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Merge tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
[linux/fpc-iii.git] / net / mac80211 / util.c
blob8d3ae6b2f95ff47d8478b0831cee735c740460d1
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) 2018-2020 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 */
37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39 struct 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 }
46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
47
48 u8 *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 }
98 EXPORT_SYMBOL(ieee80211_get_bssid);
99
100 void 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
111 int 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 }
204 EXPORT_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 }
247 EXPORT_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 }
289 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
290
291 static 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;
348 out:
349 spin_unlock(&fq->lock);
350 local_bh_enable();
351 }
352
353 static 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
389 void 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
400 void 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
433 static 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
485 void 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
497 void 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 }
503 EXPORT_SYMBOL(ieee80211_wake_queue);
504
505 static 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
552 void 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
564 void 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 }
570 EXPORT_SYMBOL(ieee80211_stop_queue);
571
572 void 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
594 void 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
627 void 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
644 void 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 }
650 EXPORT_SYMBOL(ieee80211_stop_queues);
651
652 int 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 }
667 EXPORT_SYMBOL(ieee80211_queue_stopped);
668
669 void 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
686 void 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 }
692 EXPORT_SYMBOL(ieee80211_wake_queues);
693
694 static unsigned int
695 ieee80211_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
717 void __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
742 void 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
748 void 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
757 void 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
766 static 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
806 void 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 }
818 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
819
820 void 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 }
833 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
834
835 void ieee80211_iterate_active_interfaces_rtnl(
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 ASSERT_RTNL();
844
845 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
846 iterator, data);
847 }
848 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
849
850 static 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
865 void 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 }
876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
877
878 struct 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 }
887 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
888
889 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
890 {
891 struct ieee80211_sub_if_data *sdata;
892
893 if (!vif)
894 return NULL;
895
896 sdata = vif_to_sdata(vif);
897
898 if (!ieee80211_sdata_running(sdata) ||
899 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
900 return NULL;
901
902 return &sdata->wdev;
903 }
904 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
905
906 /*
907 * Nothing should have been stuffed into the workqueue during
908 * the suspend->resume cycle. Since we can't check each caller
909 * of this function if we are already quiescing / suspended,
910 * check here and don't WARN since this can actually happen when
911 * the rx path (for example) is racing against __ieee80211_suspend
912 * and suspending / quiescing was set after the rx path checked
913 * them.
914 */
915 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
916 {
917 if (local->quiescing || (local->suspended && !local->resuming)) {
918 pr_warn("queueing ieee80211 work while going to suspend\n");
919 return false;
920 }
921
922 return true;
923 }
924
925 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
926 {
927 struct ieee80211_local *local = hw_to_local(hw);
928
929 if (!ieee80211_can_queue_work(local))
930 return;
931
932 queue_work(local->workqueue, work);
933 }
934 EXPORT_SYMBOL(ieee80211_queue_work);
935
936 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
937 struct delayed_work *dwork,
938 unsigned long delay)
939 {
940 struct ieee80211_local *local = hw_to_local(hw);
941
942 if (!ieee80211_can_queue_work(local))
943 return;
944
945 queue_delayed_work(local->workqueue, dwork, delay);
946 }
947 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
948
949 static void ieee80211_parse_extension_element(u32 *crc,
950 const struct element *elem,
951 struct ieee802_11_elems *elems)
952 {
953 const void *data = elem->data + 1;
954 u8 len = elem->datalen - 1;
955
956 switch (elem->data[0]) {
957 case WLAN_EID_EXT_HE_MU_EDCA:
958 if (len == sizeof(*elems->mu_edca_param_set)) {
959 elems->mu_edca_param_set = data;
960 if (crc)
961 *crc = crc32_be(*crc, (void *)elem,
962 elem->datalen + 2);
963 }
964 break;
965 case WLAN_EID_EXT_HE_CAPABILITY:
966 elems->he_cap = data;
967 elems->he_cap_len = len;
968 break;
969 case WLAN_EID_EXT_HE_OPERATION:
970 if (len >= sizeof(*elems->he_operation) &&
971 len == ieee80211_he_oper_size(data) - 1) {
972 if (crc)
973 *crc = crc32_be(*crc, (void *)elem,
974 elem->datalen + 2);
975 elems->he_operation = data;
976 }
977 break;
978 case WLAN_EID_EXT_UORA:
979 if (len == 1)
980 elems->uora_element = data;
981 break;
982 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
983 if (len == 3)
984 elems->max_channel_switch_time = data;
985 break;
986 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
987 if (len == sizeof(*elems->mbssid_config_ie))
988 elems->mbssid_config_ie = data;
989 break;
990 case WLAN_EID_EXT_HE_SPR:
991 if (len >= sizeof(*elems->he_spr) &&
992 len >= ieee80211_he_spr_size(data))
993 elems->he_spr = data;
994 break;
995 case WLAN_EID_EXT_HE_6GHZ_CAPA:
996 if (len == sizeof(*elems->he_6ghz_capa))
997 elems->he_6ghz_capa = data;
998 break;
999 }
1000 }
1001
1002 static u32
1003 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1004 struct ieee802_11_elems *elems,
1005 u64 filter, u32 crc,
1006 const struct element *check_inherit)
1007 {
1008 const struct element *elem;
1009 bool calc_crc = filter != 0;
1010 DECLARE_BITMAP(seen_elems, 256);
1011 const u8 *ie;
1012
1013 bitmap_zero(seen_elems, 256);
1014
1015 for_each_element(elem, start, len) {
1016 bool elem_parse_failed;
1017 u8 id = elem->id;
1018 u8 elen = elem->datalen;
1019 const u8 *pos = elem->data;
1020
1021 if (check_inherit &&
1022 !cfg80211_is_element_inherited(elem,
1023 check_inherit))
1024 continue;
1025
1026 switch (id) {
1027 case WLAN_EID_SSID:
1028 case WLAN_EID_SUPP_RATES:
1029 case WLAN_EID_FH_PARAMS:
1030 case WLAN_EID_DS_PARAMS:
1031 case WLAN_EID_CF_PARAMS:
1032 case WLAN_EID_TIM:
1033 case WLAN_EID_IBSS_PARAMS:
1034 case WLAN_EID_CHALLENGE:
1035 case WLAN_EID_RSN:
1036 case WLAN_EID_ERP_INFO:
1037 case WLAN_EID_EXT_SUPP_RATES:
1038 case WLAN_EID_HT_CAPABILITY:
1039 case WLAN_EID_HT_OPERATION:
1040 case WLAN_EID_VHT_CAPABILITY:
1041 case WLAN_EID_VHT_OPERATION:
1042 case WLAN_EID_MESH_ID:
1043 case WLAN_EID_MESH_CONFIG:
1044 case WLAN_EID_PEER_MGMT:
1045 case WLAN_EID_PREQ:
1046 case WLAN_EID_PREP:
1047 case WLAN_EID_PERR:
1048 case WLAN_EID_RANN:
1049 case WLAN_EID_CHANNEL_SWITCH:
1050 case WLAN_EID_EXT_CHANSWITCH_ANN:
1051 case WLAN_EID_COUNTRY:
1052 case WLAN_EID_PWR_CONSTRAINT:
1053 case WLAN_EID_TIMEOUT_INTERVAL:
1054 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1055 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1056 case WLAN_EID_CHAN_SWITCH_PARAM:
1057 case WLAN_EID_EXT_CAPABILITY:
1058 case WLAN_EID_CHAN_SWITCH_TIMING:
1059 case WLAN_EID_LINK_ID:
1060 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1061 case WLAN_EID_RSNX:
1062 case WLAN_EID_S1G_BCN_COMPAT:
1063 case WLAN_EID_S1G_CAPABILITIES:
1064 case WLAN_EID_S1G_OPERATION:
1065 case WLAN_EID_AID_RESPONSE:
1066 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1067 /*
1068 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1069 * that if the content gets bigger it might be needed more than once
1070 */
1071 if (test_bit(id, seen_elems)) {
1072 elems->parse_error = true;
1073 continue;
1074 }
1075 break;
1076 }
1077
1078 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1079 crc = crc32_be(crc, pos - 2, elen + 2);
1080
1081 elem_parse_failed = false;
1082
1083 switch (id) {
1084 case WLAN_EID_LINK_ID:
1085 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1086 elem_parse_failed = true;
1087 break;
1088 }
1089 elems->lnk_id = (void *)(pos - 2);
1090 break;
1091 case WLAN_EID_CHAN_SWITCH_TIMING:
1092 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1093 elem_parse_failed = true;
1094 break;
1095 }
1096 elems->ch_sw_timing = (void *)pos;
1097 break;
1098 case WLAN_EID_EXT_CAPABILITY:
1099 elems->ext_capab = pos;
1100 elems->ext_capab_len = elen;
1101 break;
1102 case WLAN_EID_SSID:
1103 elems->ssid = pos;
1104 elems->ssid_len = elen;
1105 break;
1106 case WLAN_EID_SUPP_RATES:
1107 elems->supp_rates = pos;
1108 elems->supp_rates_len = elen;
1109 break;
1110 case WLAN_EID_DS_PARAMS:
1111 if (elen >= 1)
1112 elems->ds_params = pos;
1113 else
1114 elem_parse_failed = true;
1115 break;
1116 case WLAN_EID_TIM:
1117 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1118 elems->tim = (void *)pos;
1119 elems->tim_len = elen;
1120 } else
1121 elem_parse_failed = true;
1122 break;
1123 case WLAN_EID_CHALLENGE:
1124 elems->challenge = pos;
1125 elems->challenge_len = elen;
1126 break;
1127 case WLAN_EID_VENDOR_SPECIFIC:
1128 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1129 pos[2] == 0xf2) {
1130 /* Microsoft OUI (00:50:F2) */
1131
1132 if (calc_crc)
1133 crc = crc32_be(crc, pos - 2, elen + 2);
1134
1135 if (elen >= 5 && pos[3] == 2) {
1136 /* OUI Type 2 - WMM IE */
1137 if (pos[4] == 0) {
1138 elems->wmm_info = pos;
1139 elems->wmm_info_len = elen;
1140 } else if (pos[4] == 1) {
1141 elems->wmm_param = pos;
1142 elems->wmm_param_len = elen;
1143 }
1144 }
1145 }
1146 break;
1147 case WLAN_EID_RSN:
1148 elems->rsn = pos;
1149 elems->rsn_len = elen;
1150 break;
1151 case WLAN_EID_ERP_INFO:
1152 if (elen >= 1)
1153 elems->erp_info = pos;
1154 else
1155 elem_parse_failed = true;
1156 break;
1157 case WLAN_EID_EXT_SUPP_RATES:
1158 elems->ext_supp_rates = pos;
1159 elems->ext_supp_rates_len = elen;
1160 break;
1161 case WLAN_EID_HT_CAPABILITY:
1162 if (elen >= sizeof(struct ieee80211_ht_cap))
1163 elems->ht_cap_elem = (void *)pos;
1164 else
1165 elem_parse_failed = true;
1166 break;
1167 case WLAN_EID_HT_OPERATION:
1168 if (elen >= sizeof(struct ieee80211_ht_operation))
1169 elems->ht_operation = (void *)pos;
1170 else
1171 elem_parse_failed = true;
1172 break;
1173 case WLAN_EID_VHT_CAPABILITY:
1174 if (elen >= sizeof(struct ieee80211_vht_cap))
1175 elems->vht_cap_elem = (void *)pos;
1176 else
1177 elem_parse_failed = true;
1178 break;
1179 case WLAN_EID_VHT_OPERATION:
1180 if (elen >= sizeof(struct ieee80211_vht_operation)) {
1181 elems->vht_operation = (void *)pos;
1182 if (calc_crc)
1183 crc = crc32_be(crc, pos - 2, elen + 2);
1184 break;
1185 }
1186 elem_parse_failed = true;
1187 break;
1188 case WLAN_EID_OPMODE_NOTIF:
1189 if (elen > 0) {
1190 elems->opmode_notif = pos;
1191 if (calc_crc)
1192 crc = crc32_be(crc, pos - 2, elen + 2);
1193 break;
1194 }
1195 elem_parse_failed = true;
1196 break;
1197 case WLAN_EID_MESH_ID:
1198 elems->mesh_id = pos;
1199 elems->mesh_id_len = elen;
1200 break;
1201 case WLAN_EID_MESH_CONFIG:
1202 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1203 elems->mesh_config = (void *)pos;
1204 else
1205 elem_parse_failed = true;
1206 break;
1207 case WLAN_EID_PEER_MGMT:
1208 elems->peering = pos;
1209 elems->peering_len = elen;
1210 break;
1211 case WLAN_EID_MESH_AWAKE_WINDOW:
1212 if (elen >= 2)
1213 elems->awake_window = (void *)pos;
1214 break;
1215 case WLAN_EID_PREQ:
1216 elems->preq = pos;
1217 elems->preq_len = elen;
1218 break;
1219 case WLAN_EID_PREP:
1220 elems->prep = pos;
1221 elems->prep_len = elen;
1222 break;
1223 case WLAN_EID_PERR:
1224 elems->perr = pos;
1225 elems->perr_len = elen;
1226 break;
1227 case WLAN_EID_RANN:
1228 if (elen >= sizeof(struct ieee80211_rann_ie))
1229 elems->rann = (void *)pos;
1230 else
1231 elem_parse_failed = true;
1232 break;
1233 case WLAN_EID_CHANNEL_SWITCH:
1234 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1235 elem_parse_failed = true;
1236 break;
1237 }
1238 elems->ch_switch_ie = (void *)pos;
1239 break;
1240 case WLAN_EID_EXT_CHANSWITCH_ANN:
1241 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1242 elem_parse_failed = true;
1243 break;
1244 }
1245 elems->ext_chansw_ie = (void *)pos;
1246 break;
1247 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1248 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1249 elem_parse_failed = true;
1250 break;
1251 }
1252 elems->sec_chan_offs = (void *)pos;
1253 break;
1254 case WLAN_EID_CHAN_SWITCH_PARAM:
1255 if (elen !=
1256 sizeof(*elems->mesh_chansw_params_ie)) {
1257 elem_parse_failed = true;
1258 break;
1259 }
1260 elems->mesh_chansw_params_ie = (void *)pos;
1261 break;
1262 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1263 if (!action ||
1264 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1265 elem_parse_failed = true;
1266 break;
1267 }
1268 elems->wide_bw_chansw_ie = (void *)pos;
1269 break;
1270 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1271 if (action) {
1272 elem_parse_failed = true;
1273 break;
1274 }
1275 /*
1276 * This is a bit tricky, but as we only care about
1277 * the wide bandwidth channel switch element, so
1278 * just parse it out manually.
1279 */
1280 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1281 pos, elen);
1282 if (ie) {
1283 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1284 elems->wide_bw_chansw_ie =
1285 (void *)(ie + 2);
1286 else
1287 elem_parse_failed = true;
1288 }
1289 break;
1290 case WLAN_EID_COUNTRY:
1291 elems->country_elem = pos;
1292 elems->country_elem_len = elen;
1293 break;
1294 case WLAN_EID_PWR_CONSTRAINT:
1295 if (elen != 1) {
1296 elem_parse_failed = true;
1297 break;
1298 }
1299 elems->pwr_constr_elem = pos;
1300 break;
1301 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1302 /* Lots of different options exist, but we only care
1303 * about the Dynamic Transmit Power Control element.
1304 * First check for the Cisco OUI, then for the DTPC
1305 * tag (0x00).
1306 */
1307 if (elen < 4) {
1308 elem_parse_failed = true;
1309 break;
1310 }
1311
1312 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1313 pos[2] != 0x96 || pos[3] != 0x00)
1314 break;
1315
1316 if (elen != 6) {
1317 elem_parse_failed = true;
1318 break;
1319 }
1320
1321 if (calc_crc)
1322 crc = crc32_be(crc, pos - 2, elen + 2);
1323
1324 elems->cisco_dtpc_elem = pos;
1325 break;
1326 case WLAN_EID_ADDBA_EXT:
1327 if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1328 elem_parse_failed = true;
1329 break;
1330 }
1331 elems->addba_ext_ie = (void *)pos;
1332 break;
1333 case WLAN_EID_TIMEOUT_INTERVAL:
1334 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1335 elems->timeout_int = (void *)pos;
1336 else
1337 elem_parse_failed = true;
1338 break;
1339 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1340 if (elen >= sizeof(*elems->max_idle_period_ie))
1341 elems->max_idle_period_ie = (void *)pos;
1342 break;
1343 case WLAN_EID_RSNX:
1344 elems->rsnx = pos;
1345 elems->rsnx_len = elen;
1346 break;
1347 case WLAN_EID_EXTENSION:
1348 ieee80211_parse_extension_element(calc_crc ?
1349 &crc : NULL,
1350 elem, elems);
1351 break;
1352 case WLAN_EID_S1G_CAPABILITIES:
1353 if (elen == sizeof(*elems->s1g_capab))
1354 elems->s1g_capab = (void *)pos;
1355 else
1356 elem_parse_failed = true;
1357 break;
1358 case WLAN_EID_S1G_OPERATION:
1359 if (elen == sizeof(*elems->s1g_oper))
1360 elems->s1g_oper = (void *)pos;
1361 else
1362 elem_parse_failed = true;
1363 break;
1364 case WLAN_EID_S1G_BCN_COMPAT:
1365 if (elen == sizeof(*elems->s1g_bcn_compat))
1366 elems->s1g_bcn_compat = (void *)pos;
1367 else
1368 elem_parse_failed = true;
1369 break;
1370 case WLAN_EID_AID_RESPONSE:
1371 if (elen == sizeof(struct ieee80211_aid_response_ie))
1372 elems->aid_resp = (void *)pos;
1373 else
1374 elem_parse_failed = true;
1375 break;
1376 default:
1377 break;
1378 }
1379
1380 if (elem_parse_failed)
1381 elems->parse_error = true;
1382 else
1383 __set_bit(id, seen_elems);
1384 }
1385
1386 if (!for_each_element_completed(elem, start, len))
1387 elems->parse_error = true;
1388
1389 return crc;
1390 }
1391
1392 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1393 struct ieee802_11_elems *elems,
1394 u8 *transmitter_bssid,
1395 u8 *bss_bssid,
1396 u8 *nontransmitted_profile)
1397 {
1398 const struct element *elem, *sub;
1399 size_t profile_len = 0;
1400 bool found = false;
1401
1402 if (!bss_bssid || !transmitter_bssid)
1403 return profile_len;
1404
1405 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1406 if (elem->datalen < 2)
1407 continue;
1408
1409 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1410 u8 new_bssid[ETH_ALEN];
1411 const u8 *index;
1412
1413 if (sub->id != 0 || sub->datalen < 4) {
1414 /* not a valid BSS profile */
1415 continue;
1416 }
1417
1418 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1419 sub->data[1] != 2) {
1420 /* The first element of the
1421 * Nontransmitted BSSID Profile is not
1422 * the Nontransmitted BSSID Capability
1423 * element.
1424 */
1425 continue;
1426 }
1427
1428 memset(nontransmitted_profile, 0, len);
1429 profile_len = cfg80211_merge_profile(start, len,
1430 elem,
1431 sub,
1432 nontransmitted_profile,
1433 len);
1434
1435 /* found a Nontransmitted BSSID Profile */
1436 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1437 nontransmitted_profile,
1438 profile_len);
1439 if (!index || index[1] < 1 || index[2] == 0) {
1440 /* Invalid MBSSID Index element */
1441 continue;
1442 }
1443
1444 cfg80211_gen_new_bssid(transmitter_bssid,
1445 elem->data[0],
1446 index[2],
1447 new_bssid);
1448 if (ether_addr_equal(new_bssid, bss_bssid)) {
1449 found = true;
1450 elems->bssid_index_len = index[1];
1451 elems->bssid_index = (void *)&index[2];
1452 break;
1453 }
1454 }
1455 }
1456
1457 return found ? profile_len : 0;
1458 }
1459
1460 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1461 struct ieee802_11_elems *elems,
1462 u64 filter, u32 crc, u8 *transmitter_bssid,
1463 u8 *bss_bssid)
1464 {
1465 const struct element *non_inherit = NULL;
1466 u8 *nontransmitted_profile;
1467 int nontransmitted_profile_len = 0;
1468
1469 memset(elems, 0, sizeof(*elems));
1470 elems->ie_start = start;
1471 elems->total_len = len;
1472
1473 nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1474 if (nontransmitted_profile) {
1475 nontransmitted_profile_len =
1476 ieee802_11_find_bssid_profile(start, len, elems,
1477 transmitter_bssid,
1478 bss_bssid,
1479 nontransmitted_profile);
1480 non_inherit =
1481 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1482 nontransmitted_profile,
1483 nontransmitted_profile_len);
1484 }
1485
1486 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1487 crc, non_inherit);
1488
1489 /* Override with nontransmitted profile, if found */
1490 if (nontransmitted_profile_len)
1491 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1492 nontransmitted_profile_len,
1493 action, elems, 0, 0, NULL);
1494
1495 if (elems->tim && !elems->parse_error) {
1496 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1497
1498 elems->dtim_period = tim_ie->dtim_period;
1499 elems->dtim_count = tim_ie->dtim_count;
1500 }
1501
1502 /* Override DTIM period and count if needed */
1503 if (elems->bssid_index &&
1504 elems->bssid_index_len >=
1505 offsetofend(struct ieee80211_bssid_index, dtim_period))
1506 elems->dtim_period = elems->bssid_index->dtim_period;
1507
1508 if (elems->bssid_index &&
1509 elems->bssid_index_len >=
1510 offsetofend(struct ieee80211_bssid_index, dtim_count))
1511 elems->dtim_count = elems->bssid_index->dtim_count;
1512
1513 kfree(nontransmitted_profile);
1514
1515 return crc;
1516 }
1517
1518 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1519 struct ieee80211_tx_queue_params
1520 *qparam, int ac)
1521 {
1522 struct ieee80211_chanctx_conf *chanctx_conf;
1523 const struct ieee80211_reg_rule *rrule;
1524 const struct ieee80211_wmm_ac *wmm_ac;
1525 u16 center_freq = 0;
1526
1527 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1528 sdata->vif.type != NL80211_IFTYPE_STATION)
1529 return;
1530
1531 rcu_read_lock();
1532 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1533 if (chanctx_conf)
1534 center_freq = chanctx_conf->def.chan->center_freq;
1535
1536 if (!center_freq) {
1537 rcu_read_unlock();
1538 return;
1539 }
1540
1541 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1542
1543 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1544 rcu_read_unlock();
1545 return;
1546 }
1547
1548 if (sdata->vif.type == NL80211_IFTYPE_AP)
1549 wmm_ac = &rrule->wmm_rule.ap[ac];
1550 else
1551 wmm_ac = &rrule->wmm_rule.client[ac];
1552 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1553 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1554 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1555 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1556 rcu_read_unlock();
1557 }
1558
1559 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1560 bool bss_notify, bool enable_qos)
1561 {
1562 struct ieee80211_local *local = sdata->local;
1563 struct ieee80211_tx_queue_params qparam;
1564 struct ieee80211_chanctx_conf *chanctx_conf;
1565 int ac;
1566 bool use_11b;
1567 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1568 int aCWmin, aCWmax;
1569
1570 if (!local->ops->conf_tx)
1571 return;
1572
1573 if (local->hw.queues < IEEE80211_NUM_ACS)
1574 return;
1575
1576 memset(&qparam, 0, sizeof(qparam));
1577
1578 rcu_read_lock();
1579 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1580 use_11b = (chanctx_conf &&
1581 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1582 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1583 rcu_read_unlock();
1584
1585 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1586
1587 /* Set defaults according to 802.11-2007 Table 7-37 */
1588 aCWmax = 1023;
1589 if (use_11b)
1590 aCWmin = 31;
1591 else
1592 aCWmin = 15;
1593
1594 /* Confiure old 802.11b/g medium access rules. */
1595 qparam.cw_max = aCWmax;
1596 qparam.cw_min = aCWmin;
1597 qparam.txop = 0;
1598 qparam.aifs = 2;
1599
1600 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1601 /* Update if QoS is enabled. */
1602 if (enable_qos) {
1603 switch (ac) {
1604 case IEEE80211_AC_BK:
1605 qparam.cw_max = aCWmax;
1606 qparam.cw_min = aCWmin;
1607 qparam.txop = 0;
1608 if (is_ocb)
1609 qparam.aifs = 9;
1610 else
1611 qparam.aifs = 7;
1612 break;
1613 /* never happens but let's not leave undefined */
1614 default:
1615 case IEEE80211_AC_BE:
1616 qparam.cw_max = aCWmax;
1617 qparam.cw_min = aCWmin;
1618 qparam.txop = 0;
1619 if (is_ocb)
1620 qparam.aifs = 6;
1621 else
1622 qparam.aifs = 3;
1623 break;
1624 case IEEE80211_AC_VI:
1625 qparam.cw_max = aCWmin;
1626 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1627 if (is_ocb)
1628 qparam.txop = 0;
1629 else if (use_11b)
1630 qparam.txop = 6016/32;
1631 else
1632 qparam.txop = 3008/32;
1633
1634 if (is_ocb)
1635 qparam.aifs = 3;
1636 else
1637 qparam.aifs = 2;
1638 break;
1639 case IEEE80211_AC_VO:
1640 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1641 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1642 if (is_ocb)
1643 qparam.txop = 0;
1644 else if (use_11b)
1645 qparam.txop = 3264/32;
1646 else
1647 qparam.txop = 1504/32;
1648 qparam.aifs = 2;
1649 break;
1650 }
1651 }
1652 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1653
1654 qparam.uapsd = false;
1655
1656 sdata->tx_conf[ac] = qparam;
1657 drv_conf_tx(local, sdata, ac, &qparam);
1658 }
1659
1660 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1661 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1662 sdata->vif.type != NL80211_IFTYPE_NAN) {
1663 sdata->vif.bss_conf.qos = enable_qos;
1664 if (bss_notify)
1665 ieee80211_bss_info_change_notify(sdata,
1666 BSS_CHANGED_QOS);
1667 }
1668 }
1669
1670 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1671 u16 transaction, u16 auth_alg, u16 status,
1672 const u8 *extra, size_t extra_len, const u8 *da,
1673 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1674 u32 tx_flags)
1675 {
1676 struct ieee80211_local *local = sdata->local;
1677 struct sk_buff *skb;
1678 struct ieee80211_mgmt *mgmt;
1679 int err;
1680
1681 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1682 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1683 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1684 if (!skb)
1685 return;
1686
1687 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1688
1689 mgmt = skb_put_zero(skb, 24 + 6);
1690 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1691 IEEE80211_STYPE_AUTH);
1692 memcpy(mgmt->da, da, ETH_ALEN);
1693 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1694 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1695 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1696 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1697 mgmt->u.auth.status_code = cpu_to_le16(status);
1698 if (extra)
1699 skb_put_data(skb, extra, extra_len);
1700
1701 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1702 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1703 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1704 WARN_ON(err);
1705 }
1706
1707 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1708 tx_flags;
1709 ieee80211_tx_skb(sdata, skb);
1710 }
1711
1712 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1713 const u8 *da, const u8 *bssid,
1714 u16 stype, u16 reason,
1715 bool send_frame, u8 *frame_buf)
1716 {
1717 struct ieee80211_local *local = sdata->local;
1718 struct sk_buff *skb;
1719 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1720
1721 /* build frame */
1722 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1723 mgmt->duration = 0; /* initialize only */
1724 mgmt->seq_ctrl = 0; /* initialize only */
1725 memcpy(mgmt->da, da, ETH_ALEN);
1726 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1727 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1728 /* u.deauth.reason_code == u.disassoc.reason_code */
1729 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1730
1731 if (send_frame) {
1732 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1733 IEEE80211_DEAUTH_FRAME_LEN);
1734 if (!skb)
1735 return;
1736
1737 skb_reserve(skb, local->hw.extra_tx_headroom);
1738
1739 /* copy in frame */
1740 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1741
1742 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1743 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1744 IEEE80211_SKB_CB(skb)->flags |=
1745 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1746
1747 ieee80211_tx_skb(sdata, skb);
1748 }
1749 }
1750
1751 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1752 {
1753 if ((end - pos) < 5)
1754 return pos;
1755
1756 *pos++ = WLAN_EID_EXTENSION;
1757 *pos++ = 1 + sizeof(cap);
1758 *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1759 memcpy(pos, &cap, sizeof(cap));
1760
1761 return pos + 2;
1762 }
1763
1764 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1765 u8 *buffer, size_t buffer_len,
1766 const u8 *ie, size_t ie_len,
1767 enum nl80211_band band,
1768 u32 rate_mask,
1769 struct cfg80211_chan_def *chandef,
1770 size_t *offset, u32 flags)
1771 {
1772 struct ieee80211_local *local = sdata->local;
1773 struct ieee80211_supported_band *sband;
1774 const struct ieee80211_sta_he_cap *he_cap;
1775 u8 *pos = buffer, *end = buffer + buffer_len;
1776 size_t noffset;
1777 int supp_rates_len, i;
1778 u8 rates[32];
1779 int num_rates;
1780 int ext_rates_len;
1781 int shift;
1782 u32 rate_flags;
1783 bool have_80mhz = false;
1784
1785 *offset = 0;
1786
1787 sband = local->hw.wiphy->bands[band];
1788 if (WARN_ON_ONCE(!sband))
1789 return 0;
1790
1791 rate_flags = ieee80211_chandef_rate_flags(chandef);
1792 shift = ieee80211_chandef_get_shift(chandef);
1793
1794 num_rates = 0;
1795 for (i = 0; i < sband->n_bitrates; i++) {
1796 if ((BIT(i) & rate_mask) == 0)
1797 continue; /* skip rate */
1798 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1799 continue;
1800
1801 rates[num_rates++] =
1802 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1803 (1 << shift) * 5);
1804 }
1805
1806 supp_rates_len = min_t(int, num_rates, 8);
1807
1808 if (end - pos < 2 + supp_rates_len)
1809 goto out_err;
1810 *pos++ = WLAN_EID_SUPP_RATES;
1811 *pos++ = supp_rates_len;
1812 memcpy(pos, rates, supp_rates_len);
1813 pos += supp_rates_len;
1814
1815 /* insert "request information" if in custom IEs */
1816 if (ie && ie_len) {
1817 static const u8 before_extrates[] = {
1818 WLAN_EID_SSID,
1819 WLAN_EID_SUPP_RATES,
1820 WLAN_EID_REQUEST,
1821 };
1822 noffset = ieee80211_ie_split(ie, ie_len,
1823 before_extrates,
1824 ARRAY_SIZE(before_extrates),
1825 *offset);
1826 if (end - pos < noffset - *offset)
1827 goto out_err;
1828 memcpy(pos, ie + *offset, noffset - *offset);
1829 pos += noffset - *offset;
1830 *offset = noffset;
1831 }
1832
1833 ext_rates_len = num_rates - supp_rates_len;
1834 if (ext_rates_len > 0) {
1835 if (end - pos < 2 + ext_rates_len)
1836 goto out_err;
1837 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1838 *pos++ = ext_rates_len;
1839 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1840 pos += ext_rates_len;
1841 }
1842
1843 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1844 if (end - pos < 3)
1845 goto out_err;
1846 *pos++ = WLAN_EID_DS_PARAMS;
1847 *pos++ = 1;
1848 *pos++ = ieee80211_frequency_to_channel(
1849 chandef->chan->center_freq);
1850 }
1851
1852 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1853 goto done;
1854
1855 /* insert custom IEs that go before HT */
1856 if (ie && ie_len) {
1857 static const u8 before_ht[] = {
1858 /*
1859 * no need to list the ones split off already
1860 * (or generated here)
1861 */
1862 WLAN_EID_DS_PARAMS,
1863 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1864 };
1865 noffset = ieee80211_ie_split(ie, ie_len,
1866 before_ht, ARRAY_SIZE(before_ht),
1867 *offset);
1868 if (end - pos < noffset - *offset)
1869 goto out_err;
1870 memcpy(pos, ie + *offset, noffset - *offset);
1871 pos += noffset - *offset;
1872 *offset = noffset;
1873 }
1874
1875 if (sband->ht_cap.ht_supported) {
1876 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1877 goto out_err;
1878 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1879 sband->ht_cap.cap);
1880 }
1881
1882 /* insert custom IEs that go before VHT */
1883 if (ie && ie_len) {
1884 static const u8 before_vht[] = {
1885 /*
1886 * no need to list the ones split off already
1887 * (or generated here)
1888 */
1889 WLAN_EID_BSS_COEX_2040,
1890 WLAN_EID_EXT_CAPABILITY,
1891 WLAN_EID_SSID_LIST,
1892 WLAN_EID_CHANNEL_USAGE,
1893 WLAN_EID_INTERWORKING,
1894 WLAN_EID_MESH_ID,
1895 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1896 };
1897 noffset = ieee80211_ie_split(ie, ie_len,
1898 before_vht, ARRAY_SIZE(before_vht),
1899 *offset);
1900 if (end - pos < noffset - *offset)
1901 goto out_err;
1902 memcpy(pos, ie + *offset, noffset - *offset);
1903 pos += noffset - *offset;
1904 *offset = noffset;
1905 }
1906
1907 /* Check if any channel in this sband supports at least 80 MHz */
1908 for (i = 0; i < sband->n_channels; i++) {
1909 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1910 IEEE80211_CHAN_NO_80MHZ))
1911 continue;
1912
1913 have_80mhz = true;
1914 break;
1915 }
1916
1917 if (sband->vht_cap.vht_supported && have_80mhz) {
1918 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1919 goto out_err;
1920 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1921 sband->vht_cap.cap);
1922 }
1923
1924 /* insert custom IEs that go before HE */
1925 if (ie && ie_len) {
1926 static const u8 before_he[] = {
1927 /*
1928 * no need to list the ones split off before VHT
1929 * or generated here
1930 */
1931 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1932 WLAN_EID_AP_CSN,
1933 /* TODO: add 11ah/11aj/11ak elements */
1934 };
1935 noffset = ieee80211_ie_split(ie, ie_len,
1936 before_he, ARRAY_SIZE(before_he),
1937 *offset);
1938 if (end - pos < noffset - *offset)
1939 goto out_err;
1940 memcpy(pos, ie + *offset, noffset - *offset);
1941 pos += noffset - *offset;
1942 *offset = noffset;
1943 }
1944
1945 he_cap = ieee80211_get_he_sta_cap(sband);
1946 if (he_cap) {
1947 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1948 if (!pos)
1949 goto out_err;
1950
1951 if (sband->band == NL80211_BAND_6GHZ) {
1952 enum nl80211_iftype iftype =
1953 ieee80211_vif_type_p2p(&sdata->vif);
1954 __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1955
1956 pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1957 }
1958 }
1959
1960 /*
1961 * If adding more here, adjust code in main.c
1962 * that calculates local->scan_ies_len.
1963 */
1964
1965 return pos - buffer;
1966 out_err:
1967 WARN_ONCE(1, "not enough space for preq IEs\n");
1968 done:
1969 return pos - buffer;
1970 }
1971
1972 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1973 size_t buffer_len,
1974 struct ieee80211_scan_ies *ie_desc,
1975 const u8 *ie, size_t ie_len,
1976 u8 bands_used, u32 *rate_masks,
1977 struct cfg80211_chan_def *chandef,
1978 u32 flags)
1979 {
1980 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1981 int i;
1982
1983 memset(ie_desc, 0, sizeof(*ie_desc));
1984
1985 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1986 if (bands_used & BIT(i)) {
1987 pos += ieee80211_build_preq_ies_band(sdata,
1988 buffer + pos,
1989 buffer_len - pos,
1990 ie, ie_len, i,
1991 rate_masks[i],
1992 chandef,
1993 &custom_ie_offset,
1994 flags);
1995 ie_desc->ies[i] = buffer + old_pos;
1996 ie_desc->len[i] = pos - old_pos;
1997 old_pos = pos;
1998 }
1999 }
2000
2001 /* add any remaining custom IEs */
2002 if (ie && ie_len) {
2003 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2004 "not enough space for preq custom IEs\n"))
2005 return pos;
2006 memcpy(buffer + pos, ie + custom_ie_offset,
2007 ie_len - custom_ie_offset);
2008 ie_desc->common_ies = buffer + pos;
2009 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2010 pos += ie_len - custom_ie_offset;
2011 }
2012
2013 return pos;
2014 };
2015
2016 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2017 const u8 *src, const u8 *dst,
2018 u32 ratemask,
2019 struct ieee80211_channel *chan,
2020 const u8 *ssid, size_t ssid_len,
2021 const u8 *ie, size_t ie_len,
2022 u32 flags)
2023 {
2024 struct ieee80211_local *local = sdata->local;
2025 struct cfg80211_chan_def chandef;
2026 struct sk_buff *skb;
2027 struct ieee80211_mgmt *mgmt;
2028 int ies_len;
2029 u32 rate_masks[NUM_NL80211_BANDS] = {};
2030 struct ieee80211_scan_ies dummy_ie_desc;
2031
2032 /*
2033 * Do not send DS Channel parameter for directed probe requests
2034 * in order to maximize the chance that we get a response. Some
2035 * badly-behaved APs don't respond when this parameter is included.
2036 */
2037 chandef.width = sdata->vif.bss_conf.chandef.width;
2038 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2039 chandef.chan = NULL;
2040 else
2041 chandef.chan = chan;
2042
2043 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2044 100 + ie_len);
2045 if (!skb)
2046 return NULL;
2047
2048 rate_masks[chan->band] = ratemask;
2049 ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2050 skb_tailroom(skb), &dummy_ie_desc,
2051 ie, ie_len, BIT(chan->band),
2052 rate_masks, &chandef, flags);
2053 skb_put(skb, ies_len);
2054
2055 if (dst) {
2056 mgmt = (struct ieee80211_mgmt *) skb->data;
2057 memcpy(mgmt->da, dst, ETH_ALEN);
2058 memcpy(mgmt->bssid, dst, ETH_ALEN);
2059 }
2060
2061 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2062
2063 return skb;
2064 }
2065
2066 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2067 struct ieee802_11_elems *elems,
2068 enum nl80211_band band, u32 *basic_rates)
2069 {
2070 struct ieee80211_supported_band *sband;
2071 size_t num_rates;
2072 u32 supp_rates, rate_flags;
2073 int i, j, shift;
2074
2075 sband = sdata->local->hw.wiphy->bands[band];
2076 if (WARN_ON(!sband))
2077 return 1;
2078
2079 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2080 shift = ieee80211_vif_get_shift(&sdata->vif);
2081
2082 num_rates = sband->n_bitrates;
2083 supp_rates = 0;
2084 for (i = 0; i < elems->supp_rates_len +
2085 elems->ext_supp_rates_len; i++) {
2086 u8 rate = 0;
2087 int own_rate;
2088 bool is_basic;
2089 if (i < elems->supp_rates_len)
2090 rate = elems->supp_rates[i];
2091 else if (elems->ext_supp_rates)
2092 rate = elems->ext_supp_rates
2093 [i - elems->supp_rates_len];
2094 own_rate = 5 * (rate & 0x7f);
2095 is_basic = !!(rate & 0x80);
2096
2097 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2098 continue;
2099
2100 for (j = 0; j < num_rates; j++) {
2101 int brate;
2102 if ((rate_flags & sband->bitrates[j].flags)
2103 != rate_flags)
2104 continue;
2105
2106 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2107 1 << shift);
2108
2109 if (brate == own_rate) {
2110 supp_rates |= BIT(j);
2111 if (basic_rates && is_basic)
2112 *basic_rates |= BIT(j);
2113 }
2114 }
2115 }
2116 return supp_rates;
2117 }
2118
2119 void ieee80211_stop_device(struct ieee80211_local *local)
2120 {
2121 ieee80211_led_radio(local, false);
2122 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2123
2124 cancel_work_sync(&local->reconfig_filter);
2125
2126 flush_workqueue(local->workqueue);
2127 drv_stop(local);
2128 }
2129
2130 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2131 bool aborted)
2132 {
2133 /* It's possible that we don't handle the scan completion in
2134 * time during suspend, so if it's still marked as completed
2135 * here, queue the work and flush it to clean things up.
2136 * Instead of calling the worker function directly here, we
2137 * really queue it to avoid potential races with other flows
2138 * scheduling the same work.
2139 */
2140 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2141 /* If coming from reconfiguration failure, abort the scan so
2142 * we don't attempt to continue a partial HW scan - which is
2143 * possible otherwise if (e.g.) the 2.4 GHz portion was the
2144 * completed scan, and a 5 GHz portion is still pending.
2145 */
2146 if (aborted)
2147 set_bit(SCAN_ABORTED, &local->scanning);
2148 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2149 flush_delayed_work(&local->scan_work);
2150 }
2151 }
2152
2153 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2154 {
2155 struct ieee80211_sub_if_data *sdata;
2156 struct ieee80211_chanctx *ctx;
2157
2158 /*
2159 * We get here if during resume the device can't be restarted properly.
2160 * We might also get here if this happens during HW reset, which is a
2161 * slightly different situation and we need to drop all connections in
2162 * the latter case.
2163 *
2164 * Ask cfg80211 to turn off all interfaces, this will result in more
2165 * warnings but at least we'll then get into a clean stopped state.
2166 */
2167
2168 local->resuming = false;
2169 local->suspended = false;
2170 local->in_reconfig = false;
2171
2172 ieee80211_flush_completed_scan(local, true);
2173
2174 /* scheduled scan clearly can't be running any more, but tell
2175 * cfg80211 and clear local state
2176 */
2177 ieee80211_sched_scan_end(local);
2178
2179 list_for_each_entry(sdata, &local->interfaces, list)
2180 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2181
2182 /* Mark channel contexts as not being in the driver any more to avoid
2183 * removing them from the driver during the shutdown process...
2184 */
2185 mutex_lock(&local->chanctx_mtx);
2186 list_for_each_entry(ctx, &local->chanctx_list, list)
2187 ctx->driver_present = false;
2188 mutex_unlock(&local->chanctx_mtx);
2189
2190 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2191 }
2192
2193 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2194 struct ieee80211_sub_if_data *sdata)
2195 {
2196 struct ieee80211_chanctx_conf *conf;
2197 struct ieee80211_chanctx *ctx;
2198
2199 if (!local->use_chanctx)
2200 return;
2201
2202 mutex_lock(&local->chanctx_mtx);
2203 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2204 lockdep_is_held(&local->chanctx_mtx));
2205 if (conf) {
2206 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2207 drv_assign_vif_chanctx(local, sdata, ctx);
2208 }
2209 mutex_unlock(&local->chanctx_mtx);
2210 }
2211
2212 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2213 {
2214 struct ieee80211_local *local = sdata->local;
2215 struct sta_info *sta;
2216
2217 /* add STAs back */
2218 mutex_lock(&local->sta_mtx);
2219 list_for_each_entry(sta, &local->sta_list, list) {
2220 enum ieee80211_sta_state state;
2221
2222 if (!sta->uploaded || sta->sdata != sdata)
2223 continue;
2224
2225 for (state = IEEE80211_STA_NOTEXIST;
2226 state < sta->sta_state; state++)
2227 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2228 state + 1));
2229 }
2230 mutex_unlock(&local->sta_mtx);
2231 }
2232
2233 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2234 {
2235 struct cfg80211_nan_func *func, **funcs;
2236 int res, id, i = 0;
2237
2238 res = drv_start_nan(sdata->local, sdata,
2239 &sdata->u.nan.conf);
2240 if (WARN_ON(res))
2241 return res;
2242
2243 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2244 sizeof(*funcs),
2245 GFP_KERNEL);
2246 if (!funcs)
2247 return -ENOMEM;
2248
2249 /* Add all the functions:
2250 * This is a little bit ugly. We need to call a potentially sleeping
2251 * callback for each NAN function, so we can't hold the spinlock.
2252 */
2253 spin_lock_bh(&sdata->u.nan.func_lock);
2254
2255 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2256 funcs[i++] = func;
2257
2258 spin_unlock_bh(&sdata->u.nan.func_lock);
2259
2260 for (i = 0; funcs[i]; i++) {
2261 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2262 if (WARN_ON(res))
2263 ieee80211_nan_func_terminated(&sdata->vif,
2264 funcs[i]->instance_id,
2265 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2266 GFP_KERNEL);
2267 }
2268
2269 kfree(funcs);
2270
2271 return 0;
2272 }
2273
2274 int ieee80211_reconfig(struct ieee80211_local *local)
2275 {
2276 struct ieee80211_hw *hw = &local->hw;
2277 struct ieee80211_sub_if_data *sdata;
2278 struct ieee80211_chanctx *ctx;
2279 struct sta_info *sta;
2280 int res, i;
2281 bool reconfig_due_to_wowlan = false;
2282 struct ieee80211_sub_if_data *sched_scan_sdata;
2283 struct cfg80211_sched_scan_request *sched_scan_req;
2284 bool sched_scan_stopped = false;
2285 bool suspended = local->suspended;
2286
2287 /* nothing to do if HW shouldn't run */
2288 if (!local->open_count)
2289 goto wake_up;
2290
2291 #ifdef CONFIG_PM
2292 if (suspended)
2293 local->resuming = true;
2294
2295 if (local->wowlan) {
2296 /*
2297 * In the wowlan case, both mac80211 and the device
2298 * are functional when the resume op is called, so
2299 * clear local->suspended so the device could operate
2300 * normally (e.g. pass rx frames).
2301 */
2302 local->suspended = false;
2303 res = drv_resume(local);
2304 local->wowlan = false;
2305 if (res < 0) {
2306 local->resuming = false;
2307 return res;
2308 }
2309 if (res == 0)
2310 goto wake_up;
2311 WARN_ON(res > 1);
2312 /*
2313 * res is 1, which means the driver requested
2314 * to go through a regular reset on wakeup.
2315 * restore local->suspended in this case.
2316 */
2317 reconfig_due_to_wowlan = true;
2318 local->suspended = true;
2319 }
2320 #endif
2321
2322 /*
2323 * In case of hw_restart during suspend (without wowlan),
2324 * cancel restart work, as we are reconfiguring the device
2325 * anyway.
2326 * Note that restart_work is scheduled on a frozen workqueue,
2327 * so we can't deadlock in this case.
2328 */
2329 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2330 cancel_work_sync(&local->restart_work);
2331
2332 local->started = false;
2333
2334 /*
2335 * Upon resume hardware can sometimes be goofy due to
2336 * various platform / driver / bus issues, so restarting
2337 * the device may at times not work immediately. Propagate
2338 * the error.
2339 */
2340 res = drv_start(local);
2341 if (res) {
2342 if (suspended)
2343 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2344 else
2345 WARN(1, "Hardware became unavailable during restart.\n");
2346 ieee80211_handle_reconfig_failure(local);
2347 return res;
2348 }
2349
2350 /* setup fragmentation threshold */
2351 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2352
2353 /* setup RTS threshold */
2354 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2355
2356 /* reset coverage class */
2357 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2358
2359 ieee80211_led_radio(local, true);
2360 ieee80211_mod_tpt_led_trig(local,
2361 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2362
2363 /* add interfaces */
2364 sdata = rtnl_dereference(local->monitor_sdata);
2365 if (sdata) {
2366 /* in HW restart it exists already */
2367 WARN_ON(local->resuming);
2368 res = drv_add_interface(local, sdata);
2369 if (WARN_ON(res)) {
2370 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2371 synchronize_net();
2372 kfree(sdata);
2373 }
2374 }
2375
2376 list_for_each_entry(sdata, &local->interfaces, list) {
2377 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2378 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2379 ieee80211_sdata_running(sdata)) {
2380 res = drv_add_interface(local, sdata);
2381 if (WARN_ON(res))
2382 break;
2383 }
2384 }
2385
2386 /* If adding any of the interfaces failed above, roll back and
2387 * report failure.
2388 */
2389 if (res) {
2390 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2391 list)
2392 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2393 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2394 ieee80211_sdata_running(sdata))
2395 drv_remove_interface(local, sdata);
2396 ieee80211_handle_reconfig_failure(local);
2397 return res;
2398 }
2399
2400 /* add channel contexts */
2401 if (local->use_chanctx) {
2402 mutex_lock(&local->chanctx_mtx);
2403 list_for_each_entry(ctx, &local->chanctx_list, list)
2404 if (ctx->replace_state !=
2405 IEEE80211_CHANCTX_REPLACES_OTHER)
2406 WARN_ON(drv_add_chanctx(local, ctx));
2407 mutex_unlock(&local->chanctx_mtx);
2408
2409 sdata = rtnl_dereference(local->monitor_sdata);
2410 if (sdata && ieee80211_sdata_running(sdata))
2411 ieee80211_assign_chanctx(local, sdata);
2412 }
2413
2414 /* reconfigure hardware */
2415 ieee80211_hw_config(local, ~0);
2416
2417 ieee80211_configure_filter(local);
2418
2419 /* Finally also reconfigure all the BSS information */
2420 list_for_each_entry(sdata, &local->interfaces, list) {
2421 u32 changed;
2422
2423 if (!ieee80211_sdata_running(sdata))
2424 continue;
2425
2426 ieee80211_assign_chanctx(local, sdata);
2427
2428 switch (sdata->vif.type) {
2429 case NL80211_IFTYPE_AP_VLAN:
2430 case NL80211_IFTYPE_MONITOR:
2431 break;
2432 case NL80211_IFTYPE_ADHOC:
2433 if (sdata->vif.bss_conf.ibss_joined)
2434 WARN_ON(drv_join_ibss(local, sdata));
2435 fallthrough;
2436 default:
2437 ieee80211_reconfig_stations(sdata);
2438 fallthrough;
2439 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2440 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2441 drv_conf_tx(local, sdata, i,
2442 &sdata->tx_conf[i]);
2443 break;
2444 }
2445
2446 /* common change flags for all interface types */
2447 changed = BSS_CHANGED_ERP_CTS_PROT |
2448 BSS_CHANGED_ERP_PREAMBLE |
2449 BSS_CHANGED_ERP_SLOT |
2450 BSS_CHANGED_HT |
2451 BSS_CHANGED_BASIC_RATES |
2452 BSS_CHANGED_BEACON_INT |
2453 BSS_CHANGED_BSSID |
2454 BSS_CHANGED_CQM |
2455 BSS_CHANGED_QOS |
2456 BSS_CHANGED_IDLE |
2457 BSS_CHANGED_TXPOWER |
2458 BSS_CHANGED_MCAST_RATE;
2459
2460 if (sdata->vif.mu_mimo_owner)
2461 changed |= BSS_CHANGED_MU_GROUPS;
2462
2463 switch (sdata->vif.type) {
2464 case NL80211_IFTYPE_STATION:
2465 changed |= BSS_CHANGED_ASSOC |
2466 BSS_CHANGED_ARP_FILTER |
2467 BSS_CHANGED_PS;
2468
2469 /* Re-send beacon info report to the driver */
2470 if (sdata->u.mgd.have_beacon)
2471 changed |= BSS_CHANGED_BEACON_INFO;
2472
2473 if (sdata->vif.bss_conf.max_idle_period ||
2474 sdata->vif.bss_conf.protected_keep_alive)
2475 changed |= BSS_CHANGED_KEEP_ALIVE;
2476
2477 sdata_lock(sdata);
2478 ieee80211_bss_info_change_notify(sdata, changed);
2479 sdata_unlock(sdata);
2480 break;
2481 case NL80211_IFTYPE_OCB:
2482 changed |= BSS_CHANGED_OCB;
2483 ieee80211_bss_info_change_notify(sdata, changed);
2484 break;
2485 case NL80211_IFTYPE_ADHOC:
2486 changed |= BSS_CHANGED_IBSS;
2487 fallthrough;
2488 case NL80211_IFTYPE_AP:
2489 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2490
2491 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2492 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2493 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2494 changed |= BSS_CHANGED_FTM_RESPONDER;
2495
2496 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2497 changed |= BSS_CHANGED_AP_PROBE_RESP;
2498
2499 if (rcu_access_pointer(sdata->u.ap.beacon))
2500 drv_start_ap(local, sdata);
2501 }
2502 fallthrough;
2503 case NL80211_IFTYPE_MESH_POINT:
2504 if (sdata->vif.bss_conf.enable_beacon) {
2505 changed |= BSS_CHANGED_BEACON |
2506 BSS_CHANGED_BEACON_ENABLED;
2507 ieee80211_bss_info_change_notify(sdata, changed);
2508 }
2509 break;
2510 case NL80211_IFTYPE_NAN:
2511 res = ieee80211_reconfig_nan(sdata);
2512 if (res < 0) {
2513 ieee80211_handle_reconfig_failure(local);
2514 return res;
2515 }
2516 break;
2517 case NL80211_IFTYPE_AP_VLAN:
2518 case NL80211_IFTYPE_MONITOR:
2519 case NL80211_IFTYPE_P2P_DEVICE:
2520 /* nothing to do */
2521 break;
2522 case NL80211_IFTYPE_UNSPECIFIED:
2523 case NUM_NL80211_IFTYPES:
2524 case NL80211_IFTYPE_P2P_CLIENT:
2525 case NL80211_IFTYPE_P2P_GO:
2526 case NL80211_IFTYPE_WDS:
2527 WARN_ON(1);
2528 break;
2529 }
2530 }
2531
2532 ieee80211_recalc_ps(local);
2533
2534 /*
2535 * The sta might be in psm against the ap (e.g. because
2536 * this was the state before a hw restart), so we
2537 * explicitly send a null packet in order to make sure
2538 * it'll sync against the ap (and get out of psm).
2539 */
2540 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2541 list_for_each_entry(sdata, &local->interfaces, list) {
2542 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2543 continue;
2544 if (!sdata->u.mgd.associated)
2545 continue;
2546
2547 ieee80211_send_nullfunc(local, sdata, false);
2548 }
2549 }
2550
2551 /* APs are now beaconing, add back stations */
2552 mutex_lock(&local->sta_mtx);
2553 list_for_each_entry(sta, &local->sta_list, list) {
2554 enum ieee80211_sta_state state;
2555
2556 if (!sta->uploaded)
2557 continue;
2558
2559 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2560 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2561 continue;
2562
2563 for (state = IEEE80211_STA_NOTEXIST;
2564 state < sta->sta_state; state++)
2565 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2566 state + 1));
2567 }
2568 mutex_unlock(&local->sta_mtx);
2569
2570 /* add back keys */
2571 list_for_each_entry(sdata, &local->interfaces, list)
2572 ieee80211_reenable_keys(sdata);
2573
2574 /* Reconfigure sched scan if it was interrupted by FW restart */
2575 mutex_lock(&local->mtx);
2576 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2577 lockdep_is_held(&local->mtx));
2578 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2579 lockdep_is_held(&local->mtx));
2580 if (sched_scan_sdata && sched_scan_req)
2581 /*
2582 * Sched scan stopped, but we don't want to report it. Instead,
2583 * we're trying to reschedule. However, if more than one scan
2584 * plan was set, we cannot reschedule since we don't know which
2585 * scan plan was currently running (and some scan plans may have
2586 * already finished).
2587 */
2588 if (sched_scan_req->n_scan_plans > 1 ||
2589 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2590 sched_scan_req)) {
2591 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2592 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2593 sched_scan_stopped = true;
2594 }
2595 mutex_unlock(&local->mtx);
2596
2597 if (sched_scan_stopped)
2598 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2599
2600 wake_up:
2601
2602 if (local->monitors == local->open_count && local->monitors > 0)
2603 ieee80211_add_virtual_monitor(local);
2604
2605 /*
2606 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2607 * sessions can be established after a resume.
2608 *
2609 * Also tear down aggregation sessions since reconfiguring
2610 * them in a hardware restart scenario is not easily done
2611 * right now, and the hardware will have lost information
2612 * about the sessions, but we and the AP still think they
2613 * are active. This is really a workaround though.
2614 */
2615 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2616 mutex_lock(&local->sta_mtx);
2617
2618 list_for_each_entry(sta, &local->sta_list, list) {
2619 if (!local->resuming)
2620 ieee80211_sta_tear_down_BA_sessions(
2621 sta, AGG_STOP_LOCAL_REQUEST);
2622 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2623 }
2624
2625 mutex_unlock(&local->sta_mtx);
2626 }
2627
2628 if (local->in_reconfig) {
2629 local->in_reconfig = false;
2630 barrier();
2631
2632 /* Restart deferred ROCs */
2633 mutex_lock(&local->mtx);
2634 ieee80211_start_next_roc(local);
2635 mutex_unlock(&local->mtx);
2636
2637 /* Requeue all works */
2638 list_for_each_entry(sdata, &local->interfaces, list)
2639 ieee80211_queue_work(&local->hw, &sdata->work);
2640 }
2641
2642 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2643 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2644 false);
2645
2646 /*
2647 * If this is for hw restart things are still running.
2648 * We may want to change that later, however.
2649 */
2650 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2651 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2652
2653 if (!suspended)
2654 return 0;
2655
2656 #ifdef CONFIG_PM
2657 /* first set suspended false, then resuming */
2658 local->suspended = false;
2659 mb();
2660 local->resuming = false;
2661
2662 ieee80211_flush_completed_scan(local, false);
2663
2664 if (local->open_count && !reconfig_due_to_wowlan)
2665 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2666
2667 list_for_each_entry(sdata, &local->interfaces, list) {
2668 if (!ieee80211_sdata_running(sdata))
2669 continue;
2670 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2671 ieee80211_sta_restart(sdata);
2672 }
2673
2674 mod_timer(&local->sta_cleanup, jiffies + 1);
2675 #else
2676 WARN_ON(1);
2677 #endif
2678
2679 return 0;
2680 }
2681
2682 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2683 {
2684 struct ieee80211_sub_if_data *sdata;
2685 struct ieee80211_local *local;
2686 struct ieee80211_key *key;
2687
2688 if (WARN_ON(!vif))
2689 return;
2690
2691 sdata = vif_to_sdata(vif);
2692 local = sdata->local;
2693
2694 if (WARN_ON(!local->resuming))
2695 return;
2696
2697 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2698 return;
2699
2700 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2701
2702 mutex_lock(&local->key_mtx);
2703 list_for_each_entry(key, &sdata->key_list, list)
2704 key->flags |= KEY_FLAG_TAINTED;
2705 mutex_unlock(&local->key_mtx);
2706 }
2707 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2708
2709 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2710 {
2711 struct ieee80211_local *local = sdata->local;
2712 struct ieee80211_chanctx_conf *chanctx_conf;
2713 struct ieee80211_chanctx *chanctx;
2714
2715 mutex_lock(&local->chanctx_mtx);
2716
2717 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2718 lockdep_is_held(&local->chanctx_mtx));
2719
2720 /*
2721 * This function can be called from a work, thus it may be possible
2722 * that the chanctx_conf is removed (due to a disconnection, for
2723 * example).
2724 * So nothing should be done in such case.
2725 */
2726 if (!chanctx_conf)
2727 goto unlock;
2728
2729 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2730 ieee80211_recalc_smps_chanctx(local, chanctx);
2731 unlock:
2732 mutex_unlock(&local->chanctx_mtx);
2733 }
2734
2735 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2736 {
2737 struct ieee80211_local *local = sdata->local;
2738 struct ieee80211_chanctx_conf *chanctx_conf;
2739 struct ieee80211_chanctx *chanctx;
2740
2741 mutex_lock(&local->chanctx_mtx);
2742
2743 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2744 lockdep_is_held(&local->chanctx_mtx));
2745
2746 if (WARN_ON_ONCE(!chanctx_conf))
2747 goto unlock;
2748
2749 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2750 ieee80211_recalc_chanctx_min_def(local, chanctx);
2751 unlock:
2752 mutex_unlock(&local->chanctx_mtx);
2753 }
2754
2755 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2756 {
2757 size_t pos = offset;
2758
2759 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2760 pos += 2 + ies[pos + 1];
2761
2762 return pos;
2763 }
2764
2765 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2766 int rssi_min_thold,
2767 int rssi_max_thold)
2768 {
2769 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2770
2771 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2772 return;
2773
2774 /*
2775 * Scale up threshold values before storing it, as the RSSI averaging
2776 * algorithm uses a scaled up value as well. Change this scaling
2777 * factor if the RSSI averaging algorithm changes.
2778 */
2779 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2780 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2781 }
2782
2783 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2784 int rssi_min_thold,
2785 int rssi_max_thold)
2786 {
2787 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2788
2789 WARN_ON(rssi_min_thold == rssi_max_thold ||
2790 rssi_min_thold > rssi_max_thold);
2791
2792 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2793 rssi_max_thold);
2794 }
2795 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2796
2797 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2798 {
2799 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2800
2801 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2802 }
2803 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2804
2805 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2806 u16 cap)
2807 {
2808 __le16 tmp;
2809
2810 *pos++ = WLAN_EID_HT_CAPABILITY;
2811 *pos++ = sizeof(struct ieee80211_ht_cap);
2812 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2813
2814 /* capability flags */
2815 tmp = cpu_to_le16(cap);
2816 memcpy(pos, &tmp, sizeof(u16));
2817 pos += sizeof(u16);
2818
2819 /* AMPDU parameters */
2820 *pos++ = ht_cap->ampdu_factor |
2821 (ht_cap->ampdu_density <<
2822 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2823
2824 /* MCS set */
2825 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2826 pos += sizeof(ht_cap->mcs);
2827
2828 /* extended capabilities */
2829 pos += sizeof(__le16);
2830
2831 /* BF capabilities */
2832 pos += sizeof(__le32);
2833
2834 /* antenna selection */
2835 pos += sizeof(u8);
2836
2837 return pos;
2838 }
2839
2840 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2841 u32 cap)
2842 {
2843 __le32 tmp;
2844
2845 *pos++ = WLAN_EID_VHT_CAPABILITY;
2846 *pos++ = sizeof(struct ieee80211_vht_cap);
2847 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2848
2849 /* capability flags */
2850 tmp = cpu_to_le32(cap);
2851 memcpy(pos, &tmp, sizeof(u32));
2852 pos += sizeof(u32);
2853
2854 /* VHT MCS set */
2855 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2856 pos += sizeof(vht_cap->vht_mcs);
2857
2858 return pos;
2859 }
2860
2861 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2862 {
2863 const struct ieee80211_sta_he_cap *he_cap;
2864 struct ieee80211_supported_band *sband;
2865 u8 n;
2866
2867 sband = ieee80211_get_sband(sdata);
2868 if (!sband)
2869 return 0;
2870
2871 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2872 if (!he_cap)
2873 return 0;
2874
2875 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2876 return 2 + 1 +
2877 sizeof(he_cap->he_cap_elem) + n +
2878 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2879 he_cap->he_cap_elem.phy_cap_info);
2880 }
2881
2882 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2883 const struct ieee80211_sta_he_cap *he_cap,
2884 u8 *end)
2885 {
2886 u8 n;
2887 u8 ie_len;
2888 u8 *orig_pos = pos;
2889
2890 /* Make sure we have place for the IE */
2891 /*
2892 * TODO: the 1 added is because this temporarily is under the EXTENSION
2893 * IE. Get rid of it when it moves.
2894 */
2895 if (!he_cap)
2896 return orig_pos;
2897
2898 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2899 ie_len = 2 + 1 +
2900 sizeof(he_cap->he_cap_elem) + n +
2901 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2902 he_cap->he_cap_elem.phy_cap_info);
2903
2904 if ((end - pos) < ie_len)
2905 return orig_pos;
2906
2907 *pos++ = WLAN_EID_EXTENSION;
2908 pos++; /* We'll set the size later below */
2909 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2910
2911 /* Fixed data */
2912 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2913 pos += sizeof(he_cap->he_cap_elem);
2914
2915 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2916 pos += n;
2917
2918 /* Check if PPE Threshold should be present */
2919 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2920 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2921 goto end;
2922
2923 /*
2924 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2925 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2926 */
2927 n = hweight8(he_cap->ppe_thres[0] &
2928 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2929 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2930 IEEE80211_PPE_THRES_NSS_POS));
2931
2932 /*
2933 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2934 * total size.
2935 */
2936 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2937 n = DIV_ROUND_UP(n, 8);
2938
2939 /* Copy PPE Thresholds */
2940 memcpy(pos, &he_cap->ppe_thres, n);
2941 pos += n;
2942
2943 end:
2944 orig_pos[1] = (pos - orig_pos) - 2;
2945 return pos;
2946 }
2947
2948 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2949 struct sk_buff *skb)
2950 {
2951 struct ieee80211_supported_band *sband;
2952 const struct ieee80211_sband_iftype_data *iftd;
2953 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2954 u8 *pos;
2955 u16 cap;
2956
2957 sband = ieee80211_get_sband(sdata);
2958 if (!sband)
2959 return;
2960
2961 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2962 if (WARN_ON(!iftd))
2963 return;
2964
2965 /* Check for device HE 6 GHz capability before adding element */
2966 if (!iftd->he_6ghz_capa.capa)
2967 return;
2968
2969 cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2970 cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2971
2972 switch (sdata->smps_mode) {
2973 case IEEE80211_SMPS_AUTOMATIC:
2974 case IEEE80211_SMPS_NUM_MODES:
2975 WARN_ON(1);
2976 fallthrough;
2977 case IEEE80211_SMPS_OFF:
2978 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2979 IEEE80211_HE_6GHZ_CAP_SM_PS);
2980 break;
2981 case IEEE80211_SMPS_STATIC:
2982 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2983 IEEE80211_HE_6GHZ_CAP_SM_PS);
2984 break;
2985 case IEEE80211_SMPS_DYNAMIC:
2986 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2987 IEEE80211_HE_6GHZ_CAP_SM_PS);
2988 break;
2989 }
2990
2991 pos = skb_put(skb, 2 + 1 + sizeof(cap));
2992 ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
2993 pos + 2 + 1 + sizeof(cap));
2994 }
2995
2996 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2997 const struct cfg80211_chan_def *chandef,
2998 u16 prot_mode, bool rifs_mode)
2999 {
3000 struct ieee80211_ht_operation *ht_oper;
3001 /* Build HT Information */
3002 *pos++ = WLAN_EID_HT_OPERATION;
3003 *pos++ = sizeof(struct ieee80211_ht_operation);
3004 ht_oper = (struct ieee80211_ht_operation *)pos;
3005 ht_oper->primary_chan = ieee80211_frequency_to_channel(
3006 chandef->chan->center_freq);
3007 switch (chandef->width) {
3008 case NL80211_CHAN_WIDTH_160:
3009 case NL80211_CHAN_WIDTH_80P80:
3010 case NL80211_CHAN_WIDTH_80:
3011 case NL80211_CHAN_WIDTH_40:
3012 if (chandef->center_freq1 > chandef->chan->center_freq)
3013 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3014 else
3015 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3016 break;
3017 default:
3018 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3019 break;
3020 }
3021 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3022 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3023 chandef->width != NL80211_CHAN_WIDTH_20)
3024 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3025
3026 if (rifs_mode)
3027 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3028
3029 ht_oper->operation_mode = cpu_to_le16(prot_mode);
3030 ht_oper->stbc_param = 0x0000;
3031
3032 /* It seems that Basic MCS set and Supported MCS set
3033 are identical for the first 10 bytes */
3034 memset(&ht_oper->basic_set, 0, 16);
3035 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3036
3037 return pos + sizeof(struct ieee80211_ht_operation);
3038 }
3039
3040 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3041 const struct cfg80211_chan_def *chandef)
3042 {
3043 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
3044 *pos++ = 3; /* IE length */
3045 /* New channel width */
3046 switch (chandef->width) {
3047 case NL80211_CHAN_WIDTH_80:
3048 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3049 break;
3050 case NL80211_CHAN_WIDTH_160:
3051 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3052 break;
3053 case NL80211_CHAN_WIDTH_80P80:
3054 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3055 break;
3056 default:
3057 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3058 }
3059
3060 /* new center frequency segment 0 */
3061 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3062 /* new center frequency segment 1 */
3063 if (chandef->center_freq2)
3064 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3065 else
3066 *pos++ = 0;
3067 }
3068
3069 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3070 const struct cfg80211_chan_def *chandef)
3071 {
3072 struct ieee80211_vht_operation *vht_oper;
3073
3074 *pos++ = WLAN_EID_VHT_OPERATION;
3075 *pos++ = sizeof(struct ieee80211_vht_operation);
3076 vht_oper = (struct ieee80211_vht_operation *)pos;
3077 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3078 chandef->center_freq1);
3079 if (chandef->center_freq2)
3080 vht_oper->center_freq_seg1_idx =
3081 ieee80211_frequency_to_channel(chandef->center_freq2);
3082 else
3083 vht_oper->center_freq_seg1_idx = 0x00;
3084
3085 switch (chandef->width) {
3086 case NL80211_CHAN_WIDTH_160:
3087 /*
3088 * Convert 160 MHz channel width to new style as interop
3089 * workaround.
3090 */
3091 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3092 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3093 if (chandef->chan->center_freq < chandef->center_freq1)
3094 vht_oper->center_freq_seg0_idx -= 8;
3095 else
3096 vht_oper->center_freq_seg0_idx += 8;
3097 break;
3098 case NL80211_CHAN_WIDTH_80P80:
3099 /*
3100 * Convert 80+80 MHz channel width to new style as interop
3101 * workaround.
3102 */
3103 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3104 break;
3105 case NL80211_CHAN_WIDTH_80:
3106 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3107 break;
3108 default:
3109 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3110 break;
3111 }
3112
3113 /* don't require special VHT peer rates */
3114 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3115
3116 return pos + sizeof(struct ieee80211_vht_operation);
3117 }
3118
3119 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3120 {
3121 struct ieee80211_he_operation *he_oper;
3122 struct ieee80211_he_6ghz_oper *he_6ghz_op;
3123 u32 he_oper_params;
3124 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3125
3126 if (chandef->chan->band == NL80211_BAND_6GHZ)
3127 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3128
3129 *pos++ = WLAN_EID_EXTENSION;
3130 *pos++ = ie_len;
3131 *pos++ = WLAN_EID_EXT_HE_OPERATION;
3132
3133 he_oper_params = 0;
3134 he_oper_params |= u32_encode_bits(1023, /* disabled */
3135 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3136 he_oper_params |= u32_encode_bits(1,
3137 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3138 he_oper_params |= u32_encode_bits(1,
3139 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3140 if (chandef->chan->band == NL80211_BAND_6GHZ)
3141 he_oper_params |= u32_encode_bits(1,
3142 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3143
3144 he_oper = (struct ieee80211_he_operation *)pos;
3145 he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3146
3147 /* don't require special HE peer rates */
3148 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3149 pos += sizeof(struct ieee80211_he_operation);
3150
3151 if (chandef->chan->band != NL80211_BAND_6GHZ)
3152 goto out;
3153
3154 /* TODO add VHT operational */
3155 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3156 he_6ghz_op->minrate = 6; /* 6 Mbps */
3157 he_6ghz_op->primary =
3158 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3159 he_6ghz_op->ccfs0 =
3160 ieee80211_frequency_to_channel(chandef->center_freq1);
3161 if (chandef->center_freq2)
3162 he_6ghz_op->ccfs1 =
3163 ieee80211_frequency_to_channel(chandef->center_freq2);
3164 else
3165 he_6ghz_op->ccfs1 = 0;
3166
3167 switch (chandef->width) {
3168 case NL80211_CHAN_WIDTH_160:
3169 /* Convert 160 MHz channel width to new style as interop
3170 * workaround.
3171 */
3172 he_6ghz_op->control =
3173 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3174 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3175 if (chandef->chan->center_freq < chandef->center_freq1)
3176 he_6ghz_op->ccfs0 -= 8;
3177 else
3178 he_6ghz_op->ccfs0 += 8;
3179 fallthrough;
3180 case NL80211_CHAN_WIDTH_80P80:
3181 he_6ghz_op->control =
3182 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3183 break;
3184 case NL80211_CHAN_WIDTH_80:
3185 he_6ghz_op->control =
3186 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3187 break;
3188 case NL80211_CHAN_WIDTH_40:
3189 he_6ghz_op->control =
3190 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3191 break;
3192 default:
3193 he_6ghz_op->control =
3194 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3195 break;
3196 }
3197
3198 pos += sizeof(struct ieee80211_he_6ghz_oper);
3199
3200 out:
3201 return pos;
3202 }
3203
3204 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3205 struct cfg80211_chan_def *chandef)
3206 {
3207 enum nl80211_channel_type channel_type;
3208
3209 if (!ht_oper)
3210 return false;
3211
3212 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3213 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3214 channel_type = NL80211_CHAN_HT20;
3215 break;
3216 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3217 channel_type = NL80211_CHAN_HT40PLUS;
3218 break;
3219 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3220 channel_type = NL80211_CHAN_HT40MINUS;
3221 break;
3222 default:
3223 channel_type = NL80211_CHAN_NO_HT;
3224 return false;
3225 }
3226
3227 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3228 return true;
3229 }
3230
3231 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3232 const struct ieee80211_vht_operation *oper,
3233 const struct ieee80211_ht_operation *htop,
3234 struct cfg80211_chan_def *chandef)
3235 {
3236 struct cfg80211_chan_def new = *chandef;
3237 int cf0, cf1;
3238 int ccfs0, ccfs1, ccfs2;
3239 int ccf0, ccf1;
3240 u32 vht_cap;
3241 bool support_80_80 = false;
3242 bool support_160 = false;
3243 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3244 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3245 u8 supp_chwidth = u32_get_bits(vht_cap_info,
3246 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3247
3248 if (!oper || !htop)
3249 return false;
3250
3251 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3252 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3253 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3254 support_80_80 = ((vht_cap &
3255 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3256 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3257 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3258 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3259 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3260 ccfs0 = oper->center_freq_seg0_idx;
3261 ccfs1 = oper->center_freq_seg1_idx;
3262 ccfs2 = (le16_to_cpu(htop->operation_mode) &
3263 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3264 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3265
3266 ccf0 = ccfs0;
3267
3268 /* if not supported, parse as though we didn't understand it */
3269 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3270 ext_nss_bw_supp = 0;
3271
3272 /*
3273 * Cf. IEEE 802.11 Table 9-250
3274 *
3275 * We really just consider that because it's inefficient to connect
3276 * at a higher bandwidth than we'll actually be able to use.
3277 */
3278 switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3279 default:
3280 case 0x00:
3281 ccf1 = 0;
3282 support_160 = false;
3283 support_80_80 = false;
3284 break;
3285 case 0x01:
3286 support_80_80 = false;
3287 fallthrough;
3288 case 0x02:
3289 case 0x03:
3290 ccf1 = ccfs2;
3291 break;
3292 case 0x10:
3293 ccf1 = ccfs1;
3294 break;
3295 case 0x11:
3296 case 0x12:
3297 if (!ccfs1)
3298 ccf1 = ccfs2;
3299 else
3300 ccf1 = ccfs1;
3301 break;
3302 case 0x13:
3303 case 0x20:
3304 case 0x23:
3305 ccf1 = ccfs1;
3306 break;
3307 }
3308
3309 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3310 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3311
3312 switch (oper->chan_width) {
3313 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3314 /* just use HT information directly */
3315 break;
3316 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3317 new.width = NL80211_CHAN_WIDTH_80;
3318 new.center_freq1 = cf0;
3319 /* If needed, adjust based on the newer interop workaround. */
3320 if (ccf1) {
3321 unsigned int diff;
3322
3323 diff = abs(ccf1 - ccf0);
3324 if ((diff == 8) && support_160) {
3325 new.width = NL80211_CHAN_WIDTH_160;
3326 new.center_freq1 = cf1;
3327 } else if ((diff > 8) && support_80_80) {
3328 new.width = NL80211_CHAN_WIDTH_80P80;
3329 new.center_freq2 = cf1;
3330 }
3331 }
3332 break;
3333 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3334 /* deprecated encoding */
3335 new.width = NL80211_CHAN_WIDTH_160;
3336 new.center_freq1 = cf0;
3337 break;
3338 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3339 /* deprecated encoding */
3340 new.width = NL80211_CHAN_WIDTH_80P80;
3341 new.center_freq1 = cf0;
3342 new.center_freq2 = cf1;
3343 break;
3344 default:
3345 return false;
3346 }
3347
3348 if (!cfg80211_chandef_valid(&new))
3349 return false;
3350
3351 *chandef = new;
3352 return true;
3353 }
3354
3355 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3356 const struct ieee80211_he_operation *he_oper,
3357 struct cfg80211_chan_def *chandef)
3358 {
3359 struct ieee80211_local *local = sdata->local;
3360 struct ieee80211_supported_band *sband;
3361 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3362 const struct ieee80211_sta_he_cap *he_cap;
3363 struct cfg80211_chan_def he_chandef = *chandef;
3364 const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3365 bool support_80_80, support_160;
3366 u8 he_phy_cap;
3367 u32 freq;
3368
3369 if (chandef->chan->band != NL80211_BAND_6GHZ)
3370 return true;
3371
3372 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3373
3374 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3375 if (!he_cap) {
3376 sdata_info(sdata, "Missing iftype sband data/HE cap");
3377 return false;
3378 }
3379
3380 he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3381 support_160 =
3382 he_phy_cap &
3383 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3384 support_80_80 =
3385 he_phy_cap &
3386 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3387
3388 if (!he_oper) {
3389 sdata_info(sdata,
3390 "HE is not advertised on (on %d MHz), expect issues\n",
3391 chandef->chan->center_freq);
3392 return false;
3393 }
3394
3395 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3396
3397 if (!he_6ghz_oper) {
3398 sdata_info(sdata,
3399 "HE 6GHz operation missing (on %d MHz), expect issues\n",
3400 chandef->chan->center_freq);
3401 return false;
3402 }
3403
3404 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3405 NL80211_BAND_6GHZ);
3406 he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3407
3408 switch (u8_get_bits(he_6ghz_oper->control,
3409 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3410 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3411 he_chandef.width = NL80211_CHAN_WIDTH_20;
3412 break;
3413 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3414 he_chandef.width = NL80211_CHAN_WIDTH_40;
3415 break;
3416 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3417 he_chandef.width = NL80211_CHAN_WIDTH_80;
3418 break;
3419 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3420 he_chandef.width = NL80211_CHAN_WIDTH_80;
3421 if (!he_6ghz_oper->ccfs1)
3422 break;
3423 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3424 if (support_160)
3425 he_chandef.width = NL80211_CHAN_WIDTH_160;
3426 } else {
3427 if (support_80_80)
3428 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3429 }
3430 break;
3431 }
3432
3433 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3434 he_chandef.center_freq1 =
3435 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3436 NL80211_BAND_6GHZ);
3437 } else {
3438 he_chandef.center_freq1 =
3439 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3440 NL80211_BAND_6GHZ);
3441 if (support_80_80 || support_160)
3442 he_chandef.center_freq2 =
3443 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3444 NL80211_BAND_6GHZ);
3445 }
3446
3447 if (!cfg80211_chandef_valid(&he_chandef)) {
3448 sdata_info(sdata,
3449 "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3450 he_chandef.chan ? he_chandef.chan->center_freq : 0,
3451 he_chandef.width,
3452 he_chandef.center_freq1,
3453 he_chandef.center_freq2);
3454 return false;
3455 }
3456
3457 *chandef = he_chandef;
3458
3459 return true;
3460 }
3461
3462 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3463 struct cfg80211_chan_def *chandef)
3464 {
3465 u32 oper_freq;
3466
3467 if (!oper)
3468 return false;
3469
3470 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3471 case IEEE80211_S1G_CHANWIDTH_1MHZ:
3472 chandef->width = NL80211_CHAN_WIDTH_1;
3473 break;
3474 case IEEE80211_S1G_CHANWIDTH_2MHZ:
3475 chandef->width = NL80211_CHAN_WIDTH_2;
3476 break;
3477 case IEEE80211_S1G_CHANWIDTH_4MHZ:
3478 chandef->width = NL80211_CHAN_WIDTH_4;
3479 break;
3480 case IEEE80211_S1G_CHANWIDTH_8MHZ:
3481 chandef->width = NL80211_CHAN_WIDTH_8;
3482 break;
3483 case IEEE80211_S1G_CHANWIDTH_16MHZ:
3484 chandef->width = NL80211_CHAN_WIDTH_16;
3485 break;
3486 default:
3487 return false;
3488 }
3489
3490 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3491 NL80211_BAND_S1GHZ);
3492 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3493 chandef->freq1_offset = oper_freq % 1000;
3494
3495 return true;
3496 }
3497
3498 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3499 const struct ieee80211_supported_band *sband,
3500 const u8 *srates, int srates_len, u32 *rates)
3501 {
3502 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3503 int shift = ieee80211_chandef_get_shift(chandef);
3504 struct ieee80211_rate *br;
3505 int brate, rate, i, j, count = 0;
3506
3507 *rates = 0;
3508
3509 for (i = 0; i < srates_len; i++) {
3510 rate = srates[i] & 0x7f;
3511
3512 for (j = 0; j < sband->n_bitrates; j++) {
3513 br = &sband->bitrates[j];
3514 if ((rate_flags & br->flags) != rate_flags)
3515 continue;
3516
3517 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3518 if (brate == rate) {
3519 *rates |= BIT(j);
3520 count++;
3521 break;
3522 }
3523 }
3524 }
3525 return count;
3526 }
3527
3528 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3529 struct sk_buff *skb, bool need_basic,
3530 enum nl80211_band band)
3531 {
3532 struct ieee80211_local *local = sdata->local;
3533 struct ieee80211_supported_band *sband;
3534 int rate, shift;
3535 u8 i, rates, *pos;
3536 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3537 u32 rate_flags;
3538
3539 shift = ieee80211_vif_get_shift(&sdata->vif);
3540 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3541 sband = local->hw.wiphy->bands[band];
3542 rates = 0;
3543 for (i = 0; i < sband->n_bitrates; i++) {
3544 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3545 continue;
3546 rates++;
3547 }
3548 if (rates > 8)
3549 rates = 8;
3550
3551 if (skb_tailroom(skb) < rates + 2)
3552 return -ENOMEM;
3553
3554 pos = skb_put(skb, rates + 2);
3555 *pos++ = WLAN_EID_SUPP_RATES;
3556 *pos++ = rates;
3557 for (i = 0; i < rates; i++) {
3558 u8 basic = 0;
3559 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3560 continue;
3561
3562 if (need_basic && basic_rates & BIT(i))
3563 basic = 0x80;
3564 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3565 5 * (1 << shift));
3566 *pos++ = basic | (u8) rate;
3567 }
3568
3569 return 0;
3570 }
3571
3572 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3573 struct sk_buff *skb, bool need_basic,
3574 enum nl80211_band band)
3575 {
3576 struct ieee80211_local *local = sdata->local;
3577 struct ieee80211_supported_band *sband;
3578 int rate, shift;
3579 u8 i, exrates, *pos;
3580 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3581 u32 rate_flags;
3582
3583 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3584 shift = ieee80211_vif_get_shift(&sdata->vif);
3585
3586 sband = local->hw.wiphy->bands[band];
3587 exrates = 0;
3588 for (i = 0; i < sband->n_bitrates; i++) {
3589 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3590 continue;
3591 exrates++;
3592 }
3593
3594 if (exrates > 8)
3595 exrates -= 8;
3596 else
3597 exrates = 0;
3598
3599 if (skb_tailroom(skb) < exrates + 2)
3600 return -ENOMEM;
3601
3602 if (exrates) {
3603 pos = skb_put(skb, exrates + 2);
3604 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3605 *pos++ = exrates;
3606 for (i = 8; i < sband->n_bitrates; i++) {
3607 u8 basic = 0;
3608 if ((rate_flags & sband->bitrates[i].flags)
3609 != rate_flags)
3610 continue;
3611 if (need_basic && basic_rates & BIT(i))
3612 basic = 0x80;
3613 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3614 5 * (1 << shift));
3615 *pos++ = basic | (u8) rate;
3616 }
3617 }
3618 return 0;
3619 }
3620
3621 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3622 {
3623 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3625
3626 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3627 /* non-managed type inferfaces */
3628 return 0;
3629 }
3630 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3631 }
3632 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3633
3634 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3635 {
3636 if (!mcs)
3637 return 1;
3638
3639 /* TODO: consider rx_highest */
3640
3641 if (mcs->rx_mask[3])
3642 return 4;
3643 if (mcs->rx_mask[2])
3644 return 3;
3645 if (mcs->rx_mask[1])
3646 return 2;
3647 return 1;
3648 }
3649
3650 /**
3651 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3652 * @local: mac80211 hw info struct
3653 * @status: RX status
3654 * @mpdu_len: total MPDU length (including FCS)
3655 * @mpdu_offset: offset into MPDU to calculate timestamp at
3656 *
3657 * This function calculates the RX timestamp at the given MPDU offset, taking
3658 * into account what the RX timestamp was. An offset of 0 will just normalize
3659 * the timestamp to TSF at beginning of MPDU reception.
3660 */
3661 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3662 struct ieee80211_rx_status *status,
3663 unsigned int mpdu_len,
3664 unsigned int mpdu_offset)
3665 {
3666 u64 ts = status->mactime;
3667 struct rate_info ri;
3668 u16 rate;
3669 u8 n_ltf;
3670
3671 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3672 return 0;
3673
3674 memset(&ri, 0, sizeof(ri));
3675
3676 ri.bw = status->bw;
3677
3678 /* Fill cfg80211 rate info */
3679 switch (status->encoding) {
3680 case RX_ENC_HE:
3681 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3682 ri.mcs = status->rate_idx;
3683 ri.nss = status->nss;
3684 ri.he_ru_alloc = status->he_ru;
3685 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3686 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3687
3688 /*
3689 * See P802.11ax_D6.0, section 27.3.4 for
3690 * VHT PPDU format.
3691 */
3692 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3693 mpdu_offset += 2;
3694 ts += 36;
3695
3696 /*
3697 * TODO:
3698 * For HE MU PPDU, add the HE-SIG-B.
3699 * For HE ER PPDU, add 8us for the HE-SIG-A.
3700 * For HE TB PPDU, add 4us for the HE-STF.
3701 * Add the HE-LTF durations - variable.
3702 */
3703 }
3704
3705 break;
3706 case RX_ENC_HT:
3707 ri.mcs = status->rate_idx;
3708 ri.flags |= RATE_INFO_FLAGS_MCS;
3709 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3710 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3711
3712 /*
3713 * See P802.11REVmd_D3.0, section 19.3.2 for
3714 * HT PPDU format.
3715 */
3716 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3717 mpdu_offset += 2;
3718 if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3719 ts += 24;
3720 else
3721 ts += 32;
3722
3723 /*
3724 * Add Data HT-LTFs per streams
3725 * TODO: add Extension HT-LTFs, 4us per LTF
3726 */
3727 n_ltf = ((ri.mcs >> 3) & 3) + 1;
3728 n_ltf = n_ltf == 3 ? 4 : n_ltf;
3729 ts += n_ltf * 4;
3730 }
3731
3732 break;
3733 case RX_ENC_VHT:
3734 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3735 ri.mcs = status->rate_idx;
3736 ri.nss = status->nss;
3737 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3738 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3739
3740 /*
3741 * See P802.11REVmd_D3.0, section 21.3.2 for
3742 * VHT PPDU format.
3743 */
3744 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3745 mpdu_offset += 2;
3746 ts += 36;
3747
3748 /*
3749 * Add VHT-LTFs per streams
3750 */
3751 n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3752 ri.nss + 1 : ri.nss;
3753 ts += 4 * n_ltf;
3754 }
3755
3756 break;
3757 default:
3758 WARN_ON(1);
3759 fallthrough;
3760 case RX_ENC_LEGACY: {
3761 struct ieee80211_supported_band *sband;
3762 int shift = 0;
3763 int bitrate;
3764
3765 switch (status->bw) {
3766 case RATE_INFO_BW_10:
3767 shift = 1;
3768 break;
3769 case RATE_INFO_BW_5:
3770 shift = 2;
3771 break;
3772 }
3773
3774 sband = local->hw.wiphy->bands[status->band];
3775 bitrate = sband->bitrates[status->rate_idx].bitrate;
3776 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3777
3778 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3779 if (status->band == NL80211_BAND_5GHZ) {
3780 ts += 20 << shift;
3781 mpdu_offset += 2;
3782 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3783 ts += 96;
3784 } else {
3785 ts += 192;
3786 }
3787 }
3788 break;
3789 }
3790 }
3791
3792 rate = cfg80211_calculate_bitrate(&ri);
3793 if (WARN_ONCE(!rate,
3794 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3795 (unsigned long long)status->flag, status->rate_idx,
3796 status->nss))
3797 return 0;
3798
3799 /* rewind from end of MPDU */
3800 if (status->flag & RX_FLAG_MACTIME_END)
3801 ts -= mpdu_len * 8 * 10 / rate;
3802
3803 ts += mpdu_offset * 8 * 10 / rate;
3804
3805 return ts;
3806 }
3807
3808 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3809 {
3810 struct ieee80211_sub_if_data *sdata;
3811 struct cfg80211_chan_def chandef;
3812
3813 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3814 ASSERT_RTNL();
3815
3816 mutex_lock(&local->mtx);
3817 list_for_each_entry(sdata, &local->interfaces, list) {
3818 /* it might be waiting for the local->mtx, but then
3819 * by the time it gets it, sdata->wdev.cac_started
3820 * will no longer be true
3821 */
3822 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3823
3824 if (sdata->wdev.cac_started) {
3825 chandef = sdata->vif.bss_conf.chandef;
3826 ieee80211_vif_release_channel(sdata);
3827 cfg80211_cac_event(sdata->dev,
3828 &chandef,
3829 NL80211_RADAR_CAC_ABORTED,
3830 GFP_KERNEL);
3831 }
3832 }
3833 mutex_unlock(&local->mtx);
3834 }
3835
3836 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3837 {
3838 struct ieee80211_local *local =
3839 container_of(work, struct ieee80211_local, radar_detected_work);
3840 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3841 struct ieee80211_chanctx *ctx;
3842 int num_chanctx = 0;
3843
3844 mutex_lock(&local->chanctx_mtx);
3845 list_for_each_entry(ctx, &local->chanctx_list, list) {
3846 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3847 continue;
3848
3849 num_chanctx++;
3850 chandef = ctx->conf.def;
3851 }
3852 mutex_unlock(&local->chanctx_mtx);
3853
3854 rtnl_lock();
3855 ieee80211_dfs_cac_cancel(local);
3856 rtnl_unlock();
3857
3858 if (num_chanctx > 1)
3859 /* XXX: multi-channel is not supported yet */
3860 WARN_ON(1);
3861 else
3862 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3863 }
3864
3865 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3866 {
3867 struct ieee80211_local *local = hw_to_local(hw);
3868
3869 trace_api_radar_detected(local);
3870
3871 schedule_work(&local->radar_detected_work);
3872 }
3873 EXPORT_SYMBOL(ieee80211_radar_detected);
3874
3875 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3876 {
3877 u32 ret;
3878 int tmp;
3879
3880 switch (c->width) {
3881 case NL80211_CHAN_WIDTH_20:
3882 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3883 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3884 break;
3885 case NL80211_CHAN_WIDTH_40:
3886 c->width = NL80211_CHAN_WIDTH_20;
3887 c->center_freq1 = c->chan->center_freq;
3888 ret = IEEE80211_STA_DISABLE_40MHZ |
3889 IEEE80211_STA_DISABLE_VHT;
3890 break;
3891 case NL80211_CHAN_WIDTH_80:
3892 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3893 /* n_P40 */
3894 tmp /= 2;
3895 /* freq_P40 */
3896 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3897 c->width = NL80211_CHAN_WIDTH_40;
3898 ret = IEEE80211_STA_DISABLE_VHT;
3899 break;
3900 case NL80211_CHAN_WIDTH_80P80:
3901 c->center_freq2 = 0;
3902 c->width = NL80211_CHAN_WIDTH_80;
3903 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3904 IEEE80211_STA_DISABLE_160MHZ;
3905 break;
3906 case NL80211_CHAN_WIDTH_160:
3907 /* n_P20 */
3908 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3909 /* n_P80 */
3910 tmp /= 4;
3911 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3912 c->width = NL80211_CHAN_WIDTH_80;
3913 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3914 IEEE80211_STA_DISABLE_160MHZ;
3915 break;
3916 default:
3917 case NL80211_CHAN_WIDTH_20_NOHT:
3918 WARN_ON_ONCE(1);
3919 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3920 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3921 break;
3922 case NL80211_CHAN_WIDTH_1:
3923 case NL80211_CHAN_WIDTH_2:
3924 case NL80211_CHAN_WIDTH_4:
3925 case NL80211_CHAN_WIDTH_8:
3926 case NL80211_CHAN_WIDTH_16:
3927 case NL80211_CHAN_WIDTH_5:
3928 case NL80211_CHAN_WIDTH_10:
3929 WARN_ON_ONCE(1);
3930 /* keep c->width */
3931 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3932 break;
3933 }
3934
3935 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3936
3937 return ret;
3938 }
3939
3940 /*
3941 * Returns true if smps_mode_new is strictly more restrictive than
3942 * smps_mode_old.
3943 */
3944 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3945 enum ieee80211_smps_mode smps_mode_new)
3946 {
3947 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3948 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3949 return false;
3950
3951 switch (smps_mode_old) {
3952 case IEEE80211_SMPS_STATIC:
3953 return false;
3954 case IEEE80211_SMPS_DYNAMIC:
3955 return smps_mode_new == IEEE80211_SMPS_STATIC;
3956 case IEEE80211_SMPS_OFF:
3957 return smps_mode_new != IEEE80211_SMPS_OFF;
3958 default:
3959 WARN_ON(1);
3960 }
3961
3962 return false;
3963 }
3964
3965 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3966 struct cfg80211_csa_settings *csa_settings)
3967 {
3968 struct sk_buff *skb;
3969 struct ieee80211_mgmt *mgmt;
3970 struct ieee80211_local *local = sdata->local;
3971 int freq;
3972 int hdr_len = offsetofend(struct ieee80211_mgmt,
3973 u.action.u.chan_switch);
3974 u8 *pos;
3975
3976 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3977 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3978 return -EOPNOTSUPP;
3979
3980 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3981 5 + /* channel switch announcement element */
3982 3 + /* secondary channel offset element */
3983 5 + /* wide bandwidth channel switch announcement */
3984 8); /* mesh channel switch parameters element */
3985 if (!skb)
3986 return -ENOMEM;
3987
3988 skb_reserve(skb, local->tx_headroom);
3989 mgmt = skb_put_zero(skb, hdr_len);
3990 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3991 IEEE80211_STYPE_ACTION);
3992
3993 eth_broadcast_addr(mgmt->da);
3994 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3995 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3996 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3997 } else {
3998 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3999 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4000 }
4001 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4002 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4003 pos = skb_put(skb, 5);
4004 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
4005 *pos++ = 3; /* IE length */
4006 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
4007 freq = csa_settings->chandef.chan->center_freq;
4008 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
4009 *pos++ = csa_settings->count; /* count */
4010
4011 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4012 enum nl80211_channel_type ch_type;
4013
4014 skb_put(skb, 3);
4015 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
4016 *pos++ = 1; /* IE length */
4017 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4018 if (ch_type == NL80211_CHAN_HT40PLUS)
4019 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4020 else
4021 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4022 }
4023
4024 if (ieee80211_vif_is_mesh(&sdata->vif)) {
4025 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4026
4027 skb_put(skb, 8);
4028 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
4029 *pos++ = 6; /* IE length */
4030 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
4031 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
4032 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4033 *pos++ |= csa_settings->block_tx ?
4034 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4035 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4036 pos += 2;
4037 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4038 pos += 2;
4039 }
4040
4041 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4042 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4043 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4044 skb_put(skb, 5);
4045 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4046 }
4047
4048 ieee80211_tx_skb(sdata, skb);
4049 return 0;
4050 }
4051
4052 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4053 {
4054 return !(cs == NULL || cs->cipher == 0 ||
4055 cs->hdr_len < cs->pn_len + cs->pn_off ||
4056 cs->hdr_len <= cs->key_idx_off ||
4057 cs->key_idx_shift > 7 ||
4058 cs->key_idx_mask == 0);
4059 }
4060
4061 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4062 {
4063 int i;
4064
4065 /* Ensure we have enough iftype bitmap space for all iftype values */
4066 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4067
4068 for (i = 0; i < n; i++)
4069 if (!ieee80211_cs_valid(&cs[i]))
4070 return false;
4071
4072 return true;
4073 }
4074
4075 const struct ieee80211_cipher_scheme *
4076 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4077 enum nl80211_iftype iftype)
4078 {
4079 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4080 int n = local->hw.n_cipher_schemes;
4081 int i;
4082 const struct ieee80211_cipher_scheme *cs = NULL;
4083
4084 for (i = 0; i < n; i++) {
4085 if (l[i].cipher == cipher) {
4086 cs = &l[i];
4087 break;
4088 }
4089 }
4090
4091 if (!cs || !(cs->iftype & BIT(iftype)))
4092 return NULL;
4093
4094 return cs;
4095 }
4096
4097 int ieee80211_cs_headroom(struct ieee80211_local *local,
4098 struct cfg80211_crypto_settings *crypto,
4099 enum nl80211_iftype iftype)
4100 {
4101 const struct ieee80211_cipher_scheme *cs;
4102 int headroom = IEEE80211_ENCRYPT_HEADROOM;
4103 int i;
4104
4105 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4106 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4107 iftype);
4108
4109 if (cs && headroom < cs->hdr_len)
4110 headroom = cs->hdr_len;
4111 }
4112
4113 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4114 if (cs && headroom < cs->hdr_len)
4115 headroom = cs->hdr_len;
4116
4117 return headroom;
4118 }
4119
4120 static bool
4121 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4122 {
4123 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4124 int skip;
4125
4126 if (end > 0)
4127 return false;
4128
4129 /* One shot NOA */
4130 if (data->count[i] == 1)
4131 return false;
4132
4133 if (data->desc[i].interval == 0)
4134 return false;
4135
4136 /* End time is in the past, check for repetitions */
4137 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4138 if (data->count[i] < 255) {
4139 if (data->count[i] <= skip) {
4140 data->count[i] = 0;
4141 return false;
4142 }
4143
4144 data->count[i] -= skip;
4145 }
4146
4147 data->desc[i].start += skip * data->desc[i].interval;
4148
4149 return true;
4150 }
4151
4152 static bool
4153 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4154 s32 *offset)
4155 {
4156 bool ret = false;
4157 int i;
4158
4159 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4160 s32 cur;
4161
4162 if (!data->count[i])
4163 continue;
4164
4165 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4166 ret = true;
4167
4168 cur = data->desc[i].start - tsf;
4169 if (cur > *offset)
4170 continue;
4171
4172 cur = data->desc[i].start + data->desc[i].duration - tsf;
4173 if (cur > *offset)
4174 *offset = cur;
4175 }
4176
4177 return ret;
4178 }
4179
4180 static u32
4181 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4182 {
4183 s32 offset = 0;
4184 int tries = 0;
4185 /*
4186 * arbitrary limit, used to avoid infinite loops when combined NoA
4187 * descriptors cover the full time period.
4188 */
4189 int max_tries = 5;
4190
4191 ieee80211_extend_absent_time(data, tsf, &offset);
4192 do {
4193 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4194 break;
4195
4196 tries++;
4197 } while (tries < max_tries);
4198
4199 return offset;
4200 }
4201
4202 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4203 {
4204 u32 next_offset = BIT(31) - 1;
4205 int i;
4206
4207 data->absent = 0;
4208 data->has_next_tsf = false;
4209 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4210 s32 start;
4211
4212 if (!data->count[i])
4213 continue;
4214
4215 ieee80211_extend_noa_desc(data, tsf, i);
4216 start = data->desc[i].start - tsf;
4217 if (start <= 0)
4218 data->absent |= BIT(i);
4219
4220 if (next_offset > start)
4221 next_offset = start;
4222
4223 data->has_next_tsf = true;
4224 }
4225
4226 if (data->absent)
4227 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4228
4229 data->next_tsf = tsf + next_offset;
4230 }
4231 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4232
4233 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4234 struct ieee80211_noa_data *data, u32 tsf)
4235 {
4236 int ret = 0;
4237 int i;
4238
4239 memset(data, 0, sizeof(*data));
4240
4241 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4242 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4243
4244 if (!desc->count || !desc->duration)
4245 continue;
4246
4247 data->count[i] = desc->count;
4248 data->desc[i].start = le32_to_cpu(desc->start_time);
4249 data->desc[i].duration = le32_to_cpu(desc->duration);
4250 data->desc[i].interval = le32_to_cpu(desc->interval);
4251
4252 if (data->count[i] > 1 &&
4253 data->desc[i].interval < data->desc[i].duration)
4254 continue;
4255
4256 ieee80211_extend_noa_desc(data, tsf, i);
4257 ret++;
4258 }
4259
4260 if (ret)
4261 ieee80211_update_p2p_noa(data, tsf);
4262
4263 return ret;
4264 }
4265 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4266
4267 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4268 struct ieee80211_sub_if_data *sdata)
4269 {
4270 u64 tsf = drv_get_tsf(local, sdata);
4271 u64 dtim_count = 0;
4272 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4273 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4274 struct ps_data *ps;
4275 u8 bcns_from_dtim;
4276
4277 if (tsf == -1ULL || !beacon_int || !dtim_period)
4278 return;
4279
4280 if (sdata->vif.type == NL80211_IFTYPE_AP ||
4281 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4282 if (!sdata->bss)
4283 return;
4284
4285 ps = &sdata->bss->ps;
4286 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4287 ps = &sdata->u.mesh.ps;
4288 } else {
4289 return;
4290 }
4291
4292 /*
4293 * actually finds last dtim_count, mac80211 will update in
4294 * __beacon_add_tim().
4295 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4296 */
4297 do_div(tsf, beacon_int);
4298 bcns_from_dtim = do_div(tsf, dtim_period);
4299 /* just had a DTIM */
4300 if (!bcns_from_dtim)
4301 dtim_count = 0;
4302 else
4303 dtim_count = dtim_period - bcns_from_dtim;
4304
4305 ps->dtim_count = dtim_count;
4306 }
4307
4308 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4309 struct ieee80211_chanctx *ctx)
4310 {
4311 struct ieee80211_sub_if_data *sdata;
4312 u8 radar_detect = 0;
4313
4314 lockdep_assert_held(&local->chanctx_mtx);
4315
4316 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4317 return 0;
4318
4319 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4320 if (sdata->reserved_radar_required)
4321 radar_detect |= BIT(sdata->reserved_chandef.width);
4322
4323 /*
4324 * An in-place reservation context should not have any assigned vifs
4325 * until it replaces the other context.
4326 */
4327 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4328 !list_empty(&ctx->assigned_vifs));
4329
4330 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4331 if (sdata->radar_required)
4332 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4333
4334 return radar_detect;
4335 }
4336
4337 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4338 const struct cfg80211_chan_def *chandef,
4339 enum ieee80211_chanctx_mode chanmode,
4340 u8 radar_detect)
4341 {
4342 struct ieee80211_local *local = sdata->local;
4343 struct ieee80211_sub_if_data *sdata_iter;
4344 enum nl80211_iftype iftype = sdata->wdev.iftype;
4345 struct ieee80211_chanctx *ctx;
4346 int total = 1;
4347 struct iface_combination_params params = {
4348 .radar_detect = radar_detect,
4349 };
4350
4351 lockdep_assert_held(&local->chanctx_mtx);
4352
4353 if (WARN_ON(hweight32(radar_detect) > 1))
4354 return -EINVAL;
4355
4356 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4357 !chandef->chan))
4358 return -EINVAL;
4359
4360 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4361 return -EINVAL;
4362
4363 if (sdata->vif.type == NL80211_IFTYPE_AP ||
4364 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4365 /*
4366 * always passing this is harmless, since it'll be the
4367 * same value that cfg80211 finds if it finds the same
4368 * interface ... and that's always allowed
4369 */
4370 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4371 }
4372
4373 /* Always allow software iftypes */
4374 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4375 if (radar_detect)
4376 return -EINVAL;
4377 return 0;
4378 }
4379
4380 if (chandef)
4381 params.num_different_channels = 1;
4382
4383 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4384 params.iftype_num[iftype] = 1;
4385
4386 list_for_each_entry(ctx, &local->chanctx_list, list) {
4387 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4388 continue;
4389 params.radar_detect |=
4390 ieee80211_chanctx_radar_detect(local, ctx);
4391 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4392 params.num_different_channels++;
4393 continue;
4394 }
4395 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4396 cfg80211_chandef_compatible(chandef,
4397 &ctx->conf.def))
4398 continue;
4399 params.num_different_channels++;
4400 }
4401
4402 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4403 struct wireless_dev *wdev_iter;
4404
4405 wdev_iter = &sdata_iter->wdev;
4406
4407 if (sdata_iter == sdata ||
4408 !ieee80211_sdata_running(sdata_iter) ||
4409 cfg80211_iftype_allowed(local->hw.wiphy,
4410 wdev_iter->iftype, 0, 1))
4411 continue;
4412
4413 params.iftype_num[wdev_iter->iftype]++;
4414 total++;
4415 }
4416
4417 if (total == 1 && !params.radar_detect)
4418 return 0;
4419
4420 return cfg80211_check_combinations(local->hw.wiphy, &params);
4421 }
4422
4423 static void
4424 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4425 void *data)
4426 {
4427 u32 *max_num_different_channels = data;
4428
4429 *max_num_different_channels = max(*max_num_different_channels,
4430 c->num_different_channels);
4431 }
4432
4433 int ieee80211_max_num_channels(struct ieee80211_local *local)
4434 {
4435 struct ieee80211_sub_if_data *sdata;
4436 struct ieee80211_chanctx *ctx;
4437 u32 max_num_different_channels = 1;
4438 int err;
4439 struct iface_combination_params params = {0};
4440
4441 lockdep_assert_held(&local->chanctx_mtx);
4442
4443 list_for_each_entry(ctx, &local->chanctx_list, list) {
4444 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4445 continue;
4446
4447 params.num_different_channels++;
4448
4449 params.radar_detect |=
4450 ieee80211_chanctx_radar_detect(local, ctx);
4451 }
4452
4453 list_for_each_entry_rcu(sdata, &local->interfaces, list)
4454 params.iftype_num[sdata->wdev.iftype]++;
4455
4456 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4457 ieee80211_iter_max_chans,
4458 &max_num_different_channels);
4459 if (err < 0)
4460 return err;
4461
4462 return max_num_different_channels;
4463 }
4464
4465 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4466 struct ieee80211_sta_s1g_cap *caps,
4467 struct sk_buff *skb)
4468 {
4469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4470 struct ieee80211_s1g_cap s1g_capab;
4471 u8 *pos;
4472 int i;
4473
4474 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4475 return;
4476
4477 if (!caps->s1g)
4478 return;
4479
4480 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4481 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4482
4483 /* override the capability info */
4484 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4485 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4486
4487 s1g_capab.capab_info[i] &= ~mask;
4488 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4489 }
4490
4491 /* then MCS and NSS set */
4492 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4493 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4494
4495 s1g_capab.supp_mcs_nss[i] &= ~mask;
4496 s1g_capab.supp_mcs_nss[i] |=
4497 ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4498 }
4499
4500 pos = skb_put(skb, 2 + sizeof(s1g_capab));
4501 *pos++ = WLAN_EID_S1G_CAPABILITIES;
4502 *pos++ = sizeof(s1g_capab);
4503
4504 memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4505 }
4506
4507 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4508 struct sk_buff *skb)
4509 {
4510 u8 *pos = skb_put(skb, 3);
4511
4512 *pos++ = WLAN_EID_AID_REQUEST;
4513 *pos++ = 1;
4514 *pos++ = 0;
4515 }
4516
4517 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4518 {
4519 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4520 *buf++ = 7; /* len */
4521 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4522 *buf++ = 0x50;
4523 *buf++ = 0xf2;
4524 *buf++ = 2; /* WME */
4525 *buf++ = 0; /* WME info */
4526 *buf++ = 1; /* WME ver */
4527 *buf++ = qosinfo; /* U-APSD no in use */
4528
4529 return buf;
4530 }
4531
4532 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4533 unsigned long *frame_cnt,
4534 unsigned long *byte_cnt)
4535 {
4536 struct txq_info *txqi = to_txq_info(txq);
4537 u32 frag_cnt = 0, frag_bytes = 0;
4538 struct sk_buff *skb;
4539
4540 skb_queue_walk(&txqi->frags, skb) {
4541 frag_cnt++;
4542 frag_bytes += skb->len;
4543 }
4544
4545 if (frame_cnt)
4546 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4547
4548 if (byte_cnt)
4549 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4550 }
4551 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4552
4553 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4554 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4555 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4556 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4557 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4558 };
4559
4560 u16 ieee80211_encode_usf(int listen_interval)
4561 {
4562 static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4563 u16 ui, usf = 0;
4564
4565 /* find greatest USF */
4566 while (usf < IEEE80211_MAX_USF) {
4567 if (listen_interval % listen_int_usf[usf + 1])
4568 break;
4569 usf += 1;
4570 }
4571 ui = listen_interval / listen_int_usf[usf];
4572
4573 /* error if there is a remainder. Should've been checked by user */
4574 WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4575 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4576 FIELD_PREP(LISTEN_INT_UI, ui);
4577
4578 return (u16) listen_interval;
4579 }
Linux with added FPC-III support