summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAlok Pandey <pandey.alok@samsung.com>2015-08-26 08:56:14 -0600
committerJens Axboe <axboe@fb.com>2015-08-26 08:58:09 -0600
commite19b127f5b76ec03b9c52b64f117dc75bb39eda1 (patch)
treeffd56fc81dbcec7859d49bb3e3921dc098567535
parente3f879bf1ea3e03f433d292b0114807785f0754b (diff)
NVMe: Using PRACT bit to generate and verify PI by controllerfor-4.3/drivers
This patch enables the PRCHK and reftag support when PRACT bit is set, and block layer integrity is disabled. Signed-off-by: Alok Pandey <pandey.alok@samsung.com> Reviewed-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
-rw-r--r--drivers/block/nvme-core.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index caad00fbf820..8de3de010741 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -813,8 +813,7 @@ static int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod,
cmnd.rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req)));
cmnd.rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1);
- if (blk_integrity_rq(req)) {
- cmnd.rw.metadata = cpu_to_le64(sg_dma_address(iod->meta_sg));
+ if (ns->ms) {
switch (ns->pi_type) {
case NVME_NS_DPS_PI_TYPE3:
control |= NVME_RW_PRINFO_PRCHK_GUARD;
@@ -827,8 +826,12 @@ static int nvme_submit_iod(struct nvme_queue *nvmeq, struct nvme_iod *iod,
nvme_block_nr(ns, blk_rq_pos(req)));
break;
}
- } else if (ns->ms)
- control |= NVME_RW_PRINFO_PRACT;
+ if (blk_integrity_rq(req))
+ cmnd.rw.metadata =
+ cpu_to_le64(sg_dma_address(iod->meta_sg));
+ else
+ control |= NVME_RW_PRINFO_PRACT;
+ }
cmnd.rw.control = cpu_to_le16(control);
cmnd.rw.dsmgmt = cpu_to_le32(dsmgmt);
@@ -2037,7 +2040,7 @@ static int nvme_revalidate_disk(struct gendisk *disk)
!ns->ext)
nvme_init_integrity(ns);
- if (ns->ms && !blk_get_integrity(disk))
+ if (ns->ms && !(ns->ms == 8 && ns->pi_type) && !blk_get_integrity(disk))
set_capacity(disk, 0);
else
set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9));