[libata] Add support for VPD page b1

SCSI VPD page b1 reports the nominal rotation speed and physical size
of the device.  Devices that conform to ATA-8 can return this information
in words 217 and 168 of the identify data.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index b578b11caa7b..479c29e2e25c 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1857,7 +1857,9 @@ static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
         const u8 pages[] = {
                 0x00,   /* page 0x00, this page */
                 0x80,   /* page 0x80, unit serial no page */
-                0x83    /* page 0x83, device ident page */
+                0x83,   /* page 0x83, device ident page */
+                0x89,   /* page 0x89, ata info page */
+                0xb1,   /* page 0xb1, block device characteristics page */
         };
 
         rbuf[3] = sizeof(pages);        /* number of supported VPD pages */
@@ -1978,6 +1980,19 @@ static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
         return 0;
 }
 
+static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
+{
+        rbuf[1] = 0xb1;
+        rbuf[3] = 0x3c;
+        if (ata_id_major_version(args->id) > 7) {
+                rbuf[4] = args->id[217] >> 8;
+                rbuf[5] = args->id[217];
+                rbuf[7] = args->id[168] & 0xf;
+        }
+
+        return 0;
+}
+
 /**
  *      ata_scsiop_noop - Command handler that simply returns success.
  *      @args: device IDENTIFY data / SCSI command of interest.
@@ -2999,6 +3014,9 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
                 case 0x89:
                         ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
                         break;
+                case 0xb1:
+                        ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
+                        break;
                 default:
                         ata_scsi_invalid_field(cmd, done);
                         break;