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media: vicodec: add V4L2_CID_MIN_BUFFERS_FOR_OUTPUT
[linux/fpc-iii.git] / net / mac80211 / util.c
blobcba4633cd6cfd02a838450bad524465579b18f8d
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2019 Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * utilities for mac80211
15 */
16
17 #include <net/mac80211.h>
18 #include <linux/netdevice.h>
19 #include <linux/export.h>
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/bitmap.h>
26 #include <linux/crc32.h>
27 #include <net/net_namespace.h>
28 #include <net/cfg80211.h>
29 #include <net/rtnetlink.h>
30
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
33 #include "rate.h"
34 #include "mesh.h"
35 #include "wme.h"
36 #include "led.h"
37 #include "wep.h"
38
39 /* privid for wiphys to determine whether they belong to us or not */
40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41
42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43 {
44 struct ieee80211_local *local;
45 BUG_ON(!wiphy);
46
47 local = wiphy_priv(wiphy);
48 return &local->hw;
49 }
50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51
52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
53 {
54 struct sk_buff *skb;
55 struct ieee80211_hdr *hdr;
56
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
60 }
61 }
62
63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
65 int shift)
66 {
67 int dur;
68
69 /* calculate duration (in microseconds, rounded up to next higher
70 * integer if it includes a fractional microsecond) to send frame of
71 * len bytes (does not include FCS) at the given rate. Duration will
72 * also include SIFS.
73 *
74 * rate is in 100 kbps, so divident is multiplied by 10 in the
75 * DIV_ROUND_UP() operations.
76 *
77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
78 * is assumed to be 0 otherwise.
79 */
80
81 if (band == NL80211_BAND_5GHZ || erp) {
82 /*
83 * OFDM:
84 *
85 * N_DBPS = DATARATE x 4
86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
87 * (16 = SIGNAL time, 6 = tail bits)
88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
89 *
90 * T_SYM = 4 usec
91 * 802.11a - 18.5.2: aSIFSTime = 16 usec
92 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
93 * signal ext = 6 usec
94 */
95 dur = 16; /* SIFS + signal ext */
96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98
99 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 4 for 5 MHz
101 * * times 2 for 10 MHz
102 */
103 dur *= 1 << shift;
104
105 /* rates should already consider the channel bandwidth,
106 * don't apply divisor again.
107 */
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate); /* T_SYM x N_SYM */
110 } else {
111 /*
112 * 802.11b or 802.11g with 802.11b compatibility:
113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 *
116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117 * aSIFSTime = 10 usec
118 * aPreambleLength = 144 usec or 72 usec with short preamble
119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 */
121 dur = 10; /* aSIFSTime = 10 usec */
122 dur += short_preamble ? (72 + 24) : (144 + 48);
123
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
125 }
126
127 return dur;
128 }
129
130 /* Exported duration function for driver use */
131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
134 size_t frame_len,
135 struct ieee80211_rate *rate)
136 {
137 struct ieee80211_sub_if_data *sdata;
138 u16 dur;
139 int erp, shift = 0;
140 bool short_preamble = false;
141
142 erp = 0;
143 if (vif) {
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
149 }
150
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
153
154 return cpu_to_le16(dur);
155 }
156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157
158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
161 {
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
165 bool short_preamble;
166 int erp, shift = 0, bitrate;
167 u16 dur;
168 struct ieee80211_supported_band *sband;
169
170 sband = local->hw.wiphy->bands[frame_txctl->band];
171
172 short_preamble = false;
173
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
175
176 erp = 0;
177 if (vif) {
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
183 }
184
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
186
187 /* CTS duration */
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190 /* Data frame duration */
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
193 /* ACK duration */
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
196
197 return cpu_to_le16(dur);
198 }
199 EXPORT_SYMBOL(ieee80211_rts_duration);
200
201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
203 size_t frame_len,
204 const struct ieee80211_tx_info *frame_txctl)
205 {
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
209 bool short_preamble;
210 int erp, shift = 0, bitrate;
211 u16 dur;
212 struct ieee80211_supported_band *sband;
213
214 sband = local->hw.wiphy->bands[frame_txctl->band];
215
216 short_preamble = false;
217
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
219 erp = 0;
220 if (vif) {
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
226 }
227
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229
230 /* Data frame duration */
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234 /* ACK duration */
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 }
238
239 return cpu_to_le16(dur);
240 }
241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242
243 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
244 {
245 struct ieee80211_local *local = sdata->local;
246 struct ieee80211_vif *vif = &sdata->vif;
247 struct fq *fq = &local->fq;
248 struct ps_data *ps = NULL;
249 struct txq_info *txqi;
250 struct sta_info *sta;
251 int i;
252
253 spin_lock_bh(&fq->lock);
254
255 if (sdata->vif.type == NL80211_IFTYPE_AP)
256 ps = &sdata->bss->ps;
257
258 sdata->vif.txqs_stopped[ac] = false;
259
260 list_for_each_entry_rcu(sta, &local->sta_list, list) {
261 if (sdata != sta->sdata)
262 continue;
263
264 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
265 struct ieee80211_txq *txq = sta->sta.txq[i];
266
267 if (!txq)
268 continue;
269
270 txqi = to_txq_info(txq);
271
272 if (ac != txq->ac)
273 continue;
274
275 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
276 &txqi->flags))
277 continue;
278
279 spin_unlock_bh(&fq->lock);
280 drv_wake_tx_queue(local, txqi);
281 spin_lock_bh(&fq->lock);
282 }
283 }
284
285 if (!vif->txq)
286 goto out;
287
288 txqi = to_txq_info(vif->txq);
289
290 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
291 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
292 goto out;
293
294 spin_unlock_bh(&fq->lock);
295
296 drv_wake_tx_queue(local, txqi);
297 return;
298 out:
299 spin_unlock_bh(&fq->lock);
300 }
301
302 static void
303 __releases(&local->queue_stop_reason_lock)
304 __acquires(&local->queue_stop_reason_lock)
305 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
306 {
307 struct ieee80211_sub_if_data *sdata;
308 int n_acs = IEEE80211_NUM_ACS;
309 int i;
310
311 rcu_read_lock();
312
313 if (local->hw.queues < IEEE80211_NUM_ACS)
314 n_acs = 1;
315
316 for (i = 0; i < local->hw.queues; i++) {
317 if (local->queue_stop_reasons[i])
318 continue;
319
320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
321 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
322 int ac;
323
324 for (ac = 0; ac < n_acs; ac++) {
325 int ac_queue = sdata->vif.hw_queue[ac];
326
327 if (ac_queue == i ||
328 sdata->vif.cab_queue == i)
329 __ieee80211_wake_txqs(sdata, ac);
330 }
331 }
332 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
333 }
334
335 rcu_read_unlock();
336 }
337
338 void ieee80211_wake_txqs(unsigned long data)
339 {
340 struct ieee80211_local *local = (struct ieee80211_local *)data;
341 unsigned long flags;
342
343 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
344 _ieee80211_wake_txqs(local, &flags);
345 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
346 }
347
348 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
349 {
350 struct ieee80211_sub_if_data *sdata;
351 int n_acs = IEEE80211_NUM_ACS;
352
353 if (local->ops->wake_tx_queue)
354 return;
355
356 if (local->hw.queues < IEEE80211_NUM_ACS)
357 n_acs = 1;
358
359 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
360 int ac;
361
362 if (!sdata->dev)
363 continue;
364
365 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
366 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
367 continue;
368
369 for (ac = 0; ac < n_acs; ac++) {
370 int ac_queue = sdata->vif.hw_queue[ac];
371
372 if (ac_queue == queue ||
373 (sdata->vif.cab_queue == queue &&
374 local->queue_stop_reasons[ac_queue] == 0 &&
375 skb_queue_empty(&local->pending[ac_queue])))
376 netif_wake_subqueue(sdata->dev, ac);
377 }
378 }
379 }
380
381 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
382 enum queue_stop_reason reason,
383 bool refcounted,
384 unsigned long *flags)
385 {
386 struct ieee80211_local *local = hw_to_local(hw);
387
388 trace_wake_queue(local, queue, reason);
389
390 if (WARN_ON(queue >= hw->queues))
391 return;
392
393 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
394 return;
395
396 if (!refcounted) {
397 local->q_stop_reasons[queue][reason] = 0;
398 } else {
399 local->q_stop_reasons[queue][reason]--;
400 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
401 local->q_stop_reasons[queue][reason] = 0;
402 }
403
404 if (local->q_stop_reasons[queue][reason] == 0)
405 __clear_bit(reason, &local->queue_stop_reasons[queue]);
406
407 if (local->queue_stop_reasons[queue] != 0)
408 /* someone still has this queue stopped */
409 return;
410
411 if (skb_queue_empty(&local->pending[queue])) {
412 rcu_read_lock();
413 ieee80211_propagate_queue_wake(local, queue);
414 rcu_read_unlock();
415 } else
416 tasklet_schedule(&local->tx_pending_tasklet);
417
418 /*
419 * Calling _ieee80211_wake_txqs here can be a problem because it may
420 * release queue_stop_reason_lock which has been taken by
421 * __ieee80211_wake_queue's caller. It is certainly not very nice to
422 * release someone's lock, but it is fine because all the callers of
423 * __ieee80211_wake_queue call it right before releasing the lock.
424 */
425 if (local->ops->wake_tx_queue) {
426 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
427 tasklet_schedule(&local->wake_txqs_tasklet);
428 else
429 _ieee80211_wake_txqs(local, flags);
430 }
431 }
432
433 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
434 enum queue_stop_reason reason,
435 bool refcounted)
436 {
437 struct ieee80211_local *local = hw_to_local(hw);
438 unsigned long flags;
439
440 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
441 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
442 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
443 }
444
445 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
446 {
447 ieee80211_wake_queue_by_reason(hw, queue,
448 IEEE80211_QUEUE_STOP_REASON_DRIVER,
449 false);
450 }
451 EXPORT_SYMBOL(ieee80211_wake_queue);
452
453 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
454 enum queue_stop_reason reason,
455 bool refcounted)
456 {
457 struct ieee80211_local *local = hw_to_local(hw);
458 struct ieee80211_sub_if_data *sdata;
459 int n_acs = IEEE80211_NUM_ACS;
460
461 trace_stop_queue(local, queue, reason);
462
463 if (WARN_ON(queue >= hw->queues))
464 return;
465
466 if (!refcounted)
467 local->q_stop_reasons[queue][reason] = 1;
468 else
469 local->q_stop_reasons[queue][reason]++;
470
471 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
472 return;
473
474 if (local->hw.queues < IEEE80211_NUM_ACS)
475 n_acs = 1;
476
477 rcu_read_lock();
478 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
479 int ac;
480
481 if (!sdata->dev)
482 continue;
483
484 for (ac = 0; ac < n_acs; ac++) {
485 if (sdata->vif.hw_queue[ac] == queue ||
486 sdata->vif.cab_queue == queue) {
487 if (!local->ops->wake_tx_queue) {
488 netif_stop_subqueue(sdata->dev, ac);
489 continue;
490 }
491 spin_lock(&local->fq.lock);
492 sdata->vif.txqs_stopped[ac] = true;
493 spin_unlock(&local->fq.lock);
494 }
495 }
496 }
497 rcu_read_unlock();
498 }
499
500 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
501 enum queue_stop_reason reason,
502 bool refcounted)
503 {
504 struct ieee80211_local *local = hw_to_local(hw);
505 unsigned long flags;
506
507 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
508 __ieee80211_stop_queue(hw, queue, reason, refcounted);
509 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
510 }
511
512 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
513 {
514 ieee80211_stop_queue_by_reason(hw, queue,
515 IEEE80211_QUEUE_STOP_REASON_DRIVER,
516 false);
517 }
518 EXPORT_SYMBOL(ieee80211_stop_queue);
519
520 void ieee80211_add_pending_skb(struct ieee80211_local *local,
521 struct sk_buff *skb)
522 {
523 struct ieee80211_hw *hw = &local->hw;
524 unsigned long flags;
525 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
526 int queue = info->hw_queue;
527
528 if (WARN_ON(!info->control.vif)) {
529 ieee80211_free_txskb(&local->hw, skb);
530 return;
531 }
532
533 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
534 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
535 false);
536 __skb_queue_tail(&local->pending[queue], skb);
537 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
538 false, &flags);
539 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
540 }
541
542 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
543 struct sk_buff_head *skbs)
544 {
545 struct ieee80211_hw *hw = &local->hw;
546 struct sk_buff *skb;
547 unsigned long flags;
548 int queue, i;
549
550 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
551 while ((skb = skb_dequeue(skbs))) {
552 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
553
554 if (WARN_ON(!info->control.vif)) {
555 ieee80211_free_txskb(&local->hw, skb);
556 continue;
557 }
558
559 queue = info->hw_queue;
560
561 __ieee80211_stop_queue(hw, queue,
562 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
563 false);
564
565 __skb_queue_tail(&local->pending[queue], skb);
566 }
567
568 for (i = 0; i < hw->queues; i++)
569 __ieee80211_wake_queue(hw, i,
570 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
571 false, &flags);
572 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
573 }
574
575 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
576 unsigned long queues,
577 enum queue_stop_reason reason,
578 bool refcounted)
579 {
580 struct ieee80211_local *local = hw_to_local(hw);
581 unsigned long flags;
582 int i;
583
584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
585
586 for_each_set_bit(i, &queues, hw->queues)
587 __ieee80211_stop_queue(hw, i, reason, refcounted);
588
589 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
590 }
591
592 void ieee80211_stop_queues(struct ieee80211_hw *hw)
593 {
594 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
595 IEEE80211_QUEUE_STOP_REASON_DRIVER,
596 false);
597 }
598 EXPORT_SYMBOL(ieee80211_stop_queues);
599
600 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
601 {
602 struct ieee80211_local *local = hw_to_local(hw);
603 unsigned long flags;
604 int ret;
605
606 if (WARN_ON(queue >= hw->queues))
607 return true;
608
609 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
610 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
611 &local->queue_stop_reasons[queue]);
612 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
613 return ret;
614 }
615 EXPORT_SYMBOL(ieee80211_queue_stopped);
616
617 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
618 unsigned long queues,
619 enum queue_stop_reason reason,
620 bool refcounted)
621 {
622 struct ieee80211_local *local = hw_to_local(hw);
623 unsigned long flags;
624 int i;
625
626 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
627
628 for_each_set_bit(i, &queues, hw->queues)
629 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
630
631 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
632 }
633
634 void ieee80211_wake_queues(struct ieee80211_hw *hw)
635 {
636 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
637 IEEE80211_QUEUE_STOP_REASON_DRIVER,
638 false);
639 }
640 EXPORT_SYMBOL(ieee80211_wake_queues);
641
642 static unsigned int
643 ieee80211_get_vif_queues(struct ieee80211_local *local,
644 struct ieee80211_sub_if_data *sdata)
645 {
646 unsigned int queues;
647
648 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
649 int ac;
650
651 queues = 0;
652
653 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
654 queues |= BIT(sdata->vif.hw_queue[ac]);
655 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
656 queues |= BIT(sdata->vif.cab_queue);
657 } else {
658 /* all queues */
659 queues = BIT(local->hw.queues) - 1;
660 }
661
662 return queues;
663 }
664
665 void __ieee80211_flush_queues(struct ieee80211_local *local,
666 struct ieee80211_sub_if_data *sdata,
667 unsigned int queues, bool drop)
668 {
669 if (!local->ops->flush)
670 return;
671
672 /*
673 * If no queue was set, or if the HW doesn't support
674 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
675 */
676 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
677 queues = ieee80211_get_vif_queues(local, sdata);
678
679 ieee80211_stop_queues_by_reason(&local->hw, queues,
680 IEEE80211_QUEUE_STOP_REASON_FLUSH,
681 false);
682
683 drv_flush(local, sdata, queues, drop);
684
685 ieee80211_wake_queues_by_reason(&local->hw, queues,
686 IEEE80211_QUEUE_STOP_REASON_FLUSH,
687 false);
688 }
689
690 void ieee80211_flush_queues(struct ieee80211_local *local,
691 struct ieee80211_sub_if_data *sdata, bool drop)
692 {
693 __ieee80211_flush_queues(local, sdata, 0, drop);
694 }
695
696 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
697 struct ieee80211_sub_if_data *sdata,
698 enum queue_stop_reason reason)
699 {
700 ieee80211_stop_queues_by_reason(&local->hw,
701 ieee80211_get_vif_queues(local, sdata),
702 reason, true);
703 }
704
705 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
706 struct ieee80211_sub_if_data *sdata,
707 enum queue_stop_reason reason)
708 {
709 ieee80211_wake_queues_by_reason(&local->hw,
710 ieee80211_get_vif_queues(local, sdata),
711 reason, true);
712 }
713
714 static void __iterate_interfaces(struct ieee80211_local *local,
715 u32 iter_flags,
716 void (*iterator)(void *data, u8 *mac,
717 struct ieee80211_vif *vif),
718 void *data)
719 {
720 struct ieee80211_sub_if_data *sdata;
721 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
722
723 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
724 switch (sdata->vif.type) {
725 case NL80211_IFTYPE_MONITOR:
726 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
727 continue;
728 break;
729 case NL80211_IFTYPE_AP_VLAN:
730 continue;
731 default:
732 break;
733 }
734 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
735 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
736 continue;
737 if (ieee80211_sdata_running(sdata) || !active_only)
738 iterator(data, sdata->vif.addr,
739 &sdata->vif);
740 }
741
742 sdata = rcu_dereference_check(local->monitor_sdata,
743 lockdep_is_held(&local->iflist_mtx) ||
744 lockdep_rtnl_is_held());
745 if (sdata &&
746 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
747 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
748 iterator(data, sdata->vif.addr, &sdata->vif);
749 }
750
751 void ieee80211_iterate_interfaces(
752 struct ieee80211_hw *hw, u32 iter_flags,
753 void (*iterator)(void *data, u8 *mac,
754 struct ieee80211_vif *vif),
755 void *data)
756 {
757 struct ieee80211_local *local = hw_to_local(hw);
758
759 mutex_lock(&local->iflist_mtx);
760 __iterate_interfaces(local, iter_flags, iterator, data);
761 mutex_unlock(&local->iflist_mtx);
762 }
763 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
764
765 void ieee80211_iterate_active_interfaces_atomic(
766 struct ieee80211_hw *hw, u32 iter_flags,
767 void (*iterator)(void *data, u8 *mac,
768 struct ieee80211_vif *vif),
769 void *data)
770 {
771 struct ieee80211_local *local = hw_to_local(hw);
772
773 rcu_read_lock();
774 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
775 iterator, data);
776 rcu_read_unlock();
777 }
778 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
779
780 void ieee80211_iterate_active_interfaces_rtnl(
781 struct ieee80211_hw *hw, u32 iter_flags,
782 void (*iterator)(void *data, u8 *mac,
783 struct ieee80211_vif *vif),
784 void *data)
785 {
786 struct ieee80211_local *local = hw_to_local(hw);
787
788 ASSERT_RTNL();
789
790 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
791 iterator, data);
792 }
793 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
794
795 static void __iterate_stations(struct ieee80211_local *local,
796 void (*iterator)(void *data,
797 struct ieee80211_sta *sta),
798 void *data)
799 {
800 struct sta_info *sta;
801
802 list_for_each_entry_rcu(sta, &local->sta_list, list) {
803 if (!sta->uploaded)
804 continue;
805
806 iterator(data, &sta->sta);
807 }
808 }
809
810 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
811 void (*iterator)(void *data,
812 struct ieee80211_sta *sta),
813 void *data)
814 {
815 struct ieee80211_local *local = hw_to_local(hw);
816
817 rcu_read_lock();
818 __iterate_stations(local, iterator, data);
819 rcu_read_unlock();
820 }
821 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
822
823 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
824 {
825 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
826
827 if (!ieee80211_sdata_running(sdata) ||
828 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
829 return NULL;
830 return &sdata->vif;
831 }
832 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
833
834 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
835 {
836 struct ieee80211_sub_if_data *sdata;
837
838 if (!vif)
839 return NULL;
840
841 sdata = vif_to_sdata(vif);
842
843 if (!ieee80211_sdata_running(sdata) ||
844 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
845 return NULL;
846
847 return &sdata->wdev;
848 }
849 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
850
851 /*
852 * Nothing should have been stuffed into the workqueue during
853 * the suspend->resume cycle. Since we can't check each caller
854 * of this function if we are already quiescing / suspended,
855 * check here and don't WARN since this can actually happen when
856 * the rx path (for example) is racing against __ieee80211_suspend
857 * and suspending / quiescing was set after the rx path checked
858 * them.
859 */
860 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
861 {
862 if (local->quiescing || (local->suspended && !local->resuming)) {
863 pr_warn("queueing ieee80211 work while going to suspend\n");
864 return false;
865 }
866
867 return true;
868 }
869
870 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
871 {
872 struct ieee80211_local *local = hw_to_local(hw);
873
874 if (!ieee80211_can_queue_work(local))
875 return;
876
877 queue_work(local->workqueue, work);
878 }
879 EXPORT_SYMBOL(ieee80211_queue_work);
880
881 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
882 struct delayed_work *dwork,
883 unsigned long delay)
884 {
885 struct ieee80211_local *local = hw_to_local(hw);
886
887 if (!ieee80211_can_queue_work(local))
888 return;
889
890 queue_delayed_work(local->workqueue, dwork, delay);
891 }
892 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
893
894 static u32
895 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
896 struct ieee802_11_elems *elems,
897 u64 filter, u32 crc,
898 const struct element *check_inherit)
899 {
900 const struct element *elem;
901 bool calc_crc = filter != 0;
902 DECLARE_BITMAP(seen_elems, 256);
903 const u8 *ie;
904
905 bitmap_zero(seen_elems, 256);
906
907 for_each_element(elem, start, len) {
908 bool elem_parse_failed;
909 u8 id = elem->id;
910 u8 elen = elem->datalen;
911 const u8 *pos = elem->data;
912
913 if (check_inherit &&
914 !cfg80211_is_element_inherited(elem,
915 check_inherit))
916 continue;
917
918 switch (id) {
919 case WLAN_EID_SSID:
920 case WLAN_EID_SUPP_RATES:
921 case WLAN_EID_FH_PARAMS:
922 case WLAN_EID_DS_PARAMS:
923 case WLAN_EID_CF_PARAMS:
924 case WLAN_EID_TIM:
925 case WLAN_EID_IBSS_PARAMS:
926 case WLAN_EID_CHALLENGE:
927 case WLAN_EID_RSN:
928 case WLAN_EID_ERP_INFO:
929 case WLAN_EID_EXT_SUPP_RATES:
930 case WLAN_EID_HT_CAPABILITY:
931 case WLAN_EID_HT_OPERATION:
932 case WLAN_EID_VHT_CAPABILITY:
933 case WLAN_EID_VHT_OPERATION:
934 case WLAN_EID_MESH_ID:
935 case WLAN_EID_MESH_CONFIG:
936 case WLAN_EID_PEER_MGMT:
937 case WLAN_EID_PREQ:
938 case WLAN_EID_PREP:
939 case WLAN_EID_PERR:
940 case WLAN_EID_RANN:
941 case WLAN_EID_CHANNEL_SWITCH:
942 case WLAN_EID_EXT_CHANSWITCH_ANN:
943 case WLAN_EID_COUNTRY:
944 case WLAN_EID_PWR_CONSTRAINT:
945 case WLAN_EID_TIMEOUT_INTERVAL:
946 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
947 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
948 case WLAN_EID_CHAN_SWITCH_PARAM:
949 case WLAN_EID_EXT_CAPABILITY:
950 case WLAN_EID_CHAN_SWITCH_TIMING:
951 case WLAN_EID_LINK_ID:
952 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
953 /*
954 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
955 * that if the content gets bigger it might be needed more than once
956 */
957 if (test_bit(id, seen_elems)) {
958 elems->parse_error = true;
959 continue;
960 }
961 break;
962 }
963
964 if (calc_crc && id < 64 && (filter & (1ULL << id)))
965 crc = crc32_be(crc, pos - 2, elen + 2);
966
967 elem_parse_failed = false;
968
969 switch (id) {
970 case WLAN_EID_LINK_ID:
971 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
972 elem_parse_failed = true;
973 break;
974 }
975 elems->lnk_id = (void *)(pos - 2);
976 break;
977 case WLAN_EID_CHAN_SWITCH_TIMING:
978 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
979 elem_parse_failed = true;
980 break;
981 }
982 elems->ch_sw_timing = (void *)pos;
983 break;
984 case WLAN_EID_EXT_CAPABILITY:
985 elems->ext_capab = pos;
986 elems->ext_capab_len = elen;
987 break;
988 case WLAN_EID_SSID:
989 elems->ssid = pos;
990 elems->ssid_len = elen;
991 break;
992 case WLAN_EID_SUPP_RATES:
993 elems->supp_rates = pos;
994 elems->supp_rates_len = elen;
995 break;
996 case WLAN_EID_DS_PARAMS:
997 if (elen >= 1)
998 elems->ds_params = pos;
999 else
1000 elem_parse_failed = true;
1001 break;
1002 case WLAN_EID_TIM:
1003 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1004 elems->tim = (void *)pos;
1005 elems->tim_len = elen;
1006 } else
1007 elem_parse_failed = true;
1008 break;
1009 case WLAN_EID_CHALLENGE:
1010 elems->challenge = pos;
1011 elems->challenge_len = elen;
1012 break;
1013 case WLAN_EID_VENDOR_SPECIFIC:
1014 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1015 pos[2] == 0xf2) {
1016 /* Microsoft OUI (00:50:F2) */
1017
1018 if (calc_crc)
1019 crc = crc32_be(crc, pos - 2, elen + 2);
1020
1021 if (elen >= 5 && pos[3] == 2) {
1022 /* OUI Type 2 - WMM IE */
1023 if (pos[4] == 0) {
1024 elems->wmm_info = pos;
1025 elems->wmm_info_len = elen;
1026 } else if (pos[4] == 1) {
1027 elems->wmm_param = pos;
1028 elems->wmm_param_len = elen;
1029 }
1030 }
1031 }
1032 break;
1033 case WLAN_EID_RSN:
1034 elems->rsn = pos;
1035 elems->rsn_len = elen;
1036 break;
1037 case WLAN_EID_ERP_INFO:
1038 if (elen >= 1)
1039 elems->erp_info = pos;
1040 else
1041 elem_parse_failed = true;
1042 break;
1043 case WLAN_EID_EXT_SUPP_RATES:
1044 elems->ext_supp_rates = pos;
1045 elems->ext_supp_rates_len = elen;
1046 break;
1047 case WLAN_EID_HT_CAPABILITY:
1048 if (elen >= sizeof(struct ieee80211_ht_cap))
1049 elems->ht_cap_elem = (void *)pos;
1050 else
1051 elem_parse_failed = true;
1052 break;
1053 case WLAN_EID_HT_OPERATION:
1054 if (elen >= sizeof(struct ieee80211_ht_operation))
1055 elems->ht_operation = (void *)pos;
1056 else
1057 elem_parse_failed = true;
1058 break;
1059 case WLAN_EID_VHT_CAPABILITY:
1060 if (elen >= sizeof(struct ieee80211_vht_cap))
1061 elems->vht_cap_elem = (void *)pos;
1062 else
1063 elem_parse_failed = true;
1064 break;
1065 case WLAN_EID_VHT_OPERATION:
1066 if (elen >= sizeof(struct ieee80211_vht_operation))
1067 elems->vht_operation = (void *)pos;
1068 else
1069 elem_parse_failed = true;
1070 break;
1071 case WLAN_EID_OPMODE_NOTIF:
1072 if (elen > 0)
1073 elems->opmode_notif = pos;
1074 else
1075 elem_parse_failed = true;
1076 break;
1077 case WLAN_EID_MESH_ID:
1078 elems->mesh_id = pos;
1079 elems->mesh_id_len = elen;
1080 break;
1081 case WLAN_EID_MESH_CONFIG:
1082 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1083 elems->mesh_config = (void *)pos;
1084 else
1085 elem_parse_failed = true;
1086 break;
1087 case WLAN_EID_PEER_MGMT:
1088 elems->peering = pos;
1089 elems->peering_len = elen;
1090 break;
1091 case WLAN_EID_MESH_AWAKE_WINDOW:
1092 if (elen >= 2)
1093 elems->awake_window = (void *)pos;
1094 break;
1095 case WLAN_EID_PREQ:
1096 elems->preq = pos;
1097 elems->preq_len = elen;
1098 break;
1099 case WLAN_EID_PREP:
1100 elems->prep = pos;
1101 elems->prep_len = elen;
1102 break;
1103 case WLAN_EID_PERR:
1104 elems->perr = pos;
1105 elems->perr_len = elen;
1106 break;
1107 case WLAN_EID_RANN:
1108 if (elen >= sizeof(struct ieee80211_rann_ie))
1109 elems->rann = (void *)pos;
1110 else
1111 elem_parse_failed = true;
1112 break;
1113 case WLAN_EID_CHANNEL_SWITCH:
1114 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1115 elem_parse_failed = true;
1116 break;
1117 }
1118 elems->ch_switch_ie = (void *)pos;
1119 break;
1120 case WLAN_EID_EXT_CHANSWITCH_ANN:
1121 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1122 elem_parse_failed = true;
1123 break;
1124 }
1125 elems->ext_chansw_ie = (void *)pos;
1126 break;
1127 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1128 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1129 elem_parse_failed = true;
1130 break;
1131 }
1132 elems->sec_chan_offs = (void *)pos;
1133 break;
1134 case WLAN_EID_CHAN_SWITCH_PARAM:
1135 if (elen !=
1136 sizeof(*elems->mesh_chansw_params_ie)) {
1137 elem_parse_failed = true;
1138 break;
1139 }
1140 elems->mesh_chansw_params_ie = (void *)pos;
1141 break;
1142 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1143 if (!action ||
1144 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1145 elem_parse_failed = true;
1146 break;
1147 }
1148 elems->wide_bw_chansw_ie = (void *)pos;
1149 break;
1150 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1151 if (action) {
1152 elem_parse_failed = true;
1153 break;
1154 }
1155 /*
1156 * This is a bit tricky, but as we only care about
1157 * the wide bandwidth channel switch element, so
1158 * just parse it out manually.
1159 */
1160 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1161 pos, elen);
1162 if (ie) {
1163 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1164 elems->wide_bw_chansw_ie =
1165 (void *)(ie + 2);
1166 else
1167 elem_parse_failed = true;
1168 }
1169 break;
1170 case WLAN_EID_COUNTRY:
1171 elems->country_elem = pos;
1172 elems->country_elem_len = elen;
1173 break;
1174 case WLAN_EID_PWR_CONSTRAINT:
1175 if (elen != 1) {
1176 elem_parse_failed = true;
1177 break;
1178 }
1179 elems->pwr_constr_elem = pos;
1180 break;
1181 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1182 /* Lots of different options exist, but we only care
1183 * about the Dynamic Transmit Power Control element.
1184 * First check for the Cisco OUI, then for the DTPC
1185 * tag (0x00).
1186 */
1187 if (elen < 4) {
1188 elem_parse_failed = true;
1189 break;
1190 }
1191
1192 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1193 pos[2] != 0x96 || pos[3] != 0x00)
1194 break;
1195
1196 if (elen != 6) {
1197 elem_parse_failed = true;
1198 break;
1199 }
1200
1201 if (calc_crc)
1202 crc = crc32_be(crc, pos - 2, elen + 2);
1203
1204 elems->cisco_dtpc_elem = pos;
1205 break;
1206 case WLAN_EID_TIMEOUT_INTERVAL:
1207 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1208 elems->timeout_int = (void *)pos;
1209 else
1210 elem_parse_failed = true;
1211 break;
1212 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1213 if (elen >= sizeof(*elems->max_idle_period_ie))
1214 elems->max_idle_period_ie = (void *)pos;
1215 break;
1216 case WLAN_EID_EXTENSION:
1217 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1218 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1219 elems->mu_edca_param_set = (void *)&pos[1];
1220 if (calc_crc)
1221 crc = crc32_be(crc, pos - 2, elen + 2);
1222 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1223 elems->he_cap = (void *)&pos[1];
1224 elems->he_cap_len = elen - 1;
1225 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1226 elen >= sizeof(*elems->he_operation) &&
1227 elen >= ieee80211_he_oper_size(&pos[1])) {
1228 elems->he_operation = (void *)&pos[1];
1229 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1230 elems->uora_element = (void *)&pos[1];
1231 } else if (pos[0] ==
1232 WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1233 elen == 4) {
1234 elems->max_channel_switch_time = pos + 1;
1235 } else if (pos[0] ==
1236 WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1237 elen == 3) {
1238 elems->mbssid_config_ie = (void *)&pos[1];
1239 }
1240 break;
1241 default:
1242 break;
1243 }
1244
1245 if (elem_parse_failed)
1246 elems->parse_error = true;
1247 else
1248 __set_bit(id, seen_elems);
1249 }
1250
1251 if (!for_each_element_completed(elem, start, len))
1252 elems->parse_error = true;
1253
1254 return crc;
1255 }
1256
1257 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1258 struct ieee802_11_elems *elems,
1259 u8 *transmitter_bssid,
1260 u8 *bss_bssid,
1261 u8 *nontransmitted_profile)
1262 {
1263 const struct element *elem, *sub;
1264 size_t profile_len = 0;
1265 bool found = false;
1266
1267 if (!bss_bssid || !transmitter_bssid)
1268 return profile_len;
1269
1270 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1271 if (elem->datalen < 2)
1272 continue;
1273
1274 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1275 u8 new_bssid[ETH_ALEN];
1276 const u8 *index;
1277
1278 if (sub->id != 0 || sub->datalen < 4) {
1279 /* not a valid BSS profile */
1280 continue;
1281 }
1282
1283 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1284 sub->data[1] != 2) {
1285 /* The first element of the
1286 * Nontransmitted BSSID Profile is not
1287 * the Nontransmitted BSSID Capability
1288 * element.
1289 */
1290 continue;
1291 }
1292
1293 memset(nontransmitted_profile, 0, len);
1294 profile_len = cfg80211_merge_profile(start, len,
1295 elem,
1296 sub,
1297 nontransmitted_profile,
1298 len);
1299
1300 /* found a Nontransmitted BSSID Profile */
1301 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1302 nontransmitted_profile,
1303 profile_len);
1304 if (!index || index[1] < 1 || index[2] == 0) {
1305 /* Invalid MBSSID Index element */
1306 continue;
1307 }
1308
1309 cfg80211_gen_new_bssid(transmitter_bssid,
1310 elem->data[0],
1311 index[2],
1312 new_bssid);
1313 if (ether_addr_equal(new_bssid, bss_bssid)) {
1314 found = true;
1315 elems->bssid_index_len = index[1];
1316 elems->bssid_index = (void *)&index[2];
1317 break;
1318 }
1319 }
1320 }
1321
1322 return found ? profile_len : 0;
1323 }
1324
1325 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1326 struct ieee802_11_elems *elems,
1327 u64 filter, u32 crc, u8 *transmitter_bssid,
1328 u8 *bss_bssid)
1329 {
1330 const struct element *non_inherit = NULL;
1331 u8 *nontransmitted_profile;
1332 int nontransmitted_profile_len = 0;
1333
1334 memset(elems, 0, sizeof(*elems));
1335 elems->ie_start = start;
1336 elems->total_len = len;
1337
1338 nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1339 if (nontransmitted_profile) {
1340 nontransmitted_profile_len =
1341 ieee802_11_find_bssid_profile(start, len, elems,
1342 transmitter_bssid,
1343 bss_bssid,
1344 nontransmitted_profile);
1345 non_inherit =
1346 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1347 nontransmitted_profile,
1348 nontransmitted_profile_len);
1349 }
1350
1351 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1352 crc, non_inherit);
1353
1354 /* Override with nontransmitted profile, if found */
1355 if (nontransmitted_profile_len)
1356 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1357 nontransmitted_profile_len,
1358 action, elems, 0, 0, NULL);
1359
1360 if (elems->tim && !elems->parse_error) {
1361 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1362
1363 elems->dtim_period = tim_ie->dtim_period;
1364 elems->dtim_count = tim_ie->dtim_count;
1365 }
1366
1367 /* Override DTIM period and count if needed */
1368 if (elems->bssid_index &&
1369 elems->bssid_index_len >=
1370 offsetofend(struct ieee80211_bssid_index, dtim_period))
1371 elems->dtim_period = elems->bssid_index->dtim_period;
1372
1373 if (elems->bssid_index &&
1374 elems->bssid_index_len >=
1375 offsetofend(struct ieee80211_bssid_index, dtim_count))
1376 elems->dtim_count = elems->bssid_index->dtim_count;
1377
1378 kfree(nontransmitted_profile);
1379
1380 return crc;
1381 }
1382
1383 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1384 struct ieee80211_tx_queue_params
1385 *qparam, int ac)
1386 {
1387 struct ieee80211_chanctx_conf *chanctx_conf;
1388 const struct ieee80211_reg_rule *rrule;
1389 const struct ieee80211_wmm_ac *wmm_ac;
1390 u16 center_freq = 0;
1391
1392 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1393 sdata->vif.type != NL80211_IFTYPE_STATION)
1394 return;
1395
1396 rcu_read_lock();
1397 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1398 if (chanctx_conf)
1399 center_freq = chanctx_conf->def.chan->center_freq;
1400
1401 if (!center_freq) {
1402 rcu_read_unlock();
1403 return;
1404 }
1405
1406 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1407
1408 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1409 rcu_read_unlock();
1410 return;
1411 }
1412
1413 if (sdata->vif.type == NL80211_IFTYPE_AP)
1414 wmm_ac = &rrule->wmm_rule.ap[ac];
1415 else
1416 wmm_ac = &rrule->wmm_rule.client[ac];
1417 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1418 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1419 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1420 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1421 rcu_read_unlock();
1422 }
1423
1424 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1425 bool bss_notify, bool enable_qos)
1426 {
1427 struct ieee80211_local *local = sdata->local;
1428 struct ieee80211_tx_queue_params qparam;
1429 struct ieee80211_chanctx_conf *chanctx_conf;
1430 int ac;
1431 bool use_11b;
1432 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1433 int aCWmin, aCWmax;
1434
1435 if (!local->ops->conf_tx)
1436 return;
1437
1438 if (local->hw.queues < IEEE80211_NUM_ACS)
1439 return;
1440
1441 memset(&qparam, 0, sizeof(qparam));
1442
1443 rcu_read_lock();
1444 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1445 use_11b = (chanctx_conf &&
1446 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1447 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1448 rcu_read_unlock();
1449
1450 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1451
1452 /* Set defaults according to 802.11-2007 Table 7-37 */
1453 aCWmax = 1023;
1454 if (use_11b)
1455 aCWmin = 31;
1456 else
1457 aCWmin = 15;
1458
1459 /* Confiure old 802.11b/g medium access rules. */
1460 qparam.cw_max = aCWmax;
1461 qparam.cw_min = aCWmin;
1462 qparam.txop = 0;
1463 qparam.aifs = 2;
1464
1465 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1466 /* Update if QoS is enabled. */
1467 if (enable_qos) {
1468 switch (ac) {
1469 case IEEE80211_AC_BK:
1470 qparam.cw_max = aCWmax;
1471 qparam.cw_min = aCWmin;
1472 qparam.txop = 0;
1473 if (is_ocb)
1474 qparam.aifs = 9;
1475 else
1476 qparam.aifs = 7;
1477 break;
1478 /* never happens but let's not leave undefined */
1479 default:
1480 case IEEE80211_AC_BE:
1481 qparam.cw_max = aCWmax;
1482 qparam.cw_min = aCWmin;
1483 qparam.txop = 0;
1484 if (is_ocb)
1485 qparam.aifs = 6;
1486 else
1487 qparam.aifs = 3;
1488 break;
1489 case IEEE80211_AC_VI:
1490 qparam.cw_max = aCWmin;
1491 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1492 if (is_ocb)
1493 qparam.txop = 0;
1494 else if (use_11b)
1495 qparam.txop = 6016/32;
1496 else
1497 qparam.txop = 3008/32;
1498
1499 if (is_ocb)
1500 qparam.aifs = 3;
1501 else
1502 qparam.aifs = 2;
1503 break;
1504 case IEEE80211_AC_VO:
1505 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1506 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1507 if (is_ocb)
1508 qparam.txop = 0;
1509 else if (use_11b)
1510 qparam.txop = 3264/32;
1511 else
1512 qparam.txop = 1504/32;
1513 qparam.aifs = 2;
1514 break;
1515 }
1516 }
1517 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1518
1519 qparam.uapsd = false;
1520
1521 sdata->tx_conf[ac] = qparam;
1522 drv_conf_tx(local, sdata, ac, &qparam);
1523 }
1524
1525 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1526 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1527 sdata->vif.type != NL80211_IFTYPE_NAN) {
1528 sdata->vif.bss_conf.qos = enable_qos;
1529 if (bss_notify)
1530 ieee80211_bss_info_change_notify(sdata,
1531 BSS_CHANGED_QOS);
1532 }
1533 }
1534
1535 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1536 u16 transaction, u16 auth_alg, u16 status,
1537 const u8 *extra, size_t extra_len, const u8 *da,
1538 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1539 u32 tx_flags)
1540 {
1541 struct ieee80211_local *local = sdata->local;
1542 struct sk_buff *skb;
1543 struct ieee80211_mgmt *mgmt;
1544 int err;
1545
1546 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1547 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1548 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1549 if (!skb)
1550 return;
1551
1552 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1553
1554 mgmt = skb_put_zero(skb, 24 + 6);
1555 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1556 IEEE80211_STYPE_AUTH);
1557 memcpy(mgmt->da, da, ETH_ALEN);
1558 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1559 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1560 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1561 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1562 mgmt->u.auth.status_code = cpu_to_le16(status);
1563 if (extra)
1564 skb_put_data(skb, extra, extra_len);
1565
1566 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1567 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1568 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1569 WARN_ON(err);
1570 }
1571
1572 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1573 tx_flags;
1574 ieee80211_tx_skb(sdata, skb);
1575 }
1576
1577 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1578 const u8 *bssid, u16 stype, u16 reason,
1579 bool send_frame, u8 *frame_buf)
1580 {
1581 struct ieee80211_local *local = sdata->local;
1582 struct sk_buff *skb;
1583 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1584
1585 /* build frame */
1586 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1587 mgmt->duration = 0; /* initialize only */
1588 mgmt->seq_ctrl = 0; /* initialize only */
1589 memcpy(mgmt->da, bssid, ETH_ALEN);
1590 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1591 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1592 /* u.deauth.reason_code == u.disassoc.reason_code */
1593 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1594
1595 if (send_frame) {
1596 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1597 IEEE80211_DEAUTH_FRAME_LEN);
1598 if (!skb)
1599 return;
1600
1601 skb_reserve(skb, local->hw.extra_tx_headroom);
1602
1603 /* copy in frame */
1604 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1605
1606 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1607 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1608 IEEE80211_SKB_CB(skb)->flags |=
1609 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1610
1611 ieee80211_tx_skb(sdata, skb);
1612 }
1613 }
1614
1615 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1616 u8 *buffer, size_t buffer_len,
1617 const u8 *ie, size_t ie_len,
1618 enum nl80211_band band,
1619 u32 rate_mask,
1620 struct cfg80211_chan_def *chandef,
1621 size_t *offset, u32 flags)
1622 {
1623 struct ieee80211_supported_band *sband;
1624 const struct ieee80211_sta_he_cap *he_cap;
1625 u8 *pos = buffer, *end = buffer + buffer_len;
1626 size_t noffset;
1627 int supp_rates_len, i;
1628 u8 rates[32];
1629 int num_rates;
1630 int ext_rates_len;
1631 int shift;
1632 u32 rate_flags;
1633 bool have_80mhz = false;
1634
1635 *offset = 0;
1636
1637 sband = local->hw.wiphy->bands[band];
1638 if (WARN_ON_ONCE(!sband))
1639 return 0;
1640
1641 rate_flags = ieee80211_chandef_rate_flags(chandef);
1642 shift = ieee80211_chandef_get_shift(chandef);
1643
1644 num_rates = 0;
1645 for (i = 0; i < sband->n_bitrates; i++) {
1646 if ((BIT(i) & rate_mask) == 0)
1647 continue; /* skip rate */
1648 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1649 continue;
1650
1651 rates[num_rates++] =
1652 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1653 (1 << shift) * 5);
1654 }
1655
1656 supp_rates_len = min_t(int, num_rates, 8);
1657
1658 if (end - pos < 2 + supp_rates_len)
1659 goto out_err;
1660 *pos++ = WLAN_EID_SUPP_RATES;
1661 *pos++ = supp_rates_len;
1662 memcpy(pos, rates, supp_rates_len);
1663 pos += supp_rates_len;
1664
1665 /* insert "request information" if in custom IEs */
1666 if (ie && ie_len) {
1667 static const u8 before_extrates[] = {
1668 WLAN_EID_SSID,
1669 WLAN_EID_SUPP_RATES,
1670 WLAN_EID_REQUEST,
1671 };
1672 noffset = ieee80211_ie_split(ie, ie_len,
1673 before_extrates,
1674 ARRAY_SIZE(before_extrates),
1675 *offset);
1676 if (end - pos < noffset - *offset)
1677 goto out_err;
1678 memcpy(pos, ie + *offset, noffset - *offset);
1679 pos += noffset - *offset;
1680 *offset = noffset;
1681 }
1682
1683 ext_rates_len = num_rates - supp_rates_len;
1684 if (ext_rates_len > 0) {
1685 if (end - pos < 2 + ext_rates_len)
1686 goto out_err;
1687 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1688 *pos++ = ext_rates_len;
1689 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1690 pos += ext_rates_len;
1691 }
1692
1693 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1694 if (end - pos < 3)
1695 goto out_err;
1696 *pos++ = WLAN_EID_DS_PARAMS;
1697 *pos++ = 1;
1698 *pos++ = ieee80211_frequency_to_channel(
1699 chandef->chan->center_freq);
1700 }
1701
1702 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1703 goto done;
1704
1705 /* insert custom IEs that go before HT */
1706 if (ie && ie_len) {
1707 static const u8 before_ht[] = {
1708 /*
1709 * no need to list the ones split off already
1710 * (or generated here)
1711 */
1712 WLAN_EID_DS_PARAMS,
1713 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1714 };
1715 noffset = ieee80211_ie_split(ie, ie_len,
1716 before_ht, ARRAY_SIZE(before_ht),
1717 *offset);
1718 if (end - pos < noffset - *offset)
1719 goto out_err;
1720 memcpy(pos, ie + *offset, noffset - *offset);
1721 pos += noffset - *offset;
1722 *offset = noffset;
1723 }
1724
1725 if (sband->ht_cap.ht_supported) {
1726 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1727 goto out_err;
1728 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1729 sband->ht_cap.cap);
1730 }
1731
1732 /* insert custom IEs that go before VHT */
1733 if (ie && ie_len) {
1734 static const u8 before_vht[] = {
1735 /*
1736 * no need to list the ones split off already
1737 * (or generated here)
1738 */
1739 WLAN_EID_BSS_COEX_2040,
1740 WLAN_EID_EXT_CAPABILITY,
1741 WLAN_EID_SSID_LIST,
1742 WLAN_EID_CHANNEL_USAGE,
1743 WLAN_EID_INTERWORKING,
1744 WLAN_EID_MESH_ID,
1745 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1746 };
1747 noffset = ieee80211_ie_split(ie, ie_len,
1748 before_vht, ARRAY_SIZE(before_vht),
1749 *offset);
1750 if (end - pos < noffset - *offset)
1751 goto out_err;
1752 memcpy(pos, ie + *offset, noffset - *offset);
1753 pos += noffset - *offset;
1754 *offset = noffset;
1755 }
1756
1757 /* Check if any channel in this sband supports at least 80 MHz */
1758 for (i = 0; i < sband->n_channels; i++) {
1759 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1760 IEEE80211_CHAN_NO_80MHZ))
1761 continue;
1762
1763 have_80mhz = true;
1764 break;
1765 }
1766
1767 if (sband->vht_cap.vht_supported && have_80mhz) {
1768 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1769 goto out_err;
1770 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1771 sband->vht_cap.cap);
1772 }
1773
1774 /* insert custom IEs that go before HE */
1775 if (ie && ie_len) {
1776 static const u8 before_he[] = {
1777 /*
1778 * no need to list the ones split off before VHT
1779 * or generated here
1780 */
1781 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1782 WLAN_EID_AP_CSN,
1783 /* TODO: add 11ah/11aj/11ak elements */
1784 };
1785 noffset = ieee80211_ie_split(ie, ie_len,
1786 before_he, ARRAY_SIZE(before_he),
1787 *offset);
1788 if (end - pos < noffset - *offset)
1789 goto out_err;
1790 memcpy(pos, ie + *offset, noffset - *offset);
1791 pos += noffset - *offset;
1792 *offset = noffset;
1793 }
1794
1795 he_cap = ieee80211_get_he_sta_cap(sband);
1796 if (he_cap) {
1797 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1798 if (!pos)
1799 goto out_err;
1800 }
1801
1802 /*
1803 * If adding more here, adjust code in main.c
1804 * that calculates local->scan_ies_len.
1805 */
1806
1807 return pos - buffer;
1808 out_err:
1809 WARN_ONCE(1, "not enough space for preq IEs\n");
1810 done:
1811 return pos - buffer;
1812 }
1813
1814 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1815 size_t buffer_len,
1816 struct ieee80211_scan_ies *ie_desc,
1817 const u8 *ie, size_t ie_len,
1818 u8 bands_used, u32 *rate_masks,
1819 struct cfg80211_chan_def *chandef,
1820 u32 flags)
1821 {
1822 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1823 int i;
1824
1825 memset(ie_desc, 0, sizeof(*ie_desc));
1826
1827 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1828 if (bands_used & BIT(i)) {
1829 pos += ieee80211_build_preq_ies_band(local,
1830 buffer + pos,
1831 buffer_len - pos,
1832 ie, ie_len, i,
1833 rate_masks[i],
1834 chandef,
1835 &custom_ie_offset,
1836 flags);
1837 ie_desc->ies[i] = buffer + old_pos;
1838 ie_desc->len[i] = pos - old_pos;
1839 old_pos = pos;
1840 }
1841 }
1842
1843 /* add any remaining custom IEs */
1844 if (ie && ie_len) {
1845 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1846 "not enough space for preq custom IEs\n"))
1847 return pos;
1848 memcpy(buffer + pos, ie + custom_ie_offset,
1849 ie_len - custom_ie_offset);
1850 ie_desc->common_ies = buffer + pos;
1851 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1852 pos += ie_len - custom_ie_offset;
1853 }
1854
1855 return pos;
1856 };
1857
1858 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1859 const u8 *src, const u8 *dst,
1860 u32 ratemask,
1861 struct ieee80211_channel *chan,
1862 const u8 *ssid, size_t ssid_len,
1863 const u8 *ie, size_t ie_len,
1864 u32 flags)
1865 {
1866 struct ieee80211_local *local = sdata->local;
1867 struct cfg80211_chan_def chandef;
1868 struct sk_buff *skb;
1869 struct ieee80211_mgmt *mgmt;
1870 int ies_len;
1871 u32 rate_masks[NUM_NL80211_BANDS] = {};
1872 struct ieee80211_scan_ies dummy_ie_desc;
1873
1874 /*
1875 * Do not send DS Channel parameter for directed probe requests
1876 * in order to maximize the chance that we get a response. Some
1877 * badly-behaved APs don't respond when this parameter is included.
1878 */
1879 chandef.width = sdata->vif.bss_conf.chandef.width;
1880 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1881 chandef.chan = NULL;
1882 else
1883 chandef.chan = chan;
1884
1885 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1886 100 + ie_len);
1887 if (!skb)
1888 return NULL;
1889
1890 rate_masks[chan->band] = ratemask;
1891 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1892 skb_tailroom(skb), &dummy_ie_desc,
1893 ie, ie_len, BIT(chan->band),
1894 rate_masks, &chandef, flags);
1895 skb_put(skb, ies_len);
1896
1897 if (dst) {
1898 mgmt = (struct ieee80211_mgmt *) skb->data;
1899 memcpy(mgmt->da, dst, ETH_ALEN);
1900 memcpy(mgmt->bssid, dst, ETH_ALEN);
1901 }
1902
1903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1904
1905 return skb;
1906 }
1907
1908 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1909 struct ieee802_11_elems *elems,
1910 enum nl80211_band band, u32 *basic_rates)
1911 {
1912 struct ieee80211_supported_band *sband;
1913 size_t num_rates;
1914 u32 supp_rates, rate_flags;
1915 int i, j, shift;
1916
1917 sband = sdata->local->hw.wiphy->bands[band];
1918 if (WARN_ON(!sband))
1919 return 1;
1920
1921 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1922 shift = ieee80211_vif_get_shift(&sdata->vif);
1923
1924 num_rates = sband->n_bitrates;
1925 supp_rates = 0;
1926 for (i = 0; i < elems->supp_rates_len +
1927 elems->ext_supp_rates_len; i++) {
1928 u8 rate = 0;
1929 int own_rate;
1930 bool is_basic;
1931 if (i < elems->supp_rates_len)
1932 rate = elems->supp_rates[i];
1933 else if (elems->ext_supp_rates)
1934 rate = elems->ext_supp_rates
1935 [i - elems->supp_rates_len];
1936 own_rate = 5 * (rate & 0x7f);
1937 is_basic = !!(rate & 0x80);
1938
1939 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1940 continue;
1941
1942 for (j = 0; j < num_rates; j++) {
1943 int brate;
1944 if ((rate_flags & sband->bitrates[j].flags)
1945 != rate_flags)
1946 continue;
1947
1948 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1949 1 << shift);
1950
1951 if (brate == own_rate) {
1952 supp_rates |= BIT(j);
1953 if (basic_rates && is_basic)
1954 *basic_rates |= BIT(j);
1955 }
1956 }
1957 }
1958 return supp_rates;
1959 }
1960
1961 void ieee80211_stop_device(struct ieee80211_local *local)
1962 {
1963 ieee80211_led_radio(local, false);
1964 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1965
1966 cancel_work_sync(&local->reconfig_filter);
1967
1968 flush_workqueue(local->workqueue);
1969 drv_stop(local);
1970 }
1971
1972 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1973 bool aborted)
1974 {
1975 /* It's possible that we don't handle the scan completion in
1976 * time during suspend, so if it's still marked as completed
1977 * here, queue the work and flush it to clean things up.
1978 * Instead of calling the worker function directly here, we
1979 * really queue it to avoid potential races with other flows
1980 * scheduling the same work.
1981 */
1982 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1983 /* If coming from reconfiguration failure, abort the scan so
1984 * we don't attempt to continue a partial HW scan - which is
1985 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1986 * completed scan, and a 5 GHz portion is still pending.
1987 */
1988 if (aborted)
1989 set_bit(SCAN_ABORTED, &local->scanning);
1990 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1991 flush_delayed_work(&local->scan_work);
1992 }
1993 }
1994
1995 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1996 {
1997 struct ieee80211_sub_if_data *sdata;
1998 struct ieee80211_chanctx *ctx;
1999
2000 /*
2001 * We get here if during resume the device can't be restarted properly.
2002 * We might also get here if this happens during HW reset, which is a
2003 * slightly different situation and we need to drop all connections in
2004 * the latter case.
2005 *
2006 * Ask cfg80211 to turn off all interfaces, this will result in more
2007 * warnings but at least we'll then get into a clean stopped state.
2008 */
2009
2010 local->resuming = false;
2011 local->suspended = false;
2012 local->in_reconfig = false;
2013
2014 ieee80211_flush_completed_scan(local, true);
2015
2016 /* scheduled scan clearly can't be running any more, but tell
2017 * cfg80211 and clear local state
2018 */
2019 ieee80211_sched_scan_end(local);
2020
2021 list_for_each_entry(sdata, &local->interfaces, list)
2022 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2023
2024 /* Mark channel contexts as not being in the driver any more to avoid
2025 * removing them from the driver during the shutdown process...
2026 */
2027 mutex_lock(&local->chanctx_mtx);
2028 list_for_each_entry(ctx, &local->chanctx_list, list)
2029 ctx->driver_present = false;
2030 mutex_unlock(&local->chanctx_mtx);
2031
2032 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2033 }
2034
2035 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2036 struct ieee80211_sub_if_data *sdata)
2037 {
2038 struct ieee80211_chanctx_conf *conf;
2039 struct ieee80211_chanctx *ctx;
2040
2041 if (!local->use_chanctx)
2042 return;
2043
2044 mutex_lock(&local->chanctx_mtx);
2045 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2046 lockdep_is_held(&local->chanctx_mtx));
2047 if (conf) {
2048 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2049 drv_assign_vif_chanctx(local, sdata, ctx);
2050 }
2051 mutex_unlock(&local->chanctx_mtx);
2052 }
2053
2054 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2055 {
2056 struct ieee80211_local *local = sdata->local;
2057 struct sta_info *sta;
2058
2059 /* add STAs back */
2060 mutex_lock(&local->sta_mtx);
2061 list_for_each_entry(sta, &local->sta_list, list) {
2062 enum ieee80211_sta_state state;
2063
2064 if (!sta->uploaded || sta->sdata != sdata)
2065 continue;
2066
2067 for (state = IEEE80211_STA_NOTEXIST;
2068 state < sta->sta_state; state++)
2069 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2070 state + 1));
2071 }
2072 mutex_unlock(&local->sta_mtx);
2073 }
2074
2075 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2076 {
2077 struct cfg80211_nan_func *func, **funcs;
2078 int res, id, i = 0;
2079
2080 res = drv_start_nan(sdata->local, sdata,
2081 &sdata->u.nan.conf);
2082 if (WARN_ON(res))
2083 return res;
2084
2085 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2086 sizeof(*funcs),
2087 GFP_KERNEL);
2088 if (!funcs)
2089 return -ENOMEM;
2090
2091 /* Add all the functions:
2092 * This is a little bit ugly. We need to call a potentially sleeping
2093 * callback for each NAN function, so we can't hold the spinlock.
2094 */
2095 spin_lock_bh(&sdata->u.nan.func_lock);
2096
2097 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2098 funcs[i++] = func;
2099
2100 spin_unlock_bh(&sdata->u.nan.func_lock);
2101
2102 for (i = 0; funcs[i]; i++) {
2103 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2104 if (WARN_ON(res))
2105 ieee80211_nan_func_terminated(&sdata->vif,
2106 funcs[i]->instance_id,
2107 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2108 GFP_KERNEL);
2109 }
2110
2111 kfree(funcs);
2112
2113 return 0;
2114 }
2115
2116 int ieee80211_reconfig(struct ieee80211_local *local)
2117 {
2118 struct ieee80211_hw *hw = &local->hw;
2119 struct ieee80211_sub_if_data *sdata;
2120 struct ieee80211_chanctx *ctx;
2121 struct sta_info *sta;
2122 int res, i;
2123 bool reconfig_due_to_wowlan = false;
2124 struct ieee80211_sub_if_data *sched_scan_sdata;
2125 struct cfg80211_sched_scan_request *sched_scan_req;
2126 bool sched_scan_stopped = false;
2127 bool suspended = local->suspended;
2128
2129 /* nothing to do if HW shouldn't run */
2130 if (!local->open_count)
2131 goto wake_up;
2132
2133 #ifdef CONFIG_PM
2134 if (suspended)
2135 local->resuming = true;
2136
2137 if (local->wowlan) {
2138 /*
2139 * In the wowlan case, both mac80211 and the device
2140 * are functional when the resume op is called, so
2141 * clear local->suspended so the device could operate
2142 * normally (e.g. pass rx frames).
2143 */
2144 local->suspended = false;
2145 res = drv_resume(local);
2146 local->wowlan = false;
2147 if (res < 0) {
2148 local->resuming = false;
2149 return res;
2150 }
2151 if (res == 0)
2152 goto wake_up;
2153 WARN_ON(res > 1);
2154 /*
2155 * res is 1, which means the driver requested
2156 * to go through a regular reset on wakeup.
2157 * restore local->suspended in this case.
2158 */
2159 reconfig_due_to_wowlan = true;
2160 local->suspended = true;
2161 }
2162 #endif
2163
2164 /*
2165 * In case of hw_restart during suspend (without wowlan),
2166 * cancel restart work, as we are reconfiguring the device
2167 * anyway.
2168 * Note that restart_work is scheduled on a frozen workqueue,
2169 * so we can't deadlock in this case.
2170 */
2171 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2172 cancel_work_sync(&local->restart_work);
2173
2174 local->started = false;
2175
2176 /*
2177 * Upon resume hardware can sometimes be goofy due to
2178 * various platform / driver / bus issues, so restarting
2179 * the device may at times not work immediately. Propagate
2180 * the error.
2181 */
2182 res = drv_start(local);
2183 if (res) {
2184 if (suspended)
2185 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2186 else
2187 WARN(1, "Hardware became unavailable during restart.\n");
2188 ieee80211_handle_reconfig_failure(local);
2189 return res;
2190 }
2191
2192 /* setup fragmentation threshold */
2193 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2194
2195 /* setup RTS threshold */
2196 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2197
2198 /* reset coverage class */
2199 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2200
2201 ieee80211_led_radio(local, true);
2202 ieee80211_mod_tpt_led_trig(local,
2203 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2204
2205 /* add interfaces */
2206 sdata = rtnl_dereference(local->monitor_sdata);
2207 if (sdata) {
2208 /* in HW restart it exists already */
2209 WARN_ON(local->resuming);
2210 res = drv_add_interface(local, sdata);
2211 if (WARN_ON(res)) {
2212 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2213 synchronize_net();
2214 kfree(sdata);
2215 }
2216 }
2217
2218 list_for_each_entry(sdata, &local->interfaces, list) {
2219 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2220 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2221 ieee80211_sdata_running(sdata)) {
2222 res = drv_add_interface(local, sdata);
2223 if (WARN_ON(res))
2224 break;
2225 }
2226 }
2227
2228 /* If adding any of the interfaces failed above, roll back and
2229 * report failure.
2230 */
2231 if (res) {
2232 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2233 list)
2234 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2235 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2236 ieee80211_sdata_running(sdata))
2237 drv_remove_interface(local, sdata);
2238 ieee80211_handle_reconfig_failure(local);
2239 return res;
2240 }
2241
2242 /* add channel contexts */
2243 if (local->use_chanctx) {
2244 mutex_lock(&local->chanctx_mtx);
2245 list_for_each_entry(ctx, &local->chanctx_list, list)
2246 if (ctx->replace_state !=
2247 IEEE80211_CHANCTX_REPLACES_OTHER)
2248 WARN_ON(drv_add_chanctx(local, ctx));
2249 mutex_unlock(&local->chanctx_mtx);
2250
2251 sdata = rtnl_dereference(local->monitor_sdata);
2252 if (sdata && ieee80211_sdata_running(sdata))
2253 ieee80211_assign_chanctx(local, sdata);
2254 }
2255
2256 /* reconfigure hardware */
2257 ieee80211_hw_config(local, ~0);
2258
2259 ieee80211_configure_filter(local);
2260
2261 /* Finally also reconfigure all the BSS information */
2262 list_for_each_entry(sdata, &local->interfaces, list) {
2263 u32 changed;
2264
2265 if (!ieee80211_sdata_running(sdata))
2266 continue;
2267
2268 ieee80211_assign_chanctx(local, sdata);
2269
2270 switch (sdata->vif.type) {
2271 case NL80211_IFTYPE_AP_VLAN:
2272 case NL80211_IFTYPE_MONITOR:
2273 break;
2274 case NL80211_IFTYPE_ADHOC:
2275 if (sdata->vif.bss_conf.ibss_joined)
2276 WARN_ON(drv_join_ibss(local, sdata));
2277 /* fall through */
2278 default:
2279 ieee80211_reconfig_stations(sdata);
2280 /* fall through */
2281 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2282 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2283 drv_conf_tx(local, sdata, i,
2284 &sdata->tx_conf[i]);
2285 break;
2286 }
2287
2288 /* common change flags for all interface types */
2289 changed = BSS_CHANGED_ERP_CTS_PROT |
2290 BSS_CHANGED_ERP_PREAMBLE |
2291 BSS_CHANGED_ERP_SLOT |
2292 BSS_CHANGED_HT |
2293 BSS_CHANGED_BASIC_RATES |
2294 BSS_CHANGED_BEACON_INT |
2295 BSS_CHANGED_BSSID |
2296 BSS_CHANGED_CQM |
2297 BSS_CHANGED_QOS |
2298 BSS_CHANGED_IDLE |
2299 BSS_CHANGED_TXPOWER |
2300 BSS_CHANGED_MCAST_RATE;
2301
2302 if (sdata->vif.mu_mimo_owner)
2303 changed |= BSS_CHANGED_MU_GROUPS;
2304
2305 switch (sdata->vif.type) {
2306 case NL80211_IFTYPE_STATION:
2307 changed |= BSS_CHANGED_ASSOC |
2308 BSS_CHANGED_ARP_FILTER |
2309 BSS_CHANGED_PS;
2310
2311 /* Re-send beacon info report to the driver */
2312 if (sdata->u.mgd.have_beacon)
2313 changed |= BSS_CHANGED_BEACON_INFO;
2314
2315 if (sdata->vif.bss_conf.max_idle_period ||
2316 sdata->vif.bss_conf.protected_keep_alive)
2317 changed |= BSS_CHANGED_KEEP_ALIVE;
2318
2319 sdata_lock(sdata);
2320 ieee80211_bss_info_change_notify(sdata, changed);
2321 sdata_unlock(sdata);
2322 break;
2323 case NL80211_IFTYPE_OCB:
2324 changed |= BSS_CHANGED_OCB;
2325 ieee80211_bss_info_change_notify(sdata, changed);
2326 break;
2327 case NL80211_IFTYPE_ADHOC:
2328 changed |= BSS_CHANGED_IBSS;
2329 /* fall through */
2330 case NL80211_IFTYPE_AP:
2331 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2332
2333 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2334 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2335 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2336 changed |= BSS_CHANGED_FTM_RESPONDER;
2337
2338 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2339 changed |= BSS_CHANGED_AP_PROBE_RESP;
2340
2341 if (rcu_access_pointer(sdata->u.ap.beacon))
2342 drv_start_ap(local, sdata);
2343 }
2344
2345 /* fall through */
2346 case NL80211_IFTYPE_MESH_POINT:
2347 if (sdata->vif.bss_conf.enable_beacon) {
2348 changed |= BSS_CHANGED_BEACON |
2349 BSS_CHANGED_BEACON_ENABLED;
2350 ieee80211_bss_info_change_notify(sdata, changed);
2351 }
2352 break;
2353 case NL80211_IFTYPE_NAN:
2354 res = ieee80211_reconfig_nan(sdata);
2355 if (res < 0) {
2356 ieee80211_handle_reconfig_failure(local);
2357 return res;
2358 }
2359 break;
2360 case NL80211_IFTYPE_WDS:
2361 case NL80211_IFTYPE_AP_VLAN:
2362 case NL80211_IFTYPE_MONITOR:
2363 case NL80211_IFTYPE_P2P_DEVICE:
2364 /* nothing to do */
2365 break;
2366 case NL80211_IFTYPE_UNSPECIFIED:
2367 case NUM_NL80211_IFTYPES:
2368 case NL80211_IFTYPE_P2P_CLIENT:
2369 case NL80211_IFTYPE_P2P_GO:
2370 WARN_ON(1);
2371 break;
2372 }
2373 }
2374
2375 ieee80211_recalc_ps(local);
2376
2377 /*
2378 * The sta might be in psm against the ap (e.g. because
2379 * this was the state before a hw restart), so we
2380 * explicitly send a null packet in order to make sure
2381 * it'll sync against the ap (and get out of psm).
2382 */
2383 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2384 list_for_each_entry(sdata, &local->interfaces, list) {
2385 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2386 continue;
2387 if (!sdata->u.mgd.associated)
2388 continue;
2389
2390 ieee80211_send_nullfunc(local, sdata, false);
2391 }
2392 }
2393
2394 /* APs are now beaconing, add back stations */
2395 mutex_lock(&local->sta_mtx);
2396 list_for_each_entry(sta, &local->sta_list, list) {
2397 enum ieee80211_sta_state state;
2398
2399 if (!sta->uploaded)
2400 continue;
2401
2402 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2403 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2404 continue;
2405
2406 for (state = IEEE80211_STA_NOTEXIST;
2407 state < sta->sta_state; state++)
2408 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2409 state + 1));
2410 }
2411 mutex_unlock(&local->sta_mtx);
2412
2413 /* add back keys */
2414 list_for_each_entry(sdata, &local->interfaces, list)
2415 ieee80211_reset_crypto_tx_tailroom(sdata);
2416
2417 list_for_each_entry(sdata, &local->interfaces, list)
2418 if (ieee80211_sdata_running(sdata))
2419 ieee80211_enable_keys(sdata);
2420
2421 /* Reconfigure sched scan if it was interrupted by FW restart */
2422 mutex_lock(&local->mtx);
2423 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2424 lockdep_is_held(&local->mtx));
2425 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2426 lockdep_is_held(&local->mtx));
2427 if (sched_scan_sdata && sched_scan_req)
2428 /*
2429 * Sched scan stopped, but we don't want to report it. Instead,
2430 * we're trying to reschedule. However, if more than one scan
2431 * plan was set, we cannot reschedule since we don't know which
2432 * scan plan was currently running (and some scan plans may have
2433 * already finished).
2434 */
2435 if (sched_scan_req->n_scan_plans > 1 ||
2436 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2437 sched_scan_req)) {
2438 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2439 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2440 sched_scan_stopped = true;
2441 }
2442 mutex_unlock(&local->mtx);
2443
2444 if (sched_scan_stopped)
2445 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2446
2447 wake_up:
2448
2449 if (local->monitors == local->open_count && local->monitors > 0)
2450 ieee80211_add_virtual_monitor(local);
2451
2452 /*
2453 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2454 * sessions can be established after a resume.
2455 *
2456 * Also tear down aggregation sessions since reconfiguring
2457 * them in a hardware restart scenario is not easily done
2458 * right now, and the hardware will have lost information
2459 * about the sessions, but we and the AP still think they
2460 * are active. This is really a workaround though.
2461 */
2462 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2463 mutex_lock(&local->sta_mtx);
2464
2465 list_for_each_entry(sta, &local->sta_list, list) {
2466 if (!local->resuming)
2467 ieee80211_sta_tear_down_BA_sessions(
2468 sta, AGG_STOP_LOCAL_REQUEST);
2469 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2470 }
2471
2472 mutex_unlock(&local->sta_mtx);
2473 }
2474
2475 if (local->in_reconfig) {
2476 local->in_reconfig = false;
2477 barrier();
2478
2479 /* Restart deferred ROCs */
2480 mutex_lock(&local->mtx);
2481 ieee80211_start_next_roc(local);
2482 mutex_unlock(&local->mtx);
2483 }
2484
2485 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2486 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2487 false);
2488
2489 /*
2490 * If this is for hw restart things are still running.
2491 * We may want to change that later, however.
2492 */
2493 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2494 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2495
2496 if (!suspended)
2497 return 0;
2498
2499 #ifdef CONFIG_PM
2500 /* first set suspended false, then resuming */
2501 local->suspended = false;
2502 mb();
2503 local->resuming = false;
2504
2505 ieee80211_flush_completed_scan(local, false);
2506
2507 if (local->open_count && !reconfig_due_to_wowlan)
2508 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2509
2510 list_for_each_entry(sdata, &local->interfaces, list) {
2511 if (!ieee80211_sdata_running(sdata))
2512 continue;
2513 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2514 ieee80211_sta_restart(sdata);
2515 }
2516
2517 mod_timer(&local->sta_cleanup, jiffies + 1);
2518 #else
2519 WARN_ON(1);
2520 #endif
2521
2522 return 0;
2523 }
2524
2525 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2526 {
2527 struct ieee80211_sub_if_data *sdata;
2528 struct ieee80211_local *local;
2529 struct ieee80211_key *key;
2530
2531 if (WARN_ON(!vif))
2532 return;
2533
2534 sdata = vif_to_sdata(vif);
2535 local = sdata->local;
2536
2537 if (WARN_ON(!local->resuming))
2538 return;
2539
2540 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2541 return;
2542
2543 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2544
2545 mutex_lock(&local->key_mtx);
2546 list_for_each_entry(key, &sdata->key_list, list)
2547 key->flags |= KEY_FLAG_TAINTED;
2548 mutex_unlock(&local->key_mtx);
2549 }
2550 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2551
2552 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2553 {
2554 struct ieee80211_local *local = sdata->local;
2555 struct ieee80211_chanctx_conf *chanctx_conf;
2556 struct ieee80211_chanctx *chanctx;
2557
2558 mutex_lock(&local->chanctx_mtx);
2559
2560 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2561 lockdep_is_held(&local->chanctx_mtx));
2562
2563 /*
2564 * This function can be called from a work, thus it may be possible
2565 * that the chanctx_conf is removed (due to a disconnection, for
2566 * example).
2567 * So nothing should be done in such case.
2568 */
2569 if (!chanctx_conf)
2570 goto unlock;
2571
2572 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2573 ieee80211_recalc_smps_chanctx(local, chanctx);
2574 unlock:
2575 mutex_unlock(&local->chanctx_mtx);
2576 }
2577
2578 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2579 {
2580 struct ieee80211_local *local = sdata->local;
2581 struct ieee80211_chanctx_conf *chanctx_conf;
2582 struct ieee80211_chanctx *chanctx;
2583
2584 mutex_lock(&local->chanctx_mtx);
2585
2586 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2587 lockdep_is_held(&local->chanctx_mtx));
2588
2589 if (WARN_ON_ONCE(!chanctx_conf))
2590 goto unlock;
2591
2592 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2593 ieee80211_recalc_chanctx_min_def(local, chanctx);
2594 unlock:
2595 mutex_unlock(&local->chanctx_mtx);
2596 }
2597
2598 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2599 {
2600 size_t pos = offset;
2601
2602 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2603 pos += 2 + ies[pos + 1];
2604
2605 return pos;
2606 }
2607
2608 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2609 int rssi_min_thold,
2610 int rssi_max_thold)
2611 {
2612 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2613
2614 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2615 return;
2616
2617 /*
2618 * Scale up threshold values before storing it, as the RSSI averaging
2619 * algorithm uses a scaled up value as well. Change this scaling
2620 * factor if the RSSI averaging algorithm changes.
2621 */
2622 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2623 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2624 }
2625
2626 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2627 int rssi_min_thold,
2628 int rssi_max_thold)
2629 {
2630 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2631
2632 WARN_ON(rssi_min_thold == rssi_max_thold ||
2633 rssi_min_thold > rssi_max_thold);
2634
2635 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2636 rssi_max_thold);
2637 }
2638 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2639
2640 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2641 {
2642 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2643
2644 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2645 }
2646 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2647
2648 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2649 u16 cap)
2650 {
2651 __le16 tmp;
2652
2653 *pos++ = WLAN_EID_HT_CAPABILITY;
2654 *pos++ = sizeof(struct ieee80211_ht_cap);
2655 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2656
2657 /* capability flags */
2658 tmp = cpu_to_le16(cap);
2659 memcpy(pos, &tmp, sizeof(u16));
2660 pos += sizeof(u16);
2661
2662 /* AMPDU parameters */
2663 *pos++ = ht_cap->ampdu_factor |
2664 (ht_cap->ampdu_density <<
2665 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2666
2667 /* MCS set */
2668 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2669 pos += sizeof(ht_cap->mcs);
2670
2671 /* extended capabilities */
2672 pos += sizeof(__le16);
2673
2674 /* BF capabilities */
2675 pos += sizeof(__le32);
2676
2677 /* antenna selection */
2678 pos += sizeof(u8);
2679
2680 return pos;
2681 }
2682
2683 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2684 u32 cap)
2685 {
2686 __le32 tmp;
2687
2688 *pos++ = WLAN_EID_VHT_CAPABILITY;
2689 *pos++ = sizeof(struct ieee80211_vht_cap);
2690 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2691
2692 /* capability flags */
2693 tmp = cpu_to_le32(cap);
2694 memcpy(pos, &tmp, sizeof(u32));
2695 pos += sizeof(u32);
2696
2697 /* VHT MCS set */
2698 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2699 pos += sizeof(vht_cap->vht_mcs);
2700
2701 return pos;
2702 }
2703
2704 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2705 const struct ieee80211_sta_he_cap *he_cap,
2706 u8 *end)
2707 {
2708 u8 n;
2709 u8 ie_len;
2710 u8 *orig_pos = pos;
2711
2712 /* Make sure we have place for the IE */
2713 /*
2714 * TODO: the 1 added is because this temporarily is under the EXTENSION
2715 * IE. Get rid of it when it moves.
2716 */
2717 if (!he_cap)
2718 return orig_pos;
2719
2720 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2721 ie_len = 2 + 1 +
2722 sizeof(he_cap->he_cap_elem) + n +
2723 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2724 he_cap->he_cap_elem.phy_cap_info);
2725
2726 if ((end - pos) < ie_len)
2727 return orig_pos;
2728
2729 *pos++ = WLAN_EID_EXTENSION;
2730 pos++; /* We'll set the size later below */
2731 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2732
2733 /* Fixed data */
2734 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2735 pos += sizeof(he_cap->he_cap_elem);
2736
2737 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2738 pos += n;
2739
2740 /* Check if PPE Threshold should be present */
2741 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2742 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2743 goto end;
2744
2745 /*
2746 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2747 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2748 */
2749 n = hweight8(he_cap->ppe_thres[0] &
2750 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2751 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2752 IEEE80211_PPE_THRES_NSS_POS));
2753
2754 /*
2755 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2756 * total size.
2757 */
2758 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2759 n = DIV_ROUND_UP(n, 8);
2760
2761 /* Copy PPE Thresholds */
2762 memcpy(pos, &he_cap->ppe_thres, n);
2763 pos += n;
2764
2765 end:
2766 orig_pos[1] = (pos - orig_pos) - 2;
2767 return pos;
2768 }
2769
2770 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2771 const struct cfg80211_chan_def *chandef,
2772 u16 prot_mode, bool rifs_mode)
2773 {
2774 struct ieee80211_ht_operation *ht_oper;
2775 /* Build HT Information */
2776 *pos++ = WLAN_EID_HT_OPERATION;
2777 *pos++ = sizeof(struct ieee80211_ht_operation);
2778 ht_oper = (struct ieee80211_ht_operation *)pos;
2779 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2780 chandef->chan->center_freq);
2781 switch (chandef->width) {
2782 case NL80211_CHAN_WIDTH_160:
2783 case NL80211_CHAN_WIDTH_80P80:
2784 case NL80211_CHAN_WIDTH_80:
2785 case NL80211_CHAN_WIDTH_40:
2786 if (chandef->center_freq1 > chandef->chan->center_freq)
2787 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2788 else
2789 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2790 break;
2791 default:
2792 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2793 break;
2794 }
2795 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2796 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2797 chandef->width != NL80211_CHAN_WIDTH_20)
2798 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2799
2800 if (rifs_mode)
2801 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2802
2803 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2804 ht_oper->stbc_param = 0x0000;
2805
2806 /* It seems that Basic MCS set and Supported MCS set
2807 are identical for the first 10 bytes */
2808 memset(&ht_oper->basic_set, 0, 16);
2809 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2810
2811 return pos + sizeof(struct ieee80211_ht_operation);
2812 }
2813
2814 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2815 const struct cfg80211_chan_def *chandef)
2816 {
2817 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2818 *pos++ = 3; /* IE length */
2819 /* New channel width */
2820 switch (chandef->width) {
2821 case NL80211_CHAN_WIDTH_80:
2822 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2823 break;
2824 case NL80211_CHAN_WIDTH_160:
2825 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2826 break;
2827 case NL80211_CHAN_WIDTH_80P80:
2828 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2829 break;
2830 default:
2831 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2832 }
2833
2834 /* new center frequency segment 0 */
2835 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2836 /* new center frequency segment 1 */
2837 if (chandef->center_freq2)
2838 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2839 else
2840 *pos++ = 0;
2841 }
2842
2843 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2844 const struct cfg80211_chan_def *chandef)
2845 {
2846 struct ieee80211_vht_operation *vht_oper;
2847
2848 *pos++ = WLAN_EID_VHT_OPERATION;
2849 *pos++ = sizeof(struct ieee80211_vht_operation);
2850 vht_oper = (struct ieee80211_vht_operation *)pos;
2851 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2852 chandef->center_freq1);
2853 if (chandef->center_freq2)
2854 vht_oper->center_freq_seg1_idx =
2855 ieee80211_frequency_to_channel(chandef->center_freq2);
2856 else
2857 vht_oper->center_freq_seg1_idx = 0x00;
2858
2859 switch (chandef->width) {
2860 case NL80211_CHAN_WIDTH_160:
2861 /*
2862 * Convert 160 MHz channel width to new style as interop
2863 * workaround.
2864 */
2865 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2866 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2867 if (chandef->chan->center_freq < chandef->center_freq1)
2868 vht_oper->center_freq_seg0_idx -= 8;
2869 else
2870 vht_oper->center_freq_seg0_idx += 8;
2871 break;
2872 case NL80211_CHAN_WIDTH_80P80:
2873 /*
2874 * Convert 80+80 MHz channel width to new style as interop
2875 * workaround.
2876 */
2877 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2878 break;
2879 case NL80211_CHAN_WIDTH_80:
2880 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2881 break;
2882 default:
2883 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2884 break;
2885 }
2886
2887 /* don't require special VHT peer rates */
2888 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2889
2890 return pos + sizeof(struct ieee80211_vht_operation);
2891 }
2892
2893 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2894 struct cfg80211_chan_def *chandef)
2895 {
2896 enum nl80211_channel_type channel_type;
2897
2898 if (!ht_oper)
2899 return false;
2900
2901 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2902 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2903 channel_type = NL80211_CHAN_HT20;
2904 break;
2905 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2906 channel_type = NL80211_CHAN_HT40PLUS;
2907 break;
2908 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2909 channel_type = NL80211_CHAN_HT40MINUS;
2910 break;
2911 default:
2912 channel_type = NL80211_CHAN_NO_HT;
2913 return false;
2914 }
2915
2916 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2917 return true;
2918 }
2919
2920 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2921 const struct ieee80211_vht_operation *oper,
2922 const struct ieee80211_ht_operation *htop,
2923 struct cfg80211_chan_def *chandef)
2924 {
2925 struct cfg80211_chan_def new = *chandef;
2926 int cf0, cf1;
2927 int ccfs0, ccfs1, ccfs2;
2928 int ccf0, ccf1;
2929
2930 if (!oper || !htop)
2931 return false;
2932
2933 ccfs0 = oper->center_freq_seg0_idx;
2934 ccfs1 = oper->center_freq_seg1_idx;
2935 ccfs2 = (le16_to_cpu(htop->operation_mode) &
2936 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2937 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2938
2939 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2940 ccf0 = ccfs0;
2941 ccf1 = ccfs1;
2942 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2943 ccf1 = ccfs2;
2944
2945 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2946 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2947
2948 switch (oper->chan_width) {
2949 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2950 /* just use HT information directly */
2951 break;
2952 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2953 new.width = NL80211_CHAN_WIDTH_80;
2954 new.center_freq1 = cf0;
2955 /* If needed, adjust based on the newer interop workaround. */
2956 if (ccf1) {
2957 unsigned int diff;
2958
2959 diff = abs(ccf1 - ccf0);
2960 if (diff == 8) {
2961 new.width = NL80211_CHAN_WIDTH_160;
2962 new.center_freq1 = cf1;
2963 } else if (diff > 8) {
2964 new.width = NL80211_CHAN_WIDTH_80P80;
2965 new.center_freq2 = cf1;
2966 }
2967 }
2968 break;
2969 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2970 /* deprecated encoding */
2971 new.width = NL80211_CHAN_WIDTH_160;
2972 new.center_freq1 = cf0;
2973 break;
2974 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2975 /* deprecated encoding */
2976 new.width = NL80211_CHAN_WIDTH_80P80;
2977 new.center_freq1 = cf0;
2978 new.center_freq2 = cf1;
2979 break;
2980 default:
2981 return false;
2982 }
2983
2984 if (!cfg80211_chandef_valid(&new))
2985 return false;
2986
2987 *chandef = new;
2988 return true;
2989 }
2990
2991 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2992 const struct ieee80211_supported_band *sband,
2993 const u8 *srates, int srates_len, u32 *rates)
2994 {
2995 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2996 int shift = ieee80211_chandef_get_shift(chandef);
2997 struct ieee80211_rate *br;
2998 int brate, rate, i, j, count = 0;
2999
3000 *rates = 0;
3001
3002 for (i = 0; i < srates_len; i++) {
3003 rate = srates[i] & 0x7f;
3004
3005 for (j = 0; j < sband->n_bitrates; j++) {
3006 br = &sband->bitrates[j];
3007 if ((rate_flags & br->flags) != rate_flags)
3008 continue;
3009
3010 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3011 if (brate == rate) {
3012 *rates |= BIT(j);
3013 count++;
3014 break;
3015 }
3016 }
3017 }
3018 return count;
3019 }
3020
3021 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3022 struct sk_buff *skb, bool need_basic,
3023 enum nl80211_band band)
3024 {
3025 struct ieee80211_local *local = sdata->local;
3026 struct ieee80211_supported_band *sband;
3027 int rate, shift;
3028 u8 i, rates, *pos;
3029 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3030 u32 rate_flags;
3031
3032 shift = ieee80211_vif_get_shift(&sdata->vif);
3033 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3034 sband = local->hw.wiphy->bands[band];
3035 rates = 0;
3036 for (i = 0; i < sband->n_bitrates; i++) {
3037 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3038 continue;
3039 rates++;
3040 }
3041 if (rates > 8)
3042 rates = 8;
3043
3044 if (skb_tailroom(skb) < rates + 2)
3045 return -ENOMEM;
3046
3047 pos = skb_put(skb, rates + 2);
3048 *pos++ = WLAN_EID_SUPP_RATES;
3049 *pos++ = rates;
3050 for (i = 0; i < rates; i++) {
3051 u8 basic = 0;
3052 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3053 continue;
3054
3055 if (need_basic && basic_rates & BIT(i))
3056 basic = 0x80;
3057 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3058 5 * (1 << shift));
3059 *pos++ = basic | (u8) rate;
3060 }
3061
3062 return 0;
3063 }
3064
3065 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3066 struct sk_buff *skb, bool need_basic,
3067 enum nl80211_band band)
3068 {
3069 struct ieee80211_local *local = sdata->local;
3070 struct ieee80211_supported_band *sband;
3071 int rate, shift;
3072 u8 i, exrates, *pos;
3073 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3074 u32 rate_flags;
3075
3076 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3077 shift = ieee80211_vif_get_shift(&sdata->vif);
3078
3079 sband = local->hw.wiphy->bands[band];
3080 exrates = 0;
3081 for (i = 0; i < sband->n_bitrates; i++) {
3082 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3083 continue;
3084 exrates++;
3085 }
3086
3087 if (exrates > 8)
3088 exrates -= 8;
3089 else
3090 exrates = 0;
3091
3092 if (skb_tailroom(skb) < exrates + 2)
3093 return -ENOMEM;
3094
3095 if (exrates) {
3096 pos = skb_put(skb, exrates + 2);
3097 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3098 *pos++ = exrates;
3099 for (i = 8; i < sband->n_bitrates; i++) {
3100 u8 basic = 0;
3101 if ((rate_flags & sband->bitrates[i].flags)
3102 != rate_flags)
3103 continue;
3104 if (need_basic && basic_rates & BIT(i))
3105 basic = 0x80;
3106 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3107 5 * (1 << shift));
3108 *pos++ = basic | (u8) rate;
3109 }
3110 }
3111 return 0;
3112 }
3113
3114 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3115 {
3116 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3117 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3118
3119 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3120 /* non-managed type inferfaces */
3121 return 0;
3122 }
3123 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3124 }
3125 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3126
3127 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3128 {
3129 if (!mcs)
3130 return 1;
3131
3132 /* TODO: consider rx_highest */
3133
3134 if (mcs->rx_mask[3])
3135 return 4;
3136 if (mcs->rx_mask[2])
3137 return 3;
3138 if (mcs->rx_mask[1])
3139 return 2;
3140 return 1;
3141 }
3142
3143 /**
3144 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3145 * @local: mac80211 hw info struct
3146 * @status: RX status
3147 * @mpdu_len: total MPDU length (including FCS)
3148 * @mpdu_offset: offset into MPDU to calculate timestamp at
3149 *
3150 * This function calculates the RX timestamp at the given MPDU offset, taking
3151 * into account what the RX timestamp was. An offset of 0 will just normalize
3152 * the timestamp to TSF at beginning of MPDU reception.
3153 */
3154 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3155 struct ieee80211_rx_status *status,
3156 unsigned int mpdu_len,
3157 unsigned int mpdu_offset)
3158 {
3159 u64 ts = status->mactime;
3160 struct rate_info ri;
3161 u16 rate;
3162
3163 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3164 return 0;
3165
3166 memset(&ri, 0, sizeof(ri));
3167
3168 ri.bw = status->bw;
3169
3170 /* Fill cfg80211 rate info */
3171 switch (status->encoding) {
3172 case RX_ENC_HT:
3173 ri.mcs = status->rate_idx;
3174 ri.flags |= RATE_INFO_FLAGS_MCS;
3175 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3176 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3177 break;
3178 case RX_ENC_VHT:
3179 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3180 ri.mcs = status->rate_idx;
3181 ri.nss = status->nss;
3182 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3183 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3184 break;
3185 default:
3186 WARN_ON(1);
3187 /* fall through */
3188 case RX_ENC_LEGACY: {
3189 struct ieee80211_supported_band *sband;
3190 int shift = 0;
3191 int bitrate;
3192
3193 switch (status->bw) {
3194 case RATE_INFO_BW_10:
3195 shift = 1;
3196 break;
3197 case RATE_INFO_BW_5:
3198 shift = 2;
3199 break;
3200 }
3201
3202 sband = local->hw.wiphy->bands[status->band];
3203 bitrate = sband->bitrates[status->rate_idx].bitrate;
3204 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3205
3206 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3207 /* TODO: handle HT/VHT preambles */
3208 if (status->band == NL80211_BAND_5GHZ) {
3209 ts += 20 << shift;
3210 mpdu_offset += 2;
3211 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3212 ts += 96;
3213 } else {
3214 ts += 192;
3215 }
3216 }
3217 break;
3218 }
3219 }
3220
3221 rate = cfg80211_calculate_bitrate(&ri);
3222 if (WARN_ONCE(!rate,
3223 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3224 (unsigned long long)status->flag, status->rate_idx,
3225 status->nss))
3226 return 0;
3227
3228 /* rewind from end of MPDU */
3229 if (status->flag & RX_FLAG_MACTIME_END)
3230 ts -= mpdu_len * 8 * 10 / rate;
3231
3232 ts += mpdu_offset * 8 * 10 / rate;
3233
3234 return ts;
3235 }
3236
3237 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3238 {
3239 struct ieee80211_sub_if_data *sdata;
3240 struct cfg80211_chan_def chandef;
3241
3242 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3243 ASSERT_RTNL();
3244
3245 mutex_lock(&local->mtx);
3246 list_for_each_entry(sdata, &local->interfaces, list) {
3247 /* it might be waiting for the local->mtx, but then
3248 * by the time it gets it, sdata->wdev.cac_started
3249 * will no longer be true
3250 */
3251 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3252
3253 if (sdata->wdev.cac_started) {
3254 chandef = sdata->vif.bss_conf.chandef;
3255 ieee80211_vif_release_channel(sdata);
3256 cfg80211_cac_event(sdata->dev,
3257 &chandef,
3258 NL80211_RADAR_CAC_ABORTED,
3259 GFP_KERNEL);
3260 }
3261 }
3262 mutex_unlock(&local->mtx);
3263 }
3264
3265 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3266 {
3267 struct ieee80211_local *local =
3268 container_of(work, struct ieee80211_local, radar_detected_work);
3269 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3270 struct ieee80211_chanctx *ctx;
3271 int num_chanctx = 0;
3272
3273 mutex_lock(&local->chanctx_mtx);
3274 list_for_each_entry(ctx, &local->chanctx_list, list) {
3275 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3276 continue;
3277
3278 num_chanctx++;
3279 chandef = ctx->conf.def;
3280 }
3281 mutex_unlock(&local->chanctx_mtx);
3282
3283 rtnl_lock();
3284 ieee80211_dfs_cac_cancel(local);
3285 rtnl_unlock();
3286
3287 if (num_chanctx > 1)
3288 /* XXX: multi-channel is not supported yet */
3289 WARN_ON(1);
3290 else
3291 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3292 }
3293
3294 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3295 {
3296 struct ieee80211_local *local = hw_to_local(hw);
3297
3298 trace_api_radar_detected(local);
3299
3300 schedule_work(&local->radar_detected_work);
3301 }
3302 EXPORT_SYMBOL(ieee80211_radar_detected);
3303
3304 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3305 {
3306 u32 ret;
3307 int tmp;
3308
3309 switch (c->width) {
3310 case NL80211_CHAN_WIDTH_20:
3311 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3312 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3313 break;
3314 case NL80211_CHAN_WIDTH_40:
3315 c->width = NL80211_CHAN_WIDTH_20;
3316 c->center_freq1 = c->chan->center_freq;
3317 ret = IEEE80211_STA_DISABLE_40MHZ |
3318 IEEE80211_STA_DISABLE_VHT;
3319 break;
3320 case NL80211_CHAN_WIDTH_80:
3321 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3322 /* n_P40 */
3323 tmp /= 2;
3324 /* freq_P40 */
3325 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3326 c->width = NL80211_CHAN_WIDTH_40;
3327 ret = IEEE80211_STA_DISABLE_VHT;
3328 break;
3329 case NL80211_CHAN_WIDTH_80P80:
3330 c->center_freq2 = 0;
3331 c->width = NL80211_CHAN_WIDTH_80;
3332 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3333 IEEE80211_STA_DISABLE_160MHZ;
3334 break;
3335 case NL80211_CHAN_WIDTH_160:
3336 /* n_P20 */
3337 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3338 /* n_P80 */
3339 tmp /= 4;
3340 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3341 c->width = NL80211_CHAN_WIDTH_80;
3342 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3343 IEEE80211_STA_DISABLE_160MHZ;
3344 break;
3345 default:
3346 case NL80211_CHAN_WIDTH_20_NOHT:
3347 WARN_ON_ONCE(1);
3348 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3349 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3350 break;
3351 case NL80211_CHAN_WIDTH_5:
3352 case NL80211_CHAN_WIDTH_10:
3353 WARN_ON_ONCE(1);
3354 /* keep c->width */
3355 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3356 break;
3357 }
3358
3359 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3360
3361 return ret;
3362 }
3363
3364 /*
3365 * Returns true if smps_mode_new is strictly more restrictive than
3366 * smps_mode_old.
3367 */
3368 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3369 enum ieee80211_smps_mode smps_mode_new)
3370 {
3371 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3372 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3373 return false;
3374
3375 switch (smps_mode_old) {
3376 case IEEE80211_SMPS_STATIC:
3377 return false;
3378 case IEEE80211_SMPS_DYNAMIC:
3379 return smps_mode_new == IEEE80211_SMPS_STATIC;
3380 case IEEE80211_SMPS_OFF:
3381 return smps_mode_new != IEEE80211_SMPS_OFF;
3382 default:
3383 WARN_ON(1);
3384 }
3385
3386 return false;
3387 }
3388
3389 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3390 struct cfg80211_csa_settings *csa_settings)
3391 {
3392 struct sk_buff *skb;
3393 struct ieee80211_mgmt *mgmt;
3394 struct ieee80211_local *local = sdata->local;
3395 int freq;
3396 int hdr_len = offsetofend(struct ieee80211_mgmt,
3397 u.action.u.chan_switch);
3398 u8 *pos;
3399
3400 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3401 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3402 return -EOPNOTSUPP;
3403
3404 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3405 5 + /* channel switch announcement element */
3406 3 + /* secondary channel offset element */
3407 5 + /* wide bandwidth channel switch announcement */
3408 8); /* mesh channel switch parameters element */
3409 if (!skb)
3410 return -ENOMEM;
3411
3412 skb_reserve(skb, local->tx_headroom);
3413 mgmt = skb_put_zero(skb, hdr_len);
3414 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3415 IEEE80211_STYPE_ACTION);
3416
3417 eth_broadcast_addr(mgmt->da);
3418 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3419 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3420 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3421 } else {
3422 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3423 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3424 }
3425 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3426 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3427 pos = skb_put(skb, 5);
3428 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3429 *pos++ = 3; /* IE length */
3430 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3431 freq = csa_settings->chandef.chan->center_freq;
3432 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3433 *pos++ = csa_settings->count; /* count */
3434
3435 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3436 enum nl80211_channel_type ch_type;
3437
3438 skb_put(skb, 3);
3439 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3440 *pos++ = 1; /* IE length */
3441 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3442 if (ch_type == NL80211_CHAN_HT40PLUS)
3443 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3444 else
3445 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3446 }
3447
3448 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3449 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3450
3451 skb_put(skb, 8);
3452 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3453 *pos++ = 6; /* IE length */
3454 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3455 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3456 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3457 *pos++ |= csa_settings->block_tx ?
3458 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3459 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3460 pos += 2;
3461 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3462 pos += 2;
3463 }
3464
3465 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3466 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3467 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3468 skb_put(skb, 5);
3469 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3470 }
3471
3472 ieee80211_tx_skb(sdata, skb);
3473 return 0;
3474 }
3475
3476 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3477 {
3478 return !(cs == NULL || cs->cipher == 0 ||
3479 cs->hdr_len < cs->pn_len + cs->pn_off ||
3480 cs->hdr_len <= cs->key_idx_off ||
3481 cs->key_idx_shift > 7 ||
3482 cs->key_idx_mask == 0);
3483 }
3484
3485 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3486 {
3487 int i;
3488
3489 /* Ensure we have enough iftype bitmap space for all iftype values */
3490 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3491
3492 for (i = 0; i < n; i++)
3493 if (!ieee80211_cs_valid(&cs[i]))
3494 return false;
3495
3496 return true;
3497 }
3498
3499 const struct ieee80211_cipher_scheme *
3500 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3501 enum nl80211_iftype iftype)
3502 {
3503 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3504 int n = local->hw.n_cipher_schemes;
3505 int i;
3506 const struct ieee80211_cipher_scheme *cs = NULL;
3507
3508 for (i = 0; i < n; i++) {
3509 if (l[i].cipher == cipher) {
3510 cs = &l[i];
3511 break;
3512 }
3513 }
3514
3515 if (!cs || !(cs->iftype & BIT(iftype)))
3516 return NULL;
3517
3518 return cs;
3519 }
3520
3521 int ieee80211_cs_headroom(struct ieee80211_local *local,
3522 struct cfg80211_crypto_settings *crypto,
3523 enum nl80211_iftype iftype)
3524 {
3525 const struct ieee80211_cipher_scheme *cs;
3526 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3527 int i;
3528
3529 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3530 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3531 iftype);
3532
3533 if (cs && headroom < cs->hdr_len)
3534 headroom = cs->hdr_len;
3535 }
3536
3537 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3538 if (cs && headroom < cs->hdr_len)
3539 headroom = cs->hdr_len;
3540
3541 return headroom;
3542 }
3543
3544 static bool
3545 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3546 {
3547 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3548 int skip;
3549
3550 if (end > 0)
3551 return false;
3552
3553 /* One shot NOA */
3554 if (data->count[i] == 1)
3555 return false;
3556
3557 if (data->desc[i].interval == 0)
3558 return false;
3559
3560 /* End time is in the past, check for repetitions */
3561 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3562 if (data->count[i] < 255) {
3563 if (data->count[i] <= skip) {
3564 data->count[i] = 0;
3565 return false;
3566 }
3567
3568 data->count[i] -= skip;
3569 }
3570
3571 data->desc[i].start += skip * data->desc[i].interval;
3572
3573 return true;
3574 }
3575
3576 static bool
3577 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3578 s32 *offset)
3579 {
3580 bool ret = false;
3581 int i;
3582
3583 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3584 s32 cur;
3585
3586 if (!data->count[i])
3587 continue;
3588
3589 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3590 ret = true;
3591
3592 cur = data->desc[i].start - tsf;
3593 if (cur > *offset)
3594 continue;
3595
3596 cur = data->desc[i].start + data->desc[i].duration - tsf;
3597 if (cur > *offset)
3598 *offset = cur;
3599 }
3600
3601 return ret;
3602 }
3603
3604 static u32
3605 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3606 {
3607 s32 offset = 0;
3608 int tries = 0;
3609 /*
3610 * arbitrary limit, used to avoid infinite loops when combined NoA
3611 * descriptors cover the full time period.
3612 */
3613 int max_tries = 5;
3614
3615 ieee80211_extend_absent_time(data, tsf, &offset);
3616 do {
3617 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3618 break;
3619
3620 tries++;
3621 } while (tries < max_tries);
3622
3623 return offset;
3624 }
3625
3626 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3627 {
3628 u32 next_offset = BIT(31) - 1;
3629 int i;
3630
3631 data->absent = 0;
3632 data->has_next_tsf = false;
3633 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3634 s32 start;
3635
3636 if (!data->count[i])
3637 continue;
3638
3639 ieee80211_extend_noa_desc(data, tsf, i);
3640 start = data->desc[i].start - tsf;
3641 if (start <= 0)
3642 data->absent |= BIT(i);
3643
3644 if (next_offset > start)
3645 next_offset = start;
3646
3647 data->has_next_tsf = true;
3648 }
3649
3650 if (data->absent)
3651 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3652
3653 data->next_tsf = tsf + next_offset;
3654 }
3655 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3656
3657 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3658 struct ieee80211_noa_data *data, u32 tsf)
3659 {
3660 int ret = 0;
3661 int i;
3662
3663 memset(data, 0, sizeof(*data));
3664
3665 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3666 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3667
3668 if (!desc->count || !desc->duration)
3669 continue;
3670
3671 data->count[i] = desc->count;
3672 data->desc[i].start = le32_to_cpu(desc->start_time);
3673 data->desc[i].duration = le32_to_cpu(desc->duration);
3674 data->desc[i].interval = le32_to_cpu(desc->interval);
3675
3676 if (data->count[i] > 1 &&
3677 data->desc[i].interval < data->desc[i].duration)
3678 continue;
3679
3680 ieee80211_extend_noa_desc(data, tsf, i);
3681 ret++;
3682 }
3683
3684 if (ret)
3685 ieee80211_update_p2p_noa(data, tsf);
3686
3687 return ret;
3688 }
3689 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3690
3691 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3692 struct ieee80211_sub_if_data *sdata)
3693 {
3694 u64 tsf = drv_get_tsf(local, sdata);
3695 u64 dtim_count = 0;
3696 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3697 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3698 struct ps_data *ps;
3699 u8 bcns_from_dtim;
3700
3701 if (tsf == -1ULL || !beacon_int || !dtim_period)
3702 return;
3703
3704 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3705 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3706 if (!sdata->bss)
3707 return;
3708
3709 ps = &sdata->bss->ps;
3710 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3711 ps = &sdata->u.mesh.ps;
3712 } else {
3713 return;
3714 }
3715
3716 /*
3717 * actually finds last dtim_count, mac80211 will update in
3718 * __beacon_add_tim().
3719 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3720 */
3721 do_div(tsf, beacon_int);
3722 bcns_from_dtim = do_div(tsf, dtim_period);
3723 /* just had a DTIM */
3724 if (!bcns_from_dtim)
3725 dtim_count = 0;
3726 else
3727 dtim_count = dtim_period - bcns_from_dtim;
3728
3729 ps->dtim_count = dtim_count;
3730 }
3731
3732 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3733 struct ieee80211_chanctx *ctx)
3734 {
3735 struct ieee80211_sub_if_data *sdata;
3736 u8 radar_detect = 0;
3737
3738 lockdep_assert_held(&local->chanctx_mtx);
3739
3740 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3741 return 0;
3742
3743 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3744 if (sdata->reserved_radar_required)
3745 radar_detect |= BIT(sdata->reserved_chandef.width);
3746
3747 /*
3748 * An in-place reservation context should not have any assigned vifs
3749 * until it replaces the other context.
3750 */
3751 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3752 !list_empty(&ctx->assigned_vifs));
3753
3754 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3755 if (sdata->radar_required)
3756 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3757
3758 return radar_detect;
3759 }
3760
3761 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3762 const struct cfg80211_chan_def *chandef,
3763 enum ieee80211_chanctx_mode chanmode,
3764 u8 radar_detect)
3765 {
3766 struct ieee80211_local *local = sdata->local;
3767 struct ieee80211_sub_if_data *sdata_iter;
3768 enum nl80211_iftype iftype = sdata->wdev.iftype;
3769 struct ieee80211_chanctx *ctx;
3770 int total = 1;
3771 struct iface_combination_params params = {
3772 .radar_detect = radar_detect,
3773 };
3774
3775 lockdep_assert_held(&local->chanctx_mtx);
3776
3777 if (WARN_ON(hweight32(radar_detect) > 1))
3778 return -EINVAL;
3779
3780 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3781 !chandef->chan))
3782 return -EINVAL;
3783
3784 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3785 return -EINVAL;
3786
3787 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3788 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3789 /*
3790 * always passing this is harmless, since it'll be the
3791 * same value that cfg80211 finds if it finds the same
3792 * interface ... and that's always allowed
3793 */
3794 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3795 }
3796
3797 /* Always allow software iftypes */
3798 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3799 if (radar_detect)
3800 return -EINVAL;
3801 return 0;
3802 }
3803
3804 if (chandef)
3805 params.num_different_channels = 1;
3806
3807 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3808 params.iftype_num[iftype] = 1;
3809
3810 list_for_each_entry(ctx, &local->chanctx_list, list) {
3811 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3812 continue;
3813 params.radar_detect |=
3814 ieee80211_chanctx_radar_detect(local, ctx);
3815 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3816 params.num_different_channels++;
3817 continue;
3818 }
3819 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3820 cfg80211_chandef_compatible(chandef,
3821 &ctx->conf.def))
3822 continue;
3823 params.num_different_channels++;
3824 }
3825
3826 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3827 struct wireless_dev *wdev_iter;
3828
3829 wdev_iter = &sdata_iter->wdev;
3830
3831 if (sdata_iter == sdata ||
3832 !ieee80211_sdata_running(sdata_iter) ||
3833 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3834 continue;
3835
3836 params.iftype_num[wdev_iter->iftype]++;
3837 total++;
3838 }
3839
3840 if (total == 1 && !params.radar_detect)
3841 return 0;
3842
3843 return cfg80211_check_combinations(local->hw.wiphy, &params);
3844 }
3845
3846 static void
3847 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3848 void *data)
3849 {
3850 u32 *max_num_different_channels = data;
3851
3852 *max_num_different_channels = max(*max_num_different_channels,
3853 c->num_different_channels);
3854 }
3855
3856 int ieee80211_max_num_channels(struct ieee80211_local *local)
3857 {
3858 struct ieee80211_sub_if_data *sdata;
3859 struct ieee80211_chanctx *ctx;
3860 u32 max_num_different_channels = 1;
3861 int err;
3862 struct iface_combination_params params = {0};
3863
3864 lockdep_assert_held(&local->chanctx_mtx);
3865
3866 list_for_each_entry(ctx, &local->chanctx_list, list) {
3867 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3868 continue;
3869
3870 params.num_different_channels++;
3871
3872 params.radar_detect |=
3873 ieee80211_chanctx_radar_detect(local, ctx);
3874 }
3875
3876 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3877 params.iftype_num[sdata->wdev.iftype]++;
3878
3879 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3880 ieee80211_iter_max_chans,
3881 &max_num_different_channels);
3882 if (err < 0)
3883 return err;
3884
3885 return max_num_different_channels;
3886 }
3887
3888 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3889 {
3890 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3891 *buf++ = 7; /* len */
3892 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3893 *buf++ = 0x50;
3894 *buf++ = 0xf2;
3895 *buf++ = 2; /* WME */
3896 *buf++ = 0; /* WME info */
3897 *buf++ = 1; /* WME ver */
3898 *buf++ = qosinfo; /* U-APSD no in use */
3899
3900 return buf;
3901 }
3902
3903 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3904 unsigned long *frame_cnt,
3905 unsigned long *byte_cnt)
3906 {
3907 struct txq_info *txqi = to_txq_info(txq);
3908 u32 frag_cnt = 0, frag_bytes = 0;
3909 struct sk_buff *skb;
3910
3911 skb_queue_walk(&txqi->frags, skb) {
3912 frag_cnt++;
3913 frag_bytes += skb->len;
3914 }
3915
3916 if (frame_cnt)
3917 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3918
3919 if (byte_cnt)
3920 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3921 }
3922 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3923
3924 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3925 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3926 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3927 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3928 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3929 };
Linux with added FPC-III support