Merge tag 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux...
[deliverable/linux.git] / net / mac80211 / util.c
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15 #include <net/mac80211.h>
16 #include <linux/netdevice.h>
17 #include <linux/export.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_arp.h>
23 #include <linux/bitmap.h>
24 #include <linux/crc32.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/rtnetlink.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wme.h"
34 #include "led.h"
35 #include "wep.h"
36
37 /* privid for wiphys to determine whether they belong to us or not */
38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39
40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 {
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47 }
48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
49
50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
51 enum nl80211_iftype type)
52 {
53 __le16 fc = hdr->frame_control;
54
55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
57 return NULL;
58
59 if (ieee80211_is_data(fc)) {
60 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
62
63 if (ieee80211_has_a4(fc))
64 return NULL;
65 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
68 return hdr->addr2;
69
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
74 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
76 return hdr->addr3;
77 }
78
79 if (ieee80211_is_ctl(fc)) {
80 if (ieee80211_is_pspoll(fc))
81 return hdr->addr1;
82
83 if (ieee80211_is_back_req(fc)) {
84 switch (type) {
85 case NL80211_IFTYPE_STATION:
86 return hdr->addr2;
87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
89 return hdr->addr1;
90 default:
91 break; /* fall through to the return */
92 }
93 }
94 }
95
96 return NULL;
97 }
98
99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
100 {
101 struct sk_buff *skb;
102 struct ieee80211_hdr *hdr;
103
104 skb_queue_walk(&tx->skbs, skb) {
105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
107 }
108 }
109
110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
111 int rate, int erp, int short_preamble,
112 int shift)
113 {
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
126 */
127
128 if (band == IEEE80211_BAND_5GHZ || erp) {
129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
142 dur = 16; /* SIFS + signal ext */
143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175 }
176
177 /* Exported duration function for driver use */
178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
180 enum ieee80211_band band,
181 size_t frame_len,
182 struct ieee80211_rate *rate)
183 {
184 struct ieee80211_sub_if_data *sdata;
185 u16 dur;
186 int erp, shift = 0;
187 bool short_preamble = false;
188
189 erp = 0;
190 if (vif) {
191 sdata = vif_to_sdata(vif);
192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
195 shift = ieee80211_vif_get_shift(vif);
196 }
197
198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
199 short_preamble, shift);
200
201 return cpu_to_le16(dur);
202 }
203 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
207 const struct ieee80211_tx_info *frame_txctl)
208 {
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
211 struct ieee80211_sub_if_data *sdata;
212 bool short_preamble;
213 int erp, shift = 0, bitrate;
214 u16 dur;
215 struct ieee80211_supported_band *sband;
216
217 sband = local->hw.wiphy->bands[frame_txctl->band];
218
219 short_preamble = false;
220
221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
222
223 erp = 0;
224 if (vif) {
225 sdata = vif_to_sdata(vif);
226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
229 shift = ieee80211_vif_get_shift(vif);
230 }
231
232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
234 /* CTS duration */
235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 /* Data frame duration */
238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
239 erp, short_preamble, shift);
240 /* ACK duration */
241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
242 erp, short_preamble, shift);
243
244 return cpu_to_le16(dur);
245 }
246 EXPORT_SYMBOL(ieee80211_rts_duration);
247
248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
250 size_t frame_len,
251 const struct ieee80211_tx_info *frame_txctl)
252 {
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
255 struct ieee80211_sub_if_data *sdata;
256 bool short_preamble;
257 int erp, shift = 0, bitrate;
258 u16 dur;
259 struct ieee80211_supported_band *sband;
260
261 sband = local->hw.wiphy->bands[frame_txctl->band];
262
263 short_preamble = false;
264
265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
266 erp = 0;
267 if (vif) {
268 sdata = vif_to_sdata(vif);
269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
272 shift = ieee80211_vif_get_shift(vif);
273 }
274
275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
277 /* Data frame duration */
278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
279 erp, short_preamble, shift);
280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
281 /* ACK duration */
282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
283 erp, short_preamble, shift);
284 }
285
286 return cpu_to_le16(dur);
287 }
288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291 {
292 struct ieee80211_sub_if_data *sdata;
293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
301 if (!sdata->dev)
302 continue;
303
304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
308 for (ac = 0; ac < n_acs; ac++) {
309 int ac_queue = sdata->vif.hw_queue[ac];
310
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318 }
319
320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
321 enum queue_stop_reason reason,
322 bool refcounted)
323 {
324 struct ieee80211_local *local = hw_to_local(hw);
325
326 trace_wake_queue(local, queue, reason);
327
328 if (WARN_ON(queue >= hw->queues))
329 return;
330
331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
348 ieee80211_propagate_queue_wake(local, queue);
349 rcu_read_unlock();
350 } else
351 tasklet_schedule(&local->tx_pending_tasklet);
352 }
353
354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
355 enum queue_stop_reason reason,
356 bool refcounted)
357 {
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364 }
365
366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367 {
368 ieee80211_wake_queue_by_reason(hw, queue,
369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
371 }
372 EXPORT_SYMBOL(ieee80211_wake_queue);
373
374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
375 enum queue_stop_reason reason,
376 bool refcounted)
377 {
378 struct ieee80211_local *local = hw_to_local(hw);
379 struct ieee80211_sub_if_data *sdata;
380 int n_acs = IEEE80211_NUM_ACS;
381
382 trace_stop_queue(local, queue, reason);
383
384 if (WARN_ON(queue >= hw->queues))
385 return;
386
387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
391
392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
394
395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
398 rcu_read_lock();
399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
402 if (!sdata->dev)
403 continue;
404
405 for (ac = 0; ac < n_acs; ac++) {
406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
411 rcu_read_unlock();
412 }
413
414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
415 enum queue_stop_reason reason,
416 bool refcounted)
417 {
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424 }
425
426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427 {
428 ieee80211_stop_queue_by_reason(hw, queue,
429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
431 }
432 EXPORT_SYMBOL(ieee80211_stop_queue);
433
434 void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436 {
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
440 int queue = info->hw_queue;
441
442 if (WARN_ON(!info->control.vif)) {
443 ieee80211_free_txskb(&local->hw, skb);
444 return;
445 }
446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
450 __skb_queue_tail(&local->pending[queue], skb);
451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454 }
455
456 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
458 {
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
462 int queue, i;
463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
465 while ((skb = skb_dequeue(skbs))) {
466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
469 ieee80211_free_txskb(&local->hw, skb);
470 continue;
471 }
472
473 queue = info->hw_queue;
474
475 __ieee80211_stop_queue(hw, queue,
476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
478
479 __skb_queue_tail(&local->pending[queue], skb);
480 }
481
482 for (i = 0; i < hw->queues; i++)
483 __ieee80211_wake_queue(hw, i,
484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
487 }
488
489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
490 unsigned long queues,
491 enum queue_stop_reason reason,
492 bool refcounted)
493 {
494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
496 int i;
497
498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
500 for_each_set_bit(i, &queues, hw->queues)
501 __ieee80211_stop_queue(hw, i, reason, refcounted);
502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504 }
505
506 void ieee80211_stop_queues(struct ieee80211_hw *hw)
507 {
508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
511 }
512 EXPORT_SYMBOL(ieee80211_stop_queues);
513
514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515 {
516 struct ieee80211_local *local = hw_to_local(hw);
517 unsigned long flags;
518 int ret;
519
520 if (WARN_ON(queue >= hw->queues))
521 return true;
522
523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
528 }
529 EXPORT_SYMBOL(ieee80211_queue_stopped);
530
531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
532 unsigned long queues,
533 enum queue_stop_reason reason,
534 bool refcounted)
535 {
536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
538 int i;
539
540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
542 for_each_set_bit(i, &queues, hw->queues)
543 __ieee80211_wake_queue(hw, i, reason, refcounted);
544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546 }
547
548 void ieee80211_wake_queues(struct ieee80211_hw *hw)
549 {
550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
553 }
554 EXPORT_SYMBOL(ieee80211_wake_queues);
555
556 static unsigned int
557 ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
559 {
560 unsigned int queues;
561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
576 return queues;
577 }
578
579 void __ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
581 unsigned int queues, bool drop)
582 {
583 if (!local->ops->flush)
584 return;
585
586 /*
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
589 */
590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591 queues = ieee80211_get_vif_queues(local, sdata);
592
593 ieee80211_stop_queues_by_reason(&local->hw, queues,
594 IEEE80211_QUEUE_STOP_REASON_FLUSH,
595 false);
596
597 drv_flush(local, sdata, queues, drop);
598
599 ieee80211_wake_queues_by_reason(&local->hw, queues,
600 IEEE80211_QUEUE_STOP_REASON_FLUSH,
601 false);
602 }
603
604 void ieee80211_flush_queues(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata, bool drop)
606 {
607 __ieee80211_flush_queues(local, sdata, 0, drop);
608 }
609
610 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611 struct ieee80211_sub_if_data *sdata,
612 enum queue_stop_reason reason)
613 {
614 ieee80211_stop_queues_by_reason(&local->hw,
615 ieee80211_get_vif_queues(local, sdata),
616 reason, true);
617 }
618
619 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata,
621 enum queue_stop_reason reason)
622 {
623 ieee80211_wake_queues_by_reason(&local->hw,
624 ieee80211_get_vif_queues(local, sdata),
625 reason, true);
626 }
627
628 static void __iterate_active_interfaces(struct ieee80211_local *local,
629 u32 iter_flags,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
632 void *data)
633 {
634 struct ieee80211_sub_if_data *sdata;
635
636 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
637 switch (sdata->vif.type) {
638 case NL80211_IFTYPE_MONITOR:
639 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
640 continue;
641 break;
642 case NL80211_IFTYPE_AP_VLAN:
643 continue;
644 default:
645 break;
646 }
647 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
648 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
649 continue;
650 if (ieee80211_sdata_running(sdata))
651 iterator(data, sdata->vif.addr,
652 &sdata->vif);
653 }
654
655 sdata = rcu_dereference_check(local->monitor_sdata,
656 lockdep_is_held(&local->iflist_mtx) ||
657 lockdep_rtnl_is_held());
658 if (sdata &&
659 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
660 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
661 iterator(data, sdata->vif.addr, &sdata->vif);
662 }
663
664 void ieee80211_iterate_active_interfaces(
665 struct ieee80211_hw *hw, u32 iter_flags,
666 void (*iterator)(void *data, u8 *mac,
667 struct ieee80211_vif *vif),
668 void *data)
669 {
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 mutex_lock(&local->iflist_mtx);
673 __iterate_active_interfaces(local, iter_flags, iterator, data);
674 mutex_unlock(&local->iflist_mtx);
675 }
676 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
677
678 void ieee80211_iterate_active_interfaces_atomic(
679 struct ieee80211_hw *hw, u32 iter_flags,
680 void (*iterator)(void *data, u8 *mac,
681 struct ieee80211_vif *vif),
682 void *data)
683 {
684 struct ieee80211_local *local = hw_to_local(hw);
685
686 rcu_read_lock();
687 __iterate_active_interfaces(local, iter_flags, iterator, data);
688 rcu_read_unlock();
689 }
690 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
691
692 void ieee80211_iterate_active_interfaces_rtnl(
693 struct ieee80211_hw *hw, u32 iter_flags,
694 void (*iterator)(void *data, u8 *mac,
695 struct ieee80211_vif *vif),
696 void *data)
697 {
698 struct ieee80211_local *local = hw_to_local(hw);
699
700 ASSERT_RTNL();
701
702 __iterate_active_interfaces(local, iter_flags, iterator, data);
703 }
704 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
705
706 static void __iterate_stations(struct ieee80211_local *local,
707 void (*iterator)(void *data,
708 struct ieee80211_sta *sta),
709 void *data)
710 {
711 struct sta_info *sta;
712
713 list_for_each_entry_rcu(sta, &local->sta_list, list) {
714 if (!sta->uploaded)
715 continue;
716
717 iterator(data, &sta->sta);
718 }
719 }
720
721 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
722 void (*iterator)(void *data,
723 struct ieee80211_sta *sta),
724 void *data)
725 {
726 struct ieee80211_local *local = hw_to_local(hw);
727
728 rcu_read_lock();
729 __iterate_stations(local, iterator, data);
730 rcu_read_unlock();
731 }
732 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
733
734 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
735 {
736 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
737
738 if (!ieee80211_sdata_running(sdata) ||
739 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
740 return NULL;
741 return &sdata->vif;
742 }
743 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
744
745 /*
746 * Nothing should have been stuffed into the workqueue during
747 * the suspend->resume cycle. Since we can't check each caller
748 * of this function if we are already quiescing / suspended,
749 * check here and don't WARN since this can actually happen when
750 * the rx path (for example) is racing against __ieee80211_suspend
751 * and suspending / quiescing was set after the rx path checked
752 * them.
753 */
754 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
755 {
756 if (local->quiescing || (local->suspended && !local->resuming)) {
757 pr_warn("queueing ieee80211 work while going to suspend\n");
758 return false;
759 }
760
761 return true;
762 }
763
764 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
765 {
766 struct ieee80211_local *local = hw_to_local(hw);
767
768 if (!ieee80211_can_queue_work(local))
769 return;
770
771 queue_work(local->workqueue, work);
772 }
773 EXPORT_SYMBOL(ieee80211_queue_work);
774
775 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
776 struct delayed_work *dwork,
777 unsigned long delay)
778 {
779 struct ieee80211_local *local = hw_to_local(hw);
780
781 if (!ieee80211_can_queue_work(local))
782 return;
783
784 queue_delayed_work(local->workqueue, dwork, delay);
785 }
786 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
787
788 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
789 struct ieee802_11_elems *elems,
790 u64 filter, u32 crc)
791 {
792 size_t left = len;
793 const u8 *pos = start;
794 bool calc_crc = filter != 0;
795 DECLARE_BITMAP(seen_elems, 256);
796 const u8 *ie;
797
798 bitmap_zero(seen_elems, 256);
799 memset(elems, 0, sizeof(*elems));
800 elems->ie_start = start;
801 elems->total_len = len;
802
803 while (left >= 2) {
804 u8 id, elen;
805 bool elem_parse_failed;
806
807 id = *pos++;
808 elen = *pos++;
809 left -= 2;
810
811 if (elen > left) {
812 elems->parse_error = true;
813 break;
814 }
815
816 switch (id) {
817 case WLAN_EID_SSID:
818 case WLAN_EID_SUPP_RATES:
819 case WLAN_EID_FH_PARAMS:
820 case WLAN_EID_DS_PARAMS:
821 case WLAN_EID_CF_PARAMS:
822 case WLAN_EID_TIM:
823 case WLAN_EID_IBSS_PARAMS:
824 case WLAN_EID_CHALLENGE:
825 case WLAN_EID_RSN:
826 case WLAN_EID_ERP_INFO:
827 case WLAN_EID_EXT_SUPP_RATES:
828 case WLAN_EID_HT_CAPABILITY:
829 case WLAN_EID_HT_OPERATION:
830 case WLAN_EID_VHT_CAPABILITY:
831 case WLAN_EID_VHT_OPERATION:
832 case WLAN_EID_MESH_ID:
833 case WLAN_EID_MESH_CONFIG:
834 case WLAN_EID_PEER_MGMT:
835 case WLAN_EID_PREQ:
836 case WLAN_EID_PREP:
837 case WLAN_EID_PERR:
838 case WLAN_EID_RANN:
839 case WLAN_EID_CHANNEL_SWITCH:
840 case WLAN_EID_EXT_CHANSWITCH_ANN:
841 case WLAN_EID_COUNTRY:
842 case WLAN_EID_PWR_CONSTRAINT:
843 case WLAN_EID_TIMEOUT_INTERVAL:
844 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
845 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
846 case WLAN_EID_CHAN_SWITCH_PARAM:
847 case WLAN_EID_EXT_CAPABILITY:
848 case WLAN_EID_CHAN_SWITCH_TIMING:
849 case WLAN_EID_LINK_ID:
850 /*
851 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
852 * that if the content gets bigger it might be needed more than once
853 */
854 if (test_bit(id, seen_elems)) {
855 elems->parse_error = true;
856 left -= elen;
857 pos += elen;
858 continue;
859 }
860 break;
861 }
862
863 if (calc_crc && id < 64 && (filter & (1ULL << id)))
864 crc = crc32_be(crc, pos - 2, elen + 2);
865
866 elem_parse_failed = false;
867
868 switch (id) {
869 case WLAN_EID_LINK_ID:
870 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
871 elem_parse_failed = true;
872 break;
873 }
874 elems->lnk_id = (void *)(pos - 2);
875 break;
876 case WLAN_EID_CHAN_SWITCH_TIMING:
877 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
878 elem_parse_failed = true;
879 break;
880 }
881 elems->ch_sw_timing = (void *)pos;
882 break;
883 case WLAN_EID_EXT_CAPABILITY:
884 elems->ext_capab = pos;
885 elems->ext_capab_len = elen;
886 break;
887 case WLAN_EID_SSID:
888 elems->ssid = pos;
889 elems->ssid_len = elen;
890 break;
891 case WLAN_EID_SUPP_RATES:
892 elems->supp_rates = pos;
893 elems->supp_rates_len = elen;
894 break;
895 case WLAN_EID_DS_PARAMS:
896 if (elen >= 1)
897 elems->ds_params = pos;
898 else
899 elem_parse_failed = true;
900 break;
901 case WLAN_EID_TIM:
902 if (elen >= sizeof(struct ieee80211_tim_ie)) {
903 elems->tim = (void *)pos;
904 elems->tim_len = elen;
905 } else
906 elem_parse_failed = true;
907 break;
908 case WLAN_EID_CHALLENGE:
909 elems->challenge = pos;
910 elems->challenge_len = elen;
911 break;
912 case WLAN_EID_VENDOR_SPECIFIC:
913 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
914 pos[2] == 0xf2) {
915 /* Microsoft OUI (00:50:F2) */
916
917 if (calc_crc)
918 crc = crc32_be(crc, pos - 2, elen + 2);
919
920 if (elen >= 5 && pos[3] == 2) {
921 /* OUI Type 2 - WMM IE */
922 if (pos[4] == 0) {
923 elems->wmm_info = pos;
924 elems->wmm_info_len = elen;
925 } else if (pos[4] == 1) {
926 elems->wmm_param = pos;
927 elems->wmm_param_len = elen;
928 }
929 }
930 }
931 break;
932 case WLAN_EID_RSN:
933 elems->rsn = pos;
934 elems->rsn_len = elen;
935 break;
936 case WLAN_EID_ERP_INFO:
937 if (elen >= 1)
938 elems->erp_info = pos;
939 else
940 elem_parse_failed = true;
941 break;
942 case WLAN_EID_EXT_SUPP_RATES:
943 elems->ext_supp_rates = pos;
944 elems->ext_supp_rates_len = elen;
945 break;
946 case WLAN_EID_HT_CAPABILITY:
947 if (elen >= sizeof(struct ieee80211_ht_cap))
948 elems->ht_cap_elem = (void *)pos;
949 else
950 elem_parse_failed = true;
951 break;
952 case WLAN_EID_HT_OPERATION:
953 if (elen >= sizeof(struct ieee80211_ht_operation))
954 elems->ht_operation = (void *)pos;
955 else
956 elem_parse_failed = true;
957 break;
958 case WLAN_EID_VHT_CAPABILITY:
959 if (elen >= sizeof(struct ieee80211_vht_cap))
960 elems->vht_cap_elem = (void *)pos;
961 else
962 elem_parse_failed = true;
963 break;
964 case WLAN_EID_VHT_OPERATION:
965 if (elen >= sizeof(struct ieee80211_vht_operation))
966 elems->vht_operation = (void *)pos;
967 else
968 elem_parse_failed = true;
969 break;
970 case WLAN_EID_OPMODE_NOTIF:
971 if (elen > 0)
972 elems->opmode_notif = pos;
973 else
974 elem_parse_failed = true;
975 break;
976 case WLAN_EID_MESH_ID:
977 elems->mesh_id = pos;
978 elems->mesh_id_len = elen;
979 break;
980 case WLAN_EID_MESH_CONFIG:
981 if (elen >= sizeof(struct ieee80211_meshconf_ie))
982 elems->mesh_config = (void *)pos;
983 else
984 elem_parse_failed = true;
985 break;
986 case WLAN_EID_PEER_MGMT:
987 elems->peering = pos;
988 elems->peering_len = elen;
989 break;
990 case WLAN_EID_MESH_AWAKE_WINDOW:
991 if (elen >= 2)
992 elems->awake_window = (void *)pos;
993 break;
994 case WLAN_EID_PREQ:
995 elems->preq = pos;
996 elems->preq_len = elen;
997 break;
998 case WLAN_EID_PREP:
999 elems->prep = pos;
1000 elems->prep_len = elen;
1001 break;
1002 case WLAN_EID_PERR:
1003 elems->perr = pos;
1004 elems->perr_len = elen;
1005 break;
1006 case WLAN_EID_RANN:
1007 if (elen >= sizeof(struct ieee80211_rann_ie))
1008 elems->rann = (void *)pos;
1009 else
1010 elem_parse_failed = true;
1011 break;
1012 case WLAN_EID_CHANNEL_SWITCH:
1013 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1014 elem_parse_failed = true;
1015 break;
1016 }
1017 elems->ch_switch_ie = (void *)pos;
1018 break;
1019 case WLAN_EID_EXT_CHANSWITCH_ANN:
1020 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1021 elem_parse_failed = true;
1022 break;
1023 }
1024 elems->ext_chansw_ie = (void *)pos;
1025 break;
1026 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1027 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1028 elem_parse_failed = true;
1029 break;
1030 }
1031 elems->sec_chan_offs = (void *)pos;
1032 break;
1033 case WLAN_EID_CHAN_SWITCH_PARAM:
1034 if (elen !=
1035 sizeof(*elems->mesh_chansw_params_ie)) {
1036 elem_parse_failed = true;
1037 break;
1038 }
1039 elems->mesh_chansw_params_ie = (void *)pos;
1040 break;
1041 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1042 if (!action ||
1043 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1044 elem_parse_failed = true;
1045 break;
1046 }
1047 elems->wide_bw_chansw_ie = (void *)pos;
1048 break;
1049 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1050 if (action) {
1051 elem_parse_failed = true;
1052 break;
1053 }
1054 /*
1055 * This is a bit tricky, but as we only care about
1056 * the wide bandwidth channel switch element, so
1057 * just parse it out manually.
1058 */
1059 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1060 pos, elen);
1061 if (ie) {
1062 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1063 elems->wide_bw_chansw_ie =
1064 (void *)(ie + 2);
1065 else
1066 elem_parse_failed = true;
1067 }
1068 break;
1069 case WLAN_EID_COUNTRY:
1070 elems->country_elem = pos;
1071 elems->country_elem_len = elen;
1072 break;
1073 case WLAN_EID_PWR_CONSTRAINT:
1074 if (elen != 1) {
1075 elem_parse_failed = true;
1076 break;
1077 }
1078 elems->pwr_constr_elem = pos;
1079 break;
1080 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1081 /* Lots of different options exist, but we only care
1082 * about the Dynamic Transmit Power Control element.
1083 * First check for the Cisco OUI, then for the DTPC
1084 * tag (0x00).
1085 */
1086 if (elen < 4) {
1087 elem_parse_failed = true;
1088 break;
1089 }
1090
1091 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1092 pos[2] != 0x96 || pos[3] != 0x00)
1093 break;
1094
1095 if (elen != 6) {
1096 elem_parse_failed = true;
1097 break;
1098 }
1099
1100 if (calc_crc)
1101 crc = crc32_be(crc, pos - 2, elen + 2);
1102
1103 elems->cisco_dtpc_elem = pos;
1104 break;
1105 case WLAN_EID_TIMEOUT_INTERVAL:
1106 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1107 elems->timeout_int = (void *)pos;
1108 else
1109 elem_parse_failed = true;
1110 break;
1111 default:
1112 break;
1113 }
1114
1115 if (elem_parse_failed)
1116 elems->parse_error = true;
1117 else
1118 __set_bit(id, seen_elems);
1119
1120 left -= elen;
1121 pos += elen;
1122 }
1123
1124 if (left != 0)
1125 elems->parse_error = true;
1126
1127 return crc;
1128 }
1129
1130 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1131 bool bss_notify)
1132 {
1133 struct ieee80211_local *local = sdata->local;
1134 struct ieee80211_tx_queue_params qparam;
1135 struct ieee80211_chanctx_conf *chanctx_conf;
1136 int ac;
1137 bool use_11b, enable_qos;
1138 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1139 int aCWmin, aCWmax;
1140
1141 if (!local->ops->conf_tx)
1142 return;
1143
1144 if (local->hw.queues < IEEE80211_NUM_ACS)
1145 return;
1146
1147 memset(&qparam, 0, sizeof(qparam));
1148
1149 rcu_read_lock();
1150 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1151 use_11b = (chanctx_conf &&
1152 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1153 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1154 rcu_read_unlock();
1155
1156 /*
1157 * By default disable QoS in STA mode for old access points, which do
1158 * not support 802.11e. New APs will provide proper queue parameters,
1159 * that we will configure later.
1160 */
1161 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1162
1163 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1164
1165 /* Set defaults according to 802.11-2007 Table 7-37 */
1166 aCWmax = 1023;
1167 if (use_11b)
1168 aCWmin = 31;
1169 else
1170 aCWmin = 15;
1171
1172 /* Confiure old 802.11b/g medium access rules. */
1173 qparam.cw_max = aCWmax;
1174 qparam.cw_min = aCWmin;
1175 qparam.txop = 0;
1176 qparam.aifs = 2;
1177
1178 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1179 /* Update if QoS is enabled. */
1180 if (enable_qos) {
1181 switch (ac) {
1182 case IEEE80211_AC_BK:
1183 qparam.cw_max = aCWmax;
1184 qparam.cw_min = aCWmin;
1185 qparam.txop = 0;
1186 if (is_ocb)
1187 qparam.aifs = 9;
1188 else
1189 qparam.aifs = 7;
1190 break;
1191 /* never happens but let's not leave undefined */
1192 default:
1193 case IEEE80211_AC_BE:
1194 qparam.cw_max = aCWmax;
1195 qparam.cw_min = aCWmin;
1196 qparam.txop = 0;
1197 if (is_ocb)
1198 qparam.aifs = 6;
1199 else
1200 qparam.aifs = 3;
1201 break;
1202 case IEEE80211_AC_VI:
1203 qparam.cw_max = aCWmin;
1204 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1205 if (is_ocb)
1206 qparam.txop = 0;
1207 else if (use_11b)
1208 qparam.txop = 6016/32;
1209 else
1210 qparam.txop = 3008/32;
1211
1212 if (is_ocb)
1213 qparam.aifs = 3;
1214 else
1215 qparam.aifs = 2;
1216 break;
1217 case IEEE80211_AC_VO:
1218 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1219 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1220 if (is_ocb)
1221 qparam.txop = 0;
1222 else if (use_11b)
1223 qparam.txop = 3264/32;
1224 else
1225 qparam.txop = 1504/32;
1226 qparam.aifs = 2;
1227 break;
1228 }
1229 }
1230
1231 qparam.uapsd = false;
1232
1233 sdata->tx_conf[ac] = qparam;
1234 drv_conf_tx(local, sdata, ac, &qparam);
1235 }
1236
1237 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1238 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1239 sdata->vif.bss_conf.qos = enable_qos;
1240 if (bss_notify)
1241 ieee80211_bss_info_change_notify(sdata,
1242 BSS_CHANGED_QOS);
1243 }
1244 }
1245
1246 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1247 u16 transaction, u16 auth_alg, u16 status,
1248 const u8 *extra, size_t extra_len, const u8 *da,
1249 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1250 u32 tx_flags)
1251 {
1252 struct ieee80211_local *local = sdata->local;
1253 struct sk_buff *skb;
1254 struct ieee80211_mgmt *mgmt;
1255 int err;
1256
1257 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1258 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1259 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1260 if (!skb)
1261 return;
1262
1263 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1264
1265 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1266 memset(mgmt, 0, 24 + 6);
1267 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1268 IEEE80211_STYPE_AUTH);
1269 memcpy(mgmt->da, da, ETH_ALEN);
1270 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1271 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1272 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1273 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1274 mgmt->u.auth.status_code = cpu_to_le16(status);
1275 if (extra)
1276 memcpy(skb_put(skb, extra_len), extra, extra_len);
1277
1278 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1279 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1280 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1281 WARN_ON(err);
1282 }
1283
1284 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1285 tx_flags;
1286 ieee80211_tx_skb(sdata, skb);
1287 }
1288
1289 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1290 const u8 *bssid, u16 stype, u16 reason,
1291 bool send_frame, u8 *frame_buf)
1292 {
1293 struct ieee80211_local *local = sdata->local;
1294 struct sk_buff *skb;
1295 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1296
1297 /* build frame */
1298 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1299 mgmt->duration = 0; /* initialize only */
1300 mgmt->seq_ctrl = 0; /* initialize only */
1301 memcpy(mgmt->da, bssid, ETH_ALEN);
1302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1303 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1304 /* u.deauth.reason_code == u.disassoc.reason_code */
1305 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1306
1307 if (send_frame) {
1308 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1309 IEEE80211_DEAUTH_FRAME_LEN);
1310 if (!skb)
1311 return;
1312
1313 skb_reserve(skb, local->hw.extra_tx_headroom);
1314
1315 /* copy in frame */
1316 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1317 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1318
1319 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1320 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1321 IEEE80211_SKB_CB(skb)->flags |=
1322 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1323
1324 ieee80211_tx_skb(sdata, skb);
1325 }
1326 }
1327
1328 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1329 u8 *buffer, size_t buffer_len,
1330 const u8 *ie, size_t ie_len,
1331 enum ieee80211_band band,
1332 u32 rate_mask,
1333 struct cfg80211_chan_def *chandef,
1334 size_t *offset)
1335 {
1336 struct ieee80211_supported_band *sband;
1337 u8 *pos = buffer, *end = buffer + buffer_len;
1338 size_t noffset;
1339 int supp_rates_len, i;
1340 u8 rates[32];
1341 int num_rates;
1342 int ext_rates_len;
1343 int shift;
1344 u32 rate_flags;
1345 bool have_80mhz = false;
1346
1347 *offset = 0;
1348
1349 sband = local->hw.wiphy->bands[band];
1350 if (WARN_ON_ONCE(!sband))
1351 return 0;
1352
1353 rate_flags = ieee80211_chandef_rate_flags(chandef);
1354 shift = ieee80211_chandef_get_shift(chandef);
1355
1356 num_rates = 0;
1357 for (i = 0; i < sband->n_bitrates; i++) {
1358 if ((BIT(i) & rate_mask) == 0)
1359 continue; /* skip rate */
1360 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1361 continue;
1362
1363 rates[num_rates++] =
1364 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1365 (1 << shift) * 5);
1366 }
1367
1368 supp_rates_len = min_t(int, num_rates, 8);
1369
1370 if (end - pos < 2 + supp_rates_len)
1371 goto out_err;
1372 *pos++ = WLAN_EID_SUPP_RATES;
1373 *pos++ = supp_rates_len;
1374 memcpy(pos, rates, supp_rates_len);
1375 pos += supp_rates_len;
1376
1377 /* insert "request information" if in custom IEs */
1378 if (ie && ie_len) {
1379 static const u8 before_extrates[] = {
1380 WLAN_EID_SSID,
1381 WLAN_EID_SUPP_RATES,
1382 WLAN_EID_REQUEST,
1383 };
1384 noffset = ieee80211_ie_split(ie, ie_len,
1385 before_extrates,
1386 ARRAY_SIZE(before_extrates),
1387 *offset);
1388 if (end - pos < noffset - *offset)
1389 goto out_err;
1390 memcpy(pos, ie + *offset, noffset - *offset);
1391 pos += noffset - *offset;
1392 *offset = noffset;
1393 }
1394
1395 ext_rates_len = num_rates - supp_rates_len;
1396 if (ext_rates_len > 0) {
1397 if (end - pos < 2 + ext_rates_len)
1398 goto out_err;
1399 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1400 *pos++ = ext_rates_len;
1401 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1402 pos += ext_rates_len;
1403 }
1404
1405 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1406 if (end - pos < 3)
1407 goto out_err;
1408 *pos++ = WLAN_EID_DS_PARAMS;
1409 *pos++ = 1;
1410 *pos++ = ieee80211_frequency_to_channel(
1411 chandef->chan->center_freq);
1412 }
1413
1414 /* insert custom IEs that go before HT */
1415 if (ie && ie_len) {
1416 static const u8 before_ht[] = {
1417 WLAN_EID_SSID,
1418 WLAN_EID_SUPP_RATES,
1419 WLAN_EID_REQUEST,
1420 WLAN_EID_EXT_SUPP_RATES,
1421 WLAN_EID_DS_PARAMS,
1422 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1423 };
1424 noffset = ieee80211_ie_split(ie, ie_len,
1425 before_ht, ARRAY_SIZE(before_ht),
1426 *offset);
1427 if (end - pos < noffset - *offset)
1428 goto out_err;
1429 memcpy(pos, ie + *offset, noffset - *offset);
1430 pos += noffset - *offset;
1431 *offset = noffset;
1432 }
1433
1434 if (sband->ht_cap.ht_supported) {
1435 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1436 goto out_err;
1437 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1438 sband->ht_cap.cap);
1439 }
1440
1441 /*
1442 * If adding more here, adjust code in main.c
1443 * that calculates local->scan_ies_len.
1444 */
1445
1446 /* insert custom IEs that go before VHT */
1447 if (ie && ie_len) {
1448 static const u8 before_vht[] = {
1449 WLAN_EID_SSID,
1450 WLAN_EID_SUPP_RATES,
1451 WLAN_EID_REQUEST,
1452 WLAN_EID_EXT_SUPP_RATES,
1453 WLAN_EID_DS_PARAMS,
1454 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1455 WLAN_EID_HT_CAPABILITY,
1456 WLAN_EID_BSS_COEX_2040,
1457 WLAN_EID_EXT_CAPABILITY,
1458 WLAN_EID_SSID_LIST,
1459 WLAN_EID_CHANNEL_USAGE,
1460 WLAN_EID_INTERWORKING,
1461 /* mesh ID can't happen here */
1462 /* 60 GHz can't happen here right now */
1463 };
1464 noffset = ieee80211_ie_split(ie, ie_len,
1465 before_vht, ARRAY_SIZE(before_vht),
1466 *offset);
1467 if (end - pos < noffset - *offset)
1468 goto out_err;
1469 memcpy(pos, ie + *offset, noffset - *offset);
1470 pos += noffset - *offset;
1471 *offset = noffset;
1472 }
1473
1474 /* Check if any channel in this sband supports at least 80 MHz */
1475 for (i = 0; i < sband->n_channels; i++) {
1476 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1477 IEEE80211_CHAN_NO_80MHZ))
1478 continue;
1479
1480 have_80mhz = true;
1481 break;
1482 }
1483
1484 if (sband->vht_cap.vht_supported && have_80mhz) {
1485 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1486 goto out_err;
1487 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1488 sband->vht_cap.cap);
1489 }
1490
1491 return pos - buffer;
1492 out_err:
1493 WARN_ONCE(1, "not enough space for preq IEs\n");
1494 return pos - buffer;
1495 }
1496
1497 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1498 size_t buffer_len,
1499 struct ieee80211_scan_ies *ie_desc,
1500 const u8 *ie, size_t ie_len,
1501 u8 bands_used, u32 *rate_masks,
1502 struct cfg80211_chan_def *chandef)
1503 {
1504 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1505 int i;
1506
1507 memset(ie_desc, 0, sizeof(*ie_desc));
1508
1509 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1510 if (bands_used & BIT(i)) {
1511 pos += ieee80211_build_preq_ies_band(local,
1512 buffer + pos,
1513 buffer_len - pos,
1514 ie, ie_len, i,
1515 rate_masks[i],
1516 chandef,
1517 &custom_ie_offset);
1518 ie_desc->ies[i] = buffer + old_pos;
1519 ie_desc->len[i] = pos - old_pos;
1520 old_pos = pos;
1521 }
1522 }
1523
1524 /* add any remaining custom IEs */
1525 if (ie && ie_len) {
1526 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1527 "not enough space for preq custom IEs\n"))
1528 return pos;
1529 memcpy(buffer + pos, ie + custom_ie_offset,
1530 ie_len - custom_ie_offset);
1531 ie_desc->common_ies = buffer + pos;
1532 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1533 pos += ie_len - custom_ie_offset;
1534 }
1535
1536 return pos;
1537 };
1538
1539 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1540 const u8 *src, const u8 *dst,
1541 u32 ratemask,
1542 struct ieee80211_channel *chan,
1543 const u8 *ssid, size_t ssid_len,
1544 const u8 *ie, size_t ie_len,
1545 bool directed)
1546 {
1547 struct ieee80211_local *local = sdata->local;
1548 struct cfg80211_chan_def chandef;
1549 struct sk_buff *skb;
1550 struct ieee80211_mgmt *mgmt;
1551 int ies_len;
1552 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1553 struct ieee80211_scan_ies dummy_ie_desc;
1554
1555 /*
1556 * Do not send DS Channel parameter for directed probe requests
1557 * in order to maximize the chance that we get a response. Some
1558 * badly-behaved APs don't respond when this parameter is included.
1559 */
1560 chandef.width = sdata->vif.bss_conf.chandef.width;
1561 if (directed)
1562 chandef.chan = NULL;
1563 else
1564 chandef.chan = chan;
1565
1566 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1567 100 + ie_len);
1568 if (!skb)
1569 return NULL;
1570
1571 rate_masks[chan->band] = ratemask;
1572 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1573 skb_tailroom(skb), &dummy_ie_desc,
1574 ie, ie_len, BIT(chan->band),
1575 rate_masks, &chandef);
1576 skb_put(skb, ies_len);
1577
1578 if (dst) {
1579 mgmt = (struct ieee80211_mgmt *) skb->data;
1580 memcpy(mgmt->da, dst, ETH_ALEN);
1581 memcpy(mgmt->bssid, dst, ETH_ALEN);
1582 }
1583
1584 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1585
1586 return skb;
1587 }
1588
1589 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1590 const u8 *src, const u8 *dst,
1591 const u8 *ssid, size_t ssid_len,
1592 const u8 *ie, size_t ie_len,
1593 u32 ratemask, bool directed, u32 tx_flags,
1594 struct ieee80211_channel *channel, bool scan)
1595 {
1596 struct sk_buff *skb;
1597
1598 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1599 ssid, ssid_len,
1600 ie, ie_len, directed);
1601 if (skb) {
1602 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1603 if (scan)
1604 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1605 else
1606 ieee80211_tx_skb(sdata, skb);
1607 }
1608 }
1609
1610 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1611 struct ieee802_11_elems *elems,
1612 enum ieee80211_band band, u32 *basic_rates)
1613 {
1614 struct ieee80211_supported_band *sband;
1615 size_t num_rates;
1616 u32 supp_rates, rate_flags;
1617 int i, j, shift;
1618 sband = sdata->local->hw.wiphy->bands[band];
1619
1620 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1621 shift = ieee80211_vif_get_shift(&sdata->vif);
1622
1623 if (WARN_ON(!sband))
1624 return 1;
1625
1626 num_rates = sband->n_bitrates;
1627 supp_rates = 0;
1628 for (i = 0; i < elems->supp_rates_len +
1629 elems->ext_supp_rates_len; i++) {
1630 u8 rate = 0;
1631 int own_rate;
1632 bool is_basic;
1633 if (i < elems->supp_rates_len)
1634 rate = elems->supp_rates[i];
1635 else if (elems->ext_supp_rates)
1636 rate = elems->ext_supp_rates
1637 [i - elems->supp_rates_len];
1638 own_rate = 5 * (rate & 0x7f);
1639 is_basic = !!(rate & 0x80);
1640
1641 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1642 continue;
1643
1644 for (j = 0; j < num_rates; j++) {
1645 int brate;
1646 if ((rate_flags & sband->bitrates[j].flags)
1647 != rate_flags)
1648 continue;
1649
1650 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1651 1 << shift);
1652
1653 if (brate == own_rate) {
1654 supp_rates |= BIT(j);
1655 if (basic_rates && is_basic)
1656 *basic_rates |= BIT(j);
1657 }
1658 }
1659 }
1660 return supp_rates;
1661 }
1662
1663 void ieee80211_stop_device(struct ieee80211_local *local)
1664 {
1665 ieee80211_led_radio(local, false);
1666 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1667
1668 cancel_work_sync(&local->reconfig_filter);
1669
1670 flush_workqueue(local->workqueue);
1671 drv_stop(local);
1672 }
1673
1674 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1675 {
1676 struct ieee80211_sub_if_data *sdata;
1677 struct ieee80211_chanctx *ctx;
1678
1679 /*
1680 * We get here if during resume the device can't be restarted properly.
1681 * We might also get here if this happens during HW reset, which is a
1682 * slightly different situation and we need to drop all connections in
1683 * the latter case.
1684 *
1685 * Ask cfg80211 to turn off all interfaces, this will result in more
1686 * warnings but at least we'll then get into a clean stopped state.
1687 */
1688
1689 local->resuming = false;
1690 local->suspended = false;
1691 local->started = false;
1692
1693 /* scheduled scan clearly can't be running any more, but tell
1694 * cfg80211 and clear local state
1695 */
1696 ieee80211_sched_scan_end(local);
1697
1698 list_for_each_entry(sdata, &local->interfaces, list)
1699 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1700
1701 /* Mark channel contexts as not being in the driver any more to avoid
1702 * removing them from the driver during the shutdown process...
1703 */
1704 mutex_lock(&local->chanctx_mtx);
1705 list_for_each_entry(ctx, &local->chanctx_list, list)
1706 ctx->driver_present = false;
1707 mutex_unlock(&local->chanctx_mtx);
1708
1709 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1710 }
1711
1712 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1713 struct ieee80211_sub_if_data *sdata)
1714 {
1715 struct ieee80211_chanctx_conf *conf;
1716 struct ieee80211_chanctx *ctx;
1717
1718 if (!local->use_chanctx)
1719 return;
1720
1721 mutex_lock(&local->chanctx_mtx);
1722 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1723 lockdep_is_held(&local->chanctx_mtx));
1724 if (conf) {
1725 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1726 drv_assign_vif_chanctx(local, sdata, ctx);
1727 }
1728 mutex_unlock(&local->chanctx_mtx);
1729 }
1730
1731 int ieee80211_reconfig(struct ieee80211_local *local)
1732 {
1733 struct ieee80211_hw *hw = &local->hw;
1734 struct ieee80211_sub_if_data *sdata;
1735 struct ieee80211_chanctx *ctx;
1736 struct sta_info *sta;
1737 int res, i;
1738 bool reconfig_due_to_wowlan = false;
1739 struct ieee80211_sub_if_data *sched_scan_sdata;
1740 struct cfg80211_sched_scan_request *sched_scan_req;
1741 bool sched_scan_stopped = false;
1742
1743 /* nothing to do if HW shouldn't run */
1744 if (!local->open_count)
1745 goto wake_up;
1746
1747 #ifdef CONFIG_PM
1748 if (local->suspended)
1749 local->resuming = true;
1750
1751 if (local->wowlan) {
1752 res = drv_resume(local);
1753 local->wowlan = false;
1754 if (res < 0) {
1755 local->resuming = false;
1756 return res;
1757 }
1758 if (res == 0)
1759 goto wake_up;
1760 WARN_ON(res > 1);
1761 /*
1762 * res is 1, which means the driver requested
1763 * to go through a regular reset on wakeup.
1764 */
1765 reconfig_due_to_wowlan = true;
1766 }
1767 #endif
1768
1769 /*
1770 * Upon resume hardware can sometimes be goofy due to
1771 * various platform / driver / bus issues, so restarting
1772 * the device may at times not work immediately. Propagate
1773 * the error.
1774 */
1775 res = drv_start(local);
1776 if (res) {
1777 if (local->suspended)
1778 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1779 else
1780 WARN(1, "Hardware became unavailable during restart.\n");
1781 ieee80211_handle_reconfig_failure(local);
1782 return res;
1783 }
1784
1785 /* setup fragmentation threshold */
1786 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1787
1788 /* setup RTS threshold */
1789 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1790
1791 /* reset coverage class */
1792 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1793
1794 ieee80211_led_radio(local, true);
1795 ieee80211_mod_tpt_led_trig(local,
1796 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1797
1798 /* add interfaces */
1799 sdata = rtnl_dereference(local->monitor_sdata);
1800 if (sdata) {
1801 /* in HW restart it exists already */
1802 WARN_ON(local->resuming);
1803 res = drv_add_interface(local, sdata);
1804 if (WARN_ON(res)) {
1805 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1806 synchronize_net();
1807 kfree(sdata);
1808 }
1809 }
1810
1811 list_for_each_entry(sdata, &local->interfaces, list) {
1812 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1813 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1814 ieee80211_sdata_running(sdata))
1815 res = drv_add_interface(local, sdata);
1816 }
1817
1818 /* add channel contexts */
1819 if (local->use_chanctx) {
1820 mutex_lock(&local->chanctx_mtx);
1821 list_for_each_entry(ctx, &local->chanctx_list, list)
1822 if (ctx->replace_state !=
1823 IEEE80211_CHANCTX_REPLACES_OTHER)
1824 WARN_ON(drv_add_chanctx(local, ctx));
1825 mutex_unlock(&local->chanctx_mtx);
1826
1827 list_for_each_entry(sdata, &local->interfaces, list) {
1828 if (!ieee80211_sdata_running(sdata))
1829 continue;
1830 ieee80211_assign_chanctx(local, sdata);
1831 }
1832
1833 sdata = rtnl_dereference(local->monitor_sdata);
1834 if (sdata && ieee80211_sdata_running(sdata))
1835 ieee80211_assign_chanctx(local, sdata);
1836 }
1837
1838 /* add STAs back */
1839 mutex_lock(&local->sta_mtx);
1840 list_for_each_entry(sta, &local->sta_list, list) {
1841 enum ieee80211_sta_state state;
1842
1843 if (!sta->uploaded)
1844 continue;
1845
1846 /* AP-mode stations will be added later */
1847 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1848 continue;
1849
1850 for (state = IEEE80211_STA_NOTEXIST;
1851 state < sta->sta_state; state++)
1852 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1853 state + 1));
1854 }
1855 mutex_unlock(&local->sta_mtx);
1856
1857 /* reconfigure tx conf */
1858 if (hw->queues >= IEEE80211_NUM_ACS) {
1859 list_for_each_entry(sdata, &local->interfaces, list) {
1860 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1861 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1862 !ieee80211_sdata_running(sdata))
1863 continue;
1864
1865 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1866 drv_conf_tx(local, sdata, i,
1867 &sdata->tx_conf[i]);
1868 }
1869 }
1870
1871 /* reconfigure hardware */
1872 ieee80211_hw_config(local, ~0);
1873
1874 ieee80211_configure_filter(local);
1875
1876 /* Finally also reconfigure all the BSS information */
1877 list_for_each_entry(sdata, &local->interfaces, list) {
1878 u32 changed;
1879
1880 if (!ieee80211_sdata_running(sdata))
1881 continue;
1882
1883 /* common change flags for all interface types */
1884 changed = BSS_CHANGED_ERP_CTS_PROT |
1885 BSS_CHANGED_ERP_PREAMBLE |
1886 BSS_CHANGED_ERP_SLOT |
1887 BSS_CHANGED_HT |
1888 BSS_CHANGED_BASIC_RATES |
1889 BSS_CHANGED_BEACON_INT |
1890 BSS_CHANGED_BSSID |
1891 BSS_CHANGED_CQM |
1892 BSS_CHANGED_QOS |
1893 BSS_CHANGED_IDLE |
1894 BSS_CHANGED_TXPOWER;
1895
1896 switch (sdata->vif.type) {
1897 case NL80211_IFTYPE_STATION:
1898 changed |= BSS_CHANGED_ASSOC |
1899 BSS_CHANGED_ARP_FILTER |
1900 BSS_CHANGED_PS;
1901
1902 /* Re-send beacon info report to the driver */
1903 if (sdata->u.mgd.have_beacon)
1904 changed |= BSS_CHANGED_BEACON_INFO;
1905
1906 sdata_lock(sdata);
1907 ieee80211_bss_info_change_notify(sdata, changed);
1908 sdata_unlock(sdata);
1909 break;
1910 case NL80211_IFTYPE_OCB:
1911 changed |= BSS_CHANGED_OCB;
1912 ieee80211_bss_info_change_notify(sdata, changed);
1913 break;
1914 case NL80211_IFTYPE_ADHOC:
1915 changed |= BSS_CHANGED_IBSS;
1916 /* fall through */
1917 case NL80211_IFTYPE_AP:
1918 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1919
1920 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1921 changed |= BSS_CHANGED_AP_PROBE_RESP;
1922
1923 if (rcu_access_pointer(sdata->u.ap.beacon))
1924 drv_start_ap(local, sdata);
1925 }
1926
1927 /* fall through */
1928 case NL80211_IFTYPE_MESH_POINT:
1929 if (sdata->vif.bss_conf.enable_beacon) {
1930 changed |= BSS_CHANGED_BEACON |
1931 BSS_CHANGED_BEACON_ENABLED;
1932 ieee80211_bss_info_change_notify(sdata, changed);
1933 }
1934 break;
1935 case NL80211_IFTYPE_WDS:
1936 case NL80211_IFTYPE_AP_VLAN:
1937 case NL80211_IFTYPE_MONITOR:
1938 case NL80211_IFTYPE_P2P_DEVICE:
1939 /* nothing to do */
1940 break;
1941 case NL80211_IFTYPE_UNSPECIFIED:
1942 case NUM_NL80211_IFTYPES:
1943 case NL80211_IFTYPE_P2P_CLIENT:
1944 case NL80211_IFTYPE_P2P_GO:
1945 WARN_ON(1);
1946 break;
1947 }
1948 }
1949
1950 ieee80211_recalc_ps(local, -1);
1951
1952 /*
1953 * The sta might be in psm against the ap (e.g. because
1954 * this was the state before a hw restart), so we
1955 * explicitly send a null packet in order to make sure
1956 * it'll sync against the ap (and get out of psm).
1957 */
1958 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1959 list_for_each_entry(sdata, &local->interfaces, list) {
1960 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1961 continue;
1962 if (!sdata->u.mgd.associated)
1963 continue;
1964
1965 ieee80211_send_nullfunc(local, sdata, 0);
1966 }
1967 }
1968
1969 /* APs are now beaconing, add back stations */
1970 mutex_lock(&local->sta_mtx);
1971 list_for_each_entry(sta, &local->sta_list, list) {
1972 enum ieee80211_sta_state state;
1973
1974 if (!sta->uploaded)
1975 continue;
1976
1977 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1978 continue;
1979
1980 for (state = IEEE80211_STA_NOTEXIST;
1981 state < sta->sta_state; state++)
1982 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1983 state + 1));
1984 }
1985 mutex_unlock(&local->sta_mtx);
1986
1987 /* add back keys */
1988 list_for_each_entry(sdata, &local->interfaces, list)
1989 if (ieee80211_sdata_running(sdata))
1990 ieee80211_enable_keys(sdata);
1991
1992 wake_up:
1993 local->in_reconfig = false;
1994 barrier();
1995
1996 if (local->monitors == local->open_count && local->monitors > 0)
1997 ieee80211_add_virtual_monitor(local);
1998
1999 /*
2000 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2001 * sessions can be established after a resume.
2002 *
2003 * Also tear down aggregation sessions since reconfiguring
2004 * them in a hardware restart scenario is not easily done
2005 * right now, and the hardware will have lost information
2006 * about the sessions, but we and the AP still think they
2007 * are active. This is really a workaround though.
2008 */
2009 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2010 mutex_lock(&local->sta_mtx);
2011
2012 list_for_each_entry(sta, &local->sta_list, list) {
2013 ieee80211_sta_tear_down_BA_sessions(
2014 sta, AGG_STOP_LOCAL_REQUEST);
2015 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2016 }
2017
2018 mutex_unlock(&local->sta_mtx);
2019 }
2020
2021 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2022 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2023 false);
2024
2025 /*
2026 * Reconfigure sched scan if it was interrupted by FW restart or
2027 * suspend.
2028 */
2029 mutex_lock(&local->mtx);
2030 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2031 lockdep_is_held(&local->mtx));
2032 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2033 lockdep_is_held(&local->mtx));
2034 if (sched_scan_sdata && sched_scan_req)
2035 /*
2036 * Sched scan stopped, but we don't want to report it. Instead,
2037 * we're trying to reschedule.
2038 */
2039 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2040 sched_scan_req))
2041 sched_scan_stopped = true;
2042 mutex_unlock(&local->mtx);
2043
2044 if (sched_scan_stopped)
2045 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2046
2047 /*
2048 * If this is for hw restart things are still running.
2049 * We may want to change that later, however.
2050 */
2051 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2052 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2053
2054 if (!local->suspended)
2055 return 0;
2056
2057 #ifdef CONFIG_PM
2058 /* first set suspended false, then resuming */
2059 local->suspended = false;
2060 mb();
2061 local->resuming = false;
2062
2063 /* It's possible that we don't handle the scan completion in
2064 * time during suspend, so if it's still marked as completed
2065 * here, queue the work and flush it to clean things up.
2066 * Instead of calling the worker function directly here, we
2067 * really queue it to avoid potential races with other flows
2068 * scheduling the same work.
2069 */
2070 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2071 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2072 flush_delayed_work(&local->scan_work);
2073 }
2074
2075 if (local->open_count && !reconfig_due_to_wowlan)
2076 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2077
2078 list_for_each_entry(sdata, &local->interfaces, list) {
2079 if (!ieee80211_sdata_running(sdata))
2080 continue;
2081 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2082 ieee80211_sta_restart(sdata);
2083 }
2084
2085 mod_timer(&local->sta_cleanup, jiffies + 1);
2086 #else
2087 WARN_ON(1);
2088 #endif
2089
2090 return 0;
2091 }
2092
2093 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2094 {
2095 struct ieee80211_sub_if_data *sdata;
2096 struct ieee80211_local *local;
2097 struct ieee80211_key *key;
2098
2099 if (WARN_ON(!vif))
2100 return;
2101
2102 sdata = vif_to_sdata(vif);
2103 local = sdata->local;
2104
2105 if (WARN_ON(!local->resuming))
2106 return;
2107
2108 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2109 return;
2110
2111 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2112
2113 mutex_lock(&local->key_mtx);
2114 list_for_each_entry(key, &sdata->key_list, list)
2115 key->flags |= KEY_FLAG_TAINTED;
2116 mutex_unlock(&local->key_mtx);
2117 }
2118 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2119
2120 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2121 {
2122 struct ieee80211_local *local = sdata->local;
2123 struct ieee80211_chanctx_conf *chanctx_conf;
2124 struct ieee80211_chanctx *chanctx;
2125
2126 mutex_lock(&local->chanctx_mtx);
2127
2128 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2129 lockdep_is_held(&local->chanctx_mtx));
2130
2131 if (WARN_ON_ONCE(!chanctx_conf))
2132 goto unlock;
2133
2134 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2135 ieee80211_recalc_smps_chanctx(local, chanctx);
2136 unlock:
2137 mutex_unlock(&local->chanctx_mtx);
2138 }
2139
2140 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2141 {
2142 struct ieee80211_local *local = sdata->local;
2143 struct ieee80211_chanctx_conf *chanctx_conf;
2144 struct ieee80211_chanctx *chanctx;
2145
2146 mutex_lock(&local->chanctx_mtx);
2147
2148 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2149 lockdep_is_held(&local->chanctx_mtx));
2150
2151 if (WARN_ON_ONCE(!chanctx_conf))
2152 goto unlock;
2153
2154 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2155 ieee80211_recalc_chanctx_min_def(local, chanctx);
2156 unlock:
2157 mutex_unlock(&local->chanctx_mtx);
2158 }
2159
2160 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2161 {
2162 int i;
2163
2164 for (i = 0; i < n_ids; i++)
2165 if (ids[i] == id)
2166 return true;
2167 return false;
2168 }
2169
2170 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2171 const u8 *ids, int n_ids,
2172 const u8 *after_ric, int n_after_ric,
2173 size_t offset)
2174 {
2175 size_t pos = offset;
2176
2177 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2178 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2179 pos += 2 + ies[pos + 1];
2180
2181 while (pos < ielen &&
2182 !ieee80211_id_in_list(after_ric, n_after_ric,
2183 ies[pos]))
2184 pos += 2 + ies[pos + 1];
2185 } else {
2186 pos += 2 + ies[pos + 1];
2187 }
2188 }
2189
2190 return pos;
2191 }
2192
2193 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2194 const u8 *ids, int n_ids, size_t offset)
2195 {
2196 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2197 }
2198 EXPORT_SYMBOL(ieee80211_ie_split);
2199
2200 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2201 {
2202 size_t pos = offset;
2203
2204 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2205 pos += 2 + ies[pos + 1];
2206
2207 return pos;
2208 }
2209
2210 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2211 int rssi_min_thold,
2212 int rssi_max_thold)
2213 {
2214 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2215
2216 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2217 return;
2218
2219 /*
2220 * Scale up threshold values before storing it, as the RSSI averaging
2221 * algorithm uses a scaled up value as well. Change this scaling
2222 * factor if the RSSI averaging algorithm changes.
2223 */
2224 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2225 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2226 }
2227
2228 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2229 int rssi_min_thold,
2230 int rssi_max_thold)
2231 {
2232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2233
2234 WARN_ON(rssi_min_thold == rssi_max_thold ||
2235 rssi_min_thold > rssi_max_thold);
2236
2237 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2238 rssi_max_thold);
2239 }
2240 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2241
2242 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2243 {
2244 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2245
2246 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2247 }
2248 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2249
2250 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2251 u16 cap)
2252 {
2253 __le16 tmp;
2254
2255 *pos++ = WLAN_EID_HT_CAPABILITY;
2256 *pos++ = sizeof(struct ieee80211_ht_cap);
2257 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2258
2259 /* capability flags */
2260 tmp = cpu_to_le16(cap);
2261 memcpy(pos, &tmp, sizeof(u16));
2262 pos += sizeof(u16);
2263
2264 /* AMPDU parameters */
2265 *pos++ = ht_cap->ampdu_factor |
2266 (ht_cap->ampdu_density <<
2267 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2268
2269 /* MCS set */
2270 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2271 pos += sizeof(ht_cap->mcs);
2272
2273 /* extended capabilities */
2274 pos += sizeof(__le16);
2275
2276 /* BF capabilities */
2277 pos += sizeof(__le32);
2278
2279 /* antenna selection */
2280 pos += sizeof(u8);
2281
2282 return pos;
2283 }
2284
2285 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2286 u32 cap)
2287 {
2288 __le32 tmp;
2289
2290 *pos++ = WLAN_EID_VHT_CAPABILITY;
2291 *pos++ = sizeof(struct ieee80211_vht_cap);
2292 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2293
2294 /* capability flags */
2295 tmp = cpu_to_le32(cap);
2296 memcpy(pos, &tmp, sizeof(u32));
2297 pos += sizeof(u32);
2298
2299 /* VHT MCS set */
2300 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2301 pos += sizeof(vht_cap->vht_mcs);
2302
2303 return pos;
2304 }
2305
2306 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2307 const struct cfg80211_chan_def *chandef,
2308 u16 prot_mode)
2309 {
2310 struct ieee80211_ht_operation *ht_oper;
2311 /* Build HT Information */
2312 *pos++ = WLAN_EID_HT_OPERATION;
2313 *pos++ = sizeof(struct ieee80211_ht_operation);
2314 ht_oper = (struct ieee80211_ht_operation *)pos;
2315 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2316 chandef->chan->center_freq);
2317 switch (chandef->width) {
2318 case NL80211_CHAN_WIDTH_160:
2319 case NL80211_CHAN_WIDTH_80P80:
2320 case NL80211_CHAN_WIDTH_80:
2321 case NL80211_CHAN_WIDTH_40:
2322 if (chandef->center_freq1 > chandef->chan->center_freq)
2323 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2324 else
2325 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2326 break;
2327 default:
2328 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2329 break;
2330 }
2331 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2332 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2333 chandef->width != NL80211_CHAN_WIDTH_20)
2334 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2335
2336 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2337 ht_oper->stbc_param = 0x0000;
2338
2339 /* It seems that Basic MCS set and Supported MCS set
2340 are identical for the first 10 bytes */
2341 memset(&ht_oper->basic_set, 0, 16);
2342 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2343
2344 return pos + sizeof(struct ieee80211_ht_operation);
2345 }
2346
2347 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2348 const struct ieee80211_ht_operation *ht_oper,
2349 struct cfg80211_chan_def *chandef)
2350 {
2351 enum nl80211_channel_type channel_type;
2352
2353 if (!ht_oper) {
2354 cfg80211_chandef_create(chandef, control_chan,
2355 NL80211_CHAN_NO_HT);
2356 return;
2357 }
2358
2359 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2360 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2361 channel_type = NL80211_CHAN_HT20;
2362 break;
2363 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2364 channel_type = NL80211_CHAN_HT40PLUS;
2365 break;
2366 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2367 channel_type = NL80211_CHAN_HT40MINUS;
2368 break;
2369 default:
2370 channel_type = NL80211_CHAN_NO_HT;
2371 }
2372
2373 cfg80211_chandef_create(chandef, control_chan, channel_type);
2374 }
2375
2376 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2377 const struct ieee80211_supported_band *sband,
2378 const u8 *srates, int srates_len, u32 *rates)
2379 {
2380 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2381 int shift = ieee80211_chandef_get_shift(chandef);
2382 struct ieee80211_rate *br;
2383 int brate, rate, i, j, count = 0;
2384
2385 *rates = 0;
2386
2387 for (i = 0; i < srates_len; i++) {
2388 rate = srates[i] & 0x7f;
2389
2390 for (j = 0; j < sband->n_bitrates; j++) {
2391 br = &sband->bitrates[j];
2392 if ((rate_flags & br->flags) != rate_flags)
2393 continue;
2394
2395 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2396 if (brate == rate) {
2397 *rates |= BIT(j);
2398 count++;
2399 break;
2400 }
2401 }
2402 }
2403 return count;
2404 }
2405
2406 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2407 struct sk_buff *skb, bool need_basic,
2408 enum ieee80211_band band)
2409 {
2410 struct ieee80211_local *local = sdata->local;
2411 struct ieee80211_supported_band *sband;
2412 int rate, shift;
2413 u8 i, rates, *pos;
2414 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2415 u32 rate_flags;
2416
2417 shift = ieee80211_vif_get_shift(&sdata->vif);
2418 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2419 sband = local->hw.wiphy->bands[band];
2420 rates = 0;
2421 for (i = 0; i < sband->n_bitrates; i++) {
2422 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2423 continue;
2424 rates++;
2425 }
2426 if (rates > 8)
2427 rates = 8;
2428
2429 if (skb_tailroom(skb) < rates + 2)
2430 return -ENOMEM;
2431
2432 pos = skb_put(skb, rates + 2);
2433 *pos++ = WLAN_EID_SUPP_RATES;
2434 *pos++ = rates;
2435 for (i = 0; i < rates; i++) {
2436 u8 basic = 0;
2437 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2438 continue;
2439
2440 if (need_basic && basic_rates & BIT(i))
2441 basic = 0x80;
2442 rate = sband->bitrates[i].bitrate;
2443 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2444 5 * (1 << shift));
2445 *pos++ = basic | (u8) rate;
2446 }
2447
2448 return 0;
2449 }
2450
2451 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2452 struct sk_buff *skb, bool need_basic,
2453 enum ieee80211_band band)
2454 {
2455 struct ieee80211_local *local = sdata->local;
2456 struct ieee80211_supported_band *sband;
2457 int rate, shift;
2458 u8 i, exrates, *pos;
2459 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2460 u32 rate_flags;
2461
2462 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2463 shift = ieee80211_vif_get_shift(&sdata->vif);
2464
2465 sband = local->hw.wiphy->bands[band];
2466 exrates = 0;
2467 for (i = 0; i < sband->n_bitrates; i++) {
2468 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2469 continue;
2470 exrates++;
2471 }
2472
2473 if (exrates > 8)
2474 exrates -= 8;
2475 else
2476 exrates = 0;
2477
2478 if (skb_tailroom(skb) < exrates + 2)
2479 return -ENOMEM;
2480
2481 if (exrates) {
2482 pos = skb_put(skb, exrates + 2);
2483 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2484 *pos++ = exrates;
2485 for (i = 8; i < sband->n_bitrates; i++) {
2486 u8 basic = 0;
2487 if ((rate_flags & sband->bitrates[i].flags)
2488 != rate_flags)
2489 continue;
2490 if (need_basic && basic_rates & BIT(i))
2491 basic = 0x80;
2492 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2493 5 * (1 << shift));
2494 *pos++ = basic | (u8) rate;
2495 }
2496 }
2497 return 0;
2498 }
2499
2500 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2501 {
2502 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2504
2505 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2506 /* non-managed type inferfaces */
2507 return 0;
2508 }
2509 return ifmgd->ave_beacon_signal / 16;
2510 }
2511 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2512
2513 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2514 {
2515 if (!mcs)
2516 return 1;
2517
2518 /* TODO: consider rx_highest */
2519
2520 if (mcs->rx_mask[3])
2521 return 4;
2522 if (mcs->rx_mask[2])
2523 return 3;
2524 if (mcs->rx_mask[1])
2525 return 2;
2526 return 1;
2527 }
2528
2529 /**
2530 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2531 * @local: mac80211 hw info struct
2532 * @status: RX status
2533 * @mpdu_len: total MPDU length (including FCS)
2534 * @mpdu_offset: offset into MPDU to calculate timestamp at
2535 *
2536 * This function calculates the RX timestamp at the given MPDU offset, taking
2537 * into account what the RX timestamp was. An offset of 0 will just normalize
2538 * the timestamp to TSF at beginning of MPDU reception.
2539 */
2540 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2541 struct ieee80211_rx_status *status,
2542 unsigned int mpdu_len,
2543 unsigned int mpdu_offset)
2544 {
2545 u64 ts = status->mactime;
2546 struct rate_info ri;
2547 u16 rate;
2548
2549 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2550 return 0;
2551
2552 memset(&ri, 0, sizeof(ri));
2553
2554 /* Fill cfg80211 rate info */
2555 if (status->flag & RX_FLAG_HT) {
2556 ri.mcs = status->rate_idx;
2557 ri.flags |= RATE_INFO_FLAGS_MCS;
2558 if (status->flag & RX_FLAG_40MHZ)
2559 ri.bw = RATE_INFO_BW_40;
2560 else
2561 ri.bw = RATE_INFO_BW_20;
2562 if (status->flag & RX_FLAG_SHORT_GI)
2563 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2564 } else if (status->flag & RX_FLAG_VHT) {
2565 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2566 ri.mcs = status->rate_idx;
2567 ri.nss = status->vht_nss;
2568 if (status->flag & RX_FLAG_40MHZ)
2569 ri.bw = RATE_INFO_BW_40;
2570 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2571 ri.bw = RATE_INFO_BW_80;
2572 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2573 ri.bw = RATE_INFO_BW_160;
2574 else
2575 ri.bw = RATE_INFO_BW_20;
2576 if (status->flag & RX_FLAG_SHORT_GI)
2577 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2578 } else {
2579 struct ieee80211_supported_band *sband;
2580 int shift = 0;
2581 int bitrate;
2582
2583 if (status->flag & RX_FLAG_10MHZ) {
2584 shift = 1;
2585 ri.bw = RATE_INFO_BW_10;
2586 } else if (status->flag & RX_FLAG_5MHZ) {
2587 shift = 2;
2588 ri.bw = RATE_INFO_BW_5;
2589 } else {
2590 ri.bw = RATE_INFO_BW_20;
2591 }
2592
2593 sband = local->hw.wiphy->bands[status->band];
2594 bitrate = sband->bitrates[status->rate_idx].bitrate;
2595 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2596 }
2597
2598 rate = cfg80211_calculate_bitrate(&ri);
2599 if (WARN_ONCE(!rate,
2600 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2601 status->flag, status->rate_idx, status->vht_nss))
2602 return 0;
2603
2604 /* rewind from end of MPDU */
2605 if (status->flag & RX_FLAG_MACTIME_END)
2606 ts -= mpdu_len * 8 * 10 / rate;
2607
2608 ts += mpdu_offset * 8 * 10 / rate;
2609
2610 return ts;
2611 }
2612
2613 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2614 {
2615 struct ieee80211_sub_if_data *sdata;
2616 struct cfg80211_chan_def chandef;
2617
2618 mutex_lock(&local->mtx);
2619 mutex_lock(&local->iflist_mtx);
2620 list_for_each_entry(sdata, &local->interfaces, list) {
2621 /* it might be waiting for the local->mtx, but then
2622 * by the time it gets it, sdata->wdev.cac_started
2623 * will no longer be true
2624 */
2625 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2626
2627 if (sdata->wdev.cac_started) {
2628 chandef = sdata->vif.bss_conf.chandef;
2629 ieee80211_vif_release_channel(sdata);
2630 cfg80211_cac_event(sdata->dev,
2631 &chandef,
2632 NL80211_RADAR_CAC_ABORTED,
2633 GFP_KERNEL);
2634 }
2635 }
2636 mutex_unlock(&local->iflist_mtx);
2637 mutex_unlock(&local->mtx);
2638 }
2639
2640 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2641 {
2642 struct ieee80211_local *local =
2643 container_of(work, struct ieee80211_local, radar_detected_work);
2644 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2645 struct ieee80211_chanctx *ctx;
2646 int num_chanctx = 0;
2647
2648 mutex_lock(&local->chanctx_mtx);
2649 list_for_each_entry(ctx, &local->chanctx_list, list) {
2650 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2651 continue;
2652
2653 num_chanctx++;
2654 chandef = ctx->conf.def;
2655 }
2656 mutex_unlock(&local->chanctx_mtx);
2657
2658 ieee80211_dfs_cac_cancel(local);
2659
2660 if (num_chanctx > 1)
2661 /* XXX: multi-channel is not supported yet */
2662 WARN_ON(1);
2663 else
2664 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2665 }
2666
2667 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2668 {
2669 struct ieee80211_local *local = hw_to_local(hw);
2670
2671 trace_api_radar_detected(local);
2672
2673 ieee80211_queue_work(hw, &local->radar_detected_work);
2674 }
2675 EXPORT_SYMBOL(ieee80211_radar_detected);
2676
2677 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2678 {
2679 u32 ret;
2680 int tmp;
2681
2682 switch (c->width) {
2683 case NL80211_CHAN_WIDTH_20:
2684 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2685 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2686 break;
2687 case NL80211_CHAN_WIDTH_40:
2688 c->width = NL80211_CHAN_WIDTH_20;
2689 c->center_freq1 = c->chan->center_freq;
2690 ret = IEEE80211_STA_DISABLE_40MHZ |
2691 IEEE80211_STA_DISABLE_VHT;
2692 break;
2693 case NL80211_CHAN_WIDTH_80:
2694 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2695 /* n_P40 */
2696 tmp /= 2;
2697 /* freq_P40 */
2698 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2699 c->width = NL80211_CHAN_WIDTH_40;
2700 ret = IEEE80211_STA_DISABLE_VHT;
2701 break;
2702 case NL80211_CHAN_WIDTH_80P80:
2703 c->center_freq2 = 0;
2704 c->width = NL80211_CHAN_WIDTH_80;
2705 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2706 IEEE80211_STA_DISABLE_160MHZ;
2707 break;
2708 case NL80211_CHAN_WIDTH_160:
2709 /* n_P20 */
2710 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2711 /* n_P80 */
2712 tmp /= 4;
2713 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2714 c->width = NL80211_CHAN_WIDTH_80;
2715 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2716 IEEE80211_STA_DISABLE_160MHZ;
2717 break;
2718 default:
2719 case NL80211_CHAN_WIDTH_20_NOHT:
2720 WARN_ON_ONCE(1);
2721 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2722 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2723 break;
2724 case NL80211_CHAN_WIDTH_5:
2725 case NL80211_CHAN_WIDTH_10:
2726 WARN_ON_ONCE(1);
2727 /* keep c->width */
2728 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2729 break;
2730 }
2731
2732 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2733
2734 return ret;
2735 }
2736
2737 /*
2738 * Returns true if smps_mode_new is strictly more restrictive than
2739 * smps_mode_old.
2740 */
2741 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2742 enum ieee80211_smps_mode smps_mode_new)
2743 {
2744 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2745 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2746 return false;
2747
2748 switch (smps_mode_old) {
2749 case IEEE80211_SMPS_STATIC:
2750 return false;
2751 case IEEE80211_SMPS_DYNAMIC:
2752 return smps_mode_new == IEEE80211_SMPS_STATIC;
2753 case IEEE80211_SMPS_OFF:
2754 return smps_mode_new != IEEE80211_SMPS_OFF;
2755 default:
2756 WARN_ON(1);
2757 }
2758
2759 return false;
2760 }
2761
2762 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2763 struct cfg80211_csa_settings *csa_settings)
2764 {
2765 struct sk_buff *skb;
2766 struct ieee80211_mgmt *mgmt;
2767 struct ieee80211_local *local = sdata->local;
2768 int freq;
2769 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2770 sizeof(mgmt->u.action.u.chan_switch);
2771 u8 *pos;
2772
2773 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2774 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2775 return -EOPNOTSUPP;
2776
2777 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2778 5 + /* channel switch announcement element */
2779 3 + /* secondary channel offset element */
2780 8); /* mesh channel switch parameters element */
2781 if (!skb)
2782 return -ENOMEM;
2783
2784 skb_reserve(skb, local->tx_headroom);
2785 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2786 memset(mgmt, 0, hdr_len);
2787 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2788 IEEE80211_STYPE_ACTION);
2789
2790 eth_broadcast_addr(mgmt->da);
2791 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2792 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2793 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2794 } else {
2795 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2796 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2797 }
2798 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2799 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2800 pos = skb_put(skb, 5);
2801 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2802 *pos++ = 3; /* IE length */
2803 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2804 freq = csa_settings->chandef.chan->center_freq;
2805 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2806 *pos++ = csa_settings->count; /* count */
2807
2808 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2809 enum nl80211_channel_type ch_type;
2810
2811 skb_put(skb, 3);
2812 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2813 *pos++ = 1; /* IE length */
2814 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2815 if (ch_type == NL80211_CHAN_HT40PLUS)
2816 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2817 else
2818 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2819 }
2820
2821 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2822 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2823
2824 skb_put(skb, 8);
2825 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2826 *pos++ = 6; /* IE length */
2827 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2828 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2829 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2830 *pos++ |= csa_settings->block_tx ?
2831 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2832 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2833 pos += 2;
2834 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2835 pos += 2;
2836 }
2837
2838 ieee80211_tx_skb(sdata, skb);
2839 return 0;
2840 }
2841
2842 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2843 {
2844 return !(cs == NULL || cs->cipher == 0 ||
2845 cs->hdr_len < cs->pn_len + cs->pn_off ||
2846 cs->hdr_len <= cs->key_idx_off ||
2847 cs->key_idx_shift > 7 ||
2848 cs->key_idx_mask == 0);
2849 }
2850
2851 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2852 {
2853 int i;
2854
2855 /* Ensure we have enough iftype bitmap space for all iftype values */
2856 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2857
2858 for (i = 0; i < n; i++)
2859 if (!ieee80211_cs_valid(&cs[i]))
2860 return false;
2861
2862 return true;
2863 }
2864
2865 const struct ieee80211_cipher_scheme *
2866 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2867 enum nl80211_iftype iftype)
2868 {
2869 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2870 int n = local->hw.n_cipher_schemes;
2871 int i;
2872 const struct ieee80211_cipher_scheme *cs = NULL;
2873
2874 for (i = 0; i < n; i++) {
2875 if (l[i].cipher == cipher) {
2876 cs = &l[i];
2877 break;
2878 }
2879 }
2880
2881 if (!cs || !(cs->iftype & BIT(iftype)))
2882 return NULL;
2883
2884 return cs;
2885 }
2886
2887 int ieee80211_cs_headroom(struct ieee80211_local *local,
2888 struct cfg80211_crypto_settings *crypto,
2889 enum nl80211_iftype iftype)
2890 {
2891 const struct ieee80211_cipher_scheme *cs;
2892 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2893 int i;
2894
2895 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2896 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2897 iftype);
2898
2899 if (cs && headroom < cs->hdr_len)
2900 headroom = cs->hdr_len;
2901 }
2902
2903 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2904 if (cs && headroom < cs->hdr_len)
2905 headroom = cs->hdr_len;
2906
2907 return headroom;
2908 }
2909
2910 static bool
2911 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2912 {
2913 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2914 int skip;
2915
2916 if (end > 0)
2917 return false;
2918
2919 /* End time is in the past, check for repetitions */
2920 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2921 if (data->count[i] < 255) {
2922 if (data->count[i] <= skip) {
2923 data->count[i] = 0;
2924 return false;
2925 }
2926
2927 data->count[i] -= skip;
2928 }
2929
2930 data->desc[i].start += skip * data->desc[i].interval;
2931
2932 return true;
2933 }
2934
2935 static bool
2936 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2937 s32 *offset)
2938 {
2939 bool ret = false;
2940 int i;
2941
2942 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2943 s32 cur;
2944
2945 if (!data->count[i])
2946 continue;
2947
2948 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2949 ret = true;
2950
2951 cur = data->desc[i].start - tsf;
2952 if (cur > *offset)
2953 continue;
2954
2955 cur = data->desc[i].start + data->desc[i].duration - tsf;
2956 if (cur > *offset)
2957 *offset = cur;
2958 }
2959
2960 return ret;
2961 }
2962
2963 static u32
2964 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2965 {
2966 s32 offset = 0;
2967 int tries = 0;
2968 /*
2969 * arbitrary limit, used to avoid infinite loops when combined NoA
2970 * descriptors cover the full time period.
2971 */
2972 int max_tries = 5;
2973
2974 ieee80211_extend_absent_time(data, tsf, &offset);
2975 do {
2976 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2977 break;
2978
2979 tries++;
2980 } while (tries < max_tries);
2981
2982 return offset;
2983 }
2984
2985 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2986 {
2987 u32 next_offset = BIT(31) - 1;
2988 int i;
2989
2990 data->absent = 0;
2991 data->has_next_tsf = false;
2992 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2993 s32 start;
2994
2995 if (!data->count[i])
2996 continue;
2997
2998 ieee80211_extend_noa_desc(data, tsf, i);
2999 start = data->desc[i].start - tsf;
3000 if (start <= 0)
3001 data->absent |= BIT(i);
3002
3003 if (next_offset > start)
3004 next_offset = start;
3005
3006 data->has_next_tsf = true;
3007 }
3008
3009 if (data->absent)
3010 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3011
3012 data->next_tsf = tsf + next_offset;
3013 }
3014 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3015
3016 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3017 struct ieee80211_noa_data *data, u32 tsf)
3018 {
3019 int ret = 0;
3020 int i;
3021
3022 memset(data, 0, sizeof(*data));
3023
3024 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3025 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3026
3027 if (!desc->count || !desc->duration)
3028 continue;
3029
3030 data->count[i] = desc->count;
3031 data->desc[i].start = le32_to_cpu(desc->start_time);
3032 data->desc[i].duration = le32_to_cpu(desc->duration);
3033 data->desc[i].interval = le32_to_cpu(desc->interval);
3034
3035 if (data->count[i] > 1 &&
3036 data->desc[i].interval < data->desc[i].duration)
3037 continue;
3038
3039 ieee80211_extend_noa_desc(data, tsf, i);
3040 ret++;
3041 }
3042
3043 if (ret)
3044 ieee80211_update_p2p_noa(data, tsf);
3045
3046 return ret;
3047 }
3048 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3049
3050 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3051 struct ieee80211_sub_if_data *sdata)
3052 {
3053 u64 tsf = drv_get_tsf(local, sdata);
3054 u64 dtim_count = 0;
3055 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3056 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3057 struct ps_data *ps;
3058 u8 bcns_from_dtim;
3059
3060 if (tsf == -1ULL || !beacon_int || !dtim_period)
3061 return;
3062
3063 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3064 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3065 if (!sdata->bss)
3066 return;
3067
3068 ps = &sdata->bss->ps;
3069 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3070 ps = &sdata->u.mesh.ps;
3071 } else {
3072 return;
3073 }
3074
3075 /*
3076 * actually finds last dtim_count, mac80211 will update in
3077 * __beacon_add_tim().
3078 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3079 */
3080 do_div(tsf, beacon_int);
3081 bcns_from_dtim = do_div(tsf, dtim_period);
3082 /* just had a DTIM */
3083 if (!bcns_from_dtim)
3084 dtim_count = 0;
3085 else
3086 dtim_count = dtim_period - bcns_from_dtim;
3087
3088 ps->dtim_count = dtim_count;
3089 }
3090
3091 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3092 struct ieee80211_chanctx *ctx)
3093 {
3094 struct ieee80211_sub_if_data *sdata;
3095 u8 radar_detect = 0;
3096
3097 lockdep_assert_held(&local->chanctx_mtx);
3098
3099 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3100 return 0;
3101
3102 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3103 if (sdata->reserved_radar_required)
3104 radar_detect |= BIT(sdata->reserved_chandef.width);
3105
3106 /*
3107 * An in-place reservation context should not have any assigned vifs
3108 * until it replaces the other context.
3109 */
3110 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3111 !list_empty(&ctx->assigned_vifs));
3112
3113 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3114 if (sdata->radar_required)
3115 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3116
3117 return radar_detect;
3118 }
3119
3120 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3121 const struct cfg80211_chan_def *chandef,
3122 enum ieee80211_chanctx_mode chanmode,
3123 u8 radar_detect)
3124 {
3125 struct ieee80211_local *local = sdata->local;
3126 struct ieee80211_sub_if_data *sdata_iter;
3127 enum nl80211_iftype iftype = sdata->wdev.iftype;
3128 int num[NUM_NL80211_IFTYPES];
3129 struct ieee80211_chanctx *ctx;
3130 int num_different_channels = 0;
3131 int total = 1;
3132
3133 lockdep_assert_held(&local->chanctx_mtx);
3134
3135 if (WARN_ON(hweight32(radar_detect) > 1))
3136 return -EINVAL;
3137
3138 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3139 !chandef->chan))
3140 return -EINVAL;
3141
3142 if (chandef)
3143 num_different_channels = 1;
3144
3145 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3146 return -EINVAL;
3147
3148 /* Always allow software iftypes */
3149 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3150 if (radar_detect)
3151 return -EINVAL;
3152 return 0;
3153 }
3154
3155 memset(num, 0, sizeof(num));
3156
3157 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3158 num[iftype] = 1;
3159
3160 list_for_each_entry(ctx, &local->chanctx_list, list) {
3161 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3162 continue;
3163 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3164 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3165 num_different_channels++;
3166 continue;
3167 }
3168 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3169 cfg80211_chandef_compatible(chandef,
3170 &ctx->conf.def))
3171 continue;
3172 num_different_channels++;
3173 }
3174
3175 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3176 struct wireless_dev *wdev_iter;
3177
3178 wdev_iter = &sdata_iter->wdev;
3179
3180 if (sdata_iter == sdata ||
3181 !ieee80211_sdata_running(sdata_iter) ||
3182 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3183 continue;
3184
3185 num[wdev_iter->iftype]++;
3186 total++;
3187 }
3188
3189 if (total == 1 && !radar_detect)
3190 return 0;
3191
3192 return cfg80211_check_combinations(local->hw.wiphy,
3193 num_different_channels,
3194 radar_detect, num);
3195 }
3196
3197 static void
3198 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3199 void *data)
3200 {
3201 u32 *max_num_different_channels = data;
3202
3203 *max_num_different_channels = max(*max_num_different_channels,
3204 c->num_different_channels);
3205 }
3206
3207 int ieee80211_max_num_channels(struct ieee80211_local *local)
3208 {
3209 struct ieee80211_sub_if_data *sdata;
3210 int num[NUM_NL80211_IFTYPES] = {};
3211 struct ieee80211_chanctx *ctx;
3212 int num_different_channels = 0;
3213 u8 radar_detect = 0;
3214 u32 max_num_different_channels = 1;
3215 int err;
3216
3217 lockdep_assert_held(&local->chanctx_mtx);
3218
3219 list_for_each_entry(ctx, &local->chanctx_list, list) {
3220 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3221 continue;
3222
3223 num_different_channels++;
3224
3225 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3226 }
3227
3228 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3229 num[sdata->wdev.iftype]++;
3230
3231 err = cfg80211_iter_combinations(local->hw.wiphy,
3232 num_different_channels, radar_detect,
3233 num, ieee80211_iter_max_chans,
3234 &max_num_different_channels);
3235 if (err < 0)
3236 return err;
3237
3238 return max_num_different_channels;
3239 }
3240
3241 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3242 {
3243 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3244 *buf++ = 7; /* len */
3245 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3246 *buf++ = 0x50;
3247 *buf++ = 0xf2;
3248 *buf++ = 2; /* WME */
3249 *buf++ = 0; /* WME info */
3250 *buf++ = 1; /* WME ver */
3251 *buf++ = qosinfo; /* U-APSD no in use */
3252
3253 return buf;
3254 }
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