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Merge remote-tracking branch 'battery/for-next'
[deliverable/linux.git] / net / mac80211 / util.c
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015-2016 Intel Deutschland GmbH
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * utilities for mac80211
14 */
15
16 #include <net/mac80211.h>
17 #include <linux/netdevice.h>
18 #include <linux/export.h>
19 #include <linux/types.h>
20 #include <linux/slab.h>
21 #include <linux/skbuff.h>
22 #include <linux/etherdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/bitmap.h>
25 #include <linux/crc32.h>
26 #include <net/net_namespace.h>
27 #include <net/cfg80211.h>
28 #include <net/rtnetlink.h>
29
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
32 #include "rate.h"
33 #include "mesh.h"
34 #include "wme.h"
35 #include "led.h"
36 #include "wep.h"
37
38 /* privid for wiphys to determine whether they belong to us or not */
39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
40
41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
42 {
43 struct ieee80211_local *local;
44 BUG_ON(!wiphy);
45
46 local = wiphy_priv(wiphy);
47 return &local->hw;
48 }
49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
50
51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
52 {
53 struct sk_buff *skb;
54 struct ieee80211_hdr *hdr;
55
56 skb_queue_walk(&tx->skbs, skb) {
57 hdr = (struct ieee80211_hdr *) skb->data;
58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
59 }
60 }
61
62 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
63 int rate, int erp, int short_preamble,
64 int shift)
65 {
66 int dur;
67
68 /* calculate duration (in microseconds, rounded up to next higher
69 * integer if it includes a fractional microsecond) to send frame of
70 * len bytes (does not include FCS) at the given rate. Duration will
71 * also include SIFS.
72 *
73 * rate is in 100 kbps, so divident is multiplied by 10 in the
74 * DIV_ROUND_UP() operations.
75 *
76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
77 * is assumed to be 0 otherwise.
78 */
79
80 if (band == NL80211_BAND_5GHZ || erp) {
81 /*
82 * OFDM:
83 *
84 * N_DBPS = DATARATE x 4
85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
86 * (16 = SIGNAL time, 6 = tail bits)
87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
88 *
89 * T_SYM = 4 usec
90 * 802.11a - 18.5.2: aSIFSTime = 16 usec
91 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
92 * signal ext = 6 usec
93 */
94 dur = 16; /* SIFS + signal ext */
95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
97
98 /* IEEE 802.11-2012 18.3.2.4: all values above are:
99 * * times 4 for 5 MHz
100 * * times 2 for 10 MHz
101 */
102 dur *= 1 << shift;
103
104 /* rates should already consider the channel bandwidth,
105 * don't apply divisor again.
106 */
107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
108 4 * rate); /* T_SYM x N_SYM */
109 } else {
110 /*
111 * 802.11b or 802.11g with 802.11b compatibility:
112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
114 *
115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
116 * aSIFSTime = 10 usec
117 * aPreambleLength = 144 usec or 72 usec with short preamble
118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
119 */
120 dur = 10; /* aSIFSTime = 10 usec */
121 dur += short_preamble ? (72 + 24) : (144 + 48);
122
123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
124 }
125
126 return dur;
127 }
128
129 /* Exported duration function for driver use */
130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
131 struct ieee80211_vif *vif,
132 enum nl80211_band band,
133 size_t frame_len,
134 struct ieee80211_rate *rate)
135 {
136 struct ieee80211_sub_if_data *sdata;
137 u16 dur;
138 int erp, shift = 0;
139 bool short_preamble = false;
140
141 erp = 0;
142 if (vif) {
143 sdata = vif_to_sdata(vif);
144 short_preamble = sdata->vif.bss_conf.use_short_preamble;
145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
146 erp = rate->flags & IEEE80211_RATE_ERP_G;
147 shift = ieee80211_vif_get_shift(vif);
148 }
149
150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
151 short_preamble, shift);
152
153 return cpu_to_le16(dur);
154 }
155 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
156
157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
158 struct ieee80211_vif *vif, size_t frame_len,
159 const struct ieee80211_tx_info *frame_txctl)
160 {
161 struct ieee80211_local *local = hw_to_local(hw);
162 struct ieee80211_rate *rate;
163 struct ieee80211_sub_if_data *sdata;
164 bool short_preamble;
165 int erp, shift = 0, bitrate;
166 u16 dur;
167 struct ieee80211_supported_band *sband;
168
169 sband = local->hw.wiphy->bands[frame_txctl->band];
170
171 short_preamble = false;
172
173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
174
175 erp = 0;
176 if (vif) {
177 sdata = vif_to_sdata(vif);
178 short_preamble = sdata->vif.bss_conf.use_short_preamble;
179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
180 erp = rate->flags & IEEE80211_RATE_ERP_G;
181 shift = ieee80211_vif_get_shift(vif);
182 }
183
184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
185
186 /* CTS duration */
187 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
188 erp, short_preamble, shift);
189 /* Data frame duration */
190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
191 erp, short_preamble, shift);
192 /* ACK duration */
193 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
194 erp, short_preamble, shift);
195
196 return cpu_to_le16(dur);
197 }
198 EXPORT_SYMBOL(ieee80211_rts_duration);
199
200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
201 struct ieee80211_vif *vif,
202 size_t frame_len,
203 const struct ieee80211_tx_info *frame_txctl)
204 {
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
208 bool short_preamble;
209 int erp, shift = 0, bitrate;
210 u16 dur;
211 struct ieee80211_supported_band *sband;
212
213 sband = local->hw.wiphy->bands[frame_txctl->band];
214
215 short_preamble = false;
216
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
218 erp = 0;
219 if (vif) {
220 sdata = vif_to_sdata(vif);
221 short_preamble = sdata->vif.bss_conf.use_short_preamble;
222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
223 erp = rate->flags & IEEE80211_RATE_ERP_G;
224 shift = ieee80211_vif_get_shift(vif);
225 }
226
227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
228
229 /* Data frame duration */
230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
231 erp, short_preamble, shift);
232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
233 /* ACK duration */
234 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 }
237
238 return cpu_to_le16(dur);
239 }
240 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
241
242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
243 {
244 struct ieee80211_sub_if_data *sdata;
245 int n_acs = IEEE80211_NUM_ACS;
246
247 if (local->ops->wake_tx_queue)
248 return;
249
250 if (local->hw.queues < IEEE80211_NUM_ACS)
251 n_acs = 1;
252
253 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
254 int ac;
255
256 if (!sdata->dev)
257 continue;
258
259 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
260 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
261 continue;
262
263 for (ac = 0; ac < n_acs; ac++) {
264 int ac_queue = sdata->vif.hw_queue[ac];
265
266 if (ac_queue == queue ||
267 (sdata->vif.cab_queue == queue &&
268 local->queue_stop_reasons[ac_queue] == 0 &&
269 skb_queue_empty(&local->pending[ac_queue])))
270 netif_wake_subqueue(sdata->dev, ac);
271 }
272 }
273 }
274
275 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
276 enum queue_stop_reason reason,
277 bool refcounted)
278 {
279 struct ieee80211_local *local = hw_to_local(hw);
280
281 trace_wake_queue(local, queue, reason);
282
283 if (WARN_ON(queue >= hw->queues))
284 return;
285
286 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
287 return;
288
289 if (!refcounted) {
290 local->q_stop_reasons[queue][reason] = 0;
291 } else {
292 local->q_stop_reasons[queue][reason]--;
293 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
294 local->q_stop_reasons[queue][reason] = 0;
295 }
296
297 if (local->q_stop_reasons[queue][reason] == 0)
298 __clear_bit(reason, &local->queue_stop_reasons[queue]);
299
300 if (local->queue_stop_reasons[queue] != 0)
301 /* someone still has this queue stopped */
302 return;
303
304 if (skb_queue_empty(&local->pending[queue])) {
305 rcu_read_lock();
306 ieee80211_propagate_queue_wake(local, queue);
307 rcu_read_unlock();
308 } else
309 tasklet_schedule(&local->tx_pending_tasklet);
310 }
311
312 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
313 enum queue_stop_reason reason,
314 bool refcounted)
315 {
316 struct ieee80211_local *local = hw_to_local(hw);
317 unsigned long flags;
318
319 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
320 __ieee80211_wake_queue(hw, queue, reason, refcounted);
321 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
322 }
323
324 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
325 {
326 ieee80211_wake_queue_by_reason(hw, queue,
327 IEEE80211_QUEUE_STOP_REASON_DRIVER,
328 false);
329 }
330 EXPORT_SYMBOL(ieee80211_wake_queue);
331
332 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
333 enum queue_stop_reason reason,
334 bool refcounted)
335 {
336 struct ieee80211_local *local = hw_to_local(hw);
337 struct ieee80211_sub_if_data *sdata;
338 int n_acs = IEEE80211_NUM_ACS;
339
340 trace_stop_queue(local, queue, reason);
341
342 if (WARN_ON(queue >= hw->queues))
343 return;
344
345 if (!refcounted)
346 local->q_stop_reasons[queue][reason] = 1;
347 else
348 local->q_stop_reasons[queue][reason]++;
349
350 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
351 return;
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 rcu_read_lock();
360 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
361 int ac;
362
363 if (!sdata->dev)
364 continue;
365
366 for (ac = 0; ac < n_acs; ac++) {
367 if (sdata->vif.hw_queue[ac] == queue ||
368 sdata->vif.cab_queue == queue)
369 netif_stop_subqueue(sdata->dev, ac);
370 }
371 }
372 rcu_read_unlock();
373 }
374
375 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
376 enum queue_stop_reason reason,
377 bool refcounted)
378 {
379 struct ieee80211_local *local = hw_to_local(hw);
380 unsigned long flags;
381
382 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
383 __ieee80211_stop_queue(hw, queue, reason, refcounted);
384 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
385 }
386
387 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
388 {
389 ieee80211_stop_queue_by_reason(hw, queue,
390 IEEE80211_QUEUE_STOP_REASON_DRIVER,
391 false);
392 }
393 EXPORT_SYMBOL(ieee80211_stop_queue);
394
395 void ieee80211_add_pending_skb(struct ieee80211_local *local,
396 struct sk_buff *skb)
397 {
398 struct ieee80211_hw *hw = &local->hw;
399 unsigned long flags;
400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
401 int queue = info->hw_queue;
402
403 if (WARN_ON(!info->control.vif)) {
404 ieee80211_free_txskb(&local->hw, skb);
405 return;
406 }
407
408 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
409 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
410 false);
411 __skb_queue_tail(&local->pending[queue], skb);
412 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
413 false);
414 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
415 }
416
417 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
418 struct sk_buff_head *skbs)
419 {
420 struct ieee80211_hw *hw = &local->hw;
421 struct sk_buff *skb;
422 unsigned long flags;
423 int queue, i;
424
425 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
426 while ((skb = skb_dequeue(skbs))) {
427 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
428
429 if (WARN_ON(!info->control.vif)) {
430 ieee80211_free_txskb(&local->hw, skb);
431 continue;
432 }
433
434 queue = info->hw_queue;
435
436 __ieee80211_stop_queue(hw, queue,
437 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
438 false);
439
440 __skb_queue_tail(&local->pending[queue], skb);
441 }
442
443 for (i = 0; i < hw->queues; i++)
444 __ieee80211_wake_queue(hw, i,
445 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
446 false);
447 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
448 }
449
450 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
451 unsigned long queues,
452 enum queue_stop_reason reason,
453 bool refcounted)
454 {
455 struct ieee80211_local *local = hw_to_local(hw);
456 unsigned long flags;
457 int i;
458
459 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
460
461 for_each_set_bit(i, &queues, hw->queues)
462 __ieee80211_stop_queue(hw, i, reason, refcounted);
463
464 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
465 }
466
467 void ieee80211_stop_queues(struct ieee80211_hw *hw)
468 {
469 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
470 IEEE80211_QUEUE_STOP_REASON_DRIVER,
471 false);
472 }
473 EXPORT_SYMBOL(ieee80211_stop_queues);
474
475 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
476 {
477 struct ieee80211_local *local = hw_to_local(hw);
478 unsigned long flags;
479 int ret;
480
481 if (WARN_ON(queue >= hw->queues))
482 return true;
483
484 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
485 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
486 &local->queue_stop_reasons[queue]);
487 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
488 return ret;
489 }
490 EXPORT_SYMBOL(ieee80211_queue_stopped);
491
492 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
493 unsigned long queues,
494 enum queue_stop_reason reason,
495 bool refcounted)
496 {
497 struct ieee80211_local *local = hw_to_local(hw);
498 unsigned long flags;
499 int i;
500
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502
503 for_each_set_bit(i, &queues, hw->queues)
504 __ieee80211_wake_queue(hw, i, reason, refcounted);
505
506 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
507 }
508
509 void ieee80211_wake_queues(struct ieee80211_hw *hw)
510 {
511 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
512 IEEE80211_QUEUE_STOP_REASON_DRIVER,
513 false);
514 }
515 EXPORT_SYMBOL(ieee80211_wake_queues);
516
517 static unsigned int
518 ieee80211_get_vif_queues(struct ieee80211_local *local,
519 struct ieee80211_sub_if_data *sdata)
520 {
521 unsigned int queues;
522
523 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
524 int ac;
525
526 queues = 0;
527
528 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
529 queues |= BIT(sdata->vif.hw_queue[ac]);
530 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
531 queues |= BIT(sdata->vif.cab_queue);
532 } else {
533 /* all queues */
534 queues = BIT(local->hw.queues) - 1;
535 }
536
537 return queues;
538 }
539
540 void __ieee80211_flush_queues(struct ieee80211_local *local,
541 struct ieee80211_sub_if_data *sdata,
542 unsigned int queues, bool drop)
543 {
544 if (!local->ops->flush)
545 return;
546
547 /*
548 * If no queue was set, or if the HW doesn't support
549 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
550 */
551 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
552 queues = ieee80211_get_vif_queues(local, sdata);
553
554 ieee80211_stop_queues_by_reason(&local->hw, queues,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH,
556 false);
557
558 drv_flush(local, sdata, queues, drop);
559
560 ieee80211_wake_queues_by_reason(&local->hw, queues,
561 IEEE80211_QUEUE_STOP_REASON_FLUSH,
562 false);
563 }
564
565 void ieee80211_flush_queues(struct ieee80211_local *local,
566 struct ieee80211_sub_if_data *sdata, bool drop)
567 {
568 __ieee80211_flush_queues(local, sdata, 0, drop);
569 }
570
571 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
572 struct ieee80211_sub_if_data *sdata,
573 enum queue_stop_reason reason)
574 {
575 ieee80211_stop_queues_by_reason(&local->hw,
576 ieee80211_get_vif_queues(local, sdata),
577 reason, true);
578 }
579
580 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
581 struct ieee80211_sub_if_data *sdata,
582 enum queue_stop_reason reason)
583 {
584 ieee80211_wake_queues_by_reason(&local->hw,
585 ieee80211_get_vif_queues(local, sdata),
586 reason, true);
587 }
588
589 static void __iterate_interfaces(struct ieee80211_local *local,
590 u32 iter_flags,
591 void (*iterator)(void *data, u8 *mac,
592 struct ieee80211_vif *vif),
593 void *data)
594 {
595 struct ieee80211_sub_if_data *sdata;
596 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
597
598 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
599 switch (sdata->vif.type) {
600 case NL80211_IFTYPE_MONITOR:
601 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
602 continue;
603 break;
604 case NL80211_IFTYPE_AP_VLAN:
605 continue;
606 default:
607 break;
608 }
609 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
610 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
611 continue;
612 if (ieee80211_sdata_running(sdata) || !active_only)
613 iterator(data, sdata->vif.addr,
614 &sdata->vif);
615 }
616
617 sdata = rcu_dereference_check(local->monitor_sdata,
618 lockdep_is_held(&local->iflist_mtx) ||
619 lockdep_rtnl_is_held());
620 if (sdata &&
621 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
622 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
623 iterator(data, sdata->vif.addr, &sdata->vif);
624 }
625
626 void ieee80211_iterate_interfaces(
627 struct ieee80211_hw *hw, u32 iter_flags,
628 void (*iterator)(void *data, u8 *mac,
629 struct ieee80211_vif *vif),
630 void *data)
631 {
632 struct ieee80211_local *local = hw_to_local(hw);
633
634 mutex_lock(&local->iflist_mtx);
635 __iterate_interfaces(local, iter_flags, iterator, data);
636 mutex_unlock(&local->iflist_mtx);
637 }
638 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
639
640 void ieee80211_iterate_active_interfaces_atomic(
641 struct ieee80211_hw *hw, u32 iter_flags,
642 void (*iterator)(void *data, u8 *mac,
643 struct ieee80211_vif *vif),
644 void *data)
645 {
646 struct ieee80211_local *local = hw_to_local(hw);
647
648 rcu_read_lock();
649 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
650 iterator, data);
651 rcu_read_unlock();
652 }
653 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
654
655 void ieee80211_iterate_active_interfaces_rtnl(
656 struct ieee80211_hw *hw, u32 iter_flags,
657 void (*iterator)(void *data, u8 *mac,
658 struct ieee80211_vif *vif),
659 void *data)
660 {
661 struct ieee80211_local *local = hw_to_local(hw);
662
663 ASSERT_RTNL();
664
665 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
666 iterator, data);
667 }
668 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
669
670 static void __iterate_stations(struct ieee80211_local *local,
671 void (*iterator)(void *data,
672 struct ieee80211_sta *sta),
673 void *data)
674 {
675 struct sta_info *sta;
676
677 list_for_each_entry_rcu(sta, &local->sta_list, list) {
678 if (!sta->uploaded)
679 continue;
680
681 iterator(data, &sta->sta);
682 }
683 }
684
685 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
686 void (*iterator)(void *data,
687 struct ieee80211_sta *sta),
688 void *data)
689 {
690 struct ieee80211_local *local = hw_to_local(hw);
691
692 rcu_read_lock();
693 __iterate_stations(local, iterator, data);
694 rcu_read_unlock();
695 }
696 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
697
698 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
699 {
700 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
701
702 if (!ieee80211_sdata_running(sdata) ||
703 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
704 return NULL;
705 return &sdata->vif;
706 }
707 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
708
709 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
710 {
711 struct ieee80211_sub_if_data *sdata;
712
713 if (!vif)
714 return NULL;
715
716 sdata = vif_to_sdata(vif);
717
718 if (!ieee80211_sdata_running(sdata) ||
719 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
720 return NULL;
721
722 return &sdata->wdev;
723 }
724 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
725
726 /*
727 * Nothing should have been stuffed into the workqueue during
728 * the suspend->resume cycle. Since we can't check each caller
729 * of this function if we are already quiescing / suspended,
730 * check here and don't WARN since this can actually happen when
731 * the rx path (for example) is racing against __ieee80211_suspend
732 * and suspending / quiescing was set after the rx path checked
733 * them.
734 */
735 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
736 {
737 if (local->quiescing || (local->suspended && !local->resuming)) {
738 pr_warn("queueing ieee80211 work while going to suspend\n");
739 return false;
740 }
741
742 return true;
743 }
744
745 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
746 {
747 struct ieee80211_local *local = hw_to_local(hw);
748
749 if (!ieee80211_can_queue_work(local))
750 return;
751
752 queue_work(local->workqueue, work);
753 }
754 EXPORT_SYMBOL(ieee80211_queue_work);
755
756 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
757 struct delayed_work *dwork,
758 unsigned long delay)
759 {
760 struct ieee80211_local *local = hw_to_local(hw);
761
762 if (!ieee80211_can_queue_work(local))
763 return;
764
765 queue_delayed_work(local->workqueue, dwork, delay);
766 }
767 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
768
769 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
770 struct ieee802_11_elems *elems,
771 u64 filter, u32 crc)
772 {
773 size_t left = len;
774 const u8 *pos = start;
775 bool calc_crc = filter != 0;
776 DECLARE_BITMAP(seen_elems, 256);
777 const u8 *ie;
778
779 bitmap_zero(seen_elems, 256);
780 memset(elems, 0, sizeof(*elems));
781 elems->ie_start = start;
782 elems->total_len = len;
783
784 while (left >= 2) {
785 u8 id, elen;
786 bool elem_parse_failed;
787
788 id = *pos++;
789 elen = *pos++;
790 left -= 2;
791
792 if (elen > left) {
793 elems->parse_error = true;
794 break;
795 }
796
797 switch (id) {
798 case WLAN_EID_SSID:
799 case WLAN_EID_SUPP_RATES:
800 case WLAN_EID_FH_PARAMS:
801 case WLAN_EID_DS_PARAMS:
802 case WLAN_EID_CF_PARAMS:
803 case WLAN_EID_TIM:
804 case WLAN_EID_IBSS_PARAMS:
805 case WLAN_EID_CHALLENGE:
806 case WLAN_EID_RSN:
807 case WLAN_EID_ERP_INFO:
808 case WLAN_EID_EXT_SUPP_RATES:
809 case WLAN_EID_HT_CAPABILITY:
810 case WLAN_EID_HT_OPERATION:
811 case WLAN_EID_VHT_CAPABILITY:
812 case WLAN_EID_VHT_OPERATION:
813 case WLAN_EID_MESH_ID:
814 case WLAN_EID_MESH_CONFIG:
815 case WLAN_EID_PEER_MGMT:
816 case WLAN_EID_PREQ:
817 case WLAN_EID_PREP:
818 case WLAN_EID_PERR:
819 case WLAN_EID_RANN:
820 case WLAN_EID_CHANNEL_SWITCH:
821 case WLAN_EID_EXT_CHANSWITCH_ANN:
822 case WLAN_EID_COUNTRY:
823 case WLAN_EID_PWR_CONSTRAINT:
824 case WLAN_EID_TIMEOUT_INTERVAL:
825 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
826 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
827 case WLAN_EID_CHAN_SWITCH_PARAM:
828 case WLAN_EID_EXT_CAPABILITY:
829 case WLAN_EID_CHAN_SWITCH_TIMING:
830 case WLAN_EID_LINK_ID:
831 /*
832 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
833 * that if the content gets bigger it might be needed more than once
834 */
835 if (test_bit(id, seen_elems)) {
836 elems->parse_error = true;
837 left -= elen;
838 pos += elen;
839 continue;
840 }
841 break;
842 }
843
844 if (calc_crc && id < 64 && (filter & (1ULL << id)))
845 crc = crc32_be(crc, pos - 2, elen + 2);
846
847 elem_parse_failed = false;
848
849 switch (id) {
850 case WLAN_EID_LINK_ID:
851 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
852 elem_parse_failed = true;
853 break;
854 }
855 elems->lnk_id = (void *)(pos - 2);
856 break;
857 case WLAN_EID_CHAN_SWITCH_TIMING:
858 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
859 elem_parse_failed = true;
860 break;
861 }
862 elems->ch_sw_timing = (void *)pos;
863 break;
864 case WLAN_EID_EXT_CAPABILITY:
865 elems->ext_capab = pos;
866 elems->ext_capab_len = elen;
867 break;
868 case WLAN_EID_SSID:
869 elems->ssid = pos;
870 elems->ssid_len = elen;
871 break;
872 case WLAN_EID_SUPP_RATES:
873 elems->supp_rates = pos;
874 elems->supp_rates_len = elen;
875 break;
876 case WLAN_EID_DS_PARAMS:
877 if (elen >= 1)
878 elems->ds_params = pos;
879 else
880 elem_parse_failed = true;
881 break;
882 case WLAN_EID_TIM:
883 if (elen >= sizeof(struct ieee80211_tim_ie)) {
884 elems->tim = (void *)pos;
885 elems->tim_len = elen;
886 } else
887 elem_parse_failed = true;
888 break;
889 case WLAN_EID_CHALLENGE:
890 elems->challenge = pos;
891 elems->challenge_len = elen;
892 break;
893 case WLAN_EID_VENDOR_SPECIFIC:
894 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
895 pos[2] == 0xf2) {
896 /* Microsoft OUI (00:50:F2) */
897
898 if (calc_crc)
899 crc = crc32_be(crc, pos - 2, elen + 2);
900
901 if (elen >= 5 && pos[3] == 2) {
902 /* OUI Type 2 - WMM IE */
903 if (pos[4] == 0) {
904 elems->wmm_info = pos;
905 elems->wmm_info_len = elen;
906 } else if (pos[4] == 1) {
907 elems->wmm_param = pos;
908 elems->wmm_param_len = elen;
909 }
910 }
911 }
912 break;
913 case WLAN_EID_RSN:
914 elems->rsn = pos;
915 elems->rsn_len = elen;
916 break;
917 case WLAN_EID_ERP_INFO:
918 if (elen >= 1)
919 elems->erp_info = pos;
920 else
921 elem_parse_failed = true;
922 break;
923 case WLAN_EID_EXT_SUPP_RATES:
924 elems->ext_supp_rates = pos;
925 elems->ext_supp_rates_len = elen;
926 break;
927 case WLAN_EID_HT_CAPABILITY:
928 if (elen >= sizeof(struct ieee80211_ht_cap))
929 elems->ht_cap_elem = (void *)pos;
930 else
931 elem_parse_failed = true;
932 break;
933 case WLAN_EID_HT_OPERATION:
934 if (elen >= sizeof(struct ieee80211_ht_operation))
935 elems->ht_operation = (void *)pos;
936 else
937 elem_parse_failed = true;
938 break;
939 case WLAN_EID_VHT_CAPABILITY:
940 if (elen >= sizeof(struct ieee80211_vht_cap))
941 elems->vht_cap_elem = (void *)pos;
942 else
943 elem_parse_failed = true;
944 break;
945 case WLAN_EID_VHT_OPERATION:
946 if (elen >= sizeof(struct ieee80211_vht_operation))
947 elems->vht_operation = (void *)pos;
948 else
949 elem_parse_failed = true;
950 break;
951 case WLAN_EID_OPMODE_NOTIF:
952 if (elen > 0)
953 elems->opmode_notif = pos;
954 else
955 elem_parse_failed = true;
956 break;
957 case WLAN_EID_MESH_ID:
958 elems->mesh_id = pos;
959 elems->mesh_id_len = elen;
960 break;
961 case WLAN_EID_MESH_CONFIG:
962 if (elen >= sizeof(struct ieee80211_meshconf_ie))
963 elems->mesh_config = (void *)pos;
964 else
965 elem_parse_failed = true;
966 break;
967 case WLAN_EID_PEER_MGMT:
968 elems->peering = pos;
969 elems->peering_len = elen;
970 break;
971 case WLAN_EID_MESH_AWAKE_WINDOW:
972 if (elen >= 2)
973 elems->awake_window = (void *)pos;
974 break;
975 case WLAN_EID_PREQ:
976 elems->preq = pos;
977 elems->preq_len = elen;
978 break;
979 case WLAN_EID_PREP:
980 elems->prep = pos;
981 elems->prep_len = elen;
982 break;
983 case WLAN_EID_PERR:
984 elems->perr = pos;
985 elems->perr_len = elen;
986 break;
987 case WLAN_EID_RANN:
988 if (elen >= sizeof(struct ieee80211_rann_ie))
989 elems->rann = (void *)pos;
990 else
991 elem_parse_failed = true;
992 break;
993 case WLAN_EID_CHANNEL_SWITCH:
994 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
995 elem_parse_failed = true;
996 break;
997 }
998 elems->ch_switch_ie = (void *)pos;
999 break;
1000 case WLAN_EID_EXT_CHANSWITCH_ANN:
1001 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1002 elem_parse_failed = true;
1003 break;
1004 }
1005 elems->ext_chansw_ie = (void *)pos;
1006 break;
1007 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1008 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1009 elem_parse_failed = true;
1010 break;
1011 }
1012 elems->sec_chan_offs = (void *)pos;
1013 break;
1014 case WLAN_EID_CHAN_SWITCH_PARAM:
1015 if (elen !=
1016 sizeof(*elems->mesh_chansw_params_ie)) {
1017 elem_parse_failed = true;
1018 break;
1019 }
1020 elems->mesh_chansw_params_ie = (void *)pos;
1021 break;
1022 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1023 if (!action ||
1024 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1025 elem_parse_failed = true;
1026 break;
1027 }
1028 elems->wide_bw_chansw_ie = (void *)pos;
1029 break;
1030 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1031 if (action) {
1032 elem_parse_failed = true;
1033 break;
1034 }
1035 /*
1036 * This is a bit tricky, but as we only care about
1037 * the wide bandwidth channel switch element, so
1038 * just parse it out manually.
1039 */
1040 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1041 pos, elen);
1042 if (ie) {
1043 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1044 elems->wide_bw_chansw_ie =
1045 (void *)(ie + 2);
1046 else
1047 elem_parse_failed = true;
1048 }
1049 break;
1050 case WLAN_EID_COUNTRY:
1051 elems->country_elem = pos;
1052 elems->country_elem_len = elen;
1053 break;
1054 case WLAN_EID_PWR_CONSTRAINT:
1055 if (elen != 1) {
1056 elem_parse_failed = true;
1057 break;
1058 }
1059 elems->pwr_constr_elem = pos;
1060 break;
1061 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1062 /* Lots of different options exist, but we only care
1063 * about the Dynamic Transmit Power Control element.
1064 * First check for the Cisco OUI, then for the DTPC
1065 * tag (0x00).
1066 */
1067 if (elen < 4) {
1068 elem_parse_failed = true;
1069 break;
1070 }
1071
1072 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1073 pos[2] != 0x96 || pos[3] != 0x00)
1074 break;
1075
1076 if (elen != 6) {
1077 elem_parse_failed = true;
1078 break;
1079 }
1080
1081 if (calc_crc)
1082 crc = crc32_be(crc, pos - 2, elen + 2);
1083
1084 elems->cisco_dtpc_elem = pos;
1085 break;
1086 case WLAN_EID_TIMEOUT_INTERVAL:
1087 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1088 elems->timeout_int = (void *)pos;
1089 else
1090 elem_parse_failed = true;
1091 break;
1092 default:
1093 break;
1094 }
1095
1096 if (elem_parse_failed)
1097 elems->parse_error = true;
1098 else
1099 __set_bit(id, seen_elems);
1100
1101 left -= elen;
1102 pos += elen;
1103 }
1104
1105 if (left != 0)
1106 elems->parse_error = true;
1107
1108 return crc;
1109 }
1110
1111 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1112 bool bss_notify, bool enable_qos)
1113 {
1114 struct ieee80211_local *local = sdata->local;
1115 struct ieee80211_tx_queue_params qparam;
1116 struct ieee80211_chanctx_conf *chanctx_conf;
1117 int ac;
1118 bool use_11b;
1119 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1120 int aCWmin, aCWmax;
1121
1122 if (!local->ops->conf_tx)
1123 return;
1124
1125 if (local->hw.queues < IEEE80211_NUM_ACS)
1126 return;
1127
1128 memset(&qparam, 0, sizeof(qparam));
1129
1130 rcu_read_lock();
1131 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1132 use_11b = (chanctx_conf &&
1133 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1134 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1135 rcu_read_unlock();
1136
1137 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1138
1139 /* Set defaults according to 802.11-2007 Table 7-37 */
1140 aCWmax = 1023;
1141 if (use_11b)
1142 aCWmin = 31;
1143 else
1144 aCWmin = 15;
1145
1146 /* Confiure old 802.11b/g medium access rules. */
1147 qparam.cw_max = aCWmax;
1148 qparam.cw_min = aCWmin;
1149 qparam.txop = 0;
1150 qparam.aifs = 2;
1151
1152 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1153 /* Update if QoS is enabled. */
1154 if (enable_qos) {
1155 switch (ac) {
1156 case IEEE80211_AC_BK:
1157 qparam.cw_max = aCWmax;
1158 qparam.cw_min = aCWmin;
1159 qparam.txop = 0;
1160 if (is_ocb)
1161 qparam.aifs = 9;
1162 else
1163 qparam.aifs = 7;
1164 break;
1165 /* never happens but let's not leave undefined */
1166 default:
1167 case IEEE80211_AC_BE:
1168 qparam.cw_max = aCWmax;
1169 qparam.cw_min = aCWmin;
1170 qparam.txop = 0;
1171 if (is_ocb)
1172 qparam.aifs = 6;
1173 else
1174 qparam.aifs = 3;
1175 break;
1176 case IEEE80211_AC_VI:
1177 qparam.cw_max = aCWmin;
1178 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1179 if (is_ocb)
1180 qparam.txop = 0;
1181 else if (use_11b)
1182 qparam.txop = 6016/32;
1183 else
1184 qparam.txop = 3008/32;
1185
1186 if (is_ocb)
1187 qparam.aifs = 3;
1188 else
1189 qparam.aifs = 2;
1190 break;
1191 case IEEE80211_AC_VO:
1192 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1193 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1194 if (is_ocb)
1195 qparam.txop = 0;
1196 else if (use_11b)
1197 qparam.txop = 3264/32;
1198 else
1199 qparam.txop = 1504/32;
1200 qparam.aifs = 2;
1201 break;
1202 }
1203 }
1204
1205 qparam.uapsd = false;
1206
1207 sdata->tx_conf[ac] = qparam;
1208 drv_conf_tx(local, sdata, ac, &qparam);
1209 }
1210
1211 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1212 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1213 sdata->vif.bss_conf.qos = enable_qos;
1214 if (bss_notify)
1215 ieee80211_bss_info_change_notify(sdata,
1216 BSS_CHANGED_QOS);
1217 }
1218 }
1219
1220 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1221 u16 transaction, u16 auth_alg, u16 status,
1222 const u8 *extra, size_t extra_len, const u8 *da,
1223 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1224 u32 tx_flags)
1225 {
1226 struct ieee80211_local *local = sdata->local;
1227 struct sk_buff *skb;
1228 struct ieee80211_mgmt *mgmt;
1229 int err;
1230
1231 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1232 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1233 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1234 if (!skb)
1235 return;
1236
1237 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1238
1239 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1240 memset(mgmt, 0, 24 + 6);
1241 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1242 IEEE80211_STYPE_AUTH);
1243 memcpy(mgmt->da, da, ETH_ALEN);
1244 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1245 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1246 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1247 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1248 mgmt->u.auth.status_code = cpu_to_le16(status);
1249 if (extra)
1250 memcpy(skb_put(skb, extra_len), extra, extra_len);
1251
1252 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1253 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1254 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1255 WARN_ON(err);
1256 }
1257
1258 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1259 tx_flags;
1260 ieee80211_tx_skb(sdata, skb);
1261 }
1262
1263 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1264 const u8 *bssid, u16 stype, u16 reason,
1265 bool send_frame, u8 *frame_buf)
1266 {
1267 struct ieee80211_local *local = sdata->local;
1268 struct sk_buff *skb;
1269 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1270
1271 /* build frame */
1272 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1273 mgmt->duration = 0; /* initialize only */
1274 mgmt->seq_ctrl = 0; /* initialize only */
1275 memcpy(mgmt->da, bssid, ETH_ALEN);
1276 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1277 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1278 /* u.deauth.reason_code == u.disassoc.reason_code */
1279 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1280
1281 if (send_frame) {
1282 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1283 IEEE80211_DEAUTH_FRAME_LEN);
1284 if (!skb)
1285 return;
1286
1287 skb_reserve(skb, local->hw.extra_tx_headroom);
1288
1289 /* copy in frame */
1290 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1291 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1292
1293 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1294 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1295 IEEE80211_SKB_CB(skb)->flags |=
1296 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1297
1298 ieee80211_tx_skb(sdata, skb);
1299 }
1300 }
1301
1302 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1303 u8 *buffer, size_t buffer_len,
1304 const u8 *ie, size_t ie_len,
1305 enum nl80211_band band,
1306 u32 rate_mask,
1307 struct cfg80211_chan_def *chandef,
1308 size_t *offset)
1309 {
1310 struct ieee80211_supported_band *sband;
1311 u8 *pos = buffer, *end = buffer + buffer_len;
1312 size_t noffset;
1313 int supp_rates_len, i;
1314 u8 rates[32];
1315 int num_rates;
1316 int ext_rates_len;
1317 int shift;
1318 u32 rate_flags;
1319 bool have_80mhz = false;
1320
1321 *offset = 0;
1322
1323 sband = local->hw.wiphy->bands[band];
1324 if (WARN_ON_ONCE(!sband))
1325 return 0;
1326
1327 rate_flags = ieee80211_chandef_rate_flags(chandef);
1328 shift = ieee80211_chandef_get_shift(chandef);
1329
1330 num_rates = 0;
1331 for (i = 0; i < sband->n_bitrates; i++) {
1332 if ((BIT(i) & rate_mask) == 0)
1333 continue; /* skip rate */
1334 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1335 continue;
1336
1337 rates[num_rates++] =
1338 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1339 (1 << shift) * 5);
1340 }
1341
1342 supp_rates_len = min_t(int, num_rates, 8);
1343
1344 if (end - pos < 2 + supp_rates_len)
1345 goto out_err;
1346 *pos++ = WLAN_EID_SUPP_RATES;
1347 *pos++ = supp_rates_len;
1348 memcpy(pos, rates, supp_rates_len);
1349 pos += supp_rates_len;
1350
1351 /* insert "request information" if in custom IEs */
1352 if (ie && ie_len) {
1353 static const u8 before_extrates[] = {
1354 WLAN_EID_SSID,
1355 WLAN_EID_SUPP_RATES,
1356 WLAN_EID_REQUEST,
1357 };
1358 noffset = ieee80211_ie_split(ie, ie_len,
1359 before_extrates,
1360 ARRAY_SIZE(before_extrates),
1361 *offset);
1362 if (end - pos < noffset - *offset)
1363 goto out_err;
1364 memcpy(pos, ie + *offset, noffset - *offset);
1365 pos += noffset - *offset;
1366 *offset = noffset;
1367 }
1368
1369 ext_rates_len = num_rates - supp_rates_len;
1370 if (ext_rates_len > 0) {
1371 if (end - pos < 2 + ext_rates_len)
1372 goto out_err;
1373 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1374 *pos++ = ext_rates_len;
1375 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1376 pos += ext_rates_len;
1377 }
1378
1379 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1380 if (end - pos < 3)
1381 goto out_err;
1382 *pos++ = WLAN_EID_DS_PARAMS;
1383 *pos++ = 1;
1384 *pos++ = ieee80211_frequency_to_channel(
1385 chandef->chan->center_freq);
1386 }
1387
1388 /* insert custom IEs that go before HT */
1389 if (ie && ie_len) {
1390 static const u8 before_ht[] = {
1391 WLAN_EID_SSID,
1392 WLAN_EID_SUPP_RATES,
1393 WLAN_EID_REQUEST,
1394 WLAN_EID_EXT_SUPP_RATES,
1395 WLAN_EID_DS_PARAMS,
1396 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1397 };
1398 noffset = ieee80211_ie_split(ie, ie_len,
1399 before_ht, ARRAY_SIZE(before_ht),
1400 *offset);
1401 if (end - pos < noffset - *offset)
1402 goto out_err;
1403 memcpy(pos, ie + *offset, noffset - *offset);
1404 pos += noffset - *offset;
1405 *offset = noffset;
1406 }
1407
1408 if (sband->ht_cap.ht_supported) {
1409 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1410 goto out_err;
1411 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1412 sband->ht_cap.cap);
1413 }
1414
1415 /*
1416 * If adding more here, adjust code in main.c
1417 * that calculates local->scan_ies_len.
1418 */
1419
1420 /* insert custom IEs that go before VHT */
1421 if (ie && ie_len) {
1422 static const u8 before_vht[] = {
1423 WLAN_EID_SSID,
1424 WLAN_EID_SUPP_RATES,
1425 WLAN_EID_REQUEST,
1426 WLAN_EID_EXT_SUPP_RATES,
1427 WLAN_EID_DS_PARAMS,
1428 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1429 WLAN_EID_HT_CAPABILITY,
1430 WLAN_EID_BSS_COEX_2040,
1431 WLAN_EID_EXT_CAPABILITY,
1432 WLAN_EID_SSID_LIST,
1433 WLAN_EID_CHANNEL_USAGE,
1434 WLAN_EID_INTERWORKING,
1435 /* mesh ID can't happen here */
1436 /* 60 GHz can't happen here right now */
1437 };
1438 noffset = ieee80211_ie_split(ie, ie_len,
1439 before_vht, ARRAY_SIZE(before_vht),
1440 *offset);
1441 if (end - pos < noffset - *offset)
1442 goto out_err;
1443 memcpy(pos, ie + *offset, noffset - *offset);
1444 pos += noffset - *offset;
1445 *offset = noffset;
1446 }
1447
1448 /* Check if any channel in this sband supports at least 80 MHz */
1449 for (i = 0; i < sband->n_channels; i++) {
1450 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1451 IEEE80211_CHAN_NO_80MHZ))
1452 continue;
1453
1454 have_80mhz = true;
1455 break;
1456 }
1457
1458 if (sband->vht_cap.vht_supported && have_80mhz) {
1459 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1460 goto out_err;
1461 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1462 sband->vht_cap.cap);
1463 }
1464
1465 return pos - buffer;
1466 out_err:
1467 WARN_ONCE(1, "not enough space for preq IEs\n");
1468 return pos - buffer;
1469 }
1470
1471 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1472 size_t buffer_len,
1473 struct ieee80211_scan_ies *ie_desc,
1474 const u8 *ie, size_t ie_len,
1475 u8 bands_used, u32 *rate_masks,
1476 struct cfg80211_chan_def *chandef)
1477 {
1478 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1479 int i;
1480
1481 memset(ie_desc, 0, sizeof(*ie_desc));
1482
1483 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1484 if (bands_used & BIT(i)) {
1485 pos += ieee80211_build_preq_ies_band(local,
1486 buffer + pos,
1487 buffer_len - pos,
1488 ie, ie_len, i,
1489 rate_masks[i],
1490 chandef,
1491 &custom_ie_offset);
1492 ie_desc->ies[i] = buffer + old_pos;
1493 ie_desc->len[i] = pos - old_pos;
1494 old_pos = pos;
1495 }
1496 }
1497
1498 /* add any remaining custom IEs */
1499 if (ie && ie_len) {
1500 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1501 "not enough space for preq custom IEs\n"))
1502 return pos;
1503 memcpy(buffer + pos, ie + custom_ie_offset,
1504 ie_len - custom_ie_offset);
1505 ie_desc->common_ies = buffer + pos;
1506 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1507 pos += ie_len - custom_ie_offset;
1508 }
1509
1510 return pos;
1511 };
1512
1513 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1514 const u8 *src, const u8 *dst,
1515 u32 ratemask,
1516 struct ieee80211_channel *chan,
1517 const u8 *ssid, size_t ssid_len,
1518 const u8 *ie, size_t ie_len,
1519 bool directed)
1520 {
1521 struct ieee80211_local *local = sdata->local;
1522 struct cfg80211_chan_def chandef;
1523 struct sk_buff *skb;
1524 struct ieee80211_mgmt *mgmt;
1525 int ies_len;
1526 u32 rate_masks[NUM_NL80211_BANDS] = {};
1527 struct ieee80211_scan_ies dummy_ie_desc;
1528
1529 /*
1530 * Do not send DS Channel parameter for directed probe requests
1531 * in order to maximize the chance that we get a response. Some
1532 * badly-behaved APs don't respond when this parameter is included.
1533 */
1534 chandef.width = sdata->vif.bss_conf.chandef.width;
1535 if (directed)
1536 chandef.chan = NULL;
1537 else
1538 chandef.chan = chan;
1539
1540 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1541 100 + ie_len);
1542 if (!skb)
1543 return NULL;
1544
1545 rate_masks[chan->band] = ratemask;
1546 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1547 skb_tailroom(skb), &dummy_ie_desc,
1548 ie, ie_len, BIT(chan->band),
1549 rate_masks, &chandef);
1550 skb_put(skb, ies_len);
1551
1552 if (dst) {
1553 mgmt = (struct ieee80211_mgmt *) skb->data;
1554 memcpy(mgmt->da, dst, ETH_ALEN);
1555 memcpy(mgmt->bssid, dst, ETH_ALEN);
1556 }
1557
1558 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1559
1560 return skb;
1561 }
1562
1563 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1564 const u8 *src, const u8 *dst,
1565 const u8 *ssid, size_t ssid_len,
1566 const u8 *ie, size_t ie_len,
1567 u32 ratemask, bool directed, u32 tx_flags,
1568 struct ieee80211_channel *channel, bool scan)
1569 {
1570 struct sk_buff *skb;
1571
1572 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1573 ssid, ssid_len,
1574 ie, ie_len, directed);
1575 if (skb) {
1576 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1577 if (scan)
1578 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1579 else
1580 ieee80211_tx_skb(sdata, skb);
1581 }
1582 }
1583
1584 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1585 struct ieee802_11_elems *elems,
1586 enum nl80211_band band, u32 *basic_rates)
1587 {
1588 struct ieee80211_supported_band *sband;
1589 size_t num_rates;
1590 u32 supp_rates, rate_flags;
1591 int i, j, shift;
1592 sband = sdata->local->hw.wiphy->bands[band];
1593
1594 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1595 shift = ieee80211_vif_get_shift(&sdata->vif);
1596
1597 if (WARN_ON(!sband))
1598 return 1;
1599
1600 num_rates = sband->n_bitrates;
1601 supp_rates = 0;
1602 for (i = 0; i < elems->supp_rates_len +
1603 elems->ext_supp_rates_len; i++) {
1604 u8 rate = 0;
1605 int own_rate;
1606 bool is_basic;
1607 if (i < elems->supp_rates_len)
1608 rate = elems->supp_rates[i];
1609 else if (elems->ext_supp_rates)
1610 rate = elems->ext_supp_rates
1611 [i - elems->supp_rates_len];
1612 own_rate = 5 * (rate & 0x7f);
1613 is_basic = !!(rate & 0x80);
1614
1615 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1616 continue;
1617
1618 for (j = 0; j < num_rates; j++) {
1619 int brate;
1620 if ((rate_flags & sband->bitrates[j].flags)
1621 != rate_flags)
1622 continue;
1623
1624 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1625 1 << shift);
1626
1627 if (brate == own_rate) {
1628 supp_rates |= BIT(j);
1629 if (basic_rates && is_basic)
1630 *basic_rates |= BIT(j);
1631 }
1632 }
1633 }
1634 return supp_rates;
1635 }
1636
1637 void ieee80211_stop_device(struct ieee80211_local *local)
1638 {
1639 ieee80211_led_radio(local, false);
1640 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1641
1642 cancel_work_sync(&local->reconfig_filter);
1643
1644 flush_workqueue(local->workqueue);
1645 drv_stop(local);
1646 }
1647
1648 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1649 bool aborted)
1650 {
1651 /* It's possible that we don't handle the scan completion in
1652 * time during suspend, so if it's still marked as completed
1653 * here, queue the work and flush it to clean things up.
1654 * Instead of calling the worker function directly here, we
1655 * really queue it to avoid potential races with other flows
1656 * scheduling the same work.
1657 */
1658 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1659 /* If coming from reconfiguration failure, abort the scan so
1660 * we don't attempt to continue a partial HW scan - which is
1661 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1662 * completed scan, and a 5 GHz portion is still pending.
1663 */
1664 if (aborted)
1665 set_bit(SCAN_ABORTED, &local->scanning);
1666 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1667 flush_delayed_work(&local->scan_work);
1668 }
1669 }
1670
1671 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1672 {
1673 struct ieee80211_sub_if_data *sdata;
1674 struct ieee80211_chanctx *ctx;
1675
1676 /*
1677 * We get here if during resume the device can't be restarted properly.
1678 * We might also get here if this happens during HW reset, which is a
1679 * slightly different situation and we need to drop all connections in
1680 * the latter case.
1681 *
1682 * Ask cfg80211 to turn off all interfaces, this will result in more
1683 * warnings but at least we'll then get into a clean stopped state.
1684 */
1685
1686 local->resuming = false;
1687 local->suspended = false;
1688 local->in_reconfig = false;
1689
1690 ieee80211_flush_completed_scan(local, true);
1691
1692 /* scheduled scan clearly can't be running any more, but tell
1693 * cfg80211 and clear local state
1694 */
1695 ieee80211_sched_scan_end(local);
1696
1697 list_for_each_entry(sdata, &local->interfaces, list)
1698 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1699
1700 /* Mark channel contexts as not being in the driver any more to avoid
1701 * removing them from the driver during the shutdown process...
1702 */
1703 mutex_lock(&local->chanctx_mtx);
1704 list_for_each_entry(ctx, &local->chanctx_list, list)
1705 ctx->driver_present = false;
1706 mutex_unlock(&local->chanctx_mtx);
1707
1708 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1709 }
1710
1711 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1712 struct ieee80211_sub_if_data *sdata)
1713 {
1714 struct ieee80211_chanctx_conf *conf;
1715 struct ieee80211_chanctx *ctx;
1716
1717 if (!local->use_chanctx)
1718 return;
1719
1720 mutex_lock(&local->chanctx_mtx);
1721 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1722 lockdep_is_held(&local->chanctx_mtx));
1723 if (conf) {
1724 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1725 drv_assign_vif_chanctx(local, sdata, ctx);
1726 }
1727 mutex_unlock(&local->chanctx_mtx);
1728 }
1729
1730 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1731 {
1732 struct ieee80211_local *local = sdata->local;
1733 struct sta_info *sta;
1734
1735 /* add STAs back */
1736 mutex_lock(&local->sta_mtx);
1737 list_for_each_entry(sta, &local->sta_list, list) {
1738 enum ieee80211_sta_state state;
1739
1740 if (!sta->uploaded || sta->sdata != sdata)
1741 continue;
1742
1743 for (state = IEEE80211_STA_NOTEXIST;
1744 state < sta->sta_state; state++)
1745 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1746 state + 1));
1747 }
1748 mutex_unlock(&local->sta_mtx);
1749 }
1750
1751 int ieee80211_reconfig(struct ieee80211_local *local)
1752 {
1753 struct ieee80211_hw *hw = &local->hw;
1754 struct ieee80211_sub_if_data *sdata;
1755 struct ieee80211_chanctx *ctx;
1756 struct sta_info *sta;
1757 int res, i;
1758 bool reconfig_due_to_wowlan = false;
1759 struct ieee80211_sub_if_data *sched_scan_sdata;
1760 struct cfg80211_sched_scan_request *sched_scan_req;
1761 bool sched_scan_stopped = false;
1762 bool suspended = local->suspended;
1763
1764 /* nothing to do if HW shouldn't run */
1765 if (!local->open_count)
1766 goto wake_up;
1767
1768 #ifdef CONFIG_PM
1769 if (suspended)
1770 local->resuming = true;
1771
1772 if (local->wowlan) {
1773 /*
1774 * In the wowlan case, both mac80211 and the device
1775 * are functional when the resume op is called, so
1776 * clear local->suspended so the device could operate
1777 * normally (e.g. pass rx frames).
1778 */
1779 local->suspended = false;
1780 res = drv_resume(local);
1781 local->wowlan = false;
1782 if (res < 0) {
1783 local->resuming = false;
1784 return res;
1785 }
1786 if (res == 0)
1787 goto wake_up;
1788 WARN_ON(res > 1);
1789 /*
1790 * res is 1, which means the driver requested
1791 * to go through a regular reset on wakeup.
1792 * restore local->suspended in this case.
1793 */
1794 reconfig_due_to_wowlan = true;
1795 local->suspended = true;
1796 }
1797 #endif
1798
1799 /*
1800 * In case of hw_restart during suspend (without wowlan),
1801 * cancel restart work, as we are reconfiguring the device
1802 * anyway.
1803 * Note that restart_work is scheduled on a frozen workqueue,
1804 * so we can't deadlock in this case.
1805 */
1806 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1807 cancel_work_sync(&local->restart_work);
1808
1809 local->started = false;
1810
1811 /*
1812 * Upon resume hardware can sometimes be goofy due to
1813 * various platform / driver / bus issues, so restarting
1814 * the device may at times not work immediately. Propagate
1815 * the error.
1816 */
1817 res = drv_start(local);
1818 if (res) {
1819 if (suspended)
1820 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1821 else
1822 WARN(1, "Hardware became unavailable during restart.\n");
1823 ieee80211_handle_reconfig_failure(local);
1824 return res;
1825 }
1826
1827 /* setup fragmentation threshold */
1828 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1829
1830 /* setup RTS threshold */
1831 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1832
1833 /* reset coverage class */
1834 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1835
1836 ieee80211_led_radio(local, true);
1837 ieee80211_mod_tpt_led_trig(local,
1838 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1839
1840 /* add interfaces */
1841 sdata = rtnl_dereference(local->monitor_sdata);
1842 if (sdata) {
1843 /* in HW restart it exists already */
1844 WARN_ON(local->resuming);
1845 res = drv_add_interface(local, sdata);
1846 if (WARN_ON(res)) {
1847 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1848 synchronize_net();
1849 kfree(sdata);
1850 }
1851 }
1852
1853 list_for_each_entry(sdata, &local->interfaces, list) {
1854 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1855 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1856 ieee80211_sdata_running(sdata)) {
1857 res = drv_add_interface(local, sdata);
1858 if (WARN_ON(res))
1859 break;
1860 }
1861 }
1862
1863 /* If adding any of the interfaces failed above, roll back and
1864 * report failure.
1865 */
1866 if (res) {
1867 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1868 list)
1869 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1870 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1871 ieee80211_sdata_running(sdata))
1872 drv_remove_interface(local, sdata);
1873 ieee80211_handle_reconfig_failure(local);
1874 return res;
1875 }
1876
1877 /* add channel contexts */
1878 if (local->use_chanctx) {
1879 mutex_lock(&local->chanctx_mtx);
1880 list_for_each_entry(ctx, &local->chanctx_list, list)
1881 if (ctx->replace_state !=
1882 IEEE80211_CHANCTX_REPLACES_OTHER)
1883 WARN_ON(drv_add_chanctx(local, ctx));
1884 mutex_unlock(&local->chanctx_mtx);
1885
1886 sdata = rtnl_dereference(local->monitor_sdata);
1887 if (sdata && ieee80211_sdata_running(sdata))
1888 ieee80211_assign_chanctx(local, sdata);
1889 }
1890
1891 /* reconfigure hardware */
1892 ieee80211_hw_config(local, ~0);
1893
1894 ieee80211_configure_filter(local);
1895
1896 /* Finally also reconfigure all the BSS information */
1897 list_for_each_entry(sdata, &local->interfaces, list) {
1898 u32 changed;
1899
1900 if (!ieee80211_sdata_running(sdata))
1901 continue;
1902
1903 ieee80211_assign_chanctx(local, sdata);
1904
1905 switch (sdata->vif.type) {
1906 case NL80211_IFTYPE_AP_VLAN:
1907 case NL80211_IFTYPE_MONITOR:
1908 break;
1909 default:
1910 ieee80211_reconfig_stations(sdata);
1911 /* fall through */
1912 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1913 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1914 drv_conf_tx(local, sdata, i,
1915 &sdata->tx_conf[i]);
1916 break;
1917 }
1918
1919 /* common change flags for all interface types */
1920 changed = BSS_CHANGED_ERP_CTS_PROT |
1921 BSS_CHANGED_ERP_PREAMBLE |
1922 BSS_CHANGED_ERP_SLOT |
1923 BSS_CHANGED_HT |
1924 BSS_CHANGED_BASIC_RATES |
1925 BSS_CHANGED_BEACON_INT |
1926 BSS_CHANGED_BSSID |
1927 BSS_CHANGED_CQM |
1928 BSS_CHANGED_QOS |
1929 BSS_CHANGED_IDLE |
1930 BSS_CHANGED_TXPOWER;
1931
1932 if (sdata->vif.mu_mimo_owner)
1933 changed |= BSS_CHANGED_MU_GROUPS;
1934
1935 switch (sdata->vif.type) {
1936 case NL80211_IFTYPE_STATION:
1937 changed |= BSS_CHANGED_ASSOC |
1938 BSS_CHANGED_ARP_FILTER |
1939 BSS_CHANGED_PS;
1940
1941 /* Re-send beacon info report to the driver */
1942 if (sdata->u.mgd.have_beacon)
1943 changed |= BSS_CHANGED_BEACON_INFO;
1944
1945 sdata_lock(sdata);
1946 ieee80211_bss_info_change_notify(sdata, changed);
1947 sdata_unlock(sdata);
1948 break;
1949 case NL80211_IFTYPE_OCB:
1950 changed |= BSS_CHANGED_OCB;
1951 ieee80211_bss_info_change_notify(sdata, changed);
1952 break;
1953 case NL80211_IFTYPE_ADHOC:
1954 changed |= BSS_CHANGED_IBSS;
1955 /* fall through */
1956 case NL80211_IFTYPE_AP:
1957 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1958
1959 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1960 changed |= BSS_CHANGED_AP_PROBE_RESP;
1961
1962 if (rcu_access_pointer(sdata->u.ap.beacon))
1963 drv_start_ap(local, sdata);
1964 }
1965
1966 /* fall through */
1967 case NL80211_IFTYPE_MESH_POINT:
1968 if (sdata->vif.bss_conf.enable_beacon) {
1969 changed |= BSS_CHANGED_BEACON |
1970 BSS_CHANGED_BEACON_ENABLED;
1971 ieee80211_bss_info_change_notify(sdata, changed);
1972 }
1973 break;
1974 case NL80211_IFTYPE_WDS:
1975 case NL80211_IFTYPE_AP_VLAN:
1976 case NL80211_IFTYPE_MONITOR:
1977 case NL80211_IFTYPE_P2P_DEVICE:
1978 /* nothing to do */
1979 break;
1980 case NL80211_IFTYPE_UNSPECIFIED:
1981 case NUM_NL80211_IFTYPES:
1982 case NL80211_IFTYPE_P2P_CLIENT:
1983 case NL80211_IFTYPE_P2P_GO:
1984 WARN_ON(1);
1985 break;
1986 }
1987 }
1988
1989 ieee80211_recalc_ps(local);
1990
1991 /*
1992 * The sta might be in psm against the ap (e.g. because
1993 * this was the state before a hw restart), so we
1994 * explicitly send a null packet in order to make sure
1995 * it'll sync against the ap (and get out of psm).
1996 */
1997 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1998 list_for_each_entry(sdata, &local->interfaces, list) {
1999 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2000 continue;
2001 if (!sdata->u.mgd.associated)
2002 continue;
2003
2004 ieee80211_send_nullfunc(local, sdata, false);
2005 }
2006 }
2007
2008 /* APs are now beaconing, add back stations */
2009 mutex_lock(&local->sta_mtx);
2010 list_for_each_entry(sta, &local->sta_list, list) {
2011 enum ieee80211_sta_state state;
2012
2013 if (!sta->uploaded)
2014 continue;
2015
2016 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2017 continue;
2018
2019 for (state = IEEE80211_STA_NOTEXIST;
2020 state < sta->sta_state; state++)
2021 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2022 state + 1));
2023 }
2024 mutex_unlock(&local->sta_mtx);
2025
2026 /* add back keys */
2027 list_for_each_entry(sdata, &local->interfaces, list)
2028 ieee80211_reset_crypto_tx_tailroom(sdata);
2029
2030 list_for_each_entry(sdata, &local->interfaces, list)
2031 if (ieee80211_sdata_running(sdata))
2032 ieee80211_enable_keys(sdata);
2033
2034 /* Reconfigure sched scan if it was interrupted by FW restart */
2035 mutex_lock(&local->mtx);
2036 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2037 lockdep_is_held(&local->mtx));
2038 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2039 lockdep_is_held(&local->mtx));
2040 if (sched_scan_sdata && sched_scan_req)
2041 /*
2042 * Sched scan stopped, but we don't want to report it. Instead,
2043 * we're trying to reschedule. However, if more than one scan
2044 * plan was set, we cannot reschedule since we don't know which
2045 * scan plan was currently running (and some scan plans may have
2046 * already finished).
2047 */
2048 if (sched_scan_req->n_scan_plans > 1 ||
2049 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2050 sched_scan_req)) {
2051 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2052 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2053 sched_scan_stopped = true;
2054 }
2055 mutex_unlock(&local->mtx);
2056
2057 if (sched_scan_stopped)
2058 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2059
2060 wake_up:
2061 if (local->in_reconfig) {
2062 local->in_reconfig = false;
2063 barrier();
2064
2065 /* Restart deferred ROCs */
2066 mutex_lock(&local->mtx);
2067 ieee80211_start_next_roc(local);
2068 mutex_unlock(&local->mtx);
2069 }
2070
2071 if (local->monitors == local->open_count && local->monitors > 0)
2072 ieee80211_add_virtual_monitor(local);
2073
2074 /*
2075 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2076 * sessions can be established after a resume.
2077 *
2078 * Also tear down aggregation sessions since reconfiguring
2079 * them in a hardware restart scenario is not easily done
2080 * right now, and the hardware will have lost information
2081 * about the sessions, but we and the AP still think they
2082 * are active. This is really a workaround though.
2083 */
2084 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2085 mutex_lock(&local->sta_mtx);
2086
2087 list_for_each_entry(sta, &local->sta_list, list) {
2088 if (!local->resuming)
2089 ieee80211_sta_tear_down_BA_sessions(
2090 sta, AGG_STOP_LOCAL_REQUEST);
2091 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2092 }
2093
2094 mutex_unlock(&local->sta_mtx);
2095 }
2096
2097 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2098 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2099 false);
2100
2101 /*
2102 * If this is for hw restart things are still running.
2103 * We may want to change that later, however.
2104 */
2105 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2106 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2107
2108 if (!suspended)
2109 return 0;
2110
2111 #ifdef CONFIG_PM
2112 /* first set suspended false, then resuming */
2113 local->suspended = false;
2114 mb();
2115 local->resuming = false;
2116
2117 ieee80211_flush_completed_scan(local, false);
2118
2119 if (local->open_count && !reconfig_due_to_wowlan)
2120 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2121
2122 list_for_each_entry(sdata, &local->interfaces, list) {
2123 if (!ieee80211_sdata_running(sdata))
2124 continue;
2125 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2126 ieee80211_sta_restart(sdata);
2127 }
2128
2129 mod_timer(&local->sta_cleanup, jiffies + 1);
2130 #else
2131 WARN_ON(1);
2132 #endif
2133
2134 return 0;
2135 }
2136
2137 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2138 {
2139 struct ieee80211_sub_if_data *sdata;
2140 struct ieee80211_local *local;
2141 struct ieee80211_key *key;
2142
2143 if (WARN_ON(!vif))
2144 return;
2145
2146 sdata = vif_to_sdata(vif);
2147 local = sdata->local;
2148
2149 if (WARN_ON(!local->resuming))
2150 return;
2151
2152 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2153 return;
2154
2155 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2156
2157 mutex_lock(&local->key_mtx);
2158 list_for_each_entry(key, &sdata->key_list, list)
2159 key->flags |= KEY_FLAG_TAINTED;
2160 mutex_unlock(&local->key_mtx);
2161 }
2162 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2163
2164 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2165 {
2166 struct ieee80211_local *local = sdata->local;
2167 struct ieee80211_chanctx_conf *chanctx_conf;
2168 struct ieee80211_chanctx *chanctx;
2169
2170 mutex_lock(&local->chanctx_mtx);
2171
2172 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2173 lockdep_is_held(&local->chanctx_mtx));
2174
2175 /*
2176 * This function can be called from a work, thus it may be possible
2177 * that the chanctx_conf is removed (due to a disconnection, for
2178 * example).
2179 * So nothing should be done in such case.
2180 */
2181 if (!chanctx_conf)
2182 goto unlock;
2183
2184 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2185 ieee80211_recalc_smps_chanctx(local, chanctx);
2186 unlock:
2187 mutex_unlock(&local->chanctx_mtx);
2188 }
2189
2190 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2191 {
2192 struct ieee80211_local *local = sdata->local;
2193 struct ieee80211_chanctx_conf *chanctx_conf;
2194 struct ieee80211_chanctx *chanctx;
2195
2196 mutex_lock(&local->chanctx_mtx);
2197
2198 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2199 lockdep_is_held(&local->chanctx_mtx));
2200
2201 if (WARN_ON_ONCE(!chanctx_conf))
2202 goto unlock;
2203
2204 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2205 ieee80211_recalc_chanctx_min_def(local, chanctx);
2206 unlock:
2207 mutex_unlock(&local->chanctx_mtx);
2208 }
2209
2210 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2211 {
2212 size_t pos = offset;
2213
2214 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2215 pos += 2 + ies[pos + 1];
2216
2217 return pos;
2218 }
2219
2220 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2221 int rssi_min_thold,
2222 int rssi_max_thold)
2223 {
2224 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2225
2226 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2227 return;
2228
2229 /*
2230 * Scale up threshold values before storing it, as the RSSI averaging
2231 * algorithm uses a scaled up value as well. Change this scaling
2232 * factor if the RSSI averaging algorithm changes.
2233 */
2234 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2235 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2236 }
2237
2238 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2239 int rssi_min_thold,
2240 int rssi_max_thold)
2241 {
2242 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2243
2244 WARN_ON(rssi_min_thold == rssi_max_thold ||
2245 rssi_min_thold > rssi_max_thold);
2246
2247 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2248 rssi_max_thold);
2249 }
2250 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2251
2252 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2253 {
2254 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2255
2256 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2257 }
2258 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2259
2260 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2261 u16 cap)
2262 {
2263 __le16 tmp;
2264
2265 *pos++ = WLAN_EID_HT_CAPABILITY;
2266 *pos++ = sizeof(struct ieee80211_ht_cap);
2267 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2268
2269 /* capability flags */
2270 tmp = cpu_to_le16(cap);
2271 memcpy(pos, &tmp, sizeof(u16));
2272 pos += sizeof(u16);
2273
2274 /* AMPDU parameters */
2275 *pos++ = ht_cap->ampdu_factor |
2276 (ht_cap->ampdu_density <<
2277 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2278
2279 /* MCS set */
2280 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2281 pos += sizeof(ht_cap->mcs);
2282
2283 /* extended capabilities */
2284 pos += sizeof(__le16);
2285
2286 /* BF capabilities */
2287 pos += sizeof(__le32);
2288
2289 /* antenna selection */
2290 pos += sizeof(u8);
2291
2292 return pos;
2293 }
2294
2295 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2296 u32 cap)
2297 {
2298 __le32 tmp;
2299
2300 *pos++ = WLAN_EID_VHT_CAPABILITY;
2301 *pos++ = sizeof(struct ieee80211_vht_cap);
2302 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2303
2304 /* capability flags */
2305 tmp = cpu_to_le32(cap);
2306 memcpy(pos, &tmp, sizeof(u32));
2307 pos += sizeof(u32);
2308
2309 /* VHT MCS set */
2310 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2311 pos += sizeof(vht_cap->vht_mcs);
2312
2313 return pos;
2314 }
2315
2316 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2317 const struct cfg80211_chan_def *chandef,
2318 u16 prot_mode, bool rifs_mode)
2319 {
2320 struct ieee80211_ht_operation *ht_oper;
2321 /* Build HT Information */
2322 *pos++ = WLAN_EID_HT_OPERATION;
2323 *pos++ = sizeof(struct ieee80211_ht_operation);
2324 ht_oper = (struct ieee80211_ht_operation *)pos;
2325 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2326 chandef->chan->center_freq);
2327 switch (chandef->width) {
2328 case NL80211_CHAN_WIDTH_160:
2329 case NL80211_CHAN_WIDTH_80P80:
2330 case NL80211_CHAN_WIDTH_80:
2331 case NL80211_CHAN_WIDTH_40:
2332 if (chandef->center_freq1 > chandef->chan->center_freq)
2333 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2334 else
2335 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2336 break;
2337 default:
2338 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2339 break;
2340 }
2341 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2342 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2343 chandef->width != NL80211_CHAN_WIDTH_20)
2344 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2345
2346 if (rifs_mode)
2347 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2348
2349 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2350 ht_oper->stbc_param = 0x0000;
2351
2352 /* It seems that Basic MCS set and Supported MCS set
2353 are identical for the first 10 bytes */
2354 memset(&ht_oper->basic_set, 0, 16);
2355 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2356
2357 return pos + sizeof(struct ieee80211_ht_operation);
2358 }
2359
2360 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2361 const struct cfg80211_chan_def *chandef)
2362 {
2363 struct ieee80211_vht_operation *vht_oper;
2364
2365 *pos++ = WLAN_EID_VHT_OPERATION;
2366 *pos++ = sizeof(struct ieee80211_vht_operation);
2367 vht_oper = (struct ieee80211_vht_operation *)pos;
2368 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2369 chandef->center_freq1);
2370 if (chandef->center_freq2)
2371 vht_oper->center_freq_seg2_idx =
2372 ieee80211_frequency_to_channel(chandef->center_freq2);
2373 else
2374 vht_oper->center_freq_seg2_idx = 0x00;
2375
2376 switch (chandef->width) {
2377 case NL80211_CHAN_WIDTH_160:
2378 /*
2379 * Convert 160 MHz channel width to new style as interop
2380 * workaround.
2381 */
2382 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2383 vht_oper->center_freq_seg2_idx = vht_oper->center_freq_seg1_idx;
2384 if (chandef->chan->center_freq < chandef->center_freq1)
2385 vht_oper->center_freq_seg1_idx -= 8;
2386 else
2387 vht_oper->center_freq_seg1_idx += 8;
2388 break;
2389 case NL80211_CHAN_WIDTH_80P80:
2390 /*
2391 * Convert 80+80 MHz channel width to new style as interop
2392 * workaround.
2393 */
2394 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2395 break;
2396 case NL80211_CHAN_WIDTH_80:
2397 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2398 break;
2399 default:
2400 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2401 break;
2402 }
2403
2404 /* don't require special VHT peer rates */
2405 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2406
2407 return pos + sizeof(struct ieee80211_vht_operation);
2408 }
2409
2410 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2411 struct cfg80211_chan_def *chandef)
2412 {
2413 enum nl80211_channel_type channel_type;
2414
2415 if (!ht_oper)
2416 return false;
2417
2418 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2419 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2420 channel_type = NL80211_CHAN_HT20;
2421 break;
2422 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2423 channel_type = NL80211_CHAN_HT40PLUS;
2424 break;
2425 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2426 channel_type = NL80211_CHAN_HT40MINUS;
2427 break;
2428 default:
2429 channel_type = NL80211_CHAN_NO_HT;
2430 return false;
2431 }
2432
2433 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2434 return true;
2435 }
2436
2437 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2438 struct cfg80211_chan_def *chandef)
2439 {
2440 struct cfg80211_chan_def new = *chandef;
2441 int cf1, cf2;
2442
2443 if (!oper)
2444 return false;
2445
2446 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2447 chandef->chan->band);
2448 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2449 chandef->chan->band);
2450
2451 switch (oper->chan_width) {
2452 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2453 break;
2454 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2455 new.width = NL80211_CHAN_WIDTH_80;
2456 new.center_freq1 = cf1;
2457 /* If needed, adjust based on the newer interop workaround. */
2458 if (oper->center_freq_seg2_idx) {
2459 unsigned int diff;
2460
2461 diff = abs(oper->center_freq_seg2_idx -
2462 oper->center_freq_seg1_idx);
2463 if (diff == 8) {
2464 new.width = NL80211_CHAN_WIDTH_160;
2465 new.center_freq1 = cf2;
2466 } else if (diff > 8) {
2467 new.width = NL80211_CHAN_WIDTH_80P80;
2468 new.center_freq2 = cf2;
2469 }
2470 }
2471 break;
2472 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2473 new.width = NL80211_CHAN_WIDTH_160;
2474 new.center_freq1 = cf1;
2475 break;
2476 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2477 new.width = NL80211_CHAN_WIDTH_80P80;
2478 new.center_freq1 = cf1;
2479 new.center_freq2 = cf2;
2480 break;
2481 default:
2482 return false;
2483 }
2484
2485 if (!cfg80211_chandef_valid(&new))
2486 return false;
2487
2488 *chandef = new;
2489 return true;
2490 }
2491
2492 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2493 const struct ieee80211_supported_band *sband,
2494 const u8 *srates, int srates_len, u32 *rates)
2495 {
2496 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2497 int shift = ieee80211_chandef_get_shift(chandef);
2498 struct ieee80211_rate *br;
2499 int brate, rate, i, j, count = 0;
2500
2501 *rates = 0;
2502
2503 for (i = 0; i < srates_len; i++) {
2504 rate = srates[i] & 0x7f;
2505
2506 for (j = 0; j < sband->n_bitrates; j++) {
2507 br = &sband->bitrates[j];
2508 if ((rate_flags & br->flags) != rate_flags)
2509 continue;
2510
2511 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2512 if (brate == rate) {
2513 *rates |= BIT(j);
2514 count++;
2515 break;
2516 }
2517 }
2518 }
2519 return count;
2520 }
2521
2522 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2523 struct sk_buff *skb, bool need_basic,
2524 enum nl80211_band band)
2525 {
2526 struct ieee80211_local *local = sdata->local;
2527 struct ieee80211_supported_band *sband;
2528 int rate, shift;
2529 u8 i, rates, *pos;
2530 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2531 u32 rate_flags;
2532
2533 shift = ieee80211_vif_get_shift(&sdata->vif);
2534 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2535 sband = local->hw.wiphy->bands[band];
2536 rates = 0;
2537 for (i = 0; i < sband->n_bitrates; i++) {
2538 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2539 continue;
2540 rates++;
2541 }
2542 if (rates > 8)
2543 rates = 8;
2544
2545 if (skb_tailroom(skb) < rates + 2)
2546 return -ENOMEM;
2547
2548 pos = skb_put(skb, rates + 2);
2549 *pos++ = WLAN_EID_SUPP_RATES;
2550 *pos++ = rates;
2551 for (i = 0; i < rates; i++) {
2552 u8 basic = 0;
2553 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2554 continue;
2555
2556 if (need_basic && basic_rates & BIT(i))
2557 basic = 0x80;
2558 rate = sband->bitrates[i].bitrate;
2559 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2560 5 * (1 << shift));
2561 *pos++ = basic | (u8) rate;
2562 }
2563
2564 return 0;
2565 }
2566
2567 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2568 struct sk_buff *skb, bool need_basic,
2569 enum nl80211_band band)
2570 {
2571 struct ieee80211_local *local = sdata->local;
2572 struct ieee80211_supported_band *sband;
2573 int rate, shift;
2574 u8 i, exrates, *pos;
2575 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2576 u32 rate_flags;
2577
2578 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2579 shift = ieee80211_vif_get_shift(&sdata->vif);
2580
2581 sband = local->hw.wiphy->bands[band];
2582 exrates = 0;
2583 for (i = 0; i < sband->n_bitrates; i++) {
2584 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2585 continue;
2586 exrates++;
2587 }
2588
2589 if (exrates > 8)
2590 exrates -= 8;
2591 else
2592 exrates = 0;
2593
2594 if (skb_tailroom(skb) < exrates + 2)
2595 return -ENOMEM;
2596
2597 if (exrates) {
2598 pos = skb_put(skb, exrates + 2);
2599 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2600 *pos++ = exrates;
2601 for (i = 8; i < sband->n_bitrates; i++) {
2602 u8 basic = 0;
2603 if ((rate_flags & sband->bitrates[i].flags)
2604 != rate_flags)
2605 continue;
2606 if (need_basic && basic_rates & BIT(i))
2607 basic = 0x80;
2608 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2609 5 * (1 << shift));
2610 *pos++ = basic | (u8) rate;
2611 }
2612 }
2613 return 0;
2614 }
2615
2616 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2617 {
2618 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2619 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2620
2621 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2622 /* non-managed type inferfaces */
2623 return 0;
2624 }
2625 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2626 }
2627 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2628
2629 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2630 {
2631 if (!mcs)
2632 return 1;
2633
2634 /* TODO: consider rx_highest */
2635
2636 if (mcs->rx_mask[3])
2637 return 4;
2638 if (mcs->rx_mask[2])
2639 return 3;
2640 if (mcs->rx_mask[1])
2641 return 2;
2642 return 1;
2643 }
2644
2645 /**
2646 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2647 * @local: mac80211 hw info struct
2648 * @status: RX status
2649 * @mpdu_len: total MPDU length (including FCS)
2650 * @mpdu_offset: offset into MPDU to calculate timestamp at
2651 *
2652 * This function calculates the RX timestamp at the given MPDU offset, taking
2653 * into account what the RX timestamp was. An offset of 0 will just normalize
2654 * the timestamp to TSF at beginning of MPDU reception.
2655 */
2656 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2657 struct ieee80211_rx_status *status,
2658 unsigned int mpdu_len,
2659 unsigned int mpdu_offset)
2660 {
2661 u64 ts = status->mactime;
2662 struct rate_info ri;
2663 u16 rate;
2664
2665 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2666 return 0;
2667
2668 memset(&ri, 0, sizeof(ri));
2669
2670 /* Fill cfg80211 rate info */
2671 if (status->flag & RX_FLAG_HT) {
2672 ri.mcs = status->rate_idx;
2673 ri.flags |= RATE_INFO_FLAGS_MCS;
2674 if (status->flag & RX_FLAG_40MHZ)
2675 ri.bw = RATE_INFO_BW_40;
2676 else
2677 ri.bw = RATE_INFO_BW_20;
2678 if (status->flag & RX_FLAG_SHORT_GI)
2679 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2680 } else if (status->flag & RX_FLAG_VHT) {
2681 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2682 ri.mcs = status->rate_idx;
2683 ri.nss = status->vht_nss;
2684 if (status->flag & RX_FLAG_40MHZ)
2685 ri.bw = RATE_INFO_BW_40;
2686 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2687 ri.bw = RATE_INFO_BW_80;
2688 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2689 ri.bw = RATE_INFO_BW_160;
2690 else
2691 ri.bw = RATE_INFO_BW_20;
2692 if (status->flag & RX_FLAG_SHORT_GI)
2693 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2694 } else {
2695 struct ieee80211_supported_band *sband;
2696 int shift = 0;
2697 int bitrate;
2698
2699 if (status->flag & RX_FLAG_10MHZ) {
2700 shift = 1;
2701 ri.bw = RATE_INFO_BW_10;
2702 } else if (status->flag & RX_FLAG_5MHZ) {
2703 shift = 2;
2704 ri.bw = RATE_INFO_BW_5;
2705 } else {
2706 ri.bw = RATE_INFO_BW_20;
2707 }
2708
2709 sband = local->hw.wiphy->bands[status->band];
2710 bitrate = sband->bitrates[status->rate_idx].bitrate;
2711 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2712
2713 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2714 /* TODO: handle HT/VHT preambles */
2715 if (status->band == NL80211_BAND_5GHZ) {
2716 ts += 20 << shift;
2717 mpdu_offset += 2;
2718 } else if (status->flag & RX_FLAG_SHORTPRE) {
2719 ts += 96;
2720 } else {
2721 ts += 192;
2722 }
2723 }
2724 }
2725
2726 rate = cfg80211_calculate_bitrate(&ri);
2727 if (WARN_ONCE(!rate,
2728 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2729 (unsigned long long)status->flag, status->rate_idx,
2730 status->vht_nss))
2731 return 0;
2732
2733 /* rewind from end of MPDU */
2734 if (status->flag & RX_FLAG_MACTIME_END)
2735 ts -= mpdu_len * 8 * 10 / rate;
2736
2737 ts += mpdu_offset * 8 * 10 / rate;
2738
2739 return ts;
2740 }
2741
2742 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2743 {
2744 struct ieee80211_sub_if_data *sdata;
2745 struct cfg80211_chan_def chandef;
2746
2747 mutex_lock(&local->mtx);
2748 mutex_lock(&local->iflist_mtx);
2749 list_for_each_entry(sdata, &local->interfaces, list) {
2750 /* it might be waiting for the local->mtx, but then
2751 * by the time it gets it, sdata->wdev.cac_started
2752 * will no longer be true
2753 */
2754 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2755
2756 if (sdata->wdev.cac_started) {
2757 chandef = sdata->vif.bss_conf.chandef;
2758 ieee80211_vif_release_channel(sdata);
2759 cfg80211_cac_event(sdata->dev,
2760 &chandef,
2761 NL80211_RADAR_CAC_ABORTED,
2762 GFP_KERNEL);
2763 }
2764 }
2765 mutex_unlock(&local->iflist_mtx);
2766 mutex_unlock(&local->mtx);
2767 }
2768
2769 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2770 {
2771 struct ieee80211_local *local =
2772 container_of(work, struct ieee80211_local, radar_detected_work);
2773 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2774 struct ieee80211_chanctx *ctx;
2775 int num_chanctx = 0;
2776
2777 mutex_lock(&local->chanctx_mtx);
2778 list_for_each_entry(ctx, &local->chanctx_list, list) {
2779 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2780 continue;
2781
2782 num_chanctx++;
2783 chandef = ctx->conf.def;
2784 }
2785 mutex_unlock(&local->chanctx_mtx);
2786
2787 ieee80211_dfs_cac_cancel(local);
2788
2789 if (num_chanctx > 1)
2790 /* XXX: multi-channel is not supported yet */
2791 WARN_ON(1);
2792 else
2793 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2794 }
2795
2796 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2797 {
2798 struct ieee80211_local *local = hw_to_local(hw);
2799
2800 trace_api_radar_detected(local);
2801
2802 ieee80211_queue_work(hw, &local->radar_detected_work);
2803 }
2804 EXPORT_SYMBOL(ieee80211_radar_detected);
2805
2806 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2807 {
2808 u32 ret;
2809 int tmp;
2810
2811 switch (c->width) {
2812 case NL80211_CHAN_WIDTH_20:
2813 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2814 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2815 break;
2816 case NL80211_CHAN_WIDTH_40:
2817 c->width = NL80211_CHAN_WIDTH_20;
2818 c->center_freq1 = c->chan->center_freq;
2819 ret = IEEE80211_STA_DISABLE_40MHZ |
2820 IEEE80211_STA_DISABLE_VHT;
2821 break;
2822 case NL80211_CHAN_WIDTH_80:
2823 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2824 /* n_P40 */
2825 tmp /= 2;
2826 /* freq_P40 */
2827 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2828 c->width = NL80211_CHAN_WIDTH_40;
2829 ret = IEEE80211_STA_DISABLE_VHT;
2830 break;
2831 case NL80211_CHAN_WIDTH_80P80:
2832 c->center_freq2 = 0;
2833 c->width = NL80211_CHAN_WIDTH_80;
2834 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2835 IEEE80211_STA_DISABLE_160MHZ;
2836 break;
2837 case NL80211_CHAN_WIDTH_160:
2838 /* n_P20 */
2839 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2840 /* n_P80 */
2841 tmp /= 4;
2842 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2843 c->width = NL80211_CHAN_WIDTH_80;
2844 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2845 IEEE80211_STA_DISABLE_160MHZ;
2846 break;
2847 default:
2848 case NL80211_CHAN_WIDTH_20_NOHT:
2849 WARN_ON_ONCE(1);
2850 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2851 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2852 break;
2853 case NL80211_CHAN_WIDTH_5:
2854 case NL80211_CHAN_WIDTH_10:
2855 WARN_ON_ONCE(1);
2856 /* keep c->width */
2857 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2858 break;
2859 }
2860
2861 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2862
2863 return ret;
2864 }
2865
2866 /*
2867 * Returns true if smps_mode_new is strictly more restrictive than
2868 * smps_mode_old.
2869 */
2870 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2871 enum ieee80211_smps_mode smps_mode_new)
2872 {
2873 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2874 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2875 return false;
2876
2877 switch (smps_mode_old) {
2878 case IEEE80211_SMPS_STATIC:
2879 return false;
2880 case IEEE80211_SMPS_DYNAMIC:
2881 return smps_mode_new == IEEE80211_SMPS_STATIC;
2882 case IEEE80211_SMPS_OFF:
2883 return smps_mode_new != IEEE80211_SMPS_OFF;
2884 default:
2885 WARN_ON(1);
2886 }
2887
2888 return false;
2889 }
2890
2891 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2892 struct cfg80211_csa_settings *csa_settings)
2893 {
2894 struct sk_buff *skb;
2895 struct ieee80211_mgmt *mgmt;
2896 struct ieee80211_local *local = sdata->local;
2897 int freq;
2898 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2899 sizeof(mgmt->u.action.u.chan_switch);
2900 u8 *pos;
2901
2902 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2903 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2904 return -EOPNOTSUPP;
2905
2906 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2907 5 + /* channel switch announcement element */
2908 3 + /* secondary channel offset element */
2909 8); /* mesh channel switch parameters element */
2910 if (!skb)
2911 return -ENOMEM;
2912
2913 skb_reserve(skb, local->tx_headroom);
2914 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2915 memset(mgmt, 0, hdr_len);
2916 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2917 IEEE80211_STYPE_ACTION);
2918
2919 eth_broadcast_addr(mgmt->da);
2920 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2921 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2922 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2923 } else {
2924 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2925 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2926 }
2927 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2928 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2929 pos = skb_put(skb, 5);
2930 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2931 *pos++ = 3; /* IE length */
2932 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2933 freq = csa_settings->chandef.chan->center_freq;
2934 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2935 *pos++ = csa_settings->count; /* count */
2936
2937 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2938 enum nl80211_channel_type ch_type;
2939
2940 skb_put(skb, 3);
2941 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2942 *pos++ = 1; /* IE length */
2943 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2944 if (ch_type == NL80211_CHAN_HT40PLUS)
2945 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2946 else
2947 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2948 }
2949
2950 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2951 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2952
2953 skb_put(skb, 8);
2954 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2955 *pos++ = 6; /* IE length */
2956 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2957 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2958 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2959 *pos++ |= csa_settings->block_tx ?
2960 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2961 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2962 pos += 2;
2963 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2964 pos += 2;
2965 }
2966
2967 ieee80211_tx_skb(sdata, skb);
2968 return 0;
2969 }
2970
2971 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2972 {
2973 return !(cs == NULL || cs->cipher == 0 ||
2974 cs->hdr_len < cs->pn_len + cs->pn_off ||
2975 cs->hdr_len <= cs->key_idx_off ||
2976 cs->key_idx_shift > 7 ||
2977 cs->key_idx_mask == 0);
2978 }
2979
2980 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2981 {
2982 int i;
2983
2984 /* Ensure we have enough iftype bitmap space for all iftype values */
2985 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2986
2987 for (i = 0; i < n; i++)
2988 if (!ieee80211_cs_valid(&cs[i]))
2989 return false;
2990
2991 return true;
2992 }
2993
2994 const struct ieee80211_cipher_scheme *
2995 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2996 enum nl80211_iftype iftype)
2997 {
2998 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2999 int n = local->hw.n_cipher_schemes;
3000 int i;
3001 const struct ieee80211_cipher_scheme *cs = NULL;
3002
3003 for (i = 0; i < n; i++) {
3004 if (l[i].cipher == cipher) {
3005 cs = &l[i];
3006 break;
3007 }
3008 }
3009
3010 if (!cs || !(cs->iftype & BIT(iftype)))
3011 return NULL;
3012
3013 return cs;
3014 }
3015
3016 int ieee80211_cs_headroom(struct ieee80211_local *local,
3017 struct cfg80211_crypto_settings *crypto,
3018 enum nl80211_iftype iftype)
3019 {
3020 const struct ieee80211_cipher_scheme *cs;
3021 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3022 int i;
3023
3024 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3025 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3026 iftype);
3027
3028 if (cs && headroom < cs->hdr_len)
3029 headroom = cs->hdr_len;
3030 }
3031
3032 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3033 if (cs && headroom < cs->hdr_len)
3034 headroom = cs->hdr_len;
3035
3036 return headroom;
3037 }
3038
3039 static bool
3040 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3041 {
3042 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3043 int skip;
3044
3045 if (end > 0)
3046 return false;
3047
3048 /* One shot NOA */
3049 if (data->count[i] == 1)
3050 return false;
3051
3052 if (data->desc[i].interval == 0)
3053 return false;
3054
3055 /* End time is in the past, check for repetitions */
3056 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3057 if (data->count[i] < 255) {
3058 if (data->count[i] <= skip) {
3059 data->count[i] = 0;
3060 return false;
3061 }
3062
3063 data->count[i] -= skip;
3064 }
3065
3066 data->desc[i].start += skip * data->desc[i].interval;
3067
3068 return true;
3069 }
3070
3071 static bool
3072 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3073 s32 *offset)
3074 {
3075 bool ret = false;
3076 int i;
3077
3078 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3079 s32 cur;
3080
3081 if (!data->count[i])
3082 continue;
3083
3084 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3085 ret = true;
3086
3087 cur = data->desc[i].start - tsf;
3088 if (cur > *offset)
3089 continue;
3090
3091 cur = data->desc[i].start + data->desc[i].duration - tsf;
3092 if (cur > *offset)
3093 *offset = cur;
3094 }
3095
3096 return ret;
3097 }
3098
3099 static u32
3100 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3101 {
3102 s32 offset = 0;
3103 int tries = 0;
3104 /*
3105 * arbitrary limit, used to avoid infinite loops when combined NoA
3106 * descriptors cover the full time period.
3107 */
3108 int max_tries = 5;
3109
3110 ieee80211_extend_absent_time(data, tsf, &offset);
3111 do {
3112 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3113 break;
3114
3115 tries++;
3116 } while (tries < max_tries);
3117
3118 return offset;
3119 }
3120
3121 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3122 {
3123 u32 next_offset = BIT(31) - 1;
3124 int i;
3125
3126 data->absent = 0;
3127 data->has_next_tsf = false;
3128 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3129 s32 start;
3130
3131 if (!data->count[i])
3132 continue;
3133
3134 ieee80211_extend_noa_desc(data, tsf, i);
3135 start = data->desc[i].start - tsf;
3136 if (start <= 0)
3137 data->absent |= BIT(i);
3138
3139 if (next_offset > start)
3140 next_offset = start;
3141
3142 data->has_next_tsf = true;
3143 }
3144
3145 if (data->absent)
3146 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3147
3148 data->next_tsf = tsf + next_offset;
3149 }
3150 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3151
3152 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3153 struct ieee80211_noa_data *data, u32 tsf)
3154 {
3155 int ret = 0;
3156 int i;
3157
3158 memset(data, 0, sizeof(*data));
3159
3160 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3161 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3162
3163 if (!desc->count || !desc->duration)
3164 continue;
3165
3166 data->count[i] = desc->count;
3167 data->desc[i].start = le32_to_cpu(desc->start_time);
3168 data->desc[i].duration = le32_to_cpu(desc->duration);
3169 data->desc[i].interval = le32_to_cpu(desc->interval);
3170
3171 if (data->count[i] > 1 &&
3172 data->desc[i].interval < data->desc[i].duration)
3173 continue;
3174
3175 ieee80211_extend_noa_desc(data, tsf, i);
3176 ret++;
3177 }
3178
3179 if (ret)
3180 ieee80211_update_p2p_noa(data, tsf);
3181
3182 return ret;
3183 }
3184 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3185
3186 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3187 struct ieee80211_sub_if_data *sdata)
3188 {
3189 u64 tsf = drv_get_tsf(local, sdata);
3190 u64 dtim_count = 0;
3191 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3192 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3193 struct ps_data *ps;
3194 u8 bcns_from_dtim;
3195
3196 if (tsf == -1ULL || !beacon_int || !dtim_period)
3197 return;
3198
3199 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3200 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3201 if (!sdata->bss)
3202 return;
3203
3204 ps = &sdata->bss->ps;
3205 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3206 ps = &sdata->u.mesh.ps;
3207 } else {
3208 return;
3209 }
3210
3211 /*
3212 * actually finds last dtim_count, mac80211 will update in
3213 * __beacon_add_tim().
3214 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3215 */
3216 do_div(tsf, beacon_int);
3217 bcns_from_dtim = do_div(tsf, dtim_period);
3218 /* just had a DTIM */
3219 if (!bcns_from_dtim)
3220 dtim_count = 0;
3221 else
3222 dtim_count = dtim_period - bcns_from_dtim;
3223
3224 ps->dtim_count = dtim_count;
3225 }
3226
3227 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3228 struct ieee80211_chanctx *ctx)
3229 {
3230 struct ieee80211_sub_if_data *sdata;
3231 u8 radar_detect = 0;
3232
3233 lockdep_assert_held(&local->chanctx_mtx);
3234
3235 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3236 return 0;
3237
3238 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3239 if (sdata->reserved_radar_required)
3240 radar_detect |= BIT(sdata->reserved_chandef.width);
3241
3242 /*
3243 * An in-place reservation context should not have any assigned vifs
3244 * until it replaces the other context.
3245 */
3246 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3247 !list_empty(&ctx->assigned_vifs));
3248
3249 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3250 if (sdata->radar_required)
3251 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3252
3253 return radar_detect;
3254 }
3255
3256 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3257 const struct cfg80211_chan_def *chandef,
3258 enum ieee80211_chanctx_mode chanmode,
3259 u8 radar_detect)
3260 {
3261 struct ieee80211_local *local = sdata->local;
3262 struct ieee80211_sub_if_data *sdata_iter;
3263 enum nl80211_iftype iftype = sdata->wdev.iftype;
3264 int num[NUM_NL80211_IFTYPES];
3265 struct ieee80211_chanctx *ctx;
3266 int num_different_channels = 0;
3267 int total = 1;
3268
3269 lockdep_assert_held(&local->chanctx_mtx);
3270
3271 if (WARN_ON(hweight32(radar_detect) > 1))
3272 return -EINVAL;
3273
3274 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3275 !chandef->chan))
3276 return -EINVAL;
3277
3278 if (chandef)
3279 num_different_channels = 1;
3280
3281 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3282 return -EINVAL;
3283
3284 /* Always allow software iftypes */
3285 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3286 if (radar_detect)
3287 return -EINVAL;
3288 return 0;
3289 }
3290
3291 memset(num, 0, sizeof(num));
3292
3293 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3294 num[iftype] = 1;
3295
3296 list_for_each_entry(ctx, &local->chanctx_list, list) {
3297 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3298 continue;
3299 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3300 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3301 num_different_channels++;
3302 continue;
3303 }
3304 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3305 cfg80211_chandef_compatible(chandef,
3306 &ctx->conf.def))
3307 continue;
3308 num_different_channels++;
3309 }
3310
3311 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3312 struct wireless_dev *wdev_iter;
3313
3314 wdev_iter = &sdata_iter->wdev;
3315
3316 if (sdata_iter == sdata ||
3317 !ieee80211_sdata_running(sdata_iter) ||
3318 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3319 continue;
3320
3321 num[wdev_iter->iftype]++;
3322 total++;
3323 }
3324
3325 if (total == 1 && !radar_detect)
3326 return 0;
3327
3328 return cfg80211_check_combinations(local->hw.wiphy,
3329 num_different_channels,
3330 radar_detect, num);
3331 }
3332
3333 static void
3334 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3335 void *data)
3336 {
3337 u32 *max_num_different_channels = data;
3338
3339 *max_num_different_channels = max(*max_num_different_channels,
3340 c->num_different_channels);
3341 }
3342
3343 int ieee80211_max_num_channels(struct ieee80211_local *local)
3344 {
3345 struct ieee80211_sub_if_data *sdata;
3346 int num[NUM_NL80211_IFTYPES] = {};
3347 struct ieee80211_chanctx *ctx;
3348 int num_different_channels = 0;
3349 u8 radar_detect = 0;
3350 u32 max_num_different_channels = 1;
3351 int err;
3352
3353 lockdep_assert_held(&local->chanctx_mtx);
3354
3355 list_for_each_entry(ctx, &local->chanctx_list, list) {
3356 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3357 continue;
3358
3359 num_different_channels++;
3360
3361 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3362 }
3363
3364 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3365 num[sdata->wdev.iftype]++;
3366
3367 err = cfg80211_iter_combinations(local->hw.wiphy,
3368 num_different_channels, radar_detect,
3369 num, ieee80211_iter_max_chans,
3370 &max_num_different_channels);
3371 if (err < 0)
3372 return err;
3373
3374 return max_num_different_channels;
3375 }
3376
3377 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3378 {
3379 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3380 *buf++ = 7; /* len */
3381 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3382 *buf++ = 0x50;
3383 *buf++ = 0xf2;
3384 *buf++ = 2; /* WME */
3385 *buf++ = 0; /* WME info */
3386 *buf++ = 1; /* WME ver */
3387 *buf++ = qosinfo; /* U-APSD no in use */
3388
3389 return buf;
3390 }
3391
3392 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3393 unsigned long *frame_cnt,
3394 unsigned long *byte_cnt)
3395 {
3396 struct txq_info *txqi = to_txq_info(txq);
3397
3398 if (frame_cnt)
3399 *frame_cnt = txqi->tin.backlog_packets;
3400
3401 if (byte_cnt)
3402 *byte_cnt = txqi->tin.backlog_bytes;
3403 }
3404 EXPORT_SYMBOL(ieee80211_txq_get_depth);
Linux kernel - Deliverables
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