mlxsw: spectrum: Offload multichain TC rules

Reflect chain index coming down from TC core and create a ruleset per
chain. Note that only chain 0, being the implicit chain, is bound to the
device for processing. The rest of chains have to be "jumped-to" by
actions.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 20 insertions, 8 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
index 508b5fcacd77..8ab331bdff02 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
@@ -74,6 +74,7 @@ struct mlxsw_afk *mlxsw_sp_acl_afk(struct mlxsw_sp_acl *acl)
 struct mlxsw_sp_acl_ruleset_ht_key {
 	struct net_device *dev; /* dev this ruleset is bound to */
 	bool ingress;
+	u32 chain_index;
 	const struct mlxsw_sp_acl_profile_ops *ops;
 };
 
@@ -163,7 +164,8 @@ static void mlxsw_sp_acl_ruleset_destroy(struct mlxsw_sp *mlxsw_sp,
 
 static int mlxsw_sp_acl_ruleset_bind(struct mlxsw_sp *mlxsw_sp,
 				     struct mlxsw_sp_acl_ruleset *ruleset,
-				     struct net_device *dev, bool ingress)
+				     struct net_device *dev, bool ingress,
+				     u32 chain_index)
 {
 	const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops;
 	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;
@@ -171,13 +173,20 @@ static int mlxsw_sp_acl_ruleset_bind(struct mlxsw_sp *mlxsw_sp,
 
 	ruleset->ht_key.dev = dev;
 	ruleset->ht_key.ingress = ingress;
+	ruleset->ht_key.chain_index = chain_index;
 	err = rhashtable_insert_fast(&acl->ruleset_ht, &ruleset->ht_node,
 				     mlxsw_sp_acl_ruleset_ht_params);
 	if (err)
 		return err;
-	err = ops->ruleset_bind(mlxsw_sp, ruleset->priv, dev, ingress);
-	if (err)
-		goto err_ops_ruleset_bind;
+	if (!ruleset->ht_key.chain_index) {
+		/* We only need ruleset with chain index 0, the implicit one,
+		 * to be directly bound to device. The rest of the rulesets
+		 * are bound by "Goto action set".
+		 */
+		err = ops->ruleset_bind(mlxsw_sp, ruleset->priv, dev, ingress);
+		if (err)
+			goto err_ops_ruleset_bind;
+	}
 	return 0;
 
 err_ops_ruleset_bind:
@@ -192,7 +201,8 @@ static void mlxsw_sp_acl_ruleset_unbind(struct mlxsw_sp *mlxsw_sp,
 	const struct mlxsw_sp_acl_profile_ops *ops = ruleset->ht_key.ops;
 	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;
 
-	ops->ruleset_unbind(mlxsw_sp, ruleset->priv);
+	if (!ruleset->ht_key.chain_index)
+		ops->ruleset_unbind(mlxsw_sp, ruleset->priv);
 	rhashtable_remove_fast(&acl->ruleset_ht, &ruleset->ht_node,
 			       mlxsw_sp_acl_ruleset_ht_params);
 }
@@ -212,8 +222,8 @@ static void mlxsw_sp_acl_ruleset_ref_dec(struct mlxsw_sp *mlxsw_sp,
 }
 
 struct mlxsw_sp_acl_ruleset *
-mlxsw_sp_acl_ruleset_get(struct mlxsw_sp *mlxsw_sp,
-			 struct net_device *dev, bool ingress,
+mlxsw_sp_acl_ruleset_get(struct mlxsw_sp *mlxsw_sp, struct net_device *dev,
+			 bool ingress, u32 chain_index,
 			 enum mlxsw_sp_acl_profile profile)
 {
 	const struct mlxsw_sp_acl_profile_ops *ops;
@@ -229,6 +239,7 @@ mlxsw_sp_acl_ruleset_get(struct mlxsw_sp *mlxsw_sp,
 	memset(&ht_key, 0, sizeof(ht_key));
 	ht_key.dev = dev;
 	ht_key.ingress = ingress;
+	ht_key.chain_index = chain_index;
 	ht_key.ops = ops;
 	ruleset = rhashtable_lookup_fast(&acl->ruleset_ht, &ht_key,
 					 mlxsw_sp_acl_ruleset_ht_params);
@@ -239,7 +250,8 @@ mlxsw_sp_acl_ruleset_get(struct mlxsw_sp *mlxsw_sp,
 	ruleset = mlxsw_sp_acl_ruleset_create(mlxsw_sp, ops);
 	if (IS_ERR(ruleset))
 		return ruleset;
-	err = mlxsw_sp_acl_ruleset_bind(mlxsw_sp, ruleset, dev, ingress);
+	err = mlxsw_sp_acl_ruleset_bind(mlxsw_sp, ruleset, dev,
+					ingress, chain_index);
 	if (err)
 		goto err_ruleset_bind;
 	return ruleset;