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e8f887ac AV |
1 | /* |
2 | * Copyright (c) 2016, Mellanox Technologies. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
e3a2b7ed AV |
33 | #include <net/flow_dissector.h> |
34 | #include <net/pkt_cls.h> | |
35 | #include <net/tc_act/tc_gact.h> | |
12185a9f | 36 | #include <net/tc_act/tc_skbedit.h> |
e8f887ac AV |
37 | #include <linux/mlx5/fs.h> |
38 | #include <linux/mlx5/device.h> | |
39 | #include <linux/rhashtable.h> | |
40 | #include "en.h" | |
41 | #include "en_tc.h" | |
42 | ||
43 | struct mlx5e_tc_flow { | |
44 | struct rhash_head node; | |
45 | u64 cookie; | |
46 | struct mlx5_flow_rule *rule; | |
47 | }; | |
48 | ||
acff797c MG |
49 | #define MLX5E_TC_TABLE_NUM_ENTRIES 1024 |
50 | #define MLX5E_TC_TABLE_NUM_GROUPS 4 | |
e8f887ac AV |
51 | |
52 | static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv, | |
53 | u32 *match_c, u32 *match_v, | |
54 | u32 action, u32 flow_tag) | |
55 | { | |
aad7e08d AV |
56 | struct mlx5_core_dev *dev = priv->mdev; |
57 | struct mlx5_flow_destination dest = { 0 }; | |
58 | struct mlx5_fc *counter = NULL; | |
e8f887ac AV |
59 | struct mlx5_flow_rule *rule; |
60 | bool table_created = false; | |
61 | ||
aad7e08d AV |
62 | if (action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) { |
63 | dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE; | |
64 | dest.ft = priv->fs.vlan.ft.t; | |
65 | } else { | |
66 | counter = mlx5_fc_create(dev, true); | |
67 | if (IS_ERR(counter)) | |
68 | return ERR_CAST(counter); | |
69 | ||
70 | dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER; | |
71 | dest.counter = counter; | |
72 | } | |
73 | ||
acff797c MG |
74 | if (IS_ERR_OR_NULL(priv->fs.tc.t)) { |
75 | priv->fs.tc.t = | |
76 | mlx5_create_auto_grouped_flow_table(priv->fs.ns, | |
77 | MLX5E_TC_PRIO, | |
78 | MLX5E_TC_TABLE_NUM_ENTRIES, | |
79 | MLX5E_TC_TABLE_NUM_GROUPS, | |
d63cd286 | 80 | 0); |
acff797c | 81 | if (IS_ERR(priv->fs.tc.t)) { |
e8f887ac AV |
82 | netdev_err(priv->netdev, |
83 | "Failed to create tc offload table\n"); | |
aad7e08d AV |
84 | rule = ERR_CAST(priv->fs.tc.t); |
85 | goto err_create_ft; | |
e8f887ac AV |
86 | } |
87 | ||
88 | table_created = true; | |
89 | } | |
90 | ||
acff797c | 91 | rule = mlx5_add_flow_rule(priv->fs.tc.t, MLX5_MATCH_OUTER_HEADERS, |
e8f887ac AV |
92 | match_c, match_v, |
93 | action, flow_tag, | |
aad7e08d AV |
94 | &dest); |
95 | ||
96 | if (IS_ERR(rule)) | |
97 | goto err_add_rule; | |
98 | ||
99 | return rule; | |
e8f887ac | 100 | |
aad7e08d AV |
101 | err_add_rule: |
102 | if (table_created) { | |
acff797c MG |
103 | mlx5_destroy_flow_table(priv->fs.tc.t); |
104 | priv->fs.tc.t = NULL; | |
e8f887ac | 105 | } |
aad7e08d AV |
106 | err_create_ft: |
107 | mlx5_fc_destroy(dev, counter); | |
e8f887ac AV |
108 | |
109 | return rule; | |
110 | } | |
111 | ||
112 | static void mlx5e_tc_del_flow(struct mlx5e_priv *priv, | |
113 | struct mlx5_flow_rule *rule) | |
114 | { | |
aad7e08d AV |
115 | struct mlx5_fc *counter = NULL; |
116 | ||
117 | counter = mlx5_flow_rule_counter(rule); | |
118 | ||
e8f887ac AV |
119 | mlx5_del_flow_rule(rule); |
120 | ||
aad7e08d AV |
121 | mlx5_fc_destroy(priv->mdev, counter); |
122 | ||
e8f887ac | 123 | if (!mlx5e_tc_num_filters(priv)) { |
acff797c MG |
124 | mlx5_destroy_flow_table(priv->fs.tc.t); |
125 | priv->fs.tc.t = NULL; | |
e8f887ac AV |
126 | } |
127 | } | |
128 | ||
e3a2b7ed AV |
129 | static int parse_cls_flower(struct mlx5e_priv *priv, |
130 | u32 *match_c, u32 *match_v, | |
131 | struct tc_cls_flower_offload *f) | |
132 | { | |
133 | void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c, outer_headers); | |
134 | void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v, outer_headers); | |
135 | u16 addr_type = 0; | |
136 | u8 ip_proto = 0; | |
137 | ||
138 | if (f->dissector->used_keys & | |
139 | ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) | | |
140 | BIT(FLOW_DISSECTOR_KEY_BASIC) | | |
141 | BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) | | |
142 | BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | | |
143 | BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | | |
144 | BIT(FLOW_DISSECTOR_KEY_PORTS))) { | |
145 | netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n", | |
146 | f->dissector->used_keys); | |
147 | return -EOPNOTSUPP; | |
148 | } | |
149 | ||
150 | if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) { | |
151 | struct flow_dissector_key_control *key = | |
152 | skb_flow_dissector_target(f->dissector, | |
153 | FLOW_DISSECTOR_KEY_BASIC, | |
154 | f->key); | |
155 | addr_type = key->addr_type; | |
156 | } | |
157 | ||
158 | if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) { | |
159 | struct flow_dissector_key_basic *key = | |
160 | skb_flow_dissector_target(f->dissector, | |
161 | FLOW_DISSECTOR_KEY_BASIC, | |
162 | f->key); | |
163 | struct flow_dissector_key_basic *mask = | |
164 | skb_flow_dissector_target(f->dissector, | |
165 | FLOW_DISSECTOR_KEY_BASIC, | |
166 | f->mask); | |
167 | ip_proto = key->ip_proto; | |
168 | ||
169 | MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype, | |
170 | ntohs(mask->n_proto)); | |
171 | MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype, | |
172 | ntohs(key->n_proto)); | |
173 | ||
174 | MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol, | |
175 | mask->ip_proto); | |
176 | MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, | |
177 | key->ip_proto); | |
178 | } | |
179 | ||
180 | if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { | |
181 | struct flow_dissector_key_eth_addrs *key = | |
182 | skb_flow_dissector_target(f->dissector, | |
183 | FLOW_DISSECTOR_KEY_ETH_ADDRS, | |
184 | f->key); | |
185 | struct flow_dissector_key_eth_addrs *mask = | |
186 | skb_flow_dissector_target(f->dissector, | |
187 | FLOW_DISSECTOR_KEY_ETH_ADDRS, | |
188 | f->mask); | |
189 | ||
190 | ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c, | |
191 | dmac_47_16), | |
192 | mask->dst); | |
193 | ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v, | |
194 | dmac_47_16), | |
195 | key->dst); | |
196 | ||
197 | ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c, | |
198 | smac_47_16), | |
199 | mask->src); | |
200 | ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v, | |
201 | smac_47_16), | |
202 | key->src); | |
203 | } | |
204 | ||
205 | if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { | |
206 | struct flow_dissector_key_ipv4_addrs *key = | |
207 | skb_flow_dissector_target(f->dissector, | |
208 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, | |
209 | f->key); | |
210 | struct flow_dissector_key_ipv4_addrs *mask = | |
211 | skb_flow_dissector_target(f->dissector, | |
212 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, | |
213 | f->mask); | |
214 | ||
215 | memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c, | |
216 | src_ipv4_src_ipv6.ipv4_layout.ipv4), | |
217 | &mask->src, sizeof(mask->src)); | |
218 | memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v, | |
219 | src_ipv4_src_ipv6.ipv4_layout.ipv4), | |
220 | &key->src, sizeof(key->src)); | |
221 | memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c, | |
222 | dst_ipv4_dst_ipv6.ipv4_layout.ipv4), | |
223 | &mask->dst, sizeof(mask->dst)); | |
224 | memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v, | |
225 | dst_ipv4_dst_ipv6.ipv4_layout.ipv4), | |
226 | &key->dst, sizeof(key->dst)); | |
227 | } | |
228 | ||
229 | if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { | |
230 | struct flow_dissector_key_ipv6_addrs *key = | |
231 | skb_flow_dissector_target(f->dissector, | |
232 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, | |
233 | f->key); | |
234 | struct flow_dissector_key_ipv6_addrs *mask = | |
235 | skb_flow_dissector_target(f->dissector, | |
236 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, | |
237 | f->mask); | |
238 | ||
239 | memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c, | |
240 | src_ipv4_src_ipv6.ipv6_layout.ipv6), | |
241 | &mask->src, sizeof(mask->src)); | |
242 | memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v, | |
243 | src_ipv4_src_ipv6.ipv6_layout.ipv6), | |
244 | &key->src, sizeof(key->src)); | |
245 | ||
246 | memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c, | |
247 | dst_ipv4_dst_ipv6.ipv6_layout.ipv6), | |
248 | &mask->dst, sizeof(mask->dst)); | |
249 | memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v, | |
250 | dst_ipv4_dst_ipv6.ipv6_layout.ipv6), | |
251 | &key->dst, sizeof(key->dst)); | |
252 | } | |
253 | ||
254 | if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) { | |
255 | struct flow_dissector_key_ports *key = | |
256 | skb_flow_dissector_target(f->dissector, | |
257 | FLOW_DISSECTOR_KEY_PORTS, | |
258 | f->key); | |
259 | struct flow_dissector_key_ports *mask = | |
260 | skb_flow_dissector_target(f->dissector, | |
261 | FLOW_DISSECTOR_KEY_PORTS, | |
262 | f->mask); | |
263 | switch (ip_proto) { | |
264 | case IPPROTO_TCP: | |
265 | MLX5_SET(fte_match_set_lyr_2_4, headers_c, | |
266 | tcp_sport, ntohs(mask->src)); | |
267 | MLX5_SET(fte_match_set_lyr_2_4, headers_v, | |
268 | tcp_sport, ntohs(key->src)); | |
269 | ||
270 | MLX5_SET(fte_match_set_lyr_2_4, headers_c, | |
271 | tcp_dport, ntohs(mask->dst)); | |
272 | MLX5_SET(fte_match_set_lyr_2_4, headers_v, | |
273 | tcp_dport, ntohs(key->dst)); | |
274 | break; | |
275 | ||
276 | case IPPROTO_UDP: | |
277 | MLX5_SET(fte_match_set_lyr_2_4, headers_c, | |
278 | udp_sport, ntohs(mask->src)); | |
279 | MLX5_SET(fte_match_set_lyr_2_4, headers_v, | |
280 | udp_sport, ntohs(key->src)); | |
281 | ||
282 | MLX5_SET(fte_match_set_lyr_2_4, headers_c, | |
283 | udp_dport, ntohs(mask->dst)); | |
284 | MLX5_SET(fte_match_set_lyr_2_4, headers_v, | |
285 | udp_dport, ntohs(key->dst)); | |
286 | break; | |
287 | default: | |
288 | netdev_err(priv->netdev, | |
289 | "Only UDP and TCP transport are supported\n"); | |
290 | return -EINVAL; | |
291 | } | |
292 | } | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | static int parse_tc_actions(struct mlx5e_priv *priv, struct tcf_exts *exts, | |
298 | u32 *action, u32 *flow_tag) | |
299 | { | |
300 | const struct tc_action *a; | |
301 | ||
302 | if (tc_no_actions(exts)) | |
303 | return -EINVAL; | |
304 | ||
305 | *flow_tag = MLX5_FS_DEFAULT_FLOW_TAG; | |
306 | *action = 0; | |
307 | ||
308 | tc_for_each_action(a, exts) { | |
309 | /* Only support a single action per rule */ | |
310 | if (*action) | |
311 | return -EINVAL; | |
312 | ||
313 | if (is_tcf_gact_shot(a)) { | |
314 | *action |= MLX5_FLOW_CONTEXT_ACTION_DROP; | |
aad7e08d AV |
315 | if (MLX5_CAP_FLOWTABLE(priv->mdev, |
316 | flow_table_properties_nic_receive.flow_counter)) | |
317 | *action |= MLX5_FLOW_CONTEXT_ACTION_COUNT; | |
e3a2b7ed AV |
318 | continue; |
319 | } | |
320 | ||
321 | if (is_tcf_skbedit_mark(a)) { | |
322 | u32 mark = tcf_skbedit_mark(a); | |
323 | ||
324 | if (mark & ~MLX5E_TC_FLOW_ID_MASK) { | |
325 | netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n", | |
326 | mark); | |
327 | return -EINVAL; | |
328 | } | |
329 | ||
330 | *flow_tag = mark; | |
331 | *action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST; | |
332 | continue; | |
333 | } | |
334 | ||
335 | return -EINVAL; | |
336 | } | |
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
341 | int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol, | |
342 | struct tc_cls_flower_offload *f) | |
343 | { | |
acff797c | 344 | struct mlx5e_tc_table *tc = &priv->fs.tc; |
e3a2b7ed AV |
345 | u32 *match_c; |
346 | u32 *match_v; | |
347 | int err = 0; | |
348 | u32 flow_tag; | |
349 | u32 action; | |
350 | struct mlx5e_tc_flow *flow; | |
351 | struct mlx5_flow_rule *old = NULL; | |
352 | ||
353 | flow = rhashtable_lookup_fast(&tc->ht, &f->cookie, | |
354 | tc->ht_params); | |
355 | if (flow) | |
356 | old = flow->rule; | |
357 | else | |
358 | flow = kzalloc(sizeof(*flow), GFP_KERNEL); | |
359 | ||
360 | match_c = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL); | |
361 | match_v = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL); | |
362 | if (!match_c || !match_v || !flow) { | |
363 | err = -ENOMEM; | |
364 | goto err_free; | |
365 | } | |
366 | ||
367 | flow->cookie = f->cookie; | |
368 | ||
369 | err = parse_cls_flower(priv, match_c, match_v, f); | |
370 | if (err < 0) | |
371 | goto err_free; | |
372 | ||
373 | err = parse_tc_actions(priv, f->exts, &action, &flow_tag); | |
374 | if (err < 0) | |
375 | goto err_free; | |
376 | ||
377 | err = rhashtable_insert_fast(&tc->ht, &flow->node, | |
378 | tc->ht_params); | |
379 | if (err) | |
380 | goto err_free; | |
381 | ||
382 | flow->rule = mlx5e_tc_add_flow(priv, match_c, match_v, action, | |
383 | flow_tag); | |
384 | if (IS_ERR(flow->rule)) { | |
385 | err = PTR_ERR(flow->rule); | |
386 | goto err_hash_del; | |
387 | } | |
388 | ||
389 | if (old) | |
390 | mlx5e_tc_del_flow(priv, old); | |
391 | ||
392 | goto out; | |
393 | ||
394 | err_hash_del: | |
395 | rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params); | |
396 | ||
397 | err_free: | |
398 | if (!old) | |
399 | kfree(flow); | |
400 | out: | |
401 | kfree(match_c); | |
402 | kfree(match_v); | |
403 | return err; | |
404 | } | |
405 | ||
406 | int mlx5e_delete_flower(struct mlx5e_priv *priv, | |
407 | struct tc_cls_flower_offload *f) | |
408 | { | |
409 | struct mlx5e_tc_flow *flow; | |
acff797c | 410 | struct mlx5e_tc_table *tc = &priv->fs.tc; |
e3a2b7ed AV |
411 | |
412 | flow = rhashtable_lookup_fast(&tc->ht, &f->cookie, | |
413 | tc->ht_params); | |
414 | if (!flow) | |
415 | return -EINVAL; | |
416 | ||
417 | rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params); | |
418 | ||
419 | mlx5e_tc_del_flow(priv, flow->rule); | |
420 | ||
421 | kfree(flow); | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
aad7e08d AV |
426 | int mlx5e_stats_flower(struct mlx5e_priv *priv, |
427 | struct tc_cls_flower_offload *f) | |
428 | { | |
429 | struct mlx5e_tc_table *tc = &priv->fs.tc; | |
430 | struct mlx5e_tc_flow *flow; | |
431 | struct tc_action *a; | |
432 | struct mlx5_fc *counter; | |
433 | u64 bytes; | |
434 | u64 packets; | |
435 | u64 lastuse; | |
436 | ||
437 | flow = rhashtable_lookup_fast(&tc->ht, &f->cookie, | |
438 | tc->ht_params); | |
439 | if (!flow) | |
440 | return -EINVAL; | |
441 | ||
442 | counter = mlx5_flow_rule_counter(flow->rule); | |
443 | if (!counter) | |
444 | return 0; | |
445 | ||
446 | mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse); | |
447 | ||
448 | tc_for_each_action(a, f->exts) | |
449 | tcf_action_stats_update(a, bytes, packets, lastuse); | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
e8f887ac AV |
454 | static const struct rhashtable_params mlx5e_tc_flow_ht_params = { |
455 | .head_offset = offsetof(struct mlx5e_tc_flow, node), | |
456 | .key_offset = offsetof(struct mlx5e_tc_flow, cookie), | |
457 | .key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie), | |
458 | .automatic_shrinking = true, | |
459 | }; | |
460 | ||
461 | int mlx5e_tc_init(struct mlx5e_priv *priv) | |
462 | { | |
acff797c | 463 | struct mlx5e_tc_table *tc = &priv->fs.tc; |
e8f887ac AV |
464 | |
465 | tc->ht_params = mlx5e_tc_flow_ht_params; | |
466 | return rhashtable_init(&tc->ht, &tc->ht_params); | |
467 | } | |
468 | ||
469 | static void _mlx5e_tc_del_flow(void *ptr, void *arg) | |
470 | { | |
471 | struct mlx5e_tc_flow *flow = ptr; | |
472 | struct mlx5e_priv *priv = arg; | |
473 | ||
474 | mlx5e_tc_del_flow(priv, flow->rule); | |
475 | kfree(flow); | |
476 | } | |
477 | ||
478 | void mlx5e_tc_cleanup(struct mlx5e_priv *priv) | |
479 | { | |
acff797c | 480 | struct mlx5e_tc_table *tc = &priv->fs.tc; |
e8f887ac AV |
481 | |
482 | rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv); | |
483 | ||
acff797c MG |
484 | if (!IS_ERR_OR_NULL(tc->t)) { |
485 | mlx5_destroy_flow_table(tc->t); | |
486 | tc->t = NULL; | |
e8f887ac AV |
487 | } |
488 | } |