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pinctrl-baytrail: show pin label with the reset of the gpio debug data
[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,
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 (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
304 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
305 continue;
306
a6f38ac3 307 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 308 int ac_queue = sdata->vif.hw_queue[ac];
309
310 if (ac_queue == queue ||
311 (sdata->vif.cab_queue == queue &&
312 local->queue_stop_reasons[ac_queue] == 0 &&
313 skb_queue_empty(&local->pending[ac_queue])))
314 netif_wake_subqueue(sdata->dev, ac);
315 }
316 }
317}
318
ce7c9111
KV		 319static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
320 enum queue_stop_reason reason)
c2d1560a
JB		 321{
322 struct ieee80211_local *local = hw_to_local(hw);
323
b5878a2d
JB		 324 trace_wake_queue(local, queue, reason);
325
e4e72fb4
JB		 326 if (WARN_ON(queue >= hw->queues))
327 return;
ce7c9111 328
ada15125
JB		 329 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
330 return;
331
96f5e66e
JB		 332 __clear_bit(reason, &local->queue_stop_reasons[queue]);
333
334 if (local->queue_stop_reasons[queue] != 0)
335 /* someone still has this queue stopped */
336 return;
337
7236fe29
JB		 338 if (skb_queue_empty(&local->pending[queue])) {
339 rcu_read_lock();
3a25a8c8 340 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 341 rcu_read_unlock();
342 } else
3b8d81e0 343 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 344}
ce7c9111 345
96f5e66e
JB		 346void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
ce7c9111
KV		 348{
349 struct ieee80211_local *local = hw_to_local(hw);
350 unsigned long flags;
351
352 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
353 __ieee80211_wake_queue(hw, queue, reason);
354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
355}
356
357void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
358{
359 ieee80211_wake_queue_by_reason(hw, queue,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER);
361}
c2d1560a
JB		 362EXPORT_SYMBOL(ieee80211_wake_queue);
363
ce7c9111
KV		 364static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
365 enum queue_stop_reason reason)
c2d1560a
JB		 366{
367 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 368 struct ieee80211_sub_if_data *sdata;
a6f38ac3 369 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 370
b5878a2d
JB		 371 trace_stop_queue(local, queue, reason);
372
e4e72fb4
JB		 373 if (WARN_ON(queue >= hw->queues))
374 return;
96f5e66e 375
ada15125
JB		 376 if (test_bit(reason, &local->queue_stop_reasons[queue]))
377 return;
378
2a577d98 379 __set_bit(reason, &local->queue_stop_reasons[queue]);
cf0277e7 380
a6f38ac3
JB		 381 if (local->hw.queues < IEEE80211_NUM_ACS)
382 n_acs = 1;
383
cf0277e7 384 rcu_read_lock();
3a25a8c8
JB		 385 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
386 int ac;
387
f142c6b9
JB		 388 if (!sdata->dev)
389 continue;
390
a6f38ac3 391 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 392 if (sdata->vif.hw_queue[ac] == queue ||
393 sdata->vif.cab_queue == queue)
394 netif_stop_subqueue(sdata->dev, ac);
395 }
396 }
cf0277e7 397 rcu_read_unlock();
c2d1560a 398}
ce7c9111 399
96f5e66e
JB		 400void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
401 enum queue_stop_reason reason)
ce7c9111
KV		 402{
403 struct ieee80211_local *local = hw_to_local(hw);
404 unsigned long flags;
405
406 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
407 __ieee80211_stop_queue(hw, queue, reason);
408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
409}
410
411void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
412{
413 ieee80211_stop_queue_by_reason(hw, queue,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER);
415}
c2d1560a
JB		 416EXPORT_SYMBOL(ieee80211_stop_queue);
417
8f77f384
JB		 418void ieee80211_add_pending_skb(struct ieee80211_local *local,
419 struct sk_buff *skb)
420{
421 struct ieee80211_hw *hw = &local->hw;
422 unsigned long flags;
a7bc376c 423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 424 int queue = info->hw_queue;
a7bc376c
JB		 425
426 if (WARN_ON(!info->control.vif)) {
d4fa14cd 427 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 428 return;
429 }
8f77f384
JB		 430
431 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
432 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
3b8d81e0 433 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 434 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
436}
437
b0b97a8a
JB		 438void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
439 struct sk_buff_head *skbs,
440 void (*fn)(void *data), void *data)
8f77f384
JB		 441{
442 struct ieee80211_hw *hw = &local->hw;
443 struct sk_buff *skb;
444 unsigned long flags;
b0b97a8a 445 int queue, i;
8f77f384
JB		 446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 448 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 449 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
450
451 if (WARN_ON(!info->control.vif)) {
d4fa14cd 452 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 453 continue;
454 }
455
3a25a8c8 456 queue = info->hw_queue;
4644ae89
JB		 457
458 __ieee80211_stop_queue(hw, queue,
459 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
460
3b8d81e0 461 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 462 }
463
50a9432d
JB		 464 if (fn)
465 fn(data);
466
3b8d81e0 467 for (i = 0; i < hw->queues; i++)
8f77f384
JB		 468 __ieee80211_wake_queue(hw, i,
469 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
8f77f384 470 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 471}
472
ce7c9111 473void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8
JB		 474 unsigned long queues,
475 enum queue_stop_reason reason)
c2d1560a 476{
ce7c9111
KV		 477 struct ieee80211_local *local = hw_to_local(hw);
478 unsigned long flags;
c2d1560a
JB		 479 int i;
480
ce7c9111
KV		 481 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
482
445ea4e8 483 for_each_set_bit(i, &queues, hw->queues)
ce7c9111
KV		 484 __ieee80211_stop_queue(hw, i, reason);
485
486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
487}
488
489void ieee80211_stop_queues(struct ieee80211_hw *hw)
490{
445ea4e8 491 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
ce7c9111 492 IEEE80211_QUEUE_STOP_REASON_DRIVER);
c2d1560a
JB		 493}
494EXPORT_SYMBOL(ieee80211_stop_queues);
495
92ab8535
TW		 496int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
497{
498 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 499 unsigned long flags;
500 int ret;
96f5e66e 501
e4e72fb4
JB		 502 if (WARN_ON(queue >= hw->queues))
503 return true;
96f5e66e 504
3b8d81e0 505 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 506 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
507 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
509 return ret;
92ab8535
TW		 510}
511EXPORT_SYMBOL(ieee80211_queue_stopped);
512
ce7c9111 513void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 514 unsigned long queues,
ce7c9111 515 enum queue_stop_reason reason)
c2d1560a 516{
ce7c9111
KV		 517 struct ieee80211_local *local = hw_to_local(hw);
518 unsigned long flags;
c2d1560a
JB		 519 int i;
520
ce7c9111
KV		 521 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
522
445ea4e8 523 for_each_set_bit(i, &queues, hw->queues)
ce7c9111
KV		 524 __ieee80211_wake_queue(hw, i, reason);
525
526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527}
528
529void ieee80211_wake_queues(struct ieee80211_hw *hw)
530{
445ea4e8
JB		 531 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
532 IEEE80211_QUEUE_STOP_REASON_DRIVER);
c2d1560a
JB		 533}
534EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 535
39ecc01d
JB		 536void ieee80211_flush_queues(struct ieee80211_local *local,
537 struct ieee80211_sub_if_data *sdata)
538{
539 u32 queues;
540
541 if (!local->ops->flush)
542 return;
543
544 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
545 int ac;
546
547 queues = 0;
548
549 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
550 queues |= BIT(sdata->vif.hw_queue[ac]);
551 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
552 queues |= BIT(sdata->vif.cab_queue);
553 } else {
554 /* all queues */
555 queues = BIT(local->hw.queues) - 1;
556 }
557
445ea4e8
JB		 558 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
559 IEEE80211_QUEUE_STOP_REASON_FLUSH);
560
39ecc01d 561 drv_flush(local, queues, false);
445ea4e8
JB		 562
563 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
564 IEEE80211_QUEUE_STOP_REASON_FLUSH);
39ecc01d
JB		 565}
566
c7c71066
JB		 567static void __iterate_active_interfaces(struct ieee80211_local *local,
568 u32 iter_flags,
569 void (*iterator)(void *data, u8 *mac,
570 struct ieee80211_vif *vif),
571 void *data)
dabeb344 572{
dabeb344
JB		 573 struct ieee80211_sub_if_data *sdata;
574
c7c71066 575 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 576 switch (sdata->vif.type) {
05c914fe 577 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 578 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
579 continue;
580 break;
05c914fe 581 case NL80211_IFTYPE_AP_VLAN:
2f561feb 582 continue;
2ca27bcf 583 default:
2f561feb
ID		 584 break;
585 }
8b2c9824
JB		 586 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
587 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
588 continue;
9607e6b6 589 if (ieee80211_sdata_running(sdata))
47846c9b 590 iterator(data, sdata->vif.addr,
2f561feb
ID		 591 &sdata->vif);
592 }
593
c7c71066
JB		 594 sdata = rcu_dereference_check(local->monitor_sdata,
595 lockdep_is_held(&local->iflist_mtx) ||
596 lockdep_rtnl_is_held());
8b2c9824
JB		 597 if (sdata &&
598 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
599 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 600 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 601}
685fb72b 602
c7c71066
JB		 603void ieee80211_iterate_active_interfaces(
604 struct ieee80211_hw *hw, u32 iter_flags,
605 void (*iterator)(void *data, u8 *mac,
606 struct ieee80211_vif *vif),
607 void *data)
608{
609 struct ieee80211_local *local = hw_to_local(hw);
610
611 mutex_lock(&local->iflist_mtx);
612 __iterate_active_interfaces(local, iter_flags, iterator, data);
c771c9d8 613 mutex_unlock(&local->iflist_mtx);
2f561feb
ID		 614}
615EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
616
617void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 618 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 619 void (*iterator)(void *data, u8 *mac,
620 struct ieee80211_vif *vif),
621 void *data)
622{
623 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 624
e38bad47 625 rcu_read_lock();
c7c71066
JB		 626 __iterate_active_interfaces(local, iter_flags, iterator, data);
627 rcu_read_unlock();
628}
629EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 630
c7c71066
JB		 631void ieee80211_iterate_active_interfaces_rtnl(
632 struct ieee80211_hw *hw, u32 iter_flags,
633 void (*iterator)(void *data, u8 *mac,
634 struct ieee80211_vif *vif),
635 void *data)
636{
637 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 638
c7c71066 639 ASSERT_RTNL();
685fb72b 640
c7c71066 641 __iterate_active_interfaces(local, iter_flags, iterator, data);
dabeb344 642}
c7c71066 643EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 644
42935eca
LR		 645/*
646 * Nothing should have been stuffed into the workqueue during
647 * the suspend->resume cycle. If this WARN is seen then there
648 * is a bug with either the driver suspend or something in
649 * mac80211 stuffing into the workqueue which we haven't yet
650 * cleared during mac80211's suspend cycle.
651 */
652static bool ieee80211_can_queue_work(struct ieee80211_local *local)
653{
ceb99fe0
JB		 654 if (WARN(local->suspended && !local->resuming,
655 "queueing ieee80211 work while going to suspend\n"))
656 return false;
42935eca
LR		 657
658 return true;
659}
660
661void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
662{
663 struct ieee80211_local *local = hw_to_local(hw);
664
665 if (!ieee80211_can_queue_work(local))
666 return;
667
668 queue_work(local->workqueue, work);
669}
670EXPORT_SYMBOL(ieee80211_queue_work);
671
672void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
673 struct delayed_work *dwork,
674 unsigned long delay)
675{
676 struct ieee80211_local *local = hw_to_local(hw);
677
678 if (!ieee80211_can_queue_work(local))
679 return;
680
681 queue_delayed_work(local->workqueue, dwork, delay);
682}
683EXPORT_SYMBOL(ieee80211_queue_delayed_work);
684
35d865af 685u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 686 struct ieee802_11_elems *elems,
687 u64 filter, u32 crc)
688{
689 size_t left = len;
35d865af 690 const u8 *pos = start;
dd76986b 691 bool calc_crc = filter != 0;
fcff4f10 692 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 693 const u8 *ie;
dd76986b 694
fcff4f10 695 bitmap_zero(seen_elems, 256);
dd76986b
JB		 696 memset(elems, 0, sizeof(*elems));
697 elems->ie_start = start;
698 elems->total_len = len;
699
700 while (left >= 2) {
701 u8 id, elen;
fcff4f10 702 bool elem_parse_failed;
dd76986b
JB		 703
704 id = *pos++;
705 elen = *pos++;
706 left -= 2;
707
fcff4f10
PS		 708 if (elen > left) {
709 elems->parse_error = true;
dd76986b 710 break;
fcff4f10
PS		 711 }
712
9690fb16
JB		 713 switch (id) {
714 case WLAN_EID_SSID:
715 case WLAN_EID_SUPP_RATES:
716 case WLAN_EID_FH_PARAMS:
717 case WLAN_EID_DS_PARAMS:
718 case WLAN_EID_CF_PARAMS:
719 case WLAN_EID_TIM:
720 case WLAN_EID_IBSS_PARAMS:
721 case WLAN_EID_CHALLENGE:
722 case WLAN_EID_RSN:
723 case WLAN_EID_ERP_INFO:
724 case WLAN_EID_EXT_SUPP_RATES:
725 case WLAN_EID_HT_CAPABILITY:
726 case WLAN_EID_HT_OPERATION:
727 case WLAN_EID_VHT_CAPABILITY:
728 case WLAN_EID_VHT_OPERATION:
729 case WLAN_EID_MESH_ID:
730 case WLAN_EID_MESH_CONFIG:
731 case WLAN_EID_PEER_MGMT:
732 case WLAN_EID_PREQ:
733 case WLAN_EID_PREP:
734 case WLAN_EID_PERR:
735 case WLAN_EID_RANN:
736 case WLAN_EID_CHANNEL_SWITCH:
737 case WLAN_EID_EXT_CHANSWITCH_ANN:
738 case WLAN_EID_COUNTRY:
739 case WLAN_EID_PWR_CONSTRAINT:
740 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 741 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 742 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 743 case WLAN_EID_CHAN_SWITCH_PARAM:
b2e506bf
JB		 744 /*
745 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
746 * that if the content gets bigger it might be needed more than once
747 */
9690fb16
JB		 748 if (test_bit(id, seen_elems)) {
749 elems->parse_error = true;
750 left -= elen;
751 pos += elen;
752 continue;
753 }
754 break;
fcff4f10 755 }
dd76986b
JB		 756
757 if (calc_crc && id < 64 && (filter & (1ULL << id)))
758 crc = crc32_be(crc, pos - 2, elen + 2);
759
fcff4f10
PS		 760 elem_parse_failed = false;
761
dd76986b
JB		 762 switch (id) {
763 case WLAN_EID_SSID:
764 elems->ssid = pos;
765 elems->ssid_len = elen;
766 break;
767 case WLAN_EID_SUPP_RATES:
768 elems->supp_rates = pos;
769 elems->supp_rates_len = elen;
770 break;
dd76986b 771 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 772 if (elen >= 1)
773 elems->ds_params = pos;
774 else
775 elem_parse_failed = true;
dd76986b 776 break;
dd76986b
JB		 777 case WLAN_EID_TIM:
778 if (elen >= sizeof(struct ieee80211_tim_ie)) {
779 elems->tim = (void *)pos;
780 elems->tim_len = elen;
fcff4f10
PS		 781 } else
782 elem_parse_failed = true;
dd76986b 783 break;
dd76986b
JB		 784 case WLAN_EID_CHALLENGE:
785 elems->challenge = pos;
786 elems->challenge_len = elen;
787 break;
788 case WLAN_EID_VENDOR_SPECIFIC:
789 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
790 pos[2] == 0xf2) {
791 /* Microsoft OUI (00:50:F2) */
792
793 if (calc_crc)
794 crc = crc32_be(crc, pos - 2, elen + 2);
795
441a33ba 796 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 797 /* OUI Type 2 - WMM IE */
798 if (pos[4] == 0) {
799 elems->wmm_info = pos;
800 elems->wmm_info_len = elen;
801 } else if (pos[4] == 1) {
802 elems->wmm_param = pos;
803 elems->wmm_param_len = elen;
804 }
805 }
806 }
807 break;
808 case WLAN_EID_RSN:
809 elems->rsn = pos;
810 elems->rsn_len = elen;
811 break;
812 case WLAN_EID_ERP_INFO:
1946bed9
JB		 813 if (elen >= 1)
814 elems->erp_info = pos;
815 else
816 elem_parse_failed = true;
dd76986b
JB		 817 break;
818 case WLAN_EID_EXT_SUPP_RATES:
819 elems->ext_supp_rates = pos;
820 elems->ext_supp_rates_len = elen;
821 break;
822 case WLAN_EID_HT_CAPABILITY:
823 if (elen >= sizeof(struct ieee80211_ht_cap))
824 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 825 else
826 elem_parse_failed = true;
dd76986b 827 break;
074d46d1
JB		 828 case WLAN_EID_HT_OPERATION:
829 if (elen >= sizeof(struct ieee80211_ht_operation))
830 elems->ht_operation = (void *)pos;
fcff4f10
PS		 831 else
832 elem_parse_failed = true;
dd76986b 833 break;
818255ea
MP		 834 case WLAN_EID_VHT_CAPABILITY:
835 if (elen >= sizeof(struct ieee80211_vht_cap))
836 elems->vht_cap_elem = (void *)pos;
837 else
838 elem_parse_failed = true;
839 break;
840 case WLAN_EID_VHT_OPERATION:
841 if (elen >= sizeof(struct ieee80211_vht_operation))
842 elems->vht_operation = (void *)pos;
843 else
844 elem_parse_failed = true;
845 break;
bee7f586
JB		 846 case WLAN_EID_OPMODE_NOTIF:
847 if (elen > 0)
848 elems->opmode_notif = pos;
849 else
850 elem_parse_failed = true;
851 break;
dd76986b
JB		 852 case WLAN_EID_MESH_ID:
853 elems->mesh_id = pos;
854 elems->mesh_id_len = elen;
855 break;
856 case WLAN_EID_MESH_CONFIG:
857 if (elen >= sizeof(struct ieee80211_meshconf_ie))
858 elems->mesh_config = (void *)pos;
fcff4f10
PS		 859 else
860 elem_parse_failed = true;
dd76986b
JB		 861 break;
862 case WLAN_EID_PEER_MGMT:
863 elems->peering = pos;
864 elems->peering_len = elen;
865 break;
3f52b7e3
MP		 866 case WLAN_EID_MESH_AWAKE_WINDOW:
867 if (elen >= 2)
868 elems->awake_window = (void *)pos;
869 break;
dd76986b
JB		 870 case WLAN_EID_PREQ:
871 elems->preq = pos;
872 elems->preq_len = elen;
873 break;
874 case WLAN_EID_PREP:
875 elems->prep = pos;
876 elems->prep_len = elen;
877 break;
878 case WLAN_EID_PERR:
879 elems->perr = pos;
880 elems->perr_len = elen;
881 break;
882 case WLAN_EID_RANN:
883 if (elen >= sizeof(struct ieee80211_rann_ie))
884 elems->rann = (void *)pos;
fcff4f10
PS		 885 else
886 elem_parse_failed = true;
dd76986b
JB		 887 break;
888 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 889 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
890 elem_parse_failed = true;
891 break;
892 }
893 elems->ch_switch_ie = (void *)pos;
dd76986b 894 break;
b4f286a1
JB		 895 case WLAN_EID_EXT_CHANSWITCH_ANN:
896 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
897 elem_parse_failed = true;
898 break;
899 }
900 elems->ext_chansw_ie = (void *)pos;
901 break;
85220d71
JB		 902 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
903 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
904 elem_parse_failed = true;
905 break;
906 }
907 elems->sec_chan_offs = (void *)pos;
908 break;
8f2535b9
CYY		 909 case WLAN_EID_CHAN_SWITCH_PARAM:
910 if (elen !=
911 sizeof(*elems->mesh_chansw_params_ie)) {
912 elem_parse_failed = true;
913 break;
914 }
915 elems->mesh_chansw_params_ie = (void *)pos;
916 break;
b2e506bf
JB		 917 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
918 if (!action ||
919 elen != sizeof(*elems->wide_bw_chansw_ie)) {
920 elem_parse_failed = true;
921 break;
922 }
923 elems->wide_bw_chansw_ie = (void *)pos;
924 break;
925 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
926 if (action) {
927 elem_parse_failed = true;
928 break;
929 }
930 /*
931 * This is a bit tricky, but as we only care about
932 * the wide bandwidth channel switch element, so
933 * just parse it out manually.
934 */
935 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
936 pos, elen);
937 if (ie) {
938 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
939 elems->wide_bw_chansw_ie =
940 (void *)(ie + 2);
941 else
942 elem_parse_failed = true;
943 }
944 break;
dd76986b
JB		 945 case WLAN_EID_COUNTRY:
946 elems->country_elem = pos;
947 elems->country_elem_len = elen;
948 break;
949 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 950 if (elen != 1) {
951 elem_parse_failed = true;
952 break;
953 }
dd76986b 954 elems->pwr_constr_elem = pos;
dd76986b
JB		 955 break;
956 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 957 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
958 elems->timeout_int = (void *)pos;
959 else
960 elem_parse_failed = true;
dd76986b
JB		 961 break;
962 default:
963 break;
964 }
965
fcff4f10
PS		 966 if (elem_parse_failed)
967 elems->parse_error = true;
968 else
5df45690 969 __set_bit(id, seen_elems);
fcff4f10 970
dd76986b
JB		 971 left -= elen;
972 pos += elen;
973 }
974
fcff4f10
PS		 975 if (left != 0)
976 elems->parse_error = true;
977
dd76986b
JB		 978 return crc;
979}
980
3abead59
JB		 981void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
982 bool bss_notify)
5825fe10
JB		 983{
984 struct ieee80211_local *local = sdata->local;
985 struct ieee80211_tx_queue_params qparam;
55de908a 986 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 987 int ac;
a8ce8544 988 bool use_11b, enable_qos;
aa837e1d 989 int aCWmin, aCWmax;
5825fe10
JB		 990
991 if (!local->ops->conf_tx)
992 return;
993
54bcbc69
JB		 994 if (local->hw.queues < IEEE80211_NUM_ACS)
995 return;
996
5825fe10
JB		 997 memset(&qparam, 0, sizeof(qparam));
998
55de908a
JB		 999 rcu_read_lock();
1000 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1001 use_11b = (chanctx_conf &&
4bf88530 1002 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1003 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1004 rcu_read_unlock();
5825fe10 1005
a8ce8544
SG		 1006 /*
1007 * By default disable QoS in STA mode for old access points, which do
1008 * not support 802.11e. New APs will provide proper queue parameters,
1009 * that we will configure later.
1010 */
1011 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1012
1f4ffde8
FZ		 1013 /* Set defaults according to 802.11-2007 Table 7-37 */
1014 aCWmax = 1023;
1015 if (use_11b)
1016 aCWmin = 31;
1017 else
1018 aCWmin = 15;
1019
1020 /* Confiure old 802.11b/g medium access rules. */
1021 qparam.cw_max = aCWmax;
1022 qparam.cw_min = aCWmin;
1023 qparam.txop = 0;
1024 qparam.aifs = 2;
aa837e1d 1025
1f4ffde8
FZ		 1026 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1027 /* Update if QoS is enabled. */
a8ce8544
SG		 1028 if (enable_qos) {
1029 switch (ac) {
1030 case IEEE80211_AC_BK:
1031 qparam.cw_max = aCWmax;
1032 qparam.cw_min = aCWmin;
1033 qparam.txop = 0;
1034 qparam.aifs = 7;
1035 break;
1036 /* never happens but let's not leave undefined */
1037 default:
1038 case IEEE80211_AC_BE:
1039 qparam.cw_max = aCWmax;
1040 qparam.cw_min = aCWmin;
1041 qparam.txop = 0;
1042 qparam.aifs = 3;
1043 break;
1044 case IEEE80211_AC_VI:
1045 qparam.cw_max = aCWmin;
1046 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1047 if (use_11b)
1048 qparam.txop = 6016/32;
1049 else
1050 qparam.txop = 3008/32;
1051 qparam.aifs = 2;
1052 break;
1053 case IEEE80211_AC_VO:
1054 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1055 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1056 if (use_11b)
1057 qparam.txop = 3264/32;
1058 else
1059 qparam.txop = 1504/32;
1060 qparam.aifs = 2;
1061 break;
1062 }
aa837e1d 1063 }
5825fe10 1064
ab13315a
KV		 1065 qparam.uapsd = false;
1066
54bcbc69
JB		 1067 sdata->tx_conf[ac] = qparam;
1068 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1069 }
e1b3ec1a 1070
f142c6b9
JB		 1071 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1072 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1073 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1074 if (bss_notify)
1075 ieee80211_bss_info_change_notify(sdata,
1076 BSS_CHANGED_QOS);
d9734979 1077 }
5825fe10 1078}
e50db65c 1079
46900298 1080void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1081 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1082 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1083 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1084 u32 tx_flags)
46900298
JB		 1085{
1086 struct ieee80211_local *local = sdata->local;
1087 struct sk_buff *skb;
1088 struct ieee80211_mgmt *mgmt;
fffd0934 1089 int err;
46900298 1090
15e230ab
FZ		 1091 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1092 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
d15b8459 1093 if (!skb)
46900298 1094 return;
d15b8459 1095
46900298
JB		 1096 skb_reserve(skb, local->hw.extra_tx_headroom);
1097
1098 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1099 memset(mgmt, 0, 24 + 6);
1100 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1101 IEEE80211_STYPE_AUTH);
efa6a09d 1102 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1103 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1104 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1105 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1106 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1107 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1108 if (extra)
1109 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1110
fffd0934
JB		 1111 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1112 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1113 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1114 WARN_ON(err);
1115 }
1116
1672c0e3
JB		 1117 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1118 tx_flags;
62ae67be 1119 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1120}
1121
6ae16775
AQ		 1122void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1123 const u8 *bssid, u16 stype, u16 reason,
1124 bool send_frame, u8 *frame_buf)
1125{
1126 struct ieee80211_local *local = sdata->local;
1127 struct sk_buff *skb;
1128 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1129
1130 /* build frame */
1131 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1132 mgmt->duration = 0; /* initialize only */
1133 mgmt->seq_ctrl = 0; /* initialize only */
1134 memcpy(mgmt->da, bssid, ETH_ALEN);
1135 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1136 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1137 /* u.deauth.reason_code == u.disassoc.reason_code */
1138 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1139
1140 if (send_frame) {
1141 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1142 IEEE80211_DEAUTH_FRAME_LEN);
1143 if (!skb)
1144 return;
1145
1146 skb_reserve(skb, local->hw.extra_tx_headroom);
1147
1148 /* copy in frame */
1149 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1150 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1151
1152 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1153 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1154 IEEE80211_SKB_CB(skb)->flags |=
1155 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1156
1157 ieee80211_tx_skb(sdata, skb);
1158 }
1159}
1160
de95a54b 1161int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
c604b9f2 1162 size_t buffer_len, const u8 *ie, size_t ie_len,
651b5225 1163 enum ieee80211_band band, u32 rate_mask,
2103dec1 1164 struct cfg80211_chan_def *chandef)
de95a54b
JB		 1165{
1166 struct ieee80211_supported_band *sband;
c604b9f2 1167 u8 *pos = buffer, *end = buffer + buffer_len;
8e664fb3
JB		 1168 size_t offset = 0, noffset;
1169 int supp_rates_len, i;
8dcb2003
JM		 1170 u8 rates[32];
1171 int num_rates;
1172 int ext_rates_len;
2103dec1
SW		 1173 int shift;
1174 u32 rate_flags;
de95a54b 1175
4d36ec58 1176 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1177 if (WARN_ON_ONCE(!sband))
1178 return 0;
de95a54b 1179
2103dec1
SW		 1180 rate_flags = ieee80211_chandef_rate_flags(chandef);
1181 shift = ieee80211_chandef_get_shift(chandef);
1182
8dcb2003
JM		 1183 num_rates = 0;
1184 for (i = 0; i < sband->n_bitrates; i++) {
1185 if ((BIT(i) & rate_mask) == 0)
1186 continue; /* skip rate */
2103dec1
SW		 1187 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1188 continue;
1189
1190 rates[num_rates++] =
1191 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1192 (1 << shift) * 5);
8dcb2003
JM		 1193 }
1194
1195 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1196
c604b9f2
JB		 1197 if (end - pos < 2 + supp_rates_len)
1198 goto out_err;
de95a54b 1199 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1200 *pos++ = supp_rates_len;
8dcb2003
JM		 1201 memcpy(pos, rates, supp_rates_len);
1202 pos += supp_rates_len;
8e664fb3
JB		 1203
1204 /* insert "request information" if in custom IEs */
1205 if (ie && ie_len) {
1206 static const u8 before_extrates[] = {
1207 WLAN_EID_SSID,
1208 WLAN_EID_SUPP_RATES,
1209 WLAN_EID_REQUEST,
1210 };
1211 noffset = ieee80211_ie_split(ie, ie_len,
1212 before_extrates,
1213 ARRAY_SIZE(before_extrates),
1214 offset);
c604b9f2
JB		 1215 if (end - pos < noffset - offset)
1216 goto out_err;
8e664fb3
JB		 1217 memcpy(pos, ie + offset, noffset - offset);
1218 pos += noffset - offset;
1219 offset = noffset;
1220 }
1221
8dcb2003
JM		 1222 ext_rates_len = num_rates - supp_rates_len;
1223 if (ext_rates_len > 0) {
c604b9f2
JB		 1224 if (end - pos < 2 + ext_rates_len)
1225 goto out_err;
8e664fb3 1226 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1227 *pos++ = ext_rates_len;
1228 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1229 pos += ext_rates_len;
8e664fb3
JB		 1230 }
1231
2103dec1 1232 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1233 if (end - pos < 3)
1234 goto out_err;
651b5225
JM		 1235 *pos++ = WLAN_EID_DS_PARAMS;
1236 *pos++ = 1;
2103dec1
SW		 1237 *pos++ = ieee80211_frequency_to_channel(
1238 chandef->chan->center_freq);
651b5225
JM		 1239 }
1240
8e664fb3
JB		 1241 /* insert custom IEs that go before HT */
1242 if (ie && ie_len) {
1243 static const u8 before_ht[] = {
1244 WLAN_EID_SSID,
1245 WLAN_EID_SUPP_RATES,
1246 WLAN_EID_REQUEST,
1247 WLAN_EID_EXT_SUPP_RATES,
1248 WLAN_EID_DS_PARAMS,
1249 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1250 };
1251 noffset = ieee80211_ie_split(ie, ie_len,
1252 before_ht, ARRAY_SIZE(before_ht),
1253 offset);
c604b9f2
JB		 1254 if (end - pos < noffset - offset)
1255 goto out_err;
8e664fb3
JB		 1256 memcpy(pos, ie + offset, noffset - offset);
1257 pos += noffset - offset;
1258 offset = noffset;
de95a54b
JB		 1259 }
1260
c604b9f2
JB		 1261 if (sband->ht_cap.ht_supported) {
1262 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1263 goto out_err;
ef96a842
BG		 1264 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1265 sband->ht_cap.cap);
c604b9f2 1266 }
5ef2d41a 1267
de95a54b
JB		 1268 /*
1269 * If adding more here, adjust code in main.c
1270 * that calculates local->scan_ies_len.
1271 */
1272
8e664fb3
JB		 1273 /* add any remaining custom IEs */
1274 if (ie && ie_len) {
1275 noffset = ie_len;
c604b9f2
JB		 1276 if (end - pos < noffset - offset)
1277 goto out_err;
8e664fb3
JB		 1278 memcpy(pos, ie + offset, noffset - offset);
1279 pos += noffset - offset;
de95a54b
JB		 1280 }
1281
c604b9f2
JB		 1282 if (sband->vht_cap.vht_supported) {
1283 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1284 goto out_err;
ba0afa2f
MP		 1285 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1286 sband->vht_cap.cap);
c604b9f2 1287 }
ba0afa2f 1288
c604b9f2
JB		 1289 return pos - buffer;
1290 out_err:
1291 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1292 return pos - buffer;
1293}
1294
a619a4c0 1295struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
85a237fe 1296 u8 *dst, u32 ratemask,
6b77863b 1297 struct ieee80211_channel *chan,
a619a4c0 1298 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1299 const u8 *ie, size_t ie_len,
1300 bool directed)
46900298
JB		 1301{
1302 struct ieee80211_local *local = sdata->local;
2103dec1 1303 struct cfg80211_chan_def chandef;
46900298
JB		 1304 struct sk_buff *skb;
1305 struct ieee80211_mgmt *mgmt;
b9a9ada1 1306 int ies_len;
46900298 1307
a806c558
PS		 1308 /*
1309 * Do not send DS Channel parameter for directed probe requests
1310 * in order to maximize the chance that we get a response. Some
1311 * badly-behaved APs don't respond when this parameter is included.
1312 */
2103dec1 1313 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1314 if (directed)
2103dec1 1315 chandef.chan = NULL;
a806c558 1316 else
2103dec1 1317 chandef.chan = chan;
651b5225 1318
7c12ce8b 1319 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
b9a9ada1 1320 ssid, ssid_len, 100 + ie_len);
5b2bbf75 1321 if (!skb)
b9a9ada1
JB		 1322 return NULL;
1323
1324 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1325 skb_tailroom(skb),
1326 ie, ie_len, chan->band,
2103dec1 1327 ratemask, &chandef);
b9a9ada1 1328 skb_put(skb, ies_len);
7c12ce8b 1329
46900298 1330 if (dst) {
7c12ce8b 1331 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1332 memcpy(mgmt->da, dst, ETH_ALEN);
1333 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1334 }
46900298 1335
62ae67be 1336 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1337
a619a4c0
JO		 1338 return skb;
1339}
1340
1341void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1342 const u8 *ssid, size_t ssid_len,
a806c558 1343 const u8 *ie, size_t ie_len,
1672c0e3 1344 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1345 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1346{
1347 struct sk_buff *skb;
1348
fe94fe05 1349 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
6b77863b 1350 ssid, ssid_len,
85a237fe 1351 ie, ie_len, directed);
aad14ceb 1352 if (skb) {
1672c0e3 1353 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1354 if (scan)
1355 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1356 else
1357 ieee80211_tx_skb(sdata, skb);
aad14ceb 1358 }
46900298
JB		 1359}
1360
2103dec1 1361u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1362 struct ieee802_11_elems *elems,
9ebb61a2 1363 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1364{
1365 struct ieee80211_supported_band *sband;
1366 struct ieee80211_rate *bitrates;
1367 size_t num_rates;
2103dec1
SW		 1368 u32 supp_rates, rate_flags;
1369 int i, j, shift;
1370 sband = sdata->local->hw.wiphy->bands[band];
1371
1372 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1373 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1374
4ee73f33
MK		 1375 if (WARN_ON(!sband))
1376 return 1;
46900298
JB		 1377
1378 bitrates = sband->bitrates;
1379 num_rates = sband->n_bitrates;
1380 supp_rates = 0;
1381 for (i = 0; i < elems->supp_rates_len +
1382 elems->ext_supp_rates_len; i++) {
1383 u8 rate = 0;
1384 int own_rate;
9ebb61a2 1385 bool is_basic;
46900298
JB		 1386 if (i < elems->supp_rates_len)
1387 rate = elems->supp_rates[i];
1388 else if (elems->ext_supp_rates)
1389 rate = elems->ext_supp_rates
1390 [i - elems->supp_rates_len];
1391 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1392 is_basic = !!(rate & 0x80);
1393
1394 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1395 continue;
1396
1397 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1398 int brate;
1399 if ((rate_flags & sband->bitrates[j].flags)
1400 != rate_flags)
1401 continue;
1402
1403 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1404 1 << shift);
1405
1406 if (brate == own_rate) {
46900298 1407 supp_rates |= BIT(j);
9ebb61a2
AN		 1408 if (basic_rates && is_basic)
1409 *basic_rates |= BIT(j);
1410 }
1411 }
46900298
JB		 1412 }
1413 return supp_rates;
1414}
f2753ddb 1415
84f6a01c
JB		 1416void ieee80211_stop_device(struct ieee80211_local *local)
1417{
1418 ieee80211_led_radio(local, false);
67408c8c 1419 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1420
1421 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1422
1423 flush_workqueue(local->workqueue);
678f415f 1424 drv_stop(local);
84f6a01c
JB		 1425}
1426
153a5fc4
SG		 1427static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1428 struct ieee80211_sub_if_data *sdata)
1429{
1430 struct ieee80211_chanctx_conf *conf;
1431 struct ieee80211_chanctx *ctx;
1432
1433 if (!local->use_chanctx)
1434 return;
1435
1436 mutex_lock(&local->chanctx_mtx);
1437 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1438 lockdep_is_held(&local->chanctx_mtx));
1439 if (conf) {
1440 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1441 drv_assign_vif_chanctx(local, sdata, ctx);
1442 }
1443 mutex_unlock(&local->chanctx_mtx);
1444}
1445
f2753ddb
JB		 1446int ieee80211_reconfig(struct ieee80211_local *local)
1447{
1448 struct ieee80211_hw *hw = &local->hw;
1449 struct ieee80211_sub_if_data *sdata;
55de908a 1450 struct ieee80211_chanctx *ctx;
f2753ddb 1451 struct sta_info *sta;
2683d65b 1452 int res, i;
d888130a
JB		 1453 bool reconfig_due_to_wowlan = false;
1454
8f21b0ad 1455#ifdef CONFIG_PM
ceb99fe0
JB		 1456 if (local->suspended)
1457 local->resuming = true;
f2753ddb 1458
eecc4800 1459 if (local->wowlan) {
eecc4800 1460 res = drv_resume(local);
27b3eb9c 1461 local->wowlan = false;
eecc4800
JB		 1462 if (res < 0) {
1463 local->resuming = false;
1464 return res;
1465 }
1466 if (res == 0)
1467 goto wake_up;
1468 WARN_ON(res > 1);
1469 /*
1470 * res is 1, which means the driver requested
1471 * to go through a regular reset on wakeup.
1472 */
d888130a 1473 reconfig_due_to_wowlan = true;
eecc4800
JB		 1474 }
1475#endif
94f9b97b
JB		 1476 /* everything else happens only if HW was up & running */
1477 if (!local->open_count)
1478 goto wake_up;
f2753ddb 1479
94f9b97b
JB		 1480 /*
1481 * Upon resume hardware can sometimes be goofy due to
1482 * various platform / driver / bus issues, so restarting
1483 * the device may at times not work immediately. Propagate
1484 * the error.
1485 */
1486 res = drv_start(local);
1487 if (res) {
1488 WARN(local->suspended, "Hardware became unavailable "
1489 "upon resume. This could be a software issue "
1490 "prior to suspend or a hardware issue.\n");
1491 return res;
f2753ddb
JB		 1492 }
1493
7f281975
YAP		 1494 /* setup fragmentation threshold */
1495 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1496
1497 /* setup RTS threshold */
1498 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1499
1500 /* reset coverage class */
1501 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1502
94f9b97b
JB		 1503 ieee80211_led_radio(local, true);
1504 ieee80211_mod_tpt_led_trig(local,
1505 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1506
f2753ddb 1507 /* add interfaces */
4b6f1dd6
JB		 1508 sdata = rtnl_dereference(local->monitor_sdata);
1509 if (sdata) {
3c3e21e7
JB		 1510 /* in HW restart it exists already */
1511 WARN_ON(local->resuming);
4b6f1dd6
JB		 1512 res = drv_add_interface(local, sdata);
1513 if (WARN_ON(res)) {
1514 rcu_assign_pointer(local->monitor_sdata, NULL);
1515 synchronize_net();
1516 kfree(sdata);
1517 }
1518 }
1519
f2753ddb
JB		 1520 list_for_each_entry(sdata, &local->interfaces, list) {
1521 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1522 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1523 ieee80211_sdata_running(sdata))
7b7eab6f 1524 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1525 }
1526
55de908a 1527 /* add channel contexts */
f0dea9c7
AS		 1528 if (local->use_chanctx) {
1529 mutex_lock(&local->chanctx_mtx);
1530 list_for_each_entry(ctx, &local->chanctx_list, list)
1531 WARN_ON(drv_add_chanctx(local, ctx));
1532 mutex_unlock(&local->chanctx_mtx);
1533 }
55de908a 1534
6352c87f 1535 list_for_each_entry(sdata, &local->interfaces, list) {
6352c87f
JB		 1536 if (!ieee80211_sdata_running(sdata))
1537 continue;
153a5fc4 1538 ieee80211_assign_chanctx(local, sdata);
6352c87f
JB		 1539 }
1540
fe5f2559 1541 sdata = rtnl_dereference(local->monitor_sdata);
153a5fc4
SG		 1542 if (sdata && ieee80211_sdata_running(sdata))
1543 ieee80211_assign_chanctx(local, sdata);
fe5f2559 1544
f2753ddb 1545 /* add STAs back */
34e89507
JB		 1546 mutex_lock(&local->sta_mtx);
1547 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1548 enum ieee80211_sta_state state;
f09603a2 1549
2e8d397e
AN		 1550 if (!sta->uploaded)
1551 continue;
1552
1553 /* AP-mode stations will be added later */
1554 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1555 continue;
1556
1557 for (state = IEEE80211_STA_NOTEXIST;
1558 state < sta->sta_state; state++)
1559 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1560 state + 1));
f2753ddb 1561 }
34e89507 1562 mutex_unlock(&local->sta_mtx);
f2753ddb 1563
2683d65b 1564 /* reconfigure tx conf */
54bcbc69
JB		 1565 if (hw->queues >= IEEE80211_NUM_ACS) {
1566 list_for_each_entry(sdata, &local->interfaces, list) {
1567 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1568 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1569 !ieee80211_sdata_running(sdata))
1570 continue;
f6f3def3 1571
54bcbc69
JB		 1572 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1573 drv_conf_tx(local, sdata, i,
1574 &sdata->tx_conf[i]);
1575 }
f6f3def3 1576 }
2683d65b 1577
f2753ddb
JB		 1578 /* reconfigure hardware */
1579 ieee80211_hw_config(local, ~0);
1580
f2753ddb 1581 ieee80211_configure_filter(local);
f2753ddb
JB		 1582
1583 /* Finally also reconfigure all the BSS information */
1584 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1585 u32 changed;
1586
9607e6b6 1587 if (!ieee80211_sdata_running(sdata))
f2753ddb 1588 continue;
ac8dd506
JB		 1589
1590 /* common change flags for all interface types */
1591 changed = BSS_CHANGED_ERP_CTS_PROT |
1592 BSS_CHANGED_ERP_PREAMBLE |
1593 BSS_CHANGED_ERP_SLOT |
1594 BSS_CHANGED_HT |
1595 BSS_CHANGED_BASIC_RATES |
1596 BSS_CHANGED_BEACON_INT |
1597 BSS_CHANGED_BSSID |
4ced3f74 1598 BSS_CHANGED_CQM |
55de47f6 1599 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1600 BSS_CHANGED_IDLE |
1601 BSS_CHANGED_TXPOWER;
ac8dd506 1602
f2753ddb
JB		 1603 switch (sdata->vif.type) {
1604 case NL80211_IFTYPE_STATION:
0d392e93 1605 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1606 BSS_CHANGED_ARP_FILTER |
1607 BSS_CHANGED_PS;
c65dd147 1608
989c6505
AB		 1609 /* Re-send beacon info report to the driver */
1610 if (sdata->u.mgd.have_beacon)
1611 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1612
8d61ffa5 1613 sdata_lock(sdata);
ac8dd506 1614 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1615 sdata_unlock(sdata);
ac8dd506 1616 break;
f2753ddb 1617 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1618 changed |= BSS_CHANGED_IBSS;
1619 /* fall through */
f2753ddb 1620 case NL80211_IFTYPE_AP:
339afbf4 1621 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1622
1041638f 1623 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1624 changed |= BSS_CHANGED_AP_PROBE_RESP;
1625
1041638f
JB		 1626 if (rcu_access_pointer(sdata->u.ap.beacon))
1627 drv_start_ap(local, sdata);
1628 }
1629
7827493b 1630 /* fall through */
f2753ddb 1631 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1632 if (sdata->vif.bss_conf.enable_beacon) {
1633 changed |= BSS_CHANGED_BEACON |
1634 BSS_CHANGED_BEACON_ENABLED;
1635 ieee80211_bss_info_change_notify(sdata, changed);
1636 }
f2753ddb
JB		 1637 break;
1638 case NL80211_IFTYPE_WDS:
1639 break;
1640 case NL80211_IFTYPE_AP_VLAN:
1641 case NL80211_IFTYPE_MONITOR:
1642 /* ignore virtual */
1643 break;
98104fde 1644 case NL80211_IFTYPE_P2P_DEVICE:
f142c6b9
JB		 1645 changed = BSS_CHANGED_IDLE;
1646 break;
f2753ddb 1647 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1648 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1649 case NL80211_IFTYPE_P2P_CLIENT:
1650 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1651 WARN_ON(1);
1652 break;
1653 }
1654 }
1655
8e1b23b9
ES		 1656 ieee80211_recalc_ps(local, -1);
1657
6e1b1b24
EP		 1658 /*
1659 * The sta might be in psm against the ap (e.g. because
1660 * this was the state before a hw restart), so we
1661 * explicitly send a null packet in order to make sure
1662 * it'll sync against the ap (and get out of psm).
1663 */
1664 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1665 list_for_each_entry(sdata, &local->interfaces, list) {
1666 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1667 continue;
20f544ee
JB		 1668 if (!sdata->u.mgd.associated)
1669 continue;
6e1b1b24
EP		 1670
1671 ieee80211_send_nullfunc(local, sdata, 0);
1672 }
1673 }
1674
2e8d397e
AN		 1675 /* APs are now beaconing, add back stations */
1676 mutex_lock(&local->sta_mtx);
1677 list_for_each_entry(sta, &local->sta_list, list) {
1678 enum ieee80211_sta_state state;
1679
1680 if (!sta->uploaded)
1681 continue;
1682
1683 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1684 continue;
1685
1686 for (state = IEEE80211_STA_NOTEXIST;
1687 state < sta->sta_state; state++)
1688 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1689 state + 1));
1690 }
1691 mutex_unlock(&local->sta_mtx);
1692
7b21aea0
ES		 1693 /* add back keys */
1694 list_for_each_entry(sdata, &local->interfaces, list)
1695 if (ieee80211_sdata_running(sdata))
1696 ieee80211_enable_keys(sdata);
1697
c6209488 1698 wake_up:
04800ada
AN		 1699 local->in_reconfig = false;
1700 barrier();
1701
3c3e21e7
JB		 1702 if (local->monitors == local->open_count && local->monitors > 0)
1703 ieee80211_add_virtual_monitor(local);
1704
2a419056
JB		 1705 /*
1706 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1707 * sessions can be established after a resume.
1708 *
1709 * Also tear down aggregation sessions since reconfiguring
1710 * them in a hardware restart scenario is not easily done
1711 * right now, and the hardware will have lost information
1712 * about the sessions, but we and the AP still think they
1713 * are active. This is really a workaround though.
1714 */
74e2bd1f 1715 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 1716 mutex_lock(&local->sta_mtx);
1717
1718 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 1719 ieee80211_sta_tear_down_BA_sessions(
1720 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 1721 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 1722 }
2a419056
JB		 1723
1724 mutex_unlock(&local->sta_mtx);
74e2bd1f 1725 }
74e2bd1f 1726
445ea4e8
JB		 1727 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1728 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
f2753ddb 1729
5bb644a0
JB		 1730 /*
1731 * If this is for hw restart things are still running.
1732 * We may want to change that later, however.
1733 */
8f21b0ad 1734 if (!local->suspended || reconfig_due_to_wowlan)
9214ad7f 1735 drv_restart_complete(local);
8f21b0ad
JB		 1736
1737 if (!local->suspended)
5bb644a0
JB		 1738 return 0;
1739
1740#ifdef CONFIG_PM
ceb99fe0 1741 /* first set suspended false, then resuming */
5bb644a0 1742 local->suspended = false;
ceb99fe0
JB		 1743 mb();
1744 local->resuming = false;
5bb644a0 1745
b8360ab8
JB		 1746 list_for_each_entry(sdata, &local->interfaces, list) {
1747 if (!ieee80211_sdata_running(sdata))
1748 continue;
1749 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1750 ieee80211_sta_restart(sdata);
1751 }
1752
26d59535 1753 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 1754#else
1755 WARN_ON(1);
1756#endif
f2753ddb
JB		 1757 return 0;
1758}
42935eca 1759
95acac61
JB		 1760void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1761{
1762 struct ieee80211_sub_if_data *sdata;
1763 struct ieee80211_local *local;
1764 struct ieee80211_key *key;
1765
1766 if (WARN_ON(!vif))
1767 return;
1768
1769 sdata = vif_to_sdata(vif);
1770 local = sdata->local;
1771
1772 if (WARN_ON(!local->resuming))
1773 return;
1774
1775 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1776 return;
1777
1778 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1779
1780 mutex_lock(&local->key_mtx);
1781 list_for_each_entry(key, &sdata->key_list, list)
1782 key->flags |= KEY_FLAG_TAINTED;
1783 mutex_unlock(&local->key_mtx);
1784}
1785EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1786
04ecd257 1787void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 1788{
04ecd257
JB		 1789 struct ieee80211_local *local = sdata->local;
1790 struct ieee80211_chanctx_conf *chanctx_conf;
1791 struct ieee80211_chanctx *chanctx;
025e6be2 1792
04ecd257 1793 mutex_lock(&local->chanctx_mtx);
0f78231b 1794
04ecd257
JB		 1795 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1796 lockdep_is_held(&local->chanctx_mtx));
0f78231b 1797
04ecd257 1798 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 1799 goto unlock;
0f78231b 1800
04ecd257
JB		 1801 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1802 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 1803 unlock:
04ecd257 1804 mutex_unlock(&local->chanctx_mtx);
0f78231b 1805}
8e664fb3
JB		 1806
1807static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1808{
1809 int i;
1810
1811 for (i = 0; i < n_ids; i++)
1812 if (ids[i] == id)
1813 return true;
1814 return false;
1815}
1816
1817/**
1818 * ieee80211_ie_split - split an IE buffer according to ordering
1819 *
1820 * @ies: the IE buffer
1821 * @ielen: the length of the IE buffer
1822 * @ids: an array with element IDs that are allowed before
1823 * the split
1824 * @n_ids: the size of the element ID array
1825 * @offset: offset where to start splitting in the buffer
1826 *
1827 * This function splits an IE buffer by updating the @offset
1828 * variable to point to the location where the buffer should be
1829 * split.
1830 *
1831 * It assumes that the given IE buffer is well-formed, this
1832 * has to be guaranteed by the caller!
1833 *
1834 * It also assumes that the IEs in the buffer are ordered
1835 * correctly, if not the result of using this function will not
1836 * be ordered correctly either, i.e. it does no reordering.
1837 *
1838 * The function returns the offset where the next part of the
1839 * buffer starts, which may be @ielen if the entire (remainder)
1840 * of the buffer should be used.
1841 */
1842size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1843 const u8 *ids, int n_ids, size_t offset)
1844{
1845 size_t pos = offset;
1846
1847 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1848 pos += 2 + ies[pos + 1];
1849
1850 return pos;
1851}
1852
1853size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1854{
1855 size_t pos = offset;
1856
1857 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1858 pos += 2 + ies[pos + 1];
1859
1860 return pos;
1861}
615f7b9b
MV		 1862
1863static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1864 int rssi_min_thold,
1865 int rssi_max_thold)
1866{
1867 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1868
1869 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1870 return;
1871
1872 /*
1873 * Scale up threshold values before storing it, as the RSSI averaging
1874 * algorithm uses a scaled up value as well. Change this scaling
1875 * factor if the RSSI averaging algorithm changes.
1876 */
1877 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1878 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1879}
1880
1881void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1882 int rssi_min_thold,
1883 int rssi_max_thold)
1884{
1885 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1886
1887 WARN_ON(rssi_min_thold == rssi_max_thold ||
1888 rssi_min_thold > rssi_max_thold);
1889
1890 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1891 rssi_max_thold);
1892}
1893EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1894
1895void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1896{
1897 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1898
1899 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1900}
1901EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 1902
ef96a842 1903u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 1904 u16 cap)
1905{
1906 __le16 tmp;
1907
1908 *pos++ = WLAN_EID_HT_CAPABILITY;
1909 *pos++ = sizeof(struct ieee80211_ht_cap);
1910 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1911
1912 /* capability flags */
1913 tmp = cpu_to_le16(cap);
1914 memcpy(pos, &tmp, sizeof(u16));
1915 pos += sizeof(u16);
1916
1917 /* AMPDU parameters */
ef96a842
BG		 1918 *pos++ = ht_cap->ampdu_factor |
1919 (ht_cap->ampdu_density <<
42e7aa77
AS		 1920 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1921
1922 /* MCS set */
ef96a842
BG		 1923 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1924 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 1925
1926 /* extended capabilities */
1927 pos += sizeof(__le16);
1928
1929 /* BF capabilities */
1930 pos += sizeof(__le32);
1931
1932 /* antenna selection */
1933 pos += sizeof(u8);
1934
1935 return pos;
1936}
1937
ba0afa2f 1938u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 1939 u32 cap)
ba0afa2f
MP		 1940{
1941 __le32 tmp;
1942
1943 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 1944 *pos++ = sizeof(struct ieee80211_vht_cap);
1945 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 1946
1947 /* capability flags */
1948 tmp = cpu_to_le32(cap);
1949 memcpy(pos, &tmp, sizeof(u32));
1950 pos += sizeof(u32);
1951
1952 /* VHT MCS set */
1953 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1954 pos += sizeof(vht_cap->vht_mcs);
1955
1956 return pos;
1957}
1958
074d46d1 1959u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 1960 const struct cfg80211_chan_def *chandef,
431e3154 1961 u16 prot_mode)
42e7aa77 1962{
074d46d1 1963 struct ieee80211_ht_operation *ht_oper;
42e7aa77 1964 /* Build HT Information */
074d46d1
JB		 1965 *pos++ = WLAN_EID_HT_OPERATION;
1966 *pos++ = sizeof(struct ieee80211_ht_operation);
1967 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 1968 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1969 chandef->chan->center_freq);
1970 switch (chandef->width) {
1971 case NL80211_CHAN_WIDTH_160:
1972 case NL80211_CHAN_WIDTH_80P80:
1973 case NL80211_CHAN_WIDTH_80:
1974 case NL80211_CHAN_WIDTH_40:
1975 if (chandef->center_freq1 > chandef->chan->center_freq)
1976 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1977 else
1978 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 1979 break;
42e7aa77 1980 default:
074d46d1 1981 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 1982 break;
1983 }
aee286c2 1984 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 1985 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1986 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 1987 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 1988
431e3154 1989 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 1990 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 1991
1992 /* It seems that Basic MCS set and Supported MCS set
1993 are identical for the first 10 bytes */
074d46d1
JB		 1994 memset(&ht_oper->basic_set, 0, 16);
1995 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 1996
074d46d1 1997 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 1998}
1999
4bf88530 2000void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2001 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2002 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2003{
2004 enum nl80211_channel_type channel_type;
2005
4bf88530
JB		 2006 if (!ht_oper) {
2007 cfg80211_chandef_create(chandef, control_chan,
2008 NL80211_CHAN_NO_HT);
2009 return;
2010 }
42e7aa77 2011
074d46d1 2012 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2013 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2014 channel_type = NL80211_CHAN_HT20;
2015 break;
2016 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2017 channel_type = NL80211_CHAN_HT40PLUS;
2018 break;
2019 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2020 channel_type = NL80211_CHAN_HT40MINUS;
2021 break;
2022 default:
2023 channel_type = NL80211_CHAN_NO_HT;
2024 }
2025
4bf88530 2026 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2027}
2028
2103dec1
SW		 2029int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2030 const struct ieee80211_supported_band *sband,
2031 const u8 *srates, int srates_len, u32 *rates)
2032{
2033 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2034 int shift = ieee80211_chandef_get_shift(chandef);
2035 struct ieee80211_rate *br;
2036 int brate, rate, i, j, count = 0;
2037
2038 *rates = 0;
2039
2040 for (i = 0; i < srates_len; i++) {
2041 rate = srates[i] & 0x7f;
2042
2043 for (j = 0; j < sband->n_bitrates; j++) {
2044 br = &sband->bitrates[j];
2045 if ((rate_flags & br->flags) != rate_flags)
2046 continue;
2047
2048 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2049 if (brate == rate) {
2050 *rates |= BIT(j);
2051 count++;
2052 break;
2053 }
2054 }
2055 }
2056 return count;
2057}
2058
fc8a7321 2059int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2060 struct sk_buff *skb, bool need_basic,
2061 enum ieee80211_band band)
768db343 2062{
768db343
AN		 2063 struct ieee80211_local *local = sdata->local;
2064 struct ieee80211_supported_band *sband;
2103dec1 2065 int rate, shift;
768db343 2066 u8 i, rates, *pos;
fc8a7321 2067 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2068 u32 rate_flags;
768db343 2069
2103dec1
SW		 2070 shift = ieee80211_vif_get_shift(&sdata->vif);
2071 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2072 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2073 rates = 0;
2074 for (i = 0; i < sband->n_bitrates; i++) {
2075 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2076 continue;
2077 rates++;
2078 }
768db343
AN		 2079 if (rates > 8)
2080 rates = 8;
2081
2082 if (skb_tailroom(skb) < rates + 2)
2083 return -ENOMEM;
2084
2085 pos = skb_put(skb, rates + 2);
2086 *pos++ = WLAN_EID_SUPP_RATES;
2087 *pos++ = rates;
2088 for (i = 0; i < rates; i++) {
657c3e0c 2089 u8 basic = 0;
2103dec1
SW		 2090 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2091 continue;
2092
657c3e0c
AN		 2093 if (need_basic && basic_rates & BIT(i))
2094 basic = 0x80;
768db343 2095 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2096 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2097 5 * (1 << shift));
2098 *pos++ = basic | (u8) rate;
768db343
AN		 2099 }
2100
2101 return 0;
2102}
2103
fc8a7321 2104int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2105 struct sk_buff *skb, bool need_basic,
2106 enum ieee80211_band band)
768db343 2107{
768db343
AN		 2108 struct ieee80211_local *local = sdata->local;
2109 struct ieee80211_supported_band *sband;
cc63ec76 2110 int rate, shift;
768db343 2111 u8 i, exrates, *pos;
fc8a7321 2112 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2113 u32 rate_flags;
2114
2115 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2116 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2117
6b77863b 2118 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2119 exrates = 0;
2120 for (i = 0; i < sband->n_bitrates; i++) {
2121 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2122 continue;
2123 exrates++;
2124 }
2125
768db343
AN		 2126 if (exrates > 8)
2127 exrates -= 8;
2128 else
2129 exrates = 0;
2130
2131 if (skb_tailroom(skb) < exrates + 2)
2132 return -ENOMEM;
2133
2134 if (exrates) {
2135 pos = skb_put(skb, exrates + 2);
2136 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2137 *pos++ = exrates;
2138 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2139 u8 basic = 0;
2103dec1
SW		 2140 if ((rate_flags & sband->bitrates[i].flags)
2141 != rate_flags)
2142 continue;
657c3e0c
AN		 2143 if (need_basic && basic_rates & BIT(i))
2144 basic = 0x80;
2103dec1
SW		 2145 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2146 5 * (1 << shift));
2147 *pos++ = basic | (u8) rate;
768db343
AN		 2148 }
2149 }
2150 return 0;
2151}
1dae27f8
WYG		 2152
2153int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2154{
2155 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2157
be6bcabc
WYG		 2158 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2159 /* non-managed type inferfaces */
2160 return 0;
2161 }
3a7bba64 2162 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2163}
0d8a0a17 2164EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2165
2166u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2167{
2168 if (!mcs)
2169 return 1;
2170
2171 /* TODO: consider rx_highest */
2172
2173 if (mcs->rx_mask[3])
2174 return 4;
2175 if (mcs->rx_mask[2])
2176 return 3;
2177 if (mcs->rx_mask[1])
2178 return 2;
2179 return 1;
2180}
f4bda337
TP		 2181
2182/**
2183 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2184 * @local: mac80211 hw info struct
2185 * @status: RX status
2186 * @mpdu_len: total MPDU length (including FCS)
2187 * @mpdu_offset: offset into MPDU to calculate timestamp at
2188 *
2189 * This function calculates the RX timestamp at the given MPDU offset, taking
2190 * into account what the RX timestamp was. An offset of 0 will just normalize
2191 * the timestamp to TSF at beginning of MPDU reception.
2192 */
2193u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2194 struct ieee80211_rx_status *status,
2195 unsigned int mpdu_len,
2196 unsigned int mpdu_offset)
2197{
2198 u64 ts = status->mactime;
2199 struct rate_info ri;
2200 u16 rate;
2201
2202 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2203 return 0;
2204
2205 memset(&ri, 0, sizeof(ri));
2206
2207 /* Fill cfg80211 rate info */
2208 if (status->flag & RX_FLAG_HT) {
2209 ri.mcs = status->rate_idx;
2210 ri.flags |= RATE_INFO_FLAGS_MCS;
2211 if (status->flag & RX_FLAG_40MHZ)
2212 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2213 if (status->flag & RX_FLAG_SHORT_GI)
2214 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2215 } else if (status->flag & RX_FLAG_VHT) {
2216 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2217 ri.mcs = status->rate_idx;
2218 ri.nss = status->vht_nss;
2219 if (status->flag & RX_FLAG_40MHZ)
2220 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2221 if (status->flag & RX_FLAG_80MHZ)
2222 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2223 if (status->flag & RX_FLAG_80P80MHZ)
2224 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2225 if (status->flag & RX_FLAG_160MHZ)
2226 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2227 if (status->flag & RX_FLAG_SHORT_GI)
2228 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2229 } else {
2230 struct ieee80211_supported_band *sband;
2103dec1
SW		 2231 int shift = 0;
2232 int bitrate;
2233
2234 if (status->flag & RX_FLAG_10MHZ)
2235 shift = 1;
2236 if (status->flag & RX_FLAG_5MHZ)
2237 shift = 2;
f4bda337
TP		 2238
2239 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2240 bitrate = sband->bitrates[status->rate_idx].bitrate;
2241 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2242 }
2243
2244 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2245 if (WARN_ONCE(!rate,
2246 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2247 status->flag, status->rate_idx, status->vht_nss))
2248 return 0;
f4bda337
TP		 2249
2250 /* rewind from end of MPDU */
2251 if (status->flag & RX_FLAG_MACTIME_END)
2252 ts -= mpdu_len * 8 * 10 / rate;
2253
2254 ts += mpdu_offset * 8 * 10 / rate;
2255
2256 return ts;
2257}
164eb02d
SW		 2258
2259void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2260{
2261 struct ieee80211_sub_if_data *sdata;
2262
2263 mutex_lock(&local->iflist_mtx);
2264 list_for_each_entry(sdata, &local->interfaces, list) {
2265 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2266
2267 if (sdata->wdev.cac_started) {
2268 ieee80211_vif_release_channel(sdata);
2269 cfg80211_cac_event(sdata->dev,
2270 NL80211_RADAR_CAC_ABORTED,
2271 GFP_KERNEL);
2272 }
2273 }
2274 mutex_unlock(&local->iflist_mtx);
2275}
2276
2277void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2278{
2279 struct ieee80211_local *local =
2280 container_of(work, struct ieee80211_local, radar_detected_work);
2281 struct cfg80211_chan_def chandef;
2282
2283 ieee80211_dfs_cac_cancel(local);
2284
2285 if (local->use_chanctx)
2286 /* currently not handled */
2287 WARN_ON(1);
2288 else {
675a0b04 2289 chandef = local->hw.conf.chandef;
164eb02d
SW		 2290 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2291 }
2292}
2293
2294void ieee80211_radar_detected(struct ieee80211_hw *hw)
2295{
2296 struct ieee80211_local *local = hw_to_local(hw);
2297
2298 trace_api_radar_detected(local);
2299
2300 ieee80211_queue_work(hw, &local->radar_detected_work);
2301}
2302EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2303
2304u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2305{
2306 u32 ret;
2307 int tmp;
2308
2309 switch (c->width) {
2310 case NL80211_CHAN_WIDTH_20:
2311 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2312 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2313 break;
2314 case NL80211_CHAN_WIDTH_40:
2315 c->width = NL80211_CHAN_WIDTH_20;
2316 c->center_freq1 = c->chan->center_freq;
2317 ret = IEEE80211_STA_DISABLE_40MHZ |
2318 IEEE80211_STA_DISABLE_VHT;
2319 break;
2320 case NL80211_CHAN_WIDTH_80:
2321 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2322 /* n_P40 */
2323 tmp /= 2;
2324 /* freq_P40 */
2325 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2326 c->width = NL80211_CHAN_WIDTH_40;
2327 ret = IEEE80211_STA_DISABLE_VHT;
2328 break;
2329 case NL80211_CHAN_WIDTH_80P80:
2330 c->center_freq2 = 0;
2331 c->width = NL80211_CHAN_WIDTH_80;
2332 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2333 IEEE80211_STA_DISABLE_160MHZ;
2334 break;
2335 case NL80211_CHAN_WIDTH_160:
2336 /* n_P20 */
2337 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2338 /* n_P80 */
2339 tmp /= 4;
2340 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2341 c->width = NL80211_CHAN_WIDTH_80;
2342 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2343 IEEE80211_STA_DISABLE_160MHZ;
2344 break;
2345 default:
2346 case NL80211_CHAN_WIDTH_20_NOHT:
2347 WARN_ON_ONCE(1);
2348 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2349 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2350 break;
2351 case NL80211_CHAN_WIDTH_5:
2352 case NL80211_CHAN_WIDTH_10:
2353 WARN_ON_ONCE(1);
2354 /* keep c->width */
2355 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2356 break;
2357 }
2358
2359 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2360
2361 return ret;
2362}
687da132
EG		 2363
2364/*
2365 * Returns true if smps_mode_new is strictly more restrictive than
2366 * smps_mode_old.
2367 */
2368bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2369 enum ieee80211_smps_mode smps_mode_new)
2370{
2371 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2372 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2373 return false;
2374
2375 switch (smps_mode_old) {
2376 case IEEE80211_SMPS_STATIC:
2377 return false;
2378 case IEEE80211_SMPS_DYNAMIC:
2379 return smps_mode_new == IEEE80211_SMPS_STATIC;
2380 case IEEE80211_SMPS_OFF:
2381 return smps_mode_new != IEEE80211_SMPS_OFF;
2382 default:
2383 WARN_ON(1);
2384 }
2385
2386 return false;
2387}
c6da674a
CYY		 2388
2389int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2390 struct cfg80211_csa_settings *csa_settings)
2391{
2392 struct sk_buff *skb;
2393 struct ieee80211_mgmt *mgmt;
2394 struct ieee80211_local *local = sdata->local;
2395 int freq;
2396 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2397 sizeof(mgmt->u.action.u.chan_switch);
2398 u8 *pos;
2399
2400 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2401 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2402 return -EOPNOTSUPP;
2403
2404 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2405 5 + /* channel switch announcement element */
2406 3 + /* secondary channel offset element */
2407 8); /* mesh channel switch parameters element */
2408 if (!skb)
2409 return -ENOMEM;
2410
2411 skb_reserve(skb, local->tx_headroom);
2412 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2413 memset(mgmt, 0, hdr_len);
2414 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2415 IEEE80211_STYPE_ACTION);
2416
2417 eth_broadcast_addr(mgmt->da);
2418 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2419 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2420 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2421 } else {
2422 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2423 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2424 }
2425 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2426 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2427 pos = skb_put(skb, 5);
2428 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2429 *pos++ = 3; /* IE length */
2430 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2431 freq = csa_settings->chandef.chan->center_freq;
2432 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2433 *pos++ = csa_settings->count; /* count */
2434
2435 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2436 enum nl80211_channel_type ch_type;
2437
2438 skb_put(skb, 3);
2439 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2440 *pos++ = 1; /* IE length */
2441 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2442 if (ch_type == NL80211_CHAN_HT40PLUS)
2443 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2444 else
2445 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2446 }
2447
2448 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2449 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2450 __le16 pre_value;
2451
2452 skb_put(skb, 8);
2453 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2454 *pos++ = 6; /* IE length */
2455 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2456 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2457 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2458 *pos++ |= csa_settings->block_tx ?
2459 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2460 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2461 pos += 2;
2462 if (!ifmsh->pre_value)
2463 ifmsh->pre_value = 1;
2464 else
2465 ifmsh->pre_value++;
2466 pre_value = cpu_to_le16(ifmsh->pre_value);
2467 memcpy(pos, &pre_value, 2); /* Precedence Value */
2468 pos += 2;
2469 ifmsh->chsw_init = true;
2470 }
2471
2472 ieee80211_tx_skb(sdata, skb);
2473 return 0;
2474}
Linux kernel - Deliverables
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