IB/mlx5: Add create_cq extended command

In order to create a CQ that supports timestamp, mlx5 needs to
support the extended create CQ command with the timestamp flag.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/cq.c

@@ -757,6 +757,10 @@ static void destroy_cq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_cq *cq)
 	mlx5_db_free(dev->mdev, &cq->db);
 }
 
+enum {
+	CQ_CREATE_FLAGS_SUPPORTED = IB_CQ_FLAGS_TIMESTAMP_COMPLETION
+};
+
 struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
 				const struct ib_cq_init_attr *attr,
 				struct ib_ucontext *context,
@@ -780,6 +784,9 @@ struct ib_cq *mlx5_ib_create_cq(struct ib_device *ibdev,
 	if (entries < 0)
 		return ERR_PTR(-EINVAL);
 
+	if (attr->flags & ~CQ_CREATE_FLAGS_SUPPORTED)
+		return ERR_PTR(-EOPNOTSUPP);
+
 	entries = roundup_pow_of_two(entries + 1);
 	if (entries > (1 << MLX5_CAP_GEN(dev->mdev, log_max_cq_sz)))
 		return ERR_PTR(-EINVAL);