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Merge tag 'powerpc-4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
[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 = skb_put_zero(skb, 24 + 6);
1246 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1247 IEEE80211_STYPE_AUTH);
1248 memcpy(mgmt->da, da, ETH_ALEN);
1249 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1250 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1251 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1252 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1253 mgmt->u.auth.status_code = cpu_to_le16(status);
1254 if (extra)
1255 skb_put_data(skb, extra, extra_len);
1256
1257 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1258 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1259 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1260 WARN_ON(err);
1261 }
1262
1263 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1264 tx_flags;
1265 ieee80211_tx_skb(sdata, skb);
1266 }
1267
1268 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1269 const u8 *bssid, u16 stype, u16 reason,
1270 bool send_frame, u8 *frame_buf)
1271 {
1272 struct ieee80211_local *local = sdata->local;
1273 struct sk_buff *skb;
1274 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1275
1276 /* build frame */
1277 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1278 mgmt->duration = 0; /* initialize only */
1279 mgmt->seq_ctrl = 0; /* initialize only */
1280 memcpy(mgmt->da, bssid, ETH_ALEN);
1281 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1282 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1283 /* u.deauth.reason_code == u.disassoc.reason_code */
1284 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1285
1286 if (send_frame) {
1287 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1288 IEEE80211_DEAUTH_FRAME_LEN);
1289 if (!skb)
1290 return;
1291
1292 skb_reserve(skb, local->hw.extra_tx_headroom);
1293
1294 /* copy in frame */
1295 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1296
1297 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1298 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1299 IEEE80211_SKB_CB(skb)->flags |=
1300 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1301
1302 ieee80211_tx_skb(sdata, skb);
1303 }
1304 }
1305
1306 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1307 u8 *buffer, size_t buffer_len,
1308 const u8 *ie, size_t ie_len,
1309 enum nl80211_band band,
1310 u32 rate_mask,
1311 struct cfg80211_chan_def *chandef,
1312 size_t *offset)
1313 {
1314 struct ieee80211_supported_band *sband;
1315 u8 *pos = buffer, *end = buffer + buffer_len;
1316 size_t noffset;
1317 int supp_rates_len, i;
1318 u8 rates[32];
1319 int num_rates;
1320 int ext_rates_len;
1321 int shift;
1322 u32 rate_flags;
1323 bool have_80mhz = false;
1324
1325 *offset = 0;
1326
1327 sband = local->hw.wiphy->bands[band];
1328 if (WARN_ON_ONCE(!sband))
1329 return 0;
1330
1331 rate_flags = ieee80211_chandef_rate_flags(chandef);
1332 shift = ieee80211_chandef_get_shift(chandef);
1333
1334 num_rates = 0;
1335 for (i = 0; i < sband->n_bitrates; i++) {
1336 if ((BIT(i) & rate_mask) == 0)
1337 continue; /* skip rate */
1338 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1339 continue;
1340
1341 rates[num_rates++] =
1342 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1343 (1 << shift) * 5);
1344 }
1345
1346 supp_rates_len = min_t(int, num_rates, 8);
1347
1348 if (end - pos < 2 + supp_rates_len)
1349 goto out_err;
1350 *pos++ = WLAN_EID_SUPP_RATES;
1351 *pos++ = supp_rates_len;
1352 memcpy(pos, rates, supp_rates_len);
1353 pos += supp_rates_len;
1354
1355 /* insert "request information" if in custom IEs */
1356 if (ie && ie_len) {
1357 static const u8 before_extrates[] = {
1358 WLAN_EID_SSID,
1359 WLAN_EID_SUPP_RATES,
1360 WLAN_EID_REQUEST,
1361 };
1362 noffset = ieee80211_ie_split(ie, ie_len,
1363 before_extrates,
1364 ARRAY_SIZE(before_extrates),
1365 *offset);
1366 if (end - pos < noffset - *offset)
1367 goto out_err;
1368 memcpy(pos, ie + *offset, noffset - *offset);
1369 pos += noffset - *offset;
1370 *offset = noffset;
1371 }
1372
1373 ext_rates_len = num_rates - supp_rates_len;
1374 if (ext_rates_len > 0) {
1375 if (end - pos < 2 + ext_rates_len)
1376 goto out_err;
1377 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1378 *pos++ = ext_rates_len;
1379 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1380 pos += ext_rates_len;
1381 }
1382
1383 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1384 if (end - pos < 3)
1385 goto out_err;
1386 *pos++ = WLAN_EID_DS_PARAMS;
1387 *pos++ = 1;
1388 *pos++ = ieee80211_frequency_to_channel(
1389 chandef->chan->center_freq);
1390 }
1391
1392 /* insert custom IEs that go before HT */
1393 if (ie && ie_len) {
1394 static const u8 before_ht[] = {
1395 WLAN_EID_SSID,
1396 WLAN_EID_SUPP_RATES,
1397 WLAN_EID_REQUEST,
1398 WLAN_EID_EXT_SUPP_RATES,
1399 WLAN_EID_DS_PARAMS,
1400 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1401 };
1402 noffset = ieee80211_ie_split(ie, ie_len,
1403 before_ht, ARRAY_SIZE(before_ht),
1404 *offset);
1405 if (end - pos < noffset - *offset)
1406 goto out_err;
1407 memcpy(pos, ie + *offset, noffset - *offset);
1408 pos += noffset - *offset;
1409 *offset = noffset;
1410 }
1411
1412 if (sband->ht_cap.ht_supported) {
1413 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1414 goto out_err;
1415 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1416 sband->ht_cap.cap);
1417 }
1418
1419 /*
1420 * If adding more here, adjust code in main.c
1421 * that calculates local->scan_ies_len.
1422 */
1423
1424 /* insert custom IEs that go before VHT */
1425 if (ie && ie_len) {
1426 static const u8 before_vht[] = {
1427 WLAN_EID_SSID,
1428 WLAN_EID_SUPP_RATES,
1429 WLAN_EID_REQUEST,
1430 WLAN_EID_EXT_SUPP_RATES,
1431 WLAN_EID_DS_PARAMS,
1432 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1433 WLAN_EID_HT_CAPABILITY,
1434 WLAN_EID_BSS_COEX_2040,
1435 WLAN_EID_EXT_CAPABILITY,
1436 WLAN_EID_SSID_LIST,
1437 WLAN_EID_CHANNEL_USAGE,
1438 WLAN_EID_INTERWORKING,
1439 /* mesh ID can't happen here */
1440 /* 60 GHz can't happen here right now */
1441 };
1442 noffset = ieee80211_ie_split(ie, ie_len,
1443 before_vht, ARRAY_SIZE(before_vht),
1444 *offset);
1445 if (end - pos < noffset - *offset)
1446 goto out_err;
1447 memcpy(pos, ie + *offset, noffset - *offset);
1448 pos += noffset - *offset;
1449 *offset = noffset;
1450 }
1451
1452 /* Check if any channel in this sband supports at least 80 MHz */
1453 for (i = 0; i < sband->n_channels; i++) {
1454 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1455 IEEE80211_CHAN_NO_80MHZ))
1456 continue;
1457
1458 have_80mhz = true;
1459 break;
1460 }
1461
1462 if (sband->vht_cap.vht_supported && have_80mhz) {
1463 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1464 goto out_err;
1465 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1466 sband->vht_cap.cap);
1467 }
1468
1469 return pos - buffer;
1470 out_err:
1471 WARN_ONCE(1, "not enough space for preq IEs\n");
1472 return pos - buffer;
1473 }
1474
1475 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1476 size_t buffer_len,
1477 struct ieee80211_scan_ies *ie_desc,
1478 const u8 *ie, size_t ie_len,
1479 u8 bands_used, u32 *rate_masks,
1480 struct cfg80211_chan_def *chandef)
1481 {
1482 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1483 int i;
1484
1485 memset(ie_desc, 0, sizeof(*ie_desc));
1486
1487 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1488 if (bands_used & BIT(i)) {
1489 pos += ieee80211_build_preq_ies_band(local,
1490 buffer + pos,
1491 buffer_len - pos,
1492 ie, ie_len, i,
1493 rate_masks[i],
1494 chandef,
1495 &custom_ie_offset);
1496 ie_desc->ies[i] = buffer + old_pos;
1497 ie_desc->len[i] = pos - old_pos;
1498 old_pos = pos;
1499 }
1500 }
1501
1502 /* add any remaining custom IEs */
1503 if (ie && ie_len) {
1504 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1505 "not enough space for preq custom IEs\n"))
1506 return pos;
1507 memcpy(buffer + pos, ie + custom_ie_offset,
1508 ie_len - custom_ie_offset);
1509 ie_desc->common_ies = buffer + pos;
1510 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1511 pos += ie_len - custom_ie_offset;
1512 }
1513
1514 return pos;
1515 };
1516
1517 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1518 const u8 *src, const u8 *dst,
1519 u32 ratemask,
1520 struct ieee80211_channel *chan,
1521 const u8 *ssid, size_t ssid_len,
1522 const u8 *ie, size_t ie_len,
1523 bool directed)
1524 {
1525 struct ieee80211_local *local = sdata->local;
1526 struct cfg80211_chan_def chandef;
1527 struct sk_buff *skb;
1528 struct ieee80211_mgmt *mgmt;
1529 int ies_len;
1530 u32 rate_masks[NUM_NL80211_BANDS] = {};
1531 struct ieee80211_scan_ies dummy_ie_desc;
1532
1533 /*
1534 * Do not send DS Channel parameter for directed probe requests
1535 * in order to maximize the chance that we get a response. Some
1536 * badly-behaved APs don't respond when this parameter is included.
1537 */
1538 chandef.width = sdata->vif.bss_conf.chandef.width;
1539 if (directed)
1540 chandef.chan = NULL;
1541 else
1542 chandef.chan = chan;
1543
1544 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1545 100 + ie_len);
1546 if (!skb)
1547 return NULL;
1548
1549 rate_masks[chan->band] = ratemask;
1550 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1551 skb_tailroom(skb), &dummy_ie_desc,
1552 ie, ie_len, BIT(chan->band),
1553 rate_masks, &chandef);
1554 skb_put(skb, ies_len);
1555
1556 if (dst) {
1557 mgmt = (struct ieee80211_mgmt *) skb->data;
1558 memcpy(mgmt->da, dst, ETH_ALEN);
1559 memcpy(mgmt->bssid, dst, ETH_ALEN);
1560 }
1561
1562 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1563
1564 return skb;
1565 }
1566
1567 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1568 const u8 *src, const u8 *dst,
1569 const u8 *ssid, size_t ssid_len,
1570 const u8 *ie, size_t ie_len,
1571 u32 ratemask, bool directed, u32 tx_flags,
1572 struct ieee80211_channel *channel, bool scan)
1573 {
1574 struct sk_buff *skb;
1575
1576 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1577 ssid, ssid_len,
1578 ie, ie_len, directed);
1579 if (skb) {
1580 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1581 if (scan)
1582 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1583 else
1584 ieee80211_tx_skb(sdata, skb);
1585 }
1586 }
1587
1588 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1589 struct ieee802_11_elems *elems,
1590 enum nl80211_band band, u32 *basic_rates)
1591 {
1592 struct ieee80211_supported_band *sband;
1593 size_t num_rates;
1594 u32 supp_rates, rate_flags;
1595 int i, j, shift;
1596
1597 sband = sdata->local->hw.wiphy->bands[band];
1598 if (WARN_ON(!sband))
1599 return 1;
1600
1601 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1602 shift = ieee80211_vif_get_shift(&sdata->vif);
1603
1604 num_rates = sband->n_bitrates;
1605 supp_rates = 0;
1606 for (i = 0; i < elems->supp_rates_len +
1607 elems->ext_supp_rates_len; i++) {
1608 u8 rate = 0;
1609 int own_rate;
1610 bool is_basic;
1611 if (i < elems->supp_rates_len)
1612 rate = elems->supp_rates[i];
1613 else if (elems->ext_supp_rates)
1614 rate = elems->ext_supp_rates
1615 [i - elems->supp_rates_len];
1616 own_rate = 5 * (rate & 0x7f);
1617 is_basic = !!(rate & 0x80);
1618
1619 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1620 continue;
1621
1622 for (j = 0; j < num_rates; j++) {
1623 int brate;
1624 if ((rate_flags & sband->bitrates[j].flags)
1625 != rate_flags)
1626 continue;
1627
1628 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1629 1 << shift);
1630
1631 if (brate == own_rate) {
1632 supp_rates |= BIT(j);
1633 if (basic_rates && is_basic)
1634 *basic_rates |= BIT(j);
1635 }
1636 }
1637 }
1638 return supp_rates;
1639 }
1640
1641 void ieee80211_stop_device(struct ieee80211_local *local)
1642 {
1643 ieee80211_led_radio(local, false);
1644 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1645
1646 cancel_work_sync(&local->reconfig_filter);
1647
1648 flush_workqueue(local->workqueue);
1649 drv_stop(local);
1650 }
1651
1652 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1653 bool aborted)
1654 {
1655 /* It's possible that we don't handle the scan completion in
1656 * time during suspend, so if it's still marked as completed
1657 * here, queue the work and flush it to clean things up.
1658 * Instead of calling the worker function directly here, we
1659 * really queue it to avoid potential races with other flows
1660 * scheduling the same work.
1661 */
1662 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1663 /* If coming from reconfiguration failure, abort the scan so
1664 * we don't attempt to continue a partial HW scan - which is
1665 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1666 * completed scan, and a 5 GHz portion is still pending.
1667 */
1668 if (aborted)
1669 set_bit(SCAN_ABORTED, &local->scanning);
1670 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1671 flush_delayed_work(&local->scan_work);
1672 }
1673 }
1674
1675 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1676 {
1677 struct ieee80211_sub_if_data *sdata;
1678 struct ieee80211_chanctx *ctx;
1679
1680 /*
1681 * We get here if during resume the device can't be restarted properly.
1682 * We might also get here if this happens during HW reset, which is a
1683 * slightly different situation and we need to drop all connections in
1684 * the latter case.
1685 *
1686 * Ask cfg80211 to turn off all interfaces, this will result in more
1687 * warnings but at least we'll then get into a clean stopped state.
1688 */
1689
1690 local->resuming = false;
1691 local->suspended = false;
1692 local->in_reconfig = false;
1693
1694 ieee80211_flush_completed_scan(local, true);
1695
1696 /* scheduled scan clearly can't be running any more, but tell
1697 * cfg80211 and clear local state
1698 */
1699 ieee80211_sched_scan_end(local);
1700
1701 list_for_each_entry(sdata, &local->interfaces, list)
1702 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1703
1704 /* Mark channel contexts as not being in the driver any more to avoid
1705 * removing them from the driver during the shutdown process...
1706 */
1707 mutex_lock(&local->chanctx_mtx);
1708 list_for_each_entry(ctx, &local->chanctx_list, list)
1709 ctx->driver_present = false;
1710 mutex_unlock(&local->chanctx_mtx);
1711
1712 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1713 }
1714
1715 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1716 struct ieee80211_sub_if_data *sdata)
1717 {
1718 struct ieee80211_chanctx_conf *conf;
1719 struct ieee80211_chanctx *ctx;
1720
1721 if (!local->use_chanctx)
1722 return;
1723
1724 mutex_lock(&local->chanctx_mtx);
1725 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1726 lockdep_is_held(&local->chanctx_mtx));
1727 if (conf) {
1728 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1729 drv_assign_vif_chanctx(local, sdata, ctx);
1730 }
1731 mutex_unlock(&local->chanctx_mtx);
1732 }
1733
1734 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1735 {
1736 struct ieee80211_local *local = sdata->local;
1737 struct sta_info *sta;
1738
1739 /* add STAs back */
1740 mutex_lock(&local->sta_mtx);
1741 list_for_each_entry(sta, &local->sta_list, list) {
1742 enum ieee80211_sta_state state;
1743
1744 if (!sta->uploaded || sta->sdata != sdata)
1745 continue;
1746
1747 for (state = IEEE80211_STA_NOTEXIST;
1748 state < sta->sta_state; state++)
1749 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1750 state + 1));
1751 }
1752 mutex_unlock(&local->sta_mtx);
1753 }
1754
1755 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1756 {
1757 struct cfg80211_nan_func *func, **funcs;
1758 int res, id, i = 0;
1759
1760 res = drv_start_nan(sdata->local, sdata,
1761 &sdata->u.nan.conf);
1762 if (WARN_ON(res))
1763 return res;
1764
1765 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1766 sizeof(*funcs), GFP_KERNEL);
1767 if (!funcs)
1768 return -ENOMEM;
1769
1770 /* Add all the functions:
1771 * This is a little bit ugly. We need to call a potentially sleeping
1772 * callback for each NAN function, so we can't hold the spinlock.
1773 */
1774 spin_lock_bh(&sdata->u.nan.func_lock);
1775
1776 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1777 funcs[i++] = func;
1778
1779 spin_unlock_bh(&sdata->u.nan.func_lock);
1780
1781 for (i = 0; funcs[i]; i++) {
1782 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1783 if (WARN_ON(res))
1784 ieee80211_nan_func_terminated(&sdata->vif,
1785 funcs[i]->instance_id,
1786 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1787 GFP_KERNEL);
1788 }
1789
1790 kfree(funcs);
1791
1792 return 0;
1793 }
1794
1795 int ieee80211_reconfig(struct ieee80211_local *local)
1796 {
1797 struct ieee80211_hw *hw = &local->hw;
1798 struct ieee80211_sub_if_data *sdata;
1799 struct ieee80211_chanctx *ctx;
1800 struct sta_info *sta;
1801 int res, i;
1802 bool reconfig_due_to_wowlan = false;
1803 struct ieee80211_sub_if_data *sched_scan_sdata;
1804 struct cfg80211_sched_scan_request *sched_scan_req;
1805 bool sched_scan_stopped = false;
1806 bool suspended = local->suspended;
1807
1808 /* nothing to do if HW shouldn't run */
1809 if (!local->open_count)
1810 goto wake_up;
1811
1812 #ifdef CONFIG_PM
1813 if (suspended)
1814 local->resuming = true;
1815
1816 if (local->wowlan) {
1817 /*
1818 * In the wowlan case, both mac80211 and the device
1819 * are functional when the resume op is called, so
1820 * clear local->suspended so the device could operate
1821 * normally (e.g. pass rx frames).
1822 */
1823 local->suspended = false;
1824 res = drv_resume(local);
1825 local->wowlan = false;
1826 if (res < 0) {
1827 local->resuming = false;
1828 return res;
1829 }
1830 if (res == 0)
1831 goto wake_up;
1832 WARN_ON(res > 1);
1833 /*
1834 * res is 1, which means the driver requested
1835 * to go through a regular reset on wakeup.
1836 * restore local->suspended in this case.
1837 */
1838 reconfig_due_to_wowlan = true;
1839 local->suspended = true;
1840 }
1841 #endif
1842
1843 /*
1844 * In case of hw_restart during suspend (without wowlan),
1845 * cancel restart work, as we are reconfiguring the device
1846 * anyway.
1847 * Note that restart_work is scheduled on a frozen workqueue,
1848 * so we can't deadlock in this case.
1849 */
1850 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1851 cancel_work_sync(&local->restart_work);
1852
1853 local->started = false;
1854
1855 /*
1856 * Upon resume hardware can sometimes be goofy due to
1857 * various platform / driver / bus issues, so restarting
1858 * the device may at times not work immediately. Propagate
1859 * the error.
1860 */
1861 res = drv_start(local);
1862 if (res) {
1863 if (suspended)
1864 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1865 else
1866 WARN(1, "Hardware became unavailable during restart.\n");
1867 ieee80211_handle_reconfig_failure(local);
1868 return res;
1869 }
1870
1871 /* setup fragmentation threshold */
1872 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1873
1874 /* setup RTS threshold */
1875 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1876
1877 /* reset coverage class */
1878 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1879
1880 ieee80211_led_radio(local, true);
1881 ieee80211_mod_tpt_led_trig(local,
1882 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1883
1884 /* add interfaces */
1885 sdata = rtnl_dereference(local->monitor_sdata);
1886 if (sdata) {
1887 /* in HW restart it exists already */
1888 WARN_ON(local->resuming);
1889 res = drv_add_interface(local, sdata);
1890 if (WARN_ON(res)) {
1891 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1892 synchronize_net();
1893 kfree(sdata);
1894 }
1895 }
1896
1897 list_for_each_entry(sdata, &local->interfaces, list) {
1898 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1899 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1900 ieee80211_sdata_running(sdata)) {
1901 res = drv_add_interface(local, sdata);
1902 if (WARN_ON(res))
1903 break;
1904 }
1905 }
1906
1907 /* If adding any of the interfaces failed above, roll back and
1908 * report failure.
1909 */
1910 if (res) {
1911 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1912 list)
1913 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1914 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1915 ieee80211_sdata_running(sdata))
1916 drv_remove_interface(local, sdata);
1917 ieee80211_handle_reconfig_failure(local);
1918 return res;
1919 }
1920
1921 /* add channel contexts */
1922 if (local->use_chanctx) {
1923 mutex_lock(&local->chanctx_mtx);
1924 list_for_each_entry(ctx, &local->chanctx_list, list)
1925 if (ctx->replace_state !=
1926 IEEE80211_CHANCTX_REPLACES_OTHER)
1927 WARN_ON(drv_add_chanctx(local, ctx));
1928 mutex_unlock(&local->chanctx_mtx);
1929
1930 sdata = rtnl_dereference(local->monitor_sdata);
1931 if (sdata && ieee80211_sdata_running(sdata))
1932 ieee80211_assign_chanctx(local, sdata);
1933 }
1934
1935 /* reconfigure hardware */
1936 ieee80211_hw_config(local, ~0);
1937
1938 ieee80211_configure_filter(local);
1939
1940 /* Finally also reconfigure all the BSS information */
1941 list_for_each_entry(sdata, &local->interfaces, list) {
1942 u32 changed;
1943
1944 if (!ieee80211_sdata_running(sdata))
1945 continue;
1946
1947 ieee80211_assign_chanctx(local, sdata);
1948
1949 switch (sdata->vif.type) {
1950 case NL80211_IFTYPE_AP_VLAN:
1951 case NL80211_IFTYPE_MONITOR:
1952 break;
1953 default:
1954 ieee80211_reconfig_stations(sdata);
1955 /* fall through */
1956 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1957 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1958 drv_conf_tx(local, sdata, i,
1959 &sdata->tx_conf[i]);
1960 break;
1961 }
1962
1963 /* common change flags for all interface types */
1964 changed = BSS_CHANGED_ERP_CTS_PROT |
1965 BSS_CHANGED_ERP_PREAMBLE |
1966 BSS_CHANGED_ERP_SLOT |
1967 BSS_CHANGED_HT |
1968 BSS_CHANGED_BASIC_RATES |
1969 BSS_CHANGED_BEACON_INT |
1970 BSS_CHANGED_BSSID |
1971 BSS_CHANGED_CQM |
1972 BSS_CHANGED_QOS |
1973 BSS_CHANGED_IDLE |
1974 BSS_CHANGED_TXPOWER;
1975
1976 if (sdata->vif.mu_mimo_owner)
1977 changed |= BSS_CHANGED_MU_GROUPS;
1978
1979 switch (sdata->vif.type) {
1980 case NL80211_IFTYPE_STATION:
1981 changed |= BSS_CHANGED_ASSOC |
1982 BSS_CHANGED_ARP_FILTER |
1983 BSS_CHANGED_PS;
1984
1985 /* Re-send beacon info report to the driver */
1986 if (sdata->u.mgd.have_beacon)
1987 changed |= BSS_CHANGED_BEACON_INFO;
1988
1989 if (sdata->vif.bss_conf.max_idle_period ||
1990 sdata->vif.bss_conf.protected_keep_alive)
1991 changed |= BSS_CHANGED_KEEP_ALIVE;
1992
1993 sdata_lock(sdata);
1994 ieee80211_bss_info_change_notify(sdata, changed);
1995 sdata_unlock(sdata);
1996 break;
1997 case NL80211_IFTYPE_OCB:
1998 changed |= BSS_CHANGED_OCB;
1999 ieee80211_bss_info_change_notify(sdata, changed);
2000 break;
2001 case NL80211_IFTYPE_ADHOC:
2002 changed |= BSS_CHANGED_IBSS;
2003 /* fall through */
2004 case NL80211_IFTYPE_AP:
2005 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2006
2007 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2008 changed |= BSS_CHANGED_AP_PROBE_RESP;
2009
2010 if (rcu_access_pointer(sdata->u.ap.beacon))
2011 drv_start_ap(local, sdata);
2012 }
2013
2014 /* fall through */
2015 case NL80211_IFTYPE_MESH_POINT:
2016 if (sdata->vif.bss_conf.enable_beacon) {
2017 changed |= BSS_CHANGED_BEACON |
2018 BSS_CHANGED_BEACON_ENABLED;
2019 ieee80211_bss_info_change_notify(sdata, changed);
2020 }
2021 break;
2022 case NL80211_IFTYPE_NAN:
2023 res = ieee80211_reconfig_nan(sdata);
2024 if (res < 0) {
2025 ieee80211_handle_reconfig_failure(local);
2026 return res;
2027 }
2028 break;
2029 case NL80211_IFTYPE_WDS:
2030 case NL80211_IFTYPE_AP_VLAN:
2031 case NL80211_IFTYPE_MONITOR:
2032 case NL80211_IFTYPE_P2P_DEVICE:
2033 /* nothing to do */
2034 break;
2035 case NL80211_IFTYPE_UNSPECIFIED:
2036 case NUM_NL80211_IFTYPES:
2037 case NL80211_IFTYPE_P2P_CLIENT:
2038 case NL80211_IFTYPE_P2P_GO:
2039 WARN_ON(1);
2040 break;
2041 }
2042 }
2043
2044 ieee80211_recalc_ps(local);
2045
2046 /*
2047 * The sta might be in psm against the ap (e.g. because
2048 * this was the state before a hw restart), so we
2049 * explicitly send a null packet in order to make sure
2050 * it'll sync against the ap (and get out of psm).
2051 */
2052 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2053 list_for_each_entry(sdata, &local->interfaces, list) {
2054 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2055 continue;
2056 if (!sdata->u.mgd.associated)
2057 continue;
2058
2059 ieee80211_send_nullfunc(local, sdata, false);
2060 }
2061 }
2062
2063 /* APs are now beaconing, add back stations */
2064 mutex_lock(&local->sta_mtx);
2065 list_for_each_entry(sta, &local->sta_list, list) {
2066 enum ieee80211_sta_state state;
2067
2068 if (!sta->uploaded)
2069 continue;
2070
2071 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2072 continue;
2073
2074 for (state = IEEE80211_STA_NOTEXIST;
2075 state < sta->sta_state; state++)
2076 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2077 state + 1));
2078 }
2079 mutex_unlock(&local->sta_mtx);
2080
2081 /* add back keys */
2082 list_for_each_entry(sdata, &local->interfaces, list)
2083 ieee80211_reset_crypto_tx_tailroom(sdata);
2084
2085 list_for_each_entry(sdata, &local->interfaces, list)
2086 if (ieee80211_sdata_running(sdata))
2087 ieee80211_enable_keys(sdata);
2088
2089 /* Reconfigure sched scan if it was interrupted by FW restart */
2090 mutex_lock(&local->mtx);
2091 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2092 lockdep_is_held(&local->mtx));
2093 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2094 lockdep_is_held(&local->mtx));
2095 if (sched_scan_sdata && sched_scan_req)
2096 /*
2097 * Sched scan stopped, but we don't want to report it. Instead,
2098 * we're trying to reschedule. However, if more than one scan
2099 * plan was set, we cannot reschedule since we don't know which
2100 * scan plan was currently running (and some scan plans may have
2101 * already finished).
2102 */
2103 if (sched_scan_req->n_scan_plans > 1 ||
2104 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2105 sched_scan_req)) {
2106 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2107 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2108 sched_scan_stopped = true;
2109 }
2110 mutex_unlock(&local->mtx);
2111
2112 if (sched_scan_stopped)
2113 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2114
2115 wake_up:
2116 if (local->in_reconfig) {
2117 local->in_reconfig = false;
2118 barrier();
2119
2120 /* Restart deferred ROCs */
2121 mutex_lock(&local->mtx);
2122 ieee80211_start_next_roc(local);
2123 mutex_unlock(&local->mtx);
2124 }
2125
2126 if (local->monitors == local->open_count && local->monitors > 0)
2127 ieee80211_add_virtual_monitor(local);
2128
2129 /*
2130 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2131 * sessions can be established after a resume.
2132 *
2133 * Also tear down aggregation sessions since reconfiguring
2134 * them in a hardware restart scenario is not easily done
2135 * right now, and the hardware will have lost information
2136 * about the sessions, but we and the AP still think they
2137 * are active. This is really a workaround though.
2138 */
2139 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2140 mutex_lock(&local->sta_mtx);
2141
2142 list_for_each_entry(sta, &local->sta_list, list) {
2143 if (!local->resuming)
2144 ieee80211_sta_tear_down_BA_sessions(
2145 sta, AGG_STOP_LOCAL_REQUEST);
2146 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2147 }
2148
2149 mutex_unlock(&local->sta_mtx);
2150 }
2151
2152 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2153 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2154 false);
2155
2156 /*
2157 * If this is for hw restart things are still running.
2158 * We may want to change that later, however.
2159 */
2160 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2161 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2162
2163 if (!suspended)
2164 return 0;
2165
2166 #ifdef CONFIG_PM
2167 /* first set suspended false, then resuming */
2168 local->suspended = false;
2169 mb();
2170 local->resuming = false;
2171
2172 ieee80211_flush_completed_scan(local, false);
2173
2174 if (local->open_count && !reconfig_due_to_wowlan)
2175 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2176
2177 list_for_each_entry(sdata, &local->interfaces, list) {
2178 if (!ieee80211_sdata_running(sdata))
2179 continue;
2180 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2181 ieee80211_sta_restart(sdata);
2182 }
2183
2184 mod_timer(&local->sta_cleanup, jiffies + 1);
2185 #else
2186 WARN_ON(1);
2187 #endif
2188
2189 return 0;
2190 }
2191
2192 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2193 {
2194 struct ieee80211_sub_if_data *sdata;
2195 struct ieee80211_local *local;
2196 struct ieee80211_key *key;
2197
2198 if (WARN_ON(!vif))
2199 return;
2200
2201 sdata = vif_to_sdata(vif);
2202 local = sdata->local;
2203
2204 if (WARN_ON(!local->resuming))
2205 return;
2206
2207 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2208 return;
2209
2210 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2211
2212 mutex_lock(&local->key_mtx);
2213 list_for_each_entry(key, &sdata->key_list, list)
2214 key->flags |= KEY_FLAG_TAINTED;
2215 mutex_unlock(&local->key_mtx);
2216 }
2217 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2218
2219 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2220 {
2221 struct ieee80211_local *local = sdata->local;
2222 struct ieee80211_chanctx_conf *chanctx_conf;
2223 struct ieee80211_chanctx *chanctx;
2224
2225 mutex_lock(&local->chanctx_mtx);
2226
2227 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2228 lockdep_is_held(&local->chanctx_mtx));
2229
2230 /*
2231 * This function can be called from a work, thus it may be possible
2232 * that the chanctx_conf is removed (due to a disconnection, for
2233 * example).
2234 * So nothing should be done in such case.
2235 */
2236 if (!chanctx_conf)
2237 goto unlock;
2238
2239 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2240 ieee80211_recalc_smps_chanctx(local, chanctx);
2241 unlock:
2242 mutex_unlock(&local->chanctx_mtx);
2243 }
2244
2245 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2246 {
2247 struct ieee80211_local *local = sdata->local;
2248 struct ieee80211_chanctx_conf *chanctx_conf;
2249 struct ieee80211_chanctx *chanctx;
2250
2251 mutex_lock(&local->chanctx_mtx);
2252
2253 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2254 lockdep_is_held(&local->chanctx_mtx));
2255
2256 if (WARN_ON_ONCE(!chanctx_conf))
2257 goto unlock;
2258
2259 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2260 ieee80211_recalc_chanctx_min_def(local, chanctx);
2261 unlock:
2262 mutex_unlock(&local->chanctx_mtx);
2263 }
2264
2265 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2266 {
2267 size_t pos = offset;
2268
2269 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2270 pos += 2 + ies[pos + 1];
2271
2272 return pos;
2273 }
2274
2275 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2276 int rssi_min_thold,
2277 int rssi_max_thold)
2278 {
2279 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2280
2281 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2282 return;
2283
2284 /*
2285 * Scale up threshold values before storing it, as the RSSI averaging
2286 * algorithm uses a scaled up value as well. Change this scaling
2287 * factor if the RSSI averaging algorithm changes.
2288 */
2289 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2290 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2291 }
2292
2293 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2294 int rssi_min_thold,
2295 int rssi_max_thold)
2296 {
2297 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2298
2299 WARN_ON(rssi_min_thold == rssi_max_thold ||
2300 rssi_min_thold > rssi_max_thold);
2301
2302 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2303 rssi_max_thold);
2304 }
2305 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2306
2307 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2308 {
2309 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2310
2311 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2312 }
2313 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2314
2315 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2316 u16 cap)
2317 {
2318 __le16 tmp;
2319
2320 *pos++ = WLAN_EID_HT_CAPABILITY;
2321 *pos++ = sizeof(struct ieee80211_ht_cap);
2322 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2323
2324 /* capability flags */
2325 tmp = cpu_to_le16(cap);
2326 memcpy(pos, &tmp, sizeof(u16));
2327 pos += sizeof(u16);
2328
2329 /* AMPDU parameters */
2330 *pos++ = ht_cap->ampdu_factor |
2331 (ht_cap->ampdu_density <<
2332 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2333
2334 /* MCS set */
2335 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2336 pos += sizeof(ht_cap->mcs);
2337
2338 /* extended capabilities */
2339 pos += sizeof(__le16);
2340
2341 /* BF capabilities */
2342 pos += sizeof(__le32);
2343
2344 /* antenna selection */
2345 pos += sizeof(u8);
2346
2347 return pos;
2348 }
2349
2350 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2351 u32 cap)
2352 {
2353 __le32 tmp;
2354
2355 *pos++ = WLAN_EID_VHT_CAPABILITY;
2356 *pos++ = sizeof(struct ieee80211_vht_cap);
2357 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2358
2359 /* capability flags */
2360 tmp = cpu_to_le32(cap);
2361 memcpy(pos, &tmp, sizeof(u32));
2362 pos += sizeof(u32);
2363
2364 /* VHT MCS set */
2365 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2366 pos += sizeof(vht_cap->vht_mcs);
2367
2368 return pos;
2369 }
2370
2371 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2372 const struct cfg80211_chan_def *chandef,
2373 u16 prot_mode, bool rifs_mode)
2374 {
2375 struct ieee80211_ht_operation *ht_oper;
2376 /* Build HT Information */
2377 *pos++ = WLAN_EID_HT_OPERATION;
2378 *pos++ = sizeof(struct ieee80211_ht_operation);
2379 ht_oper = (struct ieee80211_ht_operation *)pos;
2380 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2381 chandef->chan->center_freq);
2382 switch (chandef->width) {
2383 case NL80211_CHAN_WIDTH_160:
2384 case NL80211_CHAN_WIDTH_80P80:
2385 case NL80211_CHAN_WIDTH_80:
2386 case NL80211_CHAN_WIDTH_40:
2387 if (chandef->center_freq1 > chandef->chan->center_freq)
2388 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2389 else
2390 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2391 break;
2392 default:
2393 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2394 break;
2395 }
2396 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2397 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2398 chandef->width != NL80211_CHAN_WIDTH_20)
2399 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2400
2401 if (rifs_mode)
2402 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2403
2404 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2405 ht_oper->stbc_param = 0x0000;
2406
2407 /* It seems that Basic MCS set and Supported MCS set
2408 are identical for the first 10 bytes */
2409 memset(&ht_oper->basic_set, 0, 16);
2410 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2411
2412 return pos + sizeof(struct ieee80211_ht_operation);
2413 }
2414
2415 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2416 const struct cfg80211_chan_def *chandef)
2417 {
2418 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2419 *pos++ = 3; /* IE length */
2420 /* New channel width */
2421 switch (chandef->width) {
2422 case NL80211_CHAN_WIDTH_80:
2423 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2424 break;
2425 case NL80211_CHAN_WIDTH_160:
2426 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2427 break;
2428 case NL80211_CHAN_WIDTH_80P80:
2429 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2430 break;
2431 default:
2432 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2433 }
2434
2435 /* new center frequency segment 0 */
2436 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2437 /* new center frequency segment 1 */
2438 if (chandef->center_freq2)
2439 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2440 else
2441 *pos++ = 0;
2442 }
2443
2444 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2445 const struct cfg80211_chan_def *chandef)
2446 {
2447 struct ieee80211_vht_operation *vht_oper;
2448
2449 *pos++ = WLAN_EID_VHT_OPERATION;
2450 *pos++ = sizeof(struct ieee80211_vht_operation);
2451 vht_oper = (struct ieee80211_vht_operation *)pos;
2452 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2453 chandef->center_freq1);
2454 if (chandef->center_freq2)
2455 vht_oper->center_freq_seg1_idx =
2456 ieee80211_frequency_to_channel(chandef->center_freq2);
2457 else
2458 vht_oper->center_freq_seg1_idx = 0x00;
2459
2460 switch (chandef->width) {
2461 case NL80211_CHAN_WIDTH_160:
2462 /*
2463 * Convert 160 MHz channel width to new style as interop
2464 * workaround.
2465 */
2466 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2467 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2468 if (chandef->chan->center_freq < chandef->center_freq1)
2469 vht_oper->center_freq_seg0_idx -= 8;
2470 else
2471 vht_oper->center_freq_seg0_idx += 8;
2472 break;
2473 case NL80211_CHAN_WIDTH_80P80:
2474 /*
2475 * Convert 80+80 MHz channel width to new style as interop
2476 * workaround.
2477 */
2478 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2479 break;
2480 case NL80211_CHAN_WIDTH_80:
2481 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2482 break;
2483 default:
2484 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2485 break;
2486 }
2487
2488 /* don't require special VHT peer rates */
2489 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2490
2491 return pos + sizeof(struct ieee80211_vht_operation);
2492 }
2493
2494 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2495 struct cfg80211_chan_def *chandef)
2496 {
2497 enum nl80211_channel_type channel_type;
2498
2499 if (!ht_oper)
2500 return false;
2501
2502 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2503 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2504 channel_type = NL80211_CHAN_HT20;
2505 break;
2506 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2507 channel_type = NL80211_CHAN_HT40PLUS;
2508 break;
2509 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2510 channel_type = NL80211_CHAN_HT40MINUS;
2511 break;
2512 default:
2513 channel_type = NL80211_CHAN_NO_HT;
2514 return false;
2515 }
2516
2517 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2518 return true;
2519 }
2520
2521 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2522 struct cfg80211_chan_def *chandef)
2523 {
2524 struct cfg80211_chan_def new = *chandef;
2525 int cf1, cf2;
2526
2527 if (!oper)
2528 return false;
2529
2530 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2531 chandef->chan->band);
2532 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2533 chandef->chan->band);
2534
2535 switch (oper->chan_width) {
2536 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2537 break;
2538 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2539 new.width = NL80211_CHAN_WIDTH_80;
2540 new.center_freq1 = cf1;
2541 /* If needed, adjust based on the newer interop workaround. */
2542 if (oper->center_freq_seg1_idx) {
2543 unsigned int diff;
2544
2545 diff = abs(oper->center_freq_seg1_idx -
2546 oper->center_freq_seg0_idx);
2547 if (diff == 8) {
2548 new.width = NL80211_CHAN_WIDTH_160;
2549 new.center_freq1 = cf2;
2550 } else if (diff > 8) {
2551 new.width = NL80211_CHAN_WIDTH_80P80;
2552 new.center_freq2 = cf2;
2553 }
2554 }
2555 break;
2556 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2557 new.width = NL80211_CHAN_WIDTH_160;
2558 new.center_freq1 = cf1;
2559 break;
2560 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2561 new.width = NL80211_CHAN_WIDTH_80P80;
2562 new.center_freq1 = cf1;
2563 new.center_freq2 = cf2;
2564 break;
2565 default:
2566 return false;
2567 }
2568
2569 if (!cfg80211_chandef_valid(&new))
2570 return false;
2571
2572 *chandef = new;
2573 return true;
2574 }
2575
2576 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2577 const struct ieee80211_supported_band *sband,
2578 const u8 *srates, int srates_len, u32 *rates)
2579 {
2580 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2581 int shift = ieee80211_chandef_get_shift(chandef);
2582 struct ieee80211_rate *br;
2583 int brate, rate, i, j, count = 0;
2584
2585 *rates = 0;
2586
2587 for (i = 0; i < srates_len; i++) {
2588 rate = srates[i] & 0x7f;
2589
2590 for (j = 0; j < sband->n_bitrates; j++) {
2591 br = &sband->bitrates[j];
2592 if ((rate_flags & br->flags) != rate_flags)
2593 continue;
2594
2595 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2596 if (brate == rate) {
2597 *rates |= BIT(j);
2598 count++;
2599 break;
2600 }
2601 }
2602 }
2603 return count;
2604 }
2605
2606 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2607 struct sk_buff *skb, bool need_basic,
2608 enum nl80211_band band)
2609 {
2610 struct ieee80211_local *local = sdata->local;
2611 struct ieee80211_supported_band *sband;
2612 int rate, shift;
2613 u8 i, rates, *pos;
2614 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2615 u32 rate_flags;
2616
2617 shift = ieee80211_vif_get_shift(&sdata->vif);
2618 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2619 sband = local->hw.wiphy->bands[band];
2620 rates = 0;
2621 for (i = 0; i < sband->n_bitrates; i++) {
2622 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2623 continue;
2624 rates++;
2625 }
2626 if (rates > 8)
2627 rates = 8;
2628
2629 if (skb_tailroom(skb) < rates + 2)
2630 return -ENOMEM;
2631
2632 pos = skb_put(skb, rates + 2);
2633 *pos++ = WLAN_EID_SUPP_RATES;
2634 *pos++ = rates;
2635 for (i = 0; i < rates; i++) {
2636 u8 basic = 0;
2637 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2638 continue;
2639
2640 if (need_basic && basic_rates & BIT(i))
2641 basic = 0x80;
2642 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2643 5 * (1 << shift));
2644 *pos++ = basic | (u8) rate;
2645 }
2646
2647 return 0;
2648 }
2649
2650 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2651 struct sk_buff *skb, bool need_basic,
2652 enum nl80211_band band)
2653 {
2654 struct ieee80211_local *local = sdata->local;
2655 struct ieee80211_supported_band *sband;
2656 int rate, shift;
2657 u8 i, exrates, *pos;
2658 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2659 u32 rate_flags;
2660
2661 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2662 shift = ieee80211_vif_get_shift(&sdata->vif);
2663
2664 sband = local->hw.wiphy->bands[band];
2665 exrates = 0;
2666 for (i = 0; i < sband->n_bitrates; i++) {
2667 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2668 continue;
2669 exrates++;
2670 }
2671
2672 if (exrates > 8)
2673 exrates -= 8;
2674 else
2675 exrates = 0;
2676
2677 if (skb_tailroom(skb) < exrates + 2)
2678 return -ENOMEM;
2679
2680 if (exrates) {
2681 pos = skb_put(skb, exrates + 2);
2682 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2683 *pos++ = exrates;
2684 for (i = 8; i < sband->n_bitrates; i++) {
2685 u8 basic = 0;
2686 if ((rate_flags & sband->bitrates[i].flags)
2687 != rate_flags)
2688 continue;
2689 if (need_basic && basic_rates & BIT(i))
2690 basic = 0x80;
2691 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2692 5 * (1 << shift));
2693 *pos++ = basic | (u8) rate;
2694 }
2695 }
2696 return 0;
2697 }
2698
2699 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2700 {
2701 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2702 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2703
2704 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2705 /* non-managed type inferfaces */
2706 return 0;
2707 }
2708 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2709 }
2710 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2711
2712 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2713 {
2714 if (!mcs)
2715 return 1;
2716
2717 /* TODO: consider rx_highest */
2718
2719 if (mcs->rx_mask[3])
2720 return 4;
2721 if (mcs->rx_mask[2])
2722 return 3;
2723 if (mcs->rx_mask[1])
2724 return 2;
2725 return 1;
2726 }
2727
2728 /**
2729 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2730 * @local: mac80211 hw info struct
2731 * @status: RX status
2732 * @mpdu_len: total MPDU length (including FCS)
2733 * @mpdu_offset: offset into MPDU to calculate timestamp at
2734 *
2735 * This function calculates the RX timestamp at the given MPDU offset, taking
2736 * into account what the RX timestamp was. An offset of 0 will just normalize
2737 * the timestamp to TSF at beginning of MPDU reception.
2738 */
2739 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2740 struct ieee80211_rx_status *status,
2741 unsigned int mpdu_len,
2742 unsigned int mpdu_offset)
2743 {
2744 u64 ts = status->mactime;
2745 struct rate_info ri;
2746 u16 rate;
2747
2748 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2749 return 0;
2750
2751 memset(&ri, 0, sizeof(ri));
2752
2753 /* Fill cfg80211 rate info */
2754 switch (status->encoding) {
2755 case RX_ENC_HT:
2756 ri.mcs = status->rate_idx;
2757 ri.flags |= RATE_INFO_FLAGS_MCS;
2758 ri.bw = status->bw;
2759 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2760 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2761 break;
2762 case RX_ENC_VHT:
2763 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2764 ri.mcs = status->rate_idx;
2765 ri.nss = status->nss;
2766 ri.bw = status->bw;
2767 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2768 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2769 break;
2770 default:
2771 WARN_ON(1);
2772 /* fall through */
2773 case RX_ENC_LEGACY: {
2774 struct ieee80211_supported_band *sband;
2775 int shift = 0;
2776 int bitrate;
2777
2778 ri.bw = status->bw;
2779
2780 switch (status->bw) {
2781 case RATE_INFO_BW_10:
2782 shift = 1;
2783 break;
2784 case RATE_INFO_BW_5:
2785 shift = 2;
2786 break;
2787 }
2788
2789 sband = local->hw.wiphy->bands[status->band];
2790 bitrate = sband->bitrates[status->rate_idx].bitrate;
2791 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2792
2793 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2794 /* TODO: handle HT/VHT preambles */
2795 if (status->band == NL80211_BAND_5GHZ) {
2796 ts += 20 << shift;
2797 mpdu_offset += 2;
2798 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2799 ts += 96;
2800 } else {
2801 ts += 192;
2802 }
2803 }
2804 break;
2805 }
2806 }
2807
2808 rate = cfg80211_calculate_bitrate(&ri);
2809 if (WARN_ONCE(!rate,
2810 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2811 (unsigned long long)status->flag, status->rate_idx,
2812 status->nss))
2813 return 0;
2814
2815 /* rewind from end of MPDU */
2816 if (status->flag & RX_FLAG_MACTIME_END)
2817 ts -= mpdu_len * 8 * 10 / rate;
2818
2819 ts += mpdu_offset * 8 * 10 / rate;
2820
2821 return ts;
2822 }
2823
2824 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2825 {
2826 struct ieee80211_sub_if_data *sdata;
2827 struct cfg80211_chan_def chandef;
2828
2829 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2830 ASSERT_RTNL();
2831
2832 mutex_lock(&local->mtx);
2833 list_for_each_entry(sdata, &local->interfaces, list) {
2834 /* it might be waiting for the local->mtx, but then
2835 * by the time it gets it, sdata->wdev.cac_started
2836 * will no longer be true
2837 */
2838 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2839
2840 if (sdata->wdev.cac_started) {
2841 chandef = sdata->vif.bss_conf.chandef;
2842 ieee80211_vif_release_channel(sdata);
2843 cfg80211_cac_event(sdata->dev,
2844 &chandef,
2845 NL80211_RADAR_CAC_ABORTED,
2846 GFP_KERNEL);
2847 }
2848 }
2849 mutex_unlock(&local->mtx);
2850 }
2851
2852 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2853 {
2854 struct ieee80211_local *local =
2855 container_of(work, struct ieee80211_local, radar_detected_work);
2856 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2857 struct ieee80211_chanctx *ctx;
2858 int num_chanctx = 0;
2859
2860 mutex_lock(&local->chanctx_mtx);
2861 list_for_each_entry(ctx, &local->chanctx_list, list) {
2862 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2863 continue;
2864
2865 num_chanctx++;
2866 chandef = ctx->conf.def;
2867 }
2868 mutex_unlock(&local->chanctx_mtx);
2869
2870 rtnl_lock();
2871 ieee80211_dfs_cac_cancel(local);
2872 rtnl_unlock();
2873
2874 if (num_chanctx > 1)
2875 /* XXX: multi-channel is not supported yet */
2876 WARN_ON(1);
2877 else
2878 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2879 }
2880
2881 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2882 {
2883 struct ieee80211_local *local = hw_to_local(hw);
2884
2885 trace_api_radar_detected(local);
2886
2887 schedule_work(&local->radar_detected_work);
2888 }
2889 EXPORT_SYMBOL(ieee80211_radar_detected);
2890
2891 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2892 {
2893 u32 ret;
2894 int tmp;
2895
2896 switch (c->width) {
2897 case NL80211_CHAN_WIDTH_20:
2898 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2899 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2900 break;
2901 case NL80211_CHAN_WIDTH_40:
2902 c->width = NL80211_CHAN_WIDTH_20;
2903 c->center_freq1 = c->chan->center_freq;
2904 ret = IEEE80211_STA_DISABLE_40MHZ |
2905 IEEE80211_STA_DISABLE_VHT;
2906 break;
2907 case NL80211_CHAN_WIDTH_80:
2908 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2909 /* n_P40 */
2910 tmp /= 2;
2911 /* freq_P40 */
2912 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2913 c->width = NL80211_CHAN_WIDTH_40;
2914 ret = IEEE80211_STA_DISABLE_VHT;
2915 break;
2916 case NL80211_CHAN_WIDTH_80P80:
2917 c->center_freq2 = 0;
2918 c->width = NL80211_CHAN_WIDTH_80;
2919 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2920 IEEE80211_STA_DISABLE_160MHZ;
2921 break;
2922 case NL80211_CHAN_WIDTH_160:
2923 /* n_P20 */
2924 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2925 /* n_P80 */
2926 tmp /= 4;
2927 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2928 c->width = NL80211_CHAN_WIDTH_80;
2929 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2930 IEEE80211_STA_DISABLE_160MHZ;
2931 break;
2932 default:
2933 case NL80211_CHAN_WIDTH_20_NOHT:
2934 WARN_ON_ONCE(1);
2935 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2936 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2937 break;
2938 case NL80211_CHAN_WIDTH_5:
2939 case NL80211_CHAN_WIDTH_10:
2940 WARN_ON_ONCE(1);
2941 /* keep c->width */
2942 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2943 break;
2944 }
2945
2946 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2947
2948 return ret;
2949 }
2950
2951 /*
2952 * Returns true if smps_mode_new is strictly more restrictive than
2953 * smps_mode_old.
2954 */
2955 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2956 enum ieee80211_smps_mode smps_mode_new)
2957 {
2958 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2959 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2960 return false;
2961
2962 switch (smps_mode_old) {
2963 case IEEE80211_SMPS_STATIC:
2964 return false;
2965 case IEEE80211_SMPS_DYNAMIC:
2966 return smps_mode_new == IEEE80211_SMPS_STATIC;
2967 case IEEE80211_SMPS_OFF:
2968 return smps_mode_new != IEEE80211_SMPS_OFF;
2969 default:
2970 WARN_ON(1);
2971 }
2972
2973 return false;
2974 }
2975
2976 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2977 struct cfg80211_csa_settings *csa_settings)
2978 {
2979 struct sk_buff *skb;
2980 struct ieee80211_mgmt *mgmt;
2981 struct ieee80211_local *local = sdata->local;
2982 int freq;
2983 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2984 sizeof(mgmt->u.action.u.chan_switch);
2985 u8 *pos;
2986
2987 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2988 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2989 return -EOPNOTSUPP;
2990
2991 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2992 5 + /* channel switch announcement element */
2993 3 + /* secondary channel offset element */
2994 5 + /* wide bandwidth channel switch announcement */
2995 8); /* mesh channel switch parameters element */
2996 if (!skb)
2997 return -ENOMEM;
2998
2999 skb_reserve(skb, local->tx_headroom);
3000 mgmt = skb_put_zero(skb, hdr_len);
3001 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3002 IEEE80211_STYPE_ACTION);
3003
3004 eth_broadcast_addr(mgmt->da);
3005 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3006 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3007 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3008 } else {
3009 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3010 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3011 }
3012 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3013 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3014 pos = skb_put(skb, 5);
3015 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3016 *pos++ = 3; /* IE length */
3017 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3018 freq = csa_settings->chandef.chan->center_freq;
3019 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3020 *pos++ = csa_settings->count; /* count */
3021
3022 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3023 enum nl80211_channel_type ch_type;
3024
3025 skb_put(skb, 3);
3026 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3027 *pos++ = 1; /* IE length */
3028 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3029 if (ch_type == NL80211_CHAN_HT40PLUS)
3030 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3031 else
3032 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3033 }
3034
3035 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3036 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3037
3038 skb_put(skb, 8);
3039 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3040 *pos++ = 6; /* IE length */
3041 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3042 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3043 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3044 *pos++ |= csa_settings->block_tx ?
3045 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3046 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3047 pos += 2;
3048 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3049 pos += 2;
3050 }
3051
3052 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3053 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3054 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3055 skb_put(skb, 5);
3056 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3057 }
3058
3059 ieee80211_tx_skb(sdata, skb);
3060 return 0;
3061 }
3062
3063 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3064 {
3065 return !(cs == NULL || cs->cipher == 0 ||
3066 cs->hdr_len < cs->pn_len + cs->pn_off ||
3067 cs->hdr_len <= cs->key_idx_off ||
3068 cs->key_idx_shift > 7 ||
3069 cs->key_idx_mask == 0);
3070 }
3071
3072 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3073 {
3074 int i;
3075
3076 /* Ensure we have enough iftype bitmap space for all iftype values */
3077 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3078
3079 for (i = 0; i < n; i++)
3080 if (!ieee80211_cs_valid(&cs[i]))
3081 return false;
3082
3083 return true;
3084 }
3085
3086 const struct ieee80211_cipher_scheme *
3087 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3088 enum nl80211_iftype iftype)
3089 {
3090 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3091 int n = local->hw.n_cipher_schemes;
3092 int i;
3093 const struct ieee80211_cipher_scheme *cs = NULL;
3094
3095 for (i = 0; i < n; i++) {
3096 if (l[i].cipher == cipher) {
3097 cs = &l[i];
3098 break;
3099 }
3100 }
3101
3102 if (!cs || !(cs->iftype & BIT(iftype)))
3103 return NULL;
3104
3105 return cs;
3106 }
3107
3108 int ieee80211_cs_headroom(struct ieee80211_local *local,
3109 struct cfg80211_crypto_settings *crypto,
3110 enum nl80211_iftype iftype)
3111 {
3112 const struct ieee80211_cipher_scheme *cs;
3113 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3114 int i;
3115
3116 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3117 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3118 iftype);
3119
3120 if (cs && headroom < cs->hdr_len)
3121 headroom = cs->hdr_len;
3122 }
3123
3124 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3125 if (cs && headroom < cs->hdr_len)
3126 headroom = cs->hdr_len;
3127
3128 return headroom;
3129 }
3130
3131 static bool
3132 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3133 {
3134 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3135 int skip;
3136
3137 if (end > 0)
3138 return false;
3139
3140 /* One shot NOA */
3141 if (data->count[i] == 1)
3142 return false;
3143
3144 if (data->desc[i].interval == 0)
3145 return false;
3146
3147 /* End time is in the past, check for repetitions */
3148 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3149 if (data->count[i] < 255) {
3150 if (data->count[i] <= skip) {
3151 data->count[i] = 0;
3152 return false;
3153 }
3154
3155 data->count[i] -= skip;
3156 }
3157
3158 data->desc[i].start += skip * data->desc[i].interval;
3159
3160 return true;
3161 }
3162
3163 static bool
3164 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3165 s32 *offset)
3166 {
3167 bool ret = false;
3168 int i;
3169
3170 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3171 s32 cur;
3172
3173 if (!data->count[i])
3174 continue;
3175
3176 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3177 ret = true;
3178
3179 cur = data->desc[i].start - tsf;
3180 if (cur > *offset)
3181 continue;
3182
3183 cur = data->desc[i].start + data->desc[i].duration - tsf;
3184 if (cur > *offset)
3185 *offset = cur;
3186 }
3187
3188 return ret;
3189 }
3190
3191 static u32
3192 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3193 {
3194 s32 offset = 0;
3195 int tries = 0;
3196 /*
3197 * arbitrary limit, used to avoid infinite loops when combined NoA
3198 * descriptors cover the full time period.
3199 */
3200 int max_tries = 5;
3201
3202 ieee80211_extend_absent_time(data, tsf, &offset);
3203 do {
3204 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3205 break;
3206
3207 tries++;
3208 } while (tries < max_tries);
3209
3210 return offset;
3211 }
3212
3213 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3214 {
3215 u32 next_offset = BIT(31) - 1;
3216 int i;
3217
3218 data->absent = 0;
3219 data->has_next_tsf = false;
3220 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3221 s32 start;
3222
3223 if (!data->count[i])
3224 continue;
3225
3226 ieee80211_extend_noa_desc(data, tsf, i);
3227 start = data->desc[i].start - tsf;
3228 if (start <= 0)
3229 data->absent |= BIT(i);
3230
3231 if (next_offset > start)
3232 next_offset = start;
3233
3234 data->has_next_tsf = true;
3235 }
3236
3237 if (data->absent)
3238 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3239
3240 data->next_tsf = tsf + next_offset;
3241 }
3242 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3243
3244 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3245 struct ieee80211_noa_data *data, u32 tsf)
3246 {
3247 int ret = 0;
3248 int i;
3249
3250 memset(data, 0, sizeof(*data));
3251
3252 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3253 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3254
3255 if (!desc->count || !desc->duration)
3256 continue;
3257
3258 data->count[i] = desc->count;
3259 data->desc[i].start = le32_to_cpu(desc->start_time);
3260 data->desc[i].duration = le32_to_cpu(desc->duration);
3261 data->desc[i].interval = le32_to_cpu(desc->interval);
3262
3263 if (data->count[i] > 1 &&
3264 data->desc[i].interval < data->desc[i].duration)
3265 continue;
3266
3267 ieee80211_extend_noa_desc(data, tsf, i);
3268 ret++;
3269 }
3270
3271 if (ret)
3272 ieee80211_update_p2p_noa(data, tsf);
3273
3274 return ret;
3275 }
3276 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3277
3278 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3279 struct ieee80211_sub_if_data *sdata)
3280 {
3281 u64 tsf = drv_get_tsf(local, sdata);
3282 u64 dtim_count = 0;
3283 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3284 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3285 struct ps_data *ps;
3286 u8 bcns_from_dtim;
3287
3288 if (tsf == -1ULL || !beacon_int || !dtim_period)
3289 return;
3290
3291 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3292 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3293 if (!sdata->bss)
3294 return;
3295
3296 ps = &sdata->bss->ps;
3297 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3298 ps = &sdata->u.mesh.ps;
3299 } else {
3300 return;
3301 }
3302
3303 /*
3304 * actually finds last dtim_count, mac80211 will update in
3305 * __beacon_add_tim().
3306 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3307 */
3308 do_div(tsf, beacon_int);
3309 bcns_from_dtim = do_div(tsf, dtim_period);
3310 /* just had a DTIM */
3311 if (!bcns_from_dtim)
3312 dtim_count = 0;
3313 else
3314 dtim_count = dtim_period - bcns_from_dtim;
3315
3316 ps->dtim_count = dtim_count;
3317 }
3318
3319 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3320 struct ieee80211_chanctx *ctx)
3321 {
3322 struct ieee80211_sub_if_data *sdata;
3323 u8 radar_detect = 0;
3324
3325 lockdep_assert_held(&local->chanctx_mtx);
3326
3327 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3328 return 0;
3329
3330 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3331 if (sdata->reserved_radar_required)
3332 radar_detect |= BIT(sdata->reserved_chandef.width);
3333
3334 /*
3335 * An in-place reservation context should not have any assigned vifs
3336 * until it replaces the other context.
3337 */
3338 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3339 !list_empty(&ctx->assigned_vifs));
3340
3341 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3342 if (sdata->radar_required)
3343 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3344
3345 return radar_detect;
3346 }
3347
3348 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3349 const struct cfg80211_chan_def *chandef,
3350 enum ieee80211_chanctx_mode chanmode,
3351 u8 radar_detect)
3352 {
3353 struct ieee80211_local *local = sdata->local;
3354 struct ieee80211_sub_if_data *sdata_iter;
3355 enum nl80211_iftype iftype = sdata->wdev.iftype;
3356 struct ieee80211_chanctx *ctx;
3357 int total = 1;
3358 struct iface_combination_params params = {
3359 .radar_detect = radar_detect,
3360 };
3361
3362 lockdep_assert_held(&local->chanctx_mtx);
3363
3364 if (WARN_ON(hweight32(radar_detect) > 1))
3365 return -EINVAL;
3366
3367 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3368 !chandef->chan))
3369 return -EINVAL;
3370
3371 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3372 return -EINVAL;
3373
3374 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3375 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3376 /*
3377 * always passing this is harmless, since it'll be the
3378 * same value that cfg80211 finds if it finds the same
3379 * interface ... and that's always allowed
3380 */
3381 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3382 }
3383
3384 /* Always allow software iftypes */
3385 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3386 if (radar_detect)
3387 return -EINVAL;
3388 return 0;
3389 }
3390
3391 if (chandef)
3392 params.num_different_channels = 1;
3393
3394 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3395 params.iftype_num[iftype] = 1;
3396
3397 list_for_each_entry(ctx, &local->chanctx_list, list) {
3398 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3399 continue;
3400 params.radar_detect |=
3401 ieee80211_chanctx_radar_detect(local, ctx);
3402 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3403 params.num_different_channels++;
3404 continue;
3405 }
3406 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3407 cfg80211_chandef_compatible(chandef,
3408 &ctx->conf.def))
3409 continue;
3410 params.num_different_channels++;
3411 }
3412
3413 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3414 struct wireless_dev *wdev_iter;
3415
3416 wdev_iter = &sdata_iter->wdev;
3417
3418 if (sdata_iter == sdata ||
3419 !ieee80211_sdata_running(sdata_iter) ||
3420 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3421 continue;
3422
3423 params.iftype_num[wdev_iter->iftype]++;
3424 total++;
3425 }
3426
3427 if (total == 1 && !params.radar_detect)
3428 return 0;
3429
3430 return cfg80211_check_combinations(local->hw.wiphy, &params);
3431 }
3432
3433 static void
3434 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3435 void *data)
3436 {
3437 u32 *max_num_different_channels = data;
3438
3439 *max_num_different_channels = max(*max_num_different_channels,
3440 c->num_different_channels);
3441 }
3442
3443 int ieee80211_max_num_channels(struct ieee80211_local *local)
3444 {
3445 struct ieee80211_sub_if_data *sdata;
3446 struct ieee80211_chanctx *ctx;
3447 u32 max_num_different_channels = 1;
3448 int err;
3449 struct iface_combination_params params = {0};
3450
3451 lockdep_assert_held(&local->chanctx_mtx);
3452
3453 list_for_each_entry(ctx, &local->chanctx_list, list) {
3454 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3455 continue;
3456
3457 params.num_different_channels++;
3458
3459 params.radar_detect |=
3460 ieee80211_chanctx_radar_detect(local, ctx);
3461 }
3462
3463 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3464 params.iftype_num[sdata->wdev.iftype]++;
3465
3466 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3467 ieee80211_iter_max_chans,
3468 &max_num_different_channels);
3469 if (err < 0)
3470 return err;
3471
3472 return max_num_different_channels;
3473 }
3474
3475 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3476 {
3477 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3478 *buf++ = 7; /* len */
3479 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3480 *buf++ = 0x50;
3481 *buf++ = 0xf2;
3482 *buf++ = 2; /* WME */
3483 *buf++ = 0; /* WME info */
3484 *buf++ = 1; /* WME ver */
3485 *buf++ = qosinfo; /* U-APSD no in use */
3486
3487 return buf;
3488 }
3489
3490 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3491 unsigned long *frame_cnt,
3492 unsigned long *byte_cnt)
3493 {
3494 struct txq_info *txqi = to_txq_info(txq);
3495 u32 frag_cnt = 0, frag_bytes = 0;
3496 struct sk_buff *skb;
3497
3498 skb_queue_walk(&txqi->frags, skb) {
3499 frag_cnt++;
3500 frag_bytes += skb->len;
3501 }
3502
3503 if (frame_cnt)
3504 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3505
3506 if (byte_cnt)
3507 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3508 }
3509 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3510
3511 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3512 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3513 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3514 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3515 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3516 };
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