1d386939aSYevgeny Kliteynik // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2d386939aSYevgeny Kliteynik /* Copyright (c) 2018 Mellanox Technologies. */
3d386939aSYevgeny Kliteynik
4d386939aSYevgeny Kliteynik #include <net/gre.h>
5d386939aSYevgeny Kliteynik #include "en/tc_tun.h"
6d386939aSYevgeny Kliteynik
mlx5e_tc_tun_can_offload_gretap(struct mlx5e_priv * priv)7d386939aSYevgeny Kliteynik static bool mlx5e_tc_tun_can_offload_gretap(struct mlx5e_priv *priv)
8d386939aSYevgeny Kliteynik {
9d386939aSYevgeny Kliteynik return !!MLX5_CAP_ESW(priv->mdev, nvgre_encap_decap);
10d386939aSYevgeny Kliteynik }
11d386939aSYevgeny Kliteynik
mlx5e_tc_tun_calc_hlen_gretap(struct mlx5e_encap_entry * e)12d386939aSYevgeny Kliteynik static int mlx5e_tc_tun_calc_hlen_gretap(struct mlx5e_encap_entry *e)
13d386939aSYevgeny Kliteynik {
14d386939aSYevgeny Kliteynik return gre_calc_hlen(e->tun_info->key.tun_flags);
15d386939aSYevgeny Kliteynik }
16d386939aSYevgeny Kliteynik
mlx5e_tc_tun_init_encap_attr_gretap(struct net_device * tunnel_dev,struct mlx5e_priv * priv,struct mlx5e_encap_entry * e,struct netlink_ext_ack * extack)17d386939aSYevgeny Kliteynik static int mlx5e_tc_tun_init_encap_attr_gretap(struct net_device *tunnel_dev,
18d386939aSYevgeny Kliteynik struct mlx5e_priv *priv,
19d386939aSYevgeny Kliteynik struct mlx5e_encap_entry *e,
20d386939aSYevgeny Kliteynik struct netlink_ext_ack *extack)
21d386939aSYevgeny Kliteynik {
22d386939aSYevgeny Kliteynik e->tunnel = &gre_tunnel;
23d386939aSYevgeny Kliteynik e->reformat_type = MLX5_REFORMAT_TYPE_L2_TO_NVGRE;
24d386939aSYevgeny Kliteynik return 0;
25d386939aSYevgeny Kliteynik }
26d386939aSYevgeny Kliteynik
mlx5e_gen_ip_tunnel_header_gretap(char buf[],__u8 * ip_proto,struct mlx5e_encap_entry * e)27d386939aSYevgeny Kliteynik static int mlx5e_gen_ip_tunnel_header_gretap(char buf[],
28d386939aSYevgeny Kliteynik __u8 *ip_proto,
29d386939aSYevgeny Kliteynik struct mlx5e_encap_entry *e)
30d386939aSYevgeny Kliteynik {
31d386939aSYevgeny Kliteynik const struct ip_tunnel_key *tun_key = &e->tun_info->key;
32d386939aSYevgeny Kliteynik struct gre_base_hdr *greh = (struct gre_base_hdr *)(buf);
33d386939aSYevgeny Kliteynik __be32 tun_id = tunnel_id_to_key32(tun_key->tun_id);
34d386939aSYevgeny Kliteynik int hdr_len;
35d386939aSYevgeny Kliteynik
36d386939aSYevgeny Kliteynik *ip_proto = IPPROTO_GRE;
37d386939aSYevgeny Kliteynik
38d386939aSYevgeny Kliteynik /* the HW does not calculate GRE csum or sequences */
39d386939aSYevgeny Kliteynik if (tun_key->tun_flags & (TUNNEL_CSUM | TUNNEL_SEQ))
40d386939aSYevgeny Kliteynik return -EOPNOTSUPP;
41d386939aSYevgeny Kliteynik
42d386939aSYevgeny Kliteynik greh->protocol = htons(ETH_P_TEB);
43d386939aSYevgeny Kliteynik
44d386939aSYevgeny Kliteynik /* GRE key */
45d386939aSYevgeny Kliteynik hdr_len = mlx5e_tc_tun_calc_hlen_gretap(e);
46d386939aSYevgeny Kliteynik greh->flags = gre_tnl_flags_to_gre_flags(tun_key->tun_flags);
47d386939aSYevgeny Kliteynik if (tun_key->tun_flags & TUNNEL_KEY) {
48d386939aSYevgeny Kliteynik __be32 *ptr = (__be32 *)(((u8 *)greh) + hdr_len - 4);
49d386939aSYevgeny Kliteynik *ptr = tun_id;
50d386939aSYevgeny Kliteynik }
51d386939aSYevgeny Kliteynik
52d386939aSYevgeny Kliteynik return 0;
53d386939aSYevgeny Kliteynik }
54d386939aSYevgeny Kliteynik
mlx5e_tc_tun_parse_gretap(struct mlx5e_priv * priv,struct mlx5_flow_spec * spec,struct flow_cls_offload * f,void * headers_c,void * headers_v)55d386939aSYevgeny Kliteynik static int mlx5e_tc_tun_parse_gretap(struct mlx5e_priv *priv,
56d386939aSYevgeny Kliteynik struct mlx5_flow_spec *spec,
57f9e30088SPablo Neira Ayuso struct flow_cls_offload *f,
58d386939aSYevgeny Kliteynik void *headers_c,
59d386939aSYevgeny Kliteynik void *headers_v)
60d386939aSYevgeny Kliteynik {
61d386939aSYevgeny Kliteynik void *misc_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, misc_parameters);
62d386939aSYevgeny Kliteynik void *misc_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, misc_parameters);
63f9e30088SPablo Neira Ayuso struct flow_rule *rule = flow_cls_offload_flow_rule(f);
64d386939aSYevgeny Kliteynik
65d386939aSYevgeny Kliteynik MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol);
66d386939aSYevgeny Kliteynik MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_GRE);
67d386939aSYevgeny Kliteynik
68d386939aSYevgeny Kliteynik /* gre protocol */
69d386939aSYevgeny Kliteynik MLX5_SET_TO_ONES(fte_match_set_misc, misc_c, gre_protocol);
70d386939aSYevgeny Kliteynik MLX5_SET(fte_match_set_misc, misc_v, gre_protocol, ETH_P_TEB);
71d386939aSYevgeny Kliteynik
72d386939aSYevgeny Kliteynik /* gre key */
73d386939aSYevgeny Kliteynik if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
74d386939aSYevgeny Kliteynik struct flow_match_enc_keyid enc_keyid;
75d386939aSYevgeny Kliteynik
76d386939aSYevgeny Kliteynik flow_rule_match_enc_keyid(rule, &enc_keyid);
77d386939aSYevgeny Kliteynik MLX5_SET(fte_match_set_misc, misc_c,
78d386939aSYevgeny Kliteynik gre_key.key, be32_to_cpu(enc_keyid.mask->keyid));
79d386939aSYevgeny Kliteynik MLX5_SET(fte_match_set_misc, misc_v,
80d386939aSYevgeny Kliteynik gre_key.key, be32_to_cpu(enc_keyid.key->keyid));
81d386939aSYevgeny Kliteynik }
82d386939aSYevgeny Kliteynik
830faddfe6SJianbo Liu spec->match_criteria_enable |= MLX5_MATCH_MISC_PARAMETERS;
840faddfe6SJianbo Liu
85d386939aSYevgeny Kliteynik return 0;
86d386939aSYevgeny Kliteynik }
87d386939aSYevgeny Kliteynik
88d386939aSYevgeny Kliteynik struct mlx5e_tc_tunnel gre_tunnel = {
89d386939aSYevgeny Kliteynik .tunnel_type = MLX5E_TC_TUNNEL_TYPE_GRETAP,
90d386939aSYevgeny Kliteynik .match_level = MLX5_MATCH_L3,
91d386939aSYevgeny Kliteynik .can_offload = mlx5e_tc_tun_can_offload_gretap,
92d386939aSYevgeny Kliteynik .calc_hlen = mlx5e_tc_tun_calc_hlen_gretap,
93d386939aSYevgeny Kliteynik .init_encap_attr = mlx5e_tc_tun_init_encap_attr_gretap,
94d386939aSYevgeny Kliteynik .generate_ip_tun_hdr = mlx5e_gen_ip_tunnel_header_gretap,
95d386939aSYevgeny Kliteynik .parse_udp_ports = NULL,
96d386939aSYevgeny Kliteynik .parse_tunnel = mlx5e_tc_tun_parse_gretap,
97*929a2fadSDima Chumak .encap_info_equal = mlx5e_tc_tun_encap_info_equal_generic,
98d386939aSYevgeny Kliteynik };
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