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{nl,mac}80211: allow 4addr AP operation on crypto controlled devices
[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 * Copyright (C) 2018-2019 Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * utilities for mac80211
15 */
16
17 #include <net/mac80211.h>
18 #include <linux/netdevice.h>
19 #include <linux/export.h>
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/bitmap.h>
26 #include <linux/crc32.h>
27 #include <net/net_namespace.h>
28 #include <net/cfg80211.h>
29 #include <net/rtnetlink.h>
30
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
33 #include "rate.h"
34 #include "mesh.h"
35 #include "wme.h"
36 #include "led.h"
37 #include "wep.h"
38
39 /* privid for wiphys to determine whether they belong to us or not */
40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41
42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43 {
44 struct ieee80211_local *local;
45 BUG_ON(!wiphy);
46
47 local = wiphy_priv(wiphy);
48 return &local->hw;
49 }
50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51
52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
53 {
54 struct sk_buff *skb;
55 struct ieee80211_hdr *hdr;
56
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
60 }
61 }
62
63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
65 int shift)
66 {
67 int dur;
68
69 /* calculate duration (in microseconds, rounded up to next higher
70 * integer if it includes a fractional microsecond) to send frame of
71 * len bytes (does not include FCS) at the given rate. Duration will
72 * also include SIFS.
73 *
74 * rate is in 100 kbps, so divident is multiplied by 10 in the
75 * DIV_ROUND_UP() operations.
76 *
77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
78 * is assumed to be 0 otherwise.
79 */
80
81 if (band == NL80211_BAND_5GHZ || erp) {
82 /*
83 * OFDM:
84 *
85 * N_DBPS = DATARATE x 4
86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
87 * (16 = SIGNAL time, 6 = tail bits)
88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
89 *
90 * T_SYM = 4 usec
91 * 802.11a - 18.5.2: aSIFSTime = 16 usec
92 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
93 * signal ext = 6 usec
94 */
95 dur = 16; /* SIFS + signal ext */
96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98
99 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 4 for 5 MHz
101 * * times 2 for 10 MHz
102 */
103 dur *= 1 << shift;
104
105 /* rates should already consider the channel bandwidth,
106 * don't apply divisor again.
107 */
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate); /* T_SYM x N_SYM */
110 } else {
111 /*
112 * 802.11b or 802.11g with 802.11b compatibility:
113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 *
116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117 * aSIFSTime = 10 usec
118 * aPreambleLength = 144 usec or 72 usec with short preamble
119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 */
121 dur = 10; /* aSIFSTime = 10 usec */
122 dur += short_preamble ? (72 + 24) : (144 + 48);
123
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
125 }
126
127 return dur;
128 }
129
130 /* Exported duration function for driver use */
131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
134 size_t frame_len,
135 struct ieee80211_rate *rate)
136 {
137 struct ieee80211_sub_if_data *sdata;
138 u16 dur;
139 int erp, shift = 0;
140 bool short_preamble = false;
141
142 erp = 0;
143 if (vif) {
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
149 }
150
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
153
154 return cpu_to_le16(dur);
155 }
156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157
158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
161 {
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
165 bool short_preamble;
166 int erp, shift = 0, bitrate;
167 u16 dur;
168 struct ieee80211_supported_band *sband;
169
170 sband = local->hw.wiphy->bands[frame_txctl->band];
171
172 short_preamble = false;
173
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
175
176 erp = 0;
177 if (vif) {
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
183 }
184
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
186
187 /* CTS duration */
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190 /* Data frame duration */
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
193 /* ACK duration */
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
196
197 return cpu_to_le16(dur);
198 }
199 EXPORT_SYMBOL(ieee80211_rts_duration);
200
201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
203 size_t frame_len,
204 const struct ieee80211_tx_info *frame_txctl)
205 {
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
209 bool short_preamble;
210 int erp, shift = 0, bitrate;
211 u16 dur;
212 struct ieee80211_supported_band *sband;
213
214 sband = local->hw.wiphy->bands[frame_txctl->band];
215
216 short_preamble = false;
217
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
219 erp = 0;
220 if (vif) {
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
226 }
227
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229
230 /* Data frame duration */
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234 /* ACK duration */
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 }
238
239 return cpu_to_le16(dur);
240 }
241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242
243 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
244 {
245 struct ieee80211_sub_if_data *sdata;
246 int n_acs = IEEE80211_NUM_ACS;
247
248 if (local->ops->wake_tx_queue)
249 return;
250
251 if (local->hw.queues < IEEE80211_NUM_ACS)
252 n_acs = 1;
253
254 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
255 int ac;
256
257 if (!sdata->dev)
258 continue;
259
260 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
261 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
262 continue;
263
264 for (ac = 0; ac < n_acs; ac++) {
265 int ac_queue = sdata->vif.hw_queue[ac];
266
267 if (ac_queue == queue ||
268 (sdata->vif.cab_queue == queue &&
269 local->queue_stop_reasons[ac_queue] == 0 &&
270 skb_queue_empty(&local->pending[ac_queue])))
271 netif_wake_subqueue(sdata->dev, ac);
272 }
273 }
274 }
275
276 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
277 enum queue_stop_reason reason,
278 bool refcounted)
279 {
280 struct ieee80211_local *local = hw_to_local(hw);
281
282 trace_wake_queue(local, queue, reason);
283
284 if (WARN_ON(queue >= hw->queues))
285 return;
286
287 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
288 return;
289
290 if (!refcounted) {
291 local->q_stop_reasons[queue][reason] = 0;
292 } else {
293 local->q_stop_reasons[queue][reason]--;
294 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
295 local->q_stop_reasons[queue][reason] = 0;
296 }
297
298 if (local->q_stop_reasons[queue][reason] == 0)
299 __clear_bit(reason, &local->queue_stop_reasons[queue]);
300
301 if (local->queue_stop_reasons[queue] != 0)
302 /* someone still has this queue stopped */
303 return;
304
305 if (skb_queue_empty(&local->pending[queue])) {
306 rcu_read_lock();
307 ieee80211_propagate_queue_wake(local, queue);
308 rcu_read_unlock();
309 } else
310 tasklet_schedule(&local->tx_pending_tasklet);
311 }
312
313 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
314 enum queue_stop_reason reason,
315 bool refcounted)
316 {
317 struct ieee80211_local *local = hw_to_local(hw);
318 unsigned long flags;
319
320 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
321 __ieee80211_wake_queue(hw, queue, reason, refcounted);
322 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
323 }
324
325 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
326 {
327 ieee80211_wake_queue_by_reason(hw, queue,
328 IEEE80211_QUEUE_STOP_REASON_DRIVER,
329 false);
330 }
331 EXPORT_SYMBOL(ieee80211_wake_queue);
332
333 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason,
335 bool refcounted)
336 {
337 struct ieee80211_local *local = hw_to_local(hw);
338 struct ieee80211_sub_if_data *sdata;
339 int n_acs = IEEE80211_NUM_ACS;
340
341 trace_stop_queue(local, queue, reason);
342
343 if (WARN_ON(queue >= hw->queues))
344 return;
345
346 if (!refcounted)
347 local->q_stop_reasons[queue][reason] = 1;
348 else
349 local->q_stop_reasons[queue][reason]++;
350
351 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
352 return;
353
354 if (local->ops->wake_tx_queue)
355 return;
356
357 if (local->hw.queues < IEEE80211_NUM_ACS)
358 n_acs = 1;
359
360 rcu_read_lock();
361 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
362 int ac;
363
364 if (!sdata->dev)
365 continue;
366
367 for (ac = 0; ac < n_acs; ac++) {
368 if (sdata->vif.hw_queue[ac] == queue ||
369 sdata->vif.cab_queue == queue)
370 netif_stop_subqueue(sdata->dev, ac);
371 }
372 }
373 rcu_read_unlock();
374 }
375
376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
377 enum queue_stop_reason reason,
378 bool refcounted)
379 {
380 struct ieee80211_local *local = hw_to_local(hw);
381 unsigned long flags;
382
383 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
384 __ieee80211_stop_queue(hw, queue, reason, refcounted);
385 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
386 }
387
388 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
389 {
390 ieee80211_stop_queue_by_reason(hw, queue,
391 IEEE80211_QUEUE_STOP_REASON_DRIVER,
392 false);
393 }
394 EXPORT_SYMBOL(ieee80211_stop_queue);
395
396 void ieee80211_add_pending_skb(struct ieee80211_local *local,
397 struct sk_buff *skb)
398 {
399 struct ieee80211_hw *hw = &local->hw;
400 unsigned long flags;
401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
402 int queue = info->hw_queue;
403
404 if (WARN_ON(!info->control.vif)) {
405 ieee80211_free_txskb(&local->hw, skb);
406 return;
407 }
408
409 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
410 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
411 false);
412 __skb_queue_tail(&local->pending[queue], skb);
413 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
414 false);
415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
416 }
417
418 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
419 struct sk_buff_head *skbs)
420 {
421 struct ieee80211_hw *hw = &local->hw;
422 struct sk_buff *skb;
423 unsigned long flags;
424 int queue, i;
425
426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
427 while ((skb = skb_dequeue(skbs))) {
428 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
429
430 if (WARN_ON(!info->control.vif)) {
431 ieee80211_free_txskb(&local->hw, skb);
432 continue;
433 }
434
435 queue = info->hw_queue;
436
437 __ieee80211_stop_queue(hw, queue,
438 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
439 false);
440
441 __skb_queue_tail(&local->pending[queue], skb);
442 }
443
444 for (i = 0; i < hw->queues; i++)
445 __ieee80211_wake_queue(hw, i,
446 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
447 false);
448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449 }
450
451 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
452 unsigned long queues,
453 enum queue_stop_reason reason,
454 bool refcounted)
455 {
456 struct ieee80211_local *local = hw_to_local(hw);
457 unsigned long flags;
458 int i;
459
460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
461
462 for_each_set_bit(i, &queues, hw->queues)
463 __ieee80211_stop_queue(hw, i, reason, refcounted);
464
465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
466 }
467
468 void ieee80211_stop_queues(struct ieee80211_hw *hw)
469 {
470 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
471 IEEE80211_QUEUE_STOP_REASON_DRIVER,
472 false);
473 }
474 EXPORT_SYMBOL(ieee80211_stop_queues);
475
476 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
477 {
478 struct ieee80211_local *local = hw_to_local(hw);
479 unsigned long flags;
480 int ret;
481
482 if (WARN_ON(queue >= hw->queues))
483 return true;
484
485 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
486 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
487 &local->queue_stop_reasons[queue]);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 return ret;
490 }
491 EXPORT_SYMBOL(ieee80211_queue_stopped);
492
493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 unsigned long queues,
495 enum queue_stop_reason reason,
496 bool refcounted)
497 {
498 struct ieee80211_local *local = hw_to_local(hw);
499 unsigned long flags;
500 int i;
501
502 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
503
504 for_each_set_bit(i, &queues, hw->queues)
505 __ieee80211_wake_queue(hw, i, reason, refcounted);
506
507 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
508 }
509
510 void ieee80211_wake_queues(struct ieee80211_hw *hw)
511 {
512 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
513 IEEE80211_QUEUE_STOP_REASON_DRIVER,
514 false);
515 }
516 EXPORT_SYMBOL(ieee80211_wake_queues);
517
518 static unsigned int
519 ieee80211_get_vif_queues(struct ieee80211_local *local,
520 struct ieee80211_sub_if_data *sdata)
521 {
522 unsigned int queues;
523
524 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
525 int ac;
526
527 queues = 0;
528
529 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
530 queues |= BIT(sdata->vif.hw_queue[ac]);
531 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
532 queues |= BIT(sdata->vif.cab_queue);
533 } else {
534 /* all queues */
535 queues = BIT(local->hw.queues) - 1;
536 }
537
538 return queues;
539 }
540
541 void __ieee80211_flush_queues(struct ieee80211_local *local,
542 struct ieee80211_sub_if_data *sdata,
543 unsigned int queues, bool drop)
544 {
545 if (!local->ops->flush)
546 return;
547
548 /*
549 * If no queue was set, or if the HW doesn't support
550 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
551 */
552 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
553 queues = ieee80211_get_vif_queues(local, sdata);
554
555 ieee80211_stop_queues_by_reason(&local->hw, queues,
556 IEEE80211_QUEUE_STOP_REASON_FLUSH,
557 false);
558
559 drv_flush(local, sdata, queues, drop);
560
561 ieee80211_wake_queues_by_reason(&local->hw, queues,
562 IEEE80211_QUEUE_STOP_REASON_FLUSH,
563 false);
564 }
565
566 void ieee80211_flush_queues(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata, bool drop)
568 {
569 __ieee80211_flush_queues(local, sdata, 0, drop);
570 }
571
572 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
573 struct ieee80211_sub_if_data *sdata,
574 enum queue_stop_reason reason)
575 {
576 ieee80211_stop_queues_by_reason(&local->hw,
577 ieee80211_get_vif_queues(local, sdata),
578 reason, true);
579 }
580
581 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
582 struct ieee80211_sub_if_data *sdata,
583 enum queue_stop_reason reason)
584 {
585 ieee80211_wake_queues_by_reason(&local->hw,
586 ieee80211_get_vif_queues(local, sdata),
587 reason, true);
588 }
589
590 static void __iterate_interfaces(struct ieee80211_local *local,
591 u32 iter_flags,
592 void (*iterator)(void *data, u8 *mac,
593 struct ieee80211_vif *vif),
594 void *data)
595 {
596 struct ieee80211_sub_if_data *sdata;
597 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
598
599 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
600 switch (sdata->vif.type) {
601 case NL80211_IFTYPE_MONITOR:
602 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
603 continue;
604 break;
605 case NL80211_IFTYPE_AP_VLAN:
606 continue;
607 default:
608 break;
609 }
610 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
611 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
612 continue;
613 if (ieee80211_sdata_running(sdata) || !active_only)
614 iterator(data, sdata->vif.addr,
615 &sdata->vif);
616 }
617
618 sdata = rcu_dereference_check(local->monitor_sdata,
619 lockdep_is_held(&local->iflist_mtx) ||
620 lockdep_rtnl_is_held());
621 if (sdata &&
622 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
623 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
624 iterator(data, sdata->vif.addr, &sdata->vif);
625 }
626
627 void ieee80211_iterate_interfaces(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
631 void *data)
632 {
633 struct ieee80211_local *local = hw_to_local(hw);
634
635 mutex_lock(&local->iflist_mtx);
636 __iterate_interfaces(local, iter_flags, iterator, data);
637 mutex_unlock(&local->iflist_mtx);
638 }
639 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
640
641 void ieee80211_iterate_active_interfaces_atomic(
642 struct ieee80211_hw *hw, u32 iter_flags,
643 void (*iterator)(void *data, u8 *mac,
644 struct ieee80211_vif *vif),
645 void *data)
646 {
647 struct ieee80211_local *local = hw_to_local(hw);
648
649 rcu_read_lock();
650 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
651 iterator, data);
652 rcu_read_unlock();
653 }
654 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
655
656 void ieee80211_iterate_active_interfaces_rtnl(
657 struct ieee80211_hw *hw, u32 iter_flags,
658 void (*iterator)(void *data, u8 *mac,
659 struct ieee80211_vif *vif),
660 void *data)
661 {
662 struct ieee80211_local *local = hw_to_local(hw);
663
664 ASSERT_RTNL();
665
666 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
667 iterator, data);
668 }
669 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
670
671 static void __iterate_stations(struct ieee80211_local *local,
672 void (*iterator)(void *data,
673 struct ieee80211_sta *sta),
674 void *data)
675 {
676 struct sta_info *sta;
677
678 list_for_each_entry_rcu(sta, &local->sta_list, list) {
679 if (!sta->uploaded)
680 continue;
681
682 iterator(data, &sta->sta);
683 }
684 }
685
686 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
687 void (*iterator)(void *data,
688 struct ieee80211_sta *sta),
689 void *data)
690 {
691 struct ieee80211_local *local = hw_to_local(hw);
692
693 rcu_read_lock();
694 __iterate_stations(local, iterator, data);
695 rcu_read_unlock();
696 }
697 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
698
699 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
700 {
701 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
702
703 if (!ieee80211_sdata_running(sdata) ||
704 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
705 return NULL;
706 return &sdata->vif;
707 }
708 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
709
710 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
711 {
712 struct ieee80211_sub_if_data *sdata;
713
714 if (!vif)
715 return NULL;
716
717 sdata = vif_to_sdata(vif);
718
719 if (!ieee80211_sdata_running(sdata) ||
720 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
721 return NULL;
722
723 return &sdata->wdev;
724 }
725 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
726
727 /*
728 * Nothing should have been stuffed into the workqueue during
729 * the suspend->resume cycle. Since we can't check each caller
730 * of this function if we are already quiescing / suspended,
731 * check here and don't WARN since this can actually happen when
732 * the rx path (for example) is racing against __ieee80211_suspend
733 * and suspending / quiescing was set after the rx path checked
734 * them.
735 */
736 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
737 {
738 if (local->quiescing || (local->suspended && !local->resuming)) {
739 pr_warn("queueing ieee80211 work while going to suspend\n");
740 return false;
741 }
742
743 return true;
744 }
745
746 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
747 {
748 struct ieee80211_local *local = hw_to_local(hw);
749
750 if (!ieee80211_can_queue_work(local))
751 return;
752
753 queue_work(local->workqueue, work);
754 }
755 EXPORT_SYMBOL(ieee80211_queue_work);
756
757 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
758 struct delayed_work *dwork,
759 unsigned long delay)
760 {
761 struct ieee80211_local *local = hw_to_local(hw);
762
763 if (!ieee80211_can_queue_work(local))
764 return;
765
766 queue_delayed_work(local->workqueue, dwork, delay);
767 }
768 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
769
770 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
771 struct ieee802_11_elems *elems,
772 u64 filter, u32 crc)
773 {
774 size_t left = len;
775 const u8 *pos = start;
776 bool calc_crc = filter != 0;
777 DECLARE_BITMAP(seen_elems, 256);
778 const u8 *ie;
779
780 bitmap_zero(seen_elems, 256);
781 memset(elems, 0, sizeof(*elems));
782 elems->ie_start = start;
783 elems->total_len = len;
784
785 while (left >= 2) {
786 u8 id, elen;
787 bool elem_parse_failed;
788
789 id = *pos++;
790 elen = *pos++;
791 left -= 2;
792
793 if (elen > left) {
794 elems->parse_error = true;
795 break;
796 }
797
798 switch (id) {
799 case WLAN_EID_SSID:
800 case WLAN_EID_SUPP_RATES:
801 case WLAN_EID_FH_PARAMS:
802 case WLAN_EID_DS_PARAMS:
803 case WLAN_EID_CF_PARAMS:
804 case WLAN_EID_TIM:
805 case WLAN_EID_IBSS_PARAMS:
806 case WLAN_EID_CHALLENGE:
807 case WLAN_EID_RSN:
808 case WLAN_EID_ERP_INFO:
809 case WLAN_EID_EXT_SUPP_RATES:
810 case WLAN_EID_HT_CAPABILITY:
811 case WLAN_EID_HT_OPERATION:
812 case WLAN_EID_VHT_CAPABILITY:
813 case WLAN_EID_VHT_OPERATION:
814 case WLAN_EID_MESH_ID:
815 case WLAN_EID_MESH_CONFIG:
816 case WLAN_EID_PEER_MGMT:
817 case WLAN_EID_PREQ:
818 case WLAN_EID_PREP:
819 case WLAN_EID_PERR:
820 case WLAN_EID_RANN:
821 case WLAN_EID_CHANNEL_SWITCH:
822 case WLAN_EID_EXT_CHANSWITCH_ANN:
823 case WLAN_EID_COUNTRY:
824 case WLAN_EID_PWR_CONSTRAINT:
825 case WLAN_EID_TIMEOUT_INTERVAL:
826 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
827 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
828 case WLAN_EID_CHAN_SWITCH_PARAM:
829 case WLAN_EID_EXT_CAPABILITY:
830 case WLAN_EID_CHAN_SWITCH_TIMING:
831 case WLAN_EID_LINK_ID:
832 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
833 /*
834 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
835 * that if the content gets bigger it might be needed more than once
836 */
837 if (test_bit(id, seen_elems)) {
838 elems->parse_error = true;
839 left -= elen;
840 pos += elen;
841 continue;
842 }
843 break;
844 }
845
846 if (calc_crc && id < 64 && (filter & (1ULL << id)))
847 crc = crc32_be(crc, pos - 2, elen + 2);
848
849 elem_parse_failed = false;
850
851 switch (id) {
852 case WLAN_EID_LINK_ID:
853 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
854 elem_parse_failed = true;
855 break;
856 }
857 elems->lnk_id = (void *)(pos - 2);
858 break;
859 case WLAN_EID_CHAN_SWITCH_TIMING:
860 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
861 elem_parse_failed = true;
862 break;
863 }
864 elems->ch_sw_timing = (void *)pos;
865 break;
866 case WLAN_EID_EXT_CAPABILITY:
867 elems->ext_capab = pos;
868 elems->ext_capab_len = elen;
869 break;
870 case WLAN_EID_SSID:
871 elems->ssid = pos;
872 elems->ssid_len = elen;
873 break;
874 case WLAN_EID_SUPP_RATES:
875 elems->supp_rates = pos;
876 elems->supp_rates_len = elen;
877 break;
878 case WLAN_EID_DS_PARAMS:
879 if (elen >= 1)
880 elems->ds_params = pos;
881 else
882 elem_parse_failed = true;
883 break;
884 case WLAN_EID_TIM:
885 if (elen >= sizeof(struct ieee80211_tim_ie)) {
886 elems->tim = (void *)pos;
887 elems->tim_len = elen;
888 } else
889 elem_parse_failed = true;
890 break;
891 case WLAN_EID_CHALLENGE:
892 elems->challenge = pos;
893 elems->challenge_len = elen;
894 break;
895 case WLAN_EID_VENDOR_SPECIFIC:
896 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
897 pos[2] == 0xf2) {
898 /* Microsoft OUI (00:50:F2) */
899
900 if (calc_crc)
901 crc = crc32_be(crc, pos - 2, elen + 2);
902
903 if (elen >= 5 && pos[3] == 2) {
904 /* OUI Type 2 - WMM IE */
905 if (pos[4] == 0) {
906 elems->wmm_info = pos;
907 elems->wmm_info_len = elen;
908 } else if (pos[4] == 1) {
909 elems->wmm_param = pos;
910 elems->wmm_param_len = elen;
911 }
912 }
913 }
914 break;
915 case WLAN_EID_RSN:
916 elems->rsn = pos;
917 elems->rsn_len = elen;
918 break;
919 case WLAN_EID_ERP_INFO:
920 if (elen >= 1)
921 elems->erp_info = pos;
922 else
923 elem_parse_failed = true;
924 break;
925 case WLAN_EID_EXT_SUPP_RATES:
926 elems->ext_supp_rates = pos;
927 elems->ext_supp_rates_len = elen;
928 break;
929 case WLAN_EID_HT_CAPABILITY:
930 if (elen >= sizeof(struct ieee80211_ht_cap))
931 elems->ht_cap_elem = (void *)pos;
932 else
933 elem_parse_failed = true;
934 break;
935 case WLAN_EID_HT_OPERATION:
936 if (elen >= sizeof(struct ieee80211_ht_operation))
937 elems->ht_operation = (void *)pos;
938 else
939 elem_parse_failed = true;
940 break;
941 case WLAN_EID_VHT_CAPABILITY:
942 if (elen >= sizeof(struct ieee80211_vht_cap))
943 elems->vht_cap_elem = (void *)pos;
944 else
945 elem_parse_failed = true;
946 break;
947 case WLAN_EID_VHT_OPERATION:
948 if (elen >= sizeof(struct ieee80211_vht_operation))
949 elems->vht_operation = (void *)pos;
950 else
951 elem_parse_failed = true;
952 break;
953 case WLAN_EID_OPMODE_NOTIF:
954 if (elen > 0)
955 elems->opmode_notif = pos;
956 else
957 elem_parse_failed = true;
958 break;
959 case WLAN_EID_MESH_ID:
960 elems->mesh_id = pos;
961 elems->mesh_id_len = elen;
962 break;
963 case WLAN_EID_MESH_CONFIG:
964 if (elen >= sizeof(struct ieee80211_meshconf_ie))
965 elems->mesh_config = (void *)pos;
966 else
967 elem_parse_failed = true;
968 break;
969 case WLAN_EID_PEER_MGMT:
970 elems->peering = pos;
971 elems->peering_len = elen;
972 break;
973 case WLAN_EID_MESH_AWAKE_WINDOW:
974 if (elen >= 2)
975 elems->awake_window = (void *)pos;
976 break;
977 case WLAN_EID_PREQ:
978 elems->preq = pos;
979 elems->preq_len = elen;
980 break;
981 case WLAN_EID_PREP:
982 elems->prep = pos;
983 elems->prep_len = elen;
984 break;
985 case WLAN_EID_PERR:
986 elems->perr = pos;
987 elems->perr_len = elen;
988 break;
989 case WLAN_EID_RANN:
990 if (elen >= sizeof(struct ieee80211_rann_ie))
991 elems->rann = (void *)pos;
992 else
993 elem_parse_failed = true;
994 break;
995 case WLAN_EID_CHANNEL_SWITCH:
996 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
997 elem_parse_failed = true;
998 break;
999 }
1000 elems->ch_switch_ie = (void *)pos;
1001 break;
1002 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004 elem_parse_failed = true;
1005 break;
1006 }
1007 elems->ext_chansw_ie = (void *)pos;
1008 break;
1009 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011 elem_parse_failed = true;
1012 break;
1013 }
1014 elems->sec_chan_offs = (void *)pos;
1015 break;
1016 case WLAN_EID_CHAN_SWITCH_PARAM:
1017 if (elen !=
1018 sizeof(*elems->mesh_chansw_params_ie)) {
1019 elem_parse_failed = true;
1020 break;
1021 }
1022 elems->mesh_chansw_params_ie = (void *)pos;
1023 break;
1024 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1025 if (!action ||
1026 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027 elem_parse_failed = true;
1028 break;
1029 }
1030 elems->wide_bw_chansw_ie = (void *)pos;
1031 break;
1032 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1033 if (action) {
1034 elem_parse_failed = true;
1035 break;
1036 }
1037 /*
1038 * This is a bit tricky, but as we only care about
1039 * the wide bandwidth channel switch element, so
1040 * just parse it out manually.
1041 */
1042 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1043 pos, elen);
1044 if (ie) {
1045 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046 elems->wide_bw_chansw_ie =
1047 (void *)(ie + 2);
1048 else
1049 elem_parse_failed = true;
1050 }
1051 break;
1052 case WLAN_EID_COUNTRY:
1053 elems->country_elem = pos;
1054 elems->country_elem_len = elen;
1055 break;
1056 case WLAN_EID_PWR_CONSTRAINT:
1057 if (elen != 1) {
1058 elem_parse_failed = true;
1059 break;
1060 }
1061 elems->pwr_constr_elem = pos;
1062 break;
1063 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064 /* Lots of different options exist, but we only care
1065 * about the Dynamic Transmit Power Control element.
1066 * First check for the Cisco OUI, then for the DTPC
1067 * tag (0x00).
1068 */
1069 if (elen < 4) {
1070 elem_parse_failed = true;
1071 break;
1072 }
1073
1074 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075 pos[2] != 0x96 || pos[3] != 0x00)
1076 break;
1077
1078 if (elen != 6) {
1079 elem_parse_failed = true;
1080 break;
1081 }
1082
1083 if (calc_crc)
1084 crc = crc32_be(crc, pos - 2, elen + 2);
1085
1086 elems->cisco_dtpc_elem = pos;
1087 break;
1088 case WLAN_EID_TIMEOUT_INTERVAL:
1089 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090 elems->timeout_int = (void *)pos;
1091 else
1092 elem_parse_failed = true;
1093 break;
1094 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1095 if (elen >= sizeof(*elems->max_idle_period_ie))
1096 elems->max_idle_period_ie = (void *)pos;
1097 break;
1098 default:
1099 break;
1100 }
1101
1102 if (elem_parse_failed)
1103 elems->parse_error = true;
1104 else
1105 __set_bit(id, seen_elems);
1106
1107 left -= elen;
1108 pos += elen;
1109 }
1110
1111 if (left != 0)
1112 elems->parse_error = true;
1113
1114 return crc;
1115 }
1116
1117 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1118 bool bss_notify, bool enable_qos)
1119 {
1120 struct ieee80211_local *local = sdata->local;
1121 struct ieee80211_tx_queue_params qparam;
1122 struct ieee80211_chanctx_conf *chanctx_conf;
1123 int ac;
1124 bool use_11b;
1125 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1126 int aCWmin, aCWmax;
1127
1128 if (!local->ops->conf_tx)
1129 return;
1130
1131 if (local->hw.queues < IEEE80211_NUM_ACS)
1132 return;
1133
1134 memset(&qparam, 0, sizeof(qparam));
1135
1136 rcu_read_lock();
1137 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1138 use_11b = (chanctx_conf &&
1139 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1140 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1141 rcu_read_unlock();
1142
1143 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1144
1145 /* Set defaults according to 802.11-2007 Table 7-37 */
1146 aCWmax = 1023;
1147 if (use_11b)
1148 aCWmin = 31;
1149 else
1150 aCWmin = 15;
1151
1152 /* Confiure old 802.11b/g medium access rules. */
1153 qparam.cw_max = aCWmax;
1154 qparam.cw_min = aCWmin;
1155 qparam.txop = 0;
1156 qparam.aifs = 2;
1157
1158 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1159 /* Update if QoS is enabled. */
1160 if (enable_qos) {
1161 switch (ac) {
1162 case IEEE80211_AC_BK:
1163 qparam.cw_max = aCWmax;
1164 qparam.cw_min = aCWmin;
1165 qparam.txop = 0;
1166 if (is_ocb)
1167 qparam.aifs = 9;
1168 else
1169 qparam.aifs = 7;
1170 break;
1171 /* never happens but let's not leave undefined */
1172 default:
1173 case IEEE80211_AC_BE:
1174 qparam.cw_max = aCWmax;
1175 qparam.cw_min = aCWmin;
1176 qparam.txop = 0;
1177 if (is_ocb)
1178 qparam.aifs = 6;
1179 else
1180 qparam.aifs = 3;
1181 break;
1182 case IEEE80211_AC_VI:
1183 qparam.cw_max = aCWmin;
1184 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1185 if (is_ocb)
1186 qparam.txop = 0;
1187 else if (use_11b)
1188 qparam.txop = 6016/32;
1189 else
1190 qparam.txop = 3008/32;
1191
1192 if (is_ocb)
1193 qparam.aifs = 3;
1194 else
1195 qparam.aifs = 2;
1196 break;
1197 case IEEE80211_AC_VO:
1198 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1199 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1200 if (is_ocb)
1201 qparam.txop = 0;
1202 else if (use_11b)
1203 qparam.txop = 3264/32;
1204 else
1205 qparam.txop = 1504/32;
1206 qparam.aifs = 2;
1207 break;
1208 }
1209 }
1210
1211 qparam.uapsd = false;
1212
1213 sdata->tx_conf[ac] = qparam;
1214 drv_conf_tx(local, sdata, ac, &qparam);
1215 }
1216
1217 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1218 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1219 sdata->vif.type != NL80211_IFTYPE_NAN) {
1220 sdata->vif.bss_conf.qos = enable_qos;
1221 if (bss_notify)
1222 ieee80211_bss_info_change_notify(sdata,
1223 BSS_CHANGED_QOS);
1224 }
1225 }
1226
1227 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1228 u16 transaction, u16 auth_alg, u16 status,
1229 const u8 *extra, size_t extra_len, const u8 *da,
1230 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1231 u32 tx_flags)
1232 {
1233 struct ieee80211_local *local = sdata->local;
1234 struct sk_buff *skb;
1235 struct ieee80211_mgmt *mgmt;
1236 int err;
1237
1238 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1239 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1240 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1241 if (!skb)
1242 return;
1243
1244 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1245
1246 mgmt = skb_put_zero(skb, 24 + 6);
1247 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1248 IEEE80211_STYPE_AUTH);
1249 memcpy(mgmt->da, da, ETH_ALEN);
1250 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1251 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1252 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1253 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1254 mgmt->u.auth.status_code = cpu_to_le16(status);
1255 if (extra)
1256 skb_put_data(skb, extra, extra_len);
1257
1258 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1259 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1260 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1261 WARN_ON(err);
1262 }
1263
1264 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1265 tx_flags;
1266 ieee80211_tx_skb(sdata, skb);
1267 }
1268
1269 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1270 const u8 *bssid, u16 stype, u16 reason,
1271 bool send_frame, u8 *frame_buf)
1272 {
1273 struct ieee80211_local *local = sdata->local;
1274 struct sk_buff *skb;
1275 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1276
1277 /* build frame */
1278 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1279 mgmt->duration = 0; /* initialize only */
1280 mgmt->seq_ctrl = 0; /* initialize only */
1281 memcpy(mgmt->da, bssid, ETH_ALEN);
1282 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1283 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1284 /* u.deauth.reason_code == u.disassoc.reason_code */
1285 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1286
1287 if (send_frame) {
1288 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1289 IEEE80211_DEAUTH_FRAME_LEN);
1290 if (!skb)
1291 return;
1292
1293 skb_reserve(skb, local->hw.extra_tx_headroom);
1294
1295 /* copy in frame */
1296 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1297
1298 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1299 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1300 IEEE80211_SKB_CB(skb)->flags |=
1301 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1302
1303 ieee80211_tx_skb(sdata, skb);
1304 }
1305 }
1306
1307 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1308 u8 *buffer, size_t buffer_len,
1309 const u8 *ie, size_t ie_len,
1310 enum nl80211_band band,
1311 u32 rate_mask,
1312 struct cfg80211_chan_def *chandef,
1313 size_t *offset)
1314 {
1315 struct ieee80211_supported_band *sband;
1316 u8 *pos = buffer, *end = buffer + buffer_len;
1317 size_t noffset;
1318 int supp_rates_len, i;
1319 u8 rates[32];
1320 int num_rates;
1321 int ext_rates_len;
1322 int shift;
1323 u32 rate_flags;
1324 bool have_80mhz = false;
1325
1326 *offset = 0;
1327
1328 sband = local->hw.wiphy->bands[band];
1329 if (WARN_ON_ONCE(!sband))
1330 return 0;
1331
1332 rate_flags = ieee80211_chandef_rate_flags(chandef);
1333 shift = ieee80211_chandef_get_shift(chandef);
1334
1335 num_rates = 0;
1336 for (i = 0; i < sband->n_bitrates; i++) {
1337 if ((BIT(i) & rate_mask) == 0)
1338 continue; /* skip rate */
1339 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1340 continue;
1341
1342 rates[num_rates++] =
1343 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1344 (1 << shift) * 5);
1345 }
1346
1347 supp_rates_len = min_t(int, num_rates, 8);
1348
1349 if (end - pos < 2 + supp_rates_len)
1350 goto out_err;
1351 *pos++ = WLAN_EID_SUPP_RATES;
1352 *pos++ = supp_rates_len;
1353 memcpy(pos, rates, supp_rates_len);
1354 pos += supp_rates_len;
1355
1356 /* insert "request information" if in custom IEs */
1357 if (ie && ie_len) {
1358 static const u8 before_extrates[] = {
1359 WLAN_EID_SSID,
1360 WLAN_EID_SUPP_RATES,
1361 WLAN_EID_REQUEST,
1362 };
1363 noffset = ieee80211_ie_split(ie, ie_len,
1364 before_extrates,
1365 ARRAY_SIZE(before_extrates),
1366 *offset);
1367 if (end - pos < noffset - *offset)
1368 goto out_err;
1369 memcpy(pos, ie + *offset, noffset - *offset);
1370 pos += noffset - *offset;
1371 *offset = noffset;
1372 }
1373
1374 ext_rates_len = num_rates - supp_rates_len;
1375 if (ext_rates_len > 0) {
1376 if (end - pos < 2 + ext_rates_len)
1377 goto out_err;
1378 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1379 *pos++ = ext_rates_len;
1380 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1381 pos += ext_rates_len;
1382 }
1383
1384 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1385 if (end - pos < 3)
1386 goto out_err;
1387 *pos++ = WLAN_EID_DS_PARAMS;
1388 *pos++ = 1;
1389 *pos++ = ieee80211_frequency_to_channel(
1390 chandef->chan->center_freq);
1391 }
1392
1393 /* insert custom IEs that go before HT */
1394 if (ie && ie_len) {
1395 static const u8 before_ht[] = {
1396 /*
1397 * no need to list the ones split off already
1398 * (or generated here)
1399 */
1400 WLAN_EID_DS_PARAMS,
1401 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1402 };
1403 noffset = ieee80211_ie_split(ie, ie_len,
1404 before_ht, ARRAY_SIZE(before_ht),
1405 *offset);
1406 if (end - pos < noffset - *offset)
1407 goto out_err;
1408 memcpy(pos, ie + *offset, noffset - *offset);
1409 pos += noffset - *offset;
1410 *offset = noffset;
1411 }
1412
1413 if (sband->ht_cap.ht_supported) {
1414 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1415 goto out_err;
1416 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1417 sband->ht_cap.cap);
1418 }
1419
1420 /*
1421 * If adding more here, adjust code in main.c
1422 * that calculates local->scan_ies_len.
1423 */
1424
1425 /* insert custom IEs that go before VHT */
1426 if (ie && ie_len) {
1427 static const u8 before_vht[] = {
1428 /*
1429 * no need to list the ones split off already
1430 * (or generated here)
1431 */
1432 WLAN_EID_BSS_COEX_2040,
1433 WLAN_EID_EXT_CAPABILITY,
1434 WLAN_EID_SSID_LIST,
1435 WLAN_EID_CHANNEL_USAGE,
1436 WLAN_EID_INTERWORKING,
1437 WLAN_EID_MESH_ID,
1438 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1439 };
1440 noffset = ieee80211_ie_split(ie, ie_len,
1441 before_vht, ARRAY_SIZE(before_vht),
1442 *offset);
1443 if (end - pos < noffset - *offset)
1444 goto out_err;
1445 memcpy(pos, ie + *offset, noffset - *offset);
1446 pos += noffset - *offset;
1447 *offset = noffset;
1448 }
1449
1450 /* Check if any channel in this sband supports at least 80 MHz */
1451 for (i = 0; i < sband->n_channels; i++) {
1452 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1453 IEEE80211_CHAN_NO_80MHZ))
1454 continue;
1455
1456 have_80mhz = true;
1457 break;
1458 }
1459
1460 if (sband->vht_cap.vht_supported && have_80mhz) {
1461 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1462 goto out_err;
1463 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1464 sband->vht_cap.cap);
1465 }
1466
1467 return pos - buffer;
1468 out_err:
1469 WARN_ONCE(1, "not enough space for preq IEs\n");
1470 return pos - buffer;
1471 }
1472
1473 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1474 size_t buffer_len,
1475 struct ieee80211_scan_ies *ie_desc,
1476 const u8 *ie, size_t ie_len,
1477 u8 bands_used, u32 *rate_masks,
1478 struct cfg80211_chan_def *chandef)
1479 {
1480 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1481 int i;
1482
1483 memset(ie_desc, 0, sizeof(*ie_desc));
1484
1485 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1486 if (bands_used & BIT(i)) {
1487 pos += ieee80211_build_preq_ies_band(local,
1488 buffer + pos,
1489 buffer_len - pos,
1490 ie, ie_len, i,
1491 rate_masks[i],
1492 chandef,
1493 &custom_ie_offset);
1494 ie_desc->ies[i] = buffer + old_pos;
1495 ie_desc->len[i] = pos - old_pos;
1496 old_pos = pos;
1497 }
1498 }
1499
1500 /* add any remaining custom IEs */
1501 if (ie && ie_len) {
1502 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1503 "not enough space for preq custom IEs\n"))
1504 return pos;
1505 memcpy(buffer + pos, ie + custom_ie_offset,
1506 ie_len - custom_ie_offset);
1507 ie_desc->common_ies = buffer + pos;
1508 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1509 pos += ie_len - custom_ie_offset;
1510 }
1511
1512 return pos;
1513 };
1514
1515 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1516 const u8 *src, const u8 *dst,
1517 u32 ratemask,
1518 struct ieee80211_channel *chan,
1519 const u8 *ssid, size_t ssid_len,
1520 const u8 *ie, size_t ie_len,
1521 bool directed)
1522 {
1523 struct ieee80211_local *local = sdata->local;
1524 struct cfg80211_chan_def chandef;
1525 struct sk_buff *skb;
1526 struct ieee80211_mgmt *mgmt;
1527 int ies_len;
1528 u32 rate_masks[NUM_NL80211_BANDS] = {};
1529 struct ieee80211_scan_ies dummy_ie_desc;
1530
1531 /*
1532 * Do not send DS Channel parameter for directed probe requests
1533 * in order to maximize the chance that we get a response. Some
1534 * badly-behaved APs don't respond when this parameter is included.
1535 */
1536 chandef.width = sdata->vif.bss_conf.chandef.width;
1537 if (directed)
1538 chandef.chan = NULL;
1539 else
1540 chandef.chan = chan;
1541
1542 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1543 100 + ie_len);
1544 if (!skb)
1545 return NULL;
1546
1547 rate_masks[chan->band] = ratemask;
1548 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1549 skb_tailroom(skb), &dummy_ie_desc,
1550 ie, ie_len, BIT(chan->band),
1551 rate_masks, &chandef);
1552 skb_put(skb, ies_len);
1553
1554 if (dst) {
1555 mgmt = (struct ieee80211_mgmt *) skb->data;
1556 memcpy(mgmt->da, dst, ETH_ALEN);
1557 memcpy(mgmt->bssid, dst, ETH_ALEN);
1558 }
1559
1560 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1561
1562 return skb;
1563 }
1564
1565 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1566 const u8 *src, const u8 *dst,
1567 const u8 *ssid, size_t ssid_len,
1568 const u8 *ie, size_t ie_len,
1569 u32 ratemask, bool directed, u32 tx_flags,
1570 struct ieee80211_channel *channel, bool scan)
1571 {
1572 struct sk_buff *skb;
1573
1574 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1575 ssid, ssid_len,
1576 ie, ie_len, directed);
1577 if (skb) {
1578 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1579 if (scan)
1580 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1581 else
1582 ieee80211_tx_skb(sdata, skb);
1583 }
1584 }
1585
1586 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1587 struct ieee802_11_elems *elems,
1588 enum nl80211_band band, u32 *basic_rates)
1589 {
1590 struct ieee80211_supported_band *sband;
1591 size_t num_rates;
1592 u32 supp_rates, rate_flags;
1593 int i, j, shift;
1594
1595 sband = sdata->local->hw.wiphy->bands[band];
1596 if (WARN_ON(!sband))
1597 return 1;
1598
1599 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1600 shift = ieee80211_vif_get_shift(&sdata->vif);
1601
1602 num_rates = sband->n_bitrates;
1603 supp_rates = 0;
1604 for (i = 0; i < elems->supp_rates_len +
1605 elems->ext_supp_rates_len; i++) {
1606 u8 rate = 0;
1607 int own_rate;
1608 bool is_basic;
1609 if (i < elems->supp_rates_len)
1610 rate = elems->supp_rates[i];
1611 else if (elems->ext_supp_rates)
1612 rate = elems->ext_supp_rates
1613 [i - elems->supp_rates_len];
1614 own_rate = 5 * (rate & 0x7f);
1615 is_basic = !!(rate & 0x80);
1616
1617 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1618 continue;
1619
1620 for (j = 0; j < num_rates; j++) {
1621 int brate;
1622 if ((rate_flags & sband->bitrates[j].flags)
1623 != rate_flags)
1624 continue;
1625
1626 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1627 1 << shift);
1628
1629 if (brate == own_rate) {
1630 supp_rates |= BIT(j);
1631 if (basic_rates && is_basic)
1632 *basic_rates |= BIT(j);
1633 }
1634 }
1635 }
1636 return supp_rates;
1637 }
1638
1639 void ieee80211_stop_device(struct ieee80211_local *local)
1640 {
1641 ieee80211_led_radio(local, false);
1642 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1643
1644 cancel_work_sync(&local->reconfig_filter);
1645
1646 flush_workqueue(local->workqueue);
1647 drv_stop(local);
1648 }
1649
1650 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1651 bool aborted)
1652 {
1653 /* It's possible that we don't handle the scan completion in
1654 * time during suspend, so if it's still marked as completed
1655 * here, queue the work and flush it to clean things up.
1656 * Instead of calling the worker function directly here, we
1657 * really queue it to avoid potential races with other flows
1658 * scheduling the same work.
1659 */
1660 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1661 /* If coming from reconfiguration failure, abort the scan so
1662 * we don't attempt to continue a partial HW scan - which is
1663 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1664 * completed scan, and a 5 GHz portion is still pending.
1665 */
1666 if (aborted)
1667 set_bit(SCAN_ABORTED, &local->scanning);
1668 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1669 flush_delayed_work(&local->scan_work);
1670 }
1671 }
1672
1673 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1674 {
1675 struct ieee80211_sub_if_data *sdata;
1676 struct ieee80211_chanctx *ctx;
1677
1678 /*
1679 * We get here if during resume the device can't be restarted properly.
1680 * We might also get here if this happens during HW reset, which is a
1681 * slightly different situation and we need to drop all connections in
1682 * the latter case.
1683 *
1684 * Ask cfg80211 to turn off all interfaces, this will result in more
1685 * warnings but at least we'll then get into a clean stopped state.
1686 */
1687
1688 local->resuming = false;
1689 local->suspended = false;
1690 local->in_reconfig = false;
1691
1692 ieee80211_flush_completed_scan(local, true);
1693
1694 /* scheduled scan clearly can't be running any more, but tell
1695 * cfg80211 and clear local state
1696 */
1697 ieee80211_sched_scan_end(local);
1698
1699 list_for_each_entry(sdata, &local->interfaces, list)
1700 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1701
1702 /* Mark channel contexts as not being in the driver any more to avoid
1703 * removing them from the driver during the shutdown process...
1704 */
1705 mutex_lock(&local->chanctx_mtx);
1706 list_for_each_entry(ctx, &local->chanctx_list, list)
1707 ctx->driver_present = false;
1708 mutex_unlock(&local->chanctx_mtx);
1709
1710 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1711 }
1712
1713 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1714 struct ieee80211_sub_if_data *sdata)
1715 {
1716 struct ieee80211_chanctx_conf *conf;
1717 struct ieee80211_chanctx *ctx;
1718
1719 if (!local->use_chanctx)
1720 return;
1721
1722 mutex_lock(&local->chanctx_mtx);
1723 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1724 lockdep_is_held(&local->chanctx_mtx));
1725 if (conf) {
1726 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1727 drv_assign_vif_chanctx(local, sdata, ctx);
1728 }
1729 mutex_unlock(&local->chanctx_mtx);
1730 }
1731
1732 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1733 {
1734 struct ieee80211_local *local = sdata->local;
1735 struct sta_info *sta;
1736
1737 /* add STAs back */
1738 mutex_lock(&local->sta_mtx);
1739 list_for_each_entry(sta, &local->sta_list, list) {
1740 enum ieee80211_sta_state state;
1741
1742 if (!sta->uploaded || sta->sdata != sdata)
1743 continue;
1744
1745 for (state = IEEE80211_STA_NOTEXIST;
1746 state < sta->sta_state; state++)
1747 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1748 state + 1));
1749 }
1750 mutex_unlock(&local->sta_mtx);
1751 }
1752
1753 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1754 {
1755 struct cfg80211_nan_func *func, **funcs;
1756 int res, id, i = 0;
1757
1758 res = drv_start_nan(sdata->local, sdata,
1759 &sdata->u.nan.conf);
1760 if (WARN_ON(res))
1761 return res;
1762
1763 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1764 sizeof(*funcs), GFP_KERNEL);
1765 if (!funcs)
1766 return -ENOMEM;
1767
1768 /* Add all the functions:
1769 * This is a little bit ugly. We need to call a potentially sleeping
1770 * callback for each NAN function, so we can't hold the spinlock.
1771 */
1772 spin_lock_bh(&sdata->u.nan.func_lock);
1773
1774 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1775 funcs[i++] = func;
1776
1777 spin_unlock_bh(&sdata->u.nan.func_lock);
1778
1779 for (i = 0; funcs[i]; i++) {
1780 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1781 if (WARN_ON(res))
1782 ieee80211_nan_func_terminated(&sdata->vif,
1783 funcs[i]->instance_id,
1784 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1785 GFP_KERNEL);
1786 }
1787
1788 kfree(funcs);
1789
1790 return 0;
1791 }
1792
1793 int ieee80211_reconfig(struct ieee80211_local *local)
1794 {
1795 struct ieee80211_hw *hw = &local->hw;
1796 struct ieee80211_sub_if_data *sdata;
1797 struct ieee80211_chanctx *ctx;
1798 struct sta_info *sta;
1799 int res, i;
1800 bool reconfig_due_to_wowlan = false;
1801 struct ieee80211_sub_if_data *sched_scan_sdata;
1802 struct cfg80211_sched_scan_request *sched_scan_req;
1803 bool sched_scan_stopped = false;
1804 bool suspended = local->suspended;
1805
1806 /* nothing to do if HW shouldn't run */
1807 if (!local->open_count)
1808 goto wake_up;
1809
1810 #ifdef CONFIG_PM
1811 if (suspended)
1812 local->resuming = true;
1813
1814 if (local->wowlan) {
1815 /*
1816 * In the wowlan case, both mac80211 and the device
1817 * are functional when the resume op is called, so
1818 * clear local->suspended so the device could operate
1819 * normally (e.g. pass rx frames).
1820 */
1821 local->suspended = false;
1822 res = drv_resume(local);
1823 local->wowlan = false;
1824 if (res < 0) {
1825 local->resuming = false;
1826 return res;
1827 }
1828 if (res == 0)
1829 goto wake_up;
1830 WARN_ON(res > 1);
1831 /*
1832 * res is 1, which means the driver requested
1833 * to go through a regular reset on wakeup.
1834 * restore local->suspended in this case.
1835 */
1836 reconfig_due_to_wowlan = true;
1837 local->suspended = true;
1838 }
1839 #endif
1840
1841 /*
1842 * In case of hw_restart during suspend (without wowlan),
1843 * cancel restart work, as we are reconfiguring the device
1844 * anyway.
1845 * Note that restart_work is scheduled on a frozen workqueue,
1846 * so we can't deadlock in this case.
1847 */
1848 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1849 cancel_work_sync(&local->restart_work);
1850
1851 local->started = false;
1852
1853 /*
1854 * Upon resume hardware can sometimes be goofy due to
1855 * various platform / driver / bus issues, so restarting
1856 * the device may at times not work immediately. Propagate
1857 * the error.
1858 */
1859 res = drv_start(local);
1860 if (res) {
1861 if (suspended)
1862 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1863 else
1864 WARN(1, "Hardware became unavailable during restart.\n");
1865 ieee80211_handle_reconfig_failure(local);
1866 return res;
1867 }
1868
1869 /* setup fragmentation threshold */
1870 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1871
1872 /* setup RTS threshold */
1873 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1874
1875 /* reset coverage class */
1876 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1877
1878 ieee80211_led_radio(local, true);
1879 ieee80211_mod_tpt_led_trig(local,
1880 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1881
1882 /* add interfaces */
1883 sdata = rtnl_dereference(local->monitor_sdata);
1884 if (sdata) {
1885 /* in HW restart it exists already */
1886 WARN_ON(local->resuming);
1887 res = drv_add_interface(local, sdata);
1888 if (WARN_ON(res)) {
1889 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1890 synchronize_net();
1891 kfree(sdata);
1892 }
1893 }
1894
1895 list_for_each_entry(sdata, &local->interfaces, list) {
1896 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1897 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1898 ieee80211_sdata_running(sdata)) {
1899 res = drv_add_interface(local, sdata);
1900 if (WARN_ON(res))
1901 break;
1902 }
1903 }
1904
1905 /* If adding any of the interfaces failed above, roll back and
1906 * report failure.
1907 */
1908 if (res) {
1909 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1910 list)
1911 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1912 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1913 ieee80211_sdata_running(sdata))
1914 drv_remove_interface(local, sdata);
1915 ieee80211_handle_reconfig_failure(local);
1916 return res;
1917 }
1918
1919 /* add channel contexts */
1920 if (local->use_chanctx) {
1921 mutex_lock(&local->chanctx_mtx);
1922 list_for_each_entry(ctx, &local->chanctx_list, list)
1923 if (ctx->replace_state !=
1924 IEEE80211_CHANCTX_REPLACES_OTHER)
1925 WARN_ON(drv_add_chanctx(local, ctx));
1926 mutex_unlock(&local->chanctx_mtx);
1927
1928 sdata = rtnl_dereference(local->monitor_sdata);
1929 if (sdata && ieee80211_sdata_running(sdata))
1930 ieee80211_assign_chanctx(local, sdata);
1931 }
1932
1933 /* reconfigure hardware */
1934 ieee80211_hw_config(local, ~0);
1935
1936 ieee80211_configure_filter(local);
1937
1938 /* Finally also reconfigure all the BSS information */
1939 list_for_each_entry(sdata, &local->interfaces, list) {
1940 u32 changed;
1941
1942 if (!ieee80211_sdata_running(sdata))
1943 continue;
1944
1945 ieee80211_assign_chanctx(local, sdata);
1946
1947 switch (sdata->vif.type) {
1948 case NL80211_IFTYPE_AP_VLAN:
1949 case NL80211_IFTYPE_MONITOR:
1950 break;
1951 case NL80211_IFTYPE_ADHOC:
1952 if (sdata->vif.bss_conf.ibss_joined)
1953 WARN_ON(drv_join_ibss(local, sdata));
1954 /* fall through */
1955 default:
1956 ieee80211_reconfig_stations(sdata);
1957 /* fall through */
1958 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1959 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1960 drv_conf_tx(local, sdata, i,
1961 &sdata->tx_conf[i]);
1962 break;
1963 }
1964
1965 /* common change flags for all interface types */
1966 changed = BSS_CHANGED_ERP_CTS_PROT |
1967 BSS_CHANGED_ERP_PREAMBLE |
1968 BSS_CHANGED_ERP_SLOT |
1969 BSS_CHANGED_HT |
1970 BSS_CHANGED_BASIC_RATES |
1971 BSS_CHANGED_BEACON_INT |
1972 BSS_CHANGED_BSSID |
1973 BSS_CHANGED_CQM |
1974 BSS_CHANGED_QOS |
1975 BSS_CHANGED_IDLE |
1976 BSS_CHANGED_TXPOWER;
1977
1978 if (sdata->vif.mu_mimo_owner)
1979 changed |= BSS_CHANGED_MU_GROUPS;
1980
1981 switch (sdata->vif.type) {
1982 case NL80211_IFTYPE_STATION:
1983 changed |= BSS_CHANGED_ASSOC |
1984 BSS_CHANGED_ARP_FILTER |
1985 BSS_CHANGED_PS;
1986
1987 /* Re-send beacon info report to the driver */
1988 if (sdata->u.mgd.have_beacon)
1989 changed |= BSS_CHANGED_BEACON_INFO;
1990
1991 if (sdata->vif.bss_conf.max_idle_period ||
1992 sdata->vif.bss_conf.protected_keep_alive)
1993 changed |= BSS_CHANGED_KEEP_ALIVE;
1994
1995 sdata_lock(sdata);
1996 ieee80211_bss_info_change_notify(sdata, changed);
1997 sdata_unlock(sdata);
1998 break;
1999 case NL80211_IFTYPE_OCB:
2000 changed |= BSS_CHANGED_OCB;
2001 ieee80211_bss_info_change_notify(sdata, changed);
2002 break;
2003 case NL80211_IFTYPE_ADHOC:
2004 changed |= BSS_CHANGED_IBSS;
2005 /* fall through */
2006 case NL80211_IFTYPE_AP:
2007 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2008
2009 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2010 changed |= BSS_CHANGED_AP_PROBE_RESP;
2011
2012 if (rcu_access_pointer(sdata->u.ap.beacon))
2013 drv_start_ap(local, sdata);
2014 }
2015
2016 /* fall through */
2017 case NL80211_IFTYPE_MESH_POINT:
2018 if (sdata->vif.bss_conf.enable_beacon) {
2019 changed |= BSS_CHANGED_BEACON |
2020 BSS_CHANGED_BEACON_ENABLED;
2021 ieee80211_bss_info_change_notify(sdata, changed);
2022 }
2023 break;
2024 case NL80211_IFTYPE_NAN:
2025 res = ieee80211_reconfig_nan(sdata);
2026 if (res < 0) {
2027 ieee80211_handle_reconfig_failure(local);
2028 return res;
2029 }
2030 break;
2031 case NL80211_IFTYPE_WDS:
2032 case NL80211_IFTYPE_AP_VLAN:
2033 case NL80211_IFTYPE_MONITOR:
2034 case NL80211_IFTYPE_P2P_DEVICE:
2035 /* nothing to do */
2036 break;
2037 case NL80211_IFTYPE_UNSPECIFIED:
2038 case NUM_NL80211_IFTYPES:
2039 case NL80211_IFTYPE_P2P_CLIENT:
2040 case NL80211_IFTYPE_P2P_GO:
2041 WARN_ON(1);
2042 break;
2043 }
2044 }
2045
2046 ieee80211_recalc_ps(local);
2047
2048 /*
2049 * The sta might be in psm against the ap (e.g. because
2050 * this was the state before a hw restart), so we
2051 * explicitly send a null packet in order to make sure
2052 * it'll sync against the ap (and get out of psm).
2053 */
2054 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2055 list_for_each_entry(sdata, &local->interfaces, list) {
2056 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2057 continue;
2058 if (!sdata->u.mgd.associated)
2059 continue;
2060
2061 ieee80211_send_nullfunc(local, sdata, false);
2062 }
2063 }
2064
2065 /* APs are now beaconing, add back stations */
2066 mutex_lock(&local->sta_mtx);
2067 list_for_each_entry(sta, &local->sta_list, list) {
2068 enum ieee80211_sta_state state;
2069
2070 if (!sta->uploaded)
2071 continue;
2072
2073 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2074 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2075 continue;
2076
2077 for (state = IEEE80211_STA_NOTEXIST;
2078 state < sta->sta_state; state++)
2079 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2080 state + 1));
2081 }
2082 mutex_unlock(&local->sta_mtx);
2083
2084 /* add back keys */
2085 list_for_each_entry(sdata, &local->interfaces, list)
2086 ieee80211_reset_crypto_tx_tailroom(sdata);
2087
2088 list_for_each_entry(sdata, &local->interfaces, list)
2089 if (ieee80211_sdata_running(sdata))
2090 ieee80211_enable_keys(sdata);
2091
2092 /* Reconfigure sched scan if it was interrupted by FW restart */
2093 mutex_lock(&local->mtx);
2094 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2095 lockdep_is_held(&local->mtx));
2096 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2097 lockdep_is_held(&local->mtx));
2098 if (sched_scan_sdata && sched_scan_req)
2099 /*
2100 * Sched scan stopped, but we don't want to report it. Instead,
2101 * we're trying to reschedule. However, if more than one scan
2102 * plan was set, we cannot reschedule since we don't know which
2103 * scan plan was currently running (and some scan plans may have
2104 * already finished).
2105 */
2106 if (sched_scan_req->n_scan_plans > 1 ||
2107 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2108 sched_scan_req)) {
2109 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2110 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2111 sched_scan_stopped = true;
2112 }
2113 mutex_unlock(&local->mtx);
2114
2115 if (sched_scan_stopped)
2116 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2117
2118 wake_up:
2119 if (local->in_reconfig) {
2120 local->in_reconfig = false;
2121 barrier();
2122
2123 /* Restart deferred ROCs */
2124 mutex_lock(&local->mtx);
2125 ieee80211_start_next_roc(local);
2126 mutex_unlock(&local->mtx);
2127 }
2128
2129 if (local->monitors == local->open_count && local->monitors > 0)
2130 ieee80211_add_virtual_monitor(local);
2131
2132 /*
2133 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2134 * sessions can be established after a resume.
2135 *
2136 * Also tear down aggregation sessions since reconfiguring
2137 * them in a hardware restart scenario is not easily done
2138 * right now, and the hardware will have lost information
2139 * about the sessions, but we and the AP still think they
2140 * are active. This is really a workaround though.
2141 */
2142 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2143 mutex_lock(&local->sta_mtx);
2144
2145 list_for_each_entry(sta, &local->sta_list, list) {
2146 if (!local->resuming)
2147 ieee80211_sta_tear_down_BA_sessions(
2148 sta, AGG_STOP_LOCAL_REQUEST);
2149 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2150 }
2151
2152 mutex_unlock(&local->sta_mtx);
2153 }
2154
2155 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2156 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2157 false);
2158
2159 /*
2160 * If this is for hw restart things are still running.
2161 * We may want to change that later, however.
2162 */
2163 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2164 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2165
2166 if (!suspended)
2167 return 0;
2168
2169 #ifdef CONFIG_PM
2170 /* first set suspended false, then resuming */
2171 local->suspended = false;
2172 mb();
2173 local->resuming = false;
2174
2175 ieee80211_flush_completed_scan(local, false);
2176
2177 if (local->open_count && !reconfig_due_to_wowlan)
2178 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2179
2180 list_for_each_entry(sdata, &local->interfaces, list) {
2181 if (!ieee80211_sdata_running(sdata))
2182 continue;
2183 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2184 ieee80211_sta_restart(sdata);
2185 }
2186
2187 mod_timer(&local->sta_cleanup, jiffies + 1);
2188 #else
2189 WARN_ON(1);
2190 #endif
2191
2192 return 0;
2193 }
2194
2195 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2196 {
2197 struct ieee80211_sub_if_data *sdata;
2198 struct ieee80211_local *local;
2199 struct ieee80211_key *key;
2200
2201 if (WARN_ON(!vif))
2202 return;
2203
2204 sdata = vif_to_sdata(vif);
2205 local = sdata->local;
2206
2207 if (WARN_ON(!local->resuming))
2208 return;
2209
2210 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2211 return;
2212
2213 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2214
2215 mutex_lock(&local->key_mtx);
2216 list_for_each_entry(key, &sdata->key_list, list)
2217 key->flags |= KEY_FLAG_TAINTED;
2218 mutex_unlock(&local->key_mtx);
2219 }
2220 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2221
2222 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2223 {
2224 struct ieee80211_local *local = sdata->local;
2225 struct ieee80211_chanctx_conf *chanctx_conf;
2226 struct ieee80211_chanctx *chanctx;
2227
2228 mutex_lock(&local->chanctx_mtx);
2229
2230 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2231 lockdep_is_held(&local->chanctx_mtx));
2232
2233 /*
2234 * This function can be called from a work, thus it may be possible
2235 * that the chanctx_conf is removed (due to a disconnection, for
2236 * example).
2237 * So nothing should be done in such case.
2238 */
2239 if (!chanctx_conf)
2240 goto unlock;
2241
2242 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2243 ieee80211_recalc_smps_chanctx(local, chanctx);
2244 unlock:
2245 mutex_unlock(&local->chanctx_mtx);
2246 }
2247
2248 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2249 {
2250 struct ieee80211_local *local = sdata->local;
2251 struct ieee80211_chanctx_conf *chanctx_conf;
2252 struct ieee80211_chanctx *chanctx;
2253
2254 mutex_lock(&local->chanctx_mtx);
2255
2256 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2257 lockdep_is_held(&local->chanctx_mtx));
2258
2259 if (WARN_ON_ONCE(!chanctx_conf))
2260 goto unlock;
2261
2262 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2263 ieee80211_recalc_chanctx_min_def(local, chanctx);
2264 unlock:
2265 mutex_unlock(&local->chanctx_mtx);
2266 }
2267
2268 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2269 {
2270 size_t pos = offset;
2271
2272 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2273 pos += 2 + ies[pos + 1];
2274
2275 return pos;
2276 }
2277
2278 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2279 int rssi_min_thold,
2280 int rssi_max_thold)
2281 {
2282 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2283
2284 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2285 return;
2286
2287 /*
2288 * Scale up threshold values before storing it, as the RSSI averaging
2289 * algorithm uses a scaled up value as well. Change this scaling
2290 * factor if the RSSI averaging algorithm changes.
2291 */
2292 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2293 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2294 }
2295
2296 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2297 int rssi_min_thold,
2298 int rssi_max_thold)
2299 {
2300 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2301
2302 WARN_ON(rssi_min_thold == rssi_max_thold ||
2303 rssi_min_thold > rssi_max_thold);
2304
2305 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2306 rssi_max_thold);
2307 }
2308 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2309
2310 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2311 {
2312 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2313
2314 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2315 }
2316 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2317
2318 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2319 u16 cap)
2320 {
2321 __le16 tmp;
2322
2323 *pos++ = WLAN_EID_HT_CAPABILITY;
2324 *pos++ = sizeof(struct ieee80211_ht_cap);
2325 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2326
2327 /* capability flags */
2328 tmp = cpu_to_le16(cap);
2329 memcpy(pos, &tmp, sizeof(u16));
2330 pos += sizeof(u16);
2331
2332 /* AMPDU parameters */
2333 *pos++ = ht_cap->ampdu_factor |
2334 (ht_cap->ampdu_density <<
2335 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2336
2337 /* MCS set */
2338 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2339 pos += sizeof(ht_cap->mcs);
2340
2341 /* extended capabilities */
2342 pos += sizeof(__le16);
2343
2344 /* BF capabilities */
2345 pos += sizeof(__le32);
2346
2347 /* antenna selection */
2348 pos += sizeof(u8);
2349
2350 return pos;
2351 }
2352
2353 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2354 u32 cap)
2355 {
2356 __le32 tmp;
2357
2358 *pos++ = WLAN_EID_VHT_CAPABILITY;
2359 *pos++ = sizeof(struct ieee80211_vht_cap);
2360 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2361
2362 /* capability flags */
2363 tmp = cpu_to_le32(cap);
2364 memcpy(pos, &tmp, sizeof(u32));
2365 pos += sizeof(u32);
2366
2367 /* VHT MCS set */
2368 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2369 pos += sizeof(vht_cap->vht_mcs);
2370
2371 return pos;
2372 }
2373
2374 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2375 const struct cfg80211_chan_def *chandef,
2376 u16 prot_mode, bool rifs_mode)
2377 {
2378 struct ieee80211_ht_operation *ht_oper;
2379 /* Build HT Information */
2380 *pos++ = WLAN_EID_HT_OPERATION;
2381 *pos++ = sizeof(struct ieee80211_ht_operation);
2382 ht_oper = (struct ieee80211_ht_operation *)pos;
2383 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2384 chandef->chan->center_freq);
2385 switch (chandef->width) {
2386 case NL80211_CHAN_WIDTH_160:
2387 case NL80211_CHAN_WIDTH_80P80:
2388 case NL80211_CHAN_WIDTH_80:
2389 case NL80211_CHAN_WIDTH_40:
2390 if (chandef->center_freq1 > chandef->chan->center_freq)
2391 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2392 else
2393 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2394 break;
2395 default:
2396 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2397 break;
2398 }
2399 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2400 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2401 chandef->width != NL80211_CHAN_WIDTH_20)
2402 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2403
2404 if (rifs_mode)
2405 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2406
2407 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2408 ht_oper->stbc_param = 0x0000;
2409
2410 /* It seems that Basic MCS set and Supported MCS set
2411 are identical for the first 10 bytes */
2412 memset(&ht_oper->basic_set, 0, 16);
2413 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2414
2415 return pos + sizeof(struct ieee80211_ht_operation);
2416 }
2417
2418 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2419 const struct cfg80211_chan_def *chandef)
2420 {
2421 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2422 *pos++ = 3; /* IE length */
2423 /* New channel width */
2424 switch (chandef->width) {
2425 case NL80211_CHAN_WIDTH_80:
2426 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2427 break;
2428 case NL80211_CHAN_WIDTH_160:
2429 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2430 break;
2431 case NL80211_CHAN_WIDTH_80P80:
2432 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2433 break;
2434 default:
2435 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2436 }
2437
2438 /* new center frequency segment 0 */
2439 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2440 /* new center frequency segment 1 */
2441 if (chandef->center_freq2)
2442 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2443 else
2444 *pos++ = 0;
2445 }
2446
2447 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2448 const struct cfg80211_chan_def *chandef)
2449 {
2450 struct ieee80211_vht_operation *vht_oper;
2451
2452 *pos++ = WLAN_EID_VHT_OPERATION;
2453 *pos++ = sizeof(struct ieee80211_vht_operation);
2454 vht_oper = (struct ieee80211_vht_operation *)pos;
2455 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2456 chandef->center_freq1);
2457 if (chandef->center_freq2)
2458 vht_oper->center_freq_seg1_idx =
2459 ieee80211_frequency_to_channel(chandef->center_freq2);
2460 else
2461 vht_oper->center_freq_seg1_idx = 0x00;
2462
2463 switch (chandef->width) {
2464 case NL80211_CHAN_WIDTH_160:
2465 /*
2466 * Convert 160 MHz channel width to new style as interop
2467 * workaround.
2468 */
2469 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2470 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2471 if (chandef->chan->center_freq < chandef->center_freq1)
2472 vht_oper->center_freq_seg0_idx -= 8;
2473 else
2474 vht_oper->center_freq_seg0_idx += 8;
2475 break;
2476 case NL80211_CHAN_WIDTH_80P80:
2477 /*
2478 * Convert 80+80 MHz channel width to new style as interop
2479 * workaround.
2480 */
2481 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2482 break;
2483 case NL80211_CHAN_WIDTH_80:
2484 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2485 break;
2486 default:
2487 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2488 break;
2489 }
2490
2491 /* don't require special VHT peer rates */
2492 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2493
2494 return pos + sizeof(struct ieee80211_vht_operation);
2495 }
2496
2497 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2498 struct cfg80211_chan_def *chandef)
2499 {
2500 enum nl80211_channel_type channel_type;
2501
2502 if (!ht_oper)
2503 return false;
2504
2505 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2506 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2507 channel_type = NL80211_CHAN_HT20;
2508 break;
2509 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2510 channel_type = NL80211_CHAN_HT40PLUS;
2511 break;
2512 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2513 channel_type = NL80211_CHAN_HT40MINUS;
2514 break;
2515 default:
2516 channel_type = NL80211_CHAN_NO_HT;
2517 return false;
2518 }
2519
2520 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2521 return true;
2522 }
2523
2524 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2525 struct cfg80211_chan_def *chandef)
2526 {
2527 struct cfg80211_chan_def new = *chandef;
2528 int cf1, cf2;
2529
2530 if (!oper)
2531 return false;
2532
2533 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2534 chandef->chan->band);
2535 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2536 chandef->chan->band);
2537
2538 switch (oper->chan_width) {
2539 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2540 break;
2541 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2542 new.width = NL80211_CHAN_WIDTH_80;
2543 new.center_freq1 = cf1;
2544 /* If needed, adjust based on the newer interop workaround. */
2545 if (oper->center_freq_seg1_idx) {
2546 unsigned int diff;
2547
2548 diff = abs(oper->center_freq_seg1_idx -
2549 oper->center_freq_seg0_idx);
2550 if (diff == 8) {
2551 new.width = NL80211_CHAN_WIDTH_160;
2552 new.center_freq1 = cf2;
2553 } else if (diff > 8) {
2554 new.width = NL80211_CHAN_WIDTH_80P80;
2555 new.center_freq2 = cf2;
2556 }
2557 }
2558 break;
2559 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2560 new.width = NL80211_CHAN_WIDTH_160;
2561 new.center_freq1 = cf1;
2562 break;
2563 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2564 new.width = NL80211_CHAN_WIDTH_80P80;
2565 new.center_freq1 = cf1;
2566 new.center_freq2 = cf2;
2567 break;
2568 default:
2569 return false;
2570 }
2571
2572 if (!cfg80211_chandef_valid(&new))
2573 return false;
2574
2575 *chandef = new;
2576 return true;
2577 }
2578
2579 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2580 const struct ieee80211_supported_band *sband,
2581 const u8 *srates, int srates_len, u32 *rates)
2582 {
2583 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2584 int shift = ieee80211_chandef_get_shift(chandef);
2585 struct ieee80211_rate *br;
2586 int brate, rate, i, j, count = 0;
2587
2588 *rates = 0;
2589
2590 for (i = 0; i < srates_len; i++) {
2591 rate = srates[i] & 0x7f;
2592
2593 for (j = 0; j < sband->n_bitrates; j++) {
2594 br = &sband->bitrates[j];
2595 if ((rate_flags & br->flags) != rate_flags)
2596 continue;
2597
2598 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2599 if (brate == rate) {
2600 *rates |= BIT(j);
2601 count++;
2602 break;
2603 }
2604 }
2605 }
2606 return count;
2607 }
2608
2609 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2610 struct sk_buff *skb, bool need_basic,
2611 enum nl80211_band band)
2612 {
2613 struct ieee80211_local *local = sdata->local;
2614 struct ieee80211_supported_band *sband;
2615 int rate, shift;
2616 u8 i, rates, *pos;
2617 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2618 u32 rate_flags;
2619
2620 shift = ieee80211_vif_get_shift(&sdata->vif);
2621 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2622 sband = local->hw.wiphy->bands[band];
2623 rates = 0;
2624 for (i = 0; i < sband->n_bitrates; i++) {
2625 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2626 continue;
2627 rates++;
2628 }
2629 if (rates > 8)
2630 rates = 8;
2631
2632 if (skb_tailroom(skb) < rates + 2)
2633 return -ENOMEM;
2634
2635 pos = skb_put(skb, rates + 2);
2636 *pos++ = WLAN_EID_SUPP_RATES;
2637 *pos++ = rates;
2638 for (i = 0; i < rates; i++) {
2639 u8 basic = 0;
2640 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2641 continue;
2642
2643 if (need_basic && basic_rates & BIT(i))
2644 basic = 0x80;
2645 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2646 5 * (1 << shift));
2647 *pos++ = basic | (u8) rate;
2648 }
2649
2650 return 0;
2651 }
2652
2653 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2654 struct sk_buff *skb, bool need_basic,
2655 enum nl80211_band band)
2656 {
2657 struct ieee80211_local *local = sdata->local;
2658 struct ieee80211_supported_band *sband;
2659 int rate, shift;
2660 u8 i, exrates, *pos;
2661 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2662 u32 rate_flags;
2663
2664 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2665 shift = ieee80211_vif_get_shift(&sdata->vif);
2666
2667 sband = local->hw.wiphy->bands[band];
2668 exrates = 0;
2669 for (i = 0; i < sband->n_bitrates; i++) {
2670 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2671 continue;
2672 exrates++;
2673 }
2674
2675 if (exrates > 8)
2676 exrates -= 8;
2677 else
2678 exrates = 0;
2679
2680 if (skb_tailroom(skb) < exrates + 2)
2681 return -ENOMEM;
2682
2683 if (exrates) {
2684 pos = skb_put(skb, exrates + 2);
2685 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2686 *pos++ = exrates;
2687 for (i = 8; i < sband->n_bitrates; i++) {
2688 u8 basic = 0;
2689 if ((rate_flags & sband->bitrates[i].flags)
2690 != rate_flags)
2691 continue;
2692 if (need_basic && basic_rates & BIT(i))
2693 basic = 0x80;
2694 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2695 5 * (1 << shift));
2696 *pos++ = basic | (u8) rate;
2697 }
2698 }
2699 return 0;
2700 }
2701
2702 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2703 {
2704 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2705 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2706
2707 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2708 /* non-managed type inferfaces */
2709 return 0;
2710 }
2711 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2712 }
2713 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2714
2715 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2716 {
2717 if (!mcs)
2718 return 1;
2719
2720 /* TODO: consider rx_highest */
2721
2722 if (mcs->rx_mask[3])
2723 return 4;
2724 if (mcs->rx_mask[2])
2725 return 3;
2726 if (mcs->rx_mask[1])
2727 return 2;
2728 return 1;
2729 }
2730
2731 /**
2732 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2733 * @local: mac80211 hw info struct
2734 * @status: RX status
2735 * @mpdu_len: total MPDU length (including FCS)
2736 * @mpdu_offset: offset into MPDU to calculate timestamp at
2737 *
2738 * This function calculates the RX timestamp at the given MPDU offset, taking
2739 * into account what the RX timestamp was. An offset of 0 will just normalize
2740 * the timestamp to TSF at beginning of MPDU reception.
2741 */
2742 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2743 struct ieee80211_rx_status *status,
2744 unsigned int mpdu_len,
2745 unsigned int mpdu_offset)
2746 {
2747 u64 ts = status->mactime;
2748 struct rate_info ri;
2749 u16 rate;
2750
2751 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2752 return 0;
2753
2754 memset(&ri, 0, sizeof(ri));
2755
2756 /* Fill cfg80211 rate info */
2757 switch (status->encoding) {
2758 case RX_ENC_HT:
2759 ri.mcs = status->rate_idx;
2760 ri.flags |= RATE_INFO_FLAGS_MCS;
2761 ri.bw = status->bw;
2762 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2763 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2764 break;
2765 case RX_ENC_VHT:
2766 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2767 ri.mcs = status->rate_idx;
2768 ri.nss = status->nss;
2769 ri.bw = status->bw;
2770 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2771 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2772 break;
2773 default:
2774 WARN_ON(1);
2775 /* fall through */
2776 case RX_ENC_LEGACY: {
2777 struct ieee80211_supported_band *sband;
2778 int shift = 0;
2779 int bitrate;
2780
2781 ri.bw = status->bw;
2782
2783 switch (status->bw) {
2784 case RATE_INFO_BW_10:
2785 shift = 1;
2786 break;
2787 case RATE_INFO_BW_5:
2788 shift = 2;
2789 break;
2790 }
2791
2792 sband = local->hw.wiphy->bands[status->band];
2793 bitrate = sband->bitrates[status->rate_idx].bitrate;
2794 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2795
2796 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2797 /* TODO: handle HT/VHT preambles */
2798 if (status->band == NL80211_BAND_5GHZ) {
2799 ts += 20 << shift;
2800 mpdu_offset += 2;
2801 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2802 ts += 96;
2803 } else {
2804 ts += 192;
2805 }
2806 }
2807 break;
2808 }
2809 }
2810
2811 rate = cfg80211_calculate_bitrate(&ri);
2812 if (WARN_ONCE(!rate,
2813 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2814 (unsigned long long)status->flag, status->rate_idx,
2815 status->nss))
2816 return 0;
2817
2818 /* rewind from end of MPDU */
2819 if (status->flag & RX_FLAG_MACTIME_END)
2820 ts -= mpdu_len * 8 * 10 / rate;
2821
2822 ts += mpdu_offset * 8 * 10 / rate;
2823
2824 return ts;
2825 }
2826
2827 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2828 {
2829 struct ieee80211_sub_if_data *sdata;
2830 struct cfg80211_chan_def chandef;
2831
2832 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2833 ASSERT_RTNL();
2834
2835 mutex_lock(&local->mtx);
2836 list_for_each_entry(sdata, &local->interfaces, list) {
2837 /* it might be waiting for the local->mtx, but then
2838 * by the time it gets it, sdata->wdev.cac_started
2839 * will no longer be true
2840 */
2841 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2842
2843 if (sdata->wdev.cac_started) {
2844 chandef = sdata->vif.bss_conf.chandef;
2845 ieee80211_vif_release_channel(sdata);
2846 cfg80211_cac_event(sdata->dev,
2847 &chandef,
2848 NL80211_RADAR_CAC_ABORTED,
2849 GFP_KERNEL);
2850 }
2851 }
2852 mutex_unlock(&local->mtx);
2853 }
2854
2855 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2856 {
2857 struct ieee80211_local *local =
2858 container_of(work, struct ieee80211_local, radar_detected_work);
2859 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2860 struct ieee80211_chanctx *ctx;
2861 int num_chanctx = 0;
2862
2863 mutex_lock(&local->chanctx_mtx);
2864 list_for_each_entry(ctx, &local->chanctx_list, list) {
2865 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2866 continue;
2867
2868 num_chanctx++;
2869 chandef = ctx->conf.def;
2870 }
2871 mutex_unlock(&local->chanctx_mtx);
2872
2873 rtnl_lock();
2874 ieee80211_dfs_cac_cancel(local);
2875 rtnl_unlock();
2876
2877 if (num_chanctx > 1)
2878 /* XXX: multi-channel is not supported yet */
2879 WARN_ON(1);
2880 else
2881 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2882 }
2883
2884 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2885 {
2886 struct ieee80211_local *local = hw_to_local(hw);
2887
2888 trace_api_radar_detected(local);
2889
2890 schedule_work(&local->radar_detected_work);
2891 }
2892 EXPORT_SYMBOL(ieee80211_radar_detected);
2893
2894 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2895 {
2896 u32 ret;
2897 int tmp;
2898
2899 switch (c->width) {
2900 case NL80211_CHAN_WIDTH_20:
2901 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2902 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2903 break;
2904 case NL80211_CHAN_WIDTH_40:
2905 c->width = NL80211_CHAN_WIDTH_20;
2906 c->center_freq1 = c->chan->center_freq;
2907 ret = IEEE80211_STA_DISABLE_40MHZ |
2908 IEEE80211_STA_DISABLE_VHT;
2909 break;
2910 case NL80211_CHAN_WIDTH_80:
2911 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2912 /* n_P40 */
2913 tmp /= 2;
2914 /* freq_P40 */
2915 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2916 c->width = NL80211_CHAN_WIDTH_40;
2917 ret = IEEE80211_STA_DISABLE_VHT;
2918 break;
2919 case NL80211_CHAN_WIDTH_80P80:
2920 c->center_freq2 = 0;
2921 c->width = NL80211_CHAN_WIDTH_80;
2922 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2923 IEEE80211_STA_DISABLE_160MHZ;
2924 break;
2925 case NL80211_CHAN_WIDTH_160:
2926 /* n_P20 */
2927 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2928 /* n_P80 */
2929 tmp /= 4;
2930 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2931 c->width = NL80211_CHAN_WIDTH_80;
2932 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2933 IEEE80211_STA_DISABLE_160MHZ;
2934 break;
2935 default:
2936 case NL80211_CHAN_WIDTH_20_NOHT:
2937 WARN_ON_ONCE(1);
2938 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2939 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2940 break;
2941 case NL80211_CHAN_WIDTH_5:
2942 case NL80211_CHAN_WIDTH_10:
2943 WARN_ON_ONCE(1);
2944 /* keep c->width */
2945 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2946 break;
2947 }
2948
2949 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2950
2951 return ret;
2952 }
2953
2954 /*
2955 * Returns true if smps_mode_new is strictly more restrictive than
2956 * smps_mode_old.
2957 */
2958 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2959 enum ieee80211_smps_mode smps_mode_new)
2960 {
2961 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2962 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2963 return false;
2964
2965 switch (smps_mode_old) {
2966 case IEEE80211_SMPS_STATIC:
2967 return false;
2968 case IEEE80211_SMPS_DYNAMIC:
2969 return smps_mode_new == IEEE80211_SMPS_STATIC;
2970 case IEEE80211_SMPS_OFF:
2971 return smps_mode_new != IEEE80211_SMPS_OFF;
2972 default:
2973 WARN_ON(1);
2974 }
2975
2976 return false;
2977 }
2978
2979 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2980 struct cfg80211_csa_settings *csa_settings)
2981 {
2982 struct sk_buff *skb;
2983 struct ieee80211_mgmt *mgmt;
2984 struct ieee80211_local *local = sdata->local;
2985 int freq;
2986 int hdr_len = offsetofend(struct ieee80211_mgmt,
2987 u.action.u.chan_switch);
2988 u8 *pos;
2989
2990 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2991 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2992 return -EOPNOTSUPP;
2993
2994 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2995 5 + /* channel switch announcement element */
2996 3 + /* secondary channel offset element */
2997 5 + /* wide bandwidth channel switch announcement */
2998 8); /* mesh channel switch parameters element */
2999 if (!skb)
3000 return -ENOMEM;
3001
3002 skb_reserve(skb, local->tx_headroom);
3003 mgmt = skb_put_zero(skb, hdr_len);
3004 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3005 IEEE80211_STYPE_ACTION);
3006
3007 eth_broadcast_addr(mgmt->da);
3008 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3009 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3010 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3011 } else {
3012 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3013 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3014 }
3015 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3016 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3017 pos = skb_put(skb, 5);
3018 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3019 *pos++ = 3; /* IE length */
3020 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3021 freq = csa_settings->chandef.chan->center_freq;
3022 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3023 *pos++ = csa_settings->count; /* count */
3024
3025 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3026 enum nl80211_channel_type ch_type;
3027
3028 skb_put(skb, 3);
3029 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3030 *pos++ = 1; /* IE length */
3031 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3032 if (ch_type == NL80211_CHAN_HT40PLUS)
3033 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3034 else
3035 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3036 }
3037
3038 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3039 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3040
3041 skb_put(skb, 8);
3042 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3043 *pos++ = 6; /* IE length */
3044 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3045 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3046 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3047 *pos++ |= csa_settings->block_tx ?
3048 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3049 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3050 pos += 2;
3051 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3052 pos += 2;
3053 }
3054
3055 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3056 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3057 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3058 skb_put(skb, 5);
3059 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3060 }
3061
3062 ieee80211_tx_skb(sdata, skb);
3063 return 0;
3064 }
3065
3066 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3067 {
3068 return !(cs == NULL || cs->cipher == 0 ||
3069 cs->hdr_len < cs->pn_len + cs->pn_off ||
3070 cs->hdr_len <= cs->key_idx_off ||
3071 cs->key_idx_shift > 7 ||
3072 cs->key_idx_mask == 0);
3073 }
3074
3075 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3076 {
3077 int i;
3078
3079 /* Ensure we have enough iftype bitmap space for all iftype values */
3080 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3081
3082 for (i = 0; i < n; i++)
3083 if (!ieee80211_cs_valid(&cs[i]))
3084 return false;
3085
3086 return true;
3087 }
3088
3089 const struct ieee80211_cipher_scheme *
3090 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3091 enum nl80211_iftype iftype)
3092 {
3093 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3094 int n = local->hw.n_cipher_schemes;
3095 int i;
3096 const struct ieee80211_cipher_scheme *cs = NULL;
3097
3098 for (i = 0; i < n; i++) {
3099 if (l[i].cipher == cipher) {
3100 cs = &l[i];
3101 break;
3102 }
3103 }
3104
3105 if (!cs || !(cs->iftype & BIT(iftype)))
3106 return NULL;
3107
3108 return cs;
3109 }
3110
3111 int ieee80211_cs_headroom(struct ieee80211_local *local,
3112 struct cfg80211_crypto_settings *crypto,
3113 enum nl80211_iftype iftype)
3114 {
3115 const struct ieee80211_cipher_scheme *cs;
3116 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3117 int i;
3118
3119 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3120 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3121 iftype);
3122
3123 if (cs && headroom < cs->hdr_len)
3124 headroom = cs->hdr_len;
3125 }
3126
3127 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3128 if (cs && headroom < cs->hdr_len)
3129 headroom = cs->hdr_len;
3130
3131 return headroom;
3132 }
3133
3134 static bool
3135 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3136 {
3137 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3138 int skip;
3139
3140 if (end > 0)
3141 return false;
3142
3143 /* One shot NOA */
3144 if (data->count[i] == 1)
3145 return false;
3146
3147 if (data->desc[i].interval == 0)
3148 return false;
3149
3150 /* End time is in the past, check for repetitions */
3151 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3152 if (data->count[i] < 255) {
3153 if (data->count[i] <= skip) {
3154 data->count[i] = 0;
3155 return false;
3156 }
3157
3158 data->count[i] -= skip;
3159 }
3160
3161 data->desc[i].start += skip * data->desc[i].interval;
3162
3163 return true;
3164 }
3165
3166 static bool
3167 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3168 s32 *offset)
3169 {
3170 bool ret = false;
3171 int i;
3172
3173 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3174 s32 cur;
3175
3176 if (!data->count[i])
3177 continue;
3178
3179 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3180 ret = true;
3181
3182 cur = data->desc[i].start - tsf;
3183 if (cur > *offset)
3184 continue;
3185
3186 cur = data->desc[i].start + data->desc[i].duration - tsf;
3187 if (cur > *offset)
3188 *offset = cur;
3189 }
3190
3191 return ret;
3192 }
3193
3194 static u32
3195 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3196 {
3197 s32 offset = 0;
3198 int tries = 0;
3199 /*
3200 * arbitrary limit, used to avoid infinite loops when combined NoA
3201 * descriptors cover the full time period.
3202 */
3203 int max_tries = 5;
3204
3205 ieee80211_extend_absent_time(data, tsf, &offset);
3206 do {
3207 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3208 break;
3209
3210 tries++;
3211 } while (tries < max_tries);
3212
3213 return offset;
3214 }
3215
3216 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3217 {
3218 u32 next_offset = BIT(31) - 1;
3219 int i;
3220
3221 data->absent = 0;
3222 data->has_next_tsf = false;
3223 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3224 s32 start;
3225
3226 if (!data->count[i])
3227 continue;
3228
3229 ieee80211_extend_noa_desc(data, tsf, i);
3230 start = data->desc[i].start - tsf;
3231 if (start <= 0)
3232 data->absent |= BIT(i);
3233
3234 if (next_offset > start)
3235 next_offset = start;
3236
3237 data->has_next_tsf = true;
3238 }
3239
3240 if (data->absent)
3241 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3242
3243 data->next_tsf = tsf + next_offset;
3244 }
3245 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3246
3247 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3248 struct ieee80211_noa_data *data, u32 tsf)
3249 {
3250 int ret = 0;
3251 int i;
3252
3253 memset(data, 0, sizeof(*data));
3254
3255 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3256 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3257
3258 if (!desc->count || !desc->duration)
3259 continue;
3260
3261 data->count[i] = desc->count;
3262 data->desc[i].start = le32_to_cpu(desc->start_time);
3263 data->desc[i].duration = le32_to_cpu(desc->duration);
3264 data->desc[i].interval = le32_to_cpu(desc->interval);
3265
3266 if (data->count[i] > 1 &&
3267 data->desc[i].interval < data->desc[i].duration)
3268 continue;
3269
3270 ieee80211_extend_noa_desc(data, tsf, i);
3271 ret++;
3272 }
3273
3274 if (ret)
3275 ieee80211_update_p2p_noa(data, tsf);
3276
3277 return ret;
3278 }
3279 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3280
3281 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3282 struct ieee80211_sub_if_data *sdata)
3283 {
3284 u64 tsf = drv_get_tsf(local, sdata);
3285 u64 dtim_count = 0;
3286 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3287 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3288 struct ps_data *ps;
3289 u8 bcns_from_dtim;
3290
3291 if (tsf == -1ULL || !beacon_int || !dtim_period)
3292 return;
3293
3294 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3295 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3296 if (!sdata->bss)
3297 return;
3298
3299 ps = &sdata->bss->ps;
3300 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3301 ps = &sdata->u.mesh.ps;
3302 } else {
3303 return;
3304 }
3305
3306 /*
3307 * actually finds last dtim_count, mac80211 will update in
3308 * __beacon_add_tim().
3309 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3310 */
3311 do_div(tsf, beacon_int);
3312 bcns_from_dtim = do_div(tsf, dtim_period);
3313 /* just had a DTIM */
3314 if (!bcns_from_dtim)
3315 dtim_count = 0;
3316 else
3317 dtim_count = dtim_period - bcns_from_dtim;
3318
3319 ps->dtim_count = dtim_count;
3320 }
3321
3322 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3323 struct ieee80211_chanctx *ctx)
3324 {
3325 struct ieee80211_sub_if_data *sdata;
3326 u8 radar_detect = 0;
3327
3328 lockdep_assert_held(&local->chanctx_mtx);
3329
3330 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3331 return 0;
3332
3333 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3334 if (sdata->reserved_radar_required)
3335 radar_detect |= BIT(sdata->reserved_chandef.width);
3336
3337 /*
3338 * An in-place reservation context should not have any assigned vifs
3339 * until it replaces the other context.
3340 */
3341 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3342 !list_empty(&ctx->assigned_vifs));
3343
3344 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3345 if (sdata->radar_required)
3346 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3347
3348 return radar_detect;
3349 }
3350
3351 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3352 const struct cfg80211_chan_def *chandef,
3353 enum ieee80211_chanctx_mode chanmode,
3354 u8 radar_detect)
3355 {
3356 struct ieee80211_local *local = sdata->local;
3357 struct ieee80211_sub_if_data *sdata_iter;
3358 enum nl80211_iftype iftype = sdata->wdev.iftype;
3359 struct ieee80211_chanctx *ctx;
3360 int total = 1;
3361 struct iface_combination_params params = {
3362 .radar_detect = radar_detect,
3363 };
3364
3365 lockdep_assert_held(&local->chanctx_mtx);
3366
3367 if (WARN_ON(hweight32(radar_detect) > 1))
3368 return -EINVAL;
3369
3370 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3371 !chandef->chan))
3372 return -EINVAL;
3373
3374 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3375 return -EINVAL;
3376
3377 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3378 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3379 /*
3380 * always passing this is harmless, since it'll be the
3381 * same value that cfg80211 finds if it finds the same
3382 * interface ... and that's always allowed
3383 */
3384 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3385 }
3386
3387 /* Always allow software iftypes */
3388 if (local->hw.wiphy->software_iftypes & BIT(iftype) ||
3389 (iftype == NL80211_IFTYPE_AP_VLAN &&
3390 local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) {
3391 if (radar_detect)
3392 return -EINVAL;
3393 return 0;
3394 }
3395
3396 if (chandef)
3397 params.num_different_channels = 1;
3398
3399 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3400 params.iftype_num[iftype] = 1;
3401
3402 list_for_each_entry(ctx, &local->chanctx_list, list) {
3403 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3404 continue;
3405 params.radar_detect |=
3406 ieee80211_chanctx_radar_detect(local, ctx);
3407 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3408 params.num_different_channels++;
3409 continue;
3410 }
3411 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3412 cfg80211_chandef_compatible(chandef,
3413 &ctx->conf.def))
3414 continue;
3415 params.num_different_channels++;
3416 }
3417
3418 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3419 struct wireless_dev *wdev_iter;
3420
3421 wdev_iter = &sdata_iter->wdev;
3422
3423 if (sdata_iter == sdata ||
3424 !ieee80211_sdata_running(sdata_iter) ||
3425 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3426 continue;
3427
3428 params.iftype_num[wdev_iter->iftype]++;
3429 total++;
3430 }
3431
3432 if (total == 1 && !params.radar_detect)
3433 return 0;
3434
3435 return cfg80211_check_combinations(local->hw.wiphy, &params);
3436 }
3437
3438 static void
3439 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3440 void *data)
3441 {
3442 u32 *max_num_different_channels = data;
3443
3444 *max_num_different_channels = max(*max_num_different_channels,
3445 c->num_different_channels);
3446 }
3447
3448 int ieee80211_max_num_channels(struct ieee80211_local *local)
3449 {
3450 struct ieee80211_sub_if_data *sdata;
3451 struct ieee80211_chanctx *ctx;
3452 u32 max_num_different_channels = 1;
3453 int err;
3454 struct iface_combination_params params = {0};
3455
3456 lockdep_assert_held(&local->chanctx_mtx);
3457
3458 list_for_each_entry(ctx, &local->chanctx_list, list) {
3459 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3460 continue;
3461
3462 params.num_different_channels++;
3463
3464 params.radar_detect |=
3465 ieee80211_chanctx_radar_detect(local, ctx);
3466 }
3467
3468 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3469 params.iftype_num[sdata->wdev.iftype]++;
3470
3471 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3472 ieee80211_iter_max_chans,
3473 &max_num_different_channels);
3474 if (err < 0)
3475 return err;
3476
3477 return max_num_different_channels;
3478 }
3479
3480 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3481 {
3482 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3483 *buf++ = 7; /* len */
3484 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3485 *buf++ = 0x50;
3486 *buf++ = 0xf2;
3487 *buf++ = 2; /* WME */
3488 *buf++ = 0; /* WME info */
3489 *buf++ = 1; /* WME ver */
3490 *buf++ = qosinfo; /* U-APSD no in use */
3491
3492 return buf;
3493 }
3494
3495 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3496 unsigned long *frame_cnt,
3497 unsigned long *byte_cnt)
3498 {
3499 struct txq_info *txqi = to_txq_info(txq);
3500 u32 frag_cnt = 0, frag_bytes = 0;
3501 struct sk_buff *skb;
3502
3503 skb_queue_walk(&txqi->frags, skb) {
3504 frag_cnt++;
3505 frag_bytes += skb->len;
3506 }
3507
3508 if (frame_cnt)
3509 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3510
3511 if (byte_cnt)
3512 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3513 }
3514 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3515
3516 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3517 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3518 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3519 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3520 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3521 };
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