net/mac80211/util.c

   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  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * utilities for mac80211
  13  */
  14
  15 #include <net/mac80211.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/export.h>
  18 #include <linux/types.h>
  19 #include <linux/slab.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/if_arp.h>
  23 #include <linux/bitmap.h>
  24 #include <linux/crc32.h>
  25 #include <net/net_namespace.h>
  26 #include <net/cfg80211.h>
  27 #include <net/rtnetlink.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wme.h"
  34 #include "led.h"
  35 #include "wep.h"
  36
  37 /* privid for wiphys to determine whether they belong to us or not */
  38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  39
  40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  41 {
  42         struct ieee80211_local *local;
  43         BUG_ON(!wiphy);
  44
  45         local = wiphy_priv(wiphy);
  46         return &local->hw;
  47 }
  48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  49
  50 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  51 {
  52         struct sk_buff *skb;
  53         struct ieee80211_hdr *hdr;
  54
  55         skb_queue_walk(&tx->skbs, skb) {
  56                 hdr = (struct ieee80211_hdr *) skb->data;
  57                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  58         }
  59 }
  60
  61 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
  62                              int rate, int erp, int short_preamble,
  63                              int shift)
  64 {
  65         int dur;
  66
  67         /* calculate duration (in microseconds, rounded up to next higher
  68          * integer if it includes a fractional microsecond) to send frame of
  69          * len bytes (does not include FCS) at the given rate. Duration will
  70          * also include SIFS.
  71          *
  72          * rate is in 100 kbps, so divident is multiplied by 10 in the
  73          * DIV_ROUND_UP() operations.
  74          *
  75          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  76          * is assumed to be 0 otherwise.
  77          */
  78
  79         if (band == IEEE80211_BAND_5GHZ || erp) {
  80                 /*
  81                  * OFDM:
  82                  *
  83                  * N_DBPS = DATARATE x 4
  84                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  85                  *      (16 = SIGNAL time, 6 = tail bits)
  86                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  87                  *
  88                  * T_SYM = 4 usec
  89                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  90                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  91                  *      signal ext = 6 usec
  92                  */
  93                 dur = 16; /* SIFS + signal ext */
  94                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  95                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  96
  97                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  98                  *  * times 4 for 5 MHz
  99                  *  * times 2 for 10 MHz
 100                  */
 101                 dur *= 1 << shift;
 102
 103                 /* rates should already consider the channel bandwidth,
 104                  * don't apply divisor again.
 105                  */
 106                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 107                                         4 * rate); /* T_SYM x N_SYM */
 108         } else {
 109                 /*
 110                  * 802.11b or 802.11g with 802.11b compatibility:
 111                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 112                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 113                  *
 114                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 115                  * aSIFSTime = 10 usec
 116                  * aPreambleLength = 144 usec or 72 usec with short preamble
 117                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 118                  */
 119                 dur = 10; /* aSIFSTime = 10 usec */
 120                 dur += short_preamble ? (72 + 24) : (144 + 48);
 121
 122                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 123         }
 124
 125         return dur;
 126 }
 127
 128 /* Exported duration function for driver use */
 129 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 130                                         struct ieee80211_vif *vif,
 131                                         enum ieee80211_band band,
 132                                         size_t frame_len,
 133                                         struct ieee80211_rate *rate)
 134 {
 135         struct ieee80211_sub_if_data *sdata;
 136         u16 dur;
 137         int erp, shift = 0;
 138         bool short_preamble = false;
 139
 140         erp = 0;
 141         if (vif) {
 142                 sdata = vif_to_sdata(vif);
 143                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 144                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 145                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 146                 shift = ieee80211_vif_get_shift(vif);
 147         }
 148
 149         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 150                                        short_preamble, shift);
 151
 152         return cpu_to_le16(dur);
 153 }
 154 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 155
 156 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 157                               struct ieee80211_vif *vif, size_t frame_len,
 158                               const struct ieee80211_tx_info *frame_txctl)
 159 {
 160         struct ieee80211_local *local = hw_to_local(hw);
 161         struct ieee80211_rate *rate;
 162         struct ieee80211_sub_if_data *sdata;
 163         bool short_preamble;
 164         int erp, shift = 0, bitrate;
 165         u16 dur;
 166         struct ieee80211_supported_band *sband;
 167
 168         sband = local->hw.wiphy->bands[frame_txctl->band];
 169
 170         short_preamble = false;
 171
 172         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 173
 174         erp = 0;
 175         if (vif) {
 176                 sdata = vif_to_sdata(vif);
 177                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 178                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 179                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 180                 shift = ieee80211_vif_get_shift(vif);
 181         }
 182
 183         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 184
 185         /* CTS duration */
 186         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 187                                        erp, short_preamble, shift);
 188         /* Data frame duration */
 189         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 190                                         erp, short_preamble, shift);
 191         /* ACK duration */
 192         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 193                                         erp, short_preamble, shift);
 194
 195         return cpu_to_le16(dur);
 196 }
 197 EXPORT_SYMBOL(ieee80211_rts_duration);
 198
 199 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 200                                     struct ieee80211_vif *vif,
 201                                     size_t frame_len,
 202                                     const struct ieee80211_tx_info *frame_txctl)
 203 {
 204         struct ieee80211_local *local = hw_to_local(hw);
 205         struct ieee80211_rate *rate;
 206         struct ieee80211_sub_if_data *sdata;
 207         bool short_preamble;
 208         int erp, shift = 0, bitrate;
 209         u16 dur;
 210         struct ieee80211_supported_band *sband;
 211
 212         sband = local->hw.wiphy->bands[frame_txctl->band];
 213
 214         short_preamble = false;
 215
 216         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 217         erp = 0;
 218         if (vif) {
 219                 sdata = vif_to_sdata(vif);
 220                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 221                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 222                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 223                 shift = ieee80211_vif_get_shift(vif);
 224         }
 225
 226         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 227
 228         /* Data frame duration */
 229         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 230                                        erp, short_preamble, shift);
 231         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 232                 /* ACK duration */
 233                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 234                                                 erp, short_preamble, shift);
 235         }
 236
 237         return cpu_to_le16(dur);
 238 }
 239 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 240
 241 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 242 {
 243         struct ieee80211_sub_if_data *sdata;
 244         int n_acs = IEEE80211_NUM_ACS;
 245
 246         if (local->hw.queues < IEEE80211_NUM_ACS)
 247                 n_acs = 1;
 248
 249         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 250                 int ac;
 251
 252                 if (!sdata->dev)
 253                         continue;
 254
 255                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 256                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 257                         continue;
 258
 259                 for (ac = 0; ac < n_acs; ac++) {
 260                         int ac_queue = sdata->vif.hw_queue[ac];
 261
 262                         if (local->ops->wake_tx_queue &&
 263                             (atomic_read(&sdata->txqs_len[ac]) >
 264                              local->hw.txq_ac_max_pending))
 265                                 continue;
 266
 267                         if (ac_queue == queue ||
 268                             (sdata->vif.cab_queue == queue &&
 269                              local->queue_stop_reasons[ac_queue] == 0 &&
 270                              skb_queue_empty(&local->pending[ac_queue])))
 271                                 netif_wake_subqueue(sdata->dev, ac);
 272                 }
 273         }
 274 }
 275
 276 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 277                                    enum queue_stop_reason reason,
 278                                    bool refcounted)
 279 {
 280         struct ieee80211_local *local = hw_to_local(hw);
 281
 282         trace_wake_queue(local, queue, reason);
 283
 284         if (WARN_ON(queue >= hw->queues))
 285                 return;
 286
 287         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 288                 return;
 289
 290         if (!refcounted)
 291                 local->q_stop_reasons[queue][reason] = 0;
 292         else
 293                 local->q_stop_reasons[queue][reason]--;
 294
 295         if (local->q_stop_reasons[queue][reason] == 0)
 296                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 297
 298         if (local->queue_stop_reasons[queue] != 0)
 299                 /* someone still has this queue stopped */
 300                 return;
 301
 302         if (skb_queue_empty(&local->pending[queue])) {
 303                 rcu_read_lock();
 304                 ieee80211_propagate_queue_wake(local, queue);
 305                 rcu_read_unlock();
 306         } else
 307                 tasklet_schedule(&local->tx_pending_tasklet);
 308 }
 309
 310 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 311                                     enum queue_stop_reason reason,
 312                                     bool refcounted)
 313 {
 314         struct ieee80211_local *local = hw_to_local(hw);
 315         unsigned long flags;
 316
 317         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 318         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 319         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 320 }
 321
 322 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 323 {
 324         ieee80211_wake_queue_by_reason(hw, queue,
 325                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 326                                        false);
 327 }
 328 EXPORT_SYMBOL(ieee80211_wake_queue);
 329
 330 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 331                                    enum queue_stop_reason reason,
 332                                    bool refcounted)
 333 {
 334         struct ieee80211_local *local = hw_to_local(hw);
 335         struct ieee80211_sub_if_data *sdata;
 336         int n_acs = IEEE80211_NUM_ACS;
 337
 338         trace_stop_queue(local, queue, reason);
 339
 340         if (WARN_ON(queue >= hw->queues))
 341                 return;
 342
 343         if (!refcounted)
 344                 local->q_stop_reasons[queue][reason] = 1;
 345         else
 346                 local->q_stop_reasons[queue][reason]++;
 347
 348         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 349                 return;
 350
 351         if (local->hw.queues < IEEE80211_NUM_ACS)
 352                 n_acs = 1;
 353
 354         rcu_read_lock();
 355         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 356                 int ac;
 357
 358                 if (!sdata->dev)
 359                         continue;
 360
 361                 for (ac = 0; ac < n_acs; ac++) {
 362                         if (sdata->vif.hw_queue[ac] == queue ||
 363                             sdata->vif.cab_queue == queue)
 364                                 netif_stop_subqueue(sdata->dev, ac);
 365                 }
 366         }
 367         rcu_read_unlock();
 368 }
 369
 370 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 371                                     enum queue_stop_reason reason,
 372                                     bool refcounted)
 373 {
 374         struct ieee80211_local *local = hw_to_local(hw);
 375         unsigned long flags;
 376
 377         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 378         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 379         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 380 }
 381
 382 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 383 {
 384         ieee80211_stop_queue_by_reason(hw, queue,
 385                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 386                                        false);
 387 }
 388 EXPORT_SYMBOL(ieee80211_stop_queue);
 389
 390 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 391                                struct sk_buff *skb)
 392 {
 393         struct ieee80211_hw *hw = &local->hw;
 394         unsigned long flags;
 395         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 396         int queue = info->hw_queue;
 397
 398         if (WARN_ON(!info->control.vif)) {
 399                 ieee80211_free_txskb(&local->hw, skb);
 400                 return;
 401         }
 402
 403         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 404         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 405                                false);
 406         __skb_queue_tail(&local->pending[queue], skb);
 407         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 408                                false);
 409         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 410 }
 411
 412 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 413                                 struct sk_buff_head *skbs)
 414 {
 415         struct ieee80211_hw *hw = &local->hw;
 416         struct sk_buff *skb;
 417         unsigned long flags;
 418         int queue, i;
 419
 420         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 421         while ((skb = skb_dequeue(skbs))) {
 422                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 423
 424                 if (WARN_ON(!info->control.vif)) {
 425                         ieee80211_free_txskb(&local->hw, skb);
 426                         continue;
 427                 }
 428
 429                 queue = info->hw_queue;
 430
 431                 __ieee80211_stop_queue(hw, queue,
 432                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 433                                 false);
 434
 435                 __skb_queue_tail(&local->pending[queue], skb);
 436         }
 437
 438         for (i = 0; i < hw->queues; i++)
 439                 __ieee80211_wake_queue(hw, i,
 440                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 441                         false);
 442         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 443 }
 444
 445 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 446                                      unsigned long queues,
 447                                      enum queue_stop_reason reason,
 448                                      bool refcounted)
 449 {
 450         struct ieee80211_local *local = hw_to_local(hw);
 451         unsigned long flags;
 452         int i;
 453
 454         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 455
 456         for_each_set_bit(i, &queues, hw->queues)
 457                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 458
 459         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 460 }
 461
 462 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 463 {
 464         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 465                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 466                                         false);
 467 }
 468 EXPORT_SYMBOL(ieee80211_stop_queues);
 469
 470 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 471 {
 472         struct ieee80211_local *local = hw_to_local(hw);
 473         unsigned long flags;
 474         int ret;
 475
 476         if (WARN_ON(queue >= hw->queues))
 477                 return true;
 478
 479         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 480         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 481                        &local->queue_stop_reasons[queue]);
 482         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 483         return ret;
 484 }
 485 EXPORT_SYMBOL(ieee80211_queue_stopped);
 486
 487 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 488                                      unsigned long queues,
 489                                      enum queue_stop_reason reason,
 490                                      bool refcounted)
 491 {
 492         struct ieee80211_local *local = hw_to_local(hw);
 493         unsigned long flags;
 494         int i;
 495
 496         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 497
 498         for_each_set_bit(i, &queues, hw->queues)
 499                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 500
 501         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 502 }
 503
 504 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 505 {
 506         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 507                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 508                                         false);
 509 }
 510 EXPORT_SYMBOL(ieee80211_wake_queues);
 511
 512 static unsigned int
 513 ieee80211_get_vif_queues(struct ieee80211_local *local,
 514                          struct ieee80211_sub_if_data *sdata)
 515 {
 516         unsigned int queues;
 517
 518         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 519                 int ac;
 520
 521                 queues = 0;
 522
 523                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 524                         queues |= BIT(sdata->vif.hw_queue[ac]);
 525                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 526                         queues |= BIT(sdata->vif.cab_queue);
 527         } else {
 528                 /* all queues */
 529                 queues = BIT(local->hw.queues) - 1;
 530         }
 531
 532         return queues;
 533 }
 534
 535 void __ieee80211_flush_queues(struct ieee80211_local *local,
 536                               struct ieee80211_sub_if_data *sdata,
 537                               unsigned int queues, bool drop)
 538 {
 539         if (!local->ops->flush)
 540                 return;
 541
 542         /*
 543          * If no queue was set, or if the HW doesn't support
 544          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 545          */
 546         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 547                 queues = ieee80211_get_vif_queues(local, sdata);
 548
 549         ieee80211_stop_queues_by_reason(&local->hw, queues,
 550                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 551                                         false);
 552
 553         drv_flush(local, sdata, queues, drop);
 554
 555         ieee80211_wake_queues_by_reason(&local->hw, queues,
 556                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 557                                         false);
 558 }
 559
 560 void ieee80211_flush_queues(struct ieee80211_local *local,
 561                             struct ieee80211_sub_if_data *sdata, bool drop)
 562 {
 563         __ieee80211_flush_queues(local, sdata, 0, drop);
 564 }
 565
 566 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 567                                struct ieee80211_sub_if_data *sdata,
 568                                enum queue_stop_reason reason)
 569 {
 570         ieee80211_stop_queues_by_reason(&local->hw,
 571                                         ieee80211_get_vif_queues(local, sdata),
 572                                         reason, true);
 573 }
 574
 575 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 576                                struct ieee80211_sub_if_data *sdata,
 577                                enum queue_stop_reason reason)
 578 {
 579         ieee80211_wake_queues_by_reason(&local->hw,
 580                                         ieee80211_get_vif_queues(local, sdata),
 581                                         reason, true);
 582 }
 583
 584 static void __iterate_interfaces(struct ieee80211_local *local,
 585                                  u32 iter_flags,
 586                                  void (*iterator)(void *data, u8 *mac,
 587                                                   struct ieee80211_vif *vif),
 588                                  void *data)
 589 {
 590         struct ieee80211_sub_if_data *sdata;
 591         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 592
 593         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 594                 switch (sdata->vif.type) {
 595                 case NL80211_IFTYPE_MONITOR:
 596                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 597                                 continue;
 598                         break;
 599                 case NL80211_IFTYPE_AP_VLAN:
 600                         continue;
 601                 default:
 602                         break;
 603                 }
 604                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 605                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 606                         continue;
 607                 if (ieee80211_sdata_running(sdata) || !active_only)
 608                         iterator(data, sdata->vif.addr,
 609                                  &sdata->vif);
 610         }
 611
 612         sdata = rcu_dereference_check(local->monitor_sdata,
 613                                       lockdep_is_held(&local->iflist_mtx) ||
 614                                       lockdep_rtnl_is_held());
 615         if (sdata &&
 616             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 617              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 618                 iterator(data, sdata->vif.addr, &sdata->vif);
 619 }
 620
 621 void ieee80211_iterate_interfaces(
 622         struct ieee80211_hw *hw, u32 iter_flags,
 623         void (*iterator)(void *data, u8 *mac,
 624                          struct ieee80211_vif *vif),
 625         void *data)
 626 {
 627         struct ieee80211_local *local = hw_to_local(hw);
 628
 629         mutex_lock(&local->iflist_mtx);
 630         __iterate_interfaces(local, iter_flags, iterator, data);
 631         mutex_unlock(&local->iflist_mtx);
 632 }
 633 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 634
 635 void ieee80211_iterate_active_interfaces_atomic(
 636         struct ieee80211_hw *hw, u32 iter_flags,
 637         void (*iterator)(void *data, u8 *mac,
 638                          struct ieee80211_vif *vif),
 639         void *data)
 640 {
 641         struct ieee80211_local *local = hw_to_local(hw);
 642
 643         rcu_read_lock();
 644         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 645                              iterator, data);
 646         rcu_read_unlock();
 647 }
 648 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 649
 650 void ieee80211_iterate_active_interfaces_rtnl(
 651         struct ieee80211_hw *hw, u32 iter_flags,
 652         void (*iterator)(void *data, u8 *mac,
 653                          struct ieee80211_vif *vif),
 654         void *data)
 655 {
 656         struct ieee80211_local *local = hw_to_local(hw);
 657
 658         ASSERT_RTNL();
 659
 660         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 661                              iterator, data);
 662 }
 663 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 664
 665 static void __iterate_stations(struct ieee80211_local *local,
 666                                void (*iterator)(void *data,
 667                                                 struct ieee80211_sta *sta),
 668                                void *data)
 669 {
 670         struct sta_info *sta;
 671
 672         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 673                 if (!sta->uploaded)
 674                         continue;
 675
 676                 iterator(data, &sta->sta);
 677         }
 678 }
 679
 680 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 681                         void (*iterator)(void *data,
 682                                          struct ieee80211_sta *sta),
 683                         void *data)
 684 {
 685         struct ieee80211_local *local = hw_to_local(hw);
 686
 687         rcu_read_lock();
 688         __iterate_stations(local, iterator, data);
 689         rcu_read_unlock();
 690 }
 691 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 692
 693 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 694 {
 695         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 696
 697         if (!ieee80211_sdata_running(sdata) ||
 698             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 699                 return NULL;
 700         return &sdata->vif;
 701 }
 702 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 703
 704 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 705 {
 706         struct ieee80211_sub_if_data *sdata;
 707
 708         if (!vif)
 709                 return NULL;
 710
 711         sdata = vif_to_sdata(vif);
 712
 713         if (!ieee80211_sdata_running(sdata) ||
 714             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 715                 return NULL;
 716
 717         return &sdata->wdev;
 718 }
 719 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 720
 721 /*
 722  * Nothing should have been stuffed into the workqueue during
 723  * the suspend->resume cycle. Since we can't check each caller
 724  * of this function if we are already quiescing / suspended,
 725  * check here and don't WARN since this can actually happen when
 726  * the rx path (for example) is racing against __ieee80211_suspend
 727  * and suspending / quiescing was set after the rx path checked
 728  * them.
 729  */
 730 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 731 {
 732         if (local->quiescing || (local->suspended && !local->resuming)) {
 733                 pr_warn("queueing ieee80211 work while going to suspend\n");
 734                 return false;
 735         }
 736
 737         return true;
 738 }
 739
 740 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 741 {
 742         struct ieee80211_local *local = hw_to_local(hw);
 743
 744         if (!ieee80211_can_queue_work(local))
 745                 return;
 746
 747         queue_work(local->workqueue, work);
 748 }
 749 EXPORT_SYMBOL(ieee80211_queue_work);
 750
 751 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 752                                   struct delayed_work *dwork,
 753                                   unsigned long delay)
 754 {
 755         struct ieee80211_local *local = hw_to_local(hw);
 756
 757         if (!ieee80211_can_queue_work(local))
 758                 return;
 759
 760         queue_delayed_work(local->workqueue, dwork, delay);
 761 }
 762 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 763
 764 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 765                                struct ieee802_11_elems *elems,
 766                                u64 filter, u32 crc)
 767 {
 768         size_t left = len;
 769         const u8 *pos = start;
 770         bool calc_crc = filter != 0;
 771         DECLARE_BITMAP(seen_elems, 256);
 772         const u8 *ie;
 773
 774         bitmap_zero(seen_elems, 256);
 775         memset(elems, 0, sizeof(*elems));
 776         elems->ie_start = start;
 777         elems->total_len = len;
 778
 779         while (left >= 2) {
 780                 u8 id, elen;
 781                 bool elem_parse_failed;
 782
 783                 id = *pos++;
 784                 elen = *pos++;
 785                 left -= 2;
 786
 787                 if (elen > left) {
 788                         elems->parse_error = true;
 789                         break;
 790                 }
 791
 792                 switch (id) {
 793                 case WLAN_EID_SSID:
 794                 case WLAN_EID_SUPP_RATES:
 795                 case WLAN_EID_FH_PARAMS:
 796                 case WLAN_EID_DS_PARAMS:
 797                 case WLAN_EID_CF_PARAMS:
 798                 case WLAN_EID_TIM:
 799                 case WLAN_EID_IBSS_PARAMS:
 800                 case WLAN_EID_CHALLENGE:
 801                 case WLAN_EID_RSN:
 802                 case WLAN_EID_ERP_INFO:
 803                 case WLAN_EID_EXT_SUPP_RATES:
 804                 case WLAN_EID_HT_CAPABILITY:
 805                 case WLAN_EID_HT_OPERATION:
 806                 case WLAN_EID_VHT_CAPABILITY:
 807                 case WLAN_EID_VHT_OPERATION:
 808                 case WLAN_EID_MESH_ID:
 809                 case WLAN_EID_MESH_CONFIG:
 810                 case WLAN_EID_PEER_MGMT:
 811                 case WLAN_EID_PREQ:
 812                 case WLAN_EID_PREP:
 813                 case WLAN_EID_PERR:
 814                 case WLAN_EID_RANN:
 815                 case WLAN_EID_CHANNEL_SWITCH:
 816                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 817                 case WLAN_EID_COUNTRY:
 818                 case WLAN_EID_PWR_CONSTRAINT:
 819                 case WLAN_EID_TIMEOUT_INTERVAL:
 820                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 821                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 822                 case WLAN_EID_CHAN_SWITCH_PARAM:
 823                 case WLAN_EID_EXT_CAPABILITY:
 824                 case WLAN_EID_CHAN_SWITCH_TIMING:
 825                 case WLAN_EID_LINK_ID:
 826                 /*
 827                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 828                  * that if the content gets bigger it might be needed more than once
 829                  */
 830                         if (test_bit(id, seen_elems)) {
 831                                 elems->parse_error = true;
 832                                 left -= elen;
 833                                 pos += elen;
 834                                 continue;
 835                         }
 836                         break;
 837                 }
 838
 839                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 840                         crc = crc32_be(crc, pos - 2, elen + 2);
 841
 842                 elem_parse_failed = false;
 843
 844                 switch (id) {
 845                 case WLAN_EID_LINK_ID:
 846                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 847                                 elem_parse_failed = true;
 848                                 break;
 849                         }
 850                         elems->lnk_id = (void *)(pos - 2);
 851                         break;
 852                 case WLAN_EID_CHAN_SWITCH_TIMING:
 853                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 854                                 elem_parse_failed = true;
 855                                 break;
 856                         }
 857                         elems->ch_sw_timing = (void *)pos;
 858                         break;
 859                 case WLAN_EID_EXT_CAPABILITY:
 860                         elems->ext_capab = pos;
 861                         elems->ext_capab_len = elen;
 862                         break;
 863                 case WLAN_EID_SSID:
 864                         elems->ssid = pos;
 865                         elems->ssid_len = elen;
 866                         break;
 867                 case WLAN_EID_SUPP_RATES:
 868                         elems->supp_rates = pos;
 869                         elems->supp_rates_len = elen;
 870                         break;
 871                 case WLAN_EID_DS_PARAMS:
 872                         if (elen >= 1)
 873                                 elems->ds_params = pos;
 874                         else
 875                                 elem_parse_failed = true;
 876                         break;
 877                 case WLAN_EID_TIM:
 878                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 879                                 elems->tim = (void *)pos;
 880                                 elems->tim_len = elen;
 881                         } else
 882                                 elem_parse_failed = true;
 883                         break;
 884                 case WLAN_EID_CHALLENGE:
 885                         elems->challenge = pos;
 886                         elems->challenge_len = elen;
 887                         break;
 888                 case WLAN_EID_VENDOR_SPECIFIC:
 889                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 890                             pos[2] == 0xf2) {
 891                                 /* Microsoft OUI (00:50:F2) */
 892
 893                                 if (calc_crc)
 894                                         crc = crc32_be(crc, pos - 2, elen + 2);
 895
 896                                 if (elen >= 5 && pos[3] == 2) {
 897                                         /* OUI Type 2 - WMM IE */
 898                                         if (pos[4] == 0) {
 899                                                 elems->wmm_info = pos;
 900                                                 elems->wmm_info_len = elen;
 901                                         } else if (pos[4] == 1) {
 902                                                 elems->wmm_param = pos;
 903                                                 elems->wmm_param_len = elen;
 904                                         }
 905                                 }
 906                         }
 907                         break;
 908                 case WLAN_EID_RSN:
 909                         elems->rsn = pos;
 910                         elems->rsn_len = elen;
 911                         break;
 912                 case WLAN_EID_ERP_INFO:
 913                         if (elen >= 1)
 914                                 elems->erp_info = pos;
 915                         else
 916                                 elem_parse_failed = true;
 917                         break;
 918                 case WLAN_EID_EXT_SUPP_RATES:
 919                         elems->ext_supp_rates = pos;
 920                         elems->ext_supp_rates_len = elen;
 921                         break;
 922                 case WLAN_EID_HT_CAPABILITY:
 923                         if (elen >= sizeof(struct ieee80211_ht_cap))
 924                                 elems->ht_cap_elem = (void *)pos;
 925                         else
 926                                 elem_parse_failed = true;
 927                         break;
 928                 case WLAN_EID_HT_OPERATION:
 929                         if (elen >= sizeof(struct ieee80211_ht_operation))
 930                                 elems->ht_operation = (void *)pos;
 931                         else
 932                                 elem_parse_failed = true;
 933                         break;
 934                 case WLAN_EID_VHT_CAPABILITY:
 935                         if (elen >= sizeof(struct ieee80211_vht_cap))
 936                                 elems->vht_cap_elem = (void *)pos;
 937                         else
 938                                 elem_parse_failed = true;
 939                         break;
 940                 case WLAN_EID_VHT_OPERATION:
 941                         if (elen >= sizeof(struct ieee80211_vht_operation))
 942                                 elems->vht_operation = (void *)pos;
 943                         else
 944                                 elem_parse_failed = true;
 945                         break;
 946                 case WLAN_EID_OPMODE_NOTIF:
 947                         if (elen > 0)
 948                                 elems->opmode_notif = pos;
 949                         else
 950                                 elem_parse_failed = true;
 951                         break;
 952                 case WLAN_EID_MESH_ID:
 953                         elems->mesh_id = pos;
 954                         elems->mesh_id_len = elen;
 955                         break;
 956                 case WLAN_EID_MESH_CONFIG:
 957                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 958                                 elems->mesh_config = (void *)pos;
 959                         else
 960                                 elem_parse_failed = true;
 961                         break;
 962                 case WLAN_EID_PEER_MGMT:
 963                         elems->peering = pos;
 964                         elems->peering_len = elen;
 965                         break;
 966                 case WLAN_EID_MESH_AWAKE_WINDOW:
 967                         if (elen >= 2)
 968                                 elems->awake_window = (void *)pos;
 969                         break;
 970                 case WLAN_EID_PREQ:
 971                         elems->preq = pos;
 972                         elems->preq_len = elen;
 973                         break;
 974                 case WLAN_EID_PREP:
 975                         elems->prep = pos;
 976                         elems->prep_len = elen;
 977                         break;
 978                 case WLAN_EID_PERR:
 979                         elems->perr = pos;
 980                         elems->perr_len = elen;
 981                         break;
 982                 case WLAN_EID_RANN:
 983                         if (elen >= sizeof(struct ieee80211_rann_ie))
 984                                 elems->rann = (void *)pos;
 985                         else
 986                                 elem_parse_failed = true;
 987                         break;
 988                 case WLAN_EID_CHANNEL_SWITCH:
 989                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 990                                 elem_parse_failed = true;
 991                                 break;
 992                         }
 993                         elems->ch_switch_ie = (void *)pos;
 994                         break;
 995                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 996                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
 997                                 elem_parse_failed = true;
 998                                 break;
 999                         }
1000                         elems->ext_chansw_ie = (void *)pos;
1001                         break;
1002                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1003                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1004                                 elem_parse_failed = true;
1005                                 break;
1006                         }
1007                         elems->sec_chan_offs = (void *)pos;
1008                         break;
1009                 case WLAN_EID_CHAN_SWITCH_PARAM:
1010                         if (elen !=
1011                             sizeof(*elems->mesh_chansw_params_ie)) {
1012                                 elem_parse_failed = true;
1013                                 break;
1014                         }
1015                         elems->mesh_chansw_params_ie = (void *)pos;
1016                         break;
1017                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1018                         if (!action ||
1019                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1020                                 elem_parse_failed = true;
1021                                 break;
1022                         }
1023                         elems->wide_bw_chansw_ie = (void *)pos;
1024                         break;
1025                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1026                         if (action) {
1027                                 elem_parse_failed = true;
1028                                 break;
1029                         }
1030                         /*
1031                          * This is a bit tricky, but as we only care about
1032                          * the wide bandwidth channel switch element, so
1033                          * just parse it out manually.
1034                          */
1035                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1036                                               pos, elen);
1037                         if (ie) {
1038                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1039                                         elems->wide_bw_chansw_ie =
1040                                                 (void *)(ie + 2);
1041                                 else
1042                                         elem_parse_failed = true;
1043                         }
1044                         break;
1045                 case WLAN_EID_COUNTRY:
1046                         elems->country_elem = pos;
1047                         elems->country_elem_len = elen;
1048                         break;
1049                 case WLAN_EID_PWR_CONSTRAINT:
1050                         if (elen != 1) {
1051                                 elem_parse_failed = true;
1052                                 break;
1053                         }
1054                         elems->pwr_constr_elem = pos;
1055                         break;
1056                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1057                         /* Lots of different options exist, but we only care
1058                          * about the Dynamic Transmit Power Control element.
1059                          * First check for the Cisco OUI, then for the DTPC
1060                          * tag (0x00).
1061                          */
1062                         if (elen < 4) {
1063                                 elem_parse_failed = true;
1064                                 break;
1065                         }
1066
1067                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1068                             pos[2] != 0x96 || pos[3] != 0x00)
1069                                 break;
1070
1071                         if (elen != 6) {
1072                                 elem_parse_failed = true;
1073                                 break;
1074                         }
1075
1076                         if (calc_crc)
1077                                 crc = crc32_be(crc, pos - 2, elen + 2);
1078
1079                         elems->cisco_dtpc_elem = pos;
1080                         break;
1081                 case WLAN_EID_TIMEOUT_INTERVAL:
1082                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1083                                 elems->timeout_int = (void *)pos;
1084                         else
1085                                 elem_parse_failed = true;
1086                         break;
1087                 default:
1088                         break;
1089                 }
1090
1091                 if (elem_parse_failed)
1092                         elems->parse_error = true;
1093                 else
1094                         __set_bit(id, seen_elems);
1095
1096                 left -= elen;
1097                 pos += elen;
1098         }
1099
1100         if (left != 0)
1101                 elems->parse_error = true;
1102
1103         return crc;
1104 }
1105
1106 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1107                                bool bss_notify)
1108 {
1109         struct ieee80211_local *local = sdata->local;
1110         struct ieee80211_tx_queue_params qparam;
1111         struct ieee80211_chanctx_conf *chanctx_conf;
1112         int ac;
1113         bool use_11b, enable_qos;
1114         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1115         int aCWmin, aCWmax;
1116
1117         if (!local->ops->conf_tx)
1118                 return;
1119
1120         if (local->hw.queues < IEEE80211_NUM_ACS)
1121                 return;
1122
1123         memset(&qparam, 0, sizeof(qparam));
1124
1125         rcu_read_lock();
1126         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1127         use_11b = (chanctx_conf &&
1128                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1129                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1130         rcu_read_unlock();
1131
1132         /*
1133          * By default disable QoS in STA mode for old access points, which do
1134          * not support 802.11e. New APs will provide proper queue parameters,
1135          * that we will configure later.
1136          */
1137         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1138
1139         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1140
1141         /* Set defaults according to 802.11-2007 Table 7-37 */
1142         aCWmax = 1023;
1143         if (use_11b)
1144                 aCWmin = 31;
1145         else
1146                 aCWmin = 15;
1147
1148         /* Confiure old 802.11b/g medium access rules. */
1149         qparam.cw_max = aCWmax;
1150         qparam.cw_min = aCWmin;
1151         qparam.txop = 0;
1152         qparam.aifs = 2;
1153
1154         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1155                 /* Update if QoS is enabled. */
1156                 if (enable_qos) {
1157                         switch (ac) {
1158                         case IEEE80211_AC_BK:
1159                                 qparam.cw_max = aCWmax;
1160                                 qparam.cw_min = aCWmin;
1161                                 qparam.txop = 0;
1162                                 if (is_ocb)
1163                                         qparam.aifs = 9;
1164                                 else
1165                                         qparam.aifs = 7;
1166                                 break;
1167                         /* never happens but let's not leave undefined */
1168                         default:
1169                         case IEEE80211_AC_BE:
1170                                 qparam.cw_max = aCWmax;
1171                                 qparam.cw_min = aCWmin;
1172                                 qparam.txop = 0;
1173                                 if (is_ocb)
1174                                         qparam.aifs = 6;
1175                                 else
1176                                         qparam.aifs = 3;
1177                                 break;
1178                         case IEEE80211_AC_VI:
1179                                 qparam.cw_max = aCWmin;
1180                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1181                                 if (is_ocb)
1182                                         qparam.txop = 0;
1183                                 else if (use_11b)
1184                                         qparam.txop = 6016/32;
1185                                 else
1186                                         qparam.txop = 3008/32;
1187
1188                                 if (is_ocb)
1189                                         qparam.aifs = 3;
1190                                 else
1191                                         qparam.aifs = 2;
1192                                 break;
1193                         case IEEE80211_AC_VO:
1194                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1195                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1196                                 if (is_ocb)
1197                                         qparam.txop = 0;
1198                                 else if (use_11b)
1199                                         qparam.txop = 3264/32;
1200                                 else
1201                                         qparam.txop = 1504/32;
1202                                 qparam.aifs = 2;
1203                                 break;
1204                         }
1205                 }
1206
1207                 qparam.uapsd = false;
1208
1209                 sdata->tx_conf[ac] = qparam;
1210                 drv_conf_tx(local, sdata, ac, &qparam);
1211         }
1212
1213         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1214             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1215                 sdata->vif.bss_conf.qos = enable_qos;
1216                 if (bss_notify)
1217                         ieee80211_bss_info_change_notify(sdata,
1218                                                          BSS_CHANGED_QOS);
1219         }
1220 }
1221
1222 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1223                          u16 transaction, u16 auth_alg, u16 status,
1224                          const u8 *extra, size_t extra_len, const u8 *da,
1225                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1226                          u32 tx_flags)
1227 {
1228         struct ieee80211_local *local = sdata->local;
1229         struct sk_buff *skb;
1230         struct ieee80211_mgmt *mgmt;
1231         int err;
1232
1233         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1234         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1235                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1236         if (!skb)
1237                 return;
1238
1239         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1240
1241         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1242         memset(mgmt, 0, 24 + 6);
1243         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1244                                           IEEE80211_STYPE_AUTH);
1245         memcpy(mgmt->da, da, ETH_ALEN);
1246         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1247         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1248         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1249         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1250         mgmt->u.auth.status_code = cpu_to_le16(status);
1251         if (extra)
1252                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1253
1254         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1255                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1256                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1257                 WARN_ON(err);
1258         }
1259
1260         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1261                                         tx_flags;
1262         ieee80211_tx_skb(sdata, skb);
1263 }
1264
1265 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1266                                     const u8 *bssid, u16 stype, u16 reason,
1267                                     bool send_frame, u8 *frame_buf)
1268 {
1269         struct ieee80211_local *local = sdata->local;
1270         struct sk_buff *skb;
1271         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1272
1273         /* build frame */
1274         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1275         mgmt->duration = 0; /* initialize only */
1276         mgmt->seq_ctrl = 0; /* initialize only */
1277         memcpy(mgmt->da, bssid, ETH_ALEN);
1278         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1279         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1280         /* u.deauth.reason_code == u.disassoc.reason_code */
1281         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1282
1283         if (send_frame) {
1284                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1285                                     IEEE80211_DEAUTH_FRAME_LEN);
1286                 if (!skb)
1287                         return;
1288
1289                 skb_reserve(skb, local->hw.extra_tx_headroom);
1290
1291                 /* copy in frame */
1292                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1293                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1294
1295                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1296                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1297                         IEEE80211_SKB_CB(skb)->flags |=
1298                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1299
1300                 ieee80211_tx_skb(sdata, skb);
1301         }
1302 }
1303
1304 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1305                                          u8 *buffer, size_t buffer_len,
1306                                          const u8 *ie, size_t ie_len,
1307                                          enum ieee80211_band band,
1308                                          u32 rate_mask,
1309                                          struct cfg80211_chan_def *chandef,
1310                                          size_t *offset)
1311 {
1312         struct ieee80211_supported_band *sband;
1313         u8 *pos = buffer, *end = buffer + buffer_len;
1314         size_t noffset;
1315         int supp_rates_len, i;
1316         u8 rates[32];
1317         int num_rates;
1318         int ext_rates_len;
1319         int shift;
1320         u32 rate_flags;
1321         bool have_80mhz = false;
1322
1323         *offset = 0;
1324
1325         sband = local->hw.wiphy->bands[band];
1326         if (WARN_ON_ONCE(!sband))
1327                 return 0;
1328
1329         rate_flags = ieee80211_chandef_rate_flags(chandef);
1330         shift = ieee80211_chandef_get_shift(chandef);
1331
1332         num_rates = 0;
1333         for (i = 0; i < sband->n_bitrates; i++) {
1334                 if ((BIT(i) & rate_mask) == 0)
1335                         continue; /* skip rate */
1336                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1337                         continue;
1338
1339                 rates[num_rates++] =
1340                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1341                                           (1 << shift) * 5);
1342         }
1343
1344         supp_rates_len = min_t(int, num_rates, 8);
1345
1346         if (end - pos < 2 + supp_rates_len)
1347                 goto out_err;
1348         *pos++ = WLAN_EID_SUPP_RATES;
1349         *pos++ = supp_rates_len;
1350         memcpy(pos, rates, supp_rates_len);
1351         pos += supp_rates_len;
1352
1353         /* insert "request information" if in custom IEs */
1354         if (ie && ie_len) {
1355                 static const u8 before_extrates[] = {
1356                         WLAN_EID_SSID,
1357                         WLAN_EID_SUPP_RATES,
1358                         WLAN_EID_REQUEST,
1359                 };
1360                 noffset = ieee80211_ie_split(ie, ie_len,
1361                                              before_extrates,
1362                                              ARRAY_SIZE(before_extrates),
1363                                              *offset);
1364                 if (end - pos < noffset - *offset)
1365                         goto out_err;
1366                 memcpy(pos, ie + *offset, noffset - *offset);
1367                 pos += noffset - *offset;
1368                 *offset = noffset;
1369         }
1370
1371         ext_rates_len = num_rates - supp_rates_len;
1372         if (ext_rates_len > 0) {
1373                 if (end - pos < 2 + ext_rates_len)
1374                         goto out_err;
1375                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1376                 *pos++ = ext_rates_len;
1377                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1378                 pos += ext_rates_len;
1379         }
1380
1381         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1382                 if (end - pos < 3)
1383                         goto out_err;
1384                 *pos++ = WLAN_EID_DS_PARAMS;
1385                 *pos++ = 1;
1386                 *pos++ = ieee80211_frequency_to_channel(
1387                                 chandef->chan->center_freq);
1388         }
1389
1390         /* insert custom IEs that go before HT */
1391         if (ie && ie_len) {
1392                 static const u8 before_ht[] = {
1393                         WLAN_EID_SSID,
1394                         WLAN_EID_SUPP_RATES,
1395                         WLAN_EID_REQUEST,
1396                         WLAN_EID_EXT_SUPP_RATES,
1397                         WLAN_EID_DS_PARAMS,
1398                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1399                 };
1400                 noffset = ieee80211_ie_split(ie, ie_len,
1401                                              before_ht, ARRAY_SIZE(before_ht),
1402                                              *offset);
1403                 if (end - pos < noffset - *offset)
1404                         goto out_err;
1405                 memcpy(pos, ie + *offset, noffset - *offset);
1406                 pos += noffset - *offset;
1407                 *offset = noffset;
1408         }
1409
1410         if (sband->ht_cap.ht_supported) {
1411                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1412                         goto out_err;
1413                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1414                                                 sband->ht_cap.cap);
1415         }
1416
1417         /*
1418          * If adding more here, adjust code in main.c
1419          * that calculates local->scan_ies_len.
1420          */
1421
1422         /* insert custom IEs that go before VHT */
1423         if (ie && ie_len) {
1424                 static const u8 before_vht[] = {
1425                         WLAN_EID_SSID,
1426                         WLAN_EID_SUPP_RATES,
1427                         WLAN_EID_REQUEST,
1428                         WLAN_EID_EXT_SUPP_RATES,
1429                         WLAN_EID_DS_PARAMS,
1430                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1431                         WLAN_EID_HT_CAPABILITY,
1432                         WLAN_EID_BSS_COEX_2040,
1433                         WLAN_EID_EXT_CAPABILITY,
1434                         WLAN_EID_SSID_LIST,
1435                         WLAN_EID_CHANNEL_USAGE,
1436                         WLAN_EID_INTERWORKING,
1437                         /* mesh ID can't happen here */
1438                         /* 60 GHz can't happen here right now */
1439                 };
1440                 noffset = ieee80211_ie_split(ie, ie_len,
1441                                              before_vht, ARRAY_SIZE(before_vht),
1442                                              *offset);
1443                 if (end - pos < noffset - *offset)
1444                         goto out_err;
1445                 memcpy(pos, ie + *offset, noffset - *offset);
1446                 pos += noffset - *offset;
1447                 *offset = noffset;
1448         }
1449
1450         /* Check if any channel in this sband supports at least 80 MHz */
1451         for (i = 0; i < sband->n_channels; i++) {
1452                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1453                                                 IEEE80211_CHAN_NO_80MHZ))
1454                         continue;
1455
1456                 have_80mhz = true;
1457                 break;
1458         }
1459
1460         if (sband->vht_cap.vht_supported && have_80mhz) {
1461                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1462                         goto out_err;
1463                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1464                                                  sband->vht_cap.cap);
1465         }
1466
1467         return pos - buffer;
1468  out_err:
1469         WARN_ONCE(1, "not enough space for preq IEs\n");
1470         return pos - buffer;
1471 }
1472
1473 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1474                              size_t buffer_len,
1475                              struct ieee80211_scan_ies *ie_desc,
1476                              const u8 *ie, size_t ie_len,
1477                              u8 bands_used, u32 *rate_masks,
1478                              struct cfg80211_chan_def *chandef)
1479 {
1480         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1481         int i;
1482
1483         memset(ie_desc, 0, sizeof(*ie_desc));
1484
1485         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1486                 if (bands_used & BIT(i)) {
1487                         pos += ieee80211_build_preq_ies_band(local,
1488                                                              buffer + pos,
1489                                                              buffer_len - pos,
1490                                                              ie, ie_len, i,
1491                                                              rate_masks[i],
1492                                                              chandef,
1493                                                              &custom_ie_offset);
1494                         ie_desc->ies[i] = buffer + old_pos;
1495                         ie_desc->len[i] = pos - old_pos;
1496                         old_pos = pos;
1497                 }
1498         }
1499
1500         /* add any remaining custom IEs */
1501         if (ie && ie_len) {
1502                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1503                               "not enough space for preq custom IEs\n"))
1504                         return pos;
1505                 memcpy(buffer + pos, ie + custom_ie_offset,
1506                        ie_len - custom_ie_offset);
1507                 ie_desc->common_ies = buffer + pos;
1508                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1509                 pos += ie_len - custom_ie_offset;
1510         }
1511
1512         return pos;
1513 };
1514
1515 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1516                                           const u8 *src, const u8 *dst,
1517                                           u32 ratemask,
1518                                           struct ieee80211_channel *chan,
1519                                           const u8 *ssid, size_t ssid_len,
1520                                           const u8 *ie, size_t ie_len,
1521                                           bool directed)
1522 {
1523         struct ieee80211_local *local = sdata->local;
1524         struct cfg80211_chan_def chandef;
1525         struct sk_buff *skb;
1526         struct ieee80211_mgmt *mgmt;
1527         int ies_len;
1528         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1529         struct ieee80211_scan_ies dummy_ie_desc;
1530
1531         /*
1532          * Do not send DS Channel parameter for directed probe requests
1533          * in order to maximize the chance that we get a response.  Some
1534          * badly-behaved APs don't respond when this parameter is included.
1535          */
1536         chandef.width = sdata->vif.bss_conf.chandef.width;
1537         if (directed)
1538                 chandef.chan = NULL;
1539         else
1540                 chandef.chan = chan;
1541
1542         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1543                                      100 + ie_len);
1544         if (!skb)
1545                 return NULL;
1546
1547         rate_masks[chan->band] = ratemask;
1548         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1549                                            skb_tailroom(skb), &dummy_ie_desc,
1550                                            ie, ie_len, BIT(chan->band),
1551                                            rate_masks, &chandef);
1552         skb_put(skb, ies_len);
1553
1554         if (dst) {
1555                 mgmt = (struct ieee80211_mgmt *) skb->data;
1556                 memcpy(mgmt->da, dst, ETH_ALEN);
1557                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1558         }
1559
1560         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1561
1562         return skb;
1563 }
1564
1565 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1566                               const u8 *src, const u8 *dst,
1567                               const u8 *ssid, size_t ssid_len,
1568                               const u8 *ie, size_t ie_len,
1569                               u32 ratemask, bool directed, u32 tx_flags,
1570                               struct ieee80211_channel *channel, bool scan)
1571 {
1572         struct sk_buff *skb;
1573
1574         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1575                                         ssid, ssid_len,
1576                                         ie, ie_len, directed);
1577         if (skb) {
1578                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1579                 if (scan)
1580                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1581                 else
1582                         ieee80211_tx_skb(sdata, skb);
1583         }
1584 }
1585
1586 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1587                             struct ieee802_11_elems *elems,
1588                             enum ieee80211_band band, u32 *basic_rates)
1589 {
1590         struct ieee80211_supported_band *sband;
1591         size_t num_rates;
1592         u32 supp_rates, rate_flags;
1593         int i, j, shift;
1594         sband = sdata->local->hw.wiphy->bands[band];
1595
1596         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1597         shift = ieee80211_vif_get_shift(&sdata->vif);
1598
1599         if (WARN_ON(!sband))
1600                 return 1;
1601
1602         num_rates = sband->n_bitrates;
1603         supp_rates = 0;
1604         for (i = 0; i < elems->supp_rates_len +
1605                      elems->ext_supp_rates_len; i++) {
1606                 u8 rate = 0;
1607                 int own_rate;
1608                 bool is_basic;
1609                 if (i < elems->supp_rates_len)
1610                         rate = elems->supp_rates[i];
1611                 else if (elems->ext_supp_rates)
1612                         rate = elems->ext_supp_rates
1613                                 [i - elems->supp_rates_len];
1614                 own_rate = 5 * (rate & 0x7f);
1615                 is_basic = !!(rate & 0x80);
1616
1617                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1618                         continue;
1619
1620                 for (j = 0; j < num_rates; j++) {
1621                         int brate;
1622                         if ((rate_flags & sband->bitrates[j].flags)
1623                             != rate_flags)
1624                                 continue;
1625
1626                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1627                                              1 << shift);
1628
1629                         if (brate == own_rate) {
1630                                 supp_rates |= BIT(j);
1631                                 if (basic_rates && is_basic)
1632                                         *basic_rates |= BIT(j);
1633                         }
1634                 }
1635         }
1636         return supp_rates;
1637 }
1638
1639 void ieee80211_stop_device(struct ieee80211_local *local)
1640 {
1641         ieee80211_led_radio(local, false);
1642         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1643
1644         cancel_work_sync(&local->reconfig_filter);
1645
1646         flush_workqueue(local->workqueue);
1647         drv_stop(local);
1648 }
1649
1650 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1651 {
1652         struct ieee80211_sub_if_data *sdata;
1653         struct ieee80211_chanctx *ctx;
1654
1655         /*
1656          * We get here if during resume the device can't be restarted properly.
1657          * We might also get here if this happens during HW reset, which is a
1658          * slightly different situation and we need to drop all connections in
1659          * the latter case.
1660          *
1661          * Ask cfg80211 to turn off all interfaces, this will result in more
1662          * warnings but at least we'll then get into a clean stopped state.
1663          */
1664
1665         local->resuming = false;
1666         local->suspended = false;
1667         local->started = false;
1668         local->in_reconfig = false;
1669
1670         /* scheduled scan clearly can't be running any more, but tell
1671          * cfg80211 and clear local state
1672          */
1673         ieee80211_sched_scan_end(local);
1674
1675         list_for_each_entry(sdata, &local->interfaces, list)
1676                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1677
1678         /* Mark channel contexts as not being in the driver any more to avoid
1679          * removing them from the driver during the shutdown process...
1680          */
1681         mutex_lock(&local->chanctx_mtx);
1682         list_for_each_entry(ctx, &local->chanctx_list, list)
1683                 ctx->driver_present = false;
1684         mutex_unlock(&local->chanctx_mtx);
1685
1686         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1687 }
1688
1689 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1690                                      struct ieee80211_sub_if_data *sdata)
1691 {
1692         struct ieee80211_chanctx_conf *conf;
1693         struct ieee80211_chanctx *ctx;
1694
1695         if (!local->use_chanctx)
1696                 return;
1697
1698         mutex_lock(&local->chanctx_mtx);
1699         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1700                                          lockdep_is_held(&local->chanctx_mtx));
1701         if (conf) {
1702                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1703                 drv_assign_vif_chanctx(local, sdata, ctx);
1704         }
1705         mutex_unlock(&local->chanctx_mtx);
1706 }
1707
1708 int ieee80211_reconfig(struct ieee80211_local *local)
1709 {
1710         struct ieee80211_hw *hw = &local->hw;
1711         struct ieee80211_sub_if_data *sdata;
1712         struct ieee80211_chanctx *ctx;
1713         struct sta_info *sta;
1714         int res, i;
1715         bool reconfig_due_to_wowlan = false;
1716         struct ieee80211_sub_if_data *sched_scan_sdata;
1717         struct cfg80211_sched_scan_request *sched_scan_req;
1718         bool sched_scan_stopped = false;
1719         bool suspended = local->suspended;
1720
1721         /* nothing to do if HW shouldn't run */
1722         if (!local->open_count)
1723                 goto wake_up;
1724
1725 #ifdef CONFIG_PM
1726         if (suspended)
1727                 local->resuming = true;
1728
1729         if (local->wowlan) {
1730                 /*
1731                  * In the wowlan case, both mac80211 and the device
1732                  * are functional when the resume op is called, so
1733                  * clear local->suspended so the device could operate
1734                  * normally (e.g. pass rx frames).
1735                  */
1736                 local->suspended = false;
1737                 res = drv_resume(local);
1738                 local->wowlan = false;
1739                 if (res < 0) {
1740                         local->resuming = false;
1741                         return res;
1742                 }
1743                 if (res == 0)
1744                         goto wake_up;
1745                 WARN_ON(res > 1);
1746                 /*
1747                  * res is 1, which means the driver requested
1748                  * to go through a regular reset on wakeup.
1749                  * restore local->suspended in this case.
1750                  */
1751                 reconfig_due_to_wowlan = true;
1752                 local->suspended = true;
1753         }
1754 #endif
1755
1756         /*
1757          * Upon resume hardware can sometimes be goofy due to
1758          * various platform / driver / bus issues, so restarting
1759          * the device may at times not work immediately. Propagate
1760          * the error.
1761          */
1762         res = drv_start(local);
1763         if (res) {
1764                 if (suspended)
1765                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1766                 else
1767                         WARN(1, "Hardware became unavailable during restart.\n");
1768                 ieee80211_handle_reconfig_failure(local);
1769                 return res;
1770         }
1771
1772         /* setup fragmentation threshold */
1773         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1774
1775         /* setup RTS threshold */
1776         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1777
1778         /* reset coverage class */
1779         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1780
1781         ieee80211_led_radio(local, true);
1782         ieee80211_mod_tpt_led_trig(local,
1783                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1784
1785         /* add interfaces */
1786         sdata = rtnl_dereference(local->monitor_sdata);
1787         if (sdata) {
1788                 /* in HW restart it exists already */
1789                 WARN_ON(local->resuming);
1790                 res = drv_add_interface(local, sdata);
1791                 if (WARN_ON(res)) {
1792                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1793                         synchronize_net();
1794                         kfree(sdata);
1795                 }
1796         }
1797
1798         list_for_each_entry(sdata, &local->interfaces, list) {
1799                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1800                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1801                     ieee80211_sdata_running(sdata)) {
1802                         res = drv_add_interface(local, sdata);
1803                         if (WARN_ON(res))
1804                                 break;
1805                 }
1806         }
1807
1808         /* If adding any of the interfaces failed above, roll back and
1809          * report failure.
1810          */
1811         if (res) {
1812                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1813                                                      list)
1814                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1815                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1816                             ieee80211_sdata_running(sdata))
1817                                 drv_remove_interface(local, sdata);
1818                 ieee80211_handle_reconfig_failure(local);
1819                 return res;
1820         }
1821
1822         /* add channel contexts */
1823         if (local->use_chanctx) {
1824                 mutex_lock(&local->chanctx_mtx);
1825                 list_for_each_entry(ctx, &local->chanctx_list, list)
1826                         if (ctx->replace_state !=
1827                             IEEE80211_CHANCTX_REPLACES_OTHER)
1828                                 WARN_ON(drv_add_chanctx(local, ctx));
1829                 mutex_unlock(&local->chanctx_mtx);
1830
1831                 list_for_each_entry(sdata, &local->interfaces, list) {
1832                         if (!ieee80211_sdata_running(sdata))
1833                                 continue;
1834                         ieee80211_assign_chanctx(local, sdata);
1835                 }
1836
1837                 sdata = rtnl_dereference(local->monitor_sdata);
1838                 if (sdata && ieee80211_sdata_running(sdata))
1839                         ieee80211_assign_chanctx(local, sdata);
1840         }
1841
1842         /* add STAs back */
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                 /* AP-mode stations will be added later */
1851                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1852                         continue;
1853
1854                 for (state = IEEE80211_STA_NOTEXIST;
1855                      state < sta->sta_state; state++)
1856                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1857                                               state + 1));
1858         }
1859         mutex_unlock(&local->sta_mtx);
1860
1861         /* reconfigure tx conf */
1862         if (hw->queues >= IEEE80211_NUM_ACS) {
1863                 list_for_each_entry(sdata, &local->interfaces, list) {
1864                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1865                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1866                             !ieee80211_sdata_running(sdata))
1867                                 continue;
1868
1869                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1870                                 drv_conf_tx(local, sdata, i,
1871                                             &sdata->tx_conf[i]);
1872                 }
1873         }
1874
1875         /* reconfigure hardware */
1876         ieee80211_hw_config(local, ~0);
1877
1878         ieee80211_configure_filter(local);
1879
1880         /* Finally also reconfigure all the BSS information */
1881         list_for_each_entry(sdata, &local->interfaces, list) {
1882                 u32 changed;
1883
1884                 if (!ieee80211_sdata_running(sdata))
1885                         continue;
1886
1887                 /* common change flags for all interface types */
1888                 changed = BSS_CHANGED_ERP_CTS_PROT |
1889                           BSS_CHANGED_ERP_PREAMBLE |
1890                           BSS_CHANGED_ERP_SLOT |
1891                           BSS_CHANGED_HT |
1892                           BSS_CHANGED_BASIC_RATES |
1893                           BSS_CHANGED_BEACON_INT |
1894                           BSS_CHANGED_BSSID |
1895                           BSS_CHANGED_CQM |
1896                           BSS_CHANGED_QOS |
1897                           BSS_CHANGED_IDLE |
1898                           BSS_CHANGED_TXPOWER;
1899
1900                 switch (sdata->vif.type) {
1901                 case NL80211_IFTYPE_STATION:
1902                         changed |= BSS_CHANGED_ASSOC |
1903                                    BSS_CHANGED_ARP_FILTER |
1904                                    BSS_CHANGED_PS;
1905
1906                         /* Re-send beacon info report to the driver */
1907                         if (sdata->u.mgd.have_beacon)
1908                                 changed |= BSS_CHANGED_BEACON_INFO;
1909
1910                         sdata_lock(sdata);
1911                         ieee80211_bss_info_change_notify(sdata, changed);
1912                         sdata_unlock(sdata);
1913                         break;
1914                 case NL80211_IFTYPE_OCB:
1915                         changed |= BSS_CHANGED_OCB;
1916                         ieee80211_bss_info_change_notify(sdata, changed);
1917                         break;
1918                 case NL80211_IFTYPE_ADHOC:
1919                         changed |= BSS_CHANGED_IBSS;
1920                         /* fall through */
1921                 case NL80211_IFTYPE_AP:
1922                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1923
1924                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1925                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1926
1927                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1928                                         drv_start_ap(local, sdata);
1929                         }
1930
1931                         /* fall through */
1932                 case NL80211_IFTYPE_MESH_POINT:
1933                         if (sdata->vif.bss_conf.enable_beacon) {
1934                                 changed |= BSS_CHANGED_BEACON |
1935                                            BSS_CHANGED_BEACON_ENABLED;
1936                                 ieee80211_bss_info_change_notify(sdata, changed);
1937                         }
1938                         break;
1939                 case NL80211_IFTYPE_WDS:
1940                 case NL80211_IFTYPE_AP_VLAN:
1941                 case NL80211_IFTYPE_MONITOR:
1942                 case NL80211_IFTYPE_P2P_DEVICE:
1943                         /* nothing to do */
1944                         break;
1945                 case NL80211_IFTYPE_UNSPECIFIED:
1946                 case NUM_NL80211_IFTYPES:
1947                 case NL80211_IFTYPE_P2P_CLIENT:
1948                 case NL80211_IFTYPE_P2P_GO:
1949                         WARN_ON(1);
1950                         break;
1951                 }
1952         }
1953
1954         ieee80211_recalc_ps(local, -1);
1955
1956         /*
1957          * The sta might be in psm against the ap (e.g. because
1958          * this was the state before a hw restart), so we
1959          * explicitly send a null packet in order to make sure
1960          * it'll sync against the ap (and get out of psm).
1961          */
1962         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1963                 list_for_each_entry(sdata, &local->interfaces, list) {
1964                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1965                                 continue;
1966                         if (!sdata->u.mgd.associated)
1967                                 continue;
1968
1969                         ieee80211_send_nullfunc(local, sdata, false);
1970                 }
1971         }
1972
1973         /* APs are now beaconing, add back stations */
1974         mutex_lock(&local->sta_mtx);
1975         list_for_each_entry(sta, &local->sta_list, list) {
1976                 enum ieee80211_sta_state state;
1977
1978                 if (!sta->uploaded)
1979                         continue;
1980
1981                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1982                         continue;
1983
1984                 for (state = IEEE80211_STA_NOTEXIST;
1985                      state < sta->sta_state; state++)
1986                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1987                                               state + 1));
1988         }
1989         mutex_unlock(&local->sta_mtx);
1990
1991         /* add back keys */
1992         list_for_each_entry(sdata, &local->interfaces, list)
1993                 ieee80211_reset_crypto_tx_tailroom(sdata);
1994
1995         list_for_each_entry(sdata, &local->interfaces, list)
1996                 if (ieee80211_sdata_running(sdata))
1997                         ieee80211_enable_keys(sdata);
1998
1999  wake_up:
2000         local->in_reconfig = false;
2001         barrier();
2002
2003         if (local->monitors == local->open_count && local->monitors > 0)
2004                 ieee80211_add_virtual_monitor(local);
2005
2006         /*
2007          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2008          * sessions can be established after a resume.
2009          *
2010          * Also tear down aggregation sessions since reconfiguring
2011          * them in a hardware restart scenario is not easily done
2012          * right now, and the hardware will have lost information
2013          * about the sessions, but we and the AP still think they
2014          * are active. This is really a workaround though.
2015          */
2016         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2017                 mutex_lock(&local->sta_mtx);
2018
2019                 list_for_each_entry(sta, &local->sta_list, list) {
2020                         if (!local->resuming)
2021                                 ieee80211_sta_tear_down_BA_sessions(
2022                                                 sta, AGG_STOP_LOCAL_REQUEST);
2023                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2024                 }
2025
2026                 mutex_unlock(&local->sta_mtx);
2027         }
2028
2029         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2030                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2031                                         false);
2032
2033         /*
2034          * Reconfigure sched scan if it was interrupted by FW restart or
2035          * suspend.
2036          */
2037         mutex_lock(&local->mtx);
2038         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2039                                                 lockdep_is_held(&local->mtx));
2040         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2041                                                 lockdep_is_held(&local->mtx));
2042         if (sched_scan_sdata && sched_scan_req)
2043                 /*
2044                  * Sched scan stopped, but we don't want to report it. Instead,
2045                  * we're trying to reschedule.
2046                  */
2047                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2048                                                          sched_scan_req))
2049                         sched_scan_stopped = true;
2050         mutex_unlock(&local->mtx);
2051
2052         if (sched_scan_stopped)
2053                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2054
2055         /*
2056          * If this is for hw restart things are still running.
2057          * We may want to change that later, however.
2058          */
2059         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2060                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2061
2062         if (!suspended)
2063                 return 0;
2064
2065 #ifdef CONFIG_PM
2066         /* first set suspended false, then resuming */
2067         local->suspended = false;
2068         mb();
2069         local->resuming = false;
2070
2071         /* It's possible that we don't handle the scan completion in
2072          * time during suspend, so if it's still marked as completed
2073          * here, queue the work and flush it to clean things up.
2074          * Instead of calling the worker function directly here, we
2075          * really queue it to avoid potential races with other flows
2076          * scheduling the same work.
2077          */
2078         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2079                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2080                 flush_delayed_work(&local->scan_work);
2081         }
2082
2083         if (local->open_count && !reconfig_due_to_wowlan)
2084                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2085
2086         list_for_each_entry(sdata, &local->interfaces, list) {
2087                 if (!ieee80211_sdata_running(sdata))
2088                         continue;
2089                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2090                         ieee80211_sta_restart(sdata);
2091         }
2092
2093         mod_timer(&local->sta_cleanup, jiffies + 1);
2094 #else
2095         WARN_ON(1);
2096 #endif
2097
2098         return 0;
2099 }
2100
2101 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2102 {
2103         struct ieee80211_sub_if_data *sdata;
2104         struct ieee80211_local *local;
2105         struct ieee80211_key *key;
2106
2107         if (WARN_ON(!vif))
2108                 return;
2109
2110         sdata = vif_to_sdata(vif);
2111         local = sdata->local;
2112
2113         if (WARN_ON(!local->resuming))
2114                 return;
2115
2116         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2117                 return;
2118
2119         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2120
2121         mutex_lock(&local->key_mtx);
2122         list_for_each_entry(key, &sdata->key_list, list)
2123                 key->flags |= KEY_FLAG_TAINTED;
2124         mutex_unlock(&local->key_mtx);
2125 }
2126 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2127
2128 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2129 {
2130         struct ieee80211_local *local = sdata->local;
2131         struct ieee80211_chanctx_conf *chanctx_conf;
2132         struct ieee80211_chanctx *chanctx;
2133
2134         mutex_lock(&local->chanctx_mtx);
2135
2136         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2137                                         lockdep_is_held(&local->chanctx_mtx));
2138
2139         if (WARN_ON_ONCE(!chanctx_conf))
2140                 goto unlock;
2141
2142         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2143         ieee80211_recalc_smps_chanctx(local, chanctx);
2144  unlock:
2145         mutex_unlock(&local->chanctx_mtx);
2146 }
2147
2148 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2149 {
2150         struct ieee80211_local *local = sdata->local;
2151         struct ieee80211_chanctx_conf *chanctx_conf;
2152         struct ieee80211_chanctx *chanctx;
2153
2154         mutex_lock(&local->chanctx_mtx);
2155
2156         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2157                                         lockdep_is_held(&local->chanctx_mtx));
2158
2159         if (WARN_ON_ONCE(!chanctx_conf))
2160                 goto unlock;
2161
2162         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2163         ieee80211_recalc_chanctx_min_def(local, chanctx);
2164  unlock:
2165         mutex_unlock(&local->chanctx_mtx);
2166 }
2167
2168 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2169 {
2170         size_t pos = offset;
2171
2172         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2173                 pos += 2 + ies[pos + 1];
2174
2175         return pos;
2176 }
2177
2178 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2179                                             int rssi_min_thold,
2180                                             int rssi_max_thold)
2181 {
2182         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2183
2184         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2185                 return;
2186
2187         /*
2188          * Scale up threshold values before storing it, as the RSSI averaging
2189          * algorithm uses a scaled up value as well. Change this scaling
2190          * factor if the RSSI averaging algorithm changes.
2191          */
2192         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2193         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2194 }
2195
2196 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2197                                     int rssi_min_thold,
2198                                     int rssi_max_thold)
2199 {
2200         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2201
2202         WARN_ON(rssi_min_thold == rssi_max_thold ||
2203                 rssi_min_thold > rssi_max_thold);
2204
2205         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2206                                        rssi_max_thold);
2207 }
2208 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2209
2210 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2211 {
2212         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2213
2214         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2215 }
2216 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2217
2218 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2219                               u16 cap)
2220 {
2221         __le16 tmp;
2222
2223         *pos++ = WLAN_EID_HT_CAPABILITY;
2224         *pos++ = sizeof(struct ieee80211_ht_cap);
2225         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2226
2227         /* capability flags */
2228         tmp = cpu_to_le16(cap);
2229         memcpy(pos, &tmp, sizeof(u16));
2230         pos += sizeof(u16);
2231
2232         /* AMPDU parameters */
2233         *pos++ = ht_cap->ampdu_factor |
2234                  (ht_cap->ampdu_density <<
2235                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2236
2237         /* MCS set */
2238         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2239         pos += sizeof(ht_cap->mcs);
2240
2241         /* extended capabilities */
2242         pos += sizeof(__le16);
2243
2244         /* BF capabilities */
2245         pos += sizeof(__le32);
2246
2247         /* antenna selection */
2248         pos += sizeof(u8);
2249
2250         return pos;
2251 }
2252
2253 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2254                                u32 cap)
2255 {
2256         __le32 tmp;
2257
2258         *pos++ = WLAN_EID_VHT_CAPABILITY;
2259         *pos++ = sizeof(struct ieee80211_vht_cap);
2260         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2261
2262         /* capability flags */
2263         tmp = cpu_to_le32(cap);
2264         memcpy(pos, &tmp, sizeof(u32));
2265         pos += sizeof(u32);
2266
2267         /* VHT MCS set */
2268         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2269         pos += sizeof(vht_cap->vht_mcs);
2270
2271         return pos;
2272 }
2273
2274 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2275                                const struct cfg80211_chan_def *chandef,
2276                                u16 prot_mode)
2277 {
2278         struct ieee80211_ht_operation *ht_oper;
2279         /* Build HT Information */
2280         *pos++ = WLAN_EID_HT_OPERATION;
2281         *pos++ = sizeof(struct ieee80211_ht_operation);
2282         ht_oper = (struct ieee80211_ht_operation *)pos;
2283         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2284                                         chandef->chan->center_freq);
2285         switch (chandef->width) {
2286         case NL80211_CHAN_WIDTH_160:
2287         case NL80211_CHAN_WIDTH_80P80:
2288         case NL80211_CHAN_WIDTH_80:
2289         case NL80211_CHAN_WIDTH_40:
2290                 if (chandef->center_freq1 > chandef->chan->center_freq)
2291                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2292                 else
2293                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2294                 break;
2295         default:
2296                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2297                 break;
2298         }
2299         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2300             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2301             chandef->width != NL80211_CHAN_WIDTH_20)
2302                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2303
2304         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2305         ht_oper->stbc_param = 0x0000;
2306
2307         /* It seems that Basic MCS set and Supported MCS set
2308            are identical for the first 10 bytes */
2309         memset(&ht_oper->basic_set, 0, 16);
2310         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2311
2312         return pos + sizeof(struct ieee80211_ht_operation);
2313 }
2314
2315 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2316                                 const struct cfg80211_chan_def *chandef)
2317 {
2318         struct ieee80211_vht_operation *vht_oper;
2319
2320         *pos++ = WLAN_EID_VHT_OPERATION;
2321         *pos++ = sizeof(struct ieee80211_vht_operation);
2322         vht_oper = (struct ieee80211_vht_operation *)pos;
2323         vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2324                                                         chandef->center_freq1);
2325         if (chandef->center_freq2)
2326                 vht_oper->center_freq_seg2_idx =
2327                         ieee80211_frequency_to_channel(chandef->center_freq2);
2328         else
2329                 vht_oper->center_freq_seg2_idx = 0x00;
2330
2331         switch (chandef->width) {
2332         case NL80211_CHAN_WIDTH_160:
2333                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2334                 break;
2335         case NL80211_CHAN_WIDTH_80P80:
2336                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2337                 break;
2338         case NL80211_CHAN_WIDTH_80:
2339                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2340                 break;
2341         default:
2342                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2343                 break;
2344         }
2345
2346         /* don't require special VHT peer rates */
2347         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2348
2349         return pos + sizeof(struct ieee80211_vht_operation);
2350 }
2351
2352 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2353                                   const struct ieee80211_ht_operation *ht_oper,
2354                                   struct cfg80211_chan_def *chandef)
2355 {
2356         enum nl80211_channel_type channel_type;
2357
2358         if (!ht_oper) {
2359                 cfg80211_chandef_create(chandef, control_chan,
2360                                         NL80211_CHAN_NO_HT);
2361                 return;
2362         }
2363
2364         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2365         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2366                 channel_type = NL80211_CHAN_HT20;
2367                 break;
2368         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2369                 channel_type = NL80211_CHAN_HT40PLUS;
2370                 break;
2371         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2372                 channel_type = NL80211_CHAN_HT40MINUS;
2373                 break;
2374         default:
2375                 channel_type = NL80211_CHAN_NO_HT;
2376         }
2377
2378         cfg80211_chandef_create(chandef, control_chan, channel_type);
2379 }
2380
2381 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2382                                    const struct ieee80211_vht_operation *oper,
2383                                    struct cfg80211_chan_def *chandef)
2384 {
2385         if (!oper)
2386                 return;
2387
2388         chandef->chan = control_chan;
2389
2390         switch (oper->chan_width) {
2391         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2392                 break;
2393         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2394                 chandef->width = NL80211_CHAN_WIDTH_80;
2395                 break;
2396         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2397                 chandef->width = NL80211_CHAN_WIDTH_160;
2398                 break;
2399         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2400                 chandef->width = NL80211_CHAN_WIDTH_80P80;
2401                 break;
2402         default:
2403                 break;
2404         }
2405
2406         chandef->center_freq1 =
2407                 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2408                                                control_chan->band);
2409         chandef->center_freq2 =
2410                 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2411                                                control_chan->band);
2412 }
2413
2414 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2415                              const struct ieee80211_supported_band *sband,
2416                              const u8 *srates, int srates_len, u32 *rates)
2417 {
2418         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2419         int shift = ieee80211_chandef_get_shift(chandef);
2420         struct ieee80211_rate *br;
2421         int brate, rate, i, j, count = 0;
2422
2423         *rates = 0;
2424
2425         for (i = 0; i < srates_len; i++) {
2426                 rate = srates[i] & 0x7f;
2427
2428                 for (j = 0; j < sband->n_bitrates; j++) {
2429                         br = &sband->bitrates[j];
2430                         if ((rate_flags & br->flags) != rate_flags)
2431                                 continue;
2432
2433                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2434                         if (brate == rate) {
2435                                 *rates |= BIT(j);
2436                                 count++;
2437                                 break;
2438                         }
2439                 }
2440         }
2441         return count;
2442 }
2443
2444 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2445                             struct sk_buff *skb, bool need_basic,
2446                             enum ieee80211_band band)
2447 {
2448         struct ieee80211_local *local = sdata->local;
2449         struct ieee80211_supported_band *sband;
2450         int rate, shift;
2451         u8 i, rates, *pos;
2452         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2453         u32 rate_flags;
2454
2455         shift = ieee80211_vif_get_shift(&sdata->vif);
2456         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2457         sband = local->hw.wiphy->bands[band];
2458         rates = 0;
2459         for (i = 0; i < sband->n_bitrates; i++) {
2460                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2461                         continue;
2462                 rates++;
2463         }
2464         if (rates > 8)
2465                 rates = 8;
2466
2467         if (skb_tailroom(skb) < rates + 2)
2468                 return -ENOMEM;
2469
2470         pos = skb_put(skb, rates + 2);
2471         *pos++ = WLAN_EID_SUPP_RATES;
2472         *pos++ = rates;
2473         for (i = 0; i < rates; i++) {
2474                 u8 basic = 0;
2475                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2476                         continue;
2477
2478                 if (need_basic && basic_rates & BIT(i))
2479                         basic = 0x80;
2480                 rate = sband->bitrates[i].bitrate;
2481                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2482                                     5 * (1 << shift));
2483                 *pos++ = basic | (u8) rate;
2484         }
2485
2486         return 0;
2487 }
2488
2489 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2490                                 struct sk_buff *skb, bool need_basic,
2491                                 enum ieee80211_band band)
2492 {
2493         struct ieee80211_local *local = sdata->local;
2494         struct ieee80211_supported_band *sband;
2495         int rate, shift;
2496         u8 i, exrates, *pos;
2497         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2498         u32 rate_flags;
2499
2500         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2501         shift = ieee80211_vif_get_shift(&sdata->vif);
2502
2503         sband = local->hw.wiphy->bands[band];
2504         exrates = 0;
2505         for (i = 0; i < sband->n_bitrates; i++) {
2506                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2507                         continue;
2508                 exrates++;
2509         }
2510
2511         if (exrates > 8)
2512                 exrates -= 8;
2513         else
2514                 exrates = 0;
2515
2516         if (skb_tailroom(skb) < exrates + 2)
2517                 return -ENOMEM;
2518
2519         if (exrates) {
2520                 pos = skb_put(skb, exrates + 2);
2521                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2522                 *pos++ = exrates;
2523                 for (i = 8; i < sband->n_bitrates; i++) {
2524                         u8 basic = 0;
2525                         if ((rate_flags & sband->bitrates[i].flags)
2526                             != rate_flags)
2527                                 continue;
2528                         if (need_basic && basic_rates & BIT(i))
2529                                 basic = 0x80;
2530                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2531                                             5 * (1 << shift));
2532                         *pos++ = basic | (u8) rate;
2533                 }
2534         }
2535         return 0;
2536 }
2537
2538 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2539 {
2540         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2541         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2542
2543         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2544                 /* non-managed type inferfaces */
2545                 return 0;
2546         }
2547         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2548 }
2549 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2550
2551 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2552 {
2553         if (!mcs)
2554                 return 1;
2555
2556         /* TODO: consider rx_highest */
2557
2558         if (mcs->rx_mask[3])
2559                 return 4;
2560         if (mcs->rx_mask[2])
2561                 return 3;
2562         if (mcs->rx_mask[1])
2563                 return 2;
2564         return 1;
2565 }
2566
2567 /**
2568  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2569  * @local: mac80211 hw info struct
2570  * @status: RX status
2571  * @mpdu_len: total MPDU length (including FCS)
2572  * @mpdu_offset: offset into MPDU to calculate timestamp at
2573  *
2574  * This function calculates the RX timestamp at the given MPDU offset, taking
2575  * into account what the RX timestamp was. An offset of 0 will just normalize
2576  * the timestamp to TSF at beginning of MPDU reception.
2577  */
2578 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2579                                      struct ieee80211_rx_status *status,
2580                                      unsigned int mpdu_len,
2581                                      unsigned int mpdu_offset)
2582 {
2583         u64 ts = status->mactime;
2584         struct rate_info ri;
2585         u16 rate;
2586
2587         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2588                 return 0;
2589
2590         memset(&ri, 0, sizeof(ri));
2591
2592         /* Fill cfg80211 rate info */
2593         if (status->flag & RX_FLAG_HT) {
2594                 ri.mcs = status->rate_idx;
2595                 ri.flags |= RATE_INFO_FLAGS_MCS;
2596                 if (status->flag & RX_FLAG_40MHZ)
2597                         ri.bw = RATE_INFO_BW_40;
2598                 else
2599                         ri.bw = RATE_INFO_BW_20;
2600                 if (status->flag & RX_FLAG_SHORT_GI)
2601                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2602         } else if (status->flag & RX_FLAG_VHT) {
2603                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2604                 ri.mcs = status->rate_idx;
2605                 ri.nss = status->vht_nss;
2606                 if (status->flag & RX_FLAG_40MHZ)
2607                         ri.bw = RATE_INFO_BW_40;
2608                 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2609                         ri.bw = RATE_INFO_BW_80;
2610                 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2611                         ri.bw = RATE_INFO_BW_160;
2612                 else
2613                         ri.bw = RATE_INFO_BW_20;
2614                 if (status->flag & RX_FLAG_SHORT_GI)
2615                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2616         } else {
2617                 struct ieee80211_supported_band *sband;
2618                 int shift = 0;
2619                 int bitrate;
2620
2621                 if (status->flag & RX_FLAG_10MHZ) {
2622                         shift = 1;
2623                         ri.bw = RATE_INFO_BW_10;
2624                 } else if (status->flag & RX_FLAG_5MHZ) {
2625                         shift = 2;
2626                         ri.bw = RATE_INFO_BW_5;
2627                 } else {
2628                         ri.bw = RATE_INFO_BW_20;
2629                 }
2630
2631                 sband = local->hw.wiphy->bands[status->band];
2632                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2633                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2634         }
2635
2636         rate = cfg80211_calculate_bitrate(&ri);
2637         if (WARN_ONCE(!rate,
2638                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2639                       status->flag, status->rate_idx, status->vht_nss))
2640                 return 0;
2641
2642         /* rewind from end of MPDU */
2643         if (status->flag & RX_FLAG_MACTIME_END)
2644                 ts -= mpdu_len * 8 * 10 / rate;
2645
2646         ts += mpdu_offset * 8 * 10 / rate;
2647
2648         return ts;
2649 }
2650
2651 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2652 {
2653         struct ieee80211_sub_if_data *sdata;
2654         struct cfg80211_chan_def chandef;
2655
2656         mutex_lock(&local->mtx);
2657         mutex_lock(&local->iflist_mtx);
2658         list_for_each_entry(sdata, &local->interfaces, list) {
2659                 /* it might be waiting for the local->mtx, but then
2660                  * by the time it gets it, sdata->wdev.cac_started
2661                  * will no longer be true
2662                  */
2663                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2664
2665                 if (sdata->wdev.cac_started) {
2666                         chandef = sdata->vif.bss_conf.chandef;
2667                         ieee80211_vif_release_channel(sdata);
2668                         cfg80211_cac_event(sdata->dev,
2669                                            &chandef,
2670                                            NL80211_RADAR_CAC_ABORTED,
2671                                            GFP_KERNEL);
2672                 }
2673         }
2674         mutex_unlock(&local->iflist_mtx);
2675         mutex_unlock(&local->mtx);
2676 }
2677
2678 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2679 {
2680         struct ieee80211_local *local =
2681                 container_of(work, struct ieee80211_local, radar_detected_work);
2682         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2683         struct ieee80211_chanctx *ctx;
2684         int num_chanctx = 0;
2685
2686         mutex_lock(&local->chanctx_mtx);
2687         list_for_each_entry(ctx, &local->chanctx_list, list) {
2688                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2689                         continue;
2690
2691                 num_chanctx++;
2692                 chandef = ctx->conf.def;
2693         }
2694         mutex_unlock(&local->chanctx_mtx);
2695
2696         ieee80211_dfs_cac_cancel(local);
2697
2698         if (num_chanctx > 1)
2699                 /* XXX: multi-channel is not supported yet */
2700                 WARN_ON(1);
2701         else
2702                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2703 }
2704
2705 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2706 {
2707         struct ieee80211_local *local = hw_to_local(hw);
2708
2709         trace_api_radar_detected(local);
2710
2711         ieee80211_queue_work(hw, &local->radar_detected_work);
2712 }
2713 EXPORT_SYMBOL(ieee80211_radar_detected);
2714
2715 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2716 {
2717         u32 ret;
2718         int tmp;
2719
2720         switch (c->width) {
2721         case NL80211_CHAN_WIDTH_20:
2722                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2723                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2724                 break;
2725         case NL80211_CHAN_WIDTH_40:
2726                 c->width = NL80211_CHAN_WIDTH_20;
2727                 c->center_freq1 = c->chan->center_freq;
2728                 ret = IEEE80211_STA_DISABLE_40MHZ |
2729                       IEEE80211_STA_DISABLE_VHT;
2730                 break;
2731         case NL80211_CHAN_WIDTH_80:
2732                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2733                 /* n_P40 */
2734                 tmp /= 2;
2735                 /* freq_P40 */
2736                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2737                 c->width = NL80211_CHAN_WIDTH_40;
2738                 ret = IEEE80211_STA_DISABLE_VHT;
2739                 break;
2740         case NL80211_CHAN_WIDTH_80P80:
2741                 c->center_freq2 = 0;
2742                 c->width = NL80211_CHAN_WIDTH_80;
2743                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2744                       IEEE80211_STA_DISABLE_160MHZ;
2745                 break;
2746         case NL80211_CHAN_WIDTH_160:
2747                 /* n_P20 */
2748                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2749                 /* n_P80 */
2750                 tmp /= 4;
2751                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2752                 c->width = NL80211_CHAN_WIDTH_80;
2753                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2754                       IEEE80211_STA_DISABLE_160MHZ;
2755                 break;
2756         default:
2757         case NL80211_CHAN_WIDTH_20_NOHT:
2758                 WARN_ON_ONCE(1);
2759                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2760                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2761                 break;
2762         case NL80211_CHAN_WIDTH_5:
2763         case NL80211_CHAN_WIDTH_10:
2764                 WARN_ON_ONCE(1);
2765                 /* keep c->width */
2766                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2767                 break;
2768         }
2769
2770         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2771
2772         return ret;
2773 }
2774
2775 /*
2776  * Returns true if smps_mode_new is strictly more restrictive than
2777  * smps_mode_old.
2778  */
2779 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2780                                    enum ieee80211_smps_mode smps_mode_new)
2781 {
2782         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2783                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2784                 return false;
2785
2786         switch (smps_mode_old) {
2787         case IEEE80211_SMPS_STATIC:
2788                 return false;
2789         case IEEE80211_SMPS_DYNAMIC:
2790                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2791         case IEEE80211_SMPS_OFF:
2792                 return smps_mode_new != IEEE80211_SMPS_OFF;
2793         default:
2794                 WARN_ON(1);
2795         }
2796
2797         return false;
2798 }
2799
2800 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2801                               struct cfg80211_csa_settings *csa_settings)
2802 {
2803         struct sk_buff *skb;
2804         struct ieee80211_mgmt *mgmt;
2805         struct ieee80211_local *local = sdata->local;
2806         int freq;
2807         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2808                                sizeof(mgmt->u.action.u.chan_switch);
2809         u8 *pos;
2810
2811         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2812             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2813                 return -EOPNOTSUPP;
2814
2815         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2816                             5 + /* channel switch announcement element */
2817                             3 + /* secondary channel offset element */
2818                             8); /* mesh channel switch parameters element */
2819         if (!skb)
2820                 return -ENOMEM;
2821
2822         skb_reserve(skb, local->tx_headroom);
2823         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2824         memset(mgmt, 0, hdr_len);
2825         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2826                                           IEEE80211_STYPE_ACTION);
2827
2828         eth_broadcast_addr(mgmt->da);
2829         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2830         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2831                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2832         } else {
2833                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2834                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2835         }
2836         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2837         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2838         pos = skb_put(skb, 5);
2839         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2840         *pos++ = 3;                                             /* IE length */
2841         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2842         freq = csa_settings->chandef.chan->center_freq;
2843         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2844         *pos++ = csa_settings->count;                           /* count */
2845
2846         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2847                 enum nl80211_channel_type ch_type;
2848
2849                 skb_put(skb, 3);
2850                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2851                 *pos++ = 1;                                     /* IE length */
2852                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2853                 if (ch_type == NL80211_CHAN_HT40PLUS)
2854                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2855                 else
2856                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2857         }
2858
2859         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2860                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2861
2862                 skb_put(skb, 8);
2863                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2864                 *pos++ = 6;                                     /* IE length */
2865                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2866                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2867                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2868                 *pos++ |= csa_settings->block_tx ?
2869                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2870                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2871                 pos += 2;
2872                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2873                 pos += 2;
2874         }
2875
2876         ieee80211_tx_skb(sdata, skb);
2877         return 0;
2878 }
2879
2880 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2881 {
2882         return !(cs == NULL || cs->cipher == 0 ||
2883                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2884                  cs->hdr_len <= cs->key_idx_off ||
2885                  cs->key_idx_shift > 7 ||
2886                  cs->key_idx_mask == 0);
2887 }
2888
2889 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2890 {
2891         int i;
2892
2893         /* Ensure we have enough iftype bitmap space for all iftype values */
2894         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2895
2896         for (i = 0; i < n; i++)
2897                 if (!ieee80211_cs_valid(&cs[i]))
2898                         return false;
2899
2900         return true;
2901 }
2902
2903 const struct ieee80211_cipher_scheme *
2904 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2905                  enum nl80211_iftype iftype)
2906 {
2907         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2908         int n = local->hw.n_cipher_schemes;
2909         int i;
2910         const struct ieee80211_cipher_scheme *cs = NULL;
2911
2912         for (i = 0; i < n; i++) {
2913                 if (l[i].cipher == cipher) {
2914                         cs = &l[i];
2915                         break;
2916                 }
2917         }
2918
2919         if (!cs || !(cs->iftype & BIT(iftype)))
2920                 return NULL;
2921
2922         return cs;
2923 }
2924
2925 int ieee80211_cs_headroom(struct ieee80211_local *local,
2926                           struct cfg80211_crypto_settings *crypto,
2927                           enum nl80211_iftype iftype)
2928 {
2929         const struct ieee80211_cipher_scheme *cs;
2930         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2931         int i;
2932
2933         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2934                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2935                                       iftype);
2936
2937                 if (cs && headroom < cs->hdr_len)
2938                         headroom = cs->hdr_len;
2939         }
2940
2941         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2942         if (cs && headroom < cs->hdr_len)
2943                 headroom = cs->hdr_len;
2944
2945         return headroom;
2946 }
2947
2948 static bool
2949 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2950 {
2951         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2952         int skip;
2953
2954         if (end > 0)
2955                 return false;
2956
2957         /* End time is in the past, check for repetitions */
2958         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2959         if (data->count[i] < 255) {
2960                 if (data->count[i] <= skip) {
2961                         data->count[i] = 0;
2962                         return false;
2963                 }
2964
2965                 data->count[i] -= skip;
2966         }
2967
2968         data->desc[i].start += skip * data->desc[i].interval;
2969
2970         return true;
2971 }
2972
2973 static bool
2974 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2975                              s32 *offset)
2976 {
2977         bool ret = false;
2978         int i;
2979
2980         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2981                 s32 cur;
2982
2983                 if (!data->count[i])
2984                         continue;
2985
2986                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2987                         ret = true;
2988
2989                 cur = data->desc[i].start - tsf;
2990                 if (cur > *offset)
2991                         continue;
2992
2993                 cur = data->desc[i].start + data->desc[i].duration - tsf;
2994                 if (cur > *offset)
2995                         *offset = cur;
2996         }
2997
2998         return ret;
2999 }
3000
3001 static u32
3002 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3003 {
3004         s32 offset = 0;
3005         int tries = 0;
3006         /*
3007          * arbitrary limit, used to avoid infinite loops when combined NoA
3008          * descriptors cover the full time period.
3009          */
3010         int max_tries = 5;
3011
3012         ieee80211_extend_absent_time(data, tsf, &offset);
3013         do {
3014                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3015                         break;
3016
3017                 tries++;
3018         } while (tries < max_tries);
3019
3020         return offset;
3021 }
3022
3023 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3024 {
3025         u32 next_offset = BIT(31) - 1;
3026         int i;
3027
3028         data->absent = 0;
3029         data->has_next_tsf = false;
3030         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3031                 s32 start;
3032
3033                 if (!data->count[i])
3034                         continue;
3035
3036                 ieee80211_extend_noa_desc(data, tsf, i);
3037                 start = data->desc[i].start - tsf;
3038                 if (start <= 0)
3039                         data->absent |= BIT(i);
3040
3041                 if (next_offset > start)
3042                         next_offset = start;
3043
3044                 data->has_next_tsf = true;
3045         }
3046
3047         if (data->absent)
3048                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3049
3050         data->next_tsf = tsf + next_offset;
3051 }
3052 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3053
3054 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3055                             struct ieee80211_noa_data *data, u32 tsf)
3056 {
3057         int ret = 0;
3058         int i;
3059
3060         memset(data, 0, sizeof(*data));
3061
3062         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3063                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3064
3065                 if (!desc->count || !desc->duration)
3066                         continue;
3067
3068                 data->count[i] = desc->count;
3069                 data->desc[i].start = le32_to_cpu(desc->start_time);
3070                 data->desc[i].duration = le32_to_cpu(desc->duration);
3071                 data->desc[i].interval = le32_to_cpu(desc->interval);
3072
3073                 if (data->count[i] > 1 &&
3074                     data->desc[i].interval < data->desc[i].duration)
3075                         continue;
3076
3077                 ieee80211_extend_noa_desc(data, tsf, i);
3078                 ret++;
3079         }
3080
3081         if (ret)
3082                 ieee80211_update_p2p_noa(data, tsf);
3083
3084         return ret;
3085 }
3086 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3087
3088 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3089                            struct ieee80211_sub_if_data *sdata)
3090 {
3091         u64 tsf = drv_get_tsf(local, sdata);
3092         u64 dtim_count = 0;
3093         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3094         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3095         struct ps_data *ps;
3096         u8 bcns_from_dtim;
3097
3098         if (tsf == -1ULL || !beacon_int || !dtim_period)
3099                 return;
3100
3101         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3102             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3103                 if (!sdata->bss)
3104                         return;
3105
3106                 ps = &sdata->bss->ps;
3107         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3108                 ps = &sdata->u.mesh.ps;
3109         } else {
3110                 return;
3111         }
3112
3113         /*
3114          * actually finds last dtim_count, mac80211 will update in
3115          * __beacon_add_tim().
3116          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3117          */
3118         do_div(tsf, beacon_int);
3119         bcns_from_dtim = do_div(tsf, dtim_period);
3120         /* just had a DTIM */
3121         if (!bcns_from_dtim)
3122                 dtim_count = 0;
3123         else
3124                 dtim_count = dtim_period - bcns_from_dtim;
3125
3126         ps->dtim_count = dtim_count;
3127 }
3128
3129 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3130                                          struct ieee80211_chanctx *ctx)
3131 {
3132         struct ieee80211_sub_if_data *sdata;
3133         u8 radar_detect = 0;
3134
3135         lockdep_assert_held(&local->chanctx_mtx);
3136
3137         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3138                 return 0;
3139
3140         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3141                 if (sdata->reserved_radar_required)
3142                         radar_detect |= BIT(sdata->reserved_chandef.width);
3143
3144         /*
3145          * An in-place reservation context should not have any assigned vifs
3146          * until it replaces the other context.
3147          */
3148         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3149                 !list_empty(&ctx->assigned_vifs));
3150
3151         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3152                 if (sdata->radar_required)
3153                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3154
3155         return radar_detect;
3156 }
3157
3158 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3159                                  const struct cfg80211_chan_def *chandef,
3160                                  enum ieee80211_chanctx_mode chanmode,
3161                                  u8 radar_detect)
3162 {
3163         struct ieee80211_local *local = sdata->local;
3164         struct ieee80211_sub_if_data *sdata_iter;
3165         enum nl80211_iftype iftype = sdata->wdev.iftype;
3166         int num[NUM_NL80211_IFTYPES];
3167         struct ieee80211_chanctx *ctx;
3168         int num_different_channels = 0;
3169         int total = 1;
3170
3171         lockdep_assert_held(&local->chanctx_mtx);
3172
3173         if (WARN_ON(hweight32(radar_detect) > 1))
3174                 return -EINVAL;
3175
3176         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3177                     !chandef->chan))
3178                 return -EINVAL;
3179
3180         if (chandef)
3181                 num_different_channels = 1;
3182
3183         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3184                 return -EINVAL;
3185
3186         /* Always allow software iftypes */
3187         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3188                 if (radar_detect)
3189                         return -EINVAL;
3190                 return 0;
3191         }
3192
3193         memset(num, 0, sizeof(num));
3194
3195         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3196                 num[iftype] = 1;
3197
3198         list_for_each_entry(ctx, &local->chanctx_list, list) {
3199                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3200                         continue;
3201                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3202                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3203                         num_different_channels++;
3204                         continue;
3205                 }
3206                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3207                     cfg80211_chandef_compatible(chandef,
3208                                                 &ctx->conf.def))
3209                         continue;
3210                 num_different_channels++;
3211         }
3212
3213         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3214                 struct wireless_dev *wdev_iter;
3215
3216                 wdev_iter = &sdata_iter->wdev;
3217
3218                 if (sdata_iter == sdata ||
3219                     !ieee80211_sdata_running(sdata_iter) ||
3220                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3221                         continue;
3222
3223                 num[wdev_iter->iftype]++;
3224                 total++;
3225         }
3226
3227         if (total == 1 && !radar_detect)
3228                 return 0;
3229
3230         return cfg80211_check_combinations(local->hw.wiphy,
3231                                            num_different_channels,
3232                                            radar_detect, num);
3233 }
3234
3235 static void
3236 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3237                          void *data)
3238 {
3239         u32 *max_num_different_channels = data;
3240
3241         *max_num_different_channels = max(*max_num_different_channels,
3242                                           c->num_different_channels);
3243 }
3244
3245 int ieee80211_max_num_channels(struct ieee80211_local *local)
3246 {
3247         struct ieee80211_sub_if_data *sdata;
3248         int num[NUM_NL80211_IFTYPES] = {};
3249         struct ieee80211_chanctx *ctx;
3250         int num_different_channels = 0;
3251         u8 radar_detect = 0;
3252         u32 max_num_different_channels = 1;
3253         int err;
3254
3255         lockdep_assert_held(&local->chanctx_mtx);
3256
3257         list_for_each_entry(ctx, &local->chanctx_list, list) {
3258                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3259                         continue;
3260
3261                 num_different_channels++;
3262
3263                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3264         }
3265
3266         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3267                 num[sdata->wdev.iftype]++;
3268
3269         err = cfg80211_iter_combinations(local->hw.wiphy,
3270                                          num_different_channels, radar_detect,
3271                                          num, ieee80211_iter_max_chans,
3272                                          &max_num_different_channels);
3273         if (err < 0)
3274                 return err;
3275
3276         return max_num_different_channels;
3277 }
3278
3279 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3280 {
3281         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3282         *buf++ = 7; /* len */
3283         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3284         *buf++ = 0x50;
3285         *buf++ = 0xf2;
3286         *buf++ = 2; /* WME */
3287         *buf++ = 0; /* WME info */
3288         *buf++ = 1; /* WME ver */
3289         *buf++ = qosinfo; /* U-APSD no in use */
3290
3291         return buf;
3292 }
3293
3294 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3295                              struct sta_info *sta,
3296                              struct txq_info *txqi, int tid)
3297 {
3298         skb_queue_head_init(&txqi->queue);
3299         txqi->txq.vif = &sdata->vif;
3300
3301         if (sta) {
3302                 txqi->txq.sta = &sta->sta;
3303                 sta->sta.txq[tid] = &txqi->txq;
3304                 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3305         } else {
3306                 sdata->vif.txq = &txqi->txq;
3307                 txqi->txq.ac = IEEE80211_AC_BE;
3308         }
3309 }