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 u32 burst, mark = 0;
447 u8 nr_police = 0;
448 u8 num_intf = 1;
449 int err, i;
450 u64 rate;
451
452 if (!flow_action_has_entries(flow_action)) {
453 NL_SET_ERR_MSG_MOD(extack, "no tc actions specified");
454 return -EINVAL;
455 }
456
457 flow_action_for_each(i, act, flow_action) {
458 switch (act->id) {
459 case FLOW_ACTION_DROP:
460 req->op = NIX_RX_ACTIONOP_DROP;
461 return 0;
462 case FLOW_ACTION_ACCEPT:
463 req->op = NIX_RX_ACTION_DEFAULT;
464 return 0;
465 case FLOW_ACTION_REDIRECT_INGRESS:
466 target = act->dev;
467 priv = netdev_priv(target);
468 /* npc_install_flow_req doesn't support passing a target pcifunc */
469 if (rvu_get_pf(nic->pcifunc) != rvu_get_pf(priv->pcifunc)) {
470 NL_SET_ERR_MSG_MOD(extack,
471 "can't redirect to other pf/vf");
472 return -EOPNOTSUPP;
473 }
474 req->vf = priv->pcifunc & RVU_PFVF_FUNC_MASK;
475
476 /* if op is already set; avoid overwriting the same */
477 if (!req->op)
478 req->op = NIX_RX_ACTION_DEFAULT;
479 break;
480
481 case FLOW_ACTION_VLAN_POP:
482 req->vtag0_valid = true;
483 /* use RX_VTAG_TYPE7 which is initialized to strip vlan tag */
484 req->vtag0_type = NIX_AF_LFX_RX_VTAG_TYPE7;
485 break;
486 case FLOW_ACTION_POLICE:
487 /* Ingress ratelimiting is not supported on OcteonTx2 */
488 if (is_dev_otx2(nic->pdev)) {
489 NL_SET_ERR_MSG_MOD(extack,
490 "Ingress policing not supported on this platform");
491 return -EOPNOTSUPP;
492 }
493
494 err = otx2_policer_validate(flow_action, act, extack);
495 if (err)
496 return err;
497
498 if (act->police.rate_bytes_ps > 0) {
499 rate = act->police.rate_bytes_ps * 8;
500 burst = act->police.burst;
501 } else if (act->police.rate_pkt_ps > 0) {
502 /* The algorithm used to calculate rate
503 * mantissa, exponent values for a given token
504 * rate (token can be byte or packet) requires
505 * token rate to be mutiplied by 8.
506 */
507 rate = act->police.rate_pkt_ps * 8;
508 burst = act->police.burst_pkt;
509 pps = true;
510 }
511 nr_police++;
512 break;
513 case FLOW_ACTION_MARK:
514 if (act->mark & ~OTX2_RX_MATCH_ID_MASK) {
515 NL_SET_ERR_MSG_MOD(extack, "Bad flow mark, only 16 bit supported");
516 return -EOPNOTSUPP;
517 }
518 mark = act->mark;
519 req->match_id = mark & OTX2_RX_MATCH_ID_MASK;
520 req->op = NIX_RX_ACTION_DEFAULT;
521 nic->flags |= OTX2_FLAG_TC_MARK_ENABLED;
522 refcount_inc(&nic->flow_cfg->mark_flows);
523 break;
524
525 case FLOW_ACTION_RX_QUEUE_MAPPING:
526 req->op = NIX_RX_ACTIONOP_UCAST;
527 req->index = act->rx_queue;
528 break;
529
530 case FLOW_ACTION_MIRRED_INGRESS:
531 target = act->dev;
532 priv = netdev_priv(target);
533 dummy_grp_update_req.pcifunc[num_intf] = priv->pcifunc;
534 dummy_grp_update_req.channel[num_intf] = priv->hw.tx_chan_base;
535 dummy_grp_update_req.dest_type[num_intf] = NIX_RX_RSS;
536 dummy_grp_update_req.rq_rss_index[num_intf] = 0;
537 mcast = true;
538 num_intf++;
539 break;
540
541 default:
542 return -EOPNOTSUPP;
543 }
544 }
545
546 if (mcast) {
547 err = otx2_tc_update_mcast(nic, req, extack, node,
548 &dummy_grp_update_req,
549 num_intf);
550 if (err)
551 return err;
552 }
553
554 if (nr_police > 1) {
555 NL_SET_ERR_MSG_MOD(extack,
556 "rate limit police offload requires a single action");
557 return -EOPNOTSUPP;
558 }
559
560 if (nr_police)
561 return otx2_tc_act_set_police(nic, node, f, rate, burst,
562 mark, req, pps);
563
564 return 0;
565 }
566
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)567 static int otx2_tc_process_vlan(struct otx2_nic *nic, struct flow_msg *flow_spec,
568 struct flow_msg *flow_mask, struct flow_rule *rule,
569 struct npc_install_flow_req *req, bool is_inner)
570 {
571 struct flow_match_vlan match;
572 u16 vlan_tci, vlan_tci_mask;
573
574 if (is_inner)
575 flow_rule_match_cvlan(rule, &match);
576 else
577 flow_rule_match_vlan(rule, &match);
578
579 if (!eth_type_vlan(match.key->vlan_tpid)) {
580 netdev_err(nic->netdev, "vlan tpid 0x%x not supported\n",
581 ntohs(match.key->vlan_tpid));
582 return -EOPNOTSUPP;
583 }
584
585 if (!match.mask->vlan_id) {
586 struct flow_action_entry *act;
587 int i;
588
589 flow_action_for_each(i, act, &rule->action) {
590 if (act->id == FLOW_ACTION_DROP) {
591 netdev_err(nic->netdev,
592 "vlan tpid 0x%x with vlan_id %d is not supported for DROP rule.\n",
593 ntohs(match.key->vlan_tpid), match.key->vlan_id);
594 return -EOPNOTSUPP;
595 }
596 }
597 }
598
599 if (match.mask->vlan_id ||
600 match.mask->vlan_dei ||
601 match.mask->vlan_priority) {
602 vlan_tci = match.key->vlan_id |
603 match.key->vlan_dei << 12 |
604 match.key->vlan_priority << 13;
605
606 vlan_tci_mask = match.mask->vlan_id |
607 match.mask->vlan_dei << 12 |
608 match.mask->vlan_priority << 13;
609 if (is_inner) {
610 flow_spec->vlan_itci = htons(vlan_tci);
611 flow_mask->vlan_itci = htons(vlan_tci_mask);
612 req->features |= BIT_ULL(NPC_INNER_VID);
613 } else {
614 flow_spec->vlan_tci = htons(vlan_tci);
615 flow_mask->vlan_tci = htons(vlan_tci_mask);
616 req->features |= BIT_ULL(NPC_OUTER_VID);
617 }
618 }
619
620 return 0;
621 }
622
otx2_tc_prepare_flow(struct otx2_nic * nic,struct otx2_tc_flow * node,struct flow_cls_offload * f,struct npc_install_flow_req * req)623 static int otx2_tc_prepare_flow(struct otx2_nic *nic, struct otx2_tc_flow *node,
624 struct flow_cls_offload *f,
625 struct npc_install_flow_req *req)
626 {
627 struct netlink_ext_ack *extack = f->common.extack;
628 struct flow_msg *flow_spec = &req->packet;
629 struct flow_msg *flow_mask = &req->mask;
630 struct flow_dissector *dissector;
631 struct flow_rule *rule;
632 u8 ip_proto = 0;
633
634 rule = flow_cls_offload_flow_rule(f);
635 dissector = rule->match.dissector;
636
637 if ((dissector->used_keys &
638 ~(BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
639 BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
640 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
641 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN) |
642 BIT(FLOW_DISSECTOR_KEY_CVLAN) |
643 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
644 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
645 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) |
646 BIT(FLOW_DISSECTOR_KEY_IPSEC) |
647 BIT_ULL(FLOW_DISSECTOR_KEY_MPLS) |
648 BIT_ULL(FLOW_DISSECTOR_KEY_ICMP) |
649 BIT_ULL(FLOW_DISSECTOR_KEY_TCP) |
650 BIT_ULL(FLOW_DISSECTOR_KEY_IP)))) {
651 netdev_info(nic->netdev, "unsupported flow used key 0x%llx",
652 dissector->used_keys);
653 return -EOPNOTSUPP;
654 }
655
656 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
657 struct flow_match_basic match;
658
659 flow_rule_match_basic(rule, &match);
660
661 /* All EtherTypes can be matched, no hw limitation */
662 flow_spec->etype = match.key->n_proto;
663 flow_mask->etype = match.mask->n_proto;
664 req->features |= BIT_ULL(NPC_ETYPE);
665
666 if (match.mask->ip_proto &&
667 (match.key->ip_proto != IPPROTO_TCP &&
668 match.key->ip_proto != IPPROTO_UDP &&
669 match.key->ip_proto != IPPROTO_SCTP &&
670 match.key->ip_proto != IPPROTO_ICMP &&
671 match.key->ip_proto != IPPROTO_ESP &&
672 match.key->ip_proto != IPPROTO_AH &&
673 match.key->ip_proto != IPPROTO_ICMPV6)) {
674 netdev_info(nic->netdev,
675 "ip_proto=0x%x not supported\n",
676 match.key->ip_proto);
677 return -EOPNOTSUPP;
678 }
679 if (match.mask->ip_proto)
680 ip_proto = match.key->ip_proto;
681
682 if (ip_proto == IPPROTO_UDP)
683 req->features |= BIT_ULL(NPC_IPPROTO_UDP);
684 else if (ip_proto == IPPROTO_TCP)
685 req->features |= BIT_ULL(NPC_IPPROTO_TCP);
686 else if (ip_proto == IPPROTO_SCTP)
687 req->features |= BIT_ULL(NPC_IPPROTO_SCTP);
688 else if (ip_proto == IPPROTO_ICMP)
689 req->features |= BIT_ULL(NPC_IPPROTO_ICMP);
690 else if (ip_proto == IPPROTO_ICMPV6)
691 req->features |= BIT_ULL(NPC_IPPROTO_ICMP6);
692 else if (ip_proto == IPPROTO_ESP)
693 req->features |= BIT_ULL(NPC_IPPROTO_ESP);
694 else if (ip_proto == IPPROTO_AH)
695 req->features |= BIT_ULL(NPC_IPPROTO_AH);
696 }
697
698 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
699 struct flow_match_control match;
700 u32 val;
701
702 flow_rule_match_control(rule, &match);
703
704 if (match.mask->flags & FLOW_DIS_IS_FRAGMENT) {
705 val = match.key->flags & FLOW_DIS_IS_FRAGMENT;
706 if (ntohs(flow_spec->etype) == ETH_P_IP) {
707 flow_spec->ip_flag = val ? IPV4_FLAG_MORE : 0;
708 flow_mask->ip_flag = IPV4_FLAG_MORE;
709 req->features |= BIT_ULL(NPC_IPFRAG_IPV4);
710 } else if (ntohs(flow_spec->etype) == ETH_P_IPV6) {
711 flow_spec->next_header = val ?
712 IPPROTO_FRAGMENT : 0;
713 flow_mask->next_header = 0xff;
714 req->features |= BIT_ULL(NPC_IPFRAG_IPV6);
715 } else {
716 NL_SET_ERR_MSG_MOD(extack, "flow-type should be either IPv4 and IPv6");
717 return -EOPNOTSUPP;
718 }
719 }
720
721 if (!flow_rule_is_supp_control_flags(FLOW_DIS_IS_FRAGMENT,
722 match.mask->flags, extack))
723 return -EOPNOTSUPP;
724 }
725
726 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
727 struct flow_match_eth_addrs match;
728
729 flow_rule_match_eth_addrs(rule, &match);
730 if (!is_zero_ether_addr(match.mask->src)) {
731 NL_SET_ERR_MSG_MOD(extack, "src mac match not supported");
732 return -EOPNOTSUPP;
733 }
734
735 if (!is_zero_ether_addr(match.mask->dst)) {
736 ether_addr_copy(flow_spec->dmac, (u8 *)&match.key->dst);
737 ether_addr_copy(flow_mask->dmac,
738 (u8 *)&match.mask->dst);
739 req->features |= BIT_ULL(NPC_DMAC);
740 }
741 }
742
743 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPSEC)) {
744 struct flow_match_ipsec match;
745
746 flow_rule_match_ipsec(rule, &match);
747 if (!match.mask->spi) {
748 NL_SET_ERR_MSG_MOD(extack, "spi index not specified");
749 return -EOPNOTSUPP;
750 }
751 if (ip_proto != IPPROTO_ESP &&
752 ip_proto != IPPROTO_AH) {
753 NL_SET_ERR_MSG_MOD(extack,
754 "SPI index is valid only for ESP/AH proto");
755 return -EOPNOTSUPP;
756 }
757
758 flow_spec->spi = match.key->spi;
759 flow_mask->spi = match.mask->spi;
760 req->features |= BIT_ULL(NPC_IPSEC_SPI);
761 }
762
763 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP)) {
764 struct flow_match_ip match;
765
766 flow_rule_match_ip(rule, &match);
767 if ((ntohs(flow_spec->etype) != ETH_P_IP) &&
768 match.mask->tos) {
769 NL_SET_ERR_MSG_MOD(extack, "tos not supported");
770 return -EOPNOTSUPP;
771 }
772 if (match.mask->ttl) {
773 NL_SET_ERR_MSG_MOD(extack, "ttl not supported");
774 return -EOPNOTSUPP;
775 }
776 flow_spec->tos = match.key->tos;
777 flow_mask->tos = match.mask->tos;
778 req->features |= BIT_ULL(NPC_TOS);
779 }
780
781 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
782 int ret;
783
784 ret = otx2_tc_process_vlan(nic, flow_spec, flow_mask, rule, req, false);
785 if (ret)
786 return ret;
787 }
788
789 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN)) {
790 int ret;
791
792 ret = otx2_tc_process_vlan(nic, flow_spec, flow_mask, rule, req, true);
793 if (ret)
794 return ret;
795 }
796
797 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
798 struct flow_match_ipv4_addrs match;
799
800 flow_rule_match_ipv4_addrs(rule, &match);
801
802 flow_spec->ip4dst = match.key->dst;
803 flow_mask->ip4dst = match.mask->dst;
804 req->features |= BIT_ULL(NPC_DIP_IPV4);
805
806 flow_spec->ip4src = match.key->src;
807 flow_mask->ip4src = match.mask->src;
808 req->features |= BIT_ULL(NPC_SIP_IPV4);
809 } else if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
810 struct flow_match_ipv6_addrs match;
811
812 flow_rule_match_ipv6_addrs(rule, &match);
813
814 if (ipv6_addr_loopback(&match.key->dst) ||
815 ipv6_addr_loopback(&match.key->src)) {
816 NL_SET_ERR_MSG_MOD(extack,
817 "Flow matching IPv6 loopback addr not supported");
818 return -EOPNOTSUPP;
819 }
820
821 if (!ipv6_addr_any(&match.mask->dst)) {
822 memcpy(&flow_spec->ip6dst,
823 (struct in6_addr *)&match.key->dst,
824 sizeof(flow_spec->ip6dst));
825 memcpy(&flow_mask->ip6dst,
826 (struct in6_addr *)&match.mask->dst,
827 sizeof(flow_spec->ip6dst));
828 req->features |= BIT_ULL(NPC_DIP_IPV6);
829 }
830
831 if (!ipv6_addr_any(&match.mask->src)) {
832 memcpy(&flow_spec->ip6src,
833 (struct in6_addr *)&match.key->src,
834 sizeof(flow_spec->ip6src));
835 memcpy(&flow_mask->ip6src,
836 (struct in6_addr *)&match.mask->src,
837 sizeof(flow_spec->ip6src));
838 req->features |= BIT_ULL(NPC_SIP_IPV6);
839 }
840 }
841
842 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
843 struct flow_match_ports match;
844
845 flow_rule_match_ports(rule, &match);
846
847 flow_spec->dport = match.key->dst;
848 flow_mask->dport = match.mask->dst;
849
850 if (flow_mask->dport) {
851 if (ip_proto == IPPROTO_UDP)
852 req->features |= BIT_ULL(NPC_DPORT_UDP);
853 else if (ip_proto == IPPROTO_TCP)
854 req->features |= BIT_ULL(NPC_DPORT_TCP);
855 else if (ip_proto == IPPROTO_SCTP)
856 req->features |= BIT_ULL(NPC_DPORT_SCTP);
857 }
858
859 flow_spec->sport = match.key->src;
860 flow_mask->sport = match.mask->src;
861
862 if (flow_mask->sport) {
863 if (ip_proto == IPPROTO_UDP)
864 req->features |= BIT_ULL(NPC_SPORT_UDP);
865 else if (ip_proto == IPPROTO_TCP)
866 req->features |= BIT_ULL(NPC_SPORT_TCP);
867 else if (ip_proto == IPPROTO_SCTP)
868 req->features |= BIT_ULL(NPC_SPORT_SCTP);
869 }
870 }
871
872 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_TCP)) {
873 struct flow_match_tcp match;
874
875 flow_rule_match_tcp(rule, &match);
876
877 flow_spec->tcp_flags = match.key->flags;
878 flow_mask->tcp_flags = match.mask->flags;
879 req->features |= BIT_ULL(NPC_TCP_FLAGS);
880 }
881
882 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_MPLS)) {
883 struct flow_match_mpls match;
884 u8 bit;
885
886 flow_rule_match_mpls(rule, &match);
887
888 if (match.mask->used_lses & OTX2_UNSUPP_LSE_DEPTH) {
889 NL_SET_ERR_MSG_MOD(extack,
890 "unsupported LSE depth for MPLS match offload");
891 return -EOPNOTSUPP;
892 }
893
894 for_each_set_bit(bit, (unsigned long *)&match.mask->used_lses,
895 FLOW_DIS_MPLS_MAX) {
896 /* check if any of the fields LABEL,TC,BOS are set */
897 if (*((u32 *)&match.mask->ls[bit]) &
898 OTX2_FLOWER_MASK_MPLS_NON_TTL) {
899 /* Hardware will capture 4 byte MPLS header into
900 * two fields NPC_MPLSX_LBTCBOS and NPC_MPLSX_TTL.
901 * Derive the associated NPC key based on header
902 * index and offset.
903 */
904
905 req->features |= BIT_ULL(NPC_MPLS1_LBTCBOS +
906 2 * bit);
907 flow_spec->mpls_lse[bit] =
908 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_LB,
909 match.key->ls[bit].mpls_label) |
910 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_TC,
911 match.key->ls[bit].mpls_tc) |
912 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_BOS,
913 match.key->ls[bit].mpls_bos);
914
915 flow_mask->mpls_lse[bit] =
916 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_LB,
917 match.mask->ls[bit].mpls_label) |
918 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_TC,
919 match.mask->ls[bit].mpls_tc) |
920 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_BOS,
921 match.mask->ls[bit].mpls_bos);
922 }
923
924 if (match.mask->ls[bit].mpls_ttl) {
925 req->features |= BIT_ULL(NPC_MPLS1_TTL +
926 2 * bit);
927 flow_spec->mpls_lse[bit] |=
928 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_TTL,
929 match.key->ls[bit].mpls_ttl);
930 flow_mask->mpls_lse[bit] |=
931 FIELD_PREP(OTX2_FLOWER_MASK_MPLS_TTL,
932 match.mask->ls[bit].mpls_ttl);
933 }
934 }
935 }
936
937 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP)) {
938 struct flow_match_icmp match;
939
940 flow_rule_match_icmp(rule, &match);
941
942 flow_spec->icmp_type = match.key->type;
943 flow_mask->icmp_type = match.mask->type;
944 req->features |= BIT_ULL(NPC_TYPE_ICMP);
945
946 flow_spec->icmp_code = match.key->code;
947 flow_mask->icmp_code = match.mask->code;
948 req->features |= BIT_ULL(NPC_CODE_ICMP);
949 }
950 return otx2_tc_parse_actions(nic, &rule->action, req, f, node);
951 }
952
otx2_destroy_tc_flow_list(struct otx2_nic * pfvf)953 static void otx2_destroy_tc_flow_list(struct otx2_nic *pfvf)
954 {
955 struct otx2_flow_config *flow_cfg = pfvf->flow_cfg;
956 struct otx2_tc_flow *iter, *tmp;
957
958 if (!(pfvf->flags & OTX2_FLAG_MCAM_ENTRIES_ALLOC))
959 return;
960
961 list_for_each_entry_safe(iter, tmp, &flow_cfg->flow_list_tc, list) {
962 list_del(&iter->list);
963 kfree(iter);
964 flow_cfg->nr_flows--;
965 }
966 }
967
otx2_tc_get_entry_by_cookie(struct otx2_flow_config * flow_cfg,unsigned long cookie)968 static struct otx2_tc_flow *otx2_tc_get_entry_by_cookie(struct otx2_flow_config *flow_cfg,
969 unsigned long cookie)
970 {
971 struct otx2_tc_flow *tmp;
972
973 list_for_each_entry(tmp, &flow_cfg->flow_list_tc, list) {
974 if (tmp->cookie == cookie)
975 return tmp;
976 }
977
978 return NULL;
979 }
980
otx2_tc_get_entry_by_index(struct otx2_flow_config * flow_cfg,int index)981 static struct otx2_tc_flow *otx2_tc_get_entry_by_index(struct otx2_flow_config *flow_cfg,
982 int index)
983 {
984 struct otx2_tc_flow *tmp;
985 int i = 0;
986
987 list_for_each_entry(tmp, &flow_cfg->flow_list_tc, list) {
988 if (i == index)
989 return tmp;
990 i++;
991 }
992
993 return NULL;
994 }
995
otx2_tc_del_from_flow_list(struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node)996 static void otx2_tc_del_from_flow_list(struct otx2_flow_config *flow_cfg,
997 struct otx2_tc_flow *node)
998 {
999 struct list_head *pos, *n;
1000 struct otx2_tc_flow *tmp;
1001
1002 list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
1003 tmp = list_entry(pos, struct otx2_tc_flow, list);
1004 if (node == tmp) {
1005 list_del(&node->list);
1006 return;
1007 }
1008 }
1009 }
1010
otx2_tc_add_to_flow_list(struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node)1011 static int otx2_tc_add_to_flow_list(struct otx2_flow_config *flow_cfg,
1012 struct otx2_tc_flow *node)
1013 {
1014 struct list_head *pos, *n;
1015 struct otx2_tc_flow *tmp;
1016 int index = 0;
1017
1018 /* If the flow list is empty then add the new node */
1019 if (list_empty(&flow_cfg->flow_list_tc)) {
1020 list_add(&node->list, &flow_cfg->flow_list_tc);
1021 return index;
1022 }
1023
1024 list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
1025 tmp = list_entry(pos, struct otx2_tc_flow, list);
1026 if (node->prio < tmp->prio)
1027 break;
1028 index++;
1029 }
1030
1031 list_add(&node->list, pos->prev);
1032 return index;
1033 }
1034
otx2_add_mcam_flow_entry(struct otx2_nic * nic,struct npc_install_flow_req * req)1035 static int otx2_add_mcam_flow_entry(struct otx2_nic *nic, struct npc_install_flow_req *req)
1036 {
1037 struct npc_install_flow_req *tmp_req;
1038 int err;
1039
1040 mutex_lock(&nic->mbox.lock);
1041 tmp_req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
1042 if (!tmp_req) {
1043 mutex_unlock(&nic->mbox.lock);
1044 return -ENOMEM;
1045 }
1046
1047 memcpy(tmp_req, req, sizeof(struct npc_install_flow_req));
1048 /* Send message to AF */
1049 err = otx2_sync_mbox_msg(&nic->mbox);
1050 if (err) {
1051 netdev_err(nic->netdev, "Failed to install MCAM flow entry %d\n",
1052 req->entry);
1053 mutex_unlock(&nic->mbox.lock);
1054 return -EFAULT;
1055 }
1056
1057 mutex_unlock(&nic->mbox.lock);
1058 return 0;
1059 }
1060
otx2_del_mcam_flow_entry(struct otx2_nic * nic,u16 entry,u16 * cntr_val)1061 static int otx2_del_mcam_flow_entry(struct otx2_nic *nic, u16 entry, u16 *cntr_val)
1062 {
1063 struct npc_delete_flow_rsp *rsp;
1064 struct npc_delete_flow_req *req;
1065 int err;
1066
1067 mutex_lock(&nic->mbox.lock);
1068 req = otx2_mbox_alloc_msg_npc_delete_flow(&nic->mbox);
1069 if (!req) {
1070 mutex_unlock(&nic->mbox.lock);
1071 return -ENOMEM;
1072 }
1073
1074 req->entry = entry;
1075
1076 /* Send message to AF */
1077 err = otx2_sync_mbox_msg(&nic->mbox);
1078 if (err) {
1079 netdev_err(nic->netdev, "Failed to delete MCAM flow entry %d\n",
1080 entry);
1081 mutex_unlock(&nic->mbox.lock);
1082 return -EFAULT;
1083 }
1084
1085 if (cntr_val) {
1086 rsp = (struct npc_delete_flow_rsp *)otx2_mbox_get_rsp(&nic->mbox.mbox,
1087 0, &req->hdr);
1088 if (IS_ERR(rsp)) {
1089 netdev_err(nic->netdev, "Failed to get MCAM delete response for entry %d\n",
1090 entry);
1091 mutex_unlock(&nic->mbox.lock);
1092 return -EFAULT;
1093 }
1094
1095 *cntr_val = rsp->cntr_val;
1096 }
1097
1098 mutex_unlock(&nic->mbox.lock);
1099 return 0;
1100 }
1101
otx2_tc_update_mcam_table_del_req(struct otx2_nic * nic,struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node)1102 static int otx2_tc_update_mcam_table_del_req(struct otx2_nic *nic,
1103 struct otx2_flow_config *flow_cfg,
1104 struct otx2_tc_flow *node)
1105 {
1106 struct list_head *pos, *n;
1107 struct otx2_tc_flow *tmp;
1108 int i = 0, index = 0;
1109 u16 cntr_val = 0;
1110
1111 /* Find and delete the entry from the list and re-install
1112 * all the entries from beginning to the index of the
1113 * deleted entry to higher mcam indexes.
1114 */
1115 list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
1116 tmp = list_entry(pos, struct otx2_tc_flow, list);
1117 if (node == tmp) {
1118 list_del(&tmp->list);
1119 break;
1120 }
1121
1122 otx2_del_mcam_flow_entry(nic, tmp->entry, &cntr_val);
1123 tmp->entry++;
1124 tmp->req.entry = tmp->entry;
1125 tmp->req.cntr_val = cntr_val;
1126 index++;
1127 }
1128
1129 list_for_each_safe(pos, n, &flow_cfg->flow_list_tc) {
1130 if (i == index)
1131 break;
1132
1133 tmp = list_entry(pos, struct otx2_tc_flow, list);
1134 otx2_add_mcam_flow_entry(nic, &tmp->req);
1135 i++;
1136 }
1137
1138 return 0;
1139 }
1140
otx2_tc_update_mcam_table_add_req(struct otx2_nic * nic,struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node)1141 static int otx2_tc_update_mcam_table_add_req(struct otx2_nic *nic,
1142 struct otx2_flow_config *flow_cfg,
1143 struct otx2_tc_flow *node)
1144 {
1145 int mcam_idx = flow_cfg->max_flows - flow_cfg->nr_flows - 1;
1146 struct otx2_tc_flow *tmp;
1147 int list_idx, i;
1148 u16 cntr_val = 0;
1149
1150 /* Find the index of the entry(list_idx) whose priority
1151 * is greater than the new entry and re-install all
1152 * the entries from beginning to list_idx to higher
1153 * mcam indexes.
1154 */
1155 list_idx = otx2_tc_add_to_flow_list(flow_cfg, node);
1156 for (i = 0; i < list_idx; i++) {
1157 tmp = otx2_tc_get_entry_by_index(flow_cfg, i);
1158 if (!tmp)
1159 return -ENOMEM;
1160
1161 otx2_del_mcam_flow_entry(nic, tmp->entry, &cntr_val);
1162 tmp->entry = flow_cfg->flow_ent[mcam_idx];
1163 tmp->req.entry = tmp->entry;
1164 tmp->req.cntr_val = cntr_val;
1165 otx2_add_mcam_flow_entry(nic, &tmp->req);
1166 mcam_idx++;
1167 }
1168
1169 return mcam_idx;
1170 }
1171
otx2_tc_update_mcam_table(struct otx2_nic * nic,struct otx2_flow_config * flow_cfg,struct otx2_tc_flow * node,bool add_req)1172 static int otx2_tc_update_mcam_table(struct otx2_nic *nic,
1173 struct otx2_flow_config *flow_cfg,
1174 struct otx2_tc_flow *node,
1175 bool add_req)
1176 {
1177 if (add_req)
1178 return otx2_tc_update_mcam_table_add_req(nic, flow_cfg, node);
1179
1180 return otx2_tc_update_mcam_table_del_req(nic, flow_cfg, node);
1181 }
1182
otx2_tc_del_flow(struct otx2_nic * nic,struct flow_cls_offload * tc_flow_cmd)1183 static int otx2_tc_del_flow(struct otx2_nic *nic,
1184 struct flow_cls_offload *tc_flow_cmd)
1185 {
1186 struct otx2_flow_config *flow_cfg = nic->flow_cfg;
1187 struct nix_mcast_grp_destroy_req *grp_destroy_req;
1188 struct otx2_tc_flow *flow_node;
1189 int err;
1190
1191 flow_node = otx2_tc_get_entry_by_cookie(flow_cfg, tc_flow_cmd->cookie);
1192 if (!flow_node) {
1193 netdev_err(nic->netdev, "tc flow not found for cookie 0x%lx\n",
1194 tc_flow_cmd->cookie);
1195 return -EINVAL;
1196 }
1197
1198 /* Disable TC MARK flag if they are no rules with skbedit mark action */
1199 if (flow_node->req.match_id)
1200 if (!refcount_dec_and_test(&flow_cfg->mark_flows))
1201 nic->flags &= ~OTX2_FLAG_TC_MARK_ENABLED;
1202
1203 if (flow_node->is_act_police) {
1204 __clear_bit(flow_node->rq, &nic->rq_bmap);
1205
1206 if (nic->flags & OTX2_FLAG_INTF_DOWN)
1207 goto free_mcam_flow;
1208
1209 mutex_lock(&nic->mbox.lock);
1210
1211 err = cn10k_map_unmap_rq_policer(nic, flow_node->rq,
1212 flow_node->leaf_profile, false);
1213 if (err)
1214 netdev_err(nic->netdev,
1215 "Unmapping RQ %d & profile %d failed\n",
1216 flow_node->rq, flow_node->leaf_profile);
1217
1218 err = cn10k_free_leaf_profile(nic, flow_node->leaf_profile);
1219 if (err)
1220 netdev_err(nic->netdev,
1221 "Unable to free leaf bandwidth profile(%d)\n",
1222 flow_node->leaf_profile);
1223
1224 mutex_unlock(&nic->mbox.lock);
1225 }
1226 /* Remove the multicast/mirror related nodes */
1227 if (flow_node->mcast_grp_idx != MCAST_INVALID_GRP) {
1228 mutex_lock(&nic->mbox.lock);
1229 grp_destroy_req = otx2_mbox_alloc_msg_nix_mcast_grp_destroy(&nic->mbox);
1230 grp_destroy_req->mcast_grp_idx = flow_node->mcast_grp_idx;
1231 otx2_sync_mbox_msg(&nic->mbox);
1232 mutex_unlock(&nic->mbox.lock);
1233 }
1234
1235
1236 free_mcam_flow:
1237 otx2_del_mcam_flow_entry(nic, flow_node->entry, NULL);
1238 otx2_tc_update_mcam_table(nic, flow_cfg, flow_node, false);
1239 kfree_rcu(flow_node, rcu);
1240 flow_cfg->nr_flows--;
1241 return 0;
1242 }
1243
otx2_tc_add_flow(struct otx2_nic * nic,struct flow_cls_offload * tc_flow_cmd)1244 static int otx2_tc_add_flow(struct otx2_nic *nic,
1245 struct flow_cls_offload *tc_flow_cmd)
1246 {
1247 struct netlink_ext_ack *extack = tc_flow_cmd->common.extack;
1248 struct otx2_flow_config *flow_cfg = nic->flow_cfg;
1249 struct otx2_tc_flow *new_node, *old_node;
1250 struct npc_install_flow_req *req, dummy;
1251 int rc, err, mcam_idx;
1252
1253 if (!(nic->flags & OTX2_FLAG_TC_FLOWER_SUPPORT))
1254 return -ENOMEM;
1255
1256 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
1257 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
1258 return -EINVAL;
1259 }
1260
1261 if (flow_cfg->nr_flows == flow_cfg->max_flows) {
1262 NL_SET_ERR_MSG_MOD(extack,
1263 "Free MCAM entry not available to add the flow");
1264 return -ENOMEM;
1265 }
1266
1267 /* allocate memory for the new flow and it's node */
1268 new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
1269 if (!new_node)
1270 return -ENOMEM;
1271 spin_lock_init(&new_node->lock);
1272 new_node->cookie = tc_flow_cmd->cookie;
1273 new_node->prio = tc_flow_cmd->common.prio;
1274 new_node->mcast_grp_idx = MCAST_INVALID_GRP;
1275
1276 memset(&dummy, 0, sizeof(struct npc_install_flow_req));
1277
1278 rc = otx2_tc_prepare_flow(nic, new_node, tc_flow_cmd, &dummy);
1279 if (rc) {
1280 kfree_rcu(new_node, rcu);
1281 return rc;
1282 }
1283
1284 /* If a flow exists with the same cookie, delete it */
1285 old_node = otx2_tc_get_entry_by_cookie(flow_cfg, tc_flow_cmd->cookie);
1286 if (old_node)
1287 otx2_tc_del_flow(nic, tc_flow_cmd);
1288
1289 mcam_idx = otx2_tc_update_mcam_table(nic, flow_cfg, new_node, true);
1290 mutex_lock(&nic->mbox.lock);
1291 req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
1292 if (!req) {
1293 mutex_unlock(&nic->mbox.lock);
1294 rc = -ENOMEM;
1295 goto free_leaf;
1296 }
1297
1298 memcpy(&dummy.hdr, &req->hdr, sizeof(struct mbox_msghdr));
1299 memcpy(req, &dummy, sizeof(struct npc_install_flow_req));
1300 req->channel = nic->hw.rx_chan_base;
1301 req->entry = flow_cfg->flow_ent[mcam_idx];
1302 req->intf = NIX_INTF_RX;
1303 req->set_cntr = 1;
1304 new_node->entry = req->entry;
1305
1306 /* Send message to AF */
1307 rc = otx2_sync_mbox_msg(&nic->mbox);
1308 if (rc) {
1309 NL_SET_ERR_MSG_MOD(extack, "Failed to install MCAM flow entry");
1310 mutex_unlock(&nic->mbox.lock);
1311 goto free_leaf;
1312 }
1313
1314 mutex_unlock(&nic->mbox.lock);
1315 memcpy(&new_node->req, req, sizeof(struct npc_install_flow_req));
1316
1317 flow_cfg->nr_flows++;
1318 return 0;
1319
1320 free_leaf:
1321 otx2_tc_del_from_flow_list(flow_cfg, new_node);
1322 kfree_rcu(new_node, rcu);
1323 if (new_node->is_act_police) {
1324 mutex_lock(&nic->mbox.lock);
1325
1326 err = cn10k_map_unmap_rq_policer(nic, new_node->rq,
1327 new_node->leaf_profile, false);
1328 if (err)
1329 netdev_err(nic->netdev,
1330 "Unmapping RQ %d & profile %d failed\n",
1331 new_node->rq, new_node->leaf_profile);
1332 err = cn10k_free_leaf_profile(nic, new_node->leaf_profile);
1333 if (err)
1334 netdev_err(nic->netdev,
1335 "Unable to free leaf bandwidth profile(%d)\n",
1336 new_node->leaf_profile);
1337
1338 __clear_bit(new_node->rq, &nic->rq_bmap);
1339
1340 mutex_unlock(&nic->mbox.lock);
1341 }
1342
1343 return rc;
1344 }
1345
otx2_tc_get_flow_stats(struct otx2_nic * nic,struct flow_cls_offload * tc_flow_cmd)1346 static int otx2_tc_get_flow_stats(struct otx2_nic *nic,
1347 struct flow_cls_offload *tc_flow_cmd)
1348 {
1349 struct npc_mcam_get_stats_req *req;
1350 struct npc_mcam_get_stats_rsp *rsp;
1351 struct otx2_tc_flow_stats *stats;
1352 struct otx2_tc_flow *flow_node;
1353 int err;
1354
1355 flow_node = otx2_tc_get_entry_by_cookie(nic->flow_cfg, tc_flow_cmd->cookie);
1356 if (!flow_node) {
1357 netdev_info(nic->netdev, "tc flow not found for cookie %lx",
1358 tc_flow_cmd->cookie);
1359 return -EINVAL;
1360 }
1361
1362 mutex_lock(&nic->mbox.lock);
1363
1364 req = otx2_mbox_alloc_msg_npc_mcam_entry_stats(&nic->mbox);
1365 if (!req) {
1366 mutex_unlock(&nic->mbox.lock);
1367 return -ENOMEM;
1368 }
1369
1370 req->entry = flow_node->entry;
1371
1372 err = otx2_sync_mbox_msg(&nic->mbox);
1373 if (err) {
1374 netdev_err(nic->netdev, "Failed to get stats for MCAM flow entry %d\n",
1375 req->entry);
1376 mutex_unlock(&nic->mbox.lock);
1377 return -EFAULT;
1378 }
1379
1380 rsp = (struct npc_mcam_get_stats_rsp *)otx2_mbox_get_rsp
1381 (&nic->mbox.mbox, 0, &req->hdr);
1382 if (IS_ERR(rsp)) {
1383 mutex_unlock(&nic->mbox.lock);
1384 return PTR_ERR(rsp);
1385 }
1386
1387 mutex_unlock(&nic->mbox.lock);
1388
1389 if (!rsp->stat_ena)
1390 return -EINVAL;
1391
1392 stats = &flow_node->stats;
1393
1394 spin_lock(&flow_node->lock);
1395 flow_stats_update(&tc_flow_cmd->stats, 0x0, rsp->stat - stats->pkts, 0x0, 0x0,
1396 FLOW_ACTION_HW_STATS_IMMEDIATE);
1397 stats->pkts = rsp->stat;
1398 spin_unlock(&flow_node->lock);
1399
1400 return 0;
1401 }
1402
otx2_setup_tc_cls_flower(struct otx2_nic * nic,struct flow_cls_offload * cls_flower)1403 static int otx2_setup_tc_cls_flower(struct otx2_nic *nic,
1404 struct flow_cls_offload *cls_flower)
1405 {
1406 switch (cls_flower->command) {
1407 case FLOW_CLS_REPLACE:
1408 return otx2_tc_add_flow(nic, cls_flower);
1409 case FLOW_CLS_DESTROY:
1410 return otx2_tc_del_flow(nic, cls_flower);
1411 case FLOW_CLS_STATS:
1412 return otx2_tc_get_flow_stats(nic, cls_flower);
1413 default:
1414 return -EOPNOTSUPP;
1415 }
1416 }
1417
otx2_tc_ingress_matchall_install(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls)1418 static int otx2_tc_ingress_matchall_install(struct otx2_nic *nic,
1419 struct tc_cls_matchall_offload *cls)
1420 {
1421 struct netlink_ext_ack *extack = cls->common.extack;
1422 struct flow_action *actions = &cls->rule->action;
1423 struct flow_action_entry *entry;
1424 u64 rate;
1425 int err;
1426
1427 err = otx2_tc_validate_flow(nic, actions, extack);
1428 if (err)
1429 return err;
1430
1431 if (nic->flags & OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED) {
1432 NL_SET_ERR_MSG_MOD(extack,
1433 "Only one ingress MATCHALL ratelimitter can be offloaded");
1434 return -ENOMEM;
1435 }
1436
1437 entry = &cls->rule->action.entries[0];
1438 switch (entry->id) {
1439 case FLOW_ACTION_POLICE:
1440 /* Ingress ratelimiting is not supported on OcteonTx2 */
1441 if (is_dev_otx2(nic->pdev)) {
1442 NL_SET_ERR_MSG_MOD(extack,
1443 "Ingress policing not supported on this platform");
1444 return -EOPNOTSUPP;
1445 }
1446
1447 err = cn10k_alloc_matchall_ipolicer(nic);
1448 if (err)
1449 return err;
1450
1451 /* Convert to bits per second */
1452 rate = entry->police.rate_bytes_ps * 8;
1453 err = cn10k_set_matchall_ipolicer_rate(nic, entry->police.burst, rate);
1454 if (err)
1455 return err;
1456 nic->flags |= OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED;
1457 break;
1458 default:
1459 NL_SET_ERR_MSG_MOD(extack,
1460 "Only police action supported with Ingress MATCHALL offload");
1461 return -EOPNOTSUPP;
1462 }
1463
1464 return 0;
1465 }
1466
otx2_tc_ingress_matchall_delete(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls)1467 static int otx2_tc_ingress_matchall_delete(struct otx2_nic *nic,
1468 struct tc_cls_matchall_offload *cls)
1469 {
1470 struct netlink_ext_ack *extack = cls->common.extack;
1471 int err;
1472
1473 if (nic->flags & OTX2_FLAG_INTF_DOWN) {
1474 NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
1475 return -EINVAL;
1476 }
1477
1478 err = cn10k_free_matchall_ipolicer(nic);
1479 nic->flags &= ~OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED;
1480 return err;
1481 }
1482
otx2_setup_tc_ingress_matchall(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls_matchall)1483 static int otx2_setup_tc_ingress_matchall(struct otx2_nic *nic,
1484 struct tc_cls_matchall_offload *cls_matchall)
1485 {
1486 switch (cls_matchall->command) {
1487 case TC_CLSMATCHALL_REPLACE:
1488 return otx2_tc_ingress_matchall_install(nic, cls_matchall);
1489 case TC_CLSMATCHALL_DESTROY:
1490 return otx2_tc_ingress_matchall_delete(nic, cls_matchall);
1491 case TC_CLSMATCHALL_STATS:
1492 default:
1493 break;
1494 }
1495
1496 return -EOPNOTSUPP;
1497 }
1498
otx2_setup_tc_block_ingress_cb(enum tc_setup_type type,void * type_data,void * cb_priv)1499 static int otx2_setup_tc_block_ingress_cb(enum tc_setup_type type,
1500 void *type_data, void *cb_priv)
1501 {
1502 struct otx2_nic *nic = cb_priv;
1503 bool ntuple;
1504
1505 if (!tc_cls_can_offload_and_chain0(nic->netdev, type_data))
1506 return -EOPNOTSUPP;
1507
1508 ntuple = nic->netdev->features & NETIF_F_NTUPLE;
1509 switch (type) {
1510 case TC_SETUP_CLSFLOWER:
1511 if (ntuple) {
1512 netdev_warn(nic->netdev,
1513 "Can't install TC flower offload rule when NTUPLE is active");
1514 return -EOPNOTSUPP;
1515 }
1516
1517 return otx2_setup_tc_cls_flower(nic, type_data);
1518 case TC_SETUP_CLSMATCHALL:
1519 return otx2_setup_tc_ingress_matchall(nic, type_data);
1520 default:
1521 break;
1522 }
1523
1524 return -EOPNOTSUPP;
1525 }
1526
otx2_setup_tc_egress_matchall(struct otx2_nic * nic,struct tc_cls_matchall_offload * cls_matchall)1527 static int otx2_setup_tc_egress_matchall(struct otx2_nic *nic,
1528 struct tc_cls_matchall_offload *cls_matchall)
1529 {
1530 switch (cls_matchall->command) {
1531 case TC_CLSMATCHALL_REPLACE:
1532 return otx2_tc_egress_matchall_install(nic, cls_matchall);
1533 case TC_CLSMATCHALL_DESTROY:
1534 return otx2_tc_egress_matchall_delete(nic, cls_matchall);
1535 case TC_CLSMATCHALL_STATS:
1536 default:
1537 break;
1538 }
1539
1540 return -EOPNOTSUPP;
1541 }
1542
otx2_setup_tc_block_egress_cb(enum tc_setup_type type,void * type_data,void * cb_priv)1543 static int otx2_setup_tc_block_egress_cb(enum tc_setup_type type,
1544 void *type_data, void *cb_priv)
1545 {
1546 struct otx2_nic *nic = cb_priv;
1547
1548 if (!tc_cls_can_offload_and_chain0(nic->netdev, type_data))
1549 return -EOPNOTSUPP;
1550
1551 switch (type) {
1552 case TC_SETUP_CLSMATCHALL:
1553 return otx2_setup_tc_egress_matchall(nic, type_data);
1554 default:
1555 break;
1556 }
1557
1558 return -EOPNOTSUPP;
1559 }
1560
1561 static LIST_HEAD(otx2_block_cb_list);
1562
otx2_setup_tc_block(struct net_device * netdev,struct flow_block_offload * f)1563 static int otx2_setup_tc_block(struct net_device *netdev,
1564 struct flow_block_offload *f)
1565 {
1566 struct otx2_nic *nic = netdev_priv(netdev);
1567 flow_setup_cb_t *cb;
1568 bool ingress;
1569
1570 if (f->block_shared)
1571 return -EOPNOTSUPP;
1572
1573 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) {
1574 cb = otx2_setup_tc_block_ingress_cb;
1575 ingress = true;
1576 } else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) {
1577 cb = otx2_setup_tc_block_egress_cb;
1578 ingress = false;
1579 } else {
1580 return -EOPNOTSUPP;
1581 }
1582
1583 return flow_block_cb_setup_simple(f, &otx2_block_cb_list, cb,
1584 nic, nic, ingress);
1585 }
1586
otx2_setup_tc(struct net_device * netdev,enum tc_setup_type type,void * type_data)1587 int otx2_setup_tc(struct net_device *netdev, enum tc_setup_type type,
1588 void *type_data)
1589 {
1590 switch (type) {
1591 case TC_SETUP_BLOCK:
1592 return otx2_setup_tc_block(netdev, type_data);
1593 case TC_SETUP_QDISC_HTB:
1594 return otx2_setup_tc_htb(netdev, type_data);
1595 default:
1596 return -EOPNOTSUPP;
1597 }
1598 }
1599 EXPORT_SYMBOL(otx2_setup_tc);
1600
otx2_init_tc(struct otx2_nic * nic)1601 int otx2_init_tc(struct otx2_nic *nic)
1602 {
1603 /* Exclude receive queue 0 being used for police action */
1604 set_bit(0, &nic->rq_bmap);
1605
1606 if (!nic->flow_cfg) {
1607 netdev_err(nic->netdev,
1608 "Can't init TC, nic->flow_cfg is not setup\n");
1609 return -EINVAL;
1610 }
1611
1612 return 0;
1613 }
1614 EXPORT_SYMBOL(otx2_init_tc);
1615
otx2_shutdown_tc(struct otx2_nic * nic)1616 void otx2_shutdown_tc(struct otx2_nic *nic)
1617 {
1618 otx2_destroy_tc_flow_list(nic);
1619 }
1620 EXPORT_SYMBOL(otx2_shutdown_tc);
1621
otx2_tc_config_ingress_rule(struct otx2_nic * nic,struct otx2_tc_flow * node)1622 static void otx2_tc_config_ingress_rule(struct otx2_nic *nic,
1623 struct otx2_tc_flow *node)
1624 {
1625 struct npc_install_flow_req *req;
1626
1627 if (otx2_tc_act_set_hw_police(nic, node))
1628 return;
1629
1630 mutex_lock(&nic->mbox.lock);
1631
1632 req = otx2_mbox_alloc_msg_npc_install_flow(&nic->mbox);
1633 if (!req)
1634 goto err;
1635
1636 memcpy(req, &node->req, sizeof(struct npc_install_flow_req));
1637
1638 if (otx2_sync_mbox_msg(&nic->mbox))
1639 netdev_err(nic->netdev,
1640 "Failed to install MCAM flow entry for ingress rule");
1641 err:
1642 mutex_unlock(&nic->mbox.lock);
1643 }
1644
otx2_tc_apply_ingress_police_rules(struct otx2_nic * nic)1645 void otx2_tc_apply_ingress_police_rules(struct otx2_nic *nic)
1646 {
1647 struct otx2_flow_config *flow_cfg = nic->flow_cfg;
1648 struct otx2_tc_flow *node;
1649
1650 /* If any ingress policer rules exist for the interface then
1651 * apply those rules. Ingress policer rules depend on bandwidth
1652 * profiles linked to the receive queues. Since no receive queues
1653 * exist when interface is down, ingress policer rules are stored
1654 * and configured in hardware after all receive queues are allocated
1655 * in otx2_open.
1656 */
1657 list_for_each_entry(node, &flow_cfg->flow_list_tc, list) {
1658 if (node->is_act_police)
1659 otx2_tc_config_ingress_rule(nic, node);
1660 }
1661 }
1662 EXPORT_SYMBOL(otx2_tc_apply_ingress_police_rules);
1663