diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2024-01-30 13:48:35 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2024-02-26 21:37:26 -0500 |
| commit | 96b171d6dba6a66c63312f35e3ac6465b2c2ca94 (patch) | |
| tree | d127fd8725eb6f08b356b43adb5dd6dde2715890 /drivers/scsi/sd.c | |
| parent | 449813515d3e5efec85206bb91588a6249a421a3 (diff) | |
scsi: core: Query the Block Limits Extension VPD page
Parse the Reduced Stream Control Supported (RSCS) bit from the block limits
extension VPD page. The RSCS bit is defined in SBC-5 r05
(https://www.t10.org/cgi-bin/ac.pl?t=f&f=sbc5r05.pdf).
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240130214911.1863909-10-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/sd.c')
| -rw-r--r-- | drivers/scsi/sd.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 0833b3e6aa6e..86b819fa04d9 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3108,6 +3108,18 @@ static void sd_read_block_limits(struct scsi_disk *sdkp) rcu_read_unlock(); } +/* Parse the Block Limits Extension VPD page (0xb7) */ +static void sd_read_block_limits_ext(struct scsi_disk *sdkp) +{ + struct scsi_vpd *vpd; + + rcu_read_lock(); + vpd = rcu_dereference(sdkp->device->vpd_pgb7); + if (vpd && vpd->len >= 2) + sdkp->rscs = vpd->data[5] & 1; + rcu_read_unlock(); +} + /** * sd_read_block_characteristics - Query block dev. characteristics * @sdkp: disk to query @@ -3459,6 +3471,7 @@ static int sd_revalidate_disk(struct gendisk *disk) if (scsi_device_supports_vpd(sdp)) { sd_read_block_provisioning(sdkp); sd_read_block_limits(sdkp); + sd_read_block_limits_ext(sdkp); sd_read_block_characteristics(sdkp); sd_zbc_read_zones(sdkp, buffer); sd_read_cpr(sdkp); |