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authorHannes Reinecke <hare@suse.de>2015-03-27 16:46:35 +0100
committerTejun Heo <tj@kernel.org>2015-03-27 11:59:22 -0400
commit42b966fbf35da9c87f08d98f9b8978edf9e717cf (patch)
treea7fd32da1b3a746cab71966d42a08aeeb0d7203d /drivers/ata
parent1308d7f0107b264b480e7048dc345fc6b7408e7e (diff)
downloadop-kernel-dev-42b966fbf35da9c87f08d98f9b8978edf9e717cf.zip
op-kernel-dev-42b966fbf35da9c87f08d98f9b8978edf9e717cf.tar.gz
libata: Implement NCQ autosense
Some newer devices support NCQ autosense (cf ACS-4), so we should be using it to retrieve the sense code and speed up recovery. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-eh.c18
-rw-r--r--drivers/ata/libata-scsi.c9
-rw-r--r--drivers/ata/libata.h1
3 files changed, 26 insertions, 2 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 50ffd4e..c9b1994 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1580,6 +1580,8 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
tf->hob_lbah = buf[10];
tf->nsect = buf[12];
tf->hob_nsect = buf[13];
+ if (ata_id_has_ncq_autosense(dev->id))
+ tf->auxiliary = buf[14] << 16 | buf[15] << 8 | buf[16];
return 0;
}
@@ -1777,6 +1779,18 @@ void ata_eh_analyze_ncq_error(struct ata_link *link)
memcpy(&qc->result_tf, &tf, sizeof(tf));
qc->result_tf.flags = ATA_TFLAG_ISADDR | ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
qc->err_mask |= AC_ERR_DEV | AC_ERR_NCQ;
+ if (qc->result_tf.auxiliary) {
+ char sense_key, asc, ascq;
+
+ sense_key = (qc->result_tf.auxiliary >> 16) & 0xff;
+ asc = (qc->result_tf.auxiliary >> 8) & 0xff;
+ ascq = qc->result_tf.auxiliary & 0xff;
+ ata_dev_dbg(dev, "NCQ Autosense %02x/%02x/%02x\n",
+ sense_key, asc, ascq);
+ ata_scsi_set_sense(qc->scsicmd, sense_key, asc, ascq);
+ qc->flags |= ATA_QCFLAG_SENSE_VALID;
+ }
+
ehc->i.err_mask &= ~AC_ERR_DEV;
}
@@ -1806,6 +1820,10 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
return ATA_EH_RESET;
}
+ /* Set by NCQ autosense */
+ if (qc->flags & ATA_QCFLAG_SENSE_VALID)
+ return 0;
+
if (stat & (ATA_ERR | ATA_DF))
qc->err_mask |= AC_ERR_DEV;
else
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index bb57d81..3ac5be3 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -270,8 +270,11 @@ DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
ata_scsi_park_show, ata_scsi_park_store);
EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
-static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
+void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
{
+ if (!cmd)
+ return;
+
cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
@@ -1777,7 +1780,9 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
((cdb[2] & 0x20) || need_sense)) {
ata_gen_passthru_sense(qc);
} else {
- if (!need_sense) {
+ if (qc->flags & ATA_QCFLAG_SENSE_VALID) {
+ cmd->result = SAM_STAT_CHECK_CONDITION;
+ } else if (!need_sense) {
cmd->result = SAM_STAT_GOOD;
} else {
/* TODO: decide which descriptor format to use
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index f840ca1..8cfdd96 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -137,6 +137,7 @@ extern int ata_scsi_add_hosts(struct ata_host *host,
struct scsi_host_template *sht);
extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
extern int ata_scsi_offline_dev(struct ata_device *dev);
+extern void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq);
extern void ata_scsi_media_change_notify(struct ata_device *dev);
extern void ata_scsi_hotplug(struct work_struct *work);
extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
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