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-rw-r--r--Documentation/ABI/testing/sysfs-block-device22
-rw-r--r--block/bfq-iosched.c8
-rw-r--r--block/blk-core.c3
-rw-r--r--block/ioprio.c6
-rw-r--r--drivers/ata/libata-core.c204
-rw-r--r--drivers/ata/libata-eh.c130
-rw-r--r--drivers/ata/libata-sata.c103
-rw-r--r--drivers/ata/libata-scsi.c384
-rw-r--r--drivers/ata/libata.h2
-rw-r--r--drivers/scsi/scsi.c171
-rw-r--r--drivers/scsi/scsi_error.c48
-rw-r--r--drivers/scsi/scsi_lib.c15
-rw-r--r--drivers/scsi/scsi_priv.h6
-rw-r--r--drivers/scsi/scsi_scan.c3
-rw-r--r--drivers/scsi/scsi_sysfs.c30
-rw-r--r--drivers/scsi/scsi_transport_sas.c2
-rw-r--r--drivers/scsi/sd.c59
-rw-r--r--drivers/scsi/sr.c2
-rw-r--r--include/linux/ata.h11
-rw-r--r--include/linux/blk_types.h6
-rw-r--r--include/linux/libata.h42
-rw-r--r--include/scsi/scsi_cmnd.h5
-rw-r--r--include/scsi/scsi_device.h18
-rw-r--r--include/uapi/linux/ioprio.h68
24 files changed, 1198 insertions, 150 deletions
diff --git a/Documentation/ABI/testing/sysfs-block-device b/Documentation/ABI/testing/sysfs-block-device
index 7ac7b19b2f72..2d543cfa4079 100644
--- a/Documentation/ABI/testing/sysfs-block-device
+++ b/Documentation/ABI/testing/sysfs-block-device
@@ -95,3 +95,25 @@ Description:
This file does not exist if the HBA driver does not implement
support for the SATA NCQ priority feature, regardless of the
device support for this feature.
+
+
+What: /sys/block/*/device/cdl_supported
+Date: May, 2023
+KernelVersion: v6.5
+Contact: linux-scsi@vger.kernel.org
+Description:
+ (RO) Indicates if the device supports the command duration
+ limits feature found in some ATA and SCSI devices.
+
+
+What: /sys/block/*/device/cdl_enable
+Date: May, 2023
+KernelVersion: v6.5
+Contact: linux-scsi@vger.kernel.org
+Description:
+ (RW) For a device supporting the command duration limits
+ feature, write to the file to turn on or off the feature.
+ By default this feature is turned off.
+ Writing "1" to this file enables the use of command duration
+ limits for read and write commands in the kernel and turns on
+ the feature on the device. Writing "0" disables the feature.
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 3164e3177965..3067b75f3fd0 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -5524,16 +5524,16 @@ bfq_set_next_ioprio_data(struct bfq_queue *bfqq, struct bfq_io_cq *bic)
bfqq->new_ioprio_class = task_nice_ioclass(tsk);
break;
case IOPRIO_CLASS_RT:
- bfqq->new_ioprio = IOPRIO_PRIO_DATA(bic->ioprio);
+ bfqq->new_ioprio = IOPRIO_PRIO_LEVEL(bic->ioprio);
bfqq->new_ioprio_class = IOPRIO_CLASS_RT;
break;
case IOPRIO_CLASS_BE:
- bfqq->new_ioprio = IOPRIO_PRIO_DATA(bic->ioprio);
+ bfqq->new_ioprio = IOPRIO_PRIO_LEVEL(bic->ioprio);
bfqq->new_ioprio_class = IOPRIO_CLASS_BE;
break;
case IOPRIO_CLASS_IDLE:
bfqq->new_ioprio_class = IOPRIO_CLASS_IDLE;
- bfqq->new_ioprio = 7;
+ bfqq->new_ioprio = IOPRIO_NR_LEVELS - 1;
break;
}
@@ -5830,7 +5830,7 @@ static struct bfq_queue *bfq_get_queue(struct bfq_data *bfqd,
struct bfq_io_cq *bic,
bool respawn)
{
- const int ioprio = IOPRIO_PRIO_DATA(bic->ioprio);
+ const int ioprio = IOPRIO_PRIO_LEVEL(bic->ioprio);
const int ioprio_class = IOPRIO_PRIO_CLASS(bic->ioprio);
struct bfq_queue **async_bfqq = NULL;
struct bfq_queue *bfqq;
diff --git a/block/blk-core.c b/block/blk-core.c
index a72cb93f583c..420458c3a3cb 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -170,6 +170,9 @@ static const struct {
[BLK_STS_ZONE_OPEN_RESOURCE] = { -ETOOMANYREFS, "open zones exceeded" },
[BLK_STS_ZONE_ACTIVE_RESOURCE] = { -EOVERFLOW, "active zones exceeded" },
+ /* Command duration limit device-side timeout */
+ [BLK_STS_DURATION_LIMIT] = { -ETIME, "duration limit exceeded" },
+
/* everything else not covered above: */
[BLK_STS_IOERR] = { -EIO, "I/O" },
};
diff --git a/block/ioprio.c b/block/ioprio.c
index 32a456b45804..f0d9e818abc5 100644
--- a/block/ioprio.c
+++ b/block/ioprio.c
@@ -33,7 +33,7 @@
int ioprio_check_cap(int ioprio)
{
int class = IOPRIO_PRIO_CLASS(ioprio);
- int data = IOPRIO_PRIO_DATA(ioprio);
+ int level = IOPRIO_PRIO_LEVEL(ioprio);
switch (class) {
case IOPRIO_CLASS_RT:
@@ -49,13 +49,13 @@ int ioprio_check_cap(int ioprio)
fallthrough;
/* rt has prio field too */
case IOPRIO_CLASS_BE:
- if (data >= IOPRIO_NR_LEVELS || data < 0)
+ if (level >= IOPRIO_NR_LEVELS)
return -EINVAL;
break;
case IOPRIO_CLASS_IDLE:
break;
case IOPRIO_CLASS_NONE:
- if (data)
+ if (level)
return -EINVAL;
break;
default:
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 8bf612bdd61a..ddc3d9f8fa02 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -665,12 +665,33 @@ u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
return block;
}
+/*
+ * Set a taskfile command duration limit index.
+ */
+static inline void ata_set_tf_cdl(struct ata_queued_cmd *qc, int cdl)
+{
+ struct ata_taskfile *tf = &qc->tf;
+
+ if (tf->protocol == ATA_PROT_NCQ)
+ tf->auxiliary |= cdl;
+ else
+ tf->feature |= cdl;
+
+ /*
+ * Mark this command as having a CDL and request the result
+ * task file so that we can inspect the sense data available
+ * bit on completion.
+ */
+ qc->flags |= ATA_QCFLAG_HAS_CDL | ATA_QCFLAG_RESULT_TF;
+}
+
/**
* ata_build_rw_tf - Build ATA taskfile for given read/write request
* @qc: Metadata associated with the taskfile to build
* @block: Block address
* @n_block: Number of blocks
* @tf_flags: RW/FUA etc...
+ * @cdl: Command duration limit index
* @class: IO priority class
*
* LOCKING:
@@ -685,7 +706,7 @@ u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
* -EINVAL if the request is invalid.
*/
int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,
- unsigned int tf_flags, int class)
+ unsigned int tf_flags, int cdl, int class)
{
struct ata_taskfile *tf = &qc->tf;
struct ata_device *dev = qc->dev;
@@ -724,11 +745,20 @@ int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,
if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED &&
class == IOPRIO_CLASS_RT)
tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO;
+
+ if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl)
+ ata_set_tf_cdl(qc, cdl);
+
} else if (dev->flags & ATA_DFLAG_LBA) {
tf->flags |= ATA_TFLAG_LBA;
- /* We need LBA48 for FUA writes */
- if (!(tf->flags & ATA_TFLAG_FUA) && lba_28_ok(block, n_block)) {
+ if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl)
+ ata_set_tf_cdl(qc, cdl);
+
+ /* Both FUA writes and a CDL index require 48-bit commands */
+ if (!(tf->flags & ATA_TFLAG_FUA) &&
+ !(qc->flags & ATA_QCFLAG_HAS_CDL) &&
+ lba_28_ok(block, n_block)) {
/* use LBA28 */
tf->device |= (block >> 24) & 0xf;
} else if (lba_48_ok(block, n_block)) {
@@ -2367,6 +2397,139 @@ static void ata_dev_config_trusted(struct ata_device *dev)
dev->flags |= ATA_DFLAG_TRUSTED;
}
+static void ata_dev_config_cdl(struct ata_device *dev)
+{
+ struct ata_port *ap = dev->link->ap;
+ unsigned int err_mask;
+ bool cdl_enabled;
+ u64 val;
+
+ if (ata_id_major_version(dev->id) < 12)
+ goto not_supported;
+
+ if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) ||
+ !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) ||
+ !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS))
+ goto not_supported;
+
+ err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
+ ATA_LOG_SUPPORTED_CAPABILITIES,
+ ap->sector_buf, 1);
+ if (err_mask)
+ goto not_supported;
+
+ /* Check Command Duration Limit Supported bits */
+ val = get_unaligned_le64(&ap->sector_buf[168]);
+ if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(0)))
+ goto not_supported;
+
+ /* Warn the user if command duration guideline is not supported */
+ if (!(val & BIT_ULL(1)))
+ ata_dev_warn(dev,
+ "Command duration guideline is not supported\n");
+
+ /*
+ * We must have support for the sense data for successful NCQ commands
+ * log indicated by the successful NCQ command sense data supported bit.
+ */
+ val = get_unaligned_le64(&ap->sector_buf[8]);
+ if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(47))) {
+ ata_dev_warn(dev,
+ "CDL supported but Successful NCQ Command Sense Data is not supported\n");
+ goto not_supported;
+ }
+
+ /* Without NCQ autosense, the successful NCQ commands log is useless. */
+ if (!ata_id_has_ncq_autosense(dev->id)) {
+ ata_dev_warn(dev,
+ "CDL supported but NCQ autosense is not supported\n");
+ goto not_supported;
+ }
+
+ /*
+ * If CDL is marked as enabled, make sure the feature is enabled too.
+ * Conversely, if CDL is disabled, make sure the feature is turned off.
+ */
+ err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
+ ATA_LOG_CURRENT_SETTINGS,
+ ap->sector_buf, 1);
+ if (err_mask)
+ goto not_supported;
+
+ val = get_unaligned_le64(&ap->sector_buf[8]);
+ cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21);
+ if (dev->flags & ATA_DFLAG_CDL_ENABLED) {
+ if (!cdl_enabled) {
+ /* Enable CDL on the device */
+ err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1);
+ if (err_mask) {
+ ata_dev_err(dev,
+ "Enable CDL feature failed\n");
+ goto not_supported;
+ }
+ }
+ } else {
+ if (cdl_enabled) {
+ /* Disable CDL on the device */
+ err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0);
+ if (err_mask) {
+ ata_dev_err(dev,
+ "Disable CDL feature failed\n");
+ goto not_supported;
+ }
+ }
+ }
+
+ /*
+ * While CDL itself has to be enabled using sysfs, CDL requires that
+ * sense data for successful NCQ commands is enabled to work properly.
+ * Just like ata_dev_config_sense_reporting(), enable it unconditionally
+ * if supported.
+ */
+ if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(18))) {
+ err_mask = ata_dev_set_feature(dev,
+ SETFEATURE_SENSE_DATA_SUCC_NCQ, 0x1);
+ if (err_mask) {
+ ata_dev_warn(dev,
+ "failed to enable Sense Data for successful NCQ commands, Emask 0x%x\n",
+ err_mask);
+ goto not_supported;
+ }
+ }
+
+ /*
+ * Allocate a buffer to handle reading the sense data for successful
+ * NCQ Commands log page for commands using a CDL with one of the limit
+ * policy set to 0xD (successful completion with sense data available
+ * bit set).
+ */
+ if (!ap->ncq_sense_buf) {
+ ap->ncq_sense_buf = kmalloc(ATA_LOG_SENSE_NCQ_SIZE, GFP_KERNEL);
+ if (!ap->ncq_sense_buf)
+ goto not_supported;
+ }
+
+ /*
+ * Command duration limits is supported: cache the CDL log page 18h
+ * (command duration descriptors).
+ */
+ err_mask = ata_read_log_page(dev, ATA_LOG_CDL, 0, ap->sector_buf, 1);
+ if (err_mask) {
+ ata_dev_warn(dev, "Read Command Duration Limits log failed\n");
+ goto not_supported;
+ }
+
+ memcpy(dev->cdl, ap->sector_buf, ATA_LOG_CDL_SIZE);
+ dev->flags |= ATA_DFLAG_CDL;
+
+ return;
+
+not_supported:
+ dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED);
+ kfree(ap->ncq_sense_buf);
+ ap->ncq_sense_buf = NULL;
+}
+
static int ata_dev_config_lba(struct ata_device *dev)
{
const u16 *id = dev->id;
@@ -2534,13 +2697,14 @@ static void ata_dev_print_features(struct ata_device *dev)
return;
ata_dev_info(dev,
- "Features:%s%s%s%s%s%s%s\n",
+ "Features:%s%s%s%s%s%s%s%s\n",
dev->flags & ATA_DFLAG_FUA ? " FUA" : "",
dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",
dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",
dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",
dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",
dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "",
+ dev->flags & ATA_DFLAG_CDL ? " CDL" : "",
dev->cpr_log ? " CPR" : "");
}
@@ -2702,6 +2866,7 @@ int ata_dev_configure(struct ata_device *dev)
ata_dev_config_zac(dev);
ata_dev_config_trusted(dev);
ata_dev_config_cpr(dev);
+ ata_dev_config_cdl(dev);
dev->cdb_len = 32;
if (print_info)
@@ -4766,6 +4931,36 @@ void ata_qc_complete(struct ata_queued_cmd *qc)
fill_result_tf(qc);
trace_ata_qc_complete_done(qc);
+
+ /*
+ * For CDL commands that completed without an error, check if
+ * we have sense data (ATA_SENSE is set). If we do, then the
+ * command may have been aborted by the device due to a limit
+ * timeout using the policy 0xD. For these commands, invoke EH
+ * to get the command sense data.
+ */
+ if (qc->result_tf.status & ATA_SENSE &&
+ ((ata_is_ncq(qc->tf.protocol) &&
+ dev->flags & ATA_DFLAG_CDL_ENABLED) ||
+ (!(ata_is_ncq(qc->tf.protocol) &&
+ ata_id_sense_reporting_enabled(dev->id))))) {
+ /*
+ * Tell SCSI EH to not overwrite scmd->result even if
+ * this command is finished with result SAM_STAT_GOOD.
+ */
+ qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS;
+ qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD;
+ ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE;
+
+ /*
+ * set pending so that ata_qc_schedule_eh() does not
+ * trigger fast drain, and freeze the port.
+ */
+ ap->pflags |= ATA_PFLAG_EH_PENDING;
+ ata_qc_schedule_eh(qc);
+ return;
+ }
+
/* Some commands need post-processing after successful
* completion.
*/
@@ -5398,6 +5593,7 @@ static void ata_host_release(struct kref *kref)
kfree(ap->pmp_link);
kfree(ap->slave_link);
+ kfree(ap->ncq_sense_buf);
kfree(ap);
host->ports[i] = NULL;
}
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index a6c901811802..05af292eb8ce 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1401,8 +1401,11 @@ unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key)
*
* LOCKING:
* Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * true if sense data could be fetched, false otherwise.
*/
-static void ata_eh_request_sense(struct ata_queued_cmd *qc)
+static bool ata_eh_request_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
struct ata_device *dev = qc->dev;
@@ -1411,15 +1414,12 @@ static void ata_eh_request_sense(struct ata_queued_cmd *qc)
if (ata_port_is_frozen(qc->ap)) {
ata_dev_warn(dev, "sense data available but port frozen\n");
- return;
+ return false;
}
- if (!cmd || qc->flags & ATA_QCFLAG_SENSE_VALID)
- return;
-
if (!ata_id_sense_reporting_enabled(dev->id)) {
ata_dev_warn(qc->dev, "sense data reporting disabled\n");
- return;
+ return false;
}
ata_tf_init(dev, &tf);
@@ -1432,13 +1432,19 @@ static void ata_eh_request_sense(struct ata_queued_cmd *qc)
/* Ignore err_mask; ATA_ERR might be set */
if (tf.status & ATA_SENSE) {
if (ata_scsi_sense_is_valid(tf.lbah, tf.lbam, tf.lbal)) {
- ata_scsi_set_sense(dev, cmd, tf.lbah, tf.lbam, tf.lbal);
+ /* Set sense without also setting scsicmd->result */
+ scsi_build_sense_buffer(dev->flags & ATA_DFLAG_D_SENSE,
+ cmd->sense_buffer, tf.lbah,
+ tf.lbam, tf.lbal);
qc->flags |= ATA_QCFLAG_SENSE_VALID;
+ return true;
}
} else {
ata_dev_warn(dev, "request sense failed stat %02x emask %x\n",
tf.status, err_mask);
}
+
+ return false;
}
/**
@@ -1588,8 +1594,9 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc)
* was not included in the NCQ command error log
* (i.e. NCQ autosense is not supported by the device).
*/
- if (!(qc->flags & ATA_QCFLAG_SENSE_VALID) && (stat & ATA_SENSE))
- ata_eh_request_sense(qc);
+ if (!(qc->flags & ATA_QCFLAG_SENSE_VALID) &&
+ (stat & ATA_SENSE) && ata_eh_request_sense(qc))
+ set_status_byte(qc->scsicmd, SAM_STAT_CHECK_CONDITION);
if (err & ATA_ICRC)
qc->err_mask |= AC_ERR_ATA_BUS;
if (err & (ATA_UNC | ATA_AMNF))
@@ -1910,6 +1917,99 @@ static inline bool ata_eh_quiet(struct ata_queued_cmd *qc)
return qc->flags & ATA_QCFLAG_QUIET;
}
+static int ata_eh_read_sense_success_non_ncq(struct ata_link *link)
+{
+ struct ata_port *ap = link->ap;
+ struct ata_queued_cmd *qc;
+
+ qc = __ata_qc_from_tag(ap, link->active_tag);
+ if (!qc)
+ return -EIO;
+
+ if (!(qc->flags & ATA_QCFLAG_EH) ||
+ !(qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD) ||
+ qc->err_mask)
+ return -EIO;
+
+ if (!ata_eh_request_sense(qc))
+ return -EIO;
+
+ /*
+ * If we have sense data, call scsi_check_sense() in order to set the
+ * correct SCSI ML byte (if any). No point in checking the return value,
+ * since the command has already completed successfully.
+ */
+ scsi_check_sense(qc->scsicmd);
+
+ return 0;
+}
+
+static void ata_eh_get_success_sense(struct ata_link *link)
+{
+ struct ata_eh_context *ehc = &link->eh_context;
+ struct ata_device *dev = link->device;
+ struct ata_port *ap = link->ap;
+ struct ata_queued_cmd *qc;
+ int tag, ret = 0;
+
+ if (!(ehc->i.dev_action[dev->devno] & ATA_EH_GET_SUCCESS_SENSE))
+ return;
+
+ /* if frozen, we can't do much */
+ if (ata_port_is_frozen(ap)) {
+ ata_dev_warn(dev,
+ "successful sense data available but port frozen\n");
+ goto out;
+ }
+
+ /*
+ * If the link has sactive set, then we have outstanding NCQ commands
+ * and have to read the Successful NCQ Commands log to get the sense
+ * data. Otherwise, we are dealing with a non-NCQ command and use
+ * request sense ext command to retrieve the sense data.
+ */
+ if (link->sactive)
+ ret = ata_eh_read_sense_success_ncq_log(link);
+ else
+ ret = ata_eh_read_sense_success_non_ncq(link);
+ if (ret)
+ goto out;
+
+ ata_eh_done(link, dev, ATA_EH_GET_SUCCESS_SENSE);
+ return;
+
+out:
+ /*
+ * If we failed to get sense data for a successful command that ought to
+ * have sense data, we cannot simply return BLK_STS_OK to user space.
+ * This is because we can't know if the sense data that we couldn't get
+ * was actually "DATA CURRENTLY UNAVAILABLE". Reporting such a command
+ * as success to user space would result in a silent data corruption.
+ * Thus, add a bogus ABORTED_COMMAND sense data to such commands, such
+ * that SCSI will report these commands as BLK_STS_IOERR to user space.
+ */
+ ata_qc_for_each_raw(ap, qc, tag) {
+ if (!(qc->flags & ATA_QCFLAG_EH) ||
+ !(qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD) ||
+ qc->err_mask ||
+ ata_dev_phys_link(qc->dev) != link)
+ continue;
+
+ /* We managed to get sense for this success command, skip. */
+ if (qc->flags & ATA_QCFLAG_SENSE_VALID)
+ continue;
+
+ /* This success command did not have any sense data, skip. */
+ if (!(qc->result_tf.status & ATA_SENSE))
+ continue;
+
+ /* This success command had sense data, but we failed to get. */
+ ata_scsi_set_sense(dev, qc->scsicmd, ABORTED_COMMAND, 0, 0);
+ qc->flags |= ATA_QCFLAG_SENSE_VALID;
+ }
+ ata_eh_done(link, dev, ATA_EH_GET_SUCCESS_SENSE);
+}
+
/**
* ata_eh_link_autopsy - analyze error and determine recovery action
* @link: host link to perform autopsy on
@@ -1950,6 +2050,14 @@ static void ata_eh_link_autopsy(struct ata_link *link)
/* analyze NCQ failure */
ata_eh_analyze_ncq_error(link);
+ /*
+ * Check if this was a successful command that simply needs sense data.
+ * Since the sense data is not part of the completion, we need to fetch
+ * it using an additional command. Since this can't be done from irq
+ * context, the sense data for successful commands are fetched by EH.
+ */
+ ata_eh_get_success_sense(link);
+
/* any real error trumps AC_ERR_OTHER */
if (ehc->i.err_mask & ~AC_ERR_OTHER)
ehc->i.err_mask &= ~AC_ERR_OTHER;
@@ -1959,6 +2067,7 @@ static void ata_eh_link_autopsy(struct ata_link *link)
ata_qc_for_each_raw(ap, qc, tag) {
if (!(qc->flags & ATA_QCFLAG_EH) ||
qc->flags & ATA_QCFLAG_RETRY ||
+ qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD ||
ata_dev_phys_link(qc->dev) != link)
continue;
@@ -3818,7 +3927,8 @@ void ata_eh_finish(struct ata_port *ap)
else
ata_eh_qc_complete(qc);
} else {
- if (qc->flags & ATA_QCFLAG_SENSE_VALID) {
+ if (qc->flags & ATA_QCFLAG_SENSE_VALID ||
+ qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD) {
ata_eh_qc_complete(qc);
} else {
/* feed zero TF to sense generation */
diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
index f3e7396e3191..7de4d8901fac 100644
--- a/drivers/ata/libata-sata.c
+++ b/drivers/ata/libata-sata.c
@@ -11,7 +11,9 @@
#include <linux/module.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
#include <linux/libata.h>
+#include <asm/unaligned.h>
#include "libata.h"
#include "libata-transport.h"
@@ -907,10 +909,17 @@ static ssize_t ata_ncq_prio_enable_store(struct device *device,
goto unlock;
}
- if (input)
+ if (input) {
+ if (dev->flags & ATA_DFLAG_CDL_ENABLED) {
+ ata_dev_err(dev,
+ "CDL must be disabled to enable NCQ priority\n");
+ rc = -EINVAL;
+ goto unlock;
+ }
dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLED;
- else
+ } else {
dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED;
+ }
unlock:
spin_unlock_irq(ap->lock);
@@ -1402,6 +1411,95 @@ static int ata_eh_read_log_10h(struct ata_device *dev,
}
/**
+ * ata_eh_read_sense_success_ncq_log - Read the sense data for successful
+ * NCQ commands log
+ * @link: ATA link to get sense data for
+ *
+ * Read the sense data for successful NCQ commands log page to obtain
+ * sense data for all NCQ commands that completed successfully with
+ * the sense data available bit set.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int ata_eh_read_sense_success_ncq_log(struct ata_link *link)
+{
+ struct ata_device *dev = link->device;
+ struct ata_port *ap = dev->link->ap;
+ u8 *buf = ap->ncq_sense_buf;
+ struct ata_queued_cmd *qc;
+ unsigned int err_mask, tag;
+ u8 *sense, sk = 0, asc = 0, ascq = 0;
+ u64 sense_valid, val;
+ int ret = 0;
+
+ err_mask = ata_read_log_page(dev, ATA_LOG_SENSE_NCQ, 0, buf, 2);
+ if (err_mask) {
+ ata_dev_err(dev,
+ "Failed to read Sense Data for Successful NCQ Commands log\n");
+ return -EIO;
+ }
+
+ /* Check the log header */
+ val = get_unaligned_le64(&buf[0]);
+ if ((val & 0xffff) != 1 || ((val >> 16) & 0xff) != 0x0f) {
+ ata_dev_err(dev,
+ "Invalid Sense Data for Successful NCQ Commands log\n");
+ return -EIO;
+ }
+
+ sense_valid = (u64)buf[8] | ((u64)buf[9] << 8) |
+ ((u64)buf[10] << 16) | ((u64)buf[11] << 24);
+
+ ata_qc_for_each_raw(ap, qc, tag) {
+ if (!(qc->flags & ATA_QCFLAG_EH) ||
+ !(qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD) ||
+ qc->err_mask ||
+ ata_dev_phys_link(qc->dev) != link)
+ continue;
+
+ /*
+ * If the command does not have any sense data, clear ATA_SENSE.
+ * Keep ATA_QCFLAG_EH_SUCCESS_CMD so that command is finished.
+ */
+ if (!(sense_valid & (1ULL << tag))) {
+ qc->result_tf.status &= ~ATA_SENSE;
+ continue;
+ }
+
+ sense = &buf[32 + 24 * tag];
+ sk = sense[0];
+ asc = sense[1];
+ ascq = sense[2];
+
+ if (!ata_scsi_sense_is_valid(sk, asc, ascq)) {
+ ret = -EIO;
+ continue;
+ }
+
+ /* Set sense without also setting scsicmd->result */
+ scsi_build_sense_buffer(dev->flags & ATA_DFLAG_D_SENSE,
+ qc->scsicmd->sense_buffer, sk,
+ asc, ascq);
+ qc->flags |= ATA_QCFLAG_SENSE_VALID;
+
+ /*
+ * If we have sense data, call scsi_check_sense() in order to
+ * set the correct SCSI ML byte (if any). No point in checking
+ * the return value, since the command has already completed
+ * successfully.
+ */
+ scsi_check_sense(qc->scsicmd);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ata_eh_read_sense_success_ncq_log);
+
+/**
* ata_eh_analyze_ncq_error - analyze NCQ error
* @link: ATA link to analyze NCQ error for
*
@@ -1481,6 +1579,7 @@ void ata_eh_analyze_ncq_error(struct ata_link *link)
ata_qc_for_each_raw(ap, qc, tag) {
if (!(qc->flags & ATA_QCFLAG_EH) ||
+ qc->flags & ATA_QCFLAG_EH_SUCCESS_CMD ||
ata_dev_phys_link(qc->dev) != link)
continue;
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 7bb12deab70c..69fc0d2c2123 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -37,7 +37,7 @@
#include "libata.h"
#include "libata-transport.h"
-#define ATA_SCSI_RBUF_SIZE 576
+#define ATA_SCSI_RBUF_SIZE 2048
static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
@@ -47,15 +47,19 @@ typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
const struct scsi_device *scsidev);
-#define RW_RECOVERY_MPAGE 0x1
-#define RW_RECOVERY_MPAGE_LEN 12
-#define CACHE_MPAGE 0x8
-#define CACHE_MPAGE_LEN 20
-#define CONTROL_MPAGE 0xa
-#define CONTROL_MPAGE_LEN 12
-#define ALL_MPAGES 0x3f
-#define ALL_SUB_MPAGES 0xff
-
+#define RW_RECOVERY_MPAGE 0x1
+#define RW_RECOVERY_MPAGE_LEN 12
+#define CACHE_MPAGE 0x8
+#define CACHE_MPAGE_LEN 20
+#define CONTROL_MPAGE 0xa
+#define CONTROL_MPAGE_LEN 12
+#define ALL_MPAGES 0x3f
+#define ALL_SUB_MPAGES 0xff
+#define CDL_T2A_SUB_MPAGE 0x07
+#define CDL_T2B_SUB_MPAGE 0x08
+#define CDL_T2_SUB_MPAGE_LEN 232
+#define ATA_FEATURE_SUB_MPAGE 0xf2
+#define ATA_FEATURE_SUB_MPAGE_LEN 16
static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
RW_RECOVERY_MPAGE,
@@ -209,9 +213,6 @@ void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
{
bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
- if (!cmd)
- return;
-
scsi_build_sense(cmd, d_sense, sk, asc, ascq);
}
@@ -221,9 +222,6 @@ void ata_scsi_set_sense_information(struct ata_device *dev,
{
u64 information;
- if (!cmd)
- return;
-
information = ata_tf_read_block(tf, dev);
if (information == U64_MAX)
return;
@@ -1383,6 +1381,18 @@ static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
}
/**
+ * scsi_dld - Get duration limit descriptor index
+ * @cdb: SCSI command to translate
+ *
+ * Returns the dld bits indicating the index of a command duration limit
+ * descriptor.
+ */
+static inline int scsi_dld(const u8 *cdb)
+{
+ return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03);
+}
+
+/**
* ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
* @qc: Storage for translated ATA taskfile
*
@@ -1550,6 +1560,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
struct request *rq = scsi_cmd_to_rq(scmd);
int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
unsigned int tf_flags = 0;
+ int dld = 0;
u64 block;
u32 n_block;
int rc;
@@ -1600,6 +1611,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
goto invalid_fld;
}
scsi_16_lba_len(cdb, &block, &n_block);
+ dld = scsi_dld(cdb);
if (cdb[1] & (1 << 3))
tf_flags |= ATA_TFLAG_FUA;
if (!ata_check_nblocks(scmd, n_block))
@@ -1624,7 +1636,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
qc->flags |= ATA_QCFLAG_IO;
qc->nbytes = n_block * scmd->device->sector_size;
- rc = ata_build_rw_tf(qc, block, n_block, tf_flags, class);
+ rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class);
if (likely(rc == 0))
return 0;
@@ -2203,10 +2215,123 @@ static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
return sizeof(def_cache_mpage);
}
+/*
+ * Simulate MODE SENSE control mode page, sub-page 0.
+ */
+static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf,
+ bool changeable)
+{
+ modecpy(buf, def_control_mpage,
+ sizeof(def_control_mpage), changeable);
+ if (changeable) {
+ /* ata_mselect_control() */
+ buf[2] |= (1 << 2);
+ } else {
+ bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
+
+ /* descriptor format sense data */
+ buf[2] |= (d_sense << 2);
+ }
+
+ return sizeof(def_control_mpage);
+}
+
+/*
+ * Translate an ATA duration limit in microseconds to a SCSI duration limit
+ * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes
+ * only, take care of overflows.
+ */
+static inline u16 ata_xlat_cdl_limit(u8 *buf)
+{
+ u32 limit = get_unaligned_le32(buf);
+
+ return min_t(u32, limit / 10000, 65535);
+}
+
+/*
+ * Simulate MODE SENSE control mode page, sub-pages 07h and 08h
+ * (command duration limits T2A and T2B mode pages).
+ */
+static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf,
+ u8 spg)
+{
+ u8 *b, *cdl = dev->cdl, *desc;
+ u32 policy;
+ int i;
+
+ /*
+ * Fill the subpage. The first four bytes of the T2A/T2B mode pages
+ * are a header. The PAGE LENGTH field is the size of the page
+ * excluding the header.
+ */
+ buf[0] = CONTROL_MPAGE;
+ buf[1] = spg;
+ put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]);
+ if (spg == CDL_T2A_SUB_MPAGE) {
+ /*
+ * Read descriptors map to the T2A page:
+ * set perf_vs_duration_guidleine.
+ */
+ buf[7] = (cdl[0] & 0x03) << 4;
+ desc = cdl + 64;
+ } else {
+ /* Write descriptors map to the T2B page */
+ desc = cdl + 288;
+ }
+
+ /* Fill the T2 page descriptors */
+ b = &buf[8];
+ policy = get_unaligned_le32(&cdl[0]);
+ for (i = 0; i < 7; i++, b += 32, desc += 32) {
+ /* t2cdlunits: fixed to 10ms */
+ b[0] = 0x0a;
+
+ /* Max inactive time and its policy */
+ put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]);
+ b[6] = ((policy >> 8) & 0x0f) << 4;
+
+ /* Max active time and its policy */
+ put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]);
+ b[6] |= (policy >> 4) & 0x0f;
+
+ /* Command duration guideline and its policy */
+ put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]);
+ b[14] = policy & 0x0f;
+ }
+
+ return CDL_T2_SUB_MPAGE_LEN;
+}
+
+/*
+ * Simulate MODE SENSE control mode page, sub-page f2h
+ * (ATA feature control mode page).
+ */
+static unsigned int ata_msense_control_ata_feature(struct ata_device *dev,
+ u8 *buf)
+{
+ /* PS=0, SPF=1 */
+ buf[0] = CONTROL_MPAGE | (1 << 6);
+ buf[1] = ATA_FEATURE_SUB_MPAGE;
+
+ /*
+ * The first four bytes of ATA Feature Control mode page are a header.
+ * The PAGE LENGTH field is the size of the page excluding the header.
+ */
+ put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]);
+
+ if (dev->flags & ATA_DFLAG_CDL)
+ buf[4] = 0x02; /* Support T2A and T2B pages */
+ else
+ buf[4] = 0;
+
+ return ATA_FEATURE_SUB_MPAGE_LEN;
+}
+
/**
* ata_msense_control - Simulate MODE SENSE control mode page
* @dev: ATA device of interest
* @buf: output buffer
+ * @spg: sub-page code
* @changeable: whether changeable parameters are requested
*
* Generate a generic MODE SENSE control mode page.
@@ -2215,17 +2340,27 @@ static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
* None.
*/
static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
- bool changeable)
+ u8 spg, bool changeable)
{
- modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
- if (changeable) {
- buf[2] |= (1 << 2); /* ata_mselect_control() */
- } else {
- bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
-
- buf[2] |= (d_sense << 2); /* descriptor format sense data */
+ unsigned int n;
+
+ switch (spg) {
+ case 0:
+ return ata_msense_control_spg0(dev, buf, changeable);
+ case CDL_T2A_SUB_MPAGE:
+ case CDL_T2B_SUB_MPAGE:
+ return ata_msense_control_spgt2(dev, buf, spg);
+ case ATA_FEATURE_SUB_MPAGE:
+ return ata_msense_control_ata_feature(dev, buf);
+ case ALL_SUB_MPAGES:
+ n = ata_msense_control_spg0(dev, buf, changeable);
+ n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE);
+ n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE);
+ n += ata_msense_control_ata_feature(dev, buf + n);
+ return n;
+ default:
+ return 0;
}
- return sizeof(def_control_mpage);
}
/**
@@ -2298,13 +2433,25 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
pg = scsicmd[2] & 0x3f;
spg = scsicmd[3];
+
/*
- * No mode subpages supported (yet) but asking for _all_
- * subpages may be valid
+ * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of
+ * the control page.
*/
- if (spg && (spg != ALL_SUB_MPAGES)) {
- fp = 3;
- goto invalid_fld;
+ if (spg) {
+ switch (spg) {
+ case ALL_SUB_MPAGES:
+ break;
+ case CDL_T2A_SUB_MPAGE:
+ case CDL_T2B_SUB_MPAGE:
+ case ATA_FEATURE_SUB_MPAGE:
+ if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE)
+ break;
+ fallthrough;
+ default:
+ fp = 3;
+ goto invalid_fld;
+ }
}
switch(pg) {
@@ -2317,13 +2464,13 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
break;
case CONTROL_MPAGE:
- p += ata_msense_control(args->dev, p, page_control == 1);
+ p += ata_msense_control(args->dev, p, spg, page_control == 1);
break;
case ALL_MPAGES:
p += ata_msense_rw_recovery(p, page_control == 1);
p += ata_msense_caching(args->id, p, page_control == 1);
- p += ata_msense_control(args->dev, p, page_control == 1);
+ p += ata_msense_control(args->dev, p, spg, page_control == 1);
break;
default: /* invalid page code */
@@ -2342,10 +2489,7 @@ static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
}
} else {
- unsigned int output_len = p - rbuf - 2;
-
- rbuf[0] = output_len >> 8;
- rbuf[1] = output_len;
+ put_unaligned_be16(p - rbuf - 2, &rbuf[0]);
rbuf[3] |= dpofua;
if (ebd) {
rbuf[7] = sizeof(sat_blk_desc);
@@ -3242,7 +3386,7 @@ static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
{
struct ata_device *dev = args->dev;
u8 *cdb = args->cmd->cmnd;
- u8 supported = 0;
+ u8 supported = 0, cdlp = 0, rwcdlp = 0;
unsigned int err = 0;
if (cdb[2] != 1 && cdb[2] != 3) {
@@ -3269,10 +3413,8 @@ static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
case MAINTENANCE_IN:
case READ_6:
case READ_10:
- case READ_16:
case WRITE_6:
case WRITE_10:
- case WRITE_16:
case ATA_12:
case ATA_16:
case VERIFY:
@@ -3282,6 +3424,28 @@ static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
case START_STOP:
supported = 3;
break;
+ case READ_16:
+ supported = 3;
+ if (dev->flags & ATA_DFLAG_CDL) {
+ /*
+ * CDL read descriptors map to the T2A page, that is,
+ * rwcdlp = 0x01 and cdlp = 0x01
+ */
+ rwcdlp = 0x01;
+ cdlp = 0x01 << 3;
+ }
+ break;
+ case WRITE_16:
+ supported = 3;
+ if (dev->flags & ATA_DFLAG_CDL) {
+ /*
+ * CDL write descriptors map to the T2B page, that is,
+ * rwcdlp = 0x01 and cdlp = 0x02
+ */
+ rwcdlp = 0x01;
+ cdlp = 0x02 << 3;
+ }
+ break;
case ZBC_IN:
case ZBC_OUT:
if (ata_id_zoned_cap(dev->id) ||
@@ -3297,7 +3461,9 @@ static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
break;
}
out:
- rbuf[1] = supported; /* supported */
+ /* One command format */
+ rbuf[0] = rwcdlp;
+ rbuf[1] = cdlp | supported;
return err;
}
@@ -3587,20 +3753,11 @@ static int ata_mselect_caching(struct ata_queued_cmd *qc,
return 0;
}
-/**
- * ata_mselect_control - Simulate MODE SELECT for control page
- * @qc: Storage for translated ATA taskfile
- * @buf: input buffer
- * @len: number of valid bytes in the input buffer
- * @fp: out parameter for the failed field on error
- *
- * Prepare a taskfile to modify caching information for the device.
- *
- * LOCKING:
- * None.
+/*
+ * Simulate MODE SELECT control mode page, sub-page 0.
*/
-static int ata_mselect_control(struct ata_queued_cmd *qc,
- const u8 *buf, int len, u16 *fp)
+static int ata_mselect_control_spg0(struct ata_queued_cmd *qc,
+ const u8 *buf, int len, u16 *fp)
{
struct ata_device *dev = qc->dev;
u8 mpage[CONTROL_MPAGE_LEN];
@@ -3622,7 +3779,7 @@ static int ata_mselect_control(struct ata_queued_cmd *qc,
/*
* Check that read-only bits are not modified.
*/
- ata_msense_control(dev, mpage, false);
+ ata_msense_control_spg0(dev, mpage, false);
for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
if (i == 0)
continue;
@@ -3638,6 +3795,83 @@ static int ata_mselect_control(struct ata_queued_cmd *qc,
return 0;
}
+/*
+ * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode
+ * page) into a SET FEATURES command.
+ */
+static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc,
+ const u8 *buf, int len,
+ u16 *fp)
+{
+ struct ata_device *dev = qc->dev;
+ struct ata_taskfile *tf = &qc->tf;
+ u8 cdl_action;
+
+ /*
+ * The first four bytes of ATA Feature Control mode page are a header,
+ * so offsets in mpage are off by 4 compared to buf. Same for len.
+ */
+ if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) {
+ *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4);
+ return -EINVAL;
+ }
+
+ /* Check cdl_ctrl */
+ switch (buf[0] & 0x03) {
+ case 0:
+ /* Disable CDL */
+ cdl_action = 0;
+ dev->flags &= ~ATA_DFLAG_CDL_ENABLED;
+ break;
+ case 0x02:
+ /* Enable CDL T2A/T2B: NCQ priority must be disabled */
+ if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) {
+ ata_dev_err(dev,
+ "NCQ priority must be disabled to enable CDL\n");
+ return -EINVAL;
+ }
+ cdl_action = 1;
+ dev->flags |= ATA_DFLAG_CDL_ENABLED;
+ break;
+ default:
+ *fp = 0;
+ return -EINVAL;
+ }
+
+ tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
+ tf->protocol = ATA_PROT_NODATA;
+ tf->command = ATA_CMD_SET_FEATURES;
+ tf->feature = SETFEATURES_CDL;
+ tf->nsect = cdl_action;
+
+ return 1;
+}
+
+/**
+ * ata_mselect_control - Simulate MODE SELECT for control page
+ * @qc: Storage for translated ATA taskfile
+ * @buf: input buffer
+ * @len: number of valid bytes in the input buffer
+ * @fp: out parameter for the failed field on error
+ *
+ * Prepare a taskfile to modify caching information for the device.
+ *
+ * LOCKING:
+ * None.
+ */
+static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg,
+ const u8 *buf, int len, u16 *fp)
+{
+ switch (spg) {
+ case 0:
+ return ata_mselect_control_spg0(qc, buf, len, fp);
+ case ATA_FEATURE_SUB_MPAGE:
+ return ata_mselect_control_ata_feature(qc, buf, len, fp);
+ default:
+ return -EINVAL;
+ }
+}
+
/**
* ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
* @qc: Storage for translated ATA taskfile
@@ -3655,7 +3889,7 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
const u8 *cdb = scmd->cmnd;
u8 pg, spg;
unsigned six_byte, pg_len, hdr_len, bd_len;
- int len;
+ int len, ret;
u16 fp = (u16)-1;
u8 bp = 0xff;
u8 buffer[64];
@@ -3740,13 +3974,29 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
}
/*
- * No mode subpages supported (yet) but asking for _all_
- * subpages may be valid
+ * Supported subpages: all subpages and ATA feature sub-page f2h of
+ * the control page.
*/
- if (spg && (spg != ALL_SUB_MPAGES)) {
- fp = (p[0] & 0x40) ? 1 : 0;
- fp += hdr_len + bd_len;
- goto invalid_param;
+ if (spg) {
+ switch (spg) {
+ case ALL_SUB_MPAGES:
+ /* All subpages is not supported for the control page */
+ if (pg == CONTROL_MPAGE) {
+ fp = (p[0] & 0x40) ? 1 : 0;
+ fp += hdr_len + bd_len;
+ goto invalid_param;
+ }
+ break;
+ case ATA_FEATURE_SUB_MPAGE:
+ if (qc->dev->flags & ATA_DFLAG_CDL &&
+ pg == CONTROL_MPAGE)
+ break;
+ fallthrough;
+ default:
+ fp = (p[0] & 0x40) ? 1 : 0;
+ fp += hdr_len + bd_len;
+ goto invalid_param;
+ }
}
if (pg_len > len)
goto invalid_param_len;
@@ -3759,14 +4009,16 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
}
break;
case CONTROL_MPAGE:
- if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
+ ret = ata_mselect_control(qc, spg, p, pg_len, &fp);
+ if (ret < 0) {
fp += hdr_len + bd_len;
goto invalid_param;
- } else {
- goto skip; /* No ATA command to send */
}
+ if (!ret)
+ goto skip; /* No ATA command to send */
break;
- default: /* invalid page code */
+ default:
+ /* Invalid page code */
fp = bd_len + hdr_len;
goto invalid_param;
}
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 926d0d33cd29..cf993885d2b2 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -45,7 +45,7 @@ static inline void ata_force_cbl(struct ata_port *ap) { }
extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
extern int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,
- unsigned int tf_flags, int class);
+ unsigned int tf_flags, int dld, int class);
extern u64 ata_tf_read_block(const struct ata_taskfile *tf,
struct ata_device *dev);
extern unsigned ata_exec_internal(struct ata_device *dev,
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 09ef0b31dfc0..c4bf99a842f3 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -504,18 +504,22 @@ void scsi_attach_vpd(struct scsi_device *sdev)
}
/**
- * scsi_report_opcode - Find out if a given command opcode is supported
+ * scsi_report_opcode - Find out if a given command is supported
* @sdev: scsi device to query
* @buffer: scratch buffer (must be at least 20 bytes long)
* @len: length of buffer
- * @opcode: opcode for command to look up
- *
- * Uses the REPORT SUPPORTED OPERATION CODES to look up the given
- * opcode. Returns -EINVAL if RSOC fails, 0 if the command opcode is
- * unsupported and 1 if the device claims to support the command.
+ * @opcode: opcode for the command to look up
+ * @sa: service action for the command to look up
+ *
+ * Uses the REPORT SUPPORTED OPERATION CODES to check support for the
+ * command identified with @opcode and @sa. If the command does not
+ * have a service action, @sa must be 0. Returns -EINVAL if RSOC fails,
+ * 0 if the command is not supported and 1 if the device claims to
+ * support the command.
*/
int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
- unsigned int len, unsigned char opcode)
+ unsigned int len, unsigned char opcode,
+ unsigned short sa)
{
unsigned char cmd[16];
struct scsi_sense_hdr sshdr;
@@ -539,8 +543,14 @@ int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
memset(cmd, 0, 16);
cmd[0] = MAINTENANCE_IN;
cmd[1] = MI_REPORT_SUPPORTED_OPERATION_CODES;
- cmd[2] = 1; /* One command format */
- cmd[3] = opcode;
+ if (!sa) {
+ cmd[2] = 1; /* One command format */
+ cmd[3] = opcode;
+ } else {
+ cmd[2] = 3; /* One command format with service action */
+ cmd[3] = opcode;
+ put_unaligned_be16(sa, &cmd[4]);
+ }
put_unaligned_be32(request_len, &cmd[6]);
memset(buffer, 0, len);
@@ -560,6 +570,149 @@ int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
}
EXPORT_SYMBOL(scsi_report_opcode);
+#define SCSI_CDL_CHECK_BUF_LEN 64
+
+static bool scsi_cdl_check_cmd(struct scsi_device *sdev, u8 opcode, u16 sa,
+ unsigned char *buf)
+{
+ int ret;
+ u8 cdlp;
+
+ /* Check operation code */
+ ret = scsi_report_opcode(sdev, buf, SCSI_CDL_CHECK_BUF_LEN, opcode, sa);
+ if (ret <= 0)
+ return false;
+
+ if ((buf[1] & 0x03) != 0x03)
+ return false;
+
+ /* See SPC-6, one command format of REPORT SUPPORTED OPERATION CODES */
+ cdlp = (buf[1] & 0x18) >> 3;
+ if (buf[0] & 0x01) {
+ /* rwcdlp == 1 */
+ switch (cdlp) {
+ case 0x01:
+ /* T2A page */
+ return true;
+ case 0x02:
+ /* T2B page */
+ return true;
+ }
+ } else {
+ /* rwcdlp == 0 */
+ switch (cdlp) {
+ case 0x01:
+ /* A page */
+ return true;
+ case 0x02:
+ /* B page */
+ return true;
+ }
+ }
+
+ return false;
+}
+
+/**
+ * scsi_cdl_check - Check if a SCSI device supports Command Duration Limits
+ * @sdev: The device to check
+ */
+void scsi_cdl_check(struct scsi_device *sdev)
+{
+ bool cdl_supported;
+ unsigned char *buf;
+
+ buf = kmalloc(SCSI_CDL_CHECK_BUF_LEN, GFP_KERNEL);
+ if (!buf) {
+ sdev->cdl_supported = 0;
+ return;
+ }
+
+ /* Check support for READ_16, WRITE_16, READ_32 and WRITE_32 commands */
+ cdl_supported =
+ scsi_cdl_check_cmd(sdev, READ_16, 0, buf) ||
+ scsi_cdl_check_cmd(sdev, WRITE_16, 0, buf) ||
+ scsi_cdl_check_cmd(sdev, VARIABLE_LENGTH_CMD, READ_32, buf) ||
+ scsi_cdl_check_cmd(sdev, VARIABLE_LENGTH_CMD, WRITE_32, buf);
+ if (cdl_supported) {
+ /*
+ * We have CDL support: force the use of READ16/WRITE16.
+ * READ32 and WRITE32 will be used for devices that support
+ * the T10_PI_TYPE2_PROTECTION protection type.
+ */
+ sdev->use_16_for_rw = 1;
+ sdev->use_10_for_rw = 0;
+
+ sdev->cdl_supported = 1;
+ } else {
+ sdev->cdl_supported = 0;
+ }
+
+ kfree(buf);
+}
+
+/**
+ * scsi_cdl_enable - Enable or disable a SCSI device supports for Command
+ * Duration Limits
+ * @sdev: The target device
+ * @enable: the target state
+ */
+int scsi_cdl_enable(struct scsi_device *sdev, bool enable)
+{
+ struct scsi_mode_data data;
+ struct scsi_sense_hdr sshdr;
+ struct scsi_vpd *vpd;
+ bool is_ata = false;
+ char buf[64];
+ int ret;
+
+ if (!sdev->cdl_supported)
+ return -EOPNOTSUPP;
+
+ rcu_read_lock();
+ vpd = rcu_dereference(sdev->vpd_pg89);
+ if (vpd)
+ is_ata = true;
+ rcu_read_unlock();
+
+ /*
+ * For ATA devices, CDL needs to be enabled with a SET FEATURES command.
+ */
+ if (is_ata) {
+ char *buf_data;
+ int len;
+
+ ret = scsi_mode_sense(sdev, 0x08, 0x0a, 0xf2, buf, sizeof(buf),
+ 5 * HZ, 3, &data, NULL);
+ if (ret)
+ return -EINVAL;
+
+ /* Enable CDL using the ATA feature page */
+ len = min_t(size_t, sizeof(buf),
+ data.length - data.header_length -
+ data.block_descriptor_length);
+ buf_data = buf + data.header_length +
+ data.block_descriptor_length;
+ if (enable)
+ buf_data[4] = 0x02;
+ else
+ buf_data[4] = 0;
+
+ ret = scsi_mode_select(sdev, 1, 0, buf_data, len, 5 * HZ, 3,
+ &data, &sshdr);
+ if (ret) {
+ if (scsi_sense_valid(&sshdr))
+ scsi_print_sense_hdr(sdev,
+ dev_name(&sdev->sdev_gendev), &sshdr);
+ return ret;
+ }
+ }
+
+ sdev->cdl_enable = enable;
+
+ return 0;
+}
+
/**
* scsi_device_get - get an additional reference to a scsi_device
* @sdev: device to get a reference to
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 3ec8bfd4090f..c67cdcdc3ba8 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -536,6 +536,7 @@ static inline void set_scsi_ml_byte(struct scsi_cmnd *cmd, u8 status)
*/
enum scsi_disposition scsi_check_sense(struct scsi_cmnd *scmd)
{
+ struct request *req = scsi_cmd_to_rq(scmd);
struct scsi_device *sdev = scmd->device;
struct scsi_sense_hdr sshdr;
@@ -595,6 +596,22 @@ enum scsi_disposition scsi_check_sense(struct scsi_cmnd *scmd)
if (sshdr.asc == 0x10) /* DIF */
return SUCCESS;
+ /*
+ * Check aborts due to command duration limit policy:
+ * ABORTED COMMAND additional sense code with the
+ * COMMAND TIMEOUT BEFORE PROCESSING or
+ * COMMAND TIMEOUT DURING PROCESSING or
+ * COMMAND TIMEOUT DURING PROCESSING DUE TO ERROR RECOVERY
+ * additional sense code qualifiers.
+ */
+ if (sshdr.asc == 0x2e &&
+ sshdr.ascq >= 0x01 && sshdr.ascq <= 0x03) {
+ set_scsi_ml_byte(scmd, SCSIML_STAT_DL_TIMEOUT);
+ req->cmd_flags |= REQ_FAILFAST_DEV;
+ req->rq_flags |= RQF_QUIET;
+ return SUCCESS;
+ }
+
if (sshdr.asc == 0x44 && sdev->sdev_bflags & BLIST_RETRY_ITF)
return ADD_TO_MLQUEUE;
if (sshdr.asc == 0xc1 && sshdr.ascq == 0x01 &&
@@ -691,6 +708,14 @@ enum scsi_disposition scsi_check_sense(struct scsi_cmnd *scmd)
}
return SUCCESS;
+ case COMPLETED:
+ if (sshdr.asc == 0x55 && sshdr.ascq == 0x0a) {
+ set_scsi_ml_byte(scmd, SCSIML_STAT_DL_TIMEOUT);
+ req->cmd_flags |= REQ_FAILFAST_DEV;
+ req->rq_flags |= RQF_QUIET;
+ }
+ return SUCCESS;
+
default:
return SUCCESS;
}
@@ -785,6 +810,14 @@ static enum scsi_disposition scsi_eh_completed_normally(struct scsi_cmnd *scmd)
switch (get_status_byte(scmd)) {
case SAM_STAT_GOOD:
scsi_handle_queue_ramp_up(scmd->device);
+ if (scmd->sense_buffer && SCSI_SENSE_VALID(scmd))
+ /*
+ * If we have sense data, call scsi_check_sense() in
+ * order to set the correct SCSI ML byte (if any).
+ * No point in checking the return value, since the
+ * command has already completed successfully.
+ */
+ scsi_check_sense(scmd);
fallthrough;
case SAM_STAT_COMMAND_TERMINATED:
return SUCCESS;
@@ -1807,6 +1840,10 @@ bool scsi_noretry_cmd(struct scsi_cmnd *scmd)
return !!(req->cmd_flags & REQ_FAILFAST_DRIVER);
}
+ /* Never retry commands aborted due to a duration limit timeout */
+ if (scsi_ml_byte(scmd->result) == SCSIML_STAT_DL_TIMEOUT)
+ return true;
+
if (!scsi_status_is_check_condition(scmd->result))
return false;
@@ -1966,6 +2003,14 @@ enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *scmd)
if (scmd->cmnd[0] == REPORT_LUNS)
scmd->device->sdev_target->expecting_lun_change = 0;
scsi_handle_queue_ramp_up(scmd->device);
+ if (scmd->sense_buffer && SCSI_SENSE_VALID(scmd))
+ /*
+ * If we have sense data, call scsi_check_sense() in
+ * order to set the correct SCSI ML byte (if any).
+ * No point in checking the return value, since the
+ * command has already completed successfully.
+ */
+ scsi_check_sense(scmd);
fallthrough;
case SAM_STAT_COMMAND_TERMINATED:
return SUCCESS;
@@ -2165,7 +2210,8 @@ void scsi_eh_flush_done_q(struct list_head *done_q)
* scsi_eh_get_sense), scmd->result is already
* set, do not set DID_TIME_OUT.
*/
- if (!scmd->result)
+ if (!scmd->result &&
+ !(scmd->flags & SCMD_FORCE_EH_SUCCESS))
scmd->result |= (DID_TIME_OUT << 16);
SCSI_LOG_ERROR_RECOVERY(3,
scmd_printk(KERN_INFO, scmd,
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index e1468483ac7e..25489fbd94c6 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -578,11 +578,6 @@ static bool scsi_end_request(struct request *req, blk_status_t error,
return false;
}
-static inline u8 get_scsi_ml_byte(int result)
-{
- return (result >> 8) & 0xff;
-}
-
/**
* scsi_result_to_blk_status - translate a SCSI result code into blk_status_t
* @result: scsi error code
@@ -595,7 +590,7 @@ static blk_status_t scsi_result_to_blk_status(int result)
* Check the scsi-ml byte first in case we converted a host or status
* byte.
*/
- switch (get_scsi_ml_byte(result)) {
+ switch (scsi_ml_byte(result)) {
case SCSIML_STAT_OK:
break;
case SCSIML_STAT_RESV_CONFLICT:
@@ -606,6 +601,8 @@ static blk_status_t scsi_result_to_blk_status(int result)
return BLK_STS_MEDIUM;
case SCSIML_STAT_TGT_FAILURE:
return BLK_STS_TARGET;
+ case SCSIML_STAT_DL_TIMEOUT:
+ return BLK_STS_DURATION_LIMIT;
}
switch (host_byte(result)) {
@@ -803,6 +800,8 @@ static void scsi_io_completion_action(struct scsi_cmnd *cmd, int result)
blk_stat = BLK_STS_ZONE_OPEN_RESOURCE;
}
break;
+ case COMPLETED:
+ fallthrough;
default:
action = ACTION_FAIL;
break;
@@ -2149,6 +2148,7 @@ EXPORT_SYMBOL_GPL(scsi_mode_select);
* @sdev: SCSI device to be queried
* @dbd: set to prevent mode sense from returning block descriptors
* @modepage: mode page being requested
+ * @subpage: sub-page of the mode page being requested
* @buffer: request buffer (may not be smaller than eight bytes)
* @len: length of request buffer.
* @timeout: command timeout
@@ -2160,7 +2160,7 @@ EXPORT_SYMBOL_GPL(scsi_mode_select);
* Returns zero if successful, or a negative error number on failure
*/
int
-scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
+scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, int subpage,
unsigned char *buffer, int len, int timeout, int retries,
struct scsi_mode_data *data, struct scsi_sense_hdr *sshdr)
{
@@ -2180,6 +2180,7 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
dbd = sdev->set_dbd_for_ms ? 8 : dbd;
cmd[1] = dbd & 0x18; /* allows DBD and LLBA bits */
cmd[2] = modepage;
+ cmd[3] = subpage;
sshdr = exec_args.sshdr;
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index 96284a0e13fe..f42388ecb024 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -27,8 +27,14 @@ enum scsi_ml_status {
SCSIML_STAT_NOSPC = 0x02, /* Space allocation on the dev failed */
SCSIML_STAT_MED_ERROR = 0x03, /* Medium error */
SCSIML_STAT_TGT_FAILURE = 0x04, /* Permanent target failure */
+ SCSIML_STAT_DL_TIMEOUT = 0x05, /* Command Duration Limit timeout */
};
+static inline u8 scsi_ml_byte(int result)
+{
+ return (result >> 8) & 0xff;
+}
+
/*
* Scsi Error Handler Flags
*/
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index d217be323cc6..aa13feb17c62 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -1087,6 +1087,8 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
if (sdev->scsi_level >= SCSI_3)
scsi_attach_vpd(sdev);
+ scsi_cdl_check(sdev);
+
sdev->max_queue_depth = sdev->queue_depth;
WARN_ON_ONCE(sdev->max_queue_depth > sdev->budget_map.depth);
sdev->sdev_bflags = *bflags;
@@ -1624,6 +1626,7 @@ void scsi_rescan_device(struct device *dev)
device_lock(dev);
scsi_attach_vpd(sdev);
+ scsi_cdl_check(sdev);
if (sdev->handler && sdev->handler->rescan)
sdev->handler->rescan(sdev);
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 603e8fcfcb8a..60317676e45f 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -670,6 +670,7 @@ sdev_rd_attr (scsi_level, "%d\n");
sdev_rd_attr (vendor, "%.8s\n");
sdev_rd_attr (model, "%.16s\n");
sdev_rd_attr (rev, "%.4s\n");
+sdev_rd_attr (cdl_supported, "%d\n");
static ssize_t
sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
@@ -1221,6 +1222,33 @@ static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
sdev_show_queue_ramp_up_period,
sdev_store_queue_ramp_up_period);
+static ssize_t sdev_show_cdl_enable(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+
+ return sysfs_emit(buf, "%d\n", (int)sdev->cdl_enable);
+}
+
+static ssize_t sdev_store_cdl_enable(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ bool v;
+
+ if (kstrtobool(buf, &v))
+ return -EINVAL;
+
+ ret = scsi_cdl_enable(to_scsi_device(dev), v);
+ if (ret)
+ return ret;
+
+ return count;
+}
+static DEVICE_ATTR(cdl_enable, S_IRUGO | S_IWUSR,
+ sdev_show_cdl_enable, sdev_store_cdl_enable);
+
static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int i)
{
@@ -1300,6 +1328,8 @@ static struct attribute *scsi_sdev_attrs[] = {
&dev_attr_preferred_path.attr,
#endif
&dev_attr_queue_ramp_up_period.attr,
+ &dev_attr_cdl_supported.attr,
+ &dev_attr_cdl_enable.attr,
REF_EVT(media_change),
REF_EVT(inquiry_change_reported),
REF_EVT(capacity_change_reported),
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index 74b99f2b0b74..d704c484a251 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -1245,7 +1245,7 @@ int sas_read_port_mode_page(struct scsi_device *sdev)
if (!buffer)
return -ENOMEM;
- error = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
+ error = scsi_mode_sense(sdev, 1, 0x19, 0, buffer, BUF_SIZE, 30*HZ, 3,
&mode_data, NULL);
if (error)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 5247abe4f266..84edbc0a5747 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -184,7 +184,7 @@ cache_type_store(struct device *dev, struct device_attribute *attr,
return count;
}
- if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
+ if (scsi_mode_sense(sdp, 0x08, 8, 0, buffer, sizeof(buffer), SD_TIMEOUT,
sdkp->max_retries, &data, NULL))
return -EINVAL;
len = min_t(size_t, sizeof(buffer), data.length - data.header_length -
@@ -1042,13 +1042,14 @@ static blk_status_t sd_setup_flush_cmnd(struct scsi_cmnd *cmd)
static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
sector_t lba, unsigned int nr_blocks,
- unsigned char flags)
+ unsigned char flags, unsigned int dld)
{
cmd->cmd_len = SD_EXT_CDB_SIZE;
cmd->cmnd[0] = VARIABLE_LENGTH_CMD;
cmd->cmnd[7] = 0x18; /* Additional CDB len */
cmd->cmnd[9] = write ? WRITE_32 : READ_32;
cmd->cmnd[10] = flags;
+ cmd->cmnd[11] = dld & 0x07;
put_unaligned_be64(lba, &cmd->cmnd[12]);
put_unaligned_be32(lba, &cmd->cmnd[20]); /* Expected Indirect LBA */
put_unaligned_be32(nr_blocks, &cmd->cmnd[28]);
@@ -1058,12 +1059,12 @@ static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
static blk_status_t sd_setup_rw16_cmnd(struct scsi_cmnd *cmd, bool write,
sector_t lba, unsigned int nr_blocks,
- unsigned char flags)
+ unsigned char flags, unsigned int dld)
{
cmd->cmd_len = 16;
cmd->cmnd[0] = write ? WRITE_16 : READ_16;
- cmd->cmnd[1] = flags;
- cmd->cmnd[14] = 0;
+ cmd->cmnd[1] = flags | ((dld >> 2) & 0x01);
+ cmd->cmnd[14] = (dld & 0x03) << 6;
cmd->cmnd[15] = 0;
put_unaligned_be64(lba, &cmd->cmnd[2]);
put_unaligned_be32(nr_blocks, &cmd->cmnd[10]);
@@ -1115,6 +1116,31 @@ static blk_status_t sd_setup_rw6_cmnd(struct scsi_cmnd *cmd, bool write,
return BLK_STS_OK;
}
+/*
+ * Check if a command has a duration limit set. If it does, and the target
+ * device supports CDL and the feature is enabled, return the limit
+ * descriptor index to use. Return 0 (no limit) otherwise.
+ */
+static int sd_cdl_dld(struct scsi_disk *sdkp, struct scsi_cmnd *scmd)
+{
+ struct scsi_device *sdp = sdkp->device;
+ int hint;
+
+ if (!sdp->cdl_supported || !sdp->cdl_enable)
+ return 0;
+
+ /*
+ * Use "no limit" if the request ioprio does not specify a duration
+ * limit hint.
+ */
+ hint = IOPRIO_PRIO_HINT(req_get_ioprio(scsi_cmd_to_rq(scmd)));
+ if (hint < IOPRIO_HINT_DEV_DURATION_LIMIT_1 ||
+ hint > IOPRIO_HINT_DEV_DURATION_LIMIT_7)
+ return 0;
+
+ return (hint - IOPRIO_HINT_DEV_DURATION_LIMIT_1) + 1;
+}
+
static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
{
struct request *rq = scsi_cmd_to_rq(cmd);
@@ -1126,6 +1152,7 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
unsigned int mask = logical_to_sectors(sdp, 1) - 1;
bool write = rq_data_dir(rq) == WRITE;
unsigned char protect, fua;
+ unsigned int dld;
blk_status_t ret;
unsigned int dif;
bool dix;
@@ -1175,6 +1202,7 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
dix = scsi_prot_sg_count(cmd);
dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
+ dld = sd_cdl_dld(sdkp, cmd);
if (dif || dix)
protect = sd_setup_protect_cmnd(cmd, dix, dif);
@@ -1183,10 +1211,10 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
if (protect && sdkp->protection_type == T10_PI_TYPE2_PROTECTION) {
ret = sd_setup_rw32_cmnd(cmd, write, lba, nr_blocks,
- protect | fua);
+ protect | fua, dld);
} else if (sdp->use_16_for_rw || (nr_blocks > 0xffff)) {
ret = sd_setup_rw16_cmnd(cmd, write, lba, nr_blocks,
- protect | fua);
+ protect | fua, dld);
} else if ((nr_blocks > 0xff) || (lba > 0x1fffff) ||
sdp->use_10_for_rw || protect) {
ret = sd_setup_rw10_cmnd(cmd, write, lba, nr_blocks,
@@ -2683,9 +2711,8 @@ sd_do_mode_sense(struct scsi_disk *sdkp, int dbd, int modepage,
if (sdkp->device->use_10_for_ms && len < 8)
len = 8;
- return scsi_mode_sense(sdkp->device, dbd, modepage, buffer, len,
- SD_TIMEOUT, sdkp->max_retries, data,
- sshdr);
+ return scsi_mode_sense(sdkp->device, dbd, modepage, 0, buffer, len,
+ SD_TIMEOUT, sdkp->max_retries, data, sshdr);
}
/*
@@ -2942,7 +2969,7 @@ static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
if (sdkp->protection_type == 0)
return;
- res = scsi_mode_sense(sdp, 1, 0x0a, buffer, 36, SD_TIMEOUT,
+ res = scsi_mode_sense(sdp, 1, 0x0a, 0, buffer, 36, SD_TIMEOUT,
sdkp->max_retries, &data, &sshdr);
if (res < 0 || !data.header_length ||
@@ -3131,7 +3158,7 @@ static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
return;
}
- if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
+ if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY, 0) < 0) {
struct scsi_vpd *vpd;
sdev->no_report_opcodes = 1;
@@ -3147,10 +3174,10 @@ static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
rcu_read_unlock();
}
- if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16) == 1)
+ if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME_16, 0) == 1)
sdkp->ws16 = 1;
- if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME) == 1)
+ if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, WRITE_SAME, 0) == 1)
sdkp->ws10 = 1;
}
@@ -3162,9 +3189,9 @@ static void sd_read_security(struct scsi_disk *sdkp, unsigned char *buffer)
return;
if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
- SECURITY_PROTOCOL_IN) == 1 &&
+ SECURITY_PROTOCOL_IN, 0) == 1 &&
scsi_report_opcode(sdev, buffer, SD_BUF_SIZE,
- SECURITY_PROTOCOL_OUT) == 1)
+ SECURITY_PROTOCOL_OUT, 0) == 1)
sdkp->security = 1;
}
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 12869e6d4ebd..cd5b08689c1a 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -825,7 +825,7 @@ static int get_capabilities(struct scsi_cd *cd)
scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr);
/* ask for mode page 0x2a */
- rc = scsi_mode_sense(cd->device, 0, 0x2a, buffer, ms_len,
+ rc = scsi_mode_sense(cd->device, 0, 0x2a, 0, buffer, ms_len,
SR_TIMEOUT, 3, &data, NULL);
if (rc < 0 || data.length > ms_len ||
diff --git a/include/linux/ata.h b/include/linux/ata.h
index c224dbddb9b2..792e10a09787 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -322,15 +322,21 @@ enum {
ATA_LOG_SATA_NCQ = 0x10,
ATA_LOG_NCQ_NON_DATA = 0x12,
ATA_LOG_NCQ_SEND_RECV = 0x13,
+ ATA_LOG_CDL = 0x18,
+ ATA_LOG_CDL_SIZE = ATA_SECT_SIZE,
ATA_LOG_IDENTIFY_DEVICE = 0x30,
+ ATA_LOG_SENSE_NCQ = 0x0F,
+ ATA_LOG_SENSE_NCQ_SIZE = ATA_SECT_SIZE * 2,
ATA_LOG_CONCURRENT_POSITIONING_RANGES = 0x47,
/* Identify device log pages: */
+ ATA_LOG_SUPPORTED_CAPABILITIES = 0x03,
+ ATA_LOG_CURRENT_SETTINGS = 0x04,
ATA_LOG_SECURITY = 0x06,
ATA_LOG_SATA_SETTINGS = 0x08,
ATA_LOG_ZONED_INFORMATION = 0x09,
- /* Identify device SATA settings log:*/
+ /* Identify device SATA settings log: */
ATA_LOG_DEVSLP_OFFSET = 0x30,
ATA_LOG_DEVSLP_SIZE = 0x08,
ATA_LOG_DEVSLP_MDAT = 0x00,
@@ -415,6 +421,8 @@ enum {
SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
+ SETFEATURES_CDL = 0x0d, /* Enable/disable cmd duration limits */
+
/* SETFEATURE Sector counts for SATA features */
SATA_FPDMA_OFFSET = 0x01, /* FPDMA non-zero buffer offsets */
SATA_FPDMA_AA = 0x02, /* FPDMA Setup FIS Auto-Activate */
@@ -425,6 +433,7 @@ enum {
SATA_DEVSLP = 0x09, /* Device Sleep */
SETFEATURE_SENSE_DATA = 0xC3, /* Sense Data Reporting feature */
+ SETFEATURE_SENSE_DATA_SUCC_NCQ = 0xC4, /* Sense Data for successful NCQ commands */
/* feature values for SET_MAX */
ATA_SET_MAX_ADDR = 0x00,
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 936e898016f8..bb573f87c8d1 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -171,6 +171,12 @@ typedef u16 blk_short_t;
*/
#define BLK_STS_OFFLINE ((__force blk_status_t)17)
+/*
+ * BLK_STS_DURATION_LIMIT is returned from the driver when the target device
+ * aborted the command because it exceeded one of its Command Duration Limits.
+ */
+#define BLK_STS_DURATION_LIMIT ((__force blk_status_t)18)
+
/**
* blk_path_error - returns true if error may be path related
* @error: status the request was completed with
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 311cd93377c7..5c8ef33b0af2 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -94,17 +94,19 @@ enum {
ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
ATA_DFLAG_NCQ_SEND_RECV = (1 << 11), /* device supports NCQ SEND and RECV */
ATA_DFLAG_NCQ_PRIO = (1 << 12), /* device supports NCQ priority */
- ATA_DFLAG_CFG_MASK = (1 << 13) - 1,
-
- ATA_DFLAG_PIO = (1 << 13), /* device limited to PIO mode */
- ATA_DFLAG_NCQ_OFF = (1 << 14), /* device limited to non-NCQ mode */
- ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
- ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
- ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
- ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
- ATA_DFLAG_INIT_MASK = (1 << 19) - 1,
-
- ATA_DFLAG_NCQ_PRIO_ENABLED = (1 << 19), /* Priority cmds sent to dev */
+ ATA_DFLAG_CDL = (1 << 13), /* supports cmd duration limits */
+ ATA_DFLAG_CFG_MASK = (1 << 14) - 1,
+
+ ATA_DFLAG_PIO = (1 << 14), /* device limited to PIO mode */
+ ATA_DFLAG_NCQ_OFF = (1 << 15), /* device limited to non-NCQ mode */
+ ATA_DFLAG_SLEEPING = (1 << 16), /* device is sleeping */
+ ATA_DFLAG_DUBIOUS_XFER = (1 << 17), /* data transfer not verified */
+ ATA_DFLAG_NO_UNLOAD = (1 << 18), /* device doesn't support unload */
+ ATA_DFLAG_UNLOCK_HPA = (1 << 19), /* unlock HPA */
+ ATA_DFLAG_INIT_MASK = (1 << 20) - 1,
+
+ ATA_DFLAG_NCQ_PRIO_ENABLED = (1 << 20), /* Priority cmds sent to dev */
+ ATA_DFLAG_CDL_ENABLED = (1 << 21), /* cmd duration limits is enabled */
ATA_DFLAG_DETACH = (1 << 24),
ATA_DFLAG_DETACHED = (1 << 25),
ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
@@ -115,7 +117,8 @@ enum {
ATA_DFLAG_FEATURES_MASK = (ATA_DFLAG_TRUSTED | ATA_DFLAG_DA | \
ATA_DFLAG_DEVSLP | ATA_DFLAG_NCQ_SEND_RECV | \
- ATA_DFLAG_NCQ_PRIO | ATA_DFLAG_FUA),
+ ATA_DFLAG_NCQ_PRIO | ATA_DFLAG_FUA | \
+ ATA_DFLAG_CDL),
ATA_DEV_UNKNOWN = 0, /* unknown device */
ATA_DEV_ATA = 1, /* ATA device */
@@ -206,10 +209,12 @@ enum {
ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
+ ATA_QCFLAG_HAS_CDL = (1 << 8), /* qc has CDL a descriptor set */
ATA_QCFLAG_EH = (1 << 16), /* cmd aborted and owned by EH */
ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
+ ATA_QCFLAG_EH_SUCCESS_CMD = (1 << 19), /* EH should fetch sense for this successful cmd */
/* host set flags */
ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
@@ -308,8 +313,10 @@ enum {
ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
ATA_EH_ENABLE_LINK = (1 << 3),
ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
+ ATA_EH_GET_SUCCESS_SENSE = (1 << 6), /* Get sense data for successful cmd */
- ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
+ ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK |
+ ATA_EH_GET_SUCCESS_SENSE,
ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
ATA_EH_ENABLE_LINK,
@@ -709,6 +716,9 @@ struct ata_device {
/* Concurrent positioning ranges */
struct ata_cpr_log *cpr_log;
+ /* Command Duration Limits log support */
+ u8 cdl[ATA_LOG_CDL_SIZE];
+
/* error history */
int spdn_cnt;
/* ering is CLEAR_END, read comment above CLEAR_END */
@@ -860,6 +870,7 @@ struct ata_port {
struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
#endif
/* owned by EH */
+ u8 *ncq_sense_buf;
u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
};
@@ -1178,6 +1189,7 @@ extern int sata_link_hardreset(struct ata_link *link,
bool *online, int (*check_ready)(struct ata_link *));
extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
unsigned long deadline);
+extern int ata_eh_read_sense_success_ncq_log(struct ata_link *link);
extern void ata_eh_analyze_ncq_error(struct ata_link *link);
#else
static inline const unsigned long *
@@ -1215,6 +1227,10 @@ static inline int sata_link_resume(struct ata_link *link,
{
return -EOPNOTSUPP;
}
+static inline int ata_eh_read_sense_success_ncq_log(struct ata_link *link)
+{
+ return -EOPNOTSUPP;
+}
static inline void ata_eh_analyze_ncq_error(struct ata_link *link) { }
#endif
extern int sata_link_debounce(struct ata_link *link,
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index c2cb5f69635c..526def14e7fb 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -52,6 +52,11 @@ struct scsi_pointer {
#define SCMD_TAGGED (1 << 0)
#define SCMD_INITIALIZED (1 << 1)
#define SCMD_LAST (1 << 2)
+/*
+ * libata uses SCSI EH to fetch sense data for successful commands.
+ * SCSI EH should not overwrite scmd->result when SCMD_FORCE_EH_SUCCESS is set.
+ */
+#define SCMD_FORCE_EH_SUCCESS (1 << 3)
#define SCMD_FAIL_IF_RECOVERING (1 << 4)
/* flags preserved across unprep / reprep */
#define SCMD_PRESERVED_FLAGS (SCMD_INITIALIZED | SCMD_FAIL_IF_RECOVERING)
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index f10a008e5bfa..b2cdb078b7bd 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -218,6 +218,9 @@ struct scsi_device {
unsigned silence_suspend:1; /* Do not print runtime PM related messages */
unsigned no_vpd_size:1; /* No VPD size reported in header */
+ unsigned cdl_supported:1; /* Command duration limits supported */
+ unsigned cdl_enable:1; /* Enable/disable Command duration limits */
+
unsigned int queue_stopped; /* request queue is quiesced */
bool offline_already; /* Device offline message logged */
@@ -364,6 +367,8 @@ extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh);
extern void scsi_remove_device(struct scsi_device *);
extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh);
void scsi_attach_vpd(struct scsi_device *sdev);
+void scsi_cdl_check(struct scsi_device *sdev);
+int scsi_cdl_enable(struct scsi_device *sdev, bool enable);
extern struct scsi_device *scsi_device_from_queue(struct request_queue *q);
extern int __must_check scsi_device_get(struct scsi_device *);
@@ -421,10 +426,10 @@ extern int scsi_track_queue_full(struct scsi_device *, int);
extern int scsi_set_medium_removal(struct scsi_device *, char);
-extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
- unsigned char *buffer, int len, int timeout,
- int retries, struct scsi_mode_data *data,
- struct scsi_sense_hdr *);
+int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
+ int subpage, unsigned char *buffer, int len, int timeout,
+ int retries, struct scsi_mode_data *data,
+ struct scsi_sense_hdr *);
extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
unsigned char *buffer, int len, int timeout,
int retries, struct scsi_mode_data *data,
@@ -433,8 +438,9 @@ extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
int retries, struct scsi_sense_hdr *sshdr);
extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf,
int buf_len);
-extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
- unsigned int len, unsigned char opcode);
+int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
+ unsigned int len, unsigned char opcode,
+ unsigned short sa);
extern int scsi_device_set_state(struct scsi_device *sdev,
enum scsi_device_state state);
extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,
diff --git a/include/uapi/linux/ioprio.h b/include/uapi/linux/ioprio.h
index f70f2596a6bf..4c4806e8230b 100644
--- a/include/uapi/linux/ioprio.h
+++ b/include/uapi/linux/ioprio.h
@@ -17,7 +17,7 @@
((data) & IOPRIO_PRIO_MASK))
/*
- * These are the io priority groups as implemented by the BFQ and mq-deadline
+ * These are the io priority classes as implemented by the BFQ and mq-deadline
* schedulers. RT is the realtime class, it always gets premium service. For
* ATA disks supporting NCQ IO priority, RT class IOs will be processed using
* high priority NCQ commands. BE is the best-effort scheduling class, the
@@ -32,11 +32,20 @@ enum {
};
/*
- * The RT and BE priority classes both support up to 8 priority levels.
+ * The RT and BE priority classes both support up to 8 priority levels that
+ * can be specified using the lower 3-bits of the priority data.
*/
-#define IOPRIO_NR_LEVELS 8
-#define IOPRIO_BE_NR IOPRIO_NR_LEVELS
+#define IOPRIO_LEVEL_NR_BITS 3
+#define IOPRIO_NR_LEVELS (1 << IOPRIO_LEVEL_NR_BITS)
+#define IOPRIO_LEVEL_MASK (IOPRIO_NR_LEVELS - 1)
+#define IOPRIO_PRIO_LEVEL(ioprio) ((ioprio) & IOPRIO_LEVEL_MASK)
+#define IOPRIO_BE_NR IOPRIO_NR_LEVELS
+
+/*
+ * Possible values for the "which" argument of the ioprio_get() and
+ * ioprio_set() system calls (see "man ioprio_set").
+ */
enum {
IOPRIO_WHO_PROCESS = 1,
IOPRIO_WHO_PGRP,
@@ -44,9 +53,58 @@ enum {
};
/*
- * Fallback BE priority level.
+ * Fallback BE class priority level.
*/
#define IOPRIO_NORM 4
#define IOPRIO_BE_NORM IOPRIO_NORM
+/*
+ * The 10 bits between the priority class and the priority level are used to
+ * optionally define I/O hints for any combination of I/O priority class and
+ * level. Depending on the kernel configuration, I/O scheduler being used and
+ * the target I/O device being used, hints can influence how I/Os are processed
+ * without affecting the I/O scheduling ordering defined by the I/O priority
+ * class and level.
+ */
+#define IOPRIO_HINT_SHIFT IOPRIO_LEVEL_NR_BITS
+#define IOPRIO_HINT_NR_BITS 10
+#define IOPRIO_NR_HINTS (1 << IOPRIO_HINT_NR_BITS)
+#define IOPRIO_HINT_MASK (IOPRIO_NR_HINTS - 1)
+#define IOPRIO_PRIO_HINT(ioprio) \
+ (((ioprio) >> IOPRIO_HINT_SHIFT) & IOPRIO_HINT_MASK)
+
+/*
+ * Alternate macro for IOPRIO_PRIO_VALUE() to define an I/O priority with
+ * a class, level and hint.
+ */
+#define IOPRIO_PRIO_VALUE_HINT(class, level, hint) \
+ ((((class) & IOPRIO_CLASS_MASK) << IOPRIO_CLASS_SHIFT) | \
+ (((hint) & IOPRIO_HINT_MASK) << IOPRIO_HINT_SHIFT) | \
+ ((level) & IOPRIO_LEVEL_MASK))
+
+/*
+ * I/O hints.
+ */
+enum {
+ /* No hint */
+ IOPRIO_HINT_NONE = 0,
+
+ /*
+ * Device command duration limits: indicate to the device a desired
+ * duration limit for the commands that will be used to process an I/O.
+ * These will currently only be effective for SCSI and ATA devices that
+ * support the command duration limits feature. If this feature is
+ * enabled, then the commands issued to the device to process an I/O with
+ * one of these hints set will have the duration limit index (dld field)
+ * set to the value of the hint.
+ */
+ IOPRIO_HINT_DEV_DURATION_LIMIT_1 = 1,
+ IOPRIO_HINT_DEV_DURATION_LIMIT_2 = 2,
+ IOPRIO_HINT_DEV_DURATION_LIMIT_3 = 3,
+ IOPRIO_HINT_DEV_DURATION_LIMIT_4 = 4,
+ IOPRIO_HINT_DEV_DURATION_LIMIT_5 = 5,
+ IOPRIO_HINT_DEV_DURATION_LIMIT_6 = 6,
+ IOPRIO_HINT_DEV_DURATION_LIMIT_7 = 7,
+};
+
#endif /* _UAPI_LINUX_IOPRIO_H */
generated by cgit (git 2.34.1) at 2024-05-14 12:10:55 +0000