mac80211: fix powersave bug and clean up ieee80211_rx_bss_info
[deliverable/linux.git] / net / mac80211 / util.c
CommitLineData
c2d1560a
JB
1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
bc3b2d7f 16#include <linux/export.h>
c2d1560a
JB
17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
c2d1560a 22#include <linux/bitmap.h>
dd76986b 23#include <linux/crc32.h>
881d966b 24#include <net/net_namespace.h>
c2d1560a 25#include <net/cfg80211.h>
dabeb344 26#include <net/rtnetlink.h>
c2d1560a
JB
27
28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7 30#include "rate.h"
ee385855 31#include "mesh.h"
c2d1560a 32#include "wme.h"
f2753ddb 33#include "led.h"
fffd0934 34#include "wep.h"
c2d1560a
JB
35
36/* privid for wiphys to determine whether they belong to us or not */
37void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
9a95371a
LR
39struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
c2d1560a 48
71364716 49u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
05c914fe 50 enum nl80211_iftype type)
c2d1560a 51{
a494bb1c 52 __le16 fc = hdr->frame_control;
c2d1560a 53
98f0b0a3
RR
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
c2d1560a
JB
56 return NULL;
57
a494bb1c 58 if (ieee80211_is_data(fc)) {
98f0b0a3
RR
59 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
a494bb1c
HH
61
62 if (ieee80211_has_a4(fc))
c2d1560a 63 return NULL;
a494bb1c
HH
64 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
c2d1560a 67 return hdr->addr2;
a494bb1c
HH
68
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
98f0b0a3
RR
73 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
c2d1560a 75 return hdr->addr3;
a494bb1c
HH
76 }
77
78 if (ieee80211_is_ctl(fc)) {
79 if(ieee80211_is_pspoll(fc))
c2d1560a 80 return hdr->addr1;
a494bb1c
HH
81
82 if (ieee80211_is_back_req(fc)) {
71364716 83 switch (type) {
05c914fe 84 case NL80211_IFTYPE_STATION:
71364716 85 return hdr->addr2;
05c914fe
JB
86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
71364716
RR
88 return hdr->addr1;
89 default:
a494bb1c 90 break; /* fall through to the return */
71364716
RR
91 }
92 }
c2d1560a
JB
93 }
94
95 return NULL;
96}
97
5cf121c3 98void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
c2d1560a 99{
252b86c4 100 struct sk_buff *skb;
2de8e0d9
JB
101 struct ieee80211_hdr *hdr;
102
252b86c4 103 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9
JB
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
252b86c4 106 }
c2d1560a
JB
107}
108
4ee73f33 109int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
c2d1560a
JB
110 int rate, int erp, int short_preamble)
111{
112 int dur;
113
114 /* calculate duration (in microseconds, rounded up to next higher
115 * integer if it includes a fractional microsecond) to send frame of
116 * len bytes (does not include FCS) at the given rate. Duration will
117 * also include SIFS.
118 *
119 * rate is in 100 kbps, so divident is multiplied by 10 in the
120 * DIV_ROUND_UP() operations.
121 */
122
4ee73f33 123 if (band == IEEE80211_BAND_5GHZ || erp) {
c2d1560a
JB
124 /*
125 * OFDM:
126 *
127 * N_DBPS = DATARATE x 4
128 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129 * (16 = SIGNAL time, 6 = tail bits)
130 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
131 *
132 * T_SYM = 4 usec
133 * 802.11a - 17.5.2: aSIFSTime = 16 usec
134 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135 * signal ext = 6 usec
136 */
c2d1560a
JB
137 dur = 16; /* SIFS + signal ext */
138 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
141 4 * rate); /* T_SYM x N_SYM */
142 } else {
143 /*
144 * 802.11b or 802.11g with 802.11b compatibility:
145 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
147 *
148 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149 * aSIFSTime = 10 usec
150 * aPreambleLength = 144 usec or 72 usec with short preamble
151 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
152 */
153 dur = 10; /* aSIFSTime = 10 usec */
154 dur += short_preamble ? (72 + 24) : (144 + 48);
155
156 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
157 }
158
159 return dur;
160}
161
162/* Exported duration function for driver use */
32bfd35d
JB
163__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
164 struct ieee80211_vif *vif,
4ee73f33 165 enum ieee80211_band band,
8318d78a
JB
166 size_t frame_len,
167 struct ieee80211_rate *rate)
c2d1560a 168{
25d834e1 169 struct ieee80211_sub_if_data *sdata;
c2d1560a
JB
170 u16 dur;
171 int erp;
25d834e1 172 bool short_preamble = false;
c2d1560a 173
8318d78a 174 erp = 0;
25d834e1
JB
175 if (vif) {
176 sdata = vif_to_sdata(vif);
bda3933a 177 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB
178 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179 erp = rate->flags & IEEE80211_RATE_ERP_G;
180 }
8318d78a 181
4ee73f33 182 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
25d834e1 183 short_preamble);
c2d1560a
JB
184
185 return cpu_to_le16(dur);
186}
187EXPORT_SYMBOL(ieee80211_generic_frame_duration);
188
32bfd35d
JB
189__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
190 struct ieee80211_vif *vif, size_t frame_len,
e039fa4a 191 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB
192{
193 struct ieee80211_local *local = hw_to_local(hw);
194 struct ieee80211_rate *rate;
25d834e1 195 struct ieee80211_sub_if_data *sdata;
471b3efd 196 bool short_preamble;
c2d1560a
JB
197 int erp;
198 u16 dur;
2e92e6f2
JB
199 struct ieee80211_supported_band *sband;
200
4ee73f33 201 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 202
25d834e1 203 short_preamble = false;
7e9ed188 204
e039fa4a 205 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a
JB
206
207 erp = 0;
25d834e1
JB
208 if (vif) {
209 sdata = vif_to_sdata(vif);
bda3933a 210 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB
211 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
212 erp = rate->flags & IEEE80211_RATE_ERP_G;
213 }
c2d1560a
JB
214
215 /* CTS duration */
4ee73f33 216 dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
c2d1560a
JB
217 erp, short_preamble);
218 /* Data frame duration */
4ee73f33 219 dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
c2d1560a
JB
220 erp, short_preamble);
221 /* ACK duration */
4ee73f33 222 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
c2d1560a
JB
223 erp, short_preamble);
224
225 return cpu_to_le16(dur);
226}
227EXPORT_SYMBOL(ieee80211_rts_duration);
228
32bfd35d
JB
229__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
230 struct ieee80211_vif *vif,
c2d1560a 231 size_t frame_len,
e039fa4a 232 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB
233{
234 struct ieee80211_local *local = hw_to_local(hw);
235 struct ieee80211_rate *rate;
25d834e1 236 struct ieee80211_sub_if_data *sdata;
471b3efd 237 bool short_preamble;
c2d1560a
JB
238 int erp;
239 u16 dur;
2e92e6f2
JB
240 struct ieee80211_supported_band *sband;
241
4ee73f33 242 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 243
25d834e1 244 short_preamble = false;
7e9ed188 245
e039fa4a 246 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a 247 erp = 0;
25d834e1
JB
248 if (vif) {
249 sdata = vif_to_sdata(vif);
bda3933a 250 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB
251 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
252 erp = rate->flags & IEEE80211_RATE_ERP_G;
253 }
c2d1560a
JB
254
255 /* Data frame duration */
4ee73f33 256 dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
c2d1560a 257 erp, short_preamble);
e039fa4a 258 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
c2d1560a 259 /* ACK duration */
4ee73f33 260 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
c2d1560a
JB
261 erp, short_preamble);
262 }
263
264 return cpu_to_le16(dur);
265}
266EXPORT_SYMBOL(ieee80211_ctstoself_duration);
267
3a25a8c8
JB
268void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
269{
270 struct ieee80211_sub_if_data *sdata;
a6f38ac3
JB
271 int n_acs = IEEE80211_NUM_ACS;
272
273 if (local->hw.queues < IEEE80211_NUM_ACS)
274 n_acs = 1;
3a25a8c8
JB
275
276 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
277 int ac;
278
f142c6b9
JB
279 if (!sdata->dev)
280 continue;
281
3a25a8c8
JB
282 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
283 continue;
284
285 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
286 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
287 continue;
288
a6f38ac3 289 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB
290 int ac_queue = sdata->vif.hw_queue[ac];
291
292 if (ac_queue == queue ||
293 (sdata->vif.cab_queue == queue &&
294 local->queue_stop_reasons[ac_queue] == 0 &&
295 skb_queue_empty(&local->pending[ac_queue])))
296 netif_wake_subqueue(sdata->dev, ac);
297 }
298 }
299}
300
ce7c9111
KV
301static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
302 enum queue_stop_reason reason)
c2d1560a
JB
303{
304 struct ieee80211_local *local = hw_to_local(hw);
305
b5878a2d
JB
306 trace_wake_queue(local, queue, reason);
307
e4e72fb4
JB
308 if (WARN_ON(queue >= hw->queues))
309 return;
ce7c9111 310
ada15125
JB
311 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
312 return;
313
96f5e66e
JB
314 __clear_bit(reason, &local->queue_stop_reasons[queue]);
315
316 if (local->queue_stop_reasons[queue] != 0)
317 /* someone still has this queue stopped */
318 return;
319
7236fe29
JB
320 if (skb_queue_empty(&local->pending[queue])) {
321 rcu_read_lock();
3a25a8c8 322 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB
323 rcu_read_unlock();
324 } else
3b8d81e0 325 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 326}
ce7c9111 327
96f5e66e
JB
328void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
329 enum queue_stop_reason reason)
ce7c9111
KV
330{
331 struct ieee80211_local *local = hw_to_local(hw);
332 unsigned long flags;
333
334 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
335 __ieee80211_wake_queue(hw, queue, reason);
336 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
337}
338
339void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
340{
341 ieee80211_wake_queue_by_reason(hw, queue,
342 IEEE80211_QUEUE_STOP_REASON_DRIVER);
343}
c2d1560a
JB
344EXPORT_SYMBOL(ieee80211_wake_queue);
345
ce7c9111
KV
346static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
c2d1560a
JB
348{
349 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 350 struct ieee80211_sub_if_data *sdata;
a6f38ac3 351 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 352
b5878a2d
JB
353 trace_stop_queue(local, queue, reason);
354
e4e72fb4
JB
355 if (WARN_ON(queue >= hw->queues))
356 return;
96f5e66e 357
ada15125
JB
358 if (test_bit(reason, &local->queue_stop_reasons[queue]))
359 return;
360
2a577d98 361 __set_bit(reason, &local->queue_stop_reasons[queue]);
cf0277e7 362
a6f38ac3
JB
363 if (local->hw.queues < IEEE80211_NUM_ACS)
364 n_acs = 1;
365
cf0277e7 366 rcu_read_lock();
3a25a8c8
JB
367 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
368 int ac;
369
f142c6b9
JB
370 if (!sdata->dev)
371 continue;
372
a6f38ac3 373 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB
374 if (sdata->vif.hw_queue[ac] == queue ||
375 sdata->vif.cab_queue == queue)
376 netif_stop_subqueue(sdata->dev, ac);
377 }
378 }
cf0277e7 379 rcu_read_unlock();
c2d1560a 380}
ce7c9111 381
96f5e66e
JB
382void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
383 enum queue_stop_reason reason)
ce7c9111
KV
384{
385 struct ieee80211_local *local = hw_to_local(hw);
386 unsigned long flags;
387
388 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
389 __ieee80211_stop_queue(hw, queue, reason);
390 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
391}
392
393void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
394{
395 ieee80211_stop_queue_by_reason(hw, queue,
396 IEEE80211_QUEUE_STOP_REASON_DRIVER);
397}
c2d1560a
JB
398EXPORT_SYMBOL(ieee80211_stop_queue);
399
8f77f384
JB
400void ieee80211_add_pending_skb(struct ieee80211_local *local,
401 struct sk_buff *skb)
402{
403 struct ieee80211_hw *hw = &local->hw;
404 unsigned long flags;
a7bc376c 405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 406 int queue = info->hw_queue;
a7bc376c
JB
407
408 if (WARN_ON(!info->control.vif)) {
d4fa14cd 409 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB
410 return;
411 }
8f77f384
JB
412
413 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
414 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
3b8d81e0 415 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB
416 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
417 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
418}
419
b0b97a8a
JB
420void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
421 struct sk_buff_head *skbs,
422 void (*fn)(void *data), void *data)
8f77f384
JB
423{
424 struct ieee80211_hw *hw = &local->hw;
425 struct sk_buff *skb;
426 unsigned long flags;
b0b97a8a 427 int queue, i;
8f77f384
JB
428
429 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 430 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB
431 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432
433 if (WARN_ON(!info->control.vif)) {
d4fa14cd 434 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB
435 continue;
436 }
437
3a25a8c8 438 queue = info->hw_queue;
4644ae89
JB
439
440 __ieee80211_stop_queue(hw, queue,
441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
442
3b8d81e0 443 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB
444 }
445
50a9432d
JB
446 if (fn)
447 fn(data);
448
3b8d81e0 449 for (i = 0; i < hw->queues; i++)
8f77f384
JB
450 __ieee80211_wake_queue(hw, i,
451 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
8f77f384 452 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB
453}
454
ce7c9111 455void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8
JB
456 unsigned long queues,
457 enum queue_stop_reason reason)
c2d1560a 458{
ce7c9111
KV
459 struct ieee80211_local *local = hw_to_local(hw);
460 unsigned long flags;
c2d1560a
JB
461 int i;
462
ce7c9111
KV
463 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
464
445ea4e8 465 for_each_set_bit(i, &queues, hw->queues)
ce7c9111
KV
466 __ieee80211_stop_queue(hw, i, reason);
467
468 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
469}
470
471void ieee80211_stop_queues(struct ieee80211_hw *hw)
472{
445ea4e8 473 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
ce7c9111 474 IEEE80211_QUEUE_STOP_REASON_DRIVER);
c2d1560a
JB
475}
476EXPORT_SYMBOL(ieee80211_stop_queues);
477
92ab8535
TW
478int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
479{
480 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB
481 unsigned long flags;
482 int ret;
96f5e66e 483
e4e72fb4
JB
484 if (WARN_ON(queue >= hw->queues))
485 return true;
96f5e66e 486
3b8d81e0 487 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP
488 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
489 &local->queue_stop_reasons[queue]);
3b8d81e0
JB
490 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
491 return ret;
92ab8535
TW
492}
493EXPORT_SYMBOL(ieee80211_queue_stopped);
494
ce7c9111 495void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 496 unsigned long queues,
ce7c9111 497 enum queue_stop_reason reason)
c2d1560a 498{
ce7c9111
KV
499 struct ieee80211_local *local = hw_to_local(hw);
500 unsigned long flags;
c2d1560a
JB
501 int i;
502
ce7c9111
KV
503 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
504
445ea4e8 505 for_each_set_bit(i, &queues, hw->queues)
ce7c9111
KV
506 __ieee80211_wake_queue(hw, i, reason);
507
508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
509}
510
511void ieee80211_wake_queues(struct ieee80211_hw *hw)
512{
445ea4e8
JB
513 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
514 IEEE80211_QUEUE_STOP_REASON_DRIVER);
c2d1560a
JB
515}
516EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 517
39ecc01d
JB
518void ieee80211_flush_queues(struct ieee80211_local *local,
519 struct ieee80211_sub_if_data *sdata)
520{
521 u32 queues;
522
523 if (!local->ops->flush)
524 return;
525
526 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
527 int ac;
528
529 queues = 0;
530
531 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
532 queues |= BIT(sdata->vif.hw_queue[ac]);
533 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
534 queues |= BIT(sdata->vif.cab_queue);
535 } else {
536 /* all queues */
537 queues = BIT(local->hw.queues) - 1;
538 }
539
445ea4e8
JB
540 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
541 IEEE80211_QUEUE_STOP_REASON_FLUSH);
542
39ecc01d 543 drv_flush(local, queues, false);
445ea4e8
JB
544
545 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
546 IEEE80211_QUEUE_STOP_REASON_FLUSH);
39ecc01d
JB
547}
548
32bfd35d 549void ieee80211_iterate_active_interfaces(
8b2c9824 550 struct ieee80211_hw *hw, u32 iter_flags,
32bfd35d
JB
551 void (*iterator)(void *data, u8 *mac,
552 struct ieee80211_vif *vif),
553 void *data)
dabeb344
JB
554{
555 struct ieee80211_local *local = hw_to_local(hw);
556 struct ieee80211_sub_if_data *sdata;
557
c771c9d8 558 mutex_lock(&local->iflist_mtx);
2f561feb
ID
559
560 list_for_each_entry(sdata, &local->interfaces, list) {
561 switch (sdata->vif.type) {
05c914fe 562 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF
563 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
564 continue;
565 break;
05c914fe 566 case NL80211_IFTYPE_AP_VLAN:
2f561feb 567 continue;
2ca27bcf 568 default:
2f561feb
ID
569 break;
570 }
8b2c9824
JB
571 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
572 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
573 continue;
9607e6b6 574 if (ieee80211_sdata_running(sdata))
47846c9b 575 iterator(data, sdata->vif.addr,
2f561feb
ID
576 &sdata->vif);
577 }
578
685fb72b
JB
579 sdata = rcu_dereference_protected(local->monitor_sdata,
580 lockdep_is_held(&local->iflist_mtx));
8b2c9824
JB
581 if (sdata &&
582 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
583 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b
JB
584 iterator(data, sdata->vif.addr, &sdata->vif);
585
c771c9d8 586 mutex_unlock(&local->iflist_mtx);
2f561feb
ID
587}
588EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
589
590void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 591 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID
592 void (*iterator)(void *data, u8 *mac,
593 struct ieee80211_vif *vif),
594 void *data)
595{
596 struct ieee80211_local *local = hw_to_local(hw);
597 struct ieee80211_sub_if_data *sdata;
598
e38bad47 599 rcu_read_lock();
dabeb344 600
e38bad47 601 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
51fb61e7 602 switch (sdata->vif.type) {
05c914fe 603 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF
604 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
605 continue;
606 break;
05c914fe 607 case NL80211_IFTYPE_AP_VLAN:
dabeb344 608 continue;
2ca27bcf 609 default:
dabeb344
JB
610 break;
611 }
8b2c9824
JB
612 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
613 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
614 continue;
9607e6b6 615 if (ieee80211_sdata_running(sdata))
47846c9b 616 iterator(data, sdata->vif.addr,
32bfd35d 617 &sdata->vif);
dabeb344 618 }
e38bad47 619
685fb72b 620 sdata = rcu_dereference(local->monitor_sdata);
8b2c9824
JB
621 if (sdata &&
622 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
623 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b
JB
624 iterator(data, sdata->vif.addr, &sdata->vif);
625
e38bad47 626 rcu_read_unlock();
dabeb344 627}
2f561feb 628EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
37ffc8da 629
42935eca
LR
630/*
631 * Nothing should have been stuffed into the workqueue during
632 * the suspend->resume cycle. If this WARN is seen then there
633 * is a bug with either the driver suspend or something in
634 * mac80211 stuffing into the workqueue which we haven't yet
635 * cleared during mac80211's suspend cycle.
636 */
637static bool ieee80211_can_queue_work(struct ieee80211_local *local)
638{
ceb99fe0
JB
639 if (WARN(local->suspended && !local->resuming,
640 "queueing ieee80211 work while going to suspend\n"))
641 return false;
42935eca
LR
642
643 return true;
644}
645
646void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
647{
648 struct ieee80211_local *local = hw_to_local(hw);
649
650 if (!ieee80211_can_queue_work(local))
651 return;
652
653 queue_work(local->workqueue, work);
654}
655EXPORT_SYMBOL(ieee80211_queue_work);
656
657void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
658 struct delayed_work *dwork,
659 unsigned long delay)
660{
661 struct ieee80211_local *local = hw_to_local(hw);
662
663 if (!ieee80211_can_queue_work(local))
664 return;
665
666 queue_delayed_work(local->workqueue, dwork, delay);
667}
668EXPORT_SYMBOL(ieee80211_queue_delayed_work);
669
b2e506bf 670u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, bool action,
dd76986b
JB
671 struct ieee802_11_elems *elems,
672 u64 filter, u32 crc)
673{
674 size_t left = len;
675 u8 *pos = start;
676 bool calc_crc = filter != 0;
fcff4f10 677 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 678 const u8 *ie;
dd76986b 679
fcff4f10 680 bitmap_zero(seen_elems, 256);
dd76986b
JB
681 memset(elems, 0, sizeof(*elems));
682 elems->ie_start = start;
683 elems->total_len = len;
684
685 while (left >= 2) {
686 u8 id, elen;
fcff4f10 687 bool elem_parse_failed;
dd76986b
JB
688
689 id = *pos++;
690 elen = *pos++;
691 left -= 2;
692
fcff4f10
PS
693 if (elen > left) {
694 elems->parse_error = true;
dd76986b 695 break;
fcff4f10
PS
696 }
697
9690fb16
JB
698 switch (id) {
699 case WLAN_EID_SSID:
700 case WLAN_EID_SUPP_RATES:
701 case WLAN_EID_FH_PARAMS:
702 case WLAN_EID_DS_PARAMS:
703 case WLAN_EID_CF_PARAMS:
704 case WLAN_EID_TIM:
705 case WLAN_EID_IBSS_PARAMS:
706 case WLAN_EID_CHALLENGE:
707 case WLAN_EID_RSN:
708 case WLAN_EID_ERP_INFO:
709 case WLAN_EID_EXT_SUPP_RATES:
710 case WLAN_EID_HT_CAPABILITY:
711 case WLAN_EID_HT_OPERATION:
712 case WLAN_EID_VHT_CAPABILITY:
713 case WLAN_EID_VHT_OPERATION:
714 case WLAN_EID_MESH_ID:
715 case WLAN_EID_MESH_CONFIG:
716 case WLAN_EID_PEER_MGMT:
717 case WLAN_EID_PREQ:
718 case WLAN_EID_PREP:
719 case WLAN_EID_PERR:
720 case WLAN_EID_RANN:
721 case WLAN_EID_CHANNEL_SWITCH:
722 case WLAN_EID_EXT_CHANSWITCH_ANN:
723 case WLAN_EID_COUNTRY:
724 case WLAN_EID_PWR_CONSTRAINT:
725 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 726 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf
JB
727 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
728 /*
729 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
730 * that if the content gets bigger it might be needed more than once
731 */
9690fb16
JB
732 if (test_bit(id, seen_elems)) {
733 elems->parse_error = true;
734 left -= elen;
735 pos += elen;
736 continue;
737 }
738 break;
fcff4f10 739 }
dd76986b
JB
740
741 if (calc_crc && id < 64 && (filter & (1ULL << id)))
742 crc = crc32_be(crc, pos - 2, elen + 2);
743
fcff4f10
PS
744 elem_parse_failed = false;
745
dd76986b
JB
746 switch (id) {
747 case WLAN_EID_SSID:
748 elems->ssid = pos;
749 elems->ssid_len = elen;
750 break;
751 case WLAN_EID_SUPP_RATES:
752 elems->supp_rates = pos;
753 elems->supp_rates_len = elen;
754 break;
dd76986b 755 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB
756 if (elen >= 1)
757 elems->ds_params = pos;
758 else
759 elem_parse_failed = true;
dd76986b 760 break;
dd76986b
JB
761 case WLAN_EID_TIM:
762 if (elen >= sizeof(struct ieee80211_tim_ie)) {
763 elems->tim = (void *)pos;
764 elems->tim_len = elen;
fcff4f10
PS
765 } else
766 elem_parse_failed = true;
dd76986b 767 break;
dd76986b
JB
768 case WLAN_EID_CHALLENGE:
769 elems->challenge = pos;
770 elems->challenge_len = elen;
771 break;
772 case WLAN_EID_VENDOR_SPECIFIC:
773 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
774 pos[2] == 0xf2) {
775 /* Microsoft OUI (00:50:F2) */
776
777 if (calc_crc)
778 crc = crc32_be(crc, pos - 2, elen + 2);
779
441a33ba 780 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB
781 /* OUI Type 2 - WMM IE */
782 if (pos[4] == 0) {
783 elems->wmm_info = pos;
784 elems->wmm_info_len = elen;
785 } else if (pos[4] == 1) {
786 elems->wmm_param = pos;
787 elems->wmm_param_len = elen;
788 }
789 }
790 }
791 break;
792 case WLAN_EID_RSN:
793 elems->rsn = pos;
794 elems->rsn_len = elen;
795 break;
796 case WLAN_EID_ERP_INFO:
1946bed9
JB
797 if (elen >= 1)
798 elems->erp_info = pos;
799 else
800 elem_parse_failed = true;
dd76986b
JB
801 break;
802 case WLAN_EID_EXT_SUPP_RATES:
803 elems->ext_supp_rates = pos;
804 elems->ext_supp_rates_len = elen;
805 break;
806 case WLAN_EID_HT_CAPABILITY:
807 if (elen >= sizeof(struct ieee80211_ht_cap))
808 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS
809 else
810 elem_parse_failed = true;
dd76986b 811 break;
074d46d1
JB
812 case WLAN_EID_HT_OPERATION:
813 if (elen >= sizeof(struct ieee80211_ht_operation))
814 elems->ht_operation = (void *)pos;
fcff4f10
PS
815 else
816 elem_parse_failed = true;
dd76986b 817 break;
818255ea
MP
818 case WLAN_EID_VHT_CAPABILITY:
819 if (elen >= sizeof(struct ieee80211_vht_cap))
820 elems->vht_cap_elem = (void *)pos;
821 else
822 elem_parse_failed = true;
823 break;
824 case WLAN_EID_VHT_OPERATION:
825 if (elen >= sizeof(struct ieee80211_vht_operation))
826 elems->vht_operation = (void *)pos;
827 else
828 elem_parse_failed = true;
829 break;
bee7f586
JB
830 case WLAN_EID_OPMODE_NOTIF:
831 if (elen > 0)
832 elems->opmode_notif = pos;
833 else
834 elem_parse_failed = true;
835 break;
dd76986b
JB
836 case WLAN_EID_MESH_ID:
837 elems->mesh_id = pos;
838 elems->mesh_id_len = elen;
839 break;
840 case WLAN_EID_MESH_CONFIG:
841 if (elen >= sizeof(struct ieee80211_meshconf_ie))
842 elems->mesh_config = (void *)pos;
fcff4f10
PS
843 else
844 elem_parse_failed = true;
dd76986b
JB
845 break;
846 case WLAN_EID_PEER_MGMT:
847 elems->peering = pos;
848 elems->peering_len = elen;
849 break;
3f52b7e3
MP
850 case WLAN_EID_MESH_AWAKE_WINDOW:
851 if (elen >= 2)
852 elems->awake_window = (void *)pos;
853 break;
dd76986b
JB
854 case WLAN_EID_PREQ:
855 elems->preq = pos;
856 elems->preq_len = elen;
857 break;
858 case WLAN_EID_PREP:
859 elems->prep = pos;
860 elems->prep_len = elen;
861 break;
862 case WLAN_EID_PERR:
863 elems->perr = pos;
864 elems->perr_len = elen;
865 break;
866 case WLAN_EID_RANN:
867 if (elen >= sizeof(struct ieee80211_rann_ie))
868 elems->rann = (void *)pos;
fcff4f10
PS
869 else
870 elem_parse_failed = true;
dd76986b
JB
871 break;
872 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB
873 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
874 elem_parse_failed = true;
875 break;
876 }
877 elems->ch_switch_ie = (void *)pos;
dd76986b 878 break;
b4f286a1
JB
879 case WLAN_EID_EXT_CHANSWITCH_ANN:
880 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
881 elem_parse_failed = true;
882 break;
883 }
884 elems->ext_chansw_ie = (void *)pos;
885 break;
85220d71
JB
886 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
887 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
888 elem_parse_failed = true;
889 break;
890 }
891 elems->sec_chan_offs = (void *)pos;
892 break;
b2e506bf
JB
893 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
894 if (!action ||
895 elen != sizeof(*elems->wide_bw_chansw_ie)) {
896 elem_parse_failed = true;
897 break;
898 }
899 elems->wide_bw_chansw_ie = (void *)pos;
900 break;
901 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
902 if (action) {
903 elem_parse_failed = true;
904 break;
905 }
906 /*
907 * This is a bit tricky, but as we only care about
908 * the wide bandwidth channel switch element, so
909 * just parse it out manually.
910 */
911 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
912 pos, elen);
913 if (ie) {
914 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
915 elems->wide_bw_chansw_ie =
916 (void *)(ie + 2);
917 else
918 elem_parse_failed = true;
919 }
920 break;
dd76986b
JB
921 case WLAN_EID_COUNTRY:
922 elems->country_elem = pos;
923 elems->country_elem_len = elen;
924 break;
925 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB
926 if (elen != 1) {
927 elem_parse_failed = true;
928 break;
929 }
dd76986b 930 elems->pwr_constr_elem = pos;
dd76986b
JB
931 break;
932 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB
933 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
934 elems->timeout_int = (void *)pos;
935 else
936 elem_parse_failed = true;
dd76986b
JB
937 break;
938 default:
939 break;
940 }
941
fcff4f10
PS
942 if (elem_parse_failed)
943 elems->parse_error = true;
944 else
5df45690 945 __set_bit(id, seen_elems);
fcff4f10 946
dd76986b
JB
947 left -= elen;
948 pos += elen;
949 }
950
fcff4f10
PS
951 if (left != 0)
952 elems->parse_error = true;
953
dd76986b
JB
954 return crc;
955}
956
3abead59
JB
957void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
958 bool bss_notify)
5825fe10
JB
959{
960 struct ieee80211_local *local = sdata->local;
961 struct ieee80211_tx_queue_params qparam;
55de908a 962 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 963 int ac;
a8ce8544 964 bool use_11b, enable_qos;
aa837e1d 965 int aCWmin, aCWmax;
5825fe10
JB
966
967 if (!local->ops->conf_tx)
968 return;
969
54bcbc69
JB
970 if (local->hw.queues < IEEE80211_NUM_ACS)
971 return;
972
5825fe10
JB
973 memset(&qparam, 0, sizeof(qparam));
974
55de908a
JB
975 rcu_read_lock();
976 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
977 use_11b = (chanctx_conf &&
4bf88530 978 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 979 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 980 rcu_read_unlock();
5825fe10 981
a8ce8544
SG
982 /*
983 * By default disable QoS in STA mode for old access points, which do
984 * not support 802.11e. New APs will provide proper queue parameters,
985 * that we will configure later.
986 */
987 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
988
54bcbc69 989 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
aa837e1d
JB
990 /* Set defaults according to 802.11-2007 Table 7-37 */
991 aCWmax = 1023;
992 if (use_11b)
993 aCWmin = 31;
994 else
995 aCWmin = 15;
996
a8ce8544
SG
997 if (enable_qos) {
998 switch (ac) {
999 case IEEE80211_AC_BK:
1000 qparam.cw_max = aCWmax;
1001 qparam.cw_min = aCWmin;
1002 qparam.txop = 0;
1003 qparam.aifs = 7;
1004 break;
1005 /* never happens but let's not leave undefined */
1006 default:
1007 case IEEE80211_AC_BE:
1008 qparam.cw_max = aCWmax;
1009 qparam.cw_min = aCWmin;
1010 qparam.txop = 0;
1011 qparam.aifs = 3;
1012 break;
1013 case IEEE80211_AC_VI:
1014 qparam.cw_max = aCWmin;
1015 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1016 if (use_11b)
1017 qparam.txop = 6016/32;
1018 else
1019 qparam.txop = 3008/32;
1020 qparam.aifs = 2;
1021 break;
1022 case IEEE80211_AC_VO:
1023 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1024 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1025 if (use_11b)
1026 qparam.txop = 3264/32;
1027 else
1028 qparam.txop = 1504/32;
1029 qparam.aifs = 2;
1030 break;
1031 }
1032 } else {
1033 /* Confiure old 802.11b/g medium access rules. */
7ba10a8e
JB
1034 qparam.cw_max = aCWmax;
1035 qparam.cw_min = aCWmin;
aa837e1d 1036 qparam.txop = 0;
aa837e1d 1037 qparam.aifs = 2;
aa837e1d 1038 }
5825fe10 1039
ab13315a
KV
1040 qparam.uapsd = false;
1041
54bcbc69
JB
1042 sdata->tx_conf[ac] = qparam;
1043 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1044 }
e1b3ec1a 1045
f142c6b9
JB
1046 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1047 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1048 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB
1049 if (bss_notify)
1050 ieee80211_bss_info_change_notify(sdata,
1051 BSS_CHANGED_QOS);
d9734979 1052 }
5825fe10 1053}
e50db65c 1054
46900298
JB
1055void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1056 const size_t supp_rates_len,
1057 const u8 *supp_rates)
1058{
55de908a 1059 struct ieee80211_chanctx_conf *chanctx_conf;
46900298
JB
1060 int i, have_higher_than_11mbit = 0;
1061
1062 /* cf. IEEE 802.11 9.2.12 */
1063 for (i = 0; i < supp_rates_len; i++)
1064 if ((supp_rates[i] & 0x7f) * 5 > 110)
1065 have_higher_than_11mbit = 1;
1066
55de908a
JB
1067 rcu_read_lock();
1068 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1069
1070 if (chanctx_conf &&
4bf88530 1071 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
46900298
JB
1072 have_higher_than_11mbit)
1073 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1074 else
1075 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
55de908a 1076 rcu_read_unlock();
46900298 1077
3abead59 1078 ieee80211_set_wmm_default(sdata, true);
46900298
JB
1079}
1080
46900298 1081void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1082 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1083 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB
1084 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1085 u32 tx_flags)
46900298
JB
1086{
1087 struct ieee80211_local *local = sdata->local;
1088 struct sk_buff *skb;
1089 struct ieee80211_mgmt *mgmt;
fffd0934 1090 int err;
46900298
JB
1091
1092 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
65fc73ac 1093 sizeof(*mgmt) + 6 + extra_len);
d15b8459 1094 if (!skb)
46900298 1095 return;
d15b8459 1096
46900298
JB
1097 skb_reserve(skb, local->hw.extra_tx_headroom);
1098
1099 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1100 memset(mgmt, 0, 24 + 6);
1101 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1102 IEEE80211_STYPE_AUTH);
efa6a09d 1103 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1104 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB
1105 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1106 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1107 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1108 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB
1109 if (extra)
1110 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1111
fffd0934
JB
1112 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1113 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1114 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1115 WARN_ON(err);
1116 }
1117
1672c0e3
JB
1118 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1119 tx_flags;
62ae67be 1120 ieee80211_tx_skb(sdata, skb);
46900298
JB
1121}
1122
6ae16775
AQ
1123void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1124 const u8 *bssid, u16 stype, u16 reason,
1125 bool send_frame, u8 *frame_buf)
1126{
1127 struct ieee80211_local *local = sdata->local;
1128 struct sk_buff *skb;
1129 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1130
1131 /* build frame */
1132 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1133 mgmt->duration = 0; /* initialize only */
1134 mgmt->seq_ctrl = 0; /* initialize only */
1135 memcpy(mgmt->da, bssid, ETH_ALEN);
1136 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1137 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1138 /* u.deauth.reason_code == u.disassoc.reason_code */
1139 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1140
1141 if (send_frame) {
1142 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1143 IEEE80211_DEAUTH_FRAME_LEN);
1144 if (!skb)
1145 return;
1146
1147 skb_reserve(skb, local->hw.extra_tx_headroom);
1148
1149 /* copy in frame */
1150 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1151 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1152
1153 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1154 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1155 IEEE80211_SKB_CB(skb)->flags |=
1156 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1157
1158 ieee80211_tx_skb(sdata, skb);
1159 }
1160}
1161
de95a54b 1162int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
c604b9f2 1163 size_t buffer_len, const u8 *ie, size_t ie_len,
651b5225
JM
1164 enum ieee80211_band band, u32 rate_mask,
1165 u8 channel)
de95a54b
JB
1166{
1167 struct ieee80211_supported_band *sband;
c604b9f2 1168 u8 *pos = buffer, *end = buffer + buffer_len;
8e664fb3
JB
1169 size_t offset = 0, noffset;
1170 int supp_rates_len, i;
8dcb2003
JM
1171 u8 rates[32];
1172 int num_rates;
1173 int ext_rates_len;
de95a54b 1174
4d36ec58 1175 sband = local->hw.wiphy->bands[band];
d811b3d5
AN
1176 if (WARN_ON_ONCE(!sband))
1177 return 0;
de95a54b 1178
8dcb2003
JM
1179 num_rates = 0;
1180 for (i = 0; i < sband->n_bitrates; i++) {
1181 if ((BIT(i) & rate_mask) == 0)
1182 continue; /* skip rate */
1183 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1184 }
1185
1186 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1187
c604b9f2
JB
1188 if (end - pos < 2 + supp_rates_len)
1189 goto out_err;
de95a54b 1190 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1191 *pos++ = supp_rates_len;
8dcb2003
JM
1192 memcpy(pos, rates, supp_rates_len);
1193 pos += supp_rates_len;
8e664fb3
JB
1194
1195 /* insert "request information" if in custom IEs */
1196 if (ie && ie_len) {
1197 static const u8 before_extrates[] = {
1198 WLAN_EID_SSID,
1199 WLAN_EID_SUPP_RATES,
1200 WLAN_EID_REQUEST,
1201 };
1202 noffset = ieee80211_ie_split(ie, ie_len,
1203 before_extrates,
1204 ARRAY_SIZE(before_extrates),
1205 offset);
c604b9f2
JB
1206 if (end - pos < noffset - offset)
1207 goto out_err;
8e664fb3
JB
1208 memcpy(pos, ie + offset, noffset - offset);
1209 pos += noffset - offset;
1210 offset = noffset;
1211 }
1212
8dcb2003
JM
1213 ext_rates_len = num_rates - supp_rates_len;
1214 if (ext_rates_len > 0) {
c604b9f2
JB
1215 if (end - pos < 2 + ext_rates_len)
1216 goto out_err;
8e664fb3 1217 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM
1218 *pos++ = ext_rates_len;
1219 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1220 pos += ext_rates_len;
8e664fb3
JB
1221 }
1222
651b5225 1223 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB
1224 if (end - pos < 3)
1225 goto out_err;
651b5225
JM
1226 *pos++ = WLAN_EID_DS_PARAMS;
1227 *pos++ = 1;
1228 *pos++ = channel;
1229 }
1230
8e664fb3
JB
1231 /* insert custom IEs that go before HT */
1232 if (ie && ie_len) {
1233 static const u8 before_ht[] = {
1234 WLAN_EID_SSID,
1235 WLAN_EID_SUPP_RATES,
1236 WLAN_EID_REQUEST,
1237 WLAN_EID_EXT_SUPP_RATES,
1238 WLAN_EID_DS_PARAMS,
1239 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1240 };
1241 noffset = ieee80211_ie_split(ie, ie_len,
1242 before_ht, ARRAY_SIZE(before_ht),
1243 offset);
c604b9f2
JB
1244 if (end - pos < noffset - offset)
1245 goto out_err;
8e664fb3
JB
1246 memcpy(pos, ie + offset, noffset - offset);
1247 pos += noffset - offset;
1248 offset = noffset;
de95a54b
JB
1249 }
1250
c604b9f2
JB
1251 if (sband->ht_cap.ht_supported) {
1252 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1253 goto out_err;
ef96a842
BG
1254 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1255 sband->ht_cap.cap);
c604b9f2 1256 }
5ef2d41a 1257
de95a54b
JB
1258 /*
1259 * If adding more here, adjust code in main.c
1260 * that calculates local->scan_ies_len.
1261 */
1262
8e664fb3
JB
1263 /* add any remaining custom IEs */
1264 if (ie && ie_len) {
1265 noffset = ie_len;
c604b9f2
JB
1266 if (end - pos < noffset - offset)
1267 goto out_err;
8e664fb3
JB
1268 memcpy(pos, ie + offset, noffset - offset);
1269 pos += noffset - offset;
de95a54b
JB
1270 }
1271
c604b9f2
JB
1272 if (sband->vht_cap.vht_supported) {
1273 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1274 goto out_err;
ba0afa2f
MP
1275 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1276 sband->vht_cap.cap);
c604b9f2 1277 }
ba0afa2f 1278
c604b9f2
JB
1279 return pos - buffer;
1280 out_err:
1281 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB
1282 return pos - buffer;
1283}
1284
a619a4c0 1285struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
85a237fe 1286 u8 *dst, u32 ratemask,
6b77863b 1287 struct ieee80211_channel *chan,
a619a4c0 1288 const u8 *ssid, size_t ssid_len,
a806c558
PS
1289 const u8 *ie, size_t ie_len,
1290 bool directed)
46900298
JB
1291{
1292 struct ieee80211_local *local = sdata->local;
46900298
JB
1293 struct sk_buff *skb;
1294 struct ieee80211_mgmt *mgmt;
6b77863b 1295 u8 chan_no;
b9a9ada1 1296 int ies_len;
46900298 1297
a806c558
PS
1298 /*
1299 * Do not send DS Channel parameter for directed probe requests
1300 * in order to maximize the chance that we get a response. Some
1301 * badly-behaved APs don't respond when this parameter is included.
1302 */
1303 if (directed)
6b77863b 1304 chan_no = 0;
a806c558 1305 else
6b77863b 1306 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
651b5225 1307
7c12ce8b 1308 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
b9a9ada1 1309 ssid, ssid_len, 100 + ie_len);
5b2bbf75 1310 if (!skb)
b9a9ada1
JB
1311 return NULL;
1312
1313 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1314 skb_tailroom(skb),
1315 ie, ie_len, chan->band,
1316 ratemask, chan_no);
1317 skb_put(skb, ies_len);
7c12ce8b 1318
46900298 1319 if (dst) {
7c12ce8b 1320 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB
1321 memcpy(mgmt->da, dst, ETH_ALEN);
1322 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1323 }
46900298 1324
62ae67be 1325 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1326
a619a4c0
JO
1327 return skb;
1328}
1329
1330void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1331 const u8 *ssid, size_t ssid_len,
a806c558 1332 const u8 *ie, size_t ie_len,
1672c0e3 1333 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1334 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO
1335{
1336 struct sk_buff *skb;
1337
fe94fe05 1338 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
6b77863b 1339 ssid, ssid_len,
85a237fe 1340 ie, ie_len, directed);
aad14ceb 1341 if (skb) {
1672c0e3 1342 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB
1343 if (scan)
1344 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1345 else
1346 ieee80211_tx_skb(sdata, skb);
aad14ceb 1347 }
46900298
JB
1348}
1349
1350u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1351 struct ieee802_11_elems *elems,
9ebb61a2 1352 enum ieee80211_band band, u32 *basic_rates)
46900298
JB
1353{
1354 struct ieee80211_supported_band *sband;
1355 struct ieee80211_rate *bitrates;
1356 size_t num_rates;
1357 u32 supp_rates;
1358 int i, j;
1359 sband = local->hw.wiphy->bands[band];
1360
4ee73f33
MK
1361 if (WARN_ON(!sband))
1362 return 1;
46900298
JB
1363
1364 bitrates = sband->bitrates;
1365 num_rates = sband->n_bitrates;
1366 supp_rates = 0;
1367 for (i = 0; i < elems->supp_rates_len +
1368 elems->ext_supp_rates_len; i++) {
1369 u8 rate = 0;
1370 int own_rate;
9ebb61a2 1371 bool is_basic;
46900298
JB
1372 if (i < elems->supp_rates_len)
1373 rate = elems->supp_rates[i];
1374 else if (elems->ext_supp_rates)
1375 rate = elems->ext_supp_rates
1376 [i - elems->supp_rates_len];
1377 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN
1378 is_basic = !!(rate & 0x80);
1379
1380 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1381 continue;
1382
1383 for (j = 0; j < num_rates; j++) {
1384 if (bitrates[j].bitrate == own_rate) {
46900298 1385 supp_rates |= BIT(j);
9ebb61a2
AN
1386 if (basic_rates && is_basic)
1387 *basic_rates |= BIT(j);
1388 }
1389 }
46900298
JB
1390 }
1391 return supp_rates;
1392}
f2753ddb 1393
84f6a01c
JB
1394void ieee80211_stop_device(struct ieee80211_local *local)
1395{
1396 ieee80211_led_radio(local, false);
67408c8c 1397 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB
1398
1399 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB
1400
1401 flush_workqueue(local->workqueue);
678f415f 1402 drv_stop(local);
84f6a01c
JB
1403}
1404
153a5fc4
SG
1405static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1406 struct ieee80211_sub_if_data *sdata)
1407{
1408 struct ieee80211_chanctx_conf *conf;
1409 struct ieee80211_chanctx *ctx;
1410
1411 if (!local->use_chanctx)
1412 return;
1413
1414 mutex_lock(&local->chanctx_mtx);
1415 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1416 lockdep_is_held(&local->chanctx_mtx));
1417 if (conf) {
1418 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1419 drv_assign_vif_chanctx(local, sdata, ctx);
1420 }
1421 mutex_unlock(&local->chanctx_mtx);
1422}
1423
f2753ddb
JB
1424int ieee80211_reconfig(struct ieee80211_local *local)
1425{
1426 struct ieee80211_hw *hw = &local->hw;
1427 struct ieee80211_sub_if_data *sdata;
55de908a 1428 struct ieee80211_chanctx *ctx;
f2753ddb 1429 struct sta_info *sta;
2683d65b 1430 int res, i;
d888130a
JB
1431 bool reconfig_due_to_wowlan = false;
1432
8f21b0ad 1433#ifdef CONFIG_PM
ceb99fe0
JB
1434 if (local->suspended)
1435 local->resuming = true;
f2753ddb 1436
eecc4800
JB
1437 if (local->wowlan) {
1438 local->wowlan = false;
1439 res = drv_resume(local);
1440 if (res < 0) {
1441 local->resuming = false;
1442 return res;
1443 }
1444 if (res == 0)
1445 goto wake_up;
1446 WARN_ON(res > 1);
1447 /*
1448 * res is 1, which means the driver requested
1449 * to go through a regular reset on wakeup.
1450 */
d888130a 1451 reconfig_due_to_wowlan = true;
eecc4800
JB
1452 }
1453#endif
94f9b97b
JB
1454 /* everything else happens only if HW was up & running */
1455 if (!local->open_count)
1456 goto wake_up;
f2753ddb 1457
94f9b97b
JB
1458 /*
1459 * Upon resume hardware can sometimes be goofy due to
1460 * various platform / driver / bus issues, so restarting
1461 * the device may at times not work immediately. Propagate
1462 * the error.
1463 */
1464 res = drv_start(local);
1465 if (res) {
1466 WARN(local->suspended, "Hardware became unavailable "
1467 "upon resume. This could be a software issue "
1468 "prior to suspend or a hardware issue.\n");
1469 return res;
f2753ddb
JB
1470 }
1471
7f281975
YAP
1472 /* setup fragmentation threshold */
1473 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1474
1475 /* setup RTS threshold */
1476 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1477
1478 /* reset coverage class */
1479 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1480
94f9b97b
JB
1481 ieee80211_led_radio(local, true);
1482 ieee80211_mod_tpt_led_trig(local,
1483 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1484
f2753ddb 1485 /* add interfaces */
4b6f1dd6
JB
1486 sdata = rtnl_dereference(local->monitor_sdata);
1487 if (sdata) {
3c3e21e7
JB
1488 /* in HW restart it exists already */
1489 WARN_ON(local->resuming);
4b6f1dd6
JB
1490 res = drv_add_interface(local, sdata);
1491 if (WARN_ON(res)) {
1492 rcu_assign_pointer(local->monitor_sdata, NULL);
1493 synchronize_net();
1494 kfree(sdata);
1495 }
1496 }
1497
f2753ddb
JB
1498 list_for_each_entry(sdata, &local->interfaces, list) {
1499 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1500 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1501 ieee80211_sdata_running(sdata))
7b7eab6f 1502 res = drv_add_interface(local, sdata);
f2753ddb
JB
1503 }
1504
55de908a 1505 /* add channel contexts */
f0dea9c7
AS
1506 if (local->use_chanctx) {
1507 mutex_lock(&local->chanctx_mtx);
1508 list_for_each_entry(ctx, &local->chanctx_list, list)
1509 WARN_ON(drv_add_chanctx(local, ctx));
1510 mutex_unlock(&local->chanctx_mtx);
1511 }
55de908a 1512
6352c87f 1513 list_for_each_entry(sdata, &local->interfaces, list) {
6352c87f
JB
1514 if (!ieee80211_sdata_running(sdata))
1515 continue;
153a5fc4 1516 ieee80211_assign_chanctx(local, sdata);
6352c87f
JB
1517 }
1518
fe5f2559 1519 sdata = rtnl_dereference(local->monitor_sdata);
153a5fc4
SG
1520 if (sdata && ieee80211_sdata_running(sdata))
1521 ieee80211_assign_chanctx(local, sdata);
fe5f2559 1522
f2753ddb 1523 /* add STAs back */
34e89507
JB
1524 mutex_lock(&local->sta_mtx);
1525 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1526 enum ieee80211_sta_state state;
f09603a2 1527
2e8d397e
AN
1528 if (!sta->uploaded)
1529 continue;
1530
1531 /* AP-mode stations will be added later */
1532 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1533 continue;
1534
1535 for (state = IEEE80211_STA_NOTEXIST;
1536 state < sta->sta_state; state++)
1537 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1538 state + 1));
f2753ddb 1539 }
34e89507 1540 mutex_unlock(&local->sta_mtx);
f2753ddb 1541
2683d65b 1542 /* reconfigure tx conf */
54bcbc69
JB
1543 if (hw->queues >= IEEE80211_NUM_ACS) {
1544 list_for_each_entry(sdata, &local->interfaces, list) {
1545 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1546 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1547 !ieee80211_sdata_running(sdata))
1548 continue;
f6f3def3 1549
54bcbc69
JB
1550 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1551 drv_conf_tx(local, sdata, i,
1552 &sdata->tx_conf[i]);
1553 }
f6f3def3 1554 }
2683d65b 1555
f2753ddb
JB
1556 /* reconfigure hardware */
1557 ieee80211_hw_config(local, ~0);
1558
f2753ddb 1559 ieee80211_configure_filter(local);
f2753ddb
JB
1560
1561 /* Finally also reconfigure all the BSS information */
1562 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB
1563 u32 changed;
1564
9607e6b6 1565 if (!ieee80211_sdata_running(sdata))
f2753ddb 1566 continue;
ac8dd506
JB
1567
1568 /* common change flags for all interface types */
1569 changed = BSS_CHANGED_ERP_CTS_PROT |
1570 BSS_CHANGED_ERP_PREAMBLE |
1571 BSS_CHANGED_ERP_SLOT |
1572 BSS_CHANGED_HT |
1573 BSS_CHANGED_BASIC_RATES |
1574 BSS_CHANGED_BEACON_INT |
1575 BSS_CHANGED_BSSID |
4ced3f74 1576 BSS_CHANGED_CQM |
55de47f6 1577 BSS_CHANGED_QOS |
1ea6f9c0
JB
1578 BSS_CHANGED_IDLE |
1579 BSS_CHANGED_TXPOWER;
ac8dd506 1580
f2753ddb
JB
1581 switch (sdata->vif.type) {
1582 case NL80211_IFTYPE_STATION:
0d392e93 1583 changed |= BSS_CHANGED_ASSOC |
ab095877
EP
1584 BSS_CHANGED_ARP_FILTER |
1585 BSS_CHANGED_PS;
c65dd147
EG
1586
1587 if (sdata->u.mgd.dtim_period)
1588 changed |= BSS_CHANGED_DTIM_PERIOD;
1589
8d61ffa5 1590 sdata_lock(sdata);
ac8dd506 1591 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1592 sdata_unlock(sdata);
ac8dd506 1593 break;
f2753ddb 1594 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB
1595 changed |= BSS_CHANGED_IBSS;
1596 /* fall through */
f2753ddb 1597 case NL80211_IFTYPE_AP:
339afbf4 1598 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1599
1041638f 1600 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN
1601 changed |= BSS_CHANGED_AP_PROBE_RESP;
1602
1041638f
JB
1603 if (rcu_access_pointer(sdata->u.ap.beacon))
1604 drv_start_ap(local, sdata);
1605 }
1606
7827493b 1607 /* fall through */
f2753ddb 1608 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB
1609 if (sdata->vif.bss_conf.enable_beacon) {
1610 changed |= BSS_CHANGED_BEACON |
1611 BSS_CHANGED_BEACON_ENABLED;
1612 ieee80211_bss_info_change_notify(sdata, changed);
1613 }
f2753ddb
JB
1614 break;
1615 case NL80211_IFTYPE_WDS:
1616 break;
1617 case NL80211_IFTYPE_AP_VLAN:
1618 case NL80211_IFTYPE_MONITOR:
1619 /* ignore virtual */
1620 break;
98104fde 1621 case NL80211_IFTYPE_P2P_DEVICE:
f142c6b9
JB
1622 changed = BSS_CHANGED_IDLE;
1623 break;
f2753ddb 1624 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1625 case NUM_NL80211_IFTYPES:
2ca27bcf
JB
1626 case NL80211_IFTYPE_P2P_CLIENT:
1627 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB
1628 WARN_ON(1);
1629 break;
1630 }
1631 }
1632
8e1b23b9
ES
1633 ieee80211_recalc_ps(local, -1);
1634
6e1b1b24
EP
1635 /*
1636 * The sta might be in psm against the ap (e.g. because
1637 * this was the state before a hw restart), so we
1638 * explicitly send a null packet in order to make sure
1639 * it'll sync against the ap (and get out of psm).
1640 */
1641 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1642 list_for_each_entry(sdata, &local->interfaces, list) {
1643 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1644 continue;
20f544ee
JB
1645 if (!sdata->u.mgd.associated)
1646 continue;
6e1b1b24
EP
1647
1648 ieee80211_send_nullfunc(local, sdata, 0);
1649 }
1650 }
1651
2e8d397e
AN
1652 /* APs are now beaconing, add back stations */
1653 mutex_lock(&local->sta_mtx);
1654 list_for_each_entry(sta, &local->sta_list, list) {
1655 enum ieee80211_sta_state state;
1656
1657 if (!sta->uploaded)
1658 continue;
1659
1660 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1661 continue;
1662
1663 for (state = IEEE80211_STA_NOTEXIST;
1664 state < sta->sta_state; state++)
1665 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1666 state + 1));
1667 }
1668 mutex_unlock(&local->sta_mtx);
1669
7b21aea0
ES
1670 /* add back keys */
1671 list_for_each_entry(sdata, &local->interfaces, list)
1672 if (ieee80211_sdata_running(sdata))
1673 ieee80211_enable_keys(sdata);
1674
c6209488 1675 wake_up:
04800ada
AN
1676 local->in_reconfig = false;
1677 barrier();
1678
3c3e21e7
JB
1679 if (local->monitors == local->open_count && local->monitors > 0)
1680 ieee80211_add_virtual_monitor(local);
1681
2a419056
JB
1682 /*
1683 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1684 * sessions can be established after a resume.
1685 *
1686 * Also tear down aggregation sessions since reconfiguring
1687 * them in a hardware restart scenario is not easily done
1688 * right now, and the hardware will have lost information
1689 * about the sessions, but we and the AP still think they
1690 * are active. This is really a workaround though.
1691 */
74e2bd1f 1692 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB
1693 mutex_lock(&local->sta_mtx);
1694
1695 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB
1696 ieee80211_sta_tear_down_BA_sessions(
1697 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 1698 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 1699 }
2a419056
JB
1700
1701 mutex_unlock(&local->sta_mtx);
74e2bd1f 1702 }
74e2bd1f 1703
445ea4e8
JB
1704 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1705 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
f2753ddb 1706
5bb644a0
JB
1707 /*
1708 * If this is for hw restart things are still running.
1709 * We may want to change that later, however.
1710 */
8f21b0ad 1711 if (!local->suspended || reconfig_due_to_wowlan)
9214ad7f 1712 drv_restart_complete(local);
8f21b0ad
JB
1713
1714 if (!local->suspended)
5bb644a0
JB
1715 return 0;
1716
1717#ifdef CONFIG_PM
ceb99fe0 1718 /* first set suspended false, then resuming */
5bb644a0 1719 local->suspended = false;
ceb99fe0
JB
1720 mb();
1721 local->resuming = false;
5bb644a0 1722
b8360ab8
JB
1723 list_for_each_entry(sdata, &local->interfaces, list) {
1724 if (!ieee80211_sdata_running(sdata))
1725 continue;
1726 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1727 ieee80211_sta_restart(sdata);
1728 }
1729
26d59535 1730 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB
1731#else
1732 WARN_ON(1);
1733#endif
f2753ddb
JB
1734 return 0;
1735}
42935eca 1736
95acac61
JB
1737void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1738{
1739 struct ieee80211_sub_if_data *sdata;
1740 struct ieee80211_local *local;
1741 struct ieee80211_key *key;
1742
1743 if (WARN_ON(!vif))
1744 return;
1745
1746 sdata = vif_to_sdata(vif);
1747 local = sdata->local;
1748
1749 if (WARN_ON(!local->resuming))
1750 return;
1751
1752 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1753 return;
1754
1755 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1756
1757 mutex_lock(&local->key_mtx);
1758 list_for_each_entry(key, &sdata->key_list, list)
1759 key->flags |= KEY_FLAG_TAINTED;
1760 mutex_unlock(&local->key_mtx);
1761}
1762EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1763
04ecd257 1764void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 1765{
04ecd257
JB
1766 struct ieee80211_local *local = sdata->local;
1767 struct ieee80211_chanctx_conf *chanctx_conf;
1768 struct ieee80211_chanctx *chanctx;
025e6be2 1769
04ecd257 1770 mutex_lock(&local->chanctx_mtx);
0f78231b 1771
04ecd257
JB
1772 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1773 lockdep_is_held(&local->chanctx_mtx));
0f78231b 1774
04ecd257 1775 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 1776 goto unlock;
0f78231b 1777
04ecd257
JB
1778 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1779 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 1780 unlock:
04ecd257 1781 mutex_unlock(&local->chanctx_mtx);
0f78231b 1782}
8e664fb3
JB
1783
1784static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1785{
1786 int i;
1787
1788 for (i = 0; i < n_ids; i++)
1789 if (ids[i] == id)
1790 return true;
1791 return false;
1792}
1793
1794/**
1795 * ieee80211_ie_split - split an IE buffer according to ordering
1796 *
1797 * @ies: the IE buffer
1798 * @ielen: the length of the IE buffer
1799 * @ids: an array with element IDs that are allowed before
1800 * the split
1801 * @n_ids: the size of the element ID array
1802 * @offset: offset where to start splitting in the buffer
1803 *
1804 * This function splits an IE buffer by updating the @offset
1805 * variable to point to the location where the buffer should be
1806 * split.
1807 *
1808 * It assumes that the given IE buffer is well-formed, this
1809 * has to be guaranteed by the caller!
1810 *
1811 * It also assumes that the IEs in the buffer are ordered
1812 * correctly, if not the result of using this function will not
1813 * be ordered correctly either, i.e. it does no reordering.
1814 *
1815 * The function returns the offset where the next part of the
1816 * buffer starts, which may be @ielen if the entire (remainder)
1817 * of the buffer should be used.
1818 */
1819size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1820 const u8 *ids, int n_ids, size_t offset)
1821{
1822 size_t pos = offset;
1823
1824 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1825 pos += 2 + ies[pos + 1];
1826
1827 return pos;
1828}
1829
1830size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1831{
1832 size_t pos = offset;
1833
1834 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1835 pos += 2 + ies[pos + 1];
1836
1837 return pos;
1838}
615f7b9b
MV
1839
1840static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1841 int rssi_min_thold,
1842 int rssi_max_thold)
1843{
1844 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1845
1846 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1847 return;
1848
1849 /*
1850 * Scale up threshold values before storing it, as the RSSI averaging
1851 * algorithm uses a scaled up value as well. Change this scaling
1852 * factor if the RSSI averaging algorithm changes.
1853 */
1854 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1855 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1856}
1857
1858void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1859 int rssi_min_thold,
1860 int rssi_max_thold)
1861{
1862 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1863
1864 WARN_ON(rssi_min_thold == rssi_max_thold ||
1865 rssi_min_thold > rssi_max_thold);
1866
1867 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1868 rssi_max_thold);
1869}
1870EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1871
1872void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1873{
1874 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1875
1876 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1877}
1878EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 1879
ef96a842 1880u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS
1881 u16 cap)
1882{
1883 __le16 tmp;
1884
1885 *pos++ = WLAN_EID_HT_CAPABILITY;
1886 *pos++ = sizeof(struct ieee80211_ht_cap);
1887 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1888
1889 /* capability flags */
1890 tmp = cpu_to_le16(cap);
1891 memcpy(pos, &tmp, sizeof(u16));
1892 pos += sizeof(u16);
1893
1894 /* AMPDU parameters */
ef96a842
BG
1895 *pos++ = ht_cap->ampdu_factor |
1896 (ht_cap->ampdu_density <<
42e7aa77
AS
1897 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1898
1899 /* MCS set */
ef96a842
BG
1900 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1901 pos += sizeof(ht_cap->mcs);
42e7aa77
AS
1902
1903 /* extended capabilities */
1904 pos += sizeof(__le16);
1905
1906 /* BF capabilities */
1907 pos += sizeof(__le32);
1908
1909 /* antenna selection */
1910 pos += sizeof(u8);
1911
1912 return pos;
1913}
1914
ba0afa2f 1915u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 1916 u32 cap)
ba0afa2f
MP
1917{
1918 __le32 tmp;
1919
1920 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP
1921 *pos++ = sizeof(struct ieee80211_vht_cap);
1922 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP
1923
1924 /* capability flags */
1925 tmp = cpu_to_le32(cap);
1926 memcpy(pos, &tmp, sizeof(u32));
1927 pos += sizeof(u32);
1928
1929 /* VHT MCS set */
1930 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1931 pos += sizeof(vht_cap->vht_mcs);
1932
1933 return pos;
1934}
1935
074d46d1 1936u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 1937 const struct cfg80211_chan_def *chandef,
431e3154 1938 u16 prot_mode)
42e7aa77 1939{
074d46d1 1940 struct ieee80211_ht_operation *ht_oper;
42e7aa77 1941 /* Build HT Information */
074d46d1
JB
1942 *pos++ = WLAN_EID_HT_OPERATION;
1943 *pos++ = sizeof(struct ieee80211_ht_operation);
1944 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB
1945 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1946 chandef->chan->center_freq);
1947 switch (chandef->width) {
1948 case NL80211_CHAN_WIDTH_160:
1949 case NL80211_CHAN_WIDTH_80P80:
1950 case NL80211_CHAN_WIDTH_80:
1951 case NL80211_CHAN_WIDTH_40:
1952 if (chandef->center_freq1 > chandef->chan->center_freq)
1953 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1954 else
1955 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 1956 break;
42e7aa77 1957 default:
074d46d1 1958 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS
1959 break;
1960 }
aee286c2 1961 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB
1962 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1963 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 1964 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 1965
431e3154 1966 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 1967 ht_oper->stbc_param = 0x0000;
42e7aa77
AS
1968
1969 /* It seems that Basic MCS set and Supported MCS set
1970 are identical for the first 10 bytes */
074d46d1
JB
1971 memset(&ht_oper->basic_set, 0, 16);
1972 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 1973
074d46d1 1974 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS
1975}
1976
4bf88530 1977void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 1978 const struct ieee80211_ht_operation *ht_oper,
4bf88530 1979 struct cfg80211_chan_def *chandef)
42e7aa77
AS
1980{
1981 enum nl80211_channel_type channel_type;
1982
4bf88530
JB
1983 if (!ht_oper) {
1984 cfg80211_chandef_create(chandef, control_chan,
1985 NL80211_CHAN_NO_HT);
1986 return;
1987 }
42e7aa77 1988
074d46d1 1989 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS
1990 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1991 channel_type = NL80211_CHAN_HT20;
1992 break;
1993 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1994 channel_type = NL80211_CHAN_HT40PLUS;
1995 break;
1996 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1997 channel_type = NL80211_CHAN_HT40MINUS;
1998 break;
1999 default:
2000 channel_type = NL80211_CHAN_NO_HT;
2001 }
2002
4bf88530 2003 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS
2004}
2005
fc8a7321 2006int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB
2007 struct sk_buff *skb, bool need_basic,
2008 enum ieee80211_band band)
768db343 2009{
768db343
AN
2010 struct ieee80211_local *local = sdata->local;
2011 struct ieee80211_supported_band *sband;
2012 int rate;
2013 u8 i, rates, *pos;
fc8a7321 2014 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
768db343 2015
6b77863b 2016 sband = local->hw.wiphy->bands[band];
768db343
AN
2017 rates = sband->n_bitrates;
2018 if (rates > 8)
2019 rates = 8;
2020
2021 if (skb_tailroom(skb) < rates + 2)
2022 return -ENOMEM;
2023
2024 pos = skb_put(skb, rates + 2);
2025 *pos++ = WLAN_EID_SUPP_RATES;
2026 *pos++ = rates;
2027 for (i = 0; i < rates; i++) {
657c3e0c
AN
2028 u8 basic = 0;
2029 if (need_basic && basic_rates & BIT(i))
2030 basic = 0x80;
768db343 2031 rate = sband->bitrates[i].bitrate;
657c3e0c 2032 *pos++ = basic | (u8) (rate / 5);
768db343
AN
2033 }
2034
2035 return 0;
2036}
2037
fc8a7321 2038int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB
2039 struct sk_buff *skb, bool need_basic,
2040 enum ieee80211_band band)
768db343 2041{
768db343
AN
2042 struct ieee80211_local *local = sdata->local;
2043 struct ieee80211_supported_band *sband;
2044 int rate;
2045 u8 i, exrates, *pos;
fc8a7321 2046 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
768db343 2047
6b77863b 2048 sband = local->hw.wiphy->bands[band];
768db343
AN
2049 exrates = sband->n_bitrates;
2050 if (exrates > 8)
2051 exrates -= 8;
2052 else
2053 exrates = 0;
2054
2055 if (skb_tailroom(skb) < exrates + 2)
2056 return -ENOMEM;
2057
2058 if (exrates) {
2059 pos = skb_put(skb, exrates + 2);
2060 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2061 *pos++ = exrates;
2062 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c
AN
2063 u8 basic = 0;
2064 if (need_basic && basic_rates & BIT(i))
2065 basic = 0x80;
768db343 2066 rate = sband->bitrates[i].bitrate;
657c3e0c 2067 *pos++ = basic | (u8) (rate / 5);
768db343
AN
2068 }
2069 }
2070 return 0;
2071}
1dae27f8
WYG
2072
2073int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2074{
2075 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2076 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2077
be6bcabc
WYG
2078 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2079 /* non-managed type inferfaces */
2080 return 0;
2081 }
3a7bba64 2082 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2083}
0d8a0a17 2084EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB
2085
2086u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2087{
2088 if (!mcs)
2089 return 1;
2090
2091 /* TODO: consider rx_highest */
2092
2093 if (mcs->rx_mask[3])
2094 return 4;
2095 if (mcs->rx_mask[2])
2096 return 3;
2097 if (mcs->rx_mask[1])
2098 return 2;
2099 return 1;
2100}
f4bda337
TP
2101
2102/**
2103 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2104 * @local: mac80211 hw info struct
2105 * @status: RX status
2106 * @mpdu_len: total MPDU length (including FCS)
2107 * @mpdu_offset: offset into MPDU to calculate timestamp at
2108 *
2109 * This function calculates the RX timestamp at the given MPDU offset, taking
2110 * into account what the RX timestamp was. An offset of 0 will just normalize
2111 * the timestamp to TSF at beginning of MPDU reception.
2112 */
2113u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2114 struct ieee80211_rx_status *status,
2115 unsigned int mpdu_len,
2116 unsigned int mpdu_offset)
2117{
2118 u64 ts = status->mactime;
2119 struct rate_info ri;
2120 u16 rate;
2121
2122 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2123 return 0;
2124
2125 memset(&ri, 0, sizeof(ri));
2126
2127 /* Fill cfg80211 rate info */
2128 if (status->flag & RX_FLAG_HT) {
2129 ri.mcs = status->rate_idx;
2130 ri.flags |= RATE_INFO_FLAGS_MCS;
2131 if (status->flag & RX_FLAG_40MHZ)
2132 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2133 if (status->flag & RX_FLAG_SHORT_GI)
2134 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB
2135 } else if (status->flag & RX_FLAG_VHT) {
2136 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2137 ri.mcs = status->rate_idx;
2138 ri.nss = status->vht_nss;
2139 if (status->flag & RX_FLAG_40MHZ)
2140 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2141 if (status->flag & RX_FLAG_80MHZ)
2142 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2143 if (status->flag & RX_FLAG_80P80MHZ)
2144 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2145 if (status->flag & RX_FLAG_160MHZ)
2146 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2147 if (status->flag & RX_FLAG_SHORT_GI)
2148 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP
2149 } else {
2150 struct ieee80211_supported_band *sband;
2151
2152 sband = local->hw.wiphy->bands[status->band];
2153 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2154 }
2155
2156 rate = cfg80211_calculate_bitrate(&ri);
2157
2158 /* rewind from end of MPDU */
2159 if (status->flag & RX_FLAG_MACTIME_END)
2160 ts -= mpdu_len * 8 * 10 / rate;
2161
2162 ts += mpdu_offset * 8 * 10 / rate;
2163
2164 return ts;
2165}
164eb02d
SW
2166
2167void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2168{
2169 struct ieee80211_sub_if_data *sdata;
2170
2171 mutex_lock(&local->iflist_mtx);
2172 list_for_each_entry(sdata, &local->interfaces, list) {
2173 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2174
2175 if (sdata->wdev.cac_started) {
2176 ieee80211_vif_release_channel(sdata);
2177 cfg80211_cac_event(sdata->dev,
2178 NL80211_RADAR_CAC_ABORTED,
2179 GFP_KERNEL);
2180 }
2181 }
2182 mutex_unlock(&local->iflist_mtx);
2183}
2184
2185void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2186{
2187 struct ieee80211_local *local =
2188 container_of(work, struct ieee80211_local, radar_detected_work);
2189 struct cfg80211_chan_def chandef;
2190
2191 ieee80211_dfs_cac_cancel(local);
2192
2193 if (local->use_chanctx)
2194 /* currently not handled */
2195 WARN_ON(1);
2196 else {
675a0b04 2197 chandef = local->hw.conf.chandef;
164eb02d
SW
2198 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2199 }
2200}
2201
2202void ieee80211_radar_detected(struct ieee80211_hw *hw)
2203{
2204 struct ieee80211_local *local = hw_to_local(hw);
2205
2206 trace_api_radar_detected(local);
2207
2208 ieee80211_queue_work(hw, &local->radar_detected_work);
2209}
2210EXPORT_SYMBOL(ieee80211_radar_detected);
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