// 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_redirect_ingress(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_parse_attr *parse_attr;
        struct net_device *out_dev = act->dev;
        struct mlx5_esw_flow_attr *esw_attr;

        parse_attr = attr->parse_attr;
        esw_attr = attr->esw_attr;

        if (!out_dev)
                return false;

        if (!netif_is_ovs_master(out_dev)) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "redirect to ingress is supported only for OVS internal ports");
                return false;
        }

        if (netif_is_ovs_master(parse_attr->filter_dev)) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "redirect to ingress is not supported from internal port");
                return false;
        }

        if (!parse_state->ptype_host) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "redirect to int port ingress requires ptype=host action");
                return false;
        }

        if (esw_attr->out_count) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "redirect to int port ingress is supported only as single destination");
                return false;
        }

        return true;
}

static int
tc_act_parse_redirect_ingress(struct mlx5e_tc_act_parse_state *parse_state,
                              const struct flow_action_entry *act,
                              struct mlx5e_priv *priv,
                              struct mlx5_flow_attr *attr)
{
        struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr;
        struct net_device *out_dev = act->dev;
        int err;

        attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;

        err = mlx5e_set_fwd_to_int_port_actions(priv, attr, out_dev->ifindex,
                                                MLX5E_TC_INT_PORT_INGRESS,
                                                &attr->action, esw_attr->out_count);
        if (err)
                return err;

        parse_state->if_count = 0;
        esw_attr->out_count++;

        return 0;
}

struct mlx5e_tc_act mlx5e_tc_act_redirect_ingress = {
        .can_offload = tc_act_can_offload_redirect_ingress,
        .parse_action = tc_act_parse_redirect_ingress,
};