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Merge remote-tracking branches 'asoc/topic/intel', 'asoc/topic/kirkwood', 'asoc/topic...
[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>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
bc3b2d7f 16#include <linux/export.h>
c2d1560a
JB		 17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
c2d1560a 22#include <linux/bitmap.h>
dd76986b 23#include <linux/crc32.h>
881d966b 24#include <net/net_namespace.h>
c2d1560a 25#include <net/cfg80211.h>
dabeb344 26#include <net/rtnetlink.h>
c2d1560a
JB		 27
28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7 30#include "rate.h"
ee385855 31#include "mesh.h"
c2d1560a 32#include "wme.h"
f2753ddb 33#include "led.h"
fffd0934 34#include "wep.h"
c2d1560a
JB		 35
36/* privid for wiphys to determine whether they belong to us or not */
8a47cea7 37const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
c2d1560a 38
9a95371a
LR		 39struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
c2d1560a 48
71364716 49u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
05c914fe 50 enum nl80211_iftype type)
c2d1560a 51{
a494bb1c 52 __le16 fc = hdr->frame_control;
c2d1560a 53
98f0b0a3
RR		 54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
c2d1560a
JB		 56 return NULL;
57
a494bb1c 58 if (ieee80211_is_data(fc)) {
98f0b0a3
RR		 59 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
a494bb1c
HH		 61
62 if (ieee80211_has_a4(fc))
c2d1560a 63 return NULL;
a494bb1c
HH		 64 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
c2d1560a 67 return hdr->addr2;
a494bb1c
HH		 68
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
98f0b0a3
RR		 73 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
c2d1560a 75 return hdr->addr3;
a494bb1c
HH		 76 }
77
78 if (ieee80211_is_ctl(fc)) {
f359d3fe 79 if (ieee80211_is_pspoll(fc))
c2d1560a 80 return hdr->addr1;
a494bb1c
HH		 81
82 if (ieee80211_is_back_req(fc)) {
71364716 83 switch (type) {
05c914fe 84 case NL80211_IFTYPE_STATION:
71364716 85 return hdr->addr2;
05c914fe
JB		 86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
71364716
RR		 88 return hdr->addr1;
89 default:
a494bb1c 90 break; /* fall through to the return */
71364716
RR		 91 }
92 }
c2d1560a
JB		 93 }
94
95 return NULL;
96}
97
5cf121c3 98void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
c2d1560a 99{
252b86c4 100 struct sk_buff *skb;
2de8e0d9
JB		 101 struct ieee80211_hdr *hdr;
102
252b86c4 103 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9
JB		 104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
252b86c4 106 }
c2d1560a
JB		 107}
108
4ee73f33 109int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
438b61b7
SW		 110 int rate, int erp, int short_preamble,
111 int shift)
c2d1560a
JB		 112{
113 int dur;
114
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
118 * also include SIFS.
119 *
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
438b61b7
SW		 122 *
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
c2d1560a
JB		 125 */
126
4ee73f33 127 if (band == IEEE80211_BAND_5GHZ || erp) {
c2d1560a
JB		 128 /*
129 * OFDM:
130 *
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
135 *
136 * T_SYM = 4 usec
438b61b7 137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
c2d1560a
JB		 138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
140 */
c2d1560a 141 dur = 16; /* SIFS + signal ext */
438b61b7
SW		 142 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
438b61b7
SW		 144
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
148 */
149 dur *= 1 << shift;
2103dec1
SW		 150
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
153 */
154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
155 4 * rate); /* T_SYM x N_SYM */
c2d1560a
JB		 156 } else {
157 /*
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
161 *
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
166 */
167 dur = 10; /* aSIFSTime = 10 usec */
168 dur += short_preamble ? (72 + 24) : (144 + 48);
169
170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
171 }
172
173 return dur;
174}
175
176/* Exported duration function for driver use */
32bfd35d
JB		 177__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
178 struct ieee80211_vif *vif,
4ee73f33 179 enum ieee80211_band band,
8318d78a
JB		 180 size_t frame_len,
181 struct ieee80211_rate *rate)
c2d1560a 182{
25d834e1 183 struct ieee80211_sub_if_data *sdata;
c2d1560a 184 u16 dur;
438b61b7 185 int erp, shift = 0;
25d834e1 186 bool short_preamble = false;
c2d1560a 187
8318d78a 188 erp = 0;
25d834e1
JB		 189 if (vif) {
190 sdata = vif_to_sdata(vif);
bda3933a 191 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 192 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
193 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 194 shift = ieee80211_vif_get_shift(vif);
25d834e1 195 }
8318d78a 196
4ee73f33 197 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
438b61b7 198 short_preamble, shift);
c2d1560a
JB		 199
200 return cpu_to_le16(dur);
201}
202EXPORT_SYMBOL(ieee80211_generic_frame_duration);
203
32bfd35d
JB		 204__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif, size_t frame_len,
e039fa4a 206 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 207{
208 struct ieee80211_local *local = hw_to_local(hw);
209 struct ieee80211_rate *rate;
25d834e1 210 struct ieee80211_sub_if_data *sdata;
471b3efd 211 bool short_preamble;
2103dec1 212 int erp, shift = 0, bitrate;
c2d1560a 213 u16 dur;
2e92e6f2
JB		 214 struct ieee80211_supported_band *sband;
215
4ee73f33 216 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 217
25d834e1 218 short_preamble = false;
7e9ed188 219
e039fa4a 220 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a
JB		 221
222 erp = 0;
25d834e1
JB		 223 if (vif) {
224 sdata = vif_to_sdata(vif);
bda3933a 225 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 226 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
227 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 228 shift = ieee80211_vif_get_shift(vif);
25d834e1 229 }
c2d1560a 230
2103dec1
SW		 231 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
232
c2d1560a 233 /* CTS duration */
2103dec1 234 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 235 erp, short_preamble, shift);
c2d1560a 236 /* Data frame duration */
2103dec1 237 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 238 erp, short_preamble, shift);
c2d1560a 239 /* ACK duration */
2103dec1 240 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 241 erp, short_preamble, shift);
c2d1560a
JB		 242
243 return cpu_to_le16(dur);
244}
245EXPORT_SYMBOL(ieee80211_rts_duration);
246
32bfd35d
JB		 247__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
248 struct ieee80211_vif *vif,
c2d1560a 249 size_t frame_len,
e039fa4a 250 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 251{
252 struct ieee80211_local *local = hw_to_local(hw);
253 struct ieee80211_rate *rate;
25d834e1 254 struct ieee80211_sub_if_data *sdata;
471b3efd 255 bool short_preamble;
2103dec1 256 int erp, shift = 0, bitrate;
c2d1560a 257 u16 dur;
2e92e6f2
JB		 258 struct ieee80211_supported_band *sband;
259
4ee73f33 260 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 261
25d834e1 262 short_preamble = false;
7e9ed188 263
e039fa4a 264 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a 265 erp = 0;
25d834e1
JB		 266 if (vif) {
267 sdata = vif_to_sdata(vif);
bda3933a 268 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 269 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
270 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 271 shift = ieee80211_vif_get_shift(vif);
25d834e1 272 }
c2d1560a 273
2103dec1
SW		 274 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
275
c2d1560a 276 /* Data frame duration */
2103dec1 277 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 278 erp, short_preamble, shift);
e039fa4a 279 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
c2d1560a 280 /* ACK duration */
2103dec1 281 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 282 erp, short_preamble, shift);
c2d1560a
JB		 283 }
284
285 return cpu_to_le16(dur);
286}
287EXPORT_SYMBOL(ieee80211_ctstoself_duration);
288
3a25a8c8
JB		 289void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
290{
291 struct ieee80211_sub_if_data *sdata;
a6f38ac3
JB		 292 int n_acs = IEEE80211_NUM_ACS;
293
294 if (local->hw.queues < IEEE80211_NUM_ACS)
295 n_acs = 1;
3a25a8c8
JB		 296
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
298 int ac;
299
f142c6b9
JB		 300 if (!sdata->dev)
301 continue;
302
3a25a8c8
JB		 303 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
304 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
305 continue;
306
a6f38ac3 307 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 308 int ac_queue = sdata->vif.hw_queue[ac];
309
310 if (ac_queue == queue ||
311 (sdata->vif.cab_queue == queue &&
312 local->queue_stop_reasons[ac_queue] == 0 &&
313 skb_queue_empty(&local->pending[ac_queue])))
314 netif_wake_subqueue(sdata->dev, ac);
315 }
316 }
317}
318
ce7c9111
KV		 319static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
320 enum queue_stop_reason reason)
c2d1560a
JB		 321{
322 struct ieee80211_local *local = hw_to_local(hw);
323
b5878a2d
JB		 324 trace_wake_queue(local, queue, reason);
325
e4e72fb4
JB		 326 if (WARN_ON(queue >= hw->queues))
327 return;
ce7c9111 328
ada15125
JB		 329 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
330 return;
331
96f5e66e
JB		 332 __clear_bit(reason, &local->queue_stop_reasons[queue]);
333
334 if (local->queue_stop_reasons[queue] != 0)
335 /* someone still has this queue stopped */
336 return;
337
7236fe29
JB		 338 if (skb_queue_empty(&local->pending[queue])) {
339 rcu_read_lock();
3a25a8c8 340 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 341 rcu_read_unlock();
342 } else
3b8d81e0 343 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 344}
ce7c9111 345
96f5e66e
JB		 346void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
ce7c9111
KV		 348{
349 struct ieee80211_local *local = hw_to_local(hw);
350 unsigned long flags;
351
352 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
353 __ieee80211_wake_queue(hw, queue, reason);
354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
355}
356
357void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
358{
359 ieee80211_wake_queue_by_reason(hw, queue,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER);
361}
c2d1560a
JB		 362EXPORT_SYMBOL(ieee80211_wake_queue);
363
ce7c9111
KV		 364static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
365 enum queue_stop_reason reason)
c2d1560a
JB		 366{
367 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 368 struct ieee80211_sub_if_data *sdata;
a6f38ac3 369 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 370
b5878a2d
JB		 371 trace_stop_queue(local, queue, reason);
372
e4e72fb4
JB		 373 if (WARN_ON(queue >= hw->queues))
374 return;
96f5e66e 375
ada15125
JB		 376 if (test_bit(reason, &local->queue_stop_reasons[queue]))
377 return;
378
2a577d98 379 __set_bit(reason, &local->queue_stop_reasons[queue]);
cf0277e7 380
a6f38ac3
JB		 381 if (local->hw.queues < IEEE80211_NUM_ACS)
382 n_acs = 1;
383
cf0277e7 384 rcu_read_lock();
3a25a8c8
JB		 385 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
386 int ac;
387
f142c6b9
JB		 388 if (!sdata->dev)
389 continue;
390
a6f38ac3 391 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 392 if (sdata->vif.hw_queue[ac] == queue ||
393 sdata->vif.cab_queue == queue)
394 netif_stop_subqueue(sdata->dev, ac);
395 }
396 }
cf0277e7 397 rcu_read_unlock();
c2d1560a 398}
ce7c9111 399
96f5e66e
JB		 400void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
401 enum queue_stop_reason reason)
ce7c9111
KV		 402{
403 struct ieee80211_local *local = hw_to_local(hw);
404 unsigned long flags;
405
406 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
407 __ieee80211_stop_queue(hw, queue, reason);
408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
409}
410
411void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
412{
413 ieee80211_stop_queue_by_reason(hw, queue,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER);
415}
c2d1560a
JB		 416EXPORT_SYMBOL(ieee80211_stop_queue);
417
8f77f384
JB		 418void ieee80211_add_pending_skb(struct ieee80211_local *local,
419 struct sk_buff *skb)
420{
421 struct ieee80211_hw *hw = &local->hw;
422 unsigned long flags;
a7bc376c 423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 424 int queue = info->hw_queue;
a7bc376c
JB		 425
426 if (WARN_ON(!info->control.vif)) {
d4fa14cd 427 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 428 return;
429 }
8f77f384
JB		 430
431 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
432 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
3b8d81e0 433 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 434 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
436}
437
e3685e03
JB		 438void ieee80211_add_pending_skbs(struct ieee80211_local *local,
439 struct sk_buff_head *skbs)
8f77f384
JB		 440{
441 struct ieee80211_hw *hw = &local->hw;
442 struct sk_buff *skb;
443 unsigned long flags;
b0b97a8a 444 int queue, i;
8f77f384
JB		 445
446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 447 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 448 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
449
450 if (WARN_ON(!info->control.vif)) {
d4fa14cd 451 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 452 continue;
453 }
454
3a25a8c8 455 queue = info->hw_queue;
4644ae89
JB		 456
457 __ieee80211_stop_queue(hw, queue,
458 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
459
3b8d81e0 460 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 461 }
462
3b8d81e0 463 for (i = 0; i < hw->queues; i++)
8f77f384
JB		 464 __ieee80211_wake_queue(hw, i,
465 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
8f77f384 466 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 467}
468
ce7c9111 469void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8
JB		 470 unsigned long queues,
471 enum queue_stop_reason reason)
c2d1560a 472{
ce7c9111
KV		 473 struct ieee80211_local *local = hw_to_local(hw);
474 unsigned long flags;
c2d1560a
JB		 475 int i;
476
ce7c9111
KV		 477 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
478
445ea4e8 479 for_each_set_bit(i, &queues, hw->queues)
ce7c9111
KV		 480 __ieee80211_stop_queue(hw, i, reason);
481
482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
483}
484
485void ieee80211_stop_queues(struct ieee80211_hw *hw)
486{
445ea4e8 487 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
ce7c9111 488 IEEE80211_QUEUE_STOP_REASON_DRIVER);
c2d1560a
JB		 489}
490EXPORT_SYMBOL(ieee80211_stop_queues);
491
92ab8535
TW		 492int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
493{
494 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 495 unsigned long flags;
496 int ret;
96f5e66e 497
e4e72fb4
JB		 498 if (WARN_ON(queue >= hw->queues))
499 return true;
96f5e66e 500
3b8d81e0 501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 502 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
503 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 504 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
505 return ret;
92ab8535
TW		 506}
507EXPORT_SYMBOL(ieee80211_queue_stopped);
508
ce7c9111 509void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 510 unsigned long queues,
ce7c9111 511 enum queue_stop_reason reason)
c2d1560a 512{
ce7c9111
KV		 513 struct ieee80211_local *local = hw_to_local(hw);
514 unsigned long flags;
c2d1560a
JB		 515 int i;
516
ce7c9111
KV		 517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
518
445ea4e8 519 for_each_set_bit(i, &queues, hw->queues)
ce7c9111
KV		 520 __ieee80211_wake_queue(hw, i, reason);
521
522 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
523}
524
525void ieee80211_wake_queues(struct ieee80211_hw *hw)
526{
445ea4e8
JB		 527 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
528 IEEE80211_QUEUE_STOP_REASON_DRIVER);
c2d1560a
JB		 529}
530EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 531
39ecc01d
JB		 532void ieee80211_flush_queues(struct ieee80211_local *local,
533 struct ieee80211_sub_if_data *sdata)
534{
535 u32 queues;
536
537 if (!local->ops->flush)
538 return;
539
540 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
541 int ac;
542
543 queues = 0;
544
545 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
546 queues |= BIT(sdata->vif.hw_queue[ac]);
547 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
548 queues |= BIT(sdata->vif.cab_queue);
549 } else {
550 /* all queues */
551 queues = BIT(local->hw.queues) - 1;
552 }
553
445ea4e8
JB		 554 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH);
556
77be2c54 557 drv_flush(local, sdata, queues, false);
445ea4e8
JB		 558
559 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH);
39ecc01d
JB		 561}
562
c7c71066
JB		 563static void __iterate_active_interfaces(struct ieee80211_local *local,
564 u32 iter_flags,
565 void (*iterator)(void *data, u8 *mac,
566 struct ieee80211_vif *vif),
567 void *data)
dabeb344 568{
dabeb344
JB		 569 struct ieee80211_sub_if_data *sdata;
570
c7c71066 571 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 572 switch (sdata->vif.type) {
05c914fe 573 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 574 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
575 continue;
576 break;
05c914fe 577 case NL80211_IFTYPE_AP_VLAN:
2f561feb 578 continue;
2ca27bcf 579 default:
2f561feb
ID		 580 break;
581 }
8b2c9824
JB		 582 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
583 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
584 continue;
9607e6b6 585 if (ieee80211_sdata_running(sdata))
47846c9b 586 iterator(data, sdata->vif.addr,
2f561feb
ID		 587 &sdata->vif);
588 }
589
c7c71066
JB		 590 sdata = rcu_dereference_check(local->monitor_sdata,
591 lockdep_is_held(&local->iflist_mtx) ||
592 lockdep_rtnl_is_held());
8b2c9824
JB		 593 if (sdata &&
594 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
595 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 596 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 597}
685fb72b 598
c7c71066
JB		 599void ieee80211_iterate_active_interfaces(
600 struct ieee80211_hw *hw, u32 iter_flags,
601 void (*iterator)(void *data, u8 *mac,
602 struct ieee80211_vif *vif),
603 void *data)
604{
605 struct ieee80211_local *local = hw_to_local(hw);
606
607 mutex_lock(&local->iflist_mtx);
608 __iterate_active_interfaces(local, iter_flags, iterator, data);
c771c9d8 609 mutex_unlock(&local->iflist_mtx);
2f561feb
ID		 610}
611EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
612
613void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 614 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 615 void (*iterator)(void *data, u8 *mac,
616 struct ieee80211_vif *vif),
617 void *data)
618{
619 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 620
e38bad47 621 rcu_read_lock();
c7c71066
JB		 622 __iterate_active_interfaces(local, iter_flags, iterator, data);
623 rcu_read_unlock();
624}
625EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 626
c7c71066
JB		 627void ieee80211_iterate_active_interfaces_rtnl(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
631 void *data)
632{
633 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 634
c7c71066 635 ASSERT_RTNL();
685fb72b 636
c7c71066 637 __iterate_active_interfaces(local, iter_flags, iterator, data);
dabeb344 638}
c7c71066 639EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 640
ad7e718c
JB		 641struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
642{
643 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
644
645 if (!ieee80211_sdata_running(sdata) ||
646 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
647 return NULL;
648 return &sdata->vif;
649}
650EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
651
42935eca
LR		 652/*
653 * Nothing should have been stuffed into the workqueue during
654 * the suspend->resume cycle. If this WARN is seen then there
655 * is a bug with either the driver suspend or something in
656 * mac80211 stuffing into the workqueue which we haven't yet
657 * cleared during mac80211's suspend cycle.
658 */
659static bool ieee80211_can_queue_work(struct ieee80211_local *local)
660{
ceb99fe0
JB		 661 if (WARN(local->suspended && !local->resuming,
662 "queueing ieee80211 work while going to suspend\n"))
663 return false;
42935eca
LR		 664
665 return true;
666}
667
668void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 if (!ieee80211_can_queue_work(local))
673 return;
674
675 queue_work(local->workqueue, work);
676}
677EXPORT_SYMBOL(ieee80211_queue_work);
678
679void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
680 struct delayed_work *dwork,
681 unsigned long delay)
682{
683 struct ieee80211_local *local = hw_to_local(hw);
684
685 if (!ieee80211_can_queue_work(local))
686 return;
687
688 queue_delayed_work(local->workqueue, dwork, delay);
689}
690EXPORT_SYMBOL(ieee80211_queue_delayed_work);
691
35d865af 692u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 693 struct ieee802_11_elems *elems,
694 u64 filter, u32 crc)
695{
696 size_t left = len;
35d865af 697 const u8 *pos = start;
dd76986b 698 bool calc_crc = filter != 0;
fcff4f10 699 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 700 const u8 *ie;
dd76986b 701
fcff4f10 702 bitmap_zero(seen_elems, 256);
dd76986b
JB		 703 memset(elems, 0, sizeof(*elems));
704 elems->ie_start = start;
705 elems->total_len = len;
706
707 while (left >= 2) {
708 u8 id, elen;
fcff4f10 709 bool elem_parse_failed;
dd76986b
JB		 710
711 id = *pos++;
712 elen = *pos++;
713 left -= 2;
714
fcff4f10
PS		 715 if (elen > left) {
716 elems->parse_error = true;
dd76986b 717 break;
fcff4f10
PS		 718 }
719
9690fb16
JB		 720 switch (id) {
721 case WLAN_EID_SSID:
722 case WLAN_EID_SUPP_RATES:
723 case WLAN_EID_FH_PARAMS:
724 case WLAN_EID_DS_PARAMS:
725 case WLAN_EID_CF_PARAMS:
726 case WLAN_EID_TIM:
727 case WLAN_EID_IBSS_PARAMS:
728 case WLAN_EID_CHALLENGE:
729 case WLAN_EID_RSN:
730 case WLAN_EID_ERP_INFO:
731 case WLAN_EID_EXT_SUPP_RATES:
732 case WLAN_EID_HT_CAPABILITY:
733 case WLAN_EID_HT_OPERATION:
734 case WLAN_EID_VHT_CAPABILITY:
735 case WLAN_EID_VHT_OPERATION:
736 case WLAN_EID_MESH_ID:
737 case WLAN_EID_MESH_CONFIG:
738 case WLAN_EID_PEER_MGMT:
739 case WLAN_EID_PREQ:
740 case WLAN_EID_PREP:
741 case WLAN_EID_PERR:
742 case WLAN_EID_RANN:
743 case WLAN_EID_CHANNEL_SWITCH:
744 case WLAN_EID_EXT_CHANSWITCH_ANN:
745 case WLAN_EID_COUNTRY:
746 case WLAN_EID_PWR_CONSTRAINT:
747 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 748 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 749 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 750 case WLAN_EID_CHAN_SWITCH_PARAM:
b2e506bf
JB		 751 /*
752 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
753 * that if the content gets bigger it might be needed more than once
754 */
9690fb16
JB		 755 if (test_bit(id, seen_elems)) {
756 elems->parse_error = true;
757 left -= elen;
758 pos += elen;
759 continue;
760 }
761 break;
fcff4f10 762 }
dd76986b
JB		 763
764 if (calc_crc && id < 64 && (filter & (1ULL << id)))
765 crc = crc32_be(crc, pos - 2, elen + 2);
766
fcff4f10
PS		 767 elem_parse_failed = false;
768
dd76986b
JB		 769 switch (id) {
770 case WLAN_EID_SSID:
771 elems->ssid = pos;
772 elems->ssid_len = elen;
773 break;
774 case WLAN_EID_SUPP_RATES:
775 elems->supp_rates = pos;
776 elems->supp_rates_len = elen;
777 break;
dd76986b 778 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 779 if (elen >= 1)
780 elems->ds_params = pos;
781 else
782 elem_parse_failed = true;
dd76986b 783 break;
dd76986b
JB		 784 case WLAN_EID_TIM:
785 if (elen >= sizeof(struct ieee80211_tim_ie)) {
786 elems->tim = (void *)pos;
787 elems->tim_len = elen;
fcff4f10
PS		 788 } else
789 elem_parse_failed = true;
dd76986b 790 break;
dd76986b
JB		 791 case WLAN_EID_CHALLENGE:
792 elems->challenge = pos;
793 elems->challenge_len = elen;
794 break;
795 case WLAN_EID_VENDOR_SPECIFIC:
796 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
797 pos[2] == 0xf2) {
798 /* Microsoft OUI (00:50:F2) */
799
800 if (calc_crc)
801 crc = crc32_be(crc, pos - 2, elen + 2);
802
441a33ba 803 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 804 /* OUI Type 2 - WMM IE */
805 if (pos[4] == 0) {
806 elems->wmm_info = pos;
807 elems->wmm_info_len = elen;
808 } else if (pos[4] == 1) {
809 elems->wmm_param = pos;
810 elems->wmm_param_len = elen;
811 }
812 }
813 }
814 break;
815 case WLAN_EID_RSN:
816 elems->rsn = pos;
817 elems->rsn_len = elen;
818 break;
819 case WLAN_EID_ERP_INFO:
1946bed9
JB		 820 if (elen >= 1)
821 elems->erp_info = pos;
822 else
823 elem_parse_failed = true;
dd76986b
JB		 824 break;
825 case WLAN_EID_EXT_SUPP_RATES:
826 elems->ext_supp_rates = pos;
827 elems->ext_supp_rates_len = elen;
828 break;
829 case WLAN_EID_HT_CAPABILITY:
830 if (elen >= sizeof(struct ieee80211_ht_cap))
831 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 832 else
833 elem_parse_failed = true;
dd76986b 834 break;
074d46d1
JB		 835 case WLAN_EID_HT_OPERATION:
836 if (elen >= sizeof(struct ieee80211_ht_operation))
837 elems->ht_operation = (void *)pos;
fcff4f10
PS		 838 else
839 elem_parse_failed = true;
dd76986b 840 break;
818255ea
MP		 841 case WLAN_EID_VHT_CAPABILITY:
842 if (elen >= sizeof(struct ieee80211_vht_cap))
843 elems->vht_cap_elem = (void *)pos;
844 else
845 elem_parse_failed = true;
846 break;
847 case WLAN_EID_VHT_OPERATION:
848 if (elen >= sizeof(struct ieee80211_vht_operation))
849 elems->vht_operation = (void *)pos;
850 else
851 elem_parse_failed = true;
852 break;
bee7f586
JB		 853 case WLAN_EID_OPMODE_NOTIF:
854 if (elen > 0)
855 elems->opmode_notif = pos;
856 else
857 elem_parse_failed = true;
858 break;
dd76986b
JB		 859 case WLAN_EID_MESH_ID:
860 elems->mesh_id = pos;
861 elems->mesh_id_len = elen;
862 break;
863 case WLAN_EID_MESH_CONFIG:
864 if (elen >= sizeof(struct ieee80211_meshconf_ie))
865 elems->mesh_config = (void *)pos;
fcff4f10
PS		 866 else
867 elem_parse_failed = true;
dd76986b
JB		 868 break;
869 case WLAN_EID_PEER_MGMT:
870 elems->peering = pos;
871 elems->peering_len = elen;
872 break;
3f52b7e3
MP		 873 case WLAN_EID_MESH_AWAKE_WINDOW:
874 if (elen >= 2)
875 elems->awake_window = (void *)pos;
876 break;
dd76986b
JB		 877 case WLAN_EID_PREQ:
878 elems->preq = pos;
879 elems->preq_len = elen;
880 break;
881 case WLAN_EID_PREP:
882 elems->prep = pos;
883 elems->prep_len = elen;
884 break;
885 case WLAN_EID_PERR:
886 elems->perr = pos;
887 elems->perr_len = elen;
888 break;
889 case WLAN_EID_RANN:
890 if (elen >= sizeof(struct ieee80211_rann_ie))
891 elems->rann = (void *)pos;
fcff4f10
PS		 892 else
893 elem_parse_failed = true;
dd76986b
JB		 894 break;
895 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 896 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
897 elem_parse_failed = true;
898 break;
899 }
900 elems->ch_switch_ie = (void *)pos;
dd76986b 901 break;
b4f286a1
JB		 902 case WLAN_EID_EXT_CHANSWITCH_ANN:
903 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
904 elem_parse_failed = true;
905 break;
906 }
907 elems->ext_chansw_ie = (void *)pos;
908 break;
85220d71
JB		 909 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
910 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
911 elem_parse_failed = true;
912 break;
913 }
914 elems->sec_chan_offs = (void *)pos;
915 break;
8f2535b9
CYY		 916 case WLAN_EID_CHAN_SWITCH_PARAM:
917 if (elen !=
918 sizeof(*elems->mesh_chansw_params_ie)) {
919 elem_parse_failed = true;
920 break;
921 }
922 elems->mesh_chansw_params_ie = (void *)pos;
923 break;
b2e506bf
JB		 924 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
925 if (!action ||
926 elen != sizeof(*elems->wide_bw_chansw_ie)) {
927 elem_parse_failed = true;
928 break;
929 }
930 elems->wide_bw_chansw_ie = (void *)pos;
931 break;
932 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
933 if (action) {
934 elem_parse_failed = true;
935 break;
936 }
937 /*
938 * This is a bit tricky, but as we only care about
939 * the wide bandwidth channel switch element, so
940 * just parse it out manually.
941 */
942 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
943 pos, elen);
944 if (ie) {
945 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
946 elems->wide_bw_chansw_ie =
947 (void *)(ie + 2);
948 else
949 elem_parse_failed = true;
950 }
951 break;
dd76986b
JB		 952 case WLAN_EID_COUNTRY:
953 elems->country_elem = pos;
954 elems->country_elem_len = elen;
955 break;
956 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 957 if (elen != 1) {
958 elem_parse_failed = true;
959 break;
960 }
dd76986b 961 elems->pwr_constr_elem = pos;
dd76986b
JB		 962 break;
963 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 964 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
965 elems->timeout_int = (void *)pos;
966 else
967 elem_parse_failed = true;
dd76986b
JB		 968 break;
969 default:
970 break;
971 }
972
fcff4f10
PS		 973 if (elem_parse_failed)
974 elems->parse_error = true;
975 else
5df45690 976 __set_bit(id, seen_elems);
fcff4f10 977
dd76986b
JB		 978 left -= elen;
979 pos += elen;
980 }
981
fcff4f10
PS		 982 if (left != 0)
983 elems->parse_error = true;
984
dd76986b
JB		 985 return crc;
986}
987
3abead59
JB		 988void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
989 bool bss_notify)
5825fe10
JB		 990{
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_tx_queue_params qparam;
55de908a 993 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 994 int ac;
a8ce8544 995 bool use_11b, enable_qos;
aa837e1d 996 int aCWmin, aCWmax;
5825fe10
JB		 997
998 if (!local->ops->conf_tx)
999 return;
1000
54bcbc69
JB		 1001 if (local->hw.queues < IEEE80211_NUM_ACS)
1002 return;
1003
5825fe10
JB		 1004 memset(&qparam, 0, sizeof(qparam));
1005
55de908a
JB		 1006 rcu_read_lock();
1007 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1008 use_11b = (chanctx_conf &&
4bf88530 1009 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1010 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1011 rcu_read_unlock();
5825fe10 1012
a8ce8544
SG		 1013 /*
1014 * By default disable QoS in STA mode for old access points, which do
1015 * not support 802.11e. New APs will provide proper queue parameters,
1016 * that we will configure later.
1017 */
1018 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1019
1f4ffde8
FZ		 1020 /* Set defaults according to 802.11-2007 Table 7-37 */
1021 aCWmax = 1023;
1022 if (use_11b)
1023 aCWmin = 31;
1024 else
1025 aCWmin = 15;
1026
1027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
1030 qparam.txop = 0;
1031 qparam.aifs = 2;
aa837e1d 1032
1f4ffde8
FZ		 1033 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1034 /* Update if QoS is enabled. */
a8ce8544
SG		 1035 if (enable_qos) {
1036 switch (ac) {
1037 case IEEE80211_AC_BK:
1038 qparam.cw_max = aCWmax;
1039 qparam.cw_min = aCWmin;
1040 qparam.txop = 0;
1041 qparam.aifs = 7;
1042 break;
1043 /* never happens but let's not leave undefined */
1044 default:
1045 case IEEE80211_AC_BE:
1046 qparam.cw_max = aCWmax;
1047 qparam.cw_min = aCWmin;
1048 qparam.txop = 0;
1049 qparam.aifs = 3;
1050 break;
1051 case IEEE80211_AC_VI:
1052 qparam.cw_max = aCWmin;
1053 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1054 if (use_11b)
1055 qparam.txop = 6016/32;
1056 else
1057 qparam.txop = 3008/32;
1058 qparam.aifs = 2;
1059 break;
1060 case IEEE80211_AC_VO:
1061 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1062 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1063 if (use_11b)
1064 qparam.txop = 3264/32;
1065 else
1066 qparam.txop = 1504/32;
1067 qparam.aifs = 2;
1068 break;
1069 }
aa837e1d 1070 }
5825fe10 1071
ab13315a
KV		 1072 qparam.uapsd = false;
1073
54bcbc69
JB		 1074 sdata->tx_conf[ac] = qparam;
1075 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1076 }
e1b3ec1a 1077
f142c6b9
JB		 1078 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1079 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1080 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1081 if (bss_notify)
1082 ieee80211_bss_info_change_notify(sdata,
1083 BSS_CHANGED_QOS);
d9734979 1084 }
5825fe10 1085}
e50db65c 1086
46900298 1087void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1088 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1089 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1090 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1091 u32 tx_flags)
46900298
JB		 1092{
1093 struct ieee80211_local *local = sdata->local;
1094 struct sk_buff *skb;
1095 struct ieee80211_mgmt *mgmt;
fffd0934 1096 int err;
46900298 1097
15e230ab 1098 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1099 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1100 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1101 if (!skb)
46900298 1102 return;
d15b8459 1103
744462a9 1104 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1105
1106 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1107 memset(mgmt, 0, 24 + 6);
1108 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1109 IEEE80211_STYPE_AUTH);
efa6a09d 1110 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1111 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1112 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1113 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1114 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1115 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1116 if (extra)
1117 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1118
fffd0934
JB		 1119 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1120 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1121 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1122 WARN_ON(err);
1123 }
1124
1672c0e3
JB		 1125 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1126 tx_flags;
62ae67be 1127 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1128}
1129
6ae16775
AQ		 1130void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1131 const u8 *bssid, u16 stype, u16 reason,
1132 bool send_frame, u8 *frame_buf)
1133{
1134 struct ieee80211_local *local = sdata->local;
1135 struct sk_buff *skb;
1136 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1137
1138 /* build frame */
1139 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1140 mgmt->duration = 0; /* initialize only */
1141 mgmt->seq_ctrl = 0; /* initialize only */
1142 memcpy(mgmt->da, bssid, ETH_ALEN);
1143 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1144 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1145 /* u.deauth.reason_code == u.disassoc.reason_code */
1146 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1147
1148 if (send_frame) {
1149 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1150 IEEE80211_DEAUTH_FRAME_LEN);
1151 if (!skb)
1152 return;
1153
1154 skb_reserve(skb, local->hw.extra_tx_headroom);
1155
1156 /* copy in frame */
1157 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1158 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1159
1160 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1161 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1162 IEEE80211_SKB_CB(skb)->flags |=
1163 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1164
1165 ieee80211_tx_skb(sdata, skb);
1166 }
1167}
1168
de95a54b 1169int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
c604b9f2 1170 size_t buffer_len, const u8 *ie, size_t ie_len,
651b5225 1171 enum ieee80211_band band, u32 rate_mask,
2103dec1 1172 struct cfg80211_chan_def *chandef)
de95a54b
JB		 1173{
1174 struct ieee80211_supported_band *sband;
c604b9f2 1175 u8 *pos = buffer, *end = buffer + buffer_len;
8e664fb3
JB		 1176 size_t offset = 0, noffset;
1177 int supp_rates_len, i;
8dcb2003
JM		 1178 u8 rates[32];
1179 int num_rates;
1180 int ext_rates_len;
2103dec1
SW		 1181 int shift;
1182 u32 rate_flags;
de95a54b 1183
4d36ec58 1184 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1185 if (WARN_ON_ONCE(!sband))
1186 return 0;
de95a54b 1187
2103dec1
SW		 1188 rate_flags = ieee80211_chandef_rate_flags(chandef);
1189 shift = ieee80211_chandef_get_shift(chandef);
1190
8dcb2003
JM		 1191 num_rates = 0;
1192 for (i = 0; i < sband->n_bitrates; i++) {
1193 if ((BIT(i) & rate_mask) == 0)
1194 continue; /* skip rate */
2103dec1
SW		 1195 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1196 continue;
1197
1198 rates[num_rates++] =
1199 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1200 (1 << shift) * 5);
8dcb2003
JM		 1201 }
1202
1203 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1204
c604b9f2
JB		 1205 if (end - pos < 2 + supp_rates_len)
1206 goto out_err;
de95a54b 1207 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1208 *pos++ = supp_rates_len;
8dcb2003
JM		 1209 memcpy(pos, rates, supp_rates_len);
1210 pos += supp_rates_len;
8e664fb3
JB		 1211
1212 /* insert "request information" if in custom IEs */
1213 if (ie && ie_len) {
1214 static const u8 before_extrates[] = {
1215 WLAN_EID_SSID,
1216 WLAN_EID_SUPP_RATES,
1217 WLAN_EID_REQUEST,
1218 };
1219 noffset = ieee80211_ie_split(ie, ie_len,
1220 before_extrates,
1221 ARRAY_SIZE(before_extrates),
1222 offset);
c604b9f2
JB		 1223 if (end - pos < noffset - offset)
1224 goto out_err;
8e664fb3
JB		 1225 memcpy(pos, ie + offset, noffset - offset);
1226 pos += noffset - offset;
1227 offset = noffset;
1228 }
1229
8dcb2003
JM		 1230 ext_rates_len = num_rates - supp_rates_len;
1231 if (ext_rates_len > 0) {
c604b9f2
JB		 1232 if (end - pos < 2 + ext_rates_len)
1233 goto out_err;
8e664fb3 1234 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1235 *pos++ = ext_rates_len;
1236 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1237 pos += ext_rates_len;
8e664fb3
JB		 1238 }
1239
2103dec1 1240 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1241 if (end - pos < 3)
1242 goto out_err;
651b5225
JM		 1243 *pos++ = WLAN_EID_DS_PARAMS;
1244 *pos++ = 1;
2103dec1
SW		 1245 *pos++ = ieee80211_frequency_to_channel(
1246 chandef->chan->center_freq);
651b5225
JM		 1247 }
1248
8e664fb3
JB		 1249 /* insert custom IEs that go before HT */
1250 if (ie && ie_len) {
1251 static const u8 before_ht[] = {
1252 WLAN_EID_SSID,
1253 WLAN_EID_SUPP_RATES,
1254 WLAN_EID_REQUEST,
1255 WLAN_EID_EXT_SUPP_RATES,
1256 WLAN_EID_DS_PARAMS,
1257 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1258 };
1259 noffset = ieee80211_ie_split(ie, ie_len,
1260 before_ht, ARRAY_SIZE(before_ht),
1261 offset);
c604b9f2
JB		 1262 if (end - pos < noffset - offset)
1263 goto out_err;
8e664fb3
JB		 1264 memcpy(pos, ie + offset, noffset - offset);
1265 pos += noffset - offset;
1266 offset = noffset;
de95a54b
JB		 1267 }
1268
c604b9f2
JB		 1269 if (sband->ht_cap.ht_supported) {
1270 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1271 goto out_err;
ef96a842
BG		 1272 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1273 sband->ht_cap.cap);
c604b9f2 1274 }
5ef2d41a 1275
de95a54b
JB		 1276 /*
1277 * If adding more here, adjust code in main.c
1278 * that calculates local->scan_ies_len.
1279 */
1280
4d952300 1281 /* insert custom IEs that go before VHT */
8e664fb3 1282 if (ie && ie_len) {
4d952300
JB		 1283 static const u8 before_vht[] = {
1284 WLAN_EID_SSID,
1285 WLAN_EID_SUPP_RATES,
1286 WLAN_EID_REQUEST,
1287 WLAN_EID_EXT_SUPP_RATES,
1288 WLAN_EID_DS_PARAMS,
1289 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1290 WLAN_EID_HT_CAPABILITY,
1291 WLAN_EID_BSS_COEX_2040,
1292 WLAN_EID_EXT_CAPABILITY,
1293 WLAN_EID_SSID_LIST,
1294 WLAN_EID_CHANNEL_USAGE,
1295 WLAN_EID_INTERWORKING,
1296 /* mesh ID can't happen here */
1297 /* 60 GHz can't happen here right now */
1298 };
1299 noffset = ieee80211_ie_split(ie, ie_len,
1300 before_vht, ARRAY_SIZE(before_vht),
1301 offset);
c604b9f2
JB		 1302 if (end - pos < noffset - offset)
1303 goto out_err;
8e664fb3
JB		 1304 memcpy(pos, ie + offset, noffset - offset);
1305 pos += noffset - offset;
4d952300 1306 offset = noffset;
de95a54b
JB		 1307 }
1308
c604b9f2
JB		 1309 if (sband->vht_cap.vht_supported) {
1310 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1311 goto out_err;
ba0afa2f
MP		 1312 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1313 sband->vht_cap.cap);
c604b9f2 1314 }
ba0afa2f 1315
4d952300
JB		 1316 /* add any remaining custom IEs */
1317 if (ie && ie_len) {
1318 noffset = ie_len;
1319 if (end - pos < noffset - offset)
1320 goto out_err;
1321 memcpy(pos, ie + offset, noffset - offset);
1322 pos += noffset - offset;
1323 }
1324
c604b9f2
JB		 1325 return pos - buffer;
1326 out_err:
1327 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1328 return pos - buffer;
1329}
1330
a619a4c0 1331struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
85a237fe 1332 u8 *dst, u32 ratemask,
6b77863b 1333 struct ieee80211_channel *chan,
a619a4c0 1334 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1335 const u8 *ie, size_t ie_len,
1336 bool directed)
46900298
JB		 1337{
1338 struct ieee80211_local *local = sdata->local;
2103dec1 1339 struct cfg80211_chan_def chandef;
46900298
JB		 1340 struct sk_buff *skb;
1341 struct ieee80211_mgmt *mgmt;
b9a9ada1 1342 int ies_len;
46900298 1343
a806c558
PS		 1344 /*
1345 * Do not send DS Channel parameter for directed probe requests
1346 * in order to maximize the chance that we get a response. Some
1347 * badly-behaved APs don't respond when this parameter is included.
1348 */
2103dec1 1349 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1350 if (directed)
2103dec1 1351 chandef.chan = NULL;
a806c558 1352 else
2103dec1 1353 chandef.chan = chan;
651b5225 1354
7c12ce8b 1355 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
b9a9ada1 1356 ssid, ssid_len, 100 + ie_len);
5b2bbf75 1357 if (!skb)
b9a9ada1
JB		 1358 return NULL;
1359
1360 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1361 skb_tailroom(skb),
1362 ie, ie_len, chan->band,
2103dec1 1363 ratemask, &chandef);
b9a9ada1 1364 skb_put(skb, ies_len);
7c12ce8b 1365
46900298 1366 if (dst) {
7c12ce8b 1367 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1368 memcpy(mgmt->da, dst, ETH_ALEN);
1369 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1370 }
46900298 1371
62ae67be 1372 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1373
a619a4c0
JO		 1374 return skb;
1375}
1376
1377void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1378 const u8 *ssid, size_t ssid_len,
a806c558 1379 const u8 *ie, size_t ie_len,
1672c0e3 1380 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1381 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1382{
1383 struct sk_buff *skb;
1384
fe94fe05 1385 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
6b77863b 1386 ssid, ssid_len,
85a237fe 1387 ie, ie_len, directed);
aad14ceb 1388 if (skb) {
1672c0e3 1389 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1390 if (scan)
1391 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1392 else
1393 ieee80211_tx_skb(sdata, skb);
aad14ceb 1394 }
46900298
JB		 1395}
1396
2103dec1 1397u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1398 struct ieee802_11_elems *elems,
9ebb61a2 1399 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1400{
1401 struct ieee80211_supported_band *sband;
46900298 1402 size_t num_rates;
2103dec1
SW		 1403 u32 supp_rates, rate_flags;
1404 int i, j, shift;
1405 sband = sdata->local->hw.wiphy->bands[band];
1406
1407 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1408 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1409
4ee73f33
MK		 1410 if (WARN_ON(!sband))
1411 return 1;
46900298 1412
46900298
JB		 1413 num_rates = sband->n_bitrates;
1414 supp_rates = 0;
1415 for (i = 0; i < elems->supp_rates_len +
1416 elems->ext_supp_rates_len; i++) {
1417 u8 rate = 0;
1418 int own_rate;
9ebb61a2 1419 bool is_basic;
46900298
JB		 1420 if (i < elems->supp_rates_len)
1421 rate = elems->supp_rates[i];
1422 else if (elems->ext_supp_rates)
1423 rate = elems->ext_supp_rates
1424 [i - elems->supp_rates_len];
1425 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1426 is_basic = !!(rate & 0x80);
1427
1428 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1429 continue;
1430
1431 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1432 int brate;
1433 if ((rate_flags & sband->bitrates[j].flags)
1434 != rate_flags)
1435 continue;
1436
1437 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1438 1 << shift);
1439
1440 if (brate == own_rate) {
46900298 1441 supp_rates |= BIT(j);
9ebb61a2
AN		 1442 if (basic_rates && is_basic)
1443 *basic_rates |= BIT(j);
1444 }
1445 }
46900298
JB		 1446 }
1447 return supp_rates;
1448}
f2753ddb 1449
84f6a01c
JB		 1450void ieee80211_stop_device(struct ieee80211_local *local)
1451{
1452 ieee80211_led_radio(local, false);
67408c8c 1453 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1454
1455 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1456
1457 flush_workqueue(local->workqueue);
678f415f 1458 drv_stop(local);
84f6a01c
JB		 1459}
1460
f6837ba8
JB		 1461static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1462{
1463 struct ieee80211_sub_if_data *sdata;
1464 struct ieee80211_chanctx *ctx;
1465
1466 /*
1467 * We get here if during resume the device can't be restarted properly.
1468 * We might also get here if this happens during HW reset, which is a
1469 * slightly different situation and we need to drop all connections in
1470 * the latter case.
1471 *
1472 * Ask cfg80211 to turn off all interfaces, this will result in more
1473 * warnings but at least we'll then get into a clean stopped state.
1474 */
1475
1476 local->resuming = false;
1477 local->suspended = false;
1478 local->started = false;
1479
1480 /* scheduled scan clearly can't be running any more, but tell
1481 * cfg80211 and clear local state
1482 */
1483 ieee80211_sched_scan_end(local);
1484
1485 list_for_each_entry(sdata, &local->interfaces, list)
1486 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1487
1488 /* Mark channel contexts as not being in the driver any more to avoid
1489 * removing them from the driver during the shutdown process...
1490 */
1491 mutex_lock(&local->chanctx_mtx);
1492 list_for_each_entry(ctx, &local->chanctx_list, list)
1493 ctx->driver_present = false;
1494 mutex_unlock(&local->chanctx_mtx);
1495
1496 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1497}
1498
153a5fc4
SG		 1499static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1500 struct ieee80211_sub_if_data *sdata)
1501{
1502 struct ieee80211_chanctx_conf *conf;
1503 struct ieee80211_chanctx *ctx;
1504
1505 if (!local->use_chanctx)
1506 return;
1507
1508 mutex_lock(&local->chanctx_mtx);
1509 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1510 lockdep_is_held(&local->chanctx_mtx));
1511 if (conf) {
1512 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1513 drv_assign_vif_chanctx(local, sdata, ctx);
1514 }
1515 mutex_unlock(&local->chanctx_mtx);
1516}
1517
f2753ddb
JB		 1518int ieee80211_reconfig(struct ieee80211_local *local)
1519{
1520 struct ieee80211_hw *hw = &local->hw;
1521 struct ieee80211_sub_if_data *sdata;
55de908a 1522 struct ieee80211_chanctx *ctx;
f2753ddb 1523 struct sta_info *sta;
2683d65b 1524 int res, i;
d888130a 1525 bool reconfig_due_to_wowlan = false;
d43c6b6e
DS		 1526 struct ieee80211_sub_if_data *sched_scan_sdata;
1527 bool sched_scan_stopped = false;
d888130a 1528
8f21b0ad 1529#ifdef CONFIG_PM
ceb99fe0
JB		 1530 if (local->suspended)
1531 local->resuming = true;
f2753ddb 1532
eecc4800 1533 if (local->wowlan) {
eecc4800 1534 res = drv_resume(local);
27b3eb9c 1535 local->wowlan = false;
eecc4800
JB		 1536 if (res < 0) {
1537 local->resuming = false;
1538 return res;
1539 }
1540 if (res == 0)
1541 goto wake_up;
1542 WARN_ON(res > 1);
1543 /*
1544 * res is 1, which means the driver requested
1545 * to go through a regular reset on wakeup.
1546 */
d888130a 1547 reconfig_due_to_wowlan = true;
eecc4800
JB		 1548 }
1549#endif
94f9b97b
JB		 1550 /* everything else happens only if HW was up & running */
1551 if (!local->open_count)
1552 goto wake_up;
f2753ddb 1553
94f9b97b
JB		 1554 /*
1555 * Upon resume hardware can sometimes be goofy due to
1556 * various platform / driver / bus issues, so restarting
1557 * the device may at times not work immediately. Propagate
1558 * the error.
1559 */
1560 res = drv_start(local);
1561 if (res) {
f6837ba8
JB		 1562 if (local->suspended)
1563 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1564 else
1565 WARN(1, "Hardware became unavailable during restart.\n");
1566 ieee80211_handle_reconfig_failure(local);
94f9b97b 1567 return res;
f2753ddb
JB		 1568 }
1569
7f281975
YAP		 1570 /* setup fragmentation threshold */
1571 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1572
1573 /* setup RTS threshold */
1574 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1575
1576 /* reset coverage class */
1577 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1578
94f9b97b
JB		 1579 ieee80211_led_radio(local, true);
1580 ieee80211_mod_tpt_led_trig(local,
1581 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1582
f2753ddb 1583 /* add interfaces */
4b6f1dd6
JB		 1584 sdata = rtnl_dereference(local->monitor_sdata);
1585 if (sdata) {
3c3e21e7
JB		 1586 /* in HW restart it exists already */
1587 WARN_ON(local->resuming);
4b6f1dd6
JB		 1588 res = drv_add_interface(local, sdata);
1589 if (WARN_ON(res)) {
0c2bef46 1590 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1591 synchronize_net();
1592 kfree(sdata);
1593 }
1594 }
1595
f2753ddb
JB		 1596 list_for_each_entry(sdata, &local->interfaces, list) {
1597 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1598 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1599 ieee80211_sdata_running(sdata))
7b7eab6f 1600 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1601 }
1602
55de908a 1603 /* add channel contexts */
f0dea9c7
AS		 1604 if (local->use_chanctx) {
1605 mutex_lock(&local->chanctx_mtx);
1606 list_for_each_entry(ctx, &local->chanctx_list, list)
1607 WARN_ON(drv_add_chanctx(local, ctx));
1608 mutex_unlock(&local->chanctx_mtx);
55de908a 1609
7df180f7
ZG		 1610 list_for_each_entry(sdata, &local->interfaces, list) {
1611 if (!ieee80211_sdata_running(sdata))
1612 continue;
1613 ieee80211_assign_chanctx(local, sdata);
1614 }
6352c87f 1615
7df180f7
ZG		 1616 sdata = rtnl_dereference(local->monitor_sdata);
1617 if (sdata && ieee80211_sdata_running(sdata))
1618 ieee80211_assign_chanctx(local, sdata);
1619 }
fe5f2559 1620
f2753ddb 1621 /* add STAs back */
34e89507
JB		 1622 mutex_lock(&local->sta_mtx);
1623 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1624 enum ieee80211_sta_state state;
f09603a2 1625
2e8d397e
AN		 1626 if (!sta->uploaded)
1627 continue;
1628
1629 /* AP-mode stations will be added later */
1630 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1631 continue;
1632
1633 for (state = IEEE80211_STA_NOTEXIST;
1634 state < sta->sta_state; state++)
1635 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1636 state + 1));
f2753ddb 1637 }
34e89507 1638 mutex_unlock(&local->sta_mtx);
f2753ddb 1639
2683d65b 1640 /* reconfigure tx conf */
54bcbc69
JB		 1641 if (hw->queues >= IEEE80211_NUM_ACS) {
1642 list_for_each_entry(sdata, &local->interfaces, list) {
1643 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1644 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1645 !ieee80211_sdata_running(sdata))
1646 continue;
f6f3def3 1647
54bcbc69
JB		 1648 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1649 drv_conf_tx(local, sdata, i,
1650 &sdata->tx_conf[i]);
1651 }
f6f3def3 1652 }
2683d65b 1653
f2753ddb
JB		 1654 /* reconfigure hardware */
1655 ieee80211_hw_config(local, ~0);
1656
f2753ddb 1657 ieee80211_configure_filter(local);
f2753ddb
JB		 1658
1659 /* Finally also reconfigure all the BSS information */
1660 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1661 u32 changed;
1662
9607e6b6 1663 if (!ieee80211_sdata_running(sdata))
f2753ddb 1664 continue;
ac8dd506
JB		 1665
1666 /* common change flags for all interface types */
1667 changed = BSS_CHANGED_ERP_CTS_PROT |
1668 BSS_CHANGED_ERP_PREAMBLE |
1669 BSS_CHANGED_ERP_SLOT |
1670 BSS_CHANGED_HT |
1671 BSS_CHANGED_BASIC_RATES |
1672 BSS_CHANGED_BEACON_INT |
1673 BSS_CHANGED_BSSID |
4ced3f74 1674 BSS_CHANGED_CQM |
55de47f6 1675 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1676 BSS_CHANGED_IDLE |
1677 BSS_CHANGED_TXPOWER;
ac8dd506 1678
f2753ddb
JB		 1679 switch (sdata->vif.type) {
1680 case NL80211_IFTYPE_STATION:
0d392e93 1681 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1682 BSS_CHANGED_ARP_FILTER |
1683 BSS_CHANGED_PS;
c65dd147 1684
989c6505
AB		 1685 /* Re-send beacon info report to the driver */
1686 if (sdata->u.mgd.have_beacon)
1687 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1688
8d61ffa5 1689 sdata_lock(sdata);
ac8dd506 1690 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1691 sdata_unlock(sdata);
ac8dd506 1692 break;
f2753ddb 1693 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1694 changed |= BSS_CHANGED_IBSS;
1695 /* fall through */
f2753ddb 1696 case NL80211_IFTYPE_AP:
339afbf4 1697 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1698
1041638f 1699 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1700 changed |= BSS_CHANGED_AP_PROBE_RESP;
1701
1041638f
JB		 1702 if (rcu_access_pointer(sdata->u.ap.beacon))
1703 drv_start_ap(local, sdata);
1704 }
1705
7827493b 1706 /* fall through */
f2753ddb 1707 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1708 if (sdata->vif.bss_conf.enable_beacon) {
1709 changed |= BSS_CHANGED_BEACON |
1710 BSS_CHANGED_BEACON_ENABLED;
1711 ieee80211_bss_info_change_notify(sdata, changed);
1712 }
f2753ddb
JB		 1713 break;
1714 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1715 case NL80211_IFTYPE_AP_VLAN:
1716 case NL80211_IFTYPE_MONITOR:
98104fde 1717 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1718 /* nothing to do */
f142c6b9 1719 break;
f2753ddb 1720 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1721 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1722 case NL80211_IFTYPE_P2P_CLIENT:
1723 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1724 WARN_ON(1);
1725 break;
1726 }
1727 }
1728
8e1b23b9
ES		 1729 ieee80211_recalc_ps(local, -1);
1730
6e1b1b24
EP		 1731 /*
1732 * The sta might be in psm against the ap (e.g. because
1733 * this was the state before a hw restart), so we
1734 * explicitly send a null packet in order to make sure
1735 * it'll sync against the ap (and get out of psm).
1736 */
1737 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1738 list_for_each_entry(sdata, &local->interfaces, list) {
1739 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1740 continue;
20f544ee
JB		 1741 if (!sdata->u.mgd.associated)
1742 continue;
6e1b1b24
EP		 1743
1744 ieee80211_send_nullfunc(local, sdata, 0);
1745 }
1746 }
1747
2e8d397e
AN		 1748 /* APs are now beaconing, add back stations */
1749 mutex_lock(&local->sta_mtx);
1750 list_for_each_entry(sta, &local->sta_list, list) {
1751 enum ieee80211_sta_state state;
1752
1753 if (!sta->uploaded)
1754 continue;
1755
1756 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1757 continue;
1758
1759 for (state = IEEE80211_STA_NOTEXIST;
1760 state < sta->sta_state; state++)
1761 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1762 state + 1));
1763 }
1764 mutex_unlock(&local->sta_mtx);
1765
7b21aea0
ES		 1766 /* add back keys */
1767 list_for_each_entry(sdata, &local->interfaces, list)
1768 if (ieee80211_sdata_running(sdata))
1769 ieee80211_enable_keys(sdata);
1770
c6209488 1771 wake_up:
04800ada
AN		 1772 local->in_reconfig = false;
1773 barrier();
1774
3c3e21e7
JB		 1775 if (local->monitors == local->open_count && local->monitors > 0)
1776 ieee80211_add_virtual_monitor(local);
1777
2a419056
JB		 1778 /*
1779 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1780 * sessions can be established after a resume.
1781 *
1782 * Also tear down aggregation sessions since reconfiguring
1783 * them in a hardware restart scenario is not easily done
1784 * right now, and the hardware will have lost information
1785 * about the sessions, but we and the AP still think they
1786 * are active. This is really a workaround though.
1787 */
74e2bd1f 1788 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 1789 mutex_lock(&local->sta_mtx);
1790
1791 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 1792 ieee80211_sta_tear_down_BA_sessions(
1793 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 1794 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 1795 }
2a419056
JB		 1796
1797 mutex_unlock(&local->sta_mtx);
74e2bd1f 1798 }
74e2bd1f 1799
445ea4e8
JB		 1800 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1801 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
f2753ddb 1802
32769814
AN		 1803 /*
1804 * Reconfigure sched scan if it was interrupted by FW restart or
1805 * suspend.
1806 */
1807 mutex_lock(&local->mtx);
1808 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1809 lockdep_is_held(&local->mtx));
1810 if (sched_scan_sdata && local->sched_scan_req)
1811 /*
1812 * Sched scan stopped, but we don't want to report it. Instead,
1813 * we're trying to reschedule.
1814 */
1815 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1816 local->sched_scan_req))
1817 sched_scan_stopped = true;
1818 mutex_unlock(&local->mtx);
1819
1820 if (sched_scan_stopped)
e669ba2d 1821 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 1822
5bb644a0
JB		 1823 /*
1824 * If this is for hw restart things are still running.
1825 * We may want to change that later, however.
1826 */
8f21b0ad 1827 if (!local->suspended || reconfig_due_to_wowlan)
9214ad7f 1828 drv_restart_complete(local);
8f21b0ad
JB		 1829
1830 if (!local->suspended)
5bb644a0
JB		 1831 return 0;
1832
1833#ifdef CONFIG_PM
ceb99fe0 1834 /* first set suspended false, then resuming */
5bb644a0 1835 local->suspended = false;
ceb99fe0
JB		 1836 mb();
1837 local->resuming = false;
5bb644a0 1838
b8360ab8
JB		 1839 list_for_each_entry(sdata, &local->interfaces, list) {
1840 if (!ieee80211_sdata_running(sdata))
1841 continue;
1842 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1843 ieee80211_sta_restart(sdata);
1844 }
1845
26d59535 1846 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 1847#else
1848 WARN_ON(1);
1849#endif
d43c6b6e 1850
f2753ddb
JB		 1851 return 0;
1852}
42935eca 1853
95acac61
JB		 1854void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1855{
1856 struct ieee80211_sub_if_data *sdata;
1857 struct ieee80211_local *local;
1858 struct ieee80211_key *key;
1859
1860 if (WARN_ON(!vif))
1861 return;
1862
1863 sdata = vif_to_sdata(vif);
1864 local = sdata->local;
1865
1866 if (WARN_ON(!local->resuming))
1867 return;
1868
1869 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1870 return;
1871
1872 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1873
1874 mutex_lock(&local->key_mtx);
1875 list_for_each_entry(key, &sdata->key_list, list)
1876 key->flags |= KEY_FLAG_TAINTED;
1877 mutex_unlock(&local->key_mtx);
1878}
1879EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1880
04ecd257 1881void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 1882{
04ecd257
JB		 1883 struct ieee80211_local *local = sdata->local;
1884 struct ieee80211_chanctx_conf *chanctx_conf;
1885 struct ieee80211_chanctx *chanctx;
025e6be2 1886
04ecd257 1887 mutex_lock(&local->chanctx_mtx);
0f78231b 1888
04ecd257
JB		 1889 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1890 lockdep_is_held(&local->chanctx_mtx));
0f78231b 1891
04ecd257 1892 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 1893 goto unlock;
0f78231b 1894
04ecd257
JB		 1895 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1896 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 1897 unlock:
04ecd257 1898 mutex_unlock(&local->chanctx_mtx);
0f78231b 1899}
8e664fb3 1900
21f659bf
EP		 1901void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1902{
1903 struct ieee80211_local *local = sdata->local;
1904 struct ieee80211_chanctx_conf *chanctx_conf;
1905 struct ieee80211_chanctx *chanctx;
1906
1907 mutex_lock(&local->chanctx_mtx);
1908
1909 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1910 lockdep_is_held(&local->chanctx_mtx));
1911
1912 if (WARN_ON_ONCE(!chanctx_conf))
1913 goto unlock;
1914
1915 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1916 ieee80211_recalc_chanctx_min_def(local, chanctx);
1917 unlock:
1918 mutex_unlock(&local->chanctx_mtx);
1919}
1920
8e664fb3
JB		 1921static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1922{
1923 int i;
1924
1925 for (i = 0; i < n_ids; i++)
1926 if (ids[i] == id)
1927 return true;
1928 return false;
1929}
1930
1931/**
1932 * ieee80211_ie_split - split an IE buffer according to ordering
1933 *
1934 * @ies: the IE buffer
1935 * @ielen: the length of the IE buffer
1936 * @ids: an array with element IDs that are allowed before
1937 * the split
1938 * @n_ids: the size of the element ID array
1939 * @offset: offset where to start splitting in the buffer
1940 *
1941 * This function splits an IE buffer by updating the @offset
1942 * variable to point to the location where the buffer should be
1943 * split.
1944 *
1945 * It assumes that the given IE buffer is well-formed, this
1946 * has to be guaranteed by the caller!
1947 *
1948 * It also assumes that the IEs in the buffer are ordered
1949 * correctly, if not the result of using this function will not
1950 * be ordered correctly either, i.e. it does no reordering.
1951 *
1952 * The function returns the offset where the next part of the
1953 * buffer starts, which may be @ielen if the entire (remainder)
1954 * of the buffer should be used.
1955 */
1956size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1957 const u8 *ids, int n_ids, size_t offset)
1958{
1959 size_t pos = offset;
1960
1961 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1962 pos += 2 + ies[pos + 1];
1963
1964 return pos;
1965}
1966
1967size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1968{
1969 size_t pos = offset;
1970
1971 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1972 pos += 2 + ies[pos + 1];
1973
1974 return pos;
1975}
615f7b9b
MV		 1976
1977static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1978 int rssi_min_thold,
1979 int rssi_max_thold)
1980{
1981 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1982
1983 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1984 return;
1985
1986 /*
1987 * Scale up threshold values before storing it, as the RSSI averaging
1988 * algorithm uses a scaled up value as well. Change this scaling
1989 * factor if the RSSI averaging algorithm changes.
1990 */
1991 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1992 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1993}
1994
1995void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1996 int rssi_min_thold,
1997 int rssi_max_thold)
1998{
1999 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2000
2001 WARN_ON(rssi_min_thold == rssi_max_thold ||
2002 rssi_min_thold > rssi_max_thold);
2003
2004 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2005 rssi_max_thold);
2006}
2007EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2008
2009void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2010{
2011 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2012
2013 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2014}
2015EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2016
ef96a842 2017u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2018 u16 cap)
2019{
2020 __le16 tmp;
2021
2022 *pos++ = WLAN_EID_HT_CAPABILITY;
2023 *pos++ = sizeof(struct ieee80211_ht_cap);
2024 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2025
2026 /* capability flags */
2027 tmp = cpu_to_le16(cap);
2028 memcpy(pos, &tmp, sizeof(u16));
2029 pos += sizeof(u16);
2030
2031 /* AMPDU parameters */
ef96a842
BG		 2032 *pos++ = ht_cap->ampdu_factor |
2033 (ht_cap->ampdu_density <<
42e7aa77
AS		 2034 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2035
2036 /* MCS set */
ef96a842
BG		 2037 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2038 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2039
2040 /* extended capabilities */
2041 pos += sizeof(__le16);
2042
2043 /* BF capabilities */
2044 pos += sizeof(__le32);
2045
2046 /* antenna selection */
2047 pos += sizeof(u8);
2048
2049 return pos;
2050}
2051
ba0afa2f 2052u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2053 u32 cap)
ba0afa2f
MP		 2054{
2055 __le32 tmp;
2056
2057 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2058 *pos++ = sizeof(struct ieee80211_vht_cap);
2059 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2060
2061 /* capability flags */
2062 tmp = cpu_to_le32(cap);
2063 memcpy(pos, &tmp, sizeof(u32));
2064 pos += sizeof(u32);
2065
2066 /* VHT MCS set */
2067 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2068 pos += sizeof(vht_cap->vht_mcs);
2069
2070 return pos;
2071}
2072
074d46d1 2073u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2074 const struct cfg80211_chan_def *chandef,
431e3154 2075 u16 prot_mode)
42e7aa77 2076{
074d46d1 2077 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2078 /* Build HT Information */
074d46d1
JB		 2079 *pos++ = WLAN_EID_HT_OPERATION;
2080 *pos++ = sizeof(struct ieee80211_ht_operation);
2081 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2082 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2083 chandef->chan->center_freq);
2084 switch (chandef->width) {
2085 case NL80211_CHAN_WIDTH_160:
2086 case NL80211_CHAN_WIDTH_80P80:
2087 case NL80211_CHAN_WIDTH_80:
2088 case NL80211_CHAN_WIDTH_40:
2089 if (chandef->center_freq1 > chandef->chan->center_freq)
2090 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2091 else
2092 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2093 break;
42e7aa77 2094 default:
074d46d1 2095 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2096 break;
2097 }
aee286c2 2098 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2099 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2100 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2101 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2102
431e3154 2103 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2104 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2105
2106 /* It seems that Basic MCS set and Supported MCS set
2107 are identical for the first 10 bytes */
074d46d1
JB		 2108 memset(&ht_oper->basic_set, 0, 16);
2109 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2110
074d46d1 2111 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2112}
2113
4bf88530 2114void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2115 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2116 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2117{
2118 enum nl80211_channel_type channel_type;
2119
4bf88530
JB		 2120 if (!ht_oper) {
2121 cfg80211_chandef_create(chandef, control_chan,
2122 NL80211_CHAN_NO_HT);
2123 return;
2124 }
42e7aa77 2125
074d46d1 2126 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2127 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2128 channel_type = NL80211_CHAN_HT20;
2129 break;
2130 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2131 channel_type = NL80211_CHAN_HT40PLUS;
2132 break;
2133 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2134 channel_type = NL80211_CHAN_HT40MINUS;
2135 break;
2136 default:
2137 channel_type = NL80211_CHAN_NO_HT;
2138 }
2139
4bf88530 2140 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2141}
2142
2103dec1
SW		 2143int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2144 const struct ieee80211_supported_band *sband,
2145 const u8 *srates, int srates_len, u32 *rates)
2146{
2147 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2148 int shift = ieee80211_chandef_get_shift(chandef);
2149 struct ieee80211_rate *br;
2150 int brate, rate, i, j, count = 0;
2151
2152 *rates = 0;
2153
2154 for (i = 0; i < srates_len; i++) {
2155 rate = srates[i] & 0x7f;
2156
2157 for (j = 0; j < sband->n_bitrates; j++) {
2158 br = &sband->bitrates[j];
2159 if ((rate_flags & br->flags) != rate_flags)
2160 continue;
2161
2162 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2163 if (brate == rate) {
2164 *rates |= BIT(j);
2165 count++;
2166 break;
2167 }
2168 }
2169 }
2170 return count;
2171}
2172
fc8a7321 2173int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2174 struct sk_buff *skb, bool need_basic,
2175 enum ieee80211_band band)
768db343 2176{
768db343
AN		 2177 struct ieee80211_local *local = sdata->local;
2178 struct ieee80211_supported_band *sband;
2103dec1 2179 int rate, shift;
768db343 2180 u8 i, rates, *pos;
fc8a7321 2181 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2182 u32 rate_flags;
768db343 2183
2103dec1
SW		 2184 shift = ieee80211_vif_get_shift(&sdata->vif);
2185 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2186 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2187 rates = 0;
2188 for (i = 0; i < sband->n_bitrates; i++) {
2189 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2190 continue;
2191 rates++;
2192 }
768db343
AN		 2193 if (rates > 8)
2194 rates = 8;
2195
2196 if (skb_tailroom(skb) < rates + 2)
2197 return -ENOMEM;
2198
2199 pos = skb_put(skb, rates + 2);
2200 *pos++ = WLAN_EID_SUPP_RATES;
2201 *pos++ = rates;
2202 for (i = 0; i < rates; i++) {
657c3e0c 2203 u8 basic = 0;
2103dec1
SW		 2204 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2205 continue;
2206
657c3e0c
AN		 2207 if (need_basic && basic_rates & BIT(i))
2208 basic = 0x80;
768db343 2209 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2210 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2211 5 * (1 << shift));
2212 *pos++ = basic | (u8) rate;
768db343
AN		 2213 }
2214
2215 return 0;
2216}
2217
fc8a7321 2218int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2219 struct sk_buff *skb, bool need_basic,
2220 enum ieee80211_band band)
768db343 2221{
768db343
AN		 2222 struct ieee80211_local *local = sdata->local;
2223 struct ieee80211_supported_band *sband;
cc63ec76 2224 int rate, shift;
768db343 2225 u8 i, exrates, *pos;
fc8a7321 2226 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2227 u32 rate_flags;
2228
2229 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2230 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2231
6b77863b 2232 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2233 exrates = 0;
2234 for (i = 0; i < sband->n_bitrates; i++) {
2235 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2236 continue;
2237 exrates++;
2238 }
2239
768db343
AN		 2240 if (exrates > 8)
2241 exrates -= 8;
2242 else
2243 exrates = 0;
2244
2245 if (skb_tailroom(skb) < exrates + 2)
2246 return -ENOMEM;
2247
2248 if (exrates) {
2249 pos = skb_put(skb, exrates + 2);
2250 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2251 *pos++ = exrates;
2252 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2253 u8 basic = 0;
2103dec1
SW		 2254 if ((rate_flags & sband->bitrates[i].flags)
2255 != rate_flags)
2256 continue;
657c3e0c
AN		 2257 if (need_basic && basic_rates & BIT(i))
2258 basic = 0x80;
2103dec1
SW		 2259 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2260 5 * (1 << shift));
2261 *pos++ = basic | (u8) rate;
768db343
AN		 2262 }
2263 }
2264 return 0;
2265}
1dae27f8
WYG		 2266
2267int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2268{
2269 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2270 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2271
be6bcabc
WYG		 2272 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2273 /* non-managed type inferfaces */
2274 return 0;
2275 }
3a7bba64 2276 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2277}
0d8a0a17 2278EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2279
2280u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2281{
2282 if (!mcs)
2283 return 1;
2284
2285 /* TODO: consider rx_highest */
2286
2287 if (mcs->rx_mask[3])
2288 return 4;
2289 if (mcs->rx_mask[2])
2290 return 3;
2291 if (mcs->rx_mask[1])
2292 return 2;
2293 return 1;
2294}
f4bda337
TP		 2295
2296/**
2297 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2298 * @local: mac80211 hw info struct
2299 * @status: RX status
2300 * @mpdu_len: total MPDU length (including FCS)
2301 * @mpdu_offset: offset into MPDU to calculate timestamp at
2302 *
2303 * This function calculates the RX timestamp at the given MPDU offset, taking
2304 * into account what the RX timestamp was. An offset of 0 will just normalize
2305 * the timestamp to TSF at beginning of MPDU reception.
2306 */
2307u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2308 struct ieee80211_rx_status *status,
2309 unsigned int mpdu_len,
2310 unsigned int mpdu_offset)
2311{
2312 u64 ts = status->mactime;
2313 struct rate_info ri;
2314 u16 rate;
2315
2316 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2317 return 0;
2318
2319 memset(&ri, 0, sizeof(ri));
2320
2321 /* Fill cfg80211 rate info */
2322 if (status->flag & RX_FLAG_HT) {
2323 ri.mcs = status->rate_idx;
2324 ri.flags |= RATE_INFO_FLAGS_MCS;
2325 if (status->flag & RX_FLAG_40MHZ)
2326 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2327 if (status->flag & RX_FLAG_SHORT_GI)
2328 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2329 } else if (status->flag & RX_FLAG_VHT) {
2330 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2331 ri.mcs = status->rate_idx;
2332 ri.nss = status->vht_nss;
2333 if (status->flag & RX_FLAG_40MHZ)
2334 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
1b8d242a 2335 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
5614618e 2336 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
1b8d242a 2337 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
5614618e 2338 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
1b8d242a 2339 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
5614618e
JB		 2340 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2341 if (status->flag & RX_FLAG_SHORT_GI)
2342 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2343 } else {
2344 struct ieee80211_supported_band *sband;
2103dec1
SW		 2345 int shift = 0;
2346 int bitrate;
2347
2348 if (status->flag & RX_FLAG_10MHZ)
2349 shift = 1;
2350 if (status->flag & RX_FLAG_5MHZ)
2351 shift = 2;
f4bda337
TP		 2352
2353 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2354 bitrate = sband->bitrates[status->rate_idx].bitrate;
2355 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2356 }
2357
2358 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2359 if (WARN_ONCE(!rate,
2360 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2361 status->flag, status->rate_idx, status->vht_nss))
2362 return 0;
f4bda337
TP		 2363
2364 /* rewind from end of MPDU */
2365 if (status->flag & RX_FLAG_MACTIME_END)
2366 ts -= mpdu_len * 8 * 10 / rate;
2367
2368 ts += mpdu_offset * 8 * 10 / rate;
2369
2370 return ts;
2371}
164eb02d
SW		 2372
2373void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2374{
2375 struct ieee80211_sub_if_data *sdata;
d2859df5 2376 struct cfg80211_chan_def chandef;
164eb02d 2377
34a3740d 2378 mutex_lock(&local->mtx);
164eb02d
SW		 2379 mutex_lock(&local->iflist_mtx);
2380 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2381 /* it might be waiting for the local->mtx, but then
2382 * by the time it gets it, sdata->wdev.cac_started
2383 * will no longer be true
2384 */
2385 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2386
2387 if (sdata->wdev.cac_started) {
d2859df5 2388 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2389 ieee80211_vif_release_channel(sdata);
2390 cfg80211_cac_event(sdata->dev,
d2859df5 2391 &chandef,
164eb02d
SW		 2392 NL80211_RADAR_CAC_ABORTED,
2393 GFP_KERNEL);
2394 }
2395 }
2396 mutex_unlock(&local->iflist_mtx);
34a3740d 2397 mutex_unlock(&local->mtx);
164eb02d
SW		 2398}
2399
2400void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2401{
2402 struct ieee80211_local *local =
2403 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2404 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
164eb02d
SW		 2405
2406 ieee80211_dfs_cac_cancel(local);
2407
2408 if (local->use_chanctx)
2409 /* currently not handled */
2410 WARN_ON(1);
84a3d1c9 2411 else
164eb02d 2412 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2413}
2414
2415void ieee80211_radar_detected(struct ieee80211_hw *hw)
2416{
2417 struct ieee80211_local *local = hw_to_local(hw);
2418
2419 trace_api_radar_detected(local);
2420
2421 ieee80211_queue_work(hw, &local->radar_detected_work);
2422}
2423EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2424
2425u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2426{
2427 u32 ret;
2428 int tmp;
2429
2430 switch (c->width) {
2431 case NL80211_CHAN_WIDTH_20:
2432 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2433 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2434 break;
2435 case NL80211_CHAN_WIDTH_40:
2436 c->width = NL80211_CHAN_WIDTH_20;
2437 c->center_freq1 = c->chan->center_freq;
2438 ret = IEEE80211_STA_DISABLE_40MHZ |
2439 IEEE80211_STA_DISABLE_VHT;
2440 break;
2441 case NL80211_CHAN_WIDTH_80:
2442 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2443 /* n_P40 */
2444 tmp /= 2;
2445 /* freq_P40 */
2446 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2447 c->width = NL80211_CHAN_WIDTH_40;
2448 ret = IEEE80211_STA_DISABLE_VHT;
2449 break;
2450 case NL80211_CHAN_WIDTH_80P80:
2451 c->center_freq2 = 0;
2452 c->width = NL80211_CHAN_WIDTH_80;
2453 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2454 IEEE80211_STA_DISABLE_160MHZ;
2455 break;
2456 case NL80211_CHAN_WIDTH_160:
2457 /* n_P20 */
2458 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2459 /* n_P80 */
2460 tmp /= 4;
2461 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2462 c->width = NL80211_CHAN_WIDTH_80;
2463 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2464 IEEE80211_STA_DISABLE_160MHZ;
2465 break;
2466 default:
2467 case NL80211_CHAN_WIDTH_20_NOHT:
2468 WARN_ON_ONCE(1);
2469 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2470 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2471 break;
2472 case NL80211_CHAN_WIDTH_5:
2473 case NL80211_CHAN_WIDTH_10:
2474 WARN_ON_ONCE(1);
2475 /* keep c->width */
2476 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2477 break;
2478 }
2479
2480 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2481
2482 return ret;
2483}
687da132
EG		 2484
2485/*
2486 * Returns true if smps_mode_new is strictly more restrictive than
2487 * smps_mode_old.
2488 */
2489bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2490 enum ieee80211_smps_mode smps_mode_new)
2491{
2492 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2493 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2494 return false;
2495
2496 switch (smps_mode_old) {
2497 case IEEE80211_SMPS_STATIC:
2498 return false;
2499 case IEEE80211_SMPS_DYNAMIC:
2500 return smps_mode_new == IEEE80211_SMPS_STATIC;
2501 case IEEE80211_SMPS_OFF:
2502 return smps_mode_new != IEEE80211_SMPS_OFF;
2503 default:
2504 WARN_ON(1);
2505 }
2506
2507 return false;
2508}
c6da674a
CYY		 2509
2510int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2511 struct cfg80211_csa_settings *csa_settings)
2512{
2513 struct sk_buff *skb;
2514 struct ieee80211_mgmt *mgmt;
2515 struct ieee80211_local *local = sdata->local;
2516 int freq;
2517 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2518 sizeof(mgmt->u.action.u.chan_switch);
2519 u8 *pos;
2520
2521 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2522 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2523 return -EOPNOTSUPP;
2524
2525 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2526 5 + /* channel switch announcement element */
2527 3 + /* secondary channel offset element */
2528 8); /* mesh channel switch parameters element */
2529 if (!skb)
2530 return -ENOMEM;
2531
2532 skb_reserve(skb, local->tx_headroom);
2533 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2534 memset(mgmt, 0, hdr_len);
2535 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2536 IEEE80211_STYPE_ACTION);
2537
2538 eth_broadcast_addr(mgmt->da);
2539 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2540 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2541 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2542 } else {
2543 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2544 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2545 }
2546 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2547 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2548 pos = skb_put(skb, 5);
2549 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2550 *pos++ = 3; /* IE length */
2551 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2552 freq = csa_settings->chandef.chan->center_freq;
2553 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2554 *pos++ = csa_settings->count; /* count */
2555
2556 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2557 enum nl80211_channel_type ch_type;
2558
2559 skb_put(skb, 3);
2560 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2561 *pos++ = 1; /* IE length */
2562 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2563 if (ch_type == NL80211_CHAN_HT40PLUS)
2564 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2565 else
2566 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2567 }
2568
2569 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2570 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2571
2572 skb_put(skb, 8);
2573 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2574 *pos++ = 6; /* IE length */
2575 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2576 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2577 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2578 *pos++ |= csa_settings->block_tx ?
2579 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2580 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2581 pos += 2;
ca91dc97 2582 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2583 pos += 2;
c6da674a
CYY		 2584 }
2585
2586 ieee80211_tx_skb(sdata, skb);
2587 return 0;
2588}
2475b1cc
MS		 2589
2590bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2591{
2592 return !(cs == NULL || cs->cipher == 0 ||
2593 cs->hdr_len < cs->pn_len + cs->pn_off ||
2594 cs->hdr_len <= cs->key_idx_off ||
2595 cs->key_idx_shift > 7 ||
2596 cs->key_idx_mask == 0);
2597}
2598
2599bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2600{
2601 int i;
2602
2603 /* Ensure we have enough iftype bitmap space for all iftype values */
2604 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2605
2606 for (i = 0; i < n; i++)
2607 if (!ieee80211_cs_valid(&cs[i]))
2608 return false;
2609
2610 return true;
2611}
2612
2613const struct ieee80211_cipher_scheme *
2614ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2615 enum nl80211_iftype iftype)
2616{
2617 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2618 int n = local->hw.n_cipher_schemes;
2619 int i;
2620 const struct ieee80211_cipher_scheme *cs = NULL;
2621
2622 for (i = 0; i < n; i++) {
2623 if (l[i].cipher == cipher) {
2624 cs = &l[i];
2625 break;
2626 }
2627 }
2628
2629 if (!cs || !(cs->iftype & BIT(iftype)))
2630 return NULL;
2631
2632 return cs;
2633}
2634
2635int ieee80211_cs_headroom(struct ieee80211_local *local,
2636 struct cfg80211_crypto_settings *crypto,
2637 enum nl80211_iftype iftype)
2638{
2639 const struct ieee80211_cipher_scheme *cs;
2640 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2641 int i;
2642
2643 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2644 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2645 iftype);
2646
2647 if (cs && headroom < cs->hdr_len)
2648 headroom = cs->hdr_len;
2649 }
2650
2651 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2652 if (cs && headroom < cs->hdr_len)
2653 headroom = cs->hdr_len;
2654
2655 return headroom;
2656}
a7022e65
FF		 2657
2658static bool
2659ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2660{
2661 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2662 int skip;
2663
2664 if (end > 0)
2665 return false;
2666
2667 /* End time is in the past, check for repetitions */
2668 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2669 if (data->count[i] < 255) {
2670 if (data->count[i] <= skip) {
2671 data->count[i] = 0;
2672 return false;
2673 }
2674
2675 data->count[i] -= skip;
2676 }
2677
2678 data->desc[i].start += skip * data->desc[i].interval;
2679
2680 return true;
2681}
2682
2683static bool
2684ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2685 s32 *offset)
2686{
2687 bool ret = false;
2688 int i;
2689
2690 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2691 s32 cur;
2692
2693 if (!data->count[i])
2694 continue;
2695
2696 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2697 ret = true;
2698
2699 cur = data->desc[i].start - tsf;
2700 if (cur > *offset)
2701 continue;
2702
2703 cur = data->desc[i].start + data->desc[i].duration - tsf;
2704 if (cur > *offset)
2705 *offset = cur;
2706 }
2707
2708 return ret;
2709}
2710
2711static u32
2712ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2713{
2714 s32 offset = 0;
2715 int tries = 0;
2716 /*
2717 * arbitrary limit, used to avoid infinite loops when combined NoA
2718 * descriptors cover the full time period.
2719 */
2720 int max_tries = 5;
2721
2722 ieee80211_extend_absent_time(data, tsf, &offset);
2723 do {
2724 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2725 break;
2726
2727 tries++;
2728 } while (tries < max_tries);
2729
2730 return offset;
2731}
2732
2733void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2734{
2735 u32 next_offset = BIT(31) - 1;
2736 int i;
2737
2738 data->absent = 0;
2739 data->has_next_tsf = false;
2740 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2741 s32 start;
2742
2743 if (!data->count[i])
2744 continue;
2745
2746 ieee80211_extend_noa_desc(data, tsf, i);
2747 start = data->desc[i].start - tsf;
2748 if (start <= 0)
2749 data->absent |= BIT(i);
2750
2751 if (next_offset > start)
2752 next_offset = start;
2753
2754 data->has_next_tsf = true;
2755 }
2756
2757 if (data->absent)
2758 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2759
2760 data->next_tsf = tsf + next_offset;
2761}
2762EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2763
2764int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2765 struct ieee80211_noa_data *data, u32 tsf)
2766{
2767 int ret = 0;
2768 int i;
2769
2770 memset(data, 0, sizeof(*data));
2771
2772 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2773 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2774
2775 if (!desc->count || !desc->duration)
2776 continue;
2777
2778 data->count[i] = desc->count;
2779 data->desc[i].start = le32_to_cpu(desc->start_time);
2780 data->desc[i].duration = le32_to_cpu(desc->duration);
2781 data->desc[i].interval = le32_to_cpu(desc->interval);
2782
2783 if (data->count[i] > 1 &&
2784 data->desc[i].interval < data->desc[i].duration)
2785 continue;
2786
2787 ieee80211_extend_noa_desc(data, tsf, i);
2788 ret++;
2789 }
2790
2791 if (ret)
2792 ieee80211_update_p2p_noa(data, tsf);
2793
2794 return ret;
2795}
2796EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 2797
2798void ieee80211_recalc_dtim(struct ieee80211_local *local,
2799 struct ieee80211_sub_if_data *sdata)
2800{
2801 u64 tsf = drv_get_tsf(local, sdata);
2802 u64 dtim_count = 0;
2803 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2804 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2805 struct ps_data *ps;
2806 u8 bcns_from_dtim;
2807
2808 if (tsf == -1ULL || !beacon_int || !dtim_period)
2809 return;
2810
2811 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2812 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2813 if (!sdata->bss)
2814 return;
2815
2816 ps = &sdata->bss->ps;
2817 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2818 ps = &sdata->u.mesh.ps;
2819 } else {
2820 return;
2821 }
2822
2823 /*
2824 * actually finds last dtim_count, mac80211 will update in
2825 * __beacon_add_tim().
2826 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2827 */
2828 do_div(tsf, beacon_int);
2829 bcns_from_dtim = do_div(tsf, dtim_period);
2830 /* just had a DTIM */
2831 if (!bcns_from_dtim)
2832 dtim_count = 0;
2833 else
2834 dtim_count = dtim_period - bcns_from_dtim;
2835
2836 ps->dtim_count = dtim_count;
2837}
73de86a3
LC		 2838
2839int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2840 const struct cfg80211_chan_def *chandef,
2841 enum ieee80211_chanctx_mode chanmode,
2842 u8 radar_detect)
2843{
2844 struct ieee80211_local *local = sdata->local;
2845 struct ieee80211_sub_if_data *sdata_iter;
2846 enum nl80211_iftype iftype = sdata->wdev.iftype;
2847 int num[NUM_NL80211_IFTYPES];
2848 struct ieee80211_chanctx *ctx;
b6a55015 2849 int num_different_channels = 0;
73de86a3
LC		 2850 int total = 1;
2851
2852 lockdep_assert_held(&local->chanctx_mtx);
2853
2854 if (WARN_ON(hweight32(radar_detect) > 1))
2855 return -EINVAL;
2856
b6a55015
LC		 2857 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
2858 !chandef->chan))
73de86a3
LC		 2859 return -EINVAL;
2860
b6a55015
LC		 2861 if (chandef)
2862 num_different_channels = 1;
2863
73de86a3
LC		 2864 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
2865 return -EINVAL;
2866
2867 /* Always allow software iftypes */
2868 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
2869 if (radar_detect)
2870 return -EINVAL;
2871 return 0;
2872 }
2873
2874 memset(num, 0, sizeof(num));
2875
2876 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
2877 num[iftype] = 1;
2878
2879 list_for_each_entry(ctx, &local->chanctx_list, list) {
2880 if (ctx->conf.radar_enabled)
2881 radar_detect |= BIT(ctx->conf.def.width);
2882 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
2883 num_different_channels++;
2884 continue;
2885 }
b6a55015 2886 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 2887 cfg80211_chandef_compatible(chandef,
2888 &ctx->conf.def))
2889 continue;
2890 num_different_channels++;
2891 }
2892
2893 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
2894 struct wireless_dev *wdev_iter;
2895
2896 wdev_iter = &sdata_iter->wdev;
2897
2898 if (sdata_iter == sdata ||
2899 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
2900 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
2901 continue;
2902
2903 num[wdev_iter->iftype]++;
2904 total++;
2905 }
2906
2907 if (total == 1 && !radar_detect)
2908 return 0;
2909
2910 return cfg80211_check_combinations(local->hw.wiphy,
2911 num_different_channels,
2912 radar_detect, num);
2913}
6fa001bc
MK		 2914
2915static void
2916ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
2917 void *data)
2918{
2919 u32 *max_num_different_channels = data;
2920
2921 *max_num_different_channels = max(*max_num_different_channels,
2922 c->num_different_channels);
2923}
2924
2925int ieee80211_max_num_channels(struct ieee80211_local *local)
2926{
2927 struct ieee80211_sub_if_data *sdata;
2928 int num[NUM_NL80211_IFTYPES] = {};
2929 struct ieee80211_chanctx *ctx;
2930 int num_different_channels = 0;
2931 u8 radar_detect = 0;
2932 u32 max_num_different_channels = 1;
2933 int err;
2934
2935 lockdep_assert_held(&local->chanctx_mtx);
2936
2937 list_for_each_entry(ctx, &local->chanctx_list, list) {
2938 num_different_channels++;
2939
2940 if (ctx->conf.radar_enabled)
2941 radar_detect |= BIT(ctx->conf.def.width);
2942 }
2943
2944 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2945 num[sdata->wdev.iftype]++;
2946
2947 err = cfg80211_iter_combinations(local->hw.wiphy,
2948 num_different_channels, radar_detect,
2949 num, ieee80211_iter_max_chans,
2950 &max_num_different_channels);
2951 if (err < 0)
2952 return err;
2953
2954 return max_num_different_channels;
2955}
Linux 6.x block layer and io_uring tree(s)