On 10-08-23 04:32 AM, Tejun Heo wrote:
On 08/19/2010 05:48 PM, Martin K. Petersen wrote:Until now identifying that a device supports WRITE SAME(16) with the UNMAP bit set has been black magic. Implement support for the new (SBC3 r24) Thin Provisioning VPD page and the TPWS bit. Signed-off-by: Martin K. Petersen<martin.petersen@xxxxxxxxxx> --- drivers/ata/libata-scsi.c | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index a54273d..e280ae6 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2001,6 +2001,7 @@ static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf) 0x89, /* page 0x89, ata info page */ 0xb0, /* page 0xb0, block limits page */ 0xb1, /* page 0xb1, block device characteristics page */ + 0xb2, /* page 0xb2, thin provisioning page */ }; rbuf[3] = sizeof(pages); /* number of supported VPD pages */ @@ -2172,6 +2173,15 @@ static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf) return 0; } +static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf) +{ + rbuf[1] = 0xb1; + rbuf[3] = 0x3c; + rbuf[5] = 1<< 6; /* TPWS */I would love a bit more documentation here.
Yes, that style comes from my code in scsi_debug and some of my utilities. Recently I added some more documentation, just prior the the function: /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */ I see no point in commenting the individual code lines. Just follow that reference ... And when I do then I see that rbuf[3] should be 4 (not 0x3c) unless the DP bit is set. Doug Gilbert -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
