net/mlx5e: IPsec, Enclose csum logic under ipsec config

All IPsec logic should be wrapped under the compile flag,
including its checksum logic.
Introduce an inline function in ipsec datapath header,
with a corresponding stub.
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Reviewed-by: Huy Nguyen <huyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.h

@@ -87,6 +87,11 @@ static inline bool mlx5e_ipsec_is_tx_flow(struct mlx5e_accel_tx_ipsec_state *ips
 	return ipsec_st->x;
 }
 
+static inline bool mlx5e_ipsec_eseg_meta(struct mlx5_wqe_eth_seg *eseg)
+{
+	return eseg->flow_table_metadata & cpu_to_be32(MLX5_ETH_WQE_FT_META_IPSEC);
+}
+
 void mlx5e_ipsec_tx_build_eseg(struct mlx5e_priv *priv, struct sk_buff *skb,
 			       struct mlx5_wqe_eth_seg *eseg);
 #else
@@ -96,6 +101,11 @@ void mlx5e_ipsec_offload_handle_rx_skb(struct net_device *netdev,
 				       struct mlx5_cqe64 *cqe)
 {}
 
+static inline bool mlx5e_ipsec_eseg_meta(struct mlx5_wqe_eth_seg *eseg)
+{
+	return false;
+}
+
 static inline bool mlx5_ipsec_is_rx_flow(struct mlx5_cqe64 *cqe) { return false; }
 #endif /* CONFIG_MLX5_EN_IPSEC */
 

drivers/net/ethernet/mellanox/mlx5/core/en_tx.c

@@ -241,9 +241,8 @@ mlx5e_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb,
 		eseg->cs_flags = MLX5_ETH_WQE_L3_CSUM | MLX5_ETH_WQE_L4_CSUM;
 		sq->stats->csum_partial++;
 #endif
-	} else if (unlikely(eseg->flow_table_metadata & cpu_to_be32(MLX5_ETH_WQE_FT_META_IPSEC))) {
+	} else if (unlikely(mlx5e_ipsec_eseg_meta(eseg))) {
 		ipsec_txwqe_build_eseg_csum(sq, skb, eseg);
-
 	} else
 		sq->stats->csum_none++;
 }