xref: /linux/drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/mirred_nic.c (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18)
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