Providers/rxe: Add dma-buf support

Implement a new provider method for dma-buf base memory registration.

Signed-off-by: Shunsuke Mie <[email protected]>

providers/rxe/rxe.c

@@ -239,6 +239,26 @@ static struct ibv_mr *rxe_reg_mr(struct ibv_pd *pd, void *addr, size_t length,
  return &vmr->ibv_mr;
 }
 
+static struct ibv_mr *rxe_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset,
+ size_t length, uint64_t iova, int fd,
+ int access)
+{
+ struct verbs_mr *vmr;
+ int ret;
+
+ vmr = malloc(sizeof(*vmr));
+ if (!vmr)
+ return NULL;
+
+ ret = ibv_cmd_reg_dmabuf_mr(pd, offset, length, iova, fd, access, vmr);
+ if (ret) {
+ free(vmr);
+ return NULL;
+ }
+
+ return &vmr->ibv_mr;
+}
+
 static int rxe_dereg_mr(struct verbs_mr *vmr)
 {
  int ret;
@@ -1706,6 +1726,7 @@ static const struct verbs_context_ops rxe_ctx_ops = {
  .alloc_pd = rxe_alloc_pd,
  .dealloc_pd = rxe_dealloc_pd,
  .reg_mr = rxe_reg_mr,
+ .reg_dmabuf_mr = rxe_reg_dmabuf_mr,
  .dereg_mr = rxe_dereg_mr,
  .alloc_mw = rxe_alloc_mw,
  .dealloc_mw = rxe_dealloc_mw,