Commit 856c4663 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Tejun Heo
Browse files

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: default avatarShaun Tancheff <shaun.tancheff@seagate.com>
Tested-by: default avatarShaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 284b3b77

drivers/ata/libata-scsi.c

+10 −9
Original line number Diff line number Diff line
@@ -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;

}

include/linux/ata.h

+5 −0
Original line number Diff line number Diff line
@@ -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. */

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