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33#include <linux/hash.h>
34#include <linux/mlx5/fs.h>
35#include <linux/ip.h>
36#include <linux/ipv6.h>
37#include "en.h"
38
39struct arfs_tuple {
40 __be16 etype;
41 u8 ip_proto;
42 union {
43 __be32 src_ipv4;
44 struct in6_addr src_ipv6;
45 };
46 union {
47 __be32 dst_ipv4;
48 struct in6_addr dst_ipv6;
49 };
50 __be16 src_port;
51 __be16 dst_port;
52};
53
54struct arfs_rule {
55 struct mlx5e_priv *priv;
56 struct work_struct arfs_work;
57 struct mlx5_flow_handle *rule;
58 struct hlist_node hlist;
59 int rxq;
60
61 int flow_id;
62
63 int filter_id;
64 struct arfs_tuple tuple;
65};
66
67#define mlx5e_for_each_arfs_rule(hn, tmp, arfs_tables, i, j) \
68 for (i = 0; i < ARFS_NUM_TYPES; i++) \
69 mlx5e_for_each_hash_arfs_rule(hn, tmp, arfs_tables[i].rules_hash, j)
70
71#define mlx5e_for_each_hash_arfs_rule(hn, tmp, hash, j) \
72 for (j = 0; j < ARFS_HASH_SIZE; j++) \
73 hlist_for_each_entry_safe(hn, tmp, &hash[j], hlist)
74
75static enum mlx5e_traffic_types arfs_get_tt(enum arfs_type type)
76{
77 switch (type) {
78 case ARFS_IPV4_TCP:
79 return MLX5E_TT_IPV4_TCP;
80 case ARFS_IPV4_UDP:
81 return MLX5E_TT_IPV4_UDP;
82 case ARFS_IPV6_TCP:
83 return MLX5E_TT_IPV6_TCP;
84 case ARFS_IPV6_UDP:
85 return MLX5E_TT_IPV6_UDP;
86 default:
87 return -EINVAL;
88 }
89}
90
91static int arfs_disable(struct mlx5e_priv *priv)
92{
93 struct mlx5_flow_destination dest = {};
94 struct mlx5e_tir *tir = priv->indir_tir;
95 int err = 0;
96 int tt;
97 int i;
98
99 dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
100 for (i = 0; i < ARFS_NUM_TYPES; i++) {
101 dest.tir_num = tir[i].tirn;
102 tt = arfs_get_tt(i);
103
104 err = mlx5_modify_rule_destination(priv->fs.ttc.rules[tt],
105 &dest, NULL);
106 if (err) {
107 netdev_err(priv->netdev,
108 "%s: modify ttc destination failed\n",
109 __func__);
110 return err;
111 }
112 }
113 return 0;
114}
115
116static void arfs_del_rules(struct mlx5e_priv *priv);
117
118int mlx5e_arfs_disable(struct mlx5e_priv *priv)
119{
120 arfs_del_rules(priv);
121
122 return arfs_disable(priv);
123}
124
125int mlx5e_arfs_enable(struct mlx5e_priv *priv)
126{
127 struct mlx5_flow_destination dest = {};
128 int err = 0;
129 int tt;
130 int i;
131
132 dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
133 for (i = 0; i < ARFS_NUM_TYPES; i++) {
134 dest.ft = priv->fs.arfs.arfs_tables[i].ft.t;
135 tt = arfs_get_tt(i);
136
137 err = mlx5_modify_rule_destination(priv->fs.ttc.rules[tt],
138 &dest, NULL);
139 if (err) {
140 netdev_err(priv->netdev,
141 "%s: modify ttc destination failed err=%d\n",
142 __func__, err);
143 arfs_disable(priv);
144 return err;
145 }
146 }
147 return 0;
148}
149
150static void arfs_destroy_table(struct arfs_table *arfs_t)
151{
152 mlx5_del_flow_rules(arfs_t->default_rule);
153 mlx5e_destroy_flow_table(&arfs_t->ft);
154}
155
156void mlx5e_arfs_destroy_tables(struct mlx5e_priv *priv)
157{
158 int i;
159
160 if (!(priv->netdev->hw_features & NETIF_F_NTUPLE))
161 return;
162
163 arfs_del_rules(priv);
164 destroy_workqueue(priv->fs.arfs.wq);
165 for (i = 0; i < ARFS_NUM_TYPES; i++) {
166 if (!IS_ERR_OR_NULL(priv->fs.arfs.arfs_tables[i].ft.t))
167 arfs_destroy_table(&priv->fs.arfs.arfs_tables[i]);
168 }
169}
170
171static int arfs_add_default_rule(struct mlx5e_priv *priv,
172 enum arfs_type type)
173{
174 struct arfs_table *arfs_t = &priv->fs.arfs.arfs_tables[type];
175 struct mlx5e_tir *tir = priv->indir_tir;
176 struct mlx5_flow_destination dest = {};
177 MLX5_DECLARE_FLOW_ACT(flow_act);
178 struct mlx5_flow_spec *spec;
179 enum mlx5e_traffic_types tt;
180 int err = 0;
181
182 spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
183 if (!spec) {
184 err = -ENOMEM;
185 goto out;
186 }
187
188 dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
189 tt = arfs_get_tt(type);
190 if (tt == -EINVAL) {
191 netdev_err(priv->netdev, "%s: bad arfs_type: %d\n",
192 __func__, type);
193 err = -EINVAL;
194 goto out;
195 }
196
197 dest.tir_num = tir[tt].tirn;
198
199 arfs_t->default_rule = mlx5_add_flow_rules(arfs_t->ft.t, spec,
200 &flow_act,
201 &dest, 1);
202 if (IS_ERR(arfs_t->default_rule)) {
203 err = PTR_ERR(arfs_t->default_rule);
204 arfs_t->default_rule = NULL;
205 netdev_err(priv->netdev, "%s: add rule failed, arfs type=%d\n",
206 __func__, type);
207 }
208out:
209 kvfree(spec);
210 return err;
211}
212
213#define MLX5E_ARFS_NUM_GROUPS 2
214#define MLX5E_ARFS_GROUP1_SIZE (BIT(16) - 1)
215#define MLX5E_ARFS_GROUP2_SIZE BIT(0)
216#define MLX5E_ARFS_TABLE_SIZE (MLX5E_ARFS_GROUP1_SIZE +\
217 MLX5E_ARFS_GROUP2_SIZE)
218static int arfs_create_groups(struct mlx5e_flow_table *ft,
219 enum arfs_type type)
220{
221 int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
222 void *outer_headers_c;
223 int ix = 0;
224 u32 *in;
225 int err;
226 u8 *mc;
227
228 ft->g = kcalloc(MLX5E_ARFS_NUM_GROUPS,
229 sizeof(*ft->g), GFP_KERNEL);
230 in = kvzalloc(inlen, GFP_KERNEL);
231 if (!in || !ft->g) {
232 kvfree(ft->g);
233 kvfree(in);
234 return -ENOMEM;
235 }
236
237 mc = MLX5_ADDR_OF(create_flow_group_in, in, match_criteria);
238 outer_headers_c = MLX5_ADDR_OF(fte_match_param, mc,
239 outer_headers);
240 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, ethertype);
241 switch (type) {
242 case ARFS_IPV4_TCP:
243 case ARFS_IPV6_TCP:
244 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, tcp_dport);
245 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, tcp_sport);
246 break;
247 case ARFS_IPV4_UDP:
248 case ARFS_IPV6_UDP:
249 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, udp_dport);
250 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, udp_sport);
251 break;
252 default:
253 err = -EINVAL;
254 goto out;
255 }
256
257 switch (type) {
258 case ARFS_IPV4_TCP:
259 case ARFS_IPV4_UDP:
260 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c,
261 src_ipv4_src_ipv6.ipv4_layout.ipv4);
262 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c,
263 dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
264 break;
265 case ARFS_IPV6_TCP:
266 case ARFS_IPV6_UDP:
267 memset(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_c,
268 src_ipv4_src_ipv6.ipv6_layout.ipv6),
269 0xff, 16);
270 memset(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_c,
271 dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
272 0xff, 16);
273 break;
274 default:
275 err = -EINVAL;
276 goto out;
277 }
278
279 MLX5_SET_CFG(in, match_criteria_enable, MLX5_MATCH_OUTER_HEADERS);
280 MLX5_SET_CFG(in, start_flow_index, ix);
281 ix += MLX5E_ARFS_GROUP1_SIZE;
282 MLX5_SET_CFG(in, end_flow_index, ix - 1);
283 ft->g[ft->num_groups] = mlx5_create_flow_group(ft->t, in);
284 if (IS_ERR(ft->g[ft->num_groups]))
285 goto err;
286 ft->num_groups++;
287
288 memset(in, 0, inlen);
289 MLX5_SET_CFG(in, start_flow_index, ix);
290 ix += MLX5E_ARFS_GROUP2_SIZE;
291 MLX5_SET_CFG(in, end_flow_index, ix - 1);
292 ft->g[ft->num_groups] = mlx5_create_flow_group(ft->t, in);
293 if (IS_ERR(ft->g[ft->num_groups]))
294 goto err;
295 ft->num_groups++;
296
297 kvfree(in);
298 return 0;
299
300err:
301 err = PTR_ERR(ft->g[ft->num_groups]);
302 ft->g[ft->num_groups] = NULL;
303out:
304 kvfree(in);
305
306 return err;
307}
308
309static int arfs_create_table(struct mlx5e_priv *priv,
310 enum arfs_type type)
311{
312 struct mlx5e_arfs_tables *arfs = &priv->fs.arfs;
313 struct mlx5e_flow_table *ft = &arfs->arfs_tables[type].ft;
314 struct mlx5_flow_table_attr ft_attr = {};
315 int err;
316
317 ft->num_groups = 0;
318
319 ft_attr.max_fte = MLX5E_ARFS_TABLE_SIZE;
320 ft_attr.level = MLX5E_ARFS_FT_LEVEL;
321 ft_attr.prio = MLX5E_NIC_PRIO;
322
323 ft->t = mlx5_create_flow_table(priv->fs.ns, &ft_attr);
324 if (IS_ERR(ft->t)) {
325 err = PTR_ERR(ft->t);
326 ft->t = NULL;
327 return err;
328 }
329
330 err = arfs_create_groups(ft, type);
331 if (err)
332 goto err;
333
334 err = arfs_add_default_rule(priv, type);
335 if (err)
336 goto err;
337
338 return 0;
339err:
340 mlx5e_destroy_flow_table(ft);
341 return err;
342}
343
344int mlx5e_arfs_create_tables(struct mlx5e_priv *priv)
345{
346 int err = 0;
347 int i;
348
349 if (!(priv->netdev->hw_features & NETIF_F_NTUPLE))
350 return 0;
351
352 spin_lock_init(&priv->fs.arfs.arfs_lock);
353 INIT_LIST_HEAD(&priv->fs.arfs.rules);
354 priv->fs.arfs.wq = create_singlethread_workqueue("mlx5e_arfs");
355 if (!priv->fs.arfs.wq)
356 return -ENOMEM;
357
358 for (i = 0; i < ARFS_NUM_TYPES; i++) {
359 err = arfs_create_table(priv, i);
360 if (err)
361 goto err;
362 }
363 return 0;
364err:
365 mlx5e_arfs_destroy_tables(priv);
366 return err;
367}
368
369#define MLX5E_ARFS_EXPIRY_QUOTA 60
370
371static void arfs_may_expire_flow(struct mlx5e_priv *priv)
372{
373 struct arfs_rule *arfs_rule;
374 struct hlist_node *htmp;
375 int quota = 0;
376 int i;
377 int j;
378
379 HLIST_HEAD(del_list);
380 spin_lock_bh(&priv->fs.arfs.arfs_lock);
381 mlx5e_for_each_arfs_rule(arfs_rule, htmp, priv->fs.arfs.arfs_tables, i, j) {
382 if (!work_pending(&arfs_rule->arfs_work) &&
383 rps_may_expire_flow(priv->netdev,
384 arfs_rule->rxq, arfs_rule->flow_id,
385 arfs_rule->filter_id)) {
386 hlist_del_init(&arfs_rule->hlist);
387 hlist_add_head(&arfs_rule->hlist, &del_list);
388 if (quota++ > MLX5E_ARFS_EXPIRY_QUOTA)
389 break;
390 }
391 }
392 spin_unlock_bh(&priv->fs.arfs.arfs_lock);
393 hlist_for_each_entry_safe(arfs_rule, htmp, &del_list, hlist) {
394 if (arfs_rule->rule)
395 mlx5_del_flow_rules(arfs_rule->rule);
396 hlist_del(&arfs_rule->hlist);
397 kfree(arfs_rule);
398 }
399}
400
401static void arfs_del_rules(struct mlx5e_priv *priv)
402{
403 struct hlist_node *htmp;
404 struct arfs_rule *rule;
405 int i;
406 int j;
407
408 HLIST_HEAD(del_list);
409 spin_lock_bh(&priv->fs.arfs.arfs_lock);
410 mlx5e_for_each_arfs_rule(rule, htmp, priv->fs.arfs.arfs_tables, i, j) {
411 hlist_del_init(&rule->hlist);
412 hlist_add_head(&rule->hlist, &del_list);
413 }
414 spin_unlock_bh(&priv->fs.arfs.arfs_lock);
415
416 hlist_for_each_entry_safe(rule, htmp, &del_list, hlist) {
417 cancel_work_sync(&rule->arfs_work);
418 if (rule->rule)
419 mlx5_del_flow_rules(rule->rule);
420 hlist_del(&rule->hlist);
421 kfree(rule);
422 }
423}
424
425static struct hlist_head *
426arfs_hash_bucket(struct arfs_table *arfs_t, __be16 src_port,
427 __be16 dst_port)
428{
429 unsigned long l;
430 int bucket_idx;
431
432 l = (__force unsigned long)src_port |
433 ((__force unsigned long)dst_port << 2);
434
435 bucket_idx = hash_long(l, ARFS_HASH_SHIFT);
436
437 return &arfs_t->rules_hash[bucket_idx];
438}
439
440static struct arfs_table *arfs_get_table(struct mlx5e_arfs_tables *arfs,
441 u8 ip_proto, __be16 etype)
442{
443 if (etype == htons(ETH_P_IP) && ip_proto == IPPROTO_TCP)
444 return &arfs->arfs_tables[ARFS_IPV4_TCP];
445 if (etype == htons(ETH_P_IP) && ip_proto == IPPROTO_UDP)
446 return &arfs->arfs_tables[ARFS_IPV4_UDP];
447 if (etype == htons(ETH_P_IPV6) && ip_proto == IPPROTO_TCP)
448 return &arfs->arfs_tables[ARFS_IPV6_TCP];
449 if (etype == htons(ETH_P_IPV6) && ip_proto == IPPROTO_UDP)
450 return &arfs->arfs_tables[ARFS_IPV6_UDP];
451
452 return NULL;
453}
454
455static struct mlx5_flow_handle *arfs_add_rule(struct mlx5e_priv *priv,
456 struct arfs_rule *arfs_rule)
457{
458 struct mlx5e_arfs_tables *arfs = &priv->fs.arfs;
459 struct arfs_tuple *tuple = &arfs_rule->tuple;
460 struct mlx5_flow_handle *rule = NULL;
461 struct mlx5_flow_destination dest = {};
462 MLX5_DECLARE_FLOW_ACT(flow_act);
463 struct arfs_table *arfs_table;
464 struct mlx5_flow_spec *spec;
465 struct mlx5_flow_table *ft;
466 int err = 0;
467
468 spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
469 if (!spec) {
470 err = -ENOMEM;
471 goto out;
472 }
473 spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
474 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
475 outer_headers.ethertype);
476 MLX5_SET(fte_match_param, spec->match_value, outer_headers.ethertype,
477 ntohs(tuple->etype));
478 arfs_table = arfs_get_table(arfs, tuple->ip_proto, tuple->etype);
479 if (!arfs_table) {
480 err = -EINVAL;
481 goto out;
482 }
483
484 ft = arfs_table->ft.t;
485 if (tuple->ip_proto == IPPROTO_TCP) {
486 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
487 outer_headers.tcp_dport);
488 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
489 outer_headers.tcp_sport);
490 MLX5_SET(fte_match_param, spec->match_value, outer_headers.tcp_dport,
491 ntohs(tuple->dst_port));
492 MLX5_SET(fte_match_param, spec->match_value, outer_headers.tcp_sport,
493 ntohs(tuple->src_port));
494 } else {
495 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
496 outer_headers.udp_dport);
497 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
498 outer_headers.udp_sport);
499 MLX5_SET(fte_match_param, spec->match_value, outer_headers.udp_dport,
500 ntohs(tuple->dst_port));
501 MLX5_SET(fte_match_param, spec->match_value, outer_headers.udp_sport,
502 ntohs(tuple->src_port));
503 }
504 if (tuple->etype == htons(ETH_P_IP)) {
505 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
506 outer_headers.src_ipv4_src_ipv6.ipv4_layout.ipv4),
507 &tuple->src_ipv4,
508 4);
509 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
510 outer_headers.dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
511 &tuple->dst_ipv4,
512 4);
513 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
514 outer_headers.src_ipv4_src_ipv6.ipv4_layout.ipv4);
515 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
516 outer_headers.dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
517 } else {
518 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
519 outer_headers.src_ipv4_src_ipv6.ipv6_layout.ipv6),
520 &tuple->src_ipv6,
521 16);
522 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
523 outer_headers.dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
524 &tuple->dst_ipv6,
525 16);
526 memset(MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
527 outer_headers.src_ipv4_src_ipv6.ipv6_layout.ipv6),
528 0xff,
529 16);
530 memset(MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
531 outer_headers.dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
532 0xff,
533 16);
534 }
535 dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
536 dest.tir_num = priv->direct_tir[arfs_rule->rxq].tirn;
537 rule = mlx5_add_flow_rules(ft, spec, &flow_act, &dest, 1);
538 if (IS_ERR(rule)) {
539 err = PTR_ERR(rule);
540 priv->channel_stats[arfs_rule->rxq].rq.arfs_err++;
541 mlx5e_dbg(HW, priv,
542 "%s: add rule(filter id=%d, rq idx=%d, ip proto=0x%x) failed,err=%d\n",
543 __func__, arfs_rule->filter_id, arfs_rule->rxq,
544 tuple->ip_proto, err);
545 }
546
547out:
548 kvfree(spec);
549 return err ? ERR_PTR(err) : rule;
550}
551
552static void arfs_modify_rule_rq(struct mlx5e_priv *priv,
553 struct mlx5_flow_handle *rule, u16 rxq)
554{
555 struct mlx5_flow_destination dst = {};
556 int err = 0;
557
558 dst.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
559 dst.tir_num = priv->direct_tir[rxq].tirn;
560 err = mlx5_modify_rule_destination(rule, &dst, NULL);
561 if (err)
562 netdev_warn(priv->netdev,
563 "Failed to modify aRFS rule destination to rq=%d\n", rxq);
564}
565
566static void arfs_handle_work(struct work_struct *work)
567{
568 struct arfs_rule *arfs_rule = container_of(work,
569 struct arfs_rule,
570 arfs_work);
571 struct mlx5e_priv *priv = arfs_rule->priv;
572 struct mlx5_flow_handle *rule;
573
574 mutex_lock(&priv->state_lock);
575 if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
576 spin_lock_bh(&priv->fs.arfs.arfs_lock);
577 hlist_del(&arfs_rule->hlist);
578 spin_unlock_bh(&priv->fs.arfs.arfs_lock);
579
580 mutex_unlock(&priv->state_lock);
581 kfree(arfs_rule);
582 goto out;
583 }
584 mutex_unlock(&priv->state_lock);
585
586 if (!arfs_rule->rule) {
587 rule = arfs_add_rule(priv, arfs_rule);
588 if (IS_ERR(rule))
589 goto out;
590 arfs_rule->rule = rule;
591 } else {
592 arfs_modify_rule_rq(priv, arfs_rule->rule,
593 arfs_rule->rxq);
594 }
595out:
596 arfs_may_expire_flow(priv);
597}
598
599static struct arfs_rule *arfs_alloc_rule(struct mlx5e_priv *priv,
600 struct arfs_table *arfs_t,
601 const struct flow_keys *fk,
602 u16 rxq, u32 flow_id)
603{
604 struct arfs_rule *rule;
605 struct arfs_tuple *tuple;
606
607 rule = kzalloc(sizeof(*rule), GFP_ATOMIC);
608 if (!rule)
609 return NULL;
610
611 rule->priv = priv;
612 rule->rxq = rxq;
613 INIT_WORK(&rule->arfs_work, arfs_handle_work);
614
615 tuple = &rule->tuple;
616 tuple->etype = fk->basic.n_proto;
617 tuple->ip_proto = fk->basic.ip_proto;
618 if (tuple->etype == htons(ETH_P_IP)) {
619 tuple->src_ipv4 = fk->addrs.v4addrs.src;
620 tuple->dst_ipv4 = fk->addrs.v4addrs.dst;
621 } else {
622 memcpy(&tuple->src_ipv6, &fk->addrs.v6addrs.src,
623 sizeof(struct in6_addr));
624 memcpy(&tuple->dst_ipv6, &fk->addrs.v6addrs.dst,
625 sizeof(struct in6_addr));
626 }
627 tuple->src_port = fk->ports.src;
628 tuple->dst_port = fk->ports.dst;
629
630 rule->flow_id = flow_id;
631 rule->filter_id = priv->fs.arfs.last_filter_id++ % RPS_NO_FILTER;
632
633 hlist_add_head(&rule->hlist,
634 arfs_hash_bucket(arfs_t, tuple->src_port,
635 tuple->dst_port));
636 return rule;
637}
638
639static bool arfs_cmp(const struct arfs_tuple *tuple, const struct flow_keys *fk)
640{
641 if (tuple->src_port != fk->ports.src || tuple->dst_port != fk->ports.dst)
642 return false;
643 if (tuple->etype != fk->basic.n_proto)
644 return false;
645 if (tuple->etype == htons(ETH_P_IP))
646 return tuple->src_ipv4 == fk->addrs.v4addrs.src &&
647 tuple->dst_ipv4 == fk->addrs.v4addrs.dst;
648 if (tuple->etype == htons(ETH_P_IPV6))
649 return !memcmp(&tuple->src_ipv6, &fk->addrs.v6addrs.src,
650 sizeof(struct in6_addr)) &&
651 !memcmp(&tuple->dst_ipv6, &fk->addrs.v6addrs.dst,
652 sizeof(struct in6_addr));
653 return false;
654}
655
656static struct arfs_rule *arfs_find_rule(struct arfs_table *arfs_t,
657 const struct flow_keys *fk)
658{
659 struct arfs_rule *arfs_rule;
660 struct hlist_head *head;
661
662 head = arfs_hash_bucket(arfs_t, fk->ports.src, fk->ports.dst);
663 hlist_for_each_entry(arfs_rule, head, hlist) {
664 if (arfs_cmp(&arfs_rule->tuple, fk))
665 return arfs_rule;
666 }
667
668 return NULL;
669}
670
671int mlx5e_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
672 u16 rxq_index, u32 flow_id)
673{
674 struct mlx5e_priv *priv = netdev_priv(dev);
675 struct mlx5e_arfs_tables *arfs = &priv->fs.arfs;
676 struct arfs_table *arfs_t;
677 struct arfs_rule *arfs_rule;
678 struct flow_keys fk;
679
680 if (!skb_flow_dissect_flow_keys(skb, &fk, 0))
681 return -EPROTONOSUPPORT;
682
683 if (fk.basic.n_proto != htons(ETH_P_IP) &&
684 fk.basic.n_proto != htons(ETH_P_IPV6))
685 return -EPROTONOSUPPORT;
686
687 if (skb->encapsulation)
688 return -EPROTONOSUPPORT;
689
690 arfs_t = arfs_get_table(arfs, fk.basic.ip_proto, fk.basic.n_proto);
691 if (!arfs_t)
692 return -EPROTONOSUPPORT;
693
694 spin_lock_bh(&arfs->arfs_lock);
695 arfs_rule = arfs_find_rule(arfs_t, &fk);
696 if (arfs_rule) {
697 if (arfs_rule->rxq == rxq_index) {
698 spin_unlock_bh(&arfs->arfs_lock);
699 return arfs_rule->filter_id;
700 }
701 arfs_rule->rxq = rxq_index;
702 } else {
703 arfs_rule = arfs_alloc_rule(priv, arfs_t, &fk, rxq_index, flow_id);
704 if (!arfs_rule) {
705 spin_unlock_bh(&arfs->arfs_lock);
706 return -ENOMEM;
707 }
708 }
709 queue_work(priv->fs.arfs.wq, &arfs_rule->arfs_work);
710 spin_unlock_bh(&arfs->arfs_lock);
711 return arfs_rule->filter_id;
712}
713
714
