1 // SPDX-License-Identifier: GPL-2.0+
2 /* Microchip VCAP API
3 *
4 * Copyright (c) 2022 Microchip Technology Inc. and its subsidiaries.
5 */
6
7 #include <net/tc_act/tc_gate.h>
8 #include <net/tcp.h>
9
10 #include "sparx5_tc.h"
11 #include "vcap_api.h"
12 #include "vcap_api_client.h"
13 #include "vcap_tc.h"
14 #include "sparx5_main.h"
15 #include "sparx5_vcap_impl.h"
16
17 #define SPX5_MAX_RULE_SIZE 13 /* allows X1, X2, X4, X6 and X12 rules */
18
19 /* Collect keysets and type ids for multiple rules per size */
20 struct sparx5_wildcard_rule {
21 bool selected;
22 u8 value;
23 u8 mask;
24 enum vcap_keyfield_set keyset;
25 };
26
27 struct sparx5_multiple_rules {
28 struct sparx5_wildcard_rule rule[SPX5_MAX_RULE_SIZE];
29 };
30
31 struct sparx5_tc_flower_template {
32 struct list_head list; /* for insertion in the list of templates */
33 int cid; /* chain id */
34 enum vcap_keyfield_set orig; /* keyset used before the template */
35 enum vcap_keyfield_set keyset; /* new keyset used by template */
36 u16 l3_proto; /* protocol specified in the template */
37 };
38
39 static int
sparx5_tc_flower_es0_tpid(struct vcap_tc_flower_parse_usage * st)40 sparx5_tc_flower_es0_tpid(struct vcap_tc_flower_parse_usage *st)
41 {
42 int err = 0;
43
44 switch (st->tpid) {
45 case ETH_P_8021Q:
46 err = vcap_rule_add_key_u32(st->vrule,
47 VCAP_KF_8021Q_TPID,
48 SPX5_TPID_SEL_8100, ~0);
49 break;
50 case ETH_P_8021AD:
51 err = vcap_rule_add_key_u32(st->vrule,
52 VCAP_KF_8021Q_TPID,
53 SPX5_TPID_SEL_88A8, ~0);
54 break;
55 default:
56 NL_SET_ERR_MSG_MOD(st->fco->common.extack,
57 "Invalid vlan proto");
58 err = -EINVAL;
59 break;
60 }
61 return err;
62 }
63
64 static int
sparx5_tc_flower_handler_basic_usage(struct vcap_tc_flower_parse_usage * st)65 sparx5_tc_flower_handler_basic_usage(struct vcap_tc_flower_parse_usage *st)
66 {
67 struct flow_match_basic mt;
68 int err = 0;
69
70 flow_rule_match_basic(st->frule, &mt);
71
72 if (mt.mask->n_proto) {
73 st->l3_proto = be16_to_cpu(mt.key->n_proto);
74 if (!sparx5_vcap_is_known_etype(st->admin, st->l3_proto)) {
75 err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_ETYPE,
76 st->l3_proto, ~0);
77 if (err)
78 goto out;
79 } else if (st->l3_proto == ETH_P_IP) {
80 err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_IP4_IS,
81 VCAP_BIT_1);
82 if (err)
83 goto out;
84 } else if (st->l3_proto == ETH_P_IPV6) {
85 err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_IP4_IS,
86 VCAP_BIT_0);
87 if (err)
88 goto out;
89 if (st->admin->vtype == VCAP_TYPE_IS0) {
90 err = vcap_rule_add_key_bit(st->vrule,
91 VCAP_KF_IP_SNAP_IS,
92 VCAP_BIT_1);
93 if (err)
94 goto out;
95 }
96 }
97 }
98
99 if (mt.mask->ip_proto) {
100 st->l4_proto = mt.key->ip_proto;
101 if (st->l4_proto == IPPROTO_TCP) {
102 err = vcap_rule_add_key_bit(st->vrule,
103 VCAP_KF_TCP_IS,
104 VCAP_BIT_1);
105 if (err)
106 goto out;
107 } else if (st->l4_proto == IPPROTO_UDP) {
108 err = vcap_rule_add_key_bit(st->vrule,
109 VCAP_KF_TCP_IS,
110 VCAP_BIT_0);
111 if (err)
112 goto out;
113 if (st->admin->vtype == VCAP_TYPE_IS0) {
114 err = vcap_rule_add_key_bit(st->vrule,
115 VCAP_KF_TCP_UDP_IS,
116 VCAP_BIT_1);
117 if (err)
118 goto out;
119 }
120 } else {
121 err = vcap_rule_add_key_u32(st->vrule,
122 VCAP_KF_L3_IP_PROTO,
123 st->l4_proto, ~0);
124 if (err)
125 goto out;
126 }
127 }
128
129 st->used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
130
131 return err;
132
133 out:
134 NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ip_proto parse error");
135 return err;
136 }
137
138 static int
sparx5_tc_flower_handler_control_usage(struct vcap_tc_flower_parse_usage * st)139 sparx5_tc_flower_handler_control_usage(struct vcap_tc_flower_parse_usage *st)
140 {
141 struct flow_match_control mt;
142 u32 value, mask;
143 int err = 0;
144
145 flow_rule_match_control(st->frule, &mt);
146
147 if (mt.mask->flags) {
148 if (mt.mask->flags & FLOW_DIS_FIRST_FRAG) {
149 if (mt.key->flags & FLOW_DIS_FIRST_FRAG) {
150 value = 1; /* initial fragment */
151 mask = 0x3;
152 } else {
153 if (mt.mask->flags & FLOW_DIS_IS_FRAGMENT) {
154 value = 3; /* follow up fragment */
155 mask = 0x3;
156 } else {
157 value = 0; /* no fragment */
158 mask = 0x3;
159 }
160 }
161 } else {
162 if (mt.mask->flags & FLOW_DIS_IS_FRAGMENT) {
163 value = 3; /* follow up fragment */
164 mask = 0x3;
165 } else {
166 value = 0; /* no fragment */
167 mask = 0x3;
168 }
169 }
170
171 err = vcap_rule_add_key_u32(st->vrule,
172 VCAP_KF_L3_FRAGMENT_TYPE,
173 value, mask);
174 if (err)
175 goto out;
176 }
177
178 st->used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL);
179
180 return err;
181
182 out:
183 NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ip_frag parse error");
184 return err;
185 }
186
187 static int
sparx5_tc_flower_handler_cvlan_usage(struct vcap_tc_flower_parse_usage * st)188 sparx5_tc_flower_handler_cvlan_usage(struct vcap_tc_flower_parse_usage *st)
189 {
190 if (st->admin->vtype != VCAP_TYPE_IS0) {
191 NL_SET_ERR_MSG_MOD(st->fco->common.extack,
192 "cvlan not supported in this VCAP");
193 return -EINVAL;
194 }
195
196 return vcap_tc_flower_handler_cvlan_usage(st);
197 }
198
199 static int
sparx5_tc_flower_handler_vlan_usage(struct vcap_tc_flower_parse_usage * st)200 sparx5_tc_flower_handler_vlan_usage(struct vcap_tc_flower_parse_usage *st)
201 {
202 enum vcap_key_field vid_key = VCAP_KF_8021Q_VID_CLS;
203 enum vcap_key_field pcp_key = VCAP_KF_8021Q_PCP_CLS;
204 int err;
205
206 if (st->admin->vtype == VCAP_TYPE_IS0) {
207 vid_key = VCAP_KF_8021Q_VID0;
208 pcp_key = VCAP_KF_8021Q_PCP0;
209 }
210
211 err = vcap_tc_flower_handler_vlan_usage(st, vid_key, pcp_key);
212 if (err)
213 return err;
214
215 if (st->admin->vtype == VCAP_TYPE_ES0 && st->tpid)
216 err = sparx5_tc_flower_es0_tpid(st);
217
218 return err;
219 }
220
221 static int (*sparx5_tc_flower_usage_handlers[])(struct vcap_tc_flower_parse_usage *st) = {
222 [FLOW_DISSECTOR_KEY_ETH_ADDRS] = vcap_tc_flower_handler_ethaddr_usage,
223 [FLOW_DISSECTOR_KEY_IPV4_ADDRS] = vcap_tc_flower_handler_ipv4_usage,
224 [FLOW_DISSECTOR_KEY_IPV6_ADDRS] = vcap_tc_flower_handler_ipv6_usage,
225 [FLOW_DISSECTOR_KEY_CONTROL] = sparx5_tc_flower_handler_control_usage,
226 [FLOW_DISSECTOR_KEY_PORTS] = vcap_tc_flower_handler_portnum_usage,
227 [FLOW_DISSECTOR_KEY_BASIC] = sparx5_tc_flower_handler_basic_usage,
228 [FLOW_DISSECTOR_KEY_CVLAN] = sparx5_tc_flower_handler_cvlan_usage,
229 [FLOW_DISSECTOR_KEY_VLAN] = sparx5_tc_flower_handler_vlan_usage,
230 [FLOW_DISSECTOR_KEY_TCP] = vcap_tc_flower_handler_tcp_usage,
231 [FLOW_DISSECTOR_KEY_ARP] = vcap_tc_flower_handler_arp_usage,
232 [FLOW_DISSECTOR_KEY_IP] = vcap_tc_flower_handler_ip_usage,
233 };
234
sparx5_tc_use_dissectors(struct vcap_tc_flower_parse_usage * st,struct vcap_admin * admin,struct vcap_rule * vrule)235 static int sparx5_tc_use_dissectors(struct vcap_tc_flower_parse_usage *st,
236 struct vcap_admin *admin,
237 struct vcap_rule *vrule)
238 {
239 int idx, err = 0;
240
241 for (idx = 0; idx < ARRAY_SIZE(sparx5_tc_flower_usage_handlers); ++idx) {
242 if (!flow_rule_match_key(st->frule, idx))
243 continue;
244 if (!sparx5_tc_flower_usage_handlers[idx])
245 continue;
246 err = sparx5_tc_flower_usage_handlers[idx](st);
247 if (err)
248 return err;
249 }
250
251 if (st->frule->match.dissector->used_keys ^ st->used_keys) {
252 NL_SET_ERR_MSG_MOD(st->fco->common.extack,
253 "Unsupported match item");
254 return -ENOENT;
255 }
256
257 return err;
258 }
259
sparx5_tc_flower_action_check(struct vcap_control * vctrl,struct net_device * ndev,struct flow_cls_offload * fco,bool ingress)260 static int sparx5_tc_flower_action_check(struct vcap_control *vctrl,
261 struct net_device *ndev,
262 struct flow_cls_offload *fco,
263 bool ingress)
264 {
265 struct flow_rule *rule = flow_cls_offload_flow_rule(fco);
266 struct flow_action_entry *actent, *last_actent = NULL;
267 struct flow_action *act = &rule->action;
268 u64 action_mask = 0;
269 int idx;
270
271 if (!flow_action_has_entries(act)) {
272 NL_SET_ERR_MSG_MOD(fco->common.extack, "No actions");
273 return -EINVAL;
274 }
275
276 if (!flow_action_basic_hw_stats_check(act, fco->common.extack))
277 return -EOPNOTSUPP;
278
279 flow_action_for_each(idx, actent, act) {
280 if (action_mask & BIT(actent->id)) {
281 NL_SET_ERR_MSG_MOD(fco->common.extack,
282 "More actions of the same type");
283 return -EINVAL;
284 }
285 action_mask |= BIT(actent->id);
286 last_actent = actent; /* Save last action for later check */
287 }
288
289 /* Check if last action is a goto
290 * The last chain/lookup does not need to have a goto action
291 */
292 if (last_actent->id == FLOW_ACTION_GOTO) {
293 /* Check if the destination chain is in one of the VCAPs */
294 if (!vcap_is_next_lookup(vctrl, fco->common.chain_index,
295 last_actent->chain_index)) {
296 NL_SET_ERR_MSG_MOD(fco->common.extack,
297 "Invalid goto chain");
298 return -EINVAL;
299 }
300 } else if (!vcap_is_last_chain(vctrl, fco->common.chain_index,
301 ingress)) {
302 NL_SET_ERR_MSG_MOD(fco->common.extack,
303 "Last action must be 'goto'");
304 return -EINVAL;
305 }
306
307 /* Catch unsupported combinations of actions */
308 if (action_mask & BIT(FLOW_ACTION_TRAP) &&
309 action_mask & BIT(FLOW_ACTION_ACCEPT)) {
310 NL_SET_ERR_MSG_MOD(fco->common.extack,
311 "Cannot combine pass and trap action");
312 return -EOPNOTSUPP;
313 }
314
315 if (action_mask & BIT(FLOW_ACTION_VLAN_PUSH) &&
316 action_mask & BIT(FLOW_ACTION_VLAN_POP)) {
317 NL_SET_ERR_MSG_MOD(fco->common.extack,
318 "Cannot combine vlan push and pop action");
319 return -EOPNOTSUPP;
320 }
321
322 if (action_mask & BIT(FLOW_ACTION_VLAN_PUSH) &&
323 action_mask & BIT(FLOW_ACTION_VLAN_MANGLE)) {
324 NL_SET_ERR_MSG_MOD(fco->common.extack,
325 "Cannot combine vlan push and modify action");
326 return -EOPNOTSUPP;
327 }
328
329 if (action_mask & BIT(FLOW_ACTION_VLAN_POP) &&
330 action_mask & BIT(FLOW_ACTION_VLAN_MANGLE)) {
331 NL_SET_ERR_MSG_MOD(fco->common.extack,
332 "Cannot combine vlan pop and modify action");
333 return -EOPNOTSUPP;
334 }
335
336 return 0;
337 }
338
339 /* Add a rule counter action */
sparx5_tc_add_rule_counter(struct vcap_admin * admin,struct vcap_rule * vrule)340 static int sparx5_tc_add_rule_counter(struct vcap_admin *admin,
341 struct vcap_rule *vrule)
342 {
343 int err;
344
345 switch (admin->vtype) {
346 case VCAP_TYPE_IS0:
347 break;
348 case VCAP_TYPE_ES0:
349 err = vcap_rule_mod_action_u32(vrule, VCAP_AF_ESDX,
350 vrule->id);
351 if (err)
352 return err;
353 vcap_rule_set_counter_id(vrule, vrule->id);
354 break;
355 case VCAP_TYPE_IS2:
356 case VCAP_TYPE_ES2:
357 err = vcap_rule_mod_action_u32(vrule, VCAP_AF_CNT_ID,
358 vrule->id);
359 if (err)
360 return err;
361 vcap_rule_set_counter_id(vrule, vrule->id);
362 break;
363 default:
364 pr_err("%s:%d: vcap type: %d not supported\n",
365 __func__, __LINE__, admin->vtype);
366 break;
367 }
368 return 0;
369 }
370
371 /* Collect all port keysets and apply the first of them, possibly wildcarded */
sparx5_tc_select_protocol_keyset(struct net_device * ndev,struct vcap_rule * vrule,struct vcap_admin * admin,u16 l3_proto,struct sparx5_multiple_rules * multi)372 static int sparx5_tc_select_protocol_keyset(struct net_device *ndev,
373 struct vcap_rule *vrule,
374 struct vcap_admin *admin,
375 u16 l3_proto,
376 struct sparx5_multiple_rules *multi)
377 {
378 struct sparx5_port *port = netdev_priv(ndev);
379 struct vcap_keyset_list portkeysetlist = {};
380 enum vcap_keyfield_set portkeysets[10] = {};
381 struct vcap_keyset_list matches = {};
382 enum vcap_keyfield_set keysets[10];
383 int idx, jdx, err = 0, count = 0;
384 struct sparx5_wildcard_rule *mru;
385 const struct vcap_set *kinfo;
386 struct vcap_control *vctrl;
387
388 vctrl = port->sparx5->vcap_ctrl;
389
390 /* Find the keysets that the rule can use */
391 matches.keysets = keysets;
392 matches.max = ARRAY_SIZE(keysets);
393 if (!vcap_rule_find_keysets(vrule, &matches))
394 return -EINVAL;
395
396 /* Find the keysets that the port configuration supports */
397 portkeysetlist.max = ARRAY_SIZE(portkeysets);
398 portkeysetlist.keysets = portkeysets;
399 err = sparx5_vcap_get_port_keyset(ndev,
400 admin, vrule->vcap_chain_id,
401 l3_proto,
402 &portkeysetlist);
403 if (err)
404 return err;
405
406 /* Find the intersection of the two sets of keyset */
407 for (idx = 0; idx < portkeysetlist.cnt; ++idx) {
408 kinfo = vcap_keyfieldset(vctrl, admin->vtype,
409 portkeysetlist.keysets[idx]);
410 if (!kinfo)
411 continue;
412
413 /* Find a port keyset that matches the required keys
414 * If there are multiple keysets then compose a type id mask
415 */
416 for (jdx = 0; jdx < matches.cnt; ++jdx) {
417 if (portkeysetlist.keysets[idx] != matches.keysets[jdx])
418 continue;
419
420 mru = &multi->rule[kinfo->sw_per_item];
421 if (!mru->selected) {
422 mru->selected = true;
423 mru->keyset = portkeysetlist.keysets[idx];
424 mru->value = kinfo->type_id;
425 }
426 mru->value &= kinfo->type_id;
427 mru->mask |= kinfo->type_id;
428 ++count;
429 }
430 }
431 if (count == 0)
432 return -EPROTO;
433
434 if (l3_proto == ETH_P_ALL && count < portkeysetlist.cnt)
435 return -ENOENT;
436
437 for (idx = 0; idx < SPX5_MAX_RULE_SIZE; ++idx) {
438 mru = &multi->rule[idx];
439 if (!mru->selected)
440 continue;
441
442 /* Align the mask to the combined value */
443 mru->mask ^= mru->value;
444 }
445
446 /* Set the chosen keyset on the rule and set a wildcarded type if there
447 * are more than one keyset
448 */
449 for (idx = 0; idx < SPX5_MAX_RULE_SIZE; ++idx) {
450 mru = &multi->rule[idx];
451 if (!mru->selected)
452 continue;
453
454 vcap_set_rule_set_keyset(vrule, mru->keyset);
455 if (count > 1)
456 /* Some keysets do not have a type field */
457 vcap_rule_mod_key_u32(vrule, VCAP_KF_TYPE,
458 mru->value,
459 ~mru->mask);
460 mru->selected = false; /* mark as done */
461 break; /* Stop here and add more rules later */
462 }
463 return err;
464 }
465
sparx5_tc_add_rule_copy(struct vcap_control * vctrl,struct flow_cls_offload * fco,struct vcap_rule * erule,struct vcap_admin * admin,struct sparx5_wildcard_rule * rule)466 static int sparx5_tc_add_rule_copy(struct vcap_control *vctrl,
467 struct flow_cls_offload *fco,
468 struct vcap_rule *erule,
469 struct vcap_admin *admin,
470 struct sparx5_wildcard_rule *rule)
471 {
472 enum vcap_key_field keylist[] = {
473 VCAP_KF_IF_IGR_PORT_MASK,
474 VCAP_KF_IF_IGR_PORT_MASK_SEL,
475 VCAP_KF_IF_IGR_PORT_MASK_RNG,
476 VCAP_KF_LOOKUP_FIRST_IS,
477 VCAP_KF_TYPE,
478 };
479 struct vcap_rule *vrule;
480 int err;
481
482 /* Add an extra rule with a special user and the new keyset */
483 erule->user = VCAP_USER_TC_EXTRA;
484 vrule = vcap_copy_rule(erule);
485 if (IS_ERR(vrule))
486 return PTR_ERR(vrule);
487
488 /* Link the new rule to the existing rule with the cookie */
489 vrule->cookie = erule->cookie;
490 vcap_filter_rule_keys(vrule, keylist, ARRAY_SIZE(keylist), true);
491 err = vcap_set_rule_set_keyset(vrule, rule->keyset);
492 if (err) {
493 pr_err("%s:%d: could not set keyset %s in rule: %u\n",
494 __func__, __LINE__,
495 vcap_keyset_name(vctrl, rule->keyset),
496 vrule->id);
497 goto out;
498 }
499
500 /* Some keysets do not have a type field, so ignore return value */
501 vcap_rule_mod_key_u32(vrule, VCAP_KF_TYPE, rule->value, ~rule->mask);
502
503 err = vcap_set_rule_set_actionset(vrule, erule->actionset);
504 if (err)
505 goto out;
506
507 err = sparx5_tc_add_rule_counter(admin, vrule);
508 if (err)
509 goto out;
510
511 err = vcap_val_rule(vrule, ETH_P_ALL);
512 if (err) {
513 pr_err("%s:%d: could not validate rule: %u\n",
514 __func__, __LINE__, vrule->id);
515 vcap_set_tc_exterr(fco, vrule);
516 goto out;
517 }
518 err = vcap_add_rule(vrule);
519 if (err) {
520 pr_err("%s:%d: could not add rule: %u\n",
521 __func__, __LINE__, vrule->id);
522 goto out;
523 }
524 out:
525 vcap_free_rule(vrule);
526 return err;
527 }
528
sparx5_tc_add_remaining_rules(struct vcap_control * vctrl,struct flow_cls_offload * fco,struct vcap_rule * erule,struct vcap_admin * admin,struct sparx5_multiple_rules * multi)529 static int sparx5_tc_add_remaining_rules(struct vcap_control *vctrl,
530 struct flow_cls_offload *fco,
531 struct vcap_rule *erule,
532 struct vcap_admin *admin,
533 struct sparx5_multiple_rules *multi)
534 {
535 int idx, err = 0;
536
537 for (idx = 0; idx < SPX5_MAX_RULE_SIZE; ++idx) {
538 if (!multi->rule[idx].selected)
539 continue;
540
541 err = sparx5_tc_add_rule_copy(vctrl, fco, erule, admin,
542 &multi->rule[idx]);
543 if (err)
544 break;
545 }
546 return err;
547 }
548
549 /* Add the actionset that is the default for the VCAP type */
sparx5_tc_set_actionset(struct vcap_admin * admin,struct vcap_rule * vrule)550 static int sparx5_tc_set_actionset(struct vcap_admin *admin,
551 struct vcap_rule *vrule)
552 {
553 enum vcap_actionfield_set aset;
554 int err = 0;
555
556 switch (admin->vtype) {
557 case VCAP_TYPE_IS0:
558 aset = VCAP_AFS_CLASSIFICATION;
559 break;
560 case VCAP_TYPE_IS2:
561 aset = VCAP_AFS_BASE_TYPE;
562 break;
563 case VCAP_TYPE_ES0:
564 aset = VCAP_AFS_ES0;
565 break;
566 case VCAP_TYPE_ES2:
567 aset = VCAP_AFS_BASE_TYPE;
568 break;
569 default:
570 pr_err("%s:%d: %s\n", __func__, __LINE__, "Invalid VCAP type");
571 return -EINVAL;
572 }
573 /* Do not overwrite any current actionset */
574 if (vrule->actionset == VCAP_AFS_NO_VALUE)
575 err = vcap_set_rule_set_actionset(vrule, aset);
576 return err;
577 }
578
579 /* Add the VCAP key to match on for a rule target value */
sparx5_tc_add_rule_link_target(struct vcap_admin * admin,struct vcap_rule * vrule,int target_cid)580 static int sparx5_tc_add_rule_link_target(struct vcap_admin *admin,
581 struct vcap_rule *vrule,
582 int target_cid)
583 {
584 int link_val = target_cid % VCAP_CID_LOOKUP_SIZE;
585 int err;
586
587 if (!link_val)
588 return 0;
589
590 switch (admin->vtype) {
591 case VCAP_TYPE_IS0:
592 /* Add NXT_IDX key for chaining rules between IS0 instances */
593 err = vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_GEN_IDX_SEL,
594 1, /* enable */
595 ~0);
596 if (err)
597 return err;
598 return vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_GEN_IDX,
599 link_val, /* target */
600 ~0);
601 case VCAP_TYPE_IS2:
602 /* Add PAG key for chaining rules from IS0 */
603 return vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_PAG,
604 link_val, /* target */
605 ~0);
606 case VCAP_TYPE_ES0:
607 case VCAP_TYPE_ES2:
608 /* Add ISDX key for chaining rules from IS0 */
609 return vcap_rule_add_key_u32(vrule, VCAP_KF_ISDX_CLS, link_val,
610 ~0);
611 default:
612 break;
613 }
614 return 0;
615 }
616
617 /* Add the VCAP action that adds a target value to a rule */
sparx5_tc_add_rule_link(struct vcap_control * vctrl,struct vcap_admin * admin,struct vcap_rule * vrule,int from_cid,int to_cid)618 static int sparx5_tc_add_rule_link(struct vcap_control *vctrl,
619 struct vcap_admin *admin,
620 struct vcap_rule *vrule,
621 int from_cid, int to_cid)
622 {
623 struct vcap_admin *to_admin = vcap_find_admin(vctrl, to_cid);
624 int diff, err = 0;
625
626 if (!to_admin) {
627 pr_err("%s:%d: unsupported chain direction: %d\n",
628 __func__, __LINE__, to_cid);
629 return -EINVAL;
630 }
631
632 diff = vcap_chain_offset(vctrl, from_cid, to_cid);
633 if (!diff)
634 return 0;
635
636 if (admin->vtype == VCAP_TYPE_IS0 &&
637 to_admin->vtype == VCAP_TYPE_IS0) {
638 /* Between IS0 instances the G_IDX value is used */
639 err = vcap_rule_add_action_u32(vrule, VCAP_AF_NXT_IDX, diff);
640 if (err)
641 goto out;
642 err = vcap_rule_add_action_u32(vrule, VCAP_AF_NXT_IDX_CTRL,
643 1); /* Replace */
644 if (err)
645 goto out;
646 } else if (admin->vtype == VCAP_TYPE_IS0 &&
647 to_admin->vtype == VCAP_TYPE_IS2) {
648 /* Between IS0 and IS2 the PAG value is used */
649 err = vcap_rule_add_action_u32(vrule, VCAP_AF_PAG_VAL, diff);
650 if (err)
651 goto out;
652 err = vcap_rule_add_action_u32(vrule,
653 VCAP_AF_PAG_OVERRIDE_MASK,
654 0xff);
655 if (err)
656 goto out;
657 } else if (admin->vtype == VCAP_TYPE_IS0 &&
658 (to_admin->vtype == VCAP_TYPE_ES0 ||
659 to_admin->vtype == VCAP_TYPE_ES2)) {
660 /* Between IS0 and ES0/ES2 the ISDX value is used */
661 err = vcap_rule_add_action_u32(vrule, VCAP_AF_ISDX_VAL,
662 diff);
663 if (err)
664 goto out;
665 err = vcap_rule_add_action_bit(vrule,
666 VCAP_AF_ISDX_ADD_REPLACE_SEL,
667 VCAP_BIT_1);
668 if (err)
669 goto out;
670 } else {
671 pr_err("%s:%d: unsupported chain destination: %d\n",
672 __func__, __LINE__, to_cid);
673 err = -EOPNOTSUPP;
674 }
675 out:
676 return err;
677 }
678
sparx5_tc_flower_parse_act_gate(struct sparx5_psfp_sg * sg,struct flow_action_entry * act,struct netlink_ext_ack * extack)679 static int sparx5_tc_flower_parse_act_gate(struct sparx5_psfp_sg *sg,
680 struct flow_action_entry *act,
681 struct netlink_ext_ack *extack)
682 {
683 int i;
684
685 if (act->gate.prio < -1 || act->gate.prio > SPX5_PSFP_SG_MAX_IPV) {
686 NL_SET_ERR_MSG_MOD(extack, "Invalid gate priority");
687 return -EINVAL;
688 }
689
690 if (act->gate.cycletime < SPX5_PSFP_SG_MIN_CYCLE_TIME_NS ||
691 act->gate.cycletime > SPX5_PSFP_SG_MAX_CYCLE_TIME_NS) {
692 NL_SET_ERR_MSG_MOD(extack, "Invalid gate cycletime");
693 return -EINVAL;
694 }
695
696 if (act->gate.cycletimeext > SPX5_PSFP_SG_MAX_CYCLE_TIME_NS) {
697 NL_SET_ERR_MSG_MOD(extack, "Invalid gate cycletimeext");
698 return -EINVAL;
699 }
700
701 if (act->gate.num_entries >= SPX5_PSFP_GCE_CNT) {
702 NL_SET_ERR_MSG_MOD(extack, "Invalid number of gate entries");
703 return -EINVAL;
704 }
705
706 sg->gate_state = true;
707 sg->ipv = act->gate.prio;
708 sg->num_entries = act->gate.num_entries;
709 sg->cycletime = act->gate.cycletime;
710 sg->cycletimeext = act->gate.cycletimeext;
711
712 for (i = 0; i < sg->num_entries; i++) {
713 sg->gce[i].gate_state = !!act->gate.entries[i].gate_state;
714 sg->gce[i].interval = act->gate.entries[i].interval;
715 sg->gce[i].ipv = act->gate.entries[i].ipv;
716 sg->gce[i].maxoctets = act->gate.entries[i].maxoctets;
717 }
718
719 return 0;
720 }
721
sparx5_tc_flower_parse_act_police(struct sparx5_policer * pol,struct flow_action_entry * act,struct netlink_ext_ack * extack)722 static int sparx5_tc_flower_parse_act_police(struct sparx5_policer *pol,
723 struct flow_action_entry *act,
724 struct netlink_ext_ack *extack)
725 {
726 pol->type = SPX5_POL_SERVICE;
727 pol->rate = div_u64(act->police.rate_bytes_ps, 1000) * 8;
728 pol->burst = act->police.burst;
729 pol->idx = act->hw_index;
730
731 /* rate is now in kbit */
732 if (pol->rate > DIV_ROUND_UP(SPX5_SDLB_GROUP_RATE_MAX, 1000)) {
733 NL_SET_ERR_MSG_MOD(extack, "Maximum rate exceeded");
734 return -EINVAL;
735 }
736
737 if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
738 NL_SET_ERR_MSG_MOD(extack, "Offload not supported when exceed action is not drop");
739 return -EOPNOTSUPP;
740 }
741
742 if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
743 act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
744 NL_SET_ERR_MSG_MOD(extack, "Offload not supported when conform action is not pipe or ok");
745 return -EOPNOTSUPP;
746 }
747
748 return 0;
749 }
750
sparx5_tc_flower_psfp_setup(struct sparx5 * sparx5,struct vcap_rule * vrule,int sg_idx,int pol_idx,struct sparx5_psfp_sg * sg,struct sparx5_psfp_fm * fm,struct sparx5_psfp_sf * sf)751 static int sparx5_tc_flower_psfp_setup(struct sparx5 *sparx5,
752 struct vcap_rule *vrule, int sg_idx,
753 int pol_idx, struct sparx5_psfp_sg *sg,
754 struct sparx5_psfp_fm *fm,
755 struct sparx5_psfp_sf *sf)
756 {
757 u32 psfp_sfid = 0, psfp_fmid = 0, psfp_sgid = 0;
758 int ret;
759
760 /* Must always have a stream gate - max sdu (filter option) is evaluated
761 * after frames have passed the gate, so in case of only a policer, we
762 * allocate a stream gate that is always open.
763 */
764 if (sg_idx < 0) {
765 sg_idx = sparx5_pool_idx_to_id(SPX5_PSFP_SG_OPEN);
766 sg->ipv = 0; /* Disabled */
767 sg->cycletime = SPX5_PSFP_SG_CYCLE_TIME_DEFAULT;
768 sg->num_entries = 1;
769 sg->gate_state = 1; /* Open */
770 sg->gate_enabled = 1;
771 sg->gce[0].gate_state = 1;
772 sg->gce[0].interval = SPX5_PSFP_SG_CYCLE_TIME_DEFAULT;
773 sg->gce[0].ipv = 0;
774 sg->gce[0].maxoctets = 0; /* Disabled */
775 }
776
777 ret = sparx5_psfp_sg_add(sparx5, sg_idx, sg, &psfp_sgid);
778 if (ret < 0)
779 return ret;
780
781 if (pol_idx >= 0) {
782 /* Add new flow-meter */
783 ret = sparx5_psfp_fm_add(sparx5, pol_idx, fm, &psfp_fmid);
784 if (ret < 0)
785 return ret;
786 }
787
788 /* Map stream filter to stream gate */
789 sf->sgid = psfp_sgid;
790
791 /* Add new stream-filter and map it to a steam gate */
792 ret = sparx5_psfp_sf_add(sparx5, sf, &psfp_sfid);
793 if (ret < 0)
794 return ret;
795
796 /* Streams are classified by ISDX - map ISDX 1:1 to sfid for now. */
797 sparx5_isdx_conf_set(sparx5, psfp_sfid, psfp_sfid, psfp_fmid);
798
799 ret = vcap_rule_add_action_bit(vrule, VCAP_AF_ISDX_ADD_REPLACE_SEL,
800 VCAP_BIT_1);
801 if (ret)
802 return ret;
803
804 ret = vcap_rule_add_action_u32(vrule, VCAP_AF_ISDX_VAL, psfp_sfid);
805 if (ret)
806 return ret;
807
808 return 0;
809 }
810
811 /* Handle the action trap for a VCAP rule */
sparx5_tc_action_trap(struct vcap_admin * admin,struct vcap_rule * vrule,struct flow_cls_offload * fco)812 static int sparx5_tc_action_trap(struct vcap_admin *admin,
813 struct vcap_rule *vrule,
814 struct flow_cls_offload *fco)
815 {
816 int err = 0;
817
818 switch (admin->vtype) {
819 case VCAP_TYPE_IS2:
820 err = vcap_rule_add_action_bit(vrule,
821 VCAP_AF_CPU_COPY_ENA,
822 VCAP_BIT_1);
823 if (err)
824 break;
825 err = vcap_rule_add_action_u32(vrule,
826 VCAP_AF_CPU_QUEUE_NUM, 0);
827 if (err)
828 break;
829 err = vcap_rule_add_action_u32(vrule,
830 VCAP_AF_MASK_MODE,
831 SPX5_PMM_REPLACE_ALL);
832 break;
833 case VCAP_TYPE_ES0:
834 err = vcap_rule_add_action_u32(vrule,
835 VCAP_AF_FWD_SEL,
836 SPX5_FWSEL_REDIRECT_TO_LOOPBACK);
837 break;
838 case VCAP_TYPE_ES2:
839 err = vcap_rule_add_action_bit(vrule,
840 VCAP_AF_CPU_COPY_ENA,
841 VCAP_BIT_1);
842 if (err)
843 break;
844 err = vcap_rule_add_action_u32(vrule,
845 VCAP_AF_CPU_QUEUE_NUM, 0);
846 break;
847 default:
848 NL_SET_ERR_MSG_MOD(fco->common.extack,
849 "Trap action not supported in this VCAP");
850 err = -EOPNOTSUPP;
851 break;
852 }
853 return err;
854 }
855
sparx5_tc_action_vlan_pop(struct vcap_admin * admin,struct vcap_rule * vrule,struct flow_cls_offload * fco,u16 tpid)856 static int sparx5_tc_action_vlan_pop(struct vcap_admin *admin,
857 struct vcap_rule *vrule,
858 struct flow_cls_offload *fco,
859 u16 tpid)
860 {
861 int err = 0;
862
863 switch (admin->vtype) {
864 case VCAP_TYPE_ES0:
865 break;
866 default:
867 NL_SET_ERR_MSG_MOD(fco->common.extack,
868 "VLAN pop action not supported in this VCAP");
869 return -EOPNOTSUPP;
870 }
871
872 switch (tpid) {
873 case ETH_P_8021Q:
874 case ETH_P_8021AD:
875 err = vcap_rule_add_action_u32(vrule,
876 VCAP_AF_PUSH_OUTER_TAG,
877 SPX5_OTAG_UNTAG);
878 break;
879 default:
880 NL_SET_ERR_MSG_MOD(fco->common.extack,
881 "Invalid vlan proto");
882 err = -EINVAL;
883 }
884 return err;
885 }
886
sparx5_tc_action_vlan_modify(struct vcap_admin * admin,struct vcap_rule * vrule,struct flow_cls_offload * fco,struct flow_action_entry * act,u16 tpid)887 static int sparx5_tc_action_vlan_modify(struct vcap_admin *admin,
888 struct vcap_rule *vrule,
889 struct flow_cls_offload *fco,
890 struct flow_action_entry *act,
891 u16 tpid)
892 {
893 int err = 0;
894
895 switch (admin->vtype) {
896 case VCAP_TYPE_ES0:
897 err = vcap_rule_add_action_u32(vrule,
898 VCAP_AF_PUSH_OUTER_TAG,
899 SPX5_OTAG_TAG_A);
900 if (err)
901 return err;
902 break;
903 default:
904 NL_SET_ERR_MSG_MOD(fco->common.extack,
905 "VLAN modify action not supported in this VCAP");
906 return -EOPNOTSUPP;
907 }
908
909 switch (tpid) {
910 case ETH_P_8021Q:
911 err = vcap_rule_add_action_u32(vrule,
912 VCAP_AF_TAG_A_TPID_SEL,
913 SPX5_TPID_A_8100);
914 break;
915 case ETH_P_8021AD:
916 err = vcap_rule_add_action_u32(vrule,
917 VCAP_AF_TAG_A_TPID_SEL,
918 SPX5_TPID_A_88A8);
919 break;
920 default:
921 NL_SET_ERR_MSG_MOD(fco->common.extack,
922 "Invalid vlan proto");
923 err = -EINVAL;
924 }
925 if (err)
926 return err;
927
928 err = vcap_rule_add_action_u32(vrule,
929 VCAP_AF_TAG_A_VID_SEL,
930 SPX5_VID_A_VAL);
931 if (err)
932 return err;
933
934 err = vcap_rule_add_action_u32(vrule,
935 VCAP_AF_VID_A_VAL,
936 act->vlan.vid);
937 if (err)
938 return err;
939
940 err = vcap_rule_add_action_u32(vrule,
941 VCAP_AF_TAG_A_PCP_SEL,
942 SPX5_PCP_A_VAL);
943 if (err)
944 return err;
945
946 err = vcap_rule_add_action_u32(vrule,
947 VCAP_AF_PCP_A_VAL,
948 act->vlan.prio);
949 if (err)
950 return err;
951
952 return vcap_rule_add_action_u32(vrule,
953 VCAP_AF_TAG_A_DEI_SEL,
954 SPX5_DEI_A_CLASSIFIED);
955 }
956
sparx5_tc_action_vlan_push(struct vcap_admin * admin,struct vcap_rule * vrule,struct flow_cls_offload * fco,struct flow_action_entry * act,u16 tpid)957 static int sparx5_tc_action_vlan_push(struct vcap_admin *admin,
958 struct vcap_rule *vrule,
959 struct flow_cls_offload *fco,
960 struct flow_action_entry *act,
961 u16 tpid)
962 {
963 u16 act_tpid = be16_to_cpu(act->vlan.proto);
964 int err = 0;
965
966 switch (admin->vtype) {
967 case VCAP_TYPE_ES0:
968 break;
969 default:
970 NL_SET_ERR_MSG_MOD(fco->common.extack,
971 "VLAN push action not supported in this VCAP");
972 return -EOPNOTSUPP;
973 }
974
975 if (tpid == ETH_P_8021AD) {
976 NL_SET_ERR_MSG_MOD(fco->common.extack,
977 "Cannot push on double tagged frames");
978 return -EOPNOTSUPP;
979 }
980
981 err = sparx5_tc_action_vlan_modify(admin, vrule, fco, act, act_tpid);
982 if (err)
983 return err;
984
985 switch (act_tpid) {
986 case ETH_P_8021Q:
987 break;
988 case ETH_P_8021AD:
989 /* Push classified tag as inner tag */
990 err = vcap_rule_add_action_u32(vrule,
991 VCAP_AF_PUSH_INNER_TAG,
992 SPX5_ITAG_PUSH_B_TAG);
993 if (err)
994 break;
995 err = vcap_rule_add_action_u32(vrule,
996 VCAP_AF_TAG_B_TPID_SEL,
997 SPX5_TPID_B_CLASSIFIED);
998 break;
999 default:
1000 NL_SET_ERR_MSG_MOD(fco->common.extack,
1001 "Invalid vlan proto");
1002 err = -EINVAL;
1003 }
1004 return err;
1005 }
1006
1007 /* Remove rule keys that may prevent templates from matching a keyset */
sparx5_tc_flower_simplify_rule(struct vcap_admin * admin,struct vcap_rule * vrule,u16 l3_proto)1008 static void sparx5_tc_flower_simplify_rule(struct vcap_admin *admin,
1009 struct vcap_rule *vrule,
1010 u16 l3_proto)
1011 {
1012 switch (admin->vtype) {
1013 case VCAP_TYPE_IS0:
1014 vcap_rule_rem_key(vrule, VCAP_KF_ETYPE);
1015 switch (l3_proto) {
1016 case ETH_P_IP:
1017 break;
1018 case ETH_P_IPV6:
1019 vcap_rule_rem_key(vrule, VCAP_KF_IP_SNAP_IS);
1020 break;
1021 default:
1022 break;
1023 }
1024 break;
1025 case VCAP_TYPE_ES2:
1026 switch (l3_proto) {
1027 case ETH_P_IP:
1028 if (vrule->keyset == VCAP_KFS_IP4_OTHER)
1029 vcap_rule_rem_key(vrule, VCAP_KF_TCP_IS);
1030 break;
1031 case ETH_P_IPV6:
1032 if (vrule->keyset == VCAP_KFS_IP6_STD)
1033 vcap_rule_rem_key(vrule, VCAP_KF_TCP_IS);
1034 vcap_rule_rem_key(vrule, VCAP_KF_IP4_IS);
1035 break;
1036 default:
1037 break;
1038 }
1039 break;
1040 case VCAP_TYPE_IS2:
1041 switch (l3_proto) {
1042 case ETH_P_IP:
1043 case ETH_P_IPV6:
1044 vcap_rule_rem_key(vrule, VCAP_KF_IP4_IS);
1045 break;
1046 default:
1047 break;
1048 }
1049 break;
1050 default:
1051 break;
1052 }
1053 }
1054
sparx5_tc_flower_use_template(struct net_device * ndev,struct flow_cls_offload * fco,struct vcap_admin * admin,struct vcap_rule * vrule)1055 static bool sparx5_tc_flower_use_template(struct net_device *ndev,
1056 struct flow_cls_offload *fco,
1057 struct vcap_admin *admin,
1058 struct vcap_rule *vrule)
1059 {
1060 struct sparx5_port *port = netdev_priv(ndev);
1061 struct sparx5_tc_flower_template *ftp;
1062
1063 list_for_each_entry(ftp, &port->tc_templates, list) {
1064 if (ftp->cid != fco->common.chain_index)
1065 continue;
1066
1067 vcap_set_rule_set_keyset(vrule, ftp->keyset);
1068 sparx5_tc_flower_simplify_rule(admin, vrule, ftp->l3_proto);
1069 return true;
1070 }
1071 return false;
1072 }
1073
sparx5_tc_flower_replace(struct net_device * ndev,struct flow_cls_offload * fco,struct vcap_admin * admin,bool ingress)1074 static int sparx5_tc_flower_replace(struct net_device *ndev,
1075 struct flow_cls_offload *fco,
1076 struct vcap_admin *admin,
1077 bool ingress)
1078 {
1079 struct sparx5_psfp_sf sf = { .max_sdu = SPX5_PSFP_SF_MAX_SDU };
1080 struct netlink_ext_ack *extack = fco->common.extack;
1081 int err, idx, tc_sg_idx = -1, tc_pol_idx = -1;
1082 struct vcap_tc_flower_parse_usage state = {
1083 .fco = fco,
1084 .l3_proto = ETH_P_ALL,
1085 .admin = admin,
1086 };
1087 struct sparx5_port *port = netdev_priv(ndev);
1088 struct sparx5_multiple_rules multi = {};
1089 struct sparx5 *sparx5 = port->sparx5;
1090 struct sparx5_psfp_sg sg = { 0 };
1091 struct sparx5_psfp_fm fm = { 0 };
1092 struct flow_action_entry *act;
1093 struct vcap_control *vctrl;
1094 struct flow_rule *frule;
1095 struct vcap_rule *vrule;
1096
1097 vctrl = port->sparx5->vcap_ctrl;
1098
1099 err = sparx5_tc_flower_action_check(vctrl, ndev, fco, ingress);
1100 if (err)
1101 return err;
1102
1103 vrule = vcap_alloc_rule(vctrl, ndev, fco->common.chain_index, VCAP_USER_TC,
1104 fco->common.prio, 0);
1105 if (IS_ERR(vrule))
1106 return PTR_ERR(vrule);
1107
1108 vrule->cookie = fco->cookie;
1109
1110 state.vrule = vrule;
1111 state.frule = flow_cls_offload_flow_rule(fco);
1112 err = sparx5_tc_use_dissectors(&state, admin, vrule);
1113 if (err)
1114 goto out;
1115
1116 err = sparx5_tc_add_rule_counter(admin, vrule);
1117 if (err)
1118 goto out;
1119
1120 err = sparx5_tc_add_rule_link_target(admin, vrule,
1121 fco->common.chain_index);
1122 if (err)
1123 goto out;
1124
1125 frule = flow_cls_offload_flow_rule(fco);
1126 flow_action_for_each(idx, act, &frule->action) {
1127 switch (act->id) {
1128 case FLOW_ACTION_GATE: {
1129 err = sparx5_tc_flower_parse_act_gate(&sg, act, extack);
1130 if (err < 0)
1131 goto out;
1132
1133 tc_sg_idx = act->hw_index;
1134
1135 break;
1136 }
1137 case FLOW_ACTION_POLICE: {
1138 err = sparx5_tc_flower_parse_act_police(&fm.pol, act,
1139 extack);
1140 if (err < 0)
1141 goto out;
1142
1143 tc_pol_idx = fm.pol.idx;
1144 sf.max_sdu = act->police.mtu;
1145
1146 break;
1147 }
1148 case FLOW_ACTION_TRAP:
1149 err = sparx5_tc_action_trap(admin, vrule, fco);
1150 if (err)
1151 goto out;
1152 break;
1153 case FLOW_ACTION_ACCEPT:
1154 err = sparx5_tc_set_actionset(admin, vrule);
1155 if (err)
1156 goto out;
1157 break;
1158 case FLOW_ACTION_GOTO:
1159 err = sparx5_tc_set_actionset(admin, vrule);
1160 if (err)
1161 goto out;
1162 sparx5_tc_add_rule_link(vctrl, admin, vrule,
1163 fco->common.chain_index,
1164 act->chain_index);
1165 break;
1166 case FLOW_ACTION_VLAN_POP:
1167 err = sparx5_tc_action_vlan_pop(admin, vrule, fco,
1168 state.tpid);
1169 if (err)
1170 goto out;
1171 break;
1172 case FLOW_ACTION_VLAN_PUSH:
1173 err = sparx5_tc_action_vlan_push(admin, vrule, fco,
1174 act, state.tpid);
1175 if (err)
1176 goto out;
1177 break;
1178 case FLOW_ACTION_VLAN_MANGLE:
1179 err = sparx5_tc_action_vlan_modify(admin, vrule, fco,
1180 act, state.tpid);
1181 if (err)
1182 goto out;
1183 break;
1184 default:
1185 NL_SET_ERR_MSG_MOD(fco->common.extack,
1186 "Unsupported TC action");
1187 err = -EOPNOTSUPP;
1188 goto out;
1189 }
1190 }
1191
1192 /* Setup PSFP */
1193 if (tc_sg_idx >= 0 || tc_pol_idx >= 0) {
1194 err = sparx5_tc_flower_psfp_setup(sparx5, vrule, tc_sg_idx,
1195 tc_pol_idx, &sg, &fm, &sf);
1196 if (err)
1197 goto out;
1198 }
1199
1200 if (!sparx5_tc_flower_use_template(ndev, fco, admin, vrule)) {
1201 err = sparx5_tc_select_protocol_keyset(ndev, vrule, admin,
1202 state.l3_proto, &multi);
1203 if (err) {
1204 NL_SET_ERR_MSG_MOD(fco->common.extack,
1205 "No matching port keyset for filter protocol and keys");
1206 goto out;
1207 }
1208 }
1209
1210 /* provide the l3 protocol to guide the keyset selection */
1211 err = vcap_val_rule(vrule, state.l3_proto);
1212 if (err) {
1213 vcap_set_tc_exterr(fco, vrule);
1214 goto out;
1215 }
1216 err = vcap_add_rule(vrule);
1217 if (err)
1218 NL_SET_ERR_MSG_MOD(fco->common.extack,
1219 "Could not add the filter");
1220
1221 if (state.l3_proto == ETH_P_ALL)
1222 err = sparx5_tc_add_remaining_rules(vctrl, fco, vrule, admin,
1223 &multi);
1224
1225 out:
1226 vcap_free_rule(vrule);
1227 return err;
1228 }
1229
sparx5_tc_free_psfp_resources(struct sparx5 * sparx5,struct vcap_rule * vrule)1230 static void sparx5_tc_free_psfp_resources(struct sparx5 *sparx5,
1231 struct vcap_rule *vrule)
1232 {
1233 struct vcap_client_actionfield *afield;
1234 u32 isdx, sfid, sgid, fmid;
1235
1236 /* Check if VCAP_AF_ISDX_VAL action is set for this rule - and if
1237 * it is used for stream and/or flow-meter classification.
1238 */
1239 afield = vcap_find_actionfield(vrule, VCAP_AF_ISDX_VAL);
1240 if (!afield)
1241 return;
1242
1243 isdx = afield->data.u32.value;
1244 sfid = sparx5_psfp_isdx_get_sf(sparx5, isdx);
1245
1246 if (!sfid)
1247 return;
1248
1249 fmid = sparx5_psfp_isdx_get_fm(sparx5, isdx);
1250 sgid = sparx5_psfp_sf_get_sg(sparx5, sfid);
1251
1252 if (fmid && sparx5_psfp_fm_del(sparx5, fmid) < 0)
1253 pr_err("%s:%d Could not delete invalid fmid: %d", __func__,
1254 __LINE__, fmid);
1255
1256 if (sgid && sparx5_psfp_sg_del(sparx5, sgid) < 0)
1257 pr_err("%s:%d Could not delete invalid sgid: %d", __func__,
1258 __LINE__, sgid);
1259
1260 if (sparx5_psfp_sf_del(sparx5, sfid) < 0)
1261 pr_err("%s:%d Could not delete invalid sfid: %d", __func__,
1262 __LINE__, sfid);
1263
1264 sparx5_isdx_conf_set(sparx5, isdx, 0, 0);
1265 }
1266
sparx5_tc_free_rule_resources(struct net_device * ndev,struct vcap_control * vctrl,int rule_id)1267 static int sparx5_tc_free_rule_resources(struct net_device *ndev,
1268 struct vcap_control *vctrl,
1269 int rule_id)
1270 {
1271 struct sparx5_port *port = netdev_priv(ndev);
1272 struct sparx5 *sparx5 = port->sparx5;
1273 struct vcap_rule *vrule;
1274 int ret = 0;
1275
1276 vrule = vcap_get_rule(vctrl, rule_id);
1277 if (IS_ERR(vrule))
1278 return -EINVAL;
1279
1280 sparx5_tc_free_psfp_resources(sparx5, vrule);
1281
1282 vcap_free_rule(vrule);
1283 return ret;
1284 }
1285
sparx5_tc_flower_destroy(struct net_device * ndev,struct flow_cls_offload * fco,struct vcap_admin * admin)1286 static int sparx5_tc_flower_destroy(struct net_device *ndev,
1287 struct flow_cls_offload *fco,
1288 struct vcap_admin *admin)
1289 {
1290 struct sparx5_port *port = netdev_priv(ndev);
1291 int err = -ENOENT, count = 0, rule_id;
1292 struct vcap_control *vctrl;
1293
1294 vctrl = port->sparx5->vcap_ctrl;
1295 while (true) {
1296 rule_id = vcap_lookup_rule_by_cookie(vctrl, fco->cookie);
1297 if (rule_id <= 0)
1298 break;
1299 if (count == 0) {
1300 /* Resources are attached to the first rule of
1301 * a set of rules. Only works if the rules are
1302 * in the correct order.
1303 */
1304 err = sparx5_tc_free_rule_resources(ndev, vctrl,
1305 rule_id);
1306 if (err)
1307 pr_err("%s:%d: could not free resources %d\n",
1308 __func__, __LINE__, rule_id);
1309 }
1310 err = vcap_del_rule(vctrl, ndev, rule_id);
1311 if (err) {
1312 pr_err("%s:%d: could not delete rule %d\n",
1313 __func__, __LINE__, rule_id);
1314 break;
1315 }
1316 }
1317 return err;
1318 }
1319
sparx5_tc_flower_stats(struct net_device * ndev,struct flow_cls_offload * fco,struct vcap_admin * admin)1320 static int sparx5_tc_flower_stats(struct net_device *ndev,
1321 struct flow_cls_offload *fco,
1322 struct vcap_admin *admin)
1323 {
1324 struct sparx5_port *port = netdev_priv(ndev);
1325 struct vcap_counter ctr = {};
1326 struct vcap_control *vctrl;
1327 ulong lastused = 0;
1328 int err;
1329
1330 vctrl = port->sparx5->vcap_ctrl;
1331 err = vcap_get_rule_count_by_cookie(vctrl, &ctr, fco->cookie);
1332 if (err)
1333 return err;
1334 flow_stats_update(&fco->stats, 0x0, ctr.value, 0, lastused,
1335 FLOW_ACTION_HW_STATS_IMMEDIATE);
1336 return err;
1337 }
1338
sparx5_tc_flower_template_create(struct net_device * ndev,struct flow_cls_offload * fco,struct vcap_admin * admin)1339 static int sparx5_tc_flower_template_create(struct net_device *ndev,
1340 struct flow_cls_offload *fco,
1341 struct vcap_admin *admin)
1342 {
1343 struct sparx5_port *port = netdev_priv(ndev);
1344 struct vcap_tc_flower_parse_usage state = {
1345 .fco = fco,
1346 .l3_proto = ETH_P_ALL,
1347 .admin = admin,
1348 };
1349 struct sparx5_tc_flower_template *ftp;
1350 struct vcap_keyset_list kslist = {};
1351 enum vcap_keyfield_set keysets[10];
1352 struct vcap_control *vctrl;
1353 struct vcap_rule *vrule;
1354 int count, err;
1355
1356 if (admin->vtype == VCAP_TYPE_ES0) {
1357 pr_err("%s:%d: %s\n", __func__, __LINE__,
1358 "VCAP does not support templates");
1359 return -EINVAL;
1360 }
1361
1362 count = vcap_admin_rule_count(admin, fco->common.chain_index);
1363 if (count > 0) {
1364 pr_err("%s:%d: %s\n", __func__, __LINE__,
1365 "Filters are already present");
1366 return -EBUSY;
1367 }
1368
1369 ftp = kzalloc(sizeof(*ftp), GFP_KERNEL);
1370 if (!ftp)
1371 return -ENOMEM;
1372
1373 ftp->cid = fco->common.chain_index;
1374 ftp->orig = VCAP_KFS_NO_VALUE;
1375 ftp->keyset = VCAP_KFS_NO_VALUE;
1376
1377 vctrl = port->sparx5->vcap_ctrl;
1378 vrule = vcap_alloc_rule(vctrl, ndev, fco->common.chain_index,
1379 VCAP_USER_TC, fco->common.prio, 0);
1380 if (IS_ERR(vrule)) {
1381 err = PTR_ERR(vrule);
1382 goto err_rule;
1383 }
1384
1385 state.vrule = vrule;
1386 state.frule = flow_cls_offload_flow_rule(fco);
1387 err = sparx5_tc_use_dissectors(&state, admin, vrule);
1388 if (err) {
1389 pr_err("%s:%d: key error: %d\n", __func__, __LINE__, err);
1390 goto out;
1391 }
1392
1393 ftp->l3_proto = state.l3_proto;
1394
1395 sparx5_tc_flower_simplify_rule(admin, vrule, state.l3_proto);
1396
1397 /* Find the keysets that the rule can use */
1398 kslist.keysets = keysets;
1399 kslist.max = ARRAY_SIZE(keysets);
1400 if (!vcap_rule_find_keysets(vrule, &kslist)) {
1401 pr_err("%s:%d: %s\n", __func__, __LINE__,
1402 "Could not find a suitable keyset");
1403 err = -ENOENT;
1404 goto out;
1405 }
1406
1407 ftp->keyset = vcap_select_min_rule_keyset(vctrl, admin->vtype, &kslist);
1408 kslist.cnt = 0;
1409 sparx5_vcap_set_port_keyset(ndev, admin, fco->common.chain_index,
1410 state.l3_proto,
1411 ftp->keyset,
1412 &kslist);
1413
1414 if (kslist.cnt > 0)
1415 ftp->orig = kslist.keysets[0];
1416
1417 /* Store new template */
1418 list_add_tail(&ftp->list, &port->tc_templates);
1419 vcap_free_rule(vrule);
1420 return 0;
1421
1422 out:
1423 vcap_free_rule(vrule);
1424 err_rule:
1425 kfree(ftp);
1426 return err;
1427 }
1428
sparx5_tc_flower_template_destroy(struct net_device * ndev,struct flow_cls_offload * fco,struct vcap_admin * admin)1429 static int sparx5_tc_flower_template_destroy(struct net_device *ndev,
1430 struct flow_cls_offload *fco,
1431 struct vcap_admin *admin)
1432 {
1433 struct sparx5_port *port = netdev_priv(ndev);
1434 struct sparx5_tc_flower_template *ftp, *tmp;
1435 int err = -ENOENT;
1436
1437 /* Rules using the template are removed by the tc framework */
1438 list_for_each_entry_safe(ftp, tmp, &port->tc_templates, list) {
1439 if (ftp->cid != fco->common.chain_index)
1440 continue;
1441
1442 sparx5_vcap_set_port_keyset(ndev, admin,
1443 fco->common.chain_index,
1444 ftp->l3_proto, ftp->orig,
1445 NULL);
1446 list_del(&ftp->list);
1447 kfree(ftp);
1448 break;
1449 }
1450 return err;
1451 }
1452
sparx5_tc_flower(struct net_device * ndev,struct flow_cls_offload * fco,bool ingress)1453 int sparx5_tc_flower(struct net_device *ndev, struct flow_cls_offload *fco,
1454 bool ingress)
1455 {
1456 struct sparx5_port *port = netdev_priv(ndev);
1457 struct vcap_control *vctrl;
1458 struct vcap_admin *admin;
1459 int err = -EINVAL;
1460
1461 /* Get vcap instance from the chain id */
1462 vctrl = port->sparx5->vcap_ctrl;
1463 admin = vcap_find_admin(vctrl, fco->common.chain_index);
1464 if (!admin) {
1465 NL_SET_ERR_MSG_MOD(fco->common.extack, "Invalid chain");
1466 return err;
1467 }
1468
1469 switch (fco->command) {
1470 case FLOW_CLS_REPLACE:
1471 return sparx5_tc_flower_replace(ndev, fco, admin, ingress);
1472 case FLOW_CLS_DESTROY:
1473 return sparx5_tc_flower_destroy(ndev, fco, admin);
1474 case FLOW_CLS_STATS:
1475 return sparx5_tc_flower_stats(ndev, fco, admin);
1476 case FLOW_CLS_TMPLT_CREATE:
1477 return sparx5_tc_flower_template_create(ndev, fco, admin);
1478 case FLOW_CLS_TMPLT_DESTROY:
1479 return sparx5_tc_flower_template_destroy(ndev, fco, admin);
1480 default:
1481 return -EOPNOTSUPP;
1482 }
1483 }
1484
