Hello.
On 4/25/2016 1:45 PM, Hannes Reinecke wrote:
Device-managed ZAC devices just set the zoned capabilities field
in INQUIRY byte 69 (cf ACS-4). This corresponds to the 'zoned'
field in the block device characteristics VPD page.
As this is only defined in SPC-5/SBC-4 we also need to update
the supported SCSI version descriptor.
Reviewed-by: Shaun Tancheff <[email protected]>
Tested-by: Shaun Tancheff <[email protected]>
Signed-off-by: Hannes Reinecke <[email protected]>
---
drivers/ata/libata-scsi.c | 19 ++++++++++---------
include/linux/ata.h | 5 +++++
2 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 43403aa..96abd42 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
[...]
@@ -2322,12 +2320,15 @@ static unsigned int ata_scsiop_inq_b1(struct
ata_scsi_args *args, u8 *rbuf)
{
int form_factor = ata_id_form_factor(args->id);
int media_rotation_rate = ata_id_rotation_rate(args->id);
+ u8 zoned = ata_id_zoned_cap(args->id);
rbuf[1] = 0xb1;
rbuf[3] = 0x3c;
rbuf[4] = media_rotation_rate >> 8;
rbuf[5] = media_rotation_rate;
rbuf[7] = form_factor;
+ if (zoned)
+ rbuf[8] = (zoned << 4);
Parens not needed here...
[...]
diff --git a/include/linux/ata.h b/include/linux/ata.h
index e627032..ac1cb93 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -935,6 +935,11 @@ static inline bool ata_id_is_ssd(const u16 *id)
return id[ATA_ID_ROT_SPEED] == 0x01;
}
+static inline u8 ata_id_zoned_cap(const u16 *id)
+{
+ return (id[ATA_ID_ADDITIONAL_SUPP] & 0x3);
And here as well...
[...]
MBR, Sergei
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