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
mlx5e_tc_act_vlan_add_rewrite_action(struct mlx5e_priv * priv,int namespace,const struct flow_action_entry * act,struct mlx5e_tc_flow_parse_attr * parse_attr,u32 * action,struct netlink_ext_ack * extack)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 int
tc_act_parse_vlan_mangle(struct mlx5e_tc_act_parse_state * parse_state,const struct flow_action_entry * act,struct mlx5e_priv * priv,struct mlx5_flow_attr * attr)54 tc_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
76 struct mlx5e_tc_act mlx5e_tc_act_vlan_mangle = {
77 .parse_action = tc_act_parse_vlan_mangle,
78 };
79