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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  * Copyright (C) 2015-2017      Intel Deutschland GmbH
  8  * Copyright (C) 2018 Intel Corporation
  9  *
 10  * This program is free software; you can redistribute it and/or modify
 11  * it under the terms of the GNU General Public License version 2 as
 12  * published by the Free Software Foundation.
 13  *
 14  * utilities for mac80211
 15  */
 16 
 17 #include <net/mac80211.h>
 18 #include <linux/netdevice.h>
 19 #include <linux/export.h>
 20 #include <linux/types.h>
 21 #include <linux/slab.h>
 22 #include <linux/skbuff.h>
 23 #include <linux/etherdevice.h>
 24 #include <linux/if_arp.h>
 25 #include <linux/bitmap.h>
 26 #include <linux/crc32.h>
 27 #include <net/net_namespace.h>
 28 #include <net/cfg80211.h>
 29 #include <net/rtnetlink.h>
 30 
 31 #include "ieee80211_i.h"
 32 #include "driver-ops.h"
 33 #include "rate.h"
 34 #include "mesh.h"
 35 #include "wme.h"
 36 #include "led.h"
 37 #include "wep.h"
 38 
 39 /* privid for wiphys to determine whether they belong to us or not */
 40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
 41 
 42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
 43 {
 44         struct ieee80211_local *local;
 45         BUG_ON(!wiphy);
 46 
 47         local = wiphy_priv(wiphy);
 48         return &local->hw;
 49 }
 50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
 51 
 52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 53 {
 54         struct sk_buff *skb;
 55         struct ieee80211_hdr *hdr;
 56 
 57         skb_queue_walk(&tx->skbs, skb) {
 58                 hdr = (struct ieee80211_hdr *) skb->data;
 59                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 60         }
 61 }
 62 
 63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 64                              int rate, int erp, int short_preamble,
 65                              int shift)
 66 {
 67         int dur;
 68 
 69         /* calculate duration (in microseconds, rounded up to next higher
 70          * integer if it includes a fractional microsecond) to send frame of
 71          * len bytes (does not include FCS) at the given rate. Duration will
 72          * also include SIFS.
 73          *
 74          * rate is in 100 kbps, so divident is multiplied by 10 in the
 75          * DIV_ROUND_UP() operations.
 76          *
 77          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 78          * is assumed to be 0 otherwise.
 79          */
 80 
 81         if (band == NL80211_BAND_5GHZ || erp) {
 82                 /*
 83                  * OFDM:
 84                  *
 85                  * N_DBPS = DATARATE x 4
 86                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 87                  *      (16 = SIGNAL time, 6 = tail bits)
 88                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 89                  *
 90                  * T_SYM = 4 usec
 91                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 92                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 93                  *      signal ext = 6 usec
 94                  */
 95                 dur = 16; /* SIFS + signal ext */
 96                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 97                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 98 
 99                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100                  *  * times 4 for 5 MHz
101                  *  * times 2 for 10 MHz
102                  */
103                 dur *= 1 << shift;
104 
105                 /* rates should already consider the channel bandwidth,
106                  * don't apply divisor again.
107                  */
108                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109                                         4 * rate); /* T_SYM x N_SYM */
110         } else {
111                 /*
112                  * 802.11b or 802.11g with 802.11b compatibility:
113                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115                  *
116                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117                  * aSIFSTime = 10 usec
118                  * aPreambleLength = 144 usec or 72 usec with short preamble
119                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120                  */
121                 dur = 10; /* aSIFSTime = 10 usec */
122                 dur += short_preamble ? (72 + 24) : (144 + 48);
123 
124                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
125         }
126 
127         return dur;
128 }
129 
130 /* Exported duration function for driver use */
131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132                                         struct ieee80211_vif *vif,
133                                         enum nl80211_band band,
134                                         size_t frame_len,
135                                         struct ieee80211_rate *rate)
136 {
137         struct ieee80211_sub_if_data *sdata;
138         u16 dur;
139         int erp, shift = 0;
140         bool short_preamble = false;
141 
142         erp = 0;
143         if (vif) {
144                 sdata = vif_to_sdata(vif);
145                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147                         erp = rate->flags & IEEE80211_RATE_ERP_G;
148                 shift = ieee80211_vif_get_shift(vif);
149         }
150 
151         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152                                        short_preamble, shift);
153 
154         return cpu_to_le16(dur);
155 }
156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157 
158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159                               struct ieee80211_vif *vif, size_t frame_len,
160                               const struct ieee80211_tx_info *frame_txctl)
161 {
162         struct ieee80211_local *local = hw_to_local(hw);
163         struct ieee80211_rate *rate;
164         struct ieee80211_sub_if_data *sdata;
165         bool short_preamble;
166         int erp, shift = 0, bitrate;
167         u16 dur;
168         struct ieee80211_supported_band *sband;
169 
170         sband = local->hw.wiphy->bands[frame_txctl->band];
171 
172         short_preamble = false;
173 
174         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
175 
176         erp = 0;
177         if (vif) {
178                 sdata = vif_to_sdata(vif);
179                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181                         erp = rate->flags & IEEE80211_RATE_ERP_G;
182                 shift = ieee80211_vif_get_shift(vif);
183         }
184 
185         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
186 
187         /* CTS duration */
188         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189                                        erp, short_preamble, shift);
190         /* Data frame duration */
191         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192                                         erp, short_preamble, shift);
193         /* ACK duration */
194         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195                                         erp, short_preamble, shift);
196 
197         return cpu_to_le16(dur);
198 }
199 EXPORT_SYMBOL(ieee80211_rts_duration);
200 
201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202                                     struct ieee80211_vif *vif,
203                                     size_t frame_len,
204                                     const struct ieee80211_tx_info *frame_txctl)
205 {
206         struct ieee80211_local *local = hw_to_local(hw);
207         struct ieee80211_rate *rate;
208         struct ieee80211_sub_if_data *sdata;
209         bool short_preamble;
210         int erp, shift = 0, bitrate;
211         u16 dur;
212         struct ieee80211_supported_band *sband;
213 
214         sband = local->hw.wiphy->bands[frame_txctl->band];
215 
216         short_preamble = false;
217 
218         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
219         erp = 0;
220         if (vif) {
221                 sdata = vif_to_sdata(vif);
222                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224                         erp = rate->flags & IEEE80211_RATE_ERP_G;
225                 shift = ieee80211_vif_get_shift(vif);
226         }
227 
228         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229 
230         /* Data frame duration */
231         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232                                        erp, short_preamble, shift);
233         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234                 /* ACK duration */
235                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236                                                 erp, short_preamble, shift);
237         }
238 
239         return cpu_to_le16(dur);
240 }
241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242 
243 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
244 {
245         struct ieee80211_sub_if_data *sdata;
246         int n_acs = IEEE80211_NUM_ACS;
247 
248         if (local->ops->wake_tx_queue)
249                 return;
250 
251         if (local->hw.queues < IEEE80211_NUM_ACS)
252                 n_acs = 1;
253 
254         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
255                 int ac;
256 
257                 if (!sdata->dev)
258                         continue;
259 
260                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
261                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
262                         continue;
263 
264                 for (ac = 0; ac < n_acs; ac++) {
265                         int ac_queue = sdata->vif.hw_queue[ac];
266 
267                         if (ac_queue == queue ||
268                             (sdata->vif.cab_queue == queue &&
269                              local->queue_stop_reasons[ac_queue] == 0 &&
270                              skb_queue_empty(&local->pending[ac_queue])))
271                                 netif_wake_subqueue(sdata->dev, ac);
272                 }
273         }
274 }
275 
276 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
277                                    enum queue_stop_reason reason,
278                                    bool refcounted)
279 {
280         struct ieee80211_local *local = hw_to_local(hw);
281 
282         trace_wake_queue(local, queue, reason);
283 
284         if (WARN_ON(queue >= hw->queues))
285                 return;
286 
287         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
288                 return;
289 
290         if (!refcounted) {
291                 local->q_stop_reasons[queue][reason] = 0;
292         } else {
293                 local->q_stop_reasons[queue][reason]--;
294                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
295                         local->q_stop_reasons[queue][reason] = 0;
296         }
297 
298         if (local->q_stop_reasons[queue][reason] == 0)
299                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
300 
301         if (local->queue_stop_reasons[queue] != 0)
302                 /* someone still has this queue stopped */
303                 return;
304 
305         if (skb_queue_empty(&local->pending[queue])) {
306                 rcu_read_lock();
307                 ieee80211_propagate_queue_wake(local, queue);
308                 rcu_read_unlock();
309         } else
310                 tasklet_schedule(&local->tx_pending_tasklet);
311 }
312 
313 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
314                                     enum queue_stop_reason reason,
315                                     bool refcounted)
316 {
317         struct ieee80211_local *local = hw_to_local(hw);
318         unsigned long flags;
319 
320         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
321         __ieee80211_wake_queue(hw, queue, reason, refcounted);
322         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
323 }
324 
325 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
326 {
327         ieee80211_wake_queue_by_reason(hw, queue,
328                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
329                                        false);
330 }
331 EXPORT_SYMBOL(ieee80211_wake_queue);
332 
333 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
334                                    enum queue_stop_reason reason,
335                                    bool refcounted)
336 {
337         struct ieee80211_local *local = hw_to_local(hw);
338         struct ieee80211_sub_if_data *sdata;
339         int n_acs = IEEE80211_NUM_ACS;
340 
341         trace_stop_queue(local, queue, reason);
342 
343         if (WARN_ON(queue >= hw->queues))
344                 return;
345 
346         if (!refcounted)
347                 local->q_stop_reasons[queue][reason] = 1;
348         else
349                 local->q_stop_reasons[queue][reason]++;
350 
351         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
352                 return;
353 
354         if (local->ops->wake_tx_queue)
355                 return;
356 
357         if (local->hw.queues < IEEE80211_NUM_ACS)
358                 n_acs = 1;
359 
360         rcu_read_lock();
361         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
362                 int ac;
363 
364                 if (!sdata->dev)
365                         continue;
366 
367                 for (ac = 0; ac < n_acs; ac++) {
368                         if (sdata->vif.hw_queue[ac] == queue ||
369                             sdata->vif.cab_queue == queue)
370                                 netif_stop_subqueue(sdata->dev, ac);
371                 }
372         }
373         rcu_read_unlock();
374 }
375 
376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
377                                     enum queue_stop_reason reason,
378                                     bool refcounted)
379 {
380         struct ieee80211_local *local = hw_to_local(hw);
381         unsigned long flags;
382 
383         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
384         __ieee80211_stop_queue(hw, queue, reason, refcounted);
385         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
386 }
387 
388 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
389 {
390         ieee80211_stop_queue_by_reason(hw, queue,
391                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
392                                        false);
393 }
394 EXPORT_SYMBOL(ieee80211_stop_queue);
395 
396 void ieee80211_add_pending_skb(struct ieee80211_local *local,
397                                struct sk_buff *skb)
398 {
399         struct ieee80211_hw *hw = &local->hw;
400         unsigned long flags;
401         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
402         int queue = info->hw_queue;
403 
404         if (WARN_ON(!info->control.vif)) {
405                 ieee80211_free_txskb(&local->hw, skb);
406                 return;
407         }
408 
409         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
410         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
411                                false);
412         __skb_queue_tail(&local->pending[queue], skb);
413         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
414                                false);
415         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
416 }
417 
418 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
419                                 struct sk_buff_head *skbs)
420 {
421         struct ieee80211_hw *hw = &local->hw;
422         struct sk_buff *skb;
423         unsigned long flags;
424         int queue, i;
425 
426         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
427         while ((skb = skb_dequeue(skbs))) {
428                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
429 
430                 if (WARN_ON(!info->control.vif)) {
431                         ieee80211_free_txskb(&local->hw, skb);
432                         continue;
433                 }
434 
435                 queue = info->hw_queue;
436 
437                 __ieee80211_stop_queue(hw, queue,
438                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
439                                 false);
440 
441                 __skb_queue_tail(&local->pending[queue], skb);
442         }
443 
444         for (i = 0; i < hw->queues; i++)
445                 __ieee80211_wake_queue(hw, i,
446                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
447                         false);
448         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449 }
450 
451 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
452                                      unsigned long queues,
453                                      enum queue_stop_reason reason,
454                                      bool refcounted)
455 {
456         struct ieee80211_local *local = hw_to_local(hw);
457         unsigned long flags;
458         int i;
459 
460         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
461 
462         for_each_set_bit(i, &queues, hw->queues)
463                 __ieee80211_stop_queue(hw, i, reason, refcounted);
464 
465         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
466 }
467 
468 void ieee80211_stop_queues(struct ieee80211_hw *hw)
469 {
470         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
471                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
472                                         false);
473 }
474 EXPORT_SYMBOL(ieee80211_stop_queues);
475 
476 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
477 {
478         struct ieee80211_local *local = hw_to_local(hw);
479         unsigned long flags;
480         int ret;
481 
482         if (WARN_ON(queue >= hw->queues))
483                 return true;
484 
485         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
486         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
487                        &local->queue_stop_reasons[queue]);
488         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489         return ret;
490 }
491 EXPORT_SYMBOL(ieee80211_queue_stopped);
492 
493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494                                      unsigned long queues,
495                                      enum queue_stop_reason reason,
496                                      bool refcounted)
497 {
498         struct ieee80211_local *local = hw_to_local(hw);
499         unsigned long flags;
500         int i;
501 
502         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
503 
504         for_each_set_bit(i, &queues, hw->queues)
505                 __ieee80211_wake_queue(hw, i, reason, refcounted);
506 
507         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
508 }
509 
510 void ieee80211_wake_queues(struct ieee80211_hw *hw)
511 {
512         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
513                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
514                                         false);
515 }
516 EXPORT_SYMBOL(ieee80211_wake_queues);
517 
518 static unsigned int
519 ieee80211_get_vif_queues(struct ieee80211_local *local,
520                          struct ieee80211_sub_if_data *sdata)
521 {
522         unsigned int queues;
523 
524         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
525                 int ac;
526 
527                 queues = 0;
528 
529                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
530                         queues |= BIT(sdata->vif.hw_queue[ac]);
531                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
532                         queues |= BIT(sdata->vif.cab_queue);
533         } else {
534                 /* all queues */
535                 queues = BIT(local->hw.queues) - 1;
536         }
537 
538         return queues;
539 }
540 
541 void __ieee80211_flush_queues(struct ieee80211_local *local,
542                               struct ieee80211_sub_if_data *sdata,
543                               unsigned int queues, bool drop)
544 {
545         if (!local->ops->flush)
546                 return;
547 
548         /*
549          * If no queue was set, or if the HW doesn't support
550          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
551          */
552         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
553                 queues = ieee80211_get_vif_queues(local, sdata);
554 
555         ieee80211_stop_queues_by_reason(&local->hw, queues,
556                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
557                                         false);
558 
559         drv_flush(local, sdata, queues, drop);
560 
561         ieee80211_wake_queues_by_reason(&local->hw, queues,
562                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
563                                         false);
564 }
565 
566 void ieee80211_flush_queues(struct ieee80211_local *local,
567                             struct ieee80211_sub_if_data *sdata, bool drop)
568 {
569         __ieee80211_flush_queues(local, sdata, 0, drop);
570 }
571 
572 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
573                                struct ieee80211_sub_if_data *sdata,
574                                enum queue_stop_reason reason)
575 {
576         ieee80211_stop_queues_by_reason(&local->hw,
577                                         ieee80211_get_vif_queues(local, sdata),
578                                         reason, true);
579 }
580 
581 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
582                                struct ieee80211_sub_if_data *sdata,
583                                enum queue_stop_reason reason)
584 {
585         ieee80211_wake_queues_by_reason(&local->hw,
586                                         ieee80211_get_vif_queues(local, sdata),
587                                         reason, true);
588 }
589 
590 static void __iterate_interfaces(struct ieee80211_local *local,
591                                  u32 iter_flags,
592                                  void (*iterator)(void *data, u8 *mac,
593                                                   struct ieee80211_vif *vif),
594                                  void *data)
595 {
596         struct ieee80211_sub_if_data *sdata;
597         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
598 
599         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
600                 switch (sdata->vif.type) {
601                 case NL80211_IFTYPE_MONITOR:
602                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
603                                 continue;
604                         break;
605                 case NL80211_IFTYPE_AP_VLAN:
606                         continue;
607                 default:
608                         break;
609                 }
610                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
611                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
612                         continue;
613                 if (ieee80211_sdata_running(sdata) || !active_only)
614                         iterator(data, sdata->vif.addr,
615                                  &sdata->vif);
616         }
617 
618         sdata = rcu_dereference_check(local->monitor_sdata,
619                                       lockdep_is_held(&local->iflist_mtx) ||
620                                       lockdep_rtnl_is_held());
621         if (sdata &&
622             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
623              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
624                 iterator(data, sdata->vif.addr, &sdata->vif);
625 }
626 
627 void ieee80211_iterate_interfaces(
628         struct ieee80211_hw *hw, u32 iter_flags,
629         void (*iterator)(void *data, u8 *mac,
630                          struct ieee80211_vif *vif),
631         void *data)
632 {
633         struct ieee80211_local *local = hw_to_local(hw);
634 
635         mutex_lock(&local->iflist_mtx);
636         __iterate_interfaces(local, iter_flags, iterator, data);
637         mutex_unlock(&local->iflist_mtx);
638 }
639 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
640 
641 void ieee80211_iterate_active_interfaces_atomic(
642         struct ieee80211_hw *hw, u32 iter_flags,
643         void (*iterator)(void *data, u8 *mac,
644                          struct ieee80211_vif *vif),
645         void *data)
646 {
647         struct ieee80211_local *local = hw_to_local(hw);
648 
649         rcu_read_lock();
650         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
651                              iterator, data);
652         rcu_read_unlock();
653 }
654 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
655 
656 void ieee80211_iterate_active_interfaces_rtnl(
657         struct ieee80211_hw *hw, u32 iter_flags,
658         void (*iterator)(void *data, u8 *mac,
659                          struct ieee80211_vif *vif),
660         void *data)
661 {
662         struct ieee80211_local *local = hw_to_local(hw);
663 
664         ASSERT_RTNL();
665 
666         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
667                              iterator, data);
668 }
669 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
670 
671 static void __iterate_stations(struct ieee80211_local *local,
672                                void (*iterator)(void *data,
673                                                 struct ieee80211_sta *sta),
674                                void *data)
675 {
676         struct sta_info *sta;
677 
678         list_for_each_entry_rcu(sta, &local->sta_list, list) {
679                 if (!sta->uploaded)
680                         continue;
681 
682                 iterator(data, &sta->sta);
683         }
684 }
685 
686 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
687                         void (*iterator)(void *data,
688                                          struct ieee80211_sta *sta),
689                         void *data)
690 {
691         struct ieee80211_local *local = hw_to_local(hw);
692 
693         rcu_read_lock();
694         __iterate_stations(local, iterator, data);
695         rcu_read_unlock();
696 }
697 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
698 
699 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
700 {
701         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
702 
703         if (!ieee80211_sdata_running(sdata) ||
704             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
705                 return NULL;
706         return &sdata->vif;
707 }
708 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
709 
710 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
711 {
712         struct ieee80211_sub_if_data *sdata;
713 
714         if (!vif)
715                 return NULL;
716 
717         sdata = vif_to_sdata(vif);
718 
719         if (!ieee80211_sdata_running(sdata) ||
720             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
721                 return NULL;
722 
723         return &sdata->wdev;
724 }
725 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
726 
727 /*
728  * Nothing should have been stuffed into the workqueue during
729  * the suspend->resume cycle. Since we can't check each caller
730  * of this function if we are already quiescing / suspended,
731  * check here and don't WARN since this can actually happen when
732  * the rx path (for example) is racing against __ieee80211_suspend
733  * and suspending / quiescing was set after the rx path checked
734  * them.
735  */
736 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
737 {
738         if (local->quiescing || (local->suspended && !local->resuming)) {
739                 pr_warn("queueing ieee80211 work while going to suspend\n");
740                 return false;
741         }
742 
743         return true;
744 }
745 
746 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
747 {
748         struct ieee80211_local *local = hw_to_local(hw);
749 
750         if (!ieee80211_can_queue_work(local))
751                 return;
752 
753         queue_work(local->workqueue, work);
754 }
755 EXPORT_SYMBOL(ieee80211_queue_work);
756 
757 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
758                                   struct delayed_work *dwork,
759                                   unsigned long delay)
760 {
761         struct ieee80211_local *local = hw_to_local(hw);
762 
763         if (!ieee80211_can_queue_work(local))
764                 return;
765 
766         queue_delayed_work(local->workqueue, dwork, delay);
767 }
768 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
769 
770 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
771                                struct ieee802_11_elems *elems,
772                                u64 filter, u32 crc)
773 {
774         size_t left = len;
775         const u8 *pos = start;
776         bool calc_crc = filter != 0;
777         DECLARE_BITMAP(seen_elems, 256);
778         const u8 *ie;
779 
780         bitmap_zero(seen_elems, 256);
781         memset(elems, 0, sizeof(*elems));
782         elems->ie_start = start;
783         elems->total_len = len;
784 
785         while (left >= 2) {
786                 u8 id, elen;
787                 bool elem_parse_failed;
788 
789                 id = *pos++;
790                 elen = *pos++;
791                 left -= 2;
792 
793                 if (elen > left) {
794                         elems->parse_error = true;
795                         break;
796                 }
797 
798                 switch (id) {
799                 case WLAN_EID_SSID:
800                 case WLAN_EID_SUPP_RATES:
801                 case WLAN_EID_FH_PARAMS:
802                 case WLAN_EID_DS_PARAMS:
803                 case WLAN_EID_CF_PARAMS:
804                 case WLAN_EID_TIM:
805                 case WLAN_EID_IBSS_PARAMS:
806                 case WLAN_EID_CHALLENGE:
807                 case WLAN_EID_RSN:
808                 case WLAN_EID_ERP_INFO:
809                 case WLAN_EID_EXT_SUPP_RATES:
810                 case WLAN_EID_HT_CAPABILITY:
811                 case WLAN_EID_HT_OPERATION:
812                 case WLAN_EID_VHT_CAPABILITY:
813                 case WLAN_EID_VHT_OPERATION:
814                 case WLAN_EID_MESH_ID:
815                 case WLAN_EID_MESH_CONFIG:
816                 case WLAN_EID_PEER_MGMT:
817                 case WLAN_EID_PREQ:
818                 case WLAN_EID_PREP:
819                 case WLAN_EID_PERR:
820                 case WLAN_EID_RANN:
821                 case WLAN_EID_CHANNEL_SWITCH:
822                 case WLAN_EID_EXT_CHANSWITCH_ANN:
823                 case WLAN_EID_COUNTRY:
824                 case WLAN_EID_PWR_CONSTRAINT:
825                 case WLAN_EID_TIMEOUT_INTERVAL:
826                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
827                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
828                 case WLAN_EID_CHAN_SWITCH_PARAM:
829                 case WLAN_EID_EXT_CAPABILITY:
830                 case WLAN_EID_CHAN_SWITCH_TIMING:
831                 case WLAN_EID_LINK_ID:
832                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
833                 /*
834                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
835                  * that if the content gets bigger it might be needed more than once
836                  */
837                         if (test_bit(id, seen_elems)) {
838                                 elems->parse_error = true;
839                                 left -= elen;
840                                 pos += elen;
841                                 continue;
842                         }
843                         break;
844                 }
845 
846                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
847                         crc = crc32_be(crc, pos - 2, elen + 2);
848 
849                 elem_parse_failed = false;
850 
851                 switch (id) {
852                 case WLAN_EID_LINK_ID:
853                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
854                                 elem_parse_failed = true;
855                                 break;
856                         }
857                         elems->lnk_id = (void *)(pos - 2);
858                         break;
859                 case WLAN_EID_CHAN_SWITCH_TIMING:
860                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
861                                 elem_parse_failed = true;
862                                 break;
863                         }
864                         elems->ch_sw_timing = (void *)pos;
865                         break;
866                 case WLAN_EID_EXT_CAPABILITY:
867                         elems->ext_capab = pos;
868                         elems->ext_capab_len = elen;
869                         break;
870                 case WLAN_EID_SSID:
871                         elems->ssid = pos;
872                         elems->ssid_len = elen;
873                         break;
874                 case WLAN_EID_SUPP_RATES:
875                         elems->supp_rates = pos;
876                         elems->supp_rates_len = elen;
877                         break;
878                 case WLAN_EID_DS_PARAMS:
879                         if (elen >= 1)
880                                 elems->ds_params = pos;
881                         else
882                                 elem_parse_failed = true;
883                         break;
884                 case WLAN_EID_TIM:
885                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
886                                 elems->tim = (void *)pos;
887                                 elems->tim_len = elen;
888                         } else
889                                 elem_parse_failed = true;
890                         break;
891                 case WLAN_EID_CHALLENGE:
892                         elems->challenge = pos;
893                         elems->challenge_len = elen;
894                         break;
895                 case WLAN_EID_VENDOR_SPECIFIC:
896                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
897                             pos[2] == 0xf2) {
898                                 /* Microsoft OUI (00:50:F2) */
899 
900                                 if (calc_crc)
901                                         crc = crc32_be(crc, pos - 2, elen + 2);
902 
903                                 if (elen >= 5 && pos[3] == 2) {
904                                         /* OUI Type 2 - WMM IE */
905                                         if (pos[4] == 0) {
906                                                 elems->wmm_info = pos;
907                                                 elems->wmm_info_len = elen;
908                                         } else if (pos[4] == 1) {
909                                                 elems->wmm_param = pos;
910                                                 elems->wmm_param_len = elen;
911                                         }
912                                 }
913                         }
914                         break;
915                 case WLAN_EID_RSN:
916                         elems->rsn = pos;
917                         elems->rsn_len = elen;
918                         break;
919                 case WLAN_EID_ERP_INFO:
920                         if (elen >= 1)
921                                 elems->erp_info = pos;
922                         else
923                                 elem_parse_failed = true;
924                         break;
925                 case WLAN_EID_EXT_SUPP_RATES:
926                         elems->ext_supp_rates = pos;
927                         elems->ext_supp_rates_len = elen;
928                         break;
929                 case WLAN_EID_HT_CAPABILITY:
930                         if (elen >= sizeof(struct ieee80211_ht_cap))
931                                 elems->ht_cap_elem = (void *)pos;
932                         else
933                                 elem_parse_failed = true;
934                         break;
935                 case WLAN_EID_HT_OPERATION:
936                         if (elen >= sizeof(struct ieee80211_ht_operation))
937                                 elems->ht_operation = (void *)pos;
938                         else
939                                 elem_parse_failed = true;
940                         break;
941                 case WLAN_EID_VHT_CAPABILITY:
942                         if (elen >= sizeof(struct ieee80211_vht_cap))
943                                 elems->vht_cap_elem = (void *)pos;
944                         else
945                                 elem_parse_failed = true;
946                         break;
947                 case WLAN_EID_VHT_OPERATION:
948                         if (elen >= sizeof(struct ieee80211_vht_operation))
949                                 elems->vht_operation = (void *)pos;
950                         else
951                                 elem_parse_failed = true;
952                         break;
953                 case WLAN_EID_OPMODE_NOTIF:
954                         if (elen > 0)
955                                 elems->opmode_notif = pos;
956                         else
957                                 elem_parse_failed = true;
958                         break;
959                 case WLAN_EID_MESH_ID:
960                         elems->mesh_id = pos;
961                         elems->mesh_id_len = elen;
962                         break;
963                 case WLAN_EID_MESH_CONFIG:
964                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
965                                 elems->mesh_config = (void *)pos;
966                         else
967                                 elem_parse_failed = true;
968                         break;
969                 case WLAN_EID_PEER_MGMT:
970                         elems->peering = pos;
971                         elems->peering_len = elen;
972                         break;
973                 case WLAN_EID_MESH_AWAKE_WINDOW:
974                         if (elen >= 2)
975                                 elems->awake_window = (void *)pos;
976                         break;
977                 case WLAN_EID_PREQ:
978                         elems->preq = pos;
979                         elems->preq_len = elen;
980                         break;
981                 case WLAN_EID_PREP:
982                         elems->prep = pos;
983                         elems->prep_len = elen;
984                         break;
985                 case WLAN_EID_PERR:
986                         elems->perr = pos;
987                         elems->perr_len = elen;
988                         break;
989                 case WLAN_EID_RANN:
990                         if (elen >= sizeof(struct ieee80211_rann_ie))
991                                 elems->rann = (void *)pos;
992                         else
993                                 elem_parse_failed = true;
994                         break;
995                 case WLAN_EID_CHANNEL_SWITCH:
996                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
997                                 elem_parse_failed = true;
998                                 break;
999                         }
1000                         elems->ch_switch_ie = (void *)pos;
1001                         break;
1002                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004                                 elem_parse_failed = true;
1005                                 break;
1006                         }
1007                         elems->ext_chansw_ie = (void *)pos;
1008                         break;
1009                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011                                 elem_parse_failed = true;
1012                                 break;
1013                         }
1014                         elems->sec_chan_offs = (void *)pos;
1015                         break;
1016                 case WLAN_EID_CHAN_SWITCH_PARAM:
1017                         if (elen !=
1018                             sizeof(*elems->mesh_chansw_params_ie)) {
1019                                 elem_parse_failed = true;
1020                                 break;
1021                         }
1022                         elems->mesh_chansw_params_ie = (void *)pos;
1023                         break;
1024                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1025                         if (!action ||
1026                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027                                 elem_parse_failed = true;
1028                                 break;
1029                         }
1030                         elems->wide_bw_chansw_ie = (void *)pos;
1031                         break;
1032                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1033                         if (action) {
1034                                 elem_parse_failed = true;
1035                                 break;
1036                         }
1037                         /*
1038                          * This is a bit tricky, but as we only care about
1039                          * the wide bandwidth channel switch element, so
1040                          * just parse it out manually.
1041                          */
1042                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1043                                               pos, elen);
1044                         if (ie) {
1045                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046                                         elems->wide_bw_chansw_ie =
1047                                                 (void *)(ie + 2);
1048                                 else
1049                                         elem_parse_failed = true;
1050                         }
1051                         break;
1052                 case WLAN_EID_COUNTRY:
1053                         elems->country_elem = pos;
1054                         elems->country_elem_len = elen;
1055                         break;
1056                 case WLAN_EID_PWR_CONSTRAINT:
1057                         if (elen != 1) {
1058                                 elem_parse_failed = true;
1059                                 break;
1060                         }
1061                         elems->pwr_constr_elem = pos;
1062                         break;
1063                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064                         /* Lots of different options exist, but we only care
1065                          * about the Dynamic Transmit Power Control element.
1066                          * First check for the Cisco OUI, then for the DTPC
1067                          * tag (0x00).
1068                          */
1069                         if (elen < 4) {
1070                                 elem_parse_failed = true;
1071                                 break;
1072                         }
1073 
1074                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075                             pos[2] != 0x96 || pos[3] != 0x00)
1076                                 break;
1077 
1078                         if (elen != 6) {
1079                                 elem_parse_failed = true;
1080                                 break;
1081                         }
1082 
1083                         if (calc_crc)
1084                                 crc = crc32_be(crc, pos - 2, elen + 2);
1085 
1086                         elems->cisco_dtpc_elem = pos;
1087                         break;
1088                 case WLAN_EID_TIMEOUT_INTERVAL:
1089                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090                                 elems->timeout_int = (void *)pos;
1091                         else
1092                                 elem_parse_failed = true;
1093                         break;
1094                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1095                         if (elen >= sizeof(*elems->max_idle_period_ie))
1096                                 elems->max_idle_period_ie = (void *)pos;
1097                         break;
1098                 default:
1099                         break;
1100                 }
1101 
1102                 if (elem_parse_failed)
1103                         elems->parse_error = true;
1104                 else
1105                         __set_bit(id, seen_elems);
1106 
1107                 left -= elen;
1108                 pos += elen;
1109         }
1110 
1111         if (left != 0)
1112                 elems->parse_error = true;
1113 
1114         return crc;
1115 }
1116 
1117 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1118                                            struct ieee80211_tx_queue_params
1119                                            *qparam, int ac)
1120 {
1121         struct ieee80211_chanctx_conf *chanctx_conf;
1122         const struct ieee80211_reg_rule *rrule;
1123         struct ieee80211_wmm_ac *wmm_ac;
1124         u16 center_freq = 0;
1125 
1126         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1127             sdata->vif.type != NL80211_IFTYPE_STATION)
1128                 return;
1129 
1130         rcu_read_lock();
1131         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1132         if (chanctx_conf)
1133                 center_freq = chanctx_conf->def.chan->center_freq;
1134 
1135         if (!center_freq) {
1136                 rcu_read_unlock();
1137                 return;
1138         }
1139 
1140         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1141 
1142         if (IS_ERR_OR_NULL(rrule) || !rrule->wmm_rule) {
1143                 rcu_read_unlock();
1144                 return;
1145         }
1146 
1147         if (sdata->vif.type == NL80211_IFTYPE_AP)
1148                 wmm_ac = &rrule->wmm_rule->ap[ac];
1149         else
1150                 wmm_ac = &rrule->wmm_rule->client[ac];
1151         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1152         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1153         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1154         qparam->txop = !qparam->txop ? wmm_ac->cot / 32 :
1155                 min_t(u16, qparam->txop, wmm_ac->cot / 32);
1156         rcu_read_unlock();
1157 }
1158 
1159 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1160                                bool bss_notify, bool enable_qos)
1161 {
1162         struct ieee80211_local *local = sdata->local;
1163         struct ieee80211_tx_queue_params qparam;
1164         struct ieee80211_chanctx_conf *chanctx_conf;
1165         int ac;
1166         bool use_11b;
1167         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1168         int aCWmin, aCWmax;
1169 
1170         if (!local->ops->conf_tx)
1171                 return;
1172 
1173         if (local->hw.queues < IEEE80211_NUM_ACS)
1174                 return;
1175 
1176         memset(&qparam, 0, sizeof(qparam));
1177 
1178         rcu_read_lock();
1179         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1180         use_11b = (chanctx_conf &&
1181                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1182                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1183         rcu_read_unlock();
1184 
1185         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1186 
1187         /* Set defaults according to 802.11-2007 Table 7-37 */
1188         aCWmax = 1023;
1189         if (use_11b)
1190                 aCWmin = 31;
1191         else
1192                 aCWmin = 15;
1193 
1194         /* Confiure old 802.11b/g medium access rules. */
1195         qparam.cw_max = aCWmax;
1196         qparam.cw_min = aCWmin;
1197         qparam.txop = 0;
1198         qparam.aifs = 2;
1199 
1200         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1201                 /* Update if QoS is enabled. */
1202                 if (enable_qos) {
1203                         switch (ac) {
1204                         case IEEE80211_AC_BK:
1205                                 qparam.cw_max = aCWmax;
1206                                 qparam.cw_min = aCWmin;
1207                                 qparam.txop = 0;
1208                                 if (is_ocb)
1209                                         qparam.aifs = 9;
1210                                 else
1211                                         qparam.aifs = 7;
1212                                 break;
1213                         /* never happens but let's not leave undefined */
1214                         default:
1215                         case IEEE80211_AC_BE:
1216                                 qparam.cw_max = aCWmax;
1217                                 qparam.cw_min = aCWmin;
1218                                 qparam.txop = 0;
1219                                 if (is_ocb)
1220                                         qparam.aifs = 6;
1221                                 else
1222                                         qparam.aifs = 3;
1223                                 break;
1224                         case IEEE80211_AC_VI:
1225                                 qparam.cw_max = aCWmin;
1226                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1227                                 if (is_ocb)
1228                                         qparam.txop = 0;
1229                                 else if (use_11b)
1230                                         qparam.txop = 6016/32;
1231                                 else
1232                                         qparam.txop = 3008/32;
1233 
1234                                 if (is_ocb)
1235                                         qparam.aifs = 3;
1236                                 else
1237                                         qparam.aifs = 2;
1238                                 break;
1239                         case IEEE80211_AC_VO:
1240                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1241                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1242                                 if (is_ocb)
1243                                         qparam.txop = 0;
1244                                 else if (use_11b)
1245                                         qparam.txop = 3264/32;
1246                                 else
1247                                         qparam.txop = 1504/32;
1248                                 qparam.aifs = 2;
1249                                 break;
1250                         }
1251                 }
1252                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1253 
1254                 qparam.uapsd = false;
1255 
1256                 sdata->tx_conf[ac] = qparam;
1257                 drv_conf_tx(local, sdata, ac, &qparam);
1258         }
1259 
1260         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1261             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1262             sdata->vif.type != NL80211_IFTYPE_NAN) {
1263                 sdata->vif.bss_conf.qos = enable_qos;
1264                 if (bss_notify)
1265                         ieee80211_bss_info_change_notify(sdata,
1266                                                          BSS_CHANGED_QOS);
1267         }
1268 }
1269 
1270 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1271                          u16 transaction, u16 auth_alg, u16 status,
1272                          const u8 *extra, size_t extra_len, const u8 *da,
1273                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1274                          u32 tx_flags)
1275 {
1276         struct ieee80211_local *local = sdata->local;
1277         struct sk_buff *skb;
1278         struct ieee80211_mgmt *mgmt;
1279         int err;
1280 
1281         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1282         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1283                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1284         if (!skb)
1285                 return;
1286 
1287         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1288 
1289         mgmt = skb_put_zero(skb, 24 + 6);
1290         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1291                                           IEEE80211_STYPE_AUTH);
1292         memcpy(mgmt->da, da, ETH_ALEN);
1293         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1294         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1295         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1296         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1297         mgmt->u.auth.status_code = cpu_to_le16(status);
1298         if (extra)
1299                 skb_put_data(skb, extra, extra_len);
1300 
1301         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1302                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1303                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1304                 WARN_ON(err);
1305         }
1306 
1307         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1308                                         tx_flags;
1309         ieee80211_tx_skb(sdata, skb);
1310 }
1311 
1312 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1313                                     const u8 *bssid, u16 stype, u16 reason,
1314                                     bool send_frame, u8 *frame_buf)
1315 {
1316         struct ieee80211_local *local = sdata->local;
1317         struct sk_buff *skb;
1318         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1319 
1320         /* build frame */
1321         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1322         mgmt->duration = 0; /* initialize only */
1323         mgmt->seq_ctrl = 0; /* initialize only */
1324         memcpy(mgmt->da, bssid, ETH_ALEN);
1325         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1326         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1327         /* u.deauth.reason_code == u.disassoc.reason_code */
1328         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1329 
1330         if (send_frame) {
1331                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1332                                     IEEE80211_DEAUTH_FRAME_LEN);
1333                 if (!skb)
1334                         return;
1335 
1336                 skb_reserve(skb, local->hw.extra_tx_headroom);
1337 
1338                 /* copy in frame */
1339                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1340 
1341                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1342                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1343                         IEEE80211_SKB_CB(skb)->flags |=
1344                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1345 
1346                 ieee80211_tx_skb(sdata, skb);
1347         }
1348 }
1349 
1350 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1351                                          u8 *buffer, size_t buffer_len,
1352                                          const u8 *ie, size_t ie_len,
1353                                          enum nl80211_band band,
1354                                          u32 rate_mask,
1355                                          struct cfg80211_chan_def *chandef,
1356                                          size_t *offset)
1357 {
1358         struct ieee80211_supported_band *sband;
1359         u8 *pos = buffer, *end = buffer + buffer_len;
1360         size_t noffset;
1361         int supp_rates_len, i;
1362         u8 rates[32];
1363         int num_rates;
1364         int ext_rates_len;
1365         int shift;
1366         u32 rate_flags;
1367         bool have_80mhz = false;
1368 
1369         *offset = 0;
1370 
1371         sband = local->hw.wiphy->bands[band];
1372         if (WARN_ON_ONCE(!sband))
1373                 return 0;
1374 
1375         rate_flags = ieee80211_chandef_rate_flags(chandef);
1376         shift = ieee80211_chandef_get_shift(chandef);
1377 
1378         num_rates = 0;
1379         for (i = 0; i < sband->n_bitrates; i++) {
1380                 if ((BIT(i) & rate_mask) == 0)
1381                         continue; /* skip rate */
1382                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1383                         continue;
1384 
1385                 rates[num_rates++] =
1386                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1387                                           (1 << shift) * 5);
1388         }
1389 
1390         supp_rates_len = min_t(int, num_rates, 8);
1391 
1392         if (end - pos < 2 + supp_rates_len)
1393                 goto out_err;
1394         *pos++ = WLAN_EID_SUPP_RATES;
1395         *pos++ = supp_rates_len;
1396         memcpy(pos, rates, supp_rates_len);
1397         pos += supp_rates_len;
1398 
1399         /* insert "request information" if in custom IEs */
1400         if (ie && ie_len) {
1401                 static const u8 before_extrates[] = {
1402                         WLAN_EID_SSID,
1403                         WLAN_EID_SUPP_RATES,
1404                         WLAN_EID_REQUEST,
1405                 };
1406                 noffset = ieee80211_ie_split(ie, ie_len,
1407                                              before_extrates,
1408                                              ARRAY_SIZE(before_extrates),
1409                                              *offset);
1410                 if (end - pos < noffset - *offset)
1411                         goto out_err;
1412                 memcpy(pos, ie + *offset, noffset - *offset);
1413                 pos += noffset - *offset;
1414                 *offset = noffset;
1415         }
1416 
1417         ext_rates_len = num_rates - supp_rates_len;
1418         if (ext_rates_len > 0) {
1419                 if (end - pos < 2 + ext_rates_len)
1420                         goto out_err;
1421                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1422                 *pos++ = ext_rates_len;
1423                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1424                 pos += ext_rates_len;
1425         }
1426 
1427         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1428                 if (end - pos < 3)
1429                         goto out_err;
1430                 *pos++ = WLAN_EID_DS_PARAMS;
1431                 *pos++ = 1;
1432                 *pos++ = ieee80211_frequency_to_channel(
1433                                 chandef->chan->center_freq);
1434         }
1435 
1436         /* insert custom IEs that go before HT */
1437         if (ie && ie_len) {
1438                 static const u8 before_ht[] = {
1439                         /*
1440                          * no need to list the ones split off already
1441                          * (or generated here)
1442                          */
1443                         WLAN_EID_DS_PARAMS,
1444                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1445                 };
1446                 noffset = ieee80211_ie_split(ie, ie_len,
1447                                              before_ht, ARRAY_SIZE(before_ht),
1448                                              *offset);
1449                 if (end - pos < noffset - *offset)
1450                         goto out_err;
1451                 memcpy(pos, ie + *offset, noffset - *offset);
1452                 pos += noffset - *offset;
1453                 *offset = noffset;
1454         }
1455 
1456         if (sband->ht_cap.ht_supported) {
1457                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1458                         goto out_err;
1459                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1460                                                 sband->ht_cap.cap);
1461         }
1462 
1463         /*
1464          * If adding more here, adjust code in main.c
1465          * that calculates local->scan_ies_len.
1466          */
1467 
1468         /* insert custom IEs that go before VHT */
1469         if (ie && ie_len) {
1470                 static const u8 before_vht[] = {
1471                         /*
1472                          * no need to list the ones split off already
1473                          * (or generated here)
1474                          */
1475                         WLAN_EID_BSS_COEX_2040,
1476                         WLAN_EID_EXT_CAPABILITY,
1477                         WLAN_EID_SSID_LIST,
1478                         WLAN_EID_CHANNEL_USAGE,
1479                         WLAN_EID_INTERWORKING,
1480                         WLAN_EID_MESH_ID,
1481                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1482                 };
1483                 noffset = ieee80211_ie_split(ie, ie_len,
1484                                              before_vht, ARRAY_SIZE(before_vht),
1485                                              *offset);
1486                 if (end - pos < noffset - *offset)
1487                         goto out_err;
1488                 memcpy(pos, ie + *offset, noffset - *offset);
1489                 pos += noffset - *offset;
1490                 *offset = noffset;
1491         }
1492 
1493         /* Check if any channel in this sband supports at least 80 MHz */
1494         for (i = 0; i < sband->n_channels; i++) {
1495                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1496                                                 IEEE80211_CHAN_NO_80MHZ))
1497                         continue;
1498 
1499                 have_80mhz = true;
1500                 break;
1501         }
1502 
1503         if (sband->vht_cap.vht_supported && have_80mhz) {
1504                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1505                         goto out_err;
1506                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1507                                                  sband->vht_cap.cap);
1508         }
1509 
1510         return pos - buffer;
1511  out_err:
1512         WARN_ONCE(1, "not enough space for preq IEs\n");
1513         return pos - buffer;
1514 }
1515 
1516 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1517                              size_t buffer_len,
1518                              struct ieee80211_scan_ies *ie_desc,
1519                              const u8 *ie, size_t ie_len,
1520                              u8 bands_used, u32 *rate_masks,
1521                              struct cfg80211_chan_def *chandef)
1522 {
1523         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1524         int i;
1525 
1526         memset(ie_desc, 0, sizeof(*ie_desc));
1527 
1528         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1529                 if (bands_used & BIT(i)) {
1530                         pos += ieee80211_build_preq_ies_band(local,
1531                                                              buffer + pos,
1532                                                              buffer_len - pos,
1533                                                              ie, ie_len, i,
1534                                                              rate_masks[i],
1535                                                              chandef,
1536                                                              &custom_ie_offset);
1537                         ie_desc->ies[i] = buffer + old_pos;
1538                         ie_desc->len[i] = pos - old_pos;
1539                         old_pos = pos;
1540                 }
1541         }
1542 
1543         /* add any remaining custom IEs */
1544         if (ie && ie_len) {
1545                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1546                               "not enough space for preq custom IEs\n"))
1547                         return pos;
1548                 memcpy(buffer + pos, ie + custom_ie_offset,
1549                        ie_len - custom_ie_offset);
1550                 ie_desc->common_ies = buffer + pos;
1551                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1552                 pos += ie_len - custom_ie_offset;
1553         }
1554 
1555         return pos;
1556 };
1557 
1558 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1559                                           const u8 *src, const u8 *dst,
1560                                           u32 ratemask,
1561                                           struct ieee80211_channel *chan,
1562                                           const u8 *ssid, size_t ssid_len,
1563                                           const u8 *ie, size_t ie_len,
1564                                           bool directed)
1565 {
1566         struct ieee80211_local *local = sdata->local;
1567         struct cfg80211_chan_def chandef;
1568         struct sk_buff *skb;
1569         struct ieee80211_mgmt *mgmt;
1570         int ies_len;
1571         u32 rate_masks[NUM_NL80211_BANDS] = {};
1572         struct ieee80211_scan_ies dummy_ie_desc;
1573 
1574         /*
1575          * Do not send DS Channel parameter for directed probe requests
1576          * in order to maximize the chance that we get a response.  Some
1577          * badly-behaved APs don't respond when this parameter is included.
1578          */
1579         chandef.width = sdata->vif.bss_conf.chandef.width;
1580         if (directed)
1581                 chandef.chan = NULL;
1582         else
1583                 chandef.chan = chan;
1584 
1585         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1586                                      100 + ie_len);
1587         if (!skb)
1588                 return NULL;
1589 
1590         rate_masks[chan->band] = ratemask;
1591         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1592                                            skb_tailroom(skb), &dummy_ie_desc,
1593                                            ie, ie_len, BIT(chan->band),
1594                                            rate_masks, &chandef);
1595         skb_put(skb, ies_len);
1596 
1597         if (dst) {
1598                 mgmt = (struct ieee80211_mgmt *) skb->data;
1599                 memcpy(mgmt->da, dst, ETH_ALEN);
1600                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1601         }
1602 
1603         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1604 
1605         return skb;
1606 }
1607 
1608 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1609                               const u8 *src, const u8 *dst,
1610                               const u8 *ssid, size_t ssid_len,
1611                               const u8 *ie, size_t ie_len,
1612                               u32 ratemask, bool directed, u32 tx_flags,
1613                               struct ieee80211_channel *channel, bool scan)
1614 {
1615         struct sk_buff *skb;
1616 
1617         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1618                                         ssid, ssid_len,
1619                                         ie, ie_len, directed);
1620         if (skb) {
1621                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1622                 if (scan)
1623                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1624                 else
1625                         ieee80211_tx_skb(sdata, skb);
1626         }
1627 }
1628 
1629 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1630                             struct ieee802_11_elems *elems,
1631                             enum nl80211_band band, u32 *basic_rates)
1632 {
1633         struct ieee80211_supported_band *sband;
1634         size_t num_rates;
1635         u32 supp_rates, rate_flags;
1636         int i, j, shift;
1637 
1638         sband = sdata->local->hw.wiphy->bands[band];
1639         if (WARN_ON(!sband))
1640                 return 1;
1641 
1642         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1643         shift = ieee80211_vif_get_shift(&sdata->vif);
1644 
1645         num_rates = sband->n_bitrates;
1646         supp_rates = 0;
1647         for (i = 0; i < elems->supp_rates_len +
1648                      elems->ext_supp_rates_len; i++) {
1649                 u8 rate = 0;
1650                 int own_rate;
1651                 bool is_basic;
1652                 if (i < elems->supp_rates_len)
1653                         rate = elems->supp_rates[i];
1654                 else if (elems->ext_supp_rates)
1655                         rate = elems->ext_supp_rates
1656                                 [i - elems->supp_rates_len];
1657                 own_rate = 5 * (rate & 0x7f);
1658                 is_basic = !!(rate & 0x80);
1659 
1660                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1661                         continue;
1662 
1663                 for (j = 0; j < num_rates; j++) {
1664                         int brate;
1665                         if ((rate_flags & sband->bitrates[j].flags)
1666                             != rate_flags)
1667                                 continue;
1668 
1669                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1670                                              1 << shift);
1671 
1672                         if (brate == own_rate) {
1673                                 supp_rates |= BIT(j);
1674                                 if (basic_rates && is_basic)
1675                                         *basic_rates |= BIT(j);
1676                         }
1677                 }
1678         }
1679         return supp_rates;
1680 }
1681 
1682 void ieee80211_stop_device(struct ieee80211_local *local)
1683 {
1684         ieee80211_led_radio(local, false);
1685         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1686 
1687         cancel_work_sync(&local->reconfig_filter);
1688 
1689         flush_workqueue(local->workqueue);
1690         drv_stop(local);
1691 }
1692 
1693 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1694                                            bool aborted)
1695 {
1696         /* It's possible that we don't handle the scan completion in
1697          * time during suspend, so if it's still marked as completed
1698          * here, queue the work and flush it to clean things up.
1699          * Instead of calling the worker function directly here, we
1700          * really queue it to avoid potential races with other flows
1701          * scheduling the same work.
1702          */
1703         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1704                 /* If coming from reconfiguration failure, abort the scan so
1705                  * we don't attempt to continue a partial HW scan - which is
1706                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1707                  * completed scan, and a 5 GHz portion is still pending.
1708                  */
1709                 if (aborted)
1710                         set_bit(SCAN_ABORTED, &local->scanning);
1711                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1712                 flush_delayed_work(&local->scan_work);
1713         }
1714 }
1715 
1716 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1717 {
1718         struct ieee80211_sub_if_data *sdata;
1719         struct ieee80211_chanctx *ctx;
1720 
1721         /*
1722          * We get here if during resume the device can't be restarted properly.
1723          * We might also get here if this happens during HW reset, which is a
1724          * slightly different situation and we need to drop all connections in
1725          * the latter case.
1726          *
1727          * Ask cfg80211 to turn off all interfaces, this will result in more
1728          * warnings but at least we'll then get into a clean stopped state.
1729          */
1730 
1731         local->resuming = false;
1732         local->suspended = false;
1733         local->in_reconfig = false;
1734 
1735         ieee80211_flush_completed_scan(local, true);
1736 
1737         /* scheduled scan clearly can't be running any more, but tell
1738          * cfg80211 and clear local state
1739          */
1740         ieee80211_sched_scan_end(local);
1741 
1742         list_for_each_entry(sdata, &local->interfaces, list)
1743                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1744 
1745         /* Mark channel contexts as not being in the driver any more to avoid
1746          * removing them from the driver during the shutdown process...
1747          */
1748         mutex_lock(&local->chanctx_mtx);
1749         list_for_each_entry(ctx, &local->chanctx_list, list)
1750                 ctx->driver_present = false;
1751         mutex_unlock(&local->chanctx_mtx);
1752 
1753         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1754 }
1755 
1756 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1757                                      struct ieee80211_sub_if_data *sdata)
1758 {
1759         struct ieee80211_chanctx_conf *conf;
1760         struct ieee80211_chanctx *ctx;
1761 
1762         if (!local->use_chanctx)
1763                 return;
1764 
1765         mutex_lock(&local->chanctx_mtx);
1766         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1767                                          lockdep_is_held(&local->chanctx_mtx));
1768         if (conf) {
1769                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1770                 drv_assign_vif_chanctx(local, sdata, ctx);
1771         }
1772         mutex_unlock(&local->chanctx_mtx);
1773 }
1774 
1775 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1776 {
1777         struct ieee80211_local *local = sdata->local;
1778         struct sta_info *sta;
1779 
1780         /* add STAs back */
1781         mutex_lock(&local->sta_mtx);
1782         list_for_each_entry(sta, &local->sta_list, list) {
1783                 enum ieee80211_sta_state state;
1784 
1785                 if (!sta->uploaded || sta->sdata != sdata)
1786                         continue;
1787 
1788                 for (state = IEEE80211_STA_NOTEXIST;
1789                      state < sta->sta_state; state++)
1790                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1791                                               state + 1));
1792         }
1793         mutex_unlock(&local->sta_mtx);
1794 }
1795 
1796 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1797 {
1798         struct cfg80211_nan_func *func, **funcs;
1799         int res, id, i = 0;
1800 
1801         res = drv_start_nan(sdata->local, sdata,
1802                             &sdata->u.nan.conf);
1803         if (WARN_ON(res))
1804                 return res;
1805 
1806         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1807                         sizeof(*funcs),
1808                         GFP_KERNEL);
1809         if (!funcs)
1810                 return -ENOMEM;
1811 
1812         /* Add all the functions:
1813          * This is a little bit ugly. We need to call a potentially sleeping
1814          * callback for each NAN function, so we can't hold the spinlock.
1815          */
1816         spin_lock_bh(&sdata->u.nan.func_lock);
1817 
1818         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1819                 funcs[i++] = func;
1820 
1821         spin_unlock_bh(&sdata->u.nan.func_lock);
1822 
1823         for (i = 0; funcs[i]; i++) {
1824                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1825                 if (WARN_ON(res))
1826                         ieee80211_nan_func_terminated(&sdata->vif,
1827                                                       funcs[i]->instance_id,
1828                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1829                                                       GFP_KERNEL);
1830         }
1831 
1832         kfree(funcs);
1833 
1834         return 0;
1835 }
1836 
1837 int ieee80211_reconfig(struct ieee80211_local *local)
1838 {
1839         struct ieee80211_hw *hw = &local->hw;
1840         struct ieee80211_sub_if_data *sdata;
1841         struct ieee80211_chanctx *ctx;
1842         struct sta_info *sta;
1843         int res, i;
1844         bool reconfig_due_to_wowlan = false;
1845         struct ieee80211_sub_if_data *sched_scan_sdata;
1846         struct cfg80211_sched_scan_request *sched_scan_req;
1847         bool sched_scan_stopped = false;
1848         bool suspended = local->suspended;
1849 
1850         /* nothing to do if HW shouldn't run */
1851         if (!local->open_count)
1852                 goto wake_up;
1853 
1854 #ifdef CONFIG_PM
1855         if (suspended)
1856                 local->resuming = true;
1857 
1858         if (local->wowlan) {
1859                 /*
1860                  * In the wowlan case, both mac80211 and the device
1861                  * are functional when the resume op is called, so
1862                  * clear local->suspended so the device could operate
1863                  * normally (e.g. pass rx frames).
1864                  */
1865                 local->suspended = false;
1866                 res = drv_resume(local);
1867                 local->wowlan = false;
1868                 if (res < 0) {
1869                         local->resuming = false;
1870                         return res;
1871                 }
1872                 if (res == 0)
1873                         goto wake_up;
1874                 WARN_ON(res > 1);
1875                 /*
1876                  * res is 1, which means the driver requested
1877                  * to go through a regular reset on wakeup.
1878                  * restore local->suspended in this case.
1879                  */
1880                 reconfig_due_to_wowlan = true;
1881                 local->suspended = true;
1882         }
1883 #endif
1884 
1885         /*
1886          * In case of hw_restart during suspend (without wowlan),
1887          * cancel restart work, as we are reconfiguring the device
1888          * anyway.
1889          * Note that restart_work is scheduled on a frozen workqueue,
1890          * so we can't deadlock in this case.
1891          */
1892         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1893                 cancel_work_sync(&local->restart_work);
1894 
1895         local->started = false;
1896 
1897         /*
1898          * Upon resume hardware can sometimes be goofy due to
1899          * various platform / driver / bus issues, so restarting
1900          * the device may at times not work immediately. Propagate
1901          * the error.
1902          */
1903         res = drv_start(local);
1904         if (res) {
1905                 if (suspended)
1906                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1907                 else
1908                         WARN(1, "Hardware became unavailable during restart.\n");
1909                 ieee80211_handle_reconfig_failure(local);
1910                 return res;
1911         }
1912 
1913         /* setup fragmentation threshold */
1914         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1915 
1916         /* setup RTS threshold */
1917         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1918 
1919         /* reset coverage class */
1920         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1921 
1922         ieee80211_led_radio(local, true);
1923         ieee80211_mod_tpt_led_trig(local,
1924                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1925 
1926         /* add interfaces */
1927         sdata = rtnl_dereference(local->monitor_sdata);
1928         if (sdata) {
1929                 /* in HW restart it exists already */
1930                 WARN_ON(local->resuming);
1931                 res = drv_add_interface(local, sdata);
1932                 if (WARN_ON(res)) {
1933                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1934                         synchronize_net();
1935                         kfree(sdata);
1936                 }
1937         }
1938 
1939         list_for_each_entry(sdata, &local->interfaces, list) {
1940                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1941                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1942                     ieee80211_sdata_running(sdata)) {
1943                         res = drv_add_interface(local, sdata);
1944                         if (WARN_ON(res))
1945                                 break;
1946                 }
1947         }
1948 
1949         /* If adding any of the interfaces failed above, roll back and
1950          * report failure.
1951          */
1952         if (res) {
1953                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1954                                                      list)
1955                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1956                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1957                             ieee80211_sdata_running(sdata))
1958                                 drv_remove_interface(local, sdata);
1959                 ieee80211_handle_reconfig_failure(local);
1960                 return res;
1961         }
1962 
1963         /* add channel contexts */
1964         if (local->use_chanctx) {
1965                 mutex_lock(&local->chanctx_mtx);
1966                 list_for_each_entry(ctx, &local->chanctx_list, list)
1967                         if (ctx->replace_state !=
1968                             IEEE80211_CHANCTX_REPLACES_OTHER)
1969                                 WARN_ON(drv_add_chanctx(local, ctx));
1970                 mutex_unlock(&local->chanctx_mtx);
1971 
1972                 sdata = rtnl_dereference(local->monitor_sdata);
1973                 if (sdata && ieee80211_sdata_running(sdata))
1974                         ieee80211_assign_chanctx(local, sdata);
1975         }
1976 
1977         /* reconfigure hardware */
1978         ieee80211_hw_config(local, ~0);
1979 
1980         ieee80211_configure_filter(local);
1981 
1982         /* Finally also reconfigure all the BSS information */
1983         list_for_each_entry(sdata, &local->interfaces, list) {
1984                 u32 changed;
1985 
1986                 if (!ieee80211_sdata_running(sdata))
1987                         continue;
1988 
1989                 ieee80211_assign_chanctx(local, sdata);
1990 
1991                 switch (sdata->vif.type) {
1992                 case NL80211_IFTYPE_AP_VLAN:
1993                 case NL80211_IFTYPE_MONITOR:
1994                         break;
1995                 default:
1996                         ieee80211_reconfig_stations(sdata);
1997                         /* fall through */
1998                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1999                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2000                                 drv_conf_tx(local, sdata, i,
2001                                             &sdata->tx_conf[i]);
2002                         break;
2003                 }
2004 
2005                 /* common change flags for all interface types */
2006                 changed = BSS_CHANGED_ERP_CTS_PROT |
2007                           BSS_CHANGED_ERP_PREAMBLE |
2008                           BSS_CHANGED_ERP_SLOT |
2009                           BSS_CHANGED_HT |
2010                           BSS_CHANGED_BASIC_RATES |
2011                           BSS_CHANGED_BEACON_INT |
2012                           BSS_CHANGED_BSSID |
2013                           BSS_CHANGED_CQM |
2014                           BSS_CHANGED_QOS |
2015                           BSS_CHANGED_IDLE |
2016                           BSS_CHANGED_TXPOWER |
2017                           BSS_CHANGED_MCAST_RATE;
2018 
2019                 if (sdata->vif.mu_mimo_owner)
2020                         changed |= BSS_CHANGED_MU_GROUPS;
2021 
2022                 switch (sdata->vif.type) {
2023                 case NL80211_IFTYPE_STATION:
2024                         changed |= BSS_CHANGED_ASSOC |
2025                                    BSS_CHANGED_ARP_FILTER |
2026                                    BSS_CHANGED_PS;
2027 
2028                         /* Re-send beacon info report to the driver */
2029                         if (sdata->u.mgd.have_beacon)
2030                                 changed |= BSS_CHANGED_BEACON_INFO;
2031 
2032                         if (sdata->vif.bss_conf.max_idle_period ||
2033                             sdata->vif.bss_conf.protected_keep_alive)
2034                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2035 
2036                         sdata_lock(sdata);
2037                         ieee80211_bss_info_change_notify(sdata, changed);
2038                         sdata_unlock(sdata);
2039                         break;
2040                 case NL80211_IFTYPE_OCB:
2041                         changed |= BSS_CHANGED_OCB;
2042                         ieee80211_bss_info_change_notify(sdata, changed);
2043                         break;
2044                 case NL80211_IFTYPE_ADHOC:
2045                         changed |= BSS_CHANGED_IBSS;
2046                         /* fall through */
2047                 case NL80211_IFTYPE_AP:
2048                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2049 
2050                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2051                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2052 
2053                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2054                                         drv_start_ap(local, sdata);
2055                         }
2056 
2057                         /* fall through */
2058                 case NL80211_IFTYPE_MESH_POINT:
2059                         if (sdata->vif.bss_conf.enable_beacon) {
2060                                 changed |= BSS_CHANGED_BEACON |
2061                                            BSS_CHANGED_BEACON_ENABLED;
2062                                 ieee80211_bss_info_change_notify(sdata, changed);
2063                         }
2064                         break;
2065                 case NL80211_IFTYPE_NAN:
2066                         res = ieee80211_reconfig_nan(sdata);
2067                         if (res < 0) {
2068                                 ieee80211_handle_reconfig_failure(local);
2069                                 return res;
2070                         }
2071                         break;
2072                 case NL80211_IFTYPE_WDS:
2073                 case NL80211_IFTYPE_AP_VLAN:
2074                 case NL80211_IFTYPE_MONITOR:
2075                 case NL80211_IFTYPE_P2P_DEVICE:
2076                         /* nothing to do */
2077                         break;
2078                 case NL80211_IFTYPE_UNSPECIFIED:
2079                 case NUM_NL80211_IFTYPES:
2080                 case NL80211_IFTYPE_P2P_CLIENT:
2081                 case NL80211_IFTYPE_P2P_GO:
2082                         WARN_ON(1);
2083                         break;
2084                 }
2085         }
2086 
2087         ieee80211_recalc_ps(local);
2088 
2089         /*
2090          * The sta might be in psm against the ap (e.g. because
2091          * this was the state before a hw restart), so we
2092          * explicitly send a null packet in order to make sure
2093          * it'll sync against the ap (and get out of psm).
2094          */
2095         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2096                 list_for_each_entry(sdata, &local->interfaces, list) {
2097                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2098                                 continue;
2099                         if (!sdata->u.mgd.associated)
2100                                 continue;
2101 
2102                         ieee80211_send_nullfunc(local, sdata, false);
2103                 }
2104         }
2105 
2106         /* APs are now beaconing, add back stations */
2107         mutex_lock(&local->sta_mtx);
2108         list_for_each_entry(sta, &local->sta_list, list) {
2109                 enum ieee80211_sta_state state;
2110 
2111                 if (!sta->uploaded)
2112                         continue;
2113 
2114                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2115                         continue;
2116 
2117                 for (state = IEEE80211_STA_NOTEXIST;
2118                      state < sta->sta_state; state++)
2119                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2120                                               state + 1));
2121         }
2122         mutex_unlock(&local->sta_mtx);
2123 
2124         /* add back keys */
2125         list_for_each_entry(sdata, &local->interfaces, list)
2126                 ieee80211_reset_crypto_tx_tailroom(sdata);
2127 
2128         list_for_each_entry(sdata, &local->interfaces, list)
2129                 if (ieee80211_sdata_running(sdata))
2130                         ieee80211_enable_keys(sdata);
2131 
2132         /* Reconfigure sched scan if it was interrupted by FW restart */
2133         mutex_lock(&local->mtx);
2134         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2135                                                 lockdep_is_held(&local->mtx));
2136         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2137                                                 lockdep_is_held(&local->mtx));
2138         if (sched_scan_sdata && sched_scan_req)
2139                 /*
2140                  * Sched scan stopped, but we don't want to report it. Instead,
2141                  * we're trying to reschedule. However, if more than one scan
2142                  * plan was set, we cannot reschedule since we don't know which
2143                  * scan plan was currently running (and some scan plans may have
2144                  * already finished).
2145                  */
2146                 if (sched_scan_req->n_scan_plans > 1 ||
2147                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2148                                                          sched_scan_req)) {
2149                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2150                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2151                         sched_scan_stopped = true;
2152                 }
2153         mutex_unlock(&local->mtx);
2154 
2155         if (sched_scan_stopped)
2156                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2157 
2158  wake_up:
2159 
2160         if (local->monitors == local->open_count && local->monitors > 0)
2161                 ieee80211_add_virtual_monitor(local);
2162 
2163         /*
2164          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2165          * sessions can be established after a resume.
2166          *
2167          * Also tear down aggregation sessions since reconfiguring
2168          * them in a hardware restart scenario is not easily done
2169          * right now, and the hardware will have lost information
2170          * about the sessions, but we and the AP still think they
2171          * are active. This is really a workaround though.
2172          */
2173         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2174                 mutex_lock(&local->sta_mtx);
2175 
2176                 list_for_each_entry(sta, &local->sta_list, list) {
2177                         if (!local->resuming)
2178                                 ieee80211_sta_tear_down_BA_sessions(
2179                                                 sta, AGG_STOP_LOCAL_REQUEST);
2180                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2181                 }
2182 
2183                 mutex_unlock(&local->sta_mtx);
2184         }
2185 
2186         if (local->in_reconfig) {
2187                 local->in_reconfig = false;
2188                 barrier();
2189 
2190                 /* Restart deferred ROCs */
2191                 mutex_lock(&local->mtx);
2192                 ieee80211_start_next_roc(local);
2193                 mutex_unlock(&local->mtx);
2194         }
2195 
2196         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2197                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2198                                         false);
2199 
2200         /*
2201          * If this is for hw restart things are still running.
2202          * We may want to change that later, however.
2203          */
2204         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2205                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2206 
2207         if (!suspended)
2208                 return 0;
2209 
2210 #ifdef CONFIG_PM
2211         /* first set suspended false, then resuming */
2212         local->suspended = false;
2213         mb();
2214         local->resuming = false;
2215 
2216         ieee80211_flush_completed_scan(local, false);
2217 
2218         if (local->open_count && !reconfig_due_to_wowlan)
2219                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2220 
2221         list_for_each_entry(sdata, &local->interfaces, list) {
2222                 if (!ieee80211_sdata_running(sdata))
2223                         continue;
2224                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2225                         ieee80211_sta_restart(sdata);
2226         }
2227 
2228         mod_timer(&local->sta_cleanup, jiffies + 1);
2229 #else
2230         WARN_ON(1);
2231 #endif
2232 
2233         return 0;
2234 }
2235 
2236 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2237 {
2238         struct ieee80211_sub_if_data *sdata;
2239         struct ieee80211_local *local;
2240         struct ieee80211_key *key;
2241 
2242         if (WARN_ON(!vif))
2243                 return;
2244 
2245         sdata = vif_to_sdata(vif);
2246         local = sdata->local;
2247 
2248         if (WARN_ON(!local->resuming))
2249                 return;
2250 
2251         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2252                 return;
2253 
2254         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2255 
2256         mutex_lock(&local->key_mtx);
2257         list_for_each_entry(key, &sdata->key_list, list)
2258                 key->flags |= KEY_FLAG_TAINTED;
2259         mutex_unlock(&local->key_mtx);
2260 }
2261 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2262 
2263 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2264 {
2265         struct ieee80211_local *local = sdata->local;
2266         struct ieee80211_chanctx_conf *chanctx_conf;
2267         struct ieee80211_chanctx *chanctx;
2268 
2269         mutex_lock(&local->chanctx_mtx);
2270 
2271         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2272                                         lockdep_is_held(&local->chanctx_mtx));
2273 
2274         /*
2275          * This function can be called from a work, thus it may be possible
2276          * that the chanctx_conf is removed (due to a disconnection, for
2277          * example).
2278          * So nothing should be done in such case.
2279          */
2280         if (!chanctx_conf)
2281                 goto unlock;
2282 
2283         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2284         ieee80211_recalc_smps_chanctx(local, chanctx);
2285  unlock:
2286         mutex_unlock(&local->chanctx_mtx);
2287 }
2288 
2289 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2290 {
2291         struct ieee80211_local *local = sdata->local;
2292         struct ieee80211_chanctx_conf *chanctx_conf;
2293         struct ieee80211_chanctx *chanctx;
2294 
2295         mutex_lock(&local->chanctx_mtx);
2296 
2297         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2298                                         lockdep_is_held(&local->chanctx_mtx));
2299 
2300         if (WARN_ON_ONCE(!chanctx_conf))
2301                 goto unlock;
2302 
2303         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2304         ieee80211_recalc_chanctx_min_def(local, chanctx);
2305  unlock:
2306         mutex_unlock(&local->chanctx_mtx);
2307 }
2308 
2309 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2310 {
2311         size_t pos = offset;
2312 
2313         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2314                 pos += 2 + ies[pos + 1];
2315 
2316         return pos;
2317 }
2318 
2319 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2320                                             int rssi_min_thold,
2321                                             int rssi_max_thold)
2322 {
2323         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2324 
2325         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2326                 return;
2327 
2328         /*
2329          * Scale up threshold values before storing it, as the RSSI averaging
2330          * algorithm uses a scaled up value as well. Change this scaling
2331          * factor if the RSSI averaging algorithm changes.
2332          */
2333         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2334         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2335 }
2336 
2337 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2338                                     int rssi_min_thold,
2339                                     int rssi_max_thold)
2340 {
2341         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2342 
2343         WARN_ON(rssi_min_thold == rssi_max_thold ||
2344                 rssi_min_thold > rssi_max_thold);
2345 
2346         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2347                                        rssi_max_thold);
2348 }
2349 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2350 
2351 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2352 {
2353         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2354 
2355         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2356 }
2357 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2358 
2359 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2360                               u16 cap)
2361 {
2362         __le16 tmp;
2363 
2364         *pos++ = WLAN_EID_HT_CAPABILITY;
2365         *pos++ = sizeof(struct ieee80211_ht_cap);
2366         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2367 
2368         /* capability flags */
2369         tmp = cpu_to_le16(cap);
2370         memcpy(pos, &tmp, sizeof(u16));
2371         pos += sizeof(u16);
2372 
2373         /* AMPDU parameters */
2374         *pos++ = ht_cap->ampdu_factor |
2375                  (ht_cap->ampdu_density <<
2376                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2377 
2378         /* MCS set */
2379         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2380         pos += sizeof(ht_cap->mcs);
2381 
2382         /* extended capabilities */
2383         pos += sizeof(__le16);
2384 
2385         /* BF capabilities */
2386         pos += sizeof(__le32);
2387 
2388         /* antenna selection */
2389         pos += sizeof(u8);
2390 
2391         return pos;
2392 }
2393 
2394 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2395                                u32 cap)
2396 {
2397         __le32 tmp;
2398 
2399         *pos++ = WLAN_EID_VHT_CAPABILITY;
2400         *pos++ = sizeof(struct ieee80211_vht_cap);
2401         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2402 
2403         /* capability flags */
2404         tmp = cpu_to_le32(cap);
2405         memcpy(pos, &tmp, sizeof(u32));
2406         pos += sizeof(u32);
2407 
2408         /* VHT MCS set */
2409         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2410         pos += sizeof(vht_cap->vht_mcs);
2411 
2412         return pos;
2413 }
2414 
2415 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2416                                const struct cfg80211_chan_def *chandef,
2417                                u16 prot_mode, bool rifs_mode)
2418 {
2419         struct ieee80211_ht_operation *ht_oper;
2420         /* Build HT Information */
2421         *pos++ = WLAN_EID_HT_OPERATION;
2422         *pos++ = sizeof(struct ieee80211_ht_operation);
2423         ht_oper = (struct ieee80211_ht_operation *)pos;
2424         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2425                                         chandef->chan->center_freq);
2426         switch (chandef->width) {
2427         case NL80211_CHAN_WIDTH_160:
2428         case NL80211_CHAN_WIDTH_80P80:
2429         case NL80211_CHAN_WIDTH_80:
2430         case NL80211_CHAN_WIDTH_40:
2431                 if (chandef->center_freq1 > chandef->chan->center_freq)
2432                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2433                 else
2434                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2435                 break;
2436         default:
2437                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2438                 break;
2439         }
2440         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2441             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2442             chandef->width != NL80211_CHAN_WIDTH_20)
2443                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2444 
2445         if (rifs_mode)
2446                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2447 
2448         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2449         ht_oper->stbc_param = 0x0000;
2450 
2451         /* It seems that Basic MCS set and Supported MCS set
2452            are identical for the first 10 bytes */
2453         memset(&ht_oper->basic_set, 0, 16);
2454         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2455 
2456         return pos + sizeof(struct ieee80211_ht_operation);
2457 }
2458 
2459 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2460                                    const struct cfg80211_chan_def *chandef)
2461 {
2462         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2463         *pos++ = 3;                                     /* IE length */
2464         /* New channel width */
2465         switch (chandef->width) {
2466         case NL80211_CHAN_WIDTH_80:
2467                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2468                 break;
2469         case NL80211_CHAN_WIDTH_160:
2470                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2471                 break;
2472         case NL80211_CHAN_WIDTH_80P80:
2473                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2474                 break;
2475         default:
2476                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2477         }
2478 
2479         /* new center frequency segment 0 */
2480         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2481         /* new center frequency segment 1 */
2482         if (chandef->center_freq2)
2483                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2484         else
2485                 *pos++ = 0;
2486 }
2487 
2488 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2489                                 const struct cfg80211_chan_def *chandef)
2490 {
2491         struct ieee80211_vht_operation *vht_oper;
2492 
2493         *pos++ = WLAN_EID_VHT_OPERATION;
2494         *pos++ = sizeof(struct ieee80211_vht_operation);
2495         vht_oper = (struct ieee80211_vht_operation *)pos;
2496         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2497                                                         chandef->center_freq1);
2498         if (chandef->center_freq2)
2499                 vht_oper->center_freq_seg1_idx =
2500                         ieee80211_frequency_to_channel(chandef->center_freq2);
2501         else
2502                 vht_oper->center_freq_seg1_idx = 0x00;
2503 
2504         switch (chandef->width) {
2505         case NL80211_CHAN_WIDTH_160:
2506                 /*
2507                  * Convert 160 MHz channel width to new style as interop
2508                  * workaround.
2509                  */
2510                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2511                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2512                 if (chandef->chan->center_freq < chandef->center_freq1)
2513                         vht_oper->center_freq_seg0_idx -= 8;
2514                 else
2515                         vht_oper->center_freq_seg0_idx += 8;
2516                 break;
2517         case NL80211_CHAN_WIDTH_80P80:
2518                 /*
2519                  * Convert 80+80 MHz channel width to new style as interop
2520                  * workaround.
2521                  */
2522                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2523                 break;
2524         case NL80211_CHAN_WIDTH_80:
2525                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2526                 break;
2527         default:
2528                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2529                 break;
2530         }
2531 
2532         /* don't require special VHT peer rates */
2533         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2534 
2535         return pos + sizeof(struct ieee80211_vht_operation);
2536 }
2537 
2538 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2539                                struct cfg80211_chan_def *chandef)
2540 {
2541         enum nl80211_channel_type channel_type;
2542 
2543         if (!ht_oper)
2544                 return false;
2545 
2546         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2547         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2548                 channel_type = NL80211_CHAN_HT20;
2549                 break;
2550         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2551                 channel_type = NL80211_CHAN_HT40PLUS;
2552                 break;
2553         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2554                 channel_type = NL80211_CHAN_HT40MINUS;
2555                 break;
2556         default:
2557                 channel_type = NL80211_CHAN_NO_HT;
2558                 return false;
2559         }
2560 
2561         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2562         return true;
2563 }
2564 
2565 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2566                                 struct cfg80211_chan_def *chandef)
2567 {
2568         struct cfg80211_chan_def new = *chandef;
2569         int cf1, cf2;
2570 
2571         if (!oper)
2572                 return false;
2573 
2574         cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2575                                              chandef->chan->band);
2576         cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2577                                              chandef->chan->band);
2578 
2579         switch (oper->chan_width) {
2580         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2581                 break;
2582         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2583                 new.width = NL80211_CHAN_WIDTH_80;
2584                 new.center_freq1 = cf1;
2585                 /* If needed, adjust based on the newer interop workaround. */
2586                 if (oper->center_freq_seg1_idx) {
2587                         unsigned int diff;
2588 
2589                         diff = abs(oper->center_freq_seg1_idx -
2590                                    oper->center_freq_seg0_idx);
2591                         if (diff == 8) {
2592                                 new.width = NL80211_CHAN_WIDTH_160;
2593                                 new.center_freq1 = cf2;
2594                         } else if (diff > 8) {
2595                                 new.width = NL80211_CHAN_WIDTH_80P80;
2596                                 new.center_freq2 = cf2;
2597                         }
2598                 }
2599                 break;
2600         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2601                 new.width = NL80211_CHAN_WIDTH_160;
2602                 new.center_freq1 = cf1;
2603                 break;
2604         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2605                 new.width = NL80211_CHAN_WIDTH_80P80;
2606                 new.center_freq1 = cf1;
2607                 new.center_freq2 = cf2;
2608                 break;
2609         default:
2610                 return false;
2611         }
2612 
2613         if (!cfg80211_chandef_valid(&new))
2614                 return false;
2615 
2616         *chandef = new;
2617         return true;
2618 }
2619 
2620 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2621                              const struct ieee80211_supported_band *sband,
2622                              const u8 *srates, int srates_len, u32 *rates)
2623 {
2624         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2625         int shift = ieee80211_chandef_get_shift(chandef);
2626         struct ieee80211_rate *br;
2627         int brate, rate, i, j, count = 0;
2628 
2629         *rates = 0;
2630 
2631         for (i = 0; i < srates_len; i++) {
2632                 rate = srates[i] & 0x7f;
2633 
2634                 for (j = 0; j < sband->n_bitrates; j++) {
2635                         br = &sband->bitrates[j];
2636                         if ((rate_flags & br->flags) != rate_flags)
2637                                 continue;
2638 
2639                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2640                         if (brate == rate) {
2641                                 *rates |= BIT(j);
2642                                 count++;
2643                                 break;
2644                         }
2645                 }
2646         }
2647         return count;
2648 }
2649 
2650 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2651                             struct sk_buff *skb, bool need_basic,
2652                             enum nl80211_band band)
2653 {
2654         struct ieee80211_local *local = sdata->local;
2655         struct ieee80211_supported_band *sband;
2656         int rate, shift;
2657         u8 i, rates, *pos;
2658         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2659         u32 rate_flags;
2660 
2661         shift = ieee80211_vif_get_shift(&sdata->vif);
2662         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2663         sband = local->hw.wiphy->bands[band];
2664         rates = 0;
2665         for (i = 0; i < sband->n_bitrates; i++) {
2666                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2667                         continue;
2668                 rates++;
2669         }
2670         if (rates > 8)
2671                 rates = 8;
2672 
2673         if (skb_tailroom(skb) < rates + 2)
2674                 return -ENOMEM;
2675 
2676         pos = skb_put(skb, rates + 2);
2677         *pos++ = WLAN_EID_SUPP_RATES;
2678         *pos++ = rates;
2679         for (i = 0; i < rates; i++) {
2680                 u8 basic = 0;
2681                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2682                         continue;
2683 
2684                 if (need_basic && basic_rates & BIT(i))
2685                         basic = 0x80;
2686                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2687                                     5 * (1 << shift));
2688                 *pos++ = basic | (u8) rate;
2689         }
2690 
2691         return 0;
2692 }
2693 
2694 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2695                                 struct sk_buff *skb, bool need_basic,
2696                                 enum nl80211_band band)
2697 {
2698         struct ieee80211_local *local = sdata->local;
2699         struct ieee80211_supported_band *sband;
2700         int rate, shift;
2701         u8 i, exrates, *pos;
2702         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2703         u32 rate_flags;
2704 
2705         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2706         shift = ieee80211_vif_get_shift(&sdata->vif);
2707 
2708         sband = local->hw.wiphy->bands[band];
2709         exrates = 0;
2710         for (i = 0; i < sband->n_bitrates; i++) {
2711                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2712                         continue;
2713                 exrates++;
2714         }
2715 
2716         if (exrates > 8)
2717                 exrates -= 8;
2718         else
2719                 exrates = 0;
2720 
2721         if (skb_tailroom(skb) < exrates + 2)
2722                 return -ENOMEM;
2723 
2724         if (exrates) {
2725                 pos = skb_put(skb, exrates + 2);
2726                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2727                 *pos++ = exrates;
2728                 for (i = 8; i < sband->n_bitrates; i++) {
2729                         u8 basic = 0;
2730                         if ((rate_flags & sband->bitrates[i].flags)
2731                             != rate_flags)
2732                                 continue;
2733                         if (need_basic && basic_rates & BIT(i))
2734                                 basic = 0x80;
2735                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2736                                             5 * (1 << shift));
2737                         *pos++ = basic | (u8) rate;
2738                 }
2739         }
2740         return 0;
2741 }
2742 
2743 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2744 {
2745         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2746         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2747 
2748         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2749                 /* non-managed type inferfaces */
2750                 return 0;
2751         }
2752         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2753 }
2754 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2755 
2756 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2757 {
2758         if (!mcs)
2759                 return 1;
2760 
2761         /* TODO: consider rx_highest */
2762 
2763         if (mcs->rx_mask[3])
2764                 return 4;
2765         if (mcs->rx_mask[2])
2766                 return 3;
2767         if (mcs->rx_mask[1])
2768                 return 2;
2769         return 1;
2770 }
2771 
2772 /**
2773  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2774  * @local: mac80211 hw info struct
2775  * @status: RX status
2776  * @mpdu_len: total MPDU length (including FCS)
2777  * @mpdu_offset: offset into MPDU to calculate timestamp at
2778  *
2779  * This function calculates the RX timestamp at the given MPDU offset, taking
2780  * into account what the RX timestamp was. An offset of 0 will just normalize
2781  * the timestamp to TSF at beginning of MPDU reception.
2782  */
2783 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2784                                      struct ieee80211_rx_status *status,
2785                                      unsigned int mpdu_len,
2786                                      unsigned int mpdu_offset)
2787 {
2788         u64 ts = status->mactime;
2789         struct rate_info ri;
2790         u16 rate;
2791 
2792         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2793                 return 0;
2794 
2795         memset(&ri, 0, sizeof(ri));
2796 
2797         ri.bw = status->bw;
2798 
2799         /* Fill cfg80211 rate info */
2800         switch (status->encoding) {
2801         case RX_ENC_HT:
2802                 ri.mcs = status->rate_idx;
2803                 ri.flags |= RATE_INFO_FLAGS_MCS;
2804                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2805                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2806                 break;
2807         case RX_ENC_VHT:
2808                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2809                 ri.mcs = status->rate_idx;
2810                 ri.nss = status->nss;
2811                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2812                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2813                 break;
2814         default:
2815                 WARN_ON(1);
2816                 /* fall through */
2817         case RX_ENC_LEGACY: {
2818                 struct ieee80211_supported_band *sband;
2819                 int shift = 0;
2820                 int bitrate;
2821 
2822                 switch (status->bw) {
2823                 case RATE_INFO_BW_10:
2824                         shift = 1;
2825                         break;
2826                 case RATE_INFO_BW_5:
2827                         shift = 2;
2828                         break;
2829                 }
2830 
2831                 sband = local->hw.wiphy->bands[status->band];
2832                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2833                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2834 
2835                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2836                         /* TODO: handle HT/VHT preambles */
2837                         if (status->band == NL80211_BAND_5GHZ) {
2838                                 ts += 20 << shift;
2839                                 mpdu_offset += 2;
2840                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2841                                 ts += 96;
2842                         } else {
2843                                 ts += 192;
2844                         }
2845                 }
2846                 break;
2847                 }
2848         }
2849 
2850         rate = cfg80211_calculate_bitrate(&ri);
2851         if (WARN_ONCE(!rate,
2852                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2853                       (unsigned long long)status->flag, status->rate_idx,
2854                       status->nss))
2855                 return 0;
2856 
2857         /* rewind from end of MPDU */
2858         if (status->flag & RX_FLAG_MACTIME_END)
2859                 ts -= mpdu_len * 8 * 10 / rate;
2860 
2861         ts += mpdu_offset * 8 * 10 / rate;
2862 
2863         return ts;
2864 }
2865 
2866 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2867 {
2868         struct ieee80211_sub_if_data *sdata;
2869         struct cfg80211_chan_def chandef;
2870 
2871         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2872         ASSERT_RTNL();
2873 
2874         mutex_lock(&local->mtx);
2875         list_for_each_entry(sdata, &local->interfaces, list) {
2876                 /* it might be waiting for the local->mtx, but then
2877                  * by the time it gets it, sdata->wdev.cac_started
2878                  * will no longer be true
2879                  */
2880                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2881 
2882                 if (sdata->wdev.cac_started) {
2883                         chandef = sdata->vif.bss_conf.chandef;
2884                         ieee80211_vif_release_channel(sdata);
2885                         cfg80211_cac_event(sdata->dev,
2886                                            &chandef,
2887                                            NL80211_RADAR_CAC_ABORTED,
2888                                            GFP_KERNEL);
2889                 }
2890         }
2891         mutex_unlock(&local->mtx);
2892 }
2893 
2894 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2895 {
2896         struct ieee80211_local *local =
2897                 container_of(work, struct ieee80211_local, radar_detected_work);
2898         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2899         struct ieee80211_chanctx *ctx;
2900         int num_chanctx = 0;
2901 
2902         mutex_lock(&local->chanctx_mtx);
2903         list_for_each_entry(ctx, &local->chanctx_list, list) {
2904                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2905                         continue;
2906 
2907                 num_chanctx++;
2908                 chandef = ctx->conf.def;
2909         }
2910         mutex_unlock(&local->chanctx_mtx);
2911 
2912         rtnl_lock();
2913         ieee80211_dfs_cac_cancel(local);
2914         rtnl_unlock();
2915 
2916         if (num_chanctx > 1)
2917                 /* XXX: multi-channel is not supported yet */
2918                 WARN_ON(1);
2919         else
2920                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2921 }
2922 
2923 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2924 {
2925         struct ieee80211_local *local = hw_to_local(hw);
2926 
2927         trace_api_radar_detected(local);
2928 
2929         schedule_work(&local->radar_detected_work);
2930 }
2931 EXPORT_SYMBOL(ieee80211_radar_detected);
2932 
2933 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2934 {
2935         u32 ret;
2936         int tmp;
2937 
2938         switch (c->width) {
2939         case NL80211_CHAN_WIDTH_20:
2940                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2941                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2942                 break;
2943         case NL80211_CHAN_WIDTH_40:
2944                 c->width = NL80211_CHAN_WIDTH_20;
2945                 c->center_freq1 = c->chan->center_freq;
2946                 ret = IEEE80211_STA_DISABLE_40MHZ |
2947                       IEEE80211_STA_DISABLE_VHT;
2948                 break;
2949         case NL80211_CHAN_WIDTH_80:
2950                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2951                 /* n_P40 */
2952                 tmp /= 2;
2953                 /* freq_P40 */
2954                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2955                 c->width = NL80211_CHAN_WIDTH_40;
2956                 ret = IEEE80211_STA_DISABLE_VHT;
2957                 break;
2958         case NL80211_CHAN_WIDTH_80P80:
2959                 c->center_freq2 = 0;
2960                 c->width = NL80211_CHAN_WIDTH_80;
2961                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2962                       IEEE80211_STA_DISABLE_160MHZ;
2963                 break;
2964         case NL80211_CHAN_WIDTH_160:
2965                 /* n_P20 */
2966                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2967                 /* n_P80 */
2968                 tmp /= 4;
2969                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2970                 c->width = NL80211_CHAN_WIDTH_80;
2971                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2972                       IEEE80211_STA_DISABLE_160MHZ;
2973                 break;
2974         default:
2975         case NL80211_CHAN_WIDTH_20_NOHT:
2976                 WARN_ON_ONCE(1);
2977                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2978                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2979                 break;
2980         case NL80211_CHAN_WIDTH_5:
2981         case NL80211_CHAN_WIDTH_10:
2982                 WARN_ON_ONCE(1);
2983                 /* keep c->width */
2984                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2985                 break;
2986         }
2987 
2988         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2989 
2990         return ret;
2991 }
2992 
2993 /*
2994  * Returns true if smps_mode_new is strictly more restrictive than
2995  * smps_mode_old.
2996  */
2997 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2998                                    enum ieee80211_smps_mode smps_mode_new)
2999 {
3000         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3001                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3002                 return false;
3003 
3004         switch (smps_mode_old) {
3005         case IEEE80211_SMPS_STATIC:
3006                 return false;
3007         case IEEE80211_SMPS_DYNAMIC:
3008                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3009         case IEEE80211_SMPS_OFF:
3010                 return smps_mode_new != IEEE80211_SMPS_OFF;
3011         default:
3012                 WARN_ON(1);
3013         }
3014 
3015         return false;
3016 }
3017 
3018 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3019                               struct cfg80211_csa_settings *csa_settings)
3020 {
3021         struct sk_buff *skb;
3022         struct ieee80211_mgmt *mgmt;
3023         struct ieee80211_local *local = sdata->local;
3024         int freq;
3025         int hdr_len = offsetofend(struct ieee80211_mgmt,
3026                                   u.action.u.chan_switch);
3027         u8 *pos;
3028 
3029         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3030             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3031                 return -EOPNOTSUPP;
3032 
3033         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3034                             5 + /* channel switch announcement element */
3035                             3 + /* secondary channel offset element */
3036                             5 + /* wide bandwidth channel switch announcement */
3037                             8); /* mesh channel switch parameters element */
3038         if (!skb)
3039                 return -ENOMEM;
3040 
3041         skb_reserve(skb, local->tx_headroom);
3042         mgmt = skb_put_zero(skb, hdr_len);
3043         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3044                                           IEEE80211_STYPE_ACTION);
3045 
3046         eth_broadcast_addr(mgmt->da);
3047         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3048         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3049                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3050         } else {
3051                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3052                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3053         }
3054         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3055         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3056         pos = skb_put(skb, 5);
3057         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3058         *pos++ = 3;                                             /* IE length */
3059         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3060         freq = csa_settings->chandef.chan->center_freq;
3061         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3062         *pos++ = csa_settings->count;                           /* count */
3063 
3064         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3065                 enum nl80211_channel_type ch_type;
3066 
3067                 skb_put(skb, 3);
3068                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3069                 *pos++ = 1;                                     /* IE length */
3070                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3071                 if (ch_type == NL80211_CHAN_HT40PLUS)
3072                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3073                 else
3074                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3075         }
3076 
3077         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3078                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3079 
3080                 skb_put(skb, 8);
3081                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3082                 *pos++ = 6;                                     /* IE length */
3083                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3084                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3085                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3086                 *pos++ |= csa_settings->block_tx ?
3087                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3088                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3089                 pos += 2;
3090                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3091                 pos += 2;
3092         }
3093 
3094         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3095             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3096             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3097                 skb_put(skb, 5);
3098                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3099         }
3100 
3101         ieee80211_tx_skb(sdata, skb);
3102         return 0;
3103 }
3104 
3105 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3106 {
3107         return !(cs == NULL || cs->cipher == 0 ||
3108                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3109                  cs->hdr_len <= cs->key_idx_off ||
3110                  cs->key_idx_shift > 7 ||
3111                  cs->key_idx_mask == 0);
3112 }
3113 
3114 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3115 {
3116         int i;
3117 
3118         /* Ensure we have enough iftype bitmap space for all iftype values */
3119         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3120 
3121         for (i = 0; i < n; i++)
3122                 if (!ieee80211_cs_valid(&cs[i]))
3123                         return false;
3124 
3125         return true;
3126 }
3127 
3128 const struct ieee80211_cipher_scheme *
3129 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3130                  enum nl80211_iftype iftype)
3131 {
3132         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3133         int n = local->hw.n_cipher_schemes;
3134         int i;
3135         const struct ieee80211_cipher_scheme *cs = NULL;
3136 
3137         for (i = 0; i < n; i++) {
3138                 if (l[i].cipher == cipher) {
3139                         cs = &l[i];
3140                         break;
3141                 }
3142         }
3143 
3144         if (!cs || !(cs->iftype & BIT(iftype)))
3145                 return NULL;
3146 
3147         return cs;
3148 }
3149 
3150 int ieee80211_cs_headroom(struct ieee80211_local *local,
3151                           struct cfg80211_crypto_settings *crypto,
3152                           enum nl80211_iftype iftype)
3153 {
3154         const struct ieee80211_cipher_scheme *cs;
3155         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3156         int i;
3157 
3158         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3159                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3160                                       iftype);
3161 
3162                 if (cs && headroom < cs->hdr_len)
3163                         headroom = cs->hdr_len;
3164         }
3165 
3166         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3167         if (cs && headroom < cs->hdr_len)
3168                 headroom = cs->hdr_len;
3169 
3170         return headroom;
3171 }
3172 
3173 static bool
3174 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3175 {
3176         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3177         int skip;
3178 
3179         if (end > 0)
3180                 return false;
3181 
3182         /* One shot NOA  */
3183         if (data->count[i] == 1)
3184                 return false;
3185 
3186         if (data->desc[i].interval == 0)
3187                 return false;
3188 
3189         /* End time is in the past, check for repetitions */
3190         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3191         if (data->count[i] < 255) {
3192                 if (data->count[i] <= skip) {
3193                         data->count[i] = 0;
3194                         return false;
3195                 }
3196 
3197                 data->count[i] -= skip;
3198         }
3199 
3200         data->desc[i].start += skip * data->desc[i].interval;
3201 
3202         return true;
3203 }
3204 
3205 static bool
3206 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3207                              s32 *offset)
3208 {
3209         bool ret = false;
3210         int i;
3211 
3212         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3213                 s32 cur;
3214 
3215                 if (!data->count[i])
3216                         continue;
3217 
3218                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3219                         ret = true;
3220 
3221                 cur = data->desc[i].start - tsf;
3222                 if (cur > *offset)
3223                         continue;
3224 
3225                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3226                 if (cur > *offset)
3227                         *offset = cur;
3228         }
3229 
3230         return ret;
3231 }
3232 
3233 static u32
3234 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3235 {
3236         s32 offset = 0;
3237         int tries = 0;
3238         /*
3239          * arbitrary limit, used to avoid infinite loops when combined NoA
3240          * descriptors cover the full time period.
3241          */
3242         int max_tries = 5;
3243 
3244         ieee80211_extend_absent_time(data, tsf, &offset);
3245         do {
3246                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3247                         break;
3248 
3249                 tries++;
3250         } while (tries < max_tries);
3251 
3252         return offset;
3253 }
3254 
3255 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3256 {
3257         u32 next_offset = BIT(31) - 1;
3258         int i;
3259 
3260         data->absent = 0;
3261         data->has_next_tsf = false;
3262         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3263                 s32 start;
3264 
3265                 if (!data->count[i])
3266                         continue;
3267 
3268                 ieee80211_extend_noa_desc(data, tsf, i);
3269                 start = data->desc[i].start - tsf;
3270                 if (start <= 0)
3271                         data->absent |= BIT(i);
3272 
3273                 if (next_offset > start)
3274                         next_offset = start;
3275 
3276                 data->has_next_tsf = true;
3277         }
3278 
3279         if (data->absent)
3280                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3281 
3282         data->next_tsf = tsf + next_offset;
3283 }
3284 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3285 
3286 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3287                             struct ieee80211_noa_data *data, u32 tsf)
3288 {
3289         int ret = 0;
3290         int i;
3291 
3292         memset(data, 0, sizeof(*data));
3293 
3294         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3295                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3296 
3297                 if (!desc->count || !desc->duration)
3298                         continue;
3299 
3300                 data->count[i] = desc->count;
3301                 data->desc[i].start = le32_to_cpu(desc->start_time);
3302                 data->desc[i].duration = le32_to_cpu(desc->duration);
3303                 data->desc[i].interval = le32_to_cpu(desc->interval);
3304 
3305                 if (data->count[i] > 1 &&
3306                     data->desc[i].interval < data->desc[i].duration)
3307                         continue;
3308 
3309                 ieee80211_extend_noa_desc(data, tsf, i);
3310                 ret++;
3311         }
3312 
3313         if (ret)
3314                 ieee80211_update_p2p_noa(data, tsf);
3315 
3316         return ret;
3317 }
3318 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3319 
3320 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3321                            struct ieee80211_sub_if_data *sdata)
3322 {
3323         u64 tsf = drv_get_tsf(local, sdata);
3324         u64 dtim_count = 0;
3325         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3326         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3327         struct ps_data *ps;
3328         u8 bcns_from_dtim;
3329 
3330         if (tsf == -1ULL || !beacon_int || !dtim_period)
3331                 return;
3332 
3333         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3334             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3335                 if (!sdata->bss)
3336                         return;
3337 
3338                 ps = &sdata->bss->ps;
3339         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3340                 ps = &sdata->u.mesh.ps;
3341         } else {
3342                 return;
3343         }
3344 
3345         /*
3346          * actually finds last dtim_count, mac80211 will update in
3347          * __beacon_add_tim().
3348          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3349          */
3350         do_div(tsf, beacon_int);
3351         bcns_from_dtim = do_div(tsf, dtim_period);
3352         /* just had a DTIM */
3353         if (!bcns_from_dtim)
3354                 dtim_count = 0;
3355         else
3356                 dtim_count = dtim_period - bcns_from_dtim;
3357 
3358         ps->dtim_count = dtim_count;
3359 }
3360 
3361 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3362                                          struct ieee80211_chanctx *ctx)
3363 {
3364         struct ieee80211_sub_if_data *sdata;
3365         u8 radar_detect = 0;
3366 
3367         lockdep_assert_held(&local->chanctx_mtx);
3368 
3369         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3370                 return 0;
3371 
3372         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3373                 if (sdata->reserved_radar_required)
3374                         radar_detect |= BIT(sdata->reserved_chandef.width);
3375 
3376         /*
3377          * An in-place reservation context should not have any assigned vifs
3378          * until it replaces the other context.
3379          */
3380         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3381                 !list_empty(&ctx->assigned_vifs));
3382 
3383         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3384                 if (sdata->radar_required)
3385                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3386 
3387         return radar_detect;
3388 }
3389 
3390 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3391                                  const struct cfg80211_chan_def *chandef,
3392                                  enum ieee80211_chanctx_mode chanmode,
3393                                  u8 radar_detect)
3394 {
3395         struct ieee80211_local *local = sdata->local;
3396         struct ieee80211_sub_if_data *sdata_iter;
3397         enum nl80211_iftype iftype = sdata->wdev.iftype;
3398         struct ieee80211_chanctx *ctx;
3399         int total = 1;
3400         struct iface_combination_params params = {
3401                 .radar_detect = radar_detect,
3402         };
3403 
3404         lockdep_assert_held(&local->chanctx_mtx);
3405 
3406         if (WARN_ON(hweight32(radar_detect) > 1))
3407                 return -EINVAL;
3408 
3409         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3410                     !chandef->chan))
3411                 return -EINVAL;
3412 
3413         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3414                 return -EINVAL;
3415 
3416         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3417             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3418                 /*
3419                  * always passing this is harmless, since it'll be the
3420                  * same value that cfg80211 finds if it finds the same
3421                  * interface ... and that's always allowed
3422                  */
3423                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3424         }
3425 
3426         /* Always allow software iftypes */
3427         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3428                 if (radar_detect)
3429                         return -EINVAL;
3430                 return 0;
3431         }
3432 
3433         if (chandef)
3434                 params.num_different_channels = 1;
3435 
3436         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3437                 params.iftype_num[iftype] = 1;
3438 
3439         list_for_each_entry(ctx, &local->chanctx_list, list) {
3440                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3441                         continue;
3442                 params.radar_detect |=
3443                         ieee80211_chanctx_radar_detect(local, ctx);
3444                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3445                         params.num_different_channels++;
3446                         continue;
3447                 }
3448                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3449                     cfg80211_chandef_compatible(chandef,
3450                                                 &ctx->conf.def))
3451                         continue;
3452                 params.num_different_channels++;
3453         }
3454 
3455         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3456                 struct wireless_dev *wdev_iter;
3457 
3458                 wdev_iter = &sdata_iter->wdev;
3459 
3460                 if (sdata_iter == sdata ||
3461                     !ieee80211_sdata_running(sdata_iter) ||
3462                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3463                         continue;
3464 
3465                 params.iftype_num[wdev_iter->iftype]++;
3466                 total++;
3467         }
3468 
3469         if (total == 1 && !params.radar_detect)
3470                 return 0;
3471 
3472         return cfg80211_check_combinations(local->hw.wiphy, &params);
3473 }
3474 
3475 static void
3476 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3477                          void *data)
3478 {
3479         u32 *max_num_different_channels = data;
3480 
3481         *max_num_different_channels = max(*max_num_different_channels,
3482                                           c->num_different_channels);
3483 }
3484 
3485 int ieee80211_max_num_channels(struct ieee80211_local *local)
3486 {
3487         struct ieee80211_sub_if_data *sdata;
3488         struct ieee80211_chanctx *ctx;
3489         u32 max_num_different_channels = 1;
3490         int err;
3491         struct iface_combination_params params = {0};
3492 
3493         lockdep_assert_held(&local->chanctx_mtx);
3494 
3495         list_for_each_entry(ctx, &local->chanctx_list, list) {
3496                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3497                         continue;
3498 
3499                 params.num_different_channels++;
3500 
3501                 params.radar_detect |=
3502                         ieee80211_chanctx_radar_detect(local, ctx);
3503         }
3504 
3505         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3506                 params.iftype_num[sdata->wdev.iftype]++;
3507 
3508         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3509                                          ieee80211_iter_max_chans,
3510                                          &max_num_different_channels);
3511         if (err < 0)
3512                 return err;
3513 
3514         return max_num_different_channels;
3515 }
3516 
3517 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3518 {
3519         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3520         *buf++ = 7; /* len */
3521         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3522         *buf++ = 0x50;
3523         *buf++ = 0xf2;
3524         *buf++ = 2; /* WME */
3525         *buf++ = 0; /* WME info */
3526         *buf++ = 1; /* WME ver */
3527         *buf++ = qosinfo; /* U-APSD no in use */
3528 
3529         return buf;
3530 }
3531 
3532 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3533                              unsigned long *frame_cnt,
3534                              unsigned long *byte_cnt)
3535 {
3536         struct txq_info *txqi = to_txq_info(txq);
3537         u32 frag_cnt = 0, frag_bytes = 0;
3538         struct sk_buff *skb;
3539 
3540         skb_queue_walk(&txqi->frags, skb) {
3541                 frag_cnt++;
3542                 frag_bytes += skb->len;
3543         }
3544 
3545         if (frame_cnt)
3546                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3547 
3548         if (byte_cnt)
3549                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3550 }
3551 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3552 
3553 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3554         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3555         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3556         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3557         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3558 };
3559 

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