diff options
| author | Vinayak Kale <vinayak.kale@seagate.com> | 2015-10-27 08:49:15 +0300 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2015-10-27 09:09:01 +0300 |
| commit | ee7fb331c3ac642b6bf8b9dc6f23a6a2e389d717 (patch) | |
| tree | 2c2e9b9329409e0aa338f8a71bb0403ad596ba4d /drivers/ata/libata-scsi.c | |
| parent | eb351031a15c4a83b9955aadad783c6672ab8868 (diff) | |
| download | linux-ee7fb331c3ac642b6bf8b9dc6f23a6a2e389d717.tar.xz | |
libata: add support for NCQ commands for SG interface
This patch is needed to make NCQ commands with FPDMA protocol value
(eg READ/WRITE FPDMA) work over SCSI Generic (SG) interface.
Signed-off-by: Vinayak Kale <vinayak.kale@seagate.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/libata-scsi.c')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 560cedea2b40..8dffa9990985 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2912,12 +2912,14 @@ ata_scsi_map_proto(u8 byte1) case 5: /* PIO Data-out */ return ATA_PROT_PIO; + case 12: /* FPDMA */ + return ATA_PROT_NCQ; + case 0: /* Hard Reset */ case 1: /* SRST */ case 8: /* Device Diagnostic */ case 9: /* Device Reset */ case 7: /* DMA Queued */ - case 12: /* FPDMA */ case 15: /* Return Response Info */ default: /* Reserved */ break; @@ -2990,6 +2992,10 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc) tf->command = cdb[9]; } + /* For NCQ commands with FPDMA protocol, copy the tag value */ + if (tf->protocol == ATA_PROT_NCQ) + tf->nsect = qc->tag << 3; + /* enforce correct master/slave bit */ tf->device = dev->devno ? tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; |