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17#include <net/mac80211.h>
18#include <linux/netdevice.h>
19#include <linux/export.h>
20#include <linux/types.h>
21#include <linux/slab.h>
22#include <linux/skbuff.h>
23#include <linux/etherdevice.h>
24#include <linux/if_arp.h>
25#include <linux/bitmap.h>
26#include <linux/crc32.h>
27#include <net/net_namespace.h>
28#include <net/cfg80211.h>
29#include <net/rtnetlink.h>
30
31#include "ieee80211_i.h"
32#include "driver-ops.h"
33#include "rate.h"
34#include "mesh.h"
35#include "wme.h"
36#include "led.h"
37#include "wep.h"
38
39
40const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41
42struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43{
44 struct ieee80211_local *local;
45 BUG_ON(!wiphy);
46
47 local = wiphy_priv(wiphy);
48 return &local->hw;
49}
50EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51
52void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
53{
54 struct sk_buff *skb;
55 struct ieee80211_hdr *hdr;
56
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
60 }
61}
62
63int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
65 int shift)
66{
67 int dur;
68
69
70
71
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74
75
76
77
78
79
80
81 if (band == NL80211_BAND_5GHZ || erp) {
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91
92
93
94
95 dur = 16;
96 dur += 16;
97 dur += 4;
98
99
100
101
102
103 dur *= 1 << shift;
104
105
106
107
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate);
110 } else {
111
112
113
114
115
116
117
118
119
120
121 dur = 10;
122 dur += short_preamble ? (72 + 24) : (144 + 48);
123
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
125 }
126
127 return dur;
128}
129
130
131__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
134 size_t frame_len,
135 struct ieee80211_rate *rate)
136{
137 struct ieee80211_sub_if_data *sdata;
138 u16 dur;
139 int erp, shift = 0;
140 bool short_preamble = false;
141
142 erp = 0;
143 if (vif) {
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
149 }
150
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
153
154 return cpu_to_le16(dur);
155}
156EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157
158__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
161{
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
165 bool short_preamble;
166 int erp, shift = 0, bitrate;
167 u16 dur;
168 struct ieee80211_supported_band *sband;
169
170 sband = local->hw.wiphy->bands[frame_txctl->band];
171
172 short_preamble = false;
173
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
175
176 erp = 0;
177 if (vif) {
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
183 }
184
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
186
187
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
193
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
196
197 return cpu_to_le16(dur);
198}
199EXPORT_SYMBOL(ieee80211_rts_duration);
200
201__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
203 size_t frame_len,
204 const struct ieee80211_tx_info *frame_txctl)
205{
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
209 bool short_preamble;
210 int erp, shift = 0, bitrate;
211 u16 dur;
212 struct ieee80211_supported_band *sband;
213
214 sband = local->hw.wiphy->bands[frame_txctl->band];
215
216 short_preamble = false;
217
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
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->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
226 }
227
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229
230
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 }
238
239 return cpu_to_le16(dur);
240}
241EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242
243void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
244{
245 struct ieee80211_sub_if_data *sdata;
246 int n_acs = IEEE80211_NUM_ACS;
247
248 if (local->ops->wake_tx_queue)
249 return;
250
251 if (local->hw.queues < IEEE80211_NUM_ACS)
252 n_acs = 1;
253
254 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
255 int ac;
256
257 if (!sdata->dev)
258 continue;
259
260 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
261 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
262 continue;
263
264 for (ac = 0; ac < n_acs; ac++) {
265 int ac_queue = sdata->vif.hw_queue[ac];
266
267 if (ac_queue == queue ||
268 (sdata->vif.cab_queue == queue &&
269 local->queue_stop_reasons[ac_queue] == 0 &&
270 skb_queue_empty(&local->pending[ac_queue])))
271 netif_wake_subqueue(sdata->dev, ac);
272 }
273 }
274}
275
276static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
277 enum queue_stop_reason reason,
278 bool refcounted)
279{
280 struct ieee80211_local *local = hw_to_local(hw);
281
282 trace_wake_queue(local, queue, reason);
283
284 if (WARN_ON(queue >= hw->queues))
285 return;
286
287 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
288 return;
289
290 if (!refcounted) {
291 local->q_stop_reasons[queue][reason] = 0;
292 } else {
293 local->q_stop_reasons[queue][reason]--;
294 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
295 local->q_stop_reasons[queue][reason] = 0;
296 }
297
298 if (local->q_stop_reasons[queue][reason] == 0)
299 __clear_bit(reason, &local->queue_stop_reasons[queue]);
300
301 if (local->queue_stop_reasons[queue] != 0)
302
303 return;
304
305 if (skb_queue_empty(&local->pending[queue])) {
306 rcu_read_lock();
307 ieee80211_propagate_queue_wake(local, queue);
308 rcu_read_unlock();
309 } else
310 tasklet_schedule(&local->tx_pending_tasklet);
311}
312
313void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
314 enum queue_stop_reason reason,
315 bool refcounted)
316{
317 struct ieee80211_local *local = hw_to_local(hw);
318 unsigned long flags;
319
320 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
321 __ieee80211_wake_queue(hw, queue, reason, refcounted);
322 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
323}
324
325void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
326{
327 ieee80211_wake_queue_by_reason(hw, queue,
328 IEEE80211_QUEUE_STOP_REASON_DRIVER,
329 false);
330}
331EXPORT_SYMBOL(ieee80211_wake_queue);
332
333static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason,
335 bool refcounted)
336{
337 struct ieee80211_local *local = hw_to_local(hw);
338 struct ieee80211_sub_if_data *sdata;
339 int n_acs = IEEE80211_NUM_ACS;
340
341 trace_stop_queue(local, queue, reason);
342
343 if (WARN_ON(queue >= hw->queues))
344 return;
345
346 if (!refcounted)
347 local->q_stop_reasons[queue][reason] = 1;
348 else
349 local->q_stop_reasons[queue][reason]++;
350
351 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
352 return;
353
354 if (local->ops->wake_tx_queue)
355 return;
356
357 if (local->hw.queues < IEEE80211_NUM_ACS)
358 n_acs = 1;
359
360 rcu_read_lock();
361 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
362 int ac;
363
364 if (!sdata->dev)
365 continue;
366
367 for (ac = 0; ac < n_acs; ac++) {
368 if (sdata->vif.hw_queue[ac] == queue ||
369 sdata->vif.cab_queue == queue)
370 netif_stop_subqueue(sdata->dev, ac);
371 }
372 }
373 rcu_read_unlock();
374}
375
376void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
377 enum queue_stop_reason reason,
378 bool refcounted)
379{
380 struct ieee80211_local *local = hw_to_local(hw);
381 unsigned long flags;
382
383 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
384 __ieee80211_stop_queue(hw, queue, reason, refcounted);
385 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
386}
387
388void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
389{
390 ieee80211_stop_queue_by_reason(hw, queue,
391 IEEE80211_QUEUE_STOP_REASON_DRIVER,
392 false);
393}
394EXPORT_SYMBOL(ieee80211_stop_queue);
395
396void ieee80211_add_pending_skb(struct ieee80211_local *local,
397 struct sk_buff *skb)
398{
399 struct ieee80211_hw *hw = &local->hw;
400 unsigned long flags;
401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
402 int queue = info->hw_queue;
403
404 if (WARN_ON(!info->control.vif)) {
405 ieee80211_free_txskb(&local->hw, skb);
406 return;
407 }
408
409 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
410 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
411 false);
412 __skb_queue_tail(&local->pending[queue], skb);
413 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
414 false);
415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
416}
417
418void ieee80211_add_pending_skbs(struct ieee80211_local *local,
419 struct sk_buff_head *skbs)
420{
421 struct ieee80211_hw *hw = &local->hw;
422 struct sk_buff *skb;
423 unsigned long flags;
424 int queue, i;
425
426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
427 while ((skb = skb_dequeue(skbs))) {
428 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
429
430 if (WARN_ON(!info->control.vif)) {
431 ieee80211_free_txskb(&local->hw, skb);
432 continue;
433 }
434
435 queue = info->hw_queue;
436
437 __ieee80211_stop_queue(hw, queue,
438 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
439 false);
440
441 __skb_queue_tail(&local->pending[queue], skb);
442 }
443
444 for (i = 0; i < hw->queues; i++)
445 __ieee80211_wake_queue(hw, i,
446 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
447 false);
448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449}
450
451void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
452 unsigned long queues,
453 enum queue_stop_reason reason,
454 bool refcounted)
455{
456 struct ieee80211_local *local = hw_to_local(hw);
457 unsigned long flags;
458 int i;
459
460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
461
462 for_each_set_bit(i, &queues, hw->queues)
463 __ieee80211_stop_queue(hw, i, reason, refcounted);
464
465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
466}
467
468void ieee80211_stop_queues(struct ieee80211_hw *hw)
469{
470 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
471 IEEE80211_QUEUE_STOP_REASON_DRIVER,
472 false);
473}
474EXPORT_SYMBOL(ieee80211_stop_queues);
475
476int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
477{
478 struct ieee80211_local *local = hw_to_local(hw);
479 unsigned long flags;
480 int ret;
481
482 if (WARN_ON(queue >= hw->queues))
483 return true;
484
485 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
486 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
487 &local->queue_stop_reasons[queue]);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 return ret;
490}
491EXPORT_SYMBOL(ieee80211_queue_stopped);
492
493void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 unsigned long queues,
495 enum queue_stop_reason reason,
496 bool refcounted)
497{
498 struct ieee80211_local *local = hw_to_local(hw);
499 unsigned long flags;
500 int i;
501
502 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
503
504 for_each_set_bit(i, &queues, hw->queues)
505 __ieee80211_wake_queue(hw, i, reason, refcounted);
506
507 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
508}
509
510void ieee80211_wake_queues(struct ieee80211_hw *hw)
511{
512 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
513 IEEE80211_QUEUE_STOP_REASON_DRIVER,
514 false);
515}
516EXPORT_SYMBOL(ieee80211_wake_queues);
517
518static unsigned int
519ieee80211_get_vif_queues(struct ieee80211_local *local,
520 struct ieee80211_sub_if_data *sdata)
521{
522 unsigned int queues;
523
524 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
525 int ac;
526
527 queues = 0;
528
529 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
530 queues |= BIT(sdata->vif.hw_queue[ac]);
531 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
532 queues |= BIT(sdata->vif.cab_queue);
533 } else {
534
535 queues = BIT(local->hw.queues) - 1;
536 }
537
538 return queues;
539}
540
541void __ieee80211_flush_queues(struct ieee80211_local *local,
542 struct ieee80211_sub_if_data *sdata,
543 unsigned int queues, bool drop)
544{
545 if (!local->ops->flush)
546 return;
547
548
549
550
551
552 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
553 queues = ieee80211_get_vif_queues(local, sdata);
554
555 ieee80211_stop_queues_by_reason(&local->hw, queues,
556 IEEE80211_QUEUE_STOP_REASON_FLUSH,
557 false);
558
559 drv_flush(local, sdata, queues, drop);
560
561 ieee80211_wake_queues_by_reason(&local->hw, queues,
562 IEEE80211_QUEUE_STOP_REASON_FLUSH,
563 false);
564}
565
566void ieee80211_flush_queues(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata, bool drop)
568{
569 __ieee80211_flush_queues(local, sdata, 0, drop);
570}
571
572void ieee80211_stop_vif_queues(struct ieee80211_local *local,
573 struct ieee80211_sub_if_data *sdata,
574 enum queue_stop_reason reason)
575{
576 ieee80211_stop_queues_by_reason(&local->hw,
577 ieee80211_get_vif_queues(local, sdata),
578 reason, true);
579}
580
581void ieee80211_wake_vif_queues(struct ieee80211_local *local,
582 struct ieee80211_sub_if_data *sdata,
583 enum queue_stop_reason reason)
584{
585 ieee80211_wake_queues_by_reason(&local->hw,
586 ieee80211_get_vif_queues(local, sdata),
587 reason, true);
588}
589
590static void __iterate_interfaces(struct ieee80211_local *local,
591 u32 iter_flags,
592 void (*iterator)(void *data, u8 *mac,
593 struct ieee80211_vif *vif),
594 void *data)
595{
596 struct ieee80211_sub_if_data *sdata;
597 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
598
599 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
600 switch (sdata->vif.type) {
601 case NL80211_IFTYPE_MONITOR:
602 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
603 continue;
604 break;
605 case NL80211_IFTYPE_AP_VLAN:
606 continue;
607 default:
608 break;
609 }
610 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
611 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
612 continue;
613 if (ieee80211_sdata_running(sdata) || !active_only)
614 iterator(data, sdata->vif.addr,
615 &sdata->vif);
616 }
617
618 sdata = rcu_dereference_check(local->monitor_sdata,
619 lockdep_is_held(&local->iflist_mtx) ||
620 lockdep_rtnl_is_held());
621 if (sdata &&
622 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
623 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
624 iterator(data, sdata->vif.addr, &sdata->vif);
625}
626
627void ieee80211_iterate_interfaces(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
631 void *data)
632{
633 struct ieee80211_local *local = hw_to_local(hw);
634
635 mutex_lock(&local->iflist_mtx);
636 __iterate_interfaces(local, iter_flags, iterator, data);
637 mutex_unlock(&local->iflist_mtx);
638}
639EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
640
641void ieee80211_iterate_active_interfaces_atomic(
642 struct ieee80211_hw *hw, u32 iter_flags,
643 void (*iterator)(void *data, u8 *mac,
644 struct ieee80211_vif *vif),
645 void *data)
646{
647 struct ieee80211_local *local = hw_to_local(hw);
648
649 rcu_read_lock();
650 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
651 iterator, data);
652 rcu_read_unlock();
653}
654EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
655
656void ieee80211_iterate_active_interfaces_rtnl(
657 struct ieee80211_hw *hw, u32 iter_flags,
658 void (*iterator)(void *data, u8 *mac,
659 struct ieee80211_vif *vif),
660 void *data)
661{
662 struct ieee80211_local *local = hw_to_local(hw);
663
664 ASSERT_RTNL();
665
666 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
667 iterator, data);
668}
669EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
670
671static void __iterate_stations(struct ieee80211_local *local,
672 void (*iterator)(void *data,
673 struct ieee80211_sta *sta),
674 void *data)
675{
676 struct sta_info *sta;
677
678 list_for_each_entry_rcu(sta, &local->sta_list, list) {
679 if (!sta->uploaded)
680 continue;
681
682 iterator(data, &sta->sta);
683 }
684}
685
686void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
687 void (*iterator)(void *data,
688 struct ieee80211_sta *sta),
689 void *data)
690{
691 struct ieee80211_local *local = hw_to_local(hw);
692
693 rcu_read_lock();
694 __iterate_stations(local, iterator, data);
695 rcu_read_unlock();
696}
697EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
698
699struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
700{
701 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
702
703 if (!ieee80211_sdata_running(sdata) ||
704 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
705 return NULL;
706 return &sdata->vif;
707}
708EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
709
710struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
711{
712 struct ieee80211_sub_if_data *sdata;
713
714 if (!vif)
715 return NULL;
716
717 sdata = vif_to_sdata(vif);
718
719 if (!ieee80211_sdata_running(sdata) ||
720 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
721 return NULL;
722
723 return &sdata->wdev;
724}
725EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
726
727
728
729
730
731
732
733
734
735
736static bool ieee80211_can_queue_work(struct ieee80211_local *local)
737{
738 if (local->quiescing || (local->suspended && !local->resuming)) {
739 pr_warn("queueing ieee80211 work while going to suspend\n");
740 return false;
741 }
742
743 return true;
744}
745
746void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
747{
748 struct ieee80211_local *local = hw_to_local(hw);
749
750 if (!ieee80211_can_queue_work(local))
751 return;
752
753 queue_work(local->workqueue, work);
754}
755EXPORT_SYMBOL(ieee80211_queue_work);
756
757void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
758 struct delayed_work *dwork,
759 unsigned long delay)
760{
761 struct ieee80211_local *local = hw_to_local(hw);
762
763 if (!ieee80211_can_queue_work(local))
764 return;
765
766 queue_delayed_work(local->workqueue, dwork, delay);
767}
768EXPORT_SYMBOL(ieee80211_queue_delayed_work);
769
770u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
771 struct ieee802_11_elems *elems,
772 u64 filter, u32 crc)
773{
774 size_t left = len;
775 const u8 *pos = start;
776 bool calc_crc = filter != 0;
777 DECLARE_BITMAP(seen_elems, 256);
778 const u8 *ie;
779
780 bitmap_zero(seen_elems, 256);
781 memset(elems, 0, sizeof(*elems));
782 elems->ie_start = start;
783 elems->total_len = len;
784
785 while (left >= 2) {
786 u8 id, elen;
787 bool elem_parse_failed;
788
789 id = *pos++;
790 elen = *pos++;
791 left -= 2;
792
793 if (elen > left) {
794 elems->parse_error = true;
795 break;
796 }
797
798 switch (id) {
799 case WLAN_EID_SSID:
800 case WLAN_EID_SUPP_RATES:
801 case WLAN_EID_FH_PARAMS:
802 case WLAN_EID_DS_PARAMS:
803 case WLAN_EID_CF_PARAMS:
804 case WLAN_EID_TIM:
805 case WLAN_EID_IBSS_PARAMS:
806 case WLAN_EID_CHALLENGE:
807 case WLAN_EID_RSN:
808 case WLAN_EID_ERP_INFO:
809 case WLAN_EID_EXT_SUPP_RATES:
810 case WLAN_EID_HT_CAPABILITY:
811 case WLAN_EID_HT_OPERATION:
812 case WLAN_EID_VHT_CAPABILITY:
813 case WLAN_EID_VHT_OPERATION:
814 case WLAN_EID_MESH_ID:
815 case WLAN_EID_MESH_CONFIG:
816 case WLAN_EID_PEER_MGMT:
817 case WLAN_EID_PREQ:
818 case WLAN_EID_PREP:
819 case WLAN_EID_PERR:
820 case WLAN_EID_RANN:
821 case WLAN_EID_CHANNEL_SWITCH:
822 case WLAN_EID_EXT_CHANSWITCH_ANN:
823 case WLAN_EID_COUNTRY:
824 case WLAN_EID_PWR_CONSTRAINT:
825 case WLAN_EID_TIMEOUT_INTERVAL:
826 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
827 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
828 case WLAN_EID_CHAN_SWITCH_PARAM:
829 case WLAN_EID_EXT_CAPABILITY:
830 case WLAN_EID_CHAN_SWITCH_TIMING:
831 case WLAN_EID_LINK_ID:
832 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
833
834
835
836
837 if (test_bit(id, seen_elems)) {
838 elems->parse_error = true;
839 left -= elen;
840 pos += elen;
841 continue;
842 }
843 break;
844 }
845
846 if (calc_crc && id < 64 && (filter & (1ULL << id)))
847 crc = crc32_be(crc, pos - 2, elen + 2);
848
849 elem_parse_failed = false;
850
851 switch (id) {
852 case WLAN_EID_LINK_ID:
853 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
854 elem_parse_failed = true;
855 break;
856 }
857 elems->lnk_id = (void *)(pos - 2);
858 break;
859 case WLAN_EID_CHAN_SWITCH_TIMING:
860 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
861 elem_parse_failed = true;
862 break;
863 }
864 elems->ch_sw_timing = (void *)pos;
865 break;
866 case WLAN_EID_EXT_CAPABILITY:
867 elems->ext_capab = pos;
868 elems->ext_capab_len = elen;
869 break;
870 case WLAN_EID_SSID:
871 elems->ssid = pos;
872 elems->ssid_len = elen;
873 break;
874 case WLAN_EID_SUPP_RATES:
875 elems->supp_rates = pos;
876 elems->supp_rates_len = elen;
877 break;
878 case WLAN_EID_DS_PARAMS:
879 if (elen >= 1)
880 elems->ds_params = pos;
881 else
882 elem_parse_failed = true;
883 break;
884 case WLAN_EID_TIM:
885 if (elen >= sizeof(struct ieee80211_tim_ie)) {
886 elems->tim = (void *)pos;
887 elems->tim_len = elen;
888 } else
889 elem_parse_failed = true;
890 break;
891 case WLAN_EID_CHALLENGE:
892 elems->challenge = pos;
893 elems->challenge_len = elen;
894 break;
895 case WLAN_EID_VENDOR_SPECIFIC:
896 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
897 pos[2] == 0xf2) {
898
899
900 if (calc_crc)
901 crc = crc32_be(crc, pos - 2, elen + 2);
902
903 if (elen >= 5 && pos[3] == 2) {
904
905 if (pos[4] == 0) {
906 elems->wmm_info = pos;
907 elems->wmm_info_len = elen;
908 } else if (pos[4] == 1) {
909 elems->wmm_param = pos;
910 elems->wmm_param_len = elen;
911 }
912 }
913 }
914 break;
915 case WLAN_EID_RSN:
916 elems->rsn = pos;
917 elems->rsn_len = elen;
918 break;
919 case WLAN_EID_ERP_INFO:
920 if (elen >= 1)
921 elems->erp_info = pos;
922 else
923 elem_parse_failed = true;
924 break;
925 case WLAN_EID_EXT_SUPP_RATES:
926 elems->ext_supp_rates = pos;
927 elems->ext_supp_rates_len = elen;
928 break;
929 case WLAN_EID_HT_CAPABILITY:
930 if (elen >= sizeof(struct ieee80211_ht_cap))
931 elems->ht_cap_elem = (void *)pos;
932 else
933 elem_parse_failed = true;
934 break;
935 case WLAN_EID_HT_OPERATION:
936 if (elen >= sizeof(struct ieee80211_ht_operation))
937 elems->ht_operation = (void *)pos;
938 else
939 elem_parse_failed = true;
940 break;
941 case WLAN_EID_VHT_CAPABILITY:
942 if (elen >= sizeof(struct ieee80211_vht_cap))
943 elems->vht_cap_elem = (void *)pos;
944 else
945 elem_parse_failed = true;
946 break;
947 case WLAN_EID_VHT_OPERATION:
948 if (elen >= sizeof(struct ieee80211_vht_operation))
949 elems->vht_operation = (void *)pos;
950 else
951 elem_parse_failed = true;
952 break;
953 case WLAN_EID_OPMODE_NOTIF:
954 if (elen > 0)
955 elems->opmode_notif = pos;
956 else
957 elem_parse_failed = true;
958 break;
959 case WLAN_EID_MESH_ID:
960 elems->mesh_id = pos;
961 elems->mesh_id_len = elen;
962 break;
963 case WLAN_EID_MESH_CONFIG:
964 if (elen >= sizeof(struct ieee80211_meshconf_ie))
965 elems->mesh_config = (void *)pos;
966 else
967 elem_parse_failed = true;
968 break;
969 case WLAN_EID_PEER_MGMT:
970 elems->peering = pos;
971 elems->peering_len = elen;
972 break;
973 case WLAN_EID_MESH_AWAKE_WINDOW:
974 if (elen >= 2)
975 elems->awake_window = (void *)pos;
976 break;
977 case WLAN_EID_PREQ:
978 elems->preq = pos;
979 elems->preq_len = elen;
980 break;
981 case WLAN_EID_PREP:
982 elems->prep = pos;
983 elems->prep_len = elen;
984 break;
985 case WLAN_EID_PERR:
986 elems->perr = pos;
987 elems->perr_len = elen;
988 break;
989 case WLAN_EID_RANN:
990 if (elen >= sizeof(struct ieee80211_rann_ie))
991 elems->rann = (void *)pos;
992 else
993 elem_parse_failed = true;
994 break;
995 case WLAN_EID_CHANNEL_SWITCH:
996 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
997 elem_parse_failed = true;
998 break;
999 }
1000 elems->ch_switch_ie = (void *)pos;
1001 break;
1002 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004 elem_parse_failed = true;
1005 break;
1006 }
1007 elems->ext_chansw_ie = (void *)pos;
1008 break;
1009 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011 elem_parse_failed = true;
1012 break;
1013 }
1014 elems->sec_chan_offs = (void *)pos;
1015 break;
1016 case WLAN_EID_CHAN_SWITCH_PARAM:
1017 if (elen !=
1018 sizeof(*elems->mesh_chansw_params_ie)) {
1019 elem_parse_failed = true;
1020 break;
1021 }
1022 elems->mesh_chansw_params_ie = (void *)pos;
1023 break;
1024 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1025 if (!action ||
1026 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027 elem_parse_failed = true;
1028 break;
1029 }
1030 elems->wide_bw_chansw_ie = (void *)pos;
1031 break;
1032 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1033 if (action) {
1034 elem_parse_failed = true;
1035 break;
1036 }
1037
1038
1039
1040
1041
1042 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1043 pos, elen);
1044 if (ie) {
1045 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046 elems->wide_bw_chansw_ie =
1047 (void *)(ie + 2);
1048 else
1049 elem_parse_failed = true;
1050 }
1051 break;
1052 case WLAN_EID_COUNTRY:
1053 elems->country_elem = pos;
1054 elems->country_elem_len = elen;
1055 break;
1056 case WLAN_EID_PWR_CONSTRAINT:
1057 if (elen != 1) {
1058 elem_parse_failed = true;
1059 break;
1060 }
1061 elems->pwr_constr_elem = pos;
1062 break;
1063 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064
1065
1066
1067
1068
1069 if (elen < 4) {
1070 elem_parse_failed = true;
1071 break;
1072 }
1073
1074 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075 pos[2] != 0x96 || pos[3] != 0x00)
1076 break;
1077
1078 if (elen != 6) {
1079 elem_parse_failed = true;
1080 break;
1081 }
1082
1083 if (calc_crc)
1084 crc = crc32_be(crc, pos - 2, elen + 2);
1085
1086 elems->cisco_dtpc_elem = pos;
1087 break;
1088 case WLAN_EID_TIMEOUT_INTERVAL:
1089 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090 elems->timeout_int = (void *)pos;
1091 else
1092 elem_parse_failed = true;
1093 break;
1094 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1095 if (elen >= sizeof(*elems->max_idle_period_ie))
1096 elems->max_idle_period_ie = (void *)pos;
1097 break;
1098 default:
1099 break;
1100 }
1101
1102 if (elem_parse_failed)
1103 elems->parse_error = true;
1104 else
1105 __set_bit(id, seen_elems);
1106
1107 left -= elen;
1108 pos += elen;
1109 }
1110
1111 if (left != 0)
1112 elems->parse_error = true;
1113
1114 return crc;
1115}
1116
1117void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1118 struct ieee80211_tx_queue_params
1119 *qparam, int ac)
1120{
1121 struct ieee80211_chanctx_conf *chanctx_conf;
1122 const struct ieee80211_reg_rule *rrule;
1123 struct ieee80211_wmm_ac *wmm_ac;
1124 u16 center_freq = 0;
1125
1126 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1127 sdata->vif.type != NL80211_IFTYPE_STATION)
1128 return;
1129
1130 rcu_read_lock();
1131 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1132 if (chanctx_conf)
1133 center_freq = chanctx_conf->def.chan->center_freq;
1134
1135 if (!center_freq) {
1136 rcu_read_unlock();
1137 return;
1138 }
1139
1140 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1141
1142 if (IS_ERR_OR_NULL(rrule) || !rrule->wmm_rule) {
1143 rcu_read_unlock();
1144 return;
1145 }
1146
1147 if (sdata->vif.type == NL80211_IFTYPE_AP)
1148 wmm_ac = &rrule->wmm_rule->ap[ac];
1149 else
1150 wmm_ac = &rrule->wmm_rule->client[ac];
1151 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1152 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1153 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1154 qparam->txop = !qparam->txop ? wmm_ac->cot / 32 :
1155 min_t(u16, qparam->txop, wmm_ac->cot / 32);
1156 rcu_read_unlock();
1157}
1158
1159void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1160 bool bss_notify, bool enable_qos)
1161{
1162 struct ieee80211_local *local = sdata->local;
1163 struct ieee80211_tx_queue_params qparam;
1164 struct ieee80211_chanctx_conf *chanctx_conf;
1165 int ac;
1166 bool use_11b;
1167 bool is_ocb;
1168 int aCWmin, aCWmax;
1169
1170 if (!local->ops->conf_tx)
1171 return;
1172
1173 if (local->hw.queues < IEEE80211_NUM_ACS)
1174 return;
1175
1176 memset(&qparam, 0, sizeof(qparam));
1177
1178 rcu_read_lock();
1179 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1180 use_11b = (chanctx_conf &&
1181 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1182 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1183 rcu_read_unlock();
1184
1185 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1186
1187
1188 aCWmax = 1023;
1189 if (use_11b)
1190 aCWmin = 31;
1191 else
1192 aCWmin = 15;
1193
1194
1195 qparam.cw_max = aCWmax;
1196 qparam.cw_min = aCWmin;
1197 qparam.txop = 0;
1198 qparam.aifs = 2;
1199
1200 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1201
1202 if (enable_qos) {
1203 switch (ac) {
1204 case IEEE80211_AC_BK:
1205 qparam.cw_max = aCWmax;
1206 qparam.cw_min = aCWmin;
1207 qparam.txop = 0;
1208 if (is_ocb)
1209 qparam.aifs = 9;
1210 else
1211 qparam.aifs = 7;
1212 break;
1213
1214 default:
1215 case IEEE80211_AC_BE:
1216 qparam.cw_max = aCWmax;
1217 qparam.cw_min = aCWmin;
1218 qparam.txop = 0;
1219 if (is_ocb)
1220 qparam.aifs = 6;
1221 else
1222 qparam.aifs = 3;
1223 break;
1224 case IEEE80211_AC_VI:
1225 qparam.cw_max = aCWmin;
1226 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1227 if (is_ocb)
1228 qparam.txop = 0;
1229 else if (use_11b)
1230 qparam.txop = 6016/32;
1231 else
1232 qparam.txop = 3008/32;
1233
1234 if (is_ocb)
1235 qparam.aifs = 3;
1236 else
1237 qparam.aifs = 2;
1238 break;
1239 case IEEE80211_AC_VO:
1240 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1241 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1242 if (is_ocb)
1243 qparam.txop = 0;
1244 else if (use_11b)
1245 qparam.txop = 3264/32;
1246 else
1247 qparam.txop = 1504/32;
1248 qparam.aifs = 2;
1249 break;
1250 }
1251 }
1252 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1253
1254 qparam.uapsd = false;
1255
1256 sdata->tx_conf[ac] = qparam;
1257 drv_conf_tx(local, sdata, ac, &qparam);
1258 }
1259
1260 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1261 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1262 sdata->vif.type != NL80211_IFTYPE_NAN) {
1263 sdata->vif.bss_conf.qos = enable_qos;
1264 if (bss_notify)
1265 ieee80211_bss_info_change_notify(sdata,
1266 BSS_CHANGED_QOS);
1267 }
1268}
1269
1270void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1271 u16 transaction, u16 auth_alg, u16 status,
1272 const u8 *extra, size_t extra_len, const u8 *da,
1273 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1274 u32 tx_flags)
1275{
1276 struct ieee80211_local *local = sdata->local;
1277 struct sk_buff *skb;
1278 struct ieee80211_mgmt *mgmt;
1279 int err;
1280
1281
1282 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1283 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1284 if (!skb)
1285 return;
1286
1287 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1288
1289 mgmt = skb_put_zero(skb, 24 + 6);
1290 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1291 IEEE80211_STYPE_AUTH);
1292 memcpy(mgmt->da, da, ETH_ALEN);
1293 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1294 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1295 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1296 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1297 mgmt->u.auth.status_code = cpu_to_le16(status);
1298 if (extra)
1299 skb_put_data(skb, extra, extra_len);
1300
1301 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1302 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1303 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1304 WARN_ON(err);
1305 }
1306
1307 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1308 tx_flags;
1309 ieee80211_tx_skb(sdata, skb);
1310}
1311
1312void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1313 const u8 *bssid, u16 stype, u16 reason,
1314 bool send_frame, u8 *frame_buf)
1315{
1316 struct ieee80211_local *local = sdata->local;
1317 struct sk_buff *skb;
1318 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1319
1320
1321 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1322 mgmt->duration = 0;
1323 mgmt->seq_ctrl = 0;
1324 memcpy(mgmt->da, bssid, ETH_ALEN);
1325 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1326 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1327
1328 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1329
1330 if (send_frame) {
1331 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1332 IEEE80211_DEAUTH_FRAME_LEN);
1333 if (!skb)
1334 return;
1335
1336 skb_reserve(skb, local->hw.extra_tx_headroom);
1337
1338
1339 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1340
1341 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1342 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1343 IEEE80211_SKB_CB(skb)->flags |=
1344 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1345
1346 ieee80211_tx_skb(sdata, skb);
1347 }
1348}
1349
1350static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1351 u8 *buffer, size_t buffer_len,
1352 const u8 *ie, size_t ie_len,
1353 enum nl80211_band band,
1354 u32 rate_mask,
1355 struct cfg80211_chan_def *chandef,
1356 size_t *offset)
1357{
1358 struct ieee80211_supported_band *sband;
1359 u8 *pos = buffer, *end = buffer + buffer_len;
1360 size_t noffset;
1361 int supp_rates_len, i;
1362 u8 rates[32];
1363 int num_rates;
1364 int ext_rates_len;
1365 int shift;
1366 u32 rate_flags;
1367 bool have_80mhz = false;
1368
1369 *offset = 0;
1370
1371 sband = local->hw.wiphy->bands[band];
1372 if (WARN_ON_ONCE(!sband))
1373 return 0;
1374
1375 rate_flags = ieee80211_chandef_rate_flags(chandef);
1376 shift = ieee80211_chandef_get_shift(chandef);
1377
1378 num_rates = 0;
1379 for (i = 0; i < sband->n_bitrates; i++) {
1380 if ((BIT(i) & rate_mask) == 0)
1381 continue;
1382 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1383 continue;
1384
1385 rates[num_rates++] =
1386 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1387 (1 << shift) * 5);
1388 }
1389
1390 supp_rates_len = min_t(int, num_rates, 8);
1391
1392 if (end - pos < 2 + supp_rates_len)
1393 goto out_err;
1394 *pos++ = WLAN_EID_SUPP_RATES;
1395 *pos++ = supp_rates_len;
1396 memcpy(pos, rates, supp_rates_len);
1397 pos += supp_rates_len;
1398
1399
1400 if (ie && ie_len) {
1401 static const u8 before_extrates[] = {
1402 WLAN_EID_SSID,
1403 WLAN_EID_SUPP_RATES,
1404 WLAN_EID_REQUEST,
1405 };
1406 noffset = ieee80211_ie_split(ie, ie_len,
1407 before_extrates,
1408 ARRAY_SIZE(before_extrates),
1409 *offset);
1410 if (end - pos < noffset - *offset)
1411 goto out_err;
1412 memcpy(pos, ie + *offset, noffset - *offset);
1413 pos += noffset - *offset;
1414 *offset = noffset;
1415 }
1416
1417 ext_rates_len = num_rates - supp_rates_len;
1418 if (ext_rates_len > 0) {
1419 if (end - pos < 2 + ext_rates_len)
1420 goto out_err;
1421 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1422 *pos++ = ext_rates_len;
1423 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1424 pos += ext_rates_len;
1425 }
1426
1427 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1428 if (end - pos < 3)
1429 goto out_err;
1430 *pos++ = WLAN_EID_DS_PARAMS;
1431 *pos++ = 1;
1432 *pos++ = ieee80211_frequency_to_channel(
1433 chandef->chan->center_freq);
1434 }
1435
1436
1437 if (ie && ie_len) {
1438 static const u8 before_ht[] = {
1439
1440
1441
1442
1443 WLAN_EID_DS_PARAMS,
1444 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1445 };
1446 noffset = ieee80211_ie_split(ie, ie_len,
1447 before_ht, ARRAY_SIZE(before_ht),
1448 *offset);
1449 if (end - pos < noffset - *offset)
1450 goto out_err;
1451 memcpy(pos, ie + *offset, noffset - *offset);
1452 pos += noffset - *offset;
1453 *offset = noffset;
1454 }
1455
1456 if (sband->ht_cap.ht_supported) {
1457 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1458 goto out_err;
1459 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1460 sband->ht_cap.cap);
1461 }
1462
1463
1464
1465
1466
1467
1468
1469 if (ie && ie_len) {
1470 static const u8 before_vht[] = {
1471
1472
1473
1474
1475 WLAN_EID_BSS_COEX_2040,
1476 WLAN_EID_EXT_CAPABILITY,
1477 WLAN_EID_SSID_LIST,
1478 WLAN_EID_CHANNEL_USAGE,
1479 WLAN_EID_INTERWORKING,
1480 WLAN_EID_MESH_ID,
1481
1482 };
1483 noffset = ieee80211_ie_split(ie, ie_len,
1484 before_vht, ARRAY_SIZE(before_vht),
1485 *offset);
1486 if (end - pos < noffset - *offset)
1487 goto out_err;
1488 memcpy(pos, ie + *offset, noffset - *offset);
1489 pos += noffset - *offset;
1490 *offset = noffset;
1491 }
1492
1493
1494 for (i = 0; i < sband->n_channels; i++) {
1495 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1496 IEEE80211_CHAN_NO_80MHZ))
1497 continue;
1498
1499 have_80mhz = true;
1500 break;
1501 }
1502
1503 if (sband->vht_cap.vht_supported && have_80mhz) {
1504 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1505 goto out_err;
1506 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1507 sband->vht_cap.cap);
1508 }
1509
1510 return pos - buffer;
1511 out_err:
1512 WARN_ONCE(1, "not enough space for preq IEs\n");
1513 return pos - buffer;
1514}
1515
1516int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1517 size_t buffer_len,
1518 struct ieee80211_scan_ies *ie_desc,
1519 const u8 *ie, size_t ie_len,
1520 u8 bands_used, u32 *rate_masks,
1521 struct cfg80211_chan_def *chandef)
1522{
1523 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1524 int i;
1525
1526 memset(ie_desc, 0, sizeof(*ie_desc));
1527
1528 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1529 if (bands_used & BIT(i)) {
1530 pos += ieee80211_build_preq_ies_band(local,
1531 buffer + pos,
1532 buffer_len - pos,
1533 ie, ie_len, i,
1534 rate_masks[i],
1535 chandef,
1536 &custom_ie_offset);
1537 ie_desc->ies[i] = buffer + old_pos;
1538 ie_desc->len[i] = pos - old_pos;
1539 old_pos = pos;
1540 }
1541 }
1542
1543
1544 if (ie && ie_len) {
1545 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1546 "not enough space for preq custom IEs\n"))
1547 return pos;
1548 memcpy(buffer + pos, ie + custom_ie_offset,
1549 ie_len - custom_ie_offset);
1550 ie_desc->common_ies = buffer + pos;
1551 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1552 pos += ie_len - custom_ie_offset;
1553 }
1554
1555 return pos;
1556};
1557
1558struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1559 const u8 *src, const u8 *dst,
1560 u32 ratemask,
1561 struct ieee80211_channel *chan,
1562 const u8 *ssid, size_t ssid_len,
1563 const u8 *ie, size_t ie_len,
1564 bool directed)
1565{
1566 struct ieee80211_local *local = sdata->local;
1567 struct cfg80211_chan_def chandef;
1568 struct sk_buff *skb;
1569 struct ieee80211_mgmt *mgmt;
1570 int ies_len;
1571 u32 rate_masks[NUM_NL80211_BANDS] = {};
1572 struct ieee80211_scan_ies dummy_ie_desc;
1573
1574
1575
1576
1577
1578
1579 chandef.width = sdata->vif.bss_conf.chandef.width;
1580 if (directed)
1581 chandef.chan = NULL;
1582 else
1583 chandef.chan = chan;
1584
1585 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1586 100 + ie_len);
1587 if (!skb)
1588 return NULL;
1589
1590 rate_masks[chan->band] = ratemask;
1591 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1592 skb_tailroom(skb), &dummy_ie_desc,
1593 ie, ie_len, BIT(chan->band),
1594 rate_masks, &chandef);
1595 skb_put(skb, ies_len);
1596
1597 if (dst) {
1598 mgmt = (struct ieee80211_mgmt *) skb->data;
1599 memcpy(mgmt->da, dst, ETH_ALEN);
1600 memcpy(mgmt->bssid, dst, ETH_ALEN);
1601 }
1602
1603 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1604
1605 return skb;
1606}
1607
1608void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1609 const u8 *src, const u8 *dst,
1610 const u8 *ssid, size_t ssid_len,
1611 const u8 *ie, size_t ie_len,
1612 u32 ratemask, bool directed, u32 tx_flags,
1613 struct ieee80211_channel *channel, bool scan)
1614{
1615 struct sk_buff *skb;
1616
1617 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1618 ssid, ssid_len,
1619 ie, ie_len, directed);
1620 if (skb) {
1621 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1622 if (scan)
1623 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1624 else
1625 ieee80211_tx_skb(sdata, skb);
1626 }
1627}
1628
1629u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1630 struct ieee802_11_elems *elems,
1631 enum nl80211_band band, u32 *basic_rates)
1632{
1633 struct ieee80211_supported_band *sband;
1634 size_t num_rates;
1635 u32 supp_rates, rate_flags;
1636 int i, j, shift;
1637
1638 sband = sdata->local->hw.wiphy->bands[band];
1639 if (WARN_ON(!sband))
1640 return 1;
1641
1642 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1643 shift = ieee80211_vif_get_shift(&sdata->vif);
1644
1645 num_rates = sband->n_bitrates;
1646 supp_rates = 0;
1647 for (i = 0; i < elems->supp_rates_len +
1648 elems->ext_supp_rates_len; i++) {
1649 u8 rate = 0;
1650 int own_rate;
1651 bool is_basic;
1652 if (i < elems->supp_rates_len)
1653 rate = elems->supp_rates[i];
1654 else if (elems->ext_supp_rates)
1655 rate = elems->ext_supp_rates
1656 [i - elems->supp_rates_len];
1657 own_rate = 5 * (rate & 0x7f);
1658 is_basic = !!(rate & 0x80);
1659
1660 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1661 continue;
1662
1663 for (j = 0; j < num_rates; j++) {
1664 int brate;
1665 if ((rate_flags & sband->bitrates[j].flags)
1666 != rate_flags)
1667 continue;
1668
1669 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1670 1 << shift);
1671
1672 if (brate == own_rate) {
1673 supp_rates |= BIT(j);
1674 if (basic_rates && is_basic)
1675 *basic_rates |= BIT(j);
1676 }
1677 }
1678 }
1679 return supp_rates;
1680}
1681
1682void ieee80211_stop_device(struct ieee80211_local *local)
1683{
1684 ieee80211_led_radio(local, false);
1685 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1686
1687 cancel_work_sync(&local->reconfig_filter);
1688
1689 flush_workqueue(local->workqueue);
1690 drv_stop(local);
1691}
1692
1693static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1694 bool aborted)
1695{
1696
1697
1698
1699
1700
1701
1702
1703 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1704
1705
1706
1707
1708
1709 if (aborted)
1710 set_bit(SCAN_ABORTED, &local->scanning);
1711 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1712 flush_delayed_work(&local->scan_work);
1713 }
1714}
1715
1716static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1717{
1718 struct ieee80211_sub_if_data *sdata;
1719 struct ieee80211_chanctx *ctx;
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731 local->resuming = false;
1732 local->suspended = false;
1733 local->in_reconfig = false;
1734
1735 ieee80211_flush_completed_scan(local, true);
1736
1737
1738
1739
1740 ieee80211_sched_scan_end(local);
1741
1742 list_for_each_entry(sdata, &local->interfaces, list)
1743 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1744
1745
1746
1747
1748 mutex_lock(&local->chanctx_mtx);
1749 list_for_each_entry(ctx, &local->chanctx_list, list)
1750 ctx->driver_present = false;
1751 mutex_unlock(&local->chanctx_mtx);
1752
1753 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1754}
1755
1756static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1757 struct ieee80211_sub_if_data *sdata)
1758{
1759 struct ieee80211_chanctx_conf *conf;
1760 struct ieee80211_chanctx *ctx;
1761
1762 if (!local->use_chanctx)
1763 return;
1764
1765 mutex_lock(&local->chanctx_mtx);
1766 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1767 lockdep_is_held(&local->chanctx_mtx));
1768 if (conf) {
1769 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1770 drv_assign_vif_chanctx(local, sdata, ctx);
1771 }
1772 mutex_unlock(&local->chanctx_mtx);
1773}
1774
1775static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1776{
1777 struct ieee80211_local *local = sdata->local;
1778 struct sta_info *sta;
1779
1780
1781 mutex_lock(&local->sta_mtx);
1782 list_for_each_entry(sta, &local->sta_list, list) {
1783 enum ieee80211_sta_state state;
1784
1785 if (!sta->uploaded || sta->sdata != sdata)
1786 continue;
1787
1788 for (state = IEEE80211_STA_NOTEXIST;
1789 state < sta->sta_state; state++)
1790 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1791 state + 1));
1792 }
1793 mutex_unlock(&local->sta_mtx);
1794}
1795
1796static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1797{
1798 struct cfg80211_nan_func *func, **funcs;
1799 int res, id, i = 0;
1800
1801 res = drv_start_nan(sdata->local, sdata,
1802 &sdata->u.nan.conf);
1803 if (WARN_ON(res))
1804 return res;
1805
1806 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1807 sizeof(*funcs), GFP_KERNEL);
1808 if (!funcs)
1809 return -ENOMEM;
1810
1811
1812
1813
1814
1815 spin_lock_bh(&sdata->u.nan.func_lock);
1816
1817 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1818 funcs[i++] = func;
1819
1820 spin_unlock_bh(&sdata->u.nan.func_lock);
1821
1822 for (i = 0; funcs[i]; i++) {
1823 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1824 if (WARN_ON(res))
1825 ieee80211_nan_func_terminated(&sdata->vif,
1826 funcs[i]->instance_id,
1827 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1828 GFP_KERNEL);
1829 }
1830
1831 kfree(funcs);
1832
1833 return 0;
1834}
1835
1836int ieee80211_reconfig(struct ieee80211_local *local)
1837{
1838 struct ieee80211_hw *hw = &local->hw;
1839 struct ieee80211_sub_if_data *sdata;
1840 struct ieee80211_chanctx *ctx;
1841 struct sta_info *sta;
1842 int res, i;
1843 bool reconfig_due_to_wowlan = false;
1844 struct ieee80211_sub_if_data *sched_scan_sdata;
1845 struct cfg80211_sched_scan_request *sched_scan_req;
1846 bool sched_scan_stopped = false;
1847 bool suspended = local->suspended;
1848
1849
1850 if (!local->open_count)
1851 goto wake_up;
1852
1853#ifdef CONFIG_PM
1854 if (suspended)
1855 local->resuming = true;
1856
1857 if (local->wowlan) {
1858
1859
1860
1861
1862
1863
1864 local->suspended = false;
1865 res = drv_resume(local);
1866 local->wowlan = false;
1867 if (res < 0) {
1868 local->resuming = false;
1869 return res;
1870 }
1871 if (res == 0)
1872 goto wake_up;
1873 WARN_ON(res > 1);
1874
1875
1876
1877
1878
1879 reconfig_due_to_wowlan = true;
1880 local->suspended = true;
1881 }
1882#endif
1883
1884
1885
1886
1887
1888
1889
1890
1891 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1892 cancel_work_sync(&local->restart_work);
1893
1894 local->started = false;
1895
1896
1897
1898
1899
1900
1901
1902 res = drv_start(local);
1903 if (res) {
1904 if (suspended)
1905 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1906 else
1907 WARN(1, "Hardware became unavailable during restart.\n");
1908 ieee80211_handle_reconfig_failure(local);
1909 return res;
1910 }
1911
1912
1913 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1914
1915
1916 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1917
1918
1919 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1920
1921 ieee80211_led_radio(local, true);
1922 ieee80211_mod_tpt_led_trig(local,
1923 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1924
1925
1926 sdata = rtnl_dereference(local->monitor_sdata);
1927 if (sdata) {
1928
1929 WARN_ON(local->resuming);
1930 res = drv_add_interface(local, sdata);
1931 if (WARN_ON(res)) {
1932 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1933 synchronize_net();
1934 kfree(sdata);
1935 }
1936 }
1937
1938 list_for_each_entry(sdata, &local->interfaces, list) {
1939 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1940 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1941 ieee80211_sdata_running(sdata)) {
1942 res = drv_add_interface(local, sdata);
1943 if (WARN_ON(res))
1944 break;
1945 }
1946 }
1947
1948
1949
1950
1951 if (res) {
1952 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1953 list)
1954 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1955 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1956 ieee80211_sdata_running(sdata))
1957 drv_remove_interface(local, sdata);
1958 ieee80211_handle_reconfig_failure(local);
1959 return res;
1960 }
1961
1962
1963 if (local->use_chanctx) {
1964 mutex_lock(&local->chanctx_mtx);
1965 list_for_each_entry(ctx, &local->chanctx_list, list)
1966 if (ctx->replace_state !=
1967 IEEE80211_CHANCTX_REPLACES_OTHER)
1968 WARN_ON(drv_add_chanctx(local, ctx));
1969 mutex_unlock(&local->chanctx_mtx);
1970
1971 sdata = rtnl_dereference(local->monitor_sdata);
1972 if (sdata && ieee80211_sdata_running(sdata))
1973 ieee80211_assign_chanctx(local, sdata);
1974 }
1975
1976
1977 ieee80211_hw_config(local, ~0);
1978
1979 ieee80211_configure_filter(local);
1980
1981
1982 list_for_each_entry(sdata, &local->interfaces, list) {
1983 u32 changed;
1984
1985 if (!ieee80211_sdata_running(sdata))
1986 continue;
1987
1988 ieee80211_assign_chanctx(local, sdata);
1989
1990 switch (sdata->vif.type) {
1991 case NL80211_IFTYPE_AP_VLAN:
1992 case NL80211_IFTYPE_MONITOR:
1993 break;
1994 default:
1995 ieee80211_reconfig_stations(sdata);
1996
1997 case NL80211_IFTYPE_AP:
1998 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1999 drv_conf_tx(local, sdata, i,
2000 &sdata->tx_conf[i]);
2001 break;
2002 }
2003
2004
2005 changed = BSS_CHANGED_ERP_CTS_PROT |
2006 BSS_CHANGED_ERP_PREAMBLE |
2007 BSS_CHANGED_ERP_SLOT |
2008 BSS_CHANGED_HT |
2009 BSS_CHANGED_BASIC_RATES |
2010 BSS_CHANGED_BEACON_INT |
2011 BSS_CHANGED_BSSID |
2012 BSS_CHANGED_CQM |
2013 BSS_CHANGED_QOS |
2014 BSS_CHANGED_IDLE |
2015 BSS_CHANGED_TXPOWER |
2016 BSS_CHANGED_MCAST_RATE;
2017
2018 if (sdata->vif.mu_mimo_owner)
2019 changed |= BSS_CHANGED_MU_GROUPS;
2020
2021 switch (sdata->vif.type) {
2022 case NL80211_IFTYPE_STATION:
2023 changed |= BSS_CHANGED_ASSOC |
2024 BSS_CHANGED_ARP_FILTER |
2025 BSS_CHANGED_PS;
2026
2027
2028 if (sdata->u.mgd.have_beacon)
2029 changed |= BSS_CHANGED_BEACON_INFO;
2030
2031 if (sdata->vif.bss_conf.max_idle_period ||
2032 sdata->vif.bss_conf.protected_keep_alive)
2033 changed |= BSS_CHANGED_KEEP_ALIVE;
2034
2035 sdata_lock(sdata);
2036 ieee80211_bss_info_change_notify(sdata, changed);
2037 sdata_unlock(sdata);
2038 break;
2039 case NL80211_IFTYPE_OCB:
2040 changed |= BSS_CHANGED_OCB;
2041 ieee80211_bss_info_change_notify(sdata, changed);
2042 break;
2043 case NL80211_IFTYPE_ADHOC:
2044 changed |= BSS_CHANGED_IBSS;
2045
2046 case NL80211_IFTYPE_AP:
2047 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2048
2049 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2050 changed |= BSS_CHANGED_AP_PROBE_RESP;
2051
2052 if (rcu_access_pointer(sdata->u.ap.beacon))
2053 drv_start_ap(local, sdata);
2054 }
2055
2056
2057 case NL80211_IFTYPE_MESH_POINT:
2058 if (sdata->vif.bss_conf.enable_beacon) {
2059 changed |= BSS_CHANGED_BEACON |
2060 BSS_CHANGED_BEACON_ENABLED;
2061 ieee80211_bss_info_change_notify(sdata, changed);
2062 }
2063 break;
2064 case NL80211_IFTYPE_NAN:
2065 res = ieee80211_reconfig_nan(sdata);
2066 if (res < 0) {
2067 ieee80211_handle_reconfig_failure(local);
2068 return res;
2069 }
2070 break;
2071 case NL80211_IFTYPE_WDS:
2072 case NL80211_IFTYPE_AP_VLAN:
2073 case NL80211_IFTYPE_MONITOR:
2074 case NL80211_IFTYPE_P2P_DEVICE:
2075
2076 break;
2077 case NL80211_IFTYPE_UNSPECIFIED:
2078 case NUM_NL80211_IFTYPES:
2079 case NL80211_IFTYPE_P2P_CLIENT:
2080 case NL80211_IFTYPE_P2P_GO:
2081 WARN_ON(1);
2082 break;
2083 }
2084 }
2085
2086 ieee80211_recalc_ps(local);
2087
2088
2089
2090
2091
2092
2093
2094 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2095 list_for_each_entry(sdata, &local->interfaces, list) {
2096 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2097 continue;
2098 if (!sdata->u.mgd.associated)
2099 continue;
2100
2101 ieee80211_send_nullfunc(local, sdata, false);
2102 }
2103 }
2104
2105
2106 mutex_lock(&local->sta_mtx);
2107 list_for_each_entry(sta, &local->sta_list, list) {
2108 enum ieee80211_sta_state state;
2109
2110 if (!sta->uploaded)
2111 continue;
2112
2113 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2114 continue;
2115
2116 for (state = IEEE80211_STA_NOTEXIST;
2117 state < sta->sta_state; state++)
2118 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2119 state + 1));
2120 }
2121 mutex_unlock(&local->sta_mtx);
2122
2123
2124 list_for_each_entry(sdata, &local->interfaces, list)
2125 ieee80211_reset_crypto_tx_tailroom(sdata);
2126
2127 list_for_each_entry(sdata, &local->interfaces, list)
2128 if (ieee80211_sdata_running(sdata))
2129 ieee80211_enable_keys(sdata);
2130
2131
2132 mutex_lock(&local->mtx);
2133 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2134 lockdep_is_held(&local->mtx));
2135 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2136 lockdep_is_held(&local->mtx));
2137 if (sched_scan_sdata && sched_scan_req)
2138
2139
2140
2141
2142
2143
2144
2145 if (sched_scan_req->n_scan_plans > 1 ||
2146 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2147 sched_scan_req)) {
2148 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2149 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2150 sched_scan_stopped = true;
2151 }
2152 mutex_unlock(&local->mtx);
2153
2154 if (sched_scan_stopped)
2155 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2156
2157 wake_up:
2158
2159 if (local->monitors == local->open_count && local->monitors > 0)
2160 ieee80211_add_virtual_monitor(local);
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2173 mutex_lock(&local->sta_mtx);
2174
2175 list_for_each_entry(sta, &local->sta_list, list) {
2176 if (!local->resuming)
2177 ieee80211_sta_tear_down_BA_sessions(
2178 sta, AGG_STOP_LOCAL_REQUEST);
2179 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2180 }
2181
2182 mutex_unlock(&local->sta_mtx);
2183 }
2184
2185 if (local->in_reconfig) {
2186 local->in_reconfig = false;
2187 barrier();
2188
2189
2190 mutex_lock(&local->mtx);
2191 ieee80211_start_next_roc(local);
2192 mutex_unlock(&local->mtx);
2193 }
2194
2195 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2196 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2197 false);
2198
2199
2200
2201
2202
2203 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2204 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2205
2206 if (!suspended)
2207 return 0;
2208
2209#ifdef CONFIG_PM
2210
2211 local->suspended = false;
2212 mb();
2213 local->resuming = false;
2214
2215 ieee80211_flush_completed_scan(local, false);
2216
2217 if (local->open_count && !reconfig_due_to_wowlan)
2218 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2219
2220 list_for_each_entry(sdata, &local->interfaces, list) {
2221 if (!ieee80211_sdata_running(sdata))
2222 continue;
2223 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2224 ieee80211_sta_restart(sdata);
2225 }
2226
2227 mod_timer(&local->sta_cleanup, jiffies + 1);
2228#else
2229 WARN_ON(1);
2230#endif
2231
2232 return 0;
2233}
2234
2235void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2236{
2237 struct ieee80211_sub_if_data *sdata;
2238 struct ieee80211_local *local;
2239 struct ieee80211_key *key;
2240
2241 if (WARN_ON(!vif))
2242 return;
2243
2244 sdata = vif_to_sdata(vif);
2245 local = sdata->local;
2246
2247 if (WARN_ON(!local->resuming))
2248 return;
2249
2250 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2251 return;
2252
2253 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2254
2255 mutex_lock(&local->key_mtx);
2256 list_for_each_entry(key, &sdata->key_list, list)
2257 key->flags |= KEY_FLAG_TAINTED;
2258 mutex_unlock(&local->key_mtx);
2259}
2260EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2261
2262void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2263{
2264 struct ieee80211_local *local = sdata->local;
2265 struct ieee80211_chanctx_conf *chanctx_conf;
2266 struct ieee80211_chanctx *chanctx;
2267
2268 mutex_lock(&local->chanctx_mtx);
2269
2270 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2271 lockdep_is_held(&local->chanctx_mtx));
2272
2273
2274
2275
2276
2277
2278
2279 if (!chanctx_conf)
2280 goto unlock;
2281
2282 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2283 ieee80211_recalc_smps_chanctx(local, chanctx);
2284 unlock:
2285 mutex_unlock(&local->chanctx_mtx);
2286}
2287
2288void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2289{
2290 struct ieee80211_local *local = sdata->local;
2291 struct ieee80211_chanctx_conf *chanctx_conf;
2292 struct ieee80211_chanctx *chanctx;
2293
2294 mutex_lock(&local->chanctx_mtx);
2295
2296 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2297 lockdep_is_held(&local->chanctx_mtx));
2298
2299 if (WARN_ON_ONCE(!chanctx_conf))
2300 goto unlock;
2301
2302 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2303 ieee80211_recalc_chanctx_min_def(local, chanctx);
2304 unlock:
2305 mutex_unlock(&local->chanctx_mtx);
2306}
2307
2308size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2309{
2310 size_t pos = offset;
2311
2312 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2313 pos += 2 + ies[pos + 1];
2314
2315 return pos;
2316}
2317
2318static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2319 int rssi_min_thold,
2320 int rssi_max_thold)
2321{
2322 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2323
2324 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2325 return;
2326
2327
2328
2329
2330
2331
2332 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2333 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2334}
2335
2336void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2337 int rssi_min_thold,
2338 int rssi_max_thold)
2339{
2340 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2341
2342 WARN_ON(rssi_min_thold == rssi_max_thold ||
2343 rssi_min_thold > rssi_max_thold);
2344
2345 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2346 rssi_max_thold);
2347}
2348EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2349
2350void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2351{
2352 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2353
2354 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2355}
2356EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2357
2358u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2359 u16 cap)
2360{
2361 __le16 tmp;
2362
2363 *pos++ = WLAN_EID_HT_CAPABILITY;
2364 *pos++ = sizeof(struct ieee80211_ht_cap);
2365 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2366
2367
2368 tmp = cpu_to_le16(cap);
2369 memcpy(pos, &tmp, sizeof(u16));
2370 pos += sizeof(u16);
2371
2372
2373 *pos++ = ht_cap->ampdu_factor |
2374 (ht_cap->ampdu_density <<
2375 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2376
2377
2378 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2379 pos += sizeof(ht_cap->mcs);
2380
2381
2382 pos += sizeof(__le16);
2383
2384
2385 pos += sizeof(__le32);
2386
2387
2388 pos += sizeof(u8);
2389
2390 return pos;
2391}
2392
2393u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2394 u32 cap)
2395{
2396 __le32 tmp;
2397
2398 *pos++ = WLAN_EID_VHT_CAPABILITY;
2399 *pos++ = sizeof(struct ieee80211_vht_cap);
2400 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2401
2402
2403 tmp = cpu_to_le32(cap);
2404 memcpy(pos, &tmp, sizeof(u32));
2405 pos += sizeof(u32);
2406
2407
2408 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2409 pos += sizeof(vht_cap->vht_mcs);
2410
2411 return pos;
2412}
2413
2414u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2415 const struct cfg80211_chan_def *chandef,
2416 u16 prot_mode, bool rifs_mode)
2417{
2418 struct ieee80211_ht_operation *ht_oper;
2419
2420 *pos++ = WLAN_EID_HT_OPERATION;
2421 *pos++ = sizeof(struct ieee80211_ht_operation);
2422 ht_oper = (struct ieee80211_ht_operation *)pos;
2423 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2424 chandef->chan->center_freq);
2425 switch (chandef->width) {
2426 case NL80211_CHAN_WIDTH_160:
2427 case NL80211_CHAN_WIDTH_80P80:
2428 case NL80211_CHAN_WIDTH_80:
2429 case NL80211_CHAN_WIDTH_40:
2430 if (chandef->center_freq1 > chandef->chan->center_freq)
2431 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2432 else
2433 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2434 break;
2435 default:
2436 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2437 break;
2438 }
2439 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2440 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2441 chandef->width != NL80211_CHAN_WIDTH_20)
2442 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2443
2444 if (rifs_mode)
2445 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2446
2447 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2448 ht_oper->stbc_param = 0x0000;
2449
2450
2451
2452 memset(&ht_oper->basic_set, 0, 16);
2453 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2454
2455 return pos + sizeof(struct ieee80211_ht_operation);
2456}
2457
2458void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2459 const struct cfg80211_chan_def *chandef)
2460{
2461 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;
2462 *pos++ = 3;
2463
2464 switch (chandef->width) {
2465 case NL80211_CHAN_WIDTH_80:
2466 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2467 break;
2468 case NL80211_CHAN_WIDTH_160:
2469 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2470 break;
2471 case NL80211_CHAN_WIDTH_80P80:
2472 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2473 break;
2474 default:
2475 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2476 }
2477
2478
2479 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2480
2481 if (chandef->center_freq2)
2482 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2483 else
2484 *pos++ = 0;
2485}
2486
2487u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2488 const struct cfg80211_chan_def *chandef)
2489{
2490 struct ieee80211_vht_operation *vht_oper;
2491
2492 *pos++ = WLAN_EID_VHT_OPERATION;
2493 *pos++ = sizeof(struct ieee80211_vht_operation);
2494 vht_oper = (struct ieee80211_vht_operation *)pos;
2495 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2496 chandef->center_freq1);
2497 if (chandef->center_freq2)
2498 vht_oper->center_freq_seg1_idx =
2499 ieee80211_frequency_to_channel(chandef->center_freq2);
2500 else
2501 vht_oper->center_freq_seg1_idx = 0x00;
2502
2503 switch (chandef->width) {
2504 case NL80211_CHAN_WIDTH_160:
2505
2506
2507
2508
2509 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2510 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2511 if (chandef->chan->center_freq < chandef->center_freq1)
2512 vht_oper->center_freq_seg0_idx -= 8;
2513 else
2514 vht_oper->center_freq_seg0_idx += 8;
2515 break;
2516 case NL80211_CHAN_WIDTH_80P80:
2517
2518
2519
2520
2521 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2522 break;
2523 case NL80211_CHAN_WIDTH_80:
2524 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2525 break;
2526 default:
2527 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2528 break;
2529 }
2530
2531
2532 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2533
2534 return pos + sizeof(struct ieee80211_vht_operation);
2535}
2536
2537bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2538 struct cfg80211_chan_def *chandef)
2539{
2540 enum nl80211_channel_type channel_type;
2541
2542 if (!ht_oper)
2543 return false;
2544
2545 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2546 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2547 channel_type = NL80211_CHAN_HT20;
2548 break;
2549 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2550 channel_type = NL80211_CHAN_HT40PLUS;
2551 break;
2552 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2553 channel_type = NL80211_CHAN_HT40MINUS;
2554 break;
2555 default:
2556 channel_type = NL80211_CHAN_NO_HT;
2557 return false;
2558 }
2559
2560 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2561 return true;
2562}
2563
2564bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2565 struct cfg80211_chan_def *chandef)
2566{
2567 struct cfg80211_chan_def new = *chandef;
2568 int cf1, cf2;
2569
2570 if (!oper)
2571 return false;
2572
2573 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2574 chandef->chan->band);
2575 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2576 chandef->chan->band);
2577
2578 switch (oper->chan_width) {
2579 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2580 break;
2581 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2582 new.width = NL80211_CHAN_WIDTH_80;
2583 new.center_freq1 = cf1;
2584
2585 if (oper->center_freq_seg1_idx) {
2586 unsigned int diff;
2587
2588 diff = abs(oper->center_freq_seg1_idx -
2589 oper->center_freq_seg0_idx);
2590 if (diff == 8) {
2591 new.width = NL80211_CHAN_WIDTH_160;
2592 new.center_freq1 = cf2;
2593 } else if (diff > 8) {
2594 new.width = NL80211_CHAN_WIDTH_80P80;
2595 new.center_freq2 = cf2;
2596 }
2597 }
2598 break;
2599 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2600 new.width = NL80211_CHAN_WIDTH_160;
2601 new.center_freq1 = cf1;
2602 break;
2603 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2604 new.width = NL80211_CHAN_WIDTH_80P80;
2605 new.center_freq1 = cf1;
2606 new.center_freq2 = cf2;
2607 break;
2608 default:
2609 return false;
2610 }
2611
2612 if (!cfg80211_chandef_valid(&new))
2613 return false;
2614
2615 *chandef = new;
2616 return true;
2617}
2618
2619int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2620 const struct ieee80211_supported_band *sband,
2621 const u8 *srates, int srates_len, u32 *rates)
2622{
2623 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2624 int shift = ieee80211_chandef_get_shift(chandef);
2625 struct ieee80211_rate *br;
2626 int brate, rate, i, j, count = 0;
2627
2628 *rates = 0;
2629
2630 for (i = 0; i < srates_len; i++) {
2631 rate = srates[i] & 0x7f;
2632
2633 for (j = 0; j < sband->n_bitrates; j++) {
2634 br = &sband->bitrates[j];
2635 if ((rate_flags & br->flags) != rate_flags)
2636 continue;
2637
2638 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2639 if (brate == rate) {
2640 *rates |= BIT(j);
2641 count++;
2642 break;
2643 }
2644 }
2645 }
2646 return count;
2647}
2648
2649int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2650 struct sk_buff *skb, bool need_basic,
2651 enum nl80211_band band)
2652{
2653 struct ieee80211_local *local = sdata->local;
2654 struct ieee80211_supported_band *sband;
2655 int rate, shift;
2656 u8 i, rates, *pos;
2657 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2658 u32 rate_flags;
2659
2660 shift = ieee80211_vif_get_shift(&sdata->vif);
2661 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2662 sband = local->hw.wiphy->bands[band];
2663 rates = 0;
2664 for (i = 0; i < sband->n_bitrates; i++) {
2665 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2666 continue;
2667 rates++;
2668 }
2669 if (rates > 8)
2670 rates = 8;
2671
2672 if (skb_tailroom(skb) < rates + 2)
2673 return -ENOMEM;
2674
2675 pos = skb_put(skb, rates + 2);
2676 *pos++ = WLAN_EID_SUPP_RATES;
2677 *pos++ = rates;
2678 for (i = 0; i < rates; i++) {
2679 u8 basic = 0;
2680 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2681 continue;
2682
2683 if (need_basic && basic_rates & BIT(i))
2684 basic = 0x80;
2685 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2686 5 * (1 << shift));
2687 *pos++ = basic | (u8) rate;
2688 }
2689
2690 return 0;
2691}
2692
2693int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2694 struct sk_buff *skb, bool need_basic,
2695 enum nl80211_band band)
2696{
2697 struct ieee80211_local *local = sdata->local;
2698 struct ieee80211_supported_band *sband;
2699 int rate, shift;
2700 u8 i, exrates, *pos;
2701 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2702 u32 rate_flags;
2703
2704 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2705 shift = ieee80211_vif_get_shift(&sdata->vif);
2706
2707 sband = local->hw.wiphy->bands[band];
2708 exrates = 0;
2709 for (i = 0; i < sband->n_bitrates; i++) {
2710 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2711 continue;
2712 exrates++;
2713 }
2714
2715 if (exrates > 8)
2716 exrates -= 8;
2717 else
2718 exrates = 0;
2719
2720 if (skb_tailroom(skb) < exrates + 2)
2721 return -ENOMEM;
2722
2723 if (exrates) {
2724 pos = skb_put(skb, exrates + 2);
2725 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2726 *pos++ = exrates;
2727 for (i = 8; i < sband->n_bitrates; i++) {
2728 u8 basic = 0;
2729 if ((rate_flags & sband->bitrates[i].flags)
2730 != rate_flags)
2731 continue;
2732 if (need_basic && basic_rates & BIT(i))
2733 basic = 0x80;
2734 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2735 5 * (1 << shift));
2736 *pos++ = basic | (u8) rate;
2737 }
2738 }
2739 return 0;
2740}
2741
2742int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2743{
2744 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2745 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2746
2747 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2748
2749 return 0;
2750 }
2751 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2752}
2753EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2754
2755u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2756{
2757 if (!mcs)
2758 return 1;
2759
2760
2761
2762 if (mcs->rx_mask[3])
2763 return 4;
2764 if (mcs->rx_mask[2])
2765 return 3;
2766 if (mcs->rx_mask[1])
2767 return 2;
2768 return 1;
2769}
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2783 struct ieee80211_rx_status *status,
2784 unsigned int mpdu_len,
2785 unsigned int mpdu_offset)
2786{
2787 u64 ts = status->mactime;
2788 struct rate_info ri;
2789 u16 rate;
2790
2791 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2792 return 0;
2793
2794 memset(&ri, 0, sizeof(ri));
2795
2796
2797 switch (status->encoding) {
2798 case RX_ENC_HT:
2799 ri.mcs = status->rate_idx;
2800 ri.flags |= RATE_INFO_FLAGS_MCS;
2801 ri.bw = status->bw;
2802 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2803 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2804 break;
2805 case RX_ENC_VHT:
2806 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2807 ri.mcs = status->rate_idx;
2808 ri.nss = status->nss;
2809 ri.bw = status->bw;
2810 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2811 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2812 break;
2813 default:
2814 WARN_ON(1);
2815
2816 case RX_ENC_LEGACY: {
2817 struct ieee80211_supported_band *sband;
2818 int shift = 0;
2819 int bitrate;
2820
2821 ri.bw = status->bw;
2822
2823 switch (status->bw) {
2824 case RATE_INFO_BW_10:
2825 shift = 1;
2826 break;
2827 case RATE_INFO_BW_5:
2828 shift = 2;
2829 break;
2830 }
2831
2832 sband = local->hw.wiphy->bands[status->band];
2833 bitrate = sband->bitrates[status->rate_idx].bitrate;
2834 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2835
2836 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2837
2838 if (status->band == NL80211_BAND_5GHZ) {
2839 ts += 20 << shift;
2840 mpdu_offset += 2;
2841 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2842 ts += 96;
2843 } else {
2844 ts += 192;
2845 }
2846 }
2847 break;
2848 }
2849 }
2850
2851 rate = cfg80211_calculate_bitrate(&ri);
2852 if (WARN_ONCE(!rate,
2853 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2854 (unsigned long long)status->flag, status->rate_idx,
2855 status->nss))
2856 return 0;
2857
2858
2859 if (status->flag & RX_FLAG_MACTIME_END)
2860 ts -= mpdu_len * 8 * 10 / rate;
2861
2862 ts += mpdu_offset * 8 * 10 / rate;
2863
2864 return ts;
2865}
2866
2867void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2868{
2869 struct ieee80211_sub_if_data *sdata;
2870 struct cfg80211_chan_def chandef;
2871
2872
2873 ASSERT_RTNL();
2874
2875 mutex_lock(&local->mtx);
2876 list_for_each_entry(sdata, &local->interfaces, list) {
2877
2878
2879
2880
2881 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2882
2883 if (sdata->wdev.cac_started) {
2884 chandef = sdata->vif.bss_conf.chandef;
2885 ieee80211_vif_release_channel(sdata);
2886 cfg80211_cac_event(sdata->dev,
2887 &chandef,
2888 NL80211_RADAR_CAC_ABORTED,
2889 GFP_KERNEL);
2890 }
2891 }
2892 mutex_unlock(&local->mtx);
2893}
2894
2895void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2896{
2897 struct ieee80211_local *local =
2898 container_of(work, struct ieee80211_local, radar_detected_work);
2899 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2900 struct ieee80211_chanctx *ctx;
2901 int num_chanctx = 0;
2902
2903 mutex_lock(&local->chanctx_mtx);
2904 list_for_each_entry(ctx, &local->chanctx_list, list) {
2905 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2906 continue;
2907
2908 num_chanctx++;
2909 chandef = ctx->conf.def;
2910 }
2911 mutex_unlock(&local->chanctx_mtx);
2912
2913 rtnl_lock();
2914 ieee80211_dfs_cac_cancel(local);
2915 rtnl_unlock();
2916
2917 if (num_chanctx > 1)
2918
2919 WARN_ON(1);
2920 else
2921 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2922}
2923
2924void ieee80211_radar_detected(struct ieee80211_hw *hw)
2925{
2926 struct ieee80211_local *local = hw_to_local(hw);
2927
2928 trace_api_radar_detected(local);
2929
2930 schedule_work(&local->radar_detected_work);
2931}
2932EXPORT_SYMBOL(ieee80211_radar_detected);
2933
2934u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2935{
2936 u32 ret;
2937 int tmp;
2938
2939 switch (c->width) {
2940 case NL80211_CHAN_WIDTH_20:
2941 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2942 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2943 break;
2944 case NL80211_CHAN_WIDTH_40:
2945 c->width = NL80211_CHAN_WIDTH_20;
2946 c->center_freq1 = c->chan->center_freq;
2947 ret = IEEE80211_STA_DISABLE_40MHZ |
2948 IEEE80211_STA_DISABLE_VHT;
2949 break;
2950 case NL80211_CHAN_WIDTH_80:
2951 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2952
2953 tmp /= 2;
2954
2955 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2956 c->width = NL80211_CHAN_WIDTH_40;
2957 ret = IEEE80211_STA_DISABLE_VHT;
2958 break;
2959 case NL80211_CHAN_WIDTH_80P80:
2960 c->center_freq2 = 0;
2961 c->width = NL80211_CHAN_WIDTH_80;
2962 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2963 IEEE80211_STA_DISABLE_160MHZ;
2964 break;
2965 case NL80211_CHAN_WIDTH_160:
2966
2967 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2968
2969 tmp /= 4;
2970 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2971 c->width = NL80211_CHAN_WIDTH_80;
2972 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2973 IEEE80211_STA_DISABLE_160MHZ;
2974 break;
2975 default:
2976 case NL80211_CHAN_WIDTH_20_NOHT:
2977 WARN_ON_ONCE(1);
2978 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2979 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2980 break;
2981 case NL80211_CHAN_WIDTH_5:
2982 case NL80211_CHAN_WIDTH_10:
2983 WARN_ON_ONCE(1);
2984
2985 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2986 break;
2987 }
2988
2989 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2990
2991 return ret;
2992}
2993
2994
2995
2996
2997
2998bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2999 enum ieee80211_smps_mode smps_mode_new)
3000{
3001 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3002 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3003 return false;
3004
3005 switch (smps_mode_old) {
3006 case IEEE80211_SMPS_STATIC:
3007 return false;
3008 case IEEE80211_SMPS_DYNAMIC:
3009 return smps_mode_new == IEEE80211_SMPS_STATIC;
3010 case IEEE80211_SMPS_OFF:
3011 return smps_mode_new != IEEE80211_SMPS_OFF;
3012 default:
3013 WARN_ON(1);
3014 }
3015
3016 return false;
3017}
3018
3019int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3020 struct cfg80211_csa_settings *csa_settings)
3021{
3022 struct sk_buff *skb;
3023 struct ieee80211_mgmt *mgmt;
3024 struct ieee80211_local *local = sdata->local;
3025 int freq;
3026 int hdr_len = offsetofend(struct ieee80211_mgmt,
3027 u.action.u.chan_switch);
3028 u8 *pos;
3029
3030 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3031 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3032 return -EOPNOTSUPP;
3033
3034 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3035 5 +
3036 3 +
3037 5 +
3038 8);
3039 if (!skb)
3040 return -ENOMEM;
3041
3042 skb_reserve(skb, local->tx_headroom);
3043 mgmt = skb_put_zero(skb, hdr_len);
3044 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3045 IEEE80211_STYPE_ACTION);
3046
3047 eth_broadcast_addr(mgmt->da);
3048 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3049 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3050 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3051 } else {
3052 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3053 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3054 }
3055 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3056 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3057 pos = skb_put(skb, 5);
3058 *pos++ = WLAN_EID_CHANNEL_SWITCH;
3059 *pos++ = 3;
3060 *pos++ = csa_settings->block_tx ? 1 : 0;
3061 freq = csa_settings->chandef.chan->center_freq;
3062 *pos++ = ieee80211_frequency_to_channel(freq);
3063 *pos++ = csa_settings->count;
3064
3065 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3066 enum nl80211_channel_type ch_type;
3067
3068 skb_put(skb, 3);
3069 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
3070 *pos++ = 1;
3071 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3072 if (ch_type == NL80211_CHAN_HT40PLUS)
3073 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3074 else
3075 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3076 }
3077
3078 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3079 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3080
3081 skb_put(skb, 8);
3082 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
3083 *pos++ = 6;
3084 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;
3085 *pos = 0x00;
3086 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3087 *pos++ |= csa_settings->block_tx ?
3088 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3089 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
3090 pos += 2;
3091 put_unaligned_le16(ifmsh->pre_value, pos);
3092 pos += 2;
3093 }
3094
3095 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3096 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3097 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3098 skb_put(skb, 5);
3099 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3100 }
3101
3102 ieee80211_tx_skb(sdata, skb);
3103 return 0;
3104}
3105
3106bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3107{
3108 return !(cs == NULL || cs->cipher == 0 ||
3109 cs->hdr_len < cs->pn_len + cs->pn_off ||
3110 cs->hdr_len <= cs->key_idx_off ||
3111 cs->key_idx_shift > 7 ||
3112 cs->key_idx_mask == 0);
3113}
3114
3115bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3116{
3117 int i;
3118
3119
3120 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3121
3122 for (i = 0; i < n; i++)
3123 if (!ieee80211_cs_valid(&cs[i]))
3124 return false;
3125
3126 return true;
3127}
3128
3129const struct ieee80211_cipher_scheme *
3130ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3131 enum nl80211_iftype iftype)
3132{
3133 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3134 int n = local->hw.n_cipher_schemes;
3135 int i;
3136 const struct ieee80211_cipher_scheme *cs = NULL;
3137
3138 for (i = 0; i < n; i++) {
3139 if (l[i].cipher == cipher) {
3140 cs = &l[i];
3141 break;
3142 }
3143 }
3144
3145 if (!cs || !(cs->iftype & BIT(iftype)))
3146 return NULL;
3147
3148 return cs;
3149}
3150
3151int ieee80211_cs_headroom(struct ieee80211_local *local,
3152 struct cfg80211_crypto_settings *crypto,
3153 enum nl80211_iftype iftype)
3154{
3155 const struct ieee80211_cipher_scheme *cs;
3156 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3157 int i;
3158
3159 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3160 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3161 iftype);
3162
3163 if (cs && headroom < cs->hdr_len)
3164 headroom = cs->hdr_len;
3165 }
3166
3167 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3168 if (cs && headroom < cs->hdr_len)
3169 headroom = cs->hdr_len;
3170
3171 return headroom;
3172}
3173
3174static bool
3175ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3176{
3177 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3178 int skip;
3179
3180 if (end > 0)
3181 return false;
3182
3183
3184 if (data->count[i] == 1)
3185 return false;
3186
3187 if (data->desc[i].interval == 0)
3188 return false;
3189
3190
3191 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3192 if (data->count[i] < 255) {
3193 if (data->count[i] <= skip) {
3194 data->count[i] = 0;
3195 return false;
3196 }
3197
3198 data->count[i] -= skip;
3199 }
3200
3201 data->desc[i].start += skip * data->desc[i].interval;
3202
3203 return true;
3204}
3205
3206static bool
3207ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3208 s32 *offset)
3209{
3210 bool ret = false;
3211 int i;
3212
3213 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3214 s32 cur;
3215
3216 if (!data->count[i])
3217 continue;
3218
3219 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3220 ret = true;
3221
3222 cur = data->desc[i].start - tsf;
3223 if (cur > *offset)
3224 continue;
3225
3226 cur = data->desc[i].start + data->desc[i].duration - tsf;
3227 if (cur > *offset)
3228 *offset = cur;
3229 }
3230
3231 return ret;
3232}
3233
3234static u32
3235ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3236{
3237 s32 offset = 0;
3238 int tries = 0;
3239
3240
3241
3242
3243 int max_tries = 5;
3244
3245 ieee80211_extend_absent_time(data, tsf, &offset);
3246 do {
3247 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3248 break;
3249
3250 tries++;
3251 } while (tries < max_tries);
3252
3253 return offset;
3254}
3255
3256void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3257{
3258 u32 next_offset = BIT(31) - 1;
3259 int i;
3260
3261 data->absent = 0;
3262 data->has_next_tsf = false;
3263 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3264 s32 start;
3265
3266 if (!data->count[i])
3267 continue;
3268
3269 ieee80211_extend_noa_desc(data, tsf, i);
3270 start = data->desc[i].start - tsf;
3271 if (start <= 0)
3272 data->absent |= BIT(i);
3273
3274 if (next_offset > start)
3275 next_offset = start;
3276
3277 data->has_next_tsf = true;
3278 }
3279
3280 if (data->absent)
3281 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3282
3283 data->next_tsf = tsf + next_offset;
3284}
3285EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3286
3287int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3288 struct ieee80211_noa_data *data, u32 tsf)
3289{
3290 int ret = 0;
3291 int i;
3292
3293 memset(data, 0, sizeof(*data));
3294
3295 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3296 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3297
3298 if (!desc->count || !desc->duration)
3299 continue;
3300
3301 data->count[i] = desc->count;
3302 data->desc[i].start = le32_to_cpu(desc->start_time);
3303 data->desc[i].duration = le32_to_cpu(desc->duration);
3304 data->desc[i].interval = le32_to_cpu(desc->interval);
3305
3306 if (data->count[i] > 1 &&
3307 data->desc[i].interval < data->desc[i].duration)
3308 continue;
3309
3310 ieee80211_extend_noa_desc(data, tsf, i);
3311 ret++;
3312 }
3313
3314 if (ret)
3315 ieee80211_update_p2p_noa(data, tsf);
3316
3317 return ret;
3318}
3319EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3320
3321void ieee80211_recalc_dtim(struct ieee80211_local *local,
3322 struct ieee80211_sub_if_data *sdata)
3323{
3324 u64 tsf = drv_get_tsf(local, sdata);
3325 u64 dtim_count = 0;
3326 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3327 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3328 struct ps_data *ps;
3329 u8 bcns_from_dtim;
3330
3331 if (tsf == -1ULL || !beacon_int || !dtim_period)
3332 return;
3333
3334 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3335 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3336 if (!sdata->bss)
3337 return;
3338
3339 ps = &sdata->bss->ps;
3340 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3341 ps = &sdata->u.mesh.ps;
3342 } else {
3343 return;
3344 }
3345
3346
3347
3348
3349
3350
3351 do_div(tsf, beacon_int);
3352 bcns_from_dtim = do_div(tsf, dtim_period);
3353
3354 if (!bcns_from_dtim)
3355 dtim_count = 0;
3356 else
3357 dtim_count = dtim_period - bcns_from_dtim;
3358
3359 ps->dtim_count = dtim_count;
3360}
3361
3362static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3363 struct ieee80211_chanctx *ctx)
3364{
3365 struct ieee80211_sub_if_data *sdata;
3366 u8 radar_detect = 0;
3367
3368 lockdep_assert_held(&local->chanctx_mtx);
3369
3370 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3371 return 0;
3372
3373 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3374 if (sdata->reserved_radar_required)
3375 radar_detect |= BIT(sdata->reserved_chandef.width);
3376
3377
3378
3379
3380
3381 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3382 !list_empty(&ctx->assigned_vifs));
3383
3384 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3385 if (sdata->radar_required)
3386 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3387
3388 return radar_detect;
3389}
3390
3391int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3392 const struct cfg80211_chan_def *chandef,
3393 enum ieee80211_chanctx_mode chanmode,
3394 u8 radar_detect)
3395{
3396 struct ieee80211_local *local = sdata->local;
3397 struct ieee80211_sub_if_data *sdata_iter;
3398 enum nl80211_iftype iftype = sdata->wdev.iftype;
3399 struct ieee80211_chanctx *ctx;
3400 int total = 1;
3401 struct iface_combination_params params = {
3402 .radar_detect = radar_detect,
3403 };
3404
3405 lockdep_assert_held(&local->chanctx_mtx);
3406
3407 if (WARN_ON(hweight32(radar_detect) > 1))
3408 return -EINVAL;
3409
3410 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3411 !chandef->chan))
3412 return -EINVAL;
3413
3414 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3415 return -EINVAL;
3416
3417 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3418 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3419
3420
3421
3422
3423
3424 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3425 }
3426
3427
3428 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3429 if (radar_detect)
3430 return -EINVAL;
3431 return 0;
3432 }
3433
3434 if (chandef)
3435 params.num_different_channels = 1;
3436
3437 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3438 params.iftype_num[iftype] = 1;
3439
3440 list_for_each_entry(ctx, &local->chanctx_list, list) {
3441 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3442 continue;
3443 params.radar_detect |=
3444 ieee80211_chanctx_radar_detect(local, ctx);
3445 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3446 params.num_different_channels++;
3447 continue;
3448 }
3449 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3450 cfg80211_chandef_compatible(chandef,
3451 &ctx->conf.def))
3452 continue;
3453 params.num_different_channels++;
3454 }
3455
3456 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3457 struct wireless_dev *wdev_iter;
3458
3459 wdev_iter = &sdata_iter->wdev;
3460
3461 if (sdata_iter == sdata ||
3462 !ieee80211_sdata_running(sdata_iter) ||
3463 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3464 continue;
3465
3466 params.iftype_num[wdev_iter->iftype]++;
3467 total++;
3468 }
3469
3470 if (total == 1 && !params.radar_detect)
3471 return 0;
3472
3473 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3474}
3475
3476static void
3477ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3478 void *data)
3479{
3480 u32 *max_num_different_channels = data;
3481
3482 *max_num_different_channels = max(*max_num_different_channels,
3483 c->num_different_channels);
3484}
3485
3486int ieee80211_max_num_channels(struct ieee80211_local *local)
3487{
3488 struct ieee80211_sub_if_data *sdata;
3489 struct ieee80211_chanctx *ctx;
3490 u32 max_num_different_channels = 1;
3491 int err;
3492 struct iface_combination_params params = {0};
3493
3494 lockdep_assert_held(&local->chanctx_mtx);
3495
3496 list_for_each_entry(ctx, &local->chanctx_list, list) {
3497 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3498 continue;
3499
3500 params.num_different_channels++;
3501
3502 params.radar_detect |=
3503 ieee80211_chanctx_radar_detect(local, ctx);
3504 }
3505
3506 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3507 params.iftype_num[sdata->wdev.iftype]++;
3508
3509 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3510 ieee80211_iter_max_chans,
3511 &max_num_different_channels);
3512 if (err < 0)
3513 return err;
3514
3515 return max_num_different_channels;
3516}
3517
3518u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3519{
3520 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3521 *buf++ = 7;
3522 *buf++ = 0x00;
3523 *buf++ = 0x50;
3524 *buf++ = 0xf2;
3525 *buf++ = 2;
3526 *buf++ = 0;
3527 *buf++ = 1;
3528 *buf++ = qosinfo;
3529
3530 return buf;
3531}
3532
3533void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3534 unsigned long *frame_cnt,
3535 unsigned long *byte_cnt)
3536{
3537 struct txq_info *txqi = to_txq_info(txq);
3538 u32 frag_cnt = 0, frag_bytes = 0;
3539 struct sk_buff *skb;
3540
3541 skb_queue_walk(&txqi->frags, skb) {
3542 frag_cnt++;
3543 frag_bytes += skb->len;
3544 }
3545
3546 if (frame_cnt)
3547 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3548
3549 if (byte_cnt)
3550 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3551}
3552EXPORT_SYMBOL(ieee80211_txq_get_depth);
3553
3554const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3555 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3556 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3557 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3558 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3559};
3560