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
7 static bool
tc_act_can_offload_mirred_nic(struct mlx5e_tc_act_parse_state * parse_state,const struct flow_action_entry * act,int act_index,struct mlx5_flow_attr * attr)8 tc_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
35 static int
tc_act_parse_mirred_nic(struct mlx5e_tc_act_parse_state * parse_state,const struct flow_action_entry * act,struct mlx5e_priv * priv,struct mlx5_flow_attr * attr)36 tc_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
48 struct 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