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mac80211: allow the driver to advertise A-MSDU within A-MPDU Rx support
[deliverable/linux.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
5cf121c3 50void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
c2d1560a 51{
252b86c4 52 struct sk_buff *skb;
2de8e0d9
JB		 53 struct ieee80211_hdr *hdr;
54
252b86c4 55 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9
JB		 56 hdr = (struct ieee80211_hdr *) skb->data;
57 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
252b86c4 58 }
c2d1560a
JB		 59}
60
4ee73f33 61int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
438b61b7
SW		 62 int rate, int erp, int short_preamble,
63 int shift)
c2d1560a
JB		 64{
65 int dur;
66
67 /* calculate duration (in microseconds, rounded up to next higher
68 * integer if it includes a fractional microsecond) to send frame of
69 * len bytes (does not include FCS) at the given rate. Duration will
70 * also include SIFS.
71 *
72 * rate is in 100 kbps, so divident is multiplied by 10 in the
73 * DIV_ROUND_UP() operations.
438b61b7
SW		 74 *
75 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
76 * is assumed to be 0 otherwise.
c2d1560a
JB		 77 */
78
4ee73f33 79 if (band == IEEE80211_BAND_5GHZ || erp) {
c2d1560a
JB		 80 /*
81 * OFDM:
82 *
83 * N_DBPS = DATARATE x 4
84 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
85 * (16 = SIGNAL time, 6 = tail bits)
86 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
87 *
88 * T_SYM = 4 usec
438b61b7 89 * 802.11a - 18.5.2: aSIFSTime = 16 usec
c2d1560a
JB		 90 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
91 * signal ext = 6 usec
92 */
c2d1560a 93 dur = 16; /* SIFS + signal ext */
438b61b7
SW		 94 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
95 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
438b61b7
SW		 96
97 /* IEEE 802.11-2012 18.3.2.4: all values above are:
98 * * times 4 for 5 MHz
99 * * times 2 for 10 MHz
100 */
101 dur *= 1 << shift;
2103dec1
SW		 102
103 /* rates should already consider the channel bandwidth,
104 * don't apply divisor again.
105 */
106 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
107 4 * rate); /* T_SYM x N_SYM */
c2d1560a
JB		 108 } else {
109 /*
110 * 802.11b or 802.11g with 802.11b compatibility:
111 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
112 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
113 *
114 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
115 * aSIFSTime = 10 usec
116 * aPreambleLength = 144 usec or 72 usec with short preamble
117 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
118 */
119 dur = 10; /* aSIFSTime = 10 usec */
120 dur += short_preamble ? (72 + 24) : (144 + 48);
121
122 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
123 }
124
125 return dur;
126}
127
128/* Exported duration function for driver use */
32bfd35d
JB		 129__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
130 struct ieee80211_vif *vif,
4ee73f33 131 enum ieee80211_band band,
8318d78a
JB		 132 size_t frame_len,
133 struct ieee80211_rate *rate)
c2d1560a 134{
25d834e1 135 struct ieee80211_sub_if_data *sdata;
c2d1560a 136 u16 dur;
438b61b7 137 int erp, shift = 0;
25d834e1 138 bool short_preamble = false;
c2d1560a 139
8318d78a 140 erp = 0;
25d834e1
JB		 141 if (vif) {
142 sdata = vif_to_sdata(vif);
bda3933a 143 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 144 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
145 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 146 shift = ieee80211_vif_get_shift(vif);
25d834e1 147 }
8318d78a 148
4ee73f33 149 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
438b61b7 150 short_preamble, shift);
c2d1560a
JB		 151
152 return cpu_to_le16(dur);
153}
154EXPORT_SYMBOL(ieee80211_generic_frame_duration);
155
32bfd35d
JB		 156__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
157 struct ieee80211_vif *vif, size_t frame_len,
e039fa4a 158 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 159{
160 struct ieee80211_local *local = hw_to_local(hw);
161 struct ieee80211_rate *rate;
25d834e1 162 struct ieee80211_sub_if_data *sdata;
471b3efd 163 bool short_preamble;
2103dec1 164 int erp, shift = 0, bitrate;
c2d1560a 165 u16 dur;
2e92e6f2
JB		 166 struct ieee80211_supported_band *sband;
167
4ee73f33 168 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 169
25d834e1 170 short_preamble = false;
7e9ed188 171
e039fa4a 172 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a
JB		 173
174 erp = 0;
25d834e1
JB		 175 if (vif) {
176 sdata = vif_to_sdata(vif);
bda3933a 177 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 178 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 180 shift = ieee80211_vif_get_shift(vif);
25d834e1 181 }
c2d1560a 182
2103dec1
SW		 183 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
184
c2d1560a 185 /* CTS duration */
2103dec1 186 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 187 erp, short_preamble, shift);
c2d1560a 188 /* Data frame duration */
2103dec1 189 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 190 erp, short_preamble, shift);
c2d1560a 191 /* ACK duration */
2103dec1 192 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 193 erp, short_preamble, shift);
c2d1560a
JB		 194
195 return cpu_to_le16(dur);
196}
197EXPORT_SYMBOL(ieee80211_rts_duration);
198
32bfd35d
JB		 199__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
200 struct ieee80211_vif *vif,
c2d1560a 201 size_t frame_len,
e039fa4a 202 const struct ieee80211_tx_info *frame_txctl)
c2d1560a
JB		 203{
204 struct ieee80211_local *local = hw_to_local(hw);
205 struct ieee80211_rate *rate;
25d834e1 206 struct ieee80211_sub_if_data *sdata;
471b3efd 207 bool short_preamble;
2103dec1 208 int erp, shift = 0, bitrate;
c2d1560a 209 u16 dur;
2e92e6f2
JB		 210 struct ieee80211_supported_band *sband;
211
4ee73f33 212 sband = local->hw.wiphy->bands[frame_txctl->band];
c2d1560a 213
25d834e1 214 short_preamble = false;
7e9ed188 215
e039fa4a 216 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
8318d78a 217 erp = 0;
25d834e1
JB		 218 if (vif) {
219 sdata = vif_to_sdata(vif);
bda3933a 220 short_preamble = sdata->vif.bss_conf.use_short_preamble;
25d834e1
JB		 221 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
222 erp = rate->flags & IEEE80211_RATE_ERP_G;
438b61b7 223 shift = ieee80211_vif_get_shift(vif);
25d834e1 224 }
c2d1560a 225
2103dec1
SW		 226 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
227
c2d1560a 228 /* Data frame duration */
2103dec1 229 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
438b61b7 230 erp, short_preamble, shift);
e039fa4a 231 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
c2d1560a 232 /* ACK duration */
2103dec1 233 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
438b61b7 234 erp, short_preamble, shift);
c2d1560a
JB		 235 }
236
237 return cpu_to_le16(dur);
238}
239EXPORT_SYMBOL(ieee80211_ctstoself_duration);
240
3a25a8c8
JB		 241void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
242{
243 struct ieee80211_sub_if_data *sdata;
a6f38ac3
JB		 244 int n_acs = IEEE80211_NUM_ACS;
245
246 if (local->hw.queues < IEEE80211_NUM_ACS)
247 n_acs = 1;
3a25a8c8
JB		 248
249 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
250 int ac;
251
f142c6b9
JB		 252 if (!sdata->dev)
253 continue;
254
3a25a8c8
JB		 255 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
256 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
257 continue;
258
a6f38ac3 259 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 260 int ac_queue = sdata->vif.hw_queue[ac];
261
ba8c3d6f
FF		 262 if (local->ops->wake_tx_queue &&
263 (atomic_read(&sdata->txqs_len[ac]) >
264 local->hw.txq_ac_max_pending))
265 continue;
266
3a25a8c8
JB		 267 if (ac_queue == queue ||
268 (sdata->vif.cab_queue == queue &&
269 local->queue_stop_reasons[ac_queue] == 0 &&
270 skb_queue_empty(&local->pending[ac_queue])))
271 netif_wake_subqueue(sdata->dev, ac);
272 }
273 }
274}
275
ce7c9111 276static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 277 enum queue_stop_reason reason,
278 bool refcounted)
c2d1560a
JB		 279{
280 struct ieee80211_local *local = hw_to_local(hw);
281
b5878a2d
JB		 282 trace_wake_queue(local, queue, reason);
283
e4e72fb4
JB		 284 if (WARN_ON(queue >= hw->queues))
285 return;
ce7c9111 286
ada15125
JB		 287 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
288 return;
289
cca07b00
LC		 290 if (!refcounted)
291 local->q_stop_reasons[queue][reason] = 0;
292 else
293 local->q_stop_reasons[queue][reason]--;
294
295 if (local->q_stop_reasons[queue][reason] == 0)
296 __clear_bit(reason, &local->queue_stop_reasons[queue]);
96f5e66e
JB		 297
298 if (local->queue_stop_reasons[queue] != 0)
299 /* someone still has this queue stopped */
300 return;
301
7236fe29
JB		 302 if (skb_queue_empty(&local->pending[queue])) {
303 rcu_read_lock();
3a25a8c8 304 ieee80211_propagate_queue_wake(local, queue);
7236fe29
JB		 305 rcu_read_unlock();
306 } else
3b8d81e0 307 tasklet_schedule(&local->tx_pending_tasklet);
c2d1560a 308}
ce7c9111 309
96f5e66e 310void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 311 enum queue_stop_reason reason,
312 bool refcounted)
ce7c9111
KV		 313{
314 struct ieee80211_local *local = hw_to_local(hw);
315 unsigned long flags;
316
317 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 318 __ieee80211_wake_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 319 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
320}
321
322void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
323{
324 ieee80211_wake_queue_by_reason(hw, queue,
cca07b00
LC		 325 IEEE80211_QUEUE_STOP_REASON_DRIVER,
326 false);
ce7c9111 327}
c2d1560a
JB		 328EXPORT_SYMBOL(ieee80211_wake_queue);
329
ce7c9111 330static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 331 enum queue_stop_reason reason,
332 bool refcounted)
c2d1560a
JB		 333{
334 struct ieee80211_local *local = hw_to_local(hw);
cf0277e7 335 struct ieee80211_sub_if_data *sdata;
a6f38ac3 336 int n_acs = IEEE80211_NUM_ACS;
c2d1560a 337
b5878a2d
JB		 338 trace_stop_queue(local, queue, reason);
339
e4e72fb4
JB		 340 if (WARN_ON(queue >= hw->queues))
341 return;
96f5e66e 342
cca07b00
LC		 343 if (!refcounted)
344 local->q_stop_reasons[queue][reason] = 1;
345 else
346 local->q_stop_reasons[queue][reason]++;
ada15125 347
cca07b00
LC		 348 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
349 return;
cf0277e7 350
a6f38ac3
JB		 351 if (local->hw.queues < IEEE80211_NUM_ACS)
352 n_acs = 1;
353
cf0277e7 354 rcu_read_lock();
3a25a8c8
JB		 355 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
356 int ac;
357
f142c6b9
JB		 358 if (!sdata->dev)
359 continue;
360
a6f38ac3 361 for (ac = 0; ac < n_acs; ac++) {
3a25a8c8
JB		 362 if (sdata->vif.hw_queue[ac] == queue ||
363 sdata->vif.cab_queue == queue)
364 netif_stop_subqueue(sdata->dev, ac);
365 }
366 }
cf0277e7 367 rcu_read_unlock();
c2d1560a 368}
ce7c9111 369
96f5e66e 370void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
cca07b00
LC		 371 enum queue_stop_reason reason,
372 bool refcounted)
ce7c9111
KV		 373{
374 struct ieee80211_local *local = hw_to_local(hw);
375 unsigned long flags;
376
377 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00 378 __ieee80211_stop_queue(hw, queue, reason, refcounted);
ce7c9111
KV		 379 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
380}
381
382void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
383{
384 ieee80211_stop_queue_by_reason(hw, queue,
cca07b00
LC		 385 IEEE80211_QUEUE_STOP_REASON_DRIVER,
386 false);
ce7c9111 387}
c2d1560a
JB		 388EXPORT_SYMBOL(ieee80211_stop_queue);
389
8f77f384
JB		 390void ieee80211_add_pending_skb(struct ieee80211_local *local,
391 struct sk_buff *skb)
392{
393 struct ieee80211_hw *hw = &local->hw;
394 unsigned long flags;
a7bc376c 395 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3a25a8c8 396 int queue = info->hw_queue;
a7bc376c
JB		 397
398 if (WARN_ON(!info->control.vif)) {
d4fa14cd 399 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 400 return;
401 }
8f77f384
JB		 402
403 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
cca07b00
LC		 404 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
405 false);
3b8d81e0 406 __skb_queue_tail(&local->pending[queue], skb);
cca07b00
LC		 407 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
408 false);
8f77f384
JB		 409 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
410}
411
e3685e03
JB		 412void ieee80211_add_pending_skbs(struct ieee80211_local *local,
413 struct sk_buff_head *skbs)
8f77f384
JB		 414{
415 struct ieee80211_hw *hw = &local->hw;
416 struct sk_buff *skb;
417 unsigned long flags;
b0b97a8a 418 int queue, i;
8f77f384
JB		 419
420 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
8f77f384 421 while ((skb = skb_dequeue(skbs))) {
a7bc376c
JB		 422 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
423
424 if (WARN_ON(!info->control.vif)) {
d4fa14cd 425 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 426 continue;
427 }
428
3a25a8c8 429 queue = info->hw_queue;
4644ae89
JB		 430
431 __ieee80211_stop_queue(hw, queue,
cca07b00
LC		 432 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
433 false);
4644ae89 434
3b8d81e0 435 __skb_queue_tail(&local->pending[queue], skb);
8f77f384
JB		 436 }
437
3b8d81e0 438 for (i = 0; i < hw->queues; i++)
8f77f384 439 __ieee80211_wake_queue(hw, i,
cca07b00
LC		 440 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
441 false);
8f77f384 442 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
8f77f384
JB		 443}
444
ce7c9111 445void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 446 unsigned long queues,
cca07b00
LC		 447 enum queue_stop_reason reason,
448 bool refcounted)
c2d1560a 449{
ce7c9111
KV		 450 struct ieee80211_local *local = hw_to_local(hw);
451 unsigned long flags;
c2d1560a
JB		 452 int i;
453
ce7c9111
KV		 454 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
455
445ea4e8 456 for_each_set_bit(i, &queues, hw->queues)
cca07b00 457 __ieee80211_stop_queue(hw, i, reason, refcounted);
ce7c9111
KV		 458
459 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
460}
461
462void ieee80211_stop_queues(struct ieee80211_hw *hw)
463{
445ea4e8 464 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 465 IEEE80211_QUEUE_STOP_REASON_DRIVER,
466 false);
c2d1560a
JB		 467}
468EXPORT_SYMBOL(ieee80211_stop_queues);
469
92ab8535
TW		 470int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
471{
472 struct ieee80211_local *local = hw_to_local(hw);
3b8d81e0
JB		 473 unsigned long flags;
474 int ret;
96f5e66e 475
e4e72fb4
JB		 476 if (WARN_ON(queue >= hw->queues))
477 return true;
96f5e66e 478
3b8d81e0 479 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2419ea14
TP		 480 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
481 &local->queue_stop_reasons[queue]);
3b8d81e0
JB		 482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
483 return ret;
92ab8535
TW		 484}
485EXPORT_SYMBOL(ieee80211_queue_stopped);
486
ce7c9111 487void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
445ea4e8 488 unsigned long queues,
cca07b00
LC		 489 enum queue_stop_reason reason,
490 bool refcounted)
c2d1560a 491{
ce7c9111
KV		 492 struct ieee80211_local *local = hw_to_local(hw);
493 unsigned long flags;
c2d1560a
JB		 494 int i;
495
ce7c9111
KV		 496 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
497
445ea4e8 498 for_each_set_bit(i, &queues, hw->queues)
cca07b00 499 __ieee80211_wake_queue(hw, i, reason, refcounted);
ce7c9111
KV		 500
501 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
502}
503
504void ieee80211_wake_queues(struct ieee80211_hw *hw)
505{
445ea4e8 506 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 507 IEEE80211_QUEUE_STOP_REASON_DRIVER,
508 false);
c2d1560a
JB		 509}
510EXPORT_SYMBOL(ieee80211_wake_queues);
dabeb344 511
26da23b6
LC		 512static unsigned int
513ieee80211_get_vif_queues(struct ieee80211_local *local,
514 struct ieee80211_sub_if_data *sdata)
39ecc01d 515{
26da23b6 516 unsigned int queues;
39ecc01d 517
30686bf7 518 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
39ecc01d
JB		 519 int ac;
520
521 queues = 0;
522
523 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
524 queues |= BIT(sdata->vif.hw_queue[ac]);
525 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
526 queues |= BIT(sdata->vif.cab_queue);
527 } else {
528 /* all queues */
529 queues = BIT(local->hw.queues) - 1;
530 }
531
26da23b6
LC		 532 return queues;
533}
534
4f9610d5
LK		 535void __ieee80211_flush_queues(struct ieee80211_local *local,
536 struct ieee80211_sub_if_data *sdata,
3b24f4c6 537 unsigned int queues, bool drop)
26da23b6 538{
26da23b6
LC		 539 if (!local->ops->flush)
540 return;
541
4f9610d5
LK		 542 /*
543 * If no queue was set, or if the HW doesn't support
544 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
545 */
30686bf7 546 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
4f9610d5 547 queues = ieee80211_get_vif_queues(local, sdata);
26da23b6 548
59f48fe2 549 ieee80211_stop_queues_by_reason(&local->hw, queues,
cca07b00
LC		 550 IEEE80211_QUEUE_STOP_REASON_FLUSH,
551 false);
445ea4e8 552
3b24f4c6 553 drv_flush(local, sdata, queues, drop);
445ea4e8 554
59f48fe2 555 ieee80211_wake_queues_by_reason(&local->hw, queues,
cca07b00
LC		 556 IEEE80211_QUEUE_STOP_REASON_FLUSH,
557 false);
39ecc01d
JB		 558}
559
4f9610d5 560void ieee80211_flush_queues(struct ieee80211_local *local,
3b24f4c6 561 struct ieee80211_sub_if_data *sdata, bool drop)
4f9610d5 562{
3b24f4c6 563 __ieee80211_flush_queues(local, sdata, 0, drop);
4f9610d5
LK		 564}
565
26da23b6
LC		 566void ieee80211_stop_vif_queues(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata,
568 enum queue_stop_reason reason)
569{
570 ieee80211_stop_queues_by_reason(&local->hw,
571 ieee80211_get_vif_queues(local, sdata),
572 reason, true);
573}
574
575void ieee80211_wake_vif_queues(struct ieee80211_local *local,
576 struct ieee80211_sub_if_data *sdata,
577 enum queue_stop_reason reason)
578{
579 ieee80211_wake_queues_by_reason(&local->hw,
580 ieee80211_get_vif_queues(local, sdata),
581 reason, true);
582}
583
3384d757
AN		 584static void __iterate_interfaces(struct ieee80211_local *local,
585 u32 iter_flags,
586 void (*iterator)(void *data, u8 *mac,
587 struct ieee80211_vif *vif),
588 void *data)
dabeb344 589{
dabeb344 590 struct ieee80211_sub_if_data *sdata;
3384d757 591 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
dabeb344 592
c7c71066 593 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2f561feb 594 switch (sdata->vif.type) {
05c914fe 595 case NL80211_IFTYPE_MONITOR:
31eba5bc
FF		 596 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
597 continue;
598 break;
05c914fe 599 case NL80211_IFTYPE_AP_VLAN:
2f561feb 600 continue;
2ca27bcf 601 default:
2f561feb
ID		 602 break;
603 }
8b2c9824 604 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
3384d757 605 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
8b2c9824 606 continue;
3384d757 607 if (ieee80211_sdata_running(sdata) || !active_only)
47846c9b 608 iterator(data, sdata->vif.addr,
2f561feb
ID		 609 &sdata->vif);
610 }
611
c7c71066
JB		 612 sdata = rcu_dereference_check(local->monitor_sdata,
613 lockdep_is_held(&local->iflist_mtx) ||
614 lockdep_rtnl_is_held());
8b2c9824 615 if (sdata &&
3384d757 616 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
8b2c9824 617 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
685fb72b 618 iterator(data, sdata->vif.addr, &sdata->vif);
c7c71066 619}
685fb72b 620
3384d757 621void ieee80211_iterate_interfaces(
c7c71066
JB		 622 struct ieee80211_hw *hw, u32 iter_flags,
623 void (*iterator)(void *data, u8 *mac,
624 struct ieee80211_vif *vif),
625 void *data)
626{
627 struct ieee80211_local *local = hw_to_local(hw);
628
629 mutex_lock(&local->iflist_mtx);
3384d757 630 __iterate_interfaces(local, iter_flags, iterator, data);
c771c9d8 631 mutex_unlock(&local->iflist_mtx);
2f561feb 632}
3384d757 633EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
2f561feb
ID		 634
635void ieee80211_iterate_active_interfaces_atomic(
8b2c9824 636 struct ieee80211_hw *hw, u32 iter_flags,
2f561feb
ID		 637 void (*iterator)(void *data, u8 *mac,
638 struct ieee80211_vif *vif),
639 void *data)
640{
641 struct ieee80211_local *local = hw_to_local(hw);
2f561feb 642
e38bad47 643 rcu_read_lock();
3384d757
AN		 644 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
645 iterator, data);
c7c71066
JB		 646 rcu_read_unlock();
647}
648EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
dabeb344 649
c7c71066
JB		 650void ieee80211_iterate_active_interfaces_rtnl(
651 struct ieee80211_hw *hw, u32 iter_flags,
652 void (*iterator)(void *data, u8 *mac,
653 struct ieee80211_vif *vif),
654 void *data)
655{
656 struct ieee80211_local *local = hw_to_local(hw);
e38bad47 657
c7c71066 658 ASSERT_RTNL();
685fb72b 659
3384d757
AN		 660 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
661 iterator, data);
dabeb344 662}
c7c71066 663EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
37ffc8da 664
0fc1e049
AN		 665static void __iterate_stations(struct ieee80211_local *local,
666 void (*iterator)(void *data,
667 struct ieee80211_sta *sta),
668 void *data)
669{
670 struct sta_info *sta;
671
672 list_for_each_entry_rcu(sta, &local->sta_list, list) {
673 if (!sta->uploaded)
674 continue;
675
676 iterator(data, &sta->sta);
677 }
678}
679
680void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
681 void (*iterator)(void *data,
682 struct ieee80211_sta *sta),
683 void *data)
684{
685 struct ieee80211_local *local = hw_to_local(hw);
686
687 rcu_read_lock();
688 __iterate_stations(local, iterator, data);
689 rcu_read_unlock();
690}
691EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
692
ad7e718c
JB		 693struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
694{
695 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
696
697 if (!ieee80211_sdata_running(sdata) ||
698 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
699 return NULL;
700 return &sdata->vif;
701}
702EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
703
dc5a1ad7
EG		 704struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
705{
6513e98e
JB		 706 struct ieee80211_sub_if_data *sdata;
707
708 if (!vif)
709 return NULL;
710
711 sdata = vif_to_sdata(vif);
dc5a1ad7
EG		 712
713 if (!ieee80211_sdata_running(sdata) ||
714 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
715 return NULL;
716
717 return &sdata->wdev;
718}
719EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
720
42935eca
LR		 721/*
722 * Nothing should have been stuffed into the workqueue during
4afaff17
EG		 723 * the suspend->resume cycle. Since we can't check each caller
724 * of this function if we are already quiescing / suspended,
725 * check here and don't WARN since this can actually happen when
726 * the rx path (for example) is racing against __ieee80211_suspend
727 * and suspending / quiescing was set after the rx path checked
728 * them.
42935eca
LR		 729 */
730static bool ieee80211_can_queue_work(struct ieee80211_local *local)
731{
4afaff17
EG		 732 if (local->quiescing || (local->suspended && !local->resuming)) {
733 pr_warn("queueing ieee80211 work while going to suspend\n");
ceb99fe0 734 return false;
4afaff17 735 }
42935eca
LR		 736
737 return true;
738}
739
740void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
741{
742 struct ieee80211_local *local = hw_to_local(hw);
743
744 if (!ieee80211_can_queue_work(local))
745 return;
746
747 queue_work(local->workqueue, work);
748}
749EXPORT_SYMBOL(ieee80211_queue_work);
750
751void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
752 struct delayed_work *dwork,
753 unsigned long delay)
754{
755 struct ieee80211_local *local = hw_to_local(hw);
756
757 if (!ieee80211_can_queue_work(local))
758 return;
759
760 queue_delayed_work(local->workqueue, dwork, delay);
761}
762EXPORT_SYMBOL(ieee80211_queue_delayed_work);
763
35d865af 764u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
dd76986b
JB		 765 struct ieee802_11_elems *elems,
766 u64 filter, u32 crc)
767{
768 size_t left = len;
35d865af 769 const u8 *pos = start;
dd76986b 770 bool calc_crc = filter != 0;
fcff4f10 771 DECLARE_BITMAP(seen_elems, 256);
b2e506bf 772 const u8 *ie;
dd76986b 773
fcff4f10 774 bitmap_zero(seen_elems, 256);
dd76986b
JB		 775 memset(elems, 0, sizeof(*elems));
776 elems->ie_start = start;
777 elems->total_len = len;
778
779 while (left >= 2) {
780 u8 id, elen;
fcff4f10 781 bool elem_parse_failed;
dd76986b
JB		 782
783 id = *pos++;
784 elen = *pos++;
785 left -= 2;
786
fcff4f10
PS		 787 if (elen > left) {
788 elems->parse_error = true;
dd76986b 789 break;
fcff4f10
PS		 790 }
791
9690fb16
JB		 792 switch (id) {
793 case WLAN_EID_SSID:
794 case WLAN_EID_SUPP_RATES:
795 case WLAN_EID_FH_PARAMS:
796 case WLAN_EID_DS_PARAMS:
797 case WLAN_EID_CF_PARAMS:
798 case WLAN_EID_TIM:
799 case WLAN_EID_IBSS_PARAMS:
800 case WLAN_EID_CHALLENGE:
801 case WLAN_EID_RSN:
802 case WLAN_EID_ERP_INFO:
803 case WLAN_EID_EXT_SUPP_RATES:
804 case WLAN_EID_HT_CAPABILITY:
805 case WLAN_EID_HT_OPERATION:
806 case WLAN_EID_VHT_CAPABILITY:
807 case WLAN_EID_VHT_OPERATION:
808 case WLAN_EID_MESH_ID:
809 case WLAN_EID_MESH_CONFIG:
810 case WLAN_EID_PEER_MGMT:
811 case WLAN_EID_PREQ:
812 case WLAN_EID_PREP:
813 case WLAN_EID_PERR:
814 case WLAN_EID_RANN:
815 case WLAN_EID_CHANNEL_SWITCH:
816 case WLAN_EID_EXT_CHANSWITCH_ANN:
817 case WLAN_EID_COUNTRY:
818 case WLAN_EID_PWR_CONSTRAINT:
819 case WLAN_EID_TIMEOUT_INTERVAL:
85220d71 820 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
b2e506bf 821 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
8f2535b9 822 case WLAN_EID_CHAN_SWITCH_PARAM:
9041c1fa 823 case WLAN_EID_EXT_CAPABILITY:
53837584
AN		 824 case WLAN_EID_CHAN_SWITCH_TIMING:
825 case WLAN_EID_LINK_ID:
b2e506bf
JB		 826 /*
827 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
828 * that if the content gets bigger it might be needed more than once
829 */
9690fb16
JB		 830 if (test_bit(id, seen_elems)) {
831 elems->parse_error = true;
832 left -= elen;
833 pos += elen;
834 continue;
835 }
836 break;
fcff4f10 837 }
dd76986b
JB		 838
839 if (calc_crc && id < 64 && (filter & (1ULL << id)))
840 crc = crc32_be(crc, pos - 2, elen + 2);
841
fcff4f10
PS		 842 elem_parse_failed = false;
843
dd76986b 844 switch (id) {
53837584
AN		 845 case WLAN_EID_LINK_ID:
846 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
847 elem_parse_failed = true;
848 break;
849 }
850 elems->lnk_id = (void *)(pos - 2);
851 break;
852 case WLAN_EID_CHAN_SWITCH_TIMING:
853 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
854 elem_parse_failed = true;
855 break;
856 }
857 elems->ch_sw_timing = (void *)pos;
858 break;
9041c1fa
AN		 859 case WLAN_EID_EXT_CAPABILITY:
860 elems->ext_capab = pos;
861 elems->ext_capab_len = elen;
862 break;
dd76986b
JB		 863 case WLAN_EID_SSID:
864 elems->ssid = pos;
865 elems->ssid_len = elen;
866 break;
867 case WLAN_EID_SUPP_RATES:
868 elems->supp_rates = pos;
869 elems->supp_rates_len = elen;
870 break;
dd76986b 871 case WLAN_EID_DS_PARAMS:
1cd8e88e
JB		 872 if (elen >= 1)
873 elems->ds_params = pos;
874 else
875 elem_parse_failed = true;
dd76986b 876 break;
dd76986b
JB		 877 case WLAN_EID_TIM:
878 if (elen >= sizeof(struct ieee80211_tim_ie)) {
879 elems->tim = (void *)pos;
880 elems->tim_len = elen;
fcff4f10
PS		 881 } else
882 elem_parse_failed = true;
dd76986b 883 break;
dd76986b
JB		 884 case WLAN_EID_CHALLENGE:
885 elems->challenge = pos;
886 elems->challenge_len = elen;
887 break;
888 case WLAN_EID_VENDOR_SPECIFIC:
889 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
890 pos[2] == 0xf2) {
891 /* Microsoft OUI (00:50:F2) */
892
893 if (calc_crc)
894 crc = crc32_be(crc, pos - 2, elen + 2);
895
441a33ba 896 if (elen >= 5 && pos[3] == 2) {
dd76986b
JB		 897 /* OUI Type 2 - WMM IE */
898 if (pos[4] == 0) {
899 elems->wmm_info = pos;
900 elems->wmm_info_len = elen;
901 } else if (pos[4] == 1) {
902 elems->wmm_param = pos;
903 elems->wmm_param_len = elen;
904 }
905 }
906 }
907 break;
908 case WLAN_EID_RSN:
909 elems->rsn = pos;
910 elems->rsn_len = elen;
911 break;
912 case WLAN_EID_ERP_INFO:
1946bed9
JB		 913 if (elen >= 1)
914 elems->erp_info = pos;
915 else
916 elem_parse_failed = true;
dd76986b
JB		 917 break;
918 case WLAN_EID_EXT_SUPP_RATES:
919 elems->ext_supp_rates = pos;
920 elems->ext_supp_rates_len = elen;
921 break;
922 case WLAN_EID_HT_CAPABILITY:
923 if (elen >= sizeof(struct ieee80211_ht_cap))
924 elems->ht_cap_elem = (void *)pos;
fcff4f10
PS		 925 else
926 elem_parse_failed = true;
dd76986b 927 break;
074d46d1
JB		 928 case WLAN_EID_HT_OPERATION:
929 if (elen >= sizeof(struct ieee80211_ht_operation))
930 elems->ht_operation = (void *)pos;
fcff4f10
PS		 931 else
932 elem_parse_failed = true;
dd76986b 933 break;
818255ea
MP		 934 case WLAN_EID_VHT_CAPABILITY:
935 if (elen >= sizeof(struct ieee80211_vht_cap))
936 elems->vht_cap_elem = (void *)pos;
937 else
938 elem_parse_failed = true;
939 break;
940 case WLAN_EID_VHT_OPERATION:
941 if (elen >= sizeof(struct ieee80211_vht_operation))
942 elems->vht_operation = (void *)pos;
943 else
944 elem_parse_failed = true;
945 break;
bee7f586
JB		 946 case WLAN_EID_OPMODE_NOTIF:
947 if (elen > 0)
948 elems->opmode_notif = pos;
949 else
950 elem_parse_failed = true;
951 break;
dd76986b
JB		 952 case WLAN_EID_MESH_ID:
953 elems->mesh_id = pos;
954 elems->mesh_id_len = elen;
955 break;
956 case WLAN_EID_MESH_CONFIG:
957 if (elen >= sizeof(struct ieee80211_meshconf_ie))
958 elems->mesh_config = (void *)pos;
fcff4f10
PS		 959 else
960 elem_parse_failed = true;
dd76986b
JB		 961 break;
962 case WLAN_EID_PEER_MGMT:
963 elems->peering = pos;
964 elems->peering_len = elen;
965 break;
3f52b7e3
MP		 966 case WLAN_EID_MESH_AWAKE_WINDOW:
967 if (elen >= 2)
968 elems->awake_window = (void *)pos;
969 break;
dd76986b
JB		 970 case WLAN_EID_PREQ:
971 elems->preq = pos;
972 elems->preq_len = elen;
973 break;
974 case WLAN_EID_PREP:
975 elems->prep = pos;
976 elems->prep_len = elen;
977 break;
978 case WLAN_EID_PERR:
979 elems->perr = pos;
980 elems->perr_len = elen;
981 break;
982 case WLAN_EID_RANN:
983 if (elen >= sizeof(struct ieee80211_rann_ie))
984 elems->rann = (void *)pos;
fcff4f10
PS		 985 else
986 elem_parse_failed = true;
dd76986b
JB		 987 break;
988 case WLAN_EID_CHANNEL_SWITCH:
5bc1420b
JB		 989 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
990 elem_parse_failed = true;
991 break;
992 }
993 elems->ch_switch_ie = (void *)pos;
dd76986b 994 break;
b4f286a1
JB		 995 case WLAN_EID_EXT_CHANSWITCH_ANN:
996 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
997 elem_parse_failed = true;
998 break;
999 }
1000 elems->ext_chansw_ie = (void *)pos;
1001 break;
85220d71
JB		 1002 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1003 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1004 elem_parse_failed = true;
1005 break;
1006 }
1007 elems->sec_chan_offs = (void *)pos;
1008 break;
8f2535b9
CYY		 1009 case WLAN_EID_CHAN_SWITCH_PARAM:
1010 if (elen !=
1011 sizeof(*elems->mesh_chansw_params_ie)) {
1012 elem_parse_failed = true;
1013 break;
1014 }
1015 elems->mesh_chansw_params_ie = (void *)pos;
1016 break;
b2e506bf
JB		 1017 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1018 if (!action ||
1019 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1020 elem_parse_failed = true;
1021 break;
1022 }
1023 elems->wide_bw_chansw_ie = (void *)pos;
1024 break;
1025 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1026 if (action) {
1027 elem_parse_failed = true;
1028 break;
1029 }
1030 /*
1031 * This is a bit tricky, but as we only care about
1032 * the wide bandwidth channel switch element, so
1033 * just parse it out manually.
1034 */
1035 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1036 pos, elen);
1037 if (ie) {
1038 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1039 elems->wide_bw_chansw_ie =
1040 (void *)(ie + 2);
1041 else
1042 elem_parse_failed = true;
1043 }
1044 break;
dd76986b
JB		 1045 case WLAN_EID_COUNTRY:
1046 elems->country_elem = pos;
1047 elems->country_elem_len = elen;
1048 break;
1049 case WLAN_EID_PWR_CONSTRAINT:
761a48d2
JB		 1050 if (elen != 1) {
1051 elem_parse_failed = true;
1052 break;
1053 }
dd76986b 1054 elems->pwr_constr_elem = pos;
dd76986b 1055 break;
c8d65917
SG		 1056 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1057 /* Lots of different options exist, but we only care
1058 * about the Dynamic Transmit Power Control element.
1059 * First check for the Cisco OUI, then for the DTPC
1060 * tag (0x00).
1061 */
1062 if (elen < 4) {
1063 elem_parse_failed = true;
1064 break;
1065 }
1066
1067 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1068 pos[2] != 0x96 || pos[3] != 0x00)
1069 break;
1070
1071 if (elen != 6) {
1072 elem_parse_failed = true;
1073 break;
1074 }
1075
1076 if (calc_crc)
1077 crc = crc32_be(crc, pos - 2, elen + 2);
1078
1079 elems->cisco_dtpc_elem = pos;
1080 break;
dd76986b 1081 case WLAN_EID_TIMEOUT_INTERVAL:
79ba1d89
JB		 1082 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1083 elems->timeout_int = (void *)pos;
1084 else
1085 elem_parse_failed = true;
dd76986b
JB		 1086 break;
1087 default:
1088 break;
1089 }
1090
fcff4f10
PS		 1091 if (elem_parse_failed)
1092 elems->parse_error = true;
1093 else
5df45690 1094 __set_bit(id, seen_elems);
fcff4f10 1095
dd76986b
JB		 1096 left -= elen;
1097 pos += elen;
1098 }
1099
fcff4f10
PS		 1100 if (left != 0)
1101 elems->parse_error = true;
1102
dd76986b
JB		 1103 return crc;
1104}
1105
3abead59
JB		 1106void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1107 bool bss_notify)
5825fe10
JB		 1108{
1109 struct ieee80211_local *local = sdata->local;
1110 struct ieee80211_tx_queue_params qparam;
55de908a 1111 struct ieee80211_chanctx_conf *chanctx_conf;
54bcbc69 1112 int ac;
a8ce8544 1113 bool use_11b, enable_qos;
239281f8 1114 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
aa837e1d 1115 int aCWmin, aCWmax;
5825fe10
JB		 1116
1117 if (!local->ops->conf_tx)
1118 return;
1119
54bcbc69
JB		 1120 if (local->hw.queues < IEEE80211_NUM_ACS)
1121 return;
1122
5825fe10
JB		 1123 memset(&qparam, 0, sizeof(qparam));
1124
55de908a
JB		 1125 rcu_read_lock();
1126 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1127 use_11b = (chanctx_conf &&
4bf88530 1128 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
aa837e1d 1129 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
55de908a 1130 rcu_read_unlock();
5825fe10 1131
a8ce8544
SG		 1132 /*
1133 * By default disable QoS in STA mode for old access points, which do
1134 * not support 802.11e. New APs will provide proper queue parameters,
1135 * that we will configure later.
1136 */
1137 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1138
239281f8
RL		 1139 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1140
1f4ffde8
FZ		 1141 /* Set defaults according to 802.11-2007 Table 7-37 */
1142 aCWmax = 1023;
1143 if (use_11b)
1144 aCWmin = 31;
1145 else
1146 aCWmin = 15;
1147
1148 /* Confiure old 802.11b/g medium access rules. */
1149 qparam.cw_max = aCWmax;
1150 qparam.cw_min = aCWmin;
1151 qparam.txop = 0;
1152 qparam.aifs = 2;
aa837e1d 1153
1f4ffde8
FZ		 1154 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1155 /* Update if QoS is enabled. */
a8ce8544
SG		 1156 if (enable_qos) {
1157 switch (ac) {
1158 case IEEE80211_AC_BK:
1159 qparam.cw_max = aCWmax;
1160 qparam.cw_min = aCWmin;
1161 qparam.txop = 0;
239281f8
RL		 1162 if (is_ocb)
1163 qparam.aifs = 9;
1164 else
1165 qparam.aifs = 7;
a8ce8544
SG		 1166 break;
1167 /* never happens but let's not leave undefined */
1168 default:
1169 case IEEE80211_AC_BE:
1170 qparam.cw_max = aCWmax;
1171 qparam.cw_min = aCWmin;
1172 qparam.txop = 0;
239281f8
RL		 1173 if (is_ocb)
1174 qparam.aifs = 6;
1175 else
1176 qparam.aifs = 3;
a8ce8544
SG		 1177 break;
1178 case IEEE80211_AC_VI:
1179 qparam.cw_max = aCWmin;
1180 qparam.cw_min = (aCWmin + 1) / 2 - 1;
239281f8
RL		 1181 if (is_ocb)
1182 qparam.txop = 0;
1183 else if (use_11b)
a8ce8544
SG		 1184 qparam.txop = 6016/32;
1185 else
1186 qparam.txop = 3008/32;
239281f8
RL		 1187
1188 if (is_ocb)
1189 qparam.aifs = 3;
1190 else
1191 qparam.aifs = 2;
a8ce8544
SG		 1192 break;
1193 case IEEE80211_AC_VO:
1194 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1195 qparam.cw_min = (aCWmin + 1) / 4 - 1;
239281f8
RL		 1196 if (is_ocb)
1197 qparam.txop = 0;
1198 else if (use_11b)
a8ce8544
SG		 1199 qparam.txop = 3264/32;
1200 else
1201 qparam.txop = 1504/32;
1202 qparam.aifs = 2;
1203 break;
1204 }
aa837e1d 1205 }
5825fe10 1206
ab13315a
KV		 1207 qparam.uapsd = false;
1208
54bcbc69
JB		 1209 sdata->tx_conf[ac] = qparam;
1210 drv_conf_tx(local, sdata, ac, &qparam);
aa837e1d 1211 }
e1b3ec1a 1212
f142c6b9
JB		 1213 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1214 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
a8ce8544 1215 sdata->vif.bss_conf.qos = enable_qos;
3abead59
JB		 1216 if (bss_notify)
1217 ieee80211_bss_info_change_notify(sdata,
1218 BSS_CHANGED_QOS);
d9734979 1219 }
5825fe10 1220}
e50db65c 1221
46900298 1222void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
700e8ea6 1223 u16 transaction, u16 auth_alg, u16 status,
4a3cb702 1224 const u8 *extra, size_t extra_len, const u8 *da,
1672c0e3
JB		 1225 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1226 u32 tx_flags)
46900298
JB		 1227{
1228 struct ieee80211_local *local = sdata->local;
1229 struct sk_buff *skb;
1230 struct ieee80211_mgmt *mgmt;
fffd0934 1231 int err;
46900298 1232
15e230ab 1233 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
744462a9
MS		 1234 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1235 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
d15b8459 1236 if (!skb)
46900298 1237 return;
d15b8459 1238
744462a9 1239 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
46900298
JB		 1240
1241 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1242 memset(mgmt, 0, 24 + 6);
1243 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1244 IEEE80211_STYPE_AUTH);
efa6a09d 1245 memcpy(mgmt->da, da, ETH_ALEN);
47846c9b 1246 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
46900298
JB		 1247 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1248 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1249 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
700e8ea6 1250 mgmt->u.auth.status_code = cpu_to_le16(status);
46900298
JB		 1251 if (extra)
1252 memcpy(skb_put(skb, extra_len), extra, extra_len);
46900298 1253
fffd0934
JB		 1254 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1255 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1256 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1257 WARN_ON(err);
1258 }
1259
1672c0e3
JB		 1260 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1261 tx_flags;
62ae67be 1262 ieee80211_tx_skb(sdata, skb);
46900298
JB		 1263}
1264
6ae16775
AQ		 1265void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1266 const u8 *bssid, u16 stype, u16 reason,
1267 bool send_frame, u8 *frame_buf)
1268{
1269 struct ieee80211_local *local = sdata->local;
1270 struct sk_buff *skb;
1271 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1272
1273 /* build frame */
1274 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1275 mgmt->duration = 0; /* initialize only */
1276 mgmt->seq_ctrl = 0; /* initialize only */
1277 memcpy(mgmt->da, bssid, ETH_ALEN);
1278 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1279 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1280 /* u.deauth.reason_code == u.disassoc.reason_code */
1281 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1282
1283 if (send_frame) {
1284 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1285 IEEE80211_DEAUTH_FRAME_LEN);
1286 if (!skb)
1287 return;
1288
1289 skb_reserve(skb, local->hw.extra_tx_headroom);
1290
1291 /* copy in frame */
1292 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1293 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1294
1295 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1296 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1297 IEEE80211_SKB_CB(skb)->flags |=
1298 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1299
1300 ieee80211_tx_skb(sdata, skb);
1301 }
1302}
1303
c56ef672
DS		 1304static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1305 u8 *buffer, size_t buffer_len,
1306 const u8 *ie, size_t ie_len,
1307 enum ieee80211_band band,
1308 u32 rate_mask,
1309 struct cfg80211_chan_def *chandef,
1310 size_t *offset)
de95a54b
JB		 1311{
1312 struct ieee80211_supported_band *sband;
c604b9f2 1313 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1314 size_t noffset;
8e664fb3 1315 int supp_rates_len, i;
8dcb2003
JM		 1316 u8 rates[32];
1317 int num_rates;
1318 int ext_rates_len;
2103dec1
SW		 1319 int shift;
1320 u32 rate_flags;
40a11ca8 1321 bool have_80mhz = false;
de95a54b 1322
c56ef672
DS		 1323 *offset = 0;
1324
4d36ec58 1325 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1326 if (WARN_ON_ONCE(!sband))
1327 return 0;
de95a54b 1328
2103dec1
SW		 1329 rate_flags = ieee80211_chandef_rate_flags(chandef);
1330 shift = ieee80211_chandef_get_shift(chandef);
1331
8dcb2003
JM		 1332 num_rates = 0;
1333 for (i = 0; i < sband->n_bitrates; i++) {
1334 if ((BIT(i) & rate_mask) == 0)
1335 continue; /* skip rate */
2103dec1
SW		 1336 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1337 continue;
1338
1339 rates[num_rates++] =
1340 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1341 (1 << shift) * 5);
8dcb2003
JM		 1342 }
1343
1344 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1345
c604b9f2
JB		 1346 if (end - pos < 2 + supp_rates_len)
1347 goto out_err;
de95a54b 1348 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1349 *pos++ = supp_rates_len;
8dcb2003
JM		 1350 memcpy(pos, rates, supp_rates_len);
1351 pos += supp_rates_len;
8e664fb3
JB		 1352
1353 /* insert "request information" if in custom IEs */
1354 if (ie && ie_len) {
1355 static const u8 before_extrates[] = {
1356 WLAN_EID_SSID,
1357 WLAN_EID_SUPP_RATES,
1358 WLAN_EID_REQUEST,
1359 };
1360 noffset = ieee80211_ie_split(ie, ie_len,
1361 before_extrates,
1362 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1363 *offset);
1364 if (end - pos < noffset - *offset)
c604b9f2 1365 goto out_err;
c56ef672
DS		 1366 memcpy(pos, ie + *offset, noffset - *offset);
1367 pos += noffset - *offset;
1368 *offset = noffset;
8e664fb3
JB		 1369 }
1370
8dcb2003
JM		 1371 ext_rates_len = num_rates - supp_rates_len;
1372 if (ext_rates_len > 0) {
c604b9f2
JB		 1373 if (end - pos < 2 + ext_rates_len)
1374 goto out_err;
8e664fb3 1375 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1376 *pos++ = ext_rates_len;
1377 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1378 pos += ext_rates_len;
8e664fb3
JB		 1379 }
1380
2103dec1 1381 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1382 if (end - pos < 3)
1383 goto out_err;
651b5225
JM		 1384 *pos++ = WLAN_EID_DS_PARAMS;
1385 *pos++ = 1;
2103dec1
SW		 1386 *pos++ = ieee80211_frequency_to_channel(
1387 chandef->chan->center_freq);
651b5225
JM		 1388 }
1389
8e664fb3
JB		 1390 /* insert custom IEs that go before HT */
1391 if (ie && ie_len) {
1392 static const u8 before_ht[] = {
1393 WLAN_EID_SSID,
1394 WLAN_EID_SUPP_RATES,
1395 WLAN_EID_REQUEST,
1396 WLAN_EID_EXT_SUPP_RATES,
1397 WLAN_EID_DS_PARAMS,
1398 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1399 };
1400 noffset = ieee80211_ie_split(ie, ie_len,
1401 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1402 *offset);
1403 if (end - pos < noffset - *offset)
c604b9f2 1404 goto out_err;
c56ef672
DS		 1405 memcpy(pos, ie + *offset, noffset - *offset);
1406 pos += noffset - *offset;
1407 *offset = noffset;
de95a54b
JB		 1408 }
1409
c604b9f2
JB		 1410 if (sband->ht_cap.ht_supported) {
1411 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1412 goto out_err;
ef96a842
BG		 1413 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1414 sband->ht_cap.cap);
c604b9f2 1415 }
5ef2d41a 1416
de95a54b
JB		 1417 /*
1418 * If adding more here, adjust code in main.c
1419 * that calculates local->scan_ies_len.
1420 */
1421
4d952300 1422 /* insert custom IEs that go before VHT */
8e664fb3 1423 if (ie && ie_len) {
4d952300
JB		 1424 static const u8 before_vht[] = {
1425 WLAN_EID_SSID,
1426 WLAN_EID_SUPP_RATES,
1427 WLAN_EID_REQUEST,
1428 WLAN_EID_EXT_SUPP_RATES,
1429 WLAN_EID_DS_PARAMS,
1430 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1431 WLAN_EID_HT_CAPABILITY,
1432 WLAN_EID_BSS_COEX_2040,
1433 WLAN_EID_EXT_CAPABILITY,
1434 WLAN_EID_SSID_LIST,
1435 WLAN_EID_CHANNEL_USAGE,
1436 WLAN_EID_INTERWORKING,
1437 /* mesh ID can't happen here */
1438 /* 60 GHz can't happen here right now */
1439 };
1440 noffset = ieee80211_ie_split(ie, ie_len,
1441 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1442 *offset);
1443 if (end - pos < noffset - *offset)
c604b9f2 1444 goto out_err;
c56ef672
DS		 1445 memcpy(pos, ie + *offset, noffset - *offset);
1446 pos += noffset - *offset;
1447 *offset = noffset;
de95a54b
JB		 1448 }
1449
40a11ca8
JB		 1450 /* Check if any channel in this sband supports at least 80 MHz */
1451 for (i = 0; i < sband->n_channels; i++) {
fa44b988
AN		 1452 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1453 IEEE80211_CHAN_NO_80MHZ))
1454 continue;
1455
1456 have_80mhz = true;
1457 break;
40a11ca8
JB		 1458 }
1459
1460 if (sband->vht_cap.vht_supported && have_80mhz) {
c604b9f2
JB		 1461 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1462 goto out_err;
ba0afa2f
MP		 1463 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1464 sband->vht_cap.cap);
c604b9f2 1465 }
ba0afa2f 1466
c604b9f2
JB		 1467 return pos - buffer;
1468 out_err:
1469 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1470 return pos - buffer;
1471}
1472
c56ef672
DS		 1473int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1474 size_t buffer_len,
1475 struct ieee80211_scan_ies *ie_desc,
1476 const u8 *ie, size_t ie_len,
1477 u8 bands_used, u32 *rate_masks,
1478 struct cfg80211_chan_def *chandef)
1479{
1480 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1481 int i;
1482
1483 memset(ie_desc, 0, sizeof(*ie_desc));
1484
1485 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1486 if (bands_used & BIT(i)) {
1487 pos += ieee80211_build_preq_ies_band(local,
1488 buffer + pos,
1489 buffer_len - pos,
1490 ie, ie_len, i,
1491 rate_masks[i],
1492 chandef,
1493 &custom_ie_offset);
1494 ie_desc->ies[i] = buffer + old_pos;
1495 ie_desc->len[i] = pos - old_pos;
1496 old_pos = pos;
1497 }
1498 }
1499
1500 /* add any remaining custom IEs */
1501 if (ie && ie_len) {
1502 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1503 "not enough space for preq custom IEs\n"))
1504 return pos;
1505 memcpy(buffer + pos, ie + custom_ie_offset,
1506 ie_len - custom_ie_offset);
1507 ie_desc->common_ies = buffer + pos;
1508 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1509 pos += ie_len - custom_ie_offset;
1510 }
1511
1512 return pos;
1513};
1514
a619a4c0 1515struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
a344d677
JB		 1516 const u8 *src, const u8 *dst,
1517 u32 ratemask,
6b77863b 1518 struct ieee80211_channel *chan,
a619a4c0 1519 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1520 const u8 *ie, size_t ie_len,
1521 bool directed)
46900298
JB		 1522{
1523 struct ieee80211_local *local = sdata->local;
2103dec1 1524 struct cfg80211_chan_def chandef;
46900298
JB		 1525 struct sk_buff *skb;
1526 struct ieee80211_mgmt *mgmt;
b9a9ada1 1527 int ies_len;
c56ef672
DS		 1528 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1529 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1530
a806c558
PS		 1531 /*
1532 * Do not send DS Channel parameter for directed probe requests
1533 * in order to maximize the chance that we get a response. Some
1534 * badly-behaved APs don't respond when this parameter is included.
1535 */
2103dec1 1536 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1537 if (directed)
2103dec1 1538 chandef.chan = NULL;
a806c558 1539 else
2103dec1 1540 chandef.chan = chan;
651b5225 1541
a344d677
JB		 1542 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1543 100 + ie_len);
5b2bbf75 1544 if (!skb)
b9a9ada1
JB		 1545 return NULL;
1546
c56ef672 1547 rate_masks[chan->band] = ratemask;
b9a9ada1 1548 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1549 skb_tailroom(skb), &dummy_ie_desc,
1550 ie, ie_len, BIT(chan->band),
1551 rate_masks, &chandef);
b9a9ada1 1552 skb_put(skb, ies_len);
7c12ce8b 1553
46900298 1554 if (dst) {
7c12ce8b 1555 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1556 memcpy(mgmt->da, dst, ETH_ALEN);
1557 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1558 }
46900298 1559
62ae67be 1560 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1561
a619a4c0
JO		 1562 return skb;
1563}
1564
a344d677
JB		 1565void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1566 const u8 *src, const u8 *dst,
a619a4c0 1567 const u8 *ssid, size_t ssid_len,
a806c558 1568 const u8 *ie, size_t ie_len,
1672c0e3 1569 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1570 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1571{
1572 struct sk_buff *skb;
1573
a344d677 1574 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
6b77863b 1575 ssid, ssid_len,
85a237fe 1576 ie, ie_len, directed);
aad14ceb 1577 if (skb) {
1672c0e3 1578 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1579 if (scan)
1580 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1581 else
1582 ieee80211_tx_skb(sdata, skb);
aad14ceb 1583 }
46900298
JB		 1584}
1585
2103dec1 1586u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1587 struct ieee802_11_elems *elems,
9ebb61a2 1588 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1589{
1590 struct ieee80211_supported_band *sband;
46900298 1591 size_t num_rates;
2103dec1
SW		 1592 u32 supp_rates, rate_flags;
1593 int i, j, shift;
1594 sband = sdata->local->hw.wiphy->bands[band];
1595
1596 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1597 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1598
4ee73f33
MK		 1599 if (WARN_ON(!sband))
1600 return 1;
46900298 1601
46900298
JB		 1602 num_rates = sband->n_bitrates;
1603 supp_rates = 0;
1604 for (i = 0; i < elems->supp_rates_len +
1605 elems->ext_supp_rates_len; i++) {
1606 u8 rate = 0;
1607 int own_rate;
9ebb61a2 1608 bool is_basic;
46900298
JB		 1609 if (i < elems->supp_rates_len)
1610 rate = elems->supp_rates[i];
1611 else if (elems->ext_supp_rates)
1612 rate = elems->ext_supp_rates
1613 [i - elems->supp_rates_len];
1614 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1615 is_basic = !!(rate & 0x80);
1616
1617 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1618 continue;
1619
1620 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1621 int brate;
1622 if ((rate_flags & sband->bitrates[j].flags)
1623 != rate_flags)
1624 continue;
1625
1626 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1627 1 << shift);
1628
1629 if (brate == own_rate) {
46900298 1630 supp_rates |= BIT(j);
9ebb61a2
AN		 1631 if (basic_rates && is_basic)
1632 *basic_rates |= BIT(j);
1633 }
1634 }
46900298
JB		 1635 }
1636 return supp_rates;
1637}
f2753ddb 1638
84f6a01c
JB		 1639void ieee80211_stop_device(struct ieee80211_local *local)
1640{
1641 ieee80211_led_radio(local, false);
67408c8c 1642 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1643
1644 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1645
1646 flush_workqueue(local->workqueue);
678f415f 1647 drv_stop(local);
84f6a01c
JB		 1648}
1649
f6837ba8
JB		 1650static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1651{
1652 struct ieee80211_sub_if_data *sdata;
1653 struct ieee80211_chanctx *ctx;
1654
1655 /*
1656 * We get here if during resume the device can't be restarted properly.
1657 * We might also get here if this happens during HW reset, which is a
1658 * slightly different situation and we need to drop all connections in
1659 * the latter case.
1660 *
1661 * Ask cfg80211 to turn off all interfaces, this will result in more
1662 * warnings but at least we'll then get into a clean stopped state.
1663 */
1664
1665 local->resuming = false;
1666 local->suspended = false;
1667 local->started = false;
7584f88f 1668 local->in_reconfig = false;
f6837ba8
JB		 1669
1670 /* scheduled scan clearly can't be running any more, but tell
1671 * cfg80211 and clear local state
1672 */
1673 ieee80211_sched_scan_end(local);
1674
1675 list_for_each_entry(sdata, &local->interfaces, list)
1676 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1677
1678 /* Mark channel contexts as not being in the driver any more to avoid
1679 * removing them from the driver during the shutdown process...
1680 */
1681 mutex_lock(&local->chanctx_mtx);
1682 list_for_each_entry(ctx, &local->chanctx_list, list)
1683 ctx->driver_present = false;
1684 mutex_unlock(&local->chanctx_mtx);
1685
1686 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1687}
1688
153a5fc4
SG		 1689static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1690 struct ieee80211_sub_if_data *sdata)
1691{
1692 struct ieee80211_chanctx_conf *conf;
1693 struct ieee80211_chanctx *ctx;
1694
1695 if (!local->use_chanctx)
1696 return;
1697
1698 mutex_lock(&local->chanctx_mtx);
1699 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1700 lockdep_is_held(&local->chanctx_mtx));
1701 if (conf) {
1702 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1703 drv_assign_vif_chanctx(local, sdata, ctx);
1704 }
1705 mutex_unlock(&local->chanctx_mtx);
1706}
1707
f2753ddb
JB		 1708int ieee80211_reconfig(struct ieee80211_local *local)
1709{
1710 struct ieee80211_hw *hw = &local->hw;
1711 struct ieee80211_sub_if_data *sdata;
55de908a 1712 struct ieee80211_chanctx *ctx;
f2753ddb 1713 struct sta_info *sta;
2683d65b 1714 int res, i;
d888130a 1715 bool reconfig_due_to_wowlan = false;
d43c6b6e 1716 struct ieee80211_sub_if_data *sched_scan_sdata;
6ea0a69c 1717 struct cfg80211_sched_scan_request *sched_scan_req;
d43c6b6e 1718 bool sched_scan_stopped = false;
b0485e9f 1719 bool suspended = local->suspended;
d888130a 1720
0f8b8245
EP		 1721 /* nothing to do if HW shouldn't run */
1722 if (!local->open_count)
1723 goto wake_up;
1724
8f21b0ad 1725#ifdef CONFIG_PM
b0485e9f 1726 if (suspended)
ceb99fe0 1727 local->resuming = true;
f2753ddb 1728
eecc4800 1729 if (local->wowlan) {
b0485e9f
EP		 1730 /*
1731 * In the wowlan case, both mac80211 and the device
1732 * are functional when the resume op is called, so
1733 * clear local->suspended so the device could operate
1734 * normally (e.g. pass rx frames).
1735 */
1736 local->suspended = false;
eecc4800 1737 res = drv_resume(local);
27b3eb9c 1738 local->wowlan = false;
eecc4800
JB		 1739 if (res < 0) {
1740 local->resuming = false;
1741 return res;
1742 }
1743 if (res == 0)
1744 goto wake_up;
1745 WARN_ON(res > 1);
1746 /*
1747 * res is 1, which means the driver requested
1748 * to go through a regular reset on wakeup.
b0485e9f 1749 * restore local->suspended in this case.
eecc4800 1750 */
d888130a 1751 reconfig_due_to_wowlan = true;
b0485e9f 1752 local->suspended = true;
eecc4800
JB		 1753 }
1754#endif
f2753ddb 1755
94f9b97b
JB		 1756 /*
1757 * Upon resume hardware can sometimes be goofy due to
1758 * various platform / driver / bus issues, so restarting
1759 * the device may at times not work immediately. Propagate
1760 * the error.
1761 */
1762 res = drv_start(local);
1763 if (res) {
b0485e9f 1764 if (suspended)
f6837ba8
JB		 1765 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1766 else
1767 WARN(1, "Hardware became unavailable during restart.\n");
1768 ieee80211_handle_reconfig_failure(local);
94f9b97b 1769 return res;
f2753ddb
JB		 1770 }
1771
7f281975
YAP		 1772 /* setup fragmentation threshold */
1773 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1774
1775 /* setup RTS threshold */
1776 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1777
1778 /* reset coverage class */
1779 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1780
94f9b97b
JB		 1781 ieee80211_led_radio(local, true);
1782 ieee80211_mod_tpt_led_trig(local,
1783 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1784
f2753ddb 1785 /* add interfaces */
4b6f1dd6
JB		 1786 sdata = rtnl_dereference(local->monitor_sdata);
1787 if (sdata) {
3c3e21e7
JB		 1788 /* in HW restart it exists already */
1789 WARN_ON(local->resuming);
4b6f1dd6
JB		 1790 res = drv_add_interface(local, sdata);
1791 if (WARN_ON(res)) {
0c2bef46 1792 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1793 synchronize_net();
1794 kfree(sdata);
1795 }
1796 }
1797
f2753ddb
JB		 1798 list_for_each_entry(sdata, &local->interfaces, list) {
1799 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1800 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
c8fff3dc 1801 ieee80211_sdata_running(sdata)) {
7b7eab6f 1802 res = drv_add_interface(local, sdata);
c8fff3dc
LC		 1803 if (WARN_ON(res))
1804 break;
1805 }
1806 }
1807
1808 /* If adding any of the interfaces failed above, roll back and
1809 * report failure.
1810 */
1811 if (res) {
1812 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1813 list)
1814 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1815 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1816 ieee80211_sdata_running(sdata))
1817 drv_remove_interface(local, sdata);
1818 ieee80211_handle_reconfig_failure(local);
1819 return res;
f2753ddb
JB		 1820 }
1821
55de908a 1822 /* add channel contexts */
f0dea9c7
AS		 1823 if (local->use_chanctx) {
1824 mutex_lock(&local->chanctx_mtx);
1825 list_for_each_entry(ctx, &local->chanctx_list, list)
5bcae31d
MK		 1826 if (ctx->replace_state !=
1827 IEEE80211_CHANCTX_REPLACES_OTHER)
1828 WARN_ON(drv_add_chanctx(local, ctx));
f0dea9c7 1829 mutex_unlock(&local->chanctx_mtx);
55de908a 1830
7df180f7
ZG		 1831 list_for_each_entry(sdata, &local->interfaces, list) {
1832 if (!ieee80211_sdata_running(sdata))
1833 continue;
1834 ieee80211_assign_chanctx(local, sdata);
1835 }
6352c87f 1836
7df180f7
ZG		 1837 sdata = rtnl_dereference(local->monitor_sdata);
1838 if (sdata && ieee80211_sdata_running(sdata))
1839 ieee80211_assign_chanctx(local, sdata);
1840 }
fe5f2559 1841
f2753ddb 1842 /* add STAs back */
34e89507
JB		 1843 mutex_lock(&local->sta_mtx);
1844 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1845 enum ieee80211_sta_state state;
f09603a2 1846
2e8d397e
AN		 1847 if (!sta->uploaded)
1848 continue;
1849
1850 /* AP-mode stations will be added later */
1851 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1852 continue;
1853
1854 for (state = IEEE80211_STA_NOTEXIST;
1855 state < sta->sta_state; state++)
1856 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1857 state + 1));
f2753ddb 1858 }
34e89507 1859 mutex_unlock(&local->sta_mtx);
f2753ddb 1860
2683d65b 1861 /* reconfigure tx conf */
54bcbc69
JB		 1862 if (hw->queues >= IEEE80211_NUM_ACS) {
1863 list_for_each_entry(sdata, &local->interfaces, list) {
1864 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1865 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1866 !ieee80211_sdata_running(sdata))
1867 continue;
f6f3def3 1868
54bcbc69
JB		 1869 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1870 drv_conf_tx(local, sdata, i,
1871 &sdata->tx_conf[i]);
1872 }
f6f3def3 1873 }
2683d65b 1874
f2753ddb
JB		 1875 /* reconfigure hardware */
1876 ieee80211_hw_config(local, ~0);
1877
f2753ddb 1878 ieee80211_configure_filter(local);
f2753ddb
JB		 1879
1880 /* Finally also reconfigure all the BSS information */
1881 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1882 u32 changed;
1883
9607e6b6 1884 if (!ieee80211_sdata_running(sdata))
f2753ddb 1885 continue;
ac8dd506
JB		 1886
1887 /* common change flags for all interface types */
1888 changed = BSS_CHANGED_ERP_CTS_PROT |
1889 BSS_CHANGED_ERP_PREAMBLE |
1890 BSS_CHANGED_ERP_SLOT |
1891 BSS_CHANGED_HT |
1892 BSS_CHANGED_BASIC_RATES |
1893 BSS_CHANGED_BEACON_INT |
1894 BSS_CHANGED_BSSID |
4ced3f74 1895 BSS_CHANGED_CQM |
55de47f6 1896 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1897 BSS_CHANGED_IDLE |
1898 BSS_CHANGED_TXPOWER;
ac8dd506 1899
f2753ddb
JB		 1900 switch (sdata->vif.type) {
1901 case NL80211_IFTYPE_STATION:
0d392e93 1902 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1903 BSS_CHANGED_ARP_FILTER |
1904 BSS_CHANGED_PS;
c65dd147 1905
989c6505
AB		 1906 /* Re-send beacon info report to the driver */
1907 if (sdata->u.mgd.have_beacon)
1908 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1909
8d61ffa5 1910 sdata_lock(sdata);
ac8dd506 1911 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1912 sdata_unlock(sdata);
ac8dd506 1913 break;
6e0bd6c3 1914 case NL80211_IFTYPE_OCB:
239281f8
RL		 1915 changed |= BSS_CHANGED_OCB;
1916 ieee80211_bss_info_change_notify(sdata, changed);
6e0bd6c3 1917 break;
f2753ddb 1918 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1919 changed |= BSS_CHANGED_IBSS;
1920 /* fall through */
f2753ddb 1921 case NL80211_IFTYPE_AP:
339afbf4 1922 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1923
1041638f 1924 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1925 changed |= BSS_CHANGED_AP_PROBE_RESP;
1926
1041638f
JB		 1927 if (rcu_access_pointer(sdata->u.ap.beacon))
1928 drv_start_ap(local, sdata);
1929 }
1930
7827493b 1931 /* fall through */
f2753ddb 1932 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1933 if (sdata->vif.bss_conf.enable_beacon) {
1934 changed |= BSS_CHANGED_BEACON |
1935 BSS_CHANGED_BEACON_ENABLED;
1936 ieee80211_bss_info_change_notify(sdata, changed);
1937 }
f2753ddb
JB		 1938 break;
1939 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1940 case NL80211_IFTYPE_AP_VLAN:
1941 case NL80211_IFTYPE_MONITOR:
98104fde 1942 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1943 /* nothing to do */
f142c6b9 1944 break;
f2753ddb 1945 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1946 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1947 case NL80211_IFTYPE_P2P_CLIENT:
1948 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1949 WARN_ON(1);
1950 break;
1951 }
1952 }
1953
8e1b23b9
ES		 1954 ieee80211_recalc_ps(local, -1);
1955
6e1b1b24
EP		 1956 /*
1957 * The sta might be in psm against the ap (e.g. because
1958 * this was the state before a hw restart), so we
1959 * explicitly send a null packet in order to make sure
1960 * it'll sync against the ap (and get out of psm).
1961 */
1962 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1963 list_for_each_entry(sdata, &local->interfaces, list) {
1964 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1965 continue;
20f544ee
JB		 1966 if (!sdata->u.mgd.associated)
1967 continue;
6e1b1b24
EP		 1968
1969 ieee80211_send_nullfunc(local, sdata, 0);
1970 }
1971 }
1972
2e8d397e
AN		 1973 /* APs are now beaconing, add back stations */
1974 mutex_lock(&local->sta_mtx);
1975 list_for_each_entry(sta, &local->sta_list, list) {
1976 enum ieee80211_sta_state state;
1977
1978 if (!sta->uploaded)
1979 continue;
1980
1981 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1982 continue;
1983
1984 for (state = IEEE80211_STA_NOTEXIST;
1985 state < sta->sta_state; state++)
1986 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1987 state + 1));
1988 }
1989 mutex_unlock(&local->sta_mtx);
1990
7b21aea0 1991 /* add back keys */
f9dca80b
MK		 1992 list_for_each_entry(sdata, &local->interfaces, list)
1993 ieee80211_reset_crypto_tx_tailroom(sdata);
1994
7b21aea0
ES		 1995 list_for_each_entry(sdata, &local->interfaces, list)
1996 if (ieee80211_sdata_running(sdata))
1997 ieee80211_enable_keys(sdata);
1998
c6209488 1999 wake_up:
04800ada
AN		 2000 local->in_reconfig = false;
2001 barrier();
2002
3c3e21e7
JB		 2003 if (local->monitors == local->open_count && local->monitors > 0)
2004 ieee80211_add_virtual_monitor(local);
2005
2a419056
JB		 2006 /*
2007 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2008 * sessions can be established after a resume.
2009 *
2010 * Also tear down aggregation sessions since reconfiguring
2011 * them in a hardware restart scenario is not easily done
2012 * right now, and the hardware will have lost information
2013 * about the sessions, but we and the AP still think they
2014 * are active. This is really a workaround though.
2015 */
30686bf7 2016 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2a419056
JB		 2017 mutex_lock(&local->sta_mtx);
2018
2019 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 2020 ieee80211_sta_tear_down_BA_sessions(
2021 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 2022 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 2023 }
2a419056
JB		 2024
2025 mutex_unlock(&local->sta_mtx);
74e2bd1f 2026 }
74e2bd1f 2027
445ea4e8 2028 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 2029 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2030 false);
f2753ddb 2031
32769814
AN		 2032 /*
2033 * Reconfigure sched scan if it was interrupted by FW restart or
2034 * suspend.
2035 */
2036 mutex_lock(&local->mtx);
2037 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2038 lockdep_is_held(&local->mtx));
6ea0a69c
JB		 2039 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2040 lockdep_is_held(&local->mtx));
2041 if (sched_scan_sdata && sched_scan_req)
32769814
AN		 2042 /*
2043 * Sched scan stopped, but we don't want to report it. Instead,
2044 * we're trying to reschedule.
2045 */
2046 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
6ea0a69c 2047 sched_scan_req))
32769814
AN		 2048 sched_scan_stopped = true;
2049 mutex_unlock(&local->mtx);
2050
2051 if (sched_scan_stopped)
e669ba2d 2052 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 2053
5bb644a0
JB		 2054 /*
2055 * If this is for hw restart things are still running.
2056 * We may want to change that later, however.
2057 */
b0485e9f 2058 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
cf2c92d8 2059 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
8f21b0ad 2060
b0485e9f 2061 if (!suspended)
5bb644a0
JB		 2062 return 0;
2063
2064#ifdef CONFIG_PM
ceb99fe0 2065 /* first set suspended false, then resuming */
5bb644a0 2066 local->suspended = false;
ceb99fe0
JB		 2067 mb();
2068 local->resuming = false;
5bb644a0 2069
9120d94e
LC		 2070 /* It's possible that we don't handle the scan completion in
2071 * time during suspend, so if it's still marked as completed
2072 * here, queue the work and flush it to clean things up.
2073 * Instead of calling the worker function directly here, we
2074 * really queue it to avoid potential races with other flows
2075 * scheduling the same work.
2076 */
2077 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2078 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2079 flush_delayed_work(&local->scan_work);
2080 }
2081
0f8b8245 2082 if (local->open_count && !reconfig_due_to_wowlan)
cf2c92d8
EP		 2083 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2084
b8360ab8
JB		 2085 list_for_each_entry(sdata, &local->interfaces, list) {
2086 if (!ieee80211_sdata_running(sdata))
2087 continue;
2088 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2089 ieee80211_sta_restart(sdata);
2090 }
2091
26d59535 2092 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 2093#else
2094 WARN_ON(1);
2095#endif
d43c6b6e 2096
f2753ddb
JB		 2097 return 0;
2098}
42935eca 2099
95acac61
JB		 2100void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2101{
2102 struct ieee80211_sub_if_data *sdata;
2103 struct ieee80211_local *local;
2104 struct ieee80211_key *key;
2105
2106 if (WARN_ON(!vif))
2107 return;
2108
2109 sdata = vif_to_sdata(vif);
2110 local = sdata->local;
2111
2112 if (WARN_ON(!local->resuming))
2113 return;
2114
2115 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2116 return;
2117
2118 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2119
2120 mutex_lock(&local->key_mtx);
2121 list_for_each_entry(key, &sdata->key_list, list)
2122 key->flags |= KEY_FLAG_TAINTED;
2123 mutex_unlock(&local->key_mtx);
2124}
2125EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2126
04ecd257 2127void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 2128{
04ecd257
JB		 2129 struct ieee80211_local *local = sdata->local;
2130 struct ieee80211_chanctx_conf *chanctx_conf;
2131 struct ieee80211_chanctx *chanctx;
025e6be2 2132
04ecd257 2133 mutex_lock(&local->chanctx_mtx);
0f78231b 2134
04ecd257
JB		 2135 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2136 lockdep_is_held(&local->chanctx_mtx));
0f78231b 2137
04ecd257 2138 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 2139 goto unlock;
0f78231b 2140
04ecd257
JB		 2141 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2142 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 2143 unlock:
04ecd257 2144 mutex_unlock(&local->chanctx_mtx);
0f78231b 2145}
8e664fb3 2146
21f659bf
EP		 2147void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2148{
2149 struct ieee80211_local *local = sdata->local;
2150 struct ieee80211_chanctx_conf *chanctx_conf;
2151 struct ieee80211_chanctx *chanctx;
2152
2153 mutex_lock(&local->chanctx_mtx);
2154
2155 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2156 lockdep_is_held(&local->chanctx_mtx));
2157
2158 if (WARN_ON_ONCE(!chanctx_conf))
2159 goto unlock;
2160
2161 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2162 ieee80211_recalc_chanctx_min_def(local, chanctx);
2163 unlock:
2164 mutex_unlock(&local->chanctx_mtx);
2165}
2166
8e664fb3
JB		 2167size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2168{
2169 size_t pos = offset;
2170
2171 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2172 pos += 2 + ies[pos + 1];
2173
2174 return pos;
2175}
615f7b9b
MV		 2176
2177static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2178 int rssi_min_thold,
2179 int rssi_max_thold)
2180{
2181 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2182
2183 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2184 return;
2185
2186 /*
2187 * Scale up threshold values before storing it, as the RSSI averaging
2188 * algorithm uses a scaled up value as well. Change this scaling
2189 * factor if the RSSI averaging algorithm changes.
2190 */
2191 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2192 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2193}
2194
2195void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2196 int rssi_min_thold,
2197 int rssi_max_thold)
2198{
2199 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2200
2201 WARN_ON(rssi_min_thold == rssi_max_thold ||
2202 rssi_min_thold > rssi_max_thold);
2203
2204 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2205 rssi_max_thold);
2206}
2207EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2208
2209void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2210{
2211 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2212
2213 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2214}
2215EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2216
ef96a842 2217u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2218 u16 cap)
2219{
2220 __le16 tmp;
2221
2222 *pos++ = WLAN_EID_HT_CAPABILITY;
2223 *pos++ = sizeof(struct ieee80211_ht_cap);
2224 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2225
2226 /* capability flags */
2227 tmp = cpu_to_le16(cap);
2228 memcpy(pos, &tmp, sizeof(u16));
2229 pos += sizeof(u16);
2230
2231 /* AMPDU parameters */
ef96a842
BG		 2232 *pos++ = ht_cap->ampdu_factor |
2233 (ht_cap->ampdu_density <<
42e7aa77
AS		 2234 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2235
2236 /* MCS set */
ef96a842
BG		 2237 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2238 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2239
2240 /* extended capabilities */
2241 pos += sizeof(__le16);
2242
2243 /* BF capabilities */
2244 pos += sizeof(__le32);
2245
2246 /* antenna selection */
2247 pos += sizeof(u8);
2248
2249 return pos;
2250}
2251
ba0afa2f 2252u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2253 u32 cap)
ba0afa2f
MP		 2254{
2255 __le32 tmp;
2256
2257 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2258 *pos++ = sizeof(struct ieee80211_vht_cap);
2259 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2260
2261 /* capability flags */
2262 tmp = cpu_to_le32(cap);
2263 memcpy(pos, &tmp, sizeof(u32));
2264 pos += sizeof(u32);
2265
2266 /* VHT MCS set */
2267 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2268 pos += sizeof(vht_cap->vht_mcs);
2269
2270 return pos;
2271}
2272
074d46d1 2273u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2274 const struct cfg80211_chan_def *chandef,
431e3154 2275 u16 prot_mode)
42e7aa77 2276{
074d46d1 2277 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2278 /* Build HT Information */
074d46d1
JB		 2279 *pos++ = WLAN_EID_HT_OPERATION;
2280 *pos++ = sizeof(struct ieee80211_ht_operation);
2281 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2282 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2283 chandef->chan->center_freq);
2284 switch (chandef->width) {
2285 case NL80211_CHAN_WIDTH_160:
2286 case NL80211_CHAN_WIDTH_80P80:
2287 case NL80211_CHAN_WIDTH_80:
2288 case NL80211_CHAN_WIDTH_40:
2289 if (chandef->center_freq1 > chandef->chan->center_freq)
2290 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2291 else
2292 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2293 break;
42e7aa77 2294 default:
074d46d1 2295 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2296 break;
2297 }
aee286c2 2298 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2299 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2300 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2301 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2302
431e3154 2303 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2304 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2305
2306 /* It seems that Basic MCS set and Supported MCS set
2307 are identical for the first 10 bytes */
074d46d1
JB		 2308 memset(&ht_oper->basic_set, 0, 16);
2309 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2310
074d46d1 2311 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2312}
2313
fb28ec0c
AN		 2314u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2315 const struct cfg80211_chan_def *chandef)
2316{
2317 struct ieee80211_vht_operation *vht_oper;
2318
2319 *pos++ = WLAN_EID_VHT_OPERATION;
2320 *pos++ = sizeof(struct ieee80211_vht_operation);
2321 vht_oper = (struct ieee80211_vht_operation *)pos;
2322 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2323 chandef->center_freq1);
2324 if (chandef->center_freq2)
2325 vht_oper->center_freq_seg2_idx =
2326 ieee80211_frequency_to_channel(chandef->center_freq2);
2327
2328 switch (chandef->width) {
2329 case NL80211_CHAN_WIDTH_160:
2330 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2331 break;
2332 case NL80211_CHAN_WIDTH_80P80:
2333 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2334 break;
2335 case NL80211_CHAN_WIDTH_80:
2336 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2337 break;
2338 default:
2339 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2340 break;
2341 }
2342
2343 /* don't require special VHT peer rates */
2344 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2345
2346 return pos + sizeof(struct ieee80211_vht_operation);
2347}
2348
4bf88530 2349void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2350 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2351 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2352{
2353 enum nl80211_channel_type channel_type;
2354
4bf88530
JB		 2355 if (!ht_oper) {
2356 cfg80211_chandef_create(chandef, control_chan,
2357 NL80211_CHAN_NO_HT);
2358 return;
2359 }
42e7aa77 2360
074d46d1 2361 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2362 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2363 channel_type = NL80211_CHAN_HT20;
2364 break;
2365 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2366 channel_type = NL80211_CHAN_HT40PLUS;
2367 break;
2368 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2369 channel_type = NL80211_CHAN_HT40MINUS;
2370 break;
2371 default:
2372 channel_type = NL80211_CHAN_NO_HT;
2373 }
2374
4bf88530 2375 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2376}
2377
abcff6ef
JD		 2378void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2379 const struct ieee80211_vht_operation *oper,
2380 struct cfg80211_chan_def *chandef)
2381{
2382 if (!oper)
2383 return;
2384
2385 chandef->chan = control_chan;
2386
2387 switch (oper->chan_width) {
2388 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2389 break;
2390 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2391 chandef->width = NL80211_CHAN_WIDTH_80;
2392 break;
2393 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2394 chandef->width = NL80211_CHAN_WIDTH_160;
2395 break;
2396 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2397 chandef->width = NL80211_CHAN_WIDTH_80P80;
2398 break;
2399 default:
2400 break;
2401 }
2402
2403 chandef->center_freq1 =
2404 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2405 control_chan->band);
2406 chandef->center_freq2 =
2407 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2408 control_chan->band);
2409}
2410
2103dec1
SW		 2411int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2412 const struct ieee80211_supported_band *sband,
2413 const u8 *srates, int srates_len, u32 *rates)
2414{
2415 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2416 int shift = ieee80211_chandef_get_shift(chandef);
2417 struct ieee80211_rate *br;
2418 int brate, rate, i, j, count = 0;
2419
2420 *rates = 0;
2421
2422 for (i = 0; i < srates_len; i++) {
2423 rate = srates[i] & 0x7f;
2424
2425 for (j = 0; j < sband->n_bitrates; j++) {
2426 br = &sband->bitrates[j];
2427 if ((rate_flags & br->flags) != rate_flags)
2428 continue;
2429
2430 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2431 if (brate == rate) {
2432 *rates |= BIT(j);
2433 count++;
2434 break;
2435 }
2436 }
2437 }
2438 return count;
2439}
2440
fc8a7321 2441int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2442 struct sk_buff *skb, bool need_basic,
2443 enum ieee80211_band band)
768db343 2444{
768db343
AN		 2445 struct ieee80211_local *local = sdata->local;
2446 struct ieee80211_supported_band *sband;
2103dec1 2447 int rate, shift;
768db343 2448 u8 i, rates, *pos;
fc8a7321 2449 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2450 u32 rate_flags;
768db343 2451
2103dec1
SW		 2452 shift = ieee80211_vif_get_shift(&sdata->vif);
2453 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2454 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2455 rates = 0;
2456 for (i = 0; i < sband->n_bitrates; i++) {
2457 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2458 continue;
2459 rates++;
2460 }
768db343
AN		 2461 if (rates > 8)
2462 rates = 8;
2463
2464 if (skb_tailroom(skb) < rates + 2)
2465 return -ENOMEM;
2466
2467 pos = skb_put(skb, rates + 2);
2468 *pos++ = WLAN_EID_SUPP_RATES;
2469 *pos++ = rates;
2470 for (i = 0; i < rates; i++) {
657c3e0c 2471 u8 basic = 0;
2103dec1
SW		 2472 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2473 continue;
2474
657c3e0c
AN		 2475 if (need_basic && basic_rates & BIT(i))
2476 basic = 0x80;
768db343 2477 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2478 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2479 5 * (1 << shift));
2480 *pos++ = basic | (u8) rate;
768db343
AN		 2481 }
2482
2483 return 0;
2484}
2485
fc8a7321 2486int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2487 struct sk_buff *skb, bool need_basic,
2488 enum ieee80211_band band)
768db343 2489{
768db343
AN		 2490 struct ieee80211_local *local = sdata->local;
2491 struct ieee80211_supported_band *sband;
cc63ec76 2492 int rate, shift;
768db343 2493 u8 i, exrates, *pos;
fc8a7321 2494 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2495 u32 rate_flags;
2496
2497 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2498 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2499
6b77863b 2500 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2501 exrates = 0;
2502 for (i = 0; i < sband->n_bitrates; i++) {
2503 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2504 continue;
2505 exrates++;
2506 }
2507
768db343
AN		 2508 if (exrates > 8)
2509 exrates -= 8;
2510 else
2511 exrates = 0;
2512
2513 if (skb_tailroom(skb) < exrates + 2)
2514 return -ENOMEM;
2515
2516 if (exrates) {
2517 pos = skb_put(skb, exrates + 2);
2518 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2519 *pos++ = exrates;
2520 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2521 u8 basic = 0;
2103dec1
SW		 2522 if ((rate_flags & sband->bitrates[i].flags)
2523 != rate_flags)
2524 continue;
657c3e0c
AN		 2525 if (need_basic && basic_rates & BIT(i))
2526 basic = 0x80;
2103dec1
SW		 2527 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2528 5 * (1 << shift));
2529 *pos++ = basic | (u8) rate;
768db343
AN		 2530 }
2531 }
2532 return 0;
2533}
1dae27f8
WYG		 2534
2535int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2536{
2537 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2539
be6bcabc
WYG		 2540 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2541 /* non-managed type inferfaces */
2542 return 0;
2543 }
3a7bba64 2544 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2545}
0d8a0a17 2546EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2547
2548u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2549{
2550 if (!mcs)
2551 return 1;
2552
2553 /* TODO: consider rx_highest */
2554
2555 if (mcs->rx_mask[3])
2556 return 4;
2557 if (mcs->rx_mask[2])
2558 return 3;
2559 if (mcs->rx_mask[1])
2560 return 2;
2561 return 1;
2562}
f4bda337
TP		 2563
2564/**
2565 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2566 * @local: mac80211 hw info struct
2567 * @status: RX status
2568 * @mpdu_len: total MPDU length (including FCS)
2569 * @mpdu_offset: offset into MPDU to calculate timestamp at
2570 *
2571 * This function calculates the RX timestamp at the given MPDU offset, taking
2572 * into account what the RX timestamp was. An offset of 0 will just normalize
2573 * the timestamp to TSF at beginning of MPDU reception.
2574 */
2575u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2576 struct ieee80211_rx_status *status,
2577 unsigned int mpdu_len,
2578 unsigned int mpdu_offset)
2579{
2580 u64 ts = status->mactime;
2581 struct rate_info ri;
2582 u16 rate;
2583
2584 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2585 return 0;
2586
2587 memset(&ri, 0, sizeof(ri));
2588
2589 /* Fill cfg80211 rate info */
2590 if (status->flag & RX_FLAG_HT) {
2591 ri.mcs = status->rate_idx;
2592 ri.flags |= RATE_INFO_FLAGS_MCS;
2593 if (status->flag & RX_FLAG_40MHZ)
b51f3bee
JB		 2594 ri.bw = RATE_INFO_BW_40;
2595 else
2596 ri.bw = RATE_INFO_BW_20;
f4bda337
TP		 2597 if (status->flag & RX_FLAG_SHORT_GI)
2598 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2599 } else if (status->flag & RX_FLAG_VHT) {
2600 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2601 ri.mcs = status->rate_idx;
2602 ri.nss = status->vht_nss;
2603 if (status->flag & RX_FLAG_40MHZ)
b51f3bee
JB		 2604 ri.bw = RATE_INFO_BW_40;
2605 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2606 ri.bw = RATE_INFO_BW_80;
2607 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2608 ri.bw = RATE_INFO_BW_160;
2609 else
2610 ri.bw = RATE_INFO_BW_20;
5614618e
JB		 2611 if (status->flag & RX_FLAG_SHORT_GI)
2612 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2613 } else {
2614 struct ieee80211_supported_band *sband;
2103dec1
SW		 2615 int shift = 0;
2616 int bitrate;
2617
b51f3bee 2618 if (status->flag & RX_FLAG_10MHZ) {
2103dec1 2619 shift = 1;
b51f3bee
JB		 2620 ri.bw = RATE_INFO_BW_10;
2621 } else if (status->flag & RX_FLAG_5MHZ) {
2103dec1 2622 shift = 2;
b51f3bee
JB		 2623 ri.bw = RATE_INFO_BW_5;
2624 } else {
2625 ri.bw = RATE_INFO_BW_20;
2626 }
f4bda337
TP		 2627
2628 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2629 bitrate = sband->bitrates[status->rate_idx].bitrate;
2630 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2631 }
2632
2633 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2634 if (WARN_ONCE(!rate,
2635 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2636 status->flag, status->rate_idx, status->vht_nss))
2637 return 0;
f4bda337
TP		 2638
2639 /* rewind from end of MPDU */
2640 if (status->flag & RX_FLAG_MACTIME_END)
2641 ts -= mpdu_len * 8 * 10 / rate;
2642
2643 ts += mpdu_offset * 8 * 10 / rate;
2644
2645 return ts;
2646}
164eb02d
SW		 2647
2648void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2649{
2650 struct ieee80211_sub_if_data *sdata;
d2859df5 2651 struct cfg80211_chan_def chandef;
164eb02d 2652
34a3740d 2653 mutex_lock(&local->mtx);
164eb02d
SW		 2654 mutex_lock(&local->iflist_mtx);
2655 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2656 /* it might be waiting for the local->mtx, but then
2657 * by the time it gets it, sdata->wdev.cac_started
2658 * will no longer be true
2659 */
2660 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2661
2662 if (sdata->wdev.cac_started) {
d2859df5 2663 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2664 ieee80211_vif_release_channel(sdata);
2665 cfg80211_cac_event(sdata->dev,
d2859df5 2666 &chandef,
164eb02d
SW		 2667 NL80211_RADAR_CAC_ABORTED,
2668 GFP_KERNEL);
2669 }
2670 }
2671 mutex_unlock(&local->iflist_mtx);
34a3740d 2672 mutex_unlock(&local->mtx);
164eb02d
SW		 2673}
2674
2675void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2676{
2677 struct ieee80211_local *local =
2678 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2679 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
486cf4c0
MK		 2680 struct ieee80211_chanctx *ctx;
2681 int num_chanctx = 0;
2682
2683 mutex_lock(&local->chanctx_mtx);
2684 list_for_each_entry(ctx, &local->chanctx_list, list) {
2685 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2686 continue;
2687
2688 num_chanctx++;
2689 chandef = ctx->conf.def;
2690 }
2691 mutex_unlock(&local->chanctx_mtx);
164eb02d
SW		 2692
2693 ieee80211_dfs_cac_cancel(local);
2694
486cf4c0
MK		 2695 if (num_chanctx > 1)
2696 /* XXX: multi-channel is not supported yet */
164eb02d 2697 WARN_ON(1);
84a3d1c9 2698 else
164eb02d 2699 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2700}
2701
2702void ieee80211_radar_detected(struct ieee80211_hw *hw)
2703{
2704 struct ieee80211_local *local = hw_to_local(hw);
2705
2706 trace_api_radar_detected(local);
2707
2708 ieee80211_queue_work(hw, &local->radar_detected_work);
2709}
2710EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2711
2712u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2713{
2714 u32 ret;
2715 int tmp;
2716
2717 switch (c->width) {
2718 case NL80211_CHAN_WIDTH_20:
2719 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2720 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2721 break;
2722 case NL80211_CHAN_WIDTH_40:
2723 c->width = NL80211_CHAN_WIDTH_20;
2724 c->center_freq1 = c->chan->center_freq;
2725 ret = IEEE80211_STA_DISABLE_40MHZ |
2726 IEEE80211_STA_DISABLE_VHT;
2727 break;
2728 case NL80211_CHAN_WIDTH_80:
2729 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2730 /* n_P40 */
2731 tmp /= 2;
2732 /* freq_P40 */
2733 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2734 c->width = NL80211_CHAN_WIDTH_40;
2735 ret = IEEE80211_STA_DISABLE_VHT;
2736 break;
2737 case NL80211_CHAN_WIDTH_80P80:
2738 c->center_freq2 = 0;
2739 c->width = NL80211_CHAN_WIDTH_80;
2740 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2741 IEEE80211_STA_DISABLE_160MHZ;
2742 break;
2743 case NL80211_CHAN_WIDTH_160:
2744 /* n_P20 */
2745 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2746 /* n_P80 */
2747 tmp /= 4;
2748 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2749 c->width = NL80211_CHAN_WIDTH_80;
2750 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2751 IEEE80211_STA_DISABLE_160MHZ;
2752 break;
2753 default:
2754 case NL80211_CHAN_WIDTH_20_NOHT:
2755 WARN_ON_ONCE(1);
2756 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2757 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2758 break;
2759 case NL80211_CHAN_WIDTH_5:
2760 case NL80211_CHAN_WIDTH_10:
2761 WARN_ON_ONCE(1);
2762 /* keep c->width */
2763 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2764 break;
2765 }
2766
2767 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2768
2769 return ret;
2770}
687da132
EG		 2771
2772/*
2773 * Returns true if smps_mode_new is strictly more restrictive than
2774 * smps_mode_old.
2775 */
2776bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2777 enum ieee80211_smps_mode smps_mode_new)
2778{
2779 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2780 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2781 return false;
2782
2783 switch (smps_mode_old) {
2784 case IEEE80211_SMPS_STATIC:
2785 return false;
2786 case IEEE80211_SMPS_DYNAMIC:
2787 return smps_mode_new == IEEE80211_SMPS_STATIC;
2788 case IEEE80211_SMPS_OFF:
2789 return smps_mode_new != IEEE80211_SMPS_OFF;
2790 default:
2791 WARN_ON(1);
2792 }
2793
2794 return false;
2795}
c6da674a
CYY		 2796
2797int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2798 struct cfg80211_csa_settings *csa_settings)
2799{
2800 struct sk_buff *skb;
2801 struct ieee80211_mgmt *mgmt;
2802 struct ieee80211_local *local = sdata->local;
2803 int freq;
2804 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2805 sizeof(mgmt->u.action.u.chan_switch);
2806 u8 *pos;
2807
2808 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2809 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2810 return -EOPNOTSUPP;
2811
2812 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2813 5 + /* channel switch announcement element */
2814 3 + /* secondary channel offset element */
2815 8); /* mesh channel switch parameters element */
2816 if (!skb)
2817 return -ENOMEM;
2818
2819 skb_reserve(skb, local->tx_headroom);
2820 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2821 memset(mgmt, 0, hdr_len);
2822 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2823 IEEE80211_STYPE_ACTION);
2824
2825 eth_broadcast_addr(mgmt->da);
2826 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2827 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2828 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2829 } else {
2830 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2831 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2832 }
2833 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2834 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2835 pos = skb_put(skb, 5);
2836 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2837 *pos++ = 3; /* IE length */
2838 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2839 freq = csa_settings->chandef.chan->center_freq;
2840 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2841 *pos++ = csa_settings->count; /* count */
2842
2843 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2844 enum nl80211_channel_type ch_type;
2845
2846 skb_put(skb, 3);
2847 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2848 *pos++ = 1; /* IE length */
2849 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2850 if (ch_type == NL80211_CHAN_HT40PLUS)
2851 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2852 else
2853 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2854 }
2855
2856 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2857 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2858
2859 skb_put(skb, 8);
2860 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2861 *pos++ = 6; /* IE length */
2862 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2863 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2864 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2865 *pos++ |= csa_settings->block_tx ?
2866 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2867 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2868 pos += 2;
ca91dc97 2869 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2870 pos += 2;
c6da674a
CYY		 2871 }
2872
2873 ieee80211_tx_skb(sdata, skb);
2874 return 0;
2875}
2475b1cc
MS		 2876
2877bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2878{
2879 return !(cs == NULL || cs->cipher == 0 ||
2880 cs->hdr_len < cs->pn_len + cs->pn_off ||
2881 cs->hdr_len <= cs->key_idx_off ||
2882 cs->key_idx_shift > 7 ||
2883 cs->key_idx_mask == 0);
2884}
2885
2886bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2887{
2888 int i;
2889
2890 /* Ensure we have enough iftype bitmap space for all iftype values */
2891 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2892
2893 for (i = 0; i < n; i++)
2894 if (!ieee80211_cs_valid(&cs[i]))
2895 return false;
2896
2897 return true;
2898}
2899
2900const struct ieee80211_cipher_scheme *
2901ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2902 enum nl80211_iftype iftype)
2903{
2904 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2905 int n = local->hw.n_cipher_schemes;
2906 int i;
2907 const struct ieee80211_cipher_scheme *cs = NULL;
2908
2909 for (i = 0; i < n; i++) {
2910 if (l[i].cipher == cipher) {
2911 cs = &l[i];
2912 break;
2913 }
2914 }
2915
2916 if (!cs || !(cs->iftype & BIT(iftype)))
2917 return NULL;
2918
2919 return cs;
2920}
2921
2922int ieee80211_cs_headroom(struct ieee80211_local *local,
2923 struct cfg80211_crypto_settings *crypto,
2924 enum nl80211_iftype iftype)
2925{
2926 const struct ieee80211_cipher_scheme *cs;
2927 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2928 int i;
2929
2930 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2931 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2932 iftype);
2933
2934 if (cs && headroom < cs->hdr_len)
2935 headroom = cs->hdr_len;
2936 }
2937
2938 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2939 if (cs && headroom < cs->hdr_len)
2940 headroom = cs->hdr_len;
2941
2942 return headroom;
2943}
a7022e65
FF		 2944
2945static bool
2946ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2947{
2948 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2949 int skip;
2950
2951 if (end > 0)
2952 return false;
2953
2954 /* End time is in the past, check for repetitions */
2955 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2956 if (data->count[i] < 255) {
2957 if (data->count[i] <= skip) {
2958 data->count[i] = 0;
2959 return false;
2960 }
2961
2962 data->count[i] -= skip;
2963 }
2964
2965 data->desc[i].start += skip * data->desc[i].interval;
2966
2967 return true;
2968}
2969
2970static bool
2971ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2972 s32 *offset)
2973{
2974 bool ret = false;
2975 int i;
2976
2977 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2978 s32 cur;
2979
2980 if (!data->count[i])
2981 continue;
2982
2983 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2984 ret = true;
2985
2986 cur = data->desc[i].start - tsf;
2987 if (cur > *offset)
2988 continue;
2989
2990 cur = data->desc[i].start + data->desc[i].duration - tsf;
2991 if (cur > *offset)
2992 *offset = cur;
2993 }
2994
2995 return ret;
2996}
2997
2998static u32
2999ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3000{
3001 s32 offset = 0;
3002 int tries = 0;
3003 /*
3004 * arbitrary limit, used to avoid infinite loops when combined NoA
3005 * descriptors cover the full time period.
3006 */
3007 int max_tries = 5;
3008
3009 ieee80211_extend_absent_time(data, tsf, &offset);
3010 do {
3011 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3012 break;
3013
3014 tries++;
3015 } while (tries < max_tries);
3016
3017 return offset;
3018}
3019
3020void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3021{
3022 u32 next_offset = BIT(31) - 1;
3023 int i;
3024
3025 data->absent = 0;
3026 data->has_next_tsf = false;
3027 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3028 s32 start;
3029
3030 if (!data->count[i])
3031 continue;
3032
3033 ieee80211_extend_noa_desc(data, tsf, i);
3034 start = data->desc[i].start - tsf;
3035 if (start <= 0)
3036 data->absent |= BIT(i);
3037
3038 if (next_offset > start)
3039 next_offset = start;
3040
3041 data->has_next_tsf = true;
3042 }
3043
3044 if (data->absent)
3045 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3046
3047 data->next_tsf = tsf + next_offset;
3048}
3049EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3050
3051int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3052 struct ieee80211_noa_data *data, u32 tsf)
3053{
3054 int ret = 0;
3055 int i;
3056
3057 memset(data, 0, sizeof(*data));
3058
3059 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3060 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3061
3062 if (!desc->count || !desc->duration)
3063 continue;
3064
3065 data->count[i] = desc->count;
3066 data->desc[i].start = le32_to_cpu(desc->start_time);
3067 data->desc[i].duration = le32_to_cpu(desc->duration);
3068 data->desc[i].interval = le32_to_cpu(desc->interval);
3069
3070 if (data->count[i] > 1 &&
3071 data->desc[i].interval < data->desc[i].duration)
3072 continue;
3073
3074 ieee80211_extend_noa_desc(data, tsf, i);
3075 ret++;
3076 }
3077
3078 if (ret)
3079 ieee80211_update_p2p_noa(data, tsf);
3080
3081 return ret;
3082}
3083EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 3084
3085void ieee80211_recalc_dtim(struct ieee80211_local *local,
3086 struct ieee80211_sub_if_data *sdata)
3087{
3088 u64 tsf = drv_get_tsf(local, sdata);
3089 u64 dtim_count = 0;
3090 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3091 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3092 struct ps_data *ps;
3093 u8 bcns_from_dtim;
3094
3095 if (tsf == -1ULL || !beacon_int || !dtim_period)
3096 return;
3097
3098 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3099 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3100 if (!sdata->bss)
3101 return;
3102
3103 ps = &sdata->bss->ps;
3104 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3105 ps = &sdata->u.mesh.ps;
3106 } else {
3107 return;
3108 }
3109
3110 /*
3111 * actually finds last dtim_count, mac80211 will update in
3112 * __beacon_add_tim().
3113 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3114 */
3115 do_div(tsf, beacon_int);
3116 bcns_from_dtim = do_div(tsf, dtim_period);
3117 /* just had a DTIM */
3118 if (!bcns_from_dtim)
3119 dtim_count = 0;
3120 else
3121 dtim_count = dtim_period - bcns_from_dtim;
3122
3123 ps->dtim_count = dtim_count;
3124}
73de86a3 3125
71e6195e
MK		 3126static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3127 struct ieee80211_chanctx *ctx)
3128{
3129 struct ieee80211_sub_if_data *sdata;
3130 u8 radar_detect = 0;
3131
3132 lockdep_assert_held(&local->chanctx_mtx);
3133
3134 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3135 return 0;
3136
3137 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3138 if (sdata->reserved_radar_required)
3139 radar_detect |= BIT(sdata->reserved_chandef.width);
3140
3141 /*
3142 * An in-place reservation context should not have any assigned vifs
3143 * until it replaces the other context.
3144 */
3145 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3146 !list_empty(&ctx->assigned_vifs));
3147
3148 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3149 if (sdata->radar_required)
3150 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3151
3152 return radar_detect;
3153}
3154
73de86a3
LC		 3155int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3156 const struct cfg80211_chan_def *chandef,
3157 enum ieee80211_chanctx_mode chanmode,
3158 u8 radar_detect)
3159{
3160 struct ieee80211_local *local = sdata->local;
3161 struct ieee80211_sub_if_data *sdata_iter;
3162 enum nl80211_iftype iftype = sdata->wdev.iftype;
3163 int num[NUM_NL80211_IFTYPES];
3164 struct ieee80211_chanctx *ctx;
b6a55015 3165 int num_different_channels = 0;
73de86a3
LC		 3166 int total = 1;
3167
3168 lockdep_assert_held(&local->chanctx_mtx);
3169
3170 if (WARN_ON(hweight32(radar_detect) > 1))
3171 return -EINVAL;
3172
b6a55015
LC		 3173 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3174 !chandef->chan))
73de86a3
LC		 3175 return -EINVAL;
3176
b6a55015
LC		 3177 if (chandef)
3178 num_different_channels = 1;
3179
73de86a3
LC		 3180 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3181 return -EINVAL;
3182
3183 /* Always allow software iftypes */
3184 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3185 if (radar_detect)
3186 return -EINVAL;
3187 return 0;
3188 }
3189
3190 memset(num, 0, sizeof(num));
3191
3192 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3193 num[iftype] = 1;
3194
3195 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3196 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3197 continue;
71e6195e 3198 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
73de86a3
LC		 3199 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3200 num_different_channels++;
3201 continue;
3202 }
b6a55015 3203 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 3204 cfg80211_chandef_compatible(chandef,
3205 &ctx->conf.def))
3206 continue;
3207 num_different_channels++;
3208 }
3209
3210 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3211 struct wireless_dev *wdev_iter;
3212
3213 wdev_iter = &sdata_iter->wdev;
3214
3215 if (sdata_iter == sdata ||
0f611d28 3216 !ieee80211_sdata_running(sdata_iter) ||
73de86a3
LC		 3217 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3218 continue;
3219
3220 num[wdev_iter->iftype]++;
3221 total++;
3222 }
3223
3224 if (total == 1 && !radar_detect)
3225 return 0;
3226
3227 return cfg80211_check_combinations(local->hw.wiphy,
3228 num_different_channels,
3229 radar_detect, num);
3230}
6fa001bc
MK		 3231
3232static void
3233ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3234 void *data)
3235{
3236 u32 *max_num_different_channels = data;
3237
3238 *max_num_different_channels = max(*max_num_different_channels,
3239 c->num_different_channels);
3240}
3241
3242int ieee80211_max_num_channels(struct ieee80211_local *local)
3243{
3244 struct ieee80211_sub_if_data *sdata;
3245 int num[NUM_NL80211_IFTYPES] = {};
3246 struct ieee80211_chanctx *ctx;
3247 int num_different_channels = 0;
3248 u8 radar_detect = 0;
3249 u32 max_num_different_channels = 1;
3250 int err;
3251
3252 lockdep_assert_held(&local->chanctx_mtx);
3253
3254 list_for_each_entry(ctx, &local->chanctx_list, list) {
5bcae31d
MK		 3255 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3256 continue;
3257
6fa001bc
MK		 3258 num_different_channels++;
3259
71e6195e 3260 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
6fa001bc
MK		 3261 }
3262
3263 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3264 num[sdata->wdev.iftype]++;
3265
3266 err = cfg80211_iter_combinations(local->hw.wiphy,
3267 num_different_channels, radar_detect,
3268 num, ieee80211_iter_max_chans,
3269 &max_num_different_channels);
3270 if (err < 0)
3271 return err;
3272
3273 return max_num_different_channels;
3274}
40b861a0
AN		 3275
3276u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3277{
3278 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3279 *buf++ = 7; /* len */
3280 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3281 *buf++ = 0x50;
3282 *buf++ = 0xf2;
3283 *buf++ = 2; /* WME */
3284 *buf++ = 0; /* WME info */
3285 *buf++ = 1; /* WME ver */
3286 *buf++ = qosinfo; /* U-APSD no in use */
3287
3288 return buf;
3289}
ba8c3d6f
FF		 3290
3291void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3292 struct sta_info *sta,
3293 struct txq_info *txqi, int tid)
3294{
3295 skb_queue_head_init(&txqi->queue);
3296 txqi->txq.vif = &sdata->vif;
3297
3298 if (sta) {
3299 txqi->txq.sta = &sta->sta;
3300 sta->sta.txq[tid] = &txqi->txq;
3301 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3302 } else {
3303 sdata->vif.txq = &txqi->txq;
3304 txqi->txq.ac = IEEE80211_AC_BE;
3305 }
3306}
Linux kernel - Deliverables
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