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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 */
20struct sparx5_wildcard_rule {
21 bool selected;
22 u8 value;
23 u8 mask;
24 enum vcap_keyfield_set keyset;
25};
26
27struct sparx5_multiple_rules {
28 struct sparx5_wildcard_rule rule[SPX5_MAX_RULE_SIZE];
29};
30
31struct 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/* SparX-5 VCAP fragment types:
40 * 0 = no fragment, 1 = initial fragment,
41 * 2 = suspicious fragment, 3 = valid follow-up fragment
42 */
43enum { /* key / mask */
44 FRAG_NOT = 0x03, /* 0 / 3 */
45 FRAG_SOME = 0x11, /* 1 / 1 */
46 FRAG_FIRST = 0x13, /* 1 / 3 */
47 FRAG_LATER = 0x33, /* 3 / 3 */
48 FRAG_INVAL = 0xff, /* invalid */
49};
50
51/* Flower fragment flag to VCAP fragment type mapping */
52static const u8 sparx5_vcap_frag_map[4][4] = { /* is_frag */
53 { FRAG_INVAL, FRAG_INVAL, FRAG_INVAL, FRAG_FIRST }, /* 0/0 */
54 { FRAG_NOT, FRAG_NOT, FRAG_INVAL, FRAG_INVAL }, /* 0/1 */
55 { FRAG_INVAL, FRAG_INVAL, FRAG_INVAL, FRAG_INVAL }, /* 1/0 */
56 { FRAG_SOME, FRAG_LATER, FRAG_INVAL, FRAG_FIRST } /* 1/1 */
57 /* 0/0 0/1 1/0 1/1 <-- first_frag */
58};
59
60static int
61sparx5_tc_flower_es0_tpid(struct vcap_tc_flower_parse_usage *st)
62{
63 int err = 0;
64
65 switch (st->tpid) {
66 case ETH_P_8021Q:
67 err = vcap_rule_add_key_u32(st->vrule,
68 VCAP_KF_8021Q_TPID,
69 SPX5_TPID_SEL_8100, ~0);
70 break;
71 case ETH_P_8021AD:
72 err = vcap_rule_add_key_u32(st->vrule,
73 VCAP_KF_8021Q_TPID,
74 SPX5_TPID_SEL_88A8, ~0);
75 break;
76 default:
77 NL_SET_ERR_MSG_MOD(st->fco->common.extack,
78 "Invalid vlan proto");
79 err = -EINVAL;
80 break;
81 }
82 return err;
83}
84
85static int
86sparx5_tc_flower_handler_basic_usage(struct vcap_tc_flower_parse_usage *st)
87{
88 struct flow_match_basic mt;
89 int err = 0;
90
91 flow_rule_match_basic(st->frule, &mt);
92
93 if (mt.mask->n_proto) {
94 st->l3_proto = be16_to_cpu(mt.key->n_proto);
95 if (!sparx5_vcap_is_known_etype(st->admin, st->l3_proto)) {
96 err = vcap_rule_add_key_u32(st->vrule, VCAP_KF_ETYPE,
97 st->l3_proto, ~0);
98 if (err)
99 goto out;
100 } else if (st->l3_proto == ETH_P_IP) {
101 err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_IP4_IS,
102 VCAP_BIT_1);
103 if (err)
104 goto out;
105 } else if (st->l3_proto == ETH_P_IPV6) {
106 err = vcap_rule_add_key_bit(st->vrule, VCAP_KF_IP4_IS,
107 VCAP_BIT_0);
108 if (err)
109 goto out;
110 if (st->admin->vtype == VCAP_TYPE_IS0) {
111 err = vcap_rule_add_key_bit(st->vrule,
112 VCAP_KF_IP_SNAP_IS,
113 VCAP_BIT_1);
114 if (err)
115 goto out;
116 }
117 }
118 }
119
120 if (mt.mask->ip_proto) {
121 st->l4_proto = mt.key->ip_proto;
122 if (st->l4_proto == IPPROTO_TCP) {
123 err = vcap_rule_add_key_bit(st->vrule,
124 VCAP_KF_TCP_IS,
125 VCAP_BIT_1);
126 if (err)
127 goto out;
128 } else if (st->l4_proto == IPPROTO_UDP) {
129 err = vcap_rule_add_key_bit(st->vrule,
130 VCAP_KF_TCP_IS,
131 VCAP_BIT_0);
132 if (err)
133 goto out;
134 if (st->admin->vtype == VCAP_TYPE_IS0) {
135 err = vcap_rule_add_key_bit(st->vrule,
136 VCAP_KF_TCP_UDP_IS,
137 VCAP_BIT_1);
138 if (err)
139 goto out;
140 }
141 } else {
142 err = vcap_rule_add_key_u32(st->vrule,
143 VCAP_KF_L3_IP_PROTO,
144 st->l4_proto, ~0);
145 if (err)
146 goto out;
147 }
148 }
149
150 st->used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
151
152 return err;
153
154out:
155 NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ip_proto parse error");
156 return err;
157}
158
159static int
160sparx5_tc_flower_handler_control_usage(struct vcap_tc_flower_parse_usage *st)
161{
162 struct netlink_ext_ack *extack = st->fco->common.extack;
163 struct flow_match_control mt;
164 u32 value, mask;
165 int err = 0;
166
167 flow_rule_match_control(st->frule, &mt);
168
169 if (mt.mask->flags & (FLOW_DIS_IS_FRAGMENT | FLOW_DIS_FIRST_FRAG)) {
170 u8 is_frag_key = !!(mt.key->flags & FLOW_DIS_IS_FRAGMENT);
171 u8 is_frag_mask = !!(mt.mask->flags & FLOW_DIS_IS_FRAGMENT);
172 u8 is_frag_idx = (is_frag_key << 1) | is_frag_mask;
173
174 u8 first_frag_key = !!(mt.key->flags & FLOW_DIS_FIRST_FRAG);
175 u8 first_frag_mask = !!(mt.mask->flags & FLOW_DIS_FIRST_FRAG);
176 u8 first_frag_idx = (first_frag_key << 1) | first_frag_mask;
177
178 /* Lookup verdict based on the 2 + 2 input bits */
179 u8 vdt = sparx5_vcap_frag_map[is_frag_idx][first_frag_idx];
180
181 if (vdt == FRAG_INVAL) {
182 NL_SET_ERR_MSG_MOD(extack,
183 "Match on invalid fragment flag combination");
184 return -EINVAL;
185 }
186
187 /* Extract VCAP fragment key and mask from verdict */
188 value = (vdt >> 4) & 0x3;
189 mask = vdt & 0x3;
190
191 err = vcap_rule_add_key_u32(st->vrule,
192 VCAP_KF_L3_FRAGMENT_TYPE,
193 value, mask);
194 if (err) {
195 NL_SET_ERR_MSG_MOD(extack, "ip_frag parse error");
196 return err;
197 }
198 }
199
200 if (!flow_rule_is_supp_control_flags(FLOW_DIS_IS_FRAGMENT |
201 FLOW_DIS_FIRST_FRAG,
202 mt.mask->flags, extack))
203 return -EOPNOTSUPP;
204
205 st->used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL);
206
207 return err;
208}
209
210static int
211sparx5_tc_flower_handler_cvlan_usage(struct vcap_tc_flower_parse_usage *st)
212{
213 if (st->admin->vtype != VCAP_TYPE_IS0) {
214 NL_SET_ERR_MSG_MOD(st->fco->common.extack,
215 "cvlan not supported in this VCAP");
216 return -EINVAL;
217 }
218
219 return vcap_tc_flower_handler_cvlan_usage(st);
220}
221
222static int
223sparx5_tc_flower_handler_vlan_usage(struct vcap_tc_flower_parse_usage *st)
224{
225 enum vcap_key_field vid_key = VCAP_KF_8021Q_VID_CLS;
226 enum vcap_key_field pcp_key = VCAP_KF_8021Q_PCP_CLS;
227 int err;
228
229 if (st->admin->vtype == VCAP_TYPE_IS0) {
230 vid_key = VCAP_KF_8021Q_VID0;
231 pcp_key = VCAP_KF_8021Q_PCP0;
232 }
233
234 err = vcap_tc_flower_handler_vlan_usage(st, vid_key, pcp_key);
235 if (err)
236 return err;
237
238 if (st->admin->vtype == VCAP_TYPE_ES0 && st->tpid)
239 err = sparx5_tc_flower_es0_tpid(st);
240
241 return err;
242}
243
244static int (*sparx5_tc_flower_usage_handlers[])(struct vcap_tc_flower_parse_usage *st) = {
245 [FLOW_DISSECTOR_KEY_ETH_ADDRS] = vcap_tc_flower_handler_ethaddr_usage,
246 [FLOW_DISSECTOR_KEY_IPV4_ADDRS] = vcap_tc_flower_handler_ipv4_usage,
247 [FLOW_DISSECTOR_KEY_IPV6_ADDRS] = vcap_tc_flower_handler_ipv6_usage,
248 [FLOW_DISSECTOR_KEY_CONTROL] = sparx5_tc_flower_handler_control_usage,
249 [FLOW_DISSECTOR_KEY_PORTS] = vcap_tc_flower_handler_portnum_usage,
250 [FLOW_DISSECTOR_KEY_BASIC] = sparx5_tc_flower_handler_basic_usage,
251 [FLOW_DISSECTOR_KEY_CVLAN] = sparx5_tc_flower_handler_cvlan_usage,
252 [FLOW_DISSECTOR_KEY_VLAN] = sparx5_tc_flower_handler_vlan_usage,
253 [FLOW_DISSECTOR_KEY_TCP] = vcap_tc_flower_handler_tcp_usage,
254 [FLOW_DISSECTOR_KEY_ARP] = vcap_tc_flower_handler_arp_usage,
255 [FLOW_DISSECTOR_KEY_IP] = vcap_tc_flower_handler_ip_usage,
256};
257
258static int sparx5_tc_use_dissectors(struct vcap_tc_flower_parse_usage *st,
259 struct vcap_admin *admin,
260 struct vcap_rule *vrule)
261{
262 int idx, err = 0;
263
264 for (idx = 0; idx < ARRAY_SIZE(sparx5_tc_flower_usage_handlers); ++idx) {
265 if (!flow_rule_match_key(st->frule, idx))
266 continue;
267 if (!sparx5_tc_flower_usage_handlers[idx])
268 continue;
269 err = sparx5_tc_flower_usage_handlers[idx](st);
270 if (err)
271 return err;
272 }
273
274 if (st->frule->match.dissector->used_keys ^ st->used_keys) {
275 NL_SET_ERR_MSG_MOD(st->fco->common.extack,
276 "Unsupported match item");
277 return -ENOENT;
278 }
279
280 return err;
281}
282
283static int sparx5_tc_flower_action_check(struct vcap_control *vctrl,
284 struct net_device *ndev,
285 struct flow_cls_offload *fco,
286 bool ingress)
287{
288 struct flow_rule *rule = flow_cls_offload_flow_rule(fco);
289 struct flow_action_entry *actent, *last_actent = NULL;
290 struct flow_action *act = &rule->action;
291 u64 action_mask = 0;
292 int idx;
293
294 if (!flow_action_has_entries(act)) {
295 NL_SET_ERR_MSG_MOD(fco->common.extack, "No actions");
296 return -EINVAL;
297 }
298
299 if (!flow_action_basic_hw_stats_check(act, fco->common.extack))
300 return -EOPNOTSUPP;
301
302 flow_action_for_each(idx, actent, act) {
303 if (action_mask & BIT(actent->id)) {
304 NL_SET_ERR_MSG_MOD(fco->common.extack,
305 "More actions of the same type");
306 return -EINVAL;
307 }
308 action_mask |= BIT(actent->id);
309 last_actent = actent; /* Save last action for later check */
310 }
311
312 /* Check if last action is a goto
313 * The last chain/lookup does not need to have a goto action
314 */
315 if (last_actent->id == FLOW_ACTION_GOTO) {
316 /* Check if the destination chain is in one of the VCAPs */
317 if (!vcap_is_next_lookup(vctrl, fco->common.chain_index,
318 last_actent->chain_index)) {
319 NL_SET_ERR_MSG_MOD(fco->common.extack,
320 "Invalid goto chain");
321 return -EINVAL;
322 }
323 } else if (!vcap_is_last_chain(vctrl, fco->common.chain_index,
324 ingress)) {
325 NL_SET_ERR_MSG_MOD(fco->common.extack,
326 "Last action must be 'goto'");
327 return -EINVAL;
328 }
329
330 /* Catch unsupported combinations of actions */
331 if (action_mask & BIT(FLOW_ACTION_TRAP) &&
332 action_mask & BIT(FLOW_ACTION_ACCEPT)) {
333 NL_SET_ERR_MSG_MOD(fco->common.extack,
334 "Cannot combine pass and trap action");
335 return -EOPNOTSUPP;
336 }
337
338 if (action_mask & BIT(FLOW_ACTION_VLAN_PUSH) &&
339 action_mask & BIT(FLOW_ACTION_VLAN_POP)) {
340 NL_SET_ERR_MSG_MOD(fco->common.extack,
341 "Cannot combine vlan push and pop action");
342 return -EOPNOTSUPP;
343 }
344
345 if (action_mask & BIT(FLOW_ACTION_VLAN_PUSH) &&
346 action_mask & BIT(FLOW_ACTION_VLAN_MANGLE)) {
347 NL_SET_ERR_MSG_MOD(fco->common.extack,
348 "Cannot combine vlan push and modify action");
349 return -EOPNOTSUPP;
350 }
351
352 if (action_mask & BIT(FLOW_ACTION_VLAN_POP) &&
353 action_mask & BIT(FLOW_ACTION_VLAN_MANGLE)) {
354 NL_SET_ERR_MSG_MOD(fco->common.extack,
355 "Cannot combine vlan pop and modify action");
356 return -EOPNOTSUPP;
357 }
358
359 return 0;
360}
361
362/* Add a rule counter action */
363static int sparx5_tc_add_rule_counter(struct vcap_admin *admin,
364 struct vcap_rule *vrule)
365{
366 int err;
367
368 switch (admin->vtype) {
369 case VCAP_TYPE_IS0:
370 break;
371 case VCAP_TYPE_ES0:
372 err = vcap_rule_mod_action_u32(vrule, VCAP_AF_ESDX,
373 vrule->id);
374 if (err)
375 return err;
376 vcap_rule_set_counter_id(vrule, vrule->id);
377 break;
378 case VCAP_TYPE_IS2:
379 case VCAP_TYPE_ES2:
380 err = vcap_rule_mod_action_u32(vrule, VCAP_AF_CNT_ID,
381 vrule->id);
382 if (err)
383 return err;
384 vcap_rule_set_counter_id(vrule, vrule->id);
385 break;
386 default:
387 pr_err("%s:%d: vcap type: %d not supported\n",
388 __func__, __LINE__, admin->vtype);
389 break;
390 }
391 return 0;
392}
393
394/* Collect all port keysets and apply the first of them, possibly wildcarded */
395static int sparx5_tc_select_protocol_keyset(struct net_device *ndev,
396 struct vcap_rule *vrule,
397 struct vcap_admin *admin,
398 u16 l3_proto,
399 struct sparx5_multiple_rules *multi)
400{
401 struct sparx5_port *port = netdev_priv(ndev);
402 struct vcap_keyset_list portkeysetlist = {};
403 enum vcap_keyfield_set portkeysets[10] = {};
404 struct vcap_keyset_list matches = {};
405 enum vcap_keyfield_set keysets[10];
406 int idx, jdx, err = 0, count = 0;
407 struct sparx5_wildcard_rule *mru;
408 const struct vcap_set *kinfo;
409 struct vcap_control *vctrl;
410
411 vctrl = port->sparx5->vcap_ctrl;
412
413 /* Find the keysets that the rule can use */
414 matches.keysets = keysets;
415 matches.max = ARRAY_SIZE(keysets);
416 if (!vcap_rule_find_keysets(vrule, &matches))
417 return -EINVAL;
418
419 /* Find the keysets that the port configuration supports */
420 portkeysetlist.max = ARRAY_SIZE(portkeysets);
421 portkeysetlist.keysets = portkeysets;
422 err = sparx5_vcap_get_port_keyset(ndev,
423 admin, vrule->vcap_chain_id,
424 l3_proto,
425 &portkeysetlist);
426 if (err)
427 return err;
428
429 /* Find the intersection of the two sets of keyset */
430 for (idx = 0; idx < portkeysetlist.cnt; ++idx) {
431 kinfo = vcap_keyfieldset(vctrl, admin->vtype,
432 portkeysetlist.keysets[idx]);
433 if (!kinfo)
434 continue;
435
436 /* Find a port keyset that matches the required keys
437 * If there are multiple keysets then compose a type id mask
438 */
439 for (jdx = 0; jdx < matches.cnt; ++jdx) {
440 if (portkeysetlist.keysets[idx] != matches.keysets[jdx])
441 continue;
442
443 mru = &multi->rule[kinfo->sw_per_item];
444 if (!mru->selected) {
445 mru->selected = true;
446 mru->keyset = portkeysetlist.keysets[idx];
447 mru->value = kinfo->type_id;
448 }
449 mru->value &= kinfo->type_id;
450 mru->mask |= kinfo->type_id;
451 ++count;
452 }
453 }
454 if (count == 0)
455 return -EPROTO;
456
457 if (l3_proto == ETH_P_ALL && count < portkeysetlist.cnt)
458 return -ENOENT;
459
460 for (idx = 0; idx < SPX5_MAX_RULE_SIZE; ++idx) {
461 mru = &multi->rule[idx];
462 if (!mru->selected)
463 continue;
464
465 /* Align the mask to the combined value */
466 mru->mask ^= mru->value;
467 }
468
469 /* Set the chosen keyset on the rule and set a wildcarded type if there
470 * are more than one keyset
471 */
472 for (idx = 0; idx < SPX5_MAX_RULE_SIZE; ++idx) {
473 mru = &multi->rule[idx];
474 if (!mru->selected)
475 continue;
476
477 vcap_set_rule_set_keyset(vrule, mru->keyset);
478 if (count > 1)
479 /* Some keysets do not have a type field */
480 vcap_rule_mod_key_u32(vrule, VCAP_KF_TYPE,
481 mru->value,
482 ~mru->mask);
483 mru->selected = false; /* mark as done */
484 break; /* Stop here and add more rules later */
485 }
486 return err;
487}
488
489static int sparx5_tc_add_rule_copy(struct vcap_control *vctrl,
490 struct flow_cls_offload *fco,
491 struct vcap_rule *erule,
492 struct vcap_admin *admin,
493 struct sparx5_wildcard_rule *rule)
494{
495 enum vcap_key_field keylist[] = {
496 VCAP_KF_IF_IGR_PORT_MASK,
497 VCAP_KF_IF_IGR_PORT_MASK_SEL,
498 VCAP_KF_IF_IGR_PORT_MASK_RNG,
499 VCAP_KF_LOOKUP_FIRST_IS,
500 VCAP_KF_TYPE,
501 };
502 struct vcap_rule *vrule;
503 int err;
504
505 /* Add an extra rule with a special user and the new keyset */
506 erule->user = VCAP_USER_TC_EXTRA;
507 vrule = vcap_copy_rule(erule);
508 if (IS_ERR(vrule))
509 return PTR_ERR(vrule);
510
511 /* Link the new rule to the existing rule with the cookie */
512 vrule->cookie = erule->cookie;
513 vcap_filter_rule_keys(vrule, keylist, ARRAY_SIZE(keylist), true);
514 err = vcap_set_rule_set_keyset(vrule, rule->keyset);
515 if (err) {
516 pr_err("%s:%d: could not set keyset %s in rule: %u\n",
517 __func__, __LINE__,
518 vcap_keyset_name(vctrl, rule->keyset),
519 vrule->id);
520 goto out;
521 }
522
523 /* Some keysets do not have a type field, so ignore return value */
524 vcap_rule_mod_key_u32(vrule, VCAP_KF_TYPE, rule->value, ~rule->mask);
525
526 err = vcap_set_rule_set_actionset(vrule, erule->actionset);
527 if (err)
528 goto out;
529
530 err = sparx5_tc_add_rule_counter(admin, vrule);
531 if (err)
532 goto out;
533
534 err = vcap_val_rule(vrule, ETH_P_ALL);
535 if (err) {
536 pr_err("%s:%d: could not validate rule: %u\n",
537 __func__, __LINE__, vrule->id);
538 vcap_set_tc_exterr(fco, vrule);
539 goto out;
540 }
541 err = vcap_add_rule(vrule);
542 if (err) {
543 pr_err("%s:%d: could not add rule: %u\n",
544 __func__, __LINE__, vrule->id);
545 goto out;
546 }
547out:
548 vcap_free_rule(vrule);
549 return err;
550}
551
552static int sparx5_tc_add_remaining_rules(struct vcap_control *vctrl,
553 struct flow_cls_offload *fco,
554 struct vcap_rule *erule,
555 struct vcap_admin *admin,
556 struct sparx5_multiple_rules *multi)
557{
558 int idx, err = 0;
559
560 for (idx = 0; idx < SPX5_MAX_RULE_SIZE; ++idx) {
561 if (!multi->rule[idx].selected)
562 continue;
563
564 err = sparx5_tc_add_rule_copy(vctrl, fco, erule, admin,
565 &multi->rule[idx]);
566 if (err)
567 break;
568 }
569 return err;
570}
571
572/* Add the actionset that is the default for the VCAP type */
573static int sparx5_tc_set_actionset(struct vcap_admin *admin,
574 struct vcap_rule *vrule)
575{
576 enum vcap_actionfield_set aset;
577 int err = 0;
578
579 switch (admin->vtype) {
580 case VCAP_TYPE_IS0:
581 aset = VCAP_AFS_CLASSIFICATION;
582 break;
583 case VCAP_TYPE_IS2:
584 aset = VCAP_AFS_BASE_TYPE;
585 break;
586 case VCAP_TYPE_ES0:
587 aset = VCAP_AFS_ES0;
588 break;
589 case VCAP_TYPE_ES2:
590 aset = VCAP_AFS_BASE_TYPE;
591 break;
592 default:
593 pr_err("%s:%d: %s\n", __func__, __LINE__, "Invalid VCAP type");
594 return -EINVAL;
595 }
596 /* Do not overwrite any current actionset */
597 if (vrule->actionset == VCAP_AFS_NO_VALUE)
598 err = vcap_set_rule_set_actionset(vrule, aset);
599 return err;
600}
601
602/* Add the VCAP key to match on for a rule target value */
603static int sparx5_tc_add_rule_link_target(struct vcap_admin *admin,
604 struct vcap_rule *vrule,
605 int target_cid)
606{
607 int link_val = target_cid % VCAP_CID_LOOKUP_SIZE;
608 int err;
609
610 if (!link_val)
611 return 0;
612
613 switch (admin->vtype) {
614 case VCAP_TYPE_IS0:
615 /* Add NXT_IDX key for chaining rules between IS0 instances */
616 err = vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_GEN_IDX_SEL,
617 1, /* enable */
618 ~0);
619 if (err)
620 return err;
621 return vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_GEN_IDX,
622 link_val, /* target */
623 ~0);
624 case VCAP_TYPE_IS2:
625 /* Add PAG key for chaining rules from IS0 */
626 return vcap_rule_add_key_u32(vrule, VCAP_KF_LOOKUP_PAG,
627 link_val, /* target */
628 ~0);
629 case VCAP_TYPE_ES0:
630 case VCAP_TYPE_ES2:
631 /* Add ISDX key for chaining rules from IS0 */
632 return vcap_rule_add_key_u32(vrule, VCAP_KF_ISDX_CLS, link_val,
633 ~0);
634 default:
635 break;
636 }
637 return 0;
638}
639
640/* Add the VCAP action that adds a target value to a rule */
641static int sparx5_tc_add_rule_link(struct vcap_control *vctrl,
642 struct vcap_admin *admin,
643 struct vcap_rule *vrule,
644 int from_cid, int to_cid)
645{
646 struct vcap_admin *to_admin = vcap_find_admin(vctrl, to_cid);
647 int diff, err = 0;
648
649 if (!to_admin) {
650 pr_err("%s:%d: unsupported chain direction: %d\n",
651 __func__, __LINE__, to_cid);
652 return -EINVAL;
653 }
654
655 diff = vcap_chain_offset(vctrl, from_cid, to_cid);
656 if (!diff)
657 return 0;
658
659 if (admin->vtype == VCAP_TYPE_IS0 &&
660 to_admin->vtype == VCAP_TYPE_IS0) {
661 /* Between IS0 instances the G_IDX value is used */
662 err = vcap_rule_add_action_u32(vrule, VCAP_AF_NXT_IDX, diff);
663 if (err)
664 goto out;
665 err = vcap_rule_add_action_u32(vrule, VCAP_AF_NXT_IDX_CTRL,
666 1); /* Replace */
667 if (err)
668 goto out;
669 } else if (admin->vtype == VCAP_TYPE_IS0 &&
670 to_admin->vtype == VCAP_TYPE_IS2) {
671 /* Between IS0 and IS2 the PAG value is used */
672 err = vcap_rule_add_action_u32(vrule, VCAP_AF_PAG_VAL, diff);
673 if (err)
674 goto out;
675 err = vcap_rule_add_action_u32(vrule,
676 VCAP_AF_PAG_OVERRIDE_MASK,
677 0xff);
678 if (err)
679 goto out;
680 } else if (admin->vtype == VCAP_TYPE_IS0 &&
681 (to_admin->vtype == VCAP_TYPE_ES0 ||
682 to_admin->vtype == VCAP_TYPE_ES2)) {
683 /* Between IS0 and ES0/ES2 the ISDX value is used */
684 err = vcap_rule_add_action_u32(vrule, VCAP_AF_ISDX_VAL,
685 diff);
686 if (err)
687 goto out;
688 err = vcap_rule_add_action_bit(vrule,
689 VCAP_AF_ISDX_ADD_REPLACE_SEL,
690 VCAP_BIT_1);
691 if (err)
692 goto out;
693 } else {
694 pr_err("%s:%d: unsupported chain destination: %d\n",
695 __func__, __LINE__, to_cid);
696 err = -EOPNOTSUPP;
697 }
698out:
699 return err;
700}
701
702static int sparx5_tc_flower_parse_act_gate(struct sparx5_psfp_sg *sg,
703 struct flow_action_entry *act,
704 struct netlink_ext_ack *extack)
705{
706 int i;
707
708 if (act->gate.prio < -1 || act->gate.prio > SPX5_PSFP_SG_MAX_IPV) {
709 NL_SET_ERR_MSG_MOD(extack, "Invalid gate priority");
710 return -EINVAL;
711 }
712
713 if (act->gate.cycletime < SPX5_PSFP_SG_MIN_CYCLE_TIME_NS ||
714 act->gate.cycletime > SPX5_PSFP_SG_MAX_CYCLE_TIME_NS) {
715 NL_SET_ERR_MSG_MOD(extack, "Invalid gate cycletime");
716 return -EINVAL;
717 }
718
719 if (act->gate.cycletimeext > SPX5_PSFP_SG_MAX_CYCLE_TIME_NS) {
720 NL_SET_ERR_MSG_MOD(extack, "Invalid gate cycletimeext");
721 return -EINVAL;
722 }
723
724 if (act->gate.num_entries >= SPX5_PSFP_GCE_CNT) {
725 NL_SET_ERR_MSG_MOD(extack, "Invalid number of gate entries");
726 return -EINVAL;
727 }
728
729 sg->gate_state = true;
730 sg->ipv = act->gate.prio;
731 sg->num_entries = act->gate.num_entries;
732 sg->cycletime = act->gate.cycletime;
733 sg->cycletimeext = act->gate.cycletimeext;
734
735 for (i = 0; i < sg->num_entries; i++) {
736 sg->gce[i].gate_state = !!act->gate.entries[i].gate_state;
737 sg->gce[i].interval = act->gate.entries[i].interval;
738 sg->gce[i].ipv = act->gate.entries[i].ipv;
739 sg->gce[i].maxoctets = act->gate.entries[i].maxoctets;
740 }
741
742 return 0;
743}
744
745static int sparx5_tc_flower_parse_act_police(struct sparx5_policer *pol,
746 struct flow_action_entry *act,
747 struct netlink_ext_ack *extack)
748{
749 pol->type = SPX5_POL_SERVICE;
750 pol->rate = div_u64(act->police.rate_bytes_ps, 1000) * 8;
751 pol->burst = act->police.burst;
752 pol->idx = act->hw_index;
753
754 /* rate is now in kbit */
755 if (pol->rate > DIV_ROUND_UP(SPX5_SDLB_GROUP_RATE_MAX, 1000)) {
756 NL_SET_ERR_MSG_MOD(extack, "Maximum rate exceeded");
757 return -EINVAL;
758 }
759
760 if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
761 NL_SET_ERR_MSG_MOD(extack, "Offload not supported when exceed action is not drop");
762 return -EOPNOTSUPP;
763 }
764
765 if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
766 act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
767 NL_SET_ERR_MSG_MOD(extack, "Offload not supported when conform action is not pipe or ok");
768 return -EOPNOTSUPP;
769 }
770
771 return 0;
772}
773
774static int sparx5_tc_flower_psfp_setup(struct sparx5 *sparx5,
775 struct vcap_rule *vrule, int sg_idx,
776 int pol_idx, struct sparx5_psfp_sg *sg,
777 struct sparx5_psfp_fm *fm,
778 struct sparx5_psfp_sf *sf)
779{
780 u32 psfp_sfid = 0, psfp_fmid = 0, psfp_sgid = 0;
781 int ret;
782
783 /* Must always have a stream gate - max sdu (filter option) is evaluated
784 * after frames have passed the gate, so in case of only a policer, we
785 * allocate a stream gate that is always open.
786 */
787 if (sg_idx < 0) {
788 /* Always-open stream gate is always the last */
789 sg_idx = sparx5_pool_idx_to_id(sparx5->data->consts->n_gates -
790 1);
791 sg->ipv = 0; /* Disabled */
792 sg->cycletime = SPX5_PSFP_SG_CYCLE_TIME_DEFAULT;
793 sg->num_entries = 1;
794 sg->gate_state = 1; /* Open */
795 sg->gate_enabled = 1;
796 sg->gce[0].gate_state = 1;
797 sg->gce[0].interval = SPX5_PSFP_SG_CYCLE_TIME_DEFAULT;
798 sg->gce[0].ipv = 0;
799 sg->gce[0].maxoctets = 0; /* Disabled */
800 }
801
802 ret = sparx5_psfp_sg_add(sparx5, sg_idx, sg, &psfp_sgid);
803 if (ret < 0)
804 return ret;
805
806 if (pol_idx >= 0) {
807 /* Add new flow-meter */
808 ret = sparx5_psfp_fm_add(sparx5, pol_idx, fm, &psfp_fmid);
809 if (ret < 0)
810 return ret;
811 }
812
813 /* Map stream filter to stream gate */
814 sf->sgid = psfp_sgid;
815
816 /* Add new stream-filter and map it to a steam gate */
817 ret = sparx5_psfp_sf_add(sparx5, sf, &psfp_sfid);
818 if (ret < 0)
819 return ret;
820
821 /* Streams are classified by ISDX - map ISDX 1:1 to sfid for now. */
822 sparx5_isdx_conf_set(sparx5, psfp_sfid, psfp_sfid, psfp_fmid);
823
824 ret = vcap_rule_add_action_bit(vrule, VCAP_AF_ISDX_ADD_REPLACE_SEL,
825 VCAP_BIT_1);
826 if (ret)
827 return ret;
828
829 ret = vcap_rule_add_action_u32(vrule, VCAP_AF_ISDX_VAL, psfp_sfid);
830 if (ret)
831 return ret;
832
833 return 0;
834}
835
836/* Handle the action trap for a VCAP rule */
837static int sparx5_tc_action_trap(struct vcap_admin *admin,
838 struct vcap_rule *vrule,
839 struct flow_cls_offload *fco)
840{
841 int err = 0;
842
843 switch (admin->vtype) {
844 case VCAP_TYPE_IS2:
845 err = vcap_rule_add_action_bit(vrule,
846 VCAP_AF_CPU_COPY_ENA,
847 VCAP_BIT_1);
848 if (err)
849 break;
850 err = vcap_rule_add_action_u32(vrule,
851 VCAP_AF_CPU_QUEUE_NUM, 0);
852 if (err)
853 break;
854 err = vcap_rule_add_action_u32(vrule,
855 VCAP_AF_MASK_MODE,
856 SPX5_PMM_REPLACE_ALL);
857 break;
858 case VCAP_TYPE_ES0:
859 err = vcap_rule_add_action_u32(vrule,
860 VCAP_AF_FWD_SEL,
861 SPX5_FWSEL_REDIRECT_TO_LOOPBACK);
862 break;
863 case VCAP_TYPE_ES2:
864 err = vcap_rule_add_action_bit(vrule,
865 VCAP_AF_CPU_COPY_ENA,
866 VCAP_BIT_1);
867 if (err)
868 break;
869 err = vcap_rule_add_action_u32(vrule,
870 VCAP_AF_CPU_QUEUE_NUM, 0);
871 break;
872 default:
873 NL_SET_ERR_MSG_MOD(fco->common.extack,
874 "Trap action not supported in this VCAP");
875 err = -EOPNOTSUPP;
876 break;
877 }
878 return err;
879}
880
881static int sparx5_tc_action_vlan_pop(struct vcap_admin *admin,
882 struct vcap_rule *vrule,
883 struct flow_cls_offload *fco,
884 u16 tpid)
885{
886 int err = 0;
887
888 switch (admin->vtype) {
889 case VCAP_TYPE_ES0:
890 break;
891 default:
892 NL_SET_ERR_MSG_MOD(fco->common.extack,
893 "VLAN pop action not supported in this VCAP");
894 return -EOPNOTSUPP;
895 }
896
897 switch (tpid) {
898 case ETH_P_8021Q:
899 case ETH_P_8021AD:
900 err = vcap_rule_add_action_u32(vrule,
901 VCAP_AF_PUSH_OUTER_TAG,
902 SPX5_OTAG_UNTAG);
903 break;
904 default:
905 NL_SET_ERR_MSG_MOD(fco->common.extack,
906 "Invalid vlan proto");
907 err = -EINVAL;
908 }
909 return err;
910}
911
912static int sparx5_tc_action_vlan_modify(struct vcap_admin *admin,
913 struct vcap_rule *vrule,
914 struct flow_cls_offload *fco,
915 struct flow_action_entry *act,
916 u16 tpid)
917{
918 int err = 0;
919
920 switch (admin->vtype) {
921 case VCAP_TYPE_ES0:
922 err = vcap_rule_add_action_u32(vrule,
923 VCAP_AF_PUSH_OUTER_TAG,
924 SPX5_OTAG_TAG_A);
925 if (err)
926 return err;
927 break;
928 default:
929 NL_SET_ERR_MSG_MOD(fco->common.extack,
930 "VLAN modify action not supported in this VCAP");
931 return -EOPNOTSUPP;
932 }
933
934 switch (tpid) {
935 case ETH_P_8021Q:
936 err = vcap_rule_add_action_u32(vrule,
937 VCAP_AF_TAG_A_TPID_SEL,
938 SPX5_TPID_A_8100);
939 break;
940 case ETH_P_8021AD:
941 err = vcap_rule_add_action_u32(vrule,
942 VCAP_AF_TAG_A_TPID_SEL,
943 SPX5_TPID_A_88A8);
944 break;
945 default:
946 NL_SET_ERR_MSG_MOD(fco->common.extack,
947 "Invalid vlan proto");
948 err = -EINVAL;
949 }
950 if (err)
951 return err;
952
953 err = vcap_rule_add_action_u32(vrule,
954 VCAP_AF_TAG_A_VID_SEL,
955 SPX5_VID_A_VAL);
956 if (err)
957 return err;
958
959 err = vcap_rule_add_action_u32(vrule,
960 VCAP_AF_VID_A_VAL,
961 act->vlan.vid);
962 if (err)
963 return err;
964
965 err = vcap_rule_add_action_u32(vrule,
966 VCAP_AF_TAG_A_PCP_SEL,
967 SPX5_PCP_A_VAL);
968 if (err)
969 return err;
970
971 err = vcap_rule_add_action_u32(vrule,
972 VCAP_AF_PCP_A_VAL,
973 act->vlan.prio);
974 if (err)
975 return err;
976
977 return vcap_rule_add_action_u32(vrule,
978 VCAP_AF_TAG_A_DEI_SEL,
979 SPX5_DEI_A_CLASSIFIED);
980}
981
982static int sparx5_tc_action_vlan_push(struct vcap_admin *admin,
983 struct vcap_rule *vrule,
984 struct flow_cls_offload *fco,
985 struct flow_action_entry *act,
986 u16 tpid)
987{
988 u16 act_tpid = be16_to_cpu(act->vlan.proto);
989 int err = 0;
990
991 switch (admin->vtype) {
992 case VCAP_TYPE_ES0:
993 break;
994 default:
995 NL_SET_ERR_MSG_MOD(fco->common.extack,
996 "VLAN push action not supported in this VCAP");
997 return -EOPNOTSUPP;
998 }
999
1000 if (tpid == ETH_P_8021AD) {
1001 NL_SET_ERR_MSG_MOD(fco->common.extack,
1002 "Cannot push on double tagged frames");
1003 return -EOPNOTSUPP;
1004 }
1005
1006 err = sparx5_tc_action_vlan_modify(admin, vrule, fco, act, act_tpid);
1007 if (err)
1008 return err;
1009
1010 switch (act_tpid) {
1011 case ETH_P_8021Q:
1012 break;
1013 case ETH_P_8021AD:
1014 /* Push classified tag as inner tag */
1015 err = vcap_rule_add_action_u32(vrule,
1016 VCAP_AF_PUSH_INNER_TAG,
1017 SPX5_ITAG_PUSH_B_TAG);
1018 if (err)
1019 break;
1020 err = vcap_rule_add_action_u32(vrule,
1021 VCAP_AF_TAG_B_TPID_SEL,
1022 SPX5_TPID_B_CLASSIFIED);
1023 break;
1024 default:
1025 NL_SET_ERR_MSG_MOD(fco->common.extack,
1026 "Invalid vlan proto");
1027 err = -EINVAL;
1028 }
1029 return err;
1030}
1031
1032static void sparx5_tc_flower_set_port_mask(struct vcap_u72_action *ports,
1033 struct net_device *ndev)
1034{
1035 struct sparx5_port *port = netdev_priv(ndev);
1036 int byidx = port->portno / BITS_PER_BYTE;
1037 int biidx = port->portno % BITS_PER_BYTE;
1038
1039 ports->value[byidx] |= BIT(biidx);
1040}
1041
1042static int sparx5_tc_action_mirred(struct vcap_admin *admin,
1043 struct vcap_rule *vrule,
1044 struct flow_cls_offload *fco,
1045 struct flow_action_entry *act)
1046{
1047 struct vcap_u72_action ports = {0};
1048 int err;
1049
1050 if (admin->vtype != VCAP_TYPE_IS0 && admin->vtype != VCAP_TYPE_IS2) {
1051 NL_SET_ERR_MSG_MOD(fco->common.extack,
1052 "Mirror action not supported in this VCAP");
1053 return -EOPNOTSUPP;
1054 }
1055
1056 err = vcap_rule_add_action_u32(vrule, VCAP_AF_MASK_MODE,
1057 SPX5_PMM_OR_DSTMASK);
1058 if (err)
1059 return err;
1060
1061 sparx5_tc_flower_set_port_mask(&ports, act->dev);
1062
1063 return vcap_rule_add_action_u72(vrule, VCAP_AF_PORT_MASK, &ports);
1064}
1065
1066static int sparx5_tc_action_redirect(struct vcap_admin *admin,
1067 struct vcap_rule *vrule,
1068 struct flow_cls_offload *fco,
1069 struct flow_action_entry *act)
1070{
1071 struct vcap_u72_action ports = {0};
1072 int err;
1073
1074 if (admin->vtype != VCAP_TYPE_IS0 && admin->vtype != VCAP_TYPE_IS2) {
1075 NL_SET_ERR_MSG_MOD(fco->common.extack,
1076 "Redirect action not supported in this VCAP");
1077 return -EOPNOTSUPP;
1078 }
1079
1080 err = vcap_rule_add_action_u32(vrule, VCAP_AF_MASK_MODE,
1081 SPX5_PMM_REPLACE_ALL);
1082 if (err)
1083 return err;
1084
1085 sparx5_tc_flower_set_port_mask(&ports, act->dev);
1086
1087 return vcap_rule_add_action_u72(vrule, VCAP_AF_PORT_MASK, &ports);
1088}
1089
1090/* Remove rule keys that may prevent templates from matching a keyset */
1091static void sparx5_tc_flower_simplify_rule(struct vcap_admin *admin,
1092 struct vcap_rule *vrule,
1093 u16 l3_proto)
1094{
1095 switch (admin->vtype) {
1096 case VCAP_TYPE_IS0:
1097 vcap_rule_rem_key(vrule, VCAP_KF_ETYPE);
1098 switch (l3_proto) {
1099 case ETH_P_IP:
1100 break;
1101 case ETH_P_IPV6:
1102 vcap_rule_rem_key(vrule, VCAP_KF_IP_SNAP_IS);
1103 break;
1104 default:
1105 break;
1106 }
1107 break;
1108 case VCAP_TYPE_ES2:
1109 switch (l3_proto) {
1110 case ETH_P_IP:
1111 if (vrule->keyset == VCAP_KFS_IP4_OTHER)
1112 vcap_rule_rem_key(vrule, VCAP_KF_TCP_IS);
1113 break;
1114 case ETH_P_IPV6:
1115 if (vrule->keyset == VCAP_KFS_IP6_STD)
1116 vcap_rule_rem_key(vrule, VCAP_KF_TCP_IS);
1117 vcap_rule_rem_key(vrule, VCAP_KF_IP4_IS);
1118 break;
1119 default:
1120 break;
1121 }
1122 break;
1123 case VCAP_TYPE_IS2:
1124 switch (l3_proto) {
1125 case ETH_P_IP:
1126 case ETH_P_IPV6:
1127 vcap_rule_rem_key(vrule, VCAP_KF_IP4_IS);
1128 break;
1129 default:
1130 break;
1131 }
1132 break;
1133 default:
1134 break;
1135 }
1136}
1137
1138static bool sparx5_tc_flower_use_template(struct net_device *ndev,
1139 struct flow_cls_offload *fco,
1140 struct vcap_admin *admin,
1141 struct vcap_rule *vrule)
1142{
1143 struct sparx5_port *port = netdev_priv(ndev);
1144 struct sparx5_tc_flower_template *ftp;
1145
1146 list_for_each_entry(ftp, &port->tc_templates, list) {
1147 if (ftp->cid != fco->common.chain_index)
1148 continue;
1149
1150 vcap_set_rule_set_keyset(vrule, ftp->keyset);
1151 sparx5_tc_flower_simplify_rule(admin, vrule, ftp->l3_proto);
1152 return true;
1153 }
1154 return false;
1155}
1156
1157static int sparx5_tc_flower_replace(struct net_device *ndev,
1158 struct flow_cls_offload *fco,
1159 struct vcap_admin *admin,
1160 bool ingress)
1161{
1162 struct sparx5_psfp_sf sf = { .max_sdu = SPX5_PSFP_SF_MAX_SDU };
1163 struct netlink_ext_ack *extack = fco->common.extack;
1164 int err, idx, tc_sg_idx = -1, tc_pol_idx = -1;
1165 struct vcap_tc_flower_parse_usage state = {
1166 .fco = fco,
1167 .l3_proto = ETH_P_ALL,
1168 .admin = admin,
1169 };
1170 struct sparx5_port *port = netdev_priv(ndev);
1171 struct sparx5_multiple_rules multi = {};
1172 struct sparx5 *sparx5 = port->sparx5;
1173 struct sparx5_psfp_sg sg = { 0 };
1174 struct sparx5_psfp_fm fm = { 0 };
1175 struct flow_action_entry *act;
1176 struct vcap_control *vctrl;
1177 struct flow_rule *frule;
1178 struct vcap_rule *vrule;
1179
1180 vctrl = port->sparx5->vcap_ctrl;
1181
1182 err = sparx5_tc_flower_action_check(vctrl, ndev, fco, ingress);
1183 if (err)
1184 return err;
1185
1186 vrule = vcap_alloc_rule(vctrl, ndev, fco->common.chain_index, VCAP_USER_TC,
1187 fco->common.prio, 0);
1188 if (IS_ERR(vrule))
1189 return PTR_ERR(vrule);
1190
1191 vrule->cookie = fco->cookie;
1192
1193 state.vrule = vrule;
1194 state.frule = flow_cls_offload_flow_rule(fco);
1195 err = sparx5_tc_use_dissectors(&state, admin, vrule);
1196 if (err)
1197 goto out;
1198
1199 err = sparx5_tc_add_rule_counter(admin, vrule);
1200 if (err)
1201 goto out;
1202
1203 err = sparx5_tc_add_rule_link_target(admin, vrule,
1204 fco->common.chain_index);
1205 if (err)
1206 goto out;
1207
1208 frule = flow_cls_offload_flow_rule(fco);
1209 flow_action_for_each(idx, act, &frule->action) {
1210 switch (act->id) {
1211 case FLOW_ACTION_GATE: {
1212 err = sparx5_tc_flower_parse_act_gate(&sg, act, extack);
1213 if (err < 0)
1214 goto out;
1215
1216 tc_sg_idx = act->hw_index;
1217
1218 break;
1219 }
1220 case FLOW_ACTION_POLICE: {
1221 err = sparx5_tc_flower_parse_act_police(&fm.pol, act,
1222 extack);
1223 if (err < 0)
1224 goto out;
1225
1226 tc_pol_idx = fm.pol.idx;
1227 sf.max_sdu = act->police.mtu;
1228
1229 break;
1230 }
1231 case FLOW_ACTION_TRAP:
1232 err = sparx5_tc_action_trap(admin, vrule, fco);
1233 if (err)
1234 goto out;
1235 break;
1236 case FLOW_ACTION_MIRRED:
1237 err = sparx5_tc_action_mirred(admin, vrule, fco, act);
1238 if (err)
1239 goto out;
1240 break;
1241 case FLOW_ACTION_REDIRECT:
1242 err = sparx5_tc_action_redirect(admin, vrule, fco, act);
1243 if (err)
1244 goto out;
1245 break;
1246 case FLOW_ACTION_ACCEPT:
1247 err = sparx5_tc_set_actionset(admin, vrule);
1248 if (err)
1249 goto out;
1250 break;
1251 case FLOW_ACTION_GOTO:
1252 err = sparx5_tc_set_actionset(admin, vrule);
1253 if (err)
1254 goto out;
1255 sparx5_tc_add_rule_link(vctrl, admin, vrule,
1256 fco->common.chain_index,
1257 act->chain_index);
1258 break;
1259 case FLOW_ACTION_VLAN_POP:
1260 err = sparx5_tc_action_vlan_pop(admin, vrule, fco,
1261 state.tpid);
1262 if (err)
1263 goto out;
1264 break;
1265 case FLOW_ACTION_VLAN_PUSH:
1266 err = sparx5_tc_action_vlan_push(admin, vrule, fco,
1267 act, state.tpid);
1268 if (err)
1269 goto out;
1270 break;
1271 case FLOW_ACTION_VLAN_MANGLE:
1272 err = sparx5_tc_action_vlan_modify(admin, vrule, fco,
1273 act, state.tpid);
1274 if (err)
1275 goto out;
1276 break;
1277 default:
1278 NL_SET_ERR_MSG_MOD(fco->common.extack,
1279 "Unsupported TC action");
1280 err = -EOPNOTSUPP;
1281 goto out;
1282 }
1283 }
1284
1285 /* Setup PSFP */
1286 if (tc_sg_idx >= 0 || tc_pol_idx >= 0) {
1287 if (!sparx5_has_feature(sparx5, SPX5_FEATURE_PSFP)) {
1288 err = -EOPNOTSUPP;
1289 goto out;
1290 }
1291
1292 err = sparx5_tc_flower_psfp_setup(sparx5, vrule, tc_sg_idx,
1293 tc_pol_idx, &sg, &fm, &sf);
1294 if (err)
1295 goto out;
1296 }
1297
1298 if (!sparx5_tc_flower_use_template(ndev, fco, admin, vrule)) {
1299 err = sparx5_tc_select_protocol_keyset(ndev, vrule, admin,
1300 state.l3_proto, &multi);
1301 if (err) {
1302 NL_SET_ERR_MSG_MOD(fco->common.extack,
1303 "No matching port keyset for filter protocol and keys");
1304 goto out;
1305 }
1306 }
1307
1308 /* provide the l3 protocol to guide the keyset selection */
1309 err = vcap_val_rule(vrule, state.l3_proto);
1310 if (err) {
1311 vcap_set_tc_exterr(fco, vrule);
1312 goto out;
1313 }
1314 err = vcap_add_rule(vrule);
1315 if (err)
1316 NL_SET_ERR_MSG_MOD(fco->common.extack,
1317 "Could not add the filter");
1318
1319 if (state.l3_proto == ETH_P_ALL)
1320 err = sparx5_tc_add_remaining_rules(vctrl, fco, vrule, admin,
1321 &multi);
1322
1323out:
1324 vcap_free_rule(vrule);
1325 return err;
1326}
1327
1328static void sparx5_tc_free_psfp_resources(struct sparx5 *sparx5,
1329 struct vcap_rule *vrule)
1330{
1331 struct vcap_client_actionfield *afield;
1332 u32 isdx, sfid, sgid, fmid;
1333
1334 /* Check if VCAP_AF_ISDX_VAL action is set for this rule - and if
1335 * it is used for stream and/or flow-meter classification.
1336 */
1337 afield = vcap_find_actionfield(vrule, VCAP_AF_ISDX_VAL);
1338 if (!afield)
1339 return;
1340
1341 isdx = afield->data.u32.value;
1342 sfid = sparx5_psfp_isdx_get_sf(sparx5, isdx);
1343
1344 if (!sfid)
1345 return;
1346
1347 fmid = sparx5_psfp_isdx_get_fm(sparx5, isdx);
1348 sgid = sparx5_psfp_sf_get_sg(sparx5, sfid);
1349
1350 if (fmid && sparx5_psfp_fm_del(sparx5, fmid) < 0)
1351 pr_err("%s:%d Could not delete invalid fmid: %d", __func__,
1352 __LINE__, fmid);
1353
1354 if (sgid && sparx5_psfp_sg_del(sparx5, sgid) < 0)
1355 pr_err("%s:%d Could not delete invalid sgid: %d", __func__,
1356 __LINE__, sgid);
1357
1358 if (sparx5_psfp_sf_del(sparx5, sfid) < 0)
1359 pr_err("%s:%d Could not delete invalid sfid: %d", __func__,
1360 __LINE__, sfid);
1361
1362 sparx5_isdx_conf_set(sparx5, isdx, 0, 0);
1363}
1364
1365static int sparx5_tc_free_rule_resources(struct net_device *ndev,
1366 struct vcap_control *vctrl,
1367 int rule_id)
1368{
1369 struct sparx5_port *port = netdev_priv(ndev);
1370 struct sparx5 *sparx5 = port->sparx5;
1371 struct vcap_rule *vrule;
1372 int ret = 0;
1373
1374 vrule = vcap_get_rule(vctrl, rule_id);
1375 if (IS_ERR(vrule))
1376 return -EINVAL;
1377
1378 sparx5_tc_free_psfp_resources(sparx5, vrule);
1379
1380 vcap_free_rule(vrule);
1381 return ret;
1382}
1383
1384static int sparx5_tc_flower_destroy(struct net_device *ndev,
1385 struct flow_cls_offload *fco,
1386 struct vcap_admin *admin)
1387{
1388 struct sparx5_port *port = netdev_priv(ndev);
1389 int err = -ENOENT, count = 0, rule_id;
1390 struct vcap_control *vctrl;
1391
1392 vctrl = port->sparx5->vcap_ctrl;
1393 while (true) {
1394 rule_id = vcap_lookup_rule_by_cookie(vctrl, fco->cookie);
1395 if (rule_id <= 0)
1396 break;
1397 if (count == 0) {
1398 /* Resources are attached to the first rule of
1399 * a set of rules. Only works if the rules are
1400 * in the correct order.
1401 */
1402 err = sparx5_tc_free_rule_resources(ndev, vctrl,
1403 rule_id);
1404 if (err)
1405 pr_err("%s:%d: could not free resources %d\n",
1406 __func__, __LINE__, rule_id);
1407 }
1408 err = vcap_del_rule(vctrl, ndev, rule_id);
1409 if (err) {
1410 pr_err("%s:%d: could not delete rule %d\n",
1411 __func__, __LINE__, rule_id);
1412 break;
1413 }
1414 }
1415 return err;
1416}
1417
1418static int sparx5_tc_flower_stats(struct net_device *ndev,
1419 struct flow_cls_offload *fco,
1420 struct vcap_admin *admin)
1421{
1422 struct sparx5_port *port = netdev_priv(ndev);
1423 struct vcap_counter ctr = {};
1424 struct vcap_control *vctrl;
1425 ulong lastused = 0;
1426 int err;
1427
1428 vctrl = port->sparx5->vcap_ctrl;
1429 err = vcap_get_rule_count_by_cookie(vctrl, &ctr, fco->cookie);
1430 if (err)
1431 return err;
1432 flow_stats_update(&fco->stats, 0x0, ctr.value, 0, lastused,
1433 FLOW_ACTION_HW_STATS_IMMEDIATE);
1434 return err;
1435}
1436
1437static int sparx5_tc_flower_template_create(struct net_device *ndev,
1438 struct flow_cls_offload *fco,
1439 struct vcap_admin *admin)
1440{
1441 struct sparx5_port *port = netdev_priv(ndev);
1442 struct vcap_tc_flower_parse_usage state = {
1443 .fco = fco,
1444 .l3_proto = ETH_P_ALL,
1445 .admin = admin,
1446 };
1447 struct sparx5_tc_flower_template *ftp;
1448 struct vcap_keyset_list kslist = {};
1449 enum vcap_keyfield_set keysets[10];
1450 struct vcap_control *vctrl;
1451 struct vcap_rule *vrule;
1452 int count, err;
1453
1454 if (admin->vtype == VCAP_TYPE_ES0) {
1455 pr_err("%s:%d: %s\n", __func__, __LINE__,
1456 "VCAP does not support templates");
1457 return -EINVAL;
1458 }
1459
1460 count = vcap_admin_rule_count(admin, fco->common.chain_index);
1461 if (count > 0) {
1462 pr_err("%s:%d: %s\n", __func__, __LINE__,
1463 "Filters are already present");
1464 return -EBUSY;
1465 }
1466
1467 ftp = kzalloc(sizeof(*ftp), GFP_KERNEL);
1468 if (!ftp)
1469 return -ENOMEM;
1470
1471 ftp->cid = fco->common.chain_index;
1472 ftp->orig = VCAP_KFS_NO_VALUE;
1473 ftp->keyset = VCAP_KFS_NO_VALUE;
1474
1475 vctrl = port->sparx5->vcap_ctrl;
1476 vrule = vcap_alloc_rule(vctrl, ndev, fco->common.chain_index,
1477 VCAP_USER_TC, fco->common.prio, 0);
1478 if (IS_ERR(vrule)) {
1479 err = PTR_ERR(vrule);
1480 goto err_rule;
1481 }
1482
1483 state.vrule = vrule;
1484 state.frule = flow_cls_offload_flow_rule(fco);
1485 err = sparx5_tc_use_dissectors(&state, admin, vrule);
1486 if (err) {
1487 pr_err("%s:%d: key error: %d\n", __func__, __LINE__, err);
1488 goto out;
1489 }
1490
1491 ftp->l3_proto = state.l3_proto;
1492
1493 sparx5_tc_flower_simplify_rule(admin, vrule, state.l3_proto);
1494
1495 /* Find the keysets that the rule can use */
1496 kslist.keysets = keysets;
1497 kslist.max = ARRAY_SIZE(keysets);
1498 if (!vcap_rule_find_keysets(vrule, &kslist)) {
1499 pr_err("%s:%d: %s\n", __func__, __LINE__,
1500 "Could not find a suitable keyset");
1501 err = -ENOENT;
1502 goto out;
1503 }
1504
1505 ftp->keyset = vcap_select_min_rule_keyset(vctrl, admin->vtype, &kslist);
1506 kslist.cnt = 0;
1507 sparx5_vcap_set_port_keyset(ndev, admin, fco->common.chain_index,
1508 state.l3_proto,
1509 ftp->keyset,
1510 &kslist);
1511
1512 if (kslist.cnt > 0)
1513 ftp->orig = kslist.keysets[0];
1514
1515 /* Store new template */
1516 list_add_tail(&ftp->list, &port->tc_templates);
1517 vcap_free_rule(vrule);
1518 return 0;
1519
1520out:
1521 vcap_free_rule(vrule);
1522err_rule:
1523 kfree(ftp);
1524 return err;
1525}
1526
1527static int sparx5_tc_flower_template_destroy(struct net_device *ndev,
1528 struct flow_cls_offload *fco,
1529 struct vcap_admin *admin)
1530{
1531 struct sparx5_port *port = netdev_priv(ndev);
1532 struct sparx5_tc_flower_template *ftp, *tmp;
1533 int err = -ENOENT;
1534
1535 /* Rules using the template are removed by the tc framework */
1536 list_for_each_entry_safe(ftp, tmp, &port->tc_templates, list) {
1537 if (ftp->cid != fco->common.chain_index)
1538 continue;
1539
1540 sparx5_vcap_set_port_keyset(ndev, admin,
1541 fco->common.chain_index,
1542 ftp->l3_proto, ftp->orig,
1543 NULL);
1544 list_del(&ftp->list);
1545 kfree(ftp);
1546 break;
1547 }
1548 return err;
1549}
1550
1551int sparx5_tc_flower(struct net_device *ndev, struct flow_cls_offload *fco,
1552 bool ingress)
1553{
1554 struct sparx5_port *port = netdev_priv(ndev);
1555 struct vcap_control *vctrl;
1556 struct vcap_admin *admin;
1557 int err = -EINVAL;
1558
1559 /* Get vcap instance from the chain id */
1560 vctrl = port->sparx5->vcap_ctrl;
1561 admin = vcap_find_admin(vctrl, fco->common.chain_index);
1562 if (!admin) {
1563 NL_SET_ERR_MSG_MOD(fco->common.extack, "Invalid chain");
1564 return err;
1565 }
1566
1567 switch (fco->command) {
1568 case FLOW_CLS_REPLACE:
1569 return sparx5_tc_flower_replace(ndev, fco, admin, ingress);
1570 case FLOW_CLS_DESTROY:
1571 return sparx5_tc_flower_destroy(ndev, fco, admin);
1572 case FLOW_CLS_STATS:
1573 return sparx5_tc_flower_stats(ndev, fco, admin);
1574 case FLOW_CLS_TMPLT_CREATE:
1575 return sparx5_tc_flower_template_create(ndev, fco, admin);
1576 case FLOW_CLS_TMPLT_DESTROY:
1577 return sparx5_tc_flower_template_destroy(ndev, fco, admin);
1578 default:
1579 return -EOPNOTSUPP;
1580 }
1581}