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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
#include <linux/if_vlan.h>
#include "act.h"
#include "vlan.h"
#include "en/tc_priv.h"
static int
add_vlan_prio_tag_rewrite_action(struct mlx5e_priv *priv,
struct mlx5e_tc_flow_parse_attr *parse_attr,
struct pedit_headers_action *hdrs,
u32 *action, struct netlink_ext_ack *extack)
{
const struct flow_action_entry prio_tag_act = {
.vlan.vid = 0,
.vlan.prio =
MLX5_GET(fte_match_set_lyr_2_4,
mlx5e_get_match_headers_value(*action,
&parse_attr->spec),
first_prio) &
MLX5_GET(fte_match_set_lyr_2_4,
mlx5e_get_match_headers_criteria(*action,
&parse_attr->spec),
first_prio),
};
return mlx5e_tc_act_vlan_add_rewrite_action(priv, MLX5_FLOW_NAMESPACE_FDB,
&prio_tag_act, parse_attr, hdrs, action,
extack);
}
static int
parse_tc_vlan_action(struct mlx5e_priv *priv,
const struct flow_action_entry *act,
struct mlx5_esw_flow_attr *attr,
u32 *action,
struct netlink_ext_ack *extack)
{
u8 vlan_idx = attr->total_vlan;
if (vlan_idx >= MLX5_FS_VLAN_DEPTH) {
NL_SET_ERR_MSG_MOD(extack, "Total vlans used is greater than supported");
return -EOPNOTSUPP;
}
switch (act->id) {
case FLOW_ACTION_VLAN_POP:
if (vlan_idx) {
if (!mlx5_eswitch_vlan_actions_supported(priv->mdev,
MLX5_FS_VLAN_DEPTH)) {
NL_SET_ERR_MSG_MOD(extack, "vlan pop action is not supported");
return -EOPNOTSUPP;
}
*action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP_2;
} else {
*action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
}
break;
case FLOW_ACTION_VLAN_PUSH:
attr->vlan_vid[vlan_idx] = act->vlan.vid;
attr->vlan_prio[vlan_idx] = act->vlan.prio;
attr->vlan_proto[vlan_idx] = act->vlan.proto;
if (!attr->vlan_proto[vlan_idx])
attr->vlan_proto[vlan_idx] = htons(ETH_P_8021Q);
if (vlan_idx) {
if (!mlx5_eswitch_vlan_actions_supported(priv->mdev,
MLX5_FS_VLAN_DEPTH)) {
NL_SET_ERR_MSG_MOD(extack,
"vlan push action is not supported for vlan depth > 1");
return -EOPNOTSUPP;
}
*action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH_2;
} else {
if (!mlx5_eswitch_vlan_actions_supported(priv->mdev, 1) &&
(act->vlan.proto != htons(ETH_P_8021Q) ||
act->vlan.prio)) {
NL_SET_ERR_MSG_MOD(extack, "vlan push action is not supported");
return -EOPNOTSUPP;
}
*action |= MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH;
}
break;
default:
NL_SET_ERR_MSG_MOD(extack, "Unexpected action id for VLAN");
return -EINVAL;
}
attr->total_vlan = vlan_idx + 1;
return 0;
}
int
mlx5e_tc_act_vlan_add_push_action(struct mlx5e_priv *priv,
struct mlx5_flow_attr *attr,
struct net_device **out_dev,
struct netlink_ext_ack *extack)
{
struct net_device *vlan_dev = *out_dev;
struct flow_action_entry vlan_act = {
.id = FLOW_ACTION_VLAN_PUSH,
.vlan.vid = vlan_dev_vlan_id(vlan_dev),
.vlan.proto = vlan_dev_vlan_proto(vlan_dev),
.vlan.prio = 0,
};
int err;
err = parse_tc_vlan_action(priv, &vlan_act, attr->esw_attr, &attr->action, extack);
if (err)
return err;
rcu_read_lock();
*out_dev = dev_get_by_index_rcu(dev_net(vlan_dev), dev_get_iflink(vlan_dev));
rcu_read_unlock();
if (!*out_dev)
return -ENODEV;
if (is_vlan_dev(*out_dev))
err = mlx5e_tc_act_vlan_add_push_action(priv, attr, out_dev, extack);
return err;
}
int
mlx5e_tc_act_vlan_add_pop_action(struct mlx5e_priv *priv,
struct mlx5_flow_attr *attr,
struct netlink_ext_ack *extack)
{
struct flow_action_entry vlan_act = {
.id = FLOW_ACTION_VLAN_POP,
};
int nest_level, err = 0;
nest_level = attr->parse_attr->filter_dev->lower_level -
priv->netdev->lower_level;
while (nest_level--) {
err = parse_tc_vlan_action(priv, &vlan_act, attr->esw_attr, &attr->action,
extack);
if (err)
return err;
}
return err;
}
static bool
tc_act_can_offload_vlan(struct mlx5e_tc_act_parse_state *parse_state,
const struct flow_action_entry *act,
int act_index)
{
return true;
}
static int
tc_act_parse_vlan(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;
int err;
if (act->id == FLOW_ACTION_VLAN_PUSH &&
(attr->action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP)) {
/* Replace vlan pop+push with vlan modify */
attr->action &= ~MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
err = mlx5e_tc_act_vlan_add_rewrite_action(priv, MLX5_FLOW_NAMESPACE_FDB, act,
attr->parse_attr, parse_state->hdrs,
&attr->action, parse_state->extack);
} else {
err = parse_tc_vlan_action(priv, act, esw_attr, &attr->action,
parse_state->extack);
}
if (err)
return err;
esw_attr->split_count = esw_attr->out_count;
return 0;
}
static int
tc_act_post_parse_vlan(struct mlx5e_tc_act_parse_state *parse_state,
struct mlx5e_priv *priv,
struct mlx5_flow_attr *attr)
{
struct mlx5e_tc_flow_parse_attr *parse_attr = attr->parse_attr;
struct pedit_headers_action *hdrs = parse_state->hdrs;
struct netlink_ext_ack *extack = parse_state->extack;
struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
int err;
if (MLX5_CAP_GEN(esw->dev, prio_tag_required) &&
attr->action & MLX5_FLOW_CONTEXT_ACTION_VLAN_POP) {
/* For prio tag mode, replace vlan pop with rewrite vlan prio
* tag rewrite.
*/
attr->action &= ~MLX5_FLOW_CONTEXT_ACTION_VLAN_POP;
err = add_vlan_prio_tag_rewrite_action(priv, parse_attr, hdrs,
&attr->action, extack);
if (err)
return err;
}
return 0;
}
struct mlx5e_tc_act mlx5e_tc_act_vlan = {
.can_offload = tc_act_can_offload_vlan,
.parse_action = tc_act_parse_vlan,
.post_parse = tc_act_post_parse_vlan,
};
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