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Linux 5.1.15
[linux/fpc-iii.git] / net / mac80211 / util.c
blob447a55ae9df1750d934a771cea65936721d49127
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2019 Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * utilities for mac80211
15 */
16
17 #include <net/mac80211.h>
18 #include <linux/netdevice.h>
19 #include <linux/export.h>
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/bitmap.h>
26 #include <linux/crc32.h>
27 #include <net/net_namespace.h>
28 #include <net/cfg80211.h>
29 #include <net/rtnetlink.h>
30
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
33 #include "rate.h"
34 #include "mesh.h"
35 #include "wme.h"
36 #include "led.h"
37 #include "wep.h"
38
39 /* privid for wiphys to determine whether they belong to us or not */
40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41
42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43 {
44 struct ieee80211_local *local;
45 BUG_ON(!wiphy);
46
47 local = wiphy_priv(wiphy);
48 return &local->hw;
49 }
50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51
52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
53 {
54 struct sk_buff *skb;
55 struct ieee80211_hdr *hdr;
56
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
60 }
61 }
62
63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
65 int shift)
66 {
67 int dur;
68
69 /* calculate duration (in microseconds, rounded up to next higher
70 * integer if it includes a fractional microsecond) to send frame of
71 * len bytes (does not include FCS) at the given rate. Duration will
72 * also include SIFS.
73 *
74 * rate is in 100 kbps, so divident is multiplied by 10 in the
75 * DIV_ROUND_UP() operations.
76 *
77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
78 * is assumed to be 0 otherwise.
79 */
80
81 if (band == NL80211_BAND_5GHZ || erp) {
82 /*
83 * OFDM:
84 *
85 * N_DBPS = DATARATE x 4
86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
87 * (16 = SIGNAL time, 6 = tail bits)
88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
89 *
90 * T_SYM = 4 usec
91 * 802.11a - 18.5.2: aSIFSTime = 16 usec
92 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
93 * signal ext = 6 usec
94 */
95 dur = 16; /* SIFS + signal ext */
96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98
99 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 4 for 5 MHz
101 * * times 2 for 10 MHz
102 */
103 dur *= 1 << shift;
104
105 /* rates should already consider the channel bandwidth,
106 * don't apply divisor again.
107 */
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate); /* T_SYM x N_SYM */
110 } else {
111 /*
112 * 802.11b or 802.11g with 802.11b compatibility:
113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 *
116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117 * aSIFSTime = 10 usec
118 * aPreambleLength = 144 usec or 72 usec with short preamble
119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 */
121 dur = 10; /* aSIFSTime = 10 usec */
122 dur += short_preamble ? (72 + 24) : (144 + 48);
123
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
125 }
126
127 return dur;
128 }
129
130 /* Exported duration function for driver use */
131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
134 size_t frame_len,
135 struct ieee80211_rate *rate)
136 {
137 struct ieee80211_sub_if_data *sdata;
138 u16 dur;
139 int erp, shift = 0;
140 bool short_preamble = false;
141
142 erp = 0;
143 if (vif) {
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
149 }
150
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
153
154 return cpu_to_le16(dur);
155 }
156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157
158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
161 {
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
165 bool short_preamble;
166 int erp, shift = 0, bitrate;
167 u16 dur;
168 struct ieee80211_supported_band *sband;
169
170 sband = local->hw.wiphy->bands[frame_txctl->band];
171
172 short_preamble = false;
173
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
175
176 erp = 0;
177 if (vif) {
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
183 }
184
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
186
187 /* CTS duration */
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190 /* Data frame duration */
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
193 /* ACK duration */
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
196
197 return cpu_to_le16(dur);
198 }
199 EXPORT_SYMBOL(ieee80211_rts_duration);
200
201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
203 size_t frame_len,
204 const struct ieee80211_tx_info *frame_txctl)
205 {
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
209 bool short_preamble;
210 int erp, shift = 0, bitrate;
211 u16 dur;
212 struct ieee80211_supported_band *sband;
213
214 sband = local->hw.wiphy->bands[frame_txctl->band];
215
216 short_preamble = false;
217
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
219 erp = 0;
220 if (vif) {
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
226 }
227
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229
230 /* Data frame duration */
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234 /* ACK duration */
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 }
238
239 return cpu_to_le16(dur);
240 }
241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242
243 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
244 {
245 struct ieee80211_local *local = sdata->local;
246 struct ieee80211_vif *vif = &sdata->vif;
247 struct fq *fq = &local->fq;
248 struct ps_data *ps = NULL;
249 struct txq_info *txqi;
250 struct sta_info *sta;
251 int i;
252
253 spin_lock_bh(&fq->lock);
254
255 if (sdata->vif.type == NL80211_IFTYPE_AP)
256 ps = &sdata->bss->ps;
257
258 sdata->vif.txqs_stopped[ac] = false;
259
260 list_for_each_entry_rcu(sta, &local->sta_list, list) {
261 if (sdata != sta->sdata)
262 continue;
263
264 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
265 struct ieee80211_txq *txq = sta->sta.txq[i];
266
267 if (!txq)
268 continue;
269
270 txqi = to_txq_info(txq);
271
272 if (ac != txq->ac)
273 continue;
274
275 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
276 &txqi->flags))
277 continue;
278
279 spin_unlock_bh(&fq->lock);
280 drv_wake_tx_queue(local, txqi);
281 spin_lock_bh(&fq->lock);
282 }
283 }
284
285 if (!vif->txq)
286 goto out;
287
288 txqi = to_txq_info(vif->txq);
289
290 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
291 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
292 goto out;
293
294 spin_unlock_bh(&fq->lock);
295
296 drv_wake_tx_queue(local, txqi);
297 return;
298 out:
299 spin_unlock_bh(&fq->lock);
300 }
301
302 static void
303 __releases(&local->queue_stop_reason_lock)
304 __acquires(&local->queue_stop_reason_lock)
305 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
306 {
307 struct ieee80211_sub_if_data *sdata;
308 int n_acs = IEEE80211_NUM_ACS;
309 int i;
310
311 rcu_read_lock();
312
313 if (local->hw.queues < IEEE80211_NUM_ACS)
314 n_acs = 1;
315
316 for (i = 0; i < local->hw.queues; i++) {
317 if (local->queue_stop_reasons[i])
318 continue;
319
320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
321 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
322 int ac;
323
324 for (ac = 0; ac < n_acs; ac++) {
325 int ac_queue = sdata->vif.hw_queue[ac];
326
327 if (ac_queue == i ||
328 sdata->vif.cab_queue == i)
329 __ieee80211_wake_txqs(sdata, ac);
330 }
331 }
332 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
333 }
334
335 rcu_read_unlock();
336 }
337
338 void ieee80211_wake_txqs(unsigned long data)
339 {
340 struct ieee80211_local *local = (struct ieee80211_local *)data;
341 unsigned long flags;
342
343 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
344 _ieee80211_wake_txqs(local, &flags);
345 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
346 }
347
348 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
349 {
350 struct ieee80211_sub_if_data *sdata;
351 int n_acs = IEEE80211_NUM_ACS;
352
353 if (local->ops->wake_tx_queue)
354 return;
355
356 if (local->hw.queues < IEEE80211_NUM_ACS)
357 n_acs = 1;
358
359 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
360 int ac;
361
362 if (!sdata->dev)
363 continue;
364
365 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
366 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
367 continue;
368
369 for (ac = 0; ac < n_acs; ac++) {
370 int ac_queue = sdata->vif.hw_queue[ac];
371
372 if (ac_queue == queue ||
373 (sdata->vif.cab_queue == queue &&
374 local->queue_stop_reasons[ac_queue] == 0 &&
375 skb_queue_empty(&local->pending[ac_queue])))
376 netif_wake_subqueue(sdata->dev, ac);
377 }
378 }
379 }
380
381 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
382 enum queue_stop_reason reason,
383 bool refcounted,
384 unsigned long *flags)
385 {
386 struct ieee80211_local *local = hw_to_local(hw);
387
388 trace_wake_queue(local, queue, reason);
389
390 if (WARN_ON(queue >= hw->queues))
391 return;
392
393 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
394 return;
395
396 if (!refcounted) {
397 local->q_stop_reasons[queue][reason] = 0;
398 } else {
399 local->q_stop_reasons[queue][reason]--;
400 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
401 local->q_stop_reasons[queue][reason] = 0;
402 }
403
404 if (local->q_stop_reasons[queue][reason] == 0)
405 __clear_bit(reason, &local->queue_stop_reasons[queue]);
406
407 if (local->queue_stop_reasons[queue] != 0)
408 /* someone still has this queue stopped */
409 return;
410
411 if (skb_queue_empty(&local->pending[queue])) {
412 rcu_read_lock();
413 ieee80211_propagate_queue_wake(local, queue);
414 rcu_read_unlock();
415 } else
416 tasklet_schedule(&local->tx_pending_tasklet);
417
418 /*
419 * Calling _ieee80211_wake_txqs here can be a problem because it may
420 * release queue_stop_reason_lock which has been taken by
421 * __ieee80211_wake_queue's caller. It is certainly not very nice to
422 * release someone's lock, but it is fine because all the callers of
423 * __ieee80211_wake_queue call it right before releasing the lock.
424 */
425 if (local->ops->wake_tx_queue) {
426 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
427 tasklet_schedule(&local->wake_txqs_tasklet);
428 else
429 _ieee80211_wake_txqs(local, flags);
430 }
431 }
432
433 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
434 enum queue_stop_reason reason,
435 bool refcounted)
436 {
437 struct ieee80211_local *local = hw_to_local(hw);
438 unsigned long flags;
439
440 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
441 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
442 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
443 }
444
445 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
446 {
447 ieee80211_wake_queue_by_reason(hw, queue,
448 IEEE80211_QUEUE_STOP_REASON_DRIVER,
449 false);
450 }
451 EXPORT_SYMBOL(ieee80211_wake_queue);
452
453 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
454 enum queue_stop_reason reason,
455 bool refcounted)
456 {
457 struct ieee80211_local *local = hw_to_local(hw);
458 struct ieee80211_sub_if_data *sdata;
459 int n_acs = IEEE80211_NUM_ACS;
460
461 trace_stop_queue(local, queue, reason);
462
463 if (WARN_ON(queue >= hw->queues))
464 return;
465
466 if (!refcounted)
467 local->q_stop_reasons[queue][reason] = 1;
468 else
469 local->q_stop_reasons[queue][reason]++;
470
471 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
472 return;
473
474 if (local->hw.queues < IEEE80211_NUM_ACS)
475 n_acs = 1;
476
477 rcu_read_lock();
478 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
479 int ac;
480
481 if (!sdata->dev)
482 continue;
483
484 for (ac = 0; ac < n_acs; ac++) {
485 if (sdata->vif.hw_queue[ac] == queue ||
486 sdata->vif.cab_queue == queue) {
487 if (!local->ops->wake_tx_queue) {
488 netif_stop_subqueue(sdata->dev, ac);
489 continue;
490 }
491 spin_lock(&local->fq.lock);
492 sdata->vif.txqs_stopped[ac] = true;
493 spin_unlock(&local->fq.lock);
494 }
495 }
496 }
497 rcu_read_unlock();
498 }
499
500 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
501 enum queue_stop_reason reason,
502 bool refcounted)
503 {
504 struct ieee80211_local *local = hw_to_local(hw);
505 unsigned long flags;
506
507 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
508 __ieee80211_stop_queue(hw, queue, reason, refcounted);
509 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
510 }
511
512 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
513 {
514 ieee80211_stop_queue_by_reason(hw, queue,
515 IEEE80211_QUEUE_STOP_REASON_DRIVER,
516 false);
517 }
518 EXPORT_SYMBOL(ieee80211_stop_queue);
519
520 void ieee80211_add_pending_skb(struct ieee80211_local *local,
521 struct sk_buff *skb)
522 {
523 struct ieee80211_hw *hw = &local->hw;
524 unsigned long flags;
525 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
526 int queue = info->hw_queue;
527
528 if (WARN_ON(!info->control.vif)) {
529 ieee80211_free_txskb(&local->hw, skb);
530 return;
531 }
532
533 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
534 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
535 false);
536 __skb_queue_tail(&local->pending[queue], skb);
537 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
538 false, &flags);
539 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
540 }
541
542 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
543 struct sk_buff_head *skbs)
544 {
545 struct ieee80211_hw *hw = &local->hw;
546 struct sk_buff *skb;
547 unsigned long flags;
548 int queue, i;
549
550 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
551 while ((skb = skb_dequeue(skbs))) {
552 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
553
554 if (WARN_ON(!info->control.vif)) {
555 ieee80211_free_txskb(&local->hw, skb);
556 continue;
557 }
558
559 queue = info->hw_queue;
560
561 __ieee80211_stop_queue(hw, queue,
562 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
563 false);
564
565 __skb_queue_tail(&local->pending[queue], skb);
566 }
567
568 for (i = 0; i < hw->queues; i++)
569 __ieee80211_wake_queue(hw, i,
570 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
571 false, &flags);
572 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
573 }
574
575 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
576 unsigned long queues,
577 enum queue_stop_reason reason,
578 bool refcounted)
579 {
580 struct ieee80211_local *local = hw_to_local(hw);
581 unsigned long flags;
582 int i;
583
584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
585
586 for_each_set_bit(i, &queues, hw->queues)
587 __ieee80211_stop_queue(hw, i, reason, refcounted);
588
589 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
590 }
591
592 void ieee80211_stop_queues(struct ieee80211_hw *hw)
593 {
594 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
595 IEEE80211_QUEUE_STOP_REASON_DRIVER,
596 false);
597 }
598 EXPORT_SYMBOL(ieee80211_stop_queues);
599
600 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
601 {
602 struct ieee80211_local *local = hw_to_local(hw);
603 unsigned long flags;
604 int ret;
605
606 if (WARN_ON(queue >= hw->queues))
607 return true;
608
609 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
610 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
611 &local->queue_stop_reasons[queue]);
612 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
613 return ret;
614 }
615 EXPORT_SYMBOL(ieee80211_queue_stopped);
616
617 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
618 unsigned long queues,
619 enum queue_stop_reason reason,
620 bool refcounted)
621 {
622 struct ieee80211_local *local = hw_to_local(hw);
623 unsigned long flags;
624 int i;
625
626 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
627
628 for_each_set_bit(i, &queues, hw->queues)
629 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
630
631 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
632 }
633
634 void ieee80211_wake_queues(struct ieee80211_hw *hw)
635 {
636 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
637 IEEE80211_QUEUE_STOP_REASON_DRIVER,
638 false);
639 }
640 EXPORT_SYMBOL(ieee80211_wake_queues);
641
642 static unsigned int
643 ieee80211_get_vif_queues(struct ieee80211_local *local,
644 struct ieee80211_sub_if_data *sdata)
645 {
646 unsigned int queues;
647
648 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
649 int ac;
650
651 queues = 0;
652
653 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
654 queues |= BIT(sdata->vif.hw_queue[ac]);
655 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
656 queues |= BIT(sdata->vif.cab_queue);
657 } else {
658 /* all queues */
659 queues = BIT(local->hw.queues) - 1;
660 }
661
662 return queues;
663 }
664
665 void __ieee80211_flush_queues(struct ieee80211_local *local,
666 struct ieee80211_sub_if_data *sdata,
667 unsigned int queues, bool drop)
668 {
669 if (!local->ops->flush)
670 return;
671
672 /*
673 * If no queue was set, or if the HW doesn't support
674 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
675 */
676 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
677 queues = ieee80211_get_vif_queues(local, sdata);
678
679 ieee80211_stop_queues_by_reason(&local->hw, queues,
680 IEEE80211_QUEUE_STOP_REASON_FLUSH,
681 false);
682
683 drv_flush(local, sdata, queues, drop);
684
685 ieee80211_wake_queues_by_reason(&local->hw, queues,
686 IEEE80211_QUEUE_STOP_REASON_FLUSH,
687 false);
688 }
689
690 void ieee80211_flush_queues(struct ieee80211_local *local,
691 struct ieee80211_sub_if_data *sdata, bool drop)
692 {
693 __ieee80211_flush_queues(local, sdata, 0, drop);
694 }
695
696 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
697 struct ieee80211_sub_if_data *sdata,
698 enum queue_stop_reason reason)
699 {
700 ieee80211_stop_queues_by_reason(&local->hw,
701 ieee80211_get_vif_queues(local, sdata),
702 reason, true);
703 }
704
705 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
706 struct ieee80211_sub_if_data *sdata,
707 enum queue_stop_reason reason)
708 {
709 ieee80211_wake_queues_by_reason(&local->hw,
710 ieee80211_get_vif_queues(local, sdata),
711 reason, true);
712 }
713
714 static void __iterate_interfaces(struct ieee80211_local *local,
715 u32 iter_flags,
716 void (*iterator)(void *data, u8 *mac,
717 struct ieee80211_vif *vif),
718 void *data)
719 {
720 struct ieee80211_sub_if_data *sdata;
721 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
722
723 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
724 switch (sdata->vif.type) {
725 case NL80211_IFTYPE_MONITOR:
726 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
727 continue;
728 break;
729 case NL80211_IFTYPE_AP_VLAN:
730 continue;
731 default:
732 break;
733 }
734 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
735 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
736 continue;
737 if (ieee80211_sdata_running(sdata) || !active_only)
738 iterator(data, sdata->vif.addr,
739 &sdata->vif);
740 }
741
742 sdata = rcu_dereference_check(local->monitor_sdata,
743 lockdep_is_held(&local->iflist_mtx) ||
744 lockdep_rtnl_is_held());
745 if (sdata &&
746 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
747 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
748 iterator(data, sdata->vif.addr, &sdata->vif);
749 }
750
751 void ieee80211_iterate_interfaces(
752 struct ieee80211_hw *hw, u32 iter_flags,
753 void (*iterator)(void *data, u8 *mac,
754 struct ieee80211_vif *vif),
755 void *data)
756 {
757 struct ieee80211_local *local = hw_to_local(hw);
758
759 mutex_lock(&local->iflist_mtx);
760 __iterate_interfaces(local, iter_flags, iterator, data);
761 mutex_unlock(&local->iflist_mtx);
762 }
763 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
764
765 void ieee80211_iterate_active_interfaces_atomic(
766 struct ieee80211_hw *hw, u32 iter_flags,
767 void (*iterator)(void *data, u8 *mac,
768 struct ieee80211_vif *vif),
769 void *data)
770 {
771 struct ieee80211_local *local = hw_to_local(hw);
772
773 rcu_read_lock();
774 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
775 iterator, data);
776 rcu_read_unlock();
777 }
778 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
779
780 void ieee80211_iterate_active_interfaces_rtnl(
781 struct ieee80211_hw *hw, u32 iter_flags,
782 void (*iterator)(void *data, u8 *mac,
783 struct ieee80211_vif *vif),
784 void *data)
785 {
786 struct ieee80211_local *local = hw_to_local(hw);
787
788 ASSERT_RTNL();
789
790 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
791 iterator, data);
792 }
793 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
794
795 static void __iterate_stations(struct ieee80211_local *local,
796 void (*iterator)(void *data,
797 struct ieee80211_sta *sta),
798 void *data)
799 {
800 struct sta_info *sta;
801
802 list_for_each_entry_rcu(sta, &local->sta_list, list) {
803 if (!sta->uploaded)
804 continue;
805
806 iterator(data, &sta->sta);
807 }
808 }
809
810 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
811 void (*iterator)(void *data,
812 struct ieee80211_sta *sta),
813 void *data)
814 {
815 struct ieee80211_local *local = hw_to_local(hw);
816
817 rcu_read_lock();
818 __iterate_stations(local, iterator, data);
819 rcu_read_unlock();
820 }
821 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
822
823 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
824 {
825 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
826
827 if (!ieee80211_sdata_running(sdata) ||
828 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
829 return NULL;
830 return &sdata->vif;
831 }
832 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
833
834 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
835 {
836 struct ieee80211_sub_if_data *sdata;
837
838 if (!vif)
839 return NULL;
840
841 sdata = vif_to_sdata(vif);
842
843 if (!ieee80211_sdata_running(sdata) ||
844 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
845 return NULL;
846
847 return &sdata->wdev;
848 }
849 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
850
851 /*
852 * Nothing should have been stuffed into the workqueue during
853 * the suspend->resume cycle. Since we can't check each caller
854 * of this function if we are already quiescing / suspended,
855 * check here and don't WARN since this can actually happen when
856 * the rx path (for example) is racing against __ieee80211_suspend
857 * and suspending / quiescing was set after the rx path checked
858 * them.
859 */
860 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
861 {
862 if (local->quiescing || (local->suspended && !local->resuming)) {
863 pr_warn("queueing ieee80211 work while going to suspend\n");
864 return false;
865 }
866
867 return true;
868 }
869
870 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
871 {
872 struct ieee80211_local *local = hw_to_local(hw);
873
874 if (!ieee80211_can_queue_work(local))
875 return;
876
877 queue_work(local->workqueue, work);
878 }
879 EXPORT_SYMBOL(ieee80211_queue_work);
880
881 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
882 struct delayed_work *dwork,
883 unsigned long delay)
884 {
885 struct ieee80211_local *local = hw_to_local(hw);
886
887 if (!ieee80211_can_queue_work(local))
888 return;
889
890 queue_delayed_work(local->workqueue, dwork, delay);
891 }
892 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
893
894 static u32
895 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
896 struct ieee802_11_elems *elems,
897 u64 filter, u32 crc, u8 *transmitter_bssid,
898 u8 *bss_bssid)
899 {
900 const struct element *elem, *sub;
901 bool calc_crc = filter != 0;
902 DECLARE_BITMAP(seen_elems, 256);
903 const u8 *ie;
904
905 bitmap_zero(seen_elems, 256);
906
907 for_each_element(elem, start, len) {
908 bool elem_parse_failed;
909 u8 id = elem->id;
910 u8 elen = elem->datalen;
911 const u8 *pos = elem->data;
912
913 switch (id) {
914 case WLAN_EID_SSID:
915 case WLAN_EID_SUPP_RATES:
916 case WLAN_EID_FH_PARAMS:
917 case WLAN_EID_DS_PARAMS:
918 case WLAN_EID_CF_PARAMS:
919 case WLAN_EID_TIM:
920 case WLAN_EID_IBSS_PARAMS:
921 case WLAN_EID_CHALLENGE:
922 case WLAN_EID_RSN:
923 case WLAN_EID_ERP_INFO:
924 case WLAN_EID_EXT_SUPP_RATES:
925 case WLAN_EID_HT_CAPABILITY:
926 case WLAN_EID_HT_OPERATION:
927 case WLAN_EID_VHT_CAPABILITY:
928 case WLAN_EID_VHT_OPERATION:
929 case WLAN_EID_MESH_ID:
930 case WLAN_EID_MESH_CONFIG:
931 case WLAN_EID_PEER_MGMT:
932 case WLAN_EID_PREQ:
933 case WLAN_EID_PREP:
934 case WLAN_EID_PERR:
935 case WLAN_EID_RANN:
936 case WLAN_EID_CHANNEL_SWITCH:
937 case WLAN_EID_EXT_CHANSWITCH_ANN:
938 case WLAN_EID_COUNTRY:
939 case WLAN_EID_PWR_CONSTRAINT:
940 case WLAN_EID_TIMEOUT_INTERVAL:
941 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
942 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
943 case WLAN_EID_CHAN_SWITCH_PARAM:
944 case WLAN_EID_EXT_CAPABILITY:
945 case WLAN_EID_CHAN_SWITCH_TIMING:
946 case WLAN_EID_LINK_ID:
947 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
948 /*
949 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
950 * that if the content gets bigger it might be needed more than once
951 */
952 if (test_bit(id, seen_elems)) {
953 elems->parse_error = true;
954 continue;
955 }
956 break;
957 }
958
959 if (calc_crc && id < 64 && (filter & (1ULL << id)))
960 crc = crc32_be(crc, pos - 2, elen + 2);
961
962 elem_parse_failed = false;
963
964 switch (id) {
965 case WLAN_EID_LINK_ID:
966 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
967 elem_parse_failed = true;
968 break;
969 }
970 elems->lnk_id = (void *)(pos - 2);
971 break;
972 case WLAN_EID_CHAN_SWITCH_TIMING:
973 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
974 elem_parse_failed = true;
975 break;
976 }
977 elems->ch_sw_timing = (void *)pos;
978 break;
979 case WLAN_EID_EXT_CAPABILITY:
980 elems->ext_capab = pos;
981 elems->ext_capab_len = elen;
982 break;
983 case WLAN_EID_SSID:
984 elems->ssid = pos;
985 elems->ssid_len = elen;
986 break;
987 case WLAN_EID_SUPP_RATES:
988 elems->supp_rates = pos;
989 elems->supp_rates_len = elen;
990 break;
991 case WLAN_EID_DS_PARAMS:
992 if (elen >= 1)
993 elems->ds_params = pos;
994 else
995 elem_parse_failed = true;
996 break;
997 case WLAN_EID_TIM:
998 if (elen >= sizeof(struct ieee80211_tim_ie)) {
999 elems->tim = (void *)pos;
1000 elems->tim_len = elen;
1001 } else
1002 elem_parse_failed = true;
1003 break;
1004 case WLAN_EID_CHALLENGE:
1005 elems->challenge = pos;
1006 elems->challenge_len = elen;
1007 break;
1008 case WLAN_EID_VENDOR_SPECIFIC:
1009 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1010 pos[2] == 0xf2) {
1011 /* Microsoft OUI (00:50:F2) */
1012
1013 if (calc_crc)
1014 crc = crc32_be(crc, pos - 2, elen + 2);
1015
1016 if (elen >= 5 && pos[3] == 2) {
1017 /* OUI Type 2 - WMM IE */
1018 if (pos[4] == 0) {
1019 elems->wmm_info = pos;
1020 elems->wmm_info_len = elen;
1021 } else if (pos[4] == 1) {
1022 elems->wmm_param = pos;
1023 elems->wmm_param_len = elen;
1024 }
1025 }
1026 }
1027 break;
1028 case WLAN_EID_RSN:
1029 elems->rsn = pos;
1030 elems->rsn_len = elen;
1031 break;
1032 case WLAN_EID_ERP_INFO:
1033 if (elen >= 1)
1034 elems->erp_info = pos;
1035 else
1036 elem_parse_failed = true;
1037 break;
1038 case WLAN_EID_EXT_SUPP_RATES:
1039 elems->ext_supp_rates = pos;
1040 elems->ext_supp_rates_len = elen;
1041 break;
1042 case WLAN_EID_HT_CAPABILITY:
1043 if (elen >= sizeof(struct ieee80211_ht_cap))
1044 elems->ht_cap_elem = (void *)pos;
1045 else
1046 elem_parse_failed = true;
1047 break;
1048 case WLAN_EID_HT_OPERATION:
1049 if (elen >= sizeof(struct ieee80211_ht_operation))
1050 elems->ht_operation = (void *)pos;
1051 else
1052 elem_parse_failed = true;
1053 break;
1054 case WLAN_EID_VHT_CAPABILITY:
1055 if (elen >= sizeof(struct ieee80211_vht_cap))
1056 elems->vht_cap_elem = (void *)pos;
1057 else
1058 elem_parse_failed = true;
1059 break;
1060 case WLAN_EID_VHT_OPERATION:
1061 if (elen >= sizeof(struct ieee80211_vht_operation))
1062 elems->vht_operation = (void *)pos;
1063 else
1064 elem_parse_failed = true;
1065 break;
1066 case WLAN_EID_OPMODE_NOTIF:
1067 if (elen > 0)
1068 elems->opmode_notif = pos;
1069 else
1070 elem_parse_failed = true;
1071 break;
1072 case WLAN_EID_MESH_ID:
1073 elems->mesh_id = pos;
1074 elems->mesh_id_len = elen;
1075 break;
1076 case WLAN_EID_MESH_CONFIG:
1077 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1078 elems->mesh_config = (void *)pos;
1079 else
1080 elem_parse_failed = true;
1081 break;
1082 case WLAN_EID_PEER_MGMT:
1083 elems->peering = pos;
1084 elems->peering_len = elen;
1085 break;
1086 case WLAN_EID_MESH_AWAKE_WINDOW:
1087 if (elen >= 2)
1088 elems->awake_window = (void *)pos;
1089 break;
1090 case WLAN_EID_PREQ:
1091 elems->preq = pos;
1092 elems->preq_len = elen;
1093 break;
1094 case WLAN_EID_PREP:
1095 elems->prep = pos;
1096 elems->prep_len = elen;
1097 break;
1098 case WLAN_EID_PERR:
1099 elems->perr = pos;
1100 elems->perr_len = elen;
1101 break;
1102 case WLAN_EID_RANN:
1103 if (elen >= sizeof(struct ieee80211_rann_ie))
1104 elems->rann = (void *)pos;
1105 else
1106 elem_parse_failed = true;
1107 break;
1108 case WLAN_EID_CHANNEL_SWITCH:
1109 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1110 elem_parse_failed = true;
1111 break;
1112 }
1113 elems->ch_switch_ie = (void *)pos;
1114 break;
1115 case WLAN_EID_EXT_CHANSWITCH_ANN:
1116 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1117 elem_parse_failed = true;
1118 break;
1119 }
1120 elems->ext_chansw_ie = (void *)pos;
1121 break;
1122 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1123 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1124 elem_parse_failed = true;
1125 break;
1126 }
1127 elems->sec_chan_offs = (void *)pos;
1128 break;
1129 case WLAN_EID_CHAN_SWITCH_PARAM:
1130 if (elen !=
1131 sizeof(*elems->mesh_chansw_params_ie)) {
1132 elem_parse_failed = true;
1133 break;
1134 }
1135 elems->mesh_chansw_params_ie = (void *)pos;
1136 break;
1137 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1138 if (!action ||
1139 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1140 elem_parse_failed = true;
1141 break;
1142 }
1143 elems->wide_bw_chansw_ie = (void *)pos;
1144 break;
1145 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1146 if (action) {
1147 elem_parse_failed = true;
1148 break;
1149 }
1150 /*
1151 * This is a bit tricky, but as we only care about
1152 * the wide bandwidth channel switch element, so
1153 * just parse it out manually.
1154 */
1155 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1156 pos, elen);
1157 if (ie) {
1158 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1159 elems->wide_bw_chansw_ie =
1160 (void *)(ie + 2);
1161 else
1162 elem_parse_failed = true;
1163 }
1164 break;
1165 case WLAN_EID_COUNTRY:
1166 elems->country_elem = pos;
1167 elems->country_elem_len = elen;
1168 break;
1169 case WLAN_EID_PWR_CONSTRAINT:
1170 if (elen != 1) {
1171 elem_parse_failed = true;
1172 break;
1173 }
1174 elems->pwr_constr_elem = pos;
1175 break;
1176 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1177 /* Lots of different options exist, but we only care
1178 * about the Dynamic Transmit Power Control element.
1179 * First check for the Cisco OUI, then for the DTPC
1180 * tag (0x00).
1181 */
1182 if (elen < 4) {
1183 elem_parse_failed = true;
1184 break;
1185 }
1186
1187 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1188 pos[2] != 0x96 || pos[3] != 0x00)
1189 break;
1190
1191 if (elen != 6) {
1192 elem_parse_failed = true;
1193 break;
1194 }
1195
1196 if (calc_crc)
1197 crc = crc32_be(crc, pos - 2, elen + 2);
1198
1199 elems->cisco_dtpc_elem = pos;
1200 break;
1201 case WLAN_EID_TIMEOUT_INTERVAL:
1202 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1203 elems->timeout_int = (void *)pos;
1204 else
1205 elem_parse_failed = true;
1206 break;
1207 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1208 if (elen >= sizeof(*elems->max_idle_period_ie))
1209 elems->max_idle_period_ie = (void *)pos;
1210 break;
1211 case WLAN_EID_MULTIPLE_BSSID:
1212 if (!bss_bssid || !transmitter_bssid || elen < 4)
1213 break;
1214
1215 elems->max_bssid_indicator = pos[0];
1216
1217 for_each_element(sub, pos + 1, elen - 1) {
1218 u8 sub_len = sub->datalen;
1219 u8 new_bssid[ETH_ALEN];
1220 const u8 *index;
1221
1222 /*
1223 * we only expect the "non-transmitted BSSID
1224 * profile" subelement (subelement id 0)
1225 */
1226 if (sub->id != 0 || sub->datalen < 4) {
1227 /* not a valid BSS profile */
1228 continue;
1229 }
1230
1231 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1232 sub->data[1] != 2) {
1233 /* The first element of the
1234 * Nontransmitted BSSID Profile is not
1235 * the Nontransmitted BSSID Capability
1236 * element.
1237 */
1238 continue;
1239 }
1240
1241 /* found a Nontransmitted BSSID Profile */
1242 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1243 sub->data, sub_len);
1244 if (!index || index[1] < 1 || index[2] == 0) {
1245 /* Invalid MBSSID Index element */
1246 continue;
1247 }
1248
1249 cfg80211_gen_new_bssid(transmitter_bssid,
1250 pos[0],
1251 index[2],
1252 new_bssid);
1253 if (ether_addr_equal(new_bssid, bss_bssid)) {
1254 elems->nontransmitted_bssid_profile =
1255 (void *)sub;
1256 elems->bssid_index_len = index[1];
1257 elems->bssid_index = (void *)&index[2];
1258 break;
1259 }
1260 }
1261 break;
1262 case WLAN_EID_EXTENSION:
1263 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1264 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1265 elems->mu_edca_param_set = (void *)&pos[1];
1266 if (calc_crc)
1267 crc = crc32_be(crc, pos - 2, elen + 2);
1268 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1269 elems->he_cap = (void *)&pos[1];
1270 elems->he_cap_len = elen - 1;
1271 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1272 elen >= sizeof(*elems->he_operation) &&
1273 elen >= ieee80211_he_oper_size(&pos[1])) {
1274 elems->he_operation = (void *)&pos[1];
1275 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1276 elems->uora_element = (void *)&pos[1];
1277 } else if (pos[0] ==
1278 WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1279 elen == 4) {
1280 elems->max_channel_switch_time = pos + 1;
1281 } else if (pos[0] ==
1282 WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1283 elen == 3) {
1284 elems->mbssid_config_ie = (void *)&pos[1];
1285 }
1286 break;
1287 default:
1288 break;
1289 }
1290
1291 if (elem_parse_failed)
1292 elems->parse_error = true;
1293 else
1294 __set_bit(id, seen_elems);
1295 }
1296
1297 if (!for_each_element_completed(elem, start, len))
1298 elems->parse_error = true;
1299
1300 return crc;
1301 }
1302
1303 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1304 struct ieee802_11_elems *elems,
1305 u64 filter, u32 crc, u8 *transmitter_bssid,
1306 u8 *bss_bssid)
1307 {
1308 memset(elems, 0, sizeof(*elems));
1309 elems->ie_start = start;
1310 elems->total_len = len;
1311
1312 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1313 crc, transmitter_bssid, bss_bssid);
1314
1315 /* Override with nontransmitted profile, if found */
1316 if (transmitter_bssid && elems->nontransmitted_bssid_profile) {
1317 const u8 *profile = elems->nontransmitted_bssid_profile;
1318
1319 _ieee802_11_parse_elems_crc(&profile[2], profile[1],
1320 action, elems, 0, 0,
1321 transmitter_bssid, bss_bssid);
1322 }
1323
1324 if (elems->tim && !elems->parse_error) {
1325 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1326
1327 elems->dtim_period = tim_ie->dtim_period;
1328 elems->dtim_count = tim_ie->dtim_count;
1329 }
1330
1331 /* Override DTIM period and count if needed */
1332 if (elems->bssid_index &&
1333 elems->bssid_index_len >=
1334 offsetofend(struct ieee80211_bssid_index, dtim_period))
1335 elems->dtim_period = elems->bssid_index->dtim_period;
1336
1337 if (elems->bssid_index &&
1338 elems->bssid_index_len >=
1339 offsetofend(struct ieee80211_bssid_index, dtim_count))
1340 elems->dtim_count = elems->bssid_index->dtim_count;
1341
1342 return crc;
1343 }
1344
1345 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1346 struct ieee80211_tx_queue_params
1347 *qparam, int ac)
1348 {
1349 struct ieee80211_chanctx_conf *chanctx_conf;
1350 const struct ieee80211_reg_rule *rrule;
1351 const struct ieee80211_wmm_ac *wmm_ac;
1352 u16 center_freq = 0;
1353
1354 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1355 sdata->vif.type != NL80211_IFTYPE_STATION)
1356 return;
1357
1358 rcu_read_lock();
1359 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1360 if (chanctx_conf)
1361 center_freq = chanctx_conf->def.chan->center_freq;
1362
1363 if (!center_freq) {
1364 rcu_read_unlock();
1365 return;
1366 }
1367
1368 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1369
1370 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1371 rcu_read_unlock();
1372 return;
1373 }
1374
1375 if (sdata->vif.type == NL80211_IFTYPE_AP)
1376 wmm_ac = &rrule->wmm_rule.ap[ac];
1377 else
1378 wmm_ac = &rrule->wmm_rule.client[ac];
1379 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1380 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1381 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1382 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1383 rcu_read_unlock();
1384 }
1385
1386 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1387 bool bss_notify, bool enable_qos)
1388 {
1389 struct ieee80211_local *local = sdata->local;
1390 struct ieee80211_tx_queue_params qparam;
1391 struct ieee80211_chanctx_conf *chanctx_conf;
1392 int ac;
1393 bool use_11b;
1394 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1395 int aCWmin, aCWmax;
1396
1397 if (!local->ops->conf_tx)
1398 return;
1399
1400 if (local->hw.queues < IEEE80211_NUM_ACS)
1401 return;
1402
1403 memset(&qparam, 0, sizeof(qparam));
1404
1405 rcu_read_lock();
1406 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1407 use_11b = (chanctx_conf &&
1408 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1409 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1410 rcu_read_unlock();
1411
1412 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1413
1414 /* Set defaults according to 802.11-2007 Table 7-37 */
1415 aCWmax = 1023;
1416 if (use_11b)
1417 aCWmin = 31;
1418 else
1419 aCWmin = 15;
1420
1421 /* Confiure old 802.11b/g medium access rules. */
1422 qparam.cw_max = aCWmax;
1423 qparam.cw_min = aCWmin;
1424 qparam.txop = 0;
1425 qparam.aifs = 2;
1426
1427 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1428 /* Update if QoS is enabled. */
1429 if (enable_qos) {
1430 switch (ac) {
1431 case IEEE80211_AC_BK:
1432 qparam.cw_max = aCWmax;
1433 qparam.cw_min = aCWmin;
1434 qparam.txop = 0;
1435 if (is_ocb)
1436 qparam.aifs = 9;
1437 else
1438 qparam.aifs = 7;
1439 break;
1440 /* never happens but let's not leave undefined */
1441 default:
1442 case IEEE80211_AC_BE:
1443 qparam.cw_max = aCWmax;
1444 qparam.cw_min = aCWmin;
1445 qparam.txop = 0;
1446 if (is_ocb)
1447 qparam.aifs = 6;
1448 else
1449 qparam.aifs = 3;
1450 break;
1451 case IEEE80211_AC_VI:
1452 qparam.cw_max = aCWmin;
1453 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1454 if (is_ocb)
1455 qparam.txop = 0;
1456 else if (use_11b)
1457 qparam.txop = 6016/32;
1458 else
1459 qparam.txop = 3008/32;
1460
1461 if (is_ocb)
1462 qparam.aifs = 3;
1463 else
1464 qparam.aifs = 2;
1465 break;
1466 case IEEE80211_AC_VO:
1467 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1468 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1469 if (is_ocb)
1470 qparam.txop = 0;
1471 else if (use_11b)
1472 qparam.txop = 3264/32;
1473 else
1474 qparam.txop = 1504/32;
1475 qparam.aifs = 2;
1476 break;
1477 }
1478 }
1479 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1480
1481 qparam.uapsd = false;
1482
1483 sdata->tx_conf[ac] = qparam;
1484 drv_conf_tx(local, sdata, ac, &qparam);
1485 }
1486
1487 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1488 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1489 sdata->vif.type != NL80211_IFTYPE_NAN) {
1490 sdata->vif.bss_conf.qos = enable_qos;
1491 if (bss_notify)
1492 ieee80211_bss_info_change_notify(sdata,
1493 BSS_CHANGED_QOS);
1494 }
1495 }
1496
1497 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1498 u16 transaction, u16 auth_alg, u16 status,
1499 const u8 *extra, size_t extra_len, const u8 *da,
1500 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1501 u32 tx_flags)
1502 {
1503 struct ieee80211_local *local = sdata->local;
1504 struct sk_buff *skb;
1505 struct ieee80211_mgmt *mgmt;
1506 int err;
1507
1508 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1509 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1510 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1511 if (!skb)
1512 return;
1513
1514 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1515
1516 mgmt = skb_put_zero(skb, 24 + 6);
1517 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1518 IEEE80211_STYPE_AUTH);
1519 memcpy(mgmt->da, da, ETH_ALEN);
1520 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1521 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1522 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1523 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1524 mgmt->u.auth.status_code = cpu_to_le16(status);
1525 if (extra)
1526 skb_put_data(skb, extra, extra_len);
1527
1528 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1529 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1530 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1531 WARN_ON(err);
1532 }
1533
1534 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1535 tx_flags;
1536 ieee80211_tx_skb(sdata, skb);
1537 }
1538
1539 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1540 const u8 *bssid, u16 stype, u16 reason,
1541 bool send_frame, u8 *frame_buf)
1542 {
1543 struct ieee80211_local *local = sdata->local;
1544 struct sk_buff *skb;
1545 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1546
1547 /* build frame */
1548 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1549 mgmt->duration = 0; /* initialize only */
1550 mgmt->seq_ctrl = 0; /* initialize only */
1551 memcpy(mgmt->da, bssid, ETH_ALEN);
1552 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1553 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1554 /* u.deauth.reason_code == u.disassoc.reason_code */
1555 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1556
1557 if (send_frame) {
1558 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1559 IEEE80211_DEAUTH_FRAME_LEN);
1560 if (!skb)
1561 return;
1562
1563 skb_reserve(skb, local->hw.extra_tx_headroom);
1564
1565 /* copy in frame */
1566 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1567
1568 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1569 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1570 IEEE80211_SKB_CB(skb)->flags |=
1571 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1572
1573 ieee80211_tx_skb(sdata, skb);
1574 }
1575 }
1576
1577 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1578 u8 *buffer, size_t buffer_len,
1579 const u8 *ie, size_t ie_len,
1580 enum nl80211_band band,
1581 u32 rate_mask,
1582 struct cfg80211_chan_def *chandef,
1583 size_t *offset, u32 flags)
1584 {
1585 struct ieee80211_supported_band *sband;
1586 const struct ieee80211_sta_he_cap *he_cap;
1587 u8 *pos = buffer, *end = buffer + buffer_len;
1588 size_t noffset;
1589 int supp_rates_len, i;
1590 u8 rates[32];
1591 int num_rates;
1592 int ext_rates_len;
1593 int shift;
1594 u32 rate_flags;
1595 bool have_80mhz = false;
1596
1597 *offset = 0;
1598
1599 sband = local->hw.wiphy->bands[band];
1600 if (WARN_ON_ONCE(!sband))
1601 return 0;
1602
1603 rate_flags = ieee80211_chandef_rate_flags(chandef);
1604 shift = ieee80211_chandef_get_shift(chandef);
1605
1606 num_rates = 0;
1607 for (i = 0; i < sband->n_bitrates; i++) {
1608 if ((BIT(i) & rate_mask) == 0)
1609 continue; /* skip rate */
1610 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1611 continue;
1612
1613 rates[num_rates++] =
1614 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1615 (1 << shift) * 5);
1616 }
1617
1618 supp_rates_len = min_t(int, num_rates, 8);
1619
1620 if (end - pos < 2 + supp_rates_len)
1621 goto out_err;
1622 *pos++ = WLAN_EID_SUPP_RATES;
1623 *pos++ = supp_rates_len;
1624 memcpy(pos, rates, supp_rates_len);
1625 pos += supp_rates_len;
1626
1627 /* insert "request information" if in custom IEs */
1628 if (ie && ie_len) {
1629 static const u8 before_extrates[] = {
1630 WLAN_EID_SSID,
1631 WLAN_EID_SUPP_RATES,
1632 WLAN_EID_REQUEST,
1633 };
1634 noffset = ieee80211_ie_split(ie, ie_len,
1635 before_extrates,
1636 ARRAY_SIZE(before_extrates),
1637 *offset);
1638 if (end - pos < noffset - *offset)
1639 goto out_err;
1640 memcpy(pos, ie + *offset, noffset - *offset);
1641 pos += noffset - *offset;
1642 *offset = noffset;
1643 }
1644
1645 ext_rates_len = num_rates - supp_rates_len;
1646 if (ext_rates_len > 0) {
1647 if (end - pos < 2 + ext_rates_len)
1648 goto out_err;
1649 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1650 *pos++ = ext_rates_len;
1651 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1652 pos += ext_rates_len;
1653 }
1654
1655 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1656 if (end - pos < 3)
1657 goto out_err;
1658 *pos++ = WLAN_EID_DS_PARAMS;
1659 *pos++ = 1;
1660 *pos++ = ieee80211_frequency_to_channel(
1661 chandef->chan->center_freq);
1662 }
1663
1664 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1665 goto done;
1666
1667 /* insert custom IEs that go before HT */
1668 if (ie && ie_len) {
1669 static const u8 before_ht[] = {
1670 /*
1671 * no need to list the ones split off already
1672 * (or generated here)
1673 */
1674 WLAN_EID_DS_PARAMS,
1675 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1676 };
1677 noffset = ieee80211_ie_split(ie, ie_len,
1678 before_ht, ARRAY_SIZE(before_ht),
1679 *offset);
1680 if (end - pos < noffset - *offset)
1681 goto out_err;
1682 memcpy(pos, ie + *offset, noffset - *offset);
1683 pos += noffset - *offset;
1684 *offset = noffset;
1685 }
1686
1687 if (sband->ht_cap.ht_supported) {
1688 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1689 goto out_err;
1690 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1691 sband->ht_cap.cap);
1692 }
1693
1694 /* insert custom IEs that go before VHT */
1695 if (ie && ie_len) {
1696 static const u8 before_vht[] = {
1697 /*
1698 * no need to list the ones split off already
1699 * (or generated here)
1700 */
1701 WLAN_EID_BSS_COEX_2040,
1702 WLAN_EID_EXT_CAPABILITY,
1703 WLAN_EID_SSID_LIST,
1704 WLAN_EID_CHANNEL_USAGE,
1705 WLAN_EID_INTERWORKING,
1706 WLAN_EID_MESH_ID,
1707 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1708 };
1709 noffset = ieee80211_ie_split(ie, ie_len,
1710 before_vht, ARRAY_SIZE(before_vht),
1711 *offset);
1712 if (end - pos < noffset - *offset)
1713 goto out_err;
1714 memcpy(pos, ie + *offset, noffset - *offset);
1715 pos += noffset - *offset;
1716 *offset = noffset;
1717 }
1718
1719 /* Check if any channel in this sband supports at least 80 MHz */
1720 for (i = 0; i < sband->n_channels; i++) {
1721 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1722 IEEE80211_CHAN_NO_80MHZ))
1723 continue;
1724
1725 have_80mhz = true;
1726 break;
1727 }
1728
1729 if (sband->vht_cap.vht_supported && have_80mhz) {
1730 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1731 goto out_err;
1732 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1733 sband->vht_cap.cap);
1734 }
1735
1736 /* insert custom IEs that go before HE */
1737 if (ie && ie_len) {
1738 static const u8 before_he[] = {
1739 /*
1740 * no need to list the ones split off before VHT
1741 * or generated here
1742 */
1743 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1744 WLAN_EID_AP_CSN,
1745 /* TODO: add 11ah/11aj/11ak elements */
1746 };
1747 noffset = ieee80211_ie_split(ie, ie_len,
1748 before_he, ARRAY_SIZE(before_he),
1749 *offset);
1750 if (end - pos < noffset - *offset)
1751 goto out_err;
1752 memcpy(pos, ie + *offset, noffset - *offset);
1753 pos += noffset - *offset;
1754 *offset = noffset;
1755 }
1756
1757 he_cap = ieee80211_get_he_sta_cap(sband);
1758 if (he_cap) {
1759 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1760 if (!pos)
1761 goto out_err;
1762 }
1763
1764 /*
1765 * If adding more here, adjust code in main.c
1766 * that calculates local->scan_ies_len.
1767 */
1768
1769 return pos - buffer;
1770 out_err:
1771 WARN_ONCE(1, "not enough space for preq IEs\n");
1772 done:
1773 return pos - buffer;
1774 }
1775
1776 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1777 size_t buffer_len,
1778 struct ieee80211_scan_ies *ie_desc,
1779 const u8 *ie, size_t ie_len,
1780 u8 bands_used, u32 *rate_masks,
1781 struct cfg80211_chan_def *chandef,
1782 u32 flags)
1783 {
1784 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1785 int i;
1786
1787 memset(ie_desc, 0, sizeof(*ie_desc));
1788
1789 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1790 if (bands_used & BIT(i)) {
1791 pos += ieee80211_build_preq_ies_band(local,
1792 buffer + pos,
1793 buffer_len - pos,
1794 ie, ie_len, i,
1795 rate_masks[i],
1796 chandef,
1797 &custom_ie_offset,
1798 flags);
1799 ie_desc->ies[i] = buffer + old_pos;
1800 ie_desc->len[i] = pos - old_pos;
1801 old_pos = pos;
1802 }
1803 }
1804
1805 /* add any remaining custom IEs */
1806 if (ie && ie_len) {
1807 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1808 "not enough space for preq custom IEs\n"))
1809 return pos;
1810 memcpy(buffer + pos, ie + custom_ie_offset,
1811 ie_len - custom_ie_offset);
1812 ie_desc->common_ies = buffer + pos;
1813 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1814 pos += ie_len - custom_ie_offset;
1815 }
1816
1817 return pos;
1818 };
1819
1820 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1821 const u8 *src, const u8 *dst,
1822 u32 ratemask,
1823 struct ieee80211_channel *chan,
1824 const u8 *ssid, size_t ssid_len,
1825 const u8 *ie, size_t ie_len,
1826 u32 flags)
1827 {
1828 struct ieee80211_local *local = sdata->local;
1829 struct cfg80211_chan_def chandef;
1830 struct sk_buff *skb;
1831 struct ieee80211_mgmt *mgmt;
1832 int ies_len;
1833 u32 rate_masks[NUM_NL80211_BANDS] = {};
1834 struct ieee80211_scan_ies dummy_ie_desc;
1835
1836 /*
1837 * Do not send DS Channel parameter for directed probe requests
1838 * in order to maximize the chance that we get a response. Some
1839 * badly-behaved APs don't respond when this parameter is included.
1840 */
1841 chandef.width = sdata->vif.bss_conf.chandef.width;
1842 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1843 chandef.chan = NULL;
1844 else
1845 chandef.chan = chan;
1846
1847 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1848 100 + ie_len);
1849 if (!skb)
1850 return NULL;
1851
1852 rate_masks[chan->band] = ratemask;
1853 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1854 skb_tailroom(skb), &dummy_ie_desc,
1855 ie, ie_len, BIT(chan->band),
1856 rate_masks, &chandef, flags);
1857 skb_put(skb, ies_len);
1858
1859 if (dst) {
1860 mgmt = (struct ieee80211_mgmt *) skb->data;
1861 memcpy(mgmt->da, dst, ETH_ALEN);
1862 memcpy(mgmt->bssid, dst, ETH_ALEN);
1863 }
1864
1865 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1866
1867 return skb;
1868 }
1869
1870 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1871 struct ieee802_11_elems *elems,
1872 enum nl80211_band band, u32 *basic_rates)
1873 {
1874 struct ieee80211_supported_band *sband;
1875 size_t num_rates;
1876 u32 supp_rates, rate_flags;
1877 int i, j, shift;
1878
1879 sband = sdata->local->hw.wiphy->bands[band];
1880 if (WARN_ON(!sband))
1881 return 1;
1882
1883 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1884 shift = ieee80211_vif_get_shift(&sdata->vif);
1885
1886 num_rates = sband->n_bitrates;
1887 supp_rates = 0;
1888 for (i = 0; i < elems->supp_rates_len +
1889 elems->ext_supp_rates_len; i++) {
1890 u8 rate = 0;
1891 int own_rate;
1892 bool is_basic;
1893 if (i < elems->supp_rates_len)
1894 rate = elems->supp_rates[i];
1895 else if (elems->ext_supp_rates)
1896 rate = elems->ext_supp_rates
1897 [i - elems->supp_rates_len];
1898 own_rate = 5 * (rate & 0x7f);
1899 is_basic = !!(rate & 0x80);
1900
1901 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1902 continue;
1903
1904 for (j = 0; j < num_rates; j++) {
1905 int brate;
1906 if ((rate_flags & sband->bitrates[j].flags)
1907 != rate_flags)
1908 continue;
1909
1910 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1911 1 << shift);
1912
1913 if (brate == own_rate) {
1914 supp_rates |= BIT(j);
1915 if (basic_rates && is_basic)
1916 *basic_rates |= BIT(j);
1917 }
1918 }
1919 }
1920 return supp_rates;
1921 }
1922
1923 void ieee80211_stop_device(struct ieee80211_local *local)
1924 {
1925 ieee80211_led_radio(local, false);
1926 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1927
1928 cancel_work_sync(&local->reconfig_filter);
1929
1930 flush_workqueue(local->workqueue);
1931 drv_stop(local);
1932 }
1933
1934 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1935 bool aborted)
1936 {
1937 /* It's possible that we don't handle the scan completion in
1938 * time during suspend, so if it's still marked as completed
1939 * here, queue the work and flush it to clean things up.
1940 * Instead of calling the worker function directly here, we
1941 * really queue it to avoid potential races with other flows
1942 * scheduling the same work.
1943 */
1944 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1945 /* If coming from reconfiguration failure, abort the scan so
1946 * we don't attempt to continue a partial HW scan - which is
1947 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1948 * completed scan, and a 5 GHz portion is still pending.
1949 */
1950 if (aborted)
1951 set_bit(SCAN_ABORTED, &local->scanning);
1952 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1953 flush_delayed_work(&local->scan_work);
1954 }
1955 }
1956
1957 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1958 {
1959 struct ieee80211_sub_if_data *sdata;
1960 struct ieee80211_chanctx *ctx;
1961
1962 /*
1963 * We get here if during resume the device can't be restarted properly.
1964 * We might also get here if this happens during HW reset, which is a
1965 * slightly different situation and we need to drop all connections in
1966 * the latter case.
1967 *
1968 * Ask cfg80211 to turn off all interfaces, this will result in more
1969 * warnings but at least we'll then get into a clean stopped state.
1970 */
1971
1972 local->resuming = false;
1973 local->suspended = false;
1974 local->in_reconfig = false;
1975
1976 ieee80211_flush_completed_scan(local, true);
1977
1978 /* scheduled scan clearly can't be running any more, but tell
1979 * cfg80211 and clear local state
1980 */
1981 ieee80211_sched_scan_end(local);
1982
1983 list_for_each_entry(sdata, &local->interfaces, list)
1984 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1985
1986 /* Mark channel contexts as not being in the driver any more to avoid
1987 * removing them from the driver during the shutdown process...
1988 */
1989 mutex_lock(&local->chanctx_mtx);
1990 list_for_each_entry(ctx, &local->chanctx_list, list)
1991 ctx->driver_present = false;
1992 mutex_unlock(&local->chanctx_mtx);
1993
1994 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1995 }
1996
1997 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1998 struct ieee80211_sub_if_data *sdata)
1999 {
2000 struct ieee80211_chanctx_conf *conf;
2001 struct ieee80211_chanctx *ctx;
2002
2003 if (!local->use_chanctx)
2004 return;
2005
2006 mutex_lock(&local->chanctx_mtx);
2007 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2008 lockdep_is_held(&local->chanctx_mtx));
2009 if (conf) {
2010 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2011 drv_assign_vif_chanctx(local, sdata, ctx);
2012 }
2013 mutex_unlock(&local->chanctx_mtx);
2014 }
2015
2016 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2017 {
2018 struct ieee80211_local *local = sdata->local;
2019 struct sta_info *sta;
2020
2021 /* add STAs back */
2022 mutex_lock(&local->sta_mtx);
2023 list_for_each_entry(sta, &local->sta_list, list) {
2024 enum ieee80211_sta_state state;
2025
2026 if (!sta->uploaded || sta->sdata != sdata)
2027 continue;
2028
2029 for (state = IEEE80211_STA_NOTEXIST;
2030 state < sta->sta_state; state++)
2031 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2032 state + 1));
2033 }
2034 mutex_unlock(&local->sta_mtx);
2035 }
2036
2037 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2038 {
2039 struct cfg80211_nan_func *func, **funcs;
2040 int res, id, i = 0;
2041
2042 res = drv_start_nan(sdata->local, sdata,
2043 &sdata->u.nan.conf);
2044 if (WARN_ON(res))
2045 return res;
2046
2047 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2048 sizeof(*funcs),
2049 GFP_KERNEL);
2050 if (!funcs)
2051 return -ENOMEM;
2052
2053 /* Add all the functions:
2054 * This is a little bit ugly. We need to call a potentially sleeping
2055 * callback for each NAN function, so we can't hold the spinlock.
2056 */
2057 spin_lock_bh(&sdata->u.nan.func_lock);
2058
2059 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2060 funcs[i++] = func;
2061
2062 spin_unlock_bh(&sdata->u.nan.func_lock);
2063
2064 for (i = 0; funcs[i]; i++) {
2065 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2066 if (WARN_ON(res))
2067 ieee80211_nan_func_terminated(&sdata->vif,
2068 funcs[i]->instance_id,
2069 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2070 GFP_KERNEL);
2071 }
2072
2073 kfree(funcs);
2074
2075 return 0;
2076 }
2077
2078 int ieee80211_reconfig(struct ieee80211_local *local)
2079 {
2080 struct ieee80211_hw *hw = &local->hw;
2081 struct ieee80211_sub_if_data *sdata;
2082 struct ieee80211_chanctx *ctx;
2083 struct sta_info *sta;
2084 int res, i;
2085 bool reconfig_due_to_wowlan = false;
2086 struct ieee80211_sub_if_data *sched_scan_sdata;
2087 struct cfg80211_sched_scan_request *sched_scan_req;
2088 bool sched_scan_stopped = false;
2089 bool suspended = local->suspended;
2090
2091 /* nothing to do if HW shouldn't run */
2092 if (!local->open_count)
2093 goto wake_up;
2094
2095 #ifdef CONFIG_PM
2096 if (suspended)
2097 local->resuming = true;
2098
2099 if (local->wowlan) {
2100 /*
2101 * In the wowlan case, both mac80211 and the device
2102 * are functional when the resume op is called, so
2103 * clear local->suspended so the device could operate
2104 * normally (e.g. pass rx frames).
2105 */
2106 local->suspended = false;
2107 res = drv_resume(local);
2108 local->wowlan = false;
2109 if (res < 0) {
2110 local->resuming = false;
2111 return res;
2112 }
2113 if (res == 0)
2114 goto wake_up;
2115 WARN_ON(res > 1);
2116 /*
2117 * res is 1, which means the driver requested
2118 * to go through a regular reset on wakeup.
2119 * restore local->suspended in this case.
2120 */
2121 reconfig_due_to_wowlan = true;
2122 local->suspended = true;
2123 }
2124 #endif
2125
2126 /*
2127 * In case of hw_restart during suspend (without wowlan),
2128 * cancel restart work, as we are reconfiguring the device
2129 * anyway.
2130 * Note that restart_work is scheduled on a frozen workqueue,
2131 * so we can't deadlock in this case.
2132 */
2133 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2134 cancel_work_sync(&local->restart_work);
2135
2136 local->started = false;
2137
2138 /*
2139 * Upon resume hardware can sometimes be goofy due to
2140 * various platform / driver / bus issues, so restarting
2141 * the device may at times not work immediately. Propagate
2142 * the error.
2143 */
2144 res = drv_start(local);
2145 if (res) {
2146 if (suspended)
2147 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2148 else
2149 WARN(1, "Hardware became unavailable during restart.\n");
2150 ieee80211_handle_reconfig_failure(local);
2151 return res;
2152 }
2153
2154 /* setup fragmentation threshold */
2155 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2156
2157 /* setup RTS threshold */
2158 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2159
2160 /* reset coverage class */
2161 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2162
2163 ieee80211_led_radio(local, true);
2164 ieee80211_mod_tpt_led_trig(local,
2165 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2166
2167 /* add interfaces */
2168 sdata = rtnl_dereference(local->monitor_sdata);
2169 if (sdata) {
2170 /* in HW restart it exists already */
2171 WARN_ON(local->resuming);
2172 res = drv_add_interface(local, sdata);
2173 if (WARN_ON(res)) {
2174 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2175 synchronize_net();
2176 kfree(sdata);
2177 }
2178 }
2179
2180 list_for_each_entry(sdata, &local->interfaces, list) {
2181 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2182 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2183 ieee80211_sdata_running(sdata)) {
2184 res = drv_add_interface(local, sdata);
2185 if (WARN_ON(res))
2186 break;
2187 }
2188 }
2189
2190 /* If adding any of the interfaces failed above, roll back and
2191 * report failure.
2192 */
2193 if (res) {
2194 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2195 list)
2196 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2197 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2198 ieee80211_sdata_running(sdata))
2199 drv_remove_interface(local, sdata);
2200 ieee80211_handle_reconfig_failure(local);
2201 return res;
2202 }
2203
2204 /* add channel contexts */
2205 if (local->use_chanctx) {
2206 mutex_lock(&local->chanctx_mtx);
2207 list_for_each_entry(ctx, &local->chanctx_list, list)
2208 if (ctx->replace_state !=
2209 IEEE80211_CHANCTX_REPLACES_OTHER)
2210 WARN_ON(drv_add_chanctx(local, ctx));
2211 mutex_unlock(&local->chanctx_mtx);
2212
2213 sdata = rtnl_dereference(local->monitor_sdata);
2214 if (sdata && ieee80211_sdata_running(sdata))
2215 ieee80211_assign_chanctx(local, sdata);
2216 }
2217
2218 /* reconfigure hardware */
2219 ieee80211_hw_config(local, ~0);
2220
2221 ieee80211_configure_filter(local);
2222
2223 /* Finally also reconfigure all the BSS information */
2224 list_for_each_entry(sdata, &local->interfaces, list) {
2225 u32 changed;
2226
2227 if (!ieee80211_sdata_running(sdata))
2228 continue;
2229
2230 ieee80211_assign_chanctx(local, sdata);
2231
2232 switch (sdata->vif.type) {
2233 case NL80211_IFTYPE_AP_VLAN:
2234 case NL80211_IFTYPE_MONITOR:
2235 break;
2236 case NL80211_IFTYPE_ADHOC:
2237 if (sdata->vif.bss_conf.ibss_joined)
2238 WARN_ON(drv_join_ibss(local, sdata));
2239 /* fall through */
2240 default:
2241 ieee80211_reconfig_stations(sdata);
2242 /* fall through */
2243 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2244 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2245 drv_conf_tx(local, sdata, i,
2246 &sdata->tx_conf[i]);
2247 break;
2248 }
2249
2250 /* common change flags for all interface types */
2251 changed = BSS_CHANGED_ERP_CTS_PROT |
2252 BSS_CHANGED_ERP_PREAMBLE |
2253 BSS_CHANGED_ERP_SLOT |
2254 BSS_CHANGED_HT |
2255 BSS_CHANGED_BASIC_RATES |
2256 BSS_CHANGED_BEACON_INT |
2257 BSS_CHANGED_BSSID |
2258 BSS_CHANGED_CQM |
2259 BSS_CHANGED_QOS |
2260 BSS_CHANGED_IDLE |
2261 BSS_CHANGED_TXPOWER |
2262 BSS_CHANGED_MCAST_RATE;
2263
2264 if (sdata->vif.mu_mimo_owner)
2265 changed |= BSS_CHANGED_MU_GROUPS;
2266
2267 switch (sdata->vif.type) {
2268 case NL80211_IFTYPE_STATION:
2269 changed |= BSS_CHANGED_ASSOC |
2270 BSS_CHANGED_ARP_FILTER |
2271 BSS_CHANGED_PS;
2272
2273 /* Re-send beacon info report to the driver */
2274 if (sdata->u.mgd.have_beacon)
2275 changed |= BSS_CHANGED_BEACON_INFO;
2276
2277 if (sdata->vif.bss_conf.max_idle_period ||
2278 sdata->vif.bss_conf.protected_keep_alive)
2279 changed |= BSS_CHANGED_KEEP_ALIVE;
2280
2281 sdata_lock(sdata);
2282 ieee80211_bss_info_change_notify(sdata, changed);
2283 sdata_unlock(sdata);
2284 break;
2285 case NL80211_IFTYPE_OCB:
2286 changed |= BSS_CHANGED_OCB;
2287 ieee80211_bss_info_change_notify(sdata, changed);
2288 break;
2289 case NL80211_IFTYPE_ADHOC:
2290 changed |= BSS_CHANGED_IBSS;
2291 /* fall through */
2292 case NL80211_IFTYPE_AP:
2293 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2294
2295 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2296 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2297 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2298 changed |= BSS_CHANGED_FTM_RESPONDER;
2299
2300 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2301 changed |= BSS_CHANGED_AP_PROBE_RESP;
2302
2303 if (rcu_access_pointer(sdata->u.ap.beacon))
2304 drv_start_ap(local, sdata);
2305 }
2306
2307 /* fall through */
2308 case NL80211_IFTYPE_MESH_POINT:
2309 if (sdata->vif.bss_conf.enable_beacon) {
2310 changed |= BSS_CHANGED_BEACON |
2311 BSS_CHANGED_BEACON_ENABLED;
2312 ieee80211_bss_info_change_notify(sdata, changed);
2313 }
2314 break;
2315 case NL80211_IFTYPE_NAN:
2316 res = ieee80211_reconfig_nan(sdata);
2317 if (res < 0) {
2318 ieee80211_handle_reconfig_failure(local);
2319 return res;
2320 }
2321 break;
2322 case NL80211_IFTYPE_WDS:
2323 case NL80211_IFTYPE_AP_VLAN:
2324 case NL80211_IFTYPE_MONITOR:
2325 case NL80211_IFTYPE_P2P_DEVICE:
2326 /* nothing to do */
2327 break;
2328 case NL80211_IFTYPE_UNSPECIFIED:
2329 case NUM_NL80211_IFTYPES:
2330 case NL80211_IFTYPE_P2P_CLIENT:
2331 case NL80211_IFTYPE_P2P_GO:
2332 WARN_ON(1);
2333 break;
2334 }
2335 }
2336
2337 ieee80211_recalc_ps(local);
2338
2339 /*
2340 * The sta might be in psm against the ap (e.g. because
2341 * this was the state before a hw restart), so we
2342 * explicitly send a null packet in order to make sure
2343 * it'll sync against the ap (and get out of psm).
2344 */
2345 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2346 list_for_each_entry(sdata, &local->interfaces, list) {
2347 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2348 continue;
2349 if (!sdata->u.mgd.associated)
2350 continue;
2351
2352 ieee80211_send_nullfunc(local, sdata, false);
2353 }
2354 }
2355
2356 /* APs are now beaconing, add back stations */
2357 mutex_lock(&local->sta_mtx);
2358 list_for_each_entry(sta, &local->sta_list, list) {
2359 enum ieee80211_sta_state state;
2360
2361 if (!sta->uploaded)
2362 continue;
2363
2364 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2365 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2366 continue;
2367
2368 for (state = IEEE80211_STA_NOTEXIST;
2369 state < sta->sta_state; state++)
2370 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2371 state + 1));
2372 }
2373 mutex_unlock(&local->sta_mtx);
2374
2375 /* add back keys */
2376 list_for_each_entry(sdata, &local->interfaces, list)
2377 ieee80211_reset_crypto_tx_tailroom(sdata);
2378
2379 list_for_each_entry(sdata, &local->interfaces, list)
2380 if (ieee80211_sdata_running(sdata))
2381 ieee80211_enable_keys(sdata);
2382
2383 /* Reconfigure sched scan if it was interrupted by FW restart */
2384 mutex_lock(&local->mtx);
2385 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2386 lockdep_is_held(&local->mtx));
2387 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2388 lockdep_is_held(&local->mtx));
2389 if (sched_scan_sdata && sched_scan_req)
2390 /*
2391 * Sched scan stopped, but we don't want to report it. Instead,
2392 * we're trying to reschedule. However, if more than one scan
2393 * plan was set, we cannot reschedule since we don't know which
2394 * scan plan was currently running (and some scan plans may have
2395 * already finished).
2396 */
2397 if (sched_scan_req->n_scan_plans > 1 ||
2398 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2399 sched_scan_req)) {
2400 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2401 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2402 sched_scan_stopped = true;
2403 }
2404 mutex_unlock(&local->mtx);
2405
2406 if (sched_scan_stopped)
2407 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2408
2409 wake_up:
2410
2411 if (local->monitors == local->open_count && local->monitors > 0)
2412 ieee80211_add_virtual_monitor(local);
2413
2414 /*
2415 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2416 * sessions can be established after a resume.
2417 *
2418 * Also tear down aggregation sessions since reconfiguring
2419 * them in a hardware restart scenario is not easily done
2420 * right now, and the hardware will have lost information
2421 * about the sessions, but we and the AP still think they
2422 * are active. This is really a workaround though.
2423 */
2424 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2425 mutex_lock(&local->sta_mtx);
2426
2427 list_for_each_entry(sta, &local->sta_list, list) {
2428 if (!local->resuming)
2429 ieee80211_sta_tear_down_BA_sessions(
2430 sta, AGG_STOP_LOCAL_REQUEST);
2431 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2432 }
2433
2434 mutex_unlock(&local->sta_mtx);
2435 }
2436
2437 if (local->in_reconfig) {
2438 local->in_reconfig = false;
2439 barrier();
2440
2441 /* Restart deferred ROCs */
2442 mutex_lock(&local->mtx);
2443 ieee80211_start_next_roc(local);
2444 mutex_unlock(&local->mtx);
2445 }
2446
2447 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2448 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2449 false);
2450
2451 /*
2452 * If this is for hw restart things are still running.
2453 * We may want to change that later, however.
2454 */
2455 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2456 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2457
2458 if (!suspended)
2459 return 0;
2460
2461 #ifdef CONFIG_PM
2462 /* first set suspended false, then resuming */
2463 local->suspended = false;
2464 mb();
2465 local->resuming = false;
2466
2467 ieee80211_flush_completed_scan(local, false);
2468
2469 if (local->open_count && !reconfig_due_to_wowlan)
2470 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2471
2472 list_for_each_entry(sdata, &local->interfaces, list) {
2473 if (!ieee80211_sdata_running(sdata))
2474 continue;
2475 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2476 ieee80211_sta_restart(sdata);
2477 }
2478
2479 mod_timer(&local->sta_cleanup, jiffies + 1);
2480 #else
2481 WARN_ON(1);
2482 #endif
2483
2484 return 0;
2485 }
2486
2487 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2488 {
2489 struct ieee80211_sub_if_data *sdata;
2490 struct ieee80211_local *local;
2491 struct ieee80211_key *key;
2492
2493 if (WARN_ON(!vif))
2494 return;
2495
2496 sdata = vif_to_sdata(vif);
2497 local = sdata->local;
2498
2499 if (WARN_ON(!local->resuming))
2500 return;
2501
2502 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2503 return;
2504
2505 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2506
2507 mutex_lock(&local->key_mtx);
2508 list_for_each_entry(key, &sdata->key_list, list)
2509 key->flags |= KEY_FLAG_TAINTED;
2510 mutex_unlock(&local->key_mtx);
2511 }
2512 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2513
2514 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2515 {
2516 struct ieee80211_local *local = sdata->local;
2517 struct ieee80211_chanctx_conf *chanctx_conf;
2518 struct ieee80211_chanctx *chanctx;
2519
2520 mutex_lock(&local->chanctx_mtx);
2521
2522 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2523 lockdep_is_held(&local->chanctx_mtx));
2524
2525 /*
2526 * This function can be called from a work, thus it may be possible
2527 * that the chanctx_conf is removed (due to a disconnection, for
2528 * example).
2529 * So nothing should be done in such case.
2530 */
2531 if (!chanctx_conf)
2532 goto unlock;
2533
2534 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2535 ieee80211_recalc_smps_chanctx(local, chanctx);
2536 unlock:
2537 mutex_unlock(&local->chanctx_mtx);
2538 }
2539
2540 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2541 {
2542 struct ieee80211_local *local = sdata->local;
2543 struct ieee80211_chanctx_conf *chanctx_conf;
2544 struct ieee80211_chanctx *chanctx;
2545
2546 mutex_lock(&local->chanctx_mtx);
2547
2548 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2549 lockdep_is_held(&local->chanctx_mtx));
2550
2551 if (WARN_ON_ONCE(!chanctx_conf))
2552 goto unlock;
2553
2554 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2555 ieee80211_recalc_chanctx_min_def(local, chanctx);
2556 unlock:
2557 mutex_unlock(&local->chanctx_mtx);
2558 }
2559
2560 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2561 {
2562 size_t pos = offset;
2563
2564 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2565 pos += 2 + ies[pos + 1];
2566
2567 return pos;
2568 }
2569
2570 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2571 int rssi_min_thold,
2572 int rssi_max_thold)
2573 {
2574 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2575
2576 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2577 return;
2578
2579 /*
2580 * Scale up threshold values before storing it, as the RSSI averaging
2581 * algorithm uses a scaled up value as well. Change this scaling
2582 * factor if the RSSI averaging algorithm changes.
2583 */
2584 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2585 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2586 }
2587
2588 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2589 int rssi_min_thold,
2590 int rssi_max_thold)
2591 {
2592 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2593
2594 WARN_ON(rssi_min_thold == rssi_max_thold ||
2595 rssi_min_thold > rssi_max_thold);
2596
2597 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2598 rssi_max_thold);
2599 }
2600 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2601
2602 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2603 {
2604 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2605
2606 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2607 }
2608 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2609
2610 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2611 u16 cap)
2612 {
2613 __le16 tmp;
2614
2615 *pos++ = WLAN_EID_HT_CAPABILITY;
2616 *pos++ = sizeof(struct ieee80211_ht_cap);
2617 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2618
2619 /* capability flags */
2620 tmp = cpu_to_le16(cap);
2621 memcpy(pos, &tmp, sizeof(u16));
2622 pos += sizeof(u16);
2623
2624 /* AMPDU parameters */
2625 *pos++ = ht_cap->ampdu_factor |
2626 (ht_cap->ampdu_density <<
2627 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2628
2629 /* MCS set */
2630 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2631 pos += sizeof(ht_cap->mcs);
2632
2633 /* extended capabilities */
2634 pos += sizeof(__le16);
2635
2636 /* BF capabilities */
2637 pos += sizeof(__le32);
2638
2639 /* antenna selection */
2640 pos += sizeof(u8);
2641
2642 return pos;
2643 }
2644
2645 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2646 u32 cap)
2647 {
2648 __le32 tmp;
2649
2650 *pos++ = WLAN_EID_VHT_CAPABILITY;
2651 *pos++ = sizeof(struct ieee80211_vht_cap);
2652 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2653
2654 /* capability flags */
2655 tmp = cpu_to_le32(cap);
2656 memcpy(pos, &tmp, sizeof(u32));
2657 pos += sizeof(u32);
2658
2659 /* VHT MCS set */
2660 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2661 pos += sizeof(vht_cap->vht_mcs);
2662
2663 return pos;
2664 }
2665
2666 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2667 const struct ieee80211_sta_he_cap *he_cap,
2668 u8 *end)
2669 {
2670 u8 n;
2671 u8 ie_len;
2672 u8 *orig_pos = pos;
2673
2674 /* Make sure we have place for the IE */
2675 /*
2676 * TODO: the 1 added is because this temporarily is under the EXTENSION
2677 * IE. Get rid of it when it moves.
2678 */
2679 if (!he_cap)
2680 return orig_pos;
2681
2682 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2683 ie_len = 2 + 1 +
2684 sizeof(he_cap->he_cap_elem) + n +
2685 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2686 he_cap->he_cap_elem.phy_cap_info);
2687
2688 if ((end - pos) < ie_len)
2689 return orig_pos;
2690
2691 *pos++ = WLAN_EID_EXTENSION;
2692 pos++; /* We'll set the size later below */
2693 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2694
2695 /* Fixed data */
2696 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2697 pos += sizeof(he_cap->he_cap_elem);
2698
2699 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2700 pos += n;
2701
2702 /* Check if PPE Threshold should be present */
2703 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2704 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2705 goto end;
2706
2707 /*
2708 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2709 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2710 */
2711 n = hweight8(he_cap->ppe_thres[0] &
2712 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2713 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2714 IEEE80211_PPE_THRES_NSS_POS));
2715
2716 /*
2717 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2718 * total size.
2719 */
2720 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2721 n = DIV_ROUND_UP(n, 8);
2722
2723 /* Copy PPE Thresholds */
2724 memcpy(pos, &he_cap->ppe_thres, n);
2725 pos += n;
2726
2727 end:
2728 orig_pos[1] = (pos - orig_pos) - 2;
2729 return pos;
2730 }
2731
2732 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2733 const struct cfg80211_chan_def *chandef,
2734 u16 prot_mode, bool rifs_mode)
2735 {
2736 struct ieee80211_ht_operation *ht_oper;
2737 /* Build HT Information */
2738 *pos++ = WLAN_EID_HT_OPERATION;
2739 *pos++ = sizeof(struct ieee80211_ht_operation);
2740 ht_oper = (struct ieee80211_ht_operation *)pos;
2741 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2742 chandef->chan->center_freq);
2743 switch (chandef->width) {
2744 case NL80211_CHAN_WIDTH_160:
2745 case NL80211_CHAN_WIDTH_80P80:
2746 case NL80211_CHAN_WIDTH_80:
2747 case NL80211_CHAN_WIDTH_40:
2748 if (chandef->center_freq1 > chandef->chan->center_freq)
2749 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2750 else
2751 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2752 break;
2753 default:
2754 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2755 break;
2756 }
2757 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2758 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2759 chandef->width != NL80211_CHAN_WIDTH_20)
2760 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2761
2762 if (rifs_mode)
2763 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2764
2765 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2766 ht_oper->stbc_param = 0x0000;
2767
2768 /* It seems that Basic MCS set and Supported MCS set
2769 are identical for the first 10 bytes */
2770 memset(&ht_oper->basic_set, 0, 16);
2771 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2772
2773 return pos + sizeof(struct ieee80211_ht_operation);
2774 }
2775
2776 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2777 const struct cfg80211_chan_def *chandef)
2778 {
2779 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2780 *pos++ = 3; /* IE length */
2781 /* New channel width */
2782 switch (chandef->width) {
2783 case NL80211_CHAN_WIDTH_80:
2784 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2785 break;
2786 case NL80211_CHAN_WIDTH_160:
2787 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2788 break;
2789 case NL80211_CHAN_WIDTH_80P80:
2790 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2791 break;
2792 default:
2793 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2794 }
2795
2796 /* new center frequency segment 0 */
2797 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2798 /* new center frequency segment 1 */
2799 if (chandef->center_freq2)
2800 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2801 else
2802 *pos++ = 0;
2803 }
2804
2805 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2806 const struct cfg80211_chan_def *chandef)
2807 {
2808 struct ieee80211_vht_operation *vht_oper;
2809
2810 *pos++ = WLAN_EID_VHT_OPERATION;
2811 *pos++ = sizeof(struct ieee80211_vht_operation);
2812 vht_oper = (struct ieee80211_vht_operation *)pos;
2813 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2814 chandef->center_freq1);
2815 if (chandef->center_freq2)
2816 vht_oper->center_freq_seg1_idx =
2817 ieee80211_frequency_to_channel(chandef->center_freq2);
2818 else
2819 vht_oper->center_freq_seg1_idx = 0x00;
2820
2821 switch (chandef->width) {
2822 case NL80211_CHAN_WIDTH_160:
2823 /*
2824 * Convert 160 MHz channel width to new style as interop
2825 * workaround.
2826 */
2827 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2828 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2829 if (chandef->chan->center_freq < chandef->center_freq1)
2830 vht_oper->center_freq_seg0_idx -= 8;
2831 else
2832 vht_oper->center_freq_seg0_idx += 8;
2833 break;
2834 case NL80211_CHAN_WIDTH_80P80:
2835 /*
2836 * Convert 80+80 MHz channel width to new style as interop
2837 * workaround.
2838 */
2839 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2840 break;
2841 case NL80211_CHAN_WIDTH_80:
2842 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2843 break;
2844 default:
2845 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2846 break;
2847 }
2848
2849 /* don't require special VHT peer rates */
2850 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2851
2852 return pos + sizeof(struct ieee80211_vht_operation);
2853 }
2854
2855 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2856 struct cfg80211_chan_def *chandef)
2857 {
2858 enum nl80211_channel_type channel_type;
2859
2860 if (!ht_oper)
2861 return false;
2862
2863 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2864 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2865 channel_type = NL80211_CHAN_HT20;
2866 break;
2867 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2868 channel_type = NL80211_CHAN_HT40PLUS;
2869 break;
2870 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2871 channel_type = NL80211_CHAN_HT40MINUS;
2872 break;
2873 default:
2874 channel_type = NL80211_CHAN_NO_HT;
2875 return false;
2876 }
2877
2878 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2879 return true;
2880 }
2881
2882 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2883 const struct ieee80211_vht_operation *oper,
2884 const struct ieee80211_ht_operation *htop,
2885 struct cfg80211_chan_def *chandef)
2886 {
2887 struct cfg80211_chan_def new = *chandef;
2888 int cf0, cf1;
2889 int ccfs0, ccfs1, ccfs2;
2890 int ccf0, ccf1;
2891
2892 if (!oper || !htop)
2893 return false;
2894
2895 ccfs0 = oper->center_freq_seg0_idx;
2896 ccfs1 = oper->center_freq_seg1_idx;
2897 ccfs2 = (le16_to_cpu(htop->operation_mode) &
2898 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2899 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2900
2901 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2902 ccf0 = ccfs0;
2903 ccf1 = ccfs1;
2904 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2905 ccf1 = ccfs2;
2906
2907 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2908 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2909
2910 switch (oper->chan_width) {
2911 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2912 /* just use HT information directly */
2913 break;
2914 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2915 new.width = NL80211_CHAN_WIDTH_80;
2916 new.center_freq1 = cf0;
2917 /* If needed, adjust based on the newer interop workaround. */
2918 if (ccf1) {
2919 unsigned int diff;
2920
2921 diff = abs(ccf1 - ccf0);
2922 if (diff == 8) {
2923 new.width = NL80211_CHAN_WIDTH_160;
2924 new.center_freq1 = cf1;
2925 } else if (diff > 8) {
2926 new.width = NL80211_CHAN_WIDTH_80P80;
2927 new.center_freq2 = cf1;
2928 }
2929 }
2930 break;
2931 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2932 /* deprecated encoding */
2933 new.width = NL80211_CHAN_WIDTH_160;
2934 new.center_freq1 = cf0;
2935 break;
2936 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2937 /* deprecated encoding */
2938 new.width = NL80211_CHAN_WIDTH_80P80;
2939 new.center_freq1 = cf0;
2940 new.center_freq2 = cf1;
2941 break;
2942 default:
2943 return false;
2944 }
2945
2946 if (!cfg80211_chandef_valid(&new))
2947 return false;
2948
2949 *chandef = new;
2950 return true;
2951 }
2952
2953 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2954 const struct ieee80211_supported_band *sband,
2955 const u8 *srates, int srates_len, u32 *rates)
2956 {
2957 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2958 int shift = ieee80211_chandef_get_shift(chandef);
2959 struct ieee80211_rate *br;
2960 int brate, rate, i, j, count = 0;
2961
2962 *rates = 0;
2963
2964 for (i = 0; i < srates_len; i++) {
2965 rate = srates[i] & 0x7f;
2966
2967 for (j = 0; j < sband->n_bitrates; j++) {
2968 br = &sband->bitrates[j];
2969 if ((rate_flags & br->flags) != rate_flags)
2970 continue;
2971
2972 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2973 if (brate == rate) {
2974 *rates |= BIT(j);
2975 count++;
2976 break;
2977 }
2978 }
2979 }
2980 return count;
2981 }
2982
2983 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2984 struct sk_buff *skb, bool need_basic,
2985 enum nl80211_band band)
2986 {
2987 struct ieee80211_local *local = sdata->local;
2988 struct ieee80211_supported_band *sband;
2989 int rate, shift;
2990 u8 i, rates, *pos;
2991 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2992 u32 rate_flags;
2993
2994 shift = ieee80211_vif_get_shift(&sdata->vif);
2995 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2996 sband = local->hw.wiphy->bands[band];
2997 rates = 0;
2998 for (i = 0; i < sband->n_bitrates; i++) {
2999 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3000 continue;
3001 rates++;
3002 }
3003 if (rates > 8)
3004 rates = 8;
3005
3006 if (skb_tailroom(skb) < rates + 2)
3007 return -ENOMEM;
3008
3009 pos = skb_put(skb, rates + 2);
3010 *pos++ = WLAN_EID_SUPP_RATES;
3011 *pos++ = rates;
3012 for (i = 0; i < rates; i++) {
3013 u8 basic = 0;
3014 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3015 continue;
3016
3017 if (need_basic && basic_rates & BIT(i))
3018 basic = 0x80;
3019 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3020 5 * (1 << shift));
3021 *pos++ = basic | (u8) rate;
3022 }
3023
3024 return 0;
3025 }
3026
3027 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3028 struct sk_buff *skb, bool need_basic,
3029 enum nl80211_band band)
3030 {
3031 struct ieee80211_local *local = sdata->local;
3032 struct ieee80211_supported_band *sband;
3033 int rate, shift;
3034 u8 i, exrates, *pos;
3035 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3036 u32 rate_flags;
3037
3038 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3039 shift = ieee80211_vif_get_shift(&sdata->vif);
3040
3041 sband = local->hw.wiphy->bands[band];
3042 exrates = 0;
3043 for (i = 0; i < sband->n_bitrates; i++) {
3044 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3045 continue;
3046 exrates++;
3047 }
3048
3049 if (exrates > 8)
3050 exrates -= 8;
3051 else
3052 exrates = 0;
3053
3054 if (skb_tailroom(skb) < exrates + 2)
3055 return -ENOMEM;
3056
3057 if (exrates) {
3058 pos = skb_put(skb, exrates + 2);
3059 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3060 *pos++ = exrates;
3061 for (i = 8; i < sband->n_bitrates; i++) {
3062 u8 basic = 0;
3063 if ((rate_flags & sband->bitrates[i].flags)
3064 != rate_flags)
3065 continue;
3066 if (need_basic && basic_rates & BIT(i))
3067 basic = 0x80;
3068 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3069 5 * (1 << shift));
3070 *pos++ = basic | (u8) rate;
3071 }
3072 }
3073 return 0;
3074 }
3075
3076 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3077 {
3078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3080
3081 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3082 /* non-managed type inferfaces */
3083 return 0;
3084 }
3085 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3086 }
3087 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3088
3089 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3090 {
3091 if (!mcs)
3092 return 1;
3093
3094 /* TODO: consider rx_highest */
3095
3096 if (mcs->rx_mask[3])
3097 return 4;
3098 if (mcs->rx_mask[2])
3099 return 3;
3100 if (mcs->rx_mask[1])
3101 return 2;
3102 return 1;
3103 }
3104
3105 /**
3106 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3107 * @local: mac80211 hw info struct
3108 * @status: RX status
3109 * @mpdu_len: total MPDU length (including FCS)
3110 * @mpdu_offset: offset into MPDU to calculate timestamp at
3111 *
3112 * This function calculates the RX timestamp at the given MPDU offset, taking
3113 * into account what the RX timestamp was. An offset of 0 will just normalize
3114 * the timestamp to TSF at beginning of MPDU reception.
3115 */
3116 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3117 struct ieee80211_rx_status *status,
3118 unsigned int mpdu_len,
3119 unsigned int mpdu_offset)
3120 {
3121 u64 ts = status->mactime;
3122 struct rate_info ri;
3123 u16 rate;
3124
3125 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3126 return 0;
3127
3128 memset(&ri, 0, sizeof(ri));
3129
3130 ri.bw = status->bw;
3131
3132 /* Fill cfg80211 rate info */
3133 switch (status->encoding) {
3134 case RX_ENC_HT:
3135 ri.mcs = status->rate_idx;
3136 ri.flags |= RATE_INFO_FLAGS_MCS;
3137 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3138 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3139 break;
3140 case RX_ENC_VHT:
3141 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3142 ri.mcs = status->rate_idx;
3143 ri.nss = status->nss;
3144 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3145 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3146 break;
3147 default:
3148 WARN_ON(1);
3149 /* fall through */
3150 case RX_ENC_LEGACY: {
3151 struct ieee80211_supported_band *sband;
3152 int shift = 0;
3153 int bitrate;
3154
3155 switch (status->bw) {
3156 case RATE_INFO_BW_10:
3157 shift = 1;
3158 break;
3159 case RATE_INFO_BW_5:
3160 shift = 2;
3161 break;
3162 }
3163
3164 sband = local->hw.wiphy->bands[status->band];
3165 bitrate = sband->bitrates[status->rate_idx].bitrate;
3166 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3167
3168 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3169 /* TODO: handle HT/VHT preambles */
3170 if (status->band == NL80211_BAND_5GHZ) {
3171 ts += 20 << shift;
3172 mpdu_offset += 2;
3173 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3174 ts += 96;
3175 } else {
3176 ts += 192;
3177 }
3178 }
3179 break;
3180 }
3181 }
3182
3183 rate = cfg80211_calculate_bitrate(&ri);
3184 if (WARN_ONCE(!rate,
3185 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3186 (unsigned long long)status->flag, status->rate_idx,
3187 status->nss))
3188 return 0;
3189
3190 /* rewind from end of MPDU */
3191 if (status->flag & RX_FLAG_MACTIME_END)
3192 ts -= mpdu_len * 8 * 10 / rate;
3193
3194 ts += mpdu_offset * 8 * 10 / rate;
3195
3196 return ts;
3197 }
3198
3199 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3200 {
3201 struct ieee80211_sub_if_data *sdata;
3202 struct cfg80211_chan_def chandef;
3203
3204 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3205 ASSERT_RTNL();
3206
3207 mutex_lock(&local->mtx);
3208 list_for_each_entry(sdata, &local->interfaces, list) {
3209 /* it might be waiting for the local->mtx, but then
3210 * by the time it gets it, sdata->wdev.cac_started
3211 * will no longer be true
3212 */
3213 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3214
3215 if (sdata->wdev.cac_started) {
3216 chandef = sdata->vif.bss_conf.chandef;
3217 ieee80211_vif_release_channel(sdata);
3218 cfg80211_cac_event(sdata->dev,
3219 &chandef,
3220 NL80211_RADAR_CAC_ABORTED,
3221 GFP_KERNEL);
3222 }
3223 }
3224 mutex_unlock(&local->mtx);
3225 }
3226
3227 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3228 {
3229 struct ieee80211_local *local =
3230 container_of(work, struct ieee80211_local, radar_detected_work);
3231 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3232 struct ieee80211_chanctx *ctx;
3233 int num_chanctx = 0;
3234
3235 mutex_lock(&local->chanctx_mtx);
3236 list_for_each_entry(ctx, &local->chanctx_list, list) {
3237 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3238 continue;
3239
3240 num_chanctx++;
3241 chandef = ctx->conf.def;
3242 }
3243 mutex_unlock(&local->chanctx_mtx);
3244
3245 rtnl_lock();
3246 ieee80211_dfs_cac_cancel(local);
3247 rtnl_unlock();
3248
3249 if (num_chanctx > 1)
3250 /* XXX: multi-channel is not supported yet */
3251 WARN_ON(1);
3252 else
3253 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3254 }
3255
3256 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3257 {
3258 struct ieee80211_local *local = hw_to_local(hw);
3259
3260 trace_api_radar_detected(local);
3261
3262 schedule_work(&local->radar_detected_work);
3263 }
3264 EXPORT_SYMBOL(ieee80211_radar_detected);
3265
3266 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3267 {
3268 u32 ret;
3269 int tmp;
3270
3271 switch (c->width) {
3272 case NL80211_CHAN_WIDTH_20:
3273 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3274 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3275 break;
3276 case NL80211_CHAN_WIDTH_40:
3277 c->width = NL80211_CHAN_WIDTH_20;
3278 c->center_freq1 = c->chan->center_freq;
3279 ret = IEEE80211_STA_DISABLE_40MHZ |
3280 IEEE80211_STA_DISABLE_VHT;
3281 break;
3282 case NL80211_CHAN_WIDTH_80:
3283 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3284 /* n_P40 */
3285 tmp /= 2;
3286 /* freq_P40 */
3287 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3288 c->width = NL80211_CHAN_WIDTH_40;
3289 ret = IEEE80211_STA_DISABLE_VHT;
3290 break;
3291 case NL80211_CHAN_WIDTH_80P80:
3292 c->center_freq2 = 0;
3293 c->width = NL80211_CHAN_WIDTH_80;
3294 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3295 IEEE80211_STA_DISABLE_160MHZ;
3296 break;
3297 case NL80211_CHAN_WIDTH_160:
3298 /* n_P20 */
3299 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3300 /* n_P80 */
3301 tmp /= 4;
3302 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3303 c->width = NL80211_CHAN_WIDTH_80;
3304 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3305 IEEE80211_STA_DISABLE_160MHZ;
3306 break;
3307 default:
3308 case NL80211_CHAN_WIDTH_20_NOHT:
3309 WARN_ON_ONCE(1);
3310 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3311 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3312 break;
3313 case NL80211_CHAN_WIDTH_5:
3314 case NL80211_CHAN_WIDTH_10:
3315 WARN_ON_ONCE(1);
3316 /* keep c->width */
3317 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3318 break;
3319 }
3320
3321 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3322
3323 return ret;
3324 }
3325
3326 /*
3327 * Returns true if smps_mode_new is strictly more restrictive than
3328 * smps_mode_old.
3329 */
3330 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3331 enum ieee80211_smps_mode smps_mode_new)
3332 {
3333 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3334 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3335 return false;
3336
3337 switch (smps_mode_old) {
3338 case IEEE80211_SMPS_STATIC:
3339 return false;
3340 case IEEE80211_SMPS_DYNAMIC:
3341 return smps_mode_new == IEEE80211_SMPS_STATIC;
3342 case IEEE80211_SMPS_OFF:
3343 return smps_mode_new != IEEE80211_SMPS_OFF;
3344 default:
3345 WARN_ON(1);
3346 }
3347
3348 return false;
3349 }
3350
3351 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3352 struct cfg80211_csa_settings *csa_settings)
3353 {
3354 struct sk_buff *skb;
3355 struct ieee80211_mgmt *mgmt;
3356 struct ieee80211_local *local = sdata->local;
3357 int freq;
3358 int hdr_len = offsetofend(struct ieee80211_mgmt,
3359 u.action.u.chan_switch);
3360 u8 *pos;
3361
3362 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3363 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3364 return -EOPNOTSUPP;
3365
3366 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3367 5 + /* channel switch announcement element */
3368 3 + /* secondary channel offset element */
3369 5 + /* wide bandwidth channel switch announcement */
3370 8); /* mesh channel switch parameters element */
3371 if (!skb)
3372 return -ENOMEM;
3373
3374 skb_reserve(skb, local->tx_headroom);
3375 mgmt = skb_put_zero(skb, hdr_len);
3376 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3377 IEEE80211_STYPE_ACTION);
3378
3379 eth_broadcast_addr(mgmt->da);
3380 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3381 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3382 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3383 } else {
3384 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3385 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3386 }
3387 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3388 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3389 pos = skb_put(skb, 5);
3390 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3391 *pos++ = 3; /* IE length */
3392 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3393 freq = csa_settings->chandef.chan->center_freq;
3394 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3395 *pos++ = csa_settings->count; /* count */
3396
3397 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3398 enum nl80211_channel_type ch_type;
3399
3400 skb_put(skb, 3);
3401 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3402 *pos++ = 1; /* IE length */
3403 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3404 if (ch_type == NL80211_CHAN_HT40PLUS)
3405 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3406 else
3407 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3408 }
3409
3410 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3411 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3412
3413 skb_put(skb, 8);
3414 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3415 *pos++ = 6; /* IE length */
3416 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3417 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3418 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3419 *pos++ |= csa_settings->block_tx ?
3420 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3421 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3422 pos += 2;
3423 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3424 pos += 2;
3425 }
3426
3427 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3428 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3429 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3430 skb_put(skb, 5);
3431 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3432 }
3433
3434 ieee80211_tx_skb(sdata, skb);
3435 return 0;
3436 }
3437
3438 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3439 {
3440 return !(cs == NULL || cs->cipher == 0 ||
3441 cs->hdr_len < cs->pn_len + cs->pn_off ||
3442 cs->hdr_len <= cs->key_idx_off ||
3443 cs->key_idx_shift > 7 ||
3444 cs->key_idx_mask == 0);
3445 }
3446
3447 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3448 {
3449 int i;
3450
3451 /* Ensure we have enough iftype bitmap space for all iftype values */
3452 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3453
3454 for (i = 0; i < n; i++)
3455 if (!ieee80211_cs_valid(&cs[i]))
3456 return false;
3457
3458 return true;
3459 }
3460
3461 const struct ieee80211_cipher_scheme *
3462 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3463 enum nl80211_iftype iftype)
3464 {
3465 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3466 int n = local->hw.n_cipher_schemes;
3467 int i;
3468 const struct ieee80211_cipher_scheme *cs = NULL;
3469
3470 for (i = 0; i < n; i++) {
3471 if (l[i].cipher == cipher) {
3472 cs = &l[i];
3473 break;
3474 }
3475 }
3476
3477 if (!cs || !(cs->iftype & BIT(iftype)))
3478 return NULL;
3479
3480 return cs;
3481 }
3482
3483 int ieee80211_cs_headroom(struct ieee80211_local *local,
3484 struct cfg80211_crypto_settings *crypto,
3485 enum nl80211_iftype iftype)
3486 {
3487 const struct ieee80211_cipher_scheme *cs;
3488 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3489 int i;
3490
3491 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3492 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3493 iftype);
3494
3495 if (cs && headroom < cs->hdr_len)
3496 headroom = cs->hdr_len;
3497 }
3498
3499 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3500 if (cs && headroom < cs->hdr_len)
3501 headroom = cs->hdr_len;
3502
3503 return headroom;
3504 }
3505
3506 static bool
3507 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3508 {
3509 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3510 int skip;
3511
3512 if (end > 0)
3513 return false;
3514
3515 /* One shot NOA */
3516 if (data->count[i] == 1)
3517 return false;
3518
3519 if (data->desc[i].interval == 0)
3520 return false;
3521
3522 /* End time is in the past, check for repetitions */
3523 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3524 if (data->count[i] < 255) {
3525 if (data->count[i] <= skip) {
3526 data->count[i] = 0;
3527 return false;
3528 }
3529
3530 data->count[i] -= skip;
3531 }
3532
3533 data->desc[i].start += skip * data->desc[i].interval;
3534
3535 return true;
3536 }
3537
3538 static bool
3539 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3540 s32 *offset)
3541 {
3542 bool ret = false;
3543 int i;
3544
3545 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3546 s32 cur;
3547
3548 if (!data->count[i])
3549 continue;
3550
3551 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3552 ret = true;
3553
3554 cur = data->desc[i].start - tsf;
3555 if (cur > *offset)
3556 continue;
3557
3558 cur = data->desc[i].start + data->desc[i].duration - tsf;
3559 if (cur > *offset)
3560 *offset = cur;
3561 }
3562
3563 return ret;
3564 }
3565
3566 static u32
3567 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3568 {
3569 s32 offset = 0;
3570 int tries = 0;
3571 /*
3572 * arbitrary limit, used to avoid infinite loops when combined NoA
3573 * descriptors cover the full time period.
3574 */
3575 int max_tries = 5;
3576
3577 ieee80211_extend_absent_time(data, tsf, &offset);
3578 do {
3579 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3580 break;
3581
3582 tries++;
3583 } while (tries < max_tries);
3584
3585 return offset;
3586 }
3587
3588 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3589 {
3590 u32 next_offset = BIT(31) - 1;
3591 int i;
3592
3593 data->absent = 0;
3594 data->has_next_tsf = false;
3595 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3596 s32 start;
3597
3598 if (!data->count[i])
3599 continue;
3600
3601 ieee80211_extend_noa_desc(data, tsf, i);
3602 start = data->desc[i].start - tsf;
3603 if (start <= 0)
3604 data->absent |= BIT(i);
3605
3606 if (next_offset > start)
3607 next_offset = start;
3608
3609 data->has_next_tsf = true;
3610 }
3611
3612 if (data->absent)
3613 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3614
3615 data->next_tsf = tsf + next_offset;
3616 }
3617 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3618
3619 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3620 struct ieee80211_noa_data *data, u32 tsf)
3621 {
3622 int ret = 0;
3623 int i;
3624
3625 memset(data, 0, sizeof(*data));
3626
3627 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3628 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3629
3630 if (!desc->count || !desc->duration)
3631 continue;
3632
3633 data->count[i] = desc->count;
3634 data->desc[i].start = le32_to_cpu(desc->start_time);
3635 data->desc[i].duration = le32_to_cpu(desc->duration);
3636 data->desc[i].interval = le32_to_cpu(desc->interval);
3637
3638 if (data->count[i] > 1 &&
3639 data->desc[i].interval < data->desc[i].duration)
3640 continue;
3641
3642 ieee80211_extend_noa_desc(data, tsf, i);
3643 ret++;
3644 }
3645
3646 if (ret)
3647 ieee80211_update_p2p_noa(data, tsf);
3648
3649 return ret;
3650 }
3651 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3652
3653 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3654 struct ieee80211_sub_if_data *sdata)
3655 {
3656 u64 tsf = drv_get_tsf(local, sdata);
3657 u64 dtim_count = 0;
3658 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3659 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3660 struct ps_data *ps;
3661 u8 bcns_from_dtim;
3662
3663 if (tsf == -1ULL || !beacon_int || !dtim_period)
3664 return;
3665
3666 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3667 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3668 if (!sdata->bss)
3669 return;
3670
3671 ps = &sdata->bss->ps;
3672 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3673 ps = &sdata->u.mesh.ps;
3674 } else {
3675 return;
3676 }
3677
3678 /*
3679 * actually finds last dtim_count, mac80211 will update in
3680 * __beacon_add_tim().
3681 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3682 */
3683 do_div(tsf, beacon_int);
3684 bcns_from_dtim = do_div(tsf, dtim_period);
3685 /* just had a DTIM */
3686 if (!bcns_from_dtim)
3687 dtim_count = 0;
3688 else
3689 dtim_count = dtim_period - bcns_from_dtim;
3690
3691 ps->dtim_count = dtim_count;
3692 }
3693
3694 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3695 struct ieee80211_chanctx *ctx)
3696 {
3697 struct ieee80211_sub_if_data *sdata;
3698 u8 radar_detect = 0;
3699
3700 lockdep_assert_held(&local->chanctx_mtx);
3701
3702 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3703 return 0;
3704
3705 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3706 if (sdata->reserved_radar_required)
3707 radar_detect |= BIT(sdata->reserved_chandef.width);
3708
3709 /*
3710 * An in-place reservation context should not have any assigned vifs
3711 * until it replaces the other context.
3712 */
3713 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3714 !list_empty(&ctx->assigned_vifs));
3715
3716 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3717 if (sdata->radar_required)
3718 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3719
3720 return radar_detect;
3721 }
3722
3723 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3724 const struct cfg80211_chan_def *chandef,
3725 enum ieee80211_chanctx_mode chanmode,
3726 u8 radar_detect)
3727 {
3728 struct ieee80211_local *local = sdata->local;
3729 struct ieee80211_sub_if_data *sdata_iter;
3730 enum nl80211_iftype iftype = sdata->wdev.iftype;
3731 struct ieee80211_chanctx *ctx;
3732 int total = 1;
3733 struct iface_combination_params params = {
3734 .radar_detect = radar_detect,
3735 };
3736
3737 lockdep_assert_held(&local->chanctx_mtx);
3738
3739 if (WARN_ON(hweight32(radar_detect) > 1))
3740 return -EINVAL;
3741
3742 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3743 !chandef->chan))
3744 return -EINVAL;
3745
3746 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3747 return -EINVAL;
3748
3749 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3750 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3751 /*
3752 * always passing this is harmless, since it'll be the
3753 * same value that cfg80211 finds if it finds the same
3754 * interface ... and that's always allowed
3755 */
3756 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3757 }
3758
3759 /* Always allow software iftypes */
3760 if (local->hw.wiphy->software_iftypes & BIT(iftype) ||
3761 (iftype == NL80211_IFTYPE_AP_VLAN &&
3762 local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) {
3763 if (radar_detect)
3764 return -EINVAL;
3765 return 0;
3766 }
3767
3768 if (chandef)
3769 params.num_different_channels = 1;
3770
3771 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3772 params.iftype_num[iftype] = 1;
3773
3774 list_for_each_entry(ctx, &local->chanctx_list, list) {
3775 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3776 continue;
3777 params.radar_detect |=
3778 ieee80211_chanctx_radar_detect(local, ctx);
3779 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3780 params.num_different_channels++;
3781 continue;
3782 }
3783 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3784 cfg80211_chandef_compatible(chandef,
3785 &ctx->conf.def))
3786 continue;
3787 params.num_different_channels++;
3788 }
3789
3790 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3791 struct wireless_dev *wdev_iter;
3792
3793 wdev_iter = &sdata_iter->wdev;
3794
3795 if (sdata_iter == sdata ||
3796 !ieee80211_sdata_running(sdata_iter) ||
3797 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3798 continue;
3799
3800 params.iftype_num[wdev_iter->iftype]++;
3801 total++;
3802 }
3803
3804 if (total == 1 && !params.radar_detect)
3805 return 0;
3806
3807 return cfg80211_check_combinations(local->hw.wiphy, &params);
3808 }
3809
3810 static void
3811 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3812 void *data)
3813 {
3814 u32 *max_num_different_channels = data;
3815
3816 *max_num_different_channels = max(*max_num_different_channels,
3817 c->num_different_channels);
3818 }
3819
3820 int ieee80211_max_num_channels(struct ieee80211_local *local)
3821 {
3822 struct ieee80211_sub_if_data *sdata;
3823 struct ieee80211_chanctx *ctx;
3824 u32 max_num_different_channels = 1;
3825 int err;
3826 struct iface_combination_params params = {0};
3827
3828 lockdep_assert_held(&local->chanctx_mtx);
3829
3830 list_for_each_entry(ctx, &local->chanctx_list, list) {
3831 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3832 continue;
3833
3834 params.num_different_channels++;
3835
3836 params.radar_detect |=
3837 ieee80211_chanctx_radar_detect(local, ctx);
3838 }
3839
3840 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3841 params.iftype_num[sdata->wdev.iftype]++;
3842
3843 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3844 ieee80211_iter_max_chans,
3845 &max_num_different_channels);
3846 if (err < 0)
3847 return err;
3848
3849 return max_num_different_channels;
3850 }
3851
3852 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3853 {
3854 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3855 *buf++ = 7; /* len */
3856 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3857 *buf++ = 0x50;
3858 *buf++ = 0xf2;
3859 *buf++ = 2; /* WME */
3860 *buf++ = 0; /* WME info */
3861 *buf++ = 1; /* WME ver */
3862 *buf++ = qosinfo; /* U-APSD no in use */
3863
3864 return buf;
3865 }
3866
3867 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3868 unsigned long *frame_cnt,
3869 unsigned long *byte_cnt)
3870 {
3871 struct txq_info *txqi = to_txq_info(txq);
3872 u32 frag_cnt = 0, frag_bytes = 0;
3873 struct sk_buff *skb;
3874
3875 skb_queue_walk(&txqi->frags, skb) {
3876 frag_cnt++;
3877 frag_bytes += skb->len;
3878 }
3879
3880 if (frame_cnt)
3881 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3882
3883 if (byte_cnt)
3884 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3885 }
3886 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3887
3888 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3889 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3890 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3891 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3892 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3893 };
Linux with added FPC-III support