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[PATCH 08/15] libata-ncq: update EH to handle NCQ | |
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* ata_eh_determine_qc() is updated to take log page 10h into account
to determine which qc has failed and obtain its TF.
* ata_eh_report() is updated to report ap->sactive.
* ata_eh_finish_qcs() is updated to finish all aborted NCQ commands.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/scsi/ahci.c | 2 +
drivers/scsi/libata-bmdma.c | 2 +
drivers/scsi/libata-eh.c | 79 +++++++++++++++++++++++++++++++++++++++++--
drivers/scsi/sata_sil24.c | 2 +
include/linux/libata.h | 1 +
5 files changed, 80 insertions(+), 6 deletions(-)
80d986bf527942c9a6188b258b15e2f5667678ff
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 67950ee..f3d117e 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -845,7 +845,7 @@ static void ahci_error_handler(struct at
/* perform recovery */
action |= ahci_eh_autopsy(ap, irq_stat, &err_mask, desc, sizeof(desc));
- qc = ata_eh_determine_qc(ap, &tf);
+ qc = ata_eh_determine_qc(ap, 0, &tf);
if (qc)
qc->err_mask |= err_mask;
diff --git a/drivers/scsi/libata-bmdma.c b/drivers/scsi/libata-bmdma.c
index 6e48ce5..3c3bc71 100644
--- a/drivers/scsi/libata-bmdma.c
+++ b/drivers/scsi/libata-bmdma.c
@@ -700,7 +700,7 @@ void ata_bmdma_drive_eh(struct ata_port
struct ata_taskfile tf;
u32 serror;
- qc = ata_eh_determine_qc(ap, &tf);
+ qc = ata_eh_determine_qc(ap, 0, &tf);
/* reset PIO HSM and stop DMA engine */
spin_lock_irqsave(&host_set->lock, flags);
diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 795f580..1a87bce 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -669,6 +669,7 @@ static int ata_eh_read_log_10h(struct at
/**
* ata_eh_determine_qc - Determine which qc caused error
* @ap: port which failed
+ * @use_log_10h: use log page 10h result
* @tf: resulting taskfile registers of the failed command
*
* Determine which qc caused failure and read associated tf
@@ -681,12 +682,65 @@ static int ata_eh_read_log_10h(struct at
* Pointer to the failed qc.
*/
struct ata_queued_cmd * ata_eh_determine_qc(struct ata_port *ap,
+ int use_log_10h,
struct ata_taskfile *tf)
{
+ struct ata_queued_cmd *first_qc, *qc;
+ struct ata_device *dev;
+ struct ata_taskfile tmp_tf;
+ unsigned int tag;
+ int rc;
+
memset(tf, 0, sizeof(*tf));
ap->ops->tf_read(ap, tf);
- return __ata_qc_from_tag(ap, ap->active_tag);
+ qc = __ata_qc_from_tag(ap, ap->active_tag);
+ if (qc)
+ return qc;
+
+ if (!ap->sactive)
+ return NULL;
+
+ /* NCQ. Assume the first device. */
+ dev = &ap->device[0];
+
+ /* Find the first active qc with error. If no qc is
+ * explicitly marked with error, use the first active qc.
+ */
+ first_qc = NULL;
+ for (tag = 0; tag < ATA_MAX_QUEUE; tag++) {
+ qc = __ata_qc_from_tag(ap, tag);
+ if (qc->flags & ATA_QCFLAG_ACTIVE) {
+ if (!first_qc)
+ first_qc = qc;
+ if (qc->err_mask)
+ break;
+ }
+ }
+ if (tag == ATA_MAX_QUEUE)
+ qc = first_qc;
+
+ /* Always read log page 10h to unjam the device but use the
+ * result only if use_log_10h is non-zero.
+ */
+ rc = ata_eh_read_log_10h(ap, dev, &tag, &tmp_tf);
+ if (rc || !(ap->sactive & (1 << tag))) {
+ if (rc == 0)
+ rc = -ENOENT;
+ printk(KERN_ERR "ata%u: failed to read log page 10h (errno=%d)\n",
+ ap->id, rc);
+ qc->err_mask &= ~AC_ERR_DEV;
+ qc->err_mask |= AC_ERR_OTHER;
+ }
+ DPRINTK("ata%u: rc=%d emask=0x%x tag=%d stat=0x%x err=0x%x\n",
+ ap->id, rc, qc->err_mask, tag, tmp_tf.command, tmp_tf.feature);
+
+ if (use_log_10h) {
+ qc = __ata_qc_from_tag(ap, tag);
+ memcpy(tf, &tmp_tf, sizeof(*tf));
+ }
+
+ return qc;
}
/**
@@ -1018,11 +1072,11 @@ void ata_eh_report(struct ata_port *ap,
printk(KERN_ERR
"ata%u: dev %u command 0x%x tag %u failed with %s\n"
- " Emask 0x%x stat 0x%x err 0x%x SErr 0x%x action 0x%x\n"
+ " Emask 0x%x stat 0x%x err 0x%x SAct 0x%x SErr 0x%x action 0x%x\n"
"%s%s%s",
ap->id, qc->dev->devno, qc->tf.command, qc->tag,
ata_err_string(qc->err_mask), qc->err_mask,
- tf->command, tf->feature, serror, action,
+ tf->command, tf->feature, ap->sactive, serror, action,
desc_head, desc, desc_tail);
}
@@ -1247,7 +1301,9 @@ void ata_eh_finish_qcs(struct ata_port *
struct ata_taskfile *tf)
{
struct ata_taskfile tmp_tf;
+ int i;
+ /* first, the failed qc */
if (qc) {
/* prevent infinite retry loop */
if (!qc->err_mask && !(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
@@ -1275,4 +1331,21 @@ void ata_eh_finish_qcs(struct ata_port *
else
ata_eh_qc_retry(qc);
}
+
+ /* and, victimized NCQ commands */
+
+ /* feed zero TF to sense generation */
+ memset(&tmp_tf, 0, sizeof(tmp_tf));
+
+ for (i = 0; i < ATA_MAX_QUEUE; i++) {
+ qc = __ata_qc_from_tag(ap, i);
+ if (qc->flags & ATA_QCFLAG_ACTIVE) {
+ tmp_tf.flags = qc->tf.flags;
+ tmp_tf.protocol = qc->tf.protocol;
+ tmp_tf.ctl = qc->tf.ctl;
+ qc->tf = tmp_tf;
+
+ ata_eh_qc_retry(qc);
+ }
+ }
}
diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index bbbc18a..c2c5ed9 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -821,7 +821,7 @@ static void sil24_error_handler(struct a
/* perform recovery */
action |= sil24_eh_autopsy(ap, irq_stat, &err_mask, desc, sizeof(desc));
- qc = ata_eh_determine_qc(ap, &tf);
+ qc = ata_eh_determine_qc(ap, 0, &tf);
if (qc)
qc->err_mask |= err_mask;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index b194f3f..d463156 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -700,6 +700,7 @@ extern void ata_eh_schedule_port(struct
extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
extern struct ata_queued_cmd * ata_eh_determine_qc(struct ata_port *ap,
+ int use_log_10h,
struct ata_taskfile *tf);
extern unsigned int ata_eh_autopsy(struct ata_port *ap,
struct ata_queued_cmd *qc,
--
1.2.4
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