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Linux 4.1.16
[linux/fpc-iii.git] / net / mac80211 / util.c
blob67fec9ba97fce786e942230fa7761316aff55ce9
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 */
38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39
40 struct 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 }
48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
49
50 u8 *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
99 void 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
110 int 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 }
203 EXPORT_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 }
246 EXPORT_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 }
288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
290 void 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 (local->ops->wake_tx_queue &&
312 (atomic_read(&sdata->txqs_len[ac]) >
313 local->hw.txq_ac_max_pending))
314 continue;
315
316 if (ac_queue == queue ||
317 (sdata->vif.cab_queue == queue &&
318 local->queue_stop_reasons[ac_queue] == 0 &&
319 skb_queue_empty(&local->pending[ac_queue])))
320 netif_wake_subqueue(sdata->dev, ac);
321 }
322 }
323 }
324
325 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
326 enum queue_stop_reason reason,
327 bool refcounted)
328 {
329 struct ieee80211_local *local = hw_to_local(hw);
330
331 trace_wake_queue(local, queue, reason);
332
333 if (WARN_ON(queue >= hw->queues))
334 return;
335
336 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
337 return;
338
339 if (!refcounted)
340 local->q_stop_reasons[queue][reason] = 0;
341 else
342 local->q_stop_reasons[queue][reason]--;
343
344 if (local->q_stop_reasons[queue][reason] == 0)
345 __clear_bit(reason, &local->queue_stop_reasons[queue]);
346
347 if (local->queue_stop_reasons[queue] != 0)
348 /* someone still has this queue stopped */
349 return;
350
351 if (skb_queue_empty(&local->pending[queue])) {
352 rcu_read_lock();
353 ieee80211_propagate_queue_wake(local, queue);
354 rcu_read_unlock();
355 } else
356 tasklet_schedule(&local->tx_pending_tasklet);
357 }
358
359 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
360 enum queue_stop_reason reason,
361 bool refcounted)
362 {
363 struct ieee80211_local *local = hw_to_local(hw);
364 unsigned long flags;
365
366 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
367 __ieee80211_wake_queue(hw, queue, reason, refcounted);
368 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
369 }
370
371 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
372 {
373 ieee80211_wake_queue_by_reason(hw, queue,
374 IEEE80211_QUEUE_STOP_REASON_DRIVER,
375 false);
376 }
377 EXPORT_SYMBOL(ieee80211_wake_queue);
378
379 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
380 enum queue_stop_reason reason,
381 bool refcounted)
382 {
383 struct ieee80211_local *local = hw_to_local(hw);
384 struct ieee80211_sub_if_data *sdata;
385 int n_acs = IEEE80211_NUM_ACS;
386
387 trace_stop_queue(local, queue, reason);
388
389 if (WARN_ON(queue >= hw->queues))
390 return;
391
392 if (!refcounted)
393 local->q_stop_reasons[queue][reason] = 1;
394 else
395 local->q_stop_reasons[queue][reason]++;
396
397 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
398 return;
399
400 if (local->hw.queues < IEEE80211_NUM_ACS)
401 n_acs = 1;
402
403 rcu_read_lock();
404 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
405 int ac;
406
407 if (!sdata->dev)
408 continue;
409
410 for (ac = 0; ac < n_acs; ac++) {
411 if (sdata->vif.hw_queue[ac] == queue ||
412 sdata->vif.cab_queue == queue)
413 netif_stop_subqueue(sdata->dev, ac);
414 }
415 }
416 rcu_read_unlock();
417 }
418
419 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
420 enum queue_stop_reason reason,
421 bool refcounted)
422 {
423 struct ieee80211_local *local = hw_to_local(hw);
424 unsigned long flags;
425
426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
427 __ieee80211_stop_queue(hw, queue, reason, refcounted);
428 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
429 }
430
431 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
432 {
433 ieee80211_stop_queue_by_reason(hw, queue,
434 IEEE80211_QUEUE_STOP_REASON_DRIVER,
435 false);
436 }
437 EXPORT_SYMBOL(ieee80211_stop_queue);
438
439 void ieee80211_add_pending_skb(struct ieee80211_local *local,
440 struct sk_buff *skb)
441 {
442 struct ieee80211_hw *hw = &local->hw;
443 unsigned long flags;
444 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
445 int queue = info->hw_queue;
446
447 if (WARN_ON(!info->control.vif)) {
448 ieee80211_free_txskb(&local->hw, skb);
449 return;
450 }
451
452 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
453 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
454 false);
455 __skb_queue_tail(&local->pending[queue], skb);
456 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
457 false);
458 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
459 }
460
461 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
462 struct sk_buff_head *skbs)
463 {
464 struct ieee80211_hw *hw = &local->hw;
465 struct sk_buff *skb;
466 unsigned long flags;
467 int queue, i;
468
469 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
470 while ((skb = skb_dequeue(skbs))) {
471 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
472
473 if (WARN_ON(!info->control.vif)) {
474 ieee80211_free_txskb(&local->hw, skb);
475 continue;
476 }
477
478 queue = info->hw_queue;
479
480 __ieee80211_stop_queue(hw, queue,
481 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
482 false);
483
484 __skb_queue_tail(&local->pending[queue], skb);
485 }
486
487 for (i = 0; i < hw->queues; i++)
488 __ieee80211_wake_queue(hw, i,
489 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
490 false);
491 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
492 }
493
494 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
495 unsigned long queues,
496 enum queue_stop_reason reason,
497 bool refcounted)
498 {
499 struct ieee80211_local *local = hw_to_local(hw);
500 unsigned long flags;
501 int i;
502
503 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
504
505 for_each_set_bit(i, &queues, hw->queues)
506 __ieee80211_stop_queue(hw, i, reason, refcounted);
507
508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
509 }
510
511 void ieee80211_stop_queues(struct ieee80211_hw *hw)
512 {
513 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
514 IEEE80211_QUEUE_STOP_REASON_DRIVER,
515 false);
516 }
517 EXPORT_SYMBOL(ieee80211_stop_queues);
518
519 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
520 {
521 struct ieee80211_local *local = hw_to_local(hw);
522 unsigned long flags;
523 int ret;
524
525 if (WARN_ON(queue >= hw->queues))
526 return true;
527
528 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
529 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
530 &local->queue_stop_reasons[queue]);
531 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
532 return ret;
533 }
534 EXPORT_SYMBOL(ieee80211_queue_stopped);
535
536 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
537 unsigned long queues,
538 enum queue_stop_reason reason,
539 bool refcounted)
540 {
541 struct ieee80211_local *local = hw_to_local(hw);
542 unsigned long flags;
543 int i;
544
545 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
546
547 for_each_set_bit(i, &queues, hw->queues)
548 __ieee80211_wake_queue(hw, i, reason, refcounted);
549
550 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
551 }
552
553 void ieee80211_wake_queues(struct ieee80211_hw *hw)
554 {
555 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
556 IEEE80211_QUEUE_STOP_REASON_DRIVER,
557 false);
558 }
559 EXPORT_SYMBOL(ieee80211_wake_queues);
560
561 static unsigned int
562 ieee80211_get_vif_queues(struct ieee80211_local *local,
563 struct ieee80211_sub_if_data *sdata)
564 {
565 unsigned int queues;
566
567 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
568 int ac;
569
570 queues = 0;
571
572 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
573 queues |= BIT(sdata->vif.hw_queue[ac]);
574 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
575 queues |= BIT(sdata->vif.cab_queue);
576 } else {
577 /* all queues */
578 queues = BIT(local->hw.queues) - 1;
579 }
580
581 return queues;
582 }
583
584 void __ieee80211_flush_queues(struct ieee80211_local *local,
585 struct ieee80211_sub_if_data *sdata,
586 unsigned int queues, bool drop)
587 {
588 if (!local->ops->flush)
589 return;
590
591 /*
592 * If no queue was set, or if the HW doesn't support
593 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
594 */
595 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
596 queues = ieee80211_get_vif_queues(local, sdata);
597
598 ieee80211_stop_queues_by_reason(&local->hw, queues,
599 IEEE80211_QUEUE_STOP_REASON_FLUSH,
600 false);
601
602 drv_flush(local, sdata, queues, drop);
603
604 ieee80211_wake_queues_by_reason(&local->hw, queues,
605 IEEE80211_QUEUE_STOP_REASON_FLUSH,
606 false);
607 }
608
609 void ieee80211_flush_queues(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata, bool drop)
611 {
612 __ieee80211_flush_queues(local, sdata, 0, drop);
613 }
614
615 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
616 struct ieee80211_sub_if_data *sdata,
617 enum queue_stop_reason reason)
618 {
619 ieee80211_stop_queues_by_reason(&local->hw,
620 ieee80211_get_vif_queues(local, sdata),
621 reason, true);
622 }
623
624 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
625 struct ieee80211_sub_if_data *sdata,
626 enum queue_stop_reason reason)
627 {
628 ieee80211_wake_queues_by_reason(&local->hw,
629 ieee80211_get_vif_queues(local, sdata),
630 reason, true);
631 }
632
633 static void __iterate_interfaces(struct ieee80211_local *local,
634 u32 iter_flags,
635 void (*iterator)(void *data, u8 *mac,
636 struct ieee80211_vif *vif),
637 void *data)
638 {
639 struct ieee80211_sub_if_data *sdata;
640 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
641
642 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
643 switch (sdata->vif.type) {
644 case NL80211_IFTYPE_MONITOR:
645 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
646 continue;
647 break;
648 case NL80211_IFTYPE_AP_VLAN:
649 continue;
650 default:
651 break;
652 }
653 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
654 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
655 continue;
656 if (ieee80211_sdata_running(sdata) || !active_only)
657 iterator(data, sdata->vif.addr,
658 &sdata->vif);
659 }
660
661 sdata = rcu_dereference_check(local->monitor_sdata,
662 lockdep_is_held(&local->iflist_mtx) ||
663 lockdep_rtnl_is_held());
664 if (sdata &&
665 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
666 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
667 iterator(data, sdata->vif.addr, &sdata->vif);
668 }
669
670 void ieee80211_iterate_interfaces(
671 struct ieee80211_hw *hw, u32 iter_flags,
672 void (*iterator)(void *data, u8 *mac,
673 struct ieee80211_vif *vif),
674 void *data)
675 {
676 struct ieee80211_local *local = hw_to_local(hw);
677
678 mutex_lock(&local->iflist_mtx);
679 __iterate_interfaces(local, iter_flags, iterator, data);
680 mutex_unlock(&local->iflist_mtx);
681 }
682 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
683
684 void ieee80211_iterate_active_interfaces_atomic(
685 struct ieee80211_hw *hw, u32 iter_flags,
686 void (*iterator)(void *data, u8 *mac,
687 struct ieee80211_vif *vif),
688 void *data)
689 {
690 struct ieee80211_local *local = hw_to_local(hw);
691
692 rcu_read_lock();
693 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
694 iterator, data);
695 rcu_read_unlock();
696 }
697 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
698
699 void ieee80211_iterate_active_interfaces_rtnl(
700 struct ieee80211_hw *hw, u32 iter_flags,
701 void (*iterator)(void *data, u8 *mac,
702 struct ieee80211_vif *vif),
703 void *data)
704 {
705 struct ieee80211_local *local = hw_to_local(hw);
706
707 ASSERT_RTNL();
708
709 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
710 iterator, data);
711 }
712 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
713
714 static void __iterate_stations(struct ieee80211_local *local,
715 void (*iterator)(void *data,
716 struct ieee80211_sta *sta),
717 void *data)
718 {
719 struct sta_info *sta;
720
721 list_for_each_entry_rcu(sta, &local->sta_list, list) {
722 if (!sta->uploaded)
723 continue;
724
725 iterator(data, &sta->sta);
726 }
727 }
728
729 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
730 void (*iterator)(void *data,
731 struct ieee80211_sta *sta),
732 void *data)
733 {
734 struct ieee80211_local *local = hw_to_local(hw);
735
736 rcu_read_lock();
737 __iterate_stations(local, iterator, data);
738 rcu_read_unlock();
739 }
740 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
741
742 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
743 {
744 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
745
746 if (!ieee80211_sdata_running(sdata) ||
747 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
748 return NULL;
749 return &sdata->vif;
750 }
751 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
752
753 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
754 {
755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
756
757 if (!ieee80211_sdata_running(sdata) ||
758 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
759 return NULL;
760
761 return &sdata->wdev;
762 }
763 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
764
765 /*
766 * Nothing should have been stuffed into the workqueue during
767 * the suspend->resume cycle. Since we can't check each caller
768 * of this function if we are already quiescing / suspended,
769 * check here and don't WARN since this can actually happen when
770 * the rx path (for example) is racing against __ieee80211_suspend
771 * and suspending / quiescing was set after the rx path checked
772 * them.
773 */
774 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
775 {
776 if (local->quiescing || (local->suspended && !local->resuming)) {
777 pr_warn("queueing ieee80211 work while going to suspend\n");
778 return false;
779 }
780
781 return true;
782 }
783
784 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
785 {
786 struct ieee80211_local *local = hw_to_local(hw);
787
788 if (!ieee80211_can_queue_work(local))
789 return;
790
791 queue_work(local->workqueue, work);
792 }
793 EXPORT_SYMBOL(ieee80211_queue_work);
794
795 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
796 struct delayed_work *dwork,
797 unsigned long delay)
798 {
799 struct ieee80211_local *local = hw_to_local(hw);
800
801 if (!ieee80211_can_queue_work(local))
802 return;
803
804 queue_delayed_work(local->workqueue, dwork, delay);
805 }
806 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
807
808 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
809 struct ieee802_11_elems *elems,
810 u64 filter, u32 crc)
811 {
812 size_t left = len;
813 const u8 *pos = start;
814 bool calc_crc = filter != 0;
815 DECLARE_BITMAP(seen_elems, 256);
816 const u8 *ie;
817
818 bitmap_zero(seen_elems, 256);
819 memset(elems, 0, sizeof(*elems));
820 elems->ie_start = start;
821 elems->total_len = len;
822
823 while (left >= 2) {
824 u8 id, elen;
825 bool elem_parse_failed;
826
827 id = *pos++;
828 elen = *pos++;
829 left -= 2;
830
831 if (elen > left) {
832 elems->parse_error = true;
833 break;
834 }
835
836 switch (id) {
837 case WLAN_EID_SSID:
838 case WLAN_EID_SUPP_RATES:
839 case WLAN_EID_FH_PARAMS:
840 case WLAN_EID_DS_PARAMS:
841 case WLAN_EID_CF_PARAMS:
842 case WLAN_EID_TIM:
843 case WLAN_EID_IBSS_PARAMS:
844 case WLAN_EID_CHALLENGE:
845 case WLAN_EID_RSN:
846 case WLAN_EID_ERP_INFO:
847 case WLAN_EID_EXT_SUPP_RATES:
848 case WLAN_EID_HT_CAPABILITY:
849 case WLAN_EID_HT_OPERATION:
850 case WLAN_EID_VHT_CAPABILITY:
851 case WLAN_EID_VHT_OPERATION:
852 case WLAN_EID_MESH_ID:
853 case WLAN_EID_MESH_CONFIG:
854 case WLAN_EID_PEER_MGMT:
855 case WLAN_EID_PREQ:
856 case WLAN_EID_PREP:
857 case WLAN_EID_PERR:
858 case WLAN_EID_RANN:
859 case WLAN_EID_CHANNEL_SWITCH:
860 case WLAN_EID_EXT_CHANSWITCH_ANN:
861 case WLAN_EID_COUNTRY:
862 case WLAN_EID_PWR_CONSTRAINT:
863 case WLAN_EID_TIMEOUT_INTERVAL:
864 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
865 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
866 case WLAN_EID_CHAN_SWITCH_PARAM:
867 case WLAN_EID_EXT_CAPABILITY:
868 case WLAN_EID_CHAN_SWITCH_TIMING:
869 case WLAN_EID_LINK_ID:
870 /*
871 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
872 * that if the content gets bigger it might be needed more than once
873 */
874 if (test_bit(id, seen_elems)) {
875 elems->parse_error = true;
876 left -= elen;
877 pos += elen;
878 continue;
879 }
880 break;
881 }
882
883 if (calc_crc && id < 64 && (filter & (1ULL << id)))
884 crc = crc32_be(crc, pos - 2, elen + 2);
885
886 elem_parse_failed = false;
887
888 switch (id) {
889 case WLAN_EID_LINK_ID:
890 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
891 elem_parse_failed = true;
892 break;
893 }
894 elems->lnk_id = (void *)(pos - 2);
895 break;
896 case WLAN_EID_CHAN_SWITCH_TIMING:
897 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
898 elem_parse_failed = true;
899 break;
900 }
901 elems->ch_sw_timing = (void *)pos;
902 break;
903 case WLAN_EID_EXT_CAPABILITY:
904 elems->ext_capab = pos;
905 elems->ext_capab_len = elen;
906 break;
907 case WLAN_EID_SSID:
908 elems->ssid = pos;
909 elems->ssid_len = elen;
910 break;
911 case WLAN_EID_SUPP_RATES:
912 elems->supp_rates = pos;
913 elems->supp_rates_len = elen;
914 break;
915 case WLAN_EID_DS_PARAMS:
916 if (elen >= 1)
917 elems->ds_params = pos;
918 else
919 elem_parse_failed = true;
920 break;
921 case WLAN_EID_TIM:
922 if (elen >= sizeof(struct ieee80211_tim_ie)) {
923 elems->tim = (void *)pos;
924 elems->tim_len = elen;
925 } else
926 elem_parse_failed = true;
927 break;
928 case WLAN_EID_CHALLENGE:
929 elems->challenge = pos;
930 elems->challenge_len = elen;
931 break;
932 case WLAN_EID_VENDOR_SPECIFIC:
933 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
934 pos[2] == 0xf2) {
935 /* Microsoft OUI (00:50:F2) */
936
937 if (calc_crc)
938 crc = crc32_be(crc, pos - 2, elen + 2);
939
940 if (elen >= 5 && pos[3] == 2) {
941 /* OUI Type 2 - WMM IE */
942 if (pos[4] == 0) {
943 elems->wmm_info = pos;
944 elems->wmm_info_len = elen;
945 } else if (pos[4] == 1) {
946 elems->wmm_param = pos;
947 elems->wmm_param_len = elen;
948 }
949 }
950 }
951 break;
952 case WLAN_EID_RSN:
953 elems->rsn = pos;
954 elems->rsn_len = elen;
955 break;
956 case WLAN_EID_ERP_INFO:
957 if (elen >= 1)
958 elems->erp_info = pos;
959 else
960 elem_parse_failed = true;
961 break;
962 case WLAN_EID_EXT_SUPP_RATES:
963 elems->ext_supp_rates = pos;
964 elems->ext_supp_rates_len = elen;
965 break;
966 case WLAN_EID_HT_CAPABILITY:
967 if (elen >= sizeof(struct ieee80211_ht_cap))
968 elems->ht_cap_elem = (void *)pos;
969 else
970 elem_parse_failed = true;
971 break;
972 case WLAN_EID_HT_OPERATION:
973 if (elen >= sizeof(struct ieee80211_ht_operation))
974 elems->ht_operation = (void *)pos;
975 else
976 elem_parse_failed = true;
977 break;
978 case WLAN_EID_VHT_CAPABILITY:
979 if (elen >= sizeof(struct ieee80211_vht_cap))
980 elems->vht_cap_elem = (void *)pos;
981 else
982 elem_parse_failed = true;
983 break;
984 case WLAN_EID_VHT_OPERATION:
985 if (elen >= sizeof(struct ieee80211_vht_operation))
986 elems->vht_operation = (void *)pos;
987 else
988 elem_parse_failed = true;
989 break;
990 case WLAN_EID_OPMODE_NOTIF:
991 if (elen > 0)
992 elems->opmode_notif = pos;
993 else
994 elem_parse_failed = true;
995 break;
996 case WLAN_EID_MESH_ID:
997 elems->mesh_id = pos;
998 elems->mesh_id_len = elen;
999 break;
1000 case WLAN_EID_MESH_CONFIG:
1001 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1002 elems->mesh_config = (void *)pos;
1003 else
1004 elem_parse_failed = true;
1005 break;
1006 case WLAN_EID_PEER_MGMT:
1007 elems->peering = pos;
1008 elems->peering_len = elen;
1009 break;
1010 case WLAN_EID_MESH_AWAKE_WINDOW:
1011 if (elen >= 2)
1012 elems->awake_window = (void *)pos;
1013 break;
1014 case WLAN_EID_PREQ:
1015 elems->preq = pos;
1016 elems->preq_len = elen;
1017 break;
1018 case WLAN_EID_PREP:
1019 elems->prep = pos;
1020 elems->prep_len = elen;
1021 break;
1022 case WLAN_EID_PERR:
1023 elems->perr = pos;
1024 elems->perr_len = elen;
1025 break;
1026 case WLAN_EID_RANN:
1027 if (elen >= sizeof(struct ieee80211_rann_ie))
1028 elems->rann = (void *)pos;
1029 else
1030 elem_parse_failed = true;
1031 break;
1032 case WLAN_EID_CHANNEL_SWITCH:
1033 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1034 elem_parse_failed = true;
1035 break;
1036 }
1037 elems->ch_switch_ie = (void *)pos;
1038 break;
1039 case WLAN_EID_EXT_CHANSWITCH_ANN:
1040 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1041 elem_parse_failed = true;
1042 break;
1043 }
1044 elems->ext_chansw_ie = (void *)pos;
1045 break;
1046 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1048 elem_parse_failed = true;
1049 break;
1050 }
1051 elems->sec_chan_offs = (void *)pos;
1052 break;
1053 case WLAN_EID_CHAN_SWITCH_PARAM:
1054 if (elen !=
1055 sizeof(*elems->mesh_chansw_params_ie)) {
1056 elem_parse_failed = true;
1057 break;
1058 }
1059 elems->mesh_chansw_params_ie = (void *)pos;
1060 break;
1061 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1062 if (!action ||
1063 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1064 elem_parse_failed = true;
1065 break;
1066 }
1067 elems->wide_bw_chansw_ie = (void *)pos;
1068 break;
1069 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1070 if (action) {
1071 elem_parse_failed = true;
1072 break;
1073 }
1074 /*
1075 * This is a bit tricky, but as we only care about
1076 * the wide bandwidth channel switch element, so
1077 * just parse it out manually.
1078 */
1079 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1080 pos, elen);
1081 if (ie) {
1082 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1083 elems->wide_bw_chansw_ie =
1084 (void *)(ie + 2);
1085 else
1086 elem_parse_failed = true;
1087 }
1088 break;
1089 case WLAN_EID_COUNTRY:
1090 elems->country_elem = pos;
1091 elems->country_elem_len = elen;
1092 break;
1093 case WLAN_EID_PWR_CONSTRAINT:
1094 if (elen != 1) {
1095 elem_parse_failed = true;
1096 break;
1097 }
1098 elems->pwr_constr_elem = pos;
1099 break;
1100 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1101 /* Lots of different options exist, but we only care
1102 * about the Dynamic Transmit Power Control element.
1103 * First check for the Cisco OUI, then for the DTPC
1104 * tag (0x00).
1105 */
1106 if (elen < 4) {
1107 elem_parse_failed = true;
1108 break;
1109 }
1110
1111 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1112 pos[2] != 0x96 || pos[3] != 0x00)
1113 break;
1114
1115 if (elen != 6) {
1116 elem_parse_failed = true;
1117 break;
1118 }
1119
1120 if (calc_crc)
1121 crc = crc32_be(crc, pos - 2, elen + 2);
1122
1123 elems->cisco_dtpc_elem = pos;
1124 break;
1125 case WLAN_EID_TIMEOUT_INTERVAL:
1126 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1127 elems->timeout_int = (void *)pos;
1128 else
1129 elem_parse_failed = true;
1130 break;
1131 default:
1132 break;
1133 }
1134
1135 if (elem_parse_failed)
1136 elems->parse_error = true;
1137 else
1138 __set_bit(id, seen_elems);
1139
1140 left -= elen;
1141 pos += elen;
1142 }
1143
1144 if (left != 0)
1145 elems->parse_error = true;
1146
1147 return crc;
1148 }
1149
1150 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1151 bool bss_notify)
1152 {
1153 struct ieee80211_local *local = sdata->local;
1154 struct ieee80211_tx_queue_params qparam;
1155 struct ieee80211_chanctx_conf *chanctx_conf;
1156 int ac;
1157 bool use_11b, enable_qos;
1158 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1159 int aCWmin, aCWmax;
1160
1161 if (!local->ops->conf_tx)
1162 return;
1163
1164 if (local->hw.queues < IEEE80211_NUM_ACS)
1165 return;
1166
1167 memset(&qparam, 0, sizeof(qparam));
1168
1169 rcu_read_lock();
1170 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1171 use_11b = (chanctx_conf &&
1172 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1173 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1174 rcu_read_unlock();
1175
1176 /*
1177 * By default disable QoS in STA mode for old access points, which do
1178 * not support 802.11e. New APs will provide proper queue parameters,
1179 * that we will configure later.
1180 */
1181 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1182
1183 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1184
1185 /* Set defaults according to 802.11-2007 Table 7-37 */
1186 aCWmax = 1023;
1187 if (use_11b)
1188 aCWmin = 31;
1189 else
1190 aCWmin = 15;
1191
1192 /* Confiure old 802.11b/g medium access rules. */
1193 qparam.cw_max = aCWmax;
1194 qparam.cw_min = aCWmin;
1195 qparam.txop = 0;
1196 qparam.aifs = 2;
1197
1198 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1199 /* Update if QoS is enabled. */
1200 if (enable_qos) {
1201 switch (ac) {
1202 case IEEE80211_AC_BK:
1203 qparam.cw_max = aCWmax;
1204 qparam.cw_min = aCWmin;
1205 qparam.txop = 0;
1206 if (is_ocb)
1207 qparam.aifs = 9;
1208 else
1209 qparam.aifs = 7;
1210 break;
1211 /* never happens but let's not leave undefined */
1212 default:
1213 case IEEE80211_AC_BE:
1214 qparam.cw_max = aCWmax;
1215 qparam.cw_min = aCWmin;
1216 qparam.txop = 0;
1217 if (is_ocb)
1218 qparam.aifs = 6;
1219 else
1220 qparam.aifs = 3;
1221 break;
1222 case IEEE80211_AC_VI:
1223 qparam.cw_max = aCWmin;
1224 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1225 if (is_ocb)
1226 qparam.txop = 0;
1227 else if (use_11b)
1228 qparam.txop = 6016/32;
1229 else
1230 qparam.txop = 3008/32;
1231
1232 if (is_ocb)
1233 qparam.aifs = 3;
1234 else
1235 qparam.aifs = 2;
1236 break;
1237 case IEEE80211_AC_VO:
1238 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1239 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1240 if (is_ocb)
1241 qparam.txop = 0;
1242 else if (use_11b)
1243 qparam.txop = 3264/32;
1244 else
1245 qparam.txop = 1504/32;
1246 qparam.aifs = 2;
1247 break;
1248 }
1249 }
1250
1251 qparam.uapsd = false;
1252
1253 sdata->tx_conf[ac] = qparam;
1254 drv_conf_tx(local, sdata, ac, &qparam);
1255 }
1256
1257 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1258 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1259 sdata->vif.bss_conf.qos = enable_qos;
1260 if (bss_notify)
1261 ieee80211_bss_info_change_notify(sdata,
1262 BSS_CHANGED_QOS);
1263 }
1264 }
1265
1266 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1267 u16 transaction, u16 auth_alg, u16 status,
1268 const u8 *extra, size_t extra_len, const u8 *da,
1269 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1270 u32 tx_flags)
1271 {
1272 struct ieee80211_local *local = sdata->local;
1273 struct sk_buff *skb;
1274 struct ieee80211_mgmt *mgmt;
1275 int err;
1276
1277 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1278 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1279 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1280 if (!skb)
1281 return;
1282
1283 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1284
1285 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1286 memset(mgmt, 0, 24 + 6);
1287 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1288 IEEE80211_STYPE_AUTH);
1289 memcpy(mgmt->da, da, ETH_ALEN);
1290 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1291 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1292 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1293 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1294 mgmt->u.auth.status_code = cpu_to_le16(status);
1295 if (extra)
1296 memcpy(skb_put(skb, extra_len), extra, extra_len);
1297
1298 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1299 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1300 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1301 WARN_ON(err);
1302 }
1303
1304 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1305 tx_flags;
1306 ieee80211_tx_skb(sdata, skb);
1307 }
1308
1309 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1310 const u8 *bssid, u16 stype, u16 reason,
1311 bool send_frame, u8 *frame_buf)
1312 {
1313 struct ieee80211_local *local = sdata->local;
1314 struct sk_buff *skb;
1315 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1316
1317 /* build frame */
1318 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1319 mgmt->duration = 0; /* initialize only */
1320 mgmt->seq_ctrl = 0; /* initialize only */
1321 memcpy(mgmt->da, bssid, ETH_ALEN);
1322 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1323 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1324 /* u.deauth.reason_code == u.disassoc.reason_code */
1325 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1326
1327 if (send_frame) {
1328 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1329 IEEE80211_DEAUTH_FRAME_LEN);
1330 if (!skb)
1331 return;
1332
1333 skb_reserve(skb, local->hw.extra_tx_headroom);
1334
1335 /* copy in frame */
1336 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1337 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1338
1339 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1340 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1341 IEEE80211_SKB_CB(skb)->flags |=
1342 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1343
1344 ieee80211_tx_skb(sdata, skb);
1345 }
1346 }
1347
1348 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1349 u8 *buffer, size_t buffer_len,
1350 const u8 *ie, size_t ie_len,
1351 enum ieee80211_band band,
1352 u32 rate_mask,
1353 struct cfg80211_chan_def *chandef,
1354 size_t *offset)
1355 {
1356 struct ieee80211_supported_band *sband;
1357 u8 *pos = buffer, *end = buffer + buffer_len;
1358 size_t noffset;
1359 int supp_rates_len, i;
1360 u8 rates[32];
1361 int num_rates;
1362 int ext_rates_len;
1363 int shift;
1364 u32 rate_flags;
1365 bool have_80mhz = false;
1366
1367 *offset = 0;
1368
1369 sband = local->hw.wiphy->bands[band];
1370 if (WARN_ON_ONCE(!sband))
1371 return 0;
1372
1373 rate_flags = ieee80211_chandef_rate_flags(chandef);
1374 shift = ieee80211_chandef_get_shift(chandef);
1375
1376 num_rates = 0;
1377 for (i = 0; i < sband->n_bitrates; i++) {
1378 if ((BIT(i) & rate_mask) == 0)
1379 continue; /* skip rate */
1380 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1381 continue;
1382
1383 rates[num_rates++] =
1384 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1385 (1 << shift) * 5);
1386 }
1387
1388 supp_rates_len = min_t(int, num_rates, 8);
1389
1390 if (end - pos < 2 + supp_rates_len)
1391 goto out_err;
1392 *pos++ = WLAN_EID_SUPP_RATES;
1393 *pos++ = supp_rates_len;
1394 memcpy(pos, rates, supp_rates_len);
1395 pos += supp_rates_len;
1396
1397 /* insert "request information" if in custom IEs */
1398 if (ie && ie_len) {
1399 static const u8 before_extrates[] = {
1400 WLAN_EID_SSID,
1401 WLAN_EID_SUPP_RATES,
1402 WLAN_EID_REQUEST,
1403 };
1404 noffset = ieee80211_ie_split(ie, ie_len,
1405 before_extrates,
1406 ARRAY_SIZE(before_extrates),
1407 *offset);
1408 if (end - pos < noffset - *offset)
1409 goto out_err;
1410 memcpy(pos, ie + *offset, noffset - *offset);
1411 pos += noffset - *offset;
1412 *offset = noffset;
1413 }
1414
1415 ext_rates_len = num_rates - supp_rates_len;
1416 if (ext_rates_len > 0) {
1417 if (end - pos < 2 + ext_rates_len)
1418 goto out_err;
1419 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1420 *pos++ = ext_rates_len;
1421 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1422 pos += ext_rates_len;
1423 }
1424
1425 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1426 if (end - pos < 3)
1427 goto out_err;
1428 *pos++ = WLAN_EID_DS_PARAMS;
1429 *pos++ = 1;
1430 *pos++ = ieee80211_frequency_to_channel(
1431 chandef->chan->center_freq);
1432 }
1433
1434 /* insert custom IEs that go before HT */
1435 if (ie && ie_len) {
1436 static const u8 before_ht[] = {
1437 WLAN_EID_SSID,
1438 WLAN_EID_SUPP_RATES,
1439 WLAN_EID_REQUEST,
1440 WLAN_EID_EXT_SUPP_RATES,
1441 WLAN_EID_DS_PARAMS,
1442 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1443 };
1444 noffset = ieee80211_ie_split(ie, ie_len,
1445 before_ht, ARRAY_SIZE(before_ht),
1446 *offset);
1447 if (end - pos < noffset - *offset)
1448 goto out_err;
1449 memcpy(pos, ie + *offset, noffset - *offset);
1450 pos += noffset - *offset;
1451 *offset = noffset;
1452 }
1453
1454 if (sband->ht_cap.ht_supported) {
1455 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1456 goto out_err;
1457 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1458 sband->ht_cap.cap);
1459 }
1460
1461 /*
1462 * If adding more here, adjust code in main.c
1463 * that calculates local->scan_ies_len.
1464 */
1465
1466 /* insert custom IEs that go before VHT */
1467 if (ie && ie_len) {
1468 static const u8 before_vht[] = {
1469 WLAN_EID_SSID,
1470 WLAN_EID_SUPP_RATES,
1471 WLAN_EID_REQUEST,
1472 WLAN_EID_EXT_SUPP_RATES,
1473 WLAN_EID_DS_PARAMS,
1474 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1475 WLAN_EID_HT_CAPABILITY,
1476 WLAN_EID_BSS_COEX_2040,
1477 WLAN_EID_EXT_CAPABILITY,
1478 WLAN_EID_SSID_LIST,
1479 WLAN_EID_CHANNEL_USAGE,
1480 WLAN_EID_INTERWORKING,
1481 /* mesh ID can't happen here */
1482 /* 60 GHz can't happen here right now */
1483 };
1484 noffset = ieee80211_ie_split(ie, ie_len,
1485 before_vht, ARRAY_SIZE(before_vht),
1486 *offset);
1487 if (end - pos < noffset - *offset)
1488 goto out_err;
1489 memcpy(pos, ie + *offset, noffset - *offset);
1490 pos += noffset - *offset;
1491 *offset = noffset;
1492 }
1493
1494 /* Check if any channel in this sband supports at least 80 MHz */
1495 for (i = 0; i < sband->n_channels; i++) {
1496 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1497 IEEE80211_CHAN_NO_80MHZ))
1498 continue;
1499
1500 have_80mhz = true;
1501 break;
1502 }
1503
1504 if (sband->vht_cap.vht_supported && have_80mhz) {
1505 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1506 goto out_err;
1507 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1508 sband->vht_cap.cap);
1509 }
1510
1511 return pos - buffer;
1512 out_err:
1513 WARN_ONCE(1, "not enough space for preq IEs\n");
1514 return pos - buffer;
1515 }
1516
1517 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1518 size_t buffer_len,
1519 struct ieee80211_scan_ies *ie_desc,
1520 const u8 *ie, size_t ie_len,
1521 u8 bands_used, u32 *rate_masks,
1522 struct cfg80211_chan_def *chandef)
1523 {
1524 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1525 int i;
1526
1527 memset(ie_desc, 0, sizeof(*ie_desc));
1528
1529 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1530 if (bands_used & BIT(i)) {
1531 pos += ieee80211_build_preq_ies_band(local,
1532 buffer + pos,
1533 buffer_len - pos,
1534 ie, ie_len, i,
1535 rate_masks[i],
1536 chandef,
1537 &custom_ie_offset);
1538 ie_desc->ies[i] = buffer + old_pos;
1539 ie_desc->len[i] = pos - old_pos;
1540 old_pos = pos;
1541 }
1542 }
1543
1544 /* add any remaining custom IEs */
1545 if (ie && ie_len) {
1546 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1547 "not enough space for preq custom IEs\n"))
1548 return pos;
1549 memcpy(buffer + pos, ie + custom_ie_offset,
1550 ie_len - custom_ie_offset);
1551 ie_desc->common_ies = buffer + pos;
1552 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1553 pos += ie_len - custom_ie_offset;
1554 }
1555
1556 return pos;
1557 };
1558
1559 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1560 const u8 *src, const u8 *dst,
1561 u32 ratemask,
1562 struct ieee80211_channel *chan,
1563 const u8 *ssid, size_t ssid_len,
1564 const u8 *ie, size_t ie_len,
1565 bool directed)
1566 {
1567 struct ieee80211_local *local = sdata->local;
1568 struct cfg80211_chan_def chandef;
1569 struct sk_buff *skb;
1570 struct ieee80211_mgmt *mgmt;
1571 int ies_len;
1572 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1573 struct ieee80211_scan_ies dummy_ie_desc;
1574
1575 /*
1576 * Do not send DS Channel parameter for directed probe requests
1577 * in order to maximize the chance that we get a response. Some
1578 * badly-behaved APs don't respond when this parameter is included.
1579 */
1580 chandef.width = sdata->vif.bss_conf.chandef.width;
1581 if (directed)
1582 chandef.chan = NULL;
1583 else
1584 chandef.chan = chan;
1585
1586 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1587 100 + ie_len);
1588 if (!skb)
1589 return NULL;
1590
1591 rate_masks[chan->band] = ratemask;
1592 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1593 skb_tailroom(skb), &dummy_ie_desc,
1594 ie, ie_len, BIT(chan->band),
1595 rate_masks, &chandef);
1596 skb_put(skb, ies_len);
1597
1598 if (dst) {
1599 mgmt = (struct ieee80211_mgmt *) skb->data;
1600 memcpy(mgmt->da, dst, ETH_ALEN);
1601 memcpy(mgmt->bssid, dst, ETH_ALEN);
1602 }
1603
1604 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1605
1606 return skb;
1607 }
1608
1609 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1610 const u8 *src, const u8 *dst,
1611 const u8 *ssid, size_t ssid_len,
1612 const u8 *ie, size_t ie_len,
1613 u32 ratemask, bool directed, u32 tx_flags,
1614 struct ieee80211_channel *channel, bool scan)
1615 {
1616 struct sk_buff *skb;
1617
1618 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1619 ssid, ssid_len,
1620 ie, ie_len, directed);
1621 if (skb) {
1622 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1623 if (scan)
1624 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1625 else
1626 ieee80211_tx_skb(sdata, skb);
1627 }
1628 }
1629
1630 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1631 struct ieee802_11_elems *elems,
1632 enum ieee80211_band band, u32 *basic_rates)
1633 {
1634 struct ieee80211_supported_band *sband;
1635 size_t num_rates;
1636 u32 supp_rates, rate_flags;
1637 int i, j, shift;
1638 sband = sdata->local->hw.wiphy->bands[band];
1639
1640 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1641 shift = ieee80211_vif_get_shift(&sdata->vif);
1642
1643 if (WARN_ON(!sband))
1644 return 1;
1645
1646 num_rates = sband->n_bitrates;
1647 supp_rates = 0;
1648 for (i = 0; i < elems->supp_rates_len +
1649 elems->ext_supp_rates_len; i++) {
1650 u8 rate = 0;
1651 int own_rate;
1652 bool is_basic;
1653 if (i < elems->supp_rates_len)
1654 rate = elems->supp_rates[i];
1655 else if (elems->ext_supp_rates)
1656 rate = elems->ext_supp_rates
1657 [i - elems->supp_rates_len];
1658 own_rate = 5 * (rate & 0x7f);
1659 is_basic = !!(rate & 0x80);
1660
1661 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1662 continue;
1663
1664 for (j = 0; j < num_rates; j++) {
1665 int brate;
1666 if ((rate_flags & sband->bitrates[j].flags)
1667 != rate_flags)
1668 continue;
1669
1670 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1671 1 << shift);
1672
1673 if (brate == own_rate) {
1674 supp_rates |= BIT(j);
1675 if (basic_rates && is_basic)
1676 *basic_rates |= BIT(j);
1677 }
1678 }
1679 }
1680 return supp_rates;
1681 }
1682
1683 void ieee80211_stop_device(struct ieee80211_local *local)
1684 {
1685 ieee80211_led_radio(local, false);
1686 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1687
1688 cancel_work_sync(&local->reconfig_filter);
1689
1690 flush_workqueue(local->workqueue);
1691 drv_stop(local);
1692 }
1693
1694 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1695 {
1696 struct ieee80211_sub_if_data *sdata;
1697 struct ieee80211_chanctx *ctx;
1698
1699 /*
1700 * We get here if during resume the device can't be restarted properly.
1701 * We might also get here if this happens during HW reset, which is a
1702 * slightly different situation and we need to drop all connections in
1703 * the latter case.
1704 *
1705 * Ask cfg80211 to turn off all interfaces, this will result in more
1706 * warnings but at least we'll then get into a clean stopped state.
1707 */
1708
1709 local->resuming = false;
1710 local->suspended = false;
1711 local->started = false;
1712
1713 /* scheduled scan clearly can't be running any more, but tell
1714 * cfg80211 and clear local state
1715 */
1716 ieee80211_sched_scan_end(local);
1717
1718 list_for_each_entry(sdata, &local->interfaces, list)
1719 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1720
1721 /* Mark channel contexts as not being in the driver any more to avoid
1722 * removing them from the driver during the shutdown process...
1723 */
1724 mutex_lock(&local->chanctx_mtx);
1725 list_for_each_entry(ctx, &local->chanctx_list, list)
1726 ctx->driver_present = false;
1727 mutex_unlock(&local->chanctx_mtx);
1728
1729 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1730 }
1731
1732 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1733 struct ieee80211_sub_if_data *sdata)
1734 {
1735 struct ieee80211_chanctx_conf *conf;
1736 struct ieee80211_chanctx *ctx;
1737
1738 if (!local->use_chanctx)
1739 return;
1740
1741 mutex_lock(&local->chanctx_mtx);
1742 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1743 lockdep_is_held(&local->chanctx_mtx));
1744 if (conf) {
1745 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1746 drv_assign_vif_chanctx(local, sdata, ctx);
1747 }
1748 mutex_unlock(&local->chanctx_mtx);
1749 }
1750
1751 int ieee80211_reconfig(struct ieee80211_local *local)
1752 {
1753 struct ieee80211_hw *hw = &local->hw;
1754 struct ieee80211_sub_if_data *sdata;
1755 struct ieee80211_chanctx *ctx;
1756 struct sta_info *sta;
1757 int res, i;
1758 bool reconfig_due_to_wowlan = false;
1759 struct ieee80211_sub_if_data *sched_scan_sdata;
1760 struct cfg80211_sched_scan_request *sched_scan_req;
1761 bool sched_scan_stopped = false;
1762
1763 /* nothing to do if HW shouldn't run */
1764 if (!local->open_count)
1765 goto wake_up;
1766
1767 #ifdef CONFIG_PM
1768 if (local->suspended)
1769 local->resuming = true;
1770
1771 if (local->wowlan) {
1772 res = drv_resume(local);
1773 local->wowlan = false;
1774 if (res < 0) {
1775 local->resuming = false;
1776 return res;
1777 }
1778 if (res == 0)
1779 goto wake_up;
1780 WARN_ON(res > 1);
1781 /*
1782 * res is 1, which means the driver requested
1783 * to go through a regular reset on wakeup.
1784 */
1785 reconfig_due_to_wowlan = true;
1786 }
1787 #endif
1788
1789 /*
1790 * Upon resume hardware can sometimes be goofy due to
1791 * various platform / driver / bus issues, so restarting
1792 * the device may at times not work immediately. Propagate
1793 * the error.
1794 */
1795 res = drv_start(local);
1796 if (res) {
1797 if (local->suspended)
1798 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1799 else
1800 WARN(1, "Hardware became unavailable during restart.\n");
1801 ieee80211_handle_reconfig_failure(local);
1802 return res;
1803 }
1804
1805 /* setup fragmentation threshold */
1806 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1807
1808 /* setup RTS threshold */
1809 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1810
1811 /* reset coverage class */
1812 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1813
1814 ieee80211_led_radio(local, true);
1815 ieee80211_mod_tpt_led_trig(local,
1816 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1817
1818 /* add interfaces */
1819 sdata = rtnl_dereference(local->monitor_sdata);
1820 if (sdata) {
1821 /* in HW restart it exists already */
1822 WARN_ON(local->resuming);
1823 res = drv_add_interface(local, sdata);
1824 if (WARN_ON(res)) {
1825 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1826 synchronize_net();
1827 kfree(sdata);
1828 }
1829 }
1830
1831 list_for_each_entry(sdata, &local->interfaces, list) {
1832 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1833 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1834 ieee80211_sdata_running(sdata)) {
1835 res = drv_add_interface(local, sdata);
1836 if (WARN_ON(res))
1837 break;
1838 }
1839 }
1840
1841 /* If adding any of the interfaces failed above, roll back and
1842 * report failure.
1843 */
1844 if (res) {
1845 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1846 list)
1847 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1848 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1849 ieee80211_sdata_running(sdata))
1850 drv_remove_interface(local, sdata);
1851 ieee80211_handle_reconfig_failure(local);
1852 return res;
1853 }
1854
1855 /* add channel contexts */
1856 if (local->use_chanctx) {
1857 mutex_lock(&local->chanctx_mtx);
1858 list_for_each_entry(ctx, &local->chanctx_list, list)
1859 if (ctx->replace_state !=
1860 IEEE80211_CHANCTX_REPLACES_OTHER)
1861 WARN_ON(drv_add_chanctx(local, ctx));
1862 mutex_unlock(&local->chanctx_mtx);
1863
1864 list_for_each_entry(sdata, &local->interfaces, list) {
1865 if (!ieee80211_sdata_running(sdata))
1866 continue;
1867 ieee80211_assign_chanctx(local, sdata);
1868 }
1869
1870 sdata = rtnl_dereference(local->monitor_sdata);
1871 if (sdata && ieee80211_sdata_running(sdata))
1872 ieee80211_assign_chanctx(local, sdata);
1873 }
1874
1875 /* add STAs back */
1876 mutex_lock(&local->sta_mtx);
1877 list_for_each_entry(sta, &local->sta_list, list) {
1878 enum ieee80211_sta_state state;
1879
1880 if (!sta->uploaded)
1881 continue;
1882
1883 /* AP-mode stations will be added later */
1884 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1885 continue;
1886
1887 for (state = IEEE80211_STA_NOTEXIST;
1888 state < sta->sta_state; state++)
1889 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1890 state + 1));
1891 }
1892 mutex_unlock(&local->sta_mtx);
1893
1894 /* reconfigure tx conf */
1895 if (hw->queues >= IEEE80211_NUM_ACS) {
1896 list_for_each_entry(sdata, &local->interfaces, list) {
1897 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1898 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1899 !ieee80211_sdata_running(sdata))
1900 continue;
1901
1902 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1903 drv_conf_tx(local, sdata, i,
1904 &sdata->tx_conf[i]);
1905 }
1906 }
1907
1908 /* reconfigure hardware */
1909 ieee80211_hw_config(local, ~0);
1910
1911 ieee80211_configure_filter(local);
1912
1913 /* Finally also reconfigure all the BSS information */
1914 list_for_each_entry(sdata, &local->interfaces, list) {
1915 u32 changed;
1916
1917 if (!ieee80211_sdata_running(sdata))
1918 continue;
1919
1920 /* common change flags for all interface types */
1921 changed = BSS_CHANGED_ERP_CTS_PROT |
1922 BSS_CHANGED_ERP_PREAMBLE |
1923 BSS_CHANGED_ERP_SLOT |
1924 BSS_CHANGED_HT |
1925 BSS_CHANGED_BASIC_RATES |
1926 BSS_CHANGED_BEACON_INT |
1927 BSS_CHANGED_BSSID |
1928 BSS_CHANGED_CQM |
1929 BSS_CHANGED_QOS |
1930 BSS_CHANGED_IDLE |
1931 BSS_CHANGED_TXPOWER;
1932
1933 switch (sdata->vif.type) {
1934 case NL80211_IFTYPE_STATION:
1935 changed |= BSS_CHANGED_ASSOC |
1936 BSS_CHANGED_ARP_FILTER |
1937 BSS_CHANGED_PS;
1938
1939 /* Re-send beacon info report to the driver */
1940 if (sdata->u.mgd.have_beacon)
1941 changed |= BSS_CHANGED_BEACON_INFO;
1942
1943 sdata_lock(sdata);
1944 ieee80211_bss_info_change_notify(sdata, changed);
1945 sdata_unlock(sdata);
1946 break;
1947 case NL80211_IFTYPE_OCB:
1948 changed |= BSS_CHANGED_OCB;
1949 ieee80211_bss_info_change_notify(sdata, changed);
1950 break;
1951 case NL80211_IFTYPE_ADHOC:
1952 changed |= BSS_CHANGED_IBSS;
1953 /* fall through */
1954 case NL80211_IFTYPE_AP:
1955 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1956
1957 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1958 changed |= BSS_CHANGED_AP_PROBE_RESP;
1959
1960 if (rcu_access_pointer(sdata->u.ap.beacon))
1961 drv_start_ap(local, sdata);
1962 }
1963
1964 /* fall through */
1965 case NL80211_IFTYPE_MESH_POINT:
1966 if (sdata->vif.bss_conf.enable_beacon) {
1967 changed |= BSS_CHANGED_BEACON |
1968 BSS_CHANGED_BEACON_ENABLED;
1969 ieee80211_bss_info_change_notify(sdata, changed);
1970 }
1971 break;
1972 case NL80211_IFTYPE_WDS:
1973 case NL80211_IFTYPE_AP_VLAN:
1974 case NL80211_IFTYPE_MONITOR:
1975 case NL80211_IFTYPE_P2P_DEVICE:
1976 /* nothing to do */
1977 break;
1978 case NL80211_IFTYPE_UNSPECIFIED:
1979 case NUM_NL80211_IFTYPES:
1980 case NL80211_IFTYPE_P2P_CLIENT:
1981 case NL80211_IFTYPE_P2P_GO:
1982 WARN_ON(1);
1983 break;
1984 }
1985 }
1986
1987 ieee80211_recalc_ps(local, -1);
1988
1989 /*
1990 * The sta might be in psm against the ap (e.g. because
1991 * this was the state before a hw restart), so we
1992 * explicitly send a null packet in order to make sure
1993 * it'll sync against the ap (and get out of psm).
1994 */
1995 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1996 list_for_each_entry(sdata, &local->interfaces, list) {
1997 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1998 continue;
1999 if (!sdata->u.mgd.associated)
2000 continue;
2001
2002 ieee80211_send_nullfunc(local, sdata, 0);
2003 }
2004 }
2005
2006 /* APs are now beaconing, add back stations */
2007 mutex_lock(&local->sta_mtx);
2008 list_for_each_entry(sta, &local->sta_list, list) {
2009 enum ieee80211_sta_state state;
2010
2011 if (!sta->uploaded)
2012 continue;
2013
2014 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2015 continue;
2016
2017 for (state = IEEE80211_STA_NOTEXIST;
2018 state < sta->sta_state; state++)
2019 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2020 state + 1));
2021 }
2022 mutex_unlock(&local->sta_mtx);
2023
2024 /* add back keys */
2025 list_for_each_entry(sdata, &local->interfaces, list)
2026 ieee80211_reset_crypto_tx_tailroom(sdata);
2027
2028 list_for_each_entry(sdata, &local->interfaces, list)
2029 if (ieee80211_sdata_running(sdata))
2030 ieee80211_enable_keys(sdata);
2031
2032 wake_up:
2033 local->in_reconfig = false;
2034 barrier();
2035
2036 if (local->monitors == local->open_count && local->monitors > 0)
2037 ieee80211_add_virtual_monitor(local);
2038
2039 /*
2040 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2041 * sessions can be established after a resume.
2042 *
2043 * Also tear down aggregation sessions since reconfiguring
2044 * them in a hardware restart scenario is not easily done
2045 * right now, and the hardware will have lost information
2046 * about the sessions, but we and the AP still think they
2047 * are active. This is really a workaround though.
2048 */
2049 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2050 mutex_lock(&local->sta_mtx);
2051
2052 list_for_each_entry(sta, &local->sta_list, list) {
2053 ieee80211_sta_tear_down_BA_sessions(
2054 sta, AGG_STOP_LOCAL_REQUEST);
2055 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2056 }
2057
2058 mutex_unlock(&local->sta_mtx);
2059 }
2060
2061 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2062 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2063 false);
2064
2065 /*
2066 * Reconfigure sched scan if it was interrupted by FW restart or
2067 * suspend.
2068 */
2069 mutex_lock(&local->mtx);
2070 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2071 lockdep_is_held(&local->mtx));
2072 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2073 lockdep_is_held(&local->mtx));
2074 if (sched_scan_sdata && sched_scan_req)
2075 /*
2076 * Sched scan stopped, but we don't want to report it. Instead,
2077 * we're trying to reschedule.
2078 */
2079 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2080 sched_scan_req))
2081 sched_scan_stopped = true;
2082 mutex_unlock(&local->mtx);
2083
2084 if (sched_scan_stopped)
2085 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2086
2087 /*
2088 * If this is for hw restart things are still running.
2089 * We may want to change that later, however.
2090 */
2091 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2092 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2093
2094 if (!local->suspended)
2095 return 0;
2096
2097 #ifdef CONFIG_PM
2098 /* first set suspended false, then resuming */
2099 local->suspended = false;
2100 mb();
2101 local->resuming = false;
2102
2103 /* It's possible that we don't handle the scan completion in
2104 * time during suspend, so if it's still marked as completed
2105 * here, queue the work and flush it to clean things up.
2106 * Instead of calling the worker function directly here, we
2107 * really queue it to avoid potential races with other flows
2108 * scheduling the same work.
2109 */
2110 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2111 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2112 flush_delayed_work(&local->scan_work);
2113 }
2114
2115 if (local->open_count && !reconfig_due_to_wowlan)
2116 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2117
2118 list_for_each_entry(sdata, &local->interfaces, list) {
2119 if (!ieee80211_sdata_running(sdata))
2120 continue;
2121 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2122 ieee80211_sta_restart(sdata);
2123 }
2124
2125 mod_timer(&local->sta_cleanup, jiffies + 1);
2126 #else
2127 WARN_ON(1);
2128 #endif
2129
2130 return 0;
2131 }
2132
2133 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2134 {
2135 struct ieee80211_sub_if_data *sdata;
2136 struct ieee80211_local *local;
2137 struct ieee80211_key *key;
2138
2139 if (WARN_ON(!vif))
2140 return;
2141
2142 sdata = vif_to_sdata(vif);
2143 local = sdata->local;
2144
2145 if (WARN_ON(!local->resuming))
2146 return;
2147
2148 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2149 return;
2150
2151 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2152
2153 mutex_lock(&local->key_mtx);
2154 list_for_each_entry(key, &sdata->key_list, list)
2155 key->flags |= KEY_FLAG_TAINTED;
2156 mutex_unlock(&local->key_mtx);
2157 }
2158 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2159
2160 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2161 {
2162 struct ieee80211_local *local = sdata->local;
2163 struct ieee80211_chanctx_conf *chanctx_conf;
2164 struct ieee80211_chanctx *chanctx;
2165
2166 mutex_lock(&local->chanctx_mtx);
2167
2168 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2169 lockdep_is_held(&local->chanctx_mtx));
2170
2171 if (WARN_ON_ONCE(!chanctx_conf))
2172 goto unlock;
2173
2174 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2175 ieee80211_recalc_smps_chanctx(local, chanctx);
2176 unlock:
2177 mutex_unlock(&local->chanctx_mtx);
2178 }
2179
2180 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2181 {
2182 struct ieee80211_local *local = sdata->local;
2183 struct ieee80211_chanctx_conf *chanctx_conf;
2184 struct ieee80211_chanctx *chanctx;
2185
2186 mutex_lock(&local->chanctx_mtx);
2187
2188 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2189 lockdep_is_held(&local->chanctx_mtx));
2190
2191 if (WARN_ON_ONCE(!chanctx_conf))
2192 goto unlock;
2193
2194 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2195 ieee80211_recalc_chanctx_min_def(local, chanctx);
2196 unlock:
2197 mutex_unlock(&local->chanctx_mtx);
2198 }
2199
2200 size_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
2210 static 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
2228 void 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 }
2240 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2241
2242 void 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 }
2248 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2249
2250 u8 *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
2285 u8 *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
2306 u8 *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
2347 u8 *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
2382 void 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
2411 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2412 const struct ieee80211_vht_operation *oper,
2413 struct cfg80211_chan_def *chandef)
2414 {
2415 if (!oper)
2416 return;
2417
2418 chandef->chan = control_chan;
2419
2420 switch (oper->chan_width) {
2421 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2422 break;
2423 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2424 chandef->width = NL80211_CHAN_WIDTH_80;
2425 break;
2426 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2427 chandef->width = NL80211_CHAN_WIDTH_160;
2428 break;
2429 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2430 chandef->width = NL80211_CHAN_WIDTH_80P80;
2431 break;
2432 default:
2433 break;
2434 }
2435
2436 chandef->center_freq1 =
2437 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2438 control_chan->band);
2439 chandef->center_freq2 =
2440 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2441 control_chan->band);
2442 }
2443
2444 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2445 const struct ieee80211_supported_band *sband,
2446 const u8 *srates, int srates_len, u32 *rates)
2447 {
2448 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2449 int shift = ieee80211_chandef_get_shift(chandef);
2450 struct ieee80211_rate *br;
2451 int brate, rate, i, j, count = 0;
2452
2453 *rates = 0;
2454
2455 for (i = 0; i < srates_len; i++) {
2456 rate = srates[i] & 0x7f;
2457
2458 for (j = 0; j < sband->n_bitrates; j++) {
2459 br = &sband->bitrates[j];
2460 if ((rate_flags & br->flags) != rate_flags)
2461 continue;
2462
2463 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2464 if (brate == rate) {
2465 *rates |= BIT(j);
2466 count++;
2467 break;
2468 }
2469 }
2470 }
2471 return count;
2472 }
2473
2474 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2475 struct sk_buff *skb, bool need_basic,
2476 enum ieee80211_band band)
2477 {
2478 struct ieee80211_local *local = sdata->local;
2479 struct ieee80211_supported_band *sband;
2480 int rate, shift;
2481 u8 i, rates, *pos;
2482 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2483 u32 rate_flags;
2484
2485 shift = ieee80211_vif_get_shift(&sdata->vif);
2486 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2487 sband = local->hw.wiphy->bands[band];
2488 rates = 0;
2489 for (i = 0; i < sband->n_bitrates; i++) {
2490 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2491 continue;
2492 rates++;
2493 }
2494 if (rates > 8)
2495 rates = 8;
2496
2497 if (skb_tailroom(skb) < rates + 2)
2498 return -ENOMEM;
2499
2500 pos = skb_put(skb, rates + 2);
2501 *pos++ = WLAN_EID_SUPP_RATES;
2502 *pos++ = rates;
2503 for (i = 0; i < rates; i++) {
2504 u8 basic = 0;
2505 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2506 continue;
2507
2508 if (need_basic && basic_rates & BIT(i))
2509 basic = 0x80;
2510 rate = sband->bitrates[i].bitrate;
2511 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2512 5 * (1 << shift));
2513 *pos++ = basic | (u8) rate;
2514 }
2515
2516 return 0;
2517 }
2518
2519 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2520 struct sk_buff *skb, bool need_basic,
2521 enum ieee80211_band band)
2522 {
2523 struct ieee80211_local *local = sdata->local;
2524 struct ieee80211_supported_band *sband;
2525 int rate, shift;
2526 u8 i, exrates, *pos;
2527 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2528 u32 rate_flags;
2529
2530 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2531 shift = ieee80211_vif_get_shift(&sdata->vif);
2532
2533 sband = local->hw.wiphy->bands[band];
2534 exrates = 0;
2535 for (i = 0; i < sband->n_bitrates; i++) {
2536 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2537 continue;
2538 exrates++;
2539 }
2540
2541 if (exrates > 8)
2542 exrates -= 8;
2543 else
2544 exrates = 0;
2545
2546 if (skb_tailroom(skb) < exrates + 2)
2547 return -ENOMEM;
2548
2549 if (exrates) {
2550 pos = skb_put(skb, exrates + 2);
2551 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2552 *pos++ = exrates;
2553 for (i = 8; i < sband->n_bitrates; i++) {
2554 u8 basic = 0;
2555 if ((rate_flags & sband->bitrates[i].flags)
2556 != rate_flags)
2557 continue;
2558 if (need_basic && basic_rates & BIT(i))
2559 basic = 0x80;
2560 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2561 5 * (1 << shift));
2562 *pos++ = basic | (u8) rate;
2563 }
2564 }
2565 return 0;
2566 }
2567
2568 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2569 {
2570 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2571 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2572
2573 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2574 /* non-managed type inferfaces */
2575 return 0;
2576 }
2577 return ifmgd->ave_beacon_signal / 16;
2578 }
2579 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2580
2581 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2582 {
2583 if (!mcs)
2584 return 1;
2585
2586 /* TODO: consider rx_highest */
2587
2588 if (mcs->rx_mask[3])
2589 return 4;
2590 if (mcs->rx_mask[2])
2591 return 3;
2592 if (mcs->rx_mask[1])
2593 return 2;
2594 return 1;
2595 }
2596
2597 /**
2598 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2599 * @local: mac80211 hw info struct
2600 * @status: RX status
2601 * @mpdu_len: total MPDU length (including FCS)
2602 * @mpdu_offset: offset into MPDU to calculate timestamp at
2603 *
2604 * This function calculates the RX timestamp at the given MPDU offset, taking
2605 * into account what the RX timestamp was. An offset of 0 will just normalize
2606 * the timestamp to TSF at beginning of MPDU reception.
2607 */
2608 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2609 struct ieee80211_rx_status *status,
2610 unsigned int mpdu_len,
2611 unsigned int mpdu_offset)
2612 {
2613 u64 ts = status->mactime;
2614 struct rate_info ri;
2615 u16 rate;
2616
2617 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2618 return 0;
2619
2620 memset(&ri, 0, sizeof(ri));
2621
2622 /* Fill cfg80211 rate info */
2623 if (status->flag & RX_FLAG_HT) {
2624 ri.mcs = status->rate_idx;
2625 ri.flags |= RATE_INFO_FLAGS_MCS;
2626 if (status->flag & RX_FLAG_40MHZ)
2627 ri.bw = RATE_INFO_BW_40;
2628 else
2629 ri.bw = RATE_INFO_BW_20;
2630 if (status->flag & RX_FLAG_SHORT_GI)
2631 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2632 } else if (status->flag & RX_FLAG_VHT) {
2633 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2634 ri.mcs = status->rate_idx;
2635 ri.nss = status->vht_nss;
2636 if (status->flag & RX_FLAG_40MHZ)
2637 ri.bw = RATE_INFO_BW_40;
2638 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2639 ri.bw = RATE_INFO_BW_80;
2640 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2641 ri.bw = RATE_INFO_BW_160;
2642 else
2643 ri.bw = RATE_INFO_BW_20;
2644 if (status->flag & RX_FLAG_SHORT_GI)
2645 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2646 } else {
2647 struct ieee80211_supported_band *sband;
2648 int shift = 0;
2649 int bitrate;
2650
2651 if (status->flag & RX_FLAG_10MHZ) {
2652 shift = 1;
2653 ri.bw = RATE_INFO_BW_10;
2654 } else if (status->flag & RX_FLAG_5MHZ) {
2655 shift = 2;
2656 ri.bw = RATE_INFO_BW_5;
2657 } else {
2658 ri.bw = RATE_INFO_BW_20;
2659 }
2660
2661 sband = local->hw.wiphy->bands[status->band];
2662 bitrate = sband->bitrates[status->rate_idx].bitrate;
2663 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2664 }
2665
2666 rate = cfg80211_calculate_bitrate(&ri);
2667 if (WARN_ONCE(!rate,
2668 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2669 status->flag, status->rate_idx, status->vht_nss))
2670 return 0;
2671
2672 /* rewind from end of MPDU */
2673 if (status->flag & RX_FLAG_MACTIME_END)
2674 ts -= mpdu_len * 8 * 10 / rate;
2675
2676 ts += mpdu_offset * 8 * 10 / rate;
2677
2678 return ts;
2679 }
2680
2681 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2682 {
2683 struct ieee80211_sub_if_data *sdata;
2684 struct cfg80211_chan_def chandef;
2685
2686 mutex_lock(&local->mtx);
2687 mutex_lock(&local->iflist_mtx);
2688 list_for_each_entry(sdata, &local->interfaces, list) {
2689 /* it might be waiting for the local->mtx, but then
2690 * by the time it gets it, sdata->wdev.cac_started
2691 * will no longer be true
2692 */
2693 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2694
2695 if (sdata->wdev.cac_started) {
2696 chandef = sdata->vif.bss_conf.chandef;
2697 ieee80211_vif_release_channel(sdata);
2698 cfg80211_cac_event(sdata->dev,
2699 &chandef,
2700 NL80211_RADAR_CAC_ABORTED,
2701 GFP_KERNEL);
2702 }
2703 }
2704 mutex_unlock(&local->iflist_mtx);
2705 mutex_unlock(&local->mtx);
2706 }
2707
2708 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2709 {
2710 struct ieee80211_local *local =
2711 container_of(work, struct ieee80211_local, radar_detected_work);
2712 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2713 struct ieee80211_chanctx *ctx;
2714 int num_chanctx = 0;
2715
2716 mutex_lock(&local->chanctx_mtx);
2717 list_for_each_entry(ctx, &local->chanctx_list, list) {
2718 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2719 continue;
2720
2721 num_chanctx++;
2722 chandef = ctx->conf.def;
2723 }
2724 mutex_unlock(&local->chanctx_mtx);
2725
2726 ieee80211_dfs_cac_cancel(local);
2727
2728 if (num_chanctx > 1)
2729 /* XXX: multi-channel is not supported yet */
2730 WARN_ON(1);
2731 else
2732 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2733 }
2734
2735 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2736 {
2737 struct ieee80211_local *local = hw_to_local(hw);
2738
2739 trace_api_radar_detected(local);
2740
2741 ieee80211_queue_work(hw, &local->radar_detected_work);
2742 }
2743 EXPORT_SYMBOL(ieee80211_radar_detected);
2744
2745 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2746 {
2747 u32 ret;
2748 int tmp;
2749
2750 switch (c->width) {
2751 case NL80211_CHAN_WIDTH_20:
2752 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2753 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2754 break;
2755 case NL80211_CHAN_WIDTH_40:
2756 c->width = NL80211_CHAN_WIDTH_20;
2757 c->center_freq1 = c->chan->center_freq;
2758 ret = IEEE80211_STA_DISABLE_40MHZ |
2759 IEEE80211_STA_DISABLE_VHT;
2760 break;
2761 case NL80211_CHAN_WIDTH_80:
2762 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2763 /* n_P40 */
2764 tmp /= 2;
2765 /* freq_P40 */
2766 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2767 c->width = NL80211_CHAN_WIDTH_40;
2768 ret = IEEE80211_STA_DISABLE_VHT;
2769 break;
2770 case NL80211_CHAN_WIDTH_80P80:
2771 c->center_freq2 = 0;
2772 c->width = NL80211_CHAN_WIDTH_80;
2773 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2774 IEEE80211_STA_DISABLE_160MHZ;
2775 break;
2776 case NL80211_CHAN_WIDTH_160:
2777 /* n_P20 */
2778 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2779 /* n_P80 */
2780 tmp /= 4;
2781 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2782 c->width = NL80211_CHAN_WIDTH_80;
2783 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2784 IEEE80211_STA_DISABLE_160MHZ;
2785 break;
2786 default:
2787 case NL80211_CHAN_WIDTH_20_NOHT:
2788 WARN_ON_ONCE(1);
2789 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2790 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2791 break;
2792 case NL80211_CHAN_WIDTH_5:
2793 case NL80211_CHAN_WIDTH_10:
2794 WARN_ON_ONCE(1);
2795 /* keep c->width */
2796 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2797 break;
2798 }
2799
2800 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2801
2802 return ret;
2803 }
2804
2805 /*
2806 * Returns true if smps_mode_new is strictly more restrictive than
2807 * smps_mode_old.
2808 */
2809 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2810 enum ieee80211_smps_mode smps_mode_new)
2811 {
2812 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2813 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2814 return false;
2815
2816 switch (smps_mode_old) {
2817 case IEEE80211_SMPS_STATIC:
2818 return false;
2819 case IEEE80211_SMPS_DYNAMIC:
2820 return smps_mode_new == IEEE80211_SMPS_STATIC;
2821 case IEEE80211_SMPS_OFF:
2822 return smps_mode_new != IEEE80211_SMPS_OFF;
2823 default:
2824 WARN_ON(1);
2825 }
2826
2827 return false;
2828 }
2829
2830 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2831 struct cfg80211_csa_settings *csa_settings)
2832 {
2833 struct sk_buff *skb;
2834 struct ieee80211_mgmt *mgmt;
2835 struct ieee80211_local *local = sdata->local;
2836 int freq;
2837 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2838 sizeof(mgmt->u.action.u.chan_switch);
2839 u8 *pos;
2840
2841 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2842 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2843 return -EOPNOTSUPP;
2844
2845 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2846 5 + /* channel switch announcement element */
2847 3 + /* secondary channel offset element */
2848 8); /* mesh channel switch parameters element */
2849 if (!skb)
2850 return -ENOMEM;
2851
2852 skb_reserve(skb, local->tx_headroom);
2853 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2854 memset(mgmt, 0, hdr_len);
2855 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2856 IEEE80211_STYPE_ACTION);
2857
2858 eth_broadcast_addr(mgmt->da);
2859 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2860 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2861 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2862 } else {
2863 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2864 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2865 }
2866 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2867 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2868 pos = skb_put(skb, 5);
2869 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2870 *pos++ = 3; /* IE length */
2871 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2872 freq = csa_settings->chandef.chan->center_freq;
2873 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2874 *pos++ = csa_settings->count; /* count */
2875
2876 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2877 enum nl80211_channel_type ch_type;
2878
2879 skb_put(skb, 3);
2880 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2881 *pos++ = 1; /* IE length */
2882 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2883 if (ch_type == NL80211_CHAN_HT40PLUS)
2884 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2885 else
2886 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2887 }
2888
2889 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2890 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2891
2892 skb_put(skb, 8);
2893 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2894 *pos++ = 6; /* IE length */
2895 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2896 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2897 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2898 *pos++ |= csa_settings->block_tx ?
2899 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2900 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2901 pos += 2;
2902 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2903 pos += 2;
2904 }
2905
2906 ieee80211_tx_skb(sdata, skb);
2907 return 0;
2908 }
2909
2910 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2911 {
2912 return !(cs == NULL || cs->cipher == 0 ||
2913 cs->hdr_len < cs->pn_len + cs->pn_off ||
2914 cs->hdr_len <= cs->key_idx_off ||
2915 cs->key_idx_shift > 7 ||
2916 cs->key_idx_mask == 0);
2917 }
2918
2919 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2920 {
2921 int i;
2922
2923 /* Ensure we have enough iftype bitmap space for all iftype values */
2924 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2925
2926 for (i = 0; i < n; i++)
2927 if (!ieee80211_cs_valid(&cs[i]))
2928 return false;
2929
2930 return true;
2931 }
2932
2933 const struct ieee80211_cipher_scheme *
2934 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2935 enum nl80211_iftype iftype)
2936 {
2937 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2938 int n = local->hw.n_cipher_schemes;
2939 int i;
2940 const struct ieee80211_cipher_scheme *cs = NULL;
2941
2942 for (i = 0; i < n; i++) {
2943 if (l[i].cipher == cipher) {
2944 cs = &l[i];
2945 break;
2946 }
2947 }
2948
2949 if (!cs || !(cs->iftype & BIT(iftype)))
2950 return NULL;
2951
2952 return cs;
2953 }
2954
2955 int ieee80211_cs_headroom(struct ieee80211_local *local,
2956 struct cfg80211_crypto_settings *crypto,
2957 enum nl80211_iftype iftype)
2958 {
2959 const struct ieee80211_cipher_scheme *cs;
2960 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2961 int i;
2962
2963 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2964 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2965 iftype);
2966
2967 if (cs && headroom < cs->hdr_len)
2968 headroom = cs->hdr_len;
2969 }
2970
2971 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2972 if (cs && headroom < cs->hdr_len)
2973 headroom = cs->hdr_len;
2974
2975 return headroom;
2976 }
2977
2978 static bool
2979 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2980 {
2981 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2982 int skip;
2983
2984 if (end > 0)
2985 return false;
2986
2987 /* One shot NOA */
2988 if (data->count[i] == 1)
2989 return false;
2990
2991 if (data->desc[i].interval == 0)
2992 return false;
2993
2994 /* End time is in the past, check for repetitions */
2995 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2996 if (data->count[i] < 255) {
2997 if (data->count[i] <= skip) {
2998 data->count[i] = 0;
2999 return false;
3000 }
3001
3002 data->count[i] -= skip;
3003 }
3004
3005 data->desc[i].start += skip * data->desc[i].interval;
3006
3007 return true;
3008 }
3009
3010 static bool
3011 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3012 s32 *offset)
3013 {
3014 bool ret = false;
3015 int i;
3016
3017 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3018 s32 cur;
3019
3020 if (!data->count[i])
3021 continue;
3022
3023 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3024 ret = true;
3025
3026 cur = data->desc[i].start - tsf;
3027 if (cur > *offset)
3028 continue;
3029
3030 cur = data->desc[i].start + data->desc[i].duration - tsf;
3031 if (cur > *offset)
3032 *offset = cur;
3033 }
3034
3035 return ret;
3036 }
3037
3038 static u32
3039 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3040 {
3041 s32 offset = 0;
3042 int tries = 0;
3043 /*
3044 * arbitrary limit, used to avoid infinite loops when combined NoA
3045 * descriptors cover the full time period.
3046 */
3047 int max_tries = 5;
3048
3049 ieee80211_extend_absent_time(data, tsf, &offset);
3050 do {
3051 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3052 break;
3053
3054 tries++;
3055 } while (tries < max_tries);
3056
3057 return offset;
3058 }
3059
3060 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3061 {
3062 u32 next_offset = BIT(31) - 1;
3063 int i;
3064
3065 data->absent = 0;
3066 data->has_next_tsf = false;
3067 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3068 s32 start;
3069
3070 if (!data->count[i])
3071 continue;
3072
3073 ieee80211_extend_noa_desc(data, tsf, i);
3074 start = data->desc[i].start - tsf;
3075 if (start <= 0)
3076 data->absent |= BIT(i);
3077
3078 if (next_offset > start)
3079 next_offset = start;
3080
3081 data->has_next_tsf = true;
3082 }
3083
3084 if (data->absent)
3085 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3086
3087 data->next_tsf = tsf + next_offset;
3088 }
3089 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3090
3091 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3092 struct ieee80211_noa_data *data, u32 tsf)
3093 {
3094 int ret = 0;
3095 int i;
3096
3097 memset(data, 0, sizeof(*data));
3098
3099 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3100 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3101
3102 if (!desc->count || !desc->duration)
3103 continue;
3104
3105 data->count[i] = desc->count;
3106 data->desc[i].start = le32_to_cpu(desc->start_time);
3107 data->desc[i].duration = le32_to_cpu(desc->duration);
3108 data->desc[i].interval = le32_to_cpu(desc->interval);
3109
3110 if (data->count[i] > 1 &&
3111 data->desc[i].interval < data->desc[i].duration)
3112 continue;
3113
3114 ieee80211_extend_noa_desc(data, tsf, i);
3115 ret++;
3116 }
3117
3118 if (ret)
3119 ieee80211_update_p2p_noa(data, tsf);
3120
3121 return ret;
3122 }
3123 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3124
3125 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3126 struct ieee80211_sub_if_data *sdata)
3127 {
3128 u64 tsf = drv_get_tsf(local, sdata);
3129 u64 dtim_count = 0;
3130 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3131 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3132 struct ps_data *ps;
3133 u8 bcns_from_dtim;
3134
3135 if (tsf == -1ULL || !beacon_int || !dtim_period)
3136 return;
3137
3138 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3139 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3140 if (!sdata->bss)
3141 return;
3142
3143 ps = &sdata->bss->ps;
3144 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3145 ps = &sdata->u.mesh.ps;
3146 } else {
3147 return;
3148 }
3149
3150 /*
3151 * actually finds last dtim_count, mac80211 will update in
3152 * __beacon_add_tim().
3153 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3154 */
3155 do_div(tsf, beacon_int);
3156 bcns_from_dtim = do_div(tsf, dtim_period);
3157 /* just had a DTIM */
3158 if (!bcns_from_dtim)
3159 dtim_count = 0;
3160 else
3161 dtim_count = dtim_period - bcns_from_dtim;
3162
3163 ps->dtim_count = dtim_count;
3164 }
3165
3166 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3167 struct ieee80211_chanctx *ctx)
3168 {
3169 struct ieee80211_sub_if_data *sdata;
3170 u8 radar_detect = 0;
3171
3172 lockdep_assert_held(&local->chanctx_mtx);
3173
3174 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3175 return 0;
3176
3177 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3178 if (sdata->reserved_radar_required)
3179 radar_detect |= BIT(sdata->reserved_chandef.width);
3180
3181 /*
3182 * An in-place reservation context should not have any assigned vifs
3183 * until it replaces the other context.
3184 */
3185 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3186 !list_empty(&ctx->assigned_vifs));
3187
3188 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3189 if (sdata->radar_required)
3190 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3191
3192 return radar_detect;
3193 }
3194
3195 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3196 const struct cfg80211_chan_def *chandef,
3197 enum ieee80211_chanctx_mode chanmode,
3198 u8 radar_detect)
3199 {
3200 struct ieee80211_local *local = sdata->local;
3201 struct ieee80211_sub_if_data *sdata_iter;
3202 enum nl80211_iftype iftype = sdata->wdev.iftype;
3203 int num[NUM_NL80211_IFTYPES];
3204 struct ieee80211_chanctx *ctx;
3205 int num_different_channels = 0;
3206 int total = 1;
3207
3208 lockdep_assert_held(&local->chanctx_mtx);
3209
3210 if (WARN_ON(hweight32(radar_detect) > 1))
3211 return -EINVAL;
3212
3213 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3214 !chandef->chan))
3215 return -EINVAL;
3216
3217 if (chandef)
3218 num_different_channels = 1;
3219
3220 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3221 return -EINVAL;
3222
3223 /* Always allow software iftypes */
3224 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3225 if (radar_detect)
3226 return -EINVAL;
3227 return 0;
3228 }
3229
3230 memset(num, 0, sizeof(num));
3231
3232 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3233 num[iftype] = 1;
3234
3235 list_for_each_entry(ctx, &local->chanctx_list, list) {
3236 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3237 continue;
3238 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3239 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3240 num_different_channels++;
3241 continue;
3242 }
3243 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3244 cfg80211_chandef_compatible(chandef,
3245 &ctx->conf.def))
3246 continue;
3247 num_different_channels++;
3248 }
3249
3250 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3251 struct wireless_dev *wdev_iter;
3252
3253 wdev_iter = &sdata_iter->wdev;
3254
3255 if (sdata_iter == sdata ||
3256 !ieee80211_sdata_running(sdata_iter) ||
3257 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3258 continue;
3259
3260 num[wdev_iter->iftype]++;
3261 total++;
3262 }
3263
3264 if (total == 1 && !radar_detect)
3265 return 0;
3266
3267 return cfg80211_check_combinations(local->hw.wiphy,
3268 num_different_channels,
3269 radar_detect, num);
3270 }
3271
3272 static void
3273 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3274 void *data)
3275 {
3276 u32 *max_num_different_channels = data;
3277
3278 *max_num_different_channels = max(*max_num_different_channels,
3279 c->num_different_channels);
3280 }
3281
3282 int ieee80211_max_num_channels(struct ieee80211_local *local)
3283 {
3284 struct ieee80211_sub_if_data *sdata;
3285 int num[NUM_NL80211_IFTYPES] = {};
3286 struct ieee80211_chanctx *ctx;
3287 int num_different_channels = 0;
3288 u8 radar_detect = 0;
3289 u32 max_num_different_channels = 1;
3290 int err;
3291
3292 lockdep_assert_held(&local->chanctx_mtx);
3293
3294 list_for_each_entry(ctx, &local->chanctx_list, list) {
3295 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3296 continue;
3297
3298 num_different_channels++;
3299
3300 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3301 }
3302
3303 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3304 num[sdata->wdev.iftype]++;
3305
3306 err = cfg80211_iter_combinations(local->hw.wiphy,
3307 num_different_channels, radar_detect,
3308 num, ieee80211_iter_max_chans,
3309 &max_num_different_channels);
3310 if (err < 0)
3311 return err;
3312
3313 return max_num_different_channels;
3314 }
3315
3316 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3317 {
3318 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3319 *buf++ = 7; /* len */
3320 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3321 *buf++ = 0x50;
3322 *buf++ = 0xf2;
3323 *buf++ = 2; /* WME */
3324 *buf++ = 0; /* WME info */
3325 *buf++ = 1; /* WME ver */
3326 *buf++ = qosinfo; /* U-APSD no in use */
3327
3328 return buf;
3329 }
3330
3331 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3332 struct sta_info *sta,
3333 struct txq_info *txqi, int tid)
3334 {
3335 skb_queue_head_init(&txqi->queue);
3336 txqi->txq.vif = &sdata->vif;
3337
3338 if (sta) {
3339 txqi->txq.sta = &sta->sta;
3340 sta->sta.txq[tid] = &txqi->txq;
3341 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3342 } else {
3343 sdata->vif.txq = &txqi->txq;
3344 txqi->txq.ac = IEEE80211_AC_BE;
3345 }
3346 }
Linux with added FPC-III support