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cfg80211: remove 80+80 MHz rate reporting
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / util.c
CommitLineData
c2d1560a
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
d98ad83e 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
c2d1560a
JB		 7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15#include <net/mac80211.h>
16#include <linux/netdevice.h>
bc3b2d7f 17#include <linux/export.h>
c2d1560a
JB		 18#include <linux/types.h>
19#include <linux/slab.h>
20#include <linux/skbuff.h>
21#include <linux/etherdevice.h>
22#include <linux/if_arp.h>
c2d1560a 23#include <linux/bitmap.h>
dd76986b 24#include <linux/crc32.h>
881d966b 25#include <net/net_namespace.h>
c2d1560a 26#include <net/cfg80211.h>
dabeb344 27#include <net/rtnetlink.h>
c2d1560a
JB		 28
29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7 31#include "rate.h"
ee385855 32#include "mesh.h"
c2d1560a 33#include "wme.h"
f2753ddb 34#include "led.h"
fffd0934 35#include "wep.h"
c2d1560a
JB		 36
37/* privid for wiphys to determine whether they belong to us or not */
8a47cea7 38const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
c2d1560a 39
9a95371a
LR		 40struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41{
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47}
48EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
c2d1560a 49
71364716 50u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
05c914fe 51 enum nl80211_iftype type)
c2d1560a 52{
a494bb1c 53 __le16 fc = hdr->frame_control;
c2d1560a 54
98f0b0a3
RR		 55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
c2d1560a
JB		 57 return NULL;
58
a494bb1c 59 if (ieee80211_is_data(fc)) {
98f0b0a3
RR		 60 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
a494bb1c
HH		 62
63 if (ieee80211_has_a4(fc))
c2d1560a 64 return NULL;
a494bb1c
HH		 65 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
c2d1560a 68 return hdr->addr2;
a494bb1c
HH		 69
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
98f0b0a3
RR		 74 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
c2d1560a 76 return hdr->addr3;
a494bb1c
HH		 77 }
78
79 if (ieee80211_is_ctl(fc)) {
f359d3fe 80 if (ieee80211_is_pspoll(fc))
c2d1560a 81 return hdr->addr1;
a494bb1c
HH		 82
83 if (ieee80211_is_back_req(fc)) {
71364716 84 switch (type) {
05c914fe 85 case NL80211_IFTYPE_STATION:
71364716 86 return hdr->addr2;
05c914fe
JB		 87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
71364716
RR		 89 return hdr->addr1;
90 default:
a494bb1c 91 break; /* fall through to the return */
71364716
RR		 92 }
93 }
c2d1560a
JB		 94 }
95
96 return NULL;
97}
98
5cf121c3 99void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
c2d1560a 100{
252b86c4 101 struct sk_buff *skb;
2de8e0d9
JB		 102 struct ieee80211_hdr *hdr;
103
252b86c4 104 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9
JB		 105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
252b86c4 107 }
c2d1560a
JB		 108}
109
4ee73f33 110int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
438b61b7
SW		 111 int rate, int erp, int short_preamble,
112 int shift)
c2d1560a
JB		 113{
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
438b61b7
SW		 123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
c2d1560a
JB		 126 */
127
4ee73f33 128 if (band == IEEE80211_BAND_5GHZ || erp) {
c2d1560a
JB		 129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
438b61b7 138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
c2d1560a
JB		 139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
c2d1560a 142 dur = 16; /* SIFS + signal ext */
438b61b7
SW		 143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
438b61b7
SW		 145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
2103dec1
SW		 151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
c2d1560a
JB		 157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175}
176
177/* Exported duration function for driver use */
32bfd35d
JB		 178__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
4ee73f33 180 enum ieee80211_band band,
8318d78a
JB		 181 size_t frame_len,
182 struct ieee80211_rate *rate)
c2d1560a 183{
25d834e1 184 struct ieee80211_sub_if_data *sdata;
c2d1560a 185 u16 dur;
438b61b7 186 int erp, shift = 0;
25d834e1 187 bool short_preamble = false;
c2d1560a 188
8318d78a 189 erp = 0;
25d834e1
JB		 190 if (vif) {
191 sdata = vif_to_sdata(vif);
bda3933a 192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 195 shift = ieee80211_vif_get_shift(vif);
25d834e1 196 }
8318d78a 197
4ee73f33 198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
438b61b7 199 short_preamble, shift);
c2d1560a
JB		 200
201 return cpu_to_le16(dur);
202}
203EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
32bfd35d
JB		 205__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
e039fa4a 207 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 208{
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
25d834e1 211 struct ieee80211_sub_if_data *sdata;
471b3efd 212 bool short_preamble;
2103dec1 213 int erp, shift = 0, bitrate;
c2d1560a 214 u16 dur;
2e92e6f2
JB		 215 struct ieee80211_supported_band *sband;
216
4ee73f33 217 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 218
25d834e1 219 short_preamble = false;
7e9ed188 220
e039fa4a 221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a
JB		 222
223 erp = 0;
25d834e1
JB		 224 if (vif) {
225 sdata = vif_to_sdata(vif);
bda3933a 226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 229 shift = ieee80211_vif_get_shift(vif);
25d834e1 230 }
c2d1560a 231
2103dec1
SW		 232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
c2d1560a 234 /* CTS duration */
2103dec1 235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 236 erp, short_preamble, shift);
c2d1560a 237 /* Data frame duration */
2103dec1 238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 239 erp, short_preamble, shift);
c2d1560a 240 /* ACK duration */
2103dec1 241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 242 erp, short_preamble, shift);
c2d1560a
JB		 243
244 return cpu_to_le16(dur);
245}
246EXPORT_SYMBOL(ieee80211_rts_duration);
247
32bfd35d
JB		 248__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
c2d1560a 250 size_t frame_len,
e039fa4a 251 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 252{
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
25d834e1 255 struct ieee80211_sub_if_data *sdata;
471b3efd 256 bool short_preamble;
2103dec1 257 int erp, shift = 0, bitrate;
c2d1560a 258 u16 dur;
2e92e6f2
JB		 259 struct ieee80211_supported_band *sband;
260
4ee73f33 261 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 262
25d834e1 263 short_preamble = false;
7e9ed188 264
e039fa4a 265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a 266 erp = 0;
25d834e1
JB		 267 if (vif) {
268 sdata = vif_to_sdata(vif);
bda3933a 269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 272 shift = ieee80211_vif_get_shift(vif);
25d834e1 273 }
c2d1560a 274
2103dec1
SW		 275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
c2d1560a 277 /* Data frame duration */
2103dec1 278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 279 erp, short_preamble, shift);
e039fa4a 280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
c2d1560a 281 /* ACK duration */
2103dec1 282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 283 erp, short_preamble, shift);
c2d1560a
JB		 284 }
285
286 return cpu_to_le16(dur);
287}
288EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
3a25a8c8
JB		 290void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291{
292 struct ieee80211_sub_if_data *sdata;
a6f38ac3
JB		 293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
3a25a8c8
JB		 297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
f142c6b9
JB		 301 if (!sdata->dev)
302 continue;
303
3a25a8c8
JB		 304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
a6f38ac3 308 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 309 int ac_queue = sdata->vif.hw_queue[ac];
310
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318}
319
ce7c9111 320static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 321 enum queue_stop_reason reason,
322 bool refcounted)
c2d1560a
JB		 323{
324 struct ieee80211_local *local = hw_to_local(hw);
325
b5878a2d
JB		 326 trace_wake_queue(local, queue, reason);
327
e4e72fb4
JB		 328 if (WARN_ON(queue >= hw->queues))
329 return;
ce7c9111 330
ada15125
JB		 331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
cca07b00
LC		 334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
96f5e66e
JB		 341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
7236fe29
JB		 346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
3a25a8c8 348 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 349 rcu_read_unlock();
350 } else
3b8d81e0 351 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 352}
ce7c9111 353
96f5e66e 354void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 355 enum queue_stop_reason reason,
356 bool refcounted)
ce7c9111
KV		 357{
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364}
365
366void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367{
368 ieee80211_wake_queue_by_reason(hw, queue,
cca07b00
LC		 369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
ce7c9111 371}
c2d1560a
JB		 372EXPORT_SYMBOL(ieee80211_wake_queue);
373
ce7c9111 374static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 375 enum queue_stop_reason reason,
376 bool refcounted)
c2d1560a
JB		 377{
378 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 379 struct ieee80211_sub_if_data *sdata;
a6f38ac3 380 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 381
b5878a2d
JB		 382 trace_stop_queue(local, queue, reason);
383
e4e72fb4
JB		 384 if (WARN_ON(queue >= hw->queues))
385 return;
96f5e66e 386
cca07b00
LC		 387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
ada15125 391
cca07b00
LC		 392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
cf0277e7 394
a6f38ac3
JB		 395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
cf0277e7 398 rcu_read_lock();
3a25a8c8
JB		 399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
f142c6b9
JB		 402 if (!sdata->dev)
403 continue;
404
a6f38ac3 405 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
cf0277e7 411 rcu_read_unlock();
c2d1560a 412}
ce7c9111 413
96f5e66e 414void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 415 enum queue_stop_reason reason,
416 bool refcounted)
ce7c9111
KV		 417{
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424}
425
426void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427{
428 ieee80211_stop_queue_by_reason(hw, queue,
cca07b00
LC		 429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
ce7c9111 431}
c2d1560a
JB		 432EXPORT_SYMBOL(ieee80211_stop_queue);
433
8f77f384
JB		 434void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436{
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
a7bc376c 439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 440 int queue = info->hw_queue;
a7bc376c
JB		 441
442 if (WARN_ON(!info->control.vif)) {
d4fa14cd 443 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 444 return;
445 }
8f77f384
JB		 446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00
LC		 448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
3b8d81e0 450 __skb_queue_tail(&local->pending[queue], skb);
cca07b00
LC		 451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
8f77f384
JB		 453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454}
455
e3685e03
JB		 456void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
8f77f384
JB		 458{
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
b0b97a8a 462 int queue, i;
8f77f384
JB		 463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 465 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
d4fa14cd 469 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 470 continue;
471 }
472
3a25a8c8 473 queue = info->hw_queue;
4644ae89
JB		 474
475 __ieee80211_stop_queue(hw, queue,
cca07b00
LC		 476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
4644ae89 478
3b8d81e0 479 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 480 }
481
3b8d81e0 482 for (i = 0; i < hw->queues; i++)
8f77f384 483 __ieee80211_wake_queue(hw, i,
cca07b00
LC		 484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
8f77f384 486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 487}
488
ce7c9111 489void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 490 unsigned long queues,
cca07b00
LC		 491 enum queue_stop_reason reason,
492 bool refcounted)
c2d1560a 493{
ce7c9111
KV		 494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
c2d1560a
JB		 496 int i;
497
ce7c9111
KV		 498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
445ea4e8 500 for_each_set_bit(i, &queues, hw->queues)
cca07b00 501 __ieee80211_stop_queue(hw, i, reason, refcounted);
ce7c9111
KV		 502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504}
505
506void ieee80211_stop_queues(struct ieee80211_hw *hw)
507{
445ea4e8 508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
c2d1560a
JB		 511}
512EXPORT_SYMBOL(ieee80211_stop_queues);
513
92ab8535
TW		 514int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515{
516 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 517 unsigned long flags;
518 int ret;
96f5e66e 519
e4e72fb4
JB		 520 if (WARN_ON(queue >= hw->queues))
521 return true;
96f5e66e 522
3b8d81e0 523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
92ab8535
TW		 528}
529EXPORT_SYMBOL(ieee80211_queue_stopped);
530
ce7c9111 531void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 532 unsigned long queues,
cca07b00
LC		 533 enum queue_stop_reason reason,
534 bool refcounted)
c2d1560a 535{
ce7c9111
KV		 536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
c2d1560a
JB		 538 int i;
539
ce7c9111
KV		 540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
445ea4e8 542 for_each_set_bit(i, &queues, hw->queues)
cca07b00 543 __ieee80211_wake_queue(hw, i, reason, refcounted);
ce7c9111
KV		 544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546}
547
548void ieee80211_wake_queues(struct ieee80211_hw *hw)
549{
445ea4e8 550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
c2d1560a
JB		 553}
554EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 555
26da23b6
LC		 556static unsigned int
557ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
39ecc01d 559{
26da23b6 560 unsigned int queues;
39ecc01d
JB		 561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
26da23b6
LC		 576 return queues;
577}
578
4f9610d5
LK		 579void __ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
3b24f4c6 581 unsigned int queues, bool drop)
26da23b6 582{
26da23b6
LC		 583 if (!local->ops->flush)
584 return;
585
4f9610d5
LK		 586 /*
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
589 */
590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591 queues = ieee80211_get_vif_queues(local, sdata);
26da23b6 592
59f48fe2 593 ieee80211_stop_queues_by_reason(&local->hw, queues,
cca07b00
LC		 594 IEEE80211_QUEUE_STOP_REASON_FLUSH,
595 false);
445ea4e8 596
3b24f4c6 597 drv_flush(local, sdata, queues, drop);
445ea4e8 598
59f48fe2 599 ieee80211_wake_queues_by_reason(&local->hw, queues,
cca07b00
LC		 600 IEEE80211_QUEUE_STOP_REASON_FLUSH,
601 false);
39ecc01d
JB		 602}
603
4f9610d5 604void ieee80211_flush_queues(struct ieee80211_local *local,
3b24f4c6 605 struct ieee80211_sub_if_data *sdata, bool drop)
4f9610d5 606{
3b24f4c6 607 __ieee80211_flush_queues(local, sdata, 0, drop);
4f9610d5
LK		 608}
609
26da23b6
LC		 610void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611 struct ieee80211_sub_if_data *sdata,
612 enum queue_stop_reason reason)
613{
614 ieee80211_stop_queues_by_reason(&local->hw,
615 ieee80211_get_vif_queues(local, sdata),
616 reason, true);
617}
618
619void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata,
621 enum queue_stop_reason reason)
622{
623 ieee80211_wake_queues_by_reason(&local->hw,
624 ieee80211_get_vif_queues(local, sdata),
625 reason, true);
626}
627
c7c71066
JB		 628static void __iterate_active_interfaces(struct ieee80211_local *local,
629 u32 iter_flags,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
632 void *data)
dabeb344 633{
dabeb344
JB		 634 struct ieee80211_sub_if_data *sdata;
635
c7c71066 636 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 637 switch (sdata->vif.type) {
05c914fe 638 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 639 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
640 continue;
641 break;
05c914fe 642 case NL80211_IFTYPE_AP_VLAN:
2f561feb 643 continue;
2ca27bcf 644 default:
2f561feb
ID		 645 break;
646 }
8b2c9824
JB		 647 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
648 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
649 continue;
9607e6b6 650 if (ieee80211_sdata_running(sdata))
47846c9b 651 iterator(data, sdata->vif.addr,
2f561feb
ID		 652 &sdata->vif);
653 }
654
c7c71066
JB		 655 sdata = rcu_dereference_check(local->monitor_sdata,
656 lockdep_is_held(&local->iflist_mtx) ||
657 lockdep_rtnl_is_held());
8b2c9824
JB		 658 if (sdata &&
659 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
660 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 661 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 662}
685fb72b 663
c7c71066
JB		 664void ieee80211_iterate_active_interfaces(
665 struct ieee80211_hw *hw, u32 iter_flags,
666 void (*iterator)(void *data, u8 *mac,
667 struct ieee80211_vif *vif),
668 void *data)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 mutex_lock(&local->iflist_mtx);
673 __iterate_active_interfaces(local, iter_flags, iterator, data);
c771c9d8 674 mutex_unlock(&local->iflist_mtx);
2f561feb
ID		 675}
676EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
677
678void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 679 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 680 void (*iterator)(void *data, u8 *mac,
681 struct ieee80211_vif *vif),
682 void *data)
683{
684 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 685
e38bad47 686 rcu_read_lock();
c7c71066
JB		 687 __iterate_active_interfaces(local, iter_flags, iterator, data);
688 rcu_read_unlock();
689}
690EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 691
c7c71066
JB		 692void ieee80211_iterate_active_interfaces_rtnl(
693 struct ieee80211_hw *hw, u32 iter_flags,
694 void (*iterator)(void *data, u8 *mac,
695 struct ieee80211_vif *vif),
696 void *data)
697{
698 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 699
c7c71066 700 ASSERT_RTNL();
685fb72b 701
c7c71066 702 __iterate_active_interfaces(local, iter_flags, iterator, data);
dabeb344 703}
c7c71066 704EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 705
0fc1e049
AN		 706static void __iterate_stations(struct ieee80211_local *local,
707 void (*iterator)(void *data,
708 struct ieee80211_sta *sta),
709 void *data)
710{
711 struct sta_info *sta;
712
713 list_for_each_entry_rcu(sta, &local->sta_list, list) {
714 if (!sta->uploaded)
715 continue;
716
717 iterator(data, &sta->sta);
718 }
719}
720
721void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
722 void (*iterator)(void *data,
723 struct ieee80211_sta *sta),
724 void *data)
725{
726 struct ieee80211_local *local = hw_to_local(hw);
727
728 rcu_read_lock();
729 __iterate_stations(local, iterator, data);
730 rcu_read_unlock();
731}
732EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
733
ad7e718c
JB		 734struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
735{
736 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
737
738 if (!ieee80211_sdata_running(sdata) ||
739 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
740 return NULL;
741 return &sdata->vif;
742}
743EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
744
42935eca
LR		 745/*
746 * Nothing should have been stuffed into the workqueue during
747 * the suspend->resume cycle. If this WARN is seen then there
748 * is a bug with either the driver suspend or something in
749 * mac80211 stuffing into the workqueue which we haven't yet
750 * cleared during mac80211's suspend cycle.
751 */
752static bool ieee80211_can_queue_work(struct ieee80211_local *local)
753{
ceb99fe0
JB		 754 if (WARN(local->suspended && !local->resuming,
755 "queueing ieee80211 work while going to suspend\n"))
756 return false;
42935eca
LR		 757
758 return true;
759}
760
761void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
762{
763 struct ieee80211_local *local = hw_to_local(hw);
764
765 if (!ieee80211_can_queue_work(local))
766 return;
767
768 queue_work(local->workqueue, work);
769}
770EXPORT_SYMBOL(ieee80211_queue_work);
771
772void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
773 struct delayed_work *dwork,
774 unsigned long delay)
775{
776 struct ieee80211_local *local = hw_to_local(hw);
777
778 if (!ieee80211_can_queue_work(local))
779 return;
780
781 queue_delayed_work(local->workqueue, dwork, delay);
782}
783EXPORT_SYMBOL(ieee80211_queue_delayed_work);
784
35d865af 785u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 786 struct ieee802_11_elems *elems,
787 u64 filter, u32 crc)
788{
789 size_t left = len;
35d865af 790 const u8 *pos = start;
dd76986b 791 bool calc_crc = filter != 0;
fcff4f10 792 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 793 const u8 *ie;
dd76986b 794
fcff4f10 795 bitmap_zero(seen_elems, 256);
dd76986b
JB		 796 memset(elems, 0, sizeof(*elems));
797 elems->ie_start = start;
798 elems->total_len = len;
799
800 while (left >= 2) {
801 u8 id, elen;
fcff4f10 802 bool elem_parse_failed;
dd76986b
JB		 803
804 id = *pos++;
805 elen = *pos++;
806 left -= 2;
807
fcff4f10
PS		 808 if (elen > left) {
809 elems->parse_error = true;
dd76986b 810 break;
fcff4f10
PS		 811 }
812
9690fb16
JB		 813 switch (id) {
814 case WLAN_EID_SSID:
815 case WLAN_EID_SUPP_RATES:
816 case WLAN_EID_FH_PARAMS:
817 case WLAN_EID_DS_PARAMS:
818 case WLAN_EID_CF_PARAMS:
819 case WLAN_EID_TIM:
820 case WLAN_EID_IBSS_PARAMS:
821 case WLAN_EID_CHALLENGE:
822 case WLAN_EID_RSN:
823 case WLAN_EID_ERP_INFO:
824 case WLAN_EID_EXT_SUPP_RATES:
825 case WLAN_EID_HT_CAPABILITY:
826 case WLAN_EID_HT_OPERATION:
827 case WLAN_EID_VHT_CAPABILITY:
828 case WLAN_EID_VHT_OPERATION:
829 case WLAN_EID_MESH_ID:
830 case WLAN_EID_MESH_CONFIG:
831 case WLAN_EID_PEER_MGMT:
832 case WLAN_EID_PREQ:
833 case WLAN_EID_PREP:
834 case WLAN_EID_PERR:
835 case WLAN_EID_RANN:
836 case WLAN_EID_CHANNEL_SWITCH:
837 case WLAN_EID_EXT_CHANSWITCH_ANN:
838 case WLAN_EID_COUNTRY:
839 case WLAN_EID_PWR_CONSTRAINT:
840 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 841 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 842 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 843 case WLAN_EID_CHAN_SWITCH_PARAM:
9041c1fa 844 case WLAN_EID_EXT_CAPABILITY:
53837584
AN		 845 case WLAN_EID_CHAN_SWITCH_TIMING:
846 case WLAN_EID_LINK_ID:
b2e506bf
JB		 847 /*
848 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
849 * that if the content gets bigger it might be needed more than once
850 */
9690fb16
JB		 851 if (test_bit(id, seen_elems)) {
852 elems->parse_error = true;
853 left -= elen;
854 pos += elen;
855 continue;
856 }
857 break;
fcff4f10 858 }
dd76986b
JB		 859
860 if (calc_crc && id < 64 && (filter & (1ULL << id)))
861 crc = crc32_be(crc, pos - 2, elen + 2);
862
fcff4f10
PS		 863 elem_parse_failed = false;
864
dd76986b 865 switch (id) {
53837584
AN		 866 case WLAN_EID_LINK_ID:
867 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
868 elem_parse_failed = true;
869 break;
870 }
871 elems->lnk_id = (void *)(pos - 2);
872 break;
873 case WLAN_EID_CHAN_SWITCH_TIMING:
874 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
875 elem_parse_failed = true;
876 break;
877 }
878 elems->ch_sw_timing = (void *)pos;
879 break;
9041c1fa
AN		 880 case WLAN_EID_EXT_CAPABILITY:
881 elems->ext_capab = pos;
882 elems->ext_capab_len = elen;
883 break;
dd76986b
JB		 884 case WLAN_EID_SSID:
885 elems->ssid = pos;
886 elems->ssid_len = elen;
887 break;
888 case WLAN_EID_SUPP_RATES:
889 elems->supp_rates = pos;
890 elems->supp_rates_len = elen;
891 break;
dd76986b 892 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 893 if (elen >= 1)
894 elems->ds_params = pos;
895 else
896 elem_parse_failed = true;
dd76986b 897 break;
dd76986b
JB		 898 case WLAN_EID_TIM:
899 if (elen >= sizeof(struct ieee80211_tim_ie)) {
900 elems->tim = (void *)pos;
901 elems->tim_len = elen;
fcff4f10
PS		 902 } else
903 elem_parse_failed = true;
dd76986b 904 break;
dd76986b
JB		 905 case WLAN_EID_CHALLENGE:
906 elems->challenge = pos;
907 elems->challenge_len = elen;
908 break;
909 case WLAN_EID_VENDOR_SPECIFIC:
910 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
911 pos[2] == 0xf2) {
912 /* Microsoft OUI (00:50:F2) */
913
914 if (calc_crc)
915 crc = crc32_be(crc, pos - 2, elen + 2);
916
441a33ba 917 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 918 /* OUI Type 2 - WMM IE */
919 if (pos[4] == 0) {
920 elems->wmm_info = pos;
921 elems->wmm_info_len = elen;
922 } else if (pos[4] == 1) {
923 elems->wmm_param = pos;
924 elems->wmm_param_len = elen;
925 }
926 }
927 }
928 break;
929 case WLAN_EID_RSN:
930 elems->rsn = pos;
931 elems->rsn_len = elen;
932 break;
933 case WLAN_EID_ERP_INFO:
1946bed9
JB		 934 if (elen >= 1)
935 elems->erp_info = pos;
936 else
937 elem_parse_failed = true;
dd76986b
JB		 938 break;
939 case WLAN_EID_EXT_SUPP_RATES:
940 elems->ext_supp_rates = pos;
941 elems->ext_supp_rates_len = elen;
942 break;
943 case WLAN_EID_HT_CAPABILITY:
944 if (elen >= sizeof(struct ieee80211_ht_cap))
945 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 946 else
947 elem_parse_failed = true;
dd76986b 948 break;
074d46d1
JB		 949 case WLAN_EID_HT_OPERATION:
950 if (elen >= sizeof(struct ieee80211_ht_operation))
951 elems->ht_operation = (void *)pos;
fcff4f10
PS		 952 else
953 elem_parse_failed = true;
dd76986b 954 break;
818255ea
MP		 955 case WLAN_EID_VHT_CAPABILITY:
956 if (elen >= sizeof(struct ieee80211_vht_cap))
957 elems->vht_cap_elem = (void *)pos;
958 else
959 elem_parse_failed = true;
960 break;
961 case WLAN_EID_VHT_OPERATION:
962 if (elen >= sizeof(struct ieee80211_vht_operation))
963 elems->vht_operation = (void *)pos;
964 else
965 elem_parse_failed = true;
966 break;
bee7f586
JB		 967 case WLAN_EID_OPMODE_NOTIF:
968 if (elen > 0)
969 elems->opmode_notif = pos;
970 else
971 elem_parse_failed = true;
972 break;
dd76986b
JB		 973 case WLAN_EID_MESH_ID:
974 elems->mesh_id = pos;
975 elems->mesh_id_len = elen;
976 break;
977 case WLAN_EID_MESH_CONFIG:
978 if (elen >= sizeof(struct ieee80211_meshconf_ie))
979 elems->mesh_config = (void *)pos;
fcff4f10
PS		 980 else
981 elem_parse_failed = true;
dd76986b
JB		 982 break;
983 case WLAN_EID_PEER_MGMT:
984 elems->peering = pos;
985 elems->peering_len = elen;
986 break;
3f52b7e3
MP		 987 case WLAN_EID_MESH_AWAKE_WINDOW:
988 if (elen >= 2)
989 elems->awake_window = (void *)pos;
990 break;
dd76986b
JB		 991 case WLAN_EID_PREQ:
992 elems->preq = pos;
993 elems->preq_len = elen;
994 break;
995 case WLAN_EID_PREP:
996 elems->prep = pos;
997 elems->prep_len = elen;
998 break;
999 case WLAN_EID_PERR:
1000 elems->perr = pos;
1001 elems->perr_len = elen;
1002 break;
1003 case WLAN_EID_RANN:
1004 if (elen >= sizeof(struct ieee80211_rann_ie))
1005 elems->rann = (void *)pos;
fcff4f10
PS		 1006 else
1007 elem_parse_failed = true;
dd76986b
JB		 1008 break;
1009 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 1010 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1011 elem_parse_failed = true;
1012 break;
1013 }
1014 elems->ch_switch_ie = (void *)pos;
dd76986b 1015 break;
b4f286a1
JB		 1016 case WLAN_EID_EXT_CHANSWITCH_ANN:
1017 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1018 elem_parse_failed = true;
1019 break;
1020 }
1021 elems->ext_chansw_ie = (void *)pos;
1022 break;
85220d71
JB		 1023 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1024 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1025 elem_parse_failed = true;
1026 break;
1027 }
1028 elems->sec_chan_offs = (void *)pos;
1029 break;
8f2535b9
CYY		 1030 case WLAN_EID_CHAN_SWITCH_PARAM:
1031 if (elen !=
1032 sizeof(*elems->mesh_chansw_params_ie)) {
1033 elem_parse_failed = true;
1034 break;
1035 }
1036 elems->mesh_chansw_params_ie = (void *)pos;
1037 break;
b2e506bf
JB		 1038 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1039 if (!action ||
1040 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1041 elem_parse_failed = true;
1042 break;
1043 }
1044 elems->wide_bw_chansw_ie = (void *)pos;
1045 break;
1046 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1047 if (action) {
1048 elem_parse_failed = true;
1049 break;
1050 }
1051 /*
1052 * This is a bit tricky, but as we only care about
1053 * the wide bandwidth channel switch element, so
1054 * just parse it out manually.
1055 */
1056 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1057 pos, elen);
1058 if (ie) {
1059 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1060 elems->wide_bw_chansw_ie =
1061 (void *)(ie + 2);
1062 else
1063 elem_parse_failed = true;
1064 }
1065 break;
dd76986b
JB		 1066 case WLAN_EID_COUNTRY:
1067 elems->country_elem = pos;
1068 elems->country_elem_len = elen;
1069 break;
1070 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1071 if (elen != 1) {
1072 elem_parse_failed = true;
1073 break;
1074 }
dd76986b 1075 elems->pwr_constr_elem = pos;
dd76986b 1076 break;
c8d65917
SG		 1077 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1078 /* Lots of different options exist, but we only care
1079 * about the Dynamic Transmit Power Control element.
1080 * First check for the Cisco OUI, then for the DTPC
1081 * tag (0x00).
1082 */
1083 if (elen < 4) {
1084 elem_parse_failed = true;
1085 break;
1086 }
1087
1088 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1089 pos[2] != 0x96 || pos[3] != 0x00)
1090 break;
1091
1092 if (elen != 6) {
1093 elem_parse_failed = true;
1094 break;
1095 }
1096
1097 if (calc_crc)
1098 crc = crc32_be(crc, pos - 2, elen + 2);
1099
1100 elems->cisco_dtpc_elem = pos;
1101 break;
dd76986b 1102 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1103 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1104 elems->timeout_int = (void *)pos;
1105 else
1106 elem_parse_failed = true;
dd76986b
JB		 1107 break;
1108 default:
1109 break;
1110 }
1111
fcff4f10
PS		 1112 if (elem_parse_failed)
1113 elems->parse_error = true;
1114 else
5df45690 1115 __set_bit(id, seen_elems);
fcff4f10 1116
dd76986b
JB		 1117 left -= elen;
1118 pos += elen;
1119 }
1120
fcff4f10
PS		 1121 if (left != 0)
1122 elems->parse_error = true;
1123
dd76986b
JB		 1124 return crc;
1125}
1126
3abead59
JB		 1127void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1128 bool bss_notify)
5825fe10
JB		 1129{
1130 struct ieee80211_local *local = sdata->local;
1131 struct ieee80211_tx_queue_params qparam;
55de908a 1132 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1133 int ac;
a8ce8544 1134 bool use_11b, enable_qos;
239281f8 1135 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
aa837e1d 1136 int aCWmin, aCWmax;
5825fe10
JB		 1137
1138 if (!local->ops->conf_tx)
1139 return;
1140
54bcbc69
JB		 1141 if (local->hw.queues < IEEE80211_NUM_ACS)
1142 return;
1143
5825fe10
JB		 1144 memset(&qparam, 0, sizeof(qparam));
1145
55de908a
JB		 1146 rcu_read_lock();
1147 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1148 use_11b = (chanctx_conf &&
4bf88530 1149 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1150 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1151 rcu_read_unlock();
5825fe10 1152
a8ce8544
SG		 1153 /*
1154 * By default disable QoS in STA mode for old access points, which do
1155 * not support 802.11e. New APs will provide proper queue parameters,
1156 * that we will configure later.
1157 */
1158 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1159
239281f8
RL		 1160 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1161
1f4ffde8
FZ		 1162 /* Set defaults according to 802.11-2007 Table 7-37 */
1163 aCWmax = 1023;
1164 if (use_11b)
1165 aCWmin = 31;
1166 else
1167 aCWmin = 15;
1168
1169 /* Confiure old 802.11b/g medium access rules. */
1170 qparam.cw_max = aCWmax;
1171 qparam.cw_min = aCWmin;
1172 qparam.txop = 0;
1173 qparam.aifs = 2;
aa837e1d 1174
1f4ffde8
FZ		 1175 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1176 /* Update if QoS is enabled. */
a8ce8544
SG		 1177 if (enable_qos) {
1178 switch (ac) {
1179 case IEEE80211_AC_BK:
1180 qparam.cw_max = aCWmax;
1181 qparam.cw_min = aCWmin;
1182 qparam.txop = 0;
239281f8
RL		 1183 if (is_ocb)
1184 qparam.aifs = 9;
1185 else
1186 qparam.aifs = 7;
a8ce8544
SG		 1187 break;
1188 /* never happens but let's not leave undefined */
1189 default:
1190 case IEEE80211_AC_BE:
1191 qparam.cw_max = aCWmax;
1192 qparam.cw_min = aCWmin;
1193 qparam.txop = 0;
239281f8
RL		 1194 if (is_ocb)
1195 qparam.aifs = 6;
1196 else
1197 qparam.aifs = 3;
a8ce8544
SG		 1198 break;
1199 case IEEE80211_AC_VI:
1200 qparam.cw_max = aCWmin;
1201 qparam.cw_min = (aCWmin + 1) / 2 - 1;
239281f8
RL		 1202 if (is_ocb)
1203 qparam.txop = 0;
1204 else if (use_11b)
a8ce8544
SG		 1205 qparam.txop = 6016/32;
1206 else
1207 qparam.txop = 3008/32;
239281f8
RL		 1208
1209 if (is_ocb)
1210 qparam.aifs = 3;
1211 else
1212 qparam.aifs = 2;
a8ce8544
SG		 1213 break;
1214 case IEEE80211_AC_VO:
1215 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1216 qparam.cw_min = (aCWmin + 1) / 4 - 1;
239281f8
RL		 1217 if (is_ocb)
1218 qparam.txop = 0;
1219 else if (use_11b)
a8ce8544
SG		 1220 qparam.txop = 3264/32;
1221 else
1222 qparam.txop = 1504/32;
1223 qparam.aifs = 2;
1224 break;
1225 }
aa837e1d 1226 }
5825fe10 1227
ab13315a
KV		 1228 qparam.uapsd = false;
1229
54bcbc69
JB		 1230 sdata->tx_conf[ac] = qparam;
1231 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1232 }
e1b3ec1a 1233
f142c6b9
JB		 1234 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1235 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1236 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1237 if (bss_notify)
1238 ieee80211_bss_info_change_notify(sdata,
1239 BSS_CHANGED_QOS);
d9734979 1240 }
5825fe10 1241}
e50db65c 1242
46900298 1243void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1244 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1245 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1246 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1247 u32 tx_flags)
46900298
JB		 1248{
1249 struct ieee80211_local *local = sdata->local;
1250 struct sk_buff *skb;
1251 struct ieee80211_mgmt *mgmt;
fffd0934 1252 int err;
46900298 1253
15e230ab 1254 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1255 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1256 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1257 if (!skb)
46900298 1258 return;
d15b8459 1259
744462a9 1260 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1261
1262 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1263 memset(mgmt, 0, 24 + 6);
1264 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1265 IEEE80211_STYPE_AUTH);
efa6a09d 1266 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1267 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1268 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1269 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1270 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1271 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1272 if (extra)
1273 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1274
fffd0934
JB		 1275 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1276 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1277 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1278 WARN_ON(err);
1279 }
1280
1672c0e3
JB		 1281 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1282 tx_flags;
62ae67be 1283 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1284}
1285
6ae16775
AQ		 1286void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1287 const u8 *bssid, u16 stype, u16 reason,
1288 bool send_frame, u8 *frame_buf)
1289{
1290 struct ieee80211_local *local = sdata->local;
1291 struct sk_buff *skb;
1292 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1293
1294 /* build frame */
1295 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1296 mgmt->duration = 0; /* initialize only */
1297 mgmt->seq_ctrl = 0; /* initialize only */
1298 memcpy(mgmt->da, bssid, ETH_ALEN);
1299 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1300 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1301 /* u.deauth.reason_code == u.disassoc.reason_code */
1302 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1303
1304 if (send_frame) {
1305 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1306 IEEE80211_DEAUTH_FRAME_LEN);
1307 if (!skb)
1308 return;
1309
1310 skb_reserve(skb, local->hw.extra_tx_headroom);
1311
1312 /* copy in frame */
1313 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1314 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1315
1316 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1317 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1318 IEEE80211_SKB_CB(skb)->flags |=
1319 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1320
1321 ieee80211_tx_skb(sdata, skb);
1322 }
1323}
1324
c56ef672
DS		 1325static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1326 u8 *buffer, size_t buffer_len,
1327 const u8 *ie, size_t ie_len,
1328 enum ieee80211_band band,
1329 u32 rate_mask,
1330 struct cfg80211_chan_def *chandef,
1331 size_t *offset)
de95a54b
JB		 1332{
1333 struct ieee80211_supported_band *sband;
c604b9f2 1334 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1335 size_t noffset;
8e664fb3 1336 int supp_rates_len, i;
8dcb2003
JM		 1337 u8 rates[32];
1338 int num_rates;
1339 int ext_rates_len;
2103dec1
SW		 1340 int shift;
1341 u32 rate_flags;
40a11ca8 1342 bool have_80mhz = false;
de95a54b 1343
c56ef672
DS		 1344 *offset = 0;
1345
4d36ec58 1346 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1347 if (WARN_ON_ONCE(!sband))
1348 return 0;
de95a54b 1349
2103dec1
SW		 1350 rate_flags = ieee80211_chandef_rate_flags(chandef);
1351 shift = ieee80211_chandef_get_shift(chandef);
1352
8dcb2003
JM		 1353 num_rates = 0;
1354 for (i = 0; i < sband->n_bitrates; i++) {
1355 if ((BIT(i) & rate_mask) == 0)
1356 continue; /* skip rate */
2103dec1
SW		 1357 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1358 continue;
1359
1360 rates[num_rates++] =
1361 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1362 (1 << shift) * 5);
8dcb2003
JM		 1363 }
1364
1365 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1366
c604b9f2
JB		 1367 if (end - pos < 2 + supp_rates_len)
1368 goto out_err;
de95a54b 1369 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1370 *pos++ = supp_rates_len;
8dcb2003
JM		 1371 memcpy(pos, rates, supp_rates_len);
1372 pos += supp_rates_len;
8e664fb3
JB		 1373
1374 /* insert "request information" if in custom IEs */
1375 if (ie && ie_len) {
1376 static const u8 before_extrates[] = {
1377 WLAN_EID_SSID,
1378 WLAN_EID_SUPP_RATES,
1379 WLAN_EID_REQUEST,
1380 };
1381 noffset = ieee80211_ie_split(ie, ie_len,
1382 before_extrates,
1383 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1384 *offset);
1385 if (end - pos < noffset - *offset)
c604b9f2 1386 goto out_err;
c56ef672
DS		 1387 memcpy(pos, ie + *offset, noffset - *offset);
1388 pos += noffset - *offset;
1389 *offset = noffset;
8e664fb3
JB		 1390 }
1391
8dcb2003
JM		 1392 ext_rates_len = num_rates - supp_rates_len;
1393 if (ext_rates_len > 0) {
c604b9f2
JB		 1394 if (end - pos < 2 + ext_rates_len)
1395 goto out_err;
8e664fb3 1396 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1397 *pos++ = ext_rates_len;
1398 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1399 pos += ext_rates_len;
8e664fb3
JB		 1400 }
1401
2103dec1 1402 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1403 if (end - pos < 3)
1404 goto out_err;
651b5225
JM		 1405 *pos++ = WLAN_EID_DS_PARAMS;
1406 *pos++ = 1;
2103dec1
SW		 1407 *pos++ = ieee80211_frequency_to_channel(
1408 chandef->chan->center_freq);
651b5225
JM		 1409 }
1410
8e664fb3
JB		 1411 /* insert custom IEs that go before HT */
1412 if (ie && ie_len) {
1413 static const u8 before_ht[] = {
1414 WLAN_EID_SSID,
1415 WLAN_EID_SUPP_RATES,
1416 WLAN_EID_REQUEST,
1417 WLAN_EID_EXT_SUPP_RATES,
1418 WLAN_EID_DS_PARAMS,
1419 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1420 };
1421 noffset = ieee80211_ie_split(ie, ie_len,
1422 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1423 *offset);
1424 if (end - pos < noffset - *offset)
c604b9f2 1425 goto out_err;
c56ef672
DS		 1426 memcpy(pos, ie + *offset, noffset - *offset);
1427 pos += noffset - *offset;
1428 *offset = noffset;
de95a54b
JB		 1429 }
1430
c604b9f2
JB		 1431 if (sband->ht_cap.ht_supported) {
1432 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1433 goto out_err;
ef96a842
BG		 1434 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1435 sband->ht_cap.cap);
c604b9f2 1436 }
5ef2d41a 1437
de95a54b
JB		 1438 /*
1439 * If adding more here, adjust code in main.c
1440 * that calculates local->scan_ies_len.
1441 */
1442
4d952300 1443 /* insert custom IEs that go before VHT */
8e664fb3 1444 if (ie && ie_len) {
4d952300
JB		 1445 static const u8 before_vht[] = {
1446 WLAN_EID_SSID,
1447 WLAN_EID_SUPP_RATES,
1448 WLAN_EID_REQUEST,
1449 WLAN_EID_EXT_SUPP_RATES,
1450 WLAN_EID_DS_PARAMS,
1451 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1452 WLAN_EID_HT_CAPABILITY,
1453 WLAN_EID_BSS_COEX_2040,
1454 WLAN_EID_EXT_CAPABILITY,
1455 WLAN_EID_SSID_LIST,
1456 WLAN_EID_CHANNEL_USAGE,
1457 WLAN_EID_INTERWORKING,
1458 /* mesh ID can't happen here */
1459 /* 60 GHz can't happen here right now */
1460 };
1461 noffset = ieee80211_ie_split(ie, ie_len,
1462 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1463 *offset);
1464 if (end - pos < noffset - *offset)
c604b9f2 1465 goto out_err;
c56ef672
DS		 1466 memcpy(pos, ie + *offset, noffset - *offset);
1467 pos += noffset - *offset;
1468 *offset = noffset;
de95a54b
JB		 1469 }
1470
40a11ca8
JB		 1471 /* Check if any channel in this sband supports at least 80 MHz */
1472 for (i = 0; i < sband->n_channels; i++) {
fa44b988
AN		 1473 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1474 IEEE80211_CHAN_NO_80MHZ))
1475 continue;
1476
1477 have_80mhz = true;
1478 break;
40a11ca8
JB		 1479 }
1480
1481 if (sband->vht_cap.vht_supported && have_80mhz) {
c604b9f2
JB		 1482 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1483 goto out_err;
ba0afa2f
MP		 1484 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1485 sband->vht_cap.cap);
c604b9f2 1486 }
ba0afa2f 1487
c604b9f2
JB		 1488 return pos - buffer;
1489 out_err:
1490 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1491 return pos - buffer;
1492}
1493
c56ef672
DS		 1494int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1495 size_t buffer_len,
1496 struct ieee80211_scan_ies *ie_desc,
1497 const u8 *ie, size_t ie_len,
1498 u8 bands_used, u32 *rate_masks,
1499 struct cfg80211_chan_def *chandef)
1500{
1501 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1502 int i;
1503
1504 memset(ie_desc, 0, sizeof(*ie_desc));
1505
1506 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1507 if (bands_used & BIT(i)) {
1508 pos += ieee80211_build_preq_ies_band(local,
1509 buffer + pos,
1510 buffer_len - pos,
1511 ie, ie_len, i,
1512 rate_masks[i],
1513 chandef,
1514 &custom_ie_offset);
1515 ie_desc->ies[i] = buffer + old_pos;
1516 ie_desc->len[i] = pos - old_pos;
1517 old_pos = pos;
1518 }
1519 }
1520
1521 /* add any remaining custom IEs */
1522 if (ie && ie_len) {
1523 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1524 "not enough space for preq custom IEs\n"))
1525 return pos;
1526 memcpy(buffer + pos, ie + custom_ie_offset,
1527 ie_len - custom_ie_offset);
1528 ie_desc->common_ies = buffer + pos;
1529 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1530 pos += ie_len - custom_ie_offset;
1531 }
1532
1533 return pos;
1534};
1535
a619a4c0 1536struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
a344d677
JB		 1537 const u8 *src, const u8 *dst,
1538 u32 ratemask,
6b77863b 1539 struct ieee80211_channel *chan,
a619a4c0 1540 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1541 const u8 *ie, size_t ie_len,
1542 bool directed)
46900298
JB		 1543{
1544 struct ieee80211_local *local = sdata->local;
2103dec1 1545 struct cfg80211_chan_def chandef;
46900298
JB		 1546 struct sk_buff *skb;
1547 struct ieee80211_mgmt *mgmt;
b9a9ada1 1548 int ies_len;
c56ef672
DS		 1549 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1550 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1551
a806c558
PS		 1552 /*
1553 * Do not send DS Channel parameter for directed probe requests
1554 * in order to maximize the chance that we get a response. Some
1555 * badly-behaved APs don't respond when this parameter is included.
1556 */
2103dec1 1557 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1558 if (directed)
2103dec1 1559 chandef.chan = NULL;
a806c558 1560 else
2103dec1 1561 chandef.chan = chan;
651b5225 1562
a344d677
JB		 1563 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1564 100 + ie_len);
5b2bbf75 1565 if (!skb)
b9a9ada1
JB		 1566 return NULL;
1567
c56ef672 1568 rate_masks[chan->band] = ratemask;
b9a9ada1 1569 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1570 skb_tailroom(skb), &dummy_ie_desc,
1571 ie, ie_len, BIT(chan->band),
1572 rate_masks, &chandef);
b9a9ada1 1573 skb_put(skb, ies_len);
7c12ce8b 1574
46900298 1575 if (dst) {
7c12ce8b 1576 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1577 memcpy(mgmt->da, dst, ETH_ALEN);
1578 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1579 }
46900298 1580
62ae67be 1581 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1582
a619a4c0
JO		 1583 return skb;
1584}
1585
a344d677
JB		 1586void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1587 const u8 *src, const u8 *dst,
a619a4c0 1588 const u8 *ssid, size_t ssid_len,
a806c558 1589 const u8 *ie, size_t ie_len,
1672c0e3 1590 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1591 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1592{
1593 struct sk_buff *skb;
1594
a344d677 1595 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
6b77863b 1596 ssid, ssid_len,
85a237fe 1597 ie, ie_len, directed);
aad14ceb 1598 if (skb) {
1672c0e3 1599 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1600 if (scan)
1601 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1602 else
1603 ieee80211_tx_skb(sdata, skb);
aad14ceb 1604 }
46900298
JB		 1605}
1606
2103dec1 1607u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1608 struct ieee802_11_elems *elems,
9ebb61a2 1609 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1610{
1611 struct ieee80211_supported_band *sband;
46900298 1612 size_t num_rates;
2103dec1
SW		 1613 u32 supp_rates, rate_flags;
1614 int i, j, shift;
1615 sband = sdata->local->hw.wiphy->bands[band];
1616
1617 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1618 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1619
4ee73f33
MK		 1620 if (WARN_ON(!sband))
1621 return 1;
46900298 1622
46900298
JB		 1623 num_rates = sband->n_bitrates;
1624 supp_rates = 0;
1625 for (i = 0; i < elems->supp_rates_len +
1626 elems->ext_supp_rates_len; i++) {
1627 u8 rate = 0;
1628 int own_rate;
9ebb61a2 1629 bool is_basic;
46900298
JB		 1630 if (i < elems->supp_rates_len)
1631 rate = elems->supp_rates[i];
1632 else if (elems->ext_supp_rates)
1633 rate = elems->ext_supp_rates
1634 [i - elems->supp_rates_len];
1635 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1636 is_basic = !!(rate & 0x80);
1637
1638 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1639 continue;
1640
1641 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1642 int brate;
1643 if ((rate_flags & sband->bitrates[j].flags)
1644 != rate_flags)
1645 continue;
1646
1647 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1648 1 << shift);
1649
1650 if (brate == own_rate) {
46900298 1651 supp_rates |= BIT(j);
9ebb61a2
AN		 1652 if (basic_rates && is_basic)
1653 *basic_rates |= BIT(j);
1654 }
1655 }
46900298
JB		 1656 }
1657 return supp_rates;
1658}
f2753ddb 1659
84f6a01c
JB		 1660void ieee80211_stop_device(struct ieee80211_local *local)
1661{
1662 ieee80211_led_radio(local, false);
67408c8c 1663 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1664
1665 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1666
1667 flush_workqueue(local->workqueue);
678f415f 1668 drv_stop(local);
84f6a01c
JB		 1669}
1670
f6837ba8
JB		 1671static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1672{
1673 struct ieee80211_sub_if_data *sdata;
1674 struct ieee80211_chanctx *ctx;
1675
1676 /*
1677 * We get here if during resume the device can't be restarted properly.
1678 * We might also get here if this happens during HW reset, which is a
1679 * slightly different situation and we need to drop all connections in
1680 * the latter case.
1681 *
1682 * Ask cfg80211 to turn off all interfaces, this will result in more
1683 * warnings but at least we'll then get into a clean stopped state.
1684 */
1685
1686 local->resuming = false;
1687 local->suspended = false;
1688 local->started = false;
1689
1690 /* scheduled scan clearly can't be running any more, but tell
1691 * cfg80211 and clear local state
1692 */
1693 ieee80211_sched_scan_end(local);
1694
1695 list_for_each_entry(sdata, &local->interfaces, list)
1696 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1697
1698 /* Mark channel contexts as not being in the driver any more to avoid
1699 * removing them from the driver during the shutdown process...
1700 */
1701 mutex_lock(&local->chanctx_mtx);
1702 list_for_each_entry(ctx, &local->chanctx_list, list)
1703 ctx->driver_present = false;
1704 mutex_unlock(&local->chanctx_mtx);
1705
1706 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1707}
1708
153a5fc4
SG		 1709static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1710 struct ieee80211_sub_if_data *sdata)
1711{
1712 struct ieee80211_chanctx_conf *conf;
1713 struct ieee80211_chanctx *ctx;
1714
1715 if (!local->use_chanctx)
1716 return;
1717
1718 mutex_lock(&local->chanctx_mtx);
1719 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1720 lockdep_is_held(&local->chanctx_mtx));
1721 if (conf) {
1722 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1723 drv_assign_vif_chanctx(local, sdata, ctx);
1724 }
1725 mutex_unlock(&local->chanctx_mtx);
1726}
1727
f2753ddb
JB		 1728int ieee80211_reconfig(struct ieee80211_local *local)
1729{
1730 struct ieee80211_hw *hw = &local->hw;
1731 struct ieee80211_sub_if_data *sdata;
55de908a 1732 struct ieee80211_chanctx *ctx;
f2753ddb 1733 struct sta_info *sta;
2683d65b 1734 int res, i;
d888130a 1735 bool reconfig_due_to_wowlan = false;
d43c6b6e 1736 struct ieee80211_sub_if_data *sched_scan_sdata;
6ea0a69c 1737 struct cfg80211_sched_scan_request *sched_scan_req;
d43c6b6e 1738 bool sched_scan_stopped = false;
d888130a 1739
0f8b8245
EP		 1740 /* nothing to do if HW shouldn't run */
1741 if (!local->open_count)
1742 goto wake_up;
1743
8f21b0ad 1744#ifdef CONFIG_PM
ceb99fe0
JB		 1745 if (local->suspended)
1746 local->resuming = true;
f2753ddb 1747
eecc4800 1748 if (local->wowlan) {
eecc4800 1749 res = drv_resume(local);
27b3eb9c 1750 local->wowlan = false;
eecc4800
JB		 1751 if (res < 0) {
1752 local->resuming = false;
1753 return res;
1754 }
1755 if (res == 0)
1756 goto wake_up;
1757 WARN_ON(res > 1);
1758 /*
1759 * res is 1, which means the driver requested
1760 * to go through a regular reset on wakeup.
1761 */
d888130a 1762 reconfig_due_to_wowlan = true;
eecc4800
JB		 1763 }
1764#endif
f2753ddb 1765
94f9b97b
JB		 1766 /*
1767 * Upon resume hardware can sometimes be goofy due to
1768 * various platform / driver / bus issues, so restarting
1769 * the device may at times not work immediately. Propagate
1770 * the error.
1771 */
1772 res = drv_start(local);
1773 if (res) {
f6837ba8
JB		 1774 if (local->suspended)
1775 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1776 else
1777 WARN(1, "Hardware became unavailable during restart.\n");
1778 ieee80211_handle_reconfig_failure(local);
94f9b97b 1779 return res;
f2753ddb
JB		 1780 }
1781
7f281975
YAP		 1782 /* setup fragmentation threshold */
1783 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1784
1785 /* setup RTS threshold */
1786 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1787
1788 /* reset coverage class */
1789 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1790
94f9b97b
JB		 1791 ieee80211_led_radio(local, true);
1792 ieee80211_mod_tpt_led_trig(local,
1793 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1794
f2753ddb 1795 /* add interfaces */
4b6f1dd6
JB		 1796 sdata = rtnl_dereference(local->monitor_sdata);
1797 if (sdata) {
3c3e21e7
JB		 1798 /* in HW restart it exists already */
1799 WARN_ON(local->resuming);
4b6f1dd6
JB		 1800 res = drv_add_interface(local, sdata);
1801 if (WARN_ON(res)) {
0c2bef46 1802 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1803 synchronize_net();
1804 kfree(sdata);
1805 }
1806 }
1807
f2753ddb
JB		 1808 list_for_each_entry(sdata, &local->interfaces, list) {
1809 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1810 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1811 ieee80211_sdata_running(sdata))
7b7eab6f 1812 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1813 }
1814
55de908a 1815 /* add channel contexts */
f0dea9c7
AS		 1816 if (local->use_chanctx) {
1817 mutex_lock(&local->chanctx_mtx);
1818 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1819 if (ctx->replace_state !=
1820 IEEE80211_CHANCTX_REPLACES_OTHER)
1821 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1822 mutex_unlock(&local->chanctx_mtx);
55de908a 1823
7df180f7
ZG		 1824 list_for_each_entry(sdata, &local->interfaces, list) {
1825 if (!ieee80211_sdata_running(sdata))
1826 continue;
1827 ieee80211_assign_chanctx(local, sdata);
1828 }
6352c87f 1829
7df180f7
ZG		 1830 sdata = rtnl_dereference(local->monitor_sdata);
1831 if (sdata && ieee80211_sdata_running(sdata))
1832 ieee80211_assign_chanctx(local, sdata);
1833 }
fe5f2559 1834
f2753ddb 1835 /* add STAs back */
34e89507
JB		 1836 mutex_lock(&local->sta_mtx);
1837 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1838 enum ieee80211_sta_state state;
f09603a2 1839
2e8d397e
AN		 1840 if (!sta->uploaded)
1841 continue;
1842
1843 /* AP-mode stations will be added later */
1844 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1845 continue;
1846
1847 for (state = IEEE80211_STA_NOTEXIST;
1848 state < sta->sta_state; state++)
1849 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1850 state + 1));
f2753ddb 1851 }
34e89507 1852 mutex_unlock(&local->sta_mtx);
f2753ddb 1853
2683d65b 1854 /* reconfigure tx conf */
54bcbc69
JB		 1855 if (hw->queues >= IEEE80211_NUM_ACS) {
1856 list_for_each_entry(sdata, &local->interfaces, list) {
1857 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1858 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1859 !ieee80211_sdata_running(sdata))
1860 continue;
f6f3def3 1861
54bcbc69
JB		 1862 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1863 drv_conf_tx(local, sdata, i,
1864 &sdata->tx_conf[i]);
1865 }
f6f3def3 1866 }
2683d65b 1867
f2753ddb
JB		 1868 /* reconfigure hardware */
1869 ieee80211_hw_config(local, ~0);
1870
f2753ddb 1871 ieee80211_configure_filter(local);
f2753ddb
JB		 1872
1873 /* Finally also reconfigure all the BSS information */
1874 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1875 u32 changed;
1876
9607e6b6 1877 if (!ieee80211_sdata_running(sdata))
f2753ddb 1878 continue;
ac8dd506
JB		 1879
1880 /* common change flags for all interface types */
1881 changed = BSS_CHANGED_ERP_CTS_PROT |
1882 BSS_CHANGED_ERP_PREAMBLE |
1883 BSS_CHANGED_ERP_SLOT |
1884 BSS_CHANGED_HT |
1885 BSS_CHANGED_BASIC_RATES |
1886 BSS_CHANGED_BEACON_INT |
1887 BSS_CHANGED_BSSID |
4ced3f74 1888 BSS_CHANGED_CQM |
55de47f6 1889 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1890 BSS_CHANGED_IDLE |
1891 BSS_CHANGED_TXPOWER;
ac8dd506 1892
f2753ddb
JB		 1893 switch (sdata->vif.type) {
1894 case NL80211_IFTYPE_STATION:
0d392e93 1895 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1896 BSS_CHANGED_ARP_FILTER |
1897 BSS_CHANGED_PS;
c65dd147 1898
989c6505
AB		 1899 /* Re-send beacon info report to the driver */
1900 if (sdata->u.mgd.have_beacon)
1901 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1902
8d61ffa5 1903 sdata_lock(sdata);
ac8dd506 1904 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1905 sdata_unlock(sdata);
ac8dd506 1906 break;
6e0bd6c3 1907 case NL80211_IFTYPE_OCB:
239281f8
RL		 1908 changed |= BSS_CHANGED_OCB;
1909 ieee80211_bss_info_change_notify(sdata, changed);
6e0bd6c3 1910 break;
f2753ddb 1911 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1912 changed |= BSS_CHANGED_IBSS;
1913 /* fall through */
f2753ddb 1914 case NL80211_IFTYPE_AP:
339afbf4 1915 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1916
1041638f 1917 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1918 changed |= BSS_CHANGED_AP_PROBE_RESP;
1919
1041638f
JB		 1920 if (rcu_access_pointer(sdata->u.ap.beacon))
1921 drv_start_ap(local, sdata);
1922 }
1923
7827493b 1924 /* fall through */
f2753ddb 1925 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1926 if (sdata->vif.bss_conf.enable_beacon) {
1927 changed |= BSS_CHANGED_BEACON |
1928 BSS_CHANGED_BEACON_ENABLED;
1929 ieee80211_bss_info_change_notify(sdata, changed);
1930 }
f2753ddb
JB		 1931 break;
1932 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1933 case NL80211_IFTYPE_AP_VLAN:
1934 case NL80211_IFTYPE_MONITOR:
98104fde 1935 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1936 /* nothing to do */
f142c6b9 1937 break;
f2753ddb 1938 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1939 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1940 case NL80211_IFTYPE_P2P_CLIENT:
1941 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1942 WARN_ON(1);
1943 break;
1944 }
1945 }
1946
8e1b23b9
ES		 1947 ieee80211_recalc_ps(local, -1);
1948
6e1b1b24
EP		 1949 /*
1950 * The sta might be in psm against the ap (e.g. because
1951 * this was the state before a hw restart), so we
1952 * explicitly send a null packet in order to make sure
1953 * it'll sync against the ap (and get out of psm).
1954 */
1955 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1956 list_for_each_entry(sdata, &local->interfaces, list) {
1957 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1958 continue;
20f544ee
JB		 1959 if (!sdata->u.mgd.associated)
1960 continue;
6e1b1b24
EP		 1961
1962 ieee80211_send_nullfunc(local, sdata, 0);
1963 }
1964 }
1965
2e8d397e
AN		 1966 /* APs are now beaconing, add back stations */
1967 mutex_lock(&local->sta_mtx);
1968 list_for_each_entry(sta, &local->sta_list, list) {
1969 enum ieee80211_sta_state state;
1970
1971 if (!sta->uploaded)
1972 continue;
1973
1974 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1975 continue;
1976
1977 for (state = IEEE80211_STA_NOTEXIST;
1978 state < sta->sta_state; state++)
1979 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1980 state + 1));
1981 }
1982 mutex_unlock(&local->sta_mtx);
1983
7b21aea0
ES		 1984 /* add back keys */
1985 list_for_each_entry(sdata, &local->interfaces, list)
1986 if (ieee80211_sdata_running(sdata))
1987 ieee80211_enable_keys(sdata);
1988
c6209488 1989 wake_up:
04800ada
AN		 1990 local->in_reconfig = false;
1991 barrier();
1992
3c3e21e7
JB		 1993 if (local->monitors == local->open_count && local->monitors > 0)
1994 ieee80211_add_virtual_monitor(local);
1995
2a419056
JB		 1996 /*
1997 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1998 * sessions can be established after a resume.
1999 *
2000 * Also tear down aggregation sessions since reconfiguring
2001 * them in a hardware restart scenario is not easily done
2002 * right now, and the hardware will have lost information
2003 * about the sessions, but we and the AP still think they
2004 * are active. This is really a workaround though.
2005 */
74e2bd1f 2006 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 2007 mutex_lock(&local->sta_mtx);
2008
2009 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 2010 ieee80211_sta_tear_down_BA_sessions(
2011 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 2012 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 2013 }
2a419056
JB		 2014
2015 mutex_unlock(&local->sta_mtx);
74e2bd1f 2016 }
74e2bd1f 2017
445ea4e8 2018 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 2019 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2020 false);
f2753ddb 2021
32769814
AN		 2022 /*
2023 * Reconfigure sched scan if it was interrupted by FW restart or
2024 * suspend.
2025 */
2026 mutex_lock(&local->mtx);
2027 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2028 lockdep_is_held(&local->mtx));
6ea0a69c
JB		 2029 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2030 lockdep_is_held(&local->mtx));
2031 if (sched_scan_sdata && sched_scan_req)
32769814
AN		 2032 /*
2033 * Sched scan stopped, but we don't want to report it. Instead,
2034 * we're trying to reschedule.
2035 */
2036 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
6ea0a69c 2037 sched_scan_req))
32769814
AN		 2038 sched_scan_stopped = true;
2039 mutex_unlock(&local->mtx);
2040
2041 if (sched_scan_stopped)
e669ba2d 2042 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 2043
5bb644a0
JB		 2044 /*
2045 * If this is for hw restart things are still running.
2046 * We may want to change that later, however.
2047 */
0f8b8245 2048 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
cf2c92d8 2049 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
8f21b0ad
JB		 2050
2051 if (!local->suspended)
5bb644a0
JB		 2052 return 0;
2053
2054#ifdef CONFIG_PM
ceb99fe0 2055 /* first set suspended false, then resuming */
5bb644a0 2056 local->suspended = false;
ceb99fe0
JB		 2057 mb();
2058 local->resuming = false;
5bb644a0 2059
0f8b8245 2060 if (local->open_count && !reconfig_due_to_wowlan)
cf2c92d8
EP		 2061 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2062
b8360ab8
JB		 2063 list_for_each_entry(sdata, &local->interfaces, list) {
2064 if (!ieee80211_sdata_running(sdata))
2065 continue;
2066 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2067 ieee80211_sta_restart(sdata);
2068 }
2069
26d59535 2070 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 2071#else
2072 WARN_ON(1);
2073#endif
d43c6b6e 2074
f2753ddb
JB		 2075 return 0;
2076}
42935eca 2077
95acac61
JB		 2078void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2079{
2080 struct ieee80211_sub_if_data *sdata;
2081 struct ieee80211_local *local;
2082 struct ieee80211_key *key;
2083
2084 if (WARN_ON(!vif))
2085 return;
2086
2087 sdata = vif_to_sdata(vif);
2088 local = sdata->local;
2089
2090 if (WARN_ON(!local->resuming))
2091 return;
2092
2093 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2094 return;
2095
2096 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2097
2098 mutex_lock(&local->key_mtx);
2099 list_for_each_entry(key, &sdata->key_list, list)
2100 key->flags |= KEY_FLAG_TAINTED;
2101 mutex_unlock(&local->key_mtx);
2102}
2103EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2104
04ecd257 2105void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2106{
04ecd257
JB		 2107 struct ieee80211_local *local = sdata->local;
2108 struct ieee80211_chanctx_conf *chanctx_conf;
2109 struct ieee80211_chanctx *chanctx;
025e6be2 2110
04ecd257 2111 mutex_lock(&local->chanctx_mtx);
0f78231b 2112
04ecd257
JB		 2113 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2114 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2115
04ecd257 2116 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2117 goto unlock;
0f78231b 2118
04ecd257
JB		 2119 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2120 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2121 unlock:
04ecd257 2122 mutex_unlock(&local->chanctx_mtx);
0f78231b 2123}
8e664fb3 2124
21f659bf
EP		 2125void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2126{
2127 struct ieee80211_local *local = sdata->local;
2128 struct ieee80211_chanctx_conf *chanctx_conf;
2129 struct ieee80211_chanctx *chanctx;
2130
2131 mutex_lock(&local->chanctx_mtx);
2132
2133 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2134 lockdep_is_held(&local->chanctx_mtx));
2135
2136 if (WARN_ON_ONCE(!chanctx_conf))
2137 goto unlock;
2138
2139 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2140 ieee80211_recalc_chanctx_min_def(local, chanctx);
2141 unlock:
2142 mutex_unlock(&local->chanctx_mtx);
2143}
2144
8e664fb3
JB		 2145static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2146{
2147 int i;
2148
2149 for (i = 0; i < n_ids; i++)
2150 if (ids[i] == id)
2151 return true;
2152 return false;
2153}
2154
8ed28747
JB		 2155size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2156 const u8 *ids, int n_ids,
2157 const u8 *after_ric, int n_after_ric,
2158 size_t offset)
8e664fb3
JB		 2159{
2160 size_t pos = offset;
2161
8ed28747
JB		 2162 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2163 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2164 pos += 2 + ies[pos + 1];
2165
2166 while (pos < ielen &&
2167 !ieee80211_id_in_list(after_ric, n_after_ric,
2168 ies[pos]))
2169 pos += 2 + ies[pos + 1];
2170 } else {
2171 pos += 2 + ies[pos + 1];
2172 }
2173 }
8e664fb3
JB		 2174
2175 return pos;
2176}
8ed28747
JB		 2177
2178size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2179 const u8 *ids, int n_ids, size_t offset)
2180{
2181 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2182}
a7f3a768 2183EXPORT_SYMBOL(ieee80211_ie_split);
8e664fb3
JB		 2184
2185size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2186{
2187 size_t pos = offset;
2188
2189 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2190 pos += 2 + ies[pos + 1];
2191
2192 return pos;
2193}
615f7b9b
MV		 2194
2195static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2196 int rssi_min_thold,
2197 int rssi_max_thold)
2198{
2199 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2200
2201 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2202 return;
2203
2204 /*
2205 * Scale up threshold values before storing it, as the RSSI averaging
2206 * algorithm uses a scaled up value as well. Change this scaling
2207 * factor if the RSSI averaging algorithm changes.
2208 */
2209 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2210 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2211}
2212
2213void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2214 int rssi_min_thold,
2215 int rssi_max_thold)
2216{
2217 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2218
2219 WARN_ON(rssi_min_thold == rssi_max_thold ||
2220 rssi_min_thold > rssi_max_thold);
2221
2222 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2223 rssi_max_thold);
2224}
2225EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2226
2227void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2228{
2229 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2230
2231 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2232}
2233EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2234
ef96a842 2235u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2236 u16 cap)
2237{
2238 __le16 tmp;
2239
2240 *pos++ = WLAN_EID_HT_CAPABILITY;
2241 *pos++ = sizeof(struct ieee80211_ht_cap);
2242 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2243
2244 /* capability flags */
2245 tmp = cpu_to_le16(cap);
2246 memcpy(pos, &tmp, sizeof(u16));
2247 pos += sizeof(u16);
2248
2249 /* AMPDU parameters */
ef96a842
BG		 2250 *pos++ = ht_cap->ampdu_factor |
2251 (ht_cap->ampdu_density <<
42e7aa77
AS		 2252 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2253
2254 /* MCS set */
ef96a842
BG		 2255 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2256 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2257
2258 /* extended capabilities */
2259 pos += sizeof(__le16);
2260
2261 /* BF capabilities */
2262 pos += sizeof(__le32);
2263
2264 /* antenna selection */
2265 pos += sizeof(u8);
2266
2267 return pos;
2268}
2269
ba0afa2f 2270u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2271 u32 cap)
ba0afa2f
MP		 2272{
2273 __le32 tmp;
2274
2275 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2276 *pos++ = sizeof(struct ieee80211_vht_cap);
2277 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2278
2279 /* capability flags */
2280 tmp = cpu_to_le32(cap);
2281 memcpy(pos, &tmp, sizeof(u32));
2282 pos += sizeof(u32);
2283
2284 /* VHT MCS set */
2285 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2286 pos += sizeof(vht_cap->vht_mcs);
2287
2288 return pos;
2289}
2290
074d46d1 2291u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2292 const struct cfg80211_chan_def *chandef,
431e3154 2293 u16 prot_mode)
42e7aa77 2294{
074d46d1 2295 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2296 /* Build HT Information */
074d46d1
JB		 2297 *pos++ = WLAN_EID_HT_OPERATION;
2298 *pos++ = sizeof(struct ieee80211_ht_operation);
2299 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2300 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2301 chandef->chan->center_freq);
2302 switch (chandef->width) {
2303 case NL80211_CHAN_WIDTH_160:
2304 case NL80211_CHAN_WIDTH_80P80:
2305 case NL80211_CHAN_WIDTH_80:
2306 case NL80211_CHAN_WIDTH_40:
2307 if (chandef->center_freq1 > chandef->chan->center_freq)
2308 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2309 else
2310 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2311 break;
42e7aa77 2312 default:
074d46d1 2313 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2314 break;
2315 }
aee286c2 2316 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2317 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2318 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2319 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2320
431e3154 2321 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2322 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2323
2324 /* It seems that Basic MCS set and Supported MCS set
2325 are identical for the first 10 bytes */
074d46d1
JB		 2326 memset(&ht_oper->basic_set, 0, 16);
2327 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2328
074d46d1 2329 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2330}
2331
4bf88530 2332void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2333 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2334 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2335{
2336 enum nl80211_channel_type channel_type;
2337
4bf88530
JB		 2338 if (!ht_oper) {
2339 cfg80211_chandef_create(chandef, control_chan,
2340 NL80211_CHAN_NO_HT);
2341 return;
2342 }
42e7aa77 2343
074d46d1 2344 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2345 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2346 channel_type = NL80211_CHAN_HT20;
2347 break;
2348 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2349 channel_type = NL80211_CHAN_HT40PLUS;
2350 break;
2351 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2352 channel_type = NL80211_CHAN_HT40MINUS;
2353 break;
2354 default:
2355 channel_type = NL80211_CHAN_NO_HT;
2356 }
2357
4bf88530 2358 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2359}
2360
2103dec1
SW		 2361int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2362 const struct ieee80211_supported_band *sband,
2363 const u8 *srates, int srates_len, u32 *rates)
2364{
2365 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2366 int shift = ieee80211_chandef_get_shift(chandef);
2367 struct ieee80211_rate *br;
2368 int brate, rate, i, j, count = 0;
2369
2370 *rates = 0;
2371
2372 for (i = 0; i < srates_len; i++) {
2373 rate = srates[i] & 0x7f;
2374
2375 for (j = 0; j < sband->n_bitrates; j++) {
2376 br = &sband->bitrates[j];
2377 if ((rate_flags & br->flags) != rate_flags)
2378 continue;
2379
2380 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2381 if (brate == rate) {
2382 *rates |= BIT(j);
2383 count++;
2384 break;
2385 }
2386 }
2387 }
2388 return count;
2389}
2390
fc8a7321 2391int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2392 struct sk_buff *skb, bool need_basic,
2393 enum ieee80211_band band)
768db343 2394{
768db343
AN		 2395 struct ieee80211_local *local = sdata->local;
2396 struct ieee80211_supported_band *sband;
2103dec1 2397 int rate, shift;
768db343 2398 u8 i, rates, *pos;
fc8a7321 2399 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2400 u32 rate_flags;
768db343 2401
2103dec1
SW		 2402 shift = ieee80211_vif_get_shift(&sdata->vif);
2403 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2404 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2405 rates = 0;
2406 for (i = 0; i < sband->n_bitrates; i++) {
2407 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2408 continue;
2409 rates++;
2410 }
768db343
AN		 2411 if (rates > 8)
2412 rates = 8;
2413
2414 if (skb_tailroom(skb) < rates + 2)
2415 return -ENOMEM;
2416
2417 pos = skb_put(skb, rates + 2);
2418 *pos++ = WLAN_EID_SUPP_RATES;
2419 *pos++ = rates;
2420 for (i = 0; i < rates; i++) {
657c3e0c 2421 u8 basic = 0;
2103dec1
SW		 2422 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2423 continue;
2424
657c3e0c
AN		 2425 if (need_basic && basic_rates & BIT(i))
2426 basic = 0x80;
768db343 2427 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2428 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2429 5 * (1 << shift));
2430 *pos++ = basic | (u8) rate;
768db343
AN		 2431 }
2432
2433 return 0;
2434}
2435
fc8a7321 2436int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2437 struct sk_buff *skb, bool need_basic,
2438 enum ieee80211_band band)
768db343 2439{
768db343
AN		 2440 struct ieee80211_local *local = sdata->local;
2441 struct ieee80211_supported_band *sband;
cc63ec76 2442 int rate, shift;
768db343 2443 u8 i, exrates, *pos;
fc8a7321 2444 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2445 u32 rate_flags;
2446
2447 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2448 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2449
6b77863b 2450 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2451 exrates = 0;
2452 for (i = 0; i < sband->n_bitrates; i++) {
2453 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2454 continue;
2455 exrates++;
2456 }
2457
768db343
AN		 2458 if (exrates > 8)
2459 exrates -= 8;
2460 else
2461 exrates = 0;
2462
2463 if (skb_tailroom(skb) < exrates + 2)
2464 return -ENOMEM;
2465
2466 if (exrates) {
2467 pos = skb_put(skb, exrates + 2);
2468 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2469 *pos++ = exrates;
2470 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2471 u8 basic = 0;
2103dec1
SW		 2472 if ((rate_flags & sband->bitrates[i].flags)
2473 != rate_flags)
2474 continue;
657c3e0c
AN		 2475 if (need_basic && basic_rates & BIT(i))
2476 basic = 0x80;
2103dec1
SW		 2477 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2478 5 * (1 << shift));
2479 *pos++ = basic | (u8) rate;
768db343
AN		 2480 }
2481 }
2482 return 0;
2483}
1dae27f8
WYG		 2484
2485int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2486{
2487 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2488 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2489
be6bcabc
WYG		 2490 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2491 /* non-managed type inferfaces */
2492 return 0;
2493 }
3a7bba64 2494 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2495}
0d8a0a17 2496EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2497
2498u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2499{
2500 if (!mcs)
2501 return 1;
2502
2503 /* TODO: consider rx_highest */
2504
2505 if (mcs->rx_mask[3])
2506 return 4;
2507 if (mcs->rx_mask[2])
2508 return 3;
2509 if (mcs->rx_mask[1])
2510 return 2;
2511 return 1;
2512}
f4bda337
TP		 2513
2514/**
2515 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2516 * @local: mac80211 hw info struct
2517 * @status: RX status
2518 * @mpdu_len: total MPDU length (including FCS)
2519 * @mpdu_offset: offset into MPDU to calculate timestamp at
2520 *
2521 * This function calculates the RX timestamp at the given MPDU offset, taking
2522 * into account what the RX timestamp was. An offset of 0 will just normalize
2523 * the timestamp to TSF at beginning of MPDU reception.
2524 */
2525u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2526 struct ieee80211_rx_status *status,
2527 unsigned int mpdu_len,
2528 unsigned int mpdu_offset)
2529{
2530 u64 ts = status->mactime;
2531 struct rate_info ri;
2532 u16 rate;
2533
2534 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2535 return 0;
2536
2537 memset(&ri, 0, sizeof(ri));
2538
2539 /* Fill cfg80211 rate info */
2540 if (status->flag & RX_FLAG_HT) {
2541 ri.mcs = status->rate_idx;
2542 ri.flags |= RATE_INFO_FLAGS_MCS;
2543 if (status->flag & RX_FLAG_40MHZ)
2544 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2545 if (status->flag & RX_FLAG_SHORT_GI)
2546 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2547 } else if (status->flag & RX_FLAG_VHT) {
2548 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2549 ri.mcs = status->rate_idx;
2550 ri.nss = status->vht_nss;
2551 if (status->flag & RX_FLAG_40MHZ)
2552 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
1b8d242a 2553 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
5614618e 2554 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
1b8d242a 2555 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
5614618e
JB		 2556 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2557 if (status->flag & RX_FLAG_SHORT_GI)
2558 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2559 } else {
2560 struct ieee80211_supported_band *sband;
2103dec1
SW		 2561 int shift = 0;
2562 int bitrate;
2563
2564 if (status->flag & RX_FLAG_10MHZ)
2565 shift = 1;
2566 if (status->flag & RX_FLAG_5MHZ)
2567 shift = 2;
f4bda337
TP		 2568
2569 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2570 bitrate = sband->bitrates[status->rate_idx].bitrate;
2571 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2572 }
2573
2574 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2575 if (WARN_ONCE(!rate,
2576 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2577 status->flag, status->rate_idx, status->vht_nss))
2578 return 0;
f4bda337
TP		 2579
2580 /* rewind from end of MPDU */
2581 if (status->flag & RX_FLAG_MACTIME_END)
2582 ts -= mpdu_len * 8 * 10 / rate;
2583
2584 ts += mpdu_offset * 8 * 10 / rate;
2585
2586 return ts;
2587}
164eb02d
SW		 2588
2589void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2590{
2591 struct ieee80211_sub_if_data *sdata;
d2859df5 2592 struct cfg80211_chan_def chandef;
164eb02d 2593
34a3740d 2594 mutex_lock(&local->mtx);
164eb02d
SW		 2595 mutex_lock(&local->iflist_mtx);
2596 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2597 /* it might be waiting for the local->mtx, but then
2598 * by the time it gets it, sdata->wdev.cac_started
2599 * will no longer be true
2600 */
2601 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2602
2603 if (sdata->wdev.cac_started) {
d2859df5 2604 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2605 ieee80211_vif_release_channel(sdata);
2606 cfg80211_cac_event(sdata->dev,
d2859df5 2607 &chandef,
164eb02d
SW		 2608 NL80211_RADAR_CAC_ABORTED,
2609 GFP_KERNEL);
2610 }
2611 }
2612 mutex_unlock(&local->iflist_mtx);
34a3740d 2613 mutex_unlock(&local->mtx);
164eb02d
SW		 2614}
2615
2616void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2617{
2618 struct ieee80211_local *local =
2619 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2620 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2621 struct ieee80211_chanctx *ctx;
2622 int num_chanctx = 0;
2623
2624 mutex_lock(&local->chanctx_mtx);
2625 list_for_each_entry(ctx, &local->chanctx_list, list) {
2626 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2627 continue;
2628
2629 num_chanctx++;
2630 chandef = ctx->conf.def;
2631 }
2632 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2633
2634 ieee80211_dfs_cac_cancel(local);
2635
486cf4c0
MK		 2636 if (num_chanctx > 1)
2637 /* XXX: multi-channel is not supported yet */
164eb02d 2638 WARN_ON(1);
84a3d1c9 2639 else
164eb02d 2640 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2641}
2642
2643void ieee80211_radar_detected(struct ieee80211_hw *hw)
2644{
2645 struct ieee80211_local *local = hw_to_local(hw);
2646
2647 trace_api_radar_detected(local);
2648
2649 ieee80211_queue_work(hw, &local->radar_detected_work);
2650}
2651EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2652
2653u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2654{
2655 u32 ret;
2656 int tmp;
2657
2658 switch (c->width) {
2659 case NL80211_CHAN_WIDTH_20:
2660 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2661 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2662 break;
2663 case NL80211_CHAN_WIDTH_40:
2664 c->width = NL80211_CHAN_WIDTH_20;
2665 c->center_freq1 = c->chan->center_freq;
2666 ret = IEEE80211_STA_DISABLE_40MHZ |
2667 IEEE80211_STA_DISABLE_VHT;
2668 break;
2669 case NL80211_CHAN_WIDTH_80:
2670 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2671 /* n_P40 */
2672 tmp /= 2;
2673 /* freq_P40 */
2674 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2675 c->width = NL80211_CHAN_WIDTH_40;
2676 ret = IEEE80211_STA_DISABLE_VHT;
2677 break;
2678 case NL80211_CHAN_WIDTH_80P80:
2679 c->center_freq2 = 0;
2680 c->width = NL80211_CHAN_WIDTH_80;
2681 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2682 IEEE80211_STA_DISABLE_160MHZ;
2683 break;
2684 case NL80211_CHAN_WIDTH_160:
2685 /* n_P20 */
2686 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2687 /* n_P80 */
2688 tmp /= 4;
2689 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2690 c->width = NL80211_CHAN_WIDTH_80;
2691 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2692 IEEE80211_STA_DISABLE_160MHZ;
2693 break;
2694 default:
2695 case NL80211_CHAN_WIDTH_20_NOHT:
2696 WARN_ON_ONCE(1);
2697 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2698 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2699 break;
2700 case NL80211_CHAN_WIDTH_5:
2701 case NL80211_CHAN_WIDTH_10:
2702 WARN_ON_ONCE(1);
2703 /* keep c->width */
2704 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2705 break;
2706 }
2707
2708 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2709
2710 return ret;
2711}
687da132
EG		 2712
2713/*
2714 * Returns true if smps_mode_new is strictly more restrictive than
2715 * smps_mode_old.
2716 */
2717bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2718 enum ieee80211_smps_mode smps_mode_new)
2719{
2720 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2721 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2722 return false;
2723
2724 switch (smps_mode_old) {
2725 case IEEE80211_SMPS_STATIC:
2726 return false;
2727 case IEEE80211_SMPS_DYNAMIC:
2728 return smps_mode_new == IEEE80211_SMPS_STATIC;
2729 case IEEE80211_SMPS_OFF:
2730 return smps_mode_new != IEEE80211_SMPS_OFF;
2731 default:
2732 WARN_ON(1);
2733 }
2734
2735 return false;
2736}
c6da674a
CYY		 2737
2738int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2739 struct cfg80211_csa_settings *csa_settings)
2740{
2741 struct sk_buff *skb;
2742 struct ieee80211_mgmt *mgmt;
2743 struct ieee80211_local *local = sdata->local;
2744 int freq;
2745 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2746 sizeof(mgmt->u.action.u.chan_switch);
2747 u8 *pos;
2748
2749 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2750 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2751 return -EOPNOTSUPP;
2752
2753 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2754 5 + /* channel switch announcement element */
2755 3 + /* secondary channel offset element */
2756 8); /* mesh channel switch parameters element */
2757 if (!skb)
2758 return -ENOMEM;
2759
2760 skb_reserve(skb, local->tx_headroom);
2761 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2762 memset(mgmt, 0, hdr_len);
2763 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2764 IEEE80211_STYPE_ACTION);
2765
2766 eth_broadcast_addr(mgmt->da);
2767 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2768 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2769 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2770 } else {
2771 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2772 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2773 }
2774 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2775 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2776 pos = skb_put(skb, 5);
2777 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2778 *pos++ = 3; /* IE length */
2779 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2780 freq = csa_settings->chandef.chan->center_freq;
2781 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2782 *pos++ = csa_settings->count; /* count */
2783
2784 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2785 enum nl80211_channel_type ch_type;
2786
2787 skb_put(skb, 3);
2788 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2789 *pos++ = 1; /* IE length */
2790 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2791 if (ch_type == NL80211_CHAN_HT40PLUS)
2792 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2793 else
2794 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2795 }
2796
2797 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2798 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2799
2800 skb_put(skb, 8);
2801 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2802 *pos++ = 6; /* IE length */
2803 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2804 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2805 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2806 *pos++ |= csa_settings->block_tx ?
2807 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2808 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2809 pos += 2;
ca91dc97 2810 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2811 pos += 2;
c6da674a
CYY		 2812 }
2813
2814 ieee80211_tx_skb(sdata, skb);
2815 return 0;
2816}
2475b1cc
MS		 2817
2818bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2819{
2820 return !(cs == NULL || cs->cipher == 0 ||
2821 cs->hdr_len < cs->pn_len + cs->pn_off ||
2822 cs->hdr_len <= cs->key_idx_off ||
2823 cs->key_idx_shift > 7 ||
2824 cs->key_idx_mask == 0);
2825}
2826
2827bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2828{
2829 int i;
2830
2831 /* Ensure we have enough iftype bitmap space for all iftype values */
2832 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2833
2834 for (i = 0; i < n; i++)
2835 if (!ieee80211_cs_valid(&cs[i]))
2836 return false;
2837
2838 return true;
2839}
2840
2841const struct ieee80211_cipher_scheme *
2842ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2843 enum nl80211_iftype iftype)
2844{
2845 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2846 int n = local->hw.n_cipher_schemes;
2847 int i;
2848 const struct ieee80211_cipher_scheme *cs = NULL;
2849
2850 for (i = 0; i < n; i++) {
2851 if (l[i].cipher == cipher) {
2852 cs = &l[i];
2853 break;
2854 }
2855 }
2856
2857 if (!cs || !(cs->iftype & BIT(iftype)))
2858 return NULL;
2859
2860 return cs;
2861}
2862
2863int ieee80211_cs_headroom(struct ieee80211_local *local,
2864 struct cfg80211_crypto_settings *crypto,
2865 enum nl80211_iftype iftype)
2866{
2867 const struct ieee80211_cipher_scheme *cs;
2868 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2869 int i;
2870
2871 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2872 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2873 iftype);
2874
2875 if (cs && headroom < cs->hdr_len)
2876 headroom = cs->hdr_len;
2877 }
2878
2879 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2880 if (cs && headroom < cs->hdr_len)
2881 headroom = cs->hdr_len;
2882
2883 return headroom;
2884}
a7022e65
FF		 2885
2886static bool
2887ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2888{
2889 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2890 int skip;
2891
2892 if (end > 0)
2893 return false;
2894
2895 /* End time is in the past, check for repetitions */
2896 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2897 if (data->count[i] < 255) {
2898 if (data->count[i] <= skip) {
2899 data->count[i] = 0;
2900 return false;
2901 }
2902
2903 data->count[i] -= skip;
2904 }
2905
2906 data->desc[i].start += skip * data->desc[i].interval;
2907
2908 return true;
2909}
2910
2911static bool
2912ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2913 s32 *offset)
2914{
2915 bool ret = false;
2916 int i;
2917
2918 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2919 s32 cur;
2920
2921 if (!data->count[i])
2922 continue;
2923
2924 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2925 ret = true;
2926
2927 cur = data->desc[i].start - tsf;
2928 if (cur > *offset)
2929 continue;
2930
2931 cur = data->desc[i].start + data->desc[i].duration - tsf;
2932 if (cur > *offset)
2933 *offset = cur;
2934 }
2935
2936 return ret;
2937}
2938
2939static u32
2940ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2941{
2942 s32 offset = 0;
2943 int tries = 0;
2944 /*
2945 * arbitrary limit, used to avoid infinite loops when combined NoA
2946 * descriptors cover the full time period.
2947 */
2948 int max_tries = 5;
2949
2950 ieee80211_extend_absent_time(data, tsf, &offset);
2951 do {
2952 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2953 break;
2954
2955 tries++;
2956 } while (tries < max_tries);
2957
2958 return offset;
2959}
2960
2961void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2962{
2963 u32 next_offset = BIT(31) - 1;
2964 int i;
2965
2966 data->absent = 0;
2967 data->has_next_tsf = false;
2968 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2969 s32 start;
2970
2971 if (!data->count[i])
2972 continue;
2973
2974 ieee80211_extend_noa_desc(data, tsf, i);
2975 start = data->desc[i].start - tsf;
2976 if (start <= 0)
2977 data->absent |= BIT(i);
2978
2979 if (next_offset > start)
2980 next_offset = start;
2981
2982 data->has_next_tsf = true;
2983 }
2984
2985 if (data->absent)
2986 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2987
2988 data->next_tsf = tsf + next_offset;
2989}
2990EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2991
2992int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2993 struct ieee80211_noa_data *data, u32 tsf)
2994{
2995 int ret = 0;
2996 int i;
2997
2998 memset(data, 0, sizeof(*data));
2999
3000 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3001 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3002
3003 if (!desc->count || !desc->duration)
3004 continue;
3005
3006 data->count[i] = desc->count;
3007 data->desc[i].start = le32_to_cpu(desc->start_time);
3008 data->desc[i].duration = le32_to_cpu(desc->duration);
3009 data->desc[i].interval = le32_to_cpu(desc->interval);
3010
3011 if (data->count[i] > 1 &&
3012 data->desc[i].interval < data->desc[i].duration)
3013 continue;
3014
3015 ieee80211_extend_noa_desc(data, tsf, i);
3016 ret++;
3017 }
3018
3019 if (ret)
3020 ieee80211_update_p2p_noa(data, tsf);
3021
3022 return ret;
3023}
3024EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 3025
3026void ieee80211_recalc_dtim(struct ieee80211_local *local,
3027 struct ieee80211_sub_if_data *sdata)
3028{
3029 u64 tsf = drv_get_tsf(local, sdata);
3030 u64 dtim_count = 0;
3031 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3032 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3033 struct ps_data *ps;
3034 u8 bcns_from_dtim;
3035
3036 if (tsf == -1ULL || !beacon_int || !dtim_period)
3037 return;
3038
3039 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3040 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3041 if (!sdata->bss)
3042 return;
3043
3044 ps = &sdata->bss->ps;
3045 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3046 ps = &sdata->u.mesh.ps;
3047 } else {
3048 return;
3049 }
3050
3051 /*
3052 * actually finds last dtim_count, mac80211 will update in
3053 * __beacon_add_tim().
3054 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3055 */
3056 do_div(tsf, beacon_int);
3057 bcns_from_dtim = do_div(tsf, dtim_period);
3058 /* just had a DTIM */
3059 if (!bcns_from_dtim)
3060 dtim_count = 0;
3061 else
3062 dtim_count = dtim_period - bcns_from_dtim;
3063
3064 ps->dtim_count = dtim_count;
3065}
73de86a3 3066
71e6195e
MK		 3067static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3068 struct ieee80211_chanctx *ctx)
3069{
3070 struct ieee80211_sub_if_data *sdata;
3071 u8 radar_detect = 0;
3072
3073 lockdep_assert_held(&local->chanctx_mtx);
3074
3075 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3076 return 0;
3077
3078 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3079 if (sdata->reserved_radar_required)
3080 radar_detect |= BIT(sdata->reserved_chandef.width);
3081
3082 /*
3083 * An in-place reservation context should not have any assigned vifs
3084 * until it replaces the other context.
3085 */
3086 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3087 !list_empty(&ctx->assigned_vifs));
3088
3089 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3090 if (sdata->radar_required)
3091 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3092
3093 return radar_detect;
3094}
3095
73de86a3
LC		 3096int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3097 const struct cfg80211_chan_def *chandef,
3098 enum ieee80211_chanctx_mode chanmode,
3099 u8 radar_detect)
3100{
3101 struct ieee80211_local *local = sdata->local;
3102 struct ieee80211_sub_if_data *sdata_iter;
3103 enum nl80211_iftype iftype = sdata->wdev.iftype;
3104 int num[NUM_NL80211_IFTYPES];
3105 struct ieee80211_chanctx *ctx;
b6a55015 3106 int num_different_channels = 0;
73de86a3
LC		 3107 int total = 1;
3108
3109 lockdep_assert_held(&local->chanctx_mtx);
3110
3111 if (WARN_ON(hweight32(radar_detect) > 1))
3112 return -EINVAL;
3113
b6a55015
LC		 3114 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3115 !chandef->chan))
73de86a3
LC		 3116 return -EINVAL;
3117
b6a55015
LC		 3118 if (chandef)
3119 num_different_channels = 1;
3120
73de86a3
LC		 3121 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3122 return -EINVAL;
3123
3124 /* Always allow software iftypes */
3125 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3126 if (radar_detect)
3127 return -EINVAL;
3128 return 0;
3129 }
3130
3131 memset(num, 0, sizeof(num));
3132
3133 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3134 num[iftype] = 1;
3135
3136 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3137 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3138 continue;
71e6195e 3139 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3140 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3141 num_different_channels++;
3142 continue;
3143 }
b6a55015 3144 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3145 cfg80211_chandef_compatible(chandef,
3146 &ctx->conf.def))
3147 continue;
3148 num_different_channels++;
3149 }
3150
3151 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3152 struct wireless_dev *wdev_iter;
3153
3154 wdev_iter = &sdata_iter->wdev;
3155
3156 if (sdata_iter == sdata ||
3157 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3158 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3159 continue;
3160
3161 num[wdev_iter->iftype]++;
3162 total++;
3163 }
3164
3165 if (total == 1 && !radar_detect)
3166 return 0;
3167
3168 return cfg80211_check_combinations(local->hw.wiphy,
3169 num_different_channels,
3170 radar_detect, num);
3171}
6fa001bc
MK		 3172
3173static void
3174ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3175 void *data)
3176{
3177 u32 *max_num_different_channels = data;
3178
3179 *max_num_different_channels = max(*max_num_different_channels,
3180 c->num_different_channels);
3181}
3182
3183int ieee80211_max_num_channels(struct ieee80211_local *local)
3184{
3185 struct ieee80211_sub_if_data *sdata;
3186 int num[NUM_NL80211_IFTYPES] = {};
3187 struct ieee80211_chanctx *ctx;
3188 int num_different_channels = 0;
3189 u8 radar_detect = 0;
3190 u32 max_num_different_channels = 1;
3191 int err;
3192
3193 lockdep_assert_held(&local->chanctx_mtx);
3194
3195 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3196 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3197 continue;
3198
6fa001bc
MK		 3199 num_different_channels++;
3200
71e6195e 3201 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3202 }
3203
3204 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3205 num[sdata->wdev.iftype]++;
3206
3207 err = cfg80211_iter_combinations(local->hw.wiphy,
3208 num_different_channels, radar_detect,
3209 num, ieee80211_iter_max_chans,
3210 &max_num_different_channels);
3211 if (err < 0)
3212 return err;
3213
3214 return max_num_different_channels;
3215}
40b861a0
AN		 3216
3217u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3218{
3219 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3220 *buf++ = 7; /* len */
3221 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3222 *buf++ = 0x50;
3223 *buf++ = 0xf2;
3224 *buf++ = 2; /* WME */
3225 *buf++ = 0; /* WME info */
3226 *buf++ = 1; /* WME ver */
3227 *buf++ = qosinfo; /* U-APSD no in use */
3228
3229 return buf;
3230}
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