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mac80211: increase U-APSD max service period length
[linux-2.6-block.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
579void ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata)
581{
582 unsigned int queues;
583
584 if (!local->ops->flush)
585 return;
586
587 queues = ieee80211_get_vif_queues(local, sdata);
588
59f48fe2 589 ieee80211_stop_queues_by_reason(&local->hw, queues,
cca07b00
LC		 590 IEEE80211_QUEUE_STOP_REASON_FLUSH,
591 false);
445ea4e8 592
77be2c54 593 drv_flush(local, sdata, queues, false);
445ea4e8 594
59f48fe2 595 ieee80211_wake_queues_by_reason(&local->hw, queues,
cca07b00
LC		 596 IEEE80211_QUEUE_STOP_REASON_FLUSH,
597 false);
39ecc01d
JB		 598}
599
26da23b6
LC		 600void ieee80211_stop_vif_queues(struct ieee80211_local *local,
601 struct ieee80211_sub_if_data *sdata,
602 enum queue_stop_reason reason)
603{
604 ieee80211_stop_queues_by_reason(&local->hw,
605 ieee80211_get_vif_queues(local, sdata),
606 reason, true);
607}
608
609void ieee80211_wake_vif_queues(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata,
611 enum queue_stop_reason reason)
612{
613 ieee80211_wake_queues_by_reason(&local->hw,
614 ieee80211_get_vif_queues(local, sdata),
615 reason, true);
616}
617
c7c71066
JB		 618static void __iterate_active_interfaces(struct ieee80211_local *local,
619 u32 iter_flags,
620 void (*iterator)(void *data, u8 *mac,
621 struct ieee80211_vif *vif),
622 void *data)
dabeb344 623{
dabeb344
JB		 624 struct ieee80211_sub_if_data *sdata;
625
c7c71066 626 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 627 switch (sdata->vif.type) {
05c914fe 628 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 629 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
630 continue;
631 break;
05c914fe 632 case NL80211_IFTYPE_AP_VLAN:
2f561feb 633 continue;
2ca27bcf 634 default:
2f561feb
ID		 635 break;
636 }
8b2c9824
JB		 637 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
638 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
639 continue;
9607e6b6 640 if (ieee80211_sdata_running(sdata))
47846c9b 641 iterator(data, sdata->vif.addr,
2f561feb
ID		 642 &sdata->vif);
643 }
644
c7c71066
JB		 645 sdata = rcu_dereference_check(local->monitor_sdata,
646 lockdep_is_held(&local->iflist_mtx) ||
647 lockdep_rtnl_is_held());
8b2c9824
JB		 648 if (sdata &&
649 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
650 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 651 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 652}
685fb72b 653
c7c71066
JB		 654void ieee80211_iterate_active_interfaces(
655 struct ieee80211_hw *hw, u32 iter_flags,
656 void (*iterator)(void *data, u8 *mac,
657 struct ieee80211_vif *vif),
658 void *data)
659{
660 struct ieee80211_local *local = hw_to_local(hw);
661
662 mutex_lock(&local->iflist_mtx);
663 __iterate_active_interfaces(local, iter_flags, iterator, data);
c771c9d8 664 mutex_unlock(&local->iflist_mtx);
2f561feb
ID		 665}
666EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
667
668void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 669 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 670 void (*iterator)(void *data, u8 *mac,
671 struct ieee80211_vif *vif),
672 void *data)
673{
674 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 675
e38bad47 676 rcu_read_lock();
c7c71066
JB		 677 __iterate_active_interfaces(local, iter_flags, iterator, data);
678 rcu_read_unlock();
679}
680EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 681
c7c71066
JB		 682void ieee80211_iterate_active_interfaces_rtnl(
683 struct ieee80211_hw *hw, u32 iter_flags,
684 void (*iterator)(void *data, u8 *mac,
685 struct ieee80211_vif *vif),
686 void *data)
687{
688 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 689
c7c71066 690 ASSERT_RTNL();
685fb72b 691
c7c71066 692 __iterate_active_interfaces(local, iter_flags, iterator, data);
dabeb344 693}
c7c71066 694EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 695
0fc1e049
AN		 696static void __iterate_stations(struct ieee80211_local *local,
697 void (*iterator)(void *data,
698 struct ieee80211_sta *sta),
699 void *data)
700{
701 struct sta_info *sta;
702
703 list_for_each_entry_rcu(sta, &local->sta_list, list) {
704 if (!sta->uploaded)
705 continue;
706
707 iterator(data, &sta->sta);
708 }
709}
710
711void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
712 void (*iterator)(void *data,
713 struct ieee80211_sta *sta),
714 void *data)
715{
716 struct ieee80211_local *local = hw_to_local(hw);
717
718 rcu_read_lock();
719 __iterate_stations(local, iterator, data);
720 rcu_read_unlock();
721}
722EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
723
ad7e718c
JB		 724struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
725{
726 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
727
728 if (!ieee80211_sdata_running(sdata) ||
729 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
730 return NULL;
731 return &sdata->vif;
732}
733EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
734
42935eca
LR		 735/*
736 * Nothing should have been stuffed into the workqueue during
737 * the suspend->resume cycle. If this WARN is seen then there
738 * is a bug with either the driver suspend or something in
739 * mac80211 stuffing into the workqueue which we haven't yet
740 * cleared during mac80211's suspend cycle.
741 */
742static bool ieee80211_can_queue_work(struct ieee80211_local *local)
743{
ceb99fe0
JB		 744 if (WARN(local->suspended && !local->resuming,
745 "queueing ieee80211 work while going to suspend\n"))
746 return false;
42935eca
LR		 747
748 return true;
749}
750
751void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
752{
753 struct ieee80211_local *local = hw_to_local(hw);
754
755 if (!ieee80211_can_queue_work(local))
756 return;
757
758 queue_work(local->workqueue, work);
759}
760EXPORT_SYMBOL(ieee80211_queue_work);
761
762void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
763 struct delayed_work *dwork,
764 unsigned long delay)
765{
766 struct ieee80211_local *local = hw_to_local(hw);
767
768 if (!ieee80211_can_queue_work(local))
769 return;
770
771 queue_delayed_work(local->workqueue, dwork, delay);
772}
773EXPORT_SYMBOL(ieee80211_queue_delayed_work);
774
35d865af 775u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 776 struct ieee802_11_elems *elems,
777 u64 filter, u32 crc)
778{
779 size_t left = len;
35d865af 780 const u8 *pos = start;
dd76986b 781 bool calc_crc = filter != 0;
fcff4f10 782 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 783 const u8 *ie;
dd76986b 784
fcff4f10 785 bitmap_zero(seen_elems, 256);
dd76986b
JB		 786 memset(elems, 0, sizeof(*elems));
787 elems->ie_start = start;
788 elems->total_len = len;
789
790 while (left >= 2) {
791 u8 id, elen;
fcff4f10 792 bool elem_parse_failed;
dd76986b
JB		 793
794 id = *pos++;
795 elen = *pos++;
796 left -= 2;
797
fcff4f10
PS		 798 if (elen > left) {
799 elems->parse_error = true;
dd76986b 800 break;
fcff4f10
PS		 801 }
802
9690fb16
JB		 803 switch (id) {
804 case WLAN_EID_SSID:
805 case WLAN_EID_SUPP_RATES:
806 case WLAN_EID_FH_PARAMS:
807 case WLAN_EID_DS_PARAMS:
808 case WLAN_EID_CF_PARAMS:
809 case WLAN_EID_TIM:
810 case WLAN_EID_IBSS_PARAMS:
811 case WLAN_EID_CHALLENGE:
812 case WLAN_EID_RSN:
813 case WLAN_EID_ERP_INFO:
814 case WLAN_EID_EXT_SUPP_RATES:
815 case WLAN_EID_HT_CAPABILITY:
816 case WLAN_EID_HT_OPERATION:
817 case WLAN_EID_VHT_CAPABILITY:
818 case WLAN_EID_VHT_OPERATION:
819 case WLAN_EID_MESH_ID:
820 case WLAN_EID_MESH_CONFIG:
821 case WLAN_EID_PEER_MGMT:
822 case WLAN_EID_PREQ:
823 case WLAN_EID_PREP:
824 case WLAN_EID_PERR:
825 case WLAN_EID_RANN:
826 case WLAN_EID_CHANNEL_SWITCH:
827 case WLAN_EID_EXT_CHANSWITCH_ANN:
828 case WLAN_EID_COUNTRY:
829 case WLAN_EID_PWR_CONSTRAINT:
830 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 831 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 832 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 833 case WLAN_EID_CHAN_SWITCH_PARAM:
b2e506bf
JB		 834 /*
835 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
836 * that if the content gets bigger it might be needed more than once
837 */
9690fb16
JB		 838 if (test_bit(id, seen_elems)) {
839 elems->parse_error = true;
840 left -= elen;
841 pos += elen;
842 continue;
843 }
844 break;
fcff4f10 845 }
dd76986b
JB		 846
847 if (calc_crc && id < 64 && (filter & (1ULL << id)))
848 crc = crc32_be(crc, pos - 2, elen + 2);
849
fcff4f10
PS		 850 elem_parse_failed = false;
851
dd76986b
JB		 852 switch (id) {
853 case WLAN_EID_SSID:
854 elems->ssid = pos;
855 elems->ssid_len = elen;
856 break;
857 case WLAN_EID_SUPP_RATES:
858 elems->supp_rates = pos;
859 elems->supp_rates_len = elen;
860 break;
dd76986b 861 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 862 if (elen >= 1)
863 elems->ds_params = pos;
864 else
865 elem_parse_failed = true;
dd76986b 866 break;
dd76986b
JB		 867 case WLAN_EID_TIM:
868 if (elen >= sizeof(struct ieee80211_tim_ie)) {
869 elems->tim = (void *)pos;
870 elems->tim_len = elen;
fcff4f10
PS		 871 } else
872 elem_parse_failed = true;
dd76986b 873 break;
dd76986b
JB		 874 case WLAN_EID_CHALLENGE:
875 elems->challenge = pos;
876 elems->challenge_len = elen;
877 break;
878 case WLAN_EID_VENDOR_SPECIFIC:
879 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
880 pos[2] == 0xf2) {
881 /* Microsoft OUI (00:50:F2) */
882
883 if (calc_crc)
884 crc = crc32_be(crc, pos - 2, elen + 2);
885
441a33ba 886 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 887 /* OUI Type 2 - WMM IE */
888 if (pos[4] == 0) {
889 elems->wmm_info = pos;
890 elems->wmm_info_len = elen;
891 } else if (pos[4] == 1) {
892 elems->wmm_param = pos;
893 elems->wmm_param_len = elen;
894 }
895 }
896 }
897 break;
898 case WLAN_EID_RSN:
899 elems->rsn = pos;
900 elems->rsn_len = elen;
901 break;
902 case WLAN_EID_ERP_INFO:
1946bed9
JB		 903 if (elen >= 1)
904 elems->erp_info = pos;
905 else
906 elem_parse_failed = true;
dd76986b
JB		 907 break;
908 case WLAN_EID_EXT_SUPP_RATES:
909 elems->ext_supp_rates = pos;
910 elems->ext_supp_rates_len = elen;
911 break;
912 case WLAN_EID_HT_CAPABILITY:
913 if (elen >= sizeof(struct ieee80211_ht_cap))
914 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 915 else
916 elem_parse_failed = true;
dd76986b 917 break;
074d46d1
JB		 918 case WLAN_EID_HT_OPERATION:
919 if (elen >= sizeof(struct ieee80211_ht_operation))
920 elems->ht_operation = (void *)pos;
fcff4f10
PS		 921 else
922 elem_parse_failed = true;
dd76986b 923 break;
818255ea
MP		 924 case WLAN_EID_VHT_CAPABILITY:
925 if (elen >= sizeof(struct ieee80211_vht_cap))
926 elems->vht_cap_elem = (void *)pos;
927 else
928 elem_parse_failed = true;
929 break;
930 case WLAN_EID_VHT_OPERATION:
931 if (elen >= sizeof(struct ieee80211_vht_operation))
932 elems->vht_operation = (void *)pos;
933 else
934 elem_parse_failed = true;
935 break;
bee7f586
JB		 936 case WLAN_EID_OPMODE_NOTIF:
937 if (elen > 0)
938 elems->opmode_notif = pos;
939 else
940 elem_parse_failed = true;
941 break;
dd76986b
JB		 942 case WLAN_EID_MESH_ID:
943 elems->mesh_id = pos;
944 elems->mesh_id_len = elen;
945 break;
946 case WLAN_EID_MESH_CONFIG:
947 if (elen >= sizeof(struct ieee80211_meshconf_ie))
948 elems->mesh_config = (void *)pos;
fcff4f10
PS		 949 else
950 elem_parse_failed = true;
dd76986b
JB		 951 break;
952 case WLAN_EID_PEER_MGMT:
953 elems->peering = pos;
954 elems->peering_len = elen;
955 break;
3f52b7e3
MP		 956 case WLAN_EID_MESH_AWAKE_WINDOW:
957 if (elen >= 2)
958 elems->awake_window = (void *)pos;
959 break;
dd76986b
JB		 960 case WLAN_EID_PREQ:
961 elems->preq = pos;
962 elems->preq_len = elen;
963 break;
964 case WLAN_EID_PREP:
965 elems->prep = pos;
966 elems->prep_len = elen;
967 break;
968 case WLAN_EID_PERR:
969 elems->perr = pos;
970 elems->perr_len = elen;
971 break;
972 case WLAN_EID_RANN:
973 if (elen >= sizeof(struct ieee80211_rann_ie))
974 elems->rann = (void *)pos;
fcff4f10
PS		 975 else
976 elem_parse_failed = true;
dd76986b
JB		 977 break;
978 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 979 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
980 elem_parse_failed = true;
981 break;
982 }
983 elems->ch_switch_ie = (void *)pos;
dd76986b 984 break;
b4f286a1
JB		 985 case WLAN_EID_EXT_CHANSWITCH_ANN:
986 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
987 elem_parse_failed = true;
988 break;
989 }
990 elems->ext_chansw_ie = (void *)pos;
991 break;
85220d71
JB		 992 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
993 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
994 elem_parse_failed = true;
995 break;
996 }
997 elems->sec_chan_offs = (void *)pos;
998 break;
8f2535b9
CYY		 999 case WLAN_EID_CHAN_SWITCH_PARAM:
1000 if (elen !=
1001 sizeof(*elems->mesh_chansw_params_ie)) {
1002 elem_parse_failed = true;
1003 break;
1004 }
1005 elems->mesh_chansw_params_ie = (void *)pos;
1006 break;
b2e506bf
JB		 1007 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1008 if (!action ||
1009 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1010 elem_parse_failed = true;
1011 break;
1012 }
1013 elems->wide_bw_chansw_ie = (void *)pos;
1014 break;
1015 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1016 if (action) {
1017 elem_parse_failed = true;
1018 break;
1019 }
1020 /*
1021 * This is a bit tricky, but as we only care about
1022 * the wide bandwidth channel switch element, so
1023 * just parse it out manually.
1024 */
1025 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1026 pos, elen);
1027 if (ie) {
1028 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1029 elems->wide_bw_chansw_ie =
1030 (void *)(ie + 2);
1031 else
1032 elem_parse_failed = true;
1033 }
1034 break;
dd76986b
JB		 1035 case WLAN_EID_COUNTRY:
1036 elems->country_elem = pos;
1037 elems->country_elem_len = elen;
1038 break;
1039 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1040 if (elen != 1) {
1041 elem_parse_failed = true;
1042 break;
1043 }
dd76986b 1044 elems->pwr_constr_elem = pos;
dd76986b 1045 break;
c8d65917
SG		 1046 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1047 /* Lots of different options exist, but we only care
1048 * about the Dynamic Transmit Power Control element.
1049 * First check for the Cisco OUI, then for the DTPC
1050 * tag (0x00).
1051 */
1052 if (elen < 4) {
1053 elem_parse_failed = true;
1054 break;
1055 }
1056
1057 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1058 pos[2] != 0x96 || pos[3] != 0x00)
1059 break;
1060
1061 if (elen != 6) {
1062 elem_parse_failed = true;
1063 break;
1064 }
1065
1066 if (calc_crc)
1067 crc = crc32_be(crc, pos - 2, elen + 2);
1068
1069 elems->cisco_dtpc_elem = pos;
1070 break;
dd76986b 1071 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1072 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1073 elems->timeout_int = (void *)pos;
1074 else
1075 elem_parse_failed = true;
dd76986b
JB		 1076 break;
1077 default:
1078 break;
1079 }
1080
fcff4f10
PS		 1081 if (elem_parse_failed)
1082 elems->parse_error = true;
1083 else
5df45690 1084 __set_bit(id, seen_elems);
fcff4f10 1085
dd76986b
JB		 1086 left -= elen;
1087 pos += elen;
1088 }
1089
fcff4f10
PS		 1090 if (left != 0)
1091 elems->parse_error = true;
1092
dd76986b
JB		 1093 return crc;
1094}
1095
3abead59
JB		 1096void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1097 bool bss_notify)
5825fe10
JB		 1098{
1099 struct ieee80211_local *local = sdata->local;
1100 struct ieee80211_tx_queue_params qparam;
55de908a 1101 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1102 int ac;
a8ce8544 1103 bool use_11b, enable_qos;
239281f8 1104 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
aa837e1d 1105 int aCWmin, aCWmax;
5825fe10
JB		 1106
1107 if (!local->ops->conf_tx)
1108 return;
1109
54bcbc69
JB		 1110 if (local->hw.queues < IEEE80211_NUM_ACS)
1111 return;
1112
5825fe10
JB		 1113 memset(&qparam, 0, sizeof(qparam));
1114
55de908a
JB		 1115 rcu_read_lock();
1116 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1117 use_11b = (chanctx_conf &&
4bf88530 1118 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1119 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1120 rcu_read_unlock();
5825fe10 1121
a8ce8544
SG		 1122 /*
1123 * By default disable QoS in STA mode for old access points, which do
1124 * not support 802.11e. New APs will provide proper queue parameters,
1125 * that we will configure later.
1126 */
1127 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1128
239281f8
RL		 1129 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1130
1f4ffde8
FZ		 1131 /* Set defaults according to 802.11-2007 Table 7-37 */
1132 aCWmax = 1023;
1133 if (use_11b)
1134 aCWmin = 31;
1135 else
1136 aCWmin = 15;
1137
1138 /* Confiure old 802.11b/g medium access rules. */
1139 qparam.cw_max = aCWmax;
1140 qparam.cw_min = aCWmin;
1141 qparam.txop = 0;
1142 qparam.aifs = 2;
aa837e1d 1143
1f4ffde8
FZ		 1144 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1145 /* Update if QoS is enabled. */
a8ce8544
SG		 1146 if (enable_qos) {
1147 switch (ac) {
1148 case IEEE80211_AC_BK:
1149 qparam.cw_max = aCWmax;
1150 qparam.cw_min = aCWmin;
1151 qparam.txop = 0;
239281f8
RL		 1152 if (is_ocb)
1153 qparam.aifs = 9;
1154 else
1155 qparam.aifs = 7;
a8ce8544
SG		 1156 break;
1157 /* never happens but let's not leave undefined */
1158 default:
1159 case IEEE80211_AC_BE:
1160 qparam.cw_max = aCWmax;
1161 qparam.cw_min = aCWmin;
1162 qparam.txop = 0;
239281f8
RL		 1163 if (is_ocb)
1164 qparam.aifs = 6;
1165 else
1166 qparam.aifs = 3;
a8ce8544
SG		 1167 break;
1168 case IEEE80211_AC_VI:
1169 qparam.cw_max = aCWmin;
1170 qparam.cw_min = (aCWmin + 1) / 2 - 1;
239281f8
RL		 1171 if (is_ocb)
1172 qparam.txop = 0;
1173 else if (use_11b)
a8ce8544
SG		 1174 qparam.txop = 6016/32;
1175 else
1176 qparam.txop = 3008/32;
239281f8
RL		 1177
1178 if (is_ocb)
1179 qparam.aifs = 3;
1180 else
1181 qparam.aifs = 2;
a8ce8544
SG		 1182 break;
1183 case IEEE80211_AC_VO:
1184 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1185 qparam.cw_min = (aCWmin + 1) / 4 - 1;
239281f8
RL		 1186 if (is_ocb)
1187 qparam.txop = 0;
1188 else if (use_11b)
a8ce8544
SG		 1189 qparam.txop = 3264/32;
1190 else
1191 qparam.txop = 1504/32;
1192 qparam.aifs = 2;
1193 break;
1194 }
aa837e1d 1195 }
5825fe10 1196
ab13315a
KV		 1197 qparam.uapsd = false;
1198
54bcbc69
JB		 1199 sdata->tx_conf[ac] = qparam;
1200 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1201 }
e1b3ec1a 1202
f142c6b9
JB		 1203 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1204 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1205 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1206 if (bss_notify)
1207 ieee80211_bss_info_change_notify(sdata,
1208 BSS_CHANGED_QOS);
d9734979 1209 }
5825fe10 1210}
e50db65c 1211
46900298 1212void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1213 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1214 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1215 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1216 u32 tx_flags)
46900298
JB		 1217{
1218 struct ieee80211_local *local = sdata->local;
1219 struct sk_buff *skb;
1220 struct ieee80211_mgmt *mgmt;
fffd0934 1221 int err;
46900298 1222
15e230ab 1223 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1224 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1225 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1226 if (!skb)
46900298 1227 return;
d15b8459 1228
744462a9 1229 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1230
1231 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1232 memset(mgmt, 0, 24 + 6);
1233 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1234 IEEE80211_STYPE_AUTH);
efa6a09d 1235 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1236 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1237 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1238 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1239 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1240 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1241 if (extra)
1242 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1243
fffd0934
JB		 1244 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1245 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1246 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1247 WARN_ON(err);
1248 }
1249
1672c0e3
JB		 1250 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1251 tx_flags;
62ae67be 1252 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1253}
1254
6ae16775
AQ		 1255void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1256 const u8 *bssid, u16 stype, u16 reason,
1257 bool send_frame, u8 *frame_buf)
1258{
1259 struct ieee80211_local *local = sdata->local;
1260 struct sk_buff *skb;
1261 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1262
1263 /* build frame */
1264 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1265 mgmt->duration = 0; /* initialize only */
1266 mgmt->seq_ctrl = 0; /* initialize only */
1267 memcpy(mgmt->da, bssid, ETH_ALEN);
1268 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1269 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1270 /* u.deauth.reason_code == u.disassoc.reason_code */
1271 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1272
1273 if (send_frame) {
1274 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1275 IEEE80211_DEAUTH_FRAME_LEN);
1276 if (!skb)
1277 return;
1278
1279 skb_reserve(skb, local->hw.extra_tx_headroom);
1280
1281 /* copy in frame */
1282 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1283 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1284
1285 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1286 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1287 IEEE80211_SKB_CB(skb)->flags |=
1288 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1289
1290 ieee80211_tx_skb(sdata, skb);
1291 }
1292}
1293
c56ef672
DS		 1294static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1295 u8 *buffer, size_t buffer_len,
1296 const u8 *ie, size_t ie_len,
1297 enum ieee80211_band band,
1298 u32 rate_mask,
1299 struct cfg80211_chan_def *chandef,
1300 size_t *offset)
de95a54b
JB		 1301{
1302 struct ieee80211_supported_band *sband;
c604b9f2 1303 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1304 size_t noffset;
8e664fb3 1305 int supp_rates_len, i;
8dcb2003
JM		 1306 u8 rates[32];
1307 int num_rates;
1308 int ext_rates_len;
2103dec1
SW		 1309 int shift;
1310 u32 rate_flags;
de95a54b 1311
c56ef672
DS		 1312 *offset = 0;
1313
4d36ec58 1314 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1315 if (WARN_ON_ONCE(!sband))
1316 return 0;
de95a54b 1317
2103dec1
SW		 1318 rate_flags = ieee80211_chandef_rate_flags(chandef);
1319 shift = ieee80211_chandef_get_shift(chandef);
1320
8dcb2003
JM		 1321 num_rates = 0;
1322 for (i = 0; i < sband->n_bitrates; i++) {
1323 if ((BIT(i) & rate_mask) == 0)
1324 continue; /* skip rate */
2103dec1
SW		 1325 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1326 continue;
1327
1328 rates[num_rates++] =
1329 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1330 (1 << shift) * 5);
8dcb2003
JM		 1331 }
1332
1333 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1334
c604b9f2
JB		 1335 if (end - pos < 2 + supp_rates_len)
1336 goto out_err;
de95a54b 1337 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1338 *pos++ = supp_rates_len;
8dcb2003
JM		 1339 memcpy(pos, rates, supp_rates_len);
1340 pos += supp_rates_len;
8e664fb3
JB		 1341
1342 /* insert "request information" if in custom IEs */
1343 if (ie && ie_len) {
1344 static const u8 before_extrates[] = {
1345 WLAN_EID_SSID,
1346 WLAN_EID_SUPP_RATES,
1347 WLAN_EID_REQUEST,
1348 };
1349 noffset = ieee80211_ie_split(ie, ie_len,
1350 before_extrates,
1351 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1352 *offset);
1353 if (end - pos < noffset - *offset)
c604b9f2 1354 goto out_err;
c56ef672
DS		 1355 memcpy(pos, ie + *offset, noffset - *offset);
1356 pos += noffset - *offset;
1357 *offset = noffset;
8e664fb3
JB		 1358 }
1359
8dcb2003
JM		 1360 ext_rates_len = num_rates - supp_rates_len;
1361 if (ext_rates_len > 0) {
c604b9f2
JB		 1362 if (end - pos < 2 + ext_rates_len)
1363 goto out_err;
8e664fb3 1364 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1365 *pos++ = ext_rates_len;
1366 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1367 pos += ext_rates_len;
8e664fb3
JB		 1368 }
1369
2103dec1 1370 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1371 if (end - pos < 3)
1372 goto out_err;
651b5225
JM		 1373 *pos++ = WLAN_EID_DS_PARAMS;
1374 *pos++ = 1;
2103dec1
SW		 1375 *pos++ = ieee80211_frequency_to_channel(
1376 chandef->chan->center_freq);
651b5225
JM		 1377 }
1378
8e664fb3
JB		 1379 /* insert custom IEs that go before HT */
1380 if (ie && ie_len) {
1381 static const u8 before_ht[] = {
1382 WLAN_EID_SSID,
1383 WLAN_EID_SUPP_RATES,
1384 WLAN_EID_REQUEST,
1385 WLAN_EID_EXT_SUPP_RATES,
1386 WLAN_EID_DS_PARAMS,
1387 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1388 };
1389 noffset = ieee80211_ie_split(ie, ie_len,
1390 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1391 *offset);
1392 if (end - pos < noffset - *offset)
c604b9f2 1393 goto out_err;
c56ef672
DS		 1394 memcpy(pos, ie + *offset, noffset - *offset);
1395 pos += noffset - *offset;
1396 *offset = noffset;
de95a54b
JB		 1397 }
1398
c604b9f2
JB		 1399 if (sband->ht_cap.ht_supported) {
1400 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1401 goto out_err;
ef96a842
BG		 1402 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1403 sband->ht_cap.cap);
c604b9f2 1404 }
5ef2d41a 1405
de95a54b
JB		 1406 /*
1407 * If adding more here, adjust code in main.c
1408 * that calculates local->scan_ies_len.
1409 */
1410
4d952300 1411 /* insert custom IEs that go before VHT */
8e664fb3 1412 if (ie && ie_len) {
4d952300
JB		 1413 static const u8 before_vht[] = {
1414 WLAN_EID_SSID,
1415 WLAN_EID_SUPP_RATES,
1416 WLAN_EID_REQUEST,
1417 WLAN_EID_EXT_SUPP_RATES,
1418 WLAN_EID_DS_PARAMS,
1419 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1420 WLAN_EID_HT_CAPABILITY,
1421 WLAN_EID_BSS_COEX_2040,
1422 WLAN_EID_EXT_CAPABILITY,
1423 WLAN_EID_SSID_LIST,
1424 WLAN_EID_CHANNEL_USAGE,
1425 WLAN_EID_INTERWORKING,
1426 /* mesh ID can't happen here */
1427 /* 60 GHz can't happen here right now */
1428 };
1429 noffset = ieee80211_ie_split(ie, ie_len,
1430 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1431 *offset);
1432 if (end - pos < noffset - *offset)
c604b9f2 1433 goto out_err;
c56ef672
DS		 1434 memcpy(pos, ie + *offset, noffset - *offset);
1435 pos += noffset - *offset;
1436 *offset = noffset;
de95a54b
JB		 1437 }
1438
c604b9f2
JB		 1439 if (sband->vht_cap.vht_supported) {
1440 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1441 goto out_err;
ba0afa2f
MP		 1442 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1443 sband->vht_cap.cap);
c604b9f2 1444 }
ba0afa2f 1445
c604b9f2
JB		 1446 return pos - buffer;
1447 out_err:
1448 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1449 return pos - buffer;
1450}
1451
c56ef672
DS		 1452int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1453 size_t buffer_len,
1454 struct ieee80211_scan_ies *ie_desc,
1455 const u8 *ie, size_t ie_len,
1456 u8 bands_used, u32 *rate_masks,
1457 struct cfg80211_chan_def *chandef)
1458{
1459 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1460 int i;
1461
1462 memset(ie_desc, 0, sizeof(*ie_desc));
1463
1464 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1465 if (bands_used & BIT(i)) {
1466 pos += ieee80211_build_preq_ies_band(local,
1467 buffer + pos,
1468 buffer_len - pos,
1469 ie, ie_len, i,
1470 rate_masks[i],
1471 chandef,
1472 &custom_ie_offset);
1473 ie_desc->ies[i] = buffer + old_pos;
1474 ie_desc->len[i] = pos - old_pos;
1475 old_pos = pos;
1476 }
1477 }
1478
1479 /* add any remaining custom IEs */
1480 if (ie && ie_len) {
1481 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1482 "not enough space for preq custom IEs\n"))
1483 return pos;
1484 memcpy(buffer + pos, ie + custom_ie_offset,
1485 ie_len - custom_ie_offset);
1486 ie_desc->common_ies = buffer + pos;
1487 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1488 pos += ie_len - custom_ie_offset;
1489 }
1490
1491 return pos;
1492};
1493
a619a4c0 1494struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
85a237fe 1495 u8 *dst, u32 ratemask,
6b77863b 1496 struct ieee80211_channel *chan,
a619a4c0 1497 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1498 const u8 *ie, size_t ie_len,
1499 bool directed)
46900298
JB		 1500{
1501 struct ieee80211_local *local = sdata->local;
2103dec1 1502 struct cfg80211_chan_def chandef;
46900298
JB		 1503 struct sk_buff *skb;
1504 struct ieee80211_mgmt *mgmt;
b9a9ada1 1505 int ies_len;
c56ef672
DS		 1506 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1507 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1508
a806c558
PS		 1509 /*
1510 * Do not send DS Channel parameter for directed probe requests
1511 * in order to maximize the chance that we get a response. Some
1512 * badly-behaved APs don't respond when this parameter is included.
1513 */
2103dec1 1514 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1515 if (directed)
2103dec1 1516 chandef.chan = NULL;
a806c558 1517 else
2103dec1 1518 chandef.chan = chan;
651b5225 1519
7c12ce8b 1520 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
b9a9ada1 1521 ssid, ssid_len, 100 + ie_len);
5b2bbf75 1522 if (!skb)
b9a9ada1
JB		 1523 return NULL;
1524
c56ef672 1525 rate_masks[chan->band] = ratemask;
b9a9ada1 1526 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1527 skb_tailroom(skb), &dummy_ie_desc,
1528 ie, ie_len, BIT(chan->band),
1529 rate_masks, &chandef);
b9a9ada1 1530 skb_put(skb, ies_len);
7c12ce8b 1531
46900298 1532 if (dst) {
7c12ce8b 1533 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1534 memcpy(mgmt->da, dst, ETH_ALEN);
1535 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1536 }
46900298 1537
62ae67be 1538 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1539
a619a4c0
JO		 1540 return skb;
1541}
1542
1543void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1544 const u8 *ssid, size_t ssid_len,
a806c558 1545 const u8 *ie, size_t ie_len,
1672c0e3 1546 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1547 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1548{
1549 struct sk_buff *skb;
1550
fe94fe05 1551 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
6b77863b 1552 ssid, ssid_len,
85a237fe 1553 ie, ie_len, directed);
aad14ceb 1554 if (skb) {
1672c0e3 1555 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1556 if (scan)
1557 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1558 else
1559 ieee80211_tx_skb(sdata, skb);
aad14ceb 1560 }
46900298
JB		 1561}
1562
2103dec1 1563u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1564 struct ieee802_11_elems *elems,
9ebb61a2 1565 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1566{
1567 struct ieee80211_supported_band *sband;
46900298 1568 size_t num_rates;
2103dec1
SW		 1569 u32 supp_rates, rate_flags;
1570 int i, j, shift;
1571 sband = sdata->local->hw.wiphy->bands[band];
1572
1573 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1574 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1575
4ee73f33
MK		 1576 if (WARN_ON(!sband))
1577 return 1;
46900298 1578
46900298
JB		 1579 num_rates = sband->n_bitrates;
1580 supp_rates = 0;
1581 for (i = 0; i < elems->supp_rates_len +
1582 elems->ext_supp_rates_len; i++) {
1583 u8 rate = 0;
1584 int own_rate;
9ebb61a2 1585 bool is_basic;
46900298
JB		 1586 if (i < elems->supp_rates_len)
1587 rate = elems->supp_rates[i];
1588 else if (elems->ext_supp_rates)
1589 rate = elems->ext_supp_rates
1590 [i - elems->supp_rates_len];
1591 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1592 is_basic = !!(rate & 0x80);
1593
1594 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1595 continue;
1596
1597 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1598 int brate;
1599 if ((rate_flags & sband->bitrates[j].flags)
1600 != rate_flags)
1601 continue;
1602
1603 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1604 1 << shift);
1605
1606 if (brate == own_rate) {
46900298 1607 supp_rates |= BIT(j);
9ebb61a2
AN		 1608 if (basic_rates && is_basic)
1609 *basic_rates |= BIT(j);
1610 }
1611 }
46900298
JB		 1612 }
1613 return supp_rates;
1614}
f2753ddb 1615
84f6a01c
JB		 1616void ieee80211_stop_device(struct ieee80211_local *local)
1617{
1618 ieee80211_led_radio(local, false);
67408c8c 1619 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1620
1621 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1622
1623 flush_workqueue(local->workqueue);
678f415f 1624 drv_stop(local);
84f6a01c
JB		 1625}
1626
f6837ba8
JB		 1627static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1628{
1629 struct ieee80211_sub_if_data *sdata;
1630 struct ieee80211_chanctx *ctx;
1631
1632 /*
1633 * We get here if during resume the device can't be restarted properly.
1634 * We might also get here if this happens during HW reset, which is a
1635 * slightly different situation and we need to drop all connections in
1636 * the latter case.
1637 *
1638 * Ask cfg80211 to turn off all interfaces, this will result in more
1639 * warnings but at least we'll then get into a clean stopped state.
1640 */
1641
1642 local->resuming = false;
1643 local->suspended = false;
1644 local->started = false;
1645
1646 /* scheduled scan clearly can't be running any more, but tell
1647 * cfg80211 and clear local state
1648 */
1649 ieee80211_sched_scan_end(local);
1650
1651 list_for_each_entry(sdata, &local->interfaces, list)
1652 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1653
1654 /* Mark channel contexts as not being in the driver any more to avoid
1655 * removing them from the driver during the shutdown process...
1656 */
1657 mutex_lock(&local->chanctx_mtx);
1658 list_for_each_entry(ctx, &local->chanctx_list, list)
1659 ctx->driver_present = false;
1660 mutex_unlock(&local->chanctx_mtx);
1661
1662 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1663}
1664
153a5fc4
SG		 1665static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1666 struct ieee80211_sub_if_data *sdata)
1667{
1668 struct ieee80211_chanctx_conf *conf;
1669 struct ieee80211_chanctx *ctx;
1670
1671 if (!local->use_chanctx)
1672 return;
1673
1674 mutex_lock(&local->chanctx_mtx);
1675 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1676 lockdep_is_held(&local->chanctx_mtx));
1677 if (conf) {
1678 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1679 drv_assign_vif_chanctx(local, sdata, ctx);
1680 }
1681 mutex_unlock(&local->chanctx_mtx);
1682}
1683
f2753ddb
JB		 1684int ieee80211_reconfig(struct ieee80211_local *local)
1685{
1686 struct ieee80211_hw *hw = &local->hw;
1687 struct ieee80211_sub_if_data *sdata;
55de908a 1688 struct ieee80211_chanctx *ctx;
f2753ddb 1689 struct sta_info *sta;
2683d65b 1690 int res, i;
d888130a 1691 bool reconfig_due_to_wowlan = false;
d43c6b6e
DS		 1692 struct ieee80211_sub_if_data *sched_scan_sdata;
1693 bool sched_scan_stopped = false;
d888130a 1694
8f21b0ad 1695#ifdef CONFIG_PM
ceb99fe0
JB		 1696 if (local->suspended)
1697 local->resuming = true;
f2753ddb 1698
eecc4800 1699 if (local->wowlan) {
eecc4800 1700 res = drv_resume(local);
27b3eb9c 1701 local->wowlan = false;
eecc4800
JB		 1702 if (res < 0) {
1703 local->resuming = false;
1704 return res;
1705 }
1706 if (res == 0)
1707 goto wake_up;
1708 WARN_ON(res > 1);
1709 /*
1710 * res is 1, which means the driver requested
1711 * to go through a regular reset on wakeup.
1712 */
d888130a 1713 reconfig_due_to_wowlan = true;
eecc4800
JB		 1714 }
1715#endif
94f9b97b
JB		 1716 /* everything else happens only if HW was up & running */
1717 if (!local->open_count)
1718 goto wake_up;
f2753ddb 1719
94f9b97b
JB		 1720 /*
1721 * Upon resume hardware can sometimes be goofy due to
1722 * various platform / driver / bus issues, so restarting
1723 * the device may at times not work immediately. Propagate
1724 * the error.
1725 */
1726 res = drv_start(local);
1727 if (res) {
f6837ba8
JB		 1728 if (local->suspended)
1729 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1730 else
1731 WARN(1, "Hardware became unavailable during restart.\n");
1732 ieee80211_handle_reconfig_failure(local);
94f9b97b 1733 return res;
f2753ddb
JB		 1734 }
1735
7f281975
YAP		 1736 /* setup fragmentation threshold */
1737 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1738
1739 /* setup RTS threshold */
1740 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1741
1742 /* reset coverage class */
1743 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1744
94f9b97b
JB		 1745 ieee80211_led_radio(local, true);
1746 ieee80211_mod_tpt_led_trig(local,
1747 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1748
f2753ddb 1749 /* add interfaces */
4b6f1dd6
JB		 1750 sdata = rtnl_dereference(local->monitor_sdata);
1751 if (sdata) {
3c3e21e7
JB		 1752 /* in HW restart it exists already */
1753 WARN_ON(local->resuming);
4b6f1dd6
JB		 1754 res = drv_add_interface(local, sdata);
1755 if (WARN_ON(res)) {
0c2bef46 1756 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1757 synchronize_net();
1758 kfree(sdata);
1759 }
1760 }
1761
f2753ddb
JB		 1762 list_for_each_entry(sdata, &local->interfaces, list) {
1763 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1764 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1765 ieee80211_sdata_running(sdata))
7b7eab6f 1766 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1767 }
1768
55de908a 1769 /* add channel contexts */
f0dea9c7
AS		 1770 if (local->use_chanctx) {
1771 mutex_lock(&local->chanctx_mtx);
1772 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1773 if (ctx->replace_state !=
1774 IEEE80211_CHANCTX_REPLACES_OTHER)
1775 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1776 mutex_unlock(&local->chanctx_mtx);
55de908a 1777
7df180f7
ZG		 1778 list_for_each_entry(sdata, &local->interfaces, list) {
1779 if (!ieee80211_sdata_running(sdata))
1780 continue;
1781 ieee80211_assign_chanctx(local, sdata);
1782 }
6352c87f 1783
7df180f7
ZG		 1784 sdata = rtnl_dereference(local->monitor_sdata);
1785 if (sdata && ieee80211_sdata_running(sdata))
1786 ieee80211_assign_chanctx(local, sdata);
1787 }
fe5f2559 1788
f2753ddb 1789 /* add STAs back */
34e89507
JB		 1790 mutex_lock(&local->sta_mtx);
1791 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1792 enum ieee80211_sta_state state;
f09603a2 1793
2e8d397e
AN		 1794 if (!sta->uploaded)
1795 continue;
1796
1797 /* AP-mode stations will be added later */
1798 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1799 continue;
1800
1801 for (state = IEEE80211_STA_NOTEXIST;
1802 state < sta->sta_state; state++)
1803 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1804 state + 1));
f2753ddb 1805 }
34e89507 1806 mutex_unlock(&local->sta_mtx);
f2753ddb 1807
2683d65b 1808 /* reconfigure tx conf */
54bcbc69
JB		 1809 if (hw->queues >= IEEE80211_NUM_ACS) {
1810 list_for_each_entry(sdata, &local->interfaces, list) {
1811 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1812 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1813 !ieee80211_sdata_running(sdata))
1814 continue;
f6f3def3 1815
54bcbc69
JB		 1816 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1817 drv_conf_tx(local, sdata, i,
1818 &sdata->tx_conf[i]);
1819 }
f6f3def3 1820 }
2683d65b 1821
f2753ddb
JB		 1822 /* reconfigure hardware */
1823 ieee80211_hw_config(local, ~0);
1824
f2753ddb 1825 ieee80211_configure_filter(local);
f2753ddb
JB		 1826
1827 /* Finally also reconfigure all the BSS information */
1828 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1829 u32 changed;
1830
9607e6b6 1831 if (!ieee80211_sdata_running(sdata))
f2753ddb 1832 continue;
ac8dd506
JB		 1833
1834 /* common change flags for all interface types */
1835 changed = BSS_CHANGED_ERP_CTS_PROT |
1836 BSS_CHANGED_ERP_PREAMBLE |
1837 BSS_CHANGED_ERP_SLOT |
1838 BSS_CHANGED_HT |
1839 BSS_CHANGED_BASIC_RATES |
1840 BSS_CHANGED_BEACON_INT |
1841 BSS_CHANGED_BSSID |
4ced3f74 1842 BSS_CHANGED_CQM |
55de47f6 1843 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1844 BSS_CHANGED_IDLE |
1845 BSS_CHANGED_TXPOWER;
ac8dd506 1846
f2753ddb
JB		 1847 switch (sdata->vif.type) {
1848 case NL80211_IFTYPE_STATION:
0d392e93 1849 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1850 BSS_CHANGED_ARP_FILTER |
1851 BSS_CHANGED_PS;
c65dd147 1852
989c6505
AB		 1853 /* Re-send beacon info report to the driver */
1854 if (sdata->u.mgd.have_beacon)
1855 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1856
8d61ffa5 1857 sdata_lock(sdata);
ac8dd506 1858 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1859 sdata_unlock(sdata);
ac8dd506 1860 break;
6e0bd6c3 1861 case NL80211_IFTYPE_OCB:
239281f8
RL		 1862 changed |= BSS_CHANGED_OCB;
1863 ieee80211_bss_info_change_notify(sdata, changed);
6e0bd6c3 1864 break;
f2753ddb 1865 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1866 changed |= BSS_CHANGED_IBSS;
1867 /* fall through */
f2753ddb 1868 case NL80211_IFTYPE_AP:
339afbf4 1869 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1870
1041638f 1871 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1872 changed |= BSS_CHANGED_AP_PROBE_RESP;
1873
1041638f
JB		 1874 if (rcu_access_pointer(sdata->u.ap.beacon))
1875 drv_start_ap(local, sdata);
1876 }
1877
7827493b 1878 /* fall through */
f2753ddb 1879 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1880 if (sdata->vif.bss_conf.enable_beacon) {
1881 changed |= BSS_CHANGED_BEACON |
1882 BSS_CHANGED_BEACON_ENABLED;
1883 ieee80211_bss_info_change_notify(sdata, changed);
1884 }
f2753ddb
JB		 1885 break;
1886 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1887 case NL80211_IFTYPE_AP_VLAN:
1888 case NL80211_IFTYPE_MONITOR:
98104fde 1889 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1890 /* nothing to do */
f142c6b9 1891 break;
f2753ddb 1892 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1893 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1894 case NL80211_IFTYPE_P2P_CLIENT:
1895 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1896 WARN_ON(1);
1897 break;
1898 }
1899 }
1900
8e1b23b9
ES		 1901 ieee80211_recalc_ps(local, -1);
1902
6e1b1b24
EP		 1903 /*
1904 * The sta might be in psm against the ap (e.g. because
1905 * this was the state before a hw restart), so we
1906 * explicitly send a null packet in order to make sure
1907 * it'll sync against the ap (and get out of psm).
1908 */
1909 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1910 list_for_each_entry(sdata, &local->interfaces, list) {
1911 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1912 continue;
20f544ee
JB		 1913 if (!sdata->u.mgd.associated)
1914 continue;
6e1b1b24
EP		 1915
1916 ieee80211_send_nullfunc(local, sdata, 0);
1917 }
1918 }
1919
2e8d397e
AN		 1920 /* APs are now beaconing, add back stations */
1921 mutex_lock(&local->sta_mtx);
1922 list_for_each_entry(sta, &local->sta_list, list) {
1923 enum ieee80211_sta_state state;
1924
1925 if (!sta->uploaded)
1926 continue;
1927
1928 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1929 continue;
1930
1931 for (state = IEEE80211_STA_NOTEXIST;
1932 state < sta->sta_state; state++)
1933 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1934 state + 1));
1935 }
1936 mutex_unlock(&local->sta_mtx);
1937
7b21aea0
ES		 1938 /* add back keys */
1939 list_for_each_entry(sdata, &local->interfaces, list)
1940 if (ieee80211_sdata_running(sdata))
1941 ieee80211_enable_keys(sdata);
1942
c6209488 1943 wake_up:
04800ada
AN		 1944 local->in_reconfig = false;
1945 barrier();
1946
3c3e21e7
JB		 1947 if (local->monitors == local->open_count && local->monitors > 0)
1948 ieee80211_add_virtual_monitor(local);
1949
2a419056
JB		 1950 /*
1951 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1952 * sessions can be established after a resume.
1953 *
1954 * Also tear down aggregation sessions since reconfiguring
1955 * them in a hardware restart scenario is not easily done
1956 * right now, and the hardware will have lost information
1957 * about the sessions, but we and the AP still think they
1958 * are active. This is really a workaround though.
1959 */
74e2bd1f 1960 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 1961 mutex_lock(&local->sta_mtx);
1962
1963 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 1964 ieee80211_sta_tear_down_BA_sessions(
1965 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 1966 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 1967 }
2a419056
JB		 1968
1969 mutex_unlock(&local->sta_mtx);
74e2bd1f 1970 }
74e2bd1f 1971
445ea4e8 1972 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1973 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1974 false);
f2753ddb 1975
32769814
AN		 1976 /*
1977 * Reconfigure sched scan if it was interrupted by FW restart or
1978 * suspend.
1979 */
1980 mutex_lock(&local->mtx);
1981 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1982 lockdep_is_held(&local->mtx));
1983 if (sched_scan_sdata && local->sched_scan_req)
1984 /*
1985 * Sched scan stopped, but we don't want to report it. Instead,
1986 * we're trying to reschedule.
1987 */
1988 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1989 local->sched_scan_req))
1990 sched_scan_stopped = true;
1991 mutex_unlock(&local->mtx);
1992
1993 if (sched_scan_stopped)
e669ba2d 1994 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 1995
5bb644a0
JB		 1996 /*
1997 * If this is for hw restart things are still running.
1998 * We may want to change that later, however.
1999 */
8f21b0ad 2000 if (!local->suspended || reconfig_due_to_wowlan)
9214ad7f 2001 drv_restart_complete(local);
8f21b0ad
JB		 2002
2003 if (!local->suspended)
5bb644a0
JB		 2004 return 0;
2005
2006#ifdef CONFIG_PM
ceb99fe0 2007 /* first set suspended false, then resuming */
5bb644a0 2008 local->suspended = false;
ceb99fe0
JB		 2009 mb();
2010 local->resuming = false;
5bb644a0 2011
b8360ab8
JB		 2012 list_for_each_entry(sdata, &local->interfaces, list) {
2013 if (!ieee80211_sdata_running(sdata))
2014 continue;
2015 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2016 ieee80211_sta_restart(sdata);
2017 }
2018
26d59535 2019 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 2020#else
2021 WARN_ON(1);
2022#endif
d43c6b6e 2023
f2753ddb
JB		 2024 return 0;
2025}
42935eca 2026
95acac61
JB		 2027void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2028{
2029 struct ieee80211_sub_if_data *sdata;
2030 struct ieee80211_local *local;
2031 struct ieee80211_key *key;
2032
2033 if (WARN_ON(!vif))
2034 return;
2035
2036 sdata = vif_to_sdata(vif);
2037 local = sdata->local;
2038
2039 if (WARN_ON(!local->resuming))
2040 return;
2041
2042 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2043 return;
2044
2045 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2046
2047 mutex_lock(&local->key_mtx);
2048 list_for_each_entry(key, &sdata->key_list, list)
2049 key->flags |= KEY_FLAG_TAINTED;
2050 mutex_unlock(&local->key_mtx);
2051}
2052EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2053
04ecd257 2054void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2055{
04ecd257
JB		 2056 struct ieee80211_local *local = sdata->local;
2057 struct ieee80211_chanctx_conf *chanctx_conf;
2058 struct ieee80211_chanctx *chanctx;
025e6be2 2059
04ecd257 2060 mutex_lock(&local->chanctx_mtx);
0f78231b 2061
04ecd257
JB		 2062 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2063 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2064
04ecd257 2065 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2066 goto unlock;
0f78231b 2067
04ecd257
JB		 2068 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2069 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2070 unlock:
04ecd257 2071 mutex_unlock(&local->chanctx_mtx);
0f78231b 2072}
8e664fb3 2073
21f659bf
EP		 2074void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2075{
2076 struct ieee80211_local *local = sdata->local;
2077 struct ieee80211_chanctx_conf *chanctx_conf;
2078 struct ieee80211_chanctx *chanctx;
2079
2080 mutex_lock(&local->chanctx_mtx);
2081
2082 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2083 lockdep_is_held(&local->chanctx_mtx));
2084
2085 if (WARN_ON_ONCE(!chanctx_conf))
2086 goto unlock;
2087
2088 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2089 ieee80211_recalc_chanctx_min_def(local, chanctx);
2090 unlock:
2091 mutex_unlock(&local->chanctx_mtx);
2092}
2093
8e664fb3
JB		 2094static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2095{
2096 int i;
2097
2098 for (i = 0; i < n_ids; i++)
2099 if (ids[i] == id)
2100 return true;
2101 return false;
2102}
2103
8ed28747
JB		 2104size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2105 const u8 *ids, int n_ids,
2106 const u8 *after_ric, int n_after_ric,
2107 size_t offset)
8e664fb3
JB		 2108{
2109 size_t pos = offset;
2110
8ed28747
JB		 2111 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2112 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2113 pos += 2 + ies[pos + 1];
2114
2115 while (pos < ielen &&
2116 !ieee80211_id_in_list(after_ric, n_after_ric,
2117 ies[pos]))
2118 pos += 2 + ies[pos + 1];
2119 } else {
2120 pos += 2 + ies[pos + 1];
2121 }
2122 }
8e664fb3
JB		 2123
2124 return pos;
2125}
8ed28747
JB		 2126
2127size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2128 const u8 *ids, int n_ids, size_t offset)
2129{
2130 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2131}
a7f3a768 2132EXPORT_SYMBOL(ieee80211_ie_split);
8e664fb3
JB		 2133
2134size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2135{
2136 size_t pos = offset;
2137
2138 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2139 pos += 2 + ies[pos + 1];
2140
2141 return pos;
2142}
615f7b9b
MV		 2143
2144static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2145 int rssi_min_thold,
2146 int rssi_max_thold)
2147{
2148 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2149
2150 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2151 return;
2152
2153 /*
2154 * Scale up threshold values before storing it, as the RSSI averaging
2155 * algorithm uses a scaled up value as well. Change this scaling
2156 * factor if the RSSI averaging algorithm changes.
2157 */
2158 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2159 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2160}
2161
2162void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2163 int rssi_min_thold,
2164 int rssi_max_thold)
2165{
2166 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2167
2168 WARN_ON(rssi_min_thold == rssi_max_thold ||
2169 rssi_min_thold > rssi_max_thold);
2170
2171 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2172 rssi_max_thold);
2173}
2174EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2175
2176void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2177{
2178 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2179
2180 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2181}
2182EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2183
ef96a842 2184u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2185 u16 cap)
2186{
2187 __le16 tmp;
2188
2189 *pos++ = WLAN_EID_HT_CAPABILITY;
2190 *pos++ = sizeof(struct ieee80211_ht_cap);
2191 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2192
2193 /* capability flags */
2194 tmp = cpu_to_le16(cap);
2195 memcpy(pos, &tmp, sizeof(u16));
2196 pos += sizeof(u16);
2197
2198 /* AMPDU parameters */
ef96a842
BG		 2199 *pos++ = ht_cap->ampdu_factor |
2200 (ht_cap->ampdu_density <<
42e7aa77
AS		 2201 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2202
2203 /* MCS set */
ef96a842
BG		 2204 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2205 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2206
2207 /* extended capabilities */
2208 pos += sizeof(__le16);
2209
2210 /* BF capabilities */
2211 pos += sizeof(__le32);
2212
2213 /* antenna selection */
2214 pos += sizeof(u8);
2215
2216 return pos;
2217}
2218
ba0afa2f 2219u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2220 u32 cap)
ba0afa2f
MP		 2221{
2222 __le32 tmp;
2223
2224 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2225 *pos++ = sizeof(struct ieee80211_vht_cap);
2226 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2227
2228 /* capability flags */
2229 tmp = cpu_to_le32(cap);
2230 memcpy(pos, &tmp, sizeof(u32));
2231 pos += sizeof(u32);
2232
2233 /* VHT MCS set */
2234 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2235 pos += sizeof(vht_cap->vht_mcs);
2236
2237 return pos;
2238}
2239
074d46d1 2240u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2241 const struct cfg80211_chan_def *chandef,
431e3154 2242 u16 prot_mode)
42e7aa77 2243{
074d46d1 2244 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2245 /* Build HT Information */
074d46d1
JB		 2246 *pos++ = WLAN_EID_HT_OPERATION;
2247 *pos++ = sizeof(struct ieee80211_ht_operation);
2248 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2249 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2250 chandef->chan->center_freq);
2251 switch (chandef->width) {
2252 case NL80211_CHAN_WIDTH_160:
2253 case NL80211_CHAN_WIDTH_80P80:
2254 case NL80211_CHAN_WIDTH_80:
2255 case NL80211_CHAN_WIDTH_40:
2256 if (chandef->center_freq1 > chandef->chan->center_freq)
2257 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2258 else
2259 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2260 break;
42e7aa77 2261 default:
074d46d1 2262 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2263 break;
2264 }
aee286c2 2265 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2266 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2267 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2268 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2269
431e3154 2270 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2271 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2272
2273 /* It seems that Basic MCS set and Supported MCS set
2274 are identical for the first 10 bytes */
074d46d1
JB		 2275 memset(&ht_oper->basic_set, 0, 16);
2276 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2277
074d46d1 2278 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2279}
2280
4bf88530 2281void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2282 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2283 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2284{
2285 enum nl80211_channel_type channel_type;
2286
4bf88530
JB		 2287 if (!ht_oper) {
2288 cfg80211_chandef_create(chandef, control_chan,
2289 NL80211_CHAN_NO_HT);
2290 return;
2291 }
42e7aa77 2292
074d46d1 2293 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2294 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2295 channel_type = NL80211_CHAN_HT20;
2296 break;
2297 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2298 channel_type = NL80211_CHAN_HT40PLUS;
2299 break;
2300 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2301 channel_type = NL80211_CHAN_HT40MINUS;
2302 break;
2303 default:
2304 channel_type = NL80211_CHAN_NO_HT;
2305 }
2306
4bf88530 2307 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2308}
2309
2103dec1
SW		 2310int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2311 const struct ieee80211_supported_band *sband,
2312 const u8 *srates, int srates_len, u32 *rates)
2313{
2314 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2315 int shift = ieee80211_chandef_get_shift(chandef);
2316 struct ieee80211_rate *br;
2317 int brate, rate, i, j, count = 0;
2318
2319 *rates = 0;
2320
2321 for (i = 0; i < srates_len; i++) {
2322 rate = srates[i] & 0x7f;
2323
2324 for (j = 0; j < sband->n_bitrates; j++) {
2325 br = &sband->bitrates[j];
2326 if ((rate_flags & br->flags) != rate_flags)
2327 continue;
2328
2329 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2330 if (brate == rate) {
2331 *rates |= BIT(j);
2332 count++;
2333 break;
2334 }
2335 }
2336 }
2337 return count;
2338}
2339
fc8a7321 2340int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2341 struct sk_buff *skb, bool need_basic,
2342 enum ieee80211_band band)
768db343 2343{
768db343
AN		 2344 struct ieee80211_local *local = sdata->local;
2345 struct ieee80211_supported_band *sband;
2103dec1 2346 int rate, shift;
768db343 2347 u8 i, rates, *pos;
fc8a7321 2348 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2349 u32 rate_flags;
768db343 2350
2103dec1
SW		 2351 shift = ieee80211_vif_get_shift(&sdata->vif);
2352 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2353 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2354 rates = 0;
2355 for (i = 0; i < sband->n_bitrates; i++) {
2356 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2357 continue;
2358 rates++;
2359 }
768db343
AN		 2360 if (rates > 8)
2361 rates = 8;
2362
2363 if (skb_tailroom(skb) < rates + 2)
2364 return -ENOMEM;
2365
2366 pos = skb_put(skb, rates + 2);
2367 *pos++ = WLAN_EID_SUPP_RATES;
2368 *pos++ = rates;
2369 for (i = 0; i < rates; i++) {
657c3e0c 2370 u8 basic = 0;
2103dec1
SW		 2371 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2372 continue;
2373
657c3e0c
AN		 2374 if (need_basic && basic_rates & BIT(i))
2375 basic = 0x80;
768db343 2376 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2377 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2378 5 * (1 << shift));
2379 *pos++ = basic | (u8) rate;
768db343
AN		 2380 }
2381
2382 return 0;
2383}
2384
fc8a7321 2385int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2386 struct sk_buff *skb, bool need_basic,
2387 enum ieee80211_band band)
768db343 2388{
768db343
AN		 2389 struct ieee80211_local *local = sdata->local;
2390 struct ieee80211_supported_band *sband;
cc63ec76 2391 int rate, shift;
768db343 2392 u8 i, exrates, *pos;
fc8a7321 2393 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2394 u32 rate_flags;
2395
2396 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2397 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2398
6b77863b 2399 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2400 exrates = 0;
2401 for (i = 0; i < sband->n_bitrates; i++) {
2402 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2403 continue;
2404 exrates++;
2405 }
2406
768db343
AN		 2407 if (exrates > 8)
2408 exrates -= 8;
2409 else
2410 exrates = 0;
2411
2412 if (skb_tailroom(skb) < exrates + 2)
2413 return -ENOMEM;
2414
2415 if (exrates) {
2416 pos = skb_put(skb, exrates + 2);
2417 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2418 *pos++ = exrates;
2419 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2420 u8 basic = 0;
2103dec1
SW		 2421 if ((rate_flags & sband->bitrates[i].flags)
2422 != rate_flags)
2423 continue;
657c3e0c
AN		 2424 if (need_basic && basic_rates & BIT(i))
2425 basic = 0x80;
2103dec1
SW		 2426 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2427 5 * (1 << shift));
2428 *pos++ = basic | (u8) rate;
768db343
AN		 2429 }
2430 }
2431 return 0;
2432}
1dae27f8
WYG		 2433
2434int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2435{
2436 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2438
be6bcabc
WYG		 2439 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2440 /* non-managed type inferfaces */
2441 return 0;
2442 }
3a7bba64 2443 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2444}
0d8a0a17 2445EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2446
2447u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2448{
2449 if (!mcs)
2450 return 1;
2451
2452 /* TODO: consider rx_highest */
2453
2454 if (mcs->rx_mask[3])
2455 return 4;
2456 if (mcs->rx_mask[2])
2457 return 3;
2458 if (mcs->rx_mask[1])
2459 return 2;
2460 return 1;
2461}
f4bda337
TP		 2462
2463/**
2464 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2465 * @local: mac80211 hw info struct
2466 * @status: RX status
2467 * @mpdu_len: total MPDU length (including FCS)
2468 * @mpdu_offset: offset into MPDU to calculate timestamp at
2469 *
2470 * This function calculates the RX timestamp at the given MPDU offset, taking
2471 * into account what the RX timestamp was. An offset of 0 will just normalize
2472 * the timestamp to TSF at beginning of MPDU reception.
2473 */
2474u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2475 struct ieee80211_rx_status *status,
2476 unsigned int mpdu_len,
2477 unsigned int mpdu_offset)
2478{
2479 u64 ts = status->mactime;
2480 struct rate_info ri;
2481 u16 rate;
2482
2483 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2484 return 0;
2485
2486 memset(&ri, 0, sizeof(ri));
2487
2488 /* Fill cfg80211 rate info */
2489 if (status->flag & RX_FLAG_HT) {
2490 ri.mcs = status->rate_idx;
2491 ri.flags |= RATE_INFO_FLAGS_MCS;
2492 if (status->flag & RX_FLAG_40MHZ)
2493 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2494 if (status->flag & RX_FLAG_SHORT_GI)
2495 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2496 } else if (status->flag & RX_FLAG_VHT) {
2497 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2498 ri.mcs = status->rate_idx;
2499 ri.nss = status->vht_nss;
2500 if (status->flag & RX_FLAG_40MHZ)
2501 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
1b8d242a 2502 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
5614618e 2503 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
1b8d242a 2504 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
5614618e 2505 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
1b8d242a 2506 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
5614618e
JB		 2507 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2508 if (status->flag & RX_FLAG_SHORT_GI)
2509 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2510 } else {
2511 struct ieee80211_supported_band *sband;
2103dec1
SW		 2512 int shift = 0;
2513 int bitrate;
2514
2515 if (status->flag & RX_FLAG_10MHZ)
2516 shift = 1;
2517 if (status->flag & RX_FLAG_5MHZ)
2518 shift = 2;
f4bda337
TP		 2519
2520 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2521 bitrate = sband->bitrates[status->rate_idx].bitrate;
2522 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2523 }
2524
2525 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2526 if (WARN_ONCE(!rate,
2527 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2528 status->flag, status->rate_idx, status->vht_nss))
2529 return 0;
f4bda337
TP		 2530
2531 /* rewind from end of MPDU */
2532 if (status->flag & RX_FLAG_MACTIME_END)
2533 ts -= mpdu_len * 8 * 10 / rate;
2534
2535 ts += mpdu_offset * 8 * 10 / rate;
2536
2537 return ts;
2538}
164eb02d
SW		 2539
2540void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2541{
2542 struct ieee80211_sub_if_data *sdata;
d2859df5 2543 struct cfg80211_chan_def chandef;
164eb02d 2544
34a3740d 2545 mutex_lock(&local->mtx);
164eb02d
SW		 2546 mutex_lock(&local->iflist_mtx);
2547 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2548 /* it might be waiting for the local->mtx, but then
2549 * by the time it gets it, sdata->wdev.cac_started
2550 * will no longer be true
2551 */
2552 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2553
2554 if (sdata->wdev.cac_started) {
d2859df5 2555 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2556 ieee80211_vif_release_channel(sdata);
2557 cfg80211_cac_event(sdata->dev,
d2859df5 2558 &chandef,
164eb02d
SW		 2559 NL80211_RADAR_CAC_ABORTED,
2560 GFP_KERNEL);
2561 }
2562 }
2563 mutex_unlock(&local->iflist_mtx);
34a3740d 2564 mutex_unlock(&local->mtx);
164eb02d
SW		 2565}
2566
2567void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2568{
2569 struct ieee80211_local *local =
2570 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2571 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2572 struct ieee80211_chanctx *ctx;
2573 int num_chanctx = 0;
2574
2575 mutex_lock(&local->chanctx_mtx);
2576 list_for_each_entry(ctx, &local->chanctx_list, list) {
2577 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2578 continue;
2579
2580 num_chanctx++;
2581 chandef = ctx->conf.def;
2582 }
2583 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2584
2585 ieee80211_dfs_cac_cancel(local);
2586
486cf4c0
MK		 2587 if (num_chanctx > 1)
2588 /* XXX: multi-channel is not supported yet */
164eb02d 2589 WARN_ON(1);
84a3d1c9 2590 else
164eb02d 2591 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2592}
2593
2594void ieee80211_radar_detected(struct ieee80211_hw *hw)
2595{
2596 struct ieee80211_local *local = hw_to_local(hw);
2597
2598 trace_api_radar_detected(local);
2599
2600 ieee80211_queue_work(hw, &local->radar_detected_work);
2601}
2602EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2603
2604u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2605{
2606 u32 ret;
2607 int tmp;
2608
2609 switch (c->width) {
2610 case NL80211_CHAN_WIDTH_20:
2611 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2612 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2613 break;
2614 case NL80211_CHAN_WIDTH_40:
2615 c->width = NL80211_CHAN_WIDTH_20;
2616 c->center_freq1 = c->chan->center_freq;
2617 ret = IEEE80211_STA_DISABLE_40MHZ |
2618 IEEE80211_STA_DISABLE_VHT;
2619 break;
2620 case NL80211_CHAN_WIDTH_80:
2621 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2622 /* n_P40 */
2623 tmp /= 2;
2624 /* freq_P40 */
2625 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2626 c->width = NL80211_CHAN_WIDTH_40;
2627 ret = IEEE80211_STA_DISABLE_VHT;
2628 break;
2629 case NL80211_CHAN_WIDTH_80P80:
2630 c->center_freq2 = 0;
2631 c->width = NL80211_CHAN_WIDTH_80;
2632 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2633 IEEE80211_STA_DISABLE_160MHZ;
2634 break;
2635 case NL80211_CHAN_WIDTH_160:
2636 /* n_P20 */
2637 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2638 /* n_P80 */
2639 tmp /= 4;
2640 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2641 c->width = NL80211_CHAN_WIDTH_80;
2642 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2643 IEEE80211_STA_DISABLE_160MHZ;
2644 break;
2645 default:
2646 case NL80211_CHAN_WIDTH_20_NOHT:
2647 WARN_ON_ONCE(1);
2648 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2649 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2650 break;
2651 case NL80211_CHAN_WIDTH_5:
2652 case NL80211_CHAN_WIDTH_10:
2653 WARN_ON_ONCE(1);
2654 /* keep c->width */
2655 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2656 break;
2657 }
2658
2659 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2660
2661 return ret;
2662}
687da132
EG		 2663
2664/*
2665 * Returns true if smps_mode_new is strictly more restrictive than
2666 * smps_mode_old.
2667 */
2668bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2669 enum ieee80211_smps_mode smps_mode_new)
2670{
2671 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2672 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2673 return false;
2674
2675 switch (smps_mode_old) {
2676 case IEEE80211_SMPS_STATIC:
2677 return false;
2678 case IEEE80211_SMPS_DYNAMIC:
2679 return smps_mode_new == IEEE80211_SMPS_STATIC;
2680 case IEEE80211_SMPS_OFF:
2681 return smps_mode_new != IEEE80211_SMPS_OFF;
2682 default:
2683 WARN_ON(1);
2684 }
2685
2686 return false;
2687}
c6da674a
CYY		 2688
2689int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2690 struct cfg80211_csa_settings *csa_settings)
2691{
2692 struct sk_buff *skb;
2693 struct ieee80211_mgmt *mgmt;
2694 struct ieee80211_local *local = sdata->local;
2695 int freq;
2696 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2697 sizeof(mgmt->u.action.u.chan_switch);
2698 u8 *pos;
2699
2700 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2701 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2702 return -EOPNOTSUPP;
2703
2704 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2705 5 + /* channel switch announcement element */
2706 3 + /* secondary channel offset element */
2707 8); /* mesh channel switch parameters element */
2708 if (!skb)
2709 return -ENOMEM;
2710
2711 skb_reserve(skb, local->tx_headroom);
2712 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2713 memset(mgmt, 0, hdr_len);
2714 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2715 IEEE80211_STYPE_ACTION);
2716
2717 eth_broadcast_addr(mgmt->da);
2718 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2719 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2720 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2721 } else {
2722 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2723 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2724 }
2725 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2726 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2727 pos = skb_put(skb, 5);
2728 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2729 *pos++ = 3; /* IE length */
2730 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2731 freq = csa_settings->chandef.chan->center_freq;
2732 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2733 *pos++ = csa_settings->count; /* count */
2734
2735 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2736 enum nl80211_channel_type ch_type;
2737
2738 skb_put(skb, 3);
2739 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2740 *pos++ = 1; /* IE length */
2741 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2742 if (ch_type == NL80211_CHAN_HT40PLUS)
2743 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2744 else
2745 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2746 }
2747
2748 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2749 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2750
2751 skb_put(skb, 8);
2752 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2753 *pos++ = 6; /* IE length */
2754 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2755 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2756 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2757 *pos++ |= csa_settings->block_tx ?
2758 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2759 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2760 pos += 2;
ca91dc97 2761 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2762 pos += 2;
c6da674a
CYY		 2763 }
2764
2765 ieee80211_tx_skb(sdata, skb);
2766 return 0;
2767}
2475b1cc
MS		 2768
2769bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2770{
2771 return !(cs == NULL || cs->cipher == 0 ||
2772 cs->hdr_len < cs->pn_len + cs->pn_off ||
2773 cs->hdr_len <= cs->key_idx_off ||
2774 cs->key_idx_shift > 7 ||
2775 cs->key_idx_mask == 0);
2776}
2777
2778bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2779{
2780 int i;
2781
2782 /* Ensure we have enough iftype bitmap space for all iftype values */
2783 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2784
2785 for (i = 0; i < n; i++)
2786 if (!ieee80211_cs_valid(&cs[i]))
2787 return false;
2788
2789 return true;
2790}
2791
2792const struct ieee80211_cipher_scheme *
2793ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2794 enum nl80211_iftype iftype)
2795{
2796 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2797 int n = local->hw.n_cipher_schemes;
2798 int i;
2799 const struct ieee80211_cipher_scheme *cs = NULL;
2800
2801 for (i = 0; i < n; i++) {
2802 if (l[i].cipher == cipher) {
2803 cs = &l[i];
2804 break;
2805 }
2806 }
2807
2808 if (!cs || !(cs->iftype & BIT(iftype)))
2809 return NULL;
2810
2811 return cs;
2812}
2813
2814int ieee80211_cs_headroom(struct ieee80211_local *local,
2815 struct cfg80211_crypto_settings *crypto,
2816 enum nl80211_iftype iftype)
2817{
2818 const struct ieee80211_cipher_scheme *cs;
2819 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2820 int i;
2821
2822 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2823 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2824 iftype);
2825
2826 if (cs && headroom < cs->hdr_len)
2827 headroom = cs->hdr_len;
2828 }
2829
2830 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2831 if (cs && headroom < cs->hdr_len)
2832 headroom = cs->hdr_len;
2833
2834 return headroom;
2835}
a7022e65
FF		 2836
2837static bool
2838ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2839{
2840 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2841 int skip;
2842
2843 if (end > 0)
2844 return false;
2845
2846 /* End time is in the past, check for repetitions */
2847 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2848 if (data->count[i] < 255) {
2849 if (data->count[i] <= skip) {
2850 data->count[i] = 0;
2851 return false;
2852 }
2853
2854 data->count[i] -= skip;
2855 }
2856
2857 data->desc[i].start += skip * data->desc[i].interval;
2858
2859 return true;
2860}
2861
2862static bool
2863ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2864 s32 *offset)
2865{
2866 bool ret = false;
2867 int i;
2868
2869 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2870 s32 cur;
2871
2872 if (!data->count[i])
2873 continue;
2874
2875 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2876 ret = true;
2877
2878 cur = data->desc[i].start - tsf;
2879 if (cur > *offset)
2880 continue;
2881
2882 cur = data->desc[i].start + data->desc[i].duration - tsf;
2883 if (cur > *offset)
2884 *offset = cur;
2885 }
2886
2887 return ret;
2888}
2889
2890static u32
2891ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2892{
2893 s32 offset = 0;
2894 int tries = 0;
2895 /*
2896 * arbitrary limit, used to avoid infinite loops when combined NoA
2897 * descriptors cover the full time period.
2898 */
2899 int max_tries = 5;
2900
2901 ieee80211_extend_absent_time(data, tsf, &offset);
2902 do {
2903 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2904 break;
2905
2906 tries++;
2907 } while (tries < max_tries);
2908
2909 return offset;
2910}
2911
2912void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2913{
2914 u32 next_offset = BIT(31) - 1;
2915 int i;
2916
2917 data->absent = 0;
2918 data->has_next_tsf = false;
2919 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2920 s32 start;
2921
2922 if (!data->count[i])
2923 continue;
2924
2925 ieee80211_extend_noa_desc(data, tsf, i);
2926 start = data->desc[i].start - tsf;
2927 if (start <= 0)
2928 data->absent |= BIT(i);
2929
2930 if (next_offset > start)
2931 next_offset = start;
2932
2933 data->has_next_tsf = true;
2934 }
2935
2936 if (data->absent)
2937 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2938
2939 data->next_tsf = tsf + next_offset;
2940}
2941EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2942
2943int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2944 struct ieee80211_noa_data *data, u32 tsf)
2945{
2946 int ret = 0;
2947 int i;
2948
2949 memset(data, 0, sizeof(*data));
2950
2951 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2952 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2953
2954 if (!desc->count || !desc->duration)
2955 continue;
2956
2957 data->count[i] = desc->count;
2958 data->desc[i].start = le32_to_cpu(desc->start_time);
2959 data->desc[i].duration = le32_to_cpu(desc->duration);
2960 data->desc[i].interval = le32_to_cpu(desc->interval);
2961
2962 if (data->count[i] > 1 &&
2963 data->desc[i].interval < data->desc[i].duration)
2964 continue;
2965
2966 ieee80211_extend_noa_desc(data, tsf, i);
2967 ret++;
2968 }
2969
2970 if (ret)
2971 ieee80211_update_p2p_noa(data, tsf);
2972
2973 return ret;
2974}
2975EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 2976
2977void ieee80211_recalc_dtim(struct ieee80211_local *local,
2978 struct ieee80211_sub_if_data *sdata)
2979{
2980 u64 tsf = drv_get_tsf(local, sdata);
2981 u64 dtim_count = 0;
2982 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2983 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2984 struct ps_data *ps;
2985 u8 bcns_from_dtim;
2986
2987 if (tsf == -1ULL || !beacon_int || !dtim_period)
2988 return;
2989
2990 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2991 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2992 if (!sdata->bss)
2993 return;
2994
2995 ps = &sdata->bss->ps;
2996 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2997 ps = &sdata->u.mesh.ps;
2998 } else {
2999 return;
3000 }
3001
3002 /*
3003 * actually finds last dtim_count, mac80211 will update in
3004 * __beacon_add_tim().
3005 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3006 */
3007 do_div(tsf, beacon_int);
3008 bcns_from_dtim = do_div(tsf, dtim_period);
3009 /* just had a DTIM */
3010 if (!bcns_from_dtim)
3011 dtim_count = 0;
3012 else
3013 dtim_count = dtim_period - bcns_from_dtim;
3014
3015 ps->dtim_count = dtim_count;
3016}
73de86a3 3017
71e6195e
MK		 3018static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3019 struct ieee80211_chanctx *ctx)
3020{
3021 struct ieee80211_sub_if_data *sdata;
3022 u8 radar_detect = 0;
3023
3024 lockdep_assert_held(&local->chanctx_mtx);
3025
3026 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3027 return 0;
3028
3029 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3030 if (sdata->reserved_radar_required)
3031 radar_detect |= BIT(sdata->reserved_chandef.width);
3032
3033 /*
3034 * An in-place reservation context should not have any assigned vifs
3035 * until it replaces the other context.
3036 */
3037 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3038 !list_empty(&ctx->assigned_vifs));
3039
3040 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3041 if (sdata->radar_required)
3042 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3043
3044 return radar_detect;
3045}
3046
73de86a3
LC		 3047int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3048 const struct cfg80211_chan_def *chandef,
3049 enum ieee80211_chanctx_mode chanmode,
3050 u8 radar_detect)
3051{
3052 struct ieee80211_local *local = sdata->local;
3053 struct ieee80211_sub_if_data *sdata_iter;
3054 enum nl80211_iftype iftype = sdata->wdev.iftype;
3055 int num[NUM_NL80211_IFTYPES];
3056 struct ieee80211_chanctx *ctx;
b6a55015 3057 int num_different_channels = 0;
73de86a3
LC		 3058 int total = 1;
3059
3060 lockdep_assert_held(&local->chanctx_mtx);
3061
3062 if (WARN_ON(hweight32(radar_detect) > 1))
3063 return -EINVAL;
3064
b6a55015
LC		 3065 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3066 !chandef->chan))
73de86a3
LC		 3067 return -EINVAL;
3068
b6a55015
LC		 3069 if (chandef)
3070 num_different_channels = 1;
3071
73de86a3
LC		 3072 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3073 return -EINVAL;
3074
3075 /* Always allow software iftypes */
3076 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3077 if (radar_detect)
3078 return -EINVAL;
3079 return 0;
3080 }
3081
3082 memset(num, 0, sizeof(num));
3083
3084 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3085 num[iftype] = 1;
3086
3087 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3088 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3089 continue;
71e6195e 3090 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3091 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3092 num_different_channels++;
3093 continue;
3094 }
b6a55015 3095 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3096 cfg80211_chandef_compatible(chandef,
3097 &ctx->conf.def))
3098 continue;
3099 num_different_channels++;
3100 }
3101
3102 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3103 struct wireless_dev *wdev_iter;
3104
3105 wdev_iter = &sdata_iter->wdev;
3106
3107 if (sdata_iter == sdata ||
3108 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3109 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3110 continue;
3111
3112 num[wdev_iter->iftype]++;
3113 total++;
3114 }
3115
3116 if (total == 1 && !radar_detect)
3117 return 0;
3118
3119 return cfg80211_check_combinations(local->hw.wiphy,
3120 num_different_channels,
3121 radar_detect, num);
3122}
6fa001bc
MK		 3123
3124static void
3125ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3126 void *data)
3127{
3128 u32 *max_num_different_channels = data;
3129
3130 *max_num_different_channels = max(*max_num_different_channels,
3131 c->num_different_channels);
3132}
3133
3134int ieee80211_max_num_channels(struct ieee80211_local *local)
3135{
3136 struct ieee80211_sub_if_data *sdata;
3137 int num[NUM_NL80211_IFTYPES] = {};
3138 struct ieee80211_chanctx *ctx;
3139 int num_different_channels = 0;
3140 u8 radar_detect = 0;
3141 u32 max_num_different_channels = 1;
3142 int err;
3143
3144 lockdep_assert_held(&local->chanctx_mtx);
3145
3146 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3147 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3148 continue;
3149
6fa001bc
MK		 3150 num_different_channels++;
3151
71e6195e 3152 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3153 }
3154
3155 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3156 num[sdata->wdev.iftype]++;
3157
3158 err = cfg80211_iter_combinations(local->hw.wiphy,
3159 num_different_channels, radar_detect,
3160 num, ieee80211_iter_max_chans,
3161 &max_num_different_channels);
3162 if (err < 0)
3163 return err;
3164
3165 return max_num_different_channels;
3166}
40b861a0
AN		 3167
3168u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3169{
3170 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3171 *buf++ = 7; /* len */
3172 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3173 *buf++ = 0x50;
3174 *buf++ = 0xf2;
3175 *buf++ = 2; /* WME */
3176 *buf++ = 0; /* WME info */
3177 *buf++ = 1; /* WME ver */
3178 *buf++ = qosinfo; /* U-APSD no in use */
3179
3180 return buf;
3181}
Linux 6.x block layer and io_uring tree(s)