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 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
wiphy_to_ieee80211_hw(struct wiphy * wiphy)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
ieee80211_tx_set_protected(struct ieee80211_tx_data * tx)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
ieee80211_frame_duration(enum nl80211_band band,size_t len,int rate,int erp,int short_preamble,int shift)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 */
ieee80211_generic_frame_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum nl80211_band band,size_t frame_len,struct ieee80211_rate * rate)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
ieee80211_rts_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,size_t frame_len,const struct ieee80211_tx_info * frame_txctl)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
ieee80211_ctstoself_duration(struct ieee80211_hw * hw,struct ieee80211_vif * vif,size_t frame_len,const struct ieee80211_tx_info * frame_txctl)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
ieee80211_propagate_queue_wake(struct ieee80211_local * local,int queue)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
__ieee80211_wake_queue(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)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
ieee80211_wake_queue_by_reason(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)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
ieee80211_wake_queue(struct ieee80211_hw * hw,int queue)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
__ieee80211_stop_queue(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)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
ieee80211_stop_queue_by_reason(struct ieee80211_hw * hw,int queue,enum queue_stop_reason reason,bool refcounted)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
ieee80211_stop_queue(struct ieee80211_hw * hw,int queue)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
ieee80211_add_pending_skb(struct ieee80211_local * local,struct sk_buff * skb)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
ieee80211_add_pending_skbs(struct ieee80211_local * local,struct sk_buff_head * skbs)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
ieee80211_stop_queues_by_reason(struct ieee80211_hw * hw,unsigned long queues,enum queue_stop_reason reason,bool refcounted)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
ieee80211_stop_queues(struct ieee80211_hw * hw)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
ieee80211_queue_stopped(struct ieee80211_hw * hw,int queue)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
ieee80211_wake_queues_by_reason(struct ieee80211_hw * hw,unsigned long queues,enum queue_stop_reason reason,bool refcounted)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
ieee80211_wake_queues(struct ieee80211_hw * hw)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
ieee80211_get_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)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
__ieee80211_flush_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,unsigned int queues,bool drop)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
ieee80211_flush_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,bool drop)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
ieee80211_stop_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,enum queue_stop_reason reason)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
ieee80211_wake_vif_queues(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,enum queue_stop_reason reason)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
__iterate_interfaces(struct ieee80211_local * local,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)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
ieee80211_iterate_interfaces(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)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
ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)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
ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw * hw,u32 iter_flags,void (* iterator)(void * data,u8 * mac,struct ieee80211_vif * vif),void * data)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
__iterate_stations(struct ieee80211_local * local,void (* iterator)(void * data,struct ieee80211_sta * sta),void * data)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
ieee80211_iterate_stations_atomic(struct ieee80211_hw * hw,void (* iterator)(void * data,struct ieee80211_sta * sta),void * data)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
wdev_to_ieee80211_vif(struct wireless_dev * wdev)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
ieee80211_vif_to_wdev(struct ieee80211_vif * vif)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 */
ieee80211_can_queue_work(struct ieee80211_local * local)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
ieee80211_queue_work(struct ieee80211_hw * hw,struct work_struct * work)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
ieee80211_queue_delayed_work(struct ieee80211_hw * hw,struct delayed_work * dwork,unsigned long delay)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
ieee802_11_parse_elems_crc(const u8 * start,size_t len,bool action,struct ieee802_11_elems * elems,u64 filter,u32 crc)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 case WLAN_EID_EXTENSION:
1099 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1100 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1101 elems->mu_edca_param_set = (void *)&pos[1];
1102 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1103 elems->he_cap = (void *)&pos[1];
1104 elems->he_cap_len = elen - 1;
1105 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1106 elen >= sizeof(*elems->he_operation) &&
1107 elen >= ieee80211_he_oper_size(&pos[1])) {
1108 elems->he_operation = (void *)&pos[1];
1109 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1110 elems->uora_element = (void *)&pos[1];
1111 }
1112 break;
1113 default:
1114 break;
1115 }
1116
1117 if (elem_parse_failed)
1118 elems->parse_error = true;
1119 else
1120 __set_bit(id, seen_elems);
1121
1122 left -= elen;
1123 pos += elen;
1124 }
1125
1126 if (left != 0)
1127 elems->parse_error = true;
1128
1129 return crc;
1130 }
1131
ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data * sdata,struct ieee80211_tx_queue_params * qparam,int ac)1132 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1133 struct ieee80211_tx_queue_params
1134 *qparam, int ac)
1135 {
1136 struct ieee80211_chanctx_conf *chanctx_conf;
1137 const struct ieee80211_reg_rule *rrule;
1138 const struct ieee80211_wmm_ac *wmm_ac;
1139 u16 center_freq = 0;
1140
1141 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1142 sdata->vif.type != NL80211_IFTYPE_STATION)
1143 return;
1144
1145 rcu_read_lock();
1146 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1147 if (chanctx_conf)
1148 center_freq = chanctx_conf->def.chan->center_freq;
1149
1150 if (!center_freq) {
1151 rcu_read_unlock();
1152 return;
1153 }
1154
1155 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1156
1157 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1158 rcu_read_unlock();
1159 return;
1160 }
1161
1162 if (sdata->vif.type == NL80211_IFTYPE_AP)
1163 wmm_ac = &rrule->wmm_rule.ap[ac];
1164 else
1165 wmm_ac = &rrule->wmm_rule.client[ac];
1166 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1167 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1168 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1169 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1170 rcu_read_unlock();
1171 }
1172
ieee80211_set_wmm_default(struct ieee80211_sub_if_data * sdata,bool bss_notify,bool enable_qos)1173 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1174 bool bss_notify, bool enable_qos)
1175 {
1176 struct ieee80211_local *local = sdata->local;
1177 struct ieee80211_tx_queue_params qparam;
1178 struct ieee80211_chanctx_conf *chanctx_conf;
1179 int ac;
1180 bool use_11b;
1181 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1182 int aCWmin, aCWmax;
1183
1184 if (!local->ops->conf_tx)
1185 return;
1186
1187 if (local->hw.queues < IEEE80211_NUM_ACS)
1188 return;
1189
1190 memset(&qparam, 0, sizeof(qparam));
1191
1192 rcu_read_lock();
1193 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1194 use_11b = (chanctx_conf &&
1195 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1196 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1197 rcu_read_unlock();
1198
1199 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1200
1201 /* Set defaults according to 802.11-2007 Table 7-37 */
1202 aCWmax = 1023;
1203 if (use_11b)
1204 aCWmin = 31;
1205 else
1206 aCWmin = 15;
1207
1208 /* Confiure old 802.11b/g medium access rules. */
1209 qparam.cw_max = aCWmax;
1210 qparam.cw_min = aCWmin;
1211 qparam.txop = 0;
1212 qparam.aifs = 2;
1213
1214 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1215 /* Update if QoS is enabled. */
1216 if (enable_qos) {
1217 switch (ac) {
1218 case IEEE80211_AC_BK:
1219 qparam.cw_max = aCWmax;
1220 qparam.cw_min = aCWmin;
1221 qparam.txop = 0;
1222 if (is_ocb)
1223 qparam.aifs = 9;
1224 else
1225 qparam.aifs = 7;
1226 break;
1227 /* never happens but let's not leave undefined */
1228 default:
1229 case IEEE80211_AC_BE:
1230 qparam.cw_max = aCWmax;
1231 qparam.cw_min = aCWmin;
1232 qparam.txop = 0;
1233 if (is_ocb)
1234 qparam.aifs = 6;
1235 else
1236 qparam.aifs = 3;
1237 break;
1238 case IEEE80211_AC_VI:
1239 qparam.cw_max = aCWmin;
1240 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1241 if (is_ocb)
1242 qparam.txop = 0;
1243 else if (use_11b)
1244 qparam.txop = 6016/32;
1245 else
1246 qparam.txop = 3008/32;
1247
1248 if (is_ocb)
1249 qparam.aifs = 3;
1250 else
1251 qparam.aifs = 2;
1252 break;
1253 case IEEE80211_AC_VO:
1254 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1255 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1256 if (is_ocb)
1257 qparam.txop = 0;
1258 else if (use_11b)
1259 qparam.txop = 3264/32;
1260 else
1261 qparam.txop = 1504/32;
1262 qparam.aifs = 2;
1263 break;
1264 }
1265 }
1266 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1267
1268 qparam.uapsd = false;
1269
1270 sdata->tx_conf[ac] = qparam;
1271 drv_conf_tx(local, sdata, ac, &qparam);
1272 }
1273
1274 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1275 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1276 sdata->vif.type != NL80211_IFTYPE_NAN) {
1277 sdata->vif.bss_conf.qos = enable_qos;
1278 if (bss_notify)
1279 ieee80211_bss_info_change_notify(sdata,
1280 BSS_CHANGED_QOS);
1281 }
1282 }
1283
ieee80211_send_auth(struct ieee80211_sub_if_data * sdata,u16 transaction,u16 auth_alg,u16 status,const u8 * extra,size_t extra_len,const u8 * da,const u8 * bssid,const u8 * key,u8 key_len,u8 key_idx,u32 tx_flags)1284 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1285 u16 transaction, u16 auth_alg, u16 status,
1286 const u8 *extra, size_t extra_len, const u8 *da,
1287 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1288 u32 tx_flags)
1289 {
1290 struct ieee80211_local *local = sdata->local;
1291 struct sk_buff *skb;
1292 struct ieee80211_mgmt *mgmt;
1293 int err;
1294
1295 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1296 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1297 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1298 if (!skb)
1299 return;
1300
1301 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1302
1303 mgmt = skb_put_zero(skb, 24 + 6);
1304 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1305 IEEE80211_STYPE_AUTH);
1306 memcpy(mgmt->da, da, ETH_ALEN);
1307 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1308 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1309 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1310 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1311 mgmt->u.auth.status_code = cpu_to_le16(status);
1312 if (extra)
1313 skb_put_data(skb, extra, extra_len);
1314
1315 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1316 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1317 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1318 WARN_ON(err);
1319 }
1320
1321 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1322 tx_flags;
1323 ieee80211_tx_skb(sdata, skb);
1324 }
1325
ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data * sdata,const u8 * bssid,u16 stype,u16 reason,bool send_frame,u8 * frame_buf)1326 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1327 const u8 *bssid, u16 stype, u16 reason,
1328 bool send_frame, u8 *frame_buf)
1329 {
1330 struct ieee80211_local *local = sdata->local;
1331 struct sk_buff *skb;
1332 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1333
1334 /* build frame */
1335 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1336 mgmt->duration = 0; /* initialize only */
1337 mgmt->seq_ctrl = 0; /* initialize only */
1338 memcpy(mgmt->da, bssid, ETH_ALEN);
1339 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1340 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1341 /* u.deauth.reason_code == u.disassoc.reason_code */
1342 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1343
1344 if (send_frame) {
1345 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1346 IEEE80211_DEAUTH_FRAME_LEN);
1347 if (!skb)
1348 return;
1349
1350 skb_reserve(skb, local->hw.extra_tx_headroom);
1351
1352 /* copy in frame */
1353 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1354
1355 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1356 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1357 IEEE80211_SKB_CB(skb)->flags |=
1358 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1359
1360 ieee80211_tx_skb(sdata, skb);
1361 }
1362 }
1363
ieee80211_build_preq_ies_band(struct ieee80211_local * local,u8 * buffer,size_t buffer_len,const u8 * ie,size_t ie_len,enum nl80211_band band,u32 rate_mask,struct cfg80211_chan_def * chandef,size_t * offset,u32 flags)1364 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1365 u8 *buffer, size_t buffer_len,
1366 const u8 *ie, size_t ie_len,
1367 enum nl80211_band band,
1368 u32 rate_mask,
1369 struct cfg80211_chan_def *chandef,
1370 size_t *offset, u32 flags)
1371 {
1372 struct ieee80211_supported_band *sband;
1373 const struct ieee80211_sta_he_cap *he_cap;
1374 u8 *pos = buffer, *end = buffer + buffer_len;
1375 size_t noffset;
1376 int supp_rates_len, i;
1377 u8 rates[32];
1378 int num_rates;
1379 int ext_rates_len;
1380 int shift;
1381 u32 rate_flags;
1382 bool have_80mhz = false;
1383
1384 *offset = 0;
1385
1386 sband = local->hw.wiphy->bands[band];
1387 if (WARN_ON_ONCE(!sband))
1388 return 0;
1389
1390 rate_flags = ieee80211_chandef_rate_flags(chandef);
1391 shift = ieee80211_chandef_get_shift(chandef);
1392
1393 num_rates = 0;
1394 for (i = 0; i < sband->n_bitrates; i++) {
1395 if ((BIT(i) & rate_mask) == 0)
1396 continue; /* skip rate */
1397 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1398 continue;
1399
1400 rates[num_rates++] =
1401 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1402 (1 << shift) * 5);
1403 }
1404
1405 supp_rates_len = min_t(int, num_rates, 8);
1406
1407 if (end - pos < 2 + supp_rates_len)
1408 goto out_err;
1409 *pos++ = WLAN_EID_SUPP_RATES;
1410 *pos++ = supp_rates_len;
1411 memcpy(pos, rates, supp_rates_len);
1412 pos += supp_rates_len;
1413
1414 /* insert "request information" if in custom IEs */
1415 if (ie && ie_len) {
1416 static const u8 before_extrates[] = {
1417 WLAN_EID_SSID,
1418 WLAN_EID_SUPP_RATES,
1419 WLAN_EID_REQUEST,
1420 };
1421 noffset = ieee80211_ie_split(ie, ie_len,
1422 before_extrates,
1423 ARRAY_SIZE(before_extrates),
1424 *offset);
1425 if (end - pos < noffset - *offset)
1426 goto out_err;
1427 memcpy(pos, ie + *offset, noffset - *offset);
1428 pos += noffset - *offset;
1429 *offset = noffset;
1430 }
1431
1432 ext_rates_len = num_rates - supp_rates_len;
1433 if (ext_rates_len > 0) {
1434 if (end - pos < 2 + ext_rates_len)
1435 goto out_err;
1436 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1437 *pos++ = ext_rates_len;
1438 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1439 pos += ext_rates_len;
1440 }
1441
1442 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1443 if (end - pos < 3)
1444 goto out_err;
1445 *pos++ = WLAN_EID_DS_PARAMS;
1446 *pos++ = 1;
1447 *pos++ = ieee80211_frequency_to_channel(
1448 chandef->chan->center_freq);
1449 }
1450
1451 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1452 goto done;
1453
1454 /* insert custom IEs that go before HT */
1455 if (ie && ie_len) {
1456 static const u8 before_ht[] = {
1457 /*
1458 * no need to list the ones split off already
1459 * (or generated here)
1460 */
1461 WLAN_EID_DS_PARAMS,
1462 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1463 };
1464 noffset = ieee80211_ie_split(ie, ie_len,
1465 before_ht, ARRAY_SIZE(before_ht),
1466 *offset);
1467 if (end - pos < noffset - *offset)
1468 goto out_err;
1469 memcpy(pos, ie + *offset, noffset - *offset);
1470 pos += noffset - *offset;
1471 *offset = noffset;
1472 }
1473
1474 if (sband->ht_cap.ht_supported) {
1475 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1476 goto out_err;
1477 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1478 sband->ht_cap.cap);
1479 }
1480
1481 /* insert custom IEs that go before VHT */
1482 if (ie && ie_len) {
1483 static const u8 before_vht[] = {
1484 /*
1485 * no need to list the ones split off already
1486 * (or generated here)
1487 */
1488 WLAN_EID_BSS_COEX_2040,
1489 WLAN_EID_EXT_CAPABILITY,
1490 WLAN_EID_SSID_LIST,
1491 WLAN_EID_CHANNEL_USAGE,
1492 WLAN_EID_INTERWORKING,
1493 WLAN_EID_MESH_ID,
1494 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1495 };
1496 noffset = ieee80211_ie_split(ie, ie_len,
1497 before_vht, ARRAY_SIZE(before_vht),
1498 *offset);
1499 if (end - pos < noffset - *offset)
1500 goto out_err;
1501 memcpy(pos, ie + *offset, noffset - *offset);
1502 pos += noffset - *offset;
1503 *offset = noffset;
1504 }
1505
1506 /* Check if any channel in this sband supports at least 80 MHz */
1507 for (i = 0; i < sband->n_channels; i++) {
1508 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1509 IEEE80211_CHAN_NO_80MHZ))
1510 continue;
1511
1512 have_80mhz = true;
1513 break;
1514 }
1515
1516 if (sband->vht_cap.vht_supported && have_80mhz) {
1517 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1518 goto out_err;
1519 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1520 sband->vht_cap.cap);
1521 }
1522
1523 /* insert custom IEs that go before HE */
1524 if (ie && ie_len) {
1525 static const u8 before_he[] = {
1526 /*
1527 * no need to list the ones split off before VHT
1528 * or generated here
1529 */
1530 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1531 WLAN_EID_AP_CSN,
1532 /* TODO: add 11ah/11aj/11ak elements */
1533 };
1534 noffset = ieee80211_ie_split(ie, ie_len,
1535 before_he, ARRAY_SIZE(before_he),
1536 *offset);
1537 if (end - pos < noffset - *offset)
1538 goto out_err;
1539 memcpy(pos, ie + *offset, noffset - *offset);
1540 pos += noffset - *offset;
1541 *offset = noffset;
1542 }
1543
1544 he_cap = ieee80211_get_he_sta_cap(sband);
1545 if (he_cap) {
1546 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1547 if (!pos)
1548 goto out_err;
1549 }
1550
1551 /*
1552 * If adding more here, adjust code in main.c
1553 * that calculates local->scan_ies_len.
1554 */
1555
1556 return pos - buffer;
1557 out_err:
1558 WARN_ONCE(1, "not enough space for preq IEs\n");
1559 done:
1560 return pos - buffer;
1561 }
1562
ieee80211_build_preq_ies(struct ieee80211_local * local,u8 * buffer,size_t buffer_len,struct ieee80211_scan_ies * ie_desc,const u8 * ie,size_t ie_len,u8 bands_used,u32 * rate_masks,struct cfg80211_chan_def * chandef,u32 flags)1563 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1564 size_t buffer_len,
1565 struct ieee80211_scan_ies *ie_desc,
1566 const u8 *ie, size_t ie_len,
1567 u8 bands_used, u32 *rate_masks,
1568 struct cfg80211_chan_def *chandef,
1569 u32 flags)
1570 {
1571 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1572 int i;
1573
1574 memset(ie_desc, 0, sizeof(*ie_desc));
1575
1576 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1577 if (bands_used & BIT(i)) {
1578 pos += ieee80211_build_preq_ies_band(local,
1579 buffer + pos,
1580 buffer_len - pos,
1581 ie, ie_len, i,
1582 rate_masks[i],
1583 chandef,
1584 &custom_ie_offset,
1585 flags);
1586 ie_desc->ies[i] = buffer + old_pos;
1587 ie_desc->len[i] = pos - old_pos;
1588 old_pos = pos;
1589 }
1590 }
1591
1592 /* add any remaining custom IEs */
1593 if (ie && ie_len) {
1594 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1595 "not enough space for preq custom IEs\n"))
1596 return pos;
1597 memcpy(buffer + pos, ie + custom_ie_offset,
1598 ie_len - custom_ie_offset);
1599 ie_desc->common_ies = buffer + pos;
1600 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1601 pos += ie_len - custom_ie_offset;
1602 }
1603
1604 return pos;
1605 };
1606
ieee80211_build_probe_req(struct ieee80211_sub_if_data * sdata,const u8 * src,const u8 * dst,u32 ratemask,struct ieee80211_channel * chan,const u8 * ssid,size_t ssid_len,const u8 * ie,size_t ie_len,u32 flags)1607 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1608 const u8 *src, const u8 *dst,
1609 u32 ratemask,
1610 struct ieee80211_channel *chan,
1611 const u8 *ssid, size_t ssid_len,
1612 const u8 *ie, size_t ie_len,
1613 u32 flags)
1614 {
1615 struct ieee80211_local *local = sdata->local;
1616 struct cfg80211_chan_def chandef;
1617 struct sk_buff *skb;
1618 struct ieee80211_mgmt *mgmt;
1619 int ies_len;
1620 u32 rate_masks[NUM_NL80211_BANDS] = {};
1621 struct ieee80211_scan_ies dummy_ie_desc;
1622
1623 /*
1624 * Do not send DS Channel parameter for directed probe requests
1625 * in order to maximize the chance that we get a response. Some
1626 * badly-behaved APs don't respond when this parameter is included.
1627 */
1628 chandef.width = sdata->vif.bss_conf.chandef.width;
1629 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1630 chandef.chan = NULL;
1631 else
1632 chandef.chan = chan;
1633
1634 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1635 100 + ie_len);
1636 if (!skb)
1637 return NULL;
1638
1639 rate_masks[chan->band] = ratemask;
1640 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1641 skb_tailroom(skb), &dummy_ie_desc,
1642 ie, ie_len, BIT(chan->band),
1643 rate_masks, &chandef, flags);
1644 skb_put(skb, ies_len);
1645
1646 if (dst) {
1647 mgmt = (struct ieee80211_mgmt *) skb->data;
1648 memcpy(mgmt->da, dst, ETH_ALEN);
1649 memcpy(mgmt->bssid, dst, ETH_ALEN);
1650 }
1651
1652 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1653
1654 return skb;
1655 }
1656
ieee80211_sta_get_rates(struct ieee80211_sub_if_data * sdata,struct ieee802_11_elems * elems,enum nl80211_band band,u32 * basic_rates)1657 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1658 struct ieee802_11_elems *elems,
1659 enum nl80211_band band, u32 *basic_rates)
1660 {
1661 struct ieee80211_supported_band *sband;
1662 size_t num_rates;
1663 u32 supp_rates, rate_flags;
1664 int i, j, shift;
1665
1666 sband = sdata->local->hw.wiphy->bands[band];
1667 if (WARN_ON(!sband))
1668 return 1;
1669
1670 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1671 shift = ieee80211_vif_get_shift(&sdata->vif);
1672
1673 num_rates = sband->n_bitrates;
1674 supp_rates = 0;
1675 for (i = 0; i < elems->supp_rates_len +
1676 elems->ext_supp_rates_len; i++) {
1677 u8 rate = 0;
1678 int own_rate;
1679 bool is_basic;
1680 if (i < elems->supp_rates_len)
1681 rate = elems->supp_rates[i];
1682 else if (elems->ext_supp_rates)
1683 rate = elems->ext_supp_rates
1684 [i - elems->supp_rates_len];
1685 own_rate = 5 * (rate & 0x7f);
1686 is_basic = !!(rate & 0x80);
1687
1688 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1689 continue;
1690
1691 for (j = 0; j < num_rates; j++) {
1692 int brate;
1693 if ((rate_flags & sband->bitrates[j].flags)
1694 != rate_flags)
1695 continue;
1696
1697 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1698 1 << shift);
1699
1700 if (brate == own_rate) {
1701 supp_rates |= BIT(j);
1702 if (basic_rates && is_basic)
1703 *basic_rates |= BIT(j);
1704 }
1705 }
1706 }
1707 return supp_rates;
1708 }
1709
ieee80211_stop_device(struct ieee80211_local * local)1710 void ieee80211_stop_device(struct ieee80211_local *local)
1711 {
1712 ieee80211_led_radio(local, false);
1713 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1714
1715 cancel_work_sync(&local->reconfig_filter);
1716
1717 flush_workqueue(local->workqueue);
1718 drv_stop(local);
1719 }
1720
ieee80211_flush_completed_scan(struct ieee80211_local * local,bool aborted)1721 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1722 bool aborted)
1723 {
1724 /* It's possible that we don't handle the scan completion in
1725 * time during suspend, so if it's still marked as completed
1726 * here, queue the work and flush it to clean things up.
1727 * Instead of calling the worker function directly here, we
1728 * really queue it to avoid potential races with other flows
1729 * scheduling the same work.
1730 */
1731 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1732 /* If coming from reconfiguration failure, abort the scan so
1733 * we don't attempt to continue a partial HW scan - which is
1734 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1735 * completed scan, and a 5 GHz portion is still pending.
1736 */
1737 if (aborted)
1738 set_bit(SCAN_ABORTED, &local->scanning);
1739 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1740 flush_delayed_work(&local->scan_work);
1741 }
1742 }
1743
ieee80211_handle_reconfig_failure(struct ieee80211_local * local)1744 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1745 {
1746 struct ieee80211_sub_if_data *sdata;
1747 struct ieee80211_chanctx *ctx;
1748
1749 /*
1750 * We get here if during resume the device can't be restarted properly.
1751 * We might also get here if this happens during HW reset, which is a
1752 * slightly different situation and we need to drop all connections in
1753 * the latter case.
1754 *
1755 * Ask cfg80211 to turn off all interfaces, this will result in more
1756 * warnings but at least we'll then get into a clean stopped state.
1757 */
1758
1759 local->resuming = false;
1760 local->suspended = false;
1761 local->in_reconfig = false;
1762
1763 ieee80211_flush_completed_scan(local, true);
1764
1765 /* scheduled scan clearly can't be running any more, but tell
1766 * cfg80211 and clear local state
1767 */
1768 ieee80211_sched_scan_end(local);
1769
1770 list_for_each_entry(sdata, &local->interfaces, list)
1771 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1772
1773 /* Mark channel contexts as not being in the driver any more to avoid
1774 * removing them from the driver during the shutdown process...
1775 */
1776 mutex_lock(&local->chanctx_mtx);
1777 list_for_each_entry(ctx, &local->chanctx_list, list)
1778 ctx->driver_present = false;
1779 mutex_unlock(&local->chanctx_mtx);
1780
1781 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1782 }
1783
ieee80211_assign_chanctx(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)1784 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1785 struct ieee80211_sub_if_data *sdata)
1786 {
1787 struct ieee80211_chanctx_conf *conf;
1788 struct ieee80211_chanctx *ctx;
1789
1790 if (!local->use_chanctx)
1791 return;
1792
1793 mutex_lock(&local->chanctx_mtx);
1794 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1795 lockdep_is_held(&local->chanctx_mtx));
1796 if (conf) {
1797 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1798 drv_assign_vif_chanctx(local, sdata, ctx);
1799 }
1800 mutex_unlock(&local->chanctx_mtx);
1801 }
1802
ieee80211_reconfig_stations(struct ieee80211_sub_if_data * sdata)1803 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1804 {
1805 struct ieee80211_local *local = sdata->local;
1806 struct sta_info *sta;
1807
1808 /* add STAs back */
1809 mutex_lock(&local->sta_mtx);
1810 list_for_each_entry(sta, &local->sta_list, list) {
1811 enum ieee80211_sta_state state;
1812
1813 if (!sta->uploaded || sta->sdata != sdata)
1814 continue;
1815
1816 for (state = IEEE80211_STA_NOTEXIST;
1817 state < sta->sta_state; state++)
1818 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1819 state + 1));
1820 }
1821 mutex_unlock(&local->sta_mtx);
1822 }
1823
ieee80211_reconfig_nan(struct ieee80211_sub_if_data * sdata)1824 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1825 {
1826 struct cfg80211_nan_func *func, **funcs;
1827 int res, id, i = 0;
1828
1829 res = drv_start_nan(sdata->local, sdata,
1830 &sdata->u.nan.conf);
1831 if (WARN_ON(res))
1832 return res;
1833
1834 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1835 sizeof(*funcs),
1836 GFP_KERNEL);
1837 if (!funcs)
1838 return -ENOMEM;
1839
1840 /* Add all the functions:
1841 * This is a little bit ugly. We need to call a potentially sleeping
1842 * callback for each NAN function, so we can't hold the spinlock.
1843 */
1844 spin_lock_bh(&sdata->u.nan.func_lock);
1845
1846 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1847 funcs[i++] = func;
1848
1849 spin_unlock_bh(&sdata->u.nan.func_lock);
1850
1851 for (i = 0; funcs[i]; i++) {
1852 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1853 if (WARN_ON(res))
1854 ieee80211_nan_func_terminated(&sdata->vif,
1855 funcs[i]->instance_id,
1856 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1857 GFP_KERNEL);
1858 }
1859
1860 kfree(funcs);
1861
1862 return 0;
1863 }
1864
ieee80211_reconfig(struct ieee80211_local * local)1865 int ieee80211_reconfig(struct ieee80211_local *local)
1866 {
1867 struct ieee80211_hw *hw = &local->hw;
1868 struct ieee80211_sub_if_data *sdata;
1869 struct ieee80211_chanctx *ctx;
1870 struct sta_info *sta;
1871 int res, i;
1872 bool reconfig_due_to_wowlan = false;
1873 struct ieee80211_sub_if_data *sched_scan_sdata;
1874 struct cfg80211_sched_scan_request *sched_scan_req;
1875 bool sched_scan_stopped = false;
1876 bool suspended = local->suspended;
1877
1878 /* nothing to do if HW shouldn't run */
1879 if (!local->open_count)
1880 goto wake_up;
1881
1882 #ifdef CONFIG_PM
1883 if (suspended)
1884 local->resuming = true;
1885
1886 if (local->wowlan) {
1887 /*
1888 * In the wowlan case, both mac80211 and the device
1889 * are functional when the resume op is called, so
1890 * clear local->suspended so the device could operate
1891 * normally (e.g. pass rx frames).
1892 */
1893 local->suspended = false;
1894 res = drv_resume(local);
1895 local->wowlan = false;
1896 if (res < 0) {
1897 local->resuming = false;
1898 return res;
1899 }
1900 if (res == 0)
1901 goto wake_up;
1902 WARN_ON(res > 1);
1903 /*
1904 * res is 1, which means the driver requested
1905 * to go through a regular reset on wakeup.
1906 * restore local->suspended in this case.
1907 */
1908 reconfig_due_to_wowlan = true;
1909 local->suspended = true;
1910 }
1911 #endif
1912
1913 /*
1914 * In case of hw_restart during suspend (without wowlan),
1915 * cancel restart work, as we are reconfiguring the device
1916 * anyway.
1917 * Note that restart_work is scheduled on a frozen workqueue,
1918 * so we can't deadlock in this case.
1919 */
1920 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1921 cancel_work_sync(&local->restart_work);
1922
1923 local->started = false;
1924
1925 /*
1926 * Upon resume hardware can sometimes be goofy due to
1927 * various platform / driver / bus issues, so restarting
1928 * the device may at times not work immediately. Propagate
1929 * the error.
1930 */
1931 res = drv_start(local);
1932 if (res) {
1933 if (suspended)
1934 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1935 else
1936 WARN(1, "Hardware became unavailable during restart.\n");
1937 ieee80211_handle_reconfig_failure(local);
1938 return res;
1939 }
1940
1941 /* setup fragmentation threshold */
1942 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1943
1944 /* setup RTS threshold */
1945 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1946
1947 /* reset coverage class */
1948 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1949
1950 ieee80211_led_radio(local, true);
1951 ieee80211_mod_tpt_led_trig(local,
1952 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1953
1954 /* add interfaces */
1955 sdata = rtnl_dereference(local->monitor_sdata);
1956 if (sdata) {
1957 /* in HW restart it exists already */
1958 WARN_ON(local->resuming);
1959 res = drv_add_interface(local, sdata);
1960 if (WARN_ON(res)) {
1961 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1962 synchronize_net();
1963 kfree(sdata);
1964 }
1965 }
1966
1967 list_for_each_entry(sdata, &local->interfaces, list) {
1968 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1969 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1970 ieee80211_sdata_running(sdata)) {
1971 res = drv_add_interface(local, sdata);
1972 if (WARN_ON(res))
1973 break;
1974 }
1975 }
1976
1977 /* If adding any of the interfaces failed above, roll back and
1978 * report failure.
1979 */
1980 if (res) {
1981 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1982 list)
1983 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1984 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1985 ieee80211_sdata_running(sdata))
1986 drv_remove_interface(local, sdata);
1987 ieee80211_handle_reconfig_failure(local);
1988 return res;
1989 }
1990
1991 /* add channel contexts */
1992 if (local->use_chanctx) {
1993 mutex_lock(&local->chanctx_mtx);
1994 list_for_each_entry(ctx, &local->chanctx_list, list)
1995 if (ctx->replace_state !=
1996 IEEE80211_CHANCTX_REPLACES_OTHER)
1997 WARN_ON(drv_add_chanctx(local, ctx));
1998 mutex_unlock(&local->chanctx_mtx);
1999
2000 sdata = rtnl_dereference(local->monitor_sdata);
2001 if (sdata && ieee80211_sdata_running(sdata))
2002 ieee80211_assign_chanctx(local, sdata);
2003 }
2004
2005 /* reconfigure hardware */
2006 ieee80211_hw_config(local, ~0);
2007
2008 ieee80211_configure_filter(local);
2009
2010 /* Finally also reconfigure all the BSS information */
2011 list_for_each_entry(sdata, &local->interfaces, list) {
2012 u32 changed;
2013
2014 if (!ieee80211_sdata_running(sdata))
2015 continue;
2016
2017 ieee80211_assign_chanctx(local, sdata);
2018
2019 switch (sdata->vif.type) {
2020 case NL80211_IFTYPE_AP_VLAN:
2021 case NL80211_IFTYPE_MONITOR:
2022 break;
2023 default:
2024 ieee80211_reconfig_stations(sdata);
2025 /* fall through */
2026 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2027 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2028 drv_conf_tx(local, sdata, i,
2029 &sdata->tx_conf[i]);
2030 break;
2031 }
2032
2033 /* common change flags for all interface types */
2034 changed = BSS_CHANGED_ERP_CTS_PROT |
2035 BSS_CHANGED_ERP_PREAMBLE |
2036 BSS_CHANGED_ERP_SLOT |
2037 BSS_CHANGED_HT |
2038 BSS_CHANGED_BASIC_RATES |
2039 BSS_CHANGED_BEACON_INT |
2040 BSS_CHANGED_BSSID |
2041 BSS_CHANGED_CQM |
2042 BSS_CHANGED_QOS |
2043 BSS_CHANGED_IDLE |
2044 BSS_CHANGED_TXPOWER |
2045 BSS_CHANGED_MCAST_RATE;
2046
2047 if (sdata->vif.mu_mimo_owner)
2048 changed |= BSS_CHANGED_MU_GROUPS;
2049
2050 switch (sdata->vif.type) {
2051 case NL80211_IFTYPE_STATION:
2052 changed |= BSS_CHANGED_ASSOC |
2053 BSS_CHANGED_ARP_FILTER |
2054 BSS_CHANGED_PS;
2055
2056 /* Re-send beacon info report to the driver */
2057 if (sdata->u.mgd.have_beacon)
2058 changed |= BSS_CHANGED_BEACON_INFO;
2059
2060 if (sdata->vif.bss_conf.max_idle_period ||
2061 sdata->vif.bss_conf.protected_keep_alive)
2062 changed |= BSS_CHANGED_KEEP_ALIVE;
2063
2064 sdata_lock(sdata);
2065 ieee80211_bss_info_change_notify(sdata, changed);
2066 sdata_unlock(sdata);
2067 break;
2068 case NL80211_IFTYPE_OCB:
2069 changed |= BSS_CHANGED_OCB;
2070 ieee80211_bss_info_change_notify(sdata, changed);
2071 break;
2072 case NL80211_IFTYPE_ADHOC:
2073 changed |= BSS_CHANGED_IBSS;
2074 /* fall through */
2075 case NL80211_IFTYPE_AP:
2076 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2077
2078 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2079 changed |= BSS_CHANGED_AP_PROBE_RESP;
2080
2081 if (rcu_access_pointer(sdata->u.ap.beacon))
2082 drv_start_ap(local, sdata);
2083 }
2084
2085 /* fall through */
2086 case NL80211_IFTYPE_MESH_POINT:
2087 if (sdata->vif.bss_conf.enable_beacon) {
2088 changed |= BSS_CHANGED_BEACON |
2089 BSS_CHANGED_BEACON_ENABLED;
2090 ieee80211_bss_info_change_notify(sdata, changed);
2091 }
2092 break;
2093 case NL80211_IFTYPE_NAN:
2094 res = ieee80211_reconfig_nan(sdata);
2095 if (res < 0) {
2096 ieee80211_handle_reconfig_failure(local);
2097 return res;
2098 }
2099 break;
2100 case NL80211_IFTYPE_WDS:
2101 case NL80211_IFTYPE_AP_VLAN:
2102 case NL80211_IFTYPE_MONITOR:
2103 case NL80211_IFTYPE_P2P_DEVICE:
2104 /* nothing to do */
2105 break;
2106 case NL80211_IFTYPE_UNSPECIFIED:
2107 case NUM_NL80211_IFTYPES:
2108 case NL80211_IFTYPE_P2P_CLIENT:
2109 case NL80211_IFTYPE_P2P_GO:
2110 WARN_ON(1);
2111 break;
2112 }
2113 }
2114
2115 ieee80211_recalc_ps(local);
2116
2117 /*
2118 * The sta might be in psm against the ap (e.g. because
2119 * this was the state before a hw restart), so we
2120 * explicitly send a null packet in order to make sure
2121 * it'll sync against the ap (and get out of psm).
2122 */
2123 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2124 list_for_each_entry(sdata, &local->interfaces, list) {
2125 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2126 continue;
2127 if (!sdata->u.mgd.associated)
2128 continue;
2129
2130 ieee80211_send_nullfunc(local, sdata, false);
2131 }
2132 }
2133
2134 /* APs are now beaconing, add back stations */
2135 mutex_lock(&local->sta_mtx);
2136 list_for_each_entry(sta, &local->sta_list, list) {
2137 enum ieee80211_sta_state state;
2138
2139 if (!sta->uploaded)
2140 continue;
2141
2142 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2143 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2144 continue;
2145
2146 for (state = IEEE80211_STA_NOTEXIST;
2147 state < sta->sta_state; state++)
2148 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2149 state + 1));
2150 }
2151 mutex_unlock(&local->sta_mtx);
2152
2153 /* add back keys */
2154 list_for_each_entry(sdata, &local->interfaces, list)
2155 ieee80211_reset_crypto_tx_tailroom(sdata);
2156
2157 list_for_each_entry(sdata, &local->interfaces, list)
2158 if (ieee80211_sdata_running(sdata))
2159 ieee80211_enable_keys(sdata);
2160
2161 /* Reconfigure sched scan if it was interrupted by FW restart */
2162 mutex_lock(&local->mtx);
2163 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2164 lockdep_is_held(&local->mtx));
2165 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2166 lockdep_is_held(&local->mtx));
2167 if (sched_scan_sdata && sched_scan_req)
2168 /*
2169 * Sched scan stopped, but we don't want to report it. Instead,
2170 * we're trying to reschedule. However, if more than one scan
2171 * plan was set, we cannot reschedule since we don't know which
2172 * scan plan was currently running (and some scan plans may have
2173 * already finished).
2174 */
2175 if (sched_scan_req->n_scan_plans > 1 ||
2176 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2177 sched_scan_req)) {
2178 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2179 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2180 sched_scan_stopped = true;
2181 }
2182 mutex_unlock(&local->mtx);
2183
2184 if (sched_scan_stopped)
2185 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2186
2187 wake_up:
2188
2189 if (local->monitors == local->open_count && local->monitors > 0)
2190 ieee80211_add_virtual_monitor(local);
2191
2192 /*
2193 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2194 * sessions can be established after a resume.
2195 *
2196 * Also tear down aggregation sessions since reconfiguring
2197 * them in a hardware restart scenario is not easily done
2198 * right now, and the hardware will have lost information
2199 * about the sessions, but we and the AP still think they
2200 * are active. This is really a workaround though.
2201 */
2202 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2203 mutex_lock(&local->sta_mtx);
2204
2205 list_for_each_entry(sta, &local->sta_list, list) {
2206 if (!local->resuming)
2207 ieee80211_sta_tear_down_BA_sessions(
2208 sta, AGG_STOP_LOCAL_REQUEST);
2209 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2210 }
2211
2212 mutex_unlock(&local->sta_mtx);
2213 }
2214
2215 if (local->in_reconfig) {
2216 local->in_reconfig = false;
2217 barrier();
2218
2219 /* Restart deferred ROCs */
2220 mutex_lock(&local->mtx);
2221 ieee80211_start_next_roc(local);
2222 mutex_unlock(&local->mtx);
2223 }
2224
2225 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2226 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2227 false);
2228
2229 /*
2230 * If this is for hw restart things are still running.
2231 * We may want to change that later, however.
2232 */
2233 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2234 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2235
2236 if (!suspended)
2237 return 0;
2238
2239 #ifdef CONFIG_PM
2240 /* first set suspended false, then resuming */
2241 local->suspended = false;
2242 mb();
2243 local->resuming = false;
2244
2245 ieee80211_flush_completed_scan(local, false);
2246
2247 if (local->open_count && !reconfig_due_to_wowlan)
2248 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2249
2250 list_for_each_entry(sdata, &local->interfaces, list) {
2251 if (!ieee80211_sdata_running(sdata))
2252 continue;
2253 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2254 ieee80211_sta_restart(sdata);
2255 }
2256
2257 mod_timer(&local->sta_cleanup, jiffies + 1);
2258 #else
2259 WARN_ON(1);
2260 #endif
2261
2262 return 0;
2263 }
2264
ieee80211_resume_disconnect(struct ieee80211_vif * vif)2265 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2266 {
2267 struct ieee80211_sub_if_data *sdata;
2268 struct ieee80211_local *local;
2269 struct ieee80211_key *key;
2270
2271 if (WARN_ON(!vif))
2272 return;
2273
2274 sdata = vif_to_sdata(vif);
2275 local = sdata->local;
2276
2277 if (WARN_ON(!local->resuming))
2278 return;
2279
2280 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2281 return;
2282
2283 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2284
2285 mutex_lock(&local->key_mtx);
2286 list_for_each_entry(key, &sdata->key_list, list)
2287 key->flags |= KEY_FLAG_TAINTED;
2288 mutex_unlock(&local->key_mtx);
2289 }
2290 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2291
ieee80211_recalc_smps(struct ieee80211_sub_if_data * sdata)2292 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2293 {
2294 struct ieee80211_local *local = sdata->local;
2295 struct ieee80211_chanctx_conf *chanctx_conf;
2296 struct ieee80211_chanctx *chanctx;
2297
2298 mutex_lock(&local->chanctx_mtx);
2299
2300 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2301 lockdep_is_held(&local->chanctx_mtx));
2302
2303 /*
2304 * This function can be called from a work, thus it may be possible
2305 * that the chanctx_conf is removed (due to a disconnection, for
2306 * example).
2307 * So nothing should be done in such case.
2308 */
2309 if (!chanctx_conf)
2310 goto unlock;
2311
2312 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2313 ieee80211_recalc_smps_chanctx(local, chanctx);
2314 unlock:
2315 mutex_unlock(&local->chanctx_mtx);
2316 }
2317
ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data * sdata)2318 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2319 {
2320 struct ieee80211_local *local = sdata->local;
2321 struct ieee80211_chanctx_conf *chanctx_conf;
2322 struct ieee80211_chanctx *chanctx;
2323
2324 mutex_lock(&local->chanctx_mtx);
2325
2326 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2327 lockdep_is_held(&local->chanctx_mtx));
2328
2329 if (WARN_ON_ONCE(!chanctx_conf))
2330 goto unlock;
2331
2332 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2333 ieee80211_recalc_chanctx_min_def(local, chanctx);
2334 unlock:
2335 mutex_unlock(&local->chanctx_mtx);
2336 }
2337
ieee80211_ie_split_vendor(const u8 * ies,size_t ielen,size_t offset)2338 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2339 {
2340 size_t pos = offset;
2341
2342 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2343 pos += 2 + ies[pos + 1];
2344
2345 return pos;
2346 }
2347
_ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data * sdata,int rssi_min_thold,int rssi_max_thold)2348 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2349 int rssi_min_thold,
2350 int rssi_max_thold)
2351 {
2352 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2353
2354 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2355 return;
2356
2357 /*
2358 * Scale up threshold values before storing it, as the RSSI averaging
2359 * algorithm uses a scaled up value as well. Change this scaling
2360 * factor if the RSSI averaging algorithm changes.
2361 */
2362 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2363 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2364 }
2365
ieee80211_enable_rssi_reports(struct ieee80211_vif * vif,int rssi_min_thold,int rssi_max_thold)2366 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2367 int rssi_min_thold,
2368 int rssi_max_thold)
2369 {
2370 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2371
2372 WARN_ON(rssi_min_thold == rssi_max_thold ||
2373 rssi_min_thold > rssi_max_thold);
2374
2375 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2376 rssi_max_thold);
2377 }
2378 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2379
ieee80211_disable_rssi_reports(struct ieee80211_vif * vif)2380 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2381 {
2382 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2383
2384 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2385 }
2386 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2387
ieee80211_ie_build_ht_cap(u8 * pos,struct ieee80211_sta_ht_cap * ht_cap,u16 cap)2388 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2389 u16 cap)
2390 {
2391 __le16 tmp;
2392
2393 *pos++ = WLAN_EID_HT_CAPABILITY;
2394 *pos++ = sizeof(struct ieee80211_ht_cap);
2395 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2396
2397 /* capability flags */
2398 tmp = cpu_to_le16(cap);
2399 memcpy(pos, &tmp, sizeof(u16));
2400 pos += sizeof(u16);
2401
2402 /* AMPDU parameters */
2403 *pos++ = ht_cap->ampdu_factor |
2404 (ht_cap->ampdu_density <<
2405 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2406
2407 /* MCS set */
2408 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2409 pos += sizeof(ht_cap->mcs);
2410
2411 /* extended capabilities */
2412 pos += sizeof(__le16);
2413
2414 /* BF capabilities */
2415 pos += sizeof(__le32);
2416
2417 /* antenna selection */
2418 pos += sizeof(u8);
2419
2420 return pos;
2421 }
2422
ieee80211_ie_build_vht_cap(u8 * pos,struct ieee80211_sta_vht_cap * vht_cap,u32 cap)2423 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2424 u32 cap)
2425 {
2426 __le32 tmp;
2427
2428 *pos++ = WLAN_EID_VHT_CAPABILITY;
2429 *pos++ = sizeof(struct ieee80211_vht_cap);
2430 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2431
2432 /* capability flags */
2433 tmp = cpu_to_le32(cap);
2434 memcpy(pos, &tmp, sizeof(u32));
2435 pos += sizeof(u32);
2436
2437 /* VHT MCS set */
2438 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2439 pos += sizeof(vht_cap->vht_mcs);
2440
2441 return pos;
2442 }
2443
ieee80211_ie_build_he_cap(u8 * pos,const struct ieee80211_sta_he_cap * he_cap,u8 * end)2444 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2445 const struct ieee80211_sta_he_cap *he_cap,
2446 u8 *end)
2447 {
2448 u8 n;
2449 u8 ie_len;
2450 u8 *orig_pos = pos;
2451
2452 /* Make sure we have place for the IE */
2453 /*
2454 * TODO: the 1 added is because this temporarily is under the EXTENSION
2455 * IE. Get rid of it when it moves.
2456 */
2457 if (!he_cap)
2458 return orig_pos;
2459
2460 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2461 ie_len = 2 + 1 +
2462 sizeof(he_cap->he_cap_elem) + n +
2463 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2464 he_cap->he_cap_elem.phy_cap_info);
2465
2466 if ((end - pos) < ie_len)
2467 return orig_pos;
2468
2469 *pos++ = WLAN_EID_EXTENSION;
2470 pos++; /* We'll set the size later below */
2471 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2472
2473 /* Fixed data */
2474 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2475 pos += sizeof(he_cap->he_cap_elem);
2476
2477 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2478 pos += n;
2479
2480 /* Check if PPE Threshold should be present */
2481 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2482 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2483 goto end;
2484
2485 /*
2486 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2487 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2488 */
2489 n = hweight8(he_cap->ppe_thres[0] &
2490 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2491 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2492 IEEE80211_PPE_THRES_NSS_POS));
2493
2494 /*
2495 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2496 * total size.
2497 */
2498 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2499 n = DIV_ROUND_UP(n, 8);
2500
2501 /* Copy PPE Thresholds */
2502 memcpy(pos, &he_cap->ppe_thres, n);
2503 pos += n;
2504
2505 end:
2506 orig_pos[1] = (pos - orig_pos) - 2;
2507 return pos;
2508 }
2509
ieee80211_ie_build_ht_oper(u8 * pos,struct ieee80211_sta_ht_cap * ht_cap,const struct cfg80211_chan_def * chandef,u16 prot_mode,bool rifs_mode)2510 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2511 const struct cfg80211_chan_def *chandef,
2512 u16 prot_mode, bool rifs_mode)
2513 {
2514 struct ieee80211_ht_operation *ht_oper;
2515 /* Build HT Information */
2516 *pos++ = WLAN_EID_HT_OPERATION;
2517 *pos++ = sizeof(struct ieee80211_ht_operation);
2518 ht_oper = (struct ieee80211_ht_operation *)pos;
2519 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2520 chandef->chan->center_freq);
2521 switch (chandef->width) {
2522 case NL80211_CHAN_WIDTH_160:
2523 case NL80211_CHAN_WIDTH_80P80:
2524 case NL80211_CHAN_WIDTH_80:
2525 case NL80211_CHAN_WIDTH_40:
2526 if (chandef->center_freq1 > chandef->chan->center_freq)
2527 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2528 else
2529 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2530 break;
2531 default:
2532 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2533 break;
2534 }
2535 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2536 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2537 chandef->width != NL80211_CHAN_WIDTH_20)
2538 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2539
2540 if (rifs_mode)
2541 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2542
2543 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2544 ht_oper->stbc_param = 0x0000;
2545
2546 /* It seems that Basic MCS set and Supported MCS set
2547 are identical for the first 10 bytes */
2548 memset(&ht_oper->basic_set, 0, 16);
2549 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2550
2551 return pos + sizeof(struct ieee80211_ht_operation);
2552 }
2553
ieee80211_ie_build_wide_bw_cs(u8 * pos,const struct cfg80211_chan_def * chandef)2554 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2555 const struct cfg80211_chan_def *chandef)
2556 {
2557 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2558 *pos++ = 3; /* IE length */
2559 /* New channel width */
2560 switch (chandef->width) {
2561 case NL80211_CHAN_WIDTH_80:
2562 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2563 break;
2564 case NL80211_CHAN_WIDTH_160:
2565 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2566 break;
2567 case NL80211_CHAN_WIDTH_80P80:
2568 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2569 break;
2570 default:
2571 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2572 }
2573
2574 /* new center frequency segment 0 */
2575 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2576 /* new center frequency segment 1 */
2577 if (chandef->center_freq2)
2578 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2579 else
2580 *pos++ = 0;
2581 }
2582
ieee80211_ie_build_vht_oper(u8 * pos,struct ieee80211_sta_vht_cap * vht_cap,const struct cfg80211_chan_def * chandef)2583 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2584 const struct cfg80211_chan_def *chandef)
2585 {
2586 struct ieee80211_vht_operation *vht_oper;
2587
2588 *pos++ = WLAN_EID_VHT_OPERATION;
2589 *pos++ = sizeof(struct ieee80211_vht_operation);
2590 vht_oper = (struct ieee80211_vht_operation *)pos;
2591 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2592 chandef->center_freq1);
2593 if (chandef->center_freq2)
2594 vht_oper->center_freq_seg1_idx =
2595 ieee80211_frequency_to_channel(chandef->center_freq2);
2596 else
2597 vht_oper->center_freq_seg1_idx = 0x00;
2598
2599 switch (chandef->width) {
2600 case NL80211_CHAN_WIDTH_160:
2601 /*
2602 * Convert 160 MHz channel width to new style as interop
2603 * workaround.
2604 */
2605 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2606 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2607 if (chandef->chan->center_freq < chandef->center_freq1)
2608 vht_oper->center_freq_seg0_idx -= 8;
2609 else
2610 vht_oper->center_freq_seg0_idx += 8;
2611 break;
2612 case NL80211_CHAN_WIDTH_80P80:
2613 /*
2614 * Convert 80+80 MHz channel width to new style as interop
2615 * workaround.
2616 */
2617 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2618 break;
2619 case NL80211_CHAN_WIDTH_80:
2620 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2621 break;
2622 default:
2623 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2624 break;
2625 }
2626
2627 /* don't require special VHT peer rates */
2628 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2629
2630 return pos + sizeof(struct ieee80211_vht_operation);
2631 }
2632
ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation * ht_oper,struct cfg80211_chan_def * chandef)2633 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2634 struct cfg80211_chan_def *chandef)
2635 {
2636 enum nl80211_channel_type channel_type;
2637
2638 if (!ht_oper)
2639 return false;
2640
2641 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2642 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2643 channel_type = NL80211_CHAN_HT20;
2644 break;
2645 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2646 channel_type = NL80211_CHAN_HT40PLUS;
2647 break;
2648 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2649 channel_type = NL80211_CHAN_HT40MINUS;
2650 break;
2651 default:
2652 channel_type = NL80211_CHAN_NO_HT;
2653 return false;
2654 }
2655
2656 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2657 return true;
2658 }
2659
ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation * oper,struct cfg80211_chan_def * chandef)2660 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2661 struct cfg80211_chan_def *chandef)
2662 {
2663 struct cfg80211_chan_def new = *chandef;
2664 int cf1, cf2;
2665
2666 if (!oper)
2667 return false;
2668
2669 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2670 chandef->chan->band);
2671 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2672 chandef->chan->band);
2673
2674 switch (oper->chan_width) {
2675 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2676 break;
2677 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2678 new.width = NL80211_CHAN_WIDTH_80;
2679 new.center_freq1 = cf1;
2680 /* If needed, adjust based on the newer interop workaround. */
2681 if (oper->center_freq_seg1_idx) {
2682 unsigned int diff;
2683
2684 diff = abs(oper->center_freq_seg1_idx -
2685 oper->center_freq_seg0_idx);
2686 if (diff == 8) {
2687 new.width = NL80211_CHAN_WIDTH_160;
2688 new.center_freq1 = cf2;
2689 } else if (diff > 8) {
2690 new.width = NL80211_CHAN_WIDTH_80P80;
2691 new.center_freq2 = cf2;
2692 }
2693 }
2694 break;
2695 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2696 new.width = NL80211_CHAN_WIDTH_160;
2697 new.center_freq1 = cf1;
2698 break;
2699 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2700 new.width = NL80211_CHAN_WIDTH_80P80;
2701 new.center_freq1 = cf1;
2702 new.center_freq2 = cf2;
2703 break;
2704 default:
2705 return false;
2706 }
2707
2708 if (!cfg80211_chandef_valid(&new))
2709 return false;
2710
2711 *chandef = new;
2712 return true;
2713 }
2714
ieee80211_parse_bitrates(struct cfg80211_chan_def * chandef,const struct ieee80211_supported_band * sband,const u8 * srates,int srates_len,u32 * rates)2715 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2716 const struct ieee80211_supported_band *sband,
2717 const u8 *srates, int srates_len, u32 *rates)
2718 {
2719 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2720 int shift = ieee80211_chandef_get_shift(chandef);
2721 struct ieee80211_rate *br;
2722 int brate, rate, i, j, count = 0;
2723
2724 *rates = 0;
2725
2726 for (i = 0; i < srates_len; i++) {
2727 rate = srates[i] & 0x7f;
2728
2729 for (j = 0; j < sband->n_bitrates; j++) {
2730 br = &sband->bitrates[j];
2731 if ((rate_flags & br->flags) != rate_flags)
2732 continue;
2733
2734 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2735 if (brate == rate) {
2736 *rates |= BIT(j);
2737 count++;
2738 break;
2739 }
2740 }
2741 }
2742 return count;
2743 }
2744
ieee80211_add_srates_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,bool need_basic,enum nl80211_band band)2745 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2746 struct sk_buff *skb, bool need_basic,
2747 enum nl80211_band band)
2748 {
2749 struct ieee80211_local *local = sdata->local;
2750 struct ieee80211_supported_band *sband;
2751 int rate, shift;
2752 u8 i, rates, *pos;
2753 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2754 u32 rate_flags;
2755
2756 shift = ieee80211_vif_get_shift(&sdata->vif);
2757 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2758 sband = local->hw.wiphy->bands[band];
2759 rates = 0;
2760 for (i = 0; i < sband->n_bitrates; i++) {
2761 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2762 continue;
2763 rates++;
2764 }
2765 if (rates > 8)
2766 rates = 8;
2767
2768 if (skb_tailroom(skb) < rates + 2)
2769 return -ENOMEM;
2770
2771 pos = skb_put(skb, rates + 2);
2772 *pos++ = WLAN_EID_SUPP_RATES;
2773 *pos++ = rates;
2774 for (i = 0; i < rates; i++) {
2775 u8 basic = 0;
2776 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2777 continue;
2778
2779 if (need_basic && basic_rates & BIT(i))
2780 basic = 0x80;
2781 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2782 5 * (1 << shift));
2783 *pos++ = basic | (u8) rate;
2784 }
2785
2786 return 0;
2787 }
2788
ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,bool need_basic,enum nl80211_band band)2789 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2790 struct sk_buff *skb, bool need_basic,
2791 enum nl80211_band band)
2792 {
2793 struct ieee80211_local *local = sdata->local;
2794 struct ieee80211_supported_band *sband;
2795 int rate, shift;
2796 u8 i, exrates, *pos;
2797 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2798 u32 rate_flags;
2799
2800 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2801 shift = ieee80211_vif_get_shift(&sdata->vif);
2802
2803 sband = local->hw.wiphy->bands[band];
2804 exrates = 0;
2805 for (i = 0; i < sband->n_bitrates; i++) {
2806 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2807 continue;
2808 exrates++;
2809 }
2810
2811 if (exrates > 8)
2812 exrates -= 8;
2813 else
2814 exrates = 0;
2815
2816 if (skb_tailroom(skb) < exrates + 2)
2817 return -ENOMEM;
2818
2819 if (exrates) {
2820 pos = skb_put(skb, exrates + 2);
2821 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2822 *pos++ = exrates;
2823 for (i = 8; i < sband->n_bitrates; i++) {
2824 u8 basic = 0;
2825 if ((rate_flags & sband->bitrates[i].flags)
2826 != rate_flags)
2827 continue;
2828 if (need_basic && basic_rates & BIT(i))
2829 basic = 0x80;
2830 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2831 5 * (1 << shift));
2832 *pos++ = basic | (u8) rate;
2833 }
2834 }
2835 return 0;
2836 }
2837
ieee80211_ave_rssi(struct ieee80211_vif * vif)2838 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2839 {
2840 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2842
2843 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2844 /* non-managed type inferfaces */
2845 return 0;
2846 }
2847 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2848 }
2849 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2850
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info * mcs)2851 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2852 {
2853 if (!mcs)
2854 return 1;
2855
2856 /* TODO: consider rx_highest */
2857
2858 if (mcs->rx_mask[3])
2859 return 4;
2860 if (mcs->rx_mask[2])
2861 return 3;
2862 if (mcs->rx_mask[1])
2863 return 2;
2864 return 1;
2865 }
2866
2867 /**
2868 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2869 * @local: mac80211 hw info struct
2870 * @status: RX status
2871 * @mpdu_len: total MPDU length (including FCS)
2872 * @mpdu_offset: offset into MPDU to calculate timestamp at
2873 *
2874 * This function calculates the RX timestamp at the given MPDU offset, taking
2875 * into account what the RX timestamp was. An offset of 0 will just normalize
2876 * the timestamp to TSF at beginning of MPDU reception.
2877 */
ieee80211_calculate_rx_timestamp(struct ieee80211_local * local,struct ieee80211_rx_status * status,unsigned int mpdu_len,unsigned int mpdu_offset)2878 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2879 struct ieee80211_rx_status *status,
2880 unsigned int mpdu_len,
2881 unsigned int mpdu_offset)
2882 {
2883 u64 ts = status->mactime;
2884 struct rate_info ri;
2885 u16 rate;
2886
2887 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2888 return 0;
2889
2890 memset(&ri, 0, sizeof(ri));
2891
2892 ri.bw = status->bw;
2893
2894 /* Fill cfg80211 rate info */
2895 switch (status->encoding) {
2896 case RX_ENC_HT:
2897 ri.mcs = status->rate_idx;
2898 ri.flags |= RATE_INFO_FLAGS_MCS;
2899 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2900 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2901 break;
2902 case RX_ENC_VHT:
2903 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2904 ri.mcs = status->rate_idx;
2905 ri.nss = status->nss;
2906 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2907 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2908 break;
2909 default:
2910 WARN_ON(1);
2911 /* fall through */
2912 case RX_ENC_LEGACY: {
2913 struct ieee80211_supported_band *sband;
2914 int shift = 0;
2915 int bitrate;
2916
2917 switch (status->bw) {
2918 case RATE_INFO_BW_10:
2919 shift = 1;
2920 break;
2921 case RATE_INFO_BW_5:
2922 shift = 2;
2923 break;
2924 }
2925
2926 sband = local->hw.wiphy->bands[status->band];
2927 bitrate = sband->bitrates[status->rate_idx].bitrate;
2928 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2929
2930 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2931 /* TODO: handle HT/VHT preambles */
2932 if (status->band == NL80211_BAND_5GHZ) {
2933 ts += 20 << shift;
2934 mpdu_offset += 2;
2935 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2936 ts += 96;
2937 } else {
2938 ts += 192;
2939 }
2940 }
2941 break;
2942 }
2943 }
2944
2945 rate = cfg80211_calculate_bitrate(&ri);
2946 if (WARN_ONCE(!rate,
2947 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2948 (unsigned long long)status->flag, status->rate_idx,
2949 status->nss))
2950 return 0;
2951
2952 /* rewind from end of MPDU */
2953 if (status->flag & RX_FLAG_MACTIME_END)
2954 ts -= mpdu_len * 8 * 10 / rate;
2955
2956 ts += mpdu_offset * 8 * 10 / rate;
2957
2958 return ts;
2959 }
2960
ieee80211_dfs_cac_cancel(struct ieee80211_local * local)2961 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2962 {
2963 struct ieee80211_sub_if_data *sdata;
2964 struct cfg80211_chan_def chandef;
2965
2966 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2967 ASSERT_RTNL();
2968
2969 mutex_lock(&local->mtx);
2970 list_for_each_entry(sdata, &local->interfaces, list) {
2971 /* it might be waiting for the local->mtx, but then
2972 * by the time it gets it, sdata->wdev.cac_started
2973 * will no longer be true
2974 */
2975 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2976
2977 if (sdata->wdev.cac_started) {
2978 chandef = sdata->vif.bss_conf.chandef;
2979 ieee80211_vif_release_channel(sdata);
2980 cfg80211_cac_event(sdata->dev,
2981 &chandef,
2982 NL80211_RADAR_CAC_ABORTED,
2983 GFP_KERNEL);
2984 }
2985 }
2986 mutex_unlock(&local->mtx);
2987 }
2988
ieee80211_dfs_radar_detected_work(struct work_struct * work)2989 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2990 {
2991 struct ieee80211_local *local =
2992 container_of(work, struct ieee80211_local, radar_detected_work);
2993 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2994 struct ieee80211_chanctx *ctx;
2995 int num_chanctx = 0;
2996
2997 mutex_lock(&local->chanctx_mtx);
2998 list_for_each_entry(ctx, &local->chanctx_list, list) {
2999 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3000 continue;
3001
3002 num_chanctx++;
3003 chandef = ctx->conf.def;
3004 }
3005 mutex_unlock(&local->chanctx_mtx);
3006
3007 rtnl_lock();
3008 ieee80211_dfs_cac_cancel(local);
3009 rtnl_unlock();
3010
3011 if (num_chanctx > 1)
3012 /* XXX: multi-channel is not supported yet */
3013 WARN_ON(1);
3014 else
3015 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3016 }
3017
ieee80211_radar_detected(struct ieee80211_hw * hw)3018 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3019 {
3020 struct ieee80211_local *local = hw_to_local(hw);
3021
3022 trace_api_radar_detected(local);
3023
3024 schedule_work(&local->radar_detected_work);
3025 }
3026 EXPORT_SYMBOL(ieee80211_radar_detected);
3027
ieee80211_chandef_downgrade(struct cfg80211_chan_def * c)3028 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3029 {
3030 u32 ret;
3031 int tmp;
3032
3033 switch (c->width) {
3034 case NL80211_CHAN_WIDTH_20:
3035 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3036 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3037 break;
3038 case NL80211_CHAN_WIDTH_40:
3039 c->width = NL80211_CHAN_WIDTH_20;
3040 c->center_freq1 = c->chan->center_freq;
3041 ret = IEEE80211_STA_DISABLE_40MHZ |
3042 IEEE80211_STA_DISABLE_VHT;
3043 break;
3044 case NL80211_CHAN_WIDTH_80:
3045 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3046 /* n_P40 */
3047 tmp /= 2;
3048 /* freq_P40 */
3049 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3050 c->width = NL80211_CHAN_WIDTH_40;
3051 ret = IEEE80211_STA_DISABLE_VHT;
3052 break;
3053 case NL80211_CHAN_WIDTH_80P80:
3054 c->center_freq2 = 0;
3055 c->width = NL80211_CHAN_WIDTH_80;
3056 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3057 IEEE80211_STA_DISABLE_160MHZ;
3058 break;
3059 case NL80211_CHAN_WIDTH_160:
3060 /* n_P20 */
3061 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3062 /* n_P80 */
3063 tmp /= 4;
3064 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3065 c->width = NL80211_CHAN_WIDTH_80;
3066 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3067 IEEE80211_STA_DISABLE_160MHZ;
3068 break;
3069 default:
3070 case NL80211_CHAN_WIDTH_20_NOHT:
3071 WARN_ON_ONCE(1);
3072 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3073 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3074 break;
3075 case NL80211_CHAN_WIDTH_5:
3076 case NL80211_CHAN_WIDTH_10:
3077 WARN_ON_ONCE(1);
3078 /* keep c->width */
3079 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3080 break;
3081 }
3082
3083 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3084
3085 return ret;
3086 }
3087
3088 /*
3089 * Returns true if smps_mode_new is strictly more restrictive than
3090 * smps_mode_old.
3091 */
ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,enum ieee80211_smps_mode smps_mode_new)3092 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3093 enum ieee80211_smps_mode smps_mode_new)
3094 {
3095 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3096 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3097 return false;
3098
3099 switch (smps_mode_old) {
3100 case IEEE80211_SMPS_STATIC:
3101 return false;
3102 case IEEE80211_SMPS_DYNAMIC:
3103 return smps_mode_new == IEEE80211_SMPS_STATIC;
3104 case IEEE80211_SMPS_OFF:
3105 return smps_mode_new != IEEE80211_SMPS_OFF;
3106 default:
3107 WARN_ON(1);
3108 }
3109
3110 return false;
3111 }
3112
ieee80211_send_action_csa(struct ieee80211_sub_if_data * sdata,struct cfg80211_csa_settings * csa_settings)3113 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3114 struct cfg80211_csa_settings *csa_settings)
3115 {
3116 struct sk_buff *skb;
3117 struct ieee80211_mgmt *mgmt;
3118 struct ieee80211_local *local = sdata->local;
3119 int freq;
3120 int hdr_len = offsetofend(struct ieee80211_mgmt,
3121 u.action.u.chan_switch);
3122 u8 *pos;
3123
3124 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3125 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3126 return -EOPNOTSUPP;
3127
3128 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3129 5 + /* channel switch announcement element */
3130 3 + /* secondary channel offset element */
3131 5 + /* wide bandwidth channel switch announcement */
3132 8); /* mesh channel switch parameters element */
3133 if (!skb)
3134 return -ENOMEM;
3135
3136 skb_reserve(skb, local->tx_headroom);
3137 mgmt = skb_put_zero(skb, hdr_len);
3138 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3139 IEEE80211_STYPE_ACTION);
3140
3141 eth_broadcast_addr(mgmt->da);
3142 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3143 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3144 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3145 } else {
3146 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3147 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3148 }
3149 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3150 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3151 pos = skb_put(skb, 5);
3152 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3153 *pos++ = 3; /* IE length */
3154 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3155 freq = csa_settings->chandef.chan->center_freq;
3156 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3157 *pos++ = csa_settings->count; /* count */
3158
3159 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3160 enum nl80211_channel_type ch_type;
3161
3162 skb_put(skb, 3);
3163 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3164 *pos++ = 1; /* IE length */
3165 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3166 if (ch_type == NL80211_CHAN_HT40PLUS)
3167 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3168 else
3169 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3170 }
3171
3172 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3173 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3174
3175 skb_put(skb, 8);
3176 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3177 *pos++ = 6; /* IE length */
3178 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3179 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3180 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3181 *pos++ |= csa_settings->block_tx ?
3182 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3183 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3184 pos += 2;
3185 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3186 pos += 2;
3187 }
3188
3189 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3190 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3191 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3192 skb_put(skb, 5);
3193 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3194 }
3195
3196 ieee80211_tx_skb(sdata, skb);
3197 return 0;
3198 }
3199
ieee80211_cs_valid(const struct ieee80211_cipher_scheme * cs)3200 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3201 {
3202 return !(cs == NULL || cs->cipher == 0 ||
3203 cs->hdr_len < cs->pn_len + cs->pn_off ||
3204 cs->hdr_len <= cs->key_idx_off ||
3205 cs->key_idx_shift > 7 ||
3206 cs->key_idx_mask == 0);
3207 }
3208
ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme * cs,int n)3209 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3210 {
3211 int i;
3212
3213 /* Ensure we have enough iftype bitmap space for all iftype values */
3214 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3215
3216 for (i = 0; i < n; i++)
3217 if (!ieee80211_cs_valid(&cs[i]))
3218 return false;
3219
3220 return true;
3221 }
3222
3223 const struct ieee80211_cipher_scheme *
ieee80211_cs_get(struct ieee80211_local * local,u32 cipher,enum nl80211_iftype iftype)3224 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3225 enum nl80211_iftype iftype)
3226 {
3227 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3228 int n = local->hw.n_cipher_schemes;
3229 int i;
3230 const struct ieee80211_cipher_scheme *cs = NULL;
3231
3232 for (i = 0; i < n; i++) {
3233 if (l[i].cipher == cipher) {
3234 cs = &l[i];
3235 break;
3236 }
3237 }
3238
3239 if (!cs || !(cs->iftype & BIT(iftype)))
3240 return NULL;
3241
3242 return cs;
3243 }
3244
ieee80211_cs_headroom(struct ieee80211_local * local,struct cfg80211_crypto_settings * crypto,enum nl80211_iftype iftype)3245 int ieee80211_cs_headroom(struct ieee80211_local *local,
3246 struct cfg80211_crypto_settings *crypto,
3247 enum nl80211_iftype iftype)
3248 {
3249 const struct ieee80211_cipher_scheme *cs;
3250 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3251 int i;
3252
3253 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3254 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3255 iftype);
3256
3257 if (cs && headroom < cs->hdr_len)
3258 headroom = cs->hdr_len;
3259 }
3260
3261 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3262 if (cs && headroom < cs->hdr_len)
3263 headroom = cs->hdr_len;
3264
3265 return headroom;
3266 }
3267
3268 static bool
ieee80211_extend_noa_desc(struct ieee80211_noa_data * data,u32 tsf,int i)3269 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3270 {
3271 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3272 int skip;
3273
3274 if (end > 0)
3275 return false;
3276
3277 /* One shot NOA */
3278 if (data->count[i] == 1)
3279 return false;
3280
3281 if (data->desc[i].interval == 0)
3282 return false;
3283
3284 /* End time is in the past, check for repetitions */
3285 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3286 if (data->count[i] < 255) {
3287 if (data->count[i] <= skip) {
3288 data->count[i] = 0;
3289 return false;
3290 }
3291
3292 data->count[i] -= skip;
3293 }
3294
3295 data->desc[i].start += skip * data->desc[i].interval;
3296
3297 return true;
3298 }
3299
3300 static bool
ieee80211_extend_absent_time(struct ieee80211_noa_data * data,u32 tsf,s32 * offset)3301 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3302 s32 *offset)
3303 {
3304 bool ret = false;
3305 int i;
3306
3307 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3308 s32 cur;
3309
3310 if (!data->count[i])
3311 continue;
3312
3313 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3314 ret = true;
3315
3316 cur = data->desc[i].start - tsf;
3317 if (cur > *offset)
3318 continue;
3319
3320 cur = data->desc[i].start + data->desc[i].duration - tsf;
3321 if (cur > *offset)
3322 *offset = cur;
3323 }
3324
3325 return ret;
3326 }
3327
3328 static u32
ieee80211_get_noa_absent_time(struct ieee80211_noa_data * data,u32 tsf)3329 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3330 {
3331 s32 offset = 0;
3332 int tries = 0;
3333 /*
3334 * arbitrary limit, used to avoid infinite loops when combined NoA
3335 * descriptors cover the full time period.
3336 */
3337 int max_tries = 5;
3338
3339 ieee80211_extend_absent_time(data, tsf, &offset);
3340 do {
3341 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3342 break;
3343
3344 tries++;
3345 } while (tries < max_tries);
3346
3347 return offset;
3348 }
3349
ieee80211_update_p2p_noa(struct ieee80211_noa_data * data,u32 tsf)3350 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3351 {
3352 u32 next_offset = BIT(31) - 1;
3353 int i;
3354
3355 data->absent = 0;
3356 data->has_next_tsf = false;
3357 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3358 s32 start;
3359
3360 if (!data->count[i])
3361 continue;
3362
3363 ieee80211_extend_noa_desc(data, tsf, i);
3364 start = data->desc[i].start - tsf;
3365 if (start <= 0)
3366 data->absent |= BIT(i);
3367
3368 if (next_offset > start)
3369 next_offset = start;
3370
3371 data->has_next_tsf = true;
3372 }
3373
3374 if (data->absent)
3375 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3376
3377 data->next_tsf = tsf + next_offset;
3378 }
3379 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3380
ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr * attr,struct ieee80211_noa_data * data,u32 tsf)3381 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3382 struct ieee80211_noa_data *data, u32 tsf)
3383 {
3384 int ret = 0;
3385 int i;
3386
3387 memset(data, 0, sizeof(*data));
3388
3389 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3390 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3391
3392 if (!desc->count || !desc->duration)
3393 continue;
3394
3395 data->count[i] = desc->count;
3396 data->desc[i].start = le32_to_cpu(desc->start_time);
3397 data->desc[i].duration = le32_to_cpu(desc->duration);
3398 data->desc[i].interval = le32_to_cpu(desc->interval);
3399
3400 if (data->count[i] > 1 &&
3401 data->desc[i].interval < data->desc[i].duration)
3402 continue;
3403
3404 ieee80211_extend_noa_desc(data, tsf, i);
3405 ret++;
3406 }
3407
3408 if (ret)
3409 ieee80211_update_p2p_noa(data, tsf);
3410
3411 return ret;
3412 }
3413 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3414
ieee80211_recalc_dtim(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)3415 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3416 struct ieee80211_sub_if_data *sdata)
3417 {
3418 u64 tsf = drv_get_tsf(local, sdata);
3419 u64 dtim_count = 0;
3420 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3421 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3422 struct ps_data *ps;
3423 u8 bcns_from_dtim;
3424
3425 if (tsf == -1ULL || !beacon_int || !dtim_period)
3426 return;
3427
3428 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3429 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3430 if (!sdata->bss)
3431 return;
3432
3433 ps = &sdata->bss->ps;
3434 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3435 ps = &sdata->u.mesh.ps;
3436 } else {
3437 return;
3438 }
3439
3440 /*
3441 * actually finds last dtim_count, mac80211 will update in
3442 * __beacon_add_tim().
3443 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3444 */
3445 do_div(tsf, beacon_int);
3446 bcns_from_dtim = do_div(tsf, dtim_period);
3447 /* just had a DTIM */
3448 if (!bcns_from_dtim)
3449 dtim_count = 0;
3450 else
3451 dtim_count = dtim_period - bcns_from_dtim;
3452
3453 ps->dtim_count = dtim_count;
3454 }
3455
ieee80211_chanctx_radar_detect(struct ieee80211_local * local,struct ieee80211_chanctx * ctx)3456 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3457 struct ieee80211_chanctx *ctx)
3458 {
3459 struct ieee80211_sub_if_data *sdata;
3460 u8 radar_detect = 0;
3461
3462 lockdep_assert_held(&local->chanctx_mtx);
3463
3464 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3465 return 0;
3466
3467 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3468 if (sdata->reserved_radar_required)
3469 radar_detect |= BIT(sdata->reserved_chandef.width);
3470
3471 /*
3472 * An in-place reservation context should not have any assigned vifs
3473 * until it replaces the other context.
3474 */
3475 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3476 !list_empty(&ctx->assigned_vifs));
3477
3478 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3479 if (sdata->radar_required)
3480 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3481
3482 return radar_detect;
3483 }
3484
ieee80211_check_combinations(struct ieee80211_sub_if_data * sdata,const struct cfg80211_chan_def * chandef,enum ieee80211_chanctx_mode chanmode,u8 radar_detect)3485 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3486 const struct cfg80211_chan_def *chandef,
3487 enum ieee80211_chanctx_mode chanmode,
3488 u8 radar_detect)
3489 {
3490 struct ieee80211_local *local = sdata->local;
3491 struct ieee80211_sub_if_data *sdata_iter;
3492 enum nl80211_iftype iftype = sdata->wdev.iftype;
3493 struct ieee80211_chanctx *ctx;
3494 int total = 1;
3495 struct iface_combination_params params = {
3496 .radar_detect = radar_detect,
3497 };
3498
3499 lockdep_assert_held(&local->chanctx_mtx);
3500
3501 if (WARN_ON(hweight32(radar_detect) > 1))
3502 return -EINVAL;
3503
3504 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3505 !chandef->chan))
3506 return -EINVAL;
3507
3508 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3509 return -EINVAL;
3510
3511 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3512 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3513 /*
3514 * always passing this is harmless, since it'll be the
3515 * same value that cfg80211 finds if it finds the same
3516 * interface ... and that's always allowed
3517 */
3518 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3519 }
3520
3521 /* Always allow software iftypes */
3522 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3523 if (radar_detect)
3524 return -EINVAL;
3525 return 0;
3526 }
3527
3528 if (chandef)
3529 params.num_different_channels = 1;
3530
3531 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3532 params.iftype_num[iftype] = 1;
3533
3534 list_for_each_entry(ctx, &local->chanctx_list, list) {
3535 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3536 continue;
3537 params.radar_detect |=
3538 ieee80211_chanctx_radar_detect(local, ctx);
3539 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3540 params.num_different_channels++;
3541 continue;
3542 }
3543 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3544 cfg80211_chandef_compatible(chandef,
3545 &ctx->conf.def))
3546 continue;
3547 params.num_different_channels++;
3548 }
3549
3550 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3551 struct wireless_dev *wdev_iter;
3552
3553 wdev_iter = &sdata_iter->wdev;
3554
3555 if (sdata_iter == sdata ||
3556 !ieee80211_sdata_running(sdata_iter) ||
3557 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3558 continue;
3559
3560 params.iftype_num[wdev_iter->iftype]++;
3561 total++;
3562 }
3563
3564 if (total == 1 && !params.radar_detect)
3565 return 0;
3566
3567 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3568 }
3569
3570 static void
ieee80211_iter_max_chans(const struct ieee80211_iface_combination * c,void * data)3571 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3572 void *data)
3573 {
3574 u32 *max_num_different_channels = data;
3575
3576 *max_num_different_channels = max(*max_num_different_channels,
3577 c->num_different_channels);
3578 }
3579
ieee80211_max_num_channels(struct ieee80211_local * local)3580 int ieee80211_max_num_channels(struct ieee80211_local *local)
3581 {
3582 struct ieee80211_sub_if_data *sdata;
3583 struct ieee80211_chanctx *ctx;
3584 u32 max_num_different_channels = 1;
3585 int err;
3586 struct iface_combination_params params = {0};
3587
3588 lockdep_assert_held(&local->chanctx_mtx);
3589
3590 list_for_each_entry(ctx, &local->chanctx_list, list) {
3591 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3592 continue;
3593
3594 params.num_different_channels++;
3595
3596 params.radar_detect |=
3597 ieee80211_chanctx_radar_detect(local, ctx);
3598 }
3599
3600 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3601 params.iftype_num[sdata->wdev.iftype]++;
3602
3603 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3604 ieee80211_iter_max_chans,
3605 &max_num_different_channels);
3606 if (err < 0)
3607 return err;
3608
3609 return max_num_different_channels;
3610 }
3611
ieee80211_add_wmm_info_ie(u8 * buf,u8 qosinfo)3612 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3613 {
3614 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3615 *buf++ = 7; /* len */
3616 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3617 *buf++ = 0x50;
3618 *buf++ = 0xf2;
3619 *buf++ = 2; /* WME */
3620 *buf++ = 0; /* WME info */
3621 *buf++ = 1; /* WME ver */
3622 *buf++ = qosinfo; /* U-APSD no in use */
3623
3624 return buf;
3625 }
3626
ieee80211_txq_get_depth(struct ieee80211_txq * txq,unsigned long * frame_cnt,unsigned long * byte_cnt)3627 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3628 unsigned long *frame_cnt,
3629 unsigned long *byte_cnt)
3630 {
3631 struct txq_info *txqi = to_txq_info(txq);
3632 u32 frag_cnt = 0, frag_bytes = 0;
3633 struct sk_buff *skb;
3634
3635 skb_queue_walk(&txqi->frags, skb) {
3636 frag_cnt++;
3637 frag_bytes += skb->len;
3638 }
3639
3640 if (frame_cnt)
3641 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3642
3643 if (byte_cnt)
3644 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3645 }
3646 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3647
3648 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3649 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3650 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3651 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3652 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3653 };
3654
