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.
Thanks.
--
tejun
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