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