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Message-ID: <20070724011404.GA14064@havoc.gtf.org>
Date: Mon, 23 Jul 2007 21:14:04 -0400
From: Jeff Garzik <jeff@...zik.org>
To: linux-ide@...r.kernel.org
Cc: LKML <linux-kernel@...r.kernel.org>, mlord@...ox.com
Subject: [PATCH] sata_qstor, pdc_adma, sata_sx4: convert to new EH
This is just a refresh of the existing libata-dev.git#new-eh patches
that convert all remaining old-EH drivers to new EH, against 2.6.23-rc1.
All three conversions are completely untested. pdc_adma and sata_qstor
need reviewing by someone with docs, in addition to testing.
Even "it still works" or "this patch breaks stuff" feedback from users
is useful.
Jeff
commit 99ad0b4cd2d73815db6370fa6f89d7053ca21016
Author: Jeff Garzik <jeff@...zik.org>
Date: Mon May 28 06:21:45 2007 -0400
[libata] sata_sx4: convert to new EH
Signed-off-by: Jeff Garzik <jeff@...zik.org>
commit 9b105869fb953485ff7e7a8f9bb9f3dcae8aa502
Author: Jeff Garzik <jeff@...zik.org>
Date: Sat May 26 19:48:07 2007 -0400
[libata] sata_qstor: rough draft conversion to new libata EH
Signed-off-by: Jeff Garzik <jeff@...zik.org>
commit 1a9161f86ef2ae955267c78f1c16273cad4fdbb4
Author: Jeff Garzik <jeff@...zik.org>
Date: Fri Jul 6 19:28:32 2007 -0400
[libata] pdc_adma: rough draft conversion to new-EH
Signed-off-by: Jeff Garzik <jeff@...zik.org>
drivers/ata/pdc_adma.c | 82 ++++++++++++++++++++++++++++++++--------
drivers/ata/sata_qstor.c | 65 +++++++++++++++++++++++--------
drivers/ata/sata_sx4.c | 96 +++++++++++++++++++++++++++++------------------
3 files changed, 174 insertions(+), 69 deletions(-)
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index bec1de5..bf4dba0 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -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);
+
+ /* 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);
+}
- pp->state = adma_state_idle;
+static void adma_thaw(struct ata_port *ap)
+{
adma_reinit_engine(ap);
- ata_port_probe(ap);
- ata_bus_reset(ap);
}
-static void adma_eng_timeout(struct ata_port *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;
- ata_qc_complete(qc);
+ 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);
- ata_qc_complete(qc);
+ 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;
}
}
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index c8f9242..15ded71 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -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,
@@ -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 = ATA_UDMA6,
@@ -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 int qs_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
@@ -361,7 +373,6 @@ 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;
@@ -378,6 +389,26 @@ 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;
@@ -411,8 +442,7 @@ 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;
@@ -449,8 +479,7 @@ 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;
}
}
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 5193bd8..c4cdf95 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -213,8 +213,9 @@ struct pdc_host_priv {
static int pdc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
-static void pdc_eng_timeout(struct ata_port *ap);
-static void pdc_20621_phy_reset (struct ata_port *ap);
+static void pdc_error_handler(struct ata_port *ap);
+static void pdc_freeze(struct ata_port *ap);
+static void pdc_thaw(struct ata_port *ap);
static int pdc_port_start(struct ata_port *ap);
static void pdc20621_qc_prep(struct ata_queued_cmd *qc);
static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
@@ -260,11 +261,12 @@ static const struct ata_port_operations pdc_20621_ops = {
.check_status = ata_check_status,
.exec_command = pdc_exec_command_mmio,
.dev_select = ata_std_dev_select,
- .phy_reset = pdc_20621_phy_reset,
.qc_prep = pdc20621_qc_prep,
.qc_issue = pdc20621_qc_issue_prot,
.data_xfer = ata_data_xfer,
- .eng_timeout = pdc_eng_timeout,
+ .freeze = pdc_freeze,
+ .thaw = pdc_thaw,
+ .error_handler = pdc_error_handler,
.irq_clear = pdc20621_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
@@ -322,14 +324,6 @@ static int pdc_port_start(struct ata_port *ap)
return 0;
}
-static void pdc_20621_phy_reset (struct ata_port *ap)
-{
- VPRINTK("ENTER\n");
- ap->cbl = ATA_CBL_SATA;
- ata_port_probe(ap);
- ata_bus_reset(ap);
-}
-
static inline void pdc20621_ata_sg(struct ata_taskfile *tf, u8 *buf,
unsigned int portno,
unsigned int total_len)
@@ -870,40 +864,70 @@ static irqreturn_t pdc20621_interrupt (int irq, void *dev_instance)
return IRQ_RETVAL(handled);
}
-static void pdc_eng_timeout(struct ata_port *ap)
+static void pdc_freeze(struct ata_port *ap)
{
- u8 drv_stat;
- struct ata_host *host = ap->host;
- struct ata_queued_cmd *qc;
- unsigned long flags;
+ void __iomem *mmio = ap->ioaddr.cmd_addr;
+ u32 tmp;
- DPRINTK("ENTER\n");
+ /* FIXME: this should handle HDMA copy engine freezing */
- spin_lock_irqsave(&host->lock, flags);
+ tmp = readl(mmio + PDC_CTLSTAT);
+ tmp |= PDC_MASK_INT;
+ tmp &= ~PDC_DMA_ENABLE;
+ writel(tmp, mmio + PDC_CTLSTAT);
+ readl(mmio + PDC_CTLSTAT); /* flush */
+}
- qc = ata_qc_from_tag(ap, ap->active_tag);
+static void pdc_thaw(struct ata_port *ap)
+{
+ void __iomem *mmio = ap->ioaddr.cmd_addr;
+ void __iomem *mmio_base;
+ u32 tmp;
- switch (qc->tf.protocol) {
- case ATA_PROT_DMA:
- case ATA_PROT_NODATA:
- ata_port_printk(ap, KERN_ERR, "command timeout\n");
- qc->err_mask |= __ac_err_mask(ata_wait_idle(ap));
- break;
+ /* FIXME: this should handle HDMA copy engine thawing */
- default:
- drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
+ /* reading SEQ mask register clears IRQ */
+ mmio_base = ap->host->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
+ readl(mmio_base + PDC_20621_SEQMASK);
- ata_port_printk(ap, KERN_ERR,
- "unknown timeout, cmd 0x%x stat 0x%x\n",
- qc->tf.command, drv_stat);
+ /* turn IRQ back on */
+ tmp = readl(mmio + PDC_CTLSTAT);
+ tmp &= ~PDC_MASK_INT;
+ writel(tmp, mmio + PDC_CTLSTAT);
+ readl(mmio + PDC_CTLSTAT); /* flush */
+}
- qc->err_mask |= ac_err_mask(drv_stat);
- break;
+static void pdc_reset_port(struct ata_port *ap)
+{
+ void __iomem *mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT;
+ unsigned int i;
+ u32 tmp;
+
+ /* FIXME: handle HDMA copy engine */
+
+ for (i = 11; i > 0; i--) {
+ tmp = readl(mmio);
+ if (tmp & PDC_RESET)
+ break;
+
+ udelay(100);
+
+ tmp |= PDC_RESET;
+ writel(tmp, mmio);
}
- spin_unlock_irqrestore(&host->lock, flags);
- ata_eh_qc_complete(qc);
- DPRINTK("EXIT\n");
+ tmp &= ~PDC_RESET;
+ writel(tmp, mmio);
+ readl(mmio); /* flush */
+}
+
+static void pdc_error_handler(struct ata_port *ap)
+{
+ if (!(ap->pflags & ATA_PFLAG_FROZEN))
+ pdc_reset_port(ap);
+
+ ata_do_eh(ap, ata_std_prereset, ata_std_softreset, NULL,
+ ata_std_postreset);
}
static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
-
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