ct.c

 1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
 2// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 3
 4#include "act.h"
 5#include "en/tc_priv.h"
 6#include "en/tc_ct.h"
 7
 8static bool
 9tc_act_can_offload_ct(struct mlx5e_tc_act_parse_state *parse_state,
10		      const struct flow_action_entry *act,
11		      int act_index,
12		      struct mlx5_flow_attr *attr)
13{
14	return !((act->ct.action & TCA_CT_ACT_COMMIT) &&
15		 flow_action_is_last_entry(parse_state->flow_action, act));
16}
17
18static int
19tc_act_parse_ct(struct mlx5e_tc_act_parse_state *parse_state,
20		const struct flow_action_entry *act,
21		struct mlx5e_priv *priv,
22		struct mlx5_flow_attr *attr)
23{
24	int err;
25
26	err = mlx5_tc_ct_parse_action(parse_state->ct_priv, attr, act, parse_state->extack);
27	if (err)
28		return err;
29
30	if (mlx5e_is_eswitch_flow(parse_state->flow)) {
31		attr->esw_attr->split_count = attr->esw_attr->out_count;
32		parse_state->if_count = 0;
33	}
34
35	attr->flags |= MLX5_ATTR_FLAG_CT;
36
37	return 0;
38}
39
40static int
41tc_act_post_parse_ct(struct mlx5e_tc_act_parse_state *parse_state,
42		     struct mlx5e_priv *priv,
43		     struct mlx5_flow_attr *attr)
44{
45	if (!(attr->flags & MLX5_ATTR_FLAG_CT))
46		return 0;
47
48	return mlx5_tc_ct_flow_offload(parse_state->ct_priv, attr);
49}
50
51static bool
52tc_act_is_multi_table_act_ct(struct mlx5e_priv *priv,
53			     const struct flow_action_entry *act,
54			     struct mlx5_flow_attr *attr)
55{
56	if (act->ct.action & TCA_CT_ACT_CLEAR)
57		return false;
58
59	return true;
60}
61
62static bool
63tc_act_is_missable_ct(const struct flow_action_entry *act)
64{
65	return !(act->ct.action & TCA_CT_ACT_CLEAR);
66}
67
68struct mlx5e_tc_act mlx5e_tc_act_ct = {
69	.can_offload = tc_act_can_offload_ct,
70	.parse_action = tc_act_parse_ct,
71	.post_parse = tc_act_post_parse_ct,
72	.is_multi_table_act = tc_act_is_multi_table_act_ct,
73	.is_missable = tc_act_is_missable_ct,
74};
75