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authorDamien Le Moal <dlemoal@kernel.org>2023-05-11 04:13:47 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2023-05-23 00:05:20 +0300
commit62e4a60e0cdb540b314061469e025fd834ff300c (patch)
tree6f9f4ab15b76b73c9c3575aec3ff3740b699421d /drivers/ata/libata-core.c
parent24aeebbf8ea94b5c0cde06350b06e79f5beb28ae (diff)
downloadlinux-62e4a60e0cdb540b314061469e025fd834ff300c.tar.xz
scsi: ata: libata: Detect support for command duration limits
Use the supported capabilities identify device data log page to detect if a device supports the command duration limits feature. For devices supporting this feature, set the device flag ATA_DFLAG_CDL. To support SCSI-ATA translation, retrieve the command duration limits log page 18h and cache this page content using the cdl array added to the ata_device data structure. Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Co-developed-by: Niklas Cassel <niklas.cassel@wdc.com> Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com> Link: https://lore.kernel.org/r/20230511011356.227789-15-nks@flawful.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ata/libata-core.c')
-rw-r--r--drivers/ata/libata-core.c52
1 files changed, 51 insertions, 1 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 8bf612bdd61a..83fe037f63b9 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2367,6 +2367,54 @@ 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;
+ 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))
+ 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");
+
+ /*
+ * 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;
+}
+
static int ata_dev_config_lba(struct ata_device *dev)
{
const u16 *id = dev->id;
@@ -2534,13 +2582,14 @@ 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 +2751,7 @@ 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)