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TOMOYO Linux Cross Reference
Linux/net/mac80211/util.c

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  1 /*
  2  * Copyright 2002-2005, Instant802 Networks, Inc.
  3  * Copyright 2005-2006, Devicescape Software, Inc.
  4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
  5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
  6  * Copyright 2013-2014  Intel Mobile Communications GmbH
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License version 2 as
 10  * published by the Free Software Foundation.
 11  *
 12  * utilities for mac80211
 13  */
 14 
 15 #include <net/mac80211.h>
 16 #include <linux/netdevice.h>
 17 #include <linux/export.h>
 18 #include <linux/types.h>
 19 #include <linux/slab.h>
 20 #include <linux/skbuff.h>
 21 #include <linux/etherdevice.h>
 22 #include <linux/if_arp.h>
 23 #include <linux/bitmap.h>
 24 #include <linux/crc32.h>
 25 #include <net/net_namespace.h>
 26 #include <net/cfg80211.h>
 27 #include <net/rtnetlink.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 
 40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
 41 {
 42         struct ieee80211_local *local;
 43         BUG_ON(!wiphy);
 44 
 45         local = wiphy_priv(wiphy);
 46         return &local->hw;
 47 }
 48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
 49 
 50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 51                         enum nl80211_iftype type)
 52 {
 53         __le16 fc = hdr->frame_control;
 54 
 55          /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
 56         if (len < 16)
 57                 return NULL;
 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_mgmt(fc)) {
 74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
 75                         return NULL;
 76                 return hdr->addr3;
 77         }
 78 
 79         if (ieee80211_is_ctl(fc)) {
 80                 if (ieee80211_is_pspoll(fc))
 81                         return hdr->addr1;
 82 
 83                 if (ieee80211_is_back_req(fc)) {
 84                         switch (type) {
 85                         case NL80211_IFTYPE_STATION:
 86                                 return hdr->addr2;
 87                         case NL80211_IFTYPE_AP:
 88                         case NL80211_IFTYPE_AP_VLAN:
 89                                 return hdr->addr1;
 90                         default:
 91                                 break; /* fall through to the return */
 92                         }
 93                 }
 94         }
 95 
 96         return NULL;
 97 }
 98 
 99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
100 {
101         struct sk_buff *skb;
102         struct ieee80211_hdr *hdr;
103 
104         skb_queue_walk(&tx->skbs, skb) {
105                 hdr = (struct ieee80211_hdr *) skb->data;
106                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
107         }
108 }
109 
110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
111                              int rate, int erp, int short_preamble,
112                              int shift)
113 {
114         int dur;
115 
116         /* calculate duration (in microseconds, rounded up to next higher
117          * integer if it includes a fractional microsecond) to send frame of
118          * len bytes (does not include FCS) at the given rate. Duration will
119          * also include SIFS.
120          *
121          * rate is in 100 kbps, so divident is multiplied by 10 in the
122          * DIV_ROUND_UP() operations.
123          *
124          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125          * is assumed to be 0 otherwise.
126          */
127 
128         if (band == IEEE80211_BAND_5GHZ || erp) {
129                 /*
130                  * OFDM:
131                  *
132                  * N_DBPS = DATARATE x 4
133                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134                  *      (16 = SIGNAL time, 6 = tail bits)
135                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136                  *
137                  * T_SYM = 4 usec
138                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
139                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140                  *      signal ext = 6 usec
141                  */
142                 dur = 16; /* SIFS + signal ext */
143                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
145 
146                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147                  *  * times 4 for 5 MHz
148                  *  * times 2 for 10 MHz
149                  */
150                 dur *= 1 << shift;
151 
152                 /* rates should already consider the channel bandwidth,
153                  * don't apply divisor again.
154                  */
155                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156                                         4 * rate); /* T_SYM x N_SYM */
157         } else {
158                 /*
159                  * 802.11b or 802.11g with 802.11b compatibility:
160                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162                  *
163                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164                  * aSIFSTime = 10 usec
165                  * aPreambleLength = 144 usec or 72 usec with short preamble
166                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167                  */
168                 dur = 10; /* aSIFSTime = 10 usec */
169                 dur += short_preamble ? (72 + 24) : (144 + 48);
170 
171                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172         }
173 
174         return dur;
175 }
176 
177 /* Exported duration function for driver use */
178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179                                         struct ieee80211_vif *vif,
180                                         enum ieee80211_band band,
181                                         size_t frame_len,
182                                         struct ieee80211_rate *rate)
183 {
184         struct ieee80211_sub_if_data *sdata;
185         u16 dur;
186         int erp, shift = 0;
187         bool short_preamble = false;
188 
189         erp = 0;
190         if (vif) {
191                 sdata = vif_to_sdata(vif);
192                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
193                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194                         erp = rate->flags & IEEE80211_RATE_ERP_G;
195                 shift = ieee80211_vif_get_shift(vif);
196         }
197 
198         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
199                                        short_preamble, shift);
200 
201         return cpu_to_le16(dur);
202 }
203 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204 
205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206                               struct ieee80211_vif *vif, size_t frame_len,
207                               const struct ieee80211_tx_info *frame_txctl)
208 {
209         struct ieee80211_local *local = hw_to_local(hw);
210         struct ieee80211_rate *rate;
211         struct ieee80211_sub_if_data *sdata;
212         bool short_preamble;
213         int erp, shift = 0, bitrate;
214         u16 dur;
215         struct ieee80211_supported_band *sband;
216 
217         sband = local->hw.wiphy->bands[frame_txctl->band];
218 
219         short_preamble = false;
220 
221         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
222 
223         erp = 0;
224         if (vif) {
225                 sdata = vif_to_sdata(vif);
226                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
227                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228                         erp = rate->flags & IEEE80211_RATE_ERP_G;
229                 shift = ieee80211_vif_get_shift(vif);
230         }
231 
232         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233 
234         /* CTS duration */
235         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
236                                        erp, short_preamble, shift);
237         /* Data frame duration */
238         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
239                                         erp, short_preamble, shift);
240         /* ACK duration */
241         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
242                                         erp, short_preamble, shift);
243 
244         return cpu_to_le16(dur);
245 }
246 EXPORT_SYMBOL(ieee80211_rts_duration);
247 
248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249                                     struct ieee80211_vif *vif,
250                                     size_t frame_len,
251                                     const struct ieee80211_tx_info *frame_txctl)
252 {
253         struct ieee80211_local *local = hw_to_local(hw);
254         struct ieee80211_rate *rate;
255         struct ieee80211_sub_if_data *sdata;
256         bool short_preamble;
257         int erp, shift = 0, bitrate;
258         u16 dur;
259         struct ieee80211_supported_band *sband;
260 
261         sband = local->hw.wiphy->bands[frame_txctl->band];
262 
263         short_preamble = false;
264 
265         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
266         erp = 0;
267         if (vif) {
268                 sdata = vif_to_sdata(vif);
269                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
270                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271                         erp = rate->flags & IEEE80211_RATE_ERP_G;
272                 shift = ieee80211_vif_get_shift(vif);
273         }
274 
275         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276 
277         /* Data frame duration */
278         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
279                                        erp, short_preamble, shift);
280         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
281                 /* ACK duration */
282                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
283                                                 erp, short_preamble, shift);
284         }
285 
286         return cpu_to_le16(dur);
287 }
288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289 
290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291 {
292         struct ieee80211_sub_if_data *sdata;
293         int n_acs = IEEE80211_NUM_ACS;
294 
295         if (local->hw.queues < IEEE80211_NUM_ACS)
296                 n_acs = 1;
297 
298         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299                 int ac;
300 
301                 if (!sdata->dev)
302                         continue;
303 
304                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306                         continue;
307 
308                 for (ac = 0; ac < n_acs; ac++) {
309                         int ac_queue = sdata->vif.hw_queue[ac];
310 
311                         if (ac_queue == queue ||
312                             (sdata->vif.cab_queue == queue &&
313                              local->queue_stop_reasons[ac_queue] == 0 &&
314                              skb_queue_empty(&local->pending[ac_queue])))
315                                 netif_wake_subqueue(sdata->dev, ac);
316                 }
317         }
318 }
319 
320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
321                                    enum queue_stop_reason reason,
322                                    bool refcounted)
323 {
324         struct ieee80211_local *local = hw_to_local(hw);
325 
326         trace_wake_queue(local, queue, reason);
327 
328         if (WARN_ON(queue >= hw->queues))
329                 return;
330 
331         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332                 return;
333 
334         if (!refcounted)
335                 local->q_stop_reasons[queue][reason] = 0;
336         else
337                 local->q_stop_reasons[queue][reason]--;
338 
339         if (local->q_stop_reasons[queue][reason] == 0)
340                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
341 
342         if (local->queue_stop_reasons[queue] != 0)
343                 /* someone still has this queue stopped */
344                 return;
345 
346         if (skb_queue_empty(&local->pending[queue])) {
347                 rcu_read_lock();
348                 ieee80211_propagate_queue_wake(local, queue);
349                 rcu_read_unlock();
350         } else
351                 tasklet_schedule(&local->tx_pending_tasklet);
352 }
353 
354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
355                                     enum queue_stop_reason reason,
356                                     bool refcounted)
357 {
358         struct ieee80211_local *local = hw_to_local(hw);
359         unsigned long flags;
360 
361         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362         __ieee80211_wake_queue(hw, queue, reason, refcounted);
363         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364 }
365 
366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367 {
368         ieee80211_wake_queue_by_reason(hw, queue,
369                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
370                                        false);
371 }
372 EXPORT_SYMBOL(ieee80211_wake_queue);
373 
374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
375                                    enum queue_stop_reason reason,
376                                    bool refcounted)
377 {
378         struct ieee80211_local *local = hw_to_local(hw);
379         struct ieee80211_sub_if_data *sdata;
380         int n_acs = IEEE80211_NUM_ACS;
381 
382         trace_stop_queue(local, queue, reason);
383 
384         if (WARN_ON(queue >= hw->queues))
385                 return;
386 
387         if (!refcounted)
388                 local->q_stop_reasons[queue][reason] = 1;
389         else
390                 local->q_stop_reasons[queue][reason]++;
391 
392         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393                 return;
394 
395         if (local->hw.queues < IEEE80211_NUM_ACS)
396                 n_acs = 1;
397 
398         rcu_read_lock();
399         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400                 int ac;
401 
402                 if (!sdata->dev)
403                         continue;
404 
405                 for (ac = 0; ac < n_acs; ac++) {
406                         if (sdata->vif.hw_queue[ac] == queue ||
407                             sdata->vif.cab_queue == queue)
408                                 netif_stop_subqueue(sdata->dev, ac);
409                 }
410         }
411         rcu_read_unlock();
412 }
413 
414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
415                                     enum queue_stop_reason reason,
416                                     bool refcounted)
417 {
418         struct ieee80211_local *local = hw_to_local(hw);
419         unsigned long flags;
420 
421         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
422         __ieee80211_stop_queue(hw, queue, reason, refcounted);
423         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424 }
425 
426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427 {
428         ieee80211_stop_queue_by_reason(hw, queue,
429                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
430                                        false);
431 }
432 EXPORT_SYMBOL(ieee80211_stop_queue);
433 
434 void ieee80211_add_pending_skb(struct ieee80211_local *local,
435                                struct sk_buff *skb)
436 {
437         struct ieee80211_hw *hw = &local->hw;
438         unsigned long flags;
439         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
440         int queue = info->hw_queue;
441 
442         if (WARN_ON(!info->control.vif)) {
443                 ieee80211_free_txskb(&local->hw, skb);
444                 return;
445         }
446 
447         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
448         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449                                false);
450         __skb_queue_tail(&local->pending[queue], skb);
451         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452                                false);
453         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454 }
455 
456 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457                                 struct sk_buff_head *skbs)
458 {
459         struct ieee80211_hw *hw = &local->hw;
460         struct sk_buff *skb;
461         unsigned long flags;
462         int queue, i;
463 
464         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
465         while ((skb = skb_dequeue(skbs))) {
466                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467 
468                 if (WARN_ON(!info->control.vif)) {
469                         ieee80211_free_txskb(&local->hw, skb);
470                         continue;
471                 }
472 
473                 queue = info->hw_queue;
474 
475                 __ieee80211_stop_queue(hw, queue,
476                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477                                 false);
478 
479                 __skb_queue_tail(&local->pending[queue], skb);
480         }
481 
482         for (i = 0; i < hw->queues; i++)
483                 __ieee80211_wake_queue(hw, i,
484                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485                         false);
486         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
487 }
488 
489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
490                                      unsigned long queues,
491                                      enum queue_stop_reason reason,
492                                      bool refcounted)
493 {
494         struct ieee80211_local *local = hw_to_local(hw);
495         unsigned long flags;
496         int i;
497 
498         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499 
500         for_each_set_bit(i, &queues, hw->queues)
501                 __ieee80211_stop_queue(hw, i, reason, refcounted);
502 
503         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504 }
505 
506 void ieee80211_stop_queues(struct ieee80211_hw *hw)
507 {
508         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
509                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
510                                         false);
511 }
512 EXPORT_SYMBOL(ieee80211_stop_queues);
513 
514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515 {
516         struct ieee80211_local *local = hw_to_local(hw);
517         unsigned long flags;
518         int ret;
519 
520         if (WARN_ON(queue >= hw->queues))
521                 return true;
522 
523         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
524         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525                        &local->queue_stop_reasons[queue]);
526         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527         return ret;
528 }
529 EXPORT_SYMBOL(ieee80211_queue_stopped);
530 
531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
532                                      unsigned long queues,
533                                      enum queue_stop_reason reason,
534                                      bool refcounted)
535 {
536         struct ieee80211_local *local = hw_to_local(hw);
537         unsigned long flags;
538         int i;
539 
540         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541 
542         for_each_set_bit(i, &queues, hw->queues)
543                 __ieee80211_wake_queue(hw, i, reason, refcounted);
544 
545         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546 }
547 
548 void ieee80211_wake_queues(struct ieee80211_hw *hw)
549 {
550         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
551                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
552                                         false);
553 }
554 EXPORT_SYMBOL(ieee80211_wake_queues);
555 
556 static unsigned int
557 ieee80211_get_vif_queues(struct ieee80211_local *local,
558                          struct ieee80211_sub_if_data *sdata)
559 {
560         unsigned int queues;
561 
562         if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563                 int ac;
564 
565                 queues = 0;
566 
567                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568                         queues |= BIT(sdata->vif.hw_queue[ac]);
569                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570                         queues |= BIT(sdata->vif.cab_queue);
571         } else {
572                 /* all queues */
573                 queues = BIT(local->hw.queues) - 1;
574         }
575 
576         return queues;
577 }
578 
579 void __ieee80211_flush_queues(struct ieee80211_local *local,
580                               struct ieee80211_sub_if_data *sdata,
581                               unsigned int queues, bool drop)
582 {
583         if (!local->ops->flush)
584                 return;
585 
586         /*
587          * If no queue was set, or if the HW doesn't support
588          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
589          */
590         if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591                 queues = ieee80211_get_vif_queues(local, sdata);
592 
593         ieee80211_stop_queues_by_reason(&local->hw, queues,
594                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
595                                         false);
596 
597         drv_flush(local, sdata, queues, drop);
598 
599         ieee80211_wake_queues_by_reason(&local->hw, queues,
600                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
601                                         false);
602 }
603 
604 void ieee80211_flush_queues(struct ieee80211_local *local,
605                             struct ieee80211_sub_if_data *sdata, bool drop)
606 {
607         __ieee80211_flush_queues(local, sdata, 0, drop);
608 }
609 
610 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611                                struct ieee80211_sub_if_data *sdata,
612                                enum queue_stop_reason reason)
613 {
614         ieee80211_stop_queues_by_reason(&local->hw,
615                                         ieee80211_get_vif_queues(local, sdata),
616                                         reason, true);
617 }
618 
619 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620                                struct ieee80211_sub_if_data *sdata,
621                                enum queue_stop_reason reason)
622 {
623         ieee80211_wake_queues_by_reason(&local->hw,
624                                         ieee80211_get_vif_queues(local, sdata),
625                                         reason, true);
626 }
627 
628 static void __iterate_active_interfaces(struct ieee80211_local *local,
629                                         u32 iter_flags,
630                                         void (*iterator)(void *data, u8 *mac,
631                                                 struct ieee80211_vif *vif),
632                                         void *data)
633 {
634         struct ieee80211_sub_if_data *sdata;
635 
636         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
637                 switch (sdata->vif.type) {
638                 case NL80211_IFTYPE_MONITOR:
639                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
640                                 continue;
641                         break;
642                 case NL80211_IFTYPE_AP_VLAN:
643                         continue;
644                 default:
645                         break;
646                 }
647                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
648                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
649                         continue;
650                 if (ieee80211_sdata_running(sdata))
651                         iterator(data, sdata->vif.addr,
652                                  &sdata->vif);
653         }
654 
655         sdata = rcu_dereference_check(local->monitor_sdata,
656                                       lockdep_is_held(&local->iflist_mtx) ||
657                                       lockdep_rtnl_is_held());
658         if (sdata &&
659             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
660              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
661                 iterator(data, sdata->vif.addr, &sdata->vif);
662 }
663 
664 void ieee80211_iterate_active_interfaces(
665         struct ieee80211_hw *hw, u32 iter_flags,
666         void (*iterator)(void *data, u8 *mac,
667                          struct ieee80211_vif *vif),
668         void *data)
669 {
670         struct ieee80211_local *local = hw_to_local(hw);
671 
672         mutex_lock(&local->iflist_mtx);
673         __iterate_active_interfaces(local, iter_flags, iterator, data);
674         mutex_unlock(&local->iflist_mtx);
675 }
676 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
677 
678 void ieee80211_iterate_active_interfaces_atomic(
679         struct ieee80211_hw *hw, u32 iter_flags,
680         void (*iterator)(void *data, u8 *mac,
681                          struct ieee80211_vif *vif),
682         void *data)
683 {
684         struct ieee80211_local *local = hw_to_local(hw);
685 
686         rcu_read_lock();
687         __iterate_active_interfaces(local, iter_flags, iterator, data);
688         rcu_read_unlock();
689 }
690 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
691 
692 void ieee80211_iterate_active_interfaces_rtnl(
693         struct ieee80211_hw *hw, u32 iter_flags,
694         void (*iterator)(void *data, u8 *mac,
695                          struct ieee80211_vif *vif),
696         void *data)
697 {
698         struct ieee80211_local *local = hw_to_local(hw);
699 
700         ASSERT_RTNL();
701 
702         __iterate_active_interfaces(local, iter_flags, iterator, data);
703 }
704 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
705 
706 static void __iterate_stations(struct ieee80211_local *local,
707                                void (*iterator)(void *data,
708                                                 struct ieee80211_sta *sta),
709                                void *data)
710 {
711         struct sta_info *sta;
712 
713         list_for_each_entry_rcu(sta, &local->sta_list, list) {
714                 if (!sta->uploaded)
715                         continue;
716 
717                 iterator(data, &sta->sta);
718         }
719 }
720 
721 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
722                         void (*iterator)(void *data,
723                                          struct ieee80211_sta *sta),
724                         void *data)
725 {
726         struct ieee80211_local *local = hw_to_local(hw);
727 
728         rcu_read_lock();
729         __iterate_stations(local, iterator, data);
730         rcu_read_unlock();
731 }
732 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
733 
734 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
735 {
736         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
737 
738         if (!ieee80211_sdata_running(sdata) ||
739             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
740                 return NULL;
741         return &sdata->vif;
742 }
743 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
744 
745 /*
746  * Nothing should have been stuffed into the workqueue during
747  * the suspend->resume cycle. Since we can't check each caller
748  * of this function if we are already quiescing / suspended,
749  * check here and don't WARN since this can actually happen when
750  * the rx path (for example) is racing against __ieee80211_suspend
751  * and suspending / quiescing was set after the rx path checked
752  * them.
753  */
754 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
755 {
756         if (local->quiescing || (local->suspended && !local->resuming)) {
757                 pr_warn("queueing ieee80211 work while going to suspend\n");
758                 return false;
759         }
760 
761         return true;
762 }
763 
764 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
765 {
766         struct ieee80211_local *local = hw_to_local(hw);
767 
768         if (!ieee80211_can_queue_work(local))
769                 return;
770 
771         queue_work(local->workqueue, work);
772 }
773 EXPORT_SYMBOL(ieee80211_queue_work);
774 
775 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
776                                   struct delayed_work *dwork,
777                                   unsigned long delay)
778 {
779         struct ieee80211_local *local = hw_to_local(hw);
780 
781         if (!ieee80211_can_queue_work(local))
782                 return;
783 
784         queue_delayed_work(local->workqueue, dwork, delay);
785 }
786 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
787 
788 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
789                                struct ieee802_11_elems *elems,
790                                u64 filter, u32 crc)
791 {
792         size_t left = len;
793         const u8 *pos = start;
794         bool calc_crc = filter != 0;
795         DECLARE_BITMAP(seen_elems, 256);
796         const u8 *ie;
797 
798         bitmap_zero(seen_elems, 256);
799         memset(elems, 0, sizeof(*elems));
800         elems->ie_start = start;
801         elems->total_len = len;
802 
803         while (left >= 2) {
804                 u8 id, elen;
805                 bool elem_parse_failed;
806 
807                 id = *pos++;
808                 elen = *pos++;
809                 left -= 2;
810 
811                 if (elen > left) {
812                         elems->parse_error = true;
813                         break;
814                 }
815 
816                 switch (id) {
817                 case WLAN_EID_SSID:
818                 case WLAN_EID_SUPP_RATES:
819                 case WLAN_EID_FH_PARAMS:
820                 case WLAN_EID_DS_PARAMS:
821                 case WLAN_EID_CF_PARAMS:
822                 case WLAN_EID_TIM:
823                 case WLAN_EID_IBSS_PARAMS:
824                 case WLAN_EID_CHALLENGE:
825                 case WLAN_EID_RSN:
826                 case WLAN_EID_ERP_INFO:
827                 case WLAN_EID_EXT_SUPP_RATES:
828                 case WLAN_EID_HT_CAPABILITY:
829                 case WLAN_EID_HT_OPERATION:
830                 case WLAN_EID_VHT_CAPABILITY:
831                 case WLAN_EID_VHT_OPERATION:
832                 case WLAN_EID_MESH_ID:
833                 case WLAN_EID_MESH_CONFIG:
834                 case WLAN_EID_PEER_MGMT:
835                 case WLAN_EID_PREQ:
836                 case WLAN_EID_PREP:
837                 case WLAN_EID_PERR:
838                 case WLAN_EID_RANN:
839                 case WLAN_EID_CHANNEL_SWITCH:
840                 case WLAN_EID_EXT_CHANSWITCH_ANN:
841                 case WLAN_EID_COUNTRY:
842                 case WLAN_EID_PWR_CONSTRAINT:
843                 case WLAN_EID_TIMEOUT_INTERVAL:
844                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
845                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
846                 case WLAN_EID_CHAN_SWITCH_PARAM:
847                 case WLAN_EID_EXT_CAPABILITY:
848                 case WLAN_EID_CHAN_SWITCH_TIMING:
849                 case WLAN_EID_LINK_ID:
850                 /*
851                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
852                  * that if the content gets bigger it might be needed more than once
853                  */
854                         if (test_bit(id, seen_elems)) {
855                                 elems->parse_error = true;
856                                 left -= elen;
857                                 pos += elen;
858                                 continue;
859                         }
860                         break;
861                 }
862 
863                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
864                         crc = crc32_be(crc, pos - 2, elen + 2);
865 
866                 elem_parse_failed = false;
867 
868                 switch (id) {
869                 case WLAN_EID_LINK_ID:
870                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
871                                 elem_parse_failed = true;
872                                 break;
873                         }
874                         elems->lnk_id = (void *)(pos - 2);
875                         break;
876                 case WLAN_EID_CHAN_SWITCH_TIMING:
877                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
878                                 elem_parse_failed = true;
879                                 break;
880                         }
881                         elems->ch_sw_timing = (void *)pos;
882                         break;
883                 case WLAN_EID_EXT_CAPABILITY:
884                         elems->ext_capab = pos;
885                         elems->ext_capab_len = elen;
886                         break;
887                 case WLAN_EID_SSID:
888                         elems->ssid = pos;
889                         elems->ssid_len = elen;
890                         break;
891                 case WLAN_EID_SUPP_RATES:
892                         elems->supp_rates = pos;
893                         elems->supp_rates_len = elen;
894                         break;
895                 case WLAN_EID_DS_PARAMS:
896                         if (elen >= 1)
897                                 elems->ds_params = pos;
898                         else
899                                 elem_parse_failed = true;
900                         break;
901                 case WLAN_EID_TIM:
902                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
903                                 elems->tim = (void *)pos;
904                                 elems->tim_len = elen;
905                         } else
906                                 elem_parse_failed = true;
907                         break;
908                 case WLAN_EID_CHALLENGE:
909                         elems->challenge = pos;
910                         elems->challenge_len = elen;
911                         break;
912                 case WLAN_EID_VENDOR_SPECIFIC:
913                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
914                             pos[2] == 0xf2) {
915                                 /* Microsoft OUI (00:50:F2) */
916 
917                                 if (calc_crc)
918                                         crc = crc32_be(crc, pos - 2, elen + 2);
919 
920                                 if (elen >= 5 && pos[3] == 2) {
921                                         /* OUI Type 2 - WMM IE */
922                                         if (pos[4] == 0) {
923                                                 elems->wmm_info = pos;
924                                                 elems->wmm_info_len = elen;
925                                         } else if (pos[4] == 1) {
926                                                 elems->wmm_param = pos;
927                                                 elems->wmm_param_len = elen;
928                                         }
929                                 }
930                         }
931                         break;
932                 case WLAN_EID_RSN:
933                         elems->rsn = pos;
934                         elems->rsn_len = elen;
935                         break;
936                 case WLAN_EID_ERP_INFO:
937                         if (elen >= 1)
938                                 elems->erp_info = pos;
939                         else
940                                 elem_parse_failed = true;
941                         break;
942                 case WLAN_EID_EXT_SUPP_RATES:
943                         elems->ext_supp_rates = pos;
944                         elems->ext_supp_rates_len = elen;
945                         break;
946                 case WLAN_EID_HT_CAPABILITY:
947                         if (elen >= sizeof(struct ieee80211_ht_cap))
948                                 elems->ht_cap_elem = (void *)pos;
949                         else
950                                 elem_parse_failed = true;
951                         break;
952                 case WLAN_EID_HT_OPERATION:
953                         if (elen >= sizeof(struct ieee80211_ht_operation))
954                                 elems->ht_operation = (void *)pos;
955                         else
956                                 elem_parse_failed = true;
957                         break;
958                 case WLAN_EID_VHT_CAPABILITY:
959                         if (elen >= sizeof(struct ieee80211_vht_cap))
960                                 elems->vht_cap_elem = (void *)pos;
961                         else
962                                 elem_parse_failed = true;
963                         break;
964                 case WLAN_EID_VHT_OPERATION:
965                         if (elen >= sizeof(struct ieee80211_vht_operation))
966                                 elems->vht_operation = (void *)pos;
967                         else
968                                 elem_parse_failed = true;
969                         break;
970                 case WLAN_EID_OPMODE_NOTIF:
971                         if (elen > 0)
972                                 elems->opmode_notif = pos;
973                         else
974                                 elem_parse_failed = true;
975                         break;
976                 case WLAN_EID_MESH_ID:
977                         elems->mesh_id = pos;
978                         elems->mesh_id_len = elen;
979                         break;
980                 case WLAN_EID_MESH_CONFIG:
981                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
982                                 elems->mesh_config = (void *)pos;
983                         else
984                                 elem_parse_failed = true;
985                         break;
986                 case WLAN_EID_PEER_MGMT:
987                         elems->peering = pos;
988                         elems->peering_len = elen;
989                         break;
990                 case WLAN_EID_MESH_AWAKE_WINDOW:
991                         if (elen >= 2)
992                                 elems->awake_window = (void *)pos;
993                         break;
994                 case WLAN_EID_PREQ:
995                         elems->preq = pos;
996                         elems->preq_len = elen;
997                         break;
998                 case WLAN_EID_PREP:
999                         elems->prep = pos;
1000                         elems->prep_len = elen;
1001                         break;
1002                 case WLAN_EID_PERR:
1003                         elems->perr = pos;
1004                         elems->perr_len = elen;
1005                         break;
1006                 case WLAN_EID_RANN:
1007                         if (elen >= sizeof(struct ieee80211_rann_ie))
1008                                 elems->rann = (void *)pos;
1009                         else
1010                                 elem_parse_failed = true;
1011                         break;
1012                 case WLAN_EID_CHANNEL_SWITCH:
1013                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1014                                 elem_parse_failed = true;
1015                                 break;
1016                         }
1017                         elems->ch_switch_ie = (void *)pos;
1018                         break;
1019                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1020                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1021                                 elem_parse_failed = true;
1022                                 break;
1023                         }
1024                         elems->ext_chansw_ie = (void *)pos;
1025                         break;
1026                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1027                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1028                                 elem_parse_failed = true;
1029                                 break;
1030                         }
1031                         elems->sec_chan_offs = (void *)pos;
1032                         break;
1033                 case WLAN_EID_CHAN_SWITCH_PARAM:
1034                         if (elen !=
1035                             sizeof(*elems->mesh_chansw_params_ie)) {
1036                                 elem_parse_failed = true;
1037                                 break;
1038                         }
1039                         elems->mesh_chansw_params_ie = (void *)pos;
1040                         break;
1041                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1042                         if (!action ||
1043                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1044                                 elem_parse_failed = true;
1045                                 break;
1046                         }
1047                         elems->wide_bw_chansw_ie = (void *)pos;
1048                         break;
1049                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1050                         if (action) {
1051                                 elem_parse_failed = true;
1052                                 break;
1053                         }
1054                         /*
1055                          * This is a bit tricky, but as we only care about
1056                          * the wide bandwidth channel switch element, so
1057                          * just parse it out manually.
1058                          */
1059                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1060                                               pos, elen);
1061                         if (ie) {
1062                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1063                                         elems->wide_bw_chansw_ie =
1064                                                 (void *)(ie + 2);
1065                                 else
1066                                         elem_parse_failed = true;
1067                         }
1068                         break;
1069                 case WLAN_EID_COUNTRY:
1070                         elems->country_elem = pos;
1071                         elems->country_elem_len = elen;
1072                         break;
1073                 case WLAN_EID_PWR_CONSTRAINT:
1074                         if (elen != 1) {
1075                                 elem_parse_failed = true;
1076                                 break;
1077                         }
1078                         elems->pwr_constr_elem = pos;
1079                         break;
1080                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1081                         /* Lots of different options exist, but we only care
1082                          * about the Dynamic Transmit Power Control element.
1083                          * First check for the Cisco OUI, then for the DTPC
1084                          * tag (0x00).
1085                          */
1086                         if (elen < 4) {
1087                                 elem_parse_failed = true;
1088                                 break;
1089                         }
1090 
1091                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1092                             pos[2] != 0x96 || pos[3] != 0x00)
1093                                 break;
1094 
1095                         if (elen != 6) {
1096                                 elem_parse_failed = true;
1097                                 break;
1098                         }
1099 
1100                         if (calc_crc)
1101                                 crc = crc32_be(crc, pos - 2, elen + 2);
1102 
1103                         elems->cisco_dtpc_elem = pos;
1104                         break;
1105                 case WLAN_EID_TIMEOUT_INTERVAL:
1106                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1107                                 elems->timeout_int = (void *)pos;
1108                         else
1109                                 elem_parse_failed = true;
1110                         break;
1111                 default:
1112                         break;
1113                 }
1114 
1115                 if (elem_parse_failed)
1116                         elems->parse_error = true;
1117                 else
1118                         __set_bit(id, seen_elems);
1119 
1120                 left -= elen;
1121                 pos += elen;
1122         }
1123 
1124         if (left != 0)
1125                 elems->parse_error = true;
1126 
1127         return crc;
1128 }
1129 
1130 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1131                                bool bss_notify)
1132 {
1133         struct ieee80211_local *local = sdata->local;
1134         struct ieee80211_tx_queue_params qparam;
1135         struct ieee80211_chanctx_conf *chanctx_conf;
1136         int ac;
1137         bool use_11b, enable_qos;
1138         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1139         int aCWmin, aCWmax;
1140 
1141         if (!local->ops->conf_tx)
1142                 return;
1143 
1144         if (local->hw.queues < IEEE80211_NUM_ACS)
1145                 return;
1146 
1147         memset(&qparam, 0, sizeof(qparam));
1148 
1149         rcu_read_lock();
1150         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1151         use_11b = (chanctx_conf &&
1152                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1153                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1154         rcu_read_unlock();
1155 
1156         /*
1157          * By default disable QoS in STA mode for old access points, which do
1158          * not support 802.11e. New APs will provide proper queue parameters,
1159          * that we will configure later.
1160          */
1161         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1162 
1163         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1164 
1165         /* Set defaults according to 802.11-2007 Table 7-37 */
1166         aCWmax = 1023;
1167         if (use_11b)
1168                 aCWmin = 31;
1169         else
1170                 aCWmin = 15;
1171 
1172         /* Confiure old 802.11b/g medium access rules. */
1173         qparam.cw_max = aCWmax;
1174         qparam.cw_min = aCWmin;
1175         qparam.txop = 0;
1176         qparam.aifs = 2;
1177 
1178         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1179                 /* Update if QoS is enabled. */
1180                 if (enable_qos) {
1181                         switch (ac) {
1182                         case IEEE80211_AC_BK:
1183                                 qparam.cw_max = aCWmax;
1184                                 qparam.cw_min = aCWmin;
1185                                 qparam.txop = 0;
1186                                 if (is_ocb)
1187                                         qparam.aifs = 9;
1188                                 else
1189                                         qparam.aifs = 7;
1190                                 break;
1191                         /* never happens but let's not leave undefined */
1192                         default:
1193                         case IEEE80211_AC_BE:
1194                                 qparam.cw_max = aCWmax;
1195                                 qparam.cw_min = aCWmin;
1196                                 qparam.txop = 0;
1197                                 if (is_ocb)
1198                                         qparam.aifs = 6;
1199                                 else
1200                                         qparam.aifs = 3;
1201                                 break;
1202                         case IEEE80211_AC_VI:
1203                                 qparam.cw_max = aCWmin;
1204                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1205                                 if (is_ocb)
1206                                         qparam.txop = 0;
1207                                 else if (use_11b)
1208                                         qparam.txop = 6016/32;
1209                                 else
1210                                         qparam.txop = 3008/32;
1211 
1212                                 if (is_ocb)
1213                                         qparam.aifs = 3;
1214                                 else
1215                                         qparam.aifs = 2;
1216                                 break;
1217                         case IEEE80211_AC_VO:
1218                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1219                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1220                                 if (is_ocb)
1221                                         qparam.txop = 0;
1222                                 else if (use_11b)
1223                                         qparam.txop = 3264/32;
1224                                 else
1225                                         qparam.txop = 1504/32;
1226                                 qparam.aifs = 2;
1227                                 break;
1228                         }
1229                 }
1230 
1231                 qparam.uapsd = false;
1232 
1233                 sdata->tx_conf[ac] = qparam;
1234                 drv_conf_tx(local, sdata, ac, &qparam);
1235         }
1236 
1237         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1238             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1239                 sdata->vif.bss_conf.qos = enable_qos;
1240                 if (bss_notify)
1241                         ieee80211_bss_info_change_notify(sdata,
1242                                                          BSS_CHANGED_QOS);
1243         }
1244 }
1245 
1246 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1247                          u16 transaction, u16 auth_alg, u16 status,
1248                          const u8 *extra, size_t extra_len, const u8 *da,
1249                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1250                          u32 tx_flags)
1251 {
1252         struct ieee80211_local *local = sdata->local;
1253         struct sk_buff *skb;
1254         struct ieee80211_mgmt *mgmt;
1255         int err;
1256 
1257         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1258         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1259                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1260         if (!skb)
1261                 return;
1262 
1263         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1264 
1265         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1266         memset(mgmt, 0, 24 + 6);
1267         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1268                                           IEEE80211_STYPE_AUTH);
1269         memcpy(mgmt->da, da, ETH_ALEN);
1270         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1271         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1272         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1273         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1274         mgmt->u.auth.status_code = cpu_to_le16(status);
1275         if (extra)
1276                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1277 
1278         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1279                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1280                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1281                 WARN_ON(err);
1282         }
1283 
1284         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1285                                         tx_flags;
1286         ieee80211_tx_skb(sdata, skb);
1287 }
1288 
1289 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1290                                     const u8 *bssid, u16 stype, u16 reason,
1291                                     bool send_frame, u8 *frame_buf)
1292 {
1293         struct ieee80211_local *local = sdata->local;
1294         struct sk_buff *skb;
1295         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1296 
1297         /* build frame */
1298         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1299         mgmt->duration = 0; /* initialize only */
1300         mgmt->seq_ctrl = 0; /* initialize only */
1301         memcpy(mgmt->da, bssid, ETH_ALEN);
1302         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1303         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1304         /* u.deauth.reason_code == u.disassoc.reason_code */
1305         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1306 
1307         if (send_frame) {
1308                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1309                                     IEEE80211_DEAUTH_FRAME_LEN);
1310                 if (!skb)
1311                         return;
1312 
1313                 skb_reserve(skb, local->hw.extra_tx_headroom);
1314 
1315                 /* copy in frame */
1316                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1317                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1318 
1319                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1320                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1321                         IEEE80211_SKB_CB(skb)->flags |=
1322                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1323 
1324                 ieee80211_tx_skb(sdata, skb);
1325         }
1326 }
1327 
1328 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1329                                          u8 *buffer, size_t buffer_len,
1330                                          const u8 *ie, size_t ie_len,
1331                                          enum ieee80211_band band,
1332                                          u32 rate_mask,
1333                                          struct cfg80211_chan_def *chandef,
1334                                          size_t *offset)
1335 {
1336         struct ieee80211_supported_band *sband;
1337         u8 *pos = buffer, *end = buffer + buffer_len;
1338         size_t noffset;
1339         int supp_rates_len, i;
1340         u8 rates[32];
1341         int num_rates;
1342         int ext_rates_len;
1343         int shift;
1344         u32 rate_flags;
1345         bool have_80mhz = false;
1346 
1347         *offset = 0;
1348 
1349         sband = local->hw.wiphy->bands[band];
1350         if (WARN_ON_ONCE(!sband))
1351                 return 0;
1352 
1353         rate_flags = ieee80211_chandef_rate_flags(chandef);
1354         shift = ieee80211_chandef_get_shift(chandef);
1355 
1356         num_rates = 0;
1357         for (i = 0; i < sband->n_bitrates; i++) {
1358                 if ((BIT(i) & rate_mask) == 0)
1359                         continue; /* skip rate */
1360                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1361                         continue;
1362 
1363                 rates[num_rates++] =
1364                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1365                                           (1 << shift) * 5);
1366         }
1367 
1368         supp_rates_len = min_t(int, num_rates, 8);
1369 
1370         if (end - pos < 2 + supp_rates_len)
1371                 goto out_err;
1372         *pos++ = WLAN_EID_SUPP_RATES;
1373         *pos++ = supp_rates_len;
1374         memcpy(pos, rates, supp_rates_len);
1375         pos += supp_rates_len;
1376 
1377         /* insert "request information" if in custom IEs */
1378         if (ie && ie_len) {
1379                 static const u8 before_extrates[] = {
1380                         WLAN_EID_SSID,
1381                         WLAN_EID_SUPP_RATES,
1382                         WLAN_EID_REQUEST,
1383                 };
1384                 noffset = ieee80211_ie_split(ie, ie_len,
1385                                              before_extrates,
1386                                              ARRAY_SIZE(before_extrates),
1387                                              *offset);
1388                 if (end - pos < noffset - *offset)
1389                         goto out_err;
1390                 memcpy(pos, ie + *offset, noffset - *offset);
1391                 pos += noffset - *offset;
1392                 *offset = noffset;
1393         }
1394 
1395         ext_rates_len = num_rates - supp_rates_len;
1396         if (ext_rates_len > 0) {
1397                 if (end - pos < 2 + ext_rates_len)
1398                         goto out_err;
1399                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1400                 *pos++ = ext_rates_len;
1401                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1402                 pos += ext_rates_len;
1403         }
1404 
1405         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1406                 if (end - pos < 3)
1407                         goto out_err;
1408                 *pos++ = WLAN_EID_DS_PARAMS;
1409                 *pos++ = 1;
1410                 *pos++ = ieee80211_frequency_to_channel(
1411                                 chandef->chan->center_freq);
1412         }
1413 
1414         /* insert custom IEs that go before HT */
1415         if (ie && ie_len) {
1416                 static const u8 before_ht[] = {
1417                         WLAN_EID_SSID,
1418                         WLAN_EID_SUPP_RATES,
1419                         WLAN_EID_REQUEST,
1420                         WLAN_EID_EXT_SUPP_RATES,
1421                         WLAN_EID_DS_PARAMS,
1422                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1423                 };
1424                 noffset = ieee80211_ie_split(ie, ie_len,
1425                                              before_ht, ARRAY_SIZE(before_ht),
1426                                              *offset);
1427                 if (end - pos < noffset - *offset)
1428                         goto out_err;
1429                 memcpy(pos, ie + *offset, noffset - *offset);
1430                 pos += noffset - *offset;
1431                 *offset = noffset;
1432         }
1433 
1434         if (sband->ht_cap.ht_supported) {
1435                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1436                         goto out_err;
1437                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1438                                                 sband->ht_cap.cap);
1439         }
1440 
1441         /*
1442          * If adding more here, adjust code in main.c
1443          * that calculates local->scan_ies_len.
1444          */
1445 
1446         /* insert custom IEs that go before VHT */
1447         if (ie && ie_len) {
1448                 static const u8 before_vht[] = {
1449                         WLAN_EID_SSID,
1450                         WLAN_EID_SUPP_RATES,
1451                         WLAN_EID_REQUEST,
1452                         WLAN_EID_EXT_SUPP_RATES,
1453                         WLAN_EID_DS_PARAMS,
1454                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1455                         WLAN_EID_HT_CAPABILITY,
1456                         WLAN_EID_BSS_COEX_2040,
1457                         WLAN_EID_EXT_CAPABILITY,
1458                         WLAN_EID_SSID_LIST,
1459                         WLAN_EID_CHANNEL_USAGE,
1460                         WLAN_EID_INTERWORKING,
1461                         /* mesh ID can't happen here */
1462                         /* 60 GHz can't happen here right now */
1463                 };
1464                 noffset = ieee80211_ie_split(ie, ie_len,
1465                                              before_vht, ARRAY_SIZE(before_vht),
1466                                              *offset);
1467                 if (end - pos < noffset - *offset)
1468                         goto out_err;
1469                 memcpy(pos, ie + *offset, noffset - *offset);
1470                 pos += noffset - *offset;
1471                 *offset = noffset;
1472         }
1473 
1474         /* Check if any channel in this sband supports at least 80 MHz */
1475         for (i = 0; i < sband->n_channels; i++) {
1476                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1477                                                 IEEE80211_CHAN_NO_80MHZ))
1478                         continue;
1479 
1480                 have_80mhz = true;
1481                 break;
1482         }
1483 
1484         if (sband->vht_cap.vht_supported && have_80mhz) {
1485                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1486                         goto out_err;
1487                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1488                                                  sband->vht_cap.cap);
1489         }
1490 
1491         return pos - buffer;
1492  out_err:
1493         WARN_ONCE(1, "not enough space for preq IEs\n");
1494         return pos - buffer;
1495 }
1496 
1497 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1498                              size_t buffer_len,
1499                              struct ieee80211_scan_ies *ie_desc,
1500                              const u8 *ie, size_t ie_len,
1501                              u8 bands_used, u32 *rate_masks,
1502                              struct cfg80211_chan_def *chandef)
1503 {
1504         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1505         int i;
1506 
1507         memset(ie_desc, 0, sizeof(*ie_desc));
1508 
1509         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1510                 if (bands_used & BIT(i)) {
1511                         pos += ieee80211_build_preq_ies_band(local,
1512                                                              buffer + pos,
1513                                                              buffer_len - pos,
1514                                                              ie, ie_len, i,
1515                                                              rate_masks[i],
1516                                                              chandef,
1517                                                              &custom_ie_offset);
1518                         ie_desc->ies[i] = buffer + old_pos;
1519                         ie_desc->len[i] = pos - old_pos;
1520                         old_pos = pos;
1521                 }
1522         }
1523 
1524         /* add any remaining custom IEs */
1525         if (ie && ie_len) {
1526                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1527                               "not enough space for preq custom IEs\n"))
1528                         return pos;
1529                 memcpy(buffer + pos, ie + custom_ie_offset,
1530                        ie_len - custom_ie_offset);
1531                 ie_desc->common_ies = buffer + pos;
1532                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1533                 pos += ie_len - custom_ie_offset;
1534         }
1535 
1536         return pos;
1537 };
1538 
1539 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1540                                           const u8 *src, const u8 *dst,
1541                                           u32 ratemask,
1542                                           struct ieee80211_channel *chan,
1543                                           const u8 *ssid, size_t ssid_len,
1544                                           const u8 *ie, size_t ie_len,
1545                                           bool directed)
1546 {
1547         struct ieee80211_local *local = sdata->local;
1548         struct cfg80211_chan_def chandef;
1549         struct sk_buff *skb;
1550         struct ieee80211_mgmt *mgmt;
1551         int ies_len;
1552         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1553         struct ieee80211_scan_ies dummy_ie_desc;
1554 
1555         /*
1556          * Do not send DS Channel parameter for directed probe requests
1557          * in order to maximize the chance that we get a response.  Some
1558          * badly-behaved APs don't respond when this parameter is included.
1559          */
1560         chandef.width = sdata->vif.bss_conf.chandef.width;
1561         if (directed)
1562                 chandef.chan = NULL;
1563         else
1564                 chandef.chan = chan;
1565 
1566         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1567                                      100 + ie_len);
1568         if (!skb)
1569                 return NULL;
1570 
1571         rate_masks[chan->band] = ratemask;
1572         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1573                                            skb_tailroom(skb), &dummy_ie_desc,
1574                                            ie, ie_len, BIT(chan->band),
1575                                            rate_masks, &chandef);
1576         skb_put(skb, ies_len);
1577 
1578         if (dst) {
1579                 mgmt = (struct ieee80211_mgmt *) skb->data;
1580                 memcpy(mgmt->da, dst, ETH_ALEN);
1581                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1582         }
1583 
1584         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1585 
1586         return skb;
1587 }
1588 
1589 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1590                               const u8 *src, const u8 *dst,
1591                               const u8 *ssid, size_t ssid_len,
1592                               const u8 *ie, size_t ie_len,
1593                               u32 ratemask, bool directed, u32 tx_flags,
1594                               struct ieee80211_channel *channel, bool scan)
1595 {
1596         struct sk_buff *skb;
1597 
1598         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1599                                         ssid, ssid_len,
1600                                         ie, ie_len, directed);
1601         if (skb) {
1602                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1603                 if (scan)
1604                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1605                 else
1606                         ieee80211_tx_skb(sdata, skb);
1607         }
1608 }
1609 
1610 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1611                             struct ieee802_11_elems *elems,
1612                             enum ieee80211_band band, u32 *basic_rates)
1613 {
1614         struct ieee80211_supported_band *sband;
1615         size_t num_rates;
1616         u32 supp_rates, rate_flags;
1617         int i, j, shift;
1618         sband = sdata->local->hw.wiphy->bands[band];
1619 
1620         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1621         shift = ieee80211_vif_get_shift(&sdata->vif);
1622 
1623         if (WARN_ON(!sband))
1624                 return 1;
1625 
1626         num_rates = sband->n_bitrates;
1627         supp_rates = 0;
1628         for (i = 0; i < elems->supp_rates_len +
1629                      elems->ext_supp_rates_len; i++) {
1630                 u8 rate = 0;
1631                 int own_rate;
1632                 bool is_basic;
1633                 if (i < elems->supp_rates_len)
1634                         rate = elems->supp_rates[i];
1635                 else if (elems->ext_supp_rates)
1636                         rate = elems->ext_supp_rates
1637                                 [i - elems->supp_rates_len];
1638                 own_rate = 5 * (rate & 0x7f);
1639                 is_basic = !!(rate & 0x80);
1640 
1641                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1642                         continue;
1643 
1644                 for (j = 0; j < num_rates; j++) {
1645                         int brate;
1646                         if ((rate_flags & sband->bitrates[j].flags)
1647                             != rate_flags)
1648                                 continue;
1649 
1650                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1651                                              1 << shift);
1652 
1653                         if (brate == own_rate) {
1654                                 supp_rates |= BIT(j);
1655                                 if (basic_rates && is_basic)
1656                                         *basic_rates |= BIT(j);
1657                         }
1658                 }
1659         }
1660         return supp_rates;
1661 }
1662 
1663 void ieee80211_stop_device(struct ieee80211_local *local)
1664 {
1665         ieee80211_led_radio(local, false);
1666         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1667 
1668         cancel_work_sync(&local->reconfig_filter);
1669 
1670         flush_workqueue(local->workqueue);
1671         drv_stop(local);
1672 }
1673 
1674 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1675 {
1676         struct ieee80211_sub_if_data *sdata;
1677         struct ieee80211_chanctx *ctx;
1678 
1679         /*
1680          * We get here if during resume the device can't be restarted properly.
1681          * We might also get here if this happens during HW reset, which is a
1682          * slightly different situation and we need to drop all connections in
1683          * the latter case.
1684          *
1685          * Ask cfg80211 to turn off all interfaces, this will result in more
1686          * warnings but at least we'll then get into a clean stopped state.
1687          */
1688 
1689         local->resuming = false;
1690         local->suspended = false;
1691         local->started = false;
1692 
1693         /* scheduled scan clearly can't be running any more, but tell
1694          * cfg80211 and clear local state
1695          */
1696         ieee80211_sched_scan_end(local);
1697 
1698         list_for_each_entry(sdata, &local->interfaces, list)
1699                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1700 
1701         /* Mark channel contexts as not being in the driver any more to avoid
1702          * removing them from the driver during the shutdown process...
1703          */
1704         mutex_lock(&local->chanctx_mtx);
1705         list_for_each_entry(ctx, &local->chanctx_list, list)
1706                 ctx->driver_present = false;
1707         mutex_unlock(&local->chanctx_mtx);
1708 
1709         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1710 }
1711 
1712 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1713                                      struct ieee80211_sub_if_data *sdata)
1714 {
1715         struct ieee80211_chanctx_conf *conf;
1716         struct ieee80211_chanctx *ctx;
1717 
1718         if (!local->use_chanctx)
1719                 return;
1720 
1721         mutex_lock(&local->chanctx_mtx);
1722         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1723                                          lockdep_is_held(&local->chanctx_mtx));
1724         if (conf) {
1725                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1726                 drv_assign_vif_chanctx(local, sdata, ctx);
1727         }
1728         mutex_unlock(&local->chanctx_mtx);
1729 }
1730 
1731 int ieee80211_reconfig(struct ieee80211_local *local)
1732 {
1733         struct ieee80211_hw *hw = &local->hw;
1734         struct ieee80211_sub_if_data *sdata;
1735         struct ieee80211_chanctx *ctx;
1736         struct sta_info *sta;
1737         int res, i;
1738         bool reconfig_due_to_wowlan = false;
1739         struct ieee80211_sub_if_data *sched_scan_sdata;
1740         struct cfg80211_sched_scan_request *sched_scan_req;
1741         bool sched_scan_stopped = false;
1742 
1743         /* nothing to do if HW shouldn't run */
1744         if (!local->open_count)
1745                 goto wake_up;
1746 
1747 #ifdef CONFIG_PM
1748         if (local->suspended)
1749                 local->resuming = true;
1750 
1751         if (local->wowlan) {
1752                 res = drv_resume(local);
1753                 local->wowlan = false;
1754                 if (res < 0) {
1755                         local->resuming = false;
1756                         return res;
1757                 }
1758                 if (res == 0)
1759                         goto wake_up;
1760                 WARN_ON(res > 1);
1761                 /*
1762                  * res is 1, which means the driver requested
1763                  * to go through a regular reset on wakeup.
1764                  */
1765                 reconfig_due_to_wowlan = true;
1766         }
1767 #endif
1768 
1769         /*
1770          * Upon resume hardware can sometimes be goofy due to
1771          * various platform / driver / bus issues, so restarting
1772          * the device may at times not work immediately. Propagate
1773          * the error.
1774          */
1775         res = drv_start(local);
1776         if (res) {
1777                 if (local->suspended)
1778                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1779                 else
1780                         WARN(1, "Hardware became unavailable during restart.\n");
1781                 ieee80211_handle_reconfig_failure(local);
1782                 return res;
1783         }
1784 
1785         /* setup fragmentation threshold */
1786         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1787 
1788         /* setup RTS threshold */
1789         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1790 
1791         /* reset coverage class */
1792         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1793 
1794         ieee80211_led_radio(local, true);
1795         ieee80211_mod_tpt_led_trig(local,
1796                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1797 
1798         /* add interfaces */
1799         sdata = rtnl_dereference(local->monitor_sdata);
1800         if (sdata) {
1801                 /* in HW restart it exists already */
1802                 WARN_ON(local->resuming);
1803                 res = drv_add_interface(local, sdata);
1804                 if (WARN_ON(res)) {
1805                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1806                         synchronize_net();
1807                         kfree(sdata);
1808                 }
1809         }
1810 
1811         list_for_each_entry(sdata, &local->interfaces, list) {
1812                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1813                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1814                     ieee80211_sdata_running(sdata))
1815                         res = drv_add_interface(local, sdata);
1816         }
1817 
1818         /* add channel contexts */
1819         if (local->use_chanctx) {
1820                 mutex_lock(&local->chanctx_mtx);
1821                 list_for_each_entry(ctx, &local->chanctx_list, list)
1822                         if (ctx->replace_state !=
1823                             IEEE80211_CHANCTX_REPLACES_OTHER)
1824                                 WARN_ON(drv_add_chanctx(local, ctx));
1825                 mutex_unlock(&local->chanctx_mtx);
1826 
1827                 list_for_each_entry(sdata, &local->interfaces, list) {
1828                         if (!ieee80211_sdata_running(sdata))
1829                                 continue;
1830                         ieee80211_assign_chanctx(local, sdata);
1831                 }
1832 
1833                 sdata = rtnl_dereference(local->monitor_sdata);
1834                 if (sdata && ieee80211_sdata_running(sdata))
1835                         ieee80211_assign_chanctx(local, sdata);
1836         }
1837 
1838         /* add STAs back */
1839         mutex_lock(&local->sta_mtx);
1840         list_for_each_entry(sta, &local->sta_list, list) {
1841                 enum ieee80211_sta_state state;
1842 
1843                 if (!sta->uploaded)
1844                         continue;
1845 
1846                 /* AP-mode stations will be added later */
1847                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1848                         continue;
1849 
1850                 for (state = IEEE80211_STA_NOTEXIST;
1851                      state < sta->sta_state; state++)
1852                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1853                                               state + 1));
1854         }
1855         mutex_unlock(&local->sta_mtx);
1856 
1857         /* reconfigure tx conf */
1858         if (hw->queues >= IEEE80211_NUM_ACS) {
1859                 list_for_each_entry(sdata, &local->interfaces, list) {
1860                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1861                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1862                             !ieee80211_sdata_running(sdata))
1863                                 continue;
1864 
1865                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1866                                 drv_conf_tx(local, sdata, i,
1867                                             &sdata->tx_conf[i]);
1868                 }
1869         }
1870 
1871         /* reconfigure hardware */
1872         ieee80211_hw_config(local, ~0);
1873 
1874         ieee80211_configure_filter(local);
1875 
1876         /* Finally also reconfigure all the BSS information */
1877         list_for_each_entry(sdata, &local->interfaces, list) {
1878                 u32 changed;
1879 
1880                 if (!ieee80211_sdata_running(sdata))
1881                         continue;
1882 
1883                 /* common change flags for all interface types */
1884                 changed = BSS_CHANGED_ERP_CTS_PROT |
1885                           BSS_CHANGED_ERP_PREAMBLE |
1886                           BSS_CHANGED_ERP_SLOT |
1887                           BSS_CHANGED_HT |
1888                           BSS_CHANGED_BASIC_RATES |
1889                           BSS_CHANGED_BEACON_INT |
1890                           BSS_CHANGED_BSSID |
1891                           BSS_CHANGED_CQM |
1892                           BSS_CHANGED_QOS |
1893                           BSS_CHANGED_IDLE |
1894                           BSS_CHANGED_TXPOWER;
1895 
1896                 switch (sdata->vif.type) {
1897                 case NL80211_IFTYPE_STATION:
1898                         changed |= BSS_CHANGED_ASSOC |
1899                                    BSS_CHANGED_ARP_FILTER |
1900                                    BSS_CHANGED_PS;
1901 
1902                         /* Re-send beacon info report to the driver */
1903                         if (sdata->u.mgd.have_beacon)
1904                                 changed |= BSS_CHANGED_BEACON_INFO;
1905 
1906                         sdata_lock(sdata);
1907                         ieee80211_bss_info_change_notify(sdata, changed);
1908                         sdata_unlock(sdata);
1909                         break;
1910                 case NL80211_IFTYPE_OCB:
1911                         changed |= BSS_CHANGED_OCB;
1912                         ieee80211_bss_info_change_notify(sdata, changed);
1913                         break;
1914                 case NL80211_IFTYPE_ADHOC:
1915                         changed |= BSS_CHANGED_IBSS;
1916                         /* fall through */
1917                 case NL80211_IFTYPE_AP:
1918                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1919 
1920                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1921                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1922 
1923                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1924                                         drv_start_ap(local, sdata);
1925                         }
1926 
1927                         /* fall through */
1928                 case NL80211_IFTYPE_MESH_POINT:
1929                         if (sdata->vif.bss_conf.enable_beacon) {
1930                                 changed |= BSS_CHANGED_BEACON |
1931                                            BSS_CHANGED_BEACON_ENABLED;
1932                                 ieee80211_bss_info_change_notify(sdata, changed);
1933                         }
1934                         break;
1935                 case NL80211_IFTYPE_WDS:
1936                 case NL80211_IFTYPE_AP_VLAN:
1937                 case NL80211_IFTYPE_MONITOR:
1938                 case NL80211_IFTYPE_P2P_DEVICE:
1939                         /* nothing to do */
1940                         break;
1941                 case NL80211_IFTYPE_UNSPECIFIED:
1942                 case NUM_NL80211_IFTYPES:
1943                 case NL80211_IFTYPE_P2P_CLIENT:
1944                 case NL80211_IFTYPE_P2P_GO:
1945                         WARN_ON(1);
1946                         break;
1947                 }
1948         }
1949 
1950         ieee80211_recalc_ps(local, -1);
1951 
1952         /*
1953          * The sta might be in psm against the ap (e.g. because
1954          * this was the state before a hw restart), so we
1955          * explicitly send a null packet in order to make sure
1956          * it'll sync against the ap (and get out of psm).
1957          */
1958         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1959                 list_for_each_entry(sdata, &local->interfaces, list) {
1960                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1961                                 continue;
1962                         if (!sdata->u.mgd.associated)
1963                                 continue;
1964 
1965                         ieee80211_send_nullfunc(local, sdata, 0);
1966                 }
1967         }
1968 
1969         /* APs are now beaconing, add back stations */
1970         mutex_lock(&local->sta_mtx);
1971         list_for_each_entry(sta, &local->sta_list, list) {
1972                 enum ieee80211_sta_state state;
1973 
1974                 if (!sta->uploaded)
1975                         continue;
1976 
1977                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1978                         continue;
1979 
1980                 for (state = IEEE80211_STA_NOTEXIST;
1981                      state < sta->sta_state; state++)
1982                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1983                                               state + 1));
1984         }
1985         mutex_unlock(&local->sta_mtx);
1986 
1987         /* add back keys */
1988         list_for_each_entry(sdata, &local->interfaces, list)
1989                 if (ieee80211_sdata_running(sdata))
1990                         ieee80211_enable_keys(sdata);
1991 
1992  wake_up:
1993         local->in_reconfig = false;
1994         barrier();
1995 
1996         if (local->monitors == local->open_count && local->monitors > 0)
1997                 ieee80211_add_virtual_monitor(local);
1998 
1999         /*
2000          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2001          * sessions can be established after a resume.
2002          *
2003          * Also tear down aggregation sessions since reconfiguring
2004          * them in a hardware restart scenario is not easily done
2005          * right now, and the hardware will have lost information
2006          * about the sessions, but we and the AP still think they
2007          * are active. This is really a workaround though.
2008          */
2009         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2010                 mutex_lock(&local->sta_mtx);
2011 
2012                 list_for_each_entry(sta, &local->sta_list, list) {
2013                         ieee80211_sta_tear_down_BA_sessions(
2014                                         sta, AGG_STOP_LOCAL_REQUEST);
2015                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2016                 }
2017 
2018                 mutex_unlock(&local->sta_mtx);
2019         }
2020 
2021         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2022                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2023                                         false);
2024 
2025         /*
2026          * Reconfigure sched scan if it was interrupted by FW restart or
2027          * suspend.
2028          */
2029         mutex_lock(&local->mtx);
2030         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2031                                                 lockdep_is_held(&local->mtx));
2032         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2033                                                 lockdep_is_held(&local->mtx));
2034         if (sched_scan_sdata && sched_scan_req)
2035                 /*
2036                  * Sched scan stopped, but we don't want to report it. Instead,
2037                  * we're trying to reschedule.
2038                  */
2039                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2040                                                          sched_scan_req))
2041                         sched_scan_stopped = true;
2042         mutex_unlock(&local->mtx);
2043 
2044         if (sched_scan_stopped)
2045                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2046 
2047         /*
2048          * If this is for hw restart things are still running.
2049          * We may want to change that later, however.
2050          */
2051         if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2052                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2053 
2054         if (!local->suspended)
2055                 return 0;
2056 
2057 #ifdef CONFIG_PM
2058         /* first set suspended false, then resuming */
2059         local->suspended = false;
2060         mb();
2061         local->resuming = false;
2062 
2063         /* It's possible that we don't handle the scan completion in
2064          * time during suspend, so if it's still marked as completed
2065          * here, queue the work and flush it to clean things up.
2066          * Instead of calling the worker function directly here, we
2067          * really queue it to avoid potential races with other flows
2068          * scheduling the same work.
2069          */
2070         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2071                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2072                 flush_delayed_work(&local->scan_work);
2073         }
2074 
2075         if (local->open_count && !reconfig_due_to_wowlan)
2076                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2077 
2078         list_for_each_entry(sdata, &local->interfaces, list) {
2079                 if (!ieee80211_sdata_running(sdata))
2080                         continue;
2081                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2082                         ieee80211_sta_restart(sdata);
2083         }
2084 
2085         mod_timer(&local->sta_cleanup, jiffies + 1);
2086 #else
2087         WARN_ON(1);
2088 #endif
2089 
2090         return 0;
2091 }
2092 
2093 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2094 {
2095         struct ieee80211_sub_if_data *sdata;
2096         struct ieee80211_local *local;
2097         struct ieee80211_key *key;
2098 
2099         if (WARN_ON(!vif))
2100                 return;
2101 
2102         sdata = vif_to_sdata(vif);
2103         local = sdata->local;
2104 
2105         if (WARN_ON(!local->resuming))
2106                 return;
2107 
2108         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2109                 return;
2110 
2111         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2112 
2113         mutex_lock(&local->key_mtx);
2114         list_for_each_entry(key, &sdata->key_list, list)
2115                 key->flags |= KEY_FLAG_TAINTED;
2116         mutex_unlock(&local->key_mtx);
2117 }
2118 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2119 
2120 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2121 {
2122         struct ieee80211_local *local = sdata->local;
2123         struct ieee80211_chanctx_conf *chanctx_conf;
2124         struct ieee80211_chanctx *chanctx;
2125 
2126         mutex_lock(&local->chanctx_mtx);
2127 
2128         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2129                                         lockdep_is_held(&local->chanctx_mtx));
2130 
2131         if (WARN_ON_ONCE(!chanctx_conf))
2132                 goto unlock;
2133 
2134         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2135         ieee80211_recalc_smps_chanctx(local, chanctx);
2136  unlock:
2137         mutex_unlock(&local->chanctx_mtx);
2138 }
2139 
2140 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2141 {
2142         struct ieee80211_local *local = sdata->local;
2143         struct ieee80211_chanctx_conf *chanctx_conf;
2144         struct ieee80211_chanctx *chanctx;
2145 
2146         mutex_lock(&local->chanctx_mtx);
2147 
2148         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2149                                         lockdep_is_held(&local->chanctx_mtx));
2150 
2151         if (WARN_ON_ONCE(!chanctx_conf))
2152                 goto unlock;
2153 
2154         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2155         ieee80211_recalc_chanctx_min_def(local, chanctx);
2156  unlock:
2157         mutex_unlock(&local->chanctx_mtx);
2158 }
2159 
2160 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2161 {
2162         int i;
2163 
2164         for (i = 0; i < n_ids; i++)
2165                 if (ids[i] == id)
2166                         return true;
2167         return false;
2168 }
2169 
2170 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2171                               const u8 *ids, int n_ids,
2172                               const u8 *after_ric, int n_after_ric,
2173                               size_t offset)
2174 {
2175         size_t pos = offset;
2176 
2177         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2178                 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2179                         pos += 2 + ies[pos + 1];
2180 
2181                         while (pos < ielen &&
2182                                !ieee80211_id_in_list(after_ric, n_after_ric,
2183                                                      ies[pos]))
2184                                 pos += 2 + ies[pos + 1];
2185                 } else {
2186                         pos += 2 + ies[pos + 1];
2187                 }
2188         }
2189 
2190         return pos;
2191 }
2192 
2193 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2194                           const u8 *ids, int n_ids, size_t offset)
2195 {
2196         return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2197 }
2198 EXPORT_SYMBOL(ieee80211_ie_split);
2199 
2200 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2201 {
2202         size_t pos = offset;
2203 
2204         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2205                 pos += 2 + ies[pos + 1];
2206 
2207         return pos;
2208 }
2209 
2210 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2211                                             int rssi_min_thold,
2212                                             int rssi_max_thold)
2213 {
2214         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2215 
2216         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2217                 return;
2218 
2219         /*
2220          * Scale up threshold values before storing it, as the RSSI averaging
2221          * algorithm uses a scaled up value as well. Change this scaling
2222          * factor if the RSSI averaging algorithm changes.
2223          */
2224         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2225         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2226 }
2227 
2228 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2229                                     int rssi_min_thold,
2230                                     int rssi_max_thold)
2231 {
2232         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2233 
2234         WARN_ON(rssi_min_thold == rssi_max_thold ||
2235                 rssi_min_thold > rssi_max_thold);
2236 
2237         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2238                                        rssi_max_thold);
2239 }
2240 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2241 
2242 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2243 {
2244         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2245 
2246         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2247 }
2248 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2249 
2250 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2251                               u16 cap)
2252 {
2253         __le16 tmp;
2254 
2255         *pos++ = WLAN_EID_HT_CAPABILITY;
2256         *pos++ = sizeof(struct ieee80211_ht_cap);
2257         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2258 
2259         /* capability flags */
2260         tmp = cpu_to_le16(cap);
2261         memcpy(pos, &tmp, sizeof(u16));
2262         pos += sizeof(u16);
2263 
2264         /* AMPDU parameters */
2265         *pos++ = ht_cap->ampdu_factor |
2266                  (ht_cap->ampdu_density <<
2267                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2268 
2269         /* MCS set */
2270         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2271         pos += sizeof(ht_cap->mcs);
2272 
2273         /* extended capabilities */
2274         pos += sizeof(__le16);
2275 
2276         /* BF capabilities */
2277         pos += sizeof(__le32);
2278 
2279         /* antenna selection */
2280         pos += sizeof(u8);
2281 
2282         return pos;
2283 }
2284 
2285 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2286                                u32 cap)
2287 {
2288         __le32 tmp;
2289 
2290         *pos++ = WLAN_EID_VHT_CAPABILITY;
2291         *pos++ = sizeof(struct ieee80211_vht_cap);
2292         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2293 
2294         /* capability flags */
2295         tmp = cpu_to_le32(cap);
2296         memcpy(pos, &tmp, sizeof(u32));
2297         pos += sizeof(u32);
2298 
2299         /* VHT MCS set */
2300         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2301         pos += sizeof(vht_cap->vht_mcs);
2302 
2303         return pos;
2304 }
2305 
2306 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2307                                const struct cfg80211_chan_def *chandef,
2308                                u16 prot_mode)
2309 {
2310         struct ieee80211_ht_operation *ht_oper;
2311         /* Build HT Information */
2312         *pos++ = WLAN_EID_HT_OPERATION;
2313         *pos++ = sizeof(struct ieee80211_ht_operation);
2314         ht_oper = (struct ieee80211_ht_operation *)pos;
2315         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2316                                         chandef->chan->center_freq);
2317         switch (chandef->width) {
2318         case NL80211_CHAN_WIDTH_160:
2319         case NL80211_CHAN_WIDTH_80P80:
2320         case NL80211_CHAN_WIDTH_80:
2321         case NL80211_CHAN_WIDTH_40:
2322                 if (chandef->center_freq1 > chandef->chan->center_freq)
2323                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2324                 else
2325                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2326                 break;
2327         default:
2328                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2329                 break;
2330         }
2331         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2332             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2333             chandef->width != NL80211_CHAN_WIDTH_20)
2334                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2335 
2336         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2337         ht_oper->stbc_param = 0x0000;
2338 
2339         /* It seems that Basic MCS set and Supported MCS set
2340            are identical for the first 10 bytes */
2341         memset(&ht_oper->basic_set, 0, 16);
2342         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2343 
2344         return pos + sizeof(struct ieee80211_ht_operation);
2345 }
2346 
2347 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2348                                   const struct ieee80211_ht_operation *ht_oper,
2349                                   struct cfg80211_chan_def *chandef)
2350 {
2351         enum nl80211_channel_type channel_type;
2352 
2353         if (!ht_oper) {
2354                 cfg80211_chandef_create(chandef, control_chan,
2355                                         NL80211_CHAN_NO_HT);
2356                 return;
2357         }
2358 
2359         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2360         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2361                 channel_type = NL80211_CHAN_HT20;
2362                 break;
2363         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2364                 channel_type = NL80211_CHAN_HT40PLUS;
2365                 break;
2366         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2367                 channel_type = NL80211_CHAN_HT40MINUS;
2368                 break;
2369         default:
2370                 channel_type = NL80211_CHAN_NO_HT;
2371         }
2372 
2373         cfg80211_chandef_create(chandef, control_chan, channel_type);
2374 }
2375 
2376 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2377                              const struct ieee80211_supported_band *sband,
2378                              const u8 *srates, int srates_len, u32 *rates)
2379 {
2380         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2381         int shift = ieee80211_chandef_get_shift(chandef);
2382         struct ieee80211_rate *br;
2383         int brate, rate, i, j, count = 0;
2384 
2385         *rates = 0;
2386 
2387         for (i = 0; i < srates_len; i++) {
2388                 rate = srates[i] & 0x7f;
2389 
2390                 for (j = 0; j < sband->n_bitrates; j++) {
2391                         br = &sband->bitrates[j];
2392                         if ((rate_flags & br->flags) != rate_flags)
2393                                 continue;
2394 
2395                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2396                         if (brate == rate) {
2397                                 *rates |= BIT(j);
2398                                 count++;
2399                                 break;
2400                         }
2401                 }
2402         }
2403         return count;
2404 }
2405 
2406 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2407                             struct sk_buff *skb, bool need_basic,
2408                             enum ieee80211_band band)
2409 {
2410         struct ieee80211_local *local = sdata->local;
2411         struct ieee80211_supported_band *sband;
2412         int rate, shift;
2413         u8 i, rates, *pos;
2414         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2415         u32 rate_flags;
2416 
2417         shift = ieee80211_vif_get_shift(&sdata->vif);
2418         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2419         sband = local->hw.wiphy->bands[band];
2420         rates = 0;
2421         for (i = 0; i < sband->n_bitrates; i++) {
2422                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2423                         continue;
2424                 rates++;
2425         }
2426         if (rates > 8)
2427                 rates = 8;
2428 
2429         if (skb_tailroom(skb) < rates + 2)
2430                 return -ENOMEM;
2431 
2432         pos = skb_put(skb, rates + 2);
2433         *pos++ = WLAN_EID_SUPP_RATES;
2434         *pos++ = rates;
2435         for (i = 0; i < rates; i++) {
2436                 u8 basic = 0;
2437                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2438                         continue;
2439 
2440                 if (need_basic && basic_rates & BIT(i))
2441                         basic = 0x80;
2442                 rate = sband->bitrates[i].bitrate;
2443                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2444                                     5 * (1 << shift));
2445                 *pos++ = basic | (u8) rate;
2446         }
2447 
2448         return 0;
2449 }
2450 
2451 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2452                                 struct sk_buff *skb, bool need_basic,
2453                                 enum ieee80211_band band)
2454 {
2455         struct ieee80211_local *local = sdata->local;
2456         struct ieee80211_supported_band *sband;
2457         int rate, shift;
2458         u8 i, exrates, *pos;
2459         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2460         u32 rate_flags;
2461 
2462         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2463         shift = ieee80211_vif_get_shift(&sdata->vif);
2464 
2465         sband = local->hw.wiphy->bands[band];
2466         exrates = 0;
2467         for (i = 0; i < sband->n_bitrates; i++) {
2468                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2469                         continue;
2470                 exrates++;
2471         }
2472 
2473         if (exrates > 8)
2474                 exrates -= 8;
2475         else
2476                 exrates = 0;
2477 
2478         if (skb_tailroom(skb) < exrates + 2)
2479                 return -ENOMEM;
2480 
2481         if (exrates) {
2482                 pos = skb_put(skb, exrates + 2);
2483                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2484                 *pos++ = exrates;
2485                 for (i = 8; i < sband->n_bitrates; i++) {
2486                         u8 basic = 0;
2487                         if ((rate_flags & sband->bitrates[i].flags)
2488                             != rate_flags)
2489                                 continue;
2490                         if (need_basic && basic_rates & BIT(i))
2491                                 basic = 0x80;
2492                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2493                                             5 * (1 << shift));
2494                         *pos++ = basic | (u8) rate;
2495                 }
2496         }
2497         return 0;
2498 }
2499 
2500 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2501 {
2502         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2503         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2504 
2505         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2506                 /* non-managed type inferfaces */
2507                 return 0;
2508         }
2509         return ifmgd->ave_beacon_signal / 16;
2510 }
2511 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2512 
2513 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2514 {
2515         if (!mcs)
2516                 return 1;
2517 
2518         /* TODO: consider rx_highest */
2519 
2520         if (mcs->rx_mask[3])
2521                 return 4;
2522         if (mcs->rx_mask[2])
2523                 return 3;
2524         if (mcs->rx_mask[1])
2525                 return 2;
2526         return 1;
2527 }
2528 
2529 /**
2530  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2531  * @local: mac80211 hw info struct
2532  * @status: RX status
2533  * @mpdu_len: total MPDU length (including FCS)
2534  * @mpdu_offset: offset into MPDU to calculate timestamp at
2535  *
2536  * This function calculates the RX timestamp at the given MPDU offset, taking
2537  * into account what the RX timestamp was. An offset of 0 will just normalize
2538  * the timestamp to TSF at beginning of MPDU reception.
2539  */
2540 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2541                                      struct ieee80211_rx_status *status,
2542                                      unsigned int mpdu_len,
2543                                      unsigned int mpdu_offset)
2544 {
2545         u64 ts = status->mactime;
2546         struct rate_info ri;
2547         u16 rate;
2548 
2549         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2550                 return 0;
2551 
2552         memset(&ri, 0, sizeof(ri));
2553 
2554         /* Fill cfg80211 rate info */
2555         if (status->flag & RX_FLAG_HT) {
2556                 ri.mcs = status->rate_idx;
2557                 ri.flags |= RATE_INFO_FLAGS_MCS;
2558                 if (status->flag & RX_FLAG_40MHZ)
2559                         ri.bw = RATE_INFO_BW_40;
2560                 else
2561                         ri.bw = RATE_INFO_BW_20;
2562                 if (status->flag & RX_FLAG_SHORT_GI)
2563                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2564         } else if (status->flag & RX_FLAG_VHT) {
2565                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2566                 ri.mcs = status->rate_idx;
2567                 ri.nss = status->vht_nss;
2568                 if (status->flag & RX_FLAG_40MHZ)
2569                         ri.bw = RATE_INFO_BW_40;
2570                 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2571                         ri.bw = RATE_INFO_BW_80;
2572                 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2573                         ri.bw = RATE_INFO_BW_160;
2574                 else
2575                         ri.bw = RATE_INFO_BW_20;
2576                 if (status->flag & RX_FLAG_SHORT_GI)
2577                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2578         } else {
2579                 struct ieee80211_supported_band *sband;
2580                 int shift = 0;
2581                 int bitrate;
2582 
2583                 if (status->flag & RX_FLAG_10MHZ) {
2584                         shift = 1;
2585                         ri.bw = RATE_INFO_BW_10;
2586                 } else if (status->flag & RX_FLAG_5MHZ) {
2587                         shift = 2;
2588                         ri.bw = RATE_INFO_BW_5;
2589                 } else {
2590                         ri.bw = RATE_INFO_BW_20;
2591                 }
2592 
2593                 sband = local->hw.wiphy->bands[status->band];
2594                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2595                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2596         }
2597 
2598         rate = cfg80211_calculate_bitrate(&ri);
2599         if (WARN_ONCE(!rate,
2600                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2601                       status->flag, status->rate_idx, status->vht_nss))
2602                 return 0;
2603 
2604         /* rewind from end of MPDU */
2605         if (status->flag & RX_FLAG_MACTIME_END)
2606                 ts -= mpdu_len * 8 * 10 / rate;
2607 
2608         ts += mpdu_offset * 8 * 10 / rate;
2609 
2610         return ts;
2611 }
2612 
2613 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2614 {
2615         struct ieee80211_sub_if_data *sdata;
2616         struct cfg80211_chan_def chandef;
2617 
2618         mutex_lock(&local->mtx);
2619         mutex_lock(&local->iflist_mtx);
2620         list_for_each_entry(sdata, &local->interfaces, list) {
2621                 /* it might be waiting for the local->mtx, but then
2622                  * by the time it gets it, sdata->wdev.cac_started
2623                  * will no longer be true
2624                  */
2625                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2626 
2627                 if (sdata->wdev.cac_started) {
2628                         chandef = sdata->vif.bss_conf.chandef;
2629                         ieee80211_vif_release_channel(sdata);
2630                         cfg80211_cac_event(sdata->dev,
2631                                            &chandef,
2632                                            NL80211_RADAR_CAC_ABORTED,
2633                                            GFP_KERNEL);
2634                 }
2635         }
2636         mutex_unlock(&local->iflist_mtx);
2637         mutex_unlock(&local->mtx);
2638 }
2639 
2640 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2641 {
2642         struct ieee80211_local *local =
2643                 container_of(work, struct ieee80211_local, radar_detected_work);
2644         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2645         struct ieee80211_chanctx *ctx;
2646         int num_chanctx = 0;
2647 
2648         mutex_lock(&local->chanctx_mtx);
2649         list_for_each_entry(ctx, &local->chanctx_list, list) {
2650                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2651                         continue;
2652 
2653                 num_chanctx++;
2654                 chandef = ctx->conf.def;
2655         }
2656         mutex_unlock(&local->chanctx_mtx);
2657 
2658         ieee80211_dfs_cac_cancel(local);
2659 
2660         if (num_chanctx > 1)
2661                 /* XXX: multi-channel is not supported yet */
2662                 WARN_ON(1);
2663         else
2664                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2665 }
2666 
2667 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2668 {
2669         struct ieee80211_local *local = hw_to_local(hw);
2670 
2671         trace_api_radar_detected(local);
2672 
2673         ieee80211_queue_work(hw, &local->radar_detected_work);
2674 }
2675 EXPORT_SYMBOL(ieee80211_radar_detected);
2676 
2677 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2678 {
2679         u32 ret;
2680         int tmp;
2681 
2682         switch (c->width) {
2683         case NL80211_CHAN_WIDTH_20:
2684                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2685                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2686                 break;
2687         case NL80211_CHAN_WIDTH_40:
2688                 c->width = NL80211_CHAN_WIDTH_20;
2689                 c->center_freq1 = c->chan->center_freq;
2690                 ret = IEEE80211_STA_DISABLE_40MHZ |
2691                       IEEE80211_STA_DISABLE_VHT;
2692                 break;
2693         case NL80211_CHAN_WIDTH_80:
2694                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2695                 /* n_P40 */
2696                 tmp /= 2;
2697                 /* freq_P40 */
2698                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2699                 c->width = NL80211_CHAN_WIDTH_40;
2700                 ret = IEEE80211_STA_DISABLE_VHT;
2701                 break;
2702         case NL80211_CHAN_WIDTH_80P80:
2703                 c->center_freq2 = 0;
2704                 c->width = NL80211_CHAN_WIDTH_80;
2705                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2706                       IEEE80211_STA_DISABLE_160MHZ;
2707                 break;
2708         case NL80211_CHAN_WIDTH_160:
2709                 /* n_P20 */
2710                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2711                 /* n_P80 */
2712                 tmp /= 4;
2713                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2714                 c->width = NL80211_CHAN_WIDTH_80;
2715                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2716                       IEEE80211_STA_DISABLE_160MHZ;
2717                 break;
2718         default:
2719         case NL80211_CHAN_WIDTH_20_NOHT:
2720                 WARN_ON_ONCE(1);
2721                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2722                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2723                 break;
2724         case NL80211_CHAN_WIDTH_5:
2725         case NL80211_CHAN_WIDTH_10:
2726                 WARN_ON_ONCE(1);
2727                 /* keep c->width */
2728                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2729                 break;
2730         }
2731 
2732         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2733 
2734         return ret;
2735 }
2736 
2737 /*
2738  * Returns true if smps_mode_new is strictly more restrictive than
2739  * smps_mode_old.
2740  */
2741 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2742                                    enum ieee80211_smps_mode smps_mode_new)
2743 {
2744         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2745                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2746                 return false;
2747 
2748         switch (smps_mode_old) {
2749         case IEEE80211_SMPS_STATIC:
2750                 return false;
2751         case IEEE80211_SMPS_DYNAMIC:
2752                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2753         case IEEE80211_SMPS_OFF:
2754                 return smps_mode_new != IEEE80211_SMPS_OFF;
2755         default:
2756                 WARN_ON(1);
2757         }
2758 
2759         return false;
2760 }
2761 
2762 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2763                               struct cfg80211_csa_settings *csa_settings)
2764 {
2765         struct sk_buff *skb;
2766         struct ieee80211_mgmt *mgmt;
2767         struct ieee80211_local *local = sdata->local;
2768         int freq;
2769         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2770                                sizeof(mgmt->u.action.u.chan_switch);
2771         u8 *pos;
2772 
2773         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2774             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2775                 return -EOPNOTSUPP;
2776 
2777         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2778                             5 + /* channel switch announcement element */
2779                             3 + /* secondary channel offset element */
2780                             8); /* mesh channel switch parameters element */
2781         if (!skb)
2782                 return -ENOMEM;
2783 
2784         skb_reserve(skb, local->tx_headroom);
2785         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2786         memset(mgmt, 0, hdr_len);
2787         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2788                                           IEEE80211_STYPE_ACTION);
2789 
2790         eth_broadcast_addr(mgmt->da);
2791         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2792         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2793                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2794         } else {
2795                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2796                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2797         }
2798         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2799         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2800         pos = skb_put(skb, 5);
2801         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2802         *pos++ = 3;                                             /* IE length */
2803         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2804         freq = csa_settings->chandef.chan->center_freq;
2805         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2806         *pos++ = csa_settings->count;                           /* count */
2807 
2808         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2809                 enum nl80211_channel_type ch_type;
2810 
2811                 skb_put(skb, 3);
2812                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2813                 *pos++ = 1;                                     /* IE length */
2814                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2815                 if (ch_type == NL80211_CHAN_HT40PLUS)
2816                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2817                 else
2818                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2819         }
2820 
2821         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2822                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2823 
2824                 skb_put(skb, 8);
2825                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2826                 *pos++ = 6;                                     /* IE length */
2827                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2828                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2829                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2830                 *pos++ |= csa_settings->block_tx ?
2831                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2832                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2833                 pos += 2;
2834                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2835                 pos += 2;
2836         }
2837 
2838         ieee80211_tx_skb(sdata, skb);
2839         return 0;
2840 }
2841 
2842 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2843 {
2844         return !(cs == NULL || cs->cipher == 0 ||
2845                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2846                  cs->hdr_len <= cs->key_idx_off ||
2847                  cs->key_idx_shift > 7 ||
2848                  cs->key_idx_mask == 0);
2849 }
2850 
2851 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2852 {
2853         int i;
2854 
2855         /* Ensure we have enough iftype bitmap space for all iftype values */
2856         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2857 
2858         for (i = 0; i < n; i++)
2859                 if (!ieee80211_cs_valid(&cs[i]))
2860                         return false;
2861 
2862         return true;
2863 }
2864 
2865 const struct ieee80211_cipher_scheme *
2866 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2867                  enum nl80211_iftype iftype)
2868 {
2869         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2870         int n = local->hw.n_cipher_schemes;
2871         int i;
2872         const struct ieee80211_cipher_scheme *cs = NULL;
2873 
2874         for (i = 0; i < n; i++) {
2875                 if (l[i].cipher == cipher) {
2876                         cs = &l[i];
2877                         break;
2878                 }
2879         }
2880 
2881         if (!cs || !(cs->iftype & BIT(iftype)))
2882                 return NULL;
2883 
2884         return cs;
2885 }
2886 
2887 int ieee80211_cs_headroom(struct ieee80211_local *local,
2888                           struct cfg80211_crypto_settings *crypto,
2889                           enum nl80211_iftype iftype)
2890 {
2891         const struct ieee80211_cipher_scheme *cs;
2892         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2893         int i;
2894 
2895         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2896                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2897                                       iftype);
2898 
2899                 if (cs && headroom < cs->hdr_len)
2900                         headroom = cs->hdr_len;
2901         }
2902 
2903         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2904         if (cs && headroom < cs->hdr_len)
2905                 headroom = cs->hdr_len;
2906 
2907         return headroom;
2908 }
2909 
2910 static bool
2911 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2912 {
2913         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2914         int skip;
2915 
2916         if (end > 0)
2917                 return false;
2918 
2919         /* End time is in the past, check for repetitions */
2920         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2921         if (data->count[i] < 255) {
2922                 if (data->count[i] <= skip) {
2923                         data->count[i] = 0;
2924                         return false;
2925                 }
2926 
2927                 data->count[i] -= skip;
2928         }
2929 
2930         data->desc[i].start += skip * data->desc[i].interval;
2931 
2932         return true;
2933 }
2934 
2935 static bool
2936 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2937                              s32 *offset)
2938 {
2939         bool ret = false;
2940         int i;
2941 
2942         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2943                 s32 cur;
2944 
2945                 if (!data->count[i])
2946                         continue;
2947 
2948                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2949                         ret = true;
2950 
2951                 cur = data->desc[i].start - tsf;
2952                 if (cur > *offset)
2953                         continue;
2954 
2955                 cur = data->desc[i].start + data->desc[i].duration - tsf;
2956                 if (cur > *offset)
2957                         *offset = cur;
2958         }
2959 
2960         return ret;
2961 }
2962 
2963 static u32
2964 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2965 {
2966         s32 offset = 0;
2967         int tries = 0;
2968         /*
2969          * arbitrary limit, used to avoid infinite loops when combined NoA
2970          * descriptors cover the full time period.
2971          */
2972         int max_tries = 5;
2973 
2974         ieee80211_extend_absent_time(data, tsf, &offset);
2975         do {
2976                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2977                         break;
2978 
2979                 tries++;
2980         } while (tries < max_tries);
2981 
2982         return offset;
2983 }
2984 
2985 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2986 {
2987         u32 next_offset = BIT(31) - 1;
2988         int i;
2989 
2990         data->absent = 0;
2991         data->has_next_tsf = false;
2992         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2993                 s32 start;
2994 
2995                 if (!data->count[i])
2996                         continue;
2997 
2998                 ieee80211_extend_noa_desc(data, tsf, i);
2999                 start = data->desc[i].start - tsf;
3000                 if (start <= 0)
3001                         data->absent |= BIT(i);
3002 
3003                 if (next_offset > start)
3004                         next_offset = start;
3005 
3006                 data->has_next_tsf = true;
3007         }
3008 
3009         if (data->absent)
3010                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3011 
3012         data->next_tsf = tsf + next_offset;
3013 }
3014 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3015 
3016 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3017                             struct ieee80211_noa_data *data, u32 tsf)
3018 {
3019         int ret = 0;
3020         int i;
3021 
3022         memset(data, 0, sizeof(*data));
3023 
3024         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3025                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3026 
3027                 if (!desc->count || !desc->duration)
3028                         continue;
3029 
3030                 data->count[i] = desc->count;
3031                 data->desc[i].start = le32_to_cpu(desc->start_time);
3032                 data->desc[i].duration = le32_to_cpu(desc->duration);
3033                 data->desc[i].interval = le32_to_cpu(desc->interval);
3034 
3035                 if (data->count[i] > 1 &&
3036                     data->desc[i].interval < data->desc[i].duration)
3037                         continue;
3038 
3039                 ieee80211_extend_noa_desc(data, tsf, i);
3040                 ret++;
3041         }
3042 
3043         if (ret)
3044                 ieee80211_update_p2p_noa(data, tsf);
3045 
3046         return ret;
3047 }
3048 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3049 
3050 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3051                            struct ieee80211_sub_if_data *sdata)
3052 {
3053         u64 tsf = drv_get_tsf(local, sdata);
3054         u64 dtim_count = 0;
3055         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3056         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3057         struct ps_data *ps;
3058         u8 bcns_from_dtim;
3059 
3060         if (tsf == -1ULL || !beacon_int || !dtim_period)
3061                 return;
3062 
3063         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3064             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3065                 if (!sdata->bss)
3066                         return;
3067 
3068                 ps = &sdata->bss->ps;
3069         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3070                 ps = &sdata->u.mesh.ps;
3071         } else {
3072                 return;
3073         }
3074 
3075         /*
3076          * actually finds last dtim_count, mac80211 will update in
3077          * __beacon_add_tim().
3078          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3079          */
3080         do_div(tsf, beacon_int);
3081         bcns_from_dtim = do_div(tsf, dtim_period);
3082         /* just had a DTIM */
3083         if (!bcns_from_dtim)
3084                 dtim_count = 0;
3085         else
3086                 dtim_count = dtim_period - bcns_from_dtim;
3087 
3088         ps->dtim_count = dtim_count;
3089 }
3090 
3091 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3092                                          struct ieee80211_chanctx *ctx)
3093 {
3094         struct ieee80211_sub_if_data *sdata;
3095         u8 radar_detect = 0;
3096 
3097         lockdep_assert_held(&local->chanctx_mtx);
3098 
3099         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3100                 return 0;
3101 
3102         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3103                 if (sdata->reserved_radar_required)
3104                         radar_detect |= BIT(sdata->reserved_chandef.width);
3105 
3106         /*
3107          * An in-place reservation context should not have any assigned vifs
3108          * until it replaces the other context.
3109          */
3110         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3111                 !list_empty(&ctx->assigned_vifs));
3112 
3113         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3114                 if (sdata->radar_required)
3115                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3116 
3117         return radar_detect;
3118 }
3119 
3120 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3121                                  const struct cfg80211_chan_def *chandef,
3122                                  enum ieee80211_chanctx_mode chanmode,
3123                                  u8 radar_detect)
3124 {
3125         struct ieee80211_local *local = sdata->local;
3126         struct ieee80211_sub_if_data *sdata_iter;
3127         enum nl80211_iftype iftype = sdata->wdev.iftype;
3128         int num[NUM_NL80211_IFTYPES];
3129         struct ieee80211_chanctx *ctx;
3130         int num_different_channels = 0;
3131         int total = 1;
3132 
3133         lockdep_assert_held(&local->chanctx_mtx);
3134 
3135         if (WARN_ON(hweight32(radar_detect) > 1))
3136                 return -EINVAL;
3137 
3138         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3139                     !chandef->chan))
3140                 return -EINVAL;
3141 
3142         if (chandef)
3143                 num_different_channels = 1;
3144 
3145         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3146                 return -EINVAL;
3147 
3148         /* Always allow software iftypes */
3149         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3150                 if (radar_detect)
3151                         return -EINVAL;
3152                 return 0;
3153         }
3154 
3155         memset(num, 0, sizeof(num));
3156 
3157         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3158                 num[iftype] = 1;
3159 
3160         list_for_each_entry(ctx, &local->chanctx_list, list) {
3161                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3162                         continue;
3163                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3164                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3165                         num_different_channels++;
3166                         continue;
3167                 }
3168                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3169                     cfg80211_chandef_compatible(chandef,
3170                                                 &ctx->conf.def))
3171                         continue;
3172                 num_different_channels++;
3173         }
3174 
3175         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3176                 struct wireless_dev *wdev_iter;
3177 
3178                 wdev_iter = &sdata_iter->wdev;
3179 
3180                 if (sdata_iter == sdata ||
3181                     !ieee80211_sdata_running(sdata_iter) ||
3182                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3183                         continue;
3184 
3185                 num[wdev_iter->iftype]++;
3186                 total++;
3187         }
3188 
3189         if (total == 1 && !radar_detect)
3190                 return 0;
3191 
3192         return cfg80211_check_combinations(local->hw.wiphy,
3193                                            num_different_channels,
3194                                            radar_detect, num);
3195 }
3196 
3197 static void
3198 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3199                          void *data)
3200 {
3201         u32 *max_num_different_channels = data;
3202 
3203         *max_num_different_channels = max(*max_num_different_channels,
3204                                           c->num_different_channels);
3205 }
3206 
3207 int ieee80211_max_num_channels(struct ieee80211_local *local)
3208 {
3209         struct ieee80211_sub_if_data *sdata;
3210         int num[NUM_NL80211_IFTYPES] = {};
3211         struct ieee80211_chanctx *ctx;
3212         int num_different_channels = 0;
3213         u8 radar_detect = 0;
3214         u32 max_num_different_channels = 1;
3215         int err;
3216 
3217         lockdep_assert_held(&local->chanctx_mtx);
3218 
3219         list_for_each_entry(ctx, &local->chanctx_list, list) {
3220                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3221                         continue;
3222 
3223                 num_different_channels++;
3224 
3225                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3226         }
3227 
3228         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3229                 num[sdata->wdev.iftype]++;
3230 
3231         err = cfg80211_iter_combinations(local->hw.wiphy,
3232                                          num_different_channels, radar_detect,
3233                                          num, ieee80211_iter_max_chans,
3234                                          &max_num_different_channels);
3235         if (err < 0)
3236                 return err;
3237 
3238         return max_num_different_channels;
3239 }
3240 
3241 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3242 {
3243         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3244         *buf++ = 7; /* len */
3245         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3246         *buf++ = 0x50;
3247         *buf++ = 0xf2;
3248         *buf++ = 2; /* WME */
3249         *buf++ = 0; /* WME info */
3250         *buf++ = 1; /* WME ver */
3251         *buf++ = qosinfo; /* U-APSD no in use */
3252 
3253         return buf;
3254 }
3255 

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