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authorArun Easi <arun.easi@qlogic.com>2010-07-23 15:28:38 +0500
committerJames Bottomley <James.Bottomley@suse.de>2010-07-28 09:06:18 -0500
commit0c470874858e0075f420dcfb3c3570b2057de275 (patch)
treefcf71bf85fa95567727187f32de29ff3ddb54827 /drivers/scsi/qla2xxx/qla_iocb.c
parent3dbe756a66afbec6487068d4213ecccc3a18807f (diff)
[SCSI] qla2xxx: T10 DIF Type 2 support
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com> Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_iocb.c')
-rw-r--r--drivers/scsi/qla2xxx/qla_iocb.c35
1 files changed, 31 insertions, 4 deletions
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index d2b299f2c503..4e4c21fafe3a 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -712,6 +712,25 @@ qla24xx_set_t10dif_tags(struct scsi_cmnd *cmd, struct fw_dif_context *pkt,
* match LBA in CDB + N
*/
case SCSI_PROT_DIF_TYPE2:
+ if (!ql2xenablehba_err_chk)
+ break;
+
+ if (scsi_prot_sg_count(cmd)) {
+ spt = page_address(sg_page(scsi_prot_sglist(cmd))) +
+ scsi_prot_sglist(cmd)[0].offset;
+ pkt->app_tag = swab32(spt->app_tag);
+ pkt->app_tag_mask[0] = 0xff;
+ pkt->app_tag_mask[1] = 0xff;
+ }
+
+ pkt->ref_tag = cpu_to_le32((uint32_t)
+ (0xffffffff & scsi_get_lba(cmd)));
+
+ /* enable ALL bytes of the ref tag */
+ pkt->ref_tag_mask[0] = 0xff;
+ pkt->ref_tag_mask[1] = 0xff;
+ pkt->ref_tag_mask[2] = 0xff;
+ pkt->ref_tag_mask[3] = 0xff;
break;
/* For Type 3 protection: 16 bit GUARD only */
@@ -1062,7 +1081,7 @@ qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
total_bytes = data_bytes;
dif_bytes = 0;
blk_size = cmd->device->sector_size;
- if (scsi_get_prot_type(cmd) == SCSI_PROT_DIF_TYPE1) {
+ if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
dif_bytes = (data_bytes / blk_size) * 8;
total_bytes += dif_bytes;
}
@@ -1100,6 +1119,12 @@ qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
vha->host_no, dif_bytes, dif_bytes, total_bytes, total_bytes,
crc_ctx_pkt->blk_size, crc_ctx_pkt->blk_size));
+ if (!data_bytes || cmd->sc_data_direction == DMA_NONE) {
+ DEBUG18(printk(KERN_INFO "%s: Zero data bytes or DMA-NONE %d\n",
+ __func__, data_bytes));
+ cmd_pkt->byte_count = __constant_cpu_to_le32(0);
+ return QLA_SUCCESS;
+ }
/* Walks data segments */
cmd_pkt->control_flags |=
@@ -1310,9 +1335,11 @@ qla24xx_dif_start_scsi(srb_t *sp)
#define QDSS_GOT_Q_SPACE BIT_0
- /* Only process protection in this routine */
- if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL)
- return qla24xx_start_scsi(sp);
+ /* Only process protection or >16 cdb in this routine */
+ if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
+ if (cmd->cmd_len <= 16)
+ return qla24xx_start_scsi(sp);
+ }
/* Setup device pointers. */