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[mirror_ubuntu-artful-kernel.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,
438b61b7
SW		 110 int rate, int erp, int short_preamble,
111 int shift)
c2d1560a
JB		 112{
113 int dur;
114
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
118 * also include SIFS.
119 *
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
438b61b7
SW		 122 *
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
c2d1560a
JB		 125 */
126
4ee73f33 127 if (band == IEEE80211_BAND_5GHZ || erp) {
c2d1560a
JB		 128 /*
129 * OFDM:
130 *
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
135 *
136 * T_SYM = 4 usec
438b61b7 137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
c2d1560a
JB		 138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
140 */
c2d1560a 141 dur = 16; /* SIFS + signal ext */
438b61b7
SW		 142 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
438b61b7
SW		 144
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
148 */
149 dur *= 1 << shift;
2103dec1
SW		 150
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
153 */
154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
155 4 * rate); /* T_SYM x N_SYM */
c2d1560a
JB		 156 } else {
157 /*
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
161 *
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
166 */
167 dur = 10; /* aSIFSTime = 10 usec */
168 dur += short_preamble ? (72 + 24) : (144 + 48);
169
170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
171 }
172
173 return dur;
174}
175
176/* Exported duration function for driver use */
32bfd35d
JB		 177__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
178 struct ieee80211_vif *vif,
4ee73f33 179 enum ieee80211_band band,
8318d78a
JB		 180 size_t frame_len,
181 struct ieee80211_rate *rate)
c2d1560a 182{
25d834e1 183 struct ieee80211_sub_if_data *sdata;
c2d1560a 184 u16 dur;
438b61b7 185 int erp, shift = 0;
25d834e1 186 bool short_preamble = false;
c2d1560a 187
8318d78a 188 erp = 0;
25d834e1
JB		 189 if (vif) {
190 sdata = vif_to_sdata(vif);
bda3933a 191 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 192 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
193 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 194 shift = ieee80211_vif_get_shift(vif);
25d834e1 195 }
8318d78a 196
4ee73f33 197 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
438b61b7 198 short_preamble, shift);
c2d1560a
JB		 199
200 return cpu_to_le16(dur);
201}
202EXPORT_SYMBOL(ieee80211_generic_frame_duration);
203
32bfd35d
JB		 204__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif, size_t frame_len,
e039fa4a 206 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 207{
208 struct ieee80211_local *local = hw_to_local(hw);
209 struct ieee80211_rate *rate;
25d834e1 210 struct ieee80211_sub_if_data *sdata;
471b3efd 211 bool short_preamble;
2103dec1 212 int erp, shift = 0, bitrate;
c2d1560a 213 u16 dur;
2e92e6f2
JB		 214 struct ieee80211_supported_band *sband;
215
4ee73f33 216 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 217
25d834e1 218 short_preamble = false;
7e9ed188 219
e039fa4a 220 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a
JB		 221
222 erp = 0;
25d834e1
JB		 223 if (vif) {
224 sdata = vif_to_sdata(vif);
bda3933a 225 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 226 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
227 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 228 shift = ieee80211_vif_get_shift(vif);
25d834e1 229 }
c2d1560a 230
2103dec1
SW		 231 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
232
c2d1560a 233 /* CTS duration */
2103dec1 234 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 235 erp, short_preamble, shift);
c2d1560a 236 /* Data frame duration */
2103dec1 237 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 238 erp, short_preamble, shift);
c2d1560a 239 /* ACK duration */
2103dec1 240 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 241 erp, short_preamble, shift);
c2d1560a
JB		 242
243 return cpu_to_le16(dur);
244}
245EXPORT_SYMBOL(ieee80211_rts_duration);
246
32bfd35d
JB		 247__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
248 struct ieee80211_vif *vif,
c2d1560a 249 size_t frame_len,
e039fa4a 250 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 251{
252 struct ieee80211_local *local = hw_to_local(hw);
253 struct ieee80211_rate *rate;
25d834e1 254 struct ieee80211_sub_if_data *sdata;
471b3efd 255 bool short_preamble;
2103dec1 256 int erp, shift = 0, bitrate;
c2d1560a 257 u16 dur;
2e92e6f2
JB		 258 struct ieee80211_supported_band *sband;
259
4ee73f33 260 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 261
25d834e1 262 short_preamble = false;
7e9ed188 263
e039fa4a 264 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a 265 erp = 0;
25d834e1
JB		 266 if (vif) {
267 sdata = vif_to_sdata(vif);
bda3933a 268 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 269 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
270 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 271 shift = ieee80211_vif_get_shift(vif);
25d834e1 272 }
c2d1560a 273
2103dec1
SW		 274 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
275
c2d1560a 276 /* Data frame duration */
2103dec1 277 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 278 erp, short_preamble, shift);
e039fa4a 279 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
c2d1560a 280 /* ACK duration */
2103dec1 281 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 282 erp, short_preamble, shift);
c2d1560a
JB		 283 }
284
285 return cpu_to_le16(dur);
286}
287EXPORT_SYMBOL(ieee80211_ctstoself_duration);
288
3a25a8c8
JB		 289void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
290{
291 struct ieee80211_sub_if_data *sdata;
a6f38ac3
JB		 292 int n_acs = IEEE80211_NUM_ACS;
293
294 if (local->hw.queues < IEEE80211_NUM_ACS)
295 n_acs = 1;
3a25a8c8
JB		 296
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
298 int ac;
299
f142c6b9
JB		 300 if (!sdata->dev)
301 continue;
302
3a25a8c8
JB		 303 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
304 continue;
305
306 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
307 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
308 continue;
309
a6f38ac3 310 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 311 int ac_queue = sdata->vif.hw_queue[ac];
312
313 if (ac_queue == queue ||
314 (sdata->vif.cab_queue == queue &&
315 local->queue_stop_reasons[ac_queue] == 0 &&
316 skb_queue_empty(&local->pending[ac_queue])))
317 netif_wake_subqueue(sdata->dev, ac);
318 }
319 }
320}
321
ce7c9111
KV		 322static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
323 enum queue_stop_reason reason)
c2d1560a
JB		 324{
325 struct ieee80211_local *local = hw_to_local(hw);
326
b5878a2d
JB		 327 trace_wake_queue(local, queue, reason);
328
e4e72fb4
JB		 329 if (WARN_ON(queue >= hw->queues))
330 return;
ce7c9111 331
ada15125
JB		 332 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
333 return;
334
96f5e66e
JB		 335 __clear_bit(reason, &local->queue_stop_reasons[queue]);
336
337 if (local->queue_stop_reasons[queue] != 0)
338 /* someone still has this queue stopped */
339 return;
340
7236fe29
JB		 341 if (skb_queue_empty(&local->pending[queue])) {
342 rcu_read_lock();
3a25a8c8 343 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 344 rcu_read_unlock();
345 } else
3b8d81e0 346 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 347}
ce7c9111 348
96f5e66e
JB		 349void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
350 enum queue_stop_reason reason)
ce7c9111
KV		 351{
352 struct ieee80211_local *local = hw_to_local(hw);
353 unsigned long flags;
354
355 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
356 __ieee80211_wake_queue(hw, queue, reason);
357 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
358}
359
360void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
361{
362 ieee80211_wake_queue_by_reason(hw, queue,
363 IEEE80211_QUEUE_STOP_REASON_DRIVER);
364}
c2d1560a
JB		 365EXPORT_SYMBOL(ieee80211_wake_queue);
366
ce7c9111
KV		 367static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
368 enum queue_stop_reason reason)
c2d1560a
JB		 369{
370 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 371 struct ieee80211_sub_if_data *sdata;
a6f38ac3 372 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 373
b5878a2d
JB		 374 trace_stop_queue(local, queue, reason);
375
e4e72fb4
JB		 376 if (WARN_ON(queue >= hw->queues))
377 return;
96f5e66e 378
ada15125
JB		 379 if (test_bit(reason, &local->queue_stop_reasons[queue]))
380 return;
381
2a577d98 382 __set_bit(reason, &local->queue_stop_reasons[queue]);
cf0277e7 383
a6f38ac3
JB		 384 if (local->hw.queues < IEEE80211_NUM_ACS)
385 n_acs = 1;
386
cf0277e7 387 rcu_read_lock();
3a25a8c8
JB		 388 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
389 int ac;
390
f142c6b9
JB		 391 if (!sdata->dev)
392 continue;
393
a6f38ac3 394 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 395 if (sdata->vif.hw_queue[ac] == queue ||
396 sdata->vif.cab_queue == queue)
397 netif_stop_subqueue(sdata->dev, ac);
398 }
399 }
cf0277e7 400 rcu_read_unlock();
c2d1560a 401}
ce7c9111 402
96f5e66e
JB		 403void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
404 enum queue_stop_reason reason)
ce7c9111
KV		 405{
406 struct ieee80211_local *local = hw_to_local(hw);
407 unsigned long flags;
408
409 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
410 __ieee80211_stop_queue(hw, queue, reason);
411 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
412}
413
414void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
415{
416 ieee80211_stop_queue_by_reason(hw, queue,
417 IEEE80211_QUEUE_STOP_REASON_DRIVER);
418}
c2d1560a
JB		 419EXPORT_SYMBOL(ieee80211_stop_queue);
420
8f77f384
JB		 421void ieee80211_add_pending_skb(struct ieee80211_local *local,
422 struct sk_buff *skb)
423{
424 struct ieee80211_hw *hw = &local->hw;
425 unsigned long flags;
a7bc376c 426 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 427 int queue = info->hw_queue;
a7bc376c
JB		 428
429 if (WARN_ON(!info->control.vif)) {
d4fa14cd 430 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 431 return;
432 }
8f77f384
JB		 433
434 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
435 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
3b8d81e0 436 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 437 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
438 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
439}
440
b0b97a8a
JB		 441void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
442 struct sk_buff_head *skbs,
443 void (*fn)(void *data), void *data)
8f77f384
JB		 444{
445 struct ieee80211_hw *hw = &local->hw;
446 struct sk_buff *skb;
447 unsigned long flags;
b0b97a8a 448 int queue, i;
8f77f384
JB		 449
450 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 451 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 452 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
453
454 if (WARN_ON(!info->control.vif)) {
d4fa14cd 455 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 456 continue;
457 }
458
3a25a8c8 459 queue = info->hw_queue;
4644ae89
JB		 460
461 __ieee80211_stop_queue(hw, queue,
462 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
463
3b8d81e0 464 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 465 }
466
50a9432d
JB		 467 if (fn)
468 fn(data);
469
3b8d81e0 470 for (i = 0; i < hw->queues; i++)
8f77f384
JB		 471 __ieee80211_wake_queue(hw, i,
472 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
8f77f384 473 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 474}
475
ce7c9111 476void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8
JB		 477 unsigned long queues,
478 enum queue_stop_reason reason)
c2d1560a 479{
ce7c9111
KV		 480 struct ieee80211_local *local = hw_to_local(hw);
481 unsigned long flags;
c2d1560a
JB		 482 int i;
483
ce7c9111
KV		 484 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
485
445ea4e8 486 for_each_set_bit(i, &queues, hw->queues)
ce7c9111
KV		 487 __ieee80211_stop_queue(hw, i, reason);
488
489 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
490}
491
492void ieee80211_stop_queues(struct ieee80211_hw *hw)
493{
445ea4e8 494 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
ce7c9111 495 IEEE80211_QUEUE_STOP_REASON_DRIVER);
c2d1560a
JB		 496}
497EXPORT_SYMBOL(ieee80211_stop_queues);
498
92ab8535
TW		 499int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
500{
501 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 502 unsigned long flags;
503 int ret;
96f5e66e 504
e4e72fb4
JB		 505 if (WARN_ON(queue >= hw->queues))
506 return true;
96f5e66e 507
3b8d81e0 508 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 509 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 511 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
512 return ret;
92ab8535
TW		 513}
514EXPORT_SYMBOL(ieee80211_queue_stopped);
515
ce7c9111 516void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 517 unsigned long queues,
ce7c9111 518 enum queue_stop_reason reason)
c2d1560a 519{
ce7c9111
KV		 520 struct ieee80211_local *local = hw_to_local(hw);
521 unsigned long flags;
c2d1560a
JB		 522 int i;
523
ce7c9111
KV		 524 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
525
445ea4e8 526 for_each_set_bit(i, &queues, hw->queues)
ce7c9111
KV		 527 __ieee80211_wake_queue(hw, i, reason);
528
529 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
530}
531
532void ieee80211_wake_queues(struct ieee80211_hw *hw)
533{
445ea4e8
JB		 534 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
535 IEEE80211_QUEUE_STOP_REASON_DRIVER);
c2d1560a
JB		 536}
537EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 538
39ecc01d
JB		 539void ieee80211_flush_queues(struct ieee80211_local *local,
540 struct ieee80211_sub_if_data *sdata)
541{
542 u32 queues;
543
544 if (!local->ops->flush)
545 return;
546
547 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
548 int ac;
549
550 queues = 0;
551
552 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
553 queues |= BIT(sdata->vif.hw_queue[ac]);
554 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
555 queues |= BIT(sdata->vif.cab_queue);
556 } else {
557 /* all queues */
558 queues = BIT(local->hw.queues) - 1;
559 }
560
445ea4e8
JB		 561 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
562 IEEE80211_QUEUE_STOP_REASON_FLUSH);
563
39ecc01d 564 drv_flush(local, queues, false);
445ea4e8
JB		 565
566 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
567 IEEE80211_QUEUE_STOP_REASON_FLUSH);
39ecc01d
JB		 568}
569
32bfd35d 570void ieee80211_iterate_active_interfaces(
8b2c9824 571 struct ieee80211_hw *hw, u32 iter_flags,
32bfd35d
JB		 572 void (*iterator)(void *data, u8 *mac,
573 struct ieee80211_vif *vif),
574 void *data)
dabeb344
JB		 575{
576 struct ieee80211_local *local = hw_to_local(hw);
577 struct ieee80211_sub_if_data *sdata;
578
c771c9d8 579 mutex_lock(&local->iflist_mtx);
2f561feb
ID		 580
581 list_for_each_entry(sdata, &local->interfaces, list) {
582 switch (sdata->vif.type) {
05c914fe 583 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 584 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
585 continue;
586 break;
05c914fe 587 case NL80211_IFTYPE_AP_VLAN:
2f561feb 588 continue;
2ca27bcf 589 default:
2f561feb
ID		 590 break;
591 }
8b2c9824
JB		 592 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
593 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
594 continue;
9607e6b6 595 if (ieee80211_sdata_running(sdata))
47846c9b 596 iterator(data, sdata->vif.addr,
2f561feb
ID		 597 &sdata->vif);
598 }
599
685fb72b
JB		 600 sdata = rcu_dereference_protected(local->monitor_sdata,
601 lockdep_is_held(&local->iflist_mtx));
8b2c9824
JB		 602 if (sdata &&
603 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
604 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b
JB		 605 iterator(data, sdata->vif.addr, &sdata->vif);
606
c771c9d8 607 mutex_unlock(&local->iflist_mtx);
2f561feb
ID		 608}
609EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
610
611void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 612 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 613 void (*iterator)(void *data, u8 *mac,
614 struct ieee80211_vif *vif),
615 void *data)
616{
617 struct ieee80211_local *local = hw_to_local(hw);
618 struct ieee80211_sub_if_data *sdata;
619
e38bad47 620 rcu_read_lock();
dabeb344 621
e38bad47 622 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
51fb61e7 623 switch (sdata->vif.type) {
05c914fe 624 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 625 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
626 continue;
627 break;
05c914fe 628 case NL80211_IFTYPE_AP_VLAN:
dabeb344 629 continue;
2ca27bcf 630 default:
dabeb344
JB		 631 break;
632 }
8b2c9824
JB		 633 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
634 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
635 continue;
9607e6b6 636 if (ieee80211_sdata_running(sdata))
47846c9b 637 iterator(data, sdata->vif.addr,
32bfd35d 638 &sdata->vif);
dabeb344 639 }
e38bad47 640
685fb72b 641 sdata = rcu_dereference(local->monitor_sdata);
8b2c9824
JB		 642 if (sdata &&
643 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
644 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b
JB		 645 iterator(data, sdata->vif.addr, &sdata->vif);
646
e38bad47 647 rcu_read_unlock();
dabeb344 648}
2f561feb 649EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
37ffc8da 650
42935eca
LR		 651/*
652 * Nothing should have been stuffed into the workqueue during
653 * the suspend->resume cycle. If this WARN is seen then there
654 * is a bug with either the driver suspend or something in
655 * mac80211 stuffing into the workqueue which we haven't yet
656 * cleared during mac80211's suspend cycle.
657 */
658static bool ieee80211_can_queue_work(struct ieee80211_local *local)
659{
ceb99fe0
JB		 660 if (WARN(local->suspended && !local->resuming,
661 "queueing ieee80211 work while going to suspend\n"))
662 return false;
42935eca
LR		 663
664 return true;
665}
666
667void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
668{
669 struct ieee80211_local *local = hw_to_local(hw);
670
671 if (!ieee80211_can_queue_work(local))
672 return;
673
674 queue_work(local->workqueue, work);
675}
676EXPORT_SYMBOL(ieee80211_queue_work);
677
678void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
679 struct delayed_work *dwork,
680 unsigned long delay)
681{
682 struct ieee80211_local *local = hw_to_local(hw);
683
684 if (!ieee80211_can_queue_work(local))
685 return;
686
687 queue_delayed_work(local->workqueue, dwork, delay);
688}
689EXPORT_SYMBOL(ieee80211_queue_delayed_work);
690
35d865af 691u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 692 struct ieee802_11_elems *elems,
693 u64 filter, u32 crc)
694{
695 size_t left = len;
35d865af 696 const u8 *pos = start;
dd76986b 697 bool calc_crc = filter != 0;
fcff4f10 698 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 699 const u8 *ie;
dd76986b 700
fcff4f10 701 bitmap_zero(seen_elems, 256);
dd76986b
JB		 702 memset(elems, 0, sizeof(*elems));
703 elems->ie_start = start;
704 elems->total_len = len;
705
706 while (left >= 2) {
707 u8 id, elen;
fcff4f10 708 bool elem_parse_failed;
dd76986b
JB		 709
710 id = *pos++;
711 elen = *pos++;
712 left -= 2;
713
fcff4f10
PS		 714 if (elen > left) {
715 elems->parse_error = true;
dd76986b 716 break;
fcff4f10
PS		 717 }
718
9690fb16
JB		 719 switch (id) {
720 case WLAN_EID_SSID:
721 case WLAN_EID_SUPP_RATES:
722 case WLAN_EID_FH_PARAMS:
723 case WLAN_EID_DS_PARAMS:
724 case WLAN_EID_CF_PARAMS:
725 case WLAN_EID_TIM:
726 case WLAN_EID_IBSS_PARAMS:
727 case WLAN_EID_CHALLENGE:
728 case WLAN_EID_RSN:
729 case WLAN_EID_ERP_INFO:
730 case WLAN_EID_EXT_SUPP_RATES:
731 case WLAN_EID_HT_CAPABILITY:
732 case WLAN_EID_HT_OPERATION:
733 case WLAN_EID_VHT_CAPABILITY:
734 case WLAN_EID_VHT_OPERATION:
735 case WLAN_EID_MESH_ID:
736 case WLAN_EID_MESH_CONFIG:
737 case WLAN_EID_PEER_MGMT:
738 case WLAN_EID_PREQ:
739 case WLAN_EID_PREP:
740 case WLAN_EID_PERR:
741 case WLAN_EID_RANN:
742 case WLAN_EID_CHANNEL_SWITCH:
743 case WLAN_EID_EXT_CHANSWITCH_ANN:
744 case WLAN_EID_COUNTRY:
745 case WLAN_EID_PWR_CONSTRAINT:
746 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 747 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf
JB		 748 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
749 /*
750 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
751 * that if the content gets bigger it might be needed more than once
752 */
9690fb16
JB		 753 if (test_bit(id, seen_elems)) {
754 elems->parse_error = true;
755 left -= elen;
756 pos += elen;
757 continue;
758 }
759 break;
fcff4f10 760 }
dd76986b
JB		 761
762 if (calc_crc && id < 64 && (filter & (1ULL << id)))
763 crc = crc32_be(crc, pos - 2, elen + 2);
764
fcff4f10
PS		 765 elem_parse_failed = false;
766
dd76986b
JB		 767 switch (id) {
768 case WLAN_EID_SSID:
769 elems->ssid = pos;
770 elems->ssid_len = elen;
771 break;
772 case WLAN_EID_SUPP_RATES:
773 elems->supp_rates = pos;
774 elems->supp_rates_len = elen;
775 break;
dd76986b 776 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 777 if (elen >= 1)
778 elems->ds_params = pos;
779 else
780 elem_parse_failed = true;
dd76986b 781 break;
dd76986b
JB		 782 case WLAN_EID_TIM:
783 if (elen >= sizeof(struct ieee80211_tim_ie)) {
784 elems->tim = (void *)pos;
785 elems->tim_len = elen;
fcff4f10
PS		 786 } else
787 elem_parse_failed = true;
dd76986b 788 break;
dd76986b
JB		 789 case WLAN_EID_CHALLENGE:
790 elems->challenge = pos;
791 elems->challenge_len = elen;
792 break;
793 case WLAN_EID_VENDOR_SPECIFIC:
794 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
795 pos[2] == 0xf2) {
796 /* Microsoft OUI (00:50:F2) */
797
798 if (calc_crc)
799 crc = crc32_be(crc, pos - 2, elen + 2);
800
441a33ba 801 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 802 /* OUI Type 2 - WMM IE */
803 if (pos[4] == 0) {
804 elems->wmm_info = pos;
805 elems->wmm_info_len = elen;
806 } else if (pos[4] == 1) {
807 elems->wmm_param = pos;
808 elems->wmm_param_len = elen;
809 }
810 }
811 }
812 break;
813 case WLAN_EID_RSN:
814 elems->rsn = pos;
815 elems->rsn_len = elen;
816 break;
817 case WLAN_EID_ERP_INFO:
1946bed9
JB		 818 if (elen >= 1)
819 elems->erp_info = pos;
820 else
821 elem_parse_failed = true;
dd76986b
JB		 822 break;
823 case WLAN_EID_EXT_SUPP_RATES:
824 elems->ext_supp_rates = pos;
825 elems->ext_supp_rates_len = elen;
826 break;
827 case WLAN_EID_HT_CAPABILITY:
828 if (elen >= sizeof(struct ieee80211_ht_cap))
829 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 830 else
831 elem_parse_failed = true;
dd76986b 832 break;
074d46d1
JB		 833 case WLAN_EID_HT_OPERATION:
834 if (elen >= sizeof(struct ieee80211_ht_operation))
835 elems->ht_operation = (void *)pos;
fcff4f10
PS		 836 else
837 elem_parse_failed = true;
dd76986b 838 break;
818255ea
MP		 839 case WLAN_EID_VHT_CAPABILITY:
840 if (elen >= sizeof(struct ieee80211_vht_cap))
841 elems->vht_cap_elem = (void *)pos;
842 else
843 elem_parse_failed = true;
844 break;
845 case WLAN_EID_VHT_OPERATION:
846 if (elen >= sizeof(struct ieee80211_vht_operation))
847 elems->vht_operation = (void *)pos;
848 else
849 elem_parse_failed = true;
850 break;
bee7f586
JB		 851 case WLAN_EID_OPMODE_NOTIF:
852 if (elen > 0)
853 elems->opmode_notif = pos;
854 else
855 elem_parse_failed = true;
856 break;
dd76986b
JB		 857 case WLAN_EID_MESH_ID:
858 elems->mesh_id = pos;
859 elems->mesh_id_len = elen;
860 break;
861 case WLAN_EID_MESH_CONFIG:
862 if (elen >= sizeof(struct ieee80211_meshconf_ie))
863 elems->mesh_config = (void *)pos;
fcff4f10
PS		 864 else
865 elem_parse_failed = true;
dd76986b
JB		 866 break;
867 case WLAN_EID_PEER_MGMT:
868 elems->peering = pos;
869 elems->peering_len = elen;
870 break;
3f52b7e3
MP		 871 case WLAN_EID_MESH_AWAKE_WINDOW:
872 if (elen >= 2)
873 elems->awake_window = (void *)pos;
874 break;
dd76986b
JB		 875 case WLAN_EID_PREQ:
876 elems->preq = pos;
877 elems->preq_len = elen;
878 break;
879 case WLAN_EID_PREP:
880 elems->prep = pos;
881 elems->prep_len = elen;
882 break;
883 case WLAN_EID_PERR:
884 elems->perr = pos;
885 elems->perr_len = elen;
886 break;
887 case WLAN_EID_RANN:
888 if (elen >= sizeof(struct ieee80211_rann_ie))
889 elems->rann = (void *)pos;
fcff4f10
PS		 890 else
891 elem_parse_failed = true;
dd76986b
JB		 892 break;
893 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 894 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
895 elem_parse_failed = true;
896 break;
897 }
898 elems->ch_switch_ie = (void *)pos;
dd76986b 899 break;
b4f286a1
JB		 900 case WLAN_EID_EXT_CHANSWITCH_ANN:
901 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
902 elem_parse_failed = true;
903 break;
904 }
905 elems->ext_chansw_ie = (void *)pos;
906 break;
85220d71
JB		 907 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
908 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
909 elem_parse_failed = true;
910 break;
911 }
912 elems->sec_chan_offs = (void *)pos;
913 break;
b2e506bf
JB		 914 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
915 if (!action ||
916 elen != sizeof(*elems->wide_bw_chansw_ie)) {
917 elem_parse_failed = true;
918 break;
919 }
920 elems->wide_bw_chansw_ie = (void *)pos;
921 break;
922 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
923 if (action) {
924 elem_parse_failed = true;
925 break;
926 }
927 /*
928 * This is a bit tricky, but as we only care about
929 * the wide bandwidth channel switch element, so
930 * just parse it out manually.
931 */
932 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
933 pos, elen);
934 if (ie) {
935 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
936 elems->wide_bw_chansw_ie =
937 (void *)(ie + 2);
938 else
939 elem_parse_failed = true;
940 }
941 break;
dd76986b
JB		 942 case WLAN_EID_COUNTRY:
943 elems->country_elem = pos;
944 elems->country_elem_len = elen;
945 break;
946 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 947 if (elen != 1) {
948 elem_parse_failed = true;
949 break;
950 }
dd76986b 951 elems->pwr_constr_elem = pos;
dd76986b
JB		 952 break;
953 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 954 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
955 elems->timeout_int = (void *)pos;
956 else
957 elem_parse_failed = true;
dd76986b
JB		 958 break;
959 default:
960 break;
961 }
962
fcff4f10
PS		 963 if (elem_parse_failed)
964 elems->parse_error = true;
965 else
5df45690 966 __set_bit(id, seen_elems);
fcff4f10 967
dd76986b
JB		 968 left -= elen;
969 pos += elen;
970 }
971
fcff4f10
PS		 972 if (left != 0)
973 elems->parse_error = true;
974
dd76986b
JB		 975 return crc;
976}
977
3abead59
JB		 978void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
979 bool bss_notify)
5825fe10
JB		 980{
981 struct ieee80211_local *local = sdata->local;
982 struct ieee80211_tx_queue_params qparam;
55de908a 983 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 984 int ac;
a8ce8544 985 bool use_11b, enable_qos;
aa837e1d 986 int aCWmin, aCWmax;
5825fe10
JB		 987
988 if (!local->ops->conf_tx)
989 return;
990
54bcbc69
JB		 991 if (local->hw.queues < IEEE80211_NUM_ACS)
992 return;
993
5825fe10
JB		 994 memset(&qparam, 0, sizeof(qparam));
995
55de908a
JB		 996 rcu_read_lock();
997 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
998 use_11b = (chanctx_conf &&
4bf88530 999 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1000 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1001 rcu_read_unlock();
5825fe10 1002
a8ce8544
SG		 1003 /*
1004 * By default disable QoS in STA mode for old access points, which do
1005 * not support 802.11e. New APs will provide proper queue parameters,
1006 * that we will configure later.
1007 */
1008 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1009
54bcbc69 1010 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
aa837e1d
JB		 1011 /* Set defaults according to 802.11-2007 Table 7-37 */
1012 aCWmax = 1023;
1013 if (use_11b)
1014 aCWmin = 31;
1015 else
1016 aCWmin = 15;
1017
a8ce8544
SG		 1018 if (enable_qos) {
1019 switch (ac) {
1020 case IEEE80211_AC_BK:
1021 qparam.cw_max = aCWmax;
1022 qparam.cw_min = aCWmin;
1023 qparam.txop = 0;
1024 qparam.aifs = 7;
1025 break;
1026 /* never happens but let's not leave undefined */
1027 default:
1028 case IEEE80211_AC_BE:
1029 qparam.cw_max = aCWmax;
1030 qparam.cw_min = aCWmin;
1031 qparam.txop = 0;
1032 qparam.aifs = 3;
1033 break;
1034 case IEEE80211_AC_VI:
1035 qparam.cw_max = aCWmin;
1036 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1037 if (use_11b)
1038 qparam.txop = 6016/32;
1039 else
1040 qparam.txop = 3008/32;
1041 qparam.aifs = 2;
1042 break;
1043 case IEEE80211_AC_VO:
1044 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1045 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1046 if (use_11b)
1047 qparam.txop = 3264/32;
1048 else
1049 qparam.txop = 1504/32;
1050 qparam.aifs = 2;
1051 break;
1052 }
1053 } else {
1054 /* Confiure old 802.11b/g medium access rules. */
7ba10a8e
JB		 1055 qparam.cw_max = aCWmax;
1056 qparam.cw_min = aCWmin;
aa837e1d 1057 qparam.txop = 0;
aa837e1d 1058 qparam.aifs = 2;
aa837e1d 1059 }
5825fe10 1060
ab13315a
KV		 1061 qparam.uapsd = false;
1062
54bcbc69
JB		 1063 sdata->tx_conf[ac] = qparam;
1064 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1065 }
e1b3ec1a 1066
f142c6b9
JB		 1067 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1068 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1069 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1070 if (bss_notify)
1071 ieee80211_bss_info_change_notify(sdata,
1072 BSS_CHANGED_QOS);
d9734979 1073 }
5825fe10 1074}
e50db65c 1075
46900298 1076void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1077 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1078 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1079 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1080 u32 tx_flags)
46900298
JB		 1081{
1082 struct ieee80211_local *local = sdata->local;
1083 struct sk_buff *skb;
1084 struct ieee80211_mgmt *mgmt;
fffd0934 1085 int err;
46900298
JB		 1086
1087 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
65fc73ac 1088 sizeof(*mgmt) + 6 + extra_len);
d15b8459 1089 if (!skb)
46900298 1090 return;
d15b8459 1091
46900298
JB		 1092 skb_reserve(skb, local->hw.extra_tx_headroom);
1093
1094 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1095 memset(mgmt, 0, 24 + 6);
1096 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1097 IEEE80211_STYPE_AUTH);
efa6a09d 1098 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1099 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1100 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1101 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1102 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1103 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1104 if (extra)
1105 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1106
fffd0934
JB		 1107 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1108 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1109 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1110 WARN_ON(err);
1111 }
1112
1672c0e3
JB		 1113 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1114 tx_flags;
62ae67be 1115 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1116}
1117
6ae16775
AQ		 1118void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1119 const u8 *bssid, u16 stype, u16 reason,
1120 bool send_frame, u8 *frame_buf)
1121{
1122 struct ieee80211_local *local = sdata->local;
1123 struct sk_buff *skb;
1124 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1125
1126 /* build frame */
1127 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1128 mgmt->duration = 0; /* initialize only */
1129 mgmt->seq_ctrl = 0; /* initialize only */
1130 memcpy(mgmt->da, bssid, ETH_ALEN);
1131 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1132 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1133 /* u.deauth.reason_code == u.disassoc.reason_code */
1134 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1135
1136 if (send_frame) {
1137 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1138 IEEE80211_DEAUTH_FRAME_LEN);
1139 if (!skb)
1140 return;
1141
1142 skb_reserve(skb, local->hw.extra_tx_headroom);
1143
1144 /* copy in frame */
1145 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1146 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1147
1148 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1149 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1150 IEEE80211_SKB_CB(skb)->flags |=
1151 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1152
1153 ieee80211_tx_skb(sdata, skb);
1154 }
1155}
1156
de95a54b 1157int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
c604b9f2 1158 size_t buffer_len, const u8 *ie, size_t ie_len,
651b5225 1159 enum ieee80211_band band, u32 rate_mask,
2103dec1 1160 struct cfg80211_chan_def *chandef)
de95a54b
JB		 1161{
1162 struct ieee80211_supported_band *sband;
c604b9f2 1163 u8 *pos = buffer, *end = buffer + buffer_len;
8e664fb3
JB		 1164 size_t offset = 0, noffset;
1165 int supp_rates_len, i;
8dcb2003
JM		 1166 u8 rates[32];
1167 int num_rates;
1168 int ext_rates_len;
2103dec1
SW		 1169 int shift;
1170 u32 rate_flags;
de95a54b 1171
4d36ec58 1172 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1173 if (WARN_ON_ONCE(!sband))
1174 return 0;
de95a54b 1175
2103dec1
SW		 1176 rate_flags = ieee80211_chandef_rate_flags(chandef);
1177 shift = ieee80211_chandef_get_shift(chandef);
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 */
2103dec1
SW		 1183 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1184 continue;
1185
1186 rates[num_rates++] =
1187 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1188 (1 << shift) * 5);
8dcb2003
JM		 1189 }
1190
1191 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1192
c604b9f2
JB		 1193 if (end - pos < 2 + supp_rates_len)
1194 goto out_err;
de95a54b 1195 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1196 *pos++ = supp_rates_len;
8dcb2003
JM		 1197 memcpy(pos, rates, supp_rates_len);
1198 pos += supp_rates_len;
8e664fb3
JB		 1199
1200 /* insert "request information" if in custom IEs */
1201 if (ie && ie_len) {
1202 static const u8 before_extrates[] = {
1203 WLAN_EID_SSID,
1204 WLAN_EID_SUPP_RATES,
1205 WLAN_EID_REQUEST,
1206 };
1207 noffset = ieee80211_ie_split(ie, ie_len,
1208 before_extrates,
1209 ARRAY_SIZE(before_extrates),
1210 offset);
c604b9f2
JB		 1211 if (end - pos < noffset - offset)
1212 goto out_err;
8e664fb3
JB		 1213 memcpy(pos, ie + offset, noffset - offset);
1214 pos += noffset - offset;
1215 offset = noffset;
1216 }
1217
8dcb2003
JM		 1218 ext_rates_len = num_rates - supp_rates_len;
1219 if (ext_rates_len > 0) {
c604b9f2
JB		 1220 if (end - pos < 2 + ext_rates_len)
1221 goto out_err;
8e664fb3 1222 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1223 *pos++ = ext_rates_len;
1224 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1225 pos += ext_rates_len;
8e664fb3
JB		 1226 }
1227
2103dec1 1228 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1229 if (end - pos < 3)
1230 goto out_err;
651b5225
JM		 1231 *pos++ = WLAN_EID_DS_PARAMS;
1232 *pos++ = 1;
2103dec1
SW		 1233 *pos++ = ieee80211_frequency_to_channel(
1234 chandef->chan->center_freq);
651b5225
JM		 1235 }
1236
8e664fb3
JB		 1237 /* insert custom IEs that go before HT */
1238 if (ie && ie_len) {
1239 static const u8 before_ht[] = {
1240 WLAN_EID_SSID,
1241 WLAN_EID_SUPP_RATES,
1242 WLAN_EID_REQUEST,
1243 WLAN_EID_EXT_SUPP_RATES,
1244 WLAN_EID_DS_PARAMS,
1245 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1246 };
1247 noffset = ieee80211_ie_split(ie, ie_len,
1248 before_ht, ARRAY_SIZE(before_ht),
1249 offset);
c604b9f2
JB		 1250 if (end - pos < noffset - offset)
1251 goto out_err;
8e664fb3
JB		 1252 memcpy(pos, ie + offset, noffset - offset);
1253 pos += noffset - offset;
1254 offset = noffset;
de95a54b
JB		 1255 }
1256
c604b9f2
JB		 1257 if (sband->ht_cap.ht_supported) {
1258 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1259 goto out_err;
ef96a842
BG		 1260 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1261 sband->ht_cap.cap);
c604b9f2 1262 }
5ef2d41a 1263
de95a54b
JB		 1264 /*
1265 * If adding more here, adjust code in main.c
1266 * that calculates local->scan_ies_len.
1267 */
1268
8e664fb3
JB		 1269 /* add any remaining custom IEs */
1270 if (ie && ie_len) {
1271 noffset = ie_len;
c604b9f2
JB		 1272 if (end - pos < noffset - offset)
1273 goto out_err;
8e664fb3
JB		 1274 memcpy(pos, ie + offset, noffset - offset);
1275 pos += noffset - offset;
de95a54b
JB		 1276 }
1277
c604b9f2
JB		 1278 if (sband->vht_cap.vht_supported) {
1279 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1280 goto out_err;
ba0afa2f
MP		 1281 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1282 sband->vht_cap.cap);
c604b9f2 1283 }
ba0afa2f 1284
c604b9f2
JB		 1285 return pos - buffer;
1286 out_err:
1287 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1288 return pos - buffer;
1289}
1290
a619a4c0 1291struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
85a237fe 1292 u8 *dst, u32 ratemask,
6b77863b 1293 struct ieee80211_channel *chan,
a619a4c0 1294 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1295 const u8 *ie, size_t ie_len,
1296 bool directed)
46900298
JB		 1297{
1298 struct ieee80211_local *local = sdata->local;
2103dec1 1299 struct cfg80211_chan_def chandef;
46900298
JB		 1300 struct sk_buff *skb;
1301 struct ieee80211_mgmt *mgmt;
b9a9ada1 1302 int ies_len;
46900298 1303
a806c558
PS		 1304 /*
1305 * Do not send DS Channel parameter for directed probe requests
1306 * in order to maximize the chance that we get a response. Some
1307 * badly-behaved APs don't respond when this parameter is included.
1308 */
2103dec1 1309 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1310 if (directed)
2103dec1 1311 chandef.chan = NULL;
a806c558 1312 else
2103dec1 1313 chandef.chan = chan;
651b5225 1314
7c12ce8b 1315 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
b9a9ada1 1316 ssid, ssid_len, 100 + ie_len);
5b2bbf75 1317 if (!skb)
b9a9ada1
JB		 1318 return NULL;
1319
1320 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1321 skb_tailroom(skb),
1322 ie, ie_len, chan->band,
2103dec1 1323 ratemask, &chandef);
b9a9ada1 1324 skb_put(skb, ies_len);
7c12ce8b 1325
46900298 1326 if (dst) {
7c12ce8b 1327 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1328 memcpy(mgmt->da, dst, ETH_ALEN);
1329 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1330 }
46900298 1331
62ae67be 1332 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1333
a619a4c0
JO		 1334 return skb;
1335}
1336
1337void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1338 const u8 *ssid, size_t ssid_len,
a806c558 1339 const u8 *ie, size_t ie_len,
1672c0e3 1340 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1341 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1342{
1343 struct sk_buff *skb;
1344
fe94fe05 1345 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
6b77863b 1346 ssid, ssid_len,
85a237fe 1347 ie, ie_len, directed);
aad14ceb 1348 if (skb) {
1672c0e3 1349 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1350 if (scan)
1351 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1352 else
1353 ieee80211_tx_skb(sdata, skb);
aad14ceb 1354 }
46900298
JB		 1355}
1356
2103dec1 1357u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1358 struct ieee802_11_elems *elems,
9ebb61a2 1359 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1360{
1361 struct ieee80211_supported_band *sband;
1362 struct ieee80211_rate *bitrates;
1363 size_t num_rates;
2103dec1
SW		 1364 u32 supp_rates, rate_flags;
1365 int i, j, shift;
1366 sband = sdata->local->hw.wiphy->bands[band];
1367
1368 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1369 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1370
4ee73f33
MK		 1371 if (WARN_ON(!sband))
1372 return 1;
46900298
JB		 1373
1374 bitrates = sband->bitrates;
1375 num_rates = sband->n_bitrates;
1376 supp_rates = 0;
1377 for (i = 0; i < elems->supp_rates_len +
1378 elems->ext_supp_rates_len; i++) {
1379 u8 rate = 0;
1380 int own_rate;
9ebb61a2 1381 bool is_basic;
46900298
JB		 1382 if (i < elems->supp_rates_len)
1383 rate = elems->supp_rates[i];
1384 else if (elems->ext_supp_rates)
1385 rate = elems->ext_supp_rates
1386 [i - elems->supp_rates_len];
1387 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1388 is_basic = !!(rate & 0x80);
1389
1390 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1391 continue;
1392
1393 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1394 int brate;
1395 if ((rate_flags & sband->bitrates[j].flags)
1396 != rate_flags)
1397 continue;
1398
1399 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1400 1 << shift);
1401
1402 if (brate == own_rate) {
46900298 1403 supp_rates |= BIT(j);
9ebb61a2
AN		 1404 if (basic_rates && is_basic)
1405 *basic_rates |= BIT(j);
1406 }
1407 }
46900298
JB		 1408 }
1409 return supp_rates;
1410}
f2753ddb 1411
84f6a01c
JB		 1412void ieee80211_stop_device(struct ieee80211_local *local)
1413{
1414 ieee80211_led_radio(local, false);
67408c8c 1415 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1416
1417 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1418
1419 flush_workqueue(local->workqueue);
678f415f 1420 drv_stop(local);
84f6a01c
JB		 1421}
1422
153a5fc4
SG		 1423static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1424 struct ieee80211_sub_if_data *sdata)
1425{
1426 struct ieee80211_chanctx_conf *conf;
1427 struct ieee80211_chanctx *ctx;
1428
1429 if (!local->use_chanctx)
1430 return;
1431
1432 mutex_lock(&local->chanctx_mtx);
1433 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1434 lockdep_is_held(&local->chanctx_mtx));
1435 if (conf) {
1436 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1437 drv_assign_vif_chanctx(local, sdata, ctx);
1438 }
1439 mutex_unlock(&local->chanctx_mtx);
1440}
1441
f2753ddb
JB		 1442int ieee80211_reconfig(struct ieee80211_local *local)
1443{
1444 struct ieee80211_hw *hw = &local->hw;
1445 struct ieee80211_sub_if_data *sdata;
55de908a 1446 struct ieee80211_chanctx *ctx;
f2753ddb 1447 struct sta_info *sta;
2683d65b 1448 int res, i;
d888130a
JB		 1449 bool reconfig_due_to_wowlan = false;
1450
8f21b0ad 1451#ifdef CONFIG_PM
ceb99fe0
JB		 1452 if (local->suspended)
1453 local->resuming = true;
f2753ddb 1454
eecc4800 1455 if (local->wowlan) {
eecc4800 1456 res = drv_resume(local);
27b3eb9c 1457 local->wowlan = false;
eecc4800
JB		 1458 if (res < 0) {
1459 local->resuming = false;
1460 return res;
1461 }
1462 if (res == 0)
1463 goto wake_up;
1464 WARN_ON(res > 1);
1465 /*
1466 * res is 1, which means the driver requested
1467 * to go through a regular reset on wakeup.
1468 */
d888130a 1469 reconfig_due_to_wowlan = true;
eecc4800
JB		 1470 }
1471#endif
94f9b97b
JB		 1472 /* everything else happens only if HW was up & running */
1473 if (!local->open_count)
1474 goto wake_up;
f2753ddb 1475
94f9b97b
JB		 1476 /*
1477 * Upon resume hardware can sometimes be goofy due to
1478 * various platform / driver / bus issues, so restarting
1479 * the device may at times not work immediately. Propagate
1480 * the error.
1481 */
1482 res = drv_start(local);
1483 if (res) {
1484 WARN(local->suspended, "Hardware became unavailable "
1485 "upon resume. This could be a software issue "
1486 "prior to suspend or a hardware issue.\n");
1487 return res;
f2753ddb
JB		 1488 }
1489
7f281975
YAP		 1490 /* setup fragmentation threshold */
1491 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1492
1493 /* setup RTS threshold */
1494 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1495
1496 /* reset coverage class */
1497 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1498
94f9b97b
JB		 1499 ieee80211_led_radio(local, true);
1500 ieee80211_mod_tpt_led_trig(local,
1501 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1502
f2753ddb 1503 /* add interfaces */
4b6f1dd6
JB		 1504 sdata = rtnl_dereference(local->monitor_sdata);
1505 if (sdata) {
3c3e21e7
JB		 1506 /* in HW restart it exists already */
1507 WARN_ON(local->resuming);
4b6f1dd6
JB		 1508 res = drv_add_interface(local, sdata);
1509 if (WARN_ON(res)) {
1510 rcu_assign_pointer(local->monitor_sdata, NULL);
1511 synchronize_net();
1512 kfree(sdata);
1513 }
1514 }
1515
f2753ddb
JB		 1516 list_for_each_entry(sdata, &local->interfaces, list) {
1517 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1518 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1519 ieee80211_sdata_running(sdata))
7b7eab6f 1520 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1521 }
1522
55de908a 1523 /* add channel contexts */
f0dea9c7
AS		 1524 if (local->use_chanctx) {
1525 mutex_lock(&local->chanctx_mtx);
1526 list_for_each_entry(ctx, &local->chanctx_list, list)
1527 WARN_ON(drv_add_chanctx(local, ctx));
1528 mutex_unlock(&local->chanctx_mtx);
1529 }
55de908a 1530
6352c87f 1531 list_for_each_entry(sdata, &local->interfaces, list) {
6352c87f
JB		 1532 if (!ieee80211_sdata_running(sdata))
1533 continue;
153a5fc4 1534 ieee80211_assign_chanctx(local, sdata);
6352c87f
JB		 1535 }
1536
fe5f2559 1537 sdata = rtnl_dereference(local->monitor_sdata);
153a5fc4
SG		 1538 if (sdata && ieee80211_sdata_running(sdata))
1539 ieee80211_assign_chanctx(local, sdata);
fe5f2559 1540
f2753ddb 1541 /* add STAs back */
34e89507
JB		 1542 mutex_lock(&local->sta_mtx);
1543 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1544 enum ieee80211_sta_state state;
f09603a2 1545
2e8d397e
AN		 1546 if (!sta->uploaded)
1547 continue;
1548
1549 /* AP-mode stations will be added later */
1550 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1551 continue;
1552
1553 for (state = IEEE80211_STA_NOTEXIST;
1554 state < sta->sta_state; state++)
1555 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1556 state + 1));
f2753ddb 1557 }
34e89507 1558 mutex_unlock(&local->sta_mtx);
f2753ddb 1559
2683d65b 1560 /* reconfigure tx conf */
54bcbc69
JB		 1561 if (hw->queues >= IEEE80211_NUM_ACS) {
1562 list_for_each_entry(sdata, &local->interfaces, list) {
1563 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1564 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1565 !ieee80211_sdata_running(sdata))
1566 continue;
f6f3def3 1567
54bcbc69
JB		 1568 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1569 drv_conf_tx(local, sdata, i,
1570 &sdata->tx_conf[i]);
1571 }
f6f3def3 1572 }
2683d65b 1573
f2753ddb
JB		 1574 /* reconfigure hardware */
1575 ieee80211_hw_config(local, ~0);
1576
f2753ddb 1577 ieee80211_configure_filter(local);
f2753ddb
JB		 1578
1579 /* Finally also reconfigure all the BSS information */
1580 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1581 u32 changed;
1582
9607e6b6 1583 if (!ieee80211_sdata_running(sdata))
f2753ddb 1584 continue;
ac8dd506
JB		 1585
1586 /* common change flags for all interface types */
1587 changed = BSS_CHANGED_ERP_CTS_PROT |
1588 BSS_CHANGED_ERP_PREAMBLE |
1589 BSS_CHANGED_ERP_SLOT |
1590 BSS_CHANGED_HT |
1591 BSS_CHANGED_BASIC_RATES |
1592 BSS_CHANGED_BEACON_INT |
1593 BSS_CHANGED_BSSID |
4ced3f74 1594 BSS_CHANGED_CQM |
55de47f6 1595 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1596 BSS_CHANGED_IDLE |
1597 BSS_CHANGED_TXPOWER;
ac8dd506 1598
f2753ddb
JB		 1599 switch (sdata->vif.type) {
1600 case NL80211_IFTYPE_STATION:
0d392e93 1601 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1602 BSS_CHANGED_ARP_FILTER |
1603 BSS_CHANGED_PS;
c65dd147 1604
989c6505
AB		 1605 /* Re-send beacon info report to the driver */
1606 if (sdata->u.mgd.have_beacon)
1607 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1608
8d61ffa5 1609 sdata_lock(sdata);
ac8dd506 1610 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1611 sdata_unlock(sdata);
ac8dd506 1612 break;
f2753ddb 1613 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1614 changed |= BSS_CHANGED_IBSS;
1615 /* fall through */
f2753ddb 1616 case NL80211_IFTYPE_AP:
339afbf4 1617 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1618
1041638f 1619 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1620 changed |= BSS_CHANGED_AP_PROBE_RESP;
1621
1041638f
JB		 1622 if (rcu_access_pointer(sdata->u.ap.beacon))
1623 drv_start_ap(local, sdata);
1624 }
1625
7827493b 1626 /* fall through */
f2753ddb 1627 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1628 if (sdata->vif.bss_conf.enable_beacon) {
1629 changed |= BSS_CHANGED_BEACON |
1630 BSS_CHANGED_BEACON_ENABLED;
1631 ieee80211_bss_info_change_notify(sdata, changed);
1632 }
f2753ddb
JB		 1633 break;
1634 case NL80211_IFTYPE_WDS:
1635 break;
1636 case NL80211_IFTYPE_AP_VLAN:
1637 case NL80211_IFTYPE_MONITOR:
1638 /* ignore virtual */
1639 break;
98104fde 1640 case NL80211_IFTYPE_P2P_DEVICE:
f142c6b9
JB		 1641 changed = BSS_CHANGED_IDLE;
1642 break;
f2753ddb 1643 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1644 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1645 case NL80211_IFTYPE_P2P_CLIENT:
1646 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1647 WARN_ON(1);
1648 break;
1649 }
1650 }
1651
8e1b23b9
ES		 1652 ieee80211_recalc_ps(local, -1);
1653
6e1b1b24
EP		 1654 /*
1655 * The sta might be in psm against the ap (e.g. because
1656 * this was the state before a hw restart), so we
1657 * explicitly send a null packet in order to make sure
1658 * it'll sync against the ap (and get out of psm).
1659 */
1660 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1661 list_for_each_entry(sdata, &local->interfaces, list) {
1662 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1663 continue;
20f544ee
JB		 1664 if (!sdata->u.mgd.associated)
1665 continue;
6e1b1b24
EP		 1666
1667 ieee80211_send_nullfunc(local, sdata, 0);
1668 }
1669 }
1670
2e8d397e
AN		 1671 /* APs are now beaconing, add back stations */
1672 mutex_lock(&local->sta_mtx);
1673 list_for_each_entry(sta, &local->sta_list, list) {
1674 enum ieee80211_sta_state state;
1675
1676 if (!sta->uploaded)
1677 continue;
1678
1679 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1680 continue;
1681
1682 for (state = IEEE80211_STA_NOTEXIST;
1683 state < sta->sta_state; state++)
1684 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1685 state + 1));
1686 }
1687 mutex_unlock(&local->sta_mtx);
1688
7b21aea0
ES		 1689 /* add back keys */
1690 list_for_each_entry(sdata, &local->interfaces, list)
1691 if (ieee80211_sdata_running(sdata))
1692 ieee80211_enable_keys(sdata);
1693
c6209488 1694 wake_up:
04800ada
AN		 1695 local->in_reconfig = false;
1696 barrier();
1697
3c3e21e7
JB		 1698 if (local->monitors == local->open_count && local->monitors > 0)
1699 ieee80211_add_virtual_monitor(local);
1700
2a419056
JB		 1701 /*
1702 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1703 * sessions can be established after a resume.
1704 *
1705 * Also tear down aggregation sessions since reconfiguring
1706 * them in a hardware restart scenario is not easily done
1707 * right now, and the hardware will have lost information
1708 * about the sessions, but we and the AP still think they
1709 * are active. This is really a workaround though.
1710 */
74e2bd1f 1711 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 1712 mutex_lock(&local->sta_mtx);
1713
1714 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 1715 ieee80211_sta_tear_down_BA_sessions(
1716 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 1717 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 1718 }
2a419056
JB		 1719
1720 mutex_unlock(&local->sta_mtx);
74e2bd1f 1721 }
74e2bd1f 1722
445ea4e8
JB		 1723 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1724 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
f2753ddb 1725
5bb644a0
JB		 1726 /*
1727 * If this is for hw restart things are still running.
1728 * We may want to change that later, however.
1729 */
8f21b0ad 1730 if (!local->suspended || reconfig_due_to_wowlan)
9214ad7f 1731 drv_restart_complete(local);
8f21b0ad
JB		 1732
1733 if (!local->suspended)
5bb644a0
JB		 1734 return 0;
1735
1736#ifdef CONFIG_PM
ceb99fe0 1737 /* first set suspended false, then resuming */
5bb644a0 1738 local->suspended = false;
ceb99fe0
JB		 1739 mb();
1740 local->resuming = false;
5bb644a0 1741
b8360ab8
JB		 1742 list_for_each_entry(sdata, &local->interfaces, list) {
1743 if (!ieee80211_sdata_running(sdata))
1744 continue;
1745 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1746 ieee80211_sta_restart(sdata);
1747 }
1748
26d59535 1749 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 1750#else
1751 WARN_ON(1);
1752#endif
f2753ddb
JB		 1753 return 0;
1754}
42935eca 1755
95acac61
JB		 1756void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1757{
1758 struct ieee80211_sub_if_data *sdata;
1759 struct ieee80211_local *local;
1760 struct ieee80211_key *key;
1761
1762 if (WARN_ON(!vif))
1763 return;
1764
1765 sdata = vif_to_sdata(vif);
1766 local = sdata->local;
1767
1768 if (WARN_ON(!local->resuming))
1769 return;
1770
1771 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1772 return;
1773
1774 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1775
1776 mutex_lock(&local->key_mtx);
1777 list_for_each_entry(key, &sdata->key_list, list)
1778 key->flags |= KEY_FLAG_TAINTED;
1779 mutex_unlock(&local->key_mtx);
1780}
1781EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1782
04ecd257 1783void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 1784{
04ecd257
JB		 1785 struct ieee80211_local *local = sdata->local;
1786 struct ieee80211_chanctx_conf *chanctx_conf;
1787 struct ieee80211_chanctx *chanctx;
025e6be2 1788
04ecd257 1789 mutex_lock(&local->chanctx_mtx);
0f78231b 1790
04ecd257
JB		 1791 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1792 lockdep_is_held(&local->chanctx_mtx));
0f78231b 1793
04ecd257 1794 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 1795 goto unlock;
0f78231b 1796
04ecd257
JB		 1797 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1798 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 1799 unlock:
04ecd257 1800 mutex_unlock(&local->chanctx_mtx);
0f78231b 1801}
8e664fb3
JB		 1802
1803static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1804{
1805 int i;
1806
1807 for (i = 0; i < n_ids; i++)
1808 if (ids[i] == id)
1809 return true;
1810 return false;
1811}
1812
1813/**
1814 * ieee80211_ie_split - split an IE buffer according to ordering
1815 *
1816 * @ies: the IE buffer
1817 * @ielen: the length of the IE buffer
1818 * @ids: an array with element IDs that are allowed before
1819 * the split
1820 * @n_ids: the size of the element ID array
1821 * @offset: offset where to start splitting in the buffer
1822 *
1823 * This function splits an IE buffer by updating the @offset
1824 * variable to point to the location where the buffer should be
1825 * split.
1826 *
1827 * It assumes that the given IE buffer is well-formed, this
1828 * has to be guaranteed by the caller!
1829 *
1830 * It also assumes that the IEs in the buffer are ordered
1831 * correctly, if not the result of using this function will not
1832 * be ordered correctly either, i.e. it does no reordering.
1833 *
1834 * The function returns the offset where the next part of the
1835 * buffer starts, which may be @ielen if the entire (remainder)
1836 * of the buffer should be used.
1837 */
1838size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1839 const u8 *ids, int n_ids, size_t offset)
1840{
1841 size_t pos = offset;
1842
1843 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1844 pos += 2 + ies[pos + 1];
1845
1846 return pos;
1847}
1848
1849size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1850{
1851 size_t pos = offset;
1852
1853 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1854 pos += 2 + ies[pos + 1];
1855
1856 return pos;
1857}
615f7b9b
MV		 1858
1859static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1860 int rssi_min_thold,
1861 int rssi_max_thold)
1862{
1863 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1864
1865 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1866 return;
1867
1868 /*
1869 * Scale up threshold values before storing it, as the RSSI averaging
1870 * algorithm uses a scaled up value as well. Change this scaling
1871 * factor if the RSSI averaging algorithm changes.
1872 */
1873 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1874 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1875}
1876
1877void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1878 int rssi_min_thold,
1879 int rssi_max_thold)
1880{
1881 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1882
1883 WARN_ON(rssi_min_thold == rssi_max_thold ||
1884 rssi_min_thold > rssi_max_thold);
1885
1886 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1887 rssi_max_thold);
1888}
1889EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1890
1891void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1892{
1893 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1894
1895 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1896}
1897EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 1898
ef96a842 1899u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 1900 u16 cap)
1901{
1902 __le16 tmp;
1903
1904 *pos++ = WLAN_EID_HT_CAPABILITY;
1905 *pos++ = sizeof(struct ieee80211_ht_cap);
1906 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1907
1908 /* capability flags */
1909 tmp = cpu_to_le16(cap);
1910 memcpy(pos, &tmp, sizeof(u16));
1911 pos += sizeof(u16);
1912
1913 /* AMPDU parameters */
ef96a842
BG		 1914 *pos++ = ht_cap->ampdu_factor |
1915 (ht_cap->ampdu_density <<
42e7aa77
AS		 1916 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1917
1918 /* MCS set */
ef96a842
BG		 1919 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1920 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 1921
1922 /* extended capabilities */
1923 pos += sizeof(__le16);
1924
1925 /* BF capabilities */
1926 pos += sizeof(__le32);
1927
1928 /* antenna selection */
1929 pos += sizeof(u8);
1930
1931 return pos;
1932}
1933
ba0afa2f 1934u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 1935 u32 cap)
ba0afa2f
MP		 1936{
1937 __le32 tmp;
1938
1939 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 1940 *pos++ = sizeof(struct ieee80211_vht_cap);
1941 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 1942
1943 /* capability flags */
1944 tmp = cpu_to_le32(cap);
1945 memcpy(pos, &tmp, sizeof(u32));
1946 pos += sizeof(u32);
1947
1948 /* VHT MCS set */
1949 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1950 pos += sizeof(vht_cap->vht_mcs);
1951
1952 return pos;
1953}
1954
074d46d1 1955u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 1956 const struct cfg80211_chan_def *chandef,
431e3154 1957 u16 prot_mode)
42e7aa77 1958{
074d46d1 1959 struct ieee80211_ht_operation *ht_oper;
42e7aa77 1960 /* Build HT Information */
074d46d1
JB		 1961 *pos++ = WLAN_EID_HT_OPERATION;
1962 *pos++ = sizeof(struct ieee80211_ht_operation);
1963 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 1964 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1965 chandef->chan->center_freq);
1966 switch (chandef->width) {
1967 case NL80211_CHAN_WIDTH_160:
1968 case NL80211_CHAN_WIDTH_80P80:
1969 case NL80211_CHAN_WIDTH_80:
1970 case NL80211_CHAN_WIDTH_40:
1971 if (chandef->center_freq1 > chandef->chan->center_freq)
1972 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1973 else
1974 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 1975 break;
42e7aa77 1976 default:
074d46d1 1977 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 1978 break;
1979 }
aee286c2 1980 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 1981 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1982 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 1983 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 1984
431e3154 1985 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 1986 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 1987
1988 /* It seems that Basic MCS set and Supported MCS set
1989 are identical for the first 10 bytes */
074d46d1
JB		 1990 memset(&ht_oper->basic_set, 0, 16);
1991 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 1992
074d46d1 1993 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 1994}
1995
4bf88530 1996void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 1997 const struct ieee80211_ht_operation *ht_oper,
4bf88530 1998 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 1999{
2000 enum nl80211_channel_type channel_type;
2001
4bf88530
JB		 2002 if (!ht_oper) {
2003 cfg80211_chandef_create(chandef, control_chan,
2004 NL80211_CHAN_NO_HT);
2005 return;
2006 }
42e7aa77 2007
074d46d1 2008 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2009 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2010 channel_type = NL80211_CHAN_HT20;
2011 break;
2012 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2013 channel_type = NL80211_CHAN_HT40PLUS;
2014 break;
2015 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2016 channel_type = NL80211_CHAN_HT40MINUS;
2017 break;
2018 default:
2019 channel_type = NL80211_CHAN_NO_HT;
2020 }
2021
4bf88530 2022 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2023}
2024
2103dec1
SW		 2025int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2026 const struct ieee80211_supported_band *sband,
2027 const u8 *srates, int srates_len, u32 *rates)
2028{
2029 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2030 int shift = ieee80211_chandef_get_shift(chandef);
2031 struct ieee80211_rate *br;
2032 int brate, rate, i, j, count = 0;
2033
2034 *rates = 0;
2035
2036 for (i = 0; i < srates_len; i++) {
2037 rate = srates[i] & 0x7f;
2038
2039 for (j = 0; j < sband->n_bitrates; j++) {
2040 br = &sband->bitrates[j];
2041 if ((rate_flags & br->flags) != rate_flags)
2042 continue;
2043
2044 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2045 if (brate == rate) {
2046 *rates |= BIT(j);
2047 count++;
2048 break;
2049 }
2050 }
2051 }
2052 return count;
2053}
2054
fc8a7321 2055int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2056 struct sk_buff *skb, bool need_basic,
2057 enum ieee80211_band band)
768db343 2058{
768db343
AN		 2059 struct ieee80211_local *local = sdata->local;
2060 struct ieee80211_supported_band *sband;
2103dec1 2061 int rate, shift;
768db343 2062 u8 i, rates, *pos;
fc8a7321 2063 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2064 u32 rate_flags;
768db343 2065
2103dec1
SW		 2066 shift = ieee80211_vif_get_shift(&sdata->vif);
2067 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2068 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2069 rates = 0;
2070 for (i = 0; i < sband->n_bitrates; i++) {
2071 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2072 continue;
2073 rates++;
2074 }
768db343
AN		 2075 if (rates > 8)
2076 rates = 8;
2077
2078 if (skb_tailroom(skb) < rates + 2)
2079 return -ENOMEM;
2080
2081 pos = skb_put(skb, rates + 2);
2082 *pos++ = WLAN_EID_SUPP_RATES;
2083 *pos++ = rates;
2084 for (i = 0; i < rates; i++) {
657c3e0c 2085 u8 basic = 0;
2103dec1
SW		 2086 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2087 continue;
2088
657c3e0c
AN		 2089 if (need_basic && basic_rates & BIT(i))
2090 basic = 0x80;
768db343 2091 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2092 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2093 5 * (1 << shift));
2094 *pos++ = basic | (u8) rate;
768db343
AN		 2095 }
2096
2097 return 0;
2098}
2099
fc8a7321 2100int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2101 struct sk_buff *skb, bool need_basic,
2102 enum ieee80211_band band)
768db343 2103{
768db343
AN		 2104 struct ieee80211_local *local = sdata->local;
2105 struct ieee80211_supported_band *sband;
2103dec1 2106 int rate, skip, shift;
768db343 2107 u8 i, exrates, *pos;
fc8a7321 2108 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2109 u32 rate_flags;
2110
2111 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2112 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2113
6b77863b 2114 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2115 exrates = 0;
2116 for (i = 0; i < sband->n_bitrates; i++) {
2117 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2118 continue;
2119 exrates++;
2120 }
2121
768db343
AN		 2122 if (exrates > 8)
2123 exrates -= 8;
2124 else
2125 exrates = 0;
2126
2127 if (skb_tailroom(skb) < exrates + 2)
2128 return -ENOMEM;
2129
2130 if (exrates) {
2131 pos = skb_put(skb, exrates + 2);
2132 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2133 *pos++ = exrates;
2103dec1 2134 skip = 0;
768db343 2135 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2136 u8 basic = 0;
2103dec1
SW		 2137 if ((rate_flags & sband->bitrates[i].flags)
2138 != rate_flags)
2139 continue;
2140 if (skip++ < 8)
2141 continue;
657c3e0c
AN		 2142 if (need_basic && basic_rates & BIT(i))
2143 basic = 0x80;
2103dec1
SW		 2144 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2145 5 * (1 << shift));
2146 *pos++ = basic | (u8) rate;
768db343
AN		 2147 }
2148 }
2149 return 0;
2150}
1dae27f8
WYG		 2151
2152int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2153{
2154 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2156
be6bcabc
WYG		 2157 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2158 /* non-managed type inferfaces */
2159 return 0;
2160 }
3a7bba64 2161 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2162}
0d8a0a17 2163EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2164
2165u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2166{
2167 if (!mcs)
2168 return 1;
2169
2170 /* TODO: consider rx_highest */
2171
2172 if (mcs->rx_mask[3])
2173 return 4;
2174 if (mcs->rx_mask[2])
2175 return 3;
2176 if (mcs->rx_mask[1])
2177 return 2;
2178 return 1;
2179}
f4bda337
TP		 2180
2181/**
2182 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2183 * @local: mac80211 hw info struct
2184 * @status: RX status
2185 * @mpdu_len: total MPDU length (including FCS)
2186 * @mpdu_offset: offset into MPDU to calculate timestamp at
2187 *
2188 * This function calculates the RX timestamp at the given MPDU offset, taking
2189 * into account what the RX timestamp was. An offset of 0 will just normalize
2190 * the timestamp to TSF at beginning of MPDU reception.
2191 */
2192u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2193 struct ieee80211_rx_status *status,
2194 unsigned int mpdu_len,
2195 unsigned int mpdu_offset)
2196{
2197 u64 ts = status->mactime;
2198 struct rate_info ri;
2199 u16 rate;
2200
2201 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2202 return 0;
2203
2204 memset(&ri, 0, sizeof(ri));
2205
2206 /* Fill cfg80211 rate info */
2207 if (status->flag & RX_FLAG_HT) {
2208 ri.mcs = status->rate_idx;
2209 ri.flags |= RATE_INFO_FLAGS_MCS;
2210 if (status->flag & RX_FLAG_40MHZ)
2211 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2212 if (status->flag & RX_FLAG_SHORT_GI)
2213 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2214 } else if (status->flag & RX_FLAG_VHT) {
2215 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2216 ri.mcs = status->rate_idx;
2217 ri.nss = status->vht_nss;
2218 if (status->flag & RX_FLAG_40MHZ)
2219 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2220 if (status->flag & RX_FLAG_80MHZ)
2221 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2222 if (status->flag & RX_FLAG_80P80MHZ)
2223 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2224 if (status->flag & RX_FLAG_160MHZ)
2225 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2226 if (status->flag & RX_FLAG_SHORT_GI)
2227 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2228 } else {
2229 struct ieee80211_supported_band *sband;
2103dec1
SW		 2230 int shift = 0;
2231 int bitrate;
2232
2233 if (status->flag & RX_FLAG_10MHZ)
2234 shift = 1;
2235 if (status->flag & RX_FLAG_5MHZ)
2236 shift = 2;
f4bda337
TP		 2237
2238 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2239 bitrate = sband->bitrates[status->rate_idx].bitrate;
2240 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2241 }
2242
2243 rate = cfg80211_calculate_bitrate(&ri);
2244
2245 /* rewind from end of MPDU */
2246 if (status->flag & RX_FLAG_MACTIME_END)
2247 ts -= mpdu_len * 8 * 10 / rate;
2248
2249 ts += mpdu_offset * 8 * 10 / rate;
2250
2251 return ts;
2252}
164eb02d
SW		 2253
2254void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2255{
2256 struct ieee80211_sub_if_data *sdata;
2257
2258 mutex_lock(&local->iflist_mtx);
2259 list_for_each_entry(sdata, &local->interfaces, list) {
2260 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2261
2262 if (sdata->wdev.cac_started) {
2263 ieee80211_vif_release_channel(sdata);
2264 cfg80211_cac_event(sdata->dev,
2265 NL80211_RADAR_CAC_ABORTED,
2266 GFP_KERNEL);
2267 }
2268 }
2269 mutex_unlock(&local->iflist_mtx);
2270}
2271
2272void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2273{
2274 struct ieee80211_local *local =
2275 container_of(work, struct ieee80211_local, radar_detected_work);
2276 struct cfg80211_chan_def chandef;
2277
2278 ieee80211_dfs_cac_cancel(local);
2279
2280 if (local->use_chanctx)
2281 /* currently not handled */
2282 WARN_ON(1);
2283 else {
675a0b04 2284 chandef = local->hw.conf.chandef;
164eb02d
SW		 2285 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2286 }
2287}
2288
2289void ieee80211_radar_detected(struct ieee80211_hw *hw)
2290{
2291 struct ieee80211_local *local = hw_to_local(hw);
2292
2293 trace_api_radar_detected(local);
2294
2295 ieee80211_queue_work(hw, &local->radar_detected_work);
2296}
2297EXPORT_SYMBOL(ieee80211_radar_detected);
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