net/mlx5e: Create new flow attr for multi table actions

Some TC actions use post actions for their implementation.
For example CT and sample actions.

Create a new flow attr after each multi table action and
create a post action rule for it.

First flow attr being offloaded normally and linked to the next
attr (post action rule) with setting an id on reg_c.
Post action rules match the id on reg_c and continue to the next one.

The flow counter is allocated on the last rule.
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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

@@ -2,6 +2,7 @@
 // Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
 #include "act.h"
+#include "en/tc/post_act.h"
 #include "en/tc_priv.h"
 #include "mlx5_core.h"
 
@@ -101,3 +102,75 @@ mlx5e_tc_act_init_parse_state(struct mlx5e_tc_act_parse_state *parse_state,
 	parse_state->num_actions = flow_action->num_entries;
 	parse_state->extack = extack;
 }
+
+void
+mlx5e_tc_act_reorder_flow_actions(struct flow_action *flow_action,
+				  struct mlx5e_tc_flow_action *flow_action_reorder)
+{
+	struct flow_action_entry *act;
+	int i, j = 0;
+
+	flow_action_for_each(i, act, flow_action) {
+		/* Add CT action to be first. */
+		if (act->id == FLOW_ACTION_CT)
+			flow_action_reorder->entries[j++] = act;
+	}
+
+	flow_action_for_each(i, act, flow_action) {
+		if (act->id == FLOW_ACTION_CT)
+			continue;
+		flow_action_reorder->entries[j++] = act;
+	}
+}
+
+int
+mlx5e_tc_act_post_parse(struct mlx5e_tc_act_parse_state *parse_state,
+			struct flow_action *flow_action,
+			struct mlx5_flow_attr *attr,
+			enum mlx5_flow_namespace_type ns_type)
+{
+	struct flow_action_entry *act;
+	struct mlx5e_tc_act *tc_act;
+	struct mlx5e_priv *priv;
+	int err = 0, i;
+
+	priv = parse_state->flow->priv;
+
+	flow_action_for_each(i, act, flow_action) {
+		tc_act = mlx5e_tc_act_get(act->id, ns_type);
+		if (!tc_act || !tc_act->post_parse ||
+		    !tc_act->can_offload(parse_state, act, i, attr))
+			continue;
+
+		err = tc_act->post_parse(parse_state, priv, attr);
+		if (err)
+			goto out;
+	}
+
+out:
+	return err;
+}
+
+int
+mlx5e_tc_act_set_next_post_act(struct mlx5e_tc_flow *flow,
+			       struct mlx5_flow_attr *attr,
+			       struct mlx5_flow_attr *next_attr)
+{
+	struct mlx5_core_dev *mdev = flow->priv->mdev;
+	struct mlx5e_tc_mod_hdr_acts *mod_acts;
+	int err;
+
+	mod_acts = &attr->parse_attr->mod_hdr_acts;
+
+	/* Set handle on current post act rule to next post act rule. */
+	err = mlx5e_tc_post_act_set_handle(mdev, next_attr->post_act_handle, mod_acts);
+	if (err) {
+		mlx5_core_warn(mdev, "Failed setting post action handle");
+		return err;
+	}
+
+	attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
+			MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
+
+	return 0;
+}

drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/act.h

@@ -42,6 +42,15 @@ struct mlx5e_tc_act {
 	int (*post_parse)(struct mlx5e_tc_act_parse_state *parse_state,
 			  struct mlx5e_priv *priv,
 			  struct mlx5_flow_attr *attr);
+
+	bool (*is_multi_table_act)(struct mlx5e_priv *priv,
+				   const struct flow_action_entry *act,
+				   struct mlx5_flow_attr *attr);
+};
+
+struct mlx5e_tc_flow_action {
+	unsigned int num_entries;
+	struct flow_action_entry **entries;
 };
 
 extern struct mlx5e_tc_act mlx5e_tc_act_drop;
@@ -74,4 +83,19 @@ mlx5e_tc_act_init_parse_state(struct mlx5e_tc_act_parse_state *parse_state,
 			      struct flow_action *flow_action,
 			      struct netlink_ext_ack *extack);
 
+void
+mlx5e_tc_act_reorder_flow_actions(struct flow_action *flow_action,
+				  struct mlx5e_tc_flow_action *flow_action_reorder);
+
+int
+mlx5e_tc_act_post_parse(struct mlx5e_tc_act_parse_state *parse_state,
+			struct flow_action *flow_action,
+			struct mlx5_flow_attr *attr,
+			enum mlx5_flow_namespace_type ns_type);
+
+int
+mlx5e_tc_act_set_next_post_act(struct mlx5e_tc_flow *flow,
+			       struct mlx5_flow_attr *attr,
+			       struct mlx5_flow_attr *next_attr);
+
 #endif /* __MLX5_EN_TC_ACT_H__ */

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

@@ -140,15 +140,9 @@ mlx5e_tc_post_act_add(struct mlx5e_post_act *post_act, struct mlx5_flow_attr *at
 		goto err_xarray;
 
 	handle->attr = post_attr;
-	err = mlx5e_tc_post_act_offload(post_act, handle);
-	if (err)
-		goto err_rule;
-
 
 	return handle;
 
-err_rule:
-	xa_erase(&post_act->ids, handle->id);
 err_xarray:
 	kfree(post_attr);
 	kfree(handle);

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

@@ -533,6 +533,9 @@ mlx5e_tc_sample_offload(struct mlx5e_tc_psample *tc_psample,
 			err = PTR_ERR(post_act_handle);
 			goto err_post_act;
 		}
+		err = mlx5e_tc_post_act_offload(tc_psample->post_act, post_act_handle);
+		if (err)
+			goto err_post_rule;
 		sample_flow->post_act_handle = post_act_handle;
 	} else {
 		err = add_post_rule(esw, sample_flow, spec, attr, &default_tbl_id);

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

@@ -1823,6 +1823,9 @@ __mlx5_tc_ct_flow_offload(struct mlx5_tc_ct_priv *ct_priv,
 		ct_dbg("Failed to allocate post action handle");
 		goto err_post_act_handle;
 	}
+	err = mlx5e_tc_post_act_offload(ct_priv->post_act, handle);
+	if (err)
+		goto err_alloc_pre;
 	ct_flow->post_act_handle = handle;
 
 	/* Base flow attributes of both rules on original rule attribute */

drivers/net/ethernet/mellanox/mlx5/core/en/tc_priv.h

@@ -109,6 +109,7 @@ struct mlx5e_tc_flow {
 	struct completion init_done;
 	struct completion del_hw_done;
 	struct mlx5_flow_attr *attr;
+	struct list_head attrs;
 };
 
 struct mlx5_flow_handle *
@@ -129,6 +130,12 @@ mlx5e_tc_offload_fdb_rules(struct mlx5_eswitch *esw,
 			   struct mlx5_flow_spec *spec,
 			   struct mlx5_flow_attr *attr);
 
+struct mlx5_flow_attr *
+mlx5e_tc_get_encap_attr(struct mlx5e_tc_flow *flow);
+
+void mlx5e_tc_unoffload_flow_post_acts(struct mlx5e_tc_flow *flow);
+int mlx5e_tc_offload_flow_post_acts(struct mlx5e_tc_flow *flow);
+
 bool mlx5e_is_eswitch_flow(struct mlx5e_tc_flow *flow);
 bool mlx5e_is_ft_flow(struct mlx5e_tc_flow *flow);
 bool mlx5e_is_offloaded_flow(struct mlx5e_tc_flow *flow);

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

@@ -173,19 +173,29 @@ void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv,
 	list_for_each_entry(flow, flow_list, tmp_list) {
 		if (!mlx5e_is_offloaded_flow(flow) || !flow_flag_test(flow, SLOW))
 			continue;
-		attr = flow->attr;
-		esw_attr = attr->esw_attr;
-		spec = &attr->parse_attr->spec;
 
+		spec = &flow->attr->parse_attr->spec;
+
+		attr = mlx5e_tc_get_encap_attr(flow);
+		esw_attr = attr->esw_attr;
 		esw_attr->dests[flow->tmp_entry_index].pkt_reformat = e->pkt_reformat;
 		esw_attr->dests[flow->tmp_entry_index].flags |= MLX5_ESW_DEST_ENCAP_VALID;
 
 		/* Do not offload flows with unresolved neighbors */
 		if (!mlx5e_tc_flow_all_encaps_valid(esw_attr))
 			continue;
+
+		err = mlx5e_tc_offload_flow_post_acts(flow);
+		if (err) {
+			mlx5_core_warn(priv->mdev, "Failed to update flow post acts, %d\n",
+				       err);
+			continue;
+		}
+
 		/* update from slow path rule to encap rule */
-		rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, attr);
+		rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, flow->attr);
 		if (IS_ERR(rule)) {
+			mlx5e_tc_unoffload_flow_post_acts(flow);
 			err = PTR_ERR(rule);
 			mlx5_core_warn(priv->mdev, "Failed to update cached encapsulation flow, %d\n",
 				       err);
@@ -214,12 +224,13 @@ void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
 	list_for_each_entry(flow, flow_list, tmp_list) {
 		if (!mlx5e_is_offloaded_flow(flow) || flow_flag_test(flow, SLOW))
 			continue;
-		attr = flow->attr;
-		esw_attr = attr->esw_attr;
-		spec = &attr->parse_attr->spec;
+		spec = &flow->attr->parse_attr->spec;
 
 		/* update from encap rule to slow path rule */
 		rule = mlx5e_tc_offload_to_slow_path(esw, flow, spec);
+
+		attr = mlx5e_tc_get_encap_attr(flow);
+		esw_attr = attr->esw_attr;
 		/* mark the flow's encap dest as non-valid */
 		esw_attr->dests[flow->tmp_entry_index].flags &= ~MLX5_ESW_DEST_ENCAP_VALID;
 
@@ -230,7 +241,8 @@ void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
 			continue;
 		}
 
-		mlx5e_tc_unoffload_fdb_rules(esw, flow, attr);
+		mlx5e_tc_unoffload_fdb_rules(esw, flow, flow->attr);
+		mlx5e_tc_unoffload_flow_post_acts(flow);
 		flow->rule[0] = rule;
 		/* was unset when fast path rule removed */
 		flow_flag_set(flow, OFFLOADED);
@@ -495,6 +507,9 @@ void mlx5e_detach_encap(struct mlx5e_priv *priv,
 	struct mlx5e_encap_entry *e = flow->encaps[out_index].e;
 	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
 
+	if (!mlx5e_is_eswitch_flow(flow))
+		return;
+
 	if (attr->esw_attr->dests[out_index].flags &
 	    MLX5_ESW_DEST_CHAIN_WITH_SRC_PORT_CHANGE)
 		mlx5e_detach_encap_route(priv, flow, out_index);
@@ -1360,17 +1375,19 @@ static void mlx5e_reoffload_encap(struct mlx5e_priv *priv,
 
 	list_for_each_entry(flow, encap_flows, tmp_list) {
 		struct mlx5e_tc_flow_parse_attr *parse_attr;
-		struct mlx5_flow_attr *attr = flow->attr;
 		struct mlx5_esw_flow_attr *esw_attr;
 		struct mlx5_flow_handle *rule;
+		struct mlx5_flow_attr *attr;
 		struct mlx5_flow_spec *spec;
 
 		if (flow_flag_test(flow, FAILED))
 			continue;
 
+		spec = &flow->attr->parse_attr->spec;
+
+		attr = mlx5e_tc_get_encap_attr(flow);
 		esw_attr = attr->esw_attr;
 		parse_attr = attr->parse_attr;
-		spec = &parse_attr->spec;
 
 		err = mlx5e_update_vf_tunnel(esw, esw_attr, &parse_attr->mod_hdr_acts,
 					     e->out_dev, e->route_dev_ifindex,
@@ -1392,9 +1409,18 @@ static void mlx5e_reoffload_encap(struct mlx5e_priv *priv,
 			esw_attr->dests[flow->tmp_entry_index].flags |= MLX5_ESW_DEST_ENCAP_VALID;
 			if (!mlx5e_tc_flow_all_encaps_valid(esw_attr))
 				goto offload_to_slow_path;
+
+			err = mlx5e_tc_offload_flow_post_acts(flow);
+			if (err) {
+				mlx5_core_warn(priv->mdev, "Failed to update flow post acts, %d\n",
+					       err);
+				goto offload_to_slow_path;
+			}
+
 			/* update from slow path rule to encap rule */
-			rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, attr);
+			rule = mlx5e_tc_offload_fdb_rules(esw, flow, spec, flow->attr);
 			if (IS_ERR(rule)) {
+				mlx5e_tc_unoffload_flow_post_acts(flow);
 				err = PTR_ERR(rule);
 				mlx5_core_warn(priv->mdev, "Failed to update cached encapsulation flow, %d\n",
 					       err);

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

@@ -115,6 +115,7 @@ struct mlx5e_tc_attr_to_reg_mapping mlx5e_tc_attr_to_reg_mappings[] = {
 static struct lock_class_key tc_ht_lock_key;
 
 static void mlx5e_put_flow_tunnel_id(struct mlx5e_tc_flow *flow);
+static void free_flow_post_acts(struct mlx5e_tc_flow *flow);
 
 void
 mlx5e_tc_match_to_reg_match(struct mlx5_flow_spec *spec,
@@ -273,6 +274,23 @@ get_sample_priv(struct mlx5e_priv *priv)
 	return NULL;
 }
 
+static struct mlx5e_post_act *
+get_post_action(struct mlx5e_priv *priv)
+{
+	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
+	struct mlx5_rep_uplink_priv *uplink_priv;
+	struct mlx5e_rep_priv *uplink_rpriv;
+
+	if (is_mdev_switchdev_mode(priv->mdev)) {
+		uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
+		uplink_priv = &uplink_rpriv->uplink_priv;
+
+		return uplink_priv->post_act;
+	}
+
+	return priv->fs.tc.post_act;
+}
+
 struct mlx5_flow_handle *
 mlx5_tc_rule_insert(struct mlx5e_priv *priv,
 		    struct mlx5_flow_spec *spec,
@@ -1193,6 +1211,8 @@ static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
 	if (flow_flag_test(flow, HAIRPIN))
 		mlx5e_hairpin_flow_del(priv, flow);
 
+	free_flow_post_acts(flow);
+
 	kvfree(attr->parse_attr);
 	kfree(flow->attr);
 }
@@ -1425,6 +1445,9 @@ set_encap_dests(struct mlx5e_priv *priv,
 	int out_index;
 	int err = 0;
 
+	if (!mlx5e_is_eswitch_flow(flow))
+		return 0;
+
 	parse_attr = attr->parse_attr;
 	esw_attr = attr->esw_attr;
 	*vf_tun = false;
@@ -1480,6 +1503,9 @@ clean_encap_dests(struct mlx5e_priv *priv,
 	struct mlx5_esw_flow_attr *esw_attr;
 	int out_index;
 
+	if (!mlx5e_is_eswitch_flow(flow))
+		return;
+
 	esw_attr = attr->esw_attr;
 	*vf_tun = false;
 
@@ -1627,7 +1653,7 @@ mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
 	 * (1) there's no error
 	 * (2) there's an encap action and we don't have valid neigh
 	 */
-	if (!encap_valid)
+	if (!encap_valid || flow_flag_test(flow, SLOW))
 		flow->rule[0] = mlx5e_tc_offload_to_slow_path(esw, flow, &parse_attr->spec);
 	else
 		flow->rule[0] = mlx5e_tc_offload_fdb_rules(esw, flow, &parse_attr->spec, attr);
@@ -1712,6 +1738,8 @@ static void mlx5e_tc_del_fdb_flow(struct mlx5e_priv *priv,
 	if (flow_flag_test(flow, L3_TO_L2_DECAP))
 		mlx5e_detach_decap(priv, flow);
 
+	free_flow_post_acts(flow);
+
 	kvfree(attr->esw_attr->rx_tun_attr);
 	kvfree(attr->parse_attr);
 	kfree(flow->attr);
@@ -1719,7 +1747,10 @@ static void mlx5e_tc_del_fdb_flow(struct mlx5e_priv *priv,
 
 struct mlx5_fc *mlx5e_tc_get_counter(struct mlx5e_tc_flow *flow)
 {
-	return flow->attr->counter;
+	struct mlx5_flow_attr *attr;
+
+	attr = list_first_entry(&flow->attrs, struct mlx5_flow_attr, list);
+	return attr->counter;
 }
 
 /* Iterate over tmp_list of flows attached to flow_list head. */
@@ -3316,52 +3347,6 @@ bool mlx5e_same_hw_devs(struct mlx5e_priv *priv, struct mlx5e_priv *peer_priv)
 	return (fsystem_guid == psystem_guid);
 }
 
-static int
-parse_tc_actions(struct mlx5e_tc_act_parse_state *parse_state,
-		 struct flow_action *flow_action)
-{
-	struct netlink_ext_ack *extack = parse_state->extack;
-	struct mlx5e_tc_flow *flow = parse_state->flow;
-	struct mlx5_flow_attr *attr = flow->attr;
-	enum mlx5_flow_namespace_type ns_type;
-	struct mlx5e_priv *priv = flow->priv;
-	const struct flow_action_entry *act;
-	struct mlx5e_tc_act *tc_act;
-	int err, i;
-
-	ns_type = mlx5e_get_flow_namespace(flow);
-
-	flow_action_for_each(i, act, flow_action) {
-		tc_act = mlx5e_tc_act_get(act->id, ns_type);
-		if (!tc_act) {
-			NL_SET_ERR_MSG_MOD(extack, "Not implemented offload action");
-			return -EOPNOTSUPP;
-		}
-
-		if (!tc_act->can_offload(parse_state, act, i, attr))
-			return -EOPNOTSUPP;
-
-		err = tc_act->parse_action(parse_state, act, priv, attr);
-		if (err)
-			return err;
-
-		parse_state->actions |= attr->action;
-	}
-
-	flow_action_for_each(i, act, flow_action) {
-		tc_act = mlx5e_tc_act_get(act->id, ns_type);
-		if (!tc_act || !tc_act->post_parse ||
-		    !tc_act->can_offload(parse_state, act, i, attr))
-			continue;
-
-		err = tc_act->post_parse(parse_state, priv, attr);
-		if (err)
-			return err;
-	}
-
-	return 0;
-}
-
 static int
 actions_prepare_mod_hdr_actions(struct mlx5e_priv *priv,
 				struct mlx5e_tc_flow *flow,
@@ -3400,6 +3385,300 @@ actions_prepare_mod_hdr_actions(struct mlx5e_priv *priv,
 	return 0;
 }
 
+static struct mlx5_flow_attr*
+mlx5e_clone_flow_attr_for_post_act(struct mlx5_flow_attr *attr,
+				   enum mlx5_flow_namespace_type ns_type)
+{
+	struct mlx5e_tc_flow_parse_attr *parse_attr;
+	u32 attr_sz = ns_to_attr_sz(ns_type);
+	struct mlx5_flow_attr *attr2;
+
+	attr2 = mlx5_alloc_flow_attr(ns_type);
+	parse_attr = kvzalloc(sizeof(*parse_attr), GFP_KERNEL);
+	if (!attr2 || !parse_attr) {
+		kvfree(parse_attr);
+		kfree(attr2);
+		return attr2;
+	}
+
+	memcpy(attr2, attr, attr_sz);
+	INIT_LIST_HEAD(&attr2->list);
+	parse_attr->filter_dev = attr->parse_attr->filter_dev;
+	attr2->action = 0;
+	attr2->flags = 0;
+	attr2->parse_attr = parse_attr;
+	return attr2;
+}
+
+static struct mlx5_core_dev *
+get_flow_counter_dev(struct mlx5e_tc_flow *flow)
+{
+	return mlx5e_is_eswitch_flow(flow) ? flow->attr->esw_attr->counter_dev : flow->priv->mdev;
+}
+
+struct mlx5_flow_attr *
+mlx5e_tc_get_encap_attr(struct mlx5e_tc_flow *flow)
+{
+	struct mlx5_esw_flow_attr *esw_attr;
+	struct mlx5_flow_attr *attr;
+	int i;
+
+	list_for_each_entry(attr, &flow->attrs, list) {
+		esw_attr = attr->esw_attr;
+		for (i = 0; i < MLX5_MAX_FLOW_FWD_VPORTS; i++) {
+			if (esw_attr->dests[i].flags & MLX5_ESW_DEST_ENCAP)
+				return attr;
+		}
+	}
+
+	return NULL;
+}
+
+void
+mlx5e_tc_unoffload_flow_post_acts(struct mlx5e_tc_flow *flow)
+{
+	struct mlx5e_post_act *post_act = get_post_action(flow->priv);
+	struct mlx5_flow_attr *attr;
+
+	list_for_each_entry(attr, &flow->attrs, list) {
+		if (list_is_last(&attr->list, &flow->attrs))
+			break;
+
+		mlx5e_tc_post_act_unoffload(post_act, attr->post_act_handle);
+	}
+}
+
+static void
+free_flow_post_acts(struct mlx5e_tc_flow *flow)
+{
+	struct mlx5_core_dev *counter_dev = get_flow_counter_dev(flow);
+	struct mlx5e_post_act *post_act = get_post_action(flow->priv);
+	struct mlx5_flow_attr *attr, *tmp;
+	bool vf_tun;
+
+	list_for_each_entry_safe(attr, tmp, &flow->attrs, list) {
+		if (list_is_last(&attr->list, &flow->attrs))
+			break;
+
+		if (attr->post_act_handle)
+			mlx5e_tc_post_act_del(post_act, attr->post_act_handle);
+
+		clean_encap_dests(flow->priv, flow, attr, &vf_tun);
+
+		if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT)
+			mlx5_fc_destroy(counter_dev, attr->counter);
+
+		if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
+			mlx5e_mod_hdr_dealloc(&attr->parse_attr->mod_hdr_acts);
+			if (attr->modify_hdr)
+				mlx5_modify_header_dealloc(flow->priv->mdev, attr->modify_hdr);
+		}
+
+		list_del(&attr->list);
+		kvfree(attr->parse_attr);
+		kfree(attr);
+	}
+}
+
+int
+mlx5e_tc_offload_flow_post_acts(struct mlx5e_tc_flow *flow)
+{
+	struct mlx5e_post_act *post_act = get_post_action(flow->priv);
+	struct mlx5_flow_attr *attr;
+	int err = 0;
+
+	list_for_each_entry(attr, &flow->attrs, list) {
+		if (list_is_last(&attr->list, &flow->attrs))
+			break;
+
+		err = mlx5e_tc_post_act_offload(post_act, attr->post_act_handle);
+		if (err)
+			break;
+	}
+
+	return err;
+}
+
+/* TC filter rule HW translation:
+ *
+ * +---------------------+
+ * + ft prio (tc chain)  +
+ * + original match      +
+ * +---------------------+
+ *           |
+ *           | if multi table action
+ *           |
+ *           v
+ * +---------------------+
+ * + post act ft         |<----.
+ * + match fte id        |     | split on multi table action
+ * + do actions          |-----'
+ * +---------------------+
+ *           |
+ *           |
+ *           v
+ * Do rest of the actions after last multi table action.
+ */
+static int
+alloc_flow_post_acts(struct mlx5e_tc_flow *flow, struct netlink_ext_ack *extack)
+{
+	struct mlx5e_post_act *post_act = get_post_action(flow->priv);
+	struct mlx5_flow_attr *attr, *next_attr = NULL;
+	struct mlx5e_post_act_handle *handle;
+	bool vf_tun, encap_valid = true;
+	int err;
+
+	/* This is going in reverse order as needed.
+	 * The first entry is the last attribute.
+	 */
+	list_for_each_entry(attr, &flow->attrs, list) {
+		if (!next_attr) {
+			/* Set counter action on last post act rule. */
+			attr->action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
+		} else {
+			attr->action &= ~MLX5_FLOW_CONTEXT_ACTION_COUNT;
+			err = mlx5e_tc_act_set_next_post_act(flow, attr, next_attr);
+			if (err)
+				goto out_free;
+		}
+
+		/* Don't add post_act rule for first attr (last in the list).
+		 * It's being handled by the caller.
+		 */
+		if (list_is_last(&attr->list, &flow->attrs))
+			break;
+
+		err = set_encap_dests(flow->priv, flow, attr, extack, &encap_valid, &vf_tun);
+		if (err)
+			goto out_free;
+
+		if (!encap_valid)
+			flow_flag_set(flow, SLOW);
+
+		err = actions_prepare_mod_hdr_actions(flow->priv, flow, attr, extack);
+		if (err)
+			goto out_free;
+
+		if (attr->action & MLX5_FLOW_CONTEXT_ACTION_MOD_HDR) {
+			err = mlx5e_tc_add_flow_mod_hdr(flow->priv, flow, attr);
+			if (err)
+				goto out_free;
+		}
+
+		if (attr->action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
+			err = alloc_flow_attr_counter(get_flow_counter_dev(flow), attr);
+			if (err)
+				goto out_free;
+		}
+
+		handle = mlx5e_tc_post_act_add(post_act, attr);
+		if (IS_ERR(handle)) {
+			err = PTR_ERR(handle);
+			goto out_free;
+		}
+
+		attr->post_act_handle = handle;
+		next_attr = attr;
+	}
+
+	if (flow_flag_test(flow, SLOW))
+		goto out;
+
+	err = mlx5e_tc_offload_flow_post_acts(flow);
+	if (err)
+		goto out_free;
+
+out:
+	return 0;
+
+out_free:
+	free_flow_post_acts(flow);
+	return err;
+}
+
+static int
+parse_tc_actions(struct mlx5e_tc_act_parse_state *parse_state,
+		 struct flow_action *flow_action)
+{
+	struct netlink_ext_ack *extack = parse_state->extack;
+	struct mlx5e_tc_flow_action flow_action_reorder;
+	struct mlx5e_tc_flow *flow = parse_state->flow;
+	struct mlx5_flow_attr *attr = flow->attr;
+	enum mlx5_flow_namespace_type ns_type;
+	struct mlx5e_priv *priv = flow->priv;
+	struct flow_action_entry *act, **_act;
+	struct mlx5e_tc_act *tc_act;
+	int err, i;
+
+	flow_action_reorder.num_entries = flow_action->num_entries;
+	flow_action_reorder.entries = kcalloc(flow_action->num_entries,
+					      sizeof(flow_action), GFP_KERNEL);
+	if (!flow_action_reorder.entries)
+		return -ENOMEM;
+
+	mlx5e_tc_act_reorder_flow_actions(flow_action, &flow_action_reorder);
+
+	ns_type = mlx5e_get_flow_namespace(flow);
+	list_add(&attr->list, &flow->attrs);
+
+	flow_action_for_each(i, _act, &flow_action_reorder) {
+		act = *_act;
+		tc_act = mlx5e_tc_act_get(act->id, ns_type);
+		if (!tc_act) {
+			NL_SET_ERR_MSG_MOD(extack, "Not implemented offload action");
+			err = -EOPNOTSUPP;
+			goto out_free;
+		}
+
+		if (!tc_act->can_offload(parse_state, act, i, attr)) {
+			err = -EOPNOTSUPP;
+			goto out_free;
+		}
+
+		err = tc_act->parse_action(parse_state, act, priv, attr);
+		if (err)
+			goto out_free;
+
+		parse_state->actions |= attr->action;
+
+		/* Split attr for multi table act if not the last act. */
+		if (tc_act->is_multi_table_act &&
+		    tc_act->is_multi_table_act(priv, act, attr) &&
+		    i < flow_action_reorder.num_entries - 1) {
+			err = mlx5e_tc_act_post_parse(parse_state, flow_action, attr, ns_type);
+			if (err)
+				goto out_free;
+
+			attr = mlx5e_clone_flow_attr_for_post_act(flow->attr, ns_type);
+			if (!attr) {
+				err = -ENOMEM;
+				goto out_free;
+			}
+
+			list_add(&attr->list, &flow->attrs);
+		}
+	}
+
+	kfree(flow_action_reorder.entries);
+
+	err = mlx5e_tc_act_post_parse(parse_state, flow_action, attr, ns_type);
+	if (err)
+		goto out_free_post_acts;
+
+	err = alloc_flow_post_acts(flow, extack);
+	if (err)
+		goto out_free_post_acts;
+
+	return 0;
+
+out_free:
+	kfree(flow_action_reorder.entries);
+out_free_post_acts:
+	free_flow_post_acts(flow);
+
+	return err;
+}
+
 static int
 flow_action_supported(struct flow_action *flow_action,
 		      struct netlink_ext_ack *extack)
@@ -3652,7 +3931,12 @@ mlx5_alloc_flow_attr(enum mlx5_flow_namespace_type type)
 				sizeof(struct mlx5_nic_flow_attr);
 	struct mlx5_flow_attr *attr;
 
-	return kzalloc(sizeof(*attr) + ex_attr_size, GFP_KERNEL);
+	attr = kzalloc(sizeof(*attr) + ex_attr_size, GFP_KERNEL);
+	if (!attr)
+		return attr;
+
+	INIT_LIST_HEAD(&attr->list);
+	return attr;
 }
 
 static int
@@ -3686,6 +3970,7 @@ mlx5e_alloc_flow(struct mlx5e_priv *priv, int attr_size,
 		INIT_LIST_HEAD(&flow->encaps[out_index].list);
 	INIT_LIST_HEAD(&flow->hairpin);
 	INIT_LIST_HEAD(&flow->l3_to_l2_reformat);
+	INIT_LIST_HEAD(&flow->attrs);
 	refcount_set(&flow->refcnt, 1);
 	init_completion(&flow->init_done);
 	init_completion(&flow->del_hw_done);

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

@@ -53,7 +53,6 @@
 			    ESW_FLOW_ATTR_SZ :\
 			    NIC_FLOW_ATTR_SZ)
 
-
 int mlx5e_tc_num_filters(struct mlx5e_priv *priv, unsigned long flags);
 
 struct mlx5e_tc_update_priv {
@@ -84,6 +83,8 @@ struct mlx5_flow_attr {
 	u8 tun_ip_version;
 	int tunnel_id; /* mapped tunnel id */
 	u32 flags;
+	struct list_head list;
+	struct mlx5e_post_act_handle *post_act_handle;
 	union {
 		struct mlx5_esw_flow_attr esw_attr[0];
 		struct mlx5_nic_flow_attr nic_attr[0];