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[libata] pdc_adma: convert to new exception handling (EH) framework 

Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Jeff Garzik 2007-08-03 11:10:07 -04:00
parent 782e3b3b38
commit 640fdb5049
1 changed files with 68 additions and 16 deletions
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80
drivers/ata/pdc_adma.c
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@ -92,6 +92,8 @@ enum {
/* CPB bits */
cDONE = (1 << 0),
cATERR = (1 << 3),
cVLD = (1 << 0),
cDAT = (1 << 2),
cIEN = (1 << 3),
@ -131,14 +133,15 @@ static int adma_ata_init_one (struct pci_dev *pdev,
static int adma_port_start(struct ata_port *ap);
static void adma_host_stop(struct ata_host *host);
static void adma_port_stop(struct ata_port *ap);
static void adma_phy_reset(struct ata_port *ap);
static void adma_qc_prep(struct ata_queued_cmd *qc);
static unsigned int adma_qc_issue(struct ata_queued_cmd *qc);
static int adma_check_atapi_dma(struct ata_queued_cmd *qc);
static void adma_bmdma_stop(struct ata_queued_cmd *qc);
static u8 adma_bmdma_status(struct ata_port *ap);
static void adma_irq_clear(struct ata_port *ap);
static void adma_eng_timeout(struct ata_port *ap);
static void adma_freeze(struct ata_port *ap);
static void adma_thaw(struct ata_port *ap);
static void adma_error_handler(struct ata_port *ap);
static struct scsi_host_template adma_ata_sht = {
.module = THIS_MODULE,
@ -165,12 +168,13 @@ static const struct ata_port_operations adma_ata_ops = {
.exec_command = ata_exec_command,
.check_status = ata_check_status,
.dev_select = ata_std_dev_select,
.phy_reset = adma_phy_reset,
.check_atapi_dma = adma_check_atapi_dma,
.data_xfer = ata_data_xfer,
.qc_prep = adma_qc_prep,
.qc_issue = adma_qc_issue,
.eng_timeout = adma_eng_timeout,
.freeze = adma_freeze,
.thaw = adma_thaw,
.error_handler = adma_error_handler,
.irq_clear = adma_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
@ -184,7 +188,7 @@ static const struct ata_port_operations adma_ata_ops = {
static struct ata_port_info adma_port_info[] = {
/* board_1841_idx */
{
.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST |
.flags = ATA_FLAG_SLAVE_POSS |
ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO |
ATA_FLAG_PIO_POLLING,
.pio_mask = 0x10, /* pio4 */
@ -273,24 +277,41 @@ static inline void adma_enter_reg_mode(struct ata_port *ap)
readb(chan + ADMA_STATUS); /* flush */
}
static void adma_phy_reset(struct ata_port *ap)
static void adma_freeze(struct ata_port *ap)
{
struct adma_port_priv *pp = ap->private_data;
void __iomem *chan = ADMA_PORT_REGS(ap);
pp->state = adma_state_idle;
adma_reinit_engine(ap);
ata_port_probe(ap);
ata_bus_reset(ap);
/* mask/clear ATA interrupts */
writeb(ATA_NIEN, ap->ioaddr.ctl_addr);
ata_check_status(ap);
/* reset ADMA to idle state */
writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL);
udelay(2);
writew(aPIOMD4 | aNIEN, chan + ADMA_CONTROL);
udelay(2);
}
static void adma_eng_timeout(struct ata_port *ap)
static void adma_thaw(struct ata_port *ap)
{
adma_reinit_engine(ap);
}
static int adma_prereset(struct ata_port *ap, unsigned long deadline)
{
struct adma_port_priv *pp = ap->private_data;
if (pp->state != adma_state_idle) /* healthy paranoia */
pp->state = adma_state_mmio;
adma_reinit_engine(ap);
ata_eng_timeout(ap);
return ata_std_prereset(ap, deadline);
}
static void adma_error_handler(struct ata_port *ap)
{
ata_do_eh(ap, adma_prereset, ata_std_softreset, NULL,
ata_std_postreset);
}
static int adma_fill_sg(struct ata_queued_cmd *qc)
@ -466,12 +487,31 @@ static inline unsigned int adma_intr_pkt(struct ata_host *host)
continue;
qc = ata_qc_from_tag(ap, ap->active_tag);
if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
if ((status & (aPERR | aPSD | aUIRQ)))
if (status & aPERR)
qc->err_mask |= AC_ERR_HOST_BUS;
else if ((status & (aPSD | aUIRQ)))
qc->err_mask |= AC_ERR_OTHER;
if (pp->pkt[0] & cATERR)
qc->err_mask |= AC_ERR_DEV;
else if (pp->pkt[0] != cDONE)
qc->err_mask |= AC_ERR_OTHER;
if (!qc->err_mask)
ata_qc_complete(qc);
else {
struct ata_eh_info *ehi = &ap->eh_info;
ata_ehi_clear_desc(ehi);
ata_ehi_push_desc(ehi,
"ADMA-status 0x%02X", status);
ata_ehi_push_desc(ehi,
"pkt[0] 0x%02X", pp->pkt[0]);
if (qc->err_mask == AC_ERR_DEV)
ata_port_abort(ap);
else
ata_port_freeze(ap);
}
}
}
return handled;
@ -502,7 +542,19 @@ static inline unsigned int adma_intr_mmio(struct ata_host *host)
/* complete taskfile transaction */
pp->state = adma_state_idle;
qc->err_mask |= ac_err_mask(status);
if (!qc->err_mask)
ata_qc_complete(qc);
else {
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);
}
handled = 1;
}
}