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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#include <net/bareudp.h>
#include "act.h"
#include "en/tc_priv.h"
static bool
tc_act_can_offload_mpls_push(struct mlx5e_tc_act_parse_state *parse_state,
const struct flow_action_entry *act,
int act_index)
{
struct netlink_ext_ack *extack = parse_state->extack;
struct mlx5e_priv *priv = parse_state->flow->priv;
if (!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, reformat_l2_to_l3_tunnel) ||
act->mpls_push.proto != htons(ETH_P_MPLS_UC)) {
NL_SET_ERR_MSG_MOD(extack, "mpls push is supported only for mpls_uc protocol");
return false;
}
return true;
}
static void
copy_mpls_info(struct mlx5e_mpls_info *mpls_info,
const struct flow_action_entry *act)
{
mpls_info->label = act->mpls_push.label;
mpls_info->tc = act->mpls_push.tc;
mpls_info->bos = act->mpls_push.bos;
mpls_info->ttl = act->mpls_push.ttl;
}
static int
tc_act_parse_mpls_push(struct mlx5e_tc_act_parse_state *parse_state,
const struct flow_action_entry *act,
struct mlx5e_priv *priv,
struct mlx5_flow_attr *attr)
{
parse_state->mpls_push = true;
copy_mpls_info(&parse_state->mpls_info, act);
return 0;
}
static bool
tc_act_can_offload_mpls_pop(struct mlx5e_tc_act_parse_state *parse_state,
const struct flow_action_entry *act,
int act_index)
{
struct netlink_ext_ack *extack = parse_state->extack;
struct mlx5e_tc_flow *flow = parse_state->flow;
struct net_device *filter_dev;
filter_dev = flow->attr->parse_attr->filter_dev;
/* we only support mpls pop if it is the first action
* and the filter net device is bareudp. Subsequent
* actions can be pedit and the last can be mirred
* egress redirect.
*/
if (act_index) {
NL_SET_ERR_MSG_MOD(extack, "mpls pop supported only as first action");
return false;
}
if (!netif_is_bareudp(filter_dev)) {
NL_SET_ERR_MSG_MOD(extack, "mpls pop supported only on bareudp devices");
return false;
}
return true;
}
static int
tc_act_parse_mpls_pop(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->eth.h_proto = act->mpls_pop.proto;
attr->action |= MLX5_FLOW_CONTEXT_ACTION_PACKET_REFORMAT;
flow_flag_set(parse_state->flow, L3_TO_L2_DECAP);
return 0;
}
struct mlx5e_tc_act mlx5e_tc_act_mpls_push = {
.can_offload = tc_act_can_offload_mpls_push,
.parse_action = tc_act_parse_mpls_push,
};
struct mlx5e_tc_act mlx5e_tc_act_mpls_pop = {
.can_offload = tc_act_can_offload_mpls_pop,
.parse_action = tc_act_parse_mpls_pop,
};
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