IB/mlx4: Make sure inline data segments don't cross a 64 byte boundary

Inline data segments in send WQEs are not allowed to cross a 64 byte
boundary.  We use inline data segments to hold the UD headers for MLX
QPs (QP0 and QP1).  A send with GRH on QP1 will have a UD header that
is too big to fit in a single inline data segment without crossing a
64 byte boundary, so split the header into two inline data segments.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

include/linux/mlx4/qp.h

@@ -269,6 +269,10 @@ struct mlx4_wqe_data_seg {
 	__be64			addr;
 };
 
+enum {
+	MLX4_INLINE_ALIGN	= 64,
+};
+
 struct mlx4_wqe_inline_seg {
 	__be32			byte_count;
 };