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libata: support device-managed ZAC devices 

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 <shaun.tancheff@seagate.com>
Tested-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Hannes Reinecke 2016-04-25 12:45:55 +02:00 committed by Tejun Heo
parent 284b3b77ea
commit 856c466393
2 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/ata/libata-scsi.c
View File

@ -2082,14 +2082,14 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
0x00,
0xA0, /* SAM-5 (no version claimed) */
0x04,
0xC0, /* SBC-3 (no version claimed) */
0x06,
0x00, /* SBC-4 (no version claimed) */
0x04,
0x60, /* SPC-4 (no version claimed) */
0x05,
0xC0, /* SPC-5 (no version claimed) */
0x60,
0x20, /* ZBC (no version claimed) */
0x24, /* ZBC r05 */
};
u8 hdr[] = {
@ -2109,10 +2109,8 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
(args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
hdr[1] |= (1 << 7);
if (args->dev->class == ATA_DEV_ZAC) {
if (args->dev->class == ATA_DEV_ZAC)
hdr[0] = TYPE_ZBC;
hdr[2] = 0x6; /* ZBC is defined in SPC-4 */
}
memcpy(rbuf, hdr, sizeof(hdr));
memcpy(&rbuf[8], "ATA ", 8);
@ -2126,7 +2124,7 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
if (rbuf[32] == 0 || rbuf[32] == ' ')
memcpy(&rbuf[32], "n/a ", 4);
if (args->dev->class == ATA_DEV_ZAC)
if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
else
memcpy(rbuf + 58, versions, sizeof(versions));
@ -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);
return 0;
}

5
include/linux/ata.h
View File

@ -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);
}
static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
{
/* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */