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mac80211: fix unnecessary frame drops in mesh fwding
[deliverable/linux.git] / net / mac80211 / util.c
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015 Intel Deutschland GmbH
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * utilities for mac80211
14 */
15
16 #include <net/mac80211.h>
17 #include <linux/netdevice.h>
18 #include <linux/export.h>
19 #include <linux/types.h>
20 #include <linux/slab.h>
21 #include <linux/skbuff.h>
22 #include <linux/etherdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/bitmap.h>
25 #include <linux/crc32.h>
26 #include <net/net_namespace.h>
27 #include <net/cfg80211.h>
28 #include <net/rtnetlink.h>
29
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
32 #include "rate.h"
33 #include "mesh.h"
34 #include "wme.h"
35 #include "led.h"
36 #include "wep.h"
37
38 /* privid for wiphys to determine whether they belong to us or not */
39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
40
41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
42 {
43 struct ieee80211_local *local;
44 BUG_ON(!wiphy);
45
46 local = wiphy_priv(wiphy);
47 return &local->hw;
48 }
49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
50
51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
52 {
53 struct sk_buff *skb;
54 struct ieee80211_hdr *hdr;
55
56 skb_queue_walk(&tx->skbs, skb) {
57 hdr = (struct ieee80211_hdr *) skb->data;
58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
59 }
60 }
61
62 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
63 int rate, int erp, int short_preamble,
64 int shift)
65 {
66 int dur;
67
68 /* calculate duration (in microseconds, rounded up to next higher
69 * integer if it includes a fractional microsecond) to send frame of
70 * len bytes (does not include FCS) at the given rate. Duration will
71 * also include SIFS.
72 *
73 * rate is in 100 kbps, so divident is multiplied by 10 in the
74 * DIV_ROUND_UP() operations.
75 *
76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
77 * is assumed to be 0 otherwise.
78 */
79
80 if (band == IEEE80211_BAND_5GHZ || erp) {
81 /*
82 * OFDM:
83 *
84 * N_DBPS = DATARATE x 4
85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
86 * (16 = SIGNAL time, 6 = tail bits)
87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
88 *
89 * T_SYM = 4 usec
90 * 802.11a - 18.5.2: aSIFSTime = 16 usec
91 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
92 * signal ext = 6 usec
93 */
94 dur = 16; /* SIFS + signal ext */
95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
97
98 /* IEEE 802.11-2012 18.3.2.4: all values above are:
99 * * times 4 for 5 MHz
100 * * times 2 for 10 MHz
101 */
102 dur *= 1 << shift;
103
104 /* rates should already consider the channel bandwidth,
105 * don't apply divisor again.
106 */
107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
108 4 * rate); /* T_SYM x N_SYM */
109 } else {
110 /*
111 * 802.11b or 802.11g with 802.11b compatibility:
112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
114 *
115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
116 * aSIFSTime = 10 usec
117 * aPreambleLength = 144 usec or 72 usec with short preamble
118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
119 */
120 dur = 10; /* aSIFSTime = 10 usec */
121 dur += short_preamble ? (72 + 24) : (144 + 48);
122
123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
124 }
125
126 return dur;
127 }
128
129 /* Exported duration function for driver use */
130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
131 struct ieee80211_vif *vif,
132 enum ieee80211_band band,
133 size_t frame_len,
134 struct ieee80211_rate *rate)
135 {
136 struct ieee80211_sub_if_data *sdata;
137 u16 dur;
138 int erp, shift = 0;
139 bool short_preamble = false;
140
141 erp = 0;
142 if (vif) {
143 sdata = vif_to_sdata(vif);
144 short_preamble = sdata->vif.bss_conf.use_short_preamble;
145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
146 erp = rate->flags & IEEE80211_RATE_ERP_G;
147 shift = ieee80211_vif_get_shift(vif);
148 }
149
150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
151 short_preamble, shift);
152
153 return cpu_to_le16(dur);
154 }
155 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
156
157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
158 struct ieee80211_vif *vif, size_t frame_len,
159 const struct ieee80211_tx_info *frame_txctl)
160 {
161 struct ieee80211_local *local = hw_to_local(hw);
162 struct ieee80211_rate *rate;
163 struct ieee80211_sub_if_data *sdata;
164 bool short_preamble;
165 int erp, shift = 0, bitrate;
166 u16 dur;
167 struct ieee80211_supported_band *sband;
168
169 sband = local->hw.wiphy->bands[frame_txctl->band];
170
171 short_preamble = false;
172
173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
174
175 erp = 0;
176 if (vif) {
177 sdata = vif_to_sdata(vif);
178 short_preamble = sdata->vif.bss_conf.use_short_preamble;
179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
180 erp = rate->flags & IEEE80211_RATE_ERP_G;
181 shift = ieee80211_vif_get_shift(vif);
182 }
183
184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
185
186 /* CTS duration */
187 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
188 erp, short_preamble, shift);
189 /* Data frame duration */
190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
191 erp, short_preamble, shift);
192 /* ACK duration */
193 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
194 erp, short_preamble, shift);
195
196 return cpu_to_le16(dur);
197 }
198 EXPORT_SYMBOL(ieee80211_rts_duration);
199
200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
201 struct ieee80211_vif *vif,
202 size_t frame_len,
203 const struct ieee80211_tx_info *frame_txctl)
204 {
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
208 bool short_preamble;
209 int erp, shift = 0, bitrate;
210 u16 dur;
211 struct ieee80211_supported_band *sband;
212
213 sband = local->hw.wiphy->bands[frame_txctl->band];
214
215 short_preamble = false;
216
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
218 erp = 0;
219 if (vif) {
220 sdata = vif_to_sdata(vif);
221 short_preamble = sdata->vif.bss_conf.use_short_preamble;
222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
223 erp = rate->flags & IEEE80211_RATE_ERP_G;
224 shift = ieee80211_vif_get_shift(vif);
225 }
226
227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
228
229 /* Data frame duration */
230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
231 erp, short_preamble, shift);
232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
233 /* ACK duration */
234 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 }
237
238 return cpu_to_le16(dur);
239 }
240 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
241
242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
243 {
244 struct ieee80211_sub_if_data *sdata;
245 int n_acs = IEEE80211_NUM_ACS;
246
247 if (local->hw.queues < IEEE80211_NUM_ACS)
248 n_acs = 1;
249
250 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
251 int ac;
252
253 if (!sdata->dev)
254 continue;
255
256 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
257 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
258 continue;
259
260 for (ac = 0; ac < n_acs; ac++) {
261 int ac_queue = sdata->vif.hw_queue[ac];
262
263 if (local->ops->wake_tx_queue &&
264 (atomic_read(&sdata->txqs_len[ac]) >
265 local->hw.txq_ac_max_pending))
266 continue;
267
268 if (ac_queue == queue ||
269 (sdata->vif.cab_queue == queue &&
270 local->queue_stop_reasons[ac_queue] == 0 &&
271 skb_queue_empty(&local->pending[ac_queue])))
272 netif_wake_subqueue(sdata->dev, ac);
273 }
274 }
275 }
276
277 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
278 enum queue_stop_reason reason,
279 bool refcounted)
280 {
281 struct ieee80211_local *local = hw_to_local(hw);
282
283 trace_wake_queue(local, queue, reason);
284
285 if (WARN_ON(queue >= hw->queues))
286 return;
287
288 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
289 return;
290
291 if (!refcounted) {
292 local->q_stop_reasons[queue][reason] = 0;
293 } else {
294 local->q_stop_reasons[queue][reason]--;
295 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
296 local->q_stop_reasons[queue][reason] = 0;
297 }
298
299 if (local->q_stop_reasons[queue][reason] == 0)
300 __clear_bit(reason, &local->queue_stop_reasons[queue]);
301
302 if (local->queue_stop_reasons[queue] != 0)
303 /* someone still has this queue stopped */
304 return;
305
306 if (skb_queue_empty(&local->pending[queue])) {
307 rcu_read_lock();
308 ieee80211_propagate_queue_wake(local, queue);
309 rcu_read_unlock();
310 } else
311 tasklet_schedule(&local->tx_pending_tasklet);
312 }
313
314 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
315 enum queue_stop_reason reason,
316 bool refcounted)
317 {
318 struct ieee80211_local *local = hw_to_local(hw);
319 unsigned long flags;
320
321 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
322 __ieee80211_wake_queue(hw, queue, reason, refcounted);
323 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
324 }
325
326 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
327 {
328 ieee80211_wake_queue_by_reason(hw, queue,
329 IEEE80211_QUEUE_STOP_REASON_DRIVER,
330 false);
331 }
332 EXPORT_SYMBOL(ieee80211_wake_queue);
333
334 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
335 enum queue_stop_reason reason,
336 bool refcounted)
337 {
338 struct ieee80211_local *local = hw_to_local(hw);
339 struct ieee80211_sub_if_data *sdata;
340 int n_acs = IEEE80211_NUM_ACS;
341
342 trace_stop_queue(local, queue, reason);
343
344 if (WARN_ON(queue >= hw->queues))
345 return;
346
347 if (!refcounted)
348 local->q_stop_reasons[queue][reason] = 1;
349 else
350 local->q_stop_reasons[queue][reason]++;
351
352 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
353 return;
354
355 if (local->hw.queues < IEEE80211_NUM_ACS)
356 n_acs = 1;
357
358 rcu_read_lock();
359 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
360 int ac;
361
362 if (!sdata->dev)
363 continue;
364
365 for (ac = 0; ac < n_acs; ac++) {
366 if (sdata->vif.hw_queue[ac] == queue ||
367 sdata->vif.cab_queue == queue)
368 netif_stop_subqueue(sdata->dev, ac);
369 }
370 }
371 rcu_read_unlock();
372 }
373
374 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
375 enum queue_stop_reason reason,
376 bool refcounted)
377 {
378 struct ieee80211_local *local = hw_to_local(hw);
379 unsigned long flags;
380
381 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
382 __ieee80211_stop_queue(hw, queue, reason, refcounted);
383 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
384 }
385
386 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
387 {
388 ieee80211_stop_queue_by_reason(hw, queue,
389 IEEE80211_QUEUE_STOP_REASON_DRIVER,
390 false);
391 }
392 EXPORT_SYMBOL(ieee80211_stop_queue);
393
394 void ieee80211_add_pending_skb(struct ieee80211_local *local,
395 struct sk_buff *skb)
396 {
397 struct ieee80211_hw *hw = &local->hw;
398 unsigned long flags;
399 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
400 int queue = info->hw_queue;
401
402 if (WARN_ON(!info->control.vif)) {
403 ieee80211_free_txskb(&local->hw, skb);
404 return;
405 }
406
407 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
408 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
409 false);
410 __skb_queue_tail(&local->pending[queue], skb);
411 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
412 false);
413 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
414 }
415
416 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
417 struct sk_buff_head *skbs)
418 {
419 struct ieee80211_hw *hw = &local->hw;
420 struct sk_buff *skb;
421 unsigned long flags;
422 int queue, i;
423
424 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
425 while ((skb = skb_dequeue(skbs))) {
426 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
427
428 if (WARN_ON(!info->control.vif)) {
429 ieee80211_free_txskb(&local->hw, skb);
430 continue;
431 }
432
433 queue = info->hw_queue;
434
435 __ieee80211_stop_queue(hw, queue,
436 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
437 false);
438
439 __skb_queue_tail(&local->pending[queue], skb);
440 }
441
442 for (i = 0; i < hw->queues; i++)
443 __ieee80211_wake_queue(hw, i,
444 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
445 false);
446 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
447 }
448
449 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
450 unsigned long queues,
451 enum queue_stop_reason reason,
452 bool refcounted)
453 {
454 struct ieee80211_local *local = hw_to_local(hw);
455 unsigned long flags;
456 int i;
457
458 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
459
460 for_each_set_bit(i, &queues, hw->queues)
461 __ieee80211_stop_queue(hw, i, reason, refcounted);
462
463 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
464 }
465
466 void ieee80211_stop_queues(struct ieee80211_hw *hw)
467 {
468 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
469 IEEE80211_QUEUE_STOP_REASON_DRIVER,
470 false);
471 }
472 EXPORT_SYMBOL(ieee80211_stop_queues);
473
474 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
475 {
476 struct ieee80211_local *local = hw_to_local(hw);
477 unsigned long flags;
478 int ret;
479
480 if (WARN_ON(queue >= hw->queues))
481 return true;
482
483 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
484 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
485 &local->queue_stop_reasons[queue]);
486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
487 return ret;
488 }
489 EXPORT_SYMBOL(ieee80211_queue_stopped);
490
491 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
492 unsigned long queues,
493 enum queue_stop_reason reason,
494 bool refcounted)
495 {
496 struct ieee80211_local *local = hw_to_local(hw);
497 unsigned long flags;
498 int i;
499
500 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
501
502 for_each_set_bit(i, &queues, hw->queues)
503 __ieee80211_wake_queue(hw, i, reason, refcounted);
504
505 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
506 }
507
508 void ieee80211_wake_queues(struct ieee80211_hw *hw)
509 {
510 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
511 IEEE80211_QUEUE_STOP_REASON_DRIVER,
512 false);
513 }
514 EXPORT_SYMBOL(ieee80211_wake_queues);
515
516 static unsigned int
517 ieee80211_get_vif_queues(struct ieee80211_local *local,
518 struct ieee80211_sub_if_data *sdata)
519 {
520 unsigned int queues;
521
522 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
523 int ac;
524
525 queues = 0;
526
527 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
528 queues |= BIT(sdata->vif.hw_queue[ac]);
529 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
530 queues |= BIT(sdata->vif.cab_queue);
531 } else {
532 /* all queues */
533 queues = BIT(local->hw.queues) - 1;
534 }
535
536 return queues;
537 }
538
539 void __ieee80211_flush_queues(struct ieee80211_local *local,
540 struct ieee80211_sub_if_data *sdata,
541 unsigned int queues, bool drop)
542 {
543 if (!local->ops->flush)
544 return;
545
546 /*
547 * If no queue was set, or if the HW doesn't support
548 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
549 */
550 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
551 queues = ieee80211_get_vif_queues(local, sdata);
552
553 ieee80211_stop_queues_by_reason(&local->hw, queues,
554 IEEE80211_QUEUE_STOP_REASON_FLUSH,
555 false);
556
557 drv_flush(local, sdata, queues, drop);
558
559 ieee80211_wake_queues_by_reason(&local->hw, queues,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH,
561 false);
562 }
563
564 void ieee80211_flush_queues(struct ieee80211_local *local,
565 struct ieee80211_sub_if_data *sdata, bool drop)
566 {
567 __ieee80211_flush_queues(local, sdata, 0, drop);
568 }
569
570 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
571 struct ieee80211_sub_if_data *sdata,
572 enum queue_stop_reason reason)
573 {
574 ieee80211_stop_queues_by_reason(&local->hw,
575 ieee80211_get_vif_queues(local, sdata),
576 reason, true);
577 }
578
579 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
581 enum queue_stop_reason reason)
582 {
583 ieee80211_wake_queues_by_reason(&local->hw,
584 ieee80211_get_vif_queues(local, sdata),
585 reason, true);
586 }
587
588 static void __iterate_interfaces(struct ieee80211_local *local,
589 u32 iter_flags,
590 void (*iterator)(void *data, u8 *mac,
591 struct ieee80211_vif *vif),
592 void *data)
593 {
594 struct ieee80211_sub_if_data *sdata;
595 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
596
597 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
598 switch (sdata->vif.type) {
599 case NL80211_IFTYPE_MONITOR:
600 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
601 continue;
602 break;
603 case NL80211_IFTYPE_AP_VLAN:
604 continue;
605 default:
606 break;
607 }
608 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
609 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
610 continue;
611 if (ieee80211_sdata_running(sdata) || !active_only)
612 iterator(data, sdata->vif.addr,
613 &sdata->vif);
614 }
615
616 sdata = rcu_dereference_check(local->monitor_sdata,
617 lockdep_is_held(&local->iflist_mtx) ||
618 lockdep_rtnl_is_held());
619 if (sdata &&
620 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
621 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
622 iterator(data, sdata->vif.addr, &sdata->vif);
623 }
624
625 void ieee80211_iterate_interfaces(
626 struct ieee80211_hw *hw, u32 iter_flags,
627 void (*iterator)(void *data, u8 *mac,
628 struct ieee80211_vif *vif),
629 void *data)
630 {
631 struct ieee80211_local *local = hw_to_local(hw);
632
633 mutex_lock(&local->iflist_mtx);
634 __iterate_interfaces(local, iter_flags, iterator, data);
635 mutex_unlock(&local->iflist_mtx);
636 }
637 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
638
639 void ieee80211_iterate_active_interfaces_atomic(
640 struct ieee80211_hw *hw, u32 iter_flags,
641 void (*iterator)(void *data, u8 *mac,
642 struct ieee80211_vif *vif),
643 void *data)
644 {
645 struct ieee80211_local *local = hw_to_local(hw);
646
647 rcu_read_lock();
648 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
649 iterator, data);
650 rcu_read_unlock();
651 }
652 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
653
654 void ieee80211_iterate_active_interfaces_rtnl(
655 struct ieee80211_hw *hw, u32 iter_flags,
656 void (*iterator)(void *data, u8 *mac,
657 struct ieee80211_vif *vif),
658 void *data)
659 {
660 struct ieee80211_local *local = hw_to_local(hw);
661
662 ASSERT_RTNL();
663
664 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
665 iterator, data);
666 }
667 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
668
669 static void __iterate_stations(struct ieee80211_local *local,
670 void (*iterator)(void *data,
671 struct ieee80211_sta *sta),
672 void *data)
673 {
674 struct sta_info *sta;
675
676 list_for_each_entry_rcu(sta, &local->sta_list, list) {
677 if (!sta->uploaded)
678 continue;
679
680 iterator(data, &sta->sta);
681 }
682 }
683
684 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
685 void (*iterator)(void *data,
686 struct ieee80211_sta *sta),
687 void *data)
688 {
689 struct ieee80211_local *local = hw_to_local(hw);
690
691 rcu_read_lock();
692 __iterate_stations(local, iterator, data);
693 rcu_read_unlock();
694 }
695 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
696
697 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
698 {
699 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
700
701 if (!ieee80211_sdata_running(sdata) ||
702 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
703 return NULL;
704 return &sdata->vif;
705 }
706 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
707
708 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
709 {
710 struct ieee80211_sub_if_data *sdata;
711
712 if (!vif)
713 return NULL;
714
715 sdata = vif_to_sdata(vif);
716
717 if (!ieee80211_sdata_running(sdata) ||
718 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
719 return NULL;
720
721 return &sdata->wdev;
722 }
723 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
724
725 /*
726 * Nothing should have been stuffed into the workqueue during
727 * the suspend->resume cycle. Since we can't check each caller
728 * of this function if we are already quiescing / suspended,
729 * check here and don't WARN since this can actually happen when
730 * the rx path (for example) is racing against __ieee80211_suspend
731 * and suspending / quiescing was set after the rx path checked
732 * them.
733 */
734 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
735 {
736 if (local->quiescing || (local->suspended && !local->resuming)) {
737 pr_warn("queueing ieee80211 work while going to suspend\n");
738 return false;
739 }
740
741 return true;
742 }
743
744 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
745 {
746 struct ieee80211_local *local = hw_to_local(hw);
747
748 if (!ieee80211_can_queue_work(local))
749 return;
750
751 queue_work(local->workqueue, work);
752 }
753 EXPORT_SYMBOL(ieee80211_queue_work);
754
755 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
756 struct delayed_work *dwork,
757 unsigned long delay)
758 {
759 struct ieee80211_local *local = hw_to_local(hw);
760
761 if (!ieee80211_can_queue_work(local))
762 return;
763
764 queue_delayed_work(local->workqueue, dwork, delay);
765 }
766 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
767
768 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
769 struct ieee802_11_elems *elems,
770 u64 filter, u32 crc)
771 {
772 size_t left = len;
773 const u8 *pos = start;
774 bool calc_crc = filter != 0;
775 DECLARE_BITMAP(seen_elems, 256);
776 const u8 *ie;
777
778 bitmap_zero(seen_elems, 256);
779 memset(elems, 0, sizeof(*elems));
780 elems->ie_start = start;
781 elems->total_len = len;
782
783 while (left >= 2) {
784 u8 id, elen;
785 bool elem_parse_failed;
786
787 id = *pos++;
788 elen = *pos++;
789 left -= 2;
790
791 if (elen > left) {
792 elems->parse_error = true;
793 break;
794 }
795
796 switch (id) {
797 case WLAN_EID_SSID:
798 case WLAN_EID_SUPP_RATES:
799 case WLAN_EID_FH_PARAMS:
800 case WLAN_EID_DS_PARAMS:
801 case WLAN_EID_CF_PARAMS:
802 case WLAN_EID_TIM:
803 case WLAN_EID_IBSS_PARAMS:
804 case WLAN_EID_CHALLENGE:
805 case WLAN_EID_RSN:
806 case WLAN_EID_ERP_INFO:
807 case WLAN_EID_EXT_SUPP_RATES:
808 case WLAN_EID_HT_CAPABILITY:
809 case WLAN_EID_HT_OPERATION:
810 case WLAN_EID_VHT_CAPABILITY:
811 case WLAN_EID_VHT_OPERATION:
812 case WLAN_EID_MESH_ID:
813 case WLAN_EID_MESH_CONFIG:
814 case WLAN_EID_PEER_MGMT:
815 case WLAN_EID_PREQ:
816 case WLAN_EID_PREP:
817 case WLAN_EID_PERR:
818 case WLAN_EID_RANN:
819 case WLAN_EID_CHANNEL_SWITCH:
820 case WLAN_EID_EXT_CHANSWITCH_ANN:
821 case WLAN_EID_COUNTRY:
822 case WLAN_EID_PWR_CONSTRAINT:
823 case WLAN_EID_TIMEOUT_INTERVAL:
824 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
825 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
826 case WLAN_EID_CHAN_SWITCH_PARAM:
827 case WLAN_EID_EXT_CAPABILITY:
828 case WLAN_EID_CHAN_SWITCH_TIMING:
829 case WLAN_EID_LINK_ID:
830 /*
831 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
832 * that if the content gets bigger it might be needed more than once
833 */
834 if (test_bit(id, seen_elems)) {
835 elems->parse_error = true;
836 left -= elen;
837 pos += elen;
838 continue;
839 }
840 break;
841 }
842
843 if (calc_crc && id < 64 && (filter & (1ULL << id)))
844 crc = crc32_be(crc, pos - 2, elen + 2);
845
846 elem_parse_failed = false;
847
848 switch (id) {
849 case WLAN_EID_LINK_ID:
850 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
851 elem_parse_failed = true;
852 break;
853 }
854 elems->lnk_id = (void *)(pos - 2);
855 break;
856 case WLAN_EID_CHAN_SWITCH_TIMING:
857 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
858 elem_parse_failed = true;
859 break;
860 }
861 elems->ch_sw_timing = (void *)pos;
862 break;
863 case WLAN_EID_EXT_CAPABILITY:
864 elems->ext_capab = pos;
865 elems->ext_capab_len = elen;
866 break;
867 case WLAN_EID_SSID:
868 elems->ssid = pos;
869 elems->ssid_len = elen;
870 break;
871 case WLAN_EID_SUPP_RATES:
872 elems->supp_rates = pos;
873 elems->supp_rates_len = elen;
874 break;
875 case WLAN_EID_DS_PARAMS:
876 if (elen >= 1)
877 elems->ds_params = pos;
878 else
879 elem_parse_failed = true;
880 break;
881 case WLAN_EID_TIM:
882 if (elen >= sizeof(struct ieee80211_tim_ie)) {
883 elems->tim = (void *)pos;
884 elems->tim_len = elen;
885 } else
886 elem_parse_failed = true;
887 break;
888 case WLAN_EID_CHALLENGE:
889 elems->challenge = pos;
890 elems->challenge_len = elen;
891 break;
892 case WLAN_EID_VENDOR_SPECIFIC:
893 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
894 pos[2] == 0xf2) {
895 /* Microsoft OUI (00:50:F2) */
896
897 if (calc_crc)
898 crc = crc32_be(crc, pos - 2, elen + 2);
899
900 if (elen >= 5 && pos[3] == 2) {
901 /* OUI Type 2 - WMM IE */
902 if (pos[4] == 0) {
903 elems->wmm_info = pos;
904 elems->wmm_info_len = elen;
905 } else if (pos[4] == 1) {
906 elems->wmm_param = pos;
907 elems->wmm_param_len = elen;
908 }
909 }
910 }
911 break;
912 case WLAN_EID_RSN:
913 elems->rsn = pos;
914 elems->rsn_len = elen;
915 break;
916 case WLAN_EID_ERP_INFO:
917 if (elen >= 1)
918 elems->erp_info = pos;
919 else
920 elem_parse_failed = true;
921 break;
922 case WLAN_EID_EXT_SUPP_RATES:
923 elems->ext_supp_rates = pos;
924 elems->ext_supp_rates_len = elen;
925 break;
926 case WLAN_EID_HT_CAPABILITY:
927 if (elen >= sizeof(struct ieee80211_ht_cap))
928 elems->ht_cap_elem = (void *)pos;
929 else
930 elem_parse_failed = true;
931 break;
932 case WLAN_EID_HT_OPERATION:
933 if (elen >= sizeof(struct ieee80211_ht_operation))
934 elems->ht_operation = (void *)pos;
935 else
936 elem_parse_failed = true;
937 break;
938 case WLAN_EID_VHT_CAPABILITY:
939 if (elen >= sizeof(struct ieee80211_vht_cap))
940 elems->vht_cap_elem = (void *)pos;
941 else
942 elem_parse_failed = true;
943 break;
944 case WLAN_EID_VHT_OPERATION:
945 if (elen >= sizeof(struct ieee80211_vht_operation))
946 elems->vht_operation = (void *)pos;
947 else
948 elem_parse_failed = true;
949 break;
950 case WLAN_EID_OPMODE_NOTIF:
951 if (elen > 0)
952 elems->opmode_notif = pos;
953 else
954 elem_parse_failed = true;
955 break;
956 case WLAN_EID_MESH_ID:
957 elems->mesh_id = pos;
958 elems->mesh_id_len = elen;
959 break;
960 case WLAN_EID_MESH_CONFIG:
961 if (elen >= sizeof(struct ieee80211_meshconf_ie))
962 elems->mesh_config = (void *)pos;
963 else
964 elem_parse_failed = true;
965 break;
966 case WLAN_EID_PEER_MGMT:
967 elems->peering = pos;
968 elems->peering_len = elen;
969 break;
970 case WLAN_EID_MESH_AWAKE_WINDOW:
971 if (elen >= 2)
972 elems->awake_window = (void *)pos;
973 break;
974 case WLAN_EID_PREQ:
975 elems->preq = pos;
976 elems->preq_len = elen;
977 break;
978 case WLAN_EID_PREP:
979 elems->prep = pos;
980 elems->prep_len = elen;
981 break;
982 case WLAN_EID_PERR:
983 elems->perr = pos;
984 elems->perr_len = elen;
985 break;
986 case WLAN_EID_RANN:
987 if (elen >= sizeof(struct ieee80211_rann_ie))
988 elems->rann = (void *)pos;
989 else
990 elem_parse_failed = true;
991 break;
992 case WLAN_EID_CHANNEL_SWITCH:
993 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
994 elem_parse_failed = true;
995 break;
996 }
997 elems->ch_switch_ie = (void *)pos;
998 break;
999 case WLAN_EID_EXT_CHANSWITCH_ANN:
1000 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1001 elem_parse_failed = true;
1002 break;
1003 }
1004 elems->ext_chansw_ie = (void *)pos;
1005 break;
1006 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1007 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1008 elem_parse_failed = true;
1009 break;
1010 }
1011 elems->sec_chan_offs = (void *)pos;
1012 break;
1013 case WLAN_EID_CHAN_SWITCH_PARAM:
1014 if (elen !=
1015 sizeof(*elems->mesh_chansw_params_ie)) {
1016 elem_parse_failed = true;
1017 break;
1018 }
1019 elems->mesh_chansw_params_ie = (void *)pos;
1020 break;
1021 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1022 if (!action ||
1023 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1024 elem_parse_failed = true;
1025 break;
1026 }
1027 elems->wide_bw_chansw_ie = (void *)pos;
1028 break;
1029 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1030 if (action) {
1031 elem_parse_failed = true;
1032 break;
1033 }
1034 /*
1035 * This is a bit tricky, but as we only care about
1036 * the wide bandwidth channel switch element, so
1037 * just parse it out manually.
1038 */
1039 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1040 pos, elen);
1041 if (ie) {
1042 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1043 elems->wide_bw_chansw_ie =
1044 (void *)(ie + 2);
1045 else
1046 elem_parse_failed = true;
1047 }
1048 break;
1049 case WLAN_EID_COUNTRY:
1050 elems->country_elem = pos;
1051 elems->country_elem_len = elen;
1052 break;
1053 case WLAN_EID_PWR_CONSTRAINT:
1054 if (elen != 1) {
1055 elem_parse_failed = true;
1056 break;
1057 }
1058 elems->pwr_constr_elem = pos;
1059 break;
1060 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1061 /* Lots of different options exist, but we only care
1062 * about the Dynamic Transmit Power Control element.
1063 * First check for the Cisco OUI, then for the DTPC
1064 * tag (0x00).
1065 */
1066 if (elen < 4) {
1067 elem_parse_failed = true;
1068 break;
1069 }
1070
1071 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1072 pos[2] != 0x96 || pos[3] != 0x00)
1073 break;
1074
1075 if (elen != 6) {
1076 elem_parse_failed = true;
1077 break;
1078 }
1079
1080 if (calc_crc)
1081 crc = crc32_be(crc, pos - 2, elen + 2);
1082
1083 elems->cisco_dtpc_elem = pos;
1084 break;
1085 case WLAN_EID_TIMEOUT_INTERVAL:
1086 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1087 elems->timeout_int = (void *)pos;
1088 else
1089 elem_parse_failed = true;
1090 break;
1091 default:
1092 break;
1093 }
1094
1095 if (elem_parse_failed)
1096 elems->parse_error = true;
1097 else
1098 __set_bit(id, seen_elems);
1099
1100 left -= elen;
1101 pos += elen;
1102 }
1103
1104 if (left != 0)
1105 elems->parse_error = true;
1106
1107 return crc;
1108 }
1109
1110 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1111 bool bss_notify, bool enable_qos)
1112 {
1113 struct ieee80211_local *local = sdata->local;
1114 struct ieee80211_tx_queue_params qparam;
1115 struct ieee80211_chanctx_conf *chanctx_conf;
1116 int ac;
1117 bool use_11b;
1118 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1119 int aCWmin, aCWmax;
1120
1121 if (!local->ops->conf_tx)
1122 return;
1123
1124 if (local->hw.queues < IEEE80211_NUM_ACS)
1125 return;
1126
1127 memset(&qparam, 0, sizeof(qparam));
1128
1129 rcu_read_lock();
1130 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1131 use_11b = (chanctx_conf &&
1132 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1133 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1134 rcu_read_unlock();
1135
1136 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1137
1138 /* Set defaults according to 802.11-2007 Table 7-37 */
1139 aCWmax = 1023;
1140 if (use_11b)
1141 aCWmin = 31;
1142 else
1143 aCWmin = 15;
1144
1145 /* Confiure old 802.11b/g medium access rules. */
1146 qparam.cw_max = aCWmax;
1147 qparam.cw_min = aCWmin;
1148 qparam.txop = 0;
1149 qparam.aifs = 2;
1150
1151 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1152 /* Update if QoS is enabled. */
1153 if (enable_qos) {
1154 switch (ac) {
1155 case IEEE80211_AC_BK:
1156 qparam.cw_max = aCWmax;
1157 qparam.cw_min = aCWmin;
1158 qparam.txop = 0;
1159 if (is_ocb)
1160 qparam.aifs = 9;
1161 else
1162 qparam.aifs = 7;
1163 break;
1164 /* never happens but let's not leave undefined */
1165 default:
1166 case IEEE80211_AC_BE:
1167 qparam.cw_max = aCWmax;
1168 qparam.cw_min = aCWmin;
1169 qparam.txop = 0;
1170 if (is_ocb)
1171 qparam.aifs = 6;
1172 else
1173 qparam.aifs = 3;
1174 break;
1175 case IEEE80211_AC_VI:
1176 qparam.cw_max = aCWmin;
1177 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1178 if (is_ocb)
1179 qparam.txop = 0;
1180 else if (use_11b)
1181 qparam.txop = 6016/32;
1182 else
1183 qparam.txop = 3008/32;
1184
1185 if (is_ocb)
1186 qparam.aifs = 3;
1187 else
1188 qparam.aifs = 2;
1189 break;
1190 case IEEE80211_AC_VO:
1191 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1192 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1193 if (is_ocb)
1194 qparam.txop = 0;
1195 else if (use_11b)
1196 qparam.txop = 3264/32;
1197 else
1198 qparam.txop = 1504/32;
1199 qparam.aifs = 2;
1200 break;
1201 }
1202 }
1203
1204 qparam.uapsd = false;
1205
1206 sdata->tx_conf[ac] = qparam;
1207 drv_conf_tx(local, sdata, ac, &qparam);
1208 }
1209
1210 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1211 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1212 sdata->vif.bss_conf.qos = enable_qos;
1213 if (bss_notify)
1214 ieee80211_bss_info_change_notify(sdata,
1215 BSS_CHANGED_QOS);
1216 }
1217 }
1218
1219 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1220 u16 transaction, u16 auth_alg, u16 status,
1221 const u8 *extra, size_t extra_len, const u8 *da,
1222 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1223 u32 tx_flags)
1224 {
1225 struct ieee80211_local *local = sdata->local;
1226 struct sk_buff *skb;
1227 struct ieee80211_mgmt *mgmt;
1228 int err;
1229
1230 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1231 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1232 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1233 if (!skb)
1234 return;
1235
1236 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1237
1238 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1239 memset(mgmt, 0, 24 + 6);
1240 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1241 IEEE80211_STYPE_AUTH);
1242 memcpy(mgmt->da, da, ETH_ALEN);
1243 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1244 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1245 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1246 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1247 mgmt->u.auth.status_code = cpu_to_le16(status);
1248 if (extra)
1249 memcpy(skb_put(skb, extra_len), extra, extra_len);
1250
1251 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1252 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1253 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1254 WARN_ON(err);
1255 }
1256
1257 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1258 tx_flags;
1259 ieee80211_tx_skb(sdata, skb);
1260 }
1261
1262 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1263 const u8 *bssid, u16 stype, u16 reason,
1264 bool send_frame, u8 *frame_buf)
1265 {
1266 struct ieee80211_local *local = sdata->local;
1267 struct sk_buff *skb;
1268 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1269
1270 /* build frame */
1271 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1272 mgmt->duration = 0; /* initialize only */
1273 mgmt->seq_ctrl = 0; /* initialize only */
1274 memcpy(mgmt->da, bssid, ETH_ALEN);
1275 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1276 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1277 /* u.deauth.reason_code == u.disassoc.reason_code */
1278 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1279
1280 if (send_frame) {
1281 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1282 IEEE80211_DEAUTH_FRAME_LEN);
1283 if (!skb)
1284 return;
1285
1286 skb_reserve(skb, local->hw.extra_tx_headroom);
1287
1288 /* copy in frame */
1289 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1290 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1291
1292 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1293 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1294 IEEE80211_SKB_CB(skb)->flags |=
1295 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1296
1297 ieee80211_tx_skb(sdata, skb);
1298 }
1299 }
1300
1301 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1302 u8 *buffer, size_t buffer_len,
1303 const u8 *ie, size_t ie_len,
1304 enum ieee80211_band band,
1305 u32 rate_mask,
1306 struct cfg80211_chan_def *chandef,
1307 size_t *offset)
1308 {
1309 struct ieee80211_supported_band *sband;
1310 u8 *pos = buffer, *end = buffer + buffer_len;
1311 size_t noffset;
1312 int supp_rates_len, i;
1313 u8 rates[32];
1314 int num_rates;
1315 int ext_rates_len;
1316 int shift;
1317 u32 rate_flags;
1318 bool have_80mhz = false;
1319
1320 *offset = 0;
1321
1322 sband = local->hw.wiphy->bands[band];
1323 if (WARN_ON_ONCE(!sband))
1324 return 0;
1325
1326 rate_flags = ieee80211_chandef_rate_flags(chandef);
1327 shift = ieee80211_chandef_get_shift(chandef);
1328
1329 num_rates = 0;
1330 for (i = 0; i < sband->n_bitrates; i++) {
1331 if ((BIT(i) & rate_mask) == 0)
1332 continue; /* skip rate */
1333 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1334 continue;
1335
1336 rates[num_rates++] =
1337 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1338 (1 << shift) * 5);
1339 }
1340
1341 supp_rates_len = min_t(int, num_rates, 8);
1342
1343 if (end - pos < 2 + supp_rates_len)
1344 goto out_err;
1345 *pos++ = WLAN_EID_SUPP_RATES;
1346 *pos++ = supp_rates_len;
1347 memcpy(pos, rates, supp_rates_len);
1348 pos += supp_rates_len;
1349
1350 /* insert "request information" if in custom IEs */
1351 if (ie && ie_len) {
1352 static const u8 before_extrates[] = {
1353 WLAN_EID_SSID,
1354 WLAN_EID_SUPP_RATES,
1355 WLAN_EID_REQUEST,
1356 };
1357 noffset = ieee80211_ie_split(ie, ie_len,
1358 before_extrates,
1359 ARRAY_SIZE(before_extrates),
1360 *offset);
1361 if (end - pos < noffset - *offset)
1362 goto out_err;
1363 memcpy(pos, ie + *offset, noffset - *offset);
1364 pos += noffset - *offset;
1365 *offset = noffset;
1366 }
1367
1368 ext_rates_len = num_rates - supp_rates_len;
1369 if (ext_rates_len > 0) {
1370 if (end - pos < 2 + ext_rates_len)
1371 goto out_err;
1372 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1373 *pos++ = ext_rates_len;
1374 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1375 pos += ext_rates_len;
1376 }
1377
1378 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1379 if (end - pos < 3)
1380 goto out_err;
1381 *pos++ = WLAN_EID_DS_PARAMS;
1382 *pos++ = 1;
1383 *pos++ = ieee80211_frequency_to_channel(
1384 chandef->chan->center_freq);
1385 }
1386
1387 /* insert custom IEs that go before HT */
1388 if (ie && ie_len) {
1389 static const u8 before_ht[] = {
1390 WLAN_EID_SSID,
1391 WLAN_EID_SUPP_RATES,
1392 WLAN_EID_REQUEST,
1393 WLAN_EID_EXT_SUPP_RATES,
1394 WLAN_EID_DS_PARAMS,
1395 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1396 };
1397 noffset = ieee80211_ie_split(ie, ie_len,
1398 before_ht, ARRAY_SIZE(before_ht),
1399 *offset);
1400 if (end - pos < noffset - *offset)
1401 goto out_err;
1402 memcpy(pos, ie + *offset, noffset - *offset);
1403 pos += noffset - *offset;
1404 *offset = noffset;
1405 }
1406
1407 if (sband->ht_cap.ht_supported) {
1408 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1409 goto out_err;
1410 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1411 sband->ht_cap.cap);
1412 }
1413
1414 /*
1415 * If adding more here, adjust code in main.c
1416 * that calculates local->scan_ies_len.
1417 */
1418
1419 /* insert custom IEs that go before VHT */
1420 if (ie && ie_len) {
1421 static const u8 before_vht[] = {
1422 WLAN_EID_SSID,
1423 WLAN_EID_SUPP_RATES,
1424 WLAN_EID_REQUEST,
1425 WLAN_EID_EXT_SUPP_RATES,
1426 WLAN_EID_DS_PARAMS,
1427 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1428 WLAN_EID_HT_CAPABILITY,
1429 WLAN_EID_BSS_COEX_2040,
1430 WLAN_EID_EXT_CAPABILITY,
1431 WLAN_EID_SSID_LIST,
1432 WLAN_EID_CHANNEL_USAGE,
1433 WLAN_EID_INTERWORKING,
1434 /* mesh ID can't happen here */
1435 /* 60 GHz can't happen here right now */
1436 };
1437 noffset = ieee80211_ie_split(ie, ie_len,
1438 before_vht, ARRAY_SIZE(before_vht),
1439 *offset);
1440 if (end - pos < noffset - *offset)
1441 goto out_err;
1442 memcpy(pos, ie + *offset, noffset - *offset);
1443 pos += noffset - *offset;
1444 *offset = noffset;
1445 }
1446
1447 /* Check if any channel in this sband supports at least 80 MHz */
1448 for (i = 0; i < sband->n_channels; i++) {
1449 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1450 IEEE80211_CHAN_NO_80MHZ))
1451 continue;
1452
1453 have_80mhz = true;
1454 break;
1455 }
1456
1457 if (sband->vht_cap.vht_supported && have_80mhz) {
1458 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1459 goto out_err;
1460 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1461 sband->vht_cap.cap);
1462 }
1463
1464 return pos - buffer;
1465 out_err:
1466 WARN_ONCE(1, "not enough space for preq IEs\n");
1467 return pos - buffer;
1468 }
1469
1470 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1471 size_t buffer_len,
1472 struct ieee80211_scan_ies *ie_desc,
1473 const u8 *ie, size_t ie_len,
1474 u8 bands_used, u32 *rate_masks,
1475 struct cfg80211_chan_def *chandef)
1476 {
1477 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1478 int i;
1479
1480 memset(ie_desc, 0, sizeof(*ie_desc));
1481
1482 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1483 if (bands_used & BIT(i)) {
1484 pos += ieee80211_build_preq_ies_band(local,
1485 buffer + pos,
1486 buffer_len - pos,
1487 ie, ie_len, i,
1488 rate_masks[i],
1489 chandef,
1490 &custom_ie_offset);
1491 ie_desc->ies[i] = buffer + old_pos;
1492 ie_desc->len[i] = pos - old_pos;
1493 old_pos = pos;
1494 }
1495 }
1496
1497 /* add any remaining custom IEs */
1498 if (ie && ie_len) {
1499 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1500 "not enough space for preq custom IEs\n"))
1501 return pos;
1502 memcpy(buffer + pos, ie + custom_ie_offset,
1503 ie_len - custom_ie_offset);
1504 ie_desc->common_ies = buffer + pos;
1505 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1506 pos += ie_len - custom_ie_offset;
1507 }
1508
1509 return pos;
1510 };
1511
1512 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1513 const u8 *src, const u8 *dst,
1514 u32 ratemask,
1515 struct ieee80211_channel *chan,
1516 const u8 *ssid, size_t ssid_len,
1517 const u8 *ie, size_t ie_len,
1518 bool directed)
1519 {
1520 struct ieee80211_local *local = sdata->local;
1521 struct cfg80211_chan_def chandef;
1522 struct sk_buff *skb;
1523 struct ieee80211_mgmt *mgmt;
1524 int ies_len;
1525 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1526 struct ieee80211_scan_ies dummy_ie_desc;
1527
1528 /*
1529 * Do not send DS Channel parameter for directed probe requests
1530 * in order to maximize the chance that we get a response. Some
1531 * badly-behaved APs don't respond when this parameter is included.
1532 */
1533 chandef.width = sdata->vif.bss_conf.chandef.width;
1534 if (directed)
1535 chandef.chan = NULL;
1536 else
1537 chandef.chan = chan;
1538
1539 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1540 100 + ie_len);
1541 if (!skb)
1542 return NULL;
1543
1544 rate_masks[chan->band] = ratemask;
1545 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1546 skb_tailroom(skb), &dummy_ie_desc,
1547 ie, ie_len, BIT(chan->band),
1548 rate_masks, &chandef);
1549 skb_put(skb, ies_len);
1550
1551 if (dst) {
1552 mgmt = (struct ieee80211_mgmt *) skb->data;
1553 memcpy(mgmt->da, dst, ETH_ALEN);
1554 memcpy(mgmt->bssid, dst, ETH_ALEN);
1555 }
1556
1557 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1558
1559 return skb;
1560 }
1561
1562 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1563 const u8 *src, const u8 *dst,
1564 const u8 *ssid, size_t ssid_len,
1565 const u8 *ie, size_t ie_len,
1566 u32 ratemask, bool directed, u32 tx_flags,
1567 struct ieee80211_channel *channel, bool scan)
1568 {
1569 struct sk_buff *skb;
1570
1571 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1572 ssid, ssid_len,
1573 ie, ie_len, directed);
1574 if (skb) {
1575 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1576 if (scan)
1577 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1578 else
1579 ieee80211_tx_skb(sdata, skb);
1580 }
1581 }
1582
1583 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1584 struct ieee802_11_elems *elems,
1585 enum ieee80211_band band, u32 *basic_rates)
1586 {
1587 struct ieee80211_supported_band *sband;
1588 size_t num_rates;
1589 u32 supp_rates, rate_flags;
1590 int i, j, shift;
1591 sband = sdata->local->hw.wiphy->bands[band];
1592
1593 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1594 shift = ieee80211_vif_get_shift(&sdata->vif);
1595
1596 if (WARN_ON(!sband))
1597 return 1;
1598
1599 num_rates = sband->n_bitrates;
1600 supp_rates = 0;
1601 for (i = 0; i < elems->supp_rates_len +
1602 elems->ext_supp_rates_len; i++) {
1603 u8 rate = 0;
1604 int own_rate;
1605 bool is_basic;
1606 if (i < elems->supp_rates_len)
1607 rate = elems->supp_rates[i];
1608 else if (elems->ext_supp_rates)
1609 rate = elems->ext_supp_rates
1610 [i - elems->supp_rates_len];
1611 own_rate = 5 * (rate & 0x7f);
1612 is_basic = !!(rate & 0x80);
1613
1614 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1615 continue;
1616
1617 for (j = 0; j < num_rates; j++) {
1618 int brate;
1619 if ((rate_flags & sband->bitrates[j].flags)
1620 != rate_flags)
1621 continue;
1622
1623 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1624 1 << shift);
1625
1626 if (brate == own_rate) {
1627 supp_rates |= BIT(j);
1628 if (basic_rates && is_basic)
1629 *basic_rates |= BIT(j);
1630 }
1631 }
1632 }
1633 return supp_rates;
1634 }
1635
1636 void ieee80211_stop_device(struct ieee80211_local *local)
1637 {
1638 ieee80211_led_radio(local, false);
1639 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1640
1641 cancel_work_sync(&local->reconfig_filter);
1642
1643 flush_workqueue(local->workqueue);
1644 drv_stop(local);
1645 }
1646
1647 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1648 bool aborted)
1649 {
1650 /* It's possible that we don't handle the scan completion in
1651 * time during suspend, so if it's still marked as completed
1652 * here, queue the work and flush it to clean things up.
1653 * Instead of calling the worker function directly here, we
1654 * really queue it to avoid potential races with other flows
1655 * scheduling the same work.
1656 */
1657 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1658 /* If coming from reconfiguration failure, abort the scan so
1659 * we don't attempt to continue a partial HW scan - which is
1660 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1661 * completed scan, and a 5 GHz portion is still pending.
1662 */
1663 if (aborted)
1664 set_bit(SCAN_ABORTED, &local->scanning);
1665 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1666 flush_delayed_work(&local->scan_work);
1667 }
1668 }
1669
1670 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1671 {
1672 struct ieee80211_sub_if_data *sdata;
1673 struct ieee80211_chanctx *ctx;
1674
1675 /*
1676 * We get here if during resume the device can't be restarted properly.
1677 * We might also get here if this happens during HW reset, which is a
1678 * slightly different situation and we need to drop all connections in
1679 * the latter case.
1680 *
1681 * Ask cfg80211 to turn off all interfaces, this will result in more
1682 * warnings but at least we'll then get into a clean stopped state.
1683 */
1684
1685 local->resuming = false;
1686 local->suspended = false;
1687 local->in_reconfig = false;
1688
1689 ieee80211_flush_completed_scan(local, true);
1690
1691 /* scheduled scan clearly can't be running any more, but tell
1692 * cfg80211 and clear local state
1693 */
1694 ieee80211_sched_scan_end(local);
1695
1696 list_for_each_entry(sdata, &local->interfaces, list)
1697 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1698
1699 /* Mark channel contexts as not being in the driver any more to avoid
1700 * removing them from the driver during the shutdown process...
1701 */
1702 mutex_lock(&local->chanctx_mtx);
1703 list_for_each_entry(ctx, &local->chanctx_list, list)
1704 ctx->driver_present = false;
1705 mutex_unlock(&local->chanctx_mtx);
1706
1707 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1708 }
1709
1710 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1711 struct ieee80211_sub_if_data *sdata)
1712 {
1713 struct ieee80211_chanctx_conf *conf;
1714 struct ieee80211_chanctx *ctx;
1715
1716 if (!local->use_chanctx)
1717 return;
1718
1719 mutex_lock(&local->chanctx_mtx);
1720 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1721 lockdep_is_held(&local->chanctx_mtx));
1722 if (conf) {
1723 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1724 drv_assign_vif_chanctx(local, sdata, ctx);
1725 }
1726 mutex_unlock(&local->chanctx_mtx);
1727 }
1728
1729 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1730 {
1731 struct ieee80211_local *local = sdata->local;
1732 struct sta_info *sta;
1733
1734 /* add STAs back */
1735 mutex_lock(&local->sta_mtx);
1736 list_for_each_entry(sta, &local->sta_list, list) {
1737 enum ieee80211_sta_state state;
1738
1739 if (!sta->uploaded || sta->sdata != sdata)
1740 continue;
1741
1742 for (state = IEEE80211_STA_NOTEXIST;
1743 state < sta->sta_state; state++)
1744 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1745 state + 1));
1746 }
1747 mutex_unlock(&local->sta_mtx);
1748 }
1749
1750 int ieee80211_reconfig(struct ieee80211_local *local)
1751 {
1752 struct ieee80211_hw *hw = &local->hw;
1753 struct ieee80211_sub_if_data *sdata;
1754 struct ieee80211_chanctx *ctx;
1755 struct sta_info *sta;
1756 int res, i;
1757 bool reconfig_due_to_wowlan = false;
1758 struct ieee80211_sub_if_data *sched_scan_sdata;
1759 struct cfg80211_sched_scan_request *sched_scan_req;
1760 bool sched_scan_stopped = false;
1761 bool suspended = local->suspended;
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 (suspended)
1769 local->resuming = true;
1770
1771 if (local->wowlan) {
1772 /*
1773 * In the wowlan case, both mac80211 and the device
1774 * are functional when the resume op is called, so
1775 * clear local->suspended so the device could operate
1776 * normally (e.g. pass rx frames).
1777 */
1778 local->suspended = false;
1779 res = drv_resume(local);
1780 local->wowlan = false;
1781 if (res < 0) {
1782 local->resuming = false;
1783 return res;
1784 }
1785 if (res == 0)
1786 goto wake_up;
1787 WARN_ON(res > 1);
1788 /*
1789 * res is 1, which means the driver requested
1790 * to go through a regular reset on wakeup.
1791 * restore local->suspended in this case.
1792 */
1793 reconfig_due_to_wowlan = true;
1794 local->suspended = true;
1795 }
1796 #endif
1797
1798 /*
1799 * In case of hw_restart during suspend (without wowlan),
1800 * cancel restart work, as we are reconfiguring the device
1801 * anyway.
1802 * Note that restart_work is scheduled on a frozen workqueue,
1803 * so we can't deadlock in this case.
1804 */
1805 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1806 cancel_work_sync(&local->restart_work);
1807
1808 local->started = false;
1809
1810 /*
1811 * Upon resume hardware can sometimes be goofy due to
1812 * various platform / driver / bus issues, so restarting
1813 * the device may at times not work immediately. Propagate
1814 * the error.
1815 */
1816 res = drv_start(local);
1817 if (res) {
1818 if (suspended)
1819 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1820 else
1821 WARN(1, "Hardware became unavailable during restart.\n");
1822 ieee80211_handle_reconfig_failure(local);
1823 return res;
1824 }
1825
1826 /* setup fragmentation threshold */
1827 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1828
1829 /* setup RTS threshold */
1830 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1831
1832 /* reset coverage class */
1833 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1834
1835 ieee80211_led_radio(local, true);
1836 ieee80211_mod_tpt_led_trig(local,
1837 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1838
1839 /* add interfaces */
1840 sdata = rtnl_dereference(local->monitor_sdata);
1841 if (sdata) {
1842 /* in HW restart it exists already */
1843 WARN_ON(local->resuming);
1844 res = drv_add_interface(local, sdata);
1845 if (WARN_ON(res)) {
1846 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1847 synchronize_net();
1848 kfree(sdata);
1849 }
1850 }
1851
1852 list_for_each_entry(sdata, &local->interfaces, list) {
1853 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1854 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1855 ieee80211_sdata_running(sdata)) {
1856 res = drv_add_interface(local, sdata);
1857 if (WARN_ON(res))
1858 break;
1859 }
1860 }
1861
1862 /* If adding any of the interfaces failed above, roll back and
1863 * report failure.
1864 */
1865 if (res) {
1866 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1867 list)
1868 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1869 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1870 ieee80211_sdata_running(sdata))
1871 drv_remove_interface(local, sdata);
1872 ieee80211_handle_reconfig_failure(local);
1873 return res;
1874 }
1875
1876 /* add channel contexts */
1877 if (local->use_chanctx) {
1878 mutex_lock(&local->chanctx_mtx);
1879 list_for_each_entry(ctx, &local->chanctx_list, list)
1880 if (ctx->replace_state !=
1881 IEEE80211_CHANCTX_REPLACES_OTHER)
1882 WARN_ON(drv_add_chanctx(local, ctx));
1883 mutex_unlock(&local->chanctx_mtx);
1884
1885 sdata = rtnl_dereference(local->monitor_sdata);
1886 if (sdata && ieee80211_sdata_running(sdata))
1887 ieee80211_assign_chanctx(local, sdata);
1888 }
1889
1890 /* reconfigure hardware */
1891 ieee80211_hw_config(local, ~0);
1892
1893 ieee80211_configure_filter(local);
1894
1895 /* Finally also reconfigure all the BSS information */
1896 list_for_each_entry(sdata, &local->interfaces, list) {
1897 u32 changed;
1898
1899 if (!ieee80211_sdata_running(sdata))
1900 continue;
1901
1902 ieee80211_assign_chanctx(local, sdata);
1903
1904 switch (sdata->vif.type) {
1905 case NL80211_IFTYPE_AP_VLAN:
1906 case NL80211_IFTYPE_MONITOR:
1907 break;
1908 default:
1909 ieee80211_reconfig_stations(sdata);
1910 /* fall through */
1911 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1912 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1913 drv_conf_tx(local, sdata, i,
1914 &sdata->tx_conf[i]);
1915 break;
1916 }
1917
1918 /* common change flags for all interface types */
1919 changed = BSS_CHANGED_ERP_CTS_PROT |
1920 BSS_CHANGED_ERP_PREAMBLE |
1921 BSS_CHANGED_ERP_SLOT |
1922 BSS_CHANGED_HT |
1923 BSS_CHANGED_BASIC_RATES |
1924 BSS_CHANGED_BEACON_INT |
1925 BSS_CHANGED_BSSID |
1926 BSS_CHANGED_CQM |
1927 BSS_CHANGED_QOS |
1928 BSS_CHANGED_IDLE |
1929 BSS_CHANGED_TXPOWER;
1930
1931 if (sdata->flags & IEEE80211_SDATA_MU_MIMO_OWNER)
1932 changed |= BSS_CHANGED_MU_GROUPS;
1933
1934 switch (sdata->vif.type) {
1935 case NL80211_IFTYPE_STATION:
1936 changed |= BSS_CHANGED_ASSOC |
1937 BSS_CHANGED_ARP_FILTER |
1938 BSS_CHANGED_PS;
1939
1940 /* Re-send beacon info report to the driver */
1941 if (sdata->u.mgd.have_beacon)
1942 changed |= BSS_CHANGED_BEACON_INFO;
1943
1944 sdata_lock(sdata);
1945 ieee80211_bss_info_change_notify(sdata, changed);
1946 sdata_unlock(sdata);
1947 break;
1948 case NL80211_IFTYPE_OCB:
1949 changed |= BSS_CHANGED_OCB;
1950 ieee80211_bss_info_change_notify(sdata, changed);
1951 break;
1952 case NL80211_IFTYPE_ADHOC:
1953 changed |= BSS_CHANGED_IBSS;
1954 /* fall through */
1955 case NL80211_IFTYPE_AP:
1956 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1957
1958 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1959 changed |= BSS_CHANGED_AP_PROBE_RESP;
1960
1961 if (rcu_access_pointer(sdata->u.ap.beacon))
1962 drv_start_ap(local, sdata);
1963 }
1964
1965 /* fall through */
1966 case NL80211_IFTYPE_MESH_POINT:
1967 if (sdata->vif.bss_conf.enable_beacon) {
1968 changed |= BSS_CHANGED_BEACON |
1969 BSS_CHANGED_BEACON_ENABLED;
1970 ieee80211_bss_info_change_notify(sdata, changed);
1971 }
1972 break;
1973 case NL80211_IFTYPE_WDS:
1974 case NL80211_IFTYPE_AP_VLAN:
1975 case NL80211_IFTYPE_MONITOR:
1976 case NL80211_IFTYPE_P2P_DEVICE:
1977 /* nothing to do */
1978 break;
1979 case NL80211_IFTYPE_UNSPECIFIED:
1980 case NUM_NL80211_IFTYPES:
1981 case NL80211_IFTYPE_P2P_CLIENT:
1982 case NL80211_IFTYPE_P2P_GO:
1983 WARN_ON(1);
1984 break;
1985 }
1986 }
1987
1988 ieee80211_recalc_ps(local);
1989
1990 /*
1991 * The sta might be in psm against the ap (e.g. because
1992 * this was the state before a hw restart), so we
1993 * explicitly send a null packet in order to make sure
1994 * it'll sync against the ap (and get out of psm).
1995 */
1996 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1997 list_for_each_entry(sdata, &local->interfaces, list) {
1998 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1999 continue;
2000 if (!sdata->u.mgd.associated)
2001 continue;
2002
2003 ieee80211_send_nullfunc(local, sdata, false);
2004 }
2005 }
2006
2007 /* APs are now beaconing, add back stations */
2008 mutex_lock(&local->sta_mtx);
2009 list_for_each_entry(sta, &local->sta_list, list) {
2010 enum ieee80211_sta_state state;
2011
2012 if (!sta->uploaded)
2013 continue;
2014
2015 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2016 continue;
2017
2018 for (state = IEEE80211_STA_NOTEXIST;
2019 state < sta->sta_state; state++)
2020 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2021 state + 1));
2022 }
2023 mutex_unlock(&local->sta_mtx);
2024
2025 /* add back keys */
2026 list_for_each_entry(sdata, &local->interfaces, list)
2027 ieee80211_reset_crypto_tx_tailroom(sdata);
2028
2029 list_for_each_entry(sdata, &local->interfaces, list)
2030 if (ieee80211_sdata_running(sdata))
2031 ieee80211_enable_keys(sdata);
2032
2033 /* Reconfigure sched scan if it was interrupted by FW restart */
2034 mutex_lock(&local->mtx);
2035 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2036 lockdep_is_held(&local->mtx));
2037 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2038 lockdep_is_held(&local->mtx));
2039 if (sched_scan_sdata && sched_scan_req)
2040 /*
2041 * Sched scan stopped, but we don't want to report it. Instead,
2042 * we're trying to reschedule. However, if more than one scan
2043 * plan was set, we cannot reschedule since we don't know which
2044 * scan plan was currently running (and some scan plans may have
2045 * already finished).
2046 */
2047 if (sched_scan_req->n_scan_plans > 1 ||
2048 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2049 sched_scan_req))
2050 sched_scan_stopped = true;
2051 mutex_unlock(&local->mtx);
2052
2053 if (sched_scan_stopped)
2054 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2055
2056 wake_up:
2057 local->in_reconfig = false;
2058 barrier();
2059
2060 if (local->monitors == local->open_count && local->monitors > 0)
2061 ieee80211_add_virtual_monitor(local);
2062
2063 /*
2064 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2065 * sessions can be established after a resume.
2066 *
2067 * Also tear down aggregation sessions since reconfiguring
2068 * them in a hardware restart scenario is not easily done
2069 * right now, and the hardware will have lost information
2070 * about the sessions, but we and the AP still think they
2071 * are active. This is really a workaround though.
2072 */
2073 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2074 mutex_lock(&local->sta_mtx);
2075
2076 list_for_each_entry(sta, &local->sta_list, list) {
2077 if (!local->resuming)
2078 ieee80211_sta_tear_down_BA_sessions(
2079 sta, AGG_STOP_LOCAL_REQUEST);
2080 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2081 }
2082
2083 mutex_unlock(&local->sta_mtx);
2084 }
2085
2086 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2087 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2088 false);
2089
2090 /*
2091 * If this is for hw restart things are still running.
2092 * We may want to change that later, however.
2093 */
2094 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2095 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2096
2097 if (!suspended)
2098 return 0;
2099
2100 #ifdef CONFIG_PM
2101 /* first set suspended false, then resuming */
2102 local->suspended = false;
2103 mb();
2104 local->resuming = false;
2105
2106 ieee80211_flush_completed_scan(local, false);
2107
2108 if (local->open_count && !reconfig_due_to_wowlan)
2109 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2110
2111 list_for_each_entry(sdata, &local->interfaces, list) {
2112 if (!ieee80211_sdata_running(sdata))
2113 continue;
2114 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2115 ieee80211_sta_restart(sdata);
2116 }
2117
2118 mod_timer(&local->sta_cleanup, jiffies + 1);
2119 #else
2120 WARN_ON(1);
2121 #endif
2122
2123 return 0;
2124 }
2125
2126 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2127 {
2128 struct ieee80211_sub_if_data *sdata;
2129 struct ieee80211_local *local;
2130 struct ieee80211_key *key;
2131
2132 if (WARN_ON(!vif))
2133 return;
2134
2135 sdata = vif_to_sdata(vif);
2136 local = sdata->local;
2137
2138 if (WARN_ON(!local->resuming))
2139 return;
2140
2141 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2142 return;
2143
2144 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2145
2146 mutex_lock(&local->key_mtx);
2147 list_for_each_entry(key, &sdata->key_list, list)
2148 key->flags |= KEY_FLAG_TAINTED;
2149 mutex_unlock(&local->key_mtx);
2150 }
2151 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2152
2153 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2154 {
2155 struct ieee80211_local *local = sdata->local;
2156 struct ieee80211_chanctx_conf *chanctx_conf;
2157 struct ieee80211_chanctx *chanctx;
2158
2159 mutex_lock(&local->chanctx_mtx);
2160
2161 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2162 lockdep_is_held(&local->chanctx_mtx));
2163
2164 /*
2165 * This function can be called from a work, thus it may be possible
2166 * that the chanctx_conf is removed (due to a disconnection, for
2167 * example).
2168 * So nothing should be done in such case.
2169 */
2170 if (!chanctx_conf)
2171 goto unlock;
2172
2173 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2174 ieee80211_recalc_smps_chanctx(local, chanctx);
2175 unlock:
2176 mutex_unlock(&local->chanctx_mtx);
2177 }
2178
2179 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2180 {
2181 struct ieee80211_local *local = sdata->local;
2182 struct ieee80211_chanctx_conf *chanctx_conf;
2183 struct ieee80211_chanctx *chanctx;
2184
2185 mutex_lock(&local->chanctx_mtx);
2186
2187 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2188 lockdep_is_held(&local->chanctx_mtx));
2189
2190 if (WARN_ON_ONCE(!chanctx_conf))
2191 goto unlock;
2192
2193 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2194 ieee80211_recalc_chanctx_min_def(local, chanctx);
2195 unlock:
2196 mutex_unlock(&local->chanctx_mtx);
2197 }
2198
2199 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2200 {
2201 size_t pos = offset;
2202
2203 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2204 pos += 2 + ies[pos + 1];
2205
2206 return pos;
2207 }
2208
2209 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2210 int rssi_min_thold,
2211 int rssi_max_thold)
2212 {
2213 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2214
2215 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2216 return;
2217
2218 /*
2219 * Scale up threshold values before storing it, as the RSSI averaging
2220 * algorithm uses a scaled up value as well. Change this scaling
2221 * factor if the RSSI averaging algorithm changes.
2222 */
2223 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2224 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2225 }
2226
2227 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2228 int rssi_min_thold,
2229 int rssi_max_thold)
2230 {
2231 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2232
2233 WARN_ON(rssi_min_thold == rssi_max_thold ||
2234 rssi_min_thold > rssi_max_thold);
2235
2236 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2237 rssi_max_thold);
2238 }
2239 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2240
2241 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2242 {
2243 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2244
2245 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2246 }
2247 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2248
2249 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2250 u16 cap)
2251 {
2252 __le16 tmp;
2253
2254 *pos++ = WLAN_EID_HT_CAPABILITY;
2255 *pos++ = sizeof(struct ieee80211_ht_cap);
2256 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2257
2258 /* capability flags */
2259 tmp = cpu_to_le16(cap);
2260 memcpy(pos, &tmp, sizeof(u16));
2261 pos += sizeof(u16);
2262
2263 /* AMPDU parameters */
2264 *pos++ = ht_cap->ampdu_factor |
2265 (ht_cap->ampdu_density <<
2266 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2267
2268 /* MCS set */
2269 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2270 pos += sizeof(ht_cap->mcs);
2271
2272 /* extended capabilities */
2273 pos += sizeof(__le16);
2274
2275 /* BF capabilities */
2276 pos += sizeof(__le32);
2277
2278 /* antenna selection */
2279 pos += sizeof(u8);
2280
2281 return pos;
2282 }
2283
2284 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2285 u32 cap)
2286 {
2287 __le32 tmp;
2288
2289 *pos++ = WLAN_EID_VHT_CAPABILITY;
2290 *pos++ = sizeof(struct ieee80211_vht_cap);
2291 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2292
2293 /* capability flags */
2294 tmp = cpu_to_le32(cap);
2295 memcpy(pos, &tmp, sizeof(u32));
2296 pos += sizeof(u32);
2297
2298 /* VHT MCS set */
2299 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2300 pos += sizeof(vht_cap->vht_mcs);
2301
2302 return pos;
2303 }
2304
2305 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2306 const struct cfg80211_chan_def *chandef,
2307 u16 prot_mode, bool rifs_mode)
2308 {
2309 struct ieee80211_ht_operation *ht_oper;
2310 /* Build HT Information */
2311 *pos++ = WLAN_EID_HT_OPERATION;
2312 *pos++ = sizeof(struct ieee80211_ht_operation);
2313 ht_oper = (struct ieee80211_ht_operation *)pos;
2314 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2315 chandef->chan->center_freq);
2316 switch (chandef->width) {
2317 case NL80211_CHAN_WIDTH_160:
2318 case NL80211_CHAN_WIDTH_80P80:
2319 case NL80211_CHAN_WIDTH_80:
2320 case NL80211_CHAN_WIDTH_40:
2321 if (chandef->center_freq1 > chandef->chan->center_freq)
2322 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2323 else
2324 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2325 break;
2326 default:
2327 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2328 break;
2329 }
2330 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2331 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2332 chandef->width != NL80211_CHAN_WIDTH_20)
2333 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2334
2335 if (rifs_mode)
2336 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2337
2338 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2339 ht_oper->stbc_param = 0x0000;
2340
2341 /* It seems that Basic MCS set and Supported MCS set
2342 are identical for the first 10 bytes */
2343 memset(&ht_oper->basic_set, 0, 16);
2344 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2345
2346 return pos + sizeof(struct ieee80211_ht_operation);
2347 }
2348
2349 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2350 const struct cfg80211_chan_def *chandef)
2351 {
2352 struct ieee80211_vht_operation *vht_oper;
2353
2354 *pos++ = WLAN_EID_VHT_OPERATION;
2355 *pos++ = sizeof(struct ieee80211_vht_operation);
2356 vht_oper = (struct ieee80211_vht_operation *)pos;
2357 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2358 chandef->center_freq1);
2359 if (chandef->center_freq2)
2360 vht_oper->center_freq_seg2_idx =
2361 ieee80211_frequency_to_channel(chandef->center_freq2);
2362 else
2363 vht_oper->center_freq_seg2_idx = 0x00;
2364
2365 switch (chandef->width) {
2366 case NL80211_CHAN_WIDTH_160:
2367 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2368 break;
2369 case NL80211_CHAN_WIDTH_80P80:
2370 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2371 break;
2372 case NL80211_CHAN_WIDTH_80:
2373 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2374 break;
2375 default:
2376 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2377 break;
2378 }
2379
2380 /* don't require special VHT peer rates */
2381 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2382
2383 return pos + sizeof(struct ieee80211_vht_operation);
2384 }
2385
2386 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2387 struct cfg80211_chan_def *chandef)
2388 {
2389 enum nl80211_channel_type channel_type;
2390
2391 if (!ht_oper)
2392 return false;
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 return false;
2407 }
2408
2409 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2410 return true;
2411 }
2412
2413 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2414 struct cfg80211_chan_def *chandef)
2415 {
2416 struct cfg80211_chan_def new = *chandef;
2417 int cf1, cf2;
2418
2419 if (!oper)
2420 return false;
2421
2422 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2423 chandef->chan->band);
2424 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2425 chandef->chan->band);
2426
2427 switch (oper->chan_width) {
2428 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2429 break;
2430 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2431 new.width = NL80211_CHAN_WIDTH_80;
2432 new.center_freq1 = cf1;
2433 break;
2434 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2435 new.width = NL80211_CHAN_WIDTH_160;
2436 new.center_freq1 = cf1;
2437 break;
2438 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2439 new.width = NL80211_CHAN_WIDTH_80P80;
2440 new.center_freq1 = cf1;
2441 new.center_freq2 = cf2;
2442 break;
2443 default:
2444 return false;
2445 }
2446
2447 if (!cfg80211_chandef_valid(&new))
2448 return false;
2449
2450 *chandef = new;
2451 return true;
2452 }
2453
2454 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2455 const struct ieee80211_supported_band *sband,
2456 const u8 *srates, int srates_len, u32 *rates)
2457 {
2458 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2459 int shift = ieee80211_chandef_get_shift(chandef);
2460 struct ieee80211_rate *br;
2461 int brate, rate, i, j, count = 0;
2462
2463 *rates = 0;
2464
2465 for (i = 0; i < srates_len; i++) {
2466 rate = srates[i] & 0x7f;
2467
2468 for (j = 0; j < sband->n_bitrates; j++) {
2469 br = &sband->bitrates[j];
2470 if ((rate_flags & br->flags) != rate_flags)
2471 continue;
2472
2473 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2474 if (brate == rate) {
2475 *rates |= BIT(j);
2476 count++;
2477 break;
2478 }
2479 }
2480 }
2481 return count;
2482 }
2483
2484 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2485 struct sk_buff *skb, bool need_basic,
2486 enum ieee80211_band band)
2487 {
2488 struct ieee80211_local *local = sdata->local;
2489 struct ieee80211_supported_band *sband;
2490 int rate, shift;
2491 u8 i, rates, *pos;
2492 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2493 u32 rate_flags;
2494
2495 shift = ieee80211_vif_get_shift(&sdata->vif);
2496 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2497 sband = local->hw.wiphy->bands[band];
2498 rates = 0;
2499 for (i = 0; i < sband->n_bitrates; i++) {
2500 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2501 continue;
2502 rates++;
2503 }
2504 if (rates > 8)
2505 rates = 8;
2506
2507 if (skb_tailroom(skb) < rates + 2)
2508 return -ENOMEM;
2509
2510 pos = skb_put(skb, rates + 2);
2511 *pos++ = WLAN_EID_SUPP_RATES;
2512 *pos++ = rates;
2513 for (i = 0; i < rates; i++) {
2514 u8 basic = 0;
2515 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2516 continue;
2517
2518 if (need_basic && basic_rates & BIT(i))
2519 basic = 0x80;
2520 rate = sband->bitrates[i].bitrate;
2521 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2522 5 * (1 << shift));
2523 *pos++ = basic | (u8) rate;
2524 }
2525
2526 return 0;
2527 }
2528
2529 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2530 struct sk_buff *skb, bool need_basic,
2531 enum ieee80211_band band)
2532 {
2533 struct ieee80211_local *local = sdata->local;
2534 struct ieee80211_supported_band *sband;
2535 int rate, shift;
2536 u8 i, exrates, *pos;
2537 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2538 u32 rate_flags;
2539
2540 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2541 shift = ieee80211_vif_get_shift(&sdata->vif);
2542
2543 sband = local->hw.wiphy->bands[band];
2544 exrates = 0;
2545 for (i = 0; i < sband->n_bitrates; i++) {
2546 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2547 continue;
2548 exrates++;
2549 }
2550
2551 if (exrates > 8)
2552 exrates -= 8;
2553 else
2554 exrates = 0;
2555
2556 if (skb_tailroom(skb) < exrates + 2)
2557 return -ENOMEM;
2558
2559 if (exrates) {
2560 pos = skb_put(skb, exrates + 2);
2561 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2562 *pos++ = exrates;
2563 for (i = 8; i < sband->n_bitrates; i++) {
2564 u8 basic = 0;
2565 if ((rate_flags & sband->bitrates[i].flags)
2566 != rate_flags)
2567 continue;
2568 if (need_basic && basic_rates & BIT(i))
2569 basic = 0x80;
2570 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2571 5 * (1 << shift));
2572 *pos++ = basic | (u8) rate;
2573 }
2574 }
2575 return 0;
2576 }
2577
2578 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2579 {
2580 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2581 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2582
2583 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2584 /* non-managed type inferfaces */
2585 return 0;
2586 }
2587 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2588 }
2589 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2590
2591 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2592 {
2593 if (!mcs)
2594 return 1;
2595
2596 /* TODO: consider rx_highest */
2597
2598 if (mcs->rx_mask[3])
2599 return 4;
2600 if (mcs->rx_mask[2])
2601 return 3;
2602 if (mcs->rx_mask[1])
2603 return 2;
2604 return 1;
2605 }
2606
2607 /**
2608 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2609 * @local: mac80211 hw info struct
2610 * @status: RX status
2611 * @mpdu_len: total MPDU length (including FCS)
2612 * @mpdu_offset: offset into MPDU to calculate timestamp at
2613 *
2614 * This function calculates the RX timestamp at the given MPDU offset, taking
2615 * into account what the RX timestamp was. An offset of 0 will just normalize
2616 * the timestamp to TSF at beginning of MPDU reception.
2617 */
2618 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2619 struct ieee80211_rx_status *status,
2620 unsigned int mpdu_len,
2621 unsigned int mpdu_offset)
2622 {
2623 u64 ts = status->mactime;
2624 struct rate_info ri;
2625 u16 rate;
2626
2627 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2628 return 0;
2629
2630 memset(&ri, 0, sizeof(ri));
2631
2632 /* Fill cfg80211 rate info */
2633 if (status->flag & RX_FLAG_HT) {
2634 ri.mcs = status->rate_idx;
2635 ri.flags |= RATE_INFO_FLAGS_MCS;
2636 if (status->flag & RX_FLAG_40MHZ)
2637 ri.bw = RATE_INFO_BW_40;
2638 else
2639 ri.bw = RATE_INFO_BW_20;
2640 if (status->flag & RX_FLAG_SHORT_GI)
2641 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2642 } else if (status->flag & RX_FLAG_VHT) {
2643 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2644 ri.mcs = status->rate_idx;
2645 ri.nss = status->vht_nss;
2646 if (status->flag & RX_FLAG_40MHZ)
2647 ri.bw = RATE_INFO_BW_40;
2648 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2649 ri.bw = RATE_INFO_BW_80;
2650 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2651 ri.bw = RATE_INFO_BW_160;
2652 else
2653 ri.bw = RATE_INFO_BW_20;
2654 if (status->flag & RX_FLAG_SHORT_GI)
2655 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2656 } else {
2657 struct ieee80211_supported_band *sband;
2658 int shift = 0;
2659 int bitrate;
2660
2661 if (status->flag & RX_FLAG_10MHZ) {
2662 shift = 1;
2663 ri.bw = RATE_INFO_BW_10;
2664 } else if (status->flag & RX_FLAG_5MHZ) {
2665 shift = 2;
2666 ri.bw = RATE_INFO_BW_5;
2667 } else {
2668 ri.bw = RATE_INFO_BW_20;
2669 }
2670
2671 sband = local->hw.wiphy->bands[status->band];
2672 bitrate = sband->bitrates[status->rate_idx].bitrate;
2673 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2674 }
2675
2676 rate = cfg80211_calculate_bitrate(&ri);
2677 if (WARN_ONCE(!rate,
2678 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2679 status->flag, status->rate_idx, status->vht_nss))
2680 return 0;
2681
2682 /* rewind from end of MPDU */
2683 if (status->flag & RX_FLAG_MACTIME_END)
2684 ts -= mpdu_len * 8 * 10 / rate;
2685
2686 ts += mpdu_offset * 8 * 10 / rate;
2687
2688 return ts;
2689 }
2690
2691 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2692 {
2693 struct ieee80211_sub_if_data *sdata;
2694 struct cfg80211_chan_def chandef;
2695
2696 mutex_lock(&local->mtx);
2697 mutex_lock(&local->iflist_mtx);
2698 list_for_each_entry(sdata, &local->interfaces, list) {
2699 /* it might be waiting for the local->mtx, but then
2700 * by the time it gets it, sdata->wdev.cac_started
2701 * will no longer be true
2702 */
2703 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2704
2705 if (sdata->wdev.cac_started) {
2706 chandef = sdata->vif.bss_conf.chandef;
2707 ieee80211_vif_release_channel(sdata);
2708 cfg80211_cac_event(sdata->dev,
2709 &chandef,
2710 NL80211_RADAR_CAC_ABORTED,
2711 GFP_KERNEL);
2712 }
2713 }
2714 mutex_unlock(&local->iflist_mtx);
2715 mutex_unlock(&local->mtx);
2716 }
2717
2718 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2719 {
2720 struct ieee80211_local *local =
2721 container_of(work, struct ieee80211_local, radar_detected_work);
2722 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2723 struct ieee80211_chanctx *ctx;
2724 int num_chanctx = 0;
2725
2726 mutex_lock(&local->chanctx_mtx);
2727 list_for_each_entry(ctx, &local->chanctx_list, list) {
2728 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2729 continue;
2730
2731 num_chanctx++;
2732 chandef = ctx->conf.def;
2733 }
2734 mutex_unlock(&local->chanctx_mtx);
2735
2736 ieee80211_dfs_cac_cancel(local);
2737
2738 if (num_chanctx > 1)
2739 /* XXX: multi-channel is not supported yet */
2740 WARN_ON(1);
2741 else
2742 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2743 }
2744
2745 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2746 {
2747 struct ieee80211_local *local = hw_to_local(hw);
2748
2749 trace_api_radar_detected(local);
2750
2751 ieee80211_queue_work(hw, &local->radar_detected_work);
2752 }
2753 EXPORT_SYMBOL(ieee80211_radar_detected);
2754
2755 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2756 {
2757 u32 ret;
2758 int tmp;
2759
2760 switch (c->width) {
2761 case NL80211_CHAN_WIDTH_20:
2762 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2763 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2764 break;
2765 case NL80211_CHAN_WIDTH_40:
2766 c->width = NL80211_CHAN_WIDTH_20;
2767 c->center_freq1 = c->chan->center_freq;
2768 ret = IEEE80211_STA_DISABLE_40MHZ |
2769 IEEE80211_STA_DISABLE_VHT;
2770 break;
2771 case NL80211_CHAN_WIDTH_80:
2772 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2773 /* n_P40 */
2774 tmp /= 2;
2775 /* freq_P40 */
2776 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2777 c->width = NL80211_CHAN_WIDTH_40;
2778 ret = IEEE80211_STA_DISABLE_VHT;
2779 break;
2780 case NL80211_CHAN_WIDTH_80P80:
2781 c->center_freq2 = 0;
2782 c->width = NL80211_CHAN_WIDTH_80;
2783 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2784 IEEE80211_STA_DISABLE_160MHZ;
2785 break;
2786 case NL80211_CHAN_WIDTH_160:
2787 /* n_P20 */
2788 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2789 /* n_P80 */
2790 tmp /= 4;
2791 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2792 c->width = NL80211_CHAN_WIDTH_80;
2793 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2794 IEEE80211_STA_DISABLE_160MHZ;
2795 break;
2796 default:
2797 case NL80211_CHAN_WIDTH_20_NOHT:
2798 WARN_ON_ONCE(1);
2799 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2800 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2801 break;
2802 case NL80211_CHAN_WIDTH_5:
2803 case NL80211_CHAN_WIDTH_10:
2804 WARN_ON_ONCE(1);
2805 /* keep c->width */
2806 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2807 break;
2808 }
2809
2810 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2811
2812 return ret;
2813 }
2814
2815 /*
2816 * Returns true if smps_mode_new is strictly more restrictive than
2817 * smps_mode_old.
2818 */
2819 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2820 enum ieee80211_smps_mode smps_mode_new)
2821 {
2822 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2823 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2824 return false;
2825
2826 switch (smps_mode_old) {
2827 case IEEE80211_SMPS_STATIC:
2828 return false;
2829 case IEEE80211_SMPS_DYNAMIC:
2830 return smps_mode_new == IEEE80211_SMPS_STATIC;
2831 case IEEE80211_SMPS_OFF:
2832 return smps_mode_new != IEEE80211_SMPS_OFF;
2833 default:
2834 WARN_ON(1);
2835 }
2836
2837 return false;
2838 }
2839
2840 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2841 struct cfg80211_csa_settings *csa_settings)
2842 {
2843 struct sk_buff *skb;
2844 struct ieee80211_mgmt *mgmt;
2845 struct ieee80211_local *local = sdata->local;
2846 int freq;
2847 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2848 sizeof(mgmt->u.action.u.chan_switch);
2849 u8 *pos;
2850
2851 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2852 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2853 return -EOPNOTSUPP;
2854
2855 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2856 5 + /* channel switch announcement element */
2857 3 + /* secondary channel offset element */
2858 8); /* mesh channel switch parameters element */
2859 if (!skb)
2860 return -ENOMEM;
2861
2862 skb_reserve(skb, local->tx_headroom);
2863 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2864 memset(mgmt, 0, hdr_len);
2865 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2866 IEEE80211_STYPE_ACTION);
2867
2868 eth_broadcast_addr(mgmt->da);
2869 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2870 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2871 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2872 } else {
2873 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2874 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2875 }
2876 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2877 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2878 pos = skb_put(skb, 5);
2879 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2880 *pos++ = 3; /* IE length */
2881 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2882 freq = csa_settings->chandef.chan->center_freq;
2883 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2884 *pos++ = csa_settings->count; /* count */
2885
2886 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2887 enum nl80211_channel_type ch_type;
2888
2889 skb_put(skb, 3);
2890 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2891 *pos++ = 1; /* IE length */
2892 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2893 if (ch_type == NL80211_CHAN_HT40PLUS)
2894 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2895 else
2896 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2897 }
2898
2899 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2900 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2901
2902 skb_put(skb, 8);
2903 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2904 *pos++ = 6; /* IE length */
2905 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2906 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2907 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2908 *pos++ |= csa_settings->block_tx ?
2909 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2910 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2911 pos += 2;
2912 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2913 pos += 2;
2914 }
2915
2916 ieee80211_tx_skb(sdata, skb);
2917 return 0;
2918 }
2919
2920 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2921 {
2922 return !(cs == NULL || cs->cipher == 0 ||
2923 cs->hdr_len < cs->pn_len + cs->pn_off ||
2924 cs->hdr_len <= cs->key_idx_off ||
2925 cs->key_idx_shift > 7 ||
2926 cs->key_idx_mask == 0);
2927 }
2928
2929 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2930 {
2931 int i;
2932
2933 /* Ensure we have enough iftype bitmap space for all iftype values */
2934 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2935
2936 for (i = 0; i < n; i++)
2937 if (!ieee80211_cs_valid(&cs[i]))
2938 return false;
2939
2940 return true;
2941 }
2942
2943 const struct ieee80211_cipher_scheme *
2944 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2945 enum nl80211_iftype iftype)
2946 {
2947 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2948 int n = local->hw.n_cipher_schemes;
2949 int i;
2950 const struct ieee80211_cipher_scheme *cs = NULL;
2951
2952 for (i = 0; i < n; i++) {
2953 if (l[i].cipher == cipher) {
2954 cs = &l[i];
2955 break;
2956 }
2957 }
2958
2959 if (!cs || !(cs->iftype & BIT(iftype)))
2960 return NULL;
2961
2962 return cs;
2963 }
2964
2965 int ieee80211_cs_headroom(struct ieee80211_local *local,
2966 struct cfg80211_crypto_settings *crypto,
2967 enum nl80211_iftype iftype)
2968 {
2969 const struct ieee80211_cipher_scheme *cs;
2970 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2971 int i;
2972
2973 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2974 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2975 iftype);
2976
2977 if (cs && headroom < cs->hdr_len)
2978 headroom = cs->hdr_len;
2979 }
2980
2981 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2982 if (cs && headroom < cs->hdr_len)
2983 headroom = cs->hdr_len;
2984
2985 return headroom;
2986 }
2987
2988 static bool
2989 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2990 {
2991 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2992 int skip;
2993
2994 if (end > 0)
2995 return false;
2996
2997 /* One shot NOA */
2998 if (data->count[i] == 1)
2999 return false;
3000
3001 if (data->desc[i].interval == 0)
3002 return false;
3003
3004 /* End time is in the past, check for repetitions */
3005 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3006 if (data->count[i] < 255) {
3007 if (data->count[i] <= skip) {
3008 data->count[i] = 0;
3009 return false;
3010 }
3011
3012 data->count[i] -= skip;
3013 }
3014
3015 data->desc[i].start += skip * data->desc[i].interval;
3016
3017 return true;
3018 }
3019
3020 static bool
3021 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3022 s32 *offset)
3023 {
3024 bool ret = false;
3025 int i;
3026
3027 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3028 s32 cur;
3029
3030 if (!data->count[i])
3031 continue;
3032
3033 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3034 ret = true;
3035
3036 cur = data->desc[i].start - tsf;
3037 if (cur > *offset)
3038 continue;
3039
3040 cur = data->desc[i].start + data->desc[i].duration - tsf;
3041 if (cur > *offset)
3042 *offset = cur;
3043 }
3044
3045 return ret;
3046 }
3047
3048 static u32
3049 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3050 {
3051 s32 offset = 0;
3052 int tries = 0;
3053 /*
3054 * arbitrary limit, used to avoid infinite loops when combined NoA
3055 * descriptors cover the full time period.
3056 */
3057 int max_tries = 5;
3058
3059 ieee80211_extend_absent_time(data, tsf, &offset);
3060 do {
3061 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3062 break;
3063
3064 tries++;
3065 } while (tries < max_tries);
3066
3067 return offset;
3068 }
3069
3070 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3071 {
3072 u32 next_offset = BIT(31) - 1;
3073 int i;
3074
3075 data->absent = 0;
3076 data->has_next_tsf = false;
3077 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3078 s32 start;
3079
3080 if (!data->count[i])
3081 continue;
3082
3083 ieee80211_extend_noa_desc(data, tsf, i);
3084 start = data->desc[i].start - tsf;
3085 if (start <= 0)
3086 data->absent |= BIT(i);
3087
3088 if (next_offset > start)
3089 next_offset = start;
3090
3091 data->has_next_tsf = true;
3092 }
3093
3094 if (data->absent)
3095 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3096
3097 data->next_tsf = tsf + next_offset;
3098 }
3099 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3100
3101 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3102 struct ieee80211_noa_data *data, u32 tsf)
3103 {
3104 int ret = 0;
3105 int i;
3106
3107 memset(data, 0, sizeof(*data));
3108
3109 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3110 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3111
3112 if (!desc->count || !desc->duration)
3113 continue;
3114
3115 data->count[i] = desc->count;
3116 data->desc[i].start = le32_to_cpu(desc->start_time);
3117 data->desc[i].duration = le32_to_cpu(desc->duration);
3118 data->desc[i].interval = le32_to_cpu(desc->interval);
3119
3120 if (data->count[i] > 1 &&
3121 data->desc[i].interval < data->desc[i].duration)
3122 continue;
3123
3124 ieee80211_extend_noa_desc(data, tsf, i);
3125 ret++;
3126 }
3127
3128 if (ret)
3129 ieee80211_update_p2p_noa(data, tsf);
3130
3131 return ret;
3132 }
3133 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3134
3135 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3136 struct ieee80211_sub_if_data *sdata)
3137 {
3138 u64 tsf = drv_get_tsf(local, sdata);
3139 u64 dtim_count = 0;
3140 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3141 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3142 struct ps_data *ps;
3143 u8 bcns_from_dtim;
3144
3145 if (tsf == -1ULL || !beacon_int || !dtim_period)
3146 return;
3147
3148 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3149 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3150 if (!sdata->bss)
3151 return;
3152
3153 ps = &sdata->bss->ps;
3154 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3155 ps = &sdata->u.mesh.ps;
3156 } else {
3157 return;
3158 }
3159
3160 /*
3161 * actually finds last dtim_count, mac80211 will update in
3162 * __beacon_add_tim().
3163 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3164 */
3165 do_div(tsf, beacon_int);
3166 bcns_from_dtim = do_div(tsf, dtim_period);
3167 /* just had a DTIM */
3168 if (!bcns_from_dtim)
3169 dtim_count = 0;
3170 else
3171 dtim_count = dtim_period - bcns_from_dtim;
3172
3173 ps->dtim_count = dtim_count;
3174 }
3175
3176 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3177 struct ieee80211_chanctx *ctx)
3178 {
3179 struct ieee80211_sub_if_data *sdata;
3180 u8 radar_detect = 0;
3181
3182 lockdep_assert_held(&local->chanctx_mtx);
3183
3184 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3185 return 0;
3186
3187 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3188 if (sdata->reserved_radar_required)
3189 radar_detect |= BIT(sdata->reserved_chandef.width);
3190
3191 /*
3192 * An in-place reservation context should not have any assigned vifs
3193 * until it replaces the other context.
3194 */
3195 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3196 !list_empty(&ctx->assigned_vifs));
3197
3198 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3199 if (sdata->radar_required)
3200 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3201
3202 return radar_detect;
3203 }
3204
3205 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3206 const struct cfg80211_chan_def *chandef,
3207 enum ieee80211_chanctx_mode chanmode,
3208 u8 radar_detect)
3209 {
3210 struct ieee80211_local *local = sdata->local;
3211 struct ieee80211_sub_if_data *sdata_iter;
3212 enum nl80211_iftype iftype = sdata->wdev.iftype;
3213 int num[NUM_NL80211_IFTYPES];
3214 struct ieee80211_chanctx *ctx;
3215 int num_different_channels = 0;
3216 int total = 1;
3217
3218 lockdep_assert_held(&local->chanctx_mtx);
3219
3220 if (WARN_ON(hweight32(radar_detect) > 1))
3221 return -EINVAL;
3222
3223 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3224 !chandef->chan))
3225 return -EINVAL;
3226
3227 if (chandef)
3228 num_different_channels = 1;
3229
3230 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3231 return -EINVAL;
3232
3233 /* Always allow software iftypes */
3234 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3235 if (radar_detect)
3236 return -EINVAL;
3237 return 0;
3238 }
3239
3240 memset(num, 0, sizeof(num));
3241
3242 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3243 num[iftype] = 1;
3244
3245 list_for_each_entry(ctx, &local->chanctx_list, list) {
3246 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3247 continue;
3248 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3249 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3250 num_different_channels++;
3251 continue;
3252 }
3253 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3254 cfg80211_chandef_compatible(chandef,
3255 &ctx->conf.def))
3256 continue;
3257 num_different_channels++;
3258 }
3259
3260 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3261 struct wireless_dev *wdev_iter;
3262
3263 wdev_iter = &sdata_iter->wdev;
3264
3265 if (sdata_iter == sdata ||
3266 !ieee80211_sdata_running(sdata_iter) ||
3267 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3268 continue;
3269
3270 num[wdev_iter->iftype]++;
3271 total++;
3272 }
3273
3274 if (total == 1 && !radar_detect)
3275 return 0;
3276
3277 return cfg80211_check_combinations(local->hw.wiphy,
3278 num_different_channels,
3279 radar_detect, num);
3280 }
3281
3282 static void
3283 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3284 void *data)
3285 {
3286 u32 *max_num_different_channels = data;
3287
3288 *max_num_different_channels = max(*max_num_different_channels,
3289 c->num_different_channels);
3290 }
3291
3292 int ieee80211_max_num_channels(struct ieee80211_local *local)
3293 {
3294 struct ieee80211_sub_if_data *sdata;
3295 int num[NUM_NL80211_IFTYPES] = {};
3296 struct ieee80211_chanctx *ctx;
3297 int num_different_channels = 0;
3298 u8 radar_detect = 0;
3299 u32 max_num_different_channels = 1;
3300 int err;
3301
3302 lockdep_assert_held(&local->chanctx_mtx);
3303
3304 list_for_each_entry(ctx, &local->chanctx_list, list) {
3305 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3306 continue;
3307
3308 num_different_channels++;
3309
3310 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3311 }
3312
3313 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3314 num[sdata->wdev.iftype]++;
3315
3316 err = cfg80211_iter_combinations(local->hw.wiphy,
3317 num_different_channels, radar_detect,
3318 num, ieee80211_iter_max_chans,
3319 &max_num_different_channels);
3320 if (err < 0)
3321 return err;
3322
3323 return max_num_different_channels;
3324 }
3325
3326 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3327 {
3328 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3329 *buf++ = 7; /* len */
3330 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3331 *buf++ = 0x50;
3332 *buf++ = 0xf2;
3333 *buf++ = 2; /* WME */
3334 *buf++ = 0; /* WME info */
3335 *buf++ = 1; /* WME ver */
3336 *buf++ = qosinfo; /* U-APSD no in use */
3337
3338 return buf;
3339 }
3340
3341 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3342 struct sta_info *sta,
3343 struct txq_info *txqi, int tid)
3344 {
3345 skb_queue_head_init(&txqi->queue);
3346 txqi->txq.vif = &sdata->vif;
3347
3348 if (sta) {
3349 txqi->txq.sta = &sta->sta;
3350 sta->sta.txq[tid] = &txqi->txq;
3351 txqi->txq.tid = tid;
3352 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3353 } else {
3354 sdata->vif.txq = &txqi->txq;
3355 txqi->txq.tid = 0;
3356 txqi->txq.ac = IEEE80211_AC_BE;
3357 }
3358 }
Linux kernel - Deliverables
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