// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.

#include "act.h"
#include "en/tc_priv.h"

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)
{
        struct netlink_ext_ack *extack = parse_state->extack;
        struct mlx5e_tc_flow *flow = parse_state->flow;
        struct net_device *out_dev = act->dev;
        struct mlx5e_priv *priv = flow->priv;

        if (act->id != FLOW_ACTION_REDIRECT)
                return false;

        if (priv->netdev->netdev_ops != out_dev->netdev_ops ||
            !mlx5e_same_hw_devs(priv, netdev_priv(out_dev))) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "devices are not on same switch HW, can't offload forwarding");
                netdev_warn(priv->netdev,
                            "devices %s %s not on same switch HW, can't offload forwarding\n",
                            netdev_name(priv->netdev),
                            out_dev->name);
                return false;
        }

        return true;
}

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)
{
        attr->parse_attr->mirred_ifindex[0] = act->dev->ifindex;
        flow_flag_set(parse_state->flow, HAIRPIN);
        attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;

        return 0;
}

struct mlx5e_tc_act mlx5e_tc_act_mirred_nic = {
        .can_offload = tc_act_can_offload_mirred_nic,
        .parse_action = tc_act_parse_mirred_nic,
        .is_terminating_action = true,
};