?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
drm/i915: fix port checks for MST support on gen >= 11
[linux/fpc-iii.git] / net / mac80211 / util.c
blob7fa9871b1db9fe325dea47bc81a15418ea1cbb81
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2019 Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * utilities for mac80211
15 */
16
17 #include <net/mac80211.h>
18 #include <linux/netdevice.h>
19 #include <linux/export.h>
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/bitmap.h>
26 #include <linux/crc32.h>
27 #include <net/net_namespace.h>
28 #include <net/cfg80211.h>
29 #include <net/rtnetlink.h>
30
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
33 #include "rate.h"
34 #include "mesh.h"
35 #include "wme.h"
36 #include "led.h"
37 #include "wep.h"
38
39 /* privid for wiphys to determine whether they belong to us or not */
40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41
42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43 {
44 struct ieee80211_local *local;
45 BUG_ON(!wiphy);
46
47 local = wiphy_priv(wiphy);
48 return &local->hw;
49 }
50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51
52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
53 {
54 struct sk_buff *skb;
55 struct ieee80211_hdr *hdr;
56
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
60 }
61 }
62
63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
65 int shift)
66 {
67 int dur;
68
69 /* calculate duration (in microseconds, rounded up to next higher
70 * integer if it includes a fractional microsecond) to send frame of
71 * len bytes (does not include FCS) at the given rate. Duration will
72 * also include SIFS.
73 *
74 * rate is in 100 kbps, so divident is multiplied by 10 in the
75 * DIV_ROUND_UP() operations.
76 *
77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
78 * is assumed to be 0 otherwise.
79 */
80
81 if (band == NL80211_BAND_5GHZ || erp) {
82 /*
83 * OFDM:
84 *
85 * N_DBPS = DATARATE x 4
86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
87 * (16 = SIGNAL time, 6 = tail bits)
88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
89 *
90 * T_SYM = 4 usec
91 * 802.11a - 18.5.2: aSIFSTime = 16 usec
92 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
93 * signal ext = 6 usec
94 */
95 dur = 16; /* SIFS + signal ext */
96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98
99 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 4 for 5 MHz
101 * * times 2 for 10 MHz
102 */
103 dur *= 1 << shift;
104
105 /* rates should already consider the channel bandwidth,
106 * don't apply divisor again.
107 */
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate); /* T_SYM x N_SYM */
110 } else {
111 /*
112 * 802.11b or 802.11g with 802.11b compatibility:
113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 *
116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117 * aSIFSTime = 10 usec
118 * aPreambleLength = 144 usec or 72 usec with short preamble
119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 */
121 dur = 10; /* aSIFSTime = 10 usec */
122 dur += short_preamble ? (72 + 24) : (144 + 48);
123
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
125 }
126
127 return dur;
128 }
129
130 /* Exported duration function for driver use */
131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
134 size_t frame_len,
135 struct ieee80211_rate *rate)
136 {
137 struct ieee80211_sub_if_data *sdata;
138 u16 dur;
139 int erp, shift = 0;
140 bool short_preamble = false;
141
142 erp = 0;
143 if (vif) {
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
149 }
150
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
153
154 return cpu_to_le16(dur);
155 }
156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157
158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
161 {
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
165 bool short_preamble;
166 int erp, shift = 0, bitrate;
167 u16 dur;
168 struct ieee80211_supported_band *sband;
169
170 sband = local->hw.wiphy->bands[frame_txctl->band];
171
172 short_preamble = false;
173
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
175
176 erp = 0;
177 if (vif) {
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
183 }
184
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
186
187 /* CTS duration */
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190 /* Data frame duration */
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
193 /* ACK duration */
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
196
197 return cpu_to_le16(dur);
198 }
199 EXPORT_SYMBOL(ieee80211_rts_duration);
200
201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
203 size_t frame_len,
204 const struct ieee80211_tx_info *frame_txctl)
205 {
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
209 bool short_preamble;
210 int erp, shift = 0, bitrate;
211 u16 dur;
212 struct ieee80211_supported_band *sband;
213
214 sband = local->hw.wiphy->bands[frame_txctl->band];
215
216 short_preamble = false;
217
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
219 erp = 0;
220 if (vif) {
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
226 }
227
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229
230 /* Data frame duration */
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234 /* ACK duration */
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 }
238
239 return cpu_to_le16(dur);
240 }
241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242
243 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
244 {
245 struct ieee80211_sub_if_data *sdata;
246 int n_acs = IEEE80211_NUM_ACS;
247
248 if (local->ops->wake_tx_queue)
249 return;
250
251 if (local->hw.queues < IEEE80211_NUM_ACS)
252 n_acs = 1;
253
254 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
255 int ac;
256
257 if (!sdata->dev)
258 continue;
259
260 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
261 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
262 continue;
263
264 for (ac = 0; ac < n_acs; ac++) {
265 int ac_queue = sdata->vif.hw_queue[ac];
266
267 if (ac_queue == queue ||
268 (sdata->vif.cab_queue == queue &&
269 local->queue_stop_reasons[ac_queue] == 0 &&
270 skb_queue_empty(&local->pending[ac_queue])))
271 netif_wake_subqueue(sdata->dev, ac);
272 }
273 }
274 }
275
276 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
277 enum queue_stop_reason reason,
278 bool refcounted)
279 {
280 struct ieee80211_local *local = hw_to_local(hw);
281
282 trace_wake_queue(local, queue, reason);
283
284 if (WARN_ON(queue >= hw->queues))
285 return;
286
287 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
288 return;
289
290 if (!refcounted) {
291 local->q_stop_reasons[queue][reason] = 0;
292 } else {
293 local->q_stop_reasons[queue][reason]--;
294 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
295 local->q_stop_reasons[queue][reason] = 0;
296 }
297
298 if (local->q_stop_reasons[queue][reason] == 0)
299 __clear_bit(reason, &local->queue_stop_reasons[queue]);
300
301 if (local->queue_stop_reasons[queue] != 0)
302 /* someone still has this queue stopped */
303 return;
304
305 if (skb_queue_empty(&local->pending[queue])) {
306 rcu_read_lock();
307 ieee80211_propagate_queue_wake(local, queue);
308 rcu_read_unlock();
309 } else
310 tasklet_schedule(&local->tx_pending_tasklet);
311 }
312
313 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
314 enum queue_stop_reason reason,
315 bool refcounted)
316 {
317 struct ieee80211_local *local = hw_to_local(hw);
318 unsigned long flags;
319
320 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
321 __ieee80211_wake_queue(hw, queue, reason, refcounted);
322 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
323 }
324
325 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
326 {
327 ieee80211_wake_queue_by_reason(hw, queue,
328 IEEE80211_QUEUE_STOP_REASON_DRIVER,
329 false);
330 }
331 EXPORT_SYMBOL(ieee80211_wake_queue);
332
333 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason,
335 bool refcounted)
336 {
337 struct ieee80211_local *local = hw_to_local(hw);
338 struct ieee80211_sub_if_data *sdata;
339 int n_acs = IEEE80211_NUM_ACS;
340
341 trace_stop_queue(local, queue, reason);
342
343 if (WARN_ON(queue >= hw->queues))
344 return;
345
346 if (!refcounted)
347 local->q_stop_reasons[queue][reason] = 1;
348 else
349 local->q_stop_reasons[queue][reason]++;
350
351 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
352 return;
353
354 if (local->ops->wake_tx_queue)
355 return;
356
357 if (local->hw.queues < IEEE80211_NUM_ACS)
358 n_acs = 1;
359
360 rcu_read_lock();
361 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
362 int ac;
363
364 if (!sdata->dev)
365 continue;
366
367 for (ac = 0; ac < n_acs; ac++) {
368 if (sdata->vif.hw_queue[ac] == queue ||
369 sdata->vif.cab_queue == queue)
370 netif_stop_subqueue(sdata->dev, ac);
371 }
372 }
373 rcu_read_unlock();
374 }
375
376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
377 enum queue_stop_reason reason,
378 bool refcounted)
379 {
380 struct ieee80211_local *local = hw_to_local(hw);
381 unsigned long flags;
382
383 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
384 __ieee80211_stop_queue(hw, queue, reason, refcounted);
385 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
386 }
387
388 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
389 {
390 ieee80211_stop_queue_by_reason(hw, queue,
391 IEEE80211_QUEUE_STOP_REASON_DRIVER,
392 false);
393 }
394 EXPORT_SYMBOL(ieee80211_stop_queue);
395
396 void ieee80211_add_pending_skb(struct ieee80211_local *local,
397 struct sk_buff *skb)
398 {
399 struct ieee80211_hw *hw = &local->hw;
400 unsigned long flags;
401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
402 int queue = info->hw_queue;
403
404 if (WARN_ON(!info->control.vif)) {
405 ieee80211_free_txskb(&local->hw, skb);
406 return;
407 }
408
409 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
410 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
411 false);
412 __skb_queue_tail(&local->pending[queue], skb);
413 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
414 false);
415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
416 }
417
418 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
419 struct sk_buff_head *skbs)
420 {
421 struct ieee80211_hw *hw = &local->hw;
422 struct sk_buff *skb;
423 unsigned long flags;
424 int queue, i;
425
426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
427 while ((skb = skb_dequeue(skbs))) {
428 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
429
430 if (WARN_ON(!info->control.vif)) {
431 ieee80211_free_txskb(&local->hw, skb);
432 continue;
433 }
434
435 queue = info->hw_queue;
436
437 __ieee80211_stop_queue(hw, queue,
438 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
439 false);
440
441 __skb_queue_tail(&local->pending[queue], skb);
442 }
443
444 for (i = 0; i < hw->queues; i++)
445 __ieee80211_wake_queue(hw, i,
446 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
447 false);
448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449 }
450
451 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
452 unsigned long queues,
453 enum queue_stop_reason reason,
454 bool refcounted)
455 {
456 struct ieee80211_local *local = hw_to_local(hw);
457 unsigned long flags;
458 int i;
459
460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
461
462 for_each_set_bit(i, &queues, hw->queues)
463 __ieee80211_stop_queue(hw, i, reason, refcounted);
464
465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
466 }
467
468 void ieee80211_stop_queues(struct ieee80211_hw *hw)
469 {
470 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
471 IEEE80211_QUEUE_STOP_REASON_DRIVER,
472 false);
473 }
474 EXPORT_SYMBOL(ieee80211_stop_queues);
475
476 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
477 {
478 struct ieee80211_local *local = hw_to_local(hw);
479 unsigned long flags;
480 int ret;
481
482 if (WARN_ON(queue >= hw->queues))
483 return true;
484
485 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
486 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
487 &local->queue_stop_reasons[queue]);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 return ret;
490 }
491 EXPORT_SYMBOL(ieee80211_queue_stopped);
492
493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 unsigned long queues,
495 enum queue_stop_reason reason,
496 bool refcounted)
497 {
498 struct ieee80211_local *local = hw_to_local(hw);
499 unsigned long flags;
500 int i;
501
502 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
503
504 for_each_set_bit(i, &queues, hw->queues)
505 __ieee80211_wake_queue(hw, i, reason, refcounted);
506
507 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
508 }
509
510 void ieee80211_wake_queues(struct ieee80211_hw *hw)
511 {
512 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
513 IEEE80211_QUEUE_STOP_REASON_DRIVER,
514 false);
515 }
516 EXPORT_SYMBOL(ieee80211_wake_queues);
517
518 static unsigned int
519 ieee80211_get_vif_queues(struct ieee80211_local *local,
520 struct ieee80211_sub_if_data *sdata)
521 {
522 unsigned int queues;
523
524 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
525 int ac;
526
527 queues = 0;
528
529 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
530 queues |= BIT(sdata->vif.hw_queue[ac]);
531 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
532 queues |= BIT(sdata->vif.cab_queue);
533 } else {
534 /* all queues */
535 queues = BIT(local->hw.queues) - 1;
536 }
537
538 return queues;
539 }
540
541 void __ieee80211_flush_queues(struct ieee80211_local *local,
542 struct ieee80211_sub_if_data *sdata,
543 unsigned int queues, bool drop)
544 {
545 if (!local->ops->flush)
546 return;
547
548 /*
549 * If no queue was set, or if the HW doesn't support
550 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
551 */
552 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
553 queues = ieee80211_get_vif_queues(local, sdata);
554
555 ieee80211_stop_queues_by_reason(&local->hw, queues,
556 IEEE80211_QUEUE_STOP_REASON_FLUSH,
557 false);
558
559 drv_flush(local, sdata, queues, drop);
560
561 ieee80211_wake_queues_by_reason(&local->hw, queues,
562 IEEE80211_QUEUE_STOP_REASON_FLUSH,
563 false);
564 }
565
566 void ieee80211_flush_queues(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata, bool drop)
568 {
569 __ieee80211_flush_queues(local, sdata, 0, drop);
570 }
571
572 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
573 struct ieee80211_sub_if_data *sdata,
574 enum queue_stop_reason reason)
575 {
576 ieee80211_stop_queues_by_reason(&local->hw,
577 ieee80211_get_vif_queues(local, sdata),
578 reason, true);
579 }
580
581 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
582 struct ieee80211_sub_if_data *sdata,
583 enum queue_stop_reason reason)
584 {
585 ieee80211_wake_queues_by_reason(&local->hw,
586 ieee80211_get_vif_queues(local, sdata),
587 reason, true);
588 }
589
590 static void __iterate_interfaces(struct ieee80211_local *local,
591 u32 iter_flags,
592 void (*iterator)(void *data, u8 *mac,
593 struct ieee80211_vif *vif),
594 void *data)
595 {
596 struct ieee80211_sub_if_data *sdata;
597 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
598
599 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
600 switch (sdata->vif.type) {
601 case NL80211_IFTYPE_MONITOR:
602 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
603 continue;
604 break;
605 case NL80211_IFTYPE_AP_VLAN:
606 continue;
607 default:
608 break;
609 }
610 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
611 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
612 continue;
613 if (ieee80211_sdata_running(sdata) || !active_only)
614 iterator(data, sdata->vif.addr,
615 &sdata->vif);
616 }
617
618 sdata = rcu_dereference_check(local->monitor_sdata,
619 lockdep_is_held(&local->iflist_mtx) ||
620 lockdep_rtnl_is_held());
621 if (sdata &&
622 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
623 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
624 iterator(data, sdata->vif.addr, &sdata->vif);
625 }
626
627 void ieee80211_iterate_interfaces(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
631 void *data)
632 {
633 struct ieee80211_local *local = hw_to_local(hw);
634
635 mutex_lock(&local->iflist_mtx);
636 __iterate_interfaces(local, iter_flags, iterator, data);
637 mutex_unlock(&local->iflist_mtx);
638 }
639 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
640
641 void ieee80211_iterate_active_interfaces_atomic(
642 struct ieee80211_hw *hw, u32 iter_flags,
643 void (*iterator)(void *data, u8 *mac,
644 struct ieee80211_vif *vif),
645 void *data)
646 {
647 struct ieee80211_local *local = hw_to_local(hw);
648
649 rcu_read_lock();
650 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
651 iterator, data);
652 rcu_read_unlock();
653 }
654 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
655
656 void ieee80211_iterate_active_interfaces_rtnl(
657 struct ieee80211_hw *hw, u32 iter_flags,
658 void (*iterator)(void *data, u8 *mac,
659 struct ieee80211_vif *vif),
660 void *data)
661 {
662 struct ieee80211_local *local = hw_to_local(hw);
663
664 ASSERT_RTNL();
665
666 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
667 iterator, data);
668 }
669 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
670
671 static void __iterate_stations(struct ieee80211_local *local,
672 void (*iterator)(void *data,
673 struct ieee80211_sta *sta),
674 void *data)
675 {
676 struct sta_info *sta;
677
678 list_for_each_entry_rcu(sta, &local->sta_list, list) {
679 if (!sta->uploaded)
680 continue;
681
682 iterator(data, &sta->sta);
683 }
684 }
685
686 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
687 void (*iterator)(void *data,
688 struct ieee80211_sta *sta),
689 void *data)
690 {
691 struct ieee80211_local *local = hw_to_local(hw);
692
693 rcu_read_lock();
694 __iterate_stations(local, iterator, data);
695 rcu_read_unlock();
696 }
697 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
698
699 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
700 {
701 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
702
703 if (!ieee80211_sdata_running(sdata) ||
704 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
705 return NULL;
706 return &sdata->vif;
707 }
708 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
709
710 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
711 {
712 struct ieee80211_sub_if_data *sdata;
713
714 if (!vif)
715 return NULL;
716
717 sdata = vif_to_sdata(vif);
718
719 if (!ieee80211_sdata_running(sdata) ||
720 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
721 return NULL;
722
723 return &sdata->wdev;
724 }
725 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
726
727 /*
728 * Nothing should have been stuffed into the workqueue during
729 * the suspend->resume cycle. Since we can't check each caller
730 * of this function if we are already quiescing / suspended,
731 * check here and don't WARN since this can actually happen when
732 * the rx path (for example) is racing against __ieee80211_suspend
733 * and suspending / quiescing was set after the rx path checked
734 * them.
735 */
736 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
737 {
738 if (local->quiescing || (local->suspended && !local->resuming)) {
739 pr_warn("queueing ieee80211 work while going to suspend\n");
740 return false;
741 }
742
743 return true;
744 }
745
746 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
747 {
748 struct ieee80211_local *local = hw_to_local(hw);
749
750 if (!ieee80211_can_queue_work(local))
751 return;
752
753 queue_work(local->workqueue, work);
754 }
755 EXPORT_SYMBOL(ieee80211_queue_work);
756
757 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
758 struct delayed_work *dwork,
759 unsigned long delay)
760 {
761 struct ieee80211_local *local = hw_to_local(hw);
762
763 if (!ieee80211_can_queue_work(local))
764 return;
765
766 queue_delayed_work(local->workqueue, dwork, delay);
767 }
768 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
769
770 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
771 struct ieee802_11_elems *elems,
772 u64 filter, u32 crc)
773 {
774 size_t left = len;
775 const u8 *pos = start;
776 bool calc_crc = filter != 0;
777 DECLARE_BITMAP(seen_elems, 256);
778 const u8 *ie;
779
780 bitmap_zero(seen_elems, 256);
781 memset(elems, 0, sizeof(*elems));
782 elems->ie_start = start;
783 elems->total_len = len;
784
785 while (left >= 2) {
786 u8 id, elen;
787 bool elem_parse_failed;
788
789 id = *pos++;
790 elen = *pos++;
791 left -= 2;
792
793 if (elen > left) {
794 elems->parse_error = true;
795 break;
796 }
797
798 switch (id) {
799 case WLAN_EID_SSID:
800 case WLAN_EID_SUPP_RATES:
801 case WLAN_EID_FH_PARAMS:
802 case WLAN_EID_DS_PARAMS:
803 case WLAN_EID_CF_PARAMS:
804 case WLAN_EID_TIM:
805 case WLAN_EID_IBSS_PARAMS:
806 case WLAN_EID_CHALLENGE:
807 case WLAN_EID_RSN:
808 case WLAN_EID_ERP_INFO:
809 case WLAN_EID_EXT_SUPP_RATES:
810 case WLAN_EID_HT_CAPABILITY:
811 case WLAN_EID_HT_OPERATION:
812 case WLAN_EID_VHT_CAPABILITY:
813 case WLAN_EID_VHT_OPERATION:
814 case WLAN_EID_MESH_ID:
815 case WLAN_EID_MESH_CONFIG:
816 case WLAN_EID_PEER_MGMT:
817 case WLAN_EID_PREQ:
818 case WLAN_EID_PREP:
819 case WLAN_EID_PERR:
820 case WLAN_EID_RANN:
821 case WLAN_EID_CHANNEL_SWITCH:
822 case WLAN_EID_EXT_CHANSWITCH_ANN:
823 case WLAN_EID_COUNTRY:
824 case WLAN_EID_PWR_CONSTRAINT:
825 case WLAN_EID_TIMEOUT_INTERVAL:
826 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
827 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
828 case WLAN_EID_CHAN_SWITCH_PARAM:
829 case WLAN_EID_EXT_CAPABILITY:
830 case WLAN_EID_CHAN_SWITCH_TIMING:
831 case WLAN_EID_LINK_ID:
832 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
833 /*
834 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
835 * that if the content gets bigger it might be needed more than once
836 */
837 if (test_bit(id, seen_elems)) {
838 elems->parse_error = true;
839 left -= elen;
840 pos += elen;
841 continue;
842 }
843 break;
844 }
845
846 if (calc_crc && id < 64 && (filter & (1ULL << id)))
847 crc = crc32_be(crc, pos - 2, elen + 2);
848
849 elem_parse_failed = false;
850
851 switch (id) {
852 case WLAN_EID_LINK_ID:
853 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
854 elem_parse_failed = true;
855 break;
856 }
857 elems->lnk_id = (void *)(pos - 2);
858 break;
859 case WLAN_EID_CHAN_SWITCH_TIMING:
860 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
861 elem_parse_failed = true;
862 break;
863 }
864 elems->ch_sw_timing = (void *)pos;
865 break;
866 case WLAN_EID_EXT_CAPABILITY:
867 elems->ext_capab = pos;
868 elems->ext_capab_len = elen;
869 break;
870 case WLAN_EID_SSID:
871 elems->ssid = pos;
872 elems->ssid_len = elen;
873 break;
874 case WLAN_EID_SUPP_RATES:
875 elems->supp_rates = pos;
876 elems->supp_rates_len = elen;
877 break;
878 case WLAN_EID_DS_PARAMS:
879 if (elen >= 1)
880 elems->ds_params = pos;
881 else
882 elem_parse_failed = true;
883 break;
884 case WLAN_EID_TIM:
885 if (elen >= sizeof(struct ieee80211_tim_ie)) {
886 elems->tim = (void *)pos;
887 elems->tim_len = elen;
888 } else
889 elem_parse_failed = true;
890 break;
891 case WLAN_EID_CHALLENGE:
892 elems->challenge = pos;
893 elems->challenge_len = elen;
894 break;
895 case WLAN_EID_VENDOR_SPECIFIC:
896 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
897 pos[2] == 0xf2) {
898 /* Microsoft OUI (00:50:F2) */
899
900 if (calc_crc)
901 crc = crc32_be(crc, pos - 2, elen + 2);
902
903 if (elen >= 5 && pos[3] == 2) {
904 /* OUI Type 2 - WMM IE */
905 if (pos[4] == 0) {
906 elems->wmm_info = pos;
907 elems->wmm_info_len = elen;
908 } else if (pos[4] == 1) {
909 elems->wmm_param = pos;
910 elems->wmm_param_len = elen;
911 }
912 }
913 }
914 break;
915 case WLAN_EID_RSN:
916 elems->rsn = pos;
917 elems->rsn_len = elen;
918 break;
919 case WLAN_EID_ERP_INFO:
920 if (elen >= 1)
921 elems->erp_info = pos;
922 else
923 elem_parse_failed = true;
924 break;
925 case WLAN_EID_EXT_SUPP_RATES:
926 elems->ext_supp_rates = pos;
927 elems->ext_supp_rates_len = elen;
928 break;
929 case WLAN_EID_HT_CAPABILITY:
930 if (elen >= sizeof(struct ieee80211_ht_cap))
931 elems->ht_cap_elem = (void *)pos;
932 else
933 elem_parse_failed = true;
934 break;
935 case WLAN_EID_HT_OPERATION:
936 if (elen >= sizeof(struct ieee80211_ht_operation))
937 elems->ht_operation = (void *)pos;
938 else
939 elem_parse_failed = true;
940 break;
941 case WLAN_EID_VHT_CAPABILITY:
942 if (elen >= sizeof(struct ieee80211_vht_cap))
943 elems->vht_cap_elem = (void *)pos;
944 else
945 elem_parse_failed = true;
946 break;
947 case WLAN_EID_VHT_OPERATION:
948 if (elen >= sizeof(struct ieee80211_vht_operation)) {
949 elems->vht_operation = (void *)pos;
950 if (calc_crc)
951 crc = crc32_be(crc, pos - 2, elen + 2);
952 break;
953 }
954 elem_parse_failed = true;
955 break;
956 case WLAN_EID_OPMODE_NOTIF:
957 if (elen > 0) {
958 elems->opmode_notif = pos;
959 if (calc_crc)
960 crc = crc32_be(crc, pos - 2, elen + 2);
961 break;
962 }
963 elem_parse_failed = true;
964 break;
965 case WLAN_EID_MESH_ID:
966 elems->mesh_id = pos;
967 elems->mesh_id_len = elen;
968 break;
969 case WLAN_EID_MESH_CONFIG:
970 if (elen >= sizeof(struct ieee80211_meshconf_ie))
971 elems->mesh_config = (void *)pos;
972 else
973 elem_parse_failed = true;
974 break;
975 case WLAN_EID_PEER_MGMT:
976 elems->peering = pos;
977 elems->peering_len = elen;
978 break;
979 case WLAN_EID_MESH_AWAKE_WINDOW:
980 if (elen >= 2)
981 elems->awake_window = (void *)pos;
982 break;
983 case WLAN_EID_PREQ:
984 elems->preq = pos;
985 elems->preq_len = elen;
986 break;
987 case WLAN_EID_PREP:
988 elems->prep = pos;
989 elems->prep_len = elen;
990 break;
991 case WLAN_EID_PERR:
992 elems->perr = pos;
993 elems->perr_len = elen;
994 break;
995 case WLAN_EID_RANN:
996 if (elen >= sizeof(struct ieee80211_rann_ie))
997 elems->rann = (void *)pos;
998 else
999 elem_parse_failed = true;
1000 break;
1001 case WLAN_EID_CHANNEL_SWITCH:
1002 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1003 elem_parse_failed = true;
1004 break;
1005 }
1006 elems->ch_switch_ie = (void *)pos;
1007 break;
1008 case WLAN_EID_EXT_CHANSWITCH_ANN:
1009 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1010 elem_parse_failed = true;
1011 break;
1012 }
1013 elems->ext_chansw_ie = (void *)pos;
1014 break;
1015 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1016 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1017 elem_parse_failed = true;
1018 break;
1019 }
1020 elems->sec_chan_offs = (void *)pos;
1021 break;
1022 case WLAN_EID_CHAN_SWITCH_PARAM:
1023 if (elen !=
1024 sizeof(*elems->mesh_chansw_params_ie)) {
1025 elem_parse_failed = true;
1026 break;
1027 }
1028 elems->mesh_chansw_params_ie = (void *)pos;
1029 break;
1030 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1031 if (!action ||
1032 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1033 elem_parse_failed = true;
1034 break;
1035 }
1036 elems->wide_bw_chansw_ie = (void *)pos;
1037 break;
1038 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1039 if (action) {
1040 elem_parse_failed = true;
1041 break;
1042 }
1043 /*
1044 * This is a bit tricky, but as we only care about
1045 * the wide bandwidth channel switch element, so
1046 * just parse it out manually.
1047 */
1048 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1049 pos, elen);
1050 if (ie) {
1051 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1052 elems->wide_bw_chansw_ie =
1053 (void *)(ie + 2);
1054 else
1055 elem_parse_failed = true;
1056 }
1057 break;
1058 case WLAN_EID_COUNTRY:
1059 elems->country_elem = pos;
1060 elems->country_elem_len = elen;
1061 break;
1062 case WLAN_EID_PWR_CONSTRAINT:
1063 if (elen != 1) {
1064 elem_parse_failed = true;
1065 break;
1066 }
1067 elems->pwr_constr_elem = pos;
1068 break;
1069 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1070 /* Lots of different options exist, but we only care
1071 * about the Dynamic Transmit Power Control element.
1072 * First check for the Cisco OUI, then for the DTPC
1073 * tag (0x00).
1074 */
1075 if (elen < 4) {
1076 elem_parse_failed = true;
1077 break;
1078 }
1079
1080 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1081 pos[2] != 0x96 || pos[3] != 0x00)
1082 break;
1083
1084 if (elen != 6) {
1085 elem_parse_failed = true;
1086 break;
1087 }
1088
1089 if (calc_crc)
1090 crc = crc32_be(crc, pos - 2, elen + 2);
1091
1092 elems->cisco_dtpc_elem = pos;
1093 break;
1094 case WLAN_EID_TIMEOUT_INTERVAL:
1095 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1096 elems->timeout_int = (void *)pos;
1097 else
1098 elem_parse_failed = true;
1099 break;
1100 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1101 if (elen >= sizeof(*elems->max_idle_period_ie))
1102 elems->max_idle_period_ie = (void *)pos;
1103 break;
1104 case WLAN_EID_EXTENSION:
1105 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1106 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1107 elems->mu_edca_param_set = (void *)&pos[1];
1108 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1109 elems->he_cap = (void *)&pos[1];
1110 elems->he_cap_len = elen - 1;
1111 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1112 elen >= sizeof(*elems->he_operation) &&
1113 elen >= ieee80211_he_oper_size(&pos[1])) {
1114 elems->he_operation = (void *)&pos[1];
1115 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1116 elems->uora_element = (void *)&pos[1];
1117 }
1118 break;
1119 default:
1120 break;
1121 }
1122
1123 if (elem_parse_failed)
1124 elems->parse_error = true;
1125 else
1126 __set_bit(id, seen_elems);
1127
1128 left -= elen;
1129 pos += elen;
1130 }
1131
1132 if (left != 0)
1133 elems->parse_error = true;
1134
1135 return crc;
1136 }
1137
1138 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1139 struct ieee80211_tx_queue_params
1140 *qparam, int ac)
1141 {
1142 struct ieee80211_chanctx_conf *chanctx_conf;
1143 const struct ieee80211_reg_rule *rrule;
1144 const struct ieee80211_wmm_ac *wmm_ac;
1145 u16 center_freq = 0;
1146
1147 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1148 sdata->vif.type != NL80211_IFTYPE_STATION)
1149 return;
1150
1151 rcu_read_lock();
1152 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1153 if (chanctx_conf)
1154 center_freq = chanctx_conf->def.chan->center_freq;
1155
1156 if (!center_freq) {
1157 rcu_read_unlock();
1158 return;
1159 }
1160
1161 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1162
1163 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1164 rcu_read_unlock();
1165 return;
1166 }
1167
1168 if (sdata->vif.type == NL80211_IFTYPE_AP)
1169 wmm_ac = &rrule->wmm_rule.ap[ac];
1170 else
1171 wmm_ac = &rrule->wmm_rule.client[ac];
1172 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1173 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1174 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1175 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1176 rcu_read_unlock();
1177 }
1178
1179 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1180 bool bss_notify, bool enable_qos)
1181 {
1182 struct ieee80211_local *local = sdata->local;
1183 struct ieee80211_tx_queue_params qparam;
1184 struct ieee80211_chanctx_conf *chanctx_conf;
1185 int ac;
1186 bool use_11b;
1187 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1188 int aCWmin, aCWmax;
1189
1190 if (!local->ops->conf_tx)
1191 return;
1192
1193 if (local->hw.queues < IEEE80211_NUM_ACS)
1194 return;
1195
1196 memset(&qparam, 0, sizeof(qparam));
1197
1198 rcu_read_lock();
1199 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1200 use_11b = (chanctx_conf &&
1201 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1202 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1203 rcu_read_unlock();
1204
1205 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1206
1207 /* Set defaults according to 802.11-2007 Table 7-37 */
1208 aCWmax = 1023;
1209 if (use_11b)
1210 aCWmin = 31;
1211 else
1212 aCWmin = 15;
1213
1214 /* Confiure old 802.11b/g medium access rules. */
1215 qparam.cw_max = aCWmax;
1216 qparam.cw_min = aCWmin;
1217 qparam.txop = 0;
1218 qparam.aifs = 2;
1219
1220 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1221 /* Update if QoS is enabled. */
1222 if (enable_qos) {
1223 switch (ac) {
1224 case IEEE80211_AC_BK:
1225 qparam.cw_max = aCWmax;
1226 qparam.cw_min = aCWmin;
1227 qparam.txop = 0;
1228 if (is_ocb)
1229 qparam.aifs = 9;
1230 else
1231 qparam.aifs = 7;
1232 break;
1233 /* never happens but let's not leave undefined */
1234 default:
1235 case IEEE80211_AC_BE:
1236 qparam.cw_max = aCWmax;
1237 qparam.cw_min = aCWmin;
1238 qparam.txop = 0;
1239 if (is_ocb)
1240 qparam.aifs = 6;
1241 else
1242 qparam.aifs = 3;
1243 break;
1244 case IEEE80211_AC_VI:
1245 qparam.cw_max = aCWmin;
1246 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1247 if (is_ocb)
1248 qparam.txop = 0;
1249 else if (use_11b)
1250 qparam.txop = 6016/32;
1251 else
1252 qparam.txop = 3008/32;
1253
1254 if (is_ocb)
1255 qparam.aifs = 3;
1256 else
1257 qparam.aifs = 2;
1258 break;
1259 case IEEE80211_AC_VO:
1260 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1261 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1262 if (is_ocb)
1263 qparam.txop = 0;
1264 else if (use_11b)
1265 qparam.txop = 3264/32;
1266 else
1267 qparam.txop = 1504/32;
1268 qparam.aifs = 2;
1269 break;
1270 }
1271 }
1272 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1273
1274 qparam.uapsd = false;
1275
1276 sdata->tx_conf[ac] = qparam;
1277 drv_conf_tx(local, sdata, ac, &qparam);
1278 }
1279
1280 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1281 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1282 sdata->vif.type != NL80211_IFTYPE_NAN) {
1283 sdata->vif.bss_conf.qos = enable_qos;
1284 if (bss_notify)
1285 ieee80211_bss_info_change_notify(sdata,
1286 BSS_CHANGED_QOS);
1287 }
1288 }
1289
1290 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1291 u16 transaction, u16 auth_alg, u16 status,
1292 const u8 *extra, size_t extra_len, const u8 *da,
1293 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1294 u32 tx_flags)
1295 {
1296 struct ieee80211_local *local = sdata->local;
1297 struct sk_buff *skb;
1298 struct ieee80211_mgmt *mgmt;
1299 int err;
1300
1301 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1302 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1303 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1304 if (!skb)
1305 return;
1306
1307 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1308
1309 mgmt = skb_put_zero(skb, 24 + 6);
1310 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1311 IEEE80211_STYPE_AUTH);
1312 memcpy(mgmt->da, da, ETH_ALEN);
1313 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1314 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1315 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1316 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1317 mgmt->u.auth.status_code = cpu_to_le16(status);
1318 if (extra)
1319 skb_put_data(skb, extra, extra_len);
1320
1321 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1322 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1323 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1324 WARN_ON(err);
1325 }
1326
1327 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1328 tx_flags;
1329 ieee80211_tx_skb(sdata, skb);
1330 }
1331
1332 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1333 const u8 *bssid, u16 stype, u16 reason,
1334 bool send_frame, u8 *frame_buf)
1335 {
1336 struct ieee80211_local *local = sdata->local;
1337 struct sk_buff *skb;
1338 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1339
1340 /* build frame */
1341 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1342 mgmt->duration = 0; /* initialize only */
1343 mgmt->seq_ctrl = 0; /* initialize only */
1344 memcpy(mgmt->da, bssid, ETH_ALEN);
1345 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1346 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1347 /* u.deauth.reason_code == u.disassoc.reason_code */
1348 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1349
1350 if (send_frame) {
1351 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1352 IEEE80211_DEAUTH_FRAME_LEN);
1353 if (!skb)
1354 return;
1355
1356 skb_reserve(skb, local->hw.extra_tx_headroom);
1357
1358 /* copy in frame */
1359 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1360
1361 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1362 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1363 IEEE80211_SKB_CB(skb)->flags |=
1364 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1365
1366 ieee80211_tx_skb(sdata, skb);
1367 }
1368 }
1369
1370 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1371 u8 *buffer, size_t buffer_len,
1372 const u8 *ie, size_t ie_len,
1373 enum nl80211_band band,
1374 u32 rate_mask,
1375 struct cfg80211_chan_def *chandef,
1376 size_t *offset, u32 flags)
1377 {
1378 struct ieee80211_supported_band *sband;
1379 const struct ieee80211_sta_he_cap *he_cap;
1380 u8 *pos = buffer, *end = buffer + buffer_len;
1381 size_t noffset;
1382 int supp_rates_len, i;
1383 u8 rates[32];
1384 int num_rates;
1385 int ext_rates_len;
1386 int shift;
1387 u32 rate_flags;
1388 bool have_80mhz = false;
1389
1390 *offset = 0;
1391
1392 sband = local->hw.wiphy->bands[band];
1393 if (WARN_ON_ONCE(!sband))
1394 return 0;
1395
1396 rate_flags = ieee80211_chandef_rate_flags(chandef);
1397 shift = ieee80211_chandef_get_shift(chandef);
1398
1399 num_rates = 0;
1400 for (i = 0; i < sband->n_bitrates; i++) {
1401 if ((BIT(i) & rate_mask) == 0)
1402 continue; /* skip rate */
1403 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1404 continue;
1405
1406 rates[num_rates++] =
1407 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1408 (1 << shift) * 5);
1409 }
1410
1411 supp_rates_len = min_t(int, num_rates, 8);
1412
1413 if (end - pos < 2 + supp_rates_len)
1414 goto out_err;
1415 *pos++ = WLAN_EID_SUPP_RATES;
1416 *pos++ = supp_rates_len;
1417 memcpy(pos, rates, supp_rates_len);
1418 pos += supp_rates_len;
1419
1420 /* insert "request information" if in custom IEs */
1421 if (ie && ie_len) {
1422 static const u8 before_extrates[] = {
1423 WLAN_EID_SSID,
1424 WLAN_EID_SUPP_RATES,
1425 WLAN_EID_REQUEST,
1426 };
1427 noffset = ieee80211_ie_split(ie, ie_len,
1428 before_extrates,
1429 ARRAY_SIZE(before_extrates),
1430 *offset);
1431 if (end - pos < noffset - *offset)
1432 goto out_err;
1433 memcpy(pos, ie + *offset, noffset - *offset);
1434 pos += noffset - *offset;
1435 *offset = noffset;
1436 }
1437
1438 ext_rates_len = num_rates - supp_rates_len;
1439 if (ext_rates_len > 0) {
1440 if (end - pos < 2 + ext_rates_len)
1441 goto out_err;
1442 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1443 *pos++ = ext_rates_len;
1444 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1445 pos += ext_rates_len;
1446 }
1447
1448 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1449 if (end - pos < 3)
1450 goto out_err;
1451 *pos++ = WLAN_EID_DS_PARAMS;
1452 *pos++ = 1;
1453 *pos++ = ieee80211_frequency_to_channel(
1454 chandef->chan->center_freq);
1455 }
1456
1457 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1458 goto done;
1459
1460 /* insert custom IEs that go before HT */
1461 if (ie && ie_len) {
1462 static const u8 before_ht[] = {
1463 /*
1464 * no need to list the ones split off already
1465 * (or generated here)
1466 */
1467 WLAN_EID_DS_PARAMS,
1468 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1469 };
1470 noffset = ieee80211_ie_split(ie, ie_len,
1471 before_ht, ARRAY_SIZE(before_ht),
1472 *offset);
1473 if (end - pos < noffset - *offset)
1474 goto out_err;
1475 memcpy(pos, ie + *offset, noffset - *offset);
1476 pos += noffset - *offset;
1477 *offset = noffset;
1478 }
1479
1480 if (sband->ht_cap.ht_supported) {
1481 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1482 goto out_err;
1483 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1484 sband->ht_cap.cap);
1485 }
1486
1487 /* insert custom IEs that go before VHT */
1488 if (ie && ie_len) {
1489 static const u8 before_vht[] = {
1490 /*
1491 * no need to list the ones split off already
1492 * (or generated here)
1493 */
1494 WLAN_EID_BSS_COEX_2040,
1495 WLAN_EID_EXT_CAPABILITY,
1496 WLAN_EID_SSID_LIST,
1497 WLAN_EID_CHANNEL_USAGE,
1498 WLAN_EID_INTERWORKING,
1499 WLAN_EID_MESH_ID,
1500 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1501 };
1502 noffset = ieee80211_ie_split(ie, ie_len,
1503 before_vht, ARRAY_SIZE(before_vht),
1504 *offset);
1505 if (end - pos < noffset - *offset)
1506 goto out_err;
1507 memcpy(pos, ie + *offset, noffset - *offset);
1508 pos += noffset - *offset;
1509 *offset = noffset;
1510 }
1511
1512 /* Check if any channel in this sband supports at least 80 MHz */
1513 for (i = 0; i < sband->n_channels; i++) {
1514 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1515 IEEE80211_CHAN_NO_80MHZ))
1516 continue;
1517
1518 have_80mhz = true;
1519 break;
1520 }
1521
1522 if (sband->vht_cap.vht_supported && have_80mhz) {
1523 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1524 goto out_err;
1525 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1526 sband->vht_cap.cap);
1527 }
1528
1529 /* insert custom IEs that go before HE */
1530 if (ie && ie_len) {
1531 static const u8 before_he[] = {
1532 /*
1533 * no need to list the ones split off before VHT
1534 * or generated here
1535 */
1536 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1537 WLAN_EID_AP_CSN,
1538 /* TODO: add 11ah/11aj/11ak elements */
1539 };
1540 noffset = ieee80211_ie_split(ie, ie_len,
1541 before_he, ARRAY_SIZE(before_he),
1542 *offset);
1543 if (end - pos < noffset - *offset)
1544 goto out_err;
1545 memcpy(pos, ie + *offset, noffset - *offset);
1546 pos += noffset - *offset;
1547 *offset = noffset;
1548 }
1549
1550 he_cap = ieee80211_get_he_sta_cap(sband);
1551 if (he_cap) {
1552 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1553 if (!pos)
1554 goto out_err;
1555 }
1556
1557 /*
1558 * If adding more here, adjust code in main.c
1559 * that calculates local->scan_ies_len.
1560 */
1561
1562 return pos - buffer;
1563 out_err:
1564 WARN_ONCE(1, "not enough space for preq IEs\n");
1565 done:
1566 return pos - buffer;
1567 }
1568
1569 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1570 size_t buffer_len,
1571 struct ieee80211_scan_ies *ie_desc,
1572 const u8 *ie, size_t ie_len,
1573 u8 bands_used, u32 *rate_masks,
1574 struct cfg80211_chan_def *chandef,
1575 u32 flags)
1576 {
1577 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1578 int i;
1579
1580 memset(ie_desc, 0, sizeof(*ie_desc));
1581
1582 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1583 if (bands_used & BIT(i)) {
1584 pos += ieee80211_build_preq_ies_band(local,
1585 buffer + pos,
1586 buffer_len - pos,
1587 ie, ie_len, i,
1588 rate_masks[i],
1589 chandef,
1590 &custom_ie_offset,
1591 flags);
1592 ie_desc->ies[i] = buffer + old_pos;
1593 ie_desc->len[i] = pos - old_pos;
1594 old_pos = pos;
1595 }
1596 }
1597
1598 /* add any remaining custom IEs */
1599 if (ie && ie_len) {
1600 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1601 "not enough space for preq custom IEs\n"))
1602 return pos;
1603 memcpy(buffer + pos, ie + custom_ie_offset,
1604 ie_len - custom_ie_offset);
1605 ie_desc->common_ies = buffer + pos;
1606 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1607 pos += ie_len - custom_ie_offset;
1608 }
1609
1610 return pos;
1611 };
1612
1613 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1614 const u8 *src, const u8 *dst,
1615 u32 ratemask,
1616 struct ieee80211_channel *chan,
1617 const u8 *ssid, size_t ssid_len,
1618 const u8 *ie, size_t ie_len,
1619 u32 flags)
1620 {
1621 struct ieee80211_local *local = sdata->local;
1622 struct cfg80211_chan_def chandef;
1623 struct sk_buff *skb;
1624 struct ieee80211_mgmt *mgmt;
1625 int ies_len;
1626 u32 rate_masks[NUM_NL80211_BANDS] = {};
1627 struct ieee80211_scan_ies dummy_ie_desc;
1628
1629 /*
1630 * Do not send DS Channel parameter for directed probe requests
1631 * in order to maximize the chance that we get a response. Some
1632 * badly-behaved APs don't respond when this parameter is included.
1633 */
1634 chandef.width = sdata->vif.bss_conf.chandef.width;
1635 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1636 chandef.chan = NULL;
1637 else
1638 chandef.chan = chan;
1639
1640 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1641 100 + ie_len);
1642 if (!skb)
1643 return NULL;
1644
1645 rate_masks[chan->band] = ratemask;
1646 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1647 skb_tailroom(skb), &dummy_ie_desc,
1648 ie, ie_len, BIT(chan->band),
1649 rate_masks, &chandef, flags);
1650 skb_put(skb, ies_len);
1651
1652 if (dst) {
1653 mgmt = (struct ieee80211_mgmt *) skb->data;
1654 memcpy(mgmt->da, dst, ETH_ALEN);
1655 memcpy(mgmt->bssid, dst, ETH_ALEN);
1656 }
1657
1658 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1659
1660 return skb;
1661 }
1662
1663 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1664 struct ieee802_11_elems *elems,
1665 enum nl80211_band band, u32 *basic_rates)
1666 {
1667 struct ieee80211_supported_band *sband;
1668 size_t num_rates;
1669 u32 supp_rates, rate_flags;
1670 int i, j, shift;
1671
1672 sband = sdata->local->hw.wiphy->bands[band];
1673 if (WARN_ON(!sband))
1674 return 1;
1675
1676 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1677 shift = ieee80211_vif_get_shift(&sdata->vif);
1678
1679 num_rates = sband->n_bitrates;
1680 supp_rates = 0;
1681 for (i = 0; i < elems->supp_rates_len +
1682 elems->ext_supp_rates_len; i++) {
1683 u8 rate = 0;
1684 int own_rate;
1685 bool is_basic;
1686 if (i < elems->supp_rates_len)
1687 rate = elems->supp_rates[i];
1688 else if (elems->ext_supp_rates)
1689 rate = elems->ext_supp_rates
1690 [i - elems->supp_rates_len];
1691 own_rate = 5 * (rate & 0x7f);
1692 is_basic = !!(rate & 0x80);
1693
1694 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1695 continue;
1696
1697 for (j = 0; j < num_rates; j++) {
1698 int brate;
1699 if ((rate_flags & sband->bitrates[j].flags)
1700 != rate_flags)
1701 continue;
1702
1703 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1704 1 << shift);
1705
1706 if (brate == own_rate) {
1707 supp_rates |= BIT(j);
1708 if (basic_rates && is_basic)
1709 *basic_rates |= BIT(j);
1710 }
1711 }
1712 }
1713 return supp_rates;
1714 }
1715
1716 void ieee80211_stop_device(struct ieee80211_local *local)
1717 {
1718 ieee80211_led_radio(local, false);
1719 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1720
1721 cancel_work_sync(&local->reconfig_filter);
1722
1723 flush_workqueue(local->workqueue);
1724 drv_stop(local);
1725 }
1726
1727 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1728 bool aborted)
1729 {
1730 /* It's possible that we don't handle the scan completion in
1731 * time during suspend, so if it's still marked as completed
1732 * here, queue the work and flush it to clean things up.
1733 * Instead of calling the worker function directly here, we
1734 * really queue it to avoid potential races with other flows
1735 * scheduling the same work.
1736 */
1737 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1738 /* If coming from reconfiguration failure, abort the scan so
1739 * we don't attempt to continue a partial HW scan - which is
1740 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1741 * completed scan, and a 5 GHz portion is still pending.
1742 */
1743 if (aborted)
1744 set_bit(SCAN_ABORTED, &local->scanning);
1745 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1746 flush_delayed_work(&local->scan_work);
1747 }
1748 }
1749
1750 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1751 {
1752 struct ieee80211_sub_if_data *sdata;
1753 struct ieee80211_chanctx *ctx;
1754
1755 /*
1756 * We get here if during resume the device can't be restarted properly.
1757 * We might also get here if this happens during HW reset, which is a
1758 * slightly different situation and we need to drop all connections in
1759 * the latter case.
1760 *
1761 * Ask cfg80211 to turn off all interfaces, this will result in more
1762 * warnings but at least we'll then get into a clean stopped state.
1763 */
1764
1765 local->resuming = false;
1766 local->suspended = false;
1767 local->in_reconfig = false;
1768
1769 ieee80211_flush_completed_scan(local, true);
1770
1771 /* scheduled scan clearly can't be running any more, but tell
1772 * cfg80211 and clear local state
1773 */
1774 ieee80211_sched_scan_end(local);
1775
1776 list_for_each_entry(sdata, &local->interfaces, list)
1777 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1778
1779 /* Mark channel contexts as not being in the driver any more to avoid
1780 * removing them from the driver during the shutdown process...
1781 */
1782 mutex_lock(&local->chanctx_mtx);
1783 list_for_each_entry(ctx, &local->chanctx_list, list)
1784 ctx->driver_present = false;
1785 mutex_unlock(&local->chanctx_mtx);
1786
1787 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1788 }
1789
1790 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1791 struct ieee80211_sub_if_data *sdata)
1792 {
1793 struct ieee80211_chanctx_conf *conf;
1794 struct ieee80211_chanctx *ctx;
1795
1796 if (!local->use_chanctx)
1797 return;
1798
1799 mutex_lock(&local->chanctx_mtx);
1800 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1801 lockdep_is_held(&local->chanctx_mtx));
1802 if (conf) {
1803 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1804 drv_assign_vif_chanctx(local, sdata, ctx);
1805 }
1806 mutex_unlock(&local->chanctx_mtx);
1807 }
1808
1809 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1810 {
1811 struct ieee80211_local *local = sdata->local;
1812 struct sta_info *sta;
1813
1814 /* add STAs back */
1815 mutex_lock(&local->sta_mtx);
1816 list_for_each_entry(sta, &local->sta_list, list) {
1817 enum ieee80211_sta_state state;
1818
1819 if (!sta->uploaded || sta->sdata != sdata)
1820 continue;
1821
1822 for (state = IEEE80211_STA_NOTEXIST;
1823 state < sta->sta_state; state++)
1824 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1825 state + 1));
1826 }
1827 mutex_unlock(&local->sta_mtx);
1828 }
1829
1830 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1831 {
1832 struct cfg80211_nan_func *func, **funcs;
1833 int res, id, i = 0;
1834
1835 res = drv_start_nan(sdata->local, sdata,
1836 &sdata->u.nan.conf);
1837 if (WARN_ON(res))
1838 return res;
1839
1840 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1841 sizeof(*funcs),
1842 GFP_KERNEL);
1843 if (!funcs)
1844 return -ENOMEM;
1845
1846 /* Add all the functions:
1847 * This is a little bit ugly. We need to call a potentially sleeping
1848 * callback for each NAN function, so we can't hold the spinlock.
1849 */
1850 spin_lock_bh(&sdata->u.nan.func_lock);
1851
1852 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1853 funcs[i++] = func;
1854
1855 spin_unlock_bh(&sdata->u.nan.func_lock);
1856
1857 for (i = 0; funcs[i]; i++) {
1858 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1859 if (WARN_ON(res))
1860 ieee80211_nan_func_terminated(&sdata->vif,
1861 funcs[i]->instance_id,
1862 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1863 GFP_KERNEL);
1864 }
1865
1866 kfree(funcs);
1867
1868 return 0;
1869 }
1870
1871 int ieee80211_reconfig(struct ieee80211_local *local)
1872 {
1873 struct ieee80211_hw *hw = &local->hw;
1874 struct ieee80211_sub_if_data *sdata;
1875 struct ieee80211_chanctx *ctx;
1876 struct sta_info *sta;
1877 int res, i;
1878 bool reconfig_due_to_wowlan = false;
1879 struct ieee80211_sub_if_data *sched_scan_sdata;
1880 struct cfg80211_sched_scan_request *sched_scan_req;
1881 bool sched_scan_stopped = false;
1882 bool suspended = local->suspended;
1883
1884 /* nothing to do if HW shouldn't run */
1885 if (!local->open_count)
1886 goto wake_up;
1887
1888 #ifdef CONFIG_PM
1889 if (suspended)
1890 local->resuming = true;
1891
1892 if (local->wowlan) {
1893 /*
1894 * In the wowlan case, both mac80211 and the device
1895 * are functional when the resume op is called, so
1896 * clear local->suspended so the device could operate
1897 * normally (e.g. pass rx frames).
1898 */
1899 local->suspended = false;
1900 res = drv_resume(local);
1901 local->wowlan = false;
1902 if (res < 0) {
1903 local->resuming = false;
1904 return res;
1905 }
1906 if (res == 0)
1907 goto wake_up;
1908 WARN_ON(res > 1);
1909 /*
1910 * res is 1, which means the driver requested
1911 * to go through a regular reset on wakeup.
1912 * restore local->suspended in this case.
1913 */
1914 reconfig_due_to_wowlan = true;
1915 local->suspended = true;
1916 }
1917 #endif
1918
1919 /*
1920 * In case of hw_restart during suspend (without wowlan),
1921 * cancel restart work, as we are reconfiguring the device
1922 * anyway.
1923 * Note that restart_work is scheduled on a frozen workqueue,
1924 * so we can't deadlock in this case.
1925 */
1926 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1927 cancel_work_sync(&local->restart_work);
1928
1929 local->started = false;
1930
1931 /*
1932 * Upon resume hardware can sometimes be goofy due to
1933 * various platform / driver / bus issues, so restarting
1934 * the device may at times not work immediately. Propagate
1935 * the error.
1936 */
1937 res = drv_start(local);
1938 if (res) {
1939 if (suspended)
1940 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1941 else
1942 WARN(1, "Hardware became unavailable during restart.\n");
1943 ieee80211_handle_reconfig_failure(local);
1944 return res;
1945 }
1946
1947 /* setup fragmentation threshold */
1948 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1949
1950 /* setup RTS threshold */
1951 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1952
1953 /* reset coverage class */
1954 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1955
1956 ieee80211_led_radio(local, true);
1957 ieee80211_mod_tpt_led_trig(local,
1958 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1959
1960 /* add interfaces */
1961 sdata = rtnl_dereference(local->monitor_sdata);
1962 if (sdata) {
1963 /* in HW restart it exists already */
1964 WARN_ON(local->resuming);
1965 res = drv_add_interface(local, sdata);
1966 if (WARN_ON(res)) {
1967 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1968 synchronize_net();
1969 kfree(sdata);
1970 }
1971 }
1972
1973 list_for_each_entry(sdata, &local->interfaces, list) {
1974 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1975 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1976 ieee80211_sdata_running(sdata)) {
1977 res = drv_add_interface(local, sdata);
1978 if (WARN_ON(res))
1979 break;
1980 }
1981 }
1982
1983 /* If adding any of the interfaces failed above, roll back and
1984 * report failure.
1985 */
1986 if (res) {
1987 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1988 list)
1989 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1990 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1991 ieee80211_sdata_running(sdata))
1992 drv_remove_interface(local, sdata);
1993 ieee80211_handle_reconfig_failure(local);
1994 return res;
1995 }
1996
1997 /* add channel contexts */
1998 if (local->use_chanctx) {
1999 mutex_lock(&local->chanctx_mtx);
2000 list_for_each_entry(ctx, &local->chanctx_list, list)
2001 if (ctx->replace_state !=
2002 IEEE80211_CHANCTX_REPLACES_OTHER)
2003 WARN_ON(drv_add_chanctx(local, ctx));
2004 mutex_unlock(&local->chanctx_mtx);
2005
2006 sdata = rtnl_dereference(local->monitor_sdata);
2007 if (sdata && ieee80211_sdata_running(sdata))
2008 ieee80211_assign_chanctx(local, sdata);
2009 }
2010
2011 /* reconfigure hardware */
2012 ieee80211_hw_config(local, ~0);
2013
2014 ieee80211_configure_filter(local);
2015
2016 /* Finally also reconfigure all the BSS information */
2017 list_for_each_entry(sdata, &local->interfaces, list) {
2018 u32 changed;
2019
2020 if (!ieee80211_sdata_running(sdata))
2021 continue;
2022
2023 ieee80211_assign_chanctx(local, sdata);
2024
2025 switch (sdata->vif.type) {
2026 case NL80211_IFTYPE_AP_VLAN:
2027 case NL80211_IFTYPE_MONITOR:
2028 break;
2029 case NL80211_IFTYPE_ADHOC:
2030 if (sdata->vif.bss_conf.ibss_joined)
2031 WARN_ON(drv_join_ibss(local, sdata));
2032 /* fall through */
2033 default:
2034 ieee80211_reconfig_stations(sdata);
2035 /* fall through */
2036 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2037 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2038 drv_conf_tx(local, sdata, i,
2039 &sdata->tx_conf[i]);
2040 break;
2041 }
2042
2043 /* common change flags for all interface types */
2044 changed = BSS_CHANGED_ERP_CTS_PROT |
2045 BSS_CHANGED_ERP_PREAMBLE |
2046 BSS_CHANGED_ERP_SLOT |
2047 BSS_CHANGED_HT |
2048 BSS_CHANGED_BASIC_RATES |
2049 BSS_CHANGED_BEACON_INT |
2050 BSS_CHANGED_BSSID |
2051 BSS_CHANGED_CQM |
2052 BSS_CHANGED_QOS |
2053 BSS_CHANGED_IDLE |
2054 BSS_CHANGED_TXPOWER |
2055 BSS_CHANGED_MCAST_RATE;
2056
2057 if (sdata->vif.mu_mimo_owner)
2058 changed |= BSS_CHANGED_MU_GROUPS;
2059
2060 switch (sdata->vif.type) {
2061 case NL80211_IFTYPE_STATION:
2062 changed |= BSS_CHANGED_ASSOC |
2063 BSS_CHANGED_ARP_FILTER |
2064 BSS_CHANGED_PS;
2065
2066 /* Re-send beacon info report to the driver */
2067 if (sdata->u.mgd.have_beacon)
2068 changed |= BSS_CHANGED_BEACON_INFO;
2069
2070 if (sdata->vif.bss_conf.max_idle_period ||
2071 sdata->vif.bss_conf.protected_keep_alive)
2072 changed |= BSS_CHANGED_KEEP_ALIVE;
2073
2074 sdata_lock(sdata);
2075 ieee80211_bss_info_change_notify(sdata, changed);
2076 sdata_unlock(sdata);
2077 break;
2078 case NL80211_IFTYPE_OCB:
2079 changed |= BSS_CHANGED_OCB;
2080 ieee80211_bss_info_change_notify(sdata, changed);
2081 break;
2082 case NL80211_IFTYPE_ADHOC:
2083 changed |= BSS_CHANGED_IBSS;
2084 /* fall through */
2085 case NL80211_IFTYPE_AP:
2086 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2087
2088 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2089 changed |= BSS_CHANGED_AP_PROBE_RESP;
2090
2091 if (rcu_access_pointer(sdata->u.ap.beacon))
2092 drv_start_ap(local, sdata);
2093 }
2094
2095 /* fall through */
2096 case NL80211_IFTYPE_MESH_POINT:
2097 if (sdata->vif.bss_conf.enable_beacon) {
2098 changed |= BSS_CHANGED_BEACON |
2099 BSS_CHANGED_BEACON_ENABLED;
2100 ieee80211_bss_info_change_notify(sdata, changed);
2101 }
2102 break;
2103 case NL80211_IFTYPE_NAN:
2104 res = ieee80211_reconfig_nan(sdata);
2105 if (res < 0) {
2106 ieee80211_handle_reconfig_failure(local);
2107 return res;
2108 }
2109 break;
2110 case NL80211_IFTYPE_WDS:
2111 case NL80211_IFTYPE_AP_VLAN:
2112 case NL80211_IFTYPE_MONITOR:
2113 case NL80211_IFTYPE_P2P_DEVICE:
2114 /* nothing to do */
2115 break;
2116 case NL80211_IFTYPE_UNSPECIFIED:
2117 case NUM_NL80211_IFTYPES:
2118 case NL80211_IFTYPE_P2P_CLIENT:
2119 case NL80211_IFTYPE_P2P_GO:
2120 WARN_ON(1);
2121 break;
2122 }
2123 }
2124
2125 ieee80211_recalc_ps(local);
2126
2127 /*
2128 * The sta might be in psm against the ap (e.g. because
2129 * this was the state before a hw restart), so we
2130 * explicitly send a null packet in order to make sure
2131 * it'll sync against the ap (and get out of psm).
2132 */
2133 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2134 list_for_each_entry(sdata, &local->interfaces, list) {
2135 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2136 continue;
2137 if (!sdata->u.mgd.associated)
2138 continue;
2139
2140 ieee80211_send_nullfunc(local, sdata, false);
2141 }
2142 }
2143
2144 /* APs are now beaconing, add back stations */
2145 mutex_lock(&local->sta_mtx);
2146 list_for_each_entry(sta, &local->sta_list, list) {
2147 enum ieee80211_sta_state state;
2148
2149 if (!sta->uploaded)
2150 continue;
2151
2152 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2153 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2154 continue;
2155
2156 for (state = IEEE80211_STA_NOTEXIST;
2157 state < sta->sta_state; state++)
2158 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2159 state + 1));
2160 }
2161 mutex_unlock(&local->sta_mtx);
2162
2163 /* add back keys */
2164 list_for_each_entry(sdata, &local->interfaces, list)
2165 ieee80211_reset_crypto_tx_tailroom(sdata);
2166
2167 list_for_each_entry(sdata, &local->interfaces, list)
2168 if (ieee80211_sdata_running(sdata))
2169 ieee80211_enable_keys(sdata);
2170
2171 /* Reconfigure sched scan if it was interrupted by FW restart */
2172 mutex_lock(&local->mtx);
2173 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2174 lockdep_is_held(&local->mtx));
2175 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2176 lockdep_is_held(&local->mtx));
2177 if (sched_scan_sdata && sched_scan_req)
2178 /*
2179 * Sched scan stopped, but we don't want to report it. Instead,
2180 * we're trying to reschedule. However, if more than one scan
2181 * plan was set, we cannot reschedule since we don't know which
2182 * scan plan was currently running (and some scan plans may have
2183 * already finished).
2184 */
2185 if (sched_scan_req->n_scan_plans > 1 ||
2186 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2187 sched_scan_req)) {
2188 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2189 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2190 sched_scan_stopped = true;
2191 }
2192 mutex_unlock(&local->mtx);
2193
2194 if (sched_scan_stopped)
2195 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2196
2197 wake_up:
2198
2199 if (local->monitors == local->open_count && local->monitors > 0)
2200 ieee80211_add_virtual_monitor(local);
2201
2202 /*
2203 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2204 * sessions can be established after a resume.
2205 *
2206 * Also tear down aggregation sessions since reconfiguring
2207 * them in a hardware restart scenario is not easily done
2208 * right now, and the hardware will have lost information
2209 * about the sessions, but we and the AP still think they
2210 * are active. This is really a workaround though.
2211 */
2212 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2213 mutex_lock(&local->sta_mtx);
2214
2215 list_for_each_entry(sta, &local->sta_list, list) {
2216 if (!local->resuming)
2217 ieee80211_sta_tear_down_BA_sessions(
2218 sta, AGG_STOP_LOCAL_REQUEST);
2219 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2220 }
2221
2222 mutex_unlock(&local->sta_mtx);
2223 }
2224
2225 if (local->in_reconfig) {
2226 local->in_reconfig = false;
2227 barrier();
2228
2229 /* Restart deferred ROCs */
2230 mutex_lock(&local->mtx);
2231 ieee80211_start_next_roc(local);
2232 mutex_unlock(&local->mtx);
2233
2234 /* Requeue all works */
2235 list_for_each_entry(sdata, &local->interfaces, list)
2236 ieee80211_queue_work(&local->hw, &sdata->work);
2237 }
2238
2239 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2240 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2241 false);
2242
2243 /*
2244 * If this is for hw restart things are still running.
2245 * We may want to change that later, however.
2246 */
2247 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2248 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2249
2250 if (!suspended)
2251 return 0;
2252
2253 #ifdef CONFIG_PM
2254 /* first set suspended false, then resuming */
2255 local->suspended = false;
2256 mb();
2257 local->resuming = false;
2258
2259 ieee80211_flush_completed_scan(local, false);
2260
2261 if (local->open_count && !reconfig_due_to_wowlan)
2262 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2263
2264 list_for_each_entry(sdata, &local->interfaces, list) {
2265 if (!ieee80211_sdata_running(sdata))
2266 continue;
2267 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2268 ieee80211_sta_restart(sdata);
2269 }
2270
2271 mod_timer(&local->sta_cleanup, jiffies + 1);
2272 #else
2273 WARN_ON(1);
2274 #endif
2275
2276 return 0;
2277 }
2278
2279 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2280 {
2281 struct ieee80211_sub_if_data *sdata;
2282 struct ieee80211_local *local;
2283 struct ieee80211_key *key;
2284
2285 if (WARN_ON(!vif))
2286 return;
2287
2288 sdata = vif_to_sdata(vif);
2289 local = sdata->local;
2290
2291 if (WARN_ON(!local->resuming))
2292 return;
2293
2294 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2295 return;
2296
2297 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2298
2299 mutex_lock(&local->key_mtx);
2300 list_for_each_entry(key, &sdata->key_list, list)
2301 key->flags |= KEY_FLAG_TAINTED;
2302 mutex_unlock(&local->key_mtx);
2303 }
2304 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2305
2306 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2307 {
2308 struct ieee80211_local *local = sdata->local;
2309 struct ieee80211_chanctx_conf *chanctx_conf;
2310 struct ieee80211_chanctx *chanctx;
2311
2312 mutex_lock(&local->chanctx_mtx);
2313
2314 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2315 lockdep_is_held(&local->chanctx_mtx));
2316
2317 /*
2318 * This function can be called from a work, thus it may be possible
2319 * that the chanctx_conf is removed (due to a disconnection, for
2320 * example).
2321 * So nothing should be done in such case.
2322 */
2323 if (!chanctx_conf)
2324 goto unlock;
2325
2326 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2327 ieee80211_recalc_smps_chanctx(local, chanctx);
2328 unlock:
2329 mutex_unlock(&local->chanctx_mtx);
2330 }
2331
2332 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2333 {
2334 struct ieee80211_local *local = sdata->local;
2335 struct ieee80211_chanctx_conf *chanctx_conf;
2336 struct ieee80211_chanctx *chanctx;
2337
2338 mutex_lock(&local->chanctx_mtx);
2339
2340 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2341 lockdep_is_held(&local->chanctx_mtx));
2342
2343 if (WARN_ON_ONCE(!chanctx_conf))
2344 goto unlock;
2345
2346 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2347 ieee80211_recalc_chanctx_min_def(local, chanctx);
2348 unlock:
2349 mutex_unlock(&local->chanctx_mtx);
2350 }
2351
2352 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2353 {
2354 size_t pos = offset;
2355
2356 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2357 pos += 2 + ies[pos + 1];
2358
2359 return pos;
2360 }
2361
2362 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2363 int rssi_min_thold,
2364 int rssi_max_thold)
2365 {
2366 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2367
2368 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2369 return;
2370
2371 /*
2372 * Scale up threshold values before storing it, as the RSSI averaging
2373 * algorithm uses a scaled up value as well. Change this scaling
2374 * factor if the RSSI averaging algorithm changes.
2375 */
2376 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2377 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2378 }
2379
2380 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2381 int rssi_min_thold,
2382 int rssi_max_thold)
2383 {
2384 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2385
2386 WARN_ON(rssi_min_thold == rssi_max_thold ||
2387 rssi_min_thold > rssi_max_thold);
2388
2389 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2390 rssi_max_thold);
2391 }
2392 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2393
2394 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2395 {
2396 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2397
2398 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2399 }
2400 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2401
2402 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2403 u16 cap)
2404 {
2405 __le16 tmp;
2406
2407 *pos++ = WLAN_EID_HT_CAPABILITY;
2408 *pos++ = sizeof(struct ieee80211_ht_cap);
2409 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2410
2411 /* capability flags */
2412 tmp = cpu_to_le16(cap);
2413 memcpy(pos, &tmp, sizeof(u16));
2414 pos += sizeof(u16);
2415
2416 /* AMPDU parameters */
2417 *pos++ = ht_cap->ampdu_factor |
2418 (ht_cap->ampdu_density <<
2419 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2420
2421 /* MCS set */
2422 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2423 pos += sizeof(ht_cap->mcs);
2424
2425 /* extended capabilities */
2426 pos += sizeof(__le16);
2427
2428 /* BF capabilities */
2429 pos += sizeof(__le32);
2430
2431 /* antenna selection */
2432 pos += sizeof(u8);
2433
2434 return pos;
2435 }
2436
2437 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2438 u32 cap)
2439 {
2440 __le32 tmp;
2441
2442 *pos++ = WLAN_EID_VHT_CAPABILITY;
2443 *pos++ = sizeof(struct ieee80211_vht_cap);
2444 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2445
2446 /* capability flags */
2447 tmp = cpu_to_le32(cap);
2448 memcpy(pos, &tmp, sizeof(u32));
2449 pos += sizeof(u32);
2450
2451 /* VHT MCS set */
2452 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2453 pos += sizeof(vht_cap->vht_mcs);
2454
2455 return pos;
2456 }
2457
2458 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2459 const struct ieee80211_sta_he_cap *he_cap,
2460 u8 *end)
2461 {
2462 u8 n;
2463 u8 ie_len;
2464 u8 *orig_pos = pos;
2465
2466 /* Make sure we have place for the IE */
2467 /*
2468 * TODO: the 1 added is because this temporarily is under the EXTENSION
2469 * IE. Get rid of it when it moves.
2470 */
2471 if (!he_cap)
2472 return orig_pos;
2473
2474 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2475 ie_len = 2 + 1 +
2476 sizeof(he_cap->he_cap_elem) + n +
2477 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2478 he_cap->he_cap_elem.phy_cap_info);
2479
2480 if ((end - pos) < ie_len)
2481 return orig_pos;
2482
2483 *pos++ = WLAN_EID_EXTENSION;
2484 pos++; /* We'll set the size later below */
2485 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2486
2487 /* Fixed data */
2488 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2489 pos += sizeof(he_cap->he_cap_elem);
2490
2491 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2492 pos += n;
2493
2494 /* Check if PPE Threshold should be present */
2495 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2496 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2497 goto end;
2498
2499 /*
2500 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2501 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2502 */
2503 n = hweight8(he_cap->ppe_thres[0] &
2504 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2505 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2506 IEEE80211_PPE_THRES_NSS_POS));
2507
2508 /*
2509 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2510 * total size.
2511 */
2512 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2513 n = DIV_ROUND_UP(n, 8);
2514
2515 /* Copy PPE Thresholds */
2516 memcpy(pos, &he_cap->ppe_thres, n);
2517 pos += n;
2518
2519 end:
2520 orig_pos[1] = (pos - orig_pos) - 2;
2521 return pos;
2522 }
2523
2524 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2525 const struct cfg80211_chan_def *chandef,
2526 u16 prot_mode, bool rifs_mode)
2527 {
2528 struct ieee80211_ht_operation *ht_oper;
2529 /* Build HT Information */
2530 *pos++ = WLAN_EID_HT_OPERATION;
2531 *pos++ = sizeof(struct ieee80211_ht_operation);
2532 ht_oper = (struct ieee80211_ht_operation *)pos;
2533 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2534 chandef->chan->center_freq);
2535 switch (chandef->width) {
2536 case NL80211_CHAN_WIDTH_160:
2537 case NL80211_CHAN_WIDTH_80P80:
2538 case NL80211_CHAN_WIDTH_80:
2539 case NL80211_CHAN_WIDTH_40:
2540 if (chandef->center_freq1 > chandef->chan->center_freq)
2541 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2542 else
2543 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2544 break;
2545 default:
2546 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2547 break;
2548 }
2549 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2550 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2551 chandef->width != NL80211_CHAN_WIDTH_20)
2552 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2553
2554 if (rifs_mode)
2555 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2556
2557 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2558 ht_oper->stbc_param = 0x0000;
2559
2560 /* It seems that Basic MCS set and Supported MCS set
2561 are identical for the first 10 bytes */
2562 memset(&ht_oper->basic_set, 0, 16);
2563 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2564
2565 return pos + sizeof(struct ieee80211_ht_operation);
2566 }
2567
2568 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2569 const struct cfg80211_chan_def *chandef)
2570 {
2571 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2572 *pos++ = 3; /* IE length */
2573 /* New channel width */
2574 switch (chandef->width) {
2575 case NL80211_CHAN_WIDTH_80:
2576 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2577 break;
2578 case NL80211_CHAN_WIDTH_160:
2579 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2580 break;
2581 case NL80211_CHAN_WIDTH_80P80:
2582 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2583 break;
2584 default:
2585 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2586 }
2587
2588 /* new center frequency segment 0 */
2589 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2590 /* new center frequency segment 1 */
2591 if (chandef->center_freq2)
2592 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2593 else
2594 *pos++ = 0;
2595 }
2596
2597 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2598 const struct cfg80211_chan_def *chandef)
2599 {
2600 struct ieee80211_vht_operation *vht_oper;
2601
2602 *pos++ = WLAN_EID_VHT_OPERATION;
2603 *pos++ = sizeof(struct ieee80211_vht_operation);
2604 vht_oper = (struct ieee80211_vht_operation *)pos;
2605 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2606 chandef->center_freq1);
2607 if (chandef->center_freq2)
2608 vht_oper->center_freq_seg1_idx =
2609 ieee80211_frequency_to_channel(chandef->center_freq2);
2610 else
2611 vht_oper->center_freq_seg1_idx = 0x00;
2612
2613 switch (chandef->width) {
2614 case NL80211_CHAN_WIDTH_160:
2615 /*
2616 * Convert 160 MHz channel width to new style as interop
2617 * workaround.
2618 */
2619 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2620 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2621 if (chandef->chan->center_freq < chandef->center_freq1)
2622 vht_oper->center_freq_seg0_idx -= 8;
2623 else
2624 vht_oper->center_freq_seg0_idx += 8;
2625 break;
2626 case NL80211_CHAN_WIDTH_80P80:
2627 /*
2628 * Convert 80+80 MHz channel width to new style as interop
2629 * workaround.
2630 */
2631 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2632 break;
2633 case NL80211_CHAN_WIDTH_80:
2634 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2635 break;
2636 default:
2637 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2638 break;
2639 }
2640
2641 /* don't require special VHT peer rates */
2642 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2643
2644 return pos + sizeof(struct ieee80211_vht_operation);
2645 }
2646
2647 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2648 struct cfg80211_chan_def *chandef)
2649 {
2650 enum nl80211_channel_type channel_type;
2651
2652 if (!ht_oper)
2653 return false;
2654
2655 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2656 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2657 channel_type = NL80211_CHAN_HT20;
2658 break;
2659 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2660 channel_type = NL80211_CHAN_HT40PLUS;
2661 break;
2662 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2663 channel_type = NL80211_CHAN_HT40MINUS;
2664 break;
2665 default:
2666 channel_type = NL80211_CHAN_NO_HT;
2667 return false;
2668 }
2669
2670 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2671 return true;
2672 }
2673
2674 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2675 struct cfg80211_chan_def *chandef)
2676 {
2677 struct cfg80211_chan_def new = *chandef;
2678 int cf1, cf2;
2679
2680 if (!oper)
2681 return false;
2682
2683 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2684 chandef->chan->band);
2685 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2686 chandef->chan->band);
2687
2688 switch (oper->chan_width) {
2689 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2690 break;
2691 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2692 new.width = NL80211_CHAN_WIDTH_80;
2693 new.center_freq1 = cf1;
2694 /* If needed, adjust based on the newer interop workaround. */
2695 if (oper->center_freq_seg1_idx) {
2696 unsigned int diff;
2697
2698 diff = abs(oper->center_freq_seg1_idx -
2699 oper->center_freq_seg0_idx);
2700 if (diff == 8) {
2701 new.width = NL80211_CHAN_WIDTH_160;
2702 new.center_freq1 = cf2;
2703 } else if (diff > 8) {
2704 new.width = NL80211_CHAN_WIDTH_80P80;
2705 new.center_freq2 = cf2;
2706 }
2707 }
2708 break;
2709 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2710 new.width = NL80211_CHAN_WIDTH_160;
2711 new.center_freq1 = cf1;
2712 break;
2713 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2714 new.width = NL80211_CHAN_WIDTH_80P80;
2715 new.center_freq1 = cf1;
2716 new.center_freq2 = cf2;
2717 break;
2718 default:
2719 return false;
2720 }
2721
2722 if (!cfg80211_chandef_valid(&new))
2723 return false;
2724
2725 *chandef = new;
2726 return true;
2727 }
2728
2729 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2730 const struct ieee80211_supported_band *sband,
2731 const u8 *srates, int srates_len, u32 *rates)
2732 {
2733 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2734 int shift = ieee80211_chandef_get_shift(chandef);
2735 struct ieee80211_rate *br;
2736 int brate, rate, i, j, count = 0;
2737
2738 *rates = 0;
2739
2740 for (i = 0; i < srates_len; i++) {
2741 rate = srates[i] & 0x7f;
2742
2743 for (j = 0; j < sband->n_bitrates; j++) {
2744 br = &sband->bitrates[j];
2745 if ((rate_flags & br->flags) != rate_flags)
2746 continue;
2747
2748 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2749 if (brate == rate) {
2750 *rates |= BIT(j);
2751 count++;
2752 break;
2753 }
2754 }
2755 }
2756 return count;
2757 }
2758
2759 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2760 struct sk_buff *skb, bool need_basic,
2761 enum nl80211_band band)
2762 {
2763 struct ieee80211_local *local = sdata->local;
2764 struct ieee80211_supported_band *sband;
2765 int rate, shift;
2766 u8 i, rates, *pos;
2767 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2768 u32 rate_flags;
2769
2770 shift = ieee80211_vif_get_shift(&sdata->vif);
2771 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2772 sband = local->hw.wiphy->bands[band];
2773 rates = 0;
2774 for (i = 0; i < sband->n_bitrates; i++) {
2775 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2776 continue;
2777 rates++;
2778 }
2779 if (rates > 8)
2780 rates = 8;
2781
2782 if (skb_tailroom(skb) < rates + 2)
2783 return -ENOMEM;
2784
2785 pos = skb_put(skb, rates + 2);
2786 *pos++ = WLAN_EID_SUPP_RATES;
2787 *pos++ = rates;
2788 for (i = 0; i < rates; i++) {
2789 u8 basic = 0;
2790 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2791 continue;
2792
2793 if (need_basic && basic_rates & BIT(i))
2794 basic = 0x80;
2795 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2796 5 * (1 << shift));
2797 *pos++ = basic | (u8) rate;
2798 }
2799
2800 return 0;
2801 }
2802
2803 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2804 struct sk_buff *skb, bool need_basic,
2805 enum nl80211_band band)
2806 {
2807 struct ieee80211_local *local = sdata->local;
2808 struct ieee80211_supported_band *sband;
2809 int rate, shift;
2810 u8 i, exrates, *pos;
2811 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2812 u32 rate_flags;
2813
2814 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2815 shift = ieee80211_vif_get_shift(&sdata->vif);
2816
2817 sband = local->hw.wiphy->bands[band];
2818 exrates = 0;
2819 for (i = 0; i < sband->n_bitrates; i++) {
2820 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2821 continue;
2822 exrates++;
2823 }
2824
2825 if (exrates > 8)
2826 exrates -= 8;
2827 else
2828 exrates = 0;
2829
2830 if (skb_tailroom(skb) < exrates + 2)
2831 return -ENOMEM;
2832
2833 if (exrates) {
2834 pos = skb_put(skb, exrates + 2);
2835 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2836 *pos++ = exrates;
2837 for (i = 8; i < sband->n_bitrates; i++) {
2838 u8 basic = 0;
2839 if ((rate_flags & sband->bitrates[i].flags)
2840 != rate_flags)
2841 continue;
2842 if (need_basic && basic_rates & BIT(i))
2843 basic = 0x80;
2844 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2845 5 * (1 << shift));
2846 *pos++ = basic | (u8) rate;
2847 }
2848 }
2849 return 0;
2850 }
2851
2852 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2853 {
2854 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2855 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2856
2857 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2858 /* non-managed type inferfaces */
2859 return 0;
2860 }
2861 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2862 }
2863 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2864
2865 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2866 {
2867 if (!mcs)
2868 return 1;
2869
2870 /* TODO: consider rx_highest */
2871
2872 if (mcs->rx_mask[3])
2873 return 4;
2874 if (mcs->rx_mask[2])
2875 return 3;
2876 if (mcs->rx_mask[1])
2877 return 2;
2878 return 1;
2879 }
2880
2881 /**
2882 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2883 * @local: mac80211 hw info struct
2884 * @status: RX status
2885 * @mpdu_len: total MPDU length (including FCS)
2886 * @mpdu_offset: offset into MPDU to calculate timestamp at
2887 *
2888 * This function calculates the RX timestamp at the given MPDU offset, taking
2889 * into account what the RX timestamp was. An offset of 0 will just normalize
2890 * the timestamp to TSF at beginning of MPDU reception.
2891 */
2892 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2893 struct ieee80211_rx_status *status,
2894 unsigned int mpdu_len,
2895 unsigned int mpdu_offset)
2896 {
2897 u64 ts = status->mactime;
2898 struct rate_info ri;
2899 u16 rate;
2900
2901 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2902 return 0;
2903
2904 memset(&ri, 0, sizeof(ri));
2905
2906 ri.bw = status->bw;
2907
2908 /* Fill cfg80211 rate info */
2909 switch (status->encoding) {
2910 case RX_ENC_HT:
2911 ri.mcs = status->rate_idx;
2912 ri.flags |= RATE_INFO_FLAGS_MCS;
2913 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2914 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2915 break;
2916 case RX_ENC_VHT:
2917 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2918 ri.mcs = status->rate_idx;
2919 ri.nss = status->nss;
2920 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2921 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2922 break;
2923 default:
2924 WARN_ON(1);
2925 /* fall through */
2926 case RX_ENC_LEGACY: {
2927 struct ieee80211_supported_band *sband;
2928 int shift = 0;
2929 int bitrate;
2930
2931 switch (status->bw) {
2932 case RATE_INFO_BW_10:
2933 shift = 1;
2934 break;
2935 case RATE_INFO_BW_5:
2936 shift = 2;
2937 break;
2938 }
2939
2940 sband = local->hw.wiphy->bands[status->band];
2941 bitrate = sband->bitrates[status->rate_idx].bitrate;
2942 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2943
2944 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2945 /* TODO: handle HT/VHT preambles */
2946 if (status->band == NL80211_BAND_5GHZ) {
2947 ts += 20 << shift;
2948 mpdu_offset += 2;
2949 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2950 ts += 96;
2951 } else {
2952 ts += 192;
2953 }
2954 }
2955 break;
2956 }
2957 }
2958
2959 rate = cfg80211_calculate_bitrate(&ri);
2960 if (WARN_ONCE(!rate,
2961 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2962 (unsigned long long)status->flag, status->rate_idx,
2963 status->nss))
2964 return 0;
2965
2966 /* rewind from end of MPDU */
2967 if (status->flag & RX_FLAG_MACTIME_END)
2968 ts -= mpdu_len * 8 * 10 / rate;
2969
2970 ts += mpdu_offset * 8 * 10 / rate;
2971
2972 return ts;
2973 }
2974
2975 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2976 {
2977 struct ieee80211_sub_if_data *sdata;
2978 struct cfg80211_chan_def chandef;
2979
2980 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2981 ASSERT_RTNL();
2982
2983 mutex_lock(&local->mtx);
2984 list_for_each_entry(sdata, &local->interfaces, list) {
2985 /* it might be waiting for the local->mtx, but then
2986 * by the time it gets it, sdata->wdev.cac_started
2987 * will no longer be true
2988 */
2989 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2990
2991 if (sdata->wdev.cac_started) {
2992 chandef = sdata->vif.bss_conf.chandef;
2993 ieee80211_vif_release_channel(sdata);
2994 cfg80211_cac_event(sdata->dev,
2995 &chandef,
2996 NL80211_RADAR_CAC_ABORTED,
2997 GFP_KERNEL);
2998 }
2999 }
3000 mutex_unlock(&local->mtx);
3001 }
3002
3003 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3004 {
3005 struct ieee80211_local *local =
3006 container_of(work, struct ieee80211_local, radar_detected_work);
3007 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3008 struct ieee80211_chanctx *ctx;
3009 int num_chanctx = 0;
3010
3011 mutex_lock(&local->chanctx_mtx);
3012 list_for_each_entry(ctx, &local->chanctx_list, list) {
3013 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3014 continue;
3015
3016 num_chanctx++;
3017 chandef = ctx->conf.def;
3018 }
3019 mutex_unlock(&local->chanctx_mtx);
3020
3021 rtnl_lock();
3022 ieee80211_dfs_cac_cancel(local);
3023 rtnl_unlock();
3024
3025 if (num_chanctx > 1)
3026 /* XXX: multi-channel is not supported yet */
3027 WARN_ON(1);
3028 else
3029 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3030 }
3031
3032 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3033 {
3034 struct ieee80211_local *local = hw_to_local(hw);
3035
3036 trace_api_radar_detected(local);
3037
3038 schedule_work(&local->radar_detected_work);
3039 }
3040 EXPORT_SYMBOL(ieee80211_radar_detected);
3041
3042 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3043 {
3044 u32 ret;
3045 int tmp;
3046
3047 switch (c->width) {
3048 case NL80211_CHAN_WIDTH_20:
3049 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3050 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3051 break;
3052 case NL80211_CHAN_WIDTH_40:
3053 c->width = NL80211_CHAN_WIDTH_20;
3054 c->center_freq1 = c->chan->center_freq;
3055 ret = IEEE80211_STA_DISABLE_40MHZ |
3056 IEEE80211_STA_DISABLE_VHT;
3057 break;
3058 case NL80211_CHAN_WIDTH_80:
3059 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3060 /* n_P40 */
3061 tmp /= 2;
3062 /* freq_P40 */
3063 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3064 c->width = NL80211_CHAN_WIDTH_40;
3065 ret = IEEE80211_STA_DISABLE_VHT;
3066 break;
3067 case NL80211_CHAN_WIDTH_80P80:
3068 c->center_freq2 = 0;
3069 c->width = NL80211_CHAN_WIDTH_80;
3070 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3071 IEEE80211_STA_DISABLE_160MHZ;
3072 break;
3073 case NL80211_CHAN_WIDTH_160:
3074 /* n_P20 */
3075 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3076 /* n_P80 */
3077 tmp /= 4;
3078 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3079 c->width = NL80211_CHAN_WIDTH_80;
3080 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3081 IEEE80211_STA_DISABLE_160MHZ;
3082 break;
3083 default:
3084 case NL80211_CHAN_WIDTH_20_NOHT:
3085 WARN_ON_ONCE(1);
3086 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3087 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3088 break;
3089 case NL80211_CHAN_WIDTH_5:
3090 case NL80211_CHAN_WIDTH_10:
3091 WARN_ON_ONCE(1);
3092 /* keep c->width */
3093 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3094 break;
3095 }
3096
3097 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3098
3099 return ret;
3100 }
3101
3102 /*
3103 * Returns true if smps_mode_new is strictly more restrictive than
3104 * smps_mode_old.
3105 */
3106 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3107 enum ieee80211_smps_mode smps_mode_new)
3108 {
3109 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3110 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3111 return false;
3112
3113 switch (smps_mode_old) {
3114 case IEEE80211_SMPS_STATIC:
3115 return false;
3116 case IEEE80211_SMPS_DYNAMIC:
3117 return smps_mode_new == IEEE80211_SMPS_STATIC;
3118 case IEEE80211_SMPS_OFF:
3119 return smps_mode_new != IEEE80211_SMPS_OFF;
3120 default:
3121 WARN_ON(1);
3122 }
3123
3124 return false;
3125 }
3126
3127 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3128 struct cfg80211_csa_settings *csa_settings)
3129 {
3130 struct sk_buff *skb;
3131 struct ieee80211_mgmt *mgmt;
3132 struct ieee80211_local *local = sdata->local;
3133 int freq;
3134 int hdr_len = offsetofend(struct ieee80211_mgmt,
3135 u.action.u.chan_switch);
3136 u8 *pos;
3137
3138 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3139 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3140 return -EOPNOTSUPP;
3141
3142 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3143 5 + /* channel switch announcement element */
3144 3 + /* secondary channel offset element */
3145 5 + /* wide bandwidth channel switch announcement */
3146 8); /* mesh channel switch parameters element */
3147 if (!skb)
3148 return -ENOMEM;
3149
3150 skb_reserve(skb, local->tx_headroom);
3151 mgmt = skb_put_zero(skb, hdr_len);
3152 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3153 IEEE80211_STYPE_ACTION);
3154
3155 eth_broadcast_addr(mgmt->da);
3156 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3157 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3158 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3159 } else {
3160 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3161 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3162 }
3163 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3164 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3165 pos = skb_put(skb, 5);
3166 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3167 *pos++ = 3; /* IE length */
3168 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3169 freq = csa_settings->chandef.chan->center_freq;
3170 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3171 *pos++ = csa_settings->count; /* count */
3172
3173 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3174 enum nl80211_channel_type ch_type;
3175
3176 skb_put(skb, 3);
3177 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3178 *pos++ = 1; /* IE length */
3179 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3180 if (ch_type == NL80211_CHAN_HT40PLUS)
3181 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3182 else
3183 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3184 }
3185
3186 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3187 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3188
3189 skb_put(skb, 8);
3190 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3191 *pos++ = 6; /* IE length */
3192 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3193 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3194 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3195 *pos++ |= csa_settings->block_tx ?
3196 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3197 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3198 pos += 2;
3199 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3200 pos += 2;
3201 }
3202
3203 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3204 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3205 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3206 skb_put(skb, 5);
3207 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3208 }
3209
3210 ieee80211_tx_skb(sdata, skb);
3211 return 0;
3212 }
3213
3214 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3215 {
3216 return !(cs == NULL || cs->cipher == 0 ||
3217 cs->hdr_len < cs->pn_len + cs->pn_off ||
3218 cs->hdr_len <= cs->key_idx_off ||
3219 cs->key_idx_shift > 7 ||
3220 cs->key_idx_mask == 0);
3221 }
3222
3223 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3224 {
3225 int i;
3226
3227 /* Ensure we have enough iftype bitmap space for all iftype values */
3228 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3229
3230 for (i = 0; i < n; i++)
3231 if (!ieee80211_cs_valid(&cs[i]))
3232 return false;
3233
3234 return true;
3235 }
3236
3237 const struct ieee80211_cipher_scheme *
3238 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3239 enum nl80211_iftype iftype)
3240 {
3241 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3242 int n = local->hw.n_cipher_schemes;
3243 int i;
3244 const struct ieee80211_cipher_scheme *cs = NULL;
3245
3246 for (i = 0; i < n; i++) {
3247 if (l[i].cipher == cipher) {
3248 cs = &l[i];
3249 break;
3250 }
3251 }
3252
3253 if (!cs || !(cs->iftype & BIT(iftype)))
3254 return NULL;
3255
3256 return cs;
3257 }
3258
3259 int ieee80211_cs_headroom(struct ieee80211_local *local,
3260 struct cfg80211_crypto_settings *crypto,
3261 enum nl80211_iftype iftype)
3262 {
3263 const struct ieee80211_cipher_scheme *cs;
3264 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3265 int i;
3266
3267 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3268 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3269 iftype);
3270
3271 if (cs && headroom < cs->hdr_len)
3272 headroom = cs->hdr_len;
3273 }
3274
3275 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3276 if (cs && headroom < cs->hdr_len)
3277 headroom = cs->hdr_len;
3278
3279 return headroom;
3280 }
3281
3282 static bool
3283 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3284 {
3285 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3286 int skip;
3287
3288 if (end > 0)
3289 return false;
3290
3291 /* One shot NOA */
3292 if (data->count[i] == 1)
3293 return false;
3294
3295 if (data->desc[i].interval == 0)
3296 return false;
3297
3298 /* End time is in the past, check for repetitions */
3299 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3300 if (data->count[i] < 255) {
3301 if (data->count[i] <= skip) {
3302 data->count[i] = 0;
3303 return false;
3304 }
3305
3306 data->count[i] -= skip;
3307 }
3308
3309 data->desc[i].start += skip * data->desc[i].interval;
3310
3311 return true;
3312 }
3313
3314 static bool
3315 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3316 s32 *offset)
3317 {
3318 bool ret = false;
3319 int i;
3320
3321 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3322 s32 cur;
3323
3324 if (!data->count[i])
3325 continue;
3326
3327 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3328 ret = true;
3329
3330 cur = data->desc[i].start - tsf;
3331 if (cur > *offset)
3332 continue;
3333
3334 cur = data->desc[i].start + data->desc[i].duration - tsf;
3335 if (cur > *offset)
3336 *offset = cur;
3337 }
3338
3339 return ret;
3340 }
3341
3342 static u32
3343 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3344 {
3345 s32 offset = 0;
3346 int tries = 0;
3347 /*
3348 * arbitrary limit, used to avoid infinite loops when combined NoA
3349 * descriptors cover the full time period.
3350 */
3351 int max_tries = 5;
3352
3353 ieee80211_extend_absent_time(data, tsf, &offset);
3354 do {
3355 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3356 break;
3357
3358 tries++;
3359 } while (tries < max_tries);
3360
3361 return offset;
3362 }
3363
3364 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3365 {
3366 u32 next_offset = BIT(31) - 1;
3367 int i;
3368
3369 data->absent = 0;
3370 data->has_next_tsf = false;
3371 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3372 s32 start;
3373
3374 if (!data->count[i])
3375 continue;
3376
3377 ieee80211_extend_noa_desc(data, tsf, i);
3378 start = data->desc[i].start - tsf;
3379 if (start <= 0)
3380 data->absent |= BIT(i);
3381
3382 if (next_offset > start)
3383 next_offset = start;
3384
3385 data->has_next_tsf = true;
3386 }
3387
3388 if (data->absent)
3389 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3390
3391 data->next_tsf = tsf + next_offset;
3392 }
3393 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3394
3395 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3396 struct ieee80211_noa_data *data, u32 tsf)
3397 {
3398 int ret = 0;
3399 int i;
3400
3401 memset(data, 0, sizeof(*data));
3402
3403 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3404 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3405
3406 if (!desc->count || !desc->duration)
3407 continue;
3408
3409 data->count[i] = desc->count;
3410 data->desc[i].start = le32_to_cpu(desc->start_time);
3411 data->desc[i].duration = le32_to_cpu(desc->duration);
3412 data->desc[i].interval = le32_to_cpu(desc->interval);
3413
3414 if (data->count[i] > 1 &&
3415 data->desc[i].interval < data->desc[i].duration)
3416 continue;
3417
3418 ieee80211_extend_noa_desc(data, tsf, i);
3419 ret++;
3420 }
3421
3422 if (ret)
3423 ieee80211_update_p2p_noa(data, tsf);
3424
3425 return ret;
3426 }
3427 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3428
3429 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3430 struct ieee80211_sub_if_data *sdata)
3431 {
3432 u64 tsf = drv_get_tsf(local, sdata);
3433 u64 dtim_count = 0;
3434 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3435 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3436 struct ps_data *ps;
3437 u8 bcns_from_dtim;
3438
3439 if (tsf == -1ULL || !beacon_int || !dtim_period)
3440 return;
3441
3442 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3443 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3444 if (!sdata->bss)
3445 return;
3446
3447 ps = &sdata->bss->ps;
3448 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3449 ps = &sdata->u.mesh.ps;
3450 } else {
3451 return;
3452 }
3453
3454 /*
3455 * actually finds last dtim_count, mac80211 will update in
3456 * __beacon_add_tim().
3457 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3458 */
3459 do_div(tsf, beacon_int);
3460 bcns_from_dtim = do_div(tsf, dtim_period);
3461 /* just had a DTIM */
3462 if (!bcns_from_dtim)
3463 dtim_count = 0;
3464 else
3465 dtim_count = dtim_period - bcns_from_dtim;
3466
3467 ps->dtim_count = dtim_count;
3468 }
3469
3470 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3471 struct ieee80211_chanctx *ctx)
3472 {
3473 struct ieee80211_sub_if_data *sdata;
3474 u8 radar_detect = 0;
3475
3476 lockdep_assert_held(&local->chanctx_mtx);
3477
3478 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3479 return 0;
3480
3481 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3482 if (sdata->reserved_radar_required)
3483 radar_detect |= BIT(sdata->reserved_chandef.width);
3484
3485 /*
3486 * An in-place reservation context should not have any assigned vifs
3487 * until it replaces the other context.
3488 */
3489 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3490 !list_empty(&ctx->assigned_vifs));
3491
3492 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3493 if (sdata->radar_required)
3494 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3495
3496 return radar_detect;
3497 }
3498
3499 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3500 const struct cfg80211_chan_def *chandef,
3501 enum ieee80211_chanctx_mode chanmode,
3502 u8 radar_detect)
3503 {
3504 struct ieee80211_local *local = sdata->local;
3505 struct ieee80211_sub_if_data *sdata_iter;
3506 enum nl80211_iftype iftype = sdata->wdev.iftype;
3507 struct ieee80211_chanctx *ctx;
3508 int total = 1;
3509 struct iface_combination_params params = {
3510 .radar_detect = radar_detect,
3511 };
3512
3513 lockdep_assert_held(&local->chanctx_mtx);
3514
3515 if (WARN_ON(hweight32(radar_detect) > 1))
3516 return -EINVAL;
3517
3518 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3519 !chandef->chan))
3520 return -EINVAL;
3521
3522 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3523 return -EINVAL;
3524
3525 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3526 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3527 /*
3528 * always passing this is harmless, since it'll be the
3529 * same value that cfg80211 finds if it finds the same
3530 * interface ... and that's always allowed
3531 */
3532 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3533 }
3534
3535 /* Always allow software iftypes */
3536 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3537 if (radar_detect)
3538 return -EINVAL;
3539 return 0;
3540 }
3541
3542 if (chandef)
3543 params.num_different_channels = 1;
3544
3545 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3546 params.iftype_num[iftype] = 1;
3547
3548 list_for_each_entry(ctx, &local->chanctx_list, list) {
3549 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3550 continue;
3551 params.radar_detect |=
3552 ieee80211_chanctx_radar_detect(local, ctx);
3553 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3554 params.num_different_channels++;
3555 continue;
3556 }
3557 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3558 cfg80211_chandef_compatible(chandef,
3559 &ctx->conf.def))
3560 continue;
3561 params.num_different_channels++;
3562 }
3563
3564 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3565 struct wireless_dev *wdev_iter;
3566
3567 wdev_iter = &sdata_iter->wdev;
3568
3569 if (sdata_iter == sdata ||
3570 !ieee80211_sdata_running(sdata_iter) ||
3571 cfg80211_iftype_allowed(local->hw.wiphy,
3572 wdev_iter->iftype, 0, 1))
3573 continue;
3574
3575 params.iftype_num[wdev_iter->iftype]++;
3576 total++;
3577 }
3578
3579 if (total == 1 && !params.radar_detect)
3580 return 0;
3581
3582 return cfg80211_check_combinations(local->hw.wiphy, &params);
3583 }
3584
3585 static void
3586 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3587 void *data)
3588 {
3589 u32 *max_num_different_channels = data;
3590
3591 *max_num_different_channels = max(*max_num_different_channels,
3592 c->num_different_channels);
3593 }
3594
3595 int ieee80211_max_num_channels(struct ieee80211_local *local)
3596 {
3597 struct ieee80211_sub_if_data *sdata;
3598 struct ieee80211_chanctx *ctx;
3599 u32 max_num_different_channels = 1;
3600 int err;
3601 struct iface_combination_params params = {0};
3602
3603 lockdep_assert_held(&local->chanctx_mtx);
3604
3605 list_for_each_entry(ctx, &local->chanctx_list, list) {
3606 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3607 continue;
3608
3609 params.num_different_channels++;
3610
3611 params.radar_detect |=
3612 ieee80211_chanctx_radar_detect(local, ctx);
3613 }
3614
3615 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3616 params.iftype_num[sdata->wdev.iftype]++;
3617
3618 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3619 ieee80211_iter_max_chans,
3620 &max_num_different_channels);
3621 if (err < 0)
3622 return err;
3623
3624 return max_num_different_channels;
3625 }
3626
3627 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3628 {
3629 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3630 *buf++ = 7; /* len */
3631 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3632 *buf++ = 0x50;
3633 *buf++ = 0xf2;
3634 *buf++ = 2; /* WME */
3635 *buf++ = 0; /* WME info */
3636 *buf++ = 1; /* WME ver */
3637 *buf++ = qosinfo; /* U-APSD no in use */
3638
3639 return buf;
3640 }
3641
3642 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3643 unsigned long *frame_cnt,
3644 unsigned long *byte_cnt)
3645 {
3646 struct txq_info *txqi = to_txq_info(txq);
3647 u32 frag_cnt = 0, frag_bytes = 0;
3648 struct sk_buff *skb;
3649
3650 skb_queue_walk(&txqi->frags, skb) {
3651 frag_cnt++;
3652 frag_bytes += skb->len;
3653 }
3654
3655 if (frame_cnt)
3656 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3657
3658 if (byte_cnt)
3659 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3660 }
3661 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3662
3663 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3664 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3665 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3666 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3667 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3668 };
Linux with added FPC-III support