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mac80211: TDLS: support VHT between peers
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1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15#include <net/mac80211.h>
16#include <linux/netdevice.h>
17#include <linux/export.h>
18#include <linux/types.h>
19#include <linux/slab.h>
20#include <linux/skbuff.h>
21#include <linux/etherdevice.h>
22#include <linux/if_arp.h>
23#include <linux/bitmap.h>
24#include <linux/crc32.h>
25#include <net/net_namespace.h>
26#include <net/cfg80211.h>
27#include <net/rtnetlink.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 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47}
48EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
49
50u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
51 enum nl80211_iftype type)
52{
53 __le16 fc = hdr->frame_control;
54
55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
57 return NULL;
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_mgmt(fc)) {
74 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
76 return hdr->addr3;
77 }
78
79 if (ieee80211_is_ctl(fc)) {
80 if (ieee80211_is_pspoll(fc))
81 return hdr->addr1;
82
83 if (ieee80211_is_back_req(fc)) {
84 switch (type) {
85 case NL80211_IFTYPE_STATION:
86 return hdr->addr2;
87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
89 return hdr->addr1;
90 default:
91 break; /* fall through to the return */
92 }
93 }
94 }
95
96 return NULL;
97}
98
99void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
100{
101 struct sk_buff *skb;
102 struct ieee80211_hdr *hdr;
103
104 skb_queue_walk(&tx->skbs, skb) {
105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
107 }
108}
109
110int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
111 int rate, int erp, int short_preamble,
112 int shift)
113{
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
126 */
127
128 if (band == IEEE80211_BAND_5GHZ || erp) {
129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
142 dur = 16; /* SIFS + signal ext */
143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175}
176
177/* Exported duration function for driver use */
178__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
180 enum ieee80211_band band,
181 size_t frame_len,
182 struct ieee80211_rate *rate)
183{
184 struct ieee80211_sub_if_data *sdata;
185 u16 dur;
186 int erp, shift = 0;
187 bool short_preamble = false;
188
189 erp = 0;
190 if (vif) {
191 sdata = vif_to_sdata(vif);
192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
195 shift = ieee80211_vif_get_shift(vif);
196 }
197
198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
199 short_preamble, shift);
200
201 return cpu_to_le16(dur);
202}
203EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
205__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
207 const struct ieee80211_tx_info *frame_txctl)
208{
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
211 struct ieee80211_sub_if_data *sdata;
212 bool short_preamble;
213 int erp, shift = 0, bitrate;
214 u16 dur;
215 struct ieee80211_supported_band *sband;
216
217 sband = local->hw.wiphy->bands[frame_txctl->band];
218
219 short_preamble = false;
220
221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
222
223 erp = 0;
224 if (vif) {
225 sdata = vif_to_sdata(vif);
226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
229 shift = ieee80211_vif_get_shift(vif);
230 }
231
232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
234 /* CTS duration */
235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 /* Data frame duration */
238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
239 erp, short_preamble, shift);
240 /* ACK duration */
241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
242 erp, short_preamble, shift);
243
244 return cpu_to_le16(dur);
245}
246EXPORT_SYMBOL(ieee80211_rts_duration);
247
248__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
250 size_t frame_len,
251 const struct ieee80211_tx_info *frame_txctl)
252{
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
255 struct ieee80211_sub_if_data *sdata;
256 bool short_preamble;
257 int erp, shift = 0, bitrate;
258 u16 dur;
259 struct ieee80211_supported_band *sband;
260
261 sband = local->hw.wiphy->bands[frame_txctl->band];
262
263 short_preamble = false;
264
265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
266 erp = 0;
267 if (vif) {
268 sdata = vif_to_sdata(vif);
269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
272 shift = ieee80211_vif_get_shift(vif);
273 }
274
275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
277 /* Data frame duration */
278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
279 erp, short_preamble, shift);
280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
281 /* ACK duration */
282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
283 erp, short_preamble, shift);
284 }
285
286 return cpu_to_le16(dur);
287}
288EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
290void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291{
292 struct ieee80211_sub_if_data *sdata;
293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
301 if (!sdata->dev)
302 continue;
303
304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
308 for (ac = 0; ac < n_acs; ac++) {
309 int ac_queue = sdata->vif.hw_queue[ac];
310
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318}
319
320static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
321 enum queue_stop_reason reason,
322 bool refcounted)
323{
324 struct ieee80211_local *local = hw_to_local(hw);
325
326 trace_wake_queue(local, queue, reason);
327
328 if (WARN_ON(queue >= hw->queues))
329 return;
330
331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
348 ieee80211_propagate_queue_wake(local, queue);
349 rcu_read_unlock();
350 } else
351 tasklet_schedule(&local->tx_pending_tasklet);
352}
353
354void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
355 enum queue_stop_reason reason,
356 bool refcounted)
357{
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364}
365
366void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367{
368 ieee80211_wake_queue_by_reason(hw, queue,
369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
371}
372EXPORT_SYMBOL(ieee80211_wake_queue);
373
374static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
375 enum queue_stop_reason reason,
376 bool refcounted)
377{
378 struct ieee80211_local *local = hw_to_local(hw);
379 struct ieee80211_sub_if_data *sdata;
380 int n_acs = IEEE80211_NUM_ACS;
381
382 trace_stop_queue(local, queue, reason);
383
384 if (WARN_ON(queue >= hw->queues))
385 return;
386
387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
391
392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
394
395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
398 rcu_read_lock();
399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
402 if (!sdata->dev)
403 continue;
404
405 for (ac = 0; ac < n_acs; ac++) {
406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
411 rcu_read_unlock();
412}
413
414void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
415 enum queue_stop_reason reason,
416 bool refcounted)
417{
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424}
425
426void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427{
428 ieee80211_stop_queue_by_reason(hw, queue,
429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
431}
432EXPORT_SYMBOL(ieee80211_stop_queue);
433
434void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436{
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
440 int queue = info->hw_queue;
441
442 if (WARN_ON(!info->control.vif)) {
443 ieee80211_free_txskb(&local->hw, skb);
444 return;
445 }
446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
450 __skb_queue_tail(&local->pending[queue], skb);
451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454}
455
456void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
458{
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
462 int queue, i;
463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
465 while ((skb = skb_dequeue(skbs))) {
466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
469 ieee80211_free_txskb(&local->hw, skb);
470 continue;
471 }
472
473 queue = info->hw_queue;
474
475 __ieee80211_stop_queue(hw, queue,
476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
478
479 __skb_queue_tail(&local->pending[queue], skb);
480 }
481
482 for (i = 0; i < hw->queues; i++)
483 __ieee80211_wake_queue(hw, i,
484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
487}
488
489void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
490 unsigned long queues,
491 enum queue_stop_reason reason,
492 bool refcounted)
493{
494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
496 int i;
497
498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
500 for_each_set_bit(i, &queues, hw->queues)
501 __ieee80211_stop_queue(hw, i, reason, refcounted);
502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504}
505
506void ieee80211_stop_queues(struct ieee80211_hw *hw)
507{
508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
511}
512EXPORT_SYMBOL(ieee80211_stop_queues);
513
514int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515{
516 struct ieee80211_local *local = hw_to_local(hw);
517 unsigned long flags;
518 int ret;
519
520 if (WARN_ON(queue >= hw->queues))
521 return true;
522
523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
528}
529EXPORT_SYMBOL(ieee80211_queue_stopped);
530
531void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
532 unsigned long queues,
533 enum queue_stop_reason reason,
534 bool refcounted)
535{
536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
538 int i;
539
540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
542 for_each_set_bit(i, &queues, hw->queues)
543 __ieee80211_wake_queue(hw, i, reason, refcounted);
544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546}
547
548void ieee80211_wake_queues(struct ieee80211_hw *hw)
549{
550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
553}
554EXPORT_SYMBOL(ieee80211_wake_queues);
555
556static unsigned int
557ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
559{
560 unsigned int queues;
561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
576 return queues;
577}
578
579void __ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
581 unsigned int queues, bool drop)
582{
583 if (!local->ops->flush)
584 return;
585
586 /*
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
589 */
590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591 queues = ieee80211_get_vif_queues(local, sdata);
592
593 ieee80211_stop_queues_by_reason(&local->hw, queues,
594 IEEE80211_QUEUE_STOP_REASON_FLUSH,
595 false);
596
597 drv_flush(local, sdata, queues, drop);
598
599 ieee80211_wake_queues_by_reason(&local->hw, queues,
600 IEEE80211_QUEUE_STOP_REASON_FLUSH,
601 false);
602}
603
604void ieee80211_flush_queues(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata, bool drop)
606{
607 __ieee80211_flush_queues(local, sdata, 0, drop);
608}
609
610void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611 struct ieee80211_sub_if_data *sdata,
612 enum queue_stop_reason reason)
613{
614 ieee80211_stop_queues_by_reason(&local->hw,
615 ieee80211_get_vif_queues(local, sdata),
616 reason, true);
617}
618
619void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata,
621 enum queue_stop_reason reason)
622{
623 ieee80211_wake_queues_by_reason(&local->hw,
624 ieee80211_get_vif_queues(local, sdata),
625 reason, true);
626}
627
628static void __iterate_active_interfaces(struct ieee80211_local *local,
629 u32 iter_flags,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
632 void *data)
633{
634 struct ieee80211_sub_if_data *sdata;
635
636 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
637 switch (sdata->vif.type) {
638 case NL80211_IFTYPE_MONITOR:
639 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
640 continue;
641 break;
642 case NL80211_IFTYPE_AP_VLAN:
643 continue;
644 default:
645 break;
646 }
647 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
648 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
649 continue;
650 if (ieee80211_sdata_running(sdata))
651 iterator(data, sdata->vif.addr,
652 &sdata->vif);
653 }
654
655 sdata = rcu_dereference_check(local->monitor_sdata,
656 lockdep_is_held(&local->iflist_mtx) ||
657 lockdep_rtnl_is_held());
658 if (sdata &&
659 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
660 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
661 iterator(data, sdata->vif.addr, &sdata->vif);
662}
663
664void ieee80211_iterate_active_interfaces(
665 struct ieee80211_hw *hw, u32 iter_flags,
666 void (*iterator)(void *data, u8 *mac,
667 struct ieee80211_vif *vif),
668 void *data)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 mutex_lock(&local->iflist_mtx);
673 __iterate_active_interfaces(local, iter_flags, iterator, data);
674 mutex_unlock(&local->iflist_mtx);
675}
676EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
677
678void ieee80211_iterate_active_interfaces_atomic(
679 struct ieee80211_hw *hw, u32 iter_flags,
680 void (*iterator)(void *data, u8 *mac,
681 struct ieee80211_vif *vif),
682 void *data)
683{
684 struct ieee80211_local *local = hw_to_local(hw);
685
686 rcu_read_lock();
687 __iterate_active_interfaces(local, iter_flags, iterator, data);
688 rcu_read_unlock();
689}
690EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
691
692void ieee80211_iterate_active_interfaces_rtnl(
693 struct ieee80211_hw *hw, u32 iter_flags,
694 void (*iterator)(void *data, u8 *mac,
695 struct ieee80211_vif *vif),
696 void *data)
697{
698 struct ieee80211_local *local = hw_to_local(hw);
699
700 ASSERT_RTNL();
701
702 __iterate_active_interfaces(local, iter_flags, iterator, data);
703}
704EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
705
706static void __iterate_stations(struct ieee80211_local *local,
707 void (*iterator)(void *data,
708 struct ieee80211_sta *sta),
709 void *data)
710{
711 struct sta_info *sta;
712
713 list_for_each_entry_rcu(sta, &local->sta_list, list) {
714 if (!sta->uploaded)
715 continue;
716
717 iterator(data, &sta->sta);
718 }
719}
720
721void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
722 void (*iterator)(void *data,
723 struct ieee80211_sta *sta),
724 void *data)
725{
726 struct ieee80211_local *local = hw_to_local(hw);
727
728 rcu_read_lock();
729 __iterate_stations(local, iterator, data);
730 rcu_read_unlock();
731}
732EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
733
734struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
735{
736 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
737
738 if (!ieee80211_sdata_running(sdata) ||
739 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
740 return NULL;
741 return &sdata->vif;
742}
743EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
744
745/*
746 * Nothing should have been stuffed into the workqueue during
747 * the suspend->resume cycle. Since we can't check each caller
748 * of this function if we are already quiescing / suspended,
749 * check here and don't WARN since this can actually happen when
750 * the rx path (for example) is racing against __ieee80211_suspend
751 * and suspending / quiescing was set after the rx path checked
752 * them.
753 */
754static bool ieee80211_can_queue_work(struct ieee80211_local *local)
755{
756 if (local->quiescing || (local->suspended && !local->resuming)) {
757 pr_warn("queueing ieee80211 work while going to suspend\n");
758 return false;
759 }
760
761 return true;
762}
763
764void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
765{
766 struct ieee80211_local *local = hw_to_local(hw);
767
768 if (!ieee80211_can_queue_work(local))
769 return;
770
771 queue_work(local->workqueue, work);
772}
773EXPORT_SYMBOL(ieee80211_queue_work);
774
775void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
776 struct delayed_work *dwork,
777 unsigned long delay)
778{
779 struct ieee80211_local *local = hw_to_local(hw);
780
781 if (!ieee80211_can_queue_work(local))
782 return;
783
784 queue_delayed_work(local->workqueue, dwork, delay);
785}
786EXPORT_SYMBOL(ieee80211_queue_delayed_work);
787
788u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
789 struct ieee802_11_elems *elems,
790 u64 filter, u32 crc)
791{
792 size_t left = len;
793 const u8 *pos = start;
794 bool calc_crc = filter != 0;
795 DECLARE_BITMAP(seen_elems, 256);
796 const u8 *ie;
797
798 bitmap_zero(seen_elems, 256);
799 memset(elems, 0, sizeof(*elems));
800 elems->ie_start = start;
801 elems->total_len = len;
802
803 while (left >= 2) {
804 u8 id, elen;
805 bool elem_parse_failed;
806
807 id = *pos++;
808 elen = *pos++;
809 left -= 2;
810
811 if (elen > left) {
812 elems->parse_error = true;
813 break;
814 }
815
816 switch (id) {
817 case WLAN_EID_SSID:
818 case WLAN_EID_SUPP_RATES:
819 case WLAN_EID_FH_PARAMS:
820 case WLAN_EID_DS_PARAMS:
821 case WLAN_EID_CF_PARAMS:
822 case WLAN_EID_TIM:
823 case WLAN_EID_IBSS_PARAMS:
824 case WLAN_EID_CHALLENGE:
825 case WLAN_EID_RSN:
826 case WLAN_EID_ERP_INFO:
827 case WLAN_EID_EXT_SUPP_RATES:
828 case WLAN_EID_HT_CAPABILITY:
829 case WLAN_EID_HT_OPERATION:
830 case WLAN_EID_VHT_CAPABILITY:
831 case WLAN_EID_VHT_OPERATION:
832 case WLAN_EID_MESH_ID:
833 case WLAN_EID_MESH_CONFIG:
834 case WLAN_EID_PEER_MGMT:
835 case WLAN_EID_PREQ:
836 case WLAN_EID_PREP:
837 case WLAN_EID_PERR:
838 case WLAN_EID_RANN:
839 case WLAN_EID_CHANNEL_SWITCH:
840 case WLAN_EID_EXT_CHANSWITCH_ANN:
841 case WLAN_EID_COUNTRY:
842 case WLAN_EID_PWR_CONSTRAINT:
843 case WLAN_EID_TIMEOUT_INTERVAL:
844 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
845 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
846 case WLAN_EID_CHAN_SWITCH_PARAM:
847 case WLAN_EID_EXT_CAPABILITY:
848 case WLAN_EID_CHAN_SWITCH_TIMING:
849 case WLAN_EID_LINK_ID:
850 /*
851 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
852 * that if the content gets bigger it might be needed more than once
853 */
854 if (test_bit(id, seen_elems)) {
855 elems->parse_error = true;
856 left -= elen;
857 pos += elen;
858 continue;
859 }
860 break;
861 }
862
863 if (calc_crc && id < 64 && (filter & (1ULL << id)))
864 crc = crc32_be(crc, pos - 2, elen + 2);
865
866 elem_parse_failed = false;
867
868 switch (id) {
869 case WLAN_EID_LINK_ID:
870 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
871 elem_parse_failed = true;
872 break;
873 }
874 elems->lnk_id = (void *)(pos - 2);
875 break;
876 case WLAN_EID_CHAN_SWITCH_TIMING:
877 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
878 elem_parse_failed = true;
879 break;
880 }
881 elems->ch_sw_timing = (void *)pos;
882 break;
883 case WLAN_EID_EXT_CAPABILITY:
884 elems->ext_capab = pos;
885 elems->ext_capab_len = elen;
886 break;
887 case WLAN_EID_SSID:
888 elems->ssid = pos;
889 elems->ssid_len = elen;
890 break;
891 case WLAN_EID_SUPP_RATES:
892 elems->supp_rates = pos;
893 elems->supp_rates_len = elen;
894 break;
895 case WLAN_EID_DS_PARAMS:
896 if (elen >= 1)
897 elems->ds_params = pos;
898 else
899 elem_parse_failed = true;
900 break;
901 case WLAN_EID_TIM:
902 if (elen >= sizeof(struct ieee80211_tim_ie)) {
903 elems->tim = (void *)pos;
904 elems->tim_len = elen;
905 } else
906 elem_parse_failed = true;
907 break;
908 case WLAN_EID_CHALLENGE:
909 elems->challenge = pos;
910 elems->challenge_len = elen;
911 break;
912 case WLAN_EID_VENDOR_SPECIFIC:
913 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
914 pos[2] == 0xf2) {
915 /* Microsoft OUI (00:50:F2) */
916
917 if (calc_crc)
918 crc = crc32_be(crc, pos - 2, elen + 2);
919
920 if (elen >= 5 && pos[3] == 2) {
921 /* OUI Type 2 - WMM IE */
922 if (pos[4] == 0) {
923 elems->wmm_info = pos;
924 elems->wmm_info_len = elen;
925 } else if (pos[4] == 1) {
926 elems->wmm_param = pos;
927 elems->wmm_param_len = elen;
928 }
929 }
930 }
931 break;
932 case WLAN_EID_RSN:
933 elems->rsn = pos;
934 elems->rsn_len = elen;
935 break;
936 case WLAN_EID_ERP_INFO:
937 if (elen >= 1)
938 elems->erp_info = pos;
939 else
940 elem_parse_failed = true;
941 break;
942 case WLAN_EID_EXT_SUPP_RATES:
943 elems->ext_supp_rates = pos;
944 elems->ext_supp_rates_len = elen;
945 break;
946 case WLAN_EID_HT_CAPABILITY:
947 if (elen >= sizeof(struct ieee80211_ht_cap))
948 elems->ht_cap_elem = (void *)pos;
949 else
950 elem_parse_failed = true;
951 break;
952 case WLAN_EID_HT_OPERATION:
953 if (elen >= sizeof(struct ieee80211_ht_operation))
954 elems->ht_operation = (void *)pos;
955 else
956 elem_parse_failed = true;
957 break;
958 case WLAN_EID_VHT_CAPABILITY:
959 if (elen >= sizeof(struct ieee80211_vht_cap))
960 elems->vht_cap_elem = (void *)pos;
961 else
962 elem_parse_failed = true;
963 break;
964 case WLAN_EID_VHT_OPERATION:
965 if (elen >= sizeof(struct ieee80211_vht_operation))
966 elems->vht_operation = (void *)pos;
967 else
968 elem_parse_failed = true;
969 break;
970 case WLAN_EID_OPMODE_NOTIF:
971 if (elen > 0)
972 elems->opmode_notif = pos;
973 else
974 elem_parse_failed = true;
975 break;
976 case WLAN_EID_MESH_ID:
977 elems->mesh_id = pos;
978 elems->mesh_id_len = elen;
979 break;
980 case WLAN_EID_MESH_CONFIG:
981 if (elen >= sizeof(struct ieee80211_meshconf_ie))
982 elems->mesh_config = (void *)pos;
983 else
984 elem_parse_failed = true;
985 break;
986 case WLAN_EID_PEER_MGMT:
987 elems->peering = pos;
988 elems->peering_len = elen;
989 break;
990 case WLAN_EID_MESH_AWAKE_WINDOW:
991 if (elen >= 2)
992 elems->awake_window = (void *)pos;
993 break;
994 case WLAN_EID_PREQ:
995 elems->preq = pos;
996 elems->preq_len = elen;
997 break;
998 case WLAN_EID_PREP:
999 elems->prep = pos;
1000 elems->prep_len = elen;
1001 break;
1002 case WLAN_EID_PERR:
1003 elems->perr = pos;
1004 elems->perr_len = elen;
1005 break;
1006 case WLAN_EID_RANN:
1007 if (elen >= sizeof(struct ieee80211_rann_ie))
1008 elems->rann = (void *)pos;
1009 else
1010 elem_parse_failed = true;
1011 break;
1012 case WLAN_EID_CHANNEL_SWITCH:
1013 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1014 elem_parse_failed = true;
1015 break;
1016 }
1017 elems->ch_switch_ie = (void *)pos;
1018 break;
1019 case WLAN_EID_EXT_CHANSWITCH_ANN:
1020 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1021 elem_parse_failed = true;
1022 break;
1023 }
1024 elems->ext_chansw_ie = (void *)pos;
1025 break;
1026 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1027 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1028 elem_parse_failed = true;
1029 break;
1030 }
1031 elems->sec_chan_offs = (void *)pos;
1032 break;
1033 case WLAN_EID_CHAN_SWITCH_PARAM:
1034 if (elen !=
1035 sizeof(*elems->mesh_chansw_params_ie)) {
1036 elem_parse_failed = true;
1037 break;
1038 }
1039 elems->mesh_chansw_params_ie = (void *)pos;
1040 break;
1041 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1042 if (!action ||
1043 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1044 elem_parse_failed = true;
1045 break;
1046 }
1047 elems->wide_bw_chansw_ie = (void *)pos;
1048 break;
1049 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1050 if (action) {
1051 elem_parse_failed = true;
1052 break;
1053 }
1054 /*
1055 * This is a bit tricky, but as we only care about
1056 * the wide bandwidth channel switch element, so
1057 * just parse it out manually.
1058 */
1059 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1060 pos, elen);
1061 if (ie) {
1062 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1063 elems->wide_bw_chansw_ie =
1064 (void *)(ie + 2);
1065 else
1066 elem_parse_failed = true;
1067 }
1068 break;
1069 case WLAN_EID_COUNTRY:
1070 elems->country_elem = pos;
1071 elems->country_elem_len = elen;
1072 break;
1073 case WLAN_EID_PWR_CONSTRAINT:
1074 if (elen != 1) {
1075 elem_parse_failed = true;
1076 break;
1077 }
1078 elems->pwr_constr_elem = pos;
1079 break;
1080 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1081 /* Lots of different options exist, but we only care
1082 * about the Dynamic Transmit Power Control element.
1083 * First check for the Cisco OUI, then for the DTPC
1084 * tag (0x00).
1085 */
1086 if (elen < 4) {
1087 elem_parse_failed = true;
1088 break;
1089 }
1090
1091 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1092 pos[2] != 0x96 || pos[3] != 0x00)
1093 break;
1094
1095 if (elen != 6) {
1096 elem_parse_failed = true;
1097 break;
1098 }
1099
1100 if (calc_crc)
1101 crc = crc32_be(crc, pos - 2, elen + 2);
1102
1103 elems->cisco_dtpc_elem = pos;
1104 break;
1105 case WLAN_EID_TIMEOUT_INTERVAL:
1106 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1107 elems->timeout_int = (void *)pos;
1108 else
1109 elem_parse_failed = true;
1110 break;
1111 default:
1112 break;
1113 }
1114
1115 if (elem_parse_failed)
1116 elems->parse_error = true;
1117 else
1118 __set_bit(id, seen_elems);
1119
1120 left -= elen;
1121 pos += elen;
1122 }
1123
1124 if (left != 0)
1125 elems->parse_error = true;
1126
1127 return crc;
1128}
1129
1130void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1131 bool bss_notify)
1132{
1133 struct ieee80211_local *local = sdata->local;
1134 struct ieee80211_tx_queue_params qparam;
1135 struct ieee80211_chanctx_conf *chanctx_conf;
1136 int ac;
1137 bool use_11b, enable_qos;
1138 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1139 int aCWmin, aCWmax;
1140
1141 if (!local->ops->conf_tx)
1142 return;
1143
1144 if (local->hw.queues < IEEE80211_NUM_ACS)
1145 return;
1146
1147 memset(&qparam, 0, sizeof(qparam));
1148
1149 rcu_read_lock();
1150 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1151 use_11b = (chanctx_conf &&
1152 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1153 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1154 rcu_read_unlock();
1155
1156 /*
1157 * By default disable QoS in STA mode for old access points, which do
1158 * not support 802.11e. New APs will provide proper queue parameters,
1159 * that we will configure later.
1160 */
1161 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1162
1163 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1164
1165 /* Set defaults according to 802.11-2007 Table 7-37 */
1166 aCWmax = 1023;
1167 if (use_11b)
1168 aCWmin = 31;
1169 else
1170 aCWmin = 15;
1171
1172 /* Confiure old 802.11b/g medium access rules. */
1173 qparam.cw_max = aCWmax;
1174 qparam.cw_min = aCWmin;
1175 qparam.txop = 0;
1176 qparam.aifs = 2;
1177
1178 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1179 /* Update if QoS is enabled. */
1180 if (enable_qos) {
1181 switch (ac) {
1182 case IEEE80211_AC_BK:
1183 qparam.cw_max = aCWmax;
1184 qparam.cw_min = aCWmin;
1185 qparam.txop = 0;
1186 if (is_ocb)
1187 qparam.aifs = 9;
1188 else
1189 qparam.aifs = 7;
1190 break;
1191 /* never happens but let's not leave undefined */
1192 default:
1193 case IEEE80211_AC_BE:
1194 qparam.cw_max = aCWmax;
1195 qparam.cw_min = aCWmin;
1196 qparam.txop = 0;
1197 if (is_ocb)
1198 qparam.aifs = 6;
1199 else
1200 qparam.aifs = 3;
1201 break;
1202 case IEEE80211_AC_VI:
1203 qparam.cw_max = aCWmin;
1204 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1205 if (is_ocb)
1206 qparam.txop = 0;
1207 else if (use_11b)
1208 qparam.txop = 6016/32;
1209 else
1210 qparam.txop = 3008/32;
1211
1212 if (is_ocb)
1213 qparam.aifs = 3;
1214 else
1215 qparam.aifs = 2;
1216 break;
1217 case IEEE80211_AC_VO:
1218 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1219 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1220 if (is_ocb)
1221 qparam.txop = 0;
1222 else if (use_11b)
1223 qparam.txop = 3264/32;
1224 else
1225 qparam.txop = 1504/32;
1226 qparam.aifs = 2;
1227 break;
1228 }
1229 }
1230
1231 qparam.uapsd = false;
1232
1233 sdata->tx_conf[ac] = qparam;
1234 drv_conf_tx(local, sdata, ac, &qparam);
1235 }
1236
1237 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1238 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1239 sdata->vif.bss_conf.qos = enable_qos;
1240 if (bss_notify)
1241 ieee80211_bss_info_change_notify(sdata,
1242 BSS_CHANGED_QOS);
1243 }
1244}
1245
1246void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1247 u16 transaction, u16 auth_alg, u16 status,
1248 const u8 *extra, size_t extra_len, const u8 *da,
1249 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1250 u32 tx_flags)
1251{
1252 struct ieee80211_local *local = sdata->local;
1253 struct sk_buff *skb;
1254 struct ieee80211_mgmt *mgmt;
1255 int err;
1256
1257 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1258 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1259 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1260 if (!skb)
1261 return;
1262
1263 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1264
1265 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1266 memset(mgmt, 0, 24 + 6);
1267 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1268 IEEE80211_STYPE_AUTH);
1269 memcpy(mgmt->da, da, ETH_ALEN);
1270 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1271 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1272 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1273 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1274 mgmt->u.auth.status_code = cpu_to_le16(status);
1275 if (extra)
1276 memcpy(skb_put(skb, extra_len), extra, extra_len);
1277
1278 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1279 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1280 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1281 WARN_ON(err);
1282 }
1283
1284 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1285 tx_flags;
1286 ieee80211_tx_skb(sdata, skb);
1287}
1288
1289void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1290 const u8 *bssid, u16 stype, u16 reason,
1291 bool send_frame, u8 *frame_buf)
1292{
1293 struct ieee80211_local *local = sdata->local;
1294 struct sk_buff *skb;
1295 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1296
1297 /* build frame */
1298 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1299 mgmt->duration = 0; /* initialize only */
1300 mgmt->seq_ctrl = 0; /* initialize only */
1301 memcpy(mgmt->da, bssid, ETH_ALEN);
1302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1303 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1304 /* u.deauth.reason_code == u.disassoc.reason_code */
1305 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1306
1307 if (send_frame) {
1308 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1309 IEEE80211_DEAUTH_FRAME_LEN);
1310 if (!skb)
1311 return;
1312
1313 skb_reserve(skb, local->hw.extra_tx_headroom);
1314
1315 /* copy in frame */
1316 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1317 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1318
1319 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1320 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1321 IEEE80211_SKB_CB(skb)->flags |=
1322 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1323
1324 ieee80211_tx_skb(sdata, skb);
1325 }
1326}
1327
1328static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1329 u8 *buffer, size_t buffer_len,
1330 const u8 *ie, size_t ie_len,
1331 enum ieee80211_band band,
1332 u32 rate_mask,
1333 struct cfg80211_chan_def *chandef,
1334 size_t *offset)
1335{
1336 struct ieee80211_supported_band *sband;
1337 u8 *pos = buffer, *end = buffer + buffer_len;
1338 size_t noffset;
1339 int supp_rates_len, i;
1340 u8 rates[32];
1341 int num_rates;
1342 int ext_rates_len;
1343 int shift;
1344 u32 rate_flags;
1345 bool have_80mhz = false;
1346
1347 *offset = 0;
1348
1349 sband = local->hw.wiphy->bands[band];
1350 if (WARN_ON_ONCE(!sband))
1351 return 0;
1352
1353 rate_flags = ieee80211_chandef_rate_flags(chandef);
1354 shift = ieee80211_chandef_get_shift(chandef);
1355
1356 num_rates = 0;
1357 for (i = 0; i < sband->n_bitrates; i++) {
1358 if ((BIT(i) & rate_mask) == 0)
1359 continue; /* skip rate */
1360 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1361 continue;
1362
1363 rates[num_rates++] =
1364 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1365 (1 << shift) * 5);
1366 }
1367
1368 supp_rates_len = min_t(int, num_rates, 8);
1369
1370 if (end - pos < 2 + supp_rates_len)
1371 goto out_err;
1372 *pos++ = WLAN_EID_SUPP_RATES;
1373 *pos++ = supp_rates_len;
1374 memcpy(pos, rates, supp_rates_len);
1375 pos += supp_rates_len;
1376
1377 /* insert "request information" if in custom IEs */
1378 if (ie && ie_len) {
1379 static const u8 before_extrates[] = {
1380 WLAN_EID_SSID,
1381 WLAN_EID_SUPP_RATES,
1382 WLAN_EID_REQUEST,
1383 };
1384 noffset = ieee80211_ie_split(ie, ie_len,
1385 before_extrates,
1386 ARRAY_SIZE(before_extrates),
1387 *offset);
1388 if (end - pos < noffset - *offset)
1389 goto out_err;
1390 memcpy(pos, ie + *offset, noffset - *offset);
1391 pos += noffset - *offset;
1392 *offset = noffset;
1393 }
1394
1395 ext_rates_len = num_rates - supp_rates_len;
1396 if (ext_rates_len > 0) {
1397 if (end - pos < 2 + ext_rates_len)
1398 goto out_err;
1399 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1400 *pos++ = ext_rates_len;
1401 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1402 pos += ext_rates_len;
1403 }
1404
1405 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1406 if (end - pos < 3)
1407 goto out_err;
1408 *pos++ = WLAN_EID_DS_PARAMS;
1409 *pos++ = 1;
1410 *pos++ = ieee80211_frequency_to_channel(
1411 chandef->chan->center_freq);
1412 }
1413
1414 /* insert custom IEs that go before HT */
1415 if (ie && ie_len) {
1416 static const u8 before_ht[] = {
1417 WLAN_EID_SSID,
1418 WLAN_EID_SUPP_RATES,
1419 WLAN_EID_REQUEST,
1420 WLAN_EID_EXT_SUPP_RATES,
1421 WLAN_EID_DS_PARAMS,
1422 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1423 };
1424 noffset = ieee80211_ie_split(ie, ie_len,
1425 before_ht, ARRAY_SIZE(before_ht),
1426 *offset);
1427 if (end - pos < noffset - *offset)
1428 goto out_err;
1429 memcpy(pos, ie + *offset, noffset - *offset);
1430 pos += noffset - *offset;
1431 *offset = noffset;
1432 }
1433
1434 if (sband->ht_cap.ht_supported) {
1435 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1436 goto out_err;
1437 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1438 sband->ht_cap.cap);
1439 }
1440
1441 /*
1442 * If adding more here, adjust code in main.c
1443 * that calculates local->scan_ies_len.
1444 */
1445
1446 /* insert custom IEs that go before VHT */
1447 if (ie && ie_len) {
1448 static const u8 before_vht[] = {
1449 WLAN_EID_SSID,
1450 WLAN_EID_SUPP_RATES,
1451 WLAN_EID_REQUEST,
1452 WLAN_EID_EXT_SUPP_RATES,
1453 WLAN_EID_DS_PARAMS,
1454 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1455 WLAN_EID_HT_CAPABILITY,
1456 WLAN_EID_BSS_COEX_2040,
1457 WLAN_EID_EXT_CAPABILITY,
1458 WLAN_EID_SSID_LIST,
1459 WLAN_EID_CHANNEL_USAGE,
1460 WLAN_EID_INTERWORKING,
1461 /* mesh ID can't happen here */
1462 /* 60 GHz can't happen here right now */
1463 };
1464 noffset = ieee80211_ie_split(ie, ie_len,
1465 before_vht, ARRAY_SIZE(before_vht),
1466 *offset);
1467 if (end - pos < noffset - *offset)
1468 goto out_err;
1469 memcpy(pos, ie + *offset, noffset - *offset);
1470 pos += noffset - *offset;
1471 *offset = noffset;
1472 }
1473
1474 /* Check if any channel in this sband supports at least 80 MHz */
1475 for (i = 0; i < sband->n_channels; i++) {
1476 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1477 IEEE80211_CHAN_NO_80MHZ))
1478 continue;
1479
1480 have_80mhz = true;
1481 break;
1482 }
1483
1484 if (sband->vht_cap.vht_supported && have_80mhz) {
1485 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1486 goto out_err;
1487 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1488 sband->vht_cap.cap);
1489 }
1490
1491 return pos - buffer;
1492 out_err:
1493 WARN_ONCE(1, "not enough space for preq IEs\n");
1494 return pos - buffer;
1495}
1496
1497int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1498 size_t buffer_len,
1499 struct ieee80211_scan_ies *ie_desc,
1500 const u8 *ie, size_t ie_len,
1501 u8 bands_used, u32 *rate_masks,
1502 struct cfg80211_chan_def *chandef)
1503{
1504 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1505 int i;
1506
1507 memset(ie_desc, 0, sizeof(*ie_desc));
1508
1509 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1510 if (bands_used & BIT(i)) {
1511 pos += ieee80211_build_preq_ies_band(local,
1512 buffer + pos,
1513 buffer_len - pos,
1514 ie, ie_len, i,
1515 rate_masks[i],
1516 chandef,
1517 &custom_ie_offset);
1518 ie_desc->ies[i] = buffer + old_pos;
1519 ie_desc->len[i] = pos - old_pos;
1520 old_pos = pos;
1521 }
1522 }
1523
1524 /* add any remaining custom IEs */
1525 if (ie && ie_len) {
1526 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1527 "not enough space for preq custom IEs\n"))
1528 return pos;
1529 memcpy(buffer + pos, ie + custom_ie_offset,
1530 ie_len - custom_ie_offset);
1531 ie_desc->common_ies = buffer + pos;
1532 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1533 pos += ie_len - custom_ie_offset;
1534 }
1535
1536 return pos;
1537};
1538
1539struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1540 const u8 *src, const u8 *dst,
1541 u32 ratemask,
1542 struct ieee80211_channel *chan,
1543 const u8 *ssid, size_t ssid_len,
1544 const u8 *ie, size_t ie_len,
1545 bool directed)
1546{
1547 struct ieee80211_local *local = sdata->local;
1548 struct cfg80211_chan_def chandef;
1549 struct sk_buff *skb;
1550 struct ieee80211_mgmt *mgmt;
1551 int ies_len;
1552 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1553 struct ieee80211_scan_ies dummy_ie_desc;
1554
1555 /*
1556 * Do not send DS Channel parameter for directed probe requests
1557 * in order to maximize the chance that we get a response. Some
1558 * badly-behaved APs don't respond when this parameter is included.
1559 */
1560 chandef.width = sdata->vif.bss_conf.chandef.width;
1561 if (directed)
1562 chandef.chan = NULL;
1563 else
1564 chandef.chan = chan;
1565
1566 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1567 100 + ie_len);
1568 if (!skb)
1569 return NULL;
1570
1571 rate_masks[chan->band] = ratemask;
1572 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1573 skb_tailroom(skb), &dummy_ie_desc,
1574 ie, ie_len, BIT(chan->band),
1575 rate_masks, &chandef);
1576 skb_put(skb, ies_len);
1577
1578 if (dst) {
1579 mgmt = (struct ieee80211_mgmt *) skb->data;
1580 memcpy(mgmt->da, dst, ETH_ALEN);
1581 memcpy(mgmt->bssid, dst, ETH_ALEN);
1582 }
1583
1584 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1585
1586 return skb;
1587}
1588
1589void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1590 const u8 *src, const u8 *dst,
1591 const u8 *ssid, size_t ssid_len,
1592 const u8 *ie, size_t ie_len,
1593 u32 ratemask, bool directed, u32 tx_flags,
1594 struct ieee80211_channel *channel, bool scan)
1595{
1596 struct sk_buff *skb;
1597
1598 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1599 ssid, ssid_len,
1600 ie, ie_len, directed);
1601 if (skb) {
1602 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1603 if (scan)
1604 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1605 else
1606 ieee80211_tx_skb(sdata, skb);
1607 }
1608}
1609
1610u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1611 struct ieee802_11_elems *elems,
1612 enum ieee80211_band band, u32 *basic_rates)
1613{
1614 struct ieee80211_supported_band *sband;
1615 size_t num_rates;
1616 u32 supp_rates, rate_flags;
1617 int i, j, shift;
1618 sband = sdata->local->hw.wiphy->bands[band];
1619
1620 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1621 shift = ieee80211_vif_get_shift(&sdata->vif);
1622
1623 if (WARN_ON(!sband))
1624 return 1;
1625
1626 num_rates = sband->n_bitrates;
1627 supp_rates = 0;
1628 for (i = 0; i < elems->supp_rates_len +
1629 elems->ext_supp_rates_len; i++) {
1630 u8 rate = 0;
1631 int own_rate;
1632 bool is_basic;
1633 if (i < elems->supp_rates_len)
1634 rate = elems->supp_rates[i];
1635 else if (elems->ext_supp_rates)
1636 rate = elems->ext_supp_rates
1637 [i - elems->supp_rates_len];
1638 own_rate = 5 * (rate & 0x7f);
1639 is_basic = !!(rate & 0x80);
1640
1641 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1642 continue;
1643
1644 for (j = 0; j < num_rates; j++) {
1645 int brate;
1646 if ((rate_flags & sband->bitrates[j].flags)
1647 != rate_flags)
1648 continue;
1649
1650 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1651 1 << shift);
1652
1653 if (brate == own_rate) {
1654 supp_rates |= BIT(j);
1655 if (basic_rates && is_basic)
1656 *basic_rates |= BIT(j);
1657 }
1658 }
1659 }
1660 return supp_rates;
1661}
1662
1663void ieee80211_stop_device(struct ieee80211_local *local)
1664{
1665 ieee80211_led_radio(local, false);
1666 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1667
1668 cancel_work_sync(&local->reconfig_filter);
1669
1670 flush_workqueue(local->workqueue);
1671 drv_stop(local);
1672}
1673
1674static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1675{
1676 struct ieee80211_sub_if_data *sdata;
1677 struct ieee80211_chanctx *ctx;
1678
1679 /*
1680 * We get here if during resume the device can't be restarted properly.
1681 * We might also get here if this happens during HW reset, which is a
1682 * slightly different situation and we need to drop all connections in
1683 * the latter case.
1684 *
1685 * Ask cfg80211 to turn off all interfaces, this will result in more
1686 * warnings but at least we'll then get into a clean stopped state.
1687 */
1688
1689 local->resuming = false;
1690 local->suspended = false;
1691 local->started = false;
1692
1693 /* scheduled scan clearly can't be running any more, but tell
1694 * cfg80211 and clear local state
1695 */
1696 ieee80211_sched_scan_end(local);
1697
1698 list_for_each_entry(sdata, &local->interfaces, list)
1699 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1700
1701 /* Mark channel contexts as not being in the driver any more to avoid
1702 * removing them from the driver during the shutdown process...
1703 */
1704 mutex_lock(&local->chanctx_mtx);
1705 list_for_each_entry(ctx, &local->chanctx_list, list)
1706 ctx->driver_present = false;
1707 mutex_unlock(&local->chanctx_mtx);
1708
1709 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1710}
1711
1712static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1713 struct ieee80211_sub_if_data *sdata)
1714{
1715 struct ieee80211_chanctx_conf *conf;
1716 struct ieee80211_chanctx *ctx;
1717
1718 if (!local->use_chanctx)
1719 return;
1720
1721 mutex_lock(&local->chanctx_mtx);
1722 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1723 lockdep_is_held(&local->chanctx_mtx));
1724 if (conf) {
1725 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1726 drv_assign_vif_chanctx(local, sdata, ctx);
1727 }
1728 mutex_unlock(&local->chanctx_mtx);
1729}
1730
1731int ieee80211_reconfig(struct ieee80211_local *local)
1732{
1733 struct ieee80211_hw *hw = &local->hw;
1734 struct ieee80211_sub_if_data *sdata;
1735 struct ieee80211_chanctx *ctx;
1736 struct sta_info *sta;
1737 int res, i;
1738 bool reconfig_due_to_wowlan = false;
1739 struct ieee80211_sub_if_data *sched_scan_sdata;
1740 struct cfg80211_sched_scan_request *sched_scan_req;
1741 bool sched_scan_stopped = false;
1742
1743 /* nothing to do if HW shouldn't run */
1744 if (!local->open_count)
1745 goto wake_up;
1746
1747#ifdef CONFIG_PM
1748 if (local->suspended)
1749 local->resuming = true;
1750
1751 if (local->wowlan) {
1752 res = drv_resume(local);
1753 local->wowlan = false;
1754 if (res < 0) {
1755 local->resuming = false;
1756 return res;
1757 }
1758 if (res == 0)
1759 goto wake_up;
1760 WARN_ON(res > 1);
1761 /*
1762 * res is 1, which means the driver requested
1763 * to go through a regular reset on wakeup.
1764 */
1765 reconfig_due_to_wowlan = true;
1766 }
1767#endif
1768
1769 /*
1770 * Upon resume hardware can sometimes be goofy due to
1771 * various platform / driver / bus issues, so restarting
1772 * the device may at times not work immediately. Propagate
1773 * the error.
1774 */
1775 res = drv_start(local);
1776 if (res) {
1777 if (local->suspended)
1778 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1779 else
1780 WARN(1, "Hardware became unavailable during restart.\n");
1781 ieee80211_handle_reconfig_failure(local);
1782 return res;
1783 }
1784
1785 /* setup fragmentation threshold */
1786 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1787
1788 /* setup RTS threshold */
1789 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1790
1791 /* reset coverage class */
1792 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1793
1794 ieee80211_led_radio(local, true);
1795 ieee80211_mod_tpt_led_trig(local,
1796 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1797
1798 /* add interfaces */
1799 sdata = rtnl_dereference(local->monitor_sdata);
1800 if (sdata) {
1801 /* in HW restart it exists already */
1802 WARN_ON(local->resuming);
1803 res = drv_add_interface(local, sdata);
1804 if (WARN_ON(res)) {
1805 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1806 synchronize_net();
1807 kfree(sdata);
1808 }
1809 }
1810
1811 list_for_each_entry(sdata, &local->interfaces, list) {
1812 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1813 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1814 ieee80211_sdata_running(sdata))
1815 res = drv_add_interface(local, sdata);
1816 }
1817
1818 /* add channel contexts */
1819 if (local->use_chanctx) {
1820 mutex_lock(&local->chanctx_mtx);
1821 list_for_each_entry(ctx, &local->chanctx_list, list)
1822 if (ctx->replace_state !=
1823 IEEE80211_CHANCTX_REPLACES_OTHER)
1824 WARN_ON(drv_add_chanctx(local, ctx));
1825 mutex_unlock(&local->chanctx_mtx);
1826
1827 list_for_each_entry(sdata, &local->interfaces, list) {
1828 if (!ieee80211_sdata_running(sdata))
1829 continue;
1830 ieee80211_assign_chanctx(local, sdata);
1831 }
1832
1833 sdata = rtnl_dereference(local->monitor_sdata);
1834 if (sdata && ieee80211_sdata_running(sdata))
1835 ieee80211_assign_chanctx(local, sdata);
1836 }
1837
1838 /* add STAs back */
1839 mutex_lock(&local->sta_mtx);
1840 list_for_each_entry(sta, &local->sta_list, list) {
1841 enum ieee80211_sta_state state;
1842
1843 if (!sta->uploaded)
1844 continue;
1845
1846 /* AP-mode stations will be added later */
1847 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1848 continue;
1849
1850 for (state = IEEE80211_STA_NOTEXIST;
1851 state < sta->sta_state; state++)
1852 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1853 state + 1));
1854 }
1855 mutex_unlock(&local->sta_mtx);
1856
1857 /* reconfigure tx conf */
1858 if (hw->queues >= IEEE80211_NUM_ACS) {
1859 list_for_each_entry(sdata, &local->interfaces, list) {
1860 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1861 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1862 !ieee80211_sdata_running(sdata))
1863 continue;
1864
1865 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1866 drv_conf_tx(local, sdata, i,
1867 &sdata->tx_conf[i]);
1868 }
1869 }
1870
1871 /* reconfigure hardware */
1872 ieee80211_hw_config(local, ~0);
1873
1874 ieee80211_configure_filter(local);
1875
1876 /* Finally also reconfigure all the BSS information */
1877 list_for_each_entry(sdata, &local->interfaces, list) {
1878 u32 changed;
1879
1880 if (!ieee80211_sdata_running(sdata))
1881 continue;
1882
1883 /* common change flags for all interface types */
1884 changed = BSS_CHANGED_ERP_CTS_PROT |
1885 BSS_CHANGED_ERP_PREAMBLE |
1886 BSS_CHANGED_ERP_SLOT |
1887 BSS_CHANGED_HT |
1888 BSS_CHANGED_BASIC_RATES |
1889 BSS_CHANGED_BEACON_INT |
1890 BSS_CHANGED_BSSID |
1891 BSS_CHANGED_CQM |
1892 BSS_CHANGED_QOS |
1893 BSS_CHANGED_IDLE |
1894 BSS_CHANGED_TXPOWER;
1895
1896 switch (sdata->vif.type) {
1897 case NL80211_IFTYPE_STATION:
1898 changed |= BSS_CHANGED_ASSOC |
1899 BSS_CHANGED_ARP_FILTER |
1900 BSS_CHANGED_PS;
1901
1902 /* Re-send beacon info report to the driver */
1903 if (sdata->u.mgd.have_beacon)
1904 changed |= BSS_CHANGED_BEACON_INFO;
1905
1906 sdata_lock(sdata);
1907 ieee80211_bss_info_change_notify(sdata, changed);
1908 sdata_unlock(sdata);
1909 break;
1910 case NL80211_IFTYPE_OCB:
1911 changed |= BSS_CHANGED_OCB;
1912 ieee80211_bss_info_change_notify(sdata, changed);
1913 break;
1914 case NL80211_IFTYPE_ADHOC:
1915 changed |= BSS_CHANGED_IBSS;
1916 /* fall through */
1917 case NL80211_IFTYPE_AP:
1918 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1919
1920 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1921 changed |= BSS_CHANGED_AP_PROBE_RESP;
1922
1923 if (rcu_access_pointer(sdata->u.ap.beacon))
1924 drv_start_ap(local, sdata);
1925 }
1926
1927 /* fall through */
1928 case NL80211_IFTYPE_MESH_POINT:
1929 if (sdata->vif.bss_conf.enable_beacon) {
1930 changed |= BSS_CHANGED_BEACON |
1931 BSS_CHANGED_BEACON_ENABLED;
1932 ieee80211_bss_info_change_notify(sdata, changed);
1933 }
1934 break;
1935 case NL80211_IFTYPE_WDS:
1936 case NL80211_IFTYPE_AP_VLAN:
1937 case NL80211_IFTYPE_MONITOR:
1938 case NL80211_IFTYPE_P2P_DEVICE:
1939 /* nothing to do */
1940 break;
1941 case NL80211_IFTYPE_UNSPECIFIED:
1942 case NUM_NL80211_IFTYPES:
1943 case NL80211_IFTYPE_P2P_CLIENT:
1944 case NL80211_IFTYPE_P2P_GO:
1945 WARN_ON(1);
1946 break;
1947 }
1948 }
1949
1950 ieee80211_recalc_ps(local, -1);
1951
1952 /*
1953 * The sta might be in psm against the ap (e.g. because
1954 * this was the state before a hw restart), so we
1955 * explicitly send a null packet in order to make sure
1956 * it'll sync against the ap (and get out of psm).
1957 */
1958 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1959 list_for_each_entry(sdata, &local->interfaces, list) {
1960 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1961 continue;
1962 if (!sdata->u.mgd.associated)
1963 continue;
1964
1965 ieee80211_send_nullfunc(local, sdata, 0);
1966 }
1967 }
1968
1969 /* APs are now beaconing, add back stations */
1970 mutex_lock(&local->sta_mtx);
1971 list_for_each_entry(sta, &local->sta_list, list) {
1972 enum ieee80211_sta_state state;
1973
1974 if (!sta->uploaded)
1975 continue;
1976
1977 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1978 continue;
1979
1980 for (state = IEEE80211_STA_NOTEXIST;
1981 state < sta->sta_state; state++)
1982 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1983 state + 1));
1984 }
1985 mutex_unlock(&local->sta_mtx);
1986
1987 /* add back keys */
1988 list_for_each_entry(sdata, &local->interfaces, list)
1989 if (ieee80211_sdata_running(sdata))
1990 ieee80211_enable_keys(sdata);
1991
1992 wake_up:
1993 local->in_reconfig = false;
1994 barrier();
1995
1996 if (local->monitors == local->open_count && local->monitors > 0)
1997 ieee80211_add_virtual_monitor(local);
1998
1999 /*
2000 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2001 * sessions can be established after a resume.
2002 *
2003 * Also tear down aggregation sessions since reconfiguring
2004 * them in a hardware restart scenario is not easily done
2005 * right now, and the hardware will have lost information
2006 * about the sessions, but we and the AP still think they
2007 * are active. This is really a workaround though.
2008 */
2009 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2010 mutex_lock(&local->sta_mtx);
2011
2012 list_for_each_entry(sta, &local->sta_list, list) {
2013 ieee80211_sta_tear_down_BA_sessions(
2014 sta, AGG_STOP_LOCAL_REQUEST);
2015 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2016 }
2017
2018 mutex_unlock(&local->sta_mtx);
2019 }
2020
2021 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2022 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2023 false);
2024
2025 /*
2026 * Reconfigure sched scan if it was interrupted by FW restart or
2027 * suspend.
2028 */
2029 mutex_lock(&local->mtx);
2030 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2031 lockdep_is_held(&local->mtx));
2032 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2033 lockdep_is_held(&local->mtx));
2034 if (sched_scan_sdata && sched_scan_req)
2035 /*
2036 * Sched scan stopped, but we don't want to report it. Instead,
2037 * we're trying to reschedule.
2038 */
2039 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2040 sched_scan_req))
2041 sched_scan_stopped = true;
2042 mutex_unlock(&local->mtx);
2043
2044 if (sched_scan_stopped)
2045 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2046
2047 /*
2048 * If this is for hw restart things are still running.
2049 * We may want to change that later, however.
2050 */
2051 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2052 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2053
2054 if (!local->suspended)
2055 return 0;
2056
2057#ifdef CONFIG_PM
2058 /* first set suspended false, then resuming */
2059 local->suspended = false;
2060 mb();
2061 local->resuming = false;
2062
2063 /* It's possible that we don't handle the scan completion in
2064 * time during suspend, so if it's still marked as completed
2065 * here, queue the work and flush it to clean things up.
2066 * Instead of calling the worker function directly here, we
2067 * really queue it to avoid potential races with other flows
2068 * scheduling the same work.
2069 */
2070 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2071 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2072 flush_delayed_work(&local->scan_work);
2073 }
2074
2075 if (local->open_count && !reconfig_due_to_wowlan)
2076 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2077
2078 list_for_each_entry(sdata, &local->interfaces, list) {
2079 if (!ieee80211_sdata_running(sdata))
2080 continue;
2081 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2082 ieee80211_sta_restart(sdata);
2083 }
2084
2085 mod_timer(&local->sta_cleanup, jiffies + 1);
2086#else
2087 WARN_ON(1);
2088#endif
2089
2090 return 0;
2091}
2092
2093void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2094{
2095 struct ieee80211_sub_if_data *sdata;
2096 struct ieee80211_local *local;
2097 struct ieee80211_key *key;
2098
2099 if (WARN_ON(!vif))
2100 return;
2101
2102 sdata = vif_to_sdata(vif);
2103 local = sdata->local;
2104
2105 if (WARN_ON(!local->resuming))
2106 return;
2107
2108 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2109 return;
2110
2111 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2112
2113 mutex_lock(&local->key_mtx);
2114 list_for_each_entry(key, &sdata->key_list, list)
2115 key->flags |= KEY_FLAG_TAINTED;
2116 mutex_unlock(&local->key_mtx);
2117}
2118EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2119
2120void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2121{
2122 struct ieee80211_local *local = sdata->local;
2123 struct ieee80211_chanctx_conf *chanctx_conf;
2124 struct ieee80211_chanctx *chanctx;
2125
2126 mutex_lock(&local->chanctx_mtx);
2127
2128 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2129 lockdep_is_held(&local->chanctx_mtx));
2130
2131 if (WARN_ON_ONCE(!chanctx_conf))
2132 goto unlock;
2133
2134 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2135 ieee80211_recalc_smps_chanctx(local, chanctx);
2136 unlock:
2137 mutex_unlock(&local->chanctx_mtx);
2138}
2139
2140void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2141{
2142 struct ieee80211_local *local = sdata->local;
2143 struct ieee80211_chanctx_conf *chanctx_conf;
2144 struct ieee80211_chanctx *chanctx;
2145
2146 mutex_lock(&local->chanctx_mtx);
2147
2148 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2149 lockdep_is_held(&local->chanctx_mtx));
2150
2151 if (WARN_ON_ONCE(!chanctx_conf))
2152 goto unlock;
2153
2154 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2155 ieee80211_recalc_chanctx_min_def(local, chanctx);
2156 unlock:
2157 mutex_unlock(&local->chanctx_mtx);
2158}
2159
2160static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2161{
2162 int i;
2163
2164 for (i = 0; i < n_ids; i++)
2165 if (ids[i] == id)
2166 return true;
2167 return false;
2168}
2169
2170size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2171 const u8 *ids, int n_ids,
2172 const u8 *after_ric, int n_after_ric,
2173 size_t offset)
2174{
2175 size_t pos = offset;
2176
2177 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2178 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2179 pos += 2 + ies[pos + 1];
2180
2181 while (pos < ielen &&
2182 !ieee80211_id_in_list(after_ric, n_after_ric,
2183 ies[pos]))
2184 pos += 2 + ies[pos + 1];
2185 } else {
2186 pos += 2 + ies[pos + 1];
2187 }
2188 }
2189
2190 return pos;
2191}
2192
2193size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2194 const u8 *ids, int n_ids, size_t offset)
2195{
2196 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2197}
2198EXPORT_SYMBOL(ieee80211_ie_split);
2199
2200size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2201{
2202 size_t pos = offset;
2203
2204 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2205 pos += 2 + ies[pos + 1];
2206
2207 return pos;
2208}
2209
2210static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2211 int rssi_min_thold,
2212 int rssi_max_thold)
2213{
2214 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2215
2216 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2217 return;
2218
2219 /*
2220 * Scale up threshold values before storing it, as the RSSI averaging
2221 * algorithm uses a scaled up value as well. Change this scaling
2222 * factor if the RSSI averaging algorithm changes.
2223 */
2224 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2225 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2226}
2227
2228void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2229 int rssi_min_thold,
2230 int rssi_max_thold)
2231{
2232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2233
2234 WARN_ON(rssi_min_thold == rssi_max_thold ||
2235 rssi_min_thold > rssi_max_thold);
2236
2237 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2238 rssi_max_thold);
2239}
2240EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2241
2242void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2243{
2244 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2245
2246 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2247}
2248EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2249
2250u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2251 u16 cap)
2252{
2253 __le16 tmp;
2254
2255 *pos++ = WLAN_EID_HT_CAPABILITY;
2256 *pos++ = sizeof(struct ieee80211_ht_cap);
2257 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2258
2259 /* capability flags */
2260 tmp = cpu_to_le16(cap);
2261 memcpy(pos, &tmp, sizeof(u16));
2262 pos += sizeof(u16);
2263
2264 /* AMPDU parameters */
2265 *pos++ = ht_cap->ampdu_factor |
2266 (ht_cap->ampdu_density <<
2267 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2268
2269 /* MCS set */
2270 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2271 pos += sizeof(ht_cap->mcs);
2272
2273 /* extended capabilities */
2274 pos += sizeof(__le16);
2275
2276 /* BF capabilities */
2277 pos += sizeof(__le32);
2278
2279 /* antenna selection */
2280 pos += sizeof(u8);
2281
2282 return pos;
2283}
2284
2285u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2286 u32 cap)
2287{
2288 __le32 tmp;
2289
2290 *pos++ = WLAN_EID_VHT_CAPABILITY;
2291 *pos++ = sizeof(struct ieee80211_vht_cap);
2292 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2293
2294 /* capability flags */
2295 tmp = cpu_to_le32(cap);
2296 memcpy(pos, &tmp, sizeof(u32));
2297 pos += sizeof(u32);
2298
2299 /* VHT MCS set */
2300 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2301 pos += sizeof(vht_cap->vht_mcs);
2302
2303 return pos;
2304}
2305
2306u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2307 const struct cfg80211_chan_def *chandef,
2308 u16 prot_mode)
2309{
2310 struct ieee80211_ht_operation *ht_oper;
2311 /* Build HT Information */
2312 *pos++ = WLAN_EID_HT_OPERATION;
2313 *pos++ = sizeof(struct ieee80211_ht_operation);
2314 ht_oper = (struct ieee80211_ht_operation *)pos;
2315 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2316 chandef->chan->center_freq);
2317 switch (chandef->width) {
2318 case NL80211_CHAN_WIDTH_160:
2319 case NL80211_CHAN_WIDTH_80P80:
2320 case NL80211_CHAN_WIDTH_80:
2321 case NL80211_CHAN_WIDTH_40:
2322 if (chandef->center_freq1 > chandef->chan->center_freq)
2323 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2324 else
2325 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2326 break;
2327 default:
2328 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2329 break;
2330 }
2331 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2332 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2333 chandef->width != NL80211_CHAN_WIDTH_20)
2334 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2335
2336 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2337 ht_oper->stbc_param = 0x0000;
2338
2339 /* It seems that Basic MCS set and Supported MCS set
2340 are identical for the first 10 bytes */
2341 memset(&ht_oper->basic_set, 0, 16);
2342 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2343
2344 return pos + sizeof(struct ieee80211_ht_operation);
2345}
2346
2347u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2348 const struct cfg80211_chan_def *chandef)
2349{
2350 struct ieee80211_vht_operation *vht_oper;
2351
2352 *pos++ = WLAN_EID_VHT_OPERATION;
2353 *pos++ = sizeof(struct ieee80211_vht_operation);
2354 vht_oper = (struct ieee80211_vht_operation *)pos;
2355 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2356 chandef->center_freq1);
2357 if (chandef->center_freq2)
2358 vht_oper->center_freq_seg2_idx =
2359 ieee80211_frequency_to_channel(chandef->center_freq2);
2360
2361 switch (chandef->width) {
2362 case NL80211_CHAN_WIDTH_160:
2363 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2364 break;
2365 case NL80211_CHAN_WIDTH_80P80:
2366 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2367 break;
2368 case NL80211_CHAN_WIDTH_80:
2369 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2370 break;
2371 default:
2372 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2373 break;
2374 }
2375
2376 /* don't require special VHT peer rates */
2377 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2378
2379 return pos + sizeof(struct ieee80211_vht_operation);
2380}
2381
2382void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2383 const struct ieee80211_ht_operation *ht_oper,
2384 struct cfg80211_chan_def *chandef)
2385{
2386 enum nl80211_channel_type channel_type;
2387
2388 if (!ht_oper) {
2389 cfg80211_chandef_create(chandef, control_chan,
2390 NL80211_CHAN_NO_HT);
2391 return;
2392 }
2393
2394 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2395 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2396 channel_type = NL80211_CHAN_HT20;
2397 break;
2398 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2399 channel_type = NL80211_CHAN_HT40PLUS;
2400 break;
2401 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2402 channel_type = NL80211_CHAN_HT40MINUS;
2403 break;
2404 default:
2405 channel_type = NL80211_CHAN_NO_HT;
2406 }
2407
2408 cfg80211_chandef_create(chandef, control_chan, channel_type);
2409}
2410
2411int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2412 const struct ieee80211_supported_band *sband,
2413 const u8 *srates, int srates_len, u32 *rates)
2414{
2415 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2416 int shift = ieee80211_chandef_get_shift(chandef);
2417 struct ieee80211_rate *br;
2418 int brate, rate, i, j, count = 0;
2419
2420 *rates = 0;
2421
2422 for (i = 0; i < srates_len; i++) {
2423 rate = srates[i] & 0x7f;
2424
2425 for (j = 0; j < sband->n_bitrates; j++) {
2426 br = &sband->bitrates[j];
2427 if ((rate_flags & br->flags) != rate_flags)
2428 continue;
2429
2430 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2431 if (brate == rate) {
2432 *rates |= BIT(j);
2433 count++;
2434 break;
2435 }
2436 }
2437 }
2438 return count;
2439}
2440
2441int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2442 struct sk_buff *skb, bool need_basic,
2443 enum ieee80211_band band)
2444{
2445 struct ieee80211_local *local = sdata->local;
2446 struct ieee80211_supported_band *sband;
2447 int rate, shift;
2448 u8 i, rates, *pos;
2449 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2450 u32 rate_flags;
2451
2452 shift = ieee80211_vif_get_shift(&sdata->vif);
2453 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2454 sband = local->hw.wiphy->bands[band];
2455 rates = 0;
2456 for (i = 0; i < sband->n_bitrates; i++) {
2457 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2458 continue;
2459 rates++;
2460 }
2461 if (rates > 8)
2462 rates = 8;
2463
2464 if (skb_tailroom(skb) < rates + 2)
2465 return -ENOMEM;
2466
2467 pos = skb_put(skb, rates + 2);
2468 *pos++ = WLAN_EID_SUPP_RATES;
2469 *pos++ = rates;
2470 for (i = 0; i < rates; i++) {
2471 u8 basic = 0;
2472 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2473 continue;
2474
2475 if (need_basic && basic_rates & BIT(i))
2476 basic = 0x80;
2477 rate = sband->bitrates[i].bitrate;
2478 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2479 5 * (1 << shift));
2480 *pos++ = basic | (u8) rate;
2481 }
2482
2483 return 0;
2484}
2485
2486int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2487 struct sk_buff *skb, bool need_basic,
2488 enum ieee80211_band band)
2489{
2490 struct ieee80211_local *local = sdata->local;
2491 struct ieee80211_supported_band *sband;
2492 int rate, shift;
2493 u8 i, exrates, *pos;
2494 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2495 u32 rate_flags;
2496
2497 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2498 shift = ieee80211_vif_get_shift(&sdata->vif);
2499
2500 sband = local->hw.wiphy->bands[band];
2501 exrates = 0;
2502 for (i = 0; i < sband->n_bitrates; i++) {
2503 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2504 continue;
2505 exrates++;
2506 }
2507
2508 if (exrates > 8)
2509 exrates -= 8;
2510 else
2511 exrates = 0;
2512
2513 if (skb_tailroom(skb) < exrates + 2)
2514 return -ENOMEM;
2515
2516 if (exrates) {
2517 pos = skb_put(skb, exrates + 2);
2518 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2519 *pos++ = exrates;
2520 for (i = 8; i < sband->n_bitrates; i++) {
2521 u8 basic = 0;
2522 if ((rate_flags & sband->bitrates[i].flags)
2523 != rate_flags)
2524 continue;
2525 if (need_basic && basic_rates & BIT(i))
2526 basic = 0x80;
2527 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2528 5 * (1 << shift));
2529 *pos++ = basic | (u8) rate;
2530 }
2531 }
2532 return 0;
2533}
2534
2535int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2536{
2537 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2539
2540 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2541 /* non-managed type inferfaces */
2542 return 0;
2543 }
2544 return ifmgd->ave_beacon_signal / 16;
2545}
2546EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2547
2548u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2549{
2550 if (!mcs)
2551 return 1;
2552
2553 /* TODO: consider rx_highest */
2554
2555 if (mcs->rx_mask[3])
2556 return 4;
2557 if (mcs->rx_mask[2])
2558 return 3;
2559 if (mcs->rx_mask[1])
2560 return 2;
2561 return 1;
2562}
2563
2564/**
2565 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2566 * @local: mac80211 hw info struct
2567 * @status: RX status
2568 * @mpdu_len: total MPDU length (including FCS)
2569 * @mpdu_offset: offset into MPDU to calculate timestamp at
2570 *
2571 * This function calculates the RX timestamp at the given MPDU offset, taking
2572 * into account what the RX timestamp was. An offset of 0 will just normalize
2573 * the timestamp to TSF at beginning of MPDU reception.
2574 */
2575u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2576 struct ieee80211_rx_status *status,
2577 unsigned int mpdu_len,
2578 unsigned int mpdu_offset)
2579{
2580 u64 ts = status->mactime;
2581 struct rate_info ri;
2582 u16 rate;
2583
2584 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2585 return 0;
2586
2587 memset(&ri, 0, sizeof(ri));
2588
2589 /* Fill cfg80211 rate info */
2590 if (status->flag & RX_FLAG_HT) {
2591 ri.mcs = status->rate_idx;
2592 ri.flags |= RATE_INFO_FLAGS_MCS;
2593 if (status->flag & RX_FLAG_40MHZ)
2594 ri.bw = RATE_INFO_BW_40;
2595 else
2596 ri.bw = RATE_INFO_BW_20;
2597 if (status->flag & RX_FLAG_SHORT_GI)
2598 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2599 } else if (status->flag & RX_FLAG_VHT) {
2600 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2601 ri.mcs = status->rate_idx;
2602 ri.nss = status->vht_nss;
2603 if (status->flag & RX_FLAG_40MHZ)
2604 ri.bw = RATE_INFO_BW_40;
2605 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2606 ri.bw = RATE_INFO_BW_80;
2607 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2608 ri.bw = RATE_INFO_BW_160;
2609 else
2610 ri.bw = RATE_INFO_BW_20;
2611 if (status->flag & RX_FLAG_SHORT_GI)
2612 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2613 } else {
2614 struct ieee80211_supported_band *sband;
2615 int shift = 0;
2616 int bitrate;
2617
2618 if (status->flag & RX_FLAG_10MHZ) {
2619 shift = 1;
2620 ri.bw = RATE_INFO_BW_10;
2621 } else if (status->flag & RX_FLAG_5MHZ) {
2622 shift = 2;
2623 ri.bw = RATE_INFO_BW_5;
2624 } else {
2625 ri.bw = RATE_INFO_BW_20;
2626 }
2627
2628 sband = local->hw.wiphy->bands[status->band];
2629 bitrate = sband->bitrates[status->rate_idx].bitrate;
2630 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2631 }
2632
2633 rate = cfg80211_calculate_bitrate(&ri);
2634 if (WARN_ONCE(!rate,
2635 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2636 status->flag, status->rate_idx, status->vht_nss))
2637 return 0;
2638
2639 /* rewind from end of MPDU */
2640 if (status->flag & RX_FLAG_MACTIME_END)
2641 ts -= mpdu_len * 8 * 10 / rate;
2642
2643 ts += mpdu_offset * 8 * 10 / rate;
2644
2645 return ts;
2646}
2647
2648void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2649{
2650 struct ieee80211_sub_if_data *sdata;
2651 struct cfg80211_chan_def chandef;
2652
2653 mutex_lock(&local->mtx);
2654 mutex_lock(&local->iflist_mtx);
2655 list_for_each_entry(sdata, &local->interfaces, list) {
2656 /* it might be waiting for the local->mtx, but then
2657 * by the time it gets it, sdata->wdev.cac_started
2658 * will no longer be true
2659 */
2660 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2661
2662 if (sdata->wdev.cac_started) {
2663 chandef = sdata->vif.bss_conf.chandef;
2664 ieee80211_vif_release_channel(sdata);
2665 cfg80211_cac_event(sdata->dev,
2666 &chandef,
2667 NL80211_RADAR_CAC_ABORTED,
2668 GFP_KERNEL);
2669 }
2670 }
2671 mutex_unlock(&local->iflist_mtx);
2672 mutex_unlock(&local->mtx);
2673}
2674
2675void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2676{
2677 struct ieee80211_local *local =
2678 container_of(work, struct ieee80211_local, radar_detected_work);
2679 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2680 struct ieee80211_chanctx *ctx;
2681 int num_chanctx = 0;
2682
2683 mutex_lock(&local->chanctx_mtx);
2684 list_for_each_entry(ctx, &local->chanctx_list, list) {
2685 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2686 continue;
2687
2688 num_chanctx++;
2689 chandef = ctx->conf.def;
2690 }
2691 mutex_unlock(&local->chanctx_mtx);
2692
2693 ieee80211_dfs_cac_cancel(local);
2694
2695 if (num_chanctx > 1)
2696 /* XXX: multi-channel is not supported yet */
2697 WARN_ON(1);
2698 else
2699 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2700}
2701
2702void ieee80211_radar_detected(struct ieee80211_hw *hw)
2703{
2704 struct ieee80211_local *local = hw_to_local(hw);
2705
2706 trace_api_radar_detected(local);
2707
2708 ieee80211_queue_work(hw, &local->radar_detected_work);
2709}
2710EXPORT_SYMBOL(ieee80211_radar_detected);
2711
2712u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2713{
2714 u32 ret;
2715 int tmp;
2716
2717 switch (c->width) {
2718 case NL80211_CHAN_WIDTH_20:
2719 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2720 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2721 break;
2722 case NL80211_CHAN_WIDTH_40:
2723 c->width = NL80211_CHAN_WIDTH_20;
2724 c->center_freq1 = c->chan->center_freq;
2725 ret = IEEE80211_STA_DISABLE_40MHZ |
2726 IEEE80211_STA_DISABLE_VHT;
2727 break;
2728 case NL80211_CHAN_WIDTH_80:
2729 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2730 /* n_P40 */
2731 tmp /= 2;
2732 /* freq_P40 */
2733 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2734 c->width = NL80211_CHAN_WIDTH_40;
2735 ret = IEEE80211_STA_DISABLE_VHT;
2736 break;
2737 case NL80211_CHAN_WIDTH_80P80:
2738 c->center_freq2 = 0;
2739 c->width = NL80211_CHAN_WIDTH_80;
2740 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2741 IEEE80211_STA_DISABLE_160MHZ;
2742 break;
2743 case NL80211_CHAN_WIDTH_160:
2744 /* n_P20 */
2745 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2746 /* n_P80 */
2747 tmp /= 4;
2748 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2749 c->width = NL80211_CHAN_WIDTH_80;
2750 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2751 IEEE80211_STA_DISABLE_160MHZ;
2752 break;
2753 default:
2754 case NL80211_CHAN_WIDTH_20_NOHT:
2755 WARN_ON_ONCE(1);
2756 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2757 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2758 break;
2759 case NL80211_CHAN_WIDTH_5:
2760 case NL80211_CHAN_WIDTH_10:
2761 WARN_ON_ONCE(1);
2762 /* keep c->width */
2763 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2764 break;
2765 }
2766
2767 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2768
2769 return ret;
2770}
2771
2772/*
2773 * Returns true if smps_mode_new is strictly more restrictive than
2774 * smps_mode_old.
2775 */
2776bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2777 enum ieee80211_smps_mode smps_mode_new)
2778{
2779 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2780 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2781 return false;
2782
2783 switch (smps_mode_old) {
2784 case IEEE80211_SMPS_STATIC:
2785 return false;
2786 case IEEE80211_SMPS_DYNAMIC:
2787 return smps_mode_new == IEEE80211_SMPS_STATIC;
2788 case IEEE80211_SMPS_OFF:
2789 return smps_mode_new != IEEE80211_SMPS_OFF;
2790 default:
2791 WARN_ON(1);
2792 }
2793
2794 return false;
2795}
2796
2797int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2798 struct cfg80211_csa_settings *csa_settings)
2799{
2800 struct sk_buff *skb;
2801 struct ieee80211_mgmt *mgmt;
2802 struct ieee80211_local *local = sdata->local;
2803 int freq;
2804 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2805 sizeof(mgmt->u.action.u.chan_switch);
2806 u8 *pos;
2807
2808 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2809 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2810 return -EOPNOTSUPP;
2811
2812 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2813 5 + /* channel switch announcement element */
2814 3 + /* secondary channel offset element */
2815 8); /* mesh channel switch parameters element */
2816 if (!skb)
2817 return -ENOMEM;
2818
2819 skb_reserve(skb, local->tx_headroom);
2820 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2821 memset(mgmt, 0, hdr_len);
2822 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2823 IEEE80211_STYPE_ACTION);
2824
2825 eth_broadcast_addr(mgmt->da);
2826 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2827 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2828 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2829 } else {
2830 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2831 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2832 }
2833 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2834 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2835 pos = skb_put(skb, 5);
2836 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2837 *pos++ = 3; /* IE length */
2838 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2839 freq = csa_settings->chandef.chan->center_freq;
2840 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2841 *pos++ = csa_settings->count; /* count */
2842
2843 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2844 enum nl80211_channel_type ch_type;
2845
2846 skb_put(skb, 3);
2847 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2848 *pos++ = 1; /* IE length */
2849 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2850 if (ch_type == NL80211_CHAN_HT40PLUS)
2851 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2852 else
2853 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2854 }
2855
2856 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2857 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2858
2859 skb_put(skb, 8);
2860 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2861 *pos++ = 6; /* IE length */
2862 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2863 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2864 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2865 *pos++ |= csa_settings->block_tx ?
2866 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2867 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2868 pos += 2;
2869 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2870 pos += 2;
2871 }
2872
2873 ieee80211_tx_skb(sdata, skb);
2874 return 0;
2875}
2876
2877bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2878{
2879 return !(cs == NULL || cs->cipher == 0 ||
2880 cs->hdr_len < cs->pn_len + cs->pn_off ||
2881 cs->hdr_len <= cs->key_idx_off ||
2882 cs->key_idx_shift > 7 ||
2883 cs->key_idx_mask == 0);
2884}
2885
2886bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2887{
2888 int i;
2889
2890 /* Ensure we have enough iftype bitmap space for all iftype values */
2891 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2892
2893 for (i = 0; i < n; i++)
2894 if (!ieee80211_cs_valid(&cs[i]))
2895 return false;
2896
2897 return true;
2898}
2899
2900const struct ieee80211_cipher_scheme *
2901ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2902 enum nl80211_iftype iftype)
2903{
2904 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2905 int n = local->hw.n_cipher_schemes;
2906 int i;
2907 const struct ieee80211_cipher_scheme *cs = NULL;
2908
2909 for (i = 0; i < n; i++) {
2910 if (l[i].cipher == cipher) {
2911 cs = &l[i];
2912 break;
2913 }
2914 }
2915
2916 if (!cs || !(cs->iftype & BIT(iftype)))
2917 return NULL;
2918
2919 return cs;
2920}
2921
2922int ieee80211_cs_headroom(struct ieee80211_local *local,
2923 struct cfg80211_crypto_settings *crypto,
2924 enum nl80211_iftype iftype)
2925{
2926 const struct ieee80211_cipher_scheme *cs;
2927 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2928 int i;
2929
2930 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2931 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2932 iftype);
2933
2934 if (cs && headroom < cs->hdr_len)
2935 headroom = cs->hdr_len;
2936 }
2937
2938 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2939 if (cs && headroom < cs->hdr_len)
2940 headroom = cs->hdr_len;
2941
2942 return headroom;
2943}
2944
2945static bool
2946ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2947{
2948 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2949 int skip;
2950
2951 if (end > 0)
2952 return false;
2953
2954 /* End time is in the past, check for repetitions */
2955 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2956 if (data->count[i] < 255) {
2957 if (data->count[i] <= skip) {
2958 data->count[i] = 0;
2959 return false;
2960 }
2961
2962 data->count[i] -= skip;
2963 }
2964
2965 data->desc[i].start += skip * data->desc[i].interval;
2966
2967 return true;
2968}
2969
2970static bool
2971ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2972 s32 *offset)
2973{
2974 bool ret = false;
2975 int i;
2976
2977 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2978 s32 cur;
2979
2980 if (!data->count[i])
2981 continue;
2982
2983 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2984 ret = true;
2985
2986 cur = data->desc[i].start - tsf;
2987 if (cur > *offset)
2988 continue;
2989
2990 cur = data->desc[i].start + data->desc[i].duration - tsf;
2991 if (cur > *offset)
2992 *offset = cur;
2993 }
2994
2995 return ret;
2996}
2997
2998static u32
2999ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3000{
3001 s32 offset = 0;
3002 int tries = 0;
3003 /*
3004 * arbitrary limit, used to avoid infinite loops when combined NoA
3005 * descriptors cover the full time period.
3006 */
3007 int max_tries = 5;
3008
3009 ieee80211_extend_absent_time(data, tsf, &offset);
3010 do {
3011 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3012 break;
3013
3014 tries++;
3015 } while (tries < max_tries);
3016
3017 return offset;
3018}
3019
3020void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3021{
3022 u32 next_offset = BIT(31) - 1;
3023 int i;
3024
3025 data->absent = 0;
3026 data->has_next_tsf = false;
3027 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3028 s32 start;
3029
3030 if (!data->count[i])
3031 continue;
3032
3033 ieee80211_extend_noa_desc(data, tsf, i);
3034 start = data->desc[i].start - tsf;
3035 if (start <= 0)
3036 data->absent |= BIT(i);
3037
3038 if (next_offset > start)
3039 next_offset = start;
3040
3041 data->has_next_tsf = true;
3042 }
3043
3044 if (data->absent)
3045 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3046
3047 data->next_tsf = tsf + next_offset;
3048}
3049EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3050
3051int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3052 struct ieee80211_noa_data *data, u32 tsf)
3053{
3054 int ret = 0;
3055 int i;
3056
3057 memset(data, 0, sizeof(*data));
3058
3059 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3060 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3061
3062 if (!desc->count || !desc->duration)
3063 continue;
3064
3065 data->count[i] = desc->count;
3066 data->desc[i].start = le32_to_cpu(desc->start_time);
3067 data->desc[i].duration = le32_to_cpu(desc->duration);
3068 data->desc[i].interval = le32_to_cpu(desc->interval);
3069
3070 if (data->count[i] > 1 &&
3071 data->desc[i].interval < data->desc[i].duration)
3072 continue;
3073
3074 ieee80211_extend_noa_desc(data, tsf, i);
3075 ret++;
3076 }
3077
3078 if (ret)
3079 ieee80211_update_p2p_noa(data, tsf);
3080
3081 return ret;
3082}
3083EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3084
3085void ieee80211_recalc_dtim(struct ieee80211_local *local,
3086 struct ieee80211_sub_if_data *sdata)
3087{
3088 u64 tsf = drv_get_tsf(local, sdata);
3089 u64 dtim_count = 0;
3090 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3091 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3092 struct ps_data *ps;
3093 u8 bcns_from_dtim;
3094
3095 if (tsf == -1ULL || !beacon_int || !dtim_period)
3096 return;
3097
3098 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3099 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3100 if (!sdata->bss)
3101 return;
3102
3103 ps = &sdata->bss->ps;
3104 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3105 ps = &sdata->u.mesh.ps;
3106 } else {
3107 return;
3108 }
3109
3110 /*
3111 * actually finds last dtim_count, mac80211 will update in
3112 * __beacon_add_tim().
3113 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3114 */
3115 do_div(tsf, beacon_int);
3116 bcns_from_dtim = do_div(tsf, dtim_period);
3117 /* just had a DTIM */
3118 if (!bcns_from_dtim)
3119 dtim_count = 0;
3120 else
3121 dtim_count = dtim_period - bcns_from_dtim;
3122
3123 ps->dtim_count = dtim_count;
3124}
3125
3126static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3127 struct ieee80211_chanctx *ctx)
3128{
3129 struct ieee80211_sub_if_data *sdata;
3130 u8 radar_detect = 0;
3131
3132 lockdep_assert_held(&local->chanctx_mtx);
3133
3134 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3135 return 0;
3136
3137 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3138 if (sdata->reserved_radar_required)
3139 radar_detect |= BIT(sdata->reserved_chandef.width);
3140
3141 /*
3142 * An in-place reservation context should not have any assigned vifs
3143 * until it replaces the other context.
3144 */
3145 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3146 !list_empty(&ctx->assigned_vifs));
3147
3148 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3149 if (sdata->radar_required)
3150 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3151
3152 return radar_detect;
3153}
3154
3155int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3156 const struct cfg80211_chan_def *chandef,
3157 enum ieee80211_chanctx_mode chanmode,
3158 u8 radar_detect)
3159{
3160 struct ieee80211_local *local = sdata->local;
3161 struct ieee80211_sub_if_data *sdata_iter;
3162 enum nl80211_iftype iftype = sdata->wdev.iftype;
3163 int num[NUM_NL80211_IFTYPES];
3164 struct ieee80211_chanctx *ctx;
3165 int num_different_channels = 0;
3166 int total = 1;
3167
3168 lockdep_assert_held(&local->chanctx_mtx);
3169
3170 if (WARN_ON(hweight32(radar_detect) > 1))
3171 return -EINVAL;
3172
3173 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3174 !chandef->chan))
3175 return -EINVAL;
3176
3177 if (chandef)
3178 num_different_channels = 1;
3179
3180 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3181 return -EINVAL;
3182
3183 /* Always allow software iftypes */
3184 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3185 if (radar_detect)
3186 return -EINVAL;
3187 return 0;
3188 }
3189
3190 memset(num, 0, sizeof(num));
3191
3192 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3193 num[iftype] = 1;
3194
3195 list_for_each_entry(ctx, &local->chanctx_list, list) {
3196 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3197 continue;
3198 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3199 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3200 num_different_channels++;
3201 continue;
3202 }
3203 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3204 cfg80211_chandef_compatible(chandef,
3205 &ctx->conf.def))
3206 continue;
3207 num_different_channels++;
3208 }
3209
3210 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3211 struct wireless_dev *wdev_iter;
3212
3213 wdev_iter = &sdata_iter->wdev;
3214
3215 if (sdata_iter == sdata ||
3216 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3217 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3218 continue;
3219
3220 num[wdev_iter->iftype]++;
3221 total++;
3222 }
3223
3224 if (total == 1 && !radar_detect)
3225 return 0;
3226
3227 return cfg80211_check_combinations(local->hw.wiphy,
3228 num_different_channels,
3229 radar_detect, num);
3230}
3231
3232static void
3233ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3234 void *data)
3235{
3236 u32 *max_num_different_channels = data;
3237
3238 *max_num_different_channels = max(*max_num_different_channels,
3239 c->num_different_channels);
3240}
3241
3242int ieee80211_max_num_channels(struct ieee80211_local *local)
3243{
3244 struct ieee80211_sub_if_data *sdata;
3245 int num[NUM_NL80211_IFTYPES] = {};
3246 struct ieee80211_chanctx *ctx;
3247 int num_different_channels = 0;
3248 u8 radar_detect = 0;
3249 u32 max_num_different_channels = 1;
3250 int err;
3251
3252 lockdep_assert_held(&local->chanctx_mtx);
3253
3254 list_for_each_entry(ctx, &local->chanctx_list, list) {
3255 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3256 continue;
3257
3258 num_different_channels++;
3259
3260 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3261 }
3262
3263 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3264 num[sdata->wdev.iftype]++;
3265
3266 err = cfg80211_iter_combinations(local->hw.wiphy,
3267 num_different_channels, radar_detect,
3268 num, ieee80211_iter_max_chans,
3269 &max_num_different_channels);
3270 if (err < 0)
3271 return err;
3272
3273 return max_num_different_channels;
3274}
3275
3276u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3277{
3278 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3279 *buf++ = 7; /* len */
3280 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3281 *buf++ = 0x50;
3282 *buf++ = 0xf2;
3283 *buf++ = 2; /* WME */
3284 *buf++ = 0; /* WME info */
3285 *buf++ = 1; /* WME ver */
3286 *buf++ = qosinfo; /* U-APSD no in use */
3287
3288 return buf;
3289}
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