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 {
  12         struct netlink_ext_ack *extack = parse_state->extack;
  13         struct mlx5e_tc_flow *flow = parse_state->flow;
  14         struct net_device *out_dev = act->dev;
  15         struct mlx5e_priv *priv = flow->priv;
  16
  17         if (act->id != FLOW_ACTION_REDIRECT)
  18                 return false;
  19
  20         if (priv->netdev->netdev_ops != out_dev->netdev_ops ||
  21             !mlx5e_same_hw_devs(priv, netdev_priv(out_dev))) {
  22                 NL_SET_ERR_MSG_MOD(extack,
  23                                    "devices are not on same switch HW, can't offload forwarding");
  24                 netdev_warn(priv->netdev,
  25                             "devices %s %s not on same switch HW, can't offload forwarding\n",
  26                             netdev_name(priv->netdev),
  27                             out_dev->name);
  28                 return false;
  29         }
  30
  31         return true;
  32 }
  33
  34 static int
  35 tc_act_parse_mirred_nic(struct mlx5e_tc_act_parse_state *parse_state,
  36                         const struct flow_action_entry *act,
  37                         struct mlx5e_priv *priv,
  38                         struct mlx5_flow_attr *attr)
  39 {
  40         attr->parse_attr->mirred_ifindex[0] = act->dev->ifindex;
  41         flow_flag_set(parse_state->flow, HAIRPIN);
  42         attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
  43                         MLX5_FLOW_CONTEXT_ACTION_COUNT;
  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 };