1 // SPDX-License-Identifier: GPL-2.0
2 /* Marvell RVU Ethernet driver
3 *
4 * Copyright (C) 2021 Marvell.
5 *
6 */
7
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 #include "qos.h"
23
24 #define CN10K_MAX_BURST_MANTISSA 0x7FFFULL
25 #define CN10K_MAX_BURST_SIZE 8453888ULL
26
27 #define CN10K_TLX_BURST_MANTISSA GENMASK_ULL(43, 29)
28 #define CN10K_TLX_BURST_EXPONENT GENMASK_ULL(47, 44)
29
30 #define OTX2_UNSUPP_LSE_DEPTH GENMASK(6, 4)
31
32 #define MCAST_INVALID_GRP (-1U)
33
34 struct otx2_tc_flow_stats {
35 u64 bytes;
36 u64 pkts;
37 u64 used;
38 };
39
40 struct otx2_tc_flow {
41 struct list_head list;
42 unsigned long cookie;
43 struct rcu_head rcu;
44 struct otx2_tc_flow_stats stats;
45 spinlock_t lock; /* lock for stats */
46 u16 rq;
47 u16 entry;
48 u16 leaf_profile;
49 bool is_act_police;
50 u32 prio;
51 struct npc_install_flow_req req;
52 u32 mcast_grp_idx;
53 u64 rate;
54 u32 burst;
55 bool is_pps;
56 };
57
otx2_get_egress_burst_cfg(struct otx2_nic * nic,u32 burst,u32 * burst_exp,u32 * burst_mantissa)58 static void otx2_get_egress_burst_cfg(struct otx2_nic *nic, u32 burst,
59 u32 *burst_exp, u32 *burst_mantissa)
60 {
61 int max_burst, max_mantissa;
62 unsigned int tmp;
63
64 if (is_dev_otx2(nic->pdev)) {
65 max_burst = MAX_BURST_SIZE;
66 max_mantissa = MAX_BURST_MANTISSA;
67 } else {
68 max_burst = CN10K_MAX_BURST_SIZE;
69 max_mantissa = CN10K_MAX_BURST_MANTISSA;
70 }
71
72 /* Burst is calculated as
73 * ((256 + BURST_MANTISSA) << (1 + BURST_EXPONENT)) / 256
74 * Max supported burst size is 130,816 bytes.
75 */
76 burst = min_t(u32, burst, max_burst);
77 if (burst) {
78 *burst_exp = ilog2(burst) ? ilog2(burst) - 1 : 0;
79 tmp = burst - rounddown_pow_of_two(burst);
80 if (burst < max_mantissa)
81 *burst_mantissa = tmp * 2;
82 else
83 *burst_mantissa = tmp / (1ULL << (*burst_exp - 7));
84 } else {
85 *burst_exp = MAX_BURST_EXPONENT;
86 *burst_mantissa = max_mantissa;
87 }
88 }
89
otx2_get_egress_rate_cfg(u64 maxrate,u32 * exp,u32 * mantissa,u32 * div_exp)90 static void otx2_get_egress_rate_cfg(u64 maxrate, u32 *exp,
91 u32 *mantissa, u32 *div_exp)
92 {
93 u64 tmp;
94
95 /* Rate calculation by hardware
96 *
97 * PIR_ADD = ((256 + mantissa) << exp) / 256
98 * rate = (2 * PIR_ADD) / ( 1 << div_exp)
99 * The resultant rate is in Mbps.
100 */
101
102 /* 2Mbps to 100Gbps can be expressed with div_exp = 0.
103 * Setting this to '0' will ease the calculation of
104 * exponent and mantissa.
105 */
106 *div_exp = 0;
107
108 if (maxrate) {
109 *exp = ilog2(maxrate) ? ilog2(maxrate) - 1 : 0;
110 tmp = maxrate - rounddown_pow_of_two(maxrate);
111 if (maxrate < MAX_RATE_MANTISSA)
112 *mantissa = tmp * 2;
113 else
114 *mantissa = tmp / (1ULL << (*exp - 7));
115 } else {
116 /* Instead of disabling rate limiting, set all values to max */
117 *exp = MAX_RATE_EXPONENT;
118 *mantissa = MAX_RATE_MANTISSA;
119 }
120 }
121
otx2_get_txschq_rate_regval(struct otx2_nic * nic,u64 maxrate,u32 burst)122 u64 otx2_get_txschq_rate_regval(struct otx2_nic *nic,
123 u64 maxrate, u32 burst)
124 {
125 u32 burst_exp, burst_mantissa;
126 u32 exp, mantissa, div_exp;
127 u64 regval = 0;
128
129 /* Get exponent and mantissa values from the desired rate */
130 otx2_get_egress_burst_cfg(nic, burst, &burst_exp, &burst_mantissa);
131 otx2_get_egress_rate_cfg(maxrate, &exp, &mantissa, &div_exp);
132
133 if (is_dev_otx2(nic->pdev)) {
134 regval = FIELD_PREP(TLX_BURST_EXPONENT, (u64)burst_exp) |
135 FIELD_PREP(TLX_BURST_MANTISSA, (u64)burst_mantissa) |
136 FIELD_PREP(TLX_RATE_DIVIDER_EXPONENT, div_exp) |
137 FIELD_PREP(TLX_RATE_EXPONENT, exp) |
138 FIELD_PREP(TLX_RATE_MANTISSA, mantissa) | BIT_ULL(0);
139 } else {
140 regval = FIELD_PREP(CN10K_TLX_BURST_EXPONENT, (u64)burst_exp) |
141 FIELD_PREP(CN10K_TLX_BURST_MANTISSA, (u64)burst_mantissa) |
142 FIELD_PREP(TLX_RATE_DIVIDER_EXPONENT, div_exp) |
143 FIELD_PREP(TLX_RATE_EXPONENT, exp) |
144 FIELD_PREP(TLX_RATE_MANTISSA, mantissa) | BIT_ULL(0);
145 }
146
147 return regval;
148 }
149
otx2_set_matchall_egress_rate(struct otx2_nic * nic,u32 burst,u64 maxrate)150 static int otx2_set_matchall_egress_rate(struct otx2_nic *nic,
151 u32 burst, u64 maxrate)
152 {
153 struct otx2_hw *hw = &nic->hw;
154 struct nix_txschq_config *req;
155 int txschq, err;
156
157 /* All SQs share the same TL4, so pick the first scheduler */
158 txschq = hw->txschq_list[NIX_TXSCH_LVL_TL4][0];
159
160 mutex_lock(&nic->mbox.lock);
161 req = otx2_mbox_alloc_msg_nix_txschq_cfg(&nic->mbox);
162 if (!req) {
163 mutex_unlock(&nic->mbox.lock);
164 return -ENOMEM;
165 }
166
167 req->lvl = NIX_TXSCH_LVL_TL4;
168 req->num_regs = 1;
169 req->reg[0] = NIX_AF_TL4X_PIR(txschq);
170 req->regval[0] = otx2_get_txschq_rate_regval(nic, maxrate, burst);
171
172 err = otx2_sync_mbox_msg(&nic->mbox);
173 mutex_unlock(&nic->mbox.lock);
174 return err;
175 }
176
otx2_tc_validate_flow(struct otx2_nic * nic,struct flow_action * actions,struct netlink_ext_ack * extack)177 static int otx2_tc_validate_flow(struct otx2_nic *nic,
178 struct flow_action *actions,
179 struct netlink_ext_ack *extack)
180 {
181 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
182 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
183 return -EINVAL;
184 }
185
186 if (!flow_action_has_entries(actions)) {
187 NL_SET_ERR_MSG_MOD(extack, "MATCHALL offload called with no action");
188 return -EINVAL;
189 }
190
191 if (!flow_offload_has_one_action(actions)) {
192 NL_SET_ERR_MSG_MOD(extack,
193 "Egress MATCHALL offload supports only 1 policing action");
194 return -EINVAL;
195 }
196 return 0;
197 }
198
otx2_policer_validate(const struct flow_action * action,const struct flow_action_entry * act,struct netlink_ext_ack * extack)199 static int otx2_policer_validate(const struct flow_action *action,
200 const struct flow_action_entry *act,
201 struct netlink_ext_ack *extack)
202 {
203 if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
204 NL_SET_ERR_MSG_MOD(extack,
205 "Offload not supported when exceed action is not drop");
206 return -EOPNOTSUPP;
207 }
208
209 if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
210 act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
211 NL_SET_ERR_MSG_MOD(extack,
212 "Offload not supported when conform action is not pipe or ok");
213 return -EOPNOTSUPP;
214 }
215
216 if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
217 !flow_action_is_last_entry(action, act)) {
218 NL_SET_ERR_MSG_MOD(extack,
219 "Offload not supported when conform action is ok, but action is not last");
220 return -EOPNOTSUPP;
221 }
222
223 if (act->police.peakrate_bytes_ps ||
224 act->police.avrate || act->police.overhead) {
225 NL_SET_ERR_MSG_MOD(extack,
226 "Offload not supported when peakrate/avrate/overhead is configured");
227 return -EOPNOTSUPP;
228 }
229
230 return 0;
231 }
232
otx2_tc_egress_matchall_install(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls)233 static int otx2_tc_egress_matchall_install(struct otx2_nic *nic,
234 struct tc_cls_matchall_offload *cls)
235 {
236 struct netlink_ext_ack *extack = cls->common.extack;
237 struct flow_action *actions = &cls->rule->action;
238 struct flow_action_entry *entry;
239 int err;
240
241 err = otx2_tc_validate_flow(nic, actions, extack);
242 if (err)
243 return err;
244
245 if (nic->flags & OTX2_FLAG_TC_MATCHALL_EGRESS_ENABLED) {
246 NL_SET_ERR_MSG_MOD(extack,
247 "Only one Egress MATCHALL ratelimiter can be offloaded");
248 return -ENOMEM;
249 }
250
251 entry = &cls->rule->action.entries[0];
252 switch (entry->id) {
253 case FLOW_ACTION_POLICE:
254 err = otx2_policer_validate(&cls->rule->action, entry, extack);
255 if (err)
256 return err;
257
258 if (entry->police.rate_pkt_ps) {
259 NL_SET_ERR_MSG_MOD(extack, "QoS offload not support packets per second");
260 return -EOPNOTSUPP;
261 }
262 err = otx2_set_matchall_egress_rate(nic, entry->police.burst,
263 otx2_convert_rate(entry->police.rate_bytes_ps));
264 if (err)
265 return err;
266 nic->flags |= OTX2_FLAG_TC_MATCHALL_EGRESS_ENABLED;
267 break;
268 default:
269 NL_SET_ERR_MSG_MOD(extack,
270 "Only police action is supported with Egress MATCHALL offload");
271 return -EOPNOTSUPP;
272 }
273
274 return 0;
275 }
276
otx2_tc_egress_matchall_delete(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls)277 static int otx2_tc_egress_matchall_delete(struct otx2_nic *nic,
278 struct tc_cls_matchall_offload *cls)
279 {
280 struct netlink_ext_ack *extack = cls->common.extack;
281 int err;
282
283 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
284 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
285 return -EINVAL;
286 }
287
288 err = otx2_set_matchall_egress_rate(nic, 0, 0);
289 nic->flags &= ~OTX2_FLAG_TC_MATCHALL_EGRESS_ENABLED;
290 return err;
291 }
292
otx2_tc_act_set_hw_police(struct otx2_nic * nic,struct otx2_tc_flow * node)293 static int otx2_tc_act_set_hw_police(struct otx2_nic *nic,
294 struct otx2_tc_flow *node)
295 {
296 int rc;
297
298 mutex_lock(&nic->mbox.lock);
299
300 rc = cn10k_alloc_leaf_profile(nic, &node->leaf_profile);
301 if (rc) {
302 mutex_unlock(&nic->mbox.lock);
303 return rc;
304 }
305
306 rc = cn10k_set_ipolicer_rate(nic, node->leaf_profile,
307 node->burst, node->rate, node->is_pps);
308 if (rc)
309 goto free_leaf;
310
311 rc = cn10k_map_unmap_rq_policer(nic, node->rq, node->leaf_profile, true);
312 if (rc)
313 goto free_leaf;
314
315 mutex_unlock(&nic->mbox.lock);
316
317 return 0;
318
319 free_leaf:
320 if (cn10k_free_leaf_profile(nic, node->leaf_profile))
321 netdev_err(nic->netdev,
322 "Unable to free leaf bandwidth profile(%d)\n",
323 node->leaf_profile);
324 mutex_unlock(&nic->mbox.lock);
325 return rc;
326 }
327
otx2_tc_act_set_police(struct otx2_nic * nic,struct otx2_tc_flow * node,struct flow_cls_offload * f,u64 rate,u32 burst,u32 mark,struct npc_install_flow_req * req,bool pps)328 static int otx2_tc_act_set_police(struct otx2_nic *nic,
329 struct otx2_tc_flow *node,
330 struct flow_cls_offload *f,
331 u64 rate, u32 burst, u32 mark,
332 struct npc_install_flow_req *req, bool pps)
333 {
334 struct netlink_ext_ack *extack = f->common.extack;
335 struct otx2_hw *hw = &nic->hw;
336 int rq_idx, rc;
337
338 rq_idx = find_first_zero_bit(&nic->rq_bmap, hw->rx_queues);
339 if (rq_idx >= hw->rx_queues) {
340 NL_SET_ERR_MSG_MOD(extack, "Police action rules exceeded");
341 return -EINVAL;
342 }
343
344 req->match_id = mark & 0xFFFFULL;
345 req->index = rq_idx;
346 req->op = NIX_RX_ACTIONOP_UCAST;
347
348 node->is_act_police = true;
349 node->rq = rq_idx;
350 node->burst = burst;
351 node->rate = rate;
352 node->is_pps = pps;
353
354 rc = otx2_tc_act_set_hw_police(nic, node);
355 if (!rc)
356 set_bit(rq_idx, &nic->rq_bmap);
357
358 return rc;
359 }
360
otx2_tc_update_mcast(struct otx2_nic * nic,struct npc_install_flow_req * req,struct netlink_ext_ack * extack,struct otx2_tc_flow * node,struct nix_mcast_grp_update_req * ureq,u8 num_intf)361 static int otx2_tc_update_mcast(struct otx2_nic *nic,
362 struct npc_install_flow_req *req,
363 struct netlink_ext_ack *extack,
364 struct otx2_tc_flow *node,
365 struct nix_mcast_grp_update_req *ureq,
366 u8 num_intf)
367 {
368 struct nix_mcast_grp_update_req *grp_update_req;
369 struct nix_mcast_grp_create_req *creq;
370 struct nix_mcast_grp_create_rsp *crsp;
371 u32 grp_index;
372 int rc;
373
374 mutex_lock(&nic->mbox.lock);
375 creq = otx2_mbox_alloc_msg_nix_mcast_grp_create(&nic->mbox);
376 if (!creq) {
377 rc = -ENOMEM;
378 goto error;
379 }
380
381 creq->dir = NIX_MCAST_INGRESS;
382 /* Send message to AF */
383 rc = otx2_sync_mbox_msg(&nic->mbox);
384 if (rc) {
385 NL_SET_ERR_MSG_MOD(extack, "Failed to create multicast group");
386 goto error;
387 }
388
389 crsp = (struct nix_mcast_grp_create_rsp *)otx2_mbox_get_rsp(&nic->mbox.mbox,
390 0,
391 &creq->hdr);
392 if (IS_ERR(crsp)) {
393 rc = PTR_ERR(crsp);
394 goto error;
395 }
396
397 grp_index = crsp->mcast_grp_idx;
398 grp_update_req = otx2_mbox_alloc_msg_nix_mcast_grp_update(&nic->mbox);
399 if (!grp_update_req) {
400 NL_SET_ERR_MSG_MOD(extack, "Failed to update multicast group");
401 rc = -ENOMEM;
402 goto error;
403 }
404
405 ureq->op = NIX_MCAST_OP_ADD_ENTRY;
406 ureq->mcast_grp_idx = grp_index;
407 ureq->num_mce_entry = num_intf;
408 ureq->pcifunc[0] = nic->pcifunc;
409 ureq->channel[0] = nic->hw.tx_chan_base;
410
411 ureq->dest_type[0] = NIX_RX_RSS;
412 ureq->rq_rss_index[0] = 0;
413 memcpy(&ureq->hdr, &grp_update_req->hdr, sizeof(struct mbox_msghdr));
414 memcpy(grp_update_req, ureq, sizeof(struct nix_mcast_grp_update_req));
415
416 /* Send message to AF */
417 rc = otx2_sync_mbox_msg(&nic->mbox);
418 if (rc) {
419 NL_SET_ERR_MSG_MOD(extack, "Failed to update multicast group");
420 goto error;
421 }
422
423 mutex_unlock(&nic->mbox.lock);
424 req->op = NIX_RX_ACTIONOP_MCAST;
425 req->index = grp_index;
426 node->mcast_grp_idx = grp_index;
427 return 0;
428
429 error:
430 mutex_unlock(&nic->mbox.lock);
431 return rc;
432 }
433
otx2_tc_parse_actions(struct otx2_nic * nic,struct flow_action * flow_action,struct npc_install_flow_req * req,struct flow_cls_offload * f,struct otx2_tc_flow * node)434 static int otx2_tc_parse_actions(struct otx2_nic *nic,
435 struct flow_action *flow_action,
436 struct npc_install_flow_req *req,
437 struct flow_cls_offload *f,
438 struct otx2_tc_flow *node)
439 {
440 struct nix_mcast_grp_update_req dummy_grp_update_req = { 0 };
441 struct netlink_ext_ack *extack = f->common.extack;
442 bool pps = false, mcast = false;
443 struct flow_action_entry *act;
444 struct net_device *target;
445 struct otx2_nic *priv;
446 struct rep_dev *rdev;
447 u32 burst, mark = 0;
448 u8 nr_police = 0;
449 u8 num_intf = 1;
450 int err, i;
451 u64 rate;
452
453 if (!flow_action_has_entries(flow_action)) {
454 NL_SET_ERR_MSG_MOD(extack, "no tc actions specified");
455 return -EINVAL;
456 }
457
458 flow_action_for_each(i, act, flow_action) {
459 switch (act->id) {
460 case FLOW_ACTION_DROP:
461 req->op = NIX_RX_ACTIONOP_DROP;
462 return 0;
463 case FLOW_ACTION_ACCEPT:
464 req->op = NIX_RX_ACTION_DEFAULT;
465 return 0;
466 case FLOW_ACTION_REDIRECT_INGRESS:
467 target = act->dev;
468 if (target->dev.parent) {
469 priv = netdev_priv(target);
470 if (rvu_get_pf(nic->pcifunc) != rvu_get_pf(priv->pcifunc)) {
471 NL_SET_ERR_MSG_MOD(extack,
472 "can't redirect to other pf/vf");
473 return -EOPNOTSUPP;
474 }
475 req->vf = priv->pcifunc & RVU_PFVF_FUNC_MASK;
476 } else {
477 rdev = netdev_priv(target);
478 req->vf = rdev->pcifunc & RVU_PFVF_FUNC_MASK;
479 }
480
481 /* if op is already set; avoid overwriting the same */
482 if (!req->op)
483 req->op = NIX_RX_ACTION_DEFAULT;
484 break;
485
486 case FLOW_ACTION_VLAN_POP:
487 req->vtag0_valid = true;
488 /* use RX_VTAG_TYPE7 which is initialized to strip vlan tag */
489 req->vtag0_type = NIX_AF_LFX_RX_VTAG_TYPE7;
490 break;
491 case FLOW_ACTION_POLICE:
492 /* Ingress ratelimiting is not supported on OcteonTx2 */
493 if (is_dev_otx2(nic->pdev)) {
494 NL_SET_ERR_MSG_MOD(extack,
495 "Ingress policing not supported on this platform");
496 return -EOPNOTSUPP;
497 }
498
499 err = otx2_policer_validate(flow_action, act, extack);
500 if (err)
501 return err;
502
503 if (act->police.rate_bytes_ps > 0) {
504 rate = act->police.rate_bytes_ps * 8;
505 burst = act->police.burst;
506 } else if (act->police.rate_pkt_ps > 0) {
507 /* The algorithm used to calculate rate
508 * mantissa, exponent values for a given token
509 * rate (token can be byte or packet) requires
510 * token rate to be mutiplied by 8.
511 */
512 rate = act->police.rate_pkt_ps * 8;
513 burst = act->police.burst_pkt;
514 pps = true;
515 }
516 nr_police++;
517 break;
518 case FLOW_ACTION_MARK:
519 if (act->mark & ~OTX2_RX_MATCH_ID_MASK) {
520 NL_SET_ERR_MSG_MOD(extack, "Bad flow mark, only 16 bit supported");
521 return -EOPNOTSUPP;
522 }
523 mark = act->mark;
524 req->match_id = mark & OTX2_RX_MATCH_ID_MASK;
525 req->op = NIX_RX_ACTION_DEFAULT;
526 nic->flags |= OTX2_FLAG_TC_MARK_ENABLED;
527 refcount_inc(&nic->flow_cfg->mark_flows);
528 break;
529
530 case FLOW_ACTION_RX_QUEUE_MAPPING:
531 req->op = NIX_RX_ACTIONOP_UCAST;
532 req->index = act->rx_queue;
533 break;
534
535 case FLOW_ACTION_MIRRED_INGRESS:
536 target = act->dev;
537 priv = netdev_priv(target);
538 dummy_grp_update_req.pcifunc[num_intf] = priv->pcifunc;
539 dummy_grp_update_req.channel[num_intf] = priv->hw.tx_chan_base;
540 dummy_grp_update_req.dest_type[num_intf] = NIX_RX_RSS;
541 dummy_grp_update_req.rq_rss_index[num_intf] = 0;
542 mcast = true;
543 num_intf++;
544 break;
545
546 default:
547 return -EOPNOTSUPP;
548 }
549 }
550
551 if (mcast) {
552 err = otx2_tc_update_mcast(nic, req, extack, node,
553 &dummy_grp_update_req,
554 num_intf);
555 if (err)
556 return err;
557 }
558
559 if (nr_police > 1) {
560 NL_SET_ERR_MSG_MOD(extack,
561 "rate limit police offload requires a single action");
562 return -EOPNOTSUPP;
563 }
564
565 if (nr_police)
566 return otx2_tc_act_set_police(nic, node, f, rate, burst,
567 mark, req, pps);
568
569 return 0;
570 }
571
otx2_tc_process_vlan(struct otx2_nic * nic,struct flow_msg * flow_spec,struct flow_msg * flow_mask,struct flow_rule * rule,struct npc_install_flow_req * req,bool is_inner)572 static int otx2_tc_process_vlan(struct otx2_nic *nic, struct flow_msg *flow_spec,
573 struct flow_msg *flow_mask, struct flow_rule *rule,
574 struct npc_install_flow_req *req, bool is_inner)
575 {
576 struct flow_match_vlan match;
577 u16 vlan_tci, vlan_tci_mask;
578
579 if (is_inner)
580 flow_rule_match_cvlan(rule, &match);
581 else
582 flow_rule_match_vlan(rule, &match);
583
584 if (!eth_type_vlan(match.key->vlan_tpid)) {
585 netdev_err(nic->netdev, "vlan tpid 0x%x not supported\n",
586 ntohs(match.key->vlan_tpid));
587 return -EOPNOTSUPP;
588 }
589
590 if (!match.mask->vlan_id) {
591 struct flow_action_entry *act;
592 int i;
593
594 flow_action_for_each(i, act, &rule->action) {
595 if (act->id == FLOW_ACTION_DROP) {
596 netdev_err(nic->netdev,
597 "vlan tpid 0x%x with vlan_id %d is not supported for DROP rule.\n",
598 ntohs(match.key->vlan_tpid), match.key->vlan_id);
599 return -EOPNOTSUPP;
600 }
601 }
602 }
603
604 if (match.mask->vlan_id ||
605 match.mask->vlan_dei ||
606 match.mask->vlan_priority) {
607 vlan_tci = match.key->vlan_id |
608 match.key->vlan_dei << 12 |
609 match.key->vlan_priority << 13;
610
611 vlan_tci_mask = match.mask->vlan_id |
612 match.mask->vlan_dei << 12 |
613 match.mask->vlan_priority << 13;
614 if (is_inner) {
615 flow_spec->vlan_itci = htons(vlan_tci);
616 flow_mask->vlan_itci = htons(vlan_tci_mask);
617 req->features |= BIT_ULL(NPC_INNER_VID);
618 } else {
619 flow_spec->vlan_tci = htons(vlan_tci);
620 flow_mask->vlan_tci = htons(vlan_tci_mask);
621 req->features |= BIT_ULL(NPC_OUTER_VID);
622 }
623 }
624
625 return 0;
626 }
627
otx2_tc_prepare_flow(struct otx2_nic * nic,struct otx2_tc_flow * node,struct flow_cls_offload * f,struct npc_install_flow_req * req)628 static int otx2_tc_prepare_flow(struct otx2_nic *nic, struct otx2_tc_flow *node,
629 struct flow_cls_offload *f,
630 struct npc_install_flow_req *req)
631 {
632 struct netlink_ext_ack *extack = f->common.extack;
633 struct flow_msg *flow_spec = &req->packet;
634 struct flow_msg *flow_mask = &req->mask;
635 struct flow_dissector *dissector;
636 struct flow_rule *rule;
637 u8 ip_proto = 0;
638
639 rule = flow_cls_offload_flow_rule(f);
640 dissector = rule->match.dissector;
641
642 if ((dissector->used_keys &
643 ~(BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
644 BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
645 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
646 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN) |
647 BIT(FLOW_DISSECTOR_KEY_CVLAN) |
648 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
649 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
650 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) |
651 BIT(FLOW_DISSECTOR_KEY_IPSEC) |
652 BIT_ULL(FLOW_DISSECTOR_KEY_MPLS) |
653 BIT_ULL(FLOW_DISSECTOR_KEY_ICMP) |
654 BIT_ULL(FLOW_DISSECTOR_KEY_TCP) |
655 BIT_ULL(FLOW_DISSECTOR_KEY_IP)))) {
656 netdev_info(nic->netdev, "unsupported flow used key 0x%llx",
657 dissector->used_keys);
658 return -EOPNOTSUPP;
659 }
660
661 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
662 struct flow_match_basic match;
663
664 flow_rule_match_basic(rule, &match);
665
666 /* All EtherTypes can be matched, no hw limitation */
667 flow_spec->etype = match.key->n_proto;
668 flow_mask->etype = match.mask->n_proto;
669 req->features |= BIT_ULL(NPC_ETYPE);
670
671 if (match.mask->ip_proto &&
672 (match.key->ip_proto != IPPROTO_TCP &&
673 match.key->ip_proto != IPPROTO_UDP &&
674 match.key->ip_proto != IPPROTO_SCTP &&
675 match.key->ip_proto != IPPROTO_ICMP &&
676 match.key->ip_proto != IPPROTO_ESP &&
677 match.key->ip_proto != IPPROTO_AH &&
678 match.key->ip_proto != IPPROTO_ICMPV6)) {
679 netdev_info(nic->netdev,
680 "ip_proto=0x%x not supported\n",
681 match.key->ip_proto);
682 return -EOPNOTSUPP;
683 }
684 if (match.mask->ip_proto)
685 ip_proto = match.key->ip_proto;
686
687 if (ip_proto == IPPROTO_UDP)
688 req->features |= BIT_ULL(NPC_IPPROTO_UDP);
689 else if (ip_proto == IPPROTO_TCP)
690 req->features |= BIT_ULL(NPC_IPPROTO_TCP);
691 else if (ip_proto == IPPROTO_SCTP)
692 req->features |= BIT_ULL(NPC_IPPROTO_SCTP);
693 else if (ip_proto == IPPROTO_ICMP)
694 req->features |= BIT_ULL(NPC_IPPROTO_ICMP);
695 else if (ip_proto == IPPROTO_ICMPV6)
696 req->features |= BIT_ULL(NPC_IPPROTO_ICMP6);
697 else if (ip_proto == IPPROTO_ESP)
698 req->features |= BIT_ULL(NPC_IPPROTO_ESP);
699 else if (ip_proto == IPPROTO_AH)
700 req->features |= BIT_ULL(NPC_IPPROTO_AH);
701 }
702
703 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
704 struct flow_match_control match;
705 u32 val;
706
707 flow_rule_match_control(rule, &match);
708
709 if (match.mask->flags & FLOW_DIS_IS_FRAGMENT) {
710 val = match.key->flags & FLOW_DIS_IS_FRAGMENT;
711 if (ntohs(flow_spec->etype) == ETH_P_IP) {
712 flow_spec->ip_flag = val ? IPV4_FLAG_MORE : 0;
713 flow_mask->ip_flag = IPV4_FLAG_MORE;
714 req->features |= BIT_ULL(NPC_IPFRAG_IPV4);
715 } else if (ntohs(flow_spec->etype) == ETH_P_IPV6) {
716 flow_spec->next_header = val ?
717 IPPROTO_FRAGMENT : 0;
718 flow_mask->next_header = 0xff;
719 req->features |= BIT_ULL(NPC_IPFRAG_IPV6);
720 } else {
721 NL_SET_ERR_MSG_MOD(extack, "flow-type should be either IPv4 and IPv6");
722 return -EOPNOTSUPP;
723 }
724 }
725
726 if (!flow_rule_is_supp_control_flags(FLOW_DIS_IS_FRAGMENT,
727 match.mask->flags, extack))
728 return -EOPNOTSUPP;
729 }
730
731 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
732 struct flow_match_eth_addrs match;
733
734 flow_rule_match_eth_addrs(rule, &match);
735 if (!is_zero_ether_addr(match.mask->src)) {
736 NL_SET_ERR_MSG_MOD(extack, "src mac match not supported");
737 return -EOPNOTSUPP;
738 }
739
740 if (!is_zero_ether_addr(match.mask->dst)) {
741 ether_addr_copy(flow_spec->dmac, (u8 *)&match.key->dst);
742 ether_addr_copy(flow_mask->dmac,
743 (u8 *)&match.mask->dst);
744 req->features |= BIT_ULL(NPC_DMAC);
745 }
746 }
747
748 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPSEC)) {
749 struct flow_match_ipsec match;
750
751 flow_rule_match_ipsec(rule, &match);
752 if (!match.mask->spi) {
753 NL_SET_ERR_MSG_MOD(extack, "spi index not specified");
754 return -EOPNOTSUPP;
755 }
756 if (ip_proto != IPPROTO_ESP &&
757 ip_proto != IPPROTO_AH) {
758 NL_SET_ERR_MSG_MOD(extack,
759 "SPI index is valid only for ESP/AH proto");
760 return -EOPNOTSUPP;
761 }
762
763 flow_spec->spi = match.key->spi;
764 flow_mask->spi = match.mask->spi;
765 req->features |= BIT_ULL(NPC_IPSEC_SPI);
766 }
767
768 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) {
769 struct flow_match_ip match;
770
771 flow_rule_match_ip(rule, &match);
772 if ((ntohs(flow_spec->etype) != ETH_P_IP) &&
773 match.mask->tos) {
774 NL_SET_ERR_MSG_MOD(extack, "tos not supported");
775 return -EOPNOTSUPP;
776 }
777 if (match.mask->ttl) {
778 NL_SET_ERR_MSG_MOD(extack, "ttl not supported");
779 return -EOPNOTSUPP;
780 }
781 flow_spec->tos = match.key->tos;
782 flow_mask->tos = match.mask->tos;
783 req->features |= BIT_ULL(NPC_TOS);
784 }
785
786 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
787 int ret;
788
789 ret = otx2_tc_process_vlan(nic, flow_spec, flow_mask, rule, req, false);
790 if (ret)
791 return ret;
792 }
793
794 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN)) {
795 int ret;
796
797 ret = otx2_tc_process_vlan(nic, flow_spec, flow_mask, rule, req, true);
798 if (ret)
799 return ret;
800 }
801
802 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
803 struct flow_match_ipv4_addrs match;
804
805 flow_rule_match_ipv4_addrs(rule, &match);
806
807 flow_spec->ip4dst = match.key->dst;
808 flow_mask->ip4dst = match.mask->dst;
809 req->features |= BIT_ULL(NPC_DIP_IPV4);
810
811 flow_spec->ip4src = match.key->src;
812 flow_mask->ip4src = match.mask->src;
813 req->features |= BIT_ULL(NPC_SIP_IPV4);
814 } else if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
815 struct flow_match_ipv6_addrs match;
816
817 flow_rule_match_ipv6_addrs(rule, &match);
818
819 if (ipv6_addr_loopback(&match.key->dst) ||
820 ipv6_addr_loopback(&match.key->src)) {
821 NL_SET_ERR_MSG_MOD(extack,
822 "Flow matching IPv6 loopback addr not supported");
823 return -EOPNOTSUPP;
824 }
825
826 if (!ipv6_addr_any(&match.mask->dst)) {
827 memcpy(&flow_spec->ip6dst,
828 (struct in6_addr *)&match.key->dst,
829 sizeof(flow_spec->ip6dst));
830 memcpy(&flow_mask->ip6dst,
831 (struct in6_addr *)&match.mask->dst,
832 sizeof(flow_spec->ip6dst));
833 req->features |= BIT_ULL(NPC_DIP_IPV6);
834 }
835
836 if (!ipv6_addr_any(&match.mask->src)) {
837 memcpy(&flow_spec->ip6src,
838 (struct in6_addr *)&match.key->src,
839 sizeof(flow_spec->ip6src));
840 memcpy(&flow_mask->ip6src,
841 (struct in6_addr *)&match.mask->src,
842 sizeof(flow_spec->ip6src));
843 req->features |= BIT_ULL(NPC_SIP_IPV6);
844 }
845 }
846
847 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
848 struct flow_match_ports match;
849
850 flow_rule_match_ports(rule, &match);
851
852 flow_spec->dport = match.key->dst;
853 flow_mask->dport = match.mask->dst;
854
855 if (flow_mask->dport) {
856 if (ip_proto == IPPROTO_UDP)
857 req->features |= BIT_ULL(NPC_DPORT_UDP);
858 else if (ip_proto == IPPROTO_TCP)
859 req->features |= BIT_ULL(NPC_DPORT_TCP);
860 else if (ip_proto == IPPROTO_SCTP)
861 req->features |= BIT_ULL(NPC_DPORT_SCTP);
862 }
863
864 flow_spec->sport = match.key->src;
865 flow_mask->sport = match.mask->src;
866
867 if (flow_mask->sport) {
868 if (ip_proto == IPPROTO_UDP)
869 req->features |= BIT_ULL(NPC_SPORT_UDP);
870 else if (ip_proto == IPPROTO_TCP)
871 req->features |= BIT_ULL(NPC_SPORT_TCP);
872 else if (ip_proto == IPPROTO_SCTP)
873 req->features |= BIT_ULL(NPC_SPORT_SCTP);
874 }
875 }
876
877 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_TCP)) {
878 struct flow_match_tcp match;
879
880 flow_rule_match_tcp(rule, &match);
881
882 flow_spec->tcp_flags = match.key->flags;
883 flow_mask->tcp_flags = match.mask->flags;
884 req->features |= BIT_ULL(NPC_TCP_FLAGS);
885 }
886
887 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_MPLS)) {
888 struct flow_match_mpls match;
889 u8 bit;
890
891 flow_rule_match_mpls(rule, &match);
892
893 if (match.mask->used_lses & OTX2_UNSUPP_LSE_DEPTH) {
894 NL_SET_ERR_MSG_MOD(extack,
895 "unsupported LSE depth for MPLS match offload");
896 return -EOPNOTSUPP;
897 }
898
899 for_each_set_bit(bit, (unsigned long *)&match.mask->used_lses,
900 FLOW_DIS_MPLS_MAX) {
901 /* check if any of the fields LABEL,TC,BOS are set */
902 if (*((u32 *)&match.mask->ls[bit]) &
903 OTX2_FLOWER_MASK_MPLS_NON_TTL) {
904 /* Hardware will capture 4 byte MPLS header into
905 * two fields NPC_MPLSX_LBTCBOS and NPC_MPLSX_TTL.
906 * Derive the associated NPC key based on header
907 * index and offset.
908 */
909
910 req->features |= BIT_ULL(NPC_MPLS1_LBTCBOS +
911 2 * bit);
912 flow_spec->mpls_lse[bit] =
913 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_LB,
914 match.key->ls[bit].mpls_label) |
915 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_TC,
916 match.key->ls[bit].mpls_tc) |
917 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_BOS,
918 match.key->ls[bit].mpls_bos);
919
920 flow_mask->mpls_lse[bit] =
921 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_LB,
922 match.mask->ls[bit].mpls_label) |
923 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_TC,
924 match.mask->ls[bit].mpls_tc) |
925 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_BOS,
926 match.mask->ls[bit].mpls_bos);
927 }
928
929 if (match.mask->ls[bit].mpls_ttl) {
930 req->features |= BIT_ULL(NPC_MPLS1_TTL +
931 2 * bit);
932 flow_spec->mpls_lse[bit] |=
933 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_TTL,
934 match.key->ls[bit].mpls_ttl);
935 flow_mask->mpls_lse[bit] |=
936 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_TTL,
937 match.mask->ls[bit].mpls_ttl);
938 }
939 }
940 }
941
942 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP)) {
943 struct flow_match_icmp match;
944
945 flow_rule_match_icmp(rule, &match);
946
947 flow_spec->icmp_type = match.key->type;
948 flow_mask->icmp_type = match.mask->type;
949 req->features |= BIT_ULL(NPC_TYPE_ICMP);
950
951 flow_spec->icmp_code = match.key->code;
952 flow_mask->icmp_code = match.mask->code;
953 req->features |= BIT_ULL(NPC_CODE_ICMP);
954 }
955 return otx2_tc_parse_actions(nic, &rule->action, req, f, node);
956 }
957
otx2_destroy_tc_flow_list(struct otx2_nic * pfvf)958 static void otx2_destroy_tc_flow_list(struct otx2_nic *pfvf)
959 {
960 struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
961 struct otx2_tc_flow *iter, *tmp;
962
963 if (!(pfvf->flags & OTX2_FLAG_MCAM_ENTRIES_ALLOC))
964 return;
965
966 list_for_each_entry_safe(iter, tmp, &flow_cfg->flow_list_tc, list) {
967 list_del(&iter->list);
968 kfree(iter);
969 flow_cfg->nr_flows--;
970 }
971 }
972
otx2_tc_get_entry_by_cookie(struct otx2_flow_config * flow_cfg,unsigned long cookie)973 static struct otx2_tc_flow *otx2_tc_get_entry_by_cookie(struct otx2_flow_config *flow_cfg,
974 unsigned long cookie)
975 {
976 struct otx2_tc_flow *tmp;
977
978 list_for_each_entry(tmp, &flow_cfg->flow_list_tc, list) {
979 if (tmp->cookie == cookie)
980 return tmp;
981 }
982
983 return NULL;
984 }
985
otx2_tc_get_entry_by_index(struct otx2_flow_config * flow_cfg,int index)986 static struct otx2_tc_flow *otx2_tc_get_entry_by_index(struct otx2_flow_config *flow_cfg,
987 int index)
988 {
989 struct otx2_tc_flow *tmp;
990 int i = 0;
991
992 list_for_each_entry(tmp, &flow_cfg->flow_list_tc, list) {
993 if (i == index)
994 return tmp;
995 i++;
996 }
997
998 return NULL;
999 }
1000
otx2_tc_del_from_flow_list(struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node)1001 static void otx2_tc_del_from_flow_list(struct otx2_flow_config *flow_cfg,
1002 struct otx2_tc_flow *node)
1003 {
1004 struct list_head *pos, *n;
1005 struct otx2_tc_flow *tmp;
1006
1007 list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
1008 tmp = list_entry(pos, struct otx2_tc_flow, list);
1009 if (node == tmp) {
1010 list_del(&node->list);
1011 return;
1012 }
1013 }
1014 }
1015
otx2_tc_add_to_flow_list(struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node)1016 static int otx2_tc_add_to_flow_list(struct otx2_flow_config *flow_cfg,
1017 struct otx2_tc_flow *node)
1018 {
1019 struct list_head *pos, *n;
1020 struct otx2_tc_flow *tmp;
1021 int index = 0;
1022
1023 /* If the flow list is empty then add the new node */
1024 if (list_empty(&flow_cfg->flow_list_tc)) {
1025 list_add(&node->list, &flow_cfg->flow_list_tc);
1026 return index;
1027 }
1028
1029 list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
1030 tmp = list_entry(pos, struct otx2_tc_flow, list);
1031 if (node->prio < tmp->prio)
1032 break;
1033 index++;
1034 }
1035
1036 list_add(&node->list, pos->prev);
1037 return index;
1038 }
1039
otx2_add_mcam_flow_entry(struct otx2_nic * nic,struct npc_install_flow_req * req)1040 static int otx2_add_mcam_flow_entry(struct otx2_nic *nic, struct npc_install_flow_req *req)
1041 {
1042 struct npc_install_flow_req *tmp_req;
1043 int err;
1044
1045 mutex_lock(&nic->mbox.lock);
1046 tmp_req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
1047 if (!tmp_req) {
1048 mutex_unlock(&nic->mbox.lock);
1049 return -ENOMEM;
1050 }
1051
1052 memcpy(tmp_req, req, sizeof(struct npc_install_flow_req));
1053 /* Send message to AF */
1054 err = otx2_sync_mbox_msg(&nic->mbox);
1055 if (err) {
1056 netdev_err(nic->netdev, "Failed to install MCAM flow entry %d\n",
1057 req->entry);
1058 mutex_unlock(&nic->mbox.lock);
1059 return -EFAULT;
1060 }
1061
1062 mutex_unlock(&nic->mbox.lock);
1063 return 0;
1064 }
1065
otx2_del_mcam_flow_entry(struct otx2_nic * nic,u16 entry,u16 * cntr_val)1066 static int otx2_del_mcam_flow_entry(struct otx2_nic *nic, u16 entry, u16 *cntr_val)
1067 {
1068 struct npc_delete_flow_rsp *rsp;
1069 struct npc_delete_flow_req *req;
1070 int err;
1071
1072 mutex_lock(&nic->mbox.lock);
1073 req = otx2_mbox_alloc_msg_npc_delete_flow(&nic->mbox);
1074 if (!req) {
1075 mutex_unlock(&nic->mbox.lock);
1076 return -ENOMEM;
1077 }
1078
1079 req->entry = entry;
1080
1081 /* Send message to AF */
1082 err = otx2_sync_mbox_msg(&nic->mbox);
1083 if (err) {
1084 netdev_err(nic->netdev, "Failed to delete MCAM flow entry %d\n",
1085 entry);
1086 mutex_unlock(&nic->mbox.lock);
1087 return -EFAULT;
1088 }
1089
1090 if (cntr_val) {
1091 rsp = (struct npc_delete_flow_rsp *)otx2_mbox_get_rsp(&nic->mbox.mbox,
1092 0, &req->hdr);
1093 if (IS_ERR(rsp)) {
1094 netdev_err(nic->netdev, "Failed to get MCAM delete response for entry %d\n",
1095 entry);
1096 mutex_unlock(&nic->mbox.lock);
1097 return -EFAULT;
1098 }
1099
1100 *cntr_val = rsp->cntr_val;
1101 }
1102
1103 mutex_unlock(&nic->mbox.lock);
1104 return 0;
1105 }
1106
otx2_tc_update_mcam_table_del_req(struct otx2_nic * nic,struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node)1107 static int otx2_tc_update_mcam_table_del_req(struct otx2_nic *nic,
1108 struct otx2_flow_config *flow_cfg,
1109 struct otx2_tc_flow *node)
1110 {
1111 struct list_head *pos, *n;
1112 struct otx2_tc_flow *tmp;
1113 int i = 0, index = 0;
1114 u16 cntr_val = 0;
1115
1116 /* Find and delete the entry from the list and re-install
1117 * all the entries from beginning to the index of the
1118 * deleted entry to higher mcam indexes.
1119 */
1120 list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
1121 tmp = list_entry(pos, struct otx2_tc_flow, list);
1122 if (node == tmp) {
1123 list_del(&tmp->list);
1124 break;
1125 }
1126
1127 otx2_del_mcam_flow_entry(nic, tmp->entry, &cntr_val);
1128 tmp->entry++;
1129 tmp->req.entry = tmp->entry;
1130 tmp->req.cntr_val = cntr_val;
1131 index++;
1132 }
1133
1134 list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
1135 if (i == index)
1136 break;
1137
1138 tmp = list_entry(pos, struct otx2_tc_flow, list);
1139 otx2_add_mcam_flow_entry(nic, &tmp->req);
1140 i++;
1141 }
1142
1143 return 0;
1144 }
1145
otx2_tc_update_mcam_table_add_req(struct otx2_nic * nic,struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node)1146 static int otx2_tc_update_mcam_table_add_req(struct otx2_nic *nic,
1147 struct otx2_flow_config *flow_cfg,
1148 struct otx2_tc_flow *node)
1149 {
1150 int mcam_idx = flow_cfg->max_flows - flow_cfg->nr_flows - 1;
1151 struct otx2_tc_flow *tmp;
1152 int list_idx, i;
1153 u16 cntr_val = 0;
1154
1155 /* Find the index of the entry(list_idx) whose priority
1156 * is greater than the new entry and re-install all
1157 * the entries from beginning to list_idx to higher
1158 * mcam indexes.
1159 */
1160 list_idx = otx2_tc_add_to_flow_list(flow_cfg, node);
1161 for (i = 0; i < list_idx; i++) {
1162 tmp = otx2_tc_get_entry_by_index(flow_cfg, i);
1163 if (!tmp)
1164 return -ENOMEM;
1165
1166 otx2_del_mcam_flow_entry(nic, tmp->entry, &cntr_val);
1167 tmp->entry = flow_cfg->flow_ent[mcam_idx];
1168 tmp->req.entry = tmp->entry;
1169 tmp->req.cntr_val = cntr_val;
1170 otx2_add_mcam_flow_entry(nic, &tmp->req);
1171 mcam_idx++;
1172 }
1173
1174 return mcam_idx;
1175 }
1176
otx2_tc_update_mcam_table(struct otx2_nic * nic,struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node,bool add_req)1177 static int otx2_tc_update_mcam_table(struct otx2_nic *nic,
1178 struct otx2_flow_config *flow_cfg,
1179 struct otx2_tc_flow *node,
1180 bool add_req)
1181 {
1182 if (add_req)
1183 return otx2_tc_update_mcam_table_add_req(nic, flow_cfg, node);
1184
1185 return otx2_tc_update_mcam_table_del_req(nic, flow_cfg, node);
1186 }
1187
otx2_tc_del_flow(struct otx2_nic * nic,struct flow_cls_offload * tc_flow_cmd)1188 static int otx2_tc_del_flow(struct otx2_nic *nic,
1189 struct flow_cls_offload *tc_flow_cmd)
1190 {
1191 struct otx2_flow_config *flow_cfg = nic->flow_cfg;
1192 struct nix_mcast_grp_destroy_req *grp_destroy_req;
1193 struct otx2_tc_flow *flow_node;
1194 int err;
1195
1196 flow_node = otx2_tc_get_entry_by_cookie(flow_cfg, tc_flow_cmd->cookie);
1197 if (!flow_node) {
1198 netdev_err(nic->netdev, "tc flow not found for cookie 0x%lx\n",
1199 tc_flow_cmd->cookie);
1200 return -EINVAL;
1201 }
1202
1203 /* Disable TC MARK flag if they are no rules with skbedit mark action */
1204 if (flow_node->req.match_id)
1205 if (!refcount_dec_and_test(&flow_cfg->mark_flows))
1206 nic->flags &= ~OTX2_FLAG_TC_MARK_ENABLED;
1207
1208 if (flow_node->is_act_police) {
1209 __clear_bit(flow_node->rq, &nic->rq_bmap);
1210
1211 if (nic->flags & OTX2_FLAG_INTF_DOWN)
1212 goto free_mcam_flow;
1213
1214 mutex_lock(&nic->mbox.lock);
1215
1216 err = cn10k_map_unmap_rq_policer(nic, flow_node->rq,
1217 flow_node->leaf_profile, false);
1218 if (err)
1219 netdev_err(nic->netdev,
1220 "Unmapping RQ %d & profile %d failed\n",
1221 flow_node->rq, flow_node->leaf_profile);
1222
1223 err = cn10k_free_leaf_profile(nic, flow_node->leaf_profile);
1224 if (err)
1225 netdev_err(nic->netdev,
1226 "Unable to free leaf bandwidth profile(%d)\n",
1227 flow_node->leaf_profile);
1228
1229 mutex_unlock(&nic->mbox.lock);
1230 }
1231 /* Remove the multicast/mirror related nodes */
1232 if (flow_node->mcast_grp_idx != MCAST_INVALID_GRP) {
1233 mutex_lock(&nic->mbox.lock);
1234 grp_destroy_req = otx2_mbox_alloc_msg_nix_mcast_grp_destroy(&nic->mbox);
1235 grp_destroy_req->mcast_grp_idx = flow_node->mcast_grp_idx;
1236 otx2_sync_mbox_msg(&nic->mbox);
1237 mutex_unlock(&nic->mbox.lock);
1238 }
1239
1240
1241 free_mcam_flow:
1242 otx2_del_mcam_flow_entry(nic, flow_node->entry, NULL);
1243 otx2_tc_update_mcam_table(nic, flow_cfg, flow_node, false);
1244 kfree_rcu(flow_node, rcu);
1245 flow_cfg->nr_flows--;
1246 return 0;
1247 }
1248
otx2_tc_add_flow(struct otx2_nic * nic,struct flow_cls_offload * tc_flow_cmd)1249 static int otx2_tc_add_flow(struct otx2_nic *nic,
1250 struct flow_cls_offload *tc_flow_cmd)
1251 {
1252 struct netlink_ext_ack *extack = tc_flow_cmd->common.extack;
1253 struct otx2_flow_config *flow_cfg = nic->flow_cfg;
1254 struct otx2_tc_flow *new_node, *old_node;
1255 struct npc_install_flow_req *req, dummy;
1256 int rc, err, mcam_idx;
1257
1258 if (!(nic->flags & OTX2_FLAG_TC_FLOWER_SUPPORT))
1259 return -ENOMEM;
1260
1261 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
1262 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
1263 return -EINVAL;
1264 }
1265
1266 if (flow_cfg->nr_flows == flow_cfg->max_flows) {
1267 NL_SET_ERR_MSG_MOD(extack,
1268 "Free MCAM entry not available to add the flow");
1269 return -ENOMEM;
1270 }
1271
1272 /* allocate memory for the new flow and it's node */
1273 new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
1274 if (!new_node)
1275 return -ENOMEM;
1276 spin_lock_init(&new_node->lock);
1277 new_node->cookie = tc_flow_cmd->cookie;
1278 new_node->prio = tc_flow_cmd->common.prio;
1279 new_node->mcast_grp_idx = MCAST_INVALID_GRP;
1280
1281 memset(&dummy, 0, sizeof(struct npc_install_flow_req));
1282
1283 rc = otx2_tc_prepare_flow(nic, new_node, tc_flow_cmd, &dummy);
1284 if (rc) {
1285 kfree_rcu(new_node, rcu);
1286 return rc;
1287 }
1288
1289 /* If a flow exists with the same cookie, delete it */
1290 old_node = otx2_tc_get_entry_by_cookie(flow_cfg, tc_flow_cmd->cookie);
1291 if (old_node)
1292 otx2_tc_del_flow(nic, tc_flow_cmd);
1293
1294 mcam_idx = otx2_tc_update_mcam_table(nic, flow_cfg, new_node, true);
1295 mutex_lock(&nic->mbox.lock);
1296 req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
1297 if (!req) {
1298 mutex_unlock(&nic->mbox.lock);
1299 rc = -ENOMEM;
1300 goto free_leaf;
1301 }
1302
1303 memcpy(&dummy.hdr, &req->hdr, sizeof(struct mbox_msghdr));
1304 memcpy(req, &dummy, sizeof(struct npc_install_flow_req));
1305 req->channel = nic->hw.rx_chan_base;
1306 req->entry = flow_cfg->flow_ent[mcam_idx];
1307 req->intf = NIX_INTF_RX;
1308 req->vf = nic->pcifunc;
1309 req->set_cntr = 1;
1310 new_node->entry = req->entry;
1311
1312 /* Send message to AF */
1313 rc = otx2_sync_mbox_msg(&nic->mbox);
1314 if (rc) {
1315 NL_SET_ERR_MSG_MOD(extack, "Failed to install MCAM flow entry");
1316 mutex_unlock(&nic->mbox.lock);
1317 goto free_leaf;
1318 }
1319
1320 mutex_unlock(&nic->mbox.lock);
1321 memcpy(&new_node->req, req, sizeof(struct npc_install_flow_req));
1322
1323 flow_cfg->nr_flows++;
1324 return 0;
1325
1326 free_leaf:
1327 otx2_tc_del_from_flow_list(flow_cfg, new_node);
1328 kfree_rcu(new_node, rcu);
1329 if (new_node->is_act_police) {
1330 mutex_lock(&nic->mbox.lock);
1331
1332 err = cn10k_map_unmap_rq_policer(nic, new_node->rq,
1333 new_node->leaf_profile, false);
1334 if (err)
1335 netdev_err(nic->netdev,
1336 "Unmapping RQ %d & profile %d failed\n",
1337 new_node->rq, new_node->leaf_profile);
1338 err = cn10k_free_leaf_profile(nic, new_node->leaf_profile);
1339 if (err)
1340 netdev_err(nic->netdev,
1341 "Unable to free leaf bandwidth profile(%d)\n",
1342 new_node->leaf_profile);
1343
1344 __clear_bit(new_node->rq, &nic->rq_bmap);
1345
1346 mutex_unlock(&nic->mbox.lock);
1347 }
1348
1349 return rc;
1350 }
1351
otx2_tc_get_flow_stats(struct otx2_nic * nic,struct flow_cls_offload * tc_flow_cmd)1352 static int otx2_tc_get_flow_stats(struct otx2_nic *nic,
1353 struct flow_cls_offload *tc_flow_cmd)
1354 {
1355 struct npc_mcam_get_stats_req *req;
1356 struct npc_mcam_get_stats_rsp *rsp;
1357 struct otx2_tc_flow_stats *stats;
1358 struct otx2_tc_flow *flow_node;
1359 int err;
1360
1361 flow_node = otx2_tc_get_entry_by_cookie(nic->flow_cfg, tc_flow_cmd->cookie);
1362 if (!flow_node) {
1363 netdev_info(nic->netdev, "tc flow not found for cookie %lx",
1364 tc_flow_cmd->cookie);
1365 return -EINVAL;
1366 }
1367
1368 mutex_lock(&nic->mbox.lock);
1369
1370 req = otx2_mbox_alloc_msg_npc_mcam_entry_stats(&nic->mbox);
1371 if (!req) {
1372 mutex_unlock(&nic->mbox.lock);
1373 return -ENOMEM;
1374 }
1375
1376 req->entry = flow_node->entry;
1377
1378 err = otx2_sync_mbox_msg(&nic->mbox);
1379 if (err) {
1380 netdev_err(nic->netdev, "Failed to get stats for MCAM flow entry %d\n",
1381 req->entry);
1382 mutex_unlock(&nic->mbox.lock);
1383 return -EFAULT;
1384 }
1385
1386 rsp = (struct npc_mcam_get_stats_rsp *)otx2_mbox_get_rsp
1387 (&nic->mbox.mbox, 0, &req->hdr);
1388 if (IS_ERR(rsp)) {
1389 mutex_unlock(&nic->mbox.lock);
1390 return PTR_ERR(rsp);
1391 }
1392
1393 mutex_unlock(&nic->mbox.lock);
1394
1395 if (!rsp->stat_ena)
1396 return -EINVAL;
1397
1398 stats = &flow_node->stats;
1399
1400 spin_lock(&flow_node->lock);
1401 flow_stats_update(&tc_flow_cmd->stats, 0x0, rsp->stat - stats->pkts, 0x0, 0x0,
1402 FLOW_ACTION_HW_STATS_IMMEDIATE);
1403 stats->pkts = rsp->stat;
1404 spin_unlock(&flow_node->lock);
1405
1406 return 0;
1407 }
1408
otx2_setup_tc_cls_flower(struct otx2_nic * nic,struct flow_cls_offload * cls_flower)1409 int otx2_setup_tc_cls_flower(struct otx2_nic *nic,
1410 struct flow_cls_offload *cls_flower)
1411 {
1412 switch (cls_flower->command) {
1413 case FLOW_CLS_REPLACE:
1414 return otx2_tc_add_flow(nic, cls_flower);
1415 case FLOW_CLS_DESTROY:
1416 return otx2_tc_del_flow(nic, cls_flower);
1417 case FLOW_CLS_STATS:
1418 return otx2_tc_get_flow_stats(nic, cls_flower);
1419 default:
1420 return -EOPNOTSUPP;
1421 }
1422 }
1423 EXPORT_SYMBOL(otx2_setup_tc_cls_flower);
1424
otx2_tc_ingress_matchall_install(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls)1425 static int otx2_tc_ingress_matchall_install(struct otx2_nic *nic,
1426 struct tc_cls_matchall_offload *cls)
1427 {
1428 struct netlink_ext_ack *extack = cls->common.extack;
1429 struct flow_action *actions = &cls->rule->action;
1430 struct flow_action_entry *entry;
1431 u64 rate;
1432 int err;
1433
1434 err = otx2_tc_validate_flow(nic, actions, extack);
1435 if (err)
1436 return err;
1437
1438 if (nic->flags & OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED) {
1439 NL_SET_ERR_MSG_MOD(extack,
1440 "Only one ingress MATCHALL ratelimitter can be offloaded");
1441 return -ENOMEM;
1442 }
1443
1444 entry = &cls->rule->action.entries[0];
1445 switch (entry->id) {
1446 case FLOW_ACTION_POLICE:
1447 /* Ingress ratelimiting is not supported on OcteonTx2 */
1448 if (is_dev_otx2(nic->pdev)) {
1449 NL_SET_ERR_MSG_MOD(extack,
1450 "Ingress policing not supported on this platform");
1451 return -EOPNOTSUPP;
1452 }
1453
1454 err = cn10k_alloc_matchall_ipolicer(nic);
1455 if (err)
1456 return err;
1457
1458 /* Convert to bits per second */
1459 rate = entry->police.rate_bytes_ps * 8;
1460 err = cn10k_set_matchall_ipolicer_rate(nic, entry->police.burst, rate);
1461 if (err)
1462 return err;
1463 nic->flags |= OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED;
1464 break;
1465 default:
1466 NL_SET_ERR_MSG_MOD(extack,
1467 "Only police action supported with Ingress MATCHALL offload");
1468 return -EOPNOTSUPP;
1469 }
1470
1471 return 0;
1472 }
1473
otx2_tc_ingress_matchall_delete(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls)1474 static int otx2_tc_ingress_matchall_delete(struct otx2_nic *nic,
1475 struct tc_cls_matchall_offload *cls)
1476 {
1477 struct netlink_ext_ack *extack = cls->common.extack;
1478 int err;
1479
1480 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
1481 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
1482 return -EINVAL;
1483 }
1484
1485 err = cn10k_free_matchall_ipolicer(nic);
1486 nic->flags &= ~OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED;
1487 return err;
1488 }
1489
otx2_setup_tc_ingress_matchall(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls_matchall)1490 static int otx2_setup_tc_ingress_matchall(struct otx2_nic *nic,
1491 struct tc_cls_matchall_offload *cls_matchall)
1492 {
1493 switch (cls_matchall->command) {
1494 case TC_CLSMATCHALL_REPLACE:
1495 return otx2_tc_ingress_matchall_install(nic, cls_matchall);
1496 case TC_CLSMATCHALL_DESTROY:
1497 return otx2_tc_ingress_matchall_delete(nic, cls_matchall);
1498 case TC_CLSMATCHALL_STATS:
1499 default:
1500 break;
1501 }
1502
1503 return -EOPNOTSUPP;
1504 }
1505
otx2_setup_tc_block_ingress_cb(enum tc_setup_type type,void * type_data,void * cb_priv)1506 static int otx2_setup_tc_block_ingress_cb(enum tc_setup_type type,
1507 void *type_data, void *cb_priv)
1508 {
1509 struct otx2_nic *nic = cb_priv;
1510 bool ntuple;
1511
1512 if (!tc_cls_can_offload_and_chain0(nic->netdev, type_data))
1513 return -EOPNOTSUPP;
1514
1515 ntuple = nic->netdev->features & NETIF_F_NTUPLE;
1516 switch (type) {
1517 case TC_SETUP_CLSFLOWER:
1518 if (ntuple) {
1519 netdev_warn(nic->netdev,
1520 "Can't install TC flower offload rule when NTUPLE is active");
1521 return -EOPNOTSUPP;
1522 }
1523
1524 return otx2_setup_tc_cls_flower(nic, type_data);
1525 case TC_SETUP_CLSMATCHALL:
1526 return otx2_setup_tc_ingress_matchall(nic, type_data);
1527 default:
1528 break;
1529 }
1530
1531 return -EOPNOTSUPP;
1532 }
1533
otx2_setup_tc_egress_matchall(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls_matchall)1534 static int otx2_setup_tc_egress_matchall(struct otx2_nic *nic,
1535 struct tc_cls_matchall_offload *cls_matchall)
1536 {
1537 switch (cls_matchall->command) {
1538 case TC_CLSMATCHALL_REPLACE:
1539 return otx2_tc_egress_matchall_install(nic, cls_matchall);
1540 case TC_CLSMATCHALL_DESTROY:
1541 return otx2_tc_egress_matchall_delete(nic, cls_matchall);
1542 case TC_CLSMATCHALL_STATS:
1543 default:
1544 break;
1545 }
1546
1547 return -EOPNOTSUPP;
1548 }
1549
otx2_setup_tc_block_egress_cb(enum tc_setup_type type,void * type_data,void * cb_priv)1550 static int otx2_setup_tc_block_egress_cb(enum tc_setup_type type,
1551 void *type_data, void *cb_priv)
1552 {
1553 struct otx2_nic *nic = cb_priv;
1554
1555 if (!tc_cls_can_offload_and_chain0(nic->netdev, type_data))
1556 return -EOPNOTSUPP;
1557
1558 switch (type) {
1559 case TC_SETUP_CLSMATCHALL:
1560 return otx2_setup_tc_egress_matchall(nic, type_data);
1561 default:
1562 break;
1563 }
1564
1565 return -EOPNOTSUPP;
1566 }
1567
1568 static LIST_HEAD(otx2_block_cb_list);
1569
otx2_setup_tc_block(struct net_device * netdev,struct flow_block_offload * f)1570 static int otx2_setup_tc_block(struct net_device *netdev,
1571 struct flow_block_offload *f)
1572 {
1573 struct otx2_nic *nic = netdev_priv(netdev);
1574 flow_setup_cb_t *cb;
1575 bool ingress;
1576
1577 if (f->block_shared)
1578 return -EOPNOTSUPP;
1579
1580 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) {
1581 cb = otx2_setup_tc_block_ingress_cb;
1582 ingress = true;
1583 } else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) {
1584 cb = otx2_setup_tc_block_egress_cb;
1585 ingress = false;
1586 } else {
1587 return -EOPNOTSUPP;
1588 }
1589
1590 return flow_block_cb_setup_simple(f, &otx2_block_cb_list, cb,
1591 nic, nic, ingress);
1592 }
1593
otx2_setup_tc(struct net_device * netdev,enum tc_setup_type type,void * type_data)1594 int otx2_setup_tc(struct net_device *netdev, enum tc_setup_type type,
1595 void *type_data)
1596 {
1597 switch (type) {
1598 case TC_SETUP_BLOCK:
1599 return otx2_setup_tc_block(netdev, type_data);
1600 case TC_SETUP_QDISC_HTB:
1601 return otx2_setup_tc_htb(netdev, type_data);
1602 default:
1603 return -EOPNOTSUPP;
1604 }
1605 }
1606 EXPORT_SYMBOL(otx2_setup_tc);
1607
otx2_init_tc(struct otx2_nic * nic)1608 int otx2_init_tc(struct otx2_nic *nic)
1609 {
1610 /* Exclude receive queue 0 being used for police action */
1611 set_bit(0, &nic->rq_bmap);
1612
1613 if (!nic->flow_cfg) {
1614 netdev_err(nic->netdev,
1615 "Can't init TC, nic->flow_cfg is not setup\n");
1616 return -EINVAL;
1617 }
1618
1619 return 0;
1620 }
1621 EXPORT_SYMBOL(otx2_init_tc);
1622
otx2_shutdown_tc(struct otx2_nic * nic)1623 void otx2_shutdown_tc(struct otx2_nic *nic)
1624 {
1625 otx2_destroy_tc_flow_list(nic);
1626 }
1627 EXPORT_SYMBOL(otx2_shutdown_tc);
1628
otx2_tc_config_ingress_rule(struct otx2_nic * nic,struct otx2_tc_flow * node)1629 static void otx2_tc_config_ingress_rule(struct otx2_nic *nic,
1630 struct otx2_tc_flow *node)
1631 {
1632 struct npc_install_flow_req *req;
1633
1634 if (otx2_tc_act_set_hw_police(nic, node))
1635 return;
1636
1637 mutex_lock(&nic->mbox.lock);
1638
1639 req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
1640 if (!req)
1641 goto err;
1642
1643 memcpy(req, &node->req, sizeof(struct npc_install_flow_req));
1644
1645 if (otx2_sync_mbox_msg(&nic->mbox))
1646 netdev_err(nic->netdev,
1647 "Failed to install MCAM flow entry for ingress rule");
1648 err:
1649 mutex_unlock(&nic->mbox.lock);
1650 }
1651
otx2_tc_apply_ingress_police_rules(struct otx2_nic * nic)1652 void otx2_tc_apply_ingress_police_rules(struct otx2_nic *nic)
1653 {
1654 struct otx2_flow_config *flow_cfg = nic->flow_cfg;
1655 struct otx2_tc_flow *node;
1656
1657 /* If any ingress policer rules exist for the interface then
1658 * apply those rules. Ingress policer rules depend on bandwidth
1659 * profiles linked to the receive queues. Since no receive queues
1660 * exist when interface is down, ingress policer rules are stored
1661 * and configured in hardware after all receive queues are allocated
1662 * in otx2_open.
1663 */
1664 list_for_each_entry(node, &flow_cfg->flow_list_tc, list) {
1665 if (node->is_act_police)
1666 otx2_tc_config_ingress_rule(nic, node);
1667 }
1668 }
1669 EXPORT_SYMBOL(otx2_tc_apply_ingress_police_rules);
1670