Providers/rxe: Add dma-buf support

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

Signed-off-by: Shunsuke Mie <mie@igel.co.jp>

Author: ShunsukeMie

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,