Commit b142eb65 authored by Jeff Garzik's avatar Jeff Garzik
Browse files

[libata] SCSI VPD page 0x83 fixes 



Original patch (and description) by Douglas Gilbert, with minor fixes
and API updates from me.

Changelog:
  - make existing libata VPD device identification page (0x83)
    supply the ATA serial number in the libata "vendor
    specific" designator (from Chris Paulson-Ellis)
  - add a "t10 vendor id based" designator as defined in
    SAT rev 08 (section 10.3.4.2.3) that supplies ATA
    model and serial numbers
  - make the libata VPD page 0x83 more extensible (for
    adding more designators in the future).
  - rename EVPD to VPD in various places. Enable Vital
    Product Data (EVPD) is a bit in the INQUIRY cdb.

Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent e0f4ab8a

drivers/scsi/libata-scsi.c

+41 −18
Original line number Diff line number Diff line
@@ -1542,7 +1542,7 @@ void ata_scsi_rbuf_fill(struct ata_scsi_args *args, 
 *	@buflen: Response buffer length.

 *

 *	Returns standard device identification data associated

 *	with non-EVPD INQUIRY command output.

 *	with non-VPD INQUIRY command output.

 *

 *	LOCKING:

 *	spin_lock_irqsave(host_set lock)
@@ -1593,12 +1593,12 @@ unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, 
}



/**

 *	ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages

 *	ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages

 *	@args: device IDENTIFY data / SCSI command of interest.

 *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.

 *	@buflen: Response buffer length.

 *

 *	Returns list of inquiry EVPD pages available.

 *	Returns list of inquiry VPD pages available.

 *

 *	LOCKING:

 *	spin_lock_irqsave(host_set lock)
@@ -1612,7 +1612,7 @@ unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, 
		0x80,	/* page 0x80, unit serial no page */

		0x83	/* page 0x83, device ident page */

	};

	rbuf[3] = sizeof(pages);	/* number of supported EVPD pages */

	rbuf[3] = sizeof(pages);	/* number of supported VPD pages */



	if (buflen > 6)

		memcpy(rbuf + 4, pages, sizeof(pages));
@@ -1621,7 +1621,7 @@ unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, 
}



/**

 *	ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number

 *	ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number

 *	@args: device IDENTIFY data / SCSI command of interest.

 *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.

 *	@buflen: Response buffer length.
@@ -1650,16 +1650,16 @@ unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, 
	return 0;

}



static const char * const inq_83_str = "Linux ATA-SCSI simulator";



/**

 *	ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity

 *	ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity

 *	@args: device IDENTIFY data / SCSI command of interest.

 *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.

 *	@buflen: Response buffer length.

 *

 *	Returns device identification.  Currently hardcoded to

 *	return "Linux ATA-SCSI simulator".

 *	Yields two logical unit device identification designators:

 *	 - vendor specific ASCII containing the ATA serial number

 *	 - SAT defined "t10 vendor id based" containing ASCII vendor

 *	   name ("ATA     "), model and serial numbers.

 *

 *	LOCKING:

 *	spin_lock_irqsave(host_set lock)
@@ -1668,16 +1668,39 @@ static const char * const inq_83_str = "Linux ATA-SCSI simulator"; 
unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,

			      unsigned int buflen)

{

	rbuf[1] = 0x83;			/* this page code */

	rbuf[3] = 4 + strlen(inq_83_str);	/* page len */

	int num;

	const int sat_model_serial_desc_len = 68;

	const int ata_model_byte_len = 40;



	/* our one and only identification descriptor (vendor-specific) */

	if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) {

		rbuf[4 + 0] = 2;	/* code set: ASCII */

		rbuf[4 + 3] = strlen(inq_83_str);

		memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str));

	rbuf[1] = 0x83;			/* this page code */

	num = 4;



	if (buflen > (ATA_SERNO_LEN + num + 3)) {

		/* piv=0, assoc=lu, code_set=ACSII, designator=vendor */

		rbuf[num + 0] = 2;	

		rbuf[num + 3] = ATA_SERNO_LEN;

		num += 4;

		ata_id_string(args->id, (unsigned char *) rbuf + num,

			      ATA_ID_SERNO_OFS, ATA_SERNO_LEN);

		num += ATA_SERNO_LEN;

	}

	if (buflen > (sat_model_serial_desc_len + num + 3)) {

		/* SAT defined lu model and serial numbers descriptor */

		/* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */

		rbuf[num + 0] = 2;	

		rbuf[num + 1] = 1;	

		rbuf[num + 3] = sat_model_serial_desc_len;

		num += 4;

		memcpy(rbuf + num, "ATA     ", 8);

		num += 8;

		ata_id_string(args->id, (unsigned char *) rbuf + num,

			      ATA_ID_PROD_OFS, ata_model_byte_len);

		num += ata_model_byte_len;

		ata_id_string(args->id, (unsigned char *) rbuf + num,

			      ATA_ID_SERNO_OFS, ATA_SERNO_LEN);

		num += ATA_SERNO_LEN;

	}



	rbuf[3] = num - 4;    /* page len (assume less than 256 bytes) */

	return 0;

}

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