IB/mlx5: Use enumerations for PI copy mask

In case input and output space parameters match, we can use a copy
mask from input and output space.  Use enums for those.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/mlx5/qp.c

@@ -2095,11 +2095,11 @@ static int mlx5_set_bsf(struct ib_mr *sig_mr,
 			/* Same block structure */
 			basic->bsf_size_sbs = 1 << 4;
 			if (mem->sig.dif.bg_type == wire->sig.dif.bg_type)
-				basic->wire.copy_byte_mask |= 0xc0;
+				basic->wire.copy_byte_mask |= MLX5_CPY_GRD_MASK;
 			if (mem->sig.dif.app_tag == wire->sig.dif.app_tag)
-				basic->wire.copy_byte_mask |= 0x30;
+				basic->wire.copy_byte_mask |= MLX5_CPY_APP_MASK;
 			if (mem->sig.dif.ref_tag == wire->sig.dif.ref_tag)
-				basic->wire.copy_byte_mask |= 0x0f;
+				basic->wire.copy_byte_mask |= MLX5_CPY_REF_MASK;
 		} else
 			basic->wire.bs_selector = bs_selector(wire->sig.dif.pi_interval);
 

include/linux/mlx5/qp.h

@@ -40,6 +40,9 @@
 #define MLX5_SIG_WQE_SIZE	(MLX5_SEND_WQE_BB * 5)
 #define MLX5_DIF_SIZE		8
 #define MLX5_STRIDE_BLOCK_OP	0x400
+#define MLX5_CPY_GRD_MASK	0xc0
+#define MLX5_CPY_APP_MASK	0x30
+#define MLX5_CPY_REF_MASK	0x0f
 
 enum mlx5_qp_optpar {
 	MLX5_QP_OPTPAR_ALT_ADDR_PATH		= 1 << 0,