drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/mirred_nic.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
   7 static bool
   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
  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 };