block: move ref_tag calculation func to the block layer

Currently this function is implemented in the scsi layer, but it's
actual place should be the block layer since T10-PI is a general
data integrity feature that is used in the nvme protocol as well.

Suggested-by: Christoph Hellwig <hch@lst.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index ca844a9..130bf16 100644 (file)
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -311,7 +311,7 @@ iser_set_dif_domain(struct scsi_cmnd *sc, struct ib_sig_attrs *sig_attrs,
 {
        domain->sig_type = IB_SIG_TYPE_T10_DIF;
        domain->sig.dif.pi_interval = scsi_prot_interval(sc);
-       domain->sig.dif.ref_tag = scsi_prot_ref_tag(sc);
+       domain->sig.dif.ref_tag = t10_pi_ref_tag(sc->request);
        /*
         * At the moment we hard code those, but in the future
         * we will take them from sc.

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index e77e641..16c8b86 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -611,8 +611,7 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
                case NVME_NS_DPS_PI_TYPE2:
                        control |= NVME_RW_PRINFO_PRCHK_GUARD |
                                        NVME_RW_PRINFO_PRCHK_REF;
-                       cmnd->rw.reftag = cpu_to_le32(
-                                       nvme_block_nr(ns, blk_rq_pos(req)));
+                       cmnd->rw.reftag = cpu_to_le32(t10_pi_ref_tag(req));
                        break;
                }
        }

diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index b8d131a..dd738ae 100644 (file)
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -4568,7 +4568,7 @@ _scsih_setup_eedp(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
                    MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
                    MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;
                mpi_request->CDB.EEDP32.PrimaryReferenceTag =
-                   cpu_to_be32(scsi_prot_ref_tag(scmd));
+                   cpu_to_be32(t10_pi_ref_tag(scmd->request));
                break;
 
        case SCSI_PROT_DIF_TYPE3:

diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index 9035380..d8de43d 100644 (file)
--- a/drivers/scsi/sd_dif.c
+++ b/drivers/scsi/sd_dif.c
@@ -124,7 +124,7 @@ void sd_dif_prepare(struct scsi_cmnd *scmd)
        if (sdkp->protection_type == T10_PI_TYPE3_PROTECTION)
                return;
 
-       phys = scsi_prot_ref_tag(scmd);
+       phys = t10_pi_ref_tag(scmd->request);
 
        __rq_for_each_bio(bio, scmd->request) {
                struct bio_integrity_payload *bip = bio_integrity(bio);
@@ -176,7 +176,7 @@ void sd_dif_complete(struct scsi_cmnd *scmd, unsigned int good_bytes)
                return;
 
        intervals = good_bytes / scsi_prot_interval(scmd);
-       phys = scsi_prot_ref_tag(scmd);
+       phys = t10_pi_ref_tag(scmd->request);
 
        __rq_for_each_bio(bio, scmd->request) {
                struct bio_integrity_payload *bip = bio_integrity(bio);

diff --git a/include/linux/t10-pi.h b/include/linux/t10-pi.h
index c6aa8a3..c40511f 100644 (file)
--- a/include/linux/t10-pi.h
+++ b/include/linux/t10-pi.h
@@ -37,6 +37,16 @@ struct t10_pi_tuple {
 #define T10_PI_APP_ESCAPE cpu_to_be16(0xffff)
 #define T10_PI_REF_ESCAPE cpu_to_be32(0xffffffff)
 
+static inline u32 t10_pi_ref_tag(struct request *rq)
+{
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+       return blk_rq_pos(rq) >>
+               (rq->q->integrity.interval_exp - 9) & 0xffffffff;
+#else
+       return -1U;
+#endif
+}
+
 extern const struct blk_integrity_profile t10_pi_type1_crc;
 extern const struct blk_integrity_profile t10_pi_type1_ip;
 extern const struct blk_integrity_profile t10_pi_type3_crc;

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index aaf1e97..cae229b 100644 (file)
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -4,6 +4,7 @@
 
 #include <linux/dma-mapping.h>
 #include <linux/blkdev.h>
+#include <linux/t10-pi.h>
 #include <linux/list.h>
 #include <linux/types.h>
 #include <linux/timer.h>
@@ -313,12 +314,6 @@ static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
        return scmd->device->sector_size;
 }
 
-static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
-{
-       return blk_rq_pos(scmd->request) >>
-               (ilog2(scsi_prot_interval(scmd)) - 9) & 0xffffffff;
-}
-
 static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd)
 {
        return cmd->prot_sdb ? cmd->prot_sdb->table.nents : 0;