1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2015-2017 Intel Deutschland GmbH
9 * Copyright (C) 2018-2024 Intel Corporation
10 *
11 * utilities for mac80211
12 */
13
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
27 #include <kunit/visibility.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wme.h"
34 #include "led.h"
35 #include "wep.h"
36
37 /* privid for wiphys to determine whether they belong to us or not */
38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39
wiphy_to_ieee80211_hw(struct wiphy * wiphy)40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 {
42 struct ieee80211_local *local;
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46 }
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49 const struct ieee80211_conn_settings ieee80211_conn_settings_unlimited = {
50 .mode = IEEE80211_CONN_MODE_EHT,
51 .bw_limit = IEEE80211_CONN_BW_LIMIT_320,
52 };
53
ieee80211_get_bssid(struct ieee80211_hdr * hdr,size_t len,enum nl80211_iftype type)54 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
55 enum nl80211_iftype type)
56 {
57 __le16 fc = hdr->frame_control;
58
59 if (ieee80211_is_data(fc)) {
60 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
62
63 if (ieee80211_has_a4(fc))
64 return NULL;
65 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
68 return hdr->addr2;
69
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_s1g_beacon(fc)) {
74 struct ieee80211_ext *ext = (void *) hdr;
75
76 return ext->u.s1g_beacon.sa;
77 }
78
79 if (ieee80211_is_mgmt(fc)) {
80 if (len < 24) /* drop incorrect hdr len (mgmt) */
81 return NULL;
82 return hdr->addr3;
83 }
84
85 if (ieee80211_is_ctl(fc)) {
86 if (ieee80211_is_pspoll(fc))
87 return hdr->addr1;
88
89 if (ieee80211_is_back_req(fc)) {
90 switch (type) {
91 case NL80211_IFTYPE_STATION:
92 return hdr->addr2;
93 case NL80211_IFTYPE_AP:
94 case NL80211_IFTYPE_AP_VLAN:
95 return hdr->addr1;
96 default:
97 break; /* fall through to the return */
98 }
99 }
100 }
101
102 return NULL;
103 }
104 EXPORT_SYMBOL(ieee80211_get_bssid);
105
ieee80211_tx_set_protected(struct ieee80211_tx_data * tx)106 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
107 {
108 struct sk_buff *skb;
109 struct ieee80211_hdr *hdr;
110
111 skb_queue_walk(&tx->skbs, skb) {
112 hdr = (struct ieee80211_hdr *) skb->data;
113 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
114 }
115 }
116
ieee80211_frame_duration(enum nl80211_band band,size_t len,int rate,int erp,int short_preamble)117 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
118 int rate, int erp, int short_preamble)
119 {
120 int dur;
121
122 /* calculate duration (in microseconds, rounded up to next higher
123 * integer if it includes a fractional microsecond) to send frame of
124 * len bytes (does not include FCS) at the given rate. Duration will
125 * also include SIFS.
126 *
127 * rate is in 100 kbps, so divident is multiplied by 10 in the
128 * DIV_ROUND_UP() operations.
129 */
130
131 if (band == NL80211_BAND_5GHZ || erp) {
132 /*
133 * OFDM:
134 *
135 * N_DBPS = DATARATE x 4
136 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
137 * (16 = SIGNAL time, 6 = tail bits)
138 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
139 *
140 * T_SYM = 4 usec
141 * 802.11a - 18.5.2: aSIFSTime = 16 usec
142 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
143 * signal ext = 6 usec
144 */
145 dur = 16; /* SIFS + signal ext */
146 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
147 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
148
149 /* rates should already consider the channel bandwidth,
150 * don't apply divisor again.
151 */
152 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
153 4 * rate); /* T_SYM x N_SYM */
154 } else {
155 /*
156 * 802.11b or 802.11g with 802.11b compatibility:
157 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
158 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
159 *
160 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
161 * aSIFSTime = 10 usec
162 * aPreambleLength = 144 usec or 72 usec with short preamble
163 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
164 */
165 dur = 10; /* aSIFSTime = 10 usec */
166 dur += short_preamble ? (72 + 24) : (144 + 48);
167
168 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
169 }
170
171 return dur;
172 }
173
174 /* Exported duration function for driver use */
ieee80211_generic_frame_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_band band,size_t frame_len,struct ieee80211_rate * rate)175 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
176 struct ieee80211_vif *vif,
177 enum nl80211_band band,
178 size_t frame_len,
179 struct ieee80211_rate *rate)
180 {
181 struct ieee80211_sub_if_data *sdata;
182 u16 dur;
183 int erp;
184 bool short_preamble = false;
185
186 erp = 0;
187 if (vif) {
188 sdata = vif_to_sdata(vif);
189 short_preamble = sdata->vif.bss_conf.use_short_preamble;
190 if (sdata->deflink.operating_11g_mode)
191 erp = rate->flags & IEEE80211_RATE_ERP_G;
192 }
193
194 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
195 short_preamble);
196
197 return cpu_to_le16(dur);
198 }
199 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
200
ieee80211_rts_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,size_t frame_len,const struct ieee80211_tx_info * frame_txctl)201 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif, size_t frame_len,
203 const struct ieee80211_tx_info *frame_txctl)
204 {
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
208 bool short_preamble;
209 int erp, bitrate;
210 u16 dur;
211 struct ieee80211_supported_band *sband;
212
213 sband = local->hw.wiphy->bands[frame_txctl->band];
214
215 short_preamble = false;
216
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
218
219 erp = 0;
220 if (vif) {
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->deflink.operating_11g_mode)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 }
226
227 bitrate = rate->bitrate;
228
229 /* CTS duration */
230 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
231 erp, short_preamble);
232 /* Data frame duration */
233 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
234 erp, short_preamble);
235 /* ACK duration */
236 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
237 erp, short_preamble);
238
239 return cpu_to_le16(dur);
240 }
241 EXPORT_SYMBOL(ieee80211_rts_duration);
242
ieee80211_ctstoself_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,size_t frame_len,const struct ieee80211_tx_info * frame_txctl)243 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
244 struct ieee80211_vif *vif,
245 size_t frame_len,
246 const struct ieee80211_tx_info *frame_txctl)
247 {
248 struct ieee80211_local *local = hw_to_local(hw);
249 struct ieee80211_rate *rate;
250 struct ieee80211_sub_if_data *sdata;
251 bool short_preamble;
252 int erp, bitrate;
253 u16 dur;
254 struct ieee80211_supported_band *sband;
255
256 sband = local->hw.wiphy->bands[frame_txctl->band];
257
258 short_preamble = false;
259
260 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
261 erp = 0;
262 if (vif) {
263 sdata = vif_to_sdata(vif);
264 short_preamble = sdata->vif.bss_conf.use_short_preamble;
265 if (sdata->deflink.operating_11g_mode)
266 erp = rate->flags & IEEE80211_RATE_ERP_G;
267 }
268
269 bitrate = rate->bitrate;
270
271 /* Data frame duration */
272 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
273 erp, short_preamble);
274 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
275 /* ACK duration */
276 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
277 erp, short_preamble);
278 }
279
280 return cpu_to_le16(dur);
281 }
282 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
283
wake_tx_push_queue(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct ieee80211_txq * queue)284 static void wake_tx_push_queue(struct ieee80211_local *local,
285 struct ieee80211_sub_if_data *sdata,
286 struct ieee80211_txq *queue)
287 {
288 struct ieee80211_tx_control control = {
289 .sta = queue->sta,
290 };
291 struct sk_buff *skb;
292
293 while (1) {
294 skb = ieee80211_tx_dequeue(&local->hw, queue);
295 if (!skb)
296 break;
297
298 drv_tx(local, &control, skb);
299 }
300 }
301
302 /* wake_tx_queue handler for driver not implementing a custom one*/
ieee80211_handle_wake_tx_queue(struct ieee80211_hw * hw,struct ieee80211_txq * txq)303 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
304 struct ieee80211_txq *txq)
305 {
306 struct ieee80211_local *local = hw_to_local(hw);
307 struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
308 struct ieee80211_txq *queue;
309
310 spin_lock(&local->handle_wake_tx_queue_lock);
311
312 /* Use ieee80211_next_txq() for airtime fairness accounting */
313 ieee80211_txq_schedule_start(hw, txq->ac);
314 while ((queue = ieee80211_next_txq(hw, txq->ac))) {
315 wake_tx_push_queue(local, sdata, queue);
316 ieee80211_return_txq(hw, queue, false);
317 }
318 ieee80211_txq_schedule_end(hw, txq->ac);
319 spin_unlock(&local->handle_wake_tx_queue_lock);
320 }
321 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue);
322
__ieee80211_wake_txqs(struct ieee80211_sub_if_data * sdata,int ac)323 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
324 {
325 struct ieee80211_local *local = sdata->local;
326 struct ieee80211_vif *vif = &sdata->vif;
327 struct fq *fq = &local->fq;
328 struct ps_data *ps = NULL;
329 struct txq_info *txqi;
330 struct sta_info *sta;
331 int i;
332
333 local_bh_disable();
334 spin_lock(&fq->lock);
335
336 if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
337 goto out;
338
339 if (sdata->vif.type == NL80211_IFTYPE_AP)
340 ps = &sdata->bss->ps;
341
342 list_for_each_entry_rcu(sta, &local->sta_list, list) {
343 if (sdata != sta->sdata)
344 continue;
345
346 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
347 struct ieee80211_txq *txq = sta->sta.txq[i];
348
349 if (!txq)
350 continue;
351
352 txqi = to_txq_info(txq);
353
354 if (ac != txq->ac)
355 continue;
356
357 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY,
358 &txqi->flags))
359 continue;
360
361 spin_unlock(&fq->lock);
362 drv_wake_tx_queue(local, txqi);
363 spin_lock(&fq->lock);
364 }
365 }
366
367 if (!vif->txq)
368 goto out;
369
370 txqi = to_txq_info(vif->txq);
371
372 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) ||
373 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
374 goto out;
375
376 spin_unlock(&fq->lock);
377
378 drv_wake_tx_queue(local, txqi);
379 local_bh_enable();
380 return;
381 out:
382 spin_unlock(&fq->lock);
383 local_bh_enable();
384 }
385
386 static void
387 __releases(&local->queue_stop_reason_lock)
388 __acquires(&local->queue_stop_reason_lock)
_ieee80211_wake_txqs(struct ieee80211_local * local,unsigned long * flags)389 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
390 {
391 struct ieee80211_sub_if_data *sdata;
392 int n_acs = IEEE80211_NUM_ACS;
393 int i;
394
395 rcu_read_lock();
396
397 if (local->hw.queues < IEEE80211_NUM_ACS)
398 n_acs = 1;
399
400 for (i = 0; i < local->hw.queues; i++) {
401 if (local->queue_stop_reasons[i])
402 continue;
403
404 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
405 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
406 int ac;
407
408 for (ac = 0; ac < n_acs; ac++) {
409 int ac_queue = sdata->vif.hw_queue[ac];
410
411 if (ac_queue == i ||
412 sdata->vif.cab_queue == i)
413 __ieee80211_wake_txqs(sdata, ac);
414 }
415 }
416 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
417 }
418
419 rcu_read_unlock();
420 }
421
ieee80211_wake_txqs(struct tasklet_struct * t)422 void ieee80211_wake_txqs(struct tasklet_struct *t)
423 {
424 struct ieee80211_local *local = from_tasklet(local, t,
425 wake_txqs_tasklet);
426 unsigned long flags;
427
428 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
429 _ieee80211_wake_txqs(local, &flags);
430 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
431 }
432
__ieee80211_wake_queue(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted,unsigned long * flags)433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
434 enum queue_stop_reason reason,
435 bool refcounted,
436 unsigned long *flags)
437 {
438 struct ieee80211_local *local = hw_to_local(hw);
439
440 trace_wake_queue(local, queue, reason);
441
442 if (WARN_ON(queue >= hw->queues))
443 return;
444
445 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
446 return;
447
448 if (!refcounted) {
449 local->q_stop_reasons[queue][reason] = 0;
450 } else {
451 local->q_stop_reasons[queue][reason]--;
452 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
453 local->q_stop_reasons[queue][reason] = 0;
454 }
455
456 if (local->q_stop_reasons[queue][reason] == 0)
457 __clear_bit(reason, &local->queue_stop_reasons[queue]);
458
459 if (local->queue_stop_reasons[queue] != 0)
460 /* someone still has this queue stopped */
461 return;
462
463 if (!skb_queue_empty(&local->pending[queue]))
464 tasklet_schedule(&local->tx_pending_tasklet);
465
466 /*
467 * Calling _ieee80211_wake_txqs here can be a problem because it may
468 * release queue_stop_reason_lock which has been taken by
469 * __ieee80211_wake_queue's caller. It is certainly not very nice to
470 * release someone's lock, but it is fine because all the callers of
471 * __ieee80211_wake_queue call it right before releasing the lock.
472 */
473 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
474 tasklet_schedule(&local->wake_txqs_tasklet);
475 else
476 _ieee80211_wake_txqs(local, flags);
477 }
478
ieee80211_wake_queue_by_reason(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)479 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
480 enum queue_stop_reason reason,
481 bool refcounted)
482 {
483 struct ieee80211_local *local = hw_to_local(hw);
484 unsigned long flags;
485
486 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 }
490
ieee80211_wake_queue(struct ieee80211_hw * hw,int queue)491 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
492 {
493 ieee80211_wake_queue_by_reason(hw, queue,
494 IEEE80211_QUEUE_STOP_REASON_DRIVER,
495 false);
496 }
497 EXPORT_SYMBOL(ieee80211_wake_queue);
498
__ieee80211_stop_queue(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)499 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
500 enum queue_stop_reason reason,
501 bool refcounted)
502 {
503 struct ieee80211_local *local = hw_to_local(hw);
504
505 trace_stop_queue(local, queue, reason);
506
507 if (WARN_ON(queue >= hw->queues))
508 return;
509
510 if (!refcounted)
511 local->q_stop_reasons[queue][reason] = 1;
512 else
513 local->q_stop_reasons[queue][reason]++;
514
515 set_bit(reason, &local->queue_stop_reasons[queue]);
516 }
517
ieee80211_stop_queue_by_reason(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)518 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
519 enum queue_stop_reason reason,
520 bool refcounted)
521 {
522 struct ieee80211_local *local = hw_to_local(hw);
523 unsigned long flags;
524
525 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
526 __ieee80211_stop_queue(hw, queue, reason, refcounted);
527 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
528 }
529
ieee80211_stop_queue(struct ieee80211_hw * hw,int queue)530 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
531 {
532 ieee80211_stop_queue_by_reason(hw, queue,
533 IEEE80211_QUEUE_STOP_REASON_DRIVER,
534 false);
535 }
536 EXPORT_SYMBOL(ieee80211_stop_queue);
537
ieee80211_add_pending_skb(struct ieee80211_local * local,struct sk_buff * skb)538 void ieee80211_add_pending_skb(struct ieee80211_local *local,
539 struct sk_buff *skb)
540 {
541 struct ieee80211_hw *hw = &local->hw;
542 unsigned long flags;
543 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
544 int queue = info->hw_queue;
545
546 if (WARN_ON(!info->control.vif)) {
547 ieee80211_free_txskb(&local->hw, skb);
548 return;
549 }
550
551 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
552 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
553 false);
554 __skb_queue_tail(&local->pending[queue], skb);
555 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
556 false, &flags);
557 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
558 }
559
ieee80211_add_pending_skbs(struct ieee80211_local * local,struct sk_buff_head * skbs)560 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
561 struct sk_buff_head *skbs)
562 {
563 struct ieee80211_hw *hw = &local->hw;
564 struct sk_buff *skb;
565 unsigned long flags;
566 int queue, i;
567
568 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
569 while ((skb = skb_dequeue(skbs))) {
570 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
571
572 if (WARN_ON(!info->control.vif)) {
573 ieee80211_free_txskb(&local->hw, skb);
574 continue;
575 }
576
577 queue = info->hw_queue;
578
579 __ieee80211_stop_queue(hw, queue,
580 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
581 false);
582
583 __skb_queue_tail(&local->pending[queue], skb);
584 }
585
586 for (i = 0; i < hw->queues; i++)
587 __ieee80211_wake_queue(hw, i,
588 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
589 false, &flags);
590 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
591 }
592
ieee80211_stop_queues_by_reason(struct ieee80211_hw * hw,unsigned long queues,enum queue_stop_reason reason,bool refcounted)593 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
594 unsigned long queues,
595 enum queue_stop_reason reason,
596 bool refcounted)
597 {
598 struct ieee80211_local *local = hw_to_local(hw);
599 unsigned long flags;
600 int i;
601
602 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
603
604 for_each_set_bit(i, &queues, hw->queues)
605 __ieee80211_stop_queue(hw, i, reason, refcounted);
606
607 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
608 }
609
ieee80211_stop_queues(struct ieee80211_hw * hw)610 void ieee80211_stop_queues(struct ieee80211_hw *hw)
611 {
612 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
613 IEEE80211_QUEUE_STOP_REASON_DRIVER,
614 false);
615 }
616 EXPORT_SYMBOL(ieee80211_stop_queues);
617
ieee80211_queue_stopped(struct ieee80211_hw * hw,int queue)618 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
619 {
620 struct ieee80211_local *local = hw_to_local(hw);
621 unsigned long flags;
622 int ret;
623
624 if (WARN_ON(queue >= hw->queues))
625 return true;
626
627 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
628 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
629 &local->queue_stop_reasons[queue]);
630 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
631 return ret;
632 }
633 EXPORT_SYMBOL(ieee80211_queue_stopped);
634
ieee80211_wake_queues_by_reason(struct ieee80211_hw * hw,unsigned long queues,enum queue_stop_reason reason,bool refcounted)635 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
636 unsigned long queues,
637 enum queue_stop_reason reason,
638 bool refcounted)
639 {
640 struct ieee80211_local *local = hw_to_local(hw);
641 unsigned long flags;
642 int i;
643
644 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
645
646 for_each_set_bit(i, &queues, hw->queues)
647 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
648
649 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
650 }
651
ieee80211_wake_queues(struct ieee80211_hw * hw)652 void ieee80211_wake_queues(struct ieee80211_hw *hw)
653 {
654 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
655 IEEE80211_QUEUE_STOP_REASON_DRIVER,
656 false);
657 }
658 EXPORT_SYMBOL(ieee80211_wake_queues);
659
660 static unsigned int
ieee80211_get_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)661 ieee80211_get_vif_queues(struct ieee80211_local *local,
662 struct ieee80211_sub_if_data *sdata)
663 {
664 unsigned int queues;
665
666 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
667 int ac;
668
669 queues = 0;
670
671 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
672 queues |= BIT(sdata->vif.hw_queue[ac]);
673 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
674 queues |= BIT(sdata->vif.cab_queue);
675 } else {
676 /* all queues */
677 queues = BIT(local->hw.queues) - 1;
678 }
679
680 return queues;
681 }
682
__ieee80211_flush_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,unsigned int queues,bool drop)683 void __ieee80211_flush_queues(struct ieee80211_local *local,
684 struct ieee80211_sub_if_data *sdata,
685 unsigned int queues, bool drop)
686 {
687 if (!local->ops->flush)
688 return;
689
690 /*
691 * If no queue was set, or if the HW doesn't support
692 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
693 */
694 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
695 queues = ieee80211_get_vif_queues(local, sdata);
696
697 ieee80211_stop_queues_by_reason(&local->hw, queues,
698 IEEE80211_QUEUE_STOP_REASON_FLUSH,
699 false);
700
701 if (drop) {
702 struct sta_info *sta;
703
704 /* Purge the queues, so the frames on them won't be
705 * sent during __ieee80211_wake_queue()
706 */
707 list_for_each_entry(sta, &local->sta_list, list) {
708 if (sdata != sta->sdata)
709 continue;
710 ieee80211_purge_sta_txqs(sta);
711 }
712 }
713
714 drv_flush(local, sdata, queues, drop);
715
716 ieee80211_wake_queues_by_reason(&local->hw, queues,
717 IEEE80211_QUEUE_STOP_REASON_FLUSH,
718 false);
719 }
720
ieee80211_flush_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,bool drop)721 void ieee80211_flush_queues(struct ieee80211_local *local,
722 struct ieee80211_sub_if_data *sdata, bool drop)
723 {
724 __ieee80211_flush_queues(local, sdata, 0, drop);
725 }
726
ieee80211_stop_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,enum queue_stop_reason reason)727 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
728 struct ieee80211_sub_if_data *sdata,
729 enum queue_stop_reason reason)
730 {
731 ieee80211_stop_queues_by_reason(&local->hw,
732 ieee80211_get_vif_queues(local, sdata),
733 reason, true);
734 }
735
ieee80211_wake_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,enum queue_stop_reason reason)736 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
737 struct ieee80211_sub_if_data *sdata,
738 enum queue_stop_reason reason)
739 {
740 ieee80211_wake_queues_by_reason(&local->hw,
741 ieee80211_get_vif_queues(local, sdata),
742 reason, true);
743 }
744
__iterate_interfaces(struct ieee80211_local * local,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)745 static void __iterate_interfaces(struct ieee80211_local *local,
746 u32 iter_flags,
747 void (*iterator)(void *data, u8 *mac,
748 struct ieee80211_vif *vif),
749 void *data)
750 {
751 struct ieee80211_sub_if_data *sdata;
752 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
753
754 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
755 switch (sdata->vif.type) {
756 case NL80211_IFTYPE_MONITOR:
757 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
758 continue;
759 break;
760 case NL80211_IFTYPE_AP_VLAN:
761 continue;
762 default:
763 break;
764 }
765 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
766 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
767 continue;
768 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
769 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
770 continue;
771 if (ieee80211_sdata_running(sdata) || !active_only)
772 iterator(data, sdata->vif.addr,
773 &sdata->vif);
774 }
775
776 sdata = rcu_dereference_check(local->monitor_sdata,
777 lockdep_is_held(&local->iflist_mtx) ||
778 lockdep_is_held(&local->hw.wiphy->mtx));
779 if (sdata &&
780 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
781 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
782 iterator(data, sdata->vif.addr, &sdata->vif);
783 }
784
ieee80211_iterate_interfaces(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)785 void ieee80211_iterate_interfaces(
786 struct ieee80211_hw *hw, u32 iter_flags,
787 void (*iterator)(void *data, u8 *mac,
788 struct ieee80211_vif *vif),
789 void *data)
790 {
791 struct ieee80211_local *local = hw_to_local(hw);
792
793 mutex_lock(&local->iflist_mtx);
794 __iterate_interfaces(local, iter_flags, iterator, data);
795 mutex_unlock(&local->iflist_mtx);
796 }
797 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
798
ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)799 void ieee80211_iterate_active_interfaces_atomic(
800 struct ieee80211_hw *hw, u32 iter_flags,
801 void (*iterator)(void *data, u8 *mac,
802 struct ieee80211_vif *vif),
803 void *data)
804 {
805 struct ieee80211_local *local = hw_to_local(hw);
806
807 rcu_read_lock();
808 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
809 iterator, data);
810 rcu_read_unlock();
811 }
812 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
813
ieee80211_iterate_active_interfaces_mtx(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)814 void ieee80211_iterate_active_interfaces_mtx(
815 struct ieee80211_hw *hw, u32 iter_flags,
816 void (*iterator)(void *data, u8 *mac,
817 struct ieee80211_vif *vif),
818 void *data)
819 {
820 struct ieee80211_local *local = hw_to_local(hw);
821
822 lockdep_assert_wiphy(hw->wiphy);
823
824 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
825 iterator, data);
826 }
827 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
828
__iterate_stations(struct ieee80211_local * local,void (* iterator)(void * data,struct ieee80211_sta * sta),void * data)829 static void __iterate_stations(struct ieee80211_local *local,
830 void (*iterator)(void *data,
831 struct ieee80211_sta *sta),
832 void *data)
833 {
834 struct sta_info *sta;
835
836 list_for_each_entry_rcu(sta, &local->sta_list, list) {
837 if (!sta->uploaded)
838 continue;
839
840 iterator(data, &sta->sta);
841 }
842 }
843
ieee80211_iterate_stations_atomic(struct ieee80211_hw * hw,void (* iterator)(void * data,struct ieee80211_sta * sta),void * data)844 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
845 void (*iterator)(void *data,
846 struct ieee80211_sta *sta),
847 void *data)
848 {
849 struct ieee80211_local *local = hw_to_local(hw);
850
851 rcu_read_lock();
852 __iterate_stations(local, iterator, data);
853 rcu_read_unlock();
854 }
855 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
856
wdev_to_ieee80211_vif(struct wireless_dev * wdev)857 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
858 {
859 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
860
861 if (!ieee80211_sdata_running(sdata) ||
862 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
863 return NULL;
864 return &sdata->vif;
865 }
866 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
867
ieee80211_vif_to_wdev(struct ieee80211_vif * vif)868 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
869 {
870 if (!vif)
871 return NULL;
872
873 return &vif_to_sdata(vif)->wdev;
874 }
875 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
876
877 /*
878 * Nothing should have been stuffed into the workqueue during
879 * the suspend->resume cycle. Since we can't check each caller
880 * of this function if we are already quiescing / suspended,
881 * check here and don't WARN since this can actually happen when
882 * the rx path (for example) is racing against __ieee80211_suspend
883 * and suspending / quiescing was set after the rx path checked
884 * them.
885 */
ieee80211_can_queue_work(struct ieee80211_local * local)886 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
887 {
888 if (local->quiescing || (local->suspended && !local->resuming)) {
889 pr_warn("queueing ieee80211 work while going to suspend\n");
890 return false;
891 }
892
893 return true;
894 }
895
ieee80211_queue_work(struct ieee80211_hw * hw,struct work_struct * work)896 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
897 {
898 struct ieee80211_local *local = hw_to_local(hw);
899
900 if (!ieee80211_can_queue_work(local))
901 return;
902
903 queue_work(local->workqueue, work);
904 }
905 EXPORT_SYMBOL(ieee80211_queue_work);
906
ieee80211_queue_delayed_work(struct ieee80211_hw * hw,struct delayed_work * dwork,unsigned long delay)907 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
908 struct delayed_work *dwork,
909 unsigned long delay)
910 {
911 struct ieee80211_local *local = hw_to_local(hw);
912
913 if (!ieee80211_can_queue_work(local))
914 return;
915
916 queue_delayed_work(local->workqueue, dwork, delay);
917 }
918 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
919
ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data * sdata,struct ieee80211_tx_queue_params * qparam,int ac)920 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
921 struct ieee80211_tx_queue_params
922 *qparam, int ac)
923 {
924 struct ieee80211_chanctx_conf *chanctx_conf;
925 const struct ieee80211_reg_rule *rrule;
926 const struct ieee80211_wmm_ac *wmm_ac;
927 u16 center_freq = 0;
928
929 if (sdata->vif.type != NL80211_IFTYPE_AP &&
930 sdata->vif.type != NL80211_IFTYPE_STATION)
931 return;
932
933 rcu_read_lock();
934 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
935 if (chanctx_conf)
936 center_freq = chanctx_conf->def.chan->center_freq;
937
938 if (!center_freq) {
939 rcu_read_unlock();
940 return;
941 }
942
943 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
944
945 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
946 rcu_read_unlock();
947 return;
948 }
949
950 if (sdata->vif.type == NL80211_IFTYPE_AP)
951 wmm_ac = &rrule->wmm_rule.ap[ac];
952 else
953 wmm_ac = &rrule->wmm_rule.client[ac];
954 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
955 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
956 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
957 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
958 rcu_read_unlock();
959 }
960
ieee80211_set_wmm_default(struct ieee80211_link_data * link,bool bss_notify,bool enable_qos)961 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
962 bool bss_notify, bool enable_qos)
963 {
964 struct ieee80211_sub_if_data *sdata = link->sdata;
965 struct ieee80211_local *local = sdata->local;
966 struct ieee80211_tx_queue_params qparam;
967 struct ieee80211_chanctx_conf *chanctx_conf;
968 int ac;
969 bool use_11b;
970 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
971 int aCWmin, aCWmax;
972
973 if (!local->ops->conf_tx)
974 return;
975
976 if (local->hw.queues < IEEE80211_NUM_ACS)
977 return;
978
979 memset(&qparam, 0, sizeof(qparam));
980
981 rcu_read_lock();
982 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
983 use_11b = (chanctx_conf &&
984 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
985 !link->operating_11g_mode;
986 rcu_read_unlock();
987
988 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
989
990 /* Set defaults according to 802.11-2007 Table 7-37 */
991 aCWmax = 1023;
992 if (use_11b)
993 aCWmin = 31;
994 else
995 aCWmin = 15;
996
997 /* Confiure old 802.11b/g medium access rules. */
998 qparam.cw_max = aCWmax;
999 qparam.cw_min = aCWmin;
1000 qparam.txop = 0;
1001 qparam.aifs = 2;
1002
1003 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1004 /* Update if QoS is enabled. */
1005 if (enable_qos) {
1006 switch (ac) {
1007 case IEEE80211_AC_BK:
1008 qparam.cw_max = aCWmax;
1009 qparam.cw_min = aCWmin;
1010 qparam.txop = 0;
1011 if (is_ocb)
1012 qparam.aifs = 9;
1013 else
1014 qparam.aifs = 7;
1015 break;
1016 /* never happens but let's not leave undefined */
1017 default:
1018 case IEEE80211_AC_BE:
1019 qparam.cw_max = aCWmax;
1020 qparam.cw_min = aCWmin;
1021 qparam.txop = 0;
1022 if (is_ocb)
1023 qparam.aifs = 6;
1024 else
1025 qparam.aifs = 3;
1026 break;
1027 case IEEE80211_AC_VI:
1028 qparam.cw_max = aCWmin;
1029 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1030 if (is_ocb)
1031 qparam.txop = 0;
1032 else if (use_11b)
1033 qparam.txop = 6016/32;
1034 else
1035 qparam.txop = 3008/32;
1036
1037 if (is_ocb)
1038 qparam.aifs = 3;
1039 else
1040 qparam.aifs = 2;
1041 break;
1042 case IEEE80211_AC_VO:
1043 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1044 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1045 if (is_ocb)
1046 qparam.txop = 0;
1047 else if (use_11b)
1048 qparam.txop = 3264/32;
1049 else
1050 qparam.txop = 1504/32;
1051 qparam.aifs = 2;
1052 break;
1053 }
1054 }
1055 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1056
1057 qparam.uapsd = false;
1058
1059 link->tx_conf[ac] = qparam;
1060 drv_conf_tx(local, link, ac, &qparam);
1061 }
1062
1063 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1064 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1065 sdata->vif.type != NL80211_IFTYPE_NAN) {
1066 link->conf->qos = enable_qos;
1067 if (bss_notify)
1068 ieee80211_link_info_change_notify(sdata, link,
1069 BSS_CHANGED_QOS);
1070 }
1071 }
1072
ieee80211_send_auth(struct ieee80211_sub_if_data * sdata,u16 transaction,u16 auth_alg,u16 status,const u8 * extra,size_t extra_len,const u8 * da,const u8 * bssid,const u8 * key,u8 key_len,u8 key_idx,u32 tx_flags)1073 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1074 u16 transaction, u16 auth_alg, u16 status,
1075 const u8 *extra, size_t extra_len, const u8 *da,
1076 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1077 u32 tx_flags)
1078 {
1079 struct ieee80211_local *local = sdata->local;
1080 struct sk_buff *skb;
1081 struct ieee80211_mgmt *mgmt;
1082 bool multi_link = ieee80211_vif_is_mld(&sdata->vif);
1083 struct {
1084 u8 id;
1085 u8 len;
1086 u8 ext_id;
1087 struct ieee80211_multi_link_elem ml;
1088 struct ieee80211_mle_basic_common_info basic;
1089 } __packed mle = {
1090 .id = WLAN_EID_EXTENSION,
1091 .len = sizeof(mle) - 2,
1092 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1093 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1094 .basic.len = sizeof(mle.basic),
1095 };
1096 int err;
1097
1098 memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1099
1100 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1101 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1102 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1103 multi_link * sizeof(mle));
1104 if (!skb)
1105 return;
1106
1107 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1108
1109 mgmt = skb_put_zero(skb, 24 + 6);
1110 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1111 IEEE80211_STYPE_AUTH);
1112 memcpy(mgmt->da, da, ETH_ALEN);
1113 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1114 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1115 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1116 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1117 mgmt->u.auth.status_code = cpu_to_le16(status);
1118 if (extra)
1119 skb_put_data(skb, extra, extra_len);
1120 if (multi_link)
1121 skb_put_data(skb, &mle, sizeof(mle));
1122
1123 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1124 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1125 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1126 if (WARN_ON(err)) {
1127 kfree_skb(skb);
1128 return;
1129 }
1130 }
1131
1132 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1133 tx_flags;
1134 ieee80211_tx_skb(sdata, skb);
1135 }
1136
ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data * sdata,const u8 * da,const u8 * bssid,u16 stype,u16 reason,bool send_frame,u8 * frame_buf)1137 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1138 const u8 *da, const u8 *bssid,
1139 u16 stype, u16 reason,
1140 bool send_frame, u8 *frame_buf)
1141 {
1142 struct ieee80211_local *local = sdata->local;
1143 struct sk_buff *skb;
1144 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1145
1146 /* build frame */
1147 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1148 mgmt->duration = 0; /* initialize only */
1149 mgmt->seq_ctrl = 0; /* initialize only */
1150 memcpy(mgmt->da, da, ETH_ALEN);
1151 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1152 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1153 /* u.deauth.reason_code == u.disassoc.reason_code */
1154 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1155
1156 if (send_frame) {
1157 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1158 IEEE80211_DEAUTH_FRAME_LEN);
1159 if (!skb)
1160 return;
1161
1162 skb_reserve(skb, local->hw.extra_tx_headroom);
1163
1164 /* copy in frame */
1165 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1166
1167 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1168 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1169 IEEE80211_SKB_CB(skb)->flags |=
1170 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1171
1172 ieee80211_tx_skb(sdata, skb);
1173 }
1174 }
1175
ieee80211_put_s1g_cap(struct sk_buff * skb,struct ieee80211_sta_s1g_cap * s1g_cap)1176 static int ieee80211_put_s1g_cap(struct sk_buff *skb,
1177 struct ieee80211_sta_s1g_cap *s1g_cap)
1178 {
1179 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_s1g_cap))
1180 return -ENOBUFS;
1181
1182 skb_put_u8(skb, WLAN_EID_S1G_CAPABILITIES);
1183 skb_put_u8(skb, sizeof(struct ieee80211_s1g_cap));
1184
1185 skb_put_data(skb, &s1g_cap->cap, sizeof(s1g_cap->cap));
1186 skb_put_data(skb, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs));
1187
1188 return 0;
1189 }
1190
ieee80211_put_preq_ies_band(struct sk_buff * skb,struct ieee80211_sub_if_data * sdata,const u8 * ie,size_t ie_len,size_t * offset,enum nl80211_band band,u32 rate_mask,struct cfg80211_chan_def * chandef,u32 flags)1191 static int ieee80211_put_preq_ies_band(struct sk_buff *skb,
1192 struct ieee80211_sub_if_data *sdata,
1193 const u8 *ie, size_t ie_len,
1194 size_t *offset,
1195 enum nl80211_band band,
1196 u32 rate_mask,
1197 struct cfg80211_chan_def *chandef,
1198 u32 flags)
1199 {
1200 struct ieee80211_local *local = sdata->local;
1201 struct ieee80211_supported_band *sband;
1202 int i, err;
1203 size_t noffset;
1204 u32 rate_flags;
1205 bool have_80mhz = false;
1206
1207 *offset = 0;
1208
1209 sband = local->hw.wiphy->bands[band];
1210 if (WARN_ON_ONCE(!sband))
1211 return 0;
1212
1213 rate_flags = ieee80211_chandef_rate_flags(chandef);
1214
1215 /* For direct scan add S1G IE and consider its override bits */
1216 if (band == NL80211_BAND_S1GHZ)
1217 return ieee80211_put_s1g_cap(skb, &sband->s1g_cap);
1218
1219 err = ieee80211_put_srates_elem(skb, sband, 0, rate_flags,
1220 ~rate_mask, WLAN_EID_SUPP_RATES);
1221 if (err)
1222 return err;
1223
1224 /* insert "request information" if in custom IEs */
1225 if (ie && ie_len) {
1226 static const u8 before_extrates[] = {
1227 WLAN_EID_SSID,
1228 WLAN_EID_SUPP_RATES,
1229 WLAN_EID_REQUEST,
1230 };
1231 noffset = ieee80211_ie_split(ie, ie_len,
1232 before_extrates,
1233 ARRAY_SIZE(before_extrates),
1234 *offset);
1235 if (skb_tailroom(skb) < noffset - *offset)
1236 return -ENOBUFS;
1237 skb_put_data(skb, ie + *offset, noffset - *offset);
1238 *offset = noffset;
1239 }
1240
1241 err = ieee80211_put_srates_elem(skb, sband, 0, rate_flags,
1242 ~rate_mask, WLAN_EID_EXT_SUPP_RATES);
1243 if (err)
1244 return err;
1245
1246 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1247 if (skb_tailroom(skb) < 3)
1248 return -ENOBUFS;
1249 skb_put_u8(skb, WLAN_EID_DS_PARAMS);
1250 skb_put_u8(skb, 1);
1251 skb_put_u8(skb,
1252 ieee80211_frequency_to_channel(chandef->chan->center_freq));
1253 }
1254
1255 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1256 return 0;
1257
1258 /* insert custom IEs that go before HT */
1259 if (ie && ie_len) {
1260 static const u8 before_ht[] = {
1261 /*
1262 * no need to list the ones split off already
1263 * (or generated here)
1264 */
1265 WLAN_EID_DS_PARAMS,
1266 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1267 };
1268 noffset = ieee80211_ie_split(ie, ie_len,
1269 before_ht, ARRAY_SIZE(before_ht),
1270 *offset);
1271 if (skb_tailroom(skb) < noffset - *offset)
1272 return -ENOBUFS;
1273 skb_put_data(skb, ie + *offset, noffset - *offset);
1274 *offset = noffset;
1275 }
1276
1277 if (sband->ht_cap.ht_supported) {
1278 u8 *pos;
1279
1280 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
1281 return -ENOBUFS;
1282
1283 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
1284 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1285 sband->ht_cap.cap);
1286 }
1287
1288 /* insert custom IEs that go before VHT */
1289 if (ie && ie_len) {
1290 static const u8 before_vht[] = {
1291 /*
1292 * no need to list the ones split off already
1293 * (or generated here)
1294 */
1295 WLAN_EID_BSS_COEX_2040,
1296 WLAN_EID_EXT_CAPABILITY,
1297 WLAN_EID_SSID_LIST,
1298 WLAN_EID_CHANNEL_USAGE,
1299 WLAN_EID_INTERWORKING,
1300 WLAN_EID_MESH_ID,
1301 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1302 };
1303 noffset = ieee80211_ie_split(ie, ie_len,
1304 before_vht, ARRAY_SIZE(before_vht),
1305 *offset);
1306 if (skb_tailroom(skb) < noffset - *offset)
1307 return -ENOBUFS;
1308 skb_put_data(skb, ie + *offset, noffset - *offset);
1309 *offset = noffset;
1310 }
1311
1312 /* Check if any channel in this sband supports at least 80 MHz */
1313 for (i = 0; i < sband->n_channels; i++) {
1314 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1315 IEEE80211_CHAN_NO_80MHZ))
1316 continue;
1317
1318 have_80mhz = true;
1319 break;
1320 }
1321
1322 if (sband->vht_cap.vht_supported && have_80mhz) {
1323 u8 *pos;
1324
1325 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
1326 return -ENOBUFS;
1327
1328 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
1329 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1330 sband->vht_cap.cap);
1331 }
1332
1333 /* insert custom IEs that go before HE */
1334 if (ie && ie_len) {
1335 static const u8 before_he[] = {
1336 /*
1337 * no need to list the ones split off before VHT
1338 * or generated here
1339 */
1340 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1341 WLAN_EID_AP_CSN,
1342 /* TODO: add 11ah/11aj/11ak elements */
1343 };
1344 noffset = ieee80211_ie_split(ie, ie_len,
1345 before_he, ARRAY_SIZE(before_he),
1346 *offset);
1347 if (skb_tailroom(skb) < noffset - *offset)
1348 return -ENOBUFS;
1349 skb_put_data(skb, ie + *offset, noffset - *offset);
1350 *offset = noffset;
1351 }
1352
1353 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1354 IEEE80211_CHAN_NO_HE)) {
1355 err = ieee80211_put_he_cap(skb, sdata, sband, NULL);
1356 if (err)
1357 return err;
1358 }
1359
1360 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1361 IEEE80211_CHAN_NO_HE |
1362 IEEE80211_CHAN_NO_EHT)) {
1363 err = ieee80211_put_eht_cap(skb, sdata, sband, NULL);
1364 if (err)
1365 return err;
1366 }
1367
1368 err = ieee80211_put_he_6ghz_cap(skb, sdata, IEEE80211_SMPS_OFF);
1369 if (err)
1370 return err;
1371
1372 /*
1373 * If adding more here, adjust code in main.c
1374 * that calculates local->scan_ies_len.
1375 */
1376
1377 return 0;
1378 }
1379
ieee80211_put_preq_ies(struct sk_buff * skb,struct ieee80211_sub_if_data * sdata,struct ieee80211_scan_ies * ie_desc,const u8 * ie,size_t ie_len,u8 bands_used,u32 * rate_masks,struct cfg80211_chan_def * chandef,u32 flags)1380 static int ieee80211_put_preq_ies(struct sk_buff *skb,
1381 struct ieee80211_sub_if_data *sdata,
1382 struct ieee80211_scan_ies *ie_desc,
1383 const u8 *ie, size_t ie_len,
1384 u8 bands_used, u32 *rate_masks,
1385 struct cfg80211_chan_def *chandef,
1386 u32 flags)
1387 {
1388 size_t custom_ie_offset = 0;
1389 int i, err;
1390
1391 memset(ie_desc, 0, sizeof(*ie_desc));
1392
1393 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1394 if (bands_used & BIT(i)) {
1395 ie_desc->ies[i] = skb_tail_pointer(skb);
1396 err = ieee80211_put_preq_ies_band(skb, sdata,
1397 ie, ie_len,
1398 &custom_ie_offset,
1399 i, rate_masks[i],
1400 chandef, flags);
1401 if (err)
1402 return err;
1403 ie_desc->len[i] = skb_tail_pointer(skb) -
1404 ie_desc->ies[i];
1405 }
1406 }
1407
1408 /* add any remaining custom IEs */
1409 if (ie && ie_len) {
1410 if (WARN_ONCE(skb_tailroom(skb) < ie_len - custom_ie_offset,
1411 "not enough space for preq custom IEs\n"))
1412 return -ENOBUFS;
1413 ie_desc->common_ies = skb_tail_pointer(skb);
1414 skb_put_data(skb, ie + custom_ie_offset,
1415 ie_len - custom_ie_offset);
1416 ie_desc->common_ie_len = skb_tail_pointer(skb) -
1417 ie_desc->common_ies;
1418 }
1419
1420 return 0;
1421 };
1422
ieee80211_build_preq_ies(struct ieee80211_sub_if_data * sdata,u8 * buffer,size_t buffer_len,struct ieee80211_scan_ies * ie_desc,const u8 * ie,size_t ie_len,u8 bands_used,u32 * rate_masks,struct cfg80211_chan_def * chandef,u32 flags)1423 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1424 size_t buffer_len,
1425 struct ieee80211_scan_ies *ie_desc,
1426 const u8 *ie, size_t ie_len,
1427 u8 bands_used, u32 *rate_masks,
1428 struct cfg80211_chan_def *chandef,
1429 u32 flags)
1430 {
1431 struct sk_buff *skb = alloc_skb(buffer_len, GFP_KERNEL);
1432 uintptr_t offs;
1433 int ret, i;
1434 u8 *start;
1435
1436 if (!skb)
1437 return -ENOMEM;
1438
1439 start = skb_tail_pointer(skb);
1440 memset(start, 0, skb_tailroom(skb));
1441 ret = ieee80211_put_preq_ies(skb, sdata, ie_desc, ie, ie_len,
1442 bands_used, rate_masks, chandef,
1443 flags);
1444 if (ret < 0) {
1445 goto out;
1446 }
1447
1448 if (skb->len > buffer_len) {
1449 ret = -ENOBUFS;
1450 goto out;
1451 }
1452
1453 memcpy(buffer, start, skb->len);
1454
1455 /* adjust ie_desc for copy */
1456 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1457 offs = ie_desc->ies[i] - start;
1458 ie_desc->ies[i] = buffer + offs;
1459 }
1460 offs = ie_desc->common_ies - start;
1461 ie_desc->common_ies = buffer + offs;
1462
1463 ret = skb->len;
1464 out:
1465 consume_skb(skb);
1466 return ret;
1467 }
1468
ieee80211_build_probe_req(struct ieee80211_sub_if_data * sdata,const u8 * src,const u8 * dst,u32 ratemask,struct ieee80211_channel * chan,const u8 * ssid,size_t ssid_len,const u8 * ie,size_t ie_len,u32 flags)1469 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1470 const u8 *src, const u8 *dst,
1471 u32 ratemask,
1472 struct ieee80211_channel *chan,
1473 const u8 *ssid, size_t ssid_len,
1474 const u8 *ie, size_t ie_len,
1475 u32 flags)
1476 {
1477 struct ieee80211_local *local = sdata->local;
1478 struct cfg80211_chan_def chandef;
1479 struct sk_buff *skb;
1480 struct ieee80211_mgmt *mgmt;
1481 u32 rate_masks[NUM_NL80211_BANDS] = {};
1482 struct ieee80211_scan_ies dummy_ie_desc;
1483
1484 /*
1485 * Do not send DS Channel parameter for directed probe requests
1486 * in order to maximize the chance that we get a response. Some
1487 * badly-behaved APs don't respond when this parameter is included.
1488 */
1489 chandef.width = sdata->vif.bss_conf.chanreq.oper.width;
1490 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1491 chandef.chan = NULL;
1492 else
1493 chandef.chan = chan;
1494
1495 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1496 local->scan_ies_len + ie_len);
1497 if (!skb)
1498 return NULL;
1499
1500 rate_masks[chan->band] = ratemask;
1501 ieee80211_put_preq_ies(skb, sdata, &dummy_ie_desc,
1502 ie, ie_len, BIT(chan->band),
1503 rate_masks, &chandef, flags);
1504
1505 if (dst) {
1506 mgmt = (struct ieee80211_mgmt *) skb->data;
1507 memcpy(mgmt->da, dst, ETH_ALEN);
1508 memcpy(mgmt->bssid, dst, ETH_ALEN);
1509 }
1510
1511 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1512
1513 return skb;
1514 }
1515
ieee80211_sta_get_rates(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems,enum nl80211_band band,u32 * basic_rates)1516 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1517 struct ieee802_11_elems *elems,
1518 enum nl80211_band band, u32 *basic_rates)
1519 {
1520 struct ieee80211_supported_band *sband;
1521 size_t num_rates;
1522 u32 supp_rates, rate_flags;
1523 int i, j;
1524
1525 sband = sdata->local->hw.wiphy->bands[band];
1526 if (WARN_ON(!sband))
1527 return 1;
1528
1529 rate_flags =
1530 ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chanreq.oper);
1531
1532 num_rates = sband->n_bitrates;
1533 supp_rates = 0;
1534 for (i = 0; i < elems->supp_rates_len +
1535 elems->ext_supp_rates_len; i++) {
1536 u8 rate = 0;
1537 int own_rate;
1538 bool is_basic;
1539 if (i < elems->supp_rates_len)
1540 rate = elems->supp_rates[i];
1541 else if (elems->ext_supp_rates)
1542 rate = elems->ext_supp_rates
1543 [i - elems->supp_rates_len];
1544 own_rate = 5 * (rate & 0x7f);
1545 is_basic = !!(rate & 0x80);
1546
1547 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1548 continue;
1549
1550 for (j = 0; j < num_rates; j++) {
1551 int brate;
1552 if ((rate_flags & sband->bitrates[j].flags)
1553 != rate_flags)
1554 continue;
1555
1556 brate = sband->bitrates[j].bitrate;
1557
1558 if (brate == own_rate) {
1559 supp_rates |= BIT(j);
1560 if (basic_rates && is_basic)
1561 *basic_rates |= BIT(j);
1562 }
1563 }
1564 }
1565 return supp_rates;
1566 }
1567
ieee80211_stop_device(struct ieee80211_local * local)1568 void ieee80211_stop_device(struct ieee80211_local *local)
1569 {
1570 ieee80211_handle_queued_frames(local);
1571
1572 ieee80211_led_radio(local, false);
1573 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1574
1575 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1576
1577 flush_workqueue(local->workqueue);
1578 wiphy_work_flush(local->hw.wiphy, NULL);
1579 drv_stop(local);
1580 }
1581
ieee80211_flush_completed_scan(struct ieee80211_local * local,bool aborted)1582 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1583 bool aborted)
1584 {
1585 /* It's possible that we don't handle the scan completion in
1586 * time during suspend, so if it's still marked as completed
1587 * here, queue the work and flush it to clean things up.
1588 * Instead of calling the worker function directly here, we
1589 * really queue it to avoid potential races with other flows
1590 * scheduling the same work.
1591 */
1592 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1593 /* If coming from reconfiguration failure, abort the scan so
1594 * we don't attempt to continue a partial HW scan - which is
1595 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1596 * completed scan, and a 5 GHz portion is still pending.
1597 */
1598 if (aborted)
1599 set_bit(SCAN_ABORTED, &local->scanning);
1600 wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0);
1601 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
1602 }
1603 }
1604
ieee80211_handle_reconfig_failure(struct ieee80211_local * local)1605 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1606 {
1607 struct ieee80211_sub_if_data *sdata;
1608 struct ieee80211_chanctx *ctx;
1609
1610 lockdep_assert_wiphy(local->hw.wiphy);
1611
1612 /*
1613 * We get here if during resume the device can't be restarted properly.
1614 * We might also get here if this happens during HW reset, which is a
1615 * slightly different situation and we need to drop all connections in
1616 * the latter case.
1617 *
1618 * Ask cfg80211 to turn off all interfaces, this will result in more
1619 * warnings but at least we'll then get into a clean stopped state.
1620 */
1621
1622 local->resuming = false;
1623 local->suspended = false;
1624 local->in_reconfig = false;
1625 local->reconfig_failure = true;
1626
1627 ieee80211_flush_completed_scan(local, true);
1628
1629 /* scheduled scan clearly can't be running any more, but tell
1630 * cfg80211 and clear local state
1631 */
1632 ieee80211_sched_scan_end(local);
1633
1634 list_for_each_entry(sdata, &local->interfaces, list)
1635 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1636
1637 /* Mark channel contexts as not being in the driver any more to avoid
1638 * removing them from the driver during the shutdown process...
1639 */
1640 list_for_each_entry(ctx, &local->chanctx_list, list)
1641 ctx->driver_present = false;
1642 }
1643
ieee80211_assign_chanctx(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link)1644 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1645 struct ieee80211_sub_if_data *sdata,
1646 struct ieee80211_link_data *link)
1647 {
1648 struct ieee80211_chanctx_conf *conf;
1649 struct ieee80211_chanctx *ctx;
1650
1651 lockdep_assert_wiphy(local->hw.wiphy);
1652
1653 conf = rcu_dereference_protected(link->conf->chanctx_conf,
1654 lockdep_is_held(&local->hw.wiphy->mtx));
1655 if (conf) {
1656 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1657 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
1658 }
1659 }
1660
ieee80211_reconfig_stations(struct ieee80211_sub_if_data * sdata)1661 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1662 {
1663 struct ieee80211_local *local = sdata->local;
1664 struct sta_info *sta;
1665
1666 lockdep_assert_wiphy(local->hw.wiphy);
1667
1668 /* add STAs back */
1669 list_for_each_entry(sta, &local->sta_list, list) {
1670 enum ieee80211_sta_state state;
1671
1672 if (!sta->uploaded || sta->sdata != sdata)
1673 continue;
1674
1675 for (state = IEEE80211_STA_NOTEXIST;
1676 state < sta->sta_state; state++)
1677 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1678 state + 1));
1679 }
1680 }
1681
ieee80211_reconfig_nan(struct ieee80211_sub_if_data * sdata)1682 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1683 {
1684 struct cfg80211_nan_func *func, **funcs;
1685 int res, id, i = 0;
1686
1687 res = drv_start_nan(sdata->local, sdata,
1688 &sdata->u.nan.conf);
1689 if (WARN_ON(res))
1690 return res;
1691
1692 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1693 sizeof(*funcs),
1694 GFP_KERNEL);
1695 if (!funcs)
1696 return -ENOMEM;
1697
1698 /* Add all the functions:
1699 * This is a little bit ugly. We need to call a potentially sleeping
1700 * callback for each NAN function, so we can't hold the spinlock.
1701 */
1702 spin_lock_bh(&sdata->u.nan.func_lock);
1703
1704 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1705 funcs[i++] = func;
1706
1707 spin_unlock_bh(&sdata->u.nan.func_lock);
1708
1709 for (i = 0; funcs[i]; i++) {
1710 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1711 if (WARN_ON(res))
1712 ieee80211_nan_func_terminated(&sdata->vif,
1713 funcs[i]->instance_id,
1714 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1715 GFP_KERNEL);
1716 }
1717
1718 kfree(funcs);
1719
1720 return 0;
1721 }
1722
ieee80211_reconfig_ap_links(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,u64 changed)1723 static void ieee80211_reconfig_ap_links(struct ieee80211_local *local,
1724 struct ieee80211_sub_if_data *sdata,
1725 u64 changed)
1726 {
1727 int link_id;
1728
1729 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
1730 struct ieee80211_link_data *link;
1731
1732 if (!(sdata->vif.active_links & BIT(link_id)))
1733 continue;
1734
1735 link = sdata_dereference(sdata->link[link_id], sdata);
1736 if (!link)
1737 continue;
1738
1739 if (rcu_access_pointer(link->u.ap.beacon))
1740 drv_start_ap(local, sdata, link->conf);
1741
1742 if (!link->conf->enable_beacon)
1743 continue;
1744
1745 changed |= BSS_CHANGED_BEACON |
1746 BSS_CHANGED_BEACON_ENABLED;
1747
1748 ieee80211_link_info_change_notify(sdata, link, changed);
1749 }
1750 }
1751
ieee80211_reconfig(struct ieee80211_local * local)1752 int ieee80211_reconfig(struct ieee80211_local *local)
1753 {
1754 struct ieee80211_hw *hw = &local->hw;
1755 struct ieee80211_sub_if_data *sdata;
1756 struct ieee80211_chanctx *ctx;
1757 struct sta_info *sta;
1758 int res, i;
1759 bool reconfig_due_to_wowlan = false;
1760 struct ieee80211_sub_if_data *sched_scan_sdata;
1761 struct cfg80211_sched_scan_request *sched_scan_req;
1762 bool sched_scan_stopped = false;
1763 bool suspended = local->suspended;
1764 bool in_reconfig = false;
1765
1766 lockdep_assert_wiphy(local->hw.wiphy);
1767
1768 /* nothing to do if HW shouldn't run */
1769 if (!local->open_count)
1770 goto wake_up;
1771
1772 #ifdef CONFIG_PM
1773 if (suspended)
1774 local->resuming = true;
1775
1776 if (local->wowlan) {
1777 /*
1778 * In the wowlan case, both mac80211 and the device
1779 * are functional when the resume op is called, so
1780 * clear local->suspended so the device could operate
1781 * normally (e.g. pass rx frames).
1782 */
1783 local->suspended = false;
1784 res = drv_resume(local);
1785 local->wowlan = false;
1786 if (res < 0) {
1787 local->resuming = false;
1788 return res;
1789 }
1790 if (res == 0)
1791 goto wake_up;
1792 WARN_ON(res > 1);
1793 /*
1794 * res is 1, which means the driver requested
1795 * to go through a regular reset on wakeup.
1796 * restore local->suspended in this case.
1797 */
1798 reconfig_due_to_wowlan = true;
1799 local->suspended = true;
1800 }
1801 #endif
1802
1803 /*
1804 * In case of hw_restart during suspend (without wowlan),
1805 * cancel restart work, as we are reconfiguring the device
1806 * anyway.
1807 * Note that restart_work is scheduled on a frozen workqueue,
1808 * so we can't deadlock in this case.
1809 */
1810 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1811 cancel_work_sync(&local->restart_work);
1812
1813 local->started = false;
1814
1815 /*
1816 * Upon resume hardware can sometimes be goofy due to
1817 * various platform / driver / bus issues, so restarting
1818 * the device may at times not work immediately. Propagate
1819 * the error.
1820 */
1821 res = drv_start(local);
1822 if (res) {
1823 if (suspended)
1824 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1825 else
1826 WARN(1, "Hardware became unavailable during restart.\n");
1827 ieee80211_handle_reconfig_failure(local);
1828 return res;
1829 }
1830
1831 /* setup fragmentation threshold */
1832 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1833
1834 /* setup RTS threshold */
1835 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1836
1837 /* reset coverage class */
1838 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1839
1840 ieee80211_led_radio(local, true);
1841 ieee80211_mod_tpt_led_trig(local,
1842 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1843
1844 /* add interfaces */
1845 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1846 if (sdata) {
1847 /* in HW restart it exists already */
1848 WARN_ON(local->resuming);
1849 res = drv_add_interface(local, sdata);
1850 if (WARN_ON(res)) {
1851 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1852 synchronize_net();
1853 kfree(sdata);
1854 }
1855 }
1856
1857 list_for_each_entry(sdata, &local->interfaces, list) {
1858 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1859 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1860 ieee80211_sdata_running(sdata)) {
1861 res = drv_add_interface(local, sdata);
1862 if (WARN_ON(res))
1863 break;
1864 }
1865 }
1866
1867 /* If adding any of the interfaces failed above, roll back and
1868 * report failure.
1869 */
1870 if (res) {
1871 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1872 list)
1873 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1874 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1875 ieee80211_sdata_running(sdata))
1876 drv_remove_interface(local, sdata);
1877 ieee80211_handle_reconfig_failure(local);
1878 return res;
1879 }
1880
1881 /* add channel contexts */
1882 list_for_each_entry(ctx, &local->chanctx_list, list)
1883 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1884 WARN_ON(drv_add_chanctx(local, ctx));
1885
1886 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1887 if (sdata && ieee80211_sdata_running(sdata))
1888 ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
1889
1890 /* reconfigure hardware */
1891 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_LISTEN_INTERVAL |
1892 IEEE80211_CONF_CHANGE_MONITOR |
1893 IEEE80211_CONF_CHANGE_PS |
1894 IEEE80211_CONF_CHANGE_RETRY_LIMITS |
1895 IEEE80211_CONF_CHANGE_IDLE);
1896
1897 ieee80211_configure_filter(local);
1898
1899 /* Finally also reconfigure all the BSS information */
1900 list_for_each_entry(sdata, &local->interfaces, list) {
1901 /* common change flags for all interface types - link only */
1902 u64 changed = BSS_CHANGED_ERP_CTS_PROT |
1903 BSS_CHANGED_ERP_PREAMBLE |
1904 BSS_CHANGED_ERP_SLOT |
1905 BSS_CHANGED_HT |
1906 BSS_CHANGED_BASIC_RATES |
1907 BSS_CHANGED_BEACON_INT |
1908 BSS_CHANGED_BSSID |
1909 BSS_CHANGED_CQM |
1910 BSS_CHANGED_QOS |
1911 BSS_CHANGED_TXPOWER |
1912 BSS_CHANGED_MCAST_RATE;
1913 struct ieee80211_link_data *link = NULL;
1914 unsigned int link_id;
1915 u32 active_links = 0;
1916
1917 if (!ieee80211_sdata_running(sdata))
1918 continue;
1919
1920 if (ieee80211_vif_is_mld(&sdata->vif)) {
1921 struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS] = {
1922 [0] = &sdata->vif.bss_conf,
1923 };
1924
1925 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1926 /* start with a single active link */
1927 active_links = sdata->vif.active_links;
1928 link_id = ffs(active_links) - 1;
1929 sdata->vif.active_links = BIT(link_id);
1930 }
1931
1932 drv_change_vif_links(local, sdata, 0,
1933 sdata->vif.active_links,
1934 old);
1935 }
1936
1937 sdata->restart_active_links = active_links;
1938
1939 for (link_id = 0;
1940 link_id < ARRAY_SIZE(sdata->vif.link_conf);
1941 link_id++) {
1942 if (!ieee80211_vif_link_active(&sdata->vif, link_id))
1943 continue;
1944
1945 link = sdata_dereference(sdata->link[link_id], sdata);
1946 if (!link)
1947 continue;
1948
1949 ieee80211_assign_chanctx(local, sdata, link);
1950 }
1951
1952 switch (sdata->vif.type) {
1953 case NL80211_IFTYPE_AP_VLAN:
1954 case NL80211_IFTYPE_MONITOR:
1955 break;
1956 case NL80211_IFTYPE_ADHOC:
1957 if (sdata->vif.cfg.ibss_joined)
1958 WARN_ON(drv_join_ibss(local, sdata));
1959 fallthrough;
1960 default:
1961 ieee80211_reconfig_stations(sdata);
1962 fallthrough;
1963 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1964 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1965 drv_conf_tx(local, &sdata->deflink, i,
1966 &sdata->deflink.tx_conf[i]);
1967 break;
1968 }
1969
1970 if (sdata->vif.bss_conf.mu_mimo_owner)
1971 changed |= BSS_CHANGED_MU_GROUPS;
1972
1973 if (!ieee80211_vif_is_mld(&sdata->vif))
1974 changed |= BSS_CHANGED_IDLE;
1975
1976 switch (sdata->vif.type) {
1977 case NL80211_IFTYPE_STATION:
1978 if (!ieee80211_vif_is_mld(&sdata->vif)) {
1979 changed |= BSS_CHANGED_ASSOC |
1980 BSS_CHANGED_ARP_FILTER |
1981 BSS_CHANGED_PS;
1982
1983 /* Re-send beacon info report to the driver */
1984 if (sdata->deflink.u.mgd.have_beacon)
1985 changed |= BSS_CHANGED_BEACON_INFO;
1986
1987 if (sdata->vif.bss_conf.max_idle_period ||
1988 sdata->vif.bss_conf.protected_keep_alive)
1989 changed |= BSS_CHANGED_KEEP_ALIVE;
1990
1991 ieee80211_bss_info_change_notify(sdata,
1992 changed);
1993 } else if (!WARN_ON(!link)) {
1994 ieee80211_link_info_change_notify(sdata, link,
1995 changed);
1996 changed = BSS_CHANGED_ASSOC |
1997 BSS_CHANGED_IDLE |
1998 BSS_CHANGED_PS |
1999 BSS_CHANGED_ARP_FILTER;
2000 ieee80211_vif_cfg_change_notify(sdata, changed);
2001 }
2002 break;
2003 case NL80211_IFTYPE_OCB:
2004 changed |= BSS_CHANGED_OCB;
2005 ieee80211_bss_info_change_notify(sdata, changed);
2006 break;
2007 case NL80211_IFTYPE_ADHOC:
2008 changed |= BSS_CHANGED_IBSS;
2009 fallthrough;
2010 case NL80211_IFTYPE_AP:
2011 changed |= BSS_CHANGED_P2P_PS;
2012
2013 if (ieee80211_vif_is_mld(&sdata->vif))
2014 ieee80211_vif_cfg_change_notify(sdata,
2015 BSS_CHANGED_SSID);
2016 else
2017 changed |= BSS_CHANGED_SSID;
2018
2019 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2020 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2021 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2022 changed |= BSS_CHANGED_FTM_RESPONDER;
2023
2024 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2025 changed |= BSS_CHANGED_AP_PROBE_RESP;
2026
2027 if (ieee80211_vif_is_mld(&sdata->vif)) {
2028 ieee80211_reconfig_ap_links(local,
2029 sdata,
2030 changed);
2031 break;
2032 }
2033
2034 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2035 drv_start_ap(local, sdata,
2036 sdata->deflink.conf);
2037 }
2038 fallthrough;
2039 case NL80211_IFTYPE_MESH_POINT:
2040 if (sdata->vif.bss_conf.enable_beacon) {
2041 changed |= BSS_CHANGED_BEACON |
2042 BSS_CHANGED_BEACON_ENABLED;
2043 ieee80211_bss_info_change_notify(sdata, changed);
2044 }
2045 break;
2046 case NL80211_IFTYPE_NAN:
2047 res = ieee80211_reconfig_nan(sdata);
2048 if (res < 0) {
2049 ieee80211_handle_reconfig_failure(local);
2050 return res;
2051 }
2052 break;
2053 case NL80211_IFTYPE_AP_VLAN:
2054 case NL80211_IFTYPE_MONITOR:
2055 case NL80211_IFTYPE_P2P_DEVICE:
2056 /* nothing to do */
2057 break;
2058 case NL80211_IFTYPE_UNSPECIFIED:
2059 case NUM_NL80211_IFTYPES:
2060 case NL80211_IFTYPE_P2P_CLIENT:
2061 case NL80211_IFTYPE_P2P_GO:
2062 case NL80211_IFTYPE_WDS:
2063 WARN_ON(1);
2064 break;
2065 }
2066 }
2067
2068 ieee80211_recalc_ps(local);
2069
2070 /*
2071 * The sta might be in psm against the ap (e.g. because
2072 * this was the state before a hw restart), so we
2073 * explicitly send a null packet in order to make sure
2074 * it'll sync against the ap (and get out of psm).
2075 */
2076 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2077 list_for_each_entry(sdata, &local->interfaces, list) {
2078 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2079 continue;
2080 if (!sdata->u.mgd.associated)
2081 continue;
2082
2083 ieee80211_send_nullfunc(local, sdata, false);
2084 }
2085 }
2086
2087 /* APs are now beaconing, add back stations */
2088 list_for_each_entry(sdata, &local->interfaces, list) {
2089 if (!ieee80211_sdata_running(sdata))
2090 continue;
2091
2092 switch (sdata->vif.type) {
2093 case NL80211_IFTYPE_AP_VLAN:
2094 case NL80211_IFTYPE_AP:
2095 ieee80211_reconfig_stations(sdata);
2096 break;
2097 default:
2098 break;
2099 }
2100 }
2101
2102 /* add back keys */
2103 list_for_each_entry(sdata, &local->interfaces, list)
2104 ieee80211_reenable_keys(sdata);
2105
2106 /* re-enable multi-link for client interfaces */
2107 list_for_each_entry(sdata, &local->interfaces, list) {
2108 if (sdata->restart_active_links)
2109 ieee80211_set_active_links(&sdata->vif,
2110 sdata->restart_active_links);
2111 /*
2112 * If a link switch was scheduled before the restart, and ran
2113 * before reconfig, it will do nothing, so re-schedule.
2114 */
2115 if (sdata->desired_active_links)
2116 wiphy_work_queue(sdata->local->hw.wiphy,
2117 &sdata->activate_links_work);
2118 }
2119
2120 /* Reconfigure sched scan if it was interrupted by FW restart */
2121 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2122 lockdep_is_held(&local->hw.wiphy->mtx));
2123 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2124 lockdep_is_held(&local->hw.wiphy->mtx));
2125 if (sched_scan_sdata && sched_scan_req)
2126 /*
2127 * Sched scan stopped, but we don't want to report it. Instead,
2128 * we're trying to reschedule. However, if more than one scan
2129 * plan was set, we cannot reschedule since we don't know which
2130 * scan plan was currently running (and some scan plans may have
2131 * already finished).
2132 */
2133 if (sched_scan_req->n_scan_plans > 1 ||
2134 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2135 sched_scan_req)) {
2136 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2137 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2138 sched_scan_stopped = true;
2139 }
2140
2141 if (sched_scan_stopped)
2142 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2143
2144 wake_up:
2145
2146 if (local->monitors == local->open_count && local->monitors > 0)
2147 ieee80211_add_virtual_monitor(local);
2148
2149 /*
2150 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2151 * sessions can be established after a resume.
2152 *
2153 * Also tear down aggregation sessions since reconfiguring
2154 * them in a hardware restart scenario is not easily done
2155 * right now, and the hardware will have lost information
2156 * about the sessions, but we and the AP still think they
2157 * are active. This is really a workaround though.
2158 */
2159 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2160 list_for_each_entry(sta, &local->sta_list, list) {
2161 if (!local->resuming)
2162 ieee80211_sta_tear_down_BA_sessions(
2163 sta, AGG_STOP_LOCAL_REQUEST);
2164 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2165 }
2166 }
2167
2168 /*
2169 * If this is for hw restart things are still running.
2170 * We may want to change that later, however.
2171 */
2172 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2173 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2174
2175 if (local->in_reconfig) {
2176 in_reconfig = local->in_reconfig;
2177 local->in_reconfig = false;
2178 barrier();
2179
2180 /* Restart deferred ROCs */
2181 ieee80211_start_next_roc(local);
2182
2183 /* Requeue all works */
2184 list_for_each_entry(sdata, &local->interfaces, list)
2185 wiphy_work_queue(local->hw.wiphy, &sdata->work);
2186 }
2187
2188 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2189 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2190 false);
2191
2192 if (in_reconfig) {
2193 list_for_each_entry(sdata, &local->interfaces, list) {
2194 if (!ieee80211_sdata_running(sdata))
2195 continue;
2196 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2197 ieee80211_sta_restart(sdata);
2198 }
2199 }
2200
2201 if (!suspended)
2202 return 0;
2203
2204 #ifdef CONFIG_PM
2205 /* first set suspended false, then resuming */
2206 local->suspended = false;
2207 mb();
2208 local->resuming = false;
2209
2210 ieee80211_flush_completed_scan(local, false);
2211
2212 if (local->open_count && !reconfig_due_to_wowlan)
2213 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2214
2215 list_for_each_entry(sdata, &local->interfaces, list) {
2216 if (!ieee80211_sdata_running(sdata))
2217 continue;
2218 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2219 ieee80211_sta_restart(sdata);
2220 }
2221
2222 mod_timer(&local->sta_cleanup, jiffies + 1);
2223 #else
2224 WARN_ON(1);
2225 #endif
2226
2227 return 0;
2228 }
2229
ieee80211_reconfig_disconnect(struct ieee80211_vif * vif,u8 flag)2230 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2231 {
2232 struct ieee80211_sub_if_data *sdata;
2233 struct ieee80211_local *local;
2234 struct ieee80211_key *key;
2235
2236 if (WARN_ON(!vif))
2237 return;
2238
2239 sdata = vif_to_sdata(vif);
2240 local = sdata->local;
2241
2242 lockdep_assert_wiphy(local->hw.wiphy);
2243
2244 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2245 !local->resuming))
2246 return;
2247
2248 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2249 !local->in_reconfig))
2250 return;
2251
2252 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2253 return;
2254
2255 sdata->flags |= flag;
2256
2257 list_for_each_entry(key, &sdata->key_list, list)
2258 key->flags |= KEY_FLAG_TAINTED;
2259 }
2260
ieee80211_hw_restart_disconnect(struct ieee80211_vif * vif)2261 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2262 {
2263 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2264 }
2265 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2266
ieee80211_resume_disconnect(struct ieee80211_vif * vif)2267 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2268 {
2269 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2270 }
2271 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2272
ieee80211_recalc_smps(struct ieee80211_sub_if_data * sdata,struct ieee80211_link_data * link)2273 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2274 struct ieee80211_link_data *link)
2275 {
2276 struct ieee80211_local *local = sdata->local;
2277 struct ieee80211_chanctx_conf *chanctx_conf;
2278 struct ieee80211_chanctx *chanctx;
2279
2280 lockdep_assert_wiphy(local->hw.wiphy);
2281
2282 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2283 lockdep_is_held(&local->hw.wiphy->mtx));
2284
2285 /*
2286 * This function can be called from a work, thus it may be possible
2287 * that the chanctx_conf is removed (due to a disconnection, for
2288 * example).
2289 * So nothing should be done in such case.
2290 */
2291 if (!chanctx_conf)
2292 return;
2293
2294 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2295 ieee80211_recalc_smps_chanctx(local, chanctx);
2296 }
2297
ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data * sdata,int link_id)2298 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2299 int link_id)
2300 {
2301 struct ieee80211_local *local = sdata->local;
2302 struct ieee80211_chanctx_conf *chanctx_conf;
2303 struct ieee80211_chanctx *chanctx;
2304 int i;
2305
2306 lockdep_assert_wiphy(local->hw.wiphy);
2307
2308 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
2309 struct ieee80211_bss_conf *bss_conf;
2310
2311 if (link_id >= 0 && link_id != i)
2312 continue;
2313
2314 rcu_read_lock();
2315 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
2316 if (!bss_conf) {
2317 rcu_read_unlock();
2318 continue;
2319 }
2320
2321 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
2322 lockdep_is_held(&local->hw.wiphy->mtx));
2323 /*
2324 * Since we hold the wiphy mutex (checked above)
2325 * we can take the chanctx_conf pointer out of the
2326 * RCU critical section, it cannot go away without
2327 * the mutex. Just the way we reached it could - in
2328 * theory - go away, but we don't really care and
2329 * it really shouldn't happen anyway.
2330 */
2331 rcu_read_unlock();
2332
2333 if (!chanctx_conf)
2334 return;
2335
2336 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
2337 conf);
2338 ieee80211_recalc_chanctx_min_def(local, chanctx, NULL);
2339 }
2340 }
2341
ieee80211_ie_split_vendor(const u8 * ies,size_t ielen,size_t offset)2342 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2343 {
2344 size_t pos = offset;
2345
2346 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2347 pos += 2 + ies[pos + 1];
2348
2349 return pos;
2350 }
2351
ieee80211_ie_build_ht_cap(u8 * pos,struct ieee80211_sta_ht_cap * ht_cap,u16 cap)2352 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2353 u16 cap)
2354 {
2355 __le16 tmp;
2356
2357 *pos++ = WLAN_EID_HT_CAPABILITY;
2358 *pos++ = sizeof(struct ieee80211_ht_cap);
2359 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2360
2361 /* capability flags */
2362 tmp = cpu_to_le16(cap);
2363 memcpy(pos, &tmp, sizeof(u16));
2364 pos += sizeof(u16);
2365
2366 /* AMPDU parameters */
2367 *pos++ = ht_cap->ampdu_factor |
2368 (ht_cap->ampdu_density <<
2369 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2370
2371 /* MCS set */
2372 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2373 pos += sizeof(ht_cap->mcs);
2374
2375 /* extended capabilities */
2376 pos += sizeof(__le16);
2377
2378 /* BF capabilities */
2379 pos += sizeof(__le32);
2380
2381 /* antenna selection */
2382 pos += sizeof(u8);
2383
2384 return pos;
2385 }
2386
ieee80211_ie_build_vht_cap(u8 * pos,struct ieee80211_sta_vht_cap * vht_cap,u32 cap)2387 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2388 u32 cap)
2389 {
2390 __le32 tmp;
2391
2392 *pos++ = WLAN_EID_VHT_CAPABILITY;
2393 *pos++ = sizeof(struct ieee80211_vht_cap);
2394 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2395
2396 /* capability flags */
2397 tmp = cpu_to_le32(cap);
2398 memcpy(pos, &tmp, sizeof(u32));
2399 pos += sizeof(u32);
2400
2401 /* VHT MCS set */
2402 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2403 pos += sizeof(vht_cap->vht_mcs);
2404
2405 return pos;
2406 }
2407
2408 /* this may return more than ieee80211_put_he_6ghz_cap() will need */
ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data * sdata)2409 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata)
2410 {
2411 const struct ieee80211_sta_he_cap *he_cap;
2412 struct ieee80211_supported_band *sband;
2413 u8 n;
2414
2415 sband = ieee80211_get_sband(sdata);
2416 if (!sband)
2417 return 0;
2418
2419 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2420 if (!he_cap)
2421 return 0;
2422
2423 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2424 return 2 + 1 +
2425 sizeof(he_cap->he_cap_elem) + n +
2426 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2427 he_cap->he_cap_elem.phy_cap_info);
2428 }
2429
2430 static void
ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings * conn,const struct ieee80211_sta_he_cap * he_cap,struct ieee80211_he_cap_elem * elem)2431 ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings *conn,
2432 const struct ieee80211_sta_he_cap *he_cap,
2433 struct ieee80211_he_cap_elem *elem)
2434 {
2435 u8 ru_limit, max_ru;
2436
2437 *elem = he_cap->he_cap_elem;
2438
2439 switch (conn->bw_limit) {
2440 case IEEE80211_CONN_BW_LIMIT_20:
2441 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_242;
2442 break;
2443 case IEEE80211_CONN_BW_LIMIT_40:
2444 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_484;
2445 break;
2446 case IEEE80211_CONN_BW_LIMIT_80:
2447 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_996;
2448 break;
2449 default:
2450 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_2x996;
2451 break;
2452 }
2453
2454 max_ru = elem->phy_cap_info[8] & IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
2455 max_ru = min(max_ru, ru_limit);
2456 elem->phy_cap_info[8] &= ~IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
2457 elem->phy_cap_info[8] |= max_ru;
2458
2459 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) {
2460 elem->phy_cap_info[0] &=
2461 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2462 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2463 elem->phy_cap_info[9] &=
2464 ~IEEE80211_HE_PHY_CAP9_LONGER_THAN_16_SIGB_OFDM_SYM;
2465 }
2466
2467 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
2468 elem->phy_cap_info[0] &=
2469 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
2470 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G);
2471 elem->phy_cap_info[5] &=
2472 ~IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK;
2473 elem->phy_cap_info[7] &=
2474 ~(IEEE80211_HE_PHY_CAP7_STBC_TX_ABOVE_80MHZ |
2475 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ);
2476 }
2477 }
2478
ieee80211_put_he_cap(struct sk_buff * skb,struct ieee80211_sub_if_data * sdata,const struct ieee80211_supported_band * sband,const struct ieee80211_conn_settings * conn)2479 int ieee80211_put_he_cap(struct sk_buff *skb,
2480 struct ieee80211_sub_if_data *sdata,
2481 const struct ieee80211_supported_band *sband,
2482 const struct ieee80211_conn_settings *conn)
2483 {
2484 const struct ieee80211_sta_he_cap *he_cap;
2485 struct ieee80211_he_cap_elem elem;
2486 u8 *len;
2487 u8 n;
2488 u8 ie_len;
2489
2490 if (!conn)
2491 conn = &ieee80211_conn_settings_unlimited;
2492
2493 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2494 if (!he_cap)
2495 return 0;
2496
2497 /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2498 ieee80211_get_adjusted_he_cap(conn, he_cap, &elem);
2499
2500 n = ieee80211_he_mcs_nss_size(&elem);
2501 ie_len = 2 + 1 +
2502 sizeof(he_cap->he_cap_elem) + n +
2503 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2504 he_cap->he_cap_elem.phy_cap_info);
2505
2506 if (skb_tailroom(skb) < ie_len)
2507 return -ENOBUFS;
2508
2509 skb_put_u8(skb, WLAN_EID_EXTENSION);
2510 len = skb_put(skb, 1); /* We'll set the size later below */
2511 skb_put_u8(skb, WLAN_EID_EXT_HE_CAPABILITY);
2512
2513 /* Fixed data */
2514 skb_put_data(skb, &elem, sizeof(elem));
2515
2516 skb_put_data(skb, &he_cap->he_mcs_nss_supp, n);
2517
2518 /* Check if PPE Threshold should be present */
2519 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2520 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2521 goto end;
2522
2523 /*
2524 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2525 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2526 */
2527 n = hweight8(he_cap->ppe_thres[0] &
2528 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2529 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2530 IEEE80211_PPE_THRES_NSS_POS));
2531
2532 /*
2533 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2534 * total size.
2535 */
2536 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2537 n = DIV_ROUND_UP(n, 8);
2538
2539 /* Copy PPE Thresholds */
2540 skb_put_data(skb, &he_cap->ppe_thres, n);
2541
2542 end:
2543 *len = skb_tail_pointer(skb) - len - 1;
2544 return 0;
2545 }
2546
ieee80211_put_he_6ghz_cap(struct sk_buff * skb,struct ieee80211_sub_if_data * sdata,enum ieee80211_smps_mode smps_mode)2547 int ieee80211_put_he_6ghz_cap(struct sk_buff *skb,
2548 struct ieee80211_sub_if_data *sdata,
2549 enum ieee80211_smps_mode smps_mode)
2550 {
2551 struct ieee80211_supported_band *sband;
2552 const struct ieee80211_sband_iftype_data *iftd;
2553 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2554 __le16 cap;
2555
2556 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2557 BIT(NL80211_BAND_6GHZ),
2558 IEEE80211_CHAN_NO_HE))
2559 return 0;
2560
2561 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2562
2563 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2564 if (!iftd)
2565 return 0;
2566
2567 /* Check for device HE 6 GHz capability before adding element */
2568 if (!iftd->he_6ghz_capa.capa)
2569 return 0;
2570
2571 cap = iftd->he_6ghz_capa.capa;
2572 cap &= cpu_to_le16(~IEEE80211_HE_6GHZ_CAP_SM_PS);
2573
2574 switch (smps_mode) {
2575 case IEEE80211_SMPS_AUTOMATIC:
2576 case IEEE80211_SMPS_NUM_MODES:
2577 WARN_ON(1);
2578 fallthrough;
2579 case IEEE80211_SMPS_OFF:
2580 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2581 IEEE80211_HE_6GHZ_CAP_SM_PS);
2582 break;
2583 case IEEE80211_SMPS_STATIC:
2584 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2585 IEEE80211_HE_6GHZ_CAP_SM_PS);
2586 break;
2587 case IEEE80211_SMPS_DYNAMIC:
2588 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2589 IEEE80211_HE_6GHZ_CAP_SM_PS);
2590 break;
2591 }
2592
2593 if (skb_tailroom(skb) < 2 + 1 + sizeof(cap))
2594 return -ENOBUFS;
2595
2596 skb_put_u8(skb, WLAN_EID_EXTENSION);
2597 skb_put_u8(skb, 1 + sizeof(cap));
2598 skb_put_u8(skb, WLAN_EID_EXT_HE_6GHZ_CAPA);
2599 skb_put_data(skb, &cap, sizeof(cap));
2600 return 0;
2601 }
2602
ieee80211_ie_build_ht_oper(u8 * pos,struct ieee80211_sta_ht_cap * ht_cap,const struct cfg80211_chan_def * chandef,u16 prot_mode,bool rifs_mode)2603 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2604 const struct cfg80211_chan_def *chandef,
2605 u16 prot_mode, bool rifs_mode)
2606 {
2607 struct ieee80211_ht_operation *ht_oper;
2608 /* Build HT Information */
2609 *pos++ = WLAN_EID_HT_OPERATION;
2610 *pos++ = sizeof(struct ieee80211_ht_operation);
2611 ht_oper = (struct ieee80211_ht_operation *)pos;
2612 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2613 chandef->chan->center_freq);
2614 switch (chandef->width) {
2615 case NL80211_CHAN_WIDTH_160:
2616 case NL80211_CHAN_WIDTH_80P80:
2617 case NL80211_CHAN_WIDTH_80:
2618 case NL80211_CHAN_WIDTH_40:
2619 if (chandef->center_freq1 > chandef->chan->center_freq)
2620 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2621 else
2622 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2623 break;
2624 case NL80211_CHAN_WIDTH_320:
2625 /* HT information element should not be included on 6GHz */
2626 WARN_ON(1);
2627 return pos;
2628 default:
2629 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2630 break;
2631 }
2632 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2633 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2634 chandef->width != NL80211_CHAN_WIDTH_20)
2635 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2636
2637 if (rifs_mode)
2638 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2639
2640 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2641 ht_oper->stbc_param = 0x0000;
2642
2643 /* It seems that Basic MCS set and Supported MCS set
2644 are identical for the first 10 bytes */
2645 memset(&ht_oper->basic_set, 0, 16);
2646 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2647
2648 return pos + sizeof(struct ieee80211_ht_operation);
2649 }
2650
ieee80211_ie_build_wide_bw_cs(u8 * pos,const struct cfg80211_chan_def * chandef)2651 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2652 const struct cfg80211_chan_def *chandef)
2653 {
2654 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2655 *pos++ = 3; /* IE length */
2656 /* New channel width */
2657 switch (chandef->width) {
2658 case NL80211_CHAN_WIDTH_80:
2659 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2660 break;
2661 case NL80211_CHAN_WIDTH_160:
2662 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2663 break;
2664 case NL80211_CHAN_WIDTH_80P80:
2665 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2666 break;
2667 case NL80211_CHAN_WIDTH_320:
2668 /* The behavior is not defined for 320 MHz channels */
2669 WARN_ON(1);
2670 fallthrough;
2671 default:
2672 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2673 }
2674
2675 /* new center frequency segment 0 */
2676 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2677 /* new center frequency segment 1 */
2678 if (chandef->center_freq2)
2679 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2680 else
2681 *pos++ = 0;
2682 }
2683
ieee80211_ie_build_vht_oper(u8 * pos,struct ieee80211_sta_vht_cap * vht_cap,const struct cfg80211_chan_def * chandef)2684 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2685 const struct cfg80211_chan_def *chandef)
2686 {
2687 struct ieee80211_vht_operation *vht_oper;
2688
2689 *pos++ = WLAN_EID_VHT_OPERATION;
2690 *pos++ = sizeof(struct ieee80211_vht_operation);
2691 vht_oper = (struct ieee80211_vht_operation *)pos;
2692 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2693 chandef->center_freq1);
2694 if (chandef->center_freq2)
2695 vht_oper->center_freq_seg1_idx =
2696 ieee80211_frequency_to_channel(chandef->center_freq2);
2697 else
2698 vht_oper->center_freq_seg1_idx = 0x00;
2699
2700 switch (chandef->width) {
2701 case NL80211_CHAN_WIDTH_160:
2702 /*
2703 * Convert 160 MHz channel width to new style as interop
2704 * workaround.
2705 */
2706 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2707 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2708 if (chandef->chan->center_freq < chandef->center_freq1)
2709 vht_oper->center_freq_seg0_idx -= 8;
2710 else
2711 vht_oper->center_freq_seg0_idx += 8;
2712 break;
2713 case NL80211_CHAN_WIDTH_80P80:
2714 /*
2715 * Convert 80+80 MHz channel width to new style as interop
2716 * workaround.
2717 */
2718 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2719 break;
2720 case NL80211_CHAN_WIDTH_80:
2721 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2722 break;
2723 case NL80211_CHAN_WIDTH_320:
2724 /* VHT information element should not be included on 6GHz */
2725 WARN_ON(1);
2726 return pos;
2727 default:
2728 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2729 break;
2730 }
2731
2732 /* don't require special VHT peer rates */
2733 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2734
2735 return pos + sizeof(struct ieee80211_vht_operation);
2736 }
2737
ieee80211_ie_build_he_oper(u8 * pos,struct cfg80211_chan_def * chandef)2738 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
2739 {
2740 struct ieee80211_he_operation *he_oper;
2741 struct ieee80211_he_6ghz_oper *he_6ghz_op;
2742 u32 he_oper_params;
2743 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
2744
2745 if (chandef->chan->band == NL80211_BAND_6GHZ)
2746 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
2747
2748 *pos++ = WLAN_EID_EXTENSION;
2749 *pos++ = ie_len;
2750 *pos++ = WLAN_EID_EXT_HE_OPERATION;
2751
2752 he_oper_params = 0;
2753 he_oper_params |= u32_encode_bits(1023, /* disabled */
2754 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2755 he_oper_params |= u32_encode_bits(1,
2756 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2757 he_oper_params |= u32_encode_bits(1,
2758 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2759 if (chandef->chan->band == NL80211_BAND_6GHZ)
2760 he_oper_params |= u32_encode_bits(1,
2761 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
2762
2763 he_oper = (struct ieee80211_he_operation *)pos;
2764 he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2765
2766 /* don't require special HE peer rates */
2767 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2768 pos += sizeof(struct ieee80211_he_operation);
2769
2770 if (chandef->chan->band != NL80211_BAND_6GHZ)
2771 goto out;
2772
2773 /* TODO add VHT operational */
2774 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
2775 he_6ghz_op->minrate = 6; /* 6 Mbps */
2776 he_6ghz_op->primary =
2777 ieee80211_frequency_to_channel(chandef->chan->center_freq);
2778 he_6ghz_op->ccfs0 =
2779 ieee80211_frequency_to_channel(chandef->center_freq1);
2780 if (chandef->center_freq2)
2781 he_6ghz_op->ccfs1 =
2782 ieee80211_frequency_to_channel(chandef->center_freq2);
2783 else
2784 he_6ghz_op->ccfs1 = 0;
2785
2786 switch (chandef->width) {
2787 case NL80211_CHAN_WIDTH_320:
2788 /*
2789 * TODO: mesh operation is not defined over 6GHz 320 MHz
2790 * channels.
2791 */
2792 WARN_ON(1);
2793 break;
2794 case NL80211_CHAN_WIDTH_160:
2795 /* Convert 160 MHz channel width to new style as interop
2796 * workaround.
2797 */
2798 he_6ghz_op->control =
2799 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
2800 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
2801 if (chandef->chan->center_freq < chandef->center_freq1)
2802 he_6ghz_op->ccfs0 -= 8;
2803 else
2804 he_6ghz_op->ccfs0 += 8;
2805 fallthrough;
2806 case NL80211_CHAN_WIDTH_80P80:
2807 he_6ghz_op->control =
2808 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
2809 break;
2810 case NL80211_CHAN_WIDTH_80:
2811 he_6ghz_op->control =
2812 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
2813 break;
2814 case NL80211_CHAN_WIDTH_40:
2815 he_6ghz_op->control =
2816 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
2817 break;
2818 default:
2819 he_6ghz_op->control =
2820 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
2821 break;
2822 }
2823
2824 pos += sizeof(struct ieee80211_he_6ghz_oper);
2825
2826 out:
2827 return pos;
2828 }
2829
ieee80211_ie_build_eht_oper(u8 * pos,struct cfg80211_chan_def * chandef,const struct ieee80211_sta_eht_cap * eht_cap)2830 u8 *ieee80211_ie_build_eht_oper(u8 *pos, struct cfg80211_chan_def *chandef,
2831 const struct ieee80211_sta_eht_cap *eht_cap)
2832
2833 {
2834 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss =
2835 &eht_cap->eht_mcs_nss_supp.only_20mhz;
2836 struct ieee80211_eht_operation *eht_oper;
2837 struct ieee80211_eht_operation_info *eht_oper_info;
2838 u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional);
2839 u8 eht_oper_info_len =
2840 offsetof(struct ieee80211_eht_operation_info, optional);
2841 u8 chan_width = 0;
2842
2843 *pos++ = WLAN_EID_EXTENSION;
2844 *pos++ = 1 + eht_oper_len + eht_oper_info_len;
2845 *pos++ = WLAN_EID_EXT_EHT_OPERATION;
2846
2847 eht_oper = (struct ieee80211_eht_operation *)pos;
2848
2849 memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss));
2850 eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT;
2851 pos += eht_oper_len;
2852
2853 eht_oper_info =
2854 (struct ieee80211_eht_operation_info *)eht_oper->optional;
2855
2856 eht_oper_info->ccfs0 =
2857 ieee80211_frequency_to_channel(chandef->center_freq1);
2858 if (chandef->center_freq2)
2859 eht_oper_info->ccfs1 =
2860 ieee80211_frequency_to_channel(chandef->center_freq2);
2861 else
2862 eht_oper_info->ccfs1 = 0;
2863
2864 switch (chandef->width) {
2865 case NL80211_CHAN_WIDTH_320:
2866 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
2867 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
2868 if (chandef->chan->center_freq < chandef->center_freq1)
2869 eht_oper_info->ccfs0 -= 16;
2870 else
2871 eht_oper_info->ccfs0 += 16;
2872 break;
2873 case NL80211_CHAN_WIDTH_160:
2874 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
2875 if (chandef->chan->center_freq < chandef->center_freq1)
2876 eht_oper_info->ccfs0 -= 8;
2877 else
2878 eht_oper_info->ccfs0 += 8;
2879 fallthrough;
2880 case NL80211_CHAN_WIDTH_80P80:
2881 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ;
2882 break;
2883 case NL80211_CHAN_WIDTH_80:
2884 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ;
2885 break;
2886 case NL80211_CHAN_WIDTH_40:
2887 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ;
2888 break;
2889 default:
2890 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ;
2891 break;
2892 }
2893 eht_oper_info->control = chan_width;
2894 pos += eht_oper_info_len;
2895
2896 /* TODO: eht_oper_info->optional */
2897
2898 return pos;
2899 }
2900
ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation * ht_oper,struct cfg80211_chan_def * chandef)2901 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2902 struct cfg80211_chan_def *chandef)
2903 {
2904 enum nl80211_channel_type channel_type;
2905
2906 if (!ht_oper)
2907 return false;
2908
2909 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2910 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2911 channel_type = NL80211_CHAN_HT20;
2912 break;
2913 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2914 channel_type = NL80211_CHAN_HT40PLUS;
2915 break;
2916 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2917 channel_type = NL80211_CHAN_HT40MINUS;
2918 break;
2919 default:
2920 return false;
2921 }
2922
2923 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2924 return true;
2925 }
2926
ieee80211_chandef_vht_oper(struct ieee80211_hw * hw,u32 vht_cap_info,const struct ieee80211_vht_operation * oper,const struct ieee80211_ht_operation * htop,struct cfg80211_chan_def * chandef)2927 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
2928 const struct ieee80211_vht_operation *oper,
2929 const struct ieee80211_ht_operation *htop,
2930 struct cfg80211_chan_def *chandef)
2931 {
2932 struct cfg80211_chan_def new = *chandef;
2933 int cf0, cf1;
2934 int ccfs0, ccfs1, ccfs2;
2935 int ccf0, ccf1;
2936 u32 vht_cap;
2937 bool support_80_80 = false;
2938 bool support_160 = false;
2939 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
2940 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
2941 u8 supp_chwidth = u32_get_bits(vht_cap_info,
2942 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
2943
2944 if (!oper || !htop)
2945 return false;
2946
2947 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
2948 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
2949 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
2950 support_80_80 = ((vht_cap &
2951 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
2952 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
2953 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
2954 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
2955 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
2956 ccfs0 = oper->center_freq_seg0_idx;
2957 ccfs1 = oper->center_freq_seg1_idx;
2958 ccfs2 = (le16_to_cpu(htop->operation_mode) &
2959 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2960 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2961
2962 ccf0 = ccfs0;
2963
2964 /* if not supported, parse as though we didn't understand it */
2965 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2966 ext_nss_bw_supp = 0;
2967
2968 /*
2969 * Cf. IEEE 802.11 Table 9-250
2970 *
2971 * We really just consider that because it's inefficient to connect
2972 * at a higher bandwidth than we'll actually be able to use.
2973 */
2974 switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
2975 default:
2976 case 0x00:
2977 ccf1 = 0;
2978 support_160 = false;
2979 support_80_80 = false;
2980 break;
2981 case 0x01:
2982 support_80_80 = false;
2983 fallthrough;
2984 case 0x02:
2985 case 0x03:
2986 ccf1 = ccfs2;
2987 break;
2988 case 0x10:
2989 ccf1 = ccfs1;
2990 break;
2991 case 0x11:
2992 case 0x12:
2993 if (!ccfs1)
2994 ccf1 = ccfs2;
2995 else
2996 ccf1 = ccfs1;
2997 break;
2998 case 0x13:
2999 case 0x20:
3000 case 0x23:
3001 ccf1 = ccfs1;
3002 break;
3003 }
3004
3005 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3006 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3007
3008 switch (oper->chan_width) {
3009 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3010 /* just use HT information directly */
3011 break;
3012 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3013 new.width = NL80211_CHAN_WIDTH_80;
3014 new.center_freq1 = cf0;
3015 /* If needed, adjust based on the newer interop workaround. */
3016 if (ccf1) {
3017 unsigned int diff;
3018
3019 diff = abs(ccf1 - ccf0);
3020 if ((diff == 8) && support_160) {
3021 new.width = NL80211_CHAN_WIDTH_160;
3022 new.center_freq1 = cf1;
3023 } else if ((diff > 8) && support_80_80) {
3024 new.width = NL80211_CHAN_WIDTH_80P80;
3025 new.center_freq2 = cf1;
3026 }
3027 }
3028 break;
3029 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3030 /* deprecated encoding */
3031 new.width = NL80211_CHAN_WIDTH_160;
3032 new.center_freq1 = cf0;
3033 break;
3034 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3035 /* deprecated encoding */
3036 new.width = NL80211_CHAN_WIDTH_80P80;
3037 new.center_freq1 = cf0;
3038 new.center_freq2 = cf1;
3039 break;
3040 default:
3041 return false;
3042 }
3043
3044 if (!cfg80211_chandef_valid(&new))
3045 return false;
3046
3047 *chandef = new;
3048 return true;
3049 }
3050
ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info * info,struct cfg80211_chan_def * chandef)3051 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info,
3052 struct cfg80211_chan_def *chandef)
3053 {
3054 chandef->center_freq1 =
3055 ieee80211_channel_to_frequency(info->ccfs0,
3056 chandef->chan->band);
3057
3058 switch (u8_get_bits(info->control,
3059 IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3060 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3061 chandef->width = NL80211_CHAN_WIDTH_20;
3062 break;
3063 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3064 chandef->width = NL80211_CHAN_WIDTH_40;
3065 break;
3066 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3067 chandef->width = NL80211_CHAN_WIDTH_80;
3068 break;
3069 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3070 chandef->width = NL80211_CHAN_WIDTH_160;
3071 chandef->center_freq1 =
3072 ieee80211_channel_to_frequency(info->ccfs1,
3073 chandef->chan->band);
3074 break;
3075 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3076 chandef->width = NL80211_CHAN_WIDTH_320;
3077 chandef->center_freq1 =
3078 ieee80211_channel_to_frequency(info->ccfs1,
3079 chandef->chan->band);
3080 break;
3081 }
3082 }
3083
ieee80211_chandef_he_6ghz_oper(struct ieee80211_local * local,const struct ieee80211_he_operation * he_oper,const struct ieee80211_eht_operation * eht_oper,struct cfg80211_chan_def * chandef)3084 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_local *local,
3085 const struct ieee80211_he_operation *he_oper,
3086 const struct ieee80211_eht_operation *eht_oper,
3087 struct cfg80211_chan_def *chandef)
3088 {
3089 struct cfg80211_chan_def he_chandef = *chandef;
3090 const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3091 u32 freq;
3092
3093 if (chandef->chan->band != NL80211_BAND_6GHZ)
3094 return true;
3095
3096 if (!he_oper)
3097 return false;
3098
3099 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3100 if (!he_6ghz_oper)
3101 return false;
3102
3103 /*
3104 * The EHT operation IE does not contain the primary channel so the
3105 * primary channel frequency should be taken from the 6 GHz operation
3106 * information.
3107 */
3108 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3109 NL80211_BAND_6GHZ);
3110 he_chandef.chan = ieee80211_get_channel(local->hw.wiphy, freq);
3111
3112 if (!he_chandef.chan)
3113 return false;
3114
3115 if (!eht_oper ||
3116 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3117 switch (u8_get_bits(he_6ghz_oper->control,
3118 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3119 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3120 he_chandef.width = NL80211_CHAN_WIDTH_20;
3121 break;
3122 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3123 he_chandef.width = NL80211_CHAN_WIDTH_40;
3124 break;
3125 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3126 he_chandef.width = NL80211_CHAN_WIDTH_80;
3127 break;
3128 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3129 he_chandef.width = NL80211_CHAN_WIDTH_80;
3130 if (!he_6ghz_oper->ccfs1)
3131 break;
3132 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8)
3133 he_chandef.width = NL80211_CHAN_WIDTH_160;
3134 else
3135 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3136 break;
3137 }
3138
3139 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3140 he_chandef.center_freq1 =
3141 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3142 NL80211_BAND_6GHZ);
3143 } else {
3144 he_chandef.center_freq1 =
3145 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3146 NL80211_BAND_6GHZ);
3147 he_chandef.center_freq2 =
3148 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3149 NL80211_BAND_6GHZ);
3150 }
3151 } else {
3152 ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
3153 &he_chandef);
3154 he_chandef.punctured =
3155 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper);
3156 }
3157
3158 if (!cfg80211_chandef_valid(&he_chandef))
3159 return false;
3160
3161 *chandef = he_chandef;
3162
3163 return true;
3164 }
3165
ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie * oper,struct cfg80211_chan_def * chandef)3166 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3167 struct cfg80211_chan_def *chandef)
3168 {
3169 u32 oper_freq;
3170
3171 if (!oper)
3172 return false;
3173
3174 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3175 case IEEE80211_S1G_CHANWIDTH_1MHZ:
3176 chandef->width = NL80211_CHAN_WIDTH_1;
3177 break;
3178 case IEEE80211_S1G_CHANWIDTH_2MHZ:
3179 chandef->width = NL80211_CHAN_WIDTH_2;
3180 break;
3181 case IEEE80211_S1G_CHANWIDTH_4MHZ:
3182 chandef->width = NL80211_CHAN_WIDTH_4;
3183 break;
3184 case IEEE80211_S1G_CHANWIDTH_8MHZ:
3185 chandef->width = NL80211_CHAN_WIDTH_8;
3186 break;
3187 case IEEE80211_S1G_CHANWIDTH_16MHZ:
3188 chandef->width = NL80211_CHAN_WIDTH_16;
3189 break;
3190 default:
3191 return false;
3192 }
3193
3194 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3195 NL80211_BAND_S1GHZ);
3196 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3197 chandef->freq1_offset = oper_freq % 1000;
3198
3199 return true;
3200 }
3201
ieee80211_put_srates_elem(struct sk_buff * skb,const struct ieee80211_supported_band * sband,u32 basic_rates,u32 rate_flags,u32 masked_rates,u8 element_id)3202 int ieee80211_put_srates_elem(struct sk_buff *skb,
3203 const struct ieee80211_supported_band *sband,
3204 u32 basic_rates, u32 rate_flags, u32 masked_rates,
3205 u8 element_id)
3206 {
3207 u8 i, rates, skip;
3208
3209 rates = 0;
3210 for (i = 0; i < sband->n_bitrates; i++) {
3211 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3212 continue;
3213 if (masked_rates & BIT(i))
3214 continue;
3215 rates++;
3216 }
3217
3218 if (element_id == WLAN_EID_SUPP_RATES) {
3219 rates = min_t(u8, rates, 8);
3220 skip = 0;
3221 } else {
3222 skip = 8;
3223 if (rates <= skip)
3224 return 0;
3225 rates -= skip;
3226 }
3227
3228 if (skb_tailroom(skb) < rates + 2)
3229 return -ENOBUFS;
3230
3231 skb_put_u8(skb, element_id);
3232 skb_put_u8(skb, rates);
3233
3234 for (i = 0; i < sband->n_bitrates && rates; i++) {
3235 int rate;
3236 u8 basic;
3237
3238 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3239 continue;
3240 if (masked_rates & BIT(i))
3241 continue;
3242
3243 if (skip > 0) {
3244 skip--;
3245 continue;
3246 }
3247
3248 basic = basic_rates & BIT(i) ? 0x80 : 0;
3249
3250 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
3251 skb_put_u8(skb, basic | (u8)rate);
3252 rates--;
3253 }
3254
3255 WARN(rates > 0, "rates confused: rates:%d, element:%d\n",
3256 rates, element_id);
3257
3258 return 0;
3259 }
3260
ieee80211_ave_rssi(struct ieee80211_vif * vif)3261 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3262 {
3263 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3264
3265 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
3266 return 0;
3267
3268 return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
3269 }
3270 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3271
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info * mcs)3272 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3273 {
3274 if (!mcs)
3275 return 1;
3276
3277 /* TODO: consider rx_highest */
3278
3279 if (mcs->rx_mask[3])
3280 return 4;
3281 if (mcs->rx_mask[2])
3282 return 3;
3283 if (mcs->rx_mask[1])
3284 return 2;
3285 return 1;
3286 }
3287
3288 /**
3289 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3290 * @local: mac80211 hw info struct
3291 * @status: RX status
3292 * @mpdu_len: total MPDU length (including FCS)
3293 * @mpdu_offset: offset into MPDU to calculate timestamp at
3294 *
3295 * This function calculates the RX timestamp at the given MPDU offset, taking
3296 * into account what the RX timestamp was. An offset of 0 will just normalize
3297 * the timestamp to TSF at beginning of MPDU reception.
3298 *
3299 * Returns: the calculated timestamp
3300 */
ieee80211_calculate_rx_timestamp(struct ieee80211_local * local,struct ieee80211_rx_status * status,unsigned int mpdu_len,unsigned int mpdu_offset)3301 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3302 struct ieee80211_rx_status *status,
3303 unsigned int mpdu_len,
3304 unsigned int mpdu_offset)
3305 {
3306 u64 ts = status->mactime;
3307 bool mactime_plcp_start;
3308 struct rate_info ri;
3309 u16 rate;
3310 u8 n_ltf;
3311
3312 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3313 return 0;
3314
3315 mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) ==
3316 RX_FLAG_MACTIME_PLCP_START;
3317
3318 memset(&ri, 0, sizeof(ri));
3319
3320 ri.bw = status->bw;
3321
3322 /* Fill cfg80211 rate info */
3323 switch (status->encoding) {
3324 case RX_ENC_EHT:
3325 ri.flags |= RATE_INFO_FLAGS_EHT_MCS;
3326 ri.mcs = status->rate_idx;
3327 ri.nss = status->nss;
3328 ri.eht_ru_alloc = status->eht.ru;
3329 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3330 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3331 /* TODO/FIXME: is this right? handle other PPDUs */
3332 if (mactime_plcp_start) {
3333 mpdu_offset += 2;
3334 ts += 36;
3335 }
3336 break;
3337 case RX_ENC_HE:
3338 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3339 ri.mcs = status->rate_idx;
3340 ri.nss = status->nss;
3341 ri.he_ru_alloc = status->he_ru;
3342 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3343 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3344
3345 /*
3346 * See P802.11ax_D6.0, section 27.3.4 for
3347 * VHT PPDU format.
3348 */
3349 if (mactime_plcp_start) {
3350 mpdu_offset += 2;
3351 ts += 36;
3352
3353 /*
3354 * TODO:
3355 * For HE MU PPDU, add the HE-SIG-B.
3356 * For HE ER PPDU, add 8us for the HE-SIG-A.
3357 * For HE TB PPDU, add 4us for the HE-STF.
3358 * Add the HE-LTF durations - variable.
3359 */
3360 }
3361
3362 break;
3363 case RX_ENC_HT:
3364 ri.mcs = status->rate_idx;
3365 ri.flags |= RATE_INFO_FLAGS_MCS;
3366 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3367 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3368
3369 /*
3370 * See P802.11REVmd_D3.0, section 19.3.2 for
3371 * HT PPDU format.
3372 */
3373 if (mactime_plcp_start) {
3374 mpdu_offset += 2;
3375 if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3376 ts += 24;
3377 else
3378 ts += 32;
3379
3380 /*
3381 * Add Data HT-LTFs per streams
3382 * TODO: add Extension HT-LTFs, 4us per LTF
3383 */
3384 n_ltf = ((ri.mcs >> 3) & 3) + 1;
3385 n_ltf = n_ltf == 3 ? 4 : n_ltf;
3386 ts += n_ltf * 4;
3387 }
3388
3389 break;
3390 case RX_ENC_VHT:
3391 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3392 ri.mcs = status->rate_idx;
3393 ri.nss = status->nss;
3394 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3395 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3396
3397 /*
3398 * See P802.11REVmd_D3.0, section 21.3.2 for
3399 * VHT PPDU format.
3400 */
3401 if (mactime_plcp_start) {
3402 mpdu_offset += 2;
3403 ts += 36;
3404
3405 /*
3406 * Add VHT-LTFs per streams
3407 */
3408 n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3409 ri.nss + 1 : ri.nss;
3410 ts += 4 * n_ltf;
3411 }
3412
3413 break;
3414 default:
3415 WARN_ON(1);
3416 fallthrough;
3417 case RX_ENC_LEGACY: {
3418 struct ieee80211_supported_band *sband;
3419
3420 sband = local->hw.wiphy->bands[status->band];
3421 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
3422
3423 if (mactime_plcp_start) {
3424 if (status->band == NL80211_BAND_5GHZ) {
3425 ts += 20;
3426 mpdu_offset += 2;
3427 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3428 ts += 96;
3429 } else {
3430 ts += 192;
3431 }
3432 }
3433 break;
3434 }
3435 }
3436
3437 rate = cfg80211_calculate_bitrate(&ri);
3438 if (WARN_ONCE(!rate,
3439 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3440 (unsigned long long)status->flag, status->rate_idx,
3441 status->nss))
3442 return 0;
3443
3444 /* rewind from end of MPDU */
3445 if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END)
3446 ts -= mpdu_len * 8 * 10 / rate;
3447
3448 ts += mpdu_offset * 8 * 10 / rate;
3449
3450 return ts;
3451 }
3452
ieee80211_dfs_cac_cancel(struct ieee80211_local * local)3453 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3454 {
3455 struct ieee80211_sub_if_data *sdata;
3456 struct cfg80211_chan_def chandef;
3457
3458 lockdep_assert_wiphy(local->hw.wiphy);
3459
3460 list_for_each_entry(sdata, &local->interfaces, list) {
3461 /* it might be waiting for the local->mtx, but then
3462 * by the time it gets it, sdata->wdev.cac_started
3463 * will no longer be true
3464 */
3465 wiphy_delayed_work_cancel(local->hw.wiphy,
3466 &sdata->deflink.dfs_cac_timer_work);
3467
3468 if (sdata->wdev.cac_started) {
3469 chandef = sdata->vif.bss_conf.chanreq.oper;
3470 ieee80211_link_release_channel(&sdata->deflink);
3471 cfg80211_cac_event(sdata->dev,
3472 &chandef,
3473 NL80211_RADAR_CAC_ABORTED,
3474 GFP_KERNEL);
3475 }
3476 }
3477 }
3478
ieee80211_dfs_radar_detected_work(struct wiphy * wiphy,struct wiphy_work * work)3479 void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy,
3480 struct wiphy_work *work)
3481 {
3482 struct ieee80211_local *local =
3483 container_of(work, struct ieee80211_local, radar_detected_work);
3484 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3485 struct ieee80211_chanctx *ctx;
3486 int num_chanctx = 0;
3487
3488 lockdep_assert_wiphy(local->hw.wiphy);
3489
3490 list_for_each_entry(ctx, &local->chanctx_list, list) {
3491 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3492 continue;
3493
3494 num_chanctx++;
3495 chandef = ctx->conf.def;
3496 }
3497
3498 ieee80211_dfs_cac_cancel(local);
3499
3500 if (num_chanctx > 1)
3501 /* XXX: multi-channel is not supported yet */
3502 WARN_ON(1);
3503 else
3504 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3505 }
3506
ieee80211_radar_detected(struct ieee80211_hw * hw)3507 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3508 {
3509 struct ieee80211_local *local = hw_to_local(hw);
3510
3511 trace_api_radar_detected(local);
3512
3513 wiphy_work_queue(hw->wiphy, &local->radar_detected_work);
3514 }
3515 EXPORT_SYMBOL(ieee80211_radar_detected);
3516
ieee80211_chandef_downgrade(struct cfg80211_chan_def * c,struct ieee80211_conn_settings * conn)3517 void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c,
3518 struct ieee80211_conn_settings *conn)
3519 {
3520 enum nl80211_chan_width new_primary_width;
3521 struct ieee80211_conn_settings _ignored = {};
3522
3523 /* allow passing NULL if caller doesn't care */
3524 if (!conn)
3525 conn = &_ignored;
3526
3527 again:
3528 /* no-HT indicates nothing to do */
3529 new_primary_width = NL80211_CHAN_WIDTH_20_NOHT;
3530
3531 switch (c->width) {
3532 default:
3533 case NL80211_CHAN_WIDTH_20_NOHT:
3534 WARN_ON_ONCE(1);
3535 fallthrough;
3536 case NL80211_CHAN_WIDTH_20:
3537 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3538 conn->mode = IEEE80211_CONN_MODE_LEGACY;
3539 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3540 c->punctured = 0;
3541 break;
3542 case NL80211_CHAN_WIDTH_40:
3543 c->width = NL80211_CHAN_WIDTH_20;
3544 c->center_freq1 = c->chan->center_freq;
3545 if (conn->mode == IEEE80211_CONN_MODE_VHT)
3546 conn->mode = IEEE80211_CONN_MODE_HT;
3547 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3548 c->punctured = 0;
3549 break;
3550 case NL80211_CHAN_WIDTH_80:
3551 new_primary_width = NL80211_CHAN_WIDTH_40;
3552 if (conn->mode == IEEE80211_CONN_MODE_VHT)
3553 conn->mode = IEEE80211_CONN_MODE_HT;
3554 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_40;
3555 break;
3556 case NL80211_CHAN_WIDTH_80P80:
3557 c->center_freq2 = 0;
3558 c->width = NL80211_CHAN_WIDTH_80;
3559 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
3560 break;
3561 case NL80211_CHAN_WIDTH_160:
3562 new_primary_width = NL80211_CHAN_WIDTH_80;
3563 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
3564 break;
3565 case NL80211_CHAN_WIDTH_320:
3566 new_primary_width = NL80211_CHAN_WIDTH_160;
3567 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
3568 break;
3569 case NL80211_CHAN_WIDTH_1:
3570 case NL80211_CHAN_WIDTH_2:
3571 case NL80211_CHAN_WIDTH_4:
3572 case NL80211_CHAN_WIDTH_8:
3573 case NL80211_CHAN_WIDTH_16:
3574 WARN_ON_ONCE(1);
3575 /* keep c->width */
3576 conn->mode = IEEE80211_CONN_MODE_S1G;
3577 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3578 break;
3579 case NL80211_CHAN_WIDTH_5:
3580 case NL80211_CHAN_WIDTH_10:
3581 WARN_ON_ONCE(1);
3582 /* keep c->width */
3583 conn->mode = IEEE80211_CONN_MODE_LEGACY;
3584 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3585 break;
3586 }
3587
3588 if (new_primary_width != NL80211_CHAN_WIDTH_20_NOHT) {
3589 c->center_freq1 = cfg80211_chandef_primary(c, new_primary_width,
3590 &c->punctured);
3591 c->width = new_primary_width;
3592 }
3593
3594 /*
3595 * With an 80 MHz channel, we might have the puncturing in the primary
3596 * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width.
3597 * In that case, downgrade again.
3598 */
3599 if (!cfg80211_chandef_valid(c) && c->punctured)
3600 goto again;
3601
3602 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3603 }
3604
3605 /*
3606 * Returns true if smps_mode_new is strictly more restrictive than
3607 * smps_mode_old.
3608 */
ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,enum ieee80211_smps_mode smps_mode_new)3609 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3610 enum ieee80211_smps_mode smps_mode_new)
3611 {
3612 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3613 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3614 return false;
3615
3616 switch (smps_mode_old) {
3617 case IEEE80211_SMPS_STATIC:
3618 return false;
3619 case IEEE80211_SMPS_DYNAMIC:
3620 return smps_mode_new == IEEE80211_SMPS_STATIC;
3621 case IEEE80211_SMPS_OFF:
3622 return smps_mode_new != IEEE80211_SMPS_OFF;
3623 default:
3624 WARN_ON(1);
3625 }
3626
3627 return false;
3628 }
3629
ieee80211_send_action_csa(struct ieee80211_sub_if_data * sdata,struct cfg80211_csa_settings * csa_settings)3630 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3631 struct cfg80211_csa_settings *csa_settings)
3632 {
3633 struct sk_buff *skb;
3634 struct ieee80211_mgmt *mgmt;
3635 struct ieee80211_local *local = sdata->local;
3636 int freq;
3637 int hdr_len = offsetofend(struct ieee80211_mgmt,
3638 u.action.u.chan_switch);
3639 u8 *pos;
3640
3641 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3642 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3643 return -EOPNOTSUPP;
3644
3645 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3646 5 + /* channel switch announcement element */
3647 3 + /* secondary channel offset element */
3648 5 + /* wide bandwidth channel switch announcement */
3649 8); /* mesh channel switch parameters element */
3650 if (!skb)
3651 return -ENOMEM;
3652
3653 skb_reserve(skb, local->tx_headroom);
3654 mgmt = skb_put_zero(skb, hdr_len);
3655 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3656 IEEE80211_STYPE_ACTION);
3657
3658 eth_broadcast_addr(mgmt->da);
3659 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3660 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3661 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3662 } else {
3663 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3664 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3665 }
3666 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3667 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3668 pos = skb_put(skb, 5);
3669 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3670 *pos++ = 3; /* IE length */
3671 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3672 freq = csa_settings->chandef.chan->center_freq;
3673 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3674 *pos++ = csa_settings->count; /* count */
3675
3676 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3677 enum nl80211_channel_type ch_type;
3678
3679 skb_put(skb, 3);
3680 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3681 *pos++ = 1; /* IE length */
3682 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3683 if (ch_type == NL80211_CHAN_HT40PLUS)
3684 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3685 else
3686 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3687 }
3688
3689 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3690 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3691
3692 skb_put(skb, 8);
3693 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3694 *pos++ = 6; /* IE length */
3695 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3696 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3697 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3698 *pos++ |= csa_settings->block_tx ?
3699 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3700 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3701 pos += 2;
3702 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3703 pos += 2;
3704 }
3705
3706 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3707 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3708 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3709 skb_put(skb, 5);
3710 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3711 }
3712
3713 ieee80211_tx_skb(sdata, skb);
3714 return 0;
3715 }
3716
3717 static bool
ieee80211_extend_noa_desc(struct ieee80211_noa_data * data,u32 tsf,int i)3718 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3719 {
3720 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3721 int skip;
3722
3723 if (end > 0)
3724 return false;
3725
3726 /* One shot NOA */
3727 if (data->count[i] == 1)
3728 return false;
3729
3730 if (data->desc[i].interval == 0)
3731 return false;
3732
3733 /* End time is in the past, check for repetitions */
3734 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3735 if (data->count[i] < 255) {
3736 if (data->count[i] <= skip) {
3737 data->count[i] = 0;
3738 return false;
3739 }
3740
3741 data->count[i] -= skip;
3742 }
3743
3744 data->desc[i].start += skip * data->desc[i].interval;
3745
3746 return true;
3747 }
3748
3749 static bool
ieee80211_extend_absent_time(struct ieee80211_noa_data * data,u32 tsf,s32 * offset)3750 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3751 s32 *offset)
3752 {
3753 bool ret = false;
3754 int i;
3755
3756 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3757 s32 cur;
3758
3759 if (!data->count[i])
3760 continue;
3761
3762 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3763 ret = true;
3764
3765 cur = data->desc[i].start - tsf;
3766 if (cur > *offset)
3767 continue;
3768
3769 cur = data->desc[i].start + data->desc[i].duration - tsf;
3770 if (cur > *offset)
3771 *offset = cur;
3772 }
3773
3774 return ret;
3775 }
3776
3777 static u32
ieee80211_get_noa_absent_time(struct ieee80211_noa_data * data,u32 tsf)3778 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3779 {
3780 s32 offset = 0;
3781 int tries = 0;
3782 /*
3783 * arbitrary limit, used to avoid infinite loops when combined NoA
3784 * descriptors cover the full time period.
3785 */
3786 int max_tries = 5;
3787
3788 ieee80211_extend_absent_time(data, tsf, &offset);
3789 do {
3790 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3791 break;
3792
3793 tries++;
3794 } while (tries < max_tries);
3795
3796 return offset;
3797 }
3798
ieee80211_update_p2p_noa(struct ieee80211_noa_data * data,u32 tsf)3799 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3800 {
3801 u32 next_offset = BIT(31) - 1;
3802 int i;
3803
3804 data->absent = 0;
3805 data->has_next_tsf = false;
3806 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3807 s32 start;
3808
3809 if (!data->count[i])
3810 continue;
3811
3812 ieee80211_extend_noa_desc(data, tsf, i);
3813 start = data->desc[i].start - tsf;
3814 if (start <= 0)
3815 data->absent |= BIT(i);
3816
3817 if (next_offset > start)
3818 next_offset = start;
3819
3820 data->has_next_tsf = true;
3821 }
3822
3823 if (data->absent)
3824 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3825
3826 data->next_tsf = tsf + next_offset;
3827 }
3828 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3829
ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr * attr,struct ieee80211_noa_data * data,u32 tsf)3830 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3831 struct ieee80211_noa_data *data, u32 tsf)
3832 {
3833 int ret = 0;
3834 int i;
3835
3836 memset(data, 0, sizeof(*data));
3837
3838 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3839 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3840
3841 if (!desc->count || !desc->duration)
3842 continue;
3843
3844 data->count[i] = desc->count;
3845 data->desc[i].start = le32_to_cpu(desc->start_time);
3846 data->desc[i].duration = le32_to_cpu(desc->duration);
3847 data->desc[i].interval = le32_to_cpu(desc->interval);
3848
3849 if (data->count[i] > 1 &&
3850 data->desc[i].interval < data->desc[i].duration)
3851 continue;
3852
3853 ieee80211_extend_noa_desc(data, tsf, i);
3854 ret++;
3855 }
3856
3857 if (ret)
3858 ieee80211_update_p2p_noa(data, tsf);
3859
3860 return ret;
3861 }
3862 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3863
ieee80211_recalc_dtim(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)3864 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3865 struct ieee80211_sub_if_data *sdata)
3866 {
3867 u64 tsf = drv_get_tsf(local, sdata);
3868 u64 dtim_count = 0;
3869 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3870 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3871 struct ps_data *ps;
3872 u8 bcns_from_dtim;
3873
3874 if (tsf == -1ULL || !beacon_int || !dtim_period)
3875 return;
3876
3877 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3878 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3879 if (!sdata->bss)
3880 return;
3881
3882 ps = &sdata->bss->ps;
3883 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3884 ps = &sdata->u.mesh.ps;
3885 } else {
3886 return;
3887 }
3888
3889 /*
3890 * actually finds last dtim_count, mac80211 will update in
3891 * __beacon_add_tim().
3892 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3893 */
3894 do_div(tsf, beacon_int);
3895 bcns_from_dtim = do_div(tsf, dtim_period);
3896 /* just had a DTIM */
3897 if (!bcns_from_dtim)
3898 dtim_count = 0;
3899 else
3900 dtim_count = dtim_period - bcns_from_dtim;
3901
3902 ps->dtim_count = dtim_count;
3903 }
3904
ieee80211_chanctx_radar_detect(struct ieee80211_local * local,struct ieee80211_chanctx * ctx)3905 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3906 struct ieee80211_chanctx *ctx)
3907 {
3908 struct ieee80211_link_data *link;
3909 u8 radar_detect = 0;
3910
3911 lockdep_assert_wiphy(local->hw.wiphy);
3912
3913 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3914 return 0;
3915
3916 list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
3917 if (link->reserved_radar_required)
3918 radar_detect |= BIT(link->reserved.oper.width);
3919
3920 /*
3921 * An in-place reservation context should not have any assigned vifs
3922 * until it replaces the other context.
3923 */
3924 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3925 !list_empty(&ctx->assigned_links));
3926
3927 list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
3928 if (!link->radar_required)
3929 continue;
3930
3931 radar_detect |=
3932 BIT(link->conf->chanreq.oper.width);
3933 }
3934
3935 return radar_detect;
3936 }
3937
ieee80211_check_combinations(struct ieee80211_sub_if_data * sdata,const struct cfg80211_chan_def * chandef,enum ieee80211_chanctx_mode chanmode,u8 radar_detect)3938 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3939 const struct cfg80211_chan_def *chandef,
3940 enum ieee80211_chanctx_mode chanmode,
3941 u8 radar_detect)
3942 {
3943 struct ieee80211_local *local = sdata->local;
3944 struct ieee80211_sub_if_data *sdata_iter;
3945 enum nl80211_iftype iftype = sdata->wdev.iftype;
3946 struct ieee80211_chanctx *ctx;
3947 int total = 1;
3948 struct iface_combination_params params = {
3949 .radar_detect = radar_detect,
3950 };
3951
3952 lockdep_assert_wiphy(local->hw.wiphy);
3953
3954 if (WARN_ON(hweight32(radar_detect) > 1))
3955 return -EINVAL;
3956
3957 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3958 !chandef->chan))
3959 return -EINVAL;
3960
3961 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3962 return -EINVAL;
3963
3964 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3965 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3966 /*
3967 * always passing this is harmless, since it'll be the
3968 * same value that cfg80211 finds if it finds the same
3969 * interface ... and that's always allowed
3970 */
3971 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3972 }
3973
3974 /* Always allow software iftypes */
3975 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3976 if (radar_detect)
3977 return -EINVAL;
3978 return 0;
3979 }
3980
3981 if (chandef)
3982 params.num_different_channels = 1;
3983
3984 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3985 params.iftype_num[iftype] = 1;
3986
3987 list_for_each_entry(ctx, &local->chanctx_list, list) {
3988 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3989 continue;
3990 params.radar_detect |=
3991 ieee80211_chanctx_radar_detect(local, ctx);
3992 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3993 params.num_different_channels++;
3994 continue;
3995 }
3996 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3997 cfg80211_chandef_compatible(chandef,
3998 &ctx->conf.def))
3999 continue;
4000 params.num_different_channels++;
4001 }
4002
4003 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4004 struct wireless_dev *wdev_iter;
4005
4006 wdev_iter = &sdata_iter->wdev;
4007
4008 if (sdata_iter == sdata ||
4009 !ieee80211_sdata_running(sdata_iter) ||
4010 cfg80211_iftype_allowed(local->hw.wiphy,
4011 wdev_iter->iftype, 0, 1))
4012 continue;
4013
4014 params.iftype_num[wdev_iter->iftype]++;
4015 total++;
4016 }
4017
4018 if (total == 1 && !params.radar_detect)
4019 return 0;
4020
4021 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
4022 }
4023
4024 static void
ieee80211_iter_max_chans(const struct ieee80211_iface_combination * c,void * data)4025 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4026 void *data)
4027 {
4028 u32 *max_num_different_channels = data;
4029
4030 *max_num_different_channels = max(*max_num_different_channels,
4031 c->num_different_channels);
4032 }
4033
ieee80211_max_num_channels(struct ieee80211_local * local)4034 int ieee80211_max_num_channels(struct ieee80211_local *local)
4035 {
4036 struct ieee80211_sub_if_data *sdata;
4037 struct ieee80211_chanctx *ctx;
4038 u32 max_num_different_channels = 1;
4039 int err;
4040 struct iface_combination_params params = {0};
4041
4042 lockdep_assert_wiphy(local->hw.wiphy);
4043
4044 list_for_each_entry(ctx, &local->chanctx_list, list) {
4045 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4046 continue;
4047
4048 params.num_different_channels++;
4049
4050 params.radar_detect |=
4051 ieee80211_chanctx_radar_detect(local, ctx);
4052 }
4053
4054 list_for_each_entry_rcu(sdata, &local->interfaces, list)
4055 params.iftype_num[sdata->wdev.iftype]++;
4056
4057 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
4058 ieee80211_iter_max_chans,
4059 &max_num_different_channels);
4060 if (err < 0)
4061 return err;
4062
4063 return max_num_different_channels;
4064 }
4065
ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_s1g_cap * caps,struct sk_buff * skb)4066 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4067 struct ieee80211_sta_s1g_cap *caps,
4068 struct sk_buff *skb)
4069 {
4070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4071 struct ieee80211_s1g_cap s1g_capab;
4072 u8 *pos;
4073 int i;
4074
4075 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4076 return;
4077
4078 if (!caps->s1g)
4079 return;
4080
4081 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4082 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4083
4084 /* override the capability info */
4085 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4086 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4087
4088 s1g_capab.capab_info[i] &= ~mask;
4089 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4090 }
4091
4092 /* then MCS and NSS set */
4093 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4094 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4095
4096 s1g_capab.supp_mcs_nss[i] &= ~mask;
4097 s1g_capab.supp_mcs_nss[i] |=
4098 ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4099 }
4100
4101 pos = skb_put(skb, 2 + sizeof(s1g_capab));
4102 *pos++ = WLAN_EID_S1G_CAPABILITIES;
4103 *pos++ = sizeof(s1g_capab);
4104
4105 memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4106 }
4107
ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)4108 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4109 struct sk_buff *skb)
4110 {
4111 u8 *pos = skb_put(skb, 3);
4112
4113 *pos++ = WLAN_EID_AID_REQUEST;
4114 *pos++ = 1;
4115 *pos++ = 0;
4116 }
4117
ieee80211_add_wmm_info_ie(u8 * buf,u8 qosinfo)4118 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4119 {
4120 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4121 *buf++ = 7; /* len */
4122 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4123 *buf++ = 0x50;
4124 *buf++ = 0xf2;
4125 *buf++ = 2; /* WME */
4126 *buf++ = 0; /* WME info */
4127 *buf++ = 1; /* WME ver */
4128 *buf++ = qosinfo; /* U-APSD no in use */
4129
4130 return buf;
4131 }
4132
ieee80211_txq_get_depth(struct ieee80211_txq * txq,unsigned long * frame_cnt,unsigned long * byte_cnt)4133 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4134 unsigned long *frame_cnt,
4135 unsigned long *byte_cnt)
4136 {
4137 struct txq_info *txqi = to_txq_info(txq);
4138 u32 frag_cnt = 0, frag_bytes = 0;
4139 struct sk_buff *skb;
4140
4141 skb_queue_walk(&txqi->frags, skb) {
4142 frag_cnt++;
4143 frag_bytes += skb->len;
4144 }
4145
4146 if (frame_cnt)
4147 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4148
4149 if (byte_cnt)
4150 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4151 }
4152 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4153
4154 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4155 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4156 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4157 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4158 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4159 };
4160
ieee80211_encode_usf(int listen_interval)4161 u16 ieee80211_encode_usf(int listen_interval)
4162 {
4163 static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4164 u16 ui, usf = 0;
4165
4166 /* find greatest USF */
4167 while (usf < IEEE80211_MAX_USF) {
4168 if (listen_interval % listen_int_usf[usf + 1])
4169 break;
4170 usf += 1;
4171 }
4172 ui = listen_interval / listen_int_usf[usf];
4173
4174 /* error if there is a remainder. Should've been checked by user */
4175 WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4176 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4177 FIELD_PREP(LISTEN_INT_UI, ui);
4178
4179 return (u16) listen_interval;
4180 }
4181
4182 /* this may return more than ieee80211_put_eht_cap() will need */
ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data * sdata)4183 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata)
4184 {
4185 const struct ieee80211_sta_he_cap *he_cap;
4186 const struct ieee80211_sta_eht_cap *eht_cap;
4187 struct ieee80211_supported_band *sband;
4188 bool is_ap;
4189 u8 n;
4190
4191 sband = ieee80211_get_sband(sdata);
4192 if (!sband)
4193 return 0;
4194
4195 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4196 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4197 if (!he_cap || !eht_cap)
4198 return 0;
4199
4200 is_ap = sdata->vif.type == NL80211_IFTYPE_AP;
4201
4202 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4203 &eht_cap->eht_cap_elem,
4204 is_ap);
4205 return 2 + 1 +
4206 sizeof(eht_cap->eht_cap_elem) + n +
4207 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4208 eht_cap->eht_cap_elem.phy_cap_info);
4209 return 0;
4210 }
4211
ieee80211_put_eht_cap(struct sk_buff * skb,struct ieee80211_sub_if_data * sdata,const struct ieee80211_supported_band * sband,const struct ieee80211_conn_settings * conn)4212 int ieee80211_put_eht_cap(struct sk_buff *skb,
4213 struct ieee80211_sub_if_data *sdata,
4214 const struct ieee80211_supported_band *sband,
4215 const struct ieee80211_conn_settings *conn)
4216 {
4217 const struct ieee80211_sta_he_cap *he_cap =
4218 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4219 const struct ieee80211_sta_eht_cap *eht_cap =
4220 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4221 bool for_ap = sdata->vif.type == NL80211_IFTYPE_AP;
4222 struct ieee80211_eht_cap_elem_fixed fixed;
4223 struct ieee80211_he_cap_elem he;
4224 u8 mcs_nss_len, ppet_len;
4225 u8 orig_mcs_nss_len;
4226 u8 ie_len;
4227
4228 if (!conn)
4229 conn = &ieee80211_conn_settings_unlimited;
4230
4231 /* Make sure we have place for the IE */
4232 if (!he_cap || !eht_cap)
4233 return 0;
4234
4235 orig_mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4236 &eht_cap->eht_cap_elem,
4237 for_ap);
4238
4239 ieee80211_get_adjusted_he_cap(conn, he_cap, &he);
4240
4241 fixed = eht_cap->eht_cap_elem;
4242
4243 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_80)
4244 fixed.phy_cap_info[6] &=
4245 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ;
4246
4247 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
4248 fixed.phy_cap_info[1] &=
4249 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_160MHZ_MASK;
4250 fixed.phy_cap_info[2] &=
4251 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_160MHZ_MASK;
4252 fixed.phy_cap_info[6] &=
4253 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ;
4254 }
4255
4256 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320) {
4257 fixed.phy_cap_info[0] &=
4258 ~IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
4259 fixed.phy_cap_info[1] &=
4260 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_320MHZ_MASK;
4261 fixed.phy_cap_info[2] &=
4262 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_320MHZ_MASK;
4263 fixed.phy_cap_info[6] &=
4264 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ;
4265 }
4266
4267 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20)
4268 fixed.phy_cap_info[0] &=
4269 ~IEEE80211_EHT_PHY_CAP0_242_TONE_RU_GT20MHZ;
4270
4271 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he, &fixed, for_ap);
4272 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4273 fixed.phy_cap_info);
4274
4275 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4276 if (skb_tailroom(skb) < ie_len)
4277 return -ENOBUFS;
4278
4279 skb_put_u8(skb, WLAN_EID_EXTENSION);
4280 skb_put_u8(skb, ie_len - 2);
4281 skb_put_u8(skb, WLAN_EID_EXT_EHT_CAPABILITY);
4282 skb_put_data(skb, &fixed, sizeof(fixed));
4283
4284 if (mcs_nss_len == 4 && orig_mcs_nss_len != 4) {
4285 /*
4286 * If the (non-AP) STA became 20 MHz only, then convert from
4287 * <=80 to 20-MHz-only format, where MCSes are indicated in
4288 * the groups 0-7, 8-9, 10-11, 12-13 rather than just 0-9,
4289 * 10-11, 12-13. Thus, use 0-9 for 0-7 and 8-9.
4290 */
4291 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
4292 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
4293 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs11_max_nss);
4294 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs13_max_nss);
4295 } else {
4296 skb_put_data(skb, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4297 }
4298
4299 if (ppet_len)
4300 skb_put_data(skb, &eht_cap->eht_ppe_thres, ppet_len);
4301
4302 return 0;
4303 }
4304
ieee80211_conn_mode_str(enum ieee80211_conn_mode mode)4305 const char *ieee80211_conn_mode_str(enum ieee80211_conn_mode mode)
4306 {
4307 static const char * const modes[] = {
4308 [IEEE80211_CONN_MODE_S1G] = "S1G",
4309 [IEEE80211_CONN_MODE_LEGACY] = "legacy",
4310 [IEEE80211_CONN_MODE_HT] = "HT",
4311 [IEEE80211_CONN_MODE_VHT] = "VHT",
4312 [IEEE80211_CONN_MODE_HE] = "HE",
4313 [IEEE80211_CONN_MODE_EHT] = "EHT",
4314 };
4315
4316 if (WARN_ON(mode >= ARRAY_SIZE(modes)))
4317 return "<out of range>";
4318
4319 return modes[mode] ?: "<missing string>";
4320 }
4321
4322 enum ieee80211_conn_bw_limit
ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def * chandef)4323 ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def *chandef)
4324 {
4325 switch (chandef->width) {
4326 case NL80211_CHAN_WIDTH_20_NOHT:
4327 case NL80211_CHAN_WIDTH_20:
4328 return IEEE80211_CONN_BW_LIMIT_20;
4329 case NL80211_CHAN_WIDTH_40:
4330 return IEEE80211_CONN_BW_LIMIT_40;
4331 case NL80211_CHAN_WIDTH_80:
4332 return IEEE80211_CONN_BW_LIMIT_80;
4333 case NL80211_CHAN_WIDTH_80P80:
4334 case NL80211_CHAN_WIDTH_160:
4335 return IEEE80211_CONN_BW_LIMIT_160;
4336 case NL80211_CHAN_WIDTH_320:
4337 return IEEE80211_CONN_BW_LIMIT_320;
4338 default:
4339 WARN(1, "unhandled chandef width %d\n", chandef->width);
4340 return IEEE80211_CONN_BW_LIMIT_20;
4341 }
4342 }
4343