net/mlx5e: IPsec, Inline feature_check fast-path function

Feature check functions are in the TX fast-path of all SKBs, not only
IPsec traffic.
Move the IPsec feature check function into a header and turn it inline.
Use a stub and clean the config flag condition in Eth main driver file.
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.c

@@ -497,20 +497,6 @@ void mlx5e_ipsec_offload_handle_rx_skb(struct net_device *netdev,
 	}
 }
 
-bool mlx5e_ipsec_feature_check(struct sk_buff *skb, struct net_device *netdev,
-			       netdev_features_t features)
-{
-	struct sec_path *sp = skb_sec_path(skb);
-	struct xfrm_state *x;
-
-	if (sp && sp->len) {
-		x = sp->xvec[0];
-		if (x && x->xso.offload_handle)
-			return true;
-	}
-	return false;
-}
-
 void mlx5e_ipsec_build_inverse_table(void)
 {
 	u16 mss_inv;

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

@@ -57,8 +57,6 @@ struct sk_buff *mlx5e_ipsec_handle_rx_skb(struct net_device *netdev,
 					  struct sk_buff *skb, u32 *cqe_bcnt);
 
 void mlx5e_ipsec_inverse_table_init(void);
-bool mlx5e_ipsec_feature_check(struct sk_buff *skb, struct net_device *netdev,
-			       netdev_features_t features);
 void mlx5e_ipsec_set_iv_esn(struct sk_buff *skb, struct xfrm_state *x,
 			    struct xfrm_offload *xo);
 void mlx5e_ipsec_set_iv(struct sk_buff *skb, struct xfrm_state *x,
@@ -94,6 +92,21 @@ static inline bool mlx5e_ipsec_eseg_meta(struct mlx5_wqe_eth_seg *eseg)
 
 void mlx5e_ipsec_tx_build_eseg(struct mlx5e_priv *priv, struct sk_buff *skb,
 			       struct mlx5_wqe_eth_seg *eseg);
+
+static inline bool mlx5e_ipsec_feature_check(struct sk_buff *skb, struct net_device *netdev,
+					     netdev_features_t features)
+{
+	struct sec_path *sp = skb_sec_path(skb);
+
+	if (sp && sp->len) {
+		struct xfrm_state *x = sp->xvec[0];
+
+		if (x && x->xso.offload_handle)
+			return true;
+	}
+	return false;
+}
+
 #else
 static inline
 void mlx5e_ipsec_offload_handle_rx_skb(struct net_device *netdev,
@@ -107,6 +120,8 @@ static inline bool mlx5e_ipsec_eseg_meta(struct mlx5_wqe_eth_seg *eseg)
 }
 
 static inline bool mlx5_ipsec_is_rx_flow(struct mlx5_cqe64 *cqe) { return false; }
+static inline bool mlx5e_ipsec_feature_check(struct sk_buff *skb, struct net_device *netdev,
+					     netdev_features_t features) { return false; }
 #endif /* CONFIG_MLX5_EN_IPSEC */
 
 #endif /* __MLX5E_IPSEC_RXTX_H__ */

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

@@ -4376,10 +4376,8 @@ netdev_features_t mlx5e_features_check(struct sk_buff *skb,
 	features = vlan_features_check(skb, features);
 	features = vxlan_features_check(skb, features);
 
-#ifdef CONFIG_MLX5_EN_IPSEC
 	if (mlx5e_ipsec_feature_check(skb, netdev, features))
 		return features;
-#endif
 
 	/* Validate if the tunneled packet is being offloaded by HW */
 	if (skb->encapsulation &&