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8#include <linux/netdevice.h>
9#include <linux/etherdevice.h>
10#include <linux/inetdevice.h>
11#include <linux/rhashtable.h>
12#include <linux/bitfield.h>
13#include <net/flow_dissector.h>
14#include <net/pkt_cls.h>
15#include <net/tc_act/tc_gact.h>
16#include <net/tc_act/tc_mirred.h>
17#include <net/tc_act/tc_vlan.h>
18#include <net/ipv6.h>
19
20#include "cn10k.h"
21#include "otx2_common.h"
22
23
24#define MAX_BURST_EXPONENT 0x0FULL
25#define MAX_BURST_MANTISSA 0xFFULL
26#define MAX_BURST_SIZE 130816ULL
27#define MAX_RATE_DIVIDER_EXPONENT 12ULL
28#define MAX_RATE_EXPONENT 0x0FULL
29#define MAX_RATE_MANTISSA 0xFFULL
30
31
32#define TLX_RATE_MANTISSA GENMASK_ULL(8, 1)
33#define TLX_RATE_EXPONENT GENMASK_ULL(12, 9)
34#define TLX_RATE_DIVIDER_EXPONENT GENMASK_ULL(16, 13)
35#define TLX_BURST_MANTISSA GENMASK_ULL(36, 29)
36#define TLX_BURST_EXPONENT GENMASK_ULL(40, 37)
37
38struct otx2_tc_flow_stats {
39 u64 bytes;
40 u64 pkts;
41 u64 used;
42};
43
44struct otx2_tc_flow {
45 struct rhash_head node;
46 unsigned long cookie;
47 unsigned int bitpos;
48 struct rcu_head rcu;
49 struct otx2_tc_flow_stats stats;
50 spinlock_t lock;
51 u16 rq;
52 u16 entry;
53 u16 leaf_profile;
54 bool is_act_police;
55};
56
57int otx2_tc_alloc_ent_bitmap(struct otx2_nic *nic)
58{
59 struct otx2_tc_info *tc = &nic->tc_info;
60
61 if (!nic->flow_cfg->max_flows || is_otx2_vf(nic->pcifunc))
62 return 0;
63
64
65 kfree(tc->tc_entries_bitmap);
66
67 tc->tc_entries_bitmap =
68 kcalloc(BITS_TO_LONGS(nic->flow_cfg->max_flows),
69 sizeof(long), GFP_KERNEL);
70 if (!tc->tc_entries_bitmap) {
71 netdev_err(nic->netdev,
72 "Unable to alloc TC flow entries bitmap\n");
73 return -ENOMEM;
74 }
75
76 return 0;
77}
78EXPORT_SYMBOL(otx2_tc_alloc_ent_bitmap);
79
80static void otx2_get_egress_burst_cfg(u32 burst, u32 *burst_exp,
81 u32 *burst_mantissa)
82{
83 unsigned int tmp;
84
85
86
87
88
89 burst = min_t(u32, burst, MAX_BURST_SIZE);
90 if (burst) {
91 *burst_exp = ilog2(burst) ? ilog2(burst) - 1 : 0;
92 tmp = burst - rounddown_pow_of_two(burst);
93 if (burst < MAX_BURST_MANTISSA)
94 *burst_mantissa = tmp * 2;
95 else
96 *burst_mantissa = tmp / (1ULL << (*burst_exp - 7));
97 } else {
98 *burst_exp = MAX_BURST_EXPONENT;
99 *burst_mantissa = MAX_BURST_MANTISSA;
100 }
101}
102
103static void otx2_get_egress_rate_cfg(u32 maxrate, u32 *exp,
104 u32 *mantissa, u32 *div_exp)
105{
106 unsigned int tmp;
107
108
109
110
111
112
113
114
115
116
117
118
119 *div_exp = 0;
120
121 if (maxrate) {
122 *exp = ilog2(maxrate) ? ilog2(maxrate) - 1 : 0;
123 tmp = maxrate - rounddown_pow_of_two(maxrate);
124 if (maxrate < MAX_RATE_MANTISSA)
125 *mantissa = tmp * 2;
126 else
127 *mantissa = tmp / (1ULL << (*exp - 7));
128 } else {
129
130 *exp = MAX_RATE_EXPONENT;
131 *mantissa = MAX_RATE_MANTISSA;
132 }
133}
134
135static int otx2_set_matchall_egress_rate(struct otx2_nic *nic, u32 burst, u32 maxrate)
136{
137 struct otx2_hw *hw = &nic->hw;
138 struct nix_txschq_config *req;
139 u32 burst_exp, burst_mantissa;
140 u32 exp, mantissa, div_exp;
141 int txschq, err;
142
143
144 txschq = hw->txschq_list[NIX_TXSCH_LVL_TL4][0];
145
146
147 otx2_get_egress_burst_cfg(burst, &burst_exp, &burst_mantissa);
148 otx2_get_egress_rate_cfg(maxrate, &exp, &mantissa, &div_exp);
149
150 mutex_lock(&nic->mbox.lock);
151 req = otx2_mbox_alloc_msg_nix_txschq_cfg(&nic->mbox);
152 if (!req) {
153 mutex_unlock(&nic->mbox.lock);
154 return -ENOMEM;
155 }
156
157 req->lvl = NIX_TXSCH_LVL_TL4;
158 req->num_regs = 1;
159 req->reg[0] = NIX_AF_TL4X_PIR(txschq);
160 req->regval[0] = FIELD_PREP(TLX_BURST_EXPONENT, burst_exp) |
161 FIELD_PREP(TLX_BURST_MANTISSA, burst_mantissa) |
162 FIELD_PREP(TLX_RATE_DIVIDER_EXPONENT, div_exp) |
163 FIELD_PREP(TLX_RATE_EXPONENT, exp) |
164 FIELD_PREP(TLX_RATE_MANTISSA, mantissa) | BIT_ULL(0);
165
166 err = otx2_sync_mbox_msg(&nic->mbox);
167 mutex_unlock(&nic->mbox.lock);
168 return err;
169}
170
171static int otx2_tc_validate_flow(struct otx2_nic *nic,
172 struct flow_action *actions,
173 struct netlink_ext_ack *extack)
174{
175 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
176 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
177 return -EINVAL;
178 }
179
180 if (!flow_action_has_entries(actions)) {
181 NL_SET_ERR_MSG_MOD(extack, "MATCHALL offload called with no action");
182 return -EINVAL;
183 }
184
185 if (!flow_offload_has_one_action(actions)) {
186 NL_SET_ERR_MSG_MOD(extack,
187 "Egress MATCHALL offload supports only 1 policing action");
188 return -EINVAL;
189 }
190 return 0;
191}
192
193static int otx2_tc_egress_matchall_install(struct otx2_nic *nic,
194 struct tc_cls_matchall_offload *cls)
195{
196 struct netlink_ext_ack *extack = cls->common.extack;
197 struct flow_action *actions = &cls->rule->action;
198 struct flow_action_entry *entry;
199 u32 rate;
200 int err;
201
202 err = otx2_tc_validate_flow(nic, actions, extack);
203 if (err)
204 return err;
205
206 if (nic->flags & OTX2_FLAG_TC_MATCHALL_EGRESS_ENABLED) {
207 NL_SET_ERR_MSG_MOD(extack,
208 "Only one Egress MATCHALL ratelimiter can be offloaded");
209 return -ENOMEM;
210 }
211
212 entry = &cls->rule->action.entries[0];
213 switch (entry->id) {
214 case FLOW_ACTION_POLICE:
215 if (entry->police.rate_pkt_ps) {
216 NL_SET_ERR_MSG_MOD(extack, "QoS offload not support packets per second");
217 return -EOPNOTSUPP;
218 }
219
220 rate = entry->police.rate_bytes_ps * 8;
221 rate = max_t(u32, rate / 1000000, 1);
222 err = otx2_set_matchall_egress_rate(nic, entry->police.burst, rate);
223 if (err)
224 return err;
225 nic->flags |= OTX2_FLAG_TC_MATCHALL_EGRESS_ENABLED;
226 break;
227 default:
228 NL_SET_ERR_MSG_MOD(extack,
229 "Only police action is supported with Egress MATCHALL offload");
230 return -EOPNOTSUPP;
231 }
232
233 return 0;
234}
235
236static int otx2_tc_egress_matchall_delete(struct otx2_nic *nic,
237 struct tc_cls_matchall_offload *cls)
238{
239 struct netlink_ext_ack *extack = cls->common.extack;
240 int err;
241
242 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
243 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
244 return -EINVAL;
245 }
246
247 err = otx2_set_matchall_egress_rate(nic, 0, 0);
248 nic->flags &= ~OTX2_FLAG_TC_MATCHALL_EGRESS_ENABLED;
249 return err;
250}
251
252static int otx2_tc_act_set_police(struct otx2_nic *nic,
253 struct otx2_tc_flow *node,
254 struct flow_cls_offload *f,
255 u64 rate, u32 burst, u32 mark,
256 struct npc_install_flow_req *req, bool pps)
257{
258 struct netlink_ext_ack *extack = f->common.extack;
259 struct otx2_hw *hw = &nic->hw;
260 int rq_idx, rc;
261
262 rq_idx = find_first_zero_bit(&nic->rq_bmap, hw->rx_queues);
263 if (rq_idx >= hw->rx_queues) {
264 NL_SET_ERR_MSG_MOD(extack, "Police action rules exceeded");
265 return -EINVAL;
266 }
267
268 mutex_lock(&nic->mbox.lock);
269
270 rc = cn10k_alloc_leaf_profile(nic, &node->leaf_profile);
271 if (rc) {
272 mutex_unlock(&nic->mbox.lock);
273 return rc;
274 }
275
276 rc = cn10k_set_ipolicer_rate(nic, node->leaf_profile, burst, rate, pps);
277 if (rc)
278 goto free_leaf;
279
280 rc = cn10k_map_unmap_rq_policer(nic, rq_idx, node->leaf_profile, true);
281 if (rc)
282 goto free_leaf;
283
284 mutex_unlock(&nic->mbox.lock);
285
286 req->match_id = mark & 0xFFFFULL;
287 req->index = rq_idx;
288 req->op = NIX_RX_ACTIONOP_UCAST;
289 set_bit(rq_idx, &nic->rq_bmap);
290 node->is_act_police = true;
291 node->rq = rq_idx;
292
293 return 0;
294
295free_leaf:
296 if (cn10k_free_leaf_profile(nic, node->leaf_profile))
297 netdev_err(nic->netdev,
298 "Unable to free leaf bandwidth profile(%d)\n",
299 node->leaf_profile);
300 mutex_unlock(&nic->mbox.lock);
301 return rc;
302}
303
304static int otx2_tc_parse_actions(struct otx2_nic *nic,
305 struct flow_action *flow_action,
306 struct npc_install_flow_req *req,
307 struct flow_cls_offload *f,
308 struct otx2_tc_flow *node)
309{
310 struct netlink_ext_ack *extack = f->common.extack;
311 struct flow_action_entry *act;
312 struct net_device *target;
313 struct otx2_nic *priv;
314 u32 burst, mark = 0;
315 u8 nr_police = 0;
316 bool pps = false;
317 u64 rate;
318 int i;
319
320 if (!flow_action_has_entries(flow_action)) {
321 NL_SET_ERR_MSG_MOD(extack, "no tc actions specified");
322 return -EINVAL;
323 }
324
325 flow_action_for_each(i, act, flow_action) {
326 switch (act->id) {
327 case FLOW_ACTION_DROP:
328 req->op = NIX_RX_ACTIONOP_DROP;
329 return 0;
330 case FLOW_ACTION_ACCEPT:
331 req->op = NIX_RX_ACTION_DEFAULT;
332 return 0;
333 case FLOW_ACTION_REDIRECT_INGRESS:
334 target = act->dev;
335 priv = netdev_priv(target);
336
337 if (rvu_get_pf(nic->pcifunc) != rvu_get_pf(priv->pcifunc)) {
338 NL_SET_ERR_MSG_MOD(extack,
339 "can't redirect to other pf/vf");
340 return -EOPNOTSUPP;
341 }
342 req->vf = priv->pcifunc & RVU_PFVF_FUNC_MASK;
343 req->op = NIX_RX_ACTION_DEFAULT;
344 return 0;
345 case FLOW_ACTION_VLAN_POP:
346 req->vtag0_valid = true;
347
348 req->vtag0_type = NIX_AF_LFX_RX_VTAG_TYPE7;
349 break;
350 case FLOW_ACTION_POLICE:
351
352 if (is_dev_otx2(nic->pdev)) {
353 NL_SET_ERR_MSG_MOD(extack,
354 "Ingress policing not supported on this platform");
355 return -EOPNOTSUPP;
356 }
357
358 if (act->police.rate_bytes_ps > 0) {
359 rate = act->police.rate_bytes_ps * 8;
360 burst = act->police.burst;
361 } else if (act->police.rate_pkt_ps > 0) {
362
363
364
365
366
367 rate = act->police.rate_pkt_ps * 8;
368 burst = act->police.burst_pkt;
369 pps = true;
370 }
371 nr_police++;
372 break;
373 case FLOW_ACTION_MARK:
374 mark = act->mark;
375 break;
376 default:
377 return -EOPNOTSUPP;
378 }
379 }
380
381 if (nr_police > 1) {
382 NL_SET_ERR_MSG_MOD(extack,
383 "rate limit police offload requires a single action");
384 return -EOPNOTSUPP;
385 }
386
387 if (nr_police)
388 return otx2_tc_act_set_police(nic, node, f, rate, burst,
389 mark, req, pps);
390
391 return 0;
392}
393
394static int otx2_tc_prepare_flow(struct otx2_nic *nic, struct otx2_tc_flow *node,
395 struct flow_cls_offload *f,
396 struct npc_install_flow_req *req)
397{
398 struct netlink_ext_ack *extack = f->common.extack;
399 struct flow_msg *flow_spec = &req->packet;
400 struct flow_msg *flow_mask = &req->mask;
401 struct flow_dissector *dissector;
402 struct flow_rule *rule;
403 u8 ip_proto = 0;
404
405 rule = flow_cls_offload_flow_rule(f);
406 dissector = rule->match.dissector;
407
408 if ((dissector->used_keys &
409 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
410 BIT(FLOW_DISSECTOR_KEY_BASIC) |
411 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
412 BIT(FLOW_DISSECTOR_KEY_VLAN) |
413 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
414 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
415 BIT(FLOW_DISSECTOR_KEY_PORTS) |
416 BIT(FLOW_DISSECTOR_KEY_IP)))) {
417 netdev_info(nic->netdev, "unsupported flow used key 0x%x",
418 dissector->used_keys);
419 return -EOPNOTSUPP;
420 }
421
422 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
423 struct flow_match_basic match;
424
425 flow_rule_match_basic(rule, &match);
426
427
428 flow_spec->etype = match.key->n_proto;
429 flow_mask->etype = match.mask->n_proto;
430 req->features |= BIT_ULL(NPC_ETYPE);
431
432 if (match.mask->ip_proto &&
433 (match.key->ip_proto != IPPROTO_TCP &&
434 match.key->ip_proto != IPPROTO_UDP &&
435 match.key->ip_proto != IPPROTO_SCTP &&
436 match.key->ip_proto != IPPROTO_ICMP &&
437 match.key->ip_proto != IPPROTO_ICMPV6)) {
438 netdev_info(nic->netdev,
439 "ip_proto=0x%x not supported\n",
440 match.key->ip_proto);
441 return -EOPNOTSUPP;
442 }
443 if (match.mask->ip_proto)
444 ip_proto = match.key->ip_proto;
445
446 if (ip_proto == IPPROTO_UDP)
447 req->features |= BIT_ULL(NPC_IPPROTO_UDP);
448 else if (ip_proto == IPPROTO_TCP)
449 req->features |= BIT_ULL(NPC_IPPROTO_TCP);
450 else if (ip_proto == IPPROTO_SCTP)
451 req->features |= BIT_ULL(NPC_IPPROTO_SCTP);
452 else if (ip_proto == IPPROTO_ICMP)
453 req->features |= BIT_ULL(NPC_IPPROTO_ICMP);
454 else if (ip_proto == IPPROTO_ICMPV6)
455 req->features |= BIT_ULL(NPC_IPPROTO_ICMP6);
456 }
457
458 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
459 struct flow_match_eth_addrs match;
460
461 flow_rule_match_eth_addrs(rule, &match);
462 if (!is_zero_ether_addr(match.mask->src)) {
463 NL_SET_ERR_MSG_MOD(extack, "src mac match not supported");
464 return -EOPNOTSUPP;
465 }
466
467 if (!is_zero_ether_addr(match.mask->dst)) {
468 ether_addr_copy(flow_spec->dmac, (u8 *)&match.key->dst);
469 ether_addr_copy(flow_mask->dmac,
470 (u8 *)&match.mask->dst);
471 req->features |= BIT_ULL(NPC_DMAC);
472 }
473 }
474
475 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) {
476 struct flow_match_ip match;
477
478 flow_rule_match_ip(rule, &match);
479 if ((ntohs(flow_spec->etype) != ETH_P_IP) &&
480 match.mask->tos) {
481 NL_SET_ERR_MSG_MOD(extack, "tos not supported");
482 return -EOPNOTSUPP;
483 }
484 if (match.mask->ttl) {
485 NL_SET_ERR_MSG_MOD(extack, "ttl not supported");
486 return -EOPNOTSUPP;
487 }
488 flow_spec->tos = match.key->tos;
489 flow_mask->tos = match.mask->tos;
490 req->features |= BIT_ULL(NPC_TOS);
491 }
492
493 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
494 struct flow_match_vlan match;
495 u16 vlan_tci, vlan_tci_mask;
496
497 flow_rule_match_vlan(rule, &match);
498
499 if (ntohs(match.key->vlan_tpid) != ETH_P_8021Q) {
500 netdev_err(nic->netdev, "vlan tpid 0x%x not supported\n",
501 ntohs(match.key->vlan_tpid));
502 return -EOPNOTSUPP;
503 }
504
505 if (match.mask->vlan_id ||
506 match.mask->vlan_dei ||
507 match.mask->vlan_priority) {
508 vlan_tci = match.key->vlan_id |
509 match.key->vlan_dei << 12 |
510 match.key->vlan_priority << 13;
511
512 vlan_tci_mask = match.mask->vlan_id |
513 match.mask->vlan_dei << 12 |
514 match.mask->vlan_priority << 13;
515
516 flow_spec->vlan_tci = htons(vlan_tci);
517 flow_mask->vlan_tci = htons(vlan_tci_mask);
518 req->features |= BIT_ULL(NPC_OUTER_VID);
519 }
520 }
521
522 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
523 struct flow_match_ipv4_addrs match;
524
525 flow_rule_match_ipv4_addrs(rule, &match);
526
527 flow_spec->ip4dst = match.key->dst;
528 flow_mask->ip4dst = match.mask->dst;
529 req->features |= BIT_ULL(NPC_DIP_IPV4);
530
531 flow_spec->ip4src = match.key->src;
532 flow_mask->ip4src = match.mask->src;
533 req->features |= BIT_ULL(NPC_SIP_IPV4);
534 } else if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
535 struct flow_match_ipv6_addrs match;
536
537 flow_rule_match_ipv6_addrs(rule, &match);
538
539 if (ipv6_addr_loopback(&match.key->dst) ||
540 ipv6_addr_loopback(&match.key->src)) {
541 NL_SET_ERR_MSG_MOD(extack,
542 "Flow matching IPv6 loopback addr not supported");
543 return -EOPNOTSUPP;
544 }
545
546 if (!ipv6_addr_any(&match.mask->dst)) {
547 memcpy(&flow_spec->ip6dst,
548 (struct in6_addr *)&match.key->dst,
549 sizeof(flow_spec->ip6dst));
550 memcpy(&flow_mask->ip6dst,
551 (struct in6_addr *)&match.mask->dst,
552 sizeof(flow_spec->ip6dst));
553 req->features |= BIT_ULL(NPC_DIP_IPV6);
554 }
555
556 if (!ipv6_addr_any(&match.mask->src)) {
557 memcpy(&flow_spec->ip6src,
558 (struct in6_addr *)&match.key->src,
559 sizeof(flow_spec->ip6src));
560 memcpy(&flow_mask->ip6src,
561 (struct in6_addr *)&match.mask->src,
562 sizeof(flow_spec->ip6src));
563 req->features |= BIT_ULL(NPC_SIP_IPV6);
564 }
565 }
566
567 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
568 struct flow_match_ports match;
569
570 flow_rule_match_ports(rule, &match);
571
572 flow_spec->dport = match.key->dst;
573 flow_mask->dport = match.mask->dst;
574 if (ip_proto == IPPROTO_UDP)
575 req->features |= BIT_ULL(NPC_DPORT_UDP);
576 else if (ip_proto == IPPROTO_TCP)
577 req->features |= BIT_ULL(NPC_DPORT_TCP);
578 else if (ip_proto == IPPROTO_SCTP)
579 req->features |= BIT_ULL(NPC_DPORT_SCTP);
580
581 flow_spec->sport = match.key->src;
582 flow_mask->sport = match.mask->src;
583 if (ip_proto == IPPROTO_UDP)
584 req->features |= BIT_ULL(NPC_SPORT_UDP);
585 else if (ip_proto == IPPROTO_TCP)
586 req->features |= BIT_ULL(NPC_SPORT_TCP);
587 else if (ip_proto == IPPROTO_SCTP)
588 req->features |= BIT_ULL(NPC_SPORT_SCTP);
589 }
590
591 return otx2_tc_parse_actions(nic, &rule->action, req, f, node);
592}
593
594static int otx2_del_mcam_flow_entry(struct otx2_nic *nic, u16 entry)
595{
596 struct npc_delete_flow_req *req;
597 int err;
598
599 mutex_lock(&nic->mbox.lock);
600 req = otx2_mbox_alloc_msg_npc_delete_flow(&nic->mbox);
601 if (!req) {
602 mutex_unlock(&nic->mbox.lock);
603 return -ENOMEM;
604 }
605
606 req->entry = entry;
607
608
609 err = otx2_sync_mbox_msg(&nic->mbox);
610 if (err) {
611 netdev_err(nic->netdev, "Failed to delete MCAM flow entry %d\n",
612 entry);
613 mutex_unlock(&nic->mbox.lock);
614 return -EFAULT;
615 }
616 mutex_unlock(&nic->mbox.lock);
617
618 return 0;
619}
620
621static int otx2_tc_del_flow(struct otx2_nic *nic,
622 struct flow_cls_offload *tc_flow_cmd)
623{
624 struct otx2_flow_config *flow_cfg = nic->flow_cfg;
625 struct otx2_tc_info *tc_info = &nic->tc_info;
626 struct otx2_tc_flow *flow_node;
627 int err;
628
629 flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
630 &tc_flow_cmd->cookie,
631 tc_info->flow_ht_params);
632 if (!flow_node) {
633 netdev_err(nic->netdev, "tc flow not found for cookie 0x%lx\n",
634 tc_flow_cmd->cookie);
635 return -EINVAL;
636 }
637
638 if (flow_node->is_act_police) {
639 mutex_lock(&nic->mbox.lock);
640
641 err = cn10k_map_unmap_rq_policer(nic, flow_node->rq,
642 flow_node->leaf_profile, false);
643 if (err)
644 netdev_err(nic->netdev,
645 "Unmapping RQ %d & profile %d failed\n",
646 flow_node->rq, flow_node->leaf_profile);
647
648 err = cn10k_free_leaf_profile(nic, flow_node->leaf_profile);
649 if (err)
650 netdev_err(nic->netdev,
651 "Unable to free leaf bandwidth profile(%d)\n",
652 flow_node->leaf_profile);
653
654 __clear_bit(flow_node->rq, &nic->rq_bmap);
655
656 mutex_unlock(&nic->mbox.lock);
657 }
658
659 otx2_del_mcam_flow_entry(nic, flow_node->entry);
660
661 WARN_ON(rhashtable_remove_fast(&nic->tc_info.flow_table,
662 &flow_node->node,
663 nic->tc_info.flow_ht_params));
664 kfree_rcu(flow_node, rcu);
665
666 clear_bit(flow_node->bitpos, tc_info->tc_entries_bitmap);
667 flow_cfg->nr_flows--;
668
669 return 0;
670}
671
672static int otx2_tc_add_flow(struct otx2_nic *nic,
673 struct flow_cls_offload *tc_flow_cmd)
674{
675 struct netlink_ext_ack *extack = tc_flow_cmd->common.extack;
676 struct otx2_flow_config *flow_cfg = nic->flow_cfg;
677 struct otx2_tc_info *tc_info = &nic->tc_info;
678 struct otx2_tc_flow *new_node, *old_node;
679 struct npc_install_flow_req *req, dummy;
680 int rc, err;
681
682 if (!(nic->flags & OTX2_FLAG_TC_FLOWER_SUPPORT))
683 return -ENOMEM;
684
685 if (bitmap_full(tc_info->tc_entries_bitmap, flow_cfg->max_flows)) {
686 NL_SET_ERR_MSG_MOD(extack,
687 "Free MCAM entry not available to add the flow");
688 return -ENOMEM;
689 }
690
691
692 new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
693 if (!new_node)
694 return -ENOMEM;
695 spin_lock_init(&new_node->lock);
696 new_node->cookie = tc_flow_cmd->cookie;
697
698 memset(&dummy, 0, sizeof(struct npc_install_flow_req));
699
700 rc = otx2_tc_prepare_flow(nic, new_node, tc_flow_cmd, &dummy);
701 if (rc) {
702 kfree_rcu(new_node, rcu);
703 return rc;
704 }
705
706
707 old_node = rhashtable_lookup_fast(&tc_info->flow_table,
708 &tc_flow_cmd->cookie,
709 tc_info->flow_ht_params);
710 if (old_node)
711 otx2_tc_del_flow(nic, tc_flow_cmd);
712
713 mutex_lock(&nic->mbox.lock);
714 req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
715 if (!req) {
716 mutex_unlock(&nic->mbox.lock);
717 rc = -ENOMEM;
718 goto free_leaf;
719 }
720
721 memcpy(&dummy.hdr, &req->hdr, sizeof(struct mbox_msghdr));
722 memcpy(req, &dummy, sizeof(struct npc_install_flow_req));
723
724 new_node->bitpos = find_first_zero_bit(tc_info->tc_entries_bitmap,
725 flow_cfg->max_flows);
726 req->channel = nic->hw.rx_chan_base;
727 req->entry = flow_cfg->flow_ent[flow_cfg->max_flows - new_node->bitpos - 1];
728 req->intf = NIX_INTF_RX;
729 req->set_cntr = 1;
730 new_node->entry = req->entry;
731
732
733 rc = otx2_sync_mbox_msg(&nic->mbox);
734 if (rc) {
735 NL_SET_ERR_MSG_MOD(extack, "Failed to install MCAM flow entry");
736 mutex_unlock(&nic->mbox.lock);
737 kfree_rcu(new_node, rcu);
738 goto free_leaf;
739 }
740 mutex_unlock(&nic->mbox.lock);
741
742
743 rc = rhashtable_insert_fast(&nic->tc_info.flow_table, &new_node->node,
744 nic->tc_info.flow_ht_params);
745 if (rc) {
746 otx2_del_mcam_flow_entry(nic, req->entry);
747 kfree_rcu(new_node, rcu);
748 goto free_leaf;
749 }
750
751 set_bit(new_node->bitpos, tc_info->tc_entries_bitmap);
752 flow_cfg->nr_flows++;
753
754 return 0;
755
756free_leaf:
757 if (new_node->is_act_police) {
758 mutex_lock(&nic->mbox.lock);
759
760 err = cn10k_map_unmap_rq_policer(nic, new_node->rq,
761 new_node->leaf_profile, false);
762 if (err)
763 netdev_err(nic->netdev,
764 "Unmapping RQ %d & profile %d failed\n",
765 new_node->rq, new_node->leaf_profile);
766 err = cn10k_free_leaf_profile(nic, new_node->leaf_profile);
767 if (err)
768 netdev_err(nic->netdev,
769 "Unable to free leaf bandwidth profile(%d)\n",
770 new_node->leaf_profile);
771
772 __clear_bit(new_node->rq, &nic->rq_bmap);
773
774 mutex_unlock(&nic->mbox.lock);
775 }
776
777 return rc;
778}
779
780static int otx2_tc_get_flow_stats(struct otx2_nic *nic,
781 struct flow_cls_offload *tc_flow_cmd)
782{
783 struct otx2_tc_info *tc_info = &nic->tc_info;
784 struct npc_mcam_get_stats_req *req;
785 struct npc_mcam_get_stats_rsp *rsp;
786 struct otx2_tc_flow_stats *stats;
787 struct otx2_tc_flow *flow_node;
788 int err;
789
790 flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
791 &tc_flow_cmd->cookie,
792 tc_info->flow_ht_params);
793 if (!flow_node) {
794 netdev_info(nic->netdev, "tc flow not found for cookie %lx",
795 tc_flow_cmd->cookie);
796 return -EINVAL;
797 }
798
799 mutex_lock(&nic->mbox.lock);
800
801 req = otx2_mbox_alloc_msg_npc_mcam_entry_stats(&nic->mbox);
802 if (!req) {
803 mutex_unlock(&nic->mbox.lock);
804 return -ENOMEM;
805 }
806
807 req->entry = flow_node->entry;
808
809 err = otx2_sync_mbox_msg(&nic->mbox);
810 if (err) {
811 netdev_err(nic->netdev, "Failed to get stats for MCAM flow entry %d\n",
812 req->entry);
813 mutex_unlock(&nic->mbox.lock);
814 return -EFAULT;
815 }
816
817 rsp = (struct npc_mcam_get_stats_rsp *)otx2_mbox_get_rsp
818 (&nic->mbox.mbox, 0, &req->hdr);
819 if (IS_ERR(rsp)) {
820 mutex_unlock(&nic->mbox.lock);
821 return PTR_ERR(rsp);
822 }
823
824 mutex_unlock(&nic->mbox.lock);
825
826 if (!rsp->stat_ena)
827 return -EINVAL;
828
829 stats = &flow_node->stats;
830
831 spin_lock(&flow_node->lock);
832 flow_stats_update(&tc_flow_cmd->stats, 0x0, rsp->stat - stats->pkts, 0x0, 0x0,
833 FLOW_ACTION_HW_STATS_IMMEDIATE);
834 stats->pkts = rsp->stat;
835 spin_unlock(&flow_node->lock);
836
837 return 0;
838}
839
840static int otx2_setup_tc_cls_flower(struct otx2_nic *nic,
841 struct flow_cls_offload *cls_flower)
842{
843 switch (cls_flower->command) {
844 case FLOW_CLS_REPLACE:
845 return otx2_tc_add_flow(nic, cls_flower);
846 case FLOW_CLS_DESTROY:
847 return otx2_tc_del_flow(nic, cls_flower);
848 case FLOW_CLS_STATS:
849 return otx2_tc_get_flow_stats(nic, cls_flower);
850 default:
851 return -EOPNOTSUPP;
852 }
853}
854
855static int otx2_tc_ingress_matchall_install(struct otx2_nic *nic,
856 struct tc_cls_matchall_offload *cls)
857{
858 struct netlink_ext_ack *extack = cls->common.extack;
859 struct flow_action *actions = &cls->rule->action;
860 struct flow_action_entry *entry;
861 u64 rate;
862 int err;
863
864 err = otx2_tc_validate_flow(nic, actions, extack);
865 if (err)
866 return err;
867
868 if (nic->flags & OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED) {
869 NL_SET_ERR_MSG_MOD(extack,
870 "Only one ingress MATCHALL ratelimitter can be offloaded");
871 return -ENOMEM;
872 }
873
874 entry = &cls->rule->action.entries[0];
875 switch (entry->id) {
876 case FLOW_ACTION_POLICE:
877
878 if (is_dev_otx2(nic->pdev)) {
879 NL_SET_ERR_MSG_MOD(extack,
880 "Ingress policing not supported on this platform");
881 return -EOPNOTSUPP;
882 }
883
884 err = cn10k_alloc_matchall_ipolicer(nic);
885 if (err)
886 return err;
887
888
889 rate = entry->police.rate_bytes_ps * 8;
890 err = cn10k_set_matchall_ipolicer_rate(nic, entry->police.burst, rate);
891 if (err)
892 return err;
893 nic->flags |= OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED;
894 break;
895 default:
896 NL_SET_ERR_MSG_MOD(extack,
897 "Only police action supported with Ingress MATCHALL offload");
898 return -EOPNOTSUPP;
899 }
900
901 return 0;
902}
903
904static int otx2_tc_ingress_matchall_delete(struct otx2_nic *nic,
905 struct tc_cls_matchall_offload *cls)
906{
907 struct netlink_ext_ack *extack = cls->common.extack;
908 int err;
909
910 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
911 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
912 return -EINVAL;
913 }
914
915 err = cn10k_free_matchall_ipolicer(nic);
916 nic->flags &= ~OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED;
917 return err;
918}
919
920static int otx2_setup_tc_ingress_matchall(struct otx2_nic *nic,
921 struct tc_cls_matchall_offload *cls_matchall)
922{
923 switch (cls_matchall->command) {
924 case TC_CLSMATCHALL_REPLACE:
925 return otx2_tc_ingress_matchall_install(nic, cls_matchall);
926 case TC_CLSMATCHALL_DESTROY:
927 return otx2_tc_ingress_matchall_delete(nic, cls_matchall);
928 case TC_CLSMATCHALL_STATS:
929 default:
930 break;
931 }
932
933 return -EOPNOTSUPP;
934}
935
936static int otx2_setup_tc_block_ingress_cb(enum tc_setup_type type,
937 void *type_data, void *cb_priv)
938{
939 struct otx2_nic *nic = cb_priv;
940
941 if (!tc_cls_can_offload_and_chain0(nic->netdev, type_data))
942 return -EOPNOTSUPP;
943
944 switch (type) {
945 case TC_SETUP_CLSFLOWER:
946 return otx2_setup_tc_cls_flower(nic, type_data);
947 case TC_SETUP_CLSMATCHALL:
948 return otx2_setup_tc_ingress_matchall(nic, type_data);
949 default:
950 break;
951 }
952
953 return -EOPNOTSUPP;
954}
955
956static int otx2_setup_tc_egress_matchall(struct otx2_nic *nic,
957 struct tc_cls_matchall_offload *cls_matchall)
958{
959 switch (cls_matchall->command) {
960 case TC_CLSMATCHALL_REPLACE:
961 return otx2_tc_egress_matchall_install(nic, cls_matchall);
962 case TC_CLSMATCHALL_DESTROY:
963 return otx2_tc_egress_matchall_delete(nic, cls_matchall);
964 case TC_CLSMATCHALL_STATS:
965 default:
966 break;
967 }
968
969 return -EOPNOTSUPP;
970}
971
972static int otx2_setup_tc_block_egress_cb(enum tc_setup_type type,
973 void *type_data, void *cb_priv)
974{
975 struct otx2_nic *nic = cb_priv;
976
977 if (!tc_cls_can_offload_and_chain0(nic->netdev, type_data))
978 return -EOPNOTSUPP;
979
980 switch (type) {
981 case TC_SETUP_CLSMATCHALL:
982 return otx2_setup_tc_egress_matchall(nic, type_data);
983 default:
984 break;
985 }
986
987 return -EOPNOTSUPP;
988}
989
990static LIST_HEAD(otx2_block_cb_list);
991
992static int otx2_setup_tc_block(struct net_device *netdev,
993 struct flow_block_offload *f)
994{
995 struct otx2_nic *nic = netdev_priv(netdev);
996 flow_setup_cb_t *cb;
997 bool ingress;
998
999 if (f->block_shared)
1000 return -EOPNOTSUPP;
1001
1002 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) {
1003 cb = otx2_setup_tc_block_ingress_cb;
1004 ingress = true;
1005 } else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) {
1006 cb = otx2_setup_tc_block_egress_cb;
1007 ingress = false;
1008 } else {
1009 return -EOPNOTSUPP;
1010 }
1011
1012 return flow_block_cb_setup_simple(f, &otx2_block_cb_list, cb,
1013 nic, nic, ingress);
1014}
1015
1016int otx2_setup_tc(struct net_device *netdev, enum tc_setup_type type,
1017 void *type_data)
1018{
1019 switch (type) {
1020 case TC_SETUP_BLOCK:
1021 return otx2_setup_tc_block(netdev, type_data);
1022 default:
1023 return -EOPNOTSUPP;
1024 }
1025}
1026
1027static const struct rhashtable_params tc_flow_ht_params = {
1028 .head_offset = offsetof(struct otx2_tc_flow, node),
1029 .key_offset = offsetof(struct otx2_tc_flow, cookie),
1030 .key_len = sizeof(((struct otx2_tc_flow *)0)->cookie),
1031 .automatic_shrinking = true,
1032};
1033
1034int otx2_init_tc(struct otx2_nic *nic)
1035{
1036 struct otx2_tc_info *tc = &nic->tc_info;
1037 int err;
1038
1039
1040 set_bit(0, &nic->rq_bmap);
1041
1042 if (!nic->flow_cfg) {
1043 netdev_err(nic->netdev,
1044 "Can't init TC, nic->flow_cfg is not setup\n");
1045 return -EINVAL;
1046 }
1047
1048 err = otx2_tc_alloc_ent_bitmap(nic);
1049 if (err)
1050 return err;
1051
1052 tc->flow_ht_params = tc_flow_ht_params;
1053 return rhashtable_init(&tc->flow_table, &tc->flow_ht_params);
1054}
1055
1056void otx2_shutdown_tc(struct otx2_nic *nic)
1057{
1058 struct otx2_tc_info *tc = &nic->tc_info;
1059
1060 kfree(tc->tc_entries_bitmap);
1061 rhashtable_destroy(&tc->flow_table);
1062}
1063
