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mac80211: support more than one band in scan request
[linux-2.6-block.git] / net / mac80211 / util.c
CommitLineData
c2d1560a
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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
c56ef672
DS		 1222static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1223 u8 *buffer, size_t buffer_len,
1224 const u8 *ie, size_t ie_len,
1225 enum ieee80211_band band,
1226 u32 rate_mask,
1227 struct cfg80211_chan_def *chandef,
1228 size_t *offset)
de95a54b
JB		 1229{
1230 struct ieee80211_supported_band *sband;
c604b9f2 1231 u8 *pos = buffer, *end = buffer + buffer_len;
c56ef672 1232 size_t noffset;
8e664fb3 1233 int supp_rates_len, i;
8dcb2003
JM		 1234 u8 rates[32];
1235 int num_rates;
1236 int ext_rates_len;
2103dec1
SW		 1237 int shift;
1238 u32 rate_flags;
de95a54b 1239
c56ef672
DS		 1240 *offset = 0;
1241
4d36ec58 1242 sband = local->hw.wiphy->bands[band];
d811b3d5
AN		 1243 if (WARN_ON_ONCE(!sband))
1244 return 0;
de95a54b 1245
2103dec1
SW		 1246 rate_flags = ieee80211_chandef_rate_flags(chandef);
1247 shift = ieee80211_chandef_get_shift(chandef);
1248
8dcb2003
JM		 1249 num_rates = 0;
1250 for (i = 0; i < sband->n_bitrates; i++) {
1251 if ((BIT(i) & rate_mask) == 0)
1252 continue; /* skip rate */
2103dec1
SW		 1253 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1254 continue;
1255
1256 rates[num_rates++] =
1257 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1258 (1 << shift) * 5);
8dcb2003
JM		 1259 }
1260
1261 supp_rates_len = min_t(int, num_rates, 8);
8e664fb3 1262
c604b9f2
JB		 1263 if (end - pos < 2 + supp_rates_len)
1264 goto out_err;
de95a54b 1265 *pos++ = WLAN_EID_SUPP_RATES;
8e664fb3 1266 *pos++ = supp_rates_len;
8dcb2003
JM		 1267 memcpy(pos, rates, supp_rates_len);
1268 pos += supp_rates_len;
8e664fb3
JB		 1269
1270 /* insert "request information" if in custom IEs */
1271 if (ie && ie_len) {
1272 static const u8 before_extrates[] = {
1273 WLAN_EID_SSID,
1274 WLAN_EID_SUPP_RATES,
1275 WLAN_EID_REQUEST,
1276 };
1277 noffset = ieee80211_ie_split(ie, ie_len,
1278 before_extrates,
1279 ARRAY_SIZE(before_extrates),
c56ef672
DS		 1280 *offset);
1281 if (end - pos < noffset - *offset)
c604b9f2 1282 goto out_err;
c56ef672
DS		 1283 memcpy(pos, ie + *offset, noffset - *offset);
1284 pos += noffset - *offset;
1285 *offset = noffset;
8e664fb3
JB		 1286 }
1287
8dcb2003
JM		 1288 ext_rates_len = num_rates - supp_rates_len;
1289 if (ext_rates_len > 0) {
c604b9f2
JB		 1290 if (end - pos < 2 + ext_rates_len)
1291 goto out_err;
8e664fb3 1292 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8dcb2003
JM		 1293 *pos++ = ext_rates_len;
1294 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1295 pos += ext_rates_len;
8e664fb3
JB		 1296 }
1297
2103dec1 1298 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
c604b9f2
JB		 1299 if (end - pos < 3)
1300 goto out_err;
651b5225
JM		 1301 *pos++ = WLAN_EID_DS_PARAMS;
1302 *pos++ = 1;
2103dec1
SW		 1303 *pos++ = ieee80211_frequency_to_channel(
1304 chandef->chan->center_freq);
651b5225
JM		 1305 }
1306
8e664fb3
JB		 1307 /* insert custom IEs that go before HT */
1308 if (ie && ie_len) {
1309 static const u8 before_ht[] = {
1310 WLAN_EID_SSID,
1311 WLAN_EID_SUPP_RATES,
1312 WLAN_EID_REQUEST,
1313 WLAN_EID_EXT_SUPP_RATES,
1314 WLAN_EID_DS_PARAMS,
1315 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1316 };
1317 noffset = ieee80211_ie_split(ie, ie_len,
1318 before_ht, ARRAY_SIZE(before_ht),
c56ef672
DS		 1319 *offset);
1320 if (end - pos < noffset - *offset)
c604b9f2 1321 goto out_err;
c56ef672
DS		 1322 memcpy(pos, ie + *offset, noffset - *offset);
1323 pos += noffset - *offset;
1324 *offset = noffset;
de95a54b
JB		 1325 }
1326
c604b9f2
JB		 1327 if (sband->ht_cap.ht_supported) {
1328 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1329 goto out_err;
ef96a842
BG		 1330 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1331 sband->ht_cap.cap);
c604b9f2 1332 }
5ef2d41a 1333
de95a54b
JB		 1334 /*
1335 * If adding more here, adjust code in main.c
1336 * that calculates local->scan_ies_len.
1337 */
1338
4d952300 1339 /* insert custom IEs that go before VHT */
8e664fb3 1340 if (ie && ie_len) {
4d952300
JB		 1341 static const u8 before_vht[] = {
1342 WLAN_EID_SSID,
1343 WLAN_EID_SUPP_RATES,
1344 WLAN_EID_REQUEST,
1345 WLAN_EID_EXT_SUPP_RATES,
1346 WLAN_EID_DS_PARAMS,
1347 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1348 WLAN_EID_HT_CAPABILITY,
1349 WLAN_EID_BSS_COEX_2040,
1350 WLAN_EID_EXT_CAPABILITY,
1351 WLAN_EID_SSID_LIST,
1352 WLAN_EID_CHANNEL_USAGE,
1353 WLAN_EID_INTERWORKING,
1354 /* mesh ID can't happen here */
1355 /* 60 GHz can't happen here right now */
1356 };
1357 noffset = ieee80211_ie_split(ie, ie_len,
1358 before_vht, ARRAY_SIZE(before_vht),
c56ef672
DS		 1359 *offset);
1360 if (end - pos < noffset - *offset)
c604b9f2 1361 goto out_err;
c56ef672
DS		 1362 memcpy(pos, ie + *offset, noffset - *offset);
1363 pos += noffset - *offset;
1364 *offset = noffset;
de95a54b
JB		 1365 }
1366
c604b9f2
JB		 1367 if (sband->vht_cap.vht_supported) {
1368 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1369 goto out_err;
ba0afa2f
MP		 1370 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1371 sband->vht_cap.cap);
c604b9f2 1372 }
ba0afa2f 1373
c604b9f2
JB		 1374 return pos - buffer;
1375 out_err:
1376 WARN_ONCE(1, "not enough space for preq IEs\n");
de95a54b
JB		 1377 return pos - buffer;
1378}
1379
c56ef672
DS		 1380int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1381 size_t buffer_len,
1382 struct ieee80211_scan_ies *ie_desc,
1383 const u8 *ie, size_t ie_len,
1384 u8 bands_used, u32 *rate_masks,
1385 struct cfg80211_chan_def *chandef)
1386{
1387 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1388 int i;
1389
1390 memset(ie_desc, 0, sizeof(*ie_desc));
1391
1392 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1393 if (bands_used & BIT(i)) {
1394 pos += ieee80211_build_preq_ies_band(local,
1395 buffer + pos,
1396 buffer_len - pos,
1397 ie, ie_len, i,
1398 rate_masks[i],
1399 chandef,
1400 &custom_ie_offset);
1401 ie_desc->ies[i] = buffer + old_pos;
1402 ie_desc->len[i] = pos - old_pos;
1403 old_pos = pos;
1404 }
1405 }
1406
1407 /* add any remaining custom IEs */
1408 if (ie && ie_len) {
1409 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1410 "not enough space for preq custom IEs\n"))
1411 return pos;
1412 memcpy(buffer + pos, ie + custom_ie_offset,
1413 ie_len - custom_ie_offset);
1414 ie_desc->common_ies = buffer + pos;
1415 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1416 pos += ie_len - custom_ie_offset;
1417 }
1418
1419 return pos;
1420};
1421
a619a4c0 1422struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
85a237fe 1423 u8 *dst, u32 ratemask,
6b77863b 1424 struct ieee80211_channel *chan,
a619a4c0 1425 const u8 *ssid, size_t ssid_len,
a806c558
PS		 1426 const u8 *ie, size_t ie_len,
1427 bool directed)
46900298
JB		 1428{
1429 struct ieee80211_local *local = sdata->local;
2103dec1 1430 struct cfg80211_chan_def chandef;
46900298
JB		 1431 struct sk_buff *skb;
1432 struct ieee80211_mgmt *mgmt;
b9a9ada1 1433 int ies_len;
c56ef672
DS		 1434 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1435 struct ieee80211_scan_ies dummy_ie_desc;
46900298 1436
a806c558
PS		 1437 /*
1438 * Do not send DS Channel parameter for directed probe requests
1439 * in order to maximize the chance that we get a response. Some
1440 * badly-behaved APs don't respond when this parameter is included.
1441 */
2103dec1 1442 chandef.width = sdata->vif.bss_conf.chandef.width;
a806c558 1443 if (directed)
2103dec1 1444 chandef.chan = NULL;
a806c558 1445 else
2103dec1 1446 chandef.chan = chan;
651b5225 1447
7c12ce8b 1448 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
b9a9ada1 1449 ssid, ssid_len, 100 + ie_len);
5b2bbf75 1450 if (!skb)
b9a9ada1
JB		 1451 return NULL;
1452
c56ef672 1453 rate_masks[chan->band] = ratemask;
b9a9ada1 1454 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
c56ef672
DS		 1455 skb_tailroom(skb), &dummy_ie_desc,
1456 ie, ie_len, BIT(chan->band),
1457 rate_masks, &chandef);
b9a9ada1 1458 skb_put(skb, ies_len);
7c12ce8b 1459
46900298 1460 if (dst) {
7c12ce8b 1461 mgmt = (struct ieee80211_mgmt *) skb->data;
46900298
JB		 1462 memcpy(mgmt->da, dst, ETH_ALEN);
1463 memcpy(mgmt->bssid, dst, ETH_ALEN);
46900298 1464 }
46900298 1465
62ae67be 1466 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5b2bbf75 1467
a619a4c0
JO		 1468 return skb;
1469}
1470
1471void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1472 const u8 *ssid, size_t ssid_len,
a806c558 1473 const u8 *ie, size_t ie_len,
1672c0e3 1474 u32 ratemask, bool directed, u32 tx_flags,
55de908a 1475 struct ieee80211_channel *channel, bool scan)
a619a4c0
JO		 1476{
1477 struct sk_buff *skb;
1478
fe94fe05 1479 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
6b77863b 1480 ssid, ssid_len,
85a237fe 1481 ie, ie_len, directed);
aad14ceb 1482 if (skb) {
1672c0e3 1483 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
55de908a
JB		 1484 if (scan)
1485 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1486 else
1487 ieee80211_tx_skb(sdata, skb);
aad14ceb 1488 }
46900298
JB		 1489}
1490
2103dec1 1491u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
46900298 1492 struct ieee802_11_elems *elems,
9ebb61a2 1493 enum ieee80211_band band, u32 *basic_rates)
46900298
JB		 1494{
1495 struct ieee80211_supported_band *sband;
46900298 1496 size_t num_rates;
2103dec1
SW		 1497 u32 supp_rates, rate_flags;
1498 int i, j, shift;
1499 sband = sdata->local->hw.wiphy->bands[band];
1500
1501 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1502 shift = ieee80211_vif_get_shift(&sdata->vif);
46900298 1503
4ee73f33
MK		 1504 if (WARN_ON(!sband))
1505 return 1;
46900298 1506
46900298
JB		 1507 num_rates = sband->n_bitrates;
1508 supp_rates = 0;
1509 for (i = 0; i < elems->supp_rates_len +
1510 elems->ext_supp_rates_len; i++) {
1511 u8 rate = 0;
1512 int own_rate;
9ebb61a2 1513 bool is_basic;
46900298
JB		 1514 if (i < elems->supp_rates_len)
1515 rate = elems->supp_rates[i];
1516 else if (elems->ext_supp_rates)
1517 rate = elems->ext_supp_rates
1518 [i - elems->supp_rates_len];
1519 own_rate = 5 * (rate & 0x7f);
9ebb61a2
AN		 1520 is_basic = !!(rate & 0x80);
1521
1522 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1523 continue;
1524
1525 for (j = 0; j < num_rates; j++) {
2103dec1
SW		 1526 int brate;
1527 if ((rate_flags & sband->bitrates[j].flags)
1528 != rate_flags)
1529 continue;
1530
1531 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1532 1 << shift);
1533
1534 if (brate == own_rate) {
46900298 1535 supp_rates |= BIT(j);
9ebb61a2
AN		 1536 if (basic_rates && is_basic)
1537 *basic_rates |= BIT(j);
1538 }
1539 }
46900298
JB		 1540 }
1541 return supp_rates;
1542}
f2753ddb 1543
84f6a01c
JB		 1544void ieee80211_stop_device(struct ieee80211_local *local)
1545{
1546 ieee80211_led_radio(local, false);
67408c8c 1547 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
84f6a01c
JB		 1548
1549 cancel_work_sync(&local->reconfig_filter);
84f6a01c
JB		 1550
1551 flush_workqueue(local->workqueue);
678f415f 1552 drv_stop(local);
84f6a01c
JB		 1553}
1554
f6837ba8
JB		 1555static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1556{
1557 struct ieee80211_sub_if_data *sdata;
1558 struct ieee80211_chanctx *ctx;
1559
1560 /*
1561 * We get here if during resume the device can't be restarted properly.
1562 * We might also get here if this happens during HW reset, which is a
1563 * slightly different situation and we need to drop all connections in
1564 * the latter case.
1565 *
1566 * Ask cfg80211 to turn off all interfaces, this will result in more
1567 * warnings but at least we'll then get into a clean stopped state.
1568 */
1569
1570 local->resuming = false;
1571 local->suspended = false;
1572 local->started = false;
1573
1574 /* scheduled scan clearly can't be running any more, but tell
1575 * cfg80211 and clear local state
1576 */
1577 ieee80211_sched_scan_end(local);
1578
1579 list_for_each_entry(sdata, &local->interfaces, list)
1580 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1581
1582 /* Mark channel contexts as not being in the driver any more to avoid
1583 * removing them from the driver during the shutdown process...
1584 */
1585 mutex_lock(&local->chanctx_mtx);
1586 list_for_each_entry(ctx, &local->chanctx_list, list)
1587 ctx->driver_present = false;
1588 mutex_unlock(&local->chanctx_mtx);
1589
1590 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1591}
1592
153a5fc4
SG		 1593static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1594 struct ieee80211_sub_if_data *sdata)
1595{
1596 struct ieee80211_chanctx_conf *conf;
1597 struct ieee80211_chanctx *ctx;
1598
1599 if (!local->use_chanctx)
1600 return;
1601
1602 mutex_lock(&local->chanctx_mtx);
1603 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1604 lockdep_is_held(&local->chanctx_mtx));
1605 if (conf) {
1606 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1607 drv_assign_vif_chanctx(local, sdata, ctx);
1608 }
1609 mutex_unlock(&local->chanctx_mtx);
1610}
1611
f2753ddb
JB		 1612int ieee80211_reconfig(struct ieee80211_local *local)
1613{
1614 struct ieee80211_hw *hw = &local->hw;
1615 struct ieee80211_sub_if_data *sdata;
55de908a 1616 struct ieee80211_chanctx *ctx;
f2753ddb 1617 struct sta_info *sta;
2683d65b 1618 int res, i;
d888130a 1619 bool reconfig_due_to_wowlan = false;
d43c6b6e
DS		 1620 struct ieee80211_sub_if_data *sched_scan_sdata;
1621 bool sched_scan_stopped = false;
d888130a 1622
8f21b0ad 1623#ifdef CONFIG_PM
ceb99fe0
JB		 1624 if (local->suspended)
1625 local->resuming = true;
f2753ddb 1626
eecc4800 1627 if (local->wowlan) {
eecc4800 1628 res = drv_resume(local);
27b3eb9c 1629 local->wowlan = false;
eecc4800
JB		 1630 if (res < 0) {
1631 local->resuming = false;
1632 return res;
1633 }
1634 if (res == 0)
1635 goto wake_up;
1636 WARN_ON(res > 1);
1637 /*
1638 * res is 1, which means the driver requested
1639 * to go through a regular reset on wakeup.
1640 */
d888130a 1641 reconfig_due_to_wowlan = true;
eecc4800
JB		 1642 }
1643#endif
94f9b97b
JB		 1644 /* everything else happens only if HW was up & running */
1645 if (!local->open_count)
1646 goto wake_up;
f2753ddb 1647
94f9b97b
JB		 1648 /*
1649 * Upon resume hardware can sometimes be goofy due to
1650 * various platform / driver / bus issues, so restarting
1651 * the device may at times not work immediately. Propagate
1652 * the error.
1653 */
1654 res = drv_start(local);
1655 if (res) {
f6837ba8
JB		 1656 if (local->suspended)
1657 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1658 else
1659 WARN(1, "Hardware became unavailable during restart.\n");
1660 ieee80211_handle_reconfig_failure(local);
94f9b97b 1661 return res;
f2753ddb
JB		 1662 }
1663
7f281975
YAP		 1664 /* setup fragmentation threshold */
1665 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1666
1667 /* setup RTS threshold */
1668 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1669
1670 /* reset coverage class */
1671 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1672
94f9b97b
JB		 1673 ieee80211_led_radio(local, true);
1674 ieee80211_mod_tpt_led_trig(local,
1675 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1676
f2753ddb 1677 /* add interfaces */
4b6f1dd6
JB		 1678 sdata = rtnl_dereference(local->monitor_sdata);
1679 if (sdata) {
3c3e21e7
JB		 1680 /* in HW restart it exists already */
1681 WARN_ON(local->resuming);
4b6f1dd6
JB		 1682 res = drv_add_interface(local, sdata);
1683 if (WARN_ON(res)) {
0c2bef46 1684 RCU_INIT_POINTER(local->monitor_sdata, NULL);
4b6f1dd6
JB		 1685 synchronize_net();
1686 kfree(sdata);
1687 }
1688 }
1689
f2753ddb
JB		 1690 list_for_each_entry(sdata, &local->interfaces, list) {
1691 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1692 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1ed32e4f 1693 ieee80211_sdata_running(sdata))
7b7eab6f 1694 res = drv_add_interface(local, sdata);
f2753ddb
JB		 1695 }
1696
55de908a 1697 /* add channel contexts */
f0dea9c7
AS		 1698 if (local->use_chanctx) {
1699 mutex_lock(&local->chanctx_mtx);
1700 list_for_each_entry(ctx, &local->chanctx_list, list)
1701 WARN_ON(drv_add_chanctx(local, ctx));
1702 mutex_unlock(&local->chanctx_mtx);
55de908a 1703
7df180f7
ZG		 1704 list_for_each_entry(sdata, &local->interfaces, list) {
1705 if (!ieee80211_sdata_running(sdata))
1706 continue;
1707 ieee80211_assign_chanctx(local, sdata);
1708 }
6352c87f 1709
7df180f7
ZG		 1710 sdata = rtnl_dereference(local->monitor_sdata);
1711 if (sdata && ieee80211_sdata_running(sdata))
1712 ieee80211_assign_chanctx(local, sdata);
1713 }
fe5f2559 1714
f2753ddb 1715 /* add STAs back */
34e89507
JB		 1716 mutex_lock(&local->sta_mtx);
1717 list_for_each_entry(sta, &local->sta_list, list) {
2e8d397e 1718 enum ieee80211_sta_state state;
f09603a2 1719
2e8d397e
AN		 1720 if (!sta->uploaded)
1721 continue;
1722
1723 /* AP-mode stations will be added later */
1724 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1725 continue;
1726
1727 for (state = IEEE80211_STA_NOTEXIST;
1728 state < sta->sta_state; state++)
1729 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1730 state + 1));
f2753ddb 1731 }
34e89507 1732 mutex_unlock(&local->sta_mtx);
f2753ddb 1733
2683d65b 1734 /* reconfigure tx conf */
54bcbc69
JB		 1735 if (hw->queues >= IEEE80211_NUM_ACS) {
1736 list_for_each_entry(sdata, &local->interfaces, list) {
1737 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1738 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1739 !ieee80211_sdata_running(sdata))
1740 continue;
f6f3def3 1741
54bcbc69
JB		 1742 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1743 drv_conf_tx(local, sdata, i,
1744 &sdata->tx_conf[i]);
1745 }
f6f3def3 1746 }
2683d65b 1747
f2753ddb
JB		 1748 /* reconfigure hardware */
1749 ieee80211_hw_config(local, ~0);
1750
f2753ddb 1751 ieee80211_configure_filter(local);
f2753ddb
JB		 1752
1753 /* Finally also reconfigure all the BSS information */
1754 list_for_each_entry(sdata, &local->interfaces, list) {
ac8dd506
JB		 1755 u32 changed;
1756
9607e6b6 1757 if (!ieee80211_sdata_running(sdata))
f2753ddb 1758 continue;
ac8dd506
JB		 1759
1760 /* common change flags for all interface types */
1761 changed = BSS_CHANGED_ERP_CTS_PROT |
1762 BSS_CHANGED_ERP_PREAMBLE |
1763 BSS_CHANGED_ERP_SLOT |
1764 BSS_CHANGED_HT |
1765 BSS_CHANGED_BASIC_RATES |
1766 BSS_CHANGED_BEACON_INT |
1767 BSS_CHANGED_BSSID |
4ced3f74 1768 BSS_CHANGED_CQM |
55de47f6 1769 BSS_CHANGED_QOS |
1ea6f9c0
JB		 1770 BSS_CHANGED_IDLE |
1771 BSS_CHANGED_TXPOWER;
ac8dd506 1772
f2753ddb
JB		 1773 switch (sdata->vif.type) {
1774 case NL80211_IFTYPE_STATION:
0d392e93 1775 changed |= BSS_CHANGED_ASSOC |
ab095877
EP		 1776 BSS_CHANGED_ARP_FILTER |
1777 BSS_CHANGED_PS;
c65dd147 1778
989c6505
AB		 1779 /* Re-send beacon info report to the driver */
1780 if (sdata->u.mgd.have_beacon)
1781 changed |= BSS_CHANGED_BEACON_INFO;
c65dd147 1782
8d61ffa5 1783 sdata_lock(sdata);
ac8dd506 1784 ieee80211_bss_info_change_notify(sdata, changed);
8d61ffa5 1785 sdata_unlock(sdata);
ac8dd506 1786 break;
f2753ddb 1787 case NL80211_IFTYPE_ADHOC:
ac8dd506
JB		 1788 changed |= BSS_CHANGED_IBSS;
1789 /* fall through */
f2753ddb 1790 case NL80211_IFTYPE_AP:
339afbf4 1791 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
e7979ac7 1792
1041638f 1793 if (sdata->vif.type == NL80211_IFTYPE_AP) {
e7979ac7
AN		 1794 changed |= BSS_CHANGED_AP_PROBE_RESP;
1795
1041638f
JB		 1796 if (rcu_access_pointer(sdata->u.ap.beacon))
1797 drv_start_ap(local, sdata);
1798 }
1799
7827493b 1800 /* fall through */
f2753ddb 1801 case NL80211_IFTYPE_MESH_POINT:
8da34932
JB		 1802 if (sdata->vif.bss_conf.enable_beacon) {
1803 changed |= BSS_CHANGED_BEACON |
1804 BSS_CHANGED_BEACON_ENABLED;
1805 ieee80211_bss_info_change_notify(sdata, changed);
1806 }
f2753ddb
JB		 1807 break;
1808 case NL80211_IFTYPE_WDS:
f2753ddb
JB		 1809 case NL80211_IFTYPE_AP_VLAN:
1810 case NL80211_IFTYPE_MONITOR:
98104fde 1811 case NL80211_IFTYPE_P2P_DEVICE:
b205786e 1812 /* nothing to do */
f142c6b9 1813 break;
f2753ddb 1814 case NL80211_IFTYPE_UNSPECIFIED:
2e161f78 1815 case NUM_NL80211_IFTYPES:
2ca27bcf
JB		 1816 case NL80211_IFTYPE_P2P_CLIENT:
1817 case NL80211_IFTYPE_P2P_GO:
f2753ddb
JB		 1818 WARN_ON(1);
1819 break;
1820 }
1821 }
1822
8e1b23b9
ES		 1823 ieee80211_recalc_ps(local, -1);
1824
6e1b1b24
EP		 1825 /*
1826 * The sta might be in psm against the ap (e.g. because
1827 * this was the state before a hw restart), so we
1828 * explicitly send a null packet in order to make sure
1829 * it'll sync against the ap (and get out of psm).
1830 */
1831 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1832 list_for_each_entry(sdata, &local->interfaces, list) {
1833 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1834 continue;
20f544ee
JB		 1835 if (!sdata->u.mgd.associated)
1836 continue;
6e1b1b24
EP		 1837
1838 ieee80211_send_nullfunc(local, sdata, 0);
1839 }
1840 }
1841
2e8d397e
AN		 1842 /* APs are now beaconing, add back stations */
1843 mutex_lock(&local->sta_mtx);
1844 list_for_each_entry(sta, &local->sta_list, list) {
1845 enum ieee80211_sta_state state;
1846
1847 if (!sta->uploaded)
1848 continue;
1849
1850 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1851 continue;
1852
1853 for (state = IEEE80211_STA_NOTEXIST;
1854 state < sta->sta_state; state++)
1855 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1856 state + 1));
1857 }
1858 mutex_unlock(&local->sta_mtx);
1859
7b21aea0
ES		 1860 /* add back keys */
1861 list_for_each_entry(sdata, &local->interfaces, list)
1862 if (ieee80211_sdata_running(sdata))
1863 ieee80211_enable_keys(sdata);
1864
c6209488 1865 wake_up:
04800ada
AN		 1866 local->in_reconfig = false;
1867 barrier();
1868
3c3e21e7
JB		 1869 if (local->monitors == local->open_count && local->monitors > 0)
1870 ieee80211_add_virtual_monitor(local);
1871
2a419056
JB		 1872 /*
1873 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1874 * sessions can be established after a resume.
1875 *
1876 * Also tear down aggregation sessions since reconfiguring
1877 * them in a hardware restart scenario is not easily done
1878 * right now, and the hardware will have lost information
1879 * about the sessions, but we and the AP still think they
1880 * are active. This is really a workaround though.
1881 */
74e2bd1f 1882 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2a419056
JB		 1883 mutex_lock(&local->sta_mtx);
1884
1885 list_for_each_entry(sta, &local->sta_list, list) {
c82c4a80
JB		 1886 ieee80211_sta_tear_down_BA_sessions(
1887 sta, AGG_STOP_LOCAL_REQUEST);
c2c98fde 1888 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
74e2bd1f 1889 }
2a419056
JB		 1890
1891 mutex_unlock(&local->sta_mtx);
74e2bd1f 1892 }
74e2bd1f 1893
445ea4e8 1894 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 1895 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1896 false);
f2753ddb 1897
32769814
AN		 1898 /*
1899 * Reconfigure sched scan if it was interrupted by FW restart or
1900 * suspend.
1901 */
1902 mutex_lock(&local->mtx);
1903 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1904 lockdep_is_held(&local->mtx));
1905 if (sched_scan_sdata && local->sched_scan_req)
1906 /*
1907 * Sched scan stopped, but we don't want to report it. Instead,
1908 * we're trying to reschedule.
1909 */
1910 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1911 local->sched_scan_req))
1912 sched_scan_stopped = true;
1913 mutex_unlock(&local->mtx);
1914
1915 if (sched_scan_stopped)
e669ba2d 1916 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
32769814 1917
5bb644a0
JB		 1918 /*
1919 * If this is for hw restart things are still running.
1920 * We may want to change that later, however.
1921 */
8f21b0ad 1922 if (!local->suspended || reconfig_due_to_wowlan)
9214ad7f 1923 drv_restart_complete(local);
8f21b0ad
JB		 1924
1925 if (!local->suspended)
5bb644a0
JB		 1926 return 0;
1927
1928#ifdef CONFIG_PM
ceb99fe0 1929 /* first set suspended false, then resuming */
5bb644a0 1930 local->suspended = false;
ceb99fe0
JB		 1931 mb();
1932 local->resuming = false;
5bb644a0 1933
b8360ab8
JB		 1934 list_for_each_entry(sdata, &local->interfaces, list) {
1935 if (!ieee80211_sdata_running(sdata))
1936 continue;
1937 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1938 ieee80211_sta_restart(sdata);
1939 }
1940
26d59535 1941 mod_timer(&local->sta_cleanup, jiffies + 1);
5bb644a0
JB		 1942#else
1943 WARN_ON(1);
1944#endif
d43c6b6e 1945
f2753ddb
JB		 1946 return 0;
1947}
42935eca 1948
95acac61
JB		 1949void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1950{
1951 struct ieee80211_sub_if_data *sdata;
1952 struct ieee80211_local *local;
1953 struct ieee80211_key *key;
1954
1955 if (WARN_ON(!vif))
1956 return;
1957
1958 sdata = vif_to_sdata(vif);
1959 local = sdata->local;
1960
1961 if (WARN_ON(!local->resuming))
1962 return;
1963
1964 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1965 return;
1966
1967 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1968
1969 mutex_lock(&local->key_mtx);
1970 list_for_each_entry(key, &sdata->key_list, list)
1971 key->flags |= KEY_FLAG_TAINTED;
1972 mutex_unlock(&local->key_mtx);
1973}
1974EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1975
04ecd257 1976void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
0f78231b 1977{
04ecd257
JB		 1978 struct ieee80211_local *local = sdata->local;
1979 struct ieee80211_chanctx_conf *chanctx_conf;
1980 struct ieee80211_chanctx *chanctx;
025e6be2 1981
04ecd257 1982 mutex_lock(&local->chanctx_mtx);
0f78231b 1983
04ecd257
JB		 1984 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1985 lockdep_is_held(&local->chanctx_mtx));
0f78231b 1986
04ecd257 1987 if (WARN_ON_ONCE(!chanctx_conf))
5d8e4237 1988 goto unlock;
0f78231b 1989
04ecd257
JB		 1990 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1991 ieee80211_recalc_smps_chanctx(local, chanctx);
5d8e4237 1992 unlock:
04ecd257 1993 mutex_unlock(&local->chanctx_mtx);
0f78231b 1994}
8e664fb3 1995
21f659bf
EP		 1996void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1997{
1998 struct ieee80211_local *local = sdata->local;
1999 struct ieee80211_chanctx_conf *chanctx_conf;
2000 struct ieee80211_chanctx *chanctx;
2001
2002 mutex_lock(&local->chanctx_mtx);
2003
2004 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2005 lockdep_is_held(&local->chanctx_mtx));
2006
2007 if (WARN_ON_ONCE(!chanctx_conf))
2008 goto unlock;
2009
2010 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2011 ieee80211_recalc_chanctx_min_def(local, chanctx);
2012 unlock:
2013 mutex_unlock(&local->chanctx_mtx);
2014}
2015
8e664fb3
JB		 2016static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2017{
2018 int i;
2019
2020 for (i = 0; i < n_ids; i++)
2021 if (ids[i] == id)
2022 return true;
2023 return false;
2024}
2025
2026/**
2027 * ieee80211_ie_split - split an IE buffer according to ordering
2028 *
2029 * @ies: the IE buffer
2030 * @ielen: the length of the IE buffer
2031 * @ids: an array with element IDs that are allowed before
2032 * the split
2033 * @n_ids: the size of the element ID array
2034 * @offset: offset where to start splitting in the buffer
2035 *
2036 * This function splits an IE buffer by updating the @offset
2037 * variable to point to the location where the buffer should be
2038 * split.
2039 *
2040 * It assumes that the given IE buffer is well-formed, this
2041 * has to be guaranteed by the caller!
2042 *
2043 * It also assumes that the IEs in the buffer are ordered
2044 * correctly, if not the result of using this function will not
2045 * be ordered correctly either, i.e. it does no reordering.
2046 *
2047 * The function returns the offset where the next part of the
2048 * buffer starts, which may be @ielen if the entire (remainder)
2049 * of the buffer should be used.
2050 */
2051size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2052 const u8 *ids, int n_ids, size_t offset)
2053{
2054 size_t pos = offset;
2055
2056 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
2057 pos += 2 + ies[pos + 1];
2058
2059 return pos;
2060}
2061
2062size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2063{
2064 size_t pos = offset;
2065
2066 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2067 pos += 2 + ies[pos + 1];
2068
2069 return pos;
2070}
615f7b9b
MV		 2071
2072static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2073 int rssi_min_thold,
2074 int rssi_max_thold)
2075{
2076 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2077
2078 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2079 return;
2080
2081 /*
2082 * Scale up threshold values before storing it, as the RSSI averaging
2083 * algorithm uses a scaled up value as well. Change this scaling
2084 * factor if the RSSI averaging algorithm changes.
2085 */
2086 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2087 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2088}
2089
2090void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2091 int rssi_min_thold,
2092 int rssi_max_thold)
2093{
2094 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2095
2096 WARN_ON(rssi_min_thold == rssi_max_thold ||
2097 rssi_min_thold > rssi_max_thold);
2098
2099 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2100 rssi_max_thold);
2101}
2102EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2103
2104void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2105{
2106 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2107
2108 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2109}
2110EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
768db343 2111
ef96a842 2112u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
42e7aa77
AS		 2113 u16 cap)
2114{
2115 __le16 tmp;
2116
2117 *pos++ = WLAN_EID_HT_CAPABILITY;
2118 *pos++ = sizeof(struct ieee80211_ht_cap);
2119 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2120
2121 /* capability flags */
2122 tmp = cpu_to_le16(cap);
2123 memcpy(pos, &tmp, sizeof(u16));
2124 pos += sizeof(u16);
2125
2126 /* AMPDU parameters */
ef96a842
BG		 2127 *pos++ = ht_cap->ampdu_factor |
2128 (ht_cap->ampdu_density <<
42e7aa77
AS		 2129 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2130
2131 /* MCS set */
ef96a842
BG		 2132 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2133 pos += sizeof(ht_cap->mcs);
42e7aa77
AS		 2134
2135 /* extended capabilities */
2136 pos += sizeof(__le16);
2137
2138 /* BF capabilities */
2139 pos += sizeof(__le32);
2140
2141 /* antenna selection */
2142 pos += sizeof(u8);
2143
2144 return pos;
2145}
2146
ba0afa2f 2147u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
cc3983d8 2148 u32 cap)
ba0afa2f
MP		 2149{
2150 __le32 tmp;
2151
2152 *pos++ = WLAN_EID_VHT_CAPABILITY;
d4950281
MP		 2153 *pos++ = sizeof(struct ieee80211_vht_cap);
2154 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
ba0afa2f
MP		 2155
2156 /* capability flags */
2157 tmp = cpu_to_le32(cap);
2158 memcpy(pos, &tmp, sizeof(u32));
2159 pos += sizeof(u32);
2160
2161 /* VHT MCS set */
2162 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2163 pos += sizeof(vht_cap->vht_mcs);
2164
2165 return pos;
2166}
2167
074d46d1 2168u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
4bf88530 2169 const struct cfg80211_chan_def *chandef,
431e3154 2170 u16 prot_mode)
42e7aa77 2171{
074d46d1 2172 struct ieee80211_ht_operation *ht_oper;
42e7aa77 2173 /* Build HT Information */
074d46d1
JB		 2174 *pos++ = WLAN_EID_HT_OPERATION;
2175 *pos++ = sizeof(struct ieee80211_ht_operation);
2176 ht_oper = (struct ieee80211_ht_operation *)pos;
4bf88530
JB		 2177 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2178 chandef->chan->center_freq);
2179 switch (chandef->width) {
2180 case NL80211_CHAN_WIDTH_160:
2181 case NL80211_CHAN_WIDTH_80P80:
2182 case NL80211_CHAN_WIDTH_80:
2183 case NL80211_CHAN_WIDTH_40:
2184 if (chandef->center_freq1 > chandef->chan->center_freq)
2185 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2186 else
2187 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
42e7aa77 2188 break;
42e7aa77 2189 default:
074d46d1 2190 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
42e7aa77
AS		 2191 break;
2192 }
aee286c2 2193 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
4bf88530
JB		 2194 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2195 chandef->width != NL80211_CHAN_WIDTH_20)
074d46d1 2196 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
ff3cc5f4 2197
431e3154 2198 ht_oper->operation_mode = cpu_to_le16(prot_mode);
074d46d1 2199 ht_oper->stbc_param = 0x0000;
42e7aa77
AS		 2200
2201 /* It seems that Basic MCS set and Supported MCS set
2202 are identical for the first 10 bytes */
074d46d1
JB		 2203 memset(&ht_oper->basic_set, 0, 16);
2204 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
42e7aa77 2205
074d46d1 2206 return pos + sizeof(struct ieee80211_ht_operation);
42e7aa77
AS		 2207}
2208
4bf88530 2209void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
4a3cb702 2210 const struct ieee80211_ht_operation *ht_oper,
4bf88530 2211 struct cfg80211_chan_def *chandef)
42e7aa77
AS		 2212{
2213 enum nl80211_channel_type channel_type;
2214
4bf88530
JB		 2215 if (!ht_oper) {
2216 cfg80211_chandef_create(chandef, control_chan,
2217 NL80211_CHAN_NO_HT);
2218 return;
2219 }
42e7aa77 2220
074d46d1 2221 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
42e7aa77
AS		 2222 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2223 channel_type = NL80211_CHAN_HT20;
2224 break;
2225 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2226 channel_type = NL80211_CHAN_HT40PLUS;
2227 break;
2228 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2229 channel_type = NL80211_CHAN_HT40MINUS;
2230 break;
2231 default:
2232 channel_type = NL80211_CHAN_NO_HT;
2233 }
2234
4bf88530 2235 cfg80211_chandef_create(chandef, control_chan, channel_type);
42e7aa77
AS		 2236}
2237
2103dec1
SW		 2238int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2239 const struct ieee80211_supported_band *sband,
2240 const u8 *srates, int srates_len, u32 *rates)
2241{
2242 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2243 int shift = ieee80211_chandef_get_shift(chandef);
2244 struct ieee80211_rate *br;
2245 int brate, rate, i, j, count = 0;
2246
2247 *rates = 0;
2248
2249 for (i = 0; i < srates_len; i++) {
2250 rate = srates[i] & 0x7f;
2251
2252 for (j = 0; j < sband->n_bitrates; j++) {
2253 br = &sband->bitrates[j];
2254 if ((rate_flags & br->flags) != rate_flags)
2255 continue;
2256
2257 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2258 if (brate == rate) {
2259 *rates |= BIT(j);
2260 count++;
2261 break;
2262 }
2263 }
2264 }
2265 return count;
2266}
2267
fc8a7321 2268int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2269 struct sk_buff *skb, bool need_basic,
2270 enum ieee80211_band band)
768db343 2271{
768db343
AN		 2272 struct ieee80211_local *local = sdata->local;
2273 struct ieee80211_supported_band *sband;
2103dec1 2274 int rate, shift;
768db343 2275 u8 i, rates, *pos;
fc8a7321 2276 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1 2277 u32 rate_flags;
768db343 2278
2103dec1
SW		 2279 shift = ieee80211_vif_get_shift(&sdata->vif);
2280 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
6b77863b 2281 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2282 rates = 0;
2283 for (i = 0; i < sband->n_bitrates; i++) {
2284 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2285 continue;
2286 rates++;
2287 }
768db343
AN		 2288 if (rates > 8)
2289 rates = 8;
2290
2291 if (skb_tailroom(skb) < rates + 2)
2292 return -ENOMEM;
2293
2294 pos = skb_put(skb, rates + 2);
2295 *pos++ = WLAN_EID_SUPP_RATES;
2296 *pos++ = rates;
2297 for (i = 0; i < rates; i++) {
657c3e0c 2298 u8 basic = 0;
2103dec1
SW		 2299 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2300 continue;
2301
657c3e0c
AN		 2302 if (need_basic && basic_rates & BIT(i))
2303 basic = 0x80;
768db343 2304 rate = sband->bitrates[i].bitrate;
2103dec1
SW		 2305 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2306 5 * (1 << shift));
2307 *pos++ = basic | (u8) rate;
768db343
AN		 2308 }
2309
2310 return 0;
2311}
2312
fc8a7321 2313int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
6b77863b
JB		 2314 struct sk_buff *skb, bool need_basic,
2315 enum ieee80211_band band)
768db343 2316{
768db343
AN		 2317 struct ieee80211_local *local = sdata->local;
2318 struct ieee80211_supported_band *sband;
cc63ec76 2319 int rate, shift;
768db343 2320 u8 i, exrates, *pos;
fc8a7321 2321 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2103dec1
SW		 2322 u32 rate_flags;
2323
2324 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2325 shift = ieee80211_vif_get_shift(&sdata->vif);
768db343 2326
6b77863b 2327 sband = local->hw.wiphy->bands[band];
2103dec1
SW		 2328 exrates = 0;
2329 for (i = 0; i < sband->n_bitrates; i++) {
2330 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2331 continue;
2332 exrates++;
2333 }
2334
768db343
AN		 2335 if (exrates > 8)
2336 exrates -= 8;
2337 else
2338 exrates = 0;
2339
2340 if (skb_tailroom(skb) < exrates + 2)
2341 return -ENOMEM;
2342
2343 if (exrates) {
2344 pos = skb_put(skb, exrates + 2);
2345 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2346 *pos++ = exrates;
2347 for (i = 8; i < sband->n_bitrates; i++) {
657c3e0c 2348 u8 basic = 0;
2103dec1
SW		 2349 if ((rate_flags & sband->bitrates[i].flags)
2350 != rate_flags)
2351 continue;
657c3e0c
AN		 2352 if (need_basic && basic_rates & BIT(i))
2353 basic = 0x80;
2103dec1
SW		 2354 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2355 5 * (1 << shift));
2356 *pos++ = basic | (u8) rate;
768db343
AN		 2357 }
2358 }
2359 return 0;
2360}
1dae27f8
WYG		 2361
2362int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2363{
2364 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2366
be6bcabc
WYG		 2367 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2368 /* non-managed type inferfaces */
2369 return 0;
2370 }
3a7bba64 2371 return ifmgd->ave_beacon_signal / 16;
1dae27f8 2372}
0d8a0a17 2373EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
04ecd257
JB		 2374
2375u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2376{
2377 if (!mcs)
2378 return 1;
2379
2380 /* TODO: consider rx_highest */
2381
2382 if (mcs->rx_mask[3])
2383 return 4;
2384 if (mcs->rx_mask[2])
2385 return 3;
2386 if (mcs->rx_mask[1])
2387 return 2;
2388 return 1;
2389}
f4bda337
TP		 2390
2391/**
2392 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2393 * @local: mac80211 hw info struct
2394 * @status: RX status
2395 * @mpdu_len: total MPDU length (including FCS)
2396 * @mpdu_offset: offset into MPDU to calculate timestamp at
2397 *
2398 * This function calculates the RX timestamp at the given MPDU offset, taking
2399 * into account what the RX timestamp was. An offset of 0 will just normalize
2400 * the timestamp to TSF at beginning of MPDU reception.
2401 */
2402u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2403 struct ieee80211_rx_status *status,
2404 unsigned int mpdu_len,
2405 unsigned int mpdu_offset)
2406{
2407 u64 ts = status->mactime;
2408 struct rate_info ri;
2409 u16 rate;
2410
2411 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2412 return 0;
2413
2414 memset(&ri, 0, sizeof(ri));
2415
2416 /* Fill cfg80211 rate info */
2417 if (status->flag & RX_FLAG_HT) {
2418 ri.mcs = status->rate_idx;
2419 ri.flags |= RATE_INFO_FLAGS_MCS;
2420 if (status->flag & RX_FLAG_40MHZ)
2421 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2422 if (status->flag & RX_FLAG_SHORT_GI)
2423 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
5614618e
JB		 2424 } else if (status->flag & RX_FLAG_VHT) {
2425 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2426 ri.mcs = status->rate_idx;
2427 ri.nss = status->vht_nss;
2428 if (status->flag & RX_FLAG_40MHZ)
2429 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
1b8d242a 2430 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
5614618e 2431 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
1b8d242a 2432 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
5614618e 2433 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
1b8d242a 2434 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
5614618e
JB		 2435 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2436 if (status->flag & RX_FLAG_SHORT_GI)
2437 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
f4bda337
TP		 2438 } else {
2439 struct ieee80211_supported_band *sband;
2103dec1
SW		 2440 int shift = 0;
2441 int bitrate;
2442
2443 if (status->flag & RX_FLAG_10MHZ)
2444 shift = 1;
2445 if (status->flag & RX_FLAG_5MHZ)
2446 shift = 2;
f4bda337
TP		 2447
2448 sband = local->hw.wiphy->bands[status->band];
2103dec1
SW		 2449 bitrate = sband->bitrates[status->rate_idx].bitrate;
2450 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
f4bda337
TP		 2451 }
2452
2453 rate = cfg80211_calculate_bitrate(&ri);
d86aa4f8
JB		 2454 if (WARN_ONCE(!rate,
2455 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2456 status->flag, status->rate_idx, status->vht_nss))
2457 return 0;
f4bda337
TP		 2458
2459 /* rewind from end of MPDU */
2460 if (status->flag & RX_FLAG_MACTIME_END)
2461 ts -= mpdu_len * 8 * 10 / rate;
2462
2463 ts += mpdu_offset * 8 * 10 / rate;
2464
2465 return ts;
2466}
164eb02d
SW		 2467
2468void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2469{
2470 struct ieee80211_sub_if_data *sdata;
d2859df5 2471 struct cfg80211_chan_def chandef;
164eb02d 2472
34a3740d 2473 mutex_lock(&local->mtx);
164eb02d
SW		 2474 mutex_lock(&local->iflist_mtx);
2475 list_for_each_entry(sdata, &local->interfaces, list) {
34a3740d
JB		 2476 /* it might be waiting for the local->mtx, but then
2477 * by the time it gets it, sdata->wdev.cac_started
2478 * will no longer be true
2479 */
2480 cancel_delayed_work(&sdata->dfs_cac_timer_work);
164eb02d
SW		 2481
2482 if (sdata->wdev.cac_started) {
d2859df5 2483 chandef = sdata->vif.bss_conf.chandef;
164eb02d
SW		 2484 ieee80211_vif_release_channel(sdata);
2485 cfg80211_cac_event(sdata->dev,
d2859df5 2486 &chandef,
164eb02d
SW		 2487 NL80211_RADAR_CAC_ABORTED,
2488 GFP_KERNEL);
2489 }
2490 }
2491 mutex_unlock(&local->iflist_mtx);
34a3740d 2492 mutex_unlock(&local->mtx);
164eb02d
SW		 2493}
2494
2495void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2496{
2497 struct ieee80211_local *local =
2498 container_of(work, struct ieee80211_local, radar_detected_work);
84a3d1c9 2499 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
164eb02d
SW		 2500
2501 ieee80211_dfs_cac_cancel(local);
2502
2503 if (local->use_chanctx)
2504 /* currently not handled */
2505 WARN_ON(1);
84a3d1c9 2506 else
164eb02d 2507 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
164eb02d
SW		 2508}
2509
2510void ieee80211_radar_detected(struct ieee80211_hw *hw)
2511{
2512 struct ieee80211_local *local = hw_to_local(hw);
2513
2514 trace_api_radar_detected(local);
2515
2516 ieee80211_queue_work(hw, &local->radar_detected_work);
2517}
2518EXPORT_SYMBOL(ieee80211_radar_detected);
e6b7cde4
SW		 2519
2520u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2521{
2522 u32 ret;
2523 int tmp;
2524
2525 switch (c->width) {
2526 case NL80211_CHAN_WIDTH_20:
2527 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2528 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2529 break;
2530 case NL80211_CHAN_WIDTH_40:
2531 c->width = NL80211_CHAN_WIDTH_20;
2532 c->center_freq1 = c->chan->center_freq;
2533 ret = IEEE80211_STA_DISABLE_40MHZ |
2534 IEEE80211_STA_DISABLE_VHT;
2535 break;
2536 case NL80211_CHAN_WIDTH_80:
2537 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2538 /* n_P40 */
2539 tmp /= 2;
2540 /* freq_P40 */
2541 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2542 c->width = NL80211_CHAN_WIDTH_40;
2543 ret = IEEE80211_STA_DISABLE_VHT;
2544 break;
2545 case NL80211_CHAN_WIDTH_80P80:
2546 c->center_freq2 = 0;
2547 c->width = NL80211_CHAN_WIDTH_80;
2548 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2549 IEEE80211_STA_DISABLE_160MHZ;
2550 break;
2551 case NL80211_CHAN_WIDTH_160:
2552 /* n_P20 */
2553 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2554 /* n_P80 */
2555 tmp /= 4;
2556 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2557 c->width = NL80211_CHAN_WIDTH_80;
2558 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2559 IEEE80211_STA_DISABLE_160MHZ;
2560 break;
2561 default:
2562 case NL80211_CHAN_WIDTH_20_NOHT:
2563 WARN_ON_ONCE(1);
2564 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2565 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2566 break;
2567 case NL80211_CHAN_WIDTH_5:
2568 case NL80211_CHAN_WIDTH_10:
2569 WARN_ON_ONCE(1);
2570 /* keep c->width */
2571 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2572 break;
2573 }
2574
2575 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2576
2577 return ret;
2578}
687da132
EG		 2579
2580/*
2581 * Returns true if smps_mode_new is strictly more restrictive than
2582 * smps_mode_old.
2583 */
2584bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2585 enum ieee80211_smps_mode smps_mode_new)
2586{
2587 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2588 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2589 return false;
2590
2591 switch (smps_mode_old) {
2592 case IEEE80211_SMPS_STATIC:
2593 return false;
2594 case IEEE80211_SMPS_DYNAMIC:
2595 return smps_mode_new == IEEE80211_SMPS_STATIC;
2596 case IEEE80211_SMPS_OFF:
2597 return smps_mode_new != IEEE80211_SMPS_OFF;
2598 default:
2599 WARN_ON(1);
2600 }
2601
2602 return false;
2603}
c6da674a
CYY		 2604
2605int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2606 struct cfg80211_csa_settings *csa_settings)
2607{
2608 struct sk_buff *skb;
2609 struct ieee80211_mgmt *mgmt;
2610 struct ieee80211_local *local = sdata->local;
2611 int freq;
2612 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2613 sizeof(mgmt->u.action.u.chan_switch);
2614 u8 *pos;
2615
2616 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2617 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2618 return -EOPNOTSUPP;
2619
2620 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2621 5 + /* channel switch announcement element */
2622 3 + /* secondary channel offset element */
2623 8); /* mesh channel switch parameters element */
2624 if (!skb)
2625 return -ENOMEM;
2626
2627 skb_reserve(skb, local->tx_headroom);
2628 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2629 memset(mgmt, 0, hdr_len);
2630 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2631 IEEE80211_STYPE_ACTION);
2632
2633 eth_broadcast_addr(mgmt->da);
2634 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2635 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2636 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2637 } else {
2638 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2639 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2640 }
2641 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2642 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2643 pos = skb_put(skb, 5);
2644 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2645 *pos++ = 3; /* IE length */
2646 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2647 freq = csa_settings->chandef.chan->center_freq;
2648 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2649 *pos++ = csa_settings->count; /* count */
2650
2651 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2652 enum nl80211_channel_type ch_type;
2653
2654 skb_put(skb, 3);
2655 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2656 *pos++ = 1; /* IE length */
2657 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2658 if (ch_type == NL80211_CHAN_HT40PLUS)
2659 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2660 else
2661 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2662 }
2663
2664 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2665 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
c6da674a
CYY		 2666
2667 skb_put(skb, 8);
2668 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2669 *pos++ = 6; /* IE length */
2670 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2671 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2672 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2673 *pos++ |= csa_settings->block_tx ?
2674 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2675 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2676 pos += 2;
ca91dc97 2677 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
c6da674a 2678 pos += 2;
c6da674a
CYY		 2679 }
2680
2681 ieee80211_tx_skb(sdata, skb);
2682 return 0;
2683}
2475b1cc
MS		 2684
2685bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2686{
2687 return !(cs == NULL || cs->cipher == 0 ||
2688 cs->hdr_len < cs->pn_len + cs->pn_off ||
2689 cs->hdr_len <= cs->key_idx_off ||
2690 cs->key_idx_shift > 7 ||
2691 cs->key_idx_mask == 0);
2692}
2693
2694bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2695{
2696 int i;
2697
2698 /* Ensure we have enough iftype bitmap space for all iftype values */
2699 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2700
2701 for (i = 0; i < n; i++)
2702 if (!ieee80211_cs_valid(&cs[i]))
2703 return false;
2704
2705 return true;
2706}
2707
2708const struct ieee80211_cipher_scheme *
2709ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2710 enum nl80211_iftype iftype)
2711{
2712 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2713 int n = local->hw.n_cipher_schemes;
2714 int i;
2715 const struct ieee80211_cipher_scheme *cs = NULL;
2716
2717 for (i = 0; i < n; i++) {
2718 if (l[i].cipher == cipher) {
2719 cs = &l[i];
2720 break;
2721 }
2722 }
2723
2724 if (!cs || !(cs->iftype & BIT(iftype)))
2725 return NULL;
2726
2727 return cs;
2728}
2729
2730int ieee80211_cs_headroom(struct ieee80211_local *local,
2731 struct cfg80211_crypto_settings *crypto,
2732 enum nl80211_iftype iftype)
2733{
2734 const struct ieee80211_cipher_scheme *cs;
2735 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2736 int i;
2737
2738 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2739 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2740 iftype);
2741
2742 if (cs && headroom < cs->hdr_len)
2743 headroom = cs->hdr_len;
2744 }
2745
2746 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2747 if (cs && headroom < cs->hdr_len)
2748 headroom = cs->hdr_len;
2749
2750 return headroom;
2751}
a7022e65
FF		 2752
2753static bool
2754ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2755{
2756 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2757 int skip;
2758
2759 if (end > 0)
2760 return false;
2761
2762 /* End time is in the past, check for repetitions */
2763 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2764 if (data->count[i] < 255) {
2765 if (data->count[i] <= skip) {
2766 data->count[i] = 0;
2767 return false;
2768 }
2769
2770 data->count[i] -= skip;
2771 }
2772
2773 data->desc[i].start += skip * data->desc[i].interval;
2774
2775 return true;
2776}
2777
2778static bool
2779ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2780 s32 *offset)
2781{
2782 bool ret = false;
2783 int i;
2784
2785 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2786 s32 cur;
2787
2788 if (!data->count[i])
2789 continue;
2790
2791 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2792 ret = true;
2793
2794 cur = data->desc[i].start - tsf;
2795 if (cur > *offset)
2796 continue;
2797
2798 cur = data->desc[i].start + data->desc[i].duration - tsf;
2799 if (cur > *offset)
2800 *offset = cur;
2801 }
2802
2803 return ret;
2804}
2805
2806static u32
2807ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2808{
2809 s32 offset = 0;
2810 int tries = 0;
2811 /*
2812 * arbitrary limit, used to avoid infinite loops when combined NoA
2813 * descriptors cover the full time period.
2814 */
2815 int max_tries = 5;
2816
2817 ieee80211_extend_absent_time(data, tsf, &offset);
2818 do {
2819 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2820 break;
2821
2822 tries++;
2823 } while (tries < max_tries);
2824
2825 return offset;
2826}
2827
2828void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2829{
2830 u32 next_offset = BIT(31) - 1;
2831 int i;
2832
2833 data->absent = 0;
2834 data->has_next_tsf = false;
2835 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2836 s32 start;
2837
2838 if (!data->count[i])
2839 continue;
2840
2841 ieee80211_extend_noa_desc(data, tsf, i);
2842 start = data->desc[i].start - tsf;
2843 if (start <= 0)
2844 data->absent |= BIT(i);
2845
2846 if (next_offset > start)
2847 next_offset = start;
2848
2849 data->has_next_tsf = true;
2850 }
2851
2852 if (data->absent)
2853 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2854
2855 data->next_tsf = tsf + next_offset;
2856}
2857EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2858
2859int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2860 struct ieee80211_noa_data *data, u32 tsf)
2861{
2862 int ret = 0;
2863 int i;
2864
2865 memset(data, 0, sizeof(*data));
2866
2867 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2868 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2869
2870 if (!desc->count || !desc->duration)
2871 continue;
2872
2873 data->count[i] = desc->count;
2874 data->desc[i].start = le32_to_cpu(desc->start_time);
2875 data->desc[i].duration = le32_to_cpu(desc->duration);
2876 data->desc[i].interval = le32_to_cpu(desc->interval);
2877
2878 if (data->count[i] > 1 &&
2879 data->desc[i].interval < data->desc[i].duration)
2880 continue;
2881
2882 ieee80211_extend_noa_desc(data, tsf, i);
2883 ret++;
2884 }
2885
2886 if (ret)
2887 ieee80211_update_p2p_noa(data, tsf);
2888
2889 return ret;
2890}
2891EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
057d5f4b
TP		 2892
2893void ieee80211_recalc_dtim(struct ieee80211_local *local,
2894 struct ieee80211_sub_if_data *sdata)
2895{
2896 u64 tsf = drv_get_tsf(local, sdata);
2897 u64 dtim_count = 0;
2898 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2899 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2900 struct ps_data *ps;
2901 u8 bcns_from_dtim;
2902
2903 if (tsf == -1ULL || !beacon_int || !dtim_period)
2904 return;
2905
2906 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2907 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2908 if (!sdata->bss)
2909 return;
2910
2911 ps = &sdata->bss->ps;
2912 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2913 ps = &sdata->u.mesh.ps;
2914 } else {
2915 return;
2916 }
2917
2918 /*
2919 * actually finds last dtim_count, mac80211 will update in
2920 * __beacon_add_tim().
2921 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2922 */
2923 do_div(tsf, beacon_int);
2924 bcns_from_dtim = do_div(tsf, dtim_period);
2925 /* just had a DTIM */
2926 if (!bcns_from_dtim)
2927 dtim_count = 0;
2928 else
2929 dtim_count = dtim_period - bcns_from_dtim;
2930
2931 ps->dtim_count = dtim_count;
2932}
73de86a3
LC		 2933
2934int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2935 const struct cfg80211_chan_def *chandef,
2936 enum ieee80211_chanctx_mode chanmode,
2937 u8 radar_detect)
2938{
2939 struct ieee80211_local *local = sdata->local;
2940 struct ieee80211_sub_if_data *sdata_iter;
2941 enum nl80211_iftype iftype = sdata->wdev.iftype;
2942 int num[NUM_NL80211_IFTYPES];
2943 struct ieee80211_chanctx *ctx;
b6a55015 2944 int num_different_channels = 0;
73de86a3
LC		 2945 int total = 1;
2946
2947 lockdep_assert_held(&local->chanctx_mtx);
2948
2949 if (WARN_ON(hweight32(radar_detect) > 1))
2950 return -EINVAL;
2951
b6a55015
LC		 2952 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
2953 !chandef->chan))
73de86a3
LC		 2954 return -EINVAL;
2955
b6a55015
LC		 2956 if (chandef)
2957 num_different_channels = 1;
2958
73de86a3
LC		 2959 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
2960 return -EINVAL;
2961
2962 /* Always allow software iftypes */
2963 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
2964 if (radar_detect)
2965 return -EINVAL;
2966 return 0;
2967 }
2968
2969 memset(num, 0, sizeof(num));
2970
2971 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
2972 num[iftype] = 1;
2973
2974 list_for_each_entry(ctx, &local->chanctx_list, list) {
2975 if (ctx->conf.radar_enabled)
2976 radar_detect |= BIT(ctx->conf.def.width);
2977 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
2978 num_different_channels++;
2979 continue;
2980 }
b6a55015 2981 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
73de86a3
LC		 2982 cfg80211_chandef_compatible(chandef,
2983 &ctx->conf.def))
2984 continue;
2985 num_different_channels++;
2986 }
2987
2988 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
2989 struct wireless_dev *wdev_iter;
2990
2991 wdev_iter = &sdata_iter->wdev;
2992
2993 if (sdata_iter == sdata ||
2994 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
2995 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
2996 continue;
2997
2998 num[wdev_iter->iftype]++;
2999 total++;
3000 }
3001
3002 if (total == 1 && !radar_detect)
3003 return 0;
3004
3005 return cfg80211_check_combinations(local->hw.wiphy,
3006 num_different_channels,
3007 radar_detect, num);
3008}
6fa001bc
MK		 3009
3010static void
3011ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3012 void *data)
3013{
3014 u32 *max_num_different_channels = data;
3015
3016 *max_num_different_channels = max(*max_num_different_channels,
3017 c->num_different_channels);
3018}
3019
3020int ieee80211_max_num_channels(struct ieee80211_local *local)
3021{
3022 struct ieee80211_sub_if_data *sdata;
3023 int num[NUM_NL80211_IFTYPES] = {};
3024 struct ieee80211_chanctx *ctx;
3025 int num_different_channels = 0;
3026 u8 radar_detect = 0;
3027 u32 max_num_different_channels = 1;
3028 int err;
3029
3030 lockdep_assert_held(&local->chanctx_mtx);
3031
3032 list_for_each_entry(ctx, &local->chanctx_list, list) {
3033 num_different_channels++;
3034
3035 if (ctx->conf.radar_enabled)
3036 radar_detect |= BIT(ctx->conf.def.width);
3037 }
3038
3039 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3040 num[sdata->wdev.iftype]++;
3041
3042 err = cfg80211_iter_combinations(local->hw.wiphy,
3043 num_different_channels, radar_detect,
3044 num, ieee80211_iter_max_chans,
3045 &max_num_different_channels);
3046 if (err < 0)
3047 return err;
3048
3049 return max_num_different_channels;
3050}
Linux 6.x block layer and io_uring tree(s)