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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2015-2017 Intel Deutschland GmbH
9 * Copyright (C) 2018-2024 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#include <kunit/visibility.h>
28
29#include "ieee80211_i.h"
30#include "driver-ops.h"
31#include "rate.h"
32#include "mesh.h"
33#include "wme.h"
34#include "led.h"
35#include "wep.h"
36
37/* privid for wiphys to determine whether they belong to us or not */
38const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39
40struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41{
42 struct ieee80211_local *local;
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49const struct ieee80211_conn_settings ieee80211_conn_settings_unlimited = {
50 .mode = IEEE80211_CONN_MODE_EHT,
51 .bw_limit = IEEE80211_CONN_BW_LIMIT_320,
52};
53
54u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
55 enum nl80211_iftype type)
56{
57 __le16 fc = hdr->frame_control;
58
59 if (ieee80211_is_data(fc)) {
60 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
62
63 if (ieee80211_has_a4(fc))
64 return NULL;
65 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
68 return hdr->addr2;
69
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_s1g_beacon(fc)) {
74 struct ieee80211_ext *ext = (void *) hdr;
75
76 return ext->u.s1g_beacon.sa;
77 }
78
79 if (ieee80211_is_mgmt(fc)) {
80 if (len < 24) /* drop incorrect hdr len (mgmt) */
81 return NULL;
82 return hdr->addr3;
83 }
84
85 if (ieee80211_is_ctl(fc)) {
86 if (ieee80211_is_pspoll(fc))
87 return hdr->addr1;
88
89 if (ieee80211_is_back_req(fc)) {
90 switch (type) {
91 case NL80211_IFTYPE_STATION:
92 return hdr->addr2;
93 case NL80211_IFTYPE_AP:
94 case NL80211_IFTYPE_AP_VLAN:
95 return hdr->addr1;
96 default:
97 break; /* fall through to the return */
98 }
99 }
100 }
101
102 return NULL;
103}
104EXPORT_SYMBOL(ieee80211_get_bssid);
105
106void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
107{
108 struct sk_buff *skb;
109 struct ieee80211_hdr *hdr;
110
111 skb_queue_walk(&tx->skbs, skb) {
112 hdr = (struct ieee80211_hdr *) skb->data;
113 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
114 }
115}
116
117int ieee80211_frame_duration(enum nl80211_band band, size_t len,
118 int rate, int erp, int short_preamble)
119{
120 int dur;
121
122 /* calculate duration (in microseconds, rounded up to next higher
123 * integer if it includes a fractional microsecond) to send frame of
124 * len bytes (does not include FCS) at the given rate. Duration will
125 * also include SIFS.
126 *
127 * rate is in 100 kbps, so divident is multiplied by 10 in the
128 * DIV_ROUND_UP() operations.
129 */
130
131 if (band == NL80211_BAND_5GHZ || erp) {
132 /*
133 * OFDM:
134 *
135 * N_DBPS = DATARATE x 4
136 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
137 * (16 = SIGNAL time, 6 = tail bits)
138 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
139 *
140 * T_SYM = 4 usec
141 * 802.11a - 18.5.2: aSIFSTime = 16 usec
142 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
143 * signal ext = 6 usec
144 */
145 dur = 16; /* SIFS + signal ext */
146 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
147 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
148
149 /* rates should already consider the channel bandwidth,
150 * don't apply divisor again.
151 */
152 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
153 4 * rate); /* T_SYM x N_SYM */
154 } else {
155 /*
156 * 802.11b or 802.11g with 802.11b compatibility:
157 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
158 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
159 *
160 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
161 * aSIFSTime = 10 usec
162 * aPreambleLength = 144 usec or 72 usec with short preamble
163 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
164 */
165 dur = 10; /* aSIFSTime = 10 usec */
166 dur += short_preamble ? (72 + 24) : (144 + 48);
167
168 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
169 }
170
171 return dur;
172}
173
174/* Exported duration function for driver use */
175__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
176 struct ieee80211_vif *vif,
177 enum nl80211_band band,
178 size_t frame_len,
179 struct ieee80211_rate *rate)
180{
181 struct ieee80211_sub_if_data *sdata;
182 u16 dur;
183 int erp;
184 bool short_preamble = false;
185
186 erp = 0;
187 if (vif) {
188 sdata = vif_to_sdata(vif);
189 short_preamble = sdata->vif.bss_conf.use_short_preamble;
190 if (sdata->deflink.operating_11g_mode)
191 erp = rate->flags & IEEE80211_RATE_ERP_G;
192 }
193
194 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
195 short_preamble);
196
197 return cpu_to_le16(dur);
198}
199EXPORT_SYMBOL(ieee80211_generic_frame_duration);
200
201__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif, size_t frame_len,
203 const struct ieee80211_tx_info *frame_txctl)
204{
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
208 bool short_preamble;
209 int erp, bitrate;
210 u16 dur;
211 struct ieee80211_supported_band *sband;
212
213 sband = local->hw.wiphy->bands[frame_txctl->band];
214
215 short_preamble = false;
216
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
218
219 erp = 0;
220 if (vif) {
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->deflink.operating_11g_mode)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 }
226
227 bitrate = rate->bitrate;
228
229 /* CTS duration */
230 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
231 erp, short_preamble);
232 /* Data frame duration */
233 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
234 erp, short_preamble);
235 /* ACK duration */
236 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
237 erp, short_preamble);
238
239 return cpu_to_le16(dur);
240}
241EXPORT_SYMBOL(ieee80211_rts_duration);
242
243__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
244 struct ieee80211_vif *vif,
245 size_t frame_len,
246 const struct ieee80211_tx_info *frame_txctl)
247{
248 struct ieee80211_local *local = hw_to_local(hw);
249 struct ieee80211_rate *rate;
250 struct ieee80211_sub_if_data *sdata;
251 bool short_preamble;
252 int erp, bitrate;
253 u16 dur;
254 struct ieee80211_supported_band *sband;
255
256 sband = local->hw.wiphy->bands[frame_txctl->band];
257
258 short_preamble = false;
259
260 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
261 erp = 0;
262 if (vif) {
263 sdata = vif_to_sdata(vif);
264 short_preamble = sdata->vif.bss_conf.use_short_preamble;
265 if (sdata->deflink.operating_11g_mode)
266 erp = rate->flags & IEEE80211_RATE_ERP_G;
267 }
268
269 bitrate = rate->bitrate;
270
271 /* Data frame duration */
272 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
273 erp, short_preamble);
274 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
275 /* ACK duration */
276 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
277 erp, short_preamble);
278 }
279
280 return cpu_to_le16(dur);
281}
282EXPORT_SYMBOL(ieee80211_ctstoself_duration);
283
284static void wake_tx_push_queue(struct ieee80211_local *local,
285 struct ieee80211_sub_if_data *sdata,
286 struct ieee80211_txq *queue)
287{
288 struct ieee80211_tx_control control = {
289 .sta = queue->sta,
290 };
291 struct sk_buff *skb;
292
293 while (1) {
294 skb = ieee80211_tx_dequeue(&local->hw, queue);
295 if (!skb)
296 break;
297
298 drv_tx(local, &control, skb);
299 }
300}
301
302/* wake_tx_queue handler for driver not implementing a custom one*/
303void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
304 struct ieee80211_txq *txq)
305{
306 struct ieee80211_local *local = hw_to_local(hw);
307 struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
308 struct ieee80211_txq *queue;
309
310 spin_lock(&local->handle_wake_tx_queue_lock);
311
312 /* Use ieee80211_next_txq() for airtime fairness accounting */
313 ieee80211_txq_schedule_start(hw, txq->ac);
314 while ((queue = ieee80211_next_txq(hw, txq->ac))) {
315 wake_tx_push_queue(local, sdata, queue);
316 ieee80211_return_txq(hw, queue, false);
317 }
318 ieee80211_txq_schedule_end(hw, txq->ac);
319 spin_unlock(&local->handle_wake_tx_queue_lock);
320}
321EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue);
322
323static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
324{
325 struct ieee80211_local *local = sdata->local;
326 struct ieee80211_vif *vif = &sdata->vif;
327 struct fq *fq = &local->fq;
328 struct ps_data *ps = NULL;
329 struct txq_info *txqi;
330 struct sta_info *sta;
331 int i;
332
333 local_bh_disable();
334 spin_lock(&fq->lock);
335
336 if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
337 goto out;
338
339 if (sdata->vif.type == NL80211_IFTYPE_AP)
340 ps = &sdata->bss->ps;
341
342 list_for_each_entry_rcu(sta, &local->sta_list, list) {
343 if (sdata != sta->sdata)
344 continue;
345
346 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
347 struct ieee80211_txq *txq = sta->sta.txq[i];
348
349 if (!txq)
350 continue;
351
352 txqi = to_txq_info(txq);
353
354 if (ac != txq->ac)
355 continue;
356
357 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY,
358 &txqi->flags))
359 continue;
360
361 spin_unlock(&fq->lock);
362 drv_wake_tx_queue(local, txqi);
363 spin_lock(&fq->lock);
364 }
365 }
366
367 if (!vif->txq)
368 goto out;
369
370 txqi = to_txq_info(vif->txq);
371
372 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) ||
373 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
374 goto out;
375
376 spin_unlock(&fq->lock);
377
378 drv_wake_tx_queue(local, txqi);
379 local_bh_enable();
380 return;
381out:
382 spin_unlock(&fq->lock);
383 local_bh_enable();
384}
385
386static void
387__releases(&local->queue_stop_reason_lock)
388__acquires(&local->queue_stop_reason_lock)
389_ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
390{
391 struct ieee80211_sub_if_data *sdata;
392 int n_acs = IEEE80211_NUM_ACS;
393 int i;
394
395 rcu_read_lock();
396
397 if (local->hw.queues < IEEE80211_NUM_ACS)
398 n_acs = 1;
399
400 for (i = 0; i < local->hw.queues; i++) {
401 if (local->queue_stop_reasons[i])
402 continue;
403
404 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
405 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
406 int ac;
407
408 for (ac = 0; ac < n_acs; ac++) {
409 int ac_queue = sdata->vif.hw_queue[ac];
410
411 if (ac_queue == i ||
412 sdata->vif.cab_queue == i)
413 __ieee80211_wake_txqs(sdata, ac);
414 }
415 }
416 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
417 }
418
419 rcu_read_unlock();
420}
421
422void ieee80211_wake_txqs(struct tasklet_struct *t)
423{
424 struct ieee80211_local *local = from_tasklet(local, t,
425 wake_txqs_tasklet);
426 unsigned long flags;
427
428 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
429 _ieee80211_wake_txqs(local, &flags);
430 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
431}
432
433static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
434 enum queue_stop_reason reason,
435 bool refcounted,
436 unsigned long *flags)
437{
438 struct ieee80211_local *local = hw_to_local(hw);
439
440 trace_wake_queue(local, queue, reason);
441
442 if (WARN_ON(queue >= hw->queues))
443 return;
444
445 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
446 return;
447
448 if (!refcounted) {
449 local->q_stop_reasons[queue][reason] = 0;
450 } else {
451 local->q_stop_reasons[queue][reason]--;
452 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
453 local->q_stop_reasons[queue][reason] = 0;
454 }
455
456 if (local->q_stop_reasons[queue][reason] == 0)
457 __clear_bit(reason, &local->queue_stop_reasons[queue]);
458
459 if (local->queue_stop_reasons[queue] != 0)
460 /* someone still has this queue stopped */
461 return;
462
463 if (!skb_queue_empty(&local->pending[queue]))
464 tasklet_schedule(&local->tx_pending_tasklet);
465
466 /*
467 * Calling _ieee80211_wake_txqs here can be a problem because it may
468 * release queue_stop_reason_lock which has been taken by
469 * __ieee80211_wake_queue's caller. It is certainly not very nice to
470 * release someone's lock, but it is fine because all the callers of
471 * __ieee80211_wake_queue call it right before releasing the lock.
472 */
473 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
474 tasklet_schedule(&local->wake_txqs_tasklet);
475 else
476 _ieee80211_wake_txqs(local, flags);
477}
478
479void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
480 enum queue_stop_reason reason,
481 bool refcounted)
482{
483 struct ieee80211_local *local = hw_to_local(hw);
484 unsigned long flags;
485
486 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489}
490
491void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
492{
493 ieee80211_wake_queue_by_reason(hw, queue,
494 IEEE80211_QUEUE_STOP_REASON_DRIVER,
495 false);
496}
497EXPORT_SYMBOL(ieee80211_wake_queue);
498
499static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
500 enum queue_stop_reason reason,
501 bool refcounted)
502{
503 struct ieee80211_local *local = hw_to_local(hw);
504
505 trace_stop_queue(local, queue, reason);
506
507 if (WARN_ON(queue >= hw->queues))
508 return;
509
510 if (!refcounted)
511 local->q_stop_reasons[queue][reason] = 1;
512 else
513 local->q_stop_reasons[queue][reason]++;
514
515 set_bit(reason, &local->queue_stop_reasons[queue]);
516}
517
518void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
519 enum queue_stop_reason reason,
520 bool refcounted)
521{
522 struct ieee80211_local *local = hw_to_local(hw);
523 unsigned long flags;
524
525 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
526 __ieee80211_stop_queue(hw, queue, reason, refcounted);
527 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
528}
529
530void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
531{
532 ieee80211_stop_queue_by_reason(hw, queue,
533 IEEE80211_QUEUE_STOP_REASON_DRIVER,
534 false);
535}
536EXPORT_SYMBOL(ieee80211_stop_queue);
537
538void ieee80211_add_pending_skb(struct ieee80211_local *local,
539 struct sk_buff *skb)
540{
541 struct ieee80211_hw *hw = &local->hw;
542 unsigned long flags;
543 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
544 int queue = info->hw_queue;
545
546 if (WARN_ON(!info->control.vif)) {
547 ieee80211_free_txskb(&local->hw, skb);
548 return;
549 }
550
551 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
552 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
553 false);
554 __skb_queue_tail(&local->pending[queue], skb);
555 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
556 false, &flags);
557 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
558}
559
560void ieee80211_add_pending_skbs(struct ieee80211_local *local,
561 struct sk_buff_head *skbs)
562{
563 struct ieee80211_hw *hw = &local->hw;
564 struct sk_buff *skb;
565 unsigned long flags;
566 int queue, i;
567
568 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
569 while ((skb = skb_dequeue(skbs))) {
570 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
571
572 if (WARN_ON(!info->control.vif)) {
573 ieee80211_free_txskb(&local->hw, skb);
574 continue;
575 }
576
577 queue = info->hw_queue;
578
579 __ieee80211_stop_queue(hw, queue,
580 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
581 false);
582
583 __skb_queue_tail(&local->pending[queue], skb);
584 }
585
586 for (i = 0; i < hw->queues; i++)
587 __ieee80211_wake_queue(hw, i,
588 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
589 false, &flags);
590 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
591}
592
593void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
594 unsigned long queues,
595 enum queue_stop_reason reason,
596 bool refcounted)
597{
598 struct ieee80211_local *local = hw_to_local(hw);
599 unsigned long flags;
600 int i;
601
602 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
603
604 for_each_set_bit(i, &queues, hw->queues)
605 __ieee80211_stop_queue(hw, i, reason, refcounted);
606
607 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
608}
609
610void ieee80211_stop_queues(struct ieee80211_hw *hw)
611{
612 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
613 IEEE80211_QUEUE_STOP_REASON_DRIVER,
614 false);
615}
616EXPORT_SYMBOL(ieee80211_stop_queues);
617
618int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
619{
620 struct ieee80211_local *local = hw_to_local(hw);
621 unsigned long flags;
622 int ret;
623
624 if (WARN_ON(queue >= hw->queues))
625 return true;
626
627 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
628 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
629 &local->queue_stop_reasons[queue]);
630 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
631 return ret;
632}
633EXPORT_SYMBOL(ieee80211_queue_stopped);
634
635void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
636 unsigned long queues,
637 enum queue_stop_reason reason,
638 bool refcounted)
639{
640 struct ieee80211_local *local = hw_to_local(hw);
641 unsigned long flags;
642 int i;
643
644 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
645
646 for_each_set_bit(i, &queues, hw->queues)
647 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
648
649 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
650}
651
652void ieee80211_wake_queues(struct ieee80211_hw *hw)
653{
654 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
655 IEEE80211_QUEUE_STOP_REASON_DRIVER,
656 false);
657}
658EXPORT_SYMBOL(ieee80211_wake_queues);
659
660unsigned int
661ieee80211_get_vif_queues(struct ieee80211_local *local,
662 struct ieee80211_sub_if_data *sdata)
663{
664 unsigned int queues;
665
666 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
667 int ac;
668
669 queues = 0;
670
671 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
672 if (sdata->vif.hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
673 queues |= BIT(sdata->vif.hw_queue[ac]);
674 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
675 queues |= BIT(sdata->vif.cab_queue);
676 } else {
677 /* all queues */
678 queues = BIT(local->hw.queues) - 1;
679 }
680
681 return queues;
682}
683
684void __ieee80211_flush_queues(struct ieee80211_local *local,
685 struct ieee80211_sub_if_data *sdata,
686 unsigned int queues, bool drop)
687{
688 if (!local->ops->flush)
689 return;
690
691 /*
692 * If no queue was set, or if the HW doesn't support
693 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
694 */
695 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
696 queues = ieee80211_get_vif_queues(local, sdata);
697
698 ieee80211_stop_queues_by_reason(&local->hw, queues,
699 IEEE80211_QUEUE_STOP_REASON_FLUSH,
700 false);
701
702 if (drop) {
703 struct sta_info *sta;
704
705 /* Purge the queues, so the frames on them won't be
706 * sent during __ieee80211_wake_queue()
707 */
708 list_for_each_entry(sta, &local->sta_list, list) {
709 if (sdata != sta->sdata)
710 continue;
711 ieee80211_purge_sta_txqs(sta);
712 }
713 }
714
715 drv_flush(local, sdata, queues, drop);
716
717 ieee80211_wake_queues_by_reason(&local->hw, queues,
718 IEEE80211_QUEUE_STOP_REASON_FLUSH,
719 false);
720}
721
722void ieee80211_flush_queues(struct ieee80211_local *local,
723 struct ieee80211_sub_if_data *sdata, bool drop)
724{
725 __ieee80211_flush_queues(local, sdata, 0, drop);
726}
727
728static void __iterate_interfaces(struct ieee80211_local *local,
729 u32 iter_flags,
730 void (*iterator)(void *data, u8 *mac,
731 struct ieee80211_vif *vif),
732 void *data)
733{
734 struct ieee80211_sub_if_data *sdata;
735 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
736
737 list_for_each_entry_rcu(sdata, &local->interfaces, list,
738 lockdep_is_held(&local->iflist_mtx) ||
739 lockdep_is_held(&local->hw.wiphy->mtx)) {
740 switch (sdata->vif.type) {
741 case NL80211_IFTYPE_MONITOR:
742 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
743 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
744 continue;
745 break;
746 case NL80211_IFTYPE_AP_VLAN:
747 continue;
748 default:
749 break;
750 }
751 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
752 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
753 continue;
754 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
755 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
756 continue;
757 if (ieee80211_sdata_running(sdata) || !active_only)
758 iterator(data, sdata->vif.addr,
759 &sdata->vif);
760 }
761
762 sdata = rcu_dereference_check(local->monitor_sdata,
763 lockdep_is_held(&local->iflist_mtx) ||
764 lockdep_is_held(&local->hw.wiphy->mtx));
765 if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
766 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
767 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
768 iterator(data, sdata->vif.addr, &sdata->vif);
769}
770
771void ieee80211_iterate_interfaces(
772 struct ieee80211_hw *hw, u32 iter_flags,
773 void (*iterator)(void *data, u8 *mac,
774 struct ieee80211_vif *vif),
775 void *data)
776{
777 struct ieee80211_local *local = hw_to_local(hw);
778
779 mutex_lock(&local->iflist_mtx);
780 __iterate_interfaces(local, iter_flags, iterator, data);
781 mutex_unlock(&local->iflist_mtx);
782}
783EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
784
785void ieee80211_iterate_active_interfaces_atomic(
786 struct ieee80211_hw *hw, u32 iter_flags,
787 void (*iterator)(void *data, u8 *mac,
788 struct ieee80211_vif *vif),
789 void *data)
790{
791 struct ieee80211_local *local = hw_to_local(hw);
792
793 rcu_read_lock();
794 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
795 iterator, data);
796 rcu_read_unlock();
797}
798EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
799
800void ieee80211_iterate_active_interfaces_mtx(
801 struct ieee80211_hw *hw, u32 iter_flags,
802 void (*iterator)(void *data, u8 *mac,
803 struct ieee80211_vif *vif),
804 void *data)
805{
806 struct ieee80211_local *local = hw_to_local(hw);
807
808 lockdep_assert_wiphy(hw->wiphy);
809
810 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
811 iterator, data);
812}
813EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
814
815static void __iterate_stations(struct ieee80211_local *local,
816 void (*iterator)(void *data,
817 struct ieee80211_sta *sta),
818 void *data)
819{
820 struct sta_info *sta;
821
822 list_for_each_entry_rcu(sta, &local->sta_list, list,
823 lockdep_is_held(&local->hw.wiphy->mtx)) {
824 if (!sta->uploaded)
825 continue;
826
827 iterator(data, &sta->sta);
828 }
829}
830
831void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
832 void (*iterator)(void *data,
833 struct ieee80211_sta *sta),
834 void *data)
835{
836 struct ieee80211_local *local = hw_to_local(hw);
837
838 rcu_read_lock();
839 __iterate_stations(local, iterator, data);
840 rcu_read_unlock();
841}
842EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
843
844void ieee80211_iterate_stations_mtx(struct ieee80211_hw *hw,
845 void (*iterator)(void *data,
846 struct ieee80211_sta *sta),
847 void *data)
848{
849 struct ieee80211_local *local = hw_to_local(hw);
850
851 lockdep_assert_wiphy(local->hw.wiphy);
852
853 __iterate_stations(local, iterator, data);
854}
855EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_mtx);
856
857struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
858{
859 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
860
861 if (!ieee80211_sdata_running(sdata) ||
862 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
863 return NULL;
864 return &sdata->vif;
865}
866EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
867
868struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
869{
870 if (!vif)
871 return NULL;
872
873 return &vif_to_sdata(vif)->wdev;
874}
875EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
876
877/*
878 * Nothing should have been stuffed into the workqueue during
879 * the suspend->resume cycle. Since we can't check each caller
880 * of this function if we are already quiescing / suspended,
881 * check here and don't WARN since this can actually happen when
882 * the rx path (for example) is racing against __ieee80211_suspend
883 * and suspending / quiescing was set after the rx path checked
884 * them.
885 */
886static bool ieee80211_can_queue_work(struct ieee80211_local *local)
887{
888 if (local->quiescing || (local->suspended && !local->resuming)) {
889 pr_warn("queueing ieee80211 work while going to suspend\n");
890 return false;
891 }
892
893 return true;
894}
895
896void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
897{
898 struct ieee80211_local *local = hw_to_local(hw);
899
900 if (!ieee80211_can_queue_work(local))
901 return;
902
903 queue_work(local->workqueue, work);
904}
905EXPORT_SYMBOL(ieee80211_queue_work);
906
907void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
908 struct delayed_work *dwork,
909 unsigned long delay)
910{
911 struct ieee80211_local *local = hw_to_local(hw);
912
913 if (!ieee80211_can_queue_work(local))
914 return;
915
916 queue_delayed_work(local->workqueue, dwork, delay);
917}
918EXPORT_SYMBOL(ieee80211_queue_delayed_work);
919
920void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
921 struct ieee80211_tx_queue_params
922 *qparam, int ac)
923{
924 struct ieee80211_chanctx_conf *chanctx_conf;
925 const struct ieee80211_reg_rule *rrule;
926 const struct ieee80211_wmm_ac *wmm_ac;
927 u16 center_freq = 0;
928
929 if (sdata->vif.type != NL80211_IFTYPE_AP &&
930 sdata->vif.type != NL80211_IFTYPE_STATION)
931 return;
932
933 rcu_read_lock();
934 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
935 if (chanctx_conf)
936 center_freq = chanctx_conf->def.chan->center_freq;
937
938 if (!center_freq) {
939 rcu_read_unlock();
940 return;
941 }
942
943 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
944
945 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
946 rcu_read_unlock();
947 return;
948 }
949
950 if (sdata->vif.type == NL80211_IFTYPE_AP)
951 wmm_ac = &rrule->wmm_rule.ap[ac];
952 else
953 wmm_ac = &rrule->wmm_rule.client[ac];
954 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
955 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
956 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
957 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
958 rcu_read_unlock();
959}
960
961void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
962 bool bss_notify, bool enable_qos)
963{
964 struct ieee80211_sub_if_data *sdata = link->sdata;
965 struct ieee80211_local *local = sdata->local;
966 struct ieee80211_tx_queue_params qparam;
967 struct ieee80211_chanctx_conf *chanctx_conf;
968 int ac;
969 bool use_11b;
970 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
971 int aCWmin, aCWmax;
972
973 if (!local->ops->conf_tx)
974 return;
975
976 if (local->hw.queues < IEEE80211_NUM_ACS)
977 return;
978
979 memset(&qparam, 0, sizeof(qparam));
980
981 rcu_read_lock();
982 chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
983 use_11b = (chanctx_conf &&
984 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
985 !link->operating_11g_mode;
986 rcu_read_unlock();
987
988 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
989
990 /* Set defaults according to 802.11-2007 Table 7-37 */
991 aCWmax = 1023;
992 if (use_11b)
993 aCWmin = 31;
994 else
995 aCWmin = 15;
996
997 /* Configure old 802.11b/g medium access rules. */
998 qparam.cw_max = aCWmax;
999 qparam.cw_min = aCWmin;
1000 qparam.txop = 0;
1001 qparam.aifs = 2;
1002
1003 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1004 /* Update if QoS is enabled. */
1005 if (enable_qos) {
1006 switch (ac) {
1007 case IEEE80211_AC_BK:
1008 qparam.cw_max = aCWmax;
1009 qparam.cw_min = aCWmin;
1010 qparam.txop = 0;
1011 if (is_ocb)
1012 qparam.aifs = 9;
1013 else
1014 qparam.aifs = 7;
1015 break;
1016 /* never happens but let's not leave undefined */
1017 default:
1018 case IEEE80211_AC_BE:
1019 qparam.cw_max = aCWmax;
1020 qparam.cw_min = aCWmin;
1021 qparam.txop = 0;
1022 if (is_ocb)
1023 qparam.aifs = 6;
1024 else
1025 qparam.aifs = 3;
1026 break;
1027 case IEEE80211_AC_VI:
1028 qparam.cw_max = aCWmin;
1029 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1030 if (is_ocb)
1031 qparam.txop = 0;
1032 else if (use_11b)
1033 qparam.txop = 6016/32;
1034 else
1035 qparam.txop = 3008/32;
1036
1037 if (is_ocb)
1038 qparam.aifs = 3;
1039 else
1040 qparam.aifs = 2;
1041 break;
1042 case IEEE80211_AC_VO:
1043 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1044 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1045 if (is_ocb)
1046 qparam.txop = 0;
1047 else if (use_11b)
1048 qparam.txop = 3264/32;
1049 else
1050 qparam.txop = 1504/32;
1051 qparam.aifs = 2;
1052 break;
1053 }
1054 }
1055 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1056
1057 qparam.uapsd = false;
1058
1059 link->tx_conf[ac] = qparam;
1060 drv_conf_tx(local, link, ac, &qparam);
1061 }
1062
1063 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1064 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1065 sdata->vif.type != NL80211_IFTYPE_NAN) {
1066 link->conf->qos = enable_qos;
1067 if (bss_notify)
1068 ieee80211_link_info_change_notify(sdata, link,
1069 BSS_CHANGED_QOS);
1070 }
1071}
1072
1073void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1074 u16 transaction, u16 auth_alg, u16 status,
1075 const u8 *extra, size_t extra_len, const u8 *da,
1076 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1077 u32 tx_flags)
1078{
1079 struct ieee80211_local *local = sdata->local;
1080 struct sk_buff *skb;
1081 struct ieee80211_mgmt *mgmt;
1082 bool multi_link = ieee80211_vif_is_mld(&sdata->vif);
1083 struct {
1084 u8 id;
1085 u8 len;
1086 u8 ext_id;
1087 struct ieee80211_multi_link_elem ml;
1088 struct ieee80211_mle_basic_common_info basic;
1089 } __packed mle = {
1090 .id = WLAN_EID_EXTENSION,
1091 .len = sizeof(mle) - 2,
1092 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1093 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1094 .basic.len = sizeof(mle.basic),
1095 };
1096 int err;
1097
1098 memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1099
1100 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1101 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1102 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1103 multi_link * sizeof(mle));
1104 if (!skb)
1105 return;
1106
1107 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1108
1109 mgmt = skb_put_zero(skb, 24 + 6);
1110 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1111 IEEE80211_STYPE_AUTH);
1112 memcpy(mgmt->da, da, ETH_ALEN);
1113 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1114 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1115 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1116 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1117 mgmt->u.auth.status_code = cpu_to_le16(status);
1118 if (extra)
1119 skb_put_data(skb, extra, extra_len);
1120 if (multi_link)
1121 skb_put_data(skb, &mle, sizeof(mle));
1122
1123 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1124 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1125 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1126 if (WARN_ON(err)) {
1127 kfree_skb(skb);
1128 return;
1129 }
1130 }
1131
1132 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1133 tx_flags;
1134 ieee80211_tx_skb(sdata, skb);
1135}
1136
1137void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1138 const u8 *da, const u8 *bssid,
1139 u16 stype, u16 reason,
1140 bool send_frame, u8 *frame_buf)
1141{
1142 struct ieee80211_local *local = sdata->local;
1143 struct sk_buff *skb;
1144 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1145
1146 /* build frame */
1147 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1148 mgmt->duration = 0; /* initialize only */
1149 mgmt->seq_ctrl = 0; /* initialize only */
1150 memcpy(mgmt->da, da, ETH_ALEN);
1151 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1152 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1153 /* u.deauth.reason_code == u.disassoc.reason_code */
1154 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1155
1156 if (send_frame) {
1157 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1158 IEEE80211_DEAUTH_FRAME_LEN);
1159 if (!skb)
1160 return;
1161
1162 skb_reserve(skb, local->hw.extra_tx_headroom);
1163
1164 /* copy in frame */
1165 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1166
1167 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1168 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1169 IEEE80211_SKB_CB(skb)->flags |=
1170 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1171
1172 ieee80211_tx_skb(sdata, skb);
1173 }
1174}
1175
1176static int ieee80211_put_s1g_cap(struct sk_buff *skb,
1177 struct ieee80211_sta_s1g_cap *s1g_cap)
1178{
1179 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_s1g_cap))
1180 return -ENOBUFS;
1181
1182 skb_put_u8(skb, WLAN_EID_S1G_CAPABILITIES);
1183 skb_put_u8(skb, sizeof(struct ieee80211_s1g_cap));
1184
1185 skb_put_data(skb, &s1g_cap->cap, sizeof(s1g_cap->cap));
1186 skb_put_data(skb, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs));
1187
1188 return 0;
1189}
1190
1191static int ieee80211_put_preq_ies_band(struct sk_buff *skb,
1192 struct ieee80211_sub_if_data *sdata,
1193 const u8 *ie, size_t ie_len,
1194 size_t *offset,
1195 enum nl80211_band band,
1196 u32 rate_mask,
1197 struct cfg80211_chan_def *chandef,
1198 u32 flags)
1199{
1200 struct ieee80211_local *local = sdata->local;
1201 struct ieee80211_supported_band *sband;
1202 int i, err;
1203 size_t noffset;
1204 u32 rate_flags;
1205 bool have_80mhz = false;
1206
1207 *offset = 0;
1208
1209 sband = local->hw.wiphy->bands[band];
1210 if (WARN_ON_ONCE(!sband))
1211 return 0;
1212
1213 rate_flags = ieee80211_chandef_rate_flags(chandef);
1214
1215 /* For direct scan add S1G IE and consider its override bits */
1216 if (band == NL80211_BAND_S1GHZ)
1217 return ieee80211_put_s1g_cap(skb, &sband->s1g_cap);
1218
1219 err = ieee80211_put_srates_elem(skb, sband, 0, rate_flags,
1220 ~rate_mask, WLAN_EID_SUPP_RATES);
1221 if (err)
1222 return err;
1223
1224 /* insert "request information" if in custom IEs */
1225 if (ie && ie_len) {
1226 static const u8 before_extrates[] = {
1227 WLAN_EID_SSID,
1228 WLAN_EID_SUPP_RATES,
1229 WLAN_EID_REQUEST,
1230 };
1231 noffset = ieee80211_ie_split(ie, ie_len,
1232 before_extrates,
1233 ARRAY_SIZE(before_extrates),
1234 *offset);
1235 if (skb_tailroom(skb) < noffset - *offset)
1236 return -ENOBUFS;
1237 skb_put_data(skb, ie + *offset, noffset - *offset);
1238 *offset = noffset;
1239 }
1240
1241 err = ieee80211_put_srates_elem(skb, sband, 0, rate_flags,
1242 ~rate_mask, WLAN_EID_EXT_SUPP_RATES);
1243 if (err)
1244 return err;
1245
1246 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1247 if (skb_tailroom(skb) < 3)
1248 return -ENOBUFS;
1249 skb_put_u8(skb, WLAN_EID_DS_PARAMS);
1250 skb_put_u8(skb, 1);
1251 skb_put_u8(skb,
1252 ieee80211_frequency_to_channel(chandef->chan->center_freq));
1253 }
1254
1255 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1256 return 0;
1257
1258 /* insert custom IEs that go before HT */
1259 if (ie && ie_len) {
1260 static const u8 before_ht[] = {
1261 /*
1262 * no need to list the ones split off already
1263 * (or generated here)
1264 */
1265 WLAN_EID_DS_PARAMS,
1266 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1267 };
1268 noffset = ieee80211_ie_split(ie, ie_len,
1269 before_ht, ARRAY_SIZE(before_ht),
1270 *offset);
1271 if (skb_tailroom(skb) < noffset - *offset)
1272 return -ENOBUFS;
1273 skb_put_data(skb, ie + *offset, noffset - *offset);
1274 *offset = noffset;
1275 }
1276
1277 if (sband->ht_cap.ht_supported) {
1278 u8 *pos;
1279
1280 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
1281 return -ENOBUFS;
1282
1283 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
1284 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1285 sband->ht_cap.cap);
1286 }
1287
1288 /* insert custom IEs that go before VHT */
1289 if (ie && ie_len) {
1290 static const u8 before_vht[] = {
1291 /*
1292 * no need to list the ones split off already
1293 * (or generated here)
1294 */
1295 WLAN_EID_BSS_COEX_2040,
1296 WLAN_EID_EXT_CAPABILITY,
1297 WLAN_EID_SSID_LIST,
1298 WLAN_EID_CHANNEL_USAGE,
1299 WLAN_EID_INTERWORKING,
1300 WLAN_EID_MESH_ID,
1301 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1302 };
1303 noffset = ieee80211_ie_split(ie, ie_len,
1304 before_vht, ARRAY_SIZE(before_vht),
1305 *offset);
1306 if (skb_tailroom(skb) < noffset - *offset)
1307 return -ENOBUFS;
1308 skb_put_data(skb, ie + *offset, noffset - *offset);
1309 *offset = noffset;
1310 }
1311
1312 /* Check if any channel in this sband supports at least 80 MHz */
1313 for (i = 0; i < sband->n_channels; i++) {
1314 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1315 IEEE80211_CHAN_NO_80MHZ))
1316 continue;
1317
1318 have_80mhz = true;
1319 break;
1320 }
1321
1322 if (sband->vht_cap.vht_supported && have_80mhz) {
1323 u8 *pos;
1324
1325 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
1326 return -ENOBUFS;
1327
1328 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
1329 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1330 sband->vht_cap.cap);
1331 }
1332
1333 /* insert custom IEs that go before HE */
1334 if (ie && ie_len) {
1335 static const u8 before_he[] = {
1336 /*
1337 * no need to list the ones split off before VHT
1338 * or generated here
1339 */
1340 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1341 WLAN_EID_AP_CSN,
1342 /* TODO: add 11ah/11aj/11ak elements */
1343 };
1344 noffset = ieee80211_ie_split(ie, ie_len,
1345 before_he, ARRAY_SIZE(before_he),
1346 *offset);
1347 if (skb_tailroom(skb) < noffset - *offset)
1348 return -ENOBUFS;
1349 skb_put_data(skb, ie + *offset, noffset - *offset);
1350 *offset = noffset;
1351 }
1352
1353 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1354 IEEE80211_CHAN_NO_HE)) {
1355 err = ieee80211_put_he_cap(skb, sdata, sband, NULL);
1356 if (err)
1357 return err;
1358 }
1359
1360 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1361 IEEE80211_CHAN_NO_HE |
1362 IEEE80211_CHAN_NO_EHT)) {
1363 err = ieee80211_put_eht_cap(skb, sdata, sband, NULL);
1364 if (err)
1365 return err;
1366 }
1367
1368 err = ieee80211_put_he_6ghz_cap(skb, sdata, IEEE80211_SMPS_OFF);
1369 if (err)
1370 return err;
1371
1372 /*
1373 * If adding more here, adjust code in main.c
1374 * that calculates local->scan_ies_len.
1375 */
1376
1377 return 0;
1378}
1379
1380static int ieee80211_put_preq_ies(struct sk_buff *skb,
1381 struct ieee80211_sub_if_data *sdata,
1382 struct ieee80211_scan_ies *ie_desc,
1383 const u8 *ie, size_t ie_len,
1384 u8 bands_used, u32 *rate_masks,
1385 struct cfg80211_chan_def *chandef,
1386 u32 flags)
1387{
1388 size_t custom_ie_offset = 0;
1389 int i, err;
1390
1391 memset(ie_desc, 0, sizeof(*ie_desc));
1392
1393 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1394 if (bands_used & BIT(i)) {
1395 ie_desc->ies[i] = skb_tail_pointer(skb);
1396 err = ieee80211_put_preq_ies_band(skb, sdata,
1397 ie, ie_len,
1398 &custom_ie_offset,
1399 i, rate_masks[i],
1400 chandef, flags);
1401 if (err)
1402 return err;
1403 ie_desc->len[i] = skb_tail_pointer(skb) -
1404 ie_desc->ies[i];
1405 }
1406 }
1407
1408 /* add any remaining custom IEs */
1409 if (ie && ie_len) {
1410 if (WARN_ONCE(skb_tailroom(skb) < ie_len - custom_ie_offset,
1411 "not enough space for preq custom IEs\n"))
1412 return -ENOBUFS;
1413 ie_desc->common_ies = skb_tail_pointer(skb);
1414 skb_put_data(skb, ie + custom_ie_offset,
1415 ie_len - custom_ie_offset);
1416 ie_desc->common_ie_len = skb_tail_pointer(skb) -
1417 ie_desc->common_ies;
1418 }
1419
1420 return 0;
1421};
1422
1423int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1424 size_t buffer_len,
1425 struct ieee80211_scan_ies *ie_desc,
1426 const u8 *ie, size_t ie_len,
1427 u8 bands_used, u32 *rate_masks,
1428 struct cfg80211_chan_def *chandef,
1429 u32 flags)
1430{
1431 struct sk_buff *skb = alloc_skb(buffer_len, GFP_KERNEL);
1432 uintptr_t offs;
1433 int ret, i;
1434 u8 *start;
1435
1436 if (!skb)
1437 return -ENOMEM;
1438
1439 start = skb_tail_pointer(skb);
1440 memset(start, 0, skb_tailroom(skb));
1441 ret = ieee80211_put_preq_ies(skb, sdata, ie_desc, ie, ie_len,
1442 bands_used, rate_masks, chandef,
1443 flags);
1444 if (ret < 0) {
1445 goto out;
1446 }
1447
1448 if (skb->len > buffer_len) {
1449 ret = -ENOBUFS;
1450 goto out;
1451 }
1452
1453 memcpy(buffer, start, skb->len);
1454
1455 /* adjust ie_desc for copy */
1456 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1457 offs = ie_desc->ies[i] - start;
1458 ie_desc->ies[i] = buffer + offs;
1459 }
1460 offs = ie_desc->common_ies - start;
1461 ie_desc->common_ies = buffer + offs;
1462
1463 ret = skb->len;
1464out:
1465 consume_skb(skb);
1466 return ret;
1467}
1468
1469struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1470 const u8 *src, const u8 *dst,
1471 u32 ratemask,
1472 struct ieee80211_channel *chan,
1473 const u8 *ssid, size_t ssid_len,
1474 const u8 *ie, size_t ie_len,
1475 u32 flags)
1476{
1477 struct ieee80211_local *local = sdata->local;
1478 struct cfg80211_chan_def chandef;
1479 struct sk_buff *skb;
1480 struct ieee80211_mgmt *mgmt;
1481 u32 rate_masks[NUM_NL80211_BANDS] = {};
1482 struct ieee80211_scan_ies dummy_ie_desc;
1483
1484 /*
1485 * Do not send DS Channel parameter for directed probe requests
1486 * in order to maximize the chance that we get a response. Some
1487 * badly-behaved APs don't respond when this parameter is included.
1488 */
1489 chandef.width = sdata->vif.bss_conf.chanreq.oper.width;
1490 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1491 chandef.chan = NULL;
1492 else
1493 chandef.chan = chan;
1494
1495 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1496 local->scan_ies_len + ie_len);
1497 if (!skb)
1498 return NULL;
1499
1500 rate_masks[chan->band] = ratemask;
1501 ieee80211_put_preq_ies(skb, sdata, &dummy_ie_desc,
1502 ie, ie_len, BIT(chan->band),
1503 rate_masks, &chandef, flags);
1504
1505 if (dst) {
1506 mgmt = (struct ieee80211_mgmt *) skb->data;
1507 memcpy(mgmt->da, dst, ETH_ALEN);
1508 memcpy(mgmt->bssid, dst, ETH_ALEN);
1509 }
1510
1511 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1512
1513 return skb;
1514}
1515
1516u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1517 struct ieee802_11_elems *elems,
1518 enum nl80211_band band, u32 *basic_rates)
1519{
1520 struct ieee80211_supported_band *sband;
1521 size_t num_rates;
1522 u32 supp_rates, rate_flags;
1523 int i, j;
1524
1525 sband = sdata->local->hw.wiphy->bands[band];
1526 if (WARN_ON(!sband))
1527 return 1;
1528
1529 rate_flags =
1530 ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chanreq.oper);
1531
1532 num_rates = sband->n_bitrates;
1533 supp_rates = 0;
1534 for (i = 0; i < elems->supp_rates_len +
1535 elems->ext_supp_rates_len; i++) {
1536 u8 rate = 0;
1537 int own_rate;
1538 bool is_basic;
1539 if (i < elems->supp_rates_len)
1540 rate = elems->supp_rates[i];
1541 else if (elems->ext_supp_rates)
1542 rate = elems->ext_supp_rates
1543 [i - elems->supp_rates_len];
1544 own_rate = 5 * (rate & 0x7f);
1545 is_basic = !!(rate & 0x80);
1546
1547 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1548 continue;
1549
1550 for (j = 0; j < num_rates; j++) {
1551 int brate;
1552 if ((rate_flags & sband->bitrates[j].flags)
1553 != rate_flags)
1554 continue;
1555
1556 brate = sband->bitrates[j].bitrate;
1557
1558 if (brate == own_rate) {
1559 supp_rates |= BIT(j);
1560 if (basic_rates && is_basic)
1561 *basic_rates |= BIT(j);
1562 }
1563 }
1564 }
1565 return supp_rates;
1566}
1567
1568void ieee80211_stop_device(struct ieee80211_local *local, bool suspend)
1569{
1570 local_bh_disable();
1571 ieee80211_handle_queued_frames(local);
1572 local_bh_enable();
1573
1574 ieee80211_led_radio(local, false);
1575 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1576
1577 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1578
1579 flush_workqueue(local->workqueue);
1580 wiphy_work_flush(local->hw.wiphy, NULL);
1581 drv_stop(local, suspend);
1582}
1583
1584static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1585 bool aborted)
1586{
1587 /* It's possible that we don't handle the scan completion in
1588 * time during suspend, so if it's still marked as completed
1589 * here, queue the work and flush it to clean things up.
1590 * Instead of calling the worker function directly here, we
1591 * really queue it to avoid potential races with other flows
1592 * scheduling the same work.
1593 */
1594 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1595 /* If coming from reconfiguration failure, abort the scan so
1596 * we don't attempt to continue a partial HW scan - which is
1597 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1598 * completed scan, and a 5 GHz portion is still pending.
1599 */
1600 if (aborted)
1601 set_bit(SCAN_ABORTED, &local->scanning);
1602 wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0);
1603 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
1604 }
1605}
1606
1607static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1608{
1609 struct ieee80211_sub_if_data *sdata;
1610 struct ieee80211_chanctx *ctx;
1611
1612 lockdep_assert_wiphy(local->hw.wiphy);
1613
1614 /*
1615 * We get here if during resume the device can't be restarted properly.
1616 * We might also get here if this happens during HW reset, which is a
1617 * slightly different situation and we need to drop all connections in
1618 * the latter case.
1619 *
1620 * Ask cfg80211 to turn off all interfaces, this will result in more
1621 * warnings but at least we'll then get into a clean stopped state.
1622 */
1623
1624 local->resuming = false;
1625 local->suspended = false;
1626 local->in_reconfig = false;
1627 local->reconfig_failure = true;
1628
1629 ieee80211_flush_completed_scan(local, true);
1630
1631 /* scheduled scan clearly can't be running any more, but tell
1632 * cfg80211 and clear local state
1633 */
1634 ieee80211_sched_scan_end(local);
1635
1636 list_for_each_entry(sdata, &local->interfaces, list)
1637 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1638
1639 /* Mark channel contexts as not being in the driver any more to avoid
1640 * removing them from the driver during the shutdown process...
1641 */
1642 list_for_each_entry(ctx, &local->chanctx_list, list)
1643 ctx->driver_present = false;
1644}
1645
1646static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1647 struct ieee80211_sub_if_data *sdata,
1648 struct ieee80211_link_data *link)
1649{
1650 struct ieee80211_chanctx_conf *conf;
1651 struct ieee80211_chanctx *ctx;
1652
1653 lockdep_assert_wiphy(local->hw.wiphy);
1654
1655 conf = rcu_dereference_protected(link->conf->chanctx_conf,
1656 lockdep_is_held(&local->hw.wiphy->mtx));
1657 if (conf) {
1658 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1659 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
1660 }
1661}
1662
1663static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1664{
1665 struct ieee80211_local *local = sdata->local;
1666 struct sta_info *sta;
1667
1668 lockdep_assert_wiphy(local->hw.wiphy);
1669
1670 /* add STAs back */
1671 list_for_each_entry(sta, &local->sta_list, list) {
1672 enum ieee80211_sta_state state;
1673
1674 if (!sta->uploaded || sta->sdata != sdata)
1675 continue;
1676
1677 for (state = IEEE80211_STA_NOTEXIST;
1678 state < sta->sta_state; state++)
1679 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1680 state + 1));
1681 }
1682}
1683
1684static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1685{
1686 struct cfg80211_nan_func *func, **funcs;
1687 int res, id, i = 0;
1688
1689 res = drv_start_nan(sdata->local, sdata,
1690 &sdata->u.nan.conf);
1691 if (WARN_ON(res))
1692 return res;
1693
1694 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1695 sizeof(*funcs),
1696 GFP_KERNEL);
1697 if (!funcs)
1698 return -ENOMEM;
1699
1700 /* Add all the functions:
1701 * This is a little bit ugly. We need to call a potentially sleeping
1702 * callback for each NAN function, so we can't hold the spinlock.
1703 */
1704 spin_lock_bh(&sdata->u.nan.func_lock);
1705
1706 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1707 funcs[i++] = func;
1708
1709 spin_unlock_bh(&sdata->u.nan.func_lock);
1710
1711 for (i = 0; funcs[i]; i++) {
1712 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1713 if (WARN_ON(res))
1714 ieee80211_nan_func_terminated(&sdata->vif,
1715 funcs[i]->instance_id,
1716 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1717 GFP_KERNEL);
1718 }
1719
1720 kfree(funcs);
1721
1722 return 0;
1723}
1724
1725static void ieee80211_reconfig_ap_links(struct ieee80211_local *local,
1726 struct ieee80211_sub_if_data *sdata,
1727 u64 changed)
1728{
1729 int link_id;
1730
1731 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
1732 struct ieee80211_link_data *link;
1733
1734 if (!(sdata->vif.active_links & BIT(link_id)))
1735 continue;
1736
1737 link = sdata_dereference(sdata->link[link_id], sdata);
1738 if (!link)
1739 continue;
1740
1741 if (rcu_access_pointer(link->u.ap.beacon))
1742 drv_start_ap(local, sdata, link->conf);
1743
1744 if (!link->conf->enable_beacon)
1745 continue;
1746
1747 changed |= BSS_CHANGED_BEACON |
1748 BSS_CHANGED_BEACON_ENABLED;
1749
1750 ieee80211_link_info_change_notify(sdata, link, changed);
1751 }
1752}
1753
1754int ieee80211_reconfig(struct ieee80211_local *local)
1755{
1756 struct ieee80211_hw *hw = &local->hw;
1757 struct ieee80211_sub_if_data *sdata;
1758 struct ieee80211_chanctx *ctx;
1759 struct sta_info *sta;
1760 int res, i;
1761 bool reconfig_due_to_wowlan = false;
1762 struct ieee80211_sub_if_data *sched_scan_sdata;
1763 struct cfg80211_sched_scan_request *sched_scan_req;
1764 bool sched_scan_stopped = false;
1765 bool suspended = local->suspended;
1766 bool in_reconfig = false;
1767
1768 lockdep_assert_wiphy(local->hw.wiphy);
1769
1770 /* nothing to do if HW shouldn't run */
1771 if (!local->open_count)
1772 goto wake_up;
1773
1774#ifdef CONFIG_PM
1775 if (suspended)
1776 local->resuming = true;
1777
1778 if (local->wowlan) {
1779 /*
1780 * In the wowlan case, both mac80211 and the device
1781 * are functional when the resume op is called, so
1782 * clear local->suspended so the device could operate
1783 * normally (e.g. pass rx frames).
1784 */
1785 local->suspended = false;
1786 res = drv_resume(local);
1787 local->wowlan = false;
1788 if (res < 0) {
1789 local->resuming = false;
1790 return res;
1791 }
1792 if (res == 0)
1793 goto wake_up;
1794 WARN_ON(res > 1);
1795 /*
1796 * res is 1, which means the driver requested
1797 * to go through a regular reset on wakeup.
1798 * restore local->suspended in this case.
1799 */
1800 reconfig_due_to_wowlan = true;
1801 local->suspended = true;
1802 }
1803#endif
1804
1805 /*
1806 * In case of hw_restart during suspend (without wowlan),
1807 * cancel restart work, as we are reconfiguring the device
1808 * anyway.
1809 * Note that restart_work is scheduled on a frozen workqueue,
1810 * so we can't deadlock in this case.
1811 */
1812 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1813 cancel_work_sync(&local->restart_work);
1814
1815 local->started = false;
1816
1817 /*
1818 * Upon resume hardware can sometimes be goofy due to
1819 * various platform / driver / bus issues, so restarting
1820 * the device may at times not work immediately. Propagate
1821 * the error.
1822 */
1823 res = drv_start(local);
1824 if (res) {
1825 if (suspended)
1826 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1827 else
1828 WARN(1, "Hardware became unavailable during restart.\n");
1829 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1830 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1831 false);
1832 ieee80211_handle_reconfig_failure(local);
1833 return res;
1834 }
1835
1836 /* setup fragmentation threshold */
1837 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1838
1839 /* setup RTS threshold */
1840 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1841
1842 /* reset coverage class */
1843 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1844
1845 ieee80211_led_radio(local, true);
1846 ieee80211_mod_tpt_led_trig(local,
1847 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1848
1849 /* add interfaces */
1850 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1851 if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
1852 /* in HW restart it exists already */
1853 WARN_ON(local->resuming);
1854 res = drv_add_interface(local, sdata);
1855 if (WARN_ON(res)) {
1856 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1857 synchronize_net();
1858 kfree(sdata);
1859 }
1860 }
1861
1862 list_for_each_entry(sdata, &local->interfaces, list) {
1863 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
1864 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1865 continue;
1866 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1867 ieee80211_sdata_running(sdata)) {
1868 res = drv_add_interface(local, sdata);
1869 if (WARN_ON(res))
1870 break;
1871 }
1872 }
1873
1874 /* If adding any of the interfaces failed above, roll back and
1875 * report failure.
1876 */
1877 if (res) {
1878 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1879 list) {
1880 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
1881 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1882 continue;
1883 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1884 ieee80211_sdata_running(sdata))
1885 drv_remove_interface(local, sdata);
1886 }
1887 ieee80211_handle_reconfig_failure(local);
1888 return res;
1889 }
1890
1891 /* add channel contexts */
1892 list_for_each_entry(ctx, &local->chanctx_list, list)
1893 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1894 WARN_ON(drv_add_chanctx(local, ctx));
1895
1896 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1897 if (sdata && ieee80211_sdata_running(sdata))
1898 ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
1899
1900 /* reconfigure hardware */
1901 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_LISTEN_INTERVAL |
1902 IEEE80211_CONF_CHANGE_MONITOR |
1903 IEEE80211_CONF_CHANGE_PS |
1904 IEEE80211_CONF_CHANGE_RETRY_LIMITS |
1905 IEEE80211_CONF_CHANGE_IDLE);
1906
1907 ieee80211_configure_filter(local);
1908
1909 /* Finally also reconfigure all the BSS information */
1910 list_for_each_entry(sdata, &local->interfaces, list) {
1911 /* common change flags for all interface types - link only */
1912 u64 changed = BSS_CHANGED_ERP_CTS_PROT |
1913 BSS_CHANGED_ERP_PREAMBLE |
1914 BSS_CHANGED_ERP_SLOT |
1915 BSS_CHANGED_HT |
1916 BSS_CHANGED_BASIC_RATES |
1917 BSS_CHANGED_BEACON_INT |
1918 BSS_CHANGED_BSSID |
1919 BSS_CHANGED_CQM |
1920 BSS_CHANGED_QOS |
1921 BSS_CHANGED_TXPOWER |
1922 BSS_CHANGED_MCAST_RATE;
1923 struct ieee80211_link_data *link = NULL;
1924 unsigned int link_id;
1925 u32 active_links = 0;
1926
1927 if (!ieee80211_sdata_running(sdata))
1928 continue;
1929
1930 if (ieee80211_vif_is_mld(&sdata->vif)) {
1931 struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS] = {
1932 [0] = &sdata->vif.bss_conf,
1933 };
1934
1935 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1936 /* start with a single active link */
1937 active_links = sdata->vif.active_links;
1938 link_id = ffs(active_links) - 1;
1939 sdata->vif.active_links = BIT(link_id);
1940 }
1941
1942 drv_change_vif_links(local, sdata, 0,
1943 sdata->vif.active_links,
1944 old);
1945 }
1946
1947 sdata->restart_active_links = active_links;
1948
1949 for (link_id = 0;
1950 link_id < ARRAY_SIZE(sdata->vif.link_conf);
1951 link_id++) {
1952 if (!ieee80211_vif_link_active(&sdata->vif, link_id))
1953 continue;
1954
1955 link = sdata_dereference(sdata->link[link_id], sdata);
1956 if (!link)
1957 continue;
1958
1959 ieee80211_assign_chanctx(local, sdata, link);
1960 }
1961
1962 switch (sdata->vif.type) {
1963 case NL80211_IFTYPE_AP_VLAN:
1964 case NL80211_IFTYPE_MONITOR:
1965 break;
1966 case NL80211_IFTYPE_ADHOC:
1967 if (sdata->vif.cfg.ibss_joined)
1968 WARN_ON(drv_join_ibss(local, sdata));
1969 fallthrough;
1970 default:
1971 ieee80211_reconfig_stations(sdata);
1972 fallthrough;
1973 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1974 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1975 drv_conf_tx(local, &sdata->deflink, i,
1976 &sdata->deflink.tx_conf[i]);
1977 break;
1978 }
1979
1980 if (sdata->vif.bss_conf.mu_mimo_owner)
1981 changed |= BSS_CHANGED_MU_GROUPS;
1982
1983 if (!ieee80211_vif_is_mld(&sdata->vif))
1984 changed |= BSS_CHANGED_IDLE;
1985
1986 switch (sdata->vif.type) {
1987 case NL80211_IFTYPE_STATION:
1988 if (!ieee80211_vif_is_mld(&sdata->vif)) {
1989 changed |= BSS_CHANGED_ASSOC |
1990 BSS_CHANGED_ARP_FILTER |
1991 BSS_CHANGED_PS;
1992
1993 /* Re-send beacon info report to the driver */
1994 if (sdata->deflink.u.mgd.have_beacon)
1995 changed |= BSS_CHANGED_BEACON_INFO;
1996
1997 if (sdata->vif.bss_conf.max_idle_period ||
1998 sdata->vif.bss_conf.protected_keep_alive)
1999 changed |= BSS_CHANGED_KEEP_ALIVE;
2000
2001 ieee80211_bss_info_change_notify(sdata,
2002 changed);
2003 } else if (!WARN_ON(!link)) {
2004 ieee80211_link_info_change_notify(sdata, link,
2005 changed);
2006 changed = BSS_CHANGED_ASSOC |
2007 BSS_CHANGED_IDLE |
2008 BSS_CHANGED_PS |
2009 BSS_CHANGED_ARP_FILTER;
2010 ieee80211_vif_cfg_change_notify(sdata, changed);
2011 }
2012 break;
2013 case NL80211_IFTYPE_OCB:
2014 changed |= BSS_CHANGED_OCB;
2015 ieee80211_bss_info_change_notify(sdata, changed);
2016 break;
2017 case NL80211_IFTYPE_ADHOC:
2018 changed |= BSS_CHANGED_IBSS;
2019 fallthrough;
2020 case NL80211_IFTYPE_AP:
2021 changed |= BSS_CHANGED_P2P_PS;
2022
2023 if (ieee80211_vif_is_mld(&sdata->vif))
2024 ieee80211_vif_cfg_change_notify(sdata,
2025 BSS_CHANGED_SSID);
2026 else
2027 changed |= BSS_CHANGED_SSID;
2028
2029 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2030 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2031 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2032 changed |= BSS_CHANGED_FTM_RESPONDER;
2033
2034 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2035 changed |= BSS_CHANGED_AP_PROBE_RESP;
2036
2037 if (ieee80211_vif_is_mld(&sdata->vif)) {
2038 ieee80211_reconfig_ap_links(local,
2039 sdata,
2040 changed);
2041 break;
2042 }
2043
2044 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2045 drv_start_ap(local, sdata,
2046 sdata->deflink.conf);
2047 }
2048 fallthrough;
2049 case NL80211_IFTYPE_MESH_POINT:
2050 if (sdata->vif.bss_conf.enable_beacon) {
2051 changed |= BSS_CHANGED_BEACON |
2052 BSS_CHANGED_BEACON_ENABLED;
2053 ieee80211_bss_info_change_notify(sdata, changed);
2054 }
2055 break;
2056 case NL80211_IFTYPE_NAN:
2057 res = ieee80211_reconfig_nan(sdata);
2058 if (res < 0) {
2059 ieee80211_handle_reconfig_failure(local);
2060 return res;
2061 }
2062 break;
2063 case NL80211_IFTYPE_AP_VLAN:
2064 case NL80211_IFTYPE_MONITOR:
2065 case NL80211_IFTYPE_P2P_DEVICE:
2066 /* nothing to do */
2067 break;
2068 case NL80211_IFTYPE_UNSPECIFIED:
2069 case NUM_NL80211_IFTYPES:
2070 case NL80211_IFTYPE_P2P_CLIENT:
2071 case NL80211_IFTYPE_P2P_GO:
2072 case NL80211_IFTYPE_WDS:
2073 WARN_ON(1);
2074 break;
2075 }
2076 }
2077
2078 ieee80211_recalc_ps(local);
2079
2080 /*
2081 * The sta might be in psm against the ap (e.g. because
2082 * this was the state before a hw restart), so we
2083 * explicitly send a null packet in order to make sure
2084 * it'll sync against the ap (and get out of psm).
2085 */
2086 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2087 list_for_each_entry(sdata, &local->interfaces, list) {
2088 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2089 continue;
2090 if (!sdata->u.mgd.associated)
2091 continue;
2092
2093 ieee80211_send_nullfunc(local, sdata, false);
2094 }
2095 }
2096
2097 /* APs are now beaconing, add back stations */
2098 list_for_each_entry(sdata, &local->interfaces, list) {
2099 if (!ieee80211_sdata_running(sdata))
2100 continue;
2101
2102 switch (sdata->vif.type) {
2103 case NL80211_IFTYPE_AP_VLAN:
2104 case NL80211_IFTYPE_AP:
2105 ieee80211_reconfig_stations(sdata);
2106 break;
2107 default:
2108 break;
2109 }
2110 }
2111
2112 /* add back keys */
2113 list_for_each_entry(sdata, &local->interfaces, list)
2114 ieee80211_reenable_keys(sdata);
2115
2116 /* re-enable multi-link for client interfaces */
2117 list_for_each_entry(sdata, &local->interfaces, list) {
2118 if (sdata->restart_active_links)
2119 ieee80211_set_active_links(&sdata->vif,
2120 sdata->restart_active_links);
2121 /*
2122 * If a link switch was scheduled before the restart, and ran
2123 * before reconfig, it will do nothing, so re-schedule.
2124 */
2125 if (sdata->desired_active_links)
2126 wiphy_work_queue(sdata->local->hw.wiphy,
2127 &sdata->activate_links_work);
2128 }
2129
2130 /* Reconfigure sched scan if it was interrupted by FW restart */
2131 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2132 lockdep_is_held(&local->hw.wiphy->mtx));
2133 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2134 lockdep_is_held(&local->hw.wiphy->mtx));
2135 if (sched_scan_sdata && sched_scan_req)
2136 /*
2137 * Sched scan stopped, but we don't want to report it. Instead,
2138 * we're trying to reschedule. However, if more than one scan
2139 * plan was set, we cannot reschedule since we don't know which
2140 * scan plan was currently running (and some scan plans may have
2141 * already finished).
2142 */
2143 if (sched_scan_req->n_scan_plans > 1 ||
2144 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2145 sched_scan_req)) {
2146 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2147 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2148 sched_scan_stopped = true;
2149 }
2150
2151 if (sched_scan_stopped)
2152 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2153
2154 wake_up:
2155
2156 if (local->monitors == local->open_count && local->monitors > 0)
2157 ieee80211_add_virtual_monitor(local);
2158
2159 /*
2160 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2161 * sessions can be established after a resume.
2162 *
2163 * Also tear down aggregation sessions since reconfiguring
2164 * them in a hardware restart scenario is not easily done
2165 * right now, and the hardware will have lost information
2166 * about the sessions, but we and the AP still think they
2167 * are active. This is really a workaround though.
2168 */
2169 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2170 list_for_each_entry(sta, &local->sta_list, list) {
2171 if (!local->resuming)
2172 ieee80211_sta_tear_down_BA_sessions(
2173 sta, AGG_STOP_LOCAL_REQUEST);
2174 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2175 }
2176 }
2177
2178 /*
2179 * If this is for hw restart things are still running.
2180 * We may want to change that later, however.
2181 */
2182 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2183 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2184
2185 if (local->in_reconfig) {
2186 in_reconfig = local->in_reconfig;
2187 local->in_reconfig = false;
2188 barrier();
2189
2190 ieee80211_reconfig_roc(local);
2191
2192 /* Requeue all works */
2193 list_for_each_entry(sdata, &local->interfaces, list)
2194 wiphy_work_queue(local->hw.wiphy, &sdata->work);
2195 }
2196
2197 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2198 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2199 false);
2200
2201 if (in_reconfig) {
2202 list_for_each_entry(sdata, &local->interfaces, list) {
2203 if (!ieee80211_sdata_running(sdata))
2204 continue;
2205 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2206 ieee80211_sta_restart(sdata);
2207 }
2208 }
2209
2210 if (!suspended)
2211 return 0;
2212
2213#ifdef CONFIG_PM
2214 /* first set suspended false, then resuming */
2215 local->suspended = false;
2216 mb();
2217 local->resuming = false;
2218
2219 ieee80211_flush_completed_scan(local, false);
2220
2221 if (local->open_count && !reconfig_due_to_wowlan)
2222 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2223
2224 list_for_each_entry(sdata, &local->interfaces, list) {
2225 if (!ieee80211_sdata_running(sdata))
2226 continue;
2227 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2228 ieee80211_sta_restart(sdata);
2229 }
2230
2231 mod_timer(&local->sta_cleanup, jiffies + 1);
2232#else
2233 WARN_ON(1);
2234#endif
2235
2236 return 0;
2237}
2238
2239static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2240{
2241 struct ieee80211_sub_if_data *sdata;
2242 struct ieee80211_local *local;
2243 struct ieee80211_key *key;
2244
2245 if (WARN_ON(!vif))
2246 return;
2247
2248 sdata = vif_to_sdata(vif);
2249 local = sdata->local;
2250
2251 lockdep_assert_wiphy(local->hw.wiphy);
2252
2253 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2254 !local->resuming))
2255 return;
2256
2257 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2258 !local->in_reconfig))
2259 return;
2260
2261 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2262 return;
2263
2264 sdata->flags |= flag;
2265
2266 list_for_each_entry(key, &sdata->key_list, list)
2267 key->flags |= KEY_FLAG_TAINTED;
2268}
2269
2270void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2271{
2272 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2273}
2274EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2275
2276void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2277{
2278 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2279}
2280EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2281
2282void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2283 struct ieee80211_link_data *link)
2284{
2285 struct ieee80211_local *local = sdata->local;
2286 struct ieee80211_chanctx_conf *chanctx_conf;
2287 struct ieee80211_chanctx *chanctx;
2288
2289 lockdep_assert_wiphy(local->hw.wiphy);
2290
2291 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2292 lockdep_is_held(&local->hw.wiphy->mtx));
2293
2294 /*
2295 * This function can be called from a work, thus it may be possible
2296 * that the chanctx_conf is removed (due to a disconnection, for
2297 * example).
2298 * So nothing should be done in such case.
2299 */
2300 if (!chanctx_conf)
2301 return;
2302
2303 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2304 ieee80211_recalc_smps_chanctx(local, chanctx);
2305}
2306
2307void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2308 int link_id)
2309{
2310 struct ieee80211_local *local = sdata->local;
2311 struct ieee80211_chanctx_conf *chanctx_conf;
2312 struct ieee80211_chanctx *chanctx;
2313 int i;
2314
2315 lockdep_assert_wiphy(local->hw.wiphy);
2316
2317 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
2318 struct ieee80211_bss_conf *bss_conf;
2319
2320 if (link_id >= 0 && link_id != i)
2321 continue;
2322
2323 rcu_read_lock();
2324 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
2325 if (!bss_conf) {
2326 rcu_read_unlock();
2327 continue;
2328 }
2329
2330 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
2331 lockdep_is_held(&local->hw.wiphy->mtx));
2332 /*
2333 * Since we hold the wiphy mutex (checked above)
2334 * we can take the chanctx_conf pointer out of the
2335 * RCU critical section, it cannot go away without
2336 * the mutex. Just the way we reached it could - in
2337 * theory - go away, but we don't really care and
2338 * it really shouldn't happen anyway.
2339 */
2340 rcu_read_unlock();
2341
2342 if (!chanctx_conf)
2343 return;
2344
2345 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
2346 conf);
2347 ieee80211_recalc_chanctx_min_def(local, chanctx, NULL, false);
2348 }
2349}
2350
2351size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2352{
2353 size_t pos = offset;
2354
2355 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2356 pos += 2 + ies[pos + 1];
2357
2358 return pos;
2359}
2360
2361u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2362 u16 cap)
2363{
2364 __le16 tmp;
2365
2366 *pos++ = WLAN_EID_HT_CAPABILITY;
2367 *pos++ = sizeof(struct ieee80211_ht_cap);
2368 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2369
2370 /* capability flags */
2371 tmp = cpu_to_le16(cap);
2372 memcpy(pos, &tmp, sizeof(u16));
2373 pos += sizeof(u16);
2374
2375 /* AMPDU parameters */
2376 *pos++ = ht_cap->ampdu_factor |
2377 (ht_cap->ampdu_density <<
2378 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2379
2380 /* MCS set */
2381 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2382 pos += sizeof(ht_cap->mcs);
2383
2384 /* extended capabilities */
2385 pos += sizeof(__le16);
2386
2387 /* BF capabilities */
2388 pos += sizeof(__le32);
2389
2390 /* antenna selection */
2391 pos += sizeof(u8);
2392
2393 return pos;
2394}
2395
2396u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2397 u32 cap)
2398{
2399 __le32 tmp;
2400
2401 *pos++ = WLAN_EID_VHT_CAPABILITY;
2402 *pos++ = sizeof(struct ieee80211_vht_cap);
2403 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2404
2405 /* capability flags */
2406 tmp = cpu_to_le32(cap);
2407 memcpy(pos, &tmp, sizeof(u32));
2408 pos += sizeof(u32);
2409
2410 /* VHT MCS set */
2411 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2412 pos += sizeof(vht_cap->vht_mcs);
2413
2414 return pos;
2415}
2416
2417/* this may return more than ieee80211_put_he_6ghz_cap() will need */
2418u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata)
2419{
2420 const struct ieee80211_sta_he_cap *he_cap;
2421 struct ieee80211_supported_band *sband;
2422 u8 n;
2423
2424 sband = ieee80211_get_sband(sdata);
2425 if (!sband)
2426 return 0;
2427
2428 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2429 if (!he_cap)
2430 return 0;
2431
2432 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2433 return 2 + 1 +
2434 sizeof(he_cap->he_cap_elem) + n +
2435 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2436 he_cap->he_cap_elem.phy_cap_info);
2437}
2438
2439static void
2440ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings *conn,
2441 const struct ieee80211_sta_he_cap *he_cap,
2442 struct ieee80211_he_cap_elem *elem)
2443{
2444 u8 ru_limit, max_ru;
2445
2446 *elem = he_cap->he_cap_elem;
2447
2448 switch (conn->bw_limit) {
2449 case IEEE80211_CONN_BW_LIMIT_20:
2450 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_242;
2451 break;
2452 case IEEE80211_CONN_BW_LIMIT_40:
2453 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_484;
2454 break;
2455 case IEEE80211_CONN_BW_LIMIT_80:
2456 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_996;
2457 break;
2458 default:
2459 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_2x996;
2460 break;
2461 }
2462
2463 max_ru = elem->phy_cap_info[8] & IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
2464 max_ru = min(max_ru, ru_limit);
2465 elem->phy_cap_info[8] &= ~IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
2466 elem->phy_cap_info[8] |= max_ru;
2467
2468 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) {
2469 elem->phy_cap_info[0] &=
2470 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2471 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2472 elem->phy_cap_info[9] &=
2473 ~IEEE80211_HE_PHY_CAP9_LONGER_THAN_16_SIGB_OFDM_SYM;
2474 }
2475
2476 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
2477 elem->phy_cap_info[0] &=
2478 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
2479 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G);
2480 elem->phy_cap_info[5] &=
2481 ~IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK;
2482 elem->phy_cap_info[7] &=
2483 ~(IEEE80211_HE_PHY_CAP7_STBC_TX_ABOVE_80MHZ |
2484 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ);
2485 }
2486}
2487
2488int ieee80211_put_he_cap(struct sk_buff *skb,
2489 struct ieee80211_sub_if_data *sdata,
2490 const struct ieee80211_supported_band *sband,
2491 const struct ieee80211_conn_settings *conn)
2492{
2493 const struct ieee80211_sta_he_cap *he_cap;
2494 struct ieee80211_he_cap_elem elem;
2495 u8 *len;
2496 u8 n;
2497 u8 ie_len;
2498
2499 if (!conn)
2500 conn = &ieee80211_conn_settings_unlimited;
2501
2502 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2503 if (!he_cap)
2504 return 0;
2505
2506 /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2507 ieee80211_get_adjusted_he_cap(conn, he_cap, &elem);
2508
2509 n = ieee80211_he_mcs_nss_size(&elem);
2510 ie_len = 2 + 1 +
2511 sizeof(he_cap->he_cap_elem) + n +
2512 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2513 he_cap->he_cap_elem.phy_cap_info);
2514
2515 if (skb_tailroom(skb) < ie_len)
2516 return -ENOBUFS;
2517
2518 skb_put_u8(skb, WLAN_EID_EXTENSION);
2519 len = skb_put(skb, 1); /* We'll set the size later below */
2520 skb_put_u8(skb, WLAN_EID_EXT_HE_CAPABILITY);
2521
2522 /* Fixed data */
2523 skb_put_data(skb, &elem, sizeof(elem));
2524
2525 skb_put_data(skb, &he_cap->he_mcs_nss_supp, n);
2526
2527 /* Check if PPE Threshold should be present */
2528 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2529 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2530 goto end;
2531
2532 /*
2533 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2534 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2535 */
2536 n = hweight8(he_cap->ppe_thres[0] &
2537 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2538 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2539 IEEE80211_PPE_THRES_NSS_POS));
2540
2541 /*
2542 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2543 * total size.
2544 */
2545 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2546 n = DIV_ROUND_UP(n, 8);
2547
2548 /* Copy PPE Thresholds */
2549 skb_put_data(skb, &he_cap->ppe_thres, n);
2550
2551end:
2552 *len = skb_tail_pointer(skb) - len - 1;
2553 return 0;
2554}
2555
2556int ieee80211_put_he_6ghz_cap(struct sk_buff *skb,
2557 struct ieee80211_sub_if_data *sdata,
2558 enum ieee80211_smps_mode smps_mode)
2559{
2560 struct ieee80211_supported_band *sband;
2561 const struct ieee80211_sband_iftype_data *iftd;
2562 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2563 __le16 cap;
2564
2565 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2566 BIT(NL80211_BAND_6GHZ),
2567 IEEE80211_CHAN_NO_HE))
2568 return 0;
2569
2570 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2571
2572 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2573 if (!iftd)
2574 return 0;
2575
2576 /* Check for device HE 6 GHz capability before adding element */
2577 if (!iftd->he_6ghz_capa.capa)
2578 return 0;
2579
2580 cap = iftd->he_6ghz_capa.capa;
2581 cap &= cpu_to_le16(~IEEE80211_HE_6GHZ_CAP_SM_PS);
2582
2583 switch (smps_mode) {
2584 case IEEE80211_SMPS_AUTOMATIC:
2585 case IEEE80211_SMPS_NUM_MODES:
2586 WARN_ON(1);
2587 fallthrough;
2588 case IEEE80211_SMPS_OFF:
2589 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2590 IEEE80211_HE_6GHZ_CAP_SM_PS);
2591 break;
2592 case IEEE80211_SMPS_STATIC:
2593 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2594 IEEE80211_HE_6GHZ_CAP_SM_PS);
2595 break;
2596 case IEEE80211_SMPS_DYNAMIC:
2597 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2598 IEEE80211_HE_6GHZ_CAP_SM_PS);
2599 break;
2600 }
2601
2602 if (skb_tailroom(skb) < 2 + 1 + sizeof(cap))
2603 return -ENOBUFS;
2604
2605 skb_put_u8(skb, WLAN_EID_EXTENSION);
2606 skb_put_u8(skb, 1 + sizeof(cap));
2607 skb_put_u8(skb, WLAN_EID_EXT_HE_6GHZ_CAPA);
2608 skb_put_data(skb, &cap, sizeof(cap));
2609 return 0;
2610}
2611
2612u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2613 const struct cfg80211_chan_def *chandef,
2614 u16 prot_mode, bool rifs_mode)
2615{
2616 struct ieee80211_ht_operation *ht_oper;
2617 /* Build HT Information */
2618 *pos++ = WLAN_EID_HT_OPERATION;
2619 *pos++ = sizeof(struct ieee80211_ht_operation);
2620 ht_oper = (struct ieee80211_ht_operation *)pos;
2621 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2622 chandef->chan->center_freq);
2623 switch (chandef->width) {
2624 case NL80211_CHAN_WIDTH_160:
2625 case NL80211_CHAN_WIDTH_80P80:
2626 case NL80211_CHAN_WIDTH_80:
2627 case NL80211_CHAN_WIDTH_40:
2628 if (chandef->center_freq1 > chandef->chan->center_freq)
2629 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2630 else
2631 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2632 break;
2633 case NL80211_CHAN_WIDTH_320:
2634 /* HT information element should not be included on 6GHz */
2635 WARN_ON(1);
2636 return pos;
2637 default:
2638 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2639 break;
2640 }
2641 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2642 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2643 chandef->width != NL80211_CHAN_WIDTH_20)
2644 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2645
2646 if (rifs_mode)
2647 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2648
2649 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2650 ht_oper->stbc_param = 0x0000;
2651
2652 /* It seems that Basic MCS set and Supported MCS set
2653 are identical for the first 10 bytes */
2654 memset(&ht_oper->basic_set, 0, 16);
2655 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2656
2657 return pos + sizeof(struct ieee80211_ht_operation);
2658}
2659
2660void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2661 const struct cfg80211_chan_def *chandef)
2662{
2663 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2664 *pos++ = 3; /* IE length */
2665 /* New channel width */
2666 switch (chandef->width) {
2667 case NL80211_CHAN_WIDTH_80:
2668 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2669 break;
2670 case NL80211_CHAN_WIDTH_160:
2671 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2672 break;
2673 case NL80211_CHAN_WIDTH_80P80:
2674 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2675 break;
2676 case NL80211_CHAN_WIDTH_320:
2677 /* The behavior is not defined for 320 MHz channels */
2678 WARN_ON(1);
2679 fallthrough;
2680 default:
2681 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2682 }
2683
2684 /* new center frequency segment 0 */
2685 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2686 /* new center frequency segment 1 */
2687 if (chandef->center_freq2)
2688 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2689 else
2690 *pos++ = 0;
2691}
2692
2693u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2694 const struct cfg80211_chan_def *chandef)
2695{
2696 struct ieee80211_vht_operation *vht_oper;
2697
2698 *pos++ = WLAN_EID_VHT_OPERATION;
2699 *pos++ = sizeof(struct ieee80211_vht_operation);
2700 vht_oper = (struct ieee80211_vht_operation *)pos;
2701 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2702 chandef->center_freq1);
2703 if (chandef->center_freq2)
2704 vht_oper->center_freq_seg1_idx =
2705 ieee80211_frequency_to_channel(chandef->center_freq2);
2706 else
2707 vht_oper->center_freq_seg1_idx = 0x00;
2708
2709 switch (chandef->width) {
2710 case NL80211_CHAN_WIDTH_160:
2711 /*
2712 * Convert 160 MHz channel width to new style as interop
2713 * workaround.
2714 */
2715 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2716 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2717 if (chandef->chan->center_freq < chandef->center_freq1)
2718 vht_oper->center_freq_seg0_idx -= 8;
2719 else
2720 vht_oper->center_freq_seg0_idx += 8;
2721 break;
2722 case NL80211_CHAN_WIDTH_80P80:
2723 /*
2724 * Convert 80+80 MHz channel width to new style as interop
2725 * workaround.
2726 */
2727 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2728 break;
2729 case NL80211_CHAN_WIDTH_80:
2730 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2731 break;
2732 case NL80211_CHAN_WIDTH_320:
2733 /* VHT information element should not be included on 6GHz */
2734 WARN_ON(1);
2735 return pos;
2736 default:
2737 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2738 break;
2739 }
2740
2741 /* don't require special VHT peer rates */
2742 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2743
2744 return pos + sizeof(struct ieee80211_vht_operation);
2745}
2746
2747u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef)
2748{
2749 struct ieee80211_he_operation *he_oper;
2750 struct ieee80211_he_6ghz_oper *he_6ghz_op;
2751 u32 he_oper_params;
2752 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
2753
2754 if (chandef->chan->band == NL80211_BAND_6GHZ)
2755 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
2756
2757 *pos++ = WLAN_EID_EXTENSION;
2758 *pos++ = ie_len;
2759 *pos++ = WLAN_EID_EXT_HE_OPERATION;
2760
2761 he_oper_params = 0;
2762 he_oper_params |= u32_encode_bits(1023, /* disabled */
2763 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2764 he_oper_params |= u32_encode_bits(1,
2765 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2766 he_oper_params |= u32_encode_bits(1,
2767 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2768 if (chandef->chan->band == NL80211_BAND_6GHZ)
2769 he_oper_params |= u32_encode_bits(1,
2770 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
2771
2772 he_oper = (struct ieee80211_he_operation *)pos;
2773 he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2774
2775 /* don't require special HE peer rates */
2776 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2777 pos += sizeof(struct ieee80211_he_operation);
2778
2779 if (chandef->chan->band != NL80211_BAND_6GHZ)
2780 goto out;
2781
2782 /* TODO add VHT operational */
2783 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
2784 he_6ghz_op->minrate = 6; /* 6 Mbps */
2785 he_6ghz_op->primary =
2786 ieee80211_frequency_to_channel(chandef->chan->center_freq);
2787 he_6ghz_op->ccfs0 =
2788 ieee80211_frequency_to_channel(chandef->center_freq1);
2789 if (chandef->center_freq2)
2790 he_6ghz_op->ccfs1 =
2791 ieee80211_frequency_to_channel(chandef->center_freq2);
2792 else
2793 he_6ghz_op->ccfs1 = 0;
2794
2795 switch (chandef->width) {
2796 case NL80211_CHAN_WIDTH_320:
2797 /*
2798 * TODO: mesh operation is not defined over 6GHz 320 MHz
2799 * channels.
2800 */
2801 WARN_ON(1);
2802 break;
2803 case NL80211_CHAN_WIDTH_160:
2804 /* Convert 160 MHz channel width to new style as interop
2805 * workaround.
2806 */
2807 he_6ghz_op->control =
2808 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
2809 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
2810 if (chandef->chan->center_freq < chandef->center_freq1)
2811 he_6ghz_op->ccfs0 -= 8;
2812 else
2813 he_6ghz_op->ccfs0 += 8;
2814 fallthrough;
2815 case NL80211_CHAN_WIDTH_80P80:
2816 he_6ghz_op->control =
2817 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
2818 break;
2819 case NL80211_CHAN_WIDTH_80:
2820 he_6ghz_op->control =
2821 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
2822 break;
2823 case NL80211_CHAN_WIDTH_40:
2824 he_6ghz_op->control =
2825 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
2826 break;
2827 default:
2828 he_6ghz_op->control =
2829 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
2830 break;
2831 }
2832
2833 pos += sizeof(struct ieee80211_he_6ghz_oper);
2834
2835out:
2836 return pos;
2837}
2838
2839u8 *ieee80211_ie_build_eht_oper(u8 *pos, const struct cfg80211_chan_def *chandef,
2840 const struct ieee80211_sta_eht_cap *eht_cap)
2841
2842{
2843 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss =
2844 &eht_cap->eht_mcs_nss_supp.only_20mhz;
2845 struct ieee80211_eht_operation *eht_oper;
2846 struct ieee80211_eht_operation_info *eht_oper_info;
2847 u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional);
2848 u8 eht_oper_info_len =
2849 offsetof(struct ieee80211_eht_operation_info, optional);
2850 u8 chan_width = 0;
2851
2852 *pos++ = WLAN_EID_EXTENSION;
2853 *pos++ = 1 + eht_oper_len + eht_oper_info_len;
2854 *pos++ = WLAN_EID_EXT_EHT_OPERATION;
2855
2856 eht_oper = (struct ieee80211_eht_operation *)pos;
2857
2858 memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss));
2859 eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT;
2860 pos += eht_oper_len;
2861
2862 eht_oper_info =
2863 (struct ieee80211_eht_operation_info *)eht_oper->optional;
2864
2865 eht_oper_info->ccfs0 =
2866 ieee80211_frequency_to_channel(chandef->center_freq1);
2867 if (chandef->center_freq2)
2868 eht_oper_info->ccfs1 =
2869 ieee80211_frequency_to_channel(chandef->center_freq2);
2870 else
2871 eht_oper_info->ccfs1 = 0;
2872
2873 switch (chandef->width) {
2874 case NL80211_CHAN_WIDTH_320:
2875 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
2876 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
2877 if (chandef->chan->center_freq < chandef->center_freq1)
2878 eht_oper_info->ccfs0 -= 16;
2879 else
2880 eht_oper_info->ccfs0 += 16;
2881 break;
2882 case NL80211_CHAN_WIDTH_160:
2883 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
2884 if (chandef->chan->center_freq < chandef->center_freq1)
2885 eht_oper_info->ccfs0 -= 8;
2886 else
2887 eht_oper_info->ccfs0 += 8;
2888 fallthrough;
2889 case NL80211_CHAN_WIDTH_80P80:
2890 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ;
2891 break;
2892 case NL80211_CHAN_WIDTH_80:
2893 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ;
2894 break;
2895 case NL80211_CHAN_WIDTH_40:
2896 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ;
2897 break;
2898 default:
2899 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ;
2900 break;
2901 }
2902 eht_oper_info->control = chan_width;
2903 pos += eht_oper_info_len;
2904
2905 /* TODO: eht_oper_info->optional */
2906
2907 return pos;
2908}
2909
2910bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2911 struct cfg80211_chan_def *chandef)
2912{
2913 enum nl80211_channel_type channel_type;
2914
2915 if (!ht_oper)
2916 return false;
2917
2918 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2919 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2920 channel_type = NL80211_CHAN_HT20;
2921 break;
2922 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2923 channel_type = NL80211_CHAN_HT40PLUS;
2924 break;
2925 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2926 channel_type = NL80211_CHAN_HT40MINUS;
2927 break;
2928 default:
2929 return false;
2930 }
2931
2932 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2933 return true;
2934}
2935
2936bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
2937 const struct ieee80211_vht_operation *oper,
2938 const struct ieee80211_ht_operation *htop,
2939 struct cfg80211_chan_def *chandef)
2940{
2941 struct cfg80211_chan_def new = *chandef;
2942 int cf0, cf1;
2943 int ccfs0, ccfs1, ccfs2;
2944 int ccf0, ccf1;
2945 u32 vht_cap;
2946 bool support_80_80 = false;
2947 bool support_160 = false;
2948 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
2949 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
2950 u8 supp_chwidth = u32_get_bits(vht_cap_info,
2951 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
2952
2953 if (!oper || !htop)
2954 return false;
2955
2956 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
2957 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
2958 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
2959 support_80_80 = ((vht_cap &
2960 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
2961 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
2962 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
2963 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
2964 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
2965 ccfs0 = oper->center_freq_seg0_idx;
2966 ccfs1 = oper->center_freq_seg1_idx;
2967 ccfs2 = (le16_to_cpu(htop->operation_mode) &
2968 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2969 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2970
2971 ccf0 = ccfs0;
2972
2973 /* if not supported, parse as though we didn't understand it */
2974 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2975 ext_nss_bw_supp = 0;
2976
2977 /*
2978 * Cf. IEEE 802.11 Table 9-250
2979 *
2980 * We really just consider that because it's inefficient to connect
2981 * at a higher bandwidth than we'll actually be able to use.
2982 */
2983 switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
2984 default:
2985 case 0x00:
2986 ccf1 = 0;
2987 support_160 = false;
2988 support_80_80 = false;
2989 break;
2990 case 0x01:
2991 support_80_80 = false;
2992 fallthrough;
2993 case 0x02:
2994 case 0x03:
2995 ccf1 = ccfs2;
2996 break;
2997 case 0x10:
2998 ccf1 = ccfs1;
2999 break;
3000 case 0x11:
3001 case 0x12:
3002 if (!ccfs1)
3003 ccf1 = ccfs2;
3004 else
3005 ccf1 = ccfs1;
3006 break;
3007 case 0x13:
3008 case 0x20:
3009 case 0x23:
3010 ccf1 = ccfs1;
3011 break;
3012 }
3013
3014 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3015 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3016
3017 switch (oper->chan_width) {
3018 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3019 /* just use HT information directly */
3020 break;
3021 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3022 new.width = NL80211_CHAN_WIDTH_80;
3023 new.center_freq1 = cf0;
3024 /* If needed, adjust based on the newer interop workaround. */
3025 if (ccf1) {
3026 unsigned int diff;
3027
3028 diff = abs(ccf1 - ccf0);
3029 if ((diff == 8) && support_160) {
3030 new.width = NL80211_CHAN_WIDTH_160;
3031 new.center_freq1 = cf1;
3032 } else if ((diff > 8) && support_80_80) {
3033 new.width = NL80211_CHAN_WIDTH_80P80;
3034 new.center_freq2 = cf1;
3035 }
3036 }
3037 break;
3038 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3039 /* deprecated encoding */
3040 new.width = NL80211_CHAN_WIDTH_160;
3041 new.center_freq1 = cf0;
3042 break;
3043 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3044 /* deprecated encoding */
3045 new.width = NL80211_CHAN_WIDTH_80P80;
3046 new.center_freq1 = cf0;
3047 new.center_freq2 = cf1;
3048 break;
3049 default:
3050 return false;
3051 }
3052
3053 if (!cfg80211_chandef_valid(&new))
3054 return false;
3055
3056 *chandef = new;
3057 return true;
3058}
3059
3060void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info,
3061 struct cfg80211_chan_def *chandef)
3062{
3063 chandef->center_freq1 =
3064 ieee80211_channel_to_frequency(info->ccfs0,
3065 chandef->chan->band);
3066
3067 switch (u8_get_bits(info->control,
3068 IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3069 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3070 chandef->width = NL80211_CHAN_WIDTH_20;
3071 break;
3072 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3073 chandef->width = NL80211_CHAN_WIDTH_40;
3074 break;
3075 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3076 chandef->width = NL80211_CHAN_WIDTH_80;
3077 break;
3078 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3079 chandef->width = NL80211_CHAN_WIDTH_160;
3080 chandef->center_freq1 =
3081 ieee80211_channel_to_frequency(info->ccfs1,
3082 chandef->chan->band);
3083 break;
3084 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3085 chandef->width = NL80211_CHAN_WIDTH_320;
3086 chandef->center_freq1 =
3087 ieee80211_channel_to_frequency(info->ccfs1,
3088 chandef->chan->band);
3089 break;
3090 }
3091}
3092
3093bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_local *local,
3094 const struct ieee80211_he_operation *he_oper,
3095 const struct ieee80211_eht_operation *eht_oper,
3096 struct cfg80211_chan_def *chandef)
3097{
3098 struct cfg80211_chan_def he_chandef = *chandef;
3099 const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3100 u32 freq;
3101
3102 if (chandef->chan->band != NL80211_BAND_6GHZ)
3103 return true;
3104
3105 if (!he_oper)
3106 return false;
3107
3108 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3109 if (!he_6ghz_oper)
3110 return false;
3111
3112 /*
3113 * The EHT operation IE does not contain the primary channel so the
3114 * primary channel frequency should be taken from the 6 GHz operation
3115 * information.
3116 */
3117 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3118 NL80211_BAND_6GHZ);
3119 he_chandef.chan = ieee80211_get_channel(local->hw.wiphy, freq);
3120
3121 if (!he_chandef.chan)
3122 return false;
3123
3124 if (!eht_oper ||
3125 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3126 switch (u8_get_bits(he_6ghz_oper->control,
3127 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3128 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3129 he_chandef.width = NL80211_CHAN_WIDTH_20;
3130 break;
3131 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3132 he_chandef.width = NL80211_CHAN_WIDTH_40;
3133 break;
3134 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3135 he_chandef.width = NL80211_CHAN_WIDTH_80;
3136 break;
3137 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3138 he_chandef.width = NL80211_CHAN_WIDTH_80;
3139 if (!he_6ghz_oper->ccfs1)
3140 break;
3141 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8)
3142 he_chandef.width = NL80211_CHAN_WIDTH_160;
3143 else
3144 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3145 break;
3146 }
3147
3148 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3149 he_chandef.center_freq1 =
3150 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3151 NL80211_BAND_6GHZ);
3152 } else {
3153 he_chandef.center_freq1 =
3154 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3155 NL80211_BAND_6GHZ);
3156 he_chandef.center_freq2 =
3157 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3158 NL80211_BAND_6GHZ);
3159 }
3160 } else {
3161 ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
3162 &he_chandef);
3163 he_chandef.punctured =
3164 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper);
3165 }
3166
3167 if (!cfg80211_chandef_valid(&he_chandef))
3168 return false;
3169
3170 *chandef = he_chandef;
3171
3172 return true;
3173}
3174
3175bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3176 struct cfg80211_chan_def *chandef)
3177{
3178 u32 oper_freq;
3179
3180 if (!oper)
3181 return false;
3182
3183 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3184 case IEEE80211_S1G_CHANWIDTH_1MHZ:
3185 chandef->width = NL80211_CHAN_WIDTH_1;
3186 break;
3187 case IEEE80211_S1G_CHANWIDTH_2MHZ:
3188 chandef->width = NL80211_CHAN_WIDTH_2;
3189 break;
3190 case IEEE80211_S1G_CHANWIDTH_4MHZ:
3191 chandef->width = NL80211_CHAN_WIDTH_4;
3192 break;
3193 case IEEE80211_S1G_CHANWIDTH_8MHZ:
3194 chandef->width = NL80211_CHAN_WIDTH_8;
3195 break;
3196 case IEEE80211_S1G_CHANWIDTH_16MHZ:
3197 chandef->width = NL80211_CHAN_WIDTH_16;
3198 break;
3199 default:
3200 return false;
3201 }
3202
3203 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3204 NL80211_BAND_S1GHZ);
3205 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3206 chandef->freq1_offset = oper_freq % 1000;
3207
3208 return true;
3209}
3210
3211int ieee80211_put_srates_elem(struct sk_buff *skb,
3212 const struct ieee80211_supported_band *sband,
3213 u32 basic_rates, u32 rate_flags, u32 masked_rates,
3214 u8 element_id)
3215{
3216 u8 i, rates, skip;
3217
3218 rates = 0;
3219 for (i = 0; i < sband->n_bitrates; i++) {
3220 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3221 continue;
3222 if (masked_rates & BIT(i))
3223 continue;
3224 rates++;
3225 }
3226
3227 if (element_id == WLAN_EID_SUPP_RATES) {
3228 rates = min_t(u8, rates, 8);
3229 skip = 0;
3230 } else {
3231 skip = 8;
3232 if (rates <= skip)
3233 return 0;
3234 rates -= skip;
3235 }
3236
3237 if (skb_tailroom(skb) < rates + 2)
3238 return -ENOBUFS;
3239
3240 skb_put_u8(skb, element_id);
3241 skb_put_u8(skb, rates);
3242
3243 for (i = 0; i < sband->n_bitrates && rates; i++) {
3244 int rate;
3245 u8 basic;
3246
3247 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3248 continue;
3249 if (masked_rates & BIT(i))
3250 continue;
3251
3252 if (skip > 0) {
3253 skip--;
3254 continue;
3255 }
3256
3257 basic = basic_rates & BIT(i) ? 0x80 : 0;
3258
3259 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
3260 skb_put_u8(skb, basic | (u8)rate);
3261 rates--;
3262 }
3263
3264 WARN(rates > 0, "rates confused: rates:%d, element:%d\n",
3265 rates, element_id);
3266
3267 return 0;
3268}
3269
3270int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3271{
3272 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3273
3274 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
3275 return 0;
3276
3277 return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
3278}
3279EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3280
3281u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3282{
3283 if (!mcs)
3284 return 1;
3285
3286 /* TODO: consider rx_highest */
3287
3288 if (mcs->rx_mask[3])
3289 return 4;
3290 if (mcs->rx_mask[2])
3291 return 3;
3292 if (mcs->rx_mask[1])
3293 return 2;
3294 return 1;
3295}
3296
3297/**
3298 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3299 * @local: mac80211 hw info struct
3300 * @status: RX status
3301 * @mpdu_len: total MPDU length (including FCS)
3302 * @mpdu_offset: offset into MPDU to calculate timestamp at
3303 *
3304 * This function calculates the RX timestamp at the given MPDU offset, taking
3305 * into account what the RX timestamp was. An offset of 0 will just normalize
3306 * the timestamp to TSF at beginning of MPDU reception.
3307 *
3308 * Returns: the calculated timestamp
3309 */
3310u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3311 struct ieee80211_rx_status *status,
3312 unsigned int mpdu_len,
3313 unsigned int mpdu_offset)
3314{
3315 u64 ts = status->mactime;
3316 bool mactime_plcp_start;
3317 struct rate_info ri;
3318 u16 rate;
3319 u8 n_ltf;
3320
3321 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3322 return 0;
3323
3324 mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) ==
3325 RX_FLAG_MACTIME_PLCP_START;
3326
3327 memset(&ri, 0, sizeof(ri));
3328
3329 ri.bw = status->bw;
3330
3331 /* Fill cfg80211 rate info */
3332 switch (status->encoding) {
3333 case RX_ENC_EHT:
3334 ri.flags |= RATE_INFO_FLAGS_EHT_MCS;
3335 ri.mcs = status->rate_idx;
3336 ri.nss = status->nss;
3337 ri.eht_ru_alloc = status->eht.ru;
3338 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3339 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3340 /* TODO/FIXME: is this right? handle other PPDUs */
3341 if (mactime_plcp_start) {
3342 mpdu_offset += 2;
3343 ts += 36;
3344 }
3345 break;
3346 case RX_ENC_HE:
3347 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3348 ri.mcs = status->rate_idx;
3349 ri.nss = status->nss;
3350 ri.he_ru_alloc = status->he_ru;
3351 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3352 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3353
3354 /*
3355 * See P802.11ax_D6.0, section 27.3.4 for
3356 * VHT PPDU format.
3357 */
3358 if (mactime_plcp_start) {
3359 mpdu_offset += 2;
3360 ts += 36;
3361
3362 /*
3363 * TODO:
3364 * For HE MU PPDU, add the HE-SIG-B.
3365 * For HE ER PPDU, add 8us for the HE-SIG-A.
3366 * For HE TB PPDU, add 4us for the HE-STF.
3367 * Add the HE-LTF durations - variable.
3368 */
3369 }
3370
3371 break;
3372 case RX_ENC_HT:
3373 ri.mcs = status->rate_idx;
3374 ri.flags |= RATE_INFO_FLAGS_MCS;
3375 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3376 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3377
3378 /*
3379 * See P802.11REVmd_D3.0, section 19.3.2 for
3380 * HT PPDU format.
3381 */
3382 if (mactime_plcp_start) {
3383 mpdu_offset += 2;
3384 if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3385 ts += 24;
3386 else
3387 ts += 32;
3388
3389 /*
3390 * Add Data HT-LTFs per streams
3391 * TODO: add Extension HT-LTFs, 4us per LTF
3392 */
3393 n_ltf = ((ri.mcs >> 3) & 3) + 1;
3394 n_ltf = n_ltf == 3 ? 4 : n_ltf;
3395 ts += n_ltf * 4;
3396 }
3397
3398 break;
3399 case RX_ENC_VHT:
3400 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3401 ri.mcs = status->rate_idx;
3402 ri.nss = status->nss;
3403 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3404 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3405
3406 /*
3407 * See P802.11REVmd_D3.0, section 21.3.2 for
3408 * VHT PPDU format.
3409 */
3410 if (mactime_plcp_start) {
3411 mpdu_offset += 2;
3412 ts += 36;
3413
3414 /*
3415 * Add VHT-LTFs per streams
3416 */
3417 n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3418 ri.nss + 1 : ri.nss;
3419 ts += 4 * n_ltf;
3420 }
3421
3422 break;
3423 default:
3424 WARN_ON(1);
3425 fallthrough;
3426 case RX_ENC_LEGACY: {
3427 struct ieee80211_supported_band *sband;
3428
3429 sband = local->hw.wiphy->bands[status->band];
3430 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
3431
3432 if (mactime_plcp_start) {
3433 if (status->band == NL80211_BAND_5GHZ) {
3434 ts += 20;
3435 mpdu_offset += 2;
3436 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3437 ts += 96;
3438 } else {
3439 ts += 192;
3440 }
3441 }
3442 break;
3443 }
3444 }
3445
3446 rate = cfg80211_calculate_bitrate(&ri);
3447 if (WARN_ONCE(!rate,
3448 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3449 (unsigned long long)status->flag, status->rate_idx,
3450 status->nss))
3451 return 0;
3452
3453 /* rewind from end of MPDU */
3454 if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END)
3455 ts -= mpdu_len * 8 * 10 / rate;
3456
3457 ts += mpdu_offset * 8 * 10 / rate;
3458
3459 return ts;
3460}
3461
3462/* Cancel CAC for the interfaces under the specified @local. If @ctx is
3463 * also provided, only the interfaces using that ctx will be canceled.
3464 */
3465void ieee80211_dfs_cac_cancel(struct ieee80211_local *local,
3466 struct ieee80211_chanctx *ctx)
3467{
3468 struct ieee80211_sub_if_data *sdata;
3469 struct cfg80211_chan_def chandef;
3470 struct ieee80211_link_data *link;
3471 struct ieee80211_chanctx_conf *chanctx_conf;
3472 unsigned int link_id;
3473
3474 lockdep_assert_wiphy(local->hw.wiphy);
3475
3476 list_for_each_entry(sdata, &local->interfaces, list) {
3477 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
3478 link_id++) {
3479 link = sdata_dereference(sdata->link[link_id],
3480 sdata);
3481 if (!link)
3482 continue;
3483
3484 chanctx_conf = sdata_dereference(link->conf->chanctx_conf,
3485 sdata);
3486 if (ctx && &ctx->conf != chanctx_conf)
3487 continue;
3488
3489 wiphy_delayed_work_cancel(local->hw.wiphy,
3490 &link->dfs_cac_timer_work);
3491
3492 if (!sdata->wdev.links[link_id].cac_started)
3493 continue;
3494
3495 chandef = link->conf->chanreq.oper;
3496 ieee80211_link_release_channel(link);
3497 cfg80211_cac_event(sdata->dev, &chandef,
3498 NL80211_RADAR_CAC_ABORTED,
3499 GFP_KERNEL, link_id);
3500 }
3501 }
3502}
3503
3504void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy,
3505 struct wiphy_work *work)
3506{
3507 struct ieee80211_local *local =
3508 container_of(work, struct ieee80211_local, radar_detected_work);
3509 struct cfg80211_chan_def chandef;
3510 struct ieee80211_chanctx *ctx;
3511
3512 lockdep_assert_wiphy(local->hw.wiphy);
3513
3514 list_for_each_entry(ctx, &local->chanctx_list, list) {
3515 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3516 continue;
3517
3518 if (!ctx->radar_detected)
3519 continue;
3520
3521 ctx->radar_detected = false;
3522
3523 chandef = ctx->conf.def;
3524
3525 ieee80211_dfs_cac_cancel(local, ctx);
3526 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3527 }
3528}
3529
3530static void
3531ieee80211_radar_mark_chan_ctx_iterator(struct ieee80211_hw *hw,
3532 struct ieee80211_chanctx_conf *chanctx_conf,
3533 void *data)
3534{
3535 struct ieee80211_chanctx *ctx =
3536 container_of(chanctx_conf, struct ieee80211_chanctx,
3537 conf);
3538
3539 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3540 return;
3541
3542 if (data && data != chanctx_conf)
3543 return;
3544
3545 ctx->radar_detected = true;
3546}
3547
3548void ieee80211_radar_detected(struct ieee80211_hw *hw,
3549 struct ieee80211_chanctx_conf *chanctx_conf)
3550{
3551 struct ieee80211_local *local = hw_to_local(hw);
3552
3553 trace_api_radar_detected(local);
3554
3555 ieee80211_iter_chan_contexts_atomic(hw, ieee80211_radar_mark_chan_ctx_iterator,
3556 chanctx_conf);
3557
3558 wiphy_work_queue(hw->wiphy, &local->radar_detected_work);
3559}
3560EXPORT_SYMBOL(ieee80211_radar_detected);
3561
3562void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c,
3563 struct ieee80211_conn_settings *conn)
3564{
3565 enum nl80211_chan_width new_primary_width;
3566 struct ieee80211_conn_settings _ignored = {};
3567
3568 /* allow passing NULL if caller doesn't care */
3569 if (!conn)
3570 conn = &_ignored;
3571
3572again:
3573 /* no-HT indicates nothing to do */
3574 new_primary_width = NL80211_CHAN_WIDTH_20_NOHT;
3575
3576 switch (c->width) {
3577 default:
3578 case NL80211_CHAN_WIDTH_20_NOHT:
3579 WARN_ON_ONCE(1);
3580 fallthrough;
3581 case NL80211_CHAN_WIDTH_20:
3582 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3583 conn->mode = IEEE80211_CONN_MODE_LEGACY;
3584 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3585 c->punctured = 0;
3586 break;
3587 case NL80211_CHAN_WIDTH_40:
3588 c->width = NL80211_CHAN_WIDTH_20;
3589 c->center_freq1 = c->chan->center_freq;
3590 if (conn->mode == IEEE80211_CONN_MODE_VHT)
3591 conn->mode = IEEE80211_CONN_MODE_HT;
3592 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3593 c->punctured = 0;
3594 break;
3595 case NL80211_CHAN_WIDTH_80:
3596 new_primary_width = NL80211_CHAN_WIDTH_40;
3597 if (conn->mode == IEEE80211_CONN_MODE_VHT)
3598 conn->mode = IEEE80211_CONN_MODE_HT;
3599 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_40;
3600 break;
3601 case NL80211_CHAN_WIDTH_80P80:
3602 c->center_freq2 = 0;
3603 c->width = NL80211_CHAN_WIDTH_80;
3604 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
3605 break;
3606 case NL80211_CHAN_WIDTH_160:
3607 new_primary_width = NL80211_CHAN_WIDTH_80;
3608 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
3609 break;
3610 case NL80211_CHAN_WIDTH_320:
3611 new_primary_width = NL80211_CHAN_WIDTH_160;
3612 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
3613 break;
3614 case NL80211_CHAN_WIDTH_1:
3615 case NL80211_CHAN_WIDTH_2:
3616 case NL80211_CHAN_WIDTH_4:
3617 case NL80211_CHAN_WIDTH_8:
3618 case NL80211_CHAN_WIDTH_16:
3619 WARN_ON_ONCE(1);
3620 /* keep c->width */
3621 conn->mode = IEEE80211_CONN_MODE_S1G;
3622 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3623 break;
3624 case NL80211_CHAN_WIDTH_5:
3625 case NL80211_CHAN_WIDTH_10:
3626 WARN_ON_ONCE(1);
3627 /* keep c->width */
3628 conn->mode = IEEE80211_CONN_MODE_LEGACY;
3629 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3630 break;
3631 }
3632
3633 if (new_primary_width != NL80211_CHAN_WIDTH_20_NOHT) {
3634 c->center_freq1 = cfg80211_chandef_primary(c, new_primary_width,
3635 &c->punctured);
3636 c->width = new_primary_width;
3637 }
3638
3639 /*
3640 * With an 80 MHz channel, we might have the puncturing in the primary
3641 * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width.
3642 * In that case, downgrade again.
3643 */
3644 if (!cfg80211_chandef_valid(c) && c->punctured)
3645 goto again;
3646
3647 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3648}
3649
3650/*
3651 * Returns true if smps_mode_new is strictly more restrictive than
3652 * smps_mode_old.
3653 */
3654bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3655 enum ieee80211_smps_mode smps_mode_new)
3656{
3657 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3658 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3659 return false;
3660
3661 switch (smps_mode_old) {
3662 case IEEE80211_SMPS_STATIC:
3663 return false;
3664 case IEEE80211_SMPS_DYNAMIC:
3665 return smps_mode_new == IEEE80211_SMPS_STATIC;
3666 case IEEE80211_SMPS_OFF:
3667 return smps_mode_new != IEEE80211_SMPS_OFF;
3668 default:
3669 WARN_ON(1);
3670 }
3671
3672 return false;
3673}
3674
3675int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3676 struct cfg80211_csa_settings *csa_settings)
3677{
3678 struct sk_buff *skb;
3679 struct ieee80211_mgmt *mgmt;
3680 struct ieee80211_local *local = sdata->local;
3681 int freq;
3682 int hdr_len = offsetofend(struct ieee80211_mgmt,
3683 u.action.u.chan_switch);
3684 u8 *pos;
3685
3686 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3687 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3688 return -EOPNOTSUPP;
3689
3690 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3691 5 + /* channel switch announcement element */
3692 3 + /* secondary channel offset element */
3693 5 + /* wide bandwidth channel switch announcement */
3694 8); /* mesh channel switch parameters element */
3695 if (!skb)
3696 return -ENOMEM;
3697
3698 skb_reserve(skb, local->tx_headroom);
3699 mgmt = skb_put_zero(skb, hdr_len);
3700 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3701 IEEE80211_STYPE_ACTION);
3702
3703 eth_broadcast_addr(mgmt->da);
3704 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3705 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3706 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3707 } else {
3708 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3709 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3710 }
3711 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3712 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3713 pos = skb_put(skb, 5);
3714 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3715 *pos++ = 3; /* IE length */
3716 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3717 freq = csa_settings->chandef.chan->center_freq;
3718 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3719 *pos++ = csa_settings->count; /* count */
3720
3721 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3722 enum nl80211_channel_type ch_type;
3723
3724 skb_put(skb, 3);
3725 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3726 *pos++ = 1; /* IE length */
3727 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3728 if (ch_type == NL80211_CHAN_HT40PLUS)
3729 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3730 else
3731 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3732 }
3733
3734 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3735 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3736
3737 skb_put(skb, 8);
3738 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3739 *pos++ = 6; /* IE length */
3740 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3741 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3742 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3743 *pos++ |= csa_settings->block_tx ?
3744 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3745 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3746 pos += 2;
3747 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3748 pos += 2;
3749 }
3750
3751 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3752 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3753 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3754 skb_put(skb, 5);
3755 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3756 }
3757
3758 ieee80211_tx_skb(sdata, skb);
3759 return 0;
3760}
3761
3762static bool
3763ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3764{
3765 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3766 int skip;
3767
3768 if (end > 0)
3769 return false;
3770
3771 /* One shot NOA */
3772 if (data->count[i] == 1)
3773 return false;
3774
3775 if (data->desc[i].interval == 0)
3776 return false;
3777
3778 /* End time is in the past, check for repetitions */
3779 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3780 if (data->count[i] < 255) {
3781 if (data->count[i] <= skip) {
3782 data->count[i] = 0;
3783 return false;
3784 }
3785
3786 data->count[i] -= skip;
3787 }
3788
3789 data->desc[i].start += skip * data->desc[i].interval;
3790
3791 return true;
3792}
3793
3794static bool
3795ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3796 s32 *offset)
3797{
3798 bool ret = false;
3799 int i;
3800
3801 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3802 s32 cur;
3803
3804 if (!data->count[i])
3805 continue;
3806
3807 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3808 ret = true;
3809
3810 cur = data->desc[i].start - tsf;
3811 if (cur > *offset)
3812 continue;
3813
3814 cur = data->desc[i].start + data->desc[i].duration - tsf;
3815 if (cur > *offset)
3816 *offset = cur;
3817 }
3818
3819 return ret;
3820}
3821
3822static u32
3823ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3824{
3825 s32 offset = 0;
3826 int tries = 0;
3827 /*
3828 * arbitrary limit, used to avoid infinite loops when combined NoA
3829 * descriptors cover the full time period.
3830 */
3831 int max_tries = 5;
3832
3833 ieee80211_extend_absent_time(data, tsf, &offset);
3834 do {
3835 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3836 break;
3837
3838 tries++;
3839 } while (tries < max_tries);
3840
3841 return offset;
3842}
3843
3844void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3845{
3846 u32 next_offset = BIT(31) - 1;
3847 int i;
3848
3849 data->absent = 0;
3850 data->has_next_tsf = false;
3851 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3852 s32 start;
3853
3854 if (!data->count[i])
3855 continue;
3856
3857 ieee80211_extend_noa_desc(data, tsf, i);
3858 start = data->desc[i].start - tsf;
3859 if (start <= 0)
3860 data->absent |= BIT(i);
3861
3862 if (next_offset > start)
3863 next_offset = start;
3864
3865 data->has_next_tsf = true;
3866 }
3867
3868 if (data->absent)
3869 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3870
3871 data->next_tsf = tsf + next_offset;
3872}
3873EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3874
3875int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3876 struct ieee80211_noa_data *data, u32 tsf)
3877{
3878 int ret = 0;
3879 int i;
3880
3881 memset(data, 0, sizeof(*data));
3882
3883 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3884 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3885
3886 if (!desc->count || !desc->duration)
3887 continue;
3888
3889 data->count[i] = desc->count;
3890 data->desc[i].start = le32_to_cpu(desc->start_time);
3891 data->desc[i].duration = le32_to_cpu(desc->duration);
3892 data->desc[i].interval = le32_to_cpu(desc->interval);
3893
3894 if (data->count[i] > 1 &&
3895 data->desc[i].interval < data->desc[i].duration)
3896 continue;
3897
3898 ieee80211_extend_noa_desc(data, tsf, i);
3899 ret++;
3900 }
3901
3902 if (ret)
3903 ieee80211_update_p2p_noa(data, tsf);
3904
3905 return ret;
3906}
3907EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3908
3909void ieee80211_recalc_dtim(struct ieee80211_local *local,
3910 struct ieee80211_sub_if_data *sdata)
3911{
3912 u64 tsf = drv_get_tsf(local, sdata);
3913 u64 dtim_count = 0;
3914 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3915 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3916 struct ps_data *ps;
3917 u8 bcns_from_dtim;
3918
3919 if (tsf == -1ULL || !beacon_int || !dtim_period)
3920 return;
3921
3922 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3923 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3924 if (!sdata->bss)
3925 return;
3926
3927 ps = &sdata->bss->ps;
3928 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3929 ps = &sdata->u.mesh.ps;
3930 } else {
3931 return;
3932 }
3933
3934 /*
3935 * actually finds last dtim_count, mac80211 will update in
3936 * __beacon_add_tim().
3937 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3938 */
3939 do_div(tsf, beacon_int);
3940 bcns_from_dtim = do_div(tsf, dtim_period);
3941 /* just had a DTIM */
3942 if (!bcns_from_dtim)
3943 dtim_count = 0;
3944 else
3945 dtim_count = dtim_period - bcns_from_dtim;
3946
3947 ps->dtim_count = dtim_count;
3948}
3949
3950static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3951 struct ieee80211_chanctx *ctx)
3952{
3953 struct ieee80211_link_data *link;
3954 u8 radar_detect = 0;
3955
3956 lockdep_assert_wiphy(local->hw.wiphy);
3957
3958 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3959 return 0;
3960
3961 list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
3962 if (link->reserved_radar_required)
3963 radar_detect |= BIT(link->reserved.oper.width);
3964
3965 /*
3966 * An in-place reservation context should not have any assigned vifs
3967 * until it replaces the other context.
3968 */
3969 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3970 !list_empty(&ctx->assigned_links));
3971
3972 list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
3973 if (!link->radar_required)
3974 continue;
3975
3976 radar_detect |=
3977 BIT(link->conf->chanreq.oper.width);
3978 }
3979
3980 return radar_detect;
3981}
3982
3983static u32
3984__ieee80211_get_radio_mask(struct ieee80211_sub_if_data *sdata)
3985{
3986 struct ieee80211_bss_conf *link_conf;
3987 struct ieee80211_chanctx_conf *conf;
3988 unsigned int link_id;
3989 u32 mask = 0;
3990
3991 for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
3992 conf = sdata_dereference(link_conf->chanctx_conf, sdata);
3993 if (!conf || conf->radio_idx < 0)
3994 continue;
3995
3996 mask |= BIT(conf->radio_idx);
3997 }
3998
3999 return mask;
4000}
4001
4002u32 ieee80211_get_radio_mask(struct wiphy *wiphy, struct net_device *dev)
4003{
4004 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4005
4006 return __ieee80211_get_radio_mask(sdata);
4007}
4008
4009static bool
4010ieee80211_sdata_uses_radio(struct ieee80211_sub_if_data *sdata, int radio_idx)
4011{
4012 if (radio_idx < 0)
4013 return true;
4014
4015 return __ieee80211_get_radio_mask(sdata) & BIT(radio_idx);
4016}
4017
4018static int
4019ieee80211_fill_ifcomb_params(struct ieee80211_local *local,
4020 struct iface_combination_params *params,
4021 const struct cfg80211_chan_def *chandef,
4022 struct ieee80211_sub_if_data *sdata)
4023{
4024 struct ieee80211_sub_if_data *sdata_iter;
4025 struct ieee80211_chanctx *ctx;
4026 int total = !!sdata;
4027
4028 list_for_each_entry(ctx, &local->chanctx_list, list) {
4029 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4030 continue;
4031
4032 if (params->radio_idx >= 0 &&
4033 ctx->conf.radio_idx != params->radio_idx)
4034 continue;
4035
4036 params->radar_detect |=
4037 ieee80211_chanctx_radar_detect(local, ctx);
4038
4039 if (chandef && ctx->mode != IEEE80211_CHANCTX_EXCLUSIVE &&
4040 cfg80211_chandef_compatible(chandef, &ctx->conf.def))
4041 continue;
4042
4043 params->num_different_channels++;
4044 }
4045
4046 list_for_each_entry(sdata_iter, &local->interfaces, list) {
4047 struct wireless_dev *wdev_iter;
4048
4049 wdev_iter = &sdata_iter->wdev;
4050
4051 if (sdata_iter == sdata ||
4052 !ieee80211_sdata_running(sdata_iter) ||
4053 cfg80211_iftype_allowed(local->hw.wiphy,
4054 wdev_iter->iftype, 0, 1))
4055 continue;
4056
4057 if (!ieee80211_sdata_uses_radio(sdata_iter, params->radio_idx))
4058 continue;
4059
4060 params->iftype_num[wdev_iter->iftype]++;
4061 total++;
4062 }
4063
4064 return total;
4065}
4066
4067int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4068 const struct cfg80211_chan_def *chandef,
4069 enum ieee80211_chanctx_mode chanmode,
4070 u8 radar_detect, int radio_idx)
4071{
4072 bool shared = chanmode == IEEE80211_CHANCTX_SHARED;
4073 struct ieee80211_local *local = sdata->local;
4074 enum nl80211_iftype iftype = sdata->wdev.iftype;
4075 struct iface_combination_params params = {
4076 .radar_detect = radar_detect,
4077 .radio_idx = radio_idx,
4078 };
4079 int total;
4080
4081 lockdep_assert_wiphy(local->hw.wiphy);
4082
4083 if (WARN_ON(hweight32(radar_detect) > 1))
4084 return -EINVAL;
4085
4086 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4087 !chandef->chan))
4088 return -EINVAL;
4089
4090 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4091 return -EINVAL;
4092
4093 if (sdata->vif.type == NL80211_IFTYPE_AP ||
4094 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4095 /*
4096 * always passing this is harmless, since it'll be the
4097 * same value that cfg80211 finds if it finds the same
4098 * interface ... and that's always allowed
4099 */
4100 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4101 }
4102
4103 /* Always allow software iftypes */
4104 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4105 if (radar_detect)
4106 return -EINVAL;
4107 return 0;
4108 }
4109
4110 if (chandef)
4111 params.num_different_channels = 1;
4112
4113 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4114 params.iftype_num[iftype] = 1;
4115
4116 total = ieee80211_fill_ifcomb_params(local, ¶ms,
4117 shared ? chandef : NULL,
4118 sdata);
4119 if (total == 1 && !params.radar_detect)
4120 return 0;
4121
4122 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
4123}
4124
4125static void
4126ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4127 void *data)
4128{
4129 u32 *max_num_different_channels = data;
4130
4131 *max_num_different_channels = max(*max_num_different_channels,
4132 c->num_different_channels);
4133}
4134
4135int ieee80211_max_num_channels(struct ieee80211_local *local, int radio_idx)
4136{
4137 u32 max_num_different_channels = 1;
4138 int err;
4139 struct iface_combination_params params = {
4140 .radio_idx = radio_idx,
4141 };
4142
4143 lockdep_assert_wiphy(local->hw.wiphy);
4144
4145 ieee80211_fill_ifcomb_params(local, ¶ms, NULL, NULL);
4146
4147 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
4148 ieee80211_iter_max_chans,
4149 &max_num_different_channels);
4150 if (err < 0)
4151 return err;
4152
4153 return max_num_different_channels;
4154}
4155
4156void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4157 struct ieee80211_sta_s1g_cap *caps,
4158 struct sk_buff *skb)
4159{
4160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4161 struct ieee80211_s1g_cap s1g_capab;
4162 u8 *pos;
4163 int i;
4164
4165 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4166 return;
4167
4168 if (!caps->s1g)
4169 return;
4170
4171 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4172 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4173
4174 /* override the capability info */
4175 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4176 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4177
4178 s1g_capab.capab_info[i] &= ~mask;
4179 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4180 }
4181
4182 /* then MCS and NSS set */
4183 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4184 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4185
4186 s1g_capab.supp_mcs_nss[i] &= ~mask;
4187 s1g_capab.supp_mcs_nss[i] |=
4188 ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4189 }
4190
4191 pos = skb_put(skb, 2 + sizeof(s1g_capab));
4192 *pos++ = WLAN_EID_S1G_CAPABILITIES;
4193 *pos++ = sizeof(s1g_capab);
4194
4195 memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4196}
4197
4198void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4199 struct sk_buff *skb)
4200{
4201 u8 *pos = skb_put(skb, 3);
4202
4203 *pos++ = WLAN_EID_AID_REQUEST;
4204 *pos++ = 1;
4205 *pos++ = 0;
4206}
4207
4208u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4209{
4210 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4211 *buf++ = 7; /* len */
4212 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4213 *buf++ = 0x50;
4214 *buf++ = 0xf2;
4215 *buf++ = 2; /* WME */
4216 *buf++ = 0; /* WME info */
4217 *buf++ = 1; /* WME ver */
4218 *buf++ = qosinfo; /* U-APSD no in use */
4219
4220 return buf;
4221}
4222
4223void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4224 unsigned long *frame_cnt,
4225 unsigned long *byte_cnt)
4226{
4227 struct txq_info *txqi = to_txq_info(txq);
4228 u32 frag_cnt = 0, frag_bytes = 0;
4229 struct sk_buff *skb;
4230
4231 skb_queue_walk(&txqi->frags, skb) {
4232 frag_cnt++;
4233 frag_bytes += skb->len;
4234 }
4235
4236 if (frame_cnt)
4237 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4238
4239 if (byte_cnt)
4240 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4241}
4242EXPORT_SYMBOL(ieee80211_txq_get_depth);
4243
4244const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4245 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4246 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4247 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4248 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4249};
4250
4251u16 ieee80211_encode_usf(int listen_interval)
4252{
4253 static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4254 u16 ui, usf = 0;
4255
4256 /* find greatest USF */
4257 while (usf < IEEE80211_MAX_USF) {
4258 if (listen_interval % listen_int_usf[usf + 1])
4259 break;
4260 usf += 1;
4261 }
4262 ui = listen_interval / listen_int_usf[usf];
4263
4264 /* error if there is a remainder. Should've been checked by user */
4265 WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4266 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4267 FIELD_PREP(LISTEN_INT_UI, ui);
4268
4269 return (u16) listen_interval;
4270}
4271
4272/* this may return more than ieee80211_put_eht_cap() will need */
4273u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata)
4274{
4275 const struct ieee80211_sta_he_cap *he_cap;
4276 const struct ieee80211_sta_eht_cap *eht_cap;
4277 struct ieee80211_supported_band *sband;
4278 bool is_ap;
4279 u8 n;
4280
4281 sband = ieee80211_get_sband(sdata);
4282 if (!sband)
4283 return 0;
4284
4285 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4286 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4287 if (!he_cap || !eht_cap)
4288 return 0;
4289
4290 is_ap = sdata->vif.type == NL80211_IFTYPE_AP;
4291
4292 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4293 &eht_cap->eht_cap_elem,
4294 is_ap);
4295 return 2 + 1 +
4296 sizeof(eht_cap->eht_cap_elem) + n +
4297 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4298 eht_cap->eht_cap_elem.phy_cap_info);
4299 return 0;
4300}
4301
4302int ieee80211_put_eht_cap(struct sk_buff *skb,
4303 struct ieee80211_sub_if_data *sdata,
4304 const struct ieee80211_supported_band *sband,
4305 const struct ieee80211_conn_settings *conn)
4306{
4307 const struct ieee80211_sta_he_cap *he_cap =
4308 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4309 const struct ieee80211_sta_eht_cap *eht_cap =
4310 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4311 bool for_ap = sdata->vif.type == NL80211_IFTYPE_AP;
4312 struct ieee80211_eht_cap_elem_fixed fixed;
4313 struct ieee80211_he_cap_elem he;
4314 u8 mcs_nss_len, ppet_len;
4315 u8 orig_mcs_nss_len;
4316 u8 ie_len;
4317
4318 if (!conn)
4319 conn = &ieee80211_conn_settings_unlimited;
4320
4321 /* Make sure we have place for the IE */
4322 if (!he_cap || !eht_cap)
4323 return 0;
4324
4325 orig_mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4326 &eht_cap->eht_cap_elem,
4327 for_ap);
4328
4329 ieee80211_get_adjusted_he_cap(conn, he_cap, &he);
4330
4331 fixed = eht_cap->eht_cap_elem;
4332
4333 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_80)
4334 fixed.phy_cap_info[6] &=
4335 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ;
4336
4337 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
4338 fixed.phy_cap_info[1] &=
4339 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_160MHZ_MASK;
4340 fixed.phy_cap_info[2] &=
4341 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_160MHZ_MASK;
4342 fixed.phy_cap_info[6] &=
4343 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ;
4344 }
4345
4346 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320) {
4347 fixed.phy_cap_info[0] &=
4348 ~IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
4349 fixed.phy_cap_info[1] &=
4350 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_320MHZ_MASK;
4351 fixed.phy_cap_info[2] &=
4352 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_320MHZ_MASK;
4353 fixed.phy_cap_info[6] &=
4354 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ;
4355 }
4356
4357 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20)
4358 fixed.phy_cap_info[0] &=
4359 ~IEEE80211_EHT_PHY_CAP0_242_TONE_RU_GT20MHZ;
4360
4361 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he, &fixed, for_ap);
4362 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4363 fixed.phy_cap_info);
4364
4365 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4366 if (skb_tailroom(skb) < ie_len)
4367 return -ENOBUFS;
4368
4369 skb_put_u8(skb, WLAN_EID_EXTENSION);
4370 skb_put_u8(skb, ie_len - 2);
4371 skb_put_u8(skb, WLAN_EID_EXT_EHT_CAPABILITY);
4372 skb_put_data(skb, &fixed, sizeof(fixed));
4373
4374 if (mcs_nss_len == 4 && orig_mcs_nss_len != 4) {
4375 /*
4376 * If the (non-AP) STA became 20 MHz only, then convert from
4377 * <=80 to 20-MHz-only format, where MCSes are indicated in
4378 * the groups 0-7, 8-9, 10-11, 12-13 rather than just 0-9,
4379 * 10-11, 12-13. Thus, use 0-9 for 0-7 and 8-9.
4380 */
4381 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
4382 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
4383 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs11_max_nss);
4384 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs13_max_nss);
4385 } else {
4386 skb_put_data(skb, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4387 }
4388
4389 if (ppet_len)
4390 skb_put_data(skb, &eht_cap->eht_ppe_thres, ppet_len);
4391
4392 return 0;
4393}
4394
4395const char *ieee80211_conn_mode_str(enum ieee80211_conn_mode mode)
4396{
4397 static const char * const modes[] = {
4398 [IEEE80211_CONN_MODE_S1G] = "S1G",
4399 [IEEE80211_CONN_MODE_LEGACY] = "legacy",
4400 [IEEE80211_CONN_MODE_HT] = "HT",
4401 [IEEE80211_CONN_MODE_VHT] = "VHT",
4402 [IEEE80211_CONN_MODE_HE] = "HE",
4403 [IEEE80211_CONN_MODE_EHT] = "EHT",
4404 };
4405
4406 if (WARN_ON(mode >= ARRAY_SIZE(modes)))
4407 return "<out of range>";
4408
4409 return modes[mode] ?: "<missing string>";
4410}
4411
4412enum ieee80211_conn_bw_limit
4413ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def *chandef)
4414{
4415 switch (chandef->width) {
4416 case NL80211_CHAN_WIDTH_20_NOHT:
4417 case NL80211_CHAN_WIDTH_20:
4418 return IEEE80211_CONN_BW_LIMIT_20;
4419 case NL80211_CHAN_WIDTH_40:
4420 return IEEE80211_CONN_BW_LIMIT_40;
4421 case NL80211_CHAN_WIDTH_80:
4422 return IEEE80211_CONN_BW_LIMIT_80;
4423 case NL80211_CHAN_WIDTH_80P80:
4424 case NL80211_CHAN_WIDTH_160:
4425 return IEEE80211_CONN_BW_LIMIT_160;
4426 case NL80211_CHAN_WIDTH_320:
4427 return IEEE80211_CONN_BW_LIMIT_320;
4428 default:
4429 WARN(1, "unhandled chandef width %d\n", chandef->width);
4430 return IEEE80211_CONN_BW_LIMIT_20;
4431 }
4432}
4433
4434void ieee80211_clear_tpe(struct ieee80211_parsed_tpe *tpe)
4435{
4436 for (int i = 0; i < 2; i++) {
4437 tpe->max_local[i].valid = false;
4438 memset(tpe->max_local[i].power,
4439 IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT,
4440 sizeof(tpe->max_local[i].power));
4441
4442 tpe->max_reg_client[i].valid = false;
4443 memset(tpe->max_reg_client[i].power,
4444 IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT,
4445 sizeof(tpe->max_reg_client[i].power));
4446
4447 tpe->psd_local[i].valid = false;
4448 memset(tpe->psd_local[i].power,
4449 IEEE80211_TPE_PSD_NO_LIMIT,
4450 sizeof(tpe->psd_local[i].power));
4451
4452 tpe->psd_reg_client[i].valid = false;
4453 memset(tpe->psd_reg_client[i].power,
4454 IEEE80211_TPE_PSD_NO_LIMIT,
4455 sizeof(tpe->psd_reg_client[i].power));
4456 }
4457}
1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
16#include <linux/export.h>
17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
22#include <linux/bitmap.h>
23#include <linux/crc32.h>
24#include <net/net_namespace.h>
25#include <net/cfg80211.h>
26#include <net/rtnetlink.h>
27
28#include "ieee80211_i.h"
29#include "driver-ops.h"
30#include "rate.h"
31#include "mesh.h"
32#include "wme.h"
33#include "led.h"
34#include "wep.h"
35
36/* privid for wiphys to determine whether they belong to us or not */
37const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50 enum nl80211_iftype type)
51{
52 __le16 fc = hdr->frame_control;
53
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
56 return NULL;
57
58 if (ieee80211_is_data(fc)) {
59 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
61
62 if (ieee80211_has_a4(fc))
63 return NULL;
64 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
67 return hdr->addr2;
68
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
73 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
75 return hdr->addr3;
76 }
77
78 if (ieee80211_is_ctl(fc)) {
79 if (ieee80211_is_pspoll(fc))
80 return hdr->addr1;
81
82 if (ieee80211_is_back_req(fc)) {
83 switch (type) {
84 case NL80211_IFTYPE_STATION:
85 return hdr->addr2;
86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
88 return hdr->addr1;
89 default:
90 break; /* fall through to the return */
91 }
92 }
93 }
94
95 return NULL;
96}
97
98void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
99{
100 struct sk_buff *skb;
101 struct ieee80211_hdr *hdr;
102
103 skb_queue_walk(&tx->skbs, skb) {
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
106 }
107}
108
109int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
110 int rate, int erp, int short_preamble,
111 int shift)
112{
113 int dur;
114
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
118 * also include SIFS.
119 *
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
122 *
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
125 */
126
127 if (band == IEEE80211_BAND_5GHZ || erp) {
128 /*
129 * OFDM:
130 *
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
135 *
136 * T_SYM = 4 usec
137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
140 */
141 dur = 16; /* SIFS + signal ext */
142 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
144
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
148 */
149 dur *= 1 << shift;
150
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
153 */
154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
155 4 * rate); /* T_SYM x N_SYM */
156 } else {
157 /*
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
161 *
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
166 */
167 dur = 10; /* aSIFSTime = 10 usec */
168 dur += short_preamble ? (72 + 24) : (144 + 48);
169
170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
171 }
172
173 return dur;
174}
175
176/* Exported duration function for driver use */
177__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
178 struct ieee80211_vif *vif,
179 enum ieee80211_band band,
180 size_t frame_len,
181 struct ieee80211_rate *rate)
182{
183 struct ieee80211_sub_if_data *sdata;
184 u16 dur;
185 int erp, shift = 0;
186 bool short_preamble = false;
187
188 erp = 0;
189 if (vif) {
190 sdata = vif_to_sdata(vif);
191 short_preamble = sdata->vif.bss_conf.use_short_preamble;
192 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
193 erp = rate->flags & IEEE80211_RATE_ERP_G;
194 shift = ieee80211_vif_get_shift(vif);
195 }
196
197 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
198 short_preamble, shift);
199
200 return cpu_to_le16(dur);
201}
202EXPORT_SYMBOL(ieee80211_generic_frame_duration);
203
204__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif, size_t frame_len,
206 const struct ieee80211_tx_info *frame_txctl)
207{
208 struct ieee80211_local *local = hw_to_local(hw);
209 struct ieee80211_rate *rate;
210 struct ieee80211_sub_if_data *sdata;
211 bool short_preamble;
212 int erp, shift = 0, bitrate;
213 u16 dur;
214 struct ieee80211_supported_band *sband;
215
216 sband = local->hw.wiphy->bands[frame_txctl->band];
217
218 short_preamble = false;
219
220 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
221
222 erp = 0;
223 if (vif) {
224 sdata = vif_to_sdata(vif);
225 short_preamble = sdata->vif.bss_conf.use_short_preamble;
226 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
227 erp = rate->flags & IEEE80211_RATE_ERP_G;
228 shift = ieee80211_vif_get_shift(vif);
229 }
230
231 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
232
233 /* CTS duration */
234 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 /* Data frame duration */
237 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
238 erp, short_preamble, shift);
239 /* ACK duration */
240 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
241 erp, short_preamble, shift);
242
243 return cpu_to_le16(dur);
244}
245EXPORT_SYMBOL(ieee80211_rts_duration);
246
247__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
248 struct ieee80211_vif *vif,
249 size_t frame_len,
250 const struct ieee80211_tx_info *frame_txctl)
251{
252 struct ieee80211_local *local = hw_to_local(hw);
253 struct ieee80211_rate *rate;
254 struct ieee80211_sub_if_data *sdata;
255 bool short_preamble;
256 int erp, shift = 0, bitrate;
257 u16 dur;
258 struct ieee80211_supported_band *sband;
259
260 sband = local->hw.wiphy->bands[frame_txctl->band];
261
262 short_preamble = false;
263
264 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
265 erp = 0;
266 if (vif) {
267 sdata = vif_to_sdata(vif);
268 short_preamble = sdata->vif.bss_conf.use_short_preamble;
269 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
270 erp = rate->flags & IEEE80211_RATE_ERP_G;
271 shift = ieee80211_vif_get_shift(vif);
272 }
273
274 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
275
276 /* Data frame duration */
277 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
278 erp, short_preamble, shift);
279 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
280 /* ACK duration */
281 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
282 erp, short_preamble, shift);
283 }
284
285 return cpu_to_le16(dur);
286}
287EXPORT_SYMBOL(ieee80211_ctstoself_duration);
288
289void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
290{
291 struct ieee80211_sub_if_data *sdata;
292 int n_acs = IEEE80211_NUM_ACS;
293
294 if (local->hw.queues < IEEE80211_NUM_ACS)
295 n_acs = 1;
296
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
298 int ac;
299
300 if (!sdata->dev)
301 continue;
302
303 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
304 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
305 continue;
306
307 for (ac = 0; ac < n_acs; ac++) {
308 int ac_queue = sdata->vif.hw_queue[ac];
309
310 if (ac_queue == queue ||
311 (sdata->vif.cab_queue == queue &&
312 local->queue_stop_reasons[ac_queue] == 0 &&
313 skb_queue_empty(&local->pending[ac_queue])))
314 netif_wake_subqueue(sdata->dev, ac);
315 }
316 }
317}
318
319static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
320 enum queue_stop_reason reason)
321{
322 struct ieee80211_local *local = hw_to_local(hw);
323
324 trace_wake_queue(local, queue, reason);
325
326 if (WARN_ON(queue >= hw->queues))
327 return;
328
329 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
330 return;
331
332 __clear_bit(reason, &local->queue_stop_reasons[queue]);
333
334 if (local->queue_stop_reasons[queue] != 0)
335 /* someone still has this queue stopped */
336 return;
337
338 if (skb_queue_empty(&local->pending[queue])) {
339 rcu_read_lock();
340 ieee80211_propagate_queue_wake(local, queue);
341 rcu_read_unlock();
342 } else
343 tasklet_schedule(&local->tx_pending_tasklet);
344}
345
346void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
348{
349 struct ieee80211_local *local = hw_to_local(hw);
350 unsigned long flags;
351
352 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
353 __ieee80211_wake_queue(hw, queue, reason);
354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
355}
356
357void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
358{
359 ieee80211_wake_queue_by_reason(hw, queue,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER);
361}
362EXPORT_SYMBOL(ieee80211_wake_queue);
363
364static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
365 enum queue_stop_reason reason)
366{
367 struct ieee80211_local *local = hw_to_local(hw);
368 struct ieee80211_sub_if_data *sdata;
369 int n_acs = IEEE80211_NUM_ACS;
370
371 trace_stop_queue(local, queue, reason);
372
373 if (WARN_ON(queue >= hw->queues))
374 return;
375
376 if (test_bit(reason, &local->queue_stop_reasons[queue]))
377 return;
378
379 __set_bit(reason, &local->queue_stop_reasons[queue]);
380
381 if (local->hw.queues < IEEE80211_NUM_ACS)
382 n_acs = 1;
383
384 rcu_read_lock();
385 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
386 int ac;
387
388 if (!sdata->dev)
389 continue;
390
391 for (ac = 0; ac < n_acs; ac++) {
392 if (sdata->vif.hw_queue[ac] == queue ||
393 sdata->vif.cab_queue == queue)
394 netif_stop_subqueue(sdata->dev, ac);
395 }
396 }
397 rcu_read_unlock();
398}
399
400void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
401 enum queue_stop_reason reason)
402{
403 struct ieee80211_local *local = hw_to_local(hw);
404 unsigned long flags;
405
406 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
407 __ieee80211_stop_queue(hw, queue, reason);
408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
409}
410
411void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
412{
413 ieee80211_stop_queue_by_reason(hw, queue,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER);
415}
416EXPORT_SYMBOL(ieee80211_stop_queue);
417
418void ieee80211_add_pending_skb(struct ieee80211_local *local,
419 struct sk_buff *skb)
420{
421 struct ieee80211_hw *hw = &local->hw;
422 unsigned long flags;
423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
424 int queue = info->hw_queue;
425
426 if (WARN_ON(!info->control.vif)) {
427 ieee80211_free_txskb(&local->hw, skb);
428 return;
429 }
430
431 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
432 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
433 __skb_queue_tail(&local->pending[queue], skb);
434 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
436}
437
438void ieee80211_add_pending_skbs(struct ieee80211_local *local,
439 struct sk_buff_head *skbs)
440{
441 struct ieee80211_hw *hw = &local->hw;
442 struct sk_buff *skb;
443 unsigned long flags;
444 int queue, i;
445
446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
447 while ((skb = skb_dequeue(skbs))) {
448 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
449
450 if (WARN_ON(!info->control.vif)) {
451 ieee80211_free_txskb(&local->hw, skb);
452 continue;
453 }
454
455 queue = info->hw_queue;
456
457 __ieee80211_stop_queue(hw, queue,
458 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
459
460 __skb_queue_tail(&local->pending[queue], skb);
461 }
462
463 for (i = 0; i < hw->queues; i++)
464 __ieee80211_wake_queue(hw, i,
465 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
466 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
467}
468
469void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
470 unsigned long queues,
471 enum queue_stop_reason reason)
472{
473 struct ieee80211_local *local = hw_to_local(hw);
474 unsigned long flags;
475 int i;
476
477 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
478
479 for_each_set_bit(i, &queues, hw->queues)
480 __ieee80211_stop_queue(hw, i, reason);
481
482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
483}
484
485void ieee80211_stop_queues(struct ieee80211_hw *hw)
486{
487 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
488 IEEE80211_QUEUE_STOP_REASON_DRIVER);
489}
490EXPORT_SYMBOL(ieee80211_stop_queues);
491
492int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
493{
494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
496 int ret;
497
498 if (WARN_ON(queue >= hw->queues))
499 return true;
500
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
503 &local->queue_stop_reasons[queue]);
504 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
505 return ret;
506}
507EXPORT_SYMBOL(ieee80211_queue_stopped);
508
509void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
510 unsigned long queues,
511 enum queue_stop_reason reason)
512{
513 struct ieee80211_local *local = hw_to_local(hw);
514 unsigned long flags;
515 int i;
516
517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
518
519 for_each_set_bit(i, &queues, hw->queues)
520 __ieee80211_wake_queue(hw, i, reason);
521
522 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
523}
524
525void ieee80211_wake_queues(struct ieee80211_hw *hw)
526{
527 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
528 IEEE80211_QUEUE_STOP_REASON_DRIVER);
529}
530EXPORT_SYMBOL(ieee80211_wake_queues);
531
532void ieee80211_flush_queues(struct ieee80211_local *local,
533 struct ieee80211_sub_if_data *sdata)
534{
535 u32 queues;
536
537 if (!local->ops->flush)
538 return;
539
540 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
541 int ac;
542
543 queues = 0;
544
545 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
546 queues |= BIT(sdata->vif.hw_queue[ac]);
547 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
548 queues |= BIT(sdata->vif.cab_queue);
549 } else {
550 /* all queues */
551 queues = BIT(local->hw.queues) - 1;
552 }
553
554 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH);
556
557 drv_flush(local, queues, false);
558
559 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH);
561}
562
563static void __iterate_active_interfaces(struct ieee80211_local *local,
564 u32 iter_flags,
565 void (*iterator)(void *data, u8 *mac,
566 struct ieee80211_vif *vif),
567 void *data)
568{
569 struct ieee80211_sub_if_data *sdata;
570
571 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
572 switch (sdata->vif.type) {
573 case NL80211_IFTYPE_MONITOR:
574 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
575 continue;
576 break;
577 case NL80211_IFTYPE_AP_VLAN:
578 continue;
579 default:
580 break;
581 }
582 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
583 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
584 continue;
585 if (ieee80211_sdata_running(sdata))
586 iterator(data, sdata->vif.addr,
587 &sdata->vif);
588 }
589
590 sdata = rcu_dereference_check(local->monitor_sdata,
591 lockdep_is_held(&local->iflist_mtx) ||
592 lockdep_rtnl_is_held());
593 if (sdata &&
594 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
595 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
596 iterator(data, sdata->vif.addr, &sdata->vif);
597}
598
599void ieee80211_iterate_active_interfaces(
600 struct ieee80211_hw *hw, u32 iter_flags,
601 void (*iterator)(void *data, u8 *mac,
602 struct ieee80211_vif *vif),
603 void *data)
604{
605 struct ieee80211_local *local = hw_to_local(hw);
606
607 mutex_lock(&local->iflist_mtx);
608 __iterate_active_interfaces(local, iter_flags, iterator, data);
609 mutex_unlock(&local->iflist_mtx);
610}
611EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
612
613void ieee80211_iterate_active_interfaces_atomic(
614 struct ieee80211_hw *hw, u32 iter_flags,
615 void (*iterator)(void *data, u8 *mac,
616 struct ieee80211_vif *vif),
617 void *data)
618{
619 struct ieee80211_local *local = hw_to_local(hw);
620
621 rcu_read_lock();
622 __iterate_active_interfaces(local, iter_flags, iterator, data);
623 rcu_read_unlock();
624}
625EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
626
627void ieee80211_iterate_active_interfaces_rtnl(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
631 void *data)
632{
633 struct ieee80211_local *local = hw_to_local(hw);
634
635 ASSERT_RTNL();
636
637 __iterate_active_interfaces(local, iter_flags, iterator, data);
638}
639EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
640
641struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
642{
643 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
644
645 if (!ieee80211_sdata_running(sdata) ||
646 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
647 return NULL;
648 return &sdata->vif;
649}
650EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
651
652/*
653 * Nothing should have been stuffed into the workqueue during
654 * the suspend->resume cycle. If this WARN is seen then there
655 * is a bug with either the driver suspend or something in
656 * mac80211 stuffing into the workqueue which we haven't yet
657 * cleared during mac80211's suspend cycle.
658 */
659static bool ieee80211_can_queue_work(struct ieee80211_local *local)
660{
661 if (WARN(local->suspended && !local->resuming,
662 "queueing ieee80211 work while going to suspend\n"))
663 return false;
664
665 return true;
666}
667
668void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 if (!ieee80211_can_queue_work(local))
673 return;
674
675 queue_work(local->workqueue, work);
676}
677EXPORT_SYMBOL(ieee80211_queue_work);
678
679void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
680 struct delayed_work *dwork,
681 unsigned long delay)
682{
683 struct ieee80211_local *local = hw_to_local(hw);
684
685 if (!ieee80211_can_queue_work(local))
686 return;
687
688 queue_delayed_work(local->workqueue, dwork, delay);
689}
690EXPORT_SYMBOL(ieee80211_queue_delayed_work);
691
692u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
693 struct ieee802_11_elems *elems,
694 u64 filter, u32 crc)
695{
696 size_t left = len;
697 const u8 *pos = start;
698 bool calc_crc = filter != 0;
699 DECLARE_BITMAP(seen_elems, 256);
700 const u8 *ie;
701
702 bitmap_zero(seen_elems, 256);
703 memset(elems, 0, sizeof(*elems));
704 elems->ie_start = start;
705 elems->total_len = len;
706
707 while (left >= 2) {
708 u8 id, elen;
709 bool elem_parse_failed;
710
711 id = *pos++;
712 elen = *pos++;
713 left -= 2;
714
715 if (elen > left) {
716 elems->parse_error = true;
717 break;
718 }
719
720 switch (id) {
721 case WLAN_EID_SSID:
722 case WLAN_EID_SUPP_RATES:
723 case WLAN_EID_FH_PARAMS:
724 case WLAN_EID_DS_PARAMS:
725 case WLAN_EID_CF_PARAMS:
726 case WLAN_EID_TIM:
727 case WLAN_EID_IBSS_PARAMS:
728 case WLAN_EID_CHALLENGE:
729 case WLAN_EID_RSN:
730 case WLAN_EID_ERP_INFO:
731 case WLAN_EID_EXT_SUPP_RATES:
732 case WLAN_EID_HT_CAPABILITY:
733 case WLAN_EID_HT_OPERATION:
734 case WLAN_EID_VHT_CAPABILITY:
735 case WLAN_EID_VHT_OPERATION:
736 case WLAN_EID_MESH_ID:
737 case WLAN_EID_MESH_CONFIG:
738 case WLAN_EID_PEER_MGMT:
739 case WLAN_EID_PREQ:
740 case WLAN_EID_PREP:
741 case WLAN_EID_PERR:
742 case WLAN_EID_RANN:
743 case WLAN_EID_CHANNEL_SWITCH:
744 case WLAN_EID_EXT_CHANSWITCH_ANN:
745 case WLAN_EID_COUNTRY:
746 case WLAN_EID_PWR_CONSTRAINT:
747 case WLAN_EID_TIMEOUT_INTERVAL:
748 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
749 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
750 case WLAN_EID_CHAN_SWITCH_PARAM:
751 /*
752 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
753 * that if the content gets bigger it might be needed more than once
754 */
755 if (test_bit(id, seen_elems)) {
756 elems->parse_error = true;
757 left -= elen;
758 pos += elen;
759 continue;
760 }
761 break;
762 }
763
764 if (calc_crc && id < 64 && (filter & (1ULL << id)))
765 crc = crc32_be(crc, pos - 2, elen + 2);
766
767 elem_parse_failed = false;
768
769 switch (id) {
770 case WLAN_EID_SSID:
771 elems->ssid = pos;
772 elems->ssid_len = elen;
773 break;
774 case WLAN_EID_SUPP_RATES:
775 elems->supp_rates = pos;
776 elems->supp_rates_len = elen;
777 break;
778 case WLAN_EID_DS_PARAMS:
779 if (elen >= 1)
780 elems->ds_params = pos;
781 else
782 elem_parse_failed = true;
783 break;
784 case WLAN_EID_TIM:
785 if (elen >= sizeof(struct ieee80211_tim_ie)) {
786 elems->tim = (void *)pos;
787 elems->tim_len = elen;
788 } else
789 elem_parse_failed = true;
790 break;
791 case WLAN_EID_CHALLENGE:
792 elems->challenge = pos;
793 elems->challenge_len = elen;
794 break;
795 case WLAN_EID_VENDOR_SPECIFIC:
796 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
797 pos[2] == 0xf2) {
798 /* Microsoft OUI (00:50:F2) */
799
800 if (calc_crc)
801 crc = crc32_be(crc, pos - 2, elen + 2);
802
803 if (elen >= 5 && pos[3] == 2) {
804 /* OUI Type 2 - WMM IE */
805 if (pos[4] == 0) {
806 elems->wmm_info = pos;
807 elems->wmm_info_len = elen;
808 } else if (pos[4] == 1) {
809 elems->wmm_param = pos;
810 elems->wmm_param_len = elen;
811 }
812 }
813 }
814 break;
815 case WLAN_EID_RSN:
816 elems->rsn = pos;
817 elems->rsn_len = elen;
818 break;
819 case WLAN_EID_ERP_INFO:
820 if (elen >= 1)
821 elems->erp_info = pos;
822 else
823 elem_parse_failed = true;
824 break;
825 case WLAN_EID_EXT_SUPP_RATES:
826 elems->ext_supp_rates = pos;
827 elems->ext_supp_rates_len = elen;
828 break;
829 case WLAN_EID_HT_CAPABILITY:
830 if (elen >= sizeof(struct ieee80211_ht_cap))
831 elems->ht_cap_elem = (void *)pos;
832 else
833 elem_parse_failed = true;
834 break;
835 case WLAN_EID_HT_OPERATION:
836 if (elen >= sizeof(struct ieee80211_ht_operation))
837 elems->ht_operation = (void *)pos;
838 else
839 elem_parse_failed = true;
840 break;
841 case WLAN_EID_VHT_CAPABILITY:
842 if (elen >= sizeof(struct ieee80211_vht_cap))
843 elems->vht_cap_elem = (void *)pos;
844 else
845 elem_parse_failed = true;
846 break;
847 case WLAN_EID_VHT_OPERATION:
848 if (elen >= sizeof(struct ieee80211_vht_operation))
849 elems->vht_operation = (void *)pos;
850 else
851 elem_parse_failed = true;
852 break;
853 case WLAN_EID_OPMODE_NOTIF:
854 if (elen > 0)
855 elems->opmode_notif = pos;
856 else
857 elem_parse_failed = true;
858 break;
859 case WLAN_EID_MESH_ID:
860 elems->mesh_id = pos;
861 elems->mesh_id_len = elen;
862 break;
863 case WLAN_EID_MESH_CONFIG:
864 if (elen >= sizeof(struct ieee80211_meshconf_ie))
865 elems->mesh_config = (void *)pos;
866 else
867 elem_parse_failed = true;
868 break;
869 case WLAN_EID_PEER_MGMT:
870 elems->peering = pos;
871 elems->peering_len = elen;
872 break;
873 case WLAN_EID_MESH_AWAKE_WINDOW:
874 if (elen >= 2)
875 elems->awake_window = (void *)pos;
876 break;
877 case WLAN_EID_PREQ:
878 elems->preq = pos;
879 elems->preq_len = elen;
880 break;
881 case WLAN_EID_PREP:
882 elems->prep = pos;
883 elems->prep_len = elen;
884 break;
885 case WLAN_EID_PERR:
886 elems->perr = pos;
887 elems->perr_len = elen;
888 break;
889 case WLAN_EID_RANN:
890 if (elen >= sizeof(struct ieee80211_rann_ie))
891 elems->rann = (void *)pos;
892 else
893 elem_parse_failed = true;
894 break;
895 case WLAN_EID_CHANNEL_SWITCH:
896 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
897 elem_parse_failed = true;
898 break;
899 }
900 elems->ch_switch_ie = (void *)pos;
901 break;
902 case WLAN_EID_EXT_CHANSWITCH_ANN:
903 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
904 elem_parse_failed = true;
905 break;
906 }
907 elems->ext_chansw_ie = (void *)pos;
908 break;
909 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
910 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
911 elem_parse_failed = true;
912 break;
913 }
914 elems->sec_chan_offs = (void *)pos;
915 break;
916 case WLAN_EID_CHAN_SWITCH_PARAM:
917 if (elen !=
918 sizeof(*elems->mesh_chansw_params_ie)) {
919 elem_parse_failed = true;
920 break;
921 }
922 elems->mesh_chansw_params_ie = (void *)pos;
923 break;
924 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
925 if (!action ||
926 elen != sizeof(*elems->wide_bw_chansw_ie)) {
927 elem_parse_failed = true;
928 break;
929 }
930 elems->wide_bw_chansw_ie = (void *)pos;
931 break;
932 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
933 if (action) {
934 elem_parse_failed = true;
935 break;
936 }
937 /*
938 * This is a bit tricky, but as we only care about
939 * the wide bandwidth channel switch element, so
940 * just parse it out manually.
941 */
942 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
943 pos, elen);
944 if (ie) {
945 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
946 elems->wide_bw_chansw_ie =
947 (void *)(ie + 2);
948 else
949 elem_parse_failed = true;
950 }
951 break;
952 case WLAN_EID_COUNTRY:
953 elems->country_elem = pos;
954 elems->country_elem_len = elen;
955 break;
956 case WLAN_EID_PWR_CONSTRAINT:
957 if (elen != 1) {
958 elem_parse_failed = true;
959 break;
960 }
961 elems->pwr_constr_elem = pos;
962 break;
963 case WLAN_EID_TIMEOUT_INTERVAL:
964 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
965 elems->timeout_int = (void *)pos;
966 else
967 elem_parse_failed = true;
968 break;
969 default:
970 break;
971 }
972
973 if (elem_parse_failed)
974 elems->parse_error = true;
975 else
976 __set_bit(id, seen_elems);
977
978 left -= elen;
979 pos += elen;
980 }
981
982 if (left != 0)
983 elems->parse_error = true;
984
985 return crc;
986}
987
988void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
989 bool bss_notify)
990{
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_tx_queue_params qparam;
993 struct ieee80211_chanctx_conf *chanctx_conf;
994 int ac;
995 bool use_11b, enable_qos;
996 int aCWmin, aCWmax;
997
998 if (!local->ops->conf_tx)
999 return;
1000
1001 if (local->hw.queues < IEEE80211_NUM_ACS)
1002 return;
1003
1004 memset(&qparam, 0, sizeof(qparam));
1005
1006 rcu_read_lock();
1007 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1008 use_11b = (chanctx_conf &&
1009 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1010 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1011 rcu_read_unlock();
1012
1013 /*
1014 * By default disable QoS in STA mode for old access points, which do
1015 * not support 802.11e. New APs will provide proper queue parameters,
1016 * that we will configure later.
1017 */
1018 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1019
1020 /* Set defaults according to 802.11-2007 Table 7-37 */
1021 aCWmax = 1023;
1022 if (use_11b)
1023 aCWmin = 31;
1024 else
1025 aCWmin = 15;
1026
1027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
1030 qparam.txop = 0;
1031 qparam.aifs = 2;
1032
1033 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1034 /* Update if QoS is enabled. */
1035 if (enable_qos) {
1036 switch (ac) {
1037 case IEEE80211_AC_BK:
1038 qparam.cw_max = aCWmax;
1039 qparam.cw_min = aCWmin;
1040 qparam.txop = 0;
1041 qparam.aifs = 7;
1042 break;
1043 /* never happens but let's not leave undefined */
1044 default:
1045 case IEEE80211_AC_BE:
1046 qparam.cw_max = aCWmax;
1047 qparam.cw_min = aCWmin;
1048 qparam.txop = 0;
1049 qparam.aifs = 3;
1050 break;
1051 case IEEE80211_AC_VI:
1052 qparam.cw_max = aCWmin;
1053 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1054 if (use_11b)
1055 qparam.txop = 6016/32;
1056 else
1057 qparam.txop = 3008/32;
1058 qparam.aifs = 2;
1059 break;
1060 case IEEE80211_AC_VO:
1061 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1062 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1063 if (use_11b)
1064 qparam.txop = 3264/32;
1065 else
1066 qparam.txop = 1504/32;
1067 qparam.aifs = 2;
1068 break;
1069 }
1070 }
1071
1072 qparam.uapsd = false;
1073
1074 sdata->tx_conf[ac] = qparam;
1075 drv_conf_tx(local, sdata, ac, &qparam);
1076 }
1077
1078 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1079 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1080 sdata->vif.bss_conf.qos = enable_qos;
1081 if (bss_notify)
1082 ieee80211_bss_info_change_notify(sdata,
1083 BSS_CHANGED_QOS);
1084 }
1085}
1086
1087void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1088 u16 transaction, u16 auth_alg, u16 status,
1089 const u8 *extra, size_t extra_len, const u8 *da,
1090 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1091 u32 tx_flags)
1092{
1093 struct ieee80211_local *local = sdata->local;
1094 struct sk_buff *skb;
1095 struct ieee80211_mgmt *mgmt;
1096 int err;
1097
1098 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1099 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
1100 if (!skb)
1101 return;
1102
1103 skb_reserve(skb, local->hw.extra_tx_headroom);
1104
1105 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1106 memset(mgmt, 0, 24 + 6);
1107 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1108 IEEE80211_STYPE_AUTH);
1109 memcpy(mgmt->da, da, ETH_ALEN);
1110 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1111 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1112 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1113 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1114 mgmt->u.auth.status_code = cpu_to_le16(status);
1115 if (extra)
1116 memcpy(skb_put(skb, extra_len), extra, extra_len);
1117
1118 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1119 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1120 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1121 WARN_ON(err);
1122 }
1123
1124 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1125 tx_flags;
1126 ieee80211_tx_skb(sdata, skb);
1127}
1128
1129void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1130 const u8 *bssid, u16 stype, u16 reason,
1131 bool send_frame, u8 *frame_buf)
1132{
1133 struct ieee80211_local *local = sdata->local;
1134 struct sk_buff *skb;
1135 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1136
1137 /* build frame */
1138 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1139 mgmt->duration = 0; /* initialize only */
1140 mgmt->seq_ctrl = 0; /* initialize only */
1141 memcpy(mgmt->da, bssid, ETH_ALEN);
1142 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1143 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1144 /* u.deauth.reason_code == u.disassoc.reason_code */
1145 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1146
1147 if (send_frame) {
1148 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1149 IEEE80211_DEAUTH_FRAME_LEN);
1150 if (!skb)
1151 return;
1152
1153 skb_reserve(skb, local->hw.extra_tx_headroom);
1154
1155 /* copy in frame */
1156 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1157 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1158
1159 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1160 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1161 IEEE80211_SKB_CB(skb)->flags |=
1162 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1163
1164 ieee80211_tx_skb(sdata, skb);
1165 }
1166}
1167
1168int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1169 size_t buffer_len, const u8 *ie, size_t ie_len,
1170 enum ieee80211_band band, u32 rate_mask,
1171 struct cfg80211_chan_def *chandef)
1172{
1173 struct ieee80211_supported_band *sband;
1174 u8 *pos = buffer, *end = buffer + buffer_len;
1175 size_t offset = 0, noffset;
1176 int supp_rates_len, i;
1177 u8 rates[32];
1178 int num_rates;
1179 int ext_rates_len;
1180 int shift;
1181 u32 rate_flags;
1182
1183 sband = local->hw.wiphy->bands[band];
1184 if (WARN_ON_ONCE(!sband))
1185 return 0;
1186
1187 rate_flags = ieee80211_chandef_rate_flags(chandef);
1188 shift = ieee80211_chandef_get_shift(chandef);
1189
1190 num_rates = 0;
1191 for (i = 0; i < sband->n_bitrates; i++) {
1192 if ((BIT(i) & rate_mask) == 0)
1193 continue; /* skip rate */
1194 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1195 continue;
1196
1197 rates[num_rates++] =
1198 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1199 (1 << shift) * 5);
1200 }
1201
1202 supp_rates_len = min_t(int, num_rates, 8);
1203
1204 if (end - pos < 2 + supp_rates_len)
1205 goto out_err;
1206 *pos++ = WLAN_EID_SUPP_RATES;
1207 *pos++ = supp_rates_len;
1208 memcpy(pos, rates, supp_rates_len);
1209 pos += supp_rates_len;
1210
1211 /* insert "request information" if in custom IEs */
1212 if (ie && ie_len) {
1213 static const u8 before_extrates[] = {
1214 WLAN_EID_SSID,
1215 WLAN_EID_SUPP_RATES,
1216 WLAN_EID_REQUEST,
1217 };
1218 noffset = ieee80211_ie_split(ie, ie_len,
1219 before_extrates,
1220 ARRAY_SIZE(before_extrates),
1221 offset);
1222 if (end - pos < noffset - offset)
1223 goto out_err;
1224 memcpy(pos, ie + offset, noffset - offset);
1225 pos += noffset - offset;
1226 offset = noffset;
1227 }
1228
1229 ext_rates_len = num_rates - supp_rates_len;
1230 if (ext_rates_len > 0) {
1231 if (end - pos < 2 + ext_rates_len)
1232 goto out_err;
1233 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1234 *pos++ = ext_rates_len;
1235 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1236 pos += ext_rates_len;
1237 }
1238
1239 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1240 if (end - pos < 3)
1241 goto out_err;
1242 *pos++ = WLAN_EID_DS_PARAMS;
1243 *pos++ = 1;
1244 *pos++ = ieee80211_frequency_to_channel(
1245 chandef->chan->center_freq);
1246 }
1247
1248 /* insert custom IEs that go before HT */
1249 if (ie && ie_len) {
1250 static const u8 before_ht[] = {
1251 WLAN_EID_SSID,
1252 WLAN_EID_SUPP_RATES,
1253 WLAN_EID_REQUEST,
1254 WLAN_EID_EXT_SUPP_RATES,
1255 WLAN_EID_DS_PARAMS,
1256 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1257 };
1258 noffset = ieee80211_ie_split(ie, ie_len,
1259 before_ht, ARRAY_SIZE(before_ht),
1260 offset);
1261 if (end - pos < noffset - offset)
1262 goto out_err;
1263 memcpy(pos, ie + offset, noffset - offset);
1264 pos += noffset - offset;
1265 offset = noffset;
1266 }
1267
1268 if (sband->ht_cap.ht_supported) {
1269 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1270 goto out_err;
1271 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1272 sband->ht_cap.cap);
1273 }
1274
1275 /*
1276 * If adding more here, adjust code in main.c
1277 * that calculates local->scan_ies_len.
1278 */
1279
1280 /* insert custom IEs that go before VHT */
1281 if (ie && ie_len) {
1282 static const u8 before_vht[] = {
1283 WLAN_EID_SSID,
1284 WLAN_EID_SUPP_RATES,
1285 WLAN_EID_REQUEST,
1286 WLAN_EID_EXT_SUPP_RATES,
1287 WLAN_EID_DS_PARAMS,
1288 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1289 WLAN_EID_HT_CAPABILITY,
1290 WLAN_EID_BSS_COEX_2040,
1291 WLAN_EID_EXT_CAPABILITY,
1292 WLAN_EID_SSID_LIST,
1293 WLAN_EID_CHANNEL_USAGE,
1294 WLAN_EID_INTERWORKING,
1295 /* mesh ID can't happen here */
1296 /* 60 GHz can't happen here right now */
1297 };
1298 noffset = ieee80211_ie_split(ie, ie_len,
1299 before_vht, ARRAY_SIZE(before_vht),
1300 offset);
1301 if (end - pos < noffset - offset)
1302 goto out_err;
1303 memcpy(pos, ie + offset, noffset - offset);
1304 pos += noffset - offset;
1305 offset = noffset;
1306 }
1307
1308 if (sband->vht_cap.vht_supported) {
1309 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1310 goto out_err;
1311 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1312 sband->vht_cap.cap);
1313 }
1314
1315 /* add any remaining custom IEs */
1316 if (ie && ie_len) {
1317 noffset = ie_len;
1318 if (end - pos < noffset - offset)
1319 goto out_err;
1320 memcpy(pos, ie + offset, noffset - offset);
1321 pos += noffset - offset;
1322 }
1323
1324 return pos - buffer;
1325 out_err:
1326 WARN_ONCE(1, "not enough space for preq IEs\n");
1327 return pos - buffer;
1328}
1329
1330struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1331 u8 *dst, u32 ratemask,
1332 struct ieee80211_channel *chan,
1333 const u8 *ssid, size_t ssid_len,
1334 const u8 *ie, size_t ie_len,
1335 bool directed)
1336{
1337 struct ieee80211_local *local = sdata->local;
1338 struct cfg80211_chan_def chandef;
1339 struct sk_buff *skb;
1340 struct ieee80211_mgmt *mgmt;
1341 int ies_len;
1342
1343 /*
1344 * Do not send DS Channel parameter for directed probe requests
1345 * in order to maximize the chance that we get a response. Some
1346 * badly-behaved APs don't respond when this parameter is included.
1347 */
1348 chandef.width = sdata->vif.bss_conf.chandef.width;
1349 if (directed)
1350 chandef.chan = NULL;
1351 else
1352 chandef.chan = chan;
1353
1354 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1355 ssid, ssid_len, 100 + ie_len);
1356 if (!skb)
1357 return NULL;
1358
1359 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1360 skb_tailroom(skb),
1361 ie, ie_len, chan->band,
1362 ratemask, &chandef);
1363 skb_put(skb, ies_len);
1364
1365 if (dst) {
1366 mgmt = (struct ieee80211_mgmt *) skb->data;
1367 memcpy(mgmt->da, dst, ETH_ALEN);
1368 memcpy(mgmt->bssid, dst, ETH_ALEN);
1369 }
1370
1371 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1372
1373 return skb;
1374}
1375
1376void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1377 const u8 *ssid, size_t ssid_len,
1378 const u8 *ie, size_t ie_len,
1379 u32 ratemask, bool directed, u32 tx_flags,
1380 struct ieee80211_channel *channel, bool scan)
1381{
1382 struct sk_buff *skb;
1383
1384 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1385 ssid, ssid_len,
1386 ie, ie_len, directed);
1387 if (skb) {
1388 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1389 if (scan)
1390 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1391 else
1392 ieee80211_tx_skb(sdata, skb);
1393 }
1394}
1395
1396u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1397 struct ieee802_11_elems *elems,
1398 enum ieee80211_band band, u32 *basic_rates)
1399{
1400 struct ieee80211_supported_band *sband;
1401 size_t num_rates;
1402 u32 supp_rates, rate_flags;
1403 int i, j, shift;
1404 sband = sdata->local->hw.wiphy->bands[band];
1405
1406 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1407 shift = ieee80211_vif_get_shift(&sdata->vif);
1408
1409 if (WARN_ON(!sband))
1410 return 1;
1411
1412 num_rates = sband->n_bitrates;
1413 supp_rates = 0;
1414 for (i = 0; i < elems->supp_rates_len +
1415 elems->ext_supp_rates_len; i++) {
1416 u8 rate = 0;
1417 int own_rate;
1418 bool is_basic;
1419 if (i < elems->supp_rates_len)
1420 rate = elems->supp_rates[i];
1421 else if (elems->ext_supp_rates)
1422 rate = elems->ext_supp_rates
1423 [i - elems->supp_rates_len];
1424 own_rate = 5 * (rate & 0x7f);
1425 is_basic = !!(rate & 0x80);
1426
1427 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1428 continue;
1429
1430 for (j = 0; j < num_rates; j++) {
1431 int brate;
1432 if ((rate_flags & sband->bitrates[j].flags)
1433 != rate_flags)
1434 continue;
1435
1436 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1437 1 << shift);
1438
1439 if (brate == own_rate) {
1440 supp_rates |= BIT(j);
1441 if (basic_rates && is_basic)
1442 *basic_rates |= BIT(j);
1443 }
1444 }
1445 }
1446 return supp_rates;
1447}
1448
1449void ieee80211_stop_device(struct ieee80211_local *local)
1450{
1451 ieee80211_led_radio(local, false);
1452 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1453
1454 cancel_work_sync(&local->reconfig_filter);
1455
1456 flush_workqueue(local->workqueue);
1457 drv_stop(local);
1458}
1459
1460static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1461 struct ieee80211_sub_if_data *sdata)
1462{
1463 struct ieee80211_chanctx_conf *conf;
1464 struct ieee80211_chanctx *ctx;
1465
1466 if (!local->use_chanctx)
1467 return;
1468
1469 mutex_lock(&local->chanctx_mtx);
1470 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1471 lockdep_is_held(&local->chanctx_mtx));
1472 if (conf) {
1473 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1474 drv_assign_vif_chanctx(local, sdata, ctx);
1475 }
1476 mutex_unlock(&local->chanctx_mtx);
1477}
1478
1479int ieee80211_reconfig(struct ieee80211_local *local)
1480{
1481 struct ieee80211_hw *hw = &local->hw;
1482 struct ieee80211_sub_if_data *sdata;
1483 struct ieee80211_chanctx *ctx;
1484 struct sta_info *sta;
1485 int res, i;
1486 bool reconfig_due_to_wowlan = false;
1487 struct ieee80211_sub_if_data *sched_scan_sdata;
1488 bool sched_scan_stopped = false;
1489
1490#ifdef CONFIG_PM
1491 if (local->suspended)
1492 local->resuming = true;
1493
1494 if (local->wowlan) {
1495 res = drv_resume(local);
1496 local->wowlan = false;
1497 if (res < 0) {
1498 local->resuming = false;
1499 return res;
1500 }
1501 if (res == 0)
1502 goto wake_up;
1503 WARN_ON(res > 1);
1504 /*
1505 * res is 1, which means the driver requested
1506 * to go through a regular reset on wakeup.
1507 */
1508 reconfig_due_to_wowlan = true;
1509 }
1510#endif
1511 /* everything else happens only if HW was up & running */
1512 if (!local->open_count)
1513 goto wake_up;
1514
1515 /*
1516 * Upon resume hardware can sometimes be goofy due to
1517 * various platform / driver / bus issues, so restarting
1518 * the device may at times not work immediately. Propagate
1519 * the error.
1520 */
1521 res = drv_start(local);
1522 if (res) {
1523 WARN(local->suspended, "Hardware became unavailable "
1524 "upon resume. This could be a software issue "
1525 "prior to suspend or a hardware issue.\n");
1526 return res;
1527 }
1528
1529 /* setup fragmentation threshold */
1530 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1531
1532 /* setup RTS threshold */
1533 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1534
1535 /* reset coverage class */
1536 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1537
1538 ieee80211_led_radio(local, true);
1539 ieee80211_mod_tpt_led_trig(local,
1540 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1541
1542 /* add interfaces */
1543 sdata = rtnl_dereference(local->monitor_sdata);
1544 if (sdata) {
1545 /* in HW restart it exists already */
1546 WARN_ON(local->resuming);
1547 res = drv_add_interface(local, sdata);
1548 if (WARN_ON(res)) {
1549 rcu_assign_pointer(local->monitor_sdata, NULL);
1550 synchronize_net();
1551 kfree(sdata);
1552 }
1553 }
1554
1555 list_for_each_entry(sdata, &local->interfaces, list) {
1556 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1557 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1558 ieee80211_sdata_running(sdata))
1559 res = drv_add_interface(local, sdata);
1560 }
1561
1562 /* add channel contexts */
1563 if (local->use_chanctx) {
1564 mutex_lock(&local->chanctx_mtx);
1565 list_for_each_entry(ctx, &local->chanctx_list, list)
1566 WARN_ON(drv_add_chanctx(local, ctx));
1567 mutex_unlock(&local->chanctx_mtx);
1568 }
1569
1570 list_for_each_entry(sdata, &local->interfaces, list) {
1571 if (!ieee80211_sdata_running(sdata))
1572 continue;
1573 ieee80211_assign_chanctx(local, sdata);
1574 }
1575
1576 sdata = rtnl_dereference(local->monitor_sdata);
1577 if (sdata && ieee80211_sdata_running(sdata))
1578 ieee80211_assign_chanctx(local, sdata);
1579
1580 /* add STAs back */
1581 mutex_lock(&local->sta_mtx);
1582 list_for_each_entry(sta, &local->sta_list, list) {
1583 enum ieee80211_sta_state state;
1584
1585 if (!sta->uploaded)
1586 continue;
1587
1588 /* AP-mode stations will be added later */
1589 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1590 continue;
1591
1592 for (state = IEEE80211_STA_NOTEXIST;
1593 state < sta->sta_state; state++)
1594 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1595 state + 1));
1596 }
1597 mutex_unlock(&local->sta_mtx);
1598
1599 /* reconfigure tx conf */
1600 if (hw->queues >= IEEE80211_NUM_ACS) {
1601 list_for_each_entry(sdata, &local->interfaces, list) {
1602 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1603 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1604 !ieee80211_sdata_running(sdata))
1605 continue;
1606
1607 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1608 drv_conf_tx(local, sdata, i,
1609 &sdata->tx_conf[i]);
1610 }
1611 }
1612
1613 /* reconfigure hardware */
1614 ieee80211_hw_config(local, ~0);
1615
1616 ieee80211_configure_filter(local);
1617
1618 /* Finally also reconfigure all the BSS information */
1619 list_for_each_entry(sdata, &local->interfaces, list) {
1620 u32 changed;
1621
1622 if (!ieee80211_sdata_running(sdata))
1623 continue;
1624
1625 /* common change flags for all interface types */
1626 changed = BSS_CHANGED_ERP_CTS_PROT |
1627 BSS_CHANGED_ERP_PREAMBLE |
1628 BSS_CHANGED_ERP_SLOT |
1629 BSS_CHANGED_HT |
1630 BSS_CHANGED_BASIC_RATES |
1631 BSS_CHANGED_BEACON_INT |
1632 BSS_CHANGED_BSSID |
1633 BSS_CHANGED_CQM |
1634 BSS_CHANGED_QOS |
1635 BSS_CHANGED_IDLE |
1636 BSS_CHANGED_TXPOWER;
1637
1638 switch (sdata->vif.type) {
1639 case NL80211_IFTYPE_STATION:
1640 changed |= BSS_CHANGED_ASSOC |
1641 BSS_CHANGED_ARP_FILTER |
1642 BSS_CHANGED_PS;
1643
1644 /* Re-send beacon info report to the driver */
1645 if (sdata->u.mgd.have_beacon)
1646 changed |= BSS_CHANGED_BEACON_INFO;
1647
1648 sdata_lock(sdata);
1649 ieee80211_bss_info_change_notify(sdata, changed);
1650 sdata_unlock(sdata);
1651 break;
1652 case NL80211_IFTYPE_ADHOC:
1653 changed |= BSS_CHANGED_IBSS;
1654 /* fall through */
1655 case NL80211_IFTYPE_AP:
1656 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1657
1658 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1659 changed |= BSS_CHANGED_AP_PROBE_RESP;
1660
1661 if (rcu_access_pointer(sdata->u.ap.beacon))
1662 drv_start_ap(local, sdata);
1663 }
1664
1665 /* fall through */
1666 case NL80211_IFTYPE_MESH_POINT:
1667 if (sdata->vif.bss_conf.enable_beacon) {
1668 changed |= BSS_CHANGED_BEACON |
1669 BSS_CHANGED_BEACON_ENABLED;
1670 ieee80211_bss_info_change_notify(sdata, changed);
1671 }
1672 break;
1673 case NL80211_IFTYPE_WDS:
1674 break;
1675 case NL80211_IFTYPE_AP_VLAN:
1676 case NL80211_IFTYPE_MONITOR:
1677 /* ignore virtual */
1678 break;
1679 case NL80211_IFTYPE_P2P_DEVICE:
1680 changed = BSS_CHANGED_IDLE;
1681 break;
1682 case NL80211_IFTYPE_UNSPECIFIED:
1683 case NUM_NL80211_IFTYPES:
1684 case NL80211_IFTYPE_P2P_CLIENT:
1685 case NL80211_IFTYPE_P2P_GO:
1686 WARN_ON(1);
1687 break;
1688 }
1689 }
1690
1691 ieee80211_recalc_ps(local, -1);
1692
1693 /*
1694 * The sta might be in psm against the ap (e.g. because
1695 * this was the state before a hw restart), so we
1696 * explicitly send a null packet in order to make sure
1697 * it'll sync against the ap (and get out of psm).
1698 */
1699 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1700 list_for_each_entry(sdata, &local->interfaces, list) {
1701 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1702 continue;
1703 if (!sdata->u.mgd.associated)
1704 continue;
1705
1706 ieee80211_send_nullfunc(local, sdata, 0);
1707 }
1708 }
1709
1710 /* APs are now beaconing, add back stations */
1711 mutex_lock(&local->sta_mtx);
1712 list_for_each_entry(sta, &local->sta_list, list) {
1713 enum ieee80211_sta_state state;
1714
1715 if (!sta->uploaded)
1716 continue;
1717
1718 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1719 continue;
1720
1721 for (state = IEEE80211_STA_NOTEXIST;
1722 state < sta->sta_state; state++)
1723 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1724 state + 1));
1725 }
1726 mutex_unlock(&local->sta_mtx);
1727
1728 /* add back keys */
1729 list_for_each_entry(sdata, &local->interfaces, list)
1730 if (ieee80211_sdata_running(sdata))
1731 ieee80211_enable_keys(sdata);
1732
1733 wake_up:
1734 local->in_reconfig = false;
1735 barrier();
1736
1737 if (local->monitors == local->open_count && local->monitors > 0)
1738 ieee80211_add_virtual_monitor(local);
1739
1740 /*
1741 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1742 * sessions can be established after a resume.
1743 *
1744 * Also tear down aggregation sessions since reconfiguring
1745 * them in a hardware restart scenario is not easily done
1746 * right now, and the hardware will have lost information
1747 * about the sessions, but we and the AP still think they
1748 * are active. This is really a workaround though.
1749 */
1750 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1751 mutex_lock(&local->sta_mtx);
1752
1753 list_for_each_entry(sta, &local->sta_list, list) {
1754 ieee80211_sta_tear_down_BA_sessions(
1755 sta, AGG_STOP_LOCAL_REQUEST);
1756 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1757 }
1758
1759 mutex_unlock(&local->sta_mtx);
1760 }
1761
1762 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1763 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1764
1765 /*
1766 * Reconfigure sched scan if it was interrupted by FW restart or
1767 * suspend.
1768 */
1769 mutex_lock(&local->mtx);
1770 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1771 lockdep_is_held(&local->mtx));
1772 if (sched_scan_sdata && local->sched_scan_req)
1773 /*
1774 * Sched scan stopped, but we don't want to report it. Instead,
1775 * we're trying to reschedule.
1776 */
1777 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1778 local->sched_scan_req))
1779 sched_scan_stopped = true;
1780 mutex_unlock(&local->mtx);
1781
1782 if (sched_scan_stopped)
1783 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1784
1785 /*
1786 * If this is for hw restart things are still running.
1787 * We may want to change that later, however.
1788 */
1789 if (!local->suspended || reconfig_due_to_wowlan)
1790 drv_restart_complete(local);
1791
1792 if (!local->suspended)
1793 return 0;
1794
1795#ifdef CONFIG_PM
1796 /* first set suspended false, then resuming */
1797 local->suspended = false;
1798 mb();
1799 local->resuming = false;
1800
1801 list_for_each_entry(sdata, &local->interfaces, list) {
1802 if (!ieee80211_sdata_running(sdata))
1803 continue;
1804 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1805 ieee80211_sta_restart(sdata);
1806 }
1807
1808 mod_timer(&local->sta_cleanup, jiffies + 1);
1809#else
1810 WARN_ON(1);
1811#endif
1812
1813 return 0;
1814}
1815
1816void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1817{
1818 struct ieee80211_sub_if_data *sdata;
1819 struct ieee80211_local *local;
1820 struct ieee80211_key *key;
1821
1822 if (WARN_ON(!vif))
1823 return;
1824
1825 sdata = vif_to_sdata(vif);
1826 local = sdata->local;
1827
1828 if (WARN_ON(!local->resuming))
1829 return;
1830
1831 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1832 return;
1833
1834 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1835
1836 mutex_lock(&local->key_mtx);
1837 list_for_each_entry(key, &sdata->key_list, list)
1838 key->flags |= KEY_FLAG_TAINTED;
1839 mutex_unlock(&local->key_mtx);
1840}
1841EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1842
1843void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1844{
1845 struct ieee80211_local *local = sdata->local;
1846 struct ieee80211_chanctx_conf *chanctx_conf;
1847 struct ieee80211_chanctx *chanctx;
1848
1849 mutex_lock(&local->chanctx_mtx);
1850
1851 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1852 lockdep_is_held(&local->chanctx_mtx));
1853
1854 if (WARN_ON_ONCE(!chanctx_conf))
1855 goto unlock;
1856
1857 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1858 ieee80211_recalc_smps_chanctx(local, chanctx);
1859 unlock:
1860 mutex_unlock(&local->chanctx_mtx);
1861}
1862
1863void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1864{
1865 struct ieee80211_local *local = sdata->local;
1866 struct ieee80211_chanctx_conf *chanctx_conf;
1867 struct ieee80211_chanctx *chanctx;
1868
1869 mutex_lock(&local->chanctx_mtx);
1870
1871 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1872 lockdep_is_held(&local->chanctx_mtx));
1873
1874 if (WARN_ON_ONCE(!chanctx_conf))
1875 goto unlock;
1876
1877 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1878 ieee80211_recalc_chanctx_min_def(local, chanctx);
1879 unlock:
1880 mutex_unlock(&local->chanctx_mtx);
1881}
1882
1883static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1884{
1885 int i;
1886
1887 for (i = 0; i < n_ids; i++)
1888 if (ids[i] == id)
1889 return true;
1890 return false;
1891}
1892
1893/**
1894 * ieee80211_ie_split - split an IE buffer according to ordering
1895 *
1896 * @ies: the IE buffer
1897 * @ielen: the length of the IE buffer
1898 * @ids: an array with element IDs that are allowed before
1899 * the split
1900 * @n_ids: the size of the element ID array
1901 * @offset: offset where to start splitting in the buffer
1902 *
1903 * This function splits an IE buffer by updating the @offset
1904 * variable to point to the location where the buffer should be
1905 * split.
1906 *
1907 * It assumes that the given IE buffer is well-formed, this
1908 * has to be guaranteed by the caller!
1909 *
1910 * It also assumes that the IEs in the buffer are ordered
1911 * correctly, if not the result of using this function will not
1912 * be ordered correctly either, i.e. it does no reordering.
1913 *
1914 * The function returns the offset where the next part of the
1915 * buffer starts, which may be @ielen if the entire (remainder)
1916 * of the buffer should be used.
1917 */
1918size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1919 const u8 *ids, int n_ids, size_t offset)
1920{
1921 size_t pos = offset;
1922
1923 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1924 pos += 2 + ies[pos + 1];
1925
1926 return pos;
1927}
1928
1929size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1930{
1931 size_t pos = offset;
1932
1933 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1934 pos += 2 + ies[pos + 1];
1935
1936 return pos;
1937}
1938
1939static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1940 int rssi_min_thold,
1941 int rssi_max_thold)
1942{
1943 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1944
1945 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1946 return;
1947
1948 /*
1949 * Scale up threshold values before storing it, as the RSSI averaging
1950 * algorithm uses a scaled up value as well. Change this scaling
1951 * factor if the RSSI averaging algorithm changes.
1952 */
1953 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1954 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1955}
1956
1957void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1958 int rssi_min_thold,
1959 int rssi_max_thold)
1960{
1961 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1962
1963 WARN_ON(rssi_min_thold == rssi_max_thold ||
1964 rssi_min_thold > rssi_max_thold);
1965
1966 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1967 rssi_max_thold);
1968}
1969EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1970
1971void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1972{
1973 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1974
1975 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1976}
1977EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1978
1979u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1980 u16 cap)
1981{
1982 __le16 tmp;
1983
1984 *pos++ = WLAN_EID_HT_CAPABILITY;
1985 *pos++ = sizeof(struct ieee80211_ht_cap);
1986 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1987
1988 /* capability flags */
1989 tmp = cpu_to_le16(cap);
1990 memcpy(pos, &tmp, sizeof(u16));
1991 pos += sizeof(u16);
1992
1993 /* AMPDU parameters */
1994 *pos++ = ht_cap->ampdu_factor |
1995 (ht_cap->ampdu_density <<
1996 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1997
1998 /* MCS set */
1999 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2000 pos += sizeof(ht_cap->mcs);
2001
2002 /* extended capabilities */
2003 pos += sizeof(__le16);
2004
2005 /* BF capabilities */
2006 pos += sizeof(__le32);
2007
2008 /* antenna selection */
2009 pos += sizeof(u8);
2010
2011 return pos;
2012}
2013
2014u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2015 u32 cap)
2016{
2017 __le32 tmp;
2018
2019 *pos++ = WLAN_EID_VHT_CAPABILITY;
2020 *pos++ = sizeof(struct ieee80211_vht_cap);
2021 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2022
2023 /* capability flags */
2024 tmp = cpu_to_le32(cap);
2025 memcpy(pos, &tmp, sizeof(u32));
2026 pos += sizeof(u32);
2027
2028 /* VHT MCS set */
2029 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2030 pos += sizeof(vht_cap->vht_mcs);
2031
2032 return pos;
2033}
2034
2035u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2036 const struct cfg80211_chan_def *chandef,
2037 u16 prot_mode)
2038{
2039 struct ieee80211_ht_operation *ht_oper;
2040 /* Build HT Information */
2041 *pos++ = WLAN_EID_HT_OPERATION;
2042 *pos++ = sizeof(struct ieee80211_ht_operation);
2043 ht_oper = (struct ieee80211_ht_operation *)pos;
2044 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2045 chandef->chan->center_freq);
2046 switch (chandef->width) {
2047 case NL80211_CHAN_WIDTH_160:
2048 case NL80211_CHAN_WIDTH_80P80:
2049 case NL80211_CHAN_WIDTH_80:
2050 case NL80211_CHAN_WIDTH_40:
2051 if (chandef->center_freq1 > chandef->chan->center_freq)
2052 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2053 else
2054 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2055 break;
2056 default:
2057 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2058 break;
2059 }
2060 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2061 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2062 chandef->width != NL80211_CHAN_WIDTH_20)
2063 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2064
2065 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2066 ht_oper->stbc_param = 0x0000;
2067
2068 /* It seems that Basic MCS set and Supported MCS set
2069 are identical for the first 10 bytes */
2070 memset(&ht_oper->basic_set, 0, 16);
2071 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2072
2073 return pos + sizeof(struct ieee80211_ht_operation);
2074}
2075
2076void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2077 const struct ieee80211_ht_operation *ht_oper,
2078 struct cfg80211_chan_def *chandef)
2079{
2080 enum nl80211_channel_type channel_type;
2081
2082 if (!ht_oper) {
2083 cfg80211_chandef_create(chandef, control_chan,
2084 NL80211_CHAN_NO_HT);
2085 return;
2086 }
2087
2088 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2089 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2090 channel_type = NL80211_CHAN_HT20;
2091 break;
2092 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2093 channel_type = NL80211_CHAN_HT40PLUS;
2094 break;
2095 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2096 channel_type = NL80211_CHAN_HT40MINUS;
2097 break;
2098 default:
2099 channel_type = NL80211_CHAN_NO_HT;
2100 }
2101
2102 cfg80211_chandef_create(chandef, control_chan, channel_type);
2103}
2104
2105int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2106 const struct ieee80211_supported_band *sband,
2107 const u8 *srates, int srates_len, u32 *rates)
2108{
2109 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2110 int shift = ieee80211_chandef_get_shift(chandef);
2111 struct ieee80211_rate *br;
2112 int brate, rate, i, j, count = 0;
2113
2114 *rates = 0;
2115
2116 for (i = 0; i < srates_len; i++) {
2117 rate = srates[i] & 0x7f;
2118
2119 for (j = 0; j < sband->n_bitrates; j++) {
2120 br = &sband->bitrates[j];
2121 if ((rate_flags & br->flags) != rate_flags)
2122 continue;
2123
2124 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2125 if (brate == rate) {
2126 *rates |= BIT(j);
2127 count++;
2128 break;
2129 }
2130 }
2131 }
2132 return count;
2133}
2134
2135int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2136 struct sk_buff *skb, bool need_basic,
2137 enum ieee80211_band band)
2138{
2139 struct ieee80211_local *local = sdata->local;
2140 struct ieee80211_supported_band *sband;
2141 int rate, shift;
2142 u8 i, rates, *pos;
2143 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2144 u32 rate_flags;
2145
2146 shift = ieee80211_vif_get_shift(&sdata->vif);
2147 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2148 sband = local->hw.wiphy->bands[band];
2149 rates = 0;
2150 for (i = 0; i < sband->n_bitrates; i++) {
2151 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2152 continue;
2153 rates++;
2154 }
2155 if (rates > 8)
2156 rates = 8;
2157
2158 if (skb_tailroom(skb) < rates + 2)
2159 return -ENOMEM;
2160
2161 pos = skb_put(skb, rates + 2);
2162 *pos++ = WLAN_EID_SUPP_RATES;
2163 *pos++ = rates;
2164 for (i = 0; i < rates; i++) {
2165 u8 basic = 0;
2166 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2167 continue;
2168
2169 if (need_basic && basic_rates & BIT(i))
2170 basic = 0x80;
2171 rate = sband->bitrates[i].bitrate;
2172 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2173 5 * (1 << shift));
2174 *pos++ = basic | (u8) rate;
2175 }
2176
2177 return 0;
2178}
2179
2180int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2181 struct sk_buff *skb, bool need_basic,
2182 enum ieee80211_band band)
2183{
2184 struct ieee80211_local *local = sdata->local;
2185 struct ieee80211_supported_band *sband;
2186 int rate, shift;
2187 u8 i, exrates, *pos;
2188 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2189 u32 rate_flags;
2190
2191 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2192 shift = ieee80211_vif_get_shift(&sdata->vif);
2193
2194 sband = local->hw.wiphy->bands[band];
2195 exrates = 0;
2196 for (i = 0; i < sband->n_bitrates; i++) {
2197 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2198 continue;
2199 exrates++;
2200 }
2201
2202 if (exrates > 8)
2203 exrates -= 8;
2204 else
2205 exrates = 0;
2206
2207 if (skb_tailroom(skb) < exrates + 2)
2208 return -ENOMEM;
2209
2210 if (exrates) {
2211 pos = skb_put(skb, exrates + 2);
2212 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2213 *pos++ = exrates;
2214 for (i = 8; i < sband->n_bitrates; i++) {
2215 u8 basic = 0;
2216 if ((rate_flags & sband->bitrates[i].flags)
2217 != rate_flags)
2218 continue;
2219 if (need_basic && basic_rates & BIT(i))
2220 basic = 0x80;
2221 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2222 5 * (1 << shift));
2223 *pos++ = basic | (u8) rate;
2224 }
2225 }
2226 return 0;
2227}
2228
2229int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2230{
2231 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2233
2234 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2235 /* non-managed type inferfaces */
2236 return 0;
2237 }
2238 return ifmgd->ave_beacon_signal / 16;
2239}
2240EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2241
2242u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2243{
2244 if (!mcs)
2245 return 1;
2246
2247 /* TODO: consider rx_highest */
2248
2249 if (mcs->rx_mask[3])
2250 return 4;
2251 if (mcs->rx_mask[2])
2252 return 3;
2253 if (mcs->rx_mask[1])
2254 return 2;
2255 return 1;
2256}
2257
2258/**
2259 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2260 * @local: mac80211 hw info struct
2261 * @status: RX status
2262 * @mpdu_len: total MPDU length (including FCS)
2263 * @mpdu_offset: offset into MPDU to calculate timestamp at
2264 *
2265 * This function calculates the RX timestamp at the given MPDU offset, taking
2266 * into account what the RX timestamp was. An offset of 0 will just normalize
2267 * the timestamp to TSF at beginning of MPDU reception.
2268 */
2269u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2270 struct ieee80211_rx_status *status,
2271 unsigned int mpdu_len,
2272 unsigned int mpdu_offset)
2273{
2274 u64 ts = status->mactime;
2275 struct rate_info ri;
2276 u16 rate;
2277
2278 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2279 return 0;
2280
2281 memset(&ri, 0, sizeof(ri));
2282
2283 /* Fill cfg80211 rate info */
2284 if (status->flag & RX_FLAG_HT) {
2285 ri.mcs = status->rate_idx;
2286 ri.flags |= RATE_INFO_FLAGS_MCS;
2287 if (status->flag & RX_FLAG_40MHZ)
2288 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2289 if (status->flag & RX_FLAG_SHORT_GI)
2290 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2291 } else if (status->flag & RX_FLAG_VHT) {
2292 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2293 ri.mcs = status->rate_idx;
2294 ri.nss = status->vht_nss;
2295 if (status->flag & RX_FLAG_40MHZ)
2296 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2297 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2298 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2299 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2300 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2301 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2302 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2303 if (status->flag & RX_FLAG_SHORT_GI)
2304 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2305 } else {
2306 struct ieee80211_supported_band *sband;
2307 int shift = 0;
2308 int bitrate;
2309
2310 if (status->flag & RX_FLAG_10MHZ)
2311 shift = 1;
2312 if (status->flag & RX_FLAG_5MHZ)
2313 shift = 2;
2314
2315 sband = local->hw.wiphy->bands[status->band];
2316 bitrate = sband->bitrates[status->rate_idx].bitrate;
2317 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2318 }
2319
2320 rate = cfg80211_calculate_bitrate(&ri);
2321 if (WARN_ONCE(!rate,
2322 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2323 status->flag, status->rate_idx, status->vht_nss))
2324 return 0;
2325
2326 /* rewind from end of MPDU */
2327 if (status->flag & RX_FLAG_MACTIME_END)
2328 ts -= mpdu_len * 8 * 10 / rate;
2329
2330 ts += mpdu_offset * 8 * 10 / rate;
2331
2332 return ts;
2333}
2334
2335void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2336{
2337 struct ieee80211_sub_if_data *sdata;
2338 struct cfg80211_chan_def chandef;
2339
2340 mutex_lock(&local->mtx);
2341 mutex_lock(&local->iflist_mtx);
2342 list_for_each_entry(sdata, &local->interfaces, list) {
2343 /* it might be waiting for the local->mtx, but then
2344 * by the time it gets it, sdata->wdev.cac_started
2345 * will no longer be true
2346 */
2347 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2348
2349 if (sdata->wdev.cac_started) {
2350 chandef = sdata->vif.bss_conf.chandef;
2351 ieee80211_vif_release_channel(sdata);
2352 cfg80211_cac_event(sdata->dev,
2353 &chandef,
2354 NL80211_RADAR_CAC_ABORTED,
2355 GFP_KERNEL);
2356 }
2357 }
2358 mutex_unlock(&local->iflist_mtx);
2359 mutex_unlock(&local->mtx);
2360}
2361
2362void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2363{
2364 struct ieee80211_local *local =
2365 container_of(work, struct ieee80211_local, radar_detected_work);
2366 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2367
2368 ieee80211_dfs_cac_cancel(local);
2369
2370 if (local->use_chanctx)
2371 /* currently not handled */
2372 WARN_ON(1);
2373 else
2374 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2375}
2376
2377void ieee80211_radar_detected(struct ieee80211_hw *hw)
2378{
2379 struct ieee80211_local *local = hw_to_local(hw);
2380
2381 trace_api_radar_detected(local);
2382
2383 ieee80211_queue_work(hw, &local->radar_detected_work);
2384}
2385EXPORT_SYMBOL(ieee80211_radar_detected);
2386
2387u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2388{
2389 u32 ret;
2390 int tmp;
2391
2392 switch (c->width) {
2393 case NL80211_CHAN_WIDTH_20:
2394 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2395 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2396 break;
2397 case NL80211_CHAN_WIDTH_40:
2398 c->width = NL80211_CHAN_WIDTH_20;
2399 c->center_freq1 = c->chan->center_freq;
2400 ret = IEEE80211_STA_DISABLE_40MHZ |
2401 IEEE80211_STA_DISABLE_VHT;
2402 break;
2403 case NL80211_CHAN_WIDTH_80:
2404 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2405 /* n_P40 */
2406 tmp /= 2;
2407 /* freq_P40 */
2408 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2409 c->width = NL80211_CHAN_WIDTH_40;
2410 ret = IEEE80211_STA_DISABLE_VHT;
2411 break;
2412 case NL80211_CHAN_WIDTH_80P80:
2413 c->center_freq2 = 0;
2414 c->width = NL80211_CHAN_WIDTH_80;
2415 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2416 IEEE80211_STA_DISABLE_160MHZ;
2417 break;
2418 case NL80211_CHAN_WIDTH_160:
2419 /* n_P20 */
2420 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2421 /* n_P80 */
2422 tmp /= 4;
2423 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2424 c->width = NL80211_CHAN_WIDTH_80;
2425 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2426 IEEE80211_STA_DISABLE_160MHZ;
2427 break;
2428 default:
2429 case NL80211_CHAN_WIDTH_20_NOHT:
2430 WARN_ON_ONCE(1);
2431 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2432 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2433 break;
2434 case NL80211_CHAN_WIDTH_5:
2435 case NL80211_CHAN_WIDTH_10:
2436 WARN_ON_ONCE(1);
2437 /* keep c->width */
2438 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2439 break;
2440 }
2441
2442 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2443
2444 return ret;
2445}
2446
2447/*
2448 * Returns true if smps_mode_new is strictly more restrictive than
2449 * smps_mode_old.
2450 */
2451bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2452 enum ieee80211_smps_mode smps_mode_new)
2453{
2454 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2455 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2456 return false;
2457
2458 switch (smps_mode_old) {
2459 case IEEE80211_SMPS_STATIC:
2460 return false;
2461 case IEEE80211_SMPS_DYNAMIC:
2462 return smps_mode_new == IEEE80211_SMPS_STATIC;
2463 case IEEE80211_SMPS_OFF:
2464 return smps_mode_new != IEEE80211_SMPS_OFF;
2465 default:
2466 WARN_ON(1);
2467 }
2468
2469 return false;
2470}
2471
2472int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2473 struct cfg80211_csa_settings *csa_settings)
2474{
2475 struct sk_buff *skb;
2476 struct ieee80211_mgmt *mgmt;
2477 struct ieee80211_local *local = sdata->local;
2478 int freq;
2479 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2480 sizeof(mgmt->u.action.u.chan_switch);
2481 u8 *pos;
2482
2483 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2484 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2485 return -EOPNOTSUPP;
2486
2487 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2488 5 + /* channel switch announcement element */
2489 3 + /* secondary channel offset element */
2490 8); /* mesh channel switch parameters element */
2491 if (!skb)
2492 return -ENOMEM;
2493
2494 skb_reserve(skb, local->tx_headroom);
2495 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2496 memset(mgmt, 0, hdr_len);
2497 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2498 IEEE80211_STYPE_ACTION);
2499
2500 eth_broadcast_addr(mgmt->da);
2501 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2502 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2503 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2504 } else {
2505 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2506 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2507 }
2508 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2509 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2510 pos = skb_put(skb, 5);
2511 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2512 *pos++ = 3; /* IE length */
2513 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2514 freq = csa_settings->chandef.chan->center_freq;
2515 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2516 *pos++ = csa_settings->count; /* count */
2517
2518 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2519 enum nl80211_channel_type ch_type;
2520
2521 skb_put(skb, 3);
2522 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2523 *pos++ = 1; /* IE length */
2524 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2525 if (ch_type == NL80211_CHAN_HT40PLUS)
2526 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2527 else
2528 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2529 }
2530
2531 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2532 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2533
2534 skb_put(skb, 8);
2535 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2536 *pos++ = 6; /* IE length */
2537 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2538 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2539 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2540 *pos++ |= csa_settings->block_tx ?
2541 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2542 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2543 pos += 2;
2544 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2545 pos += 2;
2546 }
2547
2548 ieee80211_tx_skb(sdata, skb);
2549 return 0;
2550}
2551
2552bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2553{
2554 return !(cs == NULL || cs->cipher == 0 ||
2555 cs->hdr_len < cs->pn_len + cs->pn_off ||
2556 cs->hdr_len <= cs->key_idx_off ||
2557 cs->key_idx_shift > 7 ||
2558 cs->key_idx_mask == 0);
2559}
2560
2561bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2562{
2563 int i;
2564
2565 /* Ensure we have enough iftype bitmap space for all iftype values */
2566 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2567
2568 for (i = 0; i < n; i++)
2569 if (!ieee80211_cs_valid(&cs[i]))
2570 return false;
2571
2572 return true;
2573}
2574
2575const struct ieee80211_cipher_scheme *
2576ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2577 enum nl80211_iftype iftype)
2578{
2579 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2580 int n = local->hw.n_cipher_schemes;
2581 int i;
2582 const struct ieee80211_cipher_scheme *cs = NULL;
2583
2584 for (i = 0; i < n; i++) {
2585 if (l[i].cipher == cipher) {
2586 cs = &l[i];
2587 break;
2588 }
2589 }
2590
2591 if (!cs || !(cs->iftype & BIT(iftype)))
2592 return NULL;
2593
2594 return cs;
2595}
2596
2597int ieee80211_cs_headroom(struct ieee80211_local *local,
2598 struct cfg80211_crypto_settings *crypto,
2599 enum nl80211_iftype iftype)
2600{
2601 const struct ieee80211_cipher_scheme *cs;
2602 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2603 int i;
2604
2605 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2606 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2607 iftype);
2608
2609 if (cs && headroom < cs->hdr_len)
2610 headroom = cs->hdr_len;
2611 }
2612
2613 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2614 if (cs && headroom < cs->hdr_len)
2615 headroom = cs->hdr_len;
2616
2617 return headroom;
2618}
2619
2620static bool
2621ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2622{
2623 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2624 int skip;
2625
2626 if (end > 0)
2627 return false;
2628
2629 /* End time is in the past, check for repetitions */
2630 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2631 if (data->count[i] < 255) {
2632 if (data->count[i] <= skip) {
2633 data->count[i] = 0;
2634 return false;
2635 }
2636
2637 data->count[i] -= skip;
2638 }
2639
2640 data->desc[i].start += skip * data->desc[i].interval;
2641
2642 return true;
2643}
2644
2645static bool
2646ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2647 s32 *offset)
2648{
2649 bool ret = false;
2650 int i;
2651
2652 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2653 s32 cur;
2654
2655 if (!data->count[i])
2656 continue;
2657
2658 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2659 ret = true;
2660
2661 cur = data->desc[i].start - tsf;
2662 if (cur > *offset)
2663 continue;
2664
2665 cur = data->desc[i].start + data->desc[i].duration - tsf;
2666 if (cur > *offset)
2667 *offset = cur;
2668 }
2669
2670 return ret;
2671}
2672
2673static u32
2674ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2675{
2676 s32 offset = 0;
2677 int tries = 0;
2678 /*
2679 * arbitrary limit, used to avoid infinite loops when combined NoA
2680 * descriptors cover the full time period.
2681 */
2682 int max_tries = 5;
2683
2684 ieee80211_extend_absent_time(data, tsf, &offset);
2685 do {
2686 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2687 break;
2688
2689 tries++;
2690 } while (tries < max_tries);
2691
2692 return offset;
2693}
2694
2695void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2696{
2697 u32 next_offset = BIT(31) - 1;
2698 int i;
2699
2700 data->absent = 0;
2701 data->has_next_tsf = false;
2702 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2703 s32 start;
2704
2705 if (!data->count[i])
2706 continue;
2707
2708 ieee80211_extend_noa_desc(data, tsf, i);
2709 start = data->desc[i].start - tsf;
2710 if (start <= 0)
2711 data->absent |= BIT(i);
2712
2713 if (next_offset > start)
2714 next_offset = start;
2715
2716 data->has_next_tsf = true;
2717 }
2718
2719 if (data->absent)
2720 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2721
2722 data->next_tsf = tsf + next_offset;
2723}
2724EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2725
2726int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2727 struct ieee80211_noa_data *data, u32 tsf)
2728{
2729 int ret = 0;
2730 int i;
2731
2732 memset(data, 0, sizeof(*data));
2733
2734 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2735 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2736
2737 if (!desc->count || !desc->duration)
2738 continue;
2739
2740 data->count[i] = desc->count;
2741 data->desc[i].start = le32_to_cpu(desc->start_time);
2742 data->desc[i].duration = le32_to_cpu(desc->duration);
2743 data->desc[i].interval = le32_to_cpu(desc->interval);
2744
2745 if (data->count[i] > 1 &&
2746 data->desc[i].interval < data->desc[i].duration)
2747 continue;
2748
2749 ieee80211_extend_noa_desc(data, tsf, i);
2750 ret++;
2751 }
2752
2753 if (ret)
2754 ieee80211_update_p2p_noa(data, tsf);
2755
2756 return ret;
2757}
2758EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2759
2760void ieee80211_recalc_dtim(struct ieee80211_local *local,
2761 struct ieee80211_sub_if_data *sdata)
2762{
2763 u64 tsf = drv_get_tsf(local, sdata);
2764 u64 dtim_count = 0;
2765 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2766 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2767 struct ps_data *ps;
2768 u8 bcns_from_dtim;
2769
2770 if (tsf == -1ULL || !beacon_int || !dtim_period)
2771 return;
2772
2773 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2774 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2775 if (!sdata->bss)
2776 return;
2777
2778 ps = &sdata->bss->ps;
2779 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2780 ps = &sdata->u.mesh.ps;
2781 } else {
2782 return;
2783 }
2784
2785 /*
2786 * actually finds last dtim_count, mac80211 will update in
2787 * __beacon_add_tim().
2788 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2789 */
2790 do_div(tsf, beacon_int);
2791 bcns_from_dtim = do_div(tsf, dtim_period);
2792 /* just had a DTIM */
2793 if (!bcns_from_dtim)
2794 dtim_count = 0;
2795 else
2796 dtim_count = dtim_period - bcns_from_dtim;
2797
2798 ps->dtim_count = dtim_count;
2799}