Implement the new provider method for registering dma-buf based memory
regions.

Signed-off-by: Jianxin Xiong <jianxin.xi...@intel.com>
---
 providers/mlx5/mlx5.c  |  2 ++
 providers/mlx5/mlx5.h  |  3 +++
 providers/mlx5/verbs.c | 22 ++++++++++++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/providers/mlx5/mlx5.c b/providers/mlx5/mlx5.c
index a2a1696..b3c49af 100644
--- a/providers/mlx5/mlx5.c
+++ b/providers/mlx5/mlx5.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2012 Mellanox Technologies, Inc.  All rights reserved.
+ * Copyright (c) 2020 Intel Corporation.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
@@ -95,6 +96,7 @@ static const struct verbs_context_ops mlx5_ctx_common_ops = {
        .async_event   = mlx5_async_event,
        .dealloc_pd    = mlx5_free_pd,
        .reg_mr        = mlx5_reg_mr,
+       .reg_dmabuf_mr = mlx5_reg_dmabuf_mr,
        .rereg_mr      = mlx5_rereg_mr,
        .dereg_mr      = mlx5_dereg_mr,
        .alloc_mw      = mlx5_alloc_mw,
diff --git a/providers/mlx5/mlx5.h b/providers/mlx5/mlx5.h
index bafe077..decc7f8 100644
--- a/providers/mlx5/mlx5.h
+++ b/providers/mlx5/mlx5.h
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2012 Mellanox Technologies, Inc.  All rights reserved.
+ * Copyright (c) 2020 Intel Corporation.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
@@ -941,6 +942,8 @@ void mlx5_async_event(struct ibv_context *context,
 struct ibv_mr *mlx5_alloc_null_mr(struct ibv_pd *pd);
 struct ibv_mr *mlx5_reg_mr(struct ibv_pd *pd, void *addr, size_t length,
                           uint64_t hca_va, int access);
+struct ibv_mr *mlx5_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset, size_t 
length,
+                                 uint64_t iova, int fd, int access);
 int mlx5_rereg_mr(struct verbs_mr *mr, int flags, struct ibv_pd *pd, void 
*addr,
                  size_t length, int access);
 int mlx5_dereg_mr(struct verbs_mr *mr);
diff --git a/providers/mlx5/verbs.c b/providers/mlx5/verbs.c
index 30c7b6e..7790b50 100644
--- a/providers/mlx5/verbs.c
+++ b/providers/mlx5/verbs.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2012 Mellanox Technologies, Inc.  All rights reserved.
+ * Copyright (c) 2020 Intel Corporation.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
@@ -628,6 +629,27 @@ struct ibv_mr *mlx5_reg_mr(struct ibv_pd *pd, void *addr, 
size_t length,
        return &mr->vmr.ibv_mr;
 }
 
+struct ibv_mr *mlx5_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset, size_t 
length,
+                                 uint64_t iova, int fd, int acc)
+{
+       struct mlx5_mr *mr;
+       int ret;
+
+       mr = calloc(1, sizeof(*mr));
+       if (!mr)
+               return NULL;
+
+       ret = ibv_cmd_reg_dmabuf_mr(pd, offset, length, iova, fd, acc,
+                                   &mr->vmr);
+       if (ret) {
+               free(mr);
+               return NULL;
+       }
+       mr->alloc_flags = acc;
+
+       return &mr->vmr.ibv_mr;
+}
+
 struct ibv_mr *mlx5_alloc_null_mr(struct ibv_pd *pd)
 {
        struct mlx5_mr *mr;
-- 
1.8.3.1

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