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Message-ID: <20070711200538.GA7374@havoc.gtf.org>
Date: Wed, 11 Jul 2007 16:05:38 -0400
From: Jeff Garzik <jeff@...zik.org>
To: linux-ide@...r.kernel.org
Cc: LKML <linux-kernel@...r.kernel.org>, dean@...tic.org,
dave@...dillows.org
Subject: [RFT][PATCH v7] sata_mv: convert to new EH
As before, this patch is against 2.6.22 with no other patches needed nor
applied.
In this revision, interrupt handling was improved quite a bit,
particularly for EDMA. The WARNING in mv_get_crpb_status() goes away,
because that routine went away. Its EDMA handling was potentially racy
as well. It was replaced with a loop in mv_intr_edma() that guarantees
it always clears responses out of the queue, not a single response.
Here's hoping that the WARNING in mv_qc_issue() goes away as well, but I
am less than 50% confident that will happen.
The driver is making substantial progress with all these improvements,
though, in searching for the cause of this hardware behavior :)
Though if mv_qc_issue() still warns, I would be interested to know if
this driver works OK if the mv_qc_issue() warning is simply removed at
that point...
diff -ur linux-2.6.22/drivers/ata/sata_mv.c linux-2.6.22-mv/drivers/ata/sata_mv.c
--- linux-2.6.22/drivers/ata/sata_mv.c 2007-07-08 19:32:17.000000000 -0400
+++ linux-2.6.22-mv/drivers/ata/sata_mv.c 2007-07-11 15:39:18.000000000 -0400
@@ -79,7 +79,7 @@
#include <linux/libata.h>
#define DRV_NAME "sata_mv"
-#define DRV_VERSION "0.81"
+#define DRV_VERSION "0.81hack7"
enum {
/* BAR's are enumerated in terms of pci_resource_start() terms */
@@ -140,11 +140,14 @@
CRQB_FLAG_READ = (1 << 0),
CRQB_TAG_SHIFT = 1,
+ CRQB_IOID_SHIFT = 6, /* CRQB Gen-II/IIE IO Id shift */
CRQB_CMD_ADDR_SHIFT = 8,
CRQB_CMD_CS = (0x2 << 11),
CRQB_CMD_LAST = (1 << 15),
CRPB_FLAG_STATUS_SHIFT = 8,
+ CRPB_IOID_SHIFT_6 = 5, /* CRPB Gen-II IO Id shift */
+ CRPB_IOID_SHIFT_7 = 7, /* CRPB Gen-IIE IO Id shift */
EPRD_FLAG_END_OF_TBL = (1 << 31),
@@ -236,8 +239,10 @@
EDMA_ERR_DEV_DCON = (1 << 3),
EDMA_ERR_DEV_CON = (1 << 4),
EDMA_ERR_SERR = (1 << 5),
- EDMA_ERR_SELF_DIS = (1 << 7),
+ 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_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),
@@ -248,13 +253,33 @@
EDMA_ERR_LNK_CTRL_TX = (0x1f << 21),
EDMA_ERR_LNK_DATA_TX = (0x1f << 26),
EDMA_ERR_TRANS_PROTO = (1 << 31),
- 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_ERR_OVERRUN_5 = (1 << 5),
+ EDMA_ERR_UNDERRUN_5 = (1 << 6),
+ 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 */
@@ -288,6 +313,7 @@
/* 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),
};
#define IS_50XX(hpriv) ((hpriv)->hp_flags & MV_HP_50XX)
@@ -352,6 +378,10 @@
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;
};
@@ -384,14 +414,14 @@
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_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,
@@ -415,7 +445,6 @@
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 mv_sht = {
.module = THIS_MODULE,
@@ -444,19 +473,20 @@
.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,
+ .freeze = mv_eh_freeze,
+ .thaw = mv_eh_thaw,
+
.scr_read = mv5_scr_read,
.scr_write = mv5_scr_write,
@@ -473,19 +503,20 @@
.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,
+ .freeze = mv_eh_freeze,
+ .thaw = mv_eh_thaw,
+
.scr_read = mv_scr_read,
.scr_write = mv_scr_write,
@@ -502,19 +533,20 @@
.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,
+ .freeze = mv_eh_freeze,
+ .thaw = mv_eh_thaw,
+
.scr_read = mv_scr_read,
.scr_write = mv_scr_write,
@@ -526,44 +558,44 @@
{ /* chip_504x */
.flags = MV_COMMON_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
- .udma_mask = 0x7f, /* udma0-6 */
+ .udma_mask = ATA_UDMA6,
.port_ops = &mv5_ops,
},
{ /* chip_508x */
.flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC),
.pio_mask = 0x1f, /* pio0-4 */
- .udma_mask = 0x7f, /* udma0-6 */
+ .udma_mask = ATA_UDMA6,
.port_ops = &mv5_ops,
},
{ /* chip_5080 */
.flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC),
.pio_mask = 0x1f, /* pio0-4 */
- .udma_mask = 0x7f, /* udma0-6 */
+ .udma_mask = ATA_UDMA6,
.port_ops = &mv5_ops,
},
{ /* chip_604x */
.flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
.pio_mask = 0x1f, /* pio0-4 */
- .udma_mask = 0x7f, /* udma0-6 */
+ .udma_mask = ATA_UDMA6,
.port_ops = &mv6_ops,
},
{ /* chip_608x */
.flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS |
MV_FLAG_DUAL_HC),
.pio_mask = 0x1f, /* pio0-4 */
- .udma_mask = 0x7f, /* udma0-6 */
+ .udma_mask = ATA_UDMA6,
.port_ops = &mv6_ops,
},
{ /* chip_6042 */
.flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
.pio_mask = 0x1f, /* pio0-4 */
- .udma_mask = 0x7f, /* udma0-6 */
+ .udma_mask = ATA_UDMA6,
.port_ops = &mv_iie_ops,
},
{ /* chip_7042 */
.flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
.pio_mask = 0x1f, /* pio0-4 */
- .udma_mask = 0x7f, /* udma0-6 */
+ .udma_mask = ATA_UDMA6,
.port_ops = &mv_iie_ops,
},
};
@@ -709,6 +741,46 @@
{
}
+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) | index,
+ port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
+
+ if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0)
+ writelfl((pp->crqb_dma & 0xffffffff) | index,
+ port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
+ else
+ 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) | index,
+ port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
+ else
+ writelfl(index, port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
+
+ writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | index,
+ port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
+}
+
/**
* mv_start_dma - Enable eDMA engine
* @base: port base address
@@ -720,9 +792,15 @@
* LOCKING:
* Inherited from caller.
*/
-static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp)
+static void mv_start_dma(void __iomem *base, struct mv_host_priv *hpriv,
+ struct mv_port_priv *pp)
{
- if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) {
+ 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;
}
@@ -739,12 +817,12 @@
* LOCKING:
* Inherited from caller.
*/
-static void 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;
u32 reg;
- int i;
+ int i, err = 0;
if (MV_PP_FLAG_EDMA_EN & pp->pp_flags) {
/* Disable EDMA if active. The disable bit auto clears.
@@ -764,10 +842,12 @@
udelay(100);
}
- if (EDMA_EN & reg) {
+ 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;
}
+
+ return err;
}
#ifdef ATA_DEBUG
@@ -973,26 +1053,7 @@
mv_edma_cfg(hpriv, port_mmio);
- writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI_OFS);
- writelfl(pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK,
- port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
-
- if (hpriv->hp_flags & MV_HP_ERRATA_XX42A0)
- writelfl(pp->crqb_dma & 0xffffffff,
- port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
- else
- writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
-
- 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,
- port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
- else
- writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
-
- writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK,
- port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
+ mv_set_edma_ptrs(port_mmio, hpriv, pp);
/* 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
@@ -1055,11 +1116,6 @@
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 |
@@ -1088,7 +1144,7 @@
u16 flags = 0;
unsigned in_index;
- if (ATA_PROT_DMA != qc->tf.protocol)
+ if (qc->tf.protocol != ATA_PROT_DMA)
return;
/* Fill in command request block
@@ -1097,10 +1153,10 @@
flags |= CRQB_FLAG_READ;
WARN_ON(MV_MAX_Q_DEPTH <= qc->tag);
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);
@@ -1180,7 +1236,7 @@
unsigned in_index;
u32 flags = 0;
- if (ATA_PROT_DMA != qc->tf.protocol)
+ if (qc->tf.protocol != ATA_PROT_DMA)
return;
/* Fill in Gen IIE command request block
@@ -1190,10 +1246,11 @@
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-
+ 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);
@@ -1241,83 +1298,40 @@
*/
static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
{
- void __iomem *port_mmio = mv_ap_base(qc->ap);
- struct mv_port_priv *pp = qc->ap->private_data;
- unsigned in_index;
- u32 in_ptr;
+ struct ata_port *ap = qc->ap;
+ 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;
+ u32 in_index;
- if (ATA_PROT_DMA != qc->tf.protocol) {
+ if (qc->tf.protocol != ATA_PROT_DMA) {
/* We're about to send a non-EDMA capable command to the
* port. Turn off EDMA so there won't be problems accessing
* shadow block, etc registers.
*/
- mv_stop_dma(qc->ap);
+ mv_stop_dma(ap);
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, 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
@@ -1331,30 +1345,192 @@
* 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,
+ unsigned int err_mask)
{
void __iomem *port_mmio = mv_ap_base(ap);
- u32 edma_err_cause, serr = 0;
-
- edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
-
- if (EDMA_ERR_SERR & edma_err_cause) {
+ 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;
+ struct ata_eh_info *ehi = &ap->eh_info;
+
+ ata_ehi_clear_desc(ehi);
+
+ 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, 0);
+ 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);
}
/**
@@ -1377,10 +1553,8 @@
{
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 shift, port, port0, hard_port, handled;
- unsigned int err_mask;
+ int port, port0;
if (hc == 0)
port0 = 0;
@@ -1389,79 +1563,95 @@
/* 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, 0);
+ 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);
+
+ DPRINTK("All regs @ PCI error\n");
+ mv_dump_all_regs(mmio, -1, to_pci_dev(host->dev));
- if (handled) {
+ 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");
}
/**
- * mv_interrupt -
+ * mv_interrupt - Main interrupt event handler
* @irq: unused
* @dev_instance: private data; in this case the host structure
- * @regs: unused
*
* Read the read only register to determine if any host
* controllers have pending interrupts. If so, call lower level
@@ -1477,7 +1667,6 @@
struct ata_host *host = dev_instance;
unsigned int hc, handled = 0, n_hcs;
void __iomem *mmio = host->iomap[MV_PRIMARY_BAR];
- struct mv_host_priv *hpriv;
u32 irq_stat;
irq_stat = readl(mmio + HC_MAIN_IRQ_CAUSE_OFS);
@@ -1491,34 +1680,21 @@
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++;
- }
- }
-
- hpriv = host->private_data;
- if (IS_60XX(hpriv)) {
- /* deal with the interrupt coalescing bits */
- if (irq_stat & (TRAN_LO_DONE | TRAN_HI_DONE | PORTS_0_7_COAL_DONE)) {
- writelfl(0, mmio + MV_IRQ_COAL_CAUSE_LO);
- writelfl(0, mmio + MV_IRQ_COAL_CAUSE_HI);
- writelfl(0, mmio + MV_IRQ_COAL_CAUSE);
+ 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);
@@ -1927,28 +2103,8 @@
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
@@ -1958,14 +2114,12 @@
* 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 timeout;
int retry = 5;
u32 sstatus;
@@ -1978,19 +2132,18 @@
/* 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);
- timeout = 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);
- } while (time_before(jiffies, timeout));
+ msleep(1);
+ } while (time_before(jiffies, deadline));
/* work around errata */
if (IS_60XX(hpriv) &&
@@ -2002,13 +2155,8 @@
"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;
}
@@ -2022,68 +2170,147 @@
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);
-
- dev->class = ata_dev_classify(&tf);
- if (!ata_dev_enabled(dev)) {
- VPRINTK("Port disabled post-sig: No device present.\n");
- ata_port_disable(ap);
- }
+ /* FIXME: if we passed the deadline, the following
+ * code probably produces an invalid result
+ */
+
+ /* 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);
- WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
- if (qc->flags & ATA_QCFLAG_ACTIVE) {
- qc->err_mask |= AC_ERR_TIMEOUT;
- ata_eh_qc_complete(qc);
+ 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_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++;
+
+ 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);
}
/**
@@ -2338,7 +2565,7 @@
struct pci_dev *pdev = to_pci_dev(host->dev);
struct mv_host_priv *hpriv = host->private_data;
u8 rev_id, scc;
- const char *scc_s;
+ const char *scc_s, *gen;
/* Use this to determine the HW stepping of the chip so we know
* what errata to workaround
@@ -2351,11 +2578,20 @@
else if (scc == 0x01)
scc_s = "RAID";
else
- scc_s = "unknown";
+ scc_s = "?";
+
+ if (IS_GEN_I(hpriv))
+ gen = "I";
+ else if (IS_GEN_II(hpriv))
+ gen = "II";
+ else if (IS_GEN_IIE(hpriv))
+ gen = "IIE";
+ else
+ gen = "?";
dev_printk(KERN_INFO, &pdev->dev,
- "%u slots %u ports %s mode IRQ via %s\n",
- (unsigned)MV_MAX_Q_DEPTH, host->n_ports,
+ "Gen-%s %u slots %u ports %s mode IRQ via %s\n",
+ gen, (unsigned)MV_MAX_Q_DEPTH, host->n_ports,
scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx");
}
-
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