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Linux 5.7.7
[linux/fpc-iii.git] / net / mac80211 / util.c
blob20436c86b9bf0050bbc5c03309026282bb632a58
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) 2018-2020 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
43 local = wiphy_priv(wiphy);
44 return &local->hw;
45 }
46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
47
48 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
49 {
50 struct sk_buff *skb;
51 struct ieee80211_hdr *hdr;
52
53 skb_queue_walk(&tx->skbs, skb) {
54 hdr = (struct ieee80211_hdr *) skb->data;
55 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
56 }
57 }
58
59 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
60 int rate, int erp, int short_preamble,
61 int shift)
62 {
63 int dur;
64
65 /* calculate duration (in microseconds, rounded up to next higher
66 * integer if it includes a fractional microsecond) to send frame of
67 * len bytes (does not include FCS) at the given rate. Duration will
68 * also include SIFS.
69 *
70 * rate is in 100 kbps, so divident is multiplied by 10 in the
71 * DIV_ROUND_UP() operations.
72 *
73 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
74 * is assumed to be 0 otherwise.
75 */
76
77 if (band == NL80211_BAND_5GHZ || erp) {
78 /*
79 * OFDM:
80 *
81 * N_DBPS = DATARATE x 4
82 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
83 * (16 = SIGNAL time, 6 = tail bits)
84 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
85 *
86 * T_SYM = 4 usec
87 * 802.11a - 18.5.2: aSIFSTime = 16 usec
88 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
89 * signal ext = 6 usec
90 */
91 dur = 16; /* SIFS + signal ext */
92 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
93 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
94
95 /* IEEE 802.11-2012 18.3.2.4: all values above are:
96 * * times 4 for 5 MHz
97 * * times 2 for 10 MHz
98 */
99 dur *= 1 << shift;
100
101 /* rates should already consider the channel bandwidth,
102 * don't apply divisor again.
103 */
104 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
105 4 * rate); /* T_SYM x N_SYM */
106 } else {
107 /*
108 * 802.11b or 802.11g with 802.11b compatibility:
109 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
110 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
111 *
112 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
113 * aSIFSTime = 10 usec
114 * aPreambleLength = 144 usec or 72 usec with short preamble
115 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
116 */
117 dur = 10; /* aSIFSTime = 10 usec */
118 dur += short_preamble ? (72 + 24) : (144 + 48);
119
120 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
121 }
122
123 return dur;
124 }
125
126 /* Exported duration function for driver use */
127 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
128 struct ieee80211_vif *vif,
129 enum nl80211_band band,
130 size_t frame_len,
131 struct ieee80211_rate *rate)
132 {
133 struct ieee80211_sub_if_data *sdata;
134 u16 dur;
135 int erp, shift = 0;
136 bool short_preamble = false;
137
138 erp = 0;
139 if (vif) {
140 sdata = vif_to_sdata(vif);
141 short_preamble = sdata->vif.bss_conf.use_short_preamble;
142 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
143 erp = rate->flags & IEEE80211_RATE_ERP_G;
144 shift = ieee80211_vif_get_shift(vif);
145 }
146
147 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
148 short_preamble, shift);
149
150 return cpu_to_le16(dur);
151 }
152 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
153
154 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
155 struct ieee80211_vif *vif, size_t frame_len,
156 const struct ieee80211_tx_info *frame_txctl)
157 {
158 struct ieee80211_local *local = hw_to_local(hw);
159 struct ieee80211_rate *rate;
160 struct ieee80211_sub_if_data *sdata;
161 bool short_preamble;
162 int erp, shift = 0, bitrate;
163 u16 dur;
164 struct ieee80211_supported_band *sband;
165
166 sband = local->hw.wiphy->bands[frame_txctl->band];
167
168 short_preamble = false;
169
170 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
171
172 erp = 0;
173 if (vif) {
174 sdata = vif_to_sdata(vif);
175 short_preamble = sdata->vif.bss_conf.use_short_preamble;
176 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
177 erp = rate->flags & IEEE80211_RATE_ERP_G;
178 shift = ieee80211_vif_get_shift(vif);
179 }
180
181 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
182
183 /* CTS duration */
184 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
185 erp, short_preamble, shift);
186 /* Data frame duration */
187 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
188 erp, short_preamble, shift);
189 /* ACK duration */
190 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
191 erp, short_preamble, shift);
192
193 return cpu_to_le16(dur);
194 }
195 EXPORT_SYMBOL(ieee80211_rts_duration);
196
197 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
198 struct ieee80211_vif *vif,
199 size_t frame_len,
200 const struct ieee80211_tx_info *frame_txctl)
201 {
202 struct ieee80211_local *local = hw_to_local(hw);
203 struct ieee80211_rate *rate;
204 struct ieee80211_sub_if_data *sdata;
205 bool short_preamble;
206 int erp, shift = 0, bitrate;
207 u16 dur;
208 struct ieee80211_supported_band *sband;
209
210 sband = local->hw.wiphy->bands[frame_txctl->band];
211
212 short_preamble = false;
213
214 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
215 erp = 0;
216 if (vif) {
217 sdata = vif_to_sdata(vif);
218 short_preamble = sdata->vif.bss_conf.use_short_preamble;
219 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
220 erp = rate->flags & IEEE80211_RATE_ERP_G;
221 shift = ieee80211_vif_get_shift(vif);
222 }
223
224 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
225
226 /* Data frame duration */
227 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
228 erp, short_preamble, shift);
229 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
230 /* ACK duration */
231 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
232 erp, short_preamble, shift);
233 }
234
235 return cpu_to_le16(dur);
236 }
237 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
238
239 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
240 {
241 struct ieee80211_local *local = sdata->local;
242 struct ieee80211_vif *vif = &sdata->vif;
243 struct fq *fq = &local->fq;
244 struct ps_data *ps = NULL;
245 struct txq_info *txqi;
246 struct sta_info *sta;
247 int i;
248
249 local_bh_disable();
250 spin_lock(&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(&fq->lock);
277 drv_wake_tx_queue(local, txqi);
278 spin_lock(&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(&fq->lock);
292
293 drv_wake_tx_queue(local, txqi);
294 local_bh_enable();
295 return;
296 out:
297 spin_unlock(&fq->lock);
298 local_bh_enable();
299 }
300
301 static void
302 __releases(&local->queue_stop_reason_lock)
303 __acquires(&local->queue_stop_reason_lock)
304 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
305 {
306 struct ieee80211_sub_if_data *sdata;
307 int n_acs = IEEE80211_NUM_ACS;
308 int i;
309
310 rcu_read_lock();
311
312 if (local->hw.queues < IEEE80211_NUM_ACS)
313 n_acs = 1;
314
315 for (i = 0; i < local->hw.queues; i++) {
316 if (local->queue_stop_reasons[i])
317 continue;
318
319 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
320 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
321 int ac;
322
323 for (ac = 0; ac < n_acs; ac++) {
324 int ac_queue = sdata->vif.hw_queue[ac];
325
326 if (ac_queue == i ||
327 sdata->vif.cab_queue == i)
328 __ieee80211_wake_txqs(sdata, ac);
329 }
330 }
331 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
332 }
333
334 rcu_read_unlock();
335 }
336
337 void ieee80211_wake_txqs(unsigned long data)
338 {
339 struct ieee80211_local *local = (struct ieee80211_local *)data;
340 unsigned long flags;
341
342 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
343 _ieee80211_wake_txqs(local, &flags);
344 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
345 }
346
347 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
348 {
349 struct ieee80211_sub_if_data *sdata;
350 int n_acs = IEEE80211_NUM_ACS;
351
352 if (local->ops->wake_tx_queue)
353 return;
354
355 if (local->hw.queues < IEEE80211_NUM_ACS)
356 n_acs = 1;
357
358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
359 int ac;
360
361 if (!sdata->dev)
362 continue;
363
364 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
365 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
366 continue;
367
368 for (ac = 0; ac < n_acs; ac++) {
369 int ac_queue = sdata->vif.hw_queue[ac];
370
371 if (ac_queue == queue ||
372 (sdata->vif.cab_queue == queue &&
373 local->queue_stop_reasons[ac_queue] == 0 &&
374 skb_queue_empty(&local->pending[ac_queue])))
375 netif_wake_subqueue(sdata->dev, ac);
376 }
377 }
378 }
379
380 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
381 enum queue_stop_reason reason,
382 bool refcounted,
383 unsigned long *flags)
384 {
385 struct ieee80211_local *local = hw_to_local(hw);
386
387 trace_wake_queue(local, queue, reason);
388
389 if (WARN_ON(queue >= hw->queues))
390 return;
391
392 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
394
395 if (!refcounted) {
396 local->q_stop_reasons[queue][reason] = 0;
397 } else {
398 local->q_stop_reasons[queue][reason]--;
399 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
400 local->q_stop_reasons[queue][reason] = 0;
401 }
402
403 if (local->q_stop_reasons[queue][reason] == 0)
404 __clear_bit(reason, &local->queue_stop_reasons[queue]);
405
406 if (local->queue_stop_reasons[queue] != 0)
407 /* someone still has this queue stopped */
408 return;
409
410 if (skb_queue_empty(&local->pending[queue])) {
411 rcu_read_lock();
412 ieee80211_propagate_queue_wake(local, queue);
413 rcu_read_unlock();
414 } else
415 tasklet_schedule(&local->tx_pending_tasklet);
416
417 /*
418 * Calling _ieee80211_wake_txqs here can be a problem because it may
419 * release queue_stop_reason_lock which has been taken by
420 * __ieee80211_wake_queue's caller. It is certainly not very nice to
421 * release someone's lock, but it is fine because all the callers of
422 * __ieee80211_wake_queue call it right before releasing the lock.
423 */
424 if (local->ops->wake_tx_queue) {
425 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
426 tasklet_schedule(&local->wake_txqs_tasklet);
427 else
428 _ieee80211_wake_txqs(local, flags);
429 }
430 }
431
432 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
433 enum queue_stop_reason reason,
434 bool refcounted)
435 {
436 struct ieee80211_local *local = hw_to_local(hw);
437 unsigned long flags;
438
439 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
440 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
441 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
442 }
443
444 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
445 {
446 ieee80211_wake_queue_by_reason(hw, queue,
447 IEEE80211_QUEUE_STOP_REASON_DRIVER,
448 false);
449 }
450 EXPORT_SYMBOL(ieee80211_wake_queue);
451
452 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
453 enum queue_stop_reason reason,
454 bool refcounted)
455 {
456 struct ieee80211_local *local = hw_to_local(hw);
457 struct ieee80211_sub_if_data *sdata;
458 int n_acs = IEEE80211_NUM_ACS;
459
460 trace_stop_queue(local, queue, reason);
461
462 if (WARN_ON(queue >= hw->queues))
463 return;
464
465 if (!refcounted)
466 local->q_stop_reasons[queue][reason] = 1;
467 else
468 local->q_stop_reasons[queue][reason]++;
469
470 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
471 return;
472
473 if (local->hw.queues < IEEE80211_NUM_ACS)
474 n_acs = 1;
475
476 rcu_read_lock();
477 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
478 int ac;
479
480 if (!sdata->dev)
481 continue;
482
483 for (ac = 0; ac < n_acs; ac++) {
484 if (sdata->vif.hw_queue[ac] == queue ||
485 sdata->vif.cab_queue == queue) {
486 if (!local->ops->wake_tx_queue) {
487 netif_stop_subqueue(sdata->dev, ac);
488 continue;
489 }
490 spin_lock(&local->fq.lock);
491 sdata->vif.txqs_stopped[ac] = true;
492 spin_unlock(&local->fq.lock);
493 }
494 }
495 }
496 rcu_read_unlock();
497 }
498
499 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
500 enum queue_stop_reason reason,
501 bool refcounted)
502 {
503 struct ieee80211_local *local = hw_to_local(hw);
504 unsigned long flags;
505
506 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
507 __ieee80211_stop_queue(hw, queue, reason, refcounted);
508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
509 }
510
511 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
512 {
513 ieee80211_stop_queue_by_reason(hw, queue,
514 IEEE80211_QUEUE_STOP_REASON_DRIVER,
515 false);
516 }
517 EXPORT_SYMBOL(ieee80211_stop_queue);
518
519 void ieee80211_add_pending_skb(struct ieee80211_local *local,
520 struct sk_buff *skb)
521 {
522 struct ieee80211_hw *hw = &local->hw;
523 unsigned long flags;
524 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
525 int queue = info->hw_queue;
526
527 if (WARN_ON(!info->control.vif)) {
528 ieee80211_free_txskb(&local->hw, skb);
529 return;
530 }
531
532 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
533 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
534 false);
535 __skb_queue_tail(&local->pending[queue], skb);
536 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
537 false, &flags);
538 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
539 }
540
541 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
542 struct sk_buff_head *skbs)
543 {
544 struct ieee80211_hw *hw = &local->hw;
545 struct sk_buff *skb;
546 unsigned long flags;
547 int queue, i;
548
549 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
550 while ((skb = skb_dequeue(skbs))) {
551 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
552
553 if (WARN_ON(!info->control.vif)) {
554 ieee80211_free_txskb(&local->hw, skb);
555 continue;
556 }
557
558 queue = info->hw_queue;
559
560 __ieee80211_stop_queue(hw, queue,
561 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
562 false);
563
564 __skb_queue_tail(&local->pending[queue], skb);
565 }
566
567 for (i = 0; i < hw->queues; i++)
568 __ieee80211_wake_queue(hw, i,
569 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
570 false, &flags);
571 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
572 }
573
574 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
575 unsigned long queues,
576 enum queue_stop_reason reason,
577 bool refcounted)
578 {
579 struct ieee80211_local *local = hw_to_local(hw);
580 unsigned long flags;
581 int i;
582
583 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
584
585 for_each_set_bit(i, &queues, hw->queues)
586 __ieee80211_stop_queue(hw, i, reason, refcounted);
587
588 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
589 }
590
591 void ieee80211_stop_queues(struct ieee80211_hw *hw)
592 {
593 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
594 IEEE80211_QUEUE_STOP_REASON_DRIVER,
595 false);
596 }
597 EXPORT_SYMBOL(ieee80211_stop_queues);
598
599 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
600 {
601 struct ieee80211_local *local = hw_to_local(hw);
602 unsigned long flags;
603 int ret;
604
605 if (WARN_ON(queue >= hw->queues))
606 return true;
607
608 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
609 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
610 &local->queue_stop_reasons[queue]);
611 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
612 return ret;
613 }
614 EXPORT_SYMBOL(ieee80211_queue_stopped);
615
616 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
617 unsigned long queues,
618 enum queue_stop_reason reason,
619 bool refcounted)
620 {
621 struct ieee80211_local *local = hw_to_local(hw);
622 unsigned long flags;
623 int i;
624
625 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
626
627 for_each_set_bit(i, &queues, hw->queues)
628 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
629
630 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
631 }
632
633 void ieee80211_wake_queues(struct ieee80211_hw *hw)
634 {
635 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
636 IEEE80211_QUEUE_STOP_REASON_DRIVER,
637 false);
638 }
639 EXPORT_SYMBOL(ieee80211_wake_queues);
640
641 static unsigned int
642 ieee80211_get_vif_queues(struct ieee80211_local *local,
643 struct ieee80211_sub_if_data *sdata)
644 {
645 unsigned int queues;
646
647 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
648 int ac;
649
650 queues = 0;
651
652 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
653 queues |= BIT(sdata->vif.hw_queue[ac]);
654 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
655 queues |= BIT(sdata->vif.cab_queue);
656 } else {
657 /* all queues */
658 queues = BIT(local->hw.queues) - 1;
659 }
660
661 return queues;
662 }
663
664 void __ieee80211_flush_queues(struct ieee80211_local *local,
665 struct ieee80211_sub_if_data *sdata,
666 unsigned int queues, bool drop)
667 {
668 if (!local->ops->flush)
669 return;
670
671 /*
672 * If no queue was set, or if the HW doesn't support
673 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
674 */
675 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
676 queues = ieee80211_get_vif_queues(local, sdata);
677
678 ieee80211_stop_queues_by_reason(&local->hw, queues,
679 IEEE80211_QUEUE_STOP_REASON_FLUSH,
680 false);
681
682 drv_flush(local, sdata, queues, drop);
683
684 ieee80211_wake_queues_by_reason(&local->hw, queues,
685 IEEE80211_QUEUE_STOP_REASON_FLUSH,
686 false);
687 }
688
689 void ieee80211_flush_queues(struct ieee80211_local *local,
690 struct ieee80211_sub_if_data *sdata, bool drop)
691 {
692 __ieee80211_flush_queues(local, sdata, 0, drop);
693 }
694
695 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
696 struct ieee80211_sub_if_data *sdata,
697 enum queue_stop_reason reason)
698 {
699 ieee80211_stop_queues_by_reason(&local->hw,
700 ieee80211_get_vif_queues(local, sdata),
701 reason, true);
702 }
703
704 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
705 struct ieee80211_sub_if_data *sdata,
706 enum queue_stop_reason reason)
707 {
708 ieee80211_wake_queues_by_reason(&local->hw,
709 ieee80211_get_vif_queues(local, sdata),
710 reason, true);
711 }
712
713 static void __iterate_interfaces(struct ieee80211_local *local,
714 u32 iter_flags,
715 void (*iterator)(void *data, u8 *mac,
716 struct ieee80211_vif *vif),
717 void *data)
718 {
719 struct ieee80211_sub_if_data *sdata;
720 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
721
722 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
723 switch (sdata->vif.type) {
724 case NL80211_IFTYPE_MONITOR:
725 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
726 continue;
727 break;
728 case NL80211_IFTYPE_AP_VLAN:
729 continue;
730 default:
731 break;
732 }
733 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
734 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
735 continue;
736 if (ieee80211_sdata_running(sdata) || !active_only)
737 iterator(data, sdata->vif.addr,
738 &sdata->vif);
739 }
740
741 sdata = rcu_dereference_check(local->monitor_sdata,
742 lockdep_is_held(&local->iflist_mtx) ||
743 lockdep_rtnl_is_held());
744 if (sdata &&
745 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
746 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
747 iterator(data, sdata->vif.addr, &sdata->vif);
748 }
749
750 void ieee80211_iterate_interfaces(
751 struct ieee80211_hw *hw, u32 iter_flags,
752 void (*iterator)(void *data, u8 *mac,
753 struct ieee80211_vif *vif),
754 void *data)
755 {
756 struct ieee80211_local *local = hw_to_local(hw);
757
758 mutex_lock(&local->iflist_mtx);
759 __iterate_interfaces(local, iter_flags, iterator, data);
760 mutex_unlock(&local->iflist_mtx);
761 }
762 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
763
764 void ieee80211_iterate_active_interfaces_atomic(
765 struct ieee80211_hw *hw, u32 iter_flags,
766 void (*iterator)(void *data, u8 *mac,
767 struct ieee80211_vif *vif),
768 void *data)
769 {
770 struct ieee80211_local *local = hw_to_local(hw);
771
772 rcu_read_lock();
773 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
774 iterator, data);
775 rcu_read_unlock();
776 }
777 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
778
779 void ieee80211_iterate_active_interfaces_rtnl(
780 struct ieee80211_hw *hw, u32 iter_flags,
781 void (*iterator)(void *data, u8 *mac,
782 struct ieee80211_vif *vif),
783 void *data)
784 {
785 struct ieee80211_local *local = hw_to_local(hw);
786
787 ASSERT_RTNL();
788
789 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
790 iterator, data);
791 }
792 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
793
794 static void __iterate_stations(struct ieee80211_local *local,
795 void (*iterator)(void *data,
796 struct ieee80211_sta *sta),
797 void *data)
798 {
799 struct sta_info *sta;
800
801 list_for_each_entry_rcu(sta, &local->sta_list, list) {
802 if (!sta->uploaded)
803 continue;
804
805 iterator(data, &sta->sta);
806 }
807 }
808
809 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
810 void (*iterator)(void *data,
811 struct ieee80211_sta *sta),
812 void *data)
813 {
814 struct ieee80211_local *local = hw_to_local(hw);
815
816 rcu_read_lock();
817 __iterate_stations(local, iterator, data);
818 rcu_read_unlock();
819 }
820 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
821
822 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
823 {
824 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
825
826 if (!ieee80211_sdata_running(sdata) ||
827 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
828 return NULL;
829 return &sdata->vif;
830 }
831 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
832
833 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
834 {
835 struct ieee80211_sub_if_data *sdata;
836
837 if (!vif)
838 return NULL;
839
840 sdata = vif_to_sdata(vif);
841
842 if (!ieee80211_sdata_running(sdata) ||
843 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
844 return NULL;
845
846 return &sdata->wdev;
847 }
848 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
849
850 /*
851 * Nothing should have been stuffed into the workqueue during
852 * the suspend->resume cycle. Since we can't check each caller
853 * of this function if we are already quiescing / suspended,
854 * check here and don't WARN since this can actually happen when
855 * the rx path (for example) is racing against __ieee80211_suspend
856 * and suspending / quiescing was set after the rx path checked
857 * them.
858 */
859 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
860 {
861 if (local->quiescing || (local->suspended && !local->resuming)) {
862 pr_warn("queueing ieee80211 work while going to suspend\n");
863 return false;
864 }
865
866 return true;
867 }
868
869 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
870 {
871 struct ieee80211_local *local = hw_to_local(hw);
872
873 if (!ieee80211_can_queue_work(local))
874 return;
875
876 queue_work(local->workqueue, work);
877 }
878 EXPORT_SYMBOL(ieee80211_queue_work);
879
880 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
881 struct delayed_work *dwork,
882 unsigned long delay)
883 {
884 struct ieee80211_local *local = hw_to_local(hw);
885
886 if (!ieee80211_can_queue_work(local))
887 return;
888
889 queue_delayed_work(local->workqueue, dwork, delay);
890 }
891 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
892
893 static void ieee80211_parse_extension_element(u32 *crc,
894 const struct element *elem,
895 struct ieee802_11_elems *elems)
896 {
897 const void *data = elem->data + 1;
898 u8 len = elem->datalen - 1;
899
900 switch (elem->data[0]) {
901 case WLAN_EID_EXT_HE_MU_EDCA:
902 if (len == sizeof(*elems->mu_edca_param_set)) {
903 elems->mu_edca_param_set = data;
904 if (crc)
905 *crc = crc32_be(*crc, (void *)elem,
906 elem->datalen + 2);
907 }
908 break;
909 case WLAN_EID_EXT_HE_CAPABILITY:
910 elems->he_cap = data;
911 elems->he_cap_len = len;
912 break;
913 case WLAN_EID_EXT_HE_OPERATION:
914 if (len >= sizeof(*elems->he_operation) &&
915 len == ieee80211_he_oper_size(data) - 1) {
916 if (crc)
917 *crc = crc32_be(*crc, (void *)elem,
918 elem->datalen + 2);
919 elems->he_operation = data;
920 }
921 break;
922 case WLAN_EID_EXT_UORA:
923 if (len == 1)
924 elems->uora_element = data;
925 break;
926 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
927 if (len == 3)
928 elems->max_channel_switch_time = data;
929 break;
930 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
931 if (len == sizeof(*elems->mbssid_config_ie))
932 elems->mbssid_config_ie = data;
933 break;
934 case WLAN_EID_EXT_HE_SPR:
935 if (len >= sizeof(*elems->he_spr) &&
936 len >= ieee80211_he_spr_size(data))
937 elems->he_spr = data;
938 break;
939 }
940 }
941
942 static u32
943 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
944 struct ieee802_11_elems *elems,
945 u64 filter, u32 crc,
946 const struct element *check_inherit)
947 {
948 const struct element *elem;
949 bool calc_crc = filter != 0;
950 DECLARE_BITMAP(seen_elems, 256);
951 const u8 *ie;
952
953 bitmap_zero(seen_elems, 256);
954
955 for_each_element(elem, start, len) {
956 bool elem_parse_failed;
957 u8 id = elem->id;
958 u8 elen = elem->datalen;
959 const u8 *pos = elem->data;
960
961 if (check_inherit &&
962 !cfg80211_is_element_inherited(elem,
963 check_inherit))
964 continue;
965
966 switch (id) {
967 case WLAN_EID_SSID:
968 case WLAN_EID_SUPP_RATES:
969 case WLAN_EID_FH_PARAMS:
970 case WLAN_EID_DS_PARAMS:
971 case WLAN_EID_CF_PARAMS:
972 case WLAN_EID_TIM:
973 case WLAN_EID_IBSS_PARAMS:
974 case WLAN_EID_CHALLENGE:
975 case WLAN_EID_RSN:
976 case WLAN_EID_ERP_INFO:
977 case WLAN_EID_EXT_SUPP_RATES:
978 case WLAN_EID_HT_CAPABILITY:
979 case WLAN_EID_HT_OPERATION:
980 case WLAN_EID_VHT_CAPABILITY:
981 case WLAN_EID_VHT_OPERATION:
982 case WLAN_EID_MESH_ID:
983 case WLAN_EID_MESH_CONFIG:
984 case WLAN_EID_PEER_MGMT:
985 case WLAN_EID_PREQ:
986 case WLAN_EID_PREP:
987 case WLAN_EID_PERR:
988 case WLAN_EID_RANN:
989 case WLAN_EID_CHANNEL_SWITCH:
990 case WLAN_EID_EXT_CHANSWITCH_ANN:
991 case WLAN_EID_COUNTRY:
992 case WLAN_EID_PWR_CONSTRAINT:
993 case WLAN_EID_TIMEOUT_INTERVAL:
994 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
995 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
996 case WLAN_EID_CHAN_SWITCH_PARAM:
997 case WLAN_EID_EXT_CAPABILITY:
998 case WLAN_EID_CHAN_SWITCH_TIMING:
999 case WLAN_EID_LINK_ID:
1000 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1001 case WLAN_EID_RSNX:
1002 /*
1003 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1004 * that if the content gets bigger it might be needed more than once
1005 */
1006 if (test_bit(id, seen_elems)) {
1007 elems->parse_error = true;
1008 continue;
1009 }
1010 break;
1011 }
1012
1013 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1014 crc = crc32_be(crc, pos - 2, elen + 2);
1015
1016 elem_parse_failed = false;
1017
1018 switch (id) {
1019 case WLAN_EID_LINK_ID:
1020 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1021 elem_parse_failed = true;
1022 break;
1023 }
1024 elems->lnk_id = (void *)(pos - 2);
1025 break;
1026 case WLAN_EID_CHAN_SWITCH_TIMING:
1027 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1028 elem_parse_failed = true;
1029 break;
1030 }
1031 elems->ch_sw_timing = (void *)pos;
1032 break;
1033 case WLAN_EID_EXT_CAPABILITY:
1034 elems->ext_capab = pos;
1035 elems->ext_capab_len = elen;
1036 break;
1037 case WLAN_EID_SSID:
1038 elems->ssid = pos;
1039 elems->ssid_len = elen;
1040 break;
1041 case WLAN_EID_SUPP_RATES:
1042 elems->supp_rates = pos;
1043 elems->supp_rates_len = elen;
1044 break;
1045 case WLAN_EID_DS_PARAMS:
1046 if (elen >= 1)
1047 elems->ds_params = pos;
1048 else
1049 elem_parse_failed = true;
1050 break;
1051 case WLAN_EID_TIM:
1052 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1053 elems->tim = (void *)pos;
1054 elems->tim_len = elen;
1055 } else
1056 elem_parse_failed = true;
1057 break;
1058 case WLAN_EID_CHALLENGE:
1059 elems->challenge = pos;
1060 elems->challenge_len = elen;
1061 break;
1062 case WLAN_EID_VENDOR_SPECIFIC:
1063 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1064 pos[2] == 0xf2) {
1065 /* Microsoft OUI (00:50:F2) */
1066
1067 if (calc_crc)
1068 crc = crc32_be(crc, pos - 2, elen + 2);
1069
1070 if (elen >= 5 && pos[3] == 2) {
1071 /* OUI Type 2 - WMM IE */
1072 if (pos[4] == 0) {
1073 elems->wmm_info = pos;
1074 elems->wmm_info_len = elen;
1075 } else if (pos[4] == 1) {
1076 elems->wmm_param = pos;
1077 elems->wmm_param_len = elen;
1078 }
1079 }
1080 }
1081 break;
1082 case WLAN_EID_RSN:
1083 elems->rsn = pos;
1084 elems->rsn_len = elen;
1085 break;
1086 case WLAN_EID_ERP_INFO:
1087 if (elen >= 1)
1088 elems->erp_info = pos;
1089 else
1090 elem_parse_failed = true;
1091 break;
1092 case WLAN_EID_EXT_SUPP_RATES:
1093 elems->ext_supp_rates = pos;
1094 elems->ext_supp_rates_len = elen;
1095 break;
1096 case WLAN_EID_HT_CAPABILITY:
1097 if (elen >= sizeof(struct ieee80211_ht_cap))
1098 elems->ht_cap_elem = (void *)pos;
1099 else
1100 elem_parse_failed = true;
1101 break;
1102 case WLAN_EID_HT_OPERATION:
1103 if (elen >= sizeof(struct ieee80211_ht_operation))
1104 elems->ht_operation = (void *)pos;
1105 else
1106 elem_parse_failed = true;
1107 break;
1108 case WLAN_EID_VHT_CAPABILITY:
1109 if (elen >= sizeof(struct ieee80211_vht_cap))
1110 elems->vht_cap_elem = (void *)pos;
1111 else
1112 elem_parse_failed = true;
1113 break;
1114 case WLAN_EID_VHT_OPERATION:
1115 if (elen >= sizeof(struct ieee80211_vht_operation)) {
1116 elems->vht_operation = (void *)pos;
1117 if (calc_crc)
1118 crc = crc32_be(crc, pos - 2, elen + 2);
1119 break;
1120 }
1121 elem_parse_failed = true;
1122 break;
1123 case WLAN_EID_OPMODE_NOTIF:
1124 if (elen > 0) {
1125 elems->opmode_notif = pos;
1126 if (calc_crc)
1127 crc = crc32_be(crc, pos - 2, elen + 2);
1128 break;
1129 }
1130 elem_parse_failed = true;
1131 break;
1132 case WLAN_EID_MESH_ID:
1133 elems->mesh_id = pos;
1134 elems->mesh_id_len = elen;
1135 break;
1136 case WLAN_EID_MESH_CONFIG:
1137 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1138 elems->mesh_config = (void *)pos;
1139 else
1140 elem_parse_failed = true;
1141 break;
1142 case WLAN_EID_PEER_MGMT:
1143 elems->peering = pos;
1144 elems->peering_len = elen;
1145 break;
1146 case WLAN_EID_MESH_AWAKE_WINDOW:
1147 if (elen >= 2)
1148 elems->awake_window = (void *)pos;
1149 break;
1150 case WLAN_EID_PREQ:
1151 elems->preq = pos;
1152 elems->preq_len = elen;
1153 break;
1154 case WLAN_EID_PREP:
1155 elems->prep = pos;
1156 elems->prep_len = elen;
1157 break;
1158 case WLAN_EID_PERR:
1159 elems->perr = pos;
1160 elems->perr_len = elen;
1161 break;
1162 case WLAN_EID_RANN:
1163 if (elen >= sizeof(struct ieee80211_rann_ie))
1164 elems->rann = (void *)pos;
1165 else
1166 elem_parse_failed = true;
1167 break;
1168 case WLAN_EID_CHANNEL_SWITCH:
1169 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1170 elem_parse_failed = true;
1171 break;
1172 }
1173 elems->ch_switch_ie = (void *)pos;
1174 break;
1175 case WLAN_EID_EXT_CHANSWITCH_ANN:
1176 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1177 elem_parse_failed = true;
1178 break;
1179 }
1180 elems->ext_chansw_ie = (void *)pos;
1181 break;
1182 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1183 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1184 elem_parse_failed = true;
1185 break;
1186 }
1187 elems->sec_chan_offs = (void *)pos;
1188 break;
1189 case WLAN_EID_CHAN_SWITCH_PARAM:
1190 if (elen !=
1191 sizeof(*elems->mesh_chansw_params_ie)) {
1192 elem_parse_failed = true;
1193 break;
1194 }
1195 elems->mesh_chansw_params_ie = (void *)pos;
1196 break;
1197 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1198 if (!action ||
1199 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1200 elem_parse_failed = true;
1201 break;
1202 }
1203 elems->wide_bw_chansw_ie = (void *)pos;
1204 break;
1205 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1206 if (action) {
1207 elem_parse_failed = true;
1208 break;
1209 }
1210 /*
1211 * This is a bit tricky, but as we only care about
1212 * the wide bandwidth channel switch element, so
1213 * just parse it out manually.
1214 */
1215 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1216 pos, elen);
1217 if (ie) {
1218 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1219 elems->wide_bw_chansw_ie =
1220 (void *)(ie + 2);
1221 else
1222 elem_parse_failed = true;
1223 }
1224 break;
1225 case WLAN_EID_COUNTRY:
1226 elems->country_elem = pos;
1227 elems->country_elem_len = elen;
1228 break;
1229 case WLAN_EID_PWR_CONSTRAINT:
1230 if (elen != 1) {
1231 elem_parse_failed = true;
1232 break;
1233 }
1234 elems->pwr_constr_elem = pos;
1235 break;
1236 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1237 /* Lots of different options exist, but we only care
1238 * about the Dynamic Transmit Power Control element.
1239 * First check for the Cisco OUI, then for the DTPC
1240 * tag (0x00).
1241 */
1242 if (elen < 4) {
1243 elem_parse_failed = true;
1244 break;
1245 }
1246
1247 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1248 pos[2] != 0x96 || pos[3] != 0x00)
1249 break;
1250
1251 if (elen != 6) {
1252 elem_parse_failed = true;
1253 break;
1254 }
1255
1256 if (calc_crc)
1257 crc = crc32_be(crc, pos - 2, elen + 2);
1258
1259 elems->cisco_dtpc_elem = pos;
1260 break;
1261 case WLAN_EID_ADDBA_EXT:
1262 if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1263 elem_parse_failed = true;
1264 break;
1265 }
1266 elems->addba_ext_ie = (void *)pos;
1267 break;
1268 case WLAN_EID_TIMEOUT_INTERVAL:
1269 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1270 elems->timeout_int = (void *)pos;
1271 else
1272 elem_parse_failed = true;
1273 break;
1274 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1275 if (elen >= sizeof(*elems->max_idle_period_ie))
1276 elems->max_idle_period_ie = (void *)pos;
1277 break;
1278 case WLAN_EID_RSNX:
1279 elems->rsnx = pos;
1280 elems->rsnx_len = elen;
1281 break;
1282 case WLAN_EID_EXTENSION:
1283 ieee80211_parse_extension_element(calc_crc ?
1284 &crc : NULL,
1285 elem, elems);
1286 break;
1287 default:
1288 break;
1289 }
1290
1291 if (elem_parse_failed)
1292 elems->parse_error = true;
1293 else
1294 __set_bit(id, seen_elems);
1295 }
1296
1297 if (!for_each_element_completed(elem, start, len))
1298 elems->parse_error = true;
1299
1300 return crc;
1301 }
1302
1303 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1304 struct ieee802_11_elems *elems,
1305 u8 *transmitter_bssid,
1306 u8 *bss_bssid,
1307 u8 *nontransmitted_profile)
1308 {
1309 const struct element *elem, *sub;
1310 size_t profile_len = 0;
1311 bool found = false;
1312
1313 if (!bss_bssid || !transmitter_bssid)
1314 return profile_len;
1315
1316 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1317 if (elem->datalen < 2)
1318 continue;
1319
1320 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1321 u8 new_bssid[ETH_ALEN];
1322 const u8 *index;
1323
1324 if (sub->id != 0 || sub->datalen < 4) {
1325 /* not a valid BSS profile */
1326 continue;
1327 }
1328
1329 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1330 sub->data[1] != 2) {
1331 /* The first element of the
1332 * Nontransmitted BSSID Profile is not
1333 * the Nontransmitted BSSID Capability
1334 * element.
1335 */
1336 continue;
1337 }
1338
1339 memset(nontransmitted_profile, 0, len);
1340 profile_len = cfg80211_merge_profile(start, len,
1341 elem,
1342 sub,
1343 nontransmitted_profile,
1344 len);
1345
1346 /* found a Nontransmitted BSSID Profile */
1347 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1348 nontransmitted_profile,
1349 profile_len);
1350 if (!index || index[1] < 1 || index[2] == 0) {
1351 /* Invalid MBSSID Index element */
1352 continue;
1353 }
1354
1355 cfg80211_gen_new_bssid(transmitter_bssid,
1356 elem->data[0],
1357 index[2],
1358 new_bssid);
1359 if (ether_addr_equal(new_bssid, bss_bssid)) {
1360 found = true;
1361 elems->bssid_index_len = index[1];
1362 elems->bssid_index = (void *)&index[2];
1363 break;
1364 }
1365 }
1366 }
1367
1368 return found ? profile_len : 0;
1369 }
1370
1371 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1372 struct ieee802_11_elems *elems,
1373 u64 filter, u32 crc, u8 *transmitter_bssid,
1374 u8 *bss_bssid)
1375 {
1376 const struct element *non_inherit = NULL;
1377 u8 *nontransmitted_profile;
1378 int nontransmitted_profile_len = 0;
1379
1380 memset(elems, 0, sizeof(*elems));
1381 elems->ie_start = start;
1382 elems->total_len = len;
1383
1384 nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1385 if (nontransmitted_profile) {
1386 nontransmitted_profile_len =
1387 ieee802_11_find_bssid_profile(start, len, elems,
1388 transmitter_bssid,
1389 bss_bssid,
1390 nontransmitted_profile);
1391 non_inherit =
1392 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1393 nontransmitted_profile,
1394 nontransmitted_profile_len);
1395 }
1396
1397 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1398 crc, non_inherit);
1399
1400 /* Override with nontransmitted profile, if found */
1401 if (nontransmitted_profile_len)
1402 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1403 nontransmitted_profile_len,
1404 action, elems, 0, 0, NULL);
1405
1406 if (elems->tim && !elems->parse_error) {
1407 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1408
1409 elems->dtim_period = tim_ie->dtim_period;
1410 elems->dtim_count = tim_ie->dtim_count;
1411 }
1412
1413 /* Override DTIM period and count if needed */
1414 if (elems->bssid_index &&
1415 elems->bssid_index_len >=
1416 offsetofend(struct ieee80211_bssid_index, dtim_period))
1417 elems->dtim_period = elems->bssid_index->dtim_period;
1418
1419 if (elems->bssid_index &&
1420 elems->bssid_index_len >=
1421 offsetofend(struct ieee80211_bssid_index, dtim_count))
1422 elems->dtim_count = elems->bssid_index->dtim_count;
1423
1424 kfree(nontransmitted_profile);
1425
1426 return crc;
1427 }
1428
1429 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1430 struct ieee80211_tx_queue_params
1431 *qparam, int ac)
1432 {
1433 struct ieee80211_chanctx_conf *chanctx_conf;
1434 const struct ieee80211_reg_rule *rrule;
1435 const struct ieee80211_wmm_ac *wmm_ac;
1436 u16 center_freq = 0;
1437
1438 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1439 sdata->vif.type != NL80211_IFTYPE_STATION)
1440 return;
1441
1442 rcu_read_lock();
1443 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1444 if (chanctx_conf)
1445 center_freq = chanctx_conf->def.chan->center_freq;
1446
1447 if (!center_freq) {
1448 rcu_read_unlock();
1449 return;
1450 }
1451
1452 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1453
1454 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1455 rcu_read_unlock();
1456 return;
1457 }
1458
1459 if (sdata->vif.type == NL80211_IFTYPE_AP)
1460 wmm_ac = &rrule->wmm_rule.ap[ac];
1461 else
1462 wmm_ac = &rrule->wmm_rule.client[ac];
1463 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1464 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1465 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1466 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1467 rcu_read_unlock();
1468 }
1469
1470 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1471 bool bss_notify, bool enable_qos)
1472 {
1473 struct ieee80211_local *local = sdata->local;
1474 struct ieee80211_tx_queue_params qparam;
1475 struct ieee80211_chanctx_conf *chanctx_conf;
1476 int ac;
1477 bool use_11b;
1478 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1479 int aCWmin, aCWmax;
1480
1481 if (!local->ops->conf_tx)
1482 return;
1483
1484 if (local->hw.queues < IEEE80211_NUM_ACS)
1485 return;
1486
1487 memset(&qparam, 0, sizeof(qparam));
1488
1489 rcu_read_lock();
1490 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1491 use_11b = (chanctx_conf &&
1492 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1493 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1494 rcu_read_unlock();
1495
1496 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1497
1498 /* Set defaults according to 802.11-2007 Table 7-37 */
1499 aCWmax = 1023;
1500 if (use_11b)
1501 aCWmin = 31;
1502 else
1503 aCWmin = 15;
1504
1505 /* Confiure old 802.11b/g medium access rules. */
1506 qparam.cw_max = aCWmax;
1507 qparam.cw_min = aCWmin;
1508 qparam.txop = 0;
1509 qparam.aifs = 2;
1510
1511 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1512 /* Update if QoS is enabled. */
1513 if (enable_qos) {
1514 switch (ac) {
1515 case IEEE80211_AC_BK:
1516 qparam.cw_max = aCWmax;
1517 qparam.cw_min = aCWmin;
1518 qparam.txop = 0;
1519 if (is_ocb)
1520 qparam.aifs = 9;
1521 else
1522 qparam.aifs = 7;
1523 break;
1524 /* never happens but let's not leave undefined */
1525 default:
1526 case IEEE80211_AC_BE:
1527 qparam.cw_max = aCWmax;
1528 qparam.cw_min = aCWmin;
1529 qparam.txop = 0;
1530 if (is_ocb)
1531 qparam.aifs = 6;
1532 else
1533 qparam.aifs = 3;
1534 break;
1535 case IEEE80211_AC_VI:
1536 qparam.cw_max = aCWmin;
1537 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1538 if (is_ocb)
1539 qparam.txop = 0;
1540 else if (use_11b)
1541 qparam.txop = 6016/32;
1542 else
1543 qparam.txop = 3008/32;
1544
1545 if (is_ocb)
1546 qparam.aifs = 3;
1547 else
1548 qparam.aifs = 2;
1549 break;
1550 case IEEE80211_AC_VO:
1551 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1552 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1553 if (is_ocb)
1554 qparam.txop = 0;
1555 else if (use_11b)
1556 qparam.txop = 3264/32;
1557 else
1558 qparam.txop = 1504/32;
1559 qparam.aifs = 2;
1560 break;
1561 }
1562 }
1563 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1564
1565 qparam.uapsd = false;
1566
1567 sdata->tx_conf[ac] = qparam;
1568 drv_conf_tx(local, sdata, ac, &qparam);
1569 }
1570
1571 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1572 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1573 sdata->vif.type != NL80211_IFTYPE_NAN) {
1574 sdata->vif.bss_conf.qos = enable_qos;
1575 if (bss_notify)
1576 ieee80211_bss_info_change_notify(sdata,
1577 BSS_CHANGED_QOS);
1578 }
1579 }
1580
1581 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1582 u16 transaction, u16 auth_alg, u16 status,
1583 const u8 *extra, size_t extra_len, const u8 *da,
1584 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1585 u32 tx_flags)
1586 {
1587 struct ieee80211_local *local = sdata->local;
1588 struct sk_buff *skb;
1589 struct ieee80211_mgmt *mgmt;
1590 int err;
1591
1592 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1593 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1594 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1595 if (!skb)
1596 return;
1597
1598 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1599
1600 mgmt = skb_put_zero(skb, 24 + 6);
1601 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1602 IEEE80211_STYPE_AUTH);
1603 memcpy(mgmt->da, da, ETH_ALEN);
1604 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1605 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1606 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1607 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1608 mgmt->u.auth.status_code = cpu_to_le16(status);
1609 if (extra)
1610 skb_put_data(skb, extra, extra_len);
1611
1612 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1613 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1614 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1615 WARN_ON(err);
1616 }
1617
1618 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1619 tx_flags;
1620 ieee80211_tx_skb(sdata, skb);
1621 }
1622
1623 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1624 const u8 *da, const u8 *bssid,
1625 u16 stype, u16 reason,
1626 bool send_frame, u8 *frame_buf)
1627 {
1628 struct ieee80211_local *local = sdata->local;
1629 struct sk_buff *skb;
1630 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1631
1632 /* build frame */
1633 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1634 mgmt->duration = 0; /* initialize only */
1635 mgmt->seq_ctrl = 0; /* initialize only */
1636 memcpy(mgmt->da, da, ETH_ALEN);
1637 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1638 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1639 /* u.deauth.reason_code == u.disassoc.reason_code */
1640 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1641
1642 if (send_frame) {
1643 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1644 IEEE80211_DEAUTH_FRAME_LEN);
1645 if (!skb)
1646 return;
1647
1648 skb_reserve(skb, local->hw.extra_tx_headroom);
1649
1650 /* copy in frame */
1651 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1652
1653 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1654 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1655 IEEE80211_SKB_CB(skb)->flags |=
1656 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1657
1658 ieee80211_tx_skb(sdata, skb);
1659 }
1660 }
1661
1662 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1663 u8 *buffer, size_t buffer_len,
1664 const u8 *ie, size_t ie_len,
1665 enum nl80211_band band,
1666 u32 rate_mask,
1667 struct cfg80211_chan_def *chandef,
1668 size_t *offset, u32 flags)
1669 {
1670 struct ieee80211_supported_band *sband;
1671 const struct ieee80211_sta_he_cap *he_cap;
1672 u8 *pos = buffer, *end = buffer + buffer_len;
1673 size_t noffset;
1674 int supp_rates_len, i;
1675 u8 rates[32];
1676 int num_rates;
1677 int ext_rates_len;
1678 int shift;
1679 u32 rate_flags;
1680 bool have_80mhz = false;
1681
1682 *offset = 0;
1683
1684 sband = local->hw.wiphy->bands[band];
1685 if (WARN_ON_ONCE(!sband))
1686 return 0;
1687
1688 rate_flags = ieee80211_chandef_rate_flags(chandef);
1689 shift = ieee80211_chandef_get_shift(chandef);
1690
1691 num_rates = 0;
1692 for (i = 0; i < sband->n_bitrates; i++) {
1693 if ((BIT(i) & rate_mask) == 0)
1694 continue; /* skip rate */
1695 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1696 continue;
1697
1698 rates[num_rates++] =
1699 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1700 (1 << shift) * 5);
1701 }
1702
1703 supp_rates_len = min_t(int, num_rates, 8);
1704
1705 if (end - pos < 2 + supp_rates_len)
1706 goto out_err;
1707 *pos++ = WLAN_EID_SUPP_RATES;
1708 *pos++ = supp_rates_len;
1709 memcpy(pos, rates, supp_rates_len);
1710 pos += supp_rates_len;
1711
1712 /* insert "request information" if in custom IEs */
1713 if (ie && ie_len) {
1714 static const u8 before_extrates[] = {
1715 WLAN_EID_SSID,
1716 WLAN_EID_SUPP_RATES,
1717 WLAN_EID_REQUEST,
1718 };
1719 noffset = ieee80211_ie_split(ie, ie_len,
1720 before_extrates,
1721 ARRAY_SIZE(before_extrates),
1722 *offset);
1723 if (end - pos < noffset - *offset)
1724 goto out_err;
1725 memcpy(pos, ie + *offset, noffset - *offset);
1726 pos += noffset - *offset;
1727 *offset = noffset;
1728 }
1729
1730 ext_rates_len = num_rates - supp_rates_len;
1731 if (ext_rates_len > 0) {
1732 if (end - pos < 2 + ext_rates_len)
1733 goto out_err;
1734 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1735 *pos++ = ext_rates_len;
1736 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1737 pos += ext_rates_len;
1738 }
1739
1740 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1741 if (end - pos < 3)
1742 goto out_err;
1743 *pos++ = WLAN_EID_DS_PARAMS;
1744 *pos++ = 1;
1745 *pos++ = ieee80211_frequency_to_channel(
1746 chandef->chan->center_freq);
1747 }
1748
1749 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1750 goto done;
1751
1752 /* insert custom IEs that go before HT */
1753 if (ie && ie_len) {
1754 static const u8 before_ht[] = {
1755 /*
1756 * no need to list the ones split off already
1757 * (or generated here)
1758 */
1759 WLAN_EID_DS_PARAMS,
1760 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1761 };
1762 noffset = ieee80211_ie_split(ie, ie_len,
1763 before_ht, ARRAY_SIZE(before_ht),
1764 *offset);
1765 if (end - pos < noffset - *offset)
1766 goto out_err;
1767 memcpy(pos, ie + *offset, noffset - *offset);
1768 pos += noffset - *offset;
1769 *offset = noffset;
1770 }
1771
1772 if (sband->ht_cap.ht_supported) {
1773 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1774 goto out_err;
1775 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1776 sband->ht_cap.cap);
1777 }
1778
1779 /* insert custom IEs that go before VHT */
1780 if (ie && ie_len) {
1781 static const u8 before_vht[] = {
1782 /*
1783 * no need to list the ones split off already
1784 * (or generated here)
1785 */
1786 WLAN_EID_BSS_COEX_2040,
1787 WLAN_EID_EXT_CAPABILITY,
1788 WLAN_EID_SSID_LIST,
1789 WLAN_EID_CHANNEL_USAGE,
1790 WLAN_EID_INTERWORKING,
1791 WLAN_EID_MESH_ID,
1792 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1793 };
1794 noffset = ieee80211_ie_split(ie, ie_len,
1795 before_vht, ARRAY_SIZE(before_vht),
1796 *offset);
1797 if (end - pos < noffset - *offset)
1798 goto out_err;
1799 memcpy(pos, ie + *offset, noffset - *offset);
1800 pos += noffset - *offset;
1801 *offset = noffset;
1802 }
1803
1804 /* Check if any channel in this sband supports at least 80 MHz */
1805 for (i = 0; i < sband->n_channels; i++) {
1806 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1807 IEEE80211_CHAN_NO_80MHZ))
1808 continue;
1809
1810 have_80mhz = true;
1811 break;
1812 }
1813
1814 if (sband->vht_cap.vht_supported && have_80mhz) {
1815 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1816 goto out_err;
1817 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1818 sband->vht_cap.cap);
1819 }
1820
1821 /* insert custom IEs that go before HE */
1822 if (ie && ie_len) {
1823 static const u8 before_he[] = {
1824 /*
1825 * no need to list the ones split off before VHT
1826 * or generated here
1827 */
1828 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1829 WLAN_EID_AP_CSN,
1830 /* TODO: add 11ah/11aj/11ak elements */
1831 };
1832 noffset = ieee80211_ie_split(ie, ie_len,
1833 before_he, ARRAY_SIZE(before_he),
1834 *offset);
1835 if (end - pos < noffset - *offset)
1836 goto out_err;
1837 memcpy(pos, ie + *offset, noffset - *offset);
1838 pos += noffset - *offset;
1839 *offset = noffset;
1840 }
1841
1842 he_cap = ieee80211_get_he_sta_cap(sband);
1843 if (he_cap) {
1844 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1845 if (!pos)
1846 goto out_err;
1847 }
1848
1849 /*
1850 * If adding more here, adjust code in main.c
1851 * that calculates local->scan_ies_len.
1852 */
1853
1854 return pos - buffer;
1855 out_err:
1856 WARN_ONCE(1, "not enough space for preq IEs\n");
1857 done:
1858 return pos - buffer;
1859 }
1860
1861 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1862 size_t buffer_len,
1863 struct ieee80211_scan_ies *ie_desc,
1864 const u8 *ie, size_t ie_len,
1865 u8 bands_used, u32 *rate_masks,
1866 struct cfg80211_chan_def *chandef,
1867 u32 flags)
1868 {
1869 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1870 int i;
1871
1872 memset(ie_desc, 0, sizeof(*ie_desc));
1873
1874 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1875 if (bands_used & BIT(i)) {
1876 pos += ieee80211_build_preq_ies_band(local,
1877 buffer + pos,
1878 buffer_len - pos,
1879 ie, ie_len, i,
1880 rate_masks[i],
1881 chandef,
1882 &custom_ie_offset,
1883 flags);
1884 ie_desc->ies[i] = buffer + old_pos;
1885 ie_desc->len[i] = pos - old_pos;
1886 old_pos = pos;
1887 }
1888 }
1889
1890 /* add any remaining custom IEs */
1891 if (ie && ie_len) {
1892 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1893 "not enough space for preq custom IEs\n"))
1894 return pos;
1895 memcpy(buffer + pos, ie + custom_ie_offset,
1896 ie_len - custom_ie_offset);
1897 ie_desc->common_ies = buffer + pos;
1898 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1899 pos += ie_len - custom_ie_offset;
1900 }
1901
1902 return pos;
1903 };
1904
1905 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1906 const u8 *src, const u8 *dst,
1907 u32 ratemask,
1908 struct ieee80211_channel *chan,
1909 const u8 *ssid, size_t ssid_len,
1910 const u8 *ie, size_t ie_len,
1911 u32 flags)
1912 {
1913 struct ieee80211_local *local = sdata->local;
1914 struct cfg80211_chan_def chandef;
1915 struct sk_buff *skb;
1916 struct ieee80211_mgmt *mgmt;
1917 int ies_len;
1918 u32 rate_masks[NUM_NL80211_BANDS] = {};
1919 struct ieee80211_scan_ies dummy_ie_desc;
1920
1921 /*
1922 * Do not send DS Channel parameter for directed probe requests
1923 * in order to maximize the chance that we get a response. Some
1924 * badly-behaved APs don't respond when this parameter is included.
1925 */
1926 chandef.width = sdata->vif.bss_conf.chandef.width;
1927 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1928 chandef.chan = NULL;
1929 else
1930 chandef.chan = chan;
1931
1932 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1933 100 + ie_len);
1934 if (!skb)
1935 return NULL;
1936
1937 rate_masks[chan->band] = ratemask;
1938 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1939 skb_tailroom(skb), &dummy_ie_desc,
1940 ie, ie_len, BIT(chan->band),
1941 rate_masks, &chandef, flags);
1942 skb_put(skb, ies_len);
1943
1944 if (dst) {
1945 mgmt = (struct ieee80211_mgmt *) skb->data;
1946 memcpy(mgmt->da, dst, ETH_ALEN);
1947 memcpy(mgmt->bssid, dst, ETH_ALEN);
1948 }
1949
1950 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1951
1952 return skb;
1953 }
1954
1955 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1956 struct ieee802_11_elems *elems,
1957 enum nl80211_band band, u32 *basic_rates)
1958 {
1959 struct ieee80211_supported_band *sband;
1960 size_t num_rates;
1961 u32 supp_rates, rate_flags;
1962 int i, j, shift;
1963
1964 sband = sdata->local->hw.wiphy->bands[band];
1965 if (WARN_ON(!sband))
1966 return 1;
1967
1968 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1969 shift = ieee80211_vif_get_shift(&sdata->vif);
1970
1971 num_rates = sband->n_bitrates;
1972 supp_rates = 0;
1973 for (i = 0; i < elems->supp_rates_len +
1974 elems->ext_supp_rates_len; i++) {
1975 u8 rate = 0;
1976 int own_rate;
1977 bool is_basic;
1978 if (i < elems->supp_rates_len)
1979 rate = elems->supp_rates[i];
1980 else if (elems->ext_supp_rates)
1981 rate = elems->ext_supp_rates
1982 [i - elems->supp_rates_len];
1983 own_rate = 5 * (rate & 0x7f);
1984 is_basic = !!(rate & 0x80);
1985
1986 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1987 continue;
1988
1989 for (j = 0; j < num_rates; j++) {
1990 int brate;
1991 if ((rate_flags & sband->bitrates[j].flags)
1992 != rate_flags)
1993 continue;
1994
1995 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1996 1 << shift);
1997
1998 if (brate == own_rate) {
1999 supp_rates |= BIT(j);
2000 if (basic_rates && is_basic)
2001 *basic_rates |= BIT(j);
2002 }
2003 }
2004 }
2005 return supp_rates;
2006 }
2007
2008 void ieee80211_stop_device(struct ieee80211_local *local)
2009 {
2010 ieee80211_led_radio(local, false);
2011 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2012
2013 cancel_work_sync(&local->reconfig_filter);
2014
2015 flush_workqueue(local->workqueue);
2016 drv_stop(local);
2017 }
2018
2019 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2020 bool aborted)
2021 {
2022 /* It's possible that we don't handle the scan completion in
2023 * time during suspend, so if it's still marked as completed
2024 * here, queue the work and flush it to clean things up.
2025 * Instead of calling the worker function directly here, we
2026 * really queue it to avoid potential races with other flows
2027 * scheduling the same work.
2028 */
2029 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2030 /* If coming from reconfiguration failure, abort the scan so
2031 * we don't attempt to continue a partial HW scan - which is
2032 * possible otherwise if (e.g.) the 2.4 GHz portion was the
2033 * completed scan, and a 5 GHz portion is still pending.
2034 */
2035 if (aborted)
2036 set_bit(SCAN_ABORTED, &local->scanning);
2037 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2038 flush_delayed_work(&local->scan_work);
2039 }
2040 }
2041
2042 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2043 {
2044 struct ieee80211_sub_if_data *sdata;
2045 struct ieee80211_chanctx *ctx;
2046
2047 /*
2048 * We get here if during resume the device can't be restarted properly.
2049 * We might also get here if this happens during HW reset, which is a
2050 * slightly different situation and we need to drop all connections in
2051 * the latter case.
2052 *
2053 * Ask cfg80211 to turn off all interfaces, this will result in more
2054 * warnings but at least we'll then get into a clean stopped state.
2055 */
2056
2057 local->resuming = false;
2058 local->suspended = false;
2059 local->in_reconfig = false;
2060
2061 ieee80211_flush_completed_scan(local, true);
2062
2063 /* scheduled scan clearly can't be running any more, but tell
2064 * cfg80211 and clear local state
2065 */
2066 ieee80211_sched_scan_end(local);
2067
2068 list_for_each_entry(sdata, &local->interfaces, list)
2069 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2070
2071 /* Mark channel contexts as not being in the driver any more to avoid
2072 * removing them from the driver during the shutdown process...
2073 */
2074 mutex_lock(&local->chanctx_mtx);
2075 list_for_each_entry(ctx, &local->chanctx_list, list)
2076 ctx->driver_present = false;
2077 mutex_unlock(&local->chanctx_mtx);
2078
2079 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2080 }
2081
2082 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2083 struct ieee80211_sub_if_data *sdata)
2084 {
2085 struct ieee80211_chanctx_conf *conf;
2086 struct ieee80211_chanctx *ctx;
2087
2088 if (!local->use_chanctx)
2089 return;
2090
2091 mutex_lock(&local->chanctx_mtx);
2092 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2093 lockdep_is_held(&local->chanctx_mtx));
2094 if (conf) {
2095 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2096 drv_assign_vif_chanctx(local, sdata, ctx);
2097 }
2098 mutex_unlock(&local->chanctx_mtx);
2099 }
2100
2101 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2102 {
2103 struct ieee80211_local *local = sdata->local;
2104 struct sta_info *sta;
2105
2106 /* add STAs back */
2107 mutex_lock(&local->sta_mtx);
2108 list_for_each_entry(sta, &local->sta_list, list) {
2109 enum ieee80211_sta_state state;
2110
2111 if (!sta->uploaded || sta->sdata != sdata)
2112 continue;
2113
2114 for (state = IEEE80211_STA_NOTEXIST;
2115 state < sta->sta_state; state++)
2116 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2117 state + 1));
2118 }
2119 mutex_unlock(&local->sta_mtx);
2120 }
2121
2122 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2123 {
2124 struct cfg80211_nan_func *func, **funcs;
2125 int res, id, i = 0;
2126
2127 res = drv_start_nan(sdata->local, sdata,
2128 &sdata->u.nan.conf);
2129 if (WARN_ON(res))
2130 return res;
2131
2132 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2133 sizeof(*funcs),
2134 GFP_KERNEL);
2135 if (!funcs)
2136 return -ENOMEM;
2137
2138 /* Add all the functions:
2139 * This is a little bit ugly. We need to call a potentially sleeping
2140 * callback for each NAN function, so we can't hold the spinlock.
2141 */
2142 spin_lock_bh(&sdata->u.nan.func_lock);
2143
2144 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2145 funcs[i++] = func;
2146
2147 spin_unlock_bh(&sdata->u.nan.func_lock);
2148
2149 for (i = 0; funcs[i]; i++) {
2150 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2151 if (WARN_ON(res))
2152 ieee80211_nan_func_terminated(&sdata->vif,
2153 funcs[i]->instance_id,
2154 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2155 GFP_KERNEL);
2156 }
2157
2158 kfree(funcs);
2159
2160 return 0;
2161 }
2162
2163 int ieee80211_reconfig(struct ieee80211_local *local)
2164 {
2165 struct ieee80211_hw *hw = &local->hw;
2166 struct ieee80211_sub_if_data *sdata;
2167 struct ieee80211_chanctx *ctx;
2168 struct sta_info *sta;
2169 int res, i;
2170 bool reconfig_due_to_wowlan = false;
2171 struct ieee80211_sub_if_data *sched_scan_sdata;
2172 struct cfg80211_sched_scan_request *sched_scan_req;
2173 bool sched_scan_stopped = false;
2174 bool suspended = local->suspended;
2175
2176 /* nothing to do if HW shouldn't run */
2177 if (!local->open_count)
2178 goto wake_up;
2179
2180 #ifdef CONFIG_PM
2181 if (suspended)
2182 local->resuming = true;
2183
2184 if (local->wowlan) {
2185 /*
2186 * In the wowlan case, both mac80211 and the device
2187 * are functional when the resume op is called, so
2188 * clear local->suspended so the device could operate
2189 * normally (e.g. pass rx frames).
2190 */
2191 local->suspended = false;
2192 res = drv_resume(local);
2193 local->wowlan = false;
2194 if (res < 0) {
2195 local->resuming = false;
2196 return res;
2197 }
2198 if (res == 0)
2199 goto wake_up;
2200 WARN_ON(res > 1);
2201 /*
2202 * res is 1, which means the driver requested
2203 * to go through a regular reset on wakeup.
2204 * restore local->suspended in this case.
2205 */
2206 reconfig_due_to_wowlan = true;
2207 local->suspended = true;
2208 }
2209 #endif
2210
2211 /*
2212 * In case of hw_restart during suspend (without wowlan),
2213 * cancel restart work, as we are reconfiguring the device
2214 * anyway.
2215 * Note that restart_work is scheduled on a frozen workqueue,
2216 * so we can't deadlock in this case.
2217 */
2218 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2219 cancel_work_sync(&local->restart_work);
2220
2221 local->started = false;
2222
2223 /*
2224 * Upon resume hardware can sometimes be goofy due to
2225 * various platform / driver / bus issues, so restarting
2226 * the device may at times not work immediately. Propagate
2227 * the error.
2228 */
2229 res = drv_start(local);
2230 if (res) {
2231 if (suspended)
2232 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2233 else
2234 WARN(1, "Hardware became unavailable during restart.\n");
2235 ieee80211_handle_reconfig_failure(local);
2236 return res;
2237 }
2238
2239 /* setup fragmentation threshold */
2240 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2241
2242 /* setup RTS threshold */
2243 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2244
2245 /* reset coverage class */
2246 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2247
2248 ieee80211_led_radio(local, true);
2249 ieee80211_mod_tpt_led_trig(local,
2250 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2251
2252 /* add interfaces */
2253 sdata = rtnl_dereference(local->monitor_sdata);
2254 if (sdata) {
2255 /* in HW restart it exists already */
2256 WARN_ON(local->resuming);
2257 res = drv_add_interface(local, sdata);
2258 if (WARN_ON(res)) {
2259 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2260 synchronize_net();
2261 kfree(sdata);
2262 }
2263 }
2264
2265 list_for_each_entry(sdata, &local->interfaces, list) {
2266 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2267 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2268 ieee80211_sdata_running(sdata)) {
2269 res = drv_add_interface(local, sdata);
2270 if (WARN_ON(res))
2271 break;
2272 }
2273 }
2274
2275 /* If adding any of the interfaces failed above, roll back and
2276 * report failure.
2277 */
2278 if (res) {
2279 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2280 list)
2281 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2282 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2283 ieee80211_sdata_running(sdata))
2284 drv_remove_interface(local, sdata);
2285 ieee80211_handle_reconfig_failure(local);
2286 return res;
2287 }
2288
2289 /* add channel contexts */
2290 if (local->use_chanctx) {
2291 mutex_lock(&local->chanctx_mtx);
2292 list_for_each_entry(ctx, &local->chanctx_list, list)
2293 if (ctx->replace_state !=
2294 IEEE80211_CHANCTX_REPLACES_OTHER)
2295 WARN_ON(drv_add_chanctx(local, ctx));
2296 mutex_unlock(&local->chanctx_mtx);
2297
2298 sdata = rtnl_dereference(local->monitor_sdata);
2299 if (sdata && ieee80211_sdata_running(sdata))
2300 ieee80211_assign_chanctx(local, sdata);
2301 }
2302
2303 /* reconfigure hardware */
2304 ieee80211_hw_config(local, ~0);
2305
2306 ieee80211_configure_filter(local);
2307
2308 /* Finally also reconfigure all the BSS information */
2309 list_for_each_entry(sdata, &local->interfaces, list) {
2310 u32 changed;
2311
2312 if (!ieee80211_sdata_running(sdata))
2313 continue;
2314
2315 ieee80211_assign_chanctx(local, sdata);
2316
2317 switch (sdata->vif.type) {
2318 case NL80211_IFTYPE_AP_VLAN:
2319 case NL80211_IFTYPE_MONITOR:
2320 break;
2321 case NL80211_IFTYPE_ADHOC:
2322 if (sdata->vif.bss_conf.ibss_joined)
2323 WARN_ON(drv_join_ibss(local, sdata));
2324 /* fall through */
2325 default:
2326 ieee80211_reconfig_stations(sdata);
2327 /* fall through */
2328 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2329 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2330 drv_conf_tx(local, sdata, i,
2331 &sdata->tx_conf[i]);
2332 break;
2333 }
2334
2335 /* common change flags for all interface types */
2336 changed = BSS_CHANGED_ERP_CTS_PROT |
2337 BSS_CHANGED_ERP_PREAMBLE |
2338 BSS_CHANGED_ERP_SLOT |
2339 BSS_CHANGED_HT |
2340 BSS_CHANGED_BASIC_RATES |
2341 BSS_CHANGED_BEACON_INT |
2342 BSS_CHANGED_BSSID |
2343 BSS_CHANGED_CQM |
2344 BSS_CHANGED_QOS |
2345 BSS_CHANGED_IDLE |
2346 BSS_CHANGED_TXPOWER |
2347 BSS_CHANGED_MCAST_RATE;
2348
2349 if (sdata->vif.mu_mimo_owner)
2350 changed |= BSS_CHANGED_MU_GROUPS;
2351
2352 switch (sdata->vif.type) {
2353 case NL80211_IFTYPE_STATION:
2354 changed |= BSS_CHANGED_ASSOC |
2355 BSS_CHANGED_ARP_FILTER |
2356 BSS_CHANGED_PS;
2357
2358 /* Re-send beacon info report to the driver */
2359 if (sdata->u.mgd.have_beacon)
2360 changed |= BSS_CHANGED_BEACON_INFO;
2361
2362 if (sdata->vif.bss_conf.max_idle_period ||
2363 sdata->vif.bss_conf.protected_keep_alive)
2364 changed |= BSS_CHANGED_KEEP_ALIVE;
2365
2366 sdata_lock(sdata);
2367 ieee80211_bss_info_change_notify(sdata, changed);
2368 sdata_unlock(sdata);
2369 break;
2370 case NL80211_IFTYPE_OCB:
2371 changed |= BSS_CHANGED_OCB;
2372 ieee80211_bss_info_change_notify(sdata, changed);
2373 break;
2374 case NL80211_IFTYPE_ADHOC:
2375 changed |= BSS_CHANGED_IBSS;
2376 /* fall through */
2377 case NL80211_IFTYPE_AP:
2378 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2379
2380 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2381 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2382 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2383 changed |= BSS_CHANGED_FTM_RESPONDER;
2384
2385 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2386 changed |= BSS_CHANGED_AP_PROBE_RESP;
2387
2388 if (rcu_access_pointer(sdata->u.ap.beacon))
2389 drv_start_ap(local, sdata);
2390 }
2391
2392 /* fall through */
2393 case NL80211_IFTYPE_MESH_POINT:
2394 if (sdata->vif.bss_conf.enable_beacon) {
2395 changed |= BSS_CHANGED_BEACON |
2396 BSS_CHANGED_BEACON_ENABLED;
2397 ieee80211_bss_info_change_notify(sdata, changed);
2398 }
2399 break;
2400 case NL80211_IFTYPE_NAN:
2401 res = ieee80211_reconfig_nan(sdata);
2402 if (res < 0) {
2403 ieee80211_handle_reconfig_failure(local);
2404 return res;
2405 }
2406 break;
2407 case NL80211_IFTYPE_WDS:
2408 case NL80211_IFTYPE_AP_VLAN:
2409 case NL80211_IFTYPE_MONITOR:
2410 case NL80211_IFTYPE_P2P_DEVICE:
2411 /* nothing to do */
2412 break;
2413 case NL80211_IFTYPE_UNSPECIFIED:
2414 case NUM_NL80211_IFTYPES:
2415 case NL80211_IFTYPE_P2P_CLIENT:
2416 case NL80211_IFTYPE_P2P_GO:
2417 WARN_ON(1);
2418 break;
2419 }
2420 }
2421
2422 ieee80211_recalc_ps(local);
2423
2424 /*
2425 * The sta might be in psm against the ap (e.g. because
2426 * this was the state before a hw restart), so we
2427 * explicitly send a null packet in order to make sure
2428 * it'll sync against the ap (and get out of psm).
2429 */
2430 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2431 list_for_each_entry(sdata, &local->interfaces, list) {
2432 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2433 continue;
2434 if (!sdata->u.mgd.associated)
2435 continue;
2436
2437 ieee80211_send_nullfunc(local, sdata, false);
2438 }
2439 }
2440
2441 /* APs are now beaconing, add back stations */
2442 mutex_lock(&local->sta_mtx);
2443 list_for_each_entry(sta, &local->sta_list, list) {
2444 enum ieee80211_sta_state state;
2445
2446 if (!sta->uploaded)
2447 continue;
2448
2449 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2450 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2451 continue;
2452
2453 for (state = IEEE80211_STA_NOTEXIST;
2454 state < sta->sta_state; state++)
2455 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2456 state + 1));
2457 }
2458 mutex_unlock(&local->sta_mtx);
2459
2460 /* add back keys */
2461 list_for_each_entry(sdata, &local->interfaces, list)
2462 ieee80211_reenable_keys(sdata);
2463
2464 /* Reconfigure sched scan if it was interrupted by FW restart */
2465 mutex_lock(&local->mtx);
2466 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2467 lockdep_is_held(&local->mtx));
2468 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2469 lockdep_is_held(&local->mtx));
2470 if (sched_scan_sdata && sched_scan_req)
2471 /*
2472 * Sched scan stopped, but we don't want to report it. Instead,
2473 * we're trying to reschedule. However, if more than one scan
2474 * plan was set, we cannot reschedule since we don't know which
2475 * scan plan was currently running (and some scan plans may have
2476 * already finished).
2477 */
2478 if (sched_scan_req->n_scan_plans > 1 ||
2479 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2480 sched_scan_req)) {
2481 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2482 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2483 sched_scan_stopped = true;
2484 }
2485 mutex_unlock(&local->mtx);
2486
2487 if (sched_scan_stopped)
2488 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2489
2490 wake_up:
2491
2492 if (local->monitors == local->open_count && local->monitors > 0)
2493 ieee80211_add_virtual_monitor(local);
2494
2495 /*
2496 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2497 * sessions can be established after a resume.
2498 *
2499 * Also tear down aggregation sessions since reconfiguring
2500 * them in a hardware restart scenario is not easily done
2501 * right now, and the hardware will have lost information
2502 * about the sessions, but we and the AP still think they
2503 * are active. This is really a workaround though.
2504 */
2505 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2506 mutex_lock(&local->sta_mtx);
2507
2508 list_for_each_entry(sta, &local->sta_list, list) {
2509 if (!local->resuming)
2510 ieee80211_sta_tear_down_BA_sessions(
2511 sta, AGG_STOP_LOCAL_REQUEST);
2512 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2513 }
2514
2515 mutex_unlock(&local->sta_mtx);
2516 }
2517
2518 if (local->in_reconfig) {
2519 local->in_reconfig = false;
2520 barrier();
2521
2522 /* Restart deferred ROCs */
2523 mutex_lock(&local->mtx);
2524 ieee80211_start_next_roc(local);
2525 mutex_unlock(&local->mtx);
2526
2527 /* Requeue all works */
2528 list_for_each_entry(sdata, &local->interfaces, list)
2529 ieee80211_queue_work(&local->hw, &sdata->work);
2530 }
2531
2532 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2533 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2534 false);
2535
2536 /*
2537 * If this is for hw restart things are still running.
2538 * We may want to change that later, however.
2539 */
2540 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2541 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2542
2543 if (!suspended)
2544 return 0;
2545
2546 #ifdef CONFIG_PM
2547 /* first set suspended false, then resuming */
2548 local->suspended = false;
2549 mb();
2550 local->resuming = false;
2551
2552 ieee80211_flush_completed_scan(local, false);
2553
2554 if (local->open_count && !reconfig_due_to_wowlan)
2555 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2556
2557 list_for_each_entry(sdata, &local->interfaces, list) {
2558 if (!ieee80211_sdata_running(sdata))
2559 continue;
2560 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2561 ieee80211_sta_restart(sdata);
2562 }
2563
2564 mod_timer(&local->sta_cleanup, jiffies + 1);
2565 #else
2566 WARN_ON(1);
2567 #endif
2568
2569 return 0;
2570 }
2571
2572 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2573 {
2574 struct ieee80211_sub_if_data *sdata;
2575 struct ieee80211_local *local;
2576 struct ieee80211_key *key;
2577
2578 if (WARN_ON(!vif))
2579 return;
2580
2581 sdata = vif_to_sdata(vif);
2582 local = sdata->local;
2583
2584 if (WARN_ON(!local->resuming))
2585 return;
2586
2587 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2588 return;
2589
2590 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2591
2592 mutex_lock(&local->key_mtx);
2593 list_for_each_entry(key, &sdata->key_list, list)
2594 key->flags |= KEY_FLAG_TAINTED;
2595 mutex_unlock(&local->key_mtx);
2596 }
2597 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2598
2599 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2600 {
2601 struct ieee80211_local *local = sdata->local;
2602 struct ieee80211_chanctx_conf *chanctx_conf;
2603 struct ieee80211_chanctx *chanctx;
2604
2605 mutex_lock(&local->chanctx_mtx);
2606
2607 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2608 lockdep_is_held(&local->chanctx_mtx));
2609
2610 /*
2611 * This function can be called from a work, thus it may be possible
2612 * that the chanctx_conf is removed (due to a disconnection, for
2613 * example).
2614 * So nothing should be done in such case.
2615 */
2616 if (!chanctx_conf)
2617 goto unlock;
2618
2619 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2620 ieee80211_recalc_smps_chanctx(local, chanctx);
2621 unlock:
2622 mutex_unlock(&local->chanctx_mtx);
2623 }
2624
2625 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2626 {
2627 struct ieee80211_local *local = sdata->local;
2628 struct ieee80211_chanctx_conf *chanctx_conf;
2629 struct ieee80211_chanctx *chanctx;
2630
2631 mutex_lock(&local->chanctx_mtx);
2632
2633 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2634 lockdep_is_held(&local->chanctx_mtx));
2635
2636 if (WARN_ON_ONCE(!chanctx_conf))
2637 goto unlock;
2638
2639 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2640 ieee80211_recalc_chanctx_min_def(local, chanctx);
2641 unlock:
2642 mutex_unlock(&local->chanctx_mtx);
2643 }
2644
2645 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2646 {
2647 size_t pos = offset;
2648
2649 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2650 pos += 2 + ies[pos + 1];
2651
2652 return pos;
2653 }
2654
2655 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2656 int rssi_min_thold,
2657 int rssi_max_thold)
2658 {
2659 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2660
2661 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2662 return;
2663
2664 /*
2665 * Scale up threshold values before storing it, as the RSSI averaging
2666 * algorithm uses a scaled up value as well. Change this scaling
2667 * factor if the RSSI averaging algorithm changes.
2668 */
2669 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2670 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2671 }
2672
2673 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2674 int rssi_min_thold,
2675 int rssi_max_thold)
2676 {
2677 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2678
2679 WARN_ON(rssi_min_thold == rssi_max_thold ||
2680 rssi_min_thold > rssi_max_thold);
2681
2682 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2683 rssi_max_thold);
2684 }
2685 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2686
2687 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2688 {
2689 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2690
2691 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2692 }
2693 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2694
2695 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2696 u16 cap)
2697 {
2698 __le16 tmp;
2699
2700 *pos++ = WLAN_EID_HT_CAPABILITY;
2701 *pos++ = sizeof(struct ieee80211_ht_cap);
2702 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2703
2704 /* capability flags */
2705 tmp = cpu_to_le16(cap);
2706 memcpy(pos, &tmp, sizeof(u16));
2707 pos += sizeof(u16);
2708
2709 /* AMPDU parameters */
2710 *pos++ = ht_cap->ampdu_factor |
2711 (ht_cap->ampdu_density <<
2712 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2713
2714 /* MCS set */
2715 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2716 pos += sizeof(ht_cap->mcs);
2717
2718 /* extended capabilities */
2719 pos += sizeof(__le16);
2720
2721 /* BF capabilities */
2722 pos += sizeof(__le32);
2723
2724 /* antenna selection */
2725 pos += sizeof(u8);
2726
2727 return pos;
2728 }
2729
2730 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2731 u32 cap)
2732 {
2733 __le32 tmp;
2734
2735 *pos++ = WLAN_EID_VHT_CAPABILITY;
2736 *pos++ = sizeof(struct ieee80211_vht_cap);
2737 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2738
2739 /* capability flags */
2740 tmp = cpu_to_le32(cap);
2741 memcpy(pos, &tmp, sizeof(u32));
2742 pos += sizeof(u32);
2743
2744 /* VHT MCS set */
2745 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2746 pos += sizeof(vht_cap->vht_mcs);
2747
2748 return pos;
2749 }
2750
2751 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2752 {
2753 const struct ieee80211_sta_he_cap *he_cap;
2754 struct ieee80211_supported_band *sband;
2755 u8 n;
2756
2757 sband = ieee80211_get_sband(sdata);
2758 if (!sband)
2759 return 0;
2760
2761 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2762 if (!he_cap)
2763 return 0;
2764
2765 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2766 return 2 + 1 +
2767 sizeof(he_cap->he_cap_elem) + n +
2768 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2769 he_cap->he_cap_elem.phy_cap_info);
2770 }
2771
2772 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2773 const struct ieee80211_sta_he_cap *he_cap,
2774 u8 *end)
2775 {
2776 u8 n;
2777 u8 ie_len;
2778 u8 *orig_pos = pos;
2779
2780 /* Make sure we have place for the IE */
2781 /*
2782 * TODO: the 1 added is because this temporarily is under the EXTENSION
2783 * IE. Get rid of it when it moves.
2784 */
2785 if (!he_cap)
2786 return orig_pos;
2787
2788 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2789 ie_len = 2 + 1 +
2790 sizeof(he_cap->he_cap_elem) + n +
2791 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2792 he_cap->he_cap_elem.phy_cap_info);
2793
2794 if ((end - pos) < ie_len)
2795 return orig_pos;
2796
2797 *pos++ = WLAN_EID_EXTENSION;
2798 pos++; /* We'll set the size later below */
2799 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2800
2801 /* Fixed data */
2802 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2803 pos += sizeof(he_cap->he_cap_elem);
2804
2805 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2806 pos += n;
2807
2808 /* Check if PPE Threshold should be present */
2809 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2810 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2811 goto end;
2812
2813 /*
2814 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2815 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2816 */
2817 n = hweight8(he_cap->ppe_thres[0] &
2818 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2819 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2820 IEEE80211_PPE_THRES_NSS_POS));
2821
2822 /*
2823 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2824 * total size.
2825 */
2826 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2827 n = DIV_ROUND_UP(n, 8);
2828
2829 /* Copy PPE Thresholds */
2830 memcpy(pos, &he_cap->ppe_thres, n);
2831 pos += n;
2832
2833 end:
2834 orig_pos[1] = (pos - orig_pos) - 2;
2835 return pos;
2836 }
2837
2838 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2839 const struct cfg80211_chan_def *chandef,
2840 u16 prot_mode, bool rifs_mode)
2841 {
2842 struct ieee80211_ht_operation *ht_oper;
2843 /* Build HT Information */
2844 *pos++ = WLAN_EID_HT_OPERATION;
2845 *pos++ = sizeof(struct ieee80211_ht_operation);
2846 ht_oper = (struct ieee80211_ht_operation *)pos;
2847 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2848 chandef->chan->center_freq);
2849 switch (chandef->width) {
2850 case NL80211_CHAN_WIDTH_160:
2851 case NL80211_CHAN_WIDTH_80P80:
2852 case NL80211_CHAN_WIDTH_80:
2853 case NL80211_CHAN_WIDTH_40:
2854 if (chandef->center_freq1 > chandef->chan->center_freq)
2855 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2856 else
2857 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2858 break;
2859 default:
2860 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2861 break;
2862 }
2863 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2864 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2865 chandef->width != NL80211_CHAN_WIDTH_20)
2866 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2867
2868 if (rifs_mode)
2869 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2870
2871 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2872 ht_oper->stbc_param = 0x0000;
2873
2874 /* It seems that Basic MCS set and Supported MCS set
2875 are identical for the first 10 bytes */
2876 memset(&ht_oper->basic_set, 0, 16);
2877 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2878
2879 return pos + sizeof(struct ieee80211_ht_operation);
2880 }
2881
2882 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2883 const struct cfg80211_chan_def *chandef)
2884 {
2885 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2886 *pos++ = 3; /* IE length */
2887 /* New channel width */
2888 switch (chandef->width) {
2889 case NL80211_CHAN_WIDTH_80:
2890 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2891 break;
2892 case NL80211_CHAN_WIDTH_160:
2893 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2894 break;
2895 case NL80211_CHAN_WIDTH_80P80:
2896 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2897 break;
2898 default:
2899 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2900 }
2901
2902 /* new center frequency segment 0 */
2903 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2904 /* new center frequency segment 1 */
2905 if (chandef->center_freq2)
2906 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2907 else
2908 *pos++ = 0;
2909 }
2910
2911 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2912 const struct cfg80211_chan_def *chandef)
2913 {
2914 struct ieee80211_vht_operation *vht_oper;
2915
2916 *pos++ = WLAN_EID_VHT_OPERATION;
2917 *pos++ = sizeof(struct ieee80211_vht_operation);
2918 vht_oper = (struct ieee80211_vht_operation *)pos;
2919 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2920 chandef->center_freq1);
2921 if (chandef->center_freq2)
2922 vht_oper->center_freq_seg1_idx =
2923 ieee80211_frequency_to_channel(chandef->center_freq2);
2924 else
2925 vht_oper->center_freq_seg1_idx = 0x00;
2926
2927 switch (chandef->width) {
2928 case NL80211_CHAN_WIDTH_160:
2929 /*
2930 * Convert 160 MHz channel width to new style as interop
2931 * workaround.
2932 */
2933 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2934 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2935 if (chandef->chan->center_freq < chandef->center_freq1)
2936 vht_oper->center_freq_seg0_idx -= 8;
2937 else
2938 vht_oper->center_freq_seg0_idx += 8;
2939 break;
2940 case NL80211_CHAN_WIDTH_80P80:
2941 /*
2942 * Convert 80+80 MHz channel width to new style as interop
2943 * workaround.
2944 */
2945 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2946 break;
2947 case NL80211_CHAN_WIDTH_80:
2948 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2949 break;
2950 default:
2951 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2952 break;
2953 }
2954
2955 /* don't require special VHT peer rates */
2956 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2957
2958 return pos + sizeof(struct ieee80211_vht_operation);
2959 }
2960
2961 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2962 {
2963 struct ieee80211_he_operation *he_oper;
2964 u32 he_oper_params;
2965
2966 *pos++ = WLAN_EID_EXTENSION;
2967 *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2968 *pos++ = WLAN_EID_EXT_HE_OPERATION;
2969
2970 he_oper_params = 0;
2971 he_oper_params |= u32_encode_bits(1023, /* disabled */
2972 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2973 he_oper_params |= u32_encode_bits(1,
2974 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2975 he_oper_params |= u32_encode_bits(1,
2976 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2977
2978 he_oper = (struct ieee80211_he_operation *)pos;
2979 he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2980
2981 /* don't require special HE peer rates */
2982 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2983
2984 /* TODO add VHT operational and 6GHz operational subelement? */
2985
2986 return pos + sizeof(struct ieee80211_vht_operation);
2987 }
2988
2989 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2990 struct cfg80211_chan_def *chandef)
2991 {
2992 enum nl80211_channel_type channel_type;
2993
2994 if (!ht_oper)
2995 return false;
2996
2997 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2998 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2999 channel_type = NL80211_CHAN_HT20;
3000 break;
3001 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3002 channel_type = NL80211_CHAN_HT40PLUS;
3003 break;
3004 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3005 channel_type = NL80211_CHAN_HT40MINUS;
3006 break;
3007 default:
3008 channel_type = NL80211_CHAN_NO_HT;
3009 return false;
3010 }
3011
3012 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3013 return true;
3014 }
3015
3016 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
3017 const struct ieee80211_vht_operation *oper,
3018 const struct ieee80211_ht_operation *htop,
3019 struct cfg80211_chan_def *chandef)
3020 {
3021 struct cfg80211_chan_def new = *chandef;
3022 int cf0, cf1;
3023 int ccfs0, ccfs1, ccfs2;
3024 int ccf0, ccf1;
3025 u32 vht_cap;
3026 bool support_80_80 = false;
3027 bool support_160 = false;
3028
3029 if (!oper || !htop)
3030 return false;
3031
3032 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3033 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3034 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3035 support_80_80 = ((vht_cap &
3036 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3037 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3038 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3039 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3040 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3041 ccfs0 = oper->center_freq_seg0_idx;
3042 ccfs1 = oper->center_freq_seg1_idx;
3043 ccfs2 = (le16_to_cpu(htop->operation_mode) &
3044 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3045 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3046
3047 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3048 ccf0 = ccfs0;
3049 ccf1 = ccfs1;
3050 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3051 ccf1 = ccfs2;
3052
3053 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3054 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3055
3056 switch (oper->chan_width) {
3057 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3058 /* just use HT information directly */
3059 break;
3060 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3061 new.width = NL80211_CHAN_WIDTH_80;
3062 new.center_freq1 = cf0;
3063 /* If needed, adjust based on the newer interop workaround. */
3064 if (ccf1) {
3065 unsigned int diff;
3066
3067 diff = abs(ccf1 - ccf0);
3068 if ((diff == 8) && support_160) {
3069 new.width = NL80211_CHAN_WIDTH_160;
3070 new.center_freq1 = cf1;
3071 } else if ((diff > 8) && support_80_80) {
3072 new.width = NL80211_CHAN_WIDTH_80P80;
3073 new.center_freq2 = cf1;
3074 }
3075 }
3076 break;
3077 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3078 /* deprecated encoding */
3079 new.width = NL80211_CHAN_WIDTH_160;
3080 new.center_freq1 = cf0;
3081 break;
3082 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3083 /* deprecated encoding */
3084 new.width = NL80211_CHAN_WIDTH_80P80;
3085 new.center_freq1 = cf0;
3086 new.center_freq2 = cf1;
3087 break;
3088 default:
3089 return false;
3090 }
3091
3092 if (!cfg80211_chandef_valid(&new))
3093 return false;
3094
3095 *chandef = new;
3096 return true;
3097 }
3098
3099 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3100 const struct ieee80211_supported_band *sband,
3101 const u8 *srates, int srates_len, u32 *rates)
3102 {
3103 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3104 int shift = ieee80211_chandef_get_shift(chandef);
3105 struct ieee80211_rate *br;
3106 int brate, rate, i, j, count = 0;
3107
3108 *rates = 0;
3109
3110 for (i = 0; i < srates_len; i++) {
3111 rate = srates[i] & 0x7f;
3112
3113 for (j = 0; j < sband->n_bitrates; j++) {
3114 br = &sband->bitrates[j];
3115 if ((rate_flags & br->flags) != rate_flags)
3116 continue;
3117
3118 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3119 if (brate == rate) {
3120 *rates |= BIT(j);
3121 count++;
3122 break;
3123 }
3124 }
3125 }
3126 return count;
3127 }
3128
3129 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3130 struct sk_buff *skb, bool need_basic,
3131 enum nl80211_band band)
3132 {
3133 struct ieee80211_local *local = sdata->local;
3134 struct ieee80211_supported_band *sband;
3135 int rate, shift;
3136 u8 i, rates, *pos;
3137 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3138 u32 rate_flags;
3139
3140 shift = ieee80211_vif_get_shift(&sdata->vif);
3141 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3142 sband = local->hw.wiphy->bands[band];
3143 rates = 0;
3144 for (i = 0; i < sband->n_bitrates; i++) {
3145 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3146 continue;
3147 rates++;
3148 }
3149 if (rates > 8)
3150 rates = 8;
3151
3152 if (skb_tailroom(skb) < rates + 2)
3153 return -ENOMEM;
3154
3155 pos = skb_put(skb, rates + 2);
3156 *pos++ = WLAN_EID_SUPP_RATES;
3157 *pos++ = rates;
3158 for (i = 0; i < rates; i++) {
3159 u8 basic = 0;
3160 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3161 continue;
3162
3163 if (need_basic && basic_rates & BIT(i))
3164 basic = 0x80;
3165 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3166 5 * (1 << shift));
3167 *pos++ = basic | (u8) rate;
3168 }
3169
3170 return 0;
3171 }
3172
3173 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3174 struct sk_buff *skb, bool need_basic,
3175 enum nl80211_band band)
3176 {
3177 struct ieee80211_local *local = sdata->local;
3178 struct ieee80211_supported_band *sband;
3179 int rate, shift;
3180 u8 i, exrates, *pos;
3181 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3182 u32 rate_flags;
3183
3184 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3185 shift = ieee80211_vif_get_shift(&sdata->vif);
3186
3187 sband = local->hw.wiphy->bands[band];
3188 exrates = 0;
3189 for (i = 0; i < sband->n_bitrates; i++) {
3190 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3191 continue;
3192 exrates++;
3193 }
3194
3195 if (exrates > 8)
3196 exrates -= 8;
3197 else
3198 exrates = 0;
3199
3200 if (skb_tailroom(skb) < exrates + 2)
3201 return -ENOMEM;
3202
3203 if (exrates) {
3204 pos = skb_put(skb, exrates + 2);
3205 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3206 *pos++ = exrates;
3207 for (i = 8; i < sband->n_bitrates; i++) {
3208 u8 basic = 0;
3209 if ((rate_flags & sband->bitrates[i].flags)
3210 != rate_flags)
3211 continue;
3212 if (need_basic && basic_rates & BIT(i))
3213 basic = 0x80;
3214 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3215 5 * (1 << shift));
3216 *pos++ = basic | (u8) rate;
3217 }
3218 }
3219 return 0;
3220 }
3221
3222 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3223 {
3224 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3226
3227 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3228 /* non-managed type inferfaces */
3229 return 0;
3230 }
3231 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3232 }
3233 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3234
3235 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3236 {
3237 if (!mcs)
3238 return 1;
3239
3240 /* TODO: consider rx_highest */
3241
3242 if (mcs->rx_mask[3])
3243 return 4;
3244 if (mcs->rx_mask[2])
3245 return 3;
3246 if (mcs->rx_mask[1])
3247 return 2;
3248 return 1;
3249 }
3250
3251 /**
3252 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3253 * @local: mac80211 hw info struct
3254 * @status: RX status
3255 * @mpdu_len: total MPDU length (including FCS)
3256 * @mpdu_offset: offset into MPDU to calculate timestamp at
3257 *
3258 * This function calculates the RX timestamp at the given MPDU offset, taking
3259 * into account what the RX timestamp was. An offset of 0 will just normalize
3260 * the timestamp to TSF at beginning of MPDU reception.
3261 */
3262 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3263 struct ieee80211_rx_status *status,
3264 unsigned int mpdu_len,
3265 unsigned int mpdu_offset)
3266 {
3267 u64 ts = status->mactime;
3268 struct rate_info ri;
3269 u16 rate;
3270
3271 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3272 return 0;
3273
3274 memset(&ri, 0, sizeof(ri));
3275
3276 ri.bw = status->bw;
3277
3278 /* Fill cfg80211 rate info */
3279 switch (status->encoding) {
3280 case RX_ENC_HT:
3281 ri.mcs = status->rate_idx;
3282 ri.flags |= RATE_INFO_FLAGS_MCS;
3283 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3284 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3285 break;
3286 case RX_ENC_VHT:
3287 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3288 ri.mcs = status->rate_idx;
3289 ri.nss = status->nss;
3290 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3291 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3292 break;
3293 default:
3294 WARN_ON(1);
3295 /* fall through */
3296 case RX_ENC_LEGACY: {
3297 struct ieee80211_supported_band *sband;
3298 int shift = 0;
3299 int bitrate;
3300
3301 switch (status->bw) {
3302 case RATE_INFO_BW_10:
3303 shift = 1;
3304 break;
3305 case RATE_INFO_BW_5:
3306 shift = 2;
3307 break;
3308 }
3309
3310 sband = local->hw.wiphy->bands[status->band];
3311 bitrate = sband->bitrates[status->rate_idx].bitrate;
3312 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3313
3314 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3315 /* TODO: handle HT/VHT preambles */
3316 if (status->band == NL80211_BAND_5GHZ) {
3317 ts += 20 << shift;
3318 mpdu_offset += 2;
3319 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3320 ts += 96;
3321 } else {
3322 ts += 192;
3323 }
3324 }
3325 break;
3326 }
3327 }
3328
3329 rate = cfg80211_calculate_bitrate(&ri);
3330 if (WARN_ONCE(!rate,
3331 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3332 (unsigned long long)status->flag, status->rate_idx,
3333 status->nss))
3334 return 0;
3335
3336 /* rewind from end of MPDU */
3337 if (status->flag & RX_FLAG_MACTIME_END)
3338 ts -= mpdu_len * 8 * 10 / rate;
3339
3340 ts += mpdu_offset * 8 * 10 / rate;
3341
3342 return ts;
3343 }
3344
3345 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3346 {
3347 struct ieee80211_sub_if_data *sdata;
3348 struct cfg80211_chan_def chandef;
3349
3350 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3351 ASSERT_RTNL();
3352
3353 mutex_lock(&local->mtx);
3354 list_for_each_entry(sdata, &local->interfaces, list) {
3355 /* it might be waiting for the local->mtx, but then
3356 * by the time it gets it, sdata->wdev.cac_started
3357 * will no longer be true
3358 */
3359 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3360
3361 if (sdata->wdev.cac_started) {
3362 chandef = sdata->vif.bss_conf.chandef;
3363 ieee80211_vif_release_channel(sdata);
3364 cfg80211_cac_event(sdata->dev,
3365 &chandef,
3366 NL80211_RADAR_CAC_ABORTED,
3367 GFP_KERNEL);
3368 }
3369 }
3370 mutex_unlock(&local->mtx);
3371 }
3372
3373 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3374 {
3375 struct ieee80211_local *local =
3376 container_of(work, struct ieee80211_local, radar_detected_work);
3377 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3378 struct ieee80211_chanctx *ctx;
3379 int num_chanctx = 0;
3380
3381 mutex_lock(&local->chanctx_mtx);
3382 list_for_each_entry(ctx, &local->chanctx_list, list) {
3383 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3384 continue;
3385
3386 num_chanctx++;
3387 chandef = ctx->conf.def;
3388 }
3389 mutex_unlock(&local->chanctx_mtx);
3390
3391 rtnl_lock();
3392 ieee80211_dfs_cac_cancel(local);
3393 rtnl_unlock();
3394
3395 if (num_chanctx > 1)
3396 /* XXX: multi-channel is not supported yet */
3397 WARN_ON(1);
3398 else
3399 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3400 }
3401
3402 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3403 {
3404 struct ieee80211_local *local = hw_to_local(hw);
3405
3406 trace_api_radar_detected(local);
3407
3408 schedule_work(&local->radar_detected_work);
3409 }
3410 EXPORT_SYMBOL(ieee80211_radar_detected);
3411
3412 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3413 {
3414 u32 ret;
3415 int tmp;
3416
3417 switch (c->width) {
3418 case NL80211_CHAN_WIDTH_20:
3419 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3420 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3421 break;
3422 case NL80211_CHAN_WIDTH_40:
3423 c->width = NL80211_CHAN_WIDTH_20;
3424 c->center_freq1 = c->chan->center_freq;
3425 ret = IEEE80211_STA_DISABLE_40MHZ |
3426 IEEE80211_STA_DISABLE_VHT;
3427 break;
3428 case NL80211_CHAN_WIDTH_80:
3429 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3430 /* n_P40 */
3431 tmp /= 2;
3432 /* freq_P40 */
3433 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3434 c->width = NL80211_CHAN_WIDTH_40;
3435 ret = IEEE80211_STA_DISABLE_VHT;
3436 break;
3437 case NL80211_CHAN_WIDTH_80P80:
3438 c->center_freq2 = 0;
3439 c->width = NL80211_CHAN_WIDTH_80;
3440 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3441 IEEE80211_STA_DISABLE_160MHZ;
3442 break;
3443 case NL80211_CHAN_WIDTH_160:
3444 /* n_P20 */
3445 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3446 /* n_P80 */
3447 tmp /= 4;
3448 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3449 c->width = NL80211_CHAN_WIDTH_80;
3450 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3451 IEEE80211_STA_DISABLE_160MHZ;
3452 break;
3453 default:
3454 case NL80211_CHAN_WIDTH_20_NOHT:
3455 WARN_ON_ONCE(1);
3456 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3457 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3458 break;
3459 case NL80211_CHAN_WIDTH_5:
3460 case NL80211_CHAN_WIDTH_10:
3461 WARN_ON_ONCE(1);
3462 /* keep c->width */
3463 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3464 break;
3465 }
3466
3467 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3468
3469 return ret;
3470 }
3471
3472 /*
3473 * Returns true if smps_mode_new is strictly more restrictive than
3474 * smps_mode_old.
3475 */
3476 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3477 enum ieee80211_smps_mode smps_mode_new)
3478 {
3479 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3480 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3481 return false;
3482
3483 switch (smps_mode_old) {
3484 case IEEE80211_SMPS_STATIC:
3485 return false;
3486 case IEEE80211_SMPS_DYNAMIC:
3487 return smps_mode_new == IEEE80211_SMPS_STATIC;
3488 case IEEE80211_SMPS_OFF:
3489 return smps_mode_new != IEEE80211_SMPS_OFF;
3490 default:
3491 WARN_ON(1);
3492 }
3493
3494 return false;
3495 }
3496
3497 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3498 struct cfg80211_csa_settings *csa_settings)
3499 {
3500 struct sk_buff *skb;
3501 struct ieee80211_mgmt *mgmt;
3502 struct ieee80211_local *local = sdata->local;
3503 int freq;
3504 int hdr_len = offsetofend(struct ieee80211_mgmt,
3505 u.action.u.chan_switch);
3506 u8 *pos;
3507
3508 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3509 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3510 return -EOPNOTSUPP;
3511
3512 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3513 5 + /* channel switch announcement element */
3514 3 + /* secondary channel offset element */
3515 5 + /* wide bandwidth channel switch announcement */
3516 8); /* mesh channel switch parameters element */
3517 if (!skb)
3518 return -ENOMEM;
3519
3520 skb_reserve(skb, local->tx_headroom);
3521 mgmt = skb_put_zero(skb, hdr_len);
3522 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3523 IEEE80211_STYPE_ACTION);
3524
3525 eth_broadcast_addr(mgmt->da);
3526 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3527 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3528 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3529 } else {
3530 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3531 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3532 }
3533 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3534 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3535 pos = skb_put(skb, 5);
3536 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3537 *pos++ = 3; /* IE length */
3538 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3539 freq = csa_settings->chandef.chan->center_freq;
3540 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3541 *pos++ = csa_settings->count; /* count */
3542
3543 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3544 enum nl80211_channel_type ch_type;
3545
3546 skb_put(skb, 3);
3547 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3548 *pos++ = 1; /* IE length */
3549 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3550 if (ch_type == NL80211_CHAN_HT40PLUS)
3551 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3552 else
3553 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3554 }
3555
3556 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3557 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3558
3559 skb_put(skb, 8);
3560 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3561 *pos++ = 6; /* IE length */
3562 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3563 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3564 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3565 *pos++ |= csa_settings->block_tx ?
3566 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3567 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3568 pos += 2;
3569 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3570 pos += 2;
3571 }
3572
3573 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3574 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3575 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3576 skb_put(skb, 5);
3577 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3578 }
3579
3580 ieee80211_tx_skb(sdata, skb);
3581 return 0;
3582 }
3583
3584 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3585 {
3586 return !(cs == NULL || cs->cipher == 0 ||
3587 cs->hdr_len < cs->pn_len + cs->pn_off ||
3588 cs->hdr_len <= cs->key_idx_off ||
3589 cs->key_idx_shift > 7 ||
3590 cs->key_idx_mask == 0);
3591 }
3592
3593 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3594 {
3595 int i;
3596
3597 /* Ensure we have enough iftype bitmap space for all iftype values */
3598 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3599
3600 for (i = 0; i < n; i++)
3601 if (!ieee80211_cs_valid(&cs[i]))
3602 return false;
3603
3604 return true;
3605 }
3606
3607 const struct ieee80211_cipher_scheme *
3608 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3609 enum nl80211_iftype iftype)
3610 {
3611 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3612 int n = local->hw.n_cipher_schemes;
3613 int i;
3614 const struct ieee80211_cipher_scheme *cs = NULL;
3615
3616 for (i = 0; i < n; i++) {
3617 if (l[i].cipher == cipher) {
3618 cs = &l[i];
3619 break;
3620 }
3621 }
3622
3623 if (!cs || !(cs->iftype & BIT(iftype)))
3624 return NULL;
3625
3626 return cs;
3627 }
3628
3629 int ieee80211_cs_headroom(struct ieee80211_local *local,
3630 struct cfg80211_crypto_settings *crypto,
3631 enum nl80211_iftype iftype)
3632 {
3633 const struct ieee80211_cipher_scheme *cs;
3634 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3635 int i;
3636
3637 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3638 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3639 iftype);
3640
3641 if (cs && headroom < cs->hdr_len)
3642 headroom = cs->hdr_len;
3643 }
3644
3645 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3646 if (cs && headroom < cs->hdr_len)
3647 headroom = cs->hdr_len;
3648
3649 return headroom;
3650 }
3651
3652 static bool
3653 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3654 {
3655 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3656 int skip;
3657
3658 if (end > 0)
3659 return false;
3660
3661 /* One shot NOA */
3662 if (data->count[i] == 1)
3663 return false;
3664
3665 if (data->desc[i].interval == 0)
3666 return false;
3667
3668 /* End time is in the past, check for repetitions */
3669 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3670 if (data->count[i] < 255) {
3671 if (data->count[i] <= skip) {
3672 data->count[i] = 0;
3673 return false;
3674 }
3675
3676 data->count[i] -= skip;
3677 }
3678
3679 data->desc[i].start += skip * data->desc[i].interval;
3680
3681 return true;
3682 }
3683
3684 static bool
3685 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3686 s32 *offset)
3687 {
3688 bool ret = false;
3689 int i;
3690
3691 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3692 s32 cur;
3693
3694 if (!data->count[i])
3695 continue;
3696
3697 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3698 ret = true;
3699
3700 cur = data->desc[i].start - tsf;
3701 if (cur > *offset)
3702 continue;
3703
3704 cur = data->desc[i].start + data->desc[i].duration - tsf;
3705 if (cur > *offset)
3706 *offset = cur;
3707 }
3708
3709 return ret;
3710 }
3711
3712 static u32
3713 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3714 {
3715 s32 offset = 0;
3716 int tries = 0;
3717 /*
3718 * arbitrary limit, used to avoid infinite loops when combined NoA
3719 * descriptors cover the full time period.
3720 */
3721 int max_tries = 5;
3722
3723 ieee80211_extend_absent_time(data, tsf, &offset);
3724 do {
3725 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3726 break;
3727
3728 tries++;
3729 } while (tries < max_tries);
3730
3731 return offset;
3732 }
3733
3734 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3735 {
3736 u32 next_offset = BIT(31) - 1;
3737 int i;
3738
3739 data->absent = 0;
3740 data->has_next_tsf = false;
3741 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3742 s32 start;
3743
3744 if (!data->count[i])
3745 continue;
3746
3747 ieee80211_extend_noa_desc(data, tsf, i);
3748 start = data->desc[i].start - tsf;
3749 if (start <= 0)
3750 data->absent |= BIT(i);
3751
3752 if (next_offset > start)
3753 next_offset = start;
3754
3755 data->has_next_tsf = true;
3756 }
3757
3758 if (data->absent)
3759 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3760
3761 data->next_tsf = tsf + next_offset;
3762 }
3763 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3764
3765 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3766 struct ieee80211_noa_data *data, u32 tsf)
3767 {
3768 int ret = 0;
3769 int i;
3770
3771 memset(data, 0, sizeof(*data));
3772
3773 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3774 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3775
3776 if (!desc->count || !desc->duration)
3777 continue;
3778
3779 data->count[i] = desc->count;
3780 data->desc[i].start = le32_to_cpu(desc->start_time);
3781 data->desc[i].duration = le32_to_cpu(desc->duration);
3782 data->desc[i].interval = le32_to_cpu(desc->interval);
3783
3784 if (data->count[i] > 1 &&
3785 data->desc[i].interval < data->desc[i].duration)
3786 continue;
3787
3788 ieee80211_extend_noa_desc(data, tsf, i);
3789 ret++;
3790 }
3791
3792 if (ret)
3793 ieee80211_update_p2p_noa(data, tsf);
3794
3795 return ret;
3796 }
3797 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3798
3799 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3800 struct ieee80211_sub_if_data *sdata)
3801 {
3802 u64 tsf = drv_get_tsf(local, sdata);
3803 u64 dtim_count = 0;
3804 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3805 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3806 struct ps_data *ps;
3807 u8 bcns_from_dtim;
3808
3809 if (tsf == -1ULL || !beacon_int || !dtim_period)
3810 return;
3811
3812 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3813 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3814 if (!sdata->bss)
3815 return;
3816
3817 ps = &sdata->bss->ps;
3818 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3819 ps = &sdata->u.mesh.ps;
3820 } else {
3821 return;
3822 }
3823
3824 /*
3825 * actually finds last dtim_count, mac80211 will update in
3826 * __beacon_add_tim().
3827 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3828 */
3829 do_div(tsf, beacon_int);
3830 bcns_from_dtim = do_div(tsf, dtim_period);
3831 /* just had a DTIM */
3832 if (!bcns_from_dtim)
3833 dtim_count = 0;
3834 else
3835 dtim_count = dtim_period - bcns_from_dtim;
3836
3837 ps->dtim_count = dtim_count;
3838 }
3839
3840 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3841 struct ieee80211_chanctx *ctx)
3842 {
3843 struct ieee80211_sub_if_data *sdata;
3844 u8 radar_detect = 0;
3845
3846 lockdep_assert_held(&local->chanctx_mtx);
3847
3848 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3849 return 0;
3850
3851 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3852 if (sdata->reserved_radar_required)
3853 radar_detect |= BIT(sdata->reserved_chandef.width);
3854
3855 /*
3856 * An in-place reservation context should not have any assigned vifs
3857 * until it replaces the other context.
3858 */
3859 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3860 !list_empty(&ctx->assigned_vifs));
3861
3862 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3863 if (sdata->radar_required)
3864 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3865
3866 return radar_detect;
3867 }
3868
3869 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3870 const struct cfg80211_chan_def *chandef,
3871 enum ieee80211_chanctx_mode chanmode,
3872 u8 radar_detect)
3873 {
3874 struct ieee80211_local *local = sdata->local;
3875 struct ieee80211_sub_if_data *sdata_iter;
3876 enum nl80211_iftype iftype = sdata->wdev.iftype;
3877 struct ieee80211_chanctx *ctx;
3878 int total = 1;
3879 struct iface_combination_params params = {
3880 .radar_detect = radar_detect,
3881 };
3882
3883 lockdep_assert_held(&local->chanctx_mtx);
3884
3885 if (WARN_ON(hweight32(radar_detect) > 1))
3886 return -EINVAL;
3887
3888 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3889 !chandef->chan))
3890 return -EINVAL;
3891
3892 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3893 return -EINVAL;
3894
3895 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3896 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3897 /*
3898 * always passing this is harmless, since it'll be the
3899 * same value that cfg80211 finds if it finds the same
3900 * interface ... and that's always allowed
3901 */
3902 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3903 }
3904
3905 /* Always allow software iftypes */
3906 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3907 if (radar_detect)
3908 return -EINVAL;
3909 return 0;
3910 }
3911
3912 if (chandef)
3913 params.num_different_channels = 1;
3914
3915 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3916 params.iftype_num[iftype] = 1;
3917
3918 list_for_each_entry(ctx, &local->chanctx_list, list) {
3919 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3920 continue;
3921 params.radar_detect |=
3922 ieee80211_chanctx_radar_detect(local, ctx);
3923 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3924 params.num_different_channels++;
3925 continue;
3926 }
3927 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3928 cfg80211_chandef_compatible(chandef,
3929 &ctx->conf.def))
3930 continue;
3931 params.num_different_channels++;
3932 }
3933
3934 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3935 struct wireless_dev *wdev_iter;
3936
3937 wdev_iter = &sdata_iter->wdev;
3938
3939 if (sdata_iter == sdata ||
3940 !ieee80211_sdata_running(sdata_iter) ||
3941 cfg80211_iftype_allowed(local->hw.wiphy,
3942 wdev_iter->iftype, 0, 1))
3943 continue;
3944
3945 params.iftype_num[wdev_iter->iftype]++;
3946 total++;
3947 }
3948
3949 if (total == 1 && !params.radar_detect)
3950 return 0;
3951
3952 return cfg80211_check_combinations(local->hw.wiphy, &params);
3953 }
3954
3955 static void
3956 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3957 void *data)
3958 {
3959 u32 *max_num_different_channels = data;
3960
3961 *max_num_different_channels = max(*max_num_different_channels,
3962 c->num_different_channels);
3963 }
3964
3965 int ieee80211_max_num_channels(struct ieee80211_local *local)
3966 {
3967 struct ieee80211_sub_if_data *sdata;
3968 struct ieee80211_chanctx *ctx;
3969 u32 max_num_different_channels = 1;
3970 int err;
3971 struct iface_combination_params params = {0};
3972
3973 lockdep_assert_held(&local->chanctx_mtx);
3974
3975 list_for_each_entry(ctx, &local->chanctx_list, list) {
3976 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3977 continue;
3978
3979 params.num_different_channels++;
3980
3981 params.radar_detect |=
3982 ieee80211_chanctx_radar_detect(local, ctx);
3983 }
3984
3985 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3986 params.iftype_num[sdata->wdev.iftype]++;
3987
3988 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3989 ieee80211_iter_max_chans,
3990 &max_num_different_channels);
3991 if (err < 0)
3992 return err;
3993
3994 return max_num_different_channels;
3995 }
3996
3997 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3998 {
3999 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4000 *buf++ = 7; /* len */
4001 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4002 *buf++ = 0x50;
4003 *buf++ = 0xf2;
4004 *buf++ = 2; /* WME */
4005 *buf++ = 0; /* WME info */
4006 *buf++ = 1; /* WME ver */
4007 *buf++ = qosinfo; /* U-APSD no in use */
4008
4009 return buf;
4010 }
4011
4012 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4013 unsigned long *frame_cnt,
4014 unsigned long *byte_cnt)
4015 {
4016 struct txq_info *txqi = to_txq_info(txq);
4017 u32 frag_cnt = 0, frag_bytes = 0;
4018 struct sk_buff *skb;
4019
4020 skb_queue_walk(&txqi->frags, skb) {
4021 frag_cnt++;
4022 frag_bytes += skb->len;
4023 }
4024
4025 if (frame_cnt)
4026 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4027
4028 if (byte_cnt)
4029 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4030 }
4031 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4032
4033 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4034 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4035 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4036 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4037 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4038 };
Linux with added FPC-III support