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 9 struct pedit_headers_action; 10 11 int 12 mlx5e_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 53 static bool 54 tc_act_can_offload_vlan_mangle(struct mlx5e_tc_act_parse_state *parse_state, 55 const struct flow_action_entry *act, 56 int act_index, 57 struct mlx5_flow_attr *attr) 58 { 59 return true; 60 } 61 62 static int 63 tc_act_parse_vlan_mangle(struct mlx5e_tc_act_parse_state *parse_state, 64 const struct flow_action_entry *act, 65 struct mlx5e_priv *priv, 66 struct mlx5_flow_attr *attr) 67 { 68 enum mlx5_flow_namespace_type ns_type; 69 int err; 70 71 ns_type = mlx5e_get_flow_namespace(parse_state->flow); 72 err = mlx5e_tc_act_vlan_add_rewrite_action(priv, ns_type, act, attr->parse_attr, 73 &attr->action, parse_state->extack); 74 if (err) 75 return err; 76 77 if (ns_type == MLX5_FLOW_NAMESPACE_FDB) 78 attr->esw_attr->split_count = attr->esw_attr->out_count; 79 80 return 0; 81 } 82 83 struct mlx5e_tc_act mlx5e_tc_act_vlan_mangle = { 84 .can_offload = tc_act_can_offload_vlan_mangle, 85 .parse_action = tc_act_parse_vlan_mangle, 86 }; 87