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i2c: rcar: init new messages in irq
[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 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15 #include <net/mac80211.h>
16 #include <linux/netdevice.h>
17 #include <linux/export.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_arp.h>
23 #include <linux/bitmap.h>
24 #include <linux/crc32.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/rtnetlink.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wme.h"
34 #include "led.h"
35 #include "wep.h"
36
37 /* privid for wiphys to determine whether they belong to us or not */
38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39
40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 {
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47 }
48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
49
50 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
51 {
52 struct sk_buff *skb;
53 struct ieee80211_hdr *hdr;
54
55 skb_queue_walk(&tx->skbs, skb) {
56 hdr = (struct ieee80211_hdr *) skb->data;
57 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
58 }
59 }
60
61 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
62 int rate, int erp, int short_preamble,
63 int shift)
64 {
65 int dur;
66
67 /* calculate duration (in microseconds, rounded up to next higher
68 * integer if it includes a fractional microsecond) to send frame of
69 * len bytes (does not include FCS) at the given rate. Duration will
70 * also include SIFS.
71 *
72 * rate is in 100 kbps, so divident is multiplied by 10 in the
73 * DIV_ROUND_UP() operations.
74 *
75 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
76 * is assumed to be 0 otherwise.
77 */
78
79 if (band == IEEE80211_BAND_5GHZ || erp) {
80 /*
81 * OFDM:
82 *
83 * N_DBPS = DATARATE x 4
84 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
85 * (16 = SIGNAL time, 6 = tail bits)
86 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
87 *
88 * T_SYM = 4 usec
89 * 802.11a - 18.5.2: aSIFSTime = 16 usec
90 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
91 * signal ext = 6 usec
92 */
93 dur = 16; /* SIFS + signal ext */
94 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
95 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
96
97 /* IEEE 802.11-2012 18.3.2.4: all values above are:
98 * * times 4 for 5 MHz
99 * * times 2 for 10 MHz
100 */
101 dur *= 1 << shift;
102
103 /* rates should already consider the channel bandwidth,
104 * don't apply divisor again.
105 */
106 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
107 4 * rate); /* T_SYM x N_SYM */
108 } else {
109 /*
110 * 802.11b or 802.11g with 802.11b compatibility:
111 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
112 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
113 *
114 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
115 * aSIFSTime = 10 usec
116 * aPreambleLength = 144 usec or 72 usec with short preamble
117 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
118 */
119 dur = 10; /* aSIFSTime = 10 usec */
120 dur += short_preamble ? (72 + 24) : (144 + 48);
121
122 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
123 }
124
125 return dur;
126 }
127
128 /* Exported duration function for driver use */
129 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
130 struct ieee80211_vif *vif,
131 enum ieee80211_band band,
132 size_t frame_len,
133 struct ieee80211_rate *rate)
134 {
135 struct ieee80211_sub_if_data *sdata;
136 u16 dur;
137 int erp, shift = 0;
138 bool short_preamble = false;
139
140 erp = 0;
141 if (vif) {
142 sdata = vif_to_sdata(vif);
143 short_preamble = sdata->vif.bss_conf.use_short_preamble;
144 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
145 erp = rate->flags & IEEE80211_RATE_ERP_G;
146 shift = ieee80211_vif_get_shift(vif);
147 }
148
149 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
150 short_preamble, shift);
151
152 return cpu_to_le16(dur);
153 }
154 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
155
156 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
157 struct ieee80211_vif *vif, size_t frame_len,
158 const struct ieee80211_tx_info *frame_txctl)
159 {
160 struct ieee80211_local *local = hw_to_local(hw);
161 struct ieee80211_rate *rate;
162 struct ieee80211_sub_if_data *sdata;
163 bool short_preamble;
164 int erp, shift = 0, bitrate;
165 u16 dur;
166 struct ieee80211_supported_band *sband;
167
168 sband = local->hw.wiphy->bands[frame_txctl->band];
169
170 short_preamble = false;
171
172 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
173
174 erp = 0;
175 if (vif) {
176 sdata = vif_to_sdata(vif);
177 short_preamble = sdata->vif.bss_conf.use_short_preamble;
178 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179 erp = rate->flags & IEEE80211_RATE_ERP_G;
180 shift = ieee80211_vif_get_shift(vif);
181 }
182
183 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
184
185 /* CTS duration */
186 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
187 erp, short_preamble, shift);
188 /* Data frame duration */
189 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
190 erp, short_preamble, shift);
191 /* ACK duration */
192 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
193 erp, short_preamble, shift);
194
195 return cpu_to_le16(dur);
196 }
197 EXPORT_SYMBOL(ieee80211_rts_duration);
198
199 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
200 struct ieee80211_vif *vif,
201 size_t frame_len,
202 const struct ieee80211_tx_info *frame_txctl)
203 {
204 struct ieee80211_local *local = hw_to_local(hw);
205 struct ieee80211_rate *rate;
206 struct ieee80211_sub_if_data *sdata;
207 bool short_preamble;
208 int erp, shift = 0, bitrate;
209 u16 dur;
210 struct ieee80211_supported_band *sband;
211
212 sband = local->hw.wiphy->bands[frame_txctl->band];
213
214 short_preamble = false;
215
216 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
217 erp = 0;
218 if (vif) {
219 sdata = vif_to_sdata(vif);
220 short_preamble = sdata->vif.bss_conf.use_short_preamble;
221 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
222 erp = rate->flags & IEEE80211_RATE_ERP_G;
223 shift = ieee80211_vif_get_shift(vif);
224 }
225
226 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
227
228 /* Data frame duration */
229 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
230 erp, short_preamble, shift);
231 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
232 /* ACK duration */
233 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
234 erp, short_preamble, shift);
235 }
236
237 return cpu_to_le16(dur);
238 }
239 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
240
241 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
242 {
243 struct ieee80211_sub_if_data *sdata;
244 int n_acs = IEEE80211_NUM_ACS;
245
246 if (local->hw.queues < IEEE80211_NUM_ACS)
247 n_acs = 1;
248
249 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
250 int ac;
251
252 if (!sdata->dev)
253 continue;
254
255 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
256 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
257 continue;
258
259 for (ac = 0; ac < n_acs; ac++) {
260 int ac_queue = sdata->vif.hw_queue[ac];
261
262 if (local->ops->wake_tx_queue &&
263 (atomic_read(&sdata->txqs_len[ac]) >
264 local->hw.txq_ac_max_pending))
265 continue;
266
267 if (ac_queue == queue ||
268 (sdata->vif.cab_queue == queue &&
269 local->queue_stop_reasons[ac_queue] == 0 &&
270 skb_queue_empty(&local->pending[ac_queue])))
271 netif_wake_subqueue(sdata->dev, ac);
272 }
273 }
274 }
275
276 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
277 enum queue_stop_reason reason,
278 bool refcounted)
279 {
280 struct ieee80211_local *local = hw_to_local(hw);
281
282 trace_wake_queue(local, queue, reason);
283
284 if (WARN_ON(queue >= hw->queues))
285 return;
286
287 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
288 return;
289
290 if (!refcounted)
291 local->q_stop_reasons[queue][reason] = 0;
292 else
293 local->q_stop_reasons[queue][reason]--;
294
295 if (local->q_stop_reasons[queue][reason] == 0)
296 __clear_bit(reason, &local->queue_stop_reasons[queue]);
297
298 if (local->queue_stop_reasons[queue] != 0)
299 /* someone still has this queue stopped */
300 return;
301
302 if (skb_queue_empty(&local->pending[queue])) {
303 rcu_read_lock();
304 ieee80211_propagate_queue_wake(local, queue);
305 rcu_read_unlock();
306 } else
307 tasklet_schedule(&local->tx_pending_tasklet);
308 }
309
310 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
311 enum queue_stop_reason reason,
312 bool refcounted)
313 {
314 struct ieee80211_local *local = hw_to_local(hw);
315 unsigned long flags;
316
317 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
318 __ieee80211_wake_queue(hw, queue, reason, refcounted);
319 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
320 }
321
322 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
323 {
324 ieee80211_wake_queue_by_reason(hw, queue,
325 IEEE80211_QUEUE_STOP_REASON_DRIVER,
326 false);
327 }
328 EXPORT_SYMBOL(ieee80211_wake_queue);
329
330 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
331 enum queue_stop_reason reason,
332 bool refcounted)
333 {
334 struct ieee80211_local *local = hw_to_local(hw);
335 struct ieee80211_sub_if_data *sdata;
336 int n_acs = IEEE80211_NUM_ACS;
337
338 trace_stop_queue(local, queue, reason);
339
340 if (WARN_ON(queue >= hw->queues))
341 return;
342
343 if (!refcounted)
344 local->q_stop_reasons[queue][reason] = 1;
345 else
346 local->q_stop_reasons[queue][reason]++;
347
348 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
349 return;
350
351 if (local->hw.queues < IEEE80211_NUM_ACS)
352 n_acs = 1;
353
354 rcu_read_lock();
355 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
356 int ac;
357
358 if (!sdata->dev)
359 continue;
360
361 for (ac = 0; ac < n_acs; ac++) {
362 if (sdata->vif.hw_queue[ac] == queue ||
363 sdata->vif.cab_queue == queue)
364 netif_stop_subqueue(sdata->dev, ac);
365 }
366 }
367 rcu_read_unlock();
368 }
369
370 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
371 enum queue_stop_reason reason,
372 bool refcounted)
373 {
374 struct ieee80211_local *local = hw_to_local(hw);
375 unsigned long flags;
376
377 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
378 __ieee80211_stop_queue(hw, queue, reason, refcounted);
379 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
380 }
381
382 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
383 {
384 ieee80211_stop_queue_by_reason(hw, queue,
385 IEEE80211_QUEUE_STOP_REASON_DRIVER,
386 false);
387 }
388 EXPORT_SYMBOL(ieee80211_stop_queue);
389
390 void ieee80211_add_pending_skb(struct ieee80211_local *local,
391 struct sk_buff *skb)
392 {
393 struct ieee80211_hw *hw = &local->hw;
394 unsigned long flags;
395 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
396 int queue = info->hw_queue;
397
398 if (WARN_ON(!info->control.vif)) {
399 ieee80211_free_txskb(&local->hw, skb);
400 return;
401 }
402
403 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
404 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
405 false);
406 __skb_queue_tail(&local->pending[queue], skb);
407 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
408 false);
409 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
410 }
411
412 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
413 struct sk_buff_head *skbs)
414 {
415 struct ieee80211_hw *hw = &local->hw;
416 struct sk_buff *skb;
417 unsigned long flags;
418 int queue, i;
419
420 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
421 while ((skb = skb_dequeue(skbs))) {
422 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
423
424 if (WARN_ON(!info->control.vif)) {
425 ieee80211_free_txskb(&local->hw, skb);
426 continue;
427 }
428
429 queue = info->hw_queue;
430
431 __ieee80211_stop_queue(hw, queue,
432 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
433 false);
434
435 __skb_queue_tail(&local->pending[queue], skb);
436 }
437
438 for (i = 0; i < hw->queues; i++)
439 __ieee80211_wake_queue(hw, i,
440 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
441 false);
442 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
443 }
444
445 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
446 unsigned long queues,
447 enum queue_stop_reason reason,
448 bool refcounted)
449 {
450 struct ieee80211_local *local = hw_to_local(hw);
451 unsigned long flags;
452 int i;
453
454 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
455
456 for_each_set_bit(i, &queues, hw->queues)
457 __ieee80211_stop_queue(hw, i, reason, refcounted);
458
459 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
460 }
461
462 void ieee80211_stop_queues(struct ieee80211_hw *hw)
463 {
464 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
465 IEEE80211_QUEUE_STOP_REASON_DRIVER,
466 false);
467 }
468 EXPORT_SYMBOL(ieee80211_stop_queues);
469
470 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
471 {
472 struct ieee80211_local *local = hw_to_local(hw);
473 unsigned long flags;
474 int ret;
475
476 if (WARN_ON(queue >= hw->queues))
477 return true;
478
479 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
480 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
481 &local->queue_stop_reasons[queue]);
482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
483 return ret;
484 }
485 EXPORT_SYMBOL(ieee80211_queue_stopped);
486
487 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
488 unsigned long queues,
489 enum queue_stop_reason reason,
490 bool refcounted)
491 {
492 struct ieee80211_local *local = hw_to_local(hw);
493 unsigned long flags;
494 int i;
495
496 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
497
498 for_each_set_bit(i, &queues, hw->queues)
499 __ieee80211_wake_queue(hw, i, reason, refcounted);
500
501 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
502 }
503
504 void ieee80211_wake_queues(struct ieee80211_hw *hw)
505 {
506 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
507 IEEE80211_QUEUE_STOP_REASON_DRIVER,
508 false);
509 }
510 EXPORT_SYMBOL(ieee80211_wake_queues);
511
512 static unsigned int
513 ieee80211_get_vif_queues(struct ieee80211_local *local,
514 struct ieee80211_sub_if_data *sdata)
515 {
516 unsigned int queues;
517
518 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
519 int ac;
520
521 queues = 0;
522
523 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
524 queues |= BIT(sdata->vif.hw_queue[ac]);
525 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
526 queues |= BIT(sdata->vif.cab_queue);
527 } else {
528 /* all queues */
529 queues = BIT(local->hw.queues) - 1;
530 }
531
532 return queues;
533 }
534
535 void __ieee80211_flush_queues(struct ieee80211_local *local,
536 struct ieee80211_sub_if_data *sdata,
537 unsigned int queues, bool drop)
538 {
539 if (!local->ops->flush)
540 return;
541
542 /*
543 * If no queue was set, or if the HW doesn't support
544 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
545 */
546 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
547 queues = ieee80211_get_vif_queues(local, sdata);
548
549 ieee80211_stop_queues_by_reason(&local->hw, queues,
550 IEEE80211_QUEUE_STOP_REASON_FLUSH,
551 false);
552
553 drv_flush(local, sdata, queues, drop);
554
555 ieee80211_wake_queues_by_reason(&local->hw, queues,
556 IEEE80211_QUEUE_STOP_REASON_FLUSH,
557 false);
558 }
559
560 void ieee80211_flush_queues(struct ieee80211_local *local,
561 struct ieee80211_sub_if_data *sdata, bool drop)
562 {
563 __ieee80211_flush_queues(local, sdata, 0, drop);
564 }
565
566 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata,
568 enum queue_stop_reason reason)
569 {
570 ieee80211_stop_queues_by_reason(&local->hw,
571 ieee80211_get_vif_queues(local, sdata),
572 reason, true);
573 }
574
575 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
576 struct ieee80211_sub_if_data *sdata,
577 enum queue_stop_reason reason)
578 {
579 ieee80211_wake_queues_by_reason(&local->hw,
580 ieee80211_get_vif_queues(local, sdata),
581 reason, true);
582 }
583
584 static void __iterate_interfaces(struct ieee80211_local *local,
585 u32 iter_flags,
586 void (*iterator)(void *data, u8 *mac,
587 struct ieee80211_vif *vif),
588 void *data)
589 {
590 struct ieee80211_sub_if_data *sdata;
591 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
592
593 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
594 switch (sdata->vif.type) {
595 case NL80211_IFTYPE_MONITOR:
596 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
597 continue;
598 break;
599 case NL80211_IFTYPE_AP_VLAN:
600 continue;
601 default:
602 break;
603 }
604 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
605 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
606 continue;
607 if (ieee80211_sdata_running(sdata) || !active_only)
608 iterator(data, sdata->vif.addr,
609 &sdata->vif);
610 }
611
612 sdata = rcu_dereference_check(local->monitor_sdata,
613 lockdep_is_held(&local->iflist_mtx) ||
614 lockdep_rtnl_is_held());
615 if (sdata &&
616 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
617 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
618 iterator(data, sdata->vif.addr, &sdata->vif);
619 }
620
621 void ieee80211_iterate_interfaces(
622 struct ieee80211_hw *hw, u32 iter_flags,
623 void (*iterator)(void *data, u8 *mac,
624 struct ieee80211_vif *vif),
625 void *data)
626 {
627 struct ieee80211_local *local = hw_to_local(hw);
628
629 mutex_lock(&local->iflist_mtx);
630 __iterate_interfaces(local, iter_flags, iterator, data);
631 mutex_unlock(&local->iflist_mtx);
632 }
633 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
634
635 void ieee80211_iterate_active_interfaces_atomic(
636 struct ieee80211_hw *hw, u32 iter_flags,
637 void (*iterator)(void *data, u8 *mac,
638 struct ieee80211_vif *vif),
639 void *data)
640 {
641 struct ieee80211_local *local = hw_to_local(hw);
642
643 rcu_read_lock();
644 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
645 iterator, data);
646 rcu_read_unlock();
647 }
648 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
649
650 void ieee80211_iterate_active_interfaces_rtnl(
651 struct ieee80211_hw *hw, u32 iter_flags,
652 void (*iterator)(void *data, u8 *mac,
653 struct ieee80211_vif *vif),
654 void *data)
655 {
656 struct ieee80211_local *local = hw_to_local(hw);
657
658 ASSERT_RTNL();
659
660 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
661 iterator, data);
662 }
663 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
664
665 static void __iterate_stations(struct ieee80211_local *local,
666 void (*iterator)(void *data,
667 struct ieee80211_sta *sta),
668 void *data)
669 {
670 struct sta_info *sta;
671
672 list_for_each_entry_rcu(sta, &local->sta_list, list) {
673 if (!sta->uploaded)
674 continue;
675
676 iterator(data, &sta->sta);
677 }
678 }
679
680 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
681 void (*iterator)(void *data,
682 struct ieee80211_sta *sta),
683 void *data)
684 {
685 struct ieee80211_local *local = hw_to_local(hw);
686
687 rcu_read_lock();
688 __iterate_stations(local, iterator, data);
689 rcu_read_unlock();
690 }
691 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
692
693 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
694 {
695 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
696
697 if (!ieee80211_sdata_running(sdata) ||
698 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
699 return NULL;
700 return &sdata->vif;
701 }
702 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
703
704 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
705 {
706 struct ieee80211_sub_if_data *sdata;
707
708 if (!vif)
709 return NULL;
710
711 sdata = vif_to_sdata(vif);
712
713 if (!ieee80211_sdata_running(sdata) ||
714 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
715 return NULL;
716
717 return &sdata->wdev;
718 }
719 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
720
721 /*
722 * Nothing should have been stuffed into the workqueue during
723 * the suspend->resume cycle. Since we can't check each caller
724 * of this function if we are already quiescing / suspended,
725 * check here and don't WARN since this can actually happen when
726 * the rx path (for example) is racing against __ieee80211_suspend
727 * and suspending / quiescing was set after the rx path checked
728 * them.
729 */
730 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
731 {
732 if (local->quiescing || (local->suspended && !local->resuming)) {
733 pr_warn("queueing ieee80211 work while going to suspend\n");
734 return false;
735 }
736
737 return true;
738 }
739
740 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
741 {
742 struct ieee80211_local *local = hw_to_local(hw);
743
744 if (!ieee80211_can_queue_work(local))
745 return;
746
747 queue_work(local->workqueue, work);
748 }
749 EXPORT_SYMBOL(ieee80211_queue_work);
750
751 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
752 struct delayed_work *dwork,
753 unsigned long delay)
754 {
755 struct ieee80211_local *local = hw_to_local(hw);
756
757 if (!ieee80211_can_queue_work(local))
758 return;
759
760 queue_delayed_work(local->workqueue, dwork, delay);
761 }
762 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
763
764 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
765 struct ieee802_11_elems *elems,
766 u64 filter, u32 crc)
767 {
768 size_t left = len;
769 const u8 *pos = start;
770 bool calc_crc = filter != 0;
771 DECLARE_BITMAP(seen_elems, 256);
772 const u8 *ie;
773
774 bitmap_zero(seen_elems, 256);
775 memset(elems, 0, sizeof(*elems));
776 elems->ie_start = start;
777 elems->total_len = len;
778
779 while (left >= 2) {
780 u8 id, elen;
781 bool elem_parse_failed;
782
783 id = *pos++;
784 elen = *pos++;
785 left -= 2;
786
787 if (elen > left) {
788 elems->parse_error = true;
789 break;
790 }
791
792 switch (id) {
793 case WLAN_EID_SSID:
794 case WLAN_EID_SUPP_RATES:
795 case WLAN_EID_FH_PARAMS:
796 case WLAN_EID_DS_PARAMS:
797 case WLAN_EID_CF_PARAMS:
798 case WLAN_EID_TIM:
799 case WLAN_EID_IBSS_PARAMS:
800 case WLAN_EID_CHALLENGE:
801 case WLAN_EID_RSN:
802 case WLAN_EID_ERP_INFO:
803 case WLAN_EID_EXT_SUPP_RATES:
804 case WLAN_EID_HT_CAPABILITY:
805 case WLAN_EID_HT_OPERATION:
806 case WLAN_EID_VHT_CAPABILITY:
807 case WLAN_EID_VHT_OPERATION:
808 case WLAN_EID_MESH_ID:
809 case WLAN_EID_MESH_CONFIG:
810 case WLAN_EID_PEER_MGMT:
811 case WLAN_EID_PREQ:
812 case WLAN_EID_PREP:
813 case WLAN_EID_PERR:
814 case WLAN_EID_RANN:
815 case WLAN_EID_CHANNEL_SWITCH:
816 case WLAN_EID_EXT_CHANSWITCH_ANN:
817 case WLAN_EID_COUNTRY:
818 case WLAN_EID_PWR_CONSTRAINT:
819 case WLAN_EID_TIMEOUT_INTERVAL:
820 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
821 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
822 case WLAN_EID_CHAN_SWITCH_PARAM:
823 case WLAN_EID_EXT_CAPABILITY:
824 case WLAN_EID_CHAN_SWITCH_TIMING:
825 case WLAN_EID_LINK_ID:
826 /*
827 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
828 * that if the content gets bigger it might be needed more than once
829 */
830 if (test_bit(id, seen_elems)) {
831 elems->parse_error = true;
832 left -= elen;
833 pos += elen;
834 continue;
835 }
836 break;
837 }
838
839 if (calc_crc && id < 64 && (filter & (1ULL << id)))
840 crc = crc32_be(crc, pos - 2, elen + 2);
841
842 elem_parse_failed = false;
843
844 switch (id) {
845 case WLAN_EID_LINK_ID:
846 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
847 elem_parse_failed = true;
848 break;
849 }
850 elems->lnk_id = (void *)(pos - 2);
851 break;
852 case WLAN_EID_CHAN_SWITCH_TIMING:
853 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
854 elem_parse_failed = true;
855 break;
856 }
857 elems->ch_sw_timing = (void *)pos;
858 break;
859 case WLAN_EID_EXT_CAPABILITY:
860 elems->ext_capab = pos;
861 elems->ext_capab_len = elen;
862 break;
863 case WLAN_EID_SSID:
864 elems->ssid = pos;
865 elems->ssid_len = elen;
866 break;
867 case WLAN_EID_SUPP_RATES:
868 elems->supp_rates = pos;
869 elems->supp_rates_len = elen;
870 break;
871 case WLAN_EID_DS_PARAMS:
872 if (elen >= 1)
873 elems->ds_params = pos;
874 else
875 elem_parse_failed = true;
876 break;
877 case WLAN_EID_TIM:
878 if (elen >= sizeof(struct ieee80211_tim_ie)) {
879 elems->tim = (void *)pos;
880 elems->tim_len = elen;
881 } else
882 elem_parse_failed = true;
883 break;
884 case WLAN_EID_CHALLENGE:
885 elems->challenge = pos;
886 elems->challenge_len = elen;
887 break;
888 case WLAN_EID_VENDOR_SPECIFIC:
889 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
890 pos[2] == 0xf2) {
891 /* Microsoft OUI (00:50:F2) */
892
893 if (calc_crc)
894 crc = crc32_be(crc, pos - 2, elen + 2);
895
896 if (elen >= 5 && pos[3] == 2) {
897 /* OUI Type 2 - WMM IE */
898 if (pos[4] == 0) {
899 elems->wmm_info = pos;
900 elems->wmm_info_len = elen;
901 } else if (pos[4] == 1) {
902 elems->wmm_param = pos;
903 elems->wmm_param_len = elen;
904 }
905 }
906 }
907 break;
908 case WLAN_EID_RSN:
909 elems->rsn = pos;
910 elems->rsn_len = elen;
911 break;
912 case WLAN_EID_ERP_INFO:
913 if (elen >= 1)
914 elems->erp_info = pos;
915 else
916 elem_parse_failed = true;
917 break;
918 case WLAN_EID_EXT_SUPP_RATES:
919 elems->ext_supp_rates = pos;
920 elems->ext_supp_rates_len = elen;
921 break;
922 case WLAN_EID_HT_CAPABILITY:
923 if (elen >= sizeof(struct ieee80211_ht_cap))
924 elems->ht_cap_elem = (void *)pos;
925 else
926 elem_parse_failed = true;
927 break;
928 case WLAN_EID_HT_OPERATION:
929 if (elen >= sizeof(struct ieee80211_ht_operation))
930 elems->ht_operation = (void *)pos;
931 else
932 elem_parse_failed = true;
933 break;
934 case WLAN_EID_VHT_CAPABILITY:
935 if (elen >= sizeof(struct ieee80211_vht_cap))
936 elems->vht_cap_elem = (void *)pos;
937 else
938 elem_parse_failed = true;
939 break;
940 case WLAN_EID_VHT_OPERATION:
941 if (elen >= sizeof(struct ieee80211_vht_operation))
942 elems->vht_operation = (void *)pos;
943 else
944 elem_parse_failed = true;
945 break;
946 case WLAN_EID_OPMODE_NOTIF:
947 if (elen > 0)
948 elems->opmode_notif = pos;
949 else
950 elem_parse_failed = true;
951 break;
952 case WLAN_EID_MESH_ID:
953 elems->mesh_id = pos;
954 elems->mesh_id_len = elen;
955 break;
956 case WLAN_EID_MESH_CONFIG:
957 if (elen >= sizeof(struct ieee80211_meshconf_ie))
958 elems->mesh_config = (void *)pos;
959 else
960 elem_parse_failed = true;
961 break;
962 case WLAN_EID_PEER_MGMT:
963 elems->peering = pos;
964 elems->peering_len = elen;
965 break;
966 case WLAN_EID_MESH_AWAKE_WINDOW:
967 if (elen >= 2)
968 elems->awake_window = (void *)pos;
969 break;
970 case WLAN_EID_PREQ:
971 elems->preq = pos;
972 elems->preq_len = elen;
973 break;
974 case WLAN_EID_PREP:
975 elems->prep = pos;
976 elems->prep_len = elen;
977 break;
978 case WLAN_EID_PERR:
979 elems->perr = pos;
980 elems->perr_len = elen;
981 break;
982 case WLAN_EID_RANN:
983 if (elen >= sizeof(struct ieee80211_rann_ie))
984 elems->rann = (void *)pos;
985 else
986 elem_parse_failed = true;
987 break;
988 case WLAN_EID_CHANNEL_SWITCH:
989 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
990 elem_parse_failed = true;
991 break;
992 }
993 elems->ch_switch_ie = (void *)pos;
994 break;
995 case WLAN_EID_EXT_CHANSWITCH_ANN:
996 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
997 elem_parse_failed = true;
998 break;
999 }
1000 elems->ext_chansw_ie = (void *)pos;
1001 break;
1002 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1003 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1004 elem_parse_failed = true;
1005 break;
1006 }
1007 elems->sec_chan_offs = (void *)pos;
1008 break;
1009 case WLAN_EID_CHAN_SWITCH_PARAM:
1010 if (elen !=
1011 sizeof(*elems->mesh_chansw_params_ie)) {
1012 elem_parse_failed = true;
1013 break;
1014 }
1015 elems->mesh_chansw_params_ie = (void *)pos;
1016 break;
1017 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1018 if (!action ||
1019 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1020 elem_parse_failed = true;
1021 break;
1022 }
1023 elems->wide_bw_chansw_ie = (void *)pos;
1024 break;
1025 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1026 if (action) {
1027 elem_parse_failed = true;
1028 break;
1029 }
1030 /*
1031 * This is a bit tricky, but as we only care about
1032 * the wide bandwidth channel switch element, so
1033 * just parse it out manually.
1034 */
1035 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1036 pos, elen);
1037 if (ie) {
1038 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1039 elems->wide_bw_chansw_ie =
1040 (void *)(ie + 2);
1041 else
1042 elem_parse_failed = true;
1043 }
1044 break;
1045 case WLAN_EID_COUNTRY:
1046 elems->country_elem = pos;
1047 elems->country_elem_len = elen;
1048 break;
1049 case WLAN_EID_PWR_CONSTRAINT:
1050 if (elen != 1) {
1051 elem_parse_failed = true;
1052 break;
1053 }
1054 elems->pwr_constr_elem = pos;
1055 break;
1056 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1057 /* Lots of different options exist, but we only care
1058 * about the Dynamic Transmit Power Control element.
1059 * First check for the Cisco OUI, then for the DTPC
1060 * tag (0x00).
1061 */
1062 if (elen < 4) {
1063 elem_parse_failed = true;
1064 break;
1065 }
1066
1067 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1068 pos[2] != 0x96 || pos[3] != 0x00)
1069 break;
1070
1071 if (elen != 6) {
1072 elem_parse_failed = true;
1073 break;
1074 }
1075
1076 if (calc_crc)
1077 crc = crc32_be(crc, pos - 2, elen + 2);
1078
1079 elems->cisco_dtpc_elem = pos;
1080 break;
1081 case WLAN_EID_TIMEOUT_INTERVAL:
1082 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1083 elems->timeout_int = (void *)pos;
1084 else
1085 elem_parse_failed = true;
1086 break;
1087 default:
1088 break;
1089 }
1090
1091 if (elem_parse_failed)
1092 elems->parse_error = true;
1093 else
1094 __set_bit(id, seen_elems);
1095
1096 left -= elen;
1097 pos += elen;
1098 }
1099
1100 if (left != 0)
1101 elems->parse_error = true;
1102
1103 return crc;
1104 }
1105
1106 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1107 bool bss_notify)
1108 {
1109 struct ieee80211_local *local = sdata->local;
1110 struct ieee80211_tx_queue_params qparam;
1111 struct ieee80211_chanctx_conf *chanctx_conf;
1112 int ac;
1113 bool use_11b, enable_qos;
1114 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1115 int aCWmin, aCWmax;
1116
1117 if (!local->ops->conf_tx)
1118 return;
1119
1120 if (local->hw.queues < IEEE80211_NUM_ACS)
1121 return;
1122
1123 memset(&qparam, 0, sizeof(qparam));
1124
1125 rcu_read_lock();
1126 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1127 use_11b = (chanctx_conf &&
1128 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1129 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1130 rcu_read_unlock();
1131
1132 /*
1133 * By default disable QoS in STA mode for old access points, which do
1134 * not support 802.11e. New APs will provide proper queue parameters,
1135 * that we will configure later.
1136 */
1137 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1138
1139 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1140
1141 /* Set defaults according to 802.11-2007 Table 7-37 */
1142 aCWmax = 1023;
1143 if (use_11b)
1144 aCWmin = 31;
1145 else
1146 aCWmin = 15;
1147
1148 /* Confiure old 802.11b/g medium access rules. */
1149 qparam.cw_max = aCWmax;
1150 qparam.cw_min = aCWmin;
1151 qparam.txop = 0;
1152 qparam.aifs = 2;
1153
1154 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1155 /* Update if QoS is enabled. */
1156 if (enable_qos) {
1157 switch (ac) {
1158 case IEEE80211_AC_BK:
1159 qparam.cw_max = aCWmax;
1160 qparam.cw_min = aCWmin;
1161 qparam.txop = 0;
1162 if (is_ocb)
1163 qparam.aifs = 9;
1164 else
1165 qparam.aifs = 7;
1166 break;
1167 /* never happens but let's not leave undefined */
1168 default:
1169 case IEEE80211_AC_BE:
1170 qparam.cw_max = aCWmax;
1171 qparam.cw_min = aCWmin;
1172 qparam.txop = 0;
1173 if (is_ocb)
1174 qparam.aifs = 6;
1175 else
1176 qparam.aifs = 3;
1177 break;
1178 case IEEE80211_AC_VI:
1179 qparam.cw_max = aCWmin;
1180 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1181 if (is_ocb)
1182 qparam.txop = 0;
1183 else if (use_11b)
1184 qparam.txop = 6016/32;
1185 else
1186 qparam.txop = 3008/32;
1187
1188 if (is_ocb)
1189 qparam.aifs = 3;
1190 else
1191 qparam.aifs = 2;
1192 break;
1193 case IEEE80211_AC_VO:
1194 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1195 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1196 if (is_ocb)
1197 qparam.txop = 0;
1198 else if (use_11b)
1199 qparam.txop = 3264/32;
1200 else
1201 qparam.txop = 1504/32;
1202 qparam.aifs = 2;
1203 break;
1204 }
1205 }
1206
1207 qparam.uapsd = false;
1208
1209 sdata->tx_conf[ac] = qparam;
1210 drv_conf_tx(local, sdata, ac, &qparam);
1211 }
1212
1213 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1214 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1215 sdata->vif.bss_conf.qos = enable_qos;
1216 if (bss_notify)
1217 ieee80211_bss_info_change_notify(sdata,
1218 BSS_CHANGED_QOS);
1219 }
1220 }
1221
1222 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1223 u16 transaction, u16 auth_alg, u16 status,
1224 const u8 *extra, size_t extra_len, const u8 *da,
1225 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1226 u32 tx_flags)
1227 {
1228 struct ieee80211_local *local = sdata->local;
1229 struct sk_buff *skb;
1230 struct ieee80211_mgmt *mgmt;
1231 int err;
1232
1233 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1234 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1235 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1236 if (!skb)
1237 return;
1238
1239 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1240
1241 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1242 memset(mgmt, 0, 24 + 6);
1243 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1244 IEEE80211_STYPE_AUTH);
1245 memcpy(mgmt->da, da, ETH_ALEN);
1246 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1247 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1248 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1249 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1250 mgmt->u.auth.status_code = cpu_to_le16(status);
1251 if (extra)
1252 memcpy(skb_put(skb, extra_len), extra, extra_len);
1253
1254 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1255 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1256 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1257 WARN_ON(err);
1258 }
1259
1260 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1261 tx_flags;
1262 ieee80211_tx_skb(sdata, skb);
1263 }
1264
1265 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1266 const u8 *bssid, u16 stype, u16 reason,
1267 bool send_frame, u8 *frame_buf)
1268 {
1269 struct ieee80211_local *local = sdata->local;
1270 struct sk_buff *skb;
1271 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1272
1273 /* build frame */
1274 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1275 mgmt->duration = 0; /* initialize only */
1276 mgmt->seq_ctrl = 0; /* initialize only */
1277 memcpy(mgmt->da, bssid, ETH_ALEN);
1278 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1279 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1280 /* u.deauth.reason_code == u.disassoc.reason_code */
1281 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1282
1283 if (send_frame) {
1284 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1285 IEEE80211_DEAUTH_FRAME_LEN);
1286 if (!skb)
1287 return;
1288
1289 skb_reserve(skb, local->hw.extra_tx_headroom);
1290
1291 /* copy in frame */
1292 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1293 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1294
1295 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1296 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1297 IEEE80211_SKB_CB(skb)->flags |=
1298 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1299
1300 ieee80211_tx_skb(sdata, skb);
1301 }
1302 }
1303
1304 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1305 u8 *buffer, size_t buffer_len,
1306 const u8 *ie, size_t ie_len,
1307 enum ieee80211_band band,
1308 u32 rate_mask,
1309 struct cfg80211_chan_def *chandef,
1310 size_t *offset)
1311 {
1312 struct ieee80211_supported_band *sband;
1313 u8 *pos = buffer, *end = buffer + buffer_len;
1314 size_t noffset;
1315 int supp_rates_len, i;
1316 u8 rates[32];
1317 int num_rates;
1318 int ext_rates_len;
1319 int shift;
1320 u32 rate_flags;
1321 bool have_80mhz = false;
1322
1323 *offset = 0;
1324
1325 sband = local->hw.wiphy->bands[band];
1326 if (WARN_ON_ONCE(!sband))
1327 return 0;
1328
1329 rate_flags = ieee80211_chandef_rate_flags(chandef);
1330 shift = ieee80211_chandef_get_shift(chandef);
1331
1332 num_rates = 0;
1333 for (i = 0; i < sband->n_bitrates; i++) {
1334 if ((BIT(i) & rate_mask) == 0)
1335 continue; /* skip rate */
1336 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1337 continue;
1338
1339 rates[num_rates++] =
1340 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1341 (1 << shift) * 5);
1342 }
1343
1344 supp_rates_len = min_t(int, num_rates, 8);
1345
1346 if (end - pos < 2 + supp_rates_len)
1347 goto out_err;
1348 *pos++ = WLAN_EID_SUPP_RATES;
1349 *pos++ = supp_rates_len;
1350 memcpy(pos, rates, supp_rates_len);
1351 pos += supp_rates_len;
1352
1353 /* insert "request information" if in custom IEs */
1354 if (ie && ie_len) {
1355 static const u8 before_extrates[] = {
1356 WLAN_EID_SSID,
1357 WLAN_EID_SUPP_RATES,
1358 WLAN_EID_REQUEST,
1359 };
1360 noffset = ieee80211_ie_split(ie, ie_len,
1361 before_extrates,
1362 ARRAY_SIZE(before_extrates),
1363 *offset);
1364 if (end - pos < noffset - *offset)
1365 goto out_err;
1366 memcpy(pos, ie + *offset, noffset - *offset);
1367 pos += noffset - *offset;
1368 *offset = noffset;
1369 }
1370
1371 ext_rates_len = num_rates - supp_rates_len;
1372 if (ext_rates_len > 0) {
1373 if (end - pos < 2 + ext_rates_len)
1374 goto out_err;
1375 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1376 *pos++ = ext_rates_len;
1377 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1378 pos += ext_rates_len;
1379 }
1380
1381 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1382 if (end - pos < 3)
1383 goto out_err;
1384 *pos++ = WLAN_EID_DS_PARAMS;
1385 *pos++ = 1;
1386 *pos++ = ieee80211_frequency_to_channel(
1387 chandef->chan->center_freq);
1388 }
1389
1390 /* insert custom IEs that go before HT */
1391 if (ie && ie_len) {
1392 static const u8 before_ht[] = {
1393 WLAN_EID_SSID,
1394 WLAN_EID_SUPP_RATES,
1395 WLAN_EID_REQUEST,
1396 WLAN_EID_EXT_SUPP_RATES,
1397 WLAN_EID_DS_PARAMS,
1398 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1399 };
1400 noffset = ieee80211_ie_split(ie, ie_len,
1401 before_ht, ARRAY_SIZE(before_ht),
1402 *offset);
1403 if (end - pos < noffset - *offset)
1404 goto out_err;
1405 memcpy(pos, ie + *offset, noffset - *offset);
1406 pos += noffset - *offset;
1407 *offset = noffset;
1408 }
1409
1410 if (sband->ht_cap.ht_supported) {
1411 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1412 goto out_err;
1413 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1414 sband->ht_cap.cap);
1415 }
1416
1417 /*
1418 * If adding more here, adjust code in main.c
1419 * that calculates local->scan_ies_len.
1420 */
1421
1422 /* insert custom IEs that go before VHT */
1423 if (ie && ie_len) {
1424 static const u8 before_vht[] = {
1425 WLAN_EID_SSID,
1426 WLAN_EID_SUPP_RATES,
1427 WLAN_EID_REQUEST,
1428 WLAN_EID_EXT_SUPP_RATES,
1429 WLAN_EID_DS_PARAMS,
1430 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1431 WLAN_EID_HT_CAPABILITY,
1432 WLAN_EID_BSS_COEX_2040,
1433 WLAN_EID_EXT_CAPABILITY,
1434 WLAN_EID_SSID_LIST,
1435 WLAN_EID_CHANNEL_USAGE,
1436 WLAN_EID_INTERWORKING,
1437 /* mesh ID can't happen here */
1438 /* 60 GHz can't happen here right now */
1439 };
1440 noffset = ieee80211_ie_split(ie, ie_len,
1441 before_vht, ARRAY_SIZE(before_vht),
1442 *offset);
1443 if (end - pos < noffset - *offset)
1444 goto out_err;
1445 memcpy(pos, ie + *offset, noffset - *offset);
1446 pos += noffset - *offset;
1447 *offset = noffset;
1448 }
1449
1450 /* Check if any channel in this sband supports at least 80 MHz */
1451 for (i = 0; i < sband->n_channels; i++) {
1452 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1453 IEEE80211_CHAN_NO_80MHZ))
1454 continue;
1455
1456 have_80mhz = true;
1457 break;
1458 }
1459
1460 if (sband->vht_cap.vht_supported && have_80mhz) {
1461 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1462 goto out_err;
1463 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1464 sband->vht_cap.cap);
1465 }
1466
1467 return pos - buffer;
1468 out_err:
1469 WARN_ONCE(1, "not enough space for preq IEs\n");
1470 return pos - buffer;
1471 }
1472
1473 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1474 size_t buffer_len,
1475 struct ieee80211_scan_ies *ie_desc,
1476 const u8 *ie, size_t ie_len,
1477 u8 bands_used, u32 *rate_masks,
1478 struct cfg80211_chan_def *chandef)
1479 {
1480 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1481 int i;
1482
1483 memset(ie_desc, 0, sizeof(*ie_desc));
1484
1485 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1486 if (bands_used & BIT(i)) {
1487 pos += ieee80211_build_preq_ies_band(local,
1488 buffer + pos,
1489 buffer_len - pos,
1490 ie, ie_len, i,
1491 rate_masks[i],
1492 chandef,
1493 &custom_ie_offset);
1494 ie_desc->ies[i] = buffer + old_pos;
1495 ie_desc->len[i] = pos - old_pos;
1496 old_pos = pos;
1497 }
1498 }
1499
1500 /* add any remaining custom IEs */
1501 if (ie && ie_len) {
1502 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1503 "not enough space for preq custom IEs\n"))
1504 return pos;
1505 memcpy(buffer + pos, ie + custom_ie_offset,
1506 ie_len - custom_ie_offset);
1507 ie_desc->common_ies = buffer + pos;
1508 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1509 pos += ie_len - custom_ie_offset;
1510 }
1511
1512 return pos;
1513 };
1514
1515 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1516 const u8 *src, const u8 *dst,
1517 u32 ratemask,
1518 struct ieee80211_channel *chan,
1519 const u8 *ssid, size_t ssid_len,
1520 const u8 *ie, size_t ie_len,
1521 bool directed)
1522 {
1523 struct ieee80211_local *local = sdata->local;
1524 struct cfg80211_chan_def chandef;
1525 struct sk_buff *skb;
1526 struct ieee80211_mgmt *mgmt;
1527 int ies_len;
1528 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1529 struct ieee80211_scan_ies dummy_ie_desc;
1530
1531 /*
1532 * Do not send DS Channel parameter for directed probe requests
1533 * in order to maximize the chance that we get a response. Some
1534 * badly-behaved APs don't respond when this parameter is included.
1535 */
1536 chandef.width = sdata->vif.bss_conf.chandef.width;
1537 if (directed)
1538 chandef.chan = NULL;
1539 else
1540 chandef.chan = chan;
1541
1542 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1543 100 + ie_len);
1544 if (!skb)
1545 return NULL;
1546
1547 rate_masks[chan->band] = ratemask;
1548 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1549 skb_tailroom(skb), &dummy_ie_desc,
1550 ie, ie_len, BIT(chan->band),
1551 rate_masks, &chandef);
1552 skb_put(skb, ies_len);
1553
1554 if (dst) {
1555 mgmt = (struct ieee80211_mgmt *) skb->data;
1556 memcpy(mgmt->da, dst, ETH_ALEN);
1557 memcpy(mgmt->bssid, dst, ETH_ALEN);
1558 }
1559
1560 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1561
1562 return skb;
1563 }
1564
1565 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1566 const u8 *src, const u8 *dst,
1567 const u8 *ssid, size_t ssid_len,
1568 const u8 *ie, size_t ie_len,
1569 u32 ratemask, bool directed, u32 tx_flags,
1570 struct ieee80211_channel *channel, bool scan)
1571 {
1572 struct sk_buff *skb;
1573
1574 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1575 ssid, ssid_len,
1576 ie, ie_len, directed);
1577 if (skb) {
1578 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1579 if (scan)
1580 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1581 else
1582 ieee80211_tx_skb(sdata, skb);
1583 }
1584 }
1585
1586 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1587 struct ieee802_11_elems *elems,
1588 enum ieee80211_band band, u32 *basic_rates)
1589 {
1590 struct ieee80211_supported_band *sband;
1591 size_t num_rates;
1592 u32 supp_rates, rate_flags;
1593 int i, j, shift;
1594 sband = sdata->local->hw.wiphy->bands[band];
1595
1596 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1597 shift = ieee80211_vif_get_shift(&sdata->vif);
1598
1599 if (WARN_ON(!sband))
1600 return 1;
1601
1602 num_rates = sband->n_bitrates;
1603 supp_rates = 0;
1604 for (i = 0; i < elems->supp_rates_len +
1605 elems->ext_supp_rates_len; i++) {
1606 u8 rate = 0;
1607 int own_rate;
1608 bool is_basic;
1609 if (i < elems->supp_rates_len)
1610 rate = elems->supp_rates[i];
1611 else if (elems->ext_supp_rates)
1612 rate = elems->ext_supp_rates
1613 [i - elems->supp_rates_len];
1614 own_rate = 5 * (rate & 0x7f);
1615 is_basic = !!(rate & 0x80);
1616
1617 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1618 continue;
1619
1620 for (j = 0; j < num_rates; j++) {
1621 int brate;
1622 if ((rate_flags & sband->bitrates[j].flags)
1623 != rate_flags)
1624 continue;
1625
1626 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1627 1 << shift);
1628
1629 if (brate == own_rate) {
1630 supp_rates |= BIT(j);
1631 if (basic_rates && is_basic)
1632 *basic_rates |= BIT(j);
1633 }
1634 }
1635 }
1636 return supp_rates;
1637 }
1638
1639 void ieee80211_stop_device(struct ieee80211_local *local)
1640 {
1641 ieee80211_led_radio(local, false);
1642 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1643
1644 cancel_work_sync(&local->reconfig_filter);
1645
1646 flush_workqueue(local->workqueue);
1647 drv_stop(local);
1648 }
1649
1650 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1651 {
1652 struct ieee80211_sub_if_data *sdata;
1653 struct ieee80211_chanctx *ctx;
1654
1655 /*
1656 * We get here if during resume the device can't be restarted properly.
1657 * We might also get here if this happens during HW reset, which is a
1658 * slightly different situation and we need to drop all connections in
1659 * the latter case.
1660 *
1661 * Ask cfg80211 to turn off all interfaces, this will result in more
1662 * warnings but at least we'll then get into a clean stopped state.
1663 */
1664
1665 local->resuming = false;
1666 local->suspended = false;
1667 local->started = false;
1668 local->in_reconfig = false;
1669
1670 /* scheduled scan clearly can't be running any more, but tell
1671 * cfg80211 and clear local state
1672 */
1673 ieee80211_sched_scan_end(local);
1674
1675 list_for_each_entry(sdata, &local->interfaces, list)
1676 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1677
1678 /* Mark channel contexts as not being in the driver any more to avoid
1679 * removing them from the driver during the shutdown process...
1680 */
1681 mutex_lock(&local->chanctx_mtx);
1682 list_for_each_entry(ctx, &local->chanctx_list, list)
1683 ctx->driver_present = false;
1684 mutex_unlock(&local->chanctx_mtx);
1685
1686 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1687 }
1688
1689 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1690 struct ieee80211_sub_if_data *sdata)
1691 {
1692 struct ieee80211_chanctx_conf *conf;
1693 struct ieee80211_chanctx *ctx;
1694
1695 if (!local->use_chanctx)
1696 return;
1697
1698 mutex_lock(&local->chanctx_mtx);
1699 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1700 lockdep_is_held(&local->chanctx_mtx));
1701 if (conf) {
1702 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1703 drv_assign_vif_chanctx(local, sdata, ctx);
1704 }
1705 mutex_unlock(&local->chanctx_mtx);
1706 }
1707
1708 int ieee80211_reconfig(struct ieee80211_local *local)
1709 {
1710 struct ieee80211_hw *hw = &local->hw;
1711 struct ieee80211_sub_if_data *sdata;
1712 struct ieee80211_chanctx *ctx;
1713 struct sta_info *sta;
1714 int res, i;
1715 bool reconfig_due_to_wowlan = false;
1716 struct ieee80211_sub_if_data *sched_scan_sdata;
1717 struct cfg80211_sched_scan_request *sched_scan_req;
1718 bool sched_scan_stopped = false;
1719 bool suspended = local->suspended;
1720
1721 /* nothing to do if HW shouldn't run */
1722 if (!local->open_count)
1723 goto wake_up;
1724
1725 #ifdef CONFIG_PM
1726 if (suspended)
1727 local->resuming = true;
1728
1729 if (local->wowlan) {
1730 /*
1731 * In the wowlan case, both mac80211 and the device
1732 * are functional when the resume op is called, so
1733 * clear local->suspended so the device could operate
1734 * normally (e.g. pass rx frames).
1735 */
1736 local->suspended = false;
1737 res = drv_resume(local);
1738 local->wowlan = false;
1739 if (res < 0) {
1740 local->resuming = false;
1741 return res;
1742 }
1743 if (res == 0)
1744 goto wake_up;
1745 WARN_ON(res > 1);
1746 /*
1747 * res is 1, which means the driver requested
1748 * to go through a regular reset on wakeup.
1749 * restore local->suspended in this case.
1750 */
1751 reconfig_due_to_wowlan = true;
1752 local->suspended = true;
1753 }
1754 #endif
1755
1756 /*
1757 * Upon resume hardware can sometimes be goofy due to
1758 * various platform / driver / bus issues, so restarting
1759 * the device may at times not work immediately. Propagate
1760 * the error.
1761 */
1762 res = drv_start(local);
1763 if (res) {
1764 if (suspended)
1765 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1766 else
1767 WARN(1, "Hardware became unavailable during restart.\n");
1768 ieee80211_handle_reconfig_failure(local);
1769 return res;
1770 }
1771
1772 /* setup fragmentation threshold */
1773 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1774
1775 /* setup RTS threshold */
1776 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1777
1778 /* reset coverage class */
1779 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1780
1781 ieee80211_led_radio(local, true);
1782 ieee80211_mod_tpt_led_trig(local,
1783 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1784
1785 /* add interfaces */
1786 sdata = rtnl_dereference(local->monitor_sdata);
1787 if (sdata) {
1788 /* in HW restart it exists already */
1789 WARN_ON(local->resuming);
1790 res = drv_add_interface(local, sdata);
1791 if (WARN_ON(res)) {
1792 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1793 synchronize_net();
1794 kfree(sdata);
1795 }
1796 }
1797
1798 list_for_each_entry(sdata, &local->interfaces, list) {
1799 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1800 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1801 ieee80211_sdata_running(sdata)) {
1802 res = drv_add_interface(local, sdata);
1803 if (WARN_ON(res))
1804 break;
1805 }
1806 }
1807
1808 /* If adding any of the interfaces failed above, roll back and
1809 * report failure.
1810 */
1811 if (res) {
1812 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1813 list)
1814 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1815 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1816 ieee80211_sdata_running(sdata))
1817 drv_remove_interface(local, sdata);
1818 ieee80211_handle_reconfig_failure(local);
1819 return res;
1820 }
1821
1822 /* add channel contexts */
1823 if (local->use_chanctx) {
1824 mutex_lock(&local->chanctx_mtx);
1825 list_for_each_entry(ctx, &local->chanctx_list, list)
1826 if (ctx->replace_state !=
1827 IEEE80211_CHANCTX_REPLACES_OTHER)
1828 WARN_ON(drv_add_chanctx(local, ctx));
1829 mutex_unlock(&local->chanctx_mtx);
1830
1831 list_for_each_entry(sdata, &local->interfaces, list) {
1832 if (!ieee80211_sdata_running(sdata))
1833 continue;
1834 ieee80211_assign_chanctx(local, sdata);
1835 }
1836
1837 sdata = rtnl_dereference(local->monitor_sdata);
1838 if (sdata && ieee80211_sdata_running(sdata))
1839 ieee80211_assign_chanctx(local, sdata);
1840 }
1841
1842 /* add STAs back */
1843 mutex_lock(&local->sta_mtx);
1844 list_for_each_entry(sta, &local->sta_list, list) {
1845 enum ieee80211_sta_state state;
1846
1847 if (!sta->uploaded)
1848 continue;
1849
1850 /* AP-mode stations will be added later */
1851 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1852 continue;
1853
1854 for (state = IEEE80211_STA_NOTEXIST;
1855 state < sta->sta_state; state++)
1856 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1857 state + 1));
1858 }
1859 mutex_unlock(&local->sta_mtx);
1860
1861 /* reconfigure tx conf */
1862 if (hw->queues >= IEEE80211_NUM_ACS) {
1863 list_for_each_entry(sdata, &local->interfaces, list) {
1864 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1865 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1866 !ieee80211_sdata_running(sdata))
1867 continue;
1868
1869 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1870 drv_conf_tx(local, sdata, i,
1871 &sdata->tx_conf[i]);
1872 }
1873 }
1874
1875 /* reconfigure hardware */
1876 ieee80211_hw_config(local, ~0);
1877
1878 ieee80211_configure_filter(local);
1879
1880 /* Finally also reconfigure all the BSS information */
1881 list_for_each_entry(sdata, &local->interfaces, list) {
1882 u32 changed;
1883
1884 if (!ieee80211_sdata_running(sdata))
1885 continue;
1886
1887 /* common change flags for all interface types */
1888 changed = BSS_CHANGED_ERP_CTS_PROT |
1889 BSS_CHANGED_ERP_PREAMBLE |
1890 BSS_CHANGED_ERP_SLOT |
1891 BSS_CHANGED_HT |
1892 BSS_CHANGED_BASIC_RATES |
1893 BSS_CHANGED_BEACON_INT |
1894 BSS_CHANGED_BSSID |
1895 BSS_CHANGED_CQM |
1896 BSS_CHANGED_QOS |
1897 BSS_CHANGED_IDLE |
1898 BSS_CHANGED_TXPOWER;
1899
1900 switch (sdata->vif.type) {
1901 case NL80211_IFTYPE_STATION:
1902 changed |= BSS_CHANGED_ASSOC |
1903 BSS_CHANGED_ARP_FILTER |
1904 BSS_CHANGED_PS;
1905
1906 /* Re-send beacon info report to the driver */
1907 if (sdata->u.mgd.have_beacon)
1908 changed |= BSS_CHANGED_BEACON_INFO;
1909
1910 sdata_lock(sdata);
1911 ieee80211_bss_info_change_notify(sdata, changed);
1912 sdata_unlock(sdata);
1913 break;
1914 case NL80211_IFTYPE_OCB:
1915 changed |= BSS_CHANGED_OCB;
1916 ieee80211_bss_info_change_notify(sdata, changed);
1917 break;
1918 case NL80211_IFTYPE_ADHOC:
1919 changed |= BSS_CHANGED_IBSS;
1920 /* fall through */
1921 case NL80211_IFTYPE_AP:
1922 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1923
1924 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1925 changed |= BSS_CHANGED_AP_PROBE_RESP;
1926
1927 if (rcu_access_pointer(sdata->u.ap.beacon))
1928 drv_start_ap(local, sdata);
1929 }
1930
1931 /* fall through */
1932 case NL80211_IFTYPE_MESH_POINT:
1933 if (sdata->vif.bss_conf.enable_beacon) {
1934 changed |= BSS_CHANGED_BEACON |
1935 BSS_CHANGED_BEACON_ENABLED;
1936 ieee80211_bss_info_change_notify(sdata, changed);
1937 }
1938 break;
1939 case NL80211_IFTYPE_WDS:
1940 case NL80211_IFTYPE_AP_VLAN:
1941 case NL80211_IFTYPE_MONITOR:
1942 case NL80211_IFTYPE_P2P_DEVICE:
1943 /* nothing to do */
1944 break;
1945 case NL80211_IFTYPE_UNSPECIFIED:
1946 case NUM_NL80211_IFTYPES:
1947 case NL80211_IFTYPE_P2P_CLIENT:
1948 case NL80211_IFTYPE_P2P_GO:
1949 WARN_ON(1);
1950 break;
1951 }
1952 }
1953
1954 ieee80211_recalc_ps(local, -1);
1955
1956 /*
1957 * The sta might be in psm against the ap (e.g. because
1958 * this was the state before a hw restart), so we
1959 * explicitly send a null packet in order to make sure
1960 * it'll sync against the ap (and get out of psm).
1961 */
1962 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1963 list_for_each_entry(sdata, &local->interfaces, list) {
1964 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1965 continue;
1966 if (!sdata->u.mgd.associated)
1967 continue;
1968
1969 ieee80211_send_nullfunc(local, sdata, 0);
1970 }
1971 }
1972
1973 /* APs are now beaconing, add back stations */
1974 mutex_lock(&local->sta_mtx);
1975 list_for_each_entry(sta, &local->sta_list, list) {
1976 enum ieee80211_sta_state state;
1977
1978 if (!sta->uploaded)
1979 continue;
1980
1981 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1982 continue;
1983
1984 for (state = IEEE80211_STA_NOTEXIST;
1985 state < sta->sta_state; state++)
1986 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1987 state + 1));
1988 }
1989 mutex_unlock(&local->sta_mtx);
1990
1991 /* add back keys */
1992 list_for_each_entry(sdata, &local->interfaces, list)
1993 ieee80211_reset_crypto_tx_tailroom(sdata);
1994
1995 list_for_each_entry(sdata, &local->interfaces, list)
1996 if (ieee80211_sdata_running(sdata))
1997 ieee80211_enable_keys(sdata);
1998
1999 wake_up:
2000 local->in_reconfig = false;
2001 barrier();
2002
2003 if (local->monitors == local->open_count && local->monitors > 0)
2004 ieee80211_add_virtual_monitor(local);
2005
2006 /*
2007 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2008 * sessions can be established after a resume.
2009 *
2010 * Also tear down aggregation sessions since reconfiguring
2011 * them in a hardware restart scenario is not easily done
2012 * right now, and the hardware will have lost information
2013 * about the sessions, but we and the AP still think they
2014 * are active. This is really a workaround though.
2015 */
2016 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2017 mutex_lock(&local->sta_mtx);
2018
2019 list_for_each_entry(sta, &local->sta_list, list) {
2020 ieee80211_sta_tear_down_BA_sessions(
2021 sta, AGG_STOP_LOCAL_REQUEST);
2022 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2023 }
2024
2025 mutex_unlock(&local->sta_mtx);
2026 }
2027
2028 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2029 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2030 false);
2031
2032 /*
2033 * Reconfigure sched scan if it was interrupted by FW restart or
2034 * suspend.
2035 */
2036 mutex_lock(&local->mtx);
2037 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2038 lockdep_is_held(&local->mtx));
2039 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2040 lockdep_is_held(&local->mtx));
2041 if (sched_scan_sdata && sched_scan_req)
2042 /*
2043 * Sched scan stopped, but we don't want to report it. Instead,
2044 * we're trying to reschedule.
2045 */
2046 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2047 sched_scan_req))
2048 sched_scan_stopped = true;
2049 mutex_unlock(&local->mtx);
2050
2051 if (sched_scan_stopped)
2052 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2053
2054 /*
2055 * If this is for hw restart things are still running.
2056 * We may want to change that later, however.
2057 */
2058 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2059 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2060
2061 if (!suspended)
2062 return 0;
2063
2064 #ifdef CONFIG_PM
2065 /* first set suspended false, then resuming */
2066 local->suspended = false;
2067 mb();
2068 local->resuming = false;
2069
2070 /* It's possible that we don't handle the scan completion in
2071 * time during suspend, so if it's still marked as completed
2072 * here, queue the work and flush it to clean things up.
2073 * Instead of calling the worker function directly here, we
2074 * really queue it to avoid potential races with other flows
2075 * scheduling the same work.
2076 */
2077 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2078 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2079 flush_delayed_work(&local->scan_work);
2080 }
2081
2082 if (local->open_count && !reconfig_due_to_wowlan)
2083 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2084
2085 list_for_each_entry(sdata, &local->interfaces, list) {
2086 if (!ieee80211_sdata_running(sdata))
2087 continue;
2088 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2089 ieee80211_sta_restart(sdata);
2090 }
2091
2092 mod_timer(&local->sta_cleanup, jiffies + 1);
2093 #else
2094 WARN_ON(1);
2095 #endif
2096
2097 return 0;
2098 }
2099
2100 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2101 {
2102 struct ieee80211_sub_if_data *sdata;
2103 struct ieee80211_local *local;
2104 struct ieee80211_key *key;
2105
2106 if (WARN_ON(!vif))
2107 return;
2108
2109 sdata = vif_to_sdata(vif);
2110 local = sdata->local;
2111
2112 if (WARN_ON(!local->resuming))
2113 return;
2114
2115 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2116 return;
2117
2118 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2119
2120 mutex_lock(&local->key_mtx);
2121 list_for_each_entry(key, &sdata->key_list, list)
2122 key->flags |= KEY_FLAG_TAINTED;
2123 mutex_unlock(&local->key_mtx);
2124 }
2125 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2126
2127 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2128 {
2129 struct ieee80211_local *local = sdata->local;
2130 struct ieee80211_chanctx_conf *chanctx_conf;
2131 struct ieee80211_chanctx *chanctx;
2132
2133 mutex_lock(&local->chanctx_mtx);
2134
2135 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2136 lockdep_is_held(&local->chanctx_mtx));
2137
2138 if (WARN_ON_ONCE(!chanctx_conf))
2139 goto unlock;
2140
2141 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2142 ieee80211_recalc_smps_chanctx(local, chanctx);
2143 unlock:
2144 mutex_unlock(&local->chanctx_mtx);
2145 }
2146
2147 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2148 {
2149 struct ieee80211_local *local = sdata->local;
2150 struct ieee80211_chanctx_conf *chanctx_conf;
2151 struct ieee80211_chanctx *chanctx;
2152
2153 mutex_lock(&local->chanctx_mtx);
2154
2155 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2156 lockdep_is_held(&local->chanctx_mtx));
2157
2158 if (WARN_ON_ONCE(!chanctx_conf))
2159 goto unlock;
2160
2161 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2162 ieee80211_recalc_chanctx_min_def(local, chanctx);
2163 unlock:
2164 mutex_unlock(&local->chanctx_mtx);
2165 }
2166
2167 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2168 {
2169 size_t pos = offset;
2170
2171 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2172 pos += 2 + ies[pos + 1];
2173
2174 return pos;
2175 }
2176
2177 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2178 int rssi_min_thold,
2179 int rssi_max_thold)
2180 {
2181 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2182
2183 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2184 return;
2185
2186 /*
2187 * Scale up threshold values before storing it, as the RSSI averaging
2188 * algorithm uses a scaled up value as well. Change this scaling
2189 * factor if the RSSI averaging algorithm changes.
2190 */
2191 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2192 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2193 }
2194
2195 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2196 int rssi_min_thold,
2197 int rssi_max_thold)
2198 {
2199 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2200
2201 WARN_ON(rssi_min_thold == rssi_max_thold ||
2202 rssi_min_thold > rssi_max_thold);
2203
2204 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2205 rssi_max_thold);
2206 }
2207 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2208
2209 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2210 {
2211 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2212
2213 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2214 }
2215 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2216
2217 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2218 u16 cap)
2219 {
2220 __le16 tmp;
2221
2222 *pos++ = WLAN_EID_HT_CAPABILITY;
2223 *pos++ = sizeof(struct ieee80211_ht_cap);
2224 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2225
2226 /* capability flags */
2227 tmp = cpu_to_le16(cap);
2228 memcpy(pos, &tmp, sizeof(u16));
2229 pos += sizeof(u16);
2230
2231 /* AMPDU parameters */
2232 *pos++ = ht_cap->ampdu_factor |
2233 (ht_cap->ampdu_density <<
2234 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2235
2236 /* MCS set */
2237 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2238 pos += sizeof(ht_cap->mcs);
2239
2240 /* extended capabilities */
2241 pos += sizeof(__le16);
2242
2243 /* BF capabilities */
2244 pos += sizeof(__le32);
2245
2246 /* antenna selection */
2247 pos += sizeof(u8);
2248
2249 return pos;
2250 }
2251
2252 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2253 u32 cap)
2254 {
2255 __le32 tmp;
2256
2257 *pos++ = WLAN_EID_VHT_CAPABILITY;
2258 *pos++ = sizeof(struct ieee80211_vht_cap);
2259 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2260
2261 /* capability flags */
2262 tmp = cpu_to_le32(cap);
2263 memcpy(pos, &tmp, sizeof(u32));
2264 pos += sizeof(u32);
2265
2266 /* VHT MCS set */
2267 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2268 pos += sizeof(vht_cap->vht_mcs);
2269
2270 return pos;
2271 }
2272
2273 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2274 const struct cfg80211_chan_def *chandef,
2275 u16 prot_mode)
2276 {
2277 struct ieee80211_ht_operation *ht_oper;
2278 /* Build HT Information */
2279 *pos++ = WLAN_EID_HT_OPERATION;
2280 *pos++ = sizeof(struct ieee80211_ht_operation);
2281 ht_oper = (struct ieee80211_ht_operation *)pos;
2282 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2283 chandef->chan->center_freq);
2284 switch (chandef->width) {
2285 case NL80211_CHAN_WIDTH_160:
2286 case NL80211_CHAN_WIDTH_80P80:
2287 case NL80211_CHAN_WIDTH_80:
2288 case NL80211_CHAN_WIDTH_40:
2289 if (chandef->center_freq1 > chandef->chan->center_freq)
2290 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2291 else
2292 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2293 break;
2294 default:
2295 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2296 break;
2297 }
2298 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2299 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2300 chandef->width != NL80211_CHAN_WIDTH_20)
2301 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2302
2303 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2304 ht_oper->stbc_param = 0x0000;
2305
2306 /* It seems that Basic MCS set and Supported MCS set
2307 are identical for the first 10 bytes */
2308 memset(&ht_oper->basic_set, 0, 16);
2309 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2310
2311 return pos + sizeof(struct ieee80211_ht_operation);
2312 }
2313
2314 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2315 const struct cfg80211_chan_def *chandef)
2316 {
2317 struct ieee80211_vht_operation *vht_oper;
2318
2319 *pos++ = WLAN_EID_VHT_OPERATION;
2320 *pos++ = sizeof(struct ieee80211_vht_operation);
2321 vht_oper = (struct ieee80211_vht_operation *)pos;
2322 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2323 chandef->center_freq1);
2324 if (chandef->center_freq2)
2325 vht_oper->center_freq_seg2_idx =
2326 ieee80211_frequency_to_channel(chandef->center_freq2);
2327
2328 switch (chandef->width) {
2329 case NL80211_CHAN_WIDTH_160:
2330 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2331 break;
2332 case NL80211_CHAN_WIDTH_80P80:
2333 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2334 break;
2335 case NL80211_CHAN_WIDTH_80:
2336 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2337 break;
2338 default:
2339 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2340 break;
2341 }
2342
2343 /* don't require special VHT peer rates */
2344 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2345
2346 return pos + sizeof(struct ieee80211_vht_operation);
2347 }
2348
2349 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2350 const struct ieee80211_ht_operation *ht_oper,
2351 struct cfg80211_chan_def *chandef)
2352 {
2353 enum nl80211_channel_type channel_type;
2354
2355 if (!ht_oper) {
2356 cfg80211_chandef_create(chandef, control_chan,
2357 NL80211_CHAN_NO_HT);
2358 return;
2359 }
2360
2361 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2362 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2363 channel_type = NL80211_CHAN_HT20;
2364 break;
2365 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2366 channel_type = NL80211_CHAN_HT40PLUS;
2367 break;
2368 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2369 channel_type = NL80211_CHAN_HT40MINUS;
2370 break;
2371 default:
2372 channel_type = NL80211_CHAN_NO_HT;
2373 }
2374
2375 cfg80211_chandef_create(chandef, control_chan, channel_type);
2376 }
2377
2378 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2379 const struct ieee80211_vht_operation *oper,
2380 struct cfg80211_chan_def *chandef)
2381 {
2382 if (!oper)
2383 return;
2384
2385 chandef->chan = control_chan;
2386
2387 switch (oper->chan_width) {
2388 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2389 break;
2390 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2391 chandef->width = NL80211_CHAN_WIDTH_80;
2392 break;
2393 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2394 chandef->width = NL80211_CHAN_WIDTH_160;
2395 break;
2396 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2397 chandef->width = NL80211_CHAN_WIDTH_80P80;
2398 break;
2399 default:
2400 break;
2401 }
2402
2403 chandef->center_freq1 =
2404 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2405 control_chan->band);
2406 chandef->center_freq2 =
2407 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2408 control_chan->band);
2409 }
2410
2411 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2412 const struct ieee80211_supported_band *sband,
2413 const u8 *srates, int srates_len, u32 *rates)
2414 {
2415 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2416 int shift = ieee80211_chandef_get_shift(chandef);
2417 struct ieee80211_rate *br;
2418 int brate, rate, i, j, count = 0;
2419
2420 *rates = 0;
2421
2422 for (i = 0; i < srates_len; i++) {
2423 rate = srates[i] & 0x7f;
2424
2425 for (j = 0; j < sband->n_bitrates; j++) {
2426 br = &sband->bitrates[j];
2427 if ((rate_flags & br->flags) != rate_flags)
2428 continue;
2429
2430 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2431 if (brate == rate) {
2432 *rates |= BIT(j);
2433 count++;
2434 break;
2435 }
2436 }
2437 }
2438 return count;
2439 }
2440
2441 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2442 struct sk_buff *skb, bool need_basic,
2443 enum ieee80211_band band)
2444 {
2445 struct ieee80211_local *local = sdata->local;
2446 struct ieee80211_supported_band *sband;
2447 int rate, shift;
2448 u8 i, rates, *pos;
2449 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2450 u32 rate_flags;
2451
2452 shift = ieee80211_vif_get_shift(&sdata->vif);
2453 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2454 sband = local->hw.wiphy->bands[band];
2455 rates = 0;
2456 for (i = 0; i < sband->n_bitrates; i++) {
2457 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2458 continue;
2459 rates++;
2460 }
2461 if (rates > 8)
2462 rates = 8;
2463
2464 if (skb_tailroom(skb) < rates + 2)
2465 return -ENOMEM;
2466
2467 pos = skb_put(skb, rates + 2);
2468 *pos++ = WLAN_EID_SUPP_RATES;
2469 *pos++ = rates;
2470 for (i = 0; i < rates; i++) {
2471 u8 basic = 0;
2472 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2473 continue;
2474
2475 if (need_basic && basic_rates & BIT(i))
2476 basic = 0x80;
2477 rate = sband->bitrates[i].bitrate;
2478 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2479 5 * (1 << shift));
2480 *pos++ = basic | (u8) rate;
2481 }
2482
2483 return 0;
2484 }
2485
2486 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2487 struct sk_buff *skb, bool need_basic,
2488 enum ieee80211_band band)
2489 {
2490 struct ieee80211_local *local = sdata->local;
2491 struct ieee80211_supported_band *sband;
2492 int rate, shift;
2493 u8 i, exrates, *pos;
2494 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2495 u32 rate_flags;
2496
2497 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2498 shift = ieee80211_vif_get_shift(&sdata->vif);
2499
2500 sband = local->hw.wiphy->bands[band];
2501 exrates = 0;
2502 for (i = 0; i < sband->n_bitrates; i++) {
2503 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2504 continue;
2505 exrates++;
2506 }
2507
2508 if (exrates > 8)
2509 exrates -= 8;
2510 else
2511 exrates = 0;
2512
2513 if (skb_tailroom(skb) < exrates + 2)
2514 return -ENOMEM;
2515
2516 if (exrates) {
2517 pos = skb_put(skb, exrates + 2);
2518 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2519 *pos++ = exrates;
2520 for (i = 8; i < sband->n_bitrates; i++) {
2521 u8 basic = 0;
2522 if ((rate_flags & sband->bitrates[i].flags)
2523 != rate_flags)
2524 continue;
2525 if (need_basic && basic_rates & BIT(i))
2526 basic = 0x80;
2527 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2528 5 * (1 << shift));
2529 *pos++ = basic | (u8) rate;
2530 }
2531 }
2532 return 0;
2533 }
2534
2535 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2536 {
2537 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2539
2540 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2541 /* non-managed type inferfaces */
2542 return 0;
2543 }
2544 return ifmgd->ave_beacon_signal / 16;
2545 }
2546 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2547
2548 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2549 {
2550 if (!mcs)
2551 return 1;
2552
2553 /* TODO: consider rx_highest */
2554
2555 if (mcs->rx_mask[3])
2556 return 4;
2557 if (mcs->rx_mask[2])
2558 return 3;
2559 if (mcs->rx_mask[1])
2560 return 2;
2561 return 1;
2562 }
2563
2564 /**
2565 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2566 * @local: mac80211 hw info struct
2567 * @status: RX status
2568 * @mpdu_len: total MPDU length (including FCS)
2569 * @mpdu_offset: offset into MPDU to calculate timestamp at
2570 *
2571 * This function calculates the RX timestamp at the given MPDU offset, taking
2572 * into account what the RX timestamp was. An offset of 0 will just normalize
2573 * the timestamp to TSF at beginning of MPDU reception.
2574 */
2575 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2576 struct ieee80211_rx_status *status,
2577 unsigned int mpdu_len,
2578 unsigned int mpdu_offset)
2579 {
2580 u64 ts = status->mactime;
2581 struct rate_info ri;
2582 u16 rate;
2583
2584 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2585 return 0;
2586
2587 memset(&ri, 0, sizeof(ri));
2588
2589 /* Fill cfg80211 rate info */
2590 if (status->flag & RX_FLAG_HT) {
2591 ri.mcs = status->rate_idx;
2592 ri.flags |= RATE_INFO_FLAGS_MCS;
2593 if (status->flag & RX_FLAG_40MHZ)
2594 ri.bw = RATE_INFO_BW_40;
2595 else
2596 ri.bw = RATE_INFO_BW_20;
2597 if (status->flag & RX_FLAG_SHORT_GI)
2598 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2599 } else if (status->flag & RX_FLAG_VHT) {
2600 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2601 ri.mcs = status->rate_idx;
2602 ri.nss = status->vht_nss;
2603 if (status->flag & RX_FLAG_40MHZ)
2604 ri.bw = RATE_INFO_BW_40;
2605 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2606 ri.bw = RATE_INFO_BW_80;
2607 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2608 ri.bw = RATE_INFO_BW_160;
2609 else
2610 ri.bw = RATE_INFO_BW_20;
2611 if (status->flag & RX_FLAG_SHORT_GI)
2612 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2613 } else {
2614 struct ieee80211_supported_band *sband;
2615 int shift = 0;
2616 int bitrate;
2617
2618 if (status->flag & RX_FLAG_10MHZ) {
2619 shift = 1;
2620 ri.bw = RATE_INFO_BW_10;
2621 } else if (status->flag & RX_FLAG_5MHZ) {
2622 shift = 2;
2623 ri.bw = RATE_INFO_BW_5;
2624 } else {
2625 ri.bw = RATE_INFO_BW_20;
2626 }
2627
2628 sband = local->hw.wiphy->bands[status->band];
2629 bitrate = sband->bitrates[status->rate_idx].bitrate;
2630 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2631 }
2632
2633 rate = cfg80211_calculate_bitrate(&ri);
2634 if (WARN_ONCE(!rate,
2635 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2636 status->flag, status->rate_idx, status->vht_nss))
2637 return 0;
2638
2639 /* rewind from end of MPDU */
2640 if (status->flag & RX_FLAG_MACTIME_END)
2641 ts -= mpdu_len * 8 * 10 / rate;
2642
2643 ts += mpdu_offset * 8 * 10 / rate;
2644
2645 return ts;
2646 }
2647
2648 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2649 {
2650 struct ieee80211_sub_if_data *sdata;
2651 struct cfg80211_chan_def chandef;
2652
2653 mutex_lock(&local->mtx);
2654 mutex_lock(&local->iflist_mtx);
2655 list_for_each_entry(sdata, &local->interfaces, list) {
2656 /* it might be waiting for the local->mtx, but then
2657 * by the time it gets it, sdata->wdev.cac_started
2658 * will no longer be true
2659 */
2660 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2661
2662 if (sdata->wdev.cac_started) {
2663 chandef = sdata->vif.bss_conf.chandef;
2664 ieee80211_vif_release_channel(sdata);
2665 cfg80211_cac_event(sdata->dev,
2666 &chandef,
2667 NL80211_RADAR_CAC_ABORTED,
2668 GFP_KERNEL);
2669 }
2670 }
2671 mutex_unlock(&local->iflist_mtx);
2672 mutex_unlock(&local->mtx);
2673 }
2674
2675 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2676 {
2677 struct ieee80211_local *local =
2678 container_of(work, struct ieee80211_local, radar_detected_work);
2679 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2680 struct ieee80211_chanctx *ctx;
2681 int num_chanctx = 0;
2682
2683 mutex_lock(&local->chanctx_mtx);
2684 list_for_each_entry(ctx, &local->chanctx_list, list) {
2685 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2686 continue;
2687
2688 num_chanctx++;
2689 chandef = ctx->conf.def;
2690 }
2691 mutex_unlock(&local->chanctx_mtx);
2692
2693 ieee80211_dfs_cac_cancel(local);
2694
2695 if (num_chanctx > 1)
2696 /* XXX: multi-channel is not supported yet */
2697 WARN_ON(1);
2698 else
2699 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2700 }
2701
2702 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2703 {
2704 struct ieee80211_local *local = hw_to_local(hw);
2705
2706 trace_api_radar_detected(local);
2707
2708 ieee80211_queue_work(hw, &local->radar_detected_work);
2709 }
2710 EXPORT_SYMBOL(ieee80211_radar_detected);
2711
2712 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2713 {
2714 u32 ret;
2715 int tmp;
2716
2717 switch (c->width) {
2718 case NL80211_CHAN_WIDTH_20:
2719 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2720 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2721 break;
2722 case NL80211_CHAN_WIDTH_40:
2723 c->width = NL80211_CHAN_WIDTH_20;
2724 c->center_freq1 = c->chan->center_freq;
2725 ret = IEEE80211_STA_DISABLE_40MHZ |
2726 IEEE80211_STA_DISABLE_VHT;
2727 break;
2728 case NL80211_CHAN_WIDTH_80:
2729 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2730 /* n_P40 */
2731 tmp /= 2;
2732 /* freq_P40 */
2733 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2734 c->width = NL80211_CHAN_WIDTH_40;
2735 ret = IEEE80211_STA_DISABLE_VHT;
2736 break;
2737 case NL80211_CHAN_WIDTH_80P80:
2738 c->center_freq2 = 0;
2739 c->width = NL80211_CHAN_WIDTH_80;
2740 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2741 IEEE80211_STA_DISABLE_160MHZ;
2742 break;
2743 case NL80211_CHAN_WIDTH_160:
2744 /* n_P20 */
2745 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2746 /* n_P80 */
2747 tmp /= 4;
2748 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2749 c->width = NL80211_CHAN_WIDTH_80;
2750 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2751 IEEE80211_STA_DISABLE_160MHZ;
2752 break;
2753 default:
2754 case NL80211_CHAN_WIDTH_20_NOHT:
2755 WARN_ON_ONCE(1);
2756 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2757 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2758 break;
2759 case NL80211_CHAN_WIDTH_5:
2760 case NL80211_CHAN_WIDTH_10:
2761 WARN_ON_ONCE(1);
2762 /* keep c->width */
2763 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2764 break;
2765 }
2766
2767 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2768
2769 return ret;
2770 }
2771
2772 /*
2773 * Returns true if smps_mode_new is strictly more restrictive than
2774 * smps_mode_old.
2775 */
2776 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2777 enum ieee80211_smps_mode smps_mode_new)
2778 {
2779 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2780 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2781 return false;
2782
2783 switch (smps_mode_old) {
2784 case IEEE80211_SMPS_STATIC:
2785 return false;
2786 case IEEE80211_SMPS_DYNAMIC:
2787 return smps_mode_new == IEEE80211_SMPS_STATIC;
2788 case IEEE80211_SMPS_OFF:
2789 return smps_mode_new != IEEE80211_SMPS_OFF;
2790 default:
2791 WARN_ON(1);
2792 }
2793
2794 return false;
2795 }
2796
2797 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2798 struct cfg80211_csa_settings *csa_settings)
2799 {
2800 struct sk_buff *skb;
2801 struct ieee80211_mgmt *mgmt;
2802 struct ieee80211_local *local = sdata->local;
2803 int freq;
2804 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2805 sizeof(mgmt->u.action.u.chan_switch);
2806 u8 *pos;
2807
2808 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2809 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2810 return -EOPNOTSUPP;
2811
2812 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2813 5 + /* channel switch announcement element */
2814 3 + /* secondary channel offset element */
2815 8); /* mesh channel switch parameters element */
2816 if (!skb)
2817 return -ENOMEM;
2818
2819 skb_reserve(skb, local->tx_headroom);
2820 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2821 memset(mgmt, 0, hdr_len);
2822 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2823 IEEE80211_STYPE_ACTION);
2824
2825 eth_broadcast_addr(mgmt->da);
2826 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2827 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2828 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2829 } else {
2830 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2831 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2832 }
2833 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2834 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2835 pos = skb_put(skb, 5);
2836 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2837 *pos++ = 3; /* IE length */
2838 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2839 freq = csa_settings->chandef.chan->center_freq;
2840 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2841 *pos++ = csa_settings->count; /* count */
2842
2843 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2844 enum nl80211_channel_type ch_type;
2845
2846 skb_put(skb, 3);
2847 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2848 *pos++ = 1; /* IE length */
2849 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2850 if (ch_type == NL80211_CHAN_HT40PLUS)
2851 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2852 else
2853 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2854 }
2855
2856 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2857 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2858
2859 skb_put(skb, 8);
2860 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2861 *pos++ = 6; /* IE length */
2862 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2863 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2864 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2865 *pos++ |= csa_settings->block_tx ?
2866 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2867 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2868 pos += 2;
2869 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2870 pos += 2;
2871 }
2872
2873 ieee80211_tx_skb(sdata, skb);
2874 return 0;
2875 }
2876
2877 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2878 {
2879 return !(cs == NULL || cs->cipher == 0 ||
2880 cs->hdr_len < cs->pn_len + cs->pn_off ||
2881 cs->hdr_len <= cs->key_idx_off ||
2882 cs->key_idx_shift > 7 ||
2883 cs->key_idx_mask == 0);
2884 }
2885
2886 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2887 {
2888 int i;
2889
2890 /* Ensure we have enough iftype bitmap space for all iftype values */
2891 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2892
2893 for (i = 0; i < n; i++)
2894 if (!ieee80211_cs_valid(&cs[i]))
2895 return false;
2896
2897 return true;
2898 }
2899
2900 const struct ieee80211_cipher_scheme *
2901 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2902 enum nl80211_iftype iftype)
2903 {
2904 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2905 int n = local->hw.n_cipher_schemes;
2906 int i;
2907 const struct ieee80211_cipher_scheme *cs = NULL;
2908
2909 for (i = 0; i < n; i++) {
2910 if (l[i].cipher == cipher) {
2911 cs = &l[i];
2912 break;
2913 }
2914 }
2915
2916 if (!cs || !(cs->iftype & BIT(iftype)))
2917 return NULL;
2918
2919 return cs;
2920 }
2921
2922 int ieee80211_cs_headroom(struct ieee80211_local *local,
2923 struct cfg80211_crypto_settings *crypto,
2924 enum nl80211_iftype iftype)
2925 {
2926 const struct ieee80211_cipher_scheme *cs;
2927 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2928 int i;
2929
2930 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2931 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2932 iftype);
2933
2934 if (cs && headroom < cs->hdr_len)
2935 headroom = cs->hdr_len;
2936 }
2937
2938 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2939 if (cs && headroom < cs->hdr_len)
2940 headroom = cs->hdr_len;
2941
2942 return headroom;
2943 }
2944
2945 static bool
2946 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2947 {
2948 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2949 int skip;
2950
2951 if (end > 0)
2952 return false;
2953
2954 /* End time is in the past, check for repetitions */
2955 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2956 if (data->count[i] < 255) {
2957 if (data->count[i] <= skip) {
2958 data->count[i] = 0;
2959 return false;
2960 }
2961
2962 data->count[i] -= skip;
2963 }
2964
2965 data->desc[i].start += skip * data->desc[i].interval;
2966
2967 return true;
2968 }
2969
2970 static bool
2971 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2972 s32 *offset)
2973 {
2974 bool ret = false;
2975 int i;
2976
2977 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2978 s32 cur;
2979
2980 if (!data->count[i])
2981 continue;
2982
2983 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2984 ret = true;
2985
2986 cur = data->desc[i].start - tsf;
2987 if (cur > *offset)
2988 continue;
2989
2990 cur = data->desc[i].start + data->desc[i].duration - tsf;
2991 if (cur > *offset)
2992 *offset = cur;
2993 }
2994
2995 return ret;
2996 }
2997
2998 static u32
2999 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3000 {
3001 s32 offset = 0;
3002 int tries = 0;
3003 /*
3004 * arbitrary limit, used to avoid infinite loops when combined NoA
3005 * descriptors cover the full time period.
3006 */
3007 int max_tries = 5;
3008
3009 ieee80211_extend_absent_time(data, tsf, &offset);
3010 do {
3011 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3012 break;
3013
3014 tries++;
3015 } while (tries < max_tries);
3016
3017 return offset;
3018 }
3019
3020 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3021 {
3022 u32 next_offset = BIT(31) - 1;
3023 int i;
3024
3025 data->absent = 0;
3026 data->has_next_tsf = false;
3027 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3028 s32 start;
3029
3030 if (!data->count[i])
3031 continue;
3032
3033 ieee80211_extend_noa_desc(data, tsf, i);
3034 start = data->desc[i].start - tsf;
3035 if (start <= 0)
3036 data->absent |= BIT(i);
3037
3038 if (next_offset > start)
3039 next_offset = start;
3040
3041 data->has_next_tsf = true;
3042 }
3043
3044 if (data->absent)
3045 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3046
3047 data->next_tsf = tsf + next_offset;
3048 }
3049 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3050
3051 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3052 struct ieee80211_noa_data *data, u32 tsf)
3053 {
3054 int ret = 0;
3055 int i;
3056
3057 memset(data, 0, sizeof(*data));
3058
3059 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3060 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3061
3062 if (!desc->count || !desc->duration)
3063 continue;
3064
3065 data->count[i] = desc->count;
3066 data->desc[i].start = le32_to_cpu(desc->start_time);
3067 data->desc[i].duration = le32_to_cpu(desc->duration);
3068 data->desc[i].interval = le32_to_cpu(desc->interval);
3069
3070 if (data->count[i] > 1 &&
3071 data->desc[i].interval < data->desc[i].duration)
3072 continue;
3073
3074 ieee80211_extend_noa_desc(data, tsf, i);
3075 ret++;
3076 }
3077
3078 if (ret)
3079 ieee80211_update_p2p_noa(data, tsf);
3080
3081 return ret;
3082 }
3083 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3084
3085 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3086 struct ieee80211_sub_if_data *sdata)
3087 {
3088 u64 tsf = drv_get_tsf(local, sdata);
3089 u64 dtim_count = 0;
3090 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3091 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3092 struct ps_data *ps;
3093 u8 bcns_from_dtim;
3094
3095 if (tsf == -1ULL || !beacon_int || !dtim_period)
3096 return;
3097
3098 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3099 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3100 if (!sdata->bss)
3101 return;
3102
3103 ps = &sdata->bss->ps;
3104 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3105 ps = &sdata->u.mesh.ps;
3106 } else {
3107 return;
3108 }
3109
3110 /*
3111 * actually finds last dtim_count, mac80211 will update in
3112 * __beacon_add_tim().
3113 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3114 */
3115 do_div(tsf, beacon_int);
3116 bcns_from_dtim = do_div(tsf, dtim_period);
3117 /* just had a DTIM */
3118 if (!bcns_from_dtim)
3119 dtim_count = 0;
3120 else
3121 dtim_count = dtim_period - bcns_from_dtim;
3122
3123 ps->dtim_count = dtim_count;
3124 }
3125
3126 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3127 struct ieee80211_chanctx *ctx)
3128 {
3129 struct ieee80211_sub_if_data *sdata;
3130 u8 radar_detect = 0;
3131
3132 lockdep_assert_held(&local->chanctx_mtx);
3133
3134 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3135 return 0;
3136
3137 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3138 if (sdata->reserved_radar_required)
3139 radar_detect |= BIT(sdata->reserved_chandef.width);
3140
3141 /*
3142 * An in-place reservation context should not have any assigned vifs
3143 * until it replaces the other context.
3144 */
3145 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3146 !list_empty(&ctx->assigned_vifs));
3147
3148 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3149 if (sdata->radar_required)
3150 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3151
3152 return radar_detect;
3153 }
3154
3155 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3156 const struct cfg80211_chan_def *chandef,
3157 enum ieee80211_chanctx_mode chanmode,
3158 u8 radar_detect)
3159 {
3160 struct ieee80211_local *local = sdata->local;
3161 struct ieee80211_sub_if_data *sdata_iter;
3162 enum nl80211_iftype iftype = sdata->wdev.iftype;
3163 int num[NUM_NL80211_IFTYPES];
3164 struct ieee80211_chanctx *ctx;
3165 int num_different_channels = 0;
3166 int total = 1;
3167
3168 lockdep_assert_held(&local->chanctx_mtx);
3169
3170 if (WARN_ON(hweight32(radar_detect) > 1))
3171 return -EINVAL;
3172
3173 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3174 !chandef->chan))
3175 return -EINVAL;
3176
3177 if (chandef)
3178 num_different_channels = 1;
3179
3180 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3181 return -EINVAL;
3182
3183 /* Always allow software iftypes */
3184 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3185 if (radar_detect)
3186 return -EINVAL;
3187 return 0;
3188 }
3189
3190 memset(num, 0, sizeof(num));
3191
3192 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3193 num[iftype] = 1;
3194
3195 list_for_each_entry(ctx, &local->chanctx_list, list) {
3196 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3197 continue;
3198 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3199 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3200 num_different_channels++;
3201 continue;
3202 }
3203 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3204 cfg80211_chandef_compatible(chandef,
3205 &ctx->conf.def))
3206 continue;
3207 num_different_channels++;
3208 }
3209
3210 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3211 struct wireless_dev *wdev_iter;
3212
3213 wdev_iter = &sdata_iter->wdev;
3214
3215 if (sdata_iter == sdata ||
3216 !ieee80211_sdata_running(sdata_iter) ||
3217 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3218 continue;
3219
3220 num[wdev_iter->iftype]++;
3221 total++;
3222 }
3223
3224 if (total == 1 && !radar_detect)
3225 return 0;
3226
3227 return cfg80211_check_combinations(local->hw.wiphy,
3228 num_different_channels,
3229 radar_detect, num);
3230 }
3231
3232 static void
3233 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3234 void *data)
3235 {
3236 u32 *max_num_different_channels = data;
3237
3238 *max_num_different_channels = max(*max_num_different_channels,
3239 c->num_different_channels);
3240 }
3241
3242 int ieee80211_max_num_channels(struct ieee80211_local *local)
3243 {
3244 struct ieee80211_sub_if_data *sdata;
3245 int num[NUM_NL80211_IFTYPES] = {};
3246 struct ieee80211_chanctx *ctx;
3247 int num_different_channels = 0;
3248 u8 radar_detect = 0;
3249 u32 max_num_different_channels = 1;
3250 int err;
3251
3252 lockdep_assert_held(&local->chanctx_mtx);
3253
3254 list_for_each_entry(ctx, &local->chanctx_list, list) {
3255 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3256 continue;
3257
3258 num_different_channels++;
3259
3260 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3261 }
3262
3263 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3264 num[sdata->wdev.iftype]++;
3265
3266 err = cfg80211_iter_combinations(local->hw.wiphy,
3267 num_different_channels, radar_detect,
3268 num, ieee80211_iter_max_chans,
3269 &max_num_different_channels);
3270 if (err < 0)
3271 return err;
3272
3273 return max_num_different_channels;
3274 }
3275
3276 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3277 {
3278 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3279 *buf++ = 7; /* len */
3280 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3281 *buf++ = 0x50;
3282 *buf++ = 0xf2;
3283 *buf++ = 2; /* WME */
3284 *buf++ = 0; /* WME info */
3285 *buf++ = 1; /* WME ver */
3286 *buf++ = qosinfo; /* U-APSD no in use */
3287
3288 return buf;
3289 }
3290
3291 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3292 struct sta_info *sta,
3293 struct txq_info *txqi, int tid)
3294 {
3295 skb_queue_head_init(&txqi->queue);
3296 txqi->txq.vif = &sdata->vif;
3297
3298 if (sta) {
3299 txqi->txq.sta = &sta->sta;
3300 sta->sta.txq[tid] = &txqi->txq;
3301 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3302 } else {
3303 sdata->vif.txq = &txqi->txq;
3304 txqi->txq.ac = IEEE80211_AC_BE;
3305 }
3306 }
Linux kernel - Deliverables
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