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mac80211: add stations in order to the station list
[linux-2.6-block.git] / net / mac80211 / util.c
CommitLineData
c2d1560a
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
d98ad83e 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
c2d1560a
JB		 7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15#include <net/mac80211.h>
16#include <linux/netdevice.h>
bc3b2d7f 17#include <linux/export.h>
c2d1560a
JB		 18#include <linux/types.h>
19#include <linux/slab.h>
20#include <linux/skbuff.h>
21#include <linux/etherdevice.h>
22#include <linux/if_arp.h>
c2d1560a 23#include <linux/bitmap.h>
dd76986b 24#include <linux/crc32.h>
881d966b 25#include <net/net_namespace.h>
c2d1560a 26#include <net/cfg80211.h>
dabeb344 27#include <net/rtnetlink.h>
c2d1560a
JB		 28
29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7 31#include "rate.h"
ee385855 32#include "mesh.h"
c2d1560a 33#include "wme.h"
f2753ddb 34#include "led.h"
fffd0934 35#include "wep.h"
c2d1560a
JB		 36
37/* privid for wiphys to determine whether they belong to us or not */
8a47cea7 38const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
c2d1560a 39
9a95371a
LR		 40struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41{
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47}
48EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
c2d1560a 49
71364716 50u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
05c914fe 51 enum nl80211_iftype type)
c2d1560a 52{
a494bb1c 53 __le16 fc = hdr->frame_control;
c2d1560a 54
98f0b0a3
RR		 55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
c2d1560a
JB		 57 return NULL;
58
a494bb1c 59 if (ieee80211_is_data(fc)) {
98f0b0a3
RR		 60 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
a494bb1c
HH		 62
63 if (ieee80211_has_a4(fc))
c2d1560a 64 return NULL;
a494bb1c
HH		 65 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
c2d1560a 68 return hdr->addr2;
a494bb1c
HH		 69
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
98f0b0a3
RR		 74 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
c2d1560a 76 return hdr->addr3;
a494bb1c
HH		 77 }
78
79 if (ieee80211_is_ctl(fc)) {
f359d3fe 80 if (ieee80211_is_pspoll(fc))
c2d1560a 81 return hdr->addr1;
a494bb1c
HH		 82
83 if (ieee80211_is_back_req(fc)) {
71364716 84 switch (type) {
05c914fe 85 case NL80211_IFTYPE_STATION:
71364716 86 return hdr->addr2;
05c914fe
JB		 87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
71364716
RR		 89 return hdr->addr1;
90 default:
a494bb1c 91 break; /* fall through to the return */
71364716
RR		 92 }
93 }
c2d1560a
JB		 94 }
95
96 return NULL;
97}
98
5cf121c3 99void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
c2d1560a 100{
252b86c4 101 struct sk_buff *skb;
2de8e0d9
JB		 102 struct ieee80211_hdr *hdr;
103
252b86c4 104 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9
JB		 105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
252b86c4 107 }
c2d1560a
JB		 108}
109
4ee73f33 110int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
438b61b7
SW		 111 int rate, int erp, int short_preamble,
112 int shift)
c2d1560a
JB		 113{
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
438b61b7
SW		 123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
c2d1560a
JB		 126 */
127
4ee73f33 128 if (band == IEEE80211_BAND_5GHZ || erp) {
c2d1560a
JB		 129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
438b61b7 138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
c2d1560a
JB		 139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
c2d1560a 142 dur = 16; /* SIFS + signal ext */
438b61b7
SW		 143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
438b61b7
SW		 145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
2103dec1
SW		 151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
c2d1560a
JB		 157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175}
176
177/* Exported duration function for driver use */
32bfd35d
JB		 178__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
4ee73f33 180 enum ieee80211_band band,
8318d78a
JB		 181 size_t frame_len,
182 struct ieee80211_rate *rate)
c2d1560a 183{
25d834e1 184 struct ieee80211_sub_if_data *sdata;
c2d1560a 185 u16 dur;
438b61b7 186 int erp, shift = 0;
25d834e1 187 bool short_preamble = false;
c2d1560a 188
8318d78a 189 erp = 0;
25d834e1
JB		 190 if (vif) {
191 sdata = vif_to_sdata(vif);
bda3933a 192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 195 shift = ieee80211_vif_get_shift(vif);
25d834e1 196 }
8318d78a 197
4ee73f33 198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
438b61b7 199 short_preamble, shift);
c2d1560a
JB		 200
201 return cpu_to_le16(dur);
202}
203EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
32bfd35d
JB		 205__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
e039fa4a 207 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 208{
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
25d834e1 211 struct ieee80211_sub_if_data *sdata;
471b3efd 212 bool short_preamble;
2103dec1 213 int erp, shift = 0, bitrate;
c2d1560a 214 u16 dur;
2e92e6f2
JB		 215 struct ieee80211_supported_band *sband;
216
4ee73f33 217 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 218
25d834e1 219 short_preamble = false;
7e9ed188 220
e039fa4a 221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a
JB		 222
223 erp = 0;
25d834e1
JB		 224 if (vif) {
225 sdata = vif_to_sdata(vif);
bda3933a 226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 229 shift = ieee80211_vif_get_shift(vif);
25d834e1 230 }
c2d1560a 231
2103dec1
SW		 232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
c2d1560a 234 /* CTS duration */
2103dec1 235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 236 erp, short_preamble, shift);
c2d1560a 237 /* Data frame duration */
2103dec1 238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 239 erp, short_preamble, shift);
c2d1560a 240 /* ACK duration */
2103dec1 241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 242 erp, short_preamble, shift);
c2d1560a
JB		 243
244 return cpu_to_le16(dur);
245}
246EXPORT_SYMBOL(ieee80211_rts_duration);
247
32bfd35d
JB		 248__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
c2d1560a 250 size_t frame_len,
e039fa4a 251 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 252{
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
25d834e1 255 struct ieee80211_sub_if_data *sdata;
471b3efd 256 bool short_preamble;
2103dec1 257 int erp, shift = 0, bitrate;
c2d1560a 258 u16 dur;
2e92e6f2
JB		 259 struct ieee80211_supported_band *sband;
260
4ee73f33 261 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 262
25d834e1 263 short_preamble = false;
7e9ed188 264
e039fa4a 265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a 266 erp = 0;
25d834e1
JB		 267 if (vif) {
268 sdata = vif_to_sdata(vif);
bda3933a 269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 272 shift = ieee80211_vif_get_shift(vif);
25d834e1 273 }
c2d1560a 274
2103dec1
SW		 275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
c2d1560a 277 /* Data frame duration */
2103dec1 278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 279 erp, short_preamble, shift);
e039fa4a 280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
c2d1560a 281 /* ACK duration */
2103dec1 282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 283 erp, short_preamble, shift);
c2d1560a
JB		 284 }
285
286 return cpu_to_le16(dur);
287}
288EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
3a25a8c8
JB		 290void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291{
292 struct ieee80211_sub_if_data *sdata;
a6f38ac3
JB		 293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
3a25a8c8
JB		 297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
f142c6b9
JB		 301 if (!sdata->dev)
302 continue;
303
3a25a8c8
JB		 304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
a6f38ac3 308 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 309 int ac_queue = sdata->vif.hw_queue[ac];
310
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318}
319
ce7c9111 320static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 321 enum queue_stop_reason reason,
322 bool refcounted)
c2d1560a
JB		 323{
324 struct ieee80211_local *local = hw_to_local(hw);
325
b5878a2d
JB		 326 trace_wake_queue(local, queue, reason);
327
e4e72fb4
JB		 328 if (WARN_ON(queue >= hw->queues))
329 return;
ce7c9111 330
ada15125
JB		 331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
cca07b00
LC		 334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
96f5e66e
JB		 341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
7236fe29
JB		 346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
3a25a8c8 348 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 349 rcu_read_unlock();
350 } else
3b8d81e0 351 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 352}
ce7c9111 353
96f5e66e 354void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 355 enum queue_stop_reason reason,
356 bool refcounted)
ce7c9111
KV		 357{
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364}
365
366void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367{
368 ieee80211_wake_queue_by_reason(hw, queue,
cca07b00
LC		 369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
ce7c9111 371}
c2d1560a
JB		 372EXPORT_SYMBOL(ieee80211_wake_queue);
373
ce7c9111 374static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 375 enum queue_stop_reason reason,
376 bool refcounted)
c2d1560a
JB		 377{
378 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 379 struct ieee80211_sub_if_data *sdata;
a6f38ac3 380 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 381
b5878a2d
JB		 382 trace_stop_queue(local, queue, reason);
383
e4e72fb4
JB		 384 if (WARN_ON(queue >= hw->queues))
385 return;
96f5e66e 386
cca07b00
LC		 387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
ada15125 391
cca07b00
LC		 392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
cf0277e7 394
a6f38ac3
JB		 395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
cf0277e7 398 rcu_read_lock();
3a25a8c8
JB		 399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
f142c6b9
JB		 402 if (!sdata->dev)
403 continue;
404
a6f38ac3 405 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
cf0277e7 411 rcu_read_unlock();
c2d1560a 412}
ce7c9111 413
96f5e66e 414void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 415 enum queue_stop_reason reason,
416 bool refcounted)
ce7c9111
KV		 417{
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424}
425
426void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427{
428 ieee80211_stop_queue_by_reason(hw, queue,
cca07b00
LC		 429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
ce7c9111 431}
c2d1560a
JB		 432EXPORT_SYMBOL(ieee80211_stop_queue);
433
8f77f384
JB		 434void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436{
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
a7bc376c 439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 440 int queue = info->hw_queue;
a7bc376c
JB		 441
442 if (WARN_ON(!info->control.vif)) {
d4fa14cd 443 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 444 return;
445 }
8f77f384
JB		 446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00
LC		 448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
3b8d81e0 450 __skb_queue_tail(&local->pending[queue], skb);
cca07b00
LC		 451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
8f77f384
JB		 453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454}
455
e3685e03
JB		 456void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
8f77f384
JB		 458{
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
b0b97a8a 462 int queue, i;
8f77f384
JB		 463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 465 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
d4fa14cd 469 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 470 continue;
471 }
472
3a25a8c8 473 queue = info->hw_queue;
4644ae89
JB		 474
475 __ieee80211_stop_queue(hw, queue,
cca07b00
LC		 476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
4644ae89 478
3b8d81e0 479 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 480 }
481
3b8d81e0 482 for (i = 0; i < hw->queues; i++)
8f77f384 483 __ieee80211_wake_queue(hw, i,
cca07b00
LC		 484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
8f77f384 486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 487}
488
ce7c9111 489void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 490 unsigned long queues,
cca07b00
LC		 491 enum queue_stop_reason reason,
492 bool refcounted)
c2d1560a 493{
ce7c9111
KV		 494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
c2d1560a
JB		 496 int i;
497
ce7c9111
KV		 498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
445ea4e8 500 for_each_set_bit(i, &queues, hw->queues)
cca07b00 501 __ieee80211_stop_queue(hw, i, reason, refcounted);
ce7c9111
KV		 502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504}
505
506void ieee80211_stop_queues(struct ieee80211_hw *hw)
507{
445ea4e8 508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
c2d1560a
JB		 511}
512EXPORT_SYMBOL(ieee80211_stop_queues);
513
92ab8535
TW		 514int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515{
516 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 517 unsigned long flags;
518 int ret;
96f5e66e 519
e4e72fb4
JB		 520 if (WARN_ON(queue >= hw->queues))
521 return true;
96f5e66e 522
3b8d81e0 523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
92ab8535
TW		 528}
529EXPORT_SYMBOL(ieee80211_queue_stopped);
530
ce7c9111 531void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 532 unsigned long queues,
cca07b00
LC		 533 enum queue_stop_reason reason,
534 bool refcounted)
c2d1560a 535{
ce7c9111
KV		 536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
c2d1560a
JB		 538 int i;
539
ce7c9111
KV		 540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
445ea4e8 542 for_each_set_bit(i, &queues, hw->queues)
cca07b00 543 __ieee80211_wake_queue(hw, i, reason, refcounted);
ce7c9111
KV		 544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546}
547
548void ieee80211_wake_queues(struct ieee80211_hw *hw)
549{
445ea4e8 550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
c2d1560a
JB		 553}
554EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 555
26da23b6
LC		 556static unsigned int
557ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
39ecc01d 559{
26da23b6 560 unsigned int queues;
39ecc01d
JB		 561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
26da23b6
LC		 576 return queues;
577}
578
579void ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata)
581{
582 unsigned int queues;
583
584 if (!local->ops->flush)
585 return;
586
587 queues = ieee80211_get_vif_queues(local, sdata);
588
59f48fe2 589 ieee80211_stop_queues_by_reason(&local->hw, queues,
cca07b00
LC		 590 IEEE80211_QUEUE_STOP_REASON_FLUSH,
591 false);
445ea4e8 592
77be2c54 593 drv_flush(local, sdata, queues, false);
445ea4e8 594
59f48fe2 595 ieee80211_wake_queues_by_reason(&local->hw, queues,
cca07b00
LC		 596 IEEE80211_QUEUE_STOP_REASON_FLUSH,
597 false);
39ecc01d
JB		 598}
599
26da23b6
LC		 600void ieee80211_stop_vif_queues(struct ieee80211_local *local,
601 struct ieee80211_sub_if_data *sdata,
602 enum queue_stop_reason reason)
603{
604 ieee80211_stop_queues_by_reason(&local->hw,
605 ieee80211_get_vif_queues(local, sdata),
606 reason, true);
607}
608
609void ieee80211_wake_vif_queues(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata,
611 enum queue_stop_reason reason)
612{
613 ieee80211_wake_queues_by_reason(&local->hw,
614 ieee80211_get_vif_queues(local, sdata),
615 reason, true);
616}
617
c7c71066
JB		 618static void __iterate_active_interfaces(struct ieee80211_local *local,
619 u32 iter_flags,
620 void (*iterator)(void *data, u8 *mac,
621 struct ieee80211_vif *vif),
622 void *data)
dabeb344 623{
dabeb344
JB		 624 struct ieee80211_sub_if_data *sdata;
625
c7c71066 626 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 627 switch (sdata->vif.type) {
05c914fe 628 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 629 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
630 continue;
631 break;
05c914fe 632 case NL80211_IFTYPE_AP_VLAN:
2f561feb 633 continue;
2ca27bcf 634 default:
2f561feb
ID		 635 break;
636 }
8b2c9824
JB		 637 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
638 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
639 continue;
9607e6b6 640 if (ieee80211_sdata_running(sdata))
47846c9b 641 iterator(data, sdata->vif.addr,
2f561feb
ID		 642 &sdata->vif);
643 }
644
c7c71066
JB		 645 sdata = rcu_dereference_check(local->monitor_sdata,
646 lockdep_is_held(&local->iflist_mtx) ||
647 lockdep_rtnl_is_held());
8b2c9824
JB		 648 if (sdata &&
649 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
650 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 651 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 652}
685fb72b 653
c7c71066
JB		 654void ieee80211_iterate_active_interfaces(
655 struct ieee80211_hw *hw, u32 iter_flags,
656 void (*iterator)(void *data, u8 *mac,
657 struct ieee80211_vif *vif),
658 void *data)
659{
660 struct ieee80211_local *local = hw_to_local(hw);
661
662 mutex_lock(&local->iflist_mtx);
663 __iterate_active_interfaces(local, iter_flags, iterator, data);
c771c9d8 664 mutex_unlock(&local->iflist_mtx);
2f561feb
ID		 665}
666EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
667
668void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 669 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 670 void (*iterator)(void *data, u8 *mac,
671 struct ieee80211_vif *vif),
672 void *data)
673{
674 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 675
e38bad47 676 rcu_read_lock();
c7c71066
JB		 677 __iterate_active_interfaces(local, iter_flags, iterator, data);
678 rcu_read_unlock();
679}
680EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 681
c7c71066
JB		 682void ieee80211_iterate_active_interfaces_rtnl(
683 struct ieee80211_hw *hw, u32 iter_flags,
684 void (*iterator)(void *data, u8 *mac,
685 struct ieee80211_vif *vif),
686 void *data)
687{
688 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 689
c7c71066 690 ASSERT_RTNL();
685fb72b 691
c7c71066 692 __iterate_active_interfaces(local, iter_flags, iterator, data);
dabeb344 693}
c7c71066 694EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 695
ad7e718c
JB		 696struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
697{
698 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
699
700 if (!ieee80211_sdata_running(sdata) ||
701 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
702 return NULL;
703 return &sdata->vif;
704}
705EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
706
42935eca
LR		 707/*
708 * Nothing should have been stuffed into the workqueue during
709 * the suspend->resume cycle. If this WARN is seen then there
710 * is a bug with either the driver suspend or something in
711 * mac80211 stuffing into the workqueue which we haven't yet
712 * cleared during mac80211's suspend cycle.
713 */
714static bool ieee80211_can_queue_work(struct ieee80211_local *local)
715{
ceb99fe0
JB		 716 if (WARN(local->suspended && !local->resuming,
717 "queueing ieee80211 work while going to suspend\n"))
718 return false;
42935eca
LR		 719
720 return true;
721}
722
723void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
724{
725 struct ieee80211_local *local = hw_to_local(hw);
726
727 if (!ieee80211_can_queue_work(local))
728 return;
729
730 queue_work(local->workqueue, work);
731}
732EXPORT_SYMBOL(ieee80211_queue_work);
733
734void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
735 struct delayed_work *dwork,
736 unsigned long delay)
737{
738 struct ieee80211_local *local = hw_to_local(hw);
739
740 if (!ieee80211_can_queue_work(local))
741 return;
742
743 queue_delayed_work(local->workqueue, dwork, delay);
744}
745EXPORT_SYMBOL(ieee80211_queue_delayed_work);
746
35d865af 747u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 748 struct ieee802_11_elems *elems,
749 u64 filter, u32 crc)
750{
751 size_t left = len;
35d865af 752 const u8 *pos = start;
dd76986b 753 bool calc_crc = filter != 0;
fcff4f10 754 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 755 const u8 *ie;
dd76986b 756
fcff4f10 757 bitmap_zero(seen_elems, 256);
dd76986b
JB		 758 memset(elems, 0, sizeof(*elems));
759 elems->ie_start = start;
760 elems->total_len = len;
761
762 while (left >= 2) {
763 u8 id, elen;
fcff4f10 764 bool elem_parse_failed;
dd76986b
JB		 765
766 id = *pos++;
767 elen = *pos++;
768 left -= 2;
769
fcff4f10
PS		 770 if (elen > left) {
771 elems->parse_error = true;
dd76986b 772 break;
fcff4f10
PS		 773 }
774
9690fb16
JB		 775 switch (id) {
776 case WLAN_EID_SSID:
777 case WLAN_EID_SUPP_RATES:
778 case WLAN_EID_FH_PARAMS:
779 case WLAN_EID_DS_PARAMS:
780 case WLAN_EID_CF_PARAMS:
781 case WLAN_EID_TIM:
782 case WLAN_EID_IBSS_PARAMS:
783 case WLAN_EID_CHALLENGE:
784 case WLAN_EID_RSN:
785 case WLAN_EID_ERP_INFO:
786 case WLAN_EID_EXT_SUPP_RATES:
787 case WLAN_EID_HT_CAPABILITY:
788 case WLAN_EID_HT_OPERATION:
789 case WLAN_EID_VHT_CAPABILITY:
790 case WLAN_EID_VHT_OPERATION:
791 case WLAN_EID_MESH_ID:
792 case WLAN_EID_MESH_CONFIG:
793 case WLAN_EID_PEER_MGMT:
794 case WLAN_EID_PREQ:
795 case WLAN_EID_PREP:
796 case WLAN_EID_PERR:
797 case WLAN_EID_RANN:
798 case WLAN_EID_CHANNEL_SWITCH:
799 case WLAN_EID_EXT_CHANSWITCH_ANN:
800 case WLAN_EID_COUNTRY:
801 case WLAN_EID_PWR_CONSTRAINT:
802 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 803 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 804 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 805 case WLAN_EID_CHAN_SWITCH_PARAM:
b2e506bf
JB		 806 /*
807 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
808 * that if the content gets bigger it might be needed more than once
809 */
9690fb16
JB		 810 if (test_bit(id, seen_elems)) {
811 elems->parse_error = true;
812 left -= elen;
813 pos += elen;
814 continue;
815 }
816 break;
fcff4f10 817 }
dd76986b
JB		 818
819 if (calc_crc && id < 64 && (filter & (1ULL << id)))
820 crc = crc32_be(crc, pos - 2, elen + 2);
821
fcff4f10
PS		 822 elem_parse_failed = false;
823
dd76986b
JB		 824 switch (id) {
825 case WLAN_EID_SSID:
826 elems->ssid = pos;
827 elems->ssid_len = elen;
828 break;
829 case WLAN_EID_SUPP_RATES:
830 elems->supp_rates = pos;
831 elems->supp_rates_len = elen;
832 break;
dd76986b 833 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 834 if (elen >= 1)
835 elems->ds_params = pos;
836 else
837 elem_parse_failed = true;
dd76986b 838 break;
dd76986b
JB		 839 case WLAN_EID_TIM:
840 if (elen >= sizeof(struct ieee80211_tim_ie)) {
841 elems->tim = (void *)pos;
842 elems->tim_len = elen;
fcff4f10
PS		 843 } else
844 elem_parse_failed = true;
dd76986b 845 break;
dd76986b
JB		 846 case WLAN_EID_CHALLENGE:
847 elems->challenge = pos;
848 elems->challenge_len = elen;
849 break;
850 case WLAN_EID_VENDOR_SPECIFIC:
851 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
852 pos[2] == 0xf2) {
853 /* Microsoft OUI (00:50:F2) */
854
855 if (calc_crc)
856 crc = crc32_be(crc, pos - 2, elen + 2);
857
441a33ba 858 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 859 /* OUI Type 2 - WMM IE */
860 if (pos[4] == 0) {
861 elems->wmm_info = pos;
862 elems->wmm_info_len = elen;
863 } else if (pos[4] == 1) {
864 elems->wmm_param = pos;
865 elems->wmm_param_len = elen;
866 }
867 }
868 }
869 break;
870 case WLAN_EID_RSN:
871 elems->rsn = pos;
872 elems->rsn_len = elen;
873 break;
874 case WLAN_EID_ERP_INFO:
1946bed9
JB		 875 if (elen >= 1)
876 elems->erp_info = pos;
877 else
878 elem_parse_failed = true;
dd76986b
JB		 879 break;
880 case WLAN_EID_EXT_SUPP_RATES:
881 elems->ext_supp_rates = pos;
882 elems->ext_supp_rates_len = elen;
883 break;
884 case WLAN_EID_HT_CAPABILITY:
885 if (elen >= sizeof(struct ieee80211_ht_cap))
886 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 887 else
888 elem_parse_failed = true;
dd76986b 889 break;
074d46d1
JB		 890 case WLAN_EID_HT_OPERATION:
891 if (elen >= sizeof(struct ieee80211_ht_operation))
892 elems->ht_operation = (void *)pos;
fcff4f10
PS		 893 else
894 elem_parse_failed = true;
dd76986b 895 break;
818255ea
MP		 896 case WLAN_EID_VHT_CAPABILITY:
897 if (elen >= sizeof(struct ieee80211_vht_cap))
898 elems->vht_cap_elem = (void *)pos;
899 else
900 elem_parse_failed = true;
901 break;
902 case WLAN_EID_VHT_OPERATION:
903 if (elen >= sizeof(struct ieee80211_vht_operation))
904 elems->vht_operation = (void *)pos;
905 else
906 elem_parse_failed = true;
907 break;
bee7f586
JB		 908 case WLAN_EID_OPMODE_NOTIF:
909 if (elen > 0)
910 elems->opmode_notif = pos;
911 else
912 elem_parse_failed = true;
913 break;
dd76986b
JB		 914 case WLAN_EID_MESH_ID:
915 elems->mesh_id = pos;
916 elems->mesh_id_len = elen;
917 break;
918 case WLAN_EID_MESH_CONFIG:
919 if (elen >= sizeof(struct ieee80211_meshconf_ie))
920 elems->mesh_config = (void *)pos;
fcff4f10
PS		 921 else
922 elem_parse_failed = true;
dd76986b
JB		 923 break;
924 case WLAN_EID_PEER_MGMT:
925 elems->peering = pos;
926 elems->peering_len = elen;
927 break;
3f52b7e3
MP		 928 case WLAN_EID_MESH_AWAKE_WINDOW:
929 if (elen >= 2)
930 elems->awake_window = (void *)pos;
931 break;
dd76986b
JB		 932 case WLAN_EID_PREQ:
933 elems->preq = pos;
934 elems->preq_len = elen;
935 break;
936 case WLAN_EID_PREP:
937 elems->prep = pos;
938 elems->prep_len = elen;
939 break;
940 case WLAN_EID_PERR:
941 elems->perr = pos;
942 elems->perr_len = elen;
943 break;
944 case WLAN_EID_RANN:
945 if (elen >= sizeof(struct ieee80211_rann_ie))
946 elems->rann = (void *)pos;
fcff4f10
PS		 947 else
948 elem_parse_failed = true;
dd76986b
JB		 949 break;
950 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 951 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
952 elem_parse_failed = true;
953 break;
954 }
955 elems->ch_switch_ie = (void *)pos;
dd76986b 956 break;
b4f286a1
JB		 957 case WLAN_EID_EXT_CHANSWITCH_ANN:
958 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
959 elem_parse_failed = true;
960 break;
961 }
962 elems->ext_chansw_ie = (void *)pos;
963 break;
85220d71
JB		 964 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
965 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
966 elem_parse_failed = true;
967 break;
968 }
969 elems->sec_chan_offs = (void *)pos;
970 break;
8f2535b9
CYY		 971 case WLAN_EID_CHAN_SWITCH_PARAM:
972 if (elen !=
973 sizeof(*elems->mesh_chansw_params_ie)) {
974 elem_parse_failed = true;
975 break;
976 }
977 elems->mesh_chansw_params_ie = (void *)pos;
978 break;
b2e506bf
JB		 979 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
980 if (!action ||
981 elen != sizeof(*elems->wide_bw_chansw_ie)) {
982 elem_parse_failed = true;
983 break;
984 }
985 elems->wide_bw_chansw_ie = (void *)pos;
986 break;
987 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
988 if (action) {
989 elem_parse_failed = true;
990 break;
991 }
992 /*
993 * This is a bit tricky, but as we only care about
994 * the wide bandwidth channel switch element, so
995 * just parse it out manually.
996 */
997 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
998 pos, elen);
999 if (ie) {
1000 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1001 elems->wide_bw_chansw_ie =
1002 (void *)(ie + 2);
1003 else
1004 elem_parse_failed = true;
1005 }
1006 break;
dd76986b
JB		 1007 case WLAN_EID_COUNTRY:
1008 elems->country_elem = pos;
1009 elems->country_elem_len = elen;
1010 break;
1011 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1012 if (elen != 1) {
1013 elem_parse_failed = true;
1014 break;
1015 }
dd76986b 1016 elems->pwr_constr_elem = pos;
dd76986b 1017 break;
c8d65917
SG		 1018 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1019 /* Lots of different options exist, but we only care
1020 * about the Dynamic Transmit Power Control element.
1021 * First check for the Cisco OUI, then for the DTPC
1022 * tag (0x00).
1023 */
1024 if (elen < 4) {
1025 elem_parse_failed = true;
1026 break;
1027 }
1028
1029 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1030 pos[2] != 0x96 || pos[3] != 0x00)
1031 break;
1032
1033 if (elen != 6) {
1034 elem_parse_failed = true;
1035 break;
1036 }
1037
1038 if (calc_crc)
1039 crc = crc32_be(crc, pos - 2, elen + 2);
1040
1041 elems->cisco_dtpc_elem = pos;
1042 break;
dd76986b 1043 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1044 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1045 elems->timeout_int = (void *)pos;
1046 else
1047 elem_parse_failed = true;
dd76986b
JB		 1048 break;
1049 default:
1050 break;
1051 }
1052
fcff4f10
PS		 1053 if (elem_parse_failed)
1054 elems->parse_error = true;
1055 else
5df45690 1056 __set_bit(id, seen_elems);
fcff4f10 1057
dd76986b
JB		 1058 left -= elen;
1059 pos += elen;
1060 }
1061
fcff4f10
PS		 1062 if (left != 0)
1063 elems->parse_error = true;
1064
dd76986b
JB		 1065 return crc;
1066}
1067
3abead59
JB		 1068void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1069 bool bss_notify)
5825fe10
JB		 1070{
1071 struct ieee80211_local *local = sdata->local;
1072 struct ieee80211_tx_queue_params qparam;
55de908a 1073 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1074 int ac;
a8ce8544 1075 bool use_11b, enable_qos;
aa837e1d 1076 int aCWmin, aCWmax;
5825fe10
JB		 1077
1078 if (!local->ops->conf_tx)
1079 return;
1080
54bcbc69
JB		 1081 if (local->hw.queues < IEEE80211_NUM_ACS)
1082 return;
1083
5825fe10
JB		 1084 memset(&qparam, 0, sizeof(qparam));
1085
55de908a
JB		 1086 rcu_read_lock();
1087 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1088 use_11b = (chanctx_conf &&
4bf88530 1089 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1090 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1091 rcu_read_unlock();
5825fe10 1092
a8ce8544
SG		 1093 /*
1094 * By default disable QoS in STA mode for old access points, which do
1095 * not support 802.11e. New APs will provide proper queue parameters,
1096 * that we will configure later.
1097 */
1098 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1099
1f4ffde8
FZ		 1100 /* Set defaults according to 802.11-2007 Table 7-37 */
1101 aCWmax = 1023;
1102 if (use_11b)
1103 aCWmin = 31;
1104 else
1105 aCWmin = 15;
1106
1107 /* Confiure old 802.11b/g medium access rules. */
1108 qparam.cw_max = aCWmax;
1109 qparam.cw_min = aCWmin;
1110 qparam.txop = 0;
1111 qparam.aifs = 2;
aa837e1d 1112
1f4ffde8
FZ		 1113 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1114 /* Update if QoS is enabled. */
a8ce8544
SG		 1115 if (enable_qos) {
1116 switch (ac) {
1117 case IEEE80211_AC_BK:
1118 qparam.cw_max = aCWmax;
1119 qparam.cw_min = aCWmin;
1120 qparam.txop = 0;
1121 qparam.aifs = 7;
1122 break;
1123 /* never happens but let's not leave undefined */
1124 default:
1125 case IEEE80211_AC_BE:
1126 qparam.cw_max = aCWmax;
1127 qparam.cw_min = aCWmin;
1128 qparam.txop = 0;
1129 qparam.aifs = 3;
1130 break;
1131 case IEEE80211_AC_VI:
1132 qparam.cw_max = aCWmin;
1133 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1134 if (use_11b)
1135 qparam.txop = 6016/32;
1136 else
1137 qparam.txop = 3008/32;
1138 qparam.aifs = 2;
1139 break;
1140 case IEEE80211_AC_VO:
1141 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1142 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1143 if (use_11b)
1144 qparam.txop = 3264/32;
1145 else
1146 qparam.txop = 1504/32;
1147 qparam.aifs = 2;
1148 break;
1149 }
aa837e1d 1150 }
5825fe10 1151
ab13315a
KV		 1152 qparam.uapsd = false;
1153
54bcbc69
JB		 1154 sdata->tx_conf[ac] = qparam;
1155 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1156 }
e1b3ec1a 1157
f142c6b9
JB		 1158 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1159 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1160 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1161 if (bss_notify)
1162 ieee80211_bss_info_change_notify(sdata,
1163 BSS_CHANGED_QOS);
d9734979 1164 }
5825fe10 1165}
e50db65c 1166
46900298 1167void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1168 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1169 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1170 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1171 u32 tx_flags)
46900298
JB		 1172{
1173 struct ieee80211_local *local = sdata->local;
1174 struct sk_buff *skb;
1175 struct ieee80211_mgmt *mgmt;
fffd0934 1176 int err;
46900298 1177
15e230ab 1178 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1179 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1180 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1181 if (!skb)
46900298 1182 return;
d15b8459 1183
744462a9 1184 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1185
1186 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1187 memset(mgmt, 0, 24 + 6);
1188 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1189 IEEE80211_STYPE_AUTH);
efa6a09d 1190 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1191 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1192 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1193 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1194 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1195 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1196 if (extra)
1197 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1198
fffd0934
JB		 1199 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1200 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1201 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1202 WARN_ON(err);
1203 }
1204
1672c0e3
JB		 1205 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1206 tx_flags;
62ae67be 1207 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1208}
1209
6ae16775
AQ		 1210void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1211 const u8 *bssid, u16 stype, u16 reason,
1212 bool send_frame, u8 *frame_buf)
1213{
1214 struct ieee80211_local *local = sdata->local;
1215 struct sk_buff *skb;
1216 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1217
1218 /* build frame */
1219 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1220 mgmt->duration = 0; /* initialize only */
1221 mgmt->seq_ctrl = 0; /* initialize only */
1222 memcpy(mgmt->da, bssid, ETH_ALEN);
1223 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1224 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1225 /* u.deauth.reason_code == u.disassoc.reason_code */
1226 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1227
1228 if (send_frame) {
1229 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1230 IEEE80211_DEAUTH_FRAME_LEN);
1231 if (!skb)
1232 return;
1233
1234 skb_reserve(skb, local->hw.extra_tx_headroom);
1235
1236 /* copy in frame */
1237 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1238 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1239
1240 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1241 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1242 IEEE80211_SKB_CB(skb)->flags |=
1243 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1244
1245 ieee80211_tx_skb(sdata, skb);
1246 }
1247}
1248
c56ef672
DS		 1249static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1250 u8 *buffer, size_t buffer_len,
1251 const u8 *ie, size_t ie_len,
1252 enum ieee80211_band band,
1253 u32 rate_mask,
1254 struct cfg80211_chan_def *chandef,
1255 size_t *offset)
de95a54b
JB		 1256{
1257 struct ieee80211_supported_band *sband;
c604b9f2 1258 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1259 size_t noffset;
8e664fb3 1260 int supp_rates_len, i;
8dcb2003
JM		 1261 u8 rates[32];
1262 int num_rates;
1263 int ext_rates_len;
2103dec1
SW		 1264 int shift;
1265 u32 rate_flags;
de95a54b 1266
c56ef672
DS		 1267 *offset = 0;
1268
4d36ec58 1269 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1270 if (WARN_ON_ONCE(!sband))
1271 return 0;
de95a54b 1272
2103dec1
SW		 1273 rate_flags = ieee80211_chandef_rate_flags(chandef);
1274 shift = ieee80211_chandef_get_shift(chandef);
1275
8dcb2003
JM		 1276 num_rates = 0;
1277 for (i = 0; i < sband->n_bitrates; i++) {
1278 if ((BIT(i) & rate_mask) == 0)
1279 continue; /* skip rate */
2103dec1
SW		 1280 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1281 continue;
1282
1283 rates[num_rates++] =
1284 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1285 (1 << shift) * 5);
8dcb2003
JM		 1286 }
1287
1288 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1289
c604b9f2
JB		 1290 if (end - pos < 2 + supp_rates_len)
1291 goto out_err;
de95a54b 1292 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1293 *pos++ = supp_rates_len;
8dcb2003
JM		 1294 memcpy(pos, rates, supp_rates_len);
1295 pos += supp_rates_len;
8e664fb3
JB		 1296
1297 /* insert "request information" if in custom IEs */
1298 if (ie && ie_len) {
1299 static const u8 before_extrates[] = {
1300 WLAN_EID_SSID,
1301 WLAN_EID_SUPP_RATES,
1302 WLAN_EID_REQUEST,
1303 };
1304 noffset = ieee80211_ie_split(ie, ie_len,
1305 before_extrates,
1306 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1307 *offset);
1308 if (end - pos < noffset - *offset)
c604b9f2 1309 goto out_err;
c56ef672
DS		 1310 memcpy(pos, ie + *offset, noffset - *offset);
1311 pos += noffset - *offset;
1312 *offset = noffset;
8e664fb3
JB		 1313 }
1314
8dcb2003
JM		 1315 ext_rates_len = num_rates - supp_rates_len;
1316 if (ext_rates_len > 0) {
c604b9f2
JB		 1317 if (end - pos < 2 + ext_rates_len)
1318 goto out_err;
8e664fb3 1319 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1320 *pos++ = ext_rates_len;
1321 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1322 pos += ext_rates_len;
8e664fb3
JB		 1323 }
1324
2103dec1 1325 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1326 if (end - pos < 3)
1327 goto out_err;
651b5225
JM		 1328 *pos++ = WLAN_EID_DS_PARAMS;
1329 *pos++ = 1;
2103dec1
SW		 1330 *pos++ = ieee80211_frequency_to_channel(
1331 chandef->chan->center_freq);
651b5225
JM		 1332 }
1333
8e664fb3
JB		 1334 /* insert custom IEs that go before HT */
1335 if (ie && ie_len) {
1336 static const u8 before_ht[] = {
1337 WLAN_EID_SSID,
1338 WLAN_EID_SUPP_RATES,
1339 WLAN_EID_REQUEST,
1340 WLAN_EID_EXT_SUPP_RATES,
1341 WLAN_EID_DS_PARAMS,
1342 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1343 };
1344 noffset = ieee80211_ie_split(ie, ie_len,
1345 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1346 *offset);
1347 if (end - pos < noffset - *offset)
c604b9f2 1348 goto out_err;
c56ef672
DS		 1349 memcpy(pos, ie + *offset, noffset - *offset);
1350 pos += noffset - *offset;
1351 *offset = noffset;
de95a54b
JB		 1352 }
1353
c604b9f2
JB		 1354 if (sband->ht_cap.ht_supported) {
1355 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1356 goto out_err;
ef96a842
BG		 1357 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1358 sband->ht_cap.cap);
c604b9f2 1359 }
5ef2d41a 1360
de95a54b
JB		 1361 /*
1362 * If adding more here, adjust code in main.c
1363 * that calculates local->scan_ies_len.
1364 */
1365
4d952300 1366 /* insert custom IEs that go before VHT */
8e664fb3 1367 if (ie && ie_len) {
4d952300
JB		 1368 static const u8 before_vht[] = {
1369 WLAN_EID_SSID,
1370 WLAN_EID_SUPP_RATES,
1371 WLAN_EID_REQUEST,
1372 WLAN_EID_EXT_SUPP_RATES,
1373 WLAN_EID_DS_PARAMS,
1374 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1375 WLAN_EID_HT_CAPABILITY,
1376 WLAN_EID_BSS_COEX_2040,
1377 WLAN_EID_EXT_CAPABILITY,
1378 WLAN_EID_SSID_LIST,
1379 WLAN_EID_CHANNEL_USAGE,
1380 WLAN_EID_INTERWORKING,
1381 /* mesh ID can't happen here */
1382 /* 60 GHz can't happen here right now */
1383 };
1384 noffset = ieee80211_ie_split(ie, ie_len,
1385 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1386 *offset);
1387 if (end - pos < noffset - *offset)
c604b9f2 1388 goto out_err;
c56ef672
DS		 1389 memcpy(pos, ie + *offset, noffset - *offset);
1390 pos += noffset - *offset;
1391 *offset = noffset;
de95a54b
JB		 1392 }
1393
c604b9f2
JB		 1394 if (sband->vht_cap.vht_supported) {
1395 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1396 goto out_err;
ba0afa2f
MP		 1397 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1398 sband->vht_cap.cap);
c604b9f2 1399 }
ba0afa2f 1400
c604b9f2
JB		 1401 return pos - buffer;
1402 out_err:
1403 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1404 return pos - buffer;
1405}
1406
c56ef672
DS		 1407int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1408 size_t buffer_len,
1409 struct ieee80211_scan_ies *ie_desc,
1410 const u8 *ie, size_t ie_len,
1411 u8 bands_used, u32 *rate_masks,
1412 struct cfg80211_chan_def *chandef)
1413{
1414 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1415 int i;
1416
1417 memset(ie_desc, 0, sizeof(*ie_desc));
1418
1419 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1420 if (bands_used & BIT(i)) {
1421 pos += ieee80211_build_preq_ies_band(local,
1422 buffer + pos,
1423 buffer_len - pos,
1424 ie, ie_len, i,
1425 rate_masks[i],
1426 chandef,
1427 &custom_ie_offset);
1428 ie_desc->ies[i] = buffer + old_pos;
1429 ie_desc->len[i] = pos - old_pos;
1430 old_pos = pos;
1431 }
1432 }
1433
1434 /* add any remaining custom IEs */
1435 if (ie && ie_len) {
1436 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1437 "not enough space for preq custom IEs\n"))
1438 return pos;
1439 memcpy(buffer + pos, ie + custom_ie_offset,
1440 ie_len - custom_ie_offset);
1441 ie_desc->common_ies = buffer + pos;
1442 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1443 pos += ie_len - custom_ie_offset;
1444 }
1445
1446 return pos;
1447};
1448
a619a4c0 1449struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
85a237fe 1450 u8 *dst, u32 ratemask,
6b77863b 1451 struct ieee80211_channel *chan,
a619a4c0 1452 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1453 const u8 *ie, size_t ie_len,
1454 bool directed)
46900298
JB		 1455{
1456 struct ieee80211_local *local = sdata->local;
2103dec1 1457 struct cfg80211_chan_def chandef;
46900298
JB		 1458 struct sk_buff *skb;
1459 struct ieee80211_mgmt *mgmt;
b9a9ada1 1460 int ies_len;
c56ef672
DS		 1461 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1462 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1463
a806c558
PS		 1464 /*
1465 * Do not send DS Channel parameter for directed probe requests
1466 * in order to maximize the chance that we get a response. Some
1467 * badly-behaved APs don't respond when this parameter is included.
1468 */
2103dec1 1469 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1470 if (directed)
2103dec1 1471 chandef.chan = NULL;
a806c558 1472 else
2103dec1 1473 chandef.chan = chan;
651b5225 1474
7c12ce8b 1475 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
b9a9ada1 1476 ssid, ssid_len, 100 + ie_len);
5b2bbf75 1477 if (!skb)
b9a9ada1
JB		 1478 return NULL;
1479
c56ef672 1480 rate_masks[chan->band] = ratemask;
b9a9ada1 1481 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1482 skb_tailroom(skb), &dummy_ie_desc,
1483 ie, ie_len, BIT(chan->band),
1484 rate_masks, &chandef);
b9a9ada1 1485 skb_put(skb, ies_len);
7c12ce8b 1486
46900298 1487 if (dst) {
7c12ce8b 1488 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1489 memcpy(mgmt->da, dst, ETH_ALEN);
1490 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1491 }
46900298 1492
62ae67be 1493 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1494
a619a4c0
JO		 1495 return skb;
1496}
1497
1498void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1499 const u8 *ssid, size_t ssid_len,
a806c558 1500 const u8 *ie, size_t ie_len,
1672c0e3 1501 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1502 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1503{
1504 struct sk_buff *skb;
1505
fe94fe05 1506 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
6b77863b 1507 ssid, ssid_len,
85a237fe 1508 ie, ie_len, directed);
aad14ceb 1509 if (skb) {
1672c0e3 1510 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1511 if (scan)
1512 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1513 else
1514 ieee80211_tx_skb(sdata, skb);
aad14ceb 1515 }
46900298
JB		 1516}
1517
2103dec1 1518u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1519 struct ieee802_11_elems *elems,
9ebb61a2 1520 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1521{
1522 struct ieee80211_supported_band *sband;
46900298 1523 size_t num_rates;
2103dec1
SW		 1524 u32 supp_rates, rate_flags;
1525 int i, j, shift;
1526 sband = sdata->local->hw.wiphy->bands[band];
1527
1528 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1529 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1530
4ee73f33
MK		 1531 if (WARN_ON(!sband))
1532 return 1;
46900298 1533
46900298
JB		 1534 num_rates = sband->n_bitrates;
1535 supp_rates = 0;
1536 for (i = 0; i < elems->supp_rates_len +
1537 elems->ext_supp_rates_len; i++) {
1538 u8 rate = 0;
1539 int own_rate;
9ebb61a2 1540 bool is_basic;
46900298
JB		 1541 if (i < elems->supp_rates_len)
1542 rate = elems->supp_rates[i];
1543 else if (elems->ext_supp_rates)
1544 rate = elems->ext_supp_rates
1545 [i - elems->supp_rates_len];
1546 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1547 is_basic = !!(rate & 0x80);
1548
1549 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1550 continue;
1551
1552 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1553 int brate;
1554 if ((rate_flags & sband->bitrates[j].flags)
1555 != rate_flags)
1556 continue;
1557
1558 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1559 1 << shift);
1560
1561 if (brate == own_rate) {
46900298 1562 supp_rates |= BIT(j);
9ebb61a2
AN		 1563 if (basic_rates && is_basic)
1564 *basic_rates |= BIT(j);
1565 }
1566 }
46900298
JB		 1567 }
1568 return supp_rates;
1569}
f2753ddb 1570
84f6a01c
JB		 1571void ieee80211_stop_device(struct ieee80211_local *local)
1572{
1573 ieee80211_led_radio(local, false);
67408c8c 1574 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1575
1576 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1577
1578 flush_workqueue(local->workqueue);
678f415f 1579 drv_stop(local);
84f6a01c
JB		 1580}
1581
f6837ba8
JB		 1582static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1583{
1584 struct ieee80211_sub_if_data *sdata;
1585 struct ieee80211_chanctx *ctx;
1586
1587 /*
1588 * We get here if during resume the device can't be restarted properly.
1589 * We might also get here if this happens during HW reset, which is a
1590 * slightly different situation and we need to drop all connections in
1591 * the latter case.
1592 *
1593 * Ask cfg80211 to turn off all interfaces, this will result in more
1594 * warnings but at least we'll then get into a clean stopped state.
1595 */
1596
1597 local->resuming = false;
1598 local->suspended = false;
1599 local->started = false;
1600
1601 /* scheduled scan clearly can't be running any more, but tell
1602 * cfg80211 and clear local state
1603 */
1604 ieee80211_sched_scan_end(local);
1605
1606 list_for_each_entry(sdata, &local->interfaces, list)
1607 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1608
1609 /* Mark channel contexts as not being in the driver any more to avoid
1610 * removing them from the driver during the shutdown process...
1611 */
1612 mutex_lock(&local->chanctx_mtx);
1613 list_for_each_entry(ctx, &local->chanctx_list, list)
1614 ctx->driver_present = false;
1615 mutex_unlock(&local->chanctx_mtx);
1616
1617 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1618}
1619
153a5fc4
SG		 1620static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1621 struct ieee80211_sub_if_data *sdata)
1622{
1623 struct ieee80211_chanctx_conf *conf;
1624 struct ieee80211_chanctx *ctx;
1625
1626 if (!local->use_chanctx)
1627 return;
1628
1629 mutex_lock(&local->chanctx_mtx);
1630 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1631 lockdep_is_held(&local->chanctx_mtx));
1632 if (conf) {
1633 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1634 drv_assign_vif_chanctx(local, sdata, ctx);
1635 }
1636 mutex_unlock(&local->chanctx_mtx);
1637}
1638
f2753ddb
JB		 1639int ieee80211_reconfig(struct ieee80211_local *local)
1640{
1641 struct ieee80211_hw *hw = &local->hw;
1642 struct ieee80211_sub_if_data *sdata;
55de908a 1643 struct ieee80211_chanctx *ctx;
f2753ddb 1644 struct sta_info *sta;
2683d65b 1645 int res, i;
d888130a 1646 bool reconfig_due_to_wowlan = false;
d43c6b6e
DS		 1647 struct ieee80211_sub_if_data *sched_scan_sdata;
1648 bool sched_scan_stopped = false;
d888130a 1649
8f21b0ad 1650#ifdef CONFIG_PM
ceb99fe0
JB		 1651 if (local->suspended)
1652 local->resuming = true;
f2753ddb 1653
eecc4800 1654 if (local->wowlan) {
eecc4800 1655 res = drv_resume(local);
27b3eb9c 1656 local->wowlan = false;
eecc4800
JB		 1657 if (res < 0) {
1658 local->resuming = false;
1659 return res;
1660 }
1661 if (res == 0)
1662 goto wake_up;
1663 WARN_ON(res > 1);
1664 /*
1665 * res is 1, which means the driver requested
1666 * to go through a regular reset on wakeup.
1667 */
d888130a 1668 reconfig_due_to_wowlan = true;
eecc4800
JB		 1669 }
1670#endif
94f9b97b
JB		 1671 /* everything else happens only if HW was up & running */
1672 if (!local->open_count)
1673 goto wake_up;
f2753ddb 1674
94f9b97b
JB		 1675 /*
1676 * Upon resume hardware can sometimes be goofy due to
1677 * various platform / driver / bus issues, so restarting
1678 * the device may at times not work immediately. Propagate
1679 * the error.
1680 */
1681 res = drv_start(local);
1682 if (res) {
f6837ba8
JB		 1683 if (local->suspended)
1684 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1685 else
1686 WARN(1, "Hardware became unavailable during restart.\n");
1687 ieee80211_handle_reconfig_failure(local);
94f9b97b 1688 return res;
f2753ddb
JB		 1689 }
1690
7f281975
YAP		 1691 /* setup fragmentation threshold */
1692 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1693
1694 /* setup RTS threshold */
1695 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1696
1697 /* reset coverage class */
1698 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1699
94f9b97b
JB		 1700 ieee80211_led_radio(local, true);
1701 ieee80211_mod_tpt_led_trig(local,
1702 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1703
f2753ddb 1704 /* add interfaces */
4b6f1dd6
JB		 1705 sdata = rtnl_dereference(local->monitor_sdata);
1706 if (sdata) {
3c3e21e7
JB		 1707 /* in HW restart it exists already */
1708 WARN_ON(local->resuming);
4b6f1dd6
JB		 1709 res = drv_add_interface(local, sdata);
1710 if (WARN_ON(res)) {
0c2bef46 1711 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1712 synchronize_net();
1713 kfree(sdata);
1714 }
1715 }
1716
f2753ddb
JB		 1717 list_for_each_entry(sdata, &local->interfaces, list) {
1718 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1719 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1720 ieee80211_sdata_running(sdata))
7b7eab6f 1721 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1722 }
1723
55de908a 1724 /* add channel contexts */
f0dea9c7
AS		 1725 if (local->use_chanctx) {
1726 mutex_lock(&local->chanctx_mtx);
1727 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1728 if (ctx->replace_state !=
1729 IEEE80211_CHANCTX_REPLACES_OTHER)
1730 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1731 mutex_unlock(&local->chanctx_mtx);
55de908a 1732
7df180f7
ZG		 1733 list_for_each_entry(sdata, &local->interfaces, list) {
1734 if (!ieee80211_sdata_running(sdata))
1735 continue;
1736 ieee80211_assign_chanctx(local, sdata);
1737 }
6352c87f 1738
7df180f7
ZG		 1739 sdata = rtnl_dereference(local->monitor_sdata);
1740 if (sdata && ieee80211_sdata_running(sdata))
1741 ieee80211_assign_chanctx(local, sdata);
1742 }
fe5f2559 1743
f2753ddb 1744 /* add STAs back */
34e89507
JB		 1745 mutex_lock(&local->sta_mtx);
1746 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1747 enum ieee80211_sta_state state;
f09603a2 1748
2e8d397e
AN		 1749 if (!sta->uploaded)
1750 continue;
1751
1752 /* AP-mode stations will be added later */
1753 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1754 continue;
1755
1756 for (state = IEEE80211_STA_NOTEXIST;
1757 state < sta->sta_state; state++)
1758 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1759 state + 1));
f2753ddb 1760 }
34e89507 1761 mutex_unlock(&local->sta_mtx);
f2753ddb 1762
2683d65b 1763 /* reconfigure tx conf */
54bcbc69
JB		 1764 if (hw->queues >= IEEE80211_NUM_ACS) {
1765 list_for_each_entry(sdata, &local->interfaces, list) {
1766 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1767 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1768 !ieee80211_sdata_running(sdata))
1769 continue;
f6f3def3 1770
54bcbc69
JB		 1771 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1772 drv_conf_tx(local, sdata, i,
1773 &sdata->tx_conf[i]);
1774 }
f6f3def3 1775 }
2683d65b 1776
f2753ddb
JB		 1777 /* reconfigure hardware */
1778 ieee80211_hw_config(local, ~0);
1779
f2753ddb 1780 ieee80211_configure_filter(local);
f2753ddb
JB		 1781
1782 /* Finally also reconfigure all the BSS information */
1783 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1784 u32 changed;
1785
9607e6b6 1786 if (!ieee80211_sdata_running(sdata))
f2753ddb 1787 continue;
ac8dd506
JB		 1788
1789 /* common change flags for all interface types */
1790 changed = BSS_CHANGED_ERP_CTS_PROT |
1791 BSS_CHANGED_ERP_PREAMBLE |
1792 BSS_CHANGED_ERP_SLOT |
1793 BSS_CHANGED_HT |
1794 BSS_CHANGED_BASIC_RATES |
1795 BSS_CHANGED_BEACON_INT |
1796 BSS_CHANGED_BSSID |
4ced3f74 1797 BSS_CHANGED_CQM |
55de47f6 1798 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1799 BSS_CHANGED_IDLE |
1800 BSS_CHANGED_TXPOWER;
ac8dd506 1801
f2753ddb
JB		 1802 switch (sdata->vif.type) {
1803 case NL80211_IFTYPE_STATION:
0d392e93 1804 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1805 BSS_CHANGED_ARP_FILTER |
1806 BSS_CHANGED_PS;
c65dd147 1807
989c6505
AB		 1808 /* Re-send beacon info report to the driver */
1809 if (sdata->u.mgd.have_beacon)
1810 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1811
8d61ffa5 1812 sdata_lock(sdata);
ac8dd506 1813 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1814 sdata_unlock(sdata);
ac8dd506 1815 break;
f2753ddb 1816 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1817 changed |= BSS_CHANGED_IBSS;
1818 /* fall through */
f2753ddb 1819 case NL80211_IFTYPE_AP:
339afbf4 1820 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1821
1041638f 1822 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1823 changed |= BSS_CHANGED_AP_PROBE_RESP;
1824
1041638f
JB		 1825 if (rcu_access_pointer(sdata->u.ap.beacon))
1826 drv_start_ap(local, sdata);
1827 }
1828
7827493b 1829 /* fall through */
f2753ddb 1830 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1831 if (sdata->vif.bss_conf.enable_beacon) {
1832 changed |= BSS_CHANGED_BEACON |
1833 BSS_CHANGED_BEACON_ENABLED;
1834 ieee80211_bss_info_change_notify(sdata, changed);
1835 }
f2753ddb
JB		 1836 break;
1837 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1838 case NL80211_IFTYPE_AP_VLAN:
1839 case NL80211_IFTYPE_MONITOR:
98104fde 1840 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1841 /* nothing to do */
f142c6b9 1842 break;
f2753ddb 1843 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1844 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1845 case NL80211_IFTYPE_P2P_CLIENT:
1846 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1847 WARN_ON(1);
1848 break;
1849 }
1850 }
1851
8e1b23b9
ES		 1852 ieee80211_recalc_ps(local, -1);
1853
6e1b1b24
EP		 1854 /*
1855 * The sta might be in psm against the ap (e.g. because
1856 * this was the state before a hw restart), so we
1857 * explicitly send a null packet in order to make sure
1858 * it'll sync against the ap (and get out of psm).
1859 */
1860 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1861 list_for_each_entry(sdata, &local->interfaces, list) {
1862 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1863 continue;
20f544ee
JB		 1864 if (!sdata->u.mgd.associated)
1865 continue;
6e1b1b24
EP		 1866
1867 ieee80211_send_nullfunc(local, sdata, 0);
1868 }
1869 }
1870
2e8d397e
AN		 1871 /* APs are now beaconing, add back stations */
1872 mutex_lock(&local->sta_mtx);
1873 list_for_each_entry(sta, &local->sta_list, list) {
1874 enum ieee80211_sta_state state;
1875
1876 if (!sta->uploaded)
1877 continue;
1878
1879 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1880 continue;
1881
1882 for (state = IEEE80211_STA_NOTEXIST;
1883 state < sta->sta_state; state++)
1884 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1885 state + 1));
1886 }
1887 mutex_unlock(&local->sta_mtx);
1888
7b21aea0
ES		 1889 /* add back keys */
1890 list_for_each_entry(sdata, &local->interfaces, list)
1891 if (ieee80211_sdata_running(sdata))
1892 ieee80211_enable_keys(sdata);
1893
c6209488 1894 wake_up:
04800ada
AN		 1895 local->in_reconfig = false;
1896 barrier();
1897
3c3e21e7
JB		 1898 if (local->monitors == local->open_count && local->monitors > 0)
1899 ieee80211_add_virtual_monitor(local);
1900
2a419056
JB		 1901 /*
1902 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1903 * sessions can be established after a resume.
1904 *
1905 * Also tear down aggregation sessions since reconfiguring
1906 * them in a hardware restart scenario is not easily done
1907 * right now, and the hardware will have lost information
1908 * about the sessions, but we and the AP still think they
1909 * are active. This is really a workaround though.
1910 */
74e2bd1f 1911 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 1912 mutex_lock(&local->sta_mtx);
1913
1914 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 1915 ieee80211_sta_tear_down_BA_sessions(
1916 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 1917 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 1918 }
2a419056
JB		 1919
1920 mutex_unlock(&local->sta_mtx);
74e2bd1f 1921 }
74e2bd1f 1922
445ea4e8 1923 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1924 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1925 false);
f2753ddb 1926
32769814
AN		 1927 /*
1928 * Reconfigure sched scan if it was interrupted by FW restart or
1929 * suspend.
1930 */
1931 mutex_lock(&local->mtx);
1932 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1933 lockdep_is_held(&local->mtx));
1934 if (sched_scan_sdata && local->sched_scan_req)
1935 /*
1936 * Sched scan stopped, but we don't want to report it. Instead,
1937 * we're trying to reschedule.
1938 */
1939 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1940 local->sched_scan_req))
1941 sched_scan_stopped = true;
1942 mutex_unlock(&local->mtx);
1943
1944 if (sched_scan_stopped)
e669ba2d 1945 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 1946
5bb644a0
JB		 1947 /*
1948 * If this is for hw restart things are still running.
1949 * We may want to change that later, however.
1950 */
8f21b0ad 1951 if (!local->suspended || reconfig_due_to_wowlan)
9214ad7f 1952 drv_restart_complete(local);
8f21b0ad
JB		 1953
1954 if (!local->suspended)
5bb644a0
JB		 1955 return 0;
1956
1957#ifdef CONFIG_PM
ceb99fe0 1958 /* first set suspended false, then resuming */
5bb644a0 1959 local->suspended = false;
ceb99fe0
JB		 1960 mb();
1961 local->resuming = false;
5bb644a0 1962
b8360ab8
JB		 1963 list_for_each_entry(sdata, &local->interfaces, list) {
1964 if (!ieee80211_sdata_running(sdata))
1965 continue;
1966 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1967 ieee80211_sta_restart(sdata);
1968 }
1969
26d59535 1970 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 1971#else
1972 WARN_ON(1);
1973#endif
d43c6b6e 1974
f2753ddb
JB		 1975 return 0;
1976}
42935eca 1977
95acac61
JB		 1978void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1979{
1980 struct ieee80211_sub_if_data *sdata;
1981 struct ieee80211_local *local;
1982 struct ieee80211_key *key;
1983
1984 if (WARN_ON(!vif))
1985 return;
1986
1987 sdata = vif_to_sdata(vif);
1988 local = sdata->local;
1989
1990 if (WARN_ON(!local->resuming))
1991 return;
1992
1993 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1994 return;
1995
1996 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1997
1998 mutex_lock(&local->key_mtx);
1999 list_for_each_entry(key, &sdata->key_list, list)
2000 key->flags |= KEY_FLAG_TAINTED;
2001 mutex_unlock(&local->key_mtx);
2002}
2003EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2004
04ecd257 2005void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2006{
04ecd257
JB		 2007 struct ieee80211_local *local = sdata->local;
2008 struct ieee80211_chanctx_conf *chanctx_conf;
2009 struct ieee80211_chanctx *chanctx;
025e6be2 2010
04ecd257 2011 mutex_lock(&local->chanctx_mtx);
0f78231b 2012
04ecd257
JB		 2013 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2014 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2015
04ecd257 2016 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2017 goto unlock;
0f78231b 2018
04ecd257
JB		 2019 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2020 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2021 unlock:
04ecd257 2022 mutex_unlock(&local->chanctx_mtx);
0f78231b 2023}
8e664fb3 2024
21f659bf
EP		 2025void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2026{
2027 struct ieee80211_local *local = sdata->local;
2028 struct ieee80211_chanctx_conf *chanctx_conf;
2029 struct ieee80211_chanctx *chanctx;
2030
2031 mutex_lock(&local->chanctx_mtx);
2032
2033 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2034 lockdep_is_held(&local->chanctx_mtx));
2035
2036 if (WARN_ON_ONCE(!chanctx_conf))
2037 goto unlock;
2038
2039 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2040 ieee80211_recalc_chanctx_min_def(local, chanctx);
2041 unlock:
2042 mutex_unlock(&local->chanctx_mtx);
2043}
2044
8e664fb3
JB		 2045static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2046{
2047 int i;
2048
2049 for (i = 0; i < n_ids; i++)
2050 if (ids[i] == id)
2051 return true;
2052 return false;
2053}
2054
8e664fb3
JB		 2055size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2056 const u8 *ids, int n_ids, size_t offset)
2057{
2058 size_t pos = offset;
2059
2060 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
2061 pos += 2 + ies[pos + 1];
2062
2063 return pos;
2064}
a7f3a768 2065EXPORT_SYMBOL(ieee80211_ie_split);
8e664fb3
JB		 2066
2067size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2068{
2069 size_t pos = offset;
2070
2071 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2072 pos += 2 + ies[pos + 1];
2073
2074 return pos;
2075}
615f7b9b
MV		 2076
2077static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2078 int rssi_min_thold,
2079 int rssi_max_thold)
2080{
2081 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2082
2083 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2084 return;
2085
2086 /*
2087 * Scale up threshold values before storing it, as the RSSI averaging
2088 * algorithm uses a scaled up value as well. Change this scaling
2089 * factor if the RSSI averaging algorithm changes.
2090 */
2091 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2092 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2093}
2094
2095void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2096 int rssi_min_thold,
2097 int rssi_max_thold)
2098{
2099 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2100
2101 WARN_ON(rssi_min_thold == rssi_max_thold ||
2102 rssi_min_thold > rssi_max_thold);
2103
2104 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2105 rssi_max_thold);
2106}
2107EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2108
2109void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2110{
2111 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2112
2113 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2114}
2115EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2116
ef96a842 2117u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2118 u16 cap)
2119{
2120 __le16 tmp;
2121
2122 *pos++ = WLAN_EID_HT_CAPABILITY;
2123 *pos++ = sizeof(struct ieee80211_ht_cap);
2124 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2125
2126 /* capability flags */
2127 tmp = cpu_to_le16(cap);
2128 memcpy(pos, &tmp, sizeof(u16));
2129 pos += sizeof(u16);
2130
2131 /* AMPDU parameters */
ef96a842
BG		 2132 *pos++ = ht_cap->ampdu_factor |
2133 (ht_cap->ampdu_density <<
42e7aa77
AS		 2134 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2135
2136 /* MCS set */
ef96a842
BG		 2137 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2138 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2139
2140 /* extended capabilities */
2141 pos += sizeof(__le16);
2142
2143 /* BF capabilities */
2144 pos += sizeof(__le32);
2145
2146 /* antenna selection */
2147 pos += sizeof(u8);
2148
2149 return pos;
2150}
2151
ba0afa2f 2152u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2153 u32 cap)
ba0afa2f
MP		 2154{
2155 __le32 tmp;
2156
2157 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2158 *pos++ = sizeof(struct ieee80211_vht_cap);
2159 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2160
2161 /* capability flags */
2162 tmp = cpu_to_le32(cap);
2163 memcpy(pos, &tmp, sizeof(u32));
2164 pos += sizeof(u32);
2165
2166 /* VHT MCS set */
2167 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2168 pos += sizeof(vht_cap->vht_mcs);
2169
2170 return pos;
2171}
2172
074d46d1 2173u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2174 const struct cfg80211_chan_def *chandef,
431e3154 2175 u16 prot_mode)
42e7aa77 2176{
074d46d1 2177 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2178 /* Build HT Information */
074d46d1
JB		 2179 *pos++ = WLAN_EID_HT_OPERATION;
2180 *pos++ = sizeof(struct ieee80211_ht_operation);
2181 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2182 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2183 chandef->chan->center_freq);
2184 switch (chandef->width) {
2185 case NL80211_CHAN_WIDTH_160:
2186 case NL80211_CHAN_WIDTH_80P80:
2187 case NL80211_CHAN_WIDTH_80:
2188 case NL80211_CHAN_WIDTH_40:
2189 if (chandef->center_freq1 > chandef->chan->center_freq)
2190 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2191 else
2192 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2193 break;
42e7aa77 2194 default:
074d46d1 2195 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2196 break;
2197 }
aee286c2 2198 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2199 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2200 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2201 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2202
431e3154 2203 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2204 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2205
2206 /* It seems that Basic MCS set and Supported MCS set
2207 are identical for the first 10 bytes */
074d46d1
JB		 2208 memset(&ht_oper->basic_set, 0, 16);
2209 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2210
074d46d1 2211 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2212}
2213
4bf88530 2214void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2215 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2216 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2217{
2218 enum nl80211_channel_type channel_type;
2219
4bf88530
JB		 2220 if (!ht_oper) {
2221 cfg80211_chandef_create(chandef, control_chan,
2222 NL80211_CHAN_NO_HT);
2223 return;
2224 }
42e7aa77 2225
074d46d1 2226 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2227 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2228 channel_type = NL80211_CHAN_HT20;
2229 break;
2230 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2231 channel_type = NL80211_CHAN_HT40PLUS;
2232 break;
2233 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2234 channel_type = NL80211_CHAN_HT40MINUS;
2235 break;
2236 default:
2237 channel_type = NL80211_CHAN_NO_HT;
2238 }
2239
4bf88530 2240 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2241}
2242
2103dec1
SW		 2243int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2244 const struct ieee80211_supported_band *sband,
2245 const u8 *srates, int srates_len, u32 *rates)
2246{
2247 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2248 int shift = ieee80211_chandef_get_shift(chandef);
2249 struct ieee80211_rate *br;
2250 int brate, rate, i, j, count = 0;
2251
2252 *rates = 0;
2253
2254 for (i = 0; i < srates_len; i++) {
2255 rate = srates[i] & 0x7f;
2256
2257 for (j = 0; j < sband->n_bitrates; j++) {
2258 br = &sband->bitrates[j];
2259 if ((rate_flags & br->flags) != rate_flags)
2260 continue;
2261
2262 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2263 if (brate == rate) {
2264 *rates |= BIT(j);
2265 count++;
2266 break;
2267 }
2268 }
2269 }
2270 return count;
2271}
2272
fc8a7321 2273int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2274 struct sk_buff *skb, bool need_basic,
2275 enum ieee80211_band band)
768db343 2276{
768db343
AN		 2277 struct ieee80211_local *local = sdata->local;
2278 struct ieee80211_supported_band *sband;
2103dec1 2279 int rate, shift;
768db343 2280 u8 i, rates, *pos;
fc8a7321 2281 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2282 u32 rate_flags;
768db343 2283
2103dec1
SW		 2284 shift = ieee80211_vif_get_shift(&sdata->vif);
2285 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2286 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2287 rates = 0;
2288 for (i = 0; i < sband->n_bitrates; i++) {
2289 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2290 continue;
2291 rates++;
2292 }
768db343
AN		 2293 if (rates > 8)
2294 rates = 8;
2295
2296 if (skb_tailroom(skb) < rates + 2)
2297 return -ENOMEM;
2298
2299 pos = skb_put(skb, rates + 2);
2300 *pos++ = WLAN_EID_SUPP_RATES;
2301 *pos++ = rates;
2302 for (i = 0; i < rates; i++) {
657c3e0c 2303 u8 basic = 0;
2103dec1
SW		 2304 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2305 continue;
2306
657c3e0c
AN		 2307 if (need_basic && basic_rates & BIT(i))
2308 basic = 0x80;
768db343 2309 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2310 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2311 5 * (1 << shift));
2312 *pos++ = basic | (u8) rate;
768db343
AN		 2313 }
2314
2315 return 0;
2316}
2317
fc8a7321 2318int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2319 struct sk_buff *skb, bool need_basic,
2320 enum ieee80211_band band)
768db343 2321{
768db343
AN		 2322 struct ieee80211_local *local = sdata->local;
2323 struct ieee80211_supported_band *sband;
cc63ec76 2324 int rate, shift;
768db343 2325 u8 i, exrates, *pos;
fc8a7321 2326 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2327 u32 rate_flags;
2328
2329 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2330 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2331
6b77863b 2332 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2333 exrates = 0;
2334 for (i = 0; i < sband->n_bitrates; i++) {
2335 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2336 continue;
2337 exrates++;
2338 }
2339
768db343
AN		 2340 if (exrates > 8)
2341 exrates -= 8;
2342 else
2343 exrates = 0;
2344
2345 if (skb_tailroom(skb) < exrates + 2)
2346 return -ENOMEM;
2347
2348 if (exrates) {
2349 pos = skb_put(skb, exrates + 2);
2350 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2351 *pos++ = exrates;
2352 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2353 u8 basic = 0;
2103dec1
SW		 2354 if ((rate_flags & sband->bitrates[i].flags)
2355 != rate_flags)
2356 continue;
657c3e0c
AN		 2357 if (need_basic && basic_rates & BIT(i))
2358 basic = 0x80;
2103dec1
SW		 2359 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2360 5 * (1 << shift));
2361 *pos++ = basic | (u8) rate;
768db343
AN		 2362 }
2363 }
2364 return 0;
2365}
1dae27f8
WYG		 2366
2367int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2368{
2369 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2370 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2371
be6bcabc
WYG		 2372 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2373 /* non-managed type inferfaces */
2374 return 0;
2375 }
3a7bba64 2376 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2377}
0d8a0a17 2378EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2379
2380u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2381{
2382 if (!mcs)
2383 return 1;
2384
2385 /* TODO: consider rx_highest */
2386
2387 if (mcs->rx_mask[3])
2388 return 4;
2389 if (mcs->rx_mask[2])
2390 return 3;
2391 if (mcs->rx_mask[1])
2392 return 2;
2393 return 1;
2394}
f4bda337
TP		 2395
2396/**
2397 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2398 * @local: mac80211 hw info struct
2399 * @status: RX status
2400 * @mpdu_len: total MPDU length (including FCS)
2401 * @mpdu_offset: offset into MPDU to calculate timestamp at
2402 *
2403 * This function calculates the RX timestamp at the given MPDU offset, taking
2404 * into account what the RX timestamp was. An offset of 0 will just normalize
2405 * the timestamp to TSF at beginning of MPDU reception.
2406 */
2407u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2408 struct ieee80211_rx_status *status,
2409 unsigned int mpdu_len,
2410 unsigned int mpdu_offset)
2411{
2412 u64 ts = status->mactime;
2413 struct rate_info ri;
2414 u16 rate;
2415
2416 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2417 return 0;
2418
2419 memset(&ri, 0, sizeof(ri));
2420
2421 /* Fill cfg80211 rate info */
2422 if (status->flag & RX_FLAG_HT) {
2423 ri.mcs = status->rate_idx;
2424 ri.flags |= RATE_INFO_FLAGS_MCS;
2425 if (status->flag & RX_FLAG_40MHZ)
2426 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2427 if (status->flag & RX_FLAG_SHORT_GI)
2428 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2429 } else if (status->flag & RX_FLAG_VHT) {
2430 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2431 ri.mcs = status->rate_idx;
2432 ri.nss = status->vht_nss;
2433 if (status->flag & RX_FLAG_40MHZ)
2434 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
1b8d242a 2435 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
5614618e 2436 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
1b8d242a 2437 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
5614618e 2438 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
1b8d242a 2439 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
5614618e
JB		 2440 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2441 if (status->flag & RX_FLAG_SHORT_GI)
2442 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2443 } else {
2444 struct ieee80211_supported_band *sband;
2103dec1
SW		 2445 int shift = 0;
2446 int bitrate;
2447
2448 if (status->flag & RX_FLAG_10MHZ)
2449 shift = 1;
2450 if (status->flag & RX_FLAG_5MHZ)
2451 shift = 2;
f4bda337
TP		 2452
2453 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2454 bitrate = sband->bitrates[status->rate_idx].bitrate;
2455 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2456 }
2457
2458 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2459 if (WARN_ONCE(!rate,
2460 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2461 status->flag, status->rate_idx, status->vht_nss))
2462 return 0;
f4bda337
TP		 2463
2464 /* rewind from end of MPDU */
2465 if (status->flag & RX_FLAG_MACTIME_END)
2466 ts -= mpdu_len * 8 * 10 / rate;
2467
2468 ts += mpdu_offset * 8 * 10 / rate;
2469
2470 return ts;
2471}
164eb02d
SW		 2472
2473void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2474{
2475 struct ieee80211_sub_if_data *sdata;
d2859df5 2476 struct cfg80211_chan_def chandef;
164eb02d 2477
34a3740d 2478 mutex_lock(&local->mtx);
164eb02d
SW		 2479 mutex_lock(&local->iflist_mtx);
2480 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2481 /* it might be waiting for the local->mtx, but then
2482 * by the time it gets it, sdata->wdev.cac_started
2483 * will no longer be true
2484 */
2485 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2486
2487 if (sdata->wdev.cac_started) {
d2859df5 2488 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2489 ieee80211_vif_release_channel(sdata);
2490 cfg80211_cac_event(sdata->dev,
d2859df5 2491 &chandef,
164eb02d
SW		 2492 NL80211_RADAR_CAC_ABORTED,
2493 GFP_KERNEL);
2494 }
2495 }
2496 mutex_unlock(&local->iflist_mtx);
34a3740d 2497 mutex_unlock(&local->mtx);
164eb02d
SW		 2498}
2499
2500void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2501{
2502 struct ieee80211_local *local =
2503 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2504 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2505 struct ieee80211_chanctx *ctx;
2506 int num_chanctx = 0;
2507
2508 mutex_lock(&local->chanctx_mtx);
2509 list_for_each_entry(ctx, &local->chanctx_list, list) {
2510 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2511 continue;
2512
2513 num_chanctx++;
2514 chandef = ctx->conf.def;
2515 }
2516 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2517
2518 ieee80211_dfs_cac_cancel(local);
2519
486cf4c0
MK		 2520 if (num_chanctx > 1)
2521 /* XXX: multi-channel is not supported yet */
164eb02d 2522 WARN_ON(1);
84a3d1c9 2523 else
164eb02d 2524 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2525}
2526
2527void ieee80211_radar_detected(struct ieee80211_hw *hw)
2528{
2529 struct ieee80211_local *local = hw_to_local(hw);
2530
2531 trace_api_radar_detected(local);
2532
2533 ieee80211_queue_work(hw, &local->radar_detected_work);
2534}
2535EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2536
2537u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2538{
2539 u32 ret;
2540 int tmp;
2541
2542 switch (c->width) {
2543 case NL80211_CHAN_WIDTH_20:
2544 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2545 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2546 break;
2547 case NL80211_CHAN_WIDTH_40:
2548 c->width = NL80211_CHAN_WIDTH_20;
2549 c->center_freq1 = c->chan->center_freq;
2550 ret = IEEE80211_STA_DISABLE_40MHZ |
2551 IEEE80211_STA_DISABLE_VHT;
2552 break;
2553 case NL80211_CHAN_WIDTH_80:
2554 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2555 /* n_P40 */
2556 tmp /= 2;
2557 /* freq_P40 */
2558 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2559 c->width = NL80211_CHAN_WIDTH_40;
2560 ret = IEEE80211_STA_DISABLE_VHT;
2561 break;
2562 case NL80211_CHAN_WIDTH_80P80:
2563 c->center_freq2 = 0;
2564 c->width = NL80211_CHAN_WIDTH_80;
2565 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2566 IEEE80211_STA_DISABLE_160MHZ;
2567 break;
2568 case NL80211_CHAN_WIDTH_160:
2569 /* n_P20 */
2570 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2571 /* n_P80 */
2572 tmp /= 4;
2573 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2574 c->width = NL80211_CHAN_WIDTH_80;
2575 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2576 IEEE80211_STA_DISABLE_160MHZ;
2577 break;
2578 default:
2579 case NL80211_CHAN_WIDTH_20_NOHT:
2580 WARN_ON_ONCE(1);
2581 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2582 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2583 break;
2584 case NL80211_CHAN_WIDTH_5:
2585 case NL80211_CHAN_WIDTH_10:
2586 WARN_ON_ONCE(1);
2587 /* keep c->width */
2588 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2589 break;
2590 }
2591
2592 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2593
2594 return ret;
2595}
687da132
EG		 2596
2597/*
2598 * Returns true if smps_mode_new is strictly more restrictive than
2599 * smps_mode_old.
2600 */
2601bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2602 enum ieee80211_smps_mode smps_mode_new)
2603{
2604 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2605 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2606 return false;
2607
2608 switch (smps_mode_old) {
2609 case IEEE80211_SMPS_STATIC:
2610 return false;
2611 case IEEE80211_SMPS_DYNAMIC:
2612 return smps_mode_new == IEEE80211_SMPS_STATIC;
2613 case IEEE80211_SMPS_OFF:
2614 return smps_mode_new != IEEE80211_SMPS_OFF;
2615 default:
2616 WARN_ON(1);
2617 }
2618
2619 return false;
2620}
c6da674a
CYY		 2621
2622int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2623 struct cfg80211_csa_settings *csa_settings)
2624{
2625 struct sk_buff *skb;
2626 struct ieee80211_mgmt *mgmt;
2627 struct ieee80211_local *local = sdata->local;
2628 int freq;
2629 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2630 sizeof(mgmt->u.action.u.chan_switch);
2631 u8 *pos;
2632
2633 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2634 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2635 return -EOPNOTSUPP;
2636
2637 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2638 5 + /* channel switch announcement element */
2639 3 + /* secondary channel offset element */
2640 8); /* mesh channel switch parameters element */
2641 if (!skb)
2642 return -ENOMEM;
2643
2644 skb_reserve(skb, local->tx_headroom);
2645 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2646 memset(mgmt, 0, hdr_len);
2647 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2648 IEEE80211_STYPE_ACTION);
2649
2650 eth_broadcast_addr(mgmt->da);
2651 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2652 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2653 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2654 } else {
2655 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2656 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2657 }
2658 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2659 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2660 pos = skb_put(skb, 5);
2661 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2662 *pos++ = 3; /* IE length */
2663 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2664 freq = csa_settings->chandef.chan->center_freq;
2665 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2666 *pos++ = csa_settings->count; /* count */
2667
2668 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2669 enum nl80211_channel_type ch_type;
2670
2671 skb_put(skb, 3);
2672 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2673 *pos++ = 1; /* IE length */
2674 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2675 if (ch_type == NL80211_CHAN_HT40PLUS)
2676 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2677 else
2678 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2679 }
2680
2681 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2682 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2683
2684 skb_put(skb, 8);
2685 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2686 *pos++ = 6; /* IE length */
2687 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2688 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2689 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2690 *pos++ |= csa_settings->block_tx ?
2691 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2692 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2693 pos += 2;
ca91dc97 2694 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2695 pos += 2;
c6da674a
CYY		 2696 }
2697
2698 ieee80211_tx_skb(sdata, skb);
2699 return 0;
2700}
2475b1cc
MS		 2701
2702bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2703{
2704 return !(cs == NULL || cs->cipher == 0 ||
2705 cs->hdr_len < cs->pn_len + cs->pn_off ||
2706 cs->hdr_len <= cs->key_idx_off ||
2707 cs->key_idx_shift > 7 ||
2708 cs->key_idx_mask == 0);
2709}
2710
2711bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2712{
2713 int i;
2714
2715 /* Ensure we have enough iftype bitmap space for all iftype values */
2716 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2717
2718 for (i = 0; i < n; i++)
2719 if (!ieee80211_cs_valid(&cs[i]))
2720 return false;
2721
2722 return true;
2723}
2724
2725const struct ieee80211_cipher_scheme *
2726ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2727 enum nl80211_iftype iftype)
2728{
2729 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2730 int n = local->hw.n_cipher_schemes;
2731 int i;
2732 const struct ieee80211_cipher_scheme *cs = NULL;
2733
2734 for (i = 0; i < n; i++) {
2735 if (l[i].cipher == cipher) {
2736 cs = &l[i];
2737 break;
2738 }
2739 }
2740
2741 if (!cs || !(cs->iftype & BIT(iftype)))
2742 return NULL;
2743
2744 return cs;
2745}
2746
2747int ieee80211_cs_headroom(struct ieee80211_local *local,
2748 struct cfg80211_crypto_settings *crypto,
2749 enum nl80211_iftype iftype)
2750{
2751 const struct ieee80211_cipher_scheme *cs;
2752 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2753 int i;
2754
2755 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2756 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2757 iftype);
2758
2759 if (cs && headroom < cs->hdr_len)
2760 headroom = cs->hdr_len;
2761 }
2762
2763 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2764 if (cs && headroom < cs->hdr_len)
2765 headroom = cs->hdr_len;
2766
2767 return headroom;
2768}
a7022e65
FF		 2769
2770static bool
2771ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2772{
2773 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2774 int skip;
2775
2776 if (end > 0)
2777 return false;
2778
2779 /* End time is in the past, check for repetitions */
2780 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2781 if (data->count[i] < 255) {
2782 if (data->count[i] <= skip) {
2783 data->count[i] = 0;
2784 return false;
2785 }
2786
2787 data->count[i] -= skip;
2788 }
2789
2790 data->desc[i].start += skip * data->desc[i].interval;
2791
2792 return true;
2793}
2794
2795static bool
2796ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2797 s32 *offset)
2798{
2799 bool ret = false;
2800 int i;
2801
2802 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2803 s32 cur;
2804
2805 if (!data->count[i])
2806 continue;
2807
2808 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2809 ret = true;
2810
2811 cur = data->desc[i].start - tsf;
2812 if (cur > *offset)
2813 continue;
2814
2815 cur = data->desc[i].start + data->desc[i].duration - tsf;
2816 if (cur > *offset)
2817 *offset = cur;
2818 }
2819
2820 return ret;
2821}
2822
2823static u32
2824ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2825{
2826 s32 offset = 0;
2827 int tries = 0;
2828 /*
2829 * arbitrary limit, used to avoid infinite loops when combined NoA
2830 * descriptors cover the full time period.
2831 */
2832 int max_tries = 5;
2833
2834 ieee80211_extend_absent_time(data, tsf, &offset);
2835 do {
2836 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2837 break;
2838
2839 tries++;
2840 } while (tries < max_tries);
2841
2842 return offset;
2843}
2844
2845void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2846{
2847 u32 next_offset = BIT(31) - 1;
2848 int i;
2849
2850 data->absent = 0;
2851 data->has_next_tsf = false;
2852 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2853 s32 start;
2854
2855 if (!data->count[i])
2856 continue;
2857
2858 ieee80211_extend_noa_desc(data, tsf, i);
2859 start = data->desc[i].start - tsf;
2860 if (start <= 0)
2861 data->absent |= BIT(i);
2862
2863 if (next_offset > start)
2864 next_offset = start;
2865
2866 data->has_next_tsf = true;
2867 }
2868
2869 if (data->absent)
2870 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2871
2872 data->next_tsf = tsf + next_offset;
2873}
2874EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2875
2876int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2877 struct ieee80211_noa_data *data, u32 tsf)
2878{
2879 int ret = 0;
2880 int i;
2881
2882 memset(data, 0, sizeof(*data));
2883
2884 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2885 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2886
2887 if (!desc->count || !desc->duration)
2888 continue;
2889
2890 data->count[i] = desc->count;
2891 data->desc[i].start = le32_to_cpu(desc->start_time);
2892 data->desc[i].duration = le32_to_cpu(desc->duration);
2893 data->desc[i].interval = le32_to_cpu(desc->interval);
2894
2895 if (data->count[i] > 1 &&
2896 data->desc[i].interval < data->desc[i].duration)
2897 continue;
2898
2899 ieee80211_extend_noa_desc(data, tsf, i);
2900 ret++;
2901 }
2902
2903 if (ret)
2904 ieee80211_update_p2p_noa(data, tsf);
2905
2906 return ret;
2907}
2908EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 2909
2910void ieee80211_recalc_dtim(struct ieee80211_local *local,
2911 struct ieee80211_sub_if_data *sdata)
2912{
2913 u64 tsf = drv_get_tsf(local, sdata);
2914 u64 dtim_count = 0;
2915 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2916 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2917 struct ps_data *ps;
2918 u8 bcns_from_dtim;
2919
2920 if (tsf == -1ULL || !beacon_int || !dtim_period)
2921 return;
2922
2923 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2924 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2925 if (!sdata->bss)
2926 return;
2927
2928 ps = &sdata->bss->ps;
2929 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2930 ps = &sdata->u.mesh.ps;
2931 } else {
2932 return;
2933 }
2934
2935 /*
2936 * actually finds last dtim_count, mac80211 will update in
2937 * __beacon_add_tim().
2938 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2939 */
2940 do_div(tsf, beacon_int);
2941 bcns_from_dtim = do_div(tsf, dtim_period);
2942 /* just had a DTIM */
2943 if (!bcns_from_dtim)
2944 dtim_count = 0;
2945 else
2946 dtim_count = dtim_period - bcns_from_dtim;
2947
2948 ps->dtim_count = dtim_count;
2949}
73de86a3 2950
71e6195e
MK		 2951static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
2952 struct ieee80211_chanctx *ctx)
2953{
2954 struct ieee80211_sub_if_data *sdata;
2955 u8 radar_detect = 0;
2956
2957 lockdep_assert_held(&local->chanctx_mtx);
2958
2959 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
2960 return 0;
2961
2962 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
2963 if (sdata->reserved_radar_required)
2964 radar_detect |= BIT(sdata->reserved_chandef.width);
2965
2966 /*
2967 * An in-place reservation context should not have any assigned vifs
2968 * until it replaces the other context.
2969 */
2970 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
2971 !list_empty(&ctx->assigned_vifs));
2972
2973 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
2974 if (sdata->radar_required)
2975 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
2976
2977 return radar_detect;
2978}
2979
73de86a3
LC		 2980int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2981 const struct cfg80211_chan_def *chandef,
2982 enum ieee80211_chanctx_mode chanmode,
2983 u8 radar_detect)
2984{
2985 struct ieee80211_local *local = sdata->local;
2986 struct ieee80211_sub_if_data *sdata_iter;
2987 enum nl80211_iftype iftype = sdata->wdev.iftype;
2988 int num[NUM_NL80211_IFTYPES];
2989 struct ieee80211_chanctx *ctx;
b6a55015 2990 int num_different_channels = 0;
73de86a3
LC		 2991 int total = 1;
2992
2993 lockdep_assert_held(&local->chanctx_mtx);
2994
2995 if (WARN_ON(hweight32(radar_detect) > 1))
2996 return -EINVAL;
2997
b6a55015
LC		 2998 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
2999 !chandef->chan))
73de86a3
LC		 3000 return -EINVAL;
3001
b6a55015
LC		 3002 if (chandef)
3003 num_different_channels = 1;
3004
73de86a3
LC		 3005 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3006 return -EINVAL;
3007
3008 /* Always allow software iftypes */
3009 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3010 if (radar_detect)
3011 return -EINVAL;
3012 return 0;
3013 }
3014
3015 memset(num, 0, sizeof(num));
3016
3017 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3018 num[iftype] = 1;
3019
3020 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3021 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3022 continue;
71e6195e 3023 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3024 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3025 num_different_channels++;
3026 continue;
3027 }
b6a55015 3028 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3029 cfg80211_chandef_compatible(chandef,
3030 &ctx->conf.def))
3031 continue;
3032 num_different_channels++;
3033 }
3034
3035 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3036 struct wireless_dev *wdev_iter;
3037
3038 wdev_iter = &sdata_iter->wdev;
3039
3040 if (sdata_iter == sdata ||
3041 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3042 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3043 continue;
3044
3045 num[wdev_iter->iftype]++;
3046 total++;
3047 }
3048
3049 if (total == 1 && !radar_detect)
3050 return 0;
3051
3052 return cfg80211_check_combinations(local->hw.wiphy,
3053 num_different_channels,
3054 radar_detect, num);
3055}
6fa001bc
MK		 3056
3057static void
3058ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3059 void *data)
3060{
3061 u32 *max_num_different_channels = data;
3062
3063 *max_num_different_channels = max(*max_num_different_channels,
3064 c->num_different_channels);
3065}
3066
3067int ieee80211_max_num_channels(struct ieee80211_local *local)
3068{
3069 struct ieee80211_sub_if_data *sdata;
3070 int num[NUM_NL80211_IFTYPES] = {};
3071 struct ieee80211_chanctx *ctx;
3072 int num_different_channels = 0;
3073 u8 radar_detect = 0;
3074 u32 max_num_different_channels = 1;
3075 int err;
3076
3077 lockdep_assert_held(&local->chanctx_mtx);
3078
3079 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3080 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3081 continue;
3082
6fa001bc
MK		 3083 num_different_channels++;
3084
71e6195e 3085 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3086 }
3087
3088 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3089 num[sdata->wdev.iftype]++;
3090
3091 err = cfg80211_iter_combinations(local->hw.wiphy,
3092 num_different_channels, radar_detect,
3093 num, ieee80211_iter_max_chans,
3094 &max_num_different_channels);
3095 if (err < 0)
3096 return err;
3097
3098 return max_num_different_channels;
3099}
40b861a0
AN		 3100
3101u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3102{
3103 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3104 *buf++ = 7; /* len */
3105 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3106 *buf++ = 0x50;
3107 *buf++ = 0xf2;
3108 *buf++ = 2; /* WME */
3109 *buf++ = 0; /* WME info */
3110 *buf++ = 1; /* WME ver */
3111 *buf++ = qosinfo; /* U-APSD no in use */
3112
3113 return buf;
3114}
Linux 6.x block layer and io_uring tree(s)