mlxsw: spectrum_acl: Provide helper to lookup ruleset

We need to lookup ruleset in order to offload goto_chain termination
action. This patch adds it.

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

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -441,6 +441,10 @@ struct mlxsw_sp_acl_ruleset;
 /* spectrum_acl.c */
 struct mlxsw_afk *mlxsw_sp_acl_afk(struct mlxsw_sp_acl *acl);
 struct mlxsw_sp_acl_ruleset *
+mlxsw_sp_acl_ruleset_lookup(struct mlxsw_sp *mlxsw_sp, struct net_device *dev,
+			    bool ingress, u32 chain_index,
+			    enum mlxsw_sp_acl_profile profile);
+struct mlxsw_sp_acl_ruleset *
 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);

drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c

@@ -221,6 +221,41 @@ static void mlxsw_sp_acl_ruleset_ref_dec(struct mlxsw_sp *mlxsw_sp,
 	mlxsw_sp_acl_ruleset_destroy(mlxsw_sp, ruleset);
 }
 
+static struct mlxsw_sp_acl_ruleset *
+__mlxsw_sp_acl_ruleset_lookup(struct mlxsw_sp_acl *acl, struct net_device *dev,
+			      bool ingress, u32 chain_index,
+			      const struct mlxsw_sp_acl_profile_ops *ops)
+{
+	struct mlxsw_sp_acl_ruleset_ht_key ht_key;
+
+	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;
+	return rhashtable_lookup_fast(&acl->ruleset_ht, &ht_key,
+				      mlxsw_sp_acl_ruleset_ht_params);
+}
+
+struct mlxsw_sp_acl_ruleset *
+mlxsw_sp_acl_ruleset_lookup(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;
+	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;
+	struct mlxsw_sp_acl_ruleset *ruleset;
+
+	ops = acl->ops->profile_ops(mlxsw_sp, profile);
+	if (!ops)
+		return ERR_PTR(-EINVAL);
+	ruleset = __mlxsw_sp_acl_ruleset_lookup(acl, dev, ingress,
+						chain_index, ops);
+	if (!ruleset)
+		return ERR_PTR(-ENOENT);
+	return ruleset;
+}
+
 struct mlxsw_sp_acl_ruleset *
 mlxsw_sp_acl_ruleset_get(struct mlxsw_sp *mlxsw_sp, struct net_device *dev,
 			 bool ingress, u32 chain_index,
@@ -228,7 +263,6 @@ mlxsw_sp_acl_ruleset_get(struct mlxsw_sp *mlxsw_sp, struct net_device *dev,
 {
 	const struct mlxsw_sp_acl_profile_ops *ops;
 	struct mlxsw_sp_acl *acl = mlxsw_sp->acl;
-	struct mlxsw_sp_acl_ruleset_ht_key ht_key;
 	struct mlxsw_sp_acl_ruleset *ruleset;
 	int err;
 
@@ -236,13 +270,8 @@ mlxsw_sp_acl_ruleset_get(struct mlxsw_sp *mlxsw_sp, struct net_device *dev,
 	if (!ops)
 		return ERR_PTR(-EINVAL);
 
-	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);
+	ruleset = __mlxsw_sp_acl_ruleset_lookup(acl, dev, ingress,
+						chain_index, ops);
 	if (ruleset) {
 		mlxsw_sp_acl_ruleset_ref_inc(ruleset);
 		return ruleset;