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authorTejun Heo <htejun@gmail.com>2006-05-15 15:57:40 +0400
committerTejun Heo <htejun@gmail.com>2006-05-15 15:57:40 +0400
commite61e067227bc76b4d9411a50d735c9d87f27b0e2 (patch)
tree007d22539b24aa6ae8e258af6e22a4187490a4c1 /drivers/scsi/libata-scsi.c
parent96bd39ec295e49443c8b0c25a6b69fdace18780f (diff)
downloadlinux-e61e067227bc76b4d9411a50d735c9d87f27b0e2.tar.xz
[PATCH] libata: implement qc->result_tf
Add qc->result_tf and ATA_QCFLAG_RESULT_TF. This moves the responsibility of loading result TF from post-compltion path to qc execution path. qc->result_tf is loaded if explicitly requested or the qc failsa. This allows more efficient completion implementation and correct handling of result TF for controllers which don't have global TF representation such as sil3124/32. Signed-off-by: Tejun Heo <htejun@gmail.com>
Diffstat (limited to 'drivers/scsi/libata-scsi.c')
-rw-r--r--drivers/scsi/libata-scsi.c18
1 files changed, 7 insertions, 11 deletions
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index b0c83c28d578..ce90b6352a81 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -537,7 +537,7 @@ void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_taskfile *tf = &qc->tf;
+ struct ata_taskfile *tf = &qc->result_tf;
unsigned char *sb = cmd->sense_buffer;
unsigned char *desc = sb + 8;
@@ -608,7 +608,7 @@ void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_taskfile *tf = &qc->tf;
+ struct ata_taskfile *tf = &qc->result_tf;
unsigned char *sb = cmd->sense_buffer;
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
@@ -1199,14 +1199,11 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
*/
if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
((cdb[2] & 0x20) || need_sense)) {
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
ata_gen_ata_desc_sense(qc);
} else {
if (!need_sense) {
cmd->result = SAM_STAT_GOOD;
} else {
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
-
/* TODO: decide which descriptor format to use
* for 48b LBA devices and call that here
* instead of the fixed desc, which is only
@@ -1217,10 +1214,8 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
}
}
- if (need_sense) {
- /* The ata_gen_..._sense routines fill in tf */
- ata_dump_status(qc->ap->id, &qc->tf);
- }
+ if (need_sense)
+ ata_dump_status(qc->ap->id, &qc->result_tf);
qc->scsidone(cmd);
@@ -2004,7 +1999,6 @@ static void atapi_sense_complete(struct ata_queued_cmd *qc)
* a sense descriptors, since that's only
* correct for ATA, not ATAPI
*/
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
ata_gen_ata_desc_sense(qc);
}
@@ -2080,7 +2074,6 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc)
* a sense descriptors, since that's only
* correct for ATA, not ATAPI
*/
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
ata_gen_ata_desc_sense(qc);
} else {
u8 *scsicmd = cmd->cmnd;
@@ -2361,6 +2354,9 @@ ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
*/
qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
+ /* request result TF */
+ qc->flags |= ATA_QCFLAG_RESULT_TF;
+
return 0;
invalid_fld: