1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved. 3 4#include <linux/if_vlan.h> 5#include "act.h" 6#include "vlan.h" 7#include "en/tc_priv.h" 8 9struct pedit_headers_action; 10 11int 12mlx5e_tc_act_vlan_add_rewrite_action(struct mlx5e_priv *priv, int namespace, 13 const struct flow_action_entry *act, 14 struct mlx5e_tc_flow_parse_attr *parse_attr, 15 u32 *action, struct netlink_ext_ack *extack) 16{ 17 u16 mask16 = VLAN_VID_MASK; 18 u16 val16 = act->vlan.vid & VLAN_VID_MASK; 19 const struct flow_action_entry pedit_act = { 20 .id = FLOW_ACTION_MANGLE, 21 .mangle.htype = FLOW_ACT_MANGLE_HDR_TYPE_ETH, 22 .mangle.offset = offsetof(struct vlan_ethhdr, h_vlan_TCI), 23 .mangle.mask = ~(u32)be16_to_cpu(*(__be16 *)&mask16), 24 .mangle.val = (u32)be16_to_cpu(*(__be16 *)&val16), 25 }; 26 u8 match_prio_mask, match_prio_val; 27 void *headers_c, *headers_v; 28 int err; 29 30 headers_c = mlx5e_get_match_headers_criteria(*action, &parse_attr->spec); 31 headers_v = mlx5e_get_match_headers_value(*action, &parse_attr->spec); 32 33 if (!(MLX5_GET(fte_match_set_lyr_2_4, headers_c, cvlan_tag) && 34 MLX5_GET(fte_match_set_lyr_2_4, headers_v, cvlan_tag))) { 35 NL_SET_ERR_MSG_MOD(extack, "VLAN rewrite action must have VLAN protocol match"); 36 return -EOPNOTSUPP; 37 } 38 39 match_prio_mask = MLX5_GET(fte_match_set_lyr_2_4, headers_c, first_prio); 40 match_prio_val = MLX5_GET(fte_match_set_lyr_2_4, headers_v, first_prio); 41 if (act->vlan.prio != (match_prio_val & match_prio_mask)) { 42 NL_SET_ERR_MSG_MOD(extack, "Changing VLAN prio is not supported"); 43 return -EOPNOTSUPP; 44 } 45 46 err = mlx5e_tc_act_pedit_parse_action(priv, &pedit_act, namespace, parse_attr->hdrs, 47 extack); 48 *action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR; 49 50 return err; 51} 52 53static int 54tc_act_parse_vlan_mangle(struct mlx5e_tc_act_parse_state *parse_state, 55 const struct flow_action_entry *act, 56 struct mlx5e_priv *priv, 57 struct mlx5_flow_attr *attr) 58{ 59 enum mlx5_flow_namespace_type ns_type; 60 int err; 61 62 ns_type = mlx5e_get_flow_namespace(parse_state->flow); 63 err = mlx5e_tc_act_vlan_add_rewrite_action(priv, ns_type, act, attr->parse_attr, 64 &attr->action, parse_state->extack); 65 if (err) 66 return err; 67 68 if (ns_type == MLX5_FLOW_NAMESPACE_FDB) { 69 attr->esw_attr->split_count = attr->esw_attr->out_count; 70 parse_state->if_count = 0; 71 } 72 73 return 0; 74} 75 76struct mlx5e_tc_act mlx5e_tc_act_vlan_mangle = { 77 .parse_action = tc_act_parse_vlan_mangle, 78}; 79