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spi: sprd: adi: Change hwlock to be optional
[linux/fpc-iii.git] / net / mac80211 / util.c
blob1b224fa27367fbf4ce7cc7385eb27f8051081704
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2015-2017 Intel Deutschland GmbH
9 * Copyright (C) 2018-2019 Intel Corporation
10 *
11 * utilities for mac80211
12 */
13
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wme.h"
33 #include "led.h"
34 #include "wep.h"
35
36 /* privid for wiphys to determine whether they belong to us or not */
37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40 {
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46 }
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
50 {
51 struct sk_buff *skb;
52 struct ieee80211_hdr *hdr;
53
54 skb_queue_walk(&tx->skbs, skb) {
55 hdr = (struct ieee80211_hdr *) skb->data;
56 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
57 }
58 }
59
60 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
61 int rate, int erp, int short_preamble,
62 int shift)
63 {
64 int dur;
65
66 /* calculate duration (in microseconds, rounded up to next higher
67 * integer if it includes a fractional microsecond) to send frame of
68 * len bytes (does not include FCS) at the given rate. Duration will
69 * also include SIFS.
70 *
71 * rate is in 100 kbps, so divident is multiplied by 10 in the
72 * DIV_ROUND_UP() operations.
73 *
74 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
75 * is assumed to be 0 otherwise.
76 */
77
78 if (band == NL80211_BAND_5GHZ || erp) {
79 /*
80 * OFDM:
81 *
82 * N_DBPS = DATARATE x 4
83 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
84 * (16 = SIGNAL time, 6 = tail bits)
85 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
86 *
87 * T_SYM = 4 usec
88 * 802.11a - 18.5.2: aSIFSTime = 16 usec
89 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
90 * signal ext = 6 usec
91 */
92 dur = 16; /* SIFS + signal ext */
93 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
94 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
95
96 /* IEEE 802.11-2012 18.3.2.4: all values above are:
97 * * times 4 for 5 MHz
98 * * times 2 for 10 MHz
99 */
100 dur *= 1 << shift;
101
102 /* rates should already consider the channel bandwidth,
103 * don't apply divisor again.
104 */
105 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
106 4 * rate); /* T_SYM x N_SYM */
107 } else {
108 /*
109 * 802.11b or 802.11g with 802.11b compatibility:
110 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
111 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
112 *
113 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
114 * aSIFSTime = 10 usec
115 * aPreambleLength = 144 usec or 72 usec with short preamble
116 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
117 */
118 dur = 10; /* aSIFSTime = 10 usec */
119 dur += short_preamble ? (72 + 24) : (144 + 48);
120
121 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
122 }
123
124 return dur;
125 }
126
127 /* Exported duration function for driver use */
128 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
129 struct ieee80211_vif *vif,
130 enum nl80211_band band,
131 size_t frame_len,
132 struct ieee80211_rate *rate)
133 {
134 struct ieee80211_sub_if_data *sdata;
135 u16 dur;
136 int erp, shift = 0;
137 bool short_preamble = false;
138
139 erp = 0;
140 if (vif) {
141 sdata = vif_to_sdata(vif);
142 short_preamble = sdata->vif.bss_conf.use_short_preamble;
143 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
144 erp = rate->flags & IEEE80211_RATE_ERP_G;
145 shift = ieee80211_vif_get_shift(vif);
146 }
147
148 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
149 short_preamble, shift);
150
151 return cpu_to_le16(dur);
152 }
153 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
154
155 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
156 struct ieee80211_vif *vif, size_t frame_len,
157 const struct ieee80211_tx_info *frame_txctl)
158 {
159 struct ieee80211_local *local = hw_to_local(hw);
160 struct ieee80211_rate *rate;
161 struct ieee80211_sub_if_data *sdata;
162 bool short_preamble;
163 int erp, shift = 0, bitrate;
164 u16 dur;
165 struct ieee80211_supported_band *sband;
166
167 sband = local->hw.wiphy->bands[frame_txctl->band];
168
169 short_preamble = false;
170
171 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
172
173 erp = 0;
174 if (vif) {
175 sdata = vif_to_sdata(vif);
176 short_preamble = sdata->vif.bss_conf.use_short_preamble;
177 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
178 erp = rate->flags & IEEE80211_RATE_ERP_G;
179 shift = ieee80211_vif_get_shift(vif);
180 }
181
182 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
183
184 /* CTS duration */
185 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
186 erp, short_preamble, shift);
187 /* Data frame duration */
188 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
189 erp, short_preamble, shift);
190 /* ACK duration */
191 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
192 erp, short_preamble, shift);
193
194 return cpu_to_le16(dur);
195 }
196 EXPORT_SYMBOL(ieee80211_rts_duration);
197
198 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
199 struct ieee80211_vif *vif,
200 size_t frame_len,
201 const struct ieee80211_tx_info *frame_txctl)
202 {
203 struct ieee80211_local *local = hw_to_local(hw);
204 struct ieee80211_rate *rate;
205 struct ieee80211_sub_if_data *sdata;
206 bool short_preamble;
207 int erp, shift = 0, bitrate;
208 u16 dur;
209 struct ieee80211_supported_band *sband;
210
211 sband = local->hw.wiphy->bands[frame_txctl->band];
212
213 short_preamble = false;
214
215 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
216 erp = 0;
217 if (vif) {
218 sdata = vif_to_sdata(vif);
219 short_preamble = sdata->vif.bss_conf.use_short_preamble;
220 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
221 erp = rate->flags & IEEE80211_RATE_ERP_G;
222 shift = ieee80211_vif_get_shift(vif);
223 }
224
225 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
226
227 /* Data frame duration */
228 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
229 erp, short_preamble, shift);
230 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
231 /* ACK duration */
232 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
233 erp, short_preamble, shift);
234 }
235
236 return cpu_to_le16(dur);
237 }
238 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
239
240 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
241 {
242 struct ieee80211_local *local = sdata->local;
243 struct ieee80211_vif *vif = &sdata->vif;
244 struct fq *fq = &local->fq;
245 struct ps_data *ps = NULL;
246 struct txq_info *txqi;
247 struct sta_info *sta;
248 int i;
249
250 spin_lock_bh(&fq->lock);
251
252 if (sdata->vif.type == NL80211_IFTYPE_AP)
253 ps = &sdata->bss->ps;
254
255 sdata->vif.txqs_stopped[ac] = false;
256
257 list_for_each_entry_rcu(sta, &local->sta_list, list) {
258 if (sdata != sta->sdata)
259 continue;
260
261 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
262 struct ieee80211_txq *txq = sta->sta.txq[i];
263
264 if (!txq)
265 continue;
266
267 txqi = to_txq_info(txq);
268
269 if (ac != txq->ac)
270 continue;
271
272 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
273 &txqi->flags))
274 continue;
275
276 spin_unlock_bh(&fq->lock);
277 drv_wake_tx_queue(local, txqi);
278 spin_lock_bh(&fq->lock);
279 }
280 }
281
282 if (!vif->txq)
283 goto out;
284
285 txqi = to_txq_info(vif->txq);
286
287 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
288 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
289 goto out;
290
291 spin_unlock_bh(&fq->lock);
292
293 drv_wake_tx_queue(local, txqi);
294 return;
295 out:
296 spin_unlock_bh(&fq->lock);
297 }
298
299 static void
300 __releases(&local->queue_stop_reason_lock)
301 __acquires(&local->queue_stop_reason_lock)
302 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
303 {
304 struct ieee80211_sub_if_data *sdata;
305 int n_acs = IEEE80211_NUM_ACS;
306 int i;
307
308 rcu_read_lock();
309
310 if (local->hw.queues < IEEE80211_NUM_ACS)
311 n_acs = 1;
312
313 for (i = 0; i < local->hw.queues; i++) {
314 if (local->queue_stop_reasons[i])
315 continue;
316
317 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
318 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
319 int ac;
320
321 for (ac = 0; ac < n_acs; ac++) {
322 int ac_queue = sdata->vif.hw_queue[ac];
323
324 if (ac_queue == i ||
325 sdata->vif.cab_queue == i)
326 __ieee80211_wake_txqs(sdata, ac);
327 }
328 }
329 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
330 }
331
332 rcu_read_unlock();
333 }
334
335 void ieee80211_wake_txqs(unsigned long data)
336 {
337 struct ieee80211_local *local = (struct ieee80211_local *)data;
338 unsigned long flags;
339
340 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
341 _ieee80211_wake_txqs(local, &flags);
342 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
343 }
344
345 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
346 {
347 struct ieee80211_sub_if_data *sdata;
348 int n_acs = IEEE80211_NUM_ACS;
349
350 if (local->ops->wake_tx_queue)
351 return;
352
353 if (local->hw.queues < IEEE80211_NUM_ACS)
354 n_acs = 1;
355
356 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
357 int ac;
358
359 if (!sdata->dev)
360 continue;
361
362 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
363 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
364 continue;
365
366 for (ac = 0; ac < n_acs; ac++) {
367 int ac_queue = sdata->vif.hw_queue[ac];
368
369 if (ac_queue == queue ||
370 (sdata->vif.cab_queue == queue &&
371 local->queue_stop_reasons[ac_queue] == 0 &&
372 skb_queue_empty(&local->pending[ac_queue])))
373 netif_wake_subqueue(sdata->dev, ac);
374 }
375 }
376 }
377
378 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
379 enum queue_stop_reason reason,
380 bool refcounted,
381 unsigned long *flags)
382 {
383 struct ieee80211_local *local = hw_to_local(hw);
384
385 trace_wake_queue(local, queue, reason);
386
387 if (WARN_ON(queue >= hw->queues))
388 return;
389
390 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
391 return;
392
393 if (!refcounted) {
394 local->q_stop_reasons[queue][reason] = 0;
395 } else {
396 local->q_stop_reasons[queue][reason]--;
397 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
398 local->q_stop_reasons[queue][reason] = 0;
399 }
400
401 if (local->q_stop_reasons[queue][reason] == 0)
402 __clear_bit(reason, &local->queue_stop_reasons[queue]);
403
404 if (local->queue_stop_reasons[queue] != 0)
405 /* someone still has this queue stopped */
406 return;
407
408 if (skb_queue_empty(&local->pending[queue])) {
409 rcu_read_lock();
410 ieee80211_propagate_queue_wake(local, queue);
411 rcu_read_unlock();
412 } else
413 tasklet_schedule(&local->tx_pending_tasklet);
414
415 /*
416 * Calling _ieee80211_wake_txqs here can be a problem because it may
417 * release queue_stop_reason_lock which has been taken by
418 * __ieee80211_wake_queue's caller. It is certainly not very nice to
419 * release someone's lock, but it is fine because all the callers of
420 * __ieee80211_wake_queue call it right before releasing the lock.
421 */
422 if (local->ops->wake_tx_queue) {
423 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
424 tasklet_schedule(&local->wake_txqs_tasklet);
425 else
426 _ieee80211_wake_txqs(local, flags);
427 }
428 }
429
430 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
431 enum queue_stop_reason reason,
432 bool refcounted)
433 {
434 struct ieee80211_local *local = hw_to_local(hw);
435 unsigned long flags;
436
437 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
438 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
439 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
440 }
441
442 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
443 {
444 ieee80211_wake_queue_by_reason(hw, queue,
445 IEEE80211_QUEUE_STOP_REASON_DRIVER,
446 false);
447 }
448 EXPORT_SYMBOL(ieee80211_wake_queue);
449
450 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
451 enum queue_stop_reason reason,
452 bool refcounted)
453 {
454 struct ieee80211_local *local = hw_to_local(hw);
455 struct ieee80211_sub_if_data *sdata;
456 int n_acs = IEEE80211_NUM_ACS;
457
458 trace_stop_queue(local, queue, reason);
459
460 if (WARN_ON(queue >= hw->queues))
461 return;
462
463 if (!refcounted)
464 local->q_stop_reasons[queue][reason] = 1;
465 else
466 local->q_stop_reasons[queue][reason]++;
467
468 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
469 return;
470
471 if (local->hw.queues < IEEE80211_NUM_ACS)
472 n_acs = 1;
473
474 rcu_read_lock();
475 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
476 int ac;
477
478 if (!sdata->dev)
479 continue;
480
481 for (ac = 0; ac < n_acs; ac++) {
482 if (sdata->vif.hw_queue[ac] == queue ||
483 sdata->vif.cab_queue == queue) {
484 if (!local->ops->wake_tx_queue) {
485 netif_stop_subqueue(sdata->dev, ac);
486 continue;
487 }
488 spin_lock(&local->fq.lock);
489 sdata->vif.txqs_stopped[ac] = true;
490 spin_unlock(&local->fq.lock);
491 }
492 }
493 }
494 rcu_read_unlock();
495 }
496
497 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
498 enum queue_stop_reason reason,
499 bool refcounted)
500 {
501 struct ieee80211_local *local = hw_to_local(hw);
502 unsigned long flags;
503
504 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
505 __ieee80211_stop_queue(hw, queue, reason, refcounted);
506 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
507 }
508
509 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
510 {
511 ieee80211_stop_queue_by_reason(hw, queue,
512 IEEE80211_QUEUE_STOP_REASON_DRIVER,
513 false);
514 }
515 EXPORT_SYMBOL(ieee80211_stop_queue);
516
517 void ieee80211_add_pending_skb(struct ieee80211_local *local,
518 struct sk_buff *skb)
519 {
520 struct ieee80211_hw *hw = &local->hw;
521 unsigned long flags;
522 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
523 int queue = info->hw_queue;
524
525 if (WARN_ON(!info->control.vif)) {
526 ieee80211_free_txskb(&local->hw, skb);
527 return;
528 }
529
530 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
531 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
532 false);
533 __skb_queue_tail(&local->pending[queue], skb);
534 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
535 false, &flags);
536 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
537 }
538
539 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
540 struct sk_buff_head *skbs)
541 {
542 struct ieee80211_hw *hw = &local->hw;
543 struct sk_buff *skb;
544 unsigned long flags;
545 int queue, i;
546
547 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
548 while ((skb = skb_dequeue(skbs))) {
549 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
550
551 if (WARN_ON(!info->control.vif)) {
552 ieee80211_free_txskb(&local->hw, skb);
553 continue;
554 }
555
556 queue = info->hw_queue;
557
558 __ieee80211_stop_queue(hw, queue,
559 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
560 false);
561
562 __skb_queue_tail(&local->pending[queue], skb);
563 }
564
565 for (i = 0; i < hw->queues; i++)
566 __ieee80211_wake_queue(hw, i,
567 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
568 false, &flags);
569 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
570 }
571
572 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
573 unsigned long queues,
574 enum queue_stop_reason reason,
575 bool refcounted)
576 {
577 struct ieee80211_local *local = hw_to_local(hw);
578 unsigned long flags;
579 int i;
580
581 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
582
583 for_each_set_bit(i, &queues, hw->queues)
584 __ieee80211_stop_queue(hw, i, reason, refcounted);
585
586 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
587 }
588
589 void ieee80211_stop_queues(struct ieee80211_hw *hw)
590 {
591 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
592 IEEE80211_QUEUE_STOP_REASON_DRIVER,
593 false);
594 }
595 EXPORT_SYMBOL(ieee80211_stop_queues);
596
597 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
598 {
599 struct ieee80211_local *local = hw_to_local(hw);
600 unsigned long flags;
601 int ret;
602
603 if (WARN_ON(queue >= hw->queues))
604 return true;
605
606 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
607 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
608 &local->queue_stop_reasons[queue]);
609 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
610 return ret;
611 }
612 EXPORT_SYMBOL(ieee80211_queue_stopped);
613
614 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
615 unsigned long queues,
616 enum queue_stop_reason reason,
617 bool refcounted)
618 {
619 struct ieee80211_local *local = hw_to_local(hw);
620 unsigned long flags;
621 int i;
622
623 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
624
625 for_each_set_bit(i, &queues, hw->queues)
626 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
627
628 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
629 }
630
631 void ieee80211_wake_queues(struct ieee80211_hw *hw)
632 {
633 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
634 IEEE80211_QUEUE_STOP_REASON_DRIVER,
635 false);
636 }
637 EXPORT_SYMBOL(ieee80211_wake_queues);
638
639 static unsigned int
640 ieee80211_get_vif_queues(struct ieee80211_local *local,
641 struct ieee80211_sub_if_data *sdata)
642 {
643 unsigned int queues;
644
645 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
646 int ac;
647
648 queues = 0;
649
650 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
651 queues |= BIT(sdata->vif.hw_queue[ac]);
652 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
653 queues |= BIT(sdata->vif.cab_queue);
654 } else {
655 /* all queues */
656 queues = BIT(local->hw.queues) - 1;
657 }
658
659 return queues;
660 }
661
662 void __ieee80211_flush_queues(struct ieee80211_local *local,
663 struct ieee80211_sub_if_data *sdata,
664 unsigned int queues, bool drop)
665 {
666 if (!local->ops->flush)
667 return;
668
669 /*
670 * If no queue was set, or if the HW doesn't support
671 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
672 */
673 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
674 queues = ieee80211_get_vif_queues(local, sdata);
675
676 ieee80211_stop_queues_by_reason(&local->hw, queues,
677 IEEE80211_QUEUE_STOP_REASON_FLUSH,
678 false);
679
680 drv_flush(local, sdata, queues, drop);
681
682 ieee80211_wake_queues_by_reason(&local->hw, queues,
683 IEEE80211_QUEUE_STOP_REASON_FLUSH,
684 false);
685 }
686
687 void ieee80211_flush_queues(struct ieee80211_local *local,
688 struct ieee80211_sub_if_data *sdata, bool drop)
689 {
690 __ieee80211_flush_queues(local, sdata, 0, drop);
691 }
692
693 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
694 struct ieee80211_sub_if_data *sdata,
695 enum queue_stop_reason reason)
696 {
697 ieee80211_stop_queues_by_reason(&local->hw,
698 ieee80211_get_vif_queues(local, sdata),
699 reason, true);
700 }
701
702 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
703 struct ieee80211_sub_if_data *sdata,
704 enum queue_stop_reason reason)
705 {
706 ieee80211_wake_queues_by_reason(&local->hw,
707 ieee80211_get_vif_queues(local, sdata),
708 reason, true);
709 }
710
711 static void __iterate_interfaces(struct ieee80211_local *local,
712 u32 iter_flags,
713 void (*iterator)(void *data, u8 *mac,
714 struct ieee80211_vif *vif),
715 void *data)
716 {
717 struct ieee80211_sub_if_data *sdata;
718 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
719
720 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
721 switch (sdata->vif.type) {
722 case NL80211_IFTYPE_MONITOR:
723 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
724 continue;
725 break;
726 case NL80211_IFTYPE_AP_VLAN:
727 continue;
728 default:
729 break;
730 }
731 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
732 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
733 continue;
734 if (ieee80211_sdata_running(sdata) || !active_only)
735 iterator(data, sdata->vif.addr,
736 &sdata->vif);
737 }
738
739 sdata = rcu_dereference_check(local->monitor_sdata,
740 lockdep_is_held(&local->iflist_mtx) ||
741 lockdep_rtnl_is_held());
742 if (sdata &&
743 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
744 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
745 iterator(data, sdata->vif.addr, &sdata->vif);
746 }
747
748 void ieee80211_iterate_interfaces(
749 struct ieee80211_hw *hw, u32 iter_flags,
750 void (*iterator)(void *data, u8 *mac,
751 struct ieee80211_vif *vif),
752 void *data)
753 {
754 struct ieee80211_local *local = hw_to_local(hw);
755
756 mutex_lock(&local->iflist_mtx);
757 __iterate_interfaces(local, iter_flags, iterator, data);
758 mutex_unlock(&local->iflist_mtx);
759 }
760 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
761
762 void ieee80211_iterate_active_interfaces_atomic(
763 struct ieee80211_hw *hw, u32 iter_flags,
764 void (*iterator)(void *data, u8 *mac,
765 struct ieee80211_vif *vif),
766 void *data)
767 {
768 struct ieee80211_local *local = hw_to_local(hw);
769
770 rcu_read_lock();
771 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
772 iterator, data);
773 rcu_read_unlock();
774 }
775 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
776
777 void ieee80211_iterate_active_interfaces_rtnl(
778 struct ieee80211_hw *hw, u32 iter_flags,
779 void (*iterator)(void *data, u8 *mac,
780 struct ieee80211_vif *vif),
781 void *data)
782 {
783 struct ieee80211_local *local = hw_to_local(hw);
784
785 ASSERT_RTNL();
786
787 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
788 iterator, data);
789 }
790 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
791
792 static void __iterate_stations(struct ieee80211_local *local,
793 void (*iterator)(void *data,
794 struct ieee80211_sta *sta),
795 void *data)
796 {
797 struct sta_info *sta;
798
799 list_for_each_entry_rcu(sta, &local->sta_list, list) {
800 if (!sta->uploaded)
801 continue;
802
803 iterator(data, &sta->sta);
804 }
805 }
806
807 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
808 void (*iterator)(void *data,
809 struct ieee80211_sta *sta),
810 void *data)
811 {
812 struct ieee80211_local *local = hw_to_local(hw);
813
814 rcu_read_lock();
815 __iterate_stations(local, iterator, data);
816 rcu_read_unlock();
817 }
818 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
819
820 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
821 {
822 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
823
824 if (!ieee80211_sdata_running(sdata) ||
825 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
826 return NULL;
827 return &sdata->vif;
828 }
829 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
830
831 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
832 {
833 struct ieee80211_sub_if_data *sdata;
834
835 if (!vif)
836 return NULL;
837
838 sdata = vif_to_sdata(vif);
839
840 if (!ieee80211_sdata_running(sdata) ||
841 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
842 return NULL;
843
844 return &sdata->wdev;
845 }
846 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
847
848 /*
849 * Nothing should have been stuffed into the workqueue during
850 * the suspend->resume cycle. Since we can't check each caller
851 * of this function if we are already quiescing / suspended,
852 * check here and don't WARN since this can actually happen when
853 * the rx path (for example) is racing against __ieee80211_suspend
854 * and suspending / quiescing was set after the rx path checked
855 * them.
856 */
857 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
858 {
859 if (local->quiescing || (local->suspended && !local->resuming)) {
860 pr_warn("queueing ieee80211 work while going to suspend\n");
861 return false;
862 }
863
864 return true;
865 }
866
867 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
868 {
869 struct ieee80211_local *local = hw_to_local(hw);
870
871 if (!ieee80211_can_queue_work(local))
872 return;
873
874 queue_work(local->workqueue, work);
875 }
876 EXPORT_SYMBOL(ieee80211_queue_work);
877
878 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
879 struct delayed_work *dwork,
880 unsigned long delay)
881 {
882 struct ieee80211_local *local = hw_to_local(hw);
883
884 if (!ieee80211_can_queue_work(local))
885 return;
886
887 queue_delayed_work(local->workqueue, dwork, delay);
888 }
889 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
890
891 static u32
892 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
893 struct ieee802_11_elems *elems,
894 u64 filter, u32 crc,
895 const struct element *check_inherit)
896 {
897 const struct element *elem;
898 bool calc_crc = filter != 0;
899 DECLARE_BITMAP(seen_elems, 256);
900 const u8 *ie;
901
902 bitmap_zero(seen_elems, 256);
903
904 for_each_element(elem, start, len) {
905 bool elem_parse_failed;
906 u8 id = elem->id;
907 u8 elen = elem->datalen;
908 const u8 *pos = elem->data;
909
910 if (check_inherit &&
911 !cfg80211_is_element_inherited(elem,
912 check_inherit))
913 continue;
914
915 switch (id) {
916 case WLAN_EID_SSID:
917 case WLAN_EID_SUPP_RATES:
918 case WLAN_EID_FH_PARAMS:
919 case WLAN_EID_DS_PARAMS:
920 case WLAN_EID_CF_PARAMS:
921 case WLAN_EID_TIM:
922 case WLAN_EID_IBSS_PARAMS:
923 case WLAN_EID_CHALLENGE:
924 case WLAN_EID_RSN:
925 case WLAN_EID_ERP_INFO:
926 case WLAN_EID_EXT_SUPP_RATES:
927 case WLAN_EID_HT_CAPABILITY:
928 case WLAN_EID_HT_OPERATION:
929 case WLAN_EID_VHT_CAPABILITY:
930 case WLAN_EID_VHT_OPERATION:
931 case WLAN_EID_MESH_ID:
932 case WLAN_EID_MESH_CONFIG:
933 case WLAN_EID_PEER_MGMT:
934 case WLAN_EID_PREQ:
935 case WLAN_EID_PREP:
936 case WLAN_EID_PERR:
937 case WLAN_EID_RANN:
938 case WLAN_EID_CHANNEL_SWITCH:
939 case WLAN_EID_EXT_CHANSWITCH_ANN:
940 case WLAN_EID_COUNTRY:
941 case WLAN_EID_PWR_CONSTRAINT:
942 case WLAN_EID_TIMEOUT_INTERVAL:
943 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
944 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
945 case WLAN_EID_CHAN_SWITCH_PARAM:
946 case WLAN_EID_EXT_CAPABILITY:
947 case WLAN_EID_CHAN_SWITCH_TIMING:
948 case WLAN_EID_LINK_ID:
949 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
950 /*
951 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
952 * that if the content gets bigger it might be needed more than once
953 */
954 if (test_bit(id, seen_elems)) {
955 elems->parse_error = true;
956 continue;
957 }
958 break;
959 }
960
961 if (calc_crc && id < 64 && (filter & (1ULL << id)))
962 crc = crc32_be(crc, pos - 2, elen + 2);
963
964 elem_parse_failed = false;
965
966 switch (id) {
967 case WLAN_EID_LINK_ID:
968 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
969 elem_parse_failed = true;
970 break;
971 }
972 elems->lnk_id = (void *)(pos - 2);
973 break;
974 case WLAN_EID_CHAN_SWITCH_TIMING:
975 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
976 elem_parse_failed = true;
977 break;
978 }
979 elems->ch_sw_timing = (void *)pos;
980 break;
981 case WLAN_EID_EXT_CAPABILITY:
982 elems->ext_capab = pos;
983 elems->ext_capab_len = elen;
984 break;
985 case WLAN_EID_SSID:
986 elems->ssid = pos;
987 elems->ssid_len = elen;
988 break;
989 case WLAN_EID_SUPP_RATES:
990 elems->supp_rates = pos;
991 elems->supp_rates_len = elen;
992 break;
993 case WLAN_EID_DS_PARAMS:
994 if (elen >= 1)
995 elems->ds_params = pos;
996 else
997 elem_parse_failed = true;
998 break;
999 case WLAN_EID_TIM:
1000 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1001 elems->tim = (void *)pos;
1002 elems->tim_len = elen;
1003 } else
1004 elem_parse_failed = true;
1005 break;
1006 case WLAN_EID_CHALLENGE:
1007 elems->challenge = pos;
1008 elems->challenge_len = elen;
1009 break;
1010 case WLAN_EID_VENDOR_SPECIFIC:
1011 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1012 pos[2] == 0xf2) {
1013 /* Microsoft OUI (00:50:F2) */
1014
1015 if (calc_crc)
1016 crc = crc32_be(crc, pos - 2, elen + 2);
1017
1018 if (elen >= 5 && pos[3] == 2) {
1019 /* OUI Type 2 - WMM IE */
1020 if (pos[4] == 0) {
1021 elems->wmm_info = pos;
1022 elems->wmm_info_len = elen;
1023 } else if (pos[4] == 1) {
1024 elems->wmm_param = pos;
1025 elems->wmm_param_len = elen;
1026 }
1027 }
1028 }
1029 break;
1030 case WLAN_EID_RSN:
1031 elems->rsn = pos;
1032 elems->rsn_len = elen;
1033 break;
1034 case WLAN_EID_ERP_INFO:
1035 if (elen >= 1)
1036 elems->erp_info = pos;
1037 else
1038 elem_parse_failed = true;
1039 break;
1040 case WLAN_EID_EXT_SUPP_RATES:
1041 elems->ext_supp_rates = pos;
1042 elems->ext_supp_rates_len = elen;
1043 break;
1044 case WLAN_EID_HT_CAPABILITY:
1045 if (elen >= sizeof(struct ieee80211_ht_cap))
1046 elems->ht_cap_elem = (void *)pos;
1047 else
1048 elem_parse_failed = true;
1049 break;
1050 case WLAN_EID_HT_OPERATION:
1051 if (elen >= sizeof(struct ieee80211_ht_operation))
1052 elems->ht_operation = (void *)pos;
1053 else
1054 elem_parse_failed = true;
1055 break;
1056 case WLAN_EID_VHT_CAPABILITY:
1057 if (elen >= sizeof(struct ieee80211_vht_cap))
1058 elems->vht_cap_elem = (void *)pos;
1059 else
1060 elem_parse_failed = true;
1061 break;
1062 case WLAN_EID_VHT_OPERATION:
1063 if (elen >= sizeof(struct ieee80211_vht_operation))
1064 elems->vht_operation = (void *)pos;
1065 else
1066 elem_parse_failed = true;
1067 break;
1068 case WLAN_EID_OPMODE_NOTIF:
1069 if (elen > 0)
1070 elems->opmode_notif = pos;
1071 else
1072 elem_parse_failed = true;
1073 break;
1074 case WLAN_EID_MESH_ID:
1075 elems->mesh_id = pos;
1076 elems->mesh_id_len = elen;
1077 break;
1078 case WLAN_EID_MESH_CONFIG:
1079 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1080 elems->mesh_config = (void *)pos;
1081 else
1082 elem_parse_failed = true;
1083 break;
1084 case WLAN_EID_PEER_MGMT:
1085 elems->peering = pos;
1086 elems->peering_len = elen;
1087 break;
1088 case WLAN_EID_MESH_AWAKE_WINDOW:
1089 if (elen >= 2)
1090 elems->awake_window = (void *)pos;
1091 break;
1092 case WLAN_EID_PREQ:
1093 elems->preq = pos;
1094 elems->preq_len = elen;
1095 break;
1096 case WLAN_EID_PREP:
1097 elems->prep = pos;
1098 elems->prep_len = elen;
1099 break;
1100 case WLAN_EID_PERR:
1101 elems->perr = pos;
1102 elems->perr_len = elen;
1103 break;
1104 case WLAN_EID_RANN:
1105 if (elen >= sizeof(struct ieee80211_rann_ie))
1106 elems->rann = (void *)pos;
1107 else
1108 elem_parse_failed = true;
1109 break;
1110 case WLAN_EID_CHANNEL_SWITCH:
1111 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1112 elem_parse_failed = true;
1113 break;
1114 }
1115 elems->ch_switch_ie = (void *)pos;
1116 break;
1117 case WLAN_EID_EXT_CHANSWITCH_ANN:
1118 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1119 elem_parse_failed = true;
1120 break;
1121 }
1122 elems->ext_chansw_ie = (void *)pos;
1123 break;
1124 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1125 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1126 elem_parse_failed = true;
1127 break;
1128 }
1129 elems->sec_chan_offs = (void *)pos;
1130 break;
1131 case WLAN_EID_CHAN_SWITCH_PARAM:
1132 if (elen !=
1133 sizeof(*elems->mesh_chansw_params_ie)) {
1134 elem_parse_failed = true;
1135 break;
1136 }
1137 elems->mesh_chansw_params_ie = (void *)pos;
1138 break;
1139 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1140 if (!action ||
1141 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1142 elem_parse_failed = true;
1143 break;
1144 }
1145 elems->wide_bw_chansw_ie = (void *)pos;
1146 break;
1147 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1148 if (action) {
1149 elem_parse_failed = true;
1150 break;
1151 }
1152 /*
1153 * This is a bit tricky, but as we only care about
1154 * the wide bandwidth channel switch element, so
1155 * just parse it out manually.
1156 */
1157 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1158 pos, elen);
1159 if (ie) {
1160 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1161 elems->wide_bw_chansw_ie =
1162 (void *)(ie + 2);
1163 else
1164 elem_parse_failed = true;
1165 }
1166 break;
1167 case WLAN_EID_COUNTRY:
1168 elems->country_elem = pos;
1169 elems->country_elem_len = elen;
1170 break;
1171 case WLAN_EID_PWR_CONSTRAINT:
1172 if (elen != 1) {
1173 elem_parse_failed = true;
1174 break;
1175 }
1176 elems->pwr_constr_elem = pos;
1177 break;
1178 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1179 /* Lots of different options exist, but we only care
1180 * about the Dynamic Transmit Power Control element.
1181 * First check for the Cisco OUI, then for the DTPC
1182 * tag (0x00).
1183 */
1184 if (elen < 4) {
1185 elem_parse_failed = true;
1186 break;
1187 }
1188
1189 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1190 pos[2] != 0x96 || pos[3] != 0x00)
1191 break;
1192
1193 if (elen != 6) {
1194 elem_parse_failed = true;
1195 break;
1196 }
1197
1198 if (calc_crc)
1199 crc = crc32_be(crc, pos - 2, elen + 2);
1200
1201 elems->cisco_dtpc_elem = pos;
1202 break;
1203 case WLAN_EID_TIMEOUT_INTERVAL:
1204 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1205 elems->timeout_int = (void *)pos;
1206 else
1207 elem_parse_failed = true;
1208 break;
1209 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1210 if (elen >= sizeof(*elems->max_idle_period_ie))
1211 elems->max_idle_period_ie = (void *)pos;
1212 break;
1213 case WLAN_EID_EXTENSION:
1214 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1215 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1216 elems->mu_edca_param_set = (void *)&pos[1];
1217 if (calc_crc)
1218 crc = crc32_be(crc, pos - 2, elen + 2);
1219 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1220 elems->he_cap = (void *)&pos[1];
1221 elems->he_cap_len = elen - 1;
1222 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1223 elen >= sizeof(*elems->he_operation) &&
1224 elen >= ieee80211_he_oper_size(&pos[1])) {
1225 elems->he_operation = (void *)&pos[1];
1226 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1227 elems->uora_element = (void *)&pos[1];
1228 } else if (pos[0] ==
1229 WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1230 elen == 4) {
1231 elems->max_channel_switch_time = pos + 1;
1232 } else if (pos[0] ==
1233 WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1234 elen == 3) {
1235 elems->mbssid_config_ie = (void *)&pos[1];
1236 }
1237 break;
1238 default:
1239 break;
1240 }
1241
1242 if (elem_parse_failed)
1243 elems->parse_error = true;
1244 else
1245 __set_bit(id, seen_elems);
1246 }
1247
1248 if (!for_each_element_completed(elem, start, len))
1249 elems->parse_error = true;
1250
1251 return crc;
1252 }
1253
1254 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1255 struct ieee802_11_elems *elems,
1256 u8 *transmitter_bssid,
1257 u8 *bss_bssid,
1258 u8 *nontransmitted_profile)
1259 {
1260 const struct element *elem, *sub;
1261 size_t profile_len = 0;
1262 bool found = false;
1263
1264 if (!bss_bssid || !transmitter_bssid)
1265 return profile_len;
1266
1267 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1268 if (elem->datalen < 2)
1269 continue;
1270
1271 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1272 u8 new_bssid[ETH_ALEN];
1273 const u8 *index;
1274
1275 if (sub->id != 0 || sub->datalen < 4) {
1276 /* not a valid BSS profile */
1277 continue;
1278 }
1279
1280 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1281 sub->data[1] != 2) {
1282 /* The first element of the
1283 * Nontransmitted BSSID Profile is not
1284 * the Nontransmitted BSSID Capability
1285 * element.
1286 */
1287 continue;
1288 }
1289
1290 memset(nontransmitted_profile, 0, len);
1291 profile_len = cfg80211_merge_profile(start, len,
1292 elem,
1293 sub,
1294 nontransmitted_profile,
1295 len);
1296
1297 /* found a Nontransmitted BSSID Profile */
1298 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1299 nontransmitted_profile,
1300 profile_len);
1301 if (!index || index[1] < 1 || index[2] == 0) {
1302 /* Invalid MBSSID Index element */
1303 continue;
1304 }
1305
1306 cfg80211_gen_new_bssid(transmitter_bssid,
1307 elem->data[0],
1308 index[2],
1309 new_bssid);
1310 if (ether_addr_equal(new_bssid, bss_bssid)) {
1311 found = true;
1312 elems->bssid_index_len = index[1];
1313 elems->bssid_index = (void *)&index[2];
1314 break;
1315 }
1316 }
1317 }
1318
1319 return found ? profile_len : 0;
1320 }
1321
1322 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1323 struct ieee802_11_elems *elems,
1324 u64 filter, u32 crc, u8 *transmitter_bssid,
1325 u8 *bss_bssid)
1326 {
1327 const struct element *non_inherit = NULL;
1328 u8 *nontransmitted_profile;
1329 int nontransmitted_profile_len = 0;
1330
1331 memset(elems, 0, sizeof(*elems));
1332 elems->ie_start = start;
1333 elems->total_len = len;
1334
1335 nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1336 if (nontransmitted_profile) {
1337 nontransmitted_profile_len =
1338 ieee802_11_find_bssid_profile(start, len, elems,
1339 transmitter_bssid,
1340 bss_bssid,
1341 nontransmitted_profile);
1342 non_inherit =
1343 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1344 nontransmitted_profile,
1345 nontransmitted_profile_len);
1346 }
1347
1348 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1349 crc, non_inherit);
1350
1351 /* Override with nontransmitted profile, if found */
1352 if (nontransmitted_profile_len)
1353 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1354 nontransmitted_profile_len,
1355 action, elems, 0, 0, NULL);
1356
1357 if (elems->tim && !elems->parse_error) {
1358 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1359
1360 elems->dtim_period = tim_ie->dtim_period;
1361 elems->dtim_count = tim_ie->dtim_count;
1362 }
1363
1364 /* Override DTIM period and count if needed */
1365 if (elems->bssid_index &&
1366 elems->bssid_index_len >=
1367 offsetofend(struct ieee80211_bssid_index, dtim_period))
1368 elems->dtim_period = elems->bssid_index->dtim_period;
1369
1370 if (elems->bssid_index &&
1371 elems->bssid_index_len >=
1372 offsetofend(struct ieee80211_bssid_index, dtim_count))
1373 elems->dtim_count = elems->bssid_index->dtim_count;
1374
1375 kfree(nontransmitted_profile);
1376
1377 return crc;
1378 }
1379
1380 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1381 struct ieee80211_tx_queue_params
1382 *qparam, int ac)
1383 {
1384 struct ieee80211_chanctx_conf *chanctx_conf;
1385 const struct ieee80211_reg_rule *rrule;
1386 const struct ieee80211_wmm_ac *wmm_ac;
1387 u16 center_freq = 0;
1388
1389 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1390 sdata->vif.type != NL80211_IFTYPE_STATION)
1391 return;
1392
1393 rcu_read_lock();
1394 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1395 if (chanctx_conf)
1396 center_freq = chanctx_conf->def.chan->center_freq;
1397
1398 if (!center_freq) {
1399 rcu_read_unlock();
1400 return;
1401 }
1402
1403 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1404
1405 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1406 rcu_read_unlock();
1407 return;
1408 }
1409
1410 if (sdata->vif.type == NL80211_IFTYPE_AP)
1411 wmm_ac = &rrule->wmm_rule.ap[ac];
1412 else
1413 wmm_ac = &rrule->wmm_rule.client[ac];
1414 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1415 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1416 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1417 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1418 rcu_read_unlock();
1419 }
1420
1421 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1422 bool bss_notify, bool enable_qos)
1423 {
1424 struct ieee80211_local *local = sdata->local;
1425 struct ieee80211_tx_queue_params qparam;
1426 struct ieee80211_chanctx_conf *chanctx_conf;
1427 int ac;
1428 bool use_11b;
1429 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1430 int aCWmin, aCWmax;
1431
1432 if (!local->ops->conf_tx)
1433 return;
1434
1435 if (local->hw.queues < IEEE80211_NUM_ACS)
1436 return;
1437
1438 memset(&qparam, 0, sizeof(qparam));
1439
1440 rcu_read_lock();
1441 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1442 use_11b = (chanctx_conf &&
1443 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1444 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1445 rcu_read_unlock();
1446
1447 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1448
1449 /* Set defaults according to 802.11-2007 Table 7-37 */
1450 aCWmax = 1023;
1451 if (use_11b)
1452 aCWmin = 31;
1453 else
1454 aCWmin = 15;
1455
1456 /* Confiure old 802.11b/g medium access rules. */
1457 qparam.cw_max = aCWmax;
1458 qparam.cw_min = aCWmin;
1459 qparam.txop = 0;
1460 qparam.aifs = 2;
1461
1462 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1463 /* Update if QoS is enabled. */
1464 if (enable_qos) {
1465 switch (ac) {
1466 case IEEE80211_AC_BK:
1467 qparam.cw_max = aCWmax;
1468 qparam.cw_min = aCWmin;
1469 qparam.txop = 0;
1470 if (is_ocb)
1471 qparam.aifs = 9;
1472 else
1473 qparam.aifs = 7;
1474 break;
1475 /* never happens but let's not leave undefined */
1476 default:
1477 case IEEE80211_AC_BE:
1478 qparam.cw_max = aCWmax;
1479 qparam.cw_min = aCWmin;
1480 qparam.txop = 0;
1481 if (is_ocb)
1482 qparam.aifs = 6;
1483 else
1484 qparam.aifs = 3;
1485 break;
1486 case IEEE80211_AC_VI:
1487 qparam.cw_max = aCWmin;
1488 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1489 if (is_ocb)
1490 qparam.txop = 0;
1491 else if (use_11b)
1492 qparam.txop = 6016/32;
1493 else
1494 qparam.txop = 3008/32;
1495
1496 if (is_ocb)
1497 qparam.aifs = 3;
1498 else
1499 qparam.aifs = 2;
1500 break;
1501 case IEEE80211_AC_VO:
1502 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1503 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1504 if (is_ocb)
1505 qparam.txop = 0;
1506 else if (use_11b)
1507 qparam.txop = 3264/32;
1508 else
1509 qparam.txop = 1504/32;
1510 qparam.aifs = 2;
1511 break;
1512 }
1513 }
1514 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1515
1516 qparam.uapsd = false;
1517
1518 sdata->tx_conf[ac] = qparam;
1519 drv_conf_tx(local, sdata, ac, &qparam);
1520 }
1521
1522 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1523 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1524 sdata->vif.type != NL80211_IFTYPE_NAN) {
1525 sdata->vif.bss_conf.qos = enable_qos;
1526 if (bss_notify)
1527 ieee80211_bss_info_change_notify(sdata,
1528 BSS_CHANGED_QOS);
1529 }
1530 }
1531
1532 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1533 u16 transaction, u16 auth_alg, u16 status,
1534 const u8 *extra, size_t extra_len, const u8 *da,
1535 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1536 u32 tx_flags)
1537 {
1538 struct ieee80211_local *local = sdata->local;
1539 struct sk_buff *skb;
1540 struct ieee80211_mgmt *mgmt;
1541 int err;
1542
1543 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1544 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1545 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1546 if (!skb)
1547 return;
1548
1549 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1550
1551 mgmt = skb_put_zero(skb, 24 + 6);
1552 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1553 IEEE80211_STYPE_AUTH);
1554 memcpy(mgmt->da, da, ETH_ALEN);
1555 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1556 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1557 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1558 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1559 mgmt->u.auth.status_code = cpu_to_le16(status);
1560 if (extra)
1561 skb_put_data(skb, extra, extra_len);
1562
1563 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1564 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1565 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1566 WARN_ON(err);
1567 }
1568
1569 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1570 tx_flags;
1571 ieee80211_tx_skb(sdata, skb);
1572 }
1573
1574 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1575 const u8 *bssid, u16 stype, u16 reason,
1576 bool send_frame, u8 *frame_buf)
1577 {
1578 struct ieee80211_local *local = sdata->local;
1579 struct sk_buff *skb;
1580 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1581
1582 /* build frame */
1583 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1584 mgmt->duration = 0; /* initialize only */
1585 mgmt->seq_ctrl = 0; /* initialize only */
1586 memcpy(mgmt->da, bssid, ETH_ALEN);
1587 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1588 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1589 /* u.deauth.reason_code == u.disassoc.reason_code */
1590 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1591
1592 if (send_frame) {
1593 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1594 IEEE80211_DEAUTH_FRAME_LEN);
1595 if (!skb)
1596 return;
1597
1598 skb_reserve(skb, local->hw.extra_tx_headroom);
1599
1600 /* copy in frame */
1601 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1602
1603 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1604 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1605 IEEE80211_SKB_CB(skb)->flags |=
1606 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1607
1608 ieee80211_tx_skb(sdata, skb);
1609 }
1610 }
1611
1612 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1613 u8 *buffer, size_t buffer_len,
1614 const u8 *ie, size_t ie_len,
1615 enum nl80211_band band,
1616 u32 rate_mask,
1617 struct cfg80211_chan_def *chandef,
1618 size_t *offset, u32 flags)
1619 {
1620 struct ieee80211_supported_band *sband;
1621 const struct ieee80211_sta_he_cap *he_cap;
1622 u8 *pos = buffer, *end = buffer + buffer_len;
1623 size_t noffset;
1624 int supp_rates_len, i;
1625 u8 rates[32];
1626 int num_rates;
1627 int ext_rates_len;
1628 int shift;
1629 u32 rate_flags;
1630 bool have_80mhz = false;
1631
1632 *offset = 0;
1633
1634 sband = local->hw.wiphy->bands[band];
1635 if (WARN_ON_ONCE(!sband))
1636 return 0;
1637
1638 rate_flags = ieee80211_chandef_rate_flags(chandef);
1639 shift = ieee80211_chandef_get_shift(chandef);
1640
1641 num_rates = 0;
1642 for (i = 0; i < sband->n_bitrates; i++) {
1643 if ((BIT(i) & rate_mask) == 0)
1644 continue; /* skip rate */
1645 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1646 continue;
1647
1648 rates[num_rates++] =
1649 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1650 (1 << shift) * 5);
1651 }
1652
1653 supp_rates_len = min_t(int, num_rates, 8);
1654
1655 if (end - pos < 2 + supp_rates_len)
1656 goto out_err;
1657 *pos++ = WLAN_EID_SUPP_RATES;
1658 *pos++ = supp_rates_len;
1659 memcpy(pos, rates, supp_rates_len);
1660 pos += supp_rates_len;
1661
1662 /* insert "request information" if in custom IEs */
1663 if (ie && ie_len) {
1664 static const u8 before_extrates[] = {
1665 WLAN_EID_SSID,
1666 WLAN_EID_SUPP_RATES,
1667 WLAN_EID_REQUEST,
1668 };
1669 noffset = ieee80211_ie_split(ie, ie_len,
1670 before_extrates,
1671 ARRAY_SIZE(before_extrates),
1672 *offset);
1673 if (end - pos < noffset - *offset)
1674 goto out_err;
1675 memcpy(pos, ie + *offset, noffset - *offset);
1676 pos += noffset - *offset;
1677 *offset = noffset;
1678 }
1679
1680 ext_rates_len = num_rates - supp_rates_len;
1681 if (ext_rates_len > 0) {
1682 if (end - pos < 2 + ext_rates_len)
1683 goto out_err;
1684 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1685 *pos++ = ext_rates_len;
1686 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1687 pos += ext_rates_len;
1688 }
1689
1690 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1691 if (end - pos < 3)
1692 goto out_err;
1693 *pos++ = WLAN_EID_DS_PARAMS;
1694 *pos++ = 1;
1695 *pos++ = ieee80211_frequency_to_channel(
1696 chandef->chan->center_freq);
1697 }
1698
1699 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1700 goto done;
1701
1702 /* insert custom IEs that go before HT */
1703 if (ie && ie_len) {
1704 static const u8 before_ht[] = {
1705 /*
1706 * no need to list the ones split off already
1707 * (or generated here)
1708 */
1709 WLAN_EID_DS_PARAMS,
1710 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1711 };
1712 noffset = ieee80211_ie_split(ie, ie_len,
1713 before_ht, ARRAY_SIZE(before_ht),
1714 *offset);
1715 if (end - pos < noffset - *offset)
1716 goto out_err;
1717 memcpy(pos, ie + *offset, noffset - *offset);
1718 pos += noffset - *offset;
1719 *offset = noffset;
1720 }
1721
1722 if (sband->ht_cap.ht_supported) {
1723 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1724 goto out_err;
1725 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1726 sband->ht_cap.cap);
1727 }
1728
1729 /* insert custom IEs that go before VHT */
1730 if (ie && ie_len) {
1731 static const u8 before_vht[] = {
1732 /*
1733 * no need to list the ones split off already
1734 * (or generated here)
1735 */
1736 WLAN_EID_BSS_COEX_2040,
1737 WLAN_EID_EXT_CAPABILITY,
1738 WLAN_EID_SSID_LIST,
1739 WLAN_EID_CHANNEL_USAGE,
1740 WLAN_EID_INTERWORKING,
1741 WLAN_EID_MESH_ID,
1742 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1743 };
1744 noffset = ieee80211_ie_split(ie, ie_len,
1745 before_vht, ARRAY_SIZE(before_vht),
1746 *offset);
1747 if (end - pos < noffset - *offset)
1748 goto out_err;
1749 memcpy(pos, ie + *offset, noffset - *offset);
1750 pos += noffset - *offset;
1751 *offset = noffset;
1752 }
1753
1754 /* Check if any channel in this sband supports at least 80 MHz */
1755 for (i = 0; i < sband->n_channels; i++) {
1756 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1757 IEEE80211_CHAN_NO_80MHZ))
1758 continue;
1759
1760 have_80mhz = true;
1761 break;
1762 }
1763
1764 if (sband->vht_cap.vht_supported && have_80mhz) {
1765 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1766 goto out_err;
1767 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1768 sband->vht_cap.cap);
1769 }
1770
1771 /* insert custom IEs that go before HE */
1772 if (ie && ie_len) {
1773 static const u8 before_he[] = {
1774 /*
1775 * no need to list the ones split off before VHT
1776 * or generated here
1777 */
1778 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1779 WLAN_EID_AP_CSN,
1780 /* TODO: add 11ah/11aj/11ak elements */
1781 };
1782 noffset = ieee80211_ie_split(ie, ie_len,
1783 before_he, ARRAY_SIZE(before_he),
1784 *offset);
1785 if (end - pos < noffset - *offset)
1786 goto out_err;
1787 memcpy(pos, ie + *offset, noffset - *offset);
1788 pos += noffset - *offset;
1789 *offset = noffset;
1790 }
1791
1792 he_cap = ieee80211_get_he_sta_cap(sband);
1793 if (he_cap) {
1794 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1795 if (!pos)
1796 goto out_err;
1797 }
1798
1799 /*
1800 * If adding more here, adjust code in main.c
1801 * that calculates local->scan_ies_len.
1802 */
1803
1804 return pos - buffer;
1805 out_err:
1806 WARN_ONCE(1, "not enough space for preq IEs\n");
1807 done:
1808 return pos - buffer;
1809 }
1810
1811 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1812 size_t buffer_len,
1813 struct ieee80211_scan_ies *ie_desc,
1814 const u8 *ie, size_t ie_len,
1815 u8 bands_used, u32 *rate_masks,
1816 struct cfg80211_chan_def *chandef,
1817 u32 flags)
1818 {
1819 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1820 int i;
1821
1822 memset(ie_desc, 0, sizeof(*ie_desc));
1823
1824 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1825 if (bands_used & BIT(i)) {
1826 pos += ieee80211_build_preq_ies_band(local,
1827 buffer + pos,
1828 buffer_len - pos,
1829 ie, ie_len, i,
1830 rate_masks[i],
1831 chandef,
1832 &custom_ie_offset,
1833 flags);
1834 ie_desc->ies[i] = buffer + old_pos;
1835 ie_desc->len[i] = pos - old_pos;
1836 old_pos = pos;
1837 }
1838 }
1839
1840 /* add any remaining custom IEs */
1841 if (ie && ie_len) {
1842 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1843 "not enough space for preq custom IEs\n"))
1844 return pos;
1845 memcpy(buffer + pos, ie + custom_ie_offset,
1846 ie_len - custom_ie_offset);
1847 ie_desc->common_ies = buffer + pos;
1848 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1849 pos += ie_len - custom_ie_offset;
1850 }
1851
1852 return pos;
1853 };
1854
1855 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1856 const u8 *src, const u8 *dst,
1857 u32 ratemask,
1858 struct ieee80211_channel *chan,
1859 const u8 *ssid, size_t ssid_len,
1860 const u8 *ie, size_t ie_len,
1861 u32 flags)
1862 {
1863 struct ieee80211_local *local = sdata->local;
1864 struct cfg80211_chan_def chandef;
1865 struct sk_buff *skb;
1866 struct ieee80211_mgmt *mgmt;
1867 int ies_len;
1868 u32 rate_masks[NUM_NL80211_BANDS] = {};
1869 struct ieee80211_scan_ies dummy_ie_desc;
1870
1871 /*
1872 * Do not send DS Channel parameter for directed probe requests
1873 * in order to maximize the chance that we get a response. Some
1874 * badly-behaved APs don't respond when this parameter is included.
1875 */
1876 chandef.width = sdata->vif.bss_conf.chandef.width;
1877 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1878 chandef.chan = NULL;
1879 else
1880 chandef.chan = chan;
1881
1882 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1883 100 + ie_len);
1884 if (!skb)
1885 return NULL;
1886
1887 rate_masks[chan->band] = ratemask;
1888 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1889 skb_tailroom(skb), &dummy_ie_desc,
1890 ie, ie_len, BIT(chan->band),
1891 rate_masks, &chandef, flags);
1892 skb_put(skb, ies_len);
1893
1894 if (dst) {
1895 mgmt = (struct ieee80211_mgmt *) skb->data;
1896 memcpy(mgmt->da, dst, ETH_ALEN);
1897 memcpy(mgmt->bssid, dst, ETH_ALEN);
1898 }
1899
1900 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1901
1902 return skb;
1903 }
1904
1905 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1906 struct ieee802_11_elems *elems,
1907 enum nl80211_band band, u32 *basic_rates)
1908 {
1909 struct ieee80211_supported_band *sband;
1910 size_t num_rates;
1911 u32 supp_rates, rate_flags;
1912 int i, j, shift;
1913
1914 sband = sdata->local->hw.wiphy->bands[band];
1915 if (WARN_ON(!sband))
1916 return 1;
1917
1918 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1919 shift = ieee80211_vif_get_shift(&sdata->vif);
1920
1921 num_rates = sband->n_bitrates;
1922 supp_rates = 0;
1923 for (i = 0; i < elems->supp_rates_len +
1924 elems->ext_supp_rates_len; i++) {
1925 u8 rate = 0;
1926 int own_rate;
1927 bool is_basic;
1928 if (i < elems->supp_rates_len)
1929 rate = elems->supp_rates[i];
1930 else if (elems->ext_supp_rates)
1931 rate = elems->ext_supp_rates
1932 [i - elems->supp_rates_len];
1933 own_rate = 5 * (rate & 0x7f);
1934 is_basic = !!(rate & 0x80);
1935
1936 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1937 continue;
1938
1939 for (j = 0; j < num_rates; j++) {
1940 int brate;
1941 if ((rate_flags & sband->bitrates[j].flags)
1942 != rate_flags)
1943 continue;
1944
1945 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1946 1 << shift);
1947
1948 if (brate == own_rate) {
1949 supp_rates |= BIT(j);
1950 if (basic_rates && is_basic)
1951 *basic_rates |= BIT(j);
1952 }
1953 }
1954 }
1955 return supp_rates;
1956 }
1957
1958 void ieee80211_stop_device(struct ieee80211_local *local)
1959 {
1960 ieee80211_led_radio(local, false);
1961 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1962
1963 cancel_work_sync(&local->reconfig_filter);
1964
1965 flush_workqueue(local->workqueue);
1966 drv_stop(local);
1967 }
1968
1969 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1970 bool aborted)
1971 {
1972 /* It's possible that we don't handle the scan completion in
1973 * time during suspend, so if it's still marked as completed
1974 * here, queue the work and flush it to clean things up.
1975 * Instead of calling the worker function directly here, we
1976 * really queue it to avoid potential races with other flows
1977 * scheduling the same work.
1978 */
1979 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1980 /* If coming from reconfiguration failure, abort the scan so
1981 * we don't attempt to continue a partial HW scan - which is
1982 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1983 * completed scan, and a 5 GHz portion is still pending.
1984 */
1985 if (aborted)
1986 set_bit(SCAN_ABORTED, &local->scanning);
1987 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1988 flush_delayed_work(&local->scan_work);
1989 }
1990 }
1991
1992 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1993 {
1994 struct ieee80211_sub_if_data *sdata;
1995 struct ieee80211_chanctx *ctx;
1996
1997 /*
1998 * We get here if during resume the device can't be restarted properly.
1999 * We might also get here if this happens during HW reset, which is a
2000 * slightly different situation and we need to drop all connections in
2001 * the latter case.
2002 *
2003 * Ask cfg80211 to turn off all interfaces, this will result in more
2004 * warnings but at least we'll then get into a clean stopped state.
2005 */
2006
2007 local->resuming = false;
2008 local->suspended = false;
2009 local->in_reconfig = false;
2010
2011 ieee80211_flush_completed_scan(local, true);
2012
2013 /* scheduled scan clearly can't be running any more, but tell
2014 * cfg80211 and clear local state
2015 */
2016 ieee80211_sched_scan_end(local);
2017
2018 list_for_each_entry(sdata, &local->interfaces, list)
2019 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2020
2021 /* Mark channel contexts as not being in the driver any more to avoid
2022 * removing them from the driver during the shutdown process...
2023 */
2024 mutex_lock(&local->chanctx_mtx);
2025 list_for_each_entry(ctx, &local->chanctx_list, list)
2026 ctx->driver_present = false;
2027 mutex_unlock(&local->chanctx_mtx);
2028
2029 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2030 }
2031
2032 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2033 struct ieee80211_sub_if_data *sdata)
2034 {
2035 struct ieee80211_chanctx_conf *conf;
2036 struct ieee80211_chanctx *ctx;
2037
2038 if (!local->use_chanctx)
2039 return;
2040
2041 mutex_lock(&local->chanctx_mtx);
2042 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2043 lockdep_is_held(&local->chanctx_mtx));
2044 if (conf) {
2045 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2046 drv_assign_vif_chanctx(local, sdata, ctx);
2047 }
2048 mutex_unlock(&local->chanctx_mtx);
2049 }
2050
2051 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2052 {
2053 struct ieee80211_local *local = sdata->local;
2054 struct sta_info *sta;
2055
2056 /* add STAs back */
2057 mutex_lock(&local->sta_mtx);
2058 list_for_each_entry(sta, &local->sta_list, list) {
2059 enum ieee80211_sta_state state;
2060
2061 if (!sta->uploaded || sta->sdata != sdata)
2062 continue;
2063
2064 for (state = IEEE80211_STA_NOTEXIST;
2065 state < sta->sta_state; state++)
2066 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2067 state + 1));
2068 }
2069 mutex_unlock(&local->sta_mtx);
2070 }
2071
2072 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2073 {
2074 struct cfg80211_nan_func *func, **funcs;
2075 int res, id, i = 0;
2076
2077 res = drv_start_nan(sdata->local, sdata,
2078 &sdata->u.nan.conf);
2079 if (WARN_ON(res))
2080 return res;
2081
2082 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2083 sizeof(*funcs),
2084 GFP_KERNEL);
2085 if (!funcs)
2086 return -ENOMEM;
2087
2088 /* Add all the functions:
2089 * This is a little bit ugly. We need to call a potentially sleeping
2090 * callback for each NAN function, so we can't hold the spinlock.
2091 */
2092 spin_lock_bh(&sdata->u.nan.func_lock);
2093
2094 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2095 funcs[i++] = func;
2096
2097 spin_unlock_bh(&sdata->u.nan.func_lock);
2098
2099 for (i = 0; funcs[i]; i++) {
2100 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2101 if (WARN_ON(res))
2102 ieee80211_nan_func_terminated(&sdata->vif,
2103 funcs[i]->instance_id,
2104 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2105 GFP_KERNEL);
2106 }
2107
2108 kfree(funcs);
2109
2110 return 0;
2111 }
2112
2113 int ieee80211_reconfig(struct ieee80211_local *local)
2114 {
2115 struct ieee80211_hw *hw = &local->hw;
2116 struct ieee80211_sub_if_data *sdata;
2117 struct ieee80211_chanctx *ctx;
2118 struct sta_info *sta;
2119 int res, i;
2120 bool reconfig_due_to_wowlan = false;
2121 struct ieee80211_sub_if_data *sched_scan_sdata;
2122 struct cfg80211_sched_scan_request *sched_scan_req;
2123 bool sched_scan_stopped = false;
2124 bool suspended = local->suspended;
2125
2126 /* nothing to do if HW shouldn't run */
2127 if (!local->open_count)
2128 goto wake_up;
2129
2130 #ifdef CONFIG_PM
2131 if (suspended)
2132 local->resuming = true;
2133
2134 if (local->wowlan) {
2135 /*
2136 * In the wowlan case, both mac80211 and the device
2137 * are functional when the resume op is called, so
2138 * clear local->suspended so the device could operate
2139 * normally (e.g. pass rx frames).
2140 */
2141 local->suspended = false;
2142 res = drv_resume(local);
2143 local->wowlan = false;
2144 if (res < 0) {
2145 local->resuming = false;
2146 return res;
2147 }
2148 if (res == 0)
2149 goto wake_up;
2150 WARN_ON(res > 1);
2151 /*
2152 * res is 1, which means the driver requested
2153 * to go through a regular reset on wakeup.
2154 * restore local->suspended in this case.
2155 */
2156 reconfig_due_to_wowlan = true;
2157 local->suspended = true;
2158 }
2159 #endif
2160
2161 /*
2162 * In case of hw_restart during suspend (without wowlan),
2163 * cancel restart work, as we are reconfiguring the device
2164 * anyway.
2165 * Note that restart_work is scheduled on a frozen workqueue,
2166 * so we can't deadlock in this case.
2167 */
2168 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2169 cancel_work_sync(&local->restart_work);
2170
2171 local->started = false;
2172
2173 /*
2174 * Upon resume hardware can sometimes be goofy due to
2175 * various platform / driver / bus issues, so restarting
2176 * the device may at times not work immediately. Propagate
2177 * the error.
2178 */
2179 res = drv_start(local);
2180 if (res) {
2181 if (suspended)
2182 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2183 else
2184 WARN(1, "Hardware became unavailable during restart.\n");
2185 ieee80211_handle_reconfig_failure(local);
2186 return res;
2187 }
2188
2189 /* setup fragmentation threshold */
2190 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2191
2192 /* setup RTS threshold */
2193 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2194
2195 /* reset coverage class */
2196 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2197
2198 ieee80211_led_radio(local, true);
2199 ieee80211_mod_tpt_led_trig(local,
2200 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2201
2202 /* add interfaces */
2203 sdata = rtnl_dereference(local->monitor_sdata);
2204 if (sdata) {
2205 /* in HW restart it exists already */
2206 WARN_ON(local->resuming);
2207 res = drv_add_interface(local, sdata);
2208 if (WARN_ON(res)) {
2209 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2210 synchronize_net();
2211 kfree(sdata);
2212 }
2213 }
2214
2215 list_for_each_entry(sdata, &local->interfaces, list) {
2216 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2217 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2218 ieee80211_sdata_running(sdata)) {
2219 res = drv_add_interface(local, sdata);
2220 if (WARN_ON(res))
2221 break;
2222 }
2223 }
2224
2225 /* If adding any of the interfaces failed above, roll back and
2226 * report failure.
2227 */
2228 if (res) {
2229 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2230 list)
2231 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2232 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2233 ieee80211_sdata_running(sdata))
2234 drv_remove_interface(local, sdata);
2235 ieee80211_handle_reconfig_failure(local);
2236 return res;
2237 }
2238
2239 /* add channel contexts */
2240 if (local->use_chanctx) {
2241 mutex_lock(&local->chanctx_mtx);
2242 list_for_each_entry(ctx, &local->chanctx_list, list)
2243 if (ctx->replace_state !=
2244 IEEE80211_CHANCTX_REPLACES_OTHER)
2245 WARN_ON(drv_add_chanctx(local, ctx));
2246 mutex_unlock(&local->chanctx_mtx);
2247
2248 sdata = rtnl_dereference(local->monitor_sdata);
2249 if (sdata && ieee80211_sdata_running(sdata))
2250 ieee80211_assign_chanctx(local, sdata);
2251 }
2252
2253 /* reconfigure hardware */
2254 ieee80211_hw_config(local, ~0);
2255
2256 ieee80211_configure_filter(local);
2257
2258 /* Finally also reconfigure all the BSS information */
2259 list_for_each_entry(sdata, &local->interfaces, list) {
2260 u32 changed;
2261
2262 if (!ieee80211_sdata_running(sdata))
2263 continue;
2264
2265 ieee80211_assign_chanctx(local, sdata);
2266
2267 switch (sdata->vif.type) {
2268 case NL80211_IFTYPE_AP_VLAN:
2269 case NL80211_IFTYPE_MONITOR:
2270 break;
2271 case NL80211_IFTYPE_ADHOC:
2272 if (sdata->vif.bss_conf.ibss_joined)
2273 WARN_ON(drv_join_ibss(local, sdata));
2274 /* fall through */
2275 default:
2276 ieee80211_reconfig_stations(sdata);
2277 /* fall through */
2278 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2279 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2280 drv_conf_tx(local, sdata, i,
2281 &sdata->tx_conf[i]);
2282 break;
2283 }
2284
2285 /* common change flags for all interface types */
2286 changed = BSS_CHANGED_ERP_CTS_PROT |
2287 BSS_CHANGED_ERP_PREAMBLE |
2288 BSS_CHANGED_ERP_SLOT |
2289 BSS_CHANGED_HT |
2290 BSS_CHANGED_BASIC_RATES |
2291 BSS_CHANGED_BEACON_INT |
2292 BSS_CHANGED_BSSID |
2293 BSS_CHANGED_CQM |
2294 BSS_CHANGED_QOS |
2295 BSS_CHANGED_IDLE |
2296 BSS_CHANGED_TXPOWER |
2297 BSS_CHANGED_MCAST_RATE;
2298
2299 if (sdata->vif.mu_mimo_owner)
2300 changed |= BSS_CHANGED_MU_GROUPS;
2301
2302 switch (sdata->vif.type) {
2303 case NL80211_IFTYPE_STATION:
2304 changed |= BSS_CHANGED_ASSOC |
2305 BSS_CHANGED_ARP_FILTER |
2306 BSS_CHANGED_PS;
2307
2308 /* Re-send beacon info report to the driver */
2309 if (sdata->u.mgd.have_beacon)
2310 changed |= BSS_CHANGED_BEACON_INFO;
2311
2312 if (sdata->vif.bss_conf.max_idle_period ||
2313 sdata->vif.bss_conf.protected_keep_alive)
2314 changed |= BSS_CHANGED_KEEP_ALIVE;
2315
2316 sdata_lock(sdata);
2317 ieee80211_bss_info_change_notify(sdata, changed);
2318 sdata_unlock(sdata);
2319 break;
2320 case NL80211_IFTYPE_OCB:
2321 changed |= BSS_CHANGED_OCB;
2322 ieee80211_bss_info_change_notify(sdata, changed);
2323 break;
2324 case NL80211_IFTYPE_ADHOC:
2325 changed |= BSS_CHANGED_IBSS;
2326 /* fall through */
2327 case NL80211_IFTYPE_AP:
2328 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2329
2330 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2331 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2332 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2333 changed |= BSS_CHANGED_FTM_RESPONDER;
2334
2335 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2336 changed |= BSS_CHANGED_AP_PROBE_RESP;
2337
2338 if (rcu_access_pointer(sdata->u.ap.beacon))
2339 drv_start_ap(local, sdata);
2340 }
2341
2342 /* fall through */
2343 case NL80211_IFTYPE_MESH_POINT:
2344 if (sdata->vif.bss_conf.enable_beacon) {
2345 changed |= BSS_CHANGED_BEACON |
2346 BSS_CHANGED_BEACON_ENABLED;
2347 ieee80211_bss_info_change_notify(sdata, changed);
2348 }
2349 break;
2350 case NL80211_IFTYPE_NAN:
2351 res = ieee80211_reconfig_nan(sdata);
2352 if (res < 0) {
2353 ieee80211_handle_reconfig_failure(local);
2354 return res;
2355 }
2356 break;
2357 case NL80211_IFTYPE_WDS:
2358 case NL80211_IFTYPE_AP_VLAN:
2359 case NL80211_IFTYPE_MONITOR:
2360 case NL80211_IFTYPE_P2P_DEVICE:
2361 /* nothing to do */
2362 break;
2363 case NL80211_IFTYPE_UNSPECIFIED:
2364 case NUM_NL80211_IFTYPES:
2365 case NL80211_IFTYPE_P2P_CLIENT:
2366 case NL80211_IFTYPE_P2P_GO:
2367 WARN_ON(1);
2368 break;
2369 }
2370 }
2371
2372 ieee80211_recalc_ps(local);
2373
2374 /*
2375 * The sta might be in psm against the ap (e.g. because
2376 * this was the state before a hw restart), so we
2377 * explicitly send a null packet in order to make sure
2378 * it'll sync against the ap (and get out of psm).
2379 */
2380 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2381 list_for_each_entry(sdata, &local->interfaces, list) {
2382 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2383 continue;
2384 if (!sdata->u.mgd.associated)
2385 continue;
2386
2387 ieee80211_send_nullfunc(local, sdata, false);
2388 }
2389 }
2390
2391 /* APs are now beaconing, add back stations */
2392 mutex_lock(&local->sta_mtx);
2393 list_for_each_entry(sta, &local->sta_list, list) {
2394 enum ieee80211_sta_state state;
2395
2396 if (!sta->uploaded)
2397 continue;
2398
2399 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2400 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2401 continue;
2402
2403 for (state = IEEE80211_STA_NOTEXIST;
2404 state < sta->sta_state; state++)
2405 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2406 state + 1));
2407 }
2408 mutex_unlock(&local->sta_mtx);
2409
2410 /* add back keys */
2411 list_for_each_entry(sdata, &local->interfaces, list)
2412 ieee80211_reset_crypto_tx_tailroom(sdata);
2413
2414 list_for_each_entry(sdata, &local->interfaces, list)
2415 if (ieee80211_sdata_running(sdata))
2416 ieee80211_enable_keys(sdata);
2417
2418 /* Reconfigure sched scan if it was interrupted by FW restart */
2419 mutex_lock(&local->mtx);
2420 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2421 lockdep_is_held(&local->mtx));
2422 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2423 lockdep_is_held(&local->mtx));
2424 if (sched_scan_sdata && sched_scan_req)
2425 /*
2426 * Sched scan stopped, but we don't want to report it. Instead,
2427 * we're trying to reschedule. However, if more than one scan
2428 * plan was set, we cannot reschedule since we don't know which
2429 * scan plan was currently running (and some scan plans may have
2430 * already finished).
2431 */
2432 if (sched_scan_req->n_scan_plans > 1 ||
2433 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2434 sched_scan_req)) {
2435 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2436 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2437 sched_scan_stopped = true;
2438 }
2439 mutex_unlock(&local->mtx);
2440
2441 if (sched_scan_stopped)
2442 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2443
2444 wake_up:
2445
2446 if (local->monitors == local->open_count && local->monitors > 0)
2447 ieee80211_add_virtual_monitor(local);
2448
2449 /*
2450 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2451 * sessions can be established after a resume.
2452 *
2453 * Also tear down aggregation sessions since reconfiguring
2454 * them in a hardware restart scenario is not easily done
2455 * right now, and the hardware will have lost information
2456 * about the sessions, but we and the AP still think they
2457 * are active. This is really a workaround though.
2458 */
2459 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2460 mutex_lock(&local->sta_mtx);
2461
2462 list_for_each_entry(sta, &local->sta_list, list) {
2463 if (!local->resuming)
2464 ieee80211_sta_tear_down_BA_sessions(
2465 sta, AGG_STOP_LOCAL_REQUEST);
2466 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2467 }
2468
2469 mutex_unlock(&local->sta_mtx);
2470 }
2471
2472 if (local->in_reconfig) {
2473 local->in_reconfig = false;
2474 barrier();
2475
2476 /* Restart deferred ROCs */
2477 mutex_lock(&local->mtx);
2478 ieee80211_start_next_roc(local);
2479 mutex_unlock(&local->mtx);
2480
2481 /* Requeue all works */
2482 list_for_each_entry(sdata, &local->interfaces, list)
2483 ieee80211_queue_work(&local->hw, &sdata->work);
2484 }
2485
2486 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2487 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2488 false);
2489
2490 /*
2491 * If this is for hw restart things are still running.
2492 * We may want to change that later, however.
2493 */
2494 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2495 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2496
2497 if (!suspended)
2498 return 0;
2499
2500 #ifdef CONFIG_PM
2501 /* first set suspended false, then resuming */
2502 local->suspended = false;
2503 mb();
2504 local->resuming = false;
2505
2506 ieee80211_flush_completed_scan(local, false);
2507
2508 if (local->open_count && !reconfig_due_to_wowlan)
2509 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2510
2511 list_for_each_entry(sdata, &local->interfaces, list) {
2512 if (!ieee80211_sdata_running(sdata))
2513 continue;
2514 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2515 ieee80211_sta_restart(sdata);
2516 }
2517
2518 mod_timer(&local->sta_cleanup, jiffies + 1);
2519 #else
2520 WARN_ON(1);
2521 #endif
2522
2523 return 0;
2524 }
2525
2526 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2527 {
2528 struct ieee80211_sub_if_data *sdata;
2529 struct ieee80211_local *local;
2530 struct ieee80211_key *key;
2531
2532 if (WARN_ON(!vif))
2533 return;
2534
2535 sdata = vif_to_sdata(vif);
2536 local = sdata->local;
2537
2538 if (WARN_ON(!local->resuming))
2539 return;
2540
2541 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2542 return;
2543
2544 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2545
2546 mutex_lock(&local->key_mtx);
2547 list_for_each_entry(key, &sdata->key_list, list)
2548 key->flags |= KEY_FLAG_TAINTED;
2549 mutex_unlock(&local->key_mtx);
2550 }
2551 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2552
2553 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2554 {
2555 struct ieee80211_local *local = sdata->local;
2556 struct ieee80211_chanctx_conf *chanctx_conf;
2557 struct ieee80211_chanctx *chanctx;
2558
2559 mutex_lock(&local->chanctx_mtx);
2560
2561 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2562 lockdep_is_held(&local->chanctx_mtx));
2563
2564 /*
2565 * This function can be called from a work, thus it may be possible
2566 * that the chanctx_conf is removed (due to a disconnection, for
2567 * example).
2568 * So nothing should be done in such case.
2569 */
2570 if (!chanctx_conf)
2571 goto unlock;
2572
2573 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2574 ieee80211_recalc_smps_chanctx(local, chanctx);
2575 unlock:
2576 mutex_unlock(&local->chanctx_mtx);
2577 }
2578
2579 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2580 {
2581 struct ieee80211_local *local = sdata->local;
2582 struct ieee80211_chanctx_conf *chanctx_conf;
2583 struct ieee80211_chanctx *chanctx;
2584
2585 mutex_lock(&local->chanctx_mtx);
2586
2587 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2588 lockdep_is_held(&local->chanctx_mtx));
2589
2590 if (WARN_ON_ONCE(!chanctx_conf))
2591 goto unlock;
2592
2593 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2594 ieee80211_recalc_chanctx_min_def(local, chanctx);
2595 unlock:
2596 mutex_unlock(&local->chanctx_mtx);
2597 }
2598
2599 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2600 {
2601 size_t pos = offset;
2602
2603 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2604 pos += 2 + ies[pos + 1];
2605
2606 return pos;
2607 }
2608
2609 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2610 int rssi_min_thold,
2611 int rssi_max_thold)
2612 {
2613 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2614
2615 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2616 return;
2617
2618 /*
2619 * Scale up threshold values before storing it, as the RSSI averaging
2620 * algorithm uses a scaled up value as well. Change this scaling
2621 * factor if the RSSI averaging algorithm changes.
2622 */
2623 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2624 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2625 }
2626
2627 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2628 int rssi_min_thold,
2629 int rssi_max_thold)
2630 {
2631 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2632
2633 WARN_ON(rssi_min_thold == rssi_max_thold ||
2634 rssi_min_thold > rssi_max_thold);
2635
2636 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2637 rssi_max_thold);
2638 }
2639 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2640
2641 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2642 {
2643 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2644
2645 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2646 }
2647 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2648
2649 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2650 u16 cap)
2651 {
2652 __le16 tmp;
2653
2654 *pos++ = WLAN_EID_HT_CAPABILITY;
2655 *pos++ = sizeof(struct ieee80211_ht_cap);
2656 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2657
2658 /* capability flags */
2659 tmp = cpu_to_le16(cap);
2660 memcpy(pos, &tmp, sizeof(u16));
2661 pos += sizeof(u16);
2662
2663 /* AMPDU parameters */
2664 *pos++ = ht_cap->ampdu_factor |
2665 (ht_cap->ampdu_density <<
2666 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2667
2668 /* MCS set */
2669 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2670 pos += sizeof(ht_cap->mcs);
2671
2672 /* extended capabilities */
2673 pos += sizeof(__le16);
2674
2675 /* BF capabilities */
2676 pos += sizeof(__le32);
2677
2678 /* antenna selection */
2679 pos += sizeof(u8);
2680
2681 return pos;
2682 }
2683
2684 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2685 u32 cap)
2686 {
2687 __le32 tmp;
2688
2689 *pos++ = WLAN_EID_VHT_CAPABILITY;
2690 *pos++ = sizeof(struct ieee80211_vht_cap);
2691 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2692
2693 /* capability flags */
2694 tmp = cpu_to_le32(cap);
2695 memcpy(pos, &tmp, sizeof(u32));
2696 pos += sizeof(u32);
2697
2698 /* VHT MCS set */
2699 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2700 pos += sizeof(vht_cap->vht_mcs);
2701
2702 return pos;
2703 }
2704
2705 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2706 const struct ieee80211_sta_he_cap *he_cap,
2707 u8 *end)
2708 {
2709 u8 n;
2710 u8 ie_len;
2711 u8 *orig_pos = pos;
2712
2713 /* Make sure we have place for the IE */
2714 /*
2715 * TODO: the 1 added is because this temporarily is under the EXTENSION
2716 * IE. Get rid of it when it moves.
2717 */
2718 if (!he_cap)
2719 return orig_pos;
2720
2721 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2722 ie_len = 2 + 1 +
2723 sizeof(he_cap->he_cap_elem) + n +
2724 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2725 he_cap->he_cap_elem.phy_cap_info);
2726
2727 if ((end - pos) < ie_len)
2728 return orig_pos;
2729
2730 *pos++ = WLAN_EID_EXTENSION;
2731 pos++; /* We'll set the size later below */
2732 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2733
2734 /* Fixed data */
2735 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2736 pos += sizeof(he_cap->he_cap_elem);
2737
2738 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2739 pos += n;
2740
2741 /* Check if PPE Threshold should be present */
2742 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2743 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2744 goto end;
2745
2746 /*
2747 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2748 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2749 */
2750 n = hweight8(he_cap->ppe_thres[0] &
2751 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2752 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2753 IEEE80211_PPE_THRES_NSS_POS));
2754
2755 /*
2756 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2757 * total size.
2758 */
2759 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2760 n = DIV_ROUND_UP(n, 8);
2761
2762 /* Copy PPE Thresholds */
2763 memcpy(pos, &he_cap->ppe_thres, n);
2764 pos += n;
2765
2766 end:
2767 orig_pos[1] = (pos - orig_pos) - 2;
2768 return pos;
2769 }
2770
2771 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2772 const struct cfg80211_chan_def *chandef,
2773 u16 prot_mode, bool rifs_mode)
2774 {
2775 struct ieee80211_ht_operation *ht_oper;
2776 /* Build HT Information */
2777 *pos++ = WLAN_EID_HT_OPERATION;
2778 *pos++ = sizeof(struct ieee80211_ht_operation);
2779 ht_oper = (struct ieee80211_ht_operation *)pos;
2780 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2781 chandef->chan->center_freq);
2782 switch (chandef->width) {
2783 case NL80211_CHAN_WIDTH_160:
2784 case NL80211_CHAN_WIDTH_80P80:
2785 case NL80211_CHAN_WIDTH_80:
2786 case NL80211_CHAN_WIDTH_40:
2787 if (chandef->center_freq1 > chandef->chan->center_freq)
2788 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2789 else
2790 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2791 break;
2792 default:
2793 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2794 break;
2795 }
2796 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2797 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2798 chandef->width != NL80211_CHAN_WIDTH_20)
2799 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2800
2801 if (rifs_mode)
2802 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2803
2804 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2805 ht_oper->stbc_param = 0x0000;
2806
2807 /* It seems that Basic MCS set and Supported MCS set
2808 are identical for the first 10 bytes */
2809 memset(&ht_oper->basic_set, 0, 16);
2810 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2811
2812 return pos + sizeof(struct ieee80211_ht_operation);
2813 }
2814
2815 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2816 const struct cfg80211_chan_def *chandef)
2817 {
2818 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2819 *pos++ = 3; /* IE length */
2820 /* New channel width */
2821 switch (chandef->width) {
2822 case NL80211_CHAN_WIDTH_80:
2823 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2824 break;
2825 case NL80211_CHAN_WIDTH_160:
2826 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2827 break;
2828 case NL80211_CHAN_WIDTH_80P80:
2829 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2830 break;
2831 default:
2832 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2833 }
2834
2835 /* new center frequency segment 0 */
2836 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2837 /* new center frequency segment 1 */
2838 if (chandef->center_freq2)
2839 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2840 else
2841 *pos++ = 0;
2842 }
2843
2844 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2845 const struct cfg80211_chan_def *chandef)
2846 {
2847 struct ieee80211_vht_operation *vht_oper;
2848
2849 *pos++ = WLAN_EID_VHT_OPERATION;
2850 *pos++ = sizeof(struct ieee80211_vht_operation);
2851 vht_oper = (struct ieee80211_vht_operation *)pos;
2852 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2853 chandef->center_freq1);
2854 if (chandef->center_freq2)
2855 vht_oper->center_freq_seg1_idx =
2856 ieee80211_frequency_to_channel(chandef->center_freq2);
2857 else
2858 vht_oper->center_freq_seg1_idx = 0x00;
2859
2860 switch (chandef->width) {
2861 case NL80211_CHAN_WIDTH_160:
2862 /*
2863 * Convert 160 MHz channel width to new style as interop
2864 * workaround.
2865 */
2866 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2867 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2868 if (chandef->chan->center_freq < chandef->center_freq1)
2869 vht_oper->center_freq_seg0_idx -= 8;
2870 else
2871 vht_oper->center_freq_seg0_idx += 8;
2872 break;
2873 case NL80211_CHAN_WIDTH_80P80:
2874 /*
2875 * Convert 80+80 MHz channel width to new style as interop
2876 * workaround.
2877 */
2878 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2879 break;
2880 case NL80211_CHAN_WIDTH_80:
2881 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2882 break;
2883 default:
2884 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2885 break;
2886 }
2887
2888 /* don't require special VHT peer rates */
2889 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2890
2891 return pos + sizeof(struct ieee80211_vht_operation);
2892 }
2893
2894 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2895 struct cfg80211_chan_def *chandef)
2896 {
2897 enum nl80211_channel_type channel_type;
2898
2899 if (!ht_oper)
2900 return false;
2901
2902 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2903 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2904 channel_type = NL80211_CHAN_HT20;
2905 break;
2906 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2907 channel_type = NL80211_CHAN_HT40PLUS;
2908 break;
2909 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2910 channel_type = NL80211_CHAN_HT40MINUS;
2911 break;
2912 default:
2913 channel_type = NL80211_CHAN_NO_HT;
2914 return false;
2915 }
2916
2917 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2918 return true;
2919 }
2920
2921 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2922 const struct ieee80211_vht_operation *oper,
2923 const struct ieee80211_ht_operation *htop,
2924 struct cfg80211_chan_def *chandef)
2925 {
2926 struct cfg80211_chan_def new = *chandef;
2927 int cf0, cf1;
2928 int ccfs0, ccfs1, ccfs2;
2929 int ccf0, ccf1;
2930
2931 if (!oper || !htop)
2932 return false;
2933
2934 ccfs0 = oper->center_freq_seg0_idx;
2935 ccfs1 = oper->center_freq_seg1_idx;
2936 ccfs2 = (le16_to_cpu(htop->operation_mode) &
2937 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2938 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2939
2940 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2941 ccf0 = ccfs0;
2942 ccf1 = ccfs1;
2943 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2944 ccf1 = ccfs2;
2945
2946 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2947 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2948
2949 switch (oper->chan_width) {
2950 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2951 /* just use HT information directly */
2952 break;
2953 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2954 new.width = NL80211_CHAN_WIDTH_80;
2955 new.center_freq1 = cf0;
2956 /* If needed, adjust based on the newer interop workaround. */
2957 if (ccf1) {
2958 unsigned int diff;
2959
2960 diff = abs(ccf1 - ccf0);
2961 if (diff == 8) {
2962 new.width = NL80211_CHAN_WIDTH_160;
2963 new.center_freq1 = cf1;
2964 } else if (diff > 8) {
2965 new.width = NL80211_CHAN_WIDTH_80P80;
2966 new.center_freq2 = cf1;
2967 }
2968 }
2969 break;
2970 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2971 /* deprecated encoding */
2972 new.width = NL80211_CHAN_WIDTH_160;
2973 new.center_freq1 = cf0;
2974 break;
2975 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2976 /* deprecated encoding */
2977 new.width = NL80211_CHAN_WIDTH_80P80;
2978 new.center_freq1 = cf0;
2979 new.center_freq2 = cf1;
2980 break;
2981 default:
2982 return false;
2983 }
2984
2985 if (!cfg80211_chandef_valid(&new))
2986 return false;
2987
2988 *chandef = new;
2989 return true;
2990 }
2991
2992 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2993 const struct ieee80211_supported_band *sband,
2994 const u8 *srates, int srates_len, u32 *rates)
2995 {
2996 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2997 int shift = ieee80211_chandef_get_shift(chandef);
2998 struct ieee80211_rate *br;
2999 int brate, rate, i, j, count = 0;
3000
3001 *rates = 0;
3002
3003 for (i = 0; i < srates_len; i++) {
3004 rate = srates[i] & 0x7f;
3005
3006 for (j = 0; j < sband->n_bitrates; j++) {
3007 br = &sband->bitrates[j];
3008 if ((rate_flags & br->flags) != rate_flags)
3009 continue;
3010
3011 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3012 if (brate == rate) {
3013 *rates |= BIT(j);
3014 count++;
3015 break;
3016 }
3017 }
3018 }
3019 return count;
3020 }
3021
3022 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3023 struct sk_buff *skb, bool need_basic,
3024 enum nl80211_band band)
3025 {
3026 struct ieee80211_local *local = sdata->local;
3027 struct ieee80211_supported_band *sband;
3028 int rate, shift;
3029 u8 i, rates, *pos;
3030 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3031 u32 rate_flags;
3032
3033 shift = ieee80211_vif_get_shift(&sdata->vif);
3034 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3035 sband = local->hw.wiphy->bands[band];
3036 rates = 0;
3037 for (i = 0; i < sband->n_bitrates; i++) {
3038 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3039 continue;
3040 rates++;
3041 }
3042 if (rates > 8)
3043 rates = 8;
3044
3045 if (skb_tailroom(skb) < rates + 2)
3046 return -ENOMEM;
3047
3048 pos = skb_put(skb, rates + 2);
3049 *pos++ = WLAN_EID_SUPP_RATES;
3050 *pos++ = rates;
3051 for (i = 0; i < rates; i++) {
3052 u8 basic = 0;
3053 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3054 continue;
3055
3056 if (need_basic && basic_rates & BIT(i))
3057 basic = 0x80;
3058 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3059 5 * (1 << shift));
3060 *pos++ = basic | (u8) rate;
3061 }
3062
3063 return 0;
3064 }
3065
3066 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3067 struct sk_buff *skb, bool need_basic,
3068 enum nl80211_band band)
3069 {
3070 struct ieee80211_local *local = sdata->local;
3071 struct ieee80211_supported_band *sband;
3072 int rate, shift;
3073 u8 i, exrates, *pos;
3074 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3075 u32 rate_flags;
3076
3077 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3078 shift = ieee80211_vif_get_shift(&sdata->vif);
3079
3080 sband = local->hw.wiphy->bands[band];
3081 exrates = 0;
3082 for (i = 0; i < sband->n_bitrates; i++) {
3083 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3084 continue;
3085 exrates++;
3086 }
3087
3088 if (exrates > 8)
3089 exrates -= 8;
3090 else
3091 exrates = 0;
3092
3093 if (skb_tailroom(skb) < exrates + 2)
3094 return -ENOMEM;
3095
3096 if (exrates) {
3097 pos = skb_put(skb, exrates + 2);
3098 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3099 *pos++ = exrates;
3100 for (i = 8; i < sband->n_bitrates; i++) {
3101 u8 basic = 0;
3102 if ((rate_flags & sband->bitrates[i].flags)
3103 != rate_flags)
3104 continue;
3105 if (need_basic && basic_rates & BIT(i))
3106 basic = 0x80;
3107 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3108 5 * (1 << shift));
3109 *pos++ = basic | (u8) rate;
3110 }
3111 }
3112 return 0;
3113 }
3114
3115 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3116 {
3117 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3119
3120 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3121 /* non-managed type inferfaces */
3122 return 0;
3123 }
3124 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3125 }
3126 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3127
3128 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3129 {
3130 if (!mcs)
3131 return 1;
3132
3133 /* TODO: consider rx_highest */
3134
3135 if (mcs->rx_mask[3])
3136 return 4;
3137 if (mcs->rx_mask[2])
3138 return 3;
3139 if (mcs->rx_mask[1])
3140 return 2;
3141 return 1;
3142 }
3143
3144 /**
3145 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3146 * @local: mac80211 hw info struct
3147 * @status: RX status
3148 * @mpdu_len: total MPDU length (including FCS)
3149 * @mpdu_offset: offset into MPDU to calculate timestamp at
3150 *
3151 * This function calculates the RX timestamp at the given MPDU offset, taking
3152 * into account what the RX timestamp was. An offset of 0 will just normalize
3153 * the timestamp to TSF at beginning of MPDU reception.
3154 */
3155 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3156 struct ieee80211_rx_status *status,
3157 unsigned int mpdu_len,
3158 unsigned int mpdu_offset)
3159 {
3160 u64 ts = status->mactime;
3161 struct rate_info ri;
3162 u16 rate;
3163
3164 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3165 return 0;
3166
3167 memset(&ri, 0, sizeof(ri));
3168
3169 ri.bw = status->bw;
3170
3171 /* Fill cfg80211 rate info */
3172 switch (status->encoding) {
3173 case RX_ENC_HT:
3174 ri.mcs = status->rate_idx;
3175 ri.flags |= RATE_INFO_FLAGS_MCS;
3176 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3177 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3178 break;
3179 case RX_ENC_VHT:
3180 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3181 ri.mcs = status->rate_idx;
3182 ri.nss = status->nss;
3183 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3184 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3185 break;
3186 default:
3187 WARN_ON(1);
3188 /* fall through */
3189 case RX_ENC_LEGACY: {
3190 struct ieee80211_supported_band *sband;
3191 int shift = 0;
3192 int bitrate;
3193
3194 switch (status->bw) {
3195 case RATE_INFO_BW_10:
3196 shift = 1;
3197 break;
3198 case RATE_INFO_BW_5:
3199 shift = 2;
3200 break;
3201 }
3202
3203 sband = local->hw.wiphy->bands[status->band];
3204 bitrate = sband->bitrates[status->rate_idx].bitrate;
3205 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3206
3207 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3208 /* TODO: handle HT/VHT preambles */
3209 if (status->band == NL80211_BAND_5GHZ) {
3210 ts += 20 << shift;
3211 mpdu_offset += 2;
3212 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3213 ts += 96;
3214 } else {
3215 ts += 192;
3216 }
3217 }
3218 break;
3219 }
3220 }
3221
3222 rate = cfg80211_calculate_bitrate(&ri);
3223 if (WARN_ONCE(!rate,
3224 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3225 (unsigned long long)status->flag, status->rate_idx,
3226 status->nss))
3227 return 0;
3228
3229 /* rewind from end of MPDU */
3230 if (status->flag & RX_FLAG_MACTIME_END)
3231 ts -= mpdu_len * 8 * 10 / rate;
3232
3233 ts += mpdu_offset * 8 * 10 / rate;
3234
3235 return ts;
3236 }
3237
3238 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3239 {
3240 struct ieee80211_sub_if_data *sdata;
3241 struct cfg80211_chan_def chandef;
3242
3243 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3244 ASSERT_RTNL();
3245
3246 mutex_lock(&local->mtx);
3247 list_for_each_entry(sdata, &local->interfaces, list) {
3248 /* it might be waiting for the local->mtx, but then
3249 * by the time it gets it, sdata->wdev.cac_started
3250 * will no longer be true
3251 */
3252 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3253
3254 if (sdata->wdev.cac_started) {
3255 chandef = sdata->vif.bss_conf.chandef;
3256 ieee80211_vif_release_channel(sdata);
3257 cfg80211_cac_event(sdata->dev,
3258 &chandef,
3259 NL80211_RADAR_CAC_ABORTED,
3260 GFP_KERNEL);
3261 }
3262 }
3263 mutex_unlock(&local->mtx);
3264 }
3265
3266 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3267 {
3268 struct ieee80211_local *local =
3269 container_of(work, struct ieee80211_local, radar_detected_work);
3270 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3271 struct ieee80211_chanctx *ctx;
3272 int num_chanctx = 0;
3273
3274 mutex_lock(&local->chanctx_mtx);
3275 list_for_each_entry(ctx, &local->chanctx_list, list) {
3276 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3277 continue;
3278
3279 num_chanctx++;
3280 chandef = ctx->conf.def;
3281 }
3282 mutex_unlock(&local->chanctx_mtx);
3283
3284 rtnl_lock();
3285 ieee80211_dfs_cac_cancel(local);
3286 rtnl_unlock();
3287
3288 if (num_chanctx > 1)
3289 /* XXX: multi-channel is not supported yet */
3290 WARN_ON(1);
3291 else
3292 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3293 }
3294
3295 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3296 {
3297 struct ieee80211_local *local = hw_to_local(hw);
3298
3299 trace_api_radar_detected(local);
3300
3301 schedule_work(&local->radar_detected_work);
3302 }
3303 EXPORT_SYMBOL(ieee80211_radar_detected);
3304
3305 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3306 {
3307 u32 ret;
3308 int tmp;
3309
3310 switch (c->width) {
3311 case NL80211_CHAN_WIDTH_20:
3312 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3313 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3314 break;
3315 case NL80211_CHAN_WIDTH_40:
3316 c->width = NL80211_CHAN_WIDTH_20;
3317 c->center_freq1 = c->chan->center_freq;
3318 ret = IEEE80211_STA_DISABLE_40MHZ |
3319 IEEE80211_STA_DISABLE_VHT;
3320 break;
3321 case NL80211_CHAN_WIDTH_80:
3322 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3323 /* n_P40 */
3324 tmp /= 2;
3325 /* freq_P40 */
3326 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3327 c->width = NL80211_CHAN_WIDTH_40;
3328 ret = IEEE80211_STA_DISABLE_VHT;
3329 break;
3330 case NL80211_CHAN_WIDTH_80P80:
3331 c->center_freq2 = 0;
3332 c->width = NL80211_CHAN_WIDTH_80;
3333 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3334 IEEE80211_STA_DISABLE_160MHZ;
3335 break;
3336 case NL80211_CHAN_WIDTH_160:
3337 /* n_P20 */
3338 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3339 /* n_P80 */
3340 tmp /= 4;
3341 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3342 c->width = NL80211_CHAN_WIDTH_80;
3343 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3344 IEEE80211_STA_DISABLE_160MHZ;
3345 break;
3346 default:
3347 case NL80211_CHAN_WIDTH_20_NOHT:
3348 WARN_ON_ONCE(1);
3349 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3350 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3351 break;
3352 case NL80211_CHAN_WIDTH_5:
3353 case NL80211_CHAN_WIDTH_10:
3354 WARN_ON_ONCE(1);
3355 /* keep c->width */
3356 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3357 break;
3358 }
3359
3360 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3361
3362 return ret;
3363 }
3364
3365 /*
3366 * Returns true if smps_mode_new is strictly more restrictive than
3367 * smps_mode_old.
3368 */
3369 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3370 enum ieee80211_smps_mode smps_mode_new)
3371 {
3372 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3373 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3374 return false;
3375
3376 switch (smps_mode_old) {
3377 case IEEE80211_SMPS_STATIC:
3378 return false;
3379 case IEEE80211_SMPS_DYNAMIC:
3380 return smps_mode_new == IEEE80211_SMPS_STATIC;
3381 case IEEE80211_SMPS_OFF:
3382 return smps_mode_new != IEEE80211_SMPS_OFF;
3383 default:
3384 WARN_ON(1);
3385 }
3386
3387 return false;
3388 }
3389
3390 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3391 struct cfg80211_csa_settings *csa_settings)
3392 {
3393 struct sk_buff *skb;
3394 struct ieee80211_mgmt *mgmt;
3395 struct ieee80211_local *local = sdata->local;
3396 int freq;
3397 int hdr_len = offsetofend(struct ieee80211_mgmt,
3398 u.action.u.chan_switch);
3399 u8 *pos;
3400
3401 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3402 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3403 return -EOPNOTSUPP;
3404
3405 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3406 5 + /* channel switch announcement element */
3407 3 + /* secondary channel offset element */
3408 5 + /* wide bandwidth channel switch announcement */
3409 8); /* mesh channel switch parameters element */
3410 if (!skb)
3411 return -ENOMEM;
3412
3413 skb_reserve(skb, local->tx_headroom);
3414 mgmt = skb_put_zero(skb, hdr_len);
3415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3416 IEEE80211_STYPE_ACTION);
3417
3418 eth_broadcast_addr(mgmt->da);
3419 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3420 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3421 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3422 } else {
3423 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3424 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3425 }
3426 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3427 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3428 pos = skb_put(skb, 5);
3429 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3430 *pos++ = 3; /* IE length */
3431 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3432 freq = csa_settings->chandef.chan->center_freq;
3433 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3434 *pos++ = csa_settings->count; /* count */
3435
3436 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3437 enum nl80211_channel_type ch_type;
3438
3439 skb_put(skb, 3);
3440 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3441 *pos++ = 1; /* IE length */
3442 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3443 if (ch_type == NL80211_CHAN_HT40PLUS)
3444 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3445 else
3446 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3447 }
3448
3449 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3450 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3451
3452 skb_put(skb, 8);
3453 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3454 *pos++ = 6; /* IE length */
3455 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3456 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3457 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3458 *pos++ |= csa_settings->block_tx ?
3459 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3460 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3461 pos += 2;
3462 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3463 pos += 2;
3464 }
3465
3466 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3467 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3468 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3469 skb_put(skb, 5);
3470 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3471 }
3472
3473 ieee80211_tx_skb(sdata, skb);
3474 return 0;
3475 }
3476
3477 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3478 {
3479 return !(cs == NULL || cs->cipher == 0 ||
3480 cs->hdr_len < cs->pn_len + cs->pn_off ||
3481 cs->hdr_len <= cs->key_idx_off ||
3482 cs->key_idx_shift > 7 ||
3483 cs->key_idx_mask == 0);
3484 }
3485
3486 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3487 {
3488 int i;
3489
3490 /* Ensure we have enough iftype bitmap space for all iftype values */
3491 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3492
3493 for (i = 0; i < n; i++)
3494 if (!ieee80211_cs_valid(&cs[i]))
3495 return false;
3496
3497 return true;
3498 }
3499
3500 const struct ieee80211_cipher_scheme *
3501 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3502 enum nl80211_iftype iftype)
3503 {
3504 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3505 int n = local->hw.n_cipher_schemes;
3506 int i;
3507 const struct ieee80211_cipher_scheme *cs = NULL;
3508
3509 for (i = 0; i < n; i++) {
3510 if (l[i].cipher == cipher) {
3511 cs = &l[i];
3512 break;
3513 }
3514 }
3515
3516 if (!cs || !(cs->iftype & BIT(iftype)))
3517 return NULL;
3518
3519 return cs;
3520 }
3521
3522 int ieee80211_cs_headroom(struct ieee80211_local *local,
3523 struct cfg80211_crypto_settings *crypto,
3524 enum nl80211_iftype iftype)
3525 {
3526 const struct ieee80211_cipher_scheme *cs;
3527 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3528 int i;
3529
3530 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3531 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3532 iftype);
3533
3534 if (cs && headroom < cs->hdr_len)
3535 headroom = cs->hdr_len;
3536 }
3537
3538 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3539 if (cs && headroom < cs->hdr_len)
3540 headroom = cs->hdr_len;
3541
3542 return headroom;
3543 }
3544
3545 static bool
3546 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3547 {
3548 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3549 int skip;
3550
3551 if (end > 0)
3552 return false;
3553
3554 /* One shot NOA */
3555 if (data->count[i] == 1)
3556 return false;
3557
3558 if (data->desc[i].interval == 0)
3559 return false;
3560
3561 /* End time is in the past, check for repetitions */
3562 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3563 if (data->count[i] < 255) {
3564 if (data->count[i] <= skip) {
3565 data->count[i] = 0;
3566 return false;
3567 }
3568
3569 data->count[i] -= skip;
3570 }
3571
3572 data->desc[i].start += skip * data->desc[i].interval;
3573
3574 return true;
3575 }
3576
3577 static bool
3578 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3579 s32 *offset)
3580 {
3581 bool ret = false;
3582 int i;
3583
3584 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3585 s32 cur;
3586
3587 if (!data->count[i])
3588 continue;
3589
3590 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3591 ret = true;
3592
3593 cur = data->desc[i].start - tsf;
3594 if (cur > *offset)
3595 continue;
3596
3597 cur = data->desc[i].start + data->desc[i].duration - tsf;
3598 if (cur > *offset)
3599 *offset = cur;
3600 }
3601
3602 return ret;
3603 }
3604
3605 static u32
3606 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3607 {
3608 s32 offset = 0;
3609 int tries = 0;
3610 /*
3611 * arbitrary limit, used to avoid infinite loops when combined NoA
3612 * descriptors cover the full time period.
3613 */
3614 int max_tries = 5;
3615
3616 ieee80211_extend_absent_time(data, tsf, &offset);
3617 do {
3618 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3619 break;
3620
3621 tries++;
3622 } while (tries < max_tries);
3623
3624 return offset;
3625 }
3626
3627 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3628 {
3629 u32 next_offset = BIT(31) - 1;
3630 int i;
3631
3632 data->absent = 0;
3633 data->has_next_tsf = false;
3634 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3635 s32 start;
3636
3637 if (!data->count[i])
3638 continue;
3639
3640 ieee80211_extend_noa_desc(data, tsf, i);
3641 start = data->desc[i].start - tsf;
3642 if (start <= 0)
3643 data->absent |= BIT(i);
3644
3645 if (next_offset > start)
3646 next_offset = start;
3647
3648 data->has_next_tsf = true;
3649 }
3650
3651 if (data->absent)
3652 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3653
3654 data->next_tsf = tsf + next_offset;
3655 }
3656 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3657
3658 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3659 struct ieee80211_noa_data *data, u32 tsf)
3660 {
3661 int ret = 0;
3662 int i;
3663
3664 memset(data, 0, sizeof(*data));
3665
3666 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3667 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3668
3669 if (!desc->count || !desc->duration)
3670 continue;
3671
3672 data->count[i] = desc->count;
3673 data->desc[i].start = le32_to_cpu(desc->start_time);
3674 data->desc[i].duration = le32_to_cpu(desc->duration);
3675 data->desc[i].interval = le32_to_cpu(desc->interval);
3676
3677 if (data->count[i] > 1 &&
3678 data->desc[i].interval < data->desc[i].duration)
3679 continue;
3680
3681 ieee80211_extend_noa_desc(data, tsf, i);
3682 ret++;
3683 }
3684
3685 if (ret)
3686 ieee80211_update_p2p_noa(data, tsf);
3687
3688 return ret;
3689 }
3690 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3691
3692 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3693 struct ieee80211_sub_if_data *sdata)
3694 {
3695 u64 tsf = drv_get_tsf(local, sdata);
3696 u64 dtim_count = 0;
3697 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3698 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3699 struct ps_data *ps;
3700 u8 bcns_from_dtim;
3701
3702 if (tsf == -1ULL || !beacon_int || !dtim_period)
3703 return;
3704
3705 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3706 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3707 if (!sdata->bss)
3708 return;
3709
3710 ps = &sdata->bss->ps;
3711 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3712 ps = &sdata->u.mesh.ps;
3713 } else {
3714 return;
3715 }
3716
3717 /*
3718 * actually finds last dtim_count, mac80211 will update in
3719 * __beacon_add_tim().
3720 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3721 */
3722 do_div(tsf, beacon_int);
3723 bcns_from_dtim = do_div(tsf, dtim_period);
3724 /* just had a DTIM */
3725 if (!bcns_from_dtim)
3726 dtim_count = 0;
3727 else
3728 dtim_count = dtim_period - bcns_from_dtim;
3729
3730 ps->dtim_count = dtim_count;
3731 }
3732
3733 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3734 struct ieee80211_chanctx *ctx)
3735 {
3736 struct ieee80211_sub_if_data *sdata;
3737 u8 radar_detect = 0;
3738
3739 lockdep_assert_held(&local->chanctx_mtx);
3740
3741 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3742 return 0;
3743
3744 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3745 if (sdata->reserved_radar_required)
3746 radar_detect |= BIT(sdata->reserved_chandef.width);
3747
3748 /*
3749 * An in-place reservation context should not have any assigned vifs
3750 * until it replaces the other context.
3751 */
3752 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3753 !list_empty(&ctx->assigned_vifs));
3754
3755 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3756 if (sdata->radar_required)
3757 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3758
3759 return radar_detect;
3760 }
3761
3762 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3763 const struct cfg80211_chan_def *chandef,
3764 enum ieee80211_chanctx_mode chanmode,
3765 u8 radar_detect)
3766 {
3767 struct ieee80211_local *local = sdata->local;
3768 struct ieee80211_sub_if_data *sdata_iter;
3769 enum nl80211_iftype iftype = sdata->wdev.iftype;
3770 struct ieee80211_chanctx *ctx;
3771 int total = 1;
3772 struct iface_combination_params params = {
3773 .radar_detect = radar_detect,
3774 };
3775
3776 lockdep_assert_held(&local->chanctx_mtx);
3777
3778 if (WARN_ON(hweight32(radar_detect) > 1))
3779 return -EINVAL;
3780
3781 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3782 !chandef->chan))
3783 return -EINVAL;
3784
3785 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3786 return -EINVAL;
3787
3788 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3789 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3790 /*
3791 * always passing this is harmless, since it'll be the
3792 * same value that cfg80211 finds if it finds the same
3793 * interface ... and that's always allowed
3794 */
3795 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3796 }
3797
3798 /* Always allow software iftypes */
3799 if (local->hw.wiphy->software_iftypes & BIT(iftype) ||
3800 (iftype == NL80211_IFTYPE_AP_VLAN &&
3801 local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) {
3802 if (radar_detect)
3803 return -EINVAL;
3804 return 0;
3805 }
3806
3807 if (chandef)
3808 params.num_different_channels = 1;
3809
3810 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3811 params.iftype_num[iftype] = 1;
3812
3813 list_for_each_entry(ctx, &local->chanctx_list, list) {
3814 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3815 continue;
3816 params.radar_detect |=
3817 ieee80211_chanctx_radar_detect(local, ctx);
3818 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3819 params.num_different_channels++;
3820 continue;
3821 }
3822 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3823 cfg80211_chandef_compatible(chandef,
3824 &ctx->conf.def))
3825 continue;
3826 params.num_different_channels++;
3827 }
3828
3829 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3830 struct wireless_dev *wdev_iter;
3831
3832 wdev_iter = &sdata_iter->wdev;
3833
3834 if (sdata_iter == sdata ||
3835 !ieee80211_sdata_running(sdata_iter) ||
3836 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3837 continue;
3838
3839 params.iftype_num[wdev_iter->iftype]++;
3840 total++;
3841 }
3842
3843 if (total == 1 && !params.radar_detect)
3844 return 0;
3845
3846 return cfg80211_check_combinations(local->hw.wiphy, &params);
3847 }
3848
3849 static void
3850 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3851 void *data)
3852 {
3853 u32 *max_num_different_channels = data;
3854
3855 *max_num_different_channels = max(*max_num_different_channels,
3856 c->num_different_channels);
3857 }
3858
3859 int ieee80211_max_num_channels(struct ieee80211_local *local)
3860 {
3861 struct ieee80211_sub_if_data *sdata;
3862 struct ieee80211_chanctx *ctx;
3863 u32 max_num_different_channels = 1;
3864 int err;
3865 struct iface_combination_params params = {0};
3866
3867 lockdep_assert_held(&local->chanctx_mtx);
3868
3869 list_for_each_entry(ctx, &local->chanctx_list, list) {
3870 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3871 continue;
3872
3873 params.num_different_channels++;
3874
3875 params.radar_detect |=
3876 ieee80211_chanctx_radar_detect(local, ctx);
3877 }
3878
3879 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3880 params.iftype_num[sdata->wdev.iftype]++;
3881
3882 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3883 ieee80211_iter_max_chans,
3884 &max_num_different_channels);
3885 if (err < 0)
3886 return err;
3887
3888 return max_num_different_channels;
3889 }
3890
3891 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3892 {
3893 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3894 *buf++ = 7; /* len */
3895 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3896 *buf++ = 0x50;
3897 *buf++ = 0xf2;
3898 *buf++ = 2; /* WME */
3899 *buf++ = 0; /* WME info */
3900 *buf++ = 1; /* WME ver */
3901 *buf++ = qosinfo; /* U-APSD no in use */
3902
3903 return buf;
3904 }
3905
3906 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3907 unsigned long *frame_cnt,
3908 unsigned long *byte_cnt)
3909 {
3910 struct txq_info *txqi = to_txq_info(txq);
3911 u32 frag_cnt = 0, frag_bytes = 0;
3912 struct sk_buff *skb;
3913
3914 skb_queue_walk(&txqi->frags, skb) {
3915 frag_cnt++;
3916 frag_bytes += skb->len;
3917 }
3918
3919 if (frame_cnt)
3920 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3921
3922 if (byte_cnt)
3923 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3924 }
3925 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3926
3927 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3928 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3929 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3930 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3931 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3932 };
Linux with added FPC-III support