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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / chelsio / cxgb4 / cxgb4_tc_flower.c
blobbb5513bdd293efdfd2421c1a7b6b706609c5b955
1 /*
2 * This file is part of the Chelsio T4/T5/T6 Ethernet driver for Linux.
3 *
4 * Copyright (c) 2017 Chelsio Communications, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35 #include <net/tc_act/tc_mirred.h>
36 #include <net/tc_act/tc_pedit.h>
37 #include <net/tc_act/tc_gact.h>
38 #include <net/tc_act/tc_vlan.h>
39
40 #include "cxgb4.h"
41 #include "cxgb4_filter.h"
42 #include "cxgb4_tc_flower.h"
43
44 #define STATS_CHECK_PERIOD (HZ / 2)
45
46 static struct ch_tc_pedit_fields pedits[] = {
47 PEDIT_FIELDS(ETH_, DMAC_31_0, 4, dmac, 0),
48 PEDIT_FIELDS(ETH_, DMAC_47_32, 2, dmac, 4),
49 PEDIT_FIELDS(ETH_, SMAC_15_0, 2, smac, 0),
50 PEDIT_FIELDS(ETH_, SMAC_47_16, 4, smac, 2),
51 PEDIT_FIELDS(IP4_, SRC, 4, nat_fip, 0),
52 PEDIT_FIELDS(IP4_, DST, 4, nat_lip, 0),
53 PEDIT_FIELDS(IP6_, SRC_31_0, 4, nat_fip, 0),
54 PEDIT_FIELDS(IP6_, SRC_63_32, 4, nat_fip, 4),
55 PEDIT_FIELDS(IP6_, SRC_95_64, 4, nat_fip, 8),
56 PEDIT_FIELDS(IP6_, SRC_127_96, 4, nat_fip, 12),
57 PEDIT_FIELDS(IP6_, DST_31_0, 4, nat_lip, 0),
58 PEDIT_FIELDS(IP6_, DST_63_32, 4, nat_lip, 4),
59 PEDIT_FIELDS(IP6_, DST_95_64, 4, nat_lip, 8),
60 PEDIT_FIELDS(IP6_, DST_127_96, 4, nat_lip, 12),
61 PEDIT_FIELDS(TCP_, SPORT, 2, nat_fport, 0),
62 PEDIT_FIELDS(TCP_, DPORT, 2, nat_lport, 0),
63 PEDIT_FIELDS(UDP_, SPORT, 2, nat_fport, 0),
64 PEDIT_FIELDS(UDP_, DPORT, 2, nat_lport, 0),
65 };
66
67 static struct ch_tc_flower_entry *allocate_flower_entry(void)
68 {
69 struct ch_tc_flower_entry *new = kzalloc(sizeof(*new), GFP_KERNEL);
70 if (new)
71 spin_lock_init(&new->lock);
72 return new;
73 }
74
75 /* Must be called with either RTNL or rcu_read_lock */
76 static struct ch_tc_flower_entry *ch_flower_lookup(struct adapter *adap,
77 unsigned long flower_cookie)
78 {
79 return rhashtable_lookup_fast(&adap->flower_tbl, &flower_cookie,
80 adap->flower_ht_params);
81 }
82
83 static void cxgb4_process_flow_match(struct net_device *dev,
84 struct flow_cls_offload *cls,
85 struct ch_filter_specification *fs)
86 {
87 struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
88 u16 addr_type = 0;
89
90 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
91 struct flow_match_control match;
92
93 flow_rule_match_control(rule, &match);
94 addr_type = match.key->addr_type;
95 }
96
97 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
98 struct flow_match_basic match;
99 u16 ethtype_key, ethtype_mask;
100
101 flow_rule_match_basic(rule, &match);
102 ethtype_key = ntohs(match.key->n_proto);
103 ethtype_mask = ntohs(match.mask->n_proto);
104
105 if (ethtype_key == ETH_P_ALL) {
106 ethtype_key = 0;
107 ethtype_mask = 0;
108 }
109
110 if (ethtype_key == ETH_P_IPV6)
111 fs->type = 1;
112
113 fs->val.ethtype = ethtype_key;
114 fs->mask.ethtype = ethtype_mask;
115 fs->val.proto = match.key->ip_proto;
116 fs->mask.proto = match.mask->ip_proto;
117 }
118
119 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
120 struct flow_match_ipv4_addrs match;
121
122 flow_rule_match_ipv4_addrs(rule, &match);
123 fs->type = 0;
124 memcpy(&fs->val.lip[0], &match.key->dst, sizeof(match.key->dst));
125 memcpy(&fs->val.fip[0], &match.key->src, sizeof(match.key->src));
126 memcpy(&fs->mask.lip[0], &match.mask->dst, sizeof(match.mask->dst));
127 memcpy(&fs->mask.fip[0], &match.mask->src, sizeof(match.mask->src));
128
129 /* also initialize nat_lip/fip to same values */
130 memcpy(&fs->nat_lip[0], &match.key->dst, sizeof(match.key->dst));
131 memcpy(&fs->nat_fip[0], &match.key->src, sizeof(match.key->src));
132 }
133
134 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
135 struct flow_match_ipv6_addrs match;
136
137 flow_rule_match_ipv6_addrs(rule, &match);
138 fs->type = 1;
139 memcpy(&fs->val.lip[0], match.key->dst.s6_addr,
140 sizeof(match.key->dst));
141 memcpy(&fs->val.fip[0], match.key->src.s6_addr,
142 sizeof(match.key->src));
143 memcpy(&fs->mask.lip[0], match.mask->dst.s6_addr,
144 sizeof(match.mask->dst));
145 memcpy(&fs->mask.fip[0], match.mask->src.s6_addr,
146 sizeof(match.mask->src));
147
148 /* also initialize nat_lip/fip to same values */
149 memcpy(&fs->nat_lip[0], match.key->dst.s6_addr,
150 sizeof(match.key->dst));
151 memcpy(&fs->nat_fip[0], match.key->src.s6_addr,
152 sizeof(match.key->src));
153 }
154
155 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
156 struct flow_match_ports match;
157
158 flow_rule_match_ports(rule, &match);
159 fs->val.lport = cpu_to_be16(match.key->dst);
160 fs->mask.lport = cpu_to_be16(match.mask->dst);
161 fs->val.fport = cpu_to_be16(match.key->src);
162 fs->mask.fport = cpu_to_be16(match.mask->src);
163
164 /* also initialize nat_lport/fport to same values */
165 fs->nat_lport = cpu_to_be16(match.key->dst);
166 fs->nat_fport = cpu_to_be16(match.key->src);
167 }
168
169 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) {
170 struct flow_match_ip match;
171
172 flow_rule_match_ip(rule, &match);
173 fs->val.tos = match.key->tos;
174 fs->mask.tos = match.mask->tos;
175 }
176
177 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
178 struct flow_match_enc_keyid match;
179
180 flow_rule_match_enc_keyid(rule, &match);
181 fs->val.vni = be32_to_cpu(match.key->keyid);
182 fs->mask.vni = be32_to_cpu(match.mask->keyid);
183 if (fs->mask.vni) {
184 fs->val.encap_vld = 1;
185 fs->mask.encap_vld = 1;
186 }
187 }
188
189 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
190 struct flow_match_vlan match;
191 u16 vlan_tci, vlan_tci_mask;
192
193 flow_rule_match_vlan(rule, &match);
194 vlan_tci = match.key->vlan_id | (match.key->vlan_priority <<
195 VLAN_PRIO_SHIFT);
196 vlan_tci_mask = match.mask->vlan_id | (match.mask->vlan_priority <<
197 VLAN_PRIO_SHIFT);
198 fs->val.ivlan = vlan_tci;
199 fs->mask.ivlan = vlan_tci_mask;
200
201 fs->val.ivlan_vld = 1;
202 fs->mask.ivlan_vld = 1;
203
204 /* Chelsio adapters use ivlan_vld bit to match vlan packets
205 * as 802.1Q. Also, when vlan tag is present in packets,
206 * ethtype match is used then to match on ethtype of inner
207 * header ie. the header following the vlan header.
208 * So, set the ivlan_vld based on ethtype info supplied by
209 * TC for vlan packets if its 802.1Q. And then reset the
210 * ethtype value else, hw will try to match the supplied
211 * ethtype value with ethtype of inner header.
212 */
213 if (fs->val.ethtype == ETH_P_8021Q) {
214 fs->val.ethtype = 0;
215 fs->mask.ethtype = 0;
216 }
217 }
218
219 /* Match only packets coming from the ingress port where this
220 * filter will be created.
221 */
222 fs->val.iport = netdev2pinfo(dev)->port_id;
223 fs->mask.iport = ~0;
224 }
225
226 static int cxgb4_validate_flow_match(struct net_device *dev,
227 struct flow_cls_offload *cls)
228 {
229 struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
230 struct flow_dissector *dissector = rule->match.dissector;
231 u16 ethtype_mask = 0;
232 u16 ethtype_key = 0;
233
234 if (dissector->used_keys &
235 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
236 BIT(FLOW_DISSECTOR_KEY_BASIC) |
237 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
238 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
239 BIT(FLOW_DISSECTOR_KEY_PORTS) |
240 BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) |
241 BIT(FLOW_DISSECTOR_KEY_VLAN) |
242 BIT(FLOW_DISSECTOR_KEY_IP))) {
243 netdev_warn(dev, "Unsupported key used: 0x%x\n",
244 dissector->used_keys);
245 return -EOPNOTSUPP;
246 }
247
248 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
249 struct flow_match_basic match;
250
251 flow_rule_match_basic(rule, &match);
252 ethtype_key = ntohs(match.key->n_proto);
253 ethtype_mask = ntohs(match.mask->n_proto);
254 }
255
256 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) {
257 u16 eth_ip_type = ethtype_key & ethtype_mask;
258 struct flow_match_ip match;
259
260 if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) {
261 netdev_err(dev, "IP Key supported only with IPv4/v6");
262 return -EINVAL;
263 }
264
265 flow_rule_match_ip(rule, &match);
266 if (match.mask->ttl) {
267 netdev_warn(dev, "ttl match unsupported for offload");
268 return -EOPNOTSUPP;
269 }
270 }
271
272 return 0;
273 }
274
275 static void offload_pedit(struct ch_filter_specification *fs, u32 val, u32 mask,
276 u8 field)
277 {
278 u32 set_val = val & ~mask;
279 u32 offset = 0;
280 u8 size = 1;
281 int i;
282
283 for (i = 0; i < ARRAY_SIZE(pedits); i++) {
284 if (pedits[i].field == field) {
285 offset = pedits[i].offset;
286 size = pedits[i].size;
287 break;
288 }
289 }
290 memcpy((u8 *)fs + offset, &set_val, size);
291 }
292
293 static void process_pedit_field(struct ch_filter_specification *fs, u32 val,
294 u32 mask, u32 offset, u8 htype)
295 {
296 switch (htype) {
297 case FLOW_ACT_MANGLE_HDR_TYPE_ETH:
298 switch (offset) {
299 case PEDIT_ETH_DMAC_31_0:
300 fs->newdmac = 1;
301 offload_pedit(fs, val, mask, ETH_DMAC_31_0);
302 break;
303 case PEDIT_ETH_DMAC_47_32_SMAC_15_0:
304 if (~mask & PEDIT_ETH_DMAC_MASK)
305 offload_pedit(fs, val, mask, ETH_DMAC_47_32);
306 else
307 offload_pedit(fs, val >> 16, mask >> 16,
308 ETH_SMAC_15_0);
309 break;
310 case PEDIT_ETH_SMAC_47_16:
311 fs->newsmac = 1;
312 offload_pedit(fs, val, mask, ETH_SMAC_47_16);
313 }
314 break;
315 case FLOW_ACT_MANGLE_HDR_TYPE_IP4:
316 switch (offset) {
317 case PEDIT_IP4_SRC:
318 offload_pedit(fs, val, mask, IP4_SRC);
319 break;
320 case PEDIT_IP4_DST:
321 offload_pedit(fs, val, mask, IP4_DST);
322 }
323 fs->nat_mode = NAT_MODE_ALL;
324 break;
325 case FLOW_ACT_MANGLE_HDR_TYPE_IP6:
326 switch (offset) {
327 case PEDIT_IP6_SRC_31_0:
328 offload_pedit(fs, val, mask, IP6_SRC_31_0);
329 break;
330 case PEDIT_IP6_SRC_63_32:
331 offload_pedit(fs, val, mask, IP6_SRC_63_32);
332 break;
333 case PEDIT_IP6_SRC_95_64:
334 offload_pedit(fs, val, mask, IP6_SRC_95_64);
335 break;
336 case PEDIT_IP6_SRC_127_96:
337 offload_pedit(fs, val, mask, IP6_SRC_127_96);
338 break;
339 case PEDIT_IP6_DST_31_0:
340 offload_pedit(fs, val, mask, IP6_DST_31_0);
341 break;
342 case PEDIT_IP6_DST_63_32:
343 offload_pedit(fs, val, mask, IP6_DST_63_32);
344 break;
345 case PEDIT_IP6_DST_95_64:
346 offload_pedit(fs, val, mask, IP6_DST_95_64);
347 break;
348 case PEDIT_IP6_DST_127_96:
349 offload_pedit(fs, val, mask, IP6_DST_127_96);
350 }
351 fs->nat_mode = NAT_MODE_ALL;
352 break;
353 case FLOW_ACT_MANGLE_HDR_TYPE_TCP:
354 switch (offset) {
355 case PEDIT_TCP_SPORT_DPORT:
356 if (~mask & PEDIT_TCP_UDP_SPORT_MASK)
357 offload_pedit(fs, cpu_to_be32(val) >> 16,
358 cpu_to_be32(mask) >> 16,
359 TCP_SPORT);
360 else
361 offload_pedit(fs, cpu_to_be32(val),
362 cpu_to_be32(mask), TCP_DPORT);
363 }
364 fs->nat_mode = NAT_MODE_ALL;
365 break;
366 case FLOW_ACT_MANGLE_HDR_TYPE_UDP:
367 switch (offset) {
368 case PEDIT_UDP_SPORT_DPORT:
369 if (~mask & PEDIT_TCP_UDP_SPORT_MASK)
370 offload_pedit(fs, cpu_to_be32(val) >> 16,
371 cpu_to_be32(mask) >> 16,
372 UDP_SPORT);
373 else
374 offload_pedit(fs, cpu_to_be32(val),
375 cpu_to_be32(mask), UDP_DPORT);
376 }
377 fs->nat_mode = NAT_MODE_ALL;
378 }
379 }
380
381 void cxgb4_process_flow_actions(struct net_device *in,
382 struct flow_action *actions,
383 struct ch_filter_specification *fs)
384 {
385 struct flow_action_entry *act;
386 int i;
387
388 flow_action_for_each(i, act, actions) {
389 switch (act->id) {
390 case FLOW_ACTION_ACCEPT:
391 fs->action = FILTER_PASS;
392 break;
393 case FLOW_ACTION_DROP:
394 fs->action = FILTER_DROP;
395 break;
396 case FLOW_ACTION_REDIRECT: {
397 struct net_device *out = act->dev;
398 struct port_info *pi = netdev_priv(out);
399
400 fs->action = FILTER_SWITCH;
401 fs->eport = pi->port_id;
402 }
403 break;
404 case FLOW_ACTION_VLAN_POP:
405 case FLOW_ACTION_VLAN_PUSH:
406 case FLOW_ACTION_VLAN_MANGLE: {
407 u8 prio = act->vlan.prio;
408 u16 vid = act->vlan.vid;
409 u16 vlan_tci = (prio << VLAN_PRIO_SHIFT) | vid;
410 switch (act->id) {
411 case FLOW_ACTION_VLAN_POP:
412 fs->newvlan |= VLAN_REMOVE;
413 break;
414 case FLOW_ACTION_VLAN_PUSH:
415 fs->newvlan |= VLAN_INSERT;
416 fs->vlan = vlan_tci;
417 break;
418 case FLOW_ACTION_VLAN_MANGLE:
419 fs->newvlan |= VLAN_REWRITE;
420 fs->vlan = vlan_tci;
421 break;
422 default:
423 break;
424 }
425 }
426 break;
427 case FLOW_ACTION_MANGLE: {
428 u32 mask, val, offset;
429 u8 htype;
430
431 htype = act->mangle.htype;
432 mask = act->mangle.mask;
433 val = act->mangle.val;
434 offset = act->mangle.offset;
435
436 process_pedit_field(fs, val, mask, offset, htype);
437 }
438 break;
439 default:
440 break;
441 }
442 }
443 }
444
445 static bool valid_l4_mask(u32 mask)
446 {
447 u16 hi, lo;
448
449 /* Either the upper 16-bits (SPORT) OR the lower
450 * 16-bits (DPORT) can be set, but NOT BOTH.
451 */
452 hi = (mask >> 16) & 0xFFFF;
453 lo = mask & 0xFFFF;
454
455 return hi && lo ? false : true;
456 }
457
458 static bool valid_pedit_action(struct net_device *dev,
459 const struct flow_action_entry *act)
460 {
461 u32 mask, offset;
462 u8 htype;
463
464 htype = act->mangle.htype;
465 mask = act->mangle.mask;
466 offset = act->mangle.offset;
467
468 switch (htype) {
469 case FLOW_ACT_MANGLE_HDR_TYPE_ETH:
470 switch (offset) {
471 case PEDIT_ETH_DMAC_31_0:
472 case PEDIT_ETH_DMAC_47_32_SMAC_15_0:
473 case PEDIT_ETH_SMAC_47_16:
474 break;
475 default:
476 netdev_err(dev, "%s: Unsupported pedit field\n",
477 __func__);
478 return false;
479 }
480 break;
481 case FLOW_ACT_MANGLE_HDR_TYPE_IP4:
482 switch (offset) {
483 case PEDIT_IP4_SRC:
484 case PEDIT_IP4_DST:
485 break;
486 default:
487 netdev_err(dev, "%s: Unsupported pedit field\n",
488 __func__);
489 return false;
490 }
491 break;
492 case FLOW_ACT_MANGLE_HDR_TYPE_IP6:
493 switch (offset) {
494 case PEDIT_IP6_SRC_31_0:
495 case PEDIT_IP6_SRC_63_32:
496 case PEDIT_IP6_SRC_95_64:
497 case PEDIT_IP6_SRC_127_96:
498 case PEDIT_IP6_DST_31_0:
499 case PEDIT_IP6_DST_63_32:
500 case PEDIT_IP6_DST_95_64:
501 case PEDIT_IP6_DST_127_96:
502 break;
503 default:
504 netdev_err(dev, "%s: Unsupported pedit field\n",
505 __func__);
506 return false;
507 }
508 break;
509 case FLOW_ACT_MANGLE_HDR_TYPE_TCP:
510 switch (offset) {
511 case PEDIT_TCP_SPORT_DPORT:
512 if (!valid_l4_mask(~mask)) {
513 netdev_err(dev, "%s: Unsupported mask for TCP L4 ports\n",
514 __func__);
515 return false;
516 }
517 break;
518 default:
519 netdev_err(dev, "%s: Unsupported pedit field\n",
520 __func__);
521 return false;
522 }
523 break;
524 case FLOW_ACT_MANGLE_HDR_TYPE_UDP:
525 switch (offset) {
526 case PEDIT_UDP_SPORT_DPORT:
527 if (!valid_l4_mask(~mask)) {
528 netdev_err(dev, "%s: Unsupported mask for UDP L4 ports\n",
529 __func__);
530 return false;
531 }
532 break;
533 default:
534 netdev_err(dev, "%s: Unsupported pedit field\n",
535 __func__);
536 return false;
537 }
538 break;
539 default:
540 netdev_err(dev, "%s: Unsupported pedit type\n", __func__);
541 return false;
542 }
543 return true;
544 }
545
546 int cxgb4_validate_flow_actions(struct net_device *dev,
547 struct flow_action *actions)
548 {
549 struct flow_action_entry *act;
550 bool act_redir = false;
551 bool act_pedit = false;
552 bool act_vlan = false;
553 int i;
554
555 flow_action_for_each(i, act, actions) {
556 switch (act->id) {
557 case FLOW_ACTION_ACCEPT:
558 case FLOW_ACTION_DROP:
559 /* Do nothing */
560 break;
561 case FLOW_ACTION_REDIRECT: {
562 struct adapter *adap = netdev2adap(dev);
563 struct net_device *n_dev, *target_dev;
564 unsigned int i;
565 bool found = false;
566
567 target_dev = act->dev;
568 for_each_port(adap, i) {
569 n_dev = adap->port[i];
570 if (target_dev == n_dev) {
571 found = true;
572 break;
573 }
574 }
575
576 /* If interface doesn't belong to our hw, then
577 * the provided output port is not valid
578 */
579 if (!found) {
580 netdev_err(dev, "%s: Out port invalid\n",
581 __func__);
582 return -EINVAL;
583 }
584 act_redir = true;
585 }
586 break;
587 case FLOW_ACTION_VLAN_POP:
588 case FLOW_ACTION_VLAN_PUSH:
589 case FLOW_ACTION_VLAN_MANGLE: {
590 u16 proto = be16_to_cpu(act->vlan.proto);
591
592 switch (act->id) {
593 case FLOW_ACTION_VLAN_POP:
594 break;
595 case FLOW_ACTION_VLAN_PUSH:
596 case FLOW_ACTION_VLAN_MANGLE:
597 if (proto != ETH_P_8021Q) {
598 netdev_err(dev, "%s: Unsupported vlan proto\n",
599 __func__);
600 return -EOPNOTSUPP;
601 }
602 break;
603 default:
604 netdev_err(dev, "%s: Unsupported vlan action\n",
605 __func__);
606 return -EOPNOTSUPP;
607 }
608 act_vlan = true;
609 }
610 break;
611 case FLOW_ACTION_MANGLE: {
612 bool pedit_valid = valid_pedit_action(dev, act);
613
614 if (!pedit_valid)
615 return -EOPNOTSUPP;
616 act_pedit = true;
617 }
618 break;
619 default:
620 netdev_err(dev, "%s: Unsupported action\n", __func__);
621 return -EOPNOTSUPP;
622 }
623 }
624
625 if ((act_pedit || act_vlan) && !act_redir) {
626 netdev_err(dev, "%s: pedit/vlan rewrite invalid without egress redirect\n",
627 __func__);
628 return -EINVAL;
629 }
630
631 return 0;
632 }
633
634 int cxgb4_tc_flower_replace(struct net_device *dev,
635 struct flow_cls_offload *cls)
636 {
637 struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
638 struct netlink_ext_ack *extack = cls->common.extack;
639 struct adapter *adap = netdev2adap(dev);
640 struct ch_tc_flower_entry *ch_flower;
641 struct ch_filter_specification *fs;
642 struct filter_ctx ctx;
643 int fidx, ret;
644
645 if (cxgb4_validate_flow_actions(dev, &rule->action))
646 return -EOPNOTSUPP;
647
648 if (cxgb4_validate_flow_match(dev, cls))
649 return -EOPNOTSUPP;
650
651 ch_flower = allocate_flower_entry();
652 if (!ch_flower) {
653 netdev_err(dev, "%s: ch_flower alloc failed.\n", __func__);
654 return -ENOMEM;
655 }
656
657 fs = &ch_flower->fs;
658 fs->hitcnts = 1;
659 cxgb4_process_flow_match(dev, cls, fs);
660 cxgb4_process_flow_actions(dev, &rule->action, fs);
661
662 fs->hash = is_filter_exact_match(adap, fs);
663 if (fs->hash) {
664 fidx = 0;
665 } else {
666 u8 inet_family;
667
668 inet_family = fs->type ? PF_INET6 : PF_INET;
669
670 /* Note that TC uses prio 0 to indicate stack to
671 * generate automatic prio and hence doesn't pass prio
672 * 0 to driver. However, the hardware TCAM index
673 * starts from 0. Hence, the -1 here.
674 */
675 if (cls->common.prio <= (adap->tids.nftids +
676 adap->tids.nhpftids)) {
677 fidx = cls->common.prio - 1;
678 if (fidx < adap->tids.nhpftids)
679 fs->prio = 1;
680 } else {
681 fidx = cxgb4_get_free_ftid(dev, inet_family);
682 }
683
684 /* Only insert FLOWER rule if its priority doesn't
685 * conflict with existing rules in the LETCAM.
686 */
687 if (fidx < 0 ||
688 !cxgb4_filter_prio_in_range(dev, fidx, cls->common.prio)) {
689 NL_SET_ERR_MSG_MOD(extack,
690 "No free LETCAM index available");
691 ret = -ENOMEM;
692 goto free_entry;
693 }
694 }
695
696 fs->tc_prio = cls->common.prio;
697 fs->tc_cookie = cls->cookie;
698
699 init_completion(&ctx.completion);
700 ret = __cxgb4_set_filter(dev, fidx, fs, &ctx);
701 if (ret) {
702 netdev_err(dev, "%s: filter creation err %d\n",
703 __func__, ret);
704 goto free_entry;
705 }
706
707 /* Wait for reply */
708 ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ);
709 if (!ret) {
710 ret = -ETIMEDOUT;
711 goto free_entry;
712 }
713
714 ret = ctx.result;
715 /* Check if hw returned error for filter creation */
716 if (ret)
717 goto free_entry;
718
719 ch_flower->tc_flower_cookie = cls->cookie;
720 ch_flower->filter_id = ctx.tid;
721 ret = rhashtable_insert_fast(&adap->flower_tbl, &ch_flower->node,
722 adap->flower_ht_params);
723 if (ret)
724 goto del_filter;
725
726 return 0;
727
728 del_filter:
729 cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs);
730
731 free_entry:
732 kfree(ch_flower);
733 return ret;
734 }
735
736 int cxgb4_tc_flower_destroy(struct net_device *dev,
737 struct flow_cls_offload *cls)
738 {
739 struct adapter *adap = netdev2adap(dev);
740 struct ch_tc_flower_entry *ch_flower;
741 int ret;
742
743 ch_flower = ch_flower_lookup(adap, cls->cookie);
744 if (!ch_flower)
745 return -ENOENT;
746
747 ret = cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs);
748 if (ret)
749 goto err;
750
751 ret = rhashtable_remove_fast(&adap->flower_tbl, &ch_flower->node,
752 adap->flower_ht_params);
753 if (ret) {
754 netdev_err(dev, "Flow remove from rhashtable failed");
755 goto err;
756 }
757 kfree_rcu(ch_flower, rcu);
758
759 err:
760 return ret;
761 }
762
763 static void ch_flower_stats_handler(struct work_struct *work)
764 {
765 struct adapter *adap = container_of(work, struct adapter,
766 flower_stats_work);
767 struct ch_tc_flower_entry *flower_entry;
768 struct ch_tc_flower_stats *ofld_stats;
769 struct rhashtable_iter iter;
770 u64 packets;
771 u64 bytes;
772 int ret;
773
774 rhashtable_walk_enter(&adap->flower_tbl, &iter);
775 do {
776 rhashtable_walk_start(&iter);
777
778 while ((flower_entry = rhashtable_walk_next(&iter)) &&
779 !IS_ERR(flower_entry)) {
780 ret = cxgb4_get_filter_counters(adap->port[0],
781 flower_entry->filter_id,
782 &packets, &bytes,
783 flower_entry->fs.hash);
784 if (!ret) {
785 spin_lock(&flower_entry->lock);
786 ofld_stats = &flower_entry->stats;
787
788 if (ofld_stats->prev_packet_count != packets) {
789 ofld_stats->prev_packet_count = packets;
790 ofld_stats->last_used = jiffies;
791 }
792 spin_unlock(&flower_entry->lock);
793 }
794 }
795
796 rhashtable_walk_stop(&iter);
797
798 } while (flower_entry == ERR_PTR(-EAGAIN));
799 rhashtable_walk_exit(&iter);
800 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
801 }
802
803 static void ch_flower_stats_cb(struct timer_list *t)
804 {
805 struct adapter *adap = from_timer(adap, t, flower_stats_timer);
806
807 schedule_work(&adap->flower_stats_work);
808 }
809
810 int cxgb4_tc_flower_stats(struct net_device *dev,
811 struct flow_cls_offload *cls)
812 {
813 struct adapter *adap = netdev2adap(dev);
814 struct ch_tc_flower_stats *ofld_stats;
815 struct ch_tc_flower_entry *ch_flower;
816 u64 packets;
817 u64 bytes;
818 int ret;
819
820 ch_flower = ch_flower_lookup(adap, cls->cookie);
821 if (!ch_flower) {
822 ret = -ENOENT;
823 goto err;
824 }
825
826 ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id,
827 &packets, &bytes,
828 ch_flower->fs.hash);
829 if (ret < 0)
830 goto err;
831
832 spin_lock_bh(&ch_flower->lock);
833 ofld_stats = &ch_flower->stats;
834 if (ofld_stats->packet_count != packets) {
835 if (ofld_stats->prev_packet_count != packets)
836 ofld_stats->last_used = jiffies;
837 flow_stats_update(&cls->stats, bytes - ofld_stats->byte_count,
838 packets - ofld_stats->packet_count,
839 ofld_stats->last_used);
840
841 ofld_stats->packet_count = packets;
842 ofld_stats->byte_count = bytes;
843 ofld_stats->prev_packet_count = packets;
844 }
845 spin_unlock_bh(&ch_flower->lock);
846 return 0;
847
848 err:
849 return ret;
850 }
851
852 static const struct rhashtable_params cxgb4_tc_flower_ht_params = {
853 .nelem_hint = 384,
854 .head_offset = offsetof(struct ch_tc_flower_entry, node),
855 .key_offset = offsetof(struct ch_tc_flower_entry, tc_flower_cookie),
856 .key_len = sizeof(((struct ch_tc_flower_entry *)0)->tc_flower_cookie),
857 .max_size = 524288,
858 .min_size = 512,
859 .automatic_shrinking = true
860 };
861
862 int cxgb4_init_tc_flower(struct adapter *adap)
863 {
864 int ret;
865
866 if (adap->tc_flower_initialized)
867 return -EEXIST;
868
869 adap->flower_ht_params = cxgb4_tc_flower_ht_params;
870 ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params);
871 if (ret)
872 return ret;
873
874 INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler);
875 timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0);
876 mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD);
877 adap->tc_flower_initialized = true;
878 return 0;
879 }
880
881 void cxgb4_cleanup_tc_flower(struct adapter *adap)
882 {
883 if (!adap->tc_flower_initialized)
884 return;
885
886 if (adap->flower_stats_timer.function)
887 del_timer_sync(&adap->flower_stats_timer);
888 cancel_work_sync(&adap->flower_stats_work);
889 rhashtable_destroy(&adap->flower_tbl);
890 adap->tc_flower_initialized = false;
891 }
Linux with added FPC-III support