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[mirror_ubuntu-bionic-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 = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1246 memset(mgmt, 0, 24 + 6);
1247 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1248 IEEE80211_STYPE_AUTH);
1249 memcpy(mgmt->da, da, ETH_ALEN);
1250 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1251 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1252 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1253 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1254 mgmt->u.auth.status_code = cpu_to_le16(status);
1255 if (extra)
1256 memcpy(skb_put(skb, extra_len), extra, extra_len);
1257
1258 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1259 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1260 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1261 WARN_ON(err);
1262 }
1263
1264 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1265 tx_flags;
1266 ieee80211_tx_skb(sdata, skb);
1267 }
1268
1269 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1270 const u8 *bssid, u16 stype, u16 reason,
1271 bool send_frame, u8 *frame_buf)
1272 {
1273 struct ieee80211_local *local = sdata->local;
1274 struct sk_buff *skb;
1275 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1276
1277 /* build frame */
1278 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1279 mgmt->duration = 0; /* initialize only */
1280 mgmt->seq_ctrl = 0; /* initialize only */
1281 memcpy(mgmt->da, bssid, ETH_ALEN);
1282 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1283 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1284 /* u.deauth.reason_code == u.disassoc.reason_code */
1285 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1286
1287 if (send_frame) {
1288 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1289 IEEE80211_DEAUTH_FRAME_LEN);
1290 if (!skb)
1291 return;
1292
1293 skb_reserve(skb, local->hw.extra_tx_headroom);
1294
1295 /* copy in frame */
1296 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1297 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1298
1299 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1300 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1301 IEEE80211_SKB_CB(skb)->flags |=
1302 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1303
1304 ieee80211_tx_skb(sdata, skb);
1305 }
1306 }
1307
1308 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1309 u8 *buffer, size_t buffer_len,
1310 const u8 *ie, size_t ie_len,
1311 enum nl80211_band band,
1312 u32 rate_mask,
1313 struct cfg80211_chan_def *chandef,
1314 size_t *offset)
1315 {
1316 struct ieee80211_supported_band *sband;
1317 u8 *pos = buffer, *end = buffer + buffer_len;
1318 size_t noffset;
1319 int supp_rates_len, i;
1320 u8 rates[32];
1321 int num_rates;
1322 int ext_rates_len;
1323 int shift;
1324 u32 rate_flags;
1325 bool have_80mhz = false;
1326
1327 *offset = 0;
1328
1329 sband = local->hw.wiphy->bands[band];
1330 if (WARN_ON_ONCE(!sband))
1331 return 0;
1332
1333 rate_flags = ieee80211_chandef_rate_flags(chandef);
1334 shift = ieee80211_chandef_get_shift(chandef);
1335
1336 num_rates = 0;
1337 for (i = 0; i < sband->n_bitrates; i++) {
1338 if ((BIT(i) & rate_mask) == 0)
1339 continue; /* skip rate */
1340 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1341 continue;
1342
1343 rates[num_rates++] =
1344 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1345 (1 << shift) * 5);
1346 }
1347
1348 supp_rates_len = min_t(int, num_rates, 8);
1349
1350 if (end - pos < 2 + supp_rates_len)
1351 goto out_err;
1352 *pos++ = WLAN_EID_SUPP_RATES;
1353 *pos++ = supp_rates_len;
1354 memcpy(pos, rates, supp_rates_len);
1355 pos += supp_rates_len;
1356
1357 /* insert "request information" if in custom IEs */
1358 if (ie && ie_len) {
1359 static const u8 before_extrates[] = {
1360 WLAN_EID_SSID,
1361 WLAN_EID_SUPP_RATES,
1362 WLAN_EID_REQUEST,
1363 };
1364 noffset = ieee80211_ie_split(ie, ie_len,
1365 before_extrates,
1366 ARRAY_SIZE(before_extrates),
1367 *offset);
1368 if (end - pos < noffset - *offset)
1369 goto out_err;
1370 memcpy(pos, ie + *offset, noffset - *offset);
1371 pos += noffset - *offset;
1372 *offset = noffset;
1373 }
1374
1375 ext_rates_len = num_rates - supp_rates_len;
1376 if (ext_rates_len > 0) {
1377 if (end - pos < 2 + ext_rates_len)
1378 goto out_err;
1379 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1380 *pos++ = ext_rates_len;
1381 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1382 pos += ext_rates_len;
1383 }
1384
1385 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1386 if (end - pos < 3)
1387 goto out_err;
1388 *pos++ = WLAN_EID_DS_PARAMS;
1389 *pos++ = 1;
1390 *pos++ = ieee80211_frequency_to_channel(
1391 chandef->chan->center_freq);
1392 }
1393
1394 /* insert custom IEs that go before HT */
1395 if (ie && ie_len) {
1396 static const u8 before_ht[] = {
1397 WLAN_EID_SSID,
1398 WLAN_EID_SUPP_RATES,
1399 WLAN_EID_REQUEST,
1400 WLAN_EID_EXT_SUPP_RATES,
1401 WLAN_EID_DS_PARAMS,
1402 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1403 };
1404 noffset = ieee80211_ie_split(ie, ie_len,
1405 before_ht, ARRAY_SIZE(before_ht),
1406 *offset);
1407 if (end - pos < noffset - *offset)
1408 goto out_err;
1409 memcpy(pos, ie + *offset, noffset - *offset);
1410 pos += noffset - *offset;
1411 *offset = noffset;
1412 }
1413
1414 if (sband->ht_cap.ht_supported) {
1415 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1416 goto out_err;
1417 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1418 sband->ht_cap.cap);
1419 }
1420
1421 /*
1422 * If adding more here, adjust code in main.c
1423 * that calculates local->scan_ies_len.
1424 */
1425
1426 /* insert custom IEs that go before VHT */
1427 if (ie && ie_len) {
1428 static const u8 before_vht[] = {
1429 WLAN_EID_SSID,
1430 WLAN_EID_SUPP_RATES,
1431 WLAN_EID_REQUEST,
1432 WLAN_EID_EXT_SUPP_RATES,
1433 WLAN_EID_DS_PARAMS,
1434 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1435 WLAN_EID_HT_CAPABILITY,
1436 WLAN_EID_BSS_COEX_2040,
1437 WLAN_EID_EXT_CAPABILITY,
1438 WLAN_EID_SSID_LIST,
1439 WLAN_EID_CHANNEL_USAGE,
1440 WLAN_EID_INTERWORKING,
1441 /* mesh ID can't happen here */
1442 /* 60 GHz can't happen here right now */
1443 };
1444 noffset = ieee80211_ie_split(ie, ie_len,
1445 before_vht, ARRAY_SIZE(before_vht),
1446 *offset);
1447 if (end - pos < noffset - *offset)
1448 goto out_err;
1449 memcpy(pos, ie + *offset, noffset - *offset);
1450 pos += noffset - *offset;
1451 *offset = noffset;
1452 }
1453
1454 /* Check if any channel in this sband supports at least 80 MHz */
1455 for (i = 0; i < sband->n_channels; i++) {
1456 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1457 IEEE80211_CHAN_NO_80MHZ))
1458 continue;
1459
1460 have_80mhz = true;
1461 break;
1462 }
1463
1464 if (sband->vht_cap.vht_supported && have_80mhz) {
1465 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1466 goto out_err;
1467 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1468 sband->vht_cap.cap);
1469 }
1470
1471 return pos - buffer;
1472 out_err:
1473 WARN_ONCE(1, "not enough space for preq IEs\n");
1474 return pos - buffer;
1475 }
1476
1477 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1478 size_t buffer_len,
1479 struct ieee80211_scan_ies *ie_desc,
1480 const u8 *ie, size_t ie_len,
1481 u8 bands_used, u32 *rate_masks,
1482 struct cfg80211_chan_def *chandef)
1483 {
1484 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1485 int i;
1486
1487 memset(ie_desc, 0, sizeof(*ie_desc));
1488
1489 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1490 if (bands_used & BIT(i)) {
1491 pos += ieee80211_build_preq_ies_band(local,
1492 buffer + pos,
1493 buffer_len - pos,
1494 ie, ie_len, i,
1495 rate_masks[i],
1496 chandef,
1497 &custom_ie_offset);
1498 ie_desc->ies[i] = buffer + old_pos;
1499 ie_desc->len[i] = pos - old_pos;
1500 old_pos = pos;
1501 }
1502 }
1503
1504 /* add any remaining custom IEs */
1505 if (ie && ie_len) {
1506 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1507 "not enough space for preq custom IEs\n"))
1508 return pos;
1509 memcpy(buffer + pos, ie + custom_ie_offset,
1510 ie_len - custom_ie_offset);
1511 ie_desc->common_ies = buffer + pos;
1512 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1513 pos += ie_len - custom_ie_offset;
1514 }
1515
1516 return pos;
1517 };
1518
1519 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1520 const u8 *src, const u8 *dst,
1521 u32 ratemask,
1522 struct ieee80211_channel *chan,
1523 const u8 *ssid, size_t ssid_len,
1524 const u8 *ie, size_t ie_len,
1525 bool directed)
1526 {
1527 struct ieee80211_local *local = sdata->local;
1528 struct cfg80211_chan_def chandef;
1529 struct sk_buff *skb;
1530 struct ieee80211_mgmt *mgmt;
1531 int ies_len;
1532 u32 rate_masks[NUM_NL80211_BANDS] = {};
1533 struct ieee80211_scan_ies dummy_ie_desc;
1534
1535 /*
1536 * Do not send DS Channel parameter for directed probe requests
1537 * in order to maximize the chance that we get a response. Some
1538 * badly-behaved APs don't respond when this parameter is included.
1539 */
1540 chandef.width = sdata->vif.bss_conf.chandef.width;
1541 if (directed)
1542 chandef.chan = NULL;
1543 else
1544 chandef.chan = chan;
1545
1546 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1547 100 + ie_len);
1548 if (!skb)
1549 return NULL;
1550
1551 rate_masks[chan->band] = ratemask;
1552 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1553 skb_tailroom(skb), &dummy_ie_desc,
1554 ie, ie_len, BIT(chan->band),
1555 rate_masks, &chandef);
1556 skb_put(skb, ies_len);
1557
1558 if (dst) {
1559 mgmt = (struct ieee80211_mgmt *) skb->data;
1560 memcpy(mgmt->da, dst, ETH_ALEN);
1561 memcpy(mgmt->bssid, dst, ETH_ALEN);
1562 }
1563
1564 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1565
1566 return skb;
1567 }
1568
1569 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1570 const u8 *src, const u8 *dst,
1571 const u8 *ssid, size_t ssid_len,
1572 const u8 *ie, size_t ie_len,
1573 u32 ratemask, bool directed, u32 tx_flags,
1574 struct ieee80211_channel *channel, bool scan)
1575 {
1576 struct sk_buff *skb;
1577
1578 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1579 ssid, ssid_len,
1580 ie, ie_len, directed);
1581 if (skb) {
1582 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1583 if (scan)
1584 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1585 else
1586 ieee80211_tx_skb(sdata, skb);
1587 }
1588 }
1589
1590 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1591 struct ieee802_11_elems *elems,
1592 enum nl80211_band band, u32 *basic_rates)
1593 {
1594 struct ieee80211_supported_band *sband;
1595 size_t num_rates;
1596 u32 supp_rates, rate_flags;
1597 int i, j, shift;
1598
1599 sband = sdata->local->hw.wiphy->bands[band];
1600 if (WARN_ON(!sband))
1601 return 1;
1602
1603 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1604 shift = ieee80211_vif_get_shift(&sdata->vif);
1605
1606 num_rates = sband->n_bitrates;
1607 supp_rates = 0;
1608 for (i = 0; i < elems->supp_rates_len +
1609 elems->ext_supp_rates_len; i++) {
1610 u8 rate = 0;
1611 int own_rate;
1612 bool is_basic;
1613 if (i < elems->supp_rates_len)
1614 rate = elems->supp_rates[i];
1615 else if (elems->ext_supp_rates)
1616 rate = elems->ext_supp_rates
1617 [i - elems->supp_rates_len];
1618 own_rate = 5 * (rate & 0x7f);
1619 is_basic = !!(rate & 0x80);
1620
1621 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1622 continue;
1623
1624 for (j = 0; j < num_rates; j++) {
1625 int brate;
1626 if ((rate_flags & sband->bitrates[j].flags)
1627 != rate_flags)
1628 continue;
1629
1630 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1631 1 << shift);
1632
1633 if (brate == own_rate) {
1634 supp_rates |= BIT(j);
1635 if (basic_rates && is_basic)
1636 *basic_rates |= BIT(j);
1637 }
1638 }
1639 }
1640 return supp_rates;
1641 }
1642
1643 void ieee80211_stop_device(struct ieee80211_local *local)
1644 {
1645 ieee80211_led_radio(local, false);
1646 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1647
1648 cancel_work_sync(&local->reconfig_filter);
1649
1650 flush_workqueue(local->workqueue);
1651 drv_stop(local);
1652 }
1653
1654 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1655 bool aborted)
1656 {
1657 /* It's possible that we don't handle the scan completion in
1658 * time during suspend, so if it's still marked as completed
1659 * here, queue the work and flush it to clean things up.
1660 * Instead of calling the worker function directly here, we
1661 * really queue it to avoid potential races with other flows
1662 * scheduling the same work.
1663 */
1664 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1665 /* If coming from reconfiguration failure, abort the scan so
1666 * we don't attempt to continue a partial HW scan - which is
1667 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1668 * completed scan, and a 5 GHz portion is still pending.
1669 */
1670 if (aborted)
1671 set_bit(SCAN_ABORTED, &local->scanning);
1672 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1673 flush_delayed_work(&local->scan_work);
1674 }
1675 }
1676
1677 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1678 {
1679 struct ieee80211_sub_if_data *sdata;
1680 struct ieee80211_chanctx *ctx;
1681
1682 /*
1683 * We get here if during resume the device can't be restarted properly.
1684 * We might also get here if this happens during HW reset, which is a
1685 * slightly different situation and we need to drop all connections in
1686 * the latter case.
1687 *
1688 * Ask cfg80211 to turn off all interfaces, this will result in more
1689 * warnings but at least we'll then get into a clean stopped state.
1690 */
1691
1692 local->resuming = false;
1693 local->suspended = false;
1694 local->in_reconfig = false;
1695
1696 ieee80211_flush_completed_scan(local, true);
1697
1698 /* scheduled scan clearly can't be running any more, but tell
1699 * cfg80211 and clear local state
1700 */
1701 ieee80211_sched_scan_end(local);
1702
1703 list_for_each_entry(sdata, &local->interfaces, list)
1704 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1705
1706 /* Mark channel contexts as not being in the driver any more to avoid
1707 * removing them from the driver during the shutdown process...
1708 */
1709 mutex_lock(&local->chanctx_mtx);
1710 list_for_each_entry(ctx, &local->chanctx_list, list)
1711 ctx->driver_present = false;
1712 mutex_unlock(&local->chanctx_mtx);
1713
1714 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1715 }
1716
1717 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1718 struct ieee80211_sub_if_data *sdata)
1719 {
1720 struct ieee80211_chanctx_conf *conf;
1721 struct ieee80211_chanctx *ctx;
1722
1723 if (!local->use_chanctx)
1724 return;
1725
1726 mutex_lock(&local->chanctx_mtx);
1727 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1728 lockdep_is_held(&local->chanctx_mtx));
1729 if (conf) {
1730 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1731 drv_assign_vif_chanctx(local, sdata, ctx);
1732 }
1733 mutex_unlock(&local->chanctx_mtx);
1734 }
1735
1736 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1737 {
1738 struct ieee80211_local *local = sdata->local;
1739 struct sta_info *sta;
1740
1741 /* add STAs back */
1742 mutex_lock(&local->sta_mtx);
1743 list_for_each_entry(sta, &local->sta_list, list) {
1744 enum ieee80211_sta_state state;
1745
1746 if (!sta->uploaded || sta->sdata != sdata)
1747 continue;
1748
1749 for (state = IEEE80211_STA_NOTEXIST;
1750 state < sta->sta_state; state++)
1751 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1752 state + 1));
1753 }
1754 mutex_unlock(&local->sta_mtx);
1755 }
1756
1757 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1758 {
1759 struct cfg80211_nan_func *func, **funcs;
1760 int res, id, i = 0;
1761
1762 res = drv_start_nan(sdata->local, sdata,
1763 &sdata->u.nan.conf);
1764 if (WARN_ON(res))
1765 return res;
1766
1767 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1768 sizeof(*funcs), GFP_KERNEL);
1769 if (!funcs)
1770 return -ENOMEM;
1771
1772 /* Add all the functions:
1773 * This is a little bit ugly. We need to call a potentially sleeping
1774 * callback for each NAN function, so we can't hold the spinlock.
1775 */
1776 spin_lock_bh(&sdata->u.nan.func_lock);
1777
1778 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1779 funcs[i++] = func;
1780
1781 spin_unlock_bh(&sdata->u.nan.func_lock);
1782
1783 for (i = 0; funcs[i]; i++) {
1784 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1785 if (WARN_ON(res))
1786 ieee80211_nan_func_terminated(&sdata->vif,
1787 funcs[i]->instance_id,
1788 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1789 GFP_KERNEL);
1790 }
1791
1792 kfree(funcs);
1793
1794 return 0;
1795 }
1796
1797 int ieee80211_reconfig(struct ieee80211_local *local)
1798 {
1799 struct ieee80211_hw *hw = &local->hw;
1800 struct ieee80211_sub_if_data *sdata;
1801 struct ieee80211_chanctx *ctx;
1802 struct sta_info *sta;
1803 int res, i;
1804 bool reconfig_due_to_wowlan = false;
1805 struct ieee80211_sub_if_data *sched_scan_sdata;
1806 struct cfg80211_sched_scan_request *sched_scan_req;
1807 bool sched_scan_stopped = false;
1808 bool suspended = local->suspended;
1809
1810 /* nothing to do if HW shouldn't run */
1811 if (!local->open_count)
1812 goto wake_up;
1813
1814 #ifdef CONFIG_PM
1815 if (suspended)
1816 local->resuming = true;
1817
1818 if (local->wowlan) {
1819 /*
1820 * In the wowlan case, both mac80211 and the device
1821 * are functional when the resume op is called, so
1822 * clear local->suspended so the device could operate
1823 * normally (e.g. pass rx frames).
1824 */
1825 local->suspended = false;
1826 res = drv_resume(local);
1827 local->wowlan = false;
1828 if (res < 0) {
1829 local->resuming = false;
1830 return res;
1831 }
1832 if (res == 0)
1833 goto wake_up;
1834 WARN_ON(res > 1);
1835 /*
1836 * res is 1, which means the driver requested
1837 * to go through a regular reset on wakeup.
1838 * restore local->suspended in this case.
1839 */
1840 reconfig_due_to_wowlan = true;
1841 local->suspended = true;
1842 }
1843 #endif
1844
1845 /*
1846 * In case of hw_restart during suspend (without wowlan),
1847 * cancel restart work, as we are reconfiguring the device
1848 * anyway.
1849 * Note that restart_work is scheduled on a frozen workqueue,
1850 * so we can't deadlock in this case.
1851 */
1852 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1853 cancel_work_sync(&local->restart_work);
1854
1855 local->started = false;
1856
1857 /*
1858 * Upon resume hardware can sometimes be goofy due to
1859 * various platform / driver / bus issues, so restarting
1860 * the device may at times not work immediately. Propagate
1861 * the error.
1862 */
1863 res = drv_start(local);
1864 if (res) {
1865 if (suspended)
1866 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1867 else
1868 WARN(1, "Hardware became unavailable during restart.\n");
1869 ieee80211_handle_reconfig_failure(local);
1870 return res;
1871 }
1872
1873 /* setup fragmentation threshold */
1874 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1875
1876 /* setup RTS threshold */
1877 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1878
1879 /* reset coverage class */
1880 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1881
1882 ieee80211_led_radio(local, true);
1883 ieee80211_mod_tpt_led_trig(local,
1884 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1885
1886 /* add interfaces */
1887 sdata = rtnl_dereference(local->monitor_sdata);
1888 if (sdata) {
1889 /* in HW restart it exists already */
1890 WARN_ON(local->resuming);
1891 res = drv_add_interface(local, sdata);
1892 if (WARN_ON(res)) {
1893 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1894 synchronize_net();
1895 kfree(sdata);
1896 }
1897 }
1898
1899 list_for_each_entry(sdata, &local->interfaces, list) {
1900 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1901 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1902 ieee80211_sdata_running(sdata)) {
1903 res = drv_add_interface(local, sdata);
1904 if (WARN_ON(res))
1905 break;
1906 }
1907 }
1908
1909 /* If adding any of the interfaces failed above, roll back and
1910 * report failure.
1911 */
1912 if (res) {
1913 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1914 list)
1915 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1916 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1917 ieee80211_sdata_running(sdata))
1918 drv_remove_interface(local, sdata);
1919 ieee80211_handle_reconfig_failure(local);
1920 return res;
1921 }
1922
1923 /* add channel contexts */
1924 if (local->use_chanctx) {
1925 mutex_lock(&local->chanctx_mtx);
1926 list_for_each_entry(ctx, &local->chanctx_list, list)
1927 if (ctx->replace_state !=
1928 IEEE80211_CHANCTX_REPLACES_OTHER)
1929 WARN_ON(drv_add_chanctx(local, ctx));
1930 mutex_unlock(&local->chanctx_mtx);
1931
1932 sdata = rtnl_dereference(local->monitor_sdata);
1933 if (sdata && ieee80211_sdata_running(sdata))
1934 ieee80211_assign_chanctx(local, sdata);
1935 }
1936
1937 /* reconfigure hardware */
1938 ieee80211_hw_config(local, ~0);
1939
1940 ieee80211_configure_filter(local);
1941
1942 /* Finally also reconfigure all the BSS information */
1943 list_for_each_entry(sdata, &local->interfaces, list) {
1944 u32 changed;
1945
1946 if (!ieee80211_sdata_running(sdata))
1947 continue;
1948
1949 ieee80211_assign_chanctx(local, sdata);
1950
1951 switch (sdata->vif.type) {
1952 case NL80211_IFTYPE_AP_VLAN:
1953 case NL80211_IFTYPE_MONITOR:
1954 break;
1955 default:
1956 ieee80211_reconfig_stations(sdata);
1957 /* fall through */
1958 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1959 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1960 drv_conf_tx(local, sdata, i,
1961 &sdata->tx_conf[i]);
1962 break;
1963 }
1964
1965 /* common change flags for all interface types */
1966 changed = BSS_CHANGED_ERP_CTS_PROT |
1967 BSS_CHANGED_ERP_PREAMBLE |
1968 BSS_CHANGED_ERP_SLOT |
1969 BSS_CHANGED_HT |
1970 BSS_CHANGED_BASIC_RATES |
1971 BSS_CHANGED_BEACON_INT |
1972 BSS_CHANGED_BSSID |
1973 BSS_CHANGED_CQM |
1974 BSS_CHANGED_QOS |
1975 BSS_CHANGED_IDLE |
1976 BSS_CHANGED_TXPOWER;
1977
1978 if (sdata->vif.mu_mimo_owner)
1979 changed |= BSS_CHANGED_MU_GROUPS;
1980
1981 switch (sdata->vif.type) {
1982 case NL80211_IFTYPE_STATION:
1983 changed |= BSS_CHANGED_ASSOC |
1984 BSS_CHANGED_ARP_FILTER |
1985 BSS_CHANGED_PS;
1986
1987 /* Re-send beacon info report to the driver */
1988 if (sdata->u.mgd.have_beacon)
1989 changed |= BSS_CHANGED_BEACON_INFO;
1990
1991 if (sdata->vif.bss_conf.max_idle_period ||
1992 sdata->vif.bss_conf.protected_keep_alive)
1993 changed |= BSS_CHANGED_KEEP_ALIVE;
1994
1995 sdata_lock(sdata);
1996 ieee80211_bss_info_change_notify(sdata, changed);
1997 sdata_unlock(sdata);
1998 break;
1999 case NL80211_IFTYPE_OCB:
2000 changed |= BSS_CHANGED_OCB;
2001 ieee80211_bss_info_change_notify(sdata, changed);
2002 break;
2003 case NL80211_IFTYPE_ADHOC:
2004 changed |= BSS_CHANGED_IBSS;
2005 /* fall through */
2006 case NL80211_IFTYPE_AP:
2007 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2008
2009 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2010 changed |= BSS_CHANGED_AP_PROBE_RESP;
2011
2012 if (rcu_access_pointer(sdata->u.ap.beacon))
2013 drv_start_ap(local, sdata);
2014 }
2015
2016 /* fall through */
2017 case NL80211_IFTYPE_MESH_POINT:
2018 if (sdata->vif.bss_conf.enable_beacon) {
2019 changed |= BSS_CHANGED_BEACON |
2020 BSS_CHANGED_BEACON_ENABLED;
2021 ieee80211_bss_info_change_notify(sdata, changed);
2022 }
2023 break;
2024 case NL80211_IFTYPE_NAN:
2025 res = ieee80211_reconfig_nan(sdata);
2026 if (res < 0) {
2027 ieee80211_handle_reconfig_failure(local);
2028 return res;
2029 }
2030 break;
2031 case NL80211_IFTYPE_WDS:
2032 case NL80211_IFTYPE_AP_VLAN:
2033 case NL80211_IFTYPE_MONITOR:
2034 case NL80211_IFTYPE_P2P_DEVICE:
2035 /* nothing to do */
2036 break;
2037 case NL80211_IFTYPE_UNSPECIFIED:
2038 case NUM_NL80211_IFTYPES:
2039 case NL80211_IFTYPE_P2P_CLIENT:
2040 case NL80211_IFTYPE_P2P_GO:
2041 WARN_ON(1);
2042 break;
2043 }
2044 }
2045
2046 ieee80211_recalc_ps(local);
2047
2048 /*
2049 * The sta might be in psm against the ap (e.g. because
2050 * this was the state before a hw restart), so we
2051 * explicitly send a null packet in order to make sure
2052 * it'll sync against the ap (and get out of psm).
2053 */
2054 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2055 list_for_each_entry(sdata, &local->interfaces, list) {
2056 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2057 continue;
2058 if (!sdata->u.mgd.associated)
2059 continue;
2060
2061 ieee80211_send_nullfunc(local, sdata, false);
2062 }
2063 }
2064
2065 /* APs are now beaconing, add back stations */
2066 mutex_lock(&local->sta_mtx);
2067 list_for_each_entry(sta, &local->sta_list, list) {
2068 enum ieee80211_sta_state state;
2069
2070 if (!sta->uploaded)
2071 continue;
2072
2073 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2074 continue;
2075
2076 for (state = IEEE80211_STA_NOTEXIST;
2077 state < sta->sta_state; state++)
2078 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2079 state + 1));
2080 }
2081 mutex_unlock(&local->sta_mtx);
2082
2083 /* add back keys */
2084 list_for_each_entry(sdata, &local->interfaces, list)
2085 ieee80211_reset_crypto_tx_tailroom(sdata);
2086
2087 list_for_each_entry(sdata, &local->interfaces, list)
2088 if (ieee80211_sdata_running(sdata))
2089 ieee80211_enable_keys(sdata);
2090
2091 /* Reconfigure sched scan if it was interrupted by FW restart */
2092 mutex_lock(&local->mtx);
2093 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2094 lockdep_is_held(&local->mtx));
2095 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2096 lockdep_is_held(&local->mtx));
2097 if (sched_scan_sdata && sched_scan_req)
2098 /*
2099 * Sched scan stopped, but we don't want to report it. Instead,
2100 * we're trying to reschedule. However, if more than one scan
2101 * plan was set, we cannot reschedule since we don't know which
2102 * scan plan was currently running (and some scan plans may have
2103 * already finished).
2104 */
2105 if (sched_scan_req->n_scan_plans > 1 ||
2106 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2107 sched_scan_req)) {
2108 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2109 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2110 sched_scan_stopped = true;
2111 }
2112 mutex_unlock(&local->mtx);
2113
2114 if (sched_scan_stopped)
2115 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2116
2117 wake_up:
2118 if (local->in_reconfig) {
2119 local->in_reconfig = false;
2120 barrier();
2121
2122 /* Restart deferred ROCs */
2123 mutex_lock(&local->mtx);
2124 ieee80211_start_next_roc(local);
2125 mutex_unlock(&local->mtx);
2126 }
2127
2128 if (local->monitors == local->open_count && local->monitors > 0)
2129 ieee80211_add_virtual_monitor(local);
2130
2131 /*
2132 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2133 * sessions can be established after a resume.
2134 *
2135 * Also tear down aggregation sessions since reconfiguring
2136 * them in a hardware restart scenario is not easily done
2137 * right now, and the hardware will have lost information
2138 * about the sessions, but we and the AP still think they
2139 * are active. This is really a workaround though.
2140 */
2141 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2142 mutex_lock(&local->sta_mtx);
2143
2144 list_for_each_entry(sta, &local->sta_list, list) {
2145 if (!local->resuming)
2146 ieee80211_sta_tear_down_BA_sessions(
2147 sta, AGG_STOP_LOCAL_REQUEST);
2148 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2149 }
2150
2151 mutex_unlock(&local->sta_mtx);
2152 }
2153
2154 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2155 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2156 false);
2157
2158 /*
2159 * If this is for hw restart things are still running.
2160 * We may want to change that later, however.
2161 */
2162 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2163 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2164
2165 if (!suspended)
2166 return 0;
2167
2168 #ifdef CONFIG_PM
2169 /* first set suspended false, then resuming */
2170 local->suspended = false;
2171 mb();
2172 local->resuming = false;
2173
2174 ieee80211_flush_completed_scan(local, false);
2175
2176 if (local->open_count && !reconfig_due_to_wowlan)
2177 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2178
2179 list_for_each_entry(sdata, &local->interfaces, list) {
2180 if (!ieee80211_sdata_running(sdata))
2181 continue;
2182 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2183 ieee80211_sta_restart(sdata);
2184 }
2185
2186 mod_timer(&local->sta_cleanup, jiffies + 1);
2187 #else
2188 WARN_ON(1);
2189 #endif
2190
2191 return 0;
2192 }
2193
2194 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2195 {
2196 struct ieee80211_sub_if_data *sdata;
2197 struct ieee80211_local *local;
2198 struct ieee80211_key *key;
2199
2200 if (WARN_ON(!vif))
2201 return;
2202
2203 sdata = vif_to_sdata(vif);
2204 local = sdata->local;
2205
2206 if (WARN_ON(!local->resuming))
2207 return;
2208
2209 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2210 return;
2211
2212 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2213
2214 mutex_lock(&local->key_mtx);
2215 list_for_each_entry(key, &sdata->key_list, list)
2216 key->flags |= KEY_FLAG_TAINTED;
2217 mutex_unlock(&local->key_mtx);
2218 }
2219 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2220
2221 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2222 {
2223 struct ieee80211_local *local = sdata->local;
2224 struct ieee80211_chanctx_conf *chanctx_conf;
2225 struct ieee80211_chanctx *chanctx;
2226
2227 mutex_lock(&local->chanctx_mtx);
2228
2229 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2230 lockdep_is_held(&local->chanctx_mtx));
2231
2232 /*
2233 * This function can be called from a work, thus it may be possible
2234 * that the chanctx_conf is removed (due to a disconnection, for
2235 * example).
2236 * So nothing should be done in such case.
2237 */
2238 if (!chanctx_conf)
2239 goto unlock;
2240
2241 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2242 ieee80211_recalc_smps_chanctx(local, chanctx);
2243 unlock:
2244 mutex_unlock(&local->chanctx_mtx);
2245 }
2246
2247 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2248 {
2249 struct ieee80211_local *local = sdata->local;
2250 struct ieee80211_chanctx_conf *chanctx_conf;
2251 struct ieee80211_chanctx *chanctx;
2252
2253 mutex_lock(&local->chanctx_mtx);
2254
2255 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2256 lockdep_is_held(&local->chanctx_mtx));
2257
2258 if (WARN_ON_ONCE(!chanctx_conf))
2259 goto unlock;
2260
2261 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2262 ieee80211_recalc_chanctx_min_def(local, chanctx);
2263 unlock:
2264 mutex_unlock(&local->chanctx_mtx);
2265 }
2266
2267 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2268 {
2269 size_t pos = offset;
2270
2271 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2272 pos += 2 + ies[pos + 1];
2273
2274 return pos;
2275 }
2276
2277 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2278 int rssi_min_thold,
2279 int rssi_max_thold)
2280 {
2281 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2282
2283 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2284 return;
2285
2286 /*
2287 * Scale up threshold values before storing it, as the RSSI averaging
2288 * algorithm uses a scaled up value as well. Change this scaling
2289 * factor if the RSSI averaging algorithm changes.
2290 */
2291 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2292 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2293 }
2294
2295 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2296 int rssi_min_thold,
2297 int rssi_max_thold)
2298 {
2299 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2300
2301 WARN_ON(rssi_min_thold == rssi_max_thold ||
2302 rssi_min_thold > rssi_max_thold);
2303
2304 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2305 rssi_max_thold);
2306 }
2307 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2308
2309 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2310 {
2311 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2312
2313 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2314 }
2315 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2316
2317 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2318 u16 cap)
2319 {
2320 __le16 tmp;
2321
2322 *pos++ = WLAN_EID_HT_CAPABILITY;
2323 *pos++ = sizeof(struct ieee80211_ht_cap);
2324 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2325
2326 /* capability flags */
2327 tmp = cpu_to_le16(cap);
2328 memcpy(pos, &tmp, sizeof(u16));
2329 pos += sizeof(u16);
2330
2331 /* AMPDU parameters */
2332 *pos++ = ht_cap->ampdu_factor |
2333 (ht_cap->ampdu_density <<
2334 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2335
2336 /* MCS set */
2337 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2338 pos += sizeof(ht_cap->mcs);
2339
2340 /* extended capabilities */
2341 pos += sizeof(__le16);
2342
2343 /* BF capabilities */
2344 pos += sizeof(__le32);
2345
2346 /* antenna selection */
2347 pos += sizeof(u8);
2348
2349 return pos;
2350 }
2351
2352 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2353 u32 cap)
2354 {
2355 __le32 tmp;
2356
2357 *pos++ = WLAN_EID_VHT_CAPABILITY;
2358 *pos++ = sizeof(struct ieee80211_vht_cap);
2359 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2360
2361 /* capability flags */
2362 tmp = cpu_to_le32(cap);
2363 memcpy(pos, &tmp, sizeof(u32));
2364 pos += sizeof(u32);
2365
2366 /* VHT MCS set */
2367 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2368 pos += sizeof(vht_cap->vht_mcs);
2369
2370 return pos;
2371 }
2372
2373 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2374 const struct cfg80211_chan_def *chandef,
2375 u16 prot_mode, bool rifs_mode)
2376 {
2377 struct ieee80211_ht_operation *ht_oper;
2378 /* Build HT Information */
2379 *pos++ = WLAN_EID_HT_OPERATION;
2380 *pos++ = sizeof(struct ieee80211_ht_operation);
2381 ht_oper = (struct ieee80211_ht_operation *)pos;
2382 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2383 chandef->chan->center_freq);
2384 switch (chandef->width) {
2385 case NL80211_CHAN_WIDTH_160:
2386 case NL80211_CHAN_WIDTH_80P80:
2387 case NL80211_CHAN_WIDTH_80:
2388 case NL80211_CHAN_WIDTH_40:
2389 if (chandef->center_freq1 > chandef->chan->center_freq)
2390 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2391 else
2392 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2393 break;
2394 default:
2395 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2396 break;
2397 }
2398 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2399 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2400 chandef->width != NL80211_CHAN_WIDTH_20)
2401 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2402
2403 if (rifs_mode)
2404 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2405
2406 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2407 ht_oper->stbc_param = 0x0000;
2408
2409 /* It seems that Basic MCS set and Supported MCS set
2410 are identical for the first 10 bytes */
2411 memset(&ht_oper->basic_set, 0, 16);
2412 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2413
2414 return pos + sizeof(struct ieee80211_ht_operation);
2415 }
2416
2417 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2418 const struct cfg80211_chan_def *chandef)
2419 {
2420 struct ieee80211_vht_operation *vht_oper;
2421
2422 *pos++ = WLAN_EID_VHT_OPERATION;
2423 *pos++ = sizeof(struct ieee80211_vht_operation);
2424 vht_oper = (struct ieee80211_vht_operation *)pos;
2425 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2426 chandef->center_freq1);
2427 if (chandef->center_freq2)
2428 vht_oper->center_freq_seg1_idx =
2429 ieee80211_frequency_to_channel(chandef->center_freq2);
2430 else
2431 vht_oper->center_freq_seg1_idx = 0x00;
2432
2433 switch (chandef->width) {
2434 case NL80211_CHAN_WIDTH_160:
2435 /*
2436 * Convert 160 MHz channel width to new style as interop
2437 * workaround.
2438 */
2439 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2440 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2441 if (chandef->chan->center_freq < chandef->center_freq1)
2442 vht_oper->center_freq_seg0_idx -= 8;
2443 else
2444 vht_oper->center_freq_seg0_idx += 8;
2445 break;
2446 case NL80211_CHAN_WIDTH_80P80:
2447 /*
2448 * Convert 80+80 MHz channel width to new style as interop
2449 * workaround.
2450 */
2451 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2452 break;
2453 case NL80211_CHAN_WIDTH_80:
2454 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2455 break;
2456 default:
2457 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2458 break;
2459 }
2460
2461 /* don't require special VHT peer rates */
2462 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2463
2464 return pos + sizeof(struct ieee80211_vht_operation);
2465 }
2466
2467 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2468 struct cfg80211_chan_def *chandef)
2469 {
2470 enum nl80211_channel_type channel_type;
2471
2472 if (!ht_oper)
2473 return false;
2474
2475 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2476 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2477 channel_type = NL80211_CHAN_HT20;
2478 break;
2479 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2480 channel_type = NL80211_CHAN_HT40PLUS;
2481 break;
2482 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2483 channel_type = NL80211_CHAN_HT40MINUS;
2484 break;
2485 default:
2486 channel_type = NL80211_CHAN_NO_HT;
2487 return false;
2488 }
2489
2490 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2491 return true;
2492 }
2493
2494 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2495 struct cfg80211_chan_def *chandef)
2496 {
2497 struct cfg80211_chan_def new = *chandef;
2498 int cf1, cf2;
2499
2500 if (!oper)
2501 return false;
2502
2503 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2504 chandef->chan->band);
2505 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2506 chandef->chan->band);
2507
2508 switch (oper->chan_width) {
2509 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2510 break;
2511 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2512 new.width = NL80211_CHAN_WIDTH_80;
2513 new.center_freq1 = cf1;
2514 /* If needed, adjust based on the newer interop workaround. */
2515 if (oper->center_freq_seg1_idx) {
2516 unsigned int diff;
2517
2518 diff = abs(oper->center_freq_seg1_idx -
2519 oper->center_freq_seg0_idx);
2520 if (diff == 8) {
2521 new.width = NL80211_CHAN_WIDTH_160;
2522 new.center_freq1 = cf2;
2523 } else if (diff > 8) {
2524 new.width = NL80211_CHAN_WIDTH_80P80;
2525 new.center_freq2 = cf2;
2526 }
2527 }
2528 break;
2529 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2530 new.width = NL80211_CHAN_WIDTH_160;
2531 new.center_freq1 = cf1;
2532 break;
2533 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2534 new.width = NL80211_CHAN_WIDTH_80P80;
2535 new.center_freq1 = cf1;
2536 new.center_freq2 = cf2;
2537 break;
2538 default:
2539 return false;
2540 }
2541
2542 if (!cfg80211_chandef_valid(&new))
2543 return false;
2544
2545 *chandef = new;
2546 return true;
2547 }
2548
2549 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2550 const struct ieee80211_supported_band *sband,
2551 const u8 *srates, int srates_len, u32 *rates)
2552 {
2553 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2554 int shift = ieee80211_chandef_get_shift(chandef);
2555 struct ieee80211_rate *br;
2556 int brate, rate, i, j, count = 0;
2557
2558 *rates = 0;
2559
2560 for (i = 0; i < srates_len; i++) {
2561 rate = srates[i] & 0x7f;
2562
2563 for (j = 0; j < sband->n_bitrates; j++) {
2564 br = &sband->bitrates[j];
2565 if ((rate_flags & br->flags) != rate_flags)
2566 continue;
2567
2568 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2569 if (brate == rate) {
2570 *rates |= BIT(j);
2571 count++;
2572 break;
2573 }
2574 }
2575 }
2576 return count;
2577 }
2578
2579 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2580 struct sk_buff *skb, bool need_basic,
2581 enum nl80211_band band)
2582 {
2583 struct ieee80211_local *local = sdata->local;
2584 struct ieee80211_supported_band *sband;
2585 int rate, shift;
2586 u8 i, rates, *pos;
2587 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2588 u32 rate_flags;
2589
2590 shift = ieee80211_vif_get_shift(&sdata->vif);
2591 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2592 sband = local->hw.wiphy->bands[band];
2593 rates = 0;
2594 for (i = 0; i < sband->n_bitrates; i++) {
2595 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2596 continue;
2597 rates++;
2598 }
2599 if (rates > 8)
2600 rates = 8;
2601
2602 if (skb_tailroom(skb) < rates + 2)
2603 return -ENOMEM;
2604
2605 pos = skb_put(skb, rates + 2);
2606 *pos++ = WLAN_EID_SUPP_RATES;
2607 *pos++ = rates;
2608 for (i = 0; i < rates; i++) {
2609 u8 basic = 0;
2610 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2611 continue;
2612
2613 if (need_basic && basic_rates & BIT(i))
2614 basic = 0x80;
2615 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2616 5 * (1 << shift));
2617 *pos++ = basic | (u8) rate;
2618 }
2619
2620 return 0;
2621 }
2622
2623 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2624 struct sk_buff *skb, bool need_basic,
2625 enum nl80211_band band)
2626 {
2627 struct ieee80211_local *local = sdata->local;
2628 struct ieee80211_supported_band *sband;
2629 int rate, shift;
2630 u8 i, exrates, *pos;
2631 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2632 u32 rate_flags;
2633
2634 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2635 shift = ieee80211_vif_get_shift(&sdata->vif);
2636
2637 sband = local->hw.wiphy->bands[band];
2638 exrates = 0;
2639 for (i = 0; i < sband->n_bitrates; i++) {
2640 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2641 continue;
2642 exrates++;
2643 }
2644
2645 if (exrates > 8)
2646 exrates -= 8;
2647 else
2648 exrates = 0;
2649
2650 if (skb_tailroom(skb) < exrates + 2)
2651 return -ENOMEM;
2652
2653 if (exrates) {
2654 pos = skb_put(skb, exrates + 2);
2655 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2656 *pos++ = exrates;
2657 for (i = 8; i < sband->n_bitrates; i++) {
2658 u8 basic = 0;
2659 if ((rate_flags & sband->bitrates[i].flags)
2660 != rate_flags)
2661 continue;
2662 if (need_basic && basic_rates & BIT(i))
2663 basic = 0x80;
2664 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2665 5 * (1 << shift));
2666 *pos++ = basic | (u8) rate;
2667 }
2668 }
2669 return 0;
2670 }
2671
2672 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2673 {
2674 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2675 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2676
2677 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2678 /* non-managed type inferfaces */
2679 return 0;
2680 }
2681 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2682 }
2683 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2684
2685 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2686 {
2687 if (!mcs)
2688 return 1;
2689
2690 /* TODO: consider rx_highest */
2691
2692 if (mcs->rx_mask[3])
2693 return 4;
2694 if (mcs->rx_mask[2])
2695 return 3;
2696 if (mcs->rx_mask[1])
2697 return 2;
2698 return 1;
2699 }
2700
2701 /**
2702 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2703 * @local: mac80211 hw info struct
2704 * @status: RX status
2705 * @mpdu_len: total MPDU length (including FCS)
2706 * @mpdu_offset: offset into MPDU to calculate timestamp at
2707 *
2708 * This function calculates the RX timestamp at the given MPDU offset, taking
2709 * into account what the RX timestamp was. An offset of 0 will just normalize
2710 * the timestamp to TSF at beginning of MPDU reception.
2711 */
2712 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2713 struct ieee80211_rx_status *status,
2714 unsigned int mpdu_len,
2715 unsigned int mpdu_offset)
2716 {
2717 u64 ts = status->mactime;
2718 struct rate_info ri;
2719 u16 rate;
2720
2721 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2722 return 0;
2723
2724 memset(&ri, 0, sizeof(ri));
2725
2726 /* Fill cfg80211 rate info */
2727 switch (status->encoding) {
2728 case RX_ENC_HT:
2729 ri.mcs = status->rate_idx;
2730 ri.flags |= RATE_INFO_FLAGS_MCS;
2731 ri.bw = status->bw;
2732 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2733 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2734 break;
2735 case RX_ENC_VHT:
2736 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2737 ri.mcs = status->rate_idx;
2738 ri.nss = status->nss;
2739 ri.bw = status->bw;
2740 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2741 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2742 break;
2743 default:
2744 WARN_ON(1);
2745 /* fall through */
2746 case RX_ENC_LEGACY: {
2747 struct ieee80211_supported_band *sband;
2748 int shift = 0;
2749 int bitrate;
2750
2751 ri.bw = status->bw;
2752
2753 switch (status->bw) {
2754 case RATE_INFO_BW_10:
2755 shift = 1;
2756 break;
2757 case RATE_INFO_BW_5:
2758 shift = 2;
2759 break;
2760 }
2761
2762 sband = local->hw.wiphy->bands[status->band];
2763 bitrate = sband->bitrates[status->rate_idx].bitrate;
2764 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2765
2766 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2767 /* TODO: handle HT/VHT preambles */
2768 if (status->band == NL80211_BAND_5GHZ) {
2769 ts += 20 << shift;
2770 mpdu_offset += 2;
2771 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2772 ts += 96;
2773 } else {
2774 ts += 192;
2775 }
2776 }
2777 break;
2778 }
2779 }
2780
2781 rate = cfg80211_calculate_bitrate(&ri);
2782 if (WARN_ONCE(!rate,
2783 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2784 (unsigned long long)status->flag, status->rate_idx,
2785 status->nss))
2786 return 0;
2787
2788 /* rewind from end of MPDU */
2789 if (status->flag & RX_FLAG_MACTIME_END)
2790 ts -= mpdu_len * 8 * 10 / rate;
2791
2792 ts += mpdu_offset * 8 * 10 / rate;
2793
2794 return ts;
2795 }
2796
2797 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2798 {
2799 struct ieee80211_sub_if_data *sdata;
2800 struct cfg80211_chan_def chandef;
2801
2802 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2803 ASSERT_RTNL();
2804
2805 mutex_lock(&local->mtx);
2806 list_for_each_entry(sdata, &local->interfaces, list) {
2807 /* it might be waiting for the local->mtx, but then
2808 * by the time it gets it, sdata->wdev.cac_started
2809 * will no longer be true
2810 */
2811 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2812
2813 if (sdata->wdev.cac_started) {
2814 chandef = sdata->vif.bss_conf.chandef;
2815 ieee80211_vif_release_channel(sdata);
2816 cfg80211_cac_event(sdata->dev,
2817 &chandef,
2818 NL80211_RADAR_CAC_ABORTED,
2819 GFP_KERNEL);
2820 }
2821 }
2822 mutex_unlock(&local->mtx);
2823 }
2824
2825 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2826 {
2827 struct ieee80211_local *local =
2828 container_of(work, struct ieee80211_local, radar_detected_work);
2829 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2830 struct ieee80211_chanctx *ctx;
2831 int num_chanctx = 0;
2832
2833 mutex_lock(&local->chanctx_mtx);
2834 list_for_each_entry(ctx, &local->chanctx_list, list) {
2835 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2836 continue;
2837
2838 num_chanctx++;
2839 chandef = ctx->conf.def;
2840 }
2841 mutex_unlock(&local->chanctx_mtx);
2842
2843 rtnl_lock();
2844 ieee80211_dfs_cac_cancel(local);
2845 rtnl_unlock();
2846
2847 if (num_chanctx > 1)
2848 /* XXX: multi-channel is not supported yet */
2849 WARN_ON(1);
2850 else
2851 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2852 }
2853
2854 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2855 {
2856 struct ieee80211_local *local = hw_to_local(hw);
2857
2858 trace_api_radar_detected(local);
2859
2860 schedule_work(&local->radar_detected_work);
2861 }
2862 EXPORT_SYMBOL(ieee80211_radar_detected);
2863
2864 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2865 {
2866 u32 ret;
2867 int tmp;
2868
2869 switch (c->width) {
2870 case NL80211_CHAN_WIDTH_20:
2871 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2872 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2873 break;
2874 case NL80211_CHAN_WIDTH_40:
2875 c->width = NL80211_CHAN_WIDTH_20;
2876 c->center_freq1 = c->chan->center_freq;
2877 ret = IEEE80211_STA_DISABLE_40MHZ |
2878 IEEE80211_STA_DISABLE_VHT;
2879 break;
2880 case NL80211_CHAN_WIDTH_80:
2881 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2882 /* n_P40 */
2883 tmp /= 2;
2884 /* freq_P40 */
2885 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2886 c->width = NL80211_CHAN_WIDTH_40;
2887 ret = IEEE80211_STA_DISABLE_VHT;
2888 break;
2889 case NL80211_CHAN_WIDTH_80P80:
2890 c->center_freq2 = 0;
2891 c->width = NL80211_CHAN_WIDTH_80;
2892 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2893 IEEE80211_STA_DISABLE_160MHZ;
2894 break;
2895 case NL80211_CHAN_WIDTH_160:
2896 /* n_P20 */
2897 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2898 /* n_P80 */
2899 tmp /= 4;
2900 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2901 c->width = NL80211_CHAN_WIDTH_80;
2902 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2903 IEEE80211_STA_DISABLE_160MHZ;
2904 break;
2905 default:
2906 case NL80211_CHAN_WIDTH_20_NOHT:
2907 WARN_ON_ONCE(1);
2908 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2909 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2910 break;
2911 case NL80211_CHAN_WIDTH_5:
2912 case NL80211_CHAN_WIDTH_10:
2913 WARN_ON_ONCE(1);
2914 /* keep c->width */
2915 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2916 break;
2917 }
2918
2919 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2920
2921 return ret;
2922 }
2923
2924 /*
2925 * Returns true if smps_mode_new is strictly more restrictive than
2926 * smps_mode_old.
2927 */
2928 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2929 enum ieee80211_smps_mode smps_mode_new)
2930 {
2931 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2932 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2933 return false;
2934
2935 switch (smps_mode_old) {
2936 case IEEE80211_SMPS_STATIC:
2937 return false;
2938 case IEEE80211_SMPS_DYNAMIC:
2939 return smps_mode_new == IEEE80211_SMPS_STATIC;
2940 case IEEE80211_SMPS_OFF:
2941 return smps_mode_new != IEEE80211_SMPS_OFF;
2942 default:
2943 WARN_ON(1);
2944 }
2945
2946 return false;
2947 }
2948
2949 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2950 struct cfg80211_csa_settings *csa_settings)
2951 {
2952 struct sk_buff *skb;
2953 struct ieee80211_mgmt *mgmt;
2954 struct ieee80211_local *local = sdata->local;
2955 int freq;
2956 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2957 sizeof(mgmt->u.action.u.chan_switch);
2958 u8 *pos;
2959
2960 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2961 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2962 return -EOPNOTSUPP;
2963
2964 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2965 5 + /* channel switch announcement element */
2966 3 + /* secondary channel offset element */
2967 8); /* mesh channel switch parameters element */
2968 if (!skb)
2969 return -ENOMEM;
2970
2971 skb_reserve(skb, local->tx_headroom);
2972 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2973 memset(mgmt, 0, hdr_len);
2974 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2975 IEEE80211_STYPE_ACTION);
2976
2977 eth_broadcast_addr(mgmt->da);
2978 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2979 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2980 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2981 } else {
2982 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2983 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2984 }
2985 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2986 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2987 pos = skb_put(skb, 5);
2988 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2989 *pos++ = 3; /* IE length */
2990 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2991 freq = csa_settings->chandef.chan->center_freq;
2992 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2993 *pos++ = csa_settings->count; /* count */
2994
2995 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2996 enum nl80211_channel_type ch_type;
2997
2998 skb_put(skb, 3);
2999 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3000 *pos++ = 1; /* IE length */
3001 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3002 if (ch_type == NL80211_CHAN_HT40PLUS)
3003 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3004 else
3005 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3006 }
3007
3008 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3009 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3010
3011 skb_put(skb, 8);
3012 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3013 *pos++ = 6; /* IE length */
3014 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3015 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3016 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3017 *pos++ |= csa_settings->block_tx ?
3018 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3019 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3020 pos += 2;
3021 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3022 pos += 2;
3023 }
3024
3025 ieee80211_tx_skb(sdata, skb);
3026 return 0;
3027 }
3028
3029 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3030 {
3031 return !(cs == NULL || cs->cipher == 0 ||
3032 cs->hdr_len < cs->pn_len + cs->pn_off ||
3033 cs->hdr_len <= cs->key_idx_off ||
3034 cs->key_idx_shift > 7 ||
3035 cs->key_idx_mask == 0);
3036 }
3037
3038 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3039 {
3040 int i;
3041
3042 /* Ensure we have enough iftype bitmap space for all iftype values */
3043 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3044
3045 for (i = 0; i < n; i++)
3046 if (!ieee80211_cs_valid(&cs[i]))
3047 return false;
3048
3049 return true;
3050 }
3051
3052 const struct ieee80211_cipher_scheme *
3053 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3054 enum nl80211_iftype iftype)
3055 {
3056 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3057 int n = local->hw.n_cipher_schemes;
3058 int i;
3059 const struct ieee80211_cipher_scheme *cs = NULL;
3060
3061 for (i = 0; i < n; i++) {
3062 if (l[i].cipher == cipher) {
3063 cs = &l[i];
3064 break;
3065 }
3066 }
3067
3068 if (!cs || !(cs->iftype & BIT(iftype)))
3069 return NULL;
3070
3071 return cs;
3072 }
3073
3074 int ieee80211_cs_headroom(struct ieee80211_local *local,
3075 struct cfg80211_crypto_settings *crypto,
3076 enum nl80211_iftype iftype)
3077 {
3078 const struct ieee80211_cipher_scheme *cs;
3079 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3080 int i;
3081
3082 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3083 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3084 iftype);
3085
3086 if (cs && headroom < cs->hdr_len)
3087 headroom = cs->hdr_len;
3088 }
3089
3090 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3091 if (cs && headroom < cs->hdr_len)
3092 headroom = cs->hdr_len;
3093
3094 return headroom;
3095 }
3096
3097 static bool
3098 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3099 {
3100 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3101 int skip;
3102
3103 if (end > 0)
3104 return false;
3105
3106 /* One shot NOA */
3107 if (data->count[i] == 1)
3108 return false;
3109
3110 if (data->desc[i].interval == 0)
3111 return false;
3112
3113 /* End time is in the past, check for repetitions */
3114 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3115 if (data->count[i] < 255) {
3116 if (data->count[i] <= skip) {
3117 data->count[i] = 0;
3118 return false;
3119 }
3120
3121 data->count[i] -= skip;
3122 }
3123
3124 data->desc[i].start += skip * data->desc[i].interval;
3125
3126 return true;
3127 }
3128
3129 static bool
3130 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3131 s32 *offset)
3132 {
3133 bool ret = false;
3134 int i;
3135
3136 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3137 s32 cur;
3138
3139 if (!data->count[i])
3140 continue;
3141
3142 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3143 ret = true;
3144
3145 cur = data->desc[i].start - tsf;
3146 if (cur > *offset)
3147 continue;
3148
3149 cur = data->desc[i].start + data->desc[i].duration - tsf;
3150 if (cur > *offset)
3151 *offset = cur;
3152 }
3153
3154 return ret;
3155 }
3156
3157 static u32
3158 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3159 {
3160 s32 offset = 0;
3161 int tries = 0;
3162 /*
3163 * arbitrary limit, used to avoid infinite loops when combined NoA
3164 * descriptors cover the full time period.
3165 */
3166 int max_tries = 5;
3167
3168 ieee80211_extend_absent_time(data, tsf, &offset);
3169 do {
3170 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3171 break;
3172
3173 tries++;
3174 } while (tries < max_tries);
3175
3176 return offset;
3177 }
3178
3179 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3180 {
3181 u32 next_offset = BIT(31) - 1;
3182 int i;
3183
3184 data->absent = 0;
3185 data->has_next_tsf = false;
3186 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3187 s32 start;
3188
3189 if (!data->count[i])
3190 continue;
3191
3192 ieee80211_extend_noa_desc(data, tsf, i);
3193 start = data->desc[i].start - tsf;
3194 if (start <= 0)
3195 data->absent |= BIT(i);
3196
3197 if (next_offset > start)
3198 next_offset = start;
3199
3200 data->has_next_tsf = true;
3201 }
3202
3203 if (data->absent)
3204 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3205
3206 data->next_tsf = tsf + next_offset;
3207 }
3208 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3209
3210 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3211 struct ieee80211_noa_data *data, u32 tsf)
3212 {
3213 int ret = 0;
3214 int i;
3215
3216 memset(data, 0, sizeof(*data));
3217
3218 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3219 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3220
3221 if (!desc->count || !desc->duration)
3222 continue;
3223
3224 data->count[i] = desc->count;
3225 data->desc[i].start = le32_to_cpu(desc->start_time);
3226 data->desc[i].duration = le32_to_cpu(desc->duration);
3227 data->desc[i].interval = le32_to_cpu(desc->interval);
3228
3229 if (data->count[i] > 1 &&
3230 data->desc[i].interval < data->desc[i].duration)
3231 continue;
3232
3233 ieee80211_extend_noa_desc(data, tsf, i);
3234 ret++;
3235 }
3236
3237 if (ret)
3238 ieee80211_update_p2p_noa(data, tsf);
3239
3240 return ret;
3241 }
3242 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3243
3244 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3245 struct ieee80211_sub_if_data *sdata)
3246 {
3247 u64 tsf = drv_get_tsf(local, sdata);
3248 u64 dtim_count = 0;
3249 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3250 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3251 struct ps_data *ps;
3252 u8 bcns_from_dtim;
3253
3254 if (tsf == -1ULL || !beacon_int || !dtim_period)
3255 return;
3256
3257 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3258 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3259 if (!sdata->bss)
3260 return;
3261
3262 ps = &sdata->bss->ps;
3263 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3264 ps = &sdata->u.mesh.ps;
3265 } else {
3266 return;
3267 }
3268
3269 /*
3270 * actually finds last dtim_count, mac80211 will update in
3271 * __beacon_add_tim().
3272 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3273 */
3274 do_div(tsf, beacon_int);
3275 bcns_from_dtim = do_div(tsf, dtim_period);
3276 /* just had a DTIM */
3277 if (!bcns_from_dtim)
3278 dtim_count = 0;
3279 else
3280 dtim_count = dtim_period - bcns_from_dtim;
3281
3282 ps->dtim_count = dtim_count;
3283 }
3284
3285 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3286 struct ieee80211_chanctx *ctx)
3287 {
3288 struct ieee80211_sub_if_data *sdata;
3289 u8 radar_detect = 0;
3290
3291 lockdep_assert_held(&local->chanctx_mtx);
3292
3293 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3294 return 0;
3295
3296 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3297 if (sdata->reserved_radar_required)
3298 radar_detect |= BIT(sdata->reserved_chandef.width);
3299
3300 /*
3301 * An in-place reservation context should not have any assigned vifs
3302 * until it replaces the other context.
3303 */
3304 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3305 !list_empty(&ctx->assigned_vifs));
3306
3307 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3308 if (sdata->radar_required)
3309 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3310
3311 return radar_detect;
3312 }
3313
3314 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3315 const struct cfg80211_chan_def *chandef,
3316 enum ieee80211_chanctx_mode chanmode,
3317 u8 radar_detect)
3318 {
3319 struct ieee80211_local *local = sdata->local;
3320 struct ieee80211_sub_if_data *sdata_iter;
3321 enum nl80211_iftype iftype = sdata->wdev.iftype;
3322 struct ieee80211_chanctx *ctx;
3323 int total = 1;
3324 struct iface_combination_params params = {
3325 .radar_detect = radar_detect,
3326 };
3327
3328 lockdep_assert_held(&local->chanctx_mtx);
3329
3330 if (WARN_ON(hweight32(radar_detect) > 1))
3331 return -EINVAL;
3332
3333 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3334 !chandef->chan))
3335 return -EINVAL;
3336
3337 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3338 return -EINVAL;
3339
3340 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3341 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3342 /*
3343 * always passing this is harmless, since it'll be the
3344 * same value that cfg80211 finds if it finds the same
3345 * interface ... and that's always allowed
3346 */
3347 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3348 }
3349
3350 /* Always allow software iftypes */
3351 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3352 if (radar_detect)
3353 return -EINVAL;
3354 return 0;
3355 }
3356
3357 if (chandef)
3358 params.num_different_channels = 1;
3359
3360 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3361 params.iftype_num[iftype] = 1;
3362
3363 list_for_each_entry(ctx, &local->chanctx_list, list) {
3364 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3365 continue;
3366 params.radar_detect |=
3367 ieee80211_chanctx_radar_detect(local, ctx);
3368 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3369 params.num_different_channels++;
3370 continue;
3371 }
3372 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3373 cfg80211_chandef_compatible(chandef,
3374 &ctx->conf.def))
3375 continue;
3376 params.num_different_channels++;
3377 }
3378
3379 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3380 struct wireless_dev *wdev_iter;
3381
3382 wdev_iter = &sdata_iter->wdev;
3383
3384 if (sdata_iter == sdata ||
3385 !ieee80211_sdata_running(sdata_iter) ||
3386 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3387 continue;
3388
3389 params.iftype_num[wdev_iter->iftype]++;
3390 total++;
3391 }
3392
3393 if (total == 1 && !params.radar_detect)
3394 return 0;
3395
3396 return cfg80211_check_combinations(local->hw.wiphy, &params);
3397 }
3398
3399 static void
3400 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3401 void *data)
3402 {
3403 u32 *max_num_different_channels = data;
3404
3405 *max_num_different_channels = max(*max_num_different_channels,
3406 c->num_different_channels);
3407 }
3408
3409 int ieee80211_max_num_channels(struct ieee80211_local *local)
3410 {
3411 struct ieee80211_sub_if_data *sdata;
3412 struct ieee80211_chanctx *ctx;
3413 u32 max_num_different_channels = 1;
3414 int err;
3415 struct iface_combination_params params = {0};
3416
3417 lockdep_assert_held(&local->chanctx_mtx);
3418
3419 list_for_each_entry(ctx, &local->chanctx_list, list) {
3420 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3421 continue;
3422
3423 params.num_different_channels++;
3424
3425 params.radar_detect |=
3426 ieee80211_chanctx_radar_detect(local, ctx);
3427 }
3428
3429 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3430 params.iftype_num[sdata->wdev.iftype]++;
3431
3432 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3433 ieee80211_iter_max_chans,
3434 &max_num_different_channels);
3435 if (err < 0)
3436 return err;
3437
3438 return max_num_different_channels;
3439 }
3440
3441 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3442 {
3443 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3444 *buf++ = 7; /* len */
3445 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3446 *buf++ = 0x50;
3447 *buf++ = 0xf2;
3448 *buf++ = 2; /* WME */
3449 *buf++ = 0; /* WME info */
3450 *buf++ = 1; /* WME ver */
3451 *buf++ = qosinfo; /* U-APSD no in use */
3452
3453 return buf;
3454 }
3455
3456 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3457 unsigned long *frame_cnt,
3458 unsigned long *byte_cnt)
3459 {
3460 struct txq_info *txqi = to_txq_info(txq);
3461 u32 frag_cnt = 0, frag_bytes = 0;
3462 struct sk_buff *skb;
3463
3464 skb_queue_walk(&txqi->frags, skb) {
3465 frag_cnt++;
3466 frag_bytes += skb->len;
3467 }
3468
3469 if (frame_cnt)
3470 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3471
3472 if (byte_cnt)
3473 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3474 }
3475 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3476
3477 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3478 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3479 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3480 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3481 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3482 };
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