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Message-ID: <20070526234922.GA14434@havoc.gtf.org>
Date: Sat, 26 May 2007 19:49:22 -0400
From: Jeff Garzik <jeff@...zik.org>
To: linux-ide@...r.kernel.org
Cc: LKML <linux-kernel@...r.kernel.org>, liml@....ca
Subject: [PATCH] convert sata_qstor to new libata EH
This patch is an attempt to convert sata_qstor over to new EH.
It compiles, but I have not tested it. If anyone is willing to give
it an "it talks to the disks" test that would be great.
This is checked into the 'new-eh' branch of libata. Review requested.
drivers/ata/sata_qstor.c | 65 +++++++++++++++++++++++++++++++++--------------
1 file changed, 47 insertions(+), 18 deletions(-)
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 6688ccb..76ab39e 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -116,14 +116,15 @@ static void 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);
-static void qs_phy_reset(struct ata_port *ap);
static void qs_qc_prep(struct ata_queued_cmd *qc);
static unsigned int qs_qc_issue(struct ata_queued_cmd *qc);
static int qs_check_atapi_dma(struct ata_queued_cmd *qc);
static void qs_bmdma_stop(struct ata_queued_cmd *qc);
static u8 qs_bmdma_status(struct ata_port *ap);
static void qs_irq_clear(struct ata_port *ap);
-static void qs_eng_timeout(struct ata_port *ap);
+static void qs_freeze(struct ata_port *ap);
+static void qs_thaw(struct ata_port *ap);
+static void qs_error_handler(struct ata_port *ap);
static struct scsi_host_template qs_ata_sht = {
.module = THIS_MODULE,
@@ -152,11 +153,12 @@ static const struct ata_port_operations qs_ata_ops = {
.check_atapi_dma = qs_check_atapi_dma,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
- .phy_reset = qs_phy_reset,
.qc_prep = qs_qc_prep,
.qc_issue = qs_qc_issue,
.data_xfer = ata_data_xfer,
- .eng_timeout = qs_eng_timeout,
+ .freeze = qs_freeze,
+ .thaw = qs_thaw,
+ .error_handler = qs_error_handler,
.irq_clear = qs_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
@@ -172,8 +174,6 @@ static const struct ata_port_info qs_port_info[] = {
/* board_2068_idx */
{
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
- ATA_FLAG_SATA_RESET |
- //FIXME ATA_FLAG_SRST |
ATA_FLAG_MMIO | ATA_FLAG_PIO_POLLING,
.pio_mask = 0x10, /* pio4 */
.udma_mask = 0x7f, /* udma0-6 */
@@ -236,23 +236,35 @@ static inline void qs_reset_channel_logic(struct ata_port *ap)
qs_enter_reg_mode(ap);
}
-static void qs_phy_reset(struct ata_port *ap)
+static void qs_freeze(struct ata_port *ap)
{
- struct qs_port_priv *pp = ap->private_data;
+ u8 __iomem *mmio_base = qs_mmio_base(ap->host);
- pp->state = qs_state_idle;
- qs_reset_channel_logic(ap);
- sata_phy_reset(ap);
+ writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
+}
+
+static void qs_thaw(struct ata_port *ap)
+{
+ u8 __iomem *mmio_base = qs_mmio_base(ap->host);
+
+ writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */
}
-static void qs_eng_timeout(struct ata_port *ap)
+static int qs_prereset(struct ata_port *ap, unsigned long deadline)
{
struct qs_port_priv *pp = ap->private_data;
if (pp->state != qs_state_idle) /* healthy paranoia */
pp->state = qs_state_mmio;
qs_reset_channel_logic(ap);
- ata_eng_timeout(ap);
+
+ return ata_std_prereset(ap, deadline);
+}
+
+static void qs_error_handler(struct ata_port *ap)
+{
+ ata_do_eh(ap, qs_prereset, ata_std_softreset, NULL,
+ ata_std_postreset);
}
static u32 qs_scr_read (struct ata_port *ap, unsigned int sc_reg)
@@ -359,7 +371,6 @@ static unsigned int qs_qc_issue(struct ata_queued_cmd *qc)
switch (qc->tf.protocol) {
case ATA_PROT_DMA:
-
pp->state = qs_state_pkt;
qs_packet_start(qc);
return 0;
@@ -376,6 +387,26 @@ static unsigned int qs_qc_issue(struct ata_queued_cmd *qc)
return ata_qc_issue_prot(qc);
}
+static void qs_do_or_die(struct ata_queued_cmd *qc, u8 status)
+{
+ qc->err_mask |= ac_err_mask(status);
+
+ if (!qc->err_mask)
+ ata_qc_complete(qc);
+ else {
+ struct ata_port *ap = qc->ap;
+ 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);
+ }
+}
+
static inline unsigned int qs_intr_pkt(struct ata_host *host)
{
unsigned int handled = 0;
@@ -409,8 +440,7 @@ static inline unsigned int qs_intr_pkt(struct ata_host *host)
case 3: /* device error */
pp->state = qs_state_idle;
qs_enter_reg_mode(qc->ap);
- qc->err_mask |= ac_err_mask(sDST);
- ata_qc_complete(qc);
+ qs_do_or_die(qc, sDST);
break;
default:
break;
@@ -447,8 +477,7 @@ static inline unsigned int qs_intr_mmio(struct ata_host *host)
/* complete taskfile transaction */
pp->state = qs_state_idle;
- qc->err_mask |= ac_err_mask(status);
- ata_qc_complete(qc);
+ qs_do_or_die(qc, status);
handled = 1;
}
}
-
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