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libata sata_qstor conversion to new error handling (EH).

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sata_qstor conversion to new error handling (EH).

Convert sata_qstor to use the newer libata EH mechanisms.
Based on earlier work by Jeff Garzik.

Signed-off-by:  Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Mark Lord 2007-11-07 10:54:15 -05:00 committed by Jeff Garzik
parent 904c7bad99
commit 6004bda1cc
1 changed files with 51 additions and 14 deletions
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65
drivers/ata/sata_qstor.c
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@ -116,14 +116,15 @@ 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);
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,
@ -150,11 +151,12 @@ 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,
.scr_read = qs_scr_read,
@ -169,8 +171,6 @@ 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 = ATA_UDMA6,
@ -235,16 +235,28 @@ 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)
{
qs_reset_channel_logic(ap);
sata_phy_reset(ap);
u8 __iomem *mmio_base = qs_mmio_base(ap->host);
writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
qs_enter_reg_mode(ap);
}
static void qs_eng_timeout(struct ata_port *ap)
static void qs_thaw(struct ata_port *ap)
{
u8 __iomem *mmio_base = qs_mmio_base(ap->host);
qs_enter_reg_mode(ap);
writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */
}
static int qs_prereset(struct ata_link *link, unsigned long deadline)
{
struct ata_port *ap = link->ap;
qs_reset_channel_logic(ap);
ata_eng_timeout(ap);
return ata_std_prereset(link, deadline);
}
static int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
@ -255,6 +267,13 @@ static int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
return 0;
}
static void qs_error_handler(struct ata_port *ap)
{
qs_enter_reg_mode(ap);
ata_do_eh(ap, qs_prereset, ata_std_softreset, NULL,
ata_std_postreset);
}
static int qs_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
{
if (sc_reg > SCR_CONTROL)
@ -353,7 +372,6 @@ 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;
@ -370,6 +388,26 @@ 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->link.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;
@ -402,8 +440,7 @@ static inline unsigned int qs_intr_pkt(struct ata_host *host)
case 0: /* successful CPB */
case 3: /* device error */
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;