 
 	/* initialize adapter */
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 10bf52ca1e1..c4c4cd29eeb 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -635,9 +635,14 @@ static int qs_ata_init_one(struct pci_dev *pdev,
 		return rc;
 
 	for (port_no = 0; port_no < host->n_ports; ++port_no) {
-		void __iomem *chan =
-			host->iomap[QS_MMIO_BAR] + (port_no * 0x4000);
-		qs_ata_setup_port(&host->ports[port_no]->ioaddr, chan);
+		struct ata_port *ap = host->ports[port_no];
+		unsigned int offset = port_no * 0x4000;
+		void __iomem *chan = host->iomap[QS_MMIO_BAR] + offset;
+
+		qs_ata_setup_port(&ap->ioaddr, chan);
+
+		ata_port_pbar_desc(ap, QS_MMIO_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, QS_MMIO_BAR, offset, "port");
 	}
 
 	/* initialize adapter */
diff --git a/drivers/ata/sata_sil.c b/drivers/ata/sata_sil.c
index df0ac77fcdd..ea3a0ab7e02 100644
--- a/drivers/ata/sata_sil.c
+++ b/drivers/ata/sata_sil.c
@@ -687,7 +687,8 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	mmio_base = host->iomap[SIL_MMIO_BAR];
 
 	for (i = 0; i < host->n_ports; i++) {
-		struct ata_ioports *ioaddr = &host->ports[i]->ioaddr;
+		struct ata_port *ap = host->ports[i];
+		struct ata_ioports *ioaddr = &ap->ioaddr;
 
 		ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
 		ioaddr->altstatus_addr =
@@ -695,6 +696,9 @@ static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 		ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
 		ioaddr->scr_addr = mmio_base + sil_port[i].scr;
 		ata_std_ports(ioaddr);
+
+		ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
 	}
 
 	/* initialize and activate */
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index e0cd31aa800..3dcb223117b 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -1119,12 +1119,15 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	host->iomap = iomap;
 
 	for (i = 0; i < host->n_ports; i++) {
-		void __iomem *port = iomap[SIL24_PORT_BAR] + i * PORT_REGS_SIZE;
+		struct ata_port *ap = host->ports[i];
+		size_t offset = ap->port_no * PORT_REGS_SIZE;
+		void __iomem *port = iomap[SIL24_PORT_BAR] + offset;
 
 		host->ports[i]->ioaddr.cmd_addr = port;
 		host->ports[i]->ioaddr.scr_addr = port + PORT_SCONTROL;
 
-		ata_std_ports(&host->ports[i]->ioaddr);
+		ata_port_pbar_desc(ap, SIL24_HOST_BAR, -1, "host");
+		ata_port_pbar_desc(ap, SIL24_PORT_BAR, offset, "port");
 	}
 
 	/* configure and activate the device */
diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index 822cabfec95..12d613c48c1 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -443,9 +443,15 @@ static int k2_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *e
 	/* different controllers have different number of ports - currently 4 or 8 */
 	/* All ports are on the same function. Multi-function device is no
 	 * longer available. This should not be seen in any system. */
-	for (i = 0; i < host->n_ports; i++)
-		k2_sata_setup_port(&host->ports[i]->ioaddr,
-				   mmio_base + i * K2_SATA_PORT_OFFSET);
+	for (i = 0; i < host->n_ports; i++) {
+		struct ata_port *ap = host->ports[i];
+		unsigned int offset = i * K2_SATA_PORT_OFFSET;
+
+		k2_sata_setup_port(&ap->ioaddr, mmio_base + offset);
+
+		ata_port_pbar_desc(ap, 5, -1, "mmio");
+		ata_port_pbar_desc(ap, 5, offset, "port");
+	}
 
 	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 	if (rc)
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index b425061dbe8..9f9f7b30654 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -1381,9 +1381,8 @@ static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *
 	const struct ata_port_info *ppi[] =
 		{ &pdc_port_info[ent->driver_data], NULL };
 	struct ata_host *host;
-	void __iomem *base;
 	struct pdc_host_priv *hpriv;
-	int rc;
+	int i, rc;
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
@@ -1409,11 +1408,17 @@ static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *
 		return rc;
 	host->iomap = pcim_iomap_table(pdev);
 
-	base = host->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
-	pdc_sata_setup_port(&host->ports[0]->ioaddr, base + 0x200);
-	pdc_sata_setup_port(&host->ports[1]->ioaddr, base + 0x280);
-	pdc_sata_setup_port(&host->ports[2]->ioaddr, base + 0x300);
-	pdc_sata_setup_port(&host->ports[3]->ioaddr, base + 0x380);
+	for (i = 0; i < 4; i++) {
+		struct ata_port *ap = host->ports[i];
+		void __iomem *base = host->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
+		unsigned int offset = 0x200 + i * 0x80;
+
+		pdc_sata_setup_port(&ap->ioaddr, base + offset);
+
+		ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, PDC_DIMM_BAR, -1, "dimm");
+		ata_port_pbar_desc(ap, PDC_MMIO_BAR, offset, "port");
+	}
 
 	/* configure and activate */
 	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index 6c53a790805..d394da085ae 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -239,6 +239,12 @@ static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 		hpriv->scr_cfg_addr[2] = ULI5287_BASE + ULI5287_OFFS*4;
 		ata_std_ports(ioaddr);
 
+		ata_port_desc(host->ports[2],
+			"cmd 0x%llx ctl 0x%llx bmdma 0x%llx",
+			(unsigned long long)pci_resource_start(pdev, 0) + 8,
+			((unsigned long long)pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS) + 4,
+			(unsigned long long)pci_resource_start(pdev, 4) + 16);
+
 		ioaddr = &host->ports[3]->ioaddr;
 		ioaddr->cmd_addr = iomap[2] + 8;
 		ioaddr->altstatus_addr =
@@ -247,6 +253,13 @@ static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 		ioaddr->bmdma_addr = iomap[4] + 24;
 		hpriv->scr_cfg_addr[3] = ULI5287_BASE + ULI5287_OFFS*5;
 		ata_std_ports(ioaddr);
+
+		ata_port_desc(host->ports[2],
+			"cmd 0x%llx ctl 0x%llx bmdma 0x%llx",
+			(unsigned long long)pci_resource_start(pdev, 2) + 9,
+			((unsigned long long)pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS) + 4,
+			(unsigned long long)pci_resource_start(pdev, 4) + 24);
+
 		break;
 
 	case uli_5289:
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 25162ec9938..f0757023ce9 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -399,6 +399,9 @@ static void vt6421_init_addrs(struct ata_port *ap)
 	ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no);
 
 	ata_std_ports(ioaddr);
+
+	ata_port_pbar_desc(ap, ap->port_no, -1, "port");
+	ata_port_pbar_desc(ap, 4, ap->port_no * 8, "bmdma");
 }
 
 static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index b1777c3f6d5..0d9be168487 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -406,9 +406,15 @@ static int __devinit vsc_sata_init_one (struct pci_dev *pdev, const struct pci_d
 
 	mmio_base = host->iomap[VSC_MMIO_BAR];
 
-	for (i = 0; i < host->n_ports; i++)
-		vsc_sata_setup_port(&host->ports[i]->ioaddr,
-				    mmio_base + (i + 1) * VSC_SATA_PORT_OFFSET);
+	for (i = 0; i < host->n_ports; i++) {
+		struct ata_port *ap = host->ports[i];
+		unsigned int offset = (i + 1) * VSC_SATA_PORT_OFFSET;
+
+		vsc_sata_setup_port(&ap->ioaddr, mmio_base + offset);
+
+		ata_port_pbar_desc(ap, VSC_MMIO_BAR, -1, "mmio");
+		ata_port_pbar_desc(ap, VSC_MMIO_BAR, offset, "port");
+	}
 
 	/*
 	 * Use 32 bit DMA mask, because 64 bit address support is poor.
diff --git a/include/linux/libata.h b/include/linux/libata.h
index e7d163edb4c..d3defae689c 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -368,8 +368,6 @@ struct ata_ioports {
 struct ata_host {
 	spinlock_t		lock;
 	struct device 		*dev;
-	unsigned long		irq;
-	unsigned long		irq2;
 	void __iomem * const	*iomap;
 	unsigned int		n_ports;
 	void			*private_data;
@@ -968,6 +966,16 @@ static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
 	ehi->err_mask |= AC_ERR_ATA_BUS;
 }
 
+/*
+ * port description helpers
+ */
+extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
+	__attribute__ ((format (printf, 2, 3)));
+#ifdef CONFIG_PCI
+extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
+			       const char *name);
+#endif
+
 /*
  * qc helpers
  */
-- 
cgit v1.2.3-70-g09d2


From a1e10f7e68a544c80081fee4fa550dc28389f44a Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sat, 18 Aug 2007 13:28:49 +0900
Subject: libata: move EH repeat reporting into ata_eh_report()

EH is sometimes repeated without any error or action.  For example,
this happens when probing IDENTIFY fails because of a phantom device.
In these cases, all the repeated EH does is making sure there is no
unhandled error or pending action and return.  This repeation is
necessary to avoid losing any event which occurred while EH was in
progress.

Unfortunately, this dry run causes annonying "EH pending after
completion" message.  This patch moves the repeat reporting into
ata_eh_report() such that it's more compact and skipped on dry runs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Mikael Pettersson <mikep@it.uu.se>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 30 ++++++++++++++++++------------
 include/linux/libata.h  |  5 +++--
 2 files changed, 21 insertions(+), 14 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 8219e2d7104..daa2f74f73c 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -358,7 +358,7 @@ enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
 void ata_scsi_error(struct Scsi_Host *host)
 {
 	struct ata_port *ap = ata_shost_to_port(host);
-	int i, repeat_cnt = ATA_EH_MAX_REPEAT;
+	int i;
 	unsigned long flags;
 
 	DPRINTK("ENTER\n");
@@ -424,6 +424,9 @@ void ata_scsi_error(struct Scsi_Host *host)
 			__ata_port_freeze(ap);
 
 		spin_unlock_irqrestore(ap->lock, flags);
+
+		/* initialize eh_tries */
+		ap->eh_tries = ATA_EH_MAX_TRIES;
 	} else
 		spin_unlock_wait(ap->lock);
 
@@ -468,15 +471,12 @@ void ata_scsi_error(struct Scsi_Host *host)
 		spin_lock_irqsave(ap->lock, flags);
 
 		if (ap->pflags & ATA_PFLAG_EH_PENDING) {
-			if (--repeat_cnt) {
-				ata_port_printk(ap, KERN_INFO,
-					"EH pending after completion, "
-					"repeating EH (cnt=%d)\n", repeat_cnt);
+			if (--ap->eh_tries) {
 				spin_unlock_irqrestore(ap->lock, flags);
 				goto repeat;
 			}
 			ata_port_printk(ap, KERN_ERR, "EH pending after %d "
-					"tries, giving up\n", ATA_EH_MAX_REPEAT);
+					"tries, giving up\n", ATA_EH_MAX_TRIES);
 			ap->pflags &= ~ATA_PFLAG_EH_PENDING;
 		}
 
@@ -1778,6 +1778,7 @@ static void ata_eh_link_report(struct ata_link *link)
 	struct ata_port *ap = link->ap;
 	struct ata_eh_context *ehc = &link->eh_context;
 	const char *frozen, *desc;
+	char tries_buf[6];
 	int tag, nr_failed = 0;
 
 	desc = NULL;
@@ -1802,18 +1803,23 @@ static void ata_eh_link_report(struct ata_link *link)
 	if (ap->pflags & ATA_PFLAG_FROZEN)
 		frozen = " frozen";
 
+	memset(tries_buf, 0, sizeof(tries_buf));
+	if (ap->eh_tries < ATA_EH_MAX_TRIES)
+		snprintf(tries_buf, sizeof(tries_buf) - 1, " t%d",
+			 ap->eh_tries);
+
 	if (ehc->i.dev) {
 		ata_dev_printk(ehc->i.dev, KERN_ERR, "exception Emask 0x%x "
-			       "SAct 0x%x SErr 0x%x action 0x%x%s\n",
-			       ehc->i.err_mask, link->sactive,
-			       ehc->i.serror, ehc->i.action, frozen);
+			       "SAct 0x%x SErr 0x%x action 0x%x%s%s\n",
+			       ehc->i.err_mask, link->sactive, ehc->i.serror,
+			       ehc->i.action, frozen, tries_buf);
 		if (desc)
 			ata_dev_printk(ehc->i.dev, KERN_ERR, "%s\n", desc);
 	} else {
 		ata_link_printk(link, KERN_ERR, "exception Emask 0x%x "
-				"SAct 0x%x SErr 0x%x action 0x%x%s\n",
-				ehc->i.err_mask, link->sactive,
-				ehc->i.serror, ehc->i.action, frozen);
+				"SAct 0x%x SErr 0x%x action 0x%x%s%s\n",
+				ehc->i.err_mask, link->sactive, ehc->i.serror,
+				ehc->i.action, frozen, tries_buf);
 		if (desc)
 			ata_link_printk(link, KERN_ERR, "%s\n", desc);
 	}
diff --git a/include/linux/libata.h b/include/linux/libata.h
index d3defae689c..74e034ea901 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -293,8 +293,8 @@ enum {
 	ATA_EHI_DID_RESET	= ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
 	ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
 
-	/* max repeat if error condition is still set after ->error_handler */
-	ATA_EH_MAX_REPEAT	= 5,
+	/* max tries if error condition is still set after ->error_handler */
+	ATA_EH_MAX_TRIES	= 5,
 
 	/* how hard are we gonna try to probe/recover devices */
 	ATA_PROBE_MAX_TRIES	= 3,
@@ -581,6 +581,7 @@ struct ata_port {
 	u32			msg_enable;
 	struct list_head	eh_done_q;
 	wait_queue_head_t	eh_wait_q;
+	int			eh_tries;
 
 	pm_message_t		pm_mesg;
 	int			*pm_result;
-- 
cgit v1.2.3-70-g09d2


From d830d1731fa5906aad20c228ac8b73005b13d468 Mon Sep 17 00:00:00 2001
From: Sonic Zhang <sonic.adi@gmail.com>
Date: Tue, 21 Aug 2007 13:12:31 +0800
Subject: libata driver for bf548 on chip ATAPI controller.

Fix all issues pointed out in Jeff's email.

Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/Kconfig      |   16 +
 drivers/ata/Makefile     |    1 +
 drivers/ata/pata_bf54x.c | 1627 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1644 insertions(+)
 create mode 100644 drivers/ata/pata_bf54x.c

(limited to 'drivers/ata')

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index d8046a113c3..a427945f0bb 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -596,4 +596,20 @@ config PATA_SCC
 
 	  If unsure, say N.
 
+config PATA_BF54X
+	tristate "Blackfin 54x ATAPI support"
+	depends on BF542 || BF548 || BF549
+	help
+	  This option enables support for the built-in ATAPI controller on
+	  Blackfin 54x family chips.
+
+	  If unsure, say N.
+
+config PATA_BF54X_DMA
+	bool "DMA mode"
+	depends on PATA_BF54X
+	default y
+	help
+	  Enable DMA mode for Blackfin ATAPI controller.
+
 endif # ATA
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 8149c68ac2c..c2ecba5f0b4 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_PATA_SIS)		+= pata_sis.o
 obj-$(CONFIG_PATA_TRIFLEX)	+= pata_triflex.o
 obj-$(CONFIG_PATA_IXP4XX_CF)	+= pata_ixp4xx_cf.o
 obj-$(CONFIG_PATA_SCC)		+= pata_scc.o
+obj-$(CONFIG_PATA_BF54X)	+= pata_bf54x.o
 obj-$(CONFIG_PATA_PLATFORM)	+= pata_platform.o
 obj-$(CONFIG_PATA_ICSIDE)	+= pata_icside.o
 # Should be last but one libata driver
diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c
new file mode 100644
index 00000000000..747549e4563
--- /dev/null
+++ b/drivers/ata/pata_bf54x.c
@@ -0,0 +1,1627 @@
+/*
+ * File:         drivers/ata/pata_bf54x.c
+ * Author:       Sonic Zhang <sonic.zhang@analog.com>
+ *
+ * Created:
+ * Description:  PATA Driver for blackfin 54x
+ *
+ * Modified:
+ *               Copyright 2007 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/platform_device.h>
+#include <asm/dma.h>
+#include <asm/gpio.h>
+#include <asm/portmux.h>
+
+#define DRV_NAME		"pata-bf54x"
+#define DRV_VERSION		"0.9"
+
+#define ATA_REG_CTRL		0x0E
+#define ATA_REG_ALTSTATUS	ATA_REG_CTRL
+
+/* These are the offset of the controller's registers */
+#define ATAPI_OFFSET_CONTROL		0x00
+#define ATAPI_OFFSET_STATUS		0x04
+#define ATAPI_OFFSET_DEV_ADDR		0x08
+#define ATAPI_OFFSET_DEV_TXBUF		0x0c
+#define ATAPI_OFFSET_DEV_RXBUF		0x10
+#define ATAPI_OFFSET_INT_MASK		0x14
+#define ATAPI_OFFSET_INT_STATUS		0x18
+#define ATAPI_OFFSET_XFER_LEN		0x1c
+#define ATAPI_OFFSET_LINE_STATUS	0x20
+#define ATAPI_OFFSET_SM_STATE		0x24
+#define ATAPI_OFFSET_TERMINATE		0x28
+#define ATAPI_OFFSET_PIO_TFRCNT		0x2c
+#define ATAPI_OFFSET_DMA_TFRCNT		0x30
+#define ATAPI_OFFSET_UMAIN_TFRCNT	0x34
+#define ATAPI_OFFSET_UDMAOUT_TFRCNT	0x38
+#define ATAPI_OFFSET_REG_TIM_0		0x40
+#define ATAPI_OFFSET_PIO_TIM_0		0x44
+#define ATAPI_OFFSET_PIO_TIM_1		0x48
+#define ATAPI_OFFSET_MULTI_TIM_0	0x50
+#define ATAPI_OFFSET_MULTI_TIM_1	0x54
+#define ATAPI_OFFSET_MULTI_TIM_2	0x58
+#define ATAPI_OFFSET_ULTRA_TIM_0	0x60
+#define ATAPI_OFFSET_ULTRA_TIM_1	0x64
+#define ATAPI_OFFSET_ULTRA_TIM_2	0x68
+#define ATAPI_OFFSET_ULTRA_TIM_3	0x6c
+
+
+#define ATAPI_GET_CONTROL(base)\
+	bfin_read16(base + ATAPI_OFFSET_CONTROL)
+#define ATAPI_SET_CONTROL(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_CONTROL, val)
+#define ATAPI_GET_STATUS(base)\
+	bfin_read16(base + ATAPI_OFFSET_STATUS)
+#define ATAPI_GET_DEV_ADDR(base)\
+	bfin_read16(base + ATAPI_OFFSET_DEV_ADDR)
+#define ATAPI_SET_DEV_ADDR(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_DEV_ADDR, val)
+#define ATAPI_GET_DEV_TXBUF(base)\
+	bfin_read16(base + ATAPI_OFFSET_DEV_TXBUF)
+#define ATAPI_SET_DEV_TXBUF(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_DEV_TXBUF, val)
+#define ATAPI_GET_DEV_RXBUF(base)\
+	bfin_read16(base + ATAPI_OFFSET_DEV_RXBUF)
+#define ATAPI_SET_DEV_RXBUF(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_DEV_RXBUF, val)
+#define ATAPI_GET_INT_MASK(base)\
+	bfin_read16(base + ATAPI_OFFSET_INT_MASK)
+#define ATAPI_SET_INT_MASK(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_INT_MASK, val)
+#define ATAPI_GET_INT_STATUS(base)\
+	bfin_read16(base + ATAPI_OFFSET_INT_STATUS)
+#define ATAPI_SET_INT_STATUS(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_INT_STATUS, val)
+#define ATAPI_GET_XFER_LEN(base)\
+	bfin_read16(base + ATAPI_OFFSET_XFER_LEN)
+#define ATAPI_SET_XFER_LEN(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_XFER_LEN, val)
+#define ATAPI_GET_LINE_STATUS(base)\
+	bfin_read16(base + ATAPI_OFFSET_LINE_STATUS)
+#define ATAPI_GET_SM_STATE(base)\
+	bfin_read16(base + ATAPI_OFFSET_SM_STATE)
+#define ATAPI_GET_TERMINATE(base)\
+	bfin_read16(base + ATAPI_OFFSET_TERMINATE)
+#define ATAPI_SET_TERMINATE(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_TERMINATE, val)
+#define ATAPI_GET_PIO_TFRCNT(base)\
+	bfin_read16(base + ATAPI_OFFSET_PIO_TFRCNT)
+#define ATAPI_GET_DMA_TFRCNT(base)\
+	bfin_read16(base + ATAPI_OFFSET_DMA_TFRCNT)
+#define ATAPI_GET_UMAIN_TFRCNT(base)\
+	bfin_read16(base + ATAPI_OFFSET_UMAIN_TFRCNT)
+#define ATAPI_GET_UDMAOUT_TFRCNT(base)\
+	bfin_read16(base + ATAPI_OFFSET_UDMAOUT_TFRCNT)
+#define ATAPI_GET_REG_TIM_0(base)\
+	bfin_read16(base + ATAPI_OFFSET_REG_TIM_0)
+#define ATAPI_SET_REG_TIM_0(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_REG_TIM_0, val)
+#define ATAPI_GET_PIO_TIM_0(base)\
+	bfin_read16(base + ATAPI_OFFSET_PIO_TIM_0)
+#define ATAPI_SET_PIO_TIM_0(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_PIO_TIM_0, val)
+#define ATAPI_GET_PIO_TIM_1(base)\
+	bfin_read16(base + ATAPI_OFFSET_PIO_TIM_1)
+#define ATAPI_SET_PIO_TIM_1(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_PIO_TIM_1, val)
+#define ATAPI_GET_MULTI_TIM_0(base)\
+	bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_0)
+#define ATAPI_SET_MULTI_TIM_0(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_0, val)
+#define ATAPI_GET_MULTI_TIM_1(base)\
+	bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_1)
+#define ATAPI_SET_MULTI_TIM_1(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_1, val)
+#define ATAPI_GET_MULTI_TIM_2(base)\
+	bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_2)
+#define ATAPI_SET_MULTI_TIM_2(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_2, val)
+#define ATAPI_GET_ULTRA_TIM_0(base)\
+	bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_0)
+#define ATAPI_SET_ULTRA_TIM_0(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_0, val)
+#define ATAPI_GET_ULTRA_TIM_1(base)\
+	bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_1)
+#define ATAPI_SET_ULTRA_TIM_1(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_1, val)
+#define ATAPI_GET_ULTRA_TIM_2(base)\
+	bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_2)
+#define ATAPI_SET_ULTRA_TIM_2(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_2, val)
+#define ATAPI_GET_ULTRA_TIM_3(base)\
+	bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_3)
+#define ATAPI_SET_ULTRA_TIM_3(base, val)\
+	bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_3, val)
+
+/**
+ * PIO Mode - Frequency compatibility
+ */
+/* mode: 0         1         2         3         4 */
+static const u32 pio_fsclk[] =
+{ 33333333, 33333333, 33333333, 33333333, 33333333 };
+
+/**
+ * MDMA Mode - Frequency compatibility
+ */
+/*               mode:      0         1         2        */
+static const u32 mdma_fsclk[] = { 33333333, 33333333, 33333333 };
+
+/**
+ * UDMA Mode - Frequency compatibility
+ *
+ * UDMA5 - 100 MB/s   - SCLK  = 133 MHz
+ * UDMA4 - 66 MB/s    - SCLK >=  80 MHz
+ * UDMA3 - 44.4 MB/s  - SCLK >=  50 MHz
+ * UDMA2 - 33 MB/s    - SCLK >=  40 MHz
+ */
+/* mode: 0         1         2         3         4          5 */
+static const u32 udma_fsclk[] =
+{ 33333333, 33333333, 40000000, 50000000, 80000000, 133333333 };
+
+/**
+ * Register transfer timing table
+ */
+/*               mode:       0    1    2    3    4    */
+/* Cycle Time                     */
+static const u32 reg_t0min[]   = { 600, 383, 330, 180, 120 };
+/* DIOR/DIOW to end cycle         */
+static const u32 reg_t2min[]   = { 290, 290, 290, 70,  25  };
+/* DIOR/DIOW asserted pulse width */
+static const u32 reg_teocmin[] = { 290, 290, 290, 80,  70  };
+
+/**
+ * PIO timing table
+ */
+/*               mode:       0    1    2    3    4    */
+/* Cycle Time                     */
+static const u32 pio_t0min[]   = { 600, 383, 240, 180, 120 };
+/* Address valid to DIOR/DIORW    */
+static const u32 pio_t1min[]   = { 70,  50,  30,  30,  25  };
+/* DIOR/DIOW to end cycle         */
+static const u32 pio_t2min[]   = { 165, 125, 100, 80,  70  };
+/* DIOR/DIOW asserted pulse width */
+static const u32 pio_teocmin[] = { 165, 125, 100, 70,  25  };
+/* DIOW data hold                 */
+static const u32 pio_t4min[]   = { 30,  20,  15,  10,  10  };
+
+/* ******************************************************************
+ * Multiword DMA timing table
+ * ******************************************************************
+ */
+/*               mode:       0   1    2        */
+/* Cycle Time                     */
+static const u32 mdma_t0min[]  = { 480, 150, 120 };
+/* DIOR/DIOW asserted pulse width */
+static const u32 mdma_tdmin[]  = { 215, 80,  70  };
+/* DMACK to read data released    */
+static const u32 mdma_thmin[]  = { 20,  15,  10  };
+/* DIOR/DIOW to DMACK hold        */
+static const u32 mdma_tjmin[]  = { 20,  5,   5   };
+/* DIOR negated pulse width       */
+static const u32 mdma_tkrmin[] = { 50,  50,  25  };
+/* DIOR negated pulse width       */
+static const u32 mdma_tkwmin[] = { 215, 50,  25  };
+/* CS[1:0] valid to DIOR/DIOW     */
+static const u32 mdma_tmmin[]  = { 50,  30,  25  };
+/* DMACK to read data released    */
+static const u32 mdma_tzmax[]  = { 20,  25,  25  };
+
+/**
+ * Ultra DMA timing table
+ */
+/*               mode:         0    1    2    3    4    5       */
+static const u32 udma_tcycmin[]  = { 112, 73,  54,  39,  25,  17 };
+static const u32 udma_tdvsmin[]  = { 70,  48,  31,  20,  7,   5  };
+static const u32 udma_tenvmax[]  = { 70,  70,  70,  55,  55,  50 };
+static const u32 udma_trpmin[]   = { 160, 125, 100, 100, 100, 85 };
+static const u32 udma_tmin[]     = { 5,   5,   5,   5,   3,   3  };
+
+
+static const u32 udma_tmlimin = 20;
+static const u32 udma_tzahmin = 20;
+static const u32 udma_tenvmin = 20;
+static const u32 udma_tackmin = 20;
+static const u32 udma_tssmin = 50;
+
+/**
+ *
+ *	Function:       num_clocks_min
+ *
+ *	Description:
+ *	calculate number of SCLK cycles to meet minimum timing
+ */
+static unsigned short num_clocks_min(unsigned long tmin,
+				unsigned long fsclk)
+{
+	unsigned long tmp ;
+	unsigned short result;
+
+	tmp = tmin * (fsclk/1000/1000) / 1000;
+	result = (unsigned short)tmp;
+	if ((tmp*1000*1000) < (tmin*(fsclk/1000))) {
+		result++;
+	}
+
+	return result;
+}
+
+/**
+ *	bfin_set_piomode - Initialize host controller PATA PIO timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: um
+ *
+ *	Set PIO mode for device.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void bfin_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	int mode = adev->pio_mode - XFER_PIO_0;
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	unsigned int fsclk = get_sclk();
+	unsigned short teoc_reg, t2_reg, teoc_pio;
+	unsigned short t4_reg, t2_pio, t1_reg;
+	unsigned short n0, n6, t6min = 5;
+
+	/* the most restrictive timing value is t6 and tc, the DIOW - data hold
+	* If one SCLK pulse is longer than this minimum value then register
+	* transfers cannot be supported at this frequency.
+	*/
+	n6 = num_clocks_min(t6min, fsclk);
+	if (mode >= 0 && mode <= 4 && n6 >= 1) {
+		pr_debug("set piomode: mode=%d, fsclk=%ud\n", mode, fsclk);
+		/* calculate the timing values for register transfers. */
+		while (mode > 0 && pio_fsclk[mode] > fsclk)
+			mode--;
+
+		/* DIOR/DIOW to end cycle time */
+		t2_reg = num_clocks_min(reg_t2min[mode], fsclk);
+		/* DIOR/DIOW asserted pulse width */
+		teoc_reg = num_clocks_min(reg_teocmin[mode], fsclk);
+		/* Cycle Time */
+		n0  = num_clocks_min(reg_t0min[mode], fsclk);
+
+		/* increase t2 until we meed the minimum cycle length */
+		if (t2_reg + teoc_reg < n0)
+			t2_reg = n0 - teoc_reg;
+
+		/* calculate the timing values for pio transfers. */
+
+		/* DIOR/DIOW to end cycle time */
+		t2_pio = num_clocks_min(pio_t2min[mode], fsclk);
+		/* DIOR/DIOW asserted pulse width */
+		teoc_pio = num_clocks_min(pio_teocmin[mode], fsclk);
+		/* Cycle Time */
+		n0  = num_clocks_min(pio_t0min[mode], fsclk);
+
+		/* increase t2 until we meed the minimum cycle length */
+		if (t2_pio + teoc_pio < n0)
+			t2_pio = n0 - teoc_pio;
+
+		/* Address valid to DIOR/DIORW */
+		t1_reg = num_clocks_min(pio_t1min[mode], fsclk);
+
+		/* DIOW data hold */
+		t4_reg = num_clocks_min(pio_t4min[mode], fsclk);
+
+		ATAPI_SET_REG_TIM_0(base, (teoc_reg<<8 | t2_reg));
+		ATAPI_SET_PIO_TIM_0(base, (t4_reg<<12 | t2_pio<<4 | t1_reg));
+		ATAPI_SET_PIO_TIM_1(base, teoc_pio);
+		if (mode > 2) {
+			ATAPI_SET_CONTROL(base,
+				ATAPI_GET_CONTROL(base) | IORDY_EN);
+		} else {
+			ATAPI_SET_CONTROL(base,
+				ATAPI_GET_CONTROL(base) & ~IORDY_EN);
+		}
+
+		/* Disable host ATAPI PIO interrupts */
+		ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
+			& ~(PIO_DONE_MASK | HOST_TERM_XFER_MASK));
+		SSYNC();
+	}
+}
+
+/**
+ *	bfin_set_dmamode - Initialize host controller PATA DMA timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: um
+ *	@udma: udma mode, 0 - 6
+ *
+ *	Set UDMA mode for device.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	int mode;
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	unsigned long fsclk = get_sclk();
+	unsigned short tenv, tack, tcyc_tdvs, tdvs, tmli, tss, trp, tzah;
+	unsigned short tm, td, tkr, tkw, teoc, th;
+	unsigned short n0, nf, tfmin = 5;
+	unsigned short nmin, tcyc;
+
+	mode = adev->dma_mode - XFER_UDMA_0;
+	if (mode >= 0 && mode <= 5) {
+		pr_debug("set udmamode: mode=%d\n", mode);
+		/* the most restrictive timing value is t6 and tc,
+		 * the DIOW - data hold. If one SCLK pulse is longer
+		 * than this minimum value then register
+		 * transfers cannot be supported at this frequency.
+		 */
+		while (mode > 0 && udma_fsclk[mode] > fsclk)
+			mode--;
+
+		nmin = num_clocks_min(udma_tmin[mode], fsclk);
+		if (nmin >= 1) {
+			/* calculate the timing values for Ultra DMA. */
+			tdvs = num_clocks_min(udma_tdvsmin[mode], fsclk);
+			tcyc = num_clocks_min(udma_tcycmin[mode], fsclk);
+			tcyc_tdvs = 2;
+
+			/* increase tcyc - tdvs (tcyc_tdvs) until we meed
+			 * the minimum cycle length
+			 */
+			if (tdvs + tcyc_tdvs < tcyc)
+				tcyc_tdvs = tcyc - tdvs;
+
+			/* Mow assign the values required for the timing
+			 * registers
+			 */
+			if (tcyc_tdvs < 2)
+				tcyc_tdvs = 2;
+
+			if (tdvs < 2)
+				tdvs = 2;
+
+			tack = num_clocks_min(udma_tackmin, fsclk);
+			tss = num_clocks_min(udma_tssmin, fsclk);
+			tmli = num_clocks_min(udma_tmlimin, fsclk);
+			tzah = num_clocks_min(udma_tzahmin, fsclk);
+			trp = num_clocks_min(udma_trpmin[mode], fsclk);
+			tenv = num_clocks_min(udma_tenvmin, fsclk);
+			if (tenv <= udma_tenvmax[mode]) {
+				ATAPI_SET_ULTRA_TIM_0(base, (tenv<<8 | tack));
+				ATAPI_SET_ULTRA_TIM_1(base,
+					(tcyc_tdvs<<8 | tdvs));
+				ATAPI_SET_ULTRA_TIM_2(base, (tmli<<8 | tss));
+				ATAPI_SET_ULTRA_TIM_3(base, (trp<<8 | tzah));
+
+				/* Enable host ATAPI Untra DMA interrupts */
+				ATAPI_SET_INT_MASK(base,
+					ATAPI_GET_INT_MASK(base)
+					| UDMAIN_DONE_MASK
+					| UDMAOUT_DONE_MASK
+					| UDMAIN_TERM_MASK
+					| UDMAOUT_TERM_MASK);
+			}
+		}
+	}
+
+	mode = adev->dma_mode - XFER_MW_DMA_0;
+	if (mode >= 0 && mode <= 2) {
+		pr_debug("set mdmamode: mode=%d\n", mode);
+		/* the most restrictive timing value is tf, the DMACK to
+		 * read data released. If one SCLK pulse is longer than
+		 * this maximum value then the MDMA mode
+		 * cannot be supported at this frequency.
+		 */
+		while (mode > 0 && mdma_fsclk[mode] > fsclk)
+			mode--;
+
+		nf = num_clocks_min(tfmin, fsclk);
+		if (nf >= 1) {
+			/* calculate the timing values for Multi-word DMA. */
+
+			/* DIOR/DIOW asserted pulse width */
+			td = num_clocks_min(mdma_tdmin[mode], fsclk);
+
+			/* DIOR negated pulse width */
+			tkw = num_clocks_min(mdma_tkwmin[mode], fsclk);
+
+			/* Cycle Time */
+			n0  = num_clocks_min(mdma_t0min[mode], fsclk);
+
+			/* increase tk until we meed the minimum cycle length */
+			if (tkw + td < n0)
+				tkw = n0 - td;
+
+			/* DIOR negated pulse width - read */
+			tkr = num_clocks_min(mdma_tkrmin[mode], fsclk);
+			/* CS{1:0] valid to DIOR/DIOW */
+			tm = num_clocks_min(mdma_tmmin[mode], fsclk);
+			/* DIOR/DIOW to DMACK hold */
+			teoc = num_clocks_min(mdma_tjmin[mode], fsclk);
+			/* DIOW Data hold */
+			th = num_clocks_min(mdma_thmin[mode], fsclk);
+
+			ATAPI_SET_MULTI_TIM_0(base, (tm<<8 | td));
+			ATAPI_SET_MULTI_TIM_1(base, (tkr<<8 | tkw));
+			ATAPI_SET_MULTI_TIM_2(base, (teoc<<8 | th));
+
+			/* Enable host ATAPI Multi DMA interrupts */
+			ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
+				| MULTI_DONE_MASK | MULTI_TERM_MASK);
+			SSYNC();
+		}
+	}
+	return;
+}
+
+/**
+ *
+ *    Function:       wait_complete
+ *
+ *    Description:    Waits the interrupt from device
+ *
+ */
+static inline void wait_complete(void __iomem *base, unsigned short mask)
+{
+	unsigned short status;
+	unsigned int i = 0;
+
+#define PATA_BF54X_WAIT_TIMEOUT		10000
+
+	for (i = 0; i < PATA_BF54X_WAIT_TIMEOUT; i++) {
+		status = ATAPI_GET_INT_STATUS(base) & mask;
+		if (status)
+			break;
+	}
+
+	ATAPI_SET_INT_STATUS(base, mask);
+}
+
+/**
+ *
+ *    Function:       write_atapi_register
+ *
+ *    Description:    Writes to ATA Device Resgister
+ *
+ */
+
+static void write_atapi_register(void __iomem *base,
+		unsigned long ata_reg, unsigned short value)
+{
+	/* Program the ATA_DEV_TXBUF register with write data (to be
+	 * written into the device).
+	 */
+	ATAPI_SET_DEV_TXBUF(base, value);
+
+	/* Program the ATA_DEV_ADDR register with address of the
+	 * device register (0x01 to 0x0F).
+	 */
+	ATAPI_SET_DEV_ADDR(base, ata_reg);
+
+	/* Program the ATA_CTRL register with dir set to write (1)
+	 */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
+
+	/* ensure PIO DMA is not set */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
+
+	/* and start the transfer */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
+
+	/* Wait for the interrupt to indicate the end of the transfer.
+	 * (We need to wait on and clear rhe ATA_DEV_INT interrupt status)
+	 */
+	wait_complete(base, PIO_DONE_INT);
+}
+
+/**
+ *
+ *	Function:       read_atapi_register
+ *
+ *Description:    Reads from ATA Device Resgister
+ *
+ */
+
+static unsigned short read_atapi_register(void __iomem *base,
+		unsigned long ata_reg)
+{
+	/* Program the ATA_DEV_ADDR register with address of the
+	 * device register (0x01 to 0x0F).
+	 */
+	ATAPI_SET_DEV_ADDR(base, ata_reg);
+
+	/* Program the ATA_CTRL register with dir set to read (0) and
+	 */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
+
+	/* ensure PIO DMA is not set */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
+
+	/* and start the transfer */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
+
+	/* Wait for the interrupt to indicate the end of the transfer.
+	 * (PIO_DONE interrupt is set and it doesn't seem to matter
+	 * that we don't clear it)
+	 */
+	wait_complete(base, PIO_DONE_INT);
+
+	/* Read the ATA_DEV_RXBUF register with write data (to be
+	 * written into the device).
+	 */
+	return ATAPI_GET_DEV_RXBUF(base);
+}
+
+/**
+ *
+ *    Function:       write_atapi_register_data
+ *
+ *    Description:    Writes to ATA Device Resgister
+ *
+ */
+
+static void write_atapi_data(void __iomem *base,
+		int len, unsigned short *buf)
+{
+	int i;
+
+	/* Set transfer length to 1 */
+	ATAPI_SET_XFER_LEN(base, 1);
+
+	/* Program the ATA_DEV_ADDR register with address of the
+	 * ATA_REG_DATA
+	 */
+	ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
+
+	/* Program the ATA_CTRL register with dir set to write (1)
+	 */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
+
+	/* ensure PIO DMA is not set */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
+
+	for (i = 0; i < len; i++) {
+		/* Program the ATA_DEV_TXBUF register with write data (to be
+		 * written into the device).
+		 */
+		ATAPI_SET_DEV_TXBUF(base, buf[i]);
+
+		/* and start the transfer */
+		ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
+
+		/* Wait for the interrupt to indicate the end of the transfer.
+		 * (We need to wait on and clear rhe ATA_DEV_INT
+		 * interrupt status)
+		 */
+		wait_complete(base, PIO_DONE_INT);
+	}
+}
+
+/**
+ *
+ *	Function:       read_atapi_register_data
+ *
+ *	Description:    Reads from ATA Device Resgister
+ *
+ */
+
+static void read_atapi_data(void __iomem *base,
+		int len, unsigned short *buf)
+{
+	int i;
+
+	/* Set transfer length to 1 */
+	ATAPI_SET_XFER_LEN(base, 1);
+
+	/* Program the ATA_DEV_ADDR register with address of the
+	 * ATA_REG_DATA
+	 */
+	ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
+
+	/* Program the ATA_CTRL register with dir set to read (0) and
+	 */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
+
+	/* ensure PIO DMA is not set */
+	ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
+
+	for (i = 0; i < len; i++) {
+		/* and start the transfer */
+		ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
+
+		/* Wait for the interrupt to indicate the end of the transfer.
+		 * (PIO_DONE interrupt is set and it doesn't seem to matter
+		 * that we don't clear it)
+		 */
+		wait_complete(base, PIO_DONE_INT);
+
+		/* Read the ATA_DEV_RXBUF register with write data (to be
+		 * written into the device).
+		 */
+		buf[i] = ATAPI_GET_DEV_RXBUF(base);
+	}
+}
+
+/**
+ *	bfin_tf_load - send taskfile registers to host controller
+ *	@ap: Port to which output is sent
+ *	@tf: ATA taskfile register set
+ *
+ *	Note: Original code is ata_tf_load().
+ */
+
+static void bfin_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
+
+	if (tf->ctl != ap->last_ctl) {
+		write_atapi_register(base, ATA_REG_CTRL, tf->ctl);
+		ap->last_ctl = tf->ctl;
+		ata_wait_idle(ap);
+	}
+
+	if (is_addr) {
+		if (tf->flags & ATA_TFLAG_LBA48) {
+			write_atapi_register(base, ATA_REG_FEATURE,
+						tf->hob_feature);
+			write_atapi_register(base, ATA_REG_NSECT,
+						tf->hob_nsect);
+			write_atapi_register(base, ATA_REG_LBAL, tf->hob_lbal);
+			write_atapi_register(base, ATA_REG_LBAM, tf->hob_lbam);
+			write_atapi_register(base, ATA_REG_LBAH, tf->hob_lbah);
+			pr_debug("hob: feat 0x%X nsect 0x%X, lba 0x%X "
+				 "0x%X 0x%X\n",
+				tf->hob_feature,
+				tf->hob_nsect,
+				tf->hob_lbal,
+				tf->hob_lbam,
+				tf->hob_lbah);
+		}
+
+		write_atapi_register(base, ATA_REG_FEATURE, tf->feature);
+		write_atapi_register(base, ATA_REG_NSECT, tf->nsect);
+		write_atapi_register(base, ATA_REG_LBAL, tf->lbal);
+		write_atapi_register(base, ATA_REG_LBAM, tf->lbam);
+		write_atapi_register(base, ATA_REG_LBAH, tf->lbah);
+		pr_debug("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
+			tf->feature,
+			tf->nsect,
+			tf->lbal,
+			tf->lbam,
+			tf->lbah);
+	}
+
+	if (tf->flags & ATA_TFLAG_DEVICE) {
+		write_atapi_register(base, ATA_REG_DEVICE, tf->device);
+		pr_debug("device 0x%X\n", tf->device);
+	}
+
+	ata_wait_idle(ap);
+}
+
+/**
+ *	bfin_check_status - Read device status reg & clear interrupt
+ *	@ap: port where the device is
+ *
+ *	Note: Original code is ata_check_status().
+ */
+
+static u8 bfin_check_status(struct ata_port *ap)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	return read_atapi_register(base, ATA_REG_STATUS);
+}
+
+/**
+ *	bfin_tf_read - input device's ATA taskfile shadow registers
+ *	@ap: Port from which input is read
+ *	@tf: ATA taskfile register set for storing input
+ *
+ *	Note: Original code is ata_tf_read().
+ */
+
+static void bfin_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+
+	tf->command = bfin_check_status(ap);
+	tf->feature = read_atapi_register(base, ATA_REG_ERR);
+	tf->nsect = read_atapi_register(base, ATA_REG_NSECT);
+	tf->lbal = read_atapi_register(base, ATA_REG_LBAL);
+	tf->lbam = read_atapi_register(base, ATA_REG_LBAM);
+	tf->lbah = read_atapi_register(base, ATA_REG_LBAH);
+	tf->device = read_atapi_register(base, ATA_REG_DEVICE);
+
+	if (tf->flags & ATA_TFLAG_LBA48) {
+		write_atapi_register(base, ATA_REG_CTRL, tf->ctl | ATA_HOB);
+		tf->hob_feature = read_atapi_register(base, ATA_REG_ERR);
+		tf->hob_nsect = read_atapi_register(base, ATA_REG_NSECT);
+		tf->hob_lbal = read_atapi_register(base, ATA_REG_LBAL);
+		tf->hob_lbam = read_atapi_register(base, ATA_REG_LBAM);
+		tf->hob_lbah = read_atapi_register(base, ATA_REG_LBAH);
+	}
+}
+
+/**
+ *	bfin_exec_command - issue ATA command to host controller
+ *	@ap: port to which command is being issued
+ *	@tf: ATA taskfile register set
+ *
+ *	Note: Original code is ata_exec_command().
+ */
+
+static void bfin_exec_command(struct ata_port *ap,
+			      const struct ata_taskfile *tf)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	pr_debug("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
+
+	write_atapi_register(base, ATA_REG_CMD, tf->command);
+	ata_pause(ap);
+}
+
+/**
+ *	bfin_check_altstatus - Read device alternate status reg
+ *	@ap: port where the device is
+ */
+
+static u8 bfin_check_altstatus(struct ata_port *ap)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	return read_atapi_register(base, ATA_REG_ALTSTATUS);
+}
+
+/**
+ *	bfin_std_dev_select - Select device 0/1 on ATA bus
+ *	@ap: ATA channel to manipulate
+ *	@device: ATA device (numbered from zero) to select
+ *
+ *	Note: Original code is ata_std_dev_select().
+ */
+
+static void bfin_std_dev_select(struct ata_port *ap, unsigned int device)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	u8 tmp;
+
+	if (device == 0)
+		tmp = ATA_DEVICE_OBS;
+	else
+		tmp = ATA_DEVICE_OBS | ATA_DEV1;
+
+	write_atapi_register(base, ATA_REG_DEVICE, tmp);
+	ata_pause(ap);
+}
+
+/**
+ *	bfin_bmdma_setup - Set up IDE DMA transaction
+ *	@qc: Info associated with this ATA transaction.
+ *
+ *	Note: Original code is ata_bmdma_setup().
+ */
+
+static void bfin_bmdma_setup(struct ata_queued_cmd *qc)
+{
+	unsigned short config = WDSIZE_16;
+	struct scatterlist *sg;
+
+	pr_debug("in atapi dma setup\n");
+	/* Program the ATA_CTRL register with dir */
+	if (qc->tf.flags & ATA_TFLAG_WRITE) {
+		/* fill the ATAPI DMA controller */
+		set_dma_config(CH_ATAPI_TX, config);
+		set_dma_x_modify(CH_ATAPI_TX, 2);
+		ata_for_each_sg(sg, qc) {
+			set_dma_start_addr(CH_ATAPI_TX, sg_dma_address(sg));
+			set_dma_x_count(CH_ATAPI_TX, sg_dma_len(sg) >> 1);
+		}
+	} else {
+		config |= WNR;
+		/* fill the ATAPI DMA controller */
+		set_dma_config(CH_ATAPI_RX, config);
+		set_dma_x_modify(CH_ATAPI_RX, 2);
+		ata_for_each_sg(sg, qc) {
+			set_dma_start_addr(CH_ATAPI_RX, sg_dma_address(sg));
+			set_dma_x_count(CH_ATAPI_RX, sg_dma_len(sg) >> 1);
+		}
+	}
+}
+
+/**
+ *	bfin_bmdma_start - Start an IDE DMA transaction
+ *	@qc: Info associated with this ATA transaction.
+ *
+ *	Note: Original code is ata_bmdma_start().
+ */
+
+static void bfin_bmdma_start(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	struct scatterlist *sg;
+
+	pr_debug("in atapi dma start\n");
+	if (!(ap->udma_mask || ap->mwdma_mask))
+		return;
+
+	/* start ATAPI DMA controller*/
+	if (qc->tf.flags & ATA_TFLAG_WRITE) {
+		/*
+		 * On blackfin arch, uncacheable memory is not
+		 * allocated with flag GFP_DMA. DMA buffer from
+		 * common kenel code should be flushed if WB
+		 * data cache is enabled. Otherwise, this loop
+		 * is an empty loop and optimized out.
+		 */
+		ata_for_each_sg(sg, qc) {
+			flush_dcache_range(sg_dma_address(sg),
+				sg_dma_address(sg) + sg_dma_len(sg));
+		}
+		enable_dma(CH_ATAPI_TX);
+		pr_debug("enable udma write\n");
+
+		/* Send ATA DMA write command */
+		bfin_exec_command(ap, &qc->tf);
+
+		/* set ATA DMA write direction */
+		ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
+			| XFER_DIR));
+	} else {
+		enable_dma(CH_ATAPI_RX);
+		pr_debug("enable udma read\n");
+
+		/* Send ATA DMA read command */
+		bfin_exec_command(ap, &qc->tf);
+
+		/* set ATA DMA read direction */
+		ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
+			& ~XFER_DIR));
+	}
+
+	/* Reset all transfer count */
+	ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | TFRCNT_RST);
+
+		/* Set transfer length to buffer len */
+	ata_for_each_sg(sg, qc) {
+		ATAPI_SET_XFER_LEN(base, (sg_dma_len(sg) >> 1));
+	}
+
+	/* Enable ATA DMA operation*/
+	if (ap->udma_mask)
+		ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
+			| ULTRA_START);
+	else
+		ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
+			| MULTI_START);
+}
+
+/**
+ *	bfin_bmdma_stop - Stop IDE DMA transfer
+ *	@qc: Command we are ending DMA for
+ */
+
+static void bfin_bmdma_stop(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct scatterlist *sg;
+
+	pr_debug("in atapi dma stop\n");
+	if (!(ap->udma_mask || ap->mwdma_mask))
+		return;
+
+	/* stop ATAPI DMA controller*/
+	if (qc->tf.flags & ATA_TFLAG_WRITE)
+		disable_dma(CH_ATAPI_TX);
+	else {
+		disable_dma(CH_ATAPI_RX);
+		if (ap->hsm_task_state & HSM_ST_LAST) {
+			/*
+			 * On blackfin arch, uncacheable memory is not
+			 * allocated with flag GFP_DMA. DMA buffer from
+			 * common kenel code should be invalidated if
+			 * data cache is enabled. Otherwise, this loop
+			 * is an empty loop and optimized out.
+			 */
+			ata_for_each_sg(sg, qc) {
+				invalidate_dcache_range(
+					sg_dma_address(sg),
+					sg_dma_address(sg)
+					+ sg_dma_len(sg));
+			}
+		}
+	}
+}
+
+/**
+ *	bfin_devchk - PATA device presence detection
+ *	@ap: ATA channel to examine
+ *	@device: Device to examine (starting at zero)
+ *
+ *	Note: Original code is ata_devchk().
+ */
+
+static unsigned int bfin_devchk(struct ata_port *ap,
+				unsigned int device)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	u8 nsect, lbal;
+
+	bfin_std_dev_select(ap, device);
+
+	write_atapi_register(base, ATA_REG_NSECT, 0x55);
+	write_atapi_register(base, ATA_REG_LBAL, 0xaa);
+
+	write_atapi_register(base, ATA_REG_NSECT, 0xaa);
+	write_atapi_register(base, ATA_REG_LBAL, 0x55);
+
+	write_atapi_register(base, ATA_REG_NSECT, 0x55);
+	write_atapi_register(base, ATA_REG_LBAL, 0xaa);
+
+	nsect = read_atapi_register(base, ATA_REG_NSECT);
+	lbal = read_atapi_register(base, ATA_REG_LBAL);
+
+	if ((nsect == 0x55) && (lbal == 0xaa))
+		return 1;	/* we found a device */
+
+	return 0;		/* nothing found */
+}
+
+/**
+ *	bfin_bus_post_reset - PATA device post reset
+ *
+ *	Note: Original code is ata_bus_post_reset().
+ */
+
+static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	unsigned int dev0 = devmask & (1 << 0);
+	unsigned int dev1 = devmask & (1 << 1);
+	unsigned long timeout;
+
+	/* if device 0 was found in ata_devchk, wait for its
+	 * BSY bit to clear
+	 */
+	if (dev0)
+		ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
+
+	/* if device 1 was found in ata_devchk, wait for
+	 * register access, then wait for BSY to clear
+	 */
+	timeout = jiffies + ATA_TMOUT_BOOT;
+	while (dev1) {
+		u8 nsect, lbal;
+
+		bfin_std_dev_select(ap, 1);
+		nsect = read_atapi_register(base, ATA_REG_NSECT);
+		lbal = read_atapi_register(base, ATA_REG_LBAL);
+		if ((nsect == 1) && (lbal == 1))
+			break;
+		if (time_after(jiffies, timeout)) {
+			dev1 = 0;
+			break;
+		}
+		msleep(50);	/* give drive a breather */
+	}
+	if (dev1)
+		ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
+
+	/* is all this really necessary? */
+	bfin_std_dev_select(ap, 0);
+	if (dev1)
+		bfin_std_dev_select(ap, 1);
+	if (dev0)
+		bfin_std_dev_select(ap, 0);
+}
+
+/**
+ *	bfin_bus_softreset - PATA device software reset
+ *
+ *	Note: Original code is ata_bus_softreset().
+ */
+
+static unsigned int bfin_bus_softreset(struct ata_port *ap,
+				       unsigned int devmask)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+
+	/* software reset.  causes dev0 to be selected */
+	write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
+	udelay(20);
+	write_atapi_register(base, ATA_REG_CTRL, ap->ctl | ATA_SRST);
+	udelay(20);
+	write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
+
+	/* spec mandates ">= 2ms" before checking status.
+	 * We wait 150ms, because that was the magic delay used for
+	 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
+	 * between when the ATA command register is written, and then
+	 * status is checked.  Because waiting for "a while" before
+	 * checking status is fine, post SRST, we perform this magic
+	 * delay here as well.
+	 *
+	 * Old drivers/ide uses the 2mS rule and then waits for ready
+	 */
+	msleep(150);
+
+	/* Before we perform post reset processing we want to see if
+	 * the bus shows 0xFF because the odd clown forgets the D7
+	 * pulldown resistor.
+	 */
+	if (bfin_check_status(ap) == 0xFF)
+		return 0;
+
+	bfin_bus_post_reset(ap, devmask);
+
+	return 0;
+}
+
+/**
+ *	bfin_std_softreset - reset host port via ATA SRST
+ *	@ap: port to reset
+ *	@classes: resulting classes of attached devices
+ *
+ *	Note: Original code is ata_std_softreset().
+ */
+
+static int bfin_std_softreset(struct ata_port *ap, unsigned int *classes,
+		unsigned long deadline)
+{
+	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
+	unsigned int devmask = 0, err_mask;
+	u8 err;
+
+	if (ata_port_offline(ap)) {
+		classes[0] = ATA_DEV_NONE;
+		goto out;
+	}
+
+	/* determine if device 0/1 are present */
+	if (bfin_devchk(ap, 0))
+		devmask |= (1 << 0);
+	if (slave_possible && bfin_devchk(ap, 1))
+		devmask |= (1 << 1);
+
+	/* select device 0 again */
+	bfin_std_dev_select(ap, 0);
+
+	/* issue bus reset */
+	err_mask = bfin_bus_softreset(ap, devmask);
+	if (err_mask) {
+		ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
+				err_mask);
+		return -EIO;
+	}
+
+	/* determine by signature whether we have ATA or ATAPI devices */
+	classes[0] = ata_dev_try_classify(ap, 0, &err);
+	if (slave_possible && err != 0x81)
+		classes[1] = ata_dev_try_classify(ap, 1, &err);
+
+ out:
+	return 0;
+}
+
+/**
+ *	bfin_bmdma_status - Read IDE DMA status
+ *	@ap: Port associated with this ATA transaction.
+ */
+
+static unsigned char bfin_bmdma_status(struct ata_port *ap)
+{
+	unsigned char host_stat = 0;
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	unsigned short int_status = ATAPI_GET_INT_STATUS(base);
+
+	if (ATAPI_GET_STATUS(base) & (MULTI_XFER_ON|ULTRA_XFER_ON)) {
+		host_stat = ATA_DMA_ACTIVE;
+	}
+	if (int_status & (MULTI_DONE_INT|UDMAIN_DONE_INT|UDMAOUT_DONE_INT)) {
+		host_stat = ATA_DMA_INTR;
+	}
+	if (int_status & (MULTI_TERM_INT|UDMAIN_TERM_INT|UDMAOUT_TERM_INT)) {
+		host_stat = ATA_DMA_ERR;
+	}
+
+	return host_stat;
+}
+
+/**
+ *	bfin_data_xfer - Transfer data by PIO
+ *	@adev: device for this I/O
+ *	@buf: data buffer
+ *	@buflen: buffer length
+ *	@write_data: read/write
+ *
+ *	Note: Original code is ata_data_xfer().
+ */
+
+static void bfin_data_xfer(struct ata_device *adev, unsigned char *buf,
+			   unsigned int buflen, int write_data)
+{
+	struct ata_port *ap = adev->ap;
+	unsigned int words = buflen >> 1;
+	unsigned short *buf16 = (u16 *) buf;
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+
+	/* Transfer multiple of 2 bytes */
+	if (write_data) {
+		write_atapi_data(base, words, buf16);
+	} else {
+		read_atapi_data(base, words, buf16);
+	}
+
+	/* Transfer trailing 1 byte, if any. */
+	if (unlikely(buflen & 0x01)) {
+		unsigned short align_buf[1] = { 0 };
+		unsigned char *trailing_buf = buf + buflen - 1;
+
+		if (write_data) {
+			memcpy(align_buf, trailing_buf, 1);
+			write_atapi_data(base, 1, align_buf);
+		} else {
+			read_atapi_data(base, 1, align_buf);
+			memcpy(trailing_buf, align_buf, 1);
+		}
+	}
+}
+
+/**
+ *	bfin_irq_clear - Clear ATAPI interrupt.
+ *	@ap: Port associated with this ATA transaction.
+ *
+ *	Note: Original code is ata_bmdma_irq_clear().
+ */
+
+static void bfin_irq_clear(struct ata_port *ap)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+
+	pr_debug("in atapi irq clear\n");
+	ATAPI_SET_INT_STATUS(base, 0x1FF);
+}
+
+/**
+ *	bfin_irq_on - Enable interrupts on a port.
+ *	@ap: Port on which interrupts are enabled.
+ *
+ *	Note: Original code is ata_irq_on().
+ */
+
+static unsigned char bfin_irq_on(struct ata_port *ap)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	u8 tmp;
+
+	pr_debug("in atapi irq on\n");
+	ap->ctl &= ~ATA_NIEN;
+	ap->last_ctl = ap->ctl;
+
+	write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
+	tmp = ata_wait_idle(ap);
+
+	bfin_irq_clear(ap);
+
+	return tmp;
+}
+
+/**
+ *	bfin_irq_ack - Acknowledge a device interrupt.
+ *	@ap: Port on which interrupts are enabled.
+ *
+ *	Note: Original code is ata_irq_ack().
+ */
+
+static unsigned char bfin_irq_ack(struct ata_port *ap, unsigned int chk_drq)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+	unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
+	unsigned char status;
+
+	pr_debug("in atapi irq ack\n");
+	status = ata_busy_wait(ap, bits, 1000);
+	if (status & bits)
+		if (ata_msg_err(ap))
+			dev_err(ap->dev, "abnormal status 0x%X\n", status);
+
+	/* get controller status; clear intr, err bits */
+	ATAPI_SET_INT_STATUS(base, ATAPI_GET_INT_STATUS(base)|ATAPI_DEV_INT
+		| MULTI_DONE_INT | UDMAIN_DONE_INT | UDMAOUT_DONE_INT
+		| MULTI_TERM_INT | UDMAIN_TERM_INT | UDMAOUT_TERM_INT);
+
+	return bfin_bmdma_status(ap);
+}
+
+/**
+ *	bfin_bmdma_freeze - Freeze DMA controller port
+ *	@ap: port to freeze
+ *
+ *	Note: Original code is ata_bmdma_freeze().
+ */
+
+static void bfin_bmdma_freeze(struct ata_port *ap)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+
+	pr_debug("in atapi dma freeze\n");
+	ap->ctl |= ATA_NIEN;
+	ap->last_ctl = ap->ctl;
+
+	write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
+
+	/* Under certain circumstances, some controllers raise IRQ on
+	 * ATA_NIEN manipulation.  Also, many controllers fail to mask
+	 * previously pending IRQ on ATA_NIEN assertion.  Clear it.
+	 */
+	ata_chk_status(ap);
+
+	bfin_irq_clear(ap);
+}
+
+/**
+ *	bfin_bmdma_thaw - Thaw DMA controller port
+ *	@ap: port to thaw
+ *
+ *	Note: Original code is ata_bmdma_thaw().
+ */
+
+void bfin_bmdma_thaw(struct ata_port *ap)
+{
+	bfin_check_status(ap);
+	bfin_irq_clear(ap);
+	bfin_irq_on(ap);
+}
+
+/**
+ *	bfin_std_postreset - standard postreset callback
+ *	@ap: the target ata_port
+ *	@classes: classes of attached devices
+ *
+ *	Note: Original code is ata_std_postreset().
+ */
+
+static void bfin_std_postreset(struct ata_port *ap, unsigned int *classes)
+{
+	void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
+
+	/* re-enable interrupts */
+	bfin_irq_on(ap);
+
+	/* is double-select really necessary? */
+	if (classes[0] != ATA_DEV_NONE)
+		bfin_std_dev_select(ap, 1);
+	if (classes[1] != ATA_DEV_NONE)
+		bfin_std_dev_select(ap, 0);
+
+	/* bail out if no device is present */
+	if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
+		return;
+	}
+
+	/* set up device control */
+	write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
+}
+
+/**
+ *	bfin_error_handler - Stock error handler for DMA controller
+ *	@ap: port to handle error for
+ */
+
+static void bfin_error_handler(struct ata_port *ap)
+{
+	ata_bmdma_drive_eh(ap, ata_std_prereset, bfin_std_softreset, NULL,
+			   bfin_std_postreset);
+}
+
+static void bfin_port_stop(struct ata_port *ap)
+{
+	pr_debug("in atapi port stop\n");
+	if (ap->udma_mask != 0 || ap->mwdma_mask != 0) {
+		free_dma(CH_ATAPI_RX);
+		free_dma(CH_ATAPI_TX);
+	}
+}
+
+static int bfin_port_start(struct ata_port *ap)
+{
+	pr_debug("in atapi port start\n");
+	if (!(ap->udma_mask || ap->mwdma_mask))
+		return 0;
+
+	if (request_dma(CH_ATAPI_RX, "BFIN ATAPI RX DMA") >= 0) {
+		if (request_dma(CH_ATAPI_TX,
+			"BFIN ATAPI TX DMA") >= 0)
+			return 0;
+
+		free_dma(CH_ATAPI_RX);
+	}
+
+	ap->udma_mask = 0;
+	ap->mwdma_mask = 0;
+	dev_err(ap->dev, "Unable to request ATAPI DMA!"
+		" Continue in PIO mode.\n");
+
+	return 0;
+}
+
+static struct scsi_host_template bfin_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= SG_NONE,
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
+	.emulated		= ATA_SHT_EMULATED,
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,
+	.proc_name		= DRV_NAME,
+	.dma_boundary		= ATA_DMA_BOUNDARY,
+	.slave_configure	= ata_scsi_slave_config,
+	.slave_destroy		= ata_scsi_slave_destroy,
+	.bios_param		= ata_std_bios_param,
+#ifdef CONFIG_PM
+	.resume			= ata_scsi_device_resume,
+	.suspend		= ata_scsi_device_suspend,
+#endif
+};
+
+static const struct ata_port_operations bfin_pata_ops = {
+	.port_disable		= ata_port_disable,
+	.set_piomode		= bfin_set_piomode,
+	.set_dmamode		= bfin_set_dmamode,
+
+	.tf_load		= bfin_tf_load,
+	.tf_read		= bfin_tf_read,
+	.exec_command		= bfin_exec_command,
+	.check_status		= bfin_check_status,
+	.check_altstatus	= bfin_check_altstatus,
+	.dev_select		= bfin_std_dev_select,
+
+	.bmdma_setup		= bfin_bmdma_setup,
+	.bmdma_start		= bfin_bmdma_start,
+	.bmdma_stop		= bfin_bmdma_stop,
+	.bmdma_status		= bfin_bmdma_status,
+	.data_xfer		= bfin_data_xfer,
+
+	.qc_prep		= ata_noop_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+
+	.freeze			= bfin_bmdma_freeze,
+	.thaw			= bfin_bmdma_thaw,
+	.error_handler		= bfin_error_handler,
+	.post_internal_cmd	= bfin_bmdma_stop,
+
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= bfin_irq_clear,
+	.irq_on			= bfin_irq_on,
+	.irq_ack		= bfin_irq_ack,
+
+	.port_start		= bfin_port_start,
+	.port_stop		= bfin_port_stop,
+};
+
+static struct ata_port_info bfin_port_info[] = {
+	{
+		.sht		= &bfin_sht,
+		.flags		= ATA_FLAG_SLAVE_POSS
+				| ATA_FLAG_MMIO
+				| ATA_FLAG_NO_LEGACY,
+		.pio_mask	= 0x1f,	/* pio0-4 */
+		.mwdma_mask	= 0,
+#ifdef CONFIG_PATA_BF54X_DMA
+		.udma_mask	= ATA_UDMA5,
+#else
+		.udma_mask	= 0,
+#endif
+		.port_ops	= &bfin_pata_ops,
+	},
+};
+
+/**
+ *	bfin_reset_controller - initialize BF54x ATAPI controller.
+ */
+
+static int bfin_reset_controller(struct ata_host *host)
+{
+	void __iomem *base = (void __iomem *)host->ports[0]->ioaddr.ctl_addr;
+	int count;
+	unsigned short status;
+
+	/* Disable all ATAPI interrupts */
+	ATAPI_SET_INT_MASK(base, 0);
+	SSYNC();
+
+	/* Assert the RESET signal 25us*/
+	ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | DEV_RST);
+	udelay(30);
+
+	/* Negate the RESET signal for 2ms*/
+	ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) & ~DEV_RST);
+	msleep(2);
+
+	/* Wait on Busy flag to clear */
+	count = 10000000;
+	do {
+		status = read_atapi_register(base, ATA_REG_STATUS);
+	} while (count-- && (status & ATA_BUSY));
+
+	/* Enable only ATAPI Device interrupt */
+	ATAPI_SET_INT_MASK(base, 1);
+	SSYNC();
+
+	return (!count);
+}
+
+/**
+ *	atapi_io_port - define atapi peripheral port pins.
+ */
+static unsigned short atapi_io_port[] = {
+	P_ATAPI_RESET,
+	P_ATAPI_DIOR,
+	P_ATAPI_DIOW,
+	P_ATAPI_CS0,
+	P_ATAPI_CS1,
+	P_ATAPI_DMACK,
+	P_ATAPI_DMARQ,
+	P_ATAPI_INTRQ,
+	P_ATAPI_IORDY,
+	0
+};
+
+/**
+ *	bfin_atapi_probe	-	attach a bfin atapi interface
+ *	@pdev: platform device
+ *
+ *	Register a bfin atapi interface.
+ *
+ *
+ *	Platform devices are expected to contain 2 resources per port:
+ *
+ *		- I/O Base (IORESOURCE_IO)
+ *		- IRQ	   (IORESOURCE_IRQ)
+ *
+ */
+static int __devinit bfin_atapi_probe(struct platform_device *pdev)
+{
+	int board_idx = 0;
+	struct resource *res;
+	struct ata_host *host;
+	const struct ata_port_info *ppi[] =
+		{ &bfin_port_info[board_idx], NULL };
+
+	/*
+	 * Simple resource validation ..
+	 */
+	if (unlikely(pdev->num_resources != 2)) {
+		dev_err(&pdev->dev, "invalid number of resources\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Get the register base first
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res == NULL)
+		return -EINVAL;
+
+	/*
+	 * Now that that's out of the way, wire up the port..
+	 */
+	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1);
+	if (!host)
+		return -ENOMEM;
+
+	host->ports[0]->ioaddr.ctl_addr = (void *)res->start;
+
+	if (peripheral_request_list(atapi_io_port, "atapi-io-port")) {
+		dev_err(&pdev->dev, "Requesting Peripherals faild\n");
+		return -EFAULT;
+	}
+
+	if (bfin_reset_controller(host)) {
+		peripheral_free_list(atapi_io_port);
+		dev_err(&pdev->dev, "Fail to reset ATAPI device\n");
+		return -EFAULT;
+	}
+
+	if (ata_host_activate(host, platform_get_irq(pdev, 0),
+		ata_interrupt, IRQF_SHARED, &bfin_sht) != 0) {
+		peripheral_free_list(atapi_io_port);
+		dev_err(&pdev->dev, "Fail to attach ATAPI device\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+/**
+ *	bfin_atapi_remove	-	unplug a bfin atapi interface
+ *	@pdev: platform device
+ *
+ *	A bfin atapi device has been unplugged. Perform the needed
+ *	cleanup. Also called on module unload for any active devices.
+ */
+static int __devexit bfin_atapi_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct ata_host *host = dev_get_drvdata(dev);
+
+	ata_host_detach(host);
+
+	peripheral_free_list(atapi_io_port);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	return 0;
+}
+
+int bfin_atapi_resume(struct platform_device *pdev)
+{
+	return 0;
+}
+#endif
+
+static struct platform_driver bfin_atapi_driver = {
+	.probe			= bfin_atapi_probe,
+	.remove			= __devexit_p(bfin_atapi_remove),
+	.driver = {
+		.name		= DRV_NAME,
+		.owner		= THIS_MODULE,
+#ifdef CONFIG_PM
+		.suspend	= bfin_atapi_suspend,
+		.resume		= bfin_atapi_resume,
+#endif
+	},
+};
+
+static int __init bfin_atapi_init(void)
+{
+	pr_info("register bfin atapi driver\n");
+	return platform_driver_register(&bfin_atapi_driver);
+}
+
+static void __exit bfin_atapi_exit(void)
+{
+	platform_driver_unregister(&bfin_atapi_driver);
+}
+
+module_init(bfin_atapi_init);
+module_exit(bfin_atapi_exit);
+
+MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
+MODULE_DESCRIPTION("PATA driver for blackfin 54x ATAPI controller");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
-- 
cgit v1.2.3-70-g09d2


From 7c9ef8e418374aec0a62e64d9b40d457634fd039 Mon Sep 17 00:00:00 2001
From: Kristoffer Nyborg Gregertsen <kngregertsen@norway.atmel.com>
Date: Wed, 8 Aug 2007 16:57:08 +0200
Subject: AVR32 PATA driver

Updated and simplified driver. Use only register transfer timing for both
data and register transfers. This gives poorer performance in PIO1 and 2,
but should not be a problem in PIO3 and 4, correct me if I'm wrong :)

The driver works very we'll but I still wonder about the interrupts. I have
an interrupt line, that works nicely when POLLING flag is not set. The
problem is the number of interrupts that eat away my CPU cycles.

When using the POLLING flag there seem to be some interrupts that dosen't get
cleared. Furthermore the device dosen't drive INTRQ high, it stays at 2.5 volts
and generates a lot of interrupts due to ripple / noise. What to do?

Signed-off-by: Kristoffer Nyborg Gregertsen <kngregertsen@norway.atmel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/Kconfig     |   9 +
 drivers/ata/Makefile    |   1 +
 drivers/ata/pata_at32.c | 441 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 451 insertions(+)
 create mode 100644 drivers/ata/pata_at32.c

(limited to 'drivers/ata')

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index a427945f0bb..2cd0e747671 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -199,6 +199,15 @@ config PATA_ARTOP
 
 	  If unsure, say N.
 
+config PATA_AT32
+	tristate "Atmel AVR32 PATA support (Experimental)"
+	depends on AVR32 && PLATFORM_AT32AP && EXPERIMENTAL
+	help
+	  This option enables support for the IDE devices on the
+	  Atmel AT32AP platform.
+
+	  If unsure, say N.
+
 config PATA_ATIIXP
 	tristate "ATI PATA support (Experimental)"
 	depends on PCI && EXPERIMENTAL
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index c2ecba5f0b4..4eb7fb44be3 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_PDC_ADMA)		+= pdc_adma.o
 obj-$(CONFIG_PATA_ALI)		+= pata_ali.o
 obj-$(CONFIG_PATA_AMD)		+= pata_amd.o
 obj-$(CONFIG_PATA_ARTOP)	+= pata_artop.o
+obj-$(CONFIG_PATA_AT32)		+= pata_at32.o
 obj-$(CONFIG_PATA_ATIIXP)	+= pata_atiixp.o
 obj-$(CONFIG_PATA_CMD640_PCI)	+= pata_cmd640.o
 obj-$(CONFIG_PATA_CMD64X)	+= pata_cmd64x.o
diff --git a/drivers/ata/pata_at32.c b/drivers/ata/pata_at32.c
new file mode 100644
index 00000000000..bb250a48e27
--- /dev/null
+++ b/drivers/ata/pata_at32.c
@@ -0,0 +1,441 @@
+/*
+ * AVR32 SMC/CFC PATA Driver
+ *
+ * Copyright (C) 2007 Atmel Norway
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ */
+
+#define DEBUG
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <scsi/scsi_host.h>
+#include <linux/ata.h>
+#include <linux/libata.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <asm/arch/board.h>
+#include <asm/arch/smc.h>
+
+#define DRV_NAME "pata_at32"
+#define DRV_VERSION "0.0.2"
+
+/*
+ * CompactFlash controller memory layout relative to the base address:
+ *
+ *	Attribute memory:  0000 0000 -> 003f ffff
+ *	Common memory:	   0040 0000 -> 007f ffff
+ *	I/O memory:	   0080 0000 -> 00bf ffff
+ *	True IDE Mode:	   00c0 0000 -> 00df ffff
+ *	Alt IDE Mode:	   00e0 0000 -> 00ff ffff
+ *
+ * Only True IDE and Alt True IDE mode are needed for this driver.
+ *
+ *	True IDE mode	  => CS0 = 0, CS1 = 1 (cmd, error, stat, etc)
+ *	Alt True IDE mode => CS0 = 1, CS1 = 0 (ctl, alt_stat)
+ */
+#define CF_IDE_OFFSET	  0x00c00000
+#define CF_ALT_IDE_OFFSET 0x00e00000
+#define CF_RES_SIZE	  2048
+
+/*
+ * Define DEBUG_BUS if you are doing debugging of your own EBI -> PATA
+ * adaptor with a logic analyzer or similar.
+ */
+#undef DEBUG_BUS
+
+/*
+ * ATA PIO modes
+ *
+ *	Name	| Mb/s	| Min cycle time | Mask
+ *	--------+-------+----------------+--------
+ *	Mode 0	| 3.3	| 600 ns	 | 0x01
+ *	Mode 1	| 5.2	| 383 ns	 | 0x03
+ *	Mode 2	| 8.3	| 240 ns	 | 0x07
+ *	Mode 3	| 11.1	| 180 ns	 | 0x0f
+ *	Mode 4	| 16.7	| 120 ns	 | 0x1f
+ */
+#define PIO_MASK (0x1f)
+
+/*
+ * Struct containing private information about device.
+ */
+struct at32_ide_info {
+	unsigned int		irq;
+	struct resource		res_ide;
+	struct resource		res_alt;
+	void __iomem		*ide_addr;
+	void __iomem		*alt_addr;
+	unsigned int		cs;
+	struct smc_config	smc;
+};
+
+/*
+ * Setup SMC for the given ATA timing.
+ */
+static int pata_at32_setup_timing(struct device *dev,
+				  struct at32_ide_info *info,
+				  const struct ata_timing *timing)
+{
+	/* These two values are found through testing */
+	const int min_recover = 25;
+	const int ncs_hold    = 15;
+
+	struct smc_config *smc = &info->smc;
+
+	int active;
+	int recover;
+
+	/* Total cycle time */
+	smc->read_cycle	= timing->cyc8b;
+
+	/* DIOR <= CFIOR timings */
+	smc->nrd_setup = timing->setup;
+	smc->nrd_pulse = timing->act8b;
+
+	/* Compute recover, extend total cycle if needed */
+	active	= smc->nrd_setup + smc->nrd_pulse;
+	recover = smc->read_cycle - active;
+
+	if (recover < min_recover) {
+		smc->read_cycle = active + min_recover;
+		recover = min_recover;
+	}
+
+	/* (CS0, CS1, DIR, OE) <= (CFCE1, CFCE2, CFRNW, NCSX) timings */
+	smc->ncs_read_setup  = 0;
+	smc->ncs_read_pulse  = active + ncs_hold;
+
+	/* Write timings same as read timings */
+	smc->write_cycle = smc->read_cycle;
+	smc->nwe_setup = smc->nrd_setup;
+	smc->nwe_pulse = smc->nrd_pulse;
+	smc->ncs_write_setup = smc->ncs_read_setup;
+	smc->ncs_write_pulse = smc->ncs_read_pulse;
+
+	/* Do some debugging output */
+	dev_dbg(dev, "SMC: C=%d S=%d P=%d R=%d NCSS=%d NCSP=%d NCSR=%d\n",
+		smc->read_cycle, smc->nrd_setup, smc->nrd_pulse,
+		recover, smc->ncs_read_setup, smc->ncs_read_pulse,
+		smc->read_cycle - smc->ncs_read_pulse);
+
+	/* Finally, configure the SMC */
+	return smc_set_configuration(info->cs, smc);
+}
+
+/*
+ * Procedures for libATA.
+ */
+static void pata_at32_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct ata_timing timing;
+	struct at32_ide_info *info = ap->host->private_data;
+
+	int ret;
+
+	/* Compute ATA timing */
+	ret = ata_timing_compute(adev, adev->pio_mode, &timing, 1000, 0);
+	if (ret) {
+		dev_warn(ap->dev, "Failed to compute ATA timing %d\n", ret);
+		return;
+	}
+
+	/* Setup SMC to ATA timing */
+	ret = pata_at32_setup_timing(ap->dev, info, &timing);
+	if (ret) {
+		dev_warn(ap->dev, "Failed to setup ATA timing %d\n", ret);
+		return;
+	}
+}
+
+static void pata_at32_irq_clear(struct ata_port *ap)
+{
+	/* No DMA controller yet */
+}
+
+static struct scsi_host_template at32_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= LIBATA_MAX_PRD,
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
+	.emulated		= ATA_SHT_EMULATED,
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,
+	.proc_name		= DRV_NAME,
+	.dma_boundary		= ATA_DMA_BOUNDARY,
+	.slave_configure	= ata_scsi_slave_config,
+	.slave_destroy		= ata_scsi_slave_destroy,
+	.bios_param		= ata_std_bios_param,
+};
+
+static struct ata_port_operations at32_port_ops = {
+	.port_disable		= ata_port_disable,
+	.set_piomode		= pata_at32_set_piomode,
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.exec_command		= ata_exec_command,
+	.check_status		= ata_check_status,
+	.dev_select		= ata_std_dev_select,
+
+	.freeze			= ata_bmdma_freeze,
+	.thaw			= ata_bmdma_thaw,
+	.error_handler		= ata_bmdma_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+	.cable_detect		= ata_cable_40wire,
+
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+
+	.data_xfer		= ata_data_xfer,
+
+	.irq_clear		= pata_at32_irq_clear,
+	.irq_on			= ata_irq_on,
+	.irq_ack		= ata_irq_ack,
+
+	.port_start		= ata_sff_port_start,
+};
+
+static int __init pata_at32_init_one(struct device *dev,
+				     struct at32_ide_info *info)
+{
+	struct ata_host *host;
+	struct ata_port *ap;
+
+	host = ata_host_alloc(dev, 1);
+	if (!host)
+		return -ENOMEM;
+
+	ap = host->ports[0];
+
+	/* Setup ATA bindings */
+	ap->ops	     = &at32_port_ops;
+	ap->pio_mask = PIO_MASK;
+	ap->flags    = ATA_FLAG_MMIO | ATA_FLAG_SLAVE_POSS
+		| ATA_FLAG_PIO_POLLING;
+
+	/*
+	 * Since all 8-bit taskfile transfers has to go on the lower
+	 * byte of the data bus and there is a bug in the SMC that
+	 * makes it impossible to alter the bus width during runtime,
+	 * we need to hardwire the address signals as follows:
+	 *
+	 *	A_IDE(2:0) <= A_EBI(3:1)
+	 *
+	 * This makes all addresses on the EBI even, thus all data
+	 * will be on the lower byte of the data bus.  All addresses
+	 * used by libATA need to be altered according to this.
+	 */
+	ap->ioaddr.altstatus_addr = info->alt_addr + (0x06 << 1);
+	ap->ioaddr.ctl_addr	  = info->alt_addr + (0x06 << 1);
+
+	ap->ioaddr.data_addr	  = info->ide_addr + (ATA_REG_DATA << 1);
+	ap->ioaddr.error_addr	  = info->ide_addr + (ATA_REG_ERR << 1);
+	ap->ioaddr.feature_addr	  = info->ide_addr + (ATA_REG_FEATURE << 1);
+	ap->ioaddr.nsect_addr	  = info->ide_addr + (ATA_REG_NSECT << 1);
+	ap->ioaddr.lbal_addr	  = info->ide_addr + (ATA_REG_LBAL << 1);
+	ap->ioaddr.lbam_addr	  = info->ide_addr + (ATA_REG_LBAM << 1);
+	ap->ioaddr.lbah_addr	  = info->ide_addr + (ATA_REG_LBAH << 1);
+	ap->ioaddr.device_addr	  = info->ide_addr + (ATA_REG_DEVICE << 1);
+	ap->ioaddr.status_addr	  = info->ide_addr + (ATA_REG_STATUS << 1);
+	ap->ioaddr.command_addr	  = info->ide_addr + (ATA_REG_CMD << 1);
+
+	/* Set info as private data of ATA host */
+	host->private_data = info;
+
+	/* Register ATA device and return */
+	return ata_host_activate(host, info->irq, ata_interrupt,
+				 IRQF_SHARED | IRQF_TRIGGER_RISING,
+				 &at32_sht);
+}
+
+/*
+ * This function may come in handy for people analyzing their own
+ * EBI -> PATA adaptors.
+ */
+#ifdef DEBUG_BUS
+
+static void __init pata_at32_debug_bus(struct device *dev,
+				       struct at32_ide_info *info)
+{
+	const int d1 = 0xff;
+	const int d2 = 0x00;
+
+	int i;
+
+	/* Write 8-bit values (registers) */
+	iowrite8(d1, info->alt_addr + (0x06 << 1));
+	iowrite8(d2, info->alt_addr + (0x06 << 1));
+
+	for (i = 0; i < 8; i++) {
+		iowrite8(d1, info->ide_addr + (i << 1));
+		iowrite8(d2, info->ide_addr + (i << 1));
+	}
+
+	/* Write 16 bit values (data) */
+	iowrite16(d1,	   info->ide_addr);
+	iowrite16(d1 << 8, info->ide_addr);
+
+	iowrite16(d1,	   info->ide_addr);
+	iowrite16(d1 << 8, info->ide_addr);
+}
+
+#endif
+
+static int __init pata_at32_probe(struct platform_device *pdev)
+{
+	const struct ata_timing initial_timing =
+		{XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0};
+
+	struct device		 *dev = &pdev->dev;
+	struct at32_ide_info	 *info;
+	struct ide_platform_data *board = pdev->dev.platform_data;
+	struct resource		 *res;
+
+	int irq;
+	int ret;
+
+	if (!board)
+		return -ENXIO;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENXIO;
+
+	/* Retrive IRQ */
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	/* Setup struct containing private infomation */
+	info = kzalloc(sizeof(struct at32_ide_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	memset(info, 0, sizeof(struct at32_ide_info));
+
+	info->irq = irq;
+	info->cs  = board->cs;
+
+	/* Request memory resources */
+	info->res_ide.start = res->start + CF_IDE_OFFSET;
+	info->res_ide.end   = info->res_ide.start + CF_RES_SIZE - 1;
+	info->res_ide.name  = "ide";
+	info->res_ide.flags = IORESOURCE_MEM;
+
+	ret = request_resource(res, &info->res_ide);
+	if (ret)
+		goto err_req_res_ide;
+
+	info->res_alt.start = res->start + CF_ALT_IDE_OFFSET;
+	info->res_alt.end   = info->res_alt.start + CF_RES_SIZE - 1;
+	info->res_alt.name  = "alt";
+	info->res_alt.flags = IORESOURCE_MEM;
+
+	ret = request_resource(res, &info->res_alt);
+	if (ret)
+		goto err_req_res_alt;
+
+	/* Setup non-timing elements of SMC */
+	info->smc.bus_width	 = 2; /* 16 bit data bus */
+	info->smc.nrd_controlled = 1; /* Sample data on rising edge of NRD */
+	info->smc.nwe_controlled = 0; /* Drive data on falling edge of NCS */
+	info->smc.nwait_mode	 = 3; /* NWAIT is in READY mode */
+	info->smc.byte_write	 = 0; /* Byte select access type */
+	info->smc.tdf_mode	 = 0; /* TDF optimization disabled */
+	info->smc.tdf_cycles	 = 0; /* No TDF wait cycles */
+
+	/* Setup ATA timing */
+	ret = pata_at32_setup_timing(dev, info, &initial_timing);
+	if (ret)
+		goto err_setup_timing;
+
+	/* Setup ATA addresses */
+	ret = -ENOMEM;
+	info->ide_addr = devm_ioremap(dev, info->res_ide.start, 16);
+	info->alt_addr = devm_ioremap(dev, info->res_alt.start, 16);
+	if (!info->ide_addr || !info->alt_addr)
+		goto err_ioremap;
+
+#ifdef DEBUG_BUS
+	pata_at32_debug_bus(dev, info);
+#endif
+
+	/* Register ATA device */
+	ret = pata_at32_init_one(dev, info);
+	if (ret)
+		goto err_ata_device;
+
+	return 0;
+
+ err_ata_device:
+ err_ioremap:
+ err_setup_timing:
+	release_resource(&info->res_alt);
+ err_req_res_alt:
+	release_resource(&info->res_ide);
+ err_req_res_ide:
+	kfree(info);
+
+	return ret;
+}
+
+static int __exit pata_at32_remove(struct platform_device *pdev)
+{
+	struct ata_host *host = platform_get_drvdata(pdev);
+	struct at32_ide_info *info;
+
+	if (!host)
+		return 0;
+
+	info = host->private_data;
+	ata_host_detach(host);
+
+	if (!info)
+		return 0;
+
+	release_resource(&info->res_ide);
+	release_resource(&info->res_alt);
+
+	kfree(info);
+
+	return 0;
+}
+
+static struct platform_driver pata_at32_driver = {
+	.remove	       = __exit_p(pata_at32_remove),
+	.driver	       = {
+		.name  = "at32_ide",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init pata_at32_init(void)
+{
+	return platform_driver_probe(&pata_at32_driver, pata_at32_probe);
+}
+
+static void __exit pata_at32_exit(void)
+{
+	platform_driver_unregister(&pata_at32_driver);
+}
+
+module_init(pata_at32_init);
+module_exit(pata_at32_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("AVR32 SMC/CFC PATA Driver");
+MODULE_AUTHOR("Kristoffer Nyborg Gregertsen <kngregertsen@norway.atmel.com>");
+MODULE_VERSION(DRV_VERSION);
-- 
cgit v1.2.3-70-g09d2


From ec300d99ef8699a6f383889b8f8c0d0ebadc2a74 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Sat, 1 Sep 2007 07:17:36 -0400
Subject: [libata] ata_piix: Use more-robust form of array initialization

Use a form of array init that is less fragile, less sensitive to trivial
typos and ordering mismatches.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 34 ++++++++++++----------------------
 1 file changed, 12 insertions(+), 22 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 45e3b60f26d..7adb2aa009a 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -123,7 +123,6 @@ enum {
 	ich_pata_33		= 1,	/* ICH up to UDMA 33 only */
 	ich_pata_66		= 2,	/* ICH up to 66 Mhz */
 	ich_pata_100		= 3,	/* ICH up to UDMA 100 */
-	/* ICH up to UDMA 133 is not supported */
 	ich5_sata		= 5,
 	ich6_sata		= 6,
 	ich6_sata_ahci		= 7,
@@ -459,7 +458,7 @@ static const struct piix_map_db *piix_map_db_table[] = {
 };
 
 static struct ata_port_info piix_port_info[] = {
-	/* piix_pata_33: 0:  PIIX4 at 33MHz */
+	[piix_pata_33] =	/* PIIX4 at 33MHz */
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_PATA_FLAGS,
@@ -469,7 +468,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &piix_pata_ops,
 	},
 
-	/* ich_pata_33: 1 	ICH0 - ICH at 33Mhz*/
+	[ich_pata_33] = 	/* ICH0 - ICH at 33Mhz*/
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_PATA_FLAGS,
@@ -478,7 +477,8 @@ static struct ata_port_info piix_port_info[] = {
 		.udma_mask	= ATA_UDMA2, /* UDMA33 */
 		.port_ops	= &ich_pata_ops,
 	},
-	/* ich_pata_66: 2 	ICH controllers up to 66MHz */
+
+	[ich_pata_66] = 	/* ICH controllers up to 66MHz */
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_PATA_FLAGS,
@@ -488,7 +488,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &ich_pata_ops,
 	},
 
-	/* ich_pata_100: 3 */
+	[ich_pata_100] =
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
@@ -498,17 +498,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &ich_pata_ops,
 	},
 
-	/* ich_pata_133: 4 - Not supported - */
-	{
-		.sht		= &piix_sht,
-		.flags		= PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
-		.pio_mask 	= 0x1f,	/* pio 0-4 */
-		.mwdma_mask	= 0x06, /* Check: maybe 0x07  */
-		.udma_mask	= ATA_UDMA6, /* UDMA133 */
-		.port_ops	= &ich_pata_ops,
-	},
-
-	/* ich5_sata: 5 */
+	[ich5_sata] =
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_SATA_FLAGS,
@@ -518,7 +508,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &piix_sata_ops,
 	},
 
-	/* ich6_sata: 6 */
+	[ich6_sata] =
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR,
@@ -528,7 +518,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &piix_sata_ops,
 	},
 
-	/* ich6_sata_ahci: 7 */
+	[ich6_sata_ahci] =
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
@@ -539,7 +529,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &piix_sata_ops,
 	},
 
-	/* ich6m_sata_ahci: 8 */
+	[ich6m_sata_ahci] =
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
@@ -550,7 +540,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &piix_sata_ops,
 	},
 
-	/* ich8_sata_ahci: 9 */
+	[ich8_sata_ahci] =
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
@@ -561,7 +551,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &piix_sata_ops,
 	},
 
-	/* piix_pata_mwdma: 10:  PIIX3 MWDMA only */
+	[piix_pata_mwdma] = 	/* PIIX3 MWDMA only */
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_PATA_FLAGS,
@@ -570,7 +560,7 @@ static struct ata_port_info piix_port_info[] = {
 		.port_ops	= &piix_pata_ops,
 	},
 
-	/* tolapai_sata_ahci: 11: */
+	[tolapai_sata_ahci] =
 	{
 		.sht		= &piix_sht,
 		.flags		= PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
-- 
cgit v1.2.3-70-g09d2


From 539cc7c70c12fbdad4ee11f901cd7a0d7f52b186 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Thu, 20 Sep 2007 16:31:47 -0400
Subject: [libata] blacklist Maxtor*BANC* using new wildcard blacklist matching

Support the use of '*' in model_num and model_rev entries
in ata_device_blacklist[].

Based largely on David Milburn's "libata-core: support wildcard matching
in ata_blacklist_entry" patch.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 84d81b26e38..2b222700d9b 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3814,16 +3814,11 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	/* http://thread.gmane.org/gmane.linux.ide/14907 */
 	{ "FUJITSU MHT2060BH",	NULL,		ATA_HORKAGE_NONCQ },
 	/* NCQ is broken */
-	{ "Maxtor 6L250S0",     "BANC1G10",     ATA_HORKAGE_NONCQ },
-	{ "Maxtor 6B200M0",	"BANC1BM0",	ATA_HORKAGE_NONCQ },
-	{ "Maxtor 6B200M0",	"BANC1B10",	ATA_HORKAGE_NONCQ },
-	{ "Maxtor 7B250S0",	"BANC1B70",	ATA_HORKAGE_NONCQ, },
-	{ "Maxtor 7B300S0",	"BANC1B70",	ATA_HORKAGE_NONCQ },
+	{ "Maxtor *",		"BANC*",	ATA_HORKAGE_NONCQ },
 	{ "Maxtor 7V300F0",	"VA111630",	ATA_HORKAGE_NONCQ },
 	{ "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
-	 ATA_HORKAGE_NONCQ },
-	/* NCQ hard hangs device under heavier load, needs hard power cycle */
-	{ "Maxtor 6B250S0",	"BANC1B70",	ATA_HORKAGE_NONCQ },
+	  ATA_HORKAGE_NONCQ },
+
 	/* Blacklist entries taken from Silicon Image 3124/3132
 	   Windows driver .inf file - also several Linux problem reports */
 	{ "HTS541060G9SA00",    "MB3OC60D",     ATA_HORKAGE_NONCQ, },
@@ -3849,6 +3844,23 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ }
 };
 
+int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
+{
+	const char *p;
+	int len;
+
+	/*
+	 * check for trailing wildcard: *\0
+	 */
+	p = strchr(patt, wildchar);
+	if (p && ((*(p + 1)) == 0))
+		len = p - patt;
+	else
+		len = strlen(name);
+
+	return strncmp(patt, name, len);
+}
+
 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
 {
 	unsigned char model_num[ATA_ID_PROD_LEN + 1];
@@ -3859,10 +3871,10 @@ static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
 	ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
 
 	while (ad->model_num) {
-		if (!strcmp(ad->model_num, model_num)) {
+		if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
 			if (ad->model_rev == NULL)
 				return ad->horkage;
-			if (!strcmp(ad->model_rev, model_rev))
+			if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
 				return ad->horkage;
 		}
 		ad++;
-- 
cgit v1.2.3-70-g09d2


From c645fd34256e8ef4986d3e8acd569890cc421e5d Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 20 Sep 2007 14:58:48 +0100
Subject: libata: Update experimental tags to reflect reality better

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/Kconfig | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 2cd0e747671..3a737bdce2e 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -192,8 +192,8 @@ config PATA_AMD
 	  If unsure, say N.
 
 config PATA_ARTOP
-	tristate "ARTOP 6210/6260 PATA support (Experimental)"
-	depends on PCI && EXPERIMENTAL
+	tristate "ARTOP 6210/6260 PATA support"
+	depends on PCI
 	help
 	  This option enables support for ARTOP PATA controllers.
 
@@ -209,8 +209,8 @@ config PATA_AT32
 	  If unsure, say N.
 
 config PATA_ATIIXP
-	tristate "ATI PATA support (Experimental)"
-	depends on PCI && EXPERIMENTAL
+	tristate "ATI PATA support"
+	depends on PCI
 	help
 	  This option enables support for the ATI ATA interfaces
 	  found on the many ATI chipsets.
@@ -228,8 +228,8 @@ config PATA_CMD640_PCI
 	  If unsure, say N.
 
 config PATA_CMD64X
-	tristate "CMD64x PATA support (Very Experimental)"
-	depends on PCI&& EXPERIMENTAL
+	tristate "CMD64x PATA support"
+	depends on PCI
 	help
 	  This option enables support for the CMD64x series chips
 	  except for the CMD640.
@@ -291,8 +291,8 @@ config ATA_GENERIC
 	  If unsure, say N.
 
 config PATA_HPT366
-	tristate "HPT 366/368 PATA support (Experimental)"
-	depends on PCI && EXPERIMENTAL
+	tristate "HPT 366/368 PATA support"
+	depends on PCI
 	help
 	  This option enables support for the HPT 366 and 368
 	  PATA controllers via the new ATA layer.
-- 
cgit v1.2.3-70-g09d2


From d2a84f47899d1efc24fa610696f7b793692279c7 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 20 Sep 2007 15:07:12 +0100
Subject: pdc2027x: Switch properly to ioread/iowrite

Some iomap functions were still using readl/writel and friends which
happens to work on most platforms but is not correct.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_pdc2027x.c | 56 ++++++++++++++++++++++-----------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index f87c800be7f..3d3f1558cde 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -273,7 +273,7 @@ static int pdc2027x_cable_detect(struct ata_port *ap)
 	u32 cgcr;
 
 	/* check cable detect results */
-	cgcr = readl(port_mmio(ap, PDC_GLOBAL_CTL));
+	cgcr = ioread32(port_mmio(ap, PDC_GLOBAL_CTL));
 	if (cgcr & (1 << 26))
 		goto cbl40;
 
@@ -291,7 +291,7 @@ cbl40:
  */
 static inline int pdc2027x_port_enabled(struct ata_port *ap)
 {
-	return readb(port_mmio(ap, PDC_ATA_CTL)) & 0x02;
+	return ioread8(port_mmio(ap, PDC_ATA_CTL)) & 0x02;
 }
 
 /**
@@ -383,16 +383,16 @@ static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev)
 	/* Set the PIO timing registers using value table for 133MHz */
 	PDPRINTK("Set pio regs... \n");
 
-	ctcr0 = readl(dev_mmio(ap, adev, PDC_CTCR0));
+	ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0));
 	ctcr0 &= 0xffff0000;
 	ctcr0 |= pdc2027x_pio_timing_tbl[pio].value0 |
 		(pdc2027x_pio_timing_tbl[pio].value1 << 8);
-	writel(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
+	iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
 
-	ctcr1 = readl(dev_mmio(ap, adev, PDC_CTCR1));
+	ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
 	ctcr1 &= 0x00ffffff;
 	ctcr1 |= (pdc2027x_pio_timing_tbl[pio].value2 << 24);
-	writel(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
+	iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
 
 	PDPRINTK("Set pio regs done\n");
 
@@ -426,18 +426,18 @@ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 			 * If tHOLD is '1', the hardware will add half clock for data hold time.
 			 * This code segment seems to be no effect. tHOLD will be overwritten below.
 			 */
-			ctcr1 = readl(dev_mmio(ap, adev, PDC_CTCR1));
-			writel(ctcr1 & ~(1 << 7), dev_mmio(ap, adev, PDC_CTCR1));
+			ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
+			iowrite32(ctcr1 & ~(1 << 7), dev_mmio(ap, adev, PDC_CTCR1));
 		}
 
 		PDPRINTK("Set udma regs... \n");
 
-		ctcr1 = readl(dev_mmio(ap, adev, PDC_CTCR1));
+		ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
 		ctcr1 &= 0xff000000;
 		ctcr1 |= pdc2027x_udma_timing_tbl[udma_mode].value0 |
 			(pdc2027x_udma_timing_tbl[udma_mode].value1 << 8) |
 			(pdc2027x_udma_timing_tbl[udma_mode].value2 << 16);
-		writel(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
+		iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
 
 		PDPRINTK("Set udma regs done\n");
 
@@ -449,13 +449,13 @@ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 		unsigned int mdma_mode = dma_mode & 0x07;
 
 		PDPRINTK("Set mdma regs... \n");
-		ctcr0 = readl(dev_mmio(ap, adev, PDC_CTCR0));
+		ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0));
 
 		ctcr0 &= 0x0000ffff;
 		ctcr0 |= (pdc2027x_mdma_timing_tbl[mdma_mode].value0 << 16) |
 			(pdc2027x_mdma_timing_tbl[mdma_mode].value1 << 24);
 
-		writel(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
+		iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
 		PDPRINTK("Set mdma regs done\n");
 
 		PDPRINTK("Set to mdma mode[%u] \n", mdma_mode);
@@ -492,9 +492,9 @@ static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed
 			 * Enable prefetch if the device support PIO only.
 			 */
 			if (dev->xfer_shift == ATA_SHIFT_PIO) {
-				u32 ctcr1 = readl(dev_mmio(ap, dev, PDC_CTCR1));
+				u32 ctcr1 = ioread32(dev_mmio(ap, dev, PDC_CTCR1));
 				ctcr1 |= (1 << 25);
-				writel(ctcr1, dev_mmio(ap, dev, PDC_CTCR1));
+				iowrite32(ctcr1, dev_mmio(ap, dev, PDC_CTCR1));
 
 				PDPRINTK("Turn on prefetch\n");
 			} else {
@@ -559,12 +559,12 @@ static long pdc_read_counter(struct ata_host *host)
 	u32 bccrl, bccrh, bccrlv, bccrhv;
 
 retry:
-	bccrl = readl(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
-	bccrh = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
+	bccrl = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
+	bccrh = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
 
 	/* Read the counter values again for verification */
-	bccrlv = readl(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
-	bccrhv = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
+	bccrlv = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
+	bccrhv = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
 
 	counter = (bccrh << 15) | bccrl;
 
@@ -613,7 +613,7 @@ static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int b
 	/* Show the current clock value of PLL control register
 	 * (maybe already configured by the firmware)
 	 */
-	pll_ctl = readw(mmio_base + PDC_PLL_CTL);
+	pll_ctl = ioread16(mmio_base + PDC_PLL_CTL);
 
 	PDPRINTK("pll_ctl[%X]\n", pll_ctl);
 #endif
@@ -653,8 +653,8 @@ static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int b
 
 	PDPRINTK("Writing pll_ctl[%X]\n", pll_ctl);
 
-	writew(pll_ctl, mmio_base + PDC_PLL_CTL);
-	readw(mmio_base + PDC_PLL_CTL); /* flush */
+	iowrite16(pll_ctl, mmio_base + PDC_PLL_CTL);
+	ioread16(mmio_base + PDC_PLL_CTL); /* flush */
 
 	/* Wait the PLL circuit to be stable */
 	mdelay(30);
@@ -664,7 +664,7 @@ static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int b
 	 *  Show the current clock value of PLL control register
 	 * (maybe configured by the firmware)
 	 */
-	pll_ctl = readw(mmio_base + PDC_PLL_CTL);
+	pll_ctl = ioread16(mmio_base + PDC_PLL_CTL);
 
 	PDPRINTK("pll_ctl[%X]\n", pll_ctl);
 #endif
@@ -687,10 +687,10 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
 	long pll_clock, usec_elapsed;
 
 	/* Start the test mode */
-	scr = readl(mmio_base + PDC_SYS_CTL);
+	scr = ioread32(mmio_base + PDC_SYS_CTL);
 	PDPRINTK("scr[%X]\n", scr);
-	writel(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL);
-	readl(mmio_base + PDC_SYS_CTL); /* flush */
+	iowrite32(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL);
+	ioread32(mmio_base + PDC_SYS_CTL); /* flush */
 
 	/* Read current counter value */
 	start_count = pdc_read_counter(host);
@@ -704,10 +704,10 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
 	do_gettimeofday(&end_time);
 
 	/* Stop the test mode */
-	scr = readl(mmio_base + PDC_SYS_CTL);
+	scr = ioread32(mmio_base + PDC_SYS_CTL);
 	PDPRINTK("scr[%X]\n", scr);
-	writel(scr & ~(0x01 << 14), mmio_base + PDC_SYS_CTL);
-	readl(mmio_base + PDC_SYS_CTL); /* flush */
+	iowrite32(scr & ~(0x01 << 14), mmio_base + PDC_SYS_CTL);
+	ioread32(mmio_base + PDC_SYS_CTL); /* flush */
 
 	/* calculate the input clock in Hz */
 	usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
-- 
cgit v1.2.3-70-g09d2


From e10b8c3f5f23188e065b1845ba732570eca007fe Mon Sep 17 00:00:00 2001
From: Boaz Harrosh <bharrosh@panasas.com>
Date: Tue, 18 Sep 2007 17:46:12 +0200
Subject: libata-scsi: Remove !use_sg code paths

     This is a minimal patch needed to remove use of !use_sg
     but it is not a complete clean up of the !use_sg paths.
     Libata-core still has the qc->flags & ATA_QCFLAG_SG
     and !qc->n_elem code paths. Perhaps an ata maintainer
     would have a go at it.

     - TODO: further cleanup of qc->flags & ATA_QCFLAG_SG
       and !qc->n_elem code paths in libata-core
     - TODO: Use scsi_dma_{map,unmap} where applicable.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-scsi.c | 31 +++++++++----------------------
 1 file changed, 9 insertions(+), 22 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index f0f586b56c2..598ef1018e1 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -450,13 +450,8 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
 		qc->scsicmd = cmd;
 		qc->scsidone = done;
 
-		if (cmd->use_sg) {
-			qc->__sg = (struct scatterlist *) cmd->request_buffer;
-			qc->n_elem = cmd->use_sg;
-		} else if (cmd->request_bufflen) {
-			qc->__sg = &qc->sgent;
-			qc->n_elem = 1;
-		}
+		qc->__sg = (struct scatterlist *) cmd->request_buffer;
+		qc->n_elem = cmd->use_sg;
 	} else {
 		cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
 		done(cmd);
@@ -1504,11 +1499,7 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
 			goto err_did;
 		}
 
-		if (cmd->use_sg)
-			ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
-		else
-			ata_sg_init_one(qc, cmd->request_buffer,
-					cmd->request_bufflen);
+		ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
 
 		qc->dma_dir = cmd->sc_data_direction;
 	}
@@ -1562,15 +1553,14 @@ static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
 	u8 *buf;
 	unsigned int buflen;
 
-	if (cmd->use_sg) {
-		struct scatterlist *sg;
+	struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer;
 
-		sg = (struct scatterlist *) cmd->request_buffer;
+	if (sg) {
 		buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
 		buflen = sg->length;
 	} else {
-		buf = cmd->request_buffer;
-		buflen = cmd->request_bufflen;
+		buf = NULL;
+		buflen = 0;
 	}
 
 	*buf_out = buf;
@@ -1590,12 +1580,9 @@ static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
 
 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
 {
-	if (cmd->use_sg) {
-		struct scatterlist *sg;
-
-		sg = (struct scatterlist *) cmd->request_buffer;
+	struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer;
+	if (sg)
 		kunmap_atomic(buf - sg->offset, KM_IRQ0);
-	}
 }
 
 /**
-- 
cgit v1.2.3-70-g09d2


From 7120165cf31e989baf7836218ca0a13643074735 Mon Sep 17 00:00:00 2001
From: Boaz Harrosh <bharrosh@panasas.com>
Date: Tue, 18 Sep 2007 17:48:50 +0200
Subject: libata-scsi: convert to use the data buffer accessors

  simple search-and-replace of direct scsi_cmnd access to
  use the data buffer accessors.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-scsi.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 598ef1018e1..7ad046b7c35 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -450,8 +450,8 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
 		qc->scsicmd = cmd;
 		qc->scsidone = done;
 
-		qc->__sg = (struct scatterlist *) cmd->request_buffer;
-		qc->n_elem = cmd->use_sg;
+		qc->__sg = scsi_sglist(cmd);
+		qc->n_elem = scsi_sg_count(cmd);
 	} else {
 		cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
 		done(cmd);
@@ -1493,13 +1493,13 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
 	/* data is present; dma-map it */
 	if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
 	    cmd->sc_data_direction == DMA_TO_DEVICE) {
-		if (unlikely(cmd->request_bufflen < 1)) {
+		if (unlikely(scsi_bufflen(cmd) < 1)) {
 			ata_dev_printk(dev, KERN_WARNING,
 				       "WARNING: zero len r/w req\n");
 			goto err_did;
 		}
 
-		ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
+		ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
 
 		qc->dma_dir = cmd->sc_data_direction;
 	}
@@ -1553,7 +1553,7 @@ static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
 	u8 *buf;
 	unsigned int buflen;
 
-	struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer;
+	struct scatterlist *sg = scsi_sglist(cmd);
 
 	if (sg) {
 		buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
@@ -1580,7 +1580,7 @@ static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
 
 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
 {
-	struct scatterlist *sg = (struct scatterlist *) cmd->request_buffer;
+	struct scatterlist *sg = scsi_sglist(cmd);
 	if (sg)
 		kunmap_atomic(buf - sg->offset, KM_IRQ0);
 }
@@ -2383,7 +2383,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
 	}
 
 	qc->tf.command = ATA_CMD_PACKET;
-	qc->nbytes = scmd->request_bufflen;
+	qc->nbytes = scsi_bufflen(scmd);
 
 	/* check whether ATAPI DMA is safe */
 	if (!using_pio && ata_check_atapi_dma(qc))
@@ -2633,7 +2633,7 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
 	case ATA_CMD_WRITE_LONG_ONCE:
 		if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
 			goto invalid_fld;
-		qc->sect_size = scmd->request_bufflen;
+		qc->sect_size = scsi_bufflen(scmd);
 	}
 
 	/*
@@ -2663,7 +2663,7 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
 	 * TODO: find out if we need to do more here to
 	 *       cover scatter/gather case.
 	 */
-	qc->nbytes = scmd->request_bufflen;
+	qc->nbytes = scsi_bufflen(scmd);
 
 	/* request result TF */
 	qc->flags |= ATA_QCFLAG_RESULT_TF;
-- 
cgit v1.2.3-70-g09d2


From e2d352af6d8f1734394bc1bcf0afe345cc3ef235 Mon Sep 17 00:00:00 2001
From: Jason Gaston <jason.d.gaston@intel.com>
Date: Fri, 7 Sep 2007 17:21:03 -0700
Subject: ata_piix: replace spaces with tabs

This patch removes some incorrect formatting spaces and replaces them with tabs.

Signed-off-by: Jason Gaston <jason.d.gaston@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 7adb2aa009a..8dc15a6cea7 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -437,15 +437,15 @@ static const struct piix_map_db ich8_map_db = {
 };
 
 static const struct piix_map_db tolapai_map_db = {
-        .mask = 0x3,
-        .port_enable = 0x3,
-        .map = {
-                /* PM   PS   SM   SS       MAP */
-                {  P0,  NA,  P1,  NA }, /* 00b */
-                {  RV,  RV,  RV,  RV }, /* 01b */
-                {  RV,  RV,  RV,  RV }, /* 10b */
-                {  RV,  RV,  RV,  RV },
-        },
+	.mask = 0x3,
+	.port_enable = 0x3,
+	.map = {
+		/* PM   PS   SM   SS       MAP */
+		{  P0,  NA,  P1,  NA }, /* 00b */
+		{  RV,  RV,  RV,  RV }, /* 01b */
+		{  RV,  RV,  RV,  RV }, /* 10b */
+		{  RV,  RV,  RV,  RV },
+	},
 };
 
 static const struct piix_map_db *piix_map_db_table[] = {
-- 
cgit v1.2.3-70-g09d2


From db6f8759d05d2082f09a45b5674edc0fb5e92b1b Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 3 Sep 2007 12:31:58 +0900
Subject: libata: move ata_id_n_sectors() upward

Move ata_id_n_sectors() upward right below ata_id_c_string().  This is
to accomodate later changes.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 2b222700d9b..b33aea3638d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -821,6 +821,21 @@ void ata_id_c_string(const u16 *id, unsigned char *s,
 	*p = '\0';
 }
 
+static u64 ata_id_n_sectors(const u16 *id)
+{
+	if (ata_id_has_lba(id)) {
+		if (ata_id_has_lba48(id))
+			return ata_id_u64(id, 100);
+		else
+			return ata_id_u32(id, 60);
+	} else {
+		if (ata_id_current_chs_valid(id))
+			return ata_id_u32(id, 57);
+		else
+			return id[1] * id[3] * id[6];
+	}
+}
+
 static u64 ata_tf_to_lba48(struct ata_taskfile *tf)
 {
 	u64 sectors = 0;
@@ -1021,21 +1036,6 @@ static u64 ata_hpa_resize(struct ata_device *dev)
 	return sectors;
 }
 
-static u64 ata_id_n_sectors(const u16 *id)
-{
-	if (ata_id_has_lba(id)) {
-		if (ata_id_has_lba48(id))
-			return ata_id_u64(id, 100);
-		else
-			return ata_id_u32(id, 60);
-	} else {
-		if (ata_id_current_chs_valid(id))
-			return ata_id_u32(id, 57);
-		else
-			return id[1] * id[3] * id[6];
-	}
-}
-
 /**
  *	ata_id_to_dma_mode	-	Identify DMA mode from id block
  *	@dev: device to identify
-- 
cgit v1.2.3-70-g09d2


From c728a9149f519cbb9f610962873f4e22ed4a6efd Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 3 Sep 2007 12:32:30 +0900
Subject: libata: clean up read/set native_max address functions

Merge ata_read_native_max_addres_ext() into ata_read_native_max_address()
and combine ata_set_native_max_address_ext() and
ata_set_native_max_address() into ata_set_max_sectors().

* reduce duplicate code
* return 0 or -errno depending on error conditions
* report if command fails
* use ATA_LBA instead of 0x40

This is in preparation of ata_hpa_resize() update.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 174 ++++++++++++++++++++--------------------------
 1 file changed, 77 insertions(+), 97 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b33aea3638d..c7614bdc0cb 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -863,129 +863,113 @@ static u64 ata_tf_to_lba(struct ata_taskfile *tf)
 }
 
 /**
- *	ata_read_native_max_address_ext	-	LBA48 native max query
- *	@dev: Device to query
+ *	ata_read_native_max_address - Read native max address
+ *	@dev: target device
+ *	@max_sectors: out parameter for the result native max address
  *
- *	Perform an LBA48 size query upon the device in question. Return the
- *	actual LBA48 size or zero if the command fails.
- */
-
-static u64 ata_read_native_max_address_ext(struct ata_device *dev)
-{
-	unsigned int err;
-	struct ata_taskfile tf;
-
-	ata_tf_init(dev, &tf);
-
-	tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
-	tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR;
-	tf.protocol |= ATA_PROT_NODATA;
-	tf.device |= 0x40;
-
-	err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
-	if (err)
-		return 0;
-
-	return ata_tf_to_lba48(&tf);
-}
-
-/**
- *	ata_read_native_max_address	-	LBA28 native max query
- *	@dev: Device to query
+ *	Perform an LBA48 or LBA28 native size query upon the device in
+ *	question.
  *
- *	Performa an LBA28 size query upon the device in question. Return the
- *	actual LBA28 size or zero if the command fails.
+ *	RETURNS:
+ *	0 on success, -EACCES if command is aborted by the drive.
+ *	-EIO on other errors.
  */
-
-static u64 ata_read_native_max_address(struct ata_device *dev)
+static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
 {
-	unsigned int err;
+	unsigned int err_mask;
 	struct ata_taskfile tf;
+	int lba48 = ata_id_has_lba48(dev->id);
 
 	ata_tf_init(dev, &tf);
 
-	tf.command = ATA_CMD_READ_NATIVE_MAX;
+	/* always clear all address registers */
 	tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
-	tf.protocol |= ATA_PROT_NODATA;
-	tf.device |= 0x40;
 
-	err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
-	if (err)
-		return 0;
-
-	return ata_tf_to_lba(&tf);
-}
-
-/**
- *	ata_set_native_max_address_ext	-	LBA48 native max set
- *	@dev: Device to query
- *	@new_sectors: new max sectors value to set for the device
- *
- *	Perform an LBA48 size set max upon the device in question. Return the
- *	actual LBA48 size or zero if the command fails.
- */
-
-static u64 ata_set_native_max_address_ext(struct ata_device *dev, u64 new_sectors)
-{
-	unsigned int err;
-	struct ata_taskfile tf;
-
-	new_sectors--;
-
-	ata_tf_init(dev, &tf);
+	if (lba48) {
+		tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
+		tf.flags |= ATA_TFLAG_LBA48;
+	} else
+		tf.command = ATA_CMD_READ_NATIVE_MAX;
 
-	tf.command = ATA_CMD_SET_MAX_EXT;
-	tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR;
 	tf.protocol |= ATA_PROT_NODATA;
-	tf.device |= 0x40;
-
-	tf.lbal = (new_sectors >> 0) & 0xff;
-	tf.lbam = (new_sectors >> 8) & 0xff;
-	tf.lbah = (new_sectors >> 16) & 0xff;
+	tf.device |= ATA_LBA;
 
-	tf.hob_lbal = (new_sectors >> 24) & 0xff;
-	tf.hob_lbam = (new_sectors >> 32) & 0xff;
-	tf.hob_lbah = (new_sectors >> 40) & 0xff;
+	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	if (err_mask) {
+		ata_dev_printk(dev, KERN_WARNING, "failed to read native "
+			       "max address (err_mask=0x%x)\n", err_mask);
+		if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
+			return -EACCES;
+		return -EIO;
+	}
 
-	err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
-	if (err)
-		return 0;
+	if (lba48)
+		*max_sectors = ata_tf_to_lba48(&tf);
+	else
+		*max_sectors = ata_tf_to_lba(&tf);
 
-	return ata_tf_to_lba48(&tf);
+	return 0;
 }
 
 /**
- *	ata_set_native_max_address	-	LBA28 native max set
- *	@dev: Device to query
+ *	ata_set_max_sectors - Set max sectors
+ *	@dev: target device
  *	@new_sectors: new max sectors value to set for the device
+ *	@res_sectors: result max sectors
  *
- *	Perform an LBA28 size set max upon the device in question. Return the
- *	actual LBA28 size or zero if the command fails.
+ *	Set max sectors of @dev to @new_sectors.
+ *
+ *	RETURNS:
+ *	0 on success, -EACCES if command is aborted or denied (due to
+ *	previous non-volatile SET_MAX) by the drive.  -EIO on other
+ *	errors.
  */
-
-static u64 ata_set_native_max_address(struct ata_device *dev, u64 new_sectors)
+static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors,
+			       u64 *res_sectors)
 {
-	unsigned int err;
+	unsigned int err_mask;
 	struct ata_taskfile tf;
+	int lba48 = ata_id_has_lba48(dev->id);
 
 	new_sectors--;
 
 	ata_tf_init(dev, &tf);
 
-	tf.command = ATA_CMD_SET_MAX;
 	tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
+
+	if (lba48) {
+		tf.command = ATA_CMD_SET_MAX_EXT;
+		tf.flags |= ATA_TFLAG_LBA48;
+
+		tf.hob_lbal = (new_sectors >> 24) & 0xff;
+		tf.hob_lbam = (new_sectors >> 32) & 0xff;
+		tf.hob_lbah = (new_sectors >> 40) & 0xff;
+	} else
+		tf.command = ATA_CMD_SET_MAX;
+
 	tf.protocol |= ATA_PROT_NODATA;
+	tf.device |= ATA_LBA;
 
 	tf.lbal = (new_sectors >> 0) & 0xff;
 	tf.lbam = (new_sectors >> 8) & 0xff;
 	tf.lbah = (new_sectors >> 16) & 0xff;
-	tf.device |= ((new_sectors >> 24) & 0x0f) | 0x40;
 
-	err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
-	if (err)
-		return 0;
+	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	if (err_mask) {
+		ata_dev_printk(dev, KERN_WARNING, "failed to set "
+			       "max address (err_mask=0x%x)\n", err_mask);
+		if (err_mask == AC_ERR_DEV &&
+		    (tf.feature & (ATA_ABORTED | ATA_IDNF)))
+			return -EACCES;
+		return -EIO;
+	}
 
-	return ata_tf_to_lba(&tf);
+	if (lba48)
+		*res_sectors = ata_tf_to_lba48(&tf);
+	else
+		*res_sectors = ata_tf_to_lba(&tf);
+
+	return 0;
 }
 
 /**
@@ -1001,11 +985,11 @@ static u64 ata_hpa_resize(struct ata_device *dev)
 {
 	u64 sectors = dev->n_sectors;
 	u64 hpa_sectors;
+	int rc;
 
-	if (ata_id_has_lba48(dev->id))
-		hpa_sectors = ata_read_native_max_address_ext(dev);
-	else
-		hpa_sectors = ata_read_native_max_address(dev);
+	rc = ata_read_native_max_address(dev, &hpa_sectors);
+	if (rc)
+		return 0;
 
 	if (hpa_sectors > sectors) {
 		ata_dev_printk(dev, KERN_INFO,
@@ -1015,13 +999,9 @@ static u64 ata_hpa_resize(struct ata_device *dev)
 			(long long)sectors, (long long)hpa_sectors);
 
 		if (ata_ignore_hpa) {
-			if (ata_id_has_lba48(dev->id))
-				hpa_sectors = ata_set_native_max_address_ext(dev, hpa_sectors);
-			else
-				hpa_sectors = ata_set_native_max_address(dev,
-								hpa_sectors);
+			rc = ata_set_max_sectors(dev, hpa_sectors, &hpa_sectors);
 
-			if (hpa_sectors) {
+			if (rc == 0) {
 				ata_dev_printk(dev, KERN_INFO, "native size "
 					"increased to %lld sectors\n",
 					(long long)hpa_sectors);
-- 
cgit v1.2.3-70-g09d2


From 05027adccc09401a7e31d5ef51040dc75ab03c22 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 3 Sep 2007 12:32:57 +0900
Subject: libata: remiplement ata_hpa_resize()

This patch reimplement ata_hpa_resize() such that...

* All HPA related decisions are made inside ata_hpa_resize() proper.
  ata_hpa_resize() returns 0 if configuration can proceed, -errno if
  device needs to be reset and reconfigured.

* All errors are handled properly.  If HPA unlocking isn't requested,
  HPA handling is disabled automatically to avoid unnecessary device
  detection failure.

* Messages are trimmed.  HPA detection message is printed only during
  initial configuration.  HPA unlocked message is printed only during
  initial configuration or unlocking results in different size.

* Instead of using sectors returned in TF of SET_MAX, re-read IDENTIFY
  data as that's the value the device is going to use.

* It's called early during ata_dev_configure() as IDENTIFY data might
  change after resizing.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 124 +++++++++++++++++++++++++++++++---------------
 1 file changed, 85 insertions(+), 39 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c7614bdc0cb..b01b5a897dc 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -915,7 +915,6 @@ static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
  *	ata_set_max_sectors - Set max sectors
  *	@dev: target device
  *	@new_sectors: new max sectors value to set for the device
- *	@res_sectors: result max sectors
  *
  *	Set max sectors of @dev to @new_sectors.
  *
@@ -924,8 +923,7 @@ static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
  *	previous non-volatile SET_MAX) by the drive.  -EIO on other
  *	errors.
  */
-static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors,
-			       u64 *res_sectors)
+static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
 {
 	unsigned int err_mask;
 	struct ata_taskfile tf;
@@ -964,11 +962,6 @@ static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors,
 		return -EIO;
 	}
 
-	if (lba48)
-		*res_sectors = ata_tf_to_lba48(&tf);
-	else
-		*res_sectors = ata_tf_to_lba(&tf);
-
 	return 0;
 }
 
@@ -979,41 +972,93 @@ static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors,
  *	Read the size of an LBA28 or LBA48 disk with HPA features and resize
  *	it if required to the full size of the media. The caller must check
  *	the drive has the HPA feature set enabled.
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
  */
-
-static u64 ata_hpa_resize(struct ata_device *dev)
+static int ata_hpa_resize(struct ata_device *dev)
 {
-	u64 sectors = dev->n_sectors;
-	u64 hpa_sectors;
+	struct ata_eh_context *ehc = &dev->link->eh_context;
+	int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
+	u64 sectors = ata_id_n_sectors(dev->id);
+	u64 native_sectors;
 	int rc;
 
-	rc = ata_read_native_max_address(dev, &hpa_sectors);
-	if (rc)
+	/* do we need to do it? */
+	if (dev->class != ATA_DEV_ATA ||
+	    !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
+	    (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
 		return 0;
 
-	if (hpa_sectors > sectors) {
-		ata_dev_printk(dev, KERN_INFO,
-			"Host Protected Area detected:\n"
-			"\tcurrent size: %lld sectors\n"
-			"\tnative size: %lld sectors\n",
-			(long long)sectors, (long long)hpa_sectors);
-
-		if (ata_ignore_hpa) {
-			rc = ata_set_max_sectors(dev, hpa_sectors, &hpa_sectors);
-
-			if (rc == 0) {
-				ata_dev_printk(dev, KERN_INFO, "native size "
-					"increased to %lld sectors\n",
-					(long long)hpa_sectors);
-				return hpa_sectors;
-			}
+	/* read native max address */
+	rc = ata_read_native_max_address(dev, &native_sectors);
+	if (rc) {
+		/* If HPA isn't going to be unlocked, skip HPA
+		 * resizing from the next try.
+		 */
+		if (!ata_ignore_hpa) {
+			ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
+				       "broken, will skip HPA handling\n");
+			dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
+
+			/* we can continue if device aborted the command */
+			if (rc == -EACCES)
+				rc = 0;
 		}
-	} else if (hpa_sectors < sectors)
-		ata_dev_printk(dev, KERN_WARNING, "%s 1: hpa sectors (%lld) "
-			       "is smaller than sectors (%lld)\n", __FUNCTION__,
-			       (long long)hpa_sectors, (long long)sectors);
 
-	return sectors;
+		return rc;
+	}
+
+	/* nothing to do? */
+	if (native_sectors <= sectors || !ata_ignore_hpa) {
+		if (!print_info || native_sectors == sectors)
+			return 0;
+
+		if (native_sectors > sectors)
+			ata_dev_printk(dev, KERN_INFO,
+				"HPA detected: current %llu, native %llu\n",
+				(unsigned long long)sectors,
+				(unsigned long long)native_sectors);
+		else if (native_sectors < sectors)
+			ata_dev_printk(dev, KERN_WARNING,
+				"native sectors (%llu) is smaller than "
+				"sectors (%llu)\n",
+				(unsigned long long)native_sectors,
+				(unsigned long long)sectors);
+		return 0;
+	}
+
+	/* let's unlock HPA */
+	rc = ata_set_max_sectors(dev, native_sectors);
+	if (rc == -EACCES) {
+		/* if device aborted the command, skip HPA resizing */
+		ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
+			       "(%llu -> %llu), skipping HPA handling\n",
+			       (unsigned long long)sectors,
+			       (unsigned long long)native_sectors);
+		dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
+		return 0;
+	} else if (rc)
+		return rc;
+
+	/* re-read IDENTIFY data */
+	rc = ata_dev_reread_id(dev, 0);
+	if (rc) {
+		ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
+			       "data after HPA resizing\n");
+		return rc;
+	}
+
+	if (print_info) {
+		u64 new_sectors = ata_id_n_sectors(dev->id);
+		ata_dev_printk(dev, KERN_INFO,
+			"HPA unlocked: %llu -> %llu, native %llu\n",
+			(unsigned long long)sectors,
+			(unsigned long long)new_sectors,
+			(unsigned long long)native_sectors);
+	}
+
+	return 0;
 }
 
 /**
@@ -1837,6 +1882,11 @@ int ata_dev_configure(struct ata_device *dev)
 	if (rc)
 		return rc;
 
+	/* massage HPA, do it early as it might change IDENTIFY data */
+	rc = ata_hpa_resize(dev);
+	if (rc)
+		return rc;
+
 	/* print device capabilities */
 	if (ata_msg_probe(ap))
 		ata_dev_printk(dev, KERN_DEBUG,
@@ -1904,10 +1954,6 @@ int ata_dev_configure(struct ata_device *dev)
 					dev->flags |= ATA_DFLAG_FLUSH_EXT;
 			}
 
-			if (!(dev->horkage & ATA_HORKAGE_BROKEN_HPA) &&
-			    ata_id_hpa_enabled(dev->id))
- 				dev->n_sectors = ata_hpa_resize(dev);
-
 			/* config NCQ */
 			ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
 
-- 
cgit v1.2.3-70-g09d2


From 7a234aff3d83728fd83cf19df32d3df52566d2ac Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 3 Sep 2007 12:44:57 +0900
Subject: ahci: reimplement port_map handling

Reimplement port_map handling such that

1. Non-zero PORTS_IMPL value is always examined and used if consistent
   with cap.n_ports.

2. When PI and cat.n_ports are inconsistent, honor cap.n_ports and
   force port_map to be ((1 << cap.n_ports) - 1).

3. There were two separate places dealing with port_map.  Unify them
   to one.

As all newer ahci chips seem to get PI correct and older ones usually
have zero PI.  Controllers with holes in PI are very unlikely to screw
up PI, so #2 makes more sense than following inconsistent PI.

Without this change, not setting ATA_FLAG_HONOR_PI when it's needed
results in weird detection failure.  This changed logic should be able
to handle all known cases correctly automatically.

Verified on ICH6 (reports 0 PI), ICH8 (with holes in port_map), ICH9,
JMB360 and JMB363.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 89 ++++++++++++++++++++++++------------------------------
 1 file changed, 39 insertions(+), 50 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 518c5183035..57cc3e73a7e 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -77,11 +77,10 @@ enum {
 	RX_FIS_UNK		= 0x60, /* offset of Unknown FIS data */
 
 	board_ahci		= 0,
-	board_ahci_pi		= 1,
-	board_ahci_vt8251	= 2,
-	board_ahci_ign_iferr	= 3,
-	board_ahci_sb600	= 4,
-	board_ahci_mv		= 5,
+	board_ahci_vt8251	= 1,
+	board_ahci_ign_iferr	= 2,
+	board_ahci_sb600	= 3,
+	board_ahci_mv		= 4,
 
 	/* global controller registers */
 	HOST_CAP		= 0x00, /* host capabilities */
@@ -170,7 +169,6 @@ enum {
 	/* ap->flags bits */
 	AHCI_FLAG_NO_NCQ		= (1 << 24),
 	AHCI_FLAG_IGN_IRQ_IF_ERR	= (1 << 25), /* ignore IRQ_IF_ERR */
-	AHCI_FLAG_HONOR_PI		= (1 << 26), /* honor PORTS_IMPL */
 	AHCI_FLAG_IGN_SERR_INTERNAL	= (1 << 27), /* ignore SERR_INTERNAL */
 	AHCI_FLAG_32BIT_ONLY		= (1 << 28), /* force 32bit */
 	AHCI_FLAG_MV_PATA		= (1 << 29), /* PATA port */
@@ -332,14 +330,6 @@ static const struct ata_port_info ahci_port_info[] = {
 		.udma_mask	= ATA_UDMA6,
 		.port_ops	= &ahci_ops,
 	},
-	/* board_ahci_pi */
-	{
-		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_HONOR_PI,
-		.link_flags	= AHCI_LFLAG_COMMON,
-		.pio_mask	= 0x1f, /* pio0-4 */
-		.udma_mask	= ATA_UDMA6,
-		.port_ops	= &ahci_ops,
-	},
 	/* board_ahci_vt8251 */
 	{
 		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_NO_NCQ,
@@ -371,8 +361,8 @@ static const struct ata_port_info ahci_port_info[] = {
 		.sht		= &ahci_sht,
 		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 				  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-				  AHCI_FLAG_HONOR_PI | AHCI_FLAG_NO_NCQ |
-				  AHCI_FLAG_NO_MSI | AHCI_FLAG_MV_PATA,
+				  AHCI_FLAG_NO_NCQ | AHCI_FLAG_NO_MSI |
+				  AHCI_FLAG_MV_PATA,
 		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
@@ -392,23 +382,23 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 	{ PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
 	{ PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
 	{ PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
-	{ PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */
-	{ PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */
-	{ PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */
-	{ PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */
-	{ PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */
-	{ PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */
-	{ PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */
-	{ PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */
-	{ PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */
-	{ PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */
-	{ PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */
-	{ PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */
-	{ PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */
-	{ PCI_VDEVICE(INTEL, 0x292c), board_ahci_pi }, /* ICH9M */
-	{ PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */
-	{ PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */
-	{ PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */
+	{ PCI_VDEVICE(INTEL, 0x2821), board_ahci }, /* ICH8 */
+	{ PCI_VDEVICE(INTEL, 0x2822), board_ahci }, /* ICH8 */
+	{ PCI_VDEVICE(INTEL, 0x2824), board_ahci }, /* ICH8 */
+	{ PCI_VDEVICE(INTEL, 0x2829), board_ahci }, /* ICH8M */
+	{ PCI_VDEVICE(INTEL, 0x282a), board_ahci }, /* ICH8M */
+	{ PCI_VDEVICE(INTEL, 0x2922), board_ahci }, /* ICH9 */
+	{ PCI_VDEVICE(INTEL, 0x2923), board_ahci }, /* ICH9 */
+	{ PCI_VDEVICE(INTEL, 0x2924), board_ahci }, /* ICH9 */
+	{ PCI_VDEVICE(INTEL, 0x2925), board_ahci }, /* ICH9 */
+	{ PCI_VDEVICE(INTEL, 0x2927), board_ahci }, /* ICH9 */
+	{ PCI_VDEVICE(INTEL, 0x2929), board_ahci }, /* ICH9M */
+	{ PCI_VDEVICE(INTEL, 0x292a), board_ahci }, /* ICH9M */
+	{ PCI_VDEVICE(INTEL, 0x292b), board_ahci }, /* ICH9M */
+	{ PCI_VDEVICE(INTEL, 0x292c), board_ahci }, /* ICH9M */
+	{ PCI_VDEVICE(INTEL, 0x292f), board_ahci }, /* ICH9M */
+	{ PCI_VDEVICE(INTEL, 0x294d), board_ahci }, /* ICH9 */
+	{ PCI_VDEVICE(INTEL, 0x294e), board_ahci }, /* ICH9M */
 
 	/* JMicron 360/1/3/5/6, match class to avoid IDE function */
 	{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
@@ -562,16 +552,6 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
 		cap &= ~HOST_CAP_NCQ;
 	}
 
-	/* fixup zero port_map */
-	if (!port_map) {
-		port_map = (1 << ahci_nr_ports(cap)) - 1;
-		dev_printk(KERN_WARNING, &pdev->dev,
-			   "PORTS_IMPL is zero, forcing 0x%x\n", port_map);
-
-		/* write the fixed up value to the PI register */
-		hpriv->saved_port_map = port_map;
-	}
-
 	/*
 	 * Temporary Marvell 6145 hack: PATA port presence
 	 * is asserted through the standard AHCI port
@@ -587,7 +567,7 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
 	}
 
 	/* cross check port_map and cap.n_ports */
-	if (pi->flags & AHCI_FLAG_HONOR_PI) {
+	if (port_map) {
 		u32 tmp_port_map = port_map;
 		int n_ports = ahci_nr_ports(cap);
 
@@ -598,17 +578,26 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
 			}
 		}
 
-		/* Whine if inconsistent.  No need to update cap.
-		 * port_map is used to determine number of ports.
+		/* If n_ports and port_map are inconsistent, whine and
+		 * clear port_map and let it be generated from n_ports.
 		 */
-		if (n_ports || tmp_port_map)
+		if (n_ports || tmp_port_map) {
 			dev_printk(KERN_WARNING, &pdev->dev,
 				   "nr_ports (%u) and implemented port map "
-				   "(0x%x) don't match\n",
+				   "(0x%x) don't match, using nr_ports\n",
 				   ahci_nr_ports(cap), port_map);
-	} else {
-		/* fabricate port_map from cap.nr_ports */
+			port_map = 0;
+		}
+	}
+
+	/* fabricate port_map from cap.nr_ports */
+	if (!port_map) {
 		port_map = (1 << ahci_nr_ports(cap)) - 1;
+		dev_printk(KERN_WARNING, &pdev->dev,
+			   "forcing PORTS_IMPL to 0x%x\n", port_map);
+
+		/* write the fixed up value to the PI register */
+		hpriv->saved_port_map = port_map;
 	}
 
 	/* record values to use during operation */
-- 
cgit v1.2.3-70-g09d2


From 3f19859ee95a38c066a0420eb8a30c76ecd67a42 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 2 Sep 2007 23:23:57 +0900
Subject: libata: update ata_dev_try_classify() arguments

Make ata_dev_try_classify() take a pointer to ata_device instead of
ata_port/port_number combination for consistency and add @present
argument.  @present indicates whether the device seems present during
reset.  It's the result of TF access during softreset and link
onlineness during hardreset.  @present will be used to improve
diagnostic failure handling.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 30 ++++++++++++++++--------------
 drivers/ata/pata_scc.c    |  6 ++++--
 drivers/ata/sata_mv.c     |  2 +-
 include/linux/libata.h    |  3 ++-
 4 files changed, 23 insertions(+), 18 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b01b5a897dc..ea8c07b04f2 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -701,8 +701,8 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
 
 /**
  *	ata_dev_try_classify - Parse returned ATA device signature
- *	@ap: ATA channel to examine
- *	@device: Device to examine (starting at zero)
+ *	@dev: ATA device to classify (starting at zero)
+ *	@present: device seems present
  *	@r_err: Value of error register on completion
  *
  *	After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
@@ -720,15 +720,15 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
  *	RETURNS:
  *	Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
  */
-
-unsigned int
-ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
+unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
+				  u8 *r_err)
 {
+	struct ata_port *ap = dev->link->ap;
 	struct ata_taskfile tf;
 	unsigned int class;
 	u8 err;
 
-	ap->ops->dev_select(ap, device);
+	ap->ops->dev_select(ap, dev->devno);
 
 	memset(&tf, 0, sizeof(tf));
 
@@ -738,12 +738,12 @@ ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
 		*r_err = err;
 
 	/* see if device passed diags: if master then continue and warn later */
-	if (err == 0 && device == 0)
+	if (err == 0 && dev->devno == 0)
 		/* diagnostic fail : do nothing _YET_ */
-		ap->link.device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC;
+		dev->horkage |= ATA_HORKAGE_DIAGNOSTIC;
 	else if (err == 1)
 		/* do nothing */ ;
-	else if ((device == 0) && (err == 0x81))
+	else if ((dev->devno == 0) && (err == 0x81))
 		/* do nothing */ ;
 	else
 		return ATA_DEV_NONE;
@@ -3238,9 +3238,9 @@ void ata_bus_reset(struct ata_port *ap)
 	/*
 	 * determine by signature whether we have ATA or ATAPI devices
 	 */
-	device[0].class = ata_dev_try_classify(ap, 0, &err);
+	device[0].class = ata_dev_try_classify(&device[0], dev0, &err);
 	if ((slave_possible) && (err != 0x81))
-		device[1].class = ata_dev_try_classify(ap, 1, &err);
+		device[1].class = ata_dev_try_classify(&device[1], dev1, &err);
 
 	/* is double-select really necessary? */
 	if (device[1].class != ATA_DEV_NONE)
@@ -3479,9 +3479,11 @@ int ata_std_softreset(struct ata_link *link, unsigned int *classes,
 	}
 
 	/* determine by signature whether we have ATA or ATAPI devices */
-	classes[0] = ata_dev_try_classify(ap, 0, &err);
+	classes[0] = ata_dev_try_classify(&link->device[0],
+					  devmask & (1 << 0), &err);
 	if (slave_possible && err != 0x81)
-		classes[1] = ata_dev_try_classify(ap, 1, &err);
+		classes[1] = ata_dev_try_classify(&link->device[1],
+						  devmask & (1 << 1), &err);
 
  out:
 	DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
@@ -3600,7 +3602,7 @@ int sata_std_hardreset(struct ata_link *link, unsigned int *class,
 
 	ap->ops->dev_select(ap, 0);	/* probably unnecessary */
 
-	*class = ata_dev_try_classify(ap, 0, NULL);
+	*class = ata_dev_try_classify(link->device, 1, NULL);
 
 	DPRINTK("EXIT, class=%u\n", *class);
 	return 0;
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index 2153def3f34..941b72bec83 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -636,9 +636,11 @@ static int scc_std_softreset (struct ata_port *ap, unsigned int *classes,
 	}
 
 	/* determine by signature whether we have ATA or ATAPI devices */
-	classes[0] = ata_dev_try_classify(ap, 0, &err);
+	classes[0] = ata_dev_try_classify(&ap->link.device[0],
+					  devmask & (1 << 0), &err);
 	if (slave_possible && err != 0x81)
-		classes[1] = ata_dev_try_classify(ap, 1, &err);
+		classes[1] = ata_dev_try_classify(&ap->link.device[1],
+						  devmask & (1 << 1), &err);
 
  out:
 	DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 08077efa9af..4df8311968e 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2248,7 +2248,7 @@ comreset_retry:
 	 */
 
 	/* finally, read device signature from TF registers */
-	*class = ata_dev_try_classify(ap, 0, NULL);
+	*class = ata_dev_try_classify(ap->link.device, 1, NULL);
 
 	writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 49da62d0c83..3ab2196c651 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -781,7 +781,8 @@ extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
 			     unsigned long interval_msec,
 			     unsigned long timeout_msec);
-extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
+extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
+					 u8 *r_err);
 
 /*
  * Default driver ops implementations
-- 
cgit v1.2.3-70-g09d2


From d7fbee050753e153622b5d41bc8bd1cb19cda9b9 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 2 Sep 2007 23:24:48 +0900
Subject: libata: assume ATA_DEV_ATA on diagnostic failure

Certain device which reports diagnostic failure also reports invalid
device signature.  Assume ATA_DEV_ATA on diagnostic failure if reset
indicates device presence.

This is fix for bugzilla bug 8784.

  http://bugzilla.kernel.org/show_bug.cgi?id=8784

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Edward Amsden <amsden_linux@earthlink.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index ea8c07b04f2..2116f279458 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -751,10 +751,20 @@ unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
 	/* determine if device is ATA or ATAPI */
 	class = ata_dev_classify(&tf);
 
-	if (class == ATA_DEV_UNKNOWN)
-		return ATA_DEV_NONE;
-	if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
-		return ATA_DEV_NONE;
+	if (class == ATA_DEV_UNKNOWN) {
+		/* If the device failed diagnostic, it's likely to
+		 * have reported incorrect device signature too.
+		 * Assume ATA device if the device seems present but
+		 * device signature is invalid with diagnostic
+		 * failure.
+		 */
+		if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC))
+			class = ATA_DEV_ATA;
+		else
+			class = ATA_DEV_NONE;
+	} else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
+		class = ATA_DEV_NONE;
+
 	return class;
 }
 
-- 
cgit v1.2.3-70-g09d2


From d4155e6f13e931048036976d9fb47b5db53ee7a3 Mon Sep 17 00:00:00 2001
From: Jason Gaston <jason.d.gaston@intel.com>
Date: Thu, 20 Sep 2007 17:35:00 -0400
Subject: ahci: RAID mode SATA patch for Intel Tolapai

Signed-off-by: Jason Gaston <jason.d.gaston@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 57cc3e73a7e..b721569faaf 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -399,6 +399,8 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 	{ PCI_VDEVICE(INTEL, 0x292f), board_ahci }, /* ICH9M */
 	{ PCI_VDEVICE(INTEL, 0x294d), board_ahci }, /* ICH9 */
 	{ PCI_VDEVICE(INTEL, 0x294e), board_ahci }, /* ICH9M */
+	{ PCI_VDEVICE(INTEL, 0x502a), board_ahci }, /* Tolapai */
+	{ PCI_VDEVICE(INTEL, 0x502b), board_ahci }, /* Tolapai */
 
 	/* JMicron 360/1/3/5/6, match class to avoid IDE function */
 	{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
-- 
cgit v1.2.3-70-g09d2


From ad355b4628a19ba2af30409e13083edda221a5c9 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 21 Sep 2007 20:38:03 -0400
Subject: [libata] SCSI: support INQUIRY page 89h (ATA info page)

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-scsi.c | 72 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 68 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 7ad046b7c35..b39966299e7 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1803,6 +1803,61 @@ unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
 	return 0;
 }
 
+/**
+ *	ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
+ *	@args: device IDENTIFY data / SCSI command of interest.
+ *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
+ *	@buflen: Response buffer length.
+ *
+ *	Yields SAT-specified ATA VPD page.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ */
+
+unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
+			      unsigned int buflen)
+{
+	u8 pbuf[60];
+	struct ata_taskfile tf;
+	unsigned int i;
+
+	if (!buflen)
+		return 0;
+
+	memset(&pbuf, 0, sizeof(pbuf));
+	memset(&tf, 0, sizeof(tf));
+
+	pbuf[1] = 0x89;			/* our page code */
+	pbuf[2] = (0x238 >> 8);		/* page size fixed at 238h */
+	pbuf[3] = (0x238 & 0xff);
+
+	memcpy(&pbuf[8], "ATA     ", 8);
+	ata_id_string(args->id, &pbuf[16], ATA_ID_PROD, 16);
+	ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
+
+	/* we don't store the ATA device signature, so we fake it */
+
+	tf.command = ATA_DRDY;		/* really, this is Status reg */
+	tf.lbal = 0x1;
+	tf.nsect = 0x1;
+
+	ata_tf_to_fis(&tf, 0, 1, &pbuf[36]);	/* TODO: PMP? */
+	pbuf[36] = 0x34;		/* force D2H Reg FIS (34h) */
+
+	pbuf[56] = ATA_CMD_ID_ATA;
+
+	i = min(buflen, 60U);
+	memcpy(rbuf, &pbuf[0], i);
+	buflen -= i;
+
+	if (!buflen)
+		return 0;
+
+	memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
+	return 0;
+}
+
 /**
  *	ata_scsiop_noop - Command handler that simply returns success.
  *	@args: device IDENTIFY data / SCSI command of interest.
@@ -2880,14 +2935,23 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
 				ata_scsi_invalid_field(cmd, done);
 			else if ((scsicmd[1] & 1) == 0)    /* is EVPD clear? */
 				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
-			else if (scsicmd[2] == 0x00)
+			else switch (scsicmd[2]) {
+			case 0x00:
 				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
-			else if (scsicmd[2] == 0x80)
+				break;
+			case 0x80:
 				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
-			else if (scsicmd[2] == 0x83)
+				break;
+			case 0x83:
 				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
-			else
+				break;
+			case 0x89:
+				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
+				break;
+			default:
 				ata_scsi_invalid_field(cmd, done);
+				break;
+			}
 			break;
 
 		case MODE_SENSE:
-- 
cgit v1.2.3-70-g09d2


From 453941455218a81eedcea5dbafa38b8815920a8c Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 21 Sep 2007 06:23:42 -0400
Subject: [libata] Slightly improved no-op REQUEST SENSE, SEND DIAGNOSTIC

A few pedantic apps care about missing or lame "mandatory" SCSI
commands, so

REQUEST SENSE -- as we autosense, R.S. just returns zeroes

SEND DIAGNOSTIC -- our default (no-op) self-test succeeds, all
		   other requests for testing fail.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-scsi.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index b39966299e7..79550908adc 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2912,6 +2912,7 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
 {
 	struct ata_scsi_args args;
 	const u8 *scsicmd = cmd->cmnd;
+	u8 tmp8;
 
 	args.dev = dev;
 	args.id = dev->id;
@@ -2926,7 +2927,6 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
 		case SEEK_10:
 		case TEST_UNIT_READY:
 		case FORMAT_UNIT:		/* FIXME: correct? */
-		case SEND_DIAGNOSTIC:		/* FIXME: correct? */
 			ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
 			break;
 
@@ -2979,8 +2979,19 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
 			ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
 			break;
 
-		/* mandatory commands we haven't implemented yet */
 		case REQUEST_SENSE:
+			ata_scsi_set_sense(cmd, 0, 0, 0);
+			cmd->result = (DRIVER_SENSE << 24);
+			done(cmd);
+			break;
+
+		case SEND_DIAGNOSTIC:
+			tmp8 = scsicmd[1] & ~(1 << 3);
+			if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
+				ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
+			else
+				ata_scsi_invalid_field(cmd, done);
+			break;
 
 		/* all other commands */
 		default:
-- 
cgit v1.2.3-70-g09d2


From 00bd02027fc4a5cf92a3e538896b3642b40515df Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 21 Sep 2007 07:26:08 -0400
Subject: [libata] SCSI: improve FORMAT UNIT; minor code cleanups

* SAT specifies that FORMAT UNIT should be translated into a series
  of READ and WRITE commands that zero the ATA device.  That is far too
  cumbersome to bother with.

  Since we don't actually format the device, the old behavior of
  always returning success was inaccurate.  Change FORMAT UNIT from
  returning success immediately (old behavior) to always returning
  an error (new behavior).

* Add some comments around SYNCHRONIZE CACHE

* Shuffle scsi command code around a bit, so that things are close
  to alphabetic order.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
 drivers/ata/libata-scsi.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 79550908adc..553488015e4 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2920,14 +2920,9 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
 	args.done = done;
 
 	switch(scsicmd[0]) {
-		/* no-op's, complete with success */
-		case SYNCHRONIZE_CACHE:
-		case REZERO_UNIT:
-		case SEEK_6:
-		case SEEK_10:
-		case TEST_UNIT_READY:
-		case FORMAT_UNIT:		/* FIXME: correct? */
-			ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
+		/* TODO: worth improving? */
+		case FORMAT_UNIT:
+			ata_scsi_invalid_field(cmd, done);
 			break;
 
 		case INQUIRY:
@@ -2985,6 +2980,20 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
 			done(cmd);
 			break;
 
+		/* if we reach this, then writeback caching is disabled,
+		 * turning this into a no-op.
+		 */
+		case SYNCHRONIZE_CACHE:
+			/* fall through */
+
+		/* no-op's, complete with success */
+		case REZERO_UNIT:
+		case SEEK_6:
+		case SEEK_10:
+		case TEST_UNIT_READY:
+			ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
+			break;
+
 		case SEND_DIAGNOSTIC:
 			tmp8 = scsicmd[1] & ~(1 << 3);
 			if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
-- 
cgit v1.2.3-70-g09d2


From 24f756866676b40446e361c1f87738707161da93 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 21 Sep 2007 07:54:49 -0400
Subject: [libata] SCSI: clean up R/W recovery mode page

Clear ARRE, we don't do auto-reallocation on reads, just on writes.

Also, hardcode the size of the array using RW_RECOVERY_MPAGE_LEN,
following the style of the surrounding code.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-scsi.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 553488015e4..d482b589a18 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -71,11 +71,10 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 #define ALL_SUB_MPAGES 0xff
 
 
-static const u8 def_rw_recovery_mpage[] = {
+static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
 	RW_RECOVERY_MPAGE,
 	RW_RECOVERY_MPAGE_LEN - 2,
-	(1 << 7) |	/* AWRE, sat-r06 say it shall be 0 */
-	    (1 << 6),	/* ARRE (auto read reallocation) */
+	(1 << 7),	/* AWRE */
 	0,		/* read retry count */
 	0, 0, 0, 0,
 	0,		/* write retry count */
-- 
cgit v1.2.3-70-g09d2


From c78968bb0f7714ceba1cdfa23714454fc98cefdf Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 21 Sep 2007 21:03:28 -0400
Subject: [libata] SCSI: simulator version, not device version, belongs in VPD

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 2 --
 drivers/ata/libata-scsi.c | 5 +++--
 drivers/ata/libata.h      | 1 +
 3 files changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 2116f279458..8d425064ce2 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -59,8 +59,6 @@
 
 #include "libata.h"
 
-#define DRV_VERSION	"2.21"	/* must be exactly four chars */
-
 
 /* debounce timing parameters in msecs { interval, duration, timeout } */
 const unsigned long sata_deb_timing_normal[]		= {   5,  100, 2000 };
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index d482b589a18..468d791a303 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1831,8 +1831,9 @@ unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
 	pbuf[2] = (0x238 >> 8);		/* page size fixed at 238h */
 	pbuf[3] = (0x238 & 0xff);
 
-	memcpy(&pbuf[8], "ATA     ", 8);
-	ata_id_string(args->id, &pbuf[16], ATA_ID_PROD, 16);
+	memcpy(&pbuf[8], "linux   ", 8);
+	memcpy(&pbuf[16], "libata          ", 16);
+	memcpy(&pbuf[32], DRV_VERSION, 4);
 	ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
 
 	/* we don't store the ATA device signature, so we fake it */
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 11f64a43b38..e45f6d5542d 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -29,6 +29,7 @@
 #define __LIBATA_H__
 
 #define DRV_NAME	"libata"
+#define DRV_VERSION	"2.21"	/* must be exactly four chars */
 
 struct ata_scsi_args {
 	struct ata_device	*dev;
-- 
cgit v1.2.3-70-g09d2


From 854c73a2f1c3bcc4aa88c25e208dc597e8efb795 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:11 +0900
Subject: libata: misc updates for AN

Update AN support in preparation of PMP support.

* s/ata_id_has_AN/ata_id_has_atapi_AN/
* add AN enabled reporting during configuration
* add err_mask to AN configuration failure reporting
* update LOCKING comment for ata_scsi_media_change_notify()
* check whether ATA dev is attached to SCSI dev ata_scsi_media_change_notify()
* set ATA_FLAG_AN in ahci and sata_sil24

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Kriten Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c        |  2 +-
 drivers/ata/libata-core.c | 24 ++++++++++++++----------
 drivers/ata/libata-scsi.c |  7 ++++---
 drivers/ata/sata_sil24.c  | 13 +++++++++++--
 include/linux/ata.h       |  2 +-
 5 files changed, 31 insertions(+), 17 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index b721569faaf..0a6b694f0d3 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -177,7 +177,7 @@ enum {
 
 	AHCI_FLAG_COMMON		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 					  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-					  ATA_FLAG_ACPI_SATA,
+					  ATA_FLAG_ACPI_SATA | ATA_FLAG_AN,
 	AHCI_LFLAG_COMMON		= ATA_LFLAG_SKIP_D2H_BSY,
 };
 
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 8d425064ce2..1daea1caf3e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2010,7 +2010,8 @@ int ata_dev_configure(struct ata_device *dev)
 
 	/* ATAPI-specific feature tests */
 	else if (dev->class == ATA_DEV_ATAPI) {
-		char *cdb_intr_string = "";
+		const char *cdb_intr_string = "";
+		const char *atapi_an_string = "";
 
 		rc = atapi_cdb_len(id);
 		if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
@@ -2026,16 +2027,19 @@ int ata_dev_configure(struct ata_device *dev)
 		 * check to see if this ATAPI device supports
 		 * Asynchronous Notification
 		 */
-		if ((ap->flags & ATA_FLAG_AN) && ata_id_has_AN(id)) {
-			int err;
+		if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id)) {
+			unsigned int err_mask;
+
 			/* issue SET feature command to turn this on */
-			err = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE);
-			if (err)
+			err_mask = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE);
+			if (err_mask)
 				ata_dev_printk(dev, KERN_ERR,
-						"unable to set AN, err %x\n",
-						err);
-			else
+					"failed to enable ATAPI AN "
+					"(err_mask=0x%x)\n", err_mask);
+			else {
 				dev->flags |= ATA_DFLAG_AN;
+				atapi_an_string = ", ATAPI AN";
+			}
 		}
 
 		if (ata_id_cdb_intr(dev->id)) {
@@ -2046,10 +2050,10 @@ int ata_dev_configure(struct ata_device *dev)
 		/* print device info to dmesg */
 		if (ata_msg_drv(ap) && print_info)
 			ata_dev_printk(dev, KERN_INFO,
-				       "ATAPI: %s, %s, max %s%s\n",
+				       "ATAPI: %s, %s, max %s%s%s\n",
 				       modelbuf, fwrevbuf,
 				       ata_mode_string(xfer_mask),
-				       cdb_intr_string);
+				       cdb_intr_string, atapi_an_string);
 	}
 
 	/* determine max_sectors */
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 468d791a303..dc274001ddd 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3238,12 +3238,13 @@ static void ata_scsi_handle_link_detach(struct ata_link *link)
  *	event.
  *
  * 	LOCKING:
- * 	interrupt context, may not sleep.
+ * 	spin_lock_irqsave(host lock)
  */
-void ata_scsi_media_change_notify(struct ata_device *atadev)
+void ata_scsi_media_change_notify(struct ata_device *dev)
 {
 #ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
-	scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE);
+	if (dev->sdev)
+		scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
 #endif
 }
 EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 3dcb223117b..d9c010ab228 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -168,7 +168,7 @@ enum {
 
 	DEF_PORT_IRQ		= PORT_IRQ_COMPLETE | PORT_IRQ_ERROR |
 				  PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG |
-				  PORT_IRQ_UNK_FIS,
+				  PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_NOTIFY,
 
 	/* bits[27:16] are unmasked (raw) */
 	PORT_IRQ_RAW_SHIFT	= 16,
@@ -237,7 +237,8 @@ enum {
 	/* host flags */
 	SIL24_COMMON_FLAGS	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 				  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-				  ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA,
+				  ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA |
+				  ATA_FLAG_AN,
 	SIL24_COMMON_LFLAGS	= ATA_LFLAG_SKIP_D2H_BSY,
 	SIL24_FLAG_PCIX_IRQ_WOC	= (1 << 24), /* IRQ loss errata on PCI-X */
 
@@ -818,6 +819,14 @@ static void sil24_error_intr(struct ata_port *ap)
 
 	ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
 
+	if (irq_stat & PORT_IRQ_SDB_NOTIFY) {
+		struct ata_device *dev = ap->link.device;
+
+		ata_ehi_push_desc(ehi, "SDB notify");
+		if (dev->flags & ATA_DFLAG_AN)
+			ata_scsi_media_change_notify(dev);
+	}
+
 	if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
 		ata_ehi_hotplugged(ehi);
 		ata_ehi_push_desc(ehi, "%s",
diff --git a/include/linux/ata.h b/include/linux/ata.h
index a749f006387..21f00a0646d 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -353,7 +353,7 @@ struct ata_taskfile {
 #define ata_id_queue_depth(id)	(((id)[75] & 0x1f) + 1)
 #define ata_id_removeable(id)	((id)[0] & (1 << 7))
 #define ata_id_has_dword_io(id)	((id)[48] & (1 << 0))
-#define ata_id_has_AN(id)	\
+#define ata_id_has_atapi_AN(id)	\
 	( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
 	  ((id)[78] & (1 << 5)) )
 #define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
-- 
cgit v1.2.3-70-g09d2


From 422c9daa8b5bea09f3393b11a106afd68850b39b Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:12 +0900
Subject: libata-pmp-prep: add @new_class to ata_dev_revalidate()

Consider newly found class code while revalidating.  PMP resetting
always results in valid class code and issuing PMP commands to
ATA/ATAPI device isn't very attractive.  Add @new_class to
ata_dev_revalidate() and check class code for revalidation.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 15 +++++++++++++--
 drivers/ata/libata-eh.c   |  3 ++-
 drivers/ata/libata.h      |  3 ++-
 3 files changed, 17 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 1daea1caf3e..c046c5e1e5d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2846,7 +2846,7 @@ static int ata_dev_set_mode(struct ata_device *dev)
 	}
 
 	ehc->i.flags |= ATA_EHI_POST_SETMODE;
-	rc = ata_dev_revalidate(dev, 0);
+	rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
 	ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
 	if (rc)
 		return rc;
@@ -3750,6 +3750,7 @@ int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
 /**
  *	ata_dev_revalidate - Revalidate ATA device
  *	@dev: device to revalidate
+ *	@new_class: new class code
  *	@readid_flags: read ID flags
  *
  *	Re-read IDENTIFY page, make sure @dev is still attached to the
@@ -3761,7 +3762,8 @@ int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
  *	RETURNS:
  *	0 on success, negative errno otherwise
  */
-int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
+int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
+		       unsigned int readid_flags)
 {
 	u64 n_sectors = dev->n_sectors;
 	int rc;
@@ -3769,6 +3771,15 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
 	if (!ata_dev_enabled(dev))
 		return -ENODEV;
 
+	/* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
+	if (ata_class_enabled(new_class) &&
+	    new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
+		ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
+			       dev->class, new_class);
+		rc = -ENODEV;
+		goto fail;
+	}
+
 	/* re-read ID */
 	rc = ata_dev_reread_id(dev, readid_flags);
 	if (rc)
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index daa2f74f73c..eb087bbc477 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2104,7 +2104,8 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
 			}
 
 			ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE);
-			rc = ata_dev_revalidate(dev, readid_flags);
+			rc = ata_dev_revalidate(dev, ehc->classes[dev->devno],
+						readid_flags);
 			if (rc)
 				goto err;
 
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index e45f6d5542d..d4d369908c0 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -78,7 +78,8 @@ extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 			   unsigned int flags, u16 *id);
 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
-extern int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags);
+extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
+			      unsigned int readid_flags);
 extern int ata_dev_configure(struct ata_device *dev);
 extern int sata_down_spd_limit(struct ata_link *link);
 extern int sata_set_spd_needed(struct ata_link *link);
-- 
cgit v1.2.3-70-g09d2


From fb7fd61454c8681cd2621051a710b78a00369203 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:12 +0900
Subject: libata-pmp-prep: make a number of functions global to libata

Make a number of functions from libata-core.c and libata-eh.c global
to libata (drivers/ata/libata.h).  These will be used by PMP.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c |  4 ++--
 drivers/ata/libata-eh.c   | 31 +++++++++++++++----------------
 drivers/ata/libata.h      | 17 +++++++++++++++++
 3 files changed, 34 insertions(+), 18 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c046c5e1e5d..9467c2f6019 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6218,7 +6218,7 @@ void ata_dev_init(struct ata_device *dev)
  *	LOCKING:
  *	Kernel thread context (may sleep)
  */
-static void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
+void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
 {
 	int i;
 
@@ -6253,7 +6253,7 @@ static void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
  *	RETURNS:
  *	0 on success, -errno on failure.
  */
-static int sata_link_init_spd(struct ata_link *link)
+int sata_link_init_spd(struct ata_link *link)
 {
 	u32 scontrol, spd;
 	int rc;
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index eb087bbc477..1d3b0dccfb0 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -74,7 +74,6 @@ static const unsigned long ata_eh_reset_timeouts[] = {
 };
 
 static void __ata_port_freeze(struct ata_port *ap);
-static void ata_eh_finish(struct ata_port *ap);
 #ifdef CONFIG_PM
 static void ata_eh_handle_port_suspend(struct ata_port *ap);
 static void ata_eh_handle_port_resume(struct ata_port *ap);
@@ -1015,7 +1014,7 @@ void ata_eh_qc_retry(struct ata_queued_cmd *qc)
  *	LOCKING:
  *	None.
  */
-static void ata_eh_detach_dev(struct ata_device *dev)
+void ata_eh_detach_dev(struct ata_device *dev)
 {
 	struct ata_link *link = dev->link;
 	struct ata_port *ap = link->ap;
@@ -1052,8 +1051,8 @@ static void ata_eh_detach_dev(struct ata_device *dev)
  *	LOCKING:
  *	None.
  */
-static void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
-			       unsigned int action)
+void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
+			unsigned int action)
 {
 	struct ata_port *ap = link->ap;
 	struct ata_eh_info *ehi = &link->eh_info;
@@ -1095,8 +1094,8 @@ static void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
  *	LOCKING:
  *	None.
  */
-static void ata_eh_done(struct ata_link *link, struct ata_device *dev,
-			unsigned int action)
+void ata_eh_done(struct ata_link *link, struct ata_device *dev,
+		 unsigned int action)
 {
 	struct ata_eh_context *ehc = &link->eh_context;
 
@@ -1756,7 +1755,7 @@ static void ata_eh_link_autopsy(struct ata_link *link)
  *	LOCKING:
  *	Kernel thread context (may sleep).
  */
-static void ata_eh_autopsy(struct ata_port *ap)
+void ata_eh_autopsy(struct ata_port *ap)
 {
 	struct ata_link *link;
 
@@ -1867,7 +1866,7 @@ static void ata_eh_link_report(struct ata_link *link)
  *	LOCKING:
  *	None.
  */
-static void ata_eh_report(struct ata_port *ap)
+void ata_eh_report(struct ata_port *ap)
 {
 	struct ata_link *link;
 
@@ -1918,9 +1917,9 @@ static int ata_eh_followup_srst_needed(int rc, int classify,
 	return 0;
 }
 
-static int ata_eh_reset(struct ata_link *link, int classify,
-			ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
-			ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
+int ata_eh_reset(struct ata_link *link, int classify,
+		 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
+		 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
 {
 	struct ata_eh_context *ehc = &link->eh_context;
 	unsigned int *classes = ehc->classes;
@@ -2296,10 +2295,10 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
  *	RETURNS:
  *	0 on success, -errno on failure.
  */
-static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
-			  ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
-			  ata_postreset_fn_t postreset,
-			  struct ata_link **r_failed_link)
+int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
+		   ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
+		   ata_postreset_fn_t postreset,
+		   struct ata_link **r_failed_link)
 {
 	struct ata_link *link;
 	struct ata_device *dev;
@@ -2445,7 +2444,7 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
  *	LOCKING:
  *	None.
  */
-static void ata_eh_finish(struct ata_port *ap)
+void ata_eh_finish(struct ata_port *ap)
 {
 	int tag;
 
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index d4d369908c0..0f3e355fdfd 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -95,6 +95,8 @@ extern void ata_dev_select(struct ata_port *ap, unsigned int device,
 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
 extern int ata_flush_cache(struct ata_device *dev);
 extern void ata_dev_init(struct ata_device *dev);
+extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
+extern int sata_link_init_spd(struct ata_link *link);
 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
 extern struct ata_port *ata_port_alloc(struct ata_host *host);
@@ -156,6 +158,21 @@ extern void ata_scsi_error(struct Scsi_Host *host);
 extern void ata_port_wait_eh(struct ata_port *ap);
 extern void ata_eh_fastdrain_timerfn(unsigned long arg);
 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
+extern void ata_eh_detach_dev(struct ata_device *dev);
+extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
+			       unsigned int action);
+extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
+			unsigned int action);
+extern void ata_eh_autopsy(struct ata_port *ap);
+extern void ata_eh_report(struct ata_port *ap);
+extern int ata_eh_reset(struct ata_link *link, int classify,
+			ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
+			ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
+extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
+			  ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
+			  ata_postreset_fn_t postreset,
+			  struct ata_link **r_failed_disk);
+extern void ata_eh_finish(struct ata_port *ap);
 
 /* libata-sff.c */
 extern u8 ata_irq_on(struct ata_port *ap);
-- 
cgit v1.2.3-70-g09d2


From 31cc23b34913bc173680bdc87af79e551bf8cc0d Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:12 +0900
Subject: libata-pmp-prep: implement ops->qc_defer()

Controllers which support PMP have various restrictions on which
combinations of commands are allowed to what number of devices
concurrently.  This patch implements ops->qc_defer() which determines
whether a qc can be issued at the moment or should be deferred.

If the function returns ATA_DEFER_LINK, the qc will be deferred until
a qc completes on the link.  If ATA_DEFER_PORT, until a qc completes
on any link.  The defer conditions are advisory and in general
ATA_DEFER_LINK can be considered as lower priority deferring than
ATA_DEFER_PORT.

ops->qc_defer() replaces fixed ata_scmd_need_defer().  For standard
NCQ/non-NCQ exclusion, ata_std_qc_defer() is implemented.  ahci and
sata_sil24 are converted to use ata_std_qc_defer().

ops->qc_defer() is heavier than the original mechanism because full qc
is prepped before determining to defer it, but various information is
needed to determine defer conditinos and fully translating a qc is the
only way to supply such information in generic manner.

IMHO, this shouldn't cause any noticeable performance issues as

* for most cases deferring occurs rarely (except for NCQ-aware
  cmd-switching PMP)
* translation itself isn't that expensive
* once deferred the command won't be repeated until another command
  completes which usually is a very long time cpu-wise.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c        |  2 ++
 drivers/ata/libata-core.c | 31 ++++++++++++++++++++++++
 drivers/ata/libata-scsi.c | 62 ++++++++++++++++++++---------------------------
 drivers/ata/sata_nv.c     |  1 +
 drivers/ata/sata_sil24.c  |  1 +
 include/linux/libata.h    |  6 +++++
 6 files changed, 67 insertions(+), 36 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 0a6b694f0d3..cf3404467ce 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -268,6 +268,7 @@ static const struct ata_port_operations ahci_ops = {
 
 	.tf_read		= ahci_tf_read,
 
+	.qc_defer		= ata_std_qc_defer,
 	.qc_prep		= ahci_qc_prep,
 	.qc_issue		= ahci_qc_issue,
 
@@ -298,6 +299,7 @@ static const struct ata_port_operations ahci_vt8251_ops = {
 
 	.tf_read		= ahci_tf_read,
 
+	.qc_defer		= ata_std_qc_defer,
 	.qc_prep		= ahci_qc_prep,
 	.qc_issue		= ahci_qc_issue,
 
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 9467c2f6019..b666f51da7e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4345,6 +4345,36 @@ int ata_check_atapi_dma(struct ata_queued_cmd *qc)
 	return 0;
 }
 
+/**
+ *	ata_std_qc_defer - Check whether a qc needs to be deferred
+ *	@qc: ATA command in question
+ *
+ *	Non-NCQ commands cannot run with any other command, NCQ or
+ *	not.  As upper layer only knows the queue depth, we are
+ *	responsible for maintaining exclusion.  This function checks
+ *	whether a new command @qc can be issued.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ *
+ *	RETURNS:
+ *	ATA_DEFER_* if deferring is needed, 0 otherwise.
+ */
+int ata_std_qc_defer(struct ata_queued_cmd *qc)
+{
+	struct ata_link *link = qc->dev->link;
+
+	if (qc->tf.protocol == ATA_PROT_NCQ) {
+		if (!ata_tag_valid(link->active_tag))
+			return 0;
+	} else {
+		if (!ata_tag_valid(link->active_tag) && !link->sactive)
+			return 0;
+	}
+
+	return ATA_DEFER_LINK;
+}
+
 /**
  *	ata_qc_prep - Prepare taskfile for submission
  *	@qc: Metadata associated with taskfile to be prepared
@@ -7111,6 +7141,7 @@ EXPORT_SYMBOL_GPL(ata_interrupt);
 EXPORT_SYMBOL_GPL(ata_do_set_mode);
 EXPORT_SYMBOL_GPL(ata_data_xfer);
 EXPORT_SYMBOL_GPL(ata_data_xfer_noirq);
+EXPORT_SYMBOL_GPL(ata_std_qc_defer);
 EXPORT_SYMBOL_GPL(ata_qc_prep);
 EXPORT_SYMBOL_GPL(ata_dumb_qc_prep);
 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index dc274001ddd..8ca2caeed01 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -749,6 +749,13 @@ static void ata_scsi_sdev_config(struct scsi_device *sdev)
 {
 	sdev->use_10_for_rw = 1;
 	sdev->use_10_for_ms = 1;
+
+	/* Schedule policy is determined by ->qc_defer() callback and
+	 * it needs to see every deferred qc.  Set dev_blocked to 1 to
+	 * prevent SCSI midlayer from automatically deferring
+	 * requests.
+	 */
+	sdev->max_device_blocked = 1;
 }
 
 static void ata_scsi_dev_config(struct scsi_device *sdev,
@@ -1415,37 +1422,6 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
 	ata_qc_free(qc);
 }
 
-/**
- *	ata_scmd_need_defer - Check whether we need to defer scmd
- *	@dev: ATA device to which the command is addressed
- *	@is_io: Is the command IO (and thus possibly NCQ)?
- *
- *	NCQ and non-NCQ commands cannot run together.  As upper layer
- *	only knows the queue depth, we are responsible for maintaining
- *	exclusion.  This function checks whether a new command can be
- *	issued to @dev.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host lock)
- *
- *	RETURNS:
- *	1 if deferring is needed, 0 otherwise.
- */
-static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
-{
-	struct ata_link *link = dev->link;
-	int is_ncq = is_io && ata_ncq_enabled(dev);
-
-	if (is_ncq) {
-		if (!ata_tag_valid(link->active_tag))
-			return 0;
-	} else {
-		if (!ata_tag_valid(link->active_tag) && !link->sactive)
-			return 0;
-	}
-	return 1;
-}
-
 /**
  *	ata_scsi_translate - Translate then issue SCSI command to ATA device
  *	@dev: ATA device to which the command is addressed
@@ -1477,14 +1453,12 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
 			      void (*done)(struct scsi_cmnd *),
 			      ata_xlat_func_t xlat_func)
 {
+	struct ata_port *ap = dev->link->ap;
 	struct ata_queued_cmd *qc;
-	int is_io = xlat_func == ata_scsi_rw_xlat;
+	int rc;
 
 	VPRINTK("ENTER\n");
 
-	if (unlikely(ata_scmd_need_defer(dev, is_io)))
-		goto defer;
-
 	qc = ata_scsi_qc_new(dev, cmd, done);
 	if (!qc)
 		goto err_mem;
@@ -1508,6 +1482,11 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
 	if (xlat_func(qc))
 		goto early_finish;
 
+	if (ap->ops->qc_defer) {
+		if ((rc = ap->ops->qc_defer(qc)))
+			goto defer;
+	}
+
 	/* select device, send command to hardware */
 	ata_qc_issue(qc);
 
@@ -1529,8 +1508,12 @@ err_mem:
 	return 0;
 
 defer:
+	ata_qc_free(qc);
 	DPRINTK("EXIT - defer\n");
-	return SCSI_MLQUEUE_DEVICE_BUSY;
+	if (rc == ATA_DEFER_LINK)
+		return SCSI_MLQUEUE_DEVICE_BUSY;
+	else
+		return SCSI_MLQUEUE_HOST_BUSY;
 }
 
 /**
@@ -3034,6 +3017,13 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
 		shost->max_channel = 1;
 		shost->max_cmd_len = 16;
 
+		/* Schedule policy is determined by ->qc_defer()
+		 * callback and it needs to see every deferred qc.
+		 * Set host_blocked to 1 to prevent SCSI midlayer from
+		 * automatically deferring requests.
+		 */
+		shost->max_host_blocked = 1;
+
 		rc = scsi_add_host(ap->scsi_host, ap->host->dev);
 		if (rc)
 			goto err_add;
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index b860f99fc28..40557fe2ffd 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -423,6 +423,7 @@ static const struct ata_port_operations nv_adma_ops = {
 	.bmdma_start		= ata_bmdma_start,
 	.bmdma_stop		= ata_bmdma_stop,
 	.bmdma_status		= ata_bmdma_status,
+	.qc_defer		= ata_std_qc_defer,
 	.qc_prep		= nv_adma_qc_prep,
 	.qc_issue		= nv_adma_qc_issue,
 	.freeze			= nv_adma_freeze,
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index d9c010ab228..9acfce43bde 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -393,6 +393,7 @@ static const struct ata_port_operations sil24_ops = {
 
 	.tf_read		= sil24_tf_read,
 
+	.qc_defer		= ata_std_qc_defer,
 	.qc_prep		= sil24_qc_prep,
 	.qc_issue		= sil24_qc_issue,
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index c3820f105ff..b0d4ca0d27b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -272,6 +272,10 @@ enum {
 	/* ering size */
 	ATA_ERING_SIZE		= 32,
 
+	/* return values for ->qc_defer */
+	ATA_DEFER_LINK		= 1,
+	ATA_DEFER_PORT		= 2,
+
 	/* desc_len for ata_eh_info and context */
 	ATA_EH_DESC_LEN		= 80,
 
@@ -639,6 +643,7 @@ struct ata_port_operations {
 
 	void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
 
+	int (*qc_defer) (struct ata_queued_cmd *qc);
 	void (*qc_prep) (struct ata_queued_cmd *qc);
 	unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
 
@@ -824,6 +829,7 @@ extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
 			  unsigned int buflen, int write_data);
 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
 				unsigned int buflen, int write_data);
+extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
 extern void ata_qc_prep(struct ata_queued_cmd *qc);
 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
-- 
cgit v1.2.3-70-g09d2


From da917d69d0ea63f5390716cba6e77f490ce96df9 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:12 +0900
Subject: libata-pmp-prep: implement qc_defer helpers

Implement ap->nr_active_links (the number of links with active qcs),
ap->excl_link (pointer to link which can be used by ->qc_defer and is
cleared when a qc with ATA_QCFLAG_CLEAR_EXCL completes), and
ata_link_active().

These can be used by ->qc_defer() to implement proper command
exclusion.  This set of helpers seem enough for both sil24 (ATAPI
exclusion needed) and cmd-switching PMP.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 22 ++++++++++++++++++++--
 drivers/ata/libata-eh.c   |  5 +++++
 include/linux/libata.h    |  8 ++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b666f51da7e..376dbd80cc9 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1390,6 +1390,7 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
 	struct ata_queued_cmd *qc;
 	unsigned int tag, preempted_tag;
 	u32 preempted_sactive, preempted_qc_active;
+	int preempted_nr_active_links;
 	DECLARE_COMPLETION_ONSTACK(wait);
 	unsigned long flags;
 	unsigned int err_mask;
@@ -1428,9 +1429,11 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
 	preempted_tag = link->active_tag;
 	preempted_sactive = link->sactive;
 	preempted_qc_active = ap->qc_active;
+	preempted_nr_active_links = ap->nr_active_links;
 	link->active_tag = ATA_TAG_POISON;
 	link->sactive = 0;
 	ap->qc_active = 0;
+	ap->nr_active_links = 0;
 
 	/* prepare & issue qc */
 	qc->tf = *tf;
@@ -1509,6 +1512,7 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
 	link->active_tag = preempted_tag;
 	link->sactive = preempted_sactive;
 	ap->qc_active = preempted_qc_active;
+	ap->nr_active_links = preempted_nr_active_links;
 
 	/* XXX - Some LLDDs (sata_mv) disable port on command failure.
 	 * Until those drivers are fixed, we detect the condition
@@ -5408,10 +5412,19 @@ void __ata_qc_complete(struct ata_queued_cmd *qc)
 		ata_sg_clean(qc);
 
 	/* command should be marked inactive atomically with qc completion */
-	if (qc->tf.protocol == ATA_PROT_NCQ)
+	if (qc->tf.protocol == ATA_PROT_NCQ) {
 		link->sactive &= ~(1 << qc->tag);
-	else
+		if (!link->sactive)
+			ap->nr_active_links--;
+	} else {
 		link->active_tag = ATA_TAG_POISON;
+		ap->nr_active_links--;
+	}
+
+	/* clear exclusive status */
+	if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
+		     ap->excl_link == link))
+		ap->excl_link = NULL;
 
 	/* atapi: mark qc as inactive to prevent the interrupt handler
 	 * from completing the command twice later, before the error handler
@@ -5590,9 +5603,14 @@ void ata_qc_issue(struct ata_queued_cmd *qc)
 
 	if (qc->tf.protocol == ATA_PROT_NCQ) {
 		WARN_ON(link->sactive & (1 << qc->tag));
+
+		if (!link->sactive)
+			ap->nr_active_links++;
 		link->sactive |= 1 << qc->tag;
 	} else {
 		WARN_ON(link->sactive);
+
+		ap->nr_active_links++;
 		link->active_tag = qc->tag;
 	}
 
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 1d3b0dccfb0..5244723952c 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -451,6 +451,7 @@ void ata_scsi_error(struct Scsi_Host *host)
 
 		ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS;
 		ap->pflags &= ~ATA_PFLAG_EH_PENDING;
+		ap->excl_link = NULL;	/* don't maintain exclusion over EH */
 
 		spin_unlock_irqrestore(ap->lock, flags);
 
@@ -2474,6 +2475,10 @@ void ata_eh_finish(struct ata_port *ap)
 			}
 		}
 	}
+
+	/* make sure nr_active_links is zero after EH */
+	WARN_ON(ap->nr_active_links);
+	ap->nr_active_links = 0;
 }
 
 /**
diff --git a/include/linux/libata.h b/include/linux/libata.h
index b0d4ca0d27b..f9f81fd9329 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -216,6 +216,7 @@ enum {
 	ATA_QCFLAG_DMAMAP	= ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
 	ATA_QCFLAG_IO		= (1 << 3), /* standard IO command */
 	ATA_QCFLAG_RESULT_TF	= (1 << 4), /* result TF requested */
+	ATA_QCFLAG_CLEAR_EXCL	= (1 << 5), /* clear excl_link on completion */
 
 	ATA_QCFLAG_FAILED	= (1 << 16), /* cmd failed and is owned by EH */
 	ATA_QCFLAG_SENSE_VALID	= (1 << 17), /* sense data valid */
@@ -579,11 +580,13 @@ struct ata_port {
 	struct ata_queued_cmd	qcmd[ATA_MAX_QUEUE];
 	unsigned long		qc_allocated;
 	unsigned int		qc_active;
+	int			nr_active_links; /* #links with active qcs */
 
 	struct ata_link		link;	/* host default link */
 
 	int			nr_pmp_links;	/* nr of available PMP links */
 	struct ata_link		*pmp_link;	/* array of PMP links */
+	struct ata_link		*excl_link;	/* for PMP qc exclusion */
 
 	struct ata_port_stats	stats;
 	struct ata_host		*host;
@@ -1104,6 +1107,11 @@ static inline int ata_link_max_devices(const struct ata_link *link)
 	return 1;
 }
 
+static inline int ata_link_active(struct ata_link *link)
+{
+	return ata_tag_valid(link->active_tag) || link->sactive;
+}
+
 static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
 {
 	if (ap->nr_pmp_links)
-- 
cgit v1.2.3-70-g09d2


From ae791c05694d7391ee9261a0450a50f7e95aedfd Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:12 +0900
Subject: libata-pmp-prep: implement ATA_LFLAG_NO_SRST, ASSUME_ATA and
 ASSUME_SEMB

Some links on some PMPs locks up on SRST and/or report incorrect
device signature.  Implement ATA_LFLAG_NO_SRST, ASSUME_ATA and
ASSUME_SEMB to handle these quirky links.  NO_SRST makes EH avoid
SRST.  ASSUME_ATA and SEMB forces class code to ATA and SEMB_UNSUP
respectively.  Note that SEMB isn't currently supported yet so the
_UNSUP variant is used.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 42 ++++++++++++++++++++++++++++++++----------
 include/linux/libata.h  |  4 ++++
 2 files changed, 36 insertions(+), 10 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 5244723952c..7be04bd30bf 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1906,14 +1906,18 @@ static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset,
 	return 0;
 }
 
-static int ata_eh_followup_srst_needed(int rc, int classify,
+static int ata_eh_followup_srst_needed(struct ata_link *link,
+				       int rc, int classify,
 				       const unsigned int *classes)
 {
+	if (link->flags & ATA_LFLAG_NO_SRST)
+		return 0;
 	if (rc == -EAGAIN)
 		return 1;
 	if (rc != 0)
 		return 0;
-	if (classify && classes[0] == ATA_DEV_UNKNOWN)
+	if (classify && !(link->flags & ATA_LFLAG_ASSUME_CLASS) &&
+	    classes[0] == ATA_DEV_UNKNOWN)
 		return 1;
 	return 0;
 }
@@ -1940,7 +1944,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	 */
 	action = ehc->i.action;
 	ehc->i.action &= ~ATA_EH_RESET_MASK;
-	if (softreset && (!hardreset || (!sata_set_spd_needed(link) &&
+	if (softreset && (!hardreset || (!(link->flags & ATA_LFLAG_NO_SRST) &&
+					 !sata_set_spd_needed(link) &&
 					 !(action & ATA_EH_HARDRESET))))
 		ehc->i.action |= ATA_EH_SOFTRESET;
 	else
@@ -2003,7 +2008,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	rc = ata_do_reset(link, reset, classes, deadline);
 
 	if (reset == hardreset &&
-	    ata_eh_followup_srst_needed(rc, classify, classes)) {
+	    ata_eh_followup_srst_needed(link, rc, classify, classes)) {
 		/* okay, let's do follow-up softreset */
 		reset = softreset;
 
@@ -2018,8 +2023,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
 		ata_eh_about_to_do(link, NULL, ATA_EH_RESET_MASK);
 		rc = ata_do_reset(link, reset, classes, deadline);
 
-		if (rc == 0 && classify &&
-		    classes[0] == ATA_DEV_UNKNOWN) {
+		if (rc == 0 && classify && classes[0] == ATA_DEV_UNKNOWN &&
+		    !(link->flags & ATA_LFLAG_ASSUME_CLASS)) {
 			ata_link_printk(link, KERN_ERR,
 					"classification failed\n");
 			rc = -EINVAL;
@@ -2027,6 +2032,10 @@ int ata_eh_reset(struct ata_link *link, int classify,
 		}
 	}
 
+	/* if we skipped follow-up srst, clear rc */
+	if (rc == -EAGAIN)
+		rc = 0;
+
 	if (rc && try < ARRAY_SIZE(ata_eh_reset_timeouts)) {
 		unsigned long now = jiffies;
 
@@ -2051,12 +2060,25 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	if (rc == 0) {
 		u32 sstatus;
 
-		/* After the reset, the device state is PIO 0 and the
-		 * controller state is undefined.  Record the mode.
-		 */
-		ata_link_for_each_dev(dev, link)
+		ata_link_for_each_dev(dev, link) {
+			/* After the reset, the device state is PIO 0
+			 * and the controller state is undefined.
+			 * Record the mode.
+			 */
 			dev->pio_mode = XFER_PIO_0;
 
+			if (ata_link_offline(link))
+				continue;
+
+			/* apply class override and convert UNKNOWN to NONE */
+			if (link->flags & ATA_LFLAG_ASSUME_ATA)
+				classes[dev->devno] = ATA_DEV_ATA;
+			else if (link->flags & ATA_LFLAG_ASSUME_SEMB)
+				classes[dev->devno] = ATA_DEV_SEMB_UNSUP; /* not yet */
+			else if (classes[dev->devno] == ATA_DEV_UNKNOWN)
+				classes[dev->devno] = ATA_DEV_NONE;
+		}
+
 		/* record current link speed */
 		if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0)
 			link->sata_spd = (sstatus >> 4) & 0xf;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index f9f81fd9329..6266fffb0eb 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -165,6 +165,10 @@ enum {
 	ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
 	ATA_LFLAG_SKIP_D2H_BSY	= (1 << 1), /* can't wait for the first D2H
 					     * Register FIS clearing BSY */
+	ATA_LFLAG_NO_SRST	= (1 << 2), /* avoid softreset */
+	ATA_LFLAG_ASSUME_ATA	= (1 << 3), /* assume ATA class */
+	ATA_LFLAG_ASSUME_SEMB	= (1 << 4), /* assume SEMB class */
+	ATA_LFLAG_ASSUME_CLASS	= ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
 
 	/* struct ata_port flags */
 	ATA_FLAG_SLAVE_POSS	= (1 << 0), /* host supports slave dev */
-- 
cgit v1.2.3-70-g09d2


From fd995f7039f1955ccc6b43e1e2d168060b31e4b2 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:12 +0900
Subject: libata-pmp-prep: implement ATA_LFLAG_NO_RETRY

Some PMP links are connected to internal pseudo devices which may come
and go depending on situation.  There's no reason to try hard to
recover them.  ATA_LFLAG_NO_RETRY tells EH to not retry if the device
attached to the link fails.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 5 ++++-
 include/linux/libata.h  | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 7be04bd30bf..8f8ed4dfb17 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2335,7 +2335,10 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 		struct ata_eh_context *ehc = &link->eh_context;
 
 		ata_link_for_each_dev(dev, link) {
-			ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
+			if (link->flags & ATA_LFLAG_NO_RETRY)
+				ehc->tries[dev->devno] = 1;
+			else
+				ehc->tries[dev->devno] = ATA_EH_DEV_TRIES;
 
 			/* collect port action mask recorded in dev actions */
 			ehc->i.action |= ehc->i.dev_action[dev->devno] &
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 6266fffb0eb..adeee7397cd 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -169,6 +169,7 @@ enum {
 	ATA_LFLAG_ASSUME_ATA	= (1 << 3), /* assume ATA class */
 	ATA_LFLAG_ASSUME_SEMB	= (1 << 4), /* assume SEMB class */
 	ATA_LFLAG_ASSUME_CLASS	= ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
+	ATA_LFLAG_NO_RETRY	= (1 << 5), /* don't retry this link */
 
 	/* struct ata_port flags */
 	ATA_FLAG_SLAVE_POSS	= (1 << 0), /* host supports slave dev */
-- 
cgit v1.2.3-70-g09d2


From f9df58cb27dfd605eced643bb3aa599fe4feeee8 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:13 +0900
Subject: libata-pmp-prep: implement ATA_LFLAG_DISABLED

Implement ATA_LFLAG_DISABLED.  The flag indicates the link is disabled
due to EH recovery failure.  While a link is disabled, no EH action is
taken on the link and suspend/resume become noop too.

This will be used by PMP links to manage failed links.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 30 +++++++++++++++++++++++++++++-
 include/linux/libata.h  |  3 +++
 2 files changed, 32 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 8f8ed4dfb17..fbbf7916390 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1308,6 +1308,7 @@ static void ata_eh_analyze_serror(struct ata_link *link)
 	struct ata_eh_context *ehc = &link->eh_context;
 	u32 serror = ehc->i.serror;
 	unsigned int err_mask = 0, action = 0;
+	u32 hotplug_mask;
 
 	if (serror & SERR_PERSISTENT) {
 		err_mask |= AC_ERR_ATA_BUS;
@@ -1326,7 +1327,20 @@ static void ata_eh_analyze_serror(struct ata_link *link)
 		err_mask |= AC_ERR_SYSTEM;
 		action |= ATA_EH_HARDRESET;
 	}
-	if (serror & (SERR_PHYRDY_CHG | SERR_DEV_XCHG))
+
+	/* Determine whether a hotplug event has occurred.  Both
+	 * SError.N/X are considered hotplug events for enabled or
+	 * host links.  For disabled PMP links, only N bit is
+	 * considered as X bit is left at 1 for link plugging.
+	 */
+	hotplug_mask = 0;
+
+	if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link))
+		hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG;
+	else
+		hotplug_mask = SERR_PHYRDY_CHG;
+
+	if (serror & hotplug_mask)
 		ata_ehi_hotplugged(&ehc->i);
 
 	ehc->i.err_mask |= err_mask;
@@ -2227,6 +2241,10 @@ static int ata_eh_skip_recovery(struct ata_link *link)
 	struct ata_eh_context *ehc = &link->eh_context;
 	struct ata_device *dev;
 
+	/* skip disabled links */
+	if (link->flags & ATA_LFLAG_DISABLED)
+		return 1;
+
 	/* thaw frozen port, resume link and recover failed devices */
 	if ((link->ap->pflags & ATA_PFLAG_FROZEN) ||
 	    (ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_link_nr_enabled(link))
@@ -2327,6 +2345,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 	struct ata_device *dev;
 	int nr_failed_devs, nr_disabled_devs;
 	int reset, rc;
+	unsigned long flags;
 
 	DPRINTK("ENTER\n");
 
@@ -2334,6 +2353,15 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 	ata_port_for_each_link(link, ap) {
 		struct ata_eh_context *ehc = &link->eh_context;
 
+		/* re-enable link? */
+		if (ehc->i.action & ATA_EH_ENABLE_LINK) {
+			ata_eh_about_to_do(link, NULL, ATA_EH_ENABLE_LINK);
+			spin_lock_irqsave(ap->lock, flags);
+			link->flags &= ~ATA_LFLAG_DISABLED;
+			spin_unlock_irqrestore(ap->lock, flags);
+			ata_eh_done(link, NULL, ATA_EH_ENABLE_LINK);
+		}
+
 		ata_link_for_each_dev(dev, link) {
 			if (link->flags & ATA_LFLAG_NO_RETRY)
 				ehc->tries[dev->devno] = 1;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index adeee7397cd..2bd1d26c9c8 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -170,6 +170,7 @@ enum {
 	ATA_LFLAG_ASSUME_SEMB	= (1 << 4), /* assume SEMB class */
 	ATA_LFLAG_ASSUME_CLASS	= ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
 	ATA_LFLAG_NO_RETRY	= (1 << 5), /* don't retry this link */
+	ATA_LFLAG_DISABLED	= (1 << 6), /* link is disabled */
 
 	/* struct ata_port flags */
 	ATA_FLAG_SLAVE_POSS	= (1 << 0), /* host supports slave dev */
@@ -289,6 +290,7 @@ enum {
 	ATA_EH_REVALIDATE	= (1 << 0),
 	ATA_EH_SOFTRESET	= (1 << 1),
 	ATA_EH_HARDRESET	= (1 << 2),
+	ATA_EH_ENABLE_LINK	= (1 << 3),
 
 	ATA_EH_RESET_MASK	= ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
 	ATA_EH_PERDEV_MASK	= ATA_EH_REVALIDATE,
@@ -999,6 +1001,7 @@ static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
 {
 	ata_ehi_schedule_probe(ehi);
 	ehi->flags |= ATA_EHI_HOTPLUGGED;
+	ehi->action |= ATA_EH_ENABLE_LINK;
 	ehi->err_mask |= AC_ERR_ATA_BUS;
 }
 
-- 
cgit v1.2.3-70-g09d2


From 668108d73bbb1ae85f01db38d6be822fd28ece1f Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:13 +0900
Subject: libata-pmp-prep: implement EH fast-fail path

If PMP itself becomes inaccessible while trying to link a downstream
link, spending time to recover the downstream link doesn't make any
sense.  Make EH skip retry and fail fast if -ERESTART is received.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index fbbf7916390..3c31e10caf2 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2050,7 +2050,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	if (rc == -EAGAIN)
 		rc = 0;
 
-	if (rc && try < ARRAY_SIZE(ata_eh_reset_timeouts)) {
+	if (rc && rc != -ERESTART && try < ARRAY_SIZE(ata_eh_reset_timeouts)) {
 		unsigned long now = jiffies;
 
 		if (time_before(now, deadline)) {
-- 
cgit v1.2.3-70-g09d2


From e31e8531d668c9c4dc7883054788f89805188003 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:13 +0900
Subject: libata-pmp-prep: implement ATA_HORKAGE_SKIP_PM

Some pseudo devices fail PM commands unnecessarily aborting system
suspend.  Implement ATA_HORKAGE_SKIP_PM which makes libata skip PM
commands for these devices.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-scsi.c | 7 +++++++
 include/linux/libata.h    | 1 +
 2 files changed, 8 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 8ca2caeed01..451f79c6fba 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -944,6 +944,13 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
 		goto invalid_fld;       /* LOEJ bit set not supported */
 	if (((cdb[4] >> 4) & 0xf) != 0)
 		goto invalid_fld;       /* power conditions not supported */
+
+	if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) {
+		/* the device lacks PM support, finish without doing anything */
+		scmd->result = SAM_STAT_GOOD;
+		return 1;
+	}
+
 	if (cdb[4] & 0x1) {
 		tf->nsect = 1;	/* 1 sector, lba=0 */
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 2bd1d26c9c8..56b21877111 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -329,6 +329,7 @@ enum {
 	ATA_HORKAGE_NONCQ	= (1 << 2),	/* Don't use NCQ */
 	ATA_HORKAGE_MAX_SEC_128	= (1 << 3),	/* Limit max sects to 128 */
 	ATA_HORKAGE_BROKEN_HPA	= (1 << 4),	/* Broken HPA */
+	ATA_HORKAGE_SKIP_PM	= (1 << 5),	/* Skip PM operations */
 };
 
 enum hsm_task_states {
-- 
cgit v1.2.3-70-g09d2


From 7d77b247088fb360aa74bfdd9e19bce1e1987668 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:14:13 +0900
Subject: libata-pmp-prep: implement sata_async_notification()

AN serves multiple purposes.  For ATAPI, it's used for media change
notification.  For PMP, for downstream PHY status change notification.
Implement sata_async_notification() which demultiplexes AN.

To avoid unnecessary port events, ATAPI AN is not enabled if PMP is
attached but SNTF is not available.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Kriten Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c        | 24 +++++-----------
 drivers/ata/libata-core.c | 13 ++++++---
 drivers/ata/libata-eh.c   | 73 +++++++++++++++++++++++++++++++++++++++++++++++
 drivers/ata/libata-scsi.c |  1 -
 drivers/ata/libata.h      |  1 +
 drivers/ata/sata_sil24.c  |  5 +---
 include/linux/libata.h    |  4 +--
 7 files changed, 93 insertions(+), 28 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index cf3404467ce..9f3c591c721 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1356,27 +1356,17 @@ static void ahci_port_intr(struct ata_port *ap)
 	}
 
 	if (status & PORT_IRQ_SDB_FIS) {
-		/*
-		 * if this is an ATAPI device with AN turned on,
-		 * then we should interrogate the device to
-		 * determine the cause of the interrupt
-		 *
-		 * for AN - this we should check the SDB FIS
-		 * and find the I and N bits set
+		/* If the 'N' bit in word 0 of the FIS is set, we just
+		 * received asynchronous notification.  Tell libata
+		 * about it.  Note that as the SDB FIS itself is
+		 * accessible, SNotification can be emulated by the
+		 * driver but don't bother for the time being.
 		 */
 		const __le32 *f = pp->rx_fis + RX_FIS_SDB;
 		u32 f0 = le32_to_cpu(f[0]);
 
-		/* check the 'N' bit in word 0 of the FIS */
-		if (f0 & (1 << 15)) {
-			int port_addr = ((f0 & 0x00000f00) >> 8);
-			struct ata_device *adev;
-			if (port_addr < ATA_MAX_DEVICES) {
-				adev = &ap->link.device[port_addr];
-				if (adev->flags & ATA_DFLAG_AN)
-					ata_scsi_media_change_notify(adev);
-			}
-		}
+		if (f0 & (1 << 15))
+			sata_async_notification(ap);
 	}
 
 	if (ap->link.sactive)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 376dbd80cc9..8b08e7bdd24 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2016,6 +2016,7 @@ int ata_dev_configure(struct ata_device *dev)
 	else if (dev->class == ATA_DEV_ATAPI) {
 		const char *cdb_intr_string = "";
 		const char *atapi_an_string = "";
+		u32 sntf;
 
 		rc = atapi_cdb_len(id);
 		if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
@@ -2027,11 +2028,14 @@ int ata_dev_configure(struct ata_device *dev)
 		}
 		dev->cdb_len = (unsigned int) rc;
 
-		/*
-		 * check to see if this ATAPI device supports
-		 * Asynchronous Notification
+		/* Enable ATAPI AN if both the host and device have
+		 * the support.  If PMP is attached, SNTF is required
+		 * to enable ATAPI AN to discern between PHY status
+		 * changed notifications and ATAPI ANs.
 		 */
-		if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id)) {
+		if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
+		    (!ap->nr_pmp_links ||
+		     sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
 			unsigned int err_mask;
 
 			/* issue SET feature command to turn this on */
@@ -7248,6 +7252,7 @@ EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
 EXPORT_SYMBOL_GPL(ata_link_abort);
 EXPORT_SYMBOL_GPL(ata_port_abort);
 EXPORT_SYMBOL_GPL(ata_port_freeze);
+EXPORT_SYMBOL_GPL(sata_async_notification);
 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 3c31e10caf2..60186f8ac3a 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -904,6 +904,79 @@ int ata_port_freeze(struct ata_port *ap)
 	return nr_aborted;
 }
 
+/**
+ *	sata_async_notification - SATA async notification handler
+ *	@ap: ATA port where async notification is received
+ *
+ *	Handler to be called when async notification via SDB FIS is
+ *	received.  This function schedules EH if necessary.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ *
+ *	RETURNS:
+ *	1 if EH is scheduled, 0 otherwise.
+ */
+int sata_async_notification(struct ata_port *ap)
+{
+	u32 sntf;
+	int rc;
+
+	if (!(ap->flags & ATA_FLAG_AN))
+		return 0;
+
+	rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
+	if (rc == 0)
+		sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
+
+	if (!ap->nr_pmp_links || rc) {
+		/* PMP is not attached or SNTF is not available */
+		if (!ap->nr_pmp_links) {
+			/* PMP is not attached.  Check whether ATAPI
+			 * AN is configured.  If so, notify media
+			 * change.
+			 */
+			struct ata_device *dev = ap->link.device;
+
+			if ((dev->class == ATA_DEV_ATAPI) &&
+			    (dev->flags & ATA_DFLAG_AN))
+				ata_scsi_media_change_notify(dev);
+			return 0;
+		} else {
+			/* PMP is attached but SNTF is not available.
+			 * ATAPI async media change notification is
+			 * not used.  The PMP must be reporting PHY
+			 * status change, schedule EH.
+			 */
+			ata_port_schedule_eh(ap);
+			return 1;
+		}
+	} else {
+		/* PMP is attached and SNTF is available */
+		struct ata_link *link;
+
+		/* check and notify ATAPI AN */
+		ata_port_for_each_link(link, ap) {
+			if (!(sntf & (1 << link->pmp)))
+				continue;
+
+			if ((link->device->class == ATA_DEV_ATAPI) &&
+			    (link->device->flags & ATA_DFLAG_AN))
+				ata_scsi_media_change_notify(link->device);
+		}
+
+		/* If PMP is reporting that PHY status of some
+		 * downstream ports has changed, schedule EH.
+		 */
+		if (sntf & (1 << SATA_PMP_CTRL_PORT)) {
+			ata_port_schedule_eh(ap);
+			return 1;
+		}
+
+		return 0;
+	}
+}
+
 /**
  *	ata_eh_freeze_port - EH helper to freeze port
  *	@ap: ATA port to freeze
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 451f79c6fba..df2e05738f3 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3244,7 +3244,6 @@ void ata_scsi_media_change_notify(struct ata_device *dev)
 		scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
 #endif
 }
-EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
 
 /**
  *	ata_scsi_hotplug - SCSI part of hotplug
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 0f3e355fdfd..ebe22982e80 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -119,6 +119,7 @@ extern int ata_scsi_add_hosts(struct ata_host *host,
 			      struct scsi_host_template *sht);
 extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
 extern int ata_scsi_offline_dev(struct ata_device *dev);
+extern void ata_scsi_media_change_notify(struct ata_device *dev);
 extern void ata_scsi_hotplug(struct work_struct *work);
 extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
 			       unsigned int buflen);
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 9acfce43bde..b4f81eb8bbb 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -821,11 +821,8 @@ static void sil24_error_intr(struct ata_port *ap)
 	ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
 
 	if (irq_stat & PORT_IRQ_SDB_NOTIFY) {
-		struct ata_device *dev = ap->link.device;
-
 		ata_ehi_push_desc(ehi, "SDB notify");
-		if (dev->flags & ATA_DFLAG_AN)
-			ata_scsi_media_change_notify(dev);
+		sata_async_notification(ap);
 	}
 
 	if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 56b21877111..cd9c2a28136 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -139,7 +139,7 @@ enum {
 	ATA_DFLAG_FLUSH_EXT	= (1 << 4), /* do FLUSH_EXT instead of FLUSH */
 	ATA_DFLAG_ACPI_PENDING	= (1 << 5), /* ACPI resume action pending */
 	ATA_DFLAG_ACPI_FAILED	= (1 << 6), /* ACPI on devcfg has failed */
-	ATA_DFLAG_AN		= (1 << 7), /* device supports AN */
+	ATA_DFLAG_AN		= (1 << 7), /* AN configured */
 	ATA_DFLAG_CFG_MASK	= (1 << 12) - 1,
 
 	ATA_DFLAG_PIO		= (1 << 12), /* device limited to PIO mode */
@@ -787,7 +787,6 @@ extern void ata_host_init(struct ata_host *, struct device *,
 extern int ata_scsi_detect(struct scsi_host_template *sht);
 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
-extern void ata_scsi_media_change_notify(struct ata_device *atadev);
 extern void ata_sas_port_destroy(struct ata_port *);
 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
 					   struct ata_port_info *, struct Scsi_Host *);
@@ -953,6 +952,7 @@ extern void ata_port_schedule_eh(struct ata_port *ap);
 extern int ata_link_abort(struct ata_link *link);
 extern int ata_port_abort(struct ata_port *ap);
 extern int ata_port_freeze(struct ata_port *ap);
+extern int sata_async_notification(struct ata_port *ap);
 
 extern void ata_eh_freeze_port(struct ata_port *ap);
 extern void ata_eh_thaw_port(struct ata_port *ap);
-- 
cgit v1.2.3-70-g09d2


From 1e582ba4ef6264dd8cb73250ebff767d0624d684 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 21 Sep 2007 20:07:14 +0900
Subject: libata: fix ata_set_max_sectors()

In ata_set_max_sectors(), the highest nibble in LBA28 mode was
missing.  This made drives sized between 8G and 128G with HPA turned
on to be resized to under 8G.  Fix it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 8b08e7bdd24..fd4563daacd 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -950,9 +950,12 @@ static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
 		tf.hob_lbal = (new_sectors >> 24) & 0xff;
 		tf.hob_lbam = (new_sectors >> 32) & 0xff;
 		tf.hob_lbah = (new_sectors >> 40) & 0xff;
-	} else
+	} else {
 		tf.command = ATA_CMD_SET_MAX;
 
+		tf.device |= (new_sectors >> 24) & 0xf;
+	}
+
 	tf.protocol |= ATA_PROT_NODATA;
 	tf.device |= ATA_LBA;
 
-- 
cgit v1.2.3-70-g09d2


From b6d6c74628767e1bd33c735b3b2ee7b132b4198e Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 21 Sep 2007 17:55:44 +0900
Subject: sata_via: kill SATA_PATA_SHARING register handling

The SATA_PATA_SHARING register doesn't have anything to do with the
SATA part of the controller.  It indicates whether an extern SATA PHY
is attached to the PATA part of the controller and if so how it is
wired.  As the PATA part is driven by pata_via, sata_via has no reason
to care about that.  Also, pata_via should work fine under all
configurations.

This patch removes unnecessary attach failures.  It seems recent via
chipsets are defaulting to different values or are actually connected
to SATA PHY triggering this more often.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_via.c | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index f0757023ce9..1dc9b4f2b2d 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -57,7 +57,6 @@ enum {
 	SATA_CHAN_ENAB		= 0x40, /* SATA channel enable */
 	SATA_INT_GATE		= 0x41, /* SATA interrupt gating */
 	SATA_NATIVE_MODE	= 0x42, /* Native mode enable */
-	SATA_PATA_SHARING	= 0x49, /* PATA/SATA sharing func ctrl */
 	PATA_UDMA_TIMING	= 0xB3, /* PATA timing for DMA/ cable detect */
 	PATA_PIO_TIMING		= 0xAB, /* PATA timing register */
 
@@ -68,7 +67,6 @@ enum {
 	NATIVE_MODE_ALL		= (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
 
 	SATA_EXT_PHY		= (1 << 6), /* 0==use PATA, 1==ext phy */
-	SATA_2DEV		= (1 << 5), /* SATA is master/slave */
 };
 
 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
@@ -508,7 +506,6 @@ static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	struct ata_host *host;
 	int board_id = (int) ent->driver_data;
 	const int *bar_sizes;
-	u8 tmp8;
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
@@ -517,19 +514,10 @@ static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (rc)
 		return rc;
 
-	if (board_id == vt6420) {
-		pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
-		if (tmp8 & SATA_2DEV) {
-			dev_printk(KERN_ERR, &pdev->dev,
-				   "SATA master/slave not supported (0x%x)\n",
-		       		   (int) tmp8);
-			return -EIO;
-		}
-
+	if (board_id == vt6420)
 		bar_sizes = &svia_bar_sizes[0];
-	} else {
+	else
 		bar_sizes = &vt6421_bar_sizes[0];
-	}
 
 	for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
 		if ((pci_resource_start(pdev, i) == 0) ||
-- 
cgit v1.2.3-70-g09d2


From b90fe23bd51c6b1c298159591c833bdd24f55002 Mon Sep 17 00:00:00 2001
From: Satyam Sharma <satyam@infradead.org>
Date: Sat, 22 Sep 2007 08:20:09 +0530
Subject: libata: Fix build failure on ppc64 drivers/ata/pata_scc.c

Little fixlets, that the build started erroring / warning about:

drivers/ata/pata_scc.c: In function 'scc_bmdma_status':
drivers/ata/pata_scc.c:734: error: structure has no member named 'active_tag'
drivers/ata/pata_scc.c: In function 'scc_pata_prereset':
drivers/ata/pata_scc.c:866: warning: passing arg 1 of 'ata_std_prereset' from incompatible pointer type
drivers/ata/pata_scc.c: In function 'scc_error_handler':
drivers/ata/pata_scc.c:908: warning: passing arg 2 of 'ata_bmdma_drive_eh' from incompatible pointer type
drivers/ata/pata_scc.c:908: warning: passing arg 3 of 'ata_bmdma_drive_eh' from incompatible pointer type
drivers/ata/pata_scc.c:908: warning: passing arg 5 of 'ata_bmdma_drive_eh' from incompatible pointer type
make[2]: *** [drivers/ata/pata_scc.o] Error 1

Signed-off-by: Satyam Sharma <satyam@infradead.org>
Cc: Alan Cox <alan@redhat.com>
Cc: Mel Gorman <mel@skynet.ie>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_scc.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index 941b72bec83..55576138fae 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -603,16 +603,17 @@ static unsigned int scc_bus_softreset(struct ata_port *ap, unsigned int devmask,
  *	Note: Original code is ata_std_softreset().
  */
 
-static int scc_std_softreset (struct ata_port *ap, unsigned int *classes,
-                              unsigned long deadline)
+static int scc_std_softreset(struct ata_link *link, unsigned int *classes,
+                             unsigned long deadline)
 {
+	struct ata_port *ap = link->ap;
 	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
 	unsigned int devmask = 0, err_mask;
 	u8 err;
 
 	DPRINTK("ENTER\n");
 
-	if (ata_link_offline(&ap->link)) {
+	if (ata_link_offline(link)) {
 		classes[0] = ATA_DEV_NONE;
 		goto out;
 	}
@@ -703,7 +704,7 @@ static void scc_bmdma_stop (struct ata_queued_cmd *qc)
 			printk(KERN_WARNING "%s: Internal Bus Error\n", DRV_NAME);
 			out_be32(bmid_base + SCC_DMA_INTST, INTSTS_BMSINT);
 			/* TBD: SW reset */
-			scc_std_softreset(ap, &classes, deadline);
+			scc_std_softreset(&ap->link, &classes, deadline);
 			continue;
 		}
 
@@ -742,7 +743,7 @@ static u8 scc_bmdma_status (struct ata_port *ap)
 	void __iomem *mmio = ap->ioaddr.bmdma_addr;
 	u8 host_stat = in_be32(mmio + SCC_DMA_STATUS);
 	u32 int_status = in_be32(mmio + SCC_DMA_INTST);
-	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
+	struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
 	static int retry = 0;
 
 	/* return if IOS_SS is cleared */
@@ -871,10 +872,10 @@ static void scc_bmdma_freeze (struct ata_port *ap)
  *	@deadline: deadline jiffies for the operation
  */
 
-static int scc_pata_prereset(struct ata_port *ap, unsigned long deadline)
+static int scc_pata_prereset(struct ata_link *link, unsigned long deadline)
 {
-	ap->cbl = ATA_CBL_PATA80;
-	return ata_std_prereset(ap, deadline);
+	link->ap->cbl = ATA_CBL_PATA80;
+	return ata_std_prereset(link, deadline);
 }
 
 /**
@@ -885,8 +886,10 @@ static int scc_pata_prereset(struct ata_port *ap, unsigned long deadline)
  *	Note: Original code is ata_std_postreset().
  */
 
-static void scc_std_postreset (struct ata_port *ap, unsigned int *classes)
+static void scc_std_postreset(struct ata_link *link, unsigned int *classes)
 {
+	struct ata_port *ap = link->ap;
+
 	DPRINTK("ENTER\n");
 
 	/* is double-select really necessary? */
-- 
cgit v1.2.3-70-g09d2


From 3cc3eb1148e4b2dfabf7a1dcf36fd8be1331ca95 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Wed, 26 Sep 2007 00:02:41 -0400
Subject: [libata] AHCI: enable AHCI mode, before using AHCI reset

AHCI spec says host-reset bit may only be set when the ahci-enable bit
is also set.

Noticed by Peer Chen <peerchen@gmail.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 9f3c591c721..b615390b6b8 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -827,8 +827,14 @@ static int ahci_reset_controller(struct ata_host *host)
 	void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
 	u32 tmp;
 
-	/* global controller reset */
+	/* we must be in AHCI mode, before using anything
+	 * AHCI-specific, such as HOST_RESET.
+	 */
 	tmp = readl(mmio + HOST_CTL);
+	if (!(tmp & HOST_AHCI_EN))
+		writel(tmp | HOST_AHCI_EN, mmio + HOST_CTL);
+
+	/* global controller reset */
 	if ((tmp & HOST_RESET) == 0) {
 		writel(tmp | HOST_RESET, mmio + HOST_CTL);
 		readl(mmio + HOST_CTL); /* flush */
-- 
cgit v1.2.3-70-g09d2


From 21d2c925d3da6aabf9a0b34e95787202379f682a Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 26 Sep 2007 23:02:52 +0100
Subject: pata_atiixp: Audit notes on locking

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_atiixp.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index 95ed3071a0a..9623f529553 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -173,6 +173,9 @@ static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  *
  *	When DMA begins we need to ensure that the UDMA control
  *	register for the channel is correctly set.
+ *
+ *	Note: The host lock held by the libata layer protects
+ *	us from two channels both trying to set DMA bits at once
  */
 
 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
@@ -199,6 +202,9 @@ static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
  *
  *	DMA has completed. Clear the UDMA flag as the next operations will
  *	be PIO ones not UDMA data transfer.
+ *
+ *	Note: The host lock held by the libata layer protects
+ *	us from two channels both trying to set DMA bits at once
  */
 
 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
-- 
cgit v1.2.3-70-g09d2


From 06b74dd28fa607249c5e41e5f1f6dd1885fe0a0d Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 26 Sep 2007 15:23:17 +0100
Subject: pata_pdc202xx_old MWDMA fixes, and notes

I've been doing an audit of this driver to try and find out why we have
problems with some Clevo boxes that use it. Didn't get anywhere other
than to discover all the bug reporters I have use vmware, which may or
may not be chance.

In the process however I did find out our MWDMA2 performance was a bit
low and code review showed the MWDMA0/2 timings are reversed due to a
thinko in the table ordering

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_pdc202xx_old.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index fd4350029bc..65d951618c6 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -9,7 +9,7 @@
  * First cut with LBA48/ATAPI
  *
  * TODO:
- *	Channel interlock/reset on both required
+ *	Channel interlock/reset on both required ?
  */
 
 #include <linux/kernel.h>
@@ -22,7 +22,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_pdc202xx_old"
-#define DRV_VERSION "0.4.2"
+#define DRV_VERSION "0.4.3"
 
 static int pdc2026x_cable_detect(struct ata_port *ap)
 {
@@ -106,9 +106,9 @@ static void pdc202xx_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 		{ 0x20, 0x01 }
 	};
 	static u8 mdma_timing[3][2] = {
-		{ 0x60, 0x03 },
-		{ 0x60, 0x04 },
 		{ 0xe0, 0x0f },
+		{ 0x60, 0x04 },
+		{ 0x60, 0x03 },
 	};
 	u8 r_bp, r_cp;
 
@@ -139,6 +139,9 @@ static void pdc202xx_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  *
  *	In UDMA3 or higher we have to clock switch for the duration of the
  *	DMA transfer sequence.
+ *
+ *	Note: The host lock held by the libata layer protects
+ *	us from two channels both trying to set DMA bits at once
  */
 
 static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
@@ -187,6 +190,9 @@ static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
  *
  *	After a DMA completes we need to put the clock back to 33MHz for
  *	PIO timings.
+ *
+ *	Note: The host lock held by the libata layer protects
+ *	us from two channels both trying to set DMA bits at once
  */
 
 static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
@@ -206,7 +212,6 @@ static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
 		iowrite32(0, atapi_reg);
 		iowrite8(ioread8(clock) & ~sel66, clock);
 	}
-	/* Check we keep host level locking here */
 	/* Flip back to 33Mhz for PIO */
 	if (adev->dma_mode >= XFER_UDMA_2)
 		iowrite8(ioread8(clock) & ~sel66, clock);
-- 
cgit v1.2.3-70-g09d2


From 7f567620ed32bea40a2acc25900c79db4dff96aa Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 28 Sep 2007 06:29:23 -0700
Subject: libata: update spurious NCQ completion blacklist

* The firmware version of ST3160812AS is "3.ADJ" no "3.AD".
* Add several entries from various sources.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index fd4563daacd..7f424c4b1bb 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3891,9 +3891,12 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "HTS541612J9SA00",	"SBDIC7JP",	ATA_HORKAGE_NONCQ, },
 	{ "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, },
 	{ "WDC WD740ADFD-00NLR1", NULL,		ATA_HORKAGE_NONCQ, },
+	{ "WDC WD3200AAJS-00RYA0", "12.01B01",	ATA_HORKAGE_NONCQ, },
 	{ "FUJITSU MHV2080BH",	"00840028",	ATA_HORKAGE_NONCQ, },
+	{ "ST9120822AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
 	{ "ST9160821AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
-	{ "ST3160812AS",	"3.AD",		ATA_HORKAGE_NONCQ, },
+	{ "ST3160812AS",	"3.ADJ",	ATA_HORKAGE_NONCQ, },
+	{ "ST980813AS",		"3.ADB",	ATA_HORKAGE_NONCQ, },
 	{ "SAMSUNG HD401LJ",	"ZZ100-15",	ATA_HORKAGE_NONCQ, },
 
 	/* devices which puke on READ_NATIVE_MAX */
-- 
cgit v1.2.3-70-g09d2


From 0b0a43e04ea671adc3cac085ee567d63c9ab3507 Mon Sep 17 00:00:00 2001
From: David Milburn <dmilburn@redhat.com>
Date: Fri, 28 Sep 2007 14:29:06 -0500
Subject: libata-core: blacklist HITACHI HDS drives using wildcard blacklist
 matching

Blacklist HITACHI HDS7250SASUN500G and HITACHI HDS7225SBSUN250G
drives using wildcard matching.

Signed-off-by David Milburn <dmilburn@redhat.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 7f424c4b1bb..d2880b013c8 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3878,8 +3878,8 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	/* NCQ is broken */
 	{ "Maxtor *",		"BANC*",	ATA_HORKAGE_NONCQ },
 	{ "Maxtor 7V300F0",	"VA111630",	ATA_HORKAGE_NONCQ },
-	{ "HITACHI HDS7250SASUN500G 0621KTAWSD", "K2AOAJ0AHITACHI",
-	  ATA_HORKAGE_NONCQ },
+	{ "HITACHI HDS7250SASUN500G*", NULL,    ATA_HORKAGE_NONCQ },
+	{ "HITACHI HDS7225SBSUN250G*", NULL,    ATA_HORKAGE_NONCQ },
 
 	/* Blacklist entries taken from Silicon Image 3124/3132
 	   Windows driver .inf file - also several Linux problem reports */
-- 
cgit v1.2.3-70-g09d2


From c4b5b7b6c4423ec4ced4177c87d2da04de324028 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@redhat.com>
Date: Sat, 29 Sep 2007 02:35:10 -0400
Subject: pata_ns87415: Initial cut at 87415/87560 IDE support

Signed-off-by: Alan Cox <alan@redhat.com>
[plus SuperIO fixes by Kyle McMartin]
[plus a cleanup from me]
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/Kconfig        |   9 +
 drivers/ata/Makefile       |   1 +
 drivers/ata/pata_ns87415.c | 467 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 477 insertions(+)
 create mode 100644 drivers/ata/pata_ns87415.c

(limited to 'drivers/ata')

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 3a737bdce2e..cf960bd1c00 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -441,6 +441,15 @@ config PATA_NS87410
 
 	  If unsure, say N.
 
+config PATA_NS87415
+	tristate "Nat Semi NS87415 PATA support (Experimental)"
+	depends on PCI && EXPERIMENTAL
+	help
+	  This option enables support for the National Semiconductor
+	  NS87415 PCI-IDE controller.
+
+	  If unsure, say N.
+
 config PATA_OPTI
 	tristate "OPTI621/6215 PATA support (Very Experimental)"
 	depends on PCI && EXPERIMENTAL
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 4eb7fb44be3..56bf13cbd19 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_PATA_IT8213)	+= pata_it8213.o
 obj-$(CONFIG_PATA_JMICRON)	+= pata_jmicron.o
 obj-$(CONFIG_PATA_NETCELL)	+= pata_netcell.o
 obj-$(CONFIG_PATA_NS87410)	+= pata_ns87410.o
+obj-$(CONFIG_PATA_NS87415)	+= pata_ns87415.o
 obj-$(CONFIG_PATA_OPTI)		+= pata_opti.o
 obj-$(CONFIG_PATA_OPTIDMA)	+= pata_optidma.o
 obj-$(CONFIG_PATA_MPC52xx)	+= pata_mpc52xx.o
diff --git a/drivers/ata/pata_ns87415.c b/drivers/ata/pata_ns87415.c
new file mode 100644
index 00000000000..bb97ef583f9
--- /dev/null
+++ b/drivers/ata/pata_ns87415.c
@@ -0,0 +1,467 @@
+/*
+ *    pata_ns87415.c - NS87415 (non PARISC) PATA
+ *
+ *	(C) 2005 Red Hat <alan@redhat.com>
+ *
+ *    This is a fairly generic MWDMA controller. It has some limitations
+ *    as it requires timing reloads on PIO/DMA transitions but it is otherwise
+ *    fairly well designed.
+ *
+ *    This driver assumes the firmware has left the chip in a valid ST506
+ *    compliant state, either legacy IRQ 14/15 or native INTA shared. You
+ *    may need to add platform code if your system fails to do this.
+ *
+ *    The same cell appears in the 87560 controller used by some PARISC
+ *    systems. This has its own special mountain of errata.
+ *
+ *    TODO:
+ *	Test PARISC SuperIO
+ *	Get someone to test on SPARC
+ *	Implement lazy pio/dma switching for better performance	
+ *	8bit shared timing.
+ *	See if we need to kill the FIFO for ATAPI
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/ata.h>
+
+#define DRV_NAME	"pata_ns87415"
+#define DRV_VERSION	"0.0.1"
+
+/**
+ *	ns87415_set_mode - Initialize host controller mode timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device whose timings we are configuring
+ *	@mode: Mode to set
+ *
+ *	Program the mode registers for this controller, channel and
+ *	device. Because the chip is quite an old design we have to do this
+ *	for PIO/DMA switches.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void ns87415_set_mode(struct ata_port *ap, struct ata_device *adev, u8 mode)
+{
+	struct pci_dev *dev	= to_pci_dev(ap->host->dev);
+	int unit		= 2 * ap->port_no + adev->devno;
+	int timing		= 0x44 + 2 * unit;
+	unsigned long T		= 1000000000 / 33333;	/* PCI clocks */
+	struct ata_timing t;
+	u16 clocking;
+	u8 iordy;
+	u8 status;
+	
+	/* Timing register format is 17 - low nybble read timing with
+	   the high nybble being 16 - x for recovery time in PCI clocks */
+   
+	ata_timing_compute(adev, adev->pio_mode, &t, T, 0);
+
+	clocking = 17 - FIT(t.active, 2, 17);
+	clocking |= (16 - FIT(t.recover, 1, 16)) << 4;
+ 	/* Use the same timing for read and write bytes */
+	clocking |= (clocking << 8);
+	pci_write_config_word(dev, timing, clocking);
+	
+	/* Set the IORDY enable versus DMA enable on or off properly */
+	pci_read_config_byte(dev, 0x42, &iordy);
+	iordy &= ~(1 << (4 + unit));
+	if (mode >= XFER_MW_DMA_0 || !ata_pio_need_iordy(adev))
+		iordy |= (1 << (4 + unit));
+
+	/* Paranoia: We shouldn't ever get here with busy write buffers
+	   but if so wait */
+
+	pci_read_config_byte(dev, 0x43, &status);
+	while (status & 0x03) {
+		udelay(1);
+		pci_read_config_byte(dev, 0x43, &status);
+	}
+	/* Flip the IORDY/DMA bits now we are sure the write buffers are
+	   clear */
+	pci_write_config_byte(dev, 0x42, iordy);
+
+	/* TODO: Set byte 54 command timing to the best 8bit
+	   mode shared by all four devices */
+}
+
+/**
+ *	ns87415_set_piomode - Initialize host controller PATA PIO timings
+ *	@ap: Port whose timings we are configuring
+ *	@adev: Device to program
+ *
+ *	Set PIO mode for device, in host controller PCI config space.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void ns87415_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	ns87415_set_mode(ap, adev, adev->pio_mode);
+}
+
+/**
+ *	ns87415_bmdma_setup		-	Set up DMA
+ *	@qc: Command block
+ *
+ *	Set up for bus masterng DMA. We have to do this ourselves
+ *	rather than use the helper due to a chip erratum
+ */
+
+static void ns87415_bmdma_setup(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
+	u8 dmactl;
+
+	/* load PRD table addr. */
+	mb();	/* make sure PRD table writes are visible to controller */
+	iowrite32(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
+
+	/* specify data direction, triple-check start bit is clear */
+	dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+	dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
+	/* Due to an erratum we need to write these bits to the wrong
+	   place - which does save us an I/O bizarrely */
+	dmactl |= ATA_DMA_INTR | ATA_DMA_ERR;
+	if (!rw)
+		dmactl |= ATA_DMA_WR;
+	iowrite8(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+	/* issue r/w command */
+	ap->ops->exec_command(ap, &qc->tf);
+}
+
+/**
+ *	ns87415_bmdma_start		-	Begin DMA transfer
+ *	@qc: Command block
+ *
+ *	Switch the timings for the chip and set up for a DMA transfer
+ *	before the DMA burst begins.
+ *
+ *	FIXME: We should do lazy switching on bmdma_start versus
+ *	ata_pio_data_xfer for better performance.
+ */
+
+static void ns87415_bmdma_start(struct ata_queued_cmd *qc)
+{
+	ns87415_set_mode(qc->ap, qc->dev, qc->dev->dma_mode);
+	ata_bmdma_start(qc);
+}
+
+/**
+ *	ns87415_bmdma_stop		-	End DMA transfer
+ *	@qc: Command block
+ *
+ *	End DMA mode and switch the controller back into PIO mode
+ */
+
+static void ns87415_bmdma_stop(struct ata_queued_cmd *qc)
+{
+	ata_bmdma_stop(qc);
+	ns87415_set_mode(qc->ap, qc->dev, qc->dev->pio_mode);
+}
+
+/**
+ *	ns87415_bmdma_irq_clear		-	Clear interrupt
+ *	@ap: Channel to clear
+ *
+ *	Erratum: Due to a chip bug regisers 02 and 0A bit 1 and 2 (the
+ *	error bits) are reset by writing to register 00 or 08.
+ */
+
+static void ns87415_bmdma_irq_clear(struct ata_port *ap)
+{
+	void __iomem *mmio = ap->ioaddr.bmdma_addr;
+
+	if (!mmio)
+		return;
+	iowrite8((ioread8(mmio + ATA_DMA_CMD) | ATA_DMA_INTR | ATA_DMA_ERR), 
+			mmio + ATA_DMA_CMD);
+}
+
+/**
+ *	ns87415_check_atapi_dma		-	ATAPI DMA filter
+ *	@qc: Command block
+ *
+ *	Disable ATAPI DMA (for now). We may be able to do DMA if we
+ *	kill the prefetching. This isn't clear.
+ */
+
+static int ns87415_check_atapi_dma(struct ata_queued_cmd *qc)
+{
+	return -EOPNOTSUPP;
+}
+
+#if defined(CONFIG_SUPERIO)
+
+/* SUPERIO 87560 is a PoS chip that NatSem denies exists.
+ * Unfortunately, it's built-in on all Astro-based PA-RISC workstations
+ * which use the integrated NS87514 cell for CD-ROM support.
+ * i.e we have to support for CD-ROM installs.
+ * See drivers/parisc/superio.c for more gory details.
+ *
+ * Workarounds taken from drivers/ide/pci/ns87415.c
+ */
+
+#include <asm/superio.h>
+
+/**
+ *	ns87560_read_buggy	-	workaround buggy Super I/O chip
+ *	@port: Port to read
+ *
+ *	Work around chipset problems in the 87560 SuperIO chip
+ */
+
+static u8 ns87560_read_buggy(void __iomem *port)
+{
+	u8 tmp;
+	int retries = SUPERIO_IDE_MAX_RETRIES;
+	do {
+		tmp = ioread8(port);
+		if (tmp != 0)
+			return tmp;
+		udelay(50);
+	} while(retries-- > 0);
+	return tmp;
+}
+
+/**
+ *	ns87560_check_status
+ *	@ap: channel to check
+ *
+ *	Return the status of the channel working around the
+ *	87560 flaws.
+ */
+
+static u8 ns87560_check_status(struct ata_port *ap)
+{
+	return ns87560_read_buggy(ap->ioaddr.status_addr);
+}
+
+/**
+ *	ns87560_tf_read - input device's ATA taskfile shadow registers
+ *	@ap: Port from which input is read
+ *	@tf: ATA taskfile register set for storing input
+ *
+ *	Reads ATA taskfile registers for currently-selected device
+ *	into @tf. Work around the 87560 bugs.
+ *
+ *	LOCKING:
+ *	Inherited from caller.
+ */
+void ns87560_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
+{
+	struct ata_ioports *ioaddr = &ap->ioaddr;
+
+	tf->command = ns87560_check_status(ap);
+	tf->feature = ioread8(ioaddr->error_addr);
+	tf->nsect = ioread8(ioaddr->nsect_addr);
+	tf->lbal = ioread8(ioaddr->lbal_addr);
+	tf->lbam = ioread8(ioaddr->lbam_addr);
+	tf->lbah = ioread8(ioaddr->lbah_addr);
+	tf->device = ns87560_read_buggy(ioaddr->device_addr);
+
+	if (tf->flags & ATA_TFLAG_LBA48) {
+		iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
+		tf->hob_feature = ioread8(ioaddr->error_addr);
+		tf->hob_nsect = ioread8(ioaddr->nsect_addr);
+		tf->hob_lbal = ioread8(ioaddr->lbal_addr);
+		tf->hob_lbam = ioread8(ioaddr->lbam_addr);
+		tf->hob_lbah = ioread8(ioaddr->lbah_addr);
+		iowrite8(tf->ctl, ioaddr->ctl_addr);
+		ap->last_ctl = tf->ctl;
+	}
+}
+
+/**
+ *	ns87560_bmdma_status
+ *	@ap: channel to check
+ *
+ *	Return the DMA status of the channel working around the
+ *	87560 flaws.
+ */
+
+static u8 ns87560_bmdma_status(struct ata_port *ap)
+{
+	return ns87560_read_buggy(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+}
+
+static const struct ata_port_operations ns87560_pata_ops = {
+	.set_piomode		= ns87415_set_piomode,
+	.mode_filter		= ata_pci_default_filter,
+
+	.tf_load		= ata_tf_load,
+	.tf_read		= ns87560_tf_read,
+	.check_status		= ns87560_check_status,
+	.check_atapi_dma	= ns87415_check_atapi_dma,
+	.exec_command		= ata_exec_command,
+	.dev_select		= ata_std_dev_select,
+
+	.freeze			= ata_bmdma_freeze,
+	.thaw			= ata_bmdma_thaw,
+	.error_handler		= ata_bmdma_error_handler,
+	.post_internal_cmd 	= ata_bmdma_post_internal_cmd,
+	.cable_detect		= ata_cable_40wire,
+
+	.bmdma_setup		= ns87415_bmdma_setup,
+	.bmdma_start		= ns87415_bmdma_start,
+	.bmdma_stop		= ns87415_bmdma_stop,
+	.bmdma_status		= ns87560_bmdma_status,
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+	.data_xfer		= ata_data_xfer,
+
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= ns87415_bmdma_irq_clear,
+	.irq_on			= ata_irq_on,
+
+	.port_start		= ata_sff_port_start,
+};
+
+#endif		/* 87560 SuperIO Support */
+
+
+static const struct ata_port_operations ns87415_pata_ops = {
+	.set_piomode		= ns87415_set_piomode,
+	.mode_filter		= ata_pci_default_filter,
+
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.check_status		= ata_check_status,
+	.check_atapi_dma	= ns87415_check_atapi_dma,
+	.exec_command		= ata_exec_command,
+	.dev_select		= ata_std_dev_select,
+
+	.freeze			= ata_bmdma_freeze,
+	.thaw			= ata_bmdma_thaw,
+	.error_handler		= ata_bmdma_error_handler,
+	.post_internal_cmd 	= ata_bmdma_post_internal_cmd,
+	.cable_detect		= ata_cable_40wire,
+
+	.bmdma_setup		= ns87415_bmdma_setup,
+	.bmdma_start		= ns87415_bmdma_start,
+	.bmdma_stop		= ns87415_bmdma_stop,
+	.bmdma_status		= ata_bmdma_status,
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= ata_qc_issue_prot,
+	.data_xfer		= ata_data_xfer,
+
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= ns87415_bmdma_irq_clear,
+	.irq_on			= ata_irq_on,
+
+	.port_start		= ata_sff_port_start,
+};
+
+static struct scsi_host_template ns87415_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= LIBATA_MAX_PRD,
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
+	.emulated		= ATA_SHT_EMULATED,
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,
+	.proc_name		= DRV_NAME,
+	.dma_boundary		= ATA_DMA_BOUNDARY,
+	.slave_configure	= ata_scsi_slave_config,
+	.slave_destroy		= ata_scsi_slave_destroy,
+	.bios_param		= ata_std_bios_param,
+};
+
+
+/**
+ *	ns87415_init_one - Register 87415 ATA PCI device with kernel services
+ *	@pdev: PCI device to register
+ *	@ent: Entry in ns87415_pci_tbl matching with @pdev
+ *
+ *	Called from kernel PCI layer.  We probe for combined mode (sigh),
+ *	and then hand over control to libata, for it to do the rest.
+ *
+ *	LOCKING:
+ *	Inherited from PCI layer (may sleep).
+ *
+ *	RETURNS:
+ *	Zero on success, or -ERRNO value.
+ */
+
+static int ns87415_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	static int printed_version;
+	static const struct ata_port_info info = {
+		.sht		= &ns87415_sht,
+		.flags		= ATA_FLAG_SLAVE_POSS,
+		.pio_mask	= 0x1f,	/* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.port_ops	= &ns87415_pata_ops,
+	};
+	const struct ata_port_info *ppi[] = { &info, NULL };
+#if defined(CONFIG_SUPERIO)
+	static const struct ata_port_info info87560 = {
+		.sht		= &ns87415_sht,
+		.flags		= ATA_FLAG_SLAVE_POSS,
+		.pio_mask	= 0x1f,	/* pio0-4 */
+		.mwdma_mask	= 0x07, /* mwdma0-2 */
+		.port_ops	= &ns87560_pata_ops,
+	};
+
+	if (PCI_SLOT(pdev->devfn) == 0x0E)
+		ppi[0] = &info87560;
+#endif
+	if (!printed_version++)
+		dev_printk(KERN_DEBUG, &pdev->dev,
+			   "version " DRV_VERSION "\n");
+	/* Select 512 byte sectors */
+	pci_write_config_byte(pdev, 0x55, 0xEE);
+	/* Select PIO0 8bit clocking */
+	pci_write_config_byte(pdev, 0x54, 0xB7);
+	return ata_pci_init_one(pdev, ppi);
+}
+
+static const struct pci_device_id ns87415_pci_tbl[] = {
+	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), },
+
+	{ }	/* terminate list */
+};
+
+static struct pci_driver ns87415_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= ns87415_pci_tbl,
+	.probe			= ns87415_init_one,
+	.remove			= ata_pci_remove_one,
+#ifdef CONFIG_PM
+	.suspend		= ata_pci_device_suspend,
+	.resume			= ata_pci_device_resume,
+#endif
+};
+
+static int __init ns87415_init(void)
+{
+	return pci_register_driver(&ns87415_pci_driver);
+}
+
+static void __exit ns87415_exit(void)
+{
+	pci_unregister_driver(&ns87415_pci_driver);
+}
+
+module_init(ns87415_init);
+module_exit(ns87415_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("ATA low-level driver for NS87415 controllers");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
-- 
cgit v1.2.3-70-g09d2


From 54174db300ee1bac632d62e4ac37fe02e47d1f18 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Sat, 29 Sep 2007 04:01:43 -0400
Subject: [libata] ata_piix: add HP compaq laptop to short cable list

Reported by Andreas Messer.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ata_piix.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 8dc15a6cea7..e783e678acf 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -598,6 +598,7 @@ static const struct ich_laptop ich_laptop[] = {
 	{ 0x27DF, 0x0005, 0x0280 },	/* ICH7 on Acer 5602WLMi */
 	{ 0x27DF, 0x1025, 0x0110 },	/* ICH7 on Acer 3682WLMi */
 	{ 0x27DF, 0x1043, 0x1267 },	/* ICH7 on Asus W5F */
+	{ 0x27DF, 0x103C, 0x30A1 },	/* ICH7 on HP Compaq nc2400 */
 	{ 0x24CA, 0x1025, 0x0061 },	/* ICH4 on ACER Aspire 2023WLMi */
 	/* end marker */
 	{ 0, }
-- 
cgit v1.2.3-70-g09d2


From 93328e1145c1989d1a214d34ac4e968dea7f7ed7 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@redhat.com>
Date: Sat, 29 Sep 2007 04:06:48 -0400
Subject: [PATCH] libata: Fix HPA handling regression

Restore the support for handling drives that report one sector too many
(ie SCSI not ATA style). This worked before the HPA update but was
removed in that process.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 7 ++++++-
 include/linux/libata.h    | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d2880b013c8..eb9709864a2 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -915,7 +915,8 @@ static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
 		*max_sectors = ata_tf_to_lba48(&tf);
 	else
 		*max_sectors = ata_tf_to_lba(&tf);
-
+        if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
+		(*max_sectors)--;
 	return 0;
 }
 
@@ -3905,6 +3906,10 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
 	{ "MAXTOR 6L080L4",	"A93.0500",	ATA_HORKAGE_BROKEN_HPA },
 
+	/* Devices which report 1 sector over size HPA */
+	{ "ST340823A",		NULL,		ATA_HORKAGE_HPA_SIZE, },
+	{ "ST320413A",		NULL,		ATA_HORKAGE_HPA_SIZE, },
+
 	/* End Marker */
 	{ }
 };
diff --git a/include/linux/libata.h b/include/linux/libata.h
index cd9c2a28136..f9ed198e4fc 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -330,6 +330,7 @@ enum {
 	ATA_HORKAGE_MAX_SEC_128	= (1 << 3),	/* Limit max sects to 128 */
 	ATA_HORKAGE_BROKEN_HPA	= (1 << 4),	/* Broken HPA */
 	ATA_HORKAGE_SKIP_PM	= (1 << 5),	/* Skip PM operations */
+	ATA_HORKAGE_HPA_SIZE	= (1 << 6),	/* native size off by one */
 };
 
 enum hsm_task_states {
-- 
cgit v1.2.3-70-g09d2


From 3495de733633d24ee97852080b737b436c110d6e Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:53 +0900
Subject: libata-pmp: update ata_eh_reset() for PMP

PMP always requires SRST to be enabled.  Also, hardreset reports
classification code from the first device when PMP is attached, not
from the PMP.  Update ata_eh_reset() such that followup softreset is
performed if the controller is PMP capable and the host link is being
reset.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 60186f8ac3a..687419b6670 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2003,6 +2003,8 @@ static int ata_eh_followup_srst_needed(struct ata_link *link,
 		return 1;
 	if (rc != 0)
 		return 0;
+	if ((link->ap->flags & ATA_FLAG_PMP) && ata_is_host_link(link))
+		return 1;
 	if (classify && !(link->flags & ATA_LFLAG_ASSUME_CLASS) &&
 	    classes[0] == ATA_DEV_UNKNOWN)
 		return 1;
-- 
cgit v1.2.3-70-g09d2


From 3af9a77af9e2b72366363864bfcd3d51465ff98a Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:54 +0900
Subject: libata-pmp: implement Port Multiplier support

Implement Port Multiplier support.  To support PMP, a LLDD has to
supply ops->pmp_read() and pmp_write().  If non-null, ->pmp_attach and
->pmp_detach are called on PMP attach and detach, respectively.

->pmp_read/write() can be called while the port is frozen, so they
must be implemented by polling.  This patch supplies several helpers
to ease ->pmp_read/write() implementation.

Also, irq_handler and error_handler must be PMP aware.  Most of PMP
aware EH can be done by calling ata_pmp_do_eh() with appropriate
methods.  PMP EH uses separate set of reset methods and this patch
implements standard prereset, hardreset and postreset methods.

This patch only implements PMP support.  The next patch will integrate
PMP into the reset of libata and thus enable PMP support.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/Makefile      |    3 +-
 drivers/ata/libata-core.c |   11 +
 drivers/ata/libata-pmp.c  | 1182 +++++++++++++++++++++++++++++++++++++++++++++
 drivers/ata/libata.h      |    5 +
 include/linux/libata.h    |   19 +
 5 files changed, 1219 insertions(+), 1 deletion(-)
 create mode 100644 drivers/ata/libata-pmp.c

(limited to 'drivers/ata')

diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 56bf13cbd19..7e937519a93 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -71,5 +71,6 @@ obj-$(CONFIG_ATA_GENERIC)	+= ata_generic.o
 # Should be last libata driver
 obj-$(CONFIG_PATA_LEGACY)	+= pata_legacy.o
 
-libata-objs	:= libata-core.o libata-scsi.o libata-sff.o libata-eh.o
+libata-objs	:= libata-core.o libata-scsi.o libata-sff.o libata-eh.o \
+		   libata-pmp.o
 libata-$(CONFIG_ATA_ACPI)	+= libata-acpi.o
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index eb9709864a2..9e7f55b7104 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3865,6 +3865,9 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "IOMEGA  ZIP 250       ATAPI", NULL,	ATA_HORKAGE_NODMA }, /* temporary fix */
 	{ "IOMEGA  ZIP 250       ATAPI       Floppy",
 				NULL,		ATA_HORKAGE_NODMA },
+	/* Odd clown on sil3726/4726 PMPs */
+	{ "Config  Disk",	NULL,		ATA_HORKAGE_NODMA |
+						ATA_HORKAGE_SKIP_PM },
 
 	/* Weird ATAPI devices */
 	{ "TORiSAN DVD-ROM DRD-N216", NULL,	ATA_HORKAGE_MAX_SEC_128 },
@@ -7251,6 +7254,14 @@ EXPORT_SYMBOL_GPL(ata_pci_default_filter);
 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
 #endif /* CONFIG_PCI */
 
+EXPORT_SYMBOL_GPL(sata_pmp_read_init_tf);
+EXPORT_SYMBOL_GPL(sata_pmp_read_val);
+EXPORT_SYMBOL_GPL(sata_pmp_write_init_tf);
+EXPORT_SYMBOL_GPL(sata_pmp_std_prereset);
+EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset);
+EXPORT_SYMBOL_GPL(sata_pmp_std_postreset);
+EXPORT_SYMBOL_GPL(sata_pmp_do_eh);
+
 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
new file mode 100644
index 00000000000..671d171055a
--- /dev/null
+++ b/drivers/ata/libata-pmp.c
@@ -0,0 +1,1182 @@
+/*
+ * libata-pmp.c - libata port multiplier support
+ *
+ * Copyright (c) 2007  SUSE Linux Products GmbH
+ * Copyright (c) 2007  Tejun Heo <teheo@suse.de>
+ *
+ * This file is released under the GPLv2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/libata.h>
+#include "libata.h"
+
+/**
+ *	sata_pmp_read - read PMP register
+ *	@link: link to read PMP register for
+ *	@reg: register to read
+ *	@r_val: resulting value
+ *
+ *	Wrapper around ap->ops->pmp_read to make it easier to call and
+ *	nomarlize error return value.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+static int sata_pmp_read(struct ata_link *link, int reg, u32 *r_val)
+{
+	struct ata_port *ap = link->ap;
+	struct ata_device *pmp_dev = ap->link.device;
+	int rc;
+
+	might_sleep();
+
+	rc = ap->ops->pmp_read(pmp_dev, link->pmp, reg, r_val);
+	if (rc)
+		rc = -EIO;
+	return rc;
+}
+
+/**
+ *	sata_pmp_write - write PMP register
+ *	@link: link to write PMP register for
+ *	@reg: register to write
+ *	@r_val: value to write
+ *
+ *	Wrapper around ap->ops->pmp_write to make it easier to call
+ *	and nomarlize error return value.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+static int sata_pmp_write(struct ata_link *link, int reg, u32 val)
+{
+	struct ata_port *ap = link->ap;
+	struct ata_device *pmp_dev = ap->link.device;
+	int rc;
+
+	might_sleep();
+
+	rc = ap->ops->pmp_write(pmp_dev, link->pmp, reg, val);
+	if (rc)
+		rc = -EIO;
+	return rc;
+}
+
+/**
+ *	sata_pmp_read_init_tf - initialize TF for PMP read
+ *	@tf: taskfile to initialize
+ *	@dev: PMP dev
+ *	@pmp: port multiplier port number
+ *	@reg: register to read
+ *
+ *	Initialize @tf for PMP read command.
+ *
+ *	LOCKING:
+ *	None.
+ */
+void sata_pmp_read_init_tf(struct ata_taskfile *tf,
+			   struct ata_device *dev, int pmp, int reg)
+{
+	ata_tf_init(dev, tf);
+	tf->command = ATA_CMD_PMP_READ;
+	tf->protocol = ATA_PROT_NODATA;
+	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+	tf->feature = reg;
+	tf->device = pmp;
+}
+
+/**
+ *	sata_pmp_read_val - extract PMP read result from TF
+ *	@tf: target TF
+ *
+ *	Determine PMP read result from @tf.
+ *
+ *	LOCKING:
+ *	None.
+ */
+u32 sata_pmp_read_val(const struct ata_taskfile *tf)
+{
+	return tf->nsect | tf->lbal << 8 | tf->lbam << 16 | tf->lbah << 24;
+}
+
+/**
+ *	sata_pmp_read_init_tf - initialize TF for PMP write
+ *	@tf: taskfile to initialize
+ *	@dev: PMP dev
+ *	@pmp: port multiplier port number
+ *	@reg: register to read
+ *	@val: value to write
+ *
+ *	Initialize @tf for PMP write command.
+ *
+ *	LOCKING:
+ *	None.
+ */
+void sata_pmp_write_init_tf(struct ata_taskfile *tf,
+			    struct ata_device *dev, int pmp, int reg, u32 val)
+{
+	ata_tf_init(dev, tf);
+	tf->command = ATA_CMD_PMP_WRITE;
+	tf->protocol = ATA_PROT_NODATA;
+	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+	tf->feature = reg;
+	tf->device = pmp;
+	tf->nsect = val & 0xff;
+	tf->lbal = (val >> 8) & 0xff;
+	tf->lbam = (val >> 16) & 0xff;
+	tf->lbah = (val >> 24) & 0xff;
+}
+
+/**
+ *	sata_pmp_scr_read - read PSCR
+ *	@link: ATA link to read PSCR for
+ *	@reg: PSCR to read
+ *	@r_val: resulting value
+ *
+ *	Read PSCR @reg into @r_val for @link, to be called from
+ *	ata_scr_read().
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *r_val)
+{
+	if (reg > SATA_PMP_PSCR_CONTROL)
+		return -EINVAL;
+
+	return sata_pmp_read(link, reg, r_val);
+}
+
+/**
+ *	sata_pmp_scr_write - write PSCR
+ *	@link: ATA link to write PSCR for
+ *	@reg: PSCR to write
+ *	@val: value to be written
+ *
+ *	Write @val to PSCR @reg for @link, to be called from
+ *	ata_scr_write() and ata_scr_write_flush().
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
+{
+	if (reg > SATA_PMP_PSCR_CONTROL)
+		return -EINVAL;
+
+	return sata_pmp_write(link, reg, val);
+}
+
+/**
+ *	sata_pmp_std_prereset - prepare PMP link for reset
+ *	@link: link to be reset
+ *	@deadline: deadline jiffies for the operation
+ *
+ *	@link is about to be reset.  Initialize it.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep)
+ *
+ *	RETURNS:
+ *	0 on success, -errno otherwise.
+ */
+int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline)
+{
+	struct ata_eh_context *ehc = &link->eh_context;
+	const unsigned long *timing = sata_ehc_deb_timing(ehc);
+	int rc;
+
+	/* force HRST? */
+	if (link->flags & ATA_LFLAG_NO_SRST)
+		ehc->i.action |= ATA_EH_HARDRESET;
+
+	/* handle link resume */
+	if ((ehc->i.flags & ATA_EHI_RESUME_LINK) &&
+	    (link->flags & ATA_LFLAG_HRST_TO_RESUME))
+		ehc->i.action |= ATA_EH_HARDRESET;
+
+	/* if we're about to do hardreset, nothing more to do */
+	if (ehc->i.action & ATA_EH_HARDRESET)
+		return 0;
+
+	/* resume link */
+	rc = sata_link_resume(link, timing, deadline);
+	if (rc) {
+		/* phy resume failed */
+		ata_link_printk(link, KERN_WARNING, "failed to resume link "
+				"for reset (errno=%d)\n", rc);
+		return rc;
+	}
+
+	/* clear SError bits including .X which blocks the port when set */
+	rc = sata_scr_write(link, SCR_ERROR, 0xffffffff);
+	if (rc) {
+		ata_link_printk(link, KERN_ERR,
+				"failed to clear SError (errno=%d)\n", rc);
+		return rc;
+	}
+
+	return 0;
+}
+
+/**
+ *	sata_pmp_std_hardreset - standard hardreset method for PMP link
+ *	@link: link to be reset
+ *	@class: resulting class of attached device
+ *	@deadline: deadline jiffies for the operation
+ *
+ *	Hardreset PMP port @link.  Note that this function doesn't
+ *	wait for BSY clearance.  There simply isn't a generic way to
+ *	wait the event.  Instead, this function return -EAGAIN thus
+ *	telling libata-EH to followup with softreset.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep)
+ *
+ *	RETURNS:
+ *	0 on success, -errno otherwise.
+ */
+int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
+			   unsigned long deadline)
+{
+	const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
+	u32 tmp;
+	int rc;
+
+	DPRINTK("ENTER\n");
+
+	/* do hardreset */
+	rc = sata_link_hardreset(link, timing, deadline);
+	if (rc) {
+		ata_link_printk(link, KERN_ERR,
+				"COMRESET failed (errno=%d)\n", rc);
+		goto out;
+	}
+
+	/* clear SError bits including .X which blocks the port when set */
+	rc = sata_scr_write(link, SCR_ERROR, 0xffffffff);
+	if (rc) {
+		ata_link_printk(link, KERN_ERR, "failed to clear SError "
+				"during hardreset (errno=%d)\n", rc);
+		goto out;
+	}
+
+	/* if device is present, follow up with srst to wait for !BSY */
+	if (ata_link_online(link))
+		rc = -EAGAIN;
+ out:
+	/* if SCR isn't accessible, we need to reset the PMP */
+	if (rc && rc != -EAGAIN && sata_scr_read(link, SCR_STATUS, &tmp))
+		rc = -ERESTART;
+
+	DPRINTK("EXIT, rc=%d\n", rc);
+	return rc;
+}
+
+/**
+ *	ata_std_postreset - standard postreset method for PMP link
+ *	@link: the target ata_link
+ *	@classes: classes of attached devices
+ *
+ *	This function is invoked after a successful reset.  Note that
+ *	the device might have been reset more than once using
+ *	different reset methods before postreset is invoked.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep)
+ */
+void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class)
+{
+	u32 serror;
+
+	DPRINTK("ENTER\n");
+
+	/* clear SError */
+	if (sata_scr_read(link, SCR_ERROR, &serror) == 0)
+		sata_scr_write(link, SCR_ERROR, serror);
+
+	/* print link status */
+	sata_print_link_status(link);
+
+	DPRINTK("EXIT\n");
+}
+
+/**
+ *	sata_pmp_read_gscr - read GSCR block of SATA PMP
+ *	@dev: PMP device
+ *	@gscr: buffer to read GSCR block into
+ *
+ *	Read selected PMP GSCRs from the PMP at @dev.  This will serve
+ *	as configuration and identification info for the PMP.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+static int sata_pmp_read_gscr(struct ata_device *dev, u32 *gscr)
+{
+	static const int gscr_to_read[] = { 0, 1, 2, 32, 33, 64, 96 };
+	int i, rc;
+
+	for (i = 0; i < ARRAY_SIZE(gscr_to_read); i++) {
+		int reg = gscr_to_read[i];
+
+		rc = sata_pmp_read(dev->link, reg, &gscr[reg]);
+		if (rc) {
+			ata_dev_printk(dev, KERN_ERR, "failed to read "
+				       "PMP GSCR[%d] (errno=%d)\n", reg, rc);
+			return rc;
+		}
+	}
+
+	return 0;
+}
+
+static const char *sata_pmp_spec_rev_str(const u32 *gscr)
+{
+	u32 rev = gscr[SATA_PMP_GSCR_REV];
+
+	if (rev & (1 << 2))
+		return "1.1";
+	if (rev & (1 << 1))
+		return "1.0";
+	return "<unknown>";
+}
+
+static int sata_pmp_configure(struct ata_device *dev, int print_info)
+{
+	struct ata_port *ap = dev->link->ap;
+	u32 *gscr = dev->gscr;
+	const char *reason;
+	int nr_ports, rc;
+
+	nr_ports = sata_pmp_gscr_ports(gscr);
+
+	if (nr_ports <= 0 || nr_ports > SATA_PMP_MAX_PORTS) {
+		rc = -EINVAL;
+		reason = "invalid nr_ports";
+		goto fail;
+	}
+
+	if ((ap->flags & ATA_FLAG_AN) &&
+	    (gscr[SATA_PMP_GSCR_FEAT] & SATA_PMP_FEAT_NOTIFY))
+		dev->flags |= ATA_DFLAG_AN;
+
+	/* monitor SERR_PHYRDY_CHG on fan-out ports */
+	rc = sata_pmp_write(dev->link, SATA_PMP_GSCR_ERROR_EN, SERR_PHYRDY_CHG);
+	if (rc) {
+		reason = "failed to write GSCR_ERROR_EN";
+		goto fail;
+	}
+
+	/* turn off notification till fan-out ports are reset and configured */
+	if (gscr[SATA_PMP_GSCR_FEAT_EN] & SATA_PMP_FEAT_NOTIFY) {
+		gscr[SATA_PMP_GSCR_FEAT_EN] &= ~SATA_PMP_FEAT_NOTIFY;
+
+		rc = sata_pmp_write(dev->link, SATA_PMP_GSCR_FEAT_EN,
+				    gscr[SATA_PMP_GSCR_FEAT_EN]);
+		if (rc) {
+			reason = "failed to write GSCR_FEAT_EN";
+			goto fail;
+		}
+	}
+
+	if (print_info) {
+		ata_dev_printk(dev, KERN_INFO, "Port Multiplier %s, "
+			       "0x%04x:0x%04x r%d, %d ports, feat 0x%x/0x%x\n",
+			       sata_pmp_spec_rev_str(gscr),
+			       sata_pmp_gscr_vendor(gscr),
+			       sata_pmp_gscr_devid(gscr),
+			       sata_pmp_gscr_rev(gscr),
+			       nr_ports, gscr[SATA_PMP_GSCR_FEAT_EN],
+			       gscr[SATA_PMP_GSCR_FEAT]);
+
+		if (!(dev->flags & ATA_DFLAG_AN))
+			ata_dev_printk(dev, KERN_INFO,
+				"Asynchronous notification not supported, "
+				"hotplug won't\n         work on fan-out "
+				"ports. Use warm-plug instead.\n");
+	}
+
+	return 0;
+
+ fail:
+	ata_dev_printk(dev, KERN_ERR,
+		       "failed to configure Port Multiplier (%s)\n", reason);
+	return rc;
+}
+
+static int sata_pmp_init_links(struct ata_port *ap, int nr_ports)
+{
+	struct ata_link *pmp_link = ap->pmp_link;
+	int i;
+
+	if (!pmp_link) {
+		pmp_link = kzalloc(sizeof(pmp_link[0]) * SATA_PMP_MAX_PORTS,
+				   GFP_NOIO);
+		if (!pmp_link)
+			return -ENOMEM;
+
+		for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
+			ata_link_init(ap, &pmp_link[i], i);
+
+		ap->pmp_link = pmp_link;
+	}
+
+	for (i = 0; i < nr_ports; i++) {
+		struct ata_link *link = &pmp_link[i];
+		struct ata_eh_context *ehc = &link->eh_context;
+
+		link->flags = 0;
+		ehc->i.probe_mask |= 1;
+		ehc->i.action |= ATA_EH_SOFTRESET;
+		ehc->i.flags |= ATA_EHI_RESUME_LINK;
+	}
+
+	return 0;
+}
+
+static void sata_pmp_quirks(struct ata_port *ap)
+{
+	u32 *gscr = ap->link.device->gscr;
+	u16 vendor = sata_pmp_gscr_vendor(gscr);
+	u16 devid = sata_pmp_gscr_devid(gscr);
+	struct ata_link *link;
+
+	if (vendor == 0x1095 && devid == 0x3726) {
+		/* sil3726 quirks */
+		ata_port_for_each_link(link, ap) {
+			/* SError.N need a kick in the ass to get working */
+			link->flags |= ATA_LFLAG_HRST_TO_RESUME;
+
+			/* class code report is unreliable */
+			if (link->pmp < 5)
+				link->flags |= ATA_LFLAG_ASSUME_ATA;
+
+			/* port 5 is for SEMB device and it doesn't like SRST */
+			if (link->pmp == 5)
+				link->flags |= ATA_LFLAG_NO_SRST |
+					       ATA_LFLAG_ASSUME_SEMB;
+		}
+	} else if (vendor == 0x1095 && devid == 0x4723) {
+		/* sil4723 quirks */
+		ata_port_for_each_link(link, ap) {
+			/* SError.N need a kick in the ass to get working */
+			link->flags |= ATA_LFLAG_HRST_TO_RESUME;
+
+			/* class code report is unreliable */
+			if (link->pmp < 2)
+				link->flags |= ATA_LFLAG_ASSUME_ATA;
+
+			/* the config device at port 2 locks up on SRST */
+			if (link->pmp == 2)
+				link->flags |= ATA_LFLAG_NO_SRST |
+					       ATA_LFLAG_ASSUME_ATA;
+		}
+	} else if (vendor == 0x1095 && devid == 0x4726) {
+		/* sil4726 quirks */
+		ata_port_for_each_link(link, ap) {
+			/* SError.N need a kick in the ass to get working */
+			link->flags |= ATA_LFLAG_HRST_TO_RESUME;
+
+			/* class code report is unreliable */
+			if (link->pmp < 5)
+				link->flags |= ATA_LFLAG_ASSUME_ATA;
+
+			/* The config device, which can be either at
+			 * port 0 or 5, locks up on SRST.
+			 */
+			if (link->pmp == 0 || link->pmp == 5)
+				link->flags |= ATA_LFLAG_NO_SRST |
+					       ATA_LFLAG_ASSUME_ATA;
+
+			/* Port 6 is for SEMB device which doesn't
+			 * like SRST either.
+			 */
+			if (link->pmp == 6)
+				link->flags |= ATA_LFLAG_NO_SRST |
+					       ATA_LFLAG_ASSUME_SEMB;
+		}
+	} else if (vendor == 0x1095 && (devid == 0x5723 || devid == 0x5733 ||
+					devid == 0x5734 || devid == 0x5744)) {
+		/* sil5723/5744 quirks */
+
+		/* sil5723/5744 has either two or three downstream
+		 * ports depending on operation mode.  The last port
+		 * is empty if any actual IO device is available or
+		 * occupied by a pseudo configuration device
+		 * otherwise.  Don't try hard to recover it.
+		 */
+		ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY;
+	} else if (vendor == 0x11ab && devid == 0x4140) {
+		/* Marvell 88SM4140 quirks.  Fan-out ports require PHY
+		 * reset to work; other than that, it behaves very
+		 * nicely.
+		 */
+		ata_port_for_each_link(link, ap)
+			link->flags |= ATA_LFLAG_HRST_TO_RESUME;
+	}
+}
+
+/**
+ *	sata_pmp_attach - attach a SATA PMP device
+ *	@dev: SATA PMP device to attach
+ *
+ *	Configure and attach SATA PMP device @dev.  This function is
+ *	also responsible for allocating and initializing PMP links.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+int sata_pmp_attach(struct ata_device *dev)
+{
+	struct ata_link *link = dev->link;
+	struct ata_port *ap = link->ap;
+	unsigned long flags;
+	struct ata_link *tlink;
+	int rc;
+
+	/* is it hanging off the right place? */
+	if (!(ap->flags & ATA_FLAG_PMP)) {
+		ata_dev_printk(dev, KERN_ERR,
+			       "host does not support Port Multiplier\n");
+		return -EINVAL;
+	}
+
+	if (!ata_is_host_link(link)) {
+		ata_dev_printk(dev, KERN_ERR,
+			       "Port Multipliers cannot be nested\n");
+		return -EINVAL;
+	}
+
+	if (dev->devno) {
+		ata_dev_printk(dev, KERN_ERR,
+			       "Port Multiplier must be the first device\n");
+		return -EINVAL;
+	}
+
+	WARN_ON(link->pmp != 0);
+	link->pmp = SATA_PMP_CTRL_PORT;
+
+	/* read GSCR block */
+	rc = sata_pmp_read_gscr(dev, dev->gscr);
+	if (rc)
+		goto fail;
+
+	/* config PMP */
+	rc = sata_pmp_configure(dev, 1);
+	if (rc)
+		goto fail;
+
+	rc = sata_pmp_init_links(ap, sata_pmp_gscr_ports(dev->gscr));
+	if (rc) {
+		ata_dev_printk(dev, KERN_INFO,
+			       "failed to initialize PMP links\n");
+		goto fail;
+	}
+
+	/* attach it */
+	spin_lock_irqsave(ap->lock, flags);
+	WARN_ON(ap->nr_pmp_links);
+	ap->nr_pmp_links = sata_pmp_gscr_ports(dev->gscr);
+	spin_unlock_irqrestore(ap->lock, flags);
+
+	sata_pmp_quirks(ap);
+
+	if (ap->ops->pmp_attach)
+		ap->ops->pmp_attach(ap);
+
+	ata_port_for_each_link(tlink, ap)
+		sata_link_init_spd(tlink);
+
+	return 0;
+
+ fail:
+	link->pmp = 0;
+	return rc;
+}
+
+/**
+ *	sata_pmp_detach - detach a SATA PMP device
+ *	@dev: SATA PMP device to detach
+ *
+ *	Detach SATA PMP device @dev.  This function is also
+ *	responsible for deconfiguring PMP links.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ */
+static void sata_pmp_detach(struct ata_device *dev)
+{
+	struct ata_link *link = dev->link;
+	struct ata_port *ap = link->ap;
+	struct ata_link *tlink;
+	unsigned long flags;
+
+	ata_dev_printk(dev, KERN_INFO, "Port Multiplier detaching\n");
+
+	WARN_ON(!ata_is_host_link(link) || dev->devno ||
+		link->pmp != SATA_PMP_CTRL_PORT);
+
+	if (ap->ops->pmp_detach)
+		ap->ops->pmp_detach(ap);
+
+	ata_port_for_each_link(tlink, ap)
+		ata_eh_detach_dev(tlink->device);
+
+	spin_lock_irqsave(ap->lock, flags);
+	ap->nr_pmp_links = 0;
+	link->pmp = 0;
+	spin_unlock_irqrestore(ap->lock, flags);
+}
+
+/**
+ *	sata_pmp_same_pmp - does new GSCR matches the configured PMP?
+ *	@dev: PMP device to compare against
+ *	@new_gscr: GSCR block of the new device
+ *
+ *	Compare @new_gscr against @dev and determine whether @dev is
+ *	the PMP described by @new_gscr.
+ *
+ *	LOCKING:
+ *	None.
+ *
+ *	RETURNS:
+ *	1 if @dev matches @new_gscr, 0 otherwise.
+ */
+static int sata_pmp_same_pmp(struct ata_device *dev, const u32 *new_gscr)
+{
+	const u32 *old_gscr = dev->gscr;
+	u16 old_vendor, new_vendor, old_devid, new_devid;
+	int old_nr_ports, new_nr_ports;
+
+	old_vendor = sata_pmp_gscr_vendor(old_gscr);
+	new_vendor = sata_pmp_gscr_vendor(new_gscr);
+	old_devid = sata_pmp_gscr_devid(old_gscr);
+	new_devid = sata_pmp_gscr_devid(new_gscr);
+	old_nr_ports = sata_pmp_gscr_ports(old_gscr);
+	new_nr_ports = sata_pmp_gscr_ports(new_gscr);
+
+	if (old_vendor != new_vendor) {
+		ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
+			       "vendor mismatch '0x%x' != '0x%x'\n",
+			       old_vendor, new_vendor);
+		return 0;
+	}
+
+	if (old_devid != new_devid) {
+		ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
+			       "device ID mismatch '0x%x' != '0x%x'\n",
+			       old_devid, new_devid);
+		return 0;
+	}
+
+	if (old_nr_ports != new_nr_ports) {
+		ata_dev_printk(dev, KERN_INFO, "Port Multiplier "
+			       "nr_ports mismatch '0x%x' != '0x%x'\n",
+			       old_nr_ports, new_nr_ports);
+		return 0;
+	}
+
+	return 1;
+}
+
+/**
+ *	sata_pmp_revalidate - revalidate SATA PMP
+ *	@dev: PMP device to revalidate
+ *	@new_class: new class code
+ *
+ *	Re-read GSCR block and make sure @dev is still attached to the
+ *	port and properly configured.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno otherwise.
+ */
+static int sata_pmp_revalidate(struct ata_device *dev, unsigned int new_class)
+{
+	struct ata_link *link = dev->link;
+	struct ata_port *ap = link->ap;
+	u32 *gscr = (void *)ap->sector_buf;
+	int rc;
+
+	DPRINTK("ENTER\n");
+
+	ata_eh_about_to_do(link, NULL, ATA_EH_REVALIDATE);
+
+	if (!ata_dev_enabled(dev)) {
+		rc = -ENODEV;
+		goto fail;
+	}
+
+	/* wrong class? */
+	if (ata_class_enabled(new_class) && new_class != ATA_DEV_PMP) {
+		rc = -ENODEV;
+		goto fail;
+	}
+
+	/* read GSCR */
+	rc = sata_pmp_read_gscr(dev, gscr);
+	if (rc)
+		goto fail;
+
+	/* is the pmp still there? */
+	if (!sata_pmp_same_pmp(dev, gscr)) {
+		rc = -ENODEV;
+		goto fail;
+	}
+
+	memcpy(dev->gscr, gscr, sizeof(gscr[0]) * SATA_PMP_GSCR_DWORDS);
+
+	rc = sata_pmp_configure(dev, 0);
+	if (rc)
+		goto fail;
+
+	ata_eh_done(link, NULL, ATA_EH_REVALIDATE);
+
+	DPRINTK("EXIT, rc=0\n");
+	return 0;
+
+ fail:
+	ata_dev_printk(dev, KERN_ERR,
+		       "PMP revalidation failed (errno=%d)\n", rc);
+	DPRINTK("EXIT, rc=%d\n", rc);
+	return rc;
+}
+
+/**
+ *	sata_pmp_revalidate_quick - revalidate SATA PMP quickly
+ *	@dev: PMP device to revalidate
+ *
+ *	Make sure the attached PMP is accessible.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno otherwise.
+ */
+static int sata_pmp_revalidate_quick(struct ata_device *dev)
+{
+	u32 prod_id;
+	int rc;
+
+	rc = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id);
+	if (rc) {
+		ata_dev_printk(dev, KERN_ERR, "failed to read PMP product ID\n");
+		return rc;
+	}
+
+	if (prod_id != dev->gscr[SATA_PMP_GSCR_PROD_ID]) {
+		ata_dev_printk(dev, KERN_ERR, "PMP product ID mismatch\n");
+		/* something weird is going on, request full PMP recovery */
+		return -EIO;
+	}
+
+	return 0;
+}
+
+/**
+ *	sata_pmp_eh_recover_pmp - recover PMP
+ *	@ap: ATA port PMP is attached to
+ *	@prereset: prereset method (can be NULL)
+ *	@softreset: softreset method
+ *	@hardreset: hardreset method
+ *	@postreset: postreset method (can be NULL)
+ *
+ *	Recover PMP attached to @ap.  Recovery procedure is somewhat
+ *	similar to that of ata_eh_recover() except that reset should
+ *	always be performed in hard->soft sequence and recovery
+ *	failure results in PMP detachment.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+static int sata_pmp_eh_recover_pmp(struct ata_port *ap,
+		ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
+		ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
+{
+	struct ata_link *link = &ap->link;
+	struct ata_eh_context *ehc = &link->eh_context;
+	struct ata_device *dev = link->device;
+	int tries = ATA_EH_PMP_TRIES;
+	int detach = 0, rc = 0;
+	int reval_failed = 0;
+
+	DPRINTK("ENTER\n");
+
+	if (dev->flags & ATA_DFLAG_DETACH) {
+		detach = 1;
+		goto fail;
+	}
+
+ retry:
+	ehc->classes[0] = ATA_DEV_UNKNOWN;
+
+	if (ehc->i.action & ATA_EH_RESET_MASK) {
+		struct ata_link *tlink;
+
+		ata_eh_freeze_port(ap);
+
+		/* reset */
+		ehc->i.action = ATA_EH_HARDRESET;
+		rc = ata_eh_reset(link, 0, prereset, softreset, hardreset,
+				  postreset);
+		if (rc) {
+			ata_link_printk(link, KERN_ERR,
+					"failed to reset PMP, giving up\n");
+			goto fail;
+		}
+
+		ata_eh_thaw_port(ap);
+
+		/* PMP is reset, SErrors cannot be trusted, scan all */
+		ata_port_for_each_link(tlink, ap)
+			ata_ehi_schedule_probe(&tlink->eh_context.i);
+	}
+
+	/* If revalidation is requested, revalidate and reconfigure;
+	 * otherwise, do quick revalidation.
+	 */
+	if (ehc->i.action & ATA_EH_REVALIDATE)
+		rc = sata_pmp_revalidate(dev, ehc->classes[0]);
+	else
+		rc = sata_pmp_revalidate_quick(dev);
+
+	if (rc) {
+		tries--;
+
+		if (rc == -ENODEV) {
+			ehc->i.probe_mask |= 1;
+			detach = 1;
+			/* give it just two more chances */
+			tries = min(tries, 2);
+		}
+
+		if (tries) {
+			int sleep = ehc->i.flags & ATA_EHI_DID_RESET;
+
+			/* consecutive revalidation failures? speed down */
+			if (reval_failed)
+				sata_down_spd_limit(link);
+			else
+				reval_failed = 1;
+
+			ata_dev_printk(dev, KERN_WARNING,
+				       "retrying hardreset%s\n",
+				       sleep ? " in 5 secs" : "");
+			if (sleep)
+				ssleep(5);
+			ehc->i.action |= ATA_EH_HARDRESET;
+			goto retry;
+		} else {
+			ata_dev_printk(dev, KERN_ERR, "failed to recover PMP "
+				       "after %d tries, giving up\n",
+				       ATA_EH_PMP_TRIES);
+			goto fail;
+		}
+	}
+
+	/* okay, PMP resurrected */
+	ehc->i.flags = 0;
+
+	DPRINTK("EXIT, rc=0\n");
+	return 0;
+
+ fail:
+	sata_pmp_detach(dev);
+	if (detach)
+		ata_eh_detach_dev(dev);
+	else
+		ata_dev_disable(dev);
+
+	DPRINTK("EXIT, rc=%d\n", rc);
+	return rc;
+}
+
+static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap)
+{
+	struct ata_link *link;
+	unsigned long flags;
+	int rc;
+
+	spin_lock_irqsave(ap->lock, flags);
+
+	ata_port_for_each_link(link, ap) {
+		if (!(link->flags & ATA_LFLAG_DISABLED))
+			continue;
+
+		spin_unlock_irqrestore(ap->lock, flags);
+
+		/* Some PMPs require hardreset sequence to get
+		 * SError.N working.
+		 */
+		if ((link->flags & ATA_LFLAG_HRST_TO_RESUME) &&
+		    (link->eh_context.i.flags & ATA_EHI_RESUME_LINK))
+			sata_link_hardreset(link, sata_deb_timing_normal,
+					    jiffies + ATA_TMOUT_INTERNAL_QUICK);
+
+		/* unconditionally clear SError.N */
+		rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
+		if (rc) {
+			ata_link_printk(link, KERN_ERR, "failed to clear "
+					"SError.N (errno=%d)\n", rc);
+			return rc;
+		}
+
+		spin_lock_irqsave(ap->lock, flags);
+	}
+
+	spin_unlock_irqrestore(ap->lock, flags);
+
+	return 0;
+}
+
+static int sata_pmp_handle_link_fail(struct ata_link *link, int *link_tries)
+{
+	struct ata_port *ap = link->ap;
+	unsigned long flags;
+
+	if (link_tries[link->pmp] && --link_tries[link->pmp])
+		return 1;
+
+	/* disable this link */
+	if (!(link->flags & ATA_LFLAG_DISABLED)) {
+		ata_link_printk(link, KERN_WARNING,
+			"failed to recover link after %d tries, disabling\n",
+			ATA_EH_PMP_LINK_TRIES);
+
+		spin_lock_irqsave(ap->lock, flags);
+		link->flags |= ATA_LFLAG_DISABLED;
+		spin_unlock_irqrestore(ap->lock, flags);
+	}
+
+	ata_dev_disable(link->device);
+	link->eh_context.i.action = 0;
+
+	return 0;
+}
+
+/**
+ *	sata_pmp_eh_recover - recover PMP-enabled port
+ *	@ap: ATA port to recover
+ *	@prereset: prereset method (can be NULL)
+ *	@softreset: softreset method
+ *	@hardreset: hardreset method
+ *	@postreset: postreset method (can be NULL)
+ *	@pmp_prereset: PMP prereset method (can be NULL)
+ *	@pmp_softreset: PMP softreset method (can be NULL)
+ *	@pmp_hardreset: PMP hardreset method (can be NULL)
+ *	@pmp_postreset: PMP postreset method (can be NULL)
+ *
+ *	Drive EH recovery operation for PMP enabled port @ap.  This
+ *	function recovers host and PMP ports with proper retrials and
+ *	fallbacks.  Actual recovery operations are performed using
+ *	ata_eh_recover() and sata_pmp_eh_recover_pmp().
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	0 on success, -errno on failure.
+ */
+static int sata_pmp_eh_recover(struct ata_port *ap,
+		ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
+		ata_reset_fn_t hardreset, ata_postreset_fn_t postreset,
+		ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
+		ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset)
+{
+	int pmp_tries, link_tries[SATA_PMP_MAX_PORTS];
+	struct ata_link *pmp_link = &ap->link;
+	struct ata_device *pmp_dev = pmp_link->device;
+	struct ata_eh_context *pmp_ehc = &pmp_link->eh_context;
+	struct ata_link *link;
+	struct ata_device *dev;
+	u32 gscr_error, sntf;
+	int cnt, rc;
+
+	pmp_tries = ATA_EH_PMP_TRIES;
+	ata_port_for_each_link(link, ap)
+		link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES;
+
+ retry:
+	/* PMP attached? */
+	if (!ap->nr_pmp_links) {
+		rc = ata_eh_recover(ap, prereset, softreset, hardreset,
+				    postreset, NULL);
+		if (rc) {
+			ata_link_for_each_dev(dev, &ap->link)
+				ata_dev_disable(dev);
+			return rc;
+		}
+
+		if (pmp_dev->class != ATA_DEV_PMP)
+			return 0;
+
+		/* new PMP online */
+		ata_port_for_each_link(link, ap)
+			link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES;
+
+		/* fall through */
+	}
+
+	/* recover pmp */
+	rc = sata_pmp_eh_recover_pmp(ap, prereset, softreset, hardreset,
+				     postreset);
+	if (rc)
+		goto pmp_fail;
+
+	/* handle disabled links */
+	rc = sata_pmp_eh_handle_disabled_links(ap);
+	if (rc)
+		goto pmp_fail;
+
+	/* recover links */
+	rc = ata_eh_recover(ap, pmp_prereset, pmp_softreset, pmp_hardreset,
+			    pmp_postreset, &link);
+	if (rc)
+		goto link_fail;
+
+	/* Connection status might have changed while resetting other
+	 * links, check SATA_PMP_GSCR_ERROR before returning.
+	 */
+
+	/* clear SNotification */
+	rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
+	if (rc == 0)
+		sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);
+
+	/* enable notification */
+	if (pmp_dev->flags & ATA_DFLAG_AN) {
+		pmp_dev->gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY;
+
+		rc = sata_pmp_write(pmp_dev->link, SATA_PMP_GSCR_FEAT_EN,
+				    pmp_dev->gscr[SATA_PMP_GSCR_FEAT_EN]);
+		if (rc) {
+			ata_dev_printk(pmp_dev, KERN_ERR,
+				       "failed to write PMP_FEAT_EN\n");
+			goto pmp_fail;
+		}
+	}
+
+	/* check GSCR_ERROR */
+	rc = sata_pmp_read(pmp_link, SATA_PMP_GSCR_ERROR, &gscr_error);
+	if (rc) {
+		ata_dev_printk(pmp_dev, KERN_ERR,
+			       "failed to read PMP_GSCR_ERROR\n");
+		goto pmp_fail;
+	}
+
+	cnt = 0;
+	ata_port_for_each_link(link, ap) {
+		if (!(gscr_error & (1 << link->pmp)))
+			continue;
+
+		if (sata_pmp_handle_link_fail(link, link_tries)) {
+			ata_ehi_hotplugged(&link->eh_context.i);
+			cnt++;
+		} else {
+			ata_link_printk(link, KERN_WARNING,
+				"PHY status changed but maxed out on retries, "
+				"giving up\n");
+			ata_link_printk(link, KERN_WARNING,
+				"Manully issue scan to resume this link\n");
+		}
+	}
+
+	if (cnt) {
+		ata_port_printk(ap, KERN_INFO, "PMP SError.N set for some "
+				"ports, repeating recovery\n");
+		goto retry;
+	}
+
+	return 0;
+
+ link_fail:
+	if (sata_pmp_handle_link_fail(link, link_tries)) {
+		pmp_ehc->i.action |= ATA_EH_HARDRESET;
+		goto retry;
+	}
+
+	/* fall through */
+ pmp_fail:
+	/* Control always ends up here after detaching PMP.  Shut up
+	 * and return if we're unloading.
+	 */
+	if (ap->pflags & ATA_PFLAG_UNLOADING)
+		return rc;
+
+	if (!ap->nr_pmp_links)
+		goto retry;
+
+	if (--pmp_tries) {
+		ata_port_printk(ap, KERN_WARNING,
+				"failed to recover PMP, retrying in 5 secs\n");
+		pmp_ehc->i.action |= ATA_EH_HARDRESET;
+		ssleep(5);
+		goto retry;
+	}
+
+	ata_port_printk(ap, KERN_ERR,
+			"failed to recover PMP after %d tries, giving up\n",
+			ATA_EH_PMP_TRIES);
+	sata_pmp_detach(pmp_dev);
+	ata_dev_disable(pmp_dev);
+
+	return rc;
+}
+
+/**
+ *	sata_pmp_do_eh - do standard error handling for PMP-enabled host
+ *	@ap: host port to handle error for
+ *	@prereset: prereset method (can be NULL)
+ *	@softreset: softreset method
+ *	@hardreset: hardreset method
+ *	@postreset: postreset method (can be NULL)
+ *	@pmp_prereset: PMP prereset method (can be NULL)
+ *	@pmp_softreset: PMP softreset method (can be NULL)
+ *	@pmp_hardreset: PMP hardreset method (can be NULL)
+ *	@pmp_postreset: PMP postreset method (can be NULL)
+ *
+ *	Perform standard error handling sequence for PMP-enabled host
+ *	@ap.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ */
+void sata_pmp_do_eh(struct ata_port *ap,
+		ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
+		ata_reset_fn_t hardreset, ata_postreset_fn_t postreset,
+		ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
+		ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset)
+{
+	ata_eh_autopsy(ap);
+	ata_eh_report(ap);
+	sata_pmp_eh_recover(ap, prereset, softreset, hardreset, postreset,
+			    pmp_prereset, pmp_softreset, pmp_hardreset,
+			    pmp_postreset);
+	ata_eh_finish(ap);
+}
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index ebe22982e80..a9b9c9e1e10 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -153,6 +153,11 @@ extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
 extern void ata_scsi_dev_rescan(struct work_struct *work);
 extern int ata_bus_probe(struct ata_port *ap);
 
+/* libata-pmp.c */
+extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
+extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
+extern int sata_pmp_attach(struct ata_device *dev);
+
 /* libata-eh.c */
 extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 extern void ata_scsi_error(struct Scsi_Host *host);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index f9ed198e4fc..3cfdb5f6762 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -944,6 +944,25 @@ extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bit
 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
 #endif /* CONFIG_PCI */
 
+/*
+ * PMP
+ */
+extern void sata_pmp_read_init_tf(struct ata_taskfile *tf,
+				  struct ata_device *dev, int pmp, int reg);
+extern u32 sata_pmp_read_val(const struct ata_taskfile *tf);
+extern void sata_pmp_write_init_tf(struct ata_taskfile *tf,
+				   struct ata_device *dev,
+				   int pmp, int reg, u32 val);
+extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
+extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
+				  unsigned long deadline);
+extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
+extern void sata_pmp_do_eh(struct ata_port *ap,
+		ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
+		ata_reset_fn_t hardreset, ata_postreset_fn_t postreset,
+		ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
+		ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset);
+
 /*
  * EH
  */
-- 
cgit v1.2.3-70-g09d2


From 633273a3ed1cf37ced90475b0f95cf81deab04f1 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:54 +0900
Subject: libata-pmp: hook PMP support and enable it

Hook PMP support into libata and enable it.  Connect SCR and probing
functions, and update ata_dev_classify() to detect PMP.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 111 +++++++++++++++++++++++++++++++++-------------
 drivers/ata/libata-eh.c   |  18 ++++++--
 drivers/ata/libata.h      |   2 +-
 3 files changed, 96 insertions(+), 35 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 9e7f55b7104..d3e78d97529 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -670,29 +670,49 @@ static unsigned int ata_devchk(struct ata_port *ap, unsigned int device)
  *	None.
  *
  *	RETURNS:
- *	Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
- *	the event of failure.
+ *	Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
+ *	%ATA_DEV_UNKNOWN the event of failure.
  */
-
 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
 {
 	/* Apple's open source Darwin code hints that some devices only
 	 * put a proper signature into the LBA mid/high registers,
 	 * So, we only check those.  It's sufficient for uniqueness.
+	 *
+	 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
+	 * signatures for ATA and ATAPI devices attached on SerialATA,
+	 * 0x3c/0xc3 and 0x69/0x96 respectively.  However, SerialATA
+	 * spec has never mentioned about using different signatures
+	 * for ATA/ATAPI devices.  Then, Serial ATA II: Port
+	 * Multiplier specification began to use 0x69/0x96 to identify
+	 * port multpliers and 0x3c/0xc3 to identify SEMB device.
+	 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
+	 * 0x69/0x96 shortly and described them as reserved for
+	 * SerialATA.
+	 *
+	 * We follow the current spec and consider that 0x69/0x96
+	 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
 	 */
-
-	if (((tf->lbam == 0) && (tf->lbah == 0)) ||
-	    ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
+	if ((tf->lbam == 0) && (tf->lbah == 0)) {
 		DPRINTK("found ATA device by sig\n");
 		return ATA_DEV_ATA;
 	}
 
-	if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
-	    ((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
+	if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
 		DPRINTK("found ATAPI device by sig\n");
 		return ATA_DEV_ATAPI;
 	}
 
+	if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
+		DPRINTK("found PMP device by sig\n");
+		return ATA_DEV_PMP;
+	}
+
+	if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
+		printk("ata: SEMB device ignored\n");
+		return ATA_DEV_SEMB_UNSUP; /* not yet */
+	}
+
 	DPRINTK("unknown device\n");
 	return ATA_DEV_UNKNOWN;
 }
@@ -3426,6 +3446,12 @@ int ata_std_prereset(struct ata_link *link, unsigned long deadline)
 	    (link->flags & ATA_LFLAG_HRST_TO_RESUME))
 		ehc->i.action |= ATA_EH_HARDRESET;
 
+	/* Some PMPs don't work with only SRST, force hardreset if PMP
+	 * is supported.
+	 */
+	if (ap->flags & ATA_FLAG_PMP)
+		ehc->i.action |= ATA_EH_HARDRESET;
+
 	/* if we're about to do hardreset, nothing more to do */
 	if (ehc->i.action & ATA_EH_HARDRESET)
 		return 0;
@@ -3616,6 +3642,16 @@ int sata_std_hardreset(struct ata_link *link, unsigned int *class,
 	/* wait a while before checking status, see SRST for more info */
 	msleep(150);
 
+	/* If PMP is supported, we have to do follow-up SRST.  Note
+	 * that some PMPs don't send D2H Reg FIS after hardreset at
+	 * all if the first port is empty.  Wait for it just for a
+	 * second and request follow-up SRST.
+	 */
+	if (ap->flags & ATA_FLAG_PMP) {
+		ata_wait_ready(ap, jiffies + HZ);
+		return -EAGAIN;
+	}
+
 	rc = ata_wait_ready(ap, deadline);
 	/* link occupied, -ENODEV too is an error */
 	if (rc) {
@@ -5966,22 +6002,26 @@ int sata_scr_valid(struct ata_link *link)
  *	@val: Place to store read value
  *
  *	Read SCR register @reg of @link into *@val.  This function is
- *	guaranteed to succeed if the cable type of the port is SATA
- *	and the port implements ->scr_read.
+ *	guaranteed to succeed if @link is ap->link, the cable type of
+ *	the port is SATA and the port implements ->scr_read.
  *
  *	LOCKING:
- *	None.
+ *	None if @link is ap->link.  Kernel thread context otherwise.
  *
  *	RETURNS:
  *	0 on success, negative errno on failure.
  */
 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
 {
-	struct ata_port *ap = link->ap;
+	if (ata_is_host_link(link)) {
+		struct ata_port *ap = link->ap;
 
-	if (sata_scr_valid(link))
-		return ap->ops->scr_read(ap, reg, val);
-	return -EOPNOTSUPP;
+		if (sata_scr_valid(link))
+			return ap->ops->scr_read(ap, reg, val);
+		return -EOPNOTSUPP;
+	}
+
+	return sata_pmp_scr_read(link, reg, val);
 }
 
 /**
@@ -5991,22 +6031,26 @@ int sata_scr_read(struct ata_link *link, int reg, u32 *val)
  *	@val: value to write
  *
  *	Write @val to SCR register @reg of @link.  This function is
- *	guaranteed to succeed if the cable type of the port is SATA
- *	and the port implements ->scr_read.
+ *	guaranteed to succeed if @link is ap->link, the cable type of
+ *	the port is SATA and the port implements ->scr_read.
  *
  *	LOCKING:
- *	None.
+ *	None if @link is ap->link.  Kernel thread context otherwise.
  *
  *	RETURNS:
  *	0 on success, negative errno on failure.
  */
 int sata_scr_write(struct ata_link *link, int reg, u32 val)
 {
-	struct ata_port *ap = link->ap;
+	if (ata_is_host_link(link)) {
+		struct ata_port *ap = link->ap;
 
-	if (sata_scr_valid(link))
-		return ap->ops->scr_write(ap, reg, val);
-	return -EOPNOTSUPP;
+		if (sata_scr_valid(link))
+			return ap->ops->scr_write(ap, reg, val);
+		return -EOPNOTSUPP;
+	}
+
+	return sata_pmp_scr_write(link, reg, val);
 }
 
 /**
@@ -6019,23 +6063,27 @@ int sata_scr_write(struct ata_link *link, int reg, u32 val)
  *	function performs flush after writing to the register.
  *
  *	LOCKING:
- *	None.
+ *	None if @link is ap->link.  Kernel thread context otherwise.
  *
  *	RETURNS:
  *	0 on success, negative errno on failure.
  */
 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
 {
-	struct ata_port *ap = link->ap;
-	int rc;
+	if (ata_is_host_link(link)) {
+		struct ata_port *ap = link->ap;
+		int rc;
 
-	if (sata_scr_valid(link)) {
-		rc = ap->ops->scr_write(ap, reg, val);
-		if (rc == 0)
-			rc = ap->ops->scr_read(ap, reg, &val);
-		return rc;
+		if (sata_scr_valid(link)) {
+			rc = ap->ops->scr_write(ap, reg, val);
+			if (rc == 0)
+				rc = ap->ops->scr_read(ap, reg, &val);
+			return rc;
+		}
+		return -EOPNOTSUPP;
 	}
-	return -EOPNOTSUPP;
+
+	return sata_pmp_scr_write(link, reg, val);
 }
 
 /**
@@ -6424,6 +6472,7 @@ static void ata_host_release(struct device *gendev, void *res)
 		if (ap->scsi_host)
 			scsi_host_put(ap->scsi_host);
 
+		kfree(ap->pmp_link);
 		kfree(ap);
 		host->ports[i] = NULL;
 	}
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 687419b6670..5f2c0f376f7 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2209,6 +2209,8 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
 			readid_flags |= ATA_READID_POSTRESET;
 
 		if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) {
+			WARN_ON(dev->class == ATA_DEV_PMP);
+
 			if (ata_link_offline(link)) {
 				rc = -EIO;
 				goto err;
@@ -2234,8 +2236,11 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
 			   ata_class_enabled(ehc->classes[dev->devno])) {
 			dev->class = ehc->classes[dev->devno];
 
-			rc = ata_dev_read_id(dev, &dev->class, readid_flags,
-					     dev->id);
+			if (dev->class == ATA_DEV_PMP)
+				rc = sata_pmp_attach(dev);
+			else
+				rc = ata_dev_read_id(dev, &dev->class,
+						     readid_flags, dev->id);
 			switch (rc) {
 			case 0:
 				new_mask |= 1 << dev->devno;
@@ -2264,7 +2269,8 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
 	 * device detection messages backwards.
 	 */
 	ata_link_for_each_dev(dev, link) {
-		if (!(new_mask & (1 << dev->devno)))
+		if (!(new_mask & (1 << dev->devno)) ||
+		    dev->class == ATA_DEV_PMP)
 			continue;
 
 		ehc->i.flags |= ATA_EHI_PRINTINFO;
@@ -2521,6 +2527,12 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 		if (rc)
 			goto dev_fail;
 
+		/* if PMP got attached, return, pmp EH will take care of it */
+		if (link->device->class == ATA_DEV_PMP) {
+			ehc->i.action = 0;
+			return 0;
+		}
+
 		/* configure transfer mode if necessary */
 		if (ehc->i.flags & ATA_EHI_SETMODE) {
 			rc = ata_set_mode(link, &dev);
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index a9b9c9e1e10..a44172fd1f5 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -29,7 +29,7 @@
 #define __LIBATA_H__
 
 #define DRV_NAME	"libata"
-#define DRV_VERSION	"2.21"	/* must be exactly four chars */
+#define DRV_VERSION	"3.00"	/* must be exactly four chars */
 
 struct ata_scsi_args {
 	struct ata_device	*dev;
-- 
cgit v1.2.3-70-g09d2


From d0df8b5d0fb547a3351c2a4b1ded7f7cde5d713a Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:54 +0900
Subject: libata-pmp: extend ACPI support to cover PMP

Extend ata_acpi_associate_sata_port() such that it can handle PMP and
call it when PMP is attached and detached.

Build breakage when !CONFIG_ATA_ACPI was spotted and fixed by Petr
Vandrovec.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-acpi.c | 36 ++++++++++++++++++++++++++++++++----
 drivers/ata/libata-pmp.c  |  4 ++++
 drivers/ata/libata.h      |  2 ++
 3 files changed, 38 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index dc9842ec6f0..a276c06dda9 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -40,12 +40,40 @@ static int is_pci_dev(struct device *dev)
 	return (dev->bus == &pci_bus_type);
 }
 
-static void ata_acpi_associate_sata_port(struct ata_port *ap)
+/**
+ * ata_acpi_associate_sata_port - associate SATA port with ACPI objects
+ * @ap: target SATA port
+ *
+ * Look up ACPI objects associated with @ap and initialize acpi_handle
+ * fields of @ap, the port and devices accordingly.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+void ata_acpi_associate_sata_port(struct ata_port *ap)
 {
-	acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
+	WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
+
+	if (!ap->nr_pmp_links) {
+		acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
+
+		ap->link.device->acpi_handle =
+			acpi_get_child(ap->host->acpi_handle, adr);
+	} else {
+		struct ata_link *link;
+
+		ap->link.device->acpi_handle = NULL;
 
-	ap->link.device->acpi_handle =
-		acpi_get_child(ap->host->acpi_handle, adr);
+		ata_port_for_each_link(link, ap) {
+			acpi_integer adr = SATA_ADR(ap->port_no, link->pmp);
+
+			link->device->acpi_handle =
+				acpi_get_child(ap->host->acpi_handle, adr);
+		}
+	}
 }
 
 static void ata_acpi_associate_ide_port(struct ata_port *ap)
diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index 671d171055a..eeffce636d0 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -607,6 +607,8 @@ int sata_pmp_attach(struct ata_device *dev)
 	ata_port_for_each_link(tlink, ap)
 		sata_link_init_spd(tlink);
 
+	ata_acpi_associate_sata_port(ap);
+
 	return 0;
 
  fail:
@@ -646,6 +648,8 @@ static void sata_pmp_detach(struct ata_device *dev)
 	ap->nr_pmp_links = 0;
 	link->pmp = 0;
 	spin_unlock_irqrestore(ap->lock, flags);
+
+	ata_acpi_associate_sata_port(ap);
 }
 
 /**
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index a44172fd1f5..f8bd955c5ba 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -103,11 +103,13 @@ extern struct ata_port *ata_port_alloc(struct ata_host *host);
 
 /* libata-acpi.c */
 #ifdef CONFIG_ATA_ACPI
+extern void ata_acpi_associate_sata_port(struct ata_port *ap);
 extern void ata_acpi_associate(struct ata_host *host);
 extern int ata_acpi_on_suspend(struct ata_port *ap);
 extern void ata_acpi_on_resume(struct ata_port *ap);
 extern int ata_acpi_on_devcfg(struct ata_device *adev);
 #else
+static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { }
 static inline void ata_acpi_associate(struct ata_host *host) { }
 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
 static inline void ata_acpi_on_resume(struct ata_port *ap) { }
-- 
cgit v1.2.3-70-g09d2


From 31f88384443b3e0d7e2c9d36a96647b7e82edad3 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:54 +0900
Subject: libata-pmp: implement qc_defer for command switching PMP support

Implement sata_pmp_qc_defer_cmd_switch() - standard qc_defer for
command switching PMP support.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c |  1 +
 drivers/ata/libata-pmp.c  | 30 ++++++++++++++++++++++++++++++
 include/linux/libata.h    |  1 +
 3 files changed, 32 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d3e78d97529..5532a6564d0 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -7303,6 +7303,7 @@ EXPORT_SYMBOL_GPL(ata_pci_default_filter);
 EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
 #endif /* CONFIG_PCI */
 
+EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
 EXPORT_SYMBOL_GPL(sata_pmp_read_init_tf);
 EXPORT_SYMBOL_GPL(sata_pmp_read_val);
 EXPORT_SYMBOL_GPL(sata_pmp_write_init_tf);
diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index eeffce636d0..f6c4b11336e 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -69,6 +69,36 @@ static int sata_pmp_write(struct ata_link *link, int reg, u32 val)
 	return rc;
 }
 
+/**
+ *	sata_pmp_qc_defer_cmd_switch - qc_defer for command switching PMP
+ *	@qc: ATA command in question
+ *
+ *	A host which has command switching PMP support cannot issue
+ *	commands to multiple links simultaneously.
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ *
+ *	RETURNS:
+ *	ATA_DEFER_* if deferring is needed, 0 otherwise.
+ */
+int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc)
+{
+	struct ata_link *link = qc->dev->link;
+	struct ata_port *ap = link->ap;
+
+	if (ap->excl_link == NULL || ap->excl_link == link) {
+		if (ap->nr_active_links == 0 || ata_link_active(link)) {
+			qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
+			return ata_std_qc_defer(qc);
+		}
+
+		ap->excl_link = link;
+	}
+
+	return ATA_DEFER_PORT;
+}
+
 /**
  *	sata_pmp_read_init_tf - initialize TF for PMP read
  *	@tf: taskfile to initialize
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 3cfdb5f6762..ca296a575c4 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -947,6 +947,7 @@ extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
 /*
  * PMP
  */
+extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
 extern void sata_pmp_read_init_tf(struct ata_taskfile *tf,
 				  struct ata_device *dev, int pmp, int reg);
 extern u32 sata_pmp_read_val(const struct ata_taskfile *tf);
-- 
cgit v1.2.3-70-g09d2


From 3454dc6922dc550c0d3ccf292c4e227403b10b6e Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:54 +0900
Subject: sata_sil24: implement PMP support

Implement PMP support.  sil24 supports full FIS-switching.  However,
it has a PMP DMA CS errata which requires port-wide resetting if
commands are outstanding to three or more devices when an error occurs
on one of them.

ATAPI commands often result in CHECK SENSE and it's crucial to not
reset them before fetching sense data.  Unfortunately, ATAPI CHECK
SENSE causes a lot of problem if command is outstanding to any other
device usually resulting in port-wide reset.  So, sata_sil24
implements sil24_qc_defer() which guarantees ATAPI command is run by
itself.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_sil24.c | 227 ++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 206 insertions(+), 21 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index b4f81eb8bbb..03bfbb65c53 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -30,7 +30,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"sata_sil24"
-#define DRV_VERSION	"1.0"
+#define DRV_VERSION	"1.1"
 
 /*
  * Port request block (PRB) 32 bytes
@@ -238,7 +238,7 @@ enum {
 	SIL24_COMMON_FLAGS	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 				  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
 				  ATA_FLAG_NCQ | ATA_FLAG_ACPI_SATA |
-				  ATA_FLAG_AN,
+				  ATA_FLAG_AN | ATA_FLAG_PMP,
 	SIL24_COMMON_LFLAGS	= ATA_LFLAG_SKIP_D2H_BSY,
 	SIL24_FLAG_PCIX_IRQ_WOC	= (1 << 24), /* IRQ loss errata on PCI-X */
 
@@ -330,9 +330,14 @@ static u8 sil24_check_status(struct ata_port *ap);
 static int sil24_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val);
 static int sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
+static int sil24_qc_defer(struct ata_queued_cmd *qc);
 static void sil24_qc_prep(struct ata_queued_cmd *qc);
 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
 static void sil24_irq_clear(struct ata_port *ap);
+static void sil24_pmp_attach(struct ata_port *ap);
+static void sil24_pmp_detach(struct ata_port *ap);
+static int sil24_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val);
+static int sil24_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val);
 static void sil24_freeze(struct ata_port *ap);
 static void sil24_thaw(struct ata_port *ap);
 static void sil24_error_handler(struct ata_port *ap);
@@ -341,6 +346,7 @@ static int sil24_port_start(struct ata_port *ap);
 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
 #ifdef CONFIG_PM
 static int sil24_pci_device_resume(struct pci_dev *pdev);
+static int sil24_port_resume(struct ata_port *ap);
 #endif
 
 static const struct pci_device_id sil24_pci_tbl[] = {
@@ -393,7 +399,7 @@ static const struct ata_port_operations sil24_ops = {
 
 	.tf_read		= sil24_tf_read,
 
-	.qc_defer		= ata_std_qc_defer,
+	.qc_defer		= sil24_qc_defer,
 	.qc_prep		= sil24_qc_prep,
 	.qc_issue		= sil24_qc_issue,
 
@@ -402,12 +408,21 @@ static const struct ata_port_operations sil24_ops = {
 	.scr_read		= sil24_scr_read,
 	.scr_write		= sil24_scr_write,
 
+	.pmp_attach		= sil24_pmp_attach,
+	.pmp_detach		= sil24_pmp_detach,
+	.pmp_read		= sil24_pmp_read,
+	.pmp_write		= sil24_pmp_write,
+
 	.freeze			= sil24_freeze,
 	.thaw			= sil24_thaw,
 	.error_handler		= sil24_error_handler,
 	.post_internal_cmd	= sil24_post_internal_cmd,
 
 	.port_start		= sil24_port_start,
+
+#ifdef CONFIG_PM
+	.port_resume		= sil24_port_resume,
+#endif
 };
 
 /*
@@ -521,11 +536,40 @@ static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
 	*tf = pp->tf;
 }
 
+static void sil24_config_pmp(struct ata_port *ap, int attached)
+{
+	void __iomem *port = ap->ioaddr.cmd_addr;
+
+	if (attached)
+		writel(PORT_CS_PMP_EN, port + PORT_CTRL_STAT);
+	else
+		writel(PORT_CS_PMP_EN, port + PORT_CTRL_CLR);
+}
+
+static void sil24_clear_pmp(struct ata_port *ap)
+{
+	void __iomem *port = ap->ioaddr.cmd_addr;
+	int i;
+
+	writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
+
+	for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
+		void __iomem *pmp_base = port + PORT_PMP + i * PORT_PMP_SIZE;
+
+		writel(0, pmp_base + PORT_PMP_STATUS);
+		writel(0, pmp_base + PORT_PMP_QACTIVE);
+	}
+}
+
 static int sil24_init_port(struct ata_port *ap)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
 	u32 tmp;
 
+	/* clear PMP error status */
+	if (ap->nr_pmp_links)
+		sil24_clear_pmp(ap);
+
 	writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
 	ata_wait_register(port + PORT_CTRL_STAT,
 			  PORT_CS_INIT, PORT_CS_INIT, 10, 100);
@@ -640,7 +684,7 @@ static int sil24_do_softreset(struct ata_link *link, unsigned int *class,
 static int sil24_softreset(struct ata_link *link, unsigned int *class,
 			   unsigned long deadline)
 {
-	return sil24_do_softreset(link, class, 0, deadline);
+	return sil24_do_softreset(link, class, SATA_PMP_CTRL_PORT, deadline);
 }
 
 static int sil24_hardreset(struct ata_link *link, unsigned int *class,
@@ -708,6 +752,38 @@ static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
 	}
 }
 
+static int sil24_qc_defer(struct ata_queued_cmd *qc)
+{
+	struct ata_link *link = qc->dev->link;
+	struct ata_port *ap = link->ap;
+	u8 prot = qc->tf.protocol;
+	int is_atapi = (prot == ATA_PROT_ATAPI ||
+			prot == ATA_PROT_ATAPI_NODATA ||
+			prot == ATA_PROT_ATAPI_DMA);
+
+	/* ATAPI commands completing with CHECK_SENSE cause various
+	 * weird problems if other commands are active.  PMP DMA CS
+	 * errata doesn't cover all and HSM violation occurs even with
+	 * only one other device active.  Always run an ATAPI command
+	 * by itself.
+	 */
+	if (unlikely(ap->excl_link)) {
+		if (link == ap->excl_link) {
+			if (ap->nr_active_links)
+				return ATA_DEFER_PORT;
+			qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
+		} else
+			return ATA_DEFER_PORT;
+	} else if (unlikely(is_atapi)) {
+		ap->excl_link = link;
+		if (ap->nr_active_links)
+			return ATA_DEFER_PORT;
+		qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
+	}
+
+	return ata_std_qc_defer(qc);
+}
+
 static void sil24_qc_prep(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
@@ -751,7 +827,7 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc)
 	}
 
 	prb->ctrl = cpu_to_le16(ctrl);
-	ata_tf_to_fis(&qc->tf, 0, 1, prb->fis);
+	ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, prb->fis);
 
 	if (qc->flags & ATA_QCFLAG_DMAMAP)
 		sil24_fill_sg(qc, sge);
@@ -780,6 +856,65 @@ static void sil24_irq_clear(struct ata_port *ap)
 	/* unused */
 }
 
+static void sil24_pmp_attach(struct ata_port *ap)
+{
+	sil24_config_pmp(ap, 1);
+	sil24_init_port(ap);
+}
+
+static void sil24_pmp_detach(struct ata_port *ap)
+{
+	sil24_init_port(ap);
+	sil24_config_pmp(ap, 0);
+}
+
+static int sil24_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val)
+{
+	struct ata_port *ap = dev->link->ap;
+	struct ata_taskfile tf;
+	int rc;
+
+	sata_pmp_read_init_tf(&tf, dev, pmp, reg);
+	rc = sil24_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0,
+				   SATA_PMP_SCR_TIMEOUT);
+	if (rc == 0) {
+		sil24_read_tf(ap, 0, &tf);
+		*r_val = sata_pmp_read_val(&tf);
+	}
+	return rc;
+}
+
+static int sil24_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val)
+{
+	struct ata_port *ap = dev->link->ap;
+	struct ata_taskfile tf;
+
+	sata_pmp_write_init_tf(&tf, dev, pmp, reg, val);
+	return sil24_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0,
+				     SATA_PMP_SCR_TIMEOUT);
+}
+
+static int sil24_pmp_softreset(struct ata_link *link, unsigned int *class,
+			       unsigned long deadline)
+{
+	return sil24_do_softreset(link, class, link->pmp, deadline);
+}
+
+static int sil24_pmp_hardreset(struct ata_link *link, unsigned int *class,
+			       unsigned long deadline)
+{
+	int rc;
+
+	rc = sil24_init_port(link->ap);
+	if (rc) {
+		ata_link_printk(link, KERN_ERR,
+				"hardreset failed (port not ready)\n");
+		return rc;
+	}
+
+	return sata_pmp_std_hardreset(link, class, deadline);
+}
+
 static void sil24_freeze(struct ata_port *ap)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
@@ -807,8 +942,10 @@ static void sil24_error_intr(struct ata_port *ap)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
 	struct sil24_port_priv *pp = ap->private_data;
-	struct ata_eh_info *ehi = &ap->link.eh_info;
-	int freeze = 0;
+	struct ata_queued_cmd *qc = NULL;
+	struct ata_link *link;
+	struct ata_eh_info *ehi;
+	int abort = 0, freeze = 0;
 	u32 irq_stat;
 
 	/* on error, we need to clear IRQ explicitly */
@@ -816,6 +953,8 @@ static void sil24_error_intr(struct ata_port *ap)
 	writel(irq_stat, port + PORT_IRQ_STAT);
 
 	/* first, analyze and record host port events */
+	link = &ap->link;
+	ehi = &link->eh_info;
 	ata_ehi_clear_desc(ehi);
 
 	ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
@@ -844,8 +983,43 @@ static void sil24_error_intr(struct ata_port *ap)
 	if (irq_stat & PORT_IRQ_ERROR) {
 		struct sil24_cerr_info *ci = NULL;
 		unsigned int err_mask = 0, action = 0;
-		struct ata_queued_cmd *qc;
-		u32 cerr;
+		u32 context, cerr;
+		int pmp;
+
+		abort = 1;
+
+		/* DMA Context Switch Failure in Port Multiplier Mode
+		 * errata.  If we have active commands to 3 or more
+		 * devices, any error condition on active devices can
+		 * corrupt DMA context switching.
+		 */
+		if (ap->nr_active_links >= 3) {
+			ehi->err_mask |= AC_ERR_OTHER;
+			ehi->action |= ATA_EH_HARDRESET;
+			ata_ehi_push_desc(ehi, "PMP DMA CS errata");
+			freeze = 1;
+		}
+
+		/* find out the offending link and qc */
+		if (ap->nr_pmp_links) {
+			context = readl(port + PORT_CONTEXT);
+			pmp = (context >> 5) & 0xf;
+
+			if (pmp < ap->nr_pmp_links) {
+				link = &ap->pmp_link[pmp];
+				ehi = &link->eh_info;
+				qc = ata_qc_from_tag(ap, link->active_tag);
+
+				ata_ehi_clear_desc(ehi);
+				ata_ehi_push_desc(ehi, "irq_stat 0x%08x",
+						  irq_stat);
+			} else {
+				err_mask |= AC_ERR_HSM;
+				action |= ATA_EH_HARDRESET;
+				freeze = 1;
+			}
+		} else
+			qc = ata_qc_from_tag(ap, link->active_tag);
 
 		/* analyze CMD_ERR */
 		cerr = readl(port + PORT_CMD_ERR);
@@ -864,7 +1038,6 @@ static void sil24_error_intr(struct ata_port *ap)
 		}
 
 		/* record error info */
-		qc = ata_qc_from_tag(ap, ap->link.active_tag);
 		if (qc) {
 			sil24_read_tf(ap, qc->tag, &pp->tf);
 			qc->err_mask |= err_mask;
@@ -872,13 +1045,21 @@ static void sil24_error_intr(struct ata_port *ap)
 			ehi->err_mask |= err_mask;
 
 		ehi->action |= action;
+
+		/* if PMP, resume */
+		if (ap->nr_pmp_links)
+			writel(PORT_CS_PMP_RESUME, port + PORT_CTRL_STAT);
 	}
 
 	/* freeze or abort */
 	if (freeze)
 		ata_port_freeze(ap);
-	else
-		ata_port_abort(ap);
+	else if (abort) {
+		if (qc)
+			ata_link_abort(qc->dev->link);
+		else
+			ata_port_abort(ap);
+	}
 }
 
 static void sil24_finish_qc(struct ata_queued_cmd *qc)
@@ -971,16 +1152,14 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
 
 static void sil24_error_handler(struct ata_port *ap)
 {
-	struct ata_eh_context *ehc = &ap->link.eh_context;
-
-	if (sil24_init_port(ap)) {
+	if (sil24_init_port(ap))
 		ata_eh_freeze_port(ap);
-		ehc->i.action |= ATA_EH_HARDRESET;
-	}
 
 	/* perform recovery */
-	ata_do_eh(ap, ata_std_prereset, sil24_softreset, sil24_hardreset,
-		  ata_std_postreset);
+	sata_pmp_do_eh(ap, ata_std_prereset, sil24_softreset, sil24_hardreset,
+		       ata_std_postreset, sata_pmp_std_prereset,
+		       sil24_pmp_softreset, sil24_pmp_hardreset,
+		       sata_pmp_std_postreset);
 }
 
 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc)
@@ -988,8 +1167,8 @@ static void sil24_post_internal_cmd(struct ata_queued_cmd *qc)
 	struct ata_port *ap = qc->ap;
 
 	/* make DMA engine forget about the failed command */
-	if (qc->flags & ATA_QCFLAG_FAILED)
-		sil24_init_port(ap);
+	if ((qc->flags & ATA_QCFLAG_FAILED) && sil24_init_port(ap))
+		ata_eh_freeze_port(ap);
 }
 
 static int sil24_port_start(struct ata_port *ap)
@@ -1190,6 +1369,12 @@ static int sil24_pci_device_resume(struct pci_dev *pdev)
 
 	return 0;
 }
+
+static int sil24_port_resume(struct ata_port *ap)
+{
+	sil24_config_pmp(ap, ap->nr_pmp_links);
+	return 0;
+}
 #endif
 
 static int __init sil24_init(void)
-- 
cgit v1.2.3-70-g09d2


From 238180343eff95697ed71eea137cf61ba3cea6ad Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:54 +0900
Subject: sata_sil24: implement PORT_RST

As DEV_RST (hardreset) sometimes fail to recover the controller
(especially after PMP DMA CS errata).  In such cases, perform PORT_RST
prior to DEV_RST.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/sata_sil24.c | 93 ++++++++++++++++++++++++++++++++++++------------
 1 file changed, 70 insertions(+), 23 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 03bfbb65c53..15b9a80a178 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -323,6 +323,7 @@ struct sil24_port_priv {
 	union sil24_cmd_block *cmd_block;	/* 32 cmd blocks */
 	dma_addr_t cmd_block_dma;		/* DMA base addr for them */
 	struct ata_taskfile tf;			/* Cached taskfile registers */
+	int do_port_rst;
 };
 
 static void sil24_dev_config(struct ata_device *dev);
@@ -536,6 +537,31 @@ static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
 	*tf = pp->tf;
 }
 
+static void sil24_config_port(struct ata_port *ap)
+{
+	void __iomem *port = ap->ioaddr.cmd_addr;
+
+	/* configure IRQ WoC */
+	if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
+		writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT);
+	else
+		writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
+
+	/* zero error counters. */
+	writel(0x8000, port + PORT_DECODE_ERR_THRESH);
+	writel(0x8000, port + PORT_CRC_ERR_THRESH);
+	writel(0x8000, port + PORT_HSHK_ERR_THRESH);
+	writel(0x0000, port + PORT_DECODE_ERR_CNT);
+	writel(0x0000, port + PORT_CRC_ERR_CNT);
+	writel(0x0000, port + PORT_HSHK_ERR_CNT);
+
+	/* always use 64bit activation */
+	writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR);
+
+	/* clear port multiplier enable and resume bits */
+	writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME, port + PORT_CTRL_CLR);
+}
+
 static void sil24_config_pmp(struct ata_port *ap, int attached)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
@@ -564,6 +590,7 @@ static void sil24_clear_pmp(struct ata_port *ap)
 static int sil24_init_port(struct ata_port *ap)
 {
 	void __iomem *port = ap->ioaddr.cmd_addr;
+	struct sil24_port_priv *pp = ap->private_data;
 	u32 tmp;
 
 	/* clear PMP error status */
@@ -576,8 +603,12 @@ static int sil24_init_port(struct ata_port *ap)
 	tmp = ata_wait_register(port + PORT_CTRL_STAT,
 				PORT_CS_RDY, 0, 10, 100);
 
-	if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY)
+	if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) {
+		pp->do_port_rst = 1;
+		ap->link.eh_context.i.action |= ATA_EH_HARDRESET;
 		return -EIO;
+	}
+
 	return 0;
 }
 
@@ -692,10 +723,34 @@ static int sil24_hardreset(struct ata_link *link, unsigned int *class,
 {
 	struct ata_port *ap = link->ap;
 	void __iomem *port = ap->ioaddr.cmd_addr;
+	struct sil24_port_priv *pp = ap->private_data;
+	int did_port_rst = 0;
 	const char *reason;
 	int tout_msec, rc;
 	u32 tmp;
 
+ retry:
+	/* Sometimes, DEV_RST is not enough to recover the controller.
+	 * This happens often after PM DMA CS errata.
+	 */
+	if (pp->do_port_rst) {
+		ata_port_printk(ap, KERN_WARNING, "controller in dubious "
+				"state, performing PORT_RST\n");
+
+		writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT);
+		msleep(10);
+		writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
+		ata_wait_register(port + PORT_CTRL_STAT, PORT_CS_RDY, 0,
+				  10, 5000);
+
+		/* restore port configuration */
+		sil24_config_port(ap);
+		sil24_config_pmp(ap, ap->nr_pmp_links);
+
+		pp->do_port_rst = 0;
+		did_port_rst = 1;
+	}
+
 	/* sil24 does the right thing(tm) without any protection */
 	sata_set_spd(link);
 
@@ -732,6 +787,11 @@ static int sil24_hardreset(struct ata_link *link, unsigned int *class,
 	return -EAGAIN;
 
  err:
+	if (!did_port_rst) {
+		pp->do_port_rst = 1;
+		goto retry;
+	}
+
 	ata_link_printk(link, KERN_ERR, "hardreset failed (%s)\n", reason);
 	return -EIO;
 }
@@ -997,6 +1057,7 @@ static void sil24_error_intr(struct ata_port *ap)
 			ehi->err_mask |= AC_ERR_OTHER;
 			ehi->action |= ATA_EH_HARDRESET;
 			ata_ehi_push_desc(ehi, "PMP DMA CS errata");
+			pp->do_port_rst = 1;
 			freeze = 1;
 		}
 
@@ -1152,6 +1213,8 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
 
 static void sil24_error_handler(struct ata_port *ap)
 {
+	struct sil24_port_priv *pp = ap->private_data;
+
 	if (sil24_init_port(ap))
 		ata_eh_freeze_port(ap);
 
@@ -1160,6 +1223,8 @@ static void sil24_error_handler(struct ata_port *ap)
 		       ata_std_postreset, sata_pmp_std_prereset,
 		       sil24_pmp_softreset, sil24_pmp_hardreset,
 		       sata_pmp_std_postreset);
+
+	pp->do_port_rst = 0;
 }
 
 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc)
@@ -1206,7 +1271,6 @@ static int sil24_port_start(struct ata_port *ap)
 static void sil24_init_controller(struct ata_host *host)
 {
 	void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
-	void __iomem *port_base = host->iomap[SIL24_PORT_BAR];
 	u32 tmp;
 	int i;
 
@@ -1218,7 +1282,8 @@ static void sil24_init_controller(struct ata_host *host)
 
 	/* init ports */
 	for (i = 0; i < host->n_ports; i++) {
-		void __iomem *port = port_base + i * PORT_REGS_SIZE;
+		struct ata_port *ap = host->ports[i];
+		void __iomem *port = ap->ioaddr.cmd_addr;
 
 		/* Initial PHY setting */
 		writel(0x20c, port + PORT_PHY_CFG);
@@ -1235,26 +1300,8 @@ static void sil24_init_controller(struct ata_host *host)
 				           "failed to clear port RST\n");
 		}
 
-		/* Configure IRQ WoC */
-		if (host->ports[0]->flags & SIL24_FLAG_PCIX_IRQ_WOC)
-			writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT);
-		else
-			writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
-
-		/* Zero error counters. */
-		writel(0x8000, port + PORT_DECODE_ERR_THRESH);
-		writel(0x8000, port + PORT_CRC_ERR_THRESH);
-		writel(0x8000, port + PORT_HSHK_ERR_THRESH);
-		writel(0x0000, port + PORT_DECODE_ERR_CNT);
-		writel(0x0000, port + PORT_CRC_ERR_CNT);
-		writel(0x0000, port + PORT_HSHK_ERR_CNT);
-
-		/* Always use 64bit activation */
-		writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR);
-
-		/* Clear port multiplier enable and resume bits */
-		writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME,
-		       port + PORT_CTRL_CLR);
+		/* configure port */
+		sil24_config_port(ap);
 	}
 
 	/* Turn on interrupts */
-- 
cgit v1.2.3-70-g09d2


From 7d50b60b5e38f910ad69f0187af00f5d6a8970d4 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:54 +0900
Subject: ahci: implement PMP support

Implement AHCI PMP support.  ahci only supports command based
switching.  Also, for some reason, NCQ over PMP doesn't work now.
Other than that, everything works.

Tested on ICH9R, JMB360/363 + SIMG3726, 4726 and 5744.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Forrest Zhao <forrest.zhao@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 220 ++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 174 insertions(+), 46 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index b615390b6b8..b697da483b7 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -46,7 +46,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"ahci"
-#define DRV_VERSION	"2.3"
+#define DRV_VERSION	"3.0"
 
 
 enum {
@@ -96,6 +96,7 @@ enum {
 
 	/* HOST_CAP bits */
 	HOST_CAP_SSC		= (1 << 14), /* Slumber capable */
+	HOST_CAP_PMP		= (1 << 17), /* Port Multiplier support */
 	HOST_CAP_CLO		= (1 << 24), /* Command List Override support */
 	HOST_CAP_SSS		= (1 << 27), /* Staggered Spin-up */
 	HOST_CAP_SNTF		= (1 << 29), /* SNotification register */
@@ -143,7 +144,8 @@ enum {
 				  PORT_IRQ_IF_ERR |
 				  PORT_IRQ_CONNECT |
 				  PORT_IRQ_PHYRDY |
-				  PORT_IRQ_UNK_FIS,
+				  PORT_IRQ_UNK_FIS |
+				  PORT_IRQ_BAD_PMP,
 	PORT_IRQ_ERROR		= PORT_IRQ_FREEZE |
 				  PORT_IRQ_TF_ERR |
 				  PORT_IRQ_HBUS_DATA_ERR,
@@ -153,6 +155,7 @@ enum {
 
 	/* PORT_CMD bits */
 	PORT_CMD_ATAPI		= (1 << 24), /* Device is ATAPI */
+	PORT_CMD_PMP		= (1 << 17), /* PMP attached */
 	PORT_CMD_LIST_ON	= (1 << 15), /* cmd list DMA engine running */
 	PORT_CMD_FIS_ON		= (1 << 14), /* FIS DMA engine running */
 	PORT_CMD_FIS_RX		= (1 << 4), /* Enable FIS receive DMA engine */
@@ -204,6 +207,7 @@ struct ahci_host_priv {
 };
 
 struct ahci_port_priv {
+	struct ata_link		*active_link;
 	struct ahci_cmd_hdr	*cmd_slot;
 	dma_addr_t		cmd_slot_dma;
 	void			*cmd_tbl;
@@ -229,6 +233,10 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc);
 static u8 ahci_check_status(struct ata_port *ap);
 static void ahci_freeze(struct ata_port *ap);
 static void ahci_thaw(struct ata_port *ap);
+static void ahci_pmp_attach(struct ata_port *ap);
+static void ahci_pmp_detach(struct ata_port *ap);
+static int ahci_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val);
+static int ahci_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val);
 static void ahci_error_handler(struct ata_port *ap);
 static void ahci_vt8251_error_handler(struct ata_port *ap);
 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
@@ -268,7 +276,7 @@ static const struct ata_port_operations ahci_ops = {
 
 	.tf_read		= ahci_tf_read,
 
-	.qc_defer		= ata_std_qc_defer,
+	.qc_defer		= sata_pmp_qc_defer_cmd_switch,
 	.qc_prep		= ahci_qc_prep,
 	.qc_issue		= ahci_qc_issue,
 
@@ -283,6 +291,11 @@ static const struct ata_port_operations ahci_ops = {
 	.error_handler		= ahci_error_handler,
 	.post_internal_cmd	= ahci_post_internal_cmd,
 
+	.pmp_attach		= ahci_pmp_attach,
+	.pmp_detach		= ahci_pmp_detach,
+	.pmp_read		= ahci_pmp_read,
+	.pmp_write		= ahci_pmp_write,
+
 #ifdef CONFIG_PM
 	.port_suspend		= ahci_port_suspend,
 	.port_resume		= ahci_port_resume,
@@ -299,7 +312,7 @@ static const struct ata_port_operations ahci_vt8251_ops = {
 
 	.tf_read		= ahci_tf_read,
 
-	.qc_defer		= ata_std_qc_defer,
+	.qc_defer		= sata_pmp_qc_defer_cmd_switch,
 	.qc_prep		= ahci_qc_prep,
 	.qc_issue		= ahci_qc_issue,
 
@@ -314,6 +327,11 @@ static const struct ata_port_operations ahci_vt8251_ops = {
 	.error_handler		= ahci_vt8251_error_handler,
 	.post_internal_cmd	= ahci_post_internal_cmd,
 
+	.pmp_attach		= ahci_pmp_attach,
+	.pmp_detach		= ahci_pmp_detach,
+	.pmp_read		= ahci_pmp_read,
+	.pmp_write		= ahci_pmp_write,
+
 #ifdef CONFIG_PM
 	.port_suspend		= ahci_port_suspend,
 	.port_resume		= ahci_port_resume,
@@ -1114,7 +1132,12 @@ static int ahci_do_softreset(struct ata_link *link, unsigned int *class,
 static int ahci_softreset(struct ata_link *link, unsigned int *class,
 			  unsigned long deadline)
 {
-	return ahci_do_softreset(link, class, 0, deadline);
+	int pmp = 0;
+
+	if (link->ap->flags & ATA_FLAG_PMP)
+		pmp = SATA_PMP_CTRL_PORT;
+
+	return ahci_do_softreset(link, class, pmp, deadline);
 }
 
 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
@@ -1141,7 +1164,7 @@ static int ahci_hardreset(struct ata_link *link, unsigned int *class,
 
 	if (rc == 0 && ata_link_online(link))
 		*class = ahci_dev_classify(ap);
-	if (*class == ATA_DEV_UNKNOWN)
+	if (rc != -EAGAIN && *class == ATA_DEV_UNKNOWN)
 		*class = ATA_DEV_NONE;
 
 	DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
@@ -1196,6 +1219,12 @@ static void ahci_postreset(struct ata_link *link, unsigned int *class)
 	}
 }
 
+static int ahci_pmp_softreset(struct ata_link *link, unsigned int *class,
+			      unsigned long deadline)
+{
+	return ahci_do_softreset(link, class, link->pmp, deadline);
+}
+
 static u8 ahci_check_status(struct ata_port *ap)
 {
 	void __iomem *mmio = ap->ioaddr.cmd_addr;
@@ -1254,7 +1283,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
 	 */
 	cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
 
-	ata_tf_to_fis(&qc->tf, 0, 1, cmd_tbl);
+	ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
 	if (is_atapi) {
 		memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
 		memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
@@ -1267,7 +1296,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
 	/*
 	 * Fill in command slot information.
 	 */
-	opts = cmd_fis_len | n_elem << 16;
+	opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
 	if (qc->tf.flags & ATA_TFLAG_WRITE)
 		opts |= AHCI_CMD_WRITE;
 	if (is_atapi)
@@ -1279,65 +1308,85 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 {
 	struct ahci_port_priv *pp = ap->private_data;
-	struct ata_eh_info *ehi = &ap->link.eh_info;
-	unsigned int err_mask = 0, action = 0;
-	struct ata_queued_cmd *qc;
+	struct ata_eh_info *host_ehi = &ap->link.eh_info;
+	struct ata_link *link = NULL;
+	struct ata_queued_cmd *active_qc;
+	struct ata_eh_info *active_ehi;
 	u32 serror;
 
-	ata_ehi_clear_desc(ehi);
+	/* determine active link */
+	ata_port_for_each_link(link, ap)
+		if (ata_link_active(link))
+			break;
+	if (!link)
+		link = &ap->link;
+
+	active_qc = ata_qc_from_tag(ap, link->active_tag);
+	active_ehi = &link->eh_info;
+
+	/* record irq stat */
+	ata_ehi_clear_desc(host_ehi);
+	ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
 
 	/* AHCI needs SError cleared; otherwise, it might lock up */
 	ahci_scr_read(ap, SCR_ERROR, &serror);
 	ahci_scr_write(ap, SCR_ERROR, serror);
-
-	/* analyze @irq_stat */
-	ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
+	host_ehi->serror |= serror;
 
 	/* some controllers set IRQ_IF_ERR on device errors, ignore it */
 	if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
 		irq_stat &= ~PORT_IRQ_IF_ERR;
 
 	if (irq_stat & PORT_IRQ_TF_ERR) {
-		err_mask |= AC_ERR_DEV;
+		/* If qc is active, charge it; otherwise, the active
+		 * link.  There's no active qc on NCQ errors.  It will
+		 * be determined by EH by reading log page 10h.
+		 */
+		if (active_qc)
+			active_qc->err_mask |= AC_ERR_DEV;
+		else
+			active_ehi->err_mask |= AC_ERR_DEV;
+
 		if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
-			serror &= ~SERR_INTERNAL;
+			host_ehi->serror &= ~SERR_INTERNAL;
+	}
+
+	if (irq_stat & PORT_IRQ_UNK_FIS) {
+		u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
+
+		active_ehi->err_mask |= AC_ERR_HSM;
+		active_ehi->action |= ATA_EH_SOFTRESET;
+		ata_ehi_push_desc(active_ehi,
+				  "unknown FIS %08x %08x %08x %08x" ,
+				  unk[0], unk[1], unk[2], unk[3]);
+	}
+
+	if (ap->nr_pmp_links && (irq_stat & PORT_IRQ_BAD_PMP)) {
+		active_ehi->err_mask |= AC_ERR_HSM;
+		active_ehi->action |= ATA_EH_SOFTRESET;
+		ata_ehi_push_desc(active_ehi, "incorrect PMP");
 	}
 
 	if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
-		err_mask |= AC_ERR_HOST_BUS;
-		action |= ATA_EH_SOFTRESET;
+		host_ehi->err_mask |= AC_ERR_HOST_BUS;
+		host_ehi->action |= ATA_EH_SOFTRESET;
+		ata_ehi_push_desc(host_ehi, "host bus error");
 	}
 
 	if (irq_stat & PORT_IRQ_IF_ERR) {
-		err_mask |= AC_ERR_ATA_BUS;
-		action |= ATA_EH_SOFTRESET;
-		ata_ehi_push_desc(ehi, "interface fatal error");
+		host_ehi->err_mask |= AC_ERR_ATA_BUS;
+		host_ehi->action |= ATA_EH_SOFTRESET;
+		ata_ehi_push_desc(host_ehi, "interface fatal error");
 	}
 
 	if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
-		ata_ehi_hotplugged(ehi);
-		ata_ehi_push_desc(ehi, "%s", irq_stat & PORT_IRQ_CONNECT ?
+		ata_ehi_hotplugged(host_ehi);
+		ata_ehi_push_desc(host_ehi, "%s",
+			irq_stat & PORT_IRQ_CONNECT ?
 			"connection status changed" : "PHY RDY changed");
 	}
 
-	if (irq_stat & PORT_IRQ_UNK_FIS) {
-		u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
-
-		err_mask |= AC_ERR_HSM;
-		action |= ATA_EH_SOFTRESET;
-		ata_ehi_push_desc(ehi, "unknown FIS %08x %08x %08x %08x",
-				  unk[0], unk[1], unk[2], unk[3]);
-	}
-
 	/* okay, let's hand over to EH */
-	ehi->serror |= serror;
-	ehi->action |= action;
-
-	qc = ata_qc_from_tag(ap, ap->link.active_tag);
-	if (qc)
-		qc->err_mask |= err_mask;
-	else
-		ehi->err_mask |= err_mask;
 
 	if (irq_stat & PORT_IRQ_FREEZE)
 		ata_port_freeze(ap);
@@ -1375,7 +1424,8 @@ static void ahci_port_intr(struct ata_port *ap)
 			sata_async_notification(ap);
 	}
 
-	if (ap->link.sactive)
+	/* pp->active_link is valid iff any command is in flight */
+	if (ap->qc_active && pp->active_link->sactive)
 		qc_active = readl(port_mmio + PORT_SCR_ACT);
 	else
 		qc_active = readl(port_mmio + PORT_CMD_ISSUE);
@@ -1513,6 +1563,13 @@ static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 	void __iomem *port_mmio = ahci_port_base(ap);
+	struct ahci_port_priv *pp = ap->private_data;
+
+	/* Keep track of the currently active link.  It will be used
+	 * in completion path to determine whether NCQ phase is in
+	 * progress.
+	 */
+	pp->active_link = qc->dev->link;
 
 	if (qc->tf.protocol == ATA_PROT_NCQ)
 		writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
@@ -1542,8 +1599,11 @@ static void ahci_thaw(struct ata_port *ap)
 	writel(tmp, port_mmio + PORT_IRQ_STAT);
 	writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
 
-	/* turn IRQ back on */
-	writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
+	/* turn IRQ back on, ignore BAD_PMP if PMP isn't attached */
+	tmp = pp->intr_mask;
+	if (!ap->nr_pmp_links)
+		tmp &= ~PORT_IRQ_BAD_PMP;
+	writel(tmp, port_mmio + PORT_IRQ_MASK);
 }
 
 static void ahci_error_handler(struct ata_port *ap)
@@ -1555,8 +1615,10 @@ static void ahci_error_handler(struct ata_port *ap)
 	}
 
 	/* perform recovery */
-	ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
-		  ahci_postreset);
+	sata_pmp_do_eh(ap, ata_std_prereset, ahci_softreset,
+		       ahci_hardreset, ahci_postreset,
+		       sata_pmp_std_prereset, ahci_pmp_softreset,
+		       sata_pmp_std_hardreset, sata_pmp_std_postreset);
 }
 
 static void ahci_vt8251_error_handler(struct ata_port *ap)
@@ -1581,11 +1643,74 @@ static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
 		ahci_kick_engine(ap, 1);
 }
 
+static void ahci_pmp_attach(struct ata_port *ap)
+{
+	void __iomem *port_mmio = ahci_port_base(ap);
+	u32 cmd;
+
+	cmd = readl(port_mmio + PORT_CMD);
+	cmd |= PORT_CMD_PMP;
+	writel(cmd, port_mmio + PORT_CMD);
+}
+
+static void ahci_pmp_detach(struct ata_port *ap)
+{
+	void __iomem *port_mmio = ahci_port_base(ap);
+	struct ahci_host_priv *hpriv = ap->host->private_data;
+	unsigned long flags;
+	u32 cmd;
+
+	cmd = readl(port_mmio + PORT_CMD);
+	cmd &= ~PORT_CMD_PMP;
+	writel(cmd, port_mmio + PORT_CMD);
+
+	if (hpriv->cap & HOST_CAP_NCQ) {
+		spin_lock_irqsave(ap->lock, flags);
+		ap->flags |= ATA_FLAG_NCQ;
+		spin_unlock_irqrestore(ap->lock, flags);
+	}
+}
+
+static int ahci_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val)
+{
+	struct ata_port *ap = dev->link->ap;
+	struct ata_taskfile tf;
+	int rc;
+
+	ahci_kick_engine(ap, 0);
+
+	sata_pmp_read_init_tf(&tf, dev, pmp, reg);
+	rc = ahci_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0,
+				  SATA_PMP_SCR_TIMEOUT);
+	if (rc == 0) {
+		ahci_tf_read(ap, &tf);
+		*r_val = sata_pmp_read_val(&tf);
+	}
+	return rc;
+}
+
+static int ahci_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val)
+{
+	struct ata_port *ap = dev->link->ap;
+	struct ata_taskfile tf;
+
+	ahci_kick_engine(ap, 0);
+
+	sata_pmp_write_init_tf(&tf, dev, pmp, reg, val);
+	return ahci_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0,
+				    SATA_PMP_SCR_TIMEOUT);
+}
+
 static int ahci_port_resume(struct ata_port *ap)
 {
 	ahci_power_up(ap);
 	ahci_start_port(ap);
 
+	if (ap->nr_pmp_links)
+		ahci_pmp_attach(ap);
+	else
+		ahci_pmp_detach(ap);
+
 	return 0;
 }
 
@@ -1866,6 +1991,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (hpriv->cap & HOST_CAP_NCQ)
 		pi.flags |= ATA_FLAG_NCQ;
 
+	if (hpriv->cap & HOST_CAP_PMP)
+		pi.flags |= ATA_FLAG_PMP;
+
 	host = ata_host_alloc_pinfo(&pdev->dev, ppi, fls(hpriv->port_map));
 	if (!host)
 		return -ENOMEM;
-- 
cgit v1.2.3-70-g09d2


From 417a1a6d3d7abad4c5288135f640e6e38e7a65c5 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:55 +0900
Subject: ahci: move host flags over to pi.private_data

Private pi.flags area is full and we need more private flags.  Move
host private flags over to pi.private_data.  During initialization,
these flags are copied to hpriv->flags.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 63 ++++++++++++++++++++++++++++++------------------------
 1 file changed, 35 insertions(+), 28 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index b697da483b7..35ede5c31b9 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -169,14 +169,16 @@ enum {
 	PORT_CMD_ICC_PARTIAL	= (0x2 << 28), /* Put i/f in partial state */
 	PORT_CMD_ICC_SLUMBER	= (0x6 << 28), /* Put i/f in slumber state */
 
+	/* hpriv->flags bits */
+	AHCI_HFLAG_NO_NCQ		= (1 << 0),
+	AHCI_HFLAG_IGN_IRQ_IF_ERR	= (1 << 1), /* ignore IRQ_IF_ERR */
+	AHCI_HFLAG_IGN_SERR_INTERNAL	= (1 << 2), /* ignore SERR_INTERNAL */
+	AHCI_HFLAG_32BIT_ONLY		= (1 << 3), /* force 32bit */
+	AHCI_HFLAG_MV_PATA		= (1 << 4), /* PATA port */
+	AHCI_HFLAG_NO_MSI		= (1 << 5), /* no PCI MSI */
+
 	/* ap->flags bits */
-	AHCI_FLAG_NO_NCQ		= (1 << 24),
-	AHCI_FLAG_IGN_IRQ_IF_ERR	= (1 << 25), /* ignore IRQ_IF_ERR */
-	AHCI_FLAG_IGN_SERR_INTERNAL	= (1 << 27), /* ignore SERR_INTERNAL */
-	AHCI_FLAG_32BIT_ONLY		= (1 << 28), /* force 32bit */
-	AHCI_FLAG_MV_PATA		= (1 << 29), /* PATA port */
-	AHCI_FLAG_NO_MSI		= (1 << 30), /* no PCI MSI */
-	AHCI_FLAG_NO_HOTPLUG		= (1 << 31), /* ignore PxSERR.DIAG.N */
+	AHCI_FLAG_NO_HOTPLUG		= (1 << 24), /* ignore PxSERR.DIAG.N */
 
 	AHCI_FLAG_COMMON		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 					  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
@@ -200,6 +202,7 @@ struct ahci_sg {
 };
 
 struct ahci_host_priv {
+	unsigned int		flags;		/* AHCI_HFLAG_* */
 	u32			cap;		/* cap to use */
 	u32			port_map;	/* port map to use */
 	u32			saved_cap;	/* saved initial cap */
@@ -341,6 +344,8 @@ static const struct ata_port_operations ahci_vt8251_ops = {
 	.port_stop		= ahci_port_stop,
 };
 
+#define AHCI_HFLAGS(flags)	.private_data	= (void *)(flags)
+
 static const struct ata_port_info ahci_port_info[] = {
 	/* board_ahci */
 	{
@@ -352,7 +357,8 @@ static const struct ata_port_info ahci_port_info[] = {
 	},
 	/* board_ahci_vt8251 */
 	{
-		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_NO_NCQ,
+		AHCI_HFLAGS	(AHCI_HFLAG_NO_NCQ),
+		.flags		= AHCI_FLAG_COMMON,
 		.link_flags	= AHCI_LFLAG_COMMON | ATA_LFLAG_HRST_TO_RESUME,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
@@ -360,7 +366,8 @@ static const struct ata_port_info ahci_port_info[] = {
 	},
 	/* board_ahci_ign_iferr */
 	{
-		.flags		= AHCI_FLAG_COMMON | AHCI_FLAG_IGN_IRQ_IF_ERR,
+		AHCI_HFLAGS	(AHCI_HFLAG_IGN_IRQ_IF_ERR),
+		.flags		= AHCI_FLAG_COMMON,
 		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
@@ -368,9 +375,9 @@ static const struct ata_port_info ahci_port_info[] = {
 	},
 	/* board_ahci_sb600 */
 	{
-		.flags		= AHCI_FLAG_COMMON |
-				  AHCI_FLAG_IGN_SERR_INTERNAL |
-				  AHCI_FLAG_32BIT_ONLY,
+		AHCI_HFLAGS	(AHCI_HFLAG_IGN_SERR_INTERNAL |
+				 AHCI_HFLAG_32BIT_ONLY),
+		.flags		= AHCI_FLAG_COMMON,
 		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
@@ -378,11 +385,10 @@ static const struct ata_port_info ahci_port_info[] = {
 	},
 	/* board_ahci_mv */
 	{
-		.sht		= &ahci_sht,
+		AHCI_HFLAGS	(AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_MSI |
+				 AHCI_HFLAG_MV_PATA),
 		.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-				  AHCI_FLAG_NO_NCQ | AHCI_FLAG_NO_MSI |
-				  AHCI_FLAG_MV_PATA,
+				  ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
 		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.udma_mask	= ATA_UDMA6,
@@ -534,7 +540,6 @@ static inline void __iomem *ahci_port_base(struct ata_port *ap)
 /**
  *	ahci_save_initial_config - Save and fixup initial config values
  *	@pdev: target PCI device
- *	@pi: associated ATA port info
  *	@hpriv: host private area to store config values
  *
  *	Some registers containing configuration info might be setup by
@@ -548,7 +553,6 @@ static inline void __iomem *ahci_port_base(struct ata_port *ap)
  *	None.
  */
 static void ahci_save_initial_config(struct pci_dev *pdev,
-				     const struct ata_port_info *pi,
 				     struct ahci_host_priv *hpriv)
 {
 	void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
@@ -562,13 +566,13 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
 	hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
 
 	/* some chips have errata preventing 64bit use */
-	if ((cap & HOST_CAP_64) && (pi->flags & AHCI_FLAG_32BIT_ONLY)) {
+	if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
 		dev_printk(KERN_INFO, &pdev->dev,
 			   "controller can't do 64bit DMA, forcing 32bit\n");
 		cap &= ~HOST_CAP_64;
 	}
 
-	if ((cap & HOST_CAP_NCQ) && (pi->flags & AHCI_FLAG_NO_NCQ)) {
+	if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
 		dev_printk(KERN_INFO, &pdev->dev,
 			   "controller can't do NCQ, turning off CAP_NCQ\n");
 		cap &= ~HOST_CAP_NCQ;
@@ -579,7 +583,7 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
 	 * is asserted through the standard AHCI port
 	 * presence register, as bit 4 (counting from 0)
 	 */
-	if (pi->flags & AHCI_FLAG_MV_PATA) {
+	if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
 		dev_printk(KERN_ERR, &pdev->dev,
 			   "MV_AHCI HACK: port_map %x -> %x\n",
 			   hpriv->port_map,
@@ -919,13 +923,14 @@ static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
 
 static void ahci_init_controller(struct ata_host *host)
 {
+	struct ahci_host_priv *hpriv = host->private_data;
 	struct pci_dev *pdev = to_pci_dev(host->dev);
 	void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
 	int i;
 	void __iomem *port_mmio;
 	u32 tmp;
 
-	if (host->ports[0]->flags & AHCI_FLAG_MV_PATA) {
+	if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
 		port_mmio = __ahci_port_base(host, 4);
 
 		writel(0, port_mmio + PORT_IRQ_MASK);
@@ -1307,6 +1312,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
 
 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 {
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	struct ahci_port_priv *pp = ap->private_data;
 	struct ata_eh_info *host_ehi = &ap->link.eh_info;
 	struct ata_link *link = NULL;
@@ -1334,7 +1340,7 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 	host_ehi->serror |= serror;
 
 	/* some controllers set IRQ_IF_ERR on device errors, ignore it */
-	if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
+	if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
 		irq_stat &= ~PORT_IRQ_IF_ERR;
 
 	if (irq_stat & PORT_IRQ_TF_ERR) {
@@ -1347,7 +1353,7 @@ static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
 		else
 			active_ehi->err_mask |= AC_ERR_DEV;
 
-		if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
+		if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
 			host_ehi->serror &= ~SERR_INTERNAL;
 	}
 
@@ -1977,15 +1983,16 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (rc)
 		return rc;
 
-	if ((pi.flags & AHCI_FLAG_NO_MSI) || pci_enable_msi(pdev))
-		pci_intx(pdev, 1);
-
 	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
 	if (!hpriv)
 		return -ENOMEM;
+	hpriv->flags |= (unsigned long)pi.private_data;
+
+	if ((hpriv->flags & AHCI_HFLAG_NO_MSI) || pci_enable_msi(pdev))
+		pci_intx(pdev, 1);
 
 	/* save initial config */
-	ahci_save_initial_config(pdev, &pi, hpriv);
+	ahci_save_initial_config(pdev, hpriv);
 
 	/* prepare host */
 	if (hpriv->cap & HOST_CAP_NCQ)
-- 
cgit v1.2.3-70-g09d2


From 6949b9148d3656afc13a2ccc06d13c071ec71bdc Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 23 Sep 2007 13:19:55 +0900
Subject: ahci: implement AHCI_HFLAG_NO_PMP

Of course some controllers lie about PMP support.  Black list them.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 35ede5c31b9..af7bf267908 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -176,6 +176,7 @@ enum {
 	AHCI_HFLAG_32BIT_ONLY		= (1 << 3), /* force 32bit */
 	AHCI_HFLAG_MV_PATA		= (1 << 4), /* PATA port */
 	AHCI_HFLAG_NO_MSI		= (1 << 5), /* no PCI MSI */
+	AHCI_HFLAG_NO_PMP		= (1 << 6), /* no PMP */
 
 	/* ap->flags bits */
 	AHCI_FLAG_NO_HOTPLUG		= (1 << 24), /* ignore PxSERR.DIAG.N */
@@ -357,7 +358,7 @@ static const struct ata_port_info ahci_port_info[] = {
 	},
 	/* board_ahci_vt8251 */
 	{
-		AHCI_HFLAGS	(AHCI_HFLAG_NO_NCQ),
+		AHCI_HFLAGS	(AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_PMP),
 		.flags		= AHCI_FLAG_COMMON,
 		.link_flags	= AHCI_LFLAG_COMMON | ATA_LFLAG_HRST_TO_RESUME,
 		.pio_mask	= 0x1f, /* pio0-4 */
@@ -376,7 +377,7 @@ static const struct ata_port_info ahci_port_info[] = {
 	/* board_ahci_sb600 */
 	{
 		AHCI_HFLAGS	(AHCI_HFLAG_IGN_SERR_INTERNAL |
-				 AHCI_HFLAG_32BIT_ONLY),
+				 AHCI_HFLAG_32BIT_ONLY | AHCI_HFLAG_NO_PMP),
 		.flags		= AHCI_FLAG_COMMON,
 		.link_flags	= AHCI_LFLAG_COMMON,
 		.pio_mask	= 0x1f, /* pio0-4 */
@@ -578,6 +579,12 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
 		cap &= ~HOST_CAP_NCQ;
 	}
 
+	if ((cap && HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
+		dev_printk(KERN_INFO, &pdev->dev,
+			   "controller can't do PMP, turning off CAP_PMP\n");
+		cap &= ~HOST_CAP_PMP;
+	}
+
 	/*
 	 * Temporary Marvell 6145 hack: PATA port presence
 	 * is asserted through the standard AHCI port
-- 
cgit v1.2.3-70-g09d2


From 1333e19434da116bc832e1b8925359d1565fedc9 Mon Sep 17 00:00:00 2001
From: Robert Hancock <hancockr@shaw.ca>
Date: Tue, 2 Oct 2007 11:22:02 -0400
Subject: libata: add human-readable error value decoding

This adds human-readable decoding of the ATA status and error registers
(similar to what drivers/ide does) as well as the SATA Serror register
to libata error handling output.  This prevents the need to pore
through standards documents to figure out the meaning of the bits
in these registers when looking at error reports.  Some bits that
drivers/ide decoded are not decoded here, since the bits are either
command-dependent or obsolete, and properly parsing them would add
too much complexity.

Signed-off-by: Robert Hancock <hancockr@shaw.ca>

[edited slightly to make output a bit more symmetric]
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 include/linux/ata.h     |  9 +++++++++
 2 files changed, 54 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 5f2c0f376f7..0bd3898793a 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1911,6 +1911,27 @@ static void ata_eh_link_report(struct ata_link *link)
 			ata_link_printk(link, KERN_ERR, "%s\n", desc);
 	}
 
+	if (ehc->i.serror)
+		ata_port_printk(ap, KERN_ERR,
+		  "SError: { %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s}\n",
+		  ehc->i.serror & SERR_DATA_RECOVERED ? "RecovData " : "",
+		  ehc->i.serror & SERR_COMM_RECOVERED ? "RecovComm " : "",
+		  ehc->i.serror & SERR_DATA ? "UnrecovData " : "",
+		  ehc->i.serror & SERR_PERSISTENT ? "Persist " : "",
+		  ehc->i.serror & SERR_PROTOCOL ? "Proto " : "",
+		  ehc->i.serror & SERR_INTERNAL ? "HostInt " : "",
+		  ehc->i.serror & SERR_PHYRDY_CHG ? "PHYRdyChg " : "",
+		  ehc->i.serror & SERR_PHY_INT_ERR ? "PHYInt " : "",
+		  ehc->i.serror & SERR_COMM_WAKE ? "CommWake " : "",
+		  ehc->i.serror & SERR_10B_8B_ERR ? "10B8B " : "",
+		  ehc->i.serror & SERR_DISPARITY ? "Dispar " : "",
+		  ehc->i.serror & SERR_CRC ? "BadCRC " : "",
+		  ehc->i.serror & SERR_HANDSHAKE ? "Handshk " : "",
+		  ehc->i.serror & SERR_LINK_SEQ_ERR ? "LinkSeq " : "",
+		  ehc->i.serror & SERR_TRANS_ST_ERROR ? "TrStaTrns " : "",
+		  ehc->i.serror & SERR_UNRECOG_FIS ? "UnrecFIS " : "",
+		  ehc->i.serror & SERR_DEV_XCHG ? "DevExch " : "" );
+
 	for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
 		static const char *dma_str[] = {
 			[DMA_BIDIRECTIONAL]	= "bidi",
@@ -1942,6 +1963,30 @@ static void ata_eh_link_report(struct ata_link *link)
 			res->hob_lbal, res->hob_lbam, res->hob_lbah,
 			res->device, qc->err_mask, ata_err_string(qc->err_mask),
 			qc->err_mask & AC_ERR_NCQ ? " <F>" : "");
+
+		if (res->command & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ |
+				    ATA_ERR) ) {
+			if (res->command & ATA_BUSY)
+				ata_dev_printk(qc->dev, KERN_ERR,
+				  "status: { Busy }\n" );
+			else
+				ata_dev_printk(qc->dev, KERN_ERR,
+				  "status: { %s%s%s%s}\n",
+				  res->command & ATA_DRDY ? "DRDY " : "",
+				  res->command & ATA_DF ? "DF " : "",
+				  res->command & ATA_DRQ ? "DRQ " : "",
+				  res->command & ATA_ERR ? "ERR " : "" );
+		}
+
+		if (cmd->command != ATA_CMD_PACKET &&
+		    (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF |
+				     ATA_ABORTED)))
+			ata_dev_printk(qc->dev, KERN_ERR,
+			  "error: { %s%s%s%s}\n",
+			  res->feature & ATA_ICRC ? "ICRC " : "",
+			  res->feature & ATA_UNC ? "UNC " : "",
+			  res->feature & ATA_IDNF ? "IDNF " : "",
+			  res->feature & ATA_ABORTED ? "ABRT " : "" );
 	}
 }
 
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 21f00a0646d..a4f373f8b79 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -287,6 +287,15 @@ enum {
 	SERR_PROTOCOL		= (1 << 10), /* protocol violation */
 	SERR_INTERNAL		= (1 << 11), /* host internal error */
 	SERR_PHYRDY_CHG		= (1 << 16), /* PHY RDY changed */
+	SERR_PHY_INT_ERR	= (1 << 17), /* PHY internal error */
+	SERR_COMM_WAKE		= (1 << 18), /* Comm wake */
+	SERR_10B_8B_ERR		= (1 << 19), /* 10b to 8b decode error */
+	SERR_DISPARITY		= (1 << 20), /* Disparity */
+	SERR_CRC		= (1 << 21), /* CRC error */
+	SERR_HANDSHAKE		= (1 << 22), /* Handshake error */
+	SERR_LINK_SEQ_ERR	= (1 << 23), /* Link sequence error */
+	SERR_TRANS_ST_ERROR	= (1 << 24), /* Transport state trans. error */
+	SERR_UNRECOG_FIS	= (1 << 25), /* Unrecognized FIS */
 	SERR_DEV_XCHG		= (1 << 26), /* device exchanged */
 
 	/* struct ata_taskfile flags */
-- 
cgit v1.2.3-70-g09d2


From 7100819f5f9b99eb7c7dd5597f293388a405bf7b Mon Sep 17 00:00:00 2001
From: Peer Chen <peerchen@gmail.com>
Date: Mon, 24 Sep 2007 10:16:25 +0800
Subject: ahci: Add MCP79 support to AHCI driver

Signed-off-by: Peer Chen <peerchen@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index af7bf267908..24fb90f58cd 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -491,6 +491,14 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 	{ PCI_VDEVICE(NVIDIA, 0x0ad9), board_ahci },		/* MCP77 */
 	{ PCI_VDEVICE(NVIDIA, 0x0ada), board_ahci },		/* MCP77 */
 	{ PCI_VDEVICE(NVIDIA, 0x0adb), board_ahci },		/* MCP77 */
+	{ PCI_VDEVICE(NVIDIA, 0x0ab8), board_ahci },		/* MCP79 */
+	{ PCI_VDEVICE(NVIDIA, 0x0ab9), board_ahci },		/* MCP79 */
+	{ PCI_VDEVICE(NVIDIA, 0x0aba), board_ahci },		/* MCP79 */
+	{ PCI_VDEVICE(NVIDIA, 0x0abb), board_ahci },		/* MCP79 */
+	{ PCI_VDEVICE(NVIDIA, 0x0abc), board_ahci },		/* MCP79 */
+	{ PCI_VDEVICE(NVIDIA, 0x0abd), board_ahci },		/* MCP79 */
+	{ PCI_VDEVICE(NVIDIA, 0x0abe), board_ahci },		/* MCP79 */
+	{ PCI_VDEVICE(NVIDIA, 0x0abf), board_ahci },		/* MCP79 */
 
 	/* SiS */
 	{ PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
-- 
cgit v1.2.3-70-g09d2


From b3a706014e56b1356e7b275fd25b833c63175bf0 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@redhat.com>
Date: Tue, 2 Oct 2007 12:38:26 -0400
Subject: libata: Add a drivers/ide style DMA disable

This is useful when debugging, handling problem systems, or for
distributions just to get the system installed so it can be sorted
out later.

This is a bit smarter than the old IDE one and lets you do

libata.dma=0	Disable all PATA DMA like old IDE
libata.dma=1	Disk DMA only
libata.dma=2	ATAPI DMA only
libata.dma=4	CF DMA only

(or combinations thereof - 0,1,3 being the useful ones I suspect)

(I've split CF as it seems to be a seperate case of pain and suffering
different to the others and caused by assorted PIO wired adapters etc)

Signed-off-by: Alan Cox <alan@redhat.com>

[edited to work on SATA too, changing name from 'pata_dma' to 'dma']
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
 drivers/ata/libata-core.c | 17 +++++++++++++++++
 include/linux/libata.h    |  6 ++++++
 2 files changed, 23 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 5532a6564d0..1501d63db2c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -97,6 +97,10 @@ static int ata_ignore_hpa = 0;
 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
 
+static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
+module_param_named(dma, libata_dma_mask, int, 0444);
+MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
+
 static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
 module_param(ata_probe_timeout, int, 0444);
 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
@@ -2917,14 +2921,27 @@ int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
 	/* step 1: calculate xfer_mask */
 	ata_link_for_each_dev(dev, link) {
 		unsigned int pio_mask, dma_mask;
+		unsigned int mode_mask;
 
 		if (!ata_dev_enabled(dev))
 			continue;
 
+		mode_mask = ATA_DMA_MASK_ATA;
+		if (dev->class == ATA_DEV_ATAPI)
+			mode_mask = ATA_DMA_MASK_ATAPI;
+		else if (ata_id_is_cfa(dev->id))
+			mode_mask = ATA_DMA_MASK_CFA;
+
 		ata_dev_xfermask(dev);
 
 		pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
 		dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
+
+		if (libata_dma_mask & mode_mask)
+			dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
+		else
+			dma_mask = 0;
+
 		dev->pio_mode = ata_xfer_mask2mode(pio_mask);
 		dev->dma_mode = ata_xfer_mask2mode(dma_mask);
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index ca296a575c4..84dfc23b9d3 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -331,6 +331,12 @@ enum {
 	ATA_HORKAGE_BROKEN_HPA	= (1 << 4),	/* Broken HPA */
 	ATA_HORKAGE_SKIP_PM	= (1 << 5),	/* Skip PM operations */
 	ATA_HORKAGE_HPA_SIZE	= (1 << 6),	/* native size off by one */
+
+	 /* DMA mask for user DMA control: User visible values; DO NOT 
+	    renumber */
+	ATA_DMA_MASK_ATA	= (1 << 0),	/* DMA on ATA Disk */
+	ATA_DMA_MASK_ATAPI	= (1 << 1),	/* DMA on ATAPI */
+	ATA_DMA_MASK_CFA	= (1 << 2),	/* DMA on CF Card */
 };
 
 enum hsm_task_states {
-- 
cgit v1.2.3-70-g09d2


From 237d8440cb2b104a3b97fc971a9bce67960bb616 Mon Sep 17 00:00:00 2001
From: Matthew Garrett <mjg59@srcf.ucam.org>
Date: Wed, 3 Oct 2007 01:24:16 +0100
Subject: libata: Integrate ACPI-based PATA/SATA hotplug - version 5

Modern laptops with hotswap bays still tend to utilise a PATA interface
on a SATA bridge, generally with the host controller in some legacy
emulation mode rather than AHCI. This means that the existing hotplug
code in libata is unable to work. The ACPI specification states that
these devices can send notifications when hotswapped, which avoids the
need to obtain notification from the controller. This patch uses the
existing libata-acpi code and simply registers a notification in order
to trigger a rescan whenever the firmware signals an event.

Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-acpi.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 59 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index a276c06dda9..5ebbf16f3af 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -14,6 +14,7 @@
 #include <linux/acpi.h>
 #include <linux/libata.h>
 #include <linux/pci.h>
+#include <scsi/scsi_device.h>
 #include "libata.h"
 
 #include <acpi/acpi_bus.h>
@@ -95,6 +96,47 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap)
 	}
 }
 
+static void ata_acpi_handle_hotplug (struct ata_port *ap, struct kobject *kobj,
+				     u32 event)
+{
+	char event_string[12];
+	char *envp[] = { event_string, NULL };
+	struct ata_eh_info *ehi = &ap->link.eh_info;
+
+	if (event == 0 || event == 1) {
+	       unsigned long flags;
+	       spin_lock_irqsave(ap->lock, flags);
+	       ata_ehi_clear_desc(ehi);
+	       ata_ehi_push_desc(ehi, "ACPI event");
+	       ata_ehi_hotplugged(ehi);
+	       ata_port_freeze(ap);
+	       spin_unlock_irqrestore(ap->lock, flags);
+	}
+
+	if (kobj) {
+	        sprintf(event_string, "BAY_EVENT=%d", event);
+		kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
+	}
+}
+
+static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data)
+{
+	struct ata_device *dev = data;
+	struct kobject *kobj = NULL;
+
+	if (dev->sdev)
+		kobj = &dev->sdev->sdev_gendev.kobj;
+
+	ata_acpi_handle_hotplug (dev->link->ap, kobj, event);
+}
+
+static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data)
+{
+	struct ata_port *ap = data;
+
+	ata_acpi_handle_hotplug (ap, &ap->dev->kobj, event);
+}
+
 /**
  * ata_acpi_associate - associate ATA host with ACPI objects
  * @host: target ATA host
@@ -110,7 +152,7 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap)
  */
 void ata_acpi_associate(struct ata_host *host)
 {
-	int i;
+	int i, j;
 
 	if (!is_pci_dev(host->dev) || libata_noacpi)
 		return;
@@ -126,6 +168,22 @@ void ata_acpi_associate(struct ata_host *host)
 			ata_acpi_associate_sata_port(ap);
 		else
 			ata_acpi_associate_ide_port(ap);
+
+		if (ap->acpi_handle)
+			acpi_install_notify_handler (ap->acpi_handle,
+						     ACPI_SYSTEM_NOTIFY,
+						     ata_acpi_ap_notify,
+						     ap);
+
+		for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
+			struct ata_device *dev = &ap->link.device[j];
+
+			if (dev->acpi_handle)
+				acpi_install_notify_handler (dev->acpi_handle,
+							     ACPI_SYSTEM_NOTIFY,
+							     ata_acpi_dev_notify,
+							     dev);
+		}
 	}
 }
 
-- 
cgit v1.2.3-70-g09d2


From 681c80b5d96076f447e8101ac4325c82d8dce508 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 3 Oct 2007 13:23:18 +0100
Subject: libata: correct handling of SRST reset sequences

Correct handling of SRST reset sequences.  After an SRST it is undefined
whether the drive has gone back to PIO0.  In order to talk safely we should
talk slowly and carefully until we know.

Thus when we do the reset if the controller has a pio setup method we call it
to flip back to PIO 0 and a known state.  After the reset completes the
identify will then be done at the safe speed and the drive/controller will
pick suitable faster modes and reconfigure the controller to these timings.

As a side effect it means we force the controller to PIO 0 as we bring it up
which fixes funnies on a few systems where the BIOS firmware leaves us in an
interesting choice of modes, or embedded boxes with no firmware which come up
in random states.

For smart controllers there is nothing to do - they know about this
internally.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 1501d63db2c..aecbdad960f 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3209,6 +3209,8 @@ static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
 			     unsigned long deadline)
 {
 	struct ata_ioports *ioaddr = &ap->ioaddr;
+	struct ata_device *dev;
+	int i = 0;
 
 	DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
 
@@ -3219,6 +3221,25 @@ static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
 	udelay(20);	/* FIXME: flush */
 	iowrite8(ap->ctl, ioaddr->ctl_addr);
 
+	/* If we issued an SRST then an ATA drive (not ATAPI)
+	 * may have changed configuration and be in PIO0 timing. If
+	 * we did a hard reset (or are coming from power on) this is
+	 * true for ATA or ATAPI. Until we've set a suitable controller
+	 * mode we should not touch the bus as we may be talking too fast.
+	 */
+
+	ata_link_for_each_dev(dev, &ap->link)
+		dev->pio_mode = XFER_PIO_0;
+
+	/* If the controller has a pio mode setup function then use
+	   it to set the chipset to rights. Don't touch the DMA setup
+	   as that will be dealt with when revalidating */
+	if (ap->ops->set_piomode) {
+		ata_link_for_each_dev(dev, &ap->link)
+			if (devmask & (1 << i++))
+				ap->ops->set_piomode(ap, dev);
+	}
+
 	/* spec mandates ">= 2ms" before checking status.
 	 * We wait 150ms, because that was the magic delay used for
 	 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
-- 
cgit v1.2.3-70-g09d2


From 2db78dd302d26d242d3e8e5c4c5024b6c3ea93c2 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Tue, 2 Oct 2007 13:53:04 -0700
Subject: libata_scsi: Fix ATAPI transfer lengths

Some controller variants snoop the ATAPI length value for Packet
transfers to do state machine and FIFO management. Thus we want to
set it properly, even for cases where it is otherwise meaningless.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-scsi.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index df2e05738f3..ea53e6a570b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2305,8 +2305,8 @@ static void atapi_request_sense(struct ata_queued_cmd *qc)
 		qc->tf.feature |= ATAPI_PKT_DMA;
 	} else {
 		qc->tf.protocol = ATA_PROT_ATAPI;
-		qc->tf.lbam = (8 * 1024) & 0xff;
-		qc->tf.lbah = (8 * 1024) >> 8;
+		qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
+		qc->tf.lbah = 0;
 	}
 	qc->nbytes = SCSI_SENSE_BUFFERSIZE;
 
@@ -2415,6 +2415,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
 	struct ata_device *dev = qc->dev;
 	int using_pio = (dev->flags & ATA_DFLAG_PIO);
 	int nodata = (scmd->sc_data_direction == DMA_NONE);
+	unsigned int nbytes;
 
 	memset(qc->cdb, 0, dev->cdb_len);
 	memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
@@ -2434,14 +2435,20 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
 	if (!using_pio && ata_check_atapi_dma(qc))
 		using_pio = 1;
 
+	/* Some controller variants snoop this value for Packet transfers
+	   to do state machine and FIFO management. Thus we want to set it
+	   properly, and for DMA where it is effectively meaningless */
+	nbytes = min(qc->nbytes, (unsigned int)63 * 1024);
+
+	qc->tf.lbam = (nbytes & 0xFF);
+	qc->tf.lbah = (nbytes >> 8);
+
 	if (using_pio || nodata) {
 		/* no data, or PIO data xfer */
 		if (nodata)
 			qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
 		else
 			qc->tf.protocol = ATA_PROT_ATAPI;
-		qc->tf.lbam = (8 * 1024) & 0xff;
-		qc->tf.lbah = (8 * 1024) >> 8;
 	} else {
 		/* DMA data xfer */
 		qc->tf.protocol = ATA_PROT_ATAPI_DMA;
@@ -2452,6 +2459,9 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
 			qc->tf.feature |= ATAPI_DMADIR;
 	}
 
+
+	/* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
+	   as ATAPI tape drives don't get this right otherwise */
 	return 0;
 }
 
-- 
cgit v1.2.3-70-g09d2


From 6ebe9d8667d3f449350cbc6686cd917ecf1f40dd Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Fri, 5 Oct 2007 16:28:36 -0400
Subject: [libata] Turn on ACPI by default

Let's see what explodes.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
 drivers/ata/libata-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index aecbdad960f..64d2c99d15e 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -105,9 +105,9 @@ static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ;
 module_param(ata_probe_timeout, int, 0444);
 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
 
-int libata_noacpi = 1;
+int libata_noacpi = 0;
 module_param_named(noacpi, libata_noacpi, int, 0444);
-MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set");
+MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
 
 MODULE_AUTHOR("Jeff Garzik");
 MODULE_DESCRIPTION("Library module for ATA devices");
-- 
cgit v1.2.3-70-g09d2


From da6f0ec2d54acf545e784363aa5bad0dafc5ffa8 Mon Sep 17 00:00:00 2001
From: Paolo Ornati <ornati@fastwebnet.it>
Date: Thu, 4 Oct 2007 11:06:56 +0900
Subject: libata: blacklist NCQ on Seagate Barracuda ST380817AS

Seagate Barracuda ST380817AS has troubles with NCQ. For example,
unpacking a tarball on an XFS filesystem gives this:

ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x2 frozen
ata1.00: cmd 61/40:00:29:a3:98/00:00:00:00:00/40 tag 0 cdb 0x0 data 32768 out
         res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)

More info here:
http://lkml.org/lkml/2007/1/21/76

Blacklist it!

Signed-off-by: Paolo Ornati <ornati@fastwebnet.it>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 64d2c99d15e..a169ed9849c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3958,6 +3958,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "Maxtor 7V300F0",	"VA111630",	ATA_HORKAGE_NONCQ },
 	{ "HITACHI HDS7250SASUN500G*", NULL,    ATA_HORKAGE_NONCQ },
 	{ "HITACHI HDS7225SBSUN250G*", NULL,    ATA_HORKAGE_NONCQ },
+	{ "ST380817AS",		"3.42",		ATA_HORKAGE_NONCQ },
 
 	/* Blacklist entries taken from Silicon Image 3124/3132
 	   Windows driver .inf file - also several Linux problem reports */
-- 
cgit v1.2.3-70-g09d2


From 70edb185dbaa8a9ec0d6f3e50bb5698a4e85ded6 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Thu, 4 Oct 2007 17:27:59 +0900
Subject: libata: add HDT722516DLA380 to NCQ blacklist

HDT722516DLA380 does spurious completion of NCQ commands.  Blacklist
it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Frans Pop <elendil@planet.nl>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index a169ed9849c..d71f0d05403 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3968,6 +3968,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	/* Drives which do spurious command completion */
 	{ "HTS541680J9SA00",	"SB2IC7EP",	ATA_HORKAGE_NONCQ, },
 	{ "HTS541612J9SA00",	"SBDIC7JP",	ATA_HORKAGE_NONCQ, },
+	{ "HDT722516DLA380",	"V43OA96A",	ATA_HORKAGE_NONCQ, },
 	{ "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, },
 	{ "WDC WD740ADFD-00NLR1", NULL,		ATA_HORKAGE_NONCQ, },
 	{ "WDC WD3200AAJS-00RYA0", "12.01B01",	ATA_HORKAGE_NONCQ, },
-- 
cgit v1.2.3-70-g09d2


From badff03df7a005d13ea2ae8ddc2f5ec0cfc049e8 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 4 Oct 2007 21:28:18 +0100
Subject: libata-core: Expose gtm methods for driver use

Talk to the dark side our driver has to, yes. Much misleading is the
data. Store it in a structure we do so that it may be parsed.

Signed-off-by: Alan Cox <alan@redhat.com>
--
Whats small, old and shouts phrases out of order across mountains ?
Yodla..
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-acpi.c | 8 ++++++--
 include/linux/libata.h    | 2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 5ebbf16f3af..f862e07d92f 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -200,7 +200,7 @@ void ata_acpi_associate(struct ata_host *host)
  * RETURNS:
  * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
  */
-static int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm)
+int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm)
 {
 	struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
 	union acpi_object *out_obj;
@@ -244,6 +244,8 @@ static int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm)
 	return rc;
 }
 
+EXPORT_SYMBOL_GPL(ata_acpi_gtm);
+
 /**
  * ata_acpi_stm - execute _STM
  * @ap: target ATA port
@@ -257,7 +259,7 @@ static int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm)
  * RETURNS:
  * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
  */
-static int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm)
+int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm)
 {
 	acpi_status status;
 	struct acpi_object_list         input;
@@ -289,6 +291,8 @@ static int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm)
 	return 0;
 }
 
+EXPORT_SYMBOL_GPL(ata_acpi_stm);
+
 /**
  * ata_dev_get_GTF - get the drive bootup default taskfile settings
  * @dev: target ATA device
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 84dfc23b9d3..751aabc21a3 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -929,6 +929,8 @@ enum {
 /* libata-acpi.c */
 #ifdef CONFIG_ATA_ACPI
 extern int ata_acpi_cbl_80wire(struct ata_port *ap);
+int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm);
+int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *stm);
 #else
 static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
 #endif
-- 
cgit v1.2.3-70-g09d2


From 025621f9a7c0efe1139d43d246136a0f3e8ea675 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 4 Oct 2007 21:32:58 +0100
Subject: pata_acpi: ACPI driver support

	On a cable there may be
	eighty wires or perhaps forty
	and we learn about its type
	In the world of ACPI

	So we call the GTM
	And we find the the timing rate
	And we look through it to see
	If eighty wire it must be

	Timing lives in ACPI routines
	ACPI routines, ACPI routines
	Timing lives in ACPI routines
	ACPI routes ACPI routines

	And the drivers last you see
	Picking up unknown pci ids
	and the code begins to work

	Timing lives in ACPI routines
	ACPI routines, ACPI routines
	Timing lives in ACPI routines
	ACPI routes ACPI routines

	[Full speed ahead, Mr Hacker, full speed ahead]
	 Full speed over here sir!
	 Checking Cable, checking cable
	 Aye aye, 80 wire,
	 Heaven heaven]

	If we use ACPI (ACPI)
	Every box (every box) has all we need (has all we need)
	Cable type (cable type) and mode timing (mode timing)
	In our ATA (in our ATA) subroutines (subroutines, ha ha)

	Timing lives in ACPI routines
	ACPI routines, ACPI routines
	Timing lives in ACPI routines
	ACPI routes ACPI routines
	Timing lives in ACPI routines
	ACPI routines, ACPI routines
	Timing lives in ACPI routines
	ACPI routes ACPI routines

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/Kconfig     |   9 ++
 drivers/ata/Makefile    |   2 +
 drivers/ata/pata_acpi.c | 395 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 406 insertions(+)
 create mode 100644 drivers/ata/pata_acpi.c

(limited to 'drivers/ata')

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index cf960bd1c00..4672066167e 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -173,6 +173,15 @@ config SATA_INIC162X
 	help
 	  This option enables support for Initio 162x Serial ATA.
 
+config PATA_ACPI
+	tristate "ACPI firmware driver for PATA"
+	depends on ATA_ACPI
+	help
+	  This option enables an ACPI method driver which drives
+	  motherboard PATA controller interfaces through the ACPI
+	  firmware in the BIOS. This driver can sometimes handle
+	  otherwise unsupported hardware.
+
 config PATA_ALI
 	tristate "ALi PATA support (Experimental)"
 	depends on PCI && EXPERIMENTAL
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 7e937519a93..2a63645003e 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -66,6 +66,8 @@ obj-$(CONFIG_PATA_SCC)		+= pata_scc.o
 obj-$(CONFIG_PATA_BF54X)	+= pata_bf54x.o
 obj-$(CONFIG_PATA_PLATFORM)	+= pata_platform.o
 obj-$(CONFIG_PATA_ICSIDE)	+= pata_icside.o
+# Should be last but two libata driver
+obj-$(CONFIG_PATA_ACPI)		+= pata_acpi.o
 # Should be last but one libata driver
 obj-$(CONFIG_ATA_GENERIC)	+= ata_generic.o
 # Should be last libata driver
diff --git a/drivers/ata/pata_acpi.c b/drivers/ata/pata_acpi.c
new file mode 100644
index 00000000000..5d3920f6fd6
--- /dev/null
+++ b/drivers/ata/pata_acpi.c
@@ -0,0 +1,395 @@
+/*
+ *	ACPI PATA driver
+ *
+ *	(c) 2007 Red Hat  <alan@redhat.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acnames.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acparser.h>
+#include <acpi/acexcep.h>
+#include <acpi/acmacros.h>
+#include <acpi/actypes.h>
+
+#include <linux/libata.h>
+#include <linux/ata.h>
+
+#define DRV_NAME	"pata_acpi"
+#define DRV_VERSION	"0.2.3"
+
+struct pata_acpi {
+	struct ata_acpi_gtm gtm;
+	void *last;
+	unsigned long mask[2];
+};
+
+/**
+ *	pacpi_pre_reset	-	check for 40/80 pin
+ *	@ap: Port
+ *	@deadline: deadline jiffies for the operation
+ *
+ *	Perform the PATA port setup we need.
+ */
+
+static int pacpi_pre_reset(struct ata_link *link, unsigned long deadline)
+{
+	struct ata_port *ap = link->ap;
+	struct pata_acpi *acpi = ap->private_data;
+	if (ap->acpi_handle == NULL || ata_acpi_gtm(ap, &acpi->gtm) < 0)
+		return -ENODEV;
+
+	return ata_std_prereset(link, deadline);
+}
+
+/**
+ *	pacpi_cable_detect	-	cable type detection
+ *	@ap: port to detect
+ *
+ *	Perform device specific cable detection
+ */
+
+static int pacpi_cable_detect(struct ata_port *ap)
+{
+	struct pata_acpi *acpi = ap->private_data;
+
+	if ((acpi->mask[0] | acpi->mask[1]) & (0xF8 << ATA_SHIFT_UDMA))
+		return ATA_CBL_PATA80;
+	else
+		return ATA_CBL_PATA40;
+}
+
+/**
+ *	pacpi_error_handler - Setup and error handler
+ *	@ap: Port to handle
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ */
+
+static void pacpi_error_handler(struct ata_port *ap)
+{
+	return ata_bmdma_drive_eh(ap, pacpi_pre_reset, ata_std_softreset,
+				  NULL, ata_std_postreset);
+}
+
+/* Welcome to ACPI, bring a bucket */
+static const unsigned int pio_cycle[7] = {
+	600, 383, 240, 180, 120, 100, 80
+};
+static const unsigned int mwdma_cycle[5] = {
+	480, 150, 120, 100, 80
+};
+static const unsigned int udma_cycle[7] = {
+	120, 80, 60, 45, 30, 20, 15
+};
+
+/**
+ *	pacpi_discover_modes	-	filter non ACPI modes
+ *	@adev: ATA device
+ *	@mask: proposed modes
+ *
+ *	Try the modes available and see which ones the ACPI method will
+ *	set up sensibly. From this we get a mask of ACPI modes we can use
+ */
+
+static unsigned long pacpi_discover_modes(struct ata_port *ap, struct ata_device *adev)
+{
+	int unit = adev->devno;
+	struct pata_acpi *acpi = ap->private_data;
+	int i;
+	u32 t;
+	unsigned long mask = (0x7f << ATA_SHIFT_UDMA) | (0x7 << ATA_SHIFT_MWDMA) | (0x1F << ATA_SHIFT_PIO);
+
+	struct ata_acpi_gtm probe;
+
+	probe = acpi->gtm;
+
+	/* We always use the 0 slot for crap hardware */
+	if (!(probe.flags & 0x10))
+		unit = 0;
+
+	ata_acpi_gtm(ap, &probe);
+
+	/* Start by scanning for PIO modes */
+	for (i = 0; i < 7; i++) {
+		t = probe.drive[unit].pio;
+		if (t <= pio_cycle[i]) {
+			mask |= (2 << (ATA_SHIFT_PIO + i)) - 1;
+			break;
+		}
+	}
+
+	/* See if we have MWDMA or UDMA data. We don't bother with MWDMA
+	   if UDMA is availabe as this means the BIOS set UDMA and our
+	   error changedown if it works is UDMA to PIO anyway */
+	if (probe.flags & (1 << (2 * unit))) {
+		/* MWDMA */
+		for (i = 0; i < 5; i++) {
+			t = probe.drive[unit].dma;
+			if (t <= mwdma_cycle[i]) {
+				mask |= (2 << (ATA_SHIFT_MWDMA + i)) - 1;
+				break;
+			}
+		}
+	} else {
+		/* UDMA */
+		for (i = 0; i < 7; i++) {
+			t = probe.drive[unit].dma;
+			if (t <= udma_cycle[i]) {
+				mask |= (2 << (ATA_SHIFT_UDMA + i)) - 1;
+				break;
+			}
+		}
+	}
+	if (mask & (0xF8 << ATA_SHIFT_UDMA))
+		ap->cbl = ATA_CBL_PATA80;
+	return mask;
+}
+
+/**
+ *	pacpi_mode_filter	-	mode filter for ACPI
+ *	@adev: device
+ *	@mask: mask of valid modes
+ *
+ *	Filter the valid mode list according to our own specific rules, in
+ *	this case the list of discovered valid modes obtained by ACPI probing
+ */
+
+static unsigned long pacpi_mode_filter(struct ata_device *adev, unsigned long mask)
+{
+	struct pata_acpi *acpi = adev->link->ap->private_data;
+	return ata_pci_default_filter(adev, mask & acpi->mask[adev->devno]);
+}
+
+/**
+ *	pacpi_set_piomode	-	set initial PIO mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ */
+
+static void pacpi_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	int unit = adev->devno;
+	struct pata_acpi *acpi = ap->private_data;
+
+	if(!(acpi->gtm.flags & 0x10))
+		unit = 0;
+
+	/* Now stuff the nS values into the structure */
+	acpi->gtm.drive[unit].pio = pio_cycle[adev->pio_mode - XFER_PIO_0];
+	ata_acpi_stm(ap, &acpi->gtm);
+	/* See what mode we actually got */
+	ata_acpi_gtm(ap, &acpi->gtm);
+}
+
+/**
+ *	pacpi_set_dmamode	-	set initial DMA mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ */
+
+static void pacpi_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	int unit = adev->devno;
+	struct pata_acpi *acpi = ap->private_data;
+
+	if(!(acpi->gtm.flags & 0x10))
+		unit = 0;
+
+	/* Now stuff the nS values into the structure */
+	if (adev->dma_mode >= XFER_UDMA_0) {
+		acpi->gtm.drive[unit].dma = udma_cycle[adev->dma_mode - XFER_UDMA_0];
+		acpi->gtm.flags |= (1 << (2 * unit));
+	} else {
+		acpi->gtm.drive[unit].dma = mwdma_cycle[adev->dma_mode - XFER_MW_DMA_0];
+		acpi->gtm.flags &= ~(1 << (2 * unit));
+	}
+	ata_acpi_stm(ap, &acpi->gtm);
+	/* See what mode we actually got */
+	ata_acpi_gtm(ap, &acpi->gtm);
+}
+
+/**
+ *	pacpi_qc_issue_prot	-	command issue
+ *	@qc: command pending
+ *
+ *	Called when the libata layer is about to issue a command. We wrap
+ *	this interface so that we can load the correct ATA timings if
+ *	neccessary.
+ */
+
+static unsigned int pacpi_qc_issue_prot(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+	struct pata_acpi *acpi = ap->private_data;
+
+	if (acpi->gtm.flags & 0x10)
+		return ata_qc_issue_prot(qc);
+
+	if (adev != acpi->last) {
+		pacpi_set_piomode(ap, adev);
+		if (adev->dma_mode)
+			pacpi_set_dmamode(ap, adev);
+		acpi->last = adev;
+	}
+	return ata_qc_issue_prot(qc);
+}
+
+/**
+ *	pacpi_port_start	-	port setup
+ *	@ap: ATA port being set up
+ *
+ *	Use the port_start hook to maintain private control structures
+ */
+
+static int pacpi_port_start(struct ata_port *ap)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	struct pata_acpi *acpi;
+
+	int ret;
+
+	if (ap->acpi_handle == NULL)
+		return -ENODEV;
+
+	acpi = ap->private_data = devm_kzalloc(&pdev->dev, sizeof(struct pata_acpi), GFP_KERNEL);
+	if (ap->private_data == NULL)
+		return -ENOMEM;
+	acpi->mask[0] = pacpi_discover_modes(ap, &ap->link.device[0]);
+	acpi->mask[1] = pacpi_discover_modes(ap, &ap->link.device[1]);
+	ret = ata_sff_port_start(ap);
+	if (ret < 0)
+		return ret;
+
+	return ret;
+}
+
+static struct scsi_host_template pacpi_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= LIBATA_MAX_PRD,
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
+	.emulated		= ATA_SHT_EMULATED,
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,
+	.proc_name		= DRV_NAME,
+	.dma_boundary		= ATA_DMA_BOUNDARY,
+	.slave_configure	= ata_scsi_slave_config,
+	.slave_destroy		= ata_scsi_slave_destroy,
+	/* Use standard CHS mapping rules */
+	.bios_param		= ata_std_bios_param,
+};
+
+static const struct ata_port_operations pacpi_ops = {
+	.set_piomode		= pacpi_set_piomode,
+	.set_dmamode		= pacpi_set_dmamode,
+	.mode_filter		= pacpi_mode_filter,
+
+	/* Task file is PCI ATA format, use helpers */
+	.tf_load		= ata_tf_load,
+	.tf_read		= ata_tf_read,
+	.check_status		= ata_check_status,
+	.exec_command		= ata_exec_command,
+	.dev_select		= ata_std_dev_select,
+
+	.freeze			= ata_bmdma_freeze,
+	.thaw			= ata_bmdma_thaw,
+	.error_handler		= pacpi_error_handler,
+	.post_internal_cmd	= ata_bmdma_post_internal_cmd,
+	.cable_detect		= pacpi_cable_detect,
+
+	/* BMDMA handling is PCI ATA format, use helpers */
+	.bmdma_setup		= ata_bmdma_setup,
+	.bmdma_start		= ata_bmdma_start,
+	.bmdma_stop		= ata_bmdma_stop,
+	.bmdma_status		= ata_bmdma_status,
+	.qc_prep		= ata_qc_prep,
+	.qc_issue		= pacpi_qc_issue_prot,
+	.data_xfer		= ata_data_xfer,
+
+	/* Timeout handling */
+	.irq_handler		= ata_interrupt,
+	.irq_clear		= ata_bmdma_irq_clear,
+	.irq_on			= ata_irq_on,
+
+	/* Generic PATA PCI ATA helpers */
+	.port_start		= pacpi_port_start,
+};
+
+
+/**
+ *	pacpi_init_one - Register ACPI ATA PCI device with kernel services
+ *	@pdev: PCI device to register
+ *	@ent: Entry in pacpi_pci_tbl matching with @pdev
+ *
+ *	Called from kernel PCI layer.
+ *
+ *	LOCKING:
+ *	Inherited from PCI layer (may sleep).
+ *
+ *	RETURNS:
+ *	Zero on success, or -ERRNO value.
+ */
+
+static int pacpi_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	static const struct ata_port_info info = {
+		.sht		= &pacpi_sht,
+		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+
+		.pio_mask	= 0x1f,
+		.mwdma_mask	= 0x07,
+		.udma_mask 	= 0x7f,
+
+		.port_ops	= &pacpi_ops,
+	};
+	const struct ata_port_info *ppi[] = { &info, NULL };
+	return ata_pci_init_one(pdev, ppi);
+}
+
+static const struct pci_device_id pacpi_pci_tbl[] = {
+	{ PCI_ANY_ID,		PCI_ANY_ID,			   PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
+	{ }	/* terminate list */
+};
+
+static struct pci_driver pacpi_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= pacpi_pci_tbl,
+	.probe			= pacpi_init_one,
+	.remove			= ata_pci_remove_one,
+	.suspend		= ata_pci_device_suspend,
+	.resume			= ata_pci_device_resume,
+};
+
+static int __init pacpi_init(void)
+{
+	return pci_register_driver(&pacpi_pci_driver);
+}
+
+static void __exit pacpi_exit(void)
+{
+	pci_unregister_driver(&pacpi_pci_driver);
+}
+
+module_init(pacpi_init);
+module_exit(pacpi_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("SCSI low-level driver for ATA in ACPI mode");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, pacpi_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
-- 
cgit v1.2.3-70-g09d2


From 954bb005c9d5368188ef03ff1d723ff3c0e8ae99 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 5 Oct 2007 08:54:39 +0900
Subject: libata: add ST9160821AS / 3.ALD to NCQ blacklist

ST9160821AS / 3.ALD also does spurious NCQ completions.  Disable NCQ.

Signed-off-by: Tejun Heo <teheo@suse.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d71f0d05403..519ce586bd1 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3975,6 +3975,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "FUJITSU MHV2080BH",	"00840028",	ATA_HORKAGE_NONCQ, },
 	{ "ST9120822AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
 	{ "ST9160821AS",	"3.CLF",	ATA_HORKAGE_NONCQ, },
+	{ "ST9160821AS",	"3.ALD",	ATA_HORKAGE_NONCQ, },
 	{ "ST3160812AS",	"3.ADJ",	ATA_HORKAGE_NONCQ, },
 	{ "ST980813AS",		"3.ADB",	ATA_HORKAGE_NONCQ, },
 	{ "SAMSUNG HD401LJ",	"ZZ100-15",	ATA_HORKAGE_NONCQ, },
-- 
cgit v1.2.3-70-g09d2


From a01f48b8e7f5ca1000d662fe205e6fe884e0d132 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Sun, 7 Oct 2007 07:04:50 +0900
Subject: pata_jmicron: match vendor and class code only

PATA part of all current JMB controllers behave the same way and
JMicron confirms that all future ones will stay compatible.  Drop
device matching and match only vendor and class.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Ethan Hsiao <ethanhsiao@jmicron.com>
Cc: Justin Tsai <justin@jmicron.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/pata_jmicron.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
index 6d5a81869df..225a7223a72 100644
--- a/drivers/ata/pata_jmicron.c
+++ b/drivers/ata/pata_jmicron.c
@@ -204,17 +204,8 @@ static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *i
 }
 
 static const struct pci_device_id jmicron_pci_tbl[] = {
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361,
-	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 361 },
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363,
-	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 363 },
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365,
-	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 365 },
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366,
-	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 366 },
-	{ PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368,
-	  PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 368 },
-
+	{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+	  PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
 	{ }	/* terminate list */
 };
 
-- 
cgit v1.2.3-70-g09d2


From abf6e8ed07213bdd9734be2e42639b79310bd81c Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 14:57:25 +0900
Subject: libata: clear ehi description after initial host report

ehi description field is used to carry LLD specific controller
description.  Sometimes, it's used without clearing before and LLD
description gets printed with exception information one more time.
Clear after printing.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 519ce586bd1..db760e2dc30 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6773,13 +6773,14 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 		xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
 					      ap->udma_mask);
 
-		if (!ata_port_is_dummy(ap))
+		if (!ata_port_is_dummy(ap)) {
 			ata_port_printk(ap, KERN_INFO,
 					"%cATA max %s %s\n",
 					(ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
 					ata_mode_string(xfer_mask),
 					ap->link.eh_info.desc);
-		else
+			ata_ehi_clear_desc(&ap->link.eh_info);
+		} else
 			ata_port_printk(ap, KERN_INFO, "DUMMY\n");
 	}
 
-- 
cgit v1.2.3-70-g09d2


From 94ff3d54080975686a3c41e73b8926030ee0c31f Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 14:57:56 +0900
Subject: libata: skip suppress reporting if ATA_EHI_QUIET

ATA_EHI_NO_AUTOPSY and ATA_EHI_QUIET are used during initial probing
to skip exception analysis and reporting.  Usually, there's nothing to
report but on some allowed but rare corner cases (e.g. phy status
changed interrupt when IRQ is enabled on frozen port - this happens if
IRQ pending status isn't cleared in the IRQ router or controller)
exception messages get printed.

Skip reporting if ATA_EHI_QUIET is set.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 0bd3898793a..866ac9d5530 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1868,6 +1868,9 @@ static void ata_eh_link_report(struct ata_link *link)
 	char tries_buf[6];
 	int tag, nr_failed = 0;
 
+	if (ehc->i.flags & ATA_EHI_QUIET)
+		return;
+
 	desc = NULL;
 	if (ehc->i.desc[0] != '\0')
 		desc = ehc->i.desc;
-- 
cgit v1.2.3-70-g09d2


From 9073868376ed5fa1f247327ccb2e6f766d5b7eed Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 14:58:33 +0900
Subject: libata: wrap schedule_timeout_uninterruptible() in loop

Tasks in uninterruptible sleep might be woken up by unrelated events
and should check whether the condition it was waiting for has actually
triggered.  Wrap schedule_timeout_uninterruptible() in loop to achieve
it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 866ac9d5530..8aa61403303 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2183,7 +2183,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
 				"(errno=%d), retrying in %u secs\n",
 				rc, (jiffies_to_msecs(delta) + 999) / 1000);
 
-			schedule_timeout_uninterruptible(delta);
+			while (delta)
+				delta = schedule_timeout_uninterruptible(delta);
 		}
 
 		if (rc == -EPIPE ||
-- 
cgit v1.2.3-70-g09d2


From 75da6d2b8f518bec40546bc0b0696a2cebecf6cc Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 14:59:50 +0900
Subject: ahci: kill leftover from enabling NCQ over PMP

ahci had problems with NCQ over PMP and NCQ used to be disabled while
PMP was attached.  After fixing the problem, the temporary NCQ
disabling code wasn't removed completely.  Kill the remaining piece.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 8 --------
 1 file changed, 8 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 24fb90f58cd..694eabcb932 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1677,19 +1677,11 @@ static void ahci_pmp_attach(struct ata_port *ap)
 static void ahci_pmp_detach(struct ata_port *ap)
 {
 	void __iomem *port_mmio = ahci_port_base(ap);
-	struct ahci_host_priv *hpriv = ap->host->private_data;
-	unsigned long flags;
 	u32 cmd;
 
 	cmd = readl(port_mmio + PORT_CMD);
 	cmd &= ~PORT_CMD_PMP;
 	writel(cmd, port_mmio + PORT_CMD);
-
-	if (hpriv->cap & HOST_CAP_NCQ) {
-		spin_lock_irqsave(ap->lock, flags);
-		ap->flags |= ATA_FLAG_NCQ;
-		spin_unlock_irqrestore(ap->lock, flags);
-	}
 }
 
 static int ahci_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val)
-- 
cgit v1.2.3-70-g09d2


From 1c954a4d9a9e351fa3509533fd8dd5f3821206cd Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 15:01:37 +0900
Subject: ahci: clean up PORT_IRQ_BAD_PMP enabling

Now that we have pp->intr_mask, move PORT_IRQ_BAD_PMP enabling to
ahci_pmp_attach/detach() where it belongs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 694eabcb932..6633c7422fc 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1620,11 +1620,8 @@ static void ahci_thaw(struct ata_port *ap)
 	writel(tmp, port_mmio + PORT_IRQ_STAT);
 	writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
 
-	/* turn IRQ back on, ignore BAD_PMP if PMP isn't attached */
-	tmp = pp->intr_mask;
-	if (!ap->nr_pmp_links)
-		tmp &= ~PORT_IRQ_BAD_PMP;
-	writel(tmp, port_mmio + PORT_IRQ_MASK);
+	/* turn IRQ back on */
+	writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
 }
 
 static void ahci_error_handler(struct ata_port *ap)
@@ -1667,21 +1664,29 @@ static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
 static void ahci_pmp_attach(struct ata_port *ap)
 {
 	void __iomem *port_mmio = ahci_port_base(ap);
+	struct ahci_port_priv *pp = ap->private_data;
 	u32 cmd;
 
 	cmd = readl(port_mmio + PORT_CMD);
 	cmd |= PORT_CMD_PMP;
 	writel(cmd, port_mmio + PORT_CMD);
+
+	pp->intr_mask |= PORT_IRQ_BAD_PMP;
+	writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
 }
 
 static void ahci_pmp_detach(struct ata_port *ap)
 {
 	void __iomem *port_mmio = ahci_port_base(ap);
+	struct ahci_port_priv *pp = ap->private_data;
 	u32 cmd;
 
 	cmd = readl(port_mmio + PORT_CMD);
 	cmd &= ~PORT_CMD_PMP;
 	writel(cmd, port_mmio + PORT_CMD);
+
+	pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
+	writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
 }
 
 static int ahci_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val)
-- 
cgit v1.2.3-70-g09d2


From 5f226c6bf78edab023ed1ea679531731d9df92a6 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 15:02:23 +0900
Subject: ahci: fix notification handling

Asynchronous notification on ICH9 didn't work because it didn't write
AN FIS into the RX area - it only updates SNotification.  Also,
snooping SDB_FIS RX area is racy against further SDB FIS receptions.
Let sata_async_notification() determine using SNTF if it's available
and snoop RX area iff SNTF isn't available

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 6633c7422fc..abfb72aae3d 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1420,6 +1420,7 @@ static void ahci_port_intr(struct ata_port *ap)
 	void __iomem *port_mmio = ap->ioaddr.cmd_addr;
 	struct ata_eh_info *ehi = &ap->link.eh_info;
 	struct ahci_port_priv *pp = ap->private_data;
+	struct ahci_host_priv *hpriv = ap->host->private_data;
 	u32 status, qc_active;
 	int rc, known_irq = 0;
 
@@ -1432,17 +1433,28 @@ static void ahci_port_intr(struct ata_port *ap)
 	}
 
 	if (status & PORT_IRQ_SDB_FIS) {
-		/* If the 'N' bit in word 0 of the FIS is set, we just
-		 * received asynchronous notification.  Tell libata
-		 * about it.  Note that as the SDB FIS itself is
-		 * accessible, SNotification can be emulated by the
-		 * driver but don't bother for the time being.
+		/* If SNotification is available, leave notification
+		 * handling to sata_async_notification().  If not,
+		 * emulate it by snooping SDB FIS RX area.
+		 *
+		 * Snooping FIS RX area is probably cheaper than
+		 * poking SNotification but some constrollers which
+		 * implement SNotification, ICH9 for example, don't
+		 * store AN SDB FIS into receive area.
 		 */
-		const __le32 *f = pp->rx_fis + RX_FIS_SDB;
-		u32 f0 = le32_to_cpu(f[0]);
-
-		if (f0 & (1 << 15))
+		if (hpriv->cap & HOST_CAP_SNTF)
 			sata_async_notification(ap);
+		else {
+			/* If the 'N' bit in word 0 of the FIS is set,
+			 * we just received asynchronous notification.
+			 * Tell libata about it.
+			 */
+			const __le32 *f = pp->rx_fis + RX_FIS_SDB;
+			u32 f0 = le32_to_cpu(f[0]);
+
+			if (f0 & (1 << 15))
+				sata_async_notification(ap);
+		}
 	}
 
 	/* pp->active_link is valid iff any command is in flight */
-- 
cgit v1.2.3-70-g09d2


From 2b789108fc1dcba22050a7e6e29ae5ebaea427dd Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 15:05:44 +0900
Subject: libata: add @timeout to ata_exec_internal[_sg]()

Add @timeout argument to ata_exec_internal[_sg]().  If 0, default
timeout ata_probe_timeout is used.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-acpi.c |  2 +-
 drivers/ata/libata-core.c | 32 ++++++++++++++++++++------------
 drivers/ata/libata-eh.c   |  4 ++--
 drivers/ata/libata.h      |  5 +++--
 4 files changed, 26 insertions(+), 17 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index f862e07d92f..3f753358904 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -478,7 +478,7 @@ static int taskfile_load_raw(struct ata_device *dev,
 			       tf.lbal, tf.lbam, tf.lbah, tf.device);
 
 	rtf = tf;
-	err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0);
+	err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0, 0);
 	if (err_mask) {
 		ata_dev_printk(dev, KERN_ERR,
 			"ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed "
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index db760e2dc30..59ebc5d5100 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -926,7 +926,7 @@ static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
 	tf.protocol |= ATA_PROT_NODATA;
 	tf.device |= ATA_LBA;
 
-	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
 	if (err_mask) {
 		ata_dev_printk(dev, KERN_WARNING, "failed to read native "
 			       "max address (err_mask=0x%x)\n", err_mask);
@@ -988,7 +988,7 @@ static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
 	tf.lbam = (new_sectors >> 8) & 0xff;
 	tf.lbah = (new_sectors >> 16) & 0xff;
 
-	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
 	if (err_mask) {
 		ata_dev_printk(dev, KERN_WARNING, "failed to set "
 			       "max address (err_mask=0x%x)\n", err_mask);
@@ -1394,6 +1394,7 @@ static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
  *	@dma_dir: Data tranfer direction of the command
  *	@sg: sg list for the data buffer of the command
  *	@n_elem: Number of sg entries
+ *	@timeout: Timeout in msecs (0 for default)
  *
  *	Executes libata internal command with timeout.  @tf contains
  *	command on entry and result on return.  Timeout and error
@@ -1410,7 +1411,7 @@ static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
 unsigned ata_exec_internal_sg(struct ata_device *dev,
 			      struct ata_taskfile *tf, const u8 *cdb,
 			      int dma_dir, struct scatterlist *sg,
-			      unsigned int n_elem)
+			      unsigned int n_elem, unsigned long timeout)
 {
 	struct ata_link *link = dev->link;
 	struct ata_port *ap = link->ap;
@@ -1486,7 +1487,10 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
 
 	spin_unlock_irqrestore(ap->lock, flags);
 
-	rc = wait_for_completion_timeout(&wait, ata_probe_timeout);
+	if (!timeout)
+		timeout = ata_probe_timeout * 1000 / HZ;
+
+	rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
 
 	ata_port_flush_task(ap);
 
@@ -1571,6 +1575,7 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
  *	@dma_dir: Data tranfer direction of the command
  *	@buf: Data buffer of the command
  *	@buflen: Length of data buffer
+ *	@timeout: Timeout in msecs (0 for default)
  *
  *	Wrapper around ata_exec_internal_sg() which takes simple
  *	buffer instead of sg list.
@@ -1583,7 +1588,8 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
  */
 unsigned ata_exec_internal(struct ata_device *dev,
 			   struct ata_taskfile *tf, const u8 *cdb,
-			   int dma_dir, void *buf, unsigned int buflen)
+			   int dma_dir, void *buf, unsigned int buflen,
+			   unsigned long timeout)
 {
 	struct scatterlist *psg = NULL, sg;
 	unsigned int n_elem = 0;
@@ -1595,7 +1601,8 @@ unsigned ata_exec_internal(struct ata_device *dev,
 		n_elem++;
 	}
 
-	return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem);
+	return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
+				    timeout);
 }
 
 /**
@@ -1622,7 +1629,7 @@ unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
 	tf.flags |= ATA_TFLAG_DEVICE;
 	tf.protocol = ATA_PROT_NODATA;
 
-	return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
 }
 
 /**
@@ -1737,7 +1744,7 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 	tf.flags |= ATA_TFLAG_POLLING;
 
 	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
-				     id, sizeof(id[0]) * ATA_ID_WORDS);
+				     id, sizeof(id[0]) * ATA_ID_WORDS, 0);
 	if (err_mask) {
 		if (err_mask & AC_ERR_NODEV_HINT) {
 			DPRINTK("ata%u.%d: NODEV after polling detection\n",
@@ -1796,7 +1803,8 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 		tf.feature = SETFEATURES_SPINUP;
 		tf.protocol = ATA_PROT_NODATA;
 		tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
-		err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+		err_mask = ata_exec_internal(dev, &tf, NULL,
+					     DMA_NONE, NULL, 0, 0);
 		if (err_mask && id[2] != 0x738c) {
 			rc = -EIO;
 			reason = "SPINUP failed";
@@ -4157,7 +4165,7 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
 	tf.protocol = ATA_PROT_NODATA;
 	tf.nsect = dev->xfer_mode;
 
-	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
 
 	DPRINTK("EXIT, err_mask=%x\n", err_mask);
 	return err_mask;
@@ -4193,7 +4201,7 @@ static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable)
 	tf.protocol = ATA_PROT_NODATA;
 	tf.nsect = SATA_AN;
 
-	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
 
 	DPRINTK("EXIT, err_mask=%x\n", err_mask);
 	return err_mask;
@@ -4231,7 +4239,7 @@ static unsigned int ata_dev_init_params(struct ata_device *dev,
 	tf.nsect = sectors;
 	tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
 
-	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
+	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
 	/* A clean abort indicates an original or just out of spec drive
 	   and we should continue as we issue the setup based on the
 	   drive reported working geometry */
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 8aa61403303..c0e9a42e6ae 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1249,7 +1249,7 @@ static unsigned int ata_read_log_page(struct ata_device *dev,
 	tf.protocol = ATA_PROT_PIO;
 
 	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
-				     buf, sectors * ATA_SECT_SIZE);
+				     buf, sectors * ATA_SECT_SIZE, 0);
 
 	DPRINTK("EXIT, err_mask=%x\n", err_mask);
 	return err_mask;
@@ -1363,7 +1363,7 @@ static unsigned int atapi_eh_request_sense(struct ata_queued_cmd *qc)
 	}
 
 	return ata_exec_internal(dev, &tf, cdb, DMA_FROM_DEVICE,
-				 sense_buf, SCSI_SENSE_BUFFERSIZE);
+				 sense_buf, SCSI_SENSE_BUFFERSIZE, 0);
 }
 
 /**
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index f8bd955c5ba..90df58a3edc 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -69,11 +69,12 @@ extern void ata_dev_disable(struct ata_device *dev);
 extern void ata_port_flush_task(struct ata_port *ap);
 extern unsigned ata_exec_internal(struct ata_device *dev,
 				  struct ata_taskfile *tf, const u8 *cdb,
-				  int dma_dir, void *buf, unsigned int buflen);
+				  int dma_dir, void *buf, unsigned int buflen,
+				  unsigned long timeout);
 extern unsigned ata_exec_internal_sg(struct ata_device *dev,
 				     struct ata_taskfile *tf, const u8 *cdb,
 				     int dma_dir, struct scatterlist *sg,
-				     unsigned int n_elem);
+				     unsigned int n_elem, unsigned long timeout);
 extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 			   unsigned int flags, u16 *id);
-- 
cgit v1.2.3-70-g09d2


From afaa5c373d2c49ee4865847031b82f1377f609d0 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 15:06:10 +0900
Subject: libata: implement ATA_PFLAG_RESETTING

Implement ATA_PFLAG_RESETTING.  This flag is set while reset is in
progress.  It's set before prereset is called and cleared after reset
fails or postreset is finished.

This flag itself doesn't have any function.  It will be used by LLDs
to tell whether reset is in progress if it needs to behave differently
during reset.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/libata-eh.c | 11 +++++++++++
 include/linux/libata.h  |  1 +
 2 files changed, 12 insertions(+)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index c0e9a42e6ae..1f84e40fa6a 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2063,6 +2063,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
 		 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 		 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset)
 {
+	struct ata_port *ap = link->ap;
 	struct ata_eh_context *ehc = &link->eh_context;
 	unsigned int *classes = ehc->classes;
 	int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
@@ -2071,9 +2072,14 @@ int ata_eh_reset(struct ata_link *link, int classify,
 	unsigned long deadline;
 	unsigned int action;
 	ata_reset_fn_t reset;
+	unsigned long flags;
 	int rc;
 
 	/* about to reset */
+	spin_lock_irqsave(ap->lock, flags);
+	ap->pflags |= ATA_PFLAG_RESETTING;
+	spin_unlock_irqrestore(ap->lock, flags);
+
 	ata_eh_about_to_do(link, NULL, ehc->i.action & ATA_EH_RESET_MASK);
 
 	/* Determine which reset to use and record in ehc->i.action.
@@ -2231,6 +2237,11 @@ int ata_eh_reset(struct ata_link *link, int classify,
  out:
 	/* clear hotplug flag */
 	ehc->i.flags &= ~ATA_EHI_HOTPLUGGED;
+
+	spin_lock_irqsave(ap->lock, flags);
+	ap->pflags &= ~ATA_PFLAG_RESETTING;
+	spin_unlock_irqrestore(ap->lock, flags);
+
 	return rc;
 }
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 751aabc21a3..529af9fbed5 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -210,6 +210,7 @@ enum {
 	ATA_PFLAG_UNLOADING	= (1 << 5), /* module is unloading */
 	ATA_PFLAG_SCSI_HOTPLUG	= (1 << 6), /* SCSI hotplug scheduled */
 	ATA_PFLAG_INITIALIZING	= (1 << 7), /* being initialized, don't touch */
+	ATA_PFLAG_RESETTING	= (1 << 8), /* reset in progress */
 
 	ATA_PFLAG_SUSPENDED	= (1 << 17), /* port is suspended (power) */
 	ATA_PFLAG_PM_PENDING	= (1 << 18), /* PM operation pending */
-- 
cgit v1.2.3-70-g09d2


From b06ce3e51e3df4394a584c234f11240b1c6f8d5b Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 9 Oct 2007 15:06:48 +0900
Subject: libata: use ata_exec_internal() for PMP register access

PMP registers used to be accessed with dedicated accessors ->pmp_read
and ->pmp_write.  During reset, those callbacks are called with the
port frozen so they should be able to run without depending on
interrupt delivery.  To achieve this, they were implemented polling.

However, as resetting the host port makes the PMP to isolate fan-out
ports until SError.X is cleared, resetting fan-out ports while port is
frozen doesn't buy much additional safety.

This patch updates libata PMP support such that PMP registers are
accessed using regular ata_exec_internal() mechanism and kills
->pmp_read/write() callbacks.  The following changes are made.

* PMP access helpers - sata_pmp_read_init_tf(), sata_pmp_read_val(),
  sata_pmp_write_init_tf() are folded into sata_pmp_read/write() which
  are now standalone PMP register access functions.

* sata_pmp_read/write() returns err_mask instead of rc.  This is
  consistent with other functions which issue internal commands and
  allows more detailed error reporting.

* ahci interrupt handler is modified to ignore BAD_PMP and
  spurious/illegal completion IRQs while reset is in progress.  These
  conditions are expected during reset.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
 drivers/ata/ahci.c        |  48 +++--------
 drivers/ata/libata-core.c |   3 -
 drivers/ata/libata-eh.c   |  17 +++-
 drivers/ata/libata-pmp.c  | 209 ++++++++++++++++++++--------------------------
 drivers/ata/sata_sil24.c  |  30 -------
 include/linux/libata.h    |   8 --
 6 files changed, 118 insertions(+), 197 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index abfb72aae3d..10bc3f64c45 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -239,8 +239,6 @@ static void ahci_freeze(struct ata_port *ap);
 static void ahci_thaw(struct ata_port *ap);
 static void ahci_pmp_attach(struct ata_port *ap);
 static void ahci_pmp_detach(struct ata_port *ap);
-static int ahci_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val);
-static int ahci_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val);
 static void ahci_error_handler(struct ata_port *ap);
 static void ahci_vt8251_error_handler(struct ata_port *ap);
 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
@@ -297,8 +295,6 @@ static const struct ata_port_operations ahci_ops = {
 
 	.pmp_attach		= ahci_pmp_attach,
 	.pmp_detach		= ahci_pmp_detach,
-	.pmp_read		= ahci_pmp_read,
-	.pmp_write		= ahci_pmp_write,
 
 #ifdef CONFIG_PM
 	.port_suspend		= ahci_port_suspend,
@@ -333,8 +329,6 @@ static const struct ata_port_operations ahci_vt8251_ops = {
 
 	.pmp_attach		= ahci_pmp_attach,
 	.pmp_detach		= ahci_pmp_detach,
-	.pmp_read		= ahci_pmp_read,
-	.pmp_write		= ahci_pmp_write,
 
 #ifdef CONFIG_PM
 	.port_suspend		= ahci_port_suspend,
@@ -1421,12 +1415,17 @@ static void ahci_port_intr(struct ata_port *ap)
 	struct ata_eh_info *ehi = &ap->link.eh_info;
 	struct ahci_port_priv *pp = ap->private_data;
 	struct ahci_host_priv *hpriv = ap->host->private_data;
+	int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
 	u32 status, qc_active;
 	int rc, known_irq = 0;
 
 	status = readl(port_mmio + PORT_IRQ_STAT);
 	writel(status, port_mmio + PORT_IRQ_STAT);
 
+	/* ignore BAD_PMP while resetting */
+	if (unlikely(resetting))
+		status &= ~PORT_IRQ_BAD_PMP;
+
 	if (unlikely(status & PORT_IRQ_ERROR)) {
 		ahci_error_intr(ap, status);
 		return;
@@ -1464,6 +1463,13 @@ static void ahci_port_intr(struct ata_port *ap)
 		qc_active = readl(port_mmio + PORT_CMD_ISSUE);
 
 	rc = ata_qc_complete_multiple(ap, qc_active, NULL);
+
+	/* If resetting, spurious or invalid completions are expected,
+	 * return unconditionally.
+	 */
+	if (resetting)
+		return;
+
 	if (rc > 0)
 		return;
 	if (rc < 0) {
@@ -1701,36 +1707,6 @@ static void ahci_pmp_detach(struct ata_port *ap)
 	writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
 }
 
-static int ahci_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val)
-{
-	struct ata_port *ap = dev->link->ap;
-	struct ata_taskfile tf;
-	int rc;
-
-	ahci_kick_engine(ap, 0);
-
-	sata_pmp_read_init_tf(&tf, dev, pmp, reg);
-	rc = ahci_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0,
-				  SATA_PMP_SCR_TIMEOUT);
-	if (rc == 0) {
-		ahci_tf_read(ap, &tf);
-		*r_val = sata_pmp_read_val(&tf);
-	}
-	return rc;
-}
-
-static int ahci_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val)
-{
-	struct ata_port *ap = dev->link->ap;
-	struct ata_taskfile tf;
-
-	ahci_kick_engine(ap, 0);
-
-	sata_pmp_write_init_tf(&tf, dev, pmp, reg, val);
-	return ahci_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0,
-				    SATA_PMP_SCR_TIMEOUT);
-}
-
 static int ahci_port_resume(struct ata_port *ap)
 {
 	ahci_power_up(ap);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 59ebc5d5100..ce8ccb434af 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -7354,9 +7354,6 @@ EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
 #endif /* CONFIG_PCI */
 
 EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
-EXPORT_SYMBOL_GPL(sata_pmp_read_init_tf);
-EXPORT_SYMBOL_GPL(sata_pmp_read_val);
-EXPORT_SYMBOL_GPL(sata_pmp_write_init_tf);
 EXPORT_SYMBOL_GPL(sata_pmp_std_prereset);
 EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset);
 EXPORT_SYMBOL_GPL(sata_pmp_std_postreset);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 1f84e40fa6a..5a2b2af4d0c 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2557,7 +2557,11 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 
 	/* reset */
 	if (reset) {
-		ata_eh_freeze_port(ap);
+		/* if PMP is attached, this function only deals with
+		 * downstream links, port should stay thawed.
+		 */
+		if (!ap->nr_pmp_links)
+			ata_eh_freeze_port(ap);
 
 		ata_port_for_each_link(link, ap) {
 			struct ata_eh_context *ehc = &link->eh_context;
@@ -2575,7 +2579,8 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 			}
 		}
 
-		ata_eh_thaw_port(ap);
+		if (!ap->nr_pmp_links)
+			ata_eh_thaw_port(ap);
 	}
 
 	/* the rest */
@@ -2610,8 +2615,14 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 		if (ata_eh_handle_dev_fail(dev, rc))
 			nr_disabled_devs++;
 
-		if (ap->pflags & ATA_PFLAG_FROZEN)
+		if (ap->pflags & ATA_PFLAG_FROZEN) {
+			/* PMP reset requires working host port.
+			 * Can't retry if it's frozen.
+			 */
+			if (ap->nr_pmp_links)
+				goto out;
 			break;
+		}
 	}
 
 	if (nr_failed_devs) {
diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index f6c4b11336e..c0c4dbcde09 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -17,27 +17,35 @@
  *	@reg: register to read
  *	@r_val: resulting value
  *
- *	Wrapper around ap->ops->pmp_read to make it easier to call and
- *	nomarlize error return value.
+ *	Read PMP register.
  *
  *	LOCKING:
  *	Kernel thread context (may sleep).
  *
  *	RETURNS:
- *	0 on success, -errno on failure.
+ *	0 on success, AC_ERR_* mask on failure.
  */
-static int sata_pmp_read(struct ata_link *link, int reg, u32 *r_val)
+static unsigned int sata_pmp_read(struct ata_link *link, int reg, u32 *r_val)
 {
 	struct ata_port *ap = link->ap;
 	struct ata_device *pmp_dev = ap->link.device;
-	int rc;
-
-	might_sleep();
-
-	rc = ap->ops->pmp_read(pmp_dev, link->pmp, reg, r_val);
-	if (rc)
-		rc = -EIO;
-	return rc;
+	struct ata_taskfile tf;
+	unsigned int err_mask;
+
+	ata_tf_init(pmp_dev, &tf);
+	tf.command = ATA_CMD_PMP_READ;
+	tf.protocol = ATA_PROT_NODATA;
+	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+	tf.feature = reg;
+	tf.device = link->pmp;
+
+	err_mask = ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0,
+				     SATA_PMP_SCR_TIMEOUT);
+	if (err_mask)
+		return err_mask;
+
+	*r_val = tf.nsect | tf.lbal << 8 | tf.lbam << 16 | tf.lbah << 24;
+	return 0;
 }
 
 /**
@@ -46,27 +54,33 @@ static int sata_pmp_read(struct ata_link *link, int reg, u32 *r_val)
  *	@reg: register to write
  *	@r_val: value to write
  *
- *	Wrapper around ap->ops->pmp_write to make it easier to call
- *	and nomarlize error return value.
+ *	Write PMP register.
  *
  *	LOCKING:
  *	Kernel thread context (may sleep).
  *
  *	RETURNS:
- *	0 on success, -errno on failure.
+ *	0 on success, AC_ERR_* mask on failure.
  */
-static int sata_pmp_write(struct ata_link *link, int reg, u32 val)
+static unsigned int sata_pmp_write(struct ata_link *link, int reg, u32 val)
 {
 	struct ata_port *ap = link->ap;
 	struct ata_device *pmp_dev = ap->link.device;
-	int rc;
-
-	might_sleep();
-
-	rc = ap->ops->pmp_write(pmp_dev, link->pmp, reg, val);
-	if (rc)
-		rc = -EIO;
-	return rc;
+	struct ata_taskfile tf;
+
+	ata_tf_init(pmp_dev, &tf);
+	tf.command = ATA_CMD_PMP_WRITE;
+	tf.protocol = ATA_PROT_NODATA;
+	tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+	tf.feature = reg;
+	tf.device = link->pmp;
+	tf.nsect = val & 0xff;
+	tf.lbal = (val >> 8) & 0xff;
+	tf.lbam = (val >> 16) & 0xff;
+	tf.lbah = (val >> 24) & 0xff;
+
+	return ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0,
+				 SATA_PMP_SCR_TIMEOUT);
 }
 
 /**
@@ -99,71 +113,6 @@ int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc)
 	return ATA_DEFER_PORT;
 }
 
-/**
- *	sata_pmp_read_init_tf - initialize TF for PMP read
- *	@tf: taskfile to initialize
- *	@dev: PMP dev
- *	@pmp: port multiplier port number
- *	@reg: register to read
- *
- *	Initialize @tf for PMP read command.
- *
- *	LOCKING:
- *	None.
- */
-void sata_pmp_read_init_tf(struct ata_taskfile *tf,
-			   struct ata_device *dev, int pmp, int reg)
-{
-	ata_tf_init(dev, tf);
-	tf->command = ATA_CMD_PMP_READ;
-	tf->protocol = ATA_PROT_NODATA;
-	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
-	tf->feature = reg;
-	tf->device = pmp;
-}
-
-/**
- *	sata_pmp_read_val - extract PMP read result from TF
- *	@tf: target TF
- *
- *	Determine PMP read result from @tf.
- *
- *	LOCKING:
- *	None.
- */
-u32 sata_pmp_read_val(const struct ata_taskfile *tf)
-{
-	return tf->nsect | tf->lbal << 8 | tf->lbam << 16 | tf->lbah << 24;
-}
-
-/**
- *	sata_pmp_read_init_tf - initialize TF for PMP write
- *	@tf: taskfile to initialize
- *	@dev: PMP dev
- *	@pmp: port multiplier port number
- *	@reg: register to read
- *	@val: value to write
- *
- *	Initialize @tf for PMP write command.
- *
- *	LOCKING:
- *	None.
- */
-void sata_pmp_write_init_tf(struct ata_taskfile *tf,
-			    struct ata_device *dev, int pmp, int reg, u32 val)
-{
-	ata_tf_init(dev, tf);
-	tf->command = ATA_CMD_PMP_WRITE;
-	tf->protocol = ATA_PROT_NODATA;
-	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
-	tf->feature = reg;
-	tf->device = pmp;
-	tf->nsect = val & 0xff;
-	tf->lbal = (val >> 8) & 0xff;
-	tf->lbam = (val >> 16) & 0xff;
-	tf->lbah = (val >> 24) & 0xff;
-}
-
 /**
  *	sata_pmp_scr_read - read PSCR
  *	@link: ATA link to read PSCR for
@@ -181,10 +130,18 @@ void sata_pmp_write_init_tf(struct ata_taskfile *tf,
  */
 int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *r_val)
 {
+	unsigned int err_mask;
+
 	if (reg > SATA_PMP_PSCR_CONTROL)
 		return -EINVAL;
 
-	return sata_pmp_read(link, reg, r_val);
+	err_mask = sata_pmp_read(link, reg, r_val);
+	if (err_mask) {
+		ata_link_printk(link, KERN_WARNING, "failed to read SCR %d "
+				"(Emask=0x%x)\n", reg, err_mask);
+		return -EIO;
+	}
+	return 0;
 }
 
 /**
@@ -204,10 +161,18 @@ int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *r_val)
  */
 int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
 {
+	unsigned int err_mask;
+
 	if (reg > SATA_PMP_PSCR_CONTROL)
 		return -EINVAL;
 
-	return sata_pmp_write(link, reg, val);
+	err_mask = sata_pmp_write(link, reg, val);
+	if (err_mask) {
+		ata_link_printk(link, KERN_WARNING, "failed to write SCR %d "
+				"(Emask=0x%x)\n", reg, err_mask);
+		return -EIO;
+	}
+	return 0;
 }
 
 /**
@@ -361,16 +326,17 @@ void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class)
 static int sata_pmp_read_gscr(struct ata_device *dev, u32 *gscr)
 {
 	static const int gscr_to_read[] = { 0, 1, 2, 32, 33, 64, 96 };
-	int i, rc;
+	int i;
 
 	for (i = 0; i < ARRAY_SIZE(gscr_to_read); i++) {
 		int reg = gscr_to_read[i];
+		unsigned int err_mask;
 
-		rc = sata_pmp_read(dev->link, reg, &gscr[reg]);
-		if (rc) {
-			ata_dev_printk(dev, KERN_ERR, "failed to read "
-				       "PMP GSCR[%d] (errno=%d)\n", reg, rc);
-			return rc;
+		err_mask = sata_pmp_read(dev->link, reg, &gscr[reg]);
+		if (err_mask) {
+			ata_dev_printk(dev, KERN_ERR, "failed to read PMP "
+				"GSCR[%d] (Emask=0x%x)\n", reg, err_mask);
+			return -EIO;
 		}
 	}
 
@@ -392,6 +358,7 @@ static int sata_pmp_configure(struct ata_device *dev, int print_info)
 {
 	struct ata_port *ap = dev->link->ap;
 	u32 *gscr = dev->gscr;
+	unsigned int err_mask = 0;
 	const char *reason;
 	int nr_ports, rc;
 
@@ -408,8 +375,10 @@ static int sata_pmp_configure(struct ata_device *dev, int print_info)
 		dev->flags |= ATA_DFLAG_AN;
 
 	/* monitor SERR_PHYRDY_CHG on fan-out ports */
-	rc = sata_pmp_write(dev->link, SATA_PMP_GSCR_ERROR_EN, SERR_PHYRDY_CHG);
-	if (rc) {
+	err_mask = sata_pmp_write(dev->link, SATA_PMP_GSCR_ERROR_EN,
+				  SERR_PHYRDY_CHG);
+	if (err_mask) {
+		rc = -EIO;
 		reason = "failed to write GSCR_ERROR_EN";
 		goto fail;
 	}
@@ -418,9 +387,10 @@ static int sata_pmp_configure(struct ata_device *dev, int print_info)
 	if (gscr[SATA_PMP_GSCR_FEAT_EN] & SATA_PMP_FEAT_NOTIFY) {
 		gscr[SATA_PMP_GSCR_FEAT_EN] &= ~SATA_PMP_FEAT_NOTIFY;
 
-		rc = sata_pmp_write(dev->link, SATA_PMP_GSCR_FEAT_EN,
-				    gscr[SATA_PMP_GSCR_FEAT_EN]);
-		if (rc) {
+		err_mask = sata_pmp_write(dev->link, SATA_PMP_GSCR_FEAT_EN,
+					  gscr[SATA_PMP_GSCR_FEAT_EN]);
+		if (err_mask) {
+			rc = -EIO;
 			reason = "failed to write GSCR_FEAT_EN";
 			goto fail;
 		}
@@ -447,7 +417,8 @@ static int sata_pmp_configure(struct ata_device *dev, int print_info)
 
  fail:
 	ata_dev_printk(dev, KERN_ERR,
-		       "failed to configure Port Multiplier (%s)\n", reason);
+		       "failed to configure Port Multiplier (%s, Emask=0x%x)\n",
+		       reason, err_mask);
 	return rc;
 }
 
@@ -812,13 +783,14 @@ static int sata_pmp_revalidate(struct ata_device *dev, unsigned int new_class)
  */
 static int sata_pmp_revalidate_quick(struct ata_device *dev)
 {
+	unsigned int err_mask;
 	u32 prod_id;
-	int rc;
 
-	rc = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id);
-	if (rc) {
-		ata_dev_printk(dev, KERN_ERR, "failed to read PMP product ID\n");
-		return rc;
+	err_mask = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id);
+	if (err_mask) {
+		ata_dev_printk(dev, KERN_ERR, "failed to read PMP product ID "
+			       "(Emask=0x%x)\n", err_mask);
+		return -EIO;
 	}
 
 	if (prod_id != dev->gscr[SATA_PMP_GSCR_PROD_ID]) {
@@ -1049,6 +1021,7 @@ static int sata_pmp_eh_recover(struct ata_port *ap,
 	struct ata_eh_context *pmp_ehc = &pmp_link->eh_context;
 	struct ata_link *link;
 	struct ata_device *dev;
+	unsigned int err_mask;
 	u32 gscr_error, sntf;
 	int cnt, rc;
 
@@ -1107,20 +1080,22 @@ static int sata_pmp_eh_recover(struct ata_port *ap,
 	if (pmp_dev->flags & ATA_DFLAG_AN) {
 		pmp_dev->gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY;
 
-		rc = sata_pmp_write(pmp_dev->link, SATA_PMP_GSCR_FEAT_EN,
-				    pmp_dev->gscr[SATA_PMP_GSCR_FEAT_EN]);
-		if (rc) {
-			ata_dev_printk(pmp_dev, KERN_ERR,
-				       "failed to write PMP_FEAT_EN\n");
+		err_mask = sata_pmp_write(pmp_dev->link, SATA_PMP_GSCR_FEAT_EN,
+					  pmp_dev->gscr[SATA_PMP_GSCR_FEAT_EN]);
+		if (err_mask) {
+			ata_dev_printk(pmp_dev, KERN_ERR, "failed to write "
+				       "PMP_FEAT_EN (Emask=0x%x)\n", err_mask);
+			rc = -EIO;
 			goto pmp_fail;
 		}
 	}
 
 	/* check GSCR_ERROR */
-	rc = sata_pmp_read(pmp_link, SATA_PMP_GSCR_ERROR, &gscr_error);
-	if (rc) {
-		ata_dev_printk(pmp_dev, KERN_ERR,
-			       "failed to read PMP_GSCR_ERROR\n");
+	err_mask = sata_pmp_read(pmp_link, SATA_PMP_GSCR_ERROR, &gscr_error);
+	if (err_mask) {
+		ata_dev_printk(pmp_dev, KERN_ERR, "failed to read "
+			       "PMP_GSCR_ERROR (Emask=0x%x)\n", err_mask);
+		rc = -EIO;
 		goto pmp_fail;
 	}
 
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 15b9a80a178..b0619278454 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -337,8 +337,6 @@ static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
 static void sil24_irq_clear(struct ata_port *ap);
 static void sil24_pmp_attach(struct ata_port *ap);
 static void sil24_pmp_detach(struct ata_port *ap);
-static int sil24_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val);
-static int sil24_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val);
 static void sil24_freeze(struct ata_port *ap);
 static void sil24_thaw(struct ata_port *ap);
 static void sil24_error_handler(struct ata_port *ap);
@@ -411,8 +409,6 @@ static const struct ata_port_operations sil24_ops = {
 
 	.pmp_attach		= sil24_pmp_attach,
 	.pmp_detach		= sil24_pmp_detach,
-	.pmp_read		= sil24_pmp_read,
-	.pmp_write		= sil24_pmp_write,
 
 	.freeze			= sil24_freeze,
 	.thaw			= sil24_thaw,
@@ -928,32 +924,6 @@ static void sil24_pmp_detach(struct ata_port *ap)
 	sil24_config_pmp(ap, 0);
 }
 
-static int sil24_pmp_read(struct ata_device *dev, int pmp, int reg, u32 *r_val)
-{
-	struct ata_port *ap = dev->link->ap;
-	struct ata_taskfile tf;
-	int rc;
-
-	sata_pmp_read_init_tf(&tf, dev, pmp, reg);
-	rc = sil24_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0,
-				   SATA_PMP_SCR_TIMEOUT);
-	if (rc == 0) {
-		sil24_read_tf(ap, 0, &tf);
-		*r_val = sata_pmp_read_val(&tf);
-	}
-	return rc;
-}
-
-static int sil24_pmp_write(struct ata_device *dev, int pmp, int reg, u32 val)
-{
-	struct ata_port *ap = dev->link->ap;
-	struct ata_taskfile tf;
-
-	sata_pmp_write_init_tf(&tf, dev, pmp, reg, val);
-	return sil24_exec_polled_cmd(ap, SATA_PMP_CTRL_PORT, &tf, 1, 0,
-				     SATA_PMP_SCR_TIMEOUT);
-}
-
 static int sil24_pmp_softreset(struct ata_link *link, unsigned int *class,
 			       unsigned long deadline)
 {
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 529af9fbed5..2439f1fa47a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -669,8 +669,6 @@ struct ata_port_operations {
 	/* port multiplier */
 	void (*pmp_attach) (struct ata_port *ap);
 	void (*pmp_detach) (struct ata_port *ap);
-	int (*pmp_read) (struct ata_device *dev, int pmp, int reg, u32 *r_val);
-	int (*pmp_write) (struct ata_device *dev, int pmp, int reg, u32 val);
 
 	/* Error handlers.  ->error_handler overrides ->eng_timeout and
 	 * indicates that new-style EH is in place.
@@ -957,12 +955,6 @@ extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
  * PMP
  */
 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
-extern void sata_pmp_read_init_tf(struct ata_taskfile *tf,
-				  struct ata_device *dev, int pmp, int reg);
-extern u32 sata_pmp_read_val(const struct ata_taskfile *tf);
-extern void sata_pmp_write_init_tf(struct ata_taskfile *tf,
-				   struct ata_device *dev,
-				   int pmp, int reg, u32 val);
 extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
 extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
 				  unsigned long deadline);
-- 
cgit v1.2.3-70-g09d2


From 2855568b1ee4f58ef2c0a13ddfceb4b0b216b7ed Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jeff@garzik.org>
Date: Thu, 11 Oct 2007 17:12:35 -0400
Subject: [libata] struct pci_dev related cleanups

* remove pointless pci_dev_to_dev() wrapper.  Just directly reference
  the embedded struct device like everyone else does.

* pata_cs5520: delete cs5520_remove_one(), it was a duplicate of
  ata_pci_remove_one()

* linux/libata.h: don't bother including linux/pci.h, we don't need it.
  Simply declare 'struct pci_dev' and assume interested parties will
  include the header, as they should be doing anyway.

* linux/libata.h: consolidate all CONFIG_PCI declarations into a
  single location in the header.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
 drivers/ata/libata-core.c |  2 +-
 drivers/ata/libata-eh.c   |  1 +
 drivers/ata/pata_cs5520.c | 20 +-------------------
 include/linux/libata.h    | 33 ++++++++++++++-------------------
 4 files changed, 17 insertions(+), 39 deletions(-)

(limited to 'drivers/ata')

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index ce8ccb434af..b05384a8c32 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -7007,7 +7007,7 @@ void ata_std_ports(struct ata_ioports *ioaddr)
  */
 void ata_pci_remove_one(struct pci_dev *pdev)
 {
-	struct device *dev = pci_dev_to_dev(pdev);
+	struct device *dev = &pdev->dev;
 	struct ata_host *host = dev_get_drvdata(dev);
 
 	ata_host_detach(host);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 5a2b2af4d0c..2eaa39fc65d 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -33,6 +33,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/pci.h>
 #include <scsi/scsi.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_eh.h>
diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index ff1eb84c7d2..33f7f0843f4 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -299,24 +299,6 @@ static int __devinit cs5520_init_one(struct pci_dev *pdev, const struct pci_devi
 	return ata_host_register(host, &cs5520_sht);
 }
 
-/**
- *	cs5520_remove_one	-	device unload
- *	@pdev: PCI device being removed
- *
- *	Handle an unplug/unload event for a PCI device. Unload the
- *	PCI driver but do not use the default handler as we manage
- *	resources ourself and *MUST NOT* disable the device as it has
- *	other functions.
- */
-
-static void __devexit cs5520_remove_one(struct pci_dev *pdev)
-{
-	struct device *dev = pci_dev_to_dev(pdev);
-	struct ata_host *host = dev_get_drvdata(dev);
-
-	ata_host_detach(host);
-}
-
 #ifdef CONFIG_PM
 /**
  *	cs5520_reinit_one	-	device resume
@@ -373,7 +355,7 @@ static struct pci_driver cs5520_pci_driver = {
 	.name 		= DRV_NAME,
 	.id_table	= pata_cs5520,
 	.probe 		= cs5520_init_one,
-	.remove		= cs5520_remove_one,
+	.remove		= ata_pci_remove_one,
 #ifdef CONFIG_PM
 	.suspend	= cs5520_pci_device_suspend,
 	.resume		= cs5520_reinit_one,
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 2439f1fa47a..229a9ff9f92 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -28,7 +28,6 @@
 
 #include <linux/delay.h>
 #include <linux/interrupt.h>
-#include <linux/pci.h>
 #include <linux/dma-mapping.h>
 #include <asm/scatterlist.h>
 #include <linux/io.h>
@@ -107,12 +106,6 @@ static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
 /* defines only for the constants which don't work well as enums */
 #define ATA_TAG_POISON		0xfafbfcfdU
 
-/* move to PCI layer? */
-static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
-{
-	return &pdev->dev;
-}
-
 enum {
 	/* various global constants */
 	LIBATA_MAX_PRD		= ATA_MAX_PRD / 2,
@@ -766,18 +759,7 @@ extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
 extern void ata_port_disable(struct ata_port *);
 extern void ata_std_ports(struct ata_ioports *ioaddr);
-#ifdef CONFIG_PCI
-extern int ata_pci_init_one (struct pci_dev *pdev,
-			     const struct ata_port_info * const * ppi);
-extern void ata_pci_remove_one (struct pci_dev *pdev);
-#ifdef CONFIG_PM
-extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
-extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
-extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
-extern int ata_pci_device_resume(struct pci_dev *pdev);
-#endif
-extern int ata_pci_clear_simplex(struct pci_dev *pdev);
-#endif /* CONFIG_PCI */
+
 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
 			const struct ata_port_info * const * ppi, int n_ports);
@@ -935,6 +917,19 @@ static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
 #endif
 
 #ifdef CONFIG_PCI
+struct pci_dev;
+
+extern int ata_pci_init_one (struct pci_dev *pdev,
+			     const struct ata_port_info * const * ppi);
+extern void ata_pci_remove_one (struct pci_dev *pdev);
+#ifdef CONFIG_PM
+extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
+extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
+extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
+extern int ata_pci_device_resume(struct pci_dev *pdev);
+#endif
+extern int ata_pci_clear_simplex(struct pci_dev *pdev);
+
 struct pci_bits {
 	unsigned int		reg;	/* PCI config register to read */
 	unsigned int		width;	/* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
-- 
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