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Merge tag 'wireless-drivers-for-davem-2015-06-01' of git://git.kernel.org/pub/scm...
[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>
d98ad83e 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
c2d1560a
JB		 7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15#include <net/mac80211.h>
16#include <linux/netdevice.h>
bc3b2d7f 17#include <linux/export.h>
c2d1560a
JB		 18#include <linux/types.h>
19#include <linux/slab.h>
20#include <linux/skbuff.h>
21#include <linux/etherdevice.h>
22#include <linux/if_arp.h>
c2d1560a 23#include <linux/bitmap.h>
dd76986b 24#include <linux/crc32.h>
881d966b 25#include <net/net_namespace.h>
c2d1560a 26#include <net/cfg80211.h>
dabeb344 27#include <net/rtnetlink.h>
c2d1560a
JB		 28
29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7 31#include "rate.h"
ee385855 32#include "mesh.h"
c2d1560a 33#include "wme.h"
f2753ddb 34#include "led.h"
fffd0934 35#include "wep.h"
c2d1560a
JB		 36
37/* privid for wiphys to determine whether they belong to us or not */
8a47cea7 38const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
c2d1560a 39
9a95371a
LR		 40struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41{
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47}
48EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
c2d1560a 49
71364716 50u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
05c914fe 51 enum nl80211_iftype type)
c2d1560a 52{
a494bb1c 53 __le16 fc = hdr->frame_control;
c2d1560a 54
98f0b0a3
RR		 55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
c2d1560a
JB		 57 return NULL;
58
a494bb1c 59 if (ieee80211_is_data(fc)) {
98f0b0a3
RR		 60 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
a494bb1c
HH		 62
63 if (ieee80211_has_a4(fc))
c2d1560a 64 return NULL;
a494bb1c
HH		 65 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
c2d1560a 68 return hdr->addr2;
a494bb1c
HH		 69
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
98f0b0a3
RR		 74 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
c2d1560a 76 return hdr->addr3;
a494bb1c
HH		 77 }
78
79 if (ieee80211_is_ctl(fc)) {
f359d3fe 80 if (ieee80211_is_pspoll(fc))
c2d1560a 81 return hdr->addr1;
a494bb1c
HH		 82
83 if (ieee80211_is_back_req(fc)) {
71364716 84 switch (type) {
05c914fe 85 case NL80211_IFTYPE_STATION:
71364716 86 return hdr->addr2;
05c914fe
JB		 87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
71364716
RR		 89 return hdr->addr1;
90 default:
a494bb1c 91 break; /* fall through to the return */
71364716
RR		 92 }
93 }
c2d1560a
JB		 94 }
95
96 return NULL;
97}
98
5cf121c3 99void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
c2d1560a 100{
252b86c4 101 struct sk_buff *skb;
2de8e0d9
JB		 102 struct ieee80211_hdr *hdr;
103
252b86c4 104 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9
JB		 105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
252b86c4 107 }
c2d1560a
JB		 108}
109
4ee73f33 110int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
438b61b7
SW		 111 int rate, int erp, int short_preamble,
112 int shift)
c2d1560a
JB		 113{
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
438b61b7
SW		 123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
c2d1560a
JB		 126 */
127
4ee73f33 128 if (band == IEEE80211_BAND_5GHZ || erp) {
c2d1560a
JB		 129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
438b61b7 138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
c2d1560a
JB		 139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
c2d1560a 142 dur = 16; /* SIFS + signal ext */
438b61b7
SW		 143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
438b61b7
SW		 145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
2103dec1
SW		 151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
c2d1560a
JB		 157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175}
176
177/* Exported duration function for driver use */
32bfd35d
JB		 178__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
4ee73f33 180 enum ieee80211_band band,
8318d78a
JB		 181 size_t frame_len,
182 struct ieee80211_rate *rate)
c2d1560a 183{
25d834e1 184 struct ieee80211_sub_if_data *sdata;
c2d1560a 185 u16 dur;
438b61b7 186 int erp, shift = 0;
25d834e1 187 bool short_preamble = false;
c2d1560a 188
8318d78a 189 erp = 0;
25d834e1
JB		 190 if (vif) {
191 sdata = vif_to_sdata(vif);
bda3933a 192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 195 shift = ieee80211_vif_get_shift(vif);
25d834e1 196 }
8318d78a 197
4ee73f33 198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
438b61b7 199 short_preamble, shift);
c2d1560a
JB		 200
201 return cpu_to_le16(dur);
202}
203EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
32bfd35d
JB		 205__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
e039fa4a 207 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 208{
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
25d834e1 211 struct ieee80211_sub_if_data *sdata;
471b3efd 212 bool short_preamble;
2103dec1 213 int erp, shift = 0, bitrate;
c2d1560a 214 u16 dur;
2e92e6f2
JB		 215 struct ieee80211_supported_band *sband;
216
4ee73f33 217 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 218
25d834e1 219 short_preamble = false;
7e9ed188 220
e039fa4a 221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a
JB		 222
223 erp = 0;
25d834e1
JB		 224 if (vif) {
225 sdata = vif_to_sdata(vif);
bda3933a 226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 229 shift = ieee80211_vif_get_shift(vif);
25d834e1 230 }
c2d1560a 231
2103dec1
SW		 232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
c2d1560a 234 /* CTS duration */
2103dec1 235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 236 erp, short_preamble, shift);
c2d1560a 237 /* Data frame duration */
2103dec1 238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 239 erp, short_preamble, shift);
c2d1560a 240 /* ACK duration */
2103dec1 241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 242 erp, short_preamble, shift);
c2d1560a
JB		 243
244 return cpu_to_le16(dur);
245}
246EXPORT_SYMBOL(ieee80211_rts_duration);
247
32bfd35d
JB		 248__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
c2d1560a 250 size_t frame_len,
e039fa4a 251 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 252{
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
25d834e1 255 struct ieee80211_sub_if_data *sdata;
471b3efd 256 bool short_preamble;
2103dec1 257 int erp, shift = 0, bitrate;
c2d1560a 258 u16 dur;
2e92e6f2
JB		 259 struct ieee80211_supported_band *sband;
260
4ee73f33 261 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 262
25d834e1 263 short_preamble = false;
7e9ed188 264
e039fa4a 265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a 266 erp = 0;
25d834e1
JB		 267 if (vif) {
268 sdata = vif_to_sdata(vif);
bda3933a 269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 272 shift = ieee80211_vif_get_shift(vif);
25d834e1 273 }
c2d1560a 274
2103dec1
SW		 275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
c2d1560a 277 /* Data frame duration */
2103dec1 278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 279 erp, short_preamble, shift);
e039fa4a 280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
c2d1560a 281 /* ACK duration */
2103dec1 282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 283 erp, short_preamble, shift);
c2d1560a
JB		 284 }
285
286 return cpu_to_le16(dur);
287}
288EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
3a25a8c8
JB		 290void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291{
292 struct ieee80211_sub_if_data *sdata;
a6f38ac3
JB		 293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
3a25a8c8
JB		 297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
f142c6b9
JB		 301 if (!sdata->dev)
302 continue;
303
3a25a8c8
JB		 304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
a6f38ac3 308 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 309 int ac_queue = sdata->vif.hw_queue[ac];
310
ba8c3d6f
FF		 311 if (local->ops->wake_tx_queue &&
312 (atomic_read(&sdata->txqs_len[ac]) >
313 local->hw.txq_ac_max_pending))
314 continue;
315
3a25a8c8
JB		 316 if (ac_queue == queue ||
317 (sdata->vif.cab_queue == queue &&
318 local->queue_stop_reasons[ac_queue] == 0 &&
319 skb_queue_empty(&local->pending[ac_queue])))
320 netif_wake_subqueue(sdata->dev, ac);
321 }
322 }
323}
324
ce7c9111 325static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 326 enum queue_stop_reason reason,
327 bool refcounted)
c2d1560a
JB		 328{
329 struct ieee80211_local *local = hw_to_local(hw);
330
b5878a2d
JB		 331 trace_wake_queue(local, queue, reason);
332
e4e72fb4
JB		 333 if (WARN_ON(queue >= hw->queues))
334 return;
ce7c9111 335
ada15125
JB		 336 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
337 return;
338
cca07b00
LC		 339 if (!refcounted)
340 local->q_stop_reasons[queue][reason] = 0;
341 else
342 local->q_stop_reasons[queue][reason]--;
343
344 if (local->q_stop_reasons[queue][reason] == 0)
345 __clear_bit(reason, &local->queue_stop_reasons[queue]);
96f5e66e
JB		 346
347 if (local->queue_stop_reasons[queue] != 0)
348 /* someone still has this queue stopped */
349 return;
350
7236fe29
JB		 351 if (skb_queue_empty(&local->pending[queue])) {
352 rcu_read_lock();
3a25a8c8 353 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 354 rcu_read_unlock();
355 } else
3b8d81e0 356 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 357}
ce7c9111 358
96f5e66e 359void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 360 enum queue_stop_reason reason,
361 bool refcounted)
ce7c9111
KV		 362{
363 struct ieee80211_local *local = hw_to_local(hw);
364 unsigned long flags;
365
366 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 367 __ieee80211_wake_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 368 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
369}
370
371void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
372{
373 ieee80211_wake_queue_by_reason(hw, queue,
cca07b00
LC		 374 IEEE80211_QUEUE_STOP_REASON_DRIVER,
375 false);
ce7c9111 376}
c2d1560a
JB		 377EXPORT_SYMBOL(ieee80211_wake_queue);
378
ce7c9111 379static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 380 enum queue_stop_reason reason,
381 bool refcounted)
c2d1560a
JB		 382{
383 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 384 struct ieee80211_sub_if_data *sdata;
a6f38ac3 385 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 386
b5878a2d
JB		 387 trace_stop_queue(local, queue, reason);
388
e4e72fb4
JB		 389 if (WARN_ON(queue >= hw->queues))
390 return;
96f5e66e 391
cca07b00
LC		 392 if (!refcounted)
393 local->q_stop_reasons[queue][reason] = 1;
394 else
395 local->q_stop_reasons[queue][reason]++;
ada15125 396
cca07b00
LC		 397 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
398 return;
cf0277e7 399
a6f38ac3
JB		 400 if (local->hw.queues < IEEE80211_NUM_ACS)
401 n_acs = 1;
402
cf0277e7 403 rcu_read_lock();
3a25a8c8
JB		 404 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
405 int ac;
406
f142c6b9
JB		 407 if (!sdata->dev)
408 continue;
409
a6f38ac3 410 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 411 if (sdata->vif.hw_queue[ac] == queue ||
412 sdata->vif.cab_queue == queue)
413 netif_stop_subqueue(sdata->dev, ac);
414 }
415 }
cf0277e7 416 rcu_read_unlock();
c2d1560a 417}
ce7c9111 418
96f5e66e 419void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 420 enum queue_stop_reason reason,
421 bool refcounted)
ce7c9111
KV		 422{
423 struct ieee80211_local *local = hw_to_local(hw);
424 unsigned long flags;
425
426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 427 __ieee80211_stop_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 428 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
429}
430
431void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
432{
433 ieee80211_stop_queue_by_reason(hw, queue,
cca07b00
LC		 434 IEEE80211_QUEUE_STOP_REASON_DRIVER,
435 false);
ce7c9111 436}
c2d1560a
JB		 437EXPORT_SYMBOL(ieee80211_stop_queue);
438
8f77f384
JB		 439void ieee80211_add_pending_skb(struct ieee80211_local *local,
440 struct sk_buff *skb)
441{
442 struct ieee80211_hw *hw = &local->hw;
443 unsigned long flags;
a7bc376c 444 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 445 int queue = info->hw_queue;
a7bc376c
JB		 446
447 if (WARN_ON(!info->control.vif)) {
d4fa14cd 448 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 449 return;
450 }
8f77f384
JB		 451
452 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00
LC		 453 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
454 false);
3b8d81e0 455 __skb_queue_tail(&local->pending[queue], skb);
cca07b00
LC		 456 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
457 false);
8f77f384
JB		 458 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
459}
460
e3685e03
JB		 461void ieee80211_add_pending_skbs(struct ieee80211_local *local,
462 struct sk_buff_head *skbs)
8f77f384
JB		 463{
464 struct ieee80211_hw *hw = &local->hw;
465 struct sk_buff *skb;
466 unsigned long flags;
b0b97a8a 467 int queue, i;
8f77f384
JB		 468
469 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 470 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 471 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
472
473 if (WARN_ON(!info->control.vif)) {
d4fa14cd 474 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 475 continue;
476 }
477
3a25a8c8 478 queue = info->hw_queue;
4644ae89
JB		 479
480 __ieee80211_stop_queue(hw, queue,
cca07b00
LC		 481 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
482 false);
4644ae89 483
3b8d81e0 484 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 485 }
486
3b8d81e0 487 for (i = 0; i < hw->queues; i++)
8f77f384 488 __ieee80211_wake_queue(hw, i,
cca07b00
LC		 489 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
490 false);
8f77f384 491 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 492}
493
ce7c9111 494void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 495 unsigned long queues,
cca07b00
LC		 496 enum queue_stop_reason reason,
497 bool refcounted)
c2d1560a 498{
ce7c9111
KV		 499 struct ieee80211_local *local = hw_to_local(hw);
500 unsigned long flags;
c2d1560a
JB		 501 int i;
502
ce7c9111
KV		 503 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
504
445ea4e8 505 for_each_set_bit(i, &queues, hw->queues)
cca07b00 506 __ieee80211_stop_queue(hw, i, reason, refcounted);
ce7c9111
KV		 507
508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
509}
510
511void ieee80211_stop_queues(struct ieee80211_hw *hw)
512{
445ea4e8 513 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 514 IEEE80211_QUEUE_STOP_REASON_DRIVER,
515 false);
c2d1560a
JB		 516}
517EXPORT_SYMBOL(ieee80211_stop_queues);
518
92ab8535
TW		 519int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
520{
521 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 522 unsigned long flags;
523 int ret;
96f5e66e 524
e4e72fb4
JB		 525 if (WARN_ON(queue >= hw->queues))
526 return true;
96f5e66e 527
3b8d81e0 528 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 529 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
530 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 531 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
532 return ret;
92ab8535
TW		 533}
534EXPORT_SYMBOL(ieee80211_queue_stopped);
535
ce7c9111 536void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 537 unsigned long queues,
cca07b00
LC		 538 enum queue_stop_reason reason,
539 bool refcounted)
c2d1560a 540{
ce7c9111
KV		 541 struct ieee80211_local *local = hw_to_local(hw);
542 unsigned long flags;
c2d1560a
JB		 543 int i;
544
ce7c9111
KV		 545 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
546
445ea4e8 547 for_each_set_bit(i, &queues, hw->queues)
cca07b00 548 __ieee80211_wake_queue(hw, i, reason, refcounted);
ce7c9111
KV		 549
550 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
551}
552
553void ieee80211_wake_queues(struct ieee80211_hw *hw)
554{
445ea4e8 555 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 556 IEEE80211_QUEUE_STOP_REASON_DRIVER,
557 false);
c2d1560a
JB		 558}
559EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 560
26da23b6
LC		 561static unsigned int
562ieee80211_get_vif_queues(struct ieee80211_local *local,
563 struct ieee80211_sub_if_data *sdata)
39ecc01d 564{
26da23b6 565 unsigned int queues;
39ecc01d
JB		 566
567 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
568 int ac;
569
570 queues = 0;
571
572 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
573 queues |= BIT(sdata->vif.hw_queue[ac]);
574 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
575 queues |= BIT(sdata->vif.cab_queue);
576 } else {
577 /* all queues */
578 queues = BIT(local->hw.queues) - 1;
579 }
580
26da23b6
LC		 581 return queues;
582}
583
4f9610d5
LK		 584void __ieee80211_flush_queues(struct ieee80211_local *local,
585 struct ieee80211_sub_if_data *sdata,
3b24f4c6 586 unsigned int queues, bool drop)
26da23b6 587{
26da23b6
LC		 588 if (!local->ops->flush)
589 return;
590
4f9610d5
LK		 591 /*
592 * If no queue was set, or if the HW doesn't support
593 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
594 */
595 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
596 queues = ieee80211_get_vif_queues(local, sdata);
26da23b6 597
59f48fe2 598 ieee80211_stop_queues_by_reason(&local->hw, queues,
cca07b00
LC		 599 IEEE80211_QUEUE_STOP_REASON_FLUSH,
600 false);
445ea4e8 601
3b24f4c6 602 drv_flush(local, sdata, queues, drop);
445ea4e8 603
59f48fe2 604 ieee80211_wake_queues_by_reason(&local->hw, queues,
cca07b00
LC		 605 IEEE80211_QUEUE_STOP_REASON_FLUSH,
606 false);
39ecc01d
JB		 607}
608
4f9610d5 609void ieee80211_flush_queues(struct ieee80211_local *local,
3b24f4c6 610 struct ieee80211_sub_if_data *sdata, bool drop)
4f9610d5 611{
3b24f4c6 612 __ieee80211_flush_queues(local, sdata, 0, drop);
4f9610d5
LK		 613}
614
26da23b6
LC		 615void ieee80211_stop_vif_queues(struct ieee80211_local *local,
616 struct ieee80211_sub_if_data *sdata,
617 enum queue_stop_reason reason)
618{
619 ieee80211_stop_queues_by_reason(&local->hw,
620 ieee80211_get_vif_queues(local, sdata),
621 reason, true);
622}
623
624void ieee80211_wake_vif_queues(struct ieee80211_local *local,
625 struct ieee80211_sub_if_data *sdata,
626 enum queue_stop_reason reason)
627{
628 ieee80211_wake_queues_by_reason(&local->hw,
629 ieee80211_get_vif_queues(local, sdata),
630 reason, true);
631}
632
3384d757
AN		 633static void __iterate_interfaces(struct ieee80211_local *local,
634 u32 iter_flags,
635 void (*iterator)(void *data, u8 *mac,
636 struct ieee80211_vif *vif),
637 void *data)
dabeb344 638{
dabeb344 639 struct ieee80211_sub_if_data *sdata;
3384d757 640 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
dabeb344 641
c7c71066 642 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 643 switch (sdata->vif.type) {
05c914fe 644 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 645 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
646 continue;
647 break;
05c914fe 648 case NL80211_IFTYPE_AP_VLAN:
2f561feb 649 continue;
2ca27bcf 650 default:
2f561feb
ID		 651 break;
652 }
8b2c9824 653 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
3384d757 654 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
8b2c9824 655 continue;
3384d757 656 if (ieee80211_sdata_running(sdata) || !active_only)
47846c9b 657 iterator(data, sdata->vif.addr,
2f561feb
ID		 658 &sdata->vif);
659 }
660
c7c71066
JB		 661 sdata = rcu_dereference_check(local->monitor_sdata,
662 lockdep_is_held(&local->iflist_mtx) ||
663 lockdep_rtnl_is_held());
8b2c9824 664 if (sdata &&
3384d757 665 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
8b2c9824 666 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 667 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 668}
685fb72b 669
3384d757 670void ieee80211_iterate_interfaces(
c7c71066
JB		 671 struct ieee80211_hw *hw, u32 iter_flags,
672 void (*iterator)(void *data, u8 *mac,
673 struct ieee80211_vif *vif),
674 void *data)
675{
676 struct ieee80211_local *local = hw_to_local(hw);
677
678 mutex_lock(&local->iflist_mtx);
3384d757 679 __iterate_interfaces(local, iter_flags, iterator, data);
c771c9d8 680 mutex_unlock(&local->iflist_mtx);
2f561feb 681}
3384d757 682EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
2f561feb
ID		 683
684void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 685 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 686 void (*iterator)(void *data, u8 *mac,
687 struct ieee80211_vif *vif),
688 void *data)
689{
690 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 691
e38bad47 692 rcu_read_lock();
3384d757
AN		 693 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
694 iterator, data);
c7c71066
JB		 695 rcu_read_unlock();
696}
697EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 698
c7c71066
JB		 699void ieee80211_iterate_active_interfaces_rtnl(
700 struct ieee80211_hw *hw, u32 iter_flags,
701 void (*iterator)(void *data, u8 *mac,
702 struct ieee80211_vif *vif),
703 void *data)
704{
705 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 706
c7c71066 707 ASSERT_RTNL();
685fb72b 708
3384d757
AN		 709 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
710 iterator, data);
dabeb344 711}
c7c71066 712EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 713
0fc1e049
AN		 714static void __iterate_stations(struct ieee80211_local *local,
715 void (*iterator)(void *data,
716 struct ieee80211_sta *sta),
717 void *data)
718{
719 struct sta_info *sta;
720
721 list_for_each_entry_rcu(sta, &local->sta_list, list) {
722 if (!sta->uploaded)
723 continue;
724
725 iterator(data, &sta->sta);
726 }
727}
728
729void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
730 void (*iterator)(void *data,
731 struct ieee80211_sta *sta),
732 void *data)
733{
734 struct ieee80211_local *local = hw_to_local(hw);
735
736 rcu_read_lock();
737 __iterate_stations(local, iterator, data);
738 rcu_read_unlock();
739}
740EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
741
ad7e718c
JB		 742struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
743{
744 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
745
746 if (!ieee80211_sdata_running(sdata) ||
747 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
748 return NULL;
749 return &sdata->vif;
750}
751EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
752
dc5a1ad7
EG		 753struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
754{
755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
756
757 if (!ieee80211_sdata_running(sdata) ||
758 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
759 return NULL;
760
761 return &sdata->wdev;
762}
763EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
764
42935eca
LR		 765/*
766 * Nothing should have been stuffed into the workqueue during
4afaff17
EG		 767 * the suspend->resume cycle. Since we can't check each caller
768 * of this function if we are already quiescing / suspended,
769 * check here and don't WARN since this can actually happen when
770 * the rx path (for example) is racing against __ieee80211_suspend
771 * and suspending / quiescing was set after the rx path checked
772 * them.
42935eca
LR		 773 */
774static bool ieee80211_can_queue_work(struct ieee80211_local *local)
775{
4afaff17
EG		 776 if (local->quiescing || (local->suspended && !local->resuming)) {
777 pr_warn("queueing ieee80211 work while going to suspend\n");
ceb99fe0 778 return false;
4afaff17 779 }
42935eca
LR		 780
781 return true;
782}
783
784void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
785{
786 struct ieee80211_local *local = hw_to_local(hw);
787
788 if (!ieee80211_can_queue_work(local))
789 return;
790
791 queue_work(local->workqueue, work);
792}
793EXPORT_SYMBOL(ieee80211_queue_work);
794
795void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
796 struct delayed_work *dwork,
797 unsigned long delay)
798{
799 struct ieee80211_local *local = hw_to_local(hw);
800
801 if (!ieee80211_can_queue_work(local))
802 return;
803
804 queue_delayed_work(local->workqueue, dwork, delay);
805}
806EXPORT_SYMBOL(ieee80211_queue_delayed_work);
807
35d865af 808u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 809 struct ieee802_11_elems *elems,
810 u64 filter, u32 crc)
811{
812 size_t left = len;
35d865af 813 const u8 *pos = start;
dd76986b 814 bool calc_crc = filter != 0;
fcff4f10 815 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 816 const u8 *ie;
dd76986b 817
fcff4f10 818 bitmap_zero(seen_elems, 256);
dd76986b
JB		 819 memset(elems, 0, sizeof(*elems));
820 elems->ie_start = start;
821 elems->total_len = len;
822
823 while (left >= 2) {
824 u8 id, elen;
fcff4f10 825 bool elem_parse_failed;
dd76986b
JB		 826
827 id = *pos++;
828 elen = *pos++;
829 left -= 2;
830
fcff4f10
PS		 831 if (elen > left) {
832 elems->parse_error = true;
dd76986b 833 break;
fcff4f10
PS		 834 }
835
9690fb16
JB		 836 switch (id) {
837 case WLAN_EID_SSID:
838 case WLAN_EID_SUPP_RATES:
839 case WLAN_EID_FH_PARAMS:
840 case WLAN_EID_DS_PARAMS:
841 case WLAN_EID_CF_PARAMS:
842 case WLAN_EID_TIM:
843 case WLAN_EID_IBSS_PARAMS:
844 case WLAN_EID_CHALLENGE:
845 case WLAN_EID_RSN:
846 case WLAN_EID_ERP_INFO:
847 case WLAN_EID_EXT_SUPP_RATES:
848 case WLAN_EID_HT_CAPABILITY:
849 case WLAN_EID_HT_OPERATION:
850 case WLAN_EID_VHT_CAPABILITY:
851 case WLAN_EID_VHT_OPERATION:
852 case WLAN_EID_MESH_ID:
853 case WLAN_EID_MESH_CONFIG:
854 case WLAN_EID_PEER_MGMT:
855 case WLAN_EID_PREQ:
856 case WLAN_EID_PREP:
857 case WLAN_EID_PERR:
858 case WLAN_EID_RANN:
859 case WLAN_EID_CHANNEL_SWITCH:
860 case WLAN_EID_EXT_CHANSWITCH_ANN:
861 case WLAN_EID_COUNTRY:
862 case WLAN_EID_PWR_CONSTRAINT:
863 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 864 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 865 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 866 case WLAN_EID_CHAN_SWITCH_PARAM:
9041c1fa 867 case WLAN_EID_EXT_CAPABILITY:
53837584
AN		 868 case WLAN_EID_CHAN_SWITCH_TIMING:
869 case WLAN_EID_LINK_ID:
b2e506bf
JB		 870 /*
871 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
872 * that if the content gets bigger it might be needed more than once
873 */
9690fb16
JB		 874 if (test_bit(id, seen_elems)) {
875 elems->parse_error = true;
876 left -= elen;
877 pos += elen;
878 continue;
879 }
880 break;
fcff4f10 881 }
dd76986b
JB		 882
883 if (calc_crc && id < 64 && (filter & (1ULL << id)))
884 crc = crc32_be(crc, pos - 2, elen + 2);
885
fcff4f10
PS		 886 elem_parse_failed = false;
887
dd76986b 888 switch (id) {
53837584
AN		 889 case WLAN_EID_LINK_ID:
890 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
891 elem_parse_failed = true;
892 break;
893 }
894 elems->lnk_id = (void *)(pos - 2);
895 break;
896 case WLAN_EID_CHAN_SWITCH_TIMING:
897 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
898 elem_parse_failed = true;
899 break;
900 }
901 elems->ch_sw_timing = (void *)pos;
902 break;
9041c1fa
AN		 903 case WLAN_EID_EXT_CAPABILITY:
904 elems->ext_capab = pos;
905 elems->ext_capab_len = elen;
906 break;
dd76986b
JB		 907 case WLAN_EID_SSID:
908 elems->ssid = pos;
909 elems->ssid_len = elen;
910 break;
911 case WLAN_EID_SUPP_RATES:
912 elems->supp_rates = pos;
913 elems->supp_rates_len = elen;
914 break;
dd76986b 915 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 916 if (elen >= 1)
917 elems->ds_params = pos;
918 else
919 elem_parse_failed = true;
dd76986b 920 break;
dd76986b
JB		 921 case WLAN_EID_TIM:
922 if (elen >= sizeof(struct ieee80211_tim_ie)) {
923 elems->tim = (void *)pos;
924 elems->tim_len = elen;
fcff4f10
PS		 925 } else
926 elem_parse_failed = true;
dd76986b 927 break;
dd76986b
JB		 928 case WLAN_EID_CHALLENGE:
929 elems->challenge = pos;
930 elems->challenge_len = elen;
931 break;
932 case WLAN_EID_VENDOR_SPECIFIC:
933 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
934 pos[2] == 0xf2) {
935 /* Microsoft OUI (00:50:F2) */
936
937 if (calc_crc)
938 crc = crc32_be(crc, pos - 2, elen + 2);
939
441a33ba 940 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 941 /* OUI Type 2 - WMM IE */
942 if (pos[4] == 0) {
943 elems->wmm_info = pos;
944 elems->wmm_info_len = elen;
945 } else if (pos[4] == 1) {
946 elems->wmm_param = pos;
947 elems->wmm_param_len = elen;
948 }
949 }
950 }
951 break;
952 case WLAN_EID_RSN:
953 elems->rsn = pos;
954 elems->rsn_len = elen;
955 break;
956 case WLAN_EID_ERP_INFO:
1946bed9
JB		 957 if (elen >= 1)
958 elems->erp_info = pos;
959 else
960 elem_parse_failed = true;
dd76986b
JB		 961 break;
962 case WLAN_EID_EXT_SUPP_RATES:
963 elems->ext_supp_rates = pos;
964 elems->ext_supp_rates_len = elen;
965 break;
966 case WLAN_EID_HT_CAPABILITY:
967 if (elen >= sizeof(struct ieee80211_ht_cap))
968 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 969 else
970 elem_parse_failed = true;
dd76986b 971 break;
074d46d1
JB		 972 case WLAN_EID_HT_OPERATION:
973 if (elen >= sizeof(struct ieee80211_ht_operation))
974 elems->ht_operation = (void *)pos;
fcff4f10
PS		 975 else
976 elem_parse_failed = true;
dd76986b 977 break;
818255ea
MP		 978 case WLAN_EID_VHT_CAPABILITY:
979 if (elen >= sizeof(struct ieee80211_vht_cap))
980 elems->vht_cap_elem = (void *)pos;
981 else
982 elem_parse_failed = true;
983 break;
984 case WLAN_EID_VHT_OPERATION:
985 if (elen >= sizeof(struct ieee80211_vht_operation))
986 elems->vht_operation = (void *)pos;
987 else
988 elem_parse_failed = true;
989 break;
bee7f586
JB		 990 case WLAN_EID_OPMODE_NOTIF:
991 if (elen > 0)
992 elems->opmode_notif = pos;
993 else
994 elem_parse_failed = true;
995 break;
dd76986b
JB		 996 case WLAN_EID_MESH_ID:
997 elems->mesh_id = pos;
998 elems->mesh_id_len = elen;
999 break;
1000 case WLAN_EID_MESH_CONFIG:
1001 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1002 elems->mesh_config = (void *)pos;
fcff4f10
PS		 1003 else
1004 elem_parse_failed = true;
dd76986b
JB		 1005 break;
1006 case WLAN_EID_PEER_MGMT:
1007 elems->peering = pos;
1008 elems->peering_len = elen;
1009 break;
3f52b7e3
MP		 1010 case WLAN_EID_MESH_AWAKE_WINDOW:
1011 if (elen >= 2)
1012 elems->awake_window = (void *)pos;
1013 break;
dd76986b
JB		 1014 case WLAN_EID_PREQ:
1015 elems->preq = pos;
1016 elems->preq_len = elen;
1017 break;
1018 case WLAN_EID_PREP:
1019 elems->prep = pos;
1020 elems->prep_len = elen;
1021 break;
1022 case WLAN_EID_PERR:
1023 elems->perr = pos;
1024 elems->perr_len = elen;
1025 break;
1026 case WLAN_EID_RANN:
1027 if (elen >= sizeof(struct ieee80211_rann_ie))
1028 elems->rann = (void *)pos;
fcff4f10
PS		 1029 else
1030 elem_parse_failed = true;
dd76986b
JB		 1031 break;
1032 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 1033 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1034 elem_parse_failed = true;
1035 break;
1036 }
1037 elems->ch_switch_ie = (void *)pos;
dd76986b 1038 break;
b4f286a1
JB		 1039 case WLAN_EID_EXT_CHANSWITCH_ANN:
1040 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1041 elem_parse_failed = true;
1042 break;
1043 }
1044 elems->ext_chansw_ie = (void *)pos;
1045 break;
85220d71
JB		 1046 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1048 elem_parse_failed = true;
1049 break;
1050 }
1051 elems->sec_chan_offs = (void *)pos;
1052 break;
8f2535b9
CYY		 1053 case WLAN_EID_CHAN_SWITCH_PARAM:
1054 if (elen !=
1055 sizeof(*elems->mesh_chansw_params_ie)) {
1056 elem_parse_failed = true;
1057 break;
1058 }
1059 elems->mesh_chansw_params_ie = (void *)pos;
1060 break;
b2e506bf
JB		 1061 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1062 if (!action ||
1063 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1064 elem_parse_failed = true;
1065 break;
1066 }
1067 elems->wide_bw_chansw_ie = (void *)pos;
1068 break;
1069 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1070 if (action) {
1071 elem_parse_failed = true;
1072 break;
1073 }
1074 /*
1075 * This is a bit tricky, but as we only care about
1076 * the wide bandwidth channel switch element, so
1077 * just parse it out manually.
1078 */
1079 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1080 pos, elen);
1081 if (ie) {
1082 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1083 elems->wide_bw_chansw_ie =
1084 (void *)(ie + 2);
1085 else
1086 elem_parse_failed = true;
1087 }
1088 break;
dd76986b
JB		 1089 case WLAN_EID_COUNTRY:
1090 elems->country_elem = pos;
1091 elems->country_elem_len = elen;
1092 break;
1093 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1094 if (elen != 1) {
1095 elem_parse_failed = true;
1096 break;
1097 }
dd76986b 1098 elems->pwr_constr_elem = pos;
dd76986b 1099 break;
c8d65917
SG		 1100 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1101 /* Lots of different options exist, but we only care
1102 * about the Dynamic Transmit Power Control element.
1103 * First check for the Cisco OUI, then for the DTPC
1104 * tag (0x00).
1105 */
1106 if (elen < 4) {
1107 elem_parse_failed = true;
1108 break;
1109 }
1110
1111 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1112 pos[2] != 0x96 || pos[3] != 0x00)
1113 break;
1114
1115 if (elen != 6) {
1116 elem_parse_failed = true;
1117 break;
1118 }
1119
1120 if (calc_crc)
1121 crc = crc32_be(crc, pos - 2, elen + 2);
1122
1123 elems->cisco_dtpc_elem = pos;
1124 break;
dd76986b 1125 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1126 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1127 elems->timeout_int = (void *)pos;
1128 else
1129 elem_parse_failed = true;
dd76986b
JB		 1130 break;
1131 default:
1132 break;
1133 }
1134
fcff4f10
PS		 1135 if (elem_parse_failed)
1136 elems->parse_error = true;
1137 else
5df45690 1138 __set_bit(id, seen_elems);
fcff4f10 1139
dd76986b
JB		 1140 left -= elen;
1141 pos += elen;
1142 }
1143
fcff4f10
PS		 1144 if (left != 0)
1145 elems->parse_error = true;
1146
dd76986b
JB		 1147 return crc;
1148}
1149
3abead59
JB		 1150void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1151 bool bss_notify)
5825fe10
JB		 1152{
1153 struct ieee80211_local *local = sdata->local;
1154 struct ieee80211_tx_queue_params qparam;
55de908a 1155 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1156 int ac;
a8ce8544 1157 bool use_11b, enable_qos;
239281f8 1158 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
aa837e1d 1159 int aCWmin, aCWmax;
5825fe10
JB		 1160
1161 if (!local->ops->conf_tx)
1162 return;
1163
54bcbc69
JB		 1164 if (local->hw.queues < IEEE80211_NUM_ACS)
1165 return;
1166
5825fe10
JB		 1167 memset(&qparam, 0, sizeof(qparam));
1168
55de908a
JB		 1169 rcu_read_lock();
1170 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1171 use_11b = (chanctx_conf &&
4bf88530 1172 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1173 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1174 rcu_read_unlock();
5825fe10 1175
a8ce8544
SG		 1176 /*
1177 * By default disable QoS in STA mode for old access points, which do
1178 * not support 802.11e. New APs will provide proper queue parameters,
1179 * that we will configure later.
1180 */
1181 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1182
239281f8
RL		 1183 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1184
1f4ffde8
FZ		 1185 /* Set defaults according to 802.11-2007 Table 7-37 */
1186 aCWmax = 1023;
1187 if (use_11b)
1188 aCWmin = 31;
1189 else
1190 aCWmin = 15;
1191
1192 /* Confiure old 802.11b/g medium access rules. */
1193 qparam.cw_max = aCWmax;
1194 qparam.cw_min = aCWmin;
1195 qparam.txop = 0;
1196 qparam.aifs = 2;
aa837e1d 1197
1f4ffde8
FZ		 1198 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1199 /* Update if QoS is enabled. */
a8ce8544
SG		 1200 if (enable_qos) {
1201 switch (ac) {
1202 case IEEE80211_AC_BK:
1203 qparam.cw_max = aCWmax;
1204 qparam.cw_min = aCWmin;
1205 qparam.txop = 0;
239281f8
RL		 1206 if (is_ocb)
1207 qparam.aifs = 9;
1208 else
1209 qparam.aifs = 7;
a8ce8544
SG		 1210 break;
1211 /* never happens but let's not leave undefined */
1212 default:
1213 case IEEE80211_AC_BE:
1214 qparam.cw_max = aCWmax;
1215 qparam.cw_min = aCWmin;
1216 qparam.txop = 0;
239281f8
RL		 1217 if (is_ocb)
1218 qparam.aifs = 6;
1219 else
1220 qparam.aifs = 3;
a8ce8544
SG		 1221 break;
1222 case IEEE80211_AC_VI:
1223 qparam.cw_max = aCWmin;
1224 qparam.cw_min = (aCWmin + 1) / 2 - 1;
239281f8
RL		 1225 if (is_ocb)
1226 qparam.txop = 0;
1227 else if (use_11b)
a8ce8544
SG		 1228 qparam.txop = 6016/32;
1229 else
1230 qparam.txop = 3008/32;
239281f8
RL		 1231
1232 if (is_ocb)
1233 qparam.aifs = 3;
1234 else
1235 qparam.aifs = 2;
a8ce8544
SG		 1236 break;
1237 case IEEE80211_AC_VO:
1238 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1239 qparam.cw_min = (aCWmin + 1) / 4 - 1;
239281f8
RL		 1240 if (is_ocb)
1241 qparam.txop = 0;
1242 else if (use_11b)
a8ce8544
SG		 1243 qparam.txop = 3264/32;
1244 else
1245 qparam.txop = 1504/32;
1246 qparam.aifs = 2;
1247 break;
1248 }
aa837e1d 1249 }
5825fe10 1250
ab13315a
KV		 1251 qparam.uapsd = false;
1252
54bcbc69
JB		 1253 sdata->tx_conf[ac] = qparam;
1254 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1255 }
e1b3ec1a 1256
f142c6b9
JB		 1257 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1258 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1259 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1260 if (bss_notify)
1261 ieee80211_bss_info_change_notify(sdata,
1262 BSS_CHANGED_QOS);
d9734979 1263 }
5825fe10 1264}
e50db65c 1265
46900298 1266void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1267 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1268 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1269 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1270 u32 tx_flags)
46900298
JB		 1271{
1272 struct ieee80211_local *local = sdata->local;
1273 struct sk_buff *skb;
1274 struct ieee80211_mgmt *mgmt;
fffd0934 1275 int err;
46900298 1276
15e230ab 1277 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1278 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1279 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1280 if (!skb)
46900298 1281 return;
d15b8459 1282
744462a9 1283 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1284
1285 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1286 memset(mgmt, 0, 24 + 6);
1287 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1288 IEEE80211_STYPE_AUTH);
efa6a09d 1289 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1290 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1291 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1292 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1293 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1294 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1295 if (extra)
1296 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1297
fffd0934
JB		 1298 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1299 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1300 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1301 WARN_ON(err);
1302 }
1303
1672c0e3
JB		 1304 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1305 tx_flags;
62ae67be 1306 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1307}
1308
6ae16775
AQ		 1309void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1310 const u8 *bssid, u16 stype, u16 reason,
1311 bool send_frame, u8 *frame_buf)
1312{
1313 struct ieee80211_local *local = sdata->local;
1314 struct sk_buff *skb;
1315 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1316
1317 /* build frame */
1318 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1319 mgmt->duration = 0; /* initialize only */
1320 mgmt->seq_ctrl = 0; /* initialize only */
1321 memcpy(mgmt->da, bssid, ETH_ALEN);
1322 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1323 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1324 /* u.deauth.reason_code == u.disassoc.reason_code */
1325 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1326
1327 if (send_frame) {
1328 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1329 IEEE80211_DEAUTH_FRAME_LEN);
1330 if (!skb)
1331 return;
1332
1333 skb_reserve(skb, local->hw.extra_tx_headroom);
1334
1335 /* copy in frame */
1336 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1337 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1338
1339 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1340 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1341 IEEE80211_SKB_CB(skb)->flags |=
1342 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1343
1344 ieee80211_tx_skb(sdata, skb);
1345 }
1346}
1347
c56ef672
DS		 1348static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1349 u8 *buffer, size_t buffer_len,
1350 const u8 *ie, size_t ie_len,
1351 enum ieee80211_band band,
1352 u32 rate_mask,
1353 struct cfg80211_chan_def *chandef,
1354 size_t *offset)
de95a54b
JB		 1355{
1356 struct ieee80211_supported_band *sband;
c604b9f2 1357 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1358 size_t noffset;
8e664fb3 1359 int supp_rates_len, i;
8dcb2003
JM		 1360 u8 rates[32];
1361 int num_rates;
1362 int ext_rates_len;
2103dec1
SW		 1363 int shift;
1364 u32 rate_flags;
40a11ca8 1365 bool have_80mhz = false;
de95a54b 1366
c56ef672
DS		 1367 *offset = 0;
1368
4d36ec58 1369 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1370 if (WARN_ON_ONCE(!sband))
1371 return 0;
de95a54b 1372
2103dec1
SW		 1373 rate_flags = ieee80211_chandef_rate_flags(chandef);
1374 shift = ieee80211_chandef_get_shift(chandef);
1375
8dcb2003
JM		 1376 num_rates = 0;
1377 for (i = 0; i < sband->n_bitrates; i++) {
1378 if ((BIT(i) & rate_mask) == 0)
1379 continue; /* skip rate */
2103dec1
SW		 1380 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1381 continue;
1382
1383 rates[num_rates++] =
1384 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1385 (1 << shift) * 5);
8dcb2003
JM		 1386 }
1387
1388 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1389
c604b9f2
JB		 1390 if (end - pos < 2 + supp_rates_len)
1391 goto out_err;
de95a54b 1392 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1393 *pos++ = supp_rates_len;
8dcb2003
JM		 1394 memcpy(pos, rates, supp_rates_len);
1395 pos += supp_rates_len;
8e664fb3
JB		 1396
1397 /* insert "request information" if in custom IEs */
1398 if (ie && ie_len) {
1399 static const u8 before_extrates[] = {
1400 WLAN_EID_SSID,
1401 WLAN_EID_SUPP_RATES,
1402 WLAN_EID_REQUEST,
1403 };
1404 noffset = ieee80211_ie_split(ie, ie_len,
1405 before_extrates,
1406 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1407 *offset);
1408 if (end - pos < noffset - *offset)
c604b9f2 1409 goto out_err;
c56ef672
DS		 1410 memcpy(pos, ie + *offset, noffset - *offset);
1411 pos += noffset - *offset;
1412 *offset = noffset;
8e664fb3
JB		 1413 }
1414
8dcb2003
JM		 1415 ext_rates_len = num_rates - supp_rates_len;
1416 if (ext_rates_len > 0) {
c604b9f2
JB		 1417 if (end - pos < 2 + ext_rates_len)
1418 goto out_err;
8e664fb3 1419 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1420 *pos++ = ext_rates_len;
1421 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1422 pos += ext_rates_len;
8e664fb3
JB		 1423 }
1424
2103dec1 1425 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1426 if (end - pos < 3)
1427 goto out_err;
651b5225
JM		 1428 *pos++ = WLAN_EID_DS_PARAMS;
1429 *pos++ = 1;
2103dec1
SW		 1430 *pos++ = ieee80211_frequency_to_channel(
1431 chandef->chan->center_freq);
651b5225
JM		 1432 }
1433
8e664fb3
JB		 1434 /* insert custom IEs that go before HT */
1435 if (ie && ie_len) {
1436 static const u8 before_ht[] = {
1437 WLAN_EID_SSID,
1438 WLAN_EID_SUPP_RATES,
1439 WLAN_EID_REQUEST,
1440 WLAN_EID_EXT_SUPP_RATES,
1441 WLAN_EID_DS_PARAMS,
1442 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1443 };
1444 noffset = ieee80211_ie_split(ie, ie_len,
1445 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1446 *offset);
1447 if (end - pos < noffset - *offset)
c604b9f2 1448 goto out_err;
c56ef672
DS		 1449 memcpy(pos, ie + *offset, noffset - *offset);
1450 pos += noffset - *offset;
1451 *offset = noffset;
de95a54b
JB		 1452 }
1453
c604b9f2
JB		 1454 if (sband->ht_cap.ht_supported) {
1455 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1456 goto out_err;
ef96a842
BG		 1457 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1458 sband->ht_cap.cap);
c604b9f2 1459 }
5ef2d41a 1460
de95a54b
JB		 1461 /*
1462 * If adding more here, adjust code in main.c
1463 * that calculates local->scan_ies_len.
1464 */
1465
4d952300 1466 /* insert custom IEs that go before VHT */
8e664fb3 1467 if (ie && ie_len) {
4d952300
JB		 1468 static const u8 before_vht[] = {
1469 WLAN_EID_SSID,
1470 WLAN_EID_SUPP_RATES,
1471 WLAN_EID_REQUEST,
1472 WLAN_EID_EXT_SUPP_RATES,
1473 WLAN_EID_DS_PARAMS,
1474 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1475 WLAN_EID_HT_CAPABILITY,
1476 WLAN_EID_BSS_COEX_2040,
1477 WLAN_EID_EXT_CAPABILITY,
1478 WLAN_EID_SSID_LIST,
1479 WLAN_EID_CHANNEL_USAGE,
1480 WLAN_EID_INTERWORKING,
1481 /* mesh ID can't happen here */
1482 /* 60 GHz can't happen here right now */
1483 };
1484 noffset = ieee80211_ie_split(ie, ie_len,
1485 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1486 *offset);
1487 if (end - pos < noffset - *offset)
c604b9f2 1488 goto out_err;
c56ef672
DS		 1489 memcpy(pos, ie + *offset, noffset - *offset);
1490 pos += noffset - *offset;
1491 *offset = noffset;
de95a54b
JB		 1492 }
1493
40a11ca8
JB		 1494 /* Check if any channel in this sband supports at least 80 MHz */
1495 for (i = 0; i < sband->n_channels; i++) {
fa44b988
AN		 1496 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1497 IEEE80211_CHAN_NO_80MHZ))
1498 continue;
1499
1500 have_80mhz = true;
1501 break;
40a11ca8
JB		 1502 }
1503
1504 if (sband->vht_cap.vht_supported && have_80mhz) {
c604b9f2
JB		 1505 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1506 goto out_err;
ba0afa2f
MP		 1507 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1508 sband->vht_cap.cap);
c604b9f2 1509 }
ba0afa2f 1510
c604b9f2
JB		 1511 return pos - buffer;
1512 out_err:
1513 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1514 return pos - buffer;
1515}
1516
c56ef672
DS		 1517int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1518 size_t buffer_len,
1519 struct ieee80211_scan_ies *ie_desc,
1520 const u8 *ie, size_t ie_len,
1521 u8 bands_used, u32 *rate_masks,
1522 struct cfg80211_chan_def *chandef)
1523{
1524 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1525 int i;
1526
1527 memset(ie_desc, 0, sizeof(*ie_desc));
1528
1529 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1530 if (bands_used & BIT(i)) {
1531 pos += ieee80211_build_preq_ies_band(local,
1532 buffer + pos,
1533 buffer_len - pos,
1534 ie, ie_len, i,
1535 rate_masks[i],
1536 chandef,
1537 &custom_ie_offset);
1538 ie_desc->ies[i] = buffer + old_pos;
1539 ie_desc->len[i] = pos - old_pos;
1540 old_pos = pos;
1541 }
1542 }
1543
1544 /* add any remaining custom IEs */
1545 if (ie && ie_len) {
1546 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1547 "not enough space for preq custom IEs\n"))
1548 return pos;
1549 memcpy(buffer + pos, ie + custom_ie_offset,
1550 ie_len - custom_ie_offset);
1551 ie_desc->common_ies = buffer + pos;
1552 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1553 pos += ie_len - custom_ie_offset;
1554 }
1555
1556 return pos;
1557};
1558
a619a4c0 1559struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
a344d677
JB		 1560 const u8 *src, const u8 *dst,
1561 u32 ratemask,
6b77863b 1562 struct ieee80211_channel *chan,
a619a4c0 1563 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1564 const u8 *ie, size_t ie_len,
1565 bool directed)
46900298
JB		 1566{
1567 struct ieee80211_local *local = sdata->local;
2103dec1 1568 struct cfg80211_chan_def chandef;
46900298
JB		 1569 struct sk_buff *skb;
1570 struct ieee80211_mgmt *mgmt;
b9a9ada1 1571 int ies_len;
c56ef672
DS		 1572 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1573 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1574
a806c558
PS		 1575 /*
1576 * Do not send DS Channel parameter for directed probe requests
1577 * in order to maximize the chance that we get a response. Some
1578 * badly-behaved APs don't respond when this parameter is included.
1579 */
2103dec1 1580 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1581 if (directed)
2103dec1 1582 chandef.chan = NULL;
a806c558 1583 else
2103dec1 1584 chandef.chan = chan;
651b5225 1585
a344d677
JB		 1586 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1587 100 + ie_len);
5b2bbf75 1588 if (!skb)
b9a9ada1
JB		 1589 return NULL;
1590
c56ef672 1591 rate_masks[chan->band] = ratemask;
b9a9ada1 1592 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1593 skb_tailroom(skb), &dummy_ie_desc,
1594 ie, ie_len, BIT(chan->band),
1595 rate_masks, &chandef);
b9a9ada1 1596 skb_put(skb, ies_len);
7c12ce8b 1597
46900298 1598 if (dst) {
7c12ce8b 1599 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1600 memcpy(mgmt->da, dst, ETH_ALEN);
1601 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1602 }
46900298 1603
62ae67be 1604 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1605
a619a4c0
JO		 1606 return skb;
1607}
1608
a344d677
JB		 1609void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1610 const u8 *src, const u8 *dst,
a619a4c0 1611 const u8 *ssid, size_t ssid_len,
a806c558 1612 const u8 *ie, size_t ie_len,
1672c0e3 1613 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1614 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1615{
1616 struct sk_buff *skb;
1617
a344d677 1618 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
6b77863b 1619 ssid, ssid_len,
85a237fe 1620 ie, ie_len, directed);
aad14ceb 1621 if (skb) {
1672c0e3 1622 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1623 if (scan)
1624 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1625 else
1626 ieee80211_tx_skb(sdata, skb);
aad14ceb 1627 }
46900298
JB		 1628}
1629
2103dec1 1630u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1631 struct ieee802_11_elems *elems,
9ebb61a2 1632 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1633{
1634 struct ieee80211_supported_band *sband;
46900298 1635 size_t num_rates;
2103dec1
SW		 1636 u32 supp_rates, rate_flags;
1637 int i, j, shift;
1638 sband = sdata->local->hw.wiphy->bands[band];
1639
1640 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1641 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1642
4ee73f33
MK		 1643 if (WARN_ON(!sband))
1644 return 1;
46900298 1645
46900298
JB		 1646 num_rates = sband->n_bitrates;
1647 supp_rates = 0;
1648 for (i = 0; i < elems->supp_rates_len +
1649 elems->ext_supp_rates_len; i++) {
1650 u8 rate = 0;
1651 int own_rate;
9ebb61a2 1652 bool is_basic;
46900298
JB		 1653 if (i < elems->supp_rates_len)
1654 rate = elems->supp_rates[i];
1655 else if (elems->ext_supp_rates)
1656 rate = elems->ext_supp_rates
1657 [i - elems->supp_rates_len];
1658 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1659 is_basic = !!(rate & 0x80);
1660
1661 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1662 continue;
1663
1664 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1665 int brate;
1666 if ((rate_flags & sband->bitrates[j].flags)
1667 != rate_flags)
1668 continue;
1669
1670 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1671 1 << shift);
1672
1673 if (brate == own_rate) {
46900298 1674 supp_rates |= BIT(j);
9ebb61a2
AN		 1675 if (basic_rates && is_basic)
1676 *basic_rates |= BIT(j);
1677 }
1678 }
46900298
JB		 1679 }
1680 return supp_rates;
1681}
f2753ddb 1682
84f6a01c
JB		 1683void ieee80211_stop_device(struct ieee80211_local *local)
1684{
1685 ieee80211_led_radio(local, false);
67408c8c 1686 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1687
1688 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1689
1690 flush_workqueue(local->workqueue);
678f415f 1691 drv_stop(local);
84f6a01c
JB		 1692}
1693
f6837ba8
JB		 1694static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1695{
1696 struct ieee80211_sub_if_data *sdata;
1697 struct ieee80211_chanctx *ctx;
1698
1699 /*
1700 * We get here if during resume the device can't be restarted properly.
1701 * We might also get here if this happens during HW reset, which is a
1702 * slightly different situation and we need to drop all connections in
1703 * the latter case.
1704 *
1705 * Ask cfg80211 to turn off all interfaces, this will result in more
1706 * warnings but at least we'll then get into a clean stopped state.
1707 */
1708
1709 local->resuming = false;
1710 local->suspended = false;
1711 local->started = false;
1712
1713 /* scheduled scan clearly can't be running any more, but tell
1714 * cfg80211 and clear local state
1715 */
1716 ieee80211_sched_scan_end(local);
1717
1718 list_for_each_entry(sdata, &local->interfaces, list)
1719 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1720
1721 /* Mark channel contexts as not being in the driver any more to avoid
1722 * removing them from the driver during the shutdown process...
1723 */
1724 mutex_lock(&local->chanctx_mtx);
1725 list_for_each_entry(ctx, &local->chanctx_list, list)
1726 ctx->driver_present = false;
1727 mutex_unlock(&local->chanctx_mtx);
1728
1729 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1730}
1731
153a5fc4
SG		 1732static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1733 struct ieee80211_sub_if_data *sdata)
1734{
1735 struct ieee80211_chanctx_conf *conf;
1736 struct ieee80211_chanctx *ctx;
1737
1738 if (!local->use_chanctx)
1739 return;
1740
1741 mutex_lock(&local->chanctx_mtx);
1742 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1743 lockdep_is_held(&local->chanctx_mtx));
1744 if (conf) {
1745 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1746 drv_assign_vif_chanctx(local, sdata, ctx);
1747 }
1748 mutex_unlock(&local->chanctx_mtx);
1749}
1750
f2753ddb
JB		 1751int ieee80211_reconfig(struct ieee80211_local *local)
1752{
1753 struct ieee80211_hw *hw = &local->hw;
1754 struct ieee80211_sub_if_data *sdata;
55de908a 1755 struct ieee80211_chanctx *ctx;
f2753ddb 1756 struct sta_info *sta;
2683d65b 1757 int res, i;
d888130a 1758 bool reconfig_due_to_wowlan = false;
d43c6b6e 1759 struct ieee80211_sub_if_data *sched_scan_sdata;
6ea0a69c 1760 struct cfg80211_sched_scan_request *sched_scan_req;
d43c6b6e 1761 bool sched_scan_stopped = false;
d888130a 1762
0f8b8245
EP		 1763 /* nothing to do if HW shouldn't run */
1764 if (!local->open_count)
1765 goto wake_up;
1766
8f21b0ad 1767#ifdef CONFIG_PM
ceb99fe0
JB		 1768 if (local->suspended)
1769 local->resuming = true;
f2753ddb 1770
eecc4800 1771 if (local->wowlan) {
eecc4800 1772 res = drv_resume(local);
27b3eb9c 1773 local->wowlan = false;
eecc4800
JB		 1774 if (res < 0) {
1775 local->resuming = false;
1776 return res;
1777 }
1778 if (res == 0)
1779 goto wake_up;
1780 WARN_ON(res > 1);
1781 /*
1782 * res is 1, which means the driver requested
1783 * to go through a regular reset on wakeup.
1784 */
d888130a 1785 reconfig_due_to_wowlan = true;
eecc4800
JB		 1786 }
1787#endif
f2753ddb 1788
94f9b97b
JB		 1789 /*
1790 * Upon resume hardware can sometimes be goofy due to
1791 * various platform / driver / bus issues, so restarting
1792 * the device may at times not work immediately. Propagate
1793 * the error.
1794 */
1795 res = drv_start(local);
1796 if (res) {
f6837ba8
JB		 1797 if (local->suspended)
1798 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1799 else
1800 WARN(1, "Hardware became unavailable during restart.\n");
1801 ieee80211_handle_reconfig_failure(local);
94f9b97b 1802 return res;
f2753ddb
JB		 1803 }
1804
7f281975
YAP		 1805 /* setup fragmentation threshold */
1806 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1807
1808 /* setup RTS threshold */
1809 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1810
1811 /* reset coverage class */
1812 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1813
94f9b97b
JB		 1814 ieee80211_led_radio(local, true);
1815 ieee80211_mod_tpt_led_trig(local,
1816 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1817
f2753ddb 1818 /* add interfaces */
4b6f1dd6
JB		 1819 sdata = rtnl_dereference(local->monitor_sdata);
1820 if (sdata) {
3c3e21e7
JB		 1821 /* in HW restart it exists already */
1822 WARN_ON(local->resuming);
4b6f1dd6
JB		 1823 res = drv_add_interface(local, sdata);
1824 if (WARN_ON(res)) {
0c2bef46 1825 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1826 synchronize_net();
1827 kfree(sdata);
1828 }
1829 }
1830
f2753ddb
JB		 1831 list_for_each_entry(sdata, &local->interfaces, list) {
1832 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1833 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
c8fff3dc 1834 ieee80211_sdata_running(sdata)) {
7b7eab6f 1835 res = drv_add_interface(local, sdata);
c8fff3dc
LC		 1836 if (WARN_ON(res))
1837 break;
1838 }
1839 }
1840
1841 /* If adding any of the interfaces failed above, roll back and
1842 * report failure.
1843 */
1844 if (res) {
1845 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1846 list)
1847 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1848 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1849 ieee80211_sdata_running(sdata))
1850 drv_remove_interface(local, sdata);
1851 ieee80211_handle_reconfig_failure(local);
1852 return res;
f2753ddb
JB		 1853 }
1854
55de908a 1855 /* add channel contexts */
f0dea9c7
AS		 1856 if (local->use_chanctx) {
1857 mutex_lock(&local->chanctx_mtx);
1858 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1859 if (ctx->replace_state !=
1860 IEEE80211_CHANCTX_REPLACES_OTHER)
1861 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1862 mutex_unlock(&local->chanctx_mtx);
55de908a 1863
7df180f7
ZG		 1864 list_for_each_entry(sdata, &local->interfaces, list) {
1865 if (!ieee80211_sdata_running(sdata))
1866 continue;
1867 ieee80211_assign_chanctx(local, sdata);
1868 }
6352c87f 1869
7df180f7
ZG		 1870 sdata = rtnl_dereference(local->monitor_sdata);
1871 if (sdata && ieee80211_sdata_running(sdata))
1872 ieee80211_assign_chanctx(local, sdata);
1873 }
fe5f2559 1874
f2753ddb 1875 /* add STAs back */
34e89507
JB		 1876 mutex_lock(&local->sta_mtx);
1877 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1878 enum ieee80211_sta_state state;
f09603a2 1879
2e8d397e
AN		 1880 if (!sta->uploaded)
1881 continue;
1882
1883 /* AP-mode stations will be added later */
1884 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1885 continue;
1886
1887 for (state = IEEE80211_STA_NOTEXIST;
1888 state < sta->sta_state; state++)
1889 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1890 state + 1));
f2753ddb 1891 }
34e89507 1892 mutex_unlock(&local->sta_mtx);
f2753ddb 1893
2683d65b 1894 /* reconfigure tx conf */
54bcbc69
JB		 1895 if (hw->queues >= IEEE80211_NUM_ACS) {
1896 list_for_each_entry(sdata, &local->interfaces, list) {
1897 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1898 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1899 !ieee80211_sdata_running(sdata))
1900 continue;
f6f3def3 1901
54bcbc69
JB		 1902 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1903 drv_conf_tx(local, sdata, i,
1904 &sdata->tx_conf[i]);
1905 }
f6f3def3 1906 }
2683d65b 1907
f2753ddb
JB		 1908 /* reconfigure hardware */
1909 ieee80211_hw_config(local, ~0);
1910
f2753ddb 1911 ieee80211_configure_filter(local);
f2753ddb
JB		 1912
1913 /* Finally also reconfigure all the BSS information */
1914 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1915 u32 changed;
1916
9607e6b6 1917 if (!ieee80211_sdata_running(sdata))
f2753ddb 1918 continue;
ac8dd506
JB		 1919
1920 /* common change flags for all interface types */
1921 changed = BSS_CHANGED_ERP_CTS_PROT |
1922 BSS_CHANGED_ERP_PREAMBLE |
1923 BSS_CHANGED_ERP_SLOT |
1924 BSS_CHANGED_HT |
1925 BSS_CHANGED_BASIC_RATES |
1926 BSS_CHANGED_BEACON_INT |
1927 BSS_CHANGED_BSSID |
4ced3f74 1928 BSS_CHANGED_CQM |
55de47f6 1929 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1930 BSS_CHANGED_IDLE |
1931 BSS_CHANGED_TXPOWER;
ac8dd506 1932
f2753ddb
JB		 1933 switch (sdata->vif.type) {
1934 case NL80211_IFTYPE_STATION:
0d392e93 1935 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1936 BSS_CHANGED_ARP_FILTER |
1937 BSS_CHANGED_PS;
c65dd147 1938
989c6505
AB		 1939 /* Re-send beacon info report to the driver */
1940 if (sdata->u.mgd.have_beacon)
1941 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1942
8d61ffa5 1943 sdata_lock(sdata);
ac8dd506 1944 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1945 sdata_unlock(sdata);
ac8dd506 1946 break;
6e0bd6c3 1947 case NL80211_IFTYPE_OCB:
239281f8
RL		 1948 changed |= BSS_CHANGED_OCB;
1949 ieee80211_bss_info_change_notify(sdata, changed);
6e0bd6c3 1950 break;
f2753ddb 1951 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1952 changed |= BSS_CHANGED_IBSS;
1953 /* fall through */
f2753ddb 1954 case NL80211_IFTYPE_AP:
339afbf4 1955 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1956
1041638f 1957 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1958 changed |= BSS_CHANGED_AP_PROBE_RESP;
1959
1041638f
JB		 1960 if (rcu_access_pointer(sdata->u.ap.beacon))
1961 drv_start_ap(local, sdata);
1962 }
1963
7827493b 1964 /* fall through */
f2753ddb 1965 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1966 if (sdata->vif.bss_conf.enable_beacon) {
1967 changed |= BSS_CHANGED_BEACON |
1968 BSS_CHANGED_BEACON_ENABLED;
1969 ieee80211_bss_info_change_notify(sdata, changed);
1970 }
f2753ddb
JB		 1971 break;
1972 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1973 case NL80211_IFTYPE_AP_VLAN:
1974 case NL80211_IFTYPE_MONITOR:
98104fde 1975 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1976 /* nothing to do */
f142c6b9 1977 break;
f2753ddb 1978 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1979 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1980 case NL80211_IFTYPE_P2P_CLIENT:
1981 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1982 WARN_ON(1);
1983 break;
1984 }
1985 }
1986
8e1b23b9
ES		 1987 ieee80211_recalc_ps(local, -1);
1988
6e1b1b24
EP		 1989 /*
1990 * The sta might be in psm against the ap (e.g. because
1991 * this was the state before a hw restart), so we
1992 * explicitly send a null packet in order to make sure
1993 * it'll sync against the ap (and get out of psm).
1994 */
1995 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1996 list_for_each_entry(sdata, &local->interfaces, list) {
1997 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1998 continue;
20f544ee
JB		 1999 if (!sdata->u.mgd.associated)
2000 continue;
6e1b1b24
EP		 2001
2002 ieee80211_send_nullfunc(local, sdata, 0);
2003 }
2004 }
2005
2e8d397e
AN		 2006 /* APs are now beaconing, add back stations */
2007 mutex_lock(&local->sta_mtx);
2008 list_for_each_entry(sta, &local->sta_list, list) {
2009 enum ieee80211_sta_state state;
2010
2011 if (!sta->uploaded)
2012 continue;
2013
2014 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2015 continue;
2016
2017 for (state = IEEE80211_STA_NOTEXIST;
2018 state < sta->sta_state; state++)
2019 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2020 state + 1));
2021 }
2022 mutex_unlock(&local->sta_mtx);
2023
7b21aea0 2024 /* add back keys */
f9dca80b
MK		 2025 list_for_each_entry(sdata, &local->interfaces, list)
2026 ieee80211_reset_crypto_tx_tailroom(sdata);
2027
7b21aea0
ES		 2028 list_for_each_entry(sdata, &local->interfaces, list)
2029 if (ieee80211_sdata_running(sdata))
2030 ieee80211_enable_keys(sdata);
2031
c6209488 2032 wake_up:
04800ada
AN		 2033 local->in_reconfig = false;
2034 barrier();
2035
3c3e21e7
JB		 2036 if (local->monitors == local->open_count && local->monitors > 0)
2037 ieee80211_add_virtual_monitor(local);
2038
2a419056
JB		 2039 /*
2040 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2041 * sessions can be established after a resume.
2042 *
2043 * Also tear down aggregation sessions since reconfiguring
2044 * them in a hardware restart scenario is not easily done
2045 * right now, and the hardware will have lost information
2046 * about the sessions, but we and the AP still think they
2047 * are active. This is really a workaround though.
2048 */
74e2bd1f 2049 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 2050 mutex_lock(&local->sta_mtx);
2051
2052 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 2053 ieee80211_sta_tear_down_BA_sessions(
2054 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 2055 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 2056 }
2a419056
JB		 2057
2058 mutex_unlock(&local->sta_mtx);
74e2bd1f 2059 }
74e2bd1f 2060
445ea4e8 2061 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 2062 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2063 false);
f2753ddb 2064
32769814
AN		 2065 /*
2066 * Reconfigure sched scan if it was interrupted by FW restart or
2067 * suspend.
2068 */
2069 mutex_lock(&local->mtx);
2070 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2071 lockdep_is_held(&local->mtx));
6ea0a69c
JB		 2072 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2073 lockdep_is_held(&local->mtx));
2074 if (sched_scan_sdata && sched_scan_req)
32769814
AN		 2075 /*
2076 * Sched scan stopped, but we don't want to report it. Instead,
2077 * we're trying to reschedule.
2078 */
2079 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
6ea0a69c 2080 sched_scan_req))
32769814
AN		 2081 sched_scan_stopped = true;
2082 mutex_unlock(&local->mtx);
2083
2084 if (sched_scan_stopped)
e669ba2d 2085 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 2086
5bb644a0
JB		 2087 /*
2088 * If this is for hw restart things are still running.
2089 * We may want to change that later, however.
2090 */
0f8b8245 2091 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
cf2c92d8 2092 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
8f21b0ad
JB		 2093
2094 if (!local->suspended)
5bb644a0
JB		 2095 return 0;
2096
2097#ifdef CONFIG_PM
ceb99fe0 2098 /* first set suspended false, then resuming */
5bb644a0 2099 local->suspended = false;
ceb99fe0
JB		 2100 mb();
2101 local->resuming = false;
5bb644a0 2102
9120d94e
LC		 2103 /* It's possible that we don't handle the scan completion in
2104 * time during suspend, so if it's still marked as completed
2105 * here, queue the work and flush it to clean things up.
2106 * Instead of calling the worker function directly here, we
2107 * really queue it to avoid potential races with other flows
2108 * scheduling the same work.
2109 */
2110 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2111 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2112 flush_delayed_work(&local->scan_work);
2113 }
2114
0f8b8245 2115 if (local->open_count && !reconfig_due_to_wowlan)
cf2c92d8
EP		 2116 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2117
b8360ab8
JB		 2118 list_for_each_entry(sdata, &local->interfaces, list) {
2119 if (!ieee80211_sdata_running(sdata))
2120 continue;
2121 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2122 ieee80211_sta_restart(sdata);
2123 }
2124
26d59535 2125 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 2126#else
2127 WARN_ON(1);
2128#endif
d43c6b6e 2129
f2753ddb
JB		 2130 return 0;
2131}
42935eca 2132
95acac61
JB		 2133void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2134{
2135 struct ieee80211_sub_if_data *sdata;
2136 struct ieee80211_local *local;
2137 struct ieee80211_key *key;
2138
2139 if (WARN_ON(!vif))
2140 return;
2141
2142 sdata = vif_to_sdata(vif);
2143 local = sdata->local;
2144
2145 if (WARN_ON(!local->resuming))
2146 return;
2147
2148 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2149 return;
2150
2151 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2152
2153 mutex_lock(&local->key_mtx);
2154 list_for_each_entry(key, &sdata->key_list, list)
2155 key->flags |= KEY_FLAG_TAINTED;
2156 mutex_unlock(&local->key_mtx);
2157}
2158EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2159
04ecd257 2160void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2161{
04ecd257
JB		 2162 struct ieee80211_local *local = sdata->local;
2163 struct ieee80211_chanctx_conf *chanctx_conf;
2164 struct ieee80211_chanctx *chanctx;
025e6be2 2165
04ecd257 2166 mutex_lock(&local->chanctx_mtx);
0f78231b 2167
04ecd257
JB		 2168 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2169 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2170
04ecd257 2171 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2172 goto unlock;
0f78231b 2173
04ecd257
JB		 2174 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2175 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2176 unlock:
04ecd257 2177 mutex_unlock(&local->chanctx_mtx);
0f78231b 2178}
8e664fb3 2179
21f659bf
EP		 2180void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2181{
2182 struct ieee80211_local *local = sdata->local;
2183 struct ieee80211_chanctx_conf *chanctx_conf;
2184 struct ieee80211_chanctx *chanctx;
2185
2186 mutex_lock(&local->chanctx_mtx);
2187
2188 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2189 lockdep_is_held(&local->chanctx_mtx));
2190
2191 if (WARN_ON_ONCE(!chanctx_conf))
2192 goto unlock;
2193
2194 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2195 ieee80211_recalc_chanctx_min_def(local, chanctx);
2196 unlock:
2197 mutex_unlock(&local->chanctx_mtx);
2198}
2199
8e664fb3
JB		 2200size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2201{
2202 size_t pos = offset;
2203
2204 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2205 pos += 2 + ies[pos + 1];
2206
2207 return pos;
2208}
615f7b9b
MV		 2209
2210static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2211 int rssi_min_thold,
2212 int rssi_max_thold)
2213{
2214 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2215
2216 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2217 return;
2218
2219 /*
2220 * Scale up threshold values before storing it, as the RSSI averaging
2221 * algorithm uses a scaled up value as well. Change this scaling
2222 * factor if the RSSI averaging algorithm changes.
2223 */
2224 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2225 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2226}
2227
2228void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2229 int rssi_min_thold,
2230 int rssi_max_thold)
2231{
2232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2233
2234 WARN_ON(rssi_min_thold == rssi_max_thold ||
2235 rssi_min_thold > rssi_max_thold);
2236
2237 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2238 rssi_max_thold);
2239}
2240EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2241
2242void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2243{
2244 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2245
2246 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2247}
2248EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2249
ef96a842 2250u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2251 u16 cap)
2252{
2253 __le16 tmp;
2254
2255 *pos++ = WLAN_EID_HT_CAPABILITY;
2256 *pos++ = sizeof(struct ieee80211_ht_cap);
2257 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2258
2259 /* capability flags */
2260 tmp = cpu_to_le16(cap);
2261 memcpy(pos, &tmp, sizeof(u16));
2262 pos += sizeof(u16);
2263
2264 /* AMPDU parameters */
ef96a842
BG		 2265 *pos++ = ht_cap->ampdu_factor |
2266 (ht_cap->ampdu_density <<
42e7aa77
AS		 2267 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2268
2269 /* MCS set */
ef96a842
BG		 2270 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2271 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2272
2273 /* extended capabilities */
2274 pos += sizeof(__le16);
2275
2276 /* BF capabilities */
2277 pos += sizeof(__le32);
2278
2279 /* antenna selection */
2280 pos += sizeof(u8);
2281
2282 return pos;
2283}
2284
ba0afa2f 2285u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2286 u32 cap)
ba0afa2f
MP		 2287{
2288 __le32 tmp;
2289
2290 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2291 *pos++ = sizeof(struct ieee80211_vht_cap);
2292 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2293
2294 /* capability flags */
2295 tmp = cpu_to_le32(cap);
2296 memcpy(pos, &tmp, sizeof(u32));
2297 pos += sizeof(u32);
2298
2299 /* VHT MCS set */
2300 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2301 pos += sizeof(vht_cap->vht_mcs);
2302
2303 return pos;
2304}
2305
074d46d1 2306u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2307 const struct cfg80211_chan_def *chandef,
431e3154 2308 u16 prot_mode)
42e7aa77 2309{
074d46d1 2310 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2311 /* Build HT Information */
074d46d1
JB		 2312 *pos++ = WLAN_EID_HT_OPERATION;
2313 *pos++ = sizeof(struct ieee80211_ht_operation);
2314 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2315 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2316 chandef->chan->center_freq);
2317 switch (chandef->width) {
2318 case NL80211_CHAN_WIDTH_160:
2319 case NL80211_CHAN_WIDTH_80P80:
2320 case NL80211_CHAN_WIDTH_80:
2321 case NL80211_CHAN_WIDTH_40:
2322 if (chandef->center_freq1 > chandef->chan->center_freq)
2323 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2324 else
2325 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2326 break;
42e7aa77 2327 default:
074d46d1 2328 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2329 break;
2330 }
aee286c2 2331 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2332 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2333 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2334 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2335
431e3154 2336 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2337 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2338
2339 /* It seems that Basic MCS set and Supported MCS set
2340 are identical for the first 10 bytes */
074d46d1
JB		 2341 memset(&ht_oper->basic_set, 0, 16);
2342 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2343
074d46d1 2344 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2345}
2346
fb28ec0c
AN		 2347u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2348 const struct cfg80211_chan_def *chandef)
2349{
2350 struct ieee80211_vht_operation *vht_oper;
2351
2352 *pos++ = WLAN_EID_VHT_OPERATION;
2353 *pos++ = sizeof(struct ieee80211_vht_operation);
2354 vht_oper = (struct ieee80211_vht_operation *)pos;
2355 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2356 chandef->center_freq1);
2357 if (chandef->center_freq2)
2358 vht_oper->center_freq_seg2_idx =
2359 ieee80211_frequency_to_channel(chandef->center_freq2);
2360
2361 switch (chandef->width) {
2362 case NL80211_CHAN_WIDTH_160:
2363 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2364 break;
2365 case NL80211_CHAN_WIDTH_80P80:
2366 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2367 break;
2368 case NL80211_CHAN_WIDTH_80:
2369 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2370 break;
2371 default:
2372 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2373 break;
2374 }
2375
2376 /* don't require special VHT peer rates */
2377 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2378
2379 return pos + sizeof(struct ieee80211_vht_operation);
2380}
2381
4bf88530 2382void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2383 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2384 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2385{
2386 enum nl80211_channel_type channel_type;
2387
4bf88530
JB		 2388 if (!ht_oper) {
2389 cfg80211_chandef_create(chandef, control_chan,
2390 NL80211_CHAN_NO_HT);
2391 return;
2392 }
42e7aa77 2393
074d46d1 2394 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2395 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2396 channel_type = NL80211_CHAN_HT20;
2397 break;
2398 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2399 channel_type = NL80211_CHAN_HT40PLUS;
2400 break;
2401 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2402 channel_type = NL80211_CHAN_HT40MINUS;
2403 break;
2404 default:
2405 channel_type = NL80211_CHAN_NO_HT;
2406 }
2407
4bf88530 2408 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2409}
2410
abcff6ef
JD		 2411void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2412 const struct ieee80211_vht_operation *oper,
2413 struct cfg80211_chan_def *chandef)
2414{
2415 if (!oper)
2416 return;
2417
2418 chandef->chan = control_chan;
2419
2420 switch (oper->chan_width) {
2421 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2422 break;
2423 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2424 chandef->width = NL80211_CHAN_WIDTH_80;
2425 break;
2426 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2427 chandef->width = NL80211_CHAN_WIDTH_160;
2428 break;
2429 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2430 chandef->width = NL80211_CHAN_WIDTH_80P80;
2431 break;
2432 default:
2433 break;
2434 }
2435
2436 chandef->center_freq1 =
2437 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2438 control_chan->band);
2439 chandef->center_freq2 =
2440 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2441 control_chan->band);
2442}
2443
2103dec1
SW		 2444int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2445 const struct ieee80211_supported_band *sband,
2446 const u8 *srates, int srates_len, u32 *rates)
2447{
2448 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2449 int shift = ieee80211_chandef_get_shift(chandef);
2450 struct ieee80211_rate *br;
2451 int brate, rate, i, j, count = 0;
2452
2453 *rates = 0;
2454
2455 for (i = 0; i < srates_len; i++) {
2456 rate = srates[i] & 0x7f;
2457
2458 for (j = 0; j < sband->n_bitrates; j++) {
2459 br = &sband->bitrates[j];
2460 if ((rate_flags & br->flags) != rate_flags)
2461 continue;
2462
2463 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2464 if (brate == rate) {
2465 *rates |= BIT(j);
2466 count++;
2467 break;
2468 }
2469 }
2470 }
2471 return count;
2472}
2473
fc8a7321 2474int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2475 struct sk_buff *skb, bool need_basic,
2476 enum ieee80211_band band)
768db343 2477{
768db343
AN		 2478 struct ieee80211_local *local = sdata->local;
2479 struct ieee80211_supported_band *sband;
2103dec1 2480 int rate, shift;
768db343 2481 u8 i, rates, *pos;
fc8a7321 2482 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2483 u32 rate_flags;
768db343 2484
2103dec1
SW		 2485 shift = ieee80211_vif_get_shift(&sdata->vif);
2486 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2487 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2488 rates = 0;
2489 for (i = 0; i < sband->n_bitrates; i++) {
2490 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2491 continue;
2492 rates++;
2493 }
768db343
AN		 2494 if (rates > 8)
2495 rates = 8;
2496
2497 if (skb_tailroom(skb) < rates + 2)
2498 return -ENOMEM;
2499
2500 pos = skb_put(skb, rates + 2);
2501 *pos++ = WLAN_EID_SUPP_RATES;
2502 *pos++ = rates;
2503 for (i = 0; i < rates; i++) {
657c3e0c 2504 u8 basic = 0;
2103dec1
SW		 2505 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2506 continue;
2507
657c3e0c
AN		 2508 if (need_basic && basic_rates & BIT(i))
2509 basic = 0x80;
768db343 2510 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2511 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2512 5 * (1 << shift));
2513 *pos++ = basic | (u8) rate;
768db343
AN		 2514 }
2515
2516 return 0;
2517}
2518
fc8a7321 2519int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2520 struct sk_buff *skb, bool need_basic,
2521 enum ieee80211_band band)
768db343 2522{
768db343
AN		 2523 struct ieee80211_local *local = sdata->local;
2524 struct ieee80211_supported_band *sband;
cc63ec76 2525 int rate, shift;
768db343 2526 u8 i, exrates, *pos;
fc8a7321 2527 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2528 u32 rate_flags;
2529
2530 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2531 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2532
6b77863b 2533 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2534 exrates = 0;
2535 for (i = 0; i < sband->n_bitrates; i++) {
2536 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2537 continue;
2538 exrates++;
2539 }
2540
768db343
AN		 2541 if (exrates > 8)
2542 exrates -= 8;
2543 else
2544 exrates = 0;
2545
2546 if (skb_tailroom(skb) < exrates + 2)
2547 return -ENOMEM;
2548
2549 if (exrates) {
2550 pos = skb_put(skb, exrates + 2);
2551 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2552 *pos++ = exrates;
2553 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2554 u8 basic = 0;
2103dec1
SW		 2555 if ((rate_flags & sband->bitrates[i].flags)
2556 != rate_flags)
2557 continue;
657c3e0c
AN		 2558 if (need_basic && basic_rates & BIT(i))
2559 basic = 0x80;
2103dec1
SW		 2560 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2561 5 * (1 << shift));
2562 *pos++ = basic | (u8) rate;
768db343
AN		 2563 }
2564 }
2565 return 0;
2566}
1dae27f8
WYG		 2567
2568int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2569{
2570 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2571 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2572
be6bcabc
WYG		 2573 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2574 /* non-managed type inferfaces */
2575 return 0;
2576 }
3a7bba64 2577 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2578}
0d8a0a17 2579EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2580
2581u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2582{
2583 if (!mcs)
2584 return 1;
2585
2586 /* TODO: consider rx_highest */
2587
2588 if (mcs->rx_mask[3])
2589 return 4;
2590 if (mcs->rx_mask[2])
2591 return 3;
2592 if (mcs->rx_mask[1])
2593 return 2;
2594 return 1;
2595}
f4bda337
TP		 2596
2597/**
2598 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2599 * @local: mac80211 hw info struct
2600 * @status: RX status
2601 * @mpdu_len: total MPDU length (including FCS)
2602 * @mpdu_offset: offset into MPDU to calculate timestamp at
2603 *
2604 * This function calculates the RX timestamp at the given MPDU offset, taking
2605 * into account what the RX timestamp was. An offset of 0 will just normalize
2606 * the timestamp to TSF at beginning of MPDU reception.
2607 */
2608u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2609 struct ieee80211_rx_status *status,
2610 unsigned int mpdu_len,
2611 unsigned int mpdu_offset)
2612{
2613 u64 ts = status->mactime;
2614 struct rate_info ri;
2615 u16 rate;
2616
2617 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2618 return 0;
2619
2620 memset(&ri, 0, sizeof(ri));
2621
2622 /* Fill cfg80211 rate info */
2623 if (status->flag & RX_FLAG_HT) {
2624 ri.mcs = status->rate_idx;
2625 ri.flags |= RATE_INFO_FLAGS_MCS;
2626 if (status->flag & RX_FLAG_40MHZ)
b51f3bee
JB		 2627 ri.bw = RATE_INFO_BW_40;
2628 else
2629 ri.bw = RATE_INFO_BW_20;
f4bda337
TP		 2630 if (status->flag & RX_FLAG_SHORT_GI)
2631 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2632 } else if (status->flag & RX_FLAG_VHT) {
2633 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2634 ri.mcs = status->rate_idx;
2635 ri.nss = status->vht_nss;
2636 if (status->flag & RX_FLAG_40MHZ)
b51f3bee
JB		 2637 ri.bw = RATE_INFO_BW_40;
2638 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2639 ri.bw = RATE_INFO_BW_80;
2640 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2641 ri.bw = RATE_INFO_BW_160;
2642 else
2643 ri.bw = RATE_INFO_BW_20;
5614618e
JB		 2644 if (status->flag & RX_FLAG_SHORT_GI)
2645 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2646 } else {
2647 struct ieee80211_supported_band *sband;
2103dec1
SW		 2648 int shift = 0;
2649 int bitrate;
2650
b51f3bee 2651 if (status->flag & RX_FLAG_10MHZ) {
2103dec1 2652 shift = 1;
b51f3bee
JB		 2653 ri.bw = RATE_INFO_BW_10;
2654 } else if (status->flag & RX_FLAG_5MHZ) {
2103dec1 2655 shift = 2;
b51f3bee
JB		 2656 ri.bw = RATE_INFO_BW_5;
2657 } else {
2658 ri.bw = RATE_INFO_BW_20;
2659 }
f4bda337
TP		 2660
2661 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2662 bitrate = sband->bitrates[status->rate_idx].bitrate;
2663 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2664 }
2665
2666 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2667 if (WARN_ONCE(!rate,
2668 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2669 status->flag, status->rate_idx, status->vht_nss))
2670 return 0;
f4bda337
TP		 2671
2672 /* rewind from end of MPDU */
2673 if (status->flag & RX_FLAG_MACTIME_END)
2674 ts -= mpdu_len * 8 * 10 / rate;
2675
2676 ts += mpdu_offset * 8 * 10 / rate;
2677
2678 return ts;
2679}
164eb02d
SW		 2680
2681void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2682{
2683 struct ieee80211_sub_if_data *sdata;
d2859df5 2684 struct cfg80211_chan_def chandef;
164eb02d 2685
34a3740d 2686 mutex_lock(&local->mtx);
164eb02d
SW		 2687 mutex_lock(&local->iflist_mtx);
2688 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2689 /* it might be waiting for the local->mtx, but then
2690 * by the time it gets it, sdata->wdev.cac_started
2691 * will no longer be true
2692 */
2693 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2694
2695 if (sdata->wdev.cac_started) {
d2859df5 2696 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2697 ieee80211_vif_release_channel(sdata);
2698 cfg80211_cac_event(sdata->dev,
d2859df5 2699 &chandef,
164eb02d
SW		 2700 NL80211_RADAR_CAC_ABORTED,
2701 GFP_KERNEL);
2702 }
2703 }
2704 mutex_unlock(&local->iflist_mtx);
34a3740d 2705 mutex_unlock(&local->mtx);
164eb02d
SW		 2706}
2707
2708void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2709{
2710 struct ieee80211_local *local =
2711 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2712 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2713 struct ieee80211_chanctx *ctx;
2714 int num_chanctx = 0;
2715
2716 mutex_lock(&local->chanctx_mtx);
2717 list_for_each_entry(ctx, &local->chanctx_list, list) {
2718 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2719 continue;
2720
2721 num_chanctx++;
2722 chandef = ctx->conf.def;
2723 }
2724 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2725
2726 ieee80211_dfs_cac_cancel(local);
2727
486cf4c0
MK		 2728 if (num_chanctx > 1)
2729 /* XXX: multi-channel is not supported yet */
164eb02d 2730 WARN_ON(1);
84a3d1c9 2731 else
164eb02d 2732 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2733}
2734
2735void ieee80211_radar_detected(struct ieee80211_hw *hw)
2736{
2737 struct ieee80211_local *local = hw_to_local(hw);
2738
2739 trace_api_radar_detected(local);
2740
2741 ieee80211_queue_work(hw, &local->radar_detected_work);
2742}
2743EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2744
2745u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2746{
2747 u32 ret;
2748 int tmp;
2749
2750 switch (c->width) {
2751 case NL80211_CHAN_WIDTH_20:
2752 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2753 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2754 break;
2755 case NL80211_CHAN_WIDTH_40:
2756 c->width = NL80211_CHAN_WIDTH_20;
2757 c->center_freq1 = c->chan->center_freq;
2758 ret = IEEE80211_STA_DISABLE_40MHZ |
2759 IEEE80211_STA_DISABLE_VHT;
2760 break;
2761 case NL80211_CHAN_WIDTH_80:
2762 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2763 /* n_P40 */
2764 tmp /= 2;
2765 /* freq_P40 */
2766 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2767 c->width = NL80211_CHAN_WIDTH_40;
2768 ret = IEEE80211_STA_DISABLE_VHT;
2769 break;
2770 case NL80211_CHAN_WIDTH_80P80:
2771 c->center_freq2 = 0;
2772 c->width = NL80211_CHAN_WIDTH_80;
2773 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2774 IEEE80211_STA_DISABLE_160MHZ;
2775 break;
2776 case NL80211_CHAN_WIDTH_160:
2777 /* n_P20 */
2778 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2779 /* n_P80 */
2780 tmp /= 4;
2781 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2782 c->width = NL80211_CHAN_WIDTH_80;
2783 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2784 IEEE80211_STA_DISABLE_160MHZ;
2785 break;
2786 default:
2787 case NL80211_CHAN_WIDTH_20_NOHT:
2788 WARN_ON_ONCE(1);
2789 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2790 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2791 break;
2792 case NL80211_CHAN_WIDTH_5:
2793 case NL80211_CHAN_WIDTH_10:
2794 WARN_ON_ONCE(1);
2795 /* keep c->width */
2796 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2797 break;
2798 }
2799
2800 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2801
2802 return ret;
2803}
687da132
EG		 2804
2805/*
2806 * Returns true if smps_mode_new is strictly more restrictive than
2807 * smps_mode_old.
2808 */
2809bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2810 enum ieee80211_smps_mode smps_mode_new)
2811{
2812 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2813 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2814 return false;
2815
2816 switch (smps_mode_old) {
2817 case IEEE80211_SMPS_STATIC:
2818 return false;
2819 case IEEE80211_SMPS_DYNAMIC:
2820 return smps_mode_new == IEEE80211_SMPS_STATIC;
2821 case IEEE80211_SMPS_OFF:
2822 return smps_mode_new != IEEE80211_SMPS_OFF;
2823 default:
2824 WARN_ON(1);
2825 }
2826
2827 return false;
2828}
c6da674a
CYY		 2829
2830int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2831 struct cfg80211_csa_settings *csa_settings)
2832{
2833 struct sk_buff *skb;
2834 struct ieee80211_mgmt *mgmt;
2835 struct ieee80211_local *local = sdata->local;
2836 int freq;
2837 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2838 sizeof(mgmt->u.action.u.chan_switch);
2839 u8 *pos;
2840
2841 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2842 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2843 return -EOPNOTSUPP;
2844
2845 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2846 5 + /* channel switch announcement element */
2847 3 + /* secondary channel offset element */
2848 8); /* mesh channel switch parameters element */
2849 if (!skb)
2850 return -ENOMEM;
2851
2852 skb_reserve(skb, local->tx_headroom);
2853 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2854 memset(mgmt, 0, hdr_len);
2855 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2856 IEEE80211_STYPE_ACTION);
2857
2858 eth_broadcast_addr(mgmt->da);
2859 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2860 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2861 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2862 } else {
2863 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2864 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2865 }
2866 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2867 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2868 pos = skb_put(skb, 5);
2869 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2870 *pos++ = 3; /* IE length */
2871 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2872 freq = csa_settings->chandef.chan->center_freq;
2873 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2874 *pos++ = csa_settings->count; /* count */
2875
2876 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2877 enum nl80211_channel_type ch_type;
2878
2879 skb_put(skb, 3);
2880 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2881 *pos++ = 1; /* IE length */
2882 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2883 if (ch_type == NL80211_CHAN_HT40PLUS)
2884 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2885 else
2886 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2887 }
2888
2889 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2890 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2891
2892 skb_put(skb, 8);
2893 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2894 *pos++ = 6; /* IE length */
2895 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2896 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2897 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2898 *pos++ |= csa_settings->block_tx ?
2899 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2900 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2901 pos += 2;
ca91dc97 2902 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2903 pos += 2;
c6da674a
CYY		 2904 }
2905
2906 ieee80211_tx_skb(sdata, skb);
2907 return 0;
2908}
2475b1cc
MS		 2909
2910bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2911{
2912 return !(cs == NULL || cs->cipher == 0 ||
2913 cs->hdr_len < cs->pn_len + cs->pn_off ||
2914 cs->hdr_len <= cs->key_idx_off ||
2915 cs->key_idx_shift > 7 ||
2916 cs->key_idx_mask == 0);
2917}
2918
2919bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2920{
2921 int i;
2922
2923 /* Ensure we have enough iftype bitmap space for all iftype values */
2924 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2925
2926 for (i = 0; i < n; i++)
2927 if (!ieee80211_cs_valid(&cs[i]))
2928 return false;
2929
2930 return true;
2931}
2932
2933const struct ieee80211_cipher_scheme *
2934ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2935 enum nl80211_iftype iftype)
2936{
2937 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2938 int n = local->hw.n_cipher_schemes;
2939 int i;
2940 const struct ieee80211_cipher_scheme *cs = NULL;
2941
2942 for (i = 0; i < n; i++) {
2943 if (l[i].cipher == cipher) {
2944 cs = &l[i];
2945 break;
2946 }
2947 }
2948
2949 if (!cs || !(cs->iftype & BIT(iftype)))
2950 return NULL;
2951
2952 return cs;
2953}
2954
2955int ieee80211_cs_headroom(struct ieee80211_local *local,
2956 struct cfg80211_crypto_settings *crypto,
2957 enum nl80211_iftype iftype)
2958{
2959 const struct ieee80211_cipher_scheme *cs;
2960 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2961 int i;
2962
2963 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2964 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2965 iftype);
2966
2967 if (cs && headroom < cs->hdr_len)
2968 headroom = cs->hdr_len;
2969 }
2970
2971 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2972 if (cs && headroom < cs->hdr_len)
2973 headroom = cs->hdr_len;
2974
2975 return headroom;
2976}
a7022e65
FF		 2977
2978static bool
2979ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2980{
2981 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2982 int skip;
2983
2984 if (end > 0)
2985 return false;
2986
2987 /* End time is in the past, check for repetitions */
2988 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2989 if (data->count[i] < 255) {
2990 if (data->count[i] <= skip) {
2991 data->count[i] = 0;
2992 return false;
2993 }
2994
2995 data->count[i] -= skip;
2996 }
2997
2998 data->desc[i].start += skip * data->desc[i].interval;
2999
3000 return true;
3001}
3002
3003static bool
3004ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3005 s32 *offset)
3006{
3007 bool ret = false;
3008 int i;
3009
3010 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3011 s32 cur;
3012
3013 if (!data->count[i])
3014 continue;
3015
3016 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3017 ret = true;
3018
3019 cur = data->desc[i].start - tsf;
3020 if (cur > *offset)
3021 continue;
3022
3023 cur = data->desc[i].start + data->desc[i].duration - tsf;
3024 if (cur > *offset)
3025 *offset = cur;
3026 }
3027
3028 return ret;
3029}
3030
3031static u32
3032ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3033{
3034 s32 offset = 0;
3035 int tries = 0;
3036 /*
3037 * arbitrary limit, used to avoid infinite loops when combined NoA
3038 * descriptors cover the full time period.
3039 */
3040 int max_tries = 5;
3041
3042 ieee80211_extend_absent_time(data, tsf, &offset);
3043 do {
3044 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3045 break;
3046
3047 tries++;
3048 } while (tries < max_tries);
3049
3050 return offset;
3051}
3052
3053void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3054{
3055 u32 next_offset = BIT(31) - 1;
3056 int i;
3057
3058 data->absent = 0;
3059 data->has_next_tsf = false;
3060 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3061 s32 start;
3062
3063 if (!data->count[i])
3064 continue;
3065
3066 ieee80211_extend_noa_desc(data, tsf, i);
3067 start = data->desc[i].start - tsf;
3068 if (start <= 0)
3069 data->absent |= BIT(i);
3070
3071 if (next_offset > start)
3072 next_offset = start;
3073
3074 data->has_next_tsf = true;
3075 }
3076
3077 if (data->absent)
3078 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3079
3080 data->next_tsf = tsf + next_offset;
3081}
3082EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3083
3084int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3085 struct ieee80211_noa_data *data, u32 tsf)
3086{
3087 int ret = 0;
3088 int i;
3089
3090 memset(data, 0, sizeof(*data));
3091
3092 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3093 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3094
3095 if (!desc->count || !desc->duration)
3096 continue;
3097
3098 data->count[i] = desc->count;
3099 data->desc[i].start = le32_to_cpu(desc->start_time);
3100 data->desc[i].duration = le32_to_cpu(desc->duration);
3101 data->desc[i].interval = le32_to_cpu(desc->interval);
3102
3103 if (data->count[i] > 1 &&
3104 data->desc[i].interval < data->desc[i].duration)
3105 continue;
3106
3107 ieee80211_extend_noa_desc(data, tsf, i);
3108 ret++;
3109 }
3110
3111 if (ret)
3112 ieee80211_update_p2p_noa(data, tsf);
3113
3114 return ret;
3115}
3116EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 3117
3118void ieee80211_recalc_dtim(struct ieee80211_local *local,
3119 struct ieee80211_sub_if_data *sdata)
3120{
3121 u64 tsf = drv_get_tsf(local, sdata);
3122 u64 dtim_count = 0;
3123 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3124 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3125 struct ps_data *ps;
3126 u8 bcns_from_dtim;
3127
3128 if (tsf == -1ULL || !beacon_int || !dtim_period)
3129 return;
3130
3131 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3132 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3133 if (!sdata->bss)
3134 return;
3135
3136 ps = &sdata->bss->ps;
3137 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3138 ps = &sdata->u.mesh.ps;
3139 } else {
3140 return;
3141 }
3142
3143 /*
3144 * actually finds last dtim_count, mac80211 will update in
3145 * __beacon_add_tim().
3146 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3147 */
3148 do_div(tsf, beacon_int);
3149 bcns_from_dtim = do_div(tsf, dtim_period);
3150 /* just had a DTIM */
3151 if (!bcns_from_dtim)
3152 dtim_count = 0;
3153 else
3154 dtim_count = dtim_period - bcns_from_dtim;
3155
3156 ps->dtim_count = dtim_count;
3157}
73de86a3 3158
71e6195e
MK		 3159static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3160 struct ieee80211_chanctx *ctx)
3161{
3162 struct ieee80211_sub_if_data *sdata;
3163 u8 radar_detect = 0;
3164
3165 lockdep_assert_held(&local->chanctx_mtx);
3166
3167 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3168 return 0;
3169
3170 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3171 if (sdata->reserved_radar_required)
3172 radar_detect |= BIT(sdata->reserved_chandef.width);
3173
3174 /*
3175 * An in-place reservation context should not have any assigned vifs
3176 * until it replaces the other context.
3177 */
3178 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3179 !list_empty(&ctx->assigned_vifs));
3180
3181 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3182 if (sdata->radar_required)
3183 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3184
3185 return radar_detect;
3186}
3187
73de86a3
LC		 3188int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3189 const struct cfg80211_chan_def *chandef,
3190 enum ieee80211_chanctx_mode chanmode,
3191 u8 radar_detect)
3192{
3193 struct ieee80211_local *local = sdata->local;
3194 struct ieee80211_sub_if_data *sdata_iter;
3195 enum nl80211_iftype iftype = sdata->wdev.iftype;
3196 int num[NUM_NL80211_IFTYPES];
3197 struct ieee80211_chanctx *ctx;
b6a55015 3198 int num_different_channels = 0;
73de86a3
LC		 3199 int total = 1;
3200
3201 lockdep_assert_held(&local->chanctx_mtx);
3202
3203 if (WARN_ON(hweight32(radar_detect) > 1))
3204 return -EINVAL;
3205
b6a55015
LC		 3206 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3207 !chandef->chan))
73de86a3
LC		 3208 return -EINVAL;
3209
b6a55015
LC		 3210 if (chandef)
3211 num_different_channels = 1;
3212
73de86a3
LC		 3213 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3214 return -EINVAL;
3215
3216 /* Always allow software iftypes */
3217 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3218 if (radar_detect)
3219 return -EINVAL;
3220 return 0;
3221 }
3222
3223 memset(num, 0, sizeof(num));
3224
3225 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3226 num[iftype] = 1;
3227
3228 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3229 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3230 continue;
71e6195e 3231 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3232 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3233 num_different_channels++;
3234 continue;
3235 }
b6a55015 3236 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3237 cfg80211_chandef_compatible(chandef,
3238 &ctx->conf.def))
3239 continue;
3240 num_different_channels++;
3241 }
3242
3243 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3244 struct wireless_dev *wdev_iter;
3245
3246 wdev_iter = &sdata_iter->wdev;
3247
3248 if (sdata_iter == sdata ||
0f611d28 3249 !ieee80211_sdata_running(sdata_iter) ||
73de86a3
LC		 3250 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3251 continue;
3252
3253 num[wdev_iter->iftype]++;
3254 total++;
3255 }
3256
3257 if (total == 1 && !radar_detect)
3258 return 0;
3259
3260 return cfg80211_check_combinations(local->hw.wiphy,
3261 num_different_channels,
3262 radar_detect, num);
3263}
6fa001bc
MK		 3264
3265static void
3266ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3267 void *data)
3268{
3269 u32 *max_num_different_channels = data;
3270
3271 *max_num_different_channels = max(*max_num_different_channels,
3272 c->num_different_channels);
3273}
3274
3275int ieee80211_max_num_channels(struct ieee80211_local *local)
3276{
3277 struct ieee80211_sub_if_data *sdata;
3278 int num[NUM_NL80211_IFTYPES] = {};
3279 struct ieee80211_chanctx *ctx;
3280 int num_different_channels = 0;
3281 u8 radar_detect = 0;
3282 u32 max_num_different_channels = 1;
3283 int err;
3284
3285 lockdep_assert_held(&local->chanctx_mtx);
3286
3287 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3288 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3289 continue;
3290
6fa001bc
MK		 3291 num_different_channels++;
3292
71e6195e 3293 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3294 }
3295
3296 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3297 num[sdata->wdev.iftype]++;
3298
3299 err = cfg80211_iter_combinations(local->hw.wiphy,
3300 num_different_channels, radar_detect,
3301 num, ieee80211_iter_max_chans,
3302 &max_num_different_channels);
3303 if (err < 0)
3304 return err;
3305
3306 return max_num_different_channels;
3307}
40b861a0
AN		 3308
3309u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3310{
3311 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3312 *buf++ = 7; /* len */
3313 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3314 *buf++ = 0x50;
3315 *buf++ = 0xf2;
3316 *buf++ = 2; /* WME */
3317 *buf++ = 0; /* WME info */
3318 *buf++ = 1; /* WME ver */
3319 *buf++ = qosinfo; /* U-APSD no in use */
3320
3321 return buf;
3322}
ba8c3d6f
FF		 3323
3324void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3325 struct sta_info *sta,
3326 struct txq_info *txqi, int tid)
3327{
3328 skb_queue_head_init(&txqi->queue);
3329 txqi->txq.vif = &sdata->vif;
3330
3331 if (sta) {
3332 txqi->txq.sta = &sta->sta;
3333 sta->sta.txq[tid] = &txqi->txq;
3334 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3335 } else {
3336 sdata->vif.txq = &txqi->txq;
3337 txqi->txq.ac = IEEE80211_AC_BE;
3338 }
3339}
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