projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: reduce log spam from ieee80211_handle_pwr_constr
[deliverable/linux.git] / net / mac80211 / util.c
CommitLineData
c2d1560a
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318}
319
ce7c9111 320static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 321 enum queue_stop_reason reason,
322 bool refcounted)
c2d1560a
JB		 323{
324 struct ieee80211_local *local = hw_to_local(hw);
325
b5878a2d
JB		 326 trace_wake_queue(local, queue, reason);
327
e4e72fb4
JB		 328 if (WARN_ON(queue >= hw->queues))
329 return;
ce7c9111 330
ada15125
JB		 331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
cca07b00
LC		 334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
96f5e66e
JB		 341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
7236fe29
JB		 346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
3a25a8c8 348 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 349 rcu_read_unlock();
350 } else
3b8d81e0 351 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 352}
ce7c9111 353
96f5e66e 354void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 355 enum queue_stop_reason reason,
356 bool refcounted)
ce7c9111
KV		 357{
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364}
365
366void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367{
368 ieee80211_wake_queue_by_reason(hw, queue,
cca07b00
LC		 369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
ce7c9111 371}
c2d1560a
JB		 372EXPORT_SYMBOL(ieee80211_wake_queue);
373
ce7c9111 374static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 375 enum queue_stop_reason reason,
376 bool refcounted)
c2d1560a
JB		 377{
378 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 379 struct ieee80211_sub_if_data *sdata;
a6f38ac3 380 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 381
b5878a2d
JB		 382 trace_stop_queue(local, queue, reason);
383
e4e72fb4
JB		 384 if (WARN_ON(queue >= hw->queues))
385 return;
96f5e66e 386
cca07b00
LC		 387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
ada15125 391
cca07b00
LC		 392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
cf0277e7 394
a6f38ac3
JB		 395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
cf0277e7 398 rcu_read_lock();
3a25a8c8
JB		 399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
f142c6b9
JB		 402 if (!sdata->dev)
403 continue;
404
a6f38ac3 405 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
cf0277e7 411 rcu_read_unlock();
c2d1560a 412}
ce7c9111 413
96f5e66e 414void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 415 enum queue_stop_reason reason,
416 bool refcounted)
ce7c9111
KV		 417{
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424}
425
426void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427{
428 ieee80211_stop_queue_by_reason(hw, queue,
cca07b00
LC		 429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
ce7c9111 431}
c2d1560a
JB		 432EXPORT_SYMBOL(ieee80211_stop_queue);
433
8f77f384
JB		 434void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436{
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
a7bc376c 439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 440 int queue = info->hw_queue;
a7bc376c
JB		 441
442 if (WARN_ON(!info->control.vif)) {
d4fa14cd 443 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 444 return;
445 }
8f77f384
JB		 446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00
LC		 448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
3b8d81e0 450 __skb_queue_tail(&local->pending[queue], skb);
cca07b00
LC		 451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
8f77f384
JB		 453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454}
455
e3685e03
JB		 456void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
8f77f384
JB		 458{
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
b0b97a8a 462 int queue, i;
8f77f384
JB		 463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 465 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
d4fa14cd 469 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 470 continue;
471 }
472
3a25a8c8 473 queue = info->hw_queue;
4644ae89
JB		 474
475 __ieee80211_stop_queue(hw, queue,
cca07b00
LC		 476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
4644ae89 478
3b8d81e0 479 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 480 }
481
3b8d81e0 482 for (i = 0; i < hw->queues; i++)
8f77f384 483 __ieee80211_wake_queue(hw, i,
cca07b00
LC		 484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
8f77f384 486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 487}
488
ce7c9111 489void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 490 unsigned long queues,
cca07b00
LC		 491 enum queue_stop_reason reason,
492 bool refcounted)
c2d1560a 493{
ce7c9111
KV		 494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
c2d1560a
JB		 496 int i;
497
ce7c9111
KV		 498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
445ea4e8 500 for_each_set_bit(i, &queues, hw->queues)
cca07b00 501 __ieee80211_stop_queue(hw, i, reason, refcounted);
ce7c9111
KV		 502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504}
505
506void ieee80211_stop_queues(struct ieee80211_hw *hw)
507{
445ea4e8 508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
c2d1560a
JB		 511}
512EXPORT_SYMBOL(ieee80211_stop_queues);
513
92ab8535
TW		 514int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515{
516 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 517 unsigned long flags;
518 int ret;
96f5e66e 519
e4e72fb4
JB		 520 if (WARN_ON(queue >= hw->queues))
521 return true;
96f5e66e 522
3b8d81e0 523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
92ab8535
TW		 528}
529EXPORT_SYMBOL(ieee80211_queue_stopped);
530
ce7c9111 531void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 532 unsigned long queues,
cca07b00
LC		 533 enum queue_stop_reason reason,
534 bool refcounted)
c2d1560a 535{
ce7c9111
KV		 536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
c2d1560a
JB		 538 int i;
539
ce7c9111
KV		 540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
445ea4e8 542 for_each_set_bit(i, &queues, hw->queues)
cca07b00 543 __ieee80211_wake_queue(hw, i, reason, refcounted);
ce7c9111
KV		 544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546}
547
548void ieee80211_wake_queues(struct ieee80211_hw *hw)
549{
445ea4e8 550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
c2d1560a
JB		 553}
554EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 555
26da23b6
LC		 556static unsigned int
557ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
39ecc01d 559{
26da23b6 560 unsigned int queues;
39ecc01d
JB		 561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
26da23b6
LC		 576 return queues;
577}
578
4f9610d5
LK		 579void __ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
3b24f4c6 581 unsigned int queues, bool drop)
26da23b6 582{
26da23b6
LC		 583 if (!local->ops->flush)
584 return;
585
4f9610d5
LK		 586 /*
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
589 */
590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591 queues = ieee80211_get_vif_queues(local, sdata);
26da23b6 592
59f48fe2 593 ieee80211_stop_queues_by_reason(&local->hw, queues,
cca07b00
LC		 594 IEEE80211_QUEUE_STOP_REASON_FLUSH,
595 false);
445ea4e8 596
3b24f4c6 597 drv_flush(local, sdata, queues, drop);
445ea4e8 598
59f48fe2 599 ieee80211_wake_queues_by_reason(&local->hw, queues,
cca07b00
LC		 600 IEEE80211_QUEUE_STOP_REASON_FLUSH,
601 false);
39ecc01d
JB		 602}
603
4f9610d5 604void ieee80211_flush_queues(struct ieee80211_local *local,
3b24f4c6 605 struct ieee80211_sub_if_data *sdata, bool drop)
4f9610d5 606{
3b24f4c6 607 __ieee80211_flush_queues(local, sdata, 0, drop);
4f9610d5
LK		 608}
609
26da23b6
LC		 610void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611 struct ieee80211_sub_if_data *sdata,
612 enum queue_stop_reason reason)
613{
614 ieee80211_stop_queues_by_reason(&local->hw,
615 ieee80211_get_vif_queues(local, sdata),
616 reason, true);
617}
618
619void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata,
621 enum queue_stop_reason reason)
622{
623 ieee80211_wake_queues_by_reason(&local->hw,
624 ieee80211_get_vif_queues(local, sdata),
625 reason, true);
626}
627
3384d757
AN		 628static void __iterate_interfaces(struct ieee80211_local *local,
629 u32 iter_flags,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
632 void *data)
dabeb344 633{
dabeb344 634 struct ieee80211_sub_if_data *sdata;
3384d757 635 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
dabeb344 636
c7c71066 637 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 638 switch (sdata->vif.type) {
05c914fe 639 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 640 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
641 continue;
642 break;
05c914fe 643 case NL80211_IFTYPE_AP_VLAN:
2f561feb 644 continue;
2ca27bcf 645 default:
2f561feb
ID		 646 break;
647 }
8b2c9824 648 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
3384d757 649 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
8b2c9824 650 continue;
3384d757 651 if (ieee80211_sdata_running(sdata) || !active_only)
47846c9b 652 iterator(data, sdata->vif.addr,
2f561feb
ID		 653 &sdata->vif);
654 }
655
c7c71066
JB		 656 sdata = rcu_dereference_check(local->monitor_sdata,
657 lockdep_is_held(&local->iflist_mtx) ||
658 lockdep_rtnl_is_held());
8b2c9824 659 if (sdata &&
3384d757 660 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
8b2c9824 661 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 662 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 663}
685fb72b 664
3384d757 665void ieee80211_iterate_interfaces(
c7c71066
JB		 666 struct ieee80211_hw *hw, u32 iter_flags,
667 void (*iterator)(void *data, u8 *mac,
668 struct ieee80211_vif *vif),
669 void *data)
670{
671 struct ieee80211_local *local = hw_to_local(hw);
672
673 mutex_lock(&local->iflist_mtx);
3384d757 674 __iterate_interfaces(local, iter_flags, iterator, data);
c771c9d8 675 mutex_unlock(&local->iflist_mtx);
2f561feb 676}
3384d757 677EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
2f561feb
ID		 678
679void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 680 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 681 void (*iterator)(void *data, u8 *mac,
682 struct ieee80211_vif *vif),
683 void *data)
684{
685 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 686
e38bad47 687 rcu_read_lock();
3384d757
AN		 688 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
689 iterator, data);
c7c71066
JB		 690 rcu_read_unlock();
691}
692EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 693
c7c71066
JB		 694void ieee80211_iterate_active_interfaces_rtnl(
695 struct ieee80211_hw *hw, u32 iter_flags,
696 void (*iterator)(void *data, u8 *mac,
697 struct ieee80211_vif *vif),
698 void *data)
699{
700 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 701
c7c71066 702 ASSERT_RTNL();
685fb72b 703
3384d757
AN		 704 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
705 iterator, data);
dabeb344 706}
c7c71066 707EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 708
0fc1e049
AN		 709static void __iterate_stations(struct ieee80211_local *local,
710 void (*iterator)(void *data,
711 struct ieee80211_sta *sta),
712 void *data)
713{
714 struct sta_info *sta;
715
716 list_for_each_entry_rcu(sta, &local->sta_list, list) {
717 if (!sta->uploaded)
718 continue;
719
720 iterator(data, &sta->sta);
721 }
722}
723
724void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
725 void (*iterator)(void *data,
726 struct ieee80211_sta *sta),
727 void *data)
728{
729 struct ieee80211_local *local = hw_to_local(hw);
730
731 rcu_read_lock();
732 __iterate_stations(local, iterator, data);
733 rcu_read_unlock();
734}
735EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
736
ad7e718c
JB		 737struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
738{
739 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
740
741 if (!ieee80211_sdata_running(sdata) ||
742 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
743 return NULL;
744 return &sdata->vif;
745}
746EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
747
dc5a1ad7
EG		 748struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
749{
750 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
751
752 if (!ieee80211_sdata_running(sdata) ||
753 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
754 return NULL;
755
756 return &sdata->wdev;
757}
758EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
759
42935eca
LR		 760/*
761 * Nothing should have been stuffed into the workqueue during
4afaff17
EG		 762 * the suspend->resume cycle. Since we can't check each caller
763 * of this function if we are already quiescing / suspended,
764 * check here and don't WARN since this can actually happen when
765 * the rx path (for example) is racing against __ieee80211_suspend
766 * and suspending / quiescing was set after the rx path checked
767 * them.
42935eca
LR		 768 */
769static bool ieee80211_can_queue_work(struct ieee80211_local *local)
770{
4afaff17
EG		 771 if (local->quiescing || (local->suspended && !local->resuming)) {
772 pr_warn("queueing ieee80211 work while going to suspend\n");
ceb99fe0 773 return false;
4afaff17 774 }
42935eca
LR		 775
776 return true;
777}
778
779void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
780{
781 struct ieee80211_local *local = hw_to_local(hw);
782
783 if (!ieee80211_can_queue_work(local))
784 return;
785
786 queue_work(local->workqueue, work);
787}
788EXPORT_SYMBOL(ieee80211_queue_work);
789
790void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
791 struct delayed_work *dwork,
792 unsigned long delay)
793{
794 struct ieee80211_local *local = hw_to_local(hw);
795
796 if (!ieee80211_can_queue_work(local))
797 return;
798
799 queue_delayed_work(local->workqueue, dwork, delay);
800}
801EXPORT_SYMBOL(ieee80211_queue_delayed_work);
802
35d865af 803u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 804 struct ieee802_11_elems *elems,
805 u64 filter, u32 crc)
806{
807 size_t left = len;
35d865af 808 const u8 *pos = start;
dd76986b 809 bool calc_crc = filter != 0;
fcff4f10 810 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 811 const u8 *ie;
dd76986b 812
fcff4f10 813 bitmap_zero(seen_elems, 256);
dd76986b
JB		 814 memset(elems, 0, sizeof(*elems));
815 elems->ie_start = start;
816 elems->total_len = len;
817
818 while (left >= 2) {
819 u8 id, elen;
fcff4f10 820 bool elem_parse_failed;
dd76986b
JB		 821
822 id = *pos++;
823 elen = *pos++;
824 left -= 2;
825
fcff4f10
PS		 826 if (elen > left) {
827 elems->parse_error = true;
dd76986b 828 break;
fcff4f10
PS		 829 }
830
9690fb16
JB		 831 switch (id) {
832 case WLAN_EID_SSID:
833 case WLAN_EID_SUPP_RATES:
834 case WLAN_EID_FH_PARAMS:
835 case WLAN_EID_DS_PARAMS:
836 case WLAN_EID_CF_PARAMS:
837 case WLAN_EID_TIM:
838 case WLAN_EID_IBSS_PARAMS:
839 case WLAN_EID_CHALLENGE:
840 case WLAN_EID_RSN:
841 case WLAN_EID_ERP_INFO:
842 case WLAN_EID_EXT_SUPP_RATES:
843 case WLAN_EID_HT_CAPABILITY:
844 case WLAN_EID_HT_OPERATION:
845 case WLAN_EID_VHT_CAPABILITY:
846 case WLAN_EID_VHT_OPERATION:
847 case WLAN_EID_MESH_ID:
848 case WLAN_EID_MESH_CONFIG:
849 case WLAN_EID_PEER_MGMT:
850 case WLAN_EID_PREQ:
851 case WLAN_EID_PREP:
852 case WLAN_EID_PERR:
853 case WLAN_EID_RANN:
854 case WLAN_EID_CHANNEL_SWITCH:
855 case WLAN_EID_EXT_CHANSWITCH_ANN:
856 case WLAN_EID_COUNTRY:
857 case WLAN_EID_PWR_CONSTRAINT:
858 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 859 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 860 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 861 case WLAN_EID_CHAN_SWITCH_PARAM:
9041c1fa 862 case WLAN_EID_EXT_CAPABILITY:
53837584
AN		 863 case WLAN_EID_CHAN_SWITCH_TIMING:
864 case WLAN_EID_LINK_ID:
b2e506bf
JB		 865 /*
866 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
867 * that if the content gets bigger it might be needed more than once
868 */
9690fb16
JB		 869 if (test_bit(id, seen_elems)) {
870 elems->parse_error = true;
871 left -= elen;
872 pos += elen;
873 continue;
874 }
875 break;
fcff4f10 876 }
dd76986b
JB		 877
878 if (calc_crc && id < 64 && (filter & (1ULL << id)))
879 crc = crc32_be(crc, pos - 2, elen + 2);
880
fcff4f10
PS		 881 elem_parse_failed = false;
882
dd76986b 883 switch (id) {
53837584
AN		 884 case WLAN_EID_LINK_ID:
885 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
886 elem_parse_failed = true;
887 break;
888 }
889 elems->lnk_id = (void *)(pos - 2);
890 break;
891 case WLAN_EID_CHAN_SWITCH_TIMING:
892 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
893 elem_parse_failed = true;
894 break;
895 }
896 elems->ch_sw_timing = (void *)pos;
897 break;
9041c1fa
AN		 898 case WLAN_EID_EXT_CAPABILITY:
899 elems->ext_capab = pos;
900 elems->ext_capab_len = elen;
901 break;
dd76986b
JB		 902 case WLAN_EID_SSID:
903 elems->ssid = pos;
904 elems->ssid_len = elen;
905 break;
906 case WLAN_EID_SUPP_RATES:
907 elems->supp_rates = pos;
908 elems->supp_rates_len = elen;
909 break;
dd76986b 910 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 911 if (elen >= 1)
912 elems->ds_params = pos;
913 else
914 elem_parse_failed = true;
dd76986b 915 break;
dd76986b
JB		 916 case WLAN_EID_TIM:
917 if (elen >= sizeof(struct ieee80211_tim_ie)) {
918 elems->tim = (void *)pos;
919 elems->tim_len = elen;
fcff4f10
PS		 920 } else
921 elem_parse_failed = true;
dd76986b 922 break;
dd76986b
JB		 923 case WLAN_EID_CHALLENGE:
924 elems->challenge = pos;
925 elems->challenge_len = elen;
926 break;
927 case WLAN_EID_VENDOR_SPECIFIC:
928 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
929 pos[2] == 0xf2) {
930 /* Microsoft OUI (00:50:F2) */
931
932 if (calc_crc)
933 crc = crc32_be(crc, pos - 2, elen + 2);
934
441a33ba 935 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 936 /* OUI Type 2 - WMM IE */
937 if (pos[4] == 0) {
938 elems->wmm_info = pos;
939 elems->wmm_info_len = elen;
940 } else if (pos[4] == 1) {
941 elems->wmm_param = pos;
942 elems->wmm_param_len = elen;
943 }
944 }
945 }
946 break;
947 case WLAN_EID_RSN:
948 elems->rsn = pos;
949 elems->rsn_len = elen;
950 break;
951 case WLAN_EID_ERP_INFO:
1946bed9
JB		 952 if (elen >= 1)
953 elems->erp_info = pos;
954 else
955 elem_parse_failed = true;
dd76986b
JB		 956 break;
957 case WLAN_EID_EXT_SUPP_RATES:
958 elems->ext_supp_rates = pos;
959 elems->ext_supp_rates_len = elen;
960 break;
961 case WLAN_EID_HT_CAPABILITY:
962 if (elen >= sizeof(struct ieee80211_ht_cap))
963 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 964 else
965 elem_parse_failed = true;
dd76986b 966 break;
074d46d1
JB		 967 case WLAN_EID_HT_OPERATION:
968 if (elen >= sizeof(struct ieee80211_ht_operation))
969 elems->ht_operation = (void *)pos;
fcff4f10
PS		 970 else
971 elem_parse_failed = true;
dd76986b 972 break;
818255ea
MP		 973 case WLAN_EID_VHT_CAPABILITY:
974 if (elen >= sizeof(struct ieee80211_vht_cap))
975 elems->vht_cap_elem = (void *)pos;
976 else
977 elem_parse_failed = true;
978 break;
979 case WLAN_EID_VHT_OPERATION:
980 if (elen >= sizeof(struct ieee80211_vht_operation))
981 elems->vht_operation = (void *)pos;
982 else
983 elem_parse_failed = true;
984 break;
bee7f586
JB		 985 case WLAN_EID_OPMODE_NOTIF:
986 if (elen > 0)
987 elems->opmode_notif = pos;
988 else
989 elem_parse_failed = true;
990 break;
dd76986b
JB		 991 case WLAN_EID_MESH_ID:
992 elems->mesh_id = pos;
993 elems->mesh_id_len = elen;
994 break;
995 case WLAN_EID_MESH_CONFIG:
996 if (elen >= sizeof(struct ieee80211_meshconf_ie))
997 elems->mesh_config = (void *)pos;
fcff4f10
PS		 998 else
999 elem_parse_failed = true;
dd76986b
JB		 1000 break;
1001 case WLAN_EID_PEER_MGMT:
1002 elems->peering = pos;
1003 elems->peering_len = elen;
1004 break;
3f52b7e3
MP		 1005 case WLAN_EID_MESH_AWAKE_WINDOW:
1006 if (elen >= 2)
1007 elems->awake_window = (void *)pos;
1008 break;
dd76986b
JB		 1009 case WLAN_EID_PREQ:
1010 elems->preq = pos;
1011 elems->preq_len = elen;
1012 break;
1013 case WLAN_EID_PREP:
1014 elems->prep = pos;
1015 elems->prep_len = elen;
1016 break;
1017 case WLAN_EID_PERR:
1018 elems->perr = pos;
1019 elems->perr_len = elen;
1020 break;
1021 case WLAN_EID_RANN:
1022 if (elen >= sizeof(struct ieee80211_rann_ie))
1023 elems->rann = (void *)pos;
fcff4f10
PS		 1024 else
1025 elem_parse_failed = true;
dd76986b
JB		 1026 break;
1027 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 1028 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1029 elem_parse_failed = true;
1030 break;
1031 }
1032 elems->ch_switch_ie = (void *)pos;
dd76986b 1033 break;
b4f286a1
JB		 1034 case WLAN_EID_EXT_CHANSWITCH_ANN:
1035 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1036 elem_parse_failed = true;
1037 break;
1038 }
1039 elems->ext_chansw_ie = (void *)pos;
1040 break;
85220d71
JB		 1041 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1042 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1043 elem_parse_failed = true;
1044 break;
1045 }
1046 elems->sec_chan_offs = (void *)pos;
1047 break;
8f2535b9
CYY		 1048 case WLAN_EID_CHAN_SWITCH_PARAM:
1049 if (elen !=
1050 sizeof(*elems->mesh_chansw_params_ie)) {
1051 elem_parse_failed = true;
1052 break;
1053 }
1054 elems->mesh_chansw_params_ie = (void *)pos;
1055 break;
b2e506bf
JB		 1056 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1057 if (!action ||
1058 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1059 elem_parse_failed = true;
1060 break;
1061 }
1062 elems->wide_bw_chansw_ie = (void *)pos;
1063 break;
1064 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1065 if (action) {
1066 elem_parse_failed = true;
1067 break;
1068 }
1069 /*
1070 * This is a bit tricky, but as we only care about
1071 * the wide bandwidth channel switch element, so
1072 * just parse it out manually.
1073 */
1074 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1075 pos, elen);
1076 if (ie) {
1077 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1078 elems->wide_bw_chansw_ie =
1079 (void *)(ie + 2);
1080 else
1081 elem_parse_failed = true;
1082 }
1083 break;
dd76986b
JB		 1084 case WLAN_EID_COUNTRY:
1085 elems->country_elem = pos;
1086 elems->country_elem_len = elen;
1087 break;
1088 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1089 if (elen != 1) {
1090 elem_parse_failed = true;
1091 break;
1092 }
dd76986b 1093 elems->pwr_constr_elem = pos;
dd76986b 1094 break;
c8d65917
SG		 1095 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1096 /* Lots of different options exist, but we only care
1097 * about the Dynamic Transmit Power Control element.
1098 * First check for the Cisco OUI, then for the DTPC
1099 * tag (0x00).
1100 */
1101 if (elen < 4) {
1102 elem_parse_failed = true;
1103 break;
1104 }
1105
1106 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1107 pos[2] != 0x96 || pos[3] != 0x00)
1108 break;
1109
1110 if (elen != 6) {
1111 elem_parse_failed = true;
1112 break;
1113 }
1114
1115 if (calc_crc)
1116 crc = crc32_be(crc, pos - 2, elen + 2);
1117
1118 elems->cisco_dtpc_elem = pos;
1119 break;
dd76986b 1120 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1121 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1122 elems->timeout_int = (void *)pos;
1123 else
1124 elem_parse_failed = true;
dd76986b
JB		 1125 break;
1126 default:
1127 break;
1128 }
1129
fcff4f10
PS		 1130 if (elem_parse_failed)
1131 elems->parse_error = true;
1132 else
5df45690 1133 __set_bit(id, seen_elems);
fcff4f10 1134
dd76986b
JB		 1135 left -= elen;
1136 pos += elen;
1137 }
1138
fcff4f10
PS		 1139 if (left != 0)
1140 elems->parse_error = true;
1141
dd76986b
JB		 1142 return crc;
1143}
1144
3abead59
JB		 1145void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1146 bool bss_notify)
5825fe10
JB		 1147{
1148 struct ieee80211_local *local = sdata->local;
1149 struct ieee80211_tx_queue_params qparam;
55de908a 1150 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1151 int ac;
a8ce8544 1152 bool use_11b, enable_qos;
239281f8 1153 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
aa837e1d 1154 int aCWmin, aCWmax;
5825fe10
JB		 1155
1156 if (!local->ops->conf_tx)
1157 return;
1158
54bcbc69
JB		 1159 if (local->hw.queues < IEEE80211_NUM_ACS)
1160 return;
1161
5825fe10
JB		 1162 memset(&qparam, 0, sizeof(qparam));
1163
55de908a
JB		 1164 rcu_read_lock();
1165 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1166 use_11b = (chanctx_conf &&
4bf88530 1167 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1168 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1169 rcu_read_unlock();
5825fe10 1170
a8ce8544
SG		 1171 /*
1172 * By default disable QoS in STA mode for old access points, which do
1173 * not support 802.11e. New APs will provide proper queue parameters,
1174 * that we will configure later.
1175 */
1176 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1177
239281f8
RL		 1178 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1179
1f4ffde8
FZ		 1180 /* Set defaults according to 802.11-2007 Table 7-37 */
1181 aCWmax = 1023;
1182 if (use_11b)
1183 aCWmin = 31;
1184 else
1185 aCWmin = 15;
1186
1187 /* Confiure old 802.11b/g medium access rules. */
1188 qparam.cw_max = aCWmax;
1189 qparam.cw_min = aCWmin;
1190 qparam.txop = 0;
1191 qparam.aifs = 2;
aa837e1d 1192
1f4ffde8
FZ		 1193 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1194 /* Update if QoS is enabled. */
a8ce8544
SG		 1195 if (enable_qos) {
1196 switch (ac) {
1197 case IEEE80211_AC_BK:
1198 qparam.cw_max = aCWmax;
1199 qparam.cw_min = aCWmin;
1200 qparam.txop = 0;
239281f8
RL		 1201 if (is_ocb)
1202 qparam.aifs = 9;
1203 else
1204 qparam.aifs = 7;
a8ce8544
SG		 1205 break;
1206 /* never happens but let's not leave undefined */
1207 default:
1208 case IEEE80211_AC_BE:
1209 qparam.cw_max = aCWmax;
1210 qparam.cw_min = aCWmin;
1211 qparam.txop = 0;
239281f8
RL		 1212 if (is_ocb)
1213 qparam.aifs = 6;
1214 else
1215 qparam.aifs = 3;
a8ce8544
SG		 1216 break;
1217 case IEEE80211_AC_VI:
1218 qparam.cw_max = aCWmin;
1219 qparam.cw_min = (aCWmin + 1) / 2 - 1;
239281f8
RL		 1220 if (is_ocb)
1221 qparam.txop = 0;
1222 else if (use_11b)
a8ce8544
SG		 1223 qparam.txop = 6016/32;
1224 else
1225 qparam.txop = 3008/32;
239281f8
RL		 1226
1227 if (is_ocb)
1228 qparam.aifs = 3;
1229 else
1230 qparam.aifs = 2;
a8ce8544
SG		 1231 break;
1232 case IEEE80211_AC_VO:
1233 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1234 qparam.cw_min = (aCWmin + 1) / 4 - 1;
239281f8
RL		 1235 if (is_ocb)
1236 qparam.txop = 0;
1237 else if (use_11b)
a8ce8544
SG		 1238 qparam.txop = 3264/32;
1239 else
1240 qparam.txop = 1504/32;
1241 qparam.aifs = 2;
1242 break;
1243 }
aa837e1d 1244 }
5825fe10 1245
ab13315a
KV		 1246 qparam.uapsd = false;
1247
54bcbc69
JB		 1248 sdata->tx_conf[ac] = qparam;
1249 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1250 }
e1b3ec1a 1251
f142c6b9
JB		 1252 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1253 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1254 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1255 if (bss_notify)
1256 ieee80211_bss_info_change_notify(sdata,
1257 BSS_CHANGED_QOS);
d9734979 1258 }
5825fe10 1259}
e50db65c 1260
46900298 1261void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1262 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1263 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1264 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1265 u32 tx_flags)
46900298
JB		 1266{
1267 struct ieee80211_local *local = sdata->local;
1268 struct sk_buff *skb;
1269 struct ieee80211_mgmt *mgmt;
fffd0934 1270 int err;
46900298 1271
15e230ab 1272 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1273 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1274 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1275 if (!skb)
46900298 1276 return;
d15b8459 1277
744462a9 1278 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1279
1280 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1281 memset(mgmt, 0, 24 + 6);
1282 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1283 IEEE80211_STYPE_AUTH);
efa6a09d 1284 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1285 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1286 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1287 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1288 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1289 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1290 if (extra)
1291 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1292
fffd0934
JB		 1293 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1294 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1295 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1296 WARN_ON(err);
1297 }
1298
1672c0e3
JB		 1299 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1300 tx_flags;
62ae67be 1301 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1302}
1303
6ae16775
AQ		 1304void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1305 const u8 *bssid, u16 stype, u16 reason,
1306 bool send_frame, u8 *frame_buf)
1307{
1308 struct ieee80211_local *local = sdata->local;
1309 struct sk_buff *skb;
1310 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1311
1312 /* build frame */
1313 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1314 mgmt->duration = 0; /* initialize only */
1315 mgmt->seq_ctrl = 0; /* initialize only */
1316 memcpy(mgmt->da, bssid, ETH_ALEN);
1317 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1318 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1319 /* u.deauth.reason_code == u.disassoc.reason_code */
1320 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1321
1322 if (send_frame) {
1323 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1324 IEEE80211_DEAUTH_FRAME_LEN);
1325 if (!skb)
1326 return;
1327
1328 skb_reserve(skb, local->hw.extra_tx_headroom);
1329
1330 /* copy in frame */
1331 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1332 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1333
1334 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1335 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1336 IEEE80211_SKB_CB(skb)->flags |=
1337 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1338
1339 ieee80211_tx_skb(sdata, skb);
1340 }
1341}
1342
c56ef672
DS		 1343static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1344 u8 *buffer, size_t buffer_len,
1345 const u8 *ie, size_t ie_len,
1346 enum ieee80211_band band,
1347 u32 rate_mask,
1348 struct cfg80211_chan_def *chandef,
1349 size_t *offset)
de95a54b
JB		 1350{
1351 struct ieee80211_supported_band *sband;
c604b9f2 1352 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1353 size_t noffset;
8e664fb3 1354 int supp_rates_len, i;
8dcb2003
JM		 1355 u8 rates[32];
1356 int num_rates;
1357 int ext_rates_len;
2103dec1
SW		 1358 int shift;
1359 u32 rate_flags;
40a11ca8 1360 bool have_80mhz = false;
de95a54b 1361
c56ef672
DS		 1362 *offset = 0;
1363
4d36ec58 1364 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1365 if (WARN_ON_ONCE(!sband))
1366 return 0;
de95a54b 1367
2103dec1
SW		 1368 rate_flags = ieee80211_chandef_rate_flags(chandef);
1369 shift = ieee80211_chandef_get_shift(chandef);
1370
8dcb2003
JM		 1371 num_rates = 0;
1372 for (i = 0; i < sband->n_bitrates; i++) {
1373 if ((BIT(i) & rate_mask) == 0)
1374 continue; /* skip rate */
2103dec1
SW		 1375 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1376 continue;
1377
1378 rates[num_rates++] =
1379 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1380 (1 << shift) * 5);
8dcb2003
JM		 1381 }
1382
1383 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1384
c604b9f2
JB		 1385 if (end - pos < 2 + supp_rates_len)
1386 goto out_err;
de95a54b 1387 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1388 *pos++ = supp_rates_len;
8dcb2003
JM		 1389 memcpy(pos, rates, supp_rates_len);
1390 pos += supp_rates_len;
8e664fb3
JB		 1391
1392 /* insert "request information" if in custom IEs */
1393 if (ie && ie_len) {
1394 static const u8 before_extrates[] = {
1395 WLAN_EID_SSID,
1396 WLAN_EID_SUPP_RATES,
1397 WLAN_EID_REQUEST,
1398 };
1399 noffset = ieee80211_ie_split(ie, ie_len,
1400 before_extrates,
1401 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1402 *offset);
1403 if (end - pos < noffset - *offset)
c604b9f2 1404 goto out_err;
c56ef672
DS		 1405 memcpy(pos, ie + *offset, noffset - *offset);
1406 pos += noffset - *offset;
1407 *offset = noffset;
8e664fb3
JB		 1408 }
1409
8dcb2003
JM		 1410 ext_rates_len = num_rates - supp_rates_len;
1411 if (ext_rates_len > 0) {
c604b9f2
JB		 1412 if (end - pos < 2 + ext_rates_len)
1413 goto out_err;
8e664fb3 1414 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1415 *pos++ = ext_rates_len;
1416 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1417 pos += ext_rates_len;
8e664fb3
JB		 1418 }
1419
2103dec1 1420 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1421 if (end - pos < 3)
1422 goto out_err;
651b5225
JM		 1423 *pos++ = WLAN_EID_DS_PARAMS;
1424 *pos++ = 1;
2103dec1
SW		 1425 *pos++ = ieee80211_frequency_to_channel(
1426 chandef->chan->center_freq);
651b5225
JM		 1427 }
1428
8e664fb3
JB		 1429 /* insert custom IEs that go before HT */
1430 if (ie && ie_len) {
1431 static const u8 before_ht[] = {
1432 WLAN_EID_SSID,
1433 WLAN_EID_SUPP_RATES,
1434 WLAN_EID_REQUEST,
1435 WLAN_EID_EXT_SUPP_RATES,
1436 WLAN_EID_DS_PARAMS,
1437 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1438 };
1439 noffset = ieee80211_ie_split(ie, ie_len,
1440 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1441 *offset);
1442 if (end - pos < noffset - *offset)
c604b9f2 1443 goto out_err;
c56ef672
DS		 1444 memcpy(pos, ie + *offset, noffset - *offset);
1445 pos += noffset - *offset;
1446 *offset = noffset;
de95a54b
JB		 1447 }
1448
c604b9f2
JB		 1449 if (sband->ht_cap.ht_supported) {
1450 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1451 goto out_err;
ef96a842
BG		 1452 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1453 sband->ht_cap.cap);
c604b9f2 1454 }
5ef2d41a 1455
de95a54b
JB		 1456 /*
1457 * If adding more here, adjust code in main.c
1458 * that calculates local->scan_ies_len.
1459 */
1460
4d952300 1461 /* insert custom IEs that go before VHT */
8e664fb3 1462 if (ie && ie_len) {
4d952300
JB		 1463 static const u8 before_vht[] = {
1464 WLAN_EID_SSID,
1465 WLAN_EID_SUPP_RATES,
1466 WLAN_EID_REQUEST,
1467 WLAN_EID_EXT_SUPP_RATES,
1468 WLAN_EID_DS_PARAMS,
1469 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1470 WLAN_EID_HT_CAPABILITY,
1471 WLAN_EID_BSS_COEX_2040,
1472 WLAN_EID_EXT_CAPABILITY,
1473 WLAN_EID_SSID_LIST,
1474 WLAN_EID_CHANNEL_USAGE,
1475 WLAN_EID_INTERWORKING,
1476 /* mesh ID can't happen here */
1477 /* 60 GHz can't happen here right now */
1478 };
1479 noffset = ieee80211_ie_split(ie, ie_len,
1480 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1481 *offset);
1482 if (end - pos < noffset - *offset)
c604b9f2 1483 goto out_err;
c56ef672
DS		 1484 memcpy(pos, ie + *offset, noffset - *offset);
1485 pos += noffset - *offset;
1486 *offset = noffset;
de95a54b
JB		 1487 }
1488
40a11ca8
JB		 1489 /* Check if any channel in this sband supports at least 80 MHz */
1490 for (i = 0; i < sband->n_channels; i++) {
fa44b988
AN		 1491 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1492 IEEE80211_CHAN_NO_80MHZ))
1493 continue;
1494
1495 have_80mhz = true;
1496 break;
40a11ca8
JB		 1497 }
1498
1499 if (sband->vht_cap.vht_supported && have_80mhz) {
c604b9f2
JB		 1500 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1501 goto out_err;
ba0afa2f
MP		 1502 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1503 sband->vht_cap.cap);
c604b9f2 1504 }
ba0afa2f 1505
c604b9f2
JB		 1506 return pos - buffer;
1507 out_err:
1508 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1509 return pos - buffer;
1510}
1511
c56ef672
DS		 1512int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1513 size_t buffer_len,
1514 struct ieee80211_scan_ies *ie_desc,
1515 const u8 *ie, size_t ie_len,
1516 u8 bands_used, u32 *rate_masks,
1517 struct cfg80211_chan_def *chandef)
1518{
1519 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1520 int i;
1521
1522 memset(ie_desc, 0, sizeof(*ie_desc));
1523
1524 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1525 if (bands_used & BIT(i)) {
1526 pos += ieee80211_build_preq_ies_band(local,
1527 buffer + pos,
1528 buffer_len - pos,
1529 ie, ie_len, i,
1530 rate_masks[i],
1531 chandef,
1532 &custom_ie_offset);
1533 ie_desc->ies[i] = buffer + old_pos;
1534 ie_desc->len[i] = pos - old_pos;
1535 old_pos = pos;
1536 }
1537 }
1538
1539 /* add any remaining custom IEs */
1540 if (ie && ie_len) {
1541 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1542 "not enough space for preq custom IEs\n"))
1543 return pos;
1544 memcpy(buffer + pos, ie + custom_ie_offset,
1545 ie_len - custom_ie_offset);
1546 ie_desc->common_ies = buffer + pos;
1547 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1548 pos += ie_len - custom_ie_offset;
1549 }
1550
1551 return pos;
1552};
1553
a619a4c0 1554struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
a344d677
JB		 1555 const u8 *src, const u8 *dst,
1556 u32 ratemask,
6b77863b 1557 struct ieee80211_channel *chan,
a619a4c0 1558 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1559 const u8 *ie, size_t ie_len,
1560 bool directed)
46900298
JB		 1561{
1562 struct ieee80211_local *local = sdata->local;
2103dec1 1563 struct cfg80211_chan_def chandef;
46900298
JB		 1564 struct sk_buff *skb;
1565 struct ieee80211_mgmt *mgmt;
b9a9ada1 1566 int ies_len;
c56ef672
DS		 1567 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1568 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1569
a806c558
PS		 1570 /*
1571 * Do not send DS Channel parameter for directed probe requests
1572 * in order to maximize the chance that we get a response. Some
1573 * badly-behaved APs don't respond when this parameter is included.
1574 */
2103dec1 1575 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1576 if (directed)
2103dec1 1577 chandef.chan = NULL;
a806c558 1578 else
2103dec1 1579 chandef.chan = chan;
651b5225 1580
a344d677
JB		 1581 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1582 100 + ie_len);
5b2bbf75 1583 if (!skb)
b9a9ada1
JB		 1584 return NULL;
1585
c56ef672 1586 rate_masks[chan->band] = ratemask;
b9a9ada1 1587 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1588 skb_tailroom(skb), &dummy_ie_desc,
1589 ie, ie_len, BIT(chan->band),
1590 rate_masks, &chandef);
b9a9ada1 1591 skb_put(skb, ies_len);
7c12ce8b 1592
46900298 1593 if (dst) {
7c12ce8b 1594 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1595 memcpy(mgmt->da, dst, ETH_ALEN);
1596 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1597 }
46900298 1598
62ae67be 1599 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1600
a619a4c0
JO		 1601 return skb;
1602}
1603
a344d677
JB		 1604void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1605 const u8 *src, const u8 *dst,
a619a4c0 1606 const u8 *ssid, size_t ssid_len,
a806c558 1607 const u8 *ie, size_t ie_len,
1672c0e3 1608 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1609 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1610{
1611 struct sk_buff *skb;
1612
a344d677 1613 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
6b77863b 1614 ssid, ssid_len,
85a237fe 1615 ie, ie_len, directed);
aad14ceb 1616 if (skb) {
1672c0e3 1617 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1618 if (scan)
1619 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1620 else
1621 ieee80211_tx_skb(sdata, skb);
aad14ceb 1622 }
46900298
JB		 1623}
1624
2103dec1 1625u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1626 struct ieee802_11_elems *elems,
9ebb61a2 1627 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1628{
1629 struct ieee80211_supported_band *sband;
46900298 1630 size_t num_rates;
2103dec1
SW		 1631 u32 supp_rates, rate_flags;
1632 int i, j, shift;
1633 sband = sdata->local->hw.wiphy->bands[band];
1634
1635 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1636 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1637
4ee73f33
MK		 1638 if (WARN_ON(!sband))
1639 return 1;
46900298 1640
46900298
JB		 1641 num_rates = sband->n_bitrates;
1642 supp_rates = 0;
1643 for (i = 0; i < elems->supp_rates_len +
1644 elems->ext_supp_rates_len; i++) {
1645 u8 rate = 0;
1646 int own_rate;
9ebb61a2 1647 bool is_basic;
46900298
JB		 1648 if (i < elems->supp_rates_len)
1649 rate = elems->supp_rates[i];
1650 else if (elems->ext_supp_rates)
1651 rate = elems->ext_supp_rates
1652 [i - elems->supp_rates_len];
1653 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1654 is_basic = !!(rate & 0x80);
1655
1656 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1657 continue;
1658
1659 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1660 int brate;
1661 if ((rate_flags & sband->bitrates[j].flags)
1662 != rate_flags)
1663 continue;
1664
1665 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1666 1 << shift);
1667
1668 if (brate == own_rate) {
46900298 1669 supp_rates |= BIT(j);
9ebb61a2
AN		 1670 if (basic_rates && is_basic)
1671 *basic_rates |= BIT(j);
1672 }
1673 }
46900298
JB		 1674 }
1675 return supp_rates;
1676}
f2753ddb 1677
84f6a01c
JB		 1678void ieee80211_stop_device(struct ieee80211_local *local)
1679{
1680 ieee80211_led_radio(local, false);
67408c8c 1681 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1682
1683 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1684
1685 flush_workqueue(local->workqueue);
678f415f 1686 drv_stop(local);
84f6a01c
JB		 1687}
1688
f6837ba8
JB		 1689static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1690{
1691 struct ieee80211_sub_if_data *sdata;
1692 struct ieee80211_chanctx *ctx;
1693
1694 /*
1695 * We get here if during resume the device can't be restarted properly.
1696 * We might also get here if this happens during HW reset, which is a
1697 * slightly different situation and we need to drop all connections in
1698 * the latter case.
1699 *
1700 * Ask cfg80211 to turn off all interfaces, this will result in more
1701 * warnings but at least we'll then get into a clean stopped state.
1702 */
1703
1704 local->resuming = false;
1705 local->suspended = false;
1706 local->started = false;
1707
1708 /* scheduled scan clearly can't be running any more, but tell
1709 * cfg80211 and clear local state
1710 */
1711 ieee80211_sched_scan_end(local);
1712
1713 list_for_each_entry(sdata, &local->interfaces, list)
1714 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1715
1716 /* Mark channel contexts as not being in the driver any more to avoid
1717 * removing them from the driver during the shutdown process...
1718 */
1719 mutex_lock(&local->chanctx_mtx);
1720 list_for_each_entry(ctx, &local->chanctx_list, list)
1721 ctx->driver_present = false;
1722 mutex_unlock(&local->chanctx_mtx);
1723
1724 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1725}
1726
153a5fc4
SG		 1727static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1728 struct ieee80211_sub_if_data *sdata)
1729{
1730 struct ieee80211_chanctx_conf *conf;
1731 struct ieee80211_chanctx *ctx;
1732
1733 if (!local->use_chanctx)
1734 return;
1735
1736 mutex_lock(&local->chanctx_mtx);
1737 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1738 lockdep_is_held(&local->chanctx_mtx));
1739 if (conf) {
1740 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1741 drv_assign_vif_chanctx(local, sdata, ctx);
1742 }
1743 mutex_unlock(&local->chanctx_mtx);
1744}
1745
f2753ddb
JB		 1746int ieee80211_reconfig(struct ieee80211_local *local)
1747{
1748 struct ieee80211_hw *hw = &local->hw;
1749 struct ieee80211_sub_if_data *sdata;
55de908a 1750 struct ieee80211_chanctx *ctx;
f2753ddb 1751 struct sta_info *sta;
2683d65b 1752 int res, i;
d888130a 1753 bool reconfig_due_to_wowlan = false;
d43c6b6e 1754 struct ieee80211_sub_if_data *sched_scan_sdata;
6ea0a69c 1755 struct cfg80211_sched_scan_request *sched_scan_req;
d43c6b6e 1756 bool sched_scan_stopped = false;
d888130a 1757
0f8b8245
EP		 1758 /* nothing to do if HW shouldn't run */
1759 if (!local->open_count)
1760 goto wake_up;
1761
8f21b0ad 1762#ifdef CONFIG_PM
ceb99fe0
JB		 1763 if (local->suspended)
1764 local->resuming = true;
f2753ddb 1765
eecc4800 1766 if (local->wowlan) {
eecc4800 1767 res = drv_resume(local);
27b3eb9c 1768 local->wowlan = false;
eecc4800
JB		 1769 if (res < 0) {
1770 local->resuming = false;
1771 return res;
1772 }
1773 if (res == 0)
1774 goto wake_up;
1775 WARN_ON(res > 1);
1776 /*
1777 * res is 1, which means the driver requested
1778 * to go through a regular reset on wakeup.
1779 */
d888130a 1780 reconfig_due_to_wowlan = true;
eecc4800
JB		 1781 }
1782#endif
f2753ddb 1783
94f9b97b
JB		 1784 /*
1785 * Upon resume hardware can sometimes be goofy due to
1786 * various platform / driver / bus issues, so restarting
1787 * the device may at times not work immediately. Propagate
1788 * the error.
1789 */
1790 res = drv_start(local);
1791 if (res) {
f6837ba8
JB		 1792 if (local->suspended)
1793 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1794 else
1795 WARN(1, "Hardware became unavailable during restart.\n");
1796 ieee80211_handle_reconfig_failure(local);
94f9b97b 1797 return res;
f2753ddb
JB		 1798 }
1799
7f281975
YAP		 1800 /* setup fragmentation threshold */
1801 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1802
1803 /* setup RTS threshold */
1804 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1805
1806 /* reset coverage class */
1807 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1808
94f9b97b
JB		 1809 ieee80211_led_radio(local, true);
1810 ieee80211_mod_tpt_led_trig(local,
1811 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1812
f2753ddb 1813 /* add interfaces */
4b6f1dd6
JB		 1814 sdata = rtnl_dereference(local->monitor_sdata);
1815 if (sdata) {
3c3e21e7
JB		 1816 /* in HW restart it exists already */
1817 WARN_ON(local->resuming);
4b6f1dd6
JB		 1818 res = drv_add_interface(local, sdata);
1819 if (WARN_ON(res)) {
0c2bef46 1820 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1821 synchronize_net();
1822 kfree(sdata);
1823 }
1824 }
1825
f2753ddb
JB		 1826 list_for_each_entry(sdata, &local->interfaces, list) {
1827 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1828 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
c8fff3dc 1829 ieee80211_sdata_running(sdata)) {
7b7eab6f 1830 res = drv_add_interface(local, sdata);
c8fff3dc
LC		 1831 if (WARN_ON(res))
1832 break;
1833 }
1834 }
1835
1836 /* If adding any of the interfaces failed above, roll back and
1837 * report failure.
1838 */
1839 if (res) {
1840 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1841 list)
1842 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1843 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1844 ieee80211_sdata_running(sdata))
1845 drv_remove_interface(local, sdata);
1846 ieee80211_handle_reconfig_failure(local);
1847 return res;
f2753ddb
JB		 1848 }
1849
55de908a 1850 /* add channel contexts */
f0dea9c7
AS		 1851 if (local->use_chanctx) {
1852 mutex_lock(&local->chanctx_mtx);
1853 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1854 if (ctx->replace_state !=
1855 IEEE80211_CHANCTX_REPLACES_OTHER)
1856 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1857 mutex_unlock(&local->chanctx_mtx);
55de908a 1858
7df180f7
ZG		 1859 list_for_each_entry(sdata, &local->interfaces, list) {
1860 if (!ieee80211_sdata_running(sdata))
1861 continue;
1862 ieee80211_assign_chanctx(local, sdata);
1863 }
6352c87f 1864
7df180f7
ZG		 1865 sdata = rtnl_dereference(local->monitor_sdata);
1866 if (sdata && ieee80211_sdata_running(sdata))
1867 ieee80211_assign_chanctx(local, sdata);
1868 }
fe5f2559 1869
f2753ddb 1870 /* add STAs back */
34e89507
JB		 1871 mutex_lock(&local->sta_mtx);
1872 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1873 enum ieee80211_sta_state state;
f09603a2 1874
2e8d397e
AN		 1875 if (!sta->uploaded)
1876 continue;
1877
1878 /* AP-mode stations will be added later */
1879 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1880 continue;
1881
1882 for (state = IEEE80211_STA_NOTEXIST;
1883 state < sta->sta_state; state++)
1884 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1885 state + 1));
f2753ddb 1886 }
34e89507 1887 mutex_unlock(&local->sta_mtx);
f2753ddb 1888
2683d65b 1889 /* reconfigure tx conf */
54bcbc69
JB		 1890 if (hw->queues >= IEEE80211_NUM_ACS) {
1891 list_for_each_entry(sdata, &local->interfaces, list) {
1892 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1893 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1894 !ieee80211_sdata_running(sdata))
1895 continue;
f6f3def3 1896
54bcbc69
JB		 1897 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1898 drv_conf_tx(local, sdata, i,
1899 &sdata->tx_conf[i]);
1900 }
f6f3def3 1901 }
2683d65b 1902
f2753ddb
JB		 1903 /* reconfigure hardware */
1904 ieee80211_hw_config(local, ~0);
1905
f2753ddb 1906 ieee80211_configure_filter(local);
f2753ddb
JB		 1907
1908 /* Finally also reconfigure all the BSS information */
1909 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1910 u32 changed;
1911
9607e6b6 1912 if (!ieee80211_sdata_running(sdata))
f2753ddb 1913 continue;
ac8dd506
JB		 1914
1915 /* common change flags for all interface types */
1916 changed = BSS_CHANGED_ERP_CTS_PROT |
1917 BSS_CHANGED_ERP_PREAMBLE |
1918 BSS_CHANGED_ERP_SLOT |
1919 BSS_CHANGED_HT |
1920 BSS_CHANGED_BASIC_RATES |
1921 BSS_CHANGED_BEACON_INT |
1922 BSS_CHANGED_BSSID |
4ced3f74 1923 BSS_CHANGED_CQM |
55de47f6 1924 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1925 BSS_CHANGED_IDLE |
1926 BSS_CHANGED_TXPOWER;
ac8dd506 1927
f2753ddb
JB		 1928 switch (sdata->vif.type) {
1929 case NL80211_IFTYPE_STATION:
0d392e93 1930 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1931 BSS_CHANGED_ARP_FILTER |
1932 BSS_CHANGED_PS;
c65dd147 1933
989c6505
AB		 1934 /* Re-send beacon info report to the driver */
1935 if (sdata->u.mgd.have_beacon)
1936 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1937
8d61ffa5 1938 sdata_lock(sdata);
ac8dd506 1939 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1940 sdata_unlock(sdata);
ac8dd506 1941 break;
6e0bd6c3 1942 case NL80211_IFTYPE_OCB:
239281f8
RL		 1943 changed |= BSS_CHANGED_OCB;
1944 ieee80211_bss_info_change_notify(sdata, changed);
6e0bd6c3 1945 break;
f2753ddb 1946 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1947 changed |= BSS_CHANGED_IBSS;
1948 /* fall through */
f2753ddb 1949 case NL80211_IFTYPE_AP:
339afbf4 1950 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1951
1041638f 1952 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1953 changed |= BSS_CHANGED_AP_PROBE_RESP;
1954
1041638f
JB		 1955 if (rcu_access_pointer(sdata->u.ap.beacon))
1956 drv_start_ap(local, sdata);
1957 }
1958
7827493b 1959 /* fall through */
f2753ddb 1960 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1961 if (sdata->vif.bss_conf.enable_beacon) {
1962 changed |= BSS_CHANGED_BEACON |
1963 BSS_CHANGED_BEACON_ENABLED;
1964 ieee80211_bss_info_change_notify(sdata, changed);
1965 }
f2753ddb
JB		 1966 break;
1967 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1968 case NL80211_IFTYPE_AP_VLAN:
1969 case NL80211_IFTYPE_MONITOR:
98104fde 1970 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1971 /* nothing to do */
f142c6b9 1972 break;
f2753ddb 1973 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1974 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1975 case NL80211_IFTYPE_P2P_CLIENT:
1976 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1977 WARN_ON(1);
1978 break;
1979 }
1980 }
1981
8e1b23b9
ES		 1982 ieee80211_recalc_ps(local, -1);
1983
6e1b1b24
EP		 1984 /*
1985 * The sta might be in psm against the ap (e.g. because
1986 * this was the state before a hw restart), so we
1987 * explicitly send a null packet in order to make sure
1988 * it'll sync against the ap (and get out of psm).
1989 */
1990 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1991 list_for_each_entry(sdata, &local->interfaces, list) {
1992 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1993 continue;
20f544ee
JB		 1994 if (!sdata->u.mgd.associated)
1995 continue;
6e1b1b24
EP		 1996
1997 ieee80211_send_nullfunc(local, sdata, 0);
1998 }
1999 }
2000
2e8d397e
AN		 2001 /* APs are now beaconing, add back stations */
2002 mutex_lock(&local->sta_mtx);
2003 list_for_each_entry(sta, &local->sta_list, list) {
2004 enum ieee80211_sta_state state;
2005
2006 if (!sta->uploaded)
2007 continue;
2008
2009 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2010 continue;
2011
2012 for (state = IEEE80211_STA_NOTEXIST;
2013 state < sta->sta_state; state++)
2014 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2015 state + 1));
2016 }
2017 mutex_unlock(&local->sta_mtx);
2018
7b21aea0
ES		 2019 /* add back keys */
2020 list_for_each_entry(sdata, &local->interfaces, list)
2021 if (ieee80211_sdata_running(sdata))
2022 ieee80211_enable_keys(sdata);
2023
c6209488 2024 wake_up:
04800ada
AN		 2025 local->in_reconfig = false;
2026 barrier();
2027
3c3e21e7
JB		 2028 if (local->monitors == local->open_count && local->monitors > 0)
2029 ieee80211_add_virtual_monitor(local);
2030
2a419056
JB		 2031 /*
2032 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2033 * sessions can be established after a resume.
2034 *
2035 * Also tear down aggregation sessions since reconfiguring
2036 * them in a hardware restart scenario is not easily done
2037 * right now, and the hardware will have lost information
2038 * about the sessions, but we and the AP still think they
2039 * are active. This is really a workaround though.
2040 */
74e2bd1f 2041 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 2042 mutex_lock(&local->sta_mtx);
2043
2044 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 2045 ieee80211_sta_tear_down_BA_sessions(
2046 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 2047 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 2048 }
2a419056
JB		 2049
2050 mutex_unlock(&local->sta_mtx);
74e2bd1f 2051 }
74e2bd1f 2052
445ea4e8 2053 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 2054 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2055 false);
f2753ddb 2056
32769814
AN		 2057 /*
2058 * Reconfigure sched scan if it was interrupted by FW restart or
2059 * suspend.
2060 */
2061 mutex_lock(&local->mtx);
2062 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2063 lockdep_is_held(&local->mtx));
6ea0a69c
JB		 2064 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2065 lockdep_is_held(&local->mtx));
2066 if (sched_scan_sdata && sched_scan_req)
32769814
AN		 2067 /*
2068 * Sched scan stopped, but we don't want to report it. Instead,
2069 * we're trying to reschedule.
2070 */
2071 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
6ea0a69c 2072 sched_scan_req))
32769814
AN		 2073 sched_scan_stopped = true;
2074 mutex_unlock(&local->mtx);
2075
2076 if (sched_scan_stopped)
e669ba2d 2077 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 2078
5bb644a0
JB		 2079 /*
2080 * If this is for hw restart things are still running.
2081 * We may want to change that later, however.
2082 */
0f8b8245 2083 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
cf2c92d8 2084 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
8f21b0ad
JB		 2085
2086 if (!local->suspended)
5bb644a0
JB		 2087 return 0;
2088
2089#ifdef CONFIG_PM
ceb99fe0 2090 /* first set suspended false, then resuming */
5bb644a0 2091 local->suspended = false;
ceb99fe0
JB		 2092 mb();
2093 local->resuming = false;
5bb644a0 2094
9120d94e
LC		 2095 /* It's possible that we don't handle the scan completion in
2096 * time during suspend, so if it's still marked as completed
2097 * here, queue the work and flush it to clean things up.
2098 * Instead of calling the worker function directly here, we
2099 * really queue it to avoid potential races with other flows
2100 * scheduling the same work.
2101 */
2102 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2103 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2104 flush_delayed_work(&local->scan_work);
2105 }
2106
0f8b8245 2107 if (local->open_count && !reconfig_due_to_wowlan)
cf2c92d8
EP		 2108 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2109
b8360ab8
JB		 2110 list_for_each_entry(sdata, &local->interfaces, list) {
2111 if (!ieee80211_sdata_running(sdata))
2112 continue;
2113 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2114 ieee80211_sta_restart(sdata);
2115 }
2116
26d59535 2117 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 2118#else
2119 WARN_ON(1);
2120#endif
d43c6b6e 2121
f2753ddb
JB		 2122 return 0;
2123}
42935eca 2124
95acac61
JB		 2125void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2126{
2127 struct ieee80211_sub_if_data *sdata;
2128 struct ieee80211_local *local;
2129 struct ieee80211_key *key;
2130
2131 if (WARN_ON(!vif))
2132 return;
2133
2134 sdata = vif_to_sdata(vif);
2135 local = sdata->local;
2136
2137 if (WARN_ON(!local->resuming))
2138 return;
2139
2140 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2141 return;
2142
2143 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2144
2145 mutex_lock(&local->key_mtx);
2146 list_for_each_entry(key, &sdata->key_list, list)
2147 key->flags |= KEY_FLAG_TAINTED;
2148 mutex_unlock(&local->key_mtx);
2149}
2150EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2151
04ecd257 2152void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2153{
04ecd257
JB		 2154 struct ieee80211_local *local = sdata->local;
2155 struct ieee80211_chanctx_conf *chanctx_conf;
2156 struct ieee80211_chanctx *chanctx;
025e6be2 2157
04ecd257 2158 mutex_lock(&local->chanctx_mtx);
0f78231b 2159
04ecd257
JB		 2160 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2161 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2162
04ecd257 2163 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2164 goto unlock;
0f78231b 2165
04ecd257
JB		 2166 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2167 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2168 unlock:
04ecd257 2169 mutex_unlock(&local->chanctx_mtx);
0f78231b 2170}
8e664fb3 2171
21f659bf
EP		 2172void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2173{
2174 struct ieee80211_local *local = sdata->local;
2175 struct ieee80211_chanctx_conf *chanctx_conf;
2176 struct ieee80211_chanctx *chanctx;
2177
2178 mutex_lock(&local->chanctx_mtx);
2179
2180 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2181 lockdep_is_held(&local->chanctx_mtx));
2182
2183 if (WARN_ON_ONCE(!chanctx_conf))
2184 goto unlock;
2185
2186 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2187 ieee80211_recalc_chanctx_min_def(local, chanctx);
2188 unlock:
2189 mutex_unlock(&local->chanctx_mtx);
2190}
2191
8e664fb3
JB		 2192static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2193{
2194 int i;
2195
2196 for (i = 0; i < n_ids; i++)
2197 if (ids[i] == id)
2198 return true;
2199 return false;
2200}
2201
8ed28747
JB		 2202size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2203 const u8 *ids, int n_ids,
2204 const u8 *after_ric, int n_after_ric,
2205 size_t offset)
8e664fb3
JB		 2206{
2207 size_t pos = offset;
2208
8ed28747
JB		 2209 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2210 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2211 pos += 2 + ies[pos + 1];
2212
2213 while (pos < ielen &&
2214 !ieee80211_id_in_list(after_ric, n_after_ric,
2215 ies[pos]))
2216 pos += 2 + ies[pos + 1];
2217 } else {
2218 pos += 2 + ies[pos + 1];
2219 }
2220 }
8e664fb3
JB		 2221
2222 return pos;
2223}
8ed28747
JB		 2224
2225size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2226 const u8 *ids, int n_ids, size_t offset)
2227{
2228 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2229}
a7f3a768 2230EXPORT_SYMBOL(ieee80211_ie_split);
8e664fb3
JB		 2231
2232size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2233{
2234 size_t pos = offset;
2235
2236 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2237 pos += 2 + ies[pos + 1];
2238
2239 return pos;
2240}
615f7b9b
MV		 2241
2242static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2243 int rssi_min_thold,
2244 int rssi_max_thold)
2245{
2246 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2247
2248 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2249 return;
2250
2251 /*
2252 * Scale up threshold values before storing it, as the RSSI averaging
2253 * algorithm uses a scaled up value as well. Change this scaling
2254 * factor if the RSSI averaging algorithm changes.
2255 */
2256 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2257 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2258}
2259
2260void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2261 int rssi_min_thold,
2262 int rssi_max_thold)
2263{
2264 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2265
2266 WARN_ON(rssi_min_thold == rssi_max_thold ||
2267 rssi_min_thold > rssi_max_thold);
2268
2269 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2270 rssi_max_thold);
2271}
2272EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2273
2274void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2275{
2276 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2277
2278 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2279}
2280EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2281
ef96a842 2282u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2283 u16 cap)
2284{
2285 __le16 tmp;
2286
2287 *pos++ = WLAN_EID_HT_CAPABILITY;
2288 *pos++ = sizeof(struct ieee80211_ht_cap);
2289 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2290
2291 /* capability flags */
2292 tmp = cpu_to_le16(cap);
2293 memcpy(pos, &tmp, sizeof(u16));
2294 pos += sizeof(u16);
2295
2296 /* AMPDU parameters */
ef96a842
BG		 2297 *pos++ = ht_cap->ampdu_factor |
2298 (ht_cap->ampdu_density <<
42e7aa77
AS		 2299 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2300
2301 /* MCS set */
ef96a842
BG		 2302 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2303 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2304
2305 /* extended capabilities */
2306 pos += sizeof(__le16);
2307
2308 /* BF capabilities */
2309 pos += sizeof(__le32);
2310
2311 /* antenna selection */
2312 pos += sizeof(u8);
2313
2314 return pos;
2315}
2316
ba0afa2f 2317u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2318 u32 cap)
ba0afa2f
MP		 2319{
2320 __le32 tmp;
2321
2322 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2323 *pos++ = sizeof(struct ieee80211_vht_cap);
2324 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2325
2326 /* capability flags */
2327 tmp = cpu_to_le32(cap);
2328 memcpy(pos, &tmp, sizeof(u32));
2329 pos += sizeof(u32);
2330
2331 /* VHT MCS set */
2332 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2333 pos += sizeof(vht_cap->vht_mcs);
2334
2335 return pos;
2336}
2337
074d46d1 2338u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2339 const struct cfg80211_chan_def *chandef,
431e3154 2340 u16 prot_mode)
42e7aa77 2341{
074d46d1 2342 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2343 /* Build HT Information */
074d46d1
JB		 2344 *pos++ = WLAN_EID_HT_OPERATION;
2345 *pos++ = sizeof(struct ieee80211_ht_operation);
2346 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2347 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2348 chandef->chan->center_freq);
2349 switch (chandef->width) {
2350 case NL80211_CHAN_WIDTH_160:
2351 case NL80211_CHAN_WIDTH_80P80:
2352 case NL80211_CHAN_WIDTH_80:
2353 case NL80211_CHAN_WIDTH_40:
2354 if (chandef->center_freq1 > chandef->chan->center_freq)
2355 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2356 else
2357 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2358 break;
42e7aa77 2359 default:
074d46d1 2360 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2361 break;
2362 }
aee286c2 2363 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2364 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2365 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2366 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2367
431e3154 2368 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2369 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2370
2371 /* It seems that Basic MCS set and Supported MCS set
2372 are identical for the first 10 bytes */
074d46d1
JB		 2373 memset(&ht_oper->basic_set, 0, 16);
2374 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2375
074d46d1 2376 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2377}
2378
fb28ec0c
AN		 2379u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2380 const struct cfg80211_chan_def *chandef)
2381{
2382 struct ieee80211_vht_operation *vht_oper;
2383
2384 *pos++ = WLAN_EID_VHT_OPERATION;
2385 *pos++ = sizeof(struct ieee80211_vht_operation);
2386 vht_oper = (struct ieee80211_vht_operation *)pos;
2387 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2388 chandef->center_freq1);
2389 if (chandef->center_freq2)
2390 vht_oper->center_freq_seg2_idx =
2391 ieee80211_frequency_to_channel(chandef->center_freq2);
2392
2393 switch (chandef->width) {
2394 case NL80211_CHAN_WIDTH_160:
2395 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2396 break;
2397 case NL80211_CHAN_WIDTH_80P80:
2398 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2399 break;
2400 case NL80211_CHAN_WIDTH_80:
2401 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2402 break;
2403 default:
2404 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2405 break;
2406 }
2407
2408 /* don't require special VHT peer rates */
2409 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2410
2411 return pos + sizeof(struct ieee80211_vht_operation);
2412}
2413
4bf88530 2414void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2415 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2416 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2417{
2418 enum nl80211_channel_type channel_type;
2419
4bf88530
JB		 2420 if (!ht_oper) {
2421 cfg80211_chandef_create(chandef, control_chan,
2422 NL80211_CHAN_NO_HT);
2423 return;
2424 }
42e7aa77 2425
074d46d1 2426 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2427 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2428 channel_type = NL80211_CHAN_HT20;
2429 break;
2430 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2431 channel_type = NL80211_CHAN_HT40PLUS;
2432 break;
2433 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2434 channel_type = NL80211_CHAN_HT40MINUS;
2435 break;
2436 default:
2437 channel_type = NL80211_CHAN_NO_HT;
2438 }
2439
4bf88530 2440 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2441}
2442
abcff6ef
JD		 2443void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2444 const struct ieee80211_vht_operation *oper,
2445 struct cfg80211_chan_def *chandef)
2446{
2447 if (!oper)
2448 return;
2449
2450 chandef->chan = control_chan;
2451
2452 switch (oper->chan_width) {
2453 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2454 break;
2455 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2456 chandef->width = NL80211_CHAN_WIDTH_80;
2457 break;
2458 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2459 chandef->width = NL80211_CHAN_WIDTH_160;
2460 break;
2461 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2462 chandef->width = NL80211_CHAN_WIDTH_80P80;
2463 break;
2464 default:
2465 break;
2466 }
2467
2468 chandef->center_freq1 =
2469 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2470 control_chan->band);
2471 chandef->center_freq2 =
2472 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2473 control_chan->band);
2474}
2475
2103dec1
SW		 2476int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2477 const struct ieee80211_supported_band *sband,
2478 const u8 *srates, int srates_len, u32 *rates)
2479{
2480 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2481 int shift = ieee80211_chandef_get_shift(chandef);
2482 struct ieee80211_rate *br;
2483 int brate, rate, i, j, count = 0;
2484
2485 *rates = 0;
2486
2487 for (i = 0; i < srates_len; i++) {
2488 rate = srates[i] & 0x7f;
2489
2490 for (j = 0; j < sband->n_bitrates; j++) {
2491 br = &sband->bitrates[j];
2492 if ((rate_flags & br->flags) != rate_flags)
2493 continue;
2494
2495 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2496 if (brate == rate) {
2497 *rates |= BIT(j);
2498 count++;
2499 break;
2500 }
2501 }
2502 }
2503 return count;
2504}
2505
fc8a7321 2506int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2507 struct sk_buff *skb, bool need_basic,
2508 enum ieee80211_band band)
768db343 2509{
768db343
AN		 2510 struct ieee80211_local *local = sdata->local;
2511 struct ieee80211_supported_band *sband;
2103dec1 2512 int rate, shift;
768db343 2513 u8 i, rates, *pos;
fc8a7321 2514 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2515 u32 rate_flags;
768db343 2516
2103dec1
SW		 2517 shift = ieee80211_vif_get_shift(&sdata->vif);
2518 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2519 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2520 rates = 0;
2521 for (i = 0; i < sband->n_bitrates; i++) {
2522 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2523 continue;
2524 rates++;
2525 }
768db343
AN		 2526 if (rates > 8)
2527 rates = 8;
2528
2529 if (skb_tailroom(skb) < rates + 2)
2530 return -ENOMEM;
2531
2532 pos = skb_put(skb, rates + 2);
2533 *pos++ = WLAN_EID_SUPP_RATES;
2534 *pos++ = rates;
2535 for (i = 0; i < rates; i++) {
657c3e0c 2536 u8 basic = 0;
2103dec1
SW		 2537 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2538 continue;
2539
657c3e0c
AN		 2540 if (need_basic && basic_rates & BIT(i))
2541 basic = 0x80;
768db343 2542 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2543 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2544 5 * (1 << shift));
2545 *pos++ = basic | (u8) rate;
768db343
AN		 2546 }
2547
2548 return 0;
2549}
2550
fc8a7321 2551int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2552 struct sk_buff *skb, bool need_basic,
2553 enum ieee80211_band band)
768db343 2554{
768db343
AN		 2555 struct ieee80211_local *local = sdata->local;
2556 struct ieee80211_supported_band *sband;
cc63ec76 2557 int rate, shift;
768db343 2558 u8 i, exrates, *pos;
fc8a7321 2559 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2560 u32 rate_flags;
2561
2562 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2563 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2564
6b77863b 2565 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2566 exrates = 0;
2567 for (i = 0; i < sband->n_bitrates; i++) {
2568 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2569 continue;
2570 exrates++;
2571 }
2572
768db343
AN		 2573 if (exrates > 8)
2574 exrates -= 8;
2575 else
2576 exrates = 0;
2577
2578 if (skb_tailroom(skb) < exrates + 2)
2579 return -ENOMEM;
2580
2581 if (exrates) {
2582 pos = skb_put(skb, exrates + 2);
2583 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2584 *pos++ = exrates;
2585 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2586 u8 basic = 0;
2103dec1
SW		 2587 if ((rate_flags & sband->bitrates[i].flags)
2588 != rate_flags)
2589 continue;
657c3e0c
AN		 2590 if (need_basic && basic_rates & BIT(i))
2591 basic = 0x80;
2103dec1
SW		 2592 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2593 5 * (1 << shift));
2594 *pos++ = basic | (u8) rate;
768db343
AN		 2595 }
2596 }
2597 return 0;
2598}
1dae27f8
WYG		 2599
2600int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2601{
2602 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2604
be6bcabc
WYG		 2605 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2606 /* non-managed type inferfaces */
2607 return 0;
2608 }
3a7bba64 2609 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2610}
0d8a0a17 2611EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2612
2613u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2614{
2615 if (!mcs)
2616 return 1;
2617
2618 /* TODO: consider rx_highest */
2619
2620 if (mcs->rx_mask[3])
2621 return 4;
2622 if (mcs->rx_mask[2])
2623 return 3;
2624 if (mcs->rx_mask[1])
2625 return 2;
2626 return 1;
2627}
f4bda337
TP		 2628
2629/**
2630 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2631 * @local: mac80211 hw info struct
2632 * @status: RX status
2633 * @mpdu_len: total MPDU length (including FCS)
2634 * @mpdu_offset: offset into MPDU to calculate timestamp at
2635 *
2636 * This function calculates the RX timestamp at the given MPDU offset, taking
2637 * into account what the RX timestamp was. An offset of 0 will just normalize
2638 * the timestamp to TSF at beginning of MPDU reception.
2639 */
2640u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2641 struct ieee80211_rx_status *status,
2642 unsigned int mpdu_len,
2643 unsigned int mpdu_offset)
2644{
2645 u64 ts = status->mactime;
2646 struct rate_info ri;
2647 u16 rate;
2648
2649 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2650 return 0;
2651
2652 memset(&ri, 0, sizeof(ri));
2653
2654 /* Fill cfg80211 rate info */
2655 if (status->flag & RX_FLAG_HT) {
2656 ri.mcs = status->rate_idx;
2657 ri.flags |= RATE_INFO_FLAGS_MCS;
2658 if (status->flag & RX_FLAG_40MHZ)
b51f3bee
JB		 2659 ri.bw = RATE_INFO_BW_40;
2660 else
2661 ri.bw = RATE_INFO_BW_20;
f4bda337
TP		 2662 if (status->flag & RX_FLAG_SHORT_GI)
2663 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2664 } else if (status->flag & RX_FLAG_VHT) {
2665 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2666 ri.mcs = status->rate_idx;
2667 ri.nss = status->vht_nss;
2668 if (status->flag & RX_FLAG_40MHZ)
b51f3bee
JB		 2669 ri.bw = RATE_INFO_BW_40;
2670 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2671 ri.bw = RATE_INFO_BW_80;
2672 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2673 ri.bw = RATE_INFO_BW_160;
2674 else
2675 ri.bw = RATE_INFO_BW_20;
5614618e
JB		 2676 if (status->flag & RX_FLAG_SHORT_GI)
2677 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2678 } else {
2679 struct ieee80211_supported_band *sband;
2103dec1
SW		 2680 int shift = 0;
2681 int bitrate;
2682
b51f3bee 2683 if (status->flag & RX_FLAG_10MHZ) {
2103dec1 2684 shift = 1;
b51f3bee
JB		 2685 ri.bw = RATE_INFO_BW_10;
2686 } else if (status->flag & RX_FLAG_5MHZ) {
2103dec1 2687 shift = 2;
b51f3bee
JB		 2688 ri.bw = RATE_INFO_BW_5;
2689 } else {
2690 ri.bw = RATE_INFO_BW_20;
2691 }
f4bda337
TP		 2692
2693 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2694 bitrate = sband->bitrates[status->rate_idx].bitrate;
2695 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2696 }
2697
2698 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2699 if (WARN_ONCE(!rate,
2700 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2701 status->flag, status->rate_idx, status->vht_nss))
2702 return 0;
f4bda337
TP		 2703
2704 /* rewind from end of MPDU */
2705 if (status->flag & RX_FLAG_MACTIME_END)
2706 ts -= mpdu_len * 8 * 10 / rate;
2707
2708 ts += mpdu_offset * 8 * 10 / rate;
2709
2710 return ts;
2711}
164eb02d
SW		 2712
2713void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2714{
2715 struct ieee80211_sub_if_data *sdata;
d2859df5 2716 struct cfg80211_chan_def chandef;
164eb02d 2717
34a3740d 2718 mutex_lock(&local->mtx);
164eb02d
SW		 2719 mutex_lock(&local->iflist_mtx);
2720 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2721 /* it might be waiting for the local->mtx, but then
2722 * by the time it gets it, sdata->wdev.cac_started
2723 * will no longer be true
2724 */
2725 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2726
2727 if (sdata->wdev.cac_started) {
d2859df5 2728 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2729 ieee80211_vif_release_channel(sdata);
2730 cfg80211_cac_event(sdata->dev,
d2859df5 2731 &chandef,
164eb02d
SW		 2732 NL80211_RADAR_CAC_ABORTED,
2733 GFP_KERNEL);
2734 }
2735 }
2736 mutex_unlock(&local->iflist_mtx);
34a3740d 2737 mutex_unlock(&local->mtx);
164eb02d
SW		 2738}
2739
2740void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2741{
2742 struct ieee80211_local *local =
2743 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2744 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2745 struct ieee80211_chanctx *ctx;
2746 int num_chanctx = 0;
2747
2748 mutex_lock(&local->chanctx_mtx);
2749 list_for_each_entry(ctx, &local->chanctx_list, list) {
2750 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2751 continue;
2752
2753 num_chanctx++;
2754 chandef = ctx->conf.def;
2755 }
2756 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2757
2758 ieee80211_dfs_cac_cancel(local);
2759
486cf4c0
MK		 2760 if (num_chanctx > 1)
2761 /* XXX: multi-channel is not supported yet */
164eb02d 2762 WARN_ON(1);
84a3d1c9 2763 else
164eb02d 2764 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2765}
2766
2767void ieee80211_radar_detected(struct ieee80211_hw *hw)
2768{
2769 struct ieee80211_local *local = hw_to_local(hw);
2770
2771 trace_api_radar_detected(local);
2772
2773 ieee80211_queue_work(hw, &local->radar_detected_work);
2774}
2775EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2776
2777u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2778{
2779 u32 ret;
2780 int tmp;
2781
2782 switch (c->width) {
2783 case NL80211_CHAN_WIDTH_20:
2784 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2785 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2786 break;
2787 case NL80211_CHAN_WIDTH_40:
2788 c->width = NL80211_CHAN_WIDTH_20;
2789 c->center_freq1 = c->chan->center_freq;
2790 ret = IEEE80211_STA_DISABLE_40MHZ |
2791 IEEE80211_STA_DISABLE_VHT;
2792 break;
2793 case NL80211_CHAN_WIDTH_80:
2794 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2795 /* n_P40 */
2796 tmp /= 2;
2797 /* freq_P40 */
2798 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2799 c->width = NL80211_CHAN_WIDTH_40;
2800 ret = IEEE80211_STA_DISABLE_VHT;
2801 break;
2802 case NL80211_CHAN_WIDTH_80P80:
2803 c->center_freq2 = 0;
2804 c->width = NL80211_CHAN_WIDTH_80;
2805 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2806 IEEE80211_STA_DISABLE_160MHZ;
2807 break;
2808 case NL80211_CHAN_WIDTH_160:
2809 /* n_P20 */
2810 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2811 /* n_P80 */
2812 tmp /= 4;
2813 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2814 c->width = NL80211_CHAN_WIDTH_80;
2815 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2816 IEEE80211_STA_DISABLE_160MHZ;
2817 break;
2818 default:
2819 case NL80211_CHAN_WIDTH_20_NOHT:
2820 WARN_ON_ONCE(1);
2821 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2822 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2823 break;
2824 case NL80211_CHAN_WIDTH_5:
2825 case NL80211_CHAN_WIDTH_10:
2826 WARN_ON_ONCE(1);
2827 /* keep c->width */
2828 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2829 break;
2830 }
2831
2832 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2833
2834 return ret;
2835}
687da132
EG		 2836
2837/*
2838 * Returns true if smps_mode_new is strictly more restrictive than
2839 * smps_mode_old.
2840 */
2841bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2842 enum ieee80211_smps_mode smps_mode_new)
2843{
2844 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2845 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2846 return false;
2847
2848 switch (smps_mode_old) {
2849 case IEEE80211_SMPS_STATIC:
2850 return false;
2851 case IEEE80211_SMPS_DYNAMIC:
2852 return smps_mode_new == IEEE80211_SMPS_STATIC;
2853 case IEEE80211_SMPS_OFF:
2854 return smps_mode_new != IEEE80211_SMPS_OFF;
2855 default:
2856 WARN_ON(1);
2857 }
2858
2859 return false;
2860}
c6da674a
CYY		 2861
2862int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2863 struct cfg80211_csa_settings *csa_settings)
2864{
2865 struct sk_buff *skb;
2866 struct ieee80211_mgmt *mgmt;
2867 struct ieee80211_local *local = sdata->local;
2868 int freq;
2869 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2870 sizeof(mgmt->u.action.u.chan_switch);
2871 u8 *pos;
2872
2873 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2874 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2875 return -EOPNOTSUPP;
2876
2877 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2878 5 + /* channel switch announcement element */
2879 3 + /* secondary channel offset element */
2880 8); /* mesh channel switch parameters element */
2881 if (!skb)
2882 return -ENOMEM;
2883
2884 skb_reserve(skb, local->tx_headroom);
2885 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2886 memset(mgmt, 0, hdr_len);
2887 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2888 IEEE80211_STYPE_ACTION);
2889
2890 eth_broadcast_addr(mgmt->da);
2891 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2892 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2893 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2894 } else {
2895 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2896 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2897 }
2898 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2899 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2900 pos = skb_put(skb, 5);
2901 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2902 *pos++ = 3; /* IE length */
2903 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2904 freq = csa_settings->chandef.chan->center_freq;
2905 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2906 *pos++ = csa_settings->count; /* count */
2907
2908 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2909 enum nl80211_channel_type ch_type;
2910
2911 skb_put(skb, 3);
2912 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2913 *pos++ = 1; /* IE length */
2914 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2915 if (ch_type == NL80211_CHAN_HT40PLUS)
2916 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2917 else
2918 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2919 }
2920
2921 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2922 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2923
2924 skb_put(skb, 8);
2925 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2926 *pos++ = 6; /* IE length */
2927 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2928 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2929 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2930 *pos++ |= csa_settings->block_tx ?
2931 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2932 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2933 pos += 2;
ca91dc97 2934 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2935 pos += 2;
c6da674a
CYY		 2936 }
2937
2938 ieee80211_tx_skb(sdata, skb);
2939 return 0;
2940}
2475b1cc
MS		 2941
2942bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2943{
2944 return !(cs == NULL || cs->cipher == 0 ||
2945 cs->hdr_len < cs->pn_len + cs->pn_off ||
2946 cs->hdr_len <= cs->key_idx_off ||
2947 cs->key_idx_shift > 7 ||
2948 cs->key_idx_mask == 0);
2949}
2950
2951bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2952{
2953 int i;
2954
2955 /* Ensure we have enough iftype bitmap space for all iftype values */
2956 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2957
2958 for (i = 0; i < n; i++)
2959 if (!ieee80211_cs_valid(&cs[i]))
2960 return false;
2961
2962 return true;
2963}
2964
2965const struct ieee80211_cipher_scheme *
2966ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2967 enum nl80211_iftype iftype)
2968{
2969 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2970 int n = local->hw.n_cipher_schemes;
2971 int i;
2972 const struct ieee80211_cipher_scheme *cs = NULL;
2973
2974 for (i = 0; i < n; i++) {
2975 if (l[i].cipher == cipher) {
2976 cs = &l[i];
2977 break;
2978 }
2979 }
2980
2981 if (!cs || !(cs->iftype & BIT(iftype)))
2982 return NULL;
2983
2984 return cs;
2985}
2986
2987int ieee80211_cs_headroom(struct ieee80211_local *local,
2988 struct cfg80211_crypto_settings *crypto,
2989 enum nl80211_iftype iftype)
2990{
2991 const struct ieee80211_cipher_scheme *cs;
2992 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2993 int i;
2994
2995 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2996 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2997 iftype);
2998
2999 if (cs && headroom < cs->hdr_len)
3000 headroom = cs->hdr_len;
3001 }
3002
3003 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3004 if (cs && headroom < cs->hdr_len)
3005 headroom = cs->hdr_len;
3006
3007 return headroom;
3008}
a7022e65
FF		 3009
3010static bool
3011ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3012{
3013 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3014 int skip;
3015
3016 if (end > 0)
3017 return false;
3018
3019 /* End time is in the past, check for repetitions */
3020 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3021 if (data->count[i] < 255) {
3022 if (data->count[i] <= skip) {
3023 data->count[i] = 0;
3024 return false;
3025 }
3026
3027 data->count[i] -= skip;
3028 }
3029
3030 data->desc[i].start += skip * data->desc[i].interval;
3031
3032 return true;
3033}
3034
3035static bool
3036ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3037 s32 *offset)
3038{
3039 bool ret = false;
3040 int i;
3041
3042 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3043 s32 cur;
3044
3045 if (!data->count[i])
3046 continue;
3047
3048 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3049 ret = true;
3050
3051 cur = data->desc[i].start - tsf;
3052 if (cur > *offset)
3053 continue;
3054
3055 cur = data->desc[i].start + data->desc[i].duration - tsf;
3056 if (cur > *offset)
3057 *offset = cur;
3058 }
3059
3060 return ret;
3061}
3062
3063static u32
3064ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3065{
3066 s32 offset = 0;
3067 int tries = 0;
3068 /*
3069 * arbitrary limit, used to avoid infinite loops when combined NoA
3070 * descriptors cover the full time period.
3071 */
3072 int max_tries = 5;
3073
3074 ieee80211_extend_absent_time(data, tsf, &offset);
3075 do {
3076 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3077 break;
3078
3079 tries++;
3080 } while (tries < max_tries);
3081
3082 return offset;
3083}
3084
3085void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3086{
3087 u32 next_offset = BIT(31) - 1;
3088 int i;
3089
3090 data->absent = 0;
3091 data->has_next_tsf = false;
3092 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3093 s32 start;
3094
3095 if (!data->count[i])
3096 continue;
3097
3098 ieee80211_extend_noa_desc(data, tsf, i);
3099 start = data->desc[i].start - tsf;
3100 if (start <= 0)
3101 data->absent |= BIT(i);
3102
3103 if (next_offset > start)
3104 next_offset = start;
3105
3106 data->has_next_tsf = true;
3107 }
3108
3109 if (data->absent)
3110 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3111
3112 data->next_tsf = tsf + next_offset;
3113}
3114EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3115
3116int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3117 struct ieee80211_noa_data *data, u32 tsf)
3118{
3119 int ret = 0;
3120 int i;
3121
3122 memset(data, 0, sizeof(*data));
3123
3124 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3125 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3126
3127 if (!desc->count || !desc->duration)
3128 continue;
3129
3130 data->count[i] = desc->count;
3131 data->desc[i].start = le32_to_cpu(desc->start_time);
3132 data->desc[i].duration = le32_to_cpu(desc->duration);
3133 data->desc[i].interval = le32_to_cpu(desc->interval);
3134
3135 if (data->count[i] > 1 &&
3136 data->desc[i].interval < data->desc[i].duration)
3137 continue;
3138
3139 ieee80211_extend_noa_desc(data, tsf, i);
3140 ret++;
3141 }
3142
3143 if (ret)
3144 ieee80211_update_p2p_noa(data, tsf);
3145
3146 return ret;
3147}
3148EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 3149
3150void ieee80211_recalc_dtim(struct ieee80211_local *local,
3151 struct ieee80211_sub_if_data *sdata)
3152{
3153 u64 tsf = drv_get_tsf(local, sdata);
3154 u64 dtim_count = 0;
3155 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3156 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3157 struct ps_data *ps;
3158 u8 bcns_from_dtim;
3159
3160 if (tsf == -1ULL || !beacon_int || !dtim_period)
3161 return;
3162
3163 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3164 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3165 if (!sdata->bss)
3166 return;
3167
3168 ps = &sdata->bss->ps;
3169 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3170 ps = &sdata->u.mesh.ps;
3171 } else {
3172 return;
3173 }
3174
3175 /*
3176 * actually finds last dtim_count, mac80211 will update in
3177 * __beacon_add_tim().
3178 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3179 */
3180 do_div(tsf, beacon_int);
3181 bcns_from_dtim = do_div(tsf, dtim_period);
3182 /* just had a DTIM */
3183 if (!bcns_from_dtim)
3184 dtim_count = 0;
3185 else
3186 dtim_count = dtim_period - bcns_from_dtim;
3187
3188 ps->dtim_count = dtim_count;
3189}
73de86a3 3190
71e6195e
MK		 3191static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3192 struct ieee80211_chanctx *ctx)
3193{
3194 struct ieee80211_sub_if_data *sdata;
3195 u8 radar_detect = 0;
3196
3197 lockdep_assert_held(&local->chanctx_mtx);
3198
3199 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3200 return 0;
3201
3202 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3203 if (sdata->reserved_radar_required)
3204 radar_detect |= BIT(sdata->reserved_chandef.width);
3205
3206 /*
3207 * An in-place reservation context should not have any assigned vifs
3208 * until it replaces the other context.
3209 */
3210 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3211 !list_empty(&ctx->assigned_vifs));
3212
3213 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3214 if (sdata->radar_required)
3215 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3216
3217 return radar_detect;
3218}
3219
73de86a3
LC		 3220int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3221 const struct cfg80211_chan_def *chandef,
3222 enum ieee80211_chanctx_mode chanmode,
3223 u8 radar_detect)
3224{
3225 struct ieee80211_local *local = sdata->local;
3226 struct ieee80211_sub_if_data *sdata_iter;
3227 enum nl80211_iftype iftype = sdata->wdev.iftype;
3228 int num[NUM_NL80211_IFTYPES];
3229 struct ieee80211_chanctx *ctx;
b6a55015 3230 int num_different_channels = 0;
73de86a3
LC		 3231 int total = 1;
3232
3233 lockdep_assert_held(&local->chanctx_mtx);
3234
3235 if (WARN_ON(hweight32(radar_detect) > 1))
3236 return -EINVAL;
3237
b6a55015
LC		 3238 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3239 !chandef->chan))
73de86a3
LC		 3240 return -EINVAL;
3241
b6a55015
LC		 3242 if (chandef)
3243 num_different_channels = 1;
3244
73de86a3
LC		 3245 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3246 return -EINVAL;
3247
3248 /* Always allow software iftypes */
3249 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3250 if (radar_detect)
3251 return -EINVAL;
3252 return 0;
3253 }
3254
3255 memset(num, 0, sizeof(num));
3256
3257 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3258 num[iftype] = 1;
3259
3260 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3261 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3262 continue;
71e6195e 3263 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3264 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3265 num_different_channels++;
3266 continue;
3267 }
b6a55015 3268 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3269 cfg80211_chandef_compatible(chandef,
3270 &ctx->conf.def))
3271 continue;
3272 num_different_channels++;
3273 }
3274
3275 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3276 struct wireless_dev *wdev_iter;
3277
3278 wdev_iter = &sdata_iter->wdev;
3279
3280 if (sdata_iter == sdata ||
0f611d28 3281 !ieee80211_sdata_running(sdata_iter) ||
73de86a3
LC		 3282 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3283 continue;
3284
3285 num[wdev_iter->iftype]++;
3286 total++;
3287 }
3288
3289 if (total == 1 && !radar_detect)
3290 return 0;
3291
3292 return cfg80211_check_combinations(local->hw.wiphy,
3293 num_different_channels,
3294 radar_detect, num);
3295}
6fa001bc
MK		 3296
3297static void
3298ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3299 void *data)
3300{
3301 u32 *max_num_different_channels = data;
3302
3303 *max_num_different_channels = max(*max_num_different_channels,
3304 c->num_different_channels);
3305}
3306
3307int ieee80211_max_num_channels(struct ieee80211_local *local)
3308{
3309 struct ieee80211_sub_if_data *sdata;
3310 int num[NUM_NL80211_IFTYPES] = {};
3311 struct ieee80211_chanctx *ctx;
3312 int num_different_channels = 0;
3313 u8 radar_detect = 0;
3314 u32 max_num_different_channels = 1;
3315 int err;
3316
3317 lockdep_assert_held(&local->chanctx_mtx);
3318
3319 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3320 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3321 continue;
3322
6fa001bc
MK		 3323 num_different_channels++;
3324
71e6195e 3325 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3326 }
3327
3328 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3329 num[sdata->wdev.iftype]++;
3330
3331 err = cfg80211_iter_combinations(local->hw.wiphy,
3332 num_different_channels, radar_detect,
3333 num, ieee80211_iter_max_chans,
3334 &max_num_different_channels);
3335 if (err < 0)
3336 return err;
3337
3338 return max_num_different_channels;
3339}
40b861a0
AN		 3340
3341u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3342{
3343 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3344 *buf++ = 7; /* len */
3345 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3346 *buf++ = 0x50;
3347 *buf++ = 0xf2;
3348 *buf++ = 2; /* WME */
3349 *buf++ = 0; /* WME info */
3350 *buf++ = 1; /* WME ver */
3351 *buf++ = qosinfo; /* U-APSD no in use */
3352
3353 return buf;
3354}
Linux kernel - Deliverables
This page took 0.714616 seconds and 5 git commands to generate.