From 871af1210f13966ab911ed2166e4ab2ce775b99d Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@redhat.com>
Date: Mon, 5 Jan 2009 14:16:39 +0000
Subject: libata: Add 32bit PIO support
This matters for some controllers and in one or two cases almost doubles
PIO performance. Add a bmdma32 operations set we can inherit and activate
it for some controllers
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
include/linux/libata.h | 3 +++
1 file changed, 3 insertions(+)
(limited to 'include/linux/libata.h')
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 3449de597ef..4f7c8fb4d3f 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1518,6 +1518,7 @@ extern void sata_pmp_error_handler(struct ata_port *ap);
extern const struct ata_port_operations ata_sff_port_ops;
extern const struct ata_port_operations ata_bmdma_port_ops;
+extern const struct ata_port_operations ata_bmdma32_port_ops;
/* PIO only, sg_tablesize and dma_boundary limits can be removed */
#define ATA_PIO_SHT(drv_name) \
@@ -1545,6 +1546,8 @@ extern void ata_sff_exec_command(struct ata_port *ap,
const struct ata_taskfile *tf);
extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
unsigned char *buf, unsigned int buflen, int rw);
+extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
+ unsigned char *buf, unsigned int buflen, int rw);
extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
unsigned char *buf, unsigned int buflen, int rw);
extern u8 ata_sff_irq_on(struct ata_port *ap);
--
cgit v1.2.3-70-g09d2
From 886ad09fc83342aa1c5a02a0b6d3298b78a8067f Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Fri, 9 Jan 2009 15:54:07 -0800
Subject: libata: Add a per-host flag to opt-in into parallel port probes
This patch adds a per host flag that allows drivers to opt in into
having its busses scanned in parallel.
Drivers that do not set this flag get their ports scanned in
the "original" sequence.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/ata/ahci.c | 3 +++
drivers/ata/libata-core.c | 9 +++++++++
include/linux/libata.h | 1 +
3 files changed, 13 insertions(+)
(limited to 'include/linux/libata.h')
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 7f701cbe14a..96039671e3b 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -2660,6 +2660,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
host->iomap = pcim_iomap_table(pdev);
host->private_data = hpriv;
+ if (!(hpriv->cap & HOST_CAP_SSS))
+ host->flags |= ATA_HOST_PARALLEL_SCAN;
+
if (pi.flags & ATA_FLAG_EM)
ahci_reset_em(host);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c507a9ac78f..f810078fafc 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5920,6 +5920,15 @@ static void async_port_probe(void *data, async_cookie_t cookie)
{
int rc;
struct ata_port *ap = data;
+
+ /*
+ * If we're not allowed to scan this host in parallel,
+ * we need to wait until all previous scans have completed
+ * before going further.
+ */
+ if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN))
+ async_synchronize_cookie(cookie);
+
/* probe */
if (ap->ops->error_handler) {
struct ata_eh_info *ehi = &ap->link.eh_info;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 4f7c8fb4d3f..b6b8a7f3ec6 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -239,6 +239,7 @@ enum {
/* host set flags */
ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ATA_HOST_STARTED = (1 << 1), /* Host started */
+ ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
/* bits 24:31 of host->flags are reserved for LLD specific flags */
--
cgit v1.2.3-70-g09d2