net/mlx5: Kconfig: Make tc offload depend on tc skb extension

Tc skb extension is a basic requirement for using tc
offload to support correct restoration on action miss.

Depend on it.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Paul Blakey

drivers/net/ethernet/mellanox/mlx5/core/Kconfig

@@ -85,7 +85,7 @@ config MLX5_BRIDGE
 
 config MLX5_CLS_ACT
 	bool "MLX5 TC classifier action support"
-	depends on MLX5_ESWITCH && NET_CLS_ACT
+	depends on MLX5_ESWITCH && NET_CLS_ACT && NET_TC_SKB_EXT
 	default y
 	help
 	  mlx5 ConnectX offloads support for TC classifier action (NET_CLS_ACT),
@@ -100,7 +100,7 @@ config MLX5_CLS_ACT
 
 config MLX5_TC_CT
 	bool "MLX5 TC connection tracking offload support"
-	depends on MLX5_CLS_ACT && NF_FLOW_TABLE && NET_ACT_CT && NET_TC_SKB_EXT
+	depends on MLX5_CLS_ACT && NF_FLOW_TABLE && NET_ACT_CT
 	default y
 	help
 	  Say Y here if you want to support offloading connection tracking rules

drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c

@@ -762,7 +762,6 @@ static bool mlx5e_restore_skb_chain(struct sk_buff *skb, u32 chain, u32 reg_c1,
 	struct mlx5e_priv *priv = netdev_priv(skb->dev);
 	u32 tunnel_id = (reg_c1 >> ESW_TUN_OFFSET) & TUNNEL_ID_MASK;
 
-#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
 	if (chain) {
 		struct mlx5_rep_uplink_priv *uplink_priv;
 		struct mlx5e_rep_priv *uplink_rpriv;
@@ -784,7 +783,6 @@ static bool mlx5e_restore_skb_chain(struct sk_buff *skb, u32 chain, u32 reg_c1,
 					      zone_restore_id))
 			return false;
 	}
-#endif /* CONFIG_NET_TC_SKB_EXT */
 
 	return mlx5e_restore_tunnel(priv, skb, tc_priv, tunnel_id);
 }

drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c

@@ -2078,13 +2078,6 @@ mlx5_tc_ct_init_check_support(struct mlx5e_priv *priv,
 	const char *err_msg = NULL;
 	int err = 0;
 
-#if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
-	/* cannot restore chain ID on HW miss */
-
-	err_msg = "tc skb extension missing";
-	err = -EOPNOTSUPP;
-	goto out_err;
-#endif
 	if (IS_ERR_OR_NULL(post_act)) {
 		/* Ignore_flow_level support isn't supported by default for VFs and so post_act
 		 * won't be supported. Skip showing error msg.

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

@@ -5607,7 +5607,6 @@ int mlx5e_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
 bool mlx5e_tc_update_skb(struct mlx5_cqe64 *cqe,
 			 struct sk_buff *skb)
 {
-#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
 	u32 chain = 0, chain_tag, reg_b, zone_restore_id;
 	struct mlx5e_priv *priv = netdev_priv(skb->dev);
 	struct mlx5_mapped_obj mapped_obj;
@@ -5645,7 +5644,6 @@ bool mlx5e_tc_update_skb(struct mlx5_cqe64 *cqe,
 		netdev_dbg(priv->netdev, "Invalid mapped object type: %d\n", mapped_obj.type);
 		return false;
 	}
-#endif /* CONFIG_NET_TC_SKB_EXT */
 
 	return true;
 }

drivers/net/ethernet/mellanox/mlx5/core/en_tc.h

@@ -368,7 +368,6 @@ struct mlx5e_tc_table *mlx5e_tc_table_alloc(void);
 void mlx5e_tc_table_free(struct mlx5e_tc_table *tc);
 static inline bool mlx5e_cqe_regb_chain(struct mlx5_cqe64 *cqe)
 {
-#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
 	u32 chain, reg_b;
 
 	reg_b = be32_to_cpu(cqe->ft_metadata);
@@ -379,7 +378,6 @@ static inline bool mlx5e_cqe_regb_chain(struct mlx5_cqe64 *cqe)
 	chain = reg_b & MLX5E_TC_TABLE_CHAIN_TAG_MASK;
 	if (chain)
 		return true;
-#endif
 
 	return false;
 }