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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2015-2017 Intel Deutschland GmbH
9 * Copyright (C) 2018-2021 Intel Corporation
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
16#include <linux/export.h>
17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
22#include <linux/bitmap.h>
23#include <linux/crc32.h>
24#include <net/net_namespace.h>
25#include <net/cfg80211.h>
26#include <net/rtnetlink.h>
27
28#include "ieee80211_i.h"
29#include "driver-ops.h"
30#include "rate.h"
31#include "mesh.h"
32#include "wme.h"
33#include "led.h"
34#include "wep.h"
35
36/* privid for wiphys to determine whether they belong to us or not */
37const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42
43 local = wiphy_priv(wiphy);
44 return &local->hw;
45}
46EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
47
48u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
49 enum nl80211_iftype type)
50{
51 __le16 fc = hdr->frame_control;
52
53 if (ieee80211_is_data(fc)) {
54 if (len < 24) /* drop incorrect hdr len (data) */
55 return NULL;
56
57 if (ieee80211_has_a4(fc))
58 return NULL;
59 if (ieee80211_has_tods(fc))
60 return hdr->addr1;
61 if (ieee80211_has_fromds(fc))
62 return hdr->addr2;
63
64 return hdr->addr3;
65 }
66
67 if (ieee80211_is_s1g_beacon(fc)) {
68 struct ieee80211_ext *ext = (void *) hdr;
69
70 return ext->u.s1g_beacon.sa;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
74 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
76 return hdr->addr3;
77 }
78
79 if (ieee80211_is_ctl(fc)) {
80 if (ieee80211_is_pspoll(fc))
81 return hdr->addr1;
82
83 if (ieee80211_is_back_req(fc)) {
84 switch (type) {
85 case NL80211_IFTYPE_STATION:
86 return hdr->addr2;
87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
89 return hdr->addr1;
90 default:
91 break; /* fall through to the return */
92 }
93 }
94 }
95
96 return NULL;
97}
98EXPORT_SYMBOL(ieee80211_get_bssid);
99
100void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
101{
102 struct sk_buff *skb;
103 struct ieee80211_hdr *hdr;
104
105 skb_queue_walk(&tx->skbs, skb) {
106 hdr = (struct ieee80211_hdr *) skb->data;
107 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
108 }
109}
110
111int ieee80211_frame_duration(enum nl80211_band band, size_t len,
112 int rate, int erp, int short_preamble,
113 int shift)
114{
115 int dur;
116
117 /* calculate duration (in microseconds, rounded up to next higher
118 * integer if it includes a fractional microsecond) to send frame of
119 * len bytes (does not include FCS) at the given rate. Duration will
120 * also include SIFS.
121 *
122 * rate is in 100 kbps, so divident is multiplied by 10 in the
123 * DIV_ROUND_UP() operations.
124 *
125 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
126 * is assumed to be 0 otherwise.
127 */
128
129 if (band == NL80211_BAND_5GHZ || erp) {
130 /*
131 * OFDM:
132 *
133 * N_DBPS = DATARATE x 4
134 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
135 * (16 = SIGNAL time, 6 = tail bits)
136 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
137 *
138 * T_SYM = 4 usec
139 * 802.11a - 18.5.2: aSIFSTime = 16 usec
140 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
141 * signal ext = 6 usec
142 */
143 dur = 16; /* SIFS + signal ext */
144 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
145 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
146
147 /* IEEE 802.11-2012 18.3.2.4: all values above are:
148 * * times 4 for 5 MHz
149 * * times 2 for 10 MHz
150 */
151 dur *= 1 << shift;
152
153 /* rates should already consider the channel bandwidth,
154 * don't apply divisor again.
155 */
156 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
157 4 * rate); /* T_SYM x N_SYM */
158 } else {
159 /*
160 * 802.11b or 802.11g with 802.11b compatibility:
161 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
162 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
163 *
164 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
165 * aSIFSTime = 10 usec
166 * aPreambleLength = 144 usec or 72 usec with short preamble
167 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
168 */
169 dur = 10; /* aSIFSTime = 10 usec */
170 dur += short_preamble ? (72 + 24) : (144 + 48);
171
172 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
173 }
174
175 return dur;
176}
177
178/* Exported duration function for driver use */
179__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
180 struct ieee80211_vif *vif,
181 enum nl80211_band band,
182 size_t frame_len,
183 struct ieee80211_rate *rate)
184{
185 struct ieee80211_sub_if_data *sdata;
186 u16 dur;
187 int erp, shift = 0;
188 bool short_preamble = false;
189
190 erp = 0;
191 if (vif) {
192 sdata = vif_to_sdata(vif);
193 short_preamble = sdata->vif.bss_conf.use_short_preamble;
194 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
195 erp = rate->flags & IEEE80211_RATE_ERP_G;
196 shift = ieee80211_vif_get_shift(vif);
197 }
198
199 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
200 short_preamble, shift);
201
202 return cpu_to_le16(dur);
203}
204EXPORT_SYMBOL(ieee80211_generic_frame_duration);
205
206__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
207 struct ieee80211_vif *vif, size_t frame_len,
208 const struct ieee80211_tx_info *frame_txctl)
209{
210 struct ieee80211_local *local = hw_to_local(hw);
211 struct ieee80211_rate *rate;
212 struct ieee80211_sub_if_data *sdata;
213 bool short_preamble;
214 int erp, shift = 0, bitrate;
215 u16 dur;
216 struct ieee80211_supported_band *sband;
217
218 sband = local->hw.wiphy->bands[frame_txctl->band];
219
220 short_preamble = false;
221
222 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
223
224 erp = 0;
225 if (vif) {
226 sdata = vif_to_sdata(vif);
227 short_preamble = sdata->vif.bss_conf.use_short_preamble;
228 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
229 erp = rate->flags & IEEE80211_RATE_ERP_G;
230 shift = ieee80211_vif_get_shift(vif);
231 }
232
233 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
234
235 /* CTS duration */
236 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
237 erp, short_preamble, shift);
238 /* Data frame duration */
239 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
240 erp, short_preamble, shift);
241 /* ACK duration */
242 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
243 erp, short_preamble, shift);
244
245 return cpu_to_le16(dur);
246}
247EXPORT_SYMBOL(ieee80211_rts_duration);
248
249__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
250 struct ieee80211_vif *vif,
251 size_t frame_len,
252 const struct ieee80211_tx_info *frame_txctl)
253{
254 struct ieee80211_local *local = hw_to_local(hw);
255 struct ieee80211_rate *rate;
256 struct ieee80211_sub_if_data *sdata;
257 bool short_preamble;
258 int erp, shift = 0, bitrate;
259 u16 dur;
260 struct ieee80211_supported_band *sband;
261
262 sband = local->hw.wiphy->bands[frame_txctl->band];
263
264 short_preamble = false;
265
266 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
267 erp = 0;
268 if (vif) {
269 sdata = vif_to_sdata(vif);
270 short_preamble = sdata->vif.bss_conf.use_short_preamble;
271 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
272 erp = rate->flags & IEEE80211_RATE_ERP_G;
273 shift = ieee80211_vif_get_shift(vif);
274 }
275
276 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
277
278 /* Data frame duration */
279 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
280 erp, short_preamble, shift);
281 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
282 /* ACK duration */
283 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
284 erp, short_preamble, shift);
285 }
286
287 return cpu_to_le16(dur);
288}
289EXPORT_SYMBOL(ieee80211_ctstoself_duration);
290
291static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
292{
293 struct ieee80211_local *local = sdata->local;
294 struct ieee80211_vif *vif = &sdata->vif;
295 struct fq *fq = &local->fq;
296 struct ps_data *ps = NULL;
297 struct txq_info *txqi;
298 struct sta_info *sta;
299 int i;
300
301 local_bh_disable();
302 spin_lock(&fq->lock);
303
304 if (sdata->vif.type == NL80211_IFTYPE_AP)
305 ps = &sdata->bss->ps;
306
307 sdata->vif.txqs_stopped[ac] = false;
308
309 list_for_each_entry_rcu(sta, &local->sta_list, list) {
310 if (sdata != sta->sdata)
311 continue;
312
313 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
314 struct ieee80211_txq *txq = sta->sta.txq[i];
315
316 if (!txq)
317 continue;
318
319 txqi = to_txq_info(txq);
320
321 if (ac != txq->ac)
322 continue;
323
324 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
325 &txqi->flags))
326 continue;
327
328 spin_unlock(&fq->lock);
329 drv_wake_tx_queue(local, txqi);
330 spin_lock(&fq->lock);
331 }
332 }
333
334 if (!vif->txq)
335 goto out;
336
337 txqi = to_txq_info(vif->txq);
338
339 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
340 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
341 goto out;
342
343 spin_unlock(&fq->lock);
344
345 drv_wake_tx_queue(local, txqi);
346 local_bh_enable();
347 return;
348out:
349 spin_unlock(&fq->lock);
350 local_bh_enable();
351}
352
353static void
354__releases(&local->queue_stop_reason_lock)
355__acquires(&local->queue_stop_reason_lock)
356_ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
357{
358 struct ieee80211_sub_if_data *sdata;
359 int n_acs = IEEE80211_NUM_ACS;
360 int i;
361
362 rcu_read_lock();
363
364 if (local->hw.queues < IEEE80211_NUM_ACS)
365 n_acs = 1;
366
367 for (i = 0; i < local->hw.queues; i++) {
368 if (local->queue_stop_reasons[i])
369 continue;
370
371 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
372 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
373 int ac;
374
375 for (ac = 0; ac < n_acs; ac++) {
376 int ac_queue = sdata->vif.hw_queue[ac];
377
378 if (ac_queue == i ||
379 sdata->vif.cab_queue == i)
380 __ieee80211_wake_txqs(sdata, ac);
381 }
382 }
383 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
384 }
385
386 rcu_read_unlock();
387}
388
389void ieee80211_wake_txqs(struct tasklet_struct *t)
390{
391 struct ieee80211_local *local = from_tasklet(local, t,
392 wake_txqs_tasklet);
393 unsigned long flags;
394
395 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
396 _ieee80211_wake_txqs(local, &flags);
397 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
398}
399
400void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
401{
402 struct ieee80211_sub_if_data *sdata;
403 int n_acs = IEEE80211_NUM_ACS;
404
405 if (local->ops->wake_tx_queue)
406 return;
407
408 if (local->hw.queues < IEEE80211_NUM_ACS)
409 n_acs = 1;
410
411 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
412 int ac;
413
414 if (!sdata->dev)
415 continue;
416
417 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
418 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
419 continue;
420
421 for (ac = 0; ac < n_acs; ac++) {
422 int ac_queue = sdata->vif.hw_queue[ac];
423
424 if (ac_queue == queue ||
425 (sdata->vif.cab_queue == queue &&
426 local->queue_stop_reasons[ac_queue] == 0 &&
427 skb_queue_empty(&local->pending[ac_queue])))
428 netif_wake_subqueue(sdata->dev, ac);
429 }
430 }
431}
432
433static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
434 enum queue_stop_reason reason,
435 bool refcounted,
436 unsigned long *flags)
437{
438 struct ieee80211_local *local = hw_to_local(hw);
439
440 trace_wake_queue(local, queue, reason);
441
442 if (WARN_ON(queue >= hw->queues))
443 return;
444
445 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
446 return;
447
448 if (!refcounted) {
449 local->q_stop_reasons[queue][reason] = 0;
450 } else {
451 local->q_stop_reasons[queue][reason]--;
452 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
453 local->q_stop_reasons[queue][reason] = 0;
454 }
455
456 if (local->q_stop_reasons[queue][reason] == 0)
457 __clear_bit(reason, &local->queue_stop_reasons[queue]);
458
459 if (local->queue_stop_reasons[queue] != 0)
460 /* someone still has this queue stopped */
461 return;
462
463 if (skb_queue_empty(&local->pending[queue])) {
464 rcu_read_lock();
465 ieee80211_propagate_queue_wake(local, queue);
466 rcu_read_unlock();
467 } else
468 tasklet_schedule(&local->tx_pending_tasklet);
469
470 /*
471 * Calling _ieee80211_wake_txqs here can be a problem because it may
472 * release queue_stop_reason_lock which has been taken by
473 * __ieee80211_wake_queue's caller. It is certainly not very nice to
474 * release someone's lock, but it is fine because all the callers of
475 * __ieee80211_wake_queue call it right before releasing the lock.
476 */
477 if (local->ops->wake_tx_queue) {
478 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
479 tasklet_schedule(&local->wake_txqs_tasklet);
480 else
481 _ieee80211_wake_txqs(local, flags);
482 }
483}
484
485void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
486 enum queue_stop_reason reason,
487 bool refcounted)
488{
489 struct ieee80211_local *local = hw_to_local(hw);
490 unsigned long flags;
491
492 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
493 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
494 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
495}
496
497void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
498{
499 ieee80211_wake_queue_by_reason(hw, queue,
500 IEEE80211_QUEUE_STOP_REASON_DRIVER,
501 false);
502}
503EXPORT_SYMBOL(ieee80211_wake_queue);
504
505static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
506 enum queue_stop_reason reason,
507 bool refcounted)
508{
509 struct ieee80211_local *local = hw_to_local(hw);
510 struct ieee80211_sub_if_data *sdata;
511 int n_acs = IEEE80211_NUM_ACS;
512
513 trace_stop_queue(local, queue, reason);
514
515 if (WARN_ON(queue >= hw->queues))
516 return;
517
518 if (!refcounted)
519 local->q_stop_reasons[queue][reason] = 1;
520 else
521 local->q_stop_reasons[queue][reason]++;
522
523 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
524 return;
525
526 if (local->hw.queues < IEEE80211_NUM_ACS)
527 n_acs = 1;
528
529 rcu_read_lock();
530 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
531 int ac;
532
533 if (!sdata->dev)
534 continue;
535
536 for (ac = 0; ac < n_acs; ac++) {
537 if (sdata->vif.hw_queue[ac] == queue ||
538 sdata->vif.cab_queue == queue) {
539 if (!local->ops->wake_tx_queue) {
540 netif_stop_subqueue(sdata->dev, ac);
541 continue;
542 }
543 spin_lock(&local->fq.lock);
544 sdata->vif.txqs_stopped[ac] = true;
545 spin_unlock(&local->fq.lock);
546 }
547 }
548 }
549 rcu_read_unlock();
550}
551
552void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
553 enum queue_stop_reason reason,
554 bool refcounted)
555{
556 struct ieee80211_local *local = hw_to_local(hw);
557 unsigned long flags;
558
559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
560 __ieee80211_stop_queue(hw, queue, reason, refcounted);
561 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
562}
563
564void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
565{
566 ieee80211_stop_queue_by_reason(hw, queue,
567 IEEE80211_QUEUE_STOP_REASON_DRIVER,
568 false);
569}
570EXPORT_SYMBOL(ieee80211_stop_queue);
571
572void ieee80211_add_pending_skb(struct ieee80211_local *local,
573 struct sk_buff *skb)
574{
575 struct ieee80211_hw *hw = &local->hw;
576 unsigned long flags;
577 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
578 int queue = info->hw_queue;
579
580 if (WARN_ON(!info->control.vif)) {
581 ieee80211_free_txskb(&local->hw, skb);
582 return;
583 }
584
585 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
586 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
587 false);
588 __skb_queue_tail(&local->pending[queue], skb);
589 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
590 false, &flags);
591 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
592}
593
594void ieee80211_add_pending_skbs(struct ieee80211_local *local,
595 struct sk_buff_head *skbs)
596{
597 struct ieee80211_hw *hw = &local->hw;
598 struct sk_buff *skb;
599 unsigned long flags;
600 int queue, i;
601
602 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
603 while ((skb = skb_dequeue(skbs))) {
604 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
605
606 if (WARN_ON(!info->control.vif)) {
607 ieee80211_free_txskb(&local->hw, skb);
608 continue;
609 }
610
611 queue = info->hw_queue;
612
613 __ieee80211_stop_queue(hw, queue,
614 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
615 false);
616
617 __skb_queue_tail(&local->pending[queue], skb);
618 }
619
620 for (i = 0; i < hw->queues; i++)
621 __ieee80211_wake_queue(hw, i,
622 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
623 false, &flags);
624 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
625}
626
627void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
628 unsigned long queues,
629 enum queue_stop_reason reason,
630 bool refcounted)
631{
632 struct ieee80211_local *local = hw_to_local(hw);
633 unsigned long flags;
634 int i;
635
636 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
637
638 for_each_set_bit(i, &queues, hw->queues)
639 __ieee80211_stop_queue(hw, i, reason, refcounted);
640
641 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
642}
643
644void ieee80211_stop_queues(struct ieee80211_hw *hw)
645{
646 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
647 IEEE80211_QUEUE_STOP_REASON_DRIVER,
648 false);
649}
650EXPORT_SYMBOL(ieee80211_stop_queues);
651
652int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
653{
654 struct ieee80211_local *local = hw_to_local(hw);
655 unsigned long flags;
656 int ret;
657
658 if (WARN_ON(queue >= hw->queues))
659 return true;
660
661 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
662 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
663 &local->queue_stop_reasons[queue]);
664 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
665 return ret;
666}
667EXPORT_SYMBOL(ieee80211_queue_stopped);
668
669void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
670 unsigned long queues,
671 enum queue_stop_reason reason,
672 bool refcounted)
673{
674 struct ieee80211_local *local = hw_to_local(hw);
675 unsigned long flags;
676 int i;
677
678 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
679
680 for_each_set_bit(i, &queues, hw->queues)
681 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
682
683 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
684}
685
686void ieee80211_wake_queues(struct ieee80211_hw *hw)
687{
688 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
689 IEEE80211_QUEUE_STOP_REASON_DRIVER,
690 false);
691}
692EXPORT_SYMBOL(ieee80211_wake_queues);
693
694static unsigned int
695ieee80211_get_vif_queues(struct ieee80211_local *local,
696 struct ieee80211_sub_if_data *sdata)
697{
698 unsigned int queues;
699
700 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
701 int ac;
702
703 queues = 0;
704
705 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
706 queues |= BIT(sdata->vif.hw_queue[ac]);
707 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
708 queues |= BIT(sdata->vif.cab_queue);
709 } else {
710 /* all queues */
711 queues = BIT(local->hw.queues) - 1;
712 }
713
714 return queues;
715}
716
717void __ieee80211_flush_queues(struct ieee80211_local *local,
718 struct ieee80211_sub_if_data *sdata,
719 unsigned int queues, bool drop)
720{
721 if (!local->ops->flush)
722 return;
723
724 /*
725 * If no queue was set, or if the HW doesn't support
726 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
727 */
728 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
729 queues = ieee80211_get_vif_queues(local, sdata);
730
731 ieee80211_stop_queues_by_reason(&local->hw, queues,
732 IEEE80211_QUEUE_STOP_REASON_FLUSH,
733 false);
734
735 drv_flush(local, sdata, queues, drop);
736
737 ieee80211_wake_queues_by_reason(&local->hw, queues,
738 IEEE80211_QUEUE_STOP_REASON_FLUSH,
739 false);
740}
741
742void ieee80211_flush_queues(struct ieee80211_local *local,
743 struct ieee80211_sub_if_data *sdata, bool drop)
744{
745 __ieee80211_flush_queues(local, sdata, 0, drop);
746}
747
748void ieee80211_stop_vif_queues(struct ieee80211_local *local,
749 struct ieee80211_sub_if_data *sdata,
750 enum queue_stop_reason reason)
751{
752 ieee80211_stop_queues_by_reason(&local->hw,
753 ieee80211_get_vif_queues(local, sdata),
754 reason, true);
755}
756
757void ieee80211_wake_vif_queues(struct ieee80211_local *local,
758 struct ieee80211_sub_if_data *sdata,
759 enum queue_stop_reason reason)
760{
761 ieee80211_wake_queues_by_reason(&local->hw,
762 ieee80211_get_vif_queues(local, sdata),
763 reason, true);
764}
765
766static void __iterate_interfaces(struct ieee80211_local *local,
767 u32 iter_flags,
768 void (*iterator)(void *data, u8 *mac,
769 struct ieee80211_vif *vif),
770 void *data)
771{
772 struct ieee80211_sub_if_data *sdata;
773 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
774
775 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
776 switch (sdata->vif.type) {
777 case NL80211_IFTYPE_MONITOR:
778 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
779 continue;
780 break;
781 case NL80211_IFTYPE_AP_VLAN:
782 continue;
783 default:
784 break;
785 }
786 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
787 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
788 continue;
789 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
790 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
791 continue;
792 if (ieee80211_sdata_running(sdata) || !active_only)
793 iterator(data, sdata->vif.addr,
794 &sdata->vif);
795 }
796
797 sdata = rcu_dereference_check(local->monitor_sdata,
798 lockdep_is_held(&local->iflist_mtx) ||
799 lockdep_rtnl_is_held());
800 if (sdata &&
801 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
802 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
803 iterator(data, sdata->vif.addr, &sdata->vif);
804}
805
806void ieee80211_iterate_interfaces(
807 struct ieee80211_hw *hw, u32 iter_flags,
808 void (*iterator)(void *data, u8 *mac,
809 struct ieee80211_vif *vif),
810 void *data)
811{
812 struct ieee80211_local *local = hw_to_local(hw);
813
814 mutex_lock(&local->iflist_mtx);
815 __iterate_interfaces(local, iter_flags, iterator, data);
816 mutex_unlock(&local->iflist_mtx);
817}
818EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
819
820void ieee80211_iterate_active_interfaces_atomic(
821 struct ieee80211_hw *hw, u32 iter_flags,
822 void (*iterator)(void *data, u8 *mac,
823 struct ieee80211_vif *vif),
824 void *data)
825{
826 struct ieee80211_local *local = hw_to_local(hw);
827
828 rcu_read_lock();
829 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
830 iterator, data);
831 rcu_read_unlock();
832}
833EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
834
835void ieee80211_iterate_active_interfaces_mtx(
836 struct ieee80211_hw *hw, u32 iter_flags,
837 void (*iterator)(void *data, u8 *mac,
838 struct ieee80211_vif *vif),
839 void *data)
840{
841 struct ieee80211_local *local = hw_to_local(hw);
842
843 lockdep_assert_wiphy(hw->wiphy);
844
845 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
846 iterator, data);
847}
848EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
849
850static void __iterate_stations(struct ieee80211_local *local,
851 void (*iterator)(void *data,
852 struct ieee80211_sta *sta),
853 void *data)
854{
855 struct sta_info *sta;
856
857 list_for_each_entry_rcu(sta, &local->sta_list, list) {
858 if (!sta->uploaded)
859 continue;
860
861 iterator(data, &sta->sta);
862 }
863}
864
865void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
866 void (*iterator)(void *data,
867 struct ieee80211_sta *sta),
868 void *data)
869{
870 struct ieee80211_local *local = hw_to_local(hw);
871
872 rcu_read_lock();
873 __iterate_stations(local, iterator, data);
874 rcu_read_unlock();
875}
876EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
877
878struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
879{
880 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
881
882 if (!ieee80211_sdata_running(sdata) ||
883 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
884 return NULL;
885 return &sdata->vif;
886}
887EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
888
889struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
890{
891 if (!vif)
892 return NULL;
893
894 return &vif_to_sdata(vif)->wdev;
895}
896EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
897
898/*
899 * Nothing should have been stuffed into the workqueue during
900 * the suspend->resume cycle. Since we can't check each caller
901 * of this function if we are already quiescing / suspended,
902 * check here and don't WARN since this can actually happen when
903 * the rx path (for example) is racing against __ieee80211_suspend
904 * and suspending / quiescing was set after the rx path checked
905 * them.
906 */
907static bool ieee80211_can_queue_work(struct ieee80211_local *local)
908{
909 if (local->quiescing || (local->suspended && !local->resuming)) {
910 pr_warn("queueing ieee80211 work while going to suspend\n");
911 return false;
912 }
913
914 return true;
915}
916
917void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
918{
919 struct ieee80211_local *local = hw_to_local(hw);
920
921 if (!ieee80211_can_queue_work(local))
922 return;
923
924 queue_work(local->workqueue, work);
925}
926EXPORT_SYMBOL(ieee80211_queue_work);
927
928void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
929 struct delayed_work *dwork,
930 unsigned long delay)
931{
932 struct ieee80211_local *local = hw_to_local(hw);
933
934 if (!ieee80211_can_queue_work(local))
935 return;
936
937 queue_delayed_work(local->workqueue, dwork, delay);
938}
939EXPORT_SYMBOL(ieee80211_queue_delayed_work);
940
941static void ieee80211_parse_extension_element(u32 *crc,
942 const struct element *elem,
943 struct ieee802_11_elems *elems)
944{
945 const void *data = elem->data + 1;
946 u8 len = elem->datalen - 1;
947
948 switch (elem->data[0]) {
949 case WLAN_EID_EXT_HE_MU_EDCA:
950 if (len >= sizeof(*elems->mu_edca_param_set)) {
951 elems->mu_edca_param_set = data;
952 if (crc)
953 *crc = crc32_be(*crc, (void *)elem,
954 elem->datalen + 2);
955 }
956 break;
957 case WLAN_EID_EXT_HE_CAPABILITY:
958 elems->he_cap = data;
959 elems->he_cap_len = len;
960 break;
961 case WLAN_EID_EXT_HE_OPERATION:
962 if (len >= sizeof(*elems->he_operation) &&
963 len >= ieee80211_he_oper_size(data) - 1) {
964 if (crc)
965 *crc = crc32_be(*crc, (void *)elem,
966 elem->datalen + 2);
967 elems->he_operation = data;
968 }
969 break;
970 case WLAN_EID_EXT_UORA:
971 if (len >= 1)
972 elems->uora_element = data;
973 break;
974 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
975 if (len == 3)
976 elems->max_channel_switch_time = data;
977 break;
978 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
979 if (len >= sizeof(*elems->mbssid_config_ie))
980 elems->mbssid_config_ie = data;
981 break;
982 case WLAN_EID_EXT_HE_SPR:
983 if (len >= sizeof(*elems->he_spr) &&
984 len >= ieee80211_he_spr_size(data))
985 elems->he_spr = data;
986 break;
987 case WLAN_EID_EXT_HE_6GHZ_CAPA:
988 if (len >= sizeof(*elems->he_6ghz_capa))
989 elems->he_6ghz_capa = data;
990 break;
991 }
992}
993
994static u32
995_ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
996 struct ieee802_11_elems *elems,
997 u64 filter, u32 crc,
998 const struct element *check_inherit)
999{
1000 const struct element *elem;
1001 bool calc_crc = filter != 0;
1002 DECLARE_BITMAP(seen_elems, 256);
1003 const u8 *ie;
1004
1005 bitmap_zero(seen_elems, 256);
1006
1007 for_each_element(elem, start, len) {
1008 bool elem_parse_failed;
1009 u8 id = elem->id;
1010 u8 elen = elem->datalen;
1011 const u8 *pos = elem->data;
1012
1013 if (check_inherit &&
1014 !cfg80211_is_element_inherited(elem,
1015 check_inherit))
1016 continue;
1017
1018 switch (id) {
1019 case WLAN_EID_SSID:
1020 case WLAN_EID_SUPP_RATES:
1021 case WLAN_EID_FH_PARAMS:
1022 case WLAN_EID_DS_PARAMS:
1023 case WLAN_EID_CF_PARAMS:
1024 case WLAN_EID_TIM:
1025 case WLAN_EID_IBSS_PARAMS:
1026 case WLAN_EID_CHALLENGE:
1027 case WLAN_EID_RSN:
1028 case WLAN_EID_ERP_INFO:
1029 case WLAN_EID_EXT_SUPP_RATES:
1030 case WLAN_EID_HT_CAPABILITY:
1031 case WLAN_EID_HT_OPERATION:
1032 case WLAN_EID_VHT_CAPABILITY:
1033 case WLAN_EID_VHT_OPERATION:
1034 case WLAN_EID_MESH_ID:
1035 case WLAN_EID_MESH_CONFIG:
1036 case WLAN_EID_PEER_MGMT:
1037 case WLAN_EID_PREQ:
1038 case WLAN_EID_PREP:
1039 case WLAN_EID_PERR:
1040 case WLAN_EID_RANN:
1041 case WLAN_EID_CHANNEL_SWITCH:
1042 case WLAN_EID_EXT_CHANSWITCH_ANN:
1043 case WLAN_EID_COUNTRY:
1044 case WLAN_EID_PWR_CONSTRAINT:
1045 case WLAN_EID_TIMEOUT_INTERVAL:
1046 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1048 case WLAN_EID_CHAN_SWITCH_PARAM:
1049 case WLAN_EID_EXT_CAPABILITY:
1050 case WLAN_EID_CHAN_SWITCH_TIMING:
1051 case WLAN_EID_LINK_ID:
1052 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1053 case WLAN_EID_RSNX:
1054 case WLAN_EID_S1G_BCN_COMPAT:
1055 case WLAN_EID_S1G_CAPABILITIES:
1056 case WLAN_EID_S1G_OPERATION:
1057 case WLAN_EID_AID_RESPONSE:
1058 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1059 /*
1060 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1061 * that if the content gets bigger it might be needed more than once
1062 */
1063 if (test_bit(id, seen_elems)) {
1064 elems->parse_error = true;
1065 continue;
1066 }
1067 break;
1068 }
1069
1070 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1071 crc = crc32_be(crc, pos - 2, elen + 2);
1072
1073 elem_parse_failed = false;
1074
1075 switch (id) {
1076 case WLAN_EID_LINK_ID:
1077 if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1078 elem_parse_failed = true;
1079 break;
1080 }
1081 elems->lnk_id = (void *)(pos - 2);
1082 break;
1083 case WLAN_EID_CHAN_SWITCH_TIMING:
1084 if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1085 elem_parse_failed = true;
1086 break;
1087 }
1088 elems->ch_sw_timing = (void *)pos;
1089 break;
1090 case WLAN_EID_EXT_CAPABILITY:
1091 elems->ext_capab = pos;
1092 elems->ext_capab_len = elen;
1093 break;
1094 case WLAN_EID_SSID:
1095 elems->ssid = pos;
1096 elems->ssid_len = elen;
1097 break;
1098 case WLAN_EID_SUPP_RATES:
1099 elems->supp_rates = pos;
1100 elems->supp_rates_len = elen;
1101 break;
1102 case WLAN_EID_DS_PARAMS:
1103 if (elen >= 1)
1104 elems->ds_params = pos;
1105 else
1106 elem_parse_failed = true;
1107 break;
1108 case WLAN_EID_TIM:
1109 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1110 elems->tim = (void *)pos;
1111 elems->tim_len = elen;
1112 } else
1113 elem_parse_failed = true;
1114 break;
1115 case WLAN_EID_CHALLENGE:
1116 elems->challenge = pos;
1117 elems->challenge_len = elen;
1118 break;
1119 case WLAN_EID_VENDOR_SPECIFIC:
1120 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1121 pos[2] == 0xf2) {
1122 /* Microsoft OUI (00:50:F2) */
1123
1124 if (calc_crc)
1125 crc = crc32_be(crc, pos - 2, elen + 2);
1126
1127 if (elen >= 5 && pos[3] == 2) {
1128 /* OUI Type 2 - WMM IE */
1129 if (pos[4] == 0) {
1130 elems->wmm_info = pos;
1131 elems->wmm_info_len = elen;
1132 } else if (pos[4] == 1) {
1133 elems->wmm_param = pos;
1134 elems->wmm_param_len = elen;
1135 }
1136 }
1137 }
1138 break;
1139 case WLAN_EID_RSN:
1140 elems->rsn = pos;
1141 elems->rsn_len = elen;
1142 break;
1143 case WLAN_EID_ERP_INFO:
1144 if (elen >= 1)
1145 elems->erp_info = pos;
1146 else
1147 elem_parse_failed = true;
1148 break;
1149 case WLAN_EID_EXT_SUPP_RATES:
1150 elems->ext_supp_rates = pos;
1151 elems->ext_supp_rates_len = elen;
1152 break;
1153 case WLAN_EID_HT_CAPABILITY:
1154 if (elen >= sizeof(struct ieee80211_ht_cap))
1155 elems->ht_cap_elem = (void *)pos;
1156 else
1157 elem_parse_failed = true;
1158 break;
1159 case WLAN_EID_HT_OPERATION:
1160 if (elen >= sizeof(struct ieee80211_ht_operation))
1161 elems->ht_operation = (void *)pos;
1162 else
1163 elem_parse_failed = true;
1164 break;
1165 case WLAN_EID_VHT_CAPABILITY:
1166 if (elen >= sizeof(struct ieee80211_vht_cap))
1167 elems->vht_cap_elem = (void *)pos;
1168 else
1169 elem_parse_failed = true;
1170 break;
1171 case WLAN_EID_VHT_OPERATION:
1172 if (elen >= sizeof(struct ieee80211_vht_operation)) {
1173 elems->vht_operation = (void *)pos;
1174 if (calc_crc)
1175 crc = crc32_be(crc, pos - 2, elen + 2);
1176 break;
1177 }
1178 elem_parse_failed = true;
1179 break;
1180 case WLAN_EID_OPMODE_NOTIF:
1181 if (elen > 0) {
1182 elems->opmode_notif = pos;
1183 if (calc_crc)
1184 crc = crc32_be(crc, pos - 2, elen + 2);
1185 break;
1186 }
1187 elem_parse_failed = true;
1188 break;
1189 case WLAN_EID_MESH_ID:
1190 elems->mesh_id = pos;
1191 elems->mesh_id_len = elen;
1192 break;
1193 case WLAN_EID_MESH_CONFIG:
1194 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1195 elems->mesh_config = (void *)pos;
1196 else
1197 elem_parse_failed = true;
1198 break;
1199 case WLAN_EID_PEER_MGMT:
1200 elems->peering = pos;
1201 elems->peering_len = elen;
1202 break;
1203 case WLAN_EID_MESH_AWAKE_WINDOW:
1204 if (elen >= 2)
1205 elems->awake_window = (void *)pos;
1206 break;
1207 case WLAN_EID_PREQ:
1208 elems->preq = pos;
1209 elems->preq_len = elen;
1210 break;
1211 case WLAN_EID_PREP:
1212 elems->prep = pos;
1213 elems->prep_len = elen;
1214 break;
1215 case WLAN_EID_PERR:
1216 elems->perr = pos;
1217 elems->perr_len = elen;
1218 break;
1219 case WLAN_EID_RANN:
1220 if (elen >= sizeof(struct ieee80211_rann_ie))
1221 elems->rann = (void *)pos;
1222 else
1223 elem_parse_failed = true;
1224 break;
1225 case WLAN_EID_CHANNEL_SWITCH:
1226 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1227 elem_parse_failed = true;
1228 break;
1229 }
1230 elems->ch_switch_ie = (void *)pos;
1231 break;
1232 case WLAN_EID_EXT_CHANSWITCH_ANN:
1233 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1234 elem_parse_failed = true;
1235 break;
1236 }
1237 elems->ext_chansw_ie = (void *)pos;
1238 break;
1239 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1240 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1241 elem_parse_failed = true;
1242 break;
1243 }
1244 elems->sec_chan_offs = (void *)pos;
1245 break;
1246 case WLAN_EID_CHAN_SWITCH_PARAM:
1247 if (elen <
1248 sizeof(*elems->mesh_chansw_params_ie)) {
1249 elem_parse_failed = true;
1250 break;
1251 }
1252 elems->mesh_chansw_params_ie = (void *)pos;
1253 break;
1254 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1255 if (!action ||
1256 elen < sizeof(*elems->wide_bw_chansw_ie)) {
1257 elem_parse_failed = true;
1258 break;
1259 }
1260 elems->wide_bw_chansw_ie = (void *)pos;
1261 break;
1262 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1263 if (action) {
1264 elem_parse_failed = true;
1265 break;
1266 }
1267 /*
1268 * This is a bit tricky, but as we only care about
1269 * the wide bandwidth channel switch element, so
1270 * just parse it out manually.
1271 */
1272 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1273 pos, elen);
1274 if (ie) {
1275 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1276 elems->wide_bw_chansw_ie =
1277 (void *)(ie + 2);
1278 else
1279 elem_parse_failed = true;
1280 }
1281 break;
1282 case WLAN_EID_COUNTRY:
1283 elems->country_elem = pos;
1284 elems->country_elem_len = elen;
1285 break;
1286 case WLAN_EID_PWR_CONSTRAINT:
1287 if (elen != 1) {
1288 elem_parse_failed = true;
1289 break;
1290 }
1291 elems->pwr_constr_elem = pos;
1292 break;
1293 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1294 /* Lots of different options exist, but we only care
1295 * about the Dynamic Transmit Power Control element.
1296 * First check for the Cisco OUI, then for the DTPC
1297 * tag (0x00).
1298 */
1299 if (elen < 4) {
1300 elem_parse_failed = true;
1301 break;
1302 }
1303
1304 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1305 pos[2] != 0x96 || pos[3] != 0x00)
1306 break;
1307
1308 if (elen != 6) {
1309 elem_parse_failed = true;
1310 break;
1311 }
1312
1313 if (calc_crc)
1314 crc = crc32_be(crc, pos - 2, elen + 2);
1315
1316 elems->cisco_dtpc_elem = pos;
1317 break;
1318 case WLAN_EID_ADDBA_EXT:
1319 if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1320 elem_parse_failed = true;
1321 break;
1322 }
1323 elems->addba_ext_ie = (void *)pos;
1324 break;
1325 case WLAN_EID_TIMEOUT_INTERVAL:
1326 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1327 elems->timeout_int = (void *)pos;
1328 else
1329 elem_parse_failed = true;
1330 break;
1331 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1332 if (elen >= sizeof(*elems->max_idle_period_ie))
1333 elems->max_idle_period_ie = (void *)pos;
1334 break;
1335 case WLAN_EID_RSNX:
1336 elems->rsnx = pos;
1337 elems->rsnx_len = elen;
1338 break;
1339 case WLAN_EID_EXTENSION:
1340 ieee80211_parse_extension_element(calc_crc ?
1341 &crc : NULL,
1342 elem, elems);
1343 break;
1344 case WLAN_EID_S1G_CAPABILITIES:
1345 if (elen >= sizeof(*elems->s1g_capab))
1346 elems->s1g_capab = (void *)pos;
1347 else
1348 elem_parse_failed = true;
1349 break;
1350 case WLAN_EID_S1G_OPERATION:
1351 if (elen == sizeof(*elems->s1g_oper))
1352 elems->s1g_oper = (void *)pos;
1353 else
1354 elem_parse_failed = true;
1355 break;
1356 case WLAN_EID_S1G_BCN_COMPAT:
1357 if (elen == sizeof(*elems->s1g_bcn_compat))
1358 elems->s1g_bcn_compat = (void *)pos;
1359 else
1360 elem_parse_failed = true;
1361 break;
1362 case WLAN_EID_AID_RESPONSE:
1363 if (elen == sizeof(struct ieee80211_aid_response_ie))
1364 elems->aid_resp = (void *)pos;
1365 else
1366 elem_parse_failed = true;
1367 break;
1368 default:
1369 break;
1370 }
1371
1372 if (elem_parse_failed)
1373 elems->parse_error = true;
1374 else
1375 __set_bit(id, seen_elems);
1376 }
1377
1378 if (!for_each_element_completed(elem, start, len))
1379 elems->parse_error = true;
1380
1381 return crc;
1382}
1383
1384static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1385 struct ieee802_11_elems *elems,
1386 u8 *transmitter_bssid,
1387 u8 *bss_bssid,
1388 u8 *nontransmitted_profile)
1389{
1390 const struct element *elem, *sub;
1391 size_t profile_len = 0;
1392 bool found = false;
1393
1394 if (!bss_bssid || !transmitter_bssid)
1395 return profile_len;
1396
1397 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1398 if (elem->datalen < 2)
1399 continue;
1400
1401 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1402 u8 new_bssid[ETH_ALEN];
1403 const u8 *index;
1404
1405 if (sub->id != 0 || sub->datalen < 4) {
1406 /* not a valid BSS profile */
1407 continue;
1408 }
1409
1410 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1411 sub->data[1] != 2) {
1412 /* The first element of the
1413 * Nontransmitted BSSID Profile is not
1414 * the Nontransmitted BSSID Capability
1415 * element.
1416 */
1417 continue;
1418 }
1419
1420 memset(nontransmitted_profile, 0, len);
1421 profile_len = cfg80211_merge_profile(start, len,
1422 elem,
1423 sub,
1424 nontransmitted_profile,
1425 len);
1426
1427 /* found a Nontransmitted BSSID Profile */
1428 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1429 nontransmitted_profile,
1430 profile_len);
1431 if (!index || index[1] < 1 || index[2] == 0) {
1432 /* Invalid MBSSID Index element */
1433 continue;
1434 }
1435
1436 cfg80211_gen_new_bssid(transmitter_bssid,
1437 elem->data[0],
1438 index[2],
1439 new_bssid);
1440 if (ether_addr_equal(new_bssid, bss_bssid)) {
1441 found = true;
1442 elems->bssid_index_len = index[1];
1443 elems->bssid_index = (void *)&index[2];
1444 break;
1445 }
1446 }
1447 }
1448
1449 return found ? profile_len : 0;
1450}
1451
1452u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1453 struct ieee802_11_elems *elems,
1454 u64 filter, u32 crc, u8 *transmitter_bssid,
1455 u8 *bss_bssid)
1456{
1457 const struct element *non_inherit = NULL;
1458 u8 *nontransmitted_profile;
1459 int nontransmitted_profile_len = 0;
1460
1461 memset(elems, 0, sizeof(*elems));
1462 elems->ie_start = start;
1463 elems->total_len = len;
1464
1465 nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1466 if (nontransmitted_profile) {
1467 nontransmitted_profile_len =
1468 ieee802_11_find_bssid_profile(start, len, elems,
1469 transmitter_bssid,
1470 bss_bssid,
1471 nontransmitted_profile);
1472 non_inherit =
1473 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1474 nontransmitted_profile,
1475 nontransmitted_profile_len);
1476 }
1477
1478 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1479 crc, non_inherit);
1480
1481 /* Override with nontransmitted profile, if found */
1482 if (nontransmitted_profile_len)
1483 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1484 nontransmitted_profile_len,
1485 action, elems, 0, 0, NULL);
1486
1487 if (elems->tim && !elems->parse_error) {
1488 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1489
1490 elems->dtim_period = tim_ie->dtim_period;
1491 elems->dtim_count = tim_ie->dtim_count;
1492 }
1493
1494 /* Override DTIM period and count if needed */
1495 if (elems->bssid_index &&
1496 elems->bssid_index_len >=
1497 offsetofend(struct ieee80211_bssid_index, dtim_period))
1498 elems->dtim_period = elems->bssid_index->dtim_period;
1499
1500 if (elems->bssid_index &&
1501 elems->bssid_index_len >=
1502 offsetofend(struct ieee80211_bssid_index, dtim_count))
1503 elems->dtim_count = elems->bssid_index->dtim_count;
1504
1505 kfree(nontransmitted_profile);
1506
1507 return crc;
1508}
1509
1510void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1511 struct ieee80211_tx_queue_params
1512 *qparam, int ac)
1513{
1514 struct ieee80211_chanctx_conf *chanctx_conf;
1515 const struct ieee80211_reg_rule *rrule;
1516 const struct ieee80211_wmm_ac *wmm_ac;
1517 u16 center_freq = 0;
1518
1519 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1520 sdata->vif.type != NL80211_IFTYPE_STATION)
1521 return;
1522
1523 rcu_read_lock();
1524 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1525 if (chanctx_conf)
1526 center_freq = chanctx_conf->def.chan->center_freq;
1527
1528 if (!center_freq) {
1529 rcu_read_unlock();
1530 return;
1531 }
1532
1533 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1534
1535 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1536 rcu_read_unlock();
1537 return;
1538 }
1539
1540 if (sdata->vif.type == NL80211_IFTYPE_AP)
1541 wmm_ac = &rrule->wmm_rule.ap[ac];
1542 else
1543 wmm_ac = &rrule->wmm_rule.client[ac];
1544 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1545 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1546 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1547 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1548 rcu_read_unlock();
1549}
1550
1551void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1552 bool bss_notify, bool enable_qos)
1553{
1554 struct ieee80211_local *local = sdata->local;
1555 struct ieee80211_tx_queue_params qparam;
1556 struct ieee80211_chanctx_conf *chanctx_conf;
1557 int ac;
1558 bool use_11b;
1559 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1560 int aCWmin, aCWmax;
1561
1562 if (!local->ops->conf_tx)
1563 return;
1564
1565 if (local->hw.queues < IEEE80211_NUM_ACS)
1566 return;
1567
1568 memset(&qparam, 0, sizeof(qparam));
1569
1570 rcu_read_lock();
1571 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1572 use_11b = (chanctx_conf &&
1573 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1574 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1575 rcu_read_unlock();
1576
1577 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1578
1579 /* Set defaults according to 802.11-2007 Table 7-37 */
1580 aCWmax = 1023;
1581 if (use_11b)
1582 aCWmin = 31;
1583 else
1584 aCWmin = 15;
1585
1586 /* Confiure old 802.11b/g medium access rules. */
1587 qparam.cw_max = aCWmax;
1588 qparam.cw_min = aCWmin;
1589 qparam.txop = 0;
1590 qparam.aifs = 2;
1591
1592 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1593 /* Update if QoS is enabled. */
1594 if (enable_qos) {
1595 switch (ac) {
1596 case IEEE80211_AC_BK:
1597 qparam.cw_max = aCWmax;
1598 qparam.cw_min = aCWmin;
1599 qparam.txop = 0;
1600 if (is_ocb)
1601 qparam.aifs = 9;
1602 else
1603 qparam.aifs = 7;
1604 break;
1605 /* never happens but let's not leave undefined */
1606 default:
1607 case IEEE80211_AC_BE:
1608 qparam.cw_max = aCWmax;
1609 qparam.cw_min = aCWmin;
1610 qparam.txop = 0;
1611 if (is_ocb)
1612 qparam.aifs = 6;
1613 else
1614 qparam.aifs = 3;
1615 break;
1616 case IEEE80211_AC_VI:
1617 qparam.cw_max = aCWmin;
1618 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1619 if (is_ocb)
1620 qparam.txop = 0;
1621 else if (use_11b)
1622 qparam.txop = 6016/32;
1623 else
1624 qparam.txop = 3008/32;
1625
1626 if (is_ocb)
1627 qparam.aifs = 3;
1628 else
1629 qparam.aifs = 2;
1630 break;
1631 case IEEE80211_AC_VO:
1632 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1633 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1634 if (is_ocb)
1635 qparam.txop = 0;
1636 else if (use_11b)
1637 qparam.txop = 3264/32;
1638 else
1639 qparam.txop = 1504/32;
1640 qparam.aifs = 2;
1641 break;
1642 }
1643 }
1644 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1645
1646 qparam.uapsd = false;
1647
1648 sdata->tx_conf[ac] = qparam;
1649 drv_conf_tx(local, sdata, ac, &qparam);
1650 }
1651
1652 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1653 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1654 sdata->vif.type != NL80211_IFTYPE_NAN) {
1655 sdata->vif.bss_conf.qos = enable_qos;
1656 if (bss_notify)
1657 ieee80211_bss_info_change_notify(sdata,
1658 BSS_CHANGED_QOS);
1659 }
1660}
1661
1662void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1663 u16 transaction, u16 auth_alg, u16 status,
1664 const u8 *extra, size_t extra_len, const u8 *da,
1665 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1666 u32 tx_flags)
1667{
1668 struct ieee80211_local *local = sdata->local;
1669 struct sk_buff *skb;
1670 struct ieee80211_mgmt *mgmt;
1671 int err;
1672
1673 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1674 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1675 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1676 if (!skb)
1677 return;
1678
1679 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1680
1681 mgmt = skb_put_zero(skb, 24 + 6);
1682 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1683 IEEE80211_STYPE_AUTH);
1684 memcpy(mgmt->da, da, ETH_ALEN);
1685 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1686 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1687 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1688 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1689 mgmt->u.auth.status_code = cpu_to_le16(status);
1690 if (extra)
1691 skb_put_data(skb, extra, extra_len);
1692
1693 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1694 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1695 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1696 if (WARN_ON(err)) {
1697 kfree_skb(skb);
1698 return;
1699 }
1700 }
1701
1702 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1703 tx_flags;
1704 ieee80211_tx_skb(sdata, skb);
1705}
1706
1707void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1708 const u8 *da, const u8 *bssid,
1709 u16 stype, u16 reason,
1710 bool send_frame, u8 *frame_buf)
1711{
1712 struct ieee80211_local *local = sdata->local;
1713 struct sk_buff *skb;
1714 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1715
1716 /* build frame */
1717 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1718 mgmt->duration = 0; /* initialize only */
1719 mgmt->seq_ctrl = 0; /* initialize only */
1720 memcpy(mgmt->da, da, ETH_ALEN);
1721 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1722 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1723 /* u.deauth.reason_code == u.disassoc.reason_code */
1724 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1725
1726 if (send_frame) {
1727 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1728 IEEE80211_DEAUTH_FRAME_LEN);
1729 if (!skb)
1730 return;
1731
1732 skb_reserve(skb, local->hw.extra_tx_headroom);
1733
1734 /* copy in frame */
1735 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1736
1737 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1738 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1739 IEEE80211_SKB_CB(skb)->flags |=
1740 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1741
1742 ieee80211_tx_skb(sdata, skb);
1743 }
1744}
1745
1746static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1747{
1748 if ((end - pos) < 5)
1749 return pos;
1750
1751 *pos++ = WLAN_EID_EXTENSION;
1752 *pos++ = 1 + sizeof(cap);
1753 *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1754 memcpy(pos, &cap, sizeof(cap));
1755
1756 return pos + 2;
1757}
1758
1759static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1760 u8 *buffer, size_t buffer_len,
1761 const u8 *ie, size_t ie_len,
1762 enum nl80211_band band,
1763 u32 rate_mask,
1764 struct cfg80211_chan_def *chandef,
1765 size_t *offset, u32 flags)
1766{
1767 struct ieee80211_local *local = sdata->local;
1768 struct ieee80211_supported_band *sband;
1769 const struct ieee80211_sta_he_cap *he_cap;
1770 u8 *pos = buffer, *end = buffer + buffer_len;
1771 size_t noffset;
1772 int supp_rates_len, i;
1773 u8 rates[32];
1774 int num_rates;
1775 int ext_rates_len;
1776 int shift;
1777 u32 rate_flags;
1778 bool have_80mhz = false;
1779
1780 *offset = 0;
1781
1782 sband = local->hw.wiphy->bands[band];
1783 if (WARN_ON_ONCE(!sband))
1784 return 0;
1785
1786 rate_flags = ieee80211_chandef_rate_flags(chandef);
1787 shift = ieee80211_chandef_get_shift(chandef);
1788
1789 num_rates = 0;
1790 for (i = 0; i < sband->n_bitrates; i++) {
1791 if ((BIT(i) & rate_mask) == 0)
1792 continue; /* skip rate */
1793 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1794 continue;
1795
1796 rates[num_rates++] =
1797 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1798 (1 << shift) * 5);
1799 }
1800
1801 supp_rates_len = min_t(int, num_rates, 8);
1802
1803 if (end - pos < 2 + supp_rates_len)
1804 goto out_err;
1805 *pos++ = WLAN_EID_SUPP_RATES;
1806 *pos++ = supp_rates_len;
1807 memcpy(pos, rates, supp_rates_len);
1808 pos += supp_rates_len;
1809
1810 /* insert "request information" if in custom IEs */
1811 if (ie && ie_len) {
1812 static const u8 before_extrates[] = {
1813 WLAN_EID_SSID,
1814 WLAN_EID_SUPP_RATES,
1815 WLAN_EID_REQUEST,
1816 };
1817 noffset = ieee80211_ie_split(ie, ie_len,
1818 before_extrates,
1819 ARRAY_SIZE(before_extrates),
1820 *offset);
1821 if (end - pos < noffset - *offset)
1822 goto out_err;
1823 memcpy(pos, ie + *offset, noffset - *offset);
1824 pos += noffset - *offset;
1825 *offset = noffset;
1826 }
1827
1828 ext_rates_len = num_rates - supp_rates_len;
1829 if (ext_rates_len > 0) {
1830 if (end - pos < 2 + ext_rates_len)
1831 goto out_err;
1832 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1833 *pos++ = ext_rates_len;
1834 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1835 pos += ext_rates_len;
1836 }
1837
1838 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1839 if (end - pos < 3)
1840 goto out_err;
1841 *pos++ = WLAN_EID_DS_PARAMS;
1842 *pos++ = 1;
1843 *pos++ = ieee80211_frequency_to_channel(
1844 chandef->chan->center_freq);
1845 }
1846
1847 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1848 goto done;
1849
1850 /* insert custom IEs that go before HT */
1851 if (ie && ie_len) {
1852 static const u8 before_ht[] = {
1853 /*
1854 * no need to list the ones split off already
1855 * (or generated here)
1856 */
1857 WLAN_EID_DS_PARAMS,
1858 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1859 };
1860 noffset = ieee80211_ie_split(ie, ie_len,
1861 before_ht, ARRAY_SIZE(before_ht),
1862 *offset);
1863 if (end - pos < noffset - *offset)
1864 goto out_err;
1865 memcpy(pos, ie + *offset, noffset - *offset);
1866 pos += noffset - *offset;
1867 *offset = noffset;
1868 }
1869
1870 if (sband->ht_cap.ht_supported) {
1871 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1872 goto out_err;
1873 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1874 sband->ht_cap.cap);
1875 }
1876
1877 /* insert custom IEs that go before VHT */
1878 if (ie && ie_len) {
1879 static const u8 before_vht[] = {
1880 /*
1881 * no need to list the ones split off already
1882 * (or generated here)
1883 */
1884 WLAN_EID_BSS_COEX_2040,
1885 WLAN_EID_EXT_CAPABILITY,
1886 WLAN_EID_SSID_LIST,
1887 WLAN_EID_CHANNEL_USAGE,
1888 WLAN_EID_INTERWORKING,
1889 WLAN_EID_MESH_ID,
1890 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1891 };
1892 noffset = ieee80211_ie_split(ie, ie_len,
1893 before_vht, ARRAY_SIZE(before_vht),
1894 *offset);
1895 if (end - pos < noffset - *offset)
1896 goto out_err;
1897 memcpy(pos, ie + *offset, noffset - *offset);
1898 pos += noffset - *offset;
1899 *offset = noffset;
1900 }
1901
1902 /* Check if any channel in this sband supports at least 80 MHz */
1903 for (i = 0; i < sband->n_channels; i++) {
1904 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1905 IEEE80211_CHAN_NO_80MHZ))
1906 continue;
1907
1908 have_80mhz = true;
1909 break;
1910 }
1911
1912 if (sband->vht_cap.vht_supported && have_80mhz) {
1913 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1914 goto out_err;
1915 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1916 sband->vht_cap.cap);
1917 }
1918
1919 /* insert custom IEs that go before HE */
1920 if (ie && ie_len) {
1921 static const u8 before_he[] = {
1922 /*
1923 * no need to list the ones split off before VHT
1924 * or generated here
1925 */
1926 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1927 WLAN_EID_AP_CSN,
1928 /* TODO: add 11ah/11aj/11ak elements */
1929 };
1930 noffset = ieee80211_ie_split(ie, ie_len,
1931 before_he, ARRAY_SIZE(before_he),
1932 *offset);
1933 if (end - pos < noffset - *offset)
1934 goto out_err;
1935 memcpy(pos, ie + *offset, noffset - *offset);
1936 pos += noffset - *offset;
1937 *offset = noffset;
1938 }
1939
1940 he_cap = ieee80211_get_he_iftype_cap(sband,
1941 ieee80211_vif_type_p2p(&sdata->vif));
1942 if (he_cap &&
1943 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1944 IEEE80211_CHAN_NO_HE)) {
1945 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1946 if (!pos)
1947 goto out_err;
1948 }
1949
1950 if (cfg80211_any_usable_channels(local->hw.wiphy,
1951 BIT(NL80211_BAND_6GHZ),
1952 IEEE80211_CHAN_NO_HE)) {
1953 struct ieee80211_supported_band *sband6;
1954
1955 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1956 he_cap = ieee80211_get_he_iftype_cap(sband6,
1957 ieee80211_vif_type_p2p(&sdata->vif));
1958
1959 if (he_cap) {
1960 enum nl80211_iftype iftype =
1961 ieee80211_vif_type_p2p(&sdata->vif);
1962 __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1963
1964 pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1965 }
1966 }
1967
1968 /*
1969 * If adding more here, adjust code in main.c
1970 * that calculates local->scan_ies_len.
1971 */
1972
1973 return pos - buffer;
1974 out_err:
1975 WARN_ONCE(1, "not enough space for preq IEs\n");
1976 done:
1977 return pos - buffer;
1978}
1979
1980int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1981 size_t buffer_len,
1982 struct ieee80211_scan_ies *ie_desc,
1983 const u8 *ie, size_t ie_len,
1984 u8 bands_used, u32 *rate_masks,
1985 struct cfg80211_chan_def *chandef,
1986 u32 flags)
1987{
1988 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1989 int i;
1990
1991 memset(ie_desc, 0, sizeof(*ie_desc));
1992
1993 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1994 if (bands_used & BIT(i)) {
1995 pos += ieee80211_build_preq_ies_band(sdata,
1996 buffer + pos,
1997 buffer_len - pos,
1998 ie, ie_len, i,
1999 rate_masks[i],
2000 chandef,
2001 &custom_ie_offset,
2002 flags);
2003 ie_desc->ies[i] = buffer + old_pos;
2004 ie_desc->len[i] = pos - old_pos;
2005 old_pos = pos;
2006 }
2007 }
2008
2009 /* add any remaining custom IEs */
2010 if (ie && ie_len) {
2011 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2012 "not enough space for preq custom IEs\n"))
2013 return pos;
2014 memcpy(buffer + pos, ie + custom_ie_offset,
2015 ie_len - custom_ie_offset);
2016 ie_desc->common_ies = buffer + pos;
2017 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2018 pos += ie_len - custom_ie_offset;
2019 }
2020
2021 return pos;
2022};
2023
2024struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2025 const u8 *src, const u8 *dst,
2026 u32 ratemask,
2027 struct ieee80211_channel *chan,
2028 const u8 *ssid, size_t ssid_len,
2029 const u8 *ie, size_t ie_len,
2030 u32 flags)
2031{
2032 struct ieee80211_local *local = sdata->local;
2033 struct cfg80211_chan_def chandef;
2034 struct sk_buff *skb;
2035 struct ieee80211_mgmt *mgmt;
2036 int ies_len;
2037 u32 rate_masks[NUM_NL80211_BANDS] = {};
2038 struct ieee80211_scan_ies dummy_ie_desc;
2039
2040 /*
2041 * Do not send DS Channel parameter for directed probe requests
2042 * in order to maximize the chance that we get a response. Some
2043 * badly-behaved APs don't respond when this parameter is included.
2044 */
2045 chandef.width = sdata->vif.bss_conf.chandef.width;
2046 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2047 chandef.chan = NULL;
2048 else
2049 chandef.chan = chan;
2050
2051 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2052 100 + ie_len);
2053 if (!skb)
2054 return NULL;
2055
2056 rate_masks[chan->band] = ratemask;
2057 ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2058 skb_tailroom(skb), &dummy_ie_desc,
2059 ie, ie_len, BIT(chan->band),
2060 rate_masks, &chandef, flags);
2061 skb_put(skb, ies_len);
2062
2063 if (dst) {
2064 mgmt = (struct ieee80211_mgmt *) skb->data;
2065 memcpy(mgmt->da, dst, ETH_ALEN);
2066 memcpy(mgmt->bssid, dst, ETH_ALEN);
2067 }
2068
2069 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2070
2071 return skb;
2072}
2073
2074u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2075 struct ieee802_11_elems *elems,
2076 enum nl80211_band band, u32 *basic_rates)
2077{
2078 struct ieee80211_supported_band *sband;
2079 size_t num_rates;
2080 u32 supp_rates, rate_flags;
2081 int i, j, shift;
2082
2083 sband = sdata->local->hw.wiphy->bands[band];
2084 if (WARN_ON(!sband))
2085 return 1;
2086
2087 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2088 shift = ieee80211_vif_get_shift(&sdata->vif);
2089
2090 num_rates = sband->n_bitrates;
2091 supp_rates = 0;
2092 for (i = 0; i < elems->supp_rates_len +
2093 elems->ext_supp_rates_len; i++) {
2094 u8 rate = 0;
2095 int own_rate;
2096 bool is_basic;
2097 if (i < elems->supp_rates_len)
2098 rate = elems->supp_rates[i];
2099 else if (elems->ext_supp_rates)
2100 rate = elems->ext_supp_rates
2101 [i - elems->supp_rates_len];
2102 own_rate = 5 * (rate & 0x7f);
2103 is_basic = !!(rate & 0x80);
2104
2105 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2106 continue;
2107
2108 for (j = 0; j < num_rates; j++) {
2109 int brate;
2110 if ((rate_flags & sband->bitrates[j].flags)
2111 != rate_flags)
2112 continue;
2113
2114 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2115 1 << shift);
2116
2117 if (brate == own_rate) {
2118 supp_rates |= BIT(j);
2119 if (basic_rates && is_basic)
2120 *basic_rates |= BIT(j);
2121 }
2122 }
2123 }
2124 return supp_rates;
2125}
2126
2127void ieee80211_stop_device(struct ieee80211_local *local)
2128{
2129 ieee80211_led_radio(local, false);
2130 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2131
2132 cancel_work_sync(&local->reconfig_filter);
2133
2134 flush_workqueue(local->workqueue);
2135 drv_stop(local);
2136}
2137
2138static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2139 bool aborted)
2140{
2141 /* It's possible that we don't handle the scan completion in
2142 * time during suspend, so if it's still marked as completed
2143 * here, queue the work and flush it to clean things up.
2144 * Instead of calling the worker function directly here, we
2145 * really queue it to avoid potential races with other flows
2146 * scheduling the same work.
2147 */
2148 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2149 /* If coming from reconfiguration failure, abort the scan so
2150 * we don't attempt to continue a partial HW scan - which is
2151 * possible otherwise if (e.g.) the 2.4 GHz portion was the
2152 * completed scan, and a 5 GHz portion is still pending.
2153 */
2154 if (aborted)
2155 set_bit(SCAN_ABORTED, &local->scanning);
2156 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2157 flush_delayed_work(&local->scan_work);
2158 }
2159}
2160
2161static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2162{
2163 struct ieee80211_sub_if_data *sdata;
2164 struct ieee80211_chanctx *ctx;
2165
2166 /*
2167 * We get here if during resume the device can't be restarted properly.
2168 * We might also get here if this happens during HW reset, which is a
2169 * slightly different situation and we need to drop all connections in
2170 * the latter case.
2171 *
2172 * Ask cfg80211 to turn off all interfaces, this will result in more
2173 * warnings but at least we'll then get into a clean stopped state.
2174 */
2175
2176 local->resuming = false;
2177 local->suspended = false;
2178 local->in_reconfig = false;
2179
2180 ieee80211_flush_completed_scan(local, true);
2181
2182 /* scheduled scan clearly can't be running any more, but tell
2183 * cfg80211 and clear local state
2184 */
2185 ieee80211_sched_scan_end(local);
2186
2187 list_for_each_entry(sdata, &local->interfaces, list)
2188 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2189
2190 /* Mark channel contexts as not being in the driver any more to avoid
2191 * removing them from the driver during the shutdown process...
2192 */
2193 mutex_lock(&local->chanctx_mtx);
2194 list_for_each_entry(ctx, &local->chanctx_list, list)
2195 ctx->driver_present = false;
2196 mutex_unlock(&local->chanctx_mtx);
2197}
2198
2199static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2200 struct ieee80211_sub_if_data *sdata)
2201{
2202 struct ieee80211_chanctx_conf *conf;
2203 struct ieee80211_chanctx *ctx;
2204
2205 if (!local->use_chanctx)
2206 return;
2207
2208 mutex_lock(&local->chanctx_mtx);
2209 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2210 lockdep_is_held(&local->chanctx_mtx));
2211 if (conf) {
2212 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2213 drv_assign_vif_chanctx(local, sdata, ctx);
2214 }
2215 mutex_unlock(&local->chanctx_mtx);
2216}
2217
2218static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2219{
2220 struct ieee80211_local *local = sdata->local;
2221 struct sta_info *sta;
2222
2223 /* add STAs back */
2224 mutex_lock(&local->sta_mtx);
2225 list_for_each_entry(sta, &local->sta_list, list) {
2226 enum ieee80211_sta_state state;
2227
2228 if (!sta->uploaded || sta->sdata != sdata)
2229 continue;
2230
2231 for (state = IEEE80211_STA_NOTEXIST;
2232 state < sta->sta_state; state++)
2233 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2234 state + 1));
2235 }
2236 mutex_unlock(&local->sta_mtx);
2237}
2238
2239static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2240{
2241 struct cfg80211_nan_func *func, **funcs;
2242 int res, id, i = 0;
2243
2244 res = drv_start_nan(sdata->local, sdata,
2245 &sdata->u.nan.conf);
2246 if (WARN_ON(res))
2247 return res;
2248
2249 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2250 sizeof(*funcs),
2251 GFP_KERNEL);
2252 if (!funcs)
2253 return -ENOMEM;
2254
2255 /* Add all the functions:
2256 * This is a little bit ugly. We need to call a potentially sleeping
2257 * callback for each NAN function, so we can't hold the spinlock.
2258 */
2259 spin_lock_bh(&sdata->u.nan.func_lock);
2260
2261 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2262 funcs[i++] = func;
2263
2264 spin_unlock_bh(&sdata->u.nan.func_lock);
2265
2266 for (i = 0; funcs[i]; i++) {
2267 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2268 if (WARN_ON(res))
2269 ieee80211_nan_func_terminated(&sdata->vif,
2270 funcs[i]->instance_id,
2271 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2272 GFP_KERNEL);
2273 }
2274
2275 kfree(funcs);
2276
2277 return 0;
2278}
2279
2280int ieee80211_reconfig(struct ieee80211_local *local)
2281{
2282 struct ieee80211_hw *hw = &local->hw;
2283 struct ieee80211_sub_if_data *sdata;
2284 struct ieee80211_chanctx *ctx;
2285 struct sta_info *sta;
2286 int res, i;
2287 bool reconfig_due_to_wowlan = false;
2288 struct ieee80211_sub_if_data *sched_scan_sdata;
2289 struct cfg80211_sched_scan_request *sched_scan_req;
2290 bool sched_scan_stopped = false;
2291 bool suspended = local->suspended;
2292
2293 /* nothing to do if HW shouldn't run */
2294 if (!local->open_count)
2295 goto wake_up;
2296
2297#ifdef CONFIG_PM
2298 if (suspended)
2299 local->resuming = true;
2300
2301 if (local->wowlan) {
2302 /*
2303 * In the wowlan case, both mac80211 and the device
2304 * are functional when the resume op is called, so
2305 * clear local->suspended so the device could operate
2306 * normally (e.g. pass rx frames).
2307 */
2308 local->suspended = false;
2309 res = drv_resume(local);
2310 local->wowlan = false;
2311 if (res < 0) {
2312 local->resuming = false;
2313 return res;
2314 }
2315 if (res == 0)
2316 goto wake_up;
2317 WARN_ON(res > 1);
2318 /*
2319 * res is 1, which means the driver requested
2320 * to go through a regular reset on wakeup.
2321 * restore local->suspended in this case.
2322 */
2323 reconfig_due_to_wowlan = true;
2324 local->suspended = true;
2325 }
2326#endif
2327
2328 /*
2329 * In case of hw_restart during suspend (without wowlan),
2330 * cancel restart work, as we are reconfiguring the device
2331 * anyway.
2332 * Note that restart_work is scheduled on a frozen workqueue,
2333 * so we can't deadlock in this case.
2334 */
2335 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2336 cancel_work_sync(&local->restart_work);
2337
2338 local->started = false;
2339
2340 /*
2341 * Upon resume hardware can sometimes be goofy due to
2342 * various platform / driver / bus issues, so restarting
2343 * the device may at times not work immediately. Propagate
2344 * the error.
2345 */
2346 res = drv_start(local);
2347 if (res) {
2348 if (suspended)
2349 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2350 else
2351 WARN(1, "Hardware became unavailable during restart.\n");
2352 ieee80211_handle_reconfig_failure(local);
2353 return res;
2354 }
2355
2356 /* setup fragmentation threshold */
2357 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2358
2359 /* setup RTS threshold */
2360 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2361
2362 /* reset coverage class */
2363 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2364
2365 ieee80211_led_radio(local, true);
2366 ieee80211_mod_tpt_led_trig(local,
2367 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2368
2369 /* add interfaces */
2370 sdata = rtnl_dereference(local->monitor_sdata);
2371 if (sdata) {
2372 /* in HW restart it exists already */
2373 WARN_ON(local->resuming);
2374 res = drv_add_interface(local, sdata);
2375 if (WARN_ON(res)) {
2376 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2377 synchronize_net();
2378 kfree(sdata);
2379 }
2380 }
2381
2382 list_for_each_entry(sdata, &local->interfaces, list) {
2383 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2384 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2385 ieee80211_sdata_running(sdata)) {
2386 res = drv_add_interface(local, sdata);
2387 if (WARN_ON(res))
2388 break;
2389 }
2390 }
2391
2392 /* If adding any of the interfaces failed above, roll back and
2393 * report failure.
2394 */
2395 if (res) {
2396 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2397 list)
2398 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2399 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2400 ieee80211_sdata_running(sdata))
2401 drv_remove_interface(local, sdata);
2402 ieee80211_handle_reconfig_failure(local);
2403 return res;
2404 }
2405
2406 /* add channel contexts */
2407 if (local->use_chanctx) {
2408 mutex_lock(&local->chanctx_mtx);
2409 list_for_each_entry(ctx, &local->chanctx_list, list)
2410 if (ctx->replace_state !=
2411 IEEE80211_CHANCTX_REPLACES_OTHER)
2412 WARN_ON(drv_add_chanctx(local, ctx));
2413 mutex_unlock(&local->chanctx_mtx);
2414
2415 sdata = rtnl_dereference(local->monitor_sdata);
2416 if (sdata && ieee80211_sdata_running(sdata))
2417 ieee80211_assign_chanctx(local, sdata);
2418 }
2419
2420 /* reconfigure hardware */
2421 ieee80211_hw_config(local, ~0);
2422
2423 ieee80211_configure_filter(local);
2424
2425 /* Finally also reconfigure all the BSS information */
2426 list_for_each_entry(sdata, &local->interfaces, list) {
2427 u32 changed;
2428
2429 if (!ieee80211_sdata_running(sdata))
2430 continue;
2431
2432 ieee80211_assign_chanctx(local, sdata);
2433
2434 switch (sdata->vif.type) {
2435 case NL80211_IFTYPE_AP_VLAN:
2436 case NL80211_IFTYPE_MONITOR:
2437 break;
2438 case NL80211_IFTYPE_ADHOC:
2439 if (sdata->vif.bss_conf.ibss_joined)
2440 WARN_ON(drv_join_ibss(local, sdata));
2441 fallthrough;
2442 default:
2443 ieee80211_reconfig_stations(sdata);
2444 fallthrough;
2445 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2446 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2447 drv_conf_tx(local, sdata, i,
2448 &sdata->tx_conf[i]);
2449 break;
2450 }
2451
2452 /* common change flags for all interface types */
2453 changed = BSS_CHANGED_ERP_CTS_PROT |
2454 BSS_CHANGED_ERP_PREAMBLE |
2455 BSS_CHANGED_ERP_SLOT |
2456 BSS_CHANGED_HT |
2457 BSS_CHANGED_BASIC_RATES |
2458 BSS_CHANGED_BEACON_INT |
2459 BSS_CHANGED_BSSID |
2460 BSS_CHANGED_CQM |
2461 BSS_CHANGED_QOS |
2462 BSS_CHANGED_IDLE |
2463 BSS_CHANGED_TXPOWER |
2464 BSS_CHANGED_MCAST_RATE;
2465
2466 if (sdata->vif.mu_mimo_owner)
2467 changed |= BSS_CHANGED_MU_GROUPS;
2468
2469 switch (sdata->vif.type) {
2470 case NL80211_IFTYPE_STATION:
2471 changed |= BSS_CHANGED_ASSOC |
2472 BSS_CHANGED_ARP_FILTER |
2473 BSS_CHANGED_PS;
2474
2475 /* Re-send beacon info report to the driver */
2476 if (sdata->u.mgd.have_beacon)
2477 changed |= BSS_CHANGED_BEACON_INFO;
2478
2479 if (sdata->vif.bss_conf.max_idle_period ||
2480 sdata->vif.bss_conf.protected_keep_alive)
2481 changed |= BSS_CHANGED_KEEP_ALIVE;
2482
2483 sdata_lock(sdata);
2484 ieee80211_bss_info_change_notify(sdata, changed);
2485 sdata_unlock(sdata);
2486 break;
2487 case NL80211_IFTYPE_OCB:
2488 changed |= BSS_CHANGED_OCB;
2489 ieee80211_bss_info_change_notify(sdata, changed);
2490 break;
2491 case NL80211_IFTYPE_ADHOC:
2492 changed |= BSS_CHANGED_IBSS;
2493 fallthrough;
2494 case NL80211_IFTYPE_AP:
2495 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2496
2497 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2498 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2499 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2500 changed |= BSS_CHANGED_FTM_RESPONDER;
2501
2502 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2503 changed |= BSS_CHANGED_AP_PROBE_RESP;
2504
2505 if (rcu_access_pointer(sdata->u.ap.beacon))
2506 drv_start_ap(local, sdata);
2507 }
2508 fallthrough;
2509 case NL80211_IFTYPE_MESH_POINT:
2510 if (sdata->vif.bss_conf.enable_beacon) {
2511 changed |= BSS_CHANGED_BEACON |
2512 BSS_CHANGED_BEACON_ENABLED;
2513 ieee80211_bss_info_change_notify(sdata, changed);
2514 }
2515 break;
2516 case NL80211_IFTYPE_NAN:
2517 res = ieee80211_reconfig_nan(sdata);
2518 if (res < 0) {
2519 ieee80211_handle_reconfig_failure(local);
2520 return res;
2521 }
2522 break;
2523 case NL80211_IFTYPE_AP_VLAN:
2524 case NL80211_IFTYPE_MONITOR:
2525 case NL80211_IFTYPE_P2P_DEVICE:
2526 /* nothing to do */
2527 break;
2528 case NL80211_IFTYPE_UNSPECIFIED:
2529 case NUM_NL80211_IFTYPES:
2530 case NL80211_IFTYPE_P2P_CLIENT:
2531 case NL80211_IFTYPE_P2P_GO:
2532 case NL80211_IFTYPE_WDS:
2533 WARN_ON(1);
2534 break;
2535 }
2536 }
2537
2538 ieee80211_recalc_ps(local);
2539
2540 /*
2541 * The sta might be in psm against the ap (e.g. because
2542 * this was the state before a hw restart), so we
2543 * explicitly send a null packet in order to make sure
2544 * it'll sync against the ap (and get out of psm).
2545 */
2546 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2547 list_for_each_entry(sdata, &local->interfaces, list) {
2548 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2549 continue;
2550 if (!sdata->u.mgd.associated)
2551 continue;
2552
2553 ieee80211_send_nullfunc(local, sdata, false);
2554 }
2555 }
2556
2557 /* APs are now beaconing, add back stations */
2558 mutex_lock(&local->sta_mtx);
2559 list_for_each_entry(sta, &local->sta_list, list) {
2560 enum ieee80211_sta_state state;
2561
2562 if (!sta->uploaded)
2563 continue;
2564
2565 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2566 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2567 continue;
2568
2569 for (state = IEEE80211_STA_NOTEXIST;
2570 state < sta->sta_state; state++)
2571 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2572 state + 1));
2573 }
2574 mutex_unlock(&local->sta_mtx);
2575
2576 /* add back keys */
2577 list_for_each_entry(sdata, &local->interfaces, list)
2578 ieee80211_reenable_keys(sdata);
2579
2580 /* Reconfigure sched scan if it was interrupted by FW restart */
2581 mutex_lock(&local->mtx);
2582 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2583 lockdep_is_held(&local->mtx));
2584 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2585 lockdep_is_held(&local->mtx));
2586 if (sched_scan_sdata && sched_scan_req)
2587 /*
2588 * Sched scan stopped, but we don't want to report it. Instead,
2589 * we're trying to reschedule. However, if more than one scan
2590 * plan was set, we cannot reschedule since we don't know which
2591 * scan plan was currently running (and some scan plans may have
2592 * already finished).
2593 */
2594 if (sched_scan_req->n_scan_plans > 1 ||
2595 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2596 sched_scan_req)) {
2597 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2598 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2599 sched_scan_stopped = true;
2600 }
2601 mutex_unlock(&local->mtx);
2602
2603 if (sched_scan_stopped)
2604 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2605
2606 wake_up:
2607
2608 if (local->monitors == local->open_count && local->monitors > 0)
2609 ieee80211_add_virtual_monitor(local);
2610
2611 /*
2612 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2613 * sessions can be established after a resume.
2614 *
2615 * Also tear down aggregation sessions since reconfiguring
2616 * them in a hardware restart scenario is not easily done
2617 * right now, and the hardware will have lost information
2618 * about the sessions, but we and the AP still think they
2619 * are active. This is really a workaround though.
2620 */
2621 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2622 mutex_lock(&local->sta_mtx);
2623
2624 list_for_each_entry(sta, &local->sta_list, list) {
2625 if (!local->resuming)
2626 ieee80211_sta_tear_down_BA_sessions(
2627 sta, AGG_STOP_LOCAL_REQUEST);
2628 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2629 }
2630
2631 mutex_unlock(&local->sta_mtx);
2632 }
2633
2634 if (local->in_reconfig) {
2635 local->in_reconfig = false;
2636 barrier();
2637
2638 /* Restart deferred ROCs */
2639 mutex_lock(&local->mtx);
2640 ieee80211_start_next_roc(local);
2641 mutex_unlock(&local->mtx);
2642
2643 /* Requeue all works */
2644 list_for_each_entry(sdata, &local->interfaces, list)
2645 ieee80211_queue_work(&local->hw, &sdata->work);
2646 }
2647
2648 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2649 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2650 false);
2651
2652 /*
2653 * If this is for hw restart things are still running.
2654 * We may want to change that later, however.
2655 */
2656 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2657 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2658
2659 if (!suspended)
2660 return 0;
2661
2662#ifdef CONFIG_PM
2663 /* first set suspended false, then resuming */
2664 local->suspended = false;
2665 mb();
2666 local->resuming = false;
2667
2668 ieee80211_flush_completed_scan(local, false);
2669
2670 if (local->open_count && !reconfig_due_to_wowlan)
2671 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2672
2673 list_for_each_entry(sdata, &local->interfaces, list) {
2674 if (!ieee80211_sdata_running(sdata))
2675 continue;
2676 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2677 ieee80211_sta_restart(sdata);
2678 }
2679
2680 mod_timer(&local->sta_cleanup, jiffies + 1);
2681#else
2682 WARN_ON(1);
2683#endif
2684
2685 return 0;
2686}
2687
2688void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2689{
2690 struct ieee80211_sub_if_data *sdata;
2691 struct ieee80211_local *local;
2692 struct ieee80211_key *key;
2693
2694 if (WARN_ON(!vif))
2695 return;
2696
2697 sdata = vif_to_sdata(vif);
2698 local = sdata->local;
2699
2700 if (WARN_ON(!local->resuming))
2701 return;
2702
2703 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2704 return;
2705
2706 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2707
2708 mutex_lock(&local->key_mtx);
2709 list_for_each_entry(key, &sdata->key_list, list)
2710 key->flags |= KEY_FLAG_TAINTED;
2711 mutex_unlock(&local->key_mtx);
2712}
2713EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2714
2715void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2716{
2717 struct ieee80211_local *local = sdata->local;
2718 struct ieee80211_chanctx_conf *chanctx_conf;
2719 struct ieee80211_chanctx *chanctx;
2720
2721 mutex_lock(&local->chanctx_mtx);
2722
2723 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2724 lockdep_is_held(&local->chanctx_mtx));
2725
2726 /*
2727 * This function can be called from a work, thus it may be possible
2728 * that the chanctx_conf is removed (due to a disconnection, for
2729 * example).
2730 * So nothing should be done in such case.
2731 */
2732 if (!chanctx_conf)
2733 goto unlock;
2734
2735 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2736 ieee80211_recalc_smps_chanctx(local, chanctx);
2737 unlock:
2738 mutex_unlock(&local->chanctx_mtx);
2739}
2740
2741void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2742{
2743 struct ieee80211_local *local = sdata->local;
2744 struct ieee80211_chanctx_conf *chanctx_conf;
2745 struct ieee80211_chanctx *chanctx;
2746
2747 mutex_lock(&local->chanctx_mtx);
2748
2749 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2750 lockdep_is_held(&local->chanctx_mtx));
2751
2752 if (WARN_ON_ONCE(!chanctx_conf))
2753 goto unlock;
2754
2755 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2756 ieee80211_recalc_chanctx_min_def(local, chanctx);
2757 unlock:
2758 mutex_unlock(&local->chanctx_mtx);
2759}
2760
2761size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2762{
2763 size_t pos = offset;
2764
2765 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2766 pos += 2 + ies[pos + 1];
2767
2768 return pos;
2769}
2770
2771static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2772 int rssi_min_thold,
2773 int rssi_max_thold)
2774{
2775 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2776
2777 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2778 return;
2779
2780 /*
2781 * Scale up threshold values before storing it, as the RSSI averaging
2782 * algorithm uses a scaled up value as well. Change this scaling
2783 * factor if the RSSI averaging algorithm changes.
2784 */
2785 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2786 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2787}
2788
2789void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2790 int rssi_min_thold,
2791 int rssi_max_thold)
2792{
2793 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2794
2795 WARN_ON(rssi_min_thold == rssi_max_thold ||
2796 rssi_min_thold > rssi_max_thold);
2797
2798 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2799 rssi_max_thold);
2800}
2801EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2802
2803void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2804{
2805 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2806
2807 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2808}
2809EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2810
2811u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2812 u16 cap)
2813{
2814 __le16 tmp;
2815
2816 *pos++ = WLAN_EID_HT_CAPABILITY;
2817 *pos++ = sizeof(struct ieee80211_ht_cap);
2818 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2819
2820 /* capability flags */
2821 tmp = cpu_to_le16(cap);
2822 memcpy(pos, &tmp, sizeof(u16));
2823 pos += sizeof(u16);
2824
2825 /* AMPDU parameters */
2826 *pos++ = ht_cap->ampdu_factor |
2827 (ht_cap->ampdu_density <<
2828 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2829
2830 /* MCS set */
2831 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2832 pos += sizeof(ht_cap->mcs);
2833
2834 /* extended capabilities */
2835 pos += sizeof(__le16);
2836
2837 /* BF capabilities */
2838 pos += sizeof(__le32);
2839
2840 /* antenna selection */
2841 pos += sizeof(u8);
2842
2843 return pos;
2844}
2845
2846u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2847 u32 cap)
2848{
2849 __le32 tmp;
2850
2851 *pos++ = WLAN_EID_VHT_CAPABILITY;
2852 *pos++ = sizeof(struct ieee80211_vht_cap);
2853 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2854
2855 /* capability flags */
2856 tmp = cpu_to_le32(cap);
2857 memcpy(pos, &tmp, sizeof(u32));
2858 pos += sizeof(u32);
2859
2860 /* VHT MCS set */
2861 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2862 pos += sizeof(vht_cap->vht_mcs);
2863
2864 return pos;
2865}
2866
2867u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2868{
2869 const struct ieee80211_sta_he_cap *he_cap;
2870 struct ieee80211_supported_band *sband;
2871 u8 n;
2872
2873 sband = ieee80211_get_sband(sdata);
2874 if (!sband)
2875 return 0;
2876
2877 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2878 if (!he_cap)
2879 return 0;
2880
2881 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2882 return 2 + 1 +
2883 sizeof(he_cap->he_cap_elem) + n +
2884 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2885 he_cap->he_cap_elem.phy_cap_info);
2886}
2887
2888u8 *ieee80211_ie_build_he_cap(u8 *pos,
2889 const struct ieee80211_sta_he_cap *he_cap,
2890 u8 *end)
2891{
2892 u8 n;
2893 u8 ie_len;
2894 u8 *orig_pos = pos;
2895
2896 /* Make sure we have place for the IE */
2897 /*
2898 * TODO: the 1 added is because this temporarily is under the EXTENSION
2899 * IE. Get rid of it when it moves.
2900 */
2901 if (!he_cap)
2902 return orig_pos;
2903
2904 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2905 ie_len = 2 + 1 +
2906 sizeof(he_cap->he_cap_elem) + n +
2907 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2908 he_cap->he_cap_elem.phy_cap_info);
2909
2910 if ((end - pos) < ie_len)
2911 return orig_pos;
2912
2913 *pos++ = WLAN_EID_EXTENSION;
2914 pos++; /* We'll set the size later below */
2915 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2916
2917 /* Fixed data */
2918 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2919 pos += sizeof(he_cap->he_cap_elem);
2920
2921 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2922 pos += n;
2923
2924 /* Check if PPE Threshold should be present */
2925 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2926 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2927 goto end;
2928
2929 /*
2930 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2931 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2932 */
2933 n = hweight8(he_cap->ppe_thres[0] &
2934 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2935 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2936 IEEE80211_PPE_THRES_NSS_POS));
2937
2938 /*
2939 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2940 * total size.
2941 */
2942 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2943 n = DIV_ROUND_UP(n, 8);
2944
2945 /* Copy PPE Thresholds */
2946 memcpy(pos, &he_cap->ppe_thres, n);
2947 pos += n;
2948
2949end:
2950 orig_pos[1] = (pos - orig_pos) - 2;
2951 return pos;
2952}
2953
2954void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2955 struct sk_buff *skb)
2956{
2957 struct ieee80211_supported_band *sband;
2958 const struct ieee80211_sband_iftype_data *iftd;
2959 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2960 u8 *pos;
2961 u16 cap;
2962
2963 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2964 BIT(NL80211_BAND_6GHZ),
2965 IEEE80211_CHAN_NO_HE))
2966 return;
2967
2968 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2969
2970 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2971 if (!iftd)
2972 return;
2973
2974 /* Check for device HE 6 GHz capability before adding element */
2975 if (!iftd->he_6ghz_capa.capa)
2976 return;
2977
2978 cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2979 cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2980
2981 switch (sdata->smps_mode) {
2982 case IEEE80211_SMPS_AUTOMATIC:
2983 case IEEE80211_SMPS_NUM_MODES:
2984 WARN_ON(1);
2985 fallthrough;
2986 case IEEE80211_SMPS_OFF:
2987 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2988 IEEE80211_HE_6GHZ_CAP_SM_PS);
2989 break;
2990 case IEEE80211_SMPS_STATIC:
2991 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2992 IEEE80211_HE_6GHZ_CAP_SM_PS);
2993 break;
2994 case IEEE80211_SMPS_DYNAMIC:
2995 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2996 IEEE80211_HE_6GHZ_CAP_SM_PS);
2997 break;
2998 }
2999
3000 pos = skb_put(skb, 2 + 1 + sizeof(cap));
3001 ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3002 pos + 2 + 1 + sizeof(cap));
3003}
3004
3005u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3006 const struct cfg80211_chan_def *chandef,
3007 u16 prot_mode, bool rifs_mode)
3008{
3009 struct ieee80211_ht_operation *ht_oper;
3010 /* Build HT Information */
3011 *pos++ = WLAN_EID_HT_OPERATION;
3012 *pos++ = sizeof(struct ieee80211_ht_operation);
3013 ht_oper = (struct ieee80211_ht_operation *)pos;
3014 ht_oper->primary_chan = ieee80211_frequency_to_channel(
3015 chandef->chan->center_freq);
3016 switch (chandef->width) {
3017 case NL80211_CHAN_WIDTH_160:
3018 case NL80211_CHAN_WIDTH_80P80:
3019 case NL80211_CHAN_WIDTH_80:
3020 case NL80211_CHAN_WIDTH_40:
3021 if (chandef->center_freq1 > chandef->chan->center_freq)
3022 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3023 else
3024 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3025 break;
3026 default:
3027 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3028 break;
3029 }
3030 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3031 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3032 chandef->width != NL80211_CHAN_WIDTH_20)
3033 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3034
3035 if (rifs_mode)
3036 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3037
3038 ht_oper->operation_mode = cpu_to_le16(prot_mode);
3039 ht_oper->stbc_param = 0x0000;
3040
3041 /* It seems that Basic MCS set and Supported MCS set
3042 are identical for the first 10 bytes */
3043 memset(&ht_oper->basic_set, 0, 16);
3044 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3045
3046 return pos + sizeof(struct ieee80211_ht_operation);
3047}
3048
3049void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3050 const struct cfg80211_chan_def *chandef)
3051{
3052 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
3053 *pos++ = 3; /* IE length */
3054 /* New channel width */
3055 switch (chandef->width) {
3056 case NL80211_CHAN_WIDTH_80:
3057 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3058 break;
3059 case NL80211_CHAN_WIDTH_160:
3060 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3061 break;
3062 case NL80211_CHAN_WIDTH_80P80:
3063 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3064 break;
3065 default:
3066 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3067 }
3068
3069 /* new center frequency segment 0 */
3070 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3071 /* new center frequency segment 1 */
3072 if (chandef->center_freq2)
3073 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3074 else
3075 *pos++ = 0;
3076}
3077
3078u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3079 const struct cfg80211_chan_def *chandef)
3080{
3081 struct ieee80211_vht_operation *vht_oper;
3082
3083 *pos++ = WLAN_EID_VHT_OPERATION;
3084 *pos++ = sizeof(struct ieee80211_vht_operation);
3085 vht_oper = (struct ieee80211_vht_operation *)pos;
3086 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3087 chandef->center_freq1);
3088 if (chandef->center_freq2)
3089 vht_oper->center_freq_seg1_idx =
3090 ieee80211_frequency_to_channel(chandef->center_freq2);
3091 else
3092 vht_oper->center_freq_seg1_idx = 0x00;
3093
3094 switch (chandef->width) {
3095 case NL80211_CHAN_WIDTH_160:
3096 /*
3097 * Convert 160 MHz channel width to new style as interop
3098 * workaround.
3099 */
3100 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3101 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3102 if (chandef->chan->center_freq < chandef->center_freq1)
3103 vht_oper->center_freq_seg0_idx -= 8;
3104 else
3105 vht_oper->center_freq_seg0_idx += 8;
3106 break;
3107 case NL80211_CHAN_WIDTH_80P80:
3108 /*
3109 * Convert 80+80 MHz channel width to new style as interop
3110 * workaround.
3111 */
3112 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3113 break;
3114 case NL80211_CHAN_WIDTH_80:
3115 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3116 break;
3117 default:
3118 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3119 break;
3120 }
3121
3122 /* don't require special VHT peer rates */
3123 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3124
3125 return pos + sizeof(struct ieee80211_vht_operation);
3126}
3127
3128u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3129{
3130 struct ieee80211_he_operation *he_oper;
3131 struct ieee80211_he_6ghz_oper *he_6ghz_op;
3132 u32 he_oper_params;
3133 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3134
3135 if (chandef->chan->band == NL80211_BAND_6GHZ)
3136 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3137
3138 *pos++ = WLAN_EID_EXTENSION;
3139 *pos++ = ie_len;
3140 *pos++ = WLAN_EID_EXT_HE_OPERATION;
3141
3142 he_oper_params = 0;
3143 he_oper_params |= u32_encode_bits(1023, /* disabled */
3144 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3145 he_oper_params |= u32_encode_bits(1,
3146 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3147 he_oper_params |= u32_encode_bits(1,
3148 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3149 if (chandef->chan->band == NL80211_BAND_6GHZ)
3150 he_oper_params |= u32_encode_bits(1,
3151 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3152
3153 he_oper = (struct ieee80211_he_operation *)pos;
3154 he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3155
3156 /* don't require special HE peer rates */
3157 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3158 pos += sizeof(struct ieee80211_he_operation);
3159
3160 if (chandef->chan->band != NL80211_BAND_6GHZ)
3161 goto out;
3162
3163 /* TODO add VHT operational */
3164 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3165 he_6ghz_op->minrate = 6; /* 6 Mbps */
3166 he_6ghz_op->primary =
3167 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3168 he_6ghz_op->ccfs0 =
3169 ieee80211_frequency_to_channel(chandef->center_freq1);
3170 if (chandef->center_freq2)
3171 he_6ghz_op->ccfs1 =
3172 ieee80211_frequency_to_channel(chandef->center_freq2);
3173 else
3174 he_6ghz_op->ccfs1 = 0;
3175
3176 switch (chandef->width) {
3177 case NL80211_CHAN_WIDTH_160:
3178 /* Convert 160 MHz channel width to new style as interop
3179 * workaround.
3180 */
3181 he_6ghz_op->control =
3182 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3183 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3184 if (chandef->chan->center_freq < chandef->center_freq1)
3185 he_6ghz_op->ccfs0 -= 8;
3186 else
3187 he_6ghz_op->ccfs0 += 8;
3188 fallthrough;
3189 case NL80211_CHAN_WIDTH_80P80:
3190 he_6ghz_op->control =
3191 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3192 break;
3193 case NL80211_CHAN_WIDTH_80:
3194 he_6ghz_op->control =
3195 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3196 break;
3197 case NL80211_CHAN_WIDTH_40:
3198 he_6ghz_op->control =
3199 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3200 break;
3201 default:
3202 he_6ghz_op->control =
3203 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3204 break;
3205 }
3206
3207 pos += sizeof(struct ieee80211_he_6ghz_oper);
3208
3209out:
3210 return pos;
3211}
3212
3213bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3214 struct cfg80211_chan_def *chandef)
3215{
3216 enum nl80211_channel_type channel_type;
3217
3218 if (!ht_oper)
3219 return false;
3220
3221 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3222 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3223 channel_type = NL80211_CHAN_HT20;
3224 break;
3225 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3226 channel_type = NL80211_CHAN_HT40PLUS;
3227 break;
3228 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3229 channel_type = NL80211_CHAN_HT40MINUS;
3230 break;
3231 default:
3232 channel_type = NL80211_CHAN_NO_HT;
3233 return false;
3234 }
3235
3236 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3237 return true;
3238}
3239
3240bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3241 const struct ieee80211_vht_operation *oper,
3242 const struct ieee80211_ht_operation *htop,
3243 struct cfg80211_chan_def *chandef)
3244{
3245 struct cfg80211_chan_def new = *chandef;
3246 int cf0, cf1;
3247 int ccfs0, ccfs1, ccfs2;
3248 int ccf0, ccf1;
3249 u32 vht_cap;
3250 bool support_80_80 = false;
3251 bool support_160 = false;
3252 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3253 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3254 u8 supp_chwidth = u32_get_bits(vht_cap_info,
3255 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3256
3257 if (!oper || !htop)
3258 return false;
3259
3260 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3261 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3262 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3263 support_80_80 = ((vht_cap &
3264 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3265 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3266 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3267 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3268 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3269 ccfs0 = oper->center_freq_seg0_idx;
3270 ccfs1 = oper->center_freq_seg1_idx;
3271 ccfs2 = (le16_to_cpu(htop->operation_mode) &
3272 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3273 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3274
3275 ccf0 = ccfs0;
3276
3277 /* if not supported, parse as though we didn't understand it */
3278 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3279 ext_nss_bw_supp = 0;
3280
3281 /*
3282 * Cf. IEEE 802.11 Table 9-250
3283 *
3284 * We really just consider that because it's inefficient to connect
3285 * at a higher bandwidth than we'll actually be able to use.
3286 */
3287 switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3288 default:
3289 case 0x00:
3290 ccf1 = 0;
3291 support_160 = false;
3292 support_80_80 = false;
3293 break;
3294 case 0x01:
3295 support_80_80 = false;
3296 fallthrough;
3297 case 0x02:
3298 case 0x03:
3299 ccf1 = ccfs2;
3300 break;
3301 case 0x10:
3302 ccf1 = ccfs1;
3303 break;
3304 case 0x11:
3305 case 0x12:
3306 if (!ccfs1)
3307 ccf1 = ccfs2;
3308 else
3309 ccf1 = ccfs1;
3310 break;
3311 case 0x13:
3312 case 0x20:
3313 case 0x23:
3314 ccf1 = ccfs1;
3315 break;
3316 }
3317
3318 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3319 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3320
3321 switch (oper->chan_width) {
3322 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3323 /* just use HT information directly */
3324 break;
3325 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3326 new.width = NL80211_CHAN_WIDTH_80;
3327 new.center_freq1 = cf0;
3328 /* If needed, adjust based on the newer interop workaround. */
3329 if (ccf1) {
3330 unsigned int diff;
3331
3332 diff = abs(ccf1 - ccf0);
3333 if ((diff == 8) && support_160) {
3334 new.width = NL80211_CHAN_WIDTH_160;
3335 new.center_freq1 = cf1;
3336 } else if ((diff > 8) && support_80_80) {
3337 new.width = NL80211_CHAN_WIDTH_80P80;
3338 new.center_freq2 = cf1;
3339 }
3340 }
3341 break;
3342 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3343 /* deprecated encoding */
3344 new.width = NL80211_CHAN_WIDTH_160;
3345 new.center_freq1 = cf0;
3346 break;
3347 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3348 /* deprecated encoding */
3349 new.width = NL80211_CHAN_WIDTH_80P80;
3350 new.center_freq1 = cf0;
3351 new.center_freq2 = cf1;
3352 break;
3353 default:
3354 return false;
3355 }
3356
3357 if (!cfg80211_chandef_valid(&new))
3358 return false;
3359
3360 *chandef = new;
3361 return true;
3362}
3363
3364bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3365 const struct ieee80211_he_operation *he_oper,
3366 struct cfg80211_chan_def *chandef)
3367{
3368 struct ieee80211_local *local = sdata->local;
3369 struct ieee80211_supported_band *sband;
3370 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3371 const struct ieee80211_sta_he_cap *he_cap;
3372 struct cfg80211_chan_def he_chandef = *chandef;
3373 const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3374 bool support_80_80, support_160;
3375 u8 he_phy_cap;
3376 u32 freq;
3377
3378 if (chandef->chan->band != NL80211_BAND_6GHZ)
3379 return true;
3380
3381 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3382
3383 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3384 if (!he_cap) {
3385 sdata_info(sdata, "Missing iftype sband data/HE cap");
3386 return false;
3387 }
3388
3389 he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3390 support_160 =
3391 he_phy_cap &
3392 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3393 support_80_80 =
3394 he_phy_cap &
3395 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3396
3397 if (!he_oper) {
3398 sdata_info(sdata,
3399 "HE is not advertised on (on %d MHz), expect issues\n",
3400 chandef->chan->center_freq);
3401 return false;
3402 }
3403
3404 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3405
3406 if (!he_6ghz_oper) {
3407 sdata_info(sdata,
3408 "HE 6GHz operation missing (on %d MHz), expect issues\n",
3409 chandef->chan->center_freq);
3410 return false;
3411 }
3412
3413 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3414 NL80211_BAND_6GHZ);
3415 he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3416
3417 switch (u8_get_bits(he_6ghz_oper->control,
3418 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3419 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3420 he_chandef.width = NL80211_CHAN_WIDTH_20;
3421 break;
3422 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3423 he_chandef.width = NL80211_CHAN_WIDTH_40;
3424 break;
3425 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3426 he_chandef.width = NL80211_CHAN_WIDTH_80;
3427 break;
3428 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3429 he_chandef.width = NL80211_CHAN_WIDTH_80;
3430 if (!he_6ghz_oper->ccfs1)
3431 break;
3432 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3433 if (support_160)
3434 he_chandef.width = NL80211_CHAN_WIDTH_160;
3435 } else {
3436 if (support_80_80)
3437 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3438 }
3439 break;
3440 }
3441
3442 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3443 he_chandef.center_freq1 =
3444 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3445 NL80211_BAND_6GHZ);
3446 } else {
3447 he_chandef.center_freq1 =
3448 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3449 NL80211_BAND_6GHZ);
3450 if (support_80_80 || support_160)
3451 he_chandef.center_freq2 =
3452 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3453 NL80211_BAND_6GHZ);
3454 }
3455
3456 if (!cfg80211_chandef_valid(&he_chandef)) {
3457 sdata_info(sdata,
3458 "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3459 he_chandef.chan ? he_chandef.chan->center_freq : 0,
3460 he_chandef.width,
3461 he_chandef.center_freq1,
3462 he_chandef.center_freq2);
3463 return false;
3464 }
3465
3466 *chandef = he_chandef;
3467
3468 return true;
3469}
3470
3471bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3472 struct cfg80211_chan_def *chandef)
3473{
3474 u32 oper_freq;
3475
3476 if (!oper)
3477 return false;
3478
3479 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3480 case IEEE80211_S1G_CHANWIDTH_1MHZ:
3481 chandef->width = NL80211_CHAN_WIDTH_1;
3482 break;
3483 case IEEE80211_S1G_CHANWIDTH_2MHZ:
3484 chandef->width = NL80211_CHAN_WIDTH_2;
3485 break;
3486 case IEEE80211_S1G_CHANWIDTH_4MHZ:
3487 chandef->width = NL80211_CHAN_WIDTH_4;
3488 break;
3489 case IEEE80211_S1G_CHANWIDTH_8MHZ:
3490 chandef->width = NL80211_CHAN_WIDTH_8;
3491 break;
3492 case IEEE80211_S1G_CHANWIDTH_16MHZ:
3493 chandef->width = NL80211_CHAN_WIDTH_16;
3494 break;
3495 default:
3496 return false;
3497 }
3498
3499 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3500 NL80211_BAND_S1GHZ);
3501 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3502 chandef->freq1_offset = oper_freq % 1000;
3503
3504 return true;
3505}
3506
3507int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3508 const struct ieee80211_supported_band *sband,
3509 const u8 *srates, int srates_len, u32 *rates)
3510{
3511 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3512 int shift = ieee80211_chandef_get_shift(chandef);
3513 struct ieee80211_rate *br;
3514 int brate, rate, i, j, count = 0;
3515
3516 *rates = 0;
3517
3518 for (i = 0; i < srates_len; i++) {
3519 rate = srates[i] & 0x7f;
3520
3521 for (j = 0; j < sband->n_bitrates; j++) {
3522 br = &sband->bitrates[j];
3523 if ((rate_flags & br->flags) != rate_flags)
3524 continue;
3525
3526 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3527 if (brate == rate) {
3528 *rates |= BIT(j);
3529 count++;
3530 break;
3531 }
3532 }
3533 }
3534 return count;
3535}
3536
3537int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3538 struct sk_buff *skb, bool need_basic,
3539 enum nl80211_band band)
3540{
3541 struct ieee80211_local *local = sdata->local;
3542 struct ieee80211_supported_band *sband;
3543 int rate, shift;
3544 u8 i, rates, *pos;
3545 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3546 u32 rate_flags;
3547
3548 shift = ieee80211_vif_get_shift(&sdata->vif);
3549 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3550 sband = local->hw.wiphy->bands[band];
3551 rates = 0;
3552 for (i = 0; i < sband->n_bitrates; i++) {
3553 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3554 continue;
3555 rates++;
3556 }
3557 if (rates > 8)
3558 rates = 8;
3559
3560 if (skb_tailroom(skb) < rates + 2)
3561 return -ENOMEM;
3562
3563 pos = skb_put(skb, rates + 2);
3564 *pos++ = WLAN_EID_SUPP_RATES;
3565 *pos++ = rates;
3566 for (i = 0; i < rates; i++) {
3567 u8 basic = 0;
3568 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3569 continue;
3570
3571 if (need_basic && basic_rates & BIT(i))
3572 basic = 0x80;
3573 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3574 5 * (1 << shift));
3575 *pos++ = basic | (u8) rate;
3576 }
3577
3578 return 0;
3579}
3580
3581int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3582 struct sk_buff *skb, bool need_basic,
3583 enum nl80211_band band)
3584{
3585 struct ieee80211_local *local = sdata->local;
3586 struct ieee80211_supported_band *sband;
3587 int rate, shift;
3588 u8 i, exrates, *pos;
3589 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3590 u32 rate_flags;
3591
3592 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3593 shift = ieee80211_vif_get_shift(&sdata->vif);
3594
3595 sband = local->hw.wiphy->bands[band];
3596 exrates = 0;
3597 for (i = 0; i < sband->n_bitrates; i++) {
3598 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3599 continue;
3600 exrates++;
3601 }
3602
3603 if (exrates > 8)
3604 exrates -= 8;
3605 else
3606 exrates = 0;
3607
3608 if (skb_tailroom(skb) < exrates + 2)
3609 return -ENOMEM;
3610
3611 if (exrates) {
3612 pos = skb_put(skb, exrates + 2);
3613 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3614 *pos++ = exrates;
3615 for (i = 8; i < sband->n_bitrates; i++) {
3616 u8 basic = 0;
3617 if ((rate_flags & sband->bitrates[i].flags)
3618 != rate_flags)
3619 continue;
3620 if (need_basic && basic_rates & BIT(i))
3621 basic = 0x80;
3622 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3623 5 * (1 << shift));
3624 *pos++ = basic | (u8) rate;
3625 }
3626 }
3627 return 0;
3628}
3629
3630int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3631{
3632 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3633 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3634
3635 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3636 /* non-managed type inferfaces */
3637 return 0;
3638 }
3639 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3640}
3641EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3642
3643u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3644{
3645 if (!mcs)
3646 return 1;
3647
3648 /* TODO: consider rx_highest */
3649
3650 if (mcs->rx_mask[3])
3651 return 4;
3652 if (mcs->rx_mask[2])
3653 return 3;
3654 if (mcs->rx_mask[1])
3655 return 2;
3656 return 1;
3657}
3658
3659/**
3660 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3661 * @local: mac80211 hw info struct
3662 * @status: RX status
3663 * @mpdu_len: total MPDU length (including FCS)
3664 * @mpdu_offset: offset into MPDU to calculate timestamp at
3665 *
3666 * This function calculates the RX timestamp at the given MPDU offset, taking
3667 * into account what the RX timestamp was. An offset of 0 will just normalize
3668 * the timestamp to TSF at beginning of MPDU reception.
3669 */
3670u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3671 struct ieee80211_rx_status *status,
3672 unsigned int mpdu_len,
3673 unsigned int mpdu_offset)
3674{
3675 u64 ts = status->mactime;
3676 struct rate_info ri;
3677 u16 rate;
3678 u8 n_ltf;
3679
3680 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3681 return 0;
3682
3683 memset(&ri, 0, sizeof(ri));
3684
3685 ri.bw = status->bw;
3686
3687 /* Fill cfg80211 rate info */
3688 switch (status->encoding) {
3689 case RX_ENC_HE:
3690 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3691 ri.mcs = status->rate_idx;
3692 ri.nss = status->nss;
3693 ri.he_ru_alloc = status->he_ru;
3694 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3695 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3696
3697 /*
3698 * See P802.11ax_D6.0, section 27.3.4 for
3699 * VHT PPDU format.
3700 */
3701 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3702 mpdu_offset += 2;
3703 ts += 36;
3704
3705 /*
3706 * TODO:
3707 * For HE MU PPDU, add the HE-SIG-B.
3708 * For HE ER PPDU, add 8us for the HE-SIG-A.
3709 * For HE TB PPDU, add 4us for the HE-STF.
3710 * Add the HE-LTF durations - variable.
3711 */
3712 }
3713
3714 break;
3715 case RX_ENC_HT:
3716 ri.mcs = status->rate_idx;
3717 ri.flags |= RATE_INFO_FLAGS_MCS;
3718 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3719 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3720
3721 /*
3722 * See P802.11REVmd_D3.0, section 19.3.2 for
3723 * HT PPDU format.
3724 */
3725 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3726 mpdu_offset += 2;
3727 if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3728 ts += 24;
3729 else
3730 ts += 32;
3731
3732 /*
3733 * Add Data HT-LTFs per streams
3734 * TODO: add Extension HT-LTFs, 4us per LTF
3735 */
3736 n_ltf = ((ri.mcs >> 3) & 3) + 1;
3737 n_ltf = n_ltf == 3 ? 4 : n_ltf;
3738 ts += n_ltf * 4;
3739 }
3740
3741 break;
3742 case RX_ENC_VHT:
3743 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3744 ri.mcs = status->rate_idx;
3745 ri.nss = status->nss;
3746 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3747 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3748
3749 /*
3750 * See P802.11REVmd_D3.0, section 21.3.2 for
3751 * VHT PPDU format.
3752 */
3753 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3754 mpdu_offset += 2;
3755 ts += 36;
3756
3757 /*
3758 * Add VHT-LTFs per streams
3759 */
3760 n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3761 ri.nss + 1 : ri.nss;
3762 ts += 4 * n_ltf;
3763 }
3764
3765 break;
3766 default:
3767 WARN_ON(1);
3768 fallthrough;
3769 case RX_ENC_LEGACY: {
3770 struct ieee80211_supported_band *sband;
3771 int shift = 0;
3772 int bitrate;
3773
3774 switch (status->bw) {
3775 case RATE_INFO_BW_10:
3776 shift = 1;
3777 break;
3778 case RATE_INFO_BW_5:
3779 shift = 2;
3780 break;
3781 }
3782
3783 sband = local->hw.wiphy->bands[status->band];
3784 bitrate = sband->bitrates[status->rate_idx].bitrate;
3785 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3786
3787 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3788 if (status->band == NL80211_BAND_5GHZ) {
3789 ts += 20 << shift;
3790 mpdu_offset += 2;
3791 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3792 ts += 96;
3793 } else {
3794 ts += 192;
3795 }
3796 }
3797 break;
3798 }
3799 }
3800
3801 rate = cfg80211_calculate_bitrate(&ri);
3802 if (WARN_ONCE(!rate,
3803 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3804 (unsigned long long)status->flag, status->rate_idx,
3805 status->nss))
3806 return 0;
3807
3808 /* rewind from end of MPDU */
3809 if (status->flag & RX_FLAG_MACTIME_END)
3810 ts -= mpdu_len * 8 * 10 / rate;
3811
3812 ts += mpdu_offset * 8 * 10 / rate;
3813
3814 return ts;
3815}
3816
3817void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3818{
3819 struct ieee80211_sub_if_data *sdata;
3820 struct cfg80211_chan_def chandef;
3821
3822 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3823 lockdep_assert_wiphy(local->hw.wiphy);
3824
3825 mutex_lock(&local->mtx);
3826 list_for_each_entry(sdata, &local->interfaces, list) {
3827 /* it might be waiting for the local->mtx, but then
3828 * by the time it gets it, sdata->wdev.cac_started
3829 * will no longer be true
3830 */
3831 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3832
3833 if (sdata->wdev.cac_started) {
3834 chandef = sdata->vif.bss_conf.chandef;
3835 ieee80211_vif_release_channel(sdata);
3836 cfg80211_cac_event(sdata->dev,
3837 &chandef,
3838 NL80211_RADAR_CAC_ABORTED,
3839 GFP_KERNEL);
3840 }
3841 }
3842 mutex_unlock(&local->mtx);
3843}
3844
3845void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3846{
3847 struct ieee80211_local *local =
3848 container_of(work, struct ieee80211_local, radar_detected_work);
3849 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3850 struct ieee80211_chanctx *ctx;
3851 int num_chanctx = 0;
3852
3853 mutex_lock(&local->chanctx_mtx);
3854 list_for_each_entry(ctx, &local->chanctx_list, list) {
3855 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3856 continue;
3857
3858 num_chanctx++;
3859 chandef = ctx->conf.def;
3860 }
3861 mutex_unlock(&local->chanctx_mtx);
3862
3863 wiphy_lock(local->hw.wiphy);
3864 ieee80211_dfs_cac_cancel(local);
3865 wiphy_unlock(local->hw.wiphy);
3866
3867 if (num_chanctx > 1)
3868 /* XXX: multi-channel is not supported yet */
3869 WARN_ON(1);
3870 else
3871 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3872}
3873
3874void ieee80211_radar_detected(struct ieee80211_hw *hw)
3875{
3876 struct ieee80211_local *local = hw_to_local(hw);
3877
3878 trace_api_radar_detected(local);
3879
3880 schedule_work(&local->radar_detected_work);
3881}
3882EXPORT_SYMBOL(ieee80211_radar_detected);
3883
3884u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3885{
3886 u32 ret;
3887 int tmp;
3888
3889 switch (c->width) {
3890 case NL80211_CHAN_WIDTH_20:
3891 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3892 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3893 break;
3894 case NL80211_CHAN_WIDTH_40:
3895 c->width = NL80211_CHAN_WIDTH_20;
3896 c->center_freq1 = c->chan->center_freq;
3897 ret = IEEE80211_STA_DISABLE_40MHZ |
3898 IEEE80211_STA_DISABLE_VHT;
3899 break;
3900 case NL80211_CHAN_WIDTH_80:
3901 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3902 /* n_P40 */
3903 tmp /= 2;
3904 /* freq_P40 */
3905 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3906 c->width = NL80211_CHAN_WIDTH_40;
3907 ret = IEEE80211_STA_DISABLE_VHT;
3908 break;
3909 case NL80211_CHAN_WIDTH_80P80:
3910 c->center_freq2 = 0;
3911 c->width = NL80211_CHAN_WIDTH_80;
3912 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3913 IEEE80211_STA_DISABLE_160MHZ;
3914 break;
3915 case NL80211_CHAN_WIDTH_160:
3916 /* n_P20 */
3917 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3918 /* n_P80 */
3919 tmp /= 4;
3920 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3921 c->width = NL80211_CHAN_WIDTH_80;
3922 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3923 IEEE80211_STA_DISABLE_160MHZ;
3924 break;
3925 default:
3926 case NL80211_CHAN_WIDTH_20_NOHT:
3927 WARN_ON_ONCE(1);
3928 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3929 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3930 break;
3931 case NL80211_CHAN_WIDTH_1:
3932 case NL80211_CHAN_WIDTH_2:
3933 case NL80211_CHAN_WIDTH_4:
3934 case NL80211_CHAN_WIDTH_8:
3935 case NL80211_CHAN_WIDTH_16:
3936 case NL80211_CHAN_WIDTH_5:
3937 case NL80211_CHAN_WIDTH_10:
3938 WARN_ON_ONCE(1);
3939 /* keep c->width */
3940 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3941 break;
3942 }
3943
3944 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3945
3946 return ret;
3947}
3948
3949/*
3950 * Returns true if smps_mode_new is strictly more restrictive than
3951 * smps_mode_old.
3952 */
3953bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3954 enum ieee80211_smps_mode smps_mode_new)
3955{
3956 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3957 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3958 return false;
3959
3960 switch (smps_mode_old) {
3961 case IEEE80211_SMPS_STATIC:
3962 return false;
3963 case IEEE80211_SMPS_DYNAMIC:
3964 return smps_mode_new == IEEE80211_SMPS_STATIC;
3965 case IEEE80211_SMPS_OFF:
3966 return smps_mode_new != IEEE80211_SMPS_OFF;
3967 default:
3968 WARN_ON(1);
3969 }
3970
3971 return false;
3972}
3973
3974int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3975 struct cfg80211_csa_settings *csa_settings)
3976{
3977 struct sk_buff *skb;
3978 struct ieee80211_mgmt *mgmt;
3979 struct ieee80211_local *local = sdata->local;
3980 int freq;
3981 int hdr_len = offsetofend(struct ieee80211_mgmt,
3982 u.action.u.chan_switch);
3983 u8 *pos;
3984
3985 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3986 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3987 return -EOPNOTSUPP;
3988
3989 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3990 5 + /* channel switch announcement element */
3991 3 + /* secondary channel offset element */
3992 5 + /* wide bandwidth channel switch announcement */
3993 8); /* mesh channel switch parameters element */
3994 if (!skb)
3995 return -ENOMEM;
3996
3997 skb_reserve(skb, local->tx_headroom);
3998 mgmt = skb_put_zero(skb, hdr_len);
3999 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4000 IEEE80211_STYPE_ACTION);
4001
4002 eth_broadcast_addr(mgmt->da);
4003 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4004 if (ieee80211_vif_is_mesh(&sdata->vif)) {
4005 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4006 } else {
4007 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4008 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4009 }
4010 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4011 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4012 pos = skb_put(skb, 5);
4013 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
4014 *pos++ = 3; /* IE length */
4015 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
4016 freq = csa_settings->chandef.chan->center_freq;
4017 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
4018 *pos++ = csa_settings->count; /* count */
4019
4020 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4021 enum nl80211_channel_type ch_type;
4022
4023 skb_put(skb, 3);
4024 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
4025 *pos++ = 1; /* IE length */
4026 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4027 if (ch_type == NL80211_CHAN_HT40PLUS)
4028 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4029 else
4030 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4031 }
4032
4033 if (ieee80211_vif_is_mesh(&sdata->vif)) {
4034 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4035
4036 skb_put(skb, 8);
4037 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
4038 *pos++ = 6; /* IE length */
4039 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
4040 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
4041 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4042 *pos++ |= csa_settings->block_tx ?
4043 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4044 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4045 pos += 2;
4046 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4047 pos += 2;
4048 }
4049
4050 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4051 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4052 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4053 skb_put(skb, 5);
4054 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4055 }
4056
4057 ieee80211_tx_skb(sdata, skb);
4058 return 0;
4059}
4060
4061bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4062{
4063 return !(cs == NULL || cs->cipher == 0 ||
4064 cs->hdr_len < cs->pn_len + cs->pn_off ||
4065 cs->hdr_len <= cs->key_idx_off ||
4066 cs->key_idx_shift > 7 ||
4067 cs->key_idx_mask == 0);
4068}
4069
4070bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4071{
4072 int i;
4073
4074 /* Ensure we have enough iftype bitmap space for all iftype values */
4075 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4076
4077 for (i = 0; i < n; i++)
4078 if (!ieee80211_cs_valid(&cs[i]))
4079 return false;
4080
4081 return true;
4082}
4083
4084const struct ieee80211_cipher_scheme *
4085ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4086 enum nl80211_iftype iftype)
4087{
4088 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4089 int n = local->hw.n_cipher_schemes;
4090 int i;
4091 const struct ieee80211_cipher_scheme *cs = NULL;
4092
4093 for (i = 0; i < n; i++) {
4094 if (l[i].cipher == cipher) {
4095 cs = &l[i];
4096 break;
4097 }
4098 }
4099
4100 if (!cs || !(cs->iftype & BIT(iftype)))
4101 return NULL;
4102
4103 return cs;
4104}
4105
4106int ieee80211_cs_headroom(struct ieee80211_local *local,
4107 struct cfg80211_crypto_settings *crypto,
4108 enum nl80211_iftype iftype)
4109{
4110 const struct ieee80211_cipher_scheme *cs;
4111 int headroom = IEEE80211_ENCRYPT_HEADROOM;
4112 int i;
4113
4114 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4115 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4116 iftype);
4117
4118 if (cs && headroom < cs->hdr_len)
4119 headroom = cs->hdr_len;
4120 }
4121
4122 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4123 if (cs && headroom < cs->hdr_len)
4124 headroom = cs->hdr_len;
4125
4126 return headroom;
4127}
4128
4129static bool
4130ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4131{
4132 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4133 int skip;
4134
4135 if (end > 0)
4136 return false;
4137
4138 /* One shot NOA */
4139 if (data->count[i] == 1)
4140 return false;
4141
4142 if (data->desc[i].interval == 0)
4143 return false;
4144
4145 /* End time is in the past, check for repetitions */
4146 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4147 if (data->count[i] < 255) {
4148 if (data->count[i] <= skip) {
4149 data->count[i] = 0;
4150 return false;
4151 }
4152
4153 data->count[i] -= skip;
4154 }
4155
4156 data->desc[i].start += skip * data->desc[i].interval;
4157
4158 return true;
4159}
4160
4161static bool
4162ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4163 s32 *offset)
4164{
4165 bool ret = false;
4166 int i;
4167
4168 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4169 s32 cur;
4170
4171 if (!data->count[i])
4172 continue;
4173
4174 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4175 ret = true;
4176
4177 cur = data->desc[i].start - tsf;
4178 if (cur > *offset)
4179 continue;
4180
4181 cur = data->desc[i].start + data->desc[i].duration - tsf;
4182 if (cur > *offset)
4183 *offset = cur;
4184 }
4185
4186 return ret;
4187}
4188
4189static u32
4190ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4191{
4192 s32 offset = 0;
4193 int tries = 0;
4194 /*
4195 * arbitrary limit, used to avoid infinite loops when combined NoA
4196 * descriptors cover the full time period.
4197 */
4198 int max_tries = 5;
4199
4200 ieee80211_extend_absent_time(data, tsf, &offset);
4201 do {
4202 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4203 break;
4204
4205 tries++;
4206 } while (tries < max_tries);
4207
4208 return offset;
4209}
4210
4211void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4212{
4213 u32 next_offset = BIT(31) - 1;
4214 int i;
4215
4216 data->absent = 0;
4217 data->has_next_tsf = false;
4218 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4219 s32 start;
4220
4221 if (!data->count[i])
4222 continue;
4223
4224 ieee80211_extend_noa_desc(data, tsf, i);
4225 start = data->desc[i].start - tsf;
4226 if (start <= 0)
4227 data->absent |= BIT(i);
4228
4229 if (next_offset > start)
4230 next_offset = start;
4231
4232 data->has_next_tsf = true;
4233 }
4234
4235 if (data->absent)
4236 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4237
4238 data->next_tsf = tsf + next_offset;
4239}
4240EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4241
4242int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4243 struct ieee80211_noa_data *data, u32 tsf)
4244{
4245 int ret = 0;
4246 int i;
4247
4248 memset(data, 0, sizeof(*data));
4249
4250 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4251 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4252
4253 if (!desc->count || !desc->duration)
4254 continue;
4255
4256 data->count[i] = desc->count;
4257 data->desc[i].start = le32_to_cpu(desc->start_time);
4258 data->desc[i].duration = le32_to_cpu(desc->duration);
4259 data->desc[i].interval = le32_to_cpu(desc->interval);
4260
4261 if (data->count[i] > 1 &&
4262 data->desc[i].interval < data->desc[i].duration)
4263 continue;
4264
4265 ieee80211_extend_noa_desc(data, tsf, i);
4266 ret++;
4267 }
4268
4269 if (ret)
4270 ieee80211_update_p2p_noa(data, tsf);
4271
4272 return ret;
4273}
4274EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4275
4276void ieee80211_recalc_dtim(struct ieee80211_local *local,
4277 struct ieee80211_sub_if_data *sdata)
4278{
4279 u64 tsf = drv_get_tsf(local, sdata);
4280 u64 dtim_count = 0;
4281 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4282 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4283 struct ps_data *ps;
4284 u8 bcns_from_dtim;
4285
4286 if (tsf == -1ULL || !beacon_int || !dtim_period)
4287 return;
4288
4289 if (sdata->vif.type == NL80211_IFTYPE_AP ||
4290 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4291 if (!sdata->bss)
4292 return;
4293
4294 ps = &sdata->bss->ps;
4295 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4296 ps = &sdata->u.mesh.ps;
4297 } else {
4298 return;
4299 }
4300
4301 /*
4302 * actually finds last dtim_count, mac80211 will update in
4303 * __beacon_add_tim().
4304 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4305 */
4306 do_div(tsf, beacon_int);
4307 bcns_from_dtim = do_div(tsf, dtim_period);
4308 /* just had a DTIM */
4309 if (!bcns_from_dtim)
4310 dtim_count = 0;
4311 else
4312 dtim_count = dtim_period - bcns_from_dtim;
4313
4314 ps->dtim_count = dtim_count;
4315}
4316
4317static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4318 struct ieee80211_chanctx *ctx)
4319{
4320 struct ieee80211_sub_if_data *sdata;
4321 u8 radar_detect = 0;
4322
4323 lockdep_assert_held(&local->chanctx_mtx);
4324
4325 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4326 return 0;
4327
4328 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4329 if (sdata->reserved_radar_required)
4330 radar_detect |= BIT(sdata->reserved_chandef.width);
4331
4332 /*
4333 * An in-place reservation context should not have any assigned vifs
4334 * until it replaces the other context.
4335 */
4336 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4337 !list_empty(&ctx->assigned_vifs));
4338
4339 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4340 if (sdata->radar_required)
4341 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4342
4343 return radar_detect;
4344}
4345
4346int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4347 const struct cfg80211_chan_def *chandef,
4348 enum ieee80211_chanctx_mode chanmode,
4349 u8 radar_detect)
4350{
4351 struct ieee80211_local *local = sdata->local;
4352 struct ieee80211_sub_if_data *sdata_iter;
4353 enum nl80211_iftype iftype = sdata->wdev.iftype;
4354 struct ieee80211_chanctx *ctx;
4355 int total = 1;
4356 struct iface_combination_params params = {
4357 .radar_detect = radar_detect,
4358 };
4359
4360 lockdep_assert_held(&local->chanctx_mtx);
4361
4362 if (WARN_ON(hweight32(radar_detect) > 1))
4363 return -EINVAL;
4364
4365 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4366 !chandef->chan))
4367 return -EINVAL;
4368
4369 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4370 return -EINVAL;
4371
4372 if (sdata->vif.type == NL80211_IFTYPE_AP ||
4373 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4374 /*
4375 * always passing this is harmless, since it'll be the
4376 * same value that cfg80211 finds if it finds the same
4377 * interface ... and that's always allowed
4378 */
4379 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4380 }
4381
4382 /* Always allow software iftypes */
4383 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4384 if (radar_detect)
4385 return -EINVAL;
4386 return 0;
4387 }
4388
4389 if (chandef)
4390 params.num_different_channels = 1;
4391
4392 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4393 params.iftype_num[iftype] = 1;
4394
4395 list_for_each_entry(ctx, &local->chanctx_list, list) {
4396 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4397 continue;
4398 params.radar_detect |=
4399 ieee80211_chanctx_radar_detect(local, ctx);
4400 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4401 params.num_different_channels++;
4402 continue;
4403 }
4404 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4405 cfg80211_chandef_compatible(chandef,
4406 &ctx->conf.def))
4407 continue;
4408 params.num_different_channels++;
4409 }
4410
4411 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4412 struct wireless_dev *wdev_iter;
4413
4414 wdev_iter = &sdata_iter->wdev;
4415
4416 if (sdata_iter == sdata ||
4417 !ieee80211_sdata_running(sdata_iter) ||
4418 cfg80211_iftype_allowed(local->hw.wiphy,
4419 wdev_iter->iftype, 0, 1))
4420 continue;
4421
4422 params.iftype_num[wdev_iter->iftype]++;
4423 total++;
4424 }
4425
4426 if (total == 1 && !params.radar_detect)
4427 return 0;
4428
4429 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
4430}
4431
4432static void
4433ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4434 void *data)
4435{
4436 u32 *max_num_different_channels = data;
4437
4438 *max_num_different_channels = max(*max_num_different_channels,
4439 c->num_different_channels);
4440}
4441
4442int ieee80211_max_num_channels(struct ieee80211_local *local)
4443{
4444 struct ieee80211_sub_if_data *sdata;
4445 struct ieee80211_chanctx *ctx;
4446 u32 max_num_different_channels = 1;
4447 int err;
4448 struct iface_combination_params params = {0};
4449
4450 lockdep_assert_held(&local->chanctx_mtx);
4451
4452 list_for_each_entry(ctx, &local->chanctx_list, list) {
4453 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4454 continue;
4455
4456 params.num_different_channels++;
4457
4458 params.radar_detect |=
4459 ieee80211_chanctx_radar_detect(local, ctx);
4460 }
4461
4462 list_for_each_entry_rcu(sdata, &local->interfaces, list)
4463 params.iftype_num[sdata->wdev.iftype]++;
4464
4465 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
4466 ieee80211_iter_max_chans,
4467 &max_num_different_channels);
4468 if (err < 0)
4469 return err;
4470
4471 return max_num_different_channels;
4472}
4473
4474void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4475 struct ieee80211_sta_s1g_cap *caps,
4476 struct sk_buff *skb)
4477{
4478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4479 struct ieee80211_s1g_cap s1g_capab;
4480 u8 *pos;
4481 int i;
4482
4483 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4484 return;
4485
4486 if (!caps->s1g)
4487 return;
4488
4489 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4490 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4491
4492 /* override the capability info */
4493 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4494 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4495
4496 s1g_capab.capab_info[i] &= ~mask;
4497 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4498 }
4499
4500 /* then MCS and NSS set */
4501 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4502 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4503
4504 s1g_capab.supp_mcs_nss[i] &= ~mask;
4505 s1g_capab.supp_mcs_nss[i] |=
4506 ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4507 }
4508
4509 pos = skb_put(skb, 2 + sizeof(s1g_capab));
4510 *pos++ = WLAN_EID_S1G_CAPABILITIES;
4511 *pos++ = sizeof(s1g_capab);
4512
4513 memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4514}
4515
4516void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4517 struct sk_buff *skb)
4518{
4519 u8 *pos = skb_put(skb, 3);
4520
4521 *pos++ = WLAN_EID_AID_REQUEST;
4522 *pos++ = 1;
4523 *pos++ = 0;
4524}
4525
4526u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4527{
4528 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4529 *buf++ = 7; /* len */
4530 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4531 *buf++ = 0x50;
4532 *buf++ = 0xf2;
4533 *buf++ = 2; /* WME */
4534 *buf++ = 0; /* WME info */
4535 *buf++ = 1; /* WME ver */
4536 *buf++ = qosinfo; /* U-APSD no in use */
4537
4538 return buf;
4539}
4540
4541void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4542 unsigned long *frame_cnt,
4543 unsigned long *byte_cnt)
4544{
4545 struct txq_info *txqi = to_txq_info(txq);
4546 u32 frag_cnt = 0, frag_bytes = 0;
4547 struct sk_buff *skb;
4548
4549 skb_queue_walk(&txqi->frags, skb) {
4550 frag_cnt++;
4551 frag_bytes += skb->len;
4552 }
4553
4554 if (frame_cnt)
4555 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4556
4557 if (byte_cnt)
4558 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4559}
4560EXPORT_SYMBOL(ieee80211_txq_get_depth);
4561
4562const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4563 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4564 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4565 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4566 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4567};
4568
4569u16 ieee80211_encode_usf(int listen_interval)
4570{
4571 static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4572 u16 ui, usf = 0;
4573
4574 /* find greatest USF */
4575 while (usf < IEEE80211_MAX_USF) {
4576 if (listen_interval % listen_int_usf[usf + 1])
4577 break;
4578 usf += 1;
4579 }
4580 ui = listen_interval / listen_int_usf[usf];
4581
4582 /* error if there is a remainder. Should've been checked by user */
4583 WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4584 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4585 FIELD_PREP(LISTEN_INT_UI, ui);
4586
4587 return (u16) listen_interval;
4588}
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 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
16#include <linux/export.h>
17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
22#include <linux/bitmap.h>
23#include <linux/crc32.h>
24#include <net/net_namespace.h>
25#include <net/cfg80211.h>
26#include <net/rtnetlink.h>
27
28#include "ieee80211_i.h"
29#include "driver-ops.h"
30#include "rate.h"
31#include "mesh.h"
32#include "wme.h"
33#include "led.h"
34#include "wep.h"
35
36/* privid for wiphys to determine whether they belong to us or not */
37const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50 enum nl80211_iftype type)
51{
52 __le16 fc = hdr->frame_control;
53
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
56 return NULL;
57
58 if (ieee80211_is_data(fc)) {
59 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
61
62 if (ieee80211_has_a4(fc))
63 return NULL;
64 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
67 return hdr->addr2;
68
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
73 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
75 return hdr->addr3;
76 }
77
78 if (ieee80211_is_ctl(fc)) {
79 if (ieee80211_is_pspoll(fc))
80 return hdr->addr1;
81
82 if (ieee80211_is_back_req(fc)) {
83 switch (type) {
84 case NL80211_IFTYPE_STATION:
85 return hdr->addr2;
86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
88 return hdr->addr1;
89 default:
90 break; /* fall through to the return */
91 }
92 }
93 }
94
95 return NULL;
96}
97
98void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
99{
100 struct sk_buff *skb;
101 struct ieee80211_hdr *hdr;
102
103 skb_queue_walk(&tx->skbs, skb) {
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
106 }
107}
108
109int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
110 int rate, int erp, int short_preamble,
111 int shift)
112{
113 int dur;
114
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
118 * also include SIFS.
119 *
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
122 *
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
125 */
126
127 if (band == IEEE80211_BAND_5GHZ || erp) {
128 /*
129 * OFDM:
130 *
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
135 *
136 * T_SYM = 4 usec
137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
140 */
141 dur = 16; /* SIFS + signal ext */
142 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
144
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
148 */
149 dur *= 1 << shift;
150
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
153 */
154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
155 4 * rate); /* T_SYM x N_SYM */
156 } else {
157 /*
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
161 *
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
166 */
167 dur = 10; /* aSIFSTime = 10 usec */
168 dur += short_preamble ? (72 + 24) : (144 + 48);
169
170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
171 }
172
173 return dur;
174}
175
176/* Exported duration function for driver use */
177__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
178 struct ieee80211_vif *vif,
179 enum ieee80211_band band,
180 size_t frame_len,
181 struct ieee80211_rate *rate)
182{
183 struct ieee80211_sub_if_data *sdata;
184 u16 dur;
185 int erp, shift = 0;
186 bool short_preamble = false;
187
188 erp = 0;
189 if (vif) {
190 sdata = vif_to_sdata(vif);
191 short_preamble = sdata->vif.bss_conf.use_short_preamble;
192 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
193 erp = rate->flags & IEEE80211_RATE_ERP_G;
194 shift = ieee80211_vif_get_shift(vif);
195 }
196
197 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
198 short_preamble, shift);
199
200 return cpu_to_le16(dur);
201}
202EXPORT_SYMBOL(ieee80211_generic_frame_duration);
203
204__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif, size_t frame_len,
206 const struct ieee80211_tx_info *frame_txctl)
207{
208 struct ieee80211_local *local = hw_to_local(hw);
209 struct ieee80211_rate *rate;
210 struct ieee80211_sub_if_data *sdata;
211 bool short_preamble;
212 int erp, shift = 0, bitrate;
213 u16 dur;
214 struct ieee80211_supported_band *sband;
215
216 sband = local->hw.wiphy->bands[frame_txctl->band];
217
218 short_preamble = false;
219
220 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
221
222 erp = 0;
223 if (vif) {
224 sdata = vif_to_sdata(vif);
225 short_preamble = sdata->vif.bss_conf.use_short_preamble;
226 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
227 erp = rate->flags & IEEE80211_RATE_ERP_G;
228 shift = ieee80211_vif_get_shift(vif);
229 }
230
231 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
232
233 /* CTS duration */
234 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 /* Data frame duration */
237 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
238 erp, short_preamble, shift);
239 /* ACK duration */
240 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
241 erp, short_preamble, shift);
242
243 return cpu_to_le16(dur);
244}
245EXPORT_SYMBOL(ieee80211_rts_duration);
246
247__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
248 struct ieee80211_vif *vif,
249 size_t frame_len,
250 const struct ieee80211_tx_info *frame_txctl)
251{
252 struct ieee80211_local *local = hw_to_local(hw);
253 struct ieee80211_rate *rate;
254 struct ieee80211_sub_if_data *sdata;
255 bool short_preamble;
256 int erp, shift = 0, bitrate;
257 u16 dur;
258 struct ieee80211_supported_band *sband;
259
260 sband = local->hw.wiphy->bands[frame_txctl->band];
261
262 short_preamble = false;
263
264 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
265 erp = 0;
266 if (vif) {
267 sdata = vif_to_sdata(vif);
268 short_preamble = sdata->vif.bss_conf.use_short_preamble;
269 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
270 erp = rate->flags & IEEE80211_RATE_ERP_G;
271 shift = ieee80211_vif_get_shift(vif);
272 }
273
274 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
275
276 /* Data frame duration */
277 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
278 erp, short_preamble, shift);
279 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
280 /* ACK duration */
281 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
282 erp, short_preamble, shift);
283 }
284
285 return cpu_to_le16(dur);
286}
287EXPORT_SYMBOL(ieee80211_ctstoself_duration);
288
289void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
290{
291 struct ieee80211_sub_if_data *sdata;
292 int n_acs = IEEE80211_NUM_ACS;
293
294 if (local->hw.queues < IEEE80211_NUM_ACS)
295 n_acs = 1;
296
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
298 int ac;
299
300 if (!sdata->dev)
301 continue;
302
303 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
304 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
305 continue;
306
307 for (ac = 0; ac < n_acs; ac++) {
308 int ac_queue = sdata->vif.hw_queue[ac];
309
310 if (ac_queue == queue ||
311 (sdata->vif.cab_queue == queue &&
312 local->queue_stop_reasons[ac_queue] == 0 &&
313 skb_queue_empty(&local->pending[ac_queue])))
314 netif_wake_subqueue(sdata->dev, ac);
315 }
316 }
317}
318
319static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
320 enum queue_stop_reason reason)
321{
322 struct ieee80211_local *local = hw_to_local(hw);
323
324 trace_wake_queue(local, queue, reason);
325
326 if (WARN_ON(queue >= hw->queues))
327 return;
328
329 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
330 return;
331
332 __clear_bit(reason, &local->queue_stop_reasons[queue]);
333
334 if (local->queue_stop_reasons[queue] != 0)
335 /* someone still has this queue stopped */
336 return;
337
338 if (skb_queue_empty(&local->pending[queue])) {
339 rcu_read_lock();
340 ieee80211_propagate_queue_wake(local, queue);
341 rcu_read_unlock();
342 } else
343 tasklet_schedule(&local->tx_pending_tasklet);
344}
345
346void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
348{
349 struct ieee80211_local *local = hw_to_local(hw);
350 unsigned long flags;
351
352 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
353 __ieee80211_wake_queue(hw, queue, reason);
354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
355}
356
357void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
358{
359 ieee80211_wake_queue_by_reason(hw, queue,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER);
361}
362EXPORT_SYMBOL(ieee80211_wake_queue);
363
364static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
365 enum queue_stop_reason reason)
366{
367 struct ieee80211_local *local = hw_to_local(hw);
368 struct ieee80211_sub_if_data *sdata;
369 int n_acs = IEEE80211_NUM_ACS;
370
371 trace_stop_queue(local, queue, reason);
372
373 if (WARN_ON(queue >= hw->queues))
374 return;
375
376 if (test_bit(reason, &local->queue_stop_reasons[queue]))
377 return;
378
379 __set_bit(reason, &local->queue_stop_reasons[queue]);
380
381 if (local->hw.queues < IEEE80211_NUM_ACS)
382 n_acs = 1;
383
384 rcu_read_lock();
385 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
386 int ac;
387
388 if (!sdata->dev)
389 continue;
390
391 for (ac = 0; ac < n_acs; ac++) {
392 if (sdata->vif.hw_queue[ac] == queue ||
393 sdata->vif.cab_queue == queue)
394 netif_stop_subqueue(sdata->dev, ac);
395 }
396 }
397 rcu_read_unlock();
398}
399
400void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
401 enum queue_stop_reason reason)
402{
403 struct ieee80211_local *local = hw_to_local(hw);
404 unsigned long flags;
405
406 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
407 __ieee80211_stop_queue(hw, queue, reason);
408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
409}
410
411void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
412{
413 ieee80211_stop_queue_by_reason(hw, queue,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER);
415}
416EXPORT_SYMBOL(ieee80211_stop_queue);
417
418void ieee80211_add_pending_skb(struct ieee80211_local *local,
419 struct sk_buff *skb)
420{
421 struct ieee80211_hw *hw = &local->hw;
422 unsigned long flags;
423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
424 int queue = info->hw_queue;
425
426 if (WARN_ON(!info->control.vif)) {
427 ieee80211_free_txskb(&local->hw, skb);
428 return;
429 }
430
431 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
432 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
433 __skb_queue_tail(&local->pending[queue], skb);
434 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
436}
437
438void ieee80211_add_pending_skbs(struct ieee80211_local *local,
439 struct sk_buff_head *skbs)
440{
441 struct ieee80211_hw *hw = &local->hw;
442 struct sk_buff *skb;
443 unsigned long flags;
444 int queue, i;
445
446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
447 while ((skb = skb_dequeue(skbs))) {
448 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
449
450 if (WARN_ON(!info->control.vif)) {
451 ieee80211_free_txskb(&local->hw, skb);
452 continue;
453 }
454
455 queue = info->hw_queue;
456
457 __ieee80211_stop_queue(hw, queue,
458 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
459
460 __skb_queue_tail(&local->pending[queue], skb);
461 }
462
463 for (i = 0; i < hw->queues; i++)
464 __ieee80211_wake_queue(hw, i,
465 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
466 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
467}
468
469void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
470 unsigned long queues,
471 enum queue_stop_reason reason)
472{
473 struct ieee80211_local *local = hw_to_local(hw);
474 unsigned long flags;
475 int i;
476
477 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
478
479 for_each_set_bit(i, &queues, hw->queues)
480 __ieee80211_stop_queue(hw, i, reason);
481
482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
483}
484
485void ieee80211_stop_queues(struct ieee80211_hw *hw)
486{
487 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
488 IEEE80211_QUEUE_STOP_REASON_DRIVER);
489}
490EXPORT_SYMBOL(ieee80211_stop_queues);
491
492int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
493{
494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
496 int ret;
497
498 if (WARN_ON(queue >= hw->queues))
499 return true;
500
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
503 &local->queue_stop_reasons[queue]);
504 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
505 return ret;
506}
507EXPORT_SYMBOL(ieee80211_queue_stopped);
508
509void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
510 unsigned long queues,
511 enum queue_stop_reason reason)
512{
513 struct ieee80211_local *local = hw_to_local(hw);
514 unsigned long flags;
515 int i;
516
517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
518
519 for_each_set_bit(i, &queues, hw->queues)
520 __ieee80211_wake_queue(hw, i, reason);
521
522 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
523}
524
525void ieee80211_wake_queues(struct ieee80211_hw *hw)
526{
527 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
528 IEEE80211_QUEUE_STOP_REASON_DRIVER);
529}
530EXPORT_SYMBOL(ieee80211_wake_queues);
531
532void ieee80211_flush_queues(struct ieee80211_local *local,
533 struct ieee80211_sub_if_data *sdata)
534{
535 u32 queues;
536
537 if (!local->ops->flush)
538 return;
539
540 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
541 int ac;
542
543 queues = 0;
544
545 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
546 queues |= BIT(sdata->vif.hw_queue[ac]);
547 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
548 queues |= BIT(sdata->vif.cab_queue);
549 } else {
550 /* all queues */
551 queues = BIT(local->hw.queues) - 1;
552 }
553
554 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH);
556
557 drv_flush(local, queues, false);
558
559 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH);
561}
562
563static void __iterate_active_interfaces(struct ieee80211_local *local,
564 u32 iter_flags,
565 void (*iterator)(void *data, u8 *mac,
566 struct ieee80211_vif *vif),
567 void *data)
568{
569 struct ieee80211_sub_if_data *sdata;
570
571 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
572 switch (sdata->vif.type) {
573 case NL80211_IFTYPE_MONITOR:
574 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
575 continue;
576 break;
577 case NL80211_IFTYPE_AP_VLAN:
578 continue;
579 default:
580 break;
581 }
582 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
583 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
584 continue;
585 if (ieee80211_sdata_running(sdata))
586 iterator(data, sdata->vif.addr,
587 &sdata->vif);
588 }
589
590 sdata = rcu_dereference_check(local->monitor_sdata,
591 lockdep_is_held(&local->iflist_mtx) ||
592 lockdep_rtnl_is_held());
593 if (sdata &&
594 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
595 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
596 iterator(data, sdata->vif.addr, &sdata->vif);
597}
598
599void ieee80211_iterate_active_interfaces(
600 struct ieee80211_hw *hw, u32 iter_flags,
601 void (*iterator)(void *data, u8 *mac,
602 struct ieee80211_vif *vif),
603 void *data)
604{
605 struct ieee80211_local *local = hw_to_local(hw);
606
607 mutex_lock(&local->iflist_mtx);
608 __iterate_active_interfaces(local, iter_flags, iterator, data);
609 mutex_unlock(&local->iflist_mtx);
610}
611EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
612
613void ieee80211_iterate_active_interfaces_atomic(
614 struct ieee80211_hw *hw, u32 iter_flags,
615 void (*iterator)(void *data, u8 *mac,
616 struct ieee80211_vif *vif),
617 void *data)
618{
619 struct ieee80211_local *local = hw_to_local(hw);
620
621 rcu_read_lock();
622 __iterate_active_interfaces(local, iter_flags, iterator, data);
623 rcu_read_unlock();
624}
625EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
626
627void ieee80211_iterate_active_interfaces_rtnl(
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 ASSERT_RTNL();
636
637 __iterate_active_interfaces(local, iter_flags, iterator, data);
638}
639EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
640
641struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
642{
643 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
644
645 if (!ieee80211_sdata_running(sdata) ||
646 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
647 return NULL;
648 return &sdata->vif;
649}
650EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
651
652/*
653 * Nothing should have been stuffed into the workqueue during
654 * the suspend->resume cycle. If this WARN is seen then there
655 * is a bug with either the driver suspend or something in
656 * mac80211 stuffing into the workqueue which we haven't yet
657 * cleared during mac80211's suspend cycle.
658 */
659static bool ieee80211_can_queue_work(struct ieee80211_local *local)
660{
661 if (WARN(local->suspended && !local->resuming,
662 "queueing ieee80211 work while going to suspend\n"))
663 return false;
664
665 return true;
666}
667
668void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 if (!ieee80211_can_queue_work(local))
673 return;
674
675 queue_work(local->workqueue, work);
676}
677EXPORT_SYMBOL(ieee80211_queue_work);
678
679void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
680 struct delayed_work *dwork,
681 unsigned long delay)
682{
683 struct ieee80211_local *local = hw_to_local(hw);
684
685 if (!ieee80211_can_queue_work(local))
686 return;
687
688 queue_delayed_work(local->workqueue, dwork, delay);
689}
690EXPORT_SYMBOL(ieee80211_queue_delayed_work);
691
692u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
693 struct ieee802_11_elems *elems,
694 u64 filter, u32 crc)
695{
696 size_t left = len;
697 const u8 *pos = start;
698 bool calc_crc = filter != 0;
699 DECLARE_BITMAP(seen_elems, 256);
700 const u8 *ie;
701
702 bitmap_zero(seen_elems, 256);
703 memset(elems, 0, sizeof(*elems));
704 elems->ie_start = start;
705 elems->total_len = len;
706
707 while (left >= 2) {
708 u8 id, elen;
709 bool elem_parse_failed;
710
711 id = *pos++;
712 elen = *pos++;
713 left -= 2;
714
715 if (elen > left) {
716 elems->parse_error = true;
717 break;
718 }
719
720 switch (id) {
721 case WLAN_EID_SSID:
722 case WLAN_EID_SUPP_RATES:
723 case WLAN_EID_FH_PARAMS:
724 case WLAN_EID_DS_PARAMS:
725 case WLAN_EID_CF_PARAMS:
726 case WLAN_EID_TIM:
727 case WLAN_EID_IBSS_PARAMS:
728 case WLAN_EID_CHALLENGE:
729 case WLAN_EID_RSN:
730 case WLAN_EID_ERP_INFO:
731 case WLAN_EID_EXT_SUPP_RATES:
732 case WLAN_EID_HT_CAPABILITY:
733 case WLAN_EID_HT_OPERATION:
734 case WLAN_EID_VHT_CAPABILITY:
735 case WLAN_EID_VHT_OPERATION:
736 case WLAN_EID_MESH_ID:
737 case WLAN_EID_MESH_CONFIG:
738 case WLAN_EID_PEER_MGMT:
739 case WLAN_EID_PREQ:
740 case WLAN_EID_PREP:
741 case WLAN_EID_PERR:
742 case WLAN_EID_RANN:
743 case WLAN_EID_CHANNEL_SWITCH:
744 case WLAN_EID_EXT_CHANSWITCH_ANN:
745 case WLAN_EID_COUNTRY:
746 case WLAN_EID_PWR_CONSTRAINT:
747 case WLAN_EID_TIMEOUT_INTERVAL:
748 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
749 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
750 case WLAN_EID_CHAN_SWITCH_PARAM:
751 /*
752 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
753 * that if the content gets bigger it might be needed more than once
754 */
755 if (test_bit(id, seen_elems)) {
756 elems->parse_error = true;
757 left -= elen;
758 pos += elen;
759 continue;
760 }
761 break;
762 }
763
764 if (calc_crc && id < 64 && (filter & (1ULL << id)))
765 crc = crc32_be(crc, pos - 2, elen + 2);
766
767 elem_parse_failed = false;
768
769 switch (id) {
770 case WLAN_EID_SSID:
771 elems->ssid = pos;
772 elems->ssid_len = elen;
773 break;
774 case WLAN_EID_SUPP_RATES:
775 elems->supp_rates = pos;
776 elems->supp_rates_len = elen;
777 break;
778 case WLAN_EID_DS_PARAMS:
779 if (elen >= 1)
780 elems->ds_params = pos;
781 else
782 elem_parse_failed = true;
783 break;
784 case WLAN_EID_TIM:
785 if (elen >= sizeof(struct ieee80211_tim_ie)) {
786 elems->tim = (void *)pos;
787 elems->tim_len = elen;
788 } else
789 elem_parse_failed = true;
790 break;
791 case WLAN_EID_CHALLENGE:
792 elems->challenge = pos;
793 elems->challenge_len = elen;
794 break;
795 case WLAN_EID_VENDOR_SPECIFIC:
796 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
797 pos[2] == 0xf2) {
798 /* Microsoft OUI (00:50:F2) */
799
800 if (calc_crc)
801 crc = crc32_be(crc, pos - 2, elen + 2);
802
803 if (elen >= 5 && pos[3] == 2) {
804 /* OUI Type 2 - WMM IE */
805 if (pos[4] == 0) {
806 elems->wmm_info = pos;
807 elems->wmm_info_len = elen;
808 } else if (pos[4] == 1) {
809 elems->wmm_param = pos;
810 elems->wmm_param_len = elen;
811 }
812 }
813 }
814 break;
815 case WLAN_EID_RSN:
816 elems->rsn = pos;
817 elems->rsn_len = elen;
818 break;
819 case WLAN_EID_ERP_INFO:
820 if (elen >= 1)
821 elems->erp_info = pos;
822 else
823 elem_parse_failed = true;
824 break;
825 case WLAN_EID_EXT_SUPP_RATES:
826 elems->ext_supp_rates = pos;
827 elems->ext_supp_rates_len = elen;
828 break;
829 case WLAN_EID_HT_CAPABILITY:
830 if (elen >= sizeof(struct ieee80211_ht_cap))
831 elems->ht_cap_elem = (void *)pos;
832 else
833 elem_parse_failed = true;
834 break;
835 case WLAN_EID_HT_OPERATION:
836 if (elen >= sizeof(struct ieee80211_ht_operation))
837 elems->ht_operation = (void *)pos;
838 else
839 elem_parse_failed = true;
840 break;
841 case WLAN_EID_VHT_CAPABILITY:
842 if (elen >= sizeof(struct ieee80211_vht_cap))
843 elems->vht_cap_elem = (void *)pos;
844 else
845 elem_parse_failed = true;
846 break;
847 case WLAN_EID_VHT_OPERATION:
848 if (elen >= sizeof(struct ieee80211_vht_operation))
849 elems->vht_operation = (void *)pos;
850 else
851 elem_parse_failed = true;
852 break;
853 case WLAN_EID_OPMODE_NOTIF:
854 if (elen > 0)
855 elems->opmode_notif = pos;
856 else
857 elem_parse_failed = true;
858 break;
859 case WLAN_EID_MESH_ID:
860 elems->mesh_id = pos;
861 elems->mesh_id_len = elen;
862 break;
863 case WLAN_EID_MESH_CONFIG:
864 if (elen >= sizeof(struct ieee80211_meshconf_ie))
865 elems->mesh_config = (void *)pos;
866 else
867 elem_parse_failed = true;
868 break;
869 case WLAN_EID_PEER_MGMT:
870 elems->peering = pos;
871 elems->peering_len = elen;
872 break;
873 case WLAN_EID_MESH_AWAKE_WINDOW:
874 if (elen >= 2)
875 elems->awake_window = (void *)pos;
876 break;
877 case WLAN_EID_PREQ:
878 elems->preq = pos;
879 elems->preq_len = elen;
880 break;
881 case WLAN_EID_PREP:
882 elems->prep = pos;
883 elems->prep_len = elen;
884 break;
885 case WLAN_EID_PERR:
886 elems->perr = pos;
887 elems->perr_len = elen;
888 break;
889 case WLAN_EID_RANN:
890 if (elen >= sizeof(struct ieee80211_rann_ie))
891 elems->rann = (void *)pos;
892 else
893 elem_parse_failed = true;
894 break;
895 case WLAN_EID_CHANNEL_SWITCH:
896 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
897 elem_parse_failed = true;
898 break;
899 }
900 elems->ch_switch_ie = (void *)pos;
901 break;
902 case WLAN_EID_EXT_CHANSWITCH_ANN:
903 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
904 elem_parse_failed = true;
905 break;
906 }
907 elems->ext_chansw_ie = (void *)pos;
908 break;
909 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
910 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
911 elem_parse_failed = true;
912 break;
913 }
914 elems->sec_chan_offs = (void *)pos;
915 break;
916 case WLAN_EID_CHAN_SWITCH_PARAM:
917 if (elen !=
918 sizeof(*elems->mesh_chansw_params_ie)) {
919 elem_parse_failed = true;
920 break;
921 }
922 elems->mesh_chansw_params_ie = (void *)pos;
923 break;
924 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
925 if (!action ||
926 elen != sizeof(*elems->wide_bw_chansw_ie)) {
927 elem_parse_failed = true;
928 break;
929 }
930 elems->wide_bw_chansw_ie = (void *)pos;
931 break;
932 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
933 if (action) {
934 elem_parse_failed = true;
935 break;
936 }
937 /*
938 * This is a bit tricky, but as we only care about
939 * the wide bandwidth channel switch element, so
940 * just parse it out manually.
941 */
942 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
943 pos, elen);
944 if (ie) {
945 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
946 elems->wide_bw_chansw_ie =
947 (void *)(ie + 2);
948 else
949 elem_parse_failed = true;
950 }
951 break;
952 case WLAN_EID_COUNTRY:
953 elems->country_elem = pos;
954 elems->country_elem_len = elen;
955 break;
956 case WLAN_EID_PWR_CONSTRAINT:
957 if (elen != 1) {
958 elem_parse_failed = true;
959 break;
960 }
961 elems->pwr_constr_elem = pos;
962 break;
963 case WLAN_EID_TIMEOUT_INTERVAL:
964 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
965 elems->timeout_int = (void *)pos;
966 else
967 elem_parse_failed = true;
968 break;
969 default:
970 break;
971 }
972
973 if (elem_parse_failed)
974 elems->parse_error = true;
975 else
976 __set_bit(id, seen_elems);
977
978 left -= elen;
979 pos += elen;
980 }
981
982 if (left != 0)
983 elems->parse_error = true;
984
985 return crc;
986}
987
988void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
989 bool bss_notify)
990{
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_tx_queue_params qparam;
993 struct ieee80211_chanctx_conf *chanctx_conf;
994 int ac;
995 bool use_11b, enable_qos;
996 int aCWmin, aCWmax;
997
998 if (!local->ops->conf_tx)
999 return;
1000
1001 if (local->hw.queues < IEEE80211_NUM_ACS)
1002 return;
1003
1004 memset(&qparam, 0, sizeof(qparam));
1005
1006 rcu_read_lock();
1007 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1008 use_11b = (chanctx_conf &&
1009 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1010 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1011 rcu_read_unlock();
1012
1013 /*
1014 * By default disable QoS in STA mode for old access points, which do
1015 * not support 802.11e. New APs will provide proper queue parameters,
1016 * that we will configure later.
1017 */
1018 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1019
1020 /* Set defaults according to 802.11-2007 Table 7-37 */
1021 aCWmax = 1023;
1022 if (use_11b)
1023 aCWmin = 31;
1024 else
1025 aCWmin = 15;
1026
1027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
1030 qparam.txop = 0;
1031 qparam.aifs = 2;
1032
1033 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1034 /* Update if QoS is enabled. */
1035 if (enable_qos) {
1036 switch (ac) {
1037 case IEEE80211_AC_BK:
1038 qparam.cw_max = aCWmax;
1039 qparam.cw_min = aCWmin;
1040 qparam.txop = 0;
1041 qparam.aifs = 7;
1042 break;
1043 /* never happens but let's not leave undefined */
1044 default:
1045 case IEEE80211_AC_BE:
1046 qparam.cw_max = aCWmax;
1047 qparam.cw_min = aCWmin;
1048 qparam.txop = 0;
1049 qparam.aifs = 3;
1050 break;
1051 case IEEE80211_AC_VI:
1052 qparam.cw_max = aCWmin;
1053 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1054 if (use_11b)
1055 qparam.txop = 6016/32;
1056 else
1057 qparam.txop = 3008/32;
1058 qparam.aifs = 2;
1059 break;
1060 case IEEE80211_AC_VO:
1061 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1062 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1063 if (use_11b)
1064 qparam.txop = 3264/32;
1065 else
1066 qparam.txop = 1504/32;
1067 qparam.aifs = 2;
1068 break;
1069 }
1070 }
1071
1072 qparam.uapsd = false;
1073
1074 sdata->tx_conf[ac] = qparam;
1075 drv_conf_tx(local, sdata, ac, &qparam);
1076 }
1077
1078 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1079 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1080 sdata->vif.bss_conf.qos = enable_qos;
1081 if (bss_notify)
1082 ieee80211_bss_info_change_notify(sdata,
1083 BSS_CHANGED_QOS);
1084 }
1085}
1086
1087void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1088 u16 transaction, u16 auth_alg, u16 status,
1089 const u8 *extra, size_t extra_len, const u8 *da,
1090 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1091 u32 tx_flags)
1092{
1093 struct ieee80211_local *local = sdata->local;
1094 struct sk_buff *skb;
1095 struct ieee80211_mgmt *mgmt;
1096 int err;
1097
1098 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1099 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
1100 if (!skb)
1101 return;
1102
1103 skb_reserve(skb, local->hw.extra_tx_headroom);
1104
1105 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1106 memset(mgmt, 0, 24 + 6);
1107 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1108 IEEE80211_STYPE_AUTH);
1109 memcpy(mgmt->da, da, ETH_ALEN);
1110 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1111 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1112 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1113 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1114 mgmt->u.auth.status_code = cpu_to_le16(status);
1115 if (extra)
1116 memcpy(skb_put(skb, extra_len), extra, extra_len);
1117
1118 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1119 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1120 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1121 WARN_ON(err);
1122 }
1123
1124 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1125 tx_flags;
1126 ieee80211_tx_skb(sdata, skb);
1127}
1128
1129void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1130 const u8 *bssid, u16 stype, u16 reason,
1131 bool send_frame, u8 *frame_buf)
1132{
1133 struct ieee80211_local *local = sdata->local;
1134 struct sk_buff *skb;
1135 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1136
1137 /* build frame */
1138 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1139 mgmt->duration = 0; /* initialize only */
1140 mgmt->seq_ctrl = 0; /* initialize only */
1141 memcpy(mgmt->da, bssid, ETH_ALEN);
1142 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1143 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1144 /* u.deauth.reason_code == u.disassoc.reason_code */
1145 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1146
1147 if (send_frame) {
1148 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1149 IEEE80211_DEAUTH_FRAME_LEN);
1150 if (!skb)
1151 return;
1152
1153 skb_reserve(skb, local->hw.extra_tx_headroom);
1154
1155 /* copy in frame */
1156 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1157 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1158
1159 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1160 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1161 IEEE80211_SKB_CB(skb)->flags |=
1162 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1163
1164 ieee80211_tx_skb(sdata, skb);
1165 }
1166}
1167
1168int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1169 size_t buffer_len, const u8 *ie, size_t ie_len,
1170 enum ieee80211_band band, u32 rate_mask,
1171 struct cfg80211_chan_def *chandef)
1172{
1173 struct ieee80211_supported_band *sband;
1174 u8 *pos = buffer, *end = buffer + buffer_len;
1175 size_t offset = 0, noffset;
1176 int supp_rates_len, i;
1177 u8 rates[32];
1178 int num_rates;
1179 int ext_rates_len;
1180 int shift;
1181 u32 rate_flags;
1182
1183 sband = local->hw.wiphy->bands[band];
1184 if (WARN_ON_ONCE(!sband))
1185 return 0;
1186
1187 rate_flags = ieee80211_chandef_rate_flags(chandef);
1188 shift = ieee80211_chandef_get_shift(chandef);
1189
1190 num_rates = 0;
1191 for (i = 0; i < sband->n_bitrates; i++) {
1192 if ((BIT(i) & rate_mask) == 0)
1193 continue; /* skip rate */
1194 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1195 continue;
1196
1197 rates[num_rates++] =
1198 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1199 (1 << shift) * 5);
1200 }
1201
1202 supp_rates_len = min_t(int, num_rates, 8);
1203
1204 if (end - pos < 2 + supp_rates_len)
1205 goto out_err;
1206 *pos++ = WLAN_EID_SUPP_RATES;
1207 *pos++ = supp_rates_len;
1208 memcpy(pos, rates, supp_rates_len);
1209 pos += supp_rates_len;
1210
1211 /* insert "request information" if in custom IEs */
1212 if (ie && ie_len) {
1213 static const u8 before_extrates[] = {
1214 WLAN_EID_SSID,
1215 WLAN_EID_SUPP_RATES,
1216 WLAN_EID_REQUEST,
1217 };
1218 noffset = ieee80211_ie_split(ie, ie_len,
1219 before_extrates,
1220 ARRAY_SIZE(before_extrates),
1221 offset);
1222 if (end - pos < noffset - offset)
1223 goto out_err;
1224 memcpy(pos, ie + offset, noffset - offset);
1225 pos += noffset - offset;
1226 offset = noffset;
1227 }
1228
1229 ext_rates_len = num_rates - supp_rates_len;
1230 if (ext_rates_len > 0) {
1231 if (end - pos < 2 + ext_rates_len)
1232 goto out_err;
1233 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1234 *pos++ = ext_rates_len;
1235 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1236 pos += ext_rates_len;
1237 }
1238
1239 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1240 if (end - pos < 3)
1241 goto out_err;
1242 *pos++ = WLAN_EID_DS_PARAMS;
1243 *pos++ = 1;
1244 *pos++ = ieee80211_frequency_to_channel(
1245 chandef->chan->center_freq);
1246 }
1247
1248 /* insert custom IEs that go before HT */
1249 if (ie && ie_len) {
1250 static const u8 before_ht[] = {
1251 WLAN_EID_SSID,
1252 WLAN_EID_SUPP_RATES,
1253 WLAN_EID_REQUEST,
1254 WLAN_EID_EXT_SUPP_RATES,
1255 WLAN_EID_DS_PARAMS,
1256 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1257 };
1258 noffset = ieee80211_ie_split(ie, ie_len,
1259 before_ht, ARRAY_SIZE(before_ht),
1260 offset);
1261 if (end - pos < noffset - offset)
1262 goto out_err;
1263 memcpy(pos, ie + offset, noffset - offset);
1264 pos += noffset - offset;
1265 offset = noffset;
1266 }
1267
1268 if (sband->ht_cap.ht_supported) {
1269 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1270 goto out_err;
1271 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1272 sband->ht_cap.cap);
1273 }
1274
1275 /*
1276 * If adding more here, adjust code in main.c
1277 * that calculates local->scan_ies_len.
1278 */
1279
1280 /* insert custom IEs that go before VHT */
1281 if (ie && ie_len) {
1282 static const u8 before_vht[] = {
1283 WLAN_EID_SSID,
1284 WLAN_EID_SUPP_RATES,
1285 WLAN_EID_REQUEST,
1286 WLAN_EID_EXT_SUPP_RATES,
1287 WLAN_EID_DS_PARAMS,
1288 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1289 WLAN_EID_HT_CAPABILITY,
1290 WLAN_EID_BSS_COEX_2040,
1291 WLAN_EID_EXT_CAPABILITY,
1292 WLAN_EID_SSID_LIST,
1293 WLAN_EID_CHANNEL_USAGE,
1294 WLAN_EID_INTERWORKING,
1295 /* mesh ID can't happen here */
1296 /* 60 GHz can't happen here right now */
1297 };
1298 noffset = ieee80211_ie_split(ie, ie_len,
1299 before_vht, ARRAY_SIZE(before_vht),
1300 offset);
1301 if (end - pos < noffset - offset)
1302 goto out_err;
1303 memcpy(pos, ie + offset, noffset - offset);
1304 pos += noffset - offset;
1305 offset = noffset;
1306 }
1307
1308 if (sband->vht_cap.vht_supported) {
1309 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1310 goto out_err;
1311 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1312 sband->vht_cap.cap);
1313 }
1314
1315 /* add any remaining custom IEs */
1316 if (ie && ie_len) {
1317 noffset = ie_len;
1318 if (end - pos < noffset - offset)
1319 goto out_err;
1320 memcpy(pos, ie + offset, noffset - offset);
1321 pos += noffset - offset;
1322 }
1323
1324 return pos - buffer;
1325 out_err:
1326 WARN_ONCE(1, "not enough space for preq IEs\n");
1327 return pos - buffer;
1328}
1329
1330struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1331 u8 *dst, u32 ratemask,
1332 struct ieee80211_channel *chan,
1333 const u8 *ssid, size_t ssid_len,
1334 const u8 *ie, size_t ie_len,
1335 bool directed)
1336{
1337 struct ieee80211_local *local = sdata->local;
1338 struct cfg80211_chan_def chandef;
1339 struct sk_buff *skb;
1340 struct ieee80211_mgmt *mgmt;
1341 int ies_len;
1342
1343 /*
1344 * Do not send DS Channel parameter for directed probe requests
1345 * in order to maximize the chance that we get a response. Some
1346 * badly-behaved APs don't respond when this parameter is included.
1347 */
1348 chandef.width = sdata->vif.bss_conf.chandef.width;
1349 if (directed)
1350 chandef.chan = NULL;
1351 else
1352 chandef.chan = chan;
1353
1354 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1355 ssid, ssid_len, 100 + ie_len);
1356 if (!skb)
1357 return NULL;
1358
1359 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1360 skb_tailroom(skb),
1361 ie, ie_len, chan->band,
1362 ratemask, &chandef);
1363 skb_put(skb, ies_len);
1364
1365 if (dst) {
1366 mgmt = (struct ieee80211_mgmt *) skb->data;
1367 memcpy(mgmt->da, dst, ETH_ALEN);
1368 memcpy(mgmt->bssid, dst, ETH_ALEN);
1369 }
1370
1371 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1372
1373 return skb;
1374}
1375
1376void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1377 const u8 *ssid, size_t ssid_len,
1378 const u8 *ie, size_t ie_len,
1379 u32 ratemask, bool directed, u32 tx_flags,
1380 struct ieee80211_channel *channel, bool scan)
1381{
1382 struct sk_buff *skb;
1383
1384 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1385 ssid, ssid_len,
1386 ie, ie_len, directed);
1387 if (skb) {
1388 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1389 if (scan)
1390 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1391 else
1392 ieee80211_tx_skb(sdata, skb);
1393 }
1394}
1395
1396u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1397 struct ieee802_11_elems *elems,
1398 enum ieee80211_band band, u32 *basic_rates)
1399{
1400 struct ieee80211_supported_band *sband;
1401 size_t num_rates;
1402 u32 supp_rates, rate_flags;
1403 int i, j, shift;
1404 sband = sdata->local->hw.wiphy->bands[band];
1405
1406 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1407 shift = ieee80211_vif_get_shift(&sdata->vif);
1408
1409 if (WARN_ON(!sband))
1410 return 1;
1411
1412 num_rates = sband->n_bitrates;
1413 supp_rates = 0;
1414 for (i = 0; i < elems->supp_rates_len +
1415 elems->ext_supp_rates_len; i++) {
1416 u8 rate = 0;
1417 int own_rate;
1418 bool is_basic;
1419 if (i < elems->supp_rates_len)
1420 rate = elems->supp_rates[i];
1421 else if (elems->ext_supp_rates)
1422 rate = elems->ext_supp_rates
1423 [i - elems->supp_rates_len];
1424 own_rate = 5 * (rate & 0x7f);
1425 is_basic = !!(rate & 0x80);
1426
1427 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1428 continue;
1429
1430 for (j = 0; j < num_rates; j++) {
1431 int brate;
1432 if ((rate_flags & sband->bitrates[j].flags)
1433 != rate_flags)
1434 continue;
1435
1436 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1437 1 << shift);
1438
1439 if (brate == own_rate) {
1440 supp_rates |= BIT(j);
1441 if (basic_rates && is_basic)
1442 *basic_rates |= BIT(j);
1443 }
1444 }
1445 }
1446 return supp_rates;
1447}
1448
1449void ieee80211_stop_device(struct ieee80211_local *local)
1450{
1451 ieee80211_led_radio(local, false);
1452 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1453
1454 cancel_work_sync(&local->reconfig_filter);
1455
1456 flush_workqueue(local->workqueue);
1457 drv_stop(local);
1458}
1459
1460static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1461 struct ieee80211_sub_if_data *sdata)
1462{
1463 struct ieee80211_chanctx_conf *conf;
1464 struct ieee80211_chanctx *ctx;
1465
1466 if (!local->use_chanctx)
1467 return;
1468
1469 mutex_lock(&local->chanctx_mtx);
1470 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1471 lockdep_is_held(&local->chanctx_mtx));
1472 if (conf) {
1473 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1474 drv_assign_vif_chanctx(local, sdata, ctx);
1475 }
1476 mutex_unlock(&local->chanctx_mtx);
1477}
1478
1479int ieee80211_reconfig(struct ieee80211_local *local)
1480{
1481 struct ieee80211_hw *hw = &local->hw;
1482 struct ieee80211_sub_if_data *sdata;
1483 struct ieee80211_chanctx *ctx;
1484 struct sta_info *sta;
1485 int res, i;
1486 bool reconfig_due_to_wowlan = false;
1487 struct ieee80211_sub_if_data *sched_scan_sdata;
1488 bool sched_scan_stopped = false;
1489
1490#ifdef CONFIG_PM
1491 if (local->suspended)
1492 local->resuming = true;
1493
1494 if (local->wowlan) {
1495 res = drv_resume(local);
1496 local->wowlan = false;
1497 if (res < 0) {
1498 local->resuming = false;
1499 return res;
1500 }
1501 if (res == 0)
1502 goto wake_up;
1503 WARN_ON(res > 1);
1504 /*
1505 * res is 1, which means the driver requested
1506 * to go through a regular reset on wakeup.
1507 */
1508 reconfig_due_to_wowlan = true;
1509 }
1510#endif
1511 /* everything else happens only if HW was up & running */
1512 if (!local->open_count)
1513 goto wake_up;
1514
1515 /*
1516 * Upon resume hardware can sometimes be goofy due to
1517 * various platform / driver / bus issues, so restarting
1518 * the device may at times not work immediately. Propagate
1519 * the error.
1520 */
1521 res = drv_start(local);
1522 if (res) {
1523 WARN(local->suspended, "Hardware became unavailable "
1524 "upon resume. This could be a software issue "
1525 "prior to suspend or a hardware issue.\n");
1526 return res;
1527 }
1528
1529 /* setup fragmentation threshold */
1530 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1531
1532 /* setup RTS threshold */
1533 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1534
1535 /* reset coverage class */
1536 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1537
1538 ieee80211_led_radio(local, true);
1539 ieee80211_mod_tpt_led_trig(local,
1540 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1541
1542 /* add interfaces */
1543 sdata = rtnl_dereference(local->monitor_sdata);
1544 if (sdata) {
1545 /* in HW restart it exists already */
1546 WARN_ON(local->resuming);
1547 res = drv_add_interface(local, sdata);
1548 if (WARN_ON(res)) {
1549 rcu_assign_pointer(local->monitor_sdata, NULL);
1550 synchronize_net();
1551 kfree(sdata);
1552 }
1553 }
1554
1555 list_for_each_entry(sdata, &local->interfaces, list) {
1556 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1557 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1558 ieee80211_sdata_running(sdata))
1559 res = drv_add_interface(local, sdata);
1560 }
1561
1562 /* add channel contexts */
1563 if (local->use_chanctx) {
1564 mutex_lock(&local->chanctx_mtx);
1565 list_for_each_entry(ctx, &local->chanctx_list, list)
1566 WARN_ON(drv_add_chanctx(local, ctx));
1567 mutex_unlock(&local->chanctx_mtx);
1568 }
1569
1570 list_for_each_entry(sdata, &local->interfaces, list) {
1571 if (!ieee80211_sdata_running(sdata))
1572 continue;
1573 ieee80211_assign_chanctx(local, sdata);
1574 }
1575
1576 sdata = rtnl_dereference(local->monitor_sdata);
1577 if (sdata && ieee80211_sdata_running(sdata))
1578 ieee80211_assign_chanctx(local, sdata);
1579
1580 /* add STAs back */
1581 mutex_lock(&local->sta_mtx);
1582 list_for_each_entry(sta, &local->sta_list, list) {
1583 enum ieee80211_sta_state state;
1584
1585 if (!sta->uploaded)
1586 continue;
1587
1588 /* AP-mode stations will be added later */
1589 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1590 continue;
1591
1592 for (state = IEEE80211_STA_NOTEXIST;
1593 state < sta->sta_state; state++)
1594 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1595 state + 1));
1596 }
1597 mutex_unlock(&local->sta_mtx);
1598
1599 /* reconfigure tx conf */
1600 if (hw->queues >= IEEE80211_NUM_ACS) {
1601 list_for_each_entry(sdata, &local->interfaces, list) {
1602 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1603 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1604 !ieee80211_sdata_running(sdata))
1605 continue;
1606
1607 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1608 drv_conf_tx(local, sdata, i,
1609 &sdata->tx_conf[i]);
1610 }
1611 }
1612
1613 /* reconfigure hardware */
1614 ieee80211_hw_config(local, ~0);
1615
1616 ieee80211_configure_filter(local);
1617
1618 /* Finally also reconfigure all the BSS information */
1619 list_for_each_entry(sdata, &local->interfaces, list) {
1620 u32 changed;
1621
1622 if (!ieee80211_sdata_running(sdata))
1623 continue;
1624
1625 /* common change flags for all interface types */
1626 changed = BSS_CHANGED_ERP_CTS_PROT |
1627 BSS_CHANGED_ERP_PREAMBLE |
1628 BSS_CHANGED_ERP_SLOT |
1629 BSS_CHANGED_HT |
1630 BSS_CHANGED_BASIC_RATES |
1631 BSS_CHANGED_BEACON_INT |
1632 BSS_CHANGED_BSSID |
1633 BSS_CHANGED_CQM |
1634 BSS_CHANGED_QOS |
1635 BSS_CHANGED_IDLE |
1636 BSS_CHANGED_TXPOWER;
1637
1638 switch (sdata->vif.type) {
1639 case NL80211_IFTYPE_STATION:
1640 changed |= BSS_CHANGED_ASSOC |
1641 BSS_CHANGED_ARP_FILTER |
1642 BSS_CHANGED_PS;
1643
1644 /* Re-send beacon info report to the driver */
1645 if (sdata->u.mgd.have_beacon)
1646 changed |= BSS_CHANGED_BEACON_INFO;
1647
1648 sdata_lock(sdata);
1649 ieee80211_bss_info_change_notify(sdata, changed);
1650 sdata_unlock(sdata);
1651 break;
1652 case NL80211_IFTYPE_ADHOC:
1653 changed |= BSS_CHANGED_IBSS;
1654 /* fall through */
1655 case NL80211_IFTYPE_AP:
1656 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1657
1658 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1659 changed |= BSS_CHANGED_AP_PROBE_RESP;
1660
1661 if (rcu_access_pointer(sdata->u.ap.beacon))
1662 drv_start_ap(local, sdata);
1663 }
1664
1665 /* fall through */
1666 case NL80211_IFTYPE_MESH_POINT:
1667 if (sdata->vif.bss_conf.enable_beacon) {
1668 changed |= BSS_CHANGED_BEACON |
1669 BSS_CHANGED_BEACON_ENABLED;
1670 ieee80211_bss_info_change_notify(sdata, changed);
1671 }
1672 break;
1673 case NL80211_IFTYPE_WDS:
1674 break;
1675 case NL80211_IFTYPE_AP_VLAN:
1676 case NL80211_IFTYPE_MONITOR:
1677 /* ignore virtual */
1678 break;
1679 case NL80211_IFTYPE_P2P_DEVICE:
1680 changed = BSS_CHANGED_IDLE;
1681 break;
1682 case NL80211_IFTYPE_UNSPECIFIED:
1683 case NUM_NL80211_IFTYPES:
1684 case NL80211_IFTYPE_P2P_CLIENT:
1685 case NL80211_IFTYPE_P2P_GO:
1686 WARN_ON(1);
1687 break;
1688 }
1689 }
1690
1691 ieee80211_recalc_ps(local, -1);
1692
1693 /*
1694 * The sta might be in psm against the ap (e.g. because
1695 * this was the state before a hw restart), so we
1696 * explicitly send a null packet in order to make sure
1697 * it'll sync against the ap (and get out of psm).
1698 */
1699 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1700 list_for_each_entry(sdata, &local->interfaces, list) {
1701 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1702 continue;
1703 if (!sdata->u.mgd.associated)
1704 continue;
1705
1706 ieee80211_send_nullfunc(local, sdata, 0);
1707 }
1708 }
1709
1710 /* APs are now beaconing, add back stations */
1711 mutex_lock(&local->sta_mtx);
1712 list_for_each_entry(sta, &local->sta_list, list) {
1713 enum ieee80211_sta_state state;
1714
1715 if (!sta->uploaded)
1716 continue;
1717
1718 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1719 continue;
1720
1721 for (state = IEEE80211_STA_NOTEXIST;
1722 state < sta->sta_state; state++)
1723 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1724 state + 1));
1725 }
1726 mutex_unlock(&local->sta_mtx);
1727
1728 /* add back keys */
1729 list_for_each_entry(sdata, &local->interfaces, list)
1730 if (ieee80211_sdata_running(sdata))
1731 ieee80211_enable_keys(sdata);
1732
1733 wake_up:
1734 local->in_reconfig = false;
1735 barrier();
1736
1737 if (local->monitors == local->open_count && local->monitors > 0)
1738 ieee80211_add_virtual_monitor(local);
1739
1740 /*
1741 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1742 * sessions can be established after a resume.
1743 *
1744 * Also tear down aggregation sessions since reconfiguring
1745 * them in a hardware restart scenario is not easily done
1746 * right now, and the hardware will have lost information
1747 * about the sessions, but we and the AP still think they
1748 * are active. This is really a workaround though.
1749 */
1750 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1751 mutex_lock(&local->sta_mtx);
1752
1753 list_for_each_entry(sta, &local->sta_list, list) {
1754 ieee80211_sta_tear_down_BA_sessions(
1755 sta, AGG_STOP_LOCAL_REQUEST);
1756 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1757 }
1758
1759 mutex_unlock(&local->sta_mtx);
1760 }
1761
1762 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1763 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1764
1765 /*
1766 * Reconfigure sched scan if it was interrupted by FW restart or
1767 * suspend.
1768 */
1769 mutex_lock(&local->mtx);
1770 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1771 lockdep_is_held(&local->mtx));
1772 if (sched_scan_sdata && local->sched_scan_req)
1773 /*
1774 * Sched scan stopped, but we don't want to report it. Instead,
1775 * we're trying to reschedule.
1776 */
1777 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1778 local->sched_scan_req))
1779 sched_scan_stopped = true;
1780 mutex_unlock(&local->mtx);
1781
1782 if (sched_scan_stopped)
1783 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1784
1785 /*
1786 * If this is for hw restart things are still running.
1787 * We may want to change that later, however.
1788 */
1789 if (!local->suspended || reconfig_due_to_wowlan)
1790 drv_restart_complete(local);
1791
1792 if (!local->suspended)
1793 return 0;
1794
1795#ifdef CONFIG_PM
1796 /* first set suspended false, then resuming */
1797 local->suspended = false;
1798 mb();
1799 local->resuming = false;
1800
1801 list_for_each_entry(sdata, &local->interfaces, list) {
1802 if (!ieee80211_sdata_running(sdata))
1803 continue;
1804 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1805 ieee80211_sta_restart(sdata);
1806 }
1807
1808 mod_timer(&local->sta_cleanup, jiffies + 1);
1809#else
1810 WARN_ON(1);
1811#endif
1812
1813 return 0;
1814}
1815
1816void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1817{
1818 struct ieee80211_sub_if_data *sdata;
1819 struct ieee80211_local *local;
1820 struct ieee80211_key *key;
1821
1822 if (WARN_ON(!vif))
1823 return;
1824
1825 sdata = vif_to_sdata(vif);
1826 local = sdata->local;
1827
1828 if (WARN_ON(!local->resuming))
1829 return;
1830
1831 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1832 return;
1833
1834 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1835
1836 mutex_lock(&local->key_mtx);
1837 list_for_each_entry(key, &sdata->key_list, list)
1838 key->flags |= KEY_FLAG_TAINTED;
1839 mutex_unlock(&local->key_mtx);
1840}
1841EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1842
1843void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1844{
1845 struct ieee80211_local *local = sdata->local;
1846 struct ieee80211_chanctx_conf *chanctx_conf;
1847 struct ieee80211_chanctx *chanctx;
1848
1849 mutex_lock(&local->chanctx_mtx);
1850
1851 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1852 lockdep_is_held(&local->chanctx_mtx));
1853
1854 if (WARN_ON_ONCE(!chanctx_conf))
1855 goto unlock;
1856
1857 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1858 ieee80211_recalc_smps_chanctx(local, chanctx);
1859 unlock:
1860 mutex_unlock(&local->chanctx_mtx);
1861}
1862
1863void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1864{
1865 struct ieee80211_local *local = sdata->local;
1866 struct ieee80211_chanctx_conf *chanctx_conf;
1867 struct ieee80211_chanctx *chanctx;
1868
1869 mutex_lock(&local->chanctx_mtx);
1870
1871 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1872 lockdep_is_held(&local->chanctx_mtx));
1873
1874 if (WARN_ON_ONCE(!chanctx_conf))
1875 goto unlock;
1876
1877 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1878 ieee80211_recalc_chanctx_min_def(local, chanctx);
1879 unlock:
1880 mutex_unlock(&local->chanctx_mtx);
1881}
1882
1883static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1884{
1885 int i;
1886
1887 for (i = 0; i < n_ids; i++)
1888 if (ids[i] == id)
1889 return true;
1890 return false;
1891}
1892
1893/**
1894 * ieee80211_ie_split - split an IE buffer according to ordering
1895 *
1896 * @ies: the IE buffer
1897 * @ielen: the length of the IE buffer
1898 * @ids: an array with element IDs that are allowed before
1899 * the split
1900 * @n_ids: the size of the element ID array
1901 * @offset: offset where to start splitting in the buffer
1902 *
1903 * This function splits an IE buffer by updating the @offset
1904 * variable to point to the location where the buffer should be
1905 * split.
1906 *
1907 * It assumes that the given IE buffer is well-formed, this
1908 * has to be guaranteed by the caller!
1909 *
1910 * It also assumes that the IEs in the buffer are ordered
1911 * correctly, if not the result of using this function will not
1912 * be ordered correctly either, i.e. it does no reordering.
1913 *
1914 * The function returns the offset where the next part of the
1915 * buffer starts, which may be @ielen if the entire (remainder)
1916 * of the buffer should be used.
1917 */
1918size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1919 const u8 *ids, int n_ids, size_t offset)
1920{
1921 size_t pos = offset;
1922
1923 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1924 pos += 2 + ies[pos + 1];
1925
1926 return pos;
1927}
1928
1929size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1930{
1931 size_t pos = offset;
1932
1933 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1934 pos += 2 + ies[pos + 1];
1935
1936 return pos;
1937}
1938
1939static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1940 int rssi_min_thold,
1941 int rssi_max_thold)
1942{
1943 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1944
1945 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1946 return;
1947
1948 /*
1949 * Scale up threshold values before storing it, as the RSSI averaging
1950 * algorithm uses a scaled up value as well. Change this scaling
1951 * factor if the RSSI averaging algorithm changes.
1952 */
1953 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1954 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1955}
1956
1957void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1958 int rssi_min_thold,
1959 int rssi_max_thold)
1960{
1961 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1962
1963 WARN_ON(rssi_min_thold == rssi_max_thold ||
1964 rssi_min_thold > rssi_max_thold);
1965
1966 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1967 rssi_max_thold);
1968}
1969EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1970
1971void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1972{
1973 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1974
1975 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1976}
1977EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1978
1979u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1980 u16 cap)
1981{
1982 __le16 tmp;
1983
1984 *pos++ = WLAN_EID_HT_CAPABILITY;
1985 *pos++ = sizeof(struct ieee80211_ht_cap);
1986 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1987
1988 /* capability flags */
1989 tmp = cpu_to_le16(cap);
1990 memcpy(pos, &tmp, sizeof(u16));
1991 pos += sizeof(u16);
1992
1993 /* AMPDU parameters */
1994 *pos++ = ht_cap->ampdu_factor |
1995 (ht_cap->ampdu_density <<
1996 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1997
1998 /* MCS set */
1999 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2000 pos += sizeof(ht_cap->mcs);
2001
2002 /* extended capabilities */
2003 pos += sizeof(__le16);
2004
2005 /* BF capabilities */
2006 pos += sizeof(__le32);
2007
2008 /* antenna selection */
2009 pos += sizeof(u8);
2010
2011 return pos;
2012}
2013
2014u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2015 u32 cap)
2016{
2017 __le32 tmp;
2018
2019 *pos++ = WLAN_EID_VHT_CAPABILITY;
2020 *pos++ = sizeof(struct ieee80211_vht_cap);
2021 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2022
2023 /* capability flags */
2024 tmp = cpu_to_le32(cap);
2025 memcpy(pos, &tmp, sizeof(u32));
2026 pos += sizeof(u32);
2027
2028 /* VHT MCS set */
2029 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2030 pos += sizeof(vht_cap->vht_mcs);
2031
2032 return pos;
2033}
2034
2035u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2036 const struct cfg80211_chan_def *chandef,
2037 u16 prot_mode)
2038{
2039 struct ieee80211_ht_operation *ht_oper;
2040 /* Build HT Information */
2041 *pos++ = WLAN_EID_HT_OPERATION;
2042 *pos++ = sizeof(struct ieee80211_ht_operation);
2043 ht_oper = (struct ieee80211_ht_operation *)pos;
2044 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2045 chandef->chan->center_freq);
2046 switch (chandef->width) {
2047 case NL80211_CHAN_WIDTH_160:
2048 case NL80211_CHAN_WIDTH_80P80:
2049 case NL80211_CHAN_WIDTH_80:
2050 case NL80211_CHAN_WIDTH_40:
2051 if (chandef->center_freq1 > chandef->chan->center_freq)
2052 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2053 else
2054 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2055 break;
2056 default:
2057 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2058 break;
2059 }
2060 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2061 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2062 chandef->width != NL80211_CHAN_WIDTH_20)
2063 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2064
2065 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2066 ht_oper->stbc_param = 0x0000;
2067
2068 /* It seems that Basic MCS set and Supported MCS set
2069 are identical for the first 10 bytes */
2070 memset(&ht_oper->basic_set, 0, 16);
2071 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2072
2073 return pos + sizeof(struct ieee80211_ht_operation);
2074}
2075
2076void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2077 const struct ieee80211_ht_operation *ht_oper,
2078 struct cfg80211_chan_def *chandef)
2079{
2080 enum nl80211_channel_type channel_type;
2081
2082 if (!ht_oper) {
2083 cfg80211_chandef_create(chandef, control_chan,
2084 NL80211_CHAN_NO_HT);
2085 return;
2086 }
2087
2088 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2089 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2090 channel_type = NL80211_CHAN_HT20;
2091 break;
2092 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2093 channel_type = NL80211_CHAN_HT40PLUS;
2094 break;
2095 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2096 channel_type = NL80211_CHAN_HT40MINUS;
2097 break;
2098 default:
2099 channel_type = NL80211_CHAN_NO_HT;
2100 }
2101
2102 cfg80211_chandef_create(chandef, control_chan, channel_type);
2103}
2104
2105int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2106 const struct ieee80211_supported_band *sband,
2107 const u8 *srates, int srates_len, u32 *rates)
2108{
2109 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2110 int shift = ieee80211_chandef_get_shift(chandef);
2111 struct ieee80211_rate *br;
2112 int brate, rate, i, j, count = 0;
2113
2114 *rates = 0;
2115
2116 for (i = 0; i < srates_len; i++) {
2117 rate = srates[i] & 0x7f;
2118
2119 for (j = 0; j < sband->n_bitrates; j++) {
2120 br = &sband->bitrates[j];
2121 if ((rate_flags & br->flags) != rate_flags)
2122 continue;
2123
2124 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2125 if (brate == rate) {
2126 *rates |= BIT(j);
2127 count++;
2128 break;
2129 }
2130 }
2131 }
2132 return count;
2133}
2134
2135int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2136 struct sk_buff *skb, bool need_basic,
2137 enum ieee80211_band band)
2138{
2139 struct ieee80211_local *local = sdata->local;
2140 struct ieee80211_supported_band *sband;
2141 int rate, shift;
2142 u8 i, rates, *pos;
2143 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2144 u32 rate_flags;
2145
2146 shift = ieee80211_vif_get_shift(&sdata->vif);
2147 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2148 sband = local->hw.wiphy->bands[band];
2149 rates = 0;
2150 for (i = 0; i < sband->n_bitrates; i++) {
2151 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2152 continue;
2153 rates++;
2154 }
2155 if (rates > 8)
2156 rates = 8;
2157
2158 if (skb_tailroom(skb) < rates + 2)
2159 return -ENOMEM;
2160
2161 pos = skb_put(skb, rates + 2);
2162 *pos++ = WLAN_EID_SUPP_RATES;
2163 *pos++ = rates;
2164 for (i = 0; i < rates; i++) {
2165 u8 basic = 0;
2166 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2167 continue;
2168
2169 if (need_basic && basic_rates & BIT(i))
2170 basic = 0x80;
2171 rate = sband->bitrates[i].bitrate;
2172 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2173 5 * (1 << shift));
2174 *pos++ = basic | (u8) rate;
2175 }
2176
2177 return 0;
2178}
2179
2180int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2181 struct sk_buff *skb, bool need_basic,
2182 enum ieee80211_band band)
2183{
2184 struct ieee80211_local *local = sdata->local;
2185 struct ieee80211_supported_band *sband;
2186 int rate, shift;
2187 u8 i, exrates, *pos;
2188 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2189 u32 rate_flags;
2190
2191 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2192 shift = ieee80211_vif_get_shift(&sdata->vif);
2193
2194 sband = local->hw.wiphy->bands[band];
2195 exrates = 0;
2196 for (i = 0; i < sband->n_bitrates; i++) {
2197 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2198 continue;
2199 exrates++;
2200 }
2201
2202 if (exrates > 8)
2203 exrates -= 8;
2204 else
2205 exrates = 0;
2206
2207 if (skb_tailroom(skb) < exrates + 2)
2208 return -ENOMEM;
2209
2210 if (exrates) {
2211 pos = skb_put(skb, exrates + 2);
2212 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2213 *pos++ = exrates;
2214 for (i = 8; i < sband->n_bitrates; i++) {
2215 u8 basic = 0;
2216 if ((rate_flags & sband->bitrates[i].flags)
2217 != rate_flags)
2218 continue;
2219 if (need_basic && basic_rates & BIT(i))
2220 basic = 0x80;
2221 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2222 5 * (1 << shift));
2223 *pos++ = basic | (u8) rate;
2224 }
2225 }
2226 return 0;
2227}
2228
2229int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2230{
2231 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2233
2234 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2235 /* non-managed type inferfaces */
2236 return 0;
2237 }
2238 return ifmgd->ave_beacon_signal / 16;
2239}
2240EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2241
2242u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2243{
2244 if (!mcs)
2245 return 1;
2246
2247 /* TODO: consider rx_highest */
2248
2249 if (mcs->rx_mask[3])
2250 return 4;
2251 if (mcs->rx_mask[2])
2252 return 3;
2253 if (mcs->rx_mask[1])
2254 return 2;
2255 return 1;
2256}
2257
2258/**
2259 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2260 * @local: mac80211 hw info struct
2261 * @status: RX status
2262 * @mpdu_len: total MPDU length (including FCS)
2263 * @mpdu_offset: offset into MPDU to calculate timestamp at
2264 *
2265 * This function calculates the RX timestamp at the given MPDU offset, taking
2266 * into account what the RX timestamp was. An offset of 0 will just normalize
2267 * the timestamp to TSF at beginning of MPDU reception.
2268 */
2269u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2270 struct ieee80211_rx_status *status,
2271 unsigned int mpdu_len,
2272 unsigned int mpdu_offset)
2273{
2274 u64 ts = status->mactime;
2275 struct rate_info ri;
2276 u16 rate;
2277
2278 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2279 return 0;
2280
2281 memset(&ri, 0, sizeof(ri));
2282
2283 /* Fill cfg80211 rate info */
2284 if (status->flag & RX_FLAG_HT) {
2285 ri.mcs = status->rate_idx;
2286 ri.flags |= RATE_INFO_FLAGS_MCS;
2287 if (status->flag & RX_FLAG_40MHZ)
2288 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2289 if (status->flag & RX_FLAG_SHORT_GI)
2290 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2291 } else if (status->flag & RX_FLAG_VHT) {
2292 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2293 ri.mcs = status->rate_idx;
2294 ri.nss = status->vht_nss;
2295 if (status->flag & RX_FLAG_40MHZ)
2296 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2297 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2298 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2299 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2300 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2301 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2302 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2303 if (status->flag & RX_FLAG_SHORT_GI)
2304 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2305 } else {
2306 struct ieee80211_supported_band *sband;
2307 int shift = 0;
2308 int bitrate;
2309
2310 if (status->flag & RX_FLAG_10MHZ)
2311 shift = 1;
2312 if (status->flag & RX_FLAG_5MHZ)
2313 shift = 2;
2314
2315 sband = local->hw.wiphy->bands[status->band];
2316 bitrate = sband->bitrates[status->rate_idx].bitrate;
2317 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2318 }
2319
2320 rate = cfg80211_calculate_bitrate(&ri);
2321 if (WARN_ONCE(!rate,
2322 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2323 status->flag, status->rate_idx, status->vht_nss))
2324 return 0;
2325
2326 /* rewind from end of MPDU */
2327 if (status->flag & RX_FLAG_MACTIME_END)
2328 ts -= mpdu_len * 8 * 10 / rate;
2329
2330 ts += mpdu_offset * 8 * 10 / rate;
2331
2332 return ts;
2333}
2334
2335void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2336{
2337 struct ieee80211_sub_if_data *sdata;
2338 struct cfg80211_chan_def chandef;
2339
2340 mutex_lock(&local->mtx);
2341 mutex_lock(&local->iflist_mtx);
2342 list_for_each_entry(sdata, &local->interfaces, list) {
2343 /* it might be waiting for the local->mtx, but then
2344 * by the time it gets it, sdata->wdev.cac_started
2345 * will no longer be true
2346 */
2347 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2348
2349 if (sdata->wdev.cac_started) {
2350 chandef = sdata->vif.bss_conf.chandef;
2351 ieee80211_vif_release_channel(sdata);
2352 cfg80211_cac_event(sdata->dev,
2353 &chandef,
2354 NL80211_RADAR_CAC_ABORTED,
2355 GFP_KERNEL);
2356 }
2357 }
2358 mutex_unlock(&local->iflist_mtx);
2359 mutex_unlock(&local->mtx);
2360}
2361
2362void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2363{
2364 struct ieee80211_local *local =
2365 container_of(work, struct ieee80211_local, radar_detected_work);
2366 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2367
2368 ieee80211_dfs_cac_cancel(local);
2369
2370 if (local->use_chanctx)
2371 /* currently not handled */
2372 WARN_ON(1);
2373 else
2374 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2375}
2376
2377void ieee80211_radar_detected(struct ieee80211_hw *hw)
2378{
2379 struct ieee80211_local *local = hw_to_local(hw);
2380
2381 trace_api_radar_detected(local);
2382
2383 ieee80211_queue_work(hw, &local->radar_detected_work);
2384}
2385EXPORT_SYMBOL(ieee80211_radar_detected);
2386
2387u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2388{
2389 u32 ret;
2390 int tmp;
2391
2392 switch (c->width) {
2393 case NL80211_CHAN_WIDTH_20:
2394 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2395 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2396 break;
2397 case NL80211_CHAN_WIDTH_40:
2398 c->width = NL80211_CHAN_WIDTH_20;
2399 c->center_freq1 = c->chan->center_freq;
2400 ret = IEEE80211_STA_DISABLE_40MHZ |
2401 IEEE80211_STA_DISABLE_VHT;
2402 break;
2403 case NL80211_CHAN_WIDTH_80:
2404 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2405 /* n_P40 */
2406 tmp /= 2;
2407 /* freq_P40 */
2408 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2409 c->width = NL80211_CHAN_WIDTH_40;
2410 ret = IEEE80211_STA_DISABLE_VHT;
2411 break;
2412 case NL80211_CHAN_WIDTH_80P80:
2413 c->center_freq2 = 0;
2414 c->width = NL80211_CHAN_WIDTH_80;
2415 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2416 IEEE80211_STA_DISABLE_160MHZ;
2417 break;
2418 case NL80211_CHAN_WIDTH_160:
2419 /* n_P20 */
2420 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2421 /* n_P80 */
2422 tmp /= 4;
2423 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2424 c->width = NL80211_CHAN_WIDTH_80;
2425 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2426 IEEE80211_STA_DISABLE_160MHZ;
2427 break;
2428 default:
2429 case NL80211_CHAN_WIDTH_20_NOHT:
2430 WARN_ON_ONCE(1);
2431 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2432 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2433 break;
2434 case NL80211_CHAN_WIDTH_5:
2435 case NL80211_CHAN_WIDTH_10:
2436 WARN_ON_ONCE(1);
2437 /* keep c->width */
2438 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2439 break;
2440 }
2441
2442 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2443
2444 return ret;
2445}
2446
2447/*
2448 * Returns true if smps_mode_new is strictly more restrictive than
2449 * smps_mode_old.
2450 */
2451bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2452 enum ieee80211_smps_mode smps_mode_new)
2453{
2454 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2455 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2456 return false;
2457
2458 switch (smps_mode_old) {
2459 case IEEE80211_SMPS_STATIC:
2460 return false;
2461 case IEEE80211_SMPS_DYNAMIC:
2462 return smps_mode_new == IEEE80211_SMPS_STATIC;
2463 case IEEE80211_SMPS_OFF:
2464 return smps_mode_new != IEEE80211_SMPS_OFF;
2465 default:
2466 WARN_ON(1);
2467 }
2468
2469 return false;
2470}
2471
2472int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2473 struct cfg80211_csa_settings *csa_settings)
2474{
2475 struct sk_buff *skb;
2476 struct ieee80211_mgmt *mgmt;
2477 struct ieee80211_local *local = sdata->local;
2478 int freq;
2479 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2480 sizeof(mgmt->u.action.u.chan_switch);
2481 u8 *pos;
2482
2483 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2484 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2485 return -EOPNOTSUPP;
2486
2487 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2488 5 + /* channel switch announcement element */
2489 3 + /* secondary channel offset element */
2490 8); /* mesh channel switch parameters element */
2491 if (!skb)
2492 return -ENOMEM;
2493
2494 skb_reserve(skb, local->tx_headroom);
2495 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2496 memset(mgmt, 0, hdr_len);
2497 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2498 IEEE80211_STYPE_ACTION);
2499
2500 eth_broadcast_addr(mgmt->da);
2501 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2502 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2503 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2504 } else {
2505 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2506 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2507 }
2508 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2509 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2510 pos = skb_put(skb, 5);
2511 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2512 *pos++ = 3; /* IE length */
2513 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2514 freq = csa_settings->chandef.chan->center_freq;
2515 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2516 *pos++ = csa_settings->count; /* count */
2517
2518 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2519 enum nl80211_channel_type ch_type;
2520
2521 skb_put(skb, 3);
2522 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2523 *pos++ = 1; /* IE length */
2524 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2525 if (ch_type == NL80211_CHAN_HT40PLUS)
2526 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2527 else
2528 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2529 }
2530
2531 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2532 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2533
2534 skb_put(skb, 8);
2535 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2536 *pos++ = 6; /* IE length */
2537 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2538 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2539 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2540 *pos++ |= csa_settings->block_tx ?
2541 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2542 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2543 pos += 2;
2544 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2545 pos += 2;
2546 }
2547
2548 ieee80211_tx_skb(sdata, skb);
2549 return 0;
2550}
2551
2552bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2553{
2554 return !(cs == NULL || cs->cipher == 0 ||
2555 cs->hdr_len < cs->pn_len + cs->pn_off ||
2556 cs->hdr_len <= cs->key_idx_off ||
2557 cs->key_idx_shift > 7 ||
2558 cs->key_idx_mask == 0);
2559}
2560
2561bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2562{
2563 int i;
2564
2565 /* Ensure we have enough iftype bitmap space for all iftype values */
2566 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2567
2568 for (i = 0; i < n; i++)
2569 if (!ieee80211_cs_valid(&cs[i]))
2570 return false;
2571
2572 return true;
2573}
2574
2575const struct ieee80211_cipher_scheme *
2576ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2577 enum nl80211_iftype iftype)
2578{
2579 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2580 int n = local->hw.n_cipher_schemes;
2581 int i;
2582 const struct ieee80211_cipher_scheme *cs = NULL;
2583
2584 for (i = 0; i < n; i++) {
2585 if (l[i].cipher == cipher) {
2586 cs = &l[i];
2587 break;
2588 }
2589 }
2590
2591 if (!cs || !(cs->iftype & BIT(iftype)))
2592 return NULL;
2593
2594 return cs;
2595}
2596
2597int ieee80211_cs_headroom(struct ieee80211_local *local,
2598 struct cfg80211_crypto_settings *crypto,
2599 enum nl80211_iftype iftype)
2600{
2601 const struct ieee80211_cipher_scheme *cs;
2602 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2603 int i;
2604
2605 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2606 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2607 iftype);
2608
2609 if (cs && headroom < cs->hdr_len)
2610 headroom = cs->hdr_len;
2611 }
2612
2613 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2614 if (cs && headroom < cs->hdr_len)
2615 headroom = cs->hdr_len;
2616
2617 return headroom;
2618}
2619
2620static bool
2621ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2622{
2623 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2624 int skip;
2625
2626 if (end > 0)
2627 return false;
2628
2629 /* End time is in the past, check for repetitions */
2630 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2631 if (data->count[i] < 255) {
2632 if (data->count[i] <= skip) {
2633 data->count[i] = 0;
2634 return false;
2635 }
2636
2637 data->count[i] -= skip;
2638 }
2639
2640 data->desc[i].start += skip * data->desc[i].interval;
2641
2642 return true;
2643}
2644
2645static bool
2646ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2647 s32 *offset)
2648{
2649 bool ret = false;
2650 int i;
2651
2652 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2653 s32 cur;
2654
2655 if (!data->count[i])
2656 continue;
2657
2658 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2659 ret = true;
2660
2661 cur = data->desc[i].start - tsf;
2662 if (cur > *offset)
2663 continue;
2664
2665 cur = data->desc[i].start + data->desc[i].duration - tsf;
2666 if (cur > *offset)
2667 *offset = cur;
2668 }
2669
2670 return ret;
2671}
2672
2673static u32
2674ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2675{
2676 s32 offset = 0;
2677 int tries = 0;
2678 /*
2679 * arbitrary limit, used to avoid infinite loops when combined NoA
2680 * descriptors cover the full time period.
2681 */
2682 int max_tries = 5;
2683
2684 ieee80211_extend_absent_time(data, tsf, &offset);
2685 do {
2686 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2687 break;
2688
2689 tries++;
2690 } while (tries < max_tries);
2691
2692 return offset;
2693}
2694
2695void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2696{
2697 u32 next_offset = BIT(31) - 1;
2698 int i;
2699
2700 data->absent = 0;
2701 data->has_next_tsf = false;
2702 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2703 s32 start;
2704
2705 if (!data->count[i])
2706 continue;
2707
2708 ieee80211_extend_noa_desc(data, tsf, i);
2709 start = data->desc[i].start - tsf;
2710 if (start <= 0)
2711 data->absent |= BIT(i);
2712
2713 if (next_offset > start)
2714 next_offset = start;
2715
2716 data->has_next_tsf = true;
2717 }
2718
2719 if (data->absent)
2720 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2721
2722 data->next_tsf = tsf + next_offset;
2723}
2724EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2725
2726int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2727 struct ieee80211_noa_data *data, u32 tsf)
2728{
2729 int ret = 0;
2730 int i;
2731
2732 memset(data, 0, sizeof(*data));
2733
2734 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2735 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2736
2737 if (!desc->count || !desc->duration)
2738 continue;
2739
2740 data->count[i] = desc->count;
2741 data->desc[i].start = le32_to_cpu(desc->start_time);
2742 data->desc[i].duration = le32_to_cpu(desc->duration);
2743 data->desc[i].interval = le32_to_cpu(desc->interval);
2744
2745 if (data->count[i] > 1 &&
2746 data->desc[i].interval < data->desc[i].duration)
2747 continue;
2748
2749 ieee80211_extend_noa_desc(data, tsf, i);
2750 ret++;
2751 }
2752
2753 if (ret)
2754 ieee80211_update_p2p_noa(data, tsf);
2755
2756 return ret;
2757}
2758EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2759
2760void ieee80211_recalc_dtim(struct ieee80211_local *local,
2761 struct ieee80211_sub_if_data *sdata)
2762{
2763 u64 tsf = drv_get_tsf(local, sdata);
2764 u64 dtim_count = 0;
2765 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2766 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2767 struct ps_data *ps;
2768 u8 bcns_from_dtim;
2769
2770 if (tsf == -1ULL || !beacon_int || !dtim_period)
2771 return;
2772
2773 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2774 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2775 if (!sdata->bss)
2776 return;
2777
2778 ps = &sdata->bss->ps;
2779 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2780 ps = &sdata->u.mesh.ps;
2781 } else {
2782 return;
2783 }
2784
2785 /*
2786 * actually finds last dtim_count, mac80211 will update in
2787 * __beacon_add_tim().
2788 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2789 */
2790 do_div(tsf, beacon_int);
2791 bcns_from_dtim = do_div(tsf, dtim_period);
2792 /* just had a DTIM */
2793 if (!bcns_from_dtim)
2794 dtim_count = 0;
2795 else
2796 dtim_count = dtim_period - bcns_from_dtim;
2797
2798 ps->dtim_count = dtim_count;
2799}