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33#ifdef CONFIG_RFS_ACCEL
34
35#include <linux/hash.h>
36#include <linux/mlx5/fs.h>
37#include <linux/ip.h>
38#include <linux/ipv6.h>
39#include "en.h"
40
41struct arfs_tuple {
42 __be16 etype;
43 u8 ip_proto;
44 union {
45 __be32 src_ipv4;
46 struct in6_addr src_ipv6;
47 };
48 union {
49 __be32 dst_ipv4;
50 struct in6_addr dst_ipv6;
51 };
52 __be16 src_port;
53 __be16 dst_port;
54};
55
56struct arfs_rule {
57 struct mlx5e_priv *priv;
58 struct work_struct arfs_work;
59 struct mlx5_flow_handle *rule;
60 struct hlist_node hlist;
61 int rxq;
62
63 int flow_id;
64
65 int filter_id;
66 struct arfs_tuple tuple;
67};
68
69#define mlx5e_for_each_arfs_rule(hn, tmp, arfs_tables, i, j) \
70 for (i = 0; i < ARFS_NUM_TYPES; i++) \
71 mlx5e_for_each_hash_arfs_rule(hn, tmp, arfs_tables[i].rules_hash, j)
72
73#define mlx5e_for_each_hash_arfs_rule(hn, tmp, hash, j) \
74 for (j = 0; j < ARFS_HASH_SIZE; j++) \
75 hlist_for_each_entry_safe(hn, tmp, &hash[j], hlist)
76
77static enum mlx5e_traffic_types arfs_get_tt(enum arfs_type type)
78{
79 switch (type) {
80 case ARFS_IPV4_TCP:
81 return MLX5E_TT_IPV4_TCP;
82 case ARFS_IPV4_UDP:
83 return MLX5E_TT_IPV4_UDP;
84 case ARFS_IPV6_TCP:
85 return MLX5E_TT_IPV6_TCP;
86 case ARFS_IPV6_UDP:
87 return MLX5E_TT_IPV6_UDP;
88 default:
89 return -EINVAL;
90 }
91}
92
93static int arfs_disable(struct mlx5e_priv *priv)
94{
95 struct mlx5_flow_destination dest;
96 struct mlx5e_tir *tir = priv->indir_tir;
97 int err = 0;
98 int tt;
99 int i;
100
101 dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
102 for (i = 0; i < ARFS_NUM_TYPES; i++) {
103 dest.tir_num = tir[i].tirn;
104 tt = arfs_get_tt(i);
105
106 err = mlx5_modify_rule_destination(priv->fs.ttc.rules[tt],
107 &dest, NULL);
108 if (err) {
109 netdev_err(priv->netdev,
110 "%s: modify ttc destination failed\n",
111 __func__);
112 return err;
113 }
114 }
115 return 0;
116}
117
118static void arfs_del_rules(struct mlx5e_priv *priv);
119
120int mlx5e_arfs_disable(struct mlx5e_priv *priv)
121{
122 arfs_del_rules(priv);
123
124 return arfs_disable(priv);
125}
126
127int mlx5e_arfs_enable(struct mlx5e_priv *priv)
128{
129 struct mlx5_flow_destination dest;
130 int err = 0;
131 int tt;
132 int i;
133
134 dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
135 for (i = 0; i < ARFS_NUM_TYPES; i++) {
136 dest.ft = priv->fs.arfs.arfs_tables[i].ft.t;
137 tt = arfs_get_tt(i);
138
139 err = mlx5_modify_rule_destination(priv->fs.ttc.rules[tt],
140 &dest, NULL);
141 if (err) {
142 netdev_err(priv->netdev,
143 "%s: modify ttc destination failed err=%d\n",
144 __func__, err);
145 arfs_disable(priv);
146 return err;
147 }
148 }
149 return 0;
150}
151
152static void arfs_destroy_table(struct arfs_table *arfs_t)
153{
154 mlx5_del_flow_rules(arfs_t->default_rule);
155 mlx5e_destroy_flow_table(&arfs_t->ft);
156}
157
158void mlx5e_arfs_destroy_tables(struct mlx5e_priv *priv)
159{
160 int i;
161
162 if (!(priv->netdev->hw_features & NETIF_F_NTUPLE))
163 return;
164
165 arfs_del_rules(priv);
166 destroy_workqueue(priv->fs.arfs.wq);
167 for (i = 0; i < ARFS_NUM_TYPES; i++) {
168 if (!IS_ERR_OR_NULL(priv->fs.arfs.arfs_tables[i].ft.t))
169 arfs_destroy_table(&priv->fs.arfs.arfs_tables[i]);
170 }
171}
172
173static int arfs_add_default_rule(struct mlx5e_priv *priv,
174 enum arfs_type type)
175{
176 struct arfs_table *arfs_t = &priv->fs.arfs.arfs_tables[type];
177 struct mlx5e_tir *tir = priv->indir_tir;
178 struct mlx5_flow_destination dest;
179 MLX5_DECLARE_FLOW_ACT(flow_act);
180 struct mlx5_flow_spec *spec;
181 enum mlx5e_traffic_types tt;
182 int err = 0;
183
184 spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
185 if (!spec) {
186 err = -ENOMEM;
187 goto out;
188 }
189
190 dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
191 tt = arfs_get_tt(type);
192 if (tt == -EINVAL) {
193 netdev_err(priv->netdev, "%s: bad arfs_type: %d\n",
194 __func__, type);
195 err = -EINVAL;
196 goto out;
197 }
198
199 dest.tir_num = tir[tt].tirn;
200
201 arfs_t->default_rule = mlx5_add_flow_rules(arfs_t->ft.t, spec,
202 &flow_act,
203 &dest, 1);
204 if (IS_ERR(arfs_t->default_rule)) {
205 err = PTR_ERR(arfs_t->default_rule);
206 arfs_t->default_rule = NULL;
207 netdev_err(priv->netdev, "%s: add rule failed, arfs type=%d\n",
208 __func__, type);
209 }
210out:
211 kvfree(spec);
212 return err;
213}
214
215#define MLX5E_ARFS_NUM_GROUPS 2
216#define MLX5E_ARFS_GROUP1_SIZE BIT(12)
217#define MLX5E_ARFS_GROUP2_SIZE BIT(0)
218#define MLX5E_ARFS_TABLE_SIZE (MLX5E_ARFS_GROUP1_SIZE +\
219 MLX5E_ARFS_GROUP2_SIZE)
220static int arfs_create_groups(struct mlx5e_flow_table *ft,
221 enum arfs_type type)
222{
223 int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
224 void *outer_headers_c;
225 int ix = 0;
226 u32 *in;
227 int err;
228 u8 *mc;
229
230 ft->g = kcalloc(MLX5E_ARFS_NUM_GROUPS,
231 sizeof(*ft->g), GFP_KERNEL);
232 in = kvzalloc(inlen, GFP_KERNEL);
233 if (!in || !ft->g) {
234 kvfree(ft->g);
235 kvfree(in);
236 return -ENOMEM;
237 }
238
239 mc = MLX5_ADDR_OF(create_flow_group_in, in, match_criteria);
240 outer_headers_c = MLX5_ADDR_OF(fte_match_param, mc,
241 outer_headers);
242 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, ethertype);
243 switch (type) {
244 case ARFS_IPV4_TCP:
245 case ARFS_IPV6_TCP:
246 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, tcp_dport);
247 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, tcp_sport);
248 break;
249 case ARFS_IPV4_UDP:
250 case ARFS_IPV6_UDP:
251 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, udp_dport);
252 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c, udp_sport);
253 break;
254 default:
255 err = -EINVAL;
256 goto out;
257 }
258
259 switch (type) {
260 case ARFS_IPV4_TCP:
261 case ARFS_IPV4_UDP:
262 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c,
263 src_ipv4_src_ipv6.ipv4_layout.ipv4);
264 MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, outer_headers_c,
265 dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
266 break;
267 case ARFS_IPV6_TCP:
268 case ARFS_IPV6_UDP:
269 memset(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_c,
270 src_ipv4_src_ipv6.ipv6_layout.ipv6),
271 0xff, 16);
272 memset(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_c,
273 dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
274 0xff, 16);
275 break;
276 default:
277 err = -EINVAL;
278 goto out;
279 }
280
281 MLX5_SET_CFG(in, match_criteria_enable, MLX5_MATCH_OUTER_HEADERS);
282 MLX5_SET_CFG(in, start_flow_index, ix);
283 ix += MLX5E_ARFS_GROUP1_SIZE;
284 MLX5_SET_CFG(in, end_flow_index, ix - 1);
285 ft->g[ft->num_groups] = mlx5_create_flow_group(ft->t, in);
286 if (IS_ERR(ft->g[ft->num_groups]))
287 goto err;
288 ft->num_groups++;
289
290 memset(in, 0, inlen);
291 MLX5_SET_CFG(in, start_flow_index, ix);
292 ix += MLX5E_ARFS_GROUP2_SIZE;
293 MLX5_SET_CFG(in, end_flow_index, ix - 1);
294 ft->g[ft->num_groups] = mlx5_create_flow_group(ft->t, in);
295 if (IS_ERR(ft->g[ft->num_groups]))
296 goto err;
297 ft->num_groups++;
298
299 kvfree(in);
300 return 0;
301
302err:
303 err = PTR_ERR(ft->g[ft->num_groups]);
304 ft->g[ft->num_groups] = NULL;
305out:
306 kvfree(in);
307
308 return err;
309}
310
311static int arfs_create_table(struct mlx5e_priv *priv,
312 enum arfs_type type)
313{
314 struct mlx5e_arfs_tables *arfs = &priv->fs.arfs;
315 struct mlx5e_flow_table *ft = &arfs->arfs_tables[type].ft;
316 struct mlx5_flow_table_attr ft_attr = {};
317 int err;
318
319 ft->num_groups = 0;
320
321 ft_attr.max_fte = MLX5E_ARFS_TABLE_SIZE;
322 ft_attr.level = MLX5E_ARFS_FT_LEVEL;
323 ft_attr.prio = MLX5E_NIC_PRIO;
324
325 ft->t = mlx5_create_flow_table(priv->fs.ns, &ft_attr);
326 if (IS_ERR(ft->t)) {
327 err = PTR_ERR(ft->t);
328 ft->t = NULL;
329 return err;
330 }
331
332 err = arfs_create_groups(ft, type);
333 if (err)
334 goto err;
335
336 err = arfs_add_default_rule(priv, type);
337 if (err)
338 goto err;
339
340 return 0;
341err:
342 mlx5e_destroy_flow_table(ft);
343 return err;
344}
345
346int mlx5e_arfs_create_tables(struct mlx5e_priv *priv)
347{
348 int err = 0;
349 int i;
350
351 if (!(priv->netdev->hw_features & NETIF_F_NTUPLE))
352 return 0;
353
354 spin_lock_init(&priv->fs.arfs.arfs_lock);
355 INIT_LIST_HEAD(&priv->fs.arfs.rules);
356 priv->fs.arfs.wq = create_singlethread_workqueue("mlx5e_arfs");
357 if (!priv->fs.arfs.wq)
358 return -ENOMEM;
359
360 for (i = 0; i < ARFS_NUM_TYPES; i++) {
361 err = arfs_create_table(priv, i);
362 if (err)
363 goto err;
364 }
365 return 0;
366err:
367 mlx5e_arfs_destroy_tables(priv);
368 return err;
369}
370
371#define MLX5E_ARFS_EXPIRY_QUOTA 60
372
373static void arfs_may_expire_flow(struct mlx5e_priv *priv)
374{
375 struct arfs_rule *arfs_rule;
376 struct hlist_node *htmp;
377 int quota = 0;
378 int i;
379 int j;
380
381 HLIST_HEAD(del_list);
382 spin_lock_bh(&priv->fs.arfs.arfs_lock);
383 mlx5e_for_each_arfs_rule(arfs_rule, htmp, priv->fs.arfs.arfs_tables, i, j) {
384 if (quota++ > MLX5E_ARFS_EXPIRY_QUOTA)
385 break;
386 if (!work_pending(&arfs_rule->arfs_work) &&
387 rps_may_expire_flow(priv->netdev,
388 arfs_rule->rxq, arfs_rule->flow_id,
389 arfs_rule->filter_id)) {
390 hlist_del_init(&arfs_rule->hlist);
391 hlist_add_head(&arfs_rule->hlist, &del_list);
392 }
393 }
394 spin_unlock_bh(&priv->fs.arfs.arfs_lock);
395 hlist_for_each_entry_safe(arfs_rule, htmp, &del_list, hlist) {
396 if (arfs_rule->rule)
397 mlx5_del_flow_rules(arfs_rule->rule);
398 hlist_del(&arfs_rule->hlist);
399 kfree(arfs_rule);
400 }
401}
402
403static void arfs_del_rules(struct mlx5e_priv *priv)
404{
405 struct hlist_node *htmp;
406 struct arfs_rule *rule;
407 int i;
408 int j;
409
410 HLIST_HEAD(del_list);
411 spin_lock_bh(&priv->fs.arfs.arfs_lock);
412 mlx5e_for_each_arfs_rule(rule, htmp, priv->fs.arfs.arfs_tables, i, j) {
413 hlist_del_init(&rule->hlist);
414 hlist_add_head(&rule->hlist, &del_list);
415 }
416 spin_unlock_bh(&priv->fs.arfs.arfs_lock);
417
418 hlist_for_each_entry_safe(rule, htmp, &del_list, hlist) {
419 cancel_work_sync(&rule->arfs_work);
420 if (rule->rule)
421 mlx5_del_flow_rules(rule->rule);
422 hlist_del(&rule->hlist);
423 kfree(rule);
424 }
425}
426
427static struct hlist_head *
428arfs_hash_bucket(struct arfs_table *arfs_t, __be16 src_port,
429 __be16 dst_port)
430{
431 unsigned long l;
432 int bucket_idx;
433
434 l = (__force unsigned long)src_port |
435 ((__force unsigned long)dst_port << 2);
436
437 bucket_idx = hash_long(l, ARFS_HASH_SHIFT);
438
439 return &arfs_t->rules_hash[bucket_idx];
440}
441
442static u8 arfs_get_ip_proto(const struct sk_buff *skb)
443{
444 return (skb->protocol == htons(ETH_P_IP)) ?
445 ip_hdr(skb)->protocol : ipv6_hdr(skb)->nexthdr;
446}
447
448static struct arfs_table *arfs_get_table(struct mlx5e_arfs_tables *arfs,
449 u8 ip_proto, __be16 etype)
450{
451 if (etype == htons(ETH_P_IP) && ip_proto == IPPROTO_TCP)
452 return &arfs->arfs_tables[ARFS_IPV4_TCP];
453 if (etype == htons(ETH_P_IP) && ip_proto == IPPROTO_UDP)
454 return &arfs->arfs_tables[ARFS_IPV4_UDP];
455 if (etype == htons(ETH_P_IPV6) && ip_proto == IPPROTO_TCP)
456 return &arfs->arfs_tables[ARFS_IPV6_TCP];
457 if (etype == htons(ETH_P_IPV6) && ip_proto == IPPROTO_UDP)
458 return &arfs->arfs_tables[ARFS_IPV6_UDP];
459
460 return NULL;
461}
462
463static struct mlx5_flow_handle *arfs_add_rule(struct mlx5e_priv *priv,
464 struct arfs_rule *arfs_rule)
465{
466 struct mlx5e_arfs_tables *arfs = &priv->fs.arfs;
467 struct arfs_tuple *tuple = &arfs_rule->tuple;
468 struct mlx5_flow_handle *rule = NULL;
469 struct mlx5_flow_destination dest;
470 MLX5_DECLARE_FLOW_ACT(flow_act);
471 struct arfs_table *arfs_table;
472 struct mlx5_flow_spec *spec;
473 struct mlx5_flow_table *ft;
474 int err = 0;
475
476 spec = kvzalloc(sizeof(*spec), GFP_KERNEL);
477 if (!spec) {
478 err = -ENOMEM;
479 goto out;
480 }
481 spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS;
482 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
483 outer_headers.ethertype);
484 MLX5_SET(fte_match_param, spec->match_value, outer_headers.ethertype,
485 ntohs(tuple->etype));
486 arfs_table = arfs_get_table(arfs, tuple->ip_proto, tuple->etype);
487 if (!arfs_table) {
488 err = -EINVAL;
489 goto out;
490 }
491
492 ft = arfs_table->ft.t;
493 if (tuple->ip_proto == IPPROTO_TCP) {
494 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
495 outer_headers.tcp_dport);
496 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
497 outer_headers.tcp_sport);
498 MLX5_SET(fte_match_param, spec->match_value, outer_headers.tcp_dport,
499 ntohs(tuple->dst_port));
500 MLX5_SET(fte_match_param, spec->match_value, outer_headers.tcp_sport,
501 ntohs(tuple->src_port));
502 } else {
503 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
504 outer_headers.udp_dport);
505 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
506 outer_headers.udp_sport);
507 MLX5_SET(fte_match_param, spec->match_value, outer_headers.udp_dport,
508 ntohs(tuple->dst_port));
509 MLX5_SET(fte_match_param, spec->match_value, outer_headers.udp_sport,
510 ntohs(tuple->src_port));
511 }
512 if (tuple->etype == htons(ETH_P_IP)) {
513 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
514 outer_headers.src_ipv4_src_ipv6.ipv4_layout.ipv4),
515 &tuple->src_ipv4,
516 4);
517 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
518 outer_headers.dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
519 &tuple->dst_ipv4,
520 4);
521 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
522 outer_headers.src_ipv4_src_ipv6.ipv4_layout.ipv4);
523 MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria,
524 outer_headers.dst_ipv4_dst_ipv6.ipv4_layout.ipv4);
525 } else {
526 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
527 outer_headers.src_ipv4_src_ipv6.ipv6_layout.ipv6),
528 &tuple->src_ipv6,
529 16);
530 memcpy(MLX5_ADDR_OF(fte_match_param, spec->match_value,
531 outer_headers.dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
532 &tuple->dst_ipv6,
533 16);
534 memset(MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
535 outer_headers.src_ipv4_src_ipv6.ipv6_layout.ipv6),
536 0xff,
537 16);
538 memset(MLX5_ADDR_OF(fte_match_param, spec->match_criteria,
539 outer_headers.dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
540 0xff,
541 16);
542 }
543 dest.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
544 dest.tir_num = priv->direct_tir[arfs_rule->rxq].tirn;
545 rule = mlx5_add_flow_rules(ft, spec, &flow_act, &dest, 1);
546 if (IS_ERR(rule)) {
547 err = PTR_ERR(rule);
548 netdev_err(priv->netdev, "%s: add rule(filter id=%d, rq idx=%d) failed, err=%d\n",
549 __func__, arfs_rule->filter_id, arfs_rule->rxq, err);
550 }
551
552out:
553 kvfree(spec);
554 return err ? ERR_PTR(err) : rule;
555}
556
557static void arfs_modify_rule_rq(struct mlx5e_priv *priv,
558 struct mlx5_flow_handle *rule, u16 rxq)
559{
560 struct mlx5_flow_destination dst;
561 int err = 0;
562
563 dst.type = MLX5_FLOW_DESTINATION_TYPE_TIR;
564 dst.tir_num = priv->direct_tir[rxq].tirn;
565 err = mlx5_modify_rule_destination(rule, &dst, NULL);
566 if (err)
567 netdev_warn(priv->netdev,
568 "Failed to modfiy aRFS rule destination to rq=%d\n", rxq);
569}
570
571static void arfs_handle_work(struct work_struct *work)
572{
573 struct arfs_rule *arfs_rule = container_of(work,
574 struct arfs_rule,
575 arfs_work);
576 struct mlx5e_priv *priv = arfs_rule->priv;
577 struct mlx5_flow_handle *rule;
578
579 mutex_lock(&priv->state_lock);
580 if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
581 spin_lock_bh(&priv->fs.arfs.arfs_lock);
582 hlist_del(&arfs_rule->hlist);
583 spin_unlock_bh(&priv->fs.arfs.arfs_lock);
584
585 mutex_unlock(&priv->state_lock);
586 kfree(arfs_rule);
587 goto out;
588 }
589 mutex_unlock(&priv->state_lock);
590
591 if (!arfs_rule->rule) {
592 rule = arfs_add_rule(priv, arfs_rule);
593 if (IS_ERR(rule))
594 goto out;
595 arfs_rule->rule = rule;
596 } else {
597 arfs_modify_rule_rq(priv, arfs_rule->rule,
598 arfs_rule->rxq);
599 }
600out:
601 arfs_may_expire_flow(priv);
602}
603
604
605static __be16 arfs_get_dst_port(const struct sk_buff *skb)
606{
607 char *transport_header;
608
609 transport_header = skb_transport_header(skb);
610 if (arfs_get_ip_proto(skb) == IPPROTO_TCP)
611 return ((struct tcphdr *)transport_header)->dest;
612 return ((struct udphdr *)transport_header)->dest;
613}
614
615
616static __be16 arfs_get_src_port(const struct sk_buff *skb)
617{
618 char *transport_header;
619
620 transport_header = skb_transport_header(skb);
621 if (arfs_get_ip_proto(skb) == IPPROTO_TCP)
622 return ((struct tcphdr *)transport_header)->source;
623 return ((struct udphdr *)transport_header)->source;
624}
625
626static struct arfs_rule *arfs_alloc_rule(struct mlx5e_priv *priv,
627 struct arfs_table *arfs_t,
628 const struct sk_buff *skb,
629 u16 rxq, u32 flow_id)
630{
631 struct arfs_rule *rule;
632 struct arfs_tuple *tuple;
633
634 rule = kzalloc(sizeof(*rule), GFP_ATOMIC);
635 if (!rule)
636 return NULL;
637
638 rule->priv = priv;
639 rule->rxq = rxq;
640 INIT_WORK(&rule->arfs_work, arfs_handle_work);
641
642 tuple = &rule->tuple;
643 tuple->etype = skb->protocol;
644 if (tuple->etype == htons(ETH_P_IP)) {
645 tuple->src_ipv4 = ip_hdr(skb)->saddr;
646 tuple->dst_ipv4 = ip_hdr(skb)->daddr;
647 } else {
648 memcpy(&tuple->src_ipv6, &ipv6_hdr(skb)->saddr,
649 sizeof(struct in6_addr));
650 memcpy(&tuple->dst_ipv6, &ipv6_hdr(skb)->daddr,
651 sizeof(struct in6_addr));
652 }
653 tuple->ip_proto = arfs_get_ip_proto(skb);
654 tuple->src_port = arfs_get_src_port(skb);
655 tuple->dst_port = arfs_get_dst_port(skb);
656
657 rule->flow_id = flow_id;
658 rule->filter_id = priv->fs.arfs.last_filter_id++ % RPS_NO_FILTER;
659
660 hlist_add_head(&rule->hlist,
661 arfs_hash_bucket(arfs_t, tuple->src_port,
662 tuple->dst_port));
663 return rule;
664}
665
666static bool arfs_cmp_ips(struct arfs_tuple *tuple,
667 const struct sk_buff *skb)
668{
669 if (tuple->etype == htons(ETH_P_IP) &&
670 tuple->src_ipv4 == ip_hdr(skb)->saddr &&
671 tuple->dst_ipv4 == ip_hdr(skb)->daddr)
672 return true;
673 if (tuple->etype == htons(ETH_P_IPV6) &&
674 (!memcmp(&tuple->src_ipv6, &ipv6_hdr(skb)->saddr,
675 sizeof(struct in6_addr))) &&
676 (!memcmp(&tuple->dst_ipv6, &ipv6_hdr(skb)->daddr,
677 sizeof(struct in6_addr))))
678 return true;
679 return false;
680}
681
682static struct arfs_rule *arfs_find_rule(struct arfs_table *arfs_t,
683 const struct sk_buff *skb)
684{
685 struct arfs_rule *arfs_rule;
686 struct hlist_head *head;
687 __be16 src_port = arfs_get_src_port(skb);
688 __be16 dst_port = arfs_get_dst_port(skb);
689
690 head = arfs_hash_bucket(arfs_t, src_port, dst_port);
691 hlist_for_each_entry(arfs_rule, head, hlist) {
692 if (arfs_rule->tuple.src_port == src_port &&
693 arfs_rule->tuple.dst_port == dst_port &&
694 arfs_cmp_ips(&arfs_rule->tuple, skb)) {
695 return arfs_rule;
696 }
697 }
698
699 return NULL;
700}
701
702int mlx5e_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
703 u16 rxq_index, u32 flow_id)
704{
705 struct mlx5e_priv *priv = netdev_priv(dev);
706 struct mlx5e_arfs_tables *arfs = &priv->fs.arfs;
707 struct arfs_table *arfs_t;
708 struct arfs_rule *arfs_rule;
709
710 if (skb->protocol != htons(ETH_P_IP) &&
711 skb->protocol != htons(ETH_P_IPV6))
712 return -EPROTONOSUPPORT;
713
714 arfs_t = arfs_get_table(arfs, arfs_get_ip_proto(skb), skb->protocol);
715 if (!arfs_t)
716 return -EPROTONOSUPPORT;
717
718 spin_lock_bh(&arfs->arfs_lock);
719 arfs_rule = arfs_find_rule(arfs_t, skb);
720 if (arfs_rule) {
721 if (arfs_rule->rxq == rxq_index) {
722 spin_unlock_bh(&arfs->arfs_lock);
723 return arfs_rule->filter_id;
724 }
725 arfs_rule->rxq = rxq_index;
726 } else {
727 arfs_rule = arfs_alloc_rule(priv, arfs_t, skb,
728 rxq_index, flow_id);
729 if (!arfs_rule) {
730 spin_unlock_bh(&arfs->arfs_lock);
731 return -ENOMEM;
732 }
733 }
734 queue_work(priv->fs.arfs.wq, &arfs_rule->arfs_work);
735 spin_unlock_bh(&arfs->arfs_lock);
736 return arfs_rule->filter_id;
737}
738#endif
739
