[rdma-core v3 2/9] libbnxt_re: Add support for user memory regions

Devesh Sharma
2017-03-15T10:37:26Z

This patch adds code to allow user applications to register and
unregister memory buffers with the HCA. Following functions are
now supported:
- ibv_reg_mr()
- ibv_dereg_mr()

Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Signed-off-by: Somnath Kotur <somnath.kotur-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Signed-off-by: Selvin Xavier <selvin.xavier-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Signed-off-by: Devesh Sharma <devesh.sharma-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
---
providers/bnxt_re/bnxt_re-abi.h | 4 ++++
providers/bnxt_re/verbs.c | 26 ++++++++++++++++++++++++--
2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/providers/bnxt_re/bnxt_re-abi.h b/providers/bnxt_re/bnxt_re-abi.h
index 05a0888..53645d5 100644
--- a/providers/bnxt_re/bnxt_re-abi.h
+++ b/providers/bnxt_re/bnxt_re-abi.h
@@ -56,4 +56,8 @@ struct bnxt_re_pd_resp {
__u64 dbr;
};

+struct bnxt_re_mr_resp {
+ struct ibv_reg_mr_resp resp;
+};
+
#endif
diff --git a/providers/bnxt_re/verbs.c b/providers/bnxt_re/verbs.c
index 5b3e1cc..89f2be5 100644
--- a/providers/bnxt_re/verbs.c
+++ b/providers/bnxt_re/verbs.c
@@ -129,12 +129,34 @@ int bnxt_re_free_pd(struct ibv_pd *ibvpd)
struct ibv_mr *bnxt_re_reg_mr(struct ibv_pd *ibvpd, void *sva, size_t len,
int access)
{
- return NULL;
+ struct bnxt_re_mr *mr;
+ struct ibv_reg_mr cmd;
+ struct bnxt_re_mr_resp resp;
+
+ mr = calloc(1, sizeof(*mr));
+ if (!mr)
+ return NULL;
+
+ if (ibv_cmd_reg_mr(ibvpd, sva, len, (uintptr_t)sva, access, &mr->ibvmr,
+ &cmd, sizeof(cmd), &resp.resp, sizeof(resp))) {
+ free(mr);
+ return NULL;
+ }
+
+ return &mr->ibvmr;
}

int bnxt_re_dereg_mr(struct ibv_mr *ibvmr)
{
- return -ENOSYS;
+ struct bnxt_re_mr *mr = (struct bnxt_re_mr *)ibvmr;
+ int status;
+
+ status = ibv_cmd_dereg_mr(ibvmr);
+ if (status)
+ return status;
+ free(mr);
+
+ return 0;
}

struct ibv_cq *bnxt_re_create_cq(struct ibv_context *ibvctx, int ncqe,
--
1.8.3.1