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