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perf bpf: Move perf_event_output() from stdio.h to bpf.h
[linux/fpc-iii.git] / net / mac80211 / util.c
blobbec424316ea40e245e6b30262c016547d0ad027f
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) 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018 Intel Corporation
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * utilities for mac80211
15 */
16
17 #include <net/mac80211.h>
18 #include <linux/netdevice.h>
19 #include <linux/export.h>
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/bitmap.h>
26 #include <linux/crc32.h>
27 #include <net/net_namespace.h>
28 #include <net/cfg80211.h>
29 #include <net/rtnetlink.h>
30
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
33 #include "rate.h"
34 #include "mesh.h"
35 #include "wme.h"
36 #include "led.h"
37 #include "wep.h"
38
39 /* privid for wiphys to determine whether they belong to us or not */
40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41
42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43 {
44 struct ieee80211_local *local;
45 BUG_ON(!wiphy);
46
47 local = wiphy_priv(wiphy);
48 return &local->hw;
49 }
50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51
52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
53 {
54 struct sk_buff *skb;
55 struct ieee80211_hdr *hdr;
56
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
60 }
61 }
62
63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
65 int shift)
66 {
67 int dur;
68
69 /* calculate duration (in microseconds, rounded up to next higher
70 * integer if it includes a fractional microsecond) to send frame of
71 * len bytes (does not include FCS) at the given rate. Duration will
72 * also include SIFS.
73 *
74 * rate is in 100 kbps, so divident is multiplied by 10 in the
75 * DIV_ROUND_UP() operations.
76 *
77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
78 * is assumed to be 0 otherwise.
79 */
80
81 if (band == NL80211_BAND_5GHZ || erp) {
82 /*
83 * OFDM:
84 *
85 * N_DBPS = DATARATE x 4
86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
87 * (16 = SIGNAL time, 6 = tail bits)
88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
89 *
90 * T_SYM = 4 usec
91 * 802.11a - 18.5.2: aSIFSTime = 16 usec
92 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
93 * signal ext = 6 usec
94 */
95 dur = 16; /* SIFS + signal ext */
96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98
99 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 4 for 5 MHz
101 * * times 2 for 10 MHz
102 */
103 dur *= 1 << shift;
104
105 /* rates should already consider the channel bandwidth,
106 * don't apply divisor again.
107 */
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate); /* T_SYM x N_SYM */
110 } else {
111 /*
112 * 802.11b or 802.11g with 802.11b compatibility:
113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 *
116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117 * aSIFSTime = 10 usec
118 * aPreambleLength = 144 usec or 72 usec with short preamble
119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 */
121 dur = 10; /* aSIFSTime = 10 usec */
122 dur += short_preamble ? (72 + 24) : (144 + 48);
123
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
125 }
126
127 return dur;
128 }
129
130 /* Exported duration function for driver use */
131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
134 size_t frame_len,
135 struct ieee80211_rate *rate)
136 {
137 struct ieee80211_sub_if_data *sdata;
138 u16 dur;
139 int erp, shift = 0;
140 bool short_preamble = false;
141
142 erp = 0;
143 if (vif) {
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
149 }
150
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
153
154 return cpu_to_le16(dur);
155 }
156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157
158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
161 {
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
165 bool short_preamble;
166 int erp, shift = 0, bitrate;
167 u16 dur;
168 struct ieee80211_supported_band *sband;
169
170 sband = local->hw.wiphy->bands[frame_txctl->band];
171
172 short_preamble = false;
173
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
175
176 erp = 0;
177 if (vif) {
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
183 }
184
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
186
187 /* CTS duration */
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190 /* Data frame duration */
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
193 /* ACK duration */
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
196
197 return cpu_to_le16(dur);
198 }
199 EXPORT_SYMBOL(ieee80211_rts_duration);
200
201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
203 size_t frame_len,
204 const struct ieee80211_tx_info *frame_txctl)
205 {
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
209 bool short_preamble;
210 int erp, shift = 0, bitrate;
211 u16 dur;
212 struct ieee80211_supported_band *sband;
213
214 sband = local->hw.wiphy->bands[frame_txctl->band];
215
216 short_preamble = false;
217
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
219 erp = 0;
220 if (vif) {
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
226 }
227
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229
230 /* Data frame duration */
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234 /* ACK duration */
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 }
238
239 return cpu_to_le16(dur);
240 }
241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242
243 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
244 {
245 struct ieee80211_local *local = sdata->local;
246 struct ieee80211_vif *vif = &sdata->vif;
247 struct fq *fq = &local->fq;
248 struct ps_data *ps = NULL;
249 struct txq_info *txqi;
250 struct sta_info *sta;
251 int i;
252
253 spin_lock_bh(&fq->lock);
254
255 if (sdata->vif.type == NL80211_IFTYPE_AP)
256 ps = &sdata->bss->ps;
257
258 sdata->vif.txqs_stopped[ac] = false;
259
260 list_for_each_entry_rcu(sta, &local->sta_list, list) {
261 if (sdata != sta->sdata)
262 continue;
263
264 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
265 struct ieee80211_txq *txq = sta->sta.txq[i];
266
267 if (!txq)
268 continue;
269
270 txqi = to_txq_info(txq);
271
272 if (ac != txq->ac)
273 continue;
274
275 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
276 &txqi->flags))
277 continue;
278
279 spin_unlock_bh(&fq->lock);
280 drv_wake_tx_queue(local, txqi);
281 spin_lock_bh(&fq->lock);
282 }
283 }
284
285 if (!vif->txq)
286 goto out;
287
288 txqi = to_txq_info(vif->txq);
289
290 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
291 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
292 goto out;
293
294 spin_unlock_bh(&fq->lock);
295
296 drv_wake_tx_queue(local, txqi);
297 return;
298 out:
299 spin_unlock_bh(&fq->lock);
300 }
301
302 void ieee80211_wake_txqs(unsigned long data)
303 {
304 struct ieee80211_local *local = (struct ieee80211_local *)data;
305 struct ieee80211_sub_if_data *sdata;
306 int n_acs = IEEE80211_NUM_ACS;
307 unsigned long flags;
308 int i;
309
310 rcu_read_lock();
311 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
312
313 if (local->hw.queues < IEEE80211_NUM_ACS)
314 n_acs = 1;
315
316 for (i = 0; i < local->hw.queues; i++) {
317 if (local->queue_stop_reasons[i])
318 continue;
319
320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
321 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
322 int ac;
323
324 for (ac = 0; ac < n_acs; ac++) {
325 int ac_queue = sdata->vif.hw_queue[ac];
326
327 if (ac_queue == i ||
328 sdata->vif.cab_queue == i)
329 __ieee80211_wake_txqs(sdata, ac);
330 }
331 }
332 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
333 }
334
335 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
336 rcu_read_unlock();
337 }
338
339 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
340 {
341 struct ieee80211_sub_if_data *sdata;
342 int n_acs = IEEE80211_NUM_ACS;
343
344 if (local->ops->wake_tx_queue)
345 return;
346
347 if (local->hw.queues < IEEE80211_NUM_ACS)
348 n_acs = 1;
349
350 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
351 int ac;
352
353 if (!sdata->dev)
354 continue;
355
356 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
357 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
358 continue;
359
360 for (ac = 0; ac < n_acs; ac++) {
361 int ac_queue = sdata->vif.hw_queue[ac];
362
363 if (ac_queue == queue ||
364 (sdata->vif.cab_queue == queue &&
365 local->queue_stop_reasons[ac_queue] == 0 &&
366 skb_queue_empty(&local->pending[ac_queue])))
367 netif_wake_subqueue(sdata->dev, ac);
368 }
369 }
370 }
371
372 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
373 enum queue_stop_reason reason,
374 bool refcounted)
375 {
376 struct ieee80211_local *local = hw_to_local(hw);
377
378 trace_wake_queue(local, queue, reason);
379
380 if (WARN_ON(queue >= hw->queues))
381 return;
382
383 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
384 return;
385
386 if (!refcounted) {
387 local->q_stop_reasons[queue][reason] = 0;
388 } else {
389 local->q_stop_reasons[queue][reason]--;
390 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
391 local->q_stop_reasons[queue][reason] = 0;
392 }
393
394 if (local->q_stop_reasons[queue][reason] == 0)
395 __clear_bit(reason, &local->queue_stop_reasons[queue]);
396
397 if (local->queue_stop_reasons[queue] != 0)
398 /* someone still has this queue stopped */
399 return;
400
401 if (skb_queue_empty(&local->pending[queue])) {
402 rcu_read_lock();
403 ieee80211_propagate_queue_wake(local, queue);
404 rcu_read_unlock();
405 } else
406 tasklet_schedule(&local->tx_pending_tasklet);
407
408 if (local->ops->wake_tx_queue)
409 tasklet_schedule(&local->wake_txqs_tasklet);
410 }
411
412 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
413 enum queue_stop_reason reason,
414 bool refcounted)
415 {
416 struct ieee80211_local *local = hw_to_local(hw);
417 unsigned long flags;
418
419 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
420 __ieee80211_wake_queue(hw, queue, reason, refcounted);
421 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
422 }
423
424 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
425 {
426 ieee80211_wake_queue_by_reason(hw, queue,
427 IEEE80211_QUEUE_STOP_REASON_DRIVER,
428 false);
429 }
430 EXPORT_SYMBOL(ieee80211_wake_queue);
431
432 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
433 enum queue_stop_reason reason,
434 bool refcounted)
435 {
436 struct ieee80211_local *local = hw_to_local(hw);
437 struct ieee80211_sub_if_data *sdata;
438 int n_acs = IEEE80211_NUM_ACS;
439
440 trace_stop_queue(local, queue, reason);
441
442 if (WARN_ON(queue >= hw->queues))
443 return;
444
445 if (!refcounted)
446 local->q_stop_reasons[queue][reason] = 1;
447 else
448 local->q_stop_reasons[queue][reason]++;
449
450 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
451 return;
452
453 if (local->hw.queues < IEEE80211_NUM_ACS)
454 n_acs = 1;
455
456 rcu_read_lock();
457 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
458 int ac;
459
460 if (!sdata->dev)
461 continue;
462
463 for (ac = 0; ac < n_acs; ac++) {
464 if (sdata->vif.hw_queue[ac] == queue ||
465 sdata->vif.cab_queue == queue) {
466 if (!local->ops->wake_tx_queue) {
467 netif_stop_subqueue(sdata->dev, ac);
468 continue;
469 }
470 spin_lock(&local->fq.lock);
471 sdata->vif.txqs_stopped[ac] = true;
472 spin_unlock(&local->fq.lock);
473 }
474 }
475 }
476 rcu_read_unlock();
477 }
478
479 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
480 enum queue_stop_reason reason,
481 bool refcounted)
482 {
483 struct ieee80211_local *local = hw_to_local(hw);
484 unsigned long flags;
485
486 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487 __ieee80211_stop_queue(hw, queue, reason, refcounted);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 }
490
491 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
492 {
493 ieee80211_stop_queue_by_reason(hw, queue,
494 IEEE80211_QUEUE_STOP_REASON_DRIVER,
495 false);
496 }
497 EXPORT_SYMBOL(ieee80211_stop_queue);
498
499 void ieee80211_add_pending_skb(struct ieee80211_local *local,
500 struct sk_buff *skb)
501 {
502 struct ieee80211_hw *hw = &local->hw;
503 unsigned long flags;
504 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
505 int queue = info->hw_queue;
506
507 if (WARN_ON(!info->control.vif)) {
508 ieee80211_free_txskb(&local->hw, skb);
509 return;
510 }
511
512 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
513 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
514 false);
515 __skb_queue_tail(&local->pending[queue], skb);
516 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
517 false);
518 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
519 }
520
521 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
522 struct sk_buff_head *skbs)
523 {
524 struct ieee80211_hw *hw = &local->hw;
525 struct sk_buff *skb;
526 unsigned long flags;
527 int queue, i;
528
529 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
530 while ((skb = skb_dequeue(skbs))) {
531 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
532
533 if (WARN_ON(!info->control.vif)) {
534 ieee80211_free_txskb(&local->hw, skb);
535 continue;
536 }
537
538 queue = info->hw_queue;
539
540 __ieee80211_stop_queue(hw, queue,
541 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
542 false);
543
544 __skb_queue_tail(&local->pending[queue], skb);
545 }
546
547 for (i = 0; i < hw->queues; i++)
548 __ieee80211_wake_queue(hw, i,
549 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
550 false);
551 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
552 }
553
554 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
555 unsigned long queues,
556 enum queue_stop_reason reason,
557 bool refcounted)
558 {
559 struct ieee80211_local *local = hw_to_local(hw);
560 unsigned long flags;
561 int i;
562
563 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
564
565 for_each_set_bit(i, &queues, hw->queues)
566 __ieee80211_stop_queue(hw, i, reason, refcounted);
567
568 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
569 }
570
571 void ieee80211_stop_queues(struct ieee80211_hw *hw)
572 {
573 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
574 IEEE80211_QUEUE_STOP_REASON_DRIVER,
575 false);
576 }
577 EXPORT_SYMBOL(ieee80211_stop_queues);
578
579 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
580 {
581 struct ieee80211_local *local = hw_to_local(hw);
582 unsigned long flags;
583 int ret;
584
585 if (WARN_ON(queue >= hw->queues))
586 return true;
587
588 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
589 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
590 &local->queue_stop_reasons[queue]);
591 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
592 return ret;
593 }
594 EXPORT_SYMBOL(ieee80211_queue_stopped);
595
596 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
597 unsigned long queues,
598 enum queue_stop_reason reason,
599 bool refcounted)
600 {
601 struct ieee80211_local *local = hw_to_local(hw);
602 unsigned long flags;
603 int i;
604
605 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
606
607 for_each_set_bit(i, &queues, hw->queues)
608 __ieee80211_wake_queue(hw, i, reason, refcounted);
609
610 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
611 }
612
613 void ieee80211_wake_queues(struct ieee80211_hw *hw)
614 {
615 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
616 IEEE80211_QUEUE_STOP_REASON_DRIVER,
617 false);
618 }
619 EXPORT_SYMBOL(ieee80211_wake_queues);
620
621 static unsigned int
622 ieee80211_get_vif_queues(struct ieee80211_local *local,
623 struct ieee80211_sub_if_data *sdata)
624 {
625 unsigned int queues;
626
627 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
628 int ac;
629
630 queues = 0;
631
632 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
633 queues |= BIT(sdata->vif.hw_queue[ac]);
634 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
635 queues |= BIT(sdata->vif.cab_queue);
636 } else {
637 /* all queues */
638 queues = BIT(local->hw.queues) - 1;
639 }
640
641 return queues;
642 }
643
644 void __ieee80211_flush_queues(struct ieee80211_local *local,
645 struct ieee80211_sub_if_data *sdata,
646 unsigned int queues, bool drop)
647 {
648 if (!local->ops->flush)
649 return;
650
651 /*
652 * If no queue was set, or if the HW doesn't support
653 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
654 */
655 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
656 queues = ieee80211_get_vif_queues(local, sdata);
657
658 ieee80211_stop_queues_by_reason(&local->hw, queues,
659 IEEE80211_QUEUE_STOP_REASON_FLUSH,
660 false);
661
662 drv_flush(local, sdata, queues, drop);
663
664 ieee80211_wake_queues_by_reason(&local->hw, queues,
665 IEEE80211_QUEUE_STOP_REASON_FLUSH,
666 false);
667 }
668
669 void ieee80211_flush_queues(struct ieee80211_local *local,
670 struct ieee80211_sub_if_data *sdata, bool drop)
671 {
672 __ieee80211_flush_queues(local, sdata, 0, drop);
673 }
674
675 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
676 struct ieee80211_sub_if_data *sdata,
677 enum queue_stop_reason reason)
678 {
679 ieee80211_stop_queues_by_reason(&local->hw,
680 ieee80211_get_vif_queues(local, sdata),
681 reason, true);
682 }
683
684 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
685 struct ieee80211_sub_if_data *sdata,
686 enum queue_stop_reason reason)
687 {
688 ieee80211_wake_queues_by_reason(&local->hw,
689 ieee80211_get_vif_queues(local, sdata),
690 reason, true);
691 }
692
693 static void __iterate_interfaces(struct ieee80211_local *local,
694 u32 iter_flags,
695 void (*iterator)(void *data, u8 *mac,
696 struct ieee80211_vif *vif),
697 void *data)
698 {
699 struct ieee80211_sub_if_data *sdata;
700 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
701
702 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
703 switch (sdata->vif.type) {
704 case NL80211_IFTYPE_MONITOR:
705 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
706 continue;
707 break;
708 case NL80211_IFTYPE_AP_VLAN:
709 continue;
710 default:
711 break;
712 }
713 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
714 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
715 continue;
716 if (ieee80211_sdata_running(sdata) || !active_only)
717 iterator(data, sdata->vif.addr,
718 &sdata->vif);
719 }
720
721 sdata = rcu_dereference_check(local->monitor_sdata,
722 lockdep_is_held(&local->iflist_mtx) ||
723 lockdep_rtnl_is_held());
724 if (sdata &&
725 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
726 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
727 iterator(data, sdata->vif.addr, &sdata->vif);
728 }
729
730 void ieee80211_iterate_interfaces(
731 struct ieee80211_hw *hw, u32 iter_flags,
732 void (*iterator)(void *data, u8 *mac,
733 struct ieee80211_vif *vif),
734 void *data)
735 {
736 struct ieee80211_local *local = hw_to_local(hw);
737
738 mutex_lock(&local->iflist_mtx);
739 __iterate_interfaces(local, iter_flags, iterator, data);
740 mutex_unlock(&local->iflist_mtx);
741 }
742 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
743
744 void ieee80211_iterate_active_interfaces_atomic(
745 struct ieee80211_hw *hw, u32 iter_flags,
746 void (*iterator)(void *data, u8 *mac,
747 struct ieee80211_vif *vif),
748 void *data)
749 {
750 struct ieee80211_local *local = hw_to_local(hw);
751
752 rcu_read_lock();
753 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
754 iterator, data);
755 rcu_read_unlock();
756 }
757 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
758
759 void ieee80211_iterate_active_interfaces_rtnl(
760 struct ieee80211_hw *hw, u32 iter_flags,
761 void (*iterator)(void *data, u8 *mac,
762 struct ieee80211_vif *vif),
763 void *data)
764 {
765 struct ieee80211_local *local = hw_to_local(hw);
766
767 ASSERT_RTNL();
768
769 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
770 iterator, data);
771 }
772 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
773
774 static void __iterate_stations(struct ieee80211_local *local,
775 void (*iterator)(void *data,
776 struct ieee80211_sta *sta),
777 void *data)
778 {
779 struct sta_info *sta;
780
781 list_for_each_entry_rcu(sta, &local->sta_list, list) {
782 if (!sta->uploaded)
783 continue;
784
785 iterator(data, &sta->sta);
786 }
787 }
788
789 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
790 void (*iterator)(void *data,
791 struct ieee80211_sta *sta),
792 void *data)
793 {
794 struct ieee80211_local *local = hw_to_local(hw);
795
796 rcu_read_lock();
797 __iterate_stations(local, iterator, data);
798 rcu_read_unlock();
799 }
800 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
801
802 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
803 {
804 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
805
806 if (!ieee80211_sdata_running(sdata) ||
807 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
808 return NULL;
809 return &sdata->vif;
810 }
811 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
812
813 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
814 {
815 struct ieee80211_sub_if_data *sdata;
816
817 if (!vif)
818 return NULL;
819
820 sdata = vif_to_sdata(vif);
821
822 if (!ieee80211_sdata_running(sdata) ||
823 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
824 return NULL;
825
826 return &sdata->wdev;
827 }
828 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
829
830 /*
831 * Nothing should have been stuffed into the workqueue during
832 * the suspend->resume cycle. Since we can't check each caller
833 * of this function if we are already quiescing / suspended,
834 * check here and don't WARN since this can actually happen when
835 * the rx path (for example) is racing against __ieee80211_suspend
836 * and suspending / quiescing was set after the rx path checked
837 * them.
838 */
839 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
840 {
841 if (local->quiescing || (local->suspended && !local->resuming)) {
842 pr_warn("queueing ieee80211 work while going to suspend\n");
843 return false;
844 }
845
846 return true;
847 }
848
849 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
850 {
851 struct ieee80211_local *local = hw_to_local(hw);
852
853 if (!ieee80211_can_queue_work(local))
854 return;
855
856 queue_work(local->workqueue, work);
857 }
858 EXPORT_SYMBOL(ieee80211_queue_work);
859
860 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
861 struct delayed_work *dwork,
862 unsigned long delay)
863 {
864 struct ieee80211_local *local = hw_to_local(hw);
865
866 if (!ieee80211_can_queue_work(local))
867 return;
868
869 queue_delayed_work(local->workqueue, dwork, delay);
870 }
871 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
872
873 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
874 struct ieee802_11_elems *elems,
875 u64 filter, u32 crc)
876 {
877 size_t left = len;
878 const u8 *pos = start;
879 bool calc_crc = filter != 0;
880 DECLARE_BITMAP(seen_elems, 256);
881 const u8 *ie;
882
883 bitmap_zero(seen_elems, 256);
884 memset(elems, 0, sizeof(*elems));
885 elems->ie_start = start;
886 elems->total_len = len;
887
888 while (left >= 2) {
889 u8 id, elen;
890 bool elem_parse_failed;
891
892 id = *pos++;
893 elen = *pos++;
894 left -= 2;
895
896 if (elen > left) {
897 elems->parse_error = true;
898 break;
899 }
900
901 switch (id) {
902 case WLAN_EID_SSID:
903 case WLAN_EID_SUPP_RATES:
904 case WLAN_EID_FH_PARAMS:
905 case WLAN_EID_DS_PARAMS:
906 case WLAN_EID_CF_PARAMS:
907 case WLAN_EID_TIM:
908 case WLAN_EID_IBSS_PARAMS:
909 case WLAN_EID_CHALLENGE:
910 case WLAN_EID_RSN:
911 case WLAN_EID_ERP_INFO:
912 case WLAN_EID_EXT_SUPP_RATES:
913 case WLAN_EID_HT_CAPABILITY:
914 case WLAN_EID_HT_OPERATION:
915 case WLAN_EID_VHT_CAPABILITY:
916 case WLAN_EID_VHT_OPERATION:
917 case WLAN_EID_MESH_ID:
918 case WLAN_EID_MESH_CONFIG:
919 case WLAN_EID_PEER_MGMT:
920 case WLAN_EID_PREQ:
921 case WLAN_EID_PREP:
922 case WLAN_EID_PERR:
923 case WLAN_EID_RANN:
924 case WLAN_EID_CHANNEL_SWITCH:
925 case WLAN_EID_EXT_CHANSWITCH_ANN:
926 case WLAN_EID_COUNTRY:
927 case WLAN_EID_PWR_CONSTRAINT:
928 case WLAN_EID_TIMEOUT_INTERVAL:
929 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
930 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
931 case WLAN_EID_CHAN_SWITCH_PARAM:
932 case WLAN_EID_EXT_CAPABILITY:
933 case WLAN_EID_CHAN_SWITCH_TIMING:
934 case WLAN_EID_LINK_ID:
935 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
936 /*
937 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
938 * that if the content gets bigger it might be needed more than once
939 */
940 if (test_bit(id, seen_elems)) {
941 elems->parse_error = true;
942 left -= elen;
943 pos += elen;
944 continue;
945 }
946 break;
947 }
948
949 if (calc_crc && id < 64 && (filter & (1ULL << id)))
950 crc = crc32_be(crc, pos - 2, elen + 2);
951
952 elem_parse_failed = false;
953
954 switch (id) {
955 case WLAN_EID_LINK_ID:
956 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
957 elem_parse_failed = true;
958 break;
959 }
960 elems->lnk_id = (void *)(pos - 2);
961 break;
962 case WLAN_EID_CHAN_SWITCH_TIMING:
963 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
964 elem_parse_failed = true;
965 break;
966 }
967 elems->ch_sw_timing = (void *)pos;
968 break;
969 case WLAN_EID_EXT_CAPABILITY:
970 elems->ext_capab = pos;
971 elems->ext_capab_len = elen;
972 break;
973 case WLAN_EID_SSID:
974 elems->ssid = pos;
975 elems->ssid_len = elen;
976 break;
977 case WLAN_EID_SUPP_RATES:
978 elems->supp_rates = pos;
979 elems->supp_rates_len = elen;
980 break;
981 case WLAN_EID_DS_PARAMS:
982 if (elen >= 1)
983 elems->ds_params = pos;
984 else
985 elem_parse_failed = true;
986 break;
987 case WLAN_EID_TIM:
988 if (elen >= sizeof(struct ieee80211_tim_ie)) {
989 elems->tim = (void *)pos;
990 elems->tim_len = elen;
991 } else
992 elem_parse_failed = true;
993 break;
994 case WLAN_EID_CHALLENGE:
995 elems->challenge = pos;
996 elems->challenge_len = elen;
997 break;
998 case WLAN_EID_VENDOR_SPECIFIC:
999 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1000 pos[2] == 0xf2) {
1001 /* Microsoft OUI (00:50:F2) */
1002
1003 if (calc_crc)
1004 crc = crc32_be(crc, pos - 2, elen + 2);
1005
1006 if (elen >= 5 && pos[3] == 2) {
1007 /* OUI Type 2 - WMM IE */
1008 if (pos[4] == 0) {
1009 elems->wmm_info = pos;
1010 elems->wmm_info_len = elen;
1011 } else if (pos[4] == 1) {
1012 elems->wmm_param = pos;
1013 elems->wmm_param_len = elen;
1014 }
1015 }
1016 }
1017 break;
1018 case WLAN_EID_RSN:
1019 elems->rsn = pos;
1020 elems->rsn_len = elen;
1021 break;
1022 case WLAN_EID_ERP_INFO:
1023 if (elen >= 1)
1024 elems->erp_info = pos;
1025 else
1026 elem_parse_failed = true;
1027 break;
1028 case WLAN_EID_EXT_SUPP_RATES:
1029 elems->ext_supp_rates = pos;
1030 elems->ext_supp_rates_len = elen;
1031 break;
1032 case WLAN_EID_HT_CAPABILITY:
1033 if (elen >= sizeof(struct ieee80211_ht_cap))
1034 elems->ht_cap_elem = (void *)pos;
1035 else
1036 elem_parse_failed = true;
1037 break;
1038 case WLAN_EID_HT_OPERATION:
1039 if (elen >= sizeof(struct ieee80211_ht_operation))
1040 elems->ht_operation = (void *)pos;
1041 else
1042 elem_parse_failed = true;
1043 break;
1044 case WLAN_EID_VHT_CAPABILITY:
1045 if (elen >= sizeof(struct ieee80211_vht_cap))
1046 elems->vht_cap_elem = (void *)pos;
1047 else
1048 elem_parse_failed = true;
1049 break;
1050 case WLAN_EID_VHT_OPERATION:
1051 if (elen >= sizeof(struct ieee80211_vht_operation))
1052 elems->vht_operation = (void *)pos;
1053 else
1054 elem_parse_failed = true;
1055 break;
1056 case WLAN_EID_OPMODE_NOTIF:
1057 if (elen > 0)
1058 elems->opmode_notif = pos;
1059 else
1060 elem_parse_failed = true;
1061 break;
1062 case WLAN_EID_MESH_ID:
1063 elems->mesh_id = pos;
1064 elems->mesh_id_len = elen;
1065 break;
1066 case WLAN_EID_MESH_CONFIG:
1067 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1068 elems->mesh_config = (void *)pos;
1069 else
1070 elem_parse_failed = true;
1071 break;
1072 case WLAN_EID_PEER_MGMT:
1073 elems->peering = pos;
1074 elems->peering_len = elen;
1075 break;
1076 case WLAN_EID_MESH_AWAKE_WINDOW:
1077 if (elen >= 2)
1078 elems->awake_window = (void *)pos;
1079 break;
1080 case WLAN_EID_PREQ:
1081 elems->preq = pos;
1082 elems->preq_len = elen;
1083 break;
1084 case WLAN_EID_PREP:
1085 elems->prep = pos;
1086 elems->prep_len = elen;
1087 break;
1088 case WLAN_EID_PERR:
1089 elems->perr = pos;
1090 elems->perr_len = elen;
1091 break;
1092 case WLAN_EID_RANN:
1093 if (elen >= sizeof(struct ieee80211_rann_ie))
1094 elems->rann = (void *)pos;
1095 else
1096 elem_parse_failed = true;
1097 break;
1098 case WLAN_EID_CHANNEL_SWITCH:
1099 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1100 elem_parse_failed = true;
1101 break;
1102 }
1103 elems->ch_switch_ie = (void *)pos;
1104 break;
1105 case WLAN_EID_EXT_CHANSWITCH_ANN:
1106 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1107 elem_parse_failed = true;
1108 break;
1109 }
1110 elems->ext_chansw_ie = (void *)pos;
1111 break;
1112 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1113 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1114 elem_parse_failed = true;
1115 break;
1116 }
1117 elems->sec_chan_offs = (void *)pos;
1118 break;
1119 case WLAN_EID_CHAN_SWITCH_PARAM:
1120 if (elen !=
1121 sizeof(*elems->mesh_chansw_params_ie)) {
1122 elem_parse_failed = true;
1123 break;
1124 }
1125 elems->mesh_chansw_params_ie = (void *)pos;
1126 break;
1127 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1128 if (!action ||
1129 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1130 elem_parse_failed = true;
1131 break;
1132 }
1133 elems->wide_bw_chansw_ie = (void *)pos;
1134 break;
1135 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1136 if (action) {
1137 elem_parse_failed = true;
1138 break;
1139 }
1140 /*
1141 * This is a bit tricky, but as we only care about
1142 * the wide bandwidth channel switch element, so
1143 * just parse it out manually.
1144 */
1145 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1146 pos, elen);
1147 if (ie) {
1148 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1149 elems->wide_bw_chansw_ie =
1150 (void *)(ie + 2);
1151 else
1152 elem_parse_failed = true;
1153 }
1154 break;
1155 case WLAN_EID_COUNTRY:
1156 elems->country_elem = pos;
1157 elems->country_elem_len = elen;
1158 break;
1159 case WLAN_EID_PWR_CONSTRAINT:
1160 if (elen != 1) {
1161 elem_parse_failed = true;
1162 break;
1163 }
1164 elems->pwr_constr_elem = pos;
1165 break;
1166 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1167 /* Lots of different options exist, but we only care
1168 * about the Dynamic Transmit Power Control element.
1169 * First check for the Cisco OUI, then for the DTPC
1170 * tag (0x00).
1171 */
1172 if (elen < 4) {
1173 elem_parse_failed = true;
1174 break;
1175 }
1176
1177 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1178 pos[2] != 0x96 || pos[3] != 0x00)
1179 break;
1180
1181 if (elen != 6) {
1182 elem_parse_failed = true;
1183 break;
1184 }
1185
1186 if (calc_crc)
1187 crc = crc32_be(crc, pos - 2, elen + 2);
1188
1189 elems->cisco_dtpc_elem = pos;
1190 break;
1191 case WLAN_EID_TIMEOUT_INTERVAL:
1192 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1193 elems->timeout_int = (void *)pos;
1194 else
1195 elem_parse_failed = true;
1196 break;
1197 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1198 if (elen >= sizeof(*elems->max_idle_period_ie))
1199 elems->max_idle_period_ie = (void *)pos;
1200 break;
1201 case WLAN_EID_EXTENSION:
1202 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1203 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1204 elems->mu_edca_param_set = (void *)&pos[1];
1205 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1206 elems->he_cap = (void *)&pos[1];
1207 elems->he_cap_len = elen - 1;
1208 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1209 elen >= sizeof(*elems->he_operation) &&
1210 elen >= ieee80211_he_oper_size(&pos[1])) {
1211 elems->he_operation = (void *)&pos[1];
1212 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1213 elems->uora_element = (void *)&pos[1];
1214 }
1215 break;
1216 default:
1217 break;
1218 }
1219
1220 if (elem_parse_failed)
1221 elems->parse_error = true;
1222 else
1223 __set_bit(id, seen_elems);
1224
1225 left -= elen;
1226 pos += elen;
1227 }
1228
1229 if (left != 0)
1230 elems->parse_error = true;
1231
1232 return crc;
1233 }
1234
1235 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1236 struct ieee80211_tx_queue_params
1237 *qparam, int ac)
1238 {
1239 struct ieee80211_chanctx_conf *chanctx_conf;
1240 const struct ieee80211_reg_rule *rrule;
1241 const struct ieee80211_wmm_ac *wmm_ac;
1242 u16 center_freq = 0;
1243
1244 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1245 sdata->vif.type != NL80211_IFTYPE_STATION)
1246 return;
1247
1248 rcu_read_lock();
1249 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1250 if (chanctx_conf)
1251 center_freq = chanctx_conf->def.chan->center_freq;
1252
1253 if (!center_freq) {
1254 rcu_read_unlock();
1255 return;
1256 }
1257
1258 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1259
1260 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1261 rcu_read_unlock();
1262 return;
1263 }
1264
1265 if (sdata->vif.type == NL80211_IFTYPE_AP)
1266 wmm_ac = &rrule->wmm_rule.ap[ac];
1267 else
1268 wmm_ac = &rrule->wmm_rule.client[ac];
1269 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1270 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1271 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1272 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1273 rcu_read_unlock();
1274 }
1275
1276 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1277 bool bss_notify, bool enable_qos)
1278 {
1279 struct ieee80211_local *local = sdata->local;
1280 struct ieee80211_tx_queue_params qparam;
1281 struct ieee80211_chanctx_conf *chanctx_conf;
1282 int ac;
1283 bool use_11b;
1284 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1285 int aCWmin, aCWmax;
1286
1287 if (!local->ops->conf_tx)
1288 return;
1289
1290 if (local->hw.queues < IEEE80211_NUM_ACS)
1291 return;
1292
1293 memset(&qparam, 0, sizeof(qparam));
1294
1295 rcu_read_lock();
1296 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1297 use_11b = (chanctx_conf &&
1298 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1299 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1300 rcu_read_unlock();
1301
1302 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1303
1304 /* Set defaults according to 802.11-2007 Table 7-37 */
1305 aCWmax = 1023;
1306 if (use_11b)
1307 aCWmin = 31;
1308 else
1309 aCWmin = 15;
1310
1311 /* Confiure old 802.11b/g medium access rules. */
1312 qparam.cw_max = aCWmax;
1313 qparam.cw_min = aCWmin;
1314 qparam.txop = 0;
1315 qparam.aifs = 2;
1316
1317 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1318 /* Update if QoS is enabled. */
1319 if (enable_qos) {
1320 switch (ac) {
1321 case IEEE80211_AC_BK:
1322 qparam.cw_max = aCWmax;
1323 qparam.cw_min = aCWmin;
1324 qparam.txop = 0;
1325 if (is_ocb)
1326 qparam.aifs = 9;
1327 else
1328 qparam.aifs = 7;
1329 break;
1330 /* never happens but let's not leave undefined */
1331 default:
1332 case IEEE80211_AC_BE:
1333 qparam.cw_max = aCWmax;
1334 qparam.cw_min = aCWmin;
1335 qparam.txop = 0;
1336 if (is_ocb)
1337 qparam.aifs = 6;
1338 else
1339 qparam.aifs = 3;
1340 break;
1341 case IEEE80211_AC_VI:
1342 qparam.cw_max = aCWmin;
1343 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1344 if (is_ocb)
1345 qparam.txop = 0;
1346 else if (use_11b)
1347 qparam.txop = 6016/32;
1348 else
1349 qparam.txop = 3008/32;
1350
1351 if (is_ocb)
1352 qparam.aifs = 3;
1353 else
1354 qparam.aifs = 2;
1355 break;
1356 case IEEE80211_AC_VO:
1357 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1358 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1359 if (is_ocb)
1360 qparam.txop = 0;
1361 else if (use_11b)
1362 qparam.txop = 3264/32;
1363 else
1364 qparam.txop = 1504/32;
1365 qparam.aifs = 2;
1366 break;
1367 }
1368 }
1369 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1370
1371 qparam.uapsd = false;
1372
1373 sdata->tx_conf[ac] = qparam;
1374 drv_conf_tx(local, sdata, ac, &qparam);
1375 }
1376
1377 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1378 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1379 sdata->vif.type != NL80211_IFTYPE_NAN) {
1380 sdata->vif.bss_conf.qos = enable_qos;
1381 if (bss_notify)
1382 ieee80211_bss_info_change_notify(sdata,
1383 BSS_CHANGED_QOS);
1384 }
1385 }
1386
1387 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1388 u16 transaction, u16 auth_alg, u16 status,
1389 const u8 *extra, size_t extra_len, const u8 *da,
1390 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1391 u32 tx_flags)
1392 {
1393 struct ieee80211_local *local = sdata->local;
1394 struct sk_buff *skb;
1395 struct ieee80211_mgmt *mgmt;
1396 int err;
1397
1398 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1399 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1400 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1401 if (!skb)
1402 return;
1403
1404 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1405
1406 mgmt = skb_put_zero(skb, 24 + 6);
1407 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1408 IEEE80211_STYPE_AUTH);
1409 memcpy(mgmt->da, da, ETH_ALEN);
1410 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1411 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1412 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1413 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1414 mgmt->u.auth.status_code = cpu_to_le16(status);
1415 if (extra)
1416 skb_put_data(skb, extra, extra_len);
1417
1418 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1419 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1420 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1421 WARN_ON(err);
1422 }
1423
1424 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1425 tx_flags;
1426 ieee80211_tx_skb(sdata, skb);
1427 }
1428
1429 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1430 const u8 *bssid, u16 stype, u16 reason,
1431 bool send_frame, u8 *frame_buf)
1432 {
1433 struct ieee80211_local *local = sdata->local;
1434 struct sk_buff *skb;
1435 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1436
1437 /* build frame */
1438 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1439 mgmt->duration = 0; /* initialize only */
1440 mgmt->seq_ctrl = 0; /* initialize only */
1441 memcpy(mgmt->da, bssid, ETH_ALEN);
1442 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1443 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1444 /* u.deauth.reason_code == u.disassoc.reason_code */
1445 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1446
1447 if (send_frame) {
1448 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1449 IEEE80211_DEAUTH_FRAME_LEN);
1450 if (!skb)
1451 return;
1452
1453 skb_reserve(skb, local->hw.extra_tx_headroom);
1454
1455 /* copy in frame */
1456 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1457
1458 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1459 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1460 IEEE80211_SKB_CB(skb)->flags |=
1461 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1462
1463 ieee80211_tx_skb(sdata, skb);
1464 }
1465 }
1466
1467 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1468 u8 *buffer, size_t buffer_len,
1469 const u8 *ie, size_t ie_len,
1470 enum nl80211_band band,
1471 u32 rate_mask,
1472 struct cfg80211_chan_def *chandef,
1473 size_t *offset, u32 flags)
1474 {
1475 struct ieee80211_supported_band *sband;
1476 const struct ieee80211_sta_he_cap *he_cap;
1477 u8 *pos = buffer, *end = buffer + buffer_len;
1478 size_t noffset;
1479 int supp_rates_len, i;
1480 u8 rates[32];
1481 int num_rates;
1482 int ext_rates_len;
1483 int shift;
1484 u32 rate_flags;
1485 bool have_80mhz = false;
1486
1487 *offset = 0;
1488
1489 sband = local->hw.wiphy->bands[band];
1490 if (WARN_ON_ONCE(!sband))
1491 return 0;
1492
1493 rate_flags = ieee80211_chandef_rate_flags(chandef);
1494 shift = ieee80211_chandef_get_shift(chandef);
1495
1496 num_rates = 0;
1497 for (i = 0; i < sband->n_bitrates; i++) {
1498 if ((BIT(i) & rate_mask) == 0)
1499 continue; /* skip rate */
1500 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1501 continue;
1502
1503 rates[num_rates++] =
1504 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1505 (1 << shift) * 5);
1506 }
1507
1508 supp_rates_len = min_t(int, num_rates, 8);
1509
1510 if (end - pos < 2 + supp_rates_len)
1511 goto out_err;
1512 *pos++ = WLAN_EID_SUPP_RATES;
1513 *pos++ = supp_rates_len;
1514 memcpy(pos, rates, supp_rates_len);
1515 pos += supp_rates_len;
1516
1517 /* insert "request information" if in custom IEs */
1518 if (ie && ie_len) {
1519 static const u8 before_extrates[] = {
1520 WLAN_EID_SSID,
1521 WLAN_EID_SUPP_RATES,
1522 WLAN_EID_REQUEST,
1523 };
1524 noffset = ieee80211_ie_split(ie, ie_len,
1525 before_extrates,
1526 ARRAY_SIZE(before_extrates),
1527 *offset);
1528 if (end - pos < noffset - *offset)
1529 goto out_err;
1530 memcpy(pos, ie + *offset, noffset - *offset);
1531 pos += noffset - *offset;
1532 *offset = noffset;
1533 }
1534
1535 ext_rates_len = num_rates - supp_rates_len;
1536 if (ext_rates_len > 0) {
1537 if (end - pos < 2 + ext_rates_len)
1538 goto out_err;
1539 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1540 *pos++ = ext_rates_len;
1541 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1542 pos += ext_rates_len;
1543 }
1544
1545 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1546 if (end - pos < 3)
1547 goto out_err;
1548 *pos++ = WLAN_EID_DS_PARAMS;
1549 *pos++ = 1;
1550 *pos++ = ieee80211_frequency_to_channel(
1551 chandef->chan->center_freq);
1552 }
1553
1554 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1555 goto done;
1556
1557 /* insert custom IEs that go before HT */
1558 if (ie && ie_len) {
1559 static const u8 before_ht[] = {
1560 /*
1561 * no need to list the ones split off already
1562 * (or generated here)
1563 */
1564 WLAN_EID_DS_PARAMS,
1565 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1566 };
1567 noffset = ieee80211_ie_split(ie, ie_len,
1568 before_ht, ARRAY_SIZE(before_ht),
1569 *offset);
1570 if (end - pos < noffset - *offset)
1571 goto out_err;
1572 memcpy(pos, ie + *offset, noffset - *offset);
1573 pos += noffset - *offset;
1574 *offset = noffset;
1575 }
1576
1577 if (sband->ht_cap.ht_supported) {
1578 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1579 goto out_err;
1580 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1581 sband->ht_cap.cap);
1582 }
1583
1584 /* insert custom IEs that go before VHT */
1585 if (ie && ie_len) {
1586 static const u8 before_vht[] = {
1587 /*
1588 * no need to list the ones split off already
1589 * (or generated here)
1590 */
1591 WLAN_EID_BSS_COEX_2040,
1592 WLAN_EID_EXT_CAPABILITY,
1593 WLAN_EID_SSID_LIST,
1594 WLAN_EID_CHANNEL_USAGE,
1595 WLAN_EID_INTERWORKING,
1596 WLAN_EID_MESH_ID,
1597 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1598 };
1599 noffset = ieee80211_ie_split(ie, ie_len,
1600 before_vht, ARRAY_SIZE(before_vht),
1601 *offset);
1602 if (end - pos < noffset - *offset)
1603 goto out_err;
1604 memcpy(pos, ie + *offset, noffset - *offset);
1605 pos += noffset - *offset;
1606 *offset = noffset;
1607 }
1608
1609 /* Check if any channel in this sband supports at least 80 MHz */
1610 for (i = 0; i < sband->n_channels; i++) {
1611 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1612 IEEE80211_CHAN_NO_80MHZ))
1613 continue;
1614
1615 have_80mhz = true;
1616 break;
1617 }
1618
1619 if (sband->vht_cap.vht_supported && have_80mhz) {
1620 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1621 goto out_err;
1622 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1623 sband->vht_cap.cap);
1624 }
1625
1626 /* insert custom IEs that go before HE */
1627 if (ie && ie_len) {
1628 static const u8 before_he[] = {
1629 /*
1630 * no need to list the ones split off before VHT
1631 * or generated here
1632 */
1633 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1634 WLAN_EID_AP_CSN,
1635 /* TODO: add 11ah/11aj/11ak elements */
1636 };
1637 noffset = ieee80211_ie_split(ie, ie_len,
1638 before_he, ARRAY_SIZE(before_he),
1639 *offset);
1640 if (end - pos < noffset - *offset)
1641 goto out_err;
1642 memcpy(pos, ie + *offset, noffset - *offset);
1643 pos += noffset - *offset;
1644 *offset = noffset;
1645 }
1646
1647 he_cap = ieee80211_get_he_sta_cap(sband);
1648 if (he_cap) {
1649 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1650 if (!pos)
1651 goto out_err;
1652 }
1653
1654 /*
1655 * If adding more here, adjust code in main.c
1656 * that calculates local->scan_ies_len.
1657 */
1658
1659 return pos - buffer;
1660 out_err:
1661 WARN_ONCE(1, "not enough space for preq IEs\n");
1662 done:
1663 return pos - buffer;
1664 }
1665
1666 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1667 size_t buffer_len,
1668 struct ieee80211_scan_ies *ie_desc,
1669 const u8 *ie, size_t ie_len,
1670 u8 bands_used, u32 *rate_masks,
1671 struct cfg80211_chan_def *chandef,
1672 u32 flags)
1673 {
1674 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1675 int i;
1676
1677 memset(ie_desc, 0, sizeof(*ie_desc));
1678
1679 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1680 if (bands_used & BIT(i)) {
1681 pos += ieee80211_build_preq_ies_band(local,
1682 buffer + pos,
1683 buffer_len - pos,
1684 ie, ie_len, i,
1685 rate_masks[i],
1686 chandef,
1687 &custom_ie_offset,
1688 flags);
1689 ie_desc->ies[i] = buffer + old_pos;
1690 ie_desc->len[i] = pos - old_pos;
1691 old_pos = pos;
1692 }
1693 }
1694
1695 /* add any remaining custom IEs */
1696 if (ie && ie_len) {
1697 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1698 "not enough space for preq custom IEs\n"))
1699 return pos;
1700 memcpy(buffer + pos, ie + custom_ie_offset,
1701 ie_len - custom_ie_offset);
1702 ie_desc->common_ies = buffer + pos;
1703 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1704 pos += ie_len - custom_ie_offset;
1705 }
1706
1707 return pos;
1708 };
1709
1710 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1711 const u8 *src, const u8 *dst,
1712 u32 ratemask,
1713 struct ieee80211_channel *chan,
1714 const u8 *ssid, size_t ssid_len,
1715 const u8 *ie, size_t ie_len,
1716 u32 flags)
1717 {
1718 struct ieee80211_local *local = sdata->local;
1719 struct cfg80211_chan_def chandef;
1720 struct sk_buff *skb;
1721 struct ieee80211_mgmt *mgmt;
1722 int ies_len;
1723 u32 rate_masks[NUM_NL80211_BANDS] = {};
1724 struct ieee80211_scan_ies dummy_ie_desc;
1725
1726 /*
1727 * Do not send DS Channel parameter for directed probe requests
1728 * in order to maximize the chance that we get a response. Some
1729 * badly-behaved APs don't respond when this parameter is included.
1730 */
1731 chandef.width = sdata->vif.bss_conf.chandef.width;
1732 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1733 chandef.chan = NULL;
1734 else
1735 chandef.chan = chan;
1736
1737 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1738 100 + ie_len);
1739 if (!skb)
1740 return NULL;
1741
1742 rate_masks[chan->band] = ratemask;
1743 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1744 skb_tailroom(skb), &dummy_ie_desc,
1745 ie, ie_len, BIT(chan->band),
1746 rate_masks, &chandef, flags);
1747 skb_put(skb, ies_len);
1748
1749 if (dst) {
1750 mgmt = (struct ieee80211_mgmt *) skb->data;
1751 memcpy(mgmt->da, dst, ETH_ALEN);
1752 memcpy(mgmt->bssid, dst, ETH_ALEN);
1753 }
1754
1755 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1756
1757 return skb;
1758 }
1759
1760 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1761 struct ieee802_11_elems *elems,
1762 enum nl80211_band band, u32 *basic_rates)
1763 {
1764 struct ieee80211_supported_band *sband;
1765 size_t num_rates;
1766 u32 supp_rates, rate_flags;
1767 int i, j, shift;
1768
1769 sband = sdata->local->hw.wiphy->bands[band];
1770 if (WARN_ON(!sband))
1771 return 1;
1772
1773 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1774 shift = ieee80211_vif_get_shift(&sdata->vif);
1775
1776 num_rates = sband->n_bitrates;
1777 supp_rates = 0;
1778 for (i = 0; i < elems->supp_rates_len +
1779 elems->ext_supp_rates_len; i++) {
1780 u8 rate = 0;
1781 int own_rate;
1782 bool is_basic;
1783 if (i < elems->supp_rates_len)
1784 rate = elems->supp_rates[i];
1785 else if (elems->ext_supp_rates)
1786 rate = elems->ext_supp_rates
1787 [i - elems->supp_rates_len];
1788 own_rate = 5 * (rate & 0x7f);
1789 is_basic = !!(rate & 0x80);
1790
1791 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1792 continue;
1793
1794 for (j = 0; j < num_rates; j++) {
1795 int brate;
1796 if ((rate_flags & sband->bitrates[j].flags)
1797 != rate_flags)
1798 continue;
1799
1800 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1801 1 << shift);
1802
1803 if (brate == own_rate) {
1804 supp_rates |= BIT(j);
1805 if (basic_rates && is_basic)
1806 *basic_rates |= BIT(j);
1807 }
1808 }
1809 }
1810 return supp_rates;
1811 }
1812
1813 void ieee80211_stop_device(struct ieee80211_local *local)
1814 {
1815 ieee80211_led_radio(local, false);
1816 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1817
1818 cancel_work_sync(&local->reconfig_filter);
1819
1820 flush_workqueue(local->workqueue);
1821 drv_stop(local);
1822 }
1823
1824 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1825 bool aborted)
1826 {
1827 /* It's possible that we don't handle the scan completion in
1828 * time during suspend, so if it's still marked as completed
1829 * here, queue the work and flush it to clean things up.
1830 * Instead of calling the worker function directly here, we
1831 * really queue it to avoid potential races with other flows
1832 * scheduling the same work.
1833 */
1834 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1835 /* If coming from reconfiguration failure, abort the scan so
1836 * we don't attempt to continue a partial HW scan - which is
1837 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1838 * completed scan, and a 5 GHz portion is still pending.
1839 */
1840 if (aborted)
1841 set_bit(SCAN_ABORTED, &local->scanning);
1842 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1843 flush_delayed_work(&local->scan_work);
1844 }
1845 }
1846
1847 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1848 {
1849 struct ieee80211_sub_if_data *sdata;
1850 struct ieee80211_chanctx *ctx;
1851
1852 /*
1853 * We get here if during resume the device can't be restarted properly.
1854 * We might also get here if this happens during HW reset, which is a
1855 * slightly different situation and we need to drop all connections in
1856 * the latter case.
1857 *
1858 * Ask cfg80211 to turn off all interfaces, this will result in more
1859 * warnings but at least we'll then get into a clean stopped state.
1860 */
1861
1862 local->resuming = false;
1863 local->suspended = false;
1864 local->in_reconfig = false;
1865
1866 ieee80211_flush_completed_scan(local, true);
1867
1868 /* scheduled scan clearly can't be running any more, but tell
1869 * cfg80211 and clear local state
1870 */
1871 ieee80211_sched_scan_end(local);
1872
1873 list_for_each_entry(sdata, &local->interfaces, list)
1874 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1875
1876 /* Mark channel contexts as not being in the driver any more to avoid
1877 * removing them from the driver during the shutdown process...
1878 */
1879 mutex_lock(&local->chanctx_mtx);
1880 list_for_each_entry(ctx, &local->chanctx_list, list)
1881 ctx->driver_present = false;
1882 mutex_unlock(&local->chanctx_mtx);
1883
1884 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1885 }
1886
1887 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1888 struct ieee80211_sub_if_data *sdata)
1889 {
1890 struct ieee80211_chanctx_conf *conf;
1891 struct ieee80211_chanctx *ctx;
1892
1893 if (!local->use_chanctx)
1894 return;
1895
1896 mutex_lock(&local->chanctx_mtx);
1897 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1898 lockdep_is_held(&local->chanctx_mtx));
1899 if (conf) {
1900 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1901 drv_assign_vif_chanctx(local, sdata, ctx);
1902 }
1903 mutex_unlock(&local->chanctx_mtx);
1904 }
1905
1906 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1907 {
1908 struct ieee80211_local *local = sdata->local;
1909 struct sta_info *sta;
1910
1911 /* add STAs back */
1912 mutex_lock(&local->sta_mtx);
1913 list_for_each_entry(sta, &local->sta_list, list) {
1914 enum ieee80211_sta_state state;
1915
1916 if (!sta->uploaded || sta->sdata != sdata)
1917 continue;
1918
1919 for (state = IEEE80211_STA_NOTEXIST;
1920 state < sta->sta_state; state++)
1921 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1922 state + 1));
1923 }
1924 mutex_unlock(&local->sta_mtx);
1925 }
1926
1927 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1928 {
1929 struct cfg80211_nan_func *func, **funcs;
1930 int res, id, i = 0;
1931
1932 res = drv_start_nan(sdata->local, sdata,
1933 &sdata->u.nan.conf);
1934 if (WARN_ON(res))
1935 return res;
1936
1937 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1938 sizeof(*funcs),
1939 GFP_KERNEL);
1940 if (!funcs)
1941 return -ENOMEM;
1942
1943 /* Add all the functions:
1944 * This is a little bit ugly. We need to call a potentially sleeping
1945 * callback for each NAN function, so we can't hold the spinlock.
1946 */
1947 spin_lock_bh(&sdata->u.nan.func_lock);
1948
1949 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1950 funcs[i++] = func;
1951
1952 spin_unlock_bh(&sdata->u.nan.func_lock);
1953
1954 for (i = 0; funcs[i]; i++) {
1955 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1956 if (WARN_ON(res))
1957 ieee80211_nan_func_terminated(&sdata->vif,
1958 funcs[i]->instance_id,
1959 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1960 GFP_KERNEL);
1961 }
1962
1963 kfree(funcs);
1964
1965 return 0;
1966 }
1967
1968 int ieee80211_reconfig(struct ieee80211_local *local)
1969 {
1970 struct ieee80211_hw *hw = &local->hw;
1971 struct ieee80211_sub_if_data *sdata;
1972 struct ieee80211_chanctx *ctx;
1973 struct sta_info *sta;
1974 int res, i;
1975 bool reconfig_due_to_wowlan = false;
1976 struct ieee80211_sub_if_data *sched_scan_sdata;
1977 struct cfg80211_sched_scan_request *sched_scan_req;
1978 bool sched_scan_stopped = false;
1979 bool suspended = local->suspended;
1980
1981 /* nothing to do if HW shouldn't run */
1982 if (!local->open_count)
1983 goto wake_up;
1984
1985 #ifdef CONFIG_PM
1986 if (suspended)
1987 local->resuming = true;
1988
1989 if (local->wowlan) {
1990 /*
1991 * In the wowlan case, both mac80211 and the device
1992 * are functional when the resume op is called, so
1993 * clear local->suspended so the device could operate
1994 * normally (e.g. pass rx frames).
1995 */
1996 local->suspended = false;
1997 res = drv_resume(local);
1998 local->wowlan = false;
1999 if (res < 0) {
2000 local->resuming = false;
2001 return res;
2002 }
2003 if (res == 0)
2004 goto wake_up;
2005 WARN_ON(res > 1);
2006 /*
2007 * res is 1, which means the driver requested
2008 * to go through a regular reset on wakeup.
2009 * restore local->suspended in this case.
2010 */
2011 reconfig_due_to_wowlan = true;
2012 local->suspended = true;
2013 }
2014 #endif
2015
2016 /*
2017 * In case of hw_restart during suspend (without wowlan),
2018 * cancel restart work, as we are reconfiguring the device
2019 * anyway.
2020 * Note that restart_work is scheduled on a frozen workqueue,
2021 * so we can't deadlock in this case.
2022 */
2023 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2024 cancel_work_sync(&local->restart_work);
2025
2026 local->started = false;
2027
2028 /*
2029 * Upon resume hardware can sometimes be goofy due to
2030 * various platform / driver / bus issues, so restarting
2031 * the device may at times not work immediately. Propagate
2032 * the error.
2033 */
2034 res = drv_start(local);
2035 if (res) {
2036 if (suspended)
2037 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2038 else
2039 WARN(1, "Hardware became unavailable during restart.\n");
2040 ieee80211_handle_reconfig_failure(local);
2041 return res;
2042 }
2043
2044 /* setup fragmentation threshold */
2045 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2046
2047 /* setup RTS threshold */
2048 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2049
2050 /* reset coverage class */
2051 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2052
2053 ieee80211_led_radio(local, true);
2054 ieee80211_mod_tpt_led_trig(local,
2055 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2056
2057 /* add interfaces */
2058 sdata = rtnl_dereference(local->monitor_sdata);
2059 if (sdata) {
2060 /* in HW restart it exists already */
2061 WARN_ON(local->resuming);
2062 res = drv_add_interface(local, sdata);
2063 if (WARN_ON(res)) {
2064 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2065 synchronize_net();
2066 kfree(sdata);
2067 }
2068 }
2069
2070 list_for_each_entry(sdata, &local->interfaces, list) {
2071 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2072 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2073 ieee80211_sdata_running(sdata)) {
2074 res = drv_add_interface(local, sdata);
2075 if (WARN_ON(res))
2076 break;
2077 }
2078 }
2079
2080 /* If adding any of the interfaces failed above, roll back and
2081 * report failure.
2082 */
2083 if (res) {
2084 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2085 list)
2086 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2087 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2088 ieee80211_sdata_running(sdata))
2089 drv_remove_interface(local, sdata);
2090 ieee80211_handle_reconfig_failure(local);
2091 return res;
2092 }
2093
2094 /* add channel contexts */
2095 if (local->use_chanctx) {
2096 mutex_lock(&local->chanctx_mtx);
2097 list_for_each_entry(ctx, &local->chanctx_list, list)
2098 if (ctx->replace_state !=
2099 IEEE80211_CHANCTX_REPLACES_OTHER)
2100 WARN_ON(drv_add_chanctx(local, ctx));
2101 mutex_unlock(&local->chanctx_mtx);
2102
2103 sdata = rtnl_dereference(local->monitor_sdata);
2104 if (sdata && ieee80211_sdata_running(sdata))
2105 ieee80211_assign_chanctx(local, sdata);
2106 }
2107
2108 /* reconfigure hardware */
2109 ieee80211_hw_config(local, ~0);
2110
2111 ieee80211_configure_filter(local);
2112
2113 /* Finally also reconfigure all the BSS information */
2114 list_for_each_entry(sdata, &local->interfaces, list) {
2115 u32 changed;
2116
2117 if (!ieee80211_sdata_running(sdata))
2118 continue;
2119
2120 ieee80211_assign_chanctx(local, sdata);
2121
2122 switch (sdata->vif.type) {
2123 case NL80211_IFTYPE_AP_VLAN:
2124 case NL80211_IFTYPE_MONITOR:
2125 break;
2126 default:
2127 ieee80211_reconfig_stations(sdata);
2128 /* fall through */
2129 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2130 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2131 drv_conf_tx(local, sdata, i,
2132 &sdata->tx_conf[i]);
2133 break;
2134 }
2135
2136 /* common change flags for all interface types */
2137 changed = BSS_CHANGED_ERP_CTS_PROT |
2138 BSS_CHANGED_ERP_PREAMBLE |
2139 BSS_CHANGED_ERP_SLOT |
2140 BSS_CHANGED_HT |
2141 BSS_CHANGED_BASIC_RATES |
2142 BSS_CHANGED_BEACON_INT |
2143 BSS_CHANGED_BSSID |
2144 BSS_CHANGED_CQM |
2145 BSS_CHANGED_QOS |
2146 BSS_CHANGED_IDLE |
2147 BSS_CHANGED_TXPOWER |
2148 BSS_CHANGED_MCAST_RATE;
2149
2150 if (sdata->vif.mu_mimo_owner)
2151 changed |= BSS_CHANGED_MU_GROUPS;
2152
2153 switch (sdata->vif.type) {
2154 case NL80211_IFTYPE_STATION:
2155 changed |= BSS_CHANGED_ASSOC |
2156 BSS_CHANGED_ARP_FILTER |
2157 BSS_CHANGED_PS;
2158
2159 /* Re-send beacon info report to the driver */
2160 if (sdata->u.mgd.have_beacon)
2161 changed |= BSS_CHANGED_BEACON_INFO;
2162
2163 if (sdata->vif.bss_conf.max_idle_period ||
2164 sdata->vif.bss_conf.protected_keep_alive)
2165 changed |= BSS_CHANGED_KEEP_ALIVE;
2166
2167 sdata_lock(sdata);
2168 ieee80211_bss_info_change_notify(sdata, changed);
2169 sdata_unlock(sdata);
2170 break;
2171 case NL80211_IFTYPE_OCB:
2172 changed |= BSS_CHANGED_OCB;
2173 ieee80211_bss_info_change_notify(sdata, changed);
2174 break;
2175 case NL80211_IFTYPE_ADHOC:
2176 changed |= BSS_CHANGED_IBSS;
2177 /* fall through */
2178 case NL80211_IFTYPE_AP:
2179 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2180
2181 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2182 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2183 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2184 changed |= BSS_CHANGED_FTM_RESPONDER;
2185
2186 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2187 changed |= BSS_CHANGED_AP_PROBE_RESP;
2188
2189 if (rcu_access_pointer(sdata->u.ap.beacon))
2190 drv_start_ap(local, sdata);
2191 }
2192
2193 /* fall through */
2194 case NL80211_IFTYPE_MESH_POINT:
2195 if (sdata->vif.bss_conf.enable_beacon) {
2196 changed |= BSS_CHANGED_BEACON |
2197 BSS_CHANGED_BEACON_ENABLED;
2198 ieee80211_bss_info_change_notify(sdata, changed);
2199 }
2200 break;
2201 case NL80211_IFTYPE_NAN:
2202 res = ieee80211_reconfig_nan(sdata);
2203 if (res < 0) {
2204 ieee80211_handle_reconfig_failure(local);
2205 return res;
2206 }
2207 break;
2208 case NL80211_IFTYPE_WDS:
2209 case NL80211_IFTYPE_AP_VLAN:
2210 case NL80211_IFTYPE_MONITOR:
2211 case NL80211_IFTYPE_P2P_DEVICE:
2212 /* nothing to do */
2213 break;
2214 case NL80211_IFTYPE_UNSPECIFIED:
2215 case NUM_NL80211_IFTYPES:
2216 case NL80211_IFTYPE_P2P_CLIENT:
2217 case NL80211_IFTYPE_P2P_GO:
2218 WARN_ON(1);
2219 break;
2220 }
2221 }
2222
2223 ieee80211_recalc_ps(local);
2224
2225 /*
2226 * The sta might be in psm against the ap (e.g. because
2227 * this was the state before a hw restart), so we
2228 * explicitly send a null packet in order to make sure
2229 * it'll sync against the ap (and get out of psm).
2230 */
2231 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2232 list_for_each_entry(sdata, &local->interfaces, list) {
2233 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2234 continue;
2235 if (!sdata->u.mgd.associated)
2236 continue;
2237
2238 ieee80211_send_nullfunc(local, sdata, false);
2239 }
2240 }
2241
2242 /* APs are now beaconing, add back stations */
2243 mutex_lock(&local->sta_mtx);
2244 list_for_each_entry(sta, &local->sta_list, list) {
2245 enum ieee80211_sta_state state;
2246
2247 if (!sta->uploaded)
2248 continue;
2249
2250 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2251 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2252 continue;
2253
2254 for (state = IEEE80211_STA_NOTEXIST;
2255 state < sta->sta_state; state++)
2256 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2257 state + 1));
2258 }
2259 mutex_unlock(&local->sta_mtx);
2260
2261 /* add back keys */
2262 list_for_each_entry(sdata, &local->interfaces, list)
2263 ieee80211_reset_crypto_tx_tailroom(sdata);
2264
2265 list_for_each_entry(sdata, &local->interfaces, list)
2266 if (ieee80211_sdata_running(sdata))
2267 ieee80211_enable_keys(sdata);
2268
2269 /* Reconfigure sched scan if it was interrupted by FW restart */
2270 mutex_lock(&local->mtx);
2271 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2272 lockdep_is_held(&local->mtx));
2273 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2274 lockdep_is_held(&local->mtx));
2275 if (sched_scan_sdata && sched_scan_req)
2276 /*
2277 * Sched scan stopped, but we don't want to report it. Instead,
2278 * we're trying to reschedule. However, if more than one scan
2279 * plan was set, we cannot reschedule since we don't know which
2280 * scan plan was currently running (and some scan plans may have
2281 * already finished).
2282 */
2283 if (sched_scan_req->n_scan_plans > 1 ||
2284 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2285 sched_scan_req)) {
2286 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2287 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2288 sched_scan_stopped = true;
2289 }
2290 mutex_unlock(&local->mtx);
2291
2292 if (sched_scan_stopped)
2293 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2294
2295 wake_up:
2296
2297 if (local->monitors == local->open_count && local->monitors > 0)
2298 ieee80211_add_virtual_monitor(local);
2299
2300 /*
2301 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2302 * sessions can be established after a resume.
2303 *
2304 * Also tear down aggregation sessions since reconfiguring
2305 * them in a hardware restart scenario is not easily done
2306 * right now, and the hardware will have lost information
2307 * about the sessions, but we and the AP still think they
2308 * are active. This is really a workaround though.
2309 */
2310 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2311 mutex_lock(&local->sta_mtx);
2312
2313 list_for_each_entry(sta, &local->sta_list, list) {
2314 if (!local->resuming)
2315 ieee80211_sta_tear_down_BA_sessions(
2316 sta, AGG_STOP_LOCAL_REQUEST);
2317 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2318 }
2319
2320 mutex_unlock(&local->sta_mtx);
2321 }
2322
2323 if (local->in_reconfig) {
2324 local->in_reconfig = false;
2325 barrier();
2326
2327 /* Restart deferred ROCs */
2328 mutex_lock(&local->mtx);
2329 ieee80211_start_next_roc(local);
2330 mutex_unlock(&local->mtx);
2331 }
2332
2333 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2334 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2335 false);
2336
2337 /*
2338 * If this is for hw restart things are still running.
2339 * We may want to change that later, however.
2340 */
2341 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2342 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2343
2344 if (!suspended)
2345 return 0;
2346
2347 #ifdef CONFIG_PM
2348 /* first set suspended false, then resuming */
2349 local->suspended = false;
2350 mb();
2351 local->resuming = false;
2352
2353 ieee80211_flush_completed_scan(local, false);
2354
2355 if (local->open_count && !reconfig_due_to_wowlan)
2356 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2357
2358 list_for_each_entry(sdata, &local->interfaces, list) {
2359 if (!ieee80211_sdata_running(sdata))
2360 continue;
2361 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2362 ieee80211_sta_restart(sdata);
2363 }
2364
2365 mod_timer(&local->sta_cleanup, jiffies + 1);
2366 #else
2367 WARN_ON(1);
2368 #endif
2369
2370 return 0;
2371 }
2372
2373 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2374 {
2375 struct ieee80211_sub_if_data *sdata;
2376 struct ieee80211_local *local;
2377 struct ieee80211_key *key;
2378
2379 if (WARN_ON(!vif))
2380 return;
2381
2382 sdata = vif_to_sdata(vif);
2383 local = sdata->local;
2384
2385 if (WARN_ON(!local->resuming))
2386 return;
2387
2388 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2389 return;
2390
2391 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2392
2393 mutex_lock(&local->key_mtx);
2394 list_for_each_entry(key, &sdata->key_list, list)
2395 key->flags |= KEY_FLAG_TAINTED;
2396 mutex_unlock(&local->key_mtx);
2397 }
2398 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2399
2400 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2401 {
2402 struct ieee80211_local *local = sdata->local;
2403 struct ieee80211_chanctx_conf *chanctx_conf;
2404 struct ieee80211_chanctx *chanctx;
2405
2406 mutex_lock(&local->chanctx_mtx);
2407
2408 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2409 lockdep_is_held(&local->chanctx_mtx));
2410
2411 /*
2412 * This function can be called from a work, thus it may be possible
2413 * that the chanctx_conf is removed (due to a disconnection, for
2414 * example).
2415 * So nothing should be done in such case.
2416 */
2417 if (!chanctx_conf)
2418 goto unlock;
2419
2420 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2421 ieee80211_recalc_smps_chanctx(local, chanctx);
2422 unlock:
2423 mutex_unlock(&local->chanctx_mtx);
2424 }
2425
2426 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2427 {
2428 struct ieee80211_local *local = sdata->local;
2429 struct ieee80211_chanctx_conf *chanctx_conf;
2430 struct ieee80211_chanctx *chanctx;
2431
2432 mutex_lock(&local->chanctx_mtx);
2433
2434 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2435 lockdep_is_held(&local->chanctx_mtx));
2436
2437 if (WARN_ON_ONCE(!chanctx_conf))
2438 goto unlock;
2439
2440 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2441 ieee80211_recalc_chanctx_min_def(local, chanctx);
2442 unlock:
2443 mutex_unlock(&local->chanctx_mtx);
2444 }
2445
2446 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2447 {
2448 size_t pos = offset;
2449
2450 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2451 pos += 2 + ies[pos + 1];
2452
2453 return pos;
2454 }
2455
2456 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2457 int rssi_min_thold,
2458 int rssi_max_thold)
2459 {
2460 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2461
2462 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2463 return;
2464
2465 /*
2466 * Scale up threshold values before storing it, as the RSSI averaging
2467 * algorithm uses a scaled up value as well. Change this scaling
2468 * factor if the RSSI averaging algorithm changes.
2469 */
2470 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2471 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2472 }
2473
2474 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2475 int rssi_min_thold,
2476 int rssi_max_thold)
2477 {
2478 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2479
2480 WARN_ON(rssi_min_thold == rssi_max_thold ||
2481 rssi_min_thold > rssi_max_thold);
2482
2483 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2484 rssi_max_thold);
2485 }
2486 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2487
2488 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2489 {
2490 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2491
2492 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2493 }
2494 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2495
2496 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2497 u16 cap)
2498 {
2499 __le16 tmp;
2500
2501 *pos++ = WLAN_EID_HT_CAPABILITY;
2502 *pos++ = sizeof(struct ieee80211_ht_cap);
2503 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2504
2505 /* capability flags */
2506 tmp = cpu_to_le16(cap);
2507 memcpy(pos, &tmp, sizeof(u16));
2508 pos += sizeof(u16);
2509
2510 /* AMPDU parameters */
2511 *pos++ = ht_cap->ampdu_factor |
2512 (ht_cap->ampdu_density <<
2513 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2514
2515 /* MCS set */
2516 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2517 pos += sizeof(ht_cap->mcs);
2518
2519 /* extended capabilities */
2520 pos += sizeof(__le16);
2521
2522 /* BF capabilities */
2523 pos += sizeof(__le32);
2524
2525 /* antenna selection */
2526 pos += sizeof(u8);
2527
2528 return pos;
2529 }
2530
2531 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2532 u32 cap)
2533 {
2534 __le32 tmp;
2535
2536 *pos++ = WLAN_EID_VHT_CAPABILITY;
2537 *pos++ = sizeof(struct ieee80211_vht_cap);
2538 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2539
2540 /* capability flags */
2541 tmp = cpu_to_le32(cap);
2542 memcpy(pos, &tmp, sizeof(u32));
2543 pos += sizeof(u32);
2544
2545 /* VHT MCS set */
2546 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2547 pos += sizeof(vht_cap->vht_mcs);
2548
2549 return pos;
2550 }
2551
2552 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2553 const struct ieee80211_sta_he_cap *he_cap,
2554 u8 *end)
2555 {
2556 u8 n;
2557 u8 ie_len;
2558 u8 *orig_pos = pos;
2559
2560 /* Make sure we have place for the IE */
2561 /*
2562 * TODO: the 1 added is because this temporarily is under the EXTENSION
2563 * IE. Get rid of it when it moves.
2564 */
2565 if (!he_cap)
2566 return orig_pos;
2567
2568 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2569 ie_len = 2 + 1 +
2570 sizeof(he_cap->he_cap_elem) + n +
2571 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2572 he_cap->he_cap_elem.phy_cap_info);
2573
2574 if ((end - pos) < ie_len)
2575 return orig_pos;
2576
2577 *pos++ = WLAN_EID_EXTENSION;
2578 pos++; /* We'll set the size later below */
2579 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2580
2581 /* Fixed data */
2582 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2583 pos += sizeof(he_cap->he_cap_elem);
2584
2585 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2586 pos += n;
2587
2588 /* Check if PPE Threshold should be present */
2589 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2590 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2591 goto end;
2592
2593 /*
2594 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2595 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2596 */
2597 n = hweight8(he_cap->ppe_thres[0] &
2598 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2599 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2600 IEEE80211_PPE_THRES_NSS_POS));
2601
2602 /*
2603 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2604 * total size.
2605 */
2606 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2607 n = DIV_ROUND_UP(n, 8);
2608
2609 /* Copy PPE Thresholds */
2610 memcpy(pos, &he_cap->ppe_thres, n);
2611 pos += n;
2612
2613 end:
2614 orig_pos[1] = (pos - orig_pos) - 2;
2615 return pos;
2616 }
2617
2618 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2619 const struct cfg80211_chan_def *chandef,
2620 u16 prot_mode, bool rifs_mode)
2621 {
2622 struct ieee80211_ht_operation *ht_oper;
2623 /* Build HT Information */
2624 *pos++ = WLAN_EID_HT_OPERATION;
2625 *pos++ = sizeof(struct ieee80211_ht_operation);
2626 ht_oper = (struct ieee80211_ht_operation *)pos;
2627 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2628 chandef->chan->center_freq);
2629 switch (chandef->width) {
2630 case NL80211_CHAN_WIDTH_160:
2631 case NL80211_CHAN_WIDTH_80P80:
2632 case NL80211_CHAN_WIDTH_80:
2633 case NL80211_CHAN_WIDTH_40:
2634 if (chandef->center_freq1 > chandef->chan->center_freq)
2635 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2636 else
2637 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2638 break;
2639 default:
2640 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2641 break;
2642 }
2643 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2644 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2645 chandef->width != NL80211_CHAN_WIDTH_20)
2646 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2647
2648 if (rifs_mode)
2649 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2650
2651 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2652 ht_oper->stbc_param = 0x0000;
2653
2654 /* It seems that Basic MCS set and Supported MCS set
2655 are identical for the first 10 bytes */
2656 memset(&ht_oper->basic_set, 0, 16);
2657 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2658
2659 return pos + sizeof(struct ieee80211_ht_operation);
2660 }
2661
2662 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2663 const struct cfg80211_chan_def *chandef)
2664 {
2665 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2666 *pos++ = 3; /* IE length */
2667 /* New channel width */
2668 switch (chandef->width) {
2669 case NL80211_CHAN_WIDTH_80:
2670 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2671 break;
2672 case NL80211_CHAN_WIDTH_160:
2673 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2674 break;
2675 case NL80211_CHAN_WIDTH_80P80:
2676 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2677 break;
2678 default:
2679 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2680 }
2681
2682 /* new center frequency segment 0 */
2683 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2684 /* new center frequency segment 1 */
2685 if (chandef->center_freq2)
2686 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2687 else
2688 *pos++ = 0;
2689 }
2690
2691 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2692 const struct cfg80211_chan_def *chandef)
2693 {
2694 struct ieee80211_vht_operation *vht_oper;
2695
2696 *pos++ = WLAN_EID_VHT_OPERATION;
2697 *pos++ = sizeof(struct ieee80211_vht_operation);
2698 vht_oper = (struct ieee80211_vht_operation *)pos;
2699 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2700 chandef->center_freq1);
2701 if (chandef->center_freq2)
2702 vht_oper->center_freq_seg1_idx =
2703 ieee80211_frequency_to_channel(chandef->center_freq2);
2704 else
2705 vht_oper->center_freq_seg1_idx = 0x00;
2706
2707 switch (chandef->width) {
2708 case NL80211_CHAN_WIDTH_160:
2709 /*
2710 * Convert 160 MHz channel width to new style as interop
2711 * workaround.
2712 */
2713 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2714 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2715 if (chandef->chan->center_freq < chandef->center_freq1)
2716 vht_oper->center_freq_seg0_idx -= 8;
2717 else
2718 vht_oper->center_freq_seg0_idx += 8;
2719 break;
2720 case NL80211_CHAN_WIDTH_80P80:
2721 /*
2722 * Convert 80+80 MHz channel width to new style as interop
2723 * workaround.
2724 */
2725 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2726 break;
2727 case NL80211_CHAN_WIDTH_80:
2728 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2729 break;
2730 default:
2731 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2732 break;
2733 }
2734
2735 /* don't require special VHT peer rates */
2736 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2737
2738 return pos + sizeof(struct ieee80211_vht_operation);
2739 }
2740
2741 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2742 struct cfg80211_chan_def *chandef)
2743 {
2744 enum nl80211_channel_type channel_type;
2745
2746 if (!ht_oper)
2747 return false;
2748
2749 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2750 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2751 channel_type = NL80211_CHAN_HT20;
2752 break;
2753 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2754 channel_type = NL80211_CHAN_HT40PLUS;
2755 break;
2756 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2757 channel_type = NL80211_CHAN_HT40MINUS;
2758 break;
2759 default:
2760 channel_type = NL80211_CHAN_NO_HT;
2761 return false;
2762 }
2763
2764 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2765 return true;
2766 }
2767
2768 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2769 const struct ieee80211_vht_operation *oper,
2770 const struct ieee80211_ht_operation *htop,
2771 struct cfg80211_chan_def *chandef)
2772 {
2773 struct cfg80211_chan_def new = *chandef;
2774 int cf0, cf1;
2775 int ccfs0, ccfs1, ccfs2;
2776 int ccf0, ccf1;
2777
2778 if (!oper || !htop)
2779 return false;
2780
2781 ccfs0 = oper->center_freq_seg0_idx;
2782 ccfs1 = oper->center_freq_seg1_idx;
2783 ccfs2 = (le16_to_cpu(htop->operation_mode) &
2784 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2785 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2786
2787 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2788 ccf0 = ccfs0;
2789 ccf1 = ccfs1;
2790 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2791 ccf1 = ccfs2;
2792
2793 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2794 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2795
2796 switch (oper->chan_width) {
2797 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2798 /* just use HT information directly */
2799 break;
2800 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2801 new.width = NL80211_CHAN_WIDTH_80;
2802 new.center_freq1 = cf0;
2803 /* If needed, adjust based on the newer interop workaround. */
2804 if (ccf1) {
2805 unsigned int diff;
2806
2807 diff = abs(ccf1 - ccf0);
2808 if (diff == 8) {
2809 new.width = NL80211_CHAN_WIDTH_160;
2810 new.center_freq1 = cf1;
2811 } else if (diff > 8) {
2812 new.width = NL80211_CHAN_WIDTH_80P80;
2813 new.center_freq2 = cf1;
2814 }
2815 }
2816 break;
2817 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2818 /* deprecated encoding */
2819 new.width = NL80211_CHAN_WIDTH_160;
2820 new.center_freq1 = cf0;
2821 break;
2822 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2823 /* deprecated encoding */
2824 new.width = NL80211_CHAN_WIDTH_80P80;
2825 new.center_freq1 = cf0;
2826 new.center_freq2 = cf1;
2827 break;
2828 default:
2829 return false;
2830 }
2831
2832 if (!cfg80211_chandef_valid(&new))
2833 return false;
2834
2835 *chandef = new;
2836 return true;
2837 }
2838
2839 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2840 const struct ieee80211_supported_band *sband,
2841 const u8 *srates, int srates_len, u32 *rates)
2842 {
2843 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2844 int shift = ieee80211_chandef_get_shift(chandef);
2845 struct ieee80211_rate *br;
2846 int brate, rate, i, j, count = 0;
2847
2848 *rates = 0;
2849
2850 for (i = 0; i < srates_len; i++) {
2851 rate = srates[i] & 0x7f;
2852
2853 for (j = 0; j < sband->n_bitrates; j++) {
2854 br = &sband->bitrates[j];
2855 if ((rate_flags & br->flags) != rate_flags)
2856 continue;
2857
2858 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2859 if (brate == rate) {
2860 *rates |= BIT(j);
2861 count++;
2862 break;
2863 }
2864 }
2865 }
2866 return count;
2867 }
2868
2869 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2870 struct sk_buff *skb, bool need_basic,
2871 enum nl80211_band band)
2872 {
2873 struct ieee80211_local *local = sdata->local;
2874 struct ieee80211_supported_band *sband;
2875 int rate, shift;
2876 u8 i, rates, *pos;
2877 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2878 u32 rate_flags;
2879
2880 shift = ieee80211_vif_get_shift(&sdata->vif);
2881 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2882 sband = local->hw.wiphy->bands[band];
2883 rates = 0;
2884 for (i = 0; i < sband->n_bitrates; i++) {
2885 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2886 continue;
2887 rates++;
2888 }
2889 if (rates > 8)
2890 rates = 8;
2891
2892 if (skb_tailroom(skb) < rates + 2)
2893 return -ENOMEM;
2894
2895 pos = skb_put(skb, rates + 2);
2896 *pos++ = WLAN_EID_SUPP_RATES;
2897 *pos++ = rates;
2898 for (i = 0; i < rates; i++) {
2899 u8 basic = 0;
2900 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2901 continue;
2902
2903 if (need_basic && basic_rates & BIT(i))
2904 basic = 0x80;
2905 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2906 5 * (1 << shift));
2907 *pos++ = basic | (u8) rate;
2908 }
2909
2910 return 0;
2911 }
2912
2913 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2914 struct sk_buff *skb, bool need_basic,
2915 enum nl80211_band band)
2916 {
2917 struct ieee80211_local *local = sdata->local;
2918 struct ieee80211_supported_band *sband;
2919 int rate, shift;
2920 u8 i, exrates, *pos;
2921 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2922 u32 rate_flags;
2923
2924 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2925 shift = ieee80211_vif_get_shift(&sdata->vif);
2926
2927 sband = local->hw.wiphy->bands[band];
2928 exrates = 0;
2929 for (i = 0; i < sband->n_bitrates; i++) {
2930 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2931 continue;
2932 exrates++;
2933 }
2934
2935 if (exrates > 8)
2936 exrates -= 8;
2937 else
2938 exrates = 0;
2939
2940 if (skb_tailroom(skb) < exrates + 2)
2941 return -ENOMEM;
2942
2943 if (exrates) {
2944 pos = skb_put(skb, exrates + 2);
2945 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2946 *pos++ = exrates;
2947 for (i = 8; i < sband->n_bitrates; i++) {
2948 u8 basic = 0;
2949 if ((rate_flags & sband->bitrates[i].flags)
2950 != rate_flags)
2951 continue;
2952 if (need_basic && basic_rates & BIT(i))
2953 basic = 0x80;
2954 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2955 5 * (1 << shift));
2956 *pos++ = basic | (u8) rate;
2957 }
2958 }
2959 return 0;
2960 }
2961
2962 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2963 {
2964 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2966
2967 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2968 /* non-managed type inferfaces */
2969 return 0;
2970 }
2971 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2972 }
2973 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2974
2975 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2976 {
2977 if (!mcs)
2978 return 1;
2979
2980 /* TODO: consider rx_highest */
2981
2982 if (mcs->rx_mask[3])
2983 return 4;
2984 if (mcs->rx_mask[2])
2985 return 3;
2986 if (mcs->rx_mask[1])
2987 return 2;
2988 return 1;
2989 }
2990
2991 /**
2992 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2993 * @local: mac80211 hw info struct
2994 * @status: RX status
2995 * @mpdu_len: total MPDU length (including FCS)
2996 * @mpdu_offset: offset into MPDU to calculate timestamp at
2997 *
2998 * This function calculates the RX timestamp at the given MPDU offset, taking
2999 * into account what the RX timestamp was. An offset of 0 will just normalize
3000 * the timestamp to TSF at beginning of MPDU reception.
3001 */
3002 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3003 struct ieee80211_rx_status *status,
3004 unsigned int mpdu_len,
3005 unsigned int mpdu_offset)
3006 {
3007 u64 ts = status->mactime;
3008 struct rate_info ri;
3009 u16 rate;
3010
3011 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3012 return 0;
3013
3014 memset(&ri, 0, sizeof(ri));
3015
3016 ri.bw = status->bw;
3017
3018 /* Fill cfg80211 rate info */
3019 switch (status->encoding) {
3020 case RX_ENC_HT:
3021 ri.mcs = status->rate_idx;
3022 ri.flags |= RATE_INFO_FLAGS_MCS;
3023 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3024 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3025 break;
3026 case RX_ENC_VHT:
3027 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3028 ri.mcs = status->rate_idx;
3029 ri.nss = status->nss;
3030 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3031 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3032 break;
3033 default:
3034 WARN_ON(1);
3035 /* fall through */
3036 case RX_ENC_LEGACY: {
3037 struct ieee80211_supported_band *sband;
3038 int shift = 0;
3039 int bitrate;
3040
3041 switch (status->bw) {
3042 case RATE_INFO_BW_10:
3043 shift = 1;
3044 break;
3045 case RATE_INFO_BW_5:
3046 shift = 2;
3047 break;
3048 }
3049
3050 sband = local->hw.wiphy->bands[status->band];
3051 bitrate = sband->bitrates[status->rate_idx].bitrate;
3052 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3053
3054 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3055 /* TODO: handle HT/VHT preambles */
3056 if (status->band == NL80211_BAND_5GHZ) {
3057 ts += 20 << shift;
3058 mpdu_offset += 2;
3059 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3060 ts += 96;
3061 } else {
3062 ts += 192;
3063 }
3064 }
3065 break;
3066 }
3067 }
3068
3069 rate = cfg80211_calculate_bitrate(&ri);
3070 if (WARN_ONCE(!rate,
3071 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3072 (unsigned long long)status->flag, status->rate_idx,
3073 status->nss))
3074 return 0;
3075
3076 /* rewind from end of MPDU */
3077 if (status->flag & RX_FLAG_MACTIME_END)
3078 ts -= mpdu_len * 8 * 10 / rate;
3079
3080 ts += mpdu_offset * 8 * 10 / rate;
3081
3082 return ts;
3083 }
3084
3085 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3086 {
3087 struct ieee80211_sub_if_data *sdata;
3088 struct cfg80211_chan_def chandef;
3089
3090 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3091 ASSERT_RTNL();
3092
3093 mutex_lock(&local->mtx);
3094 list_for_each_entry(sdata, &local->interfaces, list) {
3095 /* it might be waiting for the local->mtx, but then
3096 * by the time it gets it, sdata->wdev.cac_started
3097 * will no longer be true
3098 */
3099 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3100
3101 if (sdata->wdev.cac_started) {
3102 chandef = sdata->vif.bss_conf.chandef;
3103 ieee80211_vif_release_channel(sdata);
3104 cfg80211_cac_event(sdata->dev,
3105 &chandef,
3106 NL80211_RADAR_CAC_ABORTED,
3107 GFP_KERNEL);
3108 }
3109 }
3110 mutex_unlock(&local->mtx);
3111 }
3112
3113 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3114 {
3115 struct ieee80211_local *local =
3116 container_of(work, struct ieee80211_local, radar_detected_work);
3117 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3118 struct ieee80211_chanctx *ctx;
3119 int num_chanctx = 0;
3120
3121 mutex_lock(&local->chanctx_mtx);
3122 list_for_each_entry(ctx, &local->chanctx_list, list) {
3123 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3124 continue;
3125
3126 num_chanctx++;
3127 chandef = ctx->conf.def;
3128 }
3129 mutex_unlock(&local->chanctx_mtx);
3130
3131 rtnl_lock();
3132 ieee80211_dfs_cac_cancel(local);
3133 rtnl_unlock();
3134
3135 if (num_chanctx > 1)
3136 /* XXX: multi-channel is not supported yet */
3137 WARN_ON(1);
3138 else
3139 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3140 }
3141
3142 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3143 {
3144 struct ieee80211_local *local = hw_to_local(hw);
3145
3146 trace_api_radar_detected(local);
3147
3148 schedule_work(&local->radar_detected_work);
3149 }
3150 EXPORT_SYMBOL(ieee80211_radar_detected);
3151
3152 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3153 {
3154 u32 ret;
3155 int tmp;
3156
3157 switch (c->width) {
3158 case NL80211_CHAN_WIDTH_20:
3159 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3160 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3161 break;
3162 case NL80211_CHAN_WIDTH_40:
3163 c->width = NL80211_CHAN_WIDTH_20;
3164 c->center_freq1 = c->chan->center_freq;
3165 ret = IEEE80211_STA_DISABLE_40MHZ |
3166 IEEE80211_STA_DISABLE_VHT;
3167 break;
3168 case NL80211_CHAN_WIDTH_80:
3169 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3170 /* n_P40 */
3171 tmp /= 2;
3172 /* freq_P40 */
3173 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3174 c->width = NL80211_CHAN_WIDTH_40;
3175 ret = IEEE80211_STA_DISABLE_VHT;
3176 break;
3177 case NL80211_CHAN_WIDTH_80P80:
3178 c->center_freq2 = 0;
3179 c->width = NL80211_CHAN_WIDTH_80;
3180 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3181 IEEE80211_STA_DISABLE_160MHZ;
3182 break;
3183 case NL80211_CHAN_WIDTH_160:
3184 /* n_P20 */
3185 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3186 /* n_P80 */
3187 tmp /= 4;
3188 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3189 c->width = NL80211_CHAN_WIDTH_80;
3190 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3191 IEEE80211_STA_DISABLE_160MHZ;
3192 break;
3193 default:
3194 case NL80211_CHAN_WIDTH_20_NOHT:
3195 WARN_ON_ONCE(1);
3196 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3197 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3198 break;
3199 case NL80211_CHAN_WIDTH_5:
3200 case NL80211_CHAN_WIDTH_10:
3201 WARN_ON_ONCE(1);
3202 /* keep c->width */
3203 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3204 break;
3205 }
3206
3207 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3208
3209 return ret;
3210 }
3211
3212 /*
3213 * Returns true if smps_mode_new is strictly more restrictive than
3214 * smps_mode_old.
3215 */
3216 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3217 enum ieee80211_smps_mode smps_mode_new)
3218 {
3219 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3220 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3221 return false;
3222
3223 switch (smps_mode_old) {
3224 case IEEE80211_SMPS_STATIC:
3225 return false;
3226 case IEEE80211_SMPS_DYNAMIC:
3227 return smps_mode_new == IEEE80211_SMPS_STATIC;
3228 case IEEE80211_SMPS_OFF:
3229 return smps_mode_new != IEEE80211_SMPS_OFF;
3230 default:
3231 WARN_ON(1);
3232 }
3233
3234 return false;
3235 }
3236
3237 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3238 struct cfg80211_csa_settings *csa_settings)
3239 {
3240 struct sk_buff *skb;
3241 struct ieee80211_mgmt *mgmt;
3242 struct ieee80211_local *local = sdata->local;
3243 int freq;
3244 int hdr_len = offsetofend(struct ieee80211_mgmt,
3245 u.action.u.chan_switch);
3246 u8 *pos;
3247
3248 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3249 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3250 return -EOPNOTSUPP;
3251
3252 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3253 5 + /* channel switch announcement element */
3254 3 + /* secondary channel offset element */
3255 5 + /* wide bandwidth channel switch announcement */
3256 8); /* mesh channel switch parameters element */
3257 if (!skb)
3258 return -ENOMEM;
3259
3260 skb_reserve(skb, local->tx_headroom);
3261 mgmt = skb_put_zero(skb, hdr_len);
3262 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3263 IEEE80211_STYPE_ACTION);
3264
3265 eth_broadcast_addr(mgmt->da);
3266 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3267 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3268 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3269 } else {
3270 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3271 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3272 }
3273 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3274 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3275 pos = skb_put(skb, 5);
3276 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3277 *pos++ = 3; /* IE length */
3278 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3279 freq = csa_settings->chandef.chan->center_freq;
3280 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3281 *pos++ = csa_settings->count; /* count */
3282
3283 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3284 enum nl80211_channel_type ch_type;
3285
3286 skb_put(skb, 3);
3287 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3288 *pos++ = 1; /* IE length */
3289 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3290 if (ch_type == NL80211_CHAN_HT40PLUS)
3291 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3292 else
3293 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3294 }
3295
3296 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3297 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3298
3299 skb_put(skb, 8);
3300 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3301 *pos++ = 6; /* IE length */
3302 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3303 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3304 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3305 *pos++ |= csa_settings->block_tx ?
3306 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3307 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3308 pos += 2;
3309 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3310 pos += 2;
3311 }
3312
3313 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3314 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3315 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3316 skb_put(skb, 5);
3317 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3318 }
3319
3320 ieee80211_tx_skb(sdata, skb);
3321 return 0;
3322 }
3323
3324 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3325 {
3326 return !(cs == NULL || cs->cipher == 0 ||
3327 cs->hdr_len < cs->pn_len + cs->pn_off ||
3328 cs->hdr_len <= cs->key_idx_off ||
3329 cs->key_idx_shift > 7 ||
3330 cs->key_idx_mask == 0);
3331 }
3332
3333 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3334 {
3335 int i;
3336
3337 /* Ensure we have enough iftype bitmap space for all iftype values */
3338 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3339
3340 for (i = 0; i < n; i++)
3341 if (!ieee80211_cs_valid(&cs[i]))
3342 return false;
3343
3344 return true;
3345 }
3346
3347 const struct ieee80211_cipher_scheme *
3348 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3349 enum nl80211_iftype iftype)
3350 {
3351 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3352 int n = local->hw.n_cipher_schemes;
3353 int i;
3354 const struct ieee80211_cipher_scheme *cs = NULL;
3355
3356 for (i = 0; i < n; i++) {
3357 if (l[i].cipher == cipher) {
3358 cs = &l[i];
3359 break;
3360 }
3361 }
3362
3363 if (!cs || !(cs->iftype & BIT(iftype)))
3364 return NULL;
3365
3366 return cs;
3367 }
3368
3369 int ieee80211_cs_headroom(struct ieee80211_local *local,
3370 struct cfg80211_crypto_settings *crypto,
3371 enum nl80211_iftype iftype)
3372 {
3373 const struct ieee80211_cipher_scheme *cs;
3374 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3375 int i;
3376
3377 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3378 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3379 iftype);
3380
3381 if (cs && headroom < cs->hdr_len)
3382 headroom = cs->hdr_len;
3383 }
3384
3385 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3386 if (cs && headroom < cs->hdr_len)
3387 headroom = cs->hdr_len;
3388
3389 return headroom;
3390 }
3391
3392 static bool
3393 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3394 {
3395 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3396 int skip;
3397
3398 if (end > 0)
3399 return false;
3400
3401 /* One shot NOA */
3402 if (data->count[i] == 1)
3403 return false;
3404
3405 if (data->desc[i].interval == 0)
3406 return false;
3407
3408 /* End time is in the past, check for repetitions */
3409 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3410 if (data->count[i] < 255) {
3411 if (data->count[i] <= skip) {
3412 data->count[i] = 0;
3413 return false;
3414 }
3415
3416 data->count[i] -= skip;
3417 }
3418
3419 data->desc[i].start += skip * data->desc[i].interval;
3420
3421 return true;
3422 }
3423
3424 static bool
3425 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3426 s32 *offset)
3427 {
3428 bool ret = false;
3429 int i;
3430
3431 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3432 s32 cur;
3433
3434 if (!data->count[i])
3435 continue;
3436
3437 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3438 ret = true;
3439
3440 cur = data->desc[i].start - tsf;
3441 if (cur > *offset)
3442 continue;
3443
3444 cur = data->desc[i].start + data->desc[i].duration - tsf;
3445 if (cur > *offset)
3446 *offset = cur;
3447 }
3448
3449 return ret;
3450 }
3451
3452 static u32
3453 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3454 {
3455 s32 offset = 0;
3456 int tries = 0;
3457 /*
3458 * arbitrary limit, used to avoid infinite loops when combined NoA
3459 * descriptors cover the full time period.
3460 */
3461 int max_tries = 5;
3462
3463 ieee80211_extend_absent_time(data, tsf, &offset);
3464 do {
3465 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3466 break;
3467
3468 tries++;
3469 } while (tries < max_tries);
3470
3471 return offset;
3472 }
3473
3474 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3475 {
3476 u32 next_offset = BIT(31) - 1;
3477 int i;
3478
3479 data->absent = 0;
3480 data->has_next_tsf = false;
3481 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3482 s32 start;
3483
3484 if (!data->count[i])
3485 continue;
3486
3487 ieee80211_extend_noa_desc(data, tsf, i);
3488 start = data->desc[i].start - tsf;
3489 if (start <= 0)
3490 data->absent |= BIT(i);
3491
3492 if (next_offset > start)
3493 next_offset = start;
3494
3495 data->has_next_tsf = true;
3496 }
3497
3498 if (data->absent)
3499 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3500
3501 data->next_tsf = tsf + next_offset;
3502 }
3503 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3504
3505 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3506 struct ieee80211_noa_data *data, u32 tsf)
3507 {
3508 int ret = 0;
3509 int i;
3510
3511 memset(data, 0, sizeof(*data));
3512
3513 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3514 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3515
3516 if (!desc->count || !desc->duration)
3517 continue;
3518
3519 data->count[i] = desc->count;
3520 data->desc[i].start = le32_to_cpu(desc->start_time);
3521 data->desc[i].duration = le32_to_cpu(desc->duration);
3522 data->desc[i].interval = le32_to_cpu(desc->interval);
3523
3524 if (data->count[i] > 1 &&
3525 data->desc[i].interval < data->desc[i].duration)
3526 continue;
3527
3528 ieee80211_extend_noa_desc(data, tsf, i);
3529 ret++;
3530 }
3531
3532 if (ret)
3533 ieee80211_update_p2p_noa(data, tsf);
3534
3535 return ret;
3536 }
3537 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3538
3539 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3540 struct ieee80211_sub_if_data *sdata)
3541 {
3542 u64 tsf = drv_get_tsf(local, sdata);
3543 u64 dtim_count = 0;
3544 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3545 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3546 struct ps_data *ps;
3547 u8 bcns_from_dtim;
3548
3549 if (tsf == -1ULL || !beacon_int || !dtim_period)
3550 return;
3551
3552 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3553 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3554 if (!sdata->bss)
3555 return;
3556
3557 ps = &sdata->bss->ps;
3558 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3559 ps = &sdata->u.mesh.ps;
3560 } else {
3561 return;
3562 }
3563
3564 /*
3565 * actually finds last dtim_count, mac80211 will update in
3566 * __beacon_add_tim().
3567 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3568 */
3569 do_div(tsf, beacon_int);
3570 bcns_from_dtim = do_div(tsf, dtim_period);
3571 /* just had a DTIM */
3572 if (!bcns_from_dtim)
3573 dtim_count = 0;
3574 else
3575 dtim_count = dtim_period - bcns_from_dtim;
3576
3577 ps->dtim_count = dtim_count;
3578 }
3579
3580 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3581 struct ieee80211_chanctx *ctx)
3582 {
3583 struct ieee80211_sub_if_data *sdata;
3584 u8 radar_detect = 0;
3585
3586 lockdep_assert_held(&local->chanctx_mtx);
3587
3588 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3589 return 0;
3590
3591 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3592 if (sdata->reserved_radar_required)
3593 radar_detect |= BIT(sdata->reserved_chandef.width);
3594
3595 /*
3596 * An in-place reservation context should not have any assigned vifs
3597 * until it replaces the other context.
3598 */
3599 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3600 !list_empty(&ctx->assigned_vifs));
3601
3602 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3603 if (sdata->radar_required)
3604 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3605
3606 return radar_detect;
3607 }
3608
3609 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3610 const struct cfg80211_chan_def *chandef,
3611 enum ieee80211_chanctx_mode chanmode,
3612 u8 radar_detect)
3613 {
3614 struct ieee80211_local *local = sdata->local;
3615 struct ieee80211_sub_if_data *sdata_iter;
3616 enum nl80211_iftype iftype = sdata->wdev.iftype;
3617 struct ieee80211_chanctx *ctx;
3618 int total = 1;
3619 struct iface_combination_params params = {
3620 .radar_detect = radar_detect,
3621 };
3622
3623 lockdep_assert_held(&local->chanctx_mtx);
3624
3625 if (WARN_ON(hweight32(radar_detect) > 1))
3626 return -EINVAL;
3627
3628 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3629 !chandef->chan))
3630 return -EINVAL;
3631
3632 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3633 return -EINVAL;
3634
3635 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3636 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3637 /*
3638 * always passing this is harmless, since it'll be the
3639 * same value that cfg80211 finds if it finds the same
3640 * interface ... and that's always allowed
3641 */
3642 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3643 }
3644
3645 /* Always allow software iftypes */
3646 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3647 if (radar_detect)
3648 return -EINVAL;
3649 return 0;
3650 }
3651
3652 if (chandef)
3653 params.num_different_channels = 1;
3654
3655 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3656 params.iftype_num[iftype] = 1;
3657
3658 list_for_each_entry(ctx, &local->chanctx_list, list) {
3659 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3660 continue;
3661 params.radar_detect |=
3662 ieee80211_chanctx_radar_detect(local, ctx);
3663 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3664 params.num_different_channels++;
3665 continue;
3666 }
3667 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3668 cfg80211_chandef_compatible(chandef,
3669 &ctx->conf.def))
3670 continue;
3671 params.num_different_channels++;
3672 }
3673
3674 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3675 struct wireless_dev *wdev_iter;
3676
3677 wdev_iter = &sdata_iter->wdev;
3678
3679 if (sdata_iter == sdata ||
3680 !ieee80211_sdata_running(sdata_iter) ||
3681 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3682 continue;
3683
3684 params.iftype_num[wdev_iter->iftype]++;
3685 total++;
3686 }
3687
3688 if (total == 1 && !params.radar_detect)
3689 return 0;
3690
3691 return cfg80211_check_combinations(local->hw.wiphy, &params);
3692 }
3693
3694 static void
3695 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3696 void *data)
3697 {
3698 u32 *max_num_different_channels = data;
3699
3700 *max_num_different_channels = max(*max_num_different_channels,
3701 c->num_different_channels);
3702 }
3703
3704 int ieee80211_max_num_channels(struct ieee80211_local *local)
3705 {
3706 struct ieee80211_sub_if_data *sdata;
3707 struct ieee80211_chanctx *ctx;
3708 u32 max_num_different_channels = 1;
3709 int err;
3710 struct iface_combination_params params = {0};
3711
3712 lockdep_assert_held(&local->chanctx_mtx);
3713
3714 list_for_each_entry(ctx, &local->chanctx_list, list) {
3715 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3716 continue;
3717
3718 params.num_different_channels++;
3719
3720 params.radar_detect |=
3721 ieee80211_chanctx_radar_detect(local, ctx);
3722 }
3723
3724 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3725 params.iftype_num[sdata->wdev.iftype]++;
3726
3727 err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3728 ieee80211_iter_max_chans,
3729 &max_num_different_channels);
3730 if (err < 0)
3731 return err;
3732
3733 return max_num_different_channels;
3734 }
3735
3736 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3737 {
3738 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3739 *buf++ = 7; /* len */
3740 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3741 *buf++ = 0x50;
3742 *buf++ = 0xf2;
3743 *buf++ = 2; /* WME */
3744 *buf++ = 0; /* WME info */
3745 *buf++ = 1; /* WME ver */
3746 *buf++ = qosinfo; /* U-APSD no in use */
3747
3748 return buf;
3749 }
3750
3751 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3752 unsigned long *frame_cnt,
3753 unsigned long *byte_cnt)
3754 {
3755 struct txq_info *txqi = to_txq_info(txq);
3756 u32 frag_cnt = 0, frag_bytes = 0;
3757 struct sk_buff *skb;
3758
3759 skb_queue_walk(&txqi->frags, skb) {
3760 frag_cnt++;
3761 frag_bytes += skb->len;
3762 }
3763
3764 if (frame_cnt)
3765 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3766
3767 if (byte_cnt)
3768 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3769 }
3770 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3771
3772 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3773 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3774 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3775 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3776 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3777 };
Linux with added FPC-III support