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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 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018 Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * utilities for mac80211
15 */
16
17#include <net/mac80211.h>
18#include <linux/netdevice.h>
19#include <linux/export.h>
20#include <linux/types.h>
21#include <linux/slab.h>
22#include <linux/skbuff.h>
23#include <linux/etherdevice.h>
24#include <linux/if_arp.h>
25#include <linux/bitmap.h>
26#include <linux/crc32.h>
27#include <net/net_namespace.h>
28#include <net/cfg80211.h>
29#include <net/rtnetlink.h>
30
31#include "ieee80211_i.h"
32#include "driver-ops.h"
33#include "rate.h"
34#include "mesh.h"
35#include "wme.h"
36#include "led.h"
37#include "wep.h"
38
39/* privid for wiphys to determine whether they belong to us or not */
40const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41
42struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43{
44 struct ieee80211_local *local;
45 BUG_ON(!wiphy);
46
47 local = wiphy_priv(wiphy);
48 return &local->hw;
49}
50EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51
52void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
53{
54 struct sk_buff *skb;
55 struct ieee80211_hdr *hdr;
56
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
60 }
61}
62
63int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
65 int shift)
66{
67 int dur;
68
69 /* calculate duration (in microseconds, rounded up to next higher
70 * integer if it includes a fractional microsecond) to send frame of
71 * len bytes (does not include FCS) at the given rate. Duration will
72 * also include SIFS.
73 *
74 * rate is in 100 kbps, so divident is multiplied by 10 in the
75 * DIV_ROUND_UP() operations.
76 *
77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
78 * is assumed to be 0 otherwise.
79 */
80
81 if (band == NL80211_BAND_5GHZ || erp) {
82 /*
83 * OFDM:
84 *
85 * N_DBPS = DATARATE x 4
86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
87 * (16 = SIGNAL time, 6 = tail bits)
88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
89 *
90 * T_SYM = 4 usec
91 * 802.11a - 18.5.2: aSIFSTime = 16 usec
92 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
93 * signal ext = 6 usec
94 */
95 dur = 16; /* SIFS + signal ext */
96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98
99 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 4 for 5 MHz
101 * * times 2 for 10 MHz
102 */
103 dur *= 1 << shift;
104
105 /* rates should already consider the channel bandwidth,
106 * don't apply divisor again.
107 */
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate); /* T_SYM x N_SYM */
110 } else {
111 /*
112 * 802.11b or 802.11g with 802.11b compatibility:
113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 *
116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117 * aSIFSTime = 10 usec
118 * aPreambleLength = 144 usec or 72 usec with short preamble
119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 */
121 dur = 10; /* aSIFSTime = 10 usec */
122 dur += short_preamble ? (72 + 24) : (144 + 48);
123
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
125 }
126
127 return dur;
128}
129
130/* Exported duration function for driver use */
131__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
134 size_t frame_len,
135 struct ieee80211_rate *rate)
136{
137 struct ieee80211_sub_if_data *sdata;
138 u16 dur;
139 int erp, shift = 0;
140 bool short_preamble = false;
141
142 erp = 0;
143 if (vif) {
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
149 }
150
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
153
154 return cpu_to_le16(dur);
155}
156EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157
158__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
161{
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
165 bool short_preamble;
166 int erp, shift = 0, bitrate;
167 u16 dur;
168 struct ieee80211_supported_band *sband;
169
170 sband = local->hw.wiphy->bands[frame_txctl->band];
171
172 short_preamble = false;
173
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
175
176 erp = 0;
177 if (vif) {
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
183 }
184
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
186
187 /* CTS duration */
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190 /* Data frame duration */
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
193 /* ACK duration */
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
196
197 return cpu_to_le16(dur);
198}
199EXPORT_SYMBOL(ieee80211_rts_duration);
200
201__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
203 size_t frame_len,
204 const struct ieee80211_tx_info *frame_txctl)
205{
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
209 bool short_preamble;
210 int erp, shift = 0, bitrate;
211 u16 dur;
212 struct ieee80211_supported_band *sband;
213
214 sband = local->hw.wiphy->bands[frame_txctl->band];
215
216 short_preamble = false;
217
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
219 erp = 0;
220 if (vif) {
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
226 }
227
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229
230 /* Data frame duration */
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234 /* ACK duration */
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 }
238
239 return cpu_to_le16(dur);
240}
241EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242
243void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
244{
245 struct ieee80211_sub_if_data *sdata;
246 int n_acs = IEEE80211_NUM_ACS;
247
248 if (local->ops->wake_tx_queue)
249 return;
250
251 if (local->hw.queues < IEEE80211_NUM_ACS)
252 n_acs = 1;
253
254 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
255 int ac;
256
257 if (!sdata->dev)
258 continue;
259
260 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
261 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
262 continue;
263
264 for (ac = 0; ac < n_acs; ac++) {
265 int ac_queue = sdata->vif.hw_queue[ac];
266
267 if (ac_queue == queue ||
268 (sdata->vif.cab_queue == queue &&
269 local->queue_stop_reasons[ac_queue] == 0 &&
270 skb_queue_empty(&local->pending[ac_queue])))
271 netif_wake_subqueue(sdata->dev, ac);
272 }
273 }
274}
275
276static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
277 enum queue_stop_reason reason,
278 bool refcounted)
279{
280 struct ieee80211_local *local = hw_to_local(hw);
281
282 trace_wake_queue(local, queue, reason);
283
284 if (WARN_ON(queue >= hw->queues))
285 return;
286
287 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
288 return;
289
290 if (!refcounted) {
291 local->q_stop_reasons[queue][reason] = 0;
292 } else {
293 local->q_stop_reasons[queue][reason]--;
294 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
295 local->q_stop_reasons[queue][reason] = 0;
296 }
297
298 if (local->q_stop_reasons[queue][reason] == 0)
299 __clear_bit(reason, &local->queue_stop_reasons[queue]);
300
301 if (local->queue_stop_reasons[queue] != 0)
302 /* someone still has this queue stopped */
303 return;
304
305 if (skb_queue_empty(&local->pending[queue])) {
306 rcu_read_lock();
307 ieee80211_propagate_queue_wake(local, queue);
308 rcu_read_unlock();
309 } else
310 tasklet_schedule(&local->tx_pending_tasklet);
311}
312
313void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
314 enum queue_stop_reason reason,
315 bool refcounted)
316{
317 struct ieee80211_local *local = hw_to_local(hw);
318 unsigned long flags;
319
320 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
321 __ieee80211_wake_queue(hw, queue, reason, refcounted);
322 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
323}
324
325void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
326{
327 ieee80211_wake_queue_by_reason(hw, queue,
328 IEEE80211_QUEUE_STOP_REASON_DRIVER,
329 false);
330}
331EXPORT_SYMBOL(ieee80211_wake_queue);
332
333static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason,
335 bool refcounted)
336{
337 struct ieee80211_local *local = hw_to_local(hw);
338 struct ieee80211_sub_if_data *sdata;
339 int n_acs = IEEE80211_NUM_ACS;
340
341 trace_stop_queue(local, queue, reason);
342
343 if (WARN_ON(queue >= hw->queues))
344 return;
345
346 if (!refcounted)
347 local->q_stop_reasons[queue][reason] = 1;
348 else
349 local->q_stop_reasons[queue][reason]++;
350
351 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
352 return;
353
354 if (local->ops->wake_tx_queue)
355 return;
356
357 if (local->hw.queues < IEEE80211_NUM_ACS)
358 n_acs = 1;
359
360 rcu_read_lock();
361 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
362 int ac;
363
364 if (!sdata->dev)
365 continue;
366
367 for (ac = 0; ac < n_acs; ac++) {
368 if (sdata->vif.hw_queue[ac] == queue ||
369 sdata->vif.cab_queue == queue)
370 netif_stop_subqueue(sdata->dev, ac);
371 }
372 }
373 rcu_read_unlock();
374}
375
376void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
377 enum queue_stop_reason reason,
378 bool refcounted)
379{
380 struct ieee80211_local *local = hw_to_local(hw);
381 unsigned long flags;
382
383 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
384 __ieee80211_stop_queue(hw, queue, reason, refcounted);
385 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
386}
387
388void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
389{
390 ieee80211_stop_queue_by_reason(hw, queue,
391 IEEE80211_QUEUE_STOP_REASON_DRIVER,
392 false);
393}
394EXPORT_SYMBOL(ieee80211_stop_queue);
395
396void ieee80211_add_pending_skb(struct ieee80211_local *local,
397 struct sk_buff *skb)
398{
399 struct ieee80211_hw *hw = &local->hw;
400 unsigned long flags;
401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
402 int queue = info->hw_queue;
403
404 if (WARN_ON(!info->control.vif)) {
405 ieee80211_free_txskb(&local->hw, skb);
406 return;
407 }
408
409 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
410 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
411 false);
412 __skb_queue_tail(&local->pending[queue], skb);
413 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
414 false);
415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
416}
417
418void ieee80211_add_pending_skbs(struct ieee80211_local *local,
419 struct sk_buff_head *skbs)
420{
421 struct ieee80211_hw *hw = &local->hw;
422 struct sk_buff *skb;
423 unsigned long flags;
424 int queue, i;
425
426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
427 while ((skb = skb_dequeue(skbs))) {
428 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
429
430 if (WARN_ON(!info->control.vif)) {
431 ieee80211_free_txskb(&local->hw, skb);
432 continue;
433 }
434
435 queue = info->hw_queue;
436
437 __ieee80211_stop_queue(hw, queue,
438 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
439 false);
440
441 __skb_queue_tail(&local->pending[queue], skb);
442 }
443
444 for (i = 0; i < hw->queues; i++)
445 __ieee80211_wake_queue(hw, i,
446 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
447 false);
448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449}
450
451void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
452 unsigned long queues,
453 enum queue_stop_reason reason,
454 bool refcounted)
455{
456 struct ieee80211_local *local = hw_to_local(hw);
457 unsigned long flags;
458 int i;
459
460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
461
462 for_each_set_bit(i, &queues, hw->queues)
463 __ieee80211_stop_queue(hw, i, reason, refcounted);
464
465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
466}
467
468void ieee80211_stop_queues(struct ieee80211_hw *hw)
469{
470 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
471 IEEE80211_QUEUE_STOP_REASON_DRIVER,
472 false);
473}
474EXPORT_SYMBOL(ieee80211_stop_queues);
475
476int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
477{
478 struct ieee80211_local *local = hw_to_local(hw);
479 unsigned long flags;
480 int ret;
481
482 if (WARN_ON(queue >= hw->queues))
483 return true;
484
485 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
486 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
487 &local->queue_stop_reasons[queue]);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 return ret;
490}
491EXPORT_SYMBOL(ieee80211_queue_stopped);
492
493void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 unsigned long queues,
495 enum queue_stop_reason reason,
496 bool refcounted)
497{
498 struct ieee80211_local *local = hw_to_local(hw);
499 unsigned long flags;
500 int i;
501
502 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
503
504 for_each_set_bit(i, &queues, hw->queues)
505 __ieee80211_wake_queue(hw, i, reason, refcounted);
506
507 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
508}
509
510void ieee80211_wake_queues(struct ieee80211_hw *hw)
511{
512 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
513 IEEE80211_QUEUE_STOP_REASON_DRIVER,
514 false);
515}
516EXPORT_SYMBOL(ieee80211_wake_queues);
517
518static unsigned int
519ieee80211_get_vif_queues(struct ieee80211_local *local,
520 struct ieee80211_sub_if_data *sdata)
521{
522 unsigned int queues;
523
524 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
525 int ac;
526
527 queues = 0;
528
529 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
530 queues |= BIT(sdata->vif.hw_queue[ac]);
531 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
532 queues |= BIT(sdata->vif.cab_queue);
533 } else {
534 /* all queues */
535 queues = BIT(local->hw.queues) - 1;
536 }
537
538 return queues;
539}
540
541void __ieee80211_flush_queues(struct ieee80211_local *local,
542 struct ieee80211_sub_if_data *sdata,
543 unsigned int queues, bool drop)
544{
545 if (!local->ops->flush)
546 return;
547
548 /*
549 * If no queue was set, or if the HW doesn't support
550 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
551 */
552 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
553 queues = ieee80211_get_vif_queues(local, sdata);
554
555 ieee80211_stop_queues_by_reason(&local->hw, queues,
556 IEEE80211_QUEUE_STOP_REASON_FLUSH,
557 false);
558
559 drv_flush(local, sdata, queues, drop);
560
561 ieee80211_wake_queues_by_reason(&local->hw, queues,
562 IEEE80211_QUEUE_STOP_REASON_FLUSH,
563 false);
564}
565
566void ieee80211_flush_queues(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata, bool drop)
568{
569 __ieee80211_flush_queues(local, sdata, 0, drop);
570}
571
572void ieee80211_stop_vif_queues(struct ieee80211_local *local,
573 struct ieee80211_sub_if_data *sdata,
574 enum queue_stop_reason reason)
575{
576 ieee80211_stop_queues_by_reason(&local->hw,
577 ieee80211_get_vif_queues(local, sdata),
578 reason, true);
579}
580
581void ieee80211_wake_vif_queues(struct ieee80211_local *local,
582 struct ieee80211_sub_if_data *sdata,
583 enum queue_stop_reason reason)
584{
585 ieee80211_wake_queues_by_reason(&local->hw,
586 ieee80211_get_vif_queues(local, sdata),
587 reason, true);
588}
589
590static void __iterate_interfaces(struct ieee80211_local *local,
591 u32 iter_flags,
592 void (*iterator)(void *data, u8 *mac,
593 struct ieee80211_vif *vif),
594 void *data)
595{
596 struct ieee80211_sub_if_data *sdata;
597 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
598
599 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
600 switch (sdata->vif.type) {
601 case NL80211_IFTYPE_MONITOR:
602 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
603 continue;
604 break;
605 case NL80211_IFTYPE_AP_VLAN:
606 continue;
607 default:
608 break;
609 }
610 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
611 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
612 continue;
613 if (ieee80211_sdata_running(sdata) || !active_only)
614 iterator(data, sdata->vif.addr,
615 &sdata->vif);
616 }
617
618 sdata = rcu_dereference_check(local->monitor_sdata,
619 lockdep_is_held(&local->iflist_mtx) ||
620 lockdep_rtnl_is_held());
621 if (sdata &&
622 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
623 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
624 iterator(data, sdata->vif.addr, &sdata->vif);
625}
626
627void ieee80211_iterate_interfaces(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
631 void *data)
632{
633 struct ieee80211_local *local = hw_to_local(hw);
634
635 mutex_lock(&local->iflist_mtx);
636 __iterate_interfaces(local, iter_flags, iterator, data);
637 mutex_unlock(&local->iflist_mtx);
638}
639EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
640
641void ieee80211_iterate_active_interfaces_atomic(
642 struct ieee80211_hw *hw, u32 iter_flags,
643 void (*iterator)(void *data, u8 *mac,
644 struct ieee80211_vif *vif),
645 void *data)
646{
647 struct ieee80211_local *local = hw_to_local(hw);
648
649 rcu_read_lock();
650 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
651 iterator, data);
652 rcu_read_unlock();
653}
654EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
655
656void ieee80211_iterate_active_interfaces_rtnl(
657 struct ieee80211_hw *hw, u32 iter_flags,
658 void (*iterator)(void *data, u8 *mac,
659 struct ieee80211_vif *vif),
660 void *data)
661{
662 struct ieee80211_local *local = hw_to_local(hw);
663
664 ASSERT_RTNL();
665
666 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
667 iterator, data);
668}
669EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
670
671static void __iterate_stations(struct ieee80211_local *local,
672 void (*iterator)(void *data,
673 struct ieee80211_sta *sta),
674 void *data)
675{
676 struct sta_info *sta;
677
678 list_for_each_entry_rcu(sta, &local->sta_list, list) {
679 if (!sta->uploaded)
680 continue;
681
682 iterator(data, &sta->sta);
683 }
684}
685
686void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
687 void (*iterator)(void *data,
688 struct ieee80211_sta *sta),
689 void *data)
690{
691 struct ieee80211_local *local = hw_to_local(hw);
692
693 rcu_read_lock();
694 __iterate_stations(local, iterator, data);
695 rcu_read_unlock();
696}
697EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
698
699struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
700{
701 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
702
703 if (!ieee80211_sdata_running(sdata) ||
704 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
705 return NULL;
706 return &sdata->vif;
707}
708EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
709
710struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
711{
712 struct ieee80211_sub_if_data *sdata;
713
714 if (!vif)
715 return NULL;
716
717 sdata = vif_to_sdata(vif);
718
719 if (!ieee80211_sdata_running(sdata) ||
720 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
721 return NULL;
722
723 return &sdata->wdev;
724}
725EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
726
727/*
728 * Nothing should have been stuffed into the workqueue during
729 * the suspend->resume cycle. Since we can't check each caller
730 * of this function if we are already quiescing / suspended,
731 * check here and don't WARN since this can actually happen when
732 * the rx path (for example) is racing against __ieee80211_suspend
733 * and suspending / quiescing was set after the rx path checked
734 * them.
735 */
736static bool ieee80211_can_queue_work(struct ieee80211_local *local)
737{
738 if (local->quiescing || (local->suspended && !local->resuming)) {
739 pr_warn("queueing ieee80211 work while going to suspend\n");
740 return false;
741 }
742
743 return true;
744}
745
746void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
747{
748 struct ieee80211_local *local = hw_to_local(hw);
749
750 if (!ieee80211_can_queue_work(local))
751 return;
752
753 queue_work(local->workqueue, work);
754}
755EXPORT_SYMBOL(ieee80211_queue_work);
756
757void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
758 struct delayed_work *dwork,
759 unsigned long delay)
760{
761 struct ieee80211_local *local = hw_to_local(hw);
762
763 if (!ieee80211_can_queue_work(local))
764 return;
765
766 queue_delayed_work(local->workqueue, dwork, delay);
767}
768EXPORT_SYMBOL(ieee80211_queue_delayed_work);
769
770u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
771 struct ieee802_11_elems *elems,
772 u64 filter, u32 crc)
773{
774 size_t left = len;
775 const u8 *pos = start;
776 bool calc_crc = filter != 0;
777 DECLARE_BITMAP(seen_elems, 256);
778 const u8 *ie;
779
780 bitmap_zero(seen_elems, 256);
781 memset(elems, 0, sizeof(*elems));
782 elems->ie_start = start;
783 elems->total_len = len;
784
785 while (left >= 2) {
786 u8 id, elen;
787 bool elem_parse_failed;
788
789 id = *pos++;
790 elen = *pos++;
791 left -= 2;
792
793 if (elen > left) {
794 elems->parse_error = true;
795 break;
796 }
797
798 switch (id) {
799 case WLAN_EID_SSID:
800 case WLAN_EID_SUPP_RATES:
801 case WLAN_EID_FH_PARAMS:
802 case WLAN_EID_DS_PARAMS:
803 case WLAN_EID_CF_PARAMS:
804 case WLAN_EID_TIM:
805 case WLAN_EID_IBSS_PARAMS:
806 case WLAN_EID_CHALLENGE:
807 case WLAN_EID_RSN:
808 case WLAN_EID_ERP_INFO:
809 case WLAN_EID_EXT_SUPP_RATES:
810 case WLAN_EID_HT_CAPABILITY:
811 case WLAN_EID_HT_OPERATION:
812 case WLAN_EID_VHT_CAPABILITY:
813 case WLAN_EID_VHT_OPERATION:
814 case WLAN_EID_MESH_ID:
815 case WLAN_EID_MESH_CONFIG:
816 case WLAN_EID_PEER_MGMT:
817 case WLAN_EID_PREQ:
818 case WLAN_EID_PREP:
819 case WLAN_EID_PERR:
820 case WLAN_EID_RANN:
821 case WLAN_EID_CHANNEL_SWITCH:
822 case WLAN_EID_EXT_CHANSWITCH_ANN:
823 case WLAN_EID_COUNTRY:
824 case WLAN_EID_PWR_CONSTRAINT:
825 case WLAN_EID_TIMEOUT_INTERVAL:
826 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
827 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
828 case WLAN_EID_CHAN_SWITCH_PARAM:
829 case WLAN_EID_EXT_CAPABILITY:
830 case WLAN_EID_CHAN_SWITCH_TIMING:
831 case WLAN_EID_LINK_ID:
832 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
833 /*
834 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
835 * that if the content gets bigger it might be needed more than once
836 */
837 if (test_bit(id, seen_elems)) {
838 elems->parse_error = true;
839 left -= elen;
840 pos += elen;
841 continue;
842 }
843 break;
844 }
845
846 if (calc_crc && id < 64 && (filter & (1ULL << id)))
847 crc = crc32_be(crc, pos - 2, elen + 2);
848
849 elem_parse_failed = false;
850
851 switch (id) {
852 case WLAN_EID_LINK_ID:
853 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
854 elem_parse_failed = true;
855 break;
856 }
857 elems->lnk_id = (void *)(pos - 2);
858 break;
859 case WLAN_EID_CHAN_SWITCH_TIMING:
860 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
861 elem_parse_failed = true;
862 break;
863 }
864 elems->ch_sw_timing = (void *)pos;
865 break;
866 case WLAN_EID_EXT_CAPABILITY:
867 elems->ext_capab = pos;
868 elems->ext_capab_len = elen;
869 break;
870 case WLAN_EID_SSID:
871 elems->ssid = pos;
872 elems->ssid_len = elen;
873 break;
874 case WLAN_EID_SUPP_RATES:
875 elems->supp_rates = pos;
876 elems->supp_rates_len = elen;
877 break;
878 case WLAN_EID_DS_PARAMS:
879 if (elen >= 1)
880 elems->ds_params = pos;
881 else
882 elem_parse_failed = true;
883 break;
884 case WLAN_EID_TIM:
885 if (elen >= sizeof(struct ieee80211_tim_ie)) {
886 elems->tim = (void *)pos;
887 elems->tim_len = elen;
888 } else
889 elem_parse_failed = true;
890 break;
891 case WLAN_EID_CHALLENGE:
892 elems->challenge = pos;
893 elems->challenge_len = elen;
894 break;
895 case WLAN_EID_VENDOR_SPECIFIC:
896 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
897 pos[2] == 0xf2) {
898 /* Microsoft OUI (00:50:F2) */
899
900 if (calc_crc)
901 crc = crc32_be(crc, pos - 2, elen + 2);
902
903 if (elen >= 5 && pos[3] == 2) {
904 /* OUI Type 2 - WMM IE */
905 if (pos[4] == 0) {
906 elems->wmm_info = pos;
907 elems->wmm_info_len = elen;
908 } else if (pos[4] == 1) {
909 elems->wmm_param = pos;
910 elems->wmm_param_len = elen;
911 }
912 }
913 }
914 break;
915 case WLAN_EID_RSN:
916 elems->rsn = pos;
917 elems->rsn_len = elen;
918 break;
919 case WLAN_EID_ERP_INFO:
920 if (elen >= 1)
921 elems->erp_info = pos;
922 else
923 elem_parse_failed = true;
924 break;
925 case WLAN_EID_EXT_SUPP_RATES:
926 elems->ext_supp_rates = pos;
927 elems->ext_supp_rates_len = elen;
928 break;
929 case WLAN_EID_HT_CAPABILITY:
930 if (elen >= sizeof(struct ieee80211_ht_cap))
931 elems->ht_cap_elem = (void *)pos;
932 else
933 elem_parse_failed = true;
934 break;
935 case WLAN_EID_HT_OPERATION:
936 if (elen >= sizeof(struct ieee80211_ht_operation))
937 elems->ht_operation = (void *)pos;
938 else
939 elem_parse_failed = true;
940 break;
941 case WLAN_EID_VHT_CAPABILITY:
942 if (elen >= sizeof(struct ieee80211_vht_cap))
943 elems->vht_cap_elem = (void *)pos;
944 else
945 elem_parse_failed = true;
946 break;
947 case WLAN_EID_VHT_OPERATION:
948 if (elen >= sizeof(struct ieee80211_vht_operation))
949 elems->vht_operation = (void *)pos;
950 else
951 elem_parse_failed = true;
952 break;
953 case WLAN_EID_OPMODE_NOTIF:
954 if (elen > 0)
955 elems->opmode_notif = pos;
956 else
957 elem_parse_failed = true;
958 break;
959 case WLAN_EID_MESH_ID:
960 elems->mesh_id = pos;
961 elems->mesh_id_len = elen;
962 break;
963 case WLAN_EID_MESH_CONFIG:
964 if (elen >= sizeof(struct ieee80211_meshconf_ie))
965 elems->mesh_config = (void *)pos;
966 else
967 elem_parse_failed = true;
968 break;
969 case WLAN_EID_PEER_MGMT:
970 elems->peering = pos;
971 elems->peering_len = elen;
972 break;
973 case WLAN_EID_MESH_AWAKE_WINDOW:
974 if (elen >= 2)
975 elems->awake_window = (void *)pos;
976 break;
977 case WLAN_EID_PREQ:
978 elems->preq = pos;
979 elems->preq_len = elen;
980 break;
981 case WLAN_EID_PREP:
982 elems->prep = pos;
983 elems->prep_len = elen;
984 break;
985 case WLAN_EID_PERR:
986 elems->perr = pos;
987 elems->perr_len = elen;
988 break;
989 case WLAN_EID_RANN:
990 if (elen >= sizeof(struct ieee80211_rann_ie))
991 elems->rann = (void *)pos;
992 else
993 elem_parse_failed = true;
994 break;
995 case WLAN_EID_CHANNEL_SWITCH:
996 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
997 elem_parse_failed = true;
998 break;
999 }
1000 elems->ch_switch_ie = (void *)pos;
1001 break;
1002 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004 elem_parse_failed = true;
1005 break;
1006 }
1007 elems->ext_chansw_ie = (void *)pos;
1008 break;
1009 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011 elem_parse_failed = true;
1012 break;
1013 }
1014 elems->sec_chan_offs = (void *)pos;
1015 break;
1016 case WLAN_EID_CHAN_SWITCH_PARAM:
1017 if (elen !=
1018 sizeof(*elems->mesh_chansw_params_ie)) {
1019 elem_parse_failed = true;
1020 break;
1021 }
1022 elems->mesh_chansw_params_ie = (void *)pos;
1023 break;
1024 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1025 if (!action ||
1026 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027 elem_parse_failed = true;
1028 break;
1029 }
1030 elems->wide_bw_chansw_ie = (void *)pos;
1031 break;
1032 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1033 if (action) {
1034 elem_parse_failed = true;
1035 break;
1036 }
1037 /*
1038 * This is a bit tricky, but as we only care about
1039 * the wide bandwidth channel switch element, so
1040 * just parse it out manually.
1041 */
1042 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1043 pos, elen);
1044 if (ie) {
1045 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046 elems->wide_bw_chansw_ie =
1047 (void *)(ie + 2);
1048 else
1049 elem_parse_failed = true;
1050 }
1051 break;
1052 case WLAN_EID_COUNTRY:
1053 elems->country_elem = pos;
1054 elems->country_elem_len = elen;
1055 break;
1056 case WLAN_EID_PWR_CONSTRAINT:
1057 if (elen != 1) {
1058 elem_parse_failed = true;
1059 break;
1060 }
1061 elems->pwr_constr_elem = pos;
1062 break;
1063 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064 /* Lots of different options exist, but we only care
1065 * about the Dynamic Transmit Power Control element.
1066 * First check for the Cisco OUI, then for the DTPC
1067 * tag (0x00).
1068 */
1069 if (elen < 4) {
1070 elem_parse_failed = true;
1071 break;
1072 }
1073
1074 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075 pos[2] != 0x96 || pos[3] != 0x00)
1076 break;
1077
1078 if (elen != 6) {
1079 elem_parse_failed = true;
1080 break;
1081 }
1082
1083 if (calc_crc)
1084 crc = crc32_be(crc, pos - 2, elen + 2);
1085
1086 elems->cisco_dtpc_elem = pos;
1087 break;
1088 case WLAN_EID_TIMEOUT_INTERVAL:
1089 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090 elems->timeout_int = (void *)pos;
1091 else
1092 elem_parse_failed = true;
1093 break;
1094 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1095 if (elen >= sizeof(*elems->max_idle_period_ie))
1096 elems->max_idle_period_ie = (void *)pos;
1097 break;
1098 default:
1099 break;
1100 }
1101
1102 if (elem_parse_failed)
1103 elems->parse_error = true;
1104 else
1105 __set_bit(id, seen_elems);
1106
1107 left -= elen;
1108 pos += elen;
1109 }
1110
1111 if (left != 0)
1112 elems->parse_error = true;
1113
1114 return crc;
1115}
1116
1117void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1118 struct ieee80211_tx_queue_params
1119 *qparam, int ac)
1120{
1121 struct ieee80211_chanctx_conf *chanctx_conf;
1122 const struct ieee80211_reg_rule *rrule;
1123 struct ieee80211_wmm_ac *wmm_ac;
1124 u16 center_freq = 0;
1125
1126 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1127 sdata->vif.type != NL80211_IFTYPE_STATION)
1128 return;
1129
1130 rcu_read_lock();
1131 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1132 if (chanctx_conf)
1133 center_freq = chanctx_conf->def.chan->center_freq;
1134
1135 if (!center_freq) {
1136 rcu_read_unlock();
1137 return;
1138 }
1139
1140 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1141
1142 if (IS_ERR_OR_NULL(rrule) || !rrule->wmm_rule) {
1143 rcu_read_unlock();
1144 return;
1145 }
1146
1147 if (sdata->vif.type == NL80211_IFTYPE_AP)
1148 wmm_ac = &rrule->wmm_rule->ap[ac];
1149 else
1150 wmm_ac = &rrule->wmm_rule->client[ac];
1151 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1152 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1153 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1154 qparam->txop = !qparam->txop ? wmm_ac->cot / 32 :
1155 min_t(u16, qparam->txop, wmm_ac->cot / 32);
1156 rcu_read_unlock();
1157}
1158
1159void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1160 bool bss_notify, bool enable_qos)
1161{
1162 struct ieee80211_local *local = sdata->local;
1163 struct ieee80211_tx_queue_params qparam;
1164 struct ieee80211_chanctx_conf *chanctx_conf;
1165 int ac;
1166 bool use_11b;
1167 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1168 int aCWmin, aCWmax;
1169
1170 if (!local->ops->conf_tx)
1171 return;
1172
1173 if (local->hw.queues < IEEE80211_NUM_ACS)
1174 return;
1175
1176 memset(&qparam, 0, sizeof(qparam));
1177
1178 rcu_read_lock();
1179 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1180 use_11b = (chanctx_conf &&
1181 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1182 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1183 rcu_read_unlock();
1184
1185 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1186
1187 /* Set defaults according to 802.11-2007 Table 7-37 */
1188 aCWmax = 1023;
1189 if (use_11b)
1190 aCWmin = 31;
1191 else
1192 aCWmin = 15;
1193
1194 /* Confiure old 802.11b/g medium access rules. */
1195 qparam.cw_max = aCWmax;
1196 qparam.cw_min = aCWmin;
1197 qparam.txop = 0;
1198 qparam.aifs = 2;
1199
1200 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1201 /* Update if QoS is enabled. */
1202 if (enable_qos) {
1203 switch (ac) {
1204 case IEEE80211_AC_BK:
1205 qparam.cw_max = aCWmax;
1206 qparam.cw_min = aCWmin;
1207 qparam.txop = 0;
1208 if (is_ocb)
1209 qparam.aifs = 9;
1210 else
1211 qparam.aifs = 7;
1212 break;
1213 /* never happens but let's not leave undefined */
1214 default:
1215 case IEEE80211_AC_BE:
1216 qparam.cw_max = aCWmax;
1217 qparam.cw_min = aCWmin;
1218 qparam.txop = 0;
1219 if (is_ocb)
1220 qparam.aifs = 6;
1221 else
1222 qparam.aifs = 3;
1223 break;
1224 case IEEE80211_AC_VI:
1225 qparam.cw_max = aCWmin;
1226 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1227 if (is_ocb)
1228 qparam.txop = 0;
1229 else if (use_11b)
1230 qparam.txop = 6016/32;
1231 else
1232 qparam.txop = 3008/32;
1233
1234 if (is_ocb)
1235 qparam.aifs = 3;
1236 else
1237 qparam.aifs = 2;
1238 break;
1239 case IEEE80211_AC_VO:
1240 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1241 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1242 if (is_ocb)
1243 qparam.txop = 0;
1244 else if (use_11b)
1245 qparam.txop = 3264/32;
1246 else
1247 qparam.txop = 1504/32;
1248 qparam.aifs = 2;
1249 break;
1250 }
1251 }
1252 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1253
1254 qparam.uapsd = false;
1255
1256 sdata->tx_conf[ac] = qparam;
1257 drv_conf_tx(local, sdata, ac, &qparam);
1258 }
1259
1260 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1261 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1262 sdata->vif.type != NL80211_IFTYPE_NAN) {
1263 sdata->vif.bss_conf.qos = enable_qos;
1264 if (bss_notify)
1265 ieee80211_bss_info_change_notify(sdata,
1266 BSS_CHANGED_QOS);
1267 }
1268}
1269
1270void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1271 u16 transaction, u16 auth_alg, u16 status,
1272 const u8 *extra, size_t extra_len, const u8 *da,
1273 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1274 u32 tx_flags)
1275{
1276 struct ieee80211_local *local = sdata->local;
1277 struct sk_buff *skb;
1278 struct ieee80211_mgmt *mgmt;
1279 int err;
1280
1281 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1282 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1283 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1284 if (!skb)
1285 return;
1286
1287 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1288
1289 mgmt = skb_put_zero(skb, 24 + 6);
1290 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1291 IEEE80211_STYPE_AUTH);
1292 memcpy(mgmt->da, da, ETH_ALEN);
1293 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1294 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1295 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1296 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1297 mgmt->u.auth.status_code = cpu_to_le16(status);
1298 if (extra)
1299 skb_put_data(skb, extra, extra_len);
1300
1301 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1302 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1303 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1304 WARN_ON(err);
1305 }
1306
1307 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1308 tx_flags;
1309 ieee80211_tx_skb(sdata, skb);
1310}
1311
1312void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1313 const u8 *bssid, u16 stype, u16 reason,
1314 bool send_frame, u8 *frame_buf)
1315{
1316 struct ieee80211_local *local = sdata->local;
1317 struct sk_buff *skb;
1318 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1319
1320 /* build frame */
1321 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1322 mgmt->duration = 0; /* initialize only */
1323 mgmt->seq_ctrl = 0; /* initialize only */
1324 memcpy(mgmt->da, bssid, ETH_ALEN);
1325 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1326 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1327 /* u.deauth.reason_code == u.disassoc.reason_code */
1328 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1329
1330 if (send_frame) {
1331 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1332 IEEE80211_DEAUTH_FRAME_LEN);
1333 if (!skb)
1334 return;
1335
1336 skb_reserve(skb, local->hw.extra_tx_headroom);
1337
1338 /* copy in frame */
1339 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1340
1341 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1342 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1343 IEEE80211_SKB_CB(skb)->flags |=
1344 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1345
1346 ieee80211_tx_skb(sdata, skb);
1347 }
1348}
1349
1350static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1351 u8 *buffer, size_t buffer_len,
1352 const u8 *ie, size_t ie_len,
1353 enum nl80211_band band,
1354 u32 rate_mask,
1355 struct cfg80211_chan_def *chandef,
1356 size_t *offset)
1357{
1358 struct ieee80211_supported_band *sband;
1359 u8 *pos = buffer, *end = buffer + buffer_len;
1360 size_t noffset;
1361 int supp_rates_len, i;
1362 u8 rates[32];
1363 int num_rates;
1364 int ext_rates_len;
1365 int shift;
1366 u32 rate_flags;
1367 bool have_80mhz = false;
1368
1369 *offset = 0;
1370
1371 sband = local->hw.wiphy->bands[band];
1372 if (WARN_ON_ONCE(!sband))
1373 return 0;
1374
1375 rate_flags = ieee80211_chandef_rate_flags(chandef);
1376 shift = ieee80211_chandef_get_shift(chandef);
1377
1378 num_rates = 0;
1379 for (i = 0; i < sband->n_bitrates; i++) {
1380 if ((BIT(i) & rate_mask) == 0)
1381 continue; /* skip rate */
1382 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1383 continue;
1384
1385 rates[num_rates++] =
1386 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1387 (1 << shift) * 5);
1388 }
1389
1390 supp_rates_len = min_t(int, num_rates, 8);
1391
1392 if (end - pos < 2 + supp_rates_len)
1393 goto out_err;
1394 *pos++ = WLAN_EID_SUPP_RATES;
1395 *pos++ = supp_rates_len;
1396 memcpy(pos, rates, supp_rates_len);
1397 pos += supp_rates_len;
1398
1399 /* insert "request information" if in custom IEs */
1400 if (ie && ie_len) {
1401 static const u8 before_extrates[] = {
1402 WLAN_EID_SSID,
1403 WLAN_EID_SUPP_RATES,
1404 WLAN_EID_REQUEST,
1405 };
1406 noffset = ieee80211_ie_split(ie, ie_len,
1407 before_extrates,
1408 ARRAY_SIZE(before_extrates),
1409 *offset);
1410 if (end - pos < noffset - *offset)
1411 goto out_err;
1412 memcpy(pos, ie + *offset, noffset - *offset);
1413 pos += noffset - *offset;
1414 *offset = noffset;
1415 }
1416
1417 ext_rates_len = num_rates - supp_rates_len;
1418 if (ext_rates_len > 0) {
1419 if (end - pos < 2 + ext_rates_len)
1420 goto out_err;
1421 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1422 *pos++ = ext_rates_len;
1423 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1424 pos += ext_rates_len;
1425 }
1426
1427 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1428 if (end - pos < 3)
1429 goto out_err;
1430 *pos++ = WLAN_EID_DS_PARAMS;
1431 *pos++ = 1;
1432 *pos++ = ieee80211_frequency_to_channel(
1433 chandef->chan->center_freq);
1434 }
1435
1436 /* insert custom IEs that go before HT */
1437 if (ie && ie_len) {
1438 static const u8 before_ht[] = {
1439 /*
1440 * no need to list the ones split off already
1441 * (or generated here)
1442 */
1443 WLAN_EID_DS_PARAMS,
1444 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1445 };
1446 noffset = ieee80211_ie_split(ie, ie_len,
1447 before_ht, ARRAY_SIZE(before_ht),
1448 *offset);
1449 if (end - pos < noffset - *offset)
1450 goto out_err;
1451 memcpy(pos, ie + *offset, noffset - *offset);
1452 pos += noffset - *offset;
1453 *offset = noffset;
1454 }
1455
1456 if (sband->ht_cap.ht_supported) {
1457 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1458 goto out_err;
1459 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1460 sband->ht_cap.cap);
1461 }
1462
1463 /*
1464 * If adding more here, adjust code in main.c
1465 * that calculates local->scan_ies_len.
1466 */
1467
1468 /* insert custom IEs that go before VHT */
1469 if (ie && ie_len) {
1470 static const u8 before_vht[] = {
1471 /*
1472 * no need to list the ones split off already
1473 * (or generated here)
1474 */
1475 WLAN_EID_BSS_COEX_2040,
1476 WLAN_EID_EXT_CAPABILITY,
1477 WLAN_EID_SSID_LIST,
1478 WLAN_EID_CHANNEL_USAGE,
1479 WLAN_EID_INTERWORKING,
1480 WLAN_EID_MESH_ID,
1481 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1482 };
1483 noffset = ieee80211_ie_split(ie, ie_len,
1484 before_vht, ARRAY_SIZE(before_vht),
1485 *offset);
1486 if (end - pos < noffset - *offset)
1487 goto out_err;
1488 memcpy(pos, ie + *offset, noffset - *offset);
1489 pos += noffset - *offset;
1490 *offset = noffset;
1491 }
1492
1493 /* Check if any channel in this sband supports at least 80 MHz */
1494 for (i = 0; i < sband->n_channels; i++) {
1495 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1496 IEEE80211_CHAN_NO_80MHZ))
1497 continue;
1498
1499 have_80mhz = true;
1500 break;
1501 }
1502
1503 if (sband->vht_cap.vht_supported && have_80mhz) {
1504 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1505 goto out_err;
1506 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1507 sband->vht_cap.cap);
1508 }
1509
1510 return pos - buffer;
1511 out_err:
1512 WARN_ONCE(1, "not enough space for preq IEs\n");
1513 return pos - buffer;
1514}
1515
1516int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1517 size_t buffer_len,
1518 struct ieee80211_scan_ies *ie_desc,
1519 const u8 *ie, size_t ie_len,
1520 u8 bands_used, u32 *rate_masks,
1521 struct cfg80211_chan_def *chandef)
1522{
1523 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1524 int i;
1525
1526 memset(ie_desc, 0, sizeof(*ie_desc));
1527
1528 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1529 if (bands_used & BIT(i)) {
1530 pos += ieee80211_build_preq_ies_band(local,
1531 buffer + pos,
1532 buffer_len - pos,
1533 ie, ie_len, i,
1534 rate_masks[i],
1535 chandef,
1536 &custom_ie_offset);
1537 ie_desc->ies[i] = buffer + old_pos;
1538 ie_desc->len[i] = pos - old_pos;
1539 old_pos = pos;
1540 }
1541 }
1542
1543 /* add any remaining custom IEs */
1544 if (ie && ie_len) {
1545 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1546 "not enough space for preq custom IEs\n"))
1547 return pos;
1548 memcpy(buffer + pos, ie + custom_ie_offset,
1549 ie_len - custom_ie_offset);
1550 ie_desc->common_ies = buffer + pos;
1551 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1552 pos += ie_len - custom_ie_offset;
1553 }
1554
1555 return pos;
1556};
1557
1558struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1559 const u8 *src, const u8 *dst,
1560 u32 ratemask,
1561 struct ieee80211_channel *chan,
1562 const u8 *ssid, size_t ssid_len,
1563 const u8 *ie, size_t ie_len,
1564 bool directed)
1565{
1566 struct ieee80211_local *local = sdata->local;
1567 struct cfg80211_chan_def chandef;
1568 struct sk_buff *skb;
1569 struct ieee80211_mgmt *mgmt;
1570 int ies_len;
1571 u32 rate_masks[NUM_NL80211_BANDS] = {};
1572 struct ieee80211_scan_ies dummy_ie_desc;
1573
1574 /*
1575 * Do not send DS Channel parameter for directed probe requests
1576 * in order to maximize the chance that we get a response. Some
1577 * badly-behaved APs don't respond when this parameter is included.
1578 */
1579 chandef.width = sdata->vif.bss_conf.chandef.width;
1580 if (directed)
1581 chandef.chan = NULL;
1582 else
1583 chandef.chan = chan;
1584
1585 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1586 100 + ie_len);
1587 if (!skb)
1588 return NULL;
1589
1590 rate_masks[chan->band] = ratemask;
1591 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1592 skb_tailroom(skb), &dummy_ie_desc,
1593 ie, ie_len, BIT(chan->band),
1594 rate_masks, &chandef);
1595 skb_put(skb, ies_len);
1596
1597 if (dst) {
1598 mgmt = (struct ieee80211_mgmt *) skb->data;
1599 memcpy(mgmt->da, dst, ETH_ALEN);
1600 memcpy(mgmt->bssid, dst, ETH_ALEN);
1601 }
1602
1603 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1604
1605 return skb;
1606}
1607
1608void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1609 const u8 *src, const u8 *dst,
1610 const u8 *ssid, size_t ssid_len,
1611 const u8 *ie, size_t ie_len,
1612 u32 ratemask, bool directed, u32 tx_flags,
1613 struct ieee80211_channel *channel, bool scan)
1614{
1615 struct sk_buff *skb;
1616
1617 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1618 ssid, ssid_len,
1619 ie, ie_len, directed);
1620 if (skb) {
1621 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1622 if (scan)
1623 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1624 else
1625 ieee80211_tx_skb(sdata, skb);
1626 }
1627}
1628
1629u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1630 struct ieee802_11_elems *elems,
1631 enum nl80211_band band, u32 *basic_rates)
1632{
1633 struct ieee80211_supported_band *sband;
1634 size_t num_rates;
1635 u32 supp_rates, rate_flags;
1636 int i, j, shift;
1637
1638 sband = sdata->local->hw.wiphy->bands[band];
1639 if (WARN_ON(!sband))
1640 return 1;
1641
1642 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1643 shift = ieee80211_vif_get_shift(&sdata->vif);
1644
1645 num_rates = sband->n_bitrates;
1646 supp_rates = 0;
1647 for (i = 0; i < elems->supp_rates_len +
1648 elems->ext_supp_rates_len; i++) {
1649 u8 rate = 0;
1650 int own_rate;
1651 bool is_basic;
1652 if (i < elems->supp_rates_len)
1653 rate = elems->supp_rates[i];
1654 else if (elems->ext_supp_rates)
1655 rate = elems->ext_supp_rates
1656 [i - elems->supp_rates_len];
1657 own_rate = 5 * (rate & 0x7f);
1658 is_basic = !!(rate & 0x80);
1659
1660 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1661 continue;
1662
1663 for (j = 0; j < num_rates; j++) {
1664 int brate;
1665 if ((rate_flags & sband->bitrates[j].flags)
1666 != rate_flags)
1667 continue;
1668
1669 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1670 1 << shift);
1671
1672 if (brate == own_rate) {
1673 supp_rates |= BIT(j);
1674 if (basic_rates && is_basic)
1675 *basic_rates |= BIT(j);
1676 }
1677 }
1678 }
1679 return supp_rates;
1680}
1681
1682void ieee80211_stop_device(struct ieee80211_local *local)
1683{
1684 ieee80211_led_radio(local, false);
1685 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1686
1687 cancel_work_sync(&local->reconfig_filter);
1688
1689 flush_workqueue(local->workqueue);
1690 drv_stop(local);
1691}
1692
1693static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1694 bool aborted)
1695{
1696 /* It's possible that we don't handle the scan completion in
1697 * time during suspend, so if it's still marked as completed
1698 * here, queue the work and flush it to clean things up.
1699 * Instead of calling the worker function directly here, we
1700 * really queue it to avoid potential races with other flows
1701 * scheduling the same work.
1702 */
1703 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1704 /* If coming from reconfiguration failure, abort the scan so
1705 * we don't attempt to continue a partial HW scan - which is
1706 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1707 * completed scan, and a 5 GHz portion is still pending.
1708 */
1709 if (aborted)
1710 set_bit(SCAN_ABORTED, &local->scanning);
1711 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1712 flush_delayed_work(&local->scan_work);
1713 }
1714}
1715
1716static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1717{
1718 struct ieee80211_sub_if_data *sdata;
1719 struct ieee80211_chanctx *ctx;
1720
1721 /*
1722 * We get here if during resume the device can't be restarted properly.
1723 * We might also get here if this happens during HW reset, which is a
1724 * slightly different situation and we need to drop all connections in
1725 * the latter case.
1726 *
1727 * Ask cfg80211 to turn off all interfaces, this will result in more
1728 * warnings but at least we'll then get into a clean stopped state.
1729 */
1730
1731 local->resuming = false;
1732 local->suspended = false;
1733 local->in_reconfig = false;
1734
1735 ieee80211_flush_completed_scan(local, true);
1736
1737 /* scheduled scan clearly can't be running any more, but tell
1738 * cfg80211 and clear local state
1739 */
1740 ieee80211_sched_scan_end(local);
1741
1742 list_for_each_entry(sdata, &local->interfaces, list)
1743 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1744
1745 /* Mark channel contexts as not being in the driver any more to avoid
1746 * removing them from the driver during the shutdown process...
1747 */
1748 mutex_lock(&local->chanctx_mtx);
1749 list_for_each_entry(ctx, &local->chanctx_list, list)
1750 ctx->driver_present = false;
1751 mutex_unlock(&local->chanctx_mtx);
1752
1753 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1754}
1755
1756static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1757 struct ieee80211_sub_if_data *sdata)
1758{
1759 struct ieee80211_chanctx_conf *conf;
1760 struct ieee80211_chanctx *ctx;
1761
1762 if (!local->use_chanctx)
1763 return;
1764
1765 mutex_lock(&local->chanctx_mtx);
1766 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1767 lockdep_is_held(&local->chanctx_mtx));
1768 if (conf) {
1769 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1770 drv_assign_vif_chanctx(local, sdata, ctx);
1771 }
1772 mutex_unlock(&local->chanctx_mtx);
1773}
1774
1775static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1776{
1777 struct ieee80211_local *local = sdata->local;
1778 struct sta_info *sta;
1779
1780 /* add STAs back */
1781 mutex_lock(&local->sta_mtx);
1782 list_for_each_entry(sta, &local->sta_list, list) {
1783 enum ieee80211_sta_state state;
1784
1785 if (!sta->uploaded || sta->sdata != sdata)
1786 continue;
1787
1788 for (state = IEEE80211_STA_NOTEXIST;
1789 state < sta->sta_state; state++)
1790 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1791 state + 1));
1792 }
1793 mutex_unlock(&local->sta_mtx);
1794}
1795
1796static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1797{
1798 struct cfg80211_nan_func *func, **funcs;
1799 int res, id, i = 0;
1800
1801 res = drv_start_nan(sdata->local, sdata,
1802 &sdata->u.nan.conf);
1803 if (WARN_ON(res))
1804 return res;
1805
1806 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1807 sizeof(*funcs), GFP_KERNEL);
1808 if (!funcs)
1809 return -ENOMEM;
1810
1811 /* Add all the functions:
1812 * This is a little bit ugly. We need to call a potentially sleeping
1813 * callback for each NAN function, so we can't hold the spinlock.
1814 */
1815 spin_lock_bh(&sdata->u.nan.func_lock);
1816
1817 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1818 funcs[i++] = func;
1819
1820 spin_unlock_bh(&sdata->u.nan.func_lock);
1821
1822 for (i = 0; funcs[i]; i++) {
1823 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1824 if (WARN_ON(res))
1825 ieee80211_nan_func_terminated(&sdata->vif,
1826 funcs[i]->instance_id,
1827 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1828 GFP_KERNEL);
1829 }
1830
1831 kfree(funcs);
1832
1833 return 0;
1834}
1835
1836int ieee80211_reconfig(struct ieee80211_local *local)
1837{
1838 struct ieee80211_hw *hw = &local->hw;
1839 struct ieee80211_sub_if_data *sdata;
1840 struct ieee80211_chanctx *ctx;
1841 struct sta_info *sta;
1842 int res, i;
1843 bool reconfig_due_to_wowlan = false;
1844 struct ieee80211_sub_if_data *sched_scan_sdata;
1845 struct cfg80211_sched_scan_request *sched_scan_req;
1846 bool sched_scan_stopped = false;
1847 bool suspended = local->suspended;
1848
1849 /* nothing to do if HW shouldn't run */
1850 if (!local->open_count)
1851 goto wake_up;
1852
1853#ifdef CONFIG_PM
1854 if (suspended)
1855 local->resuming = true;
1856
1857 if (local->wowlan) {
1858 /*
1859 * In the wowlan case, both mac80211 and the device
1860 * are functional when the resume op is called, so
1861 * clear local->suspended so the device could operate
1862 * normally (e.g. pass rx frames).
1863 */
1864 local->suspended = false;
1865 res = drv_resume(local);
1866 local->wowlan = false;
1867 if (res < 0) {
1868 local->resuming = false;
1869 return res;
1870 }
1871 if (res == 0)
1872 goto wake_up;
1873 WARN_ON(res > 1);
1874 /*
1875 * res is 1, which means the driver requested
1876 * to go through a regular reset on wakeup.
1877 * restore local->suspended in this case.
1878 */
1879 reconfig_due_to_wowlan = true;
1880 local->suspended = true;
1881 }
1882#endif
1883
1884 /*
1885 * In case of hw_restart during suspend (without wowlan),
1886 * cancel restart work, as we are reconfiguring the device
1887 * anyway.
1888 * Note that restart_work is scheduled on a frozen workqueue,
1889 * so we can't deadlock in this case.
1890 */
1891 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1892 cancel_work_sync(&local->restart_work);
1893
1894 local->started = false;
1895
1896 /*
1897 * Upon resume hardware can sometimes be goofy due to
1898 * various platform / driver / bus issues, so restarting
1899 * the device may at times not work immediately. Propagate
1900 * the error.
1901 */
1902 res = drv_start(local);
1903 if (res) {
1904 if (suspended)
1905 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1906 else
1907 WARN(1, "Hardware became unavailable during restart.\n");
1908 ieee80211_handle_reconfig_failure(local);
1909 return res;
1910 }
1911
1912 /* setup fragmentation threshold */
1913 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1914
1915 /* setup RTS threshold */
1916 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1917
1918 /* reset coverage class */
1919 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1920
1921 ieee80211_led_radio(local, true);
1922 ieee80211_mod_tpt_led_trig(local,
1923 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1924
1925 /* add interfaces */
1926 sdata = rtnl_dereference(local->monitor_sdata);
1927 if (sdata) {
1928 /* in HW restart it exists already */
1929 WARN_ON(local->resuming);
1930 res = drv_add_interface(local, sdata);
1931 if (WARN_ON(res)) {
1932 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1933 synchronize_net();
1934 kfree(sdata);
1935 }
1936 }
1937
1938 list_for_each_entry(sdata, &local->interfaces, list) {
1939 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1940 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1941 ieee80211_sdata_running(sdata)) {
1942 res = drv_add_interface(local, sdata);
1943 if (WARN_ON(res))
1944 break;
1945 }
1946 }
1947
1948 /* If adding any of the interfaces failed above, roll back and
1949 * report failure.
1950 */
1951 if (res) {
1952 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1953 list)
1954 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1955 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1956 ieee80211_sdata_running(sdata))
1957 drv_remove_interface(local, sdata);
1958 ieee80211_handle_reconfig_failure(local);
1959 return res;
1960 }
1961
1962 /* add channel contexts */
1963 if (local->use_chanctx) {
1964 mutex_lock(&local->chanctx_mtx);
1965 list_for_each_entry(ctx, &local->chanctx_list, list)
1966 if (ctx->replace_state !=
1967 IEEE80211_CHANCTX_REPLACES_OTHER)
1968 WARN_ON(drv_add_chanctx(local, ctx));
1969 mutex_unlock(&local->chanctx_mtx);
1970
1971 sdata = rtnl_dereference(local->monitor_sdata);
1972 if (sdata && ieee80211_sdata_running(sdata))
1973 ieee80211_assign_chanctx(local, sdata);
1974 }
1975
1976 /* reconfigure hardware */
1977 ieee80211_hw_config(local, ~0);
1978
1979 ieee80211_configure_filter(local);
1980
1981 /* Finally also reconfigure all the BSS information */
1982 list_for_each_entry(sdata, &local->interfaces, list) {
1983 u32 changed;
1984
1985 if (!ieee80211_sdata_running(sdata))
1986 continue;
1987
1988 ieee80211_assign_chanctx(local, sdata);
1989
1990 switch (sdata->vif.type) {
1991 case NL80211_IFTYPE_AP_VLAN:
1992 case NL80211_IFTYPE_MONITOR:
1993 break;
1994 default:
1995 ieee80211_reconfig_stations(sdata);
1996 /* fall through */
1997 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1998 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1999 drv_conf_tx(local, sdata, i,
2000 &sdata->tx_conf[i]);
2001 break;
2002 }
2003
2004 /* common change flags for all interface types */
2005 changed = BSS_CHANGED_ERP_CTS_PROT |
2006 BSS_CHANGED_ERP_PREAMBLE |
2007 BSS_CHANGED_ERP_SLOT |
2008 BSS_CHANGED_HT |
2009 BSS_CHANGED_BASIC_RATES |
2010 BSS_CHANGED_BEACON_INT |
2011 BSS_CHANGED_BSSID |
2012 BSS_CHANGED_CQM |
2013 BSS_CHANGED_QOS |
2014 BSS_CHANGED_IDLE |
2015 BSS_CHANGED_TXPOWER |
2016 BSS_CHANGED_MCAST_RATE;
2017
2018 if (sdata->vif.mu_mimo_owner)
2019 changed |= BSS_CHANGED_MU_GROUPS;
2020
2021 switch (sdata->vif.type) {
2022 case NL80211_IFTYPE_STATION:
2023 changed |= BSS_CHANGED_ASSOC |
2024 BSS_CHANGED_ARP_FILTER |
2025 BSS_CHANGED_PS;
2026
2027 /* Re-send beacon info report to the driver */
2028 if (sdata->u.mgd.have_beacon)
2029 changed |= BSS_CHANGED_BEACON_INFO;
2030
2031 if (sdata->vif.bss_conf.max_idle_period ||
2032 sdata->vif.bss_conf.protected_keep_alive)
2033 changed |= BSS_CHANGED_KEEP_ALIVE;
2034
2035 sdata_lock(sdata);
2036 ieee80211_bss_info_change_notify(sdata, changed);
2037 sdata_unlock(sdata);
2038 break;
2039 case NL80211_IFTYPE_OCB:
2040 changed |= BSS_CHANGED_OCB;
2041 ieee80211_bss_info_change_notify(sdata, changed);
2042 break;
2043 case NL80211_IFTYPE_ADHOC:
2044 changed |= BSS_CHANGED_IBSS;
2045 /* fall through */
2046 case NL80211_IFTYPE_AP:
2047 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2048
2049 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2050 changed |= BSS_CHANGED_AP_PROBE_RESP;
2051
2052 if (rcu_access_pointer(sdata->u.ap.beacon))
2053 drv_start_ap(local, sdata);
2054 }
2055
2056 /* fall through */
2057 case NL80211_IFTYPE_MESH_POINT:
2058 if (sdata->vif.bss_conf.enable_beacon) {
2059 changed |= BSS_CHANGED_BEACON |
2060 BSS_CHANGED_BEACON_ENABLED;
2061 ieee80211_bss_info_change_notify(sdata, changed);
2062 }
2063 break;
2064 case NL80211_IFTYPE_NAN:
2065 res = ieee80211_reconfig_nan(sdata);
2066 if (res < 0) {
2067 ieee80211_handle_reconfig_failure(local);
2068 return res;
2069 }
2070 break;
2071 case NL80211_IFTYPE_WDS:
2072 case NL80211_IFTYPE_AP_VLAN:
2073 case NL80211_IFTYPE_MONITOR:
2074 case NL80211_IFTYPE_P2P_DEVICE:
2075 /* nothing to do */
2076 break;
2077 case NL80211_IFTYPE_UNSPECIFIED:
2078 case NUM_NL80211_IFTYPES:
2079 case NL80211_IFTYPE_P2P_CLIENT:
2080 case NL80211_IFTYPE_P2P_GO:
2081 WARN_ON(1);
2082 break;
2083 }
2084 }
2085
2086 ieee80211_recalc_ps(local);
2087
2088 /*
2089 * The sta might be in psm against the ap (e.g. because
2090 * this was the state before a hw restart), so we
2091 * explicitly send a null packet in order to make sure
2092 * it'll sync against the ap (and get out of psm).
2093 */
2094 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2095 list_for_each_entry(sdata, &local->interfaces, list) {
2096 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2097 continue;
2098 if (!sdata->u.mgd.associated)
2099 continue;
2100
2101 ieee80211_send_nullfunc(local, sdata, false);
2102 }
2103 }
2104
2105 /* APs are now beaconing, add back stations */
2106 mutex_lock(&local->sta_mtx);
2107 list_for_each_entry(sta, &local->sta_list, list) {
2108 enum ieee80211_sta_state state;
2109
2110 if (!sta->uploaded)
2111 continue;
2112
2113 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2114 continue;
2115
2116 for (state = IEEE80211_STA_NOTEXIST;
2117 state < sta->sta_state; state++)
2118 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2119 state + 1));
2120 }
2121 mutex_unlock(&local->sta_mtx);
2122
2123 /* add back keys */
2124 list_for_each_entry(sdata, &local->interfaces, list)
2125 ieee80211_reset_crypto_tx_tailroom(sdata);
2126
2127 list_for_each_entry(sdata, &local->interfaces, list)
2128 if (ieee80211_sdata_running(sdata))
2129 ieee80211_enable_keys(sdata);
2130
2131 /* Reconfigure sched scan if it was interrupted by FW restart */
2132 mutex_lock(&local->mtx);
2133 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2134 lockdep_is_held(&local->mtx));
2135 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2136 lockdep_is_held(&local->mtx));
2137 if (sched_scan_sdata && sched_scan_req)
2138 /*
2139 * Sched scan stopped, but we don't want to report it. Instead,
2140 * we're trying to reschedule. However, if more than one scan
2141 * plan was set, we cannot reschedule since we don't know which
2142 * scan plan was currently running (and some scan plans may have
2143 * already finished).
2144 */
2145 if (sched_scan_req->n_scan_plans > 1 ||
2146 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2147 sched_scan_req)) {
2148 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2149 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2150 sched_scan_stopped = true;
2151 }
2152 mutex_unlock(&local->mtx);
2153
2154 if (sched_scan_stopped)
2155 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2156
2157 wake_up:
2158
2159 if (local->monitors == local->open_count && local->monitors > 0)
2160 ieee80211_add_virtual_monitor(local);
2161
2162 /*
2163 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2164 * sessions can be established after a resume.
2165 *
2166 * Also tear down aggregation sessions since reconfiguring
2167 * them in a hardware restart scenario is not easily done
2168 * right now, and the hardware will have lost information
2169 * about the sessions, but we and the AP still think they
2170 * are active. This is really a workaround though.
2171 */
2172 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2173 mutex_lock(&local->sta_mtx);
2174
2175 list_for_each_entry(sta, &local->sta_list, list) {
2176 if (!local->resuming)
2177 ieee80211_sta_tear_down_BA_sessions(
2178 sta, AGG_STOP_LOCAL_REQUEST);
2179 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2180 }
2181
2182 mutex_unlock(&local->sta_mtx);
2183 }
2184
2185 if (local->in_reconfig) {
2186 local->in_reconfig = false;
2187 barrier();
2188
2189 /* Restart deferred ROCs */
2190 mutex_lock(&local->mtx);
2191 ieee80211_start_next_roc(local);
2192 mutex_unlock(&local->mtx);
2193 }
2194
2195 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2196 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2197 false);
2198
2199 /*
2200 * If this is for hw restart things are still running.
2201 * We may want to change that later, however.
2202 */
2203 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2204 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2205
2206 if (!suspended)
2207 return 0;
2208
2209#ifdef CONFIG_PM
2210 /* first set suspended false, then resuming */
2211 local->suspended = false;
2212 mb();
2213 local->resuming = false;
2214
2215 ieee80211_flush_completed_scan(local, false);
2216
2217 if (local->open_count && !reconfig_due_to_wowlan)
2218 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2219
2220 list_for_each_entry(sdata, &local->interfaces, list) {
2221 if (!ieee80211_sdata_running(sdata))
2222 continue;
2223 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2224 ieee80211_sta_restart(sdata);
2225 }
2226
2227 mod_timer(&local->sta_cleanup, jiffies + 1);
2228#else
2229 WARN_ON(1);
2230#endif
2231
2232 return 0;
2233}
2234
2235void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2236{
2237 struct ieee80211_sub_if_data *sdata;
2238 struct ieee80211_local *local;
2239 struct ieee80211_key *key;
2240
2241 if (WARN_ON(!vif))
2242 return;
2243
2244 sdata = vif_to_sdata(vif);
2245 local = sdata->local;
2246
2247 if (WARN_ON(!local->resuming))
2248 return;
2249
2250 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2251 return;
2252
2253 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2254
2255 mutex_lock(&local->key_mtx);
2256 list_for_each_entry(key, &sdata->key_list, list)
2257 key->flags |= KEY_FLAG_TAINTED;
2258 mutex_unlock(&local->key_mtx);
2259}
2260EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2261
2262void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2263{
2264 struct ieee80211_local *local = sdata->local;
2265 struct ieee80211_chanctx_conf *chanctx_conf;
2266 struct ieee80211_chanctx *chanctx;
2267
2268 mutex_lock(&local->chanctx_mtx);
2269
2270 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2271 lockdep_is_held(&local->chanctx_mtx));
2272
2273 /*
2274 * This function can be called from a work, thus it may be possible
2275 * that the chanctx_conf is removed (due to a disconnection, for
2276 * example).
2277 * So nothing should be done in such case.
2278 */
2279 if (!chanctx_conf)
2280 goto unlock;
2281
2282 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2283 ieee80211_recalc_smps_chanctx(local, chanctx);
2284 unlock:
2285 mutex_unlock(&local->chanctx_mtx);
2286}
2287
2288void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2289{
2290 struct ieee80211_local *local = sdata->local;
2291 struct ieee80211_chanctx_conf *chanctx_conf;
2292 struct ieee80211_chanctx *chanctx;
2293
2294 mutex_lock(&local->chanctx_mtx);
2295
2296 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2297 lockdep_is_held(&local->chanctx_mtx));
2298
2299 if (WARN_ON_ONCE(!chanctx_conf))
2300 goto unlock;
2301
2302 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2303 ieee80211_recalc_chanctx_min_def(local, chanctx);
2304 unlock:
2305 mutex_unlock(&local->chanctx_mtx);
2306}
2307
2308size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2309{
2310 size_t pos = offset;
2311
2312 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2313 pos += 2 + ies[pos + 1];
2314
2315 return pos;
2316}
2317
2318static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2319 int rssi_min_thold,
2320 int rssi_max_thold)
2321{
2322 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2323
2324 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2325 return;
2326
2327 /*
2328 * Scale up threshold values before storing it, as the RSSI averaging
2329 * algorithm uses a scaled up value as well. Change this scaling
2330 * factor if the RSSI averaging algorithm changes.
2331 */
2332 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2333 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2334}
2335
2336void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2337 int rssi_min_thold,
2338 int rssi_max_thold)
2339{
2340 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2341
2342 WARN_ON(rssi_min_thold == rssi_max_thold ||
2343 rssi_min_thold > rssi_max_thold);
2344
2345 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2346 rssi_max_thold);
2347}
2348EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2349
2350void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2351{
2352 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2353
2354 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2355}
2356EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2357
2358u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2359 u16 cap)
2360{
2361 __le16 tmp;
2362
2363 *pos++ = WLAN_EID_HT_CAPABILITY;
2364 *pos++ = sizeof(struct ieee80211_ht_cap);
2365 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2366
2367 /* capability flags */
2368 tmp = cpu_to_le16(cap);
2369 memcpy(pos, &tmp, sizeof(u16));
2370 pos += sizeof(u16);
2371
2372 /* AMPDU parameters */
2373 *pos++ = ht_cap->ampdu_factor |
2374 (ht_cap->ampdu_density <<
2375 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2376
2377 /* MCS set */
2378 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2379 pos += sizeof(ht_cap->mcs);
2380
2381 /* extended capabilities */
2382 pos += sizeof(__le16);
2383
2384 /* BF capabilities */
2385 pos += sizeof(__le32);
2386
2387 /* antenna selection */
2388 pos += sizeof(u8);
2389
2390 return pos;
2391}
2392
2393u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2394 u32 cap)
2395{
2396 __le32 tmp;
2397
2398 *pos++ = WLAN_EID_VHT_CAPABILITY;
2399 *pos++ = sizeof(struct ieee80211_vht_cap);
2400 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2401
2402 /* capability flags */
2403 tmp = cpu_to_le32(cap);
2404 memcpy(pos, &tmp, sizeof(u32));
2405 pos += sizeof(u32);
2406
2407 /* VHT MCS set */
2408 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2409 pos += sizeof(vht_cap->vht_mcs);
2410
2411 return pos;
2412}
2413
2414u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2415 const struct cfg80211_chan_def *chandef,
2416 u16 prot_mode, bool rifs_mode)
2417{
2418 struct ieee80211_ht_operation *ht_oper;
2419 /* Build HT Information */
2420 *pos++ = WLAN_EID_HT_OPERATION;
2421 *pos++ = sizeof(struct ieee80211_ht_operation);
2422 ht_oper = (struct ieee80211_ht_operation *)pos;
2423 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2424 chandef->chan->center_freq);
2425 switch (chandef->width) {
2426 case NL80211_CHAN_WIDTH_160:
2427 case NL80211_CHAN_WIDTH_80P80:
2428 case NL80211_CHAN_WIDTH_80:
2429 case NL80211_CHAN_WIDTH_40:
2430 if (chandef->center_freq1 > chandef->chan->center_freq)
2431 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2432 else
2433 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2434 break;
2435 default:
2436 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2437 break;
2438 }
2439 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2440 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2441 chandef->width != NL80211_CHAN_WIDTH_20)
2442 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2443
2444 if (rifs_mode)
2445 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2446
2447 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2448 ht_oper->stbc_param = 0x0000;
2449
2450 /* It seems that Basic MCS set and Supported MCS set
2451 are identical for the first 10 bytes */
2452 memset(&ht_oper->basic_set, 0, 16);
2453 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2454
2455 return pos + sizeof(struct ieee80211_ht_operation);
2456}
2457
2458void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2459 const struct cfg80211_chan_def *chandef)
2460{
2461 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2462 *pos++ = 3; /* IE length */
2463 /* New channel width */
2464 switch (chandef->width) {
2465 case NL80211_CHAN_WIDTH_80:
2466 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2467 break;
2468 case NL80211_CHAN_WIDTH_160:
2469 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2470 break;
2471 case NL80211_CHAN_WIDTH_80P80:
2472 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2473 break;
2474 default:
2475 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2476 }
2477
2478 /* new center frequency segment 0 */
2479 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2480 /* new center frequency segment 1 */
2481 if (chandef->center_freq2)
2482 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2483 else
2484 *pos++ = 0;
2485}
2486
2487u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2488 const struct cfg80211_chan_def *chandef)
2489{
2490 struct ieee80211_vht_operation *vht_oper;
2491
2492 *pos++ = WLAN_EID_VHT_OPERATION;
2493 *pos++ = sizeof(struct ieee80211_vht_operation);
2494 vht_oper = (struct ieee80211_vht_operation *)pos;
2495 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2496 chandef->center_freq1);
2497 if (chandef->center_freq2)
2498 vht_oper->center_freq_seg1_idx =
2499 ieee80211_frequency_to_channel(chandef->center_freq2);
2500 else
2501 vht_oper->center_freq_seg1_idx = 0x00;
2502
2503 switch (chandef->width) {
2504 case NL80211_CHAN_WIDTH_160:
2505 /*
2506 * Convert 160 MHz channel width to new style as interop
2507 * workaround.
2508 */
2509 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2510 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2511 if (chandef->chan->center_freq < chandef->center_freq1)
2512 vht_oper->center_freq_seg0_idx -= 8;
2513 else
2514 vht_oper->center_freq_seg0_idx += 8;
2515 break;
2516 case NL80211_CHAN_WIDTH_80P80:
2517 /*
2518 * Convert 80+80 MHz channel width to new style as interop
2519 * workaround.
2520 */
2521 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2522 break;
2523 case NL80211_CHAN_WIDTH_80:
2524 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2525 break;
2526 default:
2527 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2528 break;
2529 }
2530
2531 /* don't require special VHT peer rates */
2532 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2533
2534 return pos + sizeof(struct ieee80211_vht_operation);
2535}
2536
2537bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2538 struct cfg80211_chan_def *chandef)
2539{
2540 enum nl80211_channel_type channel_type;
2541
2542 if (!ht_oper)
2543 return false;
2544
2545 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2546 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2547 channel_type = NL80211_CHAN_HT20;
2548 break;
2549 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2550 channel_type = NL80211_CHAN_HT40PLUS;
2551 break;
2552 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2553 channel_type = NL80211_CHAN_HT40MINUS;
2554 break;
2555 default:
2556 channel_type = NL80211_CHAN_NO_HT;
2557 return false;
2558 }
2559
2560 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2561 return true;
2562}
2563
2564bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2565 struct cfg80211_chan_def *chandef)
2566{
2567 struct cfg80211_chan_def new = *chandef;
2568 int cf1, cf2;
2569
2570 if (!oper)
2571 return false;
2572
2573 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2574 chandef->chan->band);
2575 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2576 chandef->chan->band);
2577
2578 switch (oper->chan_width) {
2579 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2580 break;
2581 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2582 new.width = NL80211_CHAN_WIDTH_80;
2583 new.center_freq1 = cf1;
2584 /* If needed, adjust based on the newer interop workaround. */
2585 if (oper->center_freq_seg1_idx) {
2586 unsigned int diff;
2587
2588 diff = abs(oper->center_freq_seg1_idx -
2589 oper->center_freq_seg0_idx);
2590 if (diff == 8) {
2591 new.width = NL80211_CHAN_WIDTH_160;
2592 new.center_freq1 = cf2;
2593 } else if (diff > 8) {
2594 new.width = NL80211_CHAN_WIDTH_80P80;
2595 new.center_freq2 = cf2;
2596 }
2597 }
2598 break;
2599 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2600 new.width = NL80211_CHAN_WIDTH_160;
2601 new.center_freq1 = cf1;
2602 break;
2603 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2604 new.width = NL80211_CHAN_WIDTH_80P80;
2605 new.center_freq1 = cf1;
2606 new.center_freq2 = cf2;
2607 break;
2608 default:
2609 return false;
2610 }
2611
2612 if (!cfg80211_chandef_valid(&new))
2613 return false;
2614
2615 *chandef = new;
2616 return true;
2617}
2618
2619int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2620 const struct ieee80211_supported_band *sband,
2621 const u8 *srates, int srates_len, u32 *rates)
2622{
2623 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2624 int shift = ieee80211_chandef_get_shift(chandef);
2625 struct ieee80211_rate *br;
2626 int brate, rate, i, j, count = 0;
2627
2628 *rates = 0;
2629
2630 for (i = 0; i < srates_len; i++) {
2631 rate = srates[i] & 0x7f;
2632
2633 for (j = 0; j < sband->n_bitrates; j++) {
2634 br = &sband->bitrates[j];
2635 if ((rate_flags & br->flags) != rate_flags)
2636 continue;
2637
2638 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2639 if (brate == rate) {
2640 *rates |= BIT(j);
2641 count++;
2642 break;
2643 }
2644 }
2645 }
2646 return count;
2647}
2648
2649int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2650 struct sk_buff *skb, bool need_basic,
2651 enum nl80211_band band)
2652{
2653 struct ieee80211_local *local = sdata->local;
2654 struct ieee80211_supported_band *sband;
2655 int rate, shift;
2656 u8 i, rates, *pos;
2657 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2658 u32 rate_flags;
2659
2660 shift = ieee80211_vif_get_shift(&sdata->vif);
2661 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2662 sband = local->hw.wiphy->bands[band];
2663 rates = 0;
2664 for (i = 0; i < sband->n_bitrates; i++) {
2665 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2666 continue;
2667 rates++;
2668 }
2669 if (rates > 8)
2670 rates = 8;
2671
2672 if (skb_tailroom(skb) < rates + 2)
2673 return -ENOMEM;
2674
2675 pos = skb_put(skb, rates + 2);
2676 *pos++ = WLAN_EID_SUPP_RATES;
2677 *pos++ = rates;
2678 for (i = 0; i < rates; i++) {
2679 u8 basic = 0;
2680 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2681 continue;
2682
2683 if (need_basic && basic_rates & BIT(i))
2684 basic = 0x80;
2685 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2686 5 * (1 << shift));
2687 *pos++ = basic | (u8) rate;
2688 }
2689
2690 return 0;
2691}
2692
2693int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2694 struct sk_buff *skb, bool need_basic,
2695 enum nl80211_band band)
2696{
2697 struct ieee80211_local *local = sdata->local;
2698 struct ieee80211_supported_band *sband;
2699 int rate, shift;
2700 u8 i, exrates, *pos;
2701 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2702 u32 rate_flags;
2703
2704 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2705 shift = ieee80211_vif_get_shift(&sdata->vif);
2706
2707 sband = local->hw.wiphy->bands[band];
2708 exrates = 0;
2709 for (i = 0; i < sband->n_bitrates; i++) {
2710 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2711 continue;
2712 exrates++;
2713 }
2714
2715 if (exrates > 8)
2716 exrates -= 8;
2717 else
2718 exrates = 0;
2719
2720 if (skb_tailroom(skb) < exrates + 2)
2721 return -ENOMEM;
2722
2723 if (exrates) {
2724 pos = skb_put(skb, exrates + 2);
2725 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2726 *pos++ = exrates;
2727 for (i = 8; i < sband->n_bitrates; i++) {
2728 u8 basic = 0;
2729 if ((rate_flags & sband->bitrates[i].flags)
2730 != rate_flags)
2731 continue;
2732 if (need_basic && basic_rates & BIT(i))
2733 basic = 0x80;
2734 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2735 5 * (1 << shift));
2736 *pos++ = basic | (u8) rate;
2737 }
2738 }
2739 return 0;
2740}
2741
2742int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2743{
2744 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2745 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2746
2747 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2748 /* non-managed type inferfaces */
2749 return 0;
2750 }
2751 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2752}
2753EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2754
2755u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2756{
2757 if (!mcs)
2758 return 1;
2759
2760 /* TODO: consider rx_highest */
2761
2762 if (mcs->rx_mask[3])
2763 return 4;
2764 if (mcs->rx_mask[2])
2765 return 3;
2766 if (mcs->rx_mask[1])
2767 return 2;
2768 return 1;
2769}
2770
2771/**
2772 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2773 * @local: mac80211 hw info struct
2774 * @status: RX status
2775 * @mpdu_len: total MPDU length (including FCS)
2776 * @mpdu_offset: offset into MPDU to calculate timestamp at
2777 *
2778 * This function calculates the RX timestamp at the given MPDU offset, taking
2779 * into account what the RX timestamp was. An offset of 0 will just normalize
2780 * the timestamp to TSF at beginning of MPDU reception.
2781 */
2782u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2783 struct ieee80211_rx_status *status,
2784 unsigned int mpdu_len,
2785 unsigned int mpdu_offset)
2786{
2787 u64 ts = status->mactime;
2788 struct rate_info ri;
2789 u16 rate;
2790
2791 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2792 return 0;
2793
2794 memset(&ri, 0, sizeof(ri));
2795
2796 /* Fill cfg80211 rate info */
2797 switch (status->encoding) {
2798 case RX_ENC_HT:
2799 ri.mcs = status->rate_idx;
2800 ri.flags |= RATE_INFO_FLAGS_MCS;
2801 ri.bw = status->bw;
2802 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2803 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2804 break;
2805 case RX_ENC_VHT:
2806 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2807 ri.mcs = status->rate_idx;
2808 ri.nss = status->nss;
2809 ri.bw = status->bw;
2810 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2811 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2812 break;
2813 default:
2814 WARN_ON(1);
2815 /* fall through */
2816 case RX_ENC_LEGACY: {
2817 struct ieee80211_supported_band *sband;
2818 int shift = 0;
2819 int bitrate;
2820
2821 ri.bw = status->bw;
2822
2823 switch (status->bw) {
2824 case RATE_INFO_BW_10:
2825 shift = 1;
2826 break;
2827 case RATE_INFO_BW_5:
2828 shift = 2;
2829 break;
2830 }
2831
2832 sband = local->hw.wiphy->bands[status->band];
2833 bitrate = sband->bitrates[status->rate_idx].bitrate;
2834 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2835
2836 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2837 /* TODO: handle HT/VHT preambles */
2838 if (status->band == NL80211_BAND_5GHZ) {
2839 ts += 20 << shift;
2840 mpdu_offset += 2;
2841 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2842 ts += 96;
2843 } else {
2844 ts += 192;
2845 }
2846 }
2847 break;
2848 }
2849 }
2850
2851 rate = cfg80211_calculate_bitrate(&ri);
2852 if (WARN_ONCE(!rate,
2853 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2854 (unsigned long long)status->flag, status->rate_idx,
2855 status->nss))
2856 return 0;
2857
2858 /* rewind from end of MPDU */
2859 if (status->flag & RX_FLAG_MACTIME_END)
2860 ts -= mpdu_len * 8 * 10 / rate;
2861
2862 ts += mpdu_offset * 8 * 10 / rate;
2863
2864 return ts;
2865}
2866
2867void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2868{
2869 struct ieee80211_sub_if_data *sdata;
2870 struct cfg80211_chan_def chandef;
2871
2872 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2873 ASSERT_RTNL();
2874
2875 mutex_lock(&local->mtx);
2876 list_for_each_entry(sdata, &local->interfaces, list) {
2877 /* it might be waiting for the local->mtx, but then
2878 * by the time it gets it, sdata->wdev.cac_started
2879 * will no longer be true
2880 */
2881 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2882
2883 if (sdata->wdev.cac_started) {
2884 chandef = sdata->vif.bss_conf.chandef;
2885 ieee80211_vif_release_channel(sdata);
2886 cfg80211_cac_event(sdata->dev,
2887 &chandef,
2888 NL80211_RADAR_CAC_ABORTED,
2889 GFP_KERNEL);
2890 }
2891 }
2892 mutex_unlock(&local->mtx);
2893}
2894
2895void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2896{
2897 struct ieee80211_local *local =
2898 container_of(work, struct ieee80211_local, radar_detected_work);
2899 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2900 struct ieee80211_chanctx *ctx;
2901 int num_chanctx = 0;
2902
2903 mutex_lock(&local->chanctx_mtx);
2904 list_for_each_entry(ctx, &local->chanctx_list, list) {
2905 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2906 continue;
2907
2908 num_chanctx++;
2909 chandef = ctx->conf.def;
2910 }
2911 mutex_unlock(&local->chanctx_mtx);
2912
2913 rtnl_lock();
2914 ieee80211_dfs_cac_cancel(local);
2915 rtnl_unlock();
2916
2917 if (num_chanctx > 1)
2918 /* XXX: multi-channel is not supported yet */
2919 WARN_ON(1);
2920 else
2921 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2922}
2923
2924void ieee80211_radar_detected(struct ieee80211_hw *hw)
2925{
2926 struct ieee80211_local *local = hw_to_local(hw);
2927
2928 trace_api_radar_detected(local);
2929
2930 schedule_work(&local->radar_detected_work);
2931}
2932EXPORT_SYMBOL(ieee80211_radar_detected);
2933
2934u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2935{
2936 u32 ret;
2937 int tmp;
2938
2939 switch (c->width) {
2940 case NL80211_CHAN_WIDTH_20:
2941 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2942 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2943 break;
2944 case NL80211_CHAN_WIDTH_40:
2945 c->width = NL80211_CHAN_WIDTH_20;
2946 c->center_freq1 = c->chan->center_freq;
2947 ret = IEEE80211_STA_DISABLE_40MHZ |
2948 IEEE80211_STA_DISABLE_VHT;
2949 break;
2950 case NL80211_CHAN_WIDTH_80:
2951 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2952 /* n_P40 */
2953 tmp /= 2;
2954 /* freq_P40 */
2955 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2956 c->width = NL80211_CHAN_WIDTH_40;
2957 ret = IEEE80211_STA_DISABLE_VHT;
2958 break;
2959 case NL80211_CHAN_WIDTH_80P80:
2960 c->center_freq2 = 0;
2961 c->width = NL80211_CHAN_WIDTH_80;
2962 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2963 IEEE80211_STA_DISABLE_160MHZ;
2964 break;
2965 case NL80211_CHAN_WIDTH_160:
2966 /* n_P20 */
2967 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2968 /* n_P80 */
2969 tmp /= 4;
2970 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2971 c->width = NL80211_CHAN_WIDTH_80;
2972 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2973 IEEE80211_STA_DISABLE_160MHZ;
2974 break;
2975 default:
2976 case NL80211_CHAN_WIDTH_20_NOHT:
2977 WARN_ON_ONCE(1);
2978 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2979 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2980 break;
2981 case NL80211_CHAN_WIDTH_5:
2982 case NL80211_CHAN_WIDTH_10:
2983 WARN_ON_ONCE(1);
2984 /* keep c->width */
2985 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2986 break;
2987 }
2988
2989 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2990
2991 return ret;
2992}
2993
2994/*
2995 * Returns true if smps_mode_new is strictly more restrictive than
2996 * smps_mode_old.
2997 */
2998bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2999 enum ieee80211_smps_mode smps_mode_new)
3000{
3001 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3002 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3003 return false;
3004
3005 switch (smps_mode_old) {
3006 case IEEE80211_SMPS_STATIC:
3007 return false;
3008 case IEEE80211_SMPS_DYNAMIC:
3009 return smps_mode_new == IEEE80211_SMPS_STATIC;
3010 case IEEE80211_SMPS_OFF:
3011 return smps_mode_new != IEEE80211_SMPS_OFF;
3012 default:
3013 WARN_ON(1);
3014 }
3015
3016 return false;
3017}
3018
3019int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3020 struct cfg80211_csa_settings *csa_settings)
3021{
3022 struct sk_buff *skb;
3023 struct ieee80211_mgmt *mgmt;
3024 struct ieee80211_local *local = sdata->local;
3025 int freq;
3026 int hdr_len = offsetofend(struct ieee80211_mgmt,
3027 u.action.u.chan_switch);
3028 u8 *pos;
3029
3030 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3031 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3032 return -EOPNOTSUPP;
3033
3034 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3035 5 + /* channel switch announcement element */
3036 3 + /* secondary channel offset element */
3037 5 + /* wide bandwidth channel switch announcement */
3038 8); /* mesh channel switch parameters element */
3039 if (!skb)
3040 return -ENOMEM;
3041
3042 skb_reserve(skb, local->tx_headroom);
3043 mgmt = skb_put_zero(skb, hdr_len);
3044 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3045 IEEE80211_STYPE_ACTION);
3046
3047 eth_broadcast_addr(mgmt->da);
3048 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3049 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3050 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3051 } else {
3052 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3053 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3054 }
3055 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3056 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3057 pos = skb_put(skb, 5);
3058 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3059 *pos++ = 3; /* IE length */
3060 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3061 freq = csa_settings->chandef.chan->center_freq;
3062 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3063 *pos++ = csa_settings->count; /* count */
3064
3065 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3066 enum nl80211_channel_type ch_type;
3067
3068 skb_put(skb, 3);
3069 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3070 *pos++ = 1; /* IE length */
3071 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3072 if (ch_type == NL80211_CHAN_HT40PLUS)
3073 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3074 else
3075 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3076 }
3077
3078 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3079 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3080
3081 skb_put(skb, 8);
3082 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3083 *pos++ = 6; /* IE length */
3084 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3085 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3086 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3087 *pos++ |= csa_settings->block_tx ?
3088 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3089 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3090 pos += 2;
3091 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3092 pos += 2;
3093 }
3094
3095 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3096 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3097 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3098 skb_put(skb, 5);
3099 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3100 }
3101
3102 ieee80211_tx_skb(sdata, skb);
3103 return 0;
3104}
3105
3106bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3107{
3108 return !(cs == NULL || cs->cipher == 0 ||
3109 cs->hdr_len < cs->pn_len + cs->pn_off ||
3110 cs->hdr_len <= cs->key_idx_off ||
3111 cs->key_idx_shift > 7 ||
3112 cs->key_idx_mask == 0);
3113}
3114
3115bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3116{
3117 int i;
3118
3119 /* Ensure we have enough iftype bitmap space for all iftype values */
3120 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3121
3122 for (i = 0; i < n; i++)
3123 if (!ieee80211_cs_valid(&cs[i]))
3124 return false;
3125
3126 return true;
3127}
3128
3129const struct ieee80211_cipher_scheme *
3130ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3131 enum nl80211_iftype iftype)
3132{
3133 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3134 int n = local->hw.n_cipher_schemes;
3135 int i;
3136 const struct ieee80211_cipher_scheme *cs = NULL;
3137
3138 for (i = 0; i < n; i++) {
3139 if (l[i].cipher == cipher) {
3140 cs = &l[i];
3141 break;
3142 }
3143 }
3144
3145 if (!cs || !(cs->iftype & BIT(iftype)))
3146 return NULL;
3147
3148 return cs;
3149}
3150
3151int ieee80211_cs_headroom(struct ieee80211_local *local,
3152 struct cfg80211_crypto_settings *crypto,
3153 enum nl80211_iftype iftype)
3154{
3155 const struct ieee80211_cipher_scheme *cs;
3156 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3157 int i;
3158
3159 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3160 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3161 iftype);
3162
3163 if (cs && headroom < cs->hdr_len)
3164 headroom = cs->hdr_len;
3165 }
3166
3167 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3168 if (cs && headroom < cs->hdr_len)
3169 headroom = cs->hdr_len;
3170
3171 return headroom;
3172}
3173
3174static bool
3175ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3176{
3177 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3178 int skip;
3179
3180 if (end > 0)
3181 return false;
3182
3183 /* One shot NOA */
3184 if (data->count[i] == 1)
3185 return false;
3186
3187 if (data->desc[i].interval == 0)
3188 return false;
3189
3190 /* End time is in the past, check for repetitions */
3191 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3192 if (data->count[i] < 255) {
3193 if (data->count[i] <= skip) {
3194 data->count[i] = 0;
3195 return false;
3196 }
3197
3198 data->count[i] -= skip;
3199 }
3200
3201 data->desc[i].start += skip * data->desc[i].interval;
3202
3203 return true;
3204}
3205
3206static bool
3207ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3208 s32 *offset)
3209{
3210 bool ret = false;
3211 int i;
3212
3213 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3214 s32 cur;
3215
3216 if (!data->count[i])
3217 continue;
3218
3219 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3220 ret = true;
3221
3222 cur = data->desc[i].start - tsf;
3223 if (cur > *offset)
3224 continue;
3225
3226 cur = data->desc[i].start + data->desc[i].duration - tsf;
3227 if (cur > *offset)
3228 *offset = cur;
3229 }
3230
3231 return ret;
3232}
3233
3234static u32
3235ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3236{
3237 s32 offset = 0;
3238 int tries = 0;
3239 /*
3240 * arbitrary limit, used to avoid infinite loops when combined NoA
3241 * descriptors cover the full time period.
3242 */
3243 int max_tries = 5;
3244
3245 ieee80211_extend_absent_time(data, tsf, &offset);
3246 do {
3247 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3248 break;
3249
3250 tries++;
3251 } while (tries < max_tries);
3252
3253 return offset;
3254}
3255
3256void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3257{
3258 u32 next_offset = BIT(31) - 1;
3259 int i;
3260
3261 data->absent = 0;
3262 data->has_next_tsf = false;
3263 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3264 s32 start;
3265
3266 if (!data->count[i])
3267 continue;
3268
3269 ieee80211_extend_noa_desc(data, tsf, i);
3270 start = data->desc[i].start - tsf;
3271 if (start <= 0)
3272 data->absent |= BIT(i);
3273
3274 if (next_offset > start)
3275 next_offset = start;
3276
3277 data->has_next_tsf = true;
3278 }
3279
3280 if (data->absent)
3281 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3282
3283 data->next_tsf = tsf + next_offset;
3284}
3285EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3286
3287int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3288 struct ieee80211_noa_data *data, u32 tsf)
3289{
3290 int ret = 0;
3291 int i;
3292
3293 memset(data, 0, sizeof(*data));
3294
3295 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3296 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3297
3298 if (!desc->count || !desc->duration)
3299 continue;
3300
3301 data->count[i] = desc->count;
3302 data->desc[i].start = le32_to_cpu(desc->start_time);
3303 data->desc[i].duration = le32_to_cpu(desc->duration);
3304 data->desc[i].interval = le32_to_cpu(desc->interval);
3305
3306 if (data->count[i] > 1 &&
3307 data->desc[i].interval < data->desc[i].duration)
3308 continue;
3309
3310 ieee80211_extend_noa_desc(data, tsf, i);
3311 ret++;
3312 }
3313
3314 if (ret)
3315 ieee80211_update_p2p_noa(data, tsf);
3316
3317 return ret;
3318}
3319EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3320
3321void ieee80211_recalc_dtim(struct ieee80211_local *local,
3322 struct ieee80211_sub_if_data *sdata)
3323{
3324 u64 tsf = drv_get_tsf(local, sdata);
3325 u64 dtim_count = 0;
3326 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3327 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3328 struct ps_data *ps;
3329 u8 bcns_from_dtim;
3330
3331 if (tsf == -1ULL || !beacon_int || !dtim_period)
3332 return;
3333
3334 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3335 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3336 if (!sdata->bss)
3337 return;
3338
3339 ps = &sdata->bss->ps;
3340 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3341 ps = &sdata->u.mesh.ps;
3342 } else {
3343 return;
3344 }
3345
3346 /*
3347 * actually finds last dtim_count, mac80211 will update in
3348 * __beacon_add_tim().
3349 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3350 */
3351 do_div(tsf, beacon_int);
3352 bcns_from_dtim = do_div(tsf, dtim_period);
3353 /* just had a DTIM */
3354 if (!bcns_from_dtim)
3355 dtim_count = 0;
3356 else
3357 dtim_count = dtim_period - bcns_from_dtim;
3358
3359 ps->dtim_count = dtim_count;
3360}
3361
3362static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3363 struct ieee80211_chanctx *ctx)
3364{
3365 struct ieee80211_sub_if_data *sdata;
3366 u8 radar_detect = 0;
3367
3368 lockdep_assert_held(&local->chanctx_mtx);
3369
3370 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3371 return 0;
3372
3373 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3374 if (sdata->reserved_radar_required)
3375 radar_detect |= BIT(sdata->reserved_chandef.width);
3376
3377 /*
3378 * An in-place reservation context should not have any assigned vifs
3379 * until it replaces the other context.
3380 */
3381 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3382 !list_empty(&ctx->assigned_vifs));
3383
3384 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3385 if (sdata->radar_required)
3386 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3387
3388 return radar_detect;
3389}
3390
3391int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3392 const struct cfg80211_chan_def *chandef,
3393 enum ieee80211_chanctx_mode chanmode,
3394 u8 radar_detect)
3395{
3396 struct ieee80211_local *local = sdata->local;
3397 struct ieee80211_sub_if_data *sdata_iter;
3398 enum nl80211_iftype iftype = sdata->wdev.iftype;
3399 struct ieee80211_chanctx *ctx;
3400 int total = 1;
3401 struct iface_combination_params params = {
3402 .radar_detect = radar_detect,
3403 };
3404
3405 lockdep_assert_held(&local->chanctx_mtx);
3406
3407 if (WARN_ON(hweight32(radar_detect) > 1))
3408 return -EINVAL;
3409
3410 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3411 !chandef->chan))
3412 return -EINVAL;
3413
3414 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3415 return -EINVAL;
3416
3417 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3418 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3419 /*
3420 * always passing this is harmless, since it'll be the
3421 * same value that cfg80211 finds if it finds the same
3422 * interface ... and that's always allowed
3423 */
3424 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3425 }
3426
3427 /* Always allow software iftypes */
3428 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3429 if (radar_detect)
3430 return -EINVAL;
3431 return 0;
3432 }
3433
3434 if (chandef)
3435 params.num_different_channels = 1;
3436
3437 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3438 params.iftype_num[iftype] = 1;
3439
3440 list_for_each_entry(ctx, &local->chanctx_list, list) {
3441 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3442 continue;
3443 params.radar_detect |=
3444 ieee80211_chanctx_radar_detect(local, ctx);
3445 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3446 params.num_different_channels++;
3447 continue;
3448 }
3449 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3450 cfg80211_chandef_compatible(chandef,
3451 &ctx->conf.def))
3452 continue;
3453 params.num_different_channels++;
3454 }
3455
3456 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3457 struct wireless_dev *wdev_iter;
3458
3459 wdev_iter = &sdata_iter->wdev;
3460
3461 if (sdata_iter == sdata ||
3462 !ieee80211_sdata_running(sdata_iter) ||
3463 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3464 continue;
3465
3466 params.iftype_num[wdev_iter->iftype]++;
3467 total++;
3468 }
3469
3470 if (total == 1 && !params.radar_detect)
3471 return 0;
3472
3473 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3474}
3475
3476static void
3477ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3478 void *data)
3479{
3480 u32 *max_num_different_channels = data;
3481
3482 *max_num_different_channels = max(*max_num_different_channels,
3483 c->num_different_channels);
3484}
3485
3486int ieee80211_max_num_channels(struct ieee80211_local *local)
3487{
3488 struct ieee80211_sub_if_data *sdata;
3489 struct ieee80211_chanctx *ctx;
3490 u32 max_num_different_channels = 1;
3491 int err;
3492 struct iface_combination_params params = {0};
3493
3494 lockdep_assert_held(&local->chanctx_mtx);
3495
3496 list_for_each_entry(ctx, &local->chanctx_list, list) {
3497 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3498 continue;
3499
3500 params.num_different_channels++;
3501
3502 params.radar_detect |=
3503 ieee80211_chanctx_radar_detect(local, ctx);
3504 }
3505
3506 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3507 params.iftype_num[sdata->wdev.iftype]++;
3508
3509 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3510 ieee80211_iter_max_chans,
3511 &max_num_different_channels);
3512 if (err < 0)
3513 return err;
3514
3515 return max_num_different_channels;
3516}
3517
3518u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3519{
3520 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3521 *buf++ = 7; /* len */
3522 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3523 *buf++ = 0x50;
3524 *buf++ = 0xf2;
3525 *buf++ = 2; /* WME */
3526 *buf++ = 0; /* WME info */
3527 *buf++ = 1; /* WME ver */
3528 *buf++ = qosinfo; /* U-APSD no in use */
3529
3530 return buf;
3531}
3532
3533void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3534 unsigned long *frame_cnt,
3535 unsigned long *byte_cnt)
3536{
3537 struct txq_info *txqi = to_txq_info(txq);
3538 u32 frag_cnt = 0, frag_bytes = 0;
3539 struct sk_buff *skb;
3540
3541 skb_queue_walk(&txqi->frags, skb) {
3542 frag_cnt++;
3543 frag_bytes += skb->len;
3544 }
3545
3546 if (frame_cnt)
3547 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3548
3549 if (byte_cnt)
3550 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3551}
3552EXPORT_SYMBOL(ieee80211_txq_get_depth);
3553
3554const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3555 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3556 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3557 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3558 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3559};