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mac80211: remove unused variable in ieee80211_parse_ch_switch_ie()
[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,
581 unsigned int queues)
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
77be2c54 597 drv_flush(local, sdata, queues, false);
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
LK		 604void ieee80211_flush_queues(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata)
606{
607 __ieee80211_flush_queues(local, sdata, 0);
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
747 * the suspend->resume cycle. If this WARN is seen then there
748 * is a bug with either the driver suspend or something in
749 * mac80211 stuffing into the workqueue which we haven't yet
750 * cleared during mac80211's suspend cycle.
751 */
752static bool ieee80211_can_queue_work(struct ieee80211_local *local)
753{
ceb99fe0
JB		 754 if (WARN(local->suspended && !local->resuming,
755 "queueing ieee80211 work while going to suspend\n"))
756 return false;
42935eca
LR		 757
758 return true;
759}
760
761void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
762{
763 struct ieee80211_local *local = hw_to_local(hw);
764
765 if (!ieee80211_can_queue_work(local))
766 return;
767
768 queue_work(local->workqueue, work);
769}
770EXPORT_SYMBOL(ieee80211_queue_work);
771
772void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
773 struct delayed_work *dwork,
774 unsigned long delay)
775{
776 struct ieee80211_local *local = hw_to_local(hw);
777
778 if (!ieee80211_can_queue_work(local))
779 return;
780
781 queue_delayed_work(local->workqueue, dwork, delay);
782}
783EXPORT_SYMBOL(ieee80211_queue_delayed_work);
784
35d865af 785u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 786 struct ieee802_11_elems *elems,
787 u64 filter, u32 crc)
788{
789 size_t left = len;
35d865af 790 const u8 *pos = start;
dd76986b 791 bool calc_crc = filter != 0;
fcff4f10 792 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 793 const u8 *ie;
dd76986b 794
fcff4f10 795 bitmap_zero(seen_elems, 256);
dd76986b
JB		 796 memset(elems, 0, sizeof(*elems));
797 elems->ie_start = start;
798 elems->total_len = len;
799
800 while (left >= 2) {
801 u8 id, elen;
fcff4f10 802 bool elem_parse_failed;
dd76986b
JB		 803
804 id = *pos++;
805 elen = *pos++;
806 left -= 2;
807
fcff4f10
PS		 808 if (elen > left) {
809 elems->parse_error = true;
dd76986b 810 break;
fcff4f10
PS		 811 }
812
9690fb16
JB		 813 switch (id) {
814 case WLAN_EID_SSID:
815 case WLAN_EID_SUPP_RATES:
816 case WLAN_EID_FH_PARAMS:
817 case WLAN_EID_DS_PARAMS:
818 case WLAN_EID_CF_PARAMS:
819 case WLAN_EID_TIM:
820 case WLAN_EID_IBSS_PARAMS:
821 case WLAN_EID_CHALLENGE:
822 case WLAN_EID_RSN:
823 case WLAN_EID_ERP_INFO:
824 case WLAN_EID_EXT_SUPP_RATES:
825 case WLAN_EID_HT_CAPABILITY:
826 case WLAN_EID_HT_OPERATION:
827 case WLAN_EID_VHT_CAPABILITY:
828 case WLAN_EID_VHT_OPERATION:
829 case WLAN_EID_MESH_ID:
830 case WLAN_EID_MESH_CONFIG:
831 case WLAN_EID_PEER_MGMT:
832 case WLAN_EID_PREQ:
833 case WLAN_EID_PREP:
834 case WLAN_EID_PERR:
835 case WLAN_EID_RANN:
836 case WLAN_EID_CHANNEL_SWITCH:
837 case WLAN_EID_EXT_CHANSWITCH_ANN:
838 case WLAN_EID_COUNTRY:
839 case WLAN_EID_PWR_CONSTRAINT:
840 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 841 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 842 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 843 case WLAN_EID_CHAN_SWITCH_PARAM:
9041c1fa 844 case WLAN_EID_EXT_CAPABILITY:
53837584
AN		 845 case WLAN_EID_CHAN_SWITCH_TIMING:
846 case WLAN_EID_LINK_ID:
b2e506bf
JB		 847 /*
848 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
849 * that if the content gets bigger it might be needed more than once
850 */
9690fb16
JB		 851 if (test_bit(id, seen_elems)) {
852 elems->parse_error = true;
853 left -= elen;
854 pos += elen;
855 continue;
856 }
857 break;
fcff4f10 858 }
dd76986b
JB		 859
860 if (calc_crc && id < 64 && (filter & (1ULL << id)))
861 crc = crc32_be(crc, pos - 2, elen + 2);
862
fcff4f10
PS		 863 elem_parse_failed = false;
864
dd76986b 865 switch (id) {
53837584
AN		 866 case WLAN_EID_LINK_ID:
867 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
868 elem_parse_failed = true;
869 break;
870 }
871 elems->lnk_id = (void *)(pos - 2);
872 break;
873 case WLAN_EID_CHAN_SWITCH_TIMING:
874 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
875 elem_parse_failed = true;
876 break;
877 }
878 elems->ch_sw_timing = (void *)pos;
879 break;
9041c1fa
AN		 880 case WLAN_EID_EXT_CAPABILITY:
881 elems->ext_capab = pos;
882 elems->ext_capab_len = elen;
883 break;
dd76986b
JB		 884 case WLAN_EID_SSID:
885 elems->ssid = pos;
886 elems->ssid_len = elen;
887 break;
888 case WLAN_EID_SUPP_RATES:
889 elems->supp_rates = pos;
890 elems->supp_rates_len = elen;
891 break;
dd76986b 892 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 893 if (elen >= 1)
894 elems->ds_params = pos;
895 else
896 elem_parse_failed = true;
dd76986b 897 break;
dd76986b
JB		 898 case WLAN_EID_TIM:
899 if (elen >= sizeof(struct ieee80211_tim_ie)) {
900 elems->tim = (void *)pos;
901 elems->tim_len = elen;
fcff4f10
PS		 902 } else
903 elem_parse_failed = true;
dd76986b 904 break;
dd76986b
JB		 905 case WLAN_EID_CHALLENGE:
906 elems->challenge = pos;
907 elems->challenge_len = elen;
908 break;
909 case WLAN_EID_VENDOR_SPECIFIC:
910 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
911 pos[2] == 0xf2) {
912 /* Microsoft OUI (00:50:F2) */
913
914 if (calc_crc)
915 crc = crc32_be(crc, pos - 2, elen + 2);
916
441a33ba 917 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 918 /* OUI Type 2 - WMM IE */
919 if (pos[4] == 0) {
920 elems->wmm_info = pos;
921 elems->wmm_info_len = elen;
922 } else if (pos[4] == 1) {
923 elems->wmm_param = pos;
924 elems->wmm_param_len = elen;
925 }
926 }
927 }
928 break;
929 case WLAN_EID_RSN:
930 elems->rsn = pos;
931 elems->rsn_len = elen;
932 break;
933 case WLAN_EID_ERP_INFO:
1946bed9
JB		 934 if (elen >= 1)
935 elems->erp_info = pos;
936 else
937 elem_parse_failed = true;
dd76986b
JB		 938 break;
939 case WLAN_EID_EXT_SUPP_RATES:
940 elems->ext_supp_rates = pos;
941 elems->ext_supp_rates_len = elen;
942 break;
943 case WLAN_EID_HT_CAPABILITY:
944 if (elen >= sizeof(struct ieee80211_ht_cap))
945 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 946 else
947 elem_parse_failed = true;
dd76986b 948 break;
074d46d1
JB		 949 case WLAN_EID_HT_OPERATION:
950 if (elen >= sizeof(struct ieee80211_ht_operation))
951 elems->ht_operation = (void *)pos;
fcff4f10
PS		 952 else
953 elem_parse_failed = true;
dd76986b 954 break;
818255ea
MP		 955 case WLAN_EID_VHT_CAPABILITY:
956 if (elen >= sizeof(struct ieee80211_vht_cap))
957 elems->vht_cap_elem = (void *)pos;
958 else
959 elem_parse_failed = true;
960 break;
961 case WLAN_EID_VHT_OPERATION:
962 if (elen >= sizeof(struct ieee80211_vht_operation))
963 elems->vht_operation = (void *)pos;
964 else
965 elem_parse_failed = true;
966 break;
bee7f586
JB		 967 case WLAN_EID_OPMODE_NOTIF:
968 if (elen > 0)
969 elems->opmode_notif = pos;
970 else
971 elem_parse_failed = true;
972 break;
dd76986b
JB		 973 case WLAN_EID_MESH_ID:
974 elems->mesh_id = pos;
975 elems->mesh_id_len = elen;
976 break;
977 case WLAN_EID_MESH_CONFIG:
978 if (elen >= sizeof(struct ieee80211_meshconf_ie))
979 elems->mesh_config = (void *)pos;
fcff4f10
PS		 980 else
981 elem_parse_failed = true;
dd76986b
JB		 982 break;
983 case WLAN_EID_PEER_MGMT:
984 elems->peering = pos;
985 elems->peering_len = elen;
986 break;
3f52b7e3
MP		 987 case WLAN_EID_MESH_AWAKE_WINDOW:
988 if (elen >= 2)
989 elems->awake_window = (void *)pos;
990 break;
dd76986b
JB		 991 case WLAN_EID_PREQ:
992 elems->preq = pos;
993 elems->preq_len = elen;
994 break;
995 case WLAN_EID_PREP:
996 elems->prep = pos;
997 elems->prep_len = elen;
998 break;
999 case WLAN_EID_PERR:
1000 elems->perr = pos;
1001 elems->perr_len = elen;
1002 break;
1003 case WLAN_EID_RANN:
1004 if (elen >= sizeof(struct ieee80211_rann_ie))
1005 elems->rann = (void *)pos;
fcff4f10
PS		 1006 else
1007 elem_parse_failed = true;
dd76986b
JB		 1008 break;
1009 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 1010 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1011 elem_parse_failed = true;
1012 break;
1013 }
1014 elems->ch_switch_ie = (void *)pos;
dd76986b 1015 break;
b4f286a1
JB		 1016 case WLAN_EID_EXT_CHANSWITCH_ANN:
1017 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1018 elem_parse_failed = true;
1019 break;
1020 }
1021 elems->ext_chansw_ie = (void *)pos;
1022 break;
85220d71
JB		 1023 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1024 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1025 elem_parse_failed = true;
1026 break;
1027 }
1028 elems->sec_chan_offs = (void *)pos;
1029 break;
8f2535b9
CYY		 1030 case WLAN_EID_CHAN_SWITCH_PARAM:
1031 if (elen !=
1032 sizeof(*elems->mesh_chansw_params_ie)) {
1033 elem_parse_failed = true;
1034 break;
1035 }
1036 elems->mesh_chansw_params_ie = (void *)pos;
1037 break;
b2e506bf
JB		 1038 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1039 if (!action ||
1040 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1041 elem_parse_failed = true;
1042 break;
1043 }
1044 elems->wide_bw_chansw_ie = (void *)pos;
1045 break;
1046 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1047 if (action) {
1048 elem_parse_failed = true;
1049 break;
1050 }
1051 /*
1052 * This is a bit tricky, but as we only care about
1053 * the wide bandwidth channel switch element, so
1054 * just parse it out manually.
1055 */
1056 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1057 pos, elen);
1058 if (ie) {
1059 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1060 elems->wide_bw_chansw_ie =
1061 (void *)(ie + 2);
1062 else
1063 elem_parse_failed = true;
1064 }
1065 break;
dd76986b
JB		 1066 case WLAN_EID_COUNTRY:
1067 elems->country_elem = pos;
1068 elems->country_elem_len = elen;
1069 break;
1070 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1071 if (elen != 1) {
1072 elem_parse_failed = true;
1073 break;
1074 }
dd76986b 1075 elems->pwr_constr_elem = pos;
dd76986b 1076 break;
c8d65917
SG		 1077 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1078 /* Lots of different options exist, but we only care
1079 * about the Dynamic Transmit Power Control element.
1080 * First check for the Cisco OUI, then for the DTPC
1081 * tag (0x00).
1082 */
1083 if (elen < 4) {
1084 elem_parse_failed = true;
1085 break;
1086 }
1087
1088 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1089 pos[2] != 0x96 || pos[3] != 0x00)
1090 break;
1091
1092 if (elen != 6) {
1093 elem_parse_failed = true;
1094 break;
1095 }
1096
1097 if (calc_crc)
1098 crc = crc32_be(crc, pos - 2, elen + 2);
1099
1100 elems->cisco_dtpc_elem = pos;
1101 break;
dd76986b 1102 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1103 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1104 elems->timeout_int = (void *)pos;
1105 else
1106 elem_parse_failed = true;
dd76986b
JB		 1107 break;
1108 default:
1109 break;
1110 }
1111
fcff4f10
PS		 1112 if (elem_parse_failed)
1113 elems->parse_error = true;
1114 else
5df45690 1115 __set_bit(id, seen_elems);
fcff4f10 1116
dd76986b
JB		 1117 left -= elen;
1118 pos += elen;
1119 }
1120
fcff4f10
PS		 1121 if (left != 0)
1122 elems->parse_error = true;
1123
dd76986b
JB		 1124 return crc;
1125}
1126
3abead59
JB		 1127void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1128 bool bss_notify)
5825fe10
JB		 1129{
1130 struct ieee80211_local *local = sdata->local;
1131 struct ieee80211_tx_queue_params qparam;
55de908a 1132 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1133 int ac;
a8ce8544 1134 bool use_11b, enable_qos;
239281f8 1135 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
aa837e1d 1136 int aCWmin, aCWmax;
5825fe10
JB		 1137
1138 if (!local->ops->conf_tx)
1139 return;
1140
54bcbc69
JB		 1141 if (local->hw.queues < IEEE80211_NUM_ACS)
1142 return;
1143
5825fe10
JB		 1144 memset(&qparam, 0, sizeof(qparam));
1145
55de908a
JB		 1146 rcu_read_lock();
1147 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1148 use_11b = (chanctx_conf &&
4bf88530 1149 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1150 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1151 rcu_read_unlock();
5825fe10 1152
a8ce8544
SG		 1153 /*
1154 * By default disable QoS in STA mode for old access points, which do
1155 * not support 802.11e. New APs will provide proper queue parameters,
1156 * that we will configure later.
1157 */
1158 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1159
239281f8
RL		 1160 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1161
1f4ffde8
FZ		 1162 /* Set defaults according to 802.11-2007 Table 7-37 */
1163 aCWmax = 1023;
1164 if (use_11b)
1165 aCWmin = 31;
1166 else
1167 aCWmin = 15;
1168
1169 /* Confiure old 802.11b/g medium access rules. */
1170 qparam.cw_max = aCWmax;
1171 qparam.cw_min = aCWmin;
1172 qparam.txop = 0;
1173 qparam.aifs = 2;
aa837e1d 1174
1f4ffde8
FZ		 1175 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1176 /* Update if QoS is enabled. */
a8ce8544
SG		 1177 if (enable_qos) {
1178 switch (ac) {
1179 case IEEE80211_AC_BK:
1180 qparam.cw_max = aCWmax;
1181 qparam.cw_min = aCWmin;
1182 qparam.txop = 0;
239281f8
RL		 1183 if (is_ocb)
1184 qparam.aifs = 9;
1185 else
1186 qparam.aifs = 7;
a8ce8544
SG		 1187 break;
1188 /* never happens but let's not leave undefined */
1189 default:
1190 case IEEE80211_AC_BE:
1191 qparam.cw_max = aCWmax;
1192 qparam.cw_min = aCWmin;
1193 qparam.txop = 0;
239281f8
RL		 1194 if (is_ocb)
1195 qparam.aifs = 6;
1196 else
1197 qparam.aifs = 3;
a8ce8544
SG		 1198 break;
1199 case IEEE80211_AC_VI:
1200 qparam.cw_max = aCWmin;
1201 qparam.cw_min = (aCWmin + 1) / 2 - 1;
239281f8
RL		 1202 if (is_ocb)
1203 qparam.txop = 0;
1204 else if (use_11b)
a8ce8544
SG		 1205 qparam.txop = 6016/32;
1206 else
1207 qparam.txop = 3008/32;
239281f8
RL		 1208
1209 if (is_ocb)
1210 qparam.aifs = 3;
1211 else
1212 qparam.aifs = 2;
a8ce8544
SG		 1213 break;
1214 case IEEE80211_AC_VO:
1215 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1216 qparam.cw_min = (aCWmin + 1) / 4 - 1;
239281f8
RL		 1217 if (is_ocb)
1218 qparam.txop = 0;
1219 else if (use_11b)
a8ce8544
SG		 1220 qparam.txop = 3264/32;
1221 else
1222 qparam.txop = 1504/32;
1223 qparam.aifs = 2;
1224 break;
1225 }
aa837e1d 1226 }
5825fe10 1227
ab13315a
KV		 1228 qparam.uapsd = false;
1229
54bcbc69
JB		 1230 sdata->tx_conf[ac] = qparam;
1231 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1232 }
e1b3ec1a 1233
f142c6b9
JB		 1234 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1235 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1236 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1237 if (bss_notify)
1238 ieee80211_bss_info_change_notify(sdata,
1239 BSS_CHANGED_QOS);
d9734979 1240 }
5825fe10 1241}
e50db65c 1242
46900298 1243void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1244 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1245 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1246 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1247 u32 tx_flags)
46900298
JB		 1248{
1249 struct ieee80211_local *local = sdata->local;
1250 struct sk_buff *skb;
1251 struct ieee80211_mgmt *mgmt;
fffd0934 1252 int err;
46900298 1253
15e230ab 1254 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1255 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1256 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1257 if (!skb)
46900298 1258 return;
d15b8459 1259
744462a9 1260 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1261
1262 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1263 memset(mgmt, 0, 24 + 6);
1264 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1265 IEEE80211_STYPE_AUTH);
efa6a09d 1266 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1267 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1268 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1269 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1270 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1271 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1272 if (extra)
1273 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1274
fffd0934
JB		 1275 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1276 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1277 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1278 WARN_ON(err);
1279 }
1280
1672c0e3
JB		 1281 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1282 tx_flags;
62ae67be 1283 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1284}
1285
6ae16775
AQ		 1286void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1287 const u8 *bssid, u16 stype, u16 reason,
1288 bool send_frame, u8 *frame_buf)
1289{
1290 struct ieee80211_local *local = sdata->local;
1291 struct sk_buff *skb;
1292 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1293
1294 /* build frame */
1295 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1296 mgmt->duration = 0; /* initialize only */
1297 mgmt->seq_ctrl = 0; /* initialize only */
1298 memcpy(mgmt->da, bssid, ETH_ALEN);
1299 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1300 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1301 /* u.deauth.reason_code == u.disassoc.reason_code */
1302 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1303
1304 if (send_frame) {
1305 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1306 IEEE80211_DEAUTH_FRAME_LEN);
1307 if (!skb)
1308 return;
1309
1310 skb_reserve(skb, local->hw.extra_tx_headroom);
1311
1312 /* copy in frame */
1313 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1314 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1315
1316 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1317 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1318 IEEE80211_SKB_CB(skb)->flags |=
1319 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1320
1321 ieee80211_tx_skb(sdata, skb);
1322 }
1323}
1324
c56ef672
DS		 1325static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1326 u8 *buffer, size_t buffer_len,
1327 const u8 *ie, size_t ie_len,
1328 enum ieee80211_band band,
1329 u32 rate_mask,
1330 struct cfg80211_chan_def *chandef,
1331 size_t *offset)
de95a54b
JB		 1332{
1333 struct ieee80211_supported_band *sband;
c604b9f2 1334 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1335 size_t noffset;
8e664fb3 1336 int supp_rates_len, i;
8dcb2003
JM		 1337 u8 rates[32];
1338 int num_rates;
1339 int ext_rates_len;
2103dec1
SW		 1340 int shift;
1341 u32 rate_flags;
40a11ca8 1342 bool have_80mhz = false;
de95a54b 1343
c56ef672
DS		 1344 *offset = 0;
1345
4d36ec58 1346 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1347 if (WARN_ON_ONCE(!sband))
1348 return 0;
de95a54b 1349
2103dec1
SW		 1350 rate_flags = ieee80211_chandef_rate_flags(chandef);
1351 shift = ieee80211_chandef_get_shift(chandef);
1352
8dcb2003
JM		 1353 num_rates = 0;
1354 for (i = 0; i < sband->n_bitrates; i++) {
1355 if ((BIT(i) & rate_mask) == 0)
1356 continue; /* skip rate */
2103dec1
SW		 1357 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1358 continue;
1359
1360 rates[num_rates++] =
1361 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1362 (1 << shift) * 5);
8dcb2003
JM		 1363 }
1364
1365 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1366
c604b9f2
JB		 1367 if (end - pos < 2 + supp_rates_len)
1368 goto out_err;
de95a54b 1369 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1370 *pos++ = supp_rates_len;
8dcb2003
JM		 1371 memcpy(pos, rates, supp_rates_len);
1372 pos += supp_rates_len;
8e664fb3
JB		 1373
1374 /* insert "request information" if in custom IEs */
1375 if (ie && ie_len) {
1376 static const u8 before_extrates[] = {
1377 WLAN_EID_SSID,
1378 WLAN_EID_SUPP_RATES,
1379 WLAN_EID_REQUEST,
1380 };
1381 noffset = ieee80211_ie_split(ie, ie_len,
1382 before_extrates,
1383 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1384 *offset);
1385 if (end - pos < noffset - *offset)
c604b9f2 1386 goto out_err;
c56ef672
DS		 1387 memcpy(pos, ie + *offset, noffset - *offset);
1388 pos += noffset - *offset;
1389 *offset = noffset;
8e664fb3
JB		 1390 }
1391
8dcb2003
JM		 1392 ext_rates_len = num_rates - supp_rates_len;
1393 if (ext_rates_len > 0) {
c604b9f2
JB		 1394 if (end - pos < 2 + ext_rates_len)
1395 goto out_err;
8e664fb3 1396 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1397 *pos++ = ext_rates_len;
1398 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1399 pos += ext_rates_len;
8e664fb3
JB		 1400 }
1401
2103dec1 1402 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1403 if (end - pos < 3)
1404 goto out_err;
651b5225
JM		 1405 *pos++ = WLAN_EID_DS_PARAMS;
1406 *pos++ = 1;
2103dec1
SW		 1407 *pos++ = ieee80211_frequency_to_channel(
1408 chandef->chan->center_freq);
651b5225
JM		 1409 }
1410
8e664fb3
JB		 1411 /* insert custom IEs that go before HT */
1412 if (ie && ie_len) {
1413 static const u8 before_ht[] = {
1414 WLAN_EID_SSID,
1415 WLAN_EID_SUPP_RATES,
1416 WLAN_EID_REQUEST,
1417 WLAN_EID_EXT_SUPP_RATES,
1418 WLAN_EID_DS_PARAMS,
1419 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1420 };
1421 noffset = ieee80211_ie_split(ie, ie_len,
1422 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1423 *offset);
1424 if (end - pos < noffset - *offset)
c604b9f2 1425 goto out_err;
c56ef672
DS		 1426 memcpy(pos, ie + *offset, noffset - *offset);
1427 pos += noffset - *offset;
1428 *offset = noffset;
de95a54b
JB		 1429 }
1430
c604b9f2
JB		 1431 if (sband->ht_cap.ht_supported) {
1432 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1433 goto out_err;
ef96a842
BG		 1434 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1435 sband->ht_cap.cap);
c604b9f2 1436 }
5ef2d41a 1437
de95a54b
JB		 1438 /*
1439 * If adding more here, adjust code in main.c
1440 * that calculates local->scan_ies_len.
1441 */
1442
4d952300 1443 /* insert custom IEs that go before VHT */
8e664fb3 1444 if (ie && ie_len) {
4d952300
JB		 1445 static const u8 before_vht[] = {
1446 WLAN_EID_SSID,
1447 WLAN_EID_SUPP_RATES,
1448 WLAN_EID_REQUEST,
1449 WLAN_EID_EXT_SUPP_RATES,
1450 WLAN_EID_DS_PARAMS,
1451 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1452 WLAN_EID_HT_CAPABILITY,
1453 WLAN_EID_BSS_COEX_2040,
1454 WLAN_EID_EXT_CAPABILITY,
1455 WLAN_EID_SSID_LIST,
1456 WLAN_EID_CHANNEL_USAGE,
1457 WLAN_EID_INTERWORKING,
1458 /* mesh ID can't happen here */
1459 /* 60 GHz can't happen here right now */
1460 };
1461 noffset = ieee80211_ie_split(ie, ie_len,
1462 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1463 *offset);
1464 if (end - pos < noffset - *offset)
c604b9f2 1465 goto out_err;
c56ef672
DS		 1466 memcpy(pos, ie + *offset, noffset - *offset);
1467 pos += noffset - *offset;
1468 *offset = noffset;
de95a54b
JB		 1469 }
1470
40a11ca8
JB		 1471 /* Check if any channel in this sband supports at least 80 MHz */
1472 for (i = 0; i < sband->n_channels; i++) {
1473 if (!(sband->channels[i].flags & IEEE80211_CHAN_NO_80MHZ)) {
1474 have_80mhz = true;
1475 break;
1476 }
1477 }
1478
1479 if (sband->vht_cap.vht_supported && have_80mhz) {
c604b9f2
JB		 1480 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1481 goto out_err;
ba0afa2f
MP		 1482 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1483 sband->vht_cap.cap);
c604b9f2 1484 }
ba0afa2f 1485
c604b9f2
JB		 1486 return pos - buffer;
1487 out_err:
1488 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1489 return pos - buffer;
1490}
1491
c56ef672
DS		 1492int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1493 size_t buffer_len,
1494 struct ieee80211_scan_ies *ie_desc,
1495 const u8 *ie, size_t ie_len,
1496 u8 bands_used, u32 *rate_masks,
1497 struct cfg80211_chan_def *chandef)
1498{
1499 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1500 int i;
1501
1502 memset(ie_desc, 0, sizeof(*ie_desc));
1503
1504 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1505 if (bands_used & BIT(i)) {
1506 pos += ieee80211_build_preq_ies_band(local,
1507 buffer + pos,
1508 buffer_len - pos,
1509 ie, ie_len, i,
1510 rate_masks[i],
1511 chandef,
1512 &custom_ie_offset);
1513 ie_desc->ies[i] = buffer + old_pos;
1514 ie_desc->len[i] = pos - old_pos;
1515 old_pos = pos;
1516 }
1517 }
1518
1519 /* add any remaining custom IEs */
1520 if (ie && ie_len) {
1521 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1522 "not enough space for preq custom IEs\n"))
1523 return pos;
1524 memcpy(buffer + pos, ie + custom_ie_offset,
1525 ie_len - custom_ie_offset);
1526 ie_desc->common_ies = buffer + pos;
1527 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1528 pos += ie_len - custom_ie_offset;
1529 }
1530
1531 return pos;
1532};
1533
a619a4c0 1534struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
a344d677
JB		 1535 const u8 *src, const u8 *dst,
1536 u32 ratemask,
6b77863b 1537 struct ieee80211_channel *chan,
a619a4c0 1538 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1539 const u8 *ie, size_t ie_len,
1540 bool directed)
46900298
JB		 1541{
1542 struct ieee80211_local *local = sdata->local;
2103dec1 1543 struct cfg80211_chan_def chandef;
46900298
JB		 1544 struct sk_buff *skb;
1545 struct ieee80211_mgmt *mgmt;
b9a9ada1 1546 int ies_len;
c56ef672
DS		 1547 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1548 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1549
a806c558
PS		 1550 /*
1551 * Do not send DS Channel parameter for directed probe requests
1552 * in order to maximize the chance that we get a response. Some
1553 * badly-behaved APs don't respond when this parameter is included.
1554 */
2103dec1 1555 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1556 if (directed)
2103dec1 1557 chandef.chan = NULL;
a806c558 1558 else
2103dec1 1559 chandef.chan = chan;
651b5225 1560
a344d677
JB		 1561 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1562 100 + ie_len);
5b2bbf75 1563 if (!skb)
b9a9ada1
JB		 1564 return NULL;
1565
c56ef672 1566 rate_masks[chan->band] = ratemask;
b9a9ada1 1567 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1568 skb_tailroom(skb), &dummy_ie_desc,
1569 ie, ie_len, BIT(chan->band),
1570 rate_masks, &chandef);
b9a9ada1 1571 skb_put(skb, ies_len);
7c12ce8b 1572
46900298 1573 if (dst) {
7c12ce8b 1574 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1575 memcpy(mgmt->da, dst, ETH_ALEN);
1576 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1577 }
46900298 1578
62ae67be 1579 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1580
a619a4c0
JO		 1581 return skb;
1582}
1583
a344d677
JB		 1584void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1585 const u8 *src, const u8 *dst,
a619a4c0 1586 const u8 *ssid, size_t ssid_len,
a806c558 1587 const u8 *ie, size_t ie_len,
1672c0e3 1588 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1589 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1590{
1591 struct sk_buff *skb;
1592
a344d677 1593 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
6b77863b 1594 ssid, ssid_len,
85a237fe 1595 ie, ie_len, directed);
aad14ceb 1596 if (skb) {
1672c0e3 1597 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1598 if (scan)
1599 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1600 else
1601 ieee80211_tx_skb(sdata, skb);
aad14ceb 1602 }
46900298
JB		 1603}
1604
2103dec1 1605u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1606 struct ieee802_11_elems *elems,
9ebb61a2 1607 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1608{
1609 struct ieee80211_supported_band *sband;
46900298 1610 size_t num_rates;
2103dec1
SW		 1611 u32 supp_rates, rate_flags;
1612 int i, j, shift;
1613 sband = sdata->local->hw.wiphy->bands[band];
1614
1615 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1616 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1617
4ee73f33
MK		 1618 if (WARN_ON(!sband))
1619 return 1;
46900298 1620
46900298
JB		 1621 num_rates = sband->n_bitrates;
1622 supp_rates = 0;
1623 for (i = 0; i < elems->supp_rates_len +
1624 elems->ext_supp_rates_len; i++) {
1625 u8 rate = 0;
1626 int own_rate;
9ebb61a2 1627 bool is_basic;
46900298
JB		 1628 if (i < elems->supp_rates_len)
1629 rate = elems->supp_rates[i];
1630 else if (elems->ext_supp_rates)
1631 rate = elems->ext_supp_rates
1632 [i - elems->supp_rates_len];
1633 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1634 is_basic = !!(rate & 0x80);
1635
1636 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1637 continue;
1638
1639 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1640 int brate;
1641 if ((rate_flags & sband->bitrates[j].flags)
1642 != rate_flags)
1643 continue;
1644
1645 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1646 1 << shift);
1647
1648 if (brate == own_rate) {
46900298 1649 supp_rates |= BIT(j);
9ebb61a2
AN		 1650 if (basic_rates && is_basic)
1651 *basic_rates |= BIT(j);
1652 }
1653 }
46900298
JB		 1654 }
1655 return supp_rates;
1656}
f2753ddb 1657
84f6a01c
JB		 1658void ieee80211_stop_device(struct ieee80211_local *local)
1659{
1660 ieee80211_led_radio(local, false);
67408c8c 1661 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1662
1663 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1664
1665 flush_workqueue(local->workqueue);
678f415f 1666 drv_stop(local);
84f6a01c
JB		 1667}
1668
f6837ba8
JB		 1669static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1670{
1671 struct ieee80211_sub_if_data *sdata;
1672 struct ieee80211_chanctx *ctx;
1673
1674 /*
1675 * We get here if during resume the device can't be restarted properly.
1676 * We might also get here if this happens during HW reset, which is a
1677 * slightly different situation and we need to drop all connections in
1678 * the latter case.
1679 *
1680 * Ask cfg80211 to turn off all interfaces, this will result in more
1681 * warnings but at least we'll then get into a clean stopped state.
1682 */
1683
1684 local->resuming = false;
1685 local->suspended = false;
1686 local->started = false;
1687
1688 /* scheduled scan clearly can't be running any more, but tell
1689 * cfg80211 and clear local state
1690 */
1691 ieee80211_sched_scan_end(local);
1692
1693 list_for_each_entry(sdata, &local->interfaces, list)
1694 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1695
1696 /* Mark channel contexts as not being in the driver any more to avoid
1697 * removing them from the driver during the shutdown process...
1698 */
1699 mutex_lock(&local->chanctx_mtx);
1700 list_for_each_entry(ctx, &local->chanctx_list, list)
1701 ctx->driver_present = false;
1702 mutex_unlock(&local->chanctx_mtx);
1703
1704 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1705}
1706
153a5fc4
SG		 1707static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1708 struct ieee80211_sub_if_data *sdata)
1709{
1710 struct ieee80211_chanctx_conf *conf;
1711 struct ieee80211_chanctx *ctx;
1712
1713 if (!local->use_chanctx)
1714 return;
1715
1716 mutex_lock(&local->chanctx_mtx);
1717 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1718 lockdep_is_held(&local->chanctx_mtx));
1719 if (conf) {
1720 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1721 drv_assign_vif_chanctx(local, sdata, ctx);
1722 }
1723 mutex_unlock(&local->chanctx_mtx);
1724}
1725
f2753ddb
JB		 1726int ieee80211_reconfig(struct ieee80211_local *local)
1727{
1728 struct ieee80211_hw *hw = &local->hw;
1729 struct ieee80211_sub_if_data *sdata;
55de908a 1730 struct ieee80211_chanctx *ctx;
f2753ddb 1731 struct sta_info *sta;
2683d65b 1732 int res, i;
d888130a 1733 bool reconfig_due_to_wowlan = false;
d43c6b6e 1734 struct ieee80211_sub_if_data *sched_scan_sdata;
6ea0a69c 1735 struct cfg80211_sched_scan_request *sched_scan_req;
d43c6b6e 1736 bool sched_scan_stopped = false;
d888130a 1737
8f21b0ad 1738#ifdef CONFIG_PM
ceb99fe0
JB		 1739 if (local->suspended)
1740 local->resuming = true;
f2753ddb 1741
eecc4800 1742 if (local->wowlan) {
eecc4800 1743 res = drv_resume(local);
27b3eb9c 1744 local->wowlan = false;
eecc4800
JB		 1745 if (res < 0) {
1746 local->resuming = false;
1747 return res;
1748 }
1749 if (res == 0)
1750 goto wake_up;
1751 WARN_ON(res > 1);
1752 /*
1753 * res is 1, which means the driver requested
1754 * to go through a regular reset on wakeup.
1755 */
d888130a 1756 reconfig_due_to_wowlan = true;
eecc4800
JB		 1757 }
1758#endif
94f9b97b
JB		 1759 /* everything else happens only if HW was up & running */
1760 if (!local->open_count)
1761 goto wake_up;
f2753ddb 1762
94f9b97b
JB		 1763 /*
1764 * Upon resume hardware can sometimes be goofy due to
1765 * various platform / driver / bus issues, so restarting
1766 * the device may at times not work immediately. Propagate
1767 * the error.
1768 */
1769 res = drv_start(local);
1770 if (res) {
f6837ba8
JB		 1771 if (local->suspended)
1772 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1773 else
1774 WARN(1, "Hardware became unavailable during restart.\n");
1775 ieee80211_handle_reconfig_failure(local);
94f9b97b 1776 return res;
f2753ddb
JB		 1777 }
1778
7f281975
YAP		 1779 /* setup fragmentation threshold */
1780 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1781
1782 /* setup RTS threshold */
1783 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1784
1785 /* reset coverage class */
1786 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1787
94f9b97b
JB		 1788 ieee80211_led_radio(local, true);
1789 ieee80211_mod_tpt_led_trig(local,
1790 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1791
f2753ddb 1792 /* add interfaces */
4b6f1dd6
JB		 1793 sdata = rtnl_dereference(local->monitor_sdata);
1794 if (sdata) {
3c3e21e7
JB		 1795 /* in HW restart it exists already */
1796 WARN_ON(local->resuming);
4b6f1dd6
JB		 1797 res = drv_add_interface(local, sdata);
1798 if (WARN_ON(res)) {
0c2bef46 1799 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1800 synchronize_net();
1801 kfree(sdata);
1802 }
1803 }
1804
f2753ddb
JB		 1805 list_for_each_entry(sdata, &local->interfaces, list) {
1806 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1807 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1808 ieee80211_sdata_running(sdata))
7b7eab6f 1809 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1810 }
1811
55de908a 1812 /* add channel contexts */
f0dea9c7
AS		 1813 if (local->use_chanctx) {
1814 mutex_lock(&local->chanctx_mtx);
1815 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1816 if (ctx->replace_state !=
1817 IEEE80211_CHANCTX_REPLACES_OTHER)
1818 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1819 mutex_unlock(&local->chanctx_mtx);
55de908a 1820
7df180f7
ZG		 1821 list_for_each_entry(sdata, &local->interfaces, list) {
1822 if (!ieee80211_sdata_running(sdata))
1823 continue;
1824 ieee80211_assign_chanctx(local, sdata);
1825 }
6352c87f 1826
7df180f7
ZG		 1827 sdata = rtnl_dereference(local->monitor_sdata);
1828 if (sdata && ieee80211_sdata_running(sdata))
1829 ieee80211_assign_chanctx(local, sdata);
1830 }
fe5f2559 1831
f2753ddb 1832 /* add STAs back */
34e89507
JB		 1833 mutex_lock(&local->sta_mtx);
1834 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1835 enum ieee80211_sta_state state;
f09603a2 1836
2e8d397e
AN		 1837 if (!sta->uploaded)
1838 continue;
1839
1840 /* AP-mode stations will be added later */
1841 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1842 continue;
1843
1844 for (state = IEEE80211_STA_NOTEXIST;
1845 state < sta->sta_state; state++)
1846 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1847 state + 1));
f2753ddb 1848 }
34e89507 1849 mutex_unlock(&local->sta_mtx);
f2753ddb 1850
2683d65b 1851 /* reconfigure tx conf */
54bcbc69
JB		 1852 if (hw->queues >= IEEE80211_NUM_ACS) {
1853 list_for_each_entry(sdata, &local->interfaces, list) {
1854 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1855 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1856 !ieee80211_sdata_running(sdata))
1857 continue;
f6f3def3 1858
54bcbc69
JB		 1859 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1860 drv_conf_tx(local, sdata, i,
1861 &sdata->tx_conf[i]);
1862 }
f6f3def3 1863 }
2683d65b 1864
f2753ddb
JB		 1865 /* reconfigure hardware */
1866 ieee80211_hw_config(local, ~0);
1867
f2753ddb 1868 ieee80211_configure_filter(local);
f2753ddb
JB		 1869
1870 /* Finally also reconfigure all the BSS information */
1871 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1872 u32 changed;
1873
9607e6b6 1874 if (!ieee80211_sdata_running(sdata))
f2753ddb 1875 continue;
ac8dd506
JB		 1876
1877 /* common change flags for all interface types */
1878 changed = BSS_CHANGED_ERP_CTS_PROT |
1879 BSS_CHANGED_ERP_PREAMBLE |
1880 BSS_CHANGED_ERP_SLOT |
1881 BSS_CHANGED_HT |
1882 BSS_CHANGED_BASIC_RATES |
1883 BSS_CHANGED_BEACON_INT |
1884 BSS_CHANGED_BSSID |
4ced3f74 1885 BSS_CHANGED_CQM |
55de47f6 1886 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1887 BSS_CHANGED_IDLE |
1888 BSS_CHANGED_TXPOWER;
ac8dd506 1889
f2753ddb
JB		 1890 switch (sdata->vif.type) {
1891 case NL80211_IFTYPE_STATION:
0d392e93 1892 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1893 BSS_CHANGED_ARP_FILTER |
1894 BSS_CHANGED_PS;
c65dd147 1895
989c6505
AB		 1896 /* Re-send beacon info report to the driver */
1897 if (sdata->u.mgd.have_beacon)
1898 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1899
8d61ffa5 1900 sdata_lock(sdata);
ac8dd506 1901 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1902 sdata_unlock(sdata);
ac8dd506 1903 break;
6e0bd6c3 1904 case NL80211_IFTYPE_OCB:
239281f8
RL		 1905 changed |= BSS_CHANGED_OCB;
1906 ieee80211_bss_info_change_notify(sdata, changed);
6e0bd6c3 1907 break;
f2753ddb 1908 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1909 changed |= BSS_CHANGED_IBSS;
1910 /* fall through */
f2753ddb 1911 case NL80211_IFTYPE_AP:
339afbf4 1912 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1913
1041638f 1914 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1915 changed |= BSS_CHANGED_AP_PROBE_RESP;
1916
1041638f
JB		 1917 if (rcu_access_pointer(sdata->u.ap.beacon))
1918 drv_start_ap(local, sdata);
1919 }
1920
7827493b 1921 /* fall through */
f2753ddb 1922 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1923 if (sdata->vif.bss_conf.enable_beacon) {
1924 changed |= BSS_CHANGED_BEACON |
1925 BSS_CHANGED_BEACON_ENABLED;
1926 ieee80211_bss_info_change_notify(sdata, changed);
1927 }
f2753ddb
JB		 1928 break;
1929 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1930 case NL80211_IFTYPE_AP_VLAN:
1931 case NL80211_IFTYPE_MONITOR:
98104fde 1932 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1933 /* nothing to do */
f142c6b9 1934 break;
f2753ddb 1935 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1936 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1937 case NL80211_IFTYPE_P2P_CLIENT:
1938 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1939 WARN_ON(1);
1940 break;
1941 }
1942 }
1943
8e1b23b9
ES		 1944 ieee80211_recalc_ps(local, -1);
1945
6e1b1b24
EP		 1946 /*
1947 * The sta might be in psm against the ap (e.g. because
1948 * this was the state before a hw restart), so we
1949 * explicitly send a null packet in order to make sure
1950 * it'll sync against the ap (and get out of psm).
1951 */
1952 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1953 list_for_each_entry(sdata, &local->interfaces, list) {
1954 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1955 continue;
20f544ee
JB		 1956 if (!sdata->u.mgd.associated)
1957 continue;
6e1b1b24
EP		 1958
1959 ieee80211_send_nullfunc(local, sdata, 0);
1960 }
1961 }
1962
2e8d397e
AN		 1963 /* APs are now beaconing, add back stations */
1964 mutex_lock(&local->sta_mtx);
1965 list_for_each_entry(sta, &local->sta_list, list) {
1966 enum ieee80211_sta_state state;
1967
1968 if (!sta->uploaded)
1969 continue;
1970
1971 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1972 continue;
1973
1974 for (state = IEEE80211_STA_NOTEXIST;
1975 state < sta->sta_state; state++)
1976 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1977 state + 1));
1978 }
1979 mutex_unlock(&local->sta_mtx);
1980
7b21aea0
ES		 1981 /* add back keys */
1982 list_for_each_entry(sdata, &local->interfaces, list)
1983 if (ieee80211_sdata_running(sdata))
1984 ieee80211_enable_keys(sdata);
1985
c6209488 1986 wake_up:
04800ada
AN		 1987 local->in_reconfig = false;
1988 barrier();
1989
3c3e21e7
JB		 1990 if (local->monitors == local->open_count && local->monitors > 0)
1991 ieee80211_add_virtual_monitor(local);
1992
2a419056
JB		 1993 /*
1994 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1995 * sessions can be established after a resume.
1996 *
1997 * Also tear down aggregation sessions since reconfiguring
1998 * them in a hardware restart scenario is not easily done
1999 * right now, and the hardware will have lost information
2000 * about the sessions, but we and the AP still think they
2001 * are active. This is really a workaround though.
2002 */
74e2bd1f 2003 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 2004 mutex_lock(&local->sta_mtx);
2005
2006 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 2007 ieee80211_sta_tear_down_BA_sessions(
2008 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 2009 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 2010 }
2a419056
JB		 2011
2012 mutex_unlock(&local->sta_mtx);
74e2bd1f 2013 }
74e2bd1f 2014
445ea4e8 2015 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 2016 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2017 false);
f2753ddb 2018
32769814
AN		 2019 /*
2020 * Reconfigure sched scan if it was interrupted by FW restart or
2021 * suspend.
2022 */
2023 mutex_lock(&local->mtx);
2024 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2025 lockdep_is_held(&local->mtx));
6ea0a69c
JB		 2026 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2027 lockdep_is_held(&local->mtx));
2028 if (sched_scan_sdata && sched_scan_req)
32769814
AN		 2029 /*
2030 * Sched scan stopped, but we don't want to report it. Instead,
2031 * we're trying to reschedule.
2032 */
2033 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
6ea0a69c 2034 sched_scan_req))
32769814
AN		 2035 sched_scan_stopped = true;
2036 mutex_unlock(&local->mtx);
2037
2038 if (sched_scan_stopped)
e669ba2d 2039 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 2040
5bb644a0
JB		 2041 /*
2042 * If this is for hw restart things are still running.
2043 * We may want to change that later, however.
2044 */
8f21b0ad 2045 if (!local->suspended || reconfig_due_to_wowlan)
cf2c92d8 2046 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
8f21b0ad
JB		 2047
2048 if (!local->suspended)
5bb644a0
JB		 2049 return 0;
2050
2051#ifdef CONFIG_PM
ceb99fe0 2052 /* first set suspended false, then resuming */
5bb644a0 2053 local->suspended = false;
ceb99fe0
JB		 2054 mb();
2055 local->resuming = false;
5bb644a0 2056
cf2c92d8
EP		 2057 if (!reconfig_due_to_wowlan)
2058 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2059
b8360ab8
JB		 2060 list_for_each_entry(sdata, &local->interfaces, list) {
2061 if (!ieee80211_sdata_running(sdata))
2062 continue;
2063 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2064 ieee80211_sta_restart(sdata);
2065 }
2066
26d59535 2067 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 2068#else
2069 WARN_ON(1);
2070#endif
d43c6b6e 2071
f2753ddb
JB		 2072 return 0;
2073}
42935eca 2074
95acac61
JB		 2075void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2076{
2077 struct ieee80211_sub_if_data *sdata;
2078 struct ieee80211_local *local;
2079 struct ieee80211_key *key;
2080
2081 if (WARN_ON(!vif))
2082 return;
2083
2084 sdata = vif_to_sdata(vif);
2085 local = sdata->local;
2086
2087 if (WARN_ON(!local->resuming))
2088 return;
2089
2090 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2091 return;
2092
2093 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2094
2095 mutex_lock(&local->key_mtx);
2096 list_for_each_entry(key, &sdata->key_list, list)
2097 key->flags |= KEY_FLAG_TAINTED;
2098 mutex_unlock(&local->key_mtx);
2099}
2100EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2101
04ecd257 2102void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2103{
04ecd257
JB		 2104 struct ieee80211_local *local = sdata->local;
2105 struct ieee80211_chanctx_conf *chanctx_conf;
2106 struct ieee80211_chanctx *chanctx;
025e6be2 2107
04ecd257 2108 mutex_lock(&local->chanctx_mtx);
0f78231b 2109
04ecd257
JB		 2110 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2111 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2112
04ecd257 2113 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2114 goto unlock;
0f78231b 2115
04ecd257
JB		 2116 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2117 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2118 unlock:
04ecd257 2119 mutex_unlock(&local->chanctx_mtx);
0f78231b 2120}
8e664fb3 2121
21f659bf
EP		 2122void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2123{
2124 struct ieee80211_local *local = sdata->local;
2125 struct ieee80211_chanctx_conf *chanctx_conf;
2126 struct ieee80211_chanctx *chanctx;
2127
2128 mutex_lock(&local->chanctx_mtx);
2129
2130 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2131 lockdep_is_held(&local->chanctx_mtx));
2132
2133 if (WARN_ON_ONCE(!chanctx_conf))
2134 goto unlock;
2135
2136 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2137 ieee80211_recalc_chanctx_min_def(local, chanctx);
2138 unlock:
2139 mutex_unlock(&local->chanctx_mtx);
2140}
2141
8e664fb3
JB		 2142static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2143{
2144 int i;
2145
2146 for (i = 0; i < n_ids; i++)
2147 if (ids[i] == id)
2148 return true;
2149 return false;
2150}
2151
8ed28747
JB		 2152size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2153 const u8 *ids, int n_ids,
2154 const u8 *after_ric, int n_after_ric,
2155 size_t offset)
8e664fb3
JB		 2156{
2157 size_t pos = offset;
2158
8ed28747
JB		 2159 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2160 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2161 pos += 2 + ies[pos + 1];
2162
2163 while (pos < ielen &&
2164 !ieee80211_id_in_list(after_ric, n_after_ric,
2165 ies[pos]))
2166 pos += 2 + ies[pos + 1];
2167 } else {
2168 pos += 2 + ies[pos + 1];
2169 }
2170 }
8e664fb3
JB		 2171
2172 return pos;
2173}
8ed28747
JB		 2174
2175size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2176 const u8 *ids, int n_ids, size_t offset)
2177{
2178 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2179}
a7f3a768 2180EXPORT_SYMBOL(ieee80211_ie_split);
8e664fb3
JB		 2181
2182size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2183{
2184 size_t pos = offset;
2185
2186 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2187 pos += 2 + ies[pos + 1];
2188
2189 return pos;
2190}
615f7b9b
MV		 2191
2192static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2193 int rssi_min_thold,
2194 int rssi_max_thold)
2195{
2196 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2197
2198 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2199 return;
2200
2201 /*
2202 * Scale up threshold values before storing it, as the RSSI averaging
2203 * algorithm uses a scaled up value as well. Change this scaling
2204 * factor if the RSSI averaging algorithm changes.
2205 */
2206 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2207 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2208}
2209
2210void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2211 int rssi_min_thold,
2212 int rssi_max_thold)
2213{
2214 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2215
2216 WARN_ON(rssi_min_thold == rssi_max_thold ||
2217 rssi_min_thold > rssi_max_thold);
2218
2219 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2220 rssi_max_thold);
2221}
2222EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2223
2224void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2225{
2226 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2227
2228 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2229}
2230EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2231
ef96a842 2232u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2233 u16 cap)
2234{
2235 __le16 tmp;
2236
2237 *pos++ = WLAN_EID_HT_CAPABILITY;
2238 *pos++ = sizeof(struct ieee80211_ht_cap);
2239 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2240
2241 /* capability flags */
2242 tmp = cpu_to_le16(cap);
2243 memcpy(pos, &tmp, sizeof(u16));
2244 pos += sizeof(u16);
2245
2246 /* AMPDU parameters */
ef96a842
BG		 2247 *pos++ = ht_cap->ampdu_factor |
2248 (ht_cap->ampdu_density <<
42e7aa77
AS		 2249 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2250
2251 /* MCS set */
ef96a842
BG		 2252 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2253 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2254
2255 /* extended capabilities */
2256 pos += sizeof(__le16);
2257
2258 /* BF capabilities */
2259 pos += sizeof(__le32);
2260
2261 /* antenna selection */
2262 pos += sizeof(u8);
2263
2264 return pos;
2265}
2266
ba0afa2f 2267u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2268 u32 cap)
ba0afa2f
MP		 2269{
2270 __le32 tmp;
2271
2272 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2273 *pos++ = sizeof(struct ieee80211_vht_cap);
2274 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2275
2276 /* capability flags */
2277 tmp = cpu_to_le32(cap);
2278 memcpy(pos, &tmp, sizeof(u32));
2279 pos += sizeof(u32);
2280
2281 /* VHT MCS set */
2282 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2283 pos += sizeof(vht_cap->vht_mcs);
2284
2285 return pos;
2286}
2287
074d46d1 2288u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2289 const struct cfg80211_chan_def *chandef,
431e3154 2290 u16 prot_mode)
42e7aa77 2291{
074d46d1 2292 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2293 /* Build HT Information */
074d46d1
JB		 2294 *pos++ = WLAN_EID_HT_OPERATION;
2295 *pos++ = sizeof(struct ieee80211_ht_operation);
2296 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2297 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2298 chandef->chan->center_freq);
2299 switch (chandef->width) {
2300 case NL80211_CHAN_WIDTH_160:
2301 case NL80211_CHAN_WIDTH_80P80:
2302 case NL80211_CHAN_WIDTH_80:
2303 case NL80211_CHAN_WIDTH_40:
2304 if (chandef->center_freq1 > chandef->chan->center_freq)
2305 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2306 else
2307 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2308 break;
42e7aa77 2309 default:
074d46d1 2310 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2311 break;
2312 }
aee286c2 2313 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2314 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2315 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2316 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2317
431e3154 2318 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2319 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2320
2321 /* It seems that Basic MCS set and Supported MCS set
2322 are identical for the first 10 bytes */
074d46d1
JB		 2323 memset(&ht_oper->basic_set, 0, 16);
2324 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2325
074d46d1 2326 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2327}
2328
4bf88530 2329void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2330 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2331 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2332{
2333 enum nl80211_channel_type channel_type;
2334
4bf88530
JB		 2335 if (!ht_oper) {
2336 cfg80211_chandef_create(chandef, control_chan,
2337 NL80211_CHAN_NO_HT);
2338 return;
2339 }
42e7aa77 2340
074d46d1 2341 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2342 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2343 channel_type = NL80211_CHAN_HT20;
2344 break;
2345 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2346 channel_type = NL80211_CHAN_HT40PLUS;
2347 break;
2348 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2349 channel_type = NL80211_CHAN_HT40MINUS;
2350 break;
2351 default:
2352 channel_type = NL80211_CHAN_NO_HT;
2353 }
2354
4bf88530 2355 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2356}
2357
2103dec1
SW		 2358int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2359 const struct ieee80211_supported_band *sband,
2360 const u8 *srates, int srates_len, u32 *rates)
2361{
2362 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2363 int shift = ieee80211_chandef_get_shift(chandef);
2364 struct ieee80211_rate *br;
2365 int brate, rate, i, j, count = 0;
2366
2367 *rates = 0;
2368
2369 for (i = 0; i < srates_len; i++) {
2370 rate = srates[i] & 0x7f;
2371
2372 for (j = 0; j < sband->n_bitrates; j++) {
2373 br = &sband->bitrates[j];
2374 if ((rate_flags & br->flags) != rate_flags)
2375 continue;
2376
2377 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2378 if (brate == rate) {
2379 *rates |= BIT(j);
2380 count++;
2381 break;
2382 }
2383 }
2384 }
2385 return count;
2386}
2387
fc8a7321 2388int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2389 struct sk_buff *skb, bool need_basic,
2390 enum ieee80211_band band)
768db343 2391{
768db343
AN		 2392 struct ieee80211_local *local = sdata->local;
2393 struct ieee80211_supported_band *sband;
2103dec1 2394 int rate, shift;
768db343 2395 u8 i, rates, *pos;
fc8a7321 2396 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2397 u32 rate_flags;
768db343 2398
2103dec1
SW		 2399 shift = ieee80211_vif_get_shift(&sdata->vif);
2400 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2401 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2402 rates = 0;
2403 for (i = 0; i < sband->n_bitrates; i++) {
2404 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2405 continue;
2406 rates++;
2407 }
768db343
AN		 2408 if (rates > 8)
2409 rates = 8;
2410
2411 if (skb_tailroom(skb) < rates + 2)
2412 return -ENOMEM;
2413
2414 pos = skb_put(skb, rates + 2);
2415 *pos++ = WLAN_EID_SUPP_RATES;
2416 *pos++ = rates;
2417 for (i = 0; i < rates; i++) {
657c3e0c 2418 u8 basic = 0;
2103dec1
SW		 2419 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2420 continue;
2421
657c3e0c
AN		 2422 if (need_basic && basic_rates & BIT(i))
2423 basic = 0x80;
768db343 2424 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2425 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2426 5 * (1 << shift));
2427 *pos++ = basic | (u8) rate;
768db343
AN		 2428 }
2429
2430 return 0;
2431}
2432
fc8a7321 2433int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2434 struct sk_buff *skb, bool need_basic,
2435 enum ieee80211_band band)
768db343 2436{
768db343
AN		 2437 struct ieee80211_local *local = sdata->local;
2438 struct ieee80211_supported_band *sband;
cc63ec76 2439 int rate, shift;
768db343 2440 u8 i, exrates, *pos;
fc8a7321 2441 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2442 u32 rate_flags;
2443
2444 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2445 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2446
6b77863b 2447 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2448 exrates = 0;
2449 for (i = 0; i < sband->n_bitrates; i++) {
2450 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2451 continue;
2452 exrates++;
2453 }
2454
768db343
AN		 2455 if (exrates > 8)
2456 exrates -= 8;
2457 else
2458 exrates = 0;
2459
2460 if (skb_tailroom(skb) < exrates + 2)
2461 return -ENOMEM;
2462
2463 if (exrates) {
2464 pos = skb_put(skb, exrates + 2);
2465 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2466 *pos++ = exrates;
2467 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2468 u8 basic = 0;
2103dec1
SW		 2469 if ((rate_flags & sband->bitrates[i].flags)
2470 != rate_flags)
2471 continue;
657c3e0c
AN		 2472 if (need_basic && basic_rates & BIT(i))
2473 basic = 0x80;
2103dec1
SW		 2474 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2475 5 * (1 << shift));
2476 *pos++ = basic | (u8) rate;
768db343
AN		 2477 }
2478 }
2479 return 0;
2480}
1dae27f8
WYG		 2481
2482int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2483{
2484 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2485 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2486
be6bcabc
WYG		 2487 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2488 /* non-managed type inferfaces */
2489 return 0;
2490 }
3a7bba64 2491 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2492}
0d8a0a17 2493EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2494
2495u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2496{
2497 if (!mcs)
2498 return 1;
2499
2500 /* TODO: consider rx_highest */
2501
2502 if (mcs->rx_mask[3])
2503 return 4;
2504 if (mcs->rx_mask[2])
2505 return 3;
2506 if (mcs->rx_mask[1])
2507 return 2;
2508 return 1;
2509}
f4bda337
TP		 2510
2511/**
2512 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2513 * @local: mac80211 hw info struct
2514 * @status: RX status
2515 * @mpdu_len: total MPDU length (including FCS)
2516 * @mpdu_offset: offset into MPDU to calculate timestamp at
2517 *
2518 * This function calculates the RX timestamp at the given MPDU offset, taking
2519 * into account what the RX timestamp was. An offset of 0 will just normalize
2520 * the timestamp to TSF at beginning of MPDU reception.
2521 */
2522u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2523 struct ieee80211_rx_status *status,
2524 unsigned int mpdu_len,
2525 unsigned int mpdu_offset)
2526{
2527 u64 ts = status->mactime;
2528 struct rate_info ri;
2529 u16 rate;
2530
2531 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2532 return 0;
2533
2534 memset(&ri, 0, sizeof(ri));
2535
2536 /* Fill cfg80211 rate info */
2537 if (status->flag & RX_FLAG_HT) {
2538 ri.mcs = status->rate_idx;
2539 ri.flags |= RATE_INFO_FLAGS_MCS;
2540 if (status->flag & RX_FLAG_40MHZ)
2541 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2542 if (status->flag & RX_FLAG_SHORT_GI)
2543 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2544 } else if (status->flag & RX_FLAG_VHT) {
2545 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2546 ri.mcs = status->rate_idx;
2547 ri.nss = status->vht_nss;
2548 if (status->flag & RX_FLAG_40MHZ)
2549 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
1b8d242a 2550 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
5614618e 2551 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
1b8d242a 2552 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
5614618e 2553 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
1b8d242a 2554 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
5614618e
JB		 2555 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2556 if (status->flag & RX_FLAG_SHORT_GI)
2557 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2558 } else {
2559 struct ieee80211_supported_band *sband;
2103dec1
SW		 2560 int shift = 0;
2561 int bitrate;
2562
2563 if (status->flag & RX_FLAG_10MHZ)
2564 shift = 1;
2565 if (status->flag & RX_FLAG_5MHZ)
2566 shift = 2;
f4bda337
TP		 2567
2568 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2569 bitrate = sband->bitrates[status->rate_idx].bitrate;
2570 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2571 }
2572
2573 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2574 if (WARN_ONCE(!rate,
2575 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2576 status->flag, status->rate_idx, status->vht_nss))
2577 return 0;
f4bda337
TP		 2578
2579 /* rewind from end of MPDU */
2580 if (status->flag & RX_FLAG_MACTIME_END)
2581 ts -= mpdu_len * 8 * 10 / rate;
2582
2583 ts += mpdu_offset * 8 * 10 / rate;
2584
2585 return ts;
2586}
164eb02d
SW		 2587
2588void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2589{
2590 struct ieee80211_sub_if_data *sdata;
d2859df5 2591 struct cfg80211_chan_def chandef;
164eb02d 2592
34a3740d 2593 mutex_lock(&local->mtx);
164eb02d
SW		 2594 mutex_lock(&local->iflist_mtx);
2595 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2596 /* it might be waiting for the local->mtx, but then
2597 * by the time it gets it, sdata->wdev.cac_started
2598 * will no longer be true
2599 */
2600 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2601
2602 if (sdata->wdev.cac_started) {
d2859df5 2603 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2604 ieee80211_vif_release_channel(sdata);
2605 cfg80211_cac_event(sdata->dev,
d2859df5 2606 &chandef,
164eb02d
SW		 2607 NL80211_RADAR_CAC_ABORTED,
2608 GFP_KERNEL);
2609 }
2610 }
2611 mutex_unlock(&local->iflist_mtx);
34a3740d 2612 mutex_unlock(&local->mtx);
164eb02d
SW		 2613}
2614
2615void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2616{
2617 struct ieee80211_local *local =
2618 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2619 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2620 struct ieee80211_chanctx *ctx;
2621 int num_chanctx = 0;
2622
2623 mutex_lock(&local->chanctx_mtx);
2624 list_for_each_entry(ctx, &local->chanctx_list, list) {
2625 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2626 continue;
2627
2628 num_chanctx++;
2629 chandef = ctx->conf.def;
2630 }
2631 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2632
2633 ieee80211_dfs_cac_cancel(local);
2634
486cf4c0
MK		 2635 if (num_chanctx > 1)
2636 /* XXX: multi-channel is not supported yet */
164eb02d 2637 WARN_ON(1);
84a3d1c9 2638 else
164eb02d 2639 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2640}
2641
2642void ieee80211_radar_detected(struct ieee80211_hw *hw)
2643{
2644 struct ieee80211_local *local = hw_to_local(hw);
2645
2646 trace_api_radar_detected(local);
2647
2648 ieee80211_queue_work(hw, &local->radar_detected_work);
2649}
2650EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2651
2652u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2653{
2654 u32 ret;
2655 int tmp;
2656
2657 switch (c->width) {
2658 case NL80211_CHAN_WIDTH_20:
2659 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2660 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2661 break;
2662 case NL80211_CHAN_WIDTH_40:
2663 c->width = NL80211_CHAN_WIDTH_20;
2664 c->center_freq1 = c->chan->center_freq;
2665 ret = IEEE80211_STA_DISABLE_40MHZ |
2666 IEEE80211_STA_DISABLE_VHT;
2667 break;
2668 case NL80211_CHAN_WIDTH_80:
2669 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2670 /* n_P40 */
2671 tmp /= 2;
2672 /* freq_P40 */
2673 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2674 c->width = NL80211_CHAN_WIDTH_40;
2675 ret = IEEE80211_STA_DISABLE_VHT;
2676 break;
2677 case NL80211_CHAN_WIDTH_80P80:
2678 c->center_freq2 = 0;
2679 c->width = NL80211_CHAN_WIDTH_80;
2680 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2681 IEEE80211_STA_DISABLE_160MHZ;
2682 break;
2683 case NL80211_CHAN_WIDTH_160:
2684 /* n_P20 */
2685 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2686 /* n_P80 */
2687 tmp /= 4;
2688 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2689 c->width = NL80211_CHAN_WIDTH_80;
2690 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2691 IEEE80211_STA_DISABLE_160MHZ;
2692 break;
2693 default:
2694 case NL80211_CHAN_WIDTH_20_NOHT:
2695 WARN_ON_ONCE(1);
2696 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2697 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2698 break;
2699 case NL80211_CHAN_WIDTH_5:
2700 case NL80211_CHAN_WIDTH_10:
2701 WARN_ON_ONCE(1);
2702 /* keep c->width */
2703 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2704 break;
2705 }
2706
2707 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2708
2709 return ret;
2710}
687da132
EG		 2711
2712/*
2713 * Returns true if smps_mode_new is strictly more restrictive than
2714 * smps_mode_old.
2715 */
2716bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2717 enum ieee80211_smps_mode smps_mode_new)
2718{
2719 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2720 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2721 return false;
2722
2723 switch (smps_mode_old) {
2724 case IEEE80211_SMPS_STATIC:
2725 return false;
2726 case IEEE80211_SMPS_DYNAMIC:
2727 return smps_mode_new == IEEE80211_SMPS_STATIC;
2728 case IEEE80211_SMPS_OFF:
2729 return smps_mode_new != IEEE80211_SMPS_OFF;
2730 default:
2731 WARN_ON(1);
2732 }
2733
2734 return false;
2735}
c6da674a
CYY		 2736
2737int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2738 struct cfg80211_csa_settings *csa_settings)
2739{
2740 struct sk_buff *skb;
2741 struct ieee80211_mgmt *mgmt;
2742 struct ieee80211_local *local = sdata->local;
2743 int freq;
2744 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2745 sizeof(mgmt->u.action.u.chan_switch);
2746 u8 *pos;
2747
2748 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2749 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2750 return -EOPNOTSUPP;
2751
2752 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2753 5 + /* channel switch announcement element */
2754 3 + /* secondary channel offset element */
2755 8); /* mesh channel switch parameters element */
2756 if (!skb)
2757 return -ENOMEM;
2758
2759 skb_reserve(skb, local->tx_headroom);
2760 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2761 memset(mgmt, 0, hdr_len);
2762 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2763 IEEE80211_STYPE_ACTION);
2764
2765 eth_broadcast_addr(mgmt->da);
2766 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2767 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2768 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2769 } else {
2770 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2771 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2772 }
2773 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2774 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2775 pos = skb_put(skb, 5);
2776 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2777 *pos++ = 3; /* IE length */
2778 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2779 freq = csa_settings->chandef.chan->center_freq;
2780 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2781 *pos++ = csa_settings->count; /* count */
2782
2783 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2784 enum nl80211_channel_type ch_type;
2785
2786 skb_put(skb, 3);
2787 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2788 *pos++ = 1; /* IE length */
2789 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2790 if (ch_type == NL80211_CHAN_HT40PLUS)
2791 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2792 else
2793 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2794 }
2795
2796 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2797 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2798
2799 skb_put(skb, 8);
2800 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2801 *pos++ = 6; /* IE length */
2802 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2803 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2804 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2805 *pos++ |= csa_settings->block_tx ?
2806 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2807 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2808 pos += 2;
ca91dc97 2809 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2810 pos += 2;
c6da674a
CYY		 2811 }
2812
2813 ieee80211_tx_skb(sdata, skb);
2814 return 0;
2815}
2475b1cc
MS		 2816
2817bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2818{
2819 return !(cs == NULL || cs->cipher == 0 ||
2820 cs->hdr_len < cs->pn_len + cs->pn_off ||
2821 cs->hdr_len <= cs->key_idx_off ||
2822 cs->key_idx_shift > 7 ||
2823 cs->key_idx_mask == 0);
2824}
2825
2826bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2827{
2828 int i;
2829
2830 /* Ensure we have enough iftype bitmap space for all iftype values */
2831 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2832
2833 for (i = 0; i < n; i++)
2834 if (!ieee80211_cs_valid(&cs[i]))
2835 return false;
2836
2837 return true;
2838}
2839
2840const struct ieee80211_cipher_scheme *
2841ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2842 enum nl80211_iftype iftype)
2843{
2844 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2845 int n = local->hw.n_cipher_schemes;
2846 int i;
2847 const struct ieee80211_cipher_scheme *cs = NULL;
2848
2849 for (i = 0; i < n; i++) {
2850 if (l[i].cipher == cipher) {
2851 cs = &l[i];
2852 break;
2853 }
2854 }
2855
2856 if (!cs || !(cs->iftype & BIT(iftype)))
2857 return NULL;
2858
2859 return cs;
2860}
2861
2862int ieee80211_cs_headroom(struct ieee80211_local *local,
2863 struct cfg80211_crypto_settings *crypto,
2864 enum nl80211_iftype iftype)
2865{
2866 const struct ieee80211_cipher_scheme *cs;
2867 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2868 int i;
2869
2870 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2871 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2872 iftype);
2873
2874 if (cs && headroom < cs->hdr_len)
2875 headroom = cs->hdr_len;
2876 }
2877
2878 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2879 if (cs && headroom < cs->hdr_len)
2880 headroom = cs->hdr_len;
2881
2882 return headroom;
2883}
a7022e65
FF		 2884
2885static bool
2886ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2887{
2888 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2889 int skip;
2890
2891 if (end > 0)
2892 return false;
2893
2894 /* End time is in the past, check for repetitions */
2895 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2896 if (data->count[i] < 255) {
2897 if (data->count[i] <= skip) {
2898 data->count[i] = 0;
2899 return false;
2900 }
2901
2902 data->count[i] -= skip;
2903 }
2904
2905 data->desc[i].start += skip * data->desc[i].interval;
2906
2907 return true;
2908}
2909
2910static bool
2911ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2912 s32 *offset)
2913{
2914 bool ret = false;
2915 int i;
2916
2917 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2918 s32 cur;
2919
2920 if (!data->count[i])
2921 continue;
2922
2923 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2924 ret = true;
2925
2926 cur = data->desc[i].start - tsf;
2927 if (cur > *offset)
2928 continue;
2929
2930 cur = data->desc[i].start + data->desc[i].duration - tsf;
2931 if (cur > *offset)
2932 *offset = cur;
2933 }
2934
2935 return ret;
2936}
2937
2938static u32
2939ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2940{
2941 s32 offset = 0;
2942 int tries = 0;
2943 /*
2944 * arbitrary limit, used to avoid infinite loops when combined NoA
2945 * descriptors cover the full time period.
2946 */
2947 int max_tries = 5;
2948
2949 ieee80211_extend_absent_time(data, tsf, &offset);
2950 do {
2951 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2952 break;
2953
2954 tries++;
2955 } while (tries < max_tries);
2956
2957 return offset;
2958}
2959
2960void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2961{
2962 u32 next_offset = BIT(31) - 1;
2963 int i;
2964
2965 data->absent = 0;
2966 data->has_next_tsf = false;
2967 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2968 s32 start;
2969
2970 if (!data->count[i])
2971 continue;
2972
2973 ieee80211_extend_noa_desc(data, tsf, i);
2974 start = data->desc[i].start - tsf;
2975 if (start <= 0)
2976 data->absent |= BIT(i);
2977
2978 if (next_offset > start)
2979 next_offset = start;
2980
2981 data->has_next_tsf = true;
2982 }
2983
2984 if (data->absent)
2985 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2986
2987 data->next_tsf = tsf + next_offset;
2988}
2989EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2990
2991int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2992 struct ieee80211_noa_data *data, u32 tsf)
2993{
2994 int ret = 0;
2995 int i;
2996
2997 memset(data, 0, sizeof(*data));
2998
2999 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3000 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3001
3002 if (!desc->count || !desc->duration)
3003 continue;
3004
3005 data->count[i] = desc->count;
3006 data->desc[i].start = le32_to_cpu(desc->start_time);
3007 data->desc[i].duration = le32_to_cpu(desc->duration);
3008 data->desc[i].interval = le32_to_cpu(desc->interval);
3009
3010 if (data->count[i] > 1 &&
3011 data->desc[i].interval < data->desc[i].duration)
3012 continue;
3013
3014 ieee80211_extend_noa_desc(data, tsf, i);
3015 ret++;
3016 }
3017
3018 if (ret)
3019 ieee80211_update_p2p_noa(data, tsf);
3020
3021 return ret;
3022}
3023EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 3024
3025void ieee80211_recalc_dtim(struct ieee80211_local *local,
3026 struct ieee80211_sub_if_data *sdata)
3027{
3028 u64 tsf = drv_get_tsf(local, sdata);
3029 u64 dtim_count = 0;
3030 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3031 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3032 struct ps_data *ps;
3033 u8 bcns_from_dtim;
3034
3035 if (tsf == -1ULL || !beacon_int || !dtim_period)
3036 return;
3037
3038 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3039 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3040 if (!sdata->bss)
3041 return;
3042
3043 ps = &sdata->bss->ps;
3044 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3045 ps = &sdata->u.mesh.ps;
3046 } else {
3047 return;
3048 }
3049
3050 /*
3051 * actually finds last dtim_count, mac80211 will update in
3052 * __beacon_add_tim().
3053 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3054 */
3055 do_div(tsf, beacon_int);
3056 bcns_from_dtim = do_div(tsf, dtim_period);
3057 /* just had a DTIM */
3058 if (!bcns_from_dtim)
3059 dtim_count = 0;
3060 else
3061 dtim_count = dtim_period - bcns_from_dtim;
3062
3063 ps->dtim_count = dtim_count;
3064}
73de86a3 3065
71e6195e
MK		 3066static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3067 struct ieee80211_chanctx *ctx)
3068{
3069 struct ieee80211_sub_if_data *sdata;
3070 u8 radar_detect = 0;
3071
3072 lockdep_assert_held(&local->chanctx_mtx);
3073
3074 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3075 return 0;
3076
3077 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3078 if (sdata->reserved_radar_required)
3079 radar_detect |= BIT(sdata->reserved_chandef.width);
3080
3081 /*
3082 * An in-place reservation context should not have any assigned vifs
3083 * until it replaces the other context.
3084 */
3085 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3086 !list_empty(&ctx->assigned_vifs));
3087
3088 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3089 if (sdata->radar_required)
3090 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3091
3092 return radar_detect;
3093}
3094
73de86a3
LC		 3095int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3096 const struct cfg80211_chan_def *chandef,
3097 enum ieee80211_chanctx_mode chanmode,
3098 u8 radar_detect)
3099{
3100 struct ieee80211_local *local = sdata->local;
3101 struct ieee80211_sub_if_data *sdata_iter;
3102 enum nl80211_iftype iftype = sdata->wdev.iftype;
3103 int num[NUM_NL80211_IFTYPES];
3104 struct ieee80211_chanctx *ctx;
b6a55015 3105 int num_different_channels = 0;
73de86a3
LC		 3106 int total = 1;
3107
3108 lockdep_assert_held(&local->chanctx_mtx);
3109
3110 if (WARN_ON(hweight32(radar_detect) > 1))
3111 return -EINVAL;
3112
b6a55015
LC		 3113 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3114 !chandef->chan))
73de86a3
LC		 3115 return -EINVAL;
3116
b6a55015
LC		 3117 if (chandef)
3118 num_different_channels = 1;
3119
73de86a3
LC		 3120 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3121 return -EINVAL;
3122
3123 /* Always allow software iftypes */
3124 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3125 if (radar_detect)
3126 return -EINVAL;
3127 return 0;
3128 }
3129
3130 memset(num, 0, sizeof(num));
3131
3132 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3133 num[iftype] = 1;
3134
3135 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3136 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3137 continue;
71e6195e 3138 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3139 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3140 num_different_channels++;
3141 continue;
3142 }
b6a55015 3143 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3144 cfg80211_chandef_compatible(chandef,
3145 &ctx->conf.def))
3146 continue;
3147 num_different_channels++;
3148 }
3149
3150 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3151 struct wireless_dev *wdev_iter;
3152
3153 wdev_iter = &sdata_iter->wdev;
3154
3155 if (sdata_iter == sdata ||
3156 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3157 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3158 continue;
3159
3160 num[wdev_iter->iftype]++;
3161 total++;
3162 }
3163
3164 if (total == 1 && !radar_detect)
3165 return 0;
3166
3167 return cfg80211_check_combinations(local->hw.wiphy,
3168 num_different_channels,
3169 radar_detect, num);
3170}
6fa001bc
MK		 3171
3172static void
3173ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3174 void *data)
3175{
3176 u32 *max_num_different_channels = data;
3177
3178 *max_num_different_channels = max(*max_num_different_channels,
3179 c->num_different_channels);
3180}
3181
3182int ieee80211_max_num_channels(struct ieee80211_local *local)
3183{
3184 struct ieee80211_sub_if_data *sdata;
3185 int num[NUM_NL80211_IFTYPES] = {};
3186 struct ieee80211_chanctx *ctx;
3187 int num_different_channels = 0;
3188 u8 radar_detect = 0;
3189 u32 max_num_different_channels = 1;
3190 int err;
3191
3192 lockdep_assert_held(&local->chanctx_mtx);
3193
3194 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3195 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3196 continue;
3197
6fa001bc
MK		 3198 num_different_channels++;
3199
71e6195e 3200 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3201 }
3202
3203 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3204 num[sdata->wdev.iftype]++;
3205
3206 err = cfg80211_iter_combinations(local->hw.wiphy,
3207 num_different_channels, radar_detect,
3208 num, ieee80211_iter_max_chans,
3209 &max_num_different_channels);
3210 if (err < 0)
3211 return err;
3212
3213 return max_num_different_channels;
3214}
40b861a0
AN		 3215
3216u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3217{
3218 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3219 *buf++ = 7; /* len */
3220 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3221 *buf++ = 0x50;
3222 *buf++ = 0xf2;
3223 *buf++ = 2; /* WME */
3224 *buf++ = 0; /* WME info */
3225 *buf++ = 1; /* WME ver */
3226 *buf++ = qosinfo; /* U-APSD no in use */
3227
3228 return buf;
3229}
Linux 6.x block layer and io_uring tree(s)