[PATCH 08/17] RDMA/core: Add signature attrs element for ib_mr structure

[Max Gurtovoy <maxg@xxxxxxxxxxxx>]

This element will describe the needed characteristics for the signature
operation per signature enabled memory region (type IB_MR_TYPE_PI).

Signed-off-by: Max Gurtovoy <maxg@xxxxxxxxxxxx>
Signed-off-by: Israel Rukshin <israelr@xxxxxxxxxxxx>
---
 drivers/infiniband/core/uverbs_cmd.c |  1 +
 drivers/infiniband/core/verbs.c      | 11 +++++++++++
 include/rdma/ib_verbs.h              |  2 +-
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 72c5a8daf558..699fbcf68d06 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -739,6 +739,7 @@ static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 	mr->pd      = pd;
 	mr->type    = IB_MR_TYPE_MEM_REG;
 	mr->dm	    = NULL;
+	mr->sig_attrs = NULL;
 	mr->uobject = uobj;
 	atomic_inc(&pd->usecnt);
 	mr->res.type = RDMA_RESTRACK_MR;
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 358ea4c44400..fb6184a17d04 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1947,6 +1947,7 @@ int ib_dereg_mr(struct ib_mr *mr)
 {
 	struct ib_pd *pd = mr->pd;
 	struct ib_dm *dm = mr->dm;
+	struct ib_sig_attrs *sig_attrs = mr->sig_attrs;
 	int ret;
 
 	rdma_restrack_del(&mr->res);
@@ -1955,6 +1956,7 @@ int ib_dereg_mr(struct ib_mr *mr)
 		atomic_dec(&pd->usecnt);
 		if (dm)
 			atomic_dec(&dm->usecnt);
+		kfree(sig_attrs);
 	}
 
 	return ret;
@@ -1996,6 +1998,7 @@ struct ib_mr *ib_alloc_mr(struct ib_pd *pd,
 		mr->res.type = RDMA_RESTRACK_MR;
 		rdma_restrack_kadd(&mr->res);
 		mr->type = mr_type;
+		mr->sig_attrs = NULL;
 	}
 
 	return mr;
@@ -2019,6 +2022,7 @@ struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
 				    u32 max_num_meta_sg)
 {
 	struct ib_mr *mr;
+	struct ib_sig_attrs *sig_attrs;
 
 	if (!pd->device->ops.alloc_mr_integrity ||
 	    !pd->device->ops.map_mr_sg_pi)
@@ -2027,6 +2031,10 @@ struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
 	if (!max_num_meta_sg)
 		return ERR_PTR(-EINVAL);
 
+	sig_attrs = kzalloc(sizeof(struct ib_sig_attrs), GFP_KERNEL);
+	if (!sig_attrs)
+		return ERR_PTR(-ENOMEM);
+
 	mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg,
 						max_num_meta_sg);
 	if (!IS_ERR(mr)) {
@@ -2039,6 +2047,9 @@ struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
 		mr->res.type = RDMA_RESTRACK_MR;
 		rdma_restrack_kadd(&mr->res);
 		mr->type = IB_MR_TYPE_PI;
+		mr->sig_attrs = sig_attrs;
+	} else {
+		kfree(sig_attrs);
 	}
 
 	return mr;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index a48f16590574..75b470e1120e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1707,7 +1707,7 @@ struct ib_mr {
 	};
 
 	struct ib_dm      *dm;
-
+	struct ib_sig_attrs *sig_attrs; /* only for IB_MR_TYPE_PI MRs */
 	/*
 	 * Implementation details of the RDMA core, don't use in drivers:
 	 */
-- 
2.16.3