Added support for XRC receive-only QPs (version 2).

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
---
V2:
1. xrc_ops changed to more_ops

diff --git a/src/mlx4.c b/src/mlx4.c
index 27ca75d..e5ded78 100644
--- a/src/mlx4.c
+++ b/src/mlx4.c
@@ -74,6 +74,11 @@ static struct ibv_more_ops mlx4_more_ops = {
 	.create_xrc_srq   = mlx4_create_xrc_srq,
 	.open_xrc_domain  = mlx4_open_xrc_domain,
 	.close_xrc_domain = mlx4_close_xrc_domain,
+	.create_xrc_rcv_qp = mlx4_create_xrc_rcv_qp,
+	.modify_xrc_rcv_qp = mlx4_modify_xrc_rcv_qp,
+	.query_xrc_rcv_qp = mlx4_query_xrc_rcv_qp,
+	.reg_xrc_rcv_qp   = mlx4_reg_xrc_rcv_qp,
+	.unreg_xrc_rcv_qp = mlx4_unreg_xrc_rcv_qp,
 #endif
 };
 #endif
diff --git a/src/mlx4.h b/src/mlx4.h
index 3eadb98..6307a2d 100644
--- a/src/mlx4.h
+++ b/src/mlx4.h
@@ -429,6 +429,21 @@ struct ibv_xrc_domain *mlx4_open_xrc_domain(struct ibv_context *context,
 					    int fd, int oflag);
 
 int mlx4_close_xrc_domain(struct ibv_xrc_domain *d);
+int mlx4_create_xrc_rcv_qp(struct ibv_qp_init_attr *init_attr,
+			   uint32_t *xrc_qp_num);
+int mlx4_modify_xrc_rcv_qp(struct ibv_xrc_domain *xrc_domain,
+			   uint32_t xrc_qp_num,
+			   struct ibv_qp_attr *attr,
+			   int attr_mask);
+int mlx4_query_xrc_rcv_qp(struct ibv_xrc_domain *xrc_domain,
+			  uint32_t xrc_qp_num,
+			  struct ibv_qp_attr *attr,
+			  int attr_mask,
+			  struct ibv_qp_init_attr *init_attr);
+int mlx4_reg_xrc_rcv_qp(struct ibv_xrc_domain *xrc_domain,
+			uint32_t xrc_qp_num);
+int mlx4_unreg_xrc_rcv_qp(struct ibv_xrc_domain *xrc_domain,
+			uint32_t xrc_qp_num);
 #endif
 
 
diff --git a/src/verbs.c b/src/verbs.c
index b7c9c8e..8261eae 100644
--- a/src/verbs.c
+++ b/src/verbs.c
@@ -778,4 +778,59 @@ int mlx4_close_xrc_domain(struct ibv_xrc_domain *d)
 	free(d);
 	return 0;
 }
+
+int mlx4_create_xrc_rcv_qp(struct ibv_qp_init_attr *init_attr,
+			   uint32_t *xrc_qp_num)
+{
+
+	return ibv_cmd_create_xrc_rcv_qp(init_attr, xrc_qp_num);
+}
+
+int mlx4_modify_xrc_rcv_qp(struct ibv_xrc_domain *xrc_domain,
+			   uint32_t xrc_qp_num,
+			   struct ibv_qp_attr *attr,
+			   int attr_mask)
+{
+	return ibv_cmd_modify_xrc_rcv_qp(xrc_domain, xrc_qp_num,
+					 attr, attr_mask);
+}
+
+int mlx4_query_xrc_rcv_qp(struct ibv_xrc_domain *xrc_domain,
+			  uint32_t xrc_qp_num,
+			  struct ibv_qp_attr *attr,
+			  int attr_mask,
+			  struct ibv_qp_init_attr *init_attr)
+{
+	int ret;
+
+	ret = ibv_cmd_query_xrc_rcv_qp(xrc_domain, xrc_qp_num,
+				       attr, attr_mask, init_attr);
+	if (ret)
+		return ret;
+
+	init_attr->cap.max_send_wr = init_attr->cap.max_send_sge = 1;
+	init_attr->cap.max_recv_sge = init_attr->cap.max_recv_wr = 0;
+	init_attr->cap.max_inline_data = 0;
+	init_attr->recv_cq = init_attr->send_cq = NULL;
+	init_attr->srq = NULL;
+	init_attr->xrc_domain = xrc_domain;
+	init_attr->qp_type = IBV_QPT_XRC;
+	init_attr->qp_context = NULL;
+	attr->cap = init_attr->cap;
+
+	return 0;
+}
+
+int mlx4_reg_xrc_rcv_qp(struct ibv_xrc_domain *xrc_domain,
+			uint32_t xrc_qp_num)
+{
+	return ibv_cmd_reg_xrc_rcv_qp(xrc_domain, xrc_qp_num);
+}
+
+int mlx4_unreg_xrc_rcv_qp(struct ibv_xrc_domain *xrc_domain,
+			  uint32_t xrc_qp_num)
+{
+	return ibv_cmd_unreg_xrc_rcv_qp(xrc_domain, xrc_qp_num);
+}
+
 #endif