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mac80211: support beacon statistics
[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
4f9610d5
LK		 579void __ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
3b24f4c6 581 unsigned int queues, bool drop)
26da23b6 582{
26da23b6
LC		 583 if (!local->ops->flush)
584 return;
585
4f9610d5
LK		 586 /*
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
589 */
590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591 queues = ieee80211_get_vif_queues(local, sdata);
26da23b6 592
59f48fe2 593 ieee80211_stop_queues_by_reason(&local->hw, queues,
cca07b00
LC		 594 IEEE80211_QUEUE_STOP_REASON_FLUSH,
595 false);
445ea4e8 596
3b24f4c6 597 drv_flush(local, sdata, queues, drop);
445ea4e8 598
59f48fe2 599 ieee80211_wake_queues_by_reason(&local->hw, queues,
cca07b00
LC		 600 IEEE80211_QUEUE_STOP_REASON_FLUSH,
601 false);
39ecc01d
JB		 602}
603
4f9610d5 604void ieee80211_flush_queues(struct ieee80211_local *local,
3b24f4c6 605 struct ieee80211_sub_if_data *sdata, bool drop)
4f9610d5 606{
3b24f4c6 607 __ieee80211_flush_queues(local, sdata, 0, drop);
4f9610d5
LK		 608}
609
26da23b6
LC		 610void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611 struct ieee80211_sub_if_data *sdata,
612 enum queue_stop_reason reason)
613{
614 ieee80211_stop_queues_by_reason(&local->hw,
615 ieee80211_get_vif_queues(local, sdata),
616 reason, true);
617}
618
619void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata,
621 enum queue_stop_reason reason)
622{
623 ieee80211_wake_queues_by_reason(&local->hw,
624 ieee80211_get_vif_queues(local, sdata),
625 reason, true);
626}
627
c7c71066
JB		 628static void __iterate_active_interfaces(struct ieee80211_local *local,
629 u32 iter_flags,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
632 void *data)
dabeb344 633{
dabeb344
JB		 634 struct ieee80211_sub_if_data *sdata;
635
c7c71066 636 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 637 switch (sdata->vif.type) {
05c914fe 638 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 639 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
640 continue;
641 break;
05c914fe 642 case NL80211_IFTYPE_AP_VLAN:
2f561feb 643 continue;
2ca27bcf 644 default:
2f561feb
ID		 645 break;
646 }
8b2c9824
JB		 647 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
648 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
649 continue;
9607e6b6 650 if (ieee80211_sdata_running(sdata))
47846c9b 651 iterator(data, sdata->vif.addr,
2f561feb
ID		 652 &sdata->vif);
653 }
654
c7c71066
JB		 655 sdata = rcu_dereference_check(local->monitor_sdata,
656 lockdep_is_held(&local->iflist_mtx) ||
657 lockdep_rtnl_is_held());
8b2c9824
JB		 658 if (sdata &&
659 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
660 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 661 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 662}
685fb72b 663
c7c71066
JB		 664void ieee80211_iterate_active_interfaces(
665 struct ieee80211_hw *hw, u32 iter_flags,
666 void (*iterator)(void *data, u8 *mac,
667 struct ieee80211_vif *vif),
668 void *data)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 mutex_lock(&local->iflist_mtx);
673 __iterate_active_interfaces(local, iter_flags, iterator, data);
c771c9d8 674 mutex_unlock(&local->iflist_mtx);
2f561feb
ID		 675}
676EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
677
678void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 679 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 680 void (*iterator)(void *data, u8 *mac,
681 struct ieee80211_vif *vif),
682 void *data)
683{
684 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 685
e38bad47 686 rcu_read_lock();
c7c71066
JB		 687 __iterate_active_interfaces(local, iter_flags, iterator, data);
688 rcu_read_unlock();
689}
690EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 691
c7c71066
JB		 692void ieee80211_iterate_active_interfaces_rtnl(
693 struct ieee80211_hw *hw, u32 iter_flags,
694 void (*iterator)(void *data, u8 *mac,
695 struct ieee80211_vif *vif),
696 void *data)
697{
698 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 699
c7c71066 700 ASSERT_RTNL();
685fb72b 701
c7c71066 702 __iterate_active_interfaces(local, iter_flags, iterator, data);
dabeb344 703}
c7c71066 704EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 705
0fc1e049
AN		 706static void __iterate_stations(struct ieee80211_local *local,
707 void (*iterator)(void *data,
708 struct ieee80211_sta *sta),
709 void *data)
710{
711 struct sta_info *sta;
712
713 list_for_each_entry_rcu(sta, &local->sta_list, list) {
714 if (!sta->uploaded)
715 continue;
716
717 iterator(data, &sta->sta);
718 }
719}
720
721void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
722 void (*iterator)(void *data,
723 struct ieee80211_sta *sta),
724 void *data)
725{
726 struct ieee80211_local *local = hw_to_local(hw);
727
728 rcu_read_lock();
729 __iterate_stations(local, iterator, data);
730 rcu_read_unlock();
731}
732EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
733
ad7e718c
JB		 734struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
735{
736 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
737
738 if (!ieee80211_sdata_running(sdata) ||
739 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
740 return NULL;
741 return &sdata->vif;
742}
743EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
744
42935eca
LR		 745/*
746 * Nothing should have been stuffed into the workqueue during
4afaff17
EG		 747 * the suspend->resume cycle. Since we can't check each caller
748 * of this function if we are already quiescing / suspended,
749 * check here and don't WARN since this can actually happen when
750 * the rx path (for example) is racing against __ieee80211_suspend
751 * and suspending / quiescing was set after the rx path checked
752 * them.
42935eca
LR		 753 */
754static bool ieee80211_can_queue_work(struct ieee80211_local *local)
755{
4afaff17
EG		 756 if (local->quiescing || (local->suspended && !local->resuming)) {
757 pr_warn("queueing ieee80211 work while going to suspend\n");
ceb99fe0 758 return false;
4afaff17 759 }
42935eca
LR		 760
761 return true;
762}
763
764void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
765{
766 struct ieee80211_local *local = hw_to_local(hw);
767
768 if (!ieee80211_can_queue_work(local))
769 return;
770
771 queue_work(local->workqueue, work);
772}
773EXPORT_SYMBOL(ieee80211_queue_work);
774
775void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
776 struct delayed_work *dwork,
777 unsigned long delay)
778{
779 struct ieee80211_local *local = hw_to_local(hw);
780
781 if (!ieee80211_can_queue_work(local))
782 return;
783
784 queue_delayed_work(local->workqueue, dwork, delay);
785}
786EXPORT_SYMBOL(ieee80211_queue_delayed_work);
787
35d865af 788u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 789 struct ieee802_11_elems *elems,
790 u64 filter, u32 crc)
791{
792 size_t left = len;
35d865af 793 const u8 *pos = start;
dd76986b 794 bool calc_crc = filter != 0;
fcff4f10 795 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 796 const u8 *ie;
dd76986b 797
fcff4f10 798 bitmap_zero(seen_elems, 256);
dd76986b
JB		 799 memset(elems, 0, sizeof(*elems));
800 elems->ie_start = start;
801 elems->total_len = len;
802
803 while (left >= 2) {
804 u8 id, elen;
fcff4f10 805 bool elem_parse_failed;
dd76986b
JB		 806
807 id = *pos++;
808 elen = *pos++;
809 left -= 2;
810
fcff4f10
PS		 811 if (elen > left) {
812 elems->parse_error = true;
dd76986b 813 break;
fcff4f10
PS		 814 }
815
9690fb16
JB		 816 switch (id) {
817 case WLAN_EID_SSID:
818 case WLAN_EID_SUPP_RATES:
819 case WLAN_EID_FH_PARAMS:
820 case WLAN_EID_DS_PARAMS:
821 case WLAN_EID_CF_PARAMS:
822 case WLAN_EID_TIM:
823 case WLAN_EID_IBSS_PARAMS:
824 case WLAN_EID_CHALLENGE:
825 case WLAN_EID_RSN:
826 case WLAN_EID_ERP_INFO:
827 case WLAN_EID_EXT_SUPP_RATES:
828 case WLAN_EID_HT_CAPABILITY:
829 case WLAN_EID_HT_OPERATION:
830 case WLAN_EID_VHT_CAPABILITY:
831 case WLAN_EID_VHT_OPERATION:
832 case WLAN_EID_MESH_ID:
833 case WLAN_EID_MESH_CONFIG:
834 case WLAN_EID_PEER_MGMT:
835 case WLAN_EID_PREQ:
836 case WLAN_EID_PREP:
837 case WLAN_EID_PERR:
838 case WLAN_EID_RANN:
839 case WLAN_EID_CHANNEL_SWITCH:
840 case WLAN_EID_EXT_CHANSWITCH_ANN:
841 case WLAN_EID_COUNTRY:
842 case WLAN_EID_PWR_CONSTRAINT:
843 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 844 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 845 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 846 case WLAN_EID_CHAN_SWITCH_PARAM:
9041c1fa 847 case WLAN_EID_EXT_CAPABILITY:
53837584
AN		 848 case WLAN_EID_CHAN_SWITCH_TIMING:
849 case WLAN_EID_LINK_ID:
b2e506bf
JB		 850 /*
851 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
852 * that if the content gets bigger it might be needed more than once
853 */
9690fb16
JB		 854 if (test_bit(id, seen_elems)) {
855 elems->parse_error = true;
856 left -= elen;
857 pos += elen;
858 continue;
859 }
860 break;
fcff4f10 861 }
dd76986b
JB		 862
863 if (calc_crc && id < 64 && (filter & (1ULL << id)))
864 crc = crc32_be(crc, pos - 2, elen + 2);
865
fcff4f10
PS		 866 elem_parse_failed = false;
867
dd76986b 868 switch (id) {
53837584
AN		 869 case WLAN_EID_LINK_ID:
870 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
871 elem_parse_failed = true;
872 break;
873 }
874 elems->lnk_id = (void *)(pos - 2);
875 break;
876 case WLAN_EID_CHAN_SWITCH_TIMING:
877 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
878 elem_parse_failed = true;
879 break;
880 }
881 elems->ch_sw_timing = (void *)pos;
882 break;
9041c1fa
AN		 883 case WLAN_EID_EXT_CAPABILITY:
884 elems->ext_capab = pos;
885 elems->ext_capab_len = elen;
886 break;
dd76986b
JB		 887 case WLAN_EID_SSID:
888 elems->ssid = pos;
889 elems->ssid_len = elen;
890 break;
891 case WLAN_EID_SUPP_RATES:
892 elems->supp_rates = pos;
893 elems->supp_rates_len = elen;
894 break;
dd76986b 895 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 896 if (elen >= 1)
897 elems->ds_params = pos;
898 else
899 elem_parse_failed = true;
dd76986b 900 break;
dd76986b
JB		 901 case WLAN_EID_TIM:
902 if (elen >= sizeof(struct ieee80211_tim_ie)) {
903 elems->tim = (void *)pos;
904 elems->tim_len = elen;
fcff4f10
PS		 905 } else
906 elem_parse_failed = true;
dd76986b 907 break;
dd76986b
JB		 908 case WLAN_EID_CHALLENGE:
909 elems->challenge = pos;
910 elems->challenge_len = elen;
911 break;
912 case WLAN_EID_VENDOR_SPECIFIC:
913 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
914 pos[2] == 0xf2) {
915 /* Microsoft OUI (00:50:F2) */
916
917 if (calc_crc)
918 crc = crc32_be(crc, pos - 2, elen + 2);
919
441a33ba 920 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 921 /* OUI Type 2 - WMM IE */
922 if (pos[4] == 0) {
923 elems->wmm_info = pos;
924 elems->wmm_info_len = elen;
925 } else if (pos[4] == 1) {
926 elems->wmm_param = pos;
927 elems->wmm_param_len = elen;
928 }
929 }
930 }
931 break;
932 case WLAN_EID_RSN:
933 elems->rsn = pos;
934 elems->rsn_len = elen;
935 break;
936 case WLAN_EID_ERP_INFO:
1946bed9
JB		 937 if (elen >= 1)
938 elems->erp_info = pos;
939 else
940 elem_parse_failed = true;
dd76986b
JB		 941 break;
942 case WLAN_EID_EXT_SUPP_RATES:
943 elems->ext_supp_rates = pos;
944 elems->ext_supp_rates_len = elen;
945 break;
946 case WLAN_EID_HT_CAPABILITY:
947 if (elen >= sizeof(struct ieee80211_ht_cap))
948 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 949 else
950 elem_parse_failed = true;
dd76986b 951 break;
074d46d1
JB		 952 case WLAN_EID_HT_OPERATION:
953 if (elen >= sizeof(struct ieee80211_ht_operation))
954 elems->ht_operation = (void *)pos;
fcff4f10
PS		 955 else
956 elem_parse_failed = true;
dd76986b 957 break;
818255ea
MP		 958 case WLAN_EID_VHT_CAPABILITY:
959 if (elen >= sizeof(struct ieee80211_vht_cap))
960 elems->vht_cap_elem = (void *)pos;
961 else
962 elem_parse_failed = true;
963 break;
964 case WLAN_EID_VHT_OPERATION:
965 if (elen >= sizeof(struct ieee80211_vht_operation))
966 elems->vht_operation = (void *)pos;
967 else
968 elem_parse_failed = true;
969 break;
bee7f586
JB		 970 case WLAN_EID_OPMODE_NOTIF:
971 if (elen > 0)
972 elems->opmode_notif = pos;
973 else
974 elem_parse_failed = true;
975 break;
dd76986b
JB		 976 case WLAN_EID_MESH_ID:
977 elems->mesh_id = pos;
978 elems->mesh_id_len = elen;
979 break;
980 case WLAN_EID_MESH_CONFIG:
981 if (elen >= sizeof(struct ieee80211_meshconf_ie))
982 elems->mesh_config = (void *)pos;
fcff4f10
PS		 983 else
984 elem_parse_failed = true;
dd76986b
JB		 985 break;
986 case WLAN_EID_PEER_MGMT:
987 elems->peering = pos;
988 elems->peering_len = elen;
989 break;
3f52b7e3
MP		 990 case WLAN_EID_MESH_AWAKE_WINDOW:
991 if (elen >= 2)
992 elems->awake_window = (void *)pos;
993 break;
dd76986b
JB		 994 case WLAN_EID_PREQ:
995 elems->preq = pos;
996 elems->preq_len = elen;
997 break;
998 case WLAN_EID_PREP:
999 elems->prep = pos;
1000 elems->prep_len = elen;
1001 break;
1002 case WLAN_EID_PERR:
1003 elems->perr = pos;
1004 elems->perr_len = elen;
1005 break;
1006 case WLAN_EID_RANN:
1007 if (elen >= sizeof(struct ieee80211_rann_ie))
1008 elems->rann = (void *)pos;
fcff4f10
PS		 1009 else
1010 elem_parse_failed = true;
dd76986b
JB		 1011 break;
1012 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 1013 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1014 elem_parse_failed = true;
1015 break;
1016 }
1017 elems->ch_switch_ie = (void *)pos;
dd76986b 1018 break;
b4f286a1
JB		 1019 case WLAN_EID_EXT_CHANSWITCH_ANN:
1020 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1021 elem_parse_failed = true;
1022 break;
1023 }
1024 elems->ext_chansw_ie = (void *)pos;
1025 break;
85220d71
JB		 1026 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1027 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1028 elem_parse_failed = true;
1029 break;
1030 }
1031 elems->sec_chan_offs = (void *)pos;
1032 break;
8f2535b9
CYY		 1033 case WLAN_EID_CHAN_SWITCH_PARAM:
1034 if (elen !=
1035 sizeof(*elems->mesh_chansw_params_ie)) {
1036 elem_parse_failed = true;
1037 break;
1038 }
1039 elems->mesh_chansw_params_ie = (void *)pos;
1040 break;
b2e506bf
JB		 1041 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1042 if (!action ||
1043 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1044 elem_parse_failed = true;
1045 break;
1046 }
1047 elems->wide_bw_chansw_ie = (void *)pos;
1048 break;
1049 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1050 if (action) {
1051 elem_parse_failed = true;
1052 break;
1053 }
1054 /*
1055 * This is a bit tricky, but as we only care about
1056 * the wide bandwidth channel switch element, so
1057 * just parse it out manually.
1058 */
1059 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1060 pos, elen);
1061 if (ie) {
1062 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1063 elems->wide_bw_chansw_ie =
1064 (void *)(ie + 2);
1065 else
1066 elem_parse_failed = true;
1067 }
1068 break;
dd76986b
JB		 1069 case WLAN_EID_COUNTRY:
1070 elems->country_elem = pos;
1071 elems->country_elem_len = elen;
1072 break;
1073 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1074 if (elen != 1) {
1075 elem_parse_failed = true;
1076 break;
1077 }
dd76986b 1078 elems->pwr_constr_elem = pos;
dd76986b 1079 break;
c8d65917
SG		 1080 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1081 /* Lots of different options exist, but we only care
1082 * about the Dynamic Transmit Power Control element.
1083 * First check for the Cisco OUI, then for the DTPC
1084 * tag (0x00).
1085 */
1086 if (elen < 4) {
1087 elem_parse_failed = true;
1088 break;
1089 }
1090
1091 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1092 pos[2] != 0x96 || pos[3] != 0x00)
1093 break;
1094
1095 if (elen != 6) {
1096 elem_parse_failed = true;
1097 break;
1098 }
1099
1100 if (calc_crc)
1101 crc = crc32_be(crc, pos - 2, elen + 2);
1102
1103 elems->cisco_dtpc_elem = pos;
1104 break;
dd76986b 1105 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1106 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1107 elems->timeout_int = (void *)pos;
1108 else
1109 elem_parse_failed = true;
dd76986b
JB		 1110 break;
1111 default:
1112 break;
1113 }
1114
fcff4f10
PS		 1115 if (elem_parse_failed)
1116 elems->parse_error = true;
1117 else
5df45690 1118 __set_bit(id, seen_elems);
fcff4f10 1119
dd76986b
JB		 1120 left -= elen;
1121 pos += elen;
1122 }
1123
fcff4f10
PS		 1124 if (left != 0)
1125 elems->parse_error = true;
1126
dd76986b
JB		 1127 return crc;
1128}
1129
3abead59
JB		 1130void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1131 bool bss_notify)
5825fe10
JB		 1132{
1133 struct ieee80211_local *local = sdata->local;
1134 struct ieee80211_tx_queue_params qparam;
55de908a 1135 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1136 int ac;
a8ce8544 1137 bool use_11b, enable_qos;
239281f8 1138 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
aa837e1d 1139 int aCWmin, aCWmax;
5825fe10
JB		 1140
1141 if (!local->ops->conf_tx)
1142 return;
1143
54bcbc69
JB		 1144 if (local->hw.queues < IEEE80211_NUM_ACS)
1145 return;
1146
5825fe10
JB		 1147 memset(&qparam, 0, sizeof(qparam));
1148
55de908a
JB		 1149 rcu_read_lock();
1150 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1151 use_11b = (chanctx_conf &&
4bf88530 1152 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1153 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1154 rcu_read_unlock();
5825fe10 1155
a8ce8544
SG		 1156 /*
1157 * By default disable QoS in STA mode for old access points, which do
1158 * not support 802.11e. New APs will provide proper queue parameters,
1159 * that we will configure later.
1160 */
1161 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1162
239281f8
RL		 1163 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1164
1f4ffde8
FZ		 1165 /* Set defaults according to 802.11-2007 Table 7-37 */
1166 aCWmax = 1023;
1167 if (use_11b)
1168 aCWmin = 31;
1169 else
1170 aCWmin = 15;
1171
1172 /* Confiure old 802.11b/g medium access rules. */
1173 qparam.cw_max = aCWmax;
1174 qparam.cw_min = aCWmin;
1175 qparam.txop = 0;
1176 qparam.aifs = 2;
aa837e1d 1177
1f4ffde8
FZ		 1178 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1179 /* Update if QoS is enabled. */
a8ce8544
SG		 1180 if (enable_qos) {
1181 switch (ac) {
1182 case IEEE80211_AC_BK:
1183 qparam.cw_max = aCWmax;
1184 qparam.cw_min = aCWmin;
1185 qparam.txop = 0;
239281f8
RL		 1186 if (is_ocb)
1187 qparam.aifs = 9;
1188 else
1189 qparam.aifs = 7;
a8ce8544
SG		 1190 break;
1191 /* never happens but let's not leave undefined */
1192 default:
1193 case IEEE80211_AC_BE:
1194 qparam.cw_max = aCWmax;
1195 qparam.cw_min = aCWmin;
1196 qparam.txop = 0;
239281f8
RL		 1197 if (is_ocb)
1198 qparam.aifs = 6;
1199 else
1200 qparam.aifs = 3;
a8ce8544
SG		 1201 break;
1202 case IEEE80211_AC_VI:
1203 qparam.cw_max = aCWmin;
1204 qparam.cw_min = (aCWmin + 1) / 2 - 1;
239281f8
RL		 1205 if (is_ocb)
1206 qparam.txop = 0;
1207 else if (use_11b)
a8ce8544
SG		 1208 qparam.txop = 6016/32;
1209 else
1210 qparam.txop = 3008/32;
239281f8
RL		 1211
1212 if (is_ocb)
1213 qparam.aifs = 3;
1214 else
1215 qparam.aifs = 2;
a8ce8544
SG		 1216 break;
1217 case IEEE80211_AC_VO:
1218 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1219 qparam.cw_min = (aCWmin + 1) / 4 - 1;
239281f8
RL		 1220 if (is_ocb)
1221 qparam.txop = 0;
1222 else if (use_11b)
a8ce8544
SG		 1223 qparam.txop = 3264/32;
1224 else
1225 qparam.txop = 1504/32;
1226 qparam.aifs = 2;
1227 break;
1228 }
aa837e1d 1229 }
5825fe10 1230
ab13315a
KV		 1231 qparam.uapsd = false;
1232
54bcbc69
JB		 1233 sdata->tx_conf[ac] = qparam;
1234 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1235 }
e1b3ec1a 1236
f142c6b9
JB		 1237 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1238 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1239 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1240 if (bss_notify)
1241 ieee80211_bss_info_change_notify(sdata,
1242 BSS_CHANGED_QOS);
d9734979 1243 }
5825fe10 1244}
e50db65c 1245
46900298 1246void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1247 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1248 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1249 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1250 u32 tx_flags)
46900298
JB		 1251{
1252 struct ieee80211_local *local = sdata->local;
1253 struct sk_buff *skb;
1254 struct ieee80211_mgmt *mgmt;
fffd0934 1255 int err;
46900298 1256
15e230ab 1257 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1258 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1259 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1260 if (!skb)
46900298 1261 return;
d15b8459 1262
744462a9 1263 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1264
1265 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1266 memset(mgmt, 0, 24 + 6);
1267 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1268 IEEE80211_STYPE_AUTH);
efa6a09d 1269 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1270 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1271 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1272 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1273 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1274 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1275 if (extra)
1276 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1277
fffd0934
JB		 1278 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1279 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1280 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1281 WARN_ON(err);
1282 }
1283
1672c0e3
JB		 1284 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1285 tx_flags;
62ae67be 1286 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1287}
1288
6ae16775
AQ		 1289void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1290 const u8 *bssid, u16 stype, u16 reason,
1291 bool send_frame, u8 *frame_buf)
1292{
1293 struct ieee80211_local *local = sdata->local;
1294 struct sk_buff *skb;
1295 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1296
1297 /* build frame */
1298 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1299 mgmt->duration = 0; /* initialize only */
1300 mgmt->seq_ctrl = 0; /* initialize only */
1301 memcpy(mgmt->da, bssid, ETH_ALEN);
1302 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1303 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1304 /* u.deauth.reason_code == u.disassoc.reason_code */
1305 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1306
1307 if (send_frame) {
1308 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1309 IEEE80211_DEAUTH_FRAME_LEN);
1310 if (!skb)
1311 return;
1312
1313 skb_reserve(skb, local->hw.extra_tx_headroom);
1314
1315 /* copy in frame */
1316 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1317 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1318
1319 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1320 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1321 IEEE80211_SKB_CB(skb)->flags |=
1322 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1323
1324 ieee80211_tx_skb(sdata, skb);
1325 }
1326}
1327
c56ef672
DS		 1328static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1329 u8 *buffer, size_t buffer_len,
1330 const u8 *ie, size_t ie_len,
1331 enum ieee80211_band band,
1332 u32 rate_mask,
1333 struct cfg80211_chan_def *chandef,
1334 size_t *offset)
de95a54b
JB		 1335{
1336 struct ieee80211_supported_band *sband;
c604b9f2 1337 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1338 size_t noffset;
8e664fb3 1339 int supp_rates_len, i;
8dcb2003
JM		 1340 u8 rates[32];
1341 int num_rates;
1342 int ext_rates_len;
2103dec1
SW		 1343 int shift;
1344 u32 rate_flags;
40a11ca8 1345 bool have_80mhz = false;
de95a54b 1346
c56ef672
DS		 1347 *offset = 0;
1348
4d36ec58 1349 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1350 if (WARN_ON_ONCE(!sband))
1351 return 0;
de95a54b 1352
2103dec1
SW		 1353 rate_flags = ieee80211_chandef_rate_flags(chandef);
1354 shift = ieee80211_chandef_get_shift(chandef);
1355
8dcb2003
JM		 1356 num_rates = 0;
1357 for (i = 0; i < sband->n_bitrates; i++) {
1358 if ((BIT(i) & rate_mask) == 0)
1359 continue; /* skip rate */
2103dec1
SW		 1360 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1361 continue;
1362
1363 rates[num_rates++] =
1364 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1365 (1 << shift) * 5);
8dcb2003
JM		 1366 }
1367
1368 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1369
c604b9f2
JB		 1370 if (end - pos < 2 + supp_rates_len)
1371 goto out_err;
de95a54b 1372 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1373 *pos++ = supp_rates_len;
8dcb2003
JM		 1374 memcpy(pos, rates, supp_rates_len);
1375 pos += supp_rates_len;
8e664fb3
JB		 1376
1377 /* insert "request information" if in custom IEs */
1378 if (ie && ie_len) {
1379 static const u8 before_extrates[] = {
1380 WLAN_EID_SSID,
1381 WLAN_EID_SUPP_RATES,
1382 WLAN_EID_REQUEST,
1383 };
1384 noffset = ieee80211_ie_split(ie, ie_len,
1385 before_extrates,
1386 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1387 *offset);
1388 if (end - pos < noffset - *offset)
c604b9f2 1389 goto out_err;
c56ef672
DS		 1390 memcpy(pos, ie + *offset, noffset - *offset);
1391 pos += noffset - *offset;
1392 *offset = noffset;
8e664fb3
JB		 1393 }
1394
8dcb2003
JM		 1395 ext_rates_len = num_rates - supp_rates_len;
1396 if (ext_rates_len > 0) {
c604b9f2
JB		 1397 if (end - pos < 2 + ext_rates_len)
1398 goto out_err;
8e664fb3 1399 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1400 *pos++ = ext_rates_len;
1401 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1402 pos += ext_rates_len;
8e664fb3
JB		 1403 }
1404
2103dec1 1405 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1406 if (end - pos < 3)
1407 goto out_err;
651b5225
JM		 1408 *pos++ = WLAN_EID_DS_PARAMS;
1409 *pos++ = 1;
2103dec1
SW		 1410 *pos++ = ieee80211_frequency_to_channel(
1411 chandef->chan->center_freq);
651b5225
JM		 1412 }
1413
8e664fb3
JB		 1414 /* insert custom IEs that go before HT */
1415 if (ie && ie_len) {
1416 static const u8 before_ht[] = {
1417 WLAN_EID_SSID,
1418 WLAN_EID_SUPP_RATES,
1419 WLAN_EID_REQUEST,
1420 WLAN_EID_EXT_SUPP_RATES,
1421 WLAN_EID_DS_PARAMS,
1422 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1423 };
1424 noffset = ieee80211_ie_split(ie, ie_len,
1425 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1426 *offset);
1427 if (end - pos < noffset - *offset)
c604b9f2 1428 goto out_err;
c56ef672
DS		 1429 memcpy(pos, ie + *offset, noffset - *offset);
1430 pos += noffset - *offset;
1431 *offset = noffset;
de95a54b
JB		 1432 }
1433
c604b9f2
JB		 1434 if (sband->ht_cap.ht_supported) {
1435 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1436 goto out_err;
ef96a842
BG		 1437 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1438 sband->ht_cap.cap);
c604b9f2 1439 }
5ef2d41a 1440
de95a54b
JB		 1441 /*
1442 * If adding more here, adjust code in main.c
1443 * that calculates local->scan_ies_len.
1444 */
1445
4d952300 1446 /* insert custom IEs that go before VHT */
8e664fb3 1447 if (ie && ie_len) {
4d952300
JB		 1448 static const u8 before_vht[] = {
1449 WLAN_EID_SSID,
1450 WLAN_EID_SUPP_RATES,
1451 WLAN_EID_REQUEST,
1452 WLAN_EID_EXT_SUPP_RATES,
1453 WLAN_EID_DS_PARAMS,
1454 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1455 WLAN_EID_HT_CAPABILITY,
1456 WLAN_EID_BSS_COEX_2040,
1457 WLAN_EID_EXT_CAPABILITY,
1458 WLAN_EID_SSID_LIST,
1459 WLAN_EID_CHANNEL_USAGE,
1460 WLAN_EID_INTERWORKING,
1461 /* mesh ID can't happen here */
1462 /* 60 GHz can't happen here right now */
1463 };
1464 noffset = ieee80211_ie_split(ie, ie_len,
1465 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1466 *offset);
1467 if (end - pos < noffset - *offset)
c604b9f2 1468 goto out_err;
c56ef672
DS		 1469 memcpy(pos, ie + *offset, noffset - *offset);
1470 pos += noffset - *offset;
1471 *offset = noffset;
de95a54b
JB		 1472 }
1473
40a11ca8
JB		 1474 /* Check if any channel in this sband supports at least 80 MHz */
1475 for (i = 0; i < sband->n_channels; i++) {
fa44b988
AN		 1476 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1477 IEEE80211_CHAN_NO_80MHZ))
1478 continue;
1479
1480 have_80mhz = true;
1481 break;
40a11ca8
JB		 1482 }
1483
1484 if (sband->vht_cap.vht_supported && have_80mhz) {
c604b9f2
JB		 1485 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1486 goto out_err;
ba0afa2f
MP		 1487 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1488 sband->vht_cap.cap);
c604b9f2 1489 }
ba0afa2f 1490
c604b9f2
JB		 1491 return pos - buffer;
1492 out_err:
1493 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1494 return pos - buffer;
1495}
1496
c56ef672
DS		 1497int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1498 size_t buffer_len,
1499 struct ieee80211_scan_ies *ie_desc,
1500 const u8 *ie, size_t ie_len,
1501 u8 bands_used, u32 *rate_masks,
1502 struct cfg80211_chan_def *chandef)
1503{
1504 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1505 int i;
1506
1507 memset(ie_desc, 0, sizeof(*ie_desc));
1508
1509 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1510 if (bands_used & BIT(i)) {
1511 pos += ieee80211_build_preq_ies_band(local,
1512 buffer + pos,
1513 buffer_len - pos,
1514 ie, ie_len, i,
1515 rate_masks[i],
1516 chandef,
1517 &custom_ie_offset);
1518 ie_desc->ies[i] = buffer + old_pos;
1519 ie_desc->len[i] = pos - old_pos;
1520 old_pos = pos;
1521 }
1522 }
1523
1524 /* add any remaining custom IEs */
1525 if (ie && ie_len) {
1526 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1527 "not enough space for preq custom IEs\n"))
1528 return pos;
1529 memcpy(buffer + pos, ie + custom_ie_offset,
1530 ie_len - custom_ie_offset);
1531 ie_desc->common_ies = buffer + pos;
1532 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1533 pos += ie_len - custom_ie_offset;
1534 }
1535
1536 return pos;
1537};
1538
a619a4c0 1539struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
a344d677
JB		 1540 const u8 *src, const u8 *dst,
1541 u32 ratemask,
6b77863b 1542 struct ieee80211_channel *chan,
a619a4c0 1543 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1544 const u8 *ie, size_t ie_len,
1545 bool directed)
46900298
JB		 1546{
1547 struct ieee80211_local *local = sdata->local;
2103dec1 1548 struct cfg80211_chan_def chandef;
46900298
JB		 1549 struct sk_buff *skb;
1550 struct ieee80211_mgmt *mgmt;
b9a9ada1 1551 int ies_len;
c56ef672
DS		 1552 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1553 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1554
a806c558
PS		 1555 /*
1556 * Do not send DS Channel parameter for directed probe requests
1557 * in order to maximize the chance that we get a response. Some
1558 * badly-behaved APs don't respond when this parameter is included.
1559 */
2103dec1 1560 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1561 if (directed)
2103dec1 1562 chandef.chan = NULL;
a806c558 1563 else
2103dec1 1564 chandef.chan = chan;
651b5225 1565
a344d677
JB		 1566 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1567 100 + ie_len);
5b2bbf75 1568 if (!skb)
b9a9ada1
JB		 1569 return NULL;
1570
c56ef672 1571 rate_masks[chan->band] = ratemask;
b9a9ada1 1572 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1573 skb_tailroom(skb), &dummy_ie_desc,
1574 ie, ie_len, BIT(chan->band),
1575 rate_masks, &chandef);
b9a9ada1 1576 skb_put(skb, ies_len);
7c12ce8b 1577
46900298 1578 if (dst) {
7c12ce8b 1579 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1580 memcpy(mgmt->da, dst, ETH_ALEN);
1581 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1582 }
46900298 1583
62ae67be 1584 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1585
a619a4c0
JO		 1586 return skb;
1587}
1588
a344d677
JB		 1589void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1590 const u8 *src, const u8 *dst,
a619a4c0 1591 const u8 *ssid, size_t ssid_len,
a806c558 1592 const u8 *ie, size_t ie_len,
1672c0e3 1593 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1594 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1595{
1596 struct sk_buff *skb;
1597
a344d677 1598 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
6b77863b 1599 ssid, ssid_len,
85a237fe 1600 ie, ie_len, directed);
aad14ceb 1601 if (skb) {
1672c0e3 1602 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1603 if (scan)
1604 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1605 else
1606 ieee80211_tx_skb(sdata, skb);
aad14ceb 1607 }
46900298
JB		 1608}
1609
2103dec1 1610u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1611 struct ieee802_11_elems *elems,
9ebb61a2 1612 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1613{
1614 struct ieee80211_supported_band *sband;
46900298 1615 size_t num_rates;
2103dec1
SW		 1616 u32 supp_rates, rate_flags;
1617 int i, j, shift;
1618 sband = sdata->local->hw.wiphy->bands[band];
1619
1620 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1621 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1622
4ee73f33
MK		 1623 if (WARN_ON(!sband))
1624 return 1;
46900298 1625
46900298
JB		 1626 num_rates = sband->n_bitrates;
1627 supp_rates = 0;
1628 for (i = 0; i < elems->supp_rates_len +
1629 elems->ext_supp_rates_len; i++) {
1630 u8 rate = 0;
1631 int own_rate;
9ebb61a2 1632 bool is_basic;
46900298
JB		 1633 if (i < elems->supp_rates_len)
1634 rate = elems->supp_rates[i];
1635 else if (elems->ext_supp_rates)
1636 rate = elems->ext_supp_rates
1637 [i - elems->supp_rates_len];
1638 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1639 is_basic = !!(rate & 0x80);
1640
1641 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1642 continue;
1643
1644 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1645 int brate;
1646 if ((rate_flags & sband->bitrates[j].flags)
1647 != rate_flags)
1648 continue;
1649
1650 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1651 1 << shift);
1652
1653 if (brate == own_rate) {
46900298 1654 supp_rates |= BIT(j);
9ebb61a2
AN		 1655 if (basic_rates && is_basic)
1656 *basic_rates |= BIT(j);
1657 }
1658 }
46900298
JB		 1659 }
1660 return supp_rates;
1661}
f2753ddb 1662
84f6a01c
JB		 1663void ieee80211_stop_device(struct ieee80211_local *local)
1664{
1665 ieee80211_led_radio(local, false);
67408c8c 1666 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1667
1668 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1669
1670 flush_workqueue(local->workqueue);
678f415f 1671 drv_stop(local);
84f6a01c
JB		 1672}
1673
f6837ba8
JB		 1674static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1675{
1676 struct ieee80211_sub_if_data *sdata;
1677 struct ieee80211_chanctx *ctx;
1678
1679 /*
1680 * We get here if during resume the device can't be restarted properly.
1681 * We might also get here if this happens during HW reset, which is a
1682 * slightly different situation and we need to drop all connections in
1683 * the latter case.
1684 *
1685 * Ask cfg80211 to turn off all interfaces, this will result in more
1686 * warnings but at least we'll then get into a clean stopped state.
1687 */
1688
1689 local->resuming = false;
1690 local->suspended = false;
1691 local->started = false;
1692
1693 /* scheduled scan clearly can't be running any more, but tell
1694 * cfg80211 and clear local state
1695 */
1696 ieee80211_sched_scan_end(local);
1697
1698 list_for_each_entry(sdata, &local->interfaces, list)
1699 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1700
1701 /* Mark channel contexts as not being in the driver any more to avoid
1702 * removing them from the driver during the shutdown process...
1703 */
1704 mutex_lock(&local->chanctx_mtx);
1705 list_for_each_entry(ctx, &local->chanctx_list, list)
1706 ctx->driver_present = false;
1707 mutex_unlock(&local->chanctx_mtx);
1708
1709 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1710}
1711
153a5fc4
SG		 1712static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1713 struct ieee80211_sub_if_data *sdata)
1714{
1715 struct ieee80211_chanctx_conf *conf;
1716 struct ieee80211_chanctx *ctx;
1717
1718 if (!local->use_chanctx)
1719 return;
1720
1721 mutex_lock(&local->chanctx_mtx);
1722 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1723 lockdep_is_held(&local->chanctx_mtx));
1724 if (conf) {
1725 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1726 drv_assign_vif_chanctx(local, sdata, ctx);
1727 }
1728 mutex_unlock(&local->chanctx_mtx);
1729}
1730
f2753ddb
JB		 1731int ieee80211_reconfig(struct ieee80211_local *local)
1732{
1733 struct ieee80211_hw *hw = &local->hw;
1734 struct ieee80211_sub_if_data *sdata;
55de908a 1735 struct ieee80211_chanctx *ctx;
f2753ddb 1736 struct sta_info *sta;
2683d65b 1737 int res, i;
d888130a 1738 bool reconfig_due_to_wowlan = false;
d43c6b6e 1739 struct ieee80211_sub_if_data *sched_scan_sdata;
6ea0a69c 1740 struct cfg80211_sched_scan_request *sched_scan_req;
d43c6b6e 1741 bool sched_scan_stopped = false;
d888130a 1742
0f8b8245
EP		 1743 /* nothing to do if HW shouldn't run */
1744 if (!local->open_count)
1745 goto wake_up;
1746
8f21b0ad 1747#ifdef CONFIG_PM
ceb99fe0
JB		 1748 if (local->suspended)
1749 local->resuming = true;
f2753ddb 1750
eecc4800 1751 if (local->wowlan) {
eecc4800 1752 res = drv_resume(local);
27b3eb9c 1753 local->wowlan = false;
eecc4800
JB		 1754 if (res < 0) {
1755 local->resuming = false;
1756 return res;
1757 }
1758 if (res == 0)
1759 goto wake_up;
1760 WARN_ON(res > 1);
1761 /*
1762 * res is 1, which means the driver requested
1763 * to go through a regular reset on wakeup.
1764 */
d888130a 1765 reconfig_due_to_wowlan = true;
eecc4800
JB		 1766 }
1767#endif
f2753ddb 1768
94f9b97b
JB		 1769 /*
1770 * Upon resume hardware can sometimes be goofy due to
1771 * various platform / driver / bus issues, so restarting
1772 * the device may at times not work immediately. Propagate
1773 * the error.
1774 */
1775 res = drv_start(local);
1776 if (res) {
f6837ba8
JB		 1777 if (local->suspended)
1778 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1779 else
1780 WARN(1, "Hardware became unavailable during restart.\n");
1781 ieee80211_handle_reconfig_failure(local);
94f9b97b 1782 return res;
f2753ddb
JB		 1783 }
1784
7f281975
YAP		 1785 /* setup fragmentation threshold */
1786 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1787
1788 /* setup RTS threshold */
1789 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1790
1791 /* reset coverage class */
1792 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1793
94f9b97b
JB		 1794 ieee80211_led_radio(local, true);
1795 ieee80211_mod_tpt_led_trig(local,
1796 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1797
f2753ddb 1798 /* add interfaces */
4b6f1dd6
JB		 1799 sdata = rtnl_dereference(local->monitor_sdata);
1800 if (sdata) {
3c3e21e7
JB		 1801 /* in HW restart it exists already */
1802 WARN_ON(local->resuming);
4b6f1dd6
JB		 1803 res = drv_add_interface(local, sdata);
1804 if (WARN_ON(res)) {
0c2bef46 1805 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1806 synchronize_net();
1807 kfree(sdata);
1808 }
1809 }
1810
f2753ddb
JB		 1811 list_for_each_entry(sdata, &local->interfaces, list) {
1812 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1813 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1814 ieee80211_sdata_running(sdata))
7b7eab6f 1815 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1816 }
1817
55de908a 1818 /* add channel contexts */
f0dea9c7
AS		 1819 if (local->use_chanctx) {
1820 mutex_lock(&local->chanctx_mtx);
1821 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1822 if (ctx->replace_state !=
1823 IEEE80211_CHANCTX_REPLACES_OTHER)
1824 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1825 mutex_unlock(&local->chanctx_mtx);
55de908a 1826
7df180f7
ZG		 1827 list_for_each_entry(sdata, &local->interfaces, list) {
1828 if (!ieee80211_sdata_running(sdata))
1829 continue;
1830 ieee80211_assign_chanctx(local, sdata);
1831 }
6352c87f 1832
7df180f7
ZG		 1833 sdata = rtnl_dereference(local->monitor_sdata);
1834 if (sdata && ieee80211_sdata_running(sdata))
1835 ieee80211_assign_chanctx(local, sdata);
1836 }
fe5f2559 1837
f2753ddb 1838 /* add STAs back */
34e89507
JB		 1839 mutex_lock(&local->sta_mtx);
1840 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1841 enum ieee80211_sta_state state;
f09603a2 1842
2e8d397e
AN		 1843 if (!sta->uploaded)
1844 continue;
1845
1846 /* AP-mode stations will be added later */
1847 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1848 continue;
1849
1850 for (state = IEEE80211_STA_NOTEXIST;
1851 state < sta->sta_state; state++)
1852 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1853 state + 1));
f2753ddb 1854 }
34e89507 1855 mutex_unlock(&local->sta_mtx);
f2753ddb 1856
2683d65b 1857 /* reconfigure tx conf */
54bcbc69
JB		 1858 if (hw->queues >= IEEE80211_NUM_ACS) {
1859 list_for_each_entry(sdata, &local->interfaces, list) {
1860 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1861 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1862 !ieee80211_sdata_running(sdata))
1863 continue;
f6f3def3 1864
54bcbc69
JB		 1865 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1866 drv_conf_tx(local, sdata, i,
1867 &sdata->tx_conf[i]);
1868 }
f6f3def3 1869 }
2683d65b 1870
f2753ddb
JB		 1871 /* reconfigure hardware */
1872 ieee80211_hw_config(local, ~0);
1873
f2753ddb 1874 ieee80211_configure_filter(local);
f2753ddb
JB		 1875
1876 /* Finally also reconfigure all the BSS information */
1877 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1878 u32 changed;
1879
9607e6b6 1880 if (!ieee80211_sdata_running(sdata))
f2753ddb 1881 continue;
ac8dd506
JB		 1882
1883 /* common change flags for all interface types */
1884 changed = BSS_CHANGED_ERP_CTS_PROT |
1885 BSS_CHANGED_ERP_PREAMBLE |
1886 BSS_CHANGED_ERP_SLOT |
1887 BSS_CHANGED_HT |
1888 BSS_CHANGED_BASIC_RATES |
1889 BSS_CHANGED_BEACON_INT |
1890 BSS_CHANGED_BSSID |
4ced3f74 1891 BSS_CHANGED_CQM |
55de47f6 1892 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1893 BSS_CHANGED_IDLE |
1894 BSS_CHANGED_TXPOWER;
ac8dd506 1895
f2753ddb
JB		 1896 switch (sdata->vif.type) {
1897 case NL80211_IFTYPE_STATION:
0d392e93 1898 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1899 BSS_CHANGED_ARP_FILTER |
1900 BSS_CHANGED_PS;
c65dd147 1901
989c6505
AB		 1902 /* Re-send beacon info report to the driver */
1903 if (sdata->u.mgd.have_beacon)
1904 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1905
8d61ffa5 1906 sdata_lock(sdata);
ac8dd506 1907 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1908 sdata_unlock(sdata);
ac8dd506 1909 break;
6e0bd6c3 1910 case NL80211_IFTYPE_OCB:
239281f8
RL		 1911 changed |= BSS_CHANGED_OCB;
1912 ieee80211_bss_info_change_notify(sdata, changed);
6e0bd6c3 1913 break;
f2753ddb 1914 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1915 changed |= BSS_CHANGED_IBSS;
1916 /* fall through */
f2753ddb 1917 case NL80211_IFTYPE_AP:
339afbf4 1918 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1919
1041638f 1920 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1921 changed |= BSS_CHANGED_AP_PROBE_RESP;
1922
1041638f
JB		 1923 if (rcu_access_pointer(sdata->u.ap.beacon))
1924 drv_start_ap(local, sdata);
1925 }
1926
7827493b 1927 /* fall through */
f2753ddb 1928 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1929 if (sdata->vif.bss_conf.enable_beacon) {
1930 changed |= BSS_CHANGED_BEACON |
1931 BSS_CHANGED_BEACON_ENABLED;
1932 ieee80211_bss_info_change_notify(sdata, changed);
1933 }
f2753ddb
JB		 1934 break;
1935 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1936 case NL80211_IFTYPE_AP_VLAN:
1937 case NL80211_IFTYPE_MONITOR:
98104fde 1938 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1939 /* nothing to do */
f142c6b9 1940 break;
f2753ddb 1941 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1942 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1943 case NL80211_IFTYPE_P2P_CLIENT:
1944 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1945 WARN_ON(1);
1946 break;
1947 }
1948 }
1949
8e1b23b9
ES		 1950 ieee80211_recalc_ps(local, -1);
1951
6e1b1b24
EP		 1952 /*
1953 * The sta might be in psm against the ap (e.g. because
1954 * this was the state before a hw restart), so we
1955 * explicitly send a null packet in order to make sure
1956 * it'll sync against the ap (and get out of psm).
1957 */
1958 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1959 list_for_each_entry(sdata, &local->interfaces, list) {
1960 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1961 continue;
20f544ee
JB		 1962 if (!sdata->u.mgd.associated)
1963 continue;
6e1b1b24
EP		 1964
1965 ieee80211_send_nullfunc(local, sdata, 0);
1966 }
1967 }
1968
2e8d397e
AN		 1969 /* APs are now beaconing, add back stations */
1970 mutex_lock(&local->sta_mtx);
1971 list_for_each_entry(sta, &local->sta_list, list) {
1972 enum ieee80211_sta_state state;
1973
1974 if (!sta->uploaded)
1975 continue;
1976
1977 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1978 continue;
1979
1980 for (state = IEEE80211_STA_NOTEXIST;
1981 state < sta->sta_state; state++)
1982 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1983 state + 1));
1984 }
1985 mutex_unlock(&local->sta_mtx);
1986
7b21aea0
ES		 1987 /* add back keys */
1988 list_for_each_entry(sdata, &local->interfaces, list)
1989 if (ieee80211_sdata_running(sdata))
1990 ieee80211_enable_keys(sdata);
1991
c6209488 1992 wake_up:
04800ada
AN		 1993 local->in_reconfig = false;
1994 barrier();
1995
3c3e21e7
JB		 1996 if (local->monitors == local->open_count && local->monitors > 0)
1997 ieee80211_add_virtual_monitor(local);
1998
2a419056
JB		 1999 /*
2000 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2001 * sessions can be established after a resume.
2002 *
2003 * Also tear down aggregation sessions since reconfiguring
2004 * them in a hardware restart scenario is not easily done
2005 * right now, and the hardware will have lost information
2006 * about the sessions, but we and the AP still think they
2007 * are active. This is really a workaround though.
2008 */
74e2bd1f 2009 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 2010 mutex_lock(&local->sta_mtx);
2011
2012 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 2013 ieee80211_sta_tear_down_BA_sessions(
2014 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 2015 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 2016 }
2a419056
JB		 2017
2018 mutex_unlock(&local->sta_mtx);
74e2bd1f 2019 }
74e2bd1f 2020
445ea4e8 2021 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 2022 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2023 false);
f2753ddb 2024
32769814
AN		 2025 /*
2026 * Reconfigure sched scan if it was interrupted by FW restart or
2027 * suspend.
2028 */
2029 mutex_lock(&local->mtx);
2030 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2031 lockdep_is_held(&local->mtx));
6ea0a69c
JB		 2032 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2033 lockdep_is_held(&local->mtx));
2034 if (sched_scan_sdata && sched_scan_req)
32769814
AN		 2035 /*
2036 * Sched scan stopped, but we don't want to report it. Instead,
2037 * we're trying to reschedule.
2038 */
2039 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
6ea0a69c 2040 sched_scan_req))
32769814
AN		 2041 sched_scan_stopped = true;
2042 mutex_unlock(&local->mtx);
2043
2044 if (sched_scan_stopped)
e669ba2d 2045 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 2046
5bb644a0
JB		 2047 /*
2048 * If this is for hw restart things are still running.
2049 * We may want to change that later, however.
2050 */
0f8b8245 2051 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
cf2c92d8 2052 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
8f21b0ad
JB		 2053
2054 if (!local->suspended)
5bb644a0
JB		 2055 return 0;
2056
2057#ifdef CONFIG_PM
ceb99fe0 2058 /* first set suspended false, then resuming */
5bb644a0 2059 local->suspended = false;
ceb99fe0
JB		 2060 mb();
2061 local->resuming = false;
5bb644a0 2062
0f8b8245 2063 if (local->open_count && !reconfig_due_to_wowlan)
cf2c92d8
EP		 2064 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2065
b8360ab8
JB		 2066 list_for_each_entry(sdata, &local->interfaces, list) {
2067 if (!ieee80211_sdata_running(sdata))
2068 continue;
2069 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2070 ieee80211_sta_restart(sdata);
2071 }
2072
26d59535 2073 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 2074#else
2075 WARN_ON(1);
2076#endif
d43c6b6e 2077
f2753ddb
JB		 2078 return 0;
2079}
42935eca 2080
95acac61
JB		 2081void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2082{
2083 struct ieee80211_sub_if_data *sdata;
2084 struct ieee80211_local *local;
2085 struct ieee80211_key *key;
2086
2087 if (WARN_ON(!vif))
2088 return;
2089
2090 sdata = vif_to_sdata(vif);
2091 local = sdata->local;
2092
2093 if (WARN_ON(!local->resuming))
2094 return;
2095
2096 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2097 return;
2098
2099 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2100
2101 mutex_lock(&local->key_mtx);
2102 list_for_each_entry(key, &sdata->key_list, list)
2103 key->flags |= KEY_FLAG_TAINTED;
2104 mutex_unlock(&local->key_mtx);
2105}
2106EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2107
04ecd257 2108void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2109{
04ecd257
JB		 2110 struct ieee80211_local *local = sdata->local;
2111 struct ieee80211_chanctx_conf *chanctx_conf;
2112 struct ieee80211_chanctx *chanctx;
025e6be2 2113
04ecd257 2114 mutex_lock(&local->chanctx_mtx);
0f78231b 2115
04ecd257
JB		 2116 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2117 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2118
04ecd257 2119 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2120 goto unlock;
0f78231b 2121
04ecd257
JB		 2122 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2123 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2124 unlock:
04ecd257 2125 mutex_unlock(&local->chanctx_mtx);
0f78231b 2126}
8e664fb3 2127
21f659bf
EP		 2128void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2129{
2130 struct ieee80211_local *local = sdata->local;
2131 struct ieee80211_chanctx_conf *chanctx_conf;
2132 struct ieee80211_chanctx *chanctx;
2133
2134 mutex_lock(&local->chanctx_mtx);
2135
2136 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2137 lockdep_is_held(&local->chanctx_mtx));
2138
2139 if (WARN_ON_ONCE(!chanctx_conf))
2140 goto unlock;
2141
2142 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2143 ieee80211_recalc_chanctx_min_def(local, chanctx);
2144 unlock:
2145 mutex_unlock(&local->chanctx_mtx);
2146}
2147
8e664fb3
JB		 2148static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2149{
2150 int i;
2151
2152 for (i = 0; i < n_ids; i++)
2153 if (ids[i] == id)
2154 return true;
2155 return false;
2156}
2157
8ed28747
JB		 2158size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2159 const u8 *ids, int n_ids,
2160 const u8 *after_ric, int n_after_ric,
2161 size_t offset)
8e664fb3
JB		 2162{
2163 size_t pos = offset;
2164
8ed28747
JB		 2165 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2166 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2167 pos += 2 + ies[pos + 1];
2168
2169 while (pos < ielen &&
2170 !ieee80211_id_in_list(after_ric, n_after_ric,
2171 ies[pos]))
2172 pos += 2 + ies[pos + 1];
2173 } else {
2174 pos += 2 + ies[pos + 1];
2175 }
2176 }
8e664fb3
JB		 2177
2178 return pos;
2179}
8ed28747
JB		 2180
2181size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2182 const u8 *ids, int n_ids, size_t offset)
2183{
2184 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2185}
a7f3a768 2186EXPORT_SYMBOL(ieee80211_ie_split);
8e664fb3
JB		 2187
2188size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2189{
2190 size_t pos = offset;
2191
2192 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2193 pos += 2 + ies[pos + 1];
2194
2195 return pos;
2196}
615f7b9b
MV		 2197
2198static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2199 int rssi_min_thold,
2200 int rssi_max_thold)
2201{
2202 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2203
2204 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2205 return;
2206
2207 /*
2208 * Scale up threshold values before storing it, as the RSSI averaging
2209 * algorithm uses a scaled up value as well. Change this scaling
2210 * factor if the RSSI averaging algorithm changes.
2211 */
2212 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2213 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2214}
2215
2216void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2217 int rssi_min_thold,
2218 int rssi_max_thold)
2219{
2220 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2221
2222 WARN_ON(rssi_min_thold == rssi_max_thold ||
2223 rssi_min_thold > rssi_max_thold);
2224
2225 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2226 rssi_max_thold);
2227}
2228EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2229
2230void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2231{
2232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2233
2234 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2235}
2236EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2237
ef96a842 2238u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2239 u16 cap)
2240{
2241 __le16 tmp;
2242
2243 *pos++ = WLAN_EID_HT_CAPABILITY;
2244 *pos++ = sizeof(struct ieee80211_ht_cap);
2245 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2246
2247 /* capability flags */
2248 tmp = cpu_to_le16(cap);
2249 memcpy(pos, &tmp, sizeof(u16));
2250 pos += sizeof(u16);
2251
2252 /* AMPDU parameters */
ef96a842
BG		 2253 *pos++ = ht_cap->ampdu_factor |
2254 (ht_cap->ampdu_density <<
42e7aa77
AS		 2255 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2256
2257 /* MCS set */
ef96a842
BG		 2258 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2259 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2260
2261 /* extended capabilities */
2262 pos += sizeof(__le16);
2263
2264 /* BF capabilities */
2265 pos += sizeof(__le32);
2266
2267 /* antenna selection */
2268 pos += sizeof(u8);
2269
2270 return pos;
2271}
2272
ba0afa2f 2273u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2274 u32 cap)
ba0afa2f
MP		 2275{
2276 __le32 tmp;
2277
2278 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2279 *pos++ = sizeof(struct ieee80211_vht_cap);
2280 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2281
2282 /* capability flags */
2283 tmp = cpu_to_le32(cap);
2284 memcpy(pos, &tmp, sizeof(u32));
2285 pos += sizeof(u32);
2286
2287 /* VHT MCS set */
2288 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2289 pos += sizeof(vht_cap->vht_mcs);
2290
2291 return pos;
2292}
2293
074d46d1 2294u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2295 const struct cfg80211_chan_def *chandef,
431e3154 2296 u16 prot_mode)
42e7aa77 2297{
074d46d1 2298 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2299 /* Build HT Information */
074d46d1
JB		 2300 *pos++ = WLAN_EID_HT_OPERATION;
2301 *pos++ = sizeof(struct ieee80211_ht_operation);
2302 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2303 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2304 chandef->chan->center_freq);
2305 switch (chandef->width) {
2306 case NL80211_CHAN_WIDTH_160:
2307 case NL80211_CHAN_WIDTH_80P80:
2308 case NL80211_CHAN_WIDTH_80:
2309 case NL80211_CHAN_WIDTH_40:
2310 if (chandef->center_freq1 > chandef->chan->center_freq)
2311 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2312 else
2313 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2314 break;
42e7aa77 2315 default:
074d46d1 2316 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2317 break;
2318 }
aee286c2 2319 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2320 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2321 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2322 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2323
431e3154 2324 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2325 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2326
2327 /* It seems that Basic MCS set and Supported MCS set
2328 are identical for the first 10 bytes */
074d46d1
JB		 2329 memset(&ht_oper->basic_set, 0, 16);
2330 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2331
074d46d1 2332 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2333}
2334
4bf88530 2335void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2336 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2337 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2338{
2339 enum nl80211_channel_type channel_type;
2340
4bf88530
JB		 2341 if (!ht_oper) {
2342 cfg80211_chandef_create(chandef, control_chan,
2343 NL80211_CHAN_NO_HT);
2344 return;
2345 }
42e7aa77 2346
074d46d1 2347 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2348 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2349 channel_type = NL80211_CHAN_HT20;
2350 break;
2351 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2352 channel_type = NL80211_CHAN_HT40PLUS;
2353 break;
2354 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2355 channel_type = NL80211_CHAN_HT40MINUS;
2356 break;
2357 default:
2358 channel_type = NL80211_CHAN_NO_HT;
2359 }
2360
4bf88530 2361 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2362}
2363
2103dec1
SW		 2364int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2365 const struct ieee80211_supported_band *sband,
2366 const u8 *srates, int srates_len, u32 *rates)
2367{
2368 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2369 int shift = ieee80211_chandef_get_shift(chandef);
2370 struct ieee80211_rate *br;
2371 int brate, rate, i, j, count = 0;
2372
2373 *rates = 0;
2374
2375 for (i = 0; i < srates_len; i++) {
2376 rate = srates[i] & 0x7f;
2377
2378 for (j = 0; j < sband->n_bitrates; j++) {
2379 br = &sband->bitrates[j];
2380 if ((rate_flags & br->flags) != rate_flags)
2381 continue;
2382
2383 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2384 if (brate == rate) {
2385 *rates |= BIT(j);
2386 count++;
2387 break;
2388 }
2389 }
2390 }
2391 return count;
2392}
2393
fc8a7321 2394int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2395 struct sk_buff *skb, bool need_basic,
2396 enum ieee80211_band band)
768db343 2397{
768db343
AN		 2398 struct ieee80211_local *local = sdata->local;
2399 struct ieee80211_supported_band *sband;
2103dec1 2400 int rate, shift;
768db343 2401 u8 i, rates, *pos;
fc8a7321 2402 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2403 u32 rate_flags;
768db343 2404
2103dec1
SW		 2405 shift = ieee80211_vif_get_shift(&sdata->vif);
2406 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2407 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2408 rates = 0;
2409 for (i = 0; i < sband->n_bitrates; i++) {
2410 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2411 continue;
2412 rates++;
2413 }
768db343
AN		 2414 if (rates > 8)
2415 rates = 8;
2416
2417 if (skb_tailroom(skb) < rates + 2)
2418 return -ENOMEM;
2419
2420 pos = skb_put(skb, rates + 2);
2421 *pos++ = WLAN_EID_SUPP_RATES;
2422 *pos++ = rates;
2423 for (i = 0; i < rates; i++) {
657c3e0c 2424 u8 basic = 0;
2103dec1
SW		 2425 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2426 continue;
2427
657c3e0c
AN		 2428 if (need_basic && basic_rates & BIT(i))
2429 basic = 0x80;
768db343 2430 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2431 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2432 5 * (1 << shift));
2433 *pos++ = basic | (u8) rate;
768db343
AN		 2434 }
2435
2436 return 0;
2437}
2438
fc8a7321 2439int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2440 struct sk_buff *skb, bool need_basic,
2441 enum ieee80211_band band)
768db343 2442{
768db343
AN		 2443 struct ieee80211_local *local = sdata->local;
2444 struct ieee80211_supported_band *sband;
cc63ec76 2445 int rate, shift;
768db343 2446 u8 i, exrates, *pos;
fc8a7321 2447 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2448 u32 rate_flags;
2449
2450 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2451 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2452
6b77863b 2453 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2454 exrates = 0;
2455 for (i = 0; i < sband->n_bitrates; i++) {
2456 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2457 continue;
2458 exrates++;
2459 }
2460
768db343
AN		 2461 if (exrates > 8)
2462 exrates -= 8;
2463 else
2464 exrates = 0;
2465
2466 if (skb_tailroom(skb) < exrates + 2)
2467 return -ENOMEM;
2468
2469 if (exrates) {
2470 pos = skb_put(skb, exrates + 2);
2471 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2472 *pos++ = exrates;
2473 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2474 u8 basic = 0;
2103dec1
SW		 2475 if ((rate_flags & sband->bitrates[i].flags)
2476 != rate_flags)
2477 continue;
657c3e0c
AN		 2478 if (need_basic && basic_rates & BIT(i))
2479 basic = 0x80;
2103dec1
SW		 2480 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2481 5 * (1 << shift));
2482 *pos++ = basic | (u8) rate;
768db343
AN		 2483 }
2484 }
2485 return 0;
2486}
1dae27f8
WYG		 2487
2488int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2489{
2490 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2491 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2492
be6bcabc
WYG		 2493 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2494 /* non-managed type inferfaces */
2495 return 0;
2496 }
3a7bba64 2497 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2498}
0d8a0a17 2499EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2500
2501u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2502{
2503 if (!mcs)
2504 return 1;
2505
2506 /* TODO: consider rx_highest */
2507
2508 if (mcs->rx_mask[3])
2509 return 4;
2510 if (mcs->rx_mask[2])
2511 return 3;
2512 if (mcs->rx_mask[1])
2513 return 2;
2514 return 1;
2515}
f4bda337
TP		 2516
2517/**
2518 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2519 * @local: mac80211 hw info struct
2520 * @status: RX status
2521 * @mpdu_len: total MPDU length (including FCS)
2522 * @mpdu_offset: offset into MPDU to calculate timestamp at
2523 *
2524 * This function calculates the RX timestamp at the given MPDU offset, taking
2525 * into account what the RX timestamp was. An offset of 0 will just normalize
2526 * the timestamp to TSF at beginning of MPDU reception.
2527 */
2528u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2529 struct ieee80211_rx_status *status,
2530 unsigned int mpdu_len,
2531 unsigned int mpdu_offset)
2532{
2533 u64 ts = status->mactime;
2534 struct rate_info ri;
2535 u16 rate;
2536
2537 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2538 return 0;
2539
2540 memset(&ri, 0, sizeof(ri));
2541
2542 /* Fill cfg80211 rate info */
2543 if (status->flag & RX_FLAG_HT) {
2544 ri.mcs = status->rate_idx;
2545 ri.flags |= RATE_INFO_FLAGS_MCS;
2546 if (status->flag & RX_FLAG_40MHZ)
b51f3bee
JB		 2547 ri.bw = RATE_INFO_BW_40;
2548 else
2549 ri.bw = RATE_INFO_BW_20;
f4bda337
TP		 2550 if (status->flag & RX_FLAG_SHORT_GI)
2551 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2552 } else if (status->flag & RX_FLAG_VHT) {
2553 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2554 ri.mcs = status->rate_idx;
2555 ri.nss = status->vht_nss;
2556 if (status->flag & RX_FLAG_40MHZ)
b51f3bee
JB		 2557 ri.bw = RATE_INFO_BW_40;
2558 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2559 ri.bw = RATE_INFO_BW_80;
2560 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2561 ri.bw = RATE_INFO_BW_160;
2562 else
2563 ri.bw = RATE_INFO_BW_20;
5614618e
JB		 2564 if (status->flag & RX_FLAG_SHORT_GI)
2565 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2566 } else {
2567 struct ieee80211_supported_band *sband;
2103dec1
SW		 2568 int shift = 0;
2569 int bitrate;
2570
b51f3bee 2571 if (status->flag & RX_FLAG_10MHZ) {
2103dec1 2572 shift = 1;
b51f3bee
JB		 2573 ri.bw = RATE_INFO_BW_10;
2574 } else if (status->flag & RX_FLAG_5MHZ) {
2103dec1 2575 shift = 2;
b51f3bee
JB		 2576 ri.bw = RATE_INFO_BW_5;
2577 } else {
2578 ri.bw = RATE_INFO_BW_20;
2579 }
f4bda337
TP		 2580
2581 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2582 bitrate = sband->bitrates[status->rate_idx].bitrate;
2583 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2584 }
2585
2586 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2587 if (WARN_ONCE(!rate,
2588 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2589 status->flag, status->rate_idx, status->vht_nss))
2590 return 0;
f4bda337
TP		 2591
2592 /* rewind from end of MPDU */
2593 if (status->flag & RX_FLAG_MACTIME_END)
2594 ts -= mpdu_len * 8 * 10 / rate;
2595
2596 ts += mpdu_offset * 8 * 10 / rate;
2597
2598 return ts;
2599}
164eb02d
SW		 2600
2601void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2602{
2603 struct ieee80211_sub_if_data *sdata;
d2859df5 2604 struct cfg80211_chan_def chandef;
164eb02d 2605
34a3740d 2606 mutex_lock(&local->mtx);
164eb02d
SW		 2607 mutex_lock(&local->iflist_mtx);
2608 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2609 /* it might be waiting for the local->mtx, but then
2610 * by the time it gets it, sdata->wdev.cac_started
2611 * will no longer be true
2612 */
2613 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2614
2615 if (sdata->wdev.cac_started) {
d2859df5 2616 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2617 ieee80211_vif_release_channel(sdata);
2618 cfg80211_cac_event(sdata->dev,
d2859df5 2619 &chandef,
164eb02d
SW		 2620 NL80211_RADAR_CAC_ABORTED,
2621 GFP_KERNEL);
2622 }
2623 }
2624 mutex_unlock(&local->iflist_mtx);
34a3740d 2625 mutex_unlock(&local->mtx);
164eb02d
SW		 2626}
2627
2628void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2629{
2630 struct ieee80211_local *local =
2631 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2632 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2633 struct ieee80211_chanctx *ctx;
2634 int num_chanctx = 0;
2635
2636 mutex_lock(&local->chanctx_mtx);
2637 list_for_each_entry(ctx, &local->chanctx_list, list) {
2638 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2639 continue;
2640
2641 num_chanctx++;
2642 chandef = ctx->conf.def;
2643 }
2644 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2645
2646 ieee80211_dfs_cac_cancel(local);
2647
486cf4c0
MK		 2648 if (num_chanctx > 1)
2649 /* XXX: multi-channel is not supported yet */
164eb02d 2650 WARN_ON(1);
84a3d1c9 2651 else
164eb02d 2652 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2653}
2654
2655void ieee80211_radar_detected(struct ieee80211_hw *hw)
2656{
2657 struct ieee80211_local *local = hw_to_local(hw);
2658
2659 trace_api_radar_detected(local);
2660
2661 ieee80211_queue_work(hw, &local->radar_detected_work);
2662}
2663EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2664
2665u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2666{
2667 u32 ret;
2668 int tmp;
2669
2670 switch (c->width) {
2671 case NL80211_CHAN_WIDTH_20:
2672 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2673 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2674 break;
2675 case NL80211_CHAN_WIDTH_40:
2676 c->width = NL80211_CHAN_WIDTH_20;
2677 c->center_freq1 = c->chan->center_freq;
2678 ret = IEEE80211_STA_DISABLE_40MHZ |
2679 IEEE80211_STA_DISABLE_VHT;
2680 break;
2681 case NL80211_CHAN_WIDTH_80:
2682 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2683 /* n_P40 */
2684 tmp /= 2;
2685 /* freq_P40 */
2686 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2687 c->width = NL80211_CHAN_WIDTH_40;
2688 ret = IEEE80211_STA_DISABLE_VHT;
2689 break;
2690 case NL80211_CHAN_WIDTH_80P80:
2691 c->center_freq2 = 0;
2692 c->width = NL80211_CHAN_WIDTH_80;
2693 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2694 IEEE80211_STA_DISABLE_160MHZ;
2695 break;
2696 case NL80211_CHAN_WIDTH_160:
2697 /* n_P20 */
2698 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2699 /* n_P80 */
2700 tmp /= 4;
2701 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2702 c->width = NL80211_CHAN_WIDTH_80;
2703 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2704 IEEE80211_STA_DISABLE_160MHZ;
2705 break;
2706 default:
2707 case NL80211_CHAN_WIDTH_20_NOHT:
2708 WARN_ON_ONCE(1);
2709 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2710 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2711 break;
2712 case NL80211_CHAN_WIDTH_5:
2713 case NL80211_CHAN_WIDTH_10:
2714 WARN_ON_ONCE(1);
2715 /* keep c->width */
2716 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2717 break;
2718 }
2719
2720 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2721
2722 return ret;
2723}
687da132
EG		 2724
2725/*
2726 * Returns true if smps_mode_new is strictly more restrictive than
2727 * smps_mode_old.
2728 */
2729bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2730 enum ieee80211_smps_mode smps_mode_new)
2731{
2732 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2733 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2734 return false;
2735
2736 switch (smps_mode_old) {
2737 case IEEE80211_SMPS_STATIC:
2738 return false;
2739 case IEEE80211_SMPS_DYNAMIC:
2740 return smps_mode_new == IEEE80211_SMPS_STATIC;
2741 case IEEE80211_SMPS_OFF:
2742 return smps_mode_new != IEEE80211_SMPS_OFF;
2743 default:
2744 WARN_ON(1);
2745 }
2746
2747 return false;
2748}
c6da674a
CYY		 2749
2750int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2751 struct cfg80211_csa_settings *csa_settings)
2752{
2753 struct sk_buff *skb;
2754 struct ieee80211_mgmt *mgmt;
2755 struct ieee80211_local *local = sdata->local;
2756 int freq;
2757 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2758 sizeof(mgmt->u.action.u.chan_switch);
2759 u8 *pos;
2760
2761 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2762 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2763 return -EOPNOTSUPP;
2764
2765 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2766 5 + /* channel switch announcement element */
2767 3 + /* secondary channel offset element */
2768 8); /* mesh channel switch parameters element */
2769 if (!skb)
2770 return -ENOMEM;
2771
2772 skb_reserve(skb, local->tx_headroom);
2773 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2774 memset(mgmt, 0, hdr_len);
2775 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2776 IEEE80211_STYPE_ACTION);
2777
2778 eth_broadcast_addr(mgmt->da);
2779 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2780 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2781 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2782 } else {
2783 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2784 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2785 }
2786 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2787 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2788 pos = skb_put(skb, 5);
2789 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2790 *pos++ = 3; /* IE length */
2791 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2792 freq = csa_settings->chandef.chan->center_freq;
2793 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2794 *pos++ = csa_settings->count; /* count */
2795
2796 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2797 enum nl80211_channel_type ch_type;
2798
2799 skb_put(skb, 3);
2800 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2801 *pos++ = 1; /* IE length */
2802 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2803 if (ch_type == NL80211_CHAN_HT40PLUS)
2804 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2805 else
2806 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2807 }
2808
2809 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2810 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2811
2812 skb_put(skb, 8);
2813 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2814 *pos++ = 6; /* IE length */
2815 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2816 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2817 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2818 *pos++ |= csa_settings->block_tx ?
2819 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2820 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2821 pos += 2;
ca91dc97 2822 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2823 pos += 2;
c6da674a
CYY		 2824 }
2825
2826 ieee80211_tx_skb(sdata, skb);
2827 return 0;
2828}
2475b1cc
MS		 2829
2830bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2831{
2832 return !(cs == NULL || cs->cipher == 0 ||
2833 cs->hdr_len < cs->pn_len + cs->pn_off ||
2834 cs->hdr_len <= cs->key_idx_off ||
2835 cs->key_idx_shift > 7 ||
2836 cs->key_idx_mask == 0);
2837}
2838
2839bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2840{
2841 int i;
2842
2843 /* Ensure we have enough iftype bitmap space for all iftype values */
2844 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2845
2846 for (i = 0; i < n; i++)
2847 if (!ieee80211_cs_valid(&cs[i]))
2848 return false;
2849
2850 return true;
2851}
2852
2853const struct ieee80211_cipher_scheme *
2854ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2855 enum nl80211_iftype iftype)
2856{
2857 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2858 int n = local->hw.n_cipher_schemes;
2859 int i;
2860 const struct ieee80211_cipher_scheme *cs = NULL;
2861
2862 for (i = 0; i < n; i++) {
2863 if (l[i].cipher == cipher) {
2864 cs = &l[i];
2865 break;
2866 }
2867 }
2868
2869 if (!cs || !(cs->iftype & BIT(iftype)))
2870 return NULL;
2871
2872 return cs;
2873}
2874
2875int ieee80211_cs_headroom(struct ieee80211_local *local,
2876 struct cfg80211_crypto_settings *crypto,
2877 enum nl80211_iftype iftype)
2878{
2879 const struct ieee80211_cipher_scheme *cs;
2880 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2881 int i;
2882
2883 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2884 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2885 iftype);
2886
2887 if (cs && headroom < cs->hdr_len)
2888 headroom = cs->hdr_len;
2889 }
2890
2891 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2892 if (cs && headroom < cs->hdr_len)
2893 headroom = cs->hdr_len;
2894
2895 return headroom;
2896}
a7022e65
FF		 2897
2898static bool
2899ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2900{
2901 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2902 int skip;
2903
2904 if (end > 0)
2905 return false;
2906
2907 /* End time is in the past, check for repetitions */
2908 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2909 if (data->count[i] < 255) {
2910 if (data->count[i] <= skip) {
2911 data->count[i] = 0;
2912 return false;
2913 }
2914
2915 data->count[i] -= skip;
2916 }
2917
2918 data->desc[i].start += skip * data->desc[i].interval;
2919
2920 return true;
2921}
2922
2923static bool
2924ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2925 s32 *offset)
2926{
2927 bool ret = false;
2928 int i;
2929
2930 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2931 s32 cur;
2932
2933 if (!data->count[i])
2934 continue;
2935
2936 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2937 ret = true;
2938
2939 cur = data->desc[i].start - tsf;
2940 if (cur > *offset)
2941 continue;
2942
2943 cur = data->desc[i].start + data->desc[i].duration - tsf;
2944 if (cur > *offset)
2945 *offset = cur;
2946 }
2947
2948 return ret;
2949}
2950
2951static u32
2952ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2953{
2954 s32 offset = 0;
2955 int tries = 0;
2956 /*
2957 * arbitrary limit, used to avoid infinite loops when combined NoA
2958 * descriptors cover the full time period.
2959 */
2960 int max_tries = 5;
2961
2962 ieee80211_extend_absent_time(data, tsf, &offset);
2963 do {
2964 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2965 break;
2966
2967 tries++;
2968 } while (tries < max_tries);
2969
2970 return offset;
2971}
2972
2973void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2974{
2975 u32 next_offset = BIT(31) - 1;
2976 int i;
2977
2978 data->absent = 0;
2979 data->has_next_tsf = false;
2980 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2981 s32 start;
2982
2983 if (!data->count[i])
2984 continue;
2985
2986 ieee80211_extend_noa_desc(data, tsf, i);
2987 start = data->desc[i].start - tsf;
2988 if (start <= 0)
2989 data->absent |= BIT(i);
2990
2991 if (next_offset > start)
2992 next_offset = start;
2993
2994 data->has_next_tsf = true;
2995 }
2996
2997 if (data->absent)
2998 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2999
3000 data->next_tsf = tsf + next_offset;
3001}
3002EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3003
3004int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3005 struct ieee80211_noa_data *data, u32 tsf)
3006{
3007 int ret = 0;
3008 int i;
3009
3010 memset(data, 0, sizeof(*data));
3011
3012 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3013 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3014
3015 if (!desc->count || !desc->duration)
3016 continue;
3017
3018 data->count[i] = desc->count;
3019 data->desc[i].start = le32_to_cpu(desc->start_time);
3020 data->desc[i].duration = le32_to_cpu(desc->duration);
3021 data->desc[i].interval = le32_to_cpu(desc->interval);
3022
3023 if (data->count[i] > 1 &&
3024 data->desc[i].interval < data->desc[i].duration)
3025 continue;
3026
3027 ieee80211_extend_noa_desc(data, tsf, i);
3028 ret++;
3029 }
3030
3031 if (ret)
3032 ieee80211_update_p2p_noa(data, tsf);
3033
3034 return ret;
3035}
3036EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 3037
3038void ieee80211_recalc_dtim(struct ieee80211_local *local,
3039 struct ieee80211_sub_if_data *sdata)
3040{
3041 u64 tsf = drv_get_tsf(local, sdata);
3042 u64 dtim_count = 0;
3043 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3044 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3045 struct ps_data *ps;
3046 u8 bcns_from_dtim;
3047
3048 if (tsf == -1ULL || !beacon_int || !dtim_period)
3049 return;
3050
3051 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3052 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3053 if (!sdata->bss)
3054 return;
3055
3056 ps = &sdata->bss->ps;
3057 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3058 ps = &sdata->u.mesh.ps;
3059 } else {
3060 return;
3061 }
3062
3063 /*
3064 * actually finds last dtim_count, mac80211 will update in
3065 * __beacon_add_tim().
3066 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3067 */
3068 do_div(tsf, beacon_int);
3069 bcns_from_dtim = do_div(tsf, dtim_period);
3070 /* just had a DTIM */
3071 if (!bcns_from_dtim)
3072 dtim_count = 0;
3073 else
3074 dtim_count = dtim_period - bcns_from_dtim;
3075
3076 ps->dtim_count = dtim_count;
3077}
73de86a3 3078
71e6195e
MK		 3079static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3080 struct ieee80211_chanctx *ctx)
3081{
3082 struct ieee80211_sub_if_data *sdata;
3083 u8 radar_detect = 0;
3084
3085 lockdep_assert_held(&local->chanctx_mtx);
3086
3087 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3088 return 0;
3089
3090 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3091 if (sdata->reserved_radar_required)
3092 radar_detect |= BIT(sdata->reserved_chandef.width);
3093
3094 /*
3095 * An in-place reservation context should not have any assigned vifs
3096 * until it replaces the other context.
3097 */
3098 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3099 !list_empty(&ctx->assigned_vifs));
3100
3101 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3102 if (sdata->radar_required)
3103 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3104
3105 return radar_detect;
3106}
3107
73de86a3
LC		 3108int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3109 const struct cfg80211_chan_def *chandef,
3110 enum ieee80211_chanctx_mode chanmode,
3111 u8 radar_detect)
3112{
3113 struct ieee80211_local *local = sdata->local;
3114 struct ieee80211_sub_if_data *sdata_iter;
3115 enum nl80211_iftype iftype = sdata->wdev.iftype;
3116 int num[NUM_NL80211_IFTYPES];
3117 struct ieee80211_chanctx *ctx;
b6a55015 3118 int num_different_channels = 0;
73de86a3
LC		 3119 int total = 1;
3120
3121 lockdep_assert_held(&local->chanctx_mtx);
3122
3123 if (WARN_ON(hweight32(radar_detect) > 1))
3124 return -EINVAL;
3125
b6a55015
LC		 3126 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3127 !chandef->chan))
73de86a3
LC		 3128 return -EINVAL;
3129
b6a55015
LC		 3130 if (chandef)
3131 num_different_channels = 1;
3132
73de86a3
LC		 3133 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3134 return -EINVAL;
3135
3136 /* Always allow software iftypes */
3137 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3138 if (radar_detect)
3139 return -EINVAL;
3140 return 0;
3141 }
3142
3143 memset(num, 0, sizeof(num));
3144
3145 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3146 num[iftype] = 1;
3147
3148 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3149 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3150 continue;
71e6195e 3151 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3152 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3153 num_different_channels++;
3154 continue;
3155 }
b6a55015 3156 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3157 cfg80211_chandef_compatible(chandef,
3158 &ctx->conf.def))
3159 continue;
3160 num_different_channels++;
3161 }
3162
3163 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3164 struct wireless_dev *wdev_iter;
3165
3166 wdev_iter = &sdata_iter->wdev;
3167
3168 if (sdata_iter == sdata ||
3169 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3170 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3171 continue;
3172
3173 num[wdev_iter->iftype]++;
3174 total++;
3175 }
3176
3177 if (total == 1 && !radar_detect)
3178 return 0;
3179
3180 return cfg80211_check_combinations(local->hw.wiphy,
3181 num_different_channels,
3182 radar_detect, num);
3183}
6fa001bc
MK		 3184
3185static void
3186ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3187 void *data)
3188{
3189 u32 *max_num_different_channels = data;
3190
3191 *max_num_different_channels = max(*max_num_different_channels,
3192 c->num_different_channels);
3193}
3194
3195int ieee80211_max_num_channels(struct ieee80211_local *local)
3196{
3197 struct ieee80211_sub_if_data *sdata;
3198 int num[NUM_NL80211_IFTYPES] = {};
3199 struct ieee80211_chanctx *ctx;
3200 int num_different_channels = 0;
3201 u8 radar_detect = 0;
3202 u32 max_num_different_channels = 1;
3203 int err;
3204
3205 lockdep_assert_held(&local->chanctx_mtx);
3206
3207 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3208 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3209 continue;
3210
6fa001bc
MK		 3211 num_different_channels++;
3212
71e6195e 3213 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3214 }
3215
3216 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3217 num[sdata->wdev.iftype]++;
3218
3219 err = cfg80211_iter_combinations(local->hw.wiphy,
3220 num_different_channels, radar_detect,
3221 num, ieee80211_iter_max_chans,
3222 &max_num_different_channels);
3223 if (err < 0)
3224 return err;
3225
3226 return max_num_different_channels;
3227}
40b861a0
AN		 3228
3229u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3230{
3231 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3232 *buf++ = 7; /* len */
3233 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3234 *buf++ = 0x50;
3235 *buf++ = 0xf2;
3236 *buf++ = 2; /* WME */
3237 *buf++ = 0; /* WME info */
3238 *buf++ = 1; /* WME ver */
3239 *buf++ = qosinfo; /* U-APSD no in use */
3240
3241 return buf;
3242}
Linux 6.x block layer and io_uring tree(s)