NVMe: Using PRACT bit to generate and verify PI by controller
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>
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index caad00f..8de3de0 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -813,8 +813,7 @@
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 @@
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 @@
!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));