diff options
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/sata_mv.c | 703 |
1 files changed, 456 insertions, 247 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 7fa42c36c41..d40c41c5f16 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -29,11 +29,6 @@ I distinctly remember a couple workarounds (one related to PCI-X) are still needed. - 2) Convert to LibATA new EH. Required for hotplug, NCQ, and sane - probing/error handling in general. MUST HAVE. - - 3) Add hotplug support (easy, once new-EH support appears) - 4) Add NCQ support (easy to intermediate, once new-EH support appears) 5) Investigate problems with PCI Message Signalled Interrupts (MSI). @@ -132,8 +127,8 @@ enum { MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */ MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */ MV_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | - ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING, + ATA_FLAG_MMIO | ATA_FLAG_NO_ATAPI | + ATA_FLAG_PIO_POLLING, MV_6XXX_FLAGS = MV_FLAG_IRQ_COALESCE, CRQB_FLAG_READ = (1 << 0), @@ -254,13 +249,31 @@ enum { EDMA_ERR_TRANS_PROTO = (1 << 31), EDMA_ERR_OVERRUN_5 = (1 << 5), EDMA_ERR_UNDERRUN_5 = (1 << 6), - EDMA_ERR_FATAL = (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR | - EDMA_ERR_DEV_DCON | EDMA_ERR_CRBQ_PAR | - EDMA_ERR_CRPB_PAR | EDMA_ERR_INTRL_PAR | - EDMA_ERR_IORDY | EDMA_ERR_LNK_CTRL_RX_2 | - EDMA_ERR_LNK_DATA_RX | - EDMA_ERR_LNK_DATA_TX | - EDMA_ERR_TRANS_PROTO), + EDMA_EH_FREEZE = EDMA_ERR_D_PAR | + EDMA_ERR_PRD_PAR | + EDMA_ERR_DEV_DCON | + EDMA_ERR_DEV_CON | + EDMA_ERR_SERR | + EDMA_ERR_SELF_DIS | + EDMA_ERR_CRBQ_PAR | + EDMA_ERR_CRPB_PAR | + EDMA_ERR_INTRL_PAR | + EDMA_ERR_IORDY | + EDMA_ERR_LNK_CTRL_RX_2 | + EDMA_ERR_LNK_DATA_RX | + EDMA_ERR_LNK_DATA_TX | + EDMA_ERR_TRANS_PROTO, + EDMA_EH_FREEZE_5 = EDMA_ERR_D_PAR | + EDMA_ERR_PRD_PAR | + EDMA_ERR_DEV_DCON | + EDMA_ERR_DEV_CON | + EDMA_ERR_OVERRUN_5 | + EDMA_ERR_UNDERRUN_5 | + EDMA_ERR_SELF_DIS_5 | + EDMA_ERR_CRBQ_PAR | + EDMA_ERR_CRPB_PAR | + EDMA_ERR_INTRL_PAR | + EDMA_ERR_IORDY, EDMA_REQ_Q_BASE_HI_OFS = 0x10, EDMA_REQ_Q_IN_PTR_OFS = 0x14, /* also contains BASE_LO */ @@ -359,6 +372,10 @@ struct mv_port_priv { dma_addr_t crpb_dma; struct mv_sg *sg_tbl; dma_addr_t sg_tbl_dma; + + unsigned int req_idx; + unsigned int resp_idx; + u32 pp_flags; }; @@ -391,14 +408,15 @@ 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 void mv_phy_reset(struct ata_port *ap); -static void __mv_phy_reset(struct ata_port *ap, int can_sleep); 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); static void mv_qc_prep_iie(struct ata_queued_cmd *qc); static unsigned int mv_qc_issue(struct ata_queued_cmd *qc); -static void mv_eng_timeout(struct ata_port *ap); +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_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, @@ -422,7 +440,6 @@ static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio); static void mv_reset_pci_bus(struct pci_dev *pdev, void __iomem *mmio); static void mv_channel_reset(struct mv_host_priv *hpriv, void __iomem *mmio, unsigned int port_no); -static void mv_stop_and_reset(struct ata_port *ap); static struct scsi_host_template mv5_sht = { .module = THIS_MODULE, @@ -469,19 +486,21 @@ static const struct ata_port_operations mv5_ops = { .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, - .phy_reset = mv_phy_reset, .cable_detect = ata_cable_sata, .qc_prep = mv_qc_prep, .qc_issue = mv_qc_issue, .data_xfer = ata_data_xfer, - .eng_timeout = mv_eng_timeout, - .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, + .freeze = mv_eh_freeze, + .thaw = mv_eh_thaw, + .scr_read = mv5_scr_read, .scr_write = mv5_scr_write, @@ -498,19 +517,21 @@ static const struct ata_port_operations mv6_ops = { .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, - .phy_reset = mv_phy_reset, .cable_detect = ata_cable_sata, .qc_prep = mv_qc_prep, .qc_issue = mv_qc_issue, .data_xfer = ata_data_xfer, - .eng_timeout = mv_eng_timeout, - .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, + .freeze = mv_eh_freeze, + .thaw = mv_eh_thaw, + .scr_read = mv_scr_read, .scr_write = mv_scr_write, @@ -527,19 +548,21 @@ static const struct ata_port_operations mv_iie_ops = { .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, - .phy_reset = mv_phy_reset, .cable_detect = ata_cable_sata, .qc_prep = mv_qc_prep_iie, .qc_issue = mv_qc_issue, .data_xfer = ata_data_xfer, - .eng_timeout = mv_eng_timeout, - .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, + .freeze = mv_eh_freeze, + .thaw = mv_eh_thaw, + .scr_read = mv_scr_read, .scr_write = mv_scr_write, @@ -738,35 +761,40 @@ static void mv_set_edma_ptrs(void __iomem *port_mmio, struct mv_host_priv *hpriv, struct mv_port_priv *pp) { + u32 index; + /* * initialize request queue */ + index = (pp->req_idx & MV_MAX_Q_DEPTH_MASK) << EDMA_REQ_Q_PTR_SHIFT; + WARN_ON(pp->crqb_dma & 0x3ff); writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI_OFS); - writelfl(pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK, + writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | index, port_mmio + EDMA_REQ_Q_IN_PTR_OFS); if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0) - writelfl(pp->crqb_dma & 0xffffffff, + writelfl((pp->crqb_dma & 0xffffffff) | index, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS); else - writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS); + writelfl(index, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS); /* * initialize response queue */ + index = (pp->resp_idx & MV_MAX_Q_DEPTH_MASK) << EDMA_RSP_Q_PTR_SHIFT; + WARN_ON(pp->crpb_dma & 0xff); writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS); if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0) - writelfl(pp->crpb_dma & 0xffffffff, + writelfl((pp->crpb_dma & 0xffffffff) | index, port_mmio + EDMA_RSP_Q_IN_PTR_OFS); else - writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS); + writelfl(index, port_mmio + EDMA_RSP_Q_IN_PTR_OFS); - writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK, + writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | index, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); - } /** @@ -784,6 +812,11 @@ static void mv_start_dma(void __iomem *base, struct mv_host_priv *hpriv, struct mv_port_priv *pp) { if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) { + /* clear EDMA event indicators, if any */ + writelfl(0, base + EDMA_ERR_IRQ_CAUSE_OFS); + + mv_set_edma_ptrs(base, hpriv, pp); + writelfl(EDMA_EN, base + EDMA_CMD_OFS); pp->pp_flags |= MV_PP_FLAG_EDMA_EN; } @@ -827,7 +860,6 @@ static int mv_stop_dma(struct ata_port *ap) if (reg & EDMA_EN) { ata_port_printk(ap, KERN_ERR, "Unable to stop eDMA\n"); - /* FIXME: Consider doing a reset here to recover */ err = -EIO; } @@ -1101,11 +1133,6 @@ static unsigned int mv_fill_sg(struct ata_queued_cmd *qc) return n_sg; } -static inline unsigned mv_inc_q_index(unsigned index) -{ - return (index + 1) & MV_MAX_Q_DEPTH_MASK; -} - static inline void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last) { u16 tmp = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS | @@ -1145,9 +1172,8 @@ static void mv_qc_prep(struct ata_queued_cmd *qc) flags |= qc->tag << CRQB_TAG_SHIFT; flags |= qc->tag << CRQB_IOID_SHIFT; /* 50xx appears to ignore this*/ - /* get current queue index from hardware */ - in_index = (readl(mv_ap_base(ap) + EDMA_REQ_Q_IN_PTR_OFS) - >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; + /* get current queue index from software */ + in_index = pp->req_idx & MV_MAX_Q_DEPTH_MASK; pp->crqb[in_index].sg_addr = cpu_to_le32(pp->sg_tbl_dma & 0xffffffff); @@ -1237,12 +1263,11 @@ static void mv_qc_prep_iie(struct ata_queued_cmd *qc) WARN_ON(MV_MAX_Q_DEPTH <= qc->tag); flags |= qc->tag << CRQB_TAG_SHIFT; - flags |= qc->tag << CRQB_IOID_SHIFT; /* "I/O Id" is -really- + flags |= qc->tag << CRQB_IOID_SHIFT; /* "I/O Id" is -really- what we use as our tag */ - /* get current queue index from hardware */ - in_index = (readl(mv_ap_base(ap) + EDMA_REQ_Q_IN_PTR_OFS) - >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; + /* get current queue index from software */ + in_index = pp->req_idx & MV_MAX_Q_DEPTH_MASK; crqb = (struct mv_crqb_iie *) &pp->crqb[in_index]; crqb->addr = cpu_to_le32(pp->sg_tbl_dma & 0xffffffff); @@ -1294,8 +1319,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc) void __iomem *port_mmio = mv_ap_base(ap); struct mv_port_priv *pp = ap->private_data; struct mv_host_priv *hpriv = ap->host->private_data; - unsigned in_index; - u32 in_ptr; + u32 in_index; if (qc->tf.protocol != ATA_PROT_DMA) { /* We're about to send a non-EDMA capable command to the @@ -1306,69 +1330,26 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc) return ata_qc_issue_prot(qc); } - in_ptr = readl(port_mmio + EDMA_REQ_Q_IN_PTR_OFS); - in_index = (in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; + mv_start_dma(port_mmio, hpriv, pp); + + in_index = pp->req_idx & MV_MAX_Q_DEPTH_MASK; /* until we do queuing, the queue should be empty at this point */ WARN_ON(in_index != ((readl(port_mmio + EDMA_REQ_Q_OUT_PTR_OFS) >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK)); - in_index = mv_inc_q_index(in_index); /* now incr producer index */ + pp->req_idx++; - mv_start_dma(port_mmio, hpriv, pp); + in_index = (pp->req_idx & MV_MAX_Q_DEPTH_MASK) << EDMA_REQ_Q_PTR_SHIFT; /* and write the request in pointer to kick the EDMA to life */ - in_ptr &= EDMA_REQ_Q_BASE_LO_MASK; - in_ptr |= in_index << EDMA_REQ_Q_PTR_SHIFT; - writelfl(in_ptr, port_mmio + EDMA_REQ_Q_IN_PTR_OFS); + writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | in_index, + port_mmio + EDMA_REQ_Q_IN_PTR_OFS); return 0; } /** - * mv_get_crpb_status - get status from most recently completed cmd - * @ap: ATA channel to manipulate - * - * This routine is for use when the port is in DMA mode, when it - * will be using the CRPB (command response block) method of - * returning command completion information. We check indices - * are good, grab status, and bump the response consumer index to - * prove that we're up to date. - * - * LOCKING: - * Inherited from caller. - */ -static u8 mv_get_crpb_status(struct ata_port *ap) -{ - void __iomem *port_mmio = mv_ap_base(ap); - struct mv_port_priv *pp = ap->private_data; - unsigned out_index; - u32 out_ptr; - u8 ata_status; - - out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); - out_index = (out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; - - ata_status = le16_to_cpu(pp->crpb[out_index].flags) - >> CRPB_FLAG_STATUS_SHIFT; - - /* increment our consumer index... */ - out_index = mv_inc_q_index(out_index); - - /* and, until we do NCQ, there should only be 1 CRPB waiting */ - WARN_ON(out_index != ((readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) - >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK)); - - /* write out our inc'd consumer index so EDMA knows we're caught up */ - out_ptr &= EDMA_RSP_Q_BASE_LO_MASK; - out_ptr |= out_index << EDMA_RSP_Q_PTR_SHIFT; - writelfl(out_ptr, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); - - /* Return ATA status register for completed CRPB */ - return ata_status; -} - -/** * mv_err_intr - Handle error interrupts on the port * @ap: ATA channel to manipulate * @reset_allowed: bool: 0 == don't trigger from reset here @@ -1382,30 +1363,191 @@ static u8 mv_get_crpb_status(struct ata_port *ap) * LOCKING: * Inherited from caller. */ -static void mv_err_intr(struct ata_port *ap, int reset_allowed) +static void mv_err_intr(struct ata_port *ap, struct ata_queued_cmd *qc) { void __iomem *port_mmio = mv_ap_base(ap); - u32 edma_err_cause, serr = 0; + u32 edma_err_cause, eh_freeze_mask, serr = 0; + struct mv_port_priv *pp = ap->private_data; + 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; - edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); + ata_ehi_clear_desc(ehi); - if (EDMA_ERR_SERR & edma_err_cause) { + if (!edma_enabled) { + /* 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); } - if (EDMA_ERR_SELF_DIS & edma_err_cause) { - struct mv_port_priv *pp = ap->private_data; - pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; + + edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); + + ata_ehi_push_desc(ehi, "edma_err 0x%08x", edma_err_cause); + + /* + * all generations share these EDMA error cause bits + */ + + 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_INTRL_PAR)) { + err_mask |= AC_ERR_ATA_BUS; + action |= ATA_EH_HARDRESET; + 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"); + } + + if (IS_50XX(hpriv)) { + eh_freeze_mask = EDMA_EH_FREEZE_5; + + 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"); + } + } else { + eh_freeze_mask = EDMA_EH_FREEZE; + + 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"); + } + + if (edma_err_cause & EDMA_ERR_SERR) { + sata_scr_read(ap, SCR_ERROR, &serr); + sata_scr_write_flush(ap, SCR_ERROR, serr); + err_mask = AC_ERR_ATA_BUS; + action |= ATA_EH_HARDRESET; + } } - DPRINTK(KERN_ERR "ata%u: port error; EDMA err cause: 0x%08x " - "SERR: 0x%08x\n", ap->print_id, edma_err_cause, serr); /* Clear EDMA now that SERR cleanup done */ writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); - /* check for fatal here and recover if needed */ - if (reset_allowed && (EDMA_ERR_FATAL & edma_err_cause)) - mv_stop_and_reset(ap); + if (!err_mask) { + err_mask = AC_ERR_OTHER; + action |= ATA_EH_HARDRESET; + } + + ehi->serror |= serr; + ehi->action |= action; + + if (qc) + qc->err_mask |= err_mask; + else + ehi->err_mask |= err_mask; + + if (edma_err_cause & eh_freeze_mask) + ata_port_freeze(ap); + else + ata_port_abort(ap); +} + +static void mv_intr_pio(struct ata_port *ap) +{ + struct ata_queued_cmd *qc; + u8 ata_status; + + /* ignore spurious intr if drive still BUSY */ + ata_status = readb(ap->ioaddr.status_addr); + if (unlikely(ata_status & ATA_BUSY)) + return; + + /* get active ATA command */ + qc = ata_qc_from_tag(ap, ap->active_tag); + if (unlikely(!qc)) /* no active tag */ + return; + if (qc->tf.flags & ATA_TFLAG_POLLING) /* polling; we don't own qc */ + return; + + /* and finally, complete the ATA command */ + qc->err_mask |= ac_err_mask(ata_status); + ata_qc_complete(qc); +} + +static void mv_intr_edma(struct ata_port *ap) +{ + void __iomem *port_mmio = mv_ap_base(ap); + struct mv_host_priv *hpriv = ap->host->private_data; + struct mv_port_priv *pp = ap->private_data; + struct ata_queued_cmd *qc; + u32 out_index, in_index; + bool work_done = false; + + /* get h/w response queue pointer */ + in_index = (readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) + >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; + + while (1) { + u16 status; + + /* 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); + + /* 60xx: get active ATA command via tag, to enable support + * for queueing. this works transparently for queued and + * non-queued modes. + */ + else { + unsigned int tag; + + 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; + + 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 + * with this command), which -should- be clear + * if all is well + */ + status = le16_to_cpu(pp->crpb[out_index].flags); + if (unlikely(status & 0xff)) { + mv_err_intr(ap, qc); + return; + } + + /* and finally, complete the ATA command */ + if (qc) { + qc->err_mask |= + ac_err_mask(status >> CRPB_FLAG_STATUS_SHIFT); + ata_qc_complete(qc); + } + + /* advance software response queue pointer, to + * indicate (after the loop completes) to hardware + * that we have consumed a response queue entry. + */ + work_done = true; + pp->resp_idx++; + } + + if (work_done) + writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | + (out_index << EDMA_RSP_Q_PTR_SHIFT), + port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); } /** @@ -1428,11 +1570,8 @@ static void mv_host_intr(struct ata_host *host, u32 relevant, unsigned int hc) { void __iomem *mmio = host->iomap[MV_PRIMARY_BAR]; void __iomem *hc_mmio = mv_hc_base(mmio, hc); - struct ata_queued_cmd *qc; u32 hc_irq_cause; int port, port0; - int shift, hard_port, handled; - unsigned int err_mask; if (hc == 0) port0 = 0; @@ -1441,72 +1580,89 @@ static void mv_host_intr(struct ata_host *host, u32 relevant, unsigned int hc) /* we'll need the HC success int register in most cases */ hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS); - if (hc_irq_cause) - writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS); + if (!hc_irq_cause) + return; + + writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS); VPRINTK("ENTER, hc%u relevant=0x%08x HC IRQ cause=0x%08x\n", hc,relevant,hc_irq_cause); for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) { - u8 ata_status = 0; struct ata_port *ap = host->ports[port]; struct mv_port_priv *pp = ap->private_data; + int have_err_bits, hard_port, shift; + + if ((!ap) || (ap->flags & ATA_FLAG_DISABLED)) + continue; + + shift = port << 1; /* (port * 2) */ + if (port >= MV_PORTS_PER_HC) { + shift++; /* skip bit 8 in the HC Main IRQ reg */ + } + have_err_bits = ((PORT0_ERR << shift) & relevant); + + if (unlikely(have_err_bits)) { + struct ata_queued_cmd *qc; + + qc = ata_qc_from_tag(ap, ap->active_tag); + if (qc && (qc->tf.flags & ATA_TFLAG_POLLING)) + continue; + + mv_err_intr(ap, qc); + continue; + } hard_port = mv_hardport_from_port(port); /* range 0..3 */ - handled = 0; /* ensure ata_status is set if handled++ */ - /* Note that DEV_IRQ might happen spuriously during EDMA, - * and should be ignored in such cases. - * The cause of this is still under investigation. - */ if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) { - /* EDMA: check for response queue interrupt */ - if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) { - ata_status = mv_get_crpb_status(ap); - handled = 1; - } + if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) + mv_intr_edma(ap); } else { - /* PIO: check for device (drive) interrupt */ - if ((DEV_IRQ << hard_port) & hc_irq_cause) { - ata_status = readb(ap->ioaddr.status_addr); - handled = 1; - /* ignore spurious intr if drive still BUSY */ - if (ata_status & ATA_BUSY) { - ata_status = 0; - handled = 0; - } - } + if ((DEV_IRQ << hard_port) & hc_irq_cause) + mv_intr_pio(ap); } + } + VPRINTK("EXIT\n"); +} - if (ap && (ap->flags & ATA_FLAG_DISABLED)) - continue; +static void mv_pci_error(struct ata_host *host, void __iomem *mmio) +{ + struct ata_port *ap; + struct ata_queued_cmd *qc; + struct ata_eh_info *ehi; + unsigned int i, err_mask, printed = 0; + u32 err_cause; - err_mask = ac_err_mask(ata_status); + err_cause = readl(mmio + PCI_IRQ_CAUSE_OFS); - shift = port << 1; /* (port * 2) */ - if (port >= MV_PORTS_PER_HC) { - shift++; /* skip bit 8 in the HC Main IRQ reg */ - } - if ((PORT0_ERR << shift) & relevant) { - mv_err_intr(ap, 1); - err_mask |= AC_ERR_OTHER; - handled = 1; - } + dev_printk(KERN_ERR, host->dev, "PCI ERROR; PCI IRQ cause=0x%08x\n", + err_cause); - if (handled) { + DPRINTK("All regs @ PCI error\n"); + mv_dump_all_regs(mmio, -1, to_pci_dev(host->dev)); + + writelfl(0, mmio + PCI_IRQ_CAUSE_OFS); + + for (i = 0; i < host->n_ports; i++) { + ap = host->ports[i]; + if (!ata_port_offline(ap)) { + ehi = &ap->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); - if (qc && (qc->flags & ATA_QCFLAG_ACTIVE)) { - VPRINTK("port %u IRQ found for qc, " - "ata_status 0x%x\n", port,ata_status); - /* mark qc status appropriately */ - if (!(qc->tf.flags & ATA_TFLAG_POLLING)) { - qc->err_mask |= err_mask; - ata_qc_complete(qc); - } - } + if (qc) + qc->err_mask |= err_mask; + else + ehi->err_mask |= err_mask; + + ata_port_freeze(ap); } } - VPRINTK("EXIT\n"); } /** @@ -1541,24 +1697,21 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance) n_hcs = mv_get_hc_count(host->ports[0]->flags); spin_lock(&host->lock); + if (unlikely(irq_stat & PCI_ERR)) { + mv_pci_error(host, mmio); + handled = 1; + goto out_unlock; /* skip all other HC irq handling */ + } + for (hc = 0; hc < n_hcs; hc++) { u32 relevant = irq_stat & (HC0_IRQ_PEND << (hc * HC_SHIFT)); if (relevant) { mv_host_intr(host, relevant, hc); - handled++; + handled = 1; } } - if (PCI_ERR & irq_stat) { - printk(KERN_ERR DRV_NAME ": PCI ERROR; PCI IRQ cause=0x%08x\n", - readl(mmio + PCI_IRQ_CAUSE_OFS)); - - DPRINTK("All regs @ PCI error\n"); - mv_dump_all_regs(mmio, -1, to_pci_dev(host->dev)); - - writelfl(0, mmio + PCI_IRQ_CAUSE_OFS); - handled++; - } +out_unlock: spin_unlock(&host->lock); return IRQ_RETVAL(handled); @@ -1967,28 +2120,8 @@ static void mv_channel_reset(struct mv_host_priv *hpriv, void __iomem *mmio, mdelay(1); } -static void mv_stop_and_reset(struct ata_port *ap) -{ - struct mv_host_priv *hpriv = ap->host->private_data; - void __iomem *mmio = ap->host->iomap[MV_PRIMARY_BAR]; - - mv_stop_dma(ap); - - mv_channel_reset(hpriv, mmio, ap->port_no); - - __mv_phy_reset(ap, 0); -} - -static inline void __msleep(unsigned int msec, int can_sleep) -{ - if (can_sleep) - msleep(msec); - else - mdelay(msec); -} - /** - * __mv_phy_reset - Perform eDMA reset followed by COMRESET + * mv_phy_reset - Perform eDMA reset followed by COMRESET * @ap: ATA channel to manipulate * * Part of this is taken from __sata_phy_reset and modified to @@ -1998,14 +2131,12 @@ static inline void __msleep(unsigned int msec, int can_sleep) * Inherited from caller. This is coded to safe to call at * interrupt level, i.e. it does not sleep. */ -static void __mv_phy_reset(struct ata_port *ap, int can_sleep) +static void mv_phy_reset(struct ata_port *ap, unsigned int *class, + unsigned long deadline) { struct mv_port_priv *pp = ap->private_data; struct mv_host_priv *hpriv = ap->host->private_data; void __iomem *port_mmio = mv_ap_base(ap); - struct ata_taskfile tf; - struct ata_device *dev = &ap->device[0]; - unsigned long deadline; int retry = 5; u32 sstatus; @@ -2018,18 +2149,17 @@ static void __mv_phy_reset(struct ata_port *ap, int can_sleep) /* Issue COMRESET via SControl */ comreset_retry: sata_scr_write_flush(ap, SCR_CONTROL, 0x301); - __msleep(1, can_sleep); + msleep(1); sata_scr_write_flush(ap, SCR_CONTROL, 0x300); - __msleep(20, can_sleep); + msleep(20); - deadline = jiffies + msecs_to_jiffies(200); do { sata_scr_read(ap, SCR_STATUS, &sstatus); if (((sstatus & 0x3) == 3) || ((sstatus & 0x3) == 0)) break; - __msleep(1, can_sleep); + msleep(1); } while (time_before(jiffies, deadline)); /* work around errata */ @@ -2042,13 +2172,8 @@ comreset_retry: "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS), mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL)); - if (ata_port_online(ap)) { - ata_port_probe(ap); - } else { - sata_scr_read(ap, SCR_STATUS, &sstatus); - ata_port_printk(ap, KERN_INFO, - "no device found (phy stat %08x)\n", sstatus); - ata_port_disable(ap); + if (ata_port_offline(ap)) { + *class = ATA_DEV_NONE; return; } @@ -2062,68 +2187,152 @@ comreset_retry: u8 drv_stat = ata_check_status(ap); if ((drv_stat != 0x80) && (drv_stat != 0x7f)) break; - __msleep(500, can_sleep); + msleep(500); if (retry-- <= 0) break; + if (time_after(jiffies, deadline)) + break; } - tf.lbah = readb(ap->ioaddr.lbah_addr); - tf.lbam = readb(ap->ioaddr.lbam_addr); - tf.lbal = readb(ap->ioaddr.lbal_addr); - tf.nsect = readb(ap->ioaddr.nsect_addr); + /* FIXME: if we passed the deadline, the following + * code probably produces an invalid result + */ - dev->class = ata_dev_classify(&tf); - if (!ata_dev_enabled(dev)) { - VPRINTK("Port disabled post-sig: No device present.\n"); - ata_port_disable(ap); - } + /* finally, read device signature from TF registers */ + *class = ata_dev_try_classify(ap, 0, NULL); writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); - pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; + WARN_ON(pp->pp_flags & MV_PP_FLAG_EDMA_EN); VPRINTK("EXIT\n"); } -static void mv_phy_reset(struct ata_port *ap) +static int mv_prereset(struct ata_port *ap, unsigned long deadline) { - __mv_phy_reset(ap, 1); + 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; + + if (!(pp->pp_flags & MV_PP_FLAG_HAD_A_RESET)) { + pp->pp_flags |= MV_PP_FLAG_HAD_A_RESET; + 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; + + if (ata_port_online(ap)) + rc = ata_wait_ready(ap, deadline); + else + rc = -ENODEV; + + return rc; } -/** - * mv_eng_timeout - Routine called by libata when SCSI times out I/O - * @ap: ATA channel to manipulate - * - * Intent is to clear all pending error conditions, reset the - * chip/bus, fail the command, and move on. - * - * LOCKING: - * This routine holds the host lock while failing the command. - */ -static void mv_eng_timeout(struct ata_port *ap) +static int mv_hardreset(struct ata_port *ap, unsigned int *class, + unsigned long deadline) { + struct mv_host_priv *hpriv = ap->host->private_data; void __iomem *mmio = ap->host->iomap[MV_PRIMARY_BAR]; - struct ata_queued_cmd *qc; - unsigned long flags; - ata_port_printk(ap, KERN_ERR, "Entering mv_eng_timeout\n"); - DPRINTK("All regs @ start of eng_timeout\n"); - mv_dump_all_regs(mmio, ap->port_no, to_pci_dev(ap->host->dev)); + mv_stop_dma(ap); - qc = ata_qc_from_tag(ap, ap->active_tag); - printk(KERN_ERR "mmio_base %p ap %p qc %p scsi_cmnd %p &cmnd %p\n", - mmio, ap, qc, qc->scsicmd, &qc->scsicmd->cmnd); + mv_channel_reset(hpriv, mmio, ap->port_no); - spin_lock_irqsave(&ap->host->lock, flags); - mv_err_intr(ap, 0); - mv_stop_and_reset(ap); - spin_unlock_irqrestore(&ap->host->lock, flags); + mv_phy_reset(ap, class, deadline); + + return 0; +} + +static void mv_postreset(struct ata_port *ap, unsigned int *classes) +{ + u32 serr; + + /* print link status */ + sata_print_link_status(ap); + + /* clear SError */ + sata_scr_read(ap, SCR_ERROR, &serr); + sata_scr_write_flush(ap, SCR_ERROR, serr); + + /* bail out if no device is present */ + if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { + DPRINTK("EXIT, no device\n"); + return; + } + + /* set up device control */ + iowrite8(ap->ctl, ap->ioaddr.ctl_addr); +} + +static void mv_error_handler(struct ata_port *ap) +{ + ata_do_eh(ap, mv_prereset, ata_std_softreset, + mv_hardreset, mv_postreset); +} + +static void mv_post_int_cmd(struct ata_queued_cmd *qc) +{ + mv_stop_dma(qc->ap); +} + +static void mv_eh_freeze(struct ata_port *ap) +{ + void __iomem *mmio = ap->host->iomap[MV_PRIMARY_BAR]; + unsigned int hc = (ap->port_no > 3) ? 1 : 0; + u32 tmp, mask; + unsigned int shift; + + /* FIXME: handle coalescing completion events properly */ + + shift = ap->port_no * 2; + if (hc > 0) + shift++; - WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); - if (qc->flags & ATA_QCFLAG_ACTIVE) { - qc->err_mask |= AC_ERR_TIMEOUT; - ata_eh_qc_complete(qc); + mask = 0x3 << shift; + + /* disable assertion of portN err, done events */ + tmp = readl(mmio + HC_MAIN_IRQ_MASK_OFS); + writelfl(tmp & ~mask, mmio + HC_MAIN_IRQ_MASK_OFS); +} + +static void mv_eh_thaw(struct ata_port *ap) +{ + void __iomem *mmio = ap->host->iomap[MV_PRIMARY_BAR]; + unsigned int hc = (ap->port_no > 3) ? 1 : 0; + void __iomem *hc_mmio = mv_hc_base(mmio, hc); + void __iomem *port_mmio = mv_ap_base(ap); + u32 tmp, mask, hc_irq_cause; + unsigned int shift, hc_port_no = ap->port_no; + + /* FIXME: handle coalescing completion events properly */ + + shift = ap->port_no * 2; + if (hc > 0) { + shift++; + hc_port_no -= 4; } + + mask = 0x3 << shift; + + /* clear EDMA errors on this port */ + writel(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); + + /* clear pending irq events */ + hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS); + hc_irq_cause &= ~(1 << hc_port_no); /* clear CRPB-done */ + hc_irq_cause &= ~(1 << (hc_port_no + 8)); /* clear Device int */ + writel(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS); + + /* enable assertion of portN err, done events */ + tmp = readl(mmio + HC_MAIN_IRQ_MASK_OFS); + writelfl(tmp | mask, mmio + HC_MAIN_IRQ_MASK_OFS); } /** |