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
7static bool
8tc_act_can_offload_mirred_nic(struct mlx5e_tc_act_parse_state *parse_state,
9			      const struct flow_action_entry *act,
10			      int act_index,
11			      struct mlx5_flow_attr *attr)
12{
13	struct netlink_ext_ack *extack = parse_state->extack;
14	struct mlx5e_tc_flow *flow = parse_state->flow;
15	struct net_device *out_dev = act->dev;
16	struct mlx5e_priv *priv = flow->priv;
17
18	if (act->id != FLOW_ACTION_REDIRECT)
19		return false;
20
21	if (priv->netdev->netdev_ops != out_dev->netdev_ops ||
22	    !mlx5e_same_hw_devs(priv, netdev_priv(out_dev))) {
23		NL_SET_ERR_MSG_MOD(extack,
24				   "devices are not on same switch HW, can't offload forwarding");
25		netdev_warn(priv->netdev,
26			    "devices %s %s not on same switch HW, can't offload forwarding\n",
27			    netdev_name(priv->netdev),
28			    out_dev->name);
29		return false;
30	}
31
32	return true;
33}
34
35static int
36tc_act_parse_mirred_nic(struct mlx5e_tc_act_parse_state *parse_state,
37			const struct flow_action_entry *act,
38			struct mlx5e_priv *priv,
39			struct mlx5_flow_attr *attr)
40{
41	attr->parse_attr->mirred_ifindex[0] = act->dev->ifindex;
42	flow_flag_set(parse_state->flow, HAIRPIN);
43	attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
44
45	return 0;
46}
47
48struct mlx5e_tc_act mlx5e_tc_act_mirred_nic = {
49	.can_offload = tc_act_can_offload_mirred_nic,
50	.parse_action = tc_act_parse_mirred_nic,
51	.is_terminating_action = true,
52};
53