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);
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. However, if more than one scan
2046                  * plan was set, we cannot reschedule since we don't know which
2047                  * scan plan was currently running (and some scan plans may have
2048                  * already finished).
2049                  */
2050                 if (sched_scan_req->n_scan_plans > 1 ||
2051                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2052                                                          sched_scan_req))
2053                         sched_scan_stopped = true;
2054         mutex_unlock(&local->mtx);
2055
2056         if (sched_scan_stopped)
2057                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2058
2059         /*
2060          * If this is for hw restart things are still running.
2061          * We may want to change that later, however.
2062          */
2063         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2064                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2065
2066         if (!suspended)
2067                 return 0;
2068
2069 #ifdef CONFIG_PM
2070         /* first set suspended false, then resuming */
2071         local->suspended = false;
2072         mb();
2073         local->resuming = false;
2074
2075         /* It's possible that we don't handle the scan completion in
2076          * time during suspend, so if it's still marked as completed
2077          * here, queue the work and flush it to clean things up.
2078          * Instead of calling the worker function directly here, we
2079          * really queue it to avoid potential races with other flows
2080          * scheduling the same work.
2081          */
2082         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2083                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2084                 flush_delayed_work(&local->scan_work);
2085         }
2086
2087         if (local->open_count && !reconfig_due_to_wowlan)
2088                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2089
2090         list_for_each_entry(sdata, &local->interfaces, list) {
2091                 if (!ieee80211_sdata_running(sdata))
2092                         continue;
2093                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2094                         ieee80211_sta_restart(sdata);
2095         }
2096
2097         mod_timer(&local->sta_cleanup, jiffies + 1);
2098 #else
2099         WARN_ON(1);
2100 #endif
2101
2102         return 0;
2103 }
2104
2105 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2106 {
2107         struct ieee80211_sub_if_data *sdata;
2108         struct ieee80211_local *local;
2109         struct ieee80211_key *key;
2110
2111         if (WARN_ON(!vif))
2112                 return;
2113
2114         sdata = vif_to_sdata(vif);
2115         local = sdata->local;
2116
2117         if (WARN_ON(!local->resuming))
2118                 return;
2119
2120         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2121                 return;
2122
2123         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2124
2125         mutex_lock(&local->key_mtx);
2126         list_for_each_entry(key, &sdata->key_list, list)
2127                 key->flags |= KEY_FLAG_TAINTED;
2128         mutex_unlock(&local->key_mtx);
2129 }
2130 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2131
2132 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2133 {
2134         struct ieee80211_local *local = sdata->local;
2135         struct ieee80211_chanctx_conf *chanctx_conf;
2136         struct ieee80211_chanctx *chanctx;
2137
2138         mutex_lock(&local->chanctx_mtx);
2139
2140         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2141                                         lockdep_is_held(&local->chanctx_mtx));
2142
2143         if (WARN_ON_ONCE(!chanctx_conf))
2144                 goto unlock;
2145
2146         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2147         ieee80211_recalc_smps_chanctx(local, chanctx);
2148  unlock:
2149         mutex_unlock(&local->chanctx_mtx);
2150 }
2151
2152 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2153 {
2154         struct ieee80211_local *local = sdata->local;
2155         struct ieee80211_chanctx_conf *chanctx_conf;
2156         struct ieee80211_chanctx *chanctx;
2157
2158         mutex_lock(&local->chanctx_mtx);
2159
2160         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2161                                         lockdep_is_held(&local->chanctx_mtx));
2162
2163         if (WARN_ON_ONCE(!chanctx_conf))
2164                 goto unlock;
2165
2166         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2167         ieee80211_recalc_chanctx_min_def(local, chanctx);
2168  unlock:
2169         mutex_unlock(&local->chanctx_mtx);
2170 }
2171
2172 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2173 {
2174         size_t pos = offset;
2175
2176         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2177                 pos += 2 + ies[pos + 1];
2178
2179         return pos;
2180 }
2181
2182 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2183                                             int rssi_min_thold,
2184                                             int rssi_max_thold)
2185 {
2186         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2187
2188         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2189                 return;
2190
2191         /*
2192          * Scale up threshold values before storing it, as the RSSI averaging
2193          * algorithm uses a scaled up value as well. Change this scaling
2194          * factor if the RSSI averaging algorithm changes.
2195          */
2196         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2197         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2198 }
2199
2200 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2201                                     int rssi_min_thold,
2202                                     int rssi_max_thold)
2203 {
2204         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2205
2206         WARN_ON(rssi_min_thold == rssi_max_thold ||
2207                 rssi_min_thold > rssi_max_thold);
2208
2209         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2210                                        rssi_max_thold);
2211 }
2212 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2213
2214 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2215 {
2216         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2217
2218         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2219 }
2220 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2221
2222 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2223                               u16 cap)
2224 {
2225         __le16 tmp;
2226
2227         *pos++ = WLAN_EID_HT_CAPABILITY;
2228         *pos++ = sizeof(struct ieee80211_ht_cap);
2229         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2230
2231         /* capability flags */
2232         tmp = cpu_to_le16(cap);
2233         memcpy(pos, &tmp, sizeof(u16));
2234         pos += sizeof(u16);
2235
2236         /* AMPDU parameters */
2237         *pos++ = ht_cap->ampdu_factor |
2238                  (ht_cap->ampdu_density <<
2239                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2240
2241         /* MCS set */
2242         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2243         pos += sizeof(ht_cap->mcs);
2244
2245         /* extended capabilities */
2246         pos += sizeof(__le16);
2247
2248         /* BF capabilities */
2249         pos += sizeof(__le32);
2250
2251         /* antenna selection */
2252         pos += sizeof(u8);
2253
2254         return pos;
2255 }
2256
2257 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2258                                u32 cap)
2259 {
2260         __le32 tmp;
2261
2262         *pos++ = WLAN_EID_VHT_CAPABILITY;
2263         *pos++ = sizeof(struct ieee80211_vht_cap);
2264         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2265
2266         /* capability flags */
2267         tmp = cpu_to_le32(cap);
2268         memcpy(pos, &tmp, sizeof(u32));
2269         pos += sizeof(u32);
2270
2271         /* VHT MCS set */
2272         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2273         pos += sizeof(vht_cap->vht_mcs);
2274
2275         return pos;
2276 }
2277
2278 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2279                                const struct cfg80211_chan_def *chandef,
2280                                u16 prot_mode)
2281 {
2282         struct ieee80211_ht_operation *ht_oper;
2283         /* Build HT Information */
2284         *pos++ = WLAN_EID_HT_OPERATION;
2285         *pos++ = sizeof(struct ieee80211_ht_operation);
2286         ht_oper = (struct ieee80211_ht_operation *)pos;
2287         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2288                                         chandef->chan->center_freq);
2289         switch (chandef->width) {
2290         case NL80211_CHAN_WIDTH_160:
2291         case NL80211_CHAN_WIDTH_80P80:
2292         case NL80211_CHAN_WIDTH_80:
2293         case NL80211_CHAN_WIDTH_40:
2294                 if (chandef->center_freq1 > chandef->chan->center_freq)
2295                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2296                 else
2297                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2298                 break;
2299         default:
2300                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2301                 break;
2302         }
2303         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2304             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2305             chandef->width != NL80211_CHAN_WIDTH_20)
2306                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2307
2308         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2309         ht_oper->stbc_param = 0x0000;
2310
2311         /* It seems that Basic MCS set and Supported MCS set
2312            are identical for the first 10 bytes */
2313         memset(&ht_oper->basic_set, 0, 16);
2314         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2315
2316         return pos + sizeof(struct ieee80211_ht_operation);
2317 }
2318
2319 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2320                                 const struct cfg80211_chan_def *chandef)
2321 {
2322         struct ieee80211_vht_operation *vht_oper;
2323
2324         *pos++ = WLAN_EID_VHT_OPERATION;
2325         *pos++ = sizeof(struct ieee80211_vht_operation);
2326         vht_oper = (struct ieee80211_vht_operation *)pos;
2327         vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2328                                                         chandef->center_freq1);
2329         if (chandef->center_freq2)
2330                 vht_oper->center_freq_seg2_idx =
2331                         ieee80211_frequency_to_channel(chandef->center_freq2);
2332         else
2333                 vht_oper->center_freq_seg2_idx = 0x00;
2334
2335         switch (chandef->width) {
2336         case NL80211_CHAN_WIDTH_160:
2337                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2338                 break;
2339         case NL80211_CHAN_WIDTH_80P80:
2340                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2341                 break;
2342         case NL80211_CHAN_WIDTH_80:
2343                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2344                 break;
2345         default:
2346                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2347                 break;
2348         }
2349
2350         /* don't require special VHT peer rates */
2351         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2352
2353         return pos + sizeof(struct ieee80211_vht_operation);
2354 }
2355
2356 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2357                                   const struct ieee80211_ht_operation *ht_oper,
2358                                   struct cfg80211_chan_def *chandef)
2359 {
2360         enum nl80211_channel_type channel_type;
2361
2362         if (!ht_oper) {
2363                 cfg80211_chandef_create(chandef, control_chan,
2364                                         NL80211_CHAN_NO_HT);
2365                 return;
2366         }
2367
2368         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2369         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2370                 channel_type = NL80211_CHAN_HT20;
2371                 break;
2372         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2373                 channel_type = NL80211_CHAN_HT40PLUS;
2374                 break;
2375         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2376                 channel_type = NL80211_CHAN_HT40MINUS;
2377                 break;
2378         default:
2379                 channel_type = NL80211_CHAN_NO_HT;
2380         }
2381
2382         cfg80211_chandef_create(chandef, control_chan, channel_type);
2383 }
2384
2385 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2386                                    const struct ieee80211_vht_operation *oper,
2387                                    struct cfg80211_chan_def *chandef)
2388 {
2389         if (!oper)
2390                 return;
2391
2392         chandef->chan = control_chan;
2393
2394         switch (oper->chan_width) {
2395         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2396                 break;
2397         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2398                 chandef->width = NL80211_CHAN_WIDTH_80;
2399                 break;
2400         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2401                 chandef->width = NL80211_CHAN_WIDTH_160;
2402                 break;
2403         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2404                 chandef->width = NL80211_CHAN_WIDTH_80P80;
2405                 break;
2406         default:
2407                 break;
2408         }
2409
2410         chandef->center_freq1 =
2411                 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2412                                                control_chan->band);
2413         chandef->center_freq2 =
2414                 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2415                                                control_chan->band);
2416 }
2417
2418 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2419                              const struct ieee80211_supported_band *sband,
2420                              const u8 *srates, int srates_len, u32 *rates)
2421 {
2422         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2423         int shift = ieee80211_chandef_get_shift(chandef);
2424         struct ieee80211_rate *br;
2425         int brate, rate, i, j, count = 0;
2426
2427         *rates = 0;
2428
2429         for (i = 0; i < srates_len; i++) {
2430                 rate = srates[i] & 0x7f;
2431
2432                 for (j = 0; j < sband->n_bitrates; j++) {
2433                         br = &sband->bitrates[j];
2434                         if ((rate_flags & br->flags) != rate_flags)
2435                                 continue;
2436
2437                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2438                         if (brate == rate) {
2439                                 *rates |= BIT(j);
2440                                 count++;
2441                                 break;
2442                         }
2443                 }
2444         }
2445         return count;
2446 }
2447
2448 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2449                             struct sk_buff *skb, bool need_basic,
2450                             enum ieee80211_band band)
2451 {
2452         struct ieee80211_local *local = sdata->local;
2453         struct ieee80211_supported_band *sband;
2454         int rate, shift;
2455         u8 i, rates, *pos;
2456         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2457         u32 rate_flags;
2458
2459         shift = ieee80211_vif_get_shift(&sdata->vif);
2460         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2461         sband = local->hw.wiphy->bands[band];
2462         rates = 0;
2463         for (i = 0; i < sband->n_bitrates; i++) {
2464                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2465                         continue;
2466                 rates++;
2467         }
2468         if (rates > 8)
2469                 rates = 8;
2470
2471         if (skb_tailroom(skb) < rates + 2)
2472                 return -ENOMEM;
2473
2474         pos = skb_put(skb, rates + 2);
2475         *pos++ = WLAN_EID_SUPP_RATES;
2476         *pos++ = rates;
2477         for (i = 0; i < rates; i++) {
2478                 u8 basic = 0;
2479                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2480                         continue;
2481
2482                 if (need_basic && basic_rates & BIT(i))
2483                         basic = 0x80;
2484                 rate = sband->bitrates[i].bitrate;
2485                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2486                                     5 * (1 << shift));
2487                 *pos++ = basic | (u8) rate;
2488         }
2489
2490         return 0;
2491 }
2492
2493 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2494                                 struct sk_buff *skb, bool need_basic,
2495                                 enum ieee80211_band band)
2496 {
2497         struct ieee80211_local *local = sdata->local;
2498         struct ieee80211_supported_band *sband;
2499         int rate, shift;
2500         u8 i, exrates, *pos;
2501         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2502         u32 rate_flags;
2503
2504         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2505         shift = ieee80211_vif_get_shift(&sdata->vif);
2506
2507         sband = local->hw.wiphy->bands[band];
2508         exrates = 0;
2509         for (i = 0; i < sband->n_bitrates; i++) {
2510                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2511                         continue;
2512                 exrates++;
2513         }
2514
2515         if (exrates > 8)
2516                 exrates -= 8;
2517         else
2518                 exrates = 0;
2519
2520         if (skb_tailroom(skb) < exrates + 2)
2521                 return -ENOMEM;
2522
2523         if (exrates) {
2524                 pos = skb_put(skb, exrates + 2);
2525                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2526                 *pos++ = exrates;
2527                 for (i = 8; i < sband->n_bitrates; i++) {
2528                         u8 basic = 0;
2529                         if ((rate_flags & sband->bitrates[i].flags)
2530                             != rate_flags)
2531                                 continue;
2532                         if (need_basic && basic_rates & BIT(i))
2533                                 basic = 0x80;
2534                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2535                                             5 * (1 << shift));
2536                         *pos++ = basic | (u8) rate;
2537                 }
2538         }
2539         return 0;
2540 }
2541
2542 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2543 {
2544         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2545         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2546
2547         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2548                 /* non-managed type inferfaces */
2549                 return 0;
2550         }
2551         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2552 }
2553 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2554
2555 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2556 {
2557         if (!mcs)
2558                 return 1;
2559
2560         /* TODO: consider rx_highest */
2561
2562         if (mcs->rx_mask[3])
2563                 return 4;
2564         if (mcs->rx_mask[2])
2565                 return 3;
2566         if (mcs->rx_mask[1])
2567                 return 2;
2568         return 1;
2569 }
2570
2571 /**
2572  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2573  * @local: mac80211 hw info struct
2574  * @status: RX status
2575  * @mpdu_len: total MPDU length (including FCS)
2576  * @mpdu_offset: offset into MPDU to calculate timestamp at
2577  *
2578  * This function calculates the RX timestamp at the given MPDU offset, taking
2579  * into account what the RX timestamp was. An offset of 0 will just normalize
2580  * the timestamp to TSF at beginning of MPDU reception.
2581  */
2582 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2583                                      struct ieee80211_rx_status *status,
2584                                      unsigned int mpdu_len,
2585                                      unsigned int mpdu_offset)
2586 {
2587         u64 ts = status->mactime;
2588         struct rate_info ri;
2589         u16 rate;
2590
2591         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2592                 return 0;
2593
2594         memset(&ri, 0, sizeof(ri));
2595
2596         /* Fill cfg80211 rate info */
2597         if (status->flag & RX_FLAG_HT) {
2598                 ri.mcs = status->rate_idx;
2599                 ri.flags |= RATE_INFO_FLAGS_MCS;
2600                 if (status->flag & RX_FLAG_40MHZ)
2601                         ri.bw = RATE_INFO_BW_40;
2602                 else
2603                         ri.bw = RATE_INFO_BW_20;
2604                 if (status->flag & RX_FLAG_SHORT_GI)
2605                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2606         } else if (status->flag & RX_FLAG_VHT) {
2607                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2608                 ri.mcs = status->rate_idx;
2609                 ri.nss = status->vht_nss;
2610                 if (status->flag & RX_FLAG_40MHZ)
2611                         ri.bw = RATE_INFO_BW_40;
2612                 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2613                         ri.bw = RATE_INFO_BW_80;
2614                 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2615                         ri.bw = RATE_INFO_BW_160;
2616                 else
2617                         ri.bw = RATE_INFO_BW_20;
2618                 if (status->flag & RX_FLAG_SHORT_GI)
2619                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2620         } else {
2621                 struct ieee80211_supported_band *sband;
2622                 int shift = 0;
2623                 int bitrate;
2624
2625                 if (status->flag & RX_FLAG_10MHZ) {
2626                         shift = 1;
2627                         ri.bw = RATE_INFO_BW_10;
2628                 } else if (status->flag & RX_FLAG_5MHZ) {
2629                         shift = 2;
2630                         ri.bw = RATE_INFO_BW_5;
2631                 } else {
2632                         ri.bw = RATE_INFO_BW_20;
2633                 }
2634
2635                 sband = local->hw.wiphy->bands[status->band];
2636                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2637                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2638         }
2639
2640         rate = cfg80211_calculate_bitrate(&ri);
2641         if (WARN_ONCE(!rate,
2642                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2643                       status->flag, status->rate_idx, status->vht_nss))
2644                 return 0;
2645
2646         /* rewind from end of MPDU */
2647         if (status->flag & RX_FLAG_MACTIME_END)
2648                 ts -= mpdu_len * 8 * 10 / rate;
2649
2650         ts += mpdu_offset * 8 * 10 / rate;
2651
2652         return ts;
2653 }
2654
2655 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2656 {
2657         struct ieee80211_sub_if_data *sdata;
2658         struct cfg80211_chan_def chandef;
2659
2660         mutex_lock(&local->mtx);
2661         mutex_lock(&local->iflist_mtx);
2662         list_for_each_entry(sdata, &local->interfaces, list) {
2663                 /* it might be waiting for the local->mtx, but then
2664                  * by the time it gets it, sdata->wdev.cac_started
2665                  * will no longer be true
2666                  */
2667                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2668
2669                 if (sdata->wdev.cac_started) {
2670                         chandef = sdata->vif.bss_conf.chandef;
2671                         ieee80211_vif_release_channel(sdata);
2672                         cfg80211_cac_event(sdata->dev,
2673                                            &chandef,
2674                                            NL80211_RADAR_CAC_ABORTED,
2675                                            GFP_KERNEL);
2676                 }
2677         }
2678         mutex_unlock(&local->iflist_mtx);
2679         mutex_unlock(&local->mtx);
2680 }
2681
2682 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2683 {
2684         struct ieee80211_local *local =
2685                 container_of(work, struct ieee80211_local, radar_detected_work);
2686         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2687         struct ieee80211_chanctx *ctx;
2688         int num_chanctx = 0;
2689
2690         mutex_lock(&local->chanctx_mtx);
2691         list_for_each_entry(ctx, &local->chanctx_list, list) {
2692                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2693                         continue;
2694
2695                 num_chanctx++;
2696                 chandef = ctx->conf.def;
2697         }
2698         mutex_unlock(&local->chanctx_mtx);
2699
2700         ieee80211_dfs_cac_cancel(local);
2701
2702         if (num_chanctx > 1)
2703                 /* XXX: multi-channel is not supported yet */
2704                 WARN_ON(1);
2705         else
2706                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2707 }
2708
2709 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2710 {
2711         struct ieee80211_local *local = hw_to_local(hw);
2712
2713         trace_api_radar_detected(local);
2714
2715         ieee80211_queue_work(hw, &local->radar_detected_work);
2716 }
2717 EXPORT_SYMBOL(ieee80211_radar_detected);
2718
2719 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2720 {
2721         u32 ret;
2722         int tmp;
2723
2724         switch (c->width) {
2725         case NL80211_CHAN_WIDTH_20:
2726                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2727                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2728                 break;
2729         case NL80211_CHAN_WIDTH_40:
2730                 c->width = NL80211_CHAN_WIDTH_20;
2731                 c->center_freq1 = c->chan->center_freq;
2732                 ret = IEEE80211_STA_DISABLE_40MHZ |
2733                       IEEE80211_STA_DISABLE_VHT;
2734                 break;
2735         case NL80211_CHAN_WIDTH_80:
2736                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2737                 /* n_P40 */
2738                 tmp /= 2;
2739                 /* freq_P40 */
2740                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2741                 c->width = NL80211_CHAN_WIDTH_40;
2742                 ret = IEEE80211_STA_DISABLE_VHT;
2743                 break;
2744         case NL80211_CHAN_WIDTH_80P80:
2745                 c->center_freq2 = 0;
2746                 c->width = NL80211_CHAN_WIDTH_80;
2747                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2748                       IEEE80211_STA_DISABLE_160MHZ;
2749                 break;
2750         case NL80211_CHAN_WIDTH_160:
2751                 /* n_P20 */
2752                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2753                 /* n_P80 */
2754                 tmp /= 4;
2755                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2756                 c->width = NL80211_CHAN_WIDTH_80;
2757                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2758                       IEEE80211_STA_DISABLE_160MHZ;
2759                 break;
2760         default:
2761         case NL80211_CHAN_WIDTH_20_NOHT:
2762                 WARN_ON_ONCE(1);
2763                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2764                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2765                 break;
2766         case NL80211_CHAN_WIDTH_5:
2767         case NL80211_CHAN_WIDTH_10:
2768                 WARN_ON_ONCE(1);
2769                 /* keep c->width */
2770                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2771                 break;
2772         }
2773
2774         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2775
2776         return ret;
2777 }
2778
2779 /*
2780  * Returns true if smps_mode_new is strictly more restrictive than
2781  * smps_mode_old.
2782  */
2783 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2784                                    enum ieee80211_smps_mode smps_mode_new)
2785 {
2786         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2787                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2788                 return false;
2789
2790         switch (smps_mode_old) {
2791         case IEEE80211_SMPS_STATIC:
2792                 return false;
2793         case IEEE80211_SMPS_DYNAMIC:
2794                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2795         case IEEE80211_SMPS_OFF:
2796                 return smps_mode_new != IEEE80211_SMPS_OFF;
2797         default:
2798                 WARN_ON(1);
2799         }
2800
2801         return false;
2802 }
2803
2804 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2805                               struct cfg80211_csa_settings *csa_settings)
2806 {
2807         struct sk_buff *skb;
2808         struct ieee80211_mgmt *mgmt;
2809         struct ieee80211_local *local = sdata->local;
2810         int freq;
2811         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2812                                sizeof(mgmt->u.action.u.chan_switch);
2813         u8 *pos;
2814
2815         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2816             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2817                 return -EOPNOTSUPP;
2818
2819         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2820                             5 + /* channel switch announcement element */
2821                             3 + /* secondary channel offset element */
2822                             8); /* mesh channel switch parameters element */
2823         if (!skb)
2824                 return -ENOMEM;
2825
2826         skb_reserve(skb, local->tx_headroom);
2827         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2828         memset(mgmt, 0, hdr_len);
2829         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2830                                           IEEE80211_STYPE_ACTION);
2831
2832         eth_broadcast_addr(mgmt->da);
2833         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2834         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2835                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2836         } else {
2837                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2838                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2839         }
2840         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2841         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2842         pos = skb_put(skb, 5);
2843         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2844         *pos++ = 3;                                             /* IE length */
2845         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2846         freq = csa_settings->chandef.chan->center_freq;
2847         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2848         *pos++ = csa_settings->count;                           /* count */
2849
2850         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2851                 enum nl80211_channel_type ch_type;
2852
2853                 skb_put(skb, 3);
2854                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2855                 *pos++ = 1;                                     /* IE length */
2856                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2857                 if (ch_type == NL80211_CHAN_HT40PLUS)
2858                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2859                 else
2860                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2861         }
2862
2863         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2864                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2865
2866                 skb_put(skb, 8);
2867                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2868                 *pos++ = 6;                                     /* IE length */
2869                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2870                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2871                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2872                 *pos++ |= csa_settings->block_tx ?
2873                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2874                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2875                 pos += 2;
2876                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2877                 pos += 2;
2878         }
2879
2880         ieee80211_tx_skb(sdata, skb);
2881         return 0;
2882 }
2883
2884 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2885 {
2886         return !(cs == NULL || cs->cipher == 0 ||
2887                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2888                  cs->hdr_len <= cs->key_idx_off ||
2889                  cs->key_idx_shift > 7 ||
2890                  cs->key_idx_mask == 0);
2891 }
2892
2893 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2894 {
2895         int i;
2896
2897         /* Ensure we have enough iftype bitmap space for all iftype values */
2898         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2899
2900         for (i = 0; i < n; i++)
2901                 if (!ieee80211_cs_valid(&cs[i]))
2902                         return false;
2903
2904         return true;
2905 }
2906
2907 const struct ieee80211_cipher_scheme *
2908 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2909                  enum nl80211_iftype iftype)
2910 {
2911         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2912         int n = local->hw.n_cipher_schemes;
2913         int i;
2914         const struct ieee80211_cipher_scheme *cs = NULL;
2915
2916         for (i = 0; i < n; i++) {
2917                 if (l[i].cipher == cipher) {
2918                         cs = &l[i];
2919                         break;
2920                 }
2921         }
2922
2923         if (!cs || !(cs->iftype & BIT(iftype)))
2924                 return NULL;
2925
2926         return cs;
2927 }
2928
2929 int ieee80211_cs_headroom(struct ieee80211_local *local,
2930                           struct cfg80211_crypto_settings *crypto,
2931                           enum nl80211_iftype iftype)
2932 {
2933         const struct ieee80211_cipher_scheme *cs;
2934         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2935         int i;
2936
2937         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2938                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2939                                       iftype);
2940
2941                 if (cs && headroom < cs->hdr_len)
2942                         headroom = cs->hdr_len;
2943         }
2944
2945         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2946         if (cs && headroom < cs->hdr_len)
2947                 headroom = cs->hdr_len;
2948
2949         return headroom;
2950 }
2951
2952 static bool
2953 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2954 {
2955         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2956         int skip;
2957
2958         if (end > 0)
2959                 return false;
2960
2961         /* One shot NOA  */
2962         if (data->count[i] == 1)
2963                 return false;
2964
2965         if (data->desc[i].interval == 0)
2966                 return false;
2967
2968         /* End time is in the past, check for repetitions */
2969         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2970         if (data->count[i] < 255) {
2971                 if (data->count[i] <= skip) {
2972                         data->count[i] = 0;
2973                         return false;
2974                 }
2975
2976                 data->count[i] -= skip;
2977         }
2978
2979         data->desc[i].start += skip * data->desc[i].interval;
2980
2981         return true;
2982 }
2983
2984 static bool
2985 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2986                              s32 *offset)
2987 {
2988         bool ret = false;
2989         int i;
2990
2991         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2992                 s32 cur;
2993
2994                 if (!data->count[i])
2995                         continue;
2996
2997                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2998                         ret = true;
2999
3000                 cur = data->desc[i].start - tsf;
3001                 if (cur > *offset)
3002                         continue;
3003
3004                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3005                 if (cur > *offset)
3006                         *offset = cur;
3007         }
3008
3009         return ret;
3010 }
3011
3012 static u32
3013 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3014 {
3015         s32 offset = 0;
3016         int tries = 0;
3017         /*
3018          * arbitrary limit, used to avoid infinite loops when combined NoA
3019          * descriptors cover the full time period.
3020          */
3021         int max_tries = 5;
3022
3023         ieee80211_extend_absent_time(data, tsf, &offset);
3024         do {
3025                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3026                         break;
3027
3028                 tries++;
3029         } while (tries < max_tries);
3030
3031         return offset;
3032 }
3033
3034 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3035 {
3036         u32 next_offset = BIT(31) - 1;
3037         int i;
3038
3039         data->absent = 0;
3040         data->has_next_tsf = false;
3041         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3042                 s32 start;
3043
3044                 if (!data->count[i])
3045                         continue;
3046
3047                 ieee80211_extend_noa_desc(data, tsf, i);
3048                 start = data->desc[i].start - tsf;
3049                 if (start <= 0)
3050                         data->absent |= BIT(i);
3051
3052                 if (next_offset > start)
3053                         next_offset = start;
3054
3055                 data->has_next_tsf = true;
3056         }
3057
3058         if (data->absent)
3059                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3060
3061         data->next_tsf = tsf + next_offset;
3062 }
3063 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3064
3065 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3066                             struct ieee80211_noa_data *data, u32 tsf)
3067 {
3068         int ret = 0;
3069         int i;
3070
3071         memset(data, 0, sizeof(*data));
3072
3073         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3074                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3075
3076                 if (!desc->count || !desc->duration)
3077                         continue;
3078
3079                 data->count[i] = desc->count;
3080                 data->desc[i].start = le32_to_cpu(desc->start_time);
3081                 data->desc[i].duration = le32_to_cpu(desc->duration);
3082                 data->desc[i].interval = le32_to_cpu(desc->interval);
3083
3084                 if (data->count[i] > 1 &&
3085                     data->desc[i].interval < data->desc[i].duration)
3086                         continue;
3087
3088                 ieee80211_extend_noa_desc(data, tsf, i);
3089                 ret++;
3090         }
3091
3092         if (ret)
3093                 ieee80211_update_p2p_noa(data, tsf);
3094
3095         return ret;
3096 }
3097 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3098
3099 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3100                            struct ieee80211_sub_if_data *sdata)
3101 {
3102         u64 tsf = drv_get_tsf(local, sdata);
3103         u64 dtim_count = 0;
3104         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3105         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3106         struct ps_data *ps;
3107         u8 bcns_from_dtim;
3108
3109         if (tsf == -1ULL || !beacon_int || !dtim_period)
3110                 return;
3111
3112         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3113             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3114                 if (!sdata->bss)
3115                         return;
3116
3117                 ps = &sdata->bss->ps;
3118         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3119                 ps = &sdata->u.mesh.ps;
3120         } else {
3121                 return;
3122         }
3123
3124         /*
3125          * actually finds last dtim_count, mac80211 will update in
3126          * __beacon_add_tim().
3127          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3128          */
3129         do_div(tsf, beacon_int);
3130         bcns_from_dtim = do_div(tsf, dtim_period);
3131         /* just had a DTIM */
3132         if (!bcns_from_dtim)
3133                 dtim_count = 0;
3134         else
3135                 dtim_count = dtim_period - bcns_from_dtim;
3136
3137         ps->dtim_count = dtim_count;
3138 }
3139
3140 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3141                                          struct ieee80211_chanctx *ctx)
3142 {
3143         struct ieee80211_sub_if_data *sdata;
3144         u8 radar_detect = 0;
3145
3146         lockdep_assert_held(&local->chanctx_mtx);
3147
3148         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3149                 return 0;
3150
3151         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3152                 if (sdata->reserved_radar_required)
3153                         radar_detect |= BIT(sdata->reserved_chandef.width);
3154
3155         /*
3156          * An in-place reservation context should not have any assigned vifs
3157          * until it replaces the other context.
3158          */
3159         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3160                 !list_empty(&ctx->assigned_vifs));
3161
3162         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3163                 if (sdata->radar_required)
3164                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3165
3166         return radar_detect;
3167 }
3168
3169 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3170                                  const struct cfg80211_chan_def *chandef,
3171                                  enum ieee80211_chanctx_mode chanmode,
3172                                  u8 radar_detect)
3173 {
3174         struct ieee80211_local *local = sdata->local;
3175         struct ieee80211_sub_if_data *sdata_iter;
3176         enum nl80211_iftype iftype = sdata->wdev.iftype;
3177         int num[NUM_NL80211_IFTYPES];
3178         struct ieee80211_chanctx *ctx;
3179         int num_different_channels = 0;
3180         int total = 1;
3181
3182         lockdep_assert_held(&local->chanctx_mtx);
3183
3184         if (WARN_ON(hweight32(radar_detect) > 1))
3185                 return -EINVAL;
3186
3187         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3188                     !chandef->chan))
3189                 return -EINVAL;
3190
3191         if (chandef)
3192                 num_different_channels = 1;
3193
3194         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3195                 return -EINVAL;
3196
3197         /* Always allow software iftypes */
3198         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3199                 if (radar_detect)
3200                         return -EINVAL;
3201                 return 0;
3202         }
3203
3204         memset(num, 0, sizeof(num));
3205
3206         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3207                 num[iftype] = 1;
3208
3209         list_for_each_entry(ctx, &local->chanctx_list, list) {
3210                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3211                         continue;
3212                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3213                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3214                         num_different_channels++;
3215                         continue;
3216                 }
3217                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3218                     cfg80211_chandef_compatible(chandef,
3219                                                 &ctx->conf.def))
3220                         continue;
3221                 num_different_channels++;
3222         }
3223
3224         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3225                 struct wireless_dev *wdev_iter;
3226
3227                 wdev_iter = &sdata_iter->wdev;
3228
3229                 if (sdata_iter == sdata ||
3230                     !ieee80211_sdata_running(sdata_iter) ||
3231                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3232                         continue;
3233
3234                 num[wdev_iter->iftype]++;
3235                 total++;
3236         }
3237
3238         if (total == 1 && !radar_detect)
3239                 return 0;
3240
3241         return cfg80211_check_combinations(local->hw.wiphy,
3242                                            num_different_channels,
3243                                            radar_detect, num);
3244 }
3245
3246 static void
3247 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3248                          void *data)
3249 {
3250         u32 *max_num_different_channels = data;
3251
3252         *max_num_different_channels = max(*max_num_different_channels,
3253                                           c->num_different_channels);
3254 }
3255
3256 int ieee80211_max_num_channels(struct ieee80211_local *local)
3257 {
3258         struct ieee80211_sub_if_data *sdata;
3259         int num[NUM_NL80211_IFTYPES] = {};
3260         struct ieee80211_chanctx *ctx;
3261         int num_different_channels = 0;
3262         u8 radar_detect = 0;
3263         u32 max_num_different_channels = 1;
3264         int err;
3265
3266         lockdep_assert_held(&local->chanctx_mtx);
3267
3268         list_for_each_entry(ctx, &local->chanctx_list, list) {
3269                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3270                         continue;
3271
3272                 num_different_channels++;
3273
3274                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3275         }
3276
3277         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3278                 num[sdata->wdev.iftype]++;
3279
3280         err = cfg80211_iter_combinations(local->hw.wiphy,
3281                                          num_different_channels, radar_detect,
3282                                          num, ieee80211_iter_max_chans,
3283                                          &max_num_different_channels);
3284         if (err < 0)
3285                 return err;
3286
3287         return max_num_different_channels;
3288 }
3289
3290 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3291 {
3292         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3293         *buf++ = 7; /* len */
3294         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3295         *buf++ = 0x50;
3296         *buf++ = 0xf2;
3297         *buf++ = 2; /* WME */
3298         *buf++ = 0; /* WME info */
3299         *buf++ = 1; /* WME ver */
3300         *buf++ = qosinfo; /* U-APSD no in use */
3301
3302         return buf;
3303 }
3304
3305 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3306                              struct sta_info *sta,
3307                              struct txq_info *txqi, int tid)
3308 {
3309         skb_queue_head_init(&txqi->queue);
3310         txqi->txq.vif = &sdata->vif;
3311
3312         if (sta) {
3313                 txqi->txq.sta = &sta->sta;
3314                 sta->sta.txq[tid] = &txqi->txq;
3315                 txqi->txq.tid = tid;
3316                 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3317         } else {
3318                 sdata->vif.txq = &txqi->txq;
3319                 txqi->txq.tid = 0;
3320                 txqi->txq.ac = IEEE80211_AC_BE;
3321         }
3322 }