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33#include <net/flow_dissector.h>
34#include <net/pkt_cls.h>
35#include <net/tc_act/tc_gact.h>
36#include <net/tc_act/tc_skbedit.h>
37#include <linux/mlx5/fs.h>
38#include <linux/mlx5/device.h>
39#include <linux/rhashtable.h>
40#include <net/switchdev.h>
41#include <net/tc_act/tc_mirred.h>
42#include "en.h"
43#include "en_tc.h"
44#include "eswitch.h"
45
46struct mlx5e_tc_flow {
47 struct rhash_head node;
48 u64 cookie;
49 struct mlx5_flow_rule *rule;
50};
51
52#define MLX5E_TC_TABLE_NUM_ENTRIES 1024
53#define MLX5E_TC_TABLE_NUM_GROUPS 4
54
55static struct mlx5_flow_rule *mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
56 struct mlx5_flow_spec *spec,
57 u32 action, u32 flow_tag)
58{
59 struct mlx5_core_dev *dev = priv->mdev;
60 struct mlx5_flow_destination dest = { 0 };
61 struct mlx5_fc *counter = NULL;
62 struct mlx5_flow_rule *rule;
63 bool table_created = false;
64
65 if (action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
66 dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
67 dest.ft = priv->fs.vlan.ft.t;
68 } else if (action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
69 counter = mlx5_fc_create(dev, true);
70 if (IS_ERR(counter))
71 return ERR_CAST(counter);
72
73 dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
74 dest.counter = counter;
75 }
76
77 if (IS_ERR_OR_NULL(priv->fs.tc.t)) {
78 priv->fs.tc.t =
79 mlx5_create_auto_grouped_flow_table(priv->fs.ns,
80 MLX5E_TC_PRIO,
81 MLX5E_TC_TABLE_NUM_ENTRIES,
82 MLX5E_TC_TABLE_NUM_GROUPS,
83 0);
84 if (IS_ERR(priv->fs.tc.t)) {
85 netdev_err(priv->netdev,
86 "Failed to create tc offload table\n");
87 rule = ERR_CAST(priv->fs.tc.t);
88 goto err_create_ft;
89 }
90
91 table_created = true;
92 }
93
94 spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
95 rule = mlx5_add_flow_rule(priv->fs.tc.t, spec,
96 action, flow_tag,
97 &dest);
98
99 if (IS_ERR(rule))
100 goto err_add_rule;
101
102 return rule;
103
104err_add_rule:
105 if (table_created) {
106 mlx5_destroy_flow_table(priv->fs.tc.t);
107 priv->fs.tc.t = NULL;
108 }
109err_create_ft:
110 mlx5_fc_destroy(dev, counter);
111
112 return rule;
113}
114
115static struct mlx5_flow_rule *mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
116 struct mlx5_flow_spec *spec,
117 u32 action, u32 dst_vport)
118{
119 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
120 struct mlx5_eswitch_rep *rep = priv->ppriv;
121 u32 src_vport;
122
123 if (rep->vport)
124 src_vport = rep->vport;
125 else
126 src_vport = FDB_UPLINK_VPORT;
127
128 return mlx5_eswitch_add_offloaded_rule(esw, spec, action, src_vport, dst_vport);
129}
130
131static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
132 struct mlx5_flow_rule *rule)
133{
134 struct mlx5_fc *counter = NULL;
135
136 counter = mlx5_flow_rule_counter(rule);
137
138 mlx5_del_flow_rule(rule);
139
140 mlx5_fc_destroy(priv->mdev, counter);
141
142 if (!mlx5e_tc_num_filters(priv) && (priv->fs.tc.t)) {
143 mlx5_destroy_flow_table(priv->fs.tc.t);
144 priv->fs.tc.t = NULL;
145 }
146}
147
148static int parse_cls_flower(struct mlx5e_priv *priv, struct mlx5_flow_spec *spec,
149 struct tc_cls_flower_offload *f)
150{
151 void *headers_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
152 outer_headers);
153 void *headers_v = MLX5_ADDR_OF(fte_match_param, spec->match_value,
154 outer_headers);
155 u16 addr_type = 0;
156 u8 ip_proto = 0;
157
158 if (f->dissector->used_keys &
159 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
160 BIT(FLOW_DISSECTOR_KEY_BASIC) |
161 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
162 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
163 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
164 BIT(FLOW_DISSECTOR_KEY_PORTS))) {
165 netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
166 f->dissector->used_keys);
167 return -EOPNOTSUPP;
168 }
169
170 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
171 struct flow_dissector_key_control *key =
172 skb_flow_dissector_target(f->dissector,
173 FLOW_DISSECTOR_KEY_CONTROL,
174 f->key);
175 addr_type = key->addr_type;
176 }
177
178 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
179 struct flow_dissector_key_basic *key =
180 skb_flow_dissector_target(f->dissector,
181 FLOW_DISSECTOR_KEY_BASIC,
182 f->key);
183 struct flow_dissector_key_basic *mask =
184 skb_flow_dissector_target(f->dissector,
185 FLOW_DISSECTOR_KEY_BASIC,
186 f->mask);
187 ip_proto = key->ip_proto;
188
189 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
190 ntohs(mask->n_proto));
191 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
192 ntohs(key->n_proto));
193
194 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
195 mask->ip_proto);
196 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
197 key->ip_proto);
198 }
199
200 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
201 struct flow_dissector_key_eth_addrs *key =
202 skb_flow_dissector_target(f->dissector,
203 FLOW_DISSECTOR_KEY_ETH_ADDRS,
204 f->key);
205 struct flow_dissector_key_eth_addrs *mask =
206 skb_flow_dissector_target(f->dissector,
207 FLOW_DISSECTOR_KEY_ETH_ADDRS,
208 f->mask);
209
210 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
211 dmac_47_16),
212 mask->dst);
213 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
214 dmac_47_16),
215 key->dst);
216
217 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
218 smac_47_16),
219 mask->src);
220 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
221 smac_47_16),
222 key->src);
223 }
224
225 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
226 struct flow_dissector_key_ipv4_addrs *key =
227 skb_flow_dissector_target(f->dissector,
228 FLOW_DISSECTOR_KEY_IPV4_ADDRS,
229 f->key);
230 struct flow_dissector_key_ipv4_addrs *mask =
231 skb_flow_dissector_target(f->dissector,
232 FLOW_DISSECTOR_KEY_IPV4_ADDRS,
233 f->mask);
234
235 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
236 src_ipv4_src_ipv6.ipv4_layout.ipv4),
237 &mask->src, sizeof(mask->src));
238 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
239 src_ipv4_src_ipv6.ipv4_layout.ipv4),
240 &key->src, sizeof(key->src));
241 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
242 dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
243 &mask->dst, sizeof(mask->dst));
244 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
245 dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
246 &key->dst, sizeof(key->dst));
247 }
248
249 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
250 struct flow_dissector_key_ipv6_addrs *key =
251 skb_flow_dissector_target(f->dissector,
252 FLOW_DISSECTOR_KEY_IPV6_ADDRS,
253 f->key);
254 struct flow_dissector_key_ipv6_addrs *mask =
255 skb_flow_dissector_target(f->dissector,
256 FLOW_DISSECTOR_KEY_IPV6_ADDRS,
257 f->mask);
258
259 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
260 src_ipv4_src_ipv6.ipv6_layout.ipv6),
261 &mask->src, sizeof(mask->src));
262 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
263 src_ipv4_src_ipv6.ipv6_layout.ipv6),
264 &key->src, sizeof(key->src));
265
266 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
267 dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
268 &mask->dst, sizeof(mask->dst));
269 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
270 dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
271 &key->dst, sizeof(key->dst));
272 }
273
274 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
275 struct flow_dissector_key_ports *key =
276 skb_flow_dissector_target(f->dissector,
277 FLOW_DISSECTOR_KEY_PORTS,
278 f->key);
279 struct flow_dissector_key_ports *mask =
280 skb_flow_dissector_target(f->dissector,
281 FLOW_DISSECTOR_KEY_PORTS,
282 f->mask);
283 switch (ip_proto) {
284 case IPPROTO_TCP:
285 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
286 tcp_sport, ntohs(mask->src));
287 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
288 tcp_sport, ntohs(key->src));
289
290 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
291 tcp_dport, ntohs(mask->dst));
292 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
293 tcp_dport, ntohs(key->dst));
294 break;
295
296 case IPPROTO_UDP:
297 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
298 udp_sport, ntohs(mask->src));
299 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
300 udp_sport, ntohs(key->src));
301
302 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
303 udp_dport, ntohs(mask->dst));
304 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
305 udp_dport, ntohs(key->dst));
306 break;
307 default:
308 netdev_err(priv->netdev,
309 "Only UDP and TCP transport are supported\n");
310 return -EINVAL;
311 }
312 }
313
314 return 0;
315}
316
317static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
318 u32 *action, u32 *flow_tag)
319{
320 const struct tc_action *a;
321 LIST_HEAD(actions);
322
323 if (tc_no_actions(exts))
324 return -EINVAL;
325
326 *flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
327 *action = 0;
328
329 tcf_exts_to_list(exts, &actions);
330 list_for_each_entry(a, &actions, list) {
331
332 if (*action)
333 return -EINVAL;
334
335 if (is_tcf_gact_shot(a)) {
336 *action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
337 if (MLX5_CAP_FLOWTABLE(priv->mdev,
338 flow_table_properties_nic_receive.flow_counter))
339 *action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
340 continue;
341 }
342
343 if (is_tcf_skbedit_mark(a)) {
344 u32 mark = tcf_skbedit_mark(a);
345
346 if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
347 netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
348 mark);
349 return -EINVAL;
350 }
351
352 *flow_tag = mark;
353 *action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
354 continue;
355 }
356
357 return -EINVAL;
358 }
359
360 return 0;
361}
362
363static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
364 u32 *action, u32 *dest_vport)
365{
366 const struct tc_action *a;
367 LIST_HEAD(actions);
368
369 if (tc_no_actions(exts))
370 return -EINVAL;
371
372 *action = 0;
373
374 tcf_exts_to_list(exts, &actions);
375 list_for_each_entry(a, &actions, list) {
376
377 if (*action)
378 return -EINVAL;
379
380 if (is_tcf_gact_shot(a)) {
381 *action = MLX5_FLOW_CONTEXT_ACTION_DROP |
382 MLX5_FLOW_CONTEXT_ACTION_COUNT;
383 continue;
384 }
385
386 if (is_tcf_mirred_redirect(a)) {
387 int ifindex = tcf_mirred_ifindex(a);
388 struct net_device *out_dev;
389 struct mlx5e_priv *out_priv;
390 struct mlx5_eswitch_rep *out_rep;
391
392 out_dev = __dev_get_by_index(dev_net(priv->netdev), ifindex);
393
394 if (!switchdev_port_same_parent_id(priv->netdev, out_dev)) {
395 pr_err("devices %s %s not on same switch HW, can't offload forwarding\n",
396 priv->netdev->name, out_dev->name);
397 return -EINVAL;
398 }
399
400 out_priv = netdev_priv(out_dev);
401 out_rep = out_priv->ppriv;
402 if (out_rep->vport == 0)
403 *dest_vport = FDB_UPLINK_VPORT;
404 else
405 *dest_vport = out_rep->vport;
406 *action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
407 continue;
408 }
409
410 return -EINVAL;
411 }
412 return 0;
413}
414
415int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
416 struct tc_cls_flower_offload *f)
417{
418 struct mlx5e_tc_table *tc = &priv->fs.tc;
419 int err = 0;
420 u32 flow_tag, action, dest_vport = 0;
421 struct mlx5e_tc_flow *flow;
422 struct mlx5_flow_spec *spec;
423 struct mlx5_flow_rule *old = NULL;
424 struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
425
426 flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
427 tc->ht_params);
428 if (flow)
429 old = flow->rule;
430 else
431 flow = kzalloc(sizeof(*flow), GFP_KERNEL);
432
433 spec = mlx5_vzalloc(sizeof(*spec));
434 if (!spec || !flow) {
435 err = -ENOMEM;
436 goto err_free;
437 }
438
439 flow->cookie = f->cookie;
440
441 err = parse_cls_flower(priv, spec, f);
442 if (err < 0)
443 goto err_free;
444
445 if (esw && esw->mode == SRIOV_OFFLOADS) {
446 err = parse_tc_fdb_actions(priv, f->exts, &action, &dest_vport);
447 if (err < 0)
448 goto err_free;
449 flow->rule = mlx5e_tc_add_fdb_flow(priv, spec, action, dest_vport);
450 } else {
451 err = parse_tc_nic_actions(priv, f->exts, &action, &flow_tag);
452 if (err < 0)
453 goto err_free;
454 flow->rule = mlx5e_tc_add_nic_flow(priv, spec, action, flow_tag);
455 }
456
457 if (IS_ERR(flow->rule)) {
458 err = PTR_ERR(flow->rule);
459 goto err_free;
460 }
461
462 err = rhashtable_insert_fast(&tc->ht, &flow->node,
463 tc->ht_params);
464 if (err)
465 goto err_del_rule;
466
467 if (old)
468 mlx5e_tc_del_flow(priv, old);
469
470 goto out;
471
472err_del_rule:
473 mlx5_del_flow_rule(flow->rule);
474
475err_free:
476 if (!old)
477 kfree(flow);
478out:
479 kvfree(spec);
480 return err;
481}
482
483int mlx5e_delete_flower(struct mlx5e_priv *priv,
484 struct tc_cls_flower_offload *f)
485{
486 struct mlx5e_tc_flow *flow;
487 struct mlx5e_tc_table *tc = &priv->fs.tc;
488
489 flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
490 tc->ht_params);
491 if (!flow)
492 return -EINVAL;
493
494 rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
495
496 mlx5e_tc_del_flow(priv, flow->rule);
497
498 kfree(flow);
499
500 return 0;
501}
502
503int mlx5e_stats_flower(struct mlx5e_priv *priv,
504 struct tc_cls_flower_offload *f)
505{
506 struct mlx5e_tc_table *tc = &priv->fs.tc;
507 struct mlx5e_tc_flow *flow;
508 struct tc_action *a;
509 struct mlx5_fc *counter;
510 LIST_HEAD(actions);
511 u64 bytes;
512 u64 packets;
513 u64 lastuse;
514
515 flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
516 tc->ht_params);
517 if (!flow)
518 return -EINVAL;
519
520 counter = mlx5_flow_rule_counter(flow->rule);
521 if (!counter)
522 return 0;
523
524 mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
525
526 tcf_exts_to_list(f->exts, &actions);
527 list_for_each_entry(a, &actions, list)
528 tcf_action_stats_update(a, bytes, packets, lastuse);
529
530 return 0;
531}
532
533static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
534 .head_offset = offsetof(struct mlx5e_tc_flow, node),
535 .key_offset = offsetof(struct mlx5e_tc_flow, cookie),
536 .key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
537 .automatic_shrinking = true,
538};
539
540int mlx5e_tc_init(struct mlx5e_priv *priv)
541{
542 struct mlx5e_tc_table *tc = &priv->fs.tc;
543
544 tc->ht_params = mlx5e_tc_flow_ht_params;
545 return rhashtable_init(&tc->ht, &tc->ht_params);
546}
547
548static void _mlx5e_tc_del_flow(void *ptr, void *arg)
549{
550 struct mlx5e_tc_flow *flow = ptr;
551 struct mlx5e_priv *priv = arg;
552
553 mlx5e_tc_del_flow(priv, flow->rule);
554 kfree(flow);
555}
556
557void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
558{
559 struct mlx5e_tc_table *tc = &priv->fs.tc;
560
561 rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);
562
563 if (!IS_ERR_OR_NULL(tc->t)) {
564 mlx5_destroy_flow_table(tc->t);
565 tc->t = NULL;
566 }
567}
568
