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Merge tag 'mailbox-v4.16' of git://git.linaro.org/landing-teams/working/fujitsu/integ...
[mirror_ubuntu-eoan-kernel.git] / net / mac80211 / util.c
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015-2017 Intel Deutschland GmbH
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * utilities for mac80211
14 */
15
16 #include <net/mac80211.h>
17 #include <linux/netdevice.h>
18 #include <linux/export.h>
19 #include <linux/types.h>
20 #include <linux/slab.h>
21 #include <linux/skbuff.h>
22 #include <linux/etherdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/bitmap.h>
25 #include <linux/crc32.h>
26 #include <net/net_namespace.h>
27 #include <net/cfg80211.h>
28 #include <net/rtnetlink.h>
29
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
32 #include "rate.h"
33 #include "mesh.h"
34 #include "wme.h"
35 #include "led.h"
36 #include "wep.h"
37
38 /* privid for wiphys to determine whether they belong to us or not */
39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
40
41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
42 {
43 struct ieee80211_local *local;
44 BUG_ON(!wiphy);
45
46 local = wiphy_priv(wiphy);
47 return &local->hw;
48 }
49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
50
51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
52 {
53 struct sk_buff *skb;
54 struct ieee80211_hdr *hdr;
55
56 skb_queue_walk(&tx->skbs, skb) {
57 hdr = (struct ieee80211_hdr *) skb->data;
58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
59 }
60 }
61
62 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
63 int rate, int erp, int short_preamble,
64 int shift)
65 {
66 int dur;
67
68 /* calculate duration (in microseconds, rounded up to next higher
69 * integer if it includes a fractional microsecond) to send frame of
70 * len bytes (does not include FCS) at the given rate. Duration will
71 * also include SIFS.
72 *
73 * rate is in 100 kbps, so divident is multiplied by 10 in the
74 * DIV_ROUND_UP() operations.
75 *
76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
77 * is assumed to be 0 otherwise.
78 */
79
80 if (band == NL80211_BAND_5GHZ || erp) {
81 /*
82 * OFDM:
83 *
84 * N_DBPS = DATARATE x 4
85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
86 * (16 = SIGNAL time, 6 = tail bits)
87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
88 *
89 * T_SYM = 4 usec
90 * 802.11a - 18.5.2: aSIFSTime = 16 usec
91 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
92 * signal ext = 6 usec
93 */
94 dur = 16; /* SIFS + signal ext */
95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
97
98 /* IEEE 802.11-2012 18.3.2.4: all values above are:
99 * * times 4 for 5 MHz
100 * * times 2 for 10 MHz
101 */
102 dur *= 1 << shift;
103
104 /* rates should already consider the channel bandwidth,
105 * don't apply divisor again.
106 */
107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
108 4 * rate); /* T_SYM x N_SYM */
109 } else {
110 /*
111 * 802.11b or 802.11g with 802.11b compatibility:
112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
114 *
115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
116 * aSIFSTime = 10 usec
117 * aPreambleLength = 144 usec or 72 usec with short preamble
118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
119 */
120 dur = 10; /* aSIFSTime = 10 usec */
121 dur += short_preamble ? (72 + 24) : (144 + 48);
122
123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
124 }
125
126 return dur;
127 }
128
129 /* Exported duration function for driver use */
130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
131 struct ieee80211_vif *vif,
132 enum nl80211_band band,
133 size_t frame_len,
134 struct ieee80211_rate *rate)
135 {
136 struct ieee80211_sub_if_data *sdata;
137 u16 dur;
138 int erp, shift = 0;
139 bool short_preamble = false;
140
141 erp = 0;
142 if (vif) {
143 sdata = vif_to_sdata(vif);
144 short_preamble = sdata->vif.bss_conf.use_short_preamble;
145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
146 erp = rate->flags & IEEE80211_RATE_ERP_G;
147 shift = ieee80211_vif_get_shift(vif);
148 }
149
150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
151 short_preamble, shift);
152
153 return cpu_to_le16(dur);
154 }
155 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
156
157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
158 struct ieee80211_vif *vif, size_t frame_len,
159 const struct ieee80211_tx_info *frame_txctl)
160 {
161 struct ieee80211_local *local = hw_to_local(hw);
162 struct ieee80211_rate *rate;
163 struct ieee80211_sub_if_data *sdata;
164 bool short_preamble;
165 int erp, shift = 0, bitrate;
166 u16 dur;
167 struct ieee80211_supported_band *sband;
168
169 sband = local->hw.wiphy->bands[frame_txctl->band];
170
171 short_preamble = false;
172
173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
174
175 erp = 0;
176 if (vif) {
177 sdata = vif_to_sdata(vif);
178 short_preamble = sdata->vif.bss_conf.use_short_preamble;
179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
180 erp = rate->flags & IEEE80211_RATE_ERP_G;
181 shift = ieee80211_vif_get_shift(vif);
182 }
183
184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
185
186 /* CTS duration */
187 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
188 erp, short_preamble, shift);
189 /* Data frame duration */
190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
191 erp, short_preamble, shift);
192 /* ACK duration */
193 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
194 erp, short_preamble, shift);
195
196 return cpu_to_le16(dur);
197 }
198 EXPORT_SYMBOL(ieee80211_rts_duration);
199
200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
201 struct ieee80211_vif *vif,
202 size_t frame_len,
203 const struct ieee80211_tx_info *frame_txctl)
204 {
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
208 bool short_preamble;
209 int erp, shift = 0, bitrate;
210 u16 dur;
211 struct ieee80211_supported_band *sband;
212
213 sband = local->hw.wiphy->bands[frame_txctl->band];
214
215 short_preamble = false;
216
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
218 erp = 0;
219 if (vif) {
220 sdata = vif_to_sdata(vif);
221 short_preamble = sdata->vif.bss_conf.use_short_preamble;
222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
223 erp = rate->flags & IEEE80211_RATE_ERP_G;
224 shift = ieee80211_vif_get_shift(vif);
225 }
226
227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
228
229 /* Data frame duration */
230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
231 erp, short_preamble, shift);
232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
233 /* ACK duration */
234 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 }
237
238 return cpu_to_le16(dur);
239 }
240 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
241
242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
243 {
244 struct ieee80211_sub_if_data *sdata;
245 int n_acs = IEEE80211_NUM_ACS;
246
247 if (local->ops->wake_tx_queue)
248 return;
249
250 if (local->hw.queues < IEEE80211_NUM_ACS)
251 n_acs = 1;
252
253 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
254 int ac;
255
256 if (!sdata->dev)
257 continue;
258
259 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
260 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
261 continue;
262
263 for (ac = 0; ac < n_acs; ac++) {
264 int ac_queue = sdata->vif.hw_queue[ac];
265
266 if (ac_queue == queue ||
267 (sdata->vif.cab_queue == queue &&
268 local->queue_stop_reasons[ac_queue] == 0 &&
269 skb_queue_empty(&local->pending[ac_queue])))
270 netif_wake_subqueue(sdata->dev, ac);
271 }
272 }
273 }
274
275 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
276 enum queue_stop_reason reason,
277 bool refcounted)
278 {
279 struct ieee80211_local *local = hw_to_local(hw);
280
281 trace_wake_queue(local, queue, reason);
282
283 if (WARN_ON(queue >= hw->queues))
284 return;
285
286 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
287 return;
288
289 if (!refcounted) {
290 local->q_stop_reasons[queue][reason] = 0;
291 } else {
292 local->q_stop_reasons[queue][reason]--;
293 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
294 local->q_stop_reasons[queue][reason] = 0;
295 }
296
297 if (local->q_stop_reasons[queue][reason] == 0)
298 __clear_bit(reason, &local->queue_stop_reasons[queue]);
299
300 if (local->queue_stop_reasons[queue] != 0)
301 /* someone still has this queue stopped */
302 return;
303
304 if (skb_queue_empty(&local->pending[queue])) {
305 rcu_read_lock();
306 ieee80211_propagate_queue_wake(local, queue);
307 rcu_read_unlock();
308 } else
309 tasklet_schedule(&local->tx_pending_tasklet);
310 }
311
312 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
313 enum queue_stop_reason reason,
314 bool refcounted)
315 {
316 struct ieee80211_local *local = hw_to_local(hw);
317 unsigned long flags;
318
319 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
320 __ieee80211_wake_queue(hw, queue, reason, refcounted);
321 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
322 }
323
324 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
325 {
326 ieee80211_wake_queue_by_reason(hw, queue,
327 IEEE80211_QUEUE_STOP_REASON_DRIVER,
328 false);
329 }
330 EXPORT_SYMBOL(ieee80211_wake_queue);
331
332 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
333 enum queue_stop_reason reason,
334 bool refcounted)
335 {
336 struct ieee80211_local *local = hw_to_local(hw);
337 struct ieee80211_sub_if_data *sdata;
338 int n_acs = IEEE80211_NUM_ACS;
339
340 trace_stop_queue(local, queue, reason);
341
342 if (WARN_ON(queue >= hw->queues))
343 return;
344
345 if (!refcounted)
346 local->q_stop_reasons[queue][reason] = 1;
347 else
348 local->q_stop_reasons[queue][reason]++;
349
350 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
351 return;
352
353 if (local->ops->wake_tx_queue)
354 return;
355
356 if (local->hw.queues < IEEE80211_NUM_ACS)
357 n_acs = 1;
358
359 rcu_read_lock();
360 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
361 int ac;
362
363 if (!sdata->dev)
364 continue;
365
366 for (ac = 0; ac < n_acs; ac++) {
367 if (sdata->vif.hw_queue[ac] == queue ||
368 sdata->vif.cab_queue == queue)
369 netif_stop_subqueue(sdata->dev, ac);
370 }
371 }
372 rcu_read_unlock();
373 }
374
375 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
376 enum queue_stop_reason reason,
377 bool refcounted)
378 {
379 struct ieee80211_local *local = hw_to_local(hw);
380 unsigned long flags;
381
382 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
383 __ieee80211_stop_queue(hw, queue, reason, refcounted);
384 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
385 }
386
387 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
388 {
389 ieee80211_stop_queue_by_reason(hw, queue,
390 IEEE80211_QUEUE_STOP_REASON_DRIVER,
391 false);
392 }
393 EXPORT_SYMBOL(ieee80211_stop_queue);
394
395 void ieee80211_add_pending_skb(struct ieee80211_local *local,
396 struct sk_buff *skb)
397 {
398 struct ieee80211_hw *hw = &local->hw;
399 unsigned long flags;
400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
401 int queue = info->hw_queue;
402
403 if (WARN_ON(!info->control.vif)) {
404 ieee80211_free_txskb(&local->hw, skb);
405 return;
406 }
407
408 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
409 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
410 false);
411 __skb_queue_tail(&local->pending[queue], skb);
412 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
413 false);
414 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
415 }
416
417 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
418 struct sk_buff_head *skbs)
419 {
420 struct ieee80211_hw *hw = &local->hw;
421 struct sk_buff *skb;
422 unsigned long flags;
423 int queue, i;
424
425 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
426 while ((skb = skb_dequeue(skbs))) {
427 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
428
429 if (WARN_ON(!info->control.vif)) {
430 ieee80211_free_txskb(&local->hw, skb);
431 continue;
432 }
433
434 queue = info->hw_queue;
435
436 __ieee80211_stop_queue(hw, queue,
437 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
438 false);
439
440 __skb_queue_tail(&local->pending[queue], skb);
441 }
442
443 for (i = 0; i < hw->queues; i++)
444 __ieee80211_wake_queue(hw, i,
445 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
446 false);
447 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
448 }
449
450 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
451 unsigned long queues,
452 enum queue_stop_reason reason,
453 bool refcounted)
454 {
455 struct ieee80211_local *local = hw_to_local(hw);
456 unsigned long flags;
457 int i;
458
459 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
460
461 for_each_set_bit(i, &queues, hw->queues)
462 __ieee80211_stop_queue(hw, i, reason, refcounted);
463
464 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
465 }
466
467 void ieee80211_stop_queues(struct ieee80211_hw *hw)
468 {
469 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
470 IEEE80211_QUEUE_STOP_REASON_DRIVER,
471 false);
472 }
473 EXPORT_SYMBOL(ieee80211_stop_queues);
474
475 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
476 {
477 struct ieee80211_local *local = hw_to_local(hw);
478 unsigned long flags;
479 int ret;
480
481 if (WARN_ON(queue >= hw->queues))
482 return true;
483
484 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
485 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
486 &local->queue_stop_reasons[queue]);
487 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
488 return ret;
489 }
490 EXPORT_SYMBOL(ieee80211_queue_stopped);
491
492 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
493 unsigned long queues,
494 enum queue_stop_reason reason,
495 bool refcounted)
496 {
497 struct ieee80211_local *local = hw_to_local(hw);
498 unsigned long flags;
499 int i;
500
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502
503 for_each_set_bit(i, &queues, hw->queues)
504 __ieee80211_wake_queue(hw, i, reason, refcounted);
505
506 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
507 }
508
509 void ieee80211_wake_queues(struct ieee80211_hw *hw)
510 {
511 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
512 IEEE80211_QUEUE_STOP_REASON_DRIVER,
513 false);
514 }
515 EXPORT_SYMBOL(ieee80211_wake_queues);
516
517 static unsigned int
518 ieee80211_get_vif_queues(struct ieee80211_local *local,
519 struct ieee80211_sub_if_data *sdata)
520 {
521 unsigned int queues;
522
523 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
524 int ac;
525
526 queues = 0;
527
528 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
529 queues |= BIT(sdata->vif.hw_queue[ac]);
530 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
531 queues |= BIT(sdata->vif.cab_queue);
532 } else {
533 /* all queues */
534 queues = BIT(local->hw.queues) - 1;
535 }
536
537 return queues;
538 }
539
540 void __ieee80211_flush_queues(struct ieee80211_local *local,
541 struct ieee80211_sub_if_data *sdata,
542 unsigned int queues, bool drop)
543 {
544 if (!local->ops->flush)
545 return;
546
547 /*
548 * If no queue was set, or if the HW doesn't support
549 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
550 */
551 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
552 queues = ieee80211_get_vif_queues(local, sdata);
553
554 ieee80211_stop_queues_by_reason(&local->hw, queues,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH,
556 false);
557
558 drv_flush(local, sdata, queues, drop);
559
560 ieee80211_wake_queues_by_reason(&local->hw, queues,
561 IEEE80211_QUEUE_STOP_REASON_FLUSH,
562 false);
563 }
564
565 void ieee80211_flush_queues(struct ieee80211_local *local,
566 struct ieee80211_sub_if_data *sdata, bool drop)
567 {
568 __ieee80211_flush_queues(local, sdata, 0, drop);
569 }
570
571 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
572 struct ieee80211_sub_if_data *sdata,
573 enum queue_stop_reason reason)
574 {
575 ieee80211_stop_queues_by_reason(&local->hw,
576 ieee80211_get_vif_queues(local, sdata),
577 reason, true);
578 }
579
580 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
581 struct ieee80211_sub_if_data *sdata,
582 enum queue_stop_reason reason)
583 {
584 ieee80211_wake_queues_by_reason(&local->hw,
585 ieee80211_get_vif_queues(local, sdata),
586 reason, true);
587 }
588
589 static void __iterate_interfaces(struct ieee80211_local *local,
590 u32 iter_flags,
591 void (*iterator)(void *data, u8 *mac,
592 struct ieee80211_vif *vif),
593 void *data)
594 {
595 struct ieee80211_sub_if_data *sdata;
596 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
597
598 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
599 switch (sdata->vif.type) {
600 case NL80211_IFTYPE_MONITOR:
601 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
602 continue;
603 break;
604 case NL80211_IFTYPE_AP_VLAN:
605 continue;
606 default:
607 break;
608 }
609 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
610 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
611 continue;
612 if (ieee80211_sdata_running(sdata) || !active_only)
613 iterator(data, sdata->vif.addr,
614 &sdata->vif);
615 }
616
617 sdata = rcu_dereference_check(local->monitor_sdata,
618 lockdep_is_held(&local->iflist_mtx) ||
619 lockdep_rtnl_is_held());
620 if (sdata &&
621 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
622 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
623 iterator(data, sdata->vif.addr, &sdata->vif);
624 }
625
626 void ieee80211_iterate_interfaces(
627 struct ieee80211_hw *hw, u32 iter_flags,
628 void (*iterator)(void *data, u8 *mac,
629 struct ieee80211_vif *vif),
630 void *data)
631 {
632 struct ieee80211_local *local = hw_to_local(hw);
633
634 mutex_lock(&local->iflist_mtx);
635 __iterate_interfaces(local, iter_flags, iterator, data);
636 mutex_unlock(&local->iflist_mtx);
637 }
638 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
639
640 void ieee80211_iterate_active_interfaces_atomic(
641 struct ieee80211_hw *hw, u32 iter_flags,
642 void (*iterator)(void *data, u8 *mac,
643 struct ieee80211_vif *vif),
644 void *data)
645 {
646 struct ieee80211_local *local = hw_to_local(hw);
647
648 rcu_read_lock();
649 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
650 iterator, data);
651 rcu_read_unlock();
652 }
653 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
654
655 void ieee80211_iterate_active_interfaces_rtnl(
656 struct ieee80211_hw *hw, u32 iter_flags,
657 void (*iterator)(void *data, u8 *mac,
658 struct ieee80211_vif *vif),
659 void *data)
660 {
661 struct ieee80211_local *local = hw_to_local(hw);
662
663 ASSERT_RTNL();
664
665 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
666 iterator, data);
667 }
668 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
669
670 static void __iterate_stations(struct ieee80211_local *local,
671 void (*iterator)(void *data,
672 struct ieee80211_sta *sta),
673 void *data)
674 {
675 struct sta_info *sta;
676
677 list_for_each_entry_rcu(sta, &local->sta_list, list) {
678 if (!sta->uploaded)
679 continue;
680
681 iterator(data, &sta->sta);
682 }
683 }
684
685 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
686 void (*iterator)(void *data,
687 struct ieee80211_sta *sta),
688 void *data)
689 {
690 struct ieee80211_local *local = hw_to_local(hw);
691
692 rcu_read_lock();
693 __iterate_stations(local, iterator, data);
694 rcu_read_unlock();
695 }
696 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
697
698 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
699 {
700 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
701
702 if (!ieee80211_sdata_running(sdata) ||
703 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
704 return NULL;
705 return &sdata->vif;
706 }
707 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
708
709 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
710 {
711 struct ieee80211_sub_if_data *sdata;
712
713 if (!vif)
714 return NULL;
715
716 sdata = vif_to_sdata(vif);
717
718 if (!ieee80211_sdata_running(sdata) ||
719 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
720 return NULL;
721
722 return &sdata->wdev;
723 }
724 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
725
726 /*
727 * Nothing should have been stuffed into the workqueue during
728 * the suspend->resume cycle. Since we can't check each caller
729 * of this function if we are already quiescing / suspended,
730 * check here and don't WARN since this can actually happen when
731 * the rx path (for example) is racing against __ieee80211_suspend
732 * and suspending / quiescing was set after the rx path checked
733 * them.
734 */
735 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
736 {
737 if (local->quiescing || (local->suspended && !local->resuming)) {
738 pr_warn("queueing ieee80211 work while going to suspend\n");
739 return false;
740 }
741
742 return true;
743 }
744
745 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
746 {
747 struct ieee80211_local *local = hw_to_local(hw);
748
749 if (!ieee80211_can_queue_work(local))
750 return;
751
752 queue_work(local->workqueue, work);
753 }
754 EXPORT_SYMBOL(ieee80211_queue_work);
755
756 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
757 struct delayed_work *dwork,
758 unsigned long delay)
759 {
760 struct ieee80211_local *local = hw_to_local(hw);
761
762 if (!ieee80211_can_queue_work(local))
763 return;
764
765 queue_delayed_work(local->workqueue, dwork, delay);
766 }
767 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
768
769 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
770 struct ieee802_11_elems *elems,
771 u64 filter, u32 crc)
772 {
773 size_t left = len;
774 const u8 *pos = start;
775 bool calc_crc = filter != 0;
776 DECLARE_BITMAP(seen_elems, 256);
777 const u8 *ie;
778
779 bitmap_zero(seen_elems, 256);
780 memset(elems, 0, sizeof(*elems));
781 elems->ie_start = start;
782 elems->total_len = len;
783
784 while (left >= 2) {
785 u8 id, elen;
786 bool elem_parse_failed;
787
788 id = *pos++;
789 elen = *pos++;
790 left -= 2;
791
792 if (elen > left) {
793 elems->parse_error = true;
794 break;
795 }
796
797 switch (id) {
798 case WLAN_EID_SSID:
799 case WLAN_EID_SUPP_RATES:
800 case WLAN_EID_FH_PARAMS:
801 case WLAN_EID_DS_PARAMS:
802 case WLAN_EID_CF_PARAMS:
803 case WLAN_EID_TIM:
804 case WLAN_EID_IBSS_PARAMS:
805 case WLAN_EID_CHALLENGE:
806 case WLAN_EID_RSN:
807 case WLAN_EID_ERP_INFO:
808 case WLAN_EID_EXT_SUPP_RATES:
809 case WLAN_EID_HT_CAPABILITY:
810 case WLAN_EID_HT_OPERATION:
811 case WLAN_EID_VHT_CAPABILITY:
812 case WLAN_EID_VHT_OPERATION:
813 case WLAN_EID_MESH_ID:
814 case WLAN_EID_MESH_CONFIG:
815 case WLAN_EID_PEER_MGMT:
816 case WLAN_EID_PREQ:
817 case WLAN_EID_PREP:
818 case WLAN_EID_PERR:
819 case WLAN_EID_RANN:
820 case WLAN_EID_CHANNEL_SWITCH:
821 case WLAN_EID_EXT_CHANSWITCH_ANN:
822 case WLAN_EID_COUNTRY:
823 case WLAN_EID_PWR_CONSTRAINT:
824 case WLAN_EID_TIMEOUT_INTERVAL:
825 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
826 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
827 case WLAN_EID_CHAN_SWITCH_PARAM:
828 case WLAN_EID_EXT_CAPABILITY:
829 case WLAN_EID_CHAN_SWITCH_TIMING:
830 case WLAN_EID_LINK_ID:
831 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
832 /*
833 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
834 * that if the content gets bigger it might be needed more than once
835 */
836 if (test_bit(id, seen_elems)) {
837 elems->parse_error = true;
838 left -= elen;
839 pos += elen;
840 continue;
841 }
842 break;
843 }
844
845 if (calc_crc && id < 64 && (filter & (1ULL << id)))
846 crc = crc32_be(crc, pos - 2, elen + 2);
847
848 elem_parse_failed = false;
849
850 switch (id) {
851 case WLAN_EID_LINK_ID:
852 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
853 elem_parse_failed = true;
854 break;
855 }
856 elems->lnk_id = (void *)(pos - 2);
857 break;
858 case WLAN_EID_CHAN_SWITCH_TIMING:
859 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
860 elem_parse_failed = true;
861 break;
862 }
863 elems->ch_sw_timing = (void *)pos;
864 break;
865 case WLAN_EID_EXT_CAPABILITY:
866 elems->ext_capab = pos;
867 elems->ext_capab_len = elen;
868 break;
869 case WLAN_EID_SSID:
870 elems->ssid = pos;
871 elems->ssid_len = elen;
872 break;
873 case WLAN_EID_SUPP_RATES:
874 elems->supp_rates = pos;
875 elems->supp_rates_len = elen;
876 break;
877 case WLAN_EID_DS_PARAMS:
878 if (elen >= 1)
879 elems->ds_params = pos;
880 else
881 elem_parse_failed = true;
882 break;
883 case WLAN_EID_TIM:
884 if (elen >= sizeof(struct ieee80211_tim_ie)) {
885 elems->tim = (void *)pos;
886 elems->tim_len = elen;
887 } else
888 elem_parse_failed = true;
889 break;
890 case WLAN_EID_CHALLENGE:
891 elems->challenge = pos;
892 elems->challenge_len = elen;
893 break;
894 case WLAN_EID_VENDOR_SPECIFIC:
895 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
896 pos[2] == 0xf2) {
897 /* Microsoft OUI (00:50:F2) */
898
899 if (calc_crc)
900 crc = crc32_be(crc, pos - 2, elen + 2);
901
902 if (elen >= 5 && pos[3] == 2) {
903 /* OUI Type 2 - WMM IE */
904 if (pos[4] == 0) {
905 elems->wmm_info = pos;
906 elems->wmm_info_len = elen;
907 } else if (pos[4] == 1) {
908 elems->wmm_param = pos;
909 elems->wmm_param_len = elen;
910 }
911 }
912 }
913 break;
914 case WLAN_EID_RSN:
915 elems->rsn = pos;
916 elems->rsn_len = elen;
917 break;
918 case WLAN_EID_ERP_INFO:
919 if (elen >= 1)
920 elems->erp_info = pos;
921 else
922 elem_parse_failed = true;
923 break;
924 case WLAN_EID_EXT_SUPP_RATES:
925 elems->ext_supp_rates = pos;
926 elems->ext_supp_rates_len = elen;
927 break;
928 case WLAN_EID_HT_CAPABILITY:
929 if (elen >= sizeof(struct ieee80211_ht_cap))
930 elems->ht_cap_elem = (void *)pos;
931 else
932 elem_parse_failed = true;
933 break;
934 case WLAN_EID_HT_OPERATION:
935 if (elen >= sizeof(struct ieee80211_ht_operation))
936 elems->ht_operation = (void *)pos;
937 else
938 elem_parse_failed = true;
939 break;
940 case WLAN_EID_VHT_CAPABILITY:
941 if (elen >= sizeof(struct ieee80211_vht_cap))
942 elems->vht_cap_elem = (void *)pos;
943 else
944 elem_parse_failed = true;
945 break;
946 case WLAN_EID_VHT_OPERATION:
947 if (elen >= sizeof(struct ieee80211_vht_operation))
948 elems->vht_operation = (void *)pos;
949 else
950 elem_parse_failed = true;
951 break;
952 case WLAN_EID_OPMODE_NOTIF:
953 if (elen > 0)
954 elems->opmode_notif = pos;
955 else
956 elem_parse_failed = true;
957 break;
958 case WLAN_EID_MESH_ID:
959 elems->mesh_id = pos;
960 elems->mesh_id_len = elen;
961 break;
962 case WLAN_EID_MESH_CONFIG:
963 if (elen >= sizeof(struct ieee80211_meshconf_ie))
964 elems->mesh_config = (void *)pos;
965 else
966 elem_parse_failed = true;
967 break;
968 case WLAN_EID_PEER_MGMT:
969 elems->peering = pos;
970 elems->peering_len = elen;
971 break;
972 case WLAN_EID_MESH_AWAKE_WINDOW:
973 if (elen >= 2)
974 elems->awake_window = (void *)pos;
975 break;
976 case WLAN_EID_PREQ:
977 elems->preq = pos;
978 elems->preq_len = elen;
979 break;
980 case WLAN_EID_PREP:
981 elems->prep = pos;
982 elems->prep_len = elen;
983 break;
984 case WLAN_EID_PERR:
985 elems->perr = pos;
986 elems->perr_len = elen;
987 break;
988 case WLAN_EID_RANN:
989 if (elen >= sizeof(struct ieee80211_rann_ie))
990 elems->rann = (void *)pos;
991 else
992 elem_parse_failed = true;
993 break;
994 case WLAN_EID_CHANNEL_SWITCH:
995 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
996 elem_parse_failed = true;
997 break;
998 }
999 elems->ch_switch_ie = (void *)pos;
1000 break;
1001 case WLAN_EID_EXT_CHANSWITCH_ANN:
1002 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1003 elem_parse_failed = true;
1004 break;
1005 }
1006 elems->ext_chansw_ie = (void *)pos;
1007 break;
1008 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1009 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1010 elem_parse_failed = true;
1011 break;
1012 }
1013 elems->sec_chan_offs = (void *)pos;
1014 break;
1015 case WLAN_EID_CHAN_SWITCH_PARAM:
1016 if (elen !=
1017 sizeof(*elems->mesh_chansw_params_ie)) {
1018 elem_parse_failed = true;
1019 break;
1020 }
1021 elems->mesh_chansw_params_ie = (void *)pos;
1022 break;
1023 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1024 if (!action ||
1025 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1026 elem_parse_failed = true;
1027 break;
1028 }
1029 elems->wide_bw_chansw_ie = (void *)pos;
1030 break;
1031 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1032 if (action) {
1033 elem_parse_failed = true;
1034 break;
1035 }
1036 /*
1037 * This is a bit tricky, but as we only care about
1038 * the wide bandwidth channel switch element, so
1039 * just parse it out manually.
1040 */
1041 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1042 pos, elen);
1043 if (ie) {
1044 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1045 elems->wide_bw_chansw_ie =
1046 (void *)(ie + 2);
1047 else
1048 elem_parse_failed = true;
1049 }
1050 break;
1051 case WLAN_EID_COUNTRY:
1052 elems->country_elem = pos;
1053 elems->country_elem_len = elen;
1054 break;
1055 case WLAN_EID_PWR_CONSTRAINT:
1056 if (elen != 1) {
1057 elem_parse_failed = true;
1058 break;
1059 }
1060 elems->pwr_constr_elem = pos;
1061 break;
1062 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1063 /* Lots of different options exist, but we only care
1064 * about the Dynamic Transmit Power Control element.
1065 * First check for the Cisco OUI, then for the DTPC
1066 * tag (0x00).
1067 */
1068 if (elen < 4) {
1069 elem_parse_failed = true;
1070 break;
1071 }
1072
1073 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1074 pos[2] != 0x96 || pos[3] != 0x00)
1075 break;
1076
1077 if (elen != 6) {
1078 elem_parse_failed = true;
1079 break;
1080 }
1081
1082 if (calc_crc)
1083 crc = crc32_be(crc, pos - 2, elen + 2);
1084
1085 elems->cisco_dtpc_elem = pos;
1086 break;
1087 case WLAN_EID_TIMEOUT_INTERVAL:
1088 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1089 elems->timeout_int = (void *)pos;
1090 else
1091 elem_parse_failed = true;
1092 break;
1093 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1094 if (elen >= sizeof(*elems->max_idle_period_ie))
1095 elems->max_idle_period_ie = (void *)pos;
1096 break;
1097 default:
1098 break;
1099 }
1100
1101 if (elem_parse_failed)
1102 elems->parse_error = true;
1103 else
1104 __set_bit(id, seen_elems);
1105
1106 left -= elen;
1107 pos += elen;
1108 }
1109
1110 if (left != 0)
1111 elems->parse_error = true;
1112
1113 return crc;
1114 }
1115
1116 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1117 bool bss_notify, bool enable_qos)
1118 {
1119 struct ieee80211_local *local = sdata->local;
1120 struct ieee80211_tx_queue_params qparam;
1121 struct ieee80211_chanctx_conf *chanctx_conf;
1122 int ac;
1123 bool use_11b;
1124 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1125 int aCWmin, aCWmax;
1126
1127 if (!local->ops->conf_tx)
1128 return;
1129
1130 if (local->hw.queues < IEEE80211_NUM_ACS)
1131 return;
1132
1133 memset(&qparam, 0, sizeof(qparam));
1134
1135 rcu_read_lock();
1136 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1137 use_11b = (chanctx_conf &&
1138 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1139 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1140 rcu_read_unlock();
1141
1142 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1143
1144 /* Set defaults according to 802.11-2007 Table 7-37 */
1145 aCWmax = 1023;
1146 if (use_11b)
1147 aCWmin = 31;
1148 else
1149 aCWmin = 15;
1150
1151 /* Confiure old 802.11b/g medium access rules. */
1152 qparam.cw_max = aCWmax;
1153 qparam.cw_min = aCWmin;
1154 qparam.txop = 0;
1155 qparam.aifs = 2;
1156
1157 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1158 /* Update if QoS is enabled. */
1159 if (enable_qos) {
1160 switch (ac) {
1161 case IEEE80211_AC_BK:
1162 qparam.cw_max = aCWmax;
1163 qparam.cw_min = aCWmin;
1164 qparam.txop = 0;
1165 if (is_ocb)
1166 qparam.aifs = 9;
1167 else
1168 qparam.aifs = 7;
1169 break;
1170 /* never happens but let's not leave undefined */
1171 default:
1172 case IEEE80211_AC_BE:
1173 qparam.cw_max = aCWmax;
1174 qparam.cw_min = aCWmin;
1175 qparam.txop = 0;
1176 if (is_ocb)
1177 qparam.aifs = 6;
1178 else
1179 qparam.aifs = 3;
1180 break;
1181 case IEEE80211_AC_VI:
1182 qparam.cw_max = aCWmin;
1183 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1184 if (is_ocb)
1185 qparam.txop = 0;
1186 else if (use_11b)
1187 qparam.txop = 6016/32;
1188 else
1189 qparam.txop = 3008/32;
1190
1191 if (is_ocb)
1192 qparam.aifs = 3;
1193 else
1194 qparam.aifs = 2;
1195 break;
1196 case IEEE80211_AC_VO:
1197 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1198 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1199 if (is_ocb)
1200 qparam.txop = 0;
1201 else if (use_11b)
1202 qparam.txop = 3264/32;
1203 else
1204 qparam.txop = 1504/32;
1205 qparam.aifs = 2;
1206 break;
1207 }
1208 }
1209
1210 qparam.uapsd = false;
1211
1212 sdata->tx_conf[ac] = qparam;
1213 drv_conf_tx(local, sdata, ac, &qparam);
1214 }
1215
1216 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1217 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1218 sdata->vif.type != NL80211_IFTYPE_NAN) {
1219 sdata->vif.bss_conf.qos = enable_qos;
1220 if (bss_notify)
1221 ieee80211_bss_info_change_notify(sdata,
1222 BSS_CHANGED_QOS);
1223 }
1224 }
1225
1226 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1227 u16 transaction, u16 auth_alg, u16 status,
1228 const u8 *extra, size_t extra_len, const u8 *da,
1229 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1230 u32 tx_flags)
1231 {
1232 struct ieee80211_local *local = sdata->local;
1233 struct sk_buff *skb;
1234 struct ieee80211_mgmt *mgmt;
1235 int err;
1236
1237 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1238 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1239 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1240 if (!skb)
1241 return;
1242
1243 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1244
1245 mgmt = skb_put_zero(skb, 24 + 6);
1246 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1247 IEEE80211_STYPE_AUTH);
1248 memcpy(mgmt->da, da, ETH_ALEN);
1249 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1250 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1251 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1252 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1253 mgmt->u.auth.status_code = cpu_to_le16(status);
1254 if (extra)
1255 skb_put_data(skb, extra, extra_len);
1256
1257 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1258 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1259 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1260 WARN_ON(err);
1261 }
1262
1263 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1264 tx_flags;
1265 ieee80211_tx_skb(sdata, skb);
1266 }
1267
1268 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1269 const u8 *bssid, u16 stype, u16 reason,
1270 bool send_frame, u8 *frame_buf)
1271 {
1272 struct ieee80211_local *local = sdata->local;
1273 struct sk_buff *skb;
1274 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1275
1276 /* build frame */
1277 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1278 mgmt->duration = 0; /* initialize only */
1279 mgmt->seq_ctrl = 0; /* initialize only */
1280 memcpy(mgmt->da, bssid, ETH_ALEN);
1281 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1282 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1283 /* u.deauth.reason_code == u.disassoc.reason_code */
1284 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1285
1286 if (send_frame) {
1287 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1288 IEEE80211_DEAUTH_FRAME_LEN);
1289 if (!skb)
1290 return;
1291
1292 skb_reserve(skb, local->hw.extra_tx_headroom);
1293
1294 /* copy in frame */
1295 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1296
1297 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1298 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1299 IEEE80211_SKB_CB(skb)->flags |=
1300 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1301
1302 ieee80211_tx_skb(sdata, skb);
1303 }
1304 }
1305
1306 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1307 u8 *buffer, size_t buffer_len,
1308 const u8 *ie, size_t ie_len,
1309 enum nl80211_band band,
1310 u32 rate_mask,
1311 struct cfg80211_chan_def *chandef,
1312 size_t *offset)
1313 {
1314 struct ieee80211_supported_band *sband;
1315 u8 *pos = buffer, *end = buffer + buffer_len;
1316 size_t noffset;
1317 int supp_rates_len, i;
1318 u8 rates[32];
1319 int num_rates;
1320 int ext_rates_len;
1321 int shift;
1322 u32 rate_flags;
1323 bool have_80mhz = false;
1324
1325 *offset = 0;
1326
1327 sband = local->hw.wiphy->bands[band];
1328 if (WARN_ON_ONCE(!sband))
1329 return 0;
1330
1331 rate_flags = ieee80211_chandef_rate_flags(chandef);
1332 shift = ieee80211_chandef_get_shift(chandef);
1333
1334 num_rates = 0;
1335 for (i = 0; i < sband->n_bitrates; i++) {
1336 if ((BIT(i) & rate_mask) == 0)
1337 continue; /* skip rate */
1338 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1339 continue;
1340
1341 rates[num_rates++] =
1342 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1343 (1 << shift) * 5);
1344 }
1345
1346 supp_rates_len = min_t(int, num_rates, 8);
1347
1348 if (end - pos < 2 + supp_rates_len)
1349 goto out_err;
1350 *pos++ = WLAN_EID_SUPP_RATES;
1351 *pos++ = supp_rates_len;
1352 memcpy(pos, rates, supp_rates_len);
1353 pos += supp_rates_len;
1354
1355 /* insert "request information" if in custom IEs */
1356 if (ie && ie_len) {
1357 static const u8 before_extrates[] = {
1358 WLAN_EID_SSID,
1359 WLAN_EID_SUPP_RATES,
1360 WLAN_EID_REQUEST,
1361 };
1362 noffset = ieee80211_ie_split(ie, ie_len,
1363 before_extrates,
1364 ARRAY_SIZE(before_extrates),
1365 *offset);
1366 if (end - pos < noffset - *offset)
1367 goto out_err;
1368 memcpy(pos, ie + *offset, noffset - *offset);
1369 pos += noffset - *offset;
1370 *offset = noffset;
1371 }
1372
1373 ext_rates_len = num_rates - supp_rates_len;
1374 if (ext_rates_len > 0) {
1375 if (end - pos < 2 + ext_rates_len)
1376 goto out_err;
1377 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1378 *pos++ = ext_rates_len;
1379 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1380 pos += ext_rates_len;
1381 }
1382
1383 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1384 if (end - pos < 3)
1385 goto out_err;
1386 *pos++ = WLAN_EID_DS_PARAMS;
1387 *pos++ = 1;
1388 *pos++ = ieee80211_frequency_to_channel(
1389 chandef->chan->center_freq);
1390 }
1391
1392 /* insert custom IEs that go before HT */
1393 if (ie && ie_len) {
1394 static const u8 before_ht[] = {
1395 /*
1396 * no need to list the ones split off already
1397 * (or generated here)
1398 */
1399 WLAN_EID_DS_PARAMS,
1400 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1401 };
1402 noffset = ieee80211_ie_split(ie, ie_len,
1403 before_ht, ARRAY_SIZE(before_ht),
1404 *offset);
1405 if (end - pos < noffset - *offset)
1406 goto out_err;
1407 memcpy(pos, ie + *offset, noffset - *offset);
1408 pos += noffset - *offset;
1409 *offset = noffset;
1410 }
1411
1412 if (sband->ht_cap.ht_supported) {
1413 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1414 goto out_err;
1415 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1416 sband->ht_cap.cap);
1417 }
1418
1419 /*
1420 * If adding more here, adjust code in main.c
1421 * that calculates local->scan_ies_len.
1422 */
1423
1424 /* insert custom IEs that go before VHT */
1425 if (ie && ie_len) {
1426 static const u8 before_vht[] = {
1427 /*
1428 * no need to list the ones split off already
1429 * (or generated here)
1430 */
1431 WLAN_EID_BSS_COEX_2040,
1432 WLAN_EID_EXT_CAPABILITY,
1433 WLAN_EID_SSID_LIST,
1434 WLAN_EID_CHANNEL_USAGE,
1435 WLAN_EID_INTERWORKING,
1436 WLAN_EID_MESH_ID,
1437 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1438 };
1439 noffset = ieee80211_ie_split(ie, ie_len,
1440 before_vht, ARRAY_SIZE(before_vht),
1441 *offset);
1442 if (end - pos < noffset - *offset)
1443 goto out_err;
1444 memcpy(pos, ie + *offset, noffset - *offset);
1445 pos += noffset - *offset;
1446 *offset = noffset;
1447 }
1448
1449 /* Check if any channel in this sband supports at least 80 MHz */
1450 for (i = 0; i < sband->n_channels; i++) {
1451 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1452 IEEE80211_CHAN_NO_80MHZ))
1453 continue;
1454
1455 have_80mhz = true;
1456 break;
1457 }
1458
1459 if (sband->vht_cap.vht_supported && have_80mhz) {
1460 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1461 goto out_err;
1462 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1463 sband->vht_cap.cap);
1464 }
1465
1466 return pos - buffer;
1467 out_err:
1468 WARN_ONCE(1, "not enough space for preq IEs\n");
1469 return pos - buffer;
1470 }
1471
1472 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1473 size_t buffer_len,
1474 struct ieee80211_scan_ies *ie_desc,
1475 const u8 *ie, size_t ie_len,
1476 u8 bands_used, u32 *rate_masks,
1477 struct cfg80211_chan_def *chandef)
1478 {
1479 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1480 int i;
1481
1482 memset(ie_desc, 0, sizeof(*ie_desc));
1483
1484 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1485 if (bands_used & BIT(i)) {
1486 pos += ieee80211_build_preq_ies_band(local,
1487 buffer + pos,
1488 buffer_len - pos,
1489 ie, ie_len, i,
1490 rate_masks[i],
1491 chandef,
1492 &custom_ie_offset);
1493 ie_desc->ies[i] = buffer + old_pos;
1494 ie_desc->len[i] = pos - old_pos;
1495 old_pos = pos;
1496 }
1497 }
1498
1499 /* add any remaining custom IEs */
1500 if (ie && ie_len) {
1501 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1502 "not enough space for preq custom IEs\n"))
1503 return pos;
1504 memcpy(buffer + pos, ie + custom_ie_offset,
1505 ie_len - custom_ie_offset);
1506 ie_desc->common_ies = buffer + pos;
1507 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1508 pos += ie_len - custom_ie_offset;
1509 }
1510
1511 return pos;
1512 };
1513
1514 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1515 const u8 *src, const u8 *dst,
1516 u32 ratemask,
1517 struct ieee80211_channel *chan,
1518 const u8 *ssid, size_t ssid_len,
1519 const u8 *ie, size_t ie_len,
1520 bool directed)
1521 {
1522 struct ieee80211_local *local = sdata->local;
1523 struct cfg80211_chan_def chandef;
1524 struct sk_buff *skb;
1525 struct ieee80211_mgmt *mgmt;
1526 int ies_len;
1527 u32 rate_masks[NUM_NL80211_BANDS] = {};
1528 struct ieee80211_scan_ies dummy_ie_desc;
1529
1530 /*
1531 * Do not send DS Channel parameter for directed probe requests
1532 * in order to maximize the chance that we get a response. Some
1533 * badly-behaved APs don't respond when this parameter is included.
1534 */
1535 chandef.width = sdata->vif.bss_conf.chandef.width;
1536 if (directed)
1537 chandef.chan = NULL;
1538 else
1539 chandef.chan = chan;
1540
1541 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1542 100 + ie_len);
1543 if (!skb)
1544 return NULL;
1545
1546 rate_masks[chan->band] = ratemask;
1547 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1548 skb_tailroom(skb), &dummy_ie_desc,
1549 ie, ie_len, BIT(chan->band),
1550 rate_masks, &chandef);
1551 skb_put(skb, ies_len);
1552
1553 if (dst) {
1554 mgmt = (struct ieee80211_mgmt *) skb->data;
1555 memcpy(mgmt->da, dst, ETH_ALEN);
1556 memcpy(mgmt->bssid, dst, ETH_ALEN);
1557 }
1558
1559 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1560
1561 return skb;
1562 }
1563
1564 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1565 const u8 *src, const u8 *dst,
1566 const u8 *ssid, size_t ssid_len,
1567 const u8 *ie, size_t ie_len,
1568 u32 ratemask, bool directed, u32 tx_flags,
1569 struct ieee80211_channel *channel, bool scan)
1570 {
1571 struct sk_buff *skb;
1572
1573 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1574 ssid, ssid_len,
1575 ie, ie_len, directed);
1576 if (skb) {
1577 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1578 if (scan)
1579 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1580 else
1581 ieee80211_tx_skb(sdata, skb);
1582 }
1583 }
1584
1585 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1586 struct ieee802_11_elems *elems,
1587 enum nl80211_band band, u32 *basic_rates)
1588 {
1589 struct ieee80211_supported_band *sband;
1590 size_t num_rates;
1591 u32 supp_rates, rate_flags;
1592 int i, j, shift;
1593
1594 sband = sdata->local->hw.wiphy->bands[band];
1595 if (WARN_ON(!sband))
1596 return 1;
1597
1598 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1599 shift = ieee80211_vif_get_shift(&sdata->vif);
1600
1601 num_rates = sband->n_bitrates;
1602 supp_rates = 0;
1603 for (i = 0; i < elems->supp_rates_len +
1604 elems->ext_supp_rates_len; i++) {
1605 u8 rate = 0;
1606 int own_rate;
1607 bool is_basic;
1608 if (i < elems->supp_rates_len)
1609 rate = elems->supp_rates[i];
1610 else if (elems->ext_supp_rates)
1611 rate = elems->ext_supp_rates
1612 [i - elems->supp_rates_len];
1613 own_rate = 5 * (rate & 0x7f);
1614 is_basic = !!(rate & 0x80);
1615
1616 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1617 continue;
1618
1619 for (j = 0; j < num_rates; j++) {
1620 int brate;
1621 if ((rate_flags & sband->bitrates[j].flags)
1622 != rate_flags)
1623 continue;
1624
1625 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1626 1 << shift);
1627
1628 if (brate == own_rate) {
1629 supp_rates |= BIT(j);
1630 if (basic_rates && is_basic)
1631 *basic_rates |= BIT(j);
1632 }
1633 }
1634 }
1635 return supp_rates;
1636 }
1637
1638 void ieee80211_stop_device(struct ieee80211_local *local)
1639 {
1640 ieee80211_led_radio(local, false);
1641 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1642
1643 cancel_work_sync(&local->reconfig_filter);
1644
1645 flush_workqueue(local->workqueue);
1646 drv_stop(local);
1647 }
1648
1649 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1650 bool aborted)
1651 {
1652 /* It's possible that we don't handle the scan completion in
1653 * time during suspend, so if it's still marked as completed
1654 * here, queue the work and flush it to clean things up.
1655 * Instead of calling the worker function directly here, we
1656 * really queue it to avoid potential races with other flows
1657 * scheduling the same work.
1658 */
1659 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1660 /* If coming from reconfiguration failure, abort the scan so
1661 * we don't attempt to continue a partial HW scan - which is
1662 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1663 * completed scan, and a 5 GHz portion is still pending.
1664 */
1665 if (aborted)
1666 set_bit(SCAN_ABORTED, &local->scanning);
1667 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1668 flush_delayed_work(&local->scan_work);
1669 }
1670 }
1671
1672 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1673 {
1674 struct ieee80211_sub_if_data *sdata;
1675 struct ieee80211_chanctx *ctx;
1676
1677 /*
1678 * We get here if during resume the device can't be restarted properly.
1679 * We might also get here if this happens during HW reset, which is a
1680 * slightly different situation and we need to drop all connections in
1681 * the latter case.
1682 *
1683 * Ask cfg80211 to turn off all interfaces, this will result in more
1684 * warnings but at least we'll then get into a clean stopped state.
1685 */
1686
1687 local->resuming = false;
1688 local->suspended = false;
1689 local->in_reconfig = false;
1690
1691 ieee80211_flush_completed_scan(local, true);
1692
1693 /* scheduled scan clearly can't be running any more, but tell
1694 * cfg80211 and clear local state
1695 */
1696 ieee80211_sched_scan_end(local);
1697
1698 list_for_each_entry(sdata, &local->interfaces, list)
1699 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1700
1701 /* Mark channel contexts as not being in the driver any more to avoid
1702 * removing them from the driver during the shutdown process...
1703 */
1704 mutex_lock(&local->chanctx_mtx);
1705 list_for_each_entry(ctx, &local->chanctx_list, list)
1706 ctx->driver_present = false;
1707 mutex_unlock(&local->chanctx_mtx);
1708
1709 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1710 }
1711
1712 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1713 struct ieee80211_sub_if_data *sdata)
1714 {
1715 struct ieee80211_chanctx_conf *conf;
1716 struct ieee80211_chanctx *ctx;
1717
1718 if (!local->use_chanctx)
1719 return;
1720
1721 mutex_lock(&local->chanctx_mtx);
1722 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1723 lockdep_is_held(&local->chanctx_mtx));
1724 if (conf) {
1725 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1726 drv_assign_vif_chanctx(local, sdata, ctx);
1727 }
1728 mutex_unlock(&local->chanctx_mtx);
1729 }
1730
1731 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1732 {
1733 struct ieee80211_local *local = sdata->local;
1734 struct sta_info *sta;
1735
1736 /* add STAs back */
1737 mutex_lock(&local->sta_mtx);
1738 list_for_each_entry(sta, &local->sta_list, list) {
1739 enum ieee80211_sta_state state;
1740
1741 if (!sta->uploaded || sta->sdata != sdata)
1742 continue;
1743
1744 for (state = IEEE80211_STA_NOTEXIST;
1745 state < sta->sta_state; state++)
1746 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1747 state + 1));
1748 }
1749 mutex_unlock(&local->sta_mtx);
1750 }
1751
1752 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1753 {
1754 struct cfg80211_nan_func *func, **funcs;
1755 int res, id, i = 0;
1756
1757 res = drv_start_nan(sdata->local, sdata,
1758 &sdata->u.nan.conf);
1759 if (WARN_ON(res))
1760 return res;
1761
1762 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1763 sizeof(*funcs), GFP_KERNEL);
1764 if (!funcs)
1765 return -ENOMEM;
1766
1767 /* Add all the functions:
1768 * This is a little bit ugly. We need to call a potentially sleeping
1769 * callback for each NAN function, so we can't hold the spinlock.
1770 */
1771 spin_lock_bh(&sdata->u.nan.func_lock);
1772
1773 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1774 funcs[i++] = func;
1775
1776 spin_unlock_bh(&sdata->u.nan.func_lock);
1777
1778 for (i = 0; funcs[i]; i++) {
1779 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1780 if (WARN_ON(res))
1781 ieee80211_nan_func_terminated(&sdata->vif,
1782 funcs[i]->instance_id,
1783 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1784 GFP_KERNEL);
1785 }
1786
1787 kfree(funcs);
1788
1789 return 0;
1790 }
1791
1792 int ieee80211_reconfig(struct ieee80211_local *local)
1793 {
1794 struct ieee80211_hw *hw = &local->hw;
1795 struct ieee80211_sub_if_data *sdata;
1796 struct ieee80211_chanctx *ctx;
1797 struct sta_info *sta;
1798 int res, i;
1799 bool reconfig_due_to_wowlan = false;
1800 struct ieee80211_sub_if_data *sched_scan_sdata;
1801 struct cfg80211_sched_scan_request *sched_scan_req;
1802 bool sched_scan_stopped = false;
1803 bool suspended = local->suspended;
1804
1805 /* nothing to do if HW shouldn't run */
1806 if (!local->open_count)
1807 goto wake_up;
1808
1809 #ifdef CONFIG_PM
1810 if (suspended)
1811 local->resuming = true;
1812
1813 if (local->wowlan) {
1814 /*
1815 * In the wowlan case, both mac80211 and the device
1816 * are functional when the resume op is called, so
1817 * clear local->suspended so the device could operate
1818 * normally (e.g. pass rx frames).
1819 */
1820 local->suspended = false;
1821 res = drv_resume(local);
1822 local->wowlan = false;
1823 if (res < 0) {
1824 local->resuming = false;
1825 return res;
1826 }
1827 if (res == 0)
1828 goto wake_up;
1829 WARN_ON(res > 1);
1830 /*
1831 * res is 1, which means the driver requested
1832 * to go through a regular reset on wakeup.
1833 * restore local->suspended in this case.
1834 */
1835 reconfig_due_to_wowlan = true;
1836 local->suspended = true;
1837 }
1838 #endif
1839
1840 /*
1841 * In case of hw_restart during suspend (without wowlan),
1842 * cancel restart work, as we are reconfiguring the device
1843 * anyway.
1844 * Note that restart_work is scheduled on a frozen workqueue,
1845 * so we can't deadlock in this case.
1846 */
1847 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1848 cancel_work_sync(&local->restart_work);
1849
1850 local->started = false;
1851
1852 /*
1853 * Upon resume hardware can sometimes be goofy due to
1854 * various platform / driver / bus issues, so restarting
1855 * the device may at times not work immediately. Propagate
1856 * the error.
1857 */
1858 res = drv_start(local);
1859 if (res) {
1860 if (suspended)
1861 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1862 else
1863 WARN(1, "Hardware became unavailable during restart.\n");
1864 ieee80211_handle_reconfig_failure(local);
1865 return res;
1866 }
1867
1868 /* setup fragmentation threshold */
1869 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1870
1871 /* setup RTS threshold */
1872 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1873
1874 /* reset coverage class */
1875 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1876
1877 ieee80211_led_radio(local, true);
1878 ieee80211_mod_tpt_led_trig(local,
1879 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1880
1881 /* add interfaces */
1882 sdata = rtnl_dereference(local->monitor_sdata);
1883 if (sdata) {
1884 /* in HW restart it exists already */
1885 WARN_ON(local->resuming);
1886 res = drv_add_interface(local, sdata);
1887 if (WARN_ON(res)) {
1888 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1889 synchronize_net();
1890 kfree(sdata);
1891 }
1892 }
1893
1894 list_for_each_entry(sdata, &local->interfaces, list) {
1895 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1896 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1897 ieee80211_sdata_running(sdata)) {
1898 res = drv_add_interface(local, sdata);
1899 if (WARN_ON(res))
1900 break;
1901 }
1902 }
1903
1904 /* If adding any of the interfaces failed above, roll back and
1905 * report failure.
1906 */
1907 if (res) {
1908 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1909 list)
1910 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1911 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1912 ieee80211_sdata_running(sdata))
1913 drv_remove_interface(local, sdata);
1914 ieee80211_handle_reconfig_failure(local);
1915 return res;
1916 }
1917
1918 /* add channel contexts */
1919 if (local->use_chanctx) {
1920 mutex_lock(&local->chanctx_mtx);
1921 list_for_each_entry(ctx, &local->chanctx_list, list)
1922 if (ctx->replace_state !=
1923 IEEE80211_CHANCTX_REPLACES_OTHER)
1924 WARN_ON(drv_add_chanctx(local, ctx));
1925 mutex_unlock(&local->chanctx_mtx);
1926
1927 sdata = rtnl_dereference(local->monitor_sdata);
1928 if (sdata && ieee80211_sdata_running(sdata))
1929 ieee80211_assign_chanctx(local, sdata);
1930 }
1931
1932 /* reconfigure hardware */
1933 ieee80211_hw_config(local, ~0);
1934
1935 ieee80211_configure_filter(local);
1936
1937 /* Finally also reconfigure all the BSS information */
1938 list_for_each_entry(sdata, &local->interfaces, list) {
1939 u32 changed;
1940
1941 if (!ieee80211_sdata_running(sdata))
1942 continue;
1943
1944 ieee80211_assign_chanctx(local, sdata);
1945
1946 switch (sdata->vif.type) {
1947 case NL80211_IFTYPE_AP_VLAN:
1948 case NL80211_IFTYPE_MONITOR:
1949 break;
1950 default:
1951 ieee80211_reconfig_stations(sdata);
1952 /* fall through */
1953 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1954 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1955 drv_conf_tx(local, sdata, i,
1956 &sdata->tx_conf[i]);
1957 break;
1958 }
1959
1960 /* common change flags for all interface types */
1961 changed = BSS_CHANGED_ERP_CTS_PROT |
1962 BSS_CHANGED_ERP_PREAMBLE |
1963 BSS_CHANGED_ERP_SLOT |
1964 BSS_CHANGED_HT |
1965 BSS_CHANGED_BASIC_RATES |
1966 BSS_CHANGED_BEACON_INT |
1967 BSS_CHANGED_BSSID |
1968 BSS_CHANGED_CQM |
1969 BSS_CHANGED_QOS |
1970 BSS_CHANGED_IDLE |
1971 BSS_CHANGED_TXPOWER;
1972
1973 if (sdata->vif.mu_mimo_owner)
1974 changed |= BSS_CHANGED_MU_GROUPS;
1975
1976 switch (sdata->vif.type) {
1977 case NL80211_IFTYPE_STATION:
1978 changed |= BSS_CHANGED_ASSOC |
1979 BSS_CHANGED_ARP_FILTER |
1980 BSS_CHANGED_PS;
1981
1982 /* Re-send beacon info report to the driver */
1983 if (sdata->u.mgd.have_beacon)
1984 changed |= BSS_CHANGED_BEACON_INFO;
1985
1986 if (sdata->vif.bss_conf.max_idle_period ||
1987 sdata->vif.bss_conf.protected_keep_alive)
1988 changed |= BSS_CHANGED_KEEP_ALIVE;
1989
1990 sdata_lock(sdata);
1991 ieee80211_bss_info_change_notify(sdata, changed);
1992 sdata_unlock(sdata);
1993 break;
1994 case NL80211_IFTYPE_OCB:
1995 changed |= BSS_CHANGED_OCB;
1996 ieee80211_bss_info_change_notify(sdata, changed);
1997 break;
1998 case NL80211_IFTYPE_ADHOC:
1999 changed |= BSS_CHANGED_IBSS;
2000 /* fall through */
2001 case NL80211_IFTYPE_AP:
2002 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2003
2004 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2005 changed |= BSS_CHANGED_AP_PROBE_RESP;
2006
2007 if (rcu_access_pointer(sdata->u.ap.beacon))
2008 drv_start_ap(local, sdata);
2009 }
2010
2011 /* fall through */
2012 case NL80211_IFTYPE_MESH_POINT:
2013 if (sdata->vif.bss_conf.enable_beacon) {
2014 changed |= BSS_CHANGED_BEACON |
2015 BSS_CHANGED_BEACON_ENABLED;
2016 ieee80211_bss_info_change_notify(sdata, changed);
2017 }
2018 break;
2019 case NL80211_IFTYPE_NAN:
2020 res = ieee80211_reconfig_nan(sdata);
2021 if (res < 0) {
2022 ieee80211_handle_reconfig_failure(local);
2023 return res;
2024 }
2025 break;
2026 case NL80211_IFTYPE_WDS:
2027 case NL80211_IFTYPE_AP_VLAN:
2028 case NL80211_IFTYPE_MONITOR:
2029 case NL80211_IFTYPE_P2P_DEVICE:
2030 /* nothing to do */
2031 break;
2032 case NL80211_IFTYPE_UNSPECIFIED:
2033 case NUM_NL80211_IFTYPES:
2034 case NL80211_IFTYPE_P2P_CLIENT:
2035 case NL80211_IFTYPE_P2P_GO:
2036 WARN_ON(1);
2037 break;
2038 }
2039 }
2040
2041 ieee80211_recalc_ps(local);
2042
2043 /*
2044 * The sta might be in psm against the ap (e.g. because
2045 * this was the state before a hw restart), so we
2046 * explicitly send a null packet in order to make sure
2047 * it'll sync against the ap (and get out of psm).
2048 */
2049 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2050 list_for_each_entry(sdata, &local->interfaces, list) {
2051 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2052 continue;
2053 if (!sdata->u.mgd.associated)
2054 continue;
2055
2056 ieee80211_send_nullfunc(local, sdata, false);
2057 }
2058 }
2059
2060 /* APs are now beaconing, add back stations */
2061 mutex_lock(&local->sta_mtx);
2062 list_for_each_entry(sta, &local->sta_list, list) {
2063 enum ieee80211_sta_state state;
2064
2065 if (!sta->uploaded)
2066 continue;
2067
2068 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2069 continue;
2070
2071 for (state = IEEE80211_STA_NOTEXIST;
2072 state < sta->sta_state; state++)
2073 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2074 state + 1));
2075 }
2076 mutex_unlock(&local->sta_mtx);
2077
2078 /* add back keys */
2079 list_for_each_entry(sdata, &local->interfaces, list)
2080 ieee80211_reset_crypto_tx_tailroom(sdata);
2081
2082 list_for_each_entry(sdata, &local->interfaces, list)
2083 if (ieee80211_sdata_running(sdata))
2084 ieee80211_enable_keys(sdata);
2085
2086 /* Reconfigure sched scan if it was interrupted by FW restart */
2087 mutex_lock(&local->mtx);
2088 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2089 lockdep_is_held(&local->mtx));
2090 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2091 lockdep_is_held(&local->mtx));
2092 if (sched_scan_sdata && sched_scan_req)
2093 /*
2094 * Sched scan stopped, but we don't want to report it. Instead,
2095 * we're trying to reschedule. However, if more than one scan
2096 * plan was set, we cannot reschedule since we don't know which
2097 * scan plan was currently running (and some scan plans may have
2098 * already finished).
2099 */
2100 if (sched_scan_req->n_scan_plans > 1 ||
2101 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2102 sched_scan_req)) {
2103 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2104 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2105 sched_scan_stopped = true;
2106 }
2107 mutex_unlock(&local->mtx);
2108
2109 if (sched_scan_stopped)
2110 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2111
2112 wake_up:
2113
2114 if (local->monitors == local->open_count && local->monitors > 0)
2115 ieee80211_add_virtual_monitor(local);
2116
2117 /*
2118 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2119 * sessions can be established after a resume.
2120 *
2121 * Also tear down aggregation sessions since reconfiguring
2122 * them in a hardware restart scenario is not easily done
2123 * right now, and the hardware will have lost information
2124 * about the sessions, but we and the AP still think they
2125 * are active. This is really a workaround though.
2126 */
2127 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2128 mutex_lock(&local->sta_mtx);
2129
2130 list_for_each_entry(sta, &local->sta_list, list) {
2131 if (!local->resuming)
2132 ieee80211_sta_tear_down_BA_sessions(
2133 sta, AGG_STOP_LOCAL_REQUEST);
2134 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2135 }
2136
2137 mutex_unlock(&local->sta_mtx);
2138 }
2139
2140 if (local->in_reconfig) {
2141 local->in_reconfig = false;
2142 barrier();
2143
2144 /* Restart deferred ROCs */
2145 mutex_lock(&local->mtx);
2146 ieee80211_start_next_roc(local);
2147 mutex_unlock(&local->mtx);
2148 }
2149
2150 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2151 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2152 false);
2153
2154 /*
2155 * If this is for hw restart things are still running.
2156 * We may want to change that later, however.
2157 */
2158 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2159 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2160
2161 if (!suspended)
2162 return 0;
2163
2164 #ifdef CONFIG_PM
2165 /* first set suspended false, then resuming */
2166 local->suspended = false;
2167 mb();
2168 local->resuming = false;
2169
2170 ieee80211_flush_completed_scan(local, false);
2171
2172 if (local->open_count && !reconfig_due_to_wowlan)
2173 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2174
2175 list_for_each_entry(sdata, &local->interfaces, list) {
2176 if (!ieee80211_sdata_running(sdata))
2177 continue;
2178 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2179 ieee80211_sta_restart(sdata);
2180 }
2181
2182 mod_timer(&local->sta_cleanup, jiffies + 1);
2183 #else
2184 WARN_ON(1);
2185 #endif
2186
2187 return 0;
2188 }
2189
2190 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2191 {
2192 struct ieee80211_sub_if_data *sdata;
2193 struct ieee80211_local *local;
2194 struct ieee80211_key *key;
2195
2196 if (WARN_ON(!vif))
2197 return;
2198
2199 sdata = vif_to_sdata(vif);
2200 local = sdata->local;
2201
2202 if (WARN_ON(!local->resuming))
2203 return;
2204
2205 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2206 return;
2207
2208 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2209
2210 mutex_lock(&local->key_mtx);
2211 list_for_each_entry(key, &sdata->key_list, list)
2212 key->flags |= KEY_FLAG_TAINTED;
2213 mutex_unlock(&local->key_mtx);
2214 }
2215 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2216
2217 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2218 {
2219 struct ieee80211_local *local = sdata->local;
2220 struct ieee80211_chanctx_conf *chanctx_conf;
2221 struct ieee80211_chanctx *chanctx;
2222
2223 mutex_lock(&local->chanctx_mtx);
2224
2225 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2226 lockdep_is_held(&local->chanctx_mtx));
2227
2228 /*
2229 * This function can be called from a work, thus it may be possible
2230 * that the chanctx_conf is removed (due to a disconnection, for
2231 * example).
2232 * So nothing should be done in such case.
2233 */
2234 if (!chanctx_conf)
2235 goto unlock;
2236
2237 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2238 ieee80211_recalc_smps_chanctx(local, chanctx);
2239 unlock:
2240 mutex_unlock(&local->chanctx_mtx);
2241 }
2242
2243 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2244 {
2245 struct ieee80211_local *local = sdata->local;
2246 struct ieee80211_chanctx_conf *chanctx_conf;
2247 struct ieee80211_chanctx *chanctx;
2248
2249 mutex_lock(&local->chanctx_mtx);
2250
2251 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2252 lockdep_is_held(&local->chanctx_mtx));
2253
2254 if (WARN_ON_ONCE(!chanctx_conf))
2255 goto unlock;
2256
2257 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2258 ieee80211_recalc_chanctx_min_def(local, chanctx);
2259 unlock:
2260 mutex_unlock(&local->chanctx_mtx);
2261 }
2262
2263 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2264 {
2265 size_t pos = offset;
2266
2267 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2268 pos += 2 + ies[pos + 1];
2269
2270 return pos;
2271 }
2272
2273 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2274 int rssi_min_thold,
2275 int rssi_max_thold)
2276 {
2277 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2278
2279 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2280 return;
2281
2282 /*
2283 * Scale up threshold values before storing it, as the RSSI averaging
2284 * algorithm uses a scaled up value as well. Change this scaling
2285 * factor if the RSSI averaging algorithm changes.
2286 */
2287 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2288 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2289 }
2290
2291 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2292 int rssi_min_thold,
2293 int rssi_max_thold)
2294 {
2295 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2296
2297 WARN_ON(rssi_min_thold == rssi_max_thold ||
2298 rssi_min_thold > rssi_max_thold);
2299
2300 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2301 rssi_max_thold);
2302 }
2303 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2304
2305 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2306 {
2307 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2308
2309 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2310 }
2311 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2312
2313 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2314 u16 cap)
2315 {
2316 __le16 tmp;
2317
2318 *pos++ = WLAN_EID_HT_CAPABILITY;
2319 *pos++ = sizeof(struct ieee80211_ht_cap);
2320 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2321
2322 /* capability flags */
2323 tmp = cpu_to_le16(cap);
2324 memcpy(pos, &tmp, sizeof(u16));
2325 pos += sizeof(u16);
2326
2327 /* AMPDU parameters */
2328 *pos++ = ht_cap->ampdu_factor |
2329 (ht_cap->ampdu_density <<
2330 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2331
2332 /* MCS set */
2333 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2334 pos += sizeof(ht_cap->mcs);
2335
2336 /* extended capabilities */
2337 pos += sizeof(__le16);
2338
2339 /* BF capabilities */
2340 pos += sizeof(__le32);
2341
2342 /* antenna selection */
2343 pos += sizeof(u8);
2344
2345 return pos;
2346 }
2347
2348 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2349 u32 cap)
2350 {
2351 __le32 tmp;
2352
2353 *pos++ = WLAN_EID_VHT_CAPABILITY;
2354 *pos++ = sizeof(struct ieee80211_vht_cap);
2355 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2356
2357 /* capability flags */
2358 tmp = cpu_to_le32(cap);
2359 memcpy(pos, &tmp, sizeof(u32));
2360 pos += sizeof(u32);
2361
2362 /* VHT MCS set */
2363 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2364 pos += sizeof(vht_cap->vht_mcs);
2365
2366 return pos;
2367 }
2368
2369 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2370 const struct cfg80211_chan_def *chandef,
2371 u16 prot_mode, bool rifs_mode)
2372 {
2373 struct ieee80211_ht_operation *ht_oper;
2374 /* Build HT Information */
2375 *pos++ = WLAN_EID_HT_OPERATION;
2376 *pos++ = sizeof(struct ieee80211_ht_operation);
2377 ht_oper = (struct ieee80211_ht_operation *)pos;
2378 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2379 chandef->chan->center_freq);
2380 switch (chandef->width) {
2381 case NL80211_CHAN_WIDTH_160:
2382 case NL80211_CHAN_WIDTH_80P80:
2383 case NL80211_CHAN_WIDTH_80:
2384 case NL80211_CHAN_WIDTH_40:
2385 if (chandef->center_freq1 > chandef->chan->center_freq)
2386 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2387 else
2388 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2389 break;
2390 default:
2391 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2392 break;
2393 }
2394 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2395 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2396 chandef->width != NL80211_CHAN_WIDTH_20)
2397 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2398
2399 if (rifs_mode)
2400 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2401
2402 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2403 ht_oper->stbc_param = 0x0000;
2404
2405 /* It seems that Basic MCS set and Supported MCS set
2406 are identical for the first 10 bytes */
2407 memset(&ht_oper->basic_set, 0, 16);
2408 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2409
2410 return pos + sizeof(struct ieee80211_ht_operation);
2411 }
2412
2413 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2414 const struct cfg80211_chan_def *chandef)
2415 {
2416 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2417 *pos++ = 3; /* IE length */
2418 /* New channel width */
2419 switch (chandef->width) {
2420 case NL80211_CHAN_WIDTH_80:
2421 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2422 break;
2423 case NL80211_CHAN_WIDTH_160:
2424 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2425 break;
2426 case NL80211_CHAN_WIDTH_80P80:
2427 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2428 break;
2429 default:
2430 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2431 }
2432
2433 /* new center frequency segment 0 */
2434 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2435 /* new center frequency segment 1 */
2436 if (chandef->center_freq2)
2437 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2438 else
2439 *pos++ = 0;
2440 }
2441
2442 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2443 const struct cfg80211_chan_def *chandef)
2444 {
2445 struct ieee80211_vht_operation *vht_oper;
2446
2447 *pos++ = WLAN_EID_VHT_OPERATION;
2448 *pos++ = sizeof(struct ieee80211_vht_operation);
2449 vht_oper = (struct ieee80211_vht_operation *)pos;
2450 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2451 chandef->center_freq1);
2452 if (chandef->center_freq2)
2453 vht_oper->center_freq_seg1_idx =
2454 ieee80211_frequency_to_channel(chandef->center_freq2);
2455 else
2456 vht_oper->center_freq_seg1_idx = 0x00;
2457
2458 switch (chandef->width) {
2459 case NL80211_CHAN_WIDTH_160:
2460 /*
2461 * Convert 160 MHz channel width to new style as interop
2462 * workaround.
2463 */
2464 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2465 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2466 if (chandef->chan->center_freq < chandef->center_freq1)
2467 vht_oper->center_freq_seg0_idx -= 8;
2468 else
2469 vht_oper->center_freq_seg0_idx += 8;
2470 break;
2471 case NL80211_CHAN_WIDTH_80P80:
2472 /*
2473 * Convert 80+80 MHz channel width to new style as interop
2474 * workaround.
2475 */
2476 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2477 break;
2478 case NL80211_CHAN_WIDTH_80:
2479 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2480 break;
2481 default:
2482 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2483 break;
2484 }
2485
2486 /* don't require special VHT peer rates */
2487 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2488
2489 return pos + sizeof(struct ieee80211_vht_operation);
2490 }
2491
2492 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2493 struct cfg80211_chan_def *chandef)
2494 {
2495 enum nl80211_channel_type channel_type;
2496
2497 if (!ht_oper)
2498 return false;
2499
2500 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2501 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2502 channel_type = NL80211_CHAN_HT20;
2503 break;
2504 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2505 channel_type = NL80211_CHAN_HT40PLUS;
2506 break;
2507 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2508 channel_type = NL80211_CHAN_HT40MINUS;
2509 break;
2510 default:
2511 channel_type = NL80211_CHAN_NO_HT;
2512 return false;
2513 }
2514
2515 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2516 return true;
2517 }
2518
2519 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2520 struct cfg80211_chan_def *chandef)
2521 {
2522 struct cfg80211_chan_def new = *chandef;
2523 int cf1, cf2;
2524
2525 if (!oper)
2526 return false;
2527
2528 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2529 chandef->chan->band);
2530 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2531 chandef->chan->band);
2532
2533 switch (oper->chan_width) {
2534 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2535 break;
2536 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2537 new.width = NL80211_CHAN_WIDTH_80;
2538 new.center_freq1 = cf1;
2539 /* If needed, adjust based on the newer interop workaround. */
2540 if (oper->center_freq_seg1_idx) {
2541 unsigned int diff;
2542
2543 diff = abs(oper->center_freq_seg1_idx -
2544 oper->center_freq_seg0_idx);
2545 if (diff == 8) {
2546 new.width = NL80211_CHAN_WIDTH_160;
2547 new.center_freq1 = cf2;
2548 } else if (diff > 8) {
2549 new.width = NL80211_CHAN_WIDTH_80P80;
2550 new.center_freq2 = cf2;
2551 }
2552 }
2553 break;
2554 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2555 new.width = NL80211_CHAN_WIDTH_160;
2556 new.center_freq1 = cf1;
2557 break;
2558 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2559 new.width = NL80211_CHAN_WIDTH_80P80;
2560 new.center_freq1 = cf1;
2561 new.center_freq2 = cf2;
2562 break;
2563 default:
2564 return false;
2565 }
2566
2567 if (!cfg80211_chandef_valid(&new))
2568 return false;
2569
2570 *chandef = new;
2571 return true;
2572 }
2573
2574 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2575 const struct ieee80211_supported_band *sband,
2576 const u8 *srates, int srates_len, u32 *rates)
2577 {
2578 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2579 int shift = ieee80211_chandef_get_shift(chandef);
2580 struct ieee80211_rate *br;
2581 int brate, rate, i, j, count = 0;
2582
2583 *rates = 0;
2584
2585 for (i = 0; i < srates_len; i++) {
2586 rate = srates[i] & 0x7f;
2587
2588 for (j = 0; j < sband->n_bitrates; j++) {
2589 br = &sband->bitrates[j];
2590 if ((rate_flags & br->flags) != rate_flags)
2591 continue;
2592
2593 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2594 if (brate == rate) {
2595 *rates |= BIT(j);
2596 count++;
2597 break;
2598 }
2599 }
2600 }
2601 return count;
2602 }
2603
2604 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2605 struct sk_buff *skb, bool need_basic,
2606 enum nl80211_band band)
2607 {
2608 struct ieee80211_local *local = sdata->local;
2609 struct ieee80211_supported_band *sband;
2610 int rate, shift;
2611 u8 i, rates, *pos;
2612 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2613 u32 rate_flags;
2614
2615 shift = ieee80211_vif_get_shift(&sdata->vif);
2616 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2617 sband = local->hw.wiphy->bands[band];
2618 rates = 0;
2619 for (i = 0; i < sband->n_bitrates; i++) {
2620 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2621 continue;
2622 rates++;
2623 }
2624 if (rates > 8)
2625 rates = 8;
2626
2627 if (skb_tailroom(skb) < rates + 2)
2628 return -ENOMEM;
2629
2630 pos = skb_put(skb, rates + 2);
2631 *pos++ = WLAN_EID_SUPP_RATES;
2632 *pos++ = rates;
2633 for (i = 0; i < rates; i++) {
2634 u8 basic = 0;
2635 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2636 continue;
2637
2638 if (need_basic && basic_rates & BIT(i))
2639 basic = 0x80;
2640 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2641 5 * (1 << shift));
2642 *pos++ = basic | (u8) rate;
2643 }
2644
2645 return 0;
2646 }
2647
2648 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2649 struct sk_buff *skb, bool need_basic,
2650 enum nl80211_band band)
2651 {
2652 struct ieee80211_local *local = sdata->local;
2653 struct ieee80211_supported_band *sband;
2654 int rate, shift;
2655 u8 i, exrates, *pos;
2656 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2657 u32 rate_flags;
2658
2659 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2660 shift = ieee80211_vif_get_shift(&sdata->vif);
2661
2662 sband = local->hw.wiphy->bands[band];
2663 exrates = 0;
2664 for (i = 0; i < sband->n_bitrates; i++) {
2665 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2666 continue;
2667 exrates++;
2668 }
2669
2670 if (exrates > 8)
2671 exrates -= 8;
2672 else
2673 exrates = 0;
2674
2675 if (skb_tailroom(skb) < exrates + 2)
2676 return -ENOMEM;
2677
2678 if (exrates) {
2679 pos = skb_put(skb, exrates + 2);
2680 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2681 *pos++ = exrates;
2682 for (i = 8; i < sband->n_bitrates; i++) {
2683 u8 basic = 0;
2684 if ((rate_flags & sband->bitrates[i].flags)
2685 != rate_flags)
2686 continue;
2687 if (need_basic && basic_rates & BIT(i))
2688 basic = 0x80;
2689 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2690 5 * (1 << shift));
2691 *pos++ = basic | (u8) rate;
2692 }
2693 }
2694 return 0;
2695 }
2696
2697 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2698 {
2699 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2700 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2701
2702 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2703 /* non-managed type inferfaces */
2704 return 0;
2705 }
2706 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2707 }
2708 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2709
2710 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2711 {
2712 if (!mcs)
2713 return 1;
2714
2715 /* TODO: consider rx_highest */
2716
2717 if (mcs->rx_mask[3])
2718 return 4;
2719 if (mcs->rx_mask[2])
2720 return 3;
2721 if (mcs->rx_mask[1])
2722 return 2;
2723 return 1;
2724 }
2725
2726 /**
2727 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2728 * @local: mac80211 hw info struct
2729 * @status: RX status
2730 * @mpdu_len: total MPDU length (including FCS)
2731 * @mpdu_offset: offset into MPDU to calculate timestamp at
2732 *
2733 * This function calculates the RX timestamp at the given MPDU offset, taking
2734 * into account what the RX timestamp was. An offset of 0 will just normalize
2735 * the timestamp to TSF at beginning of MPDU reception.
2736 */
2737 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2738 struct ieee80211_rx_status *status,
2739 unsigned int mpdu_len,
2740 unsigned int mpdu_offset)
2741 {
2742 u64 ts = status->mactime;
2743 struct rate_info ri;
2744 u16 rate;
2745
2746 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2747 return 0;
2748
2749 memset(&ri, 0, sizeof(ri));
2750
2751 /* Fill cfg80211 rate info */
2752 switch (status->encoding) {
2753 case RX_ENC_HT:
2754 ri.mcs = status->rate_idx;
2755 ri.flags |= RATE_INFO_FLAGS_MCS;
2756 ri.bw = status->bw;
2757 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2758 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2759 break;
2760 case RX_ENC_VHT:
2761 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2762 ri.mcs = status->rate_idx;
2763 ri.nss = status->nss;
2764 ri.bw = status->bw;
2765 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2766 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2767 break;
2768 default:
2769 WARN_ON(1);
2770 /* fall through */
2771 case RX_ENC_LEGACY: {
2772 struct ieee80211_supported_band *sband;
2773 int shift = 0;
2774 int bitrate;
2775
2776 ri.bw = status->bw;
2777
2778 switch (status->bw) {
2779 case RATE_INFO_BW_10:
2780 shift = 1;
2781 break;
2782 case RATE_INFO_BW_5:
2783 shift = 2;
2784 break;
2785 }
2786
2787 sband = local->hw.wiphy->bands[status->band];
2788 bitrate = sband->bitrates[status->rate_idx].bitrate;
2789 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2790
2791 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2792 /* TODO: handle HT/VHT preambles */
2793 if (status->band == NL80211_BAND_5GHZ) {
2794 ts += 20 << shift;
2795 mpdu_offset += 2;
2796 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2797 ts += 96;
2798 } else {
2799 ts += 192;
2800 }
2801 }
2802 break;
2803 }
2804 }
2805
2806 rate = cfg80211_calculate_bitrate(&ri);
2807 if (WARN_ONCE(!rate,
2808 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2809 (unsigned long long)status->flag, status->rate_idx,
2810 status->nss))
2811 return 0;
2812
2813 /* rewind from end of MPDU */
2814 if (status->flag & RX_FLAG_MACTIME_END)
2815 ts -= mpdu_len * 8 * 10 / rate;
2816
2817 ts += mpdu_offset * 8 * 10 / rate;
2818
2819 return ts;
2820 }
2821
2822 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2823 {
2824 struct ieee80211_sub_if_data *sdata;
2825 struct cfg80211_chan_def chandef;
2826
2827 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2828 ASSERT_RTNL();
2829
2830 mutex_lock(&local->mtx);
2831 list_for_each_entry(sdata, &local->interfaces, list) {
2832 /* it might be waiting for the local->mtx, but then
2833 * by the time it gets it, sdata->wdev.cac_started
2834 * will no longer be true
2835 */
2836 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2837
2838 if (sdata->wdev.cac_started) {
2839 chandef = sdata->vif.bss_conf.chandef;
2840 ieee80211_vif_release_channel(sdata);
2841 cfg80211_cac_event(sdata->dev,
2842 &chandef,
2843 NL80211_RADAR_CAC_ABORTED,
2844 GFP_KERNEL);
2845 }
2846 }
2847 mutex_unlock(&local->mtx);
2848 }
2849
2850 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2851 {
2852 struct ieee80211_local *local =
2853 container_of(work, struct ieee80211_local, radar_detected_work);
2854 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2855 struct ieee80211_chanctx *ctx;
2856 int num_chanctx = 0;
2857
2858 mutex_lock(&local->chanctx_mtx);
2859 list_for_each_entry(ctx, &local->chanctx_list, list) {
2860 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2861 continue;
2862
2863 num_chanctx++;
2864 chandef = ctx->conf.def;
2865 }
2866 mutex_unlock(&local->chanctx_mtx);
2867
2868 rtnl_lock();
2869 ieee80211_dfs_cac_cancel(local);
2870 rtnl_unlock();
2871
2872 if (num_chanctx > 1)
2873 /* XXX: multi-channel is not supported yet */
2874 WARN_ON(1);
2875 else
2876 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2877 }
2878
2879 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2880 {
2881 struct ieee80211_local *local = hw_to_local(hw);
2882
2883 trace_api_radar_detected(local);
2884
2885 schedule_work(&local->radar_detected_work);
2886 }
2887 EXPORT_SYMBOL(ieee80211_radar_detected);
2888
2889 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2890 {
2891 u32 ret;
2892 int tmp;
2893
2894 switch (c->width) {
2895 case NL80211_CHAN_WIDTH_20:
2896 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2897 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2898 break;
2899 case NL80211_CHAN_WIDTH_40:
2900 c->width = NL80211_CHAN_WIDTH_20;
2901 c->center_freq1 = c->chan->center_freq;
2902 ret = IEEE80211_STA_DISABLE_40MHZ |
2903 IEEE80211_STA_DISABLE_VHT;
2904 break;
2905 case NL80211_CHAN_WIDTH_80:
2906 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2907 /* n_P40 */
2908 tmp /= 2;
2909 /* freq_P40 */
2910 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2911 c->width = NL80211_CHAN_WIDTH_40;
2912 ret = IEEE80211_STA_DISABLE_VHT;
2913 break;
2914 case NL80211_CHAN_WIDTH_80P80:
2915 c->center_freq2 = 0;
2916 c->width = NL80211_CHAN_WIDTH_80;
2917 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2918 IEEE80211_STA_DISABLE_160MHZ;
2919 break;
2920 case NL80211_CHAN_WIDTH_160:
2921 /* n_P20 */
2922 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2923 /* n_P80 */
2924 tmp /= 4;
2925 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2926 c->width = NL80211_CHAN_WIDTH_80;
2927 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2928 IEEE80211_STA_DISABLE_160MHZ;
2929 break;
2930 default:
2931 case NL80211_CHAN_WIDTH_20_NOHT:
2932 WARN_ON_ONCE(1);
2933 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2934 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2935 break;
2936 case NL80211_CHAN_WIDTH_5:
2937 case NL80211_CHAN_WIDTH_10:
2938 WARN_ON_ONCE(1);
2939 /* keep c->width */
2940 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2941 break;
2942 }
2943
2944 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2945
2946 return ret;
2947 }
2948
2949 /*
2950 * Returns true if smps_mode_new is strictly more restrictive than
2951 * smps_mode_old.
2952 */
2953 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2954 enum ieee80211_smps_mode smps_mode_new)
2955 {
2956 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2957 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2958 return false;
2959
2960 switch (smps_mode_old) {
2961 case IEEE80211_SMPS_STATIC:
2962 return false;
2963 case IEEE80211_SMPS_DYNAMIC:
2964 return smps_mode_new == IEEE80211_SMPS_STATIC;
2965 case IEEE80211_SMPS_OFF:
2966 return smps_mode_new != IEEE80211_SMPS_OFF;
2967 default:
2968 WARN_ON(1);
2969 }
2970
2971 return false;
2972 }
2973
2974 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2975 struct cfg80211_csa_settings *csa_settings)
2976 {
2977 struct sk_buff *skb;
2978 struct ieee80211_mgmt *mgmt;
2979 struct ieee80211_local *local = sdata->local;
2980 int freq;
2981 int hdr_len = offsetofend(struct ieee80211_mgmt,
2982 u.action.u.chan_switch);
2983 u8 *pos;
2984
2985 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2986 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2987 return -EOPNOTSUPP;
2988
2989 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2990 5 + /* channel switch announcement element */
2991 3 + /* secondary channel offset element */
2992 5 + /* wide bandwidth channel switch announcement */
2993 8); /* mesh channel switch parameters element */
2994 if (!skb)
2995 return -ENOMEM;
2996
2997 skb_reserve(skb, local->tx_headroom);
2998 mgmt = skb_put_zero(skb, hdr_len);
2999 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3000 IEEE80211_STYPE_ACTION);
3001
3002 eth_broadcast_addr(mgmt->da);
3003 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3004 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3005 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3006 } else {
3007 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3008 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3009 }
3010 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3011 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3012 pos = skb_put(skb, 5);
3013 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3014 *pos++ = 3; /* IE length */
3015 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3016 freq = csa_settings->chandef.chan->center_freq;
3017 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3018 *pos++ = csa_settings->count; /* count */
3019
3020 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3021 enum nl80211_channel_type ch_type;
3022
3023 skb_put(skb, 3);
3024 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3025 *pos++ = 1; /* IE length */
3026 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3027 if (ch_type == NL80211_CHAN_HT40PLUS)
3028 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3029 else
3030 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3031 }
3032
3033 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3034 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3035
3036 skb_put(skb, 8);
3037 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3038 *pos++ = 6; /* IE length */
3039 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3040 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3041 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3042 *pos++ |= csa_settings->block_tx ?
3043 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3044 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3045 pos += 2;
3046 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3047 pos += 2;
3048 }
3049
3050 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3051 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3052 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3053 skb_put(skb, 5);
3054 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3055 }
3056
3057 ieee80211_tx_skb(sdata, skb);
3058 return 0;
3059 }
3060
3061 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3062 {
3063 return !(cs == NULL || cs->cipher == 0 ||
3064 cs->hdr_len < cs->pn_len + cs->pn_off ||
3065 cs->hdr_len <= cs->key_idx_off ||
3066 cs->key_idx_shift > 7 ||
3067 cs->key_idx_mask == 0);
3068 }
3069
3070 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3071 {
3072 int i;
3073
3074 /* Ensure we have enough iftype bitmap space for all iftype values */
3075 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3076
3077 for (i = 0; i < n; i++)
3078 if (!ieee80211_cs_valid(&cs[i]))
3079 return false;
3080
3081 return true;
3082 }
3083
3084 const struct ieee80211_cipher_scheme *
3085 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3086 enum nl80211_iftype iftype)
3087 {
3088 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3089 int n = local->hw.n_cipher_schemes;
3090 int i;
3091 const struct ieee80211_cipher_scheme *cs = NULL;
3092
3093 for (i = 0; i < n; i++) {
3094 if (l[i].cipher == cipher) {
3095 cs = &l[i];
3096 break;
3097 }
3098 }
3099
3100 if (!cs || !(cs->iftype & BIT(iftype)))
3101 return NULL;
3102
3103 return cs;
3104 }
3105
3106 int ieee80211_cs_headroom(struct ieee80211_local *local,
3107 struct cfg80211_crypto_settings *crypto,
3108 enum nl80211_iftype iftype)
3109 {
3110 const struct ieee80211_cipher_scheme *cs;
3111 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3112 int i;
3113
3114 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3115 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3116 iftype);
3117
3118 if (cs && headroom < cs->hdr_len)
3119 headroom = cs->hdr_len;
3120 }
3121
3122 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3123 if (cs && headroom < cs->hdr_len)
3124 headroom = cs->hdr_len;
3125
3126 return headroom;
3127 }
3128
3129 static bool
3130 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3131 {
3132 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3133 int skip;
3134
3135 if (end > 0)
3136 return false;
3137
3138 /* One shot NOA */
3139 if (data->count[i] == 1)
3140 return false;
3141
3142 if (data->desc[i].interval == 0)
3143 return false;
3144
3145 /* End time is in the past, check for repetitions */
3146 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3147 if (data->count[i] < 255) {
3148 if (data->count[i] <= skip) {
3149 data->count[i] = 0;
3150 return false;
3151 }
3152
3153 data->count[i] -= skip;
3154 }
3155
3156 data->desc[i].start += skip * data->desc[i].interval;
3157
3158 return true;
3159 }
3160
3161 static bool
3162 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3163 s32 *offset)
3164 {
3165 bool ret = false;
3166 int i;
3167
3168 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3169 s32 cur;
3170
3171 if (!data->count[i])
3172 continue;
3173
3174 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3175 ret = true;
3176
3177 cur = data->desc[i].start - tsf;
3178 if (cur > *offset)
3179 continue;
3180
3181 cur = data->desc[i].start + data->desc[i].duration - tsf;
3182 if (cur > *offset)
3183 *offset = cur;
3184 }
3185
3186 return ret;
3187 }
3188
3189 static u32
3190 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3191 {
3192 s32 offset = 0;
3193 int tries = 0;
3194 /*
3195 * arbitrary limit, used to avoid infinite loops when combined NoA
3196 * descriptors cover the full time period.
3197 */
3198 int max_tries = 5;
3199
3200 ieee80211_extend_absent_time(data, tsf, &offset);
3201 do {
3202 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3203 break;
3204
3205 tries++;
3206 } while (tries < max_tries);
3207
3208 return offset;
3209 }
3210
3211 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3212 {
3213 u32 next_offset = BIT(31) - 1;
3214 int i;
3215
3216 data->absent = 0;
3217 data->has_next_tsf = false;
3218 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3219 s32 start;
3220
3221 if (!data->count[i])
3222 continue;
3223
3224 ieee80211_extend_noa_desc(data, tsf, i);
3225 start = data->desc[i].start - tsf;
3226 if (start <= 0)
3227 data->absent |= BIT(i);
3228
3229 if (next_offset > start)
3230 next_offset = start;
3231
3232 data->has_next_tsf = true;
3233 }
3234
3235 if (data->absent)
3236 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3237
3238 data->next_tsf = tsf + next_offset;
3239 }
3240 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3241
3242 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3243 struct ieee80211_noa_data *data, u32 tsf)
3244 {
3245 int ret = 0;
3246 int i;
3247
3248 memset(data, 0, sizeof(*data));
3249
3250 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3251 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3252
3253 if (!desc->count || !desc->duration)
3254 continue;
3255
3256 data->count[i] = desc->count;
3257 data->desc[i].start = le32_to_cpu(desc->start_time);
3258 data->desc[i].duration = le32_to_cpu(desc->duration);
3259 data->desc[i].interval = le32_to_cpu(desc->interval);
3260
3261 if (data->count[i] > 1 &&
3262 data->desc[i].interval < data->desc[i].duration)
3263 continue;
3264
3265 ieee80211_extend_noa_desc(data, tsf, i);
3266 ret++;
3267 }
3268
3269 if (ret)
3270 ieee80211_update_p2p_noa(data, tsf);
3271
3272 return ret;
3273 }
3274 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3275
3276 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3277 struct ieee80211_sub_if_data *sdata)
3278 {
3279 u64 tsf = drv_get_tsf(local, sdata);
3280 u64 dtim_count = 0;
3281 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3282 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3283 struct ps_data *ps;
3284 u8 bcns_from_dtim;
3285
3286 if (tsf == -1ULL || !beacon_int || !dtim_period)
3287 return;
3288
3289 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3290 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3291 if (!sdata->bss)
3292 return;
3293
3294 ps = &sdata->bss->ps;
3295 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3296 ps = &sdata->u.mesh.ps;
3297 } else {
3298 return;
3299 }
3300
3301 /*
3302 * actually finds last dtim_count, mac80211 will update in
3303 * __beacon_add_tim().
3304 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3305 */
3306 do_div(tsf, beacon_int);
3307 bcns_from_dtim = do_div(tsf, dtim_period);
3308 /* just had a DTIM */
3309 if (!bcns_from_dtim)
3310 dtim_count = 0;
3311 else
3312 dtim_count = dtim_period - bcns_from_dtim;
3313
3314 ps->dtim_count = dtim_count;
3315 }
3316
3317 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3318 struct ieee80211_chanctx *ctx)
3319 {
3320 struct ieee80211_sub_if_data *sdata;
3321 u8 radar_detect = 0;
3322
3323 lockdep_assert_held(&local->chanctx_mtx);
3324
3325 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3326 return 0;
3327
3328 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3329 if (sdata->reserved_radar_required)
3330 radar_detect |= BIT(sdata->reserved_chandef.width);
3331
3332 /*
3333 * An in-place reservation context should not have any assigned vifs
3334 * until it replaces the other context.
3335 */
3336 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3337 !list_empty(&ctx->assigned_vifs));
3338
3339 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3340 if (sdata->radar_required)
3341 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3342
3343 return radar_detect;
3344 }
3345
3346 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3347 const struct cfg80211_chan_def *chandef,
3348 enum ieee80211_chanctx_mode chanmode,
3349 u8 radar_detect)
3350 {
3351 struct ieee80211_local *local = sdata->local;
3352 struct ieee80211_sub_if_data *sdata_iter;
3353 enum nl80211_iftype iftype = sdata->wdev.iftype;
3354 struct ieee80211_chanctx *ctx;
3355 int total = 1;
3356 struct iface_combination_params params = {
3357 .radar_detect = radar_detect,
3358 };
3359
3360 lockdep_assert_held(&local->chanctx_mtx);
3361
3362 if (WARN_ON(hweight32(radar_detect) > 1))
3363 return -EINVAL;
3364
3365 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3366 !chandef->chan))
3367 return -EINVAL;
3368
3369 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3370 return -EINVAL;
3371
3372 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3373 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3374 /*
3375 * always passing this is harmless, since it'll be the
3376 * same value that cfg80211 finds if it finds the same
3377 * interface ... and that's always allowed
3378 */
3379 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3380 }
3381
3382 /* Always allow software iftypes */
3383 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3384 if (radar_detect)
3385 return -EINVAL;
3386 return 0;
3387 }
3388
3389 if (chandef)
3390 params.num_different_channels = 1;
3391
3392 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3393 params.iftype_num[iftype] = 1;
3394
3395 list_for_each_entry(ctx, &local->chanctx_list, list) {
3396 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3397 continue;
3398 params.radar_detect |=
3399 ieee80211_chanctx_radar_detect(local, ctx);
3400 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3401 params.num_different_channels++;
3402 continue;
3403 }
3404 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3405 cfg80211_chandef_compatible(chandef,
3406 &ctx->conf.def))
3407 continue;
3408 params.num_different_channels++;
3409 }
3410
3411 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3412 struct wireless_dev *wdev_iter;
3413
3414 wdev_iter = &sdata_iter->wdev;
3415
3416 if (sdata_iter == sdata ||
3417 !ieee80211_sdata_running(sdata_iter) ||
3418 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3419 continue;
3420
3421 params.iftype_num[wdev_iter->iftype]++;
3422 total++;
3423 }
3424
3425 if (total == 1 && !params.radar_detect)
3426 return 0;
3427
3428 return cfg80211_check_combinations(local->hw.wiphy, &params);
3429 }
3430
3431 static void
3432 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3433 void *data)
3434 {
3435 u32 *max_num_different_channels = data;
3436
3437 *max_num_different_channels = max(*max_num_different_channels,
3438 c->num_different_channels);
3439 }
3440
3441 int ieee80211_max_num_channels(struct ieee80211_local *local)
3442 {
3443 struct ieee80211_sub_if_data *sdata;
3444 struct ieee80211_chanctx *ctx;
3445 u32 max_num_different_channels = 1;
3446 int err;
3447 struct iface_combination_params params = {0};
3448
3449 lockdep_assert_held(&local->chanctx_mtx);
3450
3451 list_for_each_entry(ctx, &local->chanctx_list, list) {
3452 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3453 continue;
3454
3455 params.num_different_channels++;
3456
3457 params.radar_detect |=
3458 ieee80211_chanctx_radar_detect(local, ctx);
3459 }
3460
3461 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3462 params.iftype_num[sdata->wdev.iftype]++;
3463
3464 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3465 ieee80211_iter_max_chans,
3466 &max_num_different_channels);
3467 if (err < 0)
3468 return err;
3469
3470 return max_num_different_channels;
3471 }
3472
3473 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3474 {
3475 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3476 *buf++ = 7; /* len */
3477 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3478 *buf++ = 0x50;
3479 *buf++ = 0xf2;
3480 *buf++ = 2; /* WME */
3481 *buf++ = 0; /* WME info */
3482 *buf++ = 1; /* WME ver */
3483 *buf++ = qosinfo; /* U-APSD no in use */
3484
3485 return buf;
3486 }
3487
3488 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3489 unsigned long *frame_cnt,
3490 unsigned long *byte_cnt)
3491 {
3492 struct txq_info *txqi = to_txq_info(txq);
3493 u32 frag_cnt = 0, frag_bytes = 0;
3494 struct sk_buff *skb;
3495
3496 skb_queue_walk(&txqi->frags, skb) {
3497 frag_cnt++;
3498 frag_bytes += skb->len;
3499 }
3500
3501 if (frame_cnt)
3502 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3503
3504 if (byte_cnt)
3505 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3506 }
3507 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3508
3509 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3510 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3511 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3512 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3513 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3514 };
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