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mac80211: add support for driver tx power reporting
[linux-block.git] / net / mac80211 / util.c
CommitLineData
c2d1560a
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
d98ad83e 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
c2d1560a
JB		 7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15#include <net/mac80211.h>
16#include <linux/netdevice.h>
bc3b2d7f 17#include <linux/export.h>
c2d1560a
JB		 18#include <linux/types.h>
19#include <linux/slab.h>
20#include <linux/skbuff.h>
21#include <linux/etherdevice.h>
22#include <linux/if_arp.h>
c2d1560a 23#include <linux/bitmap.h>
dd76986b 24#include <linux/crc32.h>
881d966b 25#include <net/net_namespace.h>
c2d1560a 26#include <net/cfg80211.h>
dabeb344 27#include <net/rtnetlink.h>
c2d1560a
JB		 28
29#include "ieee80211_i.h"
24487981 30#include "driver-ops.h"
2c8dccc7 31#include "rate.h"
ee385855 32#include "mesh.h"
c2d1560a 33#include "wme.h"
f2753ddb 34#include "led.h"
fffd0934 35#include "wep.h"
c2d1560a
JB		 36
37/* privid for wiphys to determine whether they belong to us or not */
8a47cea7 38const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
c2d1560a 39
9a95371a
LR		 40struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41{
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47}
48EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
c2d1560a 49
71364716 50u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
05c914fe 51 enum nl80211_iftype type)
c2d1560a 52{
a494bb1c 53 __le16 fc = hdr->frame_control;
c2d1560a 54
98f0b0a3
RR		 55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
c2d1560a
JB		 57 return NULL;
58
a494bb1c 59 if (ieee80211_is_data(fc)) {
98f0b0a3
RR		 60 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
a494bb1c
HH		 62
63 if (ieee80211_has_a4(fc))
c2d1560a 64 return NULL;
a494bb1c
HH		 65 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
c2d1560a 68 return hdr->addr2;
a494bb1c
HH		 69
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
98f0b0a3
RR		 74 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
c2d1560a 76 return hdr->addr3;
a494bb1c
HH		 77 }
78
79 if (ieee80211_is_ctl(fc)) {
f359d3fe 80 if (ieee80211_is_pspoll(fc))
c2d1560a 81 return hdr->addr1;
a494bb1c
HH		 82
83 if (ieee80211_is_back_req(fc)) {
71364716 84 switch (type) {
05c914fe 85 case NL80211_IFTYPE_STATION:
71364716 86 return hdr->addr2;
05c914fe
JB		 87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
71364716
RR		 89 return hdr->addr1;
90 default:
a494bb1c 91 break; /* fall through to the return */
71364716
RR		 92 }
93 }
c2d1560a
JB		 94 }
95
96 return NULL;
97}
98
5cf121c3 99void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
c2d1560a 100{
252b86c4 101 struct sk_buff *skb;
2de8e0d9
JB		 102 struct ieee80211_hdr *hdr;
103
252b86c4 104 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9
JB		 105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
252b86c4 107 }
c2d1560a
JB		 108}
109
4ee73f33 110int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
438b61b7
SW		 111 int rate, int erp, int short_preamble,
112 int shift)
c2d1560a
JB		 113{
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
438b61b7
SW		 123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
c2d1560a
JB		 126 */
127
4ee73f33 128 if (band == IEEE80211_BAND_5GHZ || erp) {
c2d1560a
JB		 129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
438b61b7 138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
c2d1560a
JB		 139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
c2d1560a 142 dur = 16; /* SIFS + signal ext */
438b61b7
SW		 143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
438b61b7
SW		 145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
2103dec1
SW		 151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
c2d1560a
JB		 157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175}
176
177/* Exported duration function for driver use */
32bfd35d
JB		 178__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
4ee73f33 180 enum ieee80211_band band,
8318d78a
JB		 181 size_t frame_len,
182 struct ieee80211_rate *rate)
c2d1560a 183{
25d834e1 184 struct ieee80211_sub_if_data *sdata;
c2d1560a 185 u16 dur;
438b61b7 186 int erp, shift = 0;
25d834e1 187 bool short_preamble = false;
c2d1560a 188
8318d78a 189 erp = 0;
25d834e1
JB		 190 if (vif) {
191 sdata = vif_to_sdata(vif);
bda3933a 192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 195 shift = ieee80211_vif_get_shift(vif);
25d834e1 196 }
8318d78a 197
4ee73f33 198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
438b61b7 199 short_preamble, shift);
c2d1560a
JB		 200
201 return cpu_to_le16(dur);
202}
203EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
32bfd35d
JB		 205__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
e039fa4a 207 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 208{
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
25d834e1 211 struct ieee80211_sub_if_data *sdata;
471b3efd 212 bool short_preamble;
2103dec1 213 int erp, shift = 0, bitrate;
c2d1560a 214 u16 dur;
2e92e6f2
JB		 215 struct ieee80211_supported_band *sband;
216
4ee73f33 217 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 218
25d834e1 219 short_preamble = false;
7e9ed188 220
e039fa4a 221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a
JB		 222
223 erp = 0;
25d834e1
JB		 224 if (vif) {
225 sdata = vif_to_sdata(vif);
bda3933a 226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 229 shift = ieee80211_vif_get_shift(vif);
25d834e1 230 }
c2d1560a 231
2103dec1
SW		 232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
c2d1560a 234 /* CTS duration */
2103dec1 235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 236 erp, short_preamble, shift);
c2d1560a 237 /* Data frame duration */
2103dec1 238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 239 erp, short_preamble, shift);
c2d1560a 240 /* ACK duration */
2103dec1 241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 242 erp, short_preamble, shift);
c2d1560a
JB		 243
244 return cpu_to_le16(dur);
245}
246EXPORT_SYMBOL(ieee80211_rts_duration);
247
32bfd35d
JB		 248__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
c2d1560a 250 size_t frame_len,
e039fa4a 251 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 252{
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
25d834e1 255 struct ieee80211_sub_if_data *sdata;
471b3efd 256 bool short_preamble;
2103dec1 257 int erp, shift = 0, bitrate;
c2d1560a 258 u16 dur;
2e92e6f2
JB		 259 struct ieee80211_supported_band *sband;
260
4ee73f33 261 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 262
25d834e1 263 short_preamble = false;
7e9ed188 264
e039fa4a 265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a 266 erp = 0;
25d834e1
JB		 267 if (vif) {
268 sdata = vif_to_sdata(vif);
bda3933a 269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 272 shift = ieee80211_vif_get_shift(vif);
25d834e1 273 }
c2d1560a 274
2103dec1
SW		 275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
c2d1560a 277 /* Data frame duration */
2103dec1 278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 279 erp, short_preamble, shift);
e039fa4a 280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
c2d1560a 281 /* ACK duration */
2103dec1 282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 283 erp, short_preamble, shift);
c2d1560a
JB		 284 }
285
286 return cpu_to_le16(dur);
287}
288EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
3a25a8c8
JB		 290void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291{
292 struct ieee80211_sub_if_data *sdata;
a6f38ac3
JB		 293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
3a25a8c8
JB		 297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
f142c6b9
JB		 301 if (!sdata->dev)
302 continue;
303
3a25a8c8
JB		 304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
a6f38ac3 308 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 309 int ac_queue = sdata->vif.hw_queue[ac];
310
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318}
319
ce7c9111 320static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 321 enum queue_stop_reason reason,
322 bool refcounted)
c2d1560a
JB		 323{
324 struct ieee80211_local *local = hw_to_local(hw);
325
b5878a2d
JB		 326 trace_wake_queue(local, queue, reason);
327
e4e72fb4
JB		 328 if (WARN_ON(queue >= hw->queues))
329 return;
ce7c9111 330
ada15125
JB		 331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
cca07b00
LC		 334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
96f5e66e
JB		 341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
7236fe29
JB		 346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
3a25a8c8 348 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 349 rcu_read_unlock();
350 } else
3b8d81e0 351 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 352}
ce7c9111 353
96f5e66e 354void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 355 enum queue_stop_reason reason,
356 bool refcounted)
ce7c9111
KV		 357{
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364}
365
366void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367{
368 ieee80211_wake_queue_by_reason(hw, queue,
cca07b00
LC		 369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
ce7c9111 371}
c2d1560a
JB		 372EXPORT_SYMBOL(ieee80211_wake_queue);
373
ce7c9111 374static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 375 enum queue_stop_reason reason,
376 bool refcounted)
c2d1560a
JB		 377{
378 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 379 struct ieee80211_sub_if_data *sdata;
a6f38ac3 380 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 381
b5878a2d
JB		 382 trace_stop_queue(local, queue, reason);
383
e4e72fb4
JB		 384 if (WARN_ON(queue >= hw->queues))
385 return;
96f5e66e 386
cca07b00
LC		 387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
ada15125 391
cca07b00
LC		 392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
cf0277e7 394
a6f38ac3
JB		 395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
cf0277e7 398 rcu_read_lock();
3a25a8c8
JB		 399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
f142c6b9
JB		 402 if (!sdata->dev)
403 continue;
404
a6f38ac3 405 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
cf0277e7 411 rcu_read_unlock();
c2d1560a 412}
ce7c9111 413
96f5e66e 414void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 415 enum queue_stop_reason reason,
416 bool refcounted)
ce7c9111
KV		 417{
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424}
425
426void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427{
428 ieee80211_stop_queue_by_reason(hw, queue,
cca07b00
LC		 429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
ce7c9111 431}
c2d1560a
JB		 432EXPORT_SYMBOL(ieee80211_stop_queue);
433
8f77f384
JB		 434void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436{
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
a7bc376c 439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 440 int queue = info->hw_queue;
a7bc376c
JB		 441
442 if (WARN_ON(!info->control.vif)) {
d4fa14cd 443 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 444 return;
445 }
8f77f384
JB		 446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00
LC		 448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
3b8d81e0 450 __skb_queue_tail(&local->pending[queue], skb);
cca07b00
LC		 451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
8f77f384
JB		 453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454}
455
e3685e03
JB		 456void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
8f77f384
JB		 458{
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
b0b97a8a 462 int queue, i;
8f77f384
JB		 463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 465 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
d4fa14cd 469 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 470 continue;
471 }
472
3a25a8c8 473 queue = info->hw_queue;
4644ae89
JB		 474
475 __ieee80211_stop_queue(hw, queue,
cca07b00
LC		 476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
4644ae89 478
3b8d81e0 479 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 480 }
481
3b8d81e0 482 for (i = 0; i < hw->queues; i++)
8f77f384 483 __ieee80211_wake_queue(hw, i,
cca07b00
LC		 484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
8f77f384 486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 487}
488
ce7c9111 489void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 490 unsigned long queues,
cca07b00
LC		 491 enum queue_stop_reason reason,
492 bool refcounted)
c2d1560a 493{
ce7c9111
KV		 494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
c2d1560a
JB		 496 int i;
497
ce7c9111
KV		 498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
445ea4e8 500 for_each_set_bit(i, &queues, hw->queues)
cca07b00 501 __ieee80211_stop_queue(hw, i, reason, refcounted);
ce7c9111
KV		 502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504}
505
506void ieee80211_stop_queues(struct ieee80211_hw *hw)
507{
445ea4e8 508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
c2d1560a
JB		 511}
512EXPORT_SYMBOL(ieee80211_stop_queues);
513
92ab8535
TW		 514int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515{
516 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 517 unsigned long flags;
518 int ret;
96f5e66e 519
e4e72fb4
JB		 520 if (WARN_ON(queue >= hw->queues))
521 return true;
96f5e66e 522
3b8d81e0 523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
92ab8535
TW		 528}
529EXPORT_SYMBOL(ieee80211_queue_stopped);
530
ce7c9111 531void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 532 unsigned long queues,
cca07b00
LC		 533 enum queue_stop_reason reason,
534 bool refcounted)
c2d1560a 535{
ce7c9111
KV		 536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
c2d1560a
JB		 538 int i;
539
ce7c9111
KV		 540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
445ea4e8 542 for_each_set_bit(i, &queues, hw->queues)
cca07b00 543 __ieee80211_wake_queue(hw, i, reason, refcounted);
ce7c9111
KV		 544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546}
547
548void ieee80211_wake_queues(struct ieee80211_hw *hw)
549{
445ea4e8 550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
c2d1560a
JB		 553}
554EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 555
26da23b6
LC		 556static unsigned int
557ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
39ecc01d 559{
26da23b6 560 unsigned int queues;
39ecc01d
JB		 561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
26da23b6
LC		 576 return queues;
577}
578
579void ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata)
581{
582 unsigned int queues;
583
584 if (!local->ops->flush)
585 return;
586
587 queues = ieee80211_get_vif_queues(local, sdata);
588
59f48fe2 589 ieee80211_stop_queues_by_reason(&local->hw, queues,
cca07b00
LC		 590 IEEE80211_QUEUE_STOP_REASON_FLUSH,
591 false);
445ea4e8 592
77be2c54 593 drv_flush(local, sdata, queues, false);
445ea4e8 594
59f48fe2 595 ieee80211_wake_queues_by_reason(&local->hw, queues,
cca07b00
LC		 596 IEEE80211_QUEUE_STOP_REASON_FLUSH,
597 false);
39ecc01d
JB		 598}
599
26da23b6
LC		 600void ieee80211_stop_vif_queues(struct ieee80211_local *local,
601 struct ieee80211_sub_if_data *sdata,
602 enum queue_stop_reason reason)
603{
604 ieee80211_stop_queues_by_reason(&local->hw,
605 ieee80211_get_vif_queues(local, sdata),
606 reason, true);
607}
608
609void ieee80211_wake_vif_queues(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata,
611 enum queue_stop_reason reason)
612{
613 ieee80211_wake_queues_by_reason(&local->hw,
614 ieee80211_get_vif_queues(local, sdata),
615 reason, true);
616}
617
c7c71066
JB		 618static void __iterate_active_interfaces(struct ieee80211_local *local,
619 u32 iter_flags,
620 void (*iterator)(void *data, u8 *mac,
621 struct ieee80211_vif *vif),
622 void *data)
dabeb344 623{
dabeb344
JB		 624 struct ieee80211_sub_if_data *sdata;
625
c7c71066 626 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 627 switch (sdata->vif.type) {
05c914fe 628 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 629 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
630 continue;
631 break;
05c914fe 632 case NL80211_IFTYPE_AP_VLAN:
2f561feb 633 continue;
2ca27bcf 634 default:
2f561feb
ID		 635 break;
636 }
8b2c9824
JB		 637 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
638 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
639 continue;
9607e6b6 640 if (ieee80211_sdata_running(sdata))
47846c9b 641 iterator(data, sdata->vif.addr,
2f561feb
ID		 642 &sdata->vif);
643 }
644
c7c71066
JB		 645 sdata = rcu_dereference_check(local->monitor_sdata,
646 lockdep_is_held(&local->iflist_mtx) ||
647 lockdep_rtnl_is_held());
8b2c9824
JB		 648 if (sdata &&
649 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
650 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 651 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 652}
685fb72b 653
c7c71066
JB		 654void ieee80211_iterate_active_interfaces(
655 struct ieee80211_hw *hw, u32 iter_flags,
656 void (*iterator)(void *data, u8 *mac,
657 struct ieee80211_vif *vif),
658 void *data)
659{
660 struct ieee80211_local *local = hw_to_local(hw);
661
662 mutex_lock(&local->iflist_mtx);
663 __iterate_active_interfaces(local, iter_flags, iterator, data);
c771c9d8 664 mutex_unlock(&local->iflist_mtx);
2f561feb
ID		 665}
666EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
667
668void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 669 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 670 void (*iterator)(void *data, u8 *mac,
671 struct ieee80211_vif *vif),
672 void *data)
673{
674 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 675
e38bad47 676 rcu_read_lock();
c7c71066
JB		 677 __iterate_active_interfaces(local, iter_flags, iterator, data);
678 rcu_read_unlock();
679}
680EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 681
c7c71066
JB		 682void ieee80211_iterate_active_interfaces_rtnl(
683 struct ieee80211_hw *hw, u32 iter_flags,
684 void (*iterator)(void *data, u8 *mac,
685 struct ieee80211_vif *vif),
686 void *data)
687{
688 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 689
c7c71066 690 ASSERT_RTNL();
685fb72b 691
c7c71066 692 __iterate_active_interfaces(local, iter_flags, iterator, data);
dabeb344 693}
c7c71066 694EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 695
0fc1e049
AN		 696static void __iterate_stations(struct ieee80211_local *local,
697 void (*iterator)(void *data,
698 struct ieee80211_sta *sta),
699 void *data)
700{
701 struct sta_info *sta;
702
703 list_for_each_entry_rcu(sta, &local->sta_list, list) {
704 if (!sta->uploaded)
705 continue;
706
707 iterator(data, &sta->sta);
708 }
709}
710
711void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
712 void (*iterator)(void *data,
713 struct ieee80211_sta *sta),
714 void *data)
715{
716 struct ieee80211_local *local = hw_to_local(hw);
717
718 rcu_read_lock();
719 __iterate_stations(local, iterator, data);
720 rcu_read_unlock();
721}
722EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
723
ad7e718c
JB		 724struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
725{
726 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
727
728 if (!ieee80211_sdata_running(sdata) ||
729 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
730 return NULL;
731 return &sdata->vif;
732}
733EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
734
42935eca
LR		 735/*
736 * Nothing should have been stuffed into the workqueue during
737 * the suspend->resume cycle. If this WARN is seen then there
738 * is a bug with either the driver suspend or something in
739 * mac80211 stuffing into the workqueue which we haven't yet
740 * cleared during mac80211's suspend cycle.
741 */
742static bool ieee80211_can_queue_work(struct ieee80211_local *local)
743{
ceb99fe0
JB		 744 if (WARN(local->suspended && !local->resuming,
745 "queueing ieee80211 work while going to suspend\n"))
746 return false;
42935eca
LR		 747
748 return true;
749}
750
751void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
752{
753 struct ieee80211_local *local = hw_to_local(hw);
754
755 if (!ieee80211_can_queue_work(local))
756 return;
757
758 queue_work(local->workqueue, work);
759}
760EXPORT_SYMBOL(ieee80211_queue_work);
761
762void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
763 struct delayed_work *dwork,
764 unsigned long delay)
765{
766 struct ieee80211_local *local = hw_to_local(hw);
767
768 if (!ieee80211_can_queue_work(local))
769 return;
770
771 queue_delayed_work(local->workqueue, dwork, delay);
772}
773EXPORT_SYMBOL(ieee80211_queue_delayed_work);
774
35d865af 775u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 776 struct ieee802_11_elems *elems,
777 u64 filter, u32 crc)
778{
779 size_t left = len;
35d865af 780 const u8 *pos = start;
dd76986b 781 bool calc_crc = filter != 0;
fcff4f10 782 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 783 const u8 *ie;
dd76986b 784
fcff4f10 785 bitmap_zero(seen_elems, 256);
dd76986b
JB		 786 memset(elems, 0, sizeof(*elems));
787 elems->ie_start = start;
788 elems->total_len = len;
789
790 while (left >= 2) {
791 u8 id, elen;
fcff4f10 792 bool elem_parse_failed;
dd76986b
JB		 793
794 id = *pos++;
795 elen = *pos++;
796 left -= 2;
797
fcff4f10
PS		 798 if (elen > left) {
799 elems->parse_error = true;
dd76986b 800 break;
fcff4f10
PS		 801 }
802
9690fb16
JB		 803 switch (id) {
804 case WLAN_EID_SSID:
805 case WLAN_EID_SUPP_RATES:
806 case WLAN_EID_FH_PARAMS:
807 case WLAN_EID_DS_PARAMS:
808 case WLAN_EID_CF_PARAMS:
809 case WLAN_EID_TIM:
810 case WLAN_EID_IBSS_PARAMS:
811 case WLAN_EID_CHALLENGE:
812 case WLAN_EID_RSN:
813 case WLAN_EID_ERP_INFO:
814 case WLAN_EID_EXT_SUPP_RATES:
815 case WLAN_EID_HT_CAPABILITY:
816 case WLAN_EID_HT_OPERATION:
817 case WLAN_EID_VHT_CAPABILITY:
818 case WLAN_EID_VHT_OPERATION:
819 case WLAN_EID_MESH_ID:
820 case WLAN_EID_MESH_CONFIG:
821 case WLAN_EID_PEER_MGMT:
822 case WLAN_EID_PREQ:
823 case WLAN_EID_PREP:
824 case WLAN_EID_PERR:
825 case WLAN_EID_RANN:
826 case WLAN_EID_CHANNEL_SWITCH:
827 case WLAN_EID_EXT_CHANSWITCH_ANN:
828 case WLAN_EID_COUNTRY:
829 case WLAN_EID_PWR_CONSTRAINT:
830 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 831 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 832 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 833 case WLAN_EID_CHAN_SWITCH_PARAM:
b2e506bf
JB		 834 /*
835 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
836 * that if the content gets bigger it might be needed more than once
837 */
9690fb16
JB		 838 if (test_bit(id, seen_elems)) {
839 elems->parse_error = true;
840 left -= elen;
841 pos += elen;
842 continue;
843 }
844 break;
fcff4f10 845 }
dd76986b
JB		 846
847 if (calc_crc && id < 64 && (filter & (1ULL << id)))
848 crc = crc32_be(crc, pos - 2, elen + 2);
849
fcff4f10
PS		 850 elem_parse_failed = false;
851
dd76986b
JB		 852 switch (id) {
853 case WLAN_EID_SSID:
854 elems->ssid = pos;
855 elems->ssid_len = elen;
856 break;
857 case WLAN_EID_SUPP_RATES:
858 elems->supp_rates = pos;
859 elems->supp_rates_len = elen;
860 break;
dd76986b 861 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 862 if (elen >= 1)
863 elems->ds_params = pos;
864 else
865 elem_parse_failed = true;
dd76986b 866 break;
dd76986b
JB		 867 case WLAN_EID_TIM:
868 if (elen >= sizeof(struct ieee80211_tim_ie)) {
869 elems->tim = (void *)pos;
870 elems->tim_len = elen;
fcff4f10
PS		 871 } else
872 elem_parse_failed = true;
dd76986b 873 break;
dd76986b
JB		 874 case WLAN_EID_CHALLENGE:
875 elems->challenge = pos;
876 elems->challenge_len = elen;
877 break;
878 case WLAN_EID_VENDOR_SPECIFIC:
879 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
880 pos[2] == 0xf2) {
881 /* Microsoft OUI (00:50:F2) */
882
883 if (calc_crc)
884 crc = crc32_be(crc, pos - 2, elen + 2);
885
441a33ba 886 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 887 /* OUI Type 2 - WMM IE */
888 if (pos[4] == 0) {
889 elems->wmm_info = pos;
890 elems->wmm_info_len = elen;
891 } else if (pos[4] == 1) {
892 elems->wmm_param = pos;
893 elems->wmm_param_len = elen;
894 }
895 }
896 }
897 break;
898 case WLAN_EID_RSN:
899 elems->rsn = pos;
900 elems->rsn_len = elen;
901 break;
902 case WLAN_EID_ERP_INFO:
1946bed9
JB		 903 if (elen >= 1)
904 elems->erp_info = pos;
905 else
906 elem_parse_failed = true;
dd76986b
JB		 907 break;
908 case WLAN_EID_EXT_SUPP_RATES:
909 elems->ext_supp_rates = pos;
910 elems->ext_supp_rates_len = elen;
911 break;
912 case WLAN_EID_HT_CAPABILITY:
913 if (elen >= sizeof(struct ieee80211_ht_cap))
914 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 915 else
916 elem_parse_failed = true;
dd76986b 917 break;
074d46d1
JB		 918 case WLAN_EID_HT_OPERATION:
919 if (elen >= sizeof(struct ieee80211_ht_operation))
920 elems->ht_operation = (void *)pos;
fcff4f10
PS		 921 else
922 elem_parse_failed = true;
dd76986b 923 break;
818255ea
MP		 924 case WLAN_EID_VHT_CAPABILITY:
925 if (elen >= sizeof(struct ieee80211_vht_cap))
926 elems->vht_cap_elem = (void *)pos;
927 else
928 elem_parse_failed = true;
929 break;
930 case WLAN_EID_VHT_OPERATION:
931 if (elen >= sizeof(struct ieee80211_vht_operation))
932 elems->vht_operation = (void *)pos;
933 else
934 elem_parse_failed = true;
935 break;
bee7f586
JB		 936 case WLAN_EID_OPMODE_NOTIF:
937 if (elen > 0)
938 elems->opmode_notif = pos;
939 else
940 elem_parse_failed = true;
941 break;
dd76986b
JB		 942 case WLAN_EID_MESH_ID:
943 elems->mesh_id = pos;
944 elems->mesh_id_len = elen;
945 break;
946 case WLAN_EID_MESH_CONFIG:
947 if (elen >= sizeof(struct ieee80211_meshconf_ie))
948 elems->mesh_config = (void *)pos;
fcff4f10
PS		 949 else
950 elem_parse_failed = true;
dd76986b
JB		 951 break;
952 case WLAN_EID_PEER_MGMT:
953 elems->peering = pos;
954 elems->peering_len = elen;
955 break;
3f52b7e3
MP		 956 case WLAN_EID_MESH_AWAKE_WINDOW:
957 if (elen >= 2)
958 elems->awake_window = (void *)pos;
959 break;
dd76986b
JB		 960 case WLAN_EID_PREQ:
961 elems->preq = pos;
962 elems->preq_len = elen;
963 break;
964 case WLAN_EID_PREP:
965 elems->prep = pos;
966 elems->prep_len = elen;
967 break;
968 case WLAN_EID_PERR:
969 elems->perr = pos;
970 elems->perr_len = elen;
971 break;
972 case WLAN_EID_RANN:
973 if (elen >= sizeof(struct ieee80211_rann_ie))
974 elems->rann = (void *)pos;
fcff4f10
PS		 975 else
976 elem_parse_failed = true;
dd76986b
JB		 977 break;
978 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 979 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
980 elem_parse_failed = true;
981 break;
982 }
983 elems->ch_switch_ie = (void *)pos;
dd76986b 984 break;
b4f286a1
JB		 985 case WLAN_EID_EXT_CHANSWITCH_ANN:
986 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
987 elem_parse_failed = true;
988 break;
989 }
990 elems->ext_chansw_ie = (void *)pos;
991 break;
85220d71
JB		 992 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
993 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
994 elem_parse_failed = true;
995 break;
996 }
997 elems->sec_chan_offs = (void *)pos;
998 break;
8f2535b9
CYY		 999 case WLAN_EID_CHAN_SWITCH_PARAM:
1000 if (elen !=
1001 sizeof(*elems->mesh_chansw_params_ie)) {
1002 elem_parse_failed = true;
1003 break;
1004 }
1005 elems->mesh_chansw_params_ie = (void *)pos;
1006 break;
b2e506bf
JB		 1007 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1008 if (!action ||
1009 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1010 elem_parse_failed = true;
1011 break;
1012 }
1013 elems->wide_bw_chansw_ie = (void *)pos;
1014 break;
1015 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1016 if (action) {
1017 elem_parse_failed = true;
1018 break;
1019 }
1020 /*
1021 * This is a bit tricky, but as we only care about
1022 * the wide bandwidth channel switch element, so
1023 * just parse it out manually.
1024 */
1025 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1026 pos, elen);
1027 if (ie) {
1028 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1029 elems->wide_bw_chansw_ie =
1030 (void *)(ie + 2);
1031 else
1032 elem_parse_failed = true;
1033 }
1034 break;
dd76986b
JB		 1035 case WLAN_EID_COUNTRY:
1036 elems->country_elem = pos;
1037 elems->country_elem_len = elen;
1038 break;
1039 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1040 if (elen != 1) {
1041 elem_parse_failed = true;
1042 break;
1043 }
dd76986b 1044 elems->pwr_constr_elem = pos;
dd76986b 1045 break;
c8d65917
SG		 1046 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1047 /* Lots of different options exist, but we only care
1048 * about the Dynamic Transmit Power Control element.
1049 * First check for the Cisco OUI, then for the DTPC
1050 * tag (0x00).
1051 */
1052 if (elen < 4) {
1053 elem_parse_failed = true;
1054 break;
1055 }
1056
1057 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1058 pos[2] != 0x96 || pos[3] != 0x00)
1059 break;
1060
1061 if (elen != 6) {
1062 elem_parse_failed = true;
1063 break;
1064 }
1065
1066 if (calc_crc)
1067 crc = crc32_be(crc, pos - 2, elen + 2);
1068
1069 elems->cisco_dtpc_elem = pos;
1070 break;
dd76986b 1071 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1072 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1073 elems->timeout_int = (void *)pos;
1074 else
1075 elem_parse_failed = true;
dd76986b
JB		 1076 break;
1077 default:
1078 break;
1079 }
1080
fcff4f10
PS		 1081 if (elem_parse_failed)
1082 elems->parse_error = true;
1083 else
5df45690 1084 __set_bit(id, seen_elems);
fcff4f10 1085
dd76986b
JB		 1086 left -= elen;
1087 pos += elen;
1088 }
1089
fcff4f10
PS		 1090 if (left != 0)
1091 elems->parse_error = true;
1092
dd76986b
JB		 1093 return crc;
1094}
1095
3abead59
JB		 1096void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1097 bool bss_notify)
5825fe10
JB		 1098{
1099 struct ieee80211_local *local = sdata->local;
1100 struct ieee80211_tx_queue_params qparam;
55de908a 1101 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1102 int ac;
a8ce8544 1103 bool use_11b, enable_qos;
aa837e1d 1104 int aCWmin, aCWmax;
5825fe10
JB		 1105
1106 if (!local->ops->conf_tx)
1107 return;
1108
54bcbc69
JB		 1109 if (local->hw.queues < IEEE80211_NUM_ACS)
1110 return;
1111
5825fe10
JB		 1112 memset(&qparam, 0, sizeof(qparam));
1113
55de908a
JB		 1114 rcu_read_lock();
1115 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1116 use_11b = (chanctx_conf &&
4bf88530 1117 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1118 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1119 rcu_read_unlock();
5825fe10 1120
a8ce8544
SG		 1121 /*
1122 * By default disable QoS in STA mode for old access points, which do
1123 * not support 802.11e. New APs will provide proper queue parameters,
1124 * that we will configure later.
1125 */
1126 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1127
1f4ffde8
FZ		 1128 /* Set defaults according to 802.11-2007 Table 7-37 */
1129 aCWmax = 1023;
1130 if (use_11b)
1131 aCWmin = 31;
1132 else
1133 aCWmin = 15;
1134
1135 /* Confiure old 802.11b/g medium access rules. */
1136 qparam.cw_max = aCWmax;
1137 qparam.cw_min = aCWmin;
1138 qparam.txop = 0;
1139 qparam.aifs = 2;
aa837e1d 1140
1f4ffde8
FZ		 1141 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1142 /* Update if QoS is enabled. */
a8ce8544
SG		 1143 if (enable_qos) {
1144 switch (ac) {
1145 case IEEE80211_AC_BK:
1146 qparam.cw_max = aCWmax;
1147 qparam.cw_min = aCWmin;
1148 qparam.txop = 0;
1149 qparam.aifs = 7;
1150 break;
1151 /* never happens but let's not leave undefined */
1152 default:
1153 case IEEE80211_AC_BE:
1154 qparam.cw_max = aCWmax;
1155 qparam.cw_min = aCWmin;
1156 qparam.txop = 0;
1157 qparam.aifs = 3;
1158 break;
1159 case IEEE80211_AC_VI:
1160 qparam.cw_max = aCWmin;
1161 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1162 if (use_11b)
1163 qparam.txop = 6016/32;
1164 else
1165 qparam.txop = 3008/32;
1166 qparam.aifs = 2;
1167 break;
1168 case IEEE80211_AC_VO:
1169 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1170 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1171 if (use_11b)
1172 qparam.txop = 3264/32;
1173 else
1174 qparam.txop = 1504/32;
1175 qparam.aifs = 2;
1176 break;
1177 }
aa837e1d 1178 }
5825fe10 1179
ab13315a
KV		 1180 qparam.uapsd = false;
1181
54bcbc69
JB		 1182 sdata->tx_conf[ac] = qparam;
1183 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1184 }
e1b3ec1a 1185
f142c6b9
JB		 1186 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1187 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1188 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1189 if (bss_notify)
1190 ieee80211_bss_info_change_notify(sdata,
1191 BSS_CHANGED_QOS);
d9734979 1192 }
5825fe10 1193}
e50db65c 1194
46900298 1195void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1196 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1197 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1198 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1199 u32 tx_flags)
46900298
JB		 1200{
1201 struct ieee80211_local *local = sdata->local;
1202 struct sk_buff *skb;
1203 struct ieee80211_mgmt *mgmt;
fffd0934 1204 int err;
46900298 1205
15e230ab 1206 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1207 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1208 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1209 if (!skb)
46900298 1210 return;
d15b8459 1211
744462a9 1212 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1213
1214 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1215 memset(mgmt, 0, 24 + 6);
1216 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1217 IEEE80211_STYPE_AUTH);
efa6a09d 1218 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1219 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1220 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1221 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1222 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1223 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1224 if (extra)
1225 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1226
fffd0934
JB		 1227 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1228 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1229 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1230 WARN_ON(err);
1231 }
1232
1672c0e3
JB		 1233 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1234 tx_flags;
62ae67be 1235 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1236}
1237
6ae16775
AQ		 1238void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1239 const u8 *bssid, u16 stype, u16 reason,
1240 bool send_frame, u8 *frame_buf)
1241{
1242 struct ieee80211_local *local = sdata->local;
1243 struct sk_buff *skb;
1244 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1245
1246 /* build frame */
1247 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1248 mgmt->duration = 0; /* initialize only */
1249 mgmt->seq_ctrl = 0; /* initialize only */
1250 memcpy(mgmt->da, bssid, ETH_ALEN);
1251 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1252 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1253 /* u.deauth.reason_code == u.disassoc.reason_code */
1254 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1255
1256 if (send_frame) {
1257 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1258 IEEE80211_DEAUTH_FRAME_LEN);
1259 if (!skb)
1260 return;
1261
1262 skb_reserve(skb, local->hw.extra_tx_headroom);
1263
1264 /* copy in frame */
1265 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1266 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1267
1268 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1269 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1270 IEEE80211_SKB_CB(skb)->flags |=
1271 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1272
1273 ieee80211_tx_skb(sdata, skb);
1274 }
1275}
1276
c56ef672
DS		 1277static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1278 u8 *buffer, size_t buffer_len,
1279 const u8 *ie, size_t ie_len,
1280 enum ieee80211_band band,
1281 u32 rate_mask,
1282 struct cfg80211_chan_def *chandef,
1283 size_t *offset)
de95a54b
JB		 1284{
1285 struct ieee80211_supported_band *sband;
c604b9f2 1286 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1287 size_t noffset;
8e664fb3 1288 int supp_rates_len, i;
8dcb2003
JM		 1289 u8 rates[32];
1290 int num_rates;
1291 int ext_rates_len;
2103dec1
SW		 1292 int shift;
1293 u32 rate_flags;
de95a54b 1294
c56ef672
DS		 1295 *offset = 0;
1296
4d36ec58 1297 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1298 if (WARN_ON_ONCE(!sband))
1299 return 0;
de95a54b 1300
2103dec1
SW		 1301 rate_flags = ieee80211_chandef_rate_flags(chandef);
1302 shift = ieee80211_chandef_get_shift(chandef);
1303
8dcb2003
JM		 1304 num_rates = 0;
1305 for (i = 0; i < sband->n_bitrates; i++) {
1306 if ((BIT(i) & rate_mask) == 0)
1307 continue; /* skip rate */
2103dec1
SW		 1308 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1309 continue;
1310
1311 rates[num_rates++] =
1312 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1313 (1 << shift) * 5);
8dcb2003
JM		 1314 }
1315
1316 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1317
c604b9f2
JB		 1318 if (end - pos < 2 + supp_rates_len)
1319 goto out_err;
de95a54b 1320 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1321 *pos++ = supp_rates_len;
8dcb2003
JM		 1322 memcpy(pos, rates, supp_rates_len);
1323 pos += supp_rates_len;
8e664fb3
JB		 1324
1325 /* insert "request information" if in custom IEs */
1326 if (ie && ie_len) {
1327 static const u8 before_extrates[] = {
1328 WLAN_EID_SSID,
1329 WLAN_EID_SUPP_RATES,
1330 WLAN_EID_REQUEST,
1331 };
1332 noffset = ieee80211_ie_split(ie, ie_len,
1333 before_extrates,
1334 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1335 *offset);
1336 if (end - pos < noffset - *offset)
c604b9f2 1337 goto out_err;
c56ef672
DS		 1338 memcpy(pos, ie + *offset, noffset - *offset);
1339 pos += noffset - *offset;
1340 *offset = noffset;
8e664fb3
JB		 1341 }
1342
8dcb2003
JM		 1343 ext_rates_len = num_rates - supp_rates_len;
1344 if (ext_rates_len > 0) {
c604b9f2
JB		 1345 if (end - pos < 2 + ext_rates_len)
1346 goto out_err;
8e664fb3 1347 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1348 *pos++ = ext_rates_len;
1349 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1350 pos += ext_rates_len;
8e664fb3
JB		 1351 }
1352
2103dec1 1353 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1354 if (end - pos < 3)
1355 goto out_err;
651b5225
JM		 1356 *pos++ = WLAN_EID_DS_PARAMS;
1357 *pos++ = 1;
2103dec1
SW		 1358 *pos++ = ieee80211_frequency_to_channel(
1359 chandef->chan->center_freq);
651b5225
JM		 1360 }
1361
8e664fb3
JB		 1362 /* insert custom IEs that go before HT */
1363 if (ie && ie_len) {
1364 static const u8 before_ht[] = {
1365 WLAN_EID_SSID,
1366 WLAN_EID_SUPP_RATES,
1367 WLAN_EID_REQUEST,
1368 WLAN_EID_EXT_SUPP_RATES,
1369 WLAN_EID_DS_PARAMS,
1370 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1371 };
1372 noffset = ieee80211_ie_split(ie, ie_len,
1373 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1374 *offset);
1375 if (end - pos < noffset - *offset)
c604b9f2 1376 goto out_err;
c56ef672
DS		 1377 memcpy(pos, ie + *offset, noffset - *offset);
1378 pos += noffset - *offset;
1379 *offset = noffset;
de95a54b
JB		 1380 }
1381
c604b9f2
JB		 1382 if (sband->ht_cap.ht_supported) {
1383 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1384 goto out_err;
ef96a842
BG		 1385 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1386 sband->ht_cap.cap);
c604b9f2 1387 }
5ef2d41a 1388
de95a54b
JB		 1389 /*
1390 * If adding more here, adjust code in main.c
1391 * that calculates local->scan_ies_len.
1392 */
1393
4d952300 1394 /* insert custom IEs that go before VHT */
8e664fb3 1395 if (ie && ie_len) {
4d952300
JB		 1396 static const u8 before_vht[] = {
1397 WLAN_EID_SSID,
1398 WLAN_EID_SUPP_RATES,
1399 WLAN_EID_REQUEST,
1400 WLAN_EID_EXT_SUPP_RATES,
1401 WLAN_EID_DS_PARAMS,
1402 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1403 WLAN_EID_HT_CAPABILITY,
1404 WLAN_EID_BSS_COEX_2040,
1405 WLAN_EID_EXT_CAPABILITY,
1406 WLAN_EID_SSID_LIST,
1407 WLAN_EID_CHANNEL_USAGE,
1408 WLAN_EID_INTERWORKING,
1409 /* mesh ID can't happen here */
1410 /* 60 GHz can't happen here right now */
1411 };
1412 noffset = ieee80211_ie_split(ie, ie_len,
1413 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1414 *offset);
1415 if (end - pos < noffset - *offset)
c604b9f2 1416 goto out_err;
c56ef672
DS		 1417 memcpy(pos, ie + *offset, noffset - *offset);
1418 pos += noffset - *offset;
1419 *offset = noffset;
de95a54b
JB		 1420 }
1421
c604b9f2
JB		 1422 if (sband->vht_cap.vht_supported) {
1423 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1424 goto out_err;
ba0afa2f
MP		 1425 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1426 sband->vht_cap.cap);
c604b9f2 1427 }
ba0afa2f 1428
c604b9f2
JB		 1429 return pos - buffer;
1430 out_err:
1431 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1432 return pos - buffer;
1433}
1434
c56ef672
DS		 1435int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1436 size_t buffer_len,
1437 struct ieee80211_scan_ies *ie_desc,
1438 const u8 *ie, size_t ie_len,
1439 u8 bands_used, u32 *rate_masks,
1440 struct cfg80211_chan_def *chandef)
1441{
1442 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1443 int i;
1444
1445 memset(ie_desc, 0, sizeof(*ie_desc));
1446
1447 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1448 if (bands_used & BIT(i)) {
1449 pos += ieee80211_build_preq_ies_band(local,
1450 buffer + pos,
1451 buffer_len - pos,
1452 ie, ie_len, i,
1453 rate_masks[i],
1454 chandef,
1455 &custom_ie_offset);
1456 ie_desc->ies[i] = buffer + old_pos;
1457 ie_desc->len[i] = pos - old_pos;
1458 old_pos = pos;
1459 }
1460 }
1461
1462 /* add any remaining custom IEs */
1463 if (ie && ie_len) {
1464 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1465 "not enough space for preq custom IEs\n"))
1466 return pos;
1467 memcpy(buffer + pos, ie + custom_ie_offset,
1468 ie_len - custom_ie_offset);
1469 ie_desc->common_ies = buffer + pos;
1470 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1471 pos += ie_len - custom_ie_offset;
1472 }
1473
1474 return pos;
1475};
1476
a619a4c0 1477struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
85a237fe 1478 u8 *dst, u32 ratemask,
6b77863b 1479 struct ieee80211_channel *chan,
a619a4c0 1480 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1481 const u8 *ie, size_t ie_len,
1482 bool directed)
46900298
JB		 1483{
1484 struct ieee80211_local *local = sdata->local;
2103dec1 1485 struct cfg80211_chan_def chandef;
46900298
JB		 1486 struct sk_buff *skb;
1487 struct ieee80211_mgmt *mgmt;
b9a9ada1 1488 int ies_len;
c56ef672
DS		 1489 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1490 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1491
a806c558
PS		 1492 /*
1493 * Do not send DS Channel parameter for directed probe requests
1494 * in order to maximize the chance that we get a response. Some
1495 * badly-behaved APs don't respond when this parameter is included.
1496 */
2103dec1 1497 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1498 if (directed)
2103dec1 1499 chandef.chan = NULL;
a806c558 1500 else
2103dec1 1501 chandef.chan = chan;
651b5225 1502
7c12ce8b 1503 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
b9a9ada1 1504 ssid, ssid_len, 100 + ie_len);
5b2bbf75 1505 if (!skb)
b9a9ada1
JB		 1506 return NULL;
1507
c56ef672 1508 rate_masks[chan->band] = ratemask;
b9a9ada1 1509 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1510 skb_tailroom(skb), &dummy_ie_desc,
1511 ie, ie_len, BIT(chan->band),
1512 rate_masks, &chandef);
b9a9ada1 1513 skb_put(skb, ies_len);
7c12ce8b 1514
46900298 1515 if (dst) {
7c12ce8b 1516 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1517 memcpy(mgmt->da, dst, ETH_ALEN);
1518 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1519 }
46900298 1520
62ae67be 1521 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1522
a619a4c0
JO		 1523 return skb;
1524}
1525
1526void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1527 const u8 *ssid, size_t ssid_len,
a806c558 1528 const u8 *ie, size_t ie_len,
1672c0e3 1529 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1530 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1531{
1532 struct sk_buff *skb;
1533
fe94fe05 1534 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
6b77863b 1535 ssid, ssid_len,
85a237fe 1536 ie, ie_len, directed);
aad14ceb 1537 if (skb) {
1672c0e3 1538 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1539 if (scan)
1540 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1541 else
1542 ieee80211_tx_skb(sdata, skb);
aad14ceb 1543 }
46900298
JB		 1544}
1545
2103dec1 1546u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1547 struct ieee802_11_elems *elems,
9ebb61a2 1548 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1549{
1550 struct ieee80211_supported_band *sband;
46900298 1551 size_t num_rates;
2103dec1
SW		 1552 u32 supp_rates, rate_flags;
1553 int i, j, shift;
1554 sband = sdata->local->hw.wiphy->bands[band];
1555
1556 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1557 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1558
4ee73f33
MK		 1559 if (WARN_ON(!sband))
1560 return 1;
46900298 1561
46900298
JB		 1562 num_rates = sband->n_bitrates;
1563 supp_rates = 0;
1564 for (i = 0; i < elems->supp_rates_len +
1565 elems->ext_supp_rates_len; i++) {
1566 u8 rate = 0;
1567 int own_rate;
9ebb61a2 1568 bool is_basic;
46900298
JB		 1569 if (i < elems->supp_rates_len)
1570 rate = elems->supp_rates[i];
1571 else if (elems->ext_supp_rates)
1572 rate = elems->ext_supp_rates
1573 [i - elems->supp_rates_len];
1574 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1575 is_basic = !!(rate & 0x80);
1576
1577 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1578 continue;
1579
1580 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1581 int brate;
1582 if ((rate_flags & sband->bitrates[j].flags)
1583 != rate_flags)
1584 continue;
1585
1586 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1587 1 << shift);
1588
1589 if (brate == own_rate) {
46900298 1590 supp_rates |= BIT(j);
9ebb61a2
AN		 1591 if (basic_rates && is_basic)
1592 *basic_rates |= BIT(j);
1593 }
1594 }
46900298
JB		 1595 }
1596 return supp_rates;
1597}
f2753ddb 1598
84f6a01c
JB		 1599void ieee80211_stop_device(struct ieee80211_local *local)
1600{
1601 ieee80211_led_radio(local, false);
67408c8c 1602 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1603
1604 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1605
1606 flush_workqueue(local->workqueue);
678f415f 1607 drv_stop(local);
84f6a01c
JB		 1608}
1609
f6837ba8
JB		 1610static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1611{
1612 struct ieee80211_sub_if_data *sdata;
1613 struct ieee80211_chanctx *ctx;
1614
1615 /*
1616 * We get here if during resume the device can't be restarted properly.
1617 * We might also get here if this happens during HW reset, which is a
1618 * slightly different situation and we need to drop all connections in
1619 * the latter case.
1620 *
1621 * Ask cfg80211 to turn off all interfaces, this will result in more
1622 * warnings but at least we'll then get into a clean stopped state.
1623 */
1624
1625 local->resuming = false;
1626 local->suspended = false;
1627 local->started = false;
1628
1629 /* scheduled scan clearly can't be running any more, but tell
1630 * cfg80211 and clear local state
1631 */
1632 ieee80211_sched_scan_end(local);
1633
1634 list_for_each_entry(sdata, &local->interfaces, list)
1635 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1636
1637 /* Mark channel contexts as not being in the driver any more to avoid
1638 * removing them from the driver during the shutdown process...
1639 */
1640 mutex_lock(&local->chanctx_mtx);
1641 list_for_each_entry(ctx, &local->chanctx_list, list)
1642 ctx->driver_present = false;
1643 mutex_unlock(&local->chanctx_mtx);
1644
1645 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1646}
1647
153a5fc4
SG		 1648static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1649 struct ieee80211_sub_if_data *sdata)
1650{
1651 struct ieee80211_chanctx_conf *conf;
1652 struct ieee80211_chanctx *ctx;
1653
1654 if (!local->use_chanctx)
1655 return;
1656
1657 mutex_lock(&local->chanctx_mtx);
1658 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1659 lockdep_is_held(&local->chanctx_mtx));
1660 if (conf) {
1661 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1662 drv_assign_vif_chanctx(local, sdata, ctx);
1663 }
1664 mutex_unlock(&local->chanctx_mtx);
1665}
1666
f2753ddb
JB		 1667int ieee80211_reconfig(struct ieee80211_local *local)
1668{
1669 struct ieee80211_hw *hw = &local->hw;
1670 struct ieee80211_sub_if_data *sdata;
55de908a 1671 struct ieee80211_chanctx *ctx;
f2753ddb 1672 struct sta_info *sta;
2683d65b 1673 int res, i;
d888130a 1674 bool reconfig_due_to_wowlan = false;
d43c6b6e
DS		 1675 struct ieee80211_sub_if_data *sched_scan_sdata;
1676 bool sched_scan_stopped = false;
d888130a 1677
8f21b0ad 1678#ifdef CONFIG_PM
ceb99fe0
JB		 1679 if (local->suspended)
1680 local->resuming = true;
f2753ddb 1681
eecc4800 1682 if (local->wowlan) {
eecc4800 1683 res = drv_resume(local);
27b3eb9c 1684 local->wowlan = false;
eecc4800
JB		 1685 if (res < 0) {
1686 local->resuming = false;
1687 return res;
1688 }
1689 if (res == 0)
1690 goto wake_up;
1691 WARN_ON(res > 1);
1692 /*
1693 * res is 1, which means the driver requested
1694 * to go through a regular reset on wakeup.
1695 */
d888130a 1696 reconfig_due_to_wowlan = true;
eecc4800
JB		 1697 }
1698#endif
94f9b97b
JB		 1699 /* everything else happens only if HW was up & running */
1700 if (!local->open_count)
1701 goto wake_up;
f2753ddb 1702
94f9b97b
JB		 1703 /*
1704 * Upon resume hardware can sometimes be goofy due to
1705 * various platform / driver / bus issues, so restarting
1706 * the device may at times not work immediately. Propagate
1707 * the error.
1708 */
1709 res = drv_start(local);
1710 if (res) {
f6837ba8
JB		 1711 if (local->suspended)
1712 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1713 else
1714 WARN(1, "Hardware became unavailable during restart.\n");
1715 ieee80211_handle_reconfig_failure(local);
94f9b97b 1716 return res;
f2753ddb
JB		 1717 }
1718
7f281975
YAP		 1719 /* setup fragmentation threshold */
1720 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1721
1722 /* setup RTS threshold */
1723 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1724
1725 /* reset coverage class */
1726 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1727
94f9b97b
JB		 1728 ieee80211_led_radio(local, true);
1729 ieee80211_mod_tpt_led_trig(local,
1730 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1731
f2753ddb 1732 /* add interfaces */
4b6f1dd6
JB		 1733 sdata = rtnl_dereference(local->monitor_sdata);
1734 if (sdata) {
3c3e21e7
JB		 1735 /* in HW restart it exists already */
1736 WARN_ON(local->resuming);
4b6f1dd6
JB		 1737 res = drv_add_interface(local, sdata);
1738 if (WARN_ON(res)) {
0c2bef46 1739 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1740 synchronize_net();
1741 kfree(sdata);
1742 }
1743 }
1744
f2753ddb
JB		 1745 list_for_each_entry(sdata, &local->interfaces, list) {
1746 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1747 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1748 ieee80211_sdata_running(sdata))
7b7eab6f 1749 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1750 }
1751
55de908a 1752 /* add channel contexts */
f0dea9c7
AS		 1753 if (local->use_chanctx) {
1754 mutex_lock(&local->chanctx_mtx);
1755 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1756 if (ctx->replace_state !=
1757 IEEE80211_CHANCTX_REPLACES_OTHER)
1758 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1759 mutex_unlock(&local->chanctx_mtx);
55de908a 1760
7df180f7
ZG		 1761 list_for_each_entry(sdata, &local->interfaces, list) {
1762 if (!ieee80211_sdata_running(sdata))
1763 continue;
1764 ieee80211_assign_chanctx(local, sdata);
1765 }
6352c87f 1766
7df180f7
ZG		 1767 sdata = rtnl_dereference(local->monitor_sdata);
1768 if (sdata && ieee80211_sdata_running(sdata))
1769 ieee80211_assign_chanctx(local, sdata);
1770 }
fe5f2559 1771
f2753ddb 1772 /* add STAs back */
34e89507
JB		 1773 mutex_lock(&local->sta_mtx);
1774 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1775 enum ieee80211_sta_state state;
f09603a2 1776
2e8d397e
AN		 1777 if (!sta->uploaded)
1778 continue;
1779
1780 /* AP-mode stations will be added later */
1781 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1782 continue;
1783
1784 for (state = IEEE80211_STA_NOTEXIST;
1785 state < sta->sta_state; state++)
1786 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1787 state + 1));
f2753ddb 1788 }
34e89507 1789 mutex_unlock(&local->sta_mtx);
f2753ddb 1790
2683d65b 1791 /* reconfigure tx conf */
54bcbc69
JB		 1792 if (hw->queues >= IEEE80211_NUM_ACS) {
1793 list_for_each_entry(sdata, &local->interfaces, list) {
1794 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1795 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1796 !ieee80211_sdata_running(sdata))
1797 continue;
f6f3def3 1798
54bcbc69
JB		 1799 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1800 drv_conf_tx(local, sdata, i,
1801 &sdata->tx_conf[i]);
1802 }
f6f3def3 1803 }
2683d65b 1804
f2753ddb
JB		 1805 /* reconfigure hardware */
1806 ieee80211_hw_config(local, ~0);
1807
f2753ddb 1808 ieee80211_configure_filter(local);
f2753ddb
JB		 1809
1810 /* Finally also reconfigure all the BSS information */
1811 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1812 u32 changed;
1813
9607e6b6 1814 if (!ieee80211_sdata_running(sdata))
f2753ddb 1815 continue;
ac8dd506
JB		 1816
1817 /* common change flags for all interface types */
1818 changed = BSS_CHANGED_ERP_CTS_PROT |
1819 BSS_CHANGED_ERP_PREAMBLE |
1820 BSS_CHANGED_ERP_SLOT |
1821 BSS_CHANGED_HT |
1822 BSS_CHANGED_BASIC_RATES |
1823 BSS_CHANGED_BEACON_INT |
1824 BSS_CHANGED_BSSID |
4ced3f74 1825 BSS_CHANGED_CQM |
55de47f6 1826 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1827 BSS_CHANGED_IDLE |
1828 BSS_CHANGED_TXPOWER;
ac8dd506 1829
f2753ddb
JB		 1830 switch (sdata->vif.type) {
1831 case NL80211_IFTYPE_STATION:
0d392e93 1832 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1833 BSS_CHANGED_ARP_FILTER |
1834 BSS_CHANGED_PS;
c65dd147 1835
989c6505
AB		 1836 /* Re-send beacon info report to the driver */
1837 if (sdata->u.mgd.have_beacon)
1838 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1839
8d61ffa5 1840 sdata_lock(sdata);
ac8dd506 1841 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1842 sdata_unlock(sdata);
ac8dd506 1843 break;
f2753ddb 1844 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1845 changed |= BSS_CHANGED_IBSS;
1846 /* fall through */
f2753ddb 1847 case NL80211_IFTYPE_AP:
339afbf4 1848 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1849
1041638f 1850 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1851 changed |= BSS_CHANGED_AP_PROBE_RESP;
1852
1041638f
JB		 1853 if (rcu_access_pointer(sdata->u.ap.beacon))
1854 drv_start_ap(local, sdata);
1855 }
1856
7827493b 1857 /* fall through */
f2753ddb 1858 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1859 if (sdata->vif.bss_conf.enable_beacon) {
1860 changed |= BSS_CHANGED_BEACON |
1861 BSS_CHANGED_BEACON_ENABLED;
1862 ieee80211_bss_info_change_notify(sdata, changed);
1863 }
f2753ddb
JB		 1864 break;
1865 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1866 case NL80211_IFTYPE_AP_VLAN:
1867 case NL80211_IFTYPE_MONITOR:
98104fde 1868 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1869 /* nothing to do */
f142c6b9 1870 break;
f2753ddb 1871 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1872 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1873 case NL80211_IFTYPE_P2P_CLIENT:
1874 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1875 WARN_ON(1);
1876 break;
1877 }
1878 }
1879
8e1b23b9
ES		 1880 ieee80211_recalc_ps(local, -1);
1881
6e1b1b24
EP		 1882 /*
1883 * The sta might be in psm against the ap (e.g. because
1884 * this was the state before a hw restart), so we
1885 * explicitly send a null packet in order to make sure
1886 * it'll sync against the ap (and get out of psm).
1887 */
1888 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1889 list_for_each_entry(sdata, &local->interfaces, list) {
1890 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1891 continue;
20f544ee
JB		 1892 if (!sdata->u.mgd.associated)
1893 continue;
6e1b1b24
EP		 1894
1895 ieee80211_send_nullfunc(local, sdata, 0);
1896 }
1897 }
1898
2e8d397e
AN		 1899 /* APs are now beaconing, add back stations */
1900 mutex_lock(&local->sta_mtx);
1901 list_for_each_entry(sta, &local->sta_list, list) {
1902 enum ieee80211_sta_state state;
1903
1904 if (!sta->uploaded)
1905 continue;
1906
1907 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1908 continue;
1909
1910 for (state = IEEE80211_STA_NOTEXIST;
1911 state < sta->sta_state; state++)
1912 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1913 state + 1));
1914 }
1915 mutex_unlock(&local->sta_mtx);
1916
7b21aea0
ES		 1917 /* add back keys */
1918 list_for_each_entry(sdata, &local->interfaces, list)
1919 if (ieee80211_sdata_running(sdata))
1920 ieee80211_enable_keys(sdata);
1921
c6209488 1922 wake_up:
04800ada
AN		 1923 local->in_reconfig = false;
1924 barrier();
1925
3c3e21e7
JB		 1926 if (local->monitors == local->open_count && local->monitors > 0)
1927 ieee80211_add_virtual_monitor(local);
1928
2a419056
JB		 1929 /*
1930 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1931 * sessions can be established after a resume.
1932 *
1933 * Also tear down aggregation sessions since reconfiguring
1934 * them in a hardware restart scenario is not easily done
1935 * right now, and the hardware will have lost information
1936 * about the sessions, but we and the AP still think they
1937 * are active. This is really a workaround though.
1938 */
74e2bd1f 1939 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 1940 mutex_lock(&local->sta_mtx);
1941
1942 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 1943 ieee80211_sta_tear_down_BA_sessions(
1944 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 1945 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 1946 }
2a419056
JB		 1947
1948 mutex_unlock(&local->sta_mtx);
74e2bd1f 1949 }
74e2bd1f 1950
445ea4e8 1951 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1952 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1953 false);
f2753ddb 1954
32769814
AN		 1955 /*
1956 * Reconfigure sched scan if it was interrupted by FW restart or
1957 * suspend.
1958 */
1959 mutex_lock(&local->mtx);
1960 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1961 lockdep_is_held(&local->mtx));
1962 if (sched_scan_sdata && local->sched_scan_req)
1963 /*
1964 * Sched scan stopped, but we don't want to report it. Instead,
1965 * we're trying to reschedule.
1966 */
1967 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1968 local->sched_scan_req))
1969 sched_scan_stopped = true;
1970 mutex_unlock(&local->mtx);
1971
1972 if (sched_scan_stopped)
e669ba2d 1973 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 1974
5bb644a0
JB		 1975 /*
1976 * If this is for hw restart things are still running.
1977 * We may want to change that later, however.
1978 */
8f21b0ad 1979 if (!local->suspended || reconfig_due_to_wowlan)
9214ad7f 1980 drv_restart_complete(local);
8f21b0ad
JB		 1981
1982 if (!local->suspended)
5bb644a0
JB		 1983 return 0;
1984
1985#ifdef CONFIG_PM
ceb99fe0 1986 /* first set suspended false, then resuming */
5bb644a0 1987 local->suspended = false;
ceb99fe0
JB		 1988 mb();
1989 local->resuming = false;
5bb644a0 1990
b8360ab8
JB		 1991 list_for_each_entry(sdata, &local->interfaces, list) {
1992 if (!ieee80211_sdata_running(sdata))
1993 continue;
1994 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1995 ieee80211_sta_restart(sdata);
1996 }
1997
26d59535 1998 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 1999#else
2000 WARN_ON(1);
2001#endif
d43c6b6e 2002
f2753ddb
JB		 2003 return 0;
2004}
42935eca 2005
95acac61
JB		 2006void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2007{
2008 struct ieee80211_sub_if_data *sdata;
2009 struct ieee80211_local *local;
2010 struct ieee80211_key *key;
2011
2012 if (WARN_ON(!vif))
2013 return;
2014
2015 sdata = vif_to_sdata(vif);
2016 local = sdata->local;
2017
2018 if (WARN_ON(!local->resuming))
2019 return;
2020
2021 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2022 return;
2023
2024 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2025
2026 mutex_lock(&local->key_mtx);
2027 list_for_each_entry(key, &sdata->key_list, list)
2028 key->flags |= KEY_FLAG_TAINTED;
2029 mutex_unlock(&local->key_mtx);
2030}
2031EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2032
04ecd257 2033void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2034{
04ecd257
JB		 2035 struct ieee80211_local *local = sdata->local;
2036 struct ieee80211_chanctx_conf *chanctx_conf;
2037 struct ieee80211_chanctx *chanctx;
025e6be2 2038
04ecd257 2039 mutex_lock(&local->chanctx_mtx);
0f78231b 2040
04ecd257
JB		 2041 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2042 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2043
04ecd257 2044 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2045 goto unlock;
0f78231b 2046
04ecd257
JB		 2047 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2048 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2049 unlock:
04ecd257 2050 mutex_unlock(&local->chanctx_mtx);
0f78231b 2051}
8e664fb3 2052
21f659bf
EP		 2053void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2054{
2055 struct ieee80211_local *local = sdata->local;
2056 struct ieee80211_chanctx_conf *chanctx_conf;
2057 struct ieee80211_chanctx *chanctx;
2058
2059 mutex_lock(&local->chanctx_mtx);
2060
2061 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2062 lockdep_is_held(&local->chanctx_mtx));
2063
2064 if (WARN_ON_ONCE(!chanctx_conf))
2065 goto unlock;
2066
2067 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2068 ieee80211_recalc_chanctx_min_def(local, chanctx);
2069 unlock:
2070 mutex_unlock(&local->chanctx_mtx);
2071}
2072
8e664fb3
JB		 2073static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2074{
2075 int i;
2076
2077 for (i = 0; i < n_ids; i++)
2078 if (ids[i] == id)
2079 return true;
2080 return false;
2081}
2082
8e664fb3
JB		 2083size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2084 const u8 *ids, int n_ids, size_t offset)
2085{
2086 size_t pos = offset;
2087
2088 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
2089 pos += 2 + ies[pos + 1];
2090
2091 return pos;
2092}
a7f3a768 2093EXPORT_SYMBOL(ieee80211_ie_split);
8e664fb3
JB		 2094
2095size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2096{
2097 size_t pos = offset;
2098
2099 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2100 pos += 2 + ies[pos + 1];
2101
2102 return pos;
2103}
615f7b9b
MV		 2104
2105static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2106 int rssi_min_thold,
2107 int rssi_max_thold)
2108{
2109 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2110
2111 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2112 return;
2113
2114 /*
2115 * Scale up threshold values before storing it, as the RSSI averaging
2116 * algorithm uses a scaled up value as well. Change this scaling
2117 * factor if the RSSI averaging algorithm changes.
2118 */
2119 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2120 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2121}
2122
2123void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2124 int rssi_min_thold,
2125 int rssi_max_thold)
2126{
2127 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2128
2129 WARN_ON(rssi_min_thold == rssi_max_thold ||
2130 rssi_min_thold > rssi_max_thold);
2131
2132 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2133 rssi_max_thold);
2134}
2135EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2136
2137void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2138{
2139 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2140
2141 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2142}
2143EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2144
ef96a842 2145u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2146 u16 cap)
2147{
2148 __le16 tmp;
2149
2150 *pos++ = WLAN_EID_HT_CAPABILITY;
2151 *pos++ = sizeof(struct ieee80211_ht_cap);
2152 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2153
2154 /* capability flags */
2155 tmp = cpu_to_le16(cap);
2156 memcpy(pos, &tmp, sizeof(u16));
2157 pos += sizeof(u16);
2158
2159 /* AMPDU parameters */
ef96a842
BG		 2160 *pos++ = ht_cap->ampdu_factor |
2161 (ht_cap->ampdu_density <<
42e7aa77
AS		 2162 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2163
2164 /* MCS set */
ef96a842
BG		 2165 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2166 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2167
2168 /* extended capabilities */
2169 pos += sizeof(__le16);
2170
2171 /* BF capabilities */
2172 pos += sizeof(__le32);
2173
2174 /* antenna selection */
2175 pos += sizeof(u8);
2176
2177 return pos;
2178}
2179
ba0afa2f 2180u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2181 u32 cap)
ba0afa2f
MP		 2182{
2183 __le32 tmp;
2184
2185 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2186 *pos++ = sizeof(struct ieee80211_vht_cap);
2187 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2188
2189 /* capability flags */
2190 tmp = cpu_to_le32(cap);
2191 memcpy(pos, &tmp, sizeof(u32));
2192 pos += sizeof(u32);
2193
2194 /* VHT MCS set */
2195 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2196 pos += sizeof(vht_cap->vht_mcs);
2197
2198 return pos;
2199}
2200
074d46d1 2201u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2202 const struct cfg80211_chan_def *chandef,
431e3154 2203 u16 prot_mode)
42e7aa77 2204{
074d46d1 2205 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2206 /* Build HT Information */
074d46d1
JB		 2207 *pos++ = WLAN_EID_HT_OPERATION;
2208 *pos++ = sizeof(struct ieee80211_ht_operation);
2209 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2210 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2211 chandef->chan->center_freq);
2212 switch (chandef->width) {
2213 case NL80211_CHAN_WIDTH_160:
2214 case NL80211_CHAN_WIDTH_80P80:
2215 case NL80211_CHAN_WIDTH_80:
2216 case NL80211_CHAN_WIDTH_40:
2217 if (chandef->center_freq1 > chandef->chan->center_freq)
2218 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2219 else
2220 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2221 break;
42e7aa77 2222 default:
074d46d1 2223 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2224 break;
2225 }
aee286c2 2226 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2227 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2228 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2229 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2230
431e3154 2231 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2232 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2233
2234 /* It seems that Basic MCS set and Supported MCS set
2235 are identical for the first 10 bytes */
074d46d1
JB		 2236 memset(&ht_oper->basic_set, 0, 16);
2237 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2238
074d46d1 2239 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2240}
2241
4bf88530 2242void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2243 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2244 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2245{
2246 enum nl80211_channel_type channel_type;
2247
4bf88530
JB		 2248 if (!ht_oper) {
2249 cfg80211_chandef_create(chandef, control_chan,
2250 NL80211_CHAN_NO_HT);
2251 return;
2252 }
42e7aa77 2253
074d46d1 2254 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2255 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2256 channel_type = NL80211_CHAN_HT20;
2257 break;
2258 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2259 channel_type = NL80211_CHAN_HT40PLUS;
2260 break;
2261 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2262 channel_type = NL80211_CHAN_HT40MINUS;
2263 break;
2264 default:
2265 channel_type = NL80211_CHAN_NO_HT;
2266 }
2267
4bf88530 2268 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2269}
2270
2103dec1
SW		 2271int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2272 const struct ieee80211_supported_band *sband,
2273 const u8 *srates, int srates_len, u32 *rates)
2274{
2275 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2276 int shift = ieee80211_chandef_get_shift(chandef);
2277 struct ieee80211_rate *br;
2278 int brate, rate, i, j, count = 0;
2279
2280 *rates = 0;
2281
2282 for (i = 0; i < srates_len; i++) {
2283 rate = srates[i] & 0x7f;
2284
2285 for (j = 0; j < sband->n_bitrates; j++) {
2286 br = &sband->bitrates[j];
2287 if ((rate_flags & br->flags) != rate_flags)
2288 continue;
2289
2290 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2291 if (brate == rate) {
2292 *rates |= BIT(j);
2293 count++;
2294 break;
2295 }
2296 }
2297 }
2298 return count;
2299}
2300
fc8a7321 2301int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2302 struct sk_buff *skb, bool need_basic,
2303 enum ieee80211_band band)
768db343 2304{
768db343
AN		 2305 struct ieee80211_local *local = sdata->local;
2306 struct ieee80211_supported_band *sband;
2103dec1 2307 int rate, shift;
768db343 2308 u8 i, rates, *pos;
fc8a7321 2309 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2310 u32 rate_flags;
768db343 2311
2103dec1
SW		 2312 shift = ieee80211_vif_get_shift(&sdata->vif);
2313 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2314 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2315 rates = 0;
2316 for (i = 0; i < sband->n_bitrates; i++) {
2317 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2318 continue;
2319 rates++;
2320 }
768db343
AN		 2321 if (rates > 8)
2322 rates = 8;
2323
2324 if (skb_tailroom(skb) < rates + 2)
2325 return -ENOMEM;
2326
2327 pos = skb_put(skb, rates + 2);
2328 *pos++ = WLAN_EID_SUPP_RATES;
2329 *pos++ = rates;
2330 for (i = 0; i < rates; i++) {
657c3e0c 2331 u8 basic = 0;
2103dec1
SW		 2332 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2333 continue;
2334
657c3e0c
AN		 2335 if (need_basic && basic_rates & BIT(i))
2336 basic = 0x80;
768db343 2337 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2338 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2339 5 * (1 << shift));
2340 *pos++ = basic | (u8) rate;
768db343
AN		 2341 }
2342
2343 return 0;
2344}
2345
fc8a7321 2346int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2347 struct sk_buff *skb, bool need_basic,
2348 enum ieee80211_band band)
768db343 2349{
768db343
AN		 2350 struct ieee80211_local *local = sdata->local;
2351 struct ieee80211_supported_band *sband;
cc63ec76 2352 int rate, shift;
768db343 2353 u8 i, exrates, *pos;
fc8a7321 2354 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2355 u32 rate_flags;
2356
2357 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2358 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2359
6b77863b 2360 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2361 exrates = 0;
2362 for (i = 0; i < sband->n_bitrates; i++) {
2363 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2364 continue;
2365 exrates++;
2366 }
2367
768db343
AN		 2368 if (exrates > 8)
2369 exrates -= 8;
2370 else
2371 exrates = 0;
2372
2373 if (skb_tailroom(skb) < exrates + 2)
2374 return -ENOMEM;
2375
2376 if (exrates) {
2377 pos = skb_put(skb, exrates + 2);
2378 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2379 *pos++ = exrates;
2380 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2381 u8 basic = 0;
2103dec1
SW		 2382 if ((rate_flags & sband->bitrates[i].flags)
2383 != rate_flags)
2384 continue;
657c3e0c
AN		 2385 if (need_basic && basic_rates & BIT(i))
2386 basic = 0x80;
2103dec1
SW		 2387 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2388 5 * (1 << shift));
2389 *pos++ = basic | (u8) rate;
768db343
AN		 2390 }
2391 }
2392 return 0;
2393}
1dae27f8
WYG		 2394
2395int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2396{
2397 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2398 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2399
be6bcabc
WYG		 2400 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2401 /* non-managed type inferfaces */
2402 return 0;
2403 }
3a7bba64 2404 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2405}
0d8a0a17 2406EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2407
2408u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2409{
2410 if (!mcs)
2411 return 1;
2412
2413 /* TODO: consider rx_highest */
2414
2415 if (mcs->rx_mask[3])
2416 return 4;
2417 if (mcs->rx_mask[2])
2418 return 3;
2419 if (mcs->rx_mask[1])
2420 return 2;
2421 return 1;
2422}
f4bda337
TP		 2423
2424/**
2425 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2426 * @local: mac80211 hw info struct
2427 * @status: RX status
2428 * @mpdu_len: total MPDU length (including FCS)
2429 * @mpdu_offset: offset into MPDU to calculate timestamp at
2430 *
2431 * This function calculates the RX timestamp at the given MPDU offset, taking
2432 * into account what the RX timestamp was. An offset of 0 will just normalize
2433 * the timestamp to TSF at beginning of MPDU reception.
2434 */
2435u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2436 struct ieee80211_rx_status *status,
2437 unsigned int mpdu_len,
2438 unsigned int mpdu_offset)
2439{
2440 u64 ts = status->mactime;
2441 struct rate_info ri;
2442 u16 rate;
2443
2444 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2445 return 0;
2446
2447 memset(&ri, 0, sizeof(ri));
2448
2449 /* Fill cfg80211 rate info */
2450 if (status->flag & RX_FLAG_HT) {
2451 ri.mcs = status->rate_idx;
2452 ri.flags |= RATE_INFO_FLAGS_MCS;
2453 if (status->flag & RX_FLAG_40MHZ)
2454 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2455 if (status->flag & RX_FLAG_SHORT_GI)
2456 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2457 } else if (status->flag & RX_FLAG_VHT) {
2458 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2459 ri.mcs = status->rate_idx;
2460 ri.nss = status->vht_nss;
2461 if (status->flag & RX_FLAG_40MHZ)
2462 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
1b8d242a 2463 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
5614618e 2464 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
1b8d242a 2465 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
5614618e 2466 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
1b8d242a 2467 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
5614618e
JB		 2468 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2469 if (status->flag & RX_FLAG_SHORT_GI)
2470 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2471 } else {
2472 struct ieee80211_supported_band *sband;
2103dec1
SW		 2473 int shift = 0;
2474 int bitrate;
2475
2476 if (status->flag & RX_FLAG_10MHZ)
2477 shift = 1;
2478 if (status->flag & RX_FLAG_5MHZ)
2479 shift = 2;
f4bda337
TP		 2480
2481 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2482 bitrate = sband->bitrates[status->rate_idx].bitrate;
2483 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2484 }
2485
2486 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2487 if (WARN_ONCE(!rate,
2488 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2489 status->flag, status->rate_idx, status->vht_nss))
2490 return 0;
f4bda337
TP		 2491
2492 /* rewind from end of MPDU */
2493 if (status->flag & RX_FLAG_MACTIME_END)
2494 ts -= mpdu_len * 8 * 10 / rate;
2495
2496 ts += mpdu_offset * 8 * 10 / rate;
2497
2498 return ts;
2499}
164eb02d
SW		 2500
2501void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2502{
2503 struct ieee80211_sub_if_data *sdata;
d2859df5 2504 struct cfg80211_chan_def chandef;
164eb02d 2505
34a3740d 2506 mutex_lock(&local->mtx);
164eb02d
SW		 2507 mutex_lock(&local->iflist_mtx);
2508 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2509 /* it might be waiting for the local->mtx, but then
2510 * by the time it gets it, sdata->wdev.cac_started
2511 * will no longer be true
2512 */
2513 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2514
2515 if (sdata->wdev.cac_started) {
d2859df5 2516 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2517 ieee80211_vif_release_channel(sdata);
2518 cfg80211_cac_event(sdata->dev,
d2859df5 2519 &chandef,
164eb02d
SW		 2520 NL80211_RADAR_CAC_ABORTED,
2521 GFP_KERNEL);
2522 }
2523 }
2524 mutex_unlock(&local->iflist_mtx);
34a3740d 2525 mutex_unlock(&local->mtx);
164eb02d
SW		 2526}
2527
2528void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2529{
2530 struct ieee80211_local *local =
2531 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2532 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2533 struct ieee80211_chanctx *ctx;
2534 int num_chanctx = 0;
2535
2536 mutex_lock(&local->chanctx_mtx);
2537 list_for_each_entry(ctx, &local->chanctx_list, list) {
2538 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2539 continue;
2540
2541 num_chanctx++;
2542 chandef = ctx->conf.def;
2543 }
2544 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2545
2546 ieee80211_dfs_cac_cancel(local);
2547
486cf4c0
MK		 2548 if (num_chanctx > 1)
2549 /* XXX: multi-channel is not supported yet */
164eb02d 2550 WARN_ON(1);
84a3d1c9 2551 else
164eb02d 2552 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2553}
2554
2555void ieee80211_radar_detected(struct ieee80211_hw *hw)
2556{
2557 struct ieee80211_local *local = hw_to_local(hw);
2558
2559 trace_api_radar_detected(local);
2560
2561 ieee80211_queue_work(hw, &local->radar_detected_work);
2562}
2563EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2564
2565u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2566{
2567 u32 ret;
2568 int tmp;
2569
2570 switch (c->width) {
2571 case NL80211_CHAN_WIDTH_20:
2572 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2573 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2574 break;
2575 case NL80211_CHAN_WIDTH_40:
2576 c->width = NL80211_CHAN_WIDTH_20;
2577 c->center_freq1 = c->chan->center_freq;
2578 ret = IEEE80211_STA_DISABLE_40MHZ |
2579 IEEE80211_STA_DISABLE_VHT;
2580 break;
2581 case NL80211_CHAN_WIDTH_80:
2582 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2583 /* n_P40 */
2584 tmp /= 2;
2585 /* freq_P40 */
2586 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2587 c->width = NL80211_CHAN_WIDTH_40;
2588 ret = IEEE80211_STA_DISABLE_VHT;
2589 break;
2590 case NL80211_CHAN_WIDTH_80P80:
2591 c->center_freq2 = 0;
2592 c->width = NL80211_CHAN_WIDTH_80;
2593 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2594 IEEE80211_STA_DISABLE_160MHZ;
2595 break;
2596 case NL80211_CHAN_WIDTH_160:
2597 /* n_P20 */
2598 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2599 /* n_P80 */
2600 tmp /= 4;
2601 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2602 c->width = NL80211_CHAN_WIDTH_80;
2603 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2604 IEEE80211_STA_DISABLE_160MHZ;
2605 break;
2606 default:
2607 case NL80211_CHAN_WIDTH_20_NOHT:
2608 WARN_ON_ONCE(1);
2609 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2610 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2611 break;
2612 case NL80211_CHAN_WIDTH_5:
2613 case NL80211_CHAN_WIDTH_10:
2614 WARN_ON_ONCE(1);
2615 /* keep c->width */
2616 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2617 break;
2618 }
2619
2620 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2621
2622 return ret;
2623}
687da132
EG		 2624
2625/*
2626 * Returns true if smps_mode_new is strictly more restrictive than
2627 * smps_mode_old.
2628 */
2629bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2630 enum ieee80211_smps_mode smps_mode_new)
2631{
2632 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2633 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2634 return false;
2635
2636 switch (smps_mode_old) {
2637 case IEEE80211_SMPS_STATIC:
2638 return false;
2639 case IEEE80211_SMPS_DYNAMIC:
2640 return smps_mode_new == IEEE80211_SMPS_STATIC;
2641 case IEEE80211_SMPS_OFF:
2642 return smps_mode_new != IEEE80211_SMPS_OFF;
2643 default:
2644 WARN_ON(1);
2645 }
2646
2647 return false;
2648}
c6da674a
CYY		 2649
2650int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2651 struct cfg80211_csa_settings *csa_settings)
2652{
2653 struct sk_buff *skb;
2654 struct ieee80211_mgmt *mgmt;
2655 struct ieee80211_local *local = sdata->local;
2656 int freq;
2657 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2658 sizeof(mgmt->u.action.u.chan_switch);
2659 u8 *pos;
2660
2661 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2662 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2663 return -EOPNOTSUPP;
2664
2665 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2666 5 + /* channel switch announcement element */
2667 3 + /* secondary channel offset element */
2668 8); /* mesh channel switch parameters element */
2669 if (!skb)
2670 return -ENOMEM;
2671
2672 skb_reserve(skb, local->tx_headroom);
2673 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2674 memset(mgmt, 0, hdr_len);
2675 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2676 IEEE80211_STYPE_ACTION);
2677
2678 eth_broadcast_addr(mgmt->da);
2679 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2680 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2681 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2682 } else {
2683 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2684 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2685 }
2686 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2687 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2688 pos = skb_put(skb, 5);
2689 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2690 *pos++ = 3; /* IE length */
2691 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2692 freq = csa_settings->chandef.chan->center_freq;
2693 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2694 *pos++ = csa_settings->count; /* count */
2695
2696 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2697 enum nl80211_channel_type ch_type;
2698
2699 skb_put(skb, 3);
2700 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2701 *pos++ = 1; /* IE length */
2702 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2703 if (ch_type == NL80211_CHAN_HT40PLUS)
2704 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2705 else
2706 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2707 }
2708
2709 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2710 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2711
2712 skb_put(skb, 8);
2713 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2714 *pos++ = 6; /* IE length */
2715 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2716 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2717 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2718 *pos++ |= csa_settings->block_tx ?
2719 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2720 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2721 pos += 2;
ca91dc97 2722 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2723 pos += 2;
c6da674a
CYY		 2724 }
2725
2726 ieee80211_tx_skb(sdata, skb);
2727 return 0;
2728}
2475b1cc
MS		 2729
2730bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2731{
2732 return !(cs == NULL || cs->cipher == 0 ||
2733 cs->hdr_len < cs->pn_len + cs->pn_off ||
2734 cs->hdr_len <= cs->key_idx_off ||
2735 cs->key_idx_shift > 7 ||
2736 cs->key_idx_mask == 0);
2737}
2738
2739bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2740{
2741 int i;
2742
2743 /* Ensure we have enough iftype bitmap space for all iftype values */
2744 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2745
2746 for (i = 0; i < n; i++)
2747 if (!ieee80211_cs_valid(&cs[i]))
2748 return false;
2749
2750 return true;
2751}
2752
2753const struct ieee80211_cipher_scheme *
2754ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2755 enum nl80211_iftype iftype)
2756{
2757 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2758 int n = local->hw.n_cipher_schemes;
2759 int i;
2760 const struct ieee80211_cipher_scheme *cs = NULL;
2761
2762 for (i = 0; i < n; i++) {
2763 if (l[i].cipher == cipher) {
2764 cs = &l[i];
2765 break;
2766 }
2767 }
2768
2769 if (!cs || !(cs->iftype & BIT(iftype)))
2770 return NULL;
2771
2772 return cs;
2773}
2774
2775int ieee80211_cs_headroom(struct ieee80211_local *local,
2776 struct cfg80211_crypto_settings *crypto,
2777 enum nl80211_iftype iftype)
2778{
2779 const struct ieee80211_cipher_scheme *cs;
2780 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2781 int i;
2782
2783 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2784 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2785 iftype);
2786
2787 if (cs && headroom < cs->hdr_len)
2788 headroom = cs->hdr_len;
2789 }
2790
2791 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2792 if (cs && headroom < cs->hdr_len)
2793 headroom = cs->hdr_len;
2794
2795 return headroom;
2796}
a7022e65
FF		 2797
2798static bool
2799ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2800{
2801 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2802 int skip;
2803
2804 if (end > 0)
2805 return false;
2806
2807 /* End time is in the past, check for repetitions */
2808 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2809 if (data->count[i] < 255) {
2810 if (data->count[i] <= skip) {
2811 data->count[i] = 0;
2812 return false;
2813 }
2814
2815 data->count[i] -= skip;
2816 }
2817
2818 data->desc[i].start += skip * data->desc[i].interval;
2819
2820 return true;
2821}
2822
2823static bool
2824ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2825 s32 *offset)
2826{
2827 bool ret = false;
2828 int i;
2829
2830 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2831 s32 cur;
2832
2833 if (!data->count[i])
2834 continue;
2835
2836 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2837 ret = true;
2838
2839 cur = data->desc[i].start - tsf;
2840 if (cur > *offset)
2841 continue;
2842
2843 cur = data->desc[i].start + data->desc[i].duration - tsf;
2844 if (cur > *offset)
2845 *offset = cur;
2846 }
2847
2848 return ret;
2849}
2850
2851static u32
2852ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2853{
2854 s32 offset = 0;
2855 int tries = 0;
2856 /*
2857 * arbitrary limit, used to avoid infinite loops when combined NoA
2858 * descriptors cover the full time period.
2859 */
2860 int max_tries = 5;
2861
2862 ieee80211_extend_absent_time(data, tsf, &offset);
2863 do {
2864 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2865 break;
2866
2867 tries++;
2868 } while (tries < max_tries);
2869
2870 return offset;
2871}
2872
2873void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2874{
2875 u32 next_offset = BIT(31) - 1;
2876 int i;
2877
2878 data->absent = 0;
2879 data->has_next_tsf = false;
2880 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2881 s32 start;
2882
2883 if (!data->count[i])
2884 continue;
2885
2886 ieee80211_extend_noa_desc(data, tsf, i);
2887 start = data->desc[i].start - tsf;
2888 if (start <= 0)
2889 data->absent |= BIT(i);
2890
2891 if (next_offset > start)
2892 next_offset = start;
2893
2894 data->has_next_tsf = true;
2895 }
2896
2897 if (data->absent)
2898 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2899
2900 data->next_tsf = tsf + next_offset;
2901}
2902EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2903
2904int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2905 struct ieee80211_noa_data *data, u32 tsf)
2906{
2907 int ret = 0;
2908 int i;
2909
2910 memset(data, 0, sizeof(*data));
2911
2912 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2913 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2914
2915 if (!desc->count || !desc->duration)
2916 continue;
2917
2918 data->count[i] = desc->count;
2919 data->desc[i].start = le32_to_cpu(desc->start_time);
2920 data->desc[i].duration = le32_to_cpu(desc->duration);
2921 data->desc[i].interval = le32_to_cpu(desc->interval);
2922
2923 if (data->count[i] > 1 &&
2924 data->desc[i].interval < data->desc[i].duration)
2925 continue;
2926
2927 ieee80211_extend_noa_desc(data, tsf, i);
2928 ret++;
2929 }
2930
2931 if (ret)
2932 ieee80211_update_p2p_noa(data, tsf);
2933
2934 return ret;
2935}
2936EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 2937
2938void ieee80211_recalc_dtim(struct ieee80211_local *local,
2939 struct ieee80211_sub_if_data *sdata)
2940{
2941 u64 tsf = drv_get_tsf(local, sdata);
2942 u64 dtim_count = 0;
2943 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2944 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2945 struct ps_data *ps;
2946 u8 bcns_from_dtim;
2947
2948 if (tsf == -1ULL || !beacon_int || !dtim_period)
2949 return;
2950
2951 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2952 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2953 if (!sdata->bss)
2954 return;
2955
2956 ps = &sdata->bss->ps;
2957 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2958 ps = &sdata->u.mesh.ps;
2959 } else {
2960 return;
2961 }
2962
2963 /*
2964 * actually finds last dtim_count, mac80211 will update in
2965 * __beacon_add_tim().
2966 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2967 */
2968 do_div(tsf, beacon_int);
2969 bcns_from_dtim = do_div(tsf, dtim_period);
2970 /* just had a DTIM */
2971 if (!bcns_from_dtim)
2972 dtim_count = 0;
2973 else
2974 dtim_count = dtim_period - bcns_from_dtim;
2975
2976 ps->dtim_count = dtim_count;
2977}
73de86a3 2978
71e6195e
MK		 2979static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
2980 struct ieee80211_chanctx *ctx)
2981{
2982 struct ieee80211_sub_if_data *sdata;
2983 u8 radar_detect = 0;
2984
2985 lockdep_assert_held(&local->chanctx_mtx);
2986
2987 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
2988 return 0;
2989
2990 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
2991 if (sdata->reserved_radar_required)
2992 radar_detect |= BIT(sdata->reserved_chandef.width);
2993
2994 /*
2995 * An in-place reservation context should not have any assigned vifs
2996 * until it replaces the other context.
2997 */
2998 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
2999 !list_empty(&ctx->assigned_vifs));
3000
3001 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3002 if (sdata->radar_required)
3003 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3004
3005 return radar_detect;
3006}
3007
73de86a3
LC		 3008int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3009 const struct cfg80211_chan_def *chandef,
3010 enum ieee80211_chanctx_mode chanmode,
3011 u8 radar_detect)
3012{
3013 struct ieee80211_local *local = sdata->local;
3014 struct ieee80211_sub_if_data *sdata_iter;
3015 enum nl80211_iftype iftype = sdata->wdev.iftype;
3016 int num[NUM_NL80211_IFTYPES];
3017 struct ieee80211_chanctx *ctx;
b6a55015 3018 int num_different_channels = 0;
73de86a3
LC		 3019 int total = 1;
3020
3021 lockdep_assert_held(&local->chanctx_mtx);
3022
3023 if (WARN_ON(hweight32(radar_detect) > 1))
3024 return -EINVAL;
3025
b6a55015
LC		 3026 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3027 !chandef->chan))
73de86a3
LC		 3028 return -EINVAL;
3029
b6a55015
LC		 3030 if (chandef)
3031 num_different_channels = 1;
3032
73de86a3
LC		 3033 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3034 return -EINVAL;
3035
3036 /* Always allow software iftypes */
3037 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3038 if (radar_detect)
3039 return -EINVAL;
3040 return 0;
3041 }
3042
3043 memset(num, 0, sizeof(num));
3044
3045 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3046 num[iftype] = 1;
3047
3048 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3049 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3050 continue;
71e6195e 3051 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3052 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3053 num_different_channels++;
3054 continue;
3055 }
b6a55015 3056 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3057 cfg80211_chandef_compatible(chandef,
3058 &ctx->conf.def))
3059 continue;
3060 num_different_channels++;
3061 }
3062
3063 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3064 struct wireless_dev *wdev_iter;
3065
3066 wdev_iter = &sdata_iter->wdev;
3067
3068 if (sdata_iter == sdata ||
3069 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3070 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3071 continue;
3072
3073 num[wdev_iter->iftype]++;
3074 total++;
3075 }
3076
3077 if (total == 1 && !radar_detect)
3078 return 0;
3079
3080 return cfg80211_check_combinations(local->hw.wiphy,
3081 num_different_channels,
3082 radar_detect, num);
3083}
6fa001bc
MK		 3084
3085static void
3086ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3087 void *data)
3088{
3089 u32 *max_num_different_channels = data;
3090
3091 *max_num_different_channels = max(*max_num_different_channels,
3092 c->num_different_channels);
3093}
3094
3095int ieee80211_max_num_channels(struct ieee80211_local *local)
3096{
3097 struct ieee80211_sub_if_data *sdata;
3098 int num[NUM_NL80211_IFTYPES] = {};
3099 struct ieee80211_chanctx *ctx;
3100 int num_different_channels = 0;
3101 u8 radar_detect = 0;
3102 u32 max_num_different_channels = 1;
3103 int err;
3104
3105 lockdep_assert_held(&local->chanctx_mtx);
3106
3107 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3108 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3109 continue;
3110
6fa001bc
MK		 3111 num_different_channels++;
3112
71e6195e 3113 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3114 }
3115
3116 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3117 num[sdata->wdev.iftype]++;
3118
3119 err = cfg80211_iter_combinations(local->hw.wiphy,
3120 num_different_channels, radar_detect,
3121 num, ieee80211_iter_max_chans,
3122 &max_num_different_channels);
3123 if (err < 0)
3124 return err;
3125
3126 return max_num_different_channels;
3127}
40b861a0
AN		 3128
3129u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3130{
3131 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3132 *buf++ = 7; /* len */
3133 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3134 *buf++ = 0x50;
3135 *buf++ = 0xf2;
3136 *buf++ = 2; /* WME */
3137 *buf++ = 0; /* WME info */
3138 *buf++ = 1; /* WME ver */
3139 *buf++ = qosinfo; /* U-APSD no in use */
3140
3141 return buf;
3142}
Linux 6.x block layer and io_uring tree(s)