2 * drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
3 * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2017 Jiri Pirko <jiri@mellanox.com>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the names of the copyright holders nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
18 * Alternatively, this software may be distributed under the terms of the
19 * GNU General Public License ("GPL") version 2 as published by the Free
20 * Software Foundation.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
35 #include <linux/kernel.h>
36 #include <linux/errno.h>
37 #include <linux/netdevice.h>
38 #include <net/flow_dissector.h>
39 #include <net/pkt_cls.h>
40 #include <net/tc_act/tc_gact.h>
41 #include <net/tc_act/tc_mirred.h>
44 #include "core_acl_flex_keys.h"
46 static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
47 struct net_device *dev,
48 struct mlxsw_sp_acl_rule_info *rulei,
49 struct tcf_exts *exts)
51 const struct tc_action *a;
55 if (tc_no_actions(exts))
58 tcf_exts_to_list(exts, &actions);
59 list_for_each_entry(a, &actions, list) {
60 if (is_tcf_gact_shot(a)) {
61 err = mlxsw_sp_acl_rulei_act_drop(rulei);
64 } else if (is_tcf_mirred_egress_redirect(a)) {
65 int ifindex = tcf_mirred_ifindex(a);
66 struct net_device *out_dev;
68 out_dev = __dev_get_by_index(dev_net(dev), ifindex);
72 err = mlxsw_sp_acl_rulei_act_fwd(mlxsw_sp, rulei,
77 dev_err(mlxsw_sp->bus_info->dev, "Unsupported action\n");
84 static void mlxsw_sp_flower_parse_ipv4(struct mlxsw_sp_acl_rule_info *rulei,
85 struct tc_cls_flower_offload *f)
87 struct flow_dissector_key_ipv4_addrs *key =
88 skb_flow_dissector_target(f->dissector,
89 FLOW_DISSECTOR_KEY_IPV4_ADDRS,
91 struct flow_dissector_key_ipv4_addrs *mask =
92 skb_flow_dissector_target(f->dissector,
93 FLOW_DISSECTOR_KEY_IPV4_ADDRS,
96 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_IP4,
97 ntohl(key->src), ntohl(mask->src));
98 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_IP4,
99 ntohl(key->dst), ntohl(mask->dst));
102 static void mlxsw_sp_flower_parse_ipv6(struct mlxsw_sp_acl_rule_info *rulei,
103 struct tc_cls_flower_offload *f)
105 struct flow_dissector_key_ipv6_addrs *key =
106 skb_flow_dissector_target(f->dissector,
107 FLOW_DISSECTOR_KEY_IPV6_ADDRS,
109 struct flow_dissector_key_ipv6_addrs *mask =
110 skb_flow_dissector_target(f->dissector,
111 FLOW_DISSECTOR_KEY_IPV6_ADDRS,
113 size_t addr_half_size = sizeof(key->src) / 2;
115 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_HI,
116 &key->src.s6_addr[0],
117 &mask->src.s6_addr[0],
119 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_LO,
120 &key->src.s6_addr[addr_half_size],
121 &mask->src.s6_addr[addr_half_size],
123 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_HI,
124 &key->dst.s6_addr[0],
125 &mask->dst.s6_addr[0],
127 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_LO,
128 &key->dst.s6_addr[addr_half_size],
129 &mask->dst.s6_addr[addr_half_size],
133 static int mlxsw_sp_flower_parse_ports(struct mlxsw_sp *mlxsw_sp,
134 struct mlxsw_sp_acl_rule_info *rulei,
135 struct tc_cls_flower_offload *f,
138 struct flow_dissector_key_ports *key, *mask;
140 if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS))
143 if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
144 dev_err(mlxsw_sp->bus_info->dev, "Only UDP and TCP keys are supported\n");
148 key = skb_flow_dissector_target(f->dissector,
149 FLOW_DISSECTOR_KEY_PORTS,
151 mask = skb_flow_dissector_target(f->dissector,
152 FLOW_DISSECTOR_KEY_PORTS,
154 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_L4_PORT,
155 ntohs(key->dst), ntohs(mask->dst));
156 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_L4_PORT,
157 ntohs(key->src), ntohs(mask->src));
161 static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
162 struct net_device *dev,
163 struct mlxsw_sp_acl_rule_info *rulei,
164 struct tc_cls_flower_offload *f)
170 if (f->dissector->used_keys &
171 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
172 BIT(FLOW_DISSECTOR_KEY_BASIC) |
173 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
174 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
175 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
176 BIT(FLOW_DISSECTOR_KEY_PORTS))) {
177 dev_err(mlxsw_sp->bus_info->dev, "Unsupported key\n");
181 mlxsw_sp_acl_rulei_priority(rulei, f->prio);
183 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
184 struct flow_dissector_key_control *key =
185 skb_flow_dissector_target(f->dissector,
186 FLOW_DISSECTOR_KEY_CONTROL,
188 addr_type = key->addr_type;
191 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
192 struct flow_dissector_key_basic *key =
193 skb_flow_dissector_target(f->dissector,
194 FLOW_DISSECTOR_KEY_BASIC,
196 struct flow_dissector_key_basic *mask =
197 skb_flow_dissector_target(f->dissector,
198 FLOW_DISSECTOR_KEY_BASIC,
200 u16 n_proto_key = ntohs(key->n_proto);
201 u16 n_proto_mask = ntohs(mask->n_proto);
203 if (n_proto_key == ETH_P_ALL) {
207 mlxsw_sp_acl_rulei_keymask_u32(rulei,
208 MLXSW_AFK_ELEMENT_ETHERTYPE,
209 n_proto_key, n_proto_mask);
211 ip_proto = key->ip_proto;
212 mlxsw_sp_acl_rulei_keymask_u32(rulei,
213 MLXSW_AFK_ELEMENT_IP_PROTO,
214 key->ip_proto, mask->ip_proto);
217 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
218 struct flow_dissector_key_eth_addrs *key =
219 skb_flow_dissector_target(f->dissector,
220 FLOW_DISSECTOR_KEY_ETH_ADDRS,
222 struct flow_dissector_key_eth_addrs *mask =
223 skb_flow_dissector_target(f->dissector,
224 FLOW_DISSECTOR_KEY_ETH_ADDRS,
227 mlxsw_sp_acl_rulei_keymask_buf(rulei,
228 MLXSW_AFK_ELEMENT_DMAC,
231 mlxsw_sp_acl_rulei_keymask_buf(rulei,
232 MLXSW_AFK_ELEMENT_SMAC,
237 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS)
238 mlxsw_sp_flower_parse_ipv4(rulei, f);
240 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS)
241 mlxsw_sp_flower_parse_ipv6(rulei, f);
243 err = mlxsw_sp_flower_parse_ports(mlxsw_sp, rulei, f, ip_proto);
247 return mlxsw_sp_flower_parse_actions(mlxsw_sp, dev, rulei, f->exts);
250 int mlxsw_sp_flower_replace(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
251 __be16 protocol, struct tc_cls_flower_offload *f)
253 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
254 struct net_device *dev = mlxsw_sp_port->dev;
255 struct mlxsw_sp_acl_rule_info *rulei;
256 struct mlxsw_sp_acl_ruleset *ruleset;
257 struct mlxsw_sp_acl_rule *rule;
260 ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, dev, ingress,
261 MLXSW_SP_ACL_PROFILE_FLOWER);
263 return PTR_ERR(ruleset);
265 rule = mlxsw_sp_acl_rule_create(mlxsw_sp, ruleset, f->cookie);
268 goto err_rule_create;
271 rulei = mlxsw_sp_acl_rule_rulei(rule);
272 err = mlxsw_sp_flower_parse(mlxsw_sp, dev, rulei, f);
274 goto err_flower_parse;
276 err = mlxsw_sp_acl_rulei_commit(rulei);
278 goto err_rulei_commit;
280 err = mlxsw_sp_acl_rule_add(mlxsw_sp, rule);
284 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
290 mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
292 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
296 void mlxsw_sp_flower_destroy(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
297 struct tc_cls_flower_offload *f)
299 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
300 struct mlxsw_sp_acl_ruleset *ruleset;
301 struct mlxsw_sp_acl_rule *rule;
303 ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, mlxsw_sp_port->dev,
305 MLXSW_SP_ACL_PROFILE_FLOWER);
309 rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
311 mlxsw_sp_acl_rule_del(mlxsw_sp, rule);
312 mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
315 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);