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  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   8  * Copyright (C) 2018 Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * utilities for mac80211
  15  */
  16
  17 #include <net/mac80211.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/export.h>
  20 #include <linux/types.h>
  21 #include <linux/slab.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/if_arp.h>
  25 #include <linux/bitmap.h>
  26 #include <linux/crc32.h>
  27 #include <net/net_namespace.h>
  28 #include <net/cfg80211.h>
  29 #include <net/rtnetlink.h>
  30
  31 #include "ieee80211_i.h"
  32 #include "driver-ops.h"
  33 #include "rate.h"
  34 #include "mesh.h"
  35 #include "wme.h"
  36 #include "led.h"
  37 #include "wep.h"
  38
  39 /* privid for wiphys to determine whether they belong to us or not */
  40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  41
  42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  43 {
  44         struct ieee80211_local *local;
  45         BUG_ON(!wiphy);
  46
  47         local = wiphy_priv(wiphy);
  48         return &local->hw;
  49 }
  50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  51
  52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  53 {
  54         struct sk_buff *skb;
  55         struct ieee80211_hdr *hdr;
  56
  57         skb_queue_walk(&tx->skbs, skb) {
  58                 hdr = (struct ieee80211_hdr *) skb->data;
  59                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  60         }
  61 }
  62
  63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  64                              int rate, int erp, int short_preamble,
  65                              int shift)
  66 {
  67         int dur;
  68
  69         /* calculate duration (in microseconds, rounded up to next higher
  70          * integer if it includes a fractional microsecond) to send frame of
  71          * len bytes (does not include FCS) at the given rate. Duration will
  72          * also include SIFS.
  73          *
  74          * rate is in 100 kbps, so divident is multiplied by 10 in the
  75          * DIV_ROUND_UP() operations.
  76          *
  77          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  78          * is assumed to be 0 otherwise.
  79          */
  80
  81         if (band == NL80211_BAND_5GHZ || erp) {
  82                 /*
  83                  * OFDM:
  84                  *
  85                  * N_DBPS = DATARATE x 4
  86                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  87                  *      (16 = SIGNAL time, 6 = tail bits)
  88                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  89                  *
  90                  * T_SYM = 4 usec
  91                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  92                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  93                  *      signal ext = 6 usec
  94                  */
  95                 dur = 16; /* SIFS + signal ext */
  96                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  97                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  98
  99                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 100                  *  * times 4 for 5 MHz
 101                  *  * times 2 for 10 MHz
 102                  */
 103                 dur *= 1 << shift;
 104
 105                 /* rates should already consider the channel bandwidth,
 106                  * don't apply divisor again.
 107                  */
 108                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 109                                         4 * rate); /* T_SYM x N_SYM */
 110         } else {
 111                 /*
 112                  * 802.11b or 802.11g with 802.11b compatibility:
 113                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 114                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 115                  *
 116                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 117                  * aSIFSTime = 10 usec
 118                  * aPreambleLength = 144 usec or 72 usec with short preamble
 119                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 120                  */
 121                 dur = 10; /* aSIFSTime = 10 usec */
 122                 dur += short_preamble ? (72 + 24) : (144 + 48);
 123
 124                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 125         }
 126
 127         return dur;
 128 }
 129
 130 /* Exported duration function for driver use */
 131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 132                                         struct ieee80211_vif *vif,
 133                                         enum nl80211_band band,
 134                                         size_t frame_len,
 135                                         struct ieee80211_rate *rate)
 136 {
 137         struct ieee80211_sub_if_data *sdata;
 138         u16 dur;
 139         int erp, shift = 0;
 140         bool short_preamble = false;
 141
 142         erp = 0;
 143         if (vif) {
 144                 sdata = vif_to_sdata(vif);
 145                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 146                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 147                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 148                 shift = ieee80211_vif_get_shift(vif);
 149         }
 150
 151         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 152                                        short_preamble, shift);
 153
 154         return cpu_to_le16(dur);
 155 }
 156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 157
 158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 159                               struct ieee80211_vif *vif, size_t frame_len,
 160                               const struct ieee80211_tx_info *frame_txctl)
 161 {
 162         struct ieee80211_local *local = hw_to_local(hw);
 163         struct ieee80211_rate *rate;
 164         struct ieee80211_sub_if_data *sdata;
 165         bool short_preamble;
 166         int erp, shift = 0, bitrate;
 167         u16 dur;
 168         struct ieee80211_supported_band *sband;
 169
 170         sband = local->hw.wiphy->bands[frame_txctl->band];
 171
 172         short_preamble = false;
 173
 174         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 175
 176         erp = 0;
 177         if (vif) {
 178                 sdata = vif_to_sdata(vif);
 179                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 180                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 181                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 182                 shift = ieee80211_vif_get_shift(vif);
 183         }
 184
 185         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 186
 187         /* CTS duration */
 188         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 189                                        erp, short_preamble, shift);
 190         /* Data frame duration */
 191         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 192                                         erp, short_preamble, shift);
 193         /* ACK duration */
 194         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 195                                         erp, short_preamble, shift);
 196
 197         return cpu_to_le16(dur);
 198 }
 199 EXPORT_SYMBOL(ieee80211_rts_duration);
 200
 201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 202                                     struct ieee80211_vif *vif,
 203                                     size_t frame_len,
 204                                     const struct ieee80211_tx_info *frame_txctl)
 205 {
 206         struct ieee80211_local *local = hw_to_local(hw);
 207         struct ieee80211_rate *rate;
 208         struct ieee80211_sub_if_data *sdata;
 209         bool short_preamble;
 210         int erp, shift = 0, bitrate;
 211         u16 dur;
 212         struct ieee80211_supported_band *sband;
 213
 214         sband = local->hw.wiphy->bands[frame_txctl->band];
 215
 216         short_preamble = false;
 217
 218         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 219         erp = 0;
 220         if (vif) {
 221                 sdata = vif_to_sdata(vif);
 222                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 223                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 224                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 225                 shift = ieee80211_vif_get_shift(vif);
 226         }
 227
 228         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 229
 230         /* Data frame duration */
 231         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 232                                        erp, short_preamble, shift);
 233         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 234                 /* ACK duration */
 235                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 236                                                 erp, short_preamble, shift);
 237         }
 238
 239         return cpu_to_le16(dur);
 240 }
 241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 242
 243 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 244 {
 245         struct ieee80211_sub_if_data *sdata;
 246         int n_acs = IEEE80211_NUM_ACS;
 247
 248         if (local->ops->wake_tx_queue)
 249                 return;
 250
 251         if (local->hw.queues < IEEE80211_NUM_ACS)
 252                 n_acs = 1;
 253
 254         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 255                 int ac;
 256
 257                 if (!sdata->dev)
 258                         continue;
 259
 260                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 261                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 262                         continue;
 263
 264                 for (ac = 0; ac < n_acs; ac++) {
 265                         int ac_queue = sdata->vif.hw_queue[ac];
 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                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 295                         local->q_stop_reasons[queue][reason] = 0;
 296         }
 297
 298         if (local->q_stop_reasons[queue][reason] == 0)
 299                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 300
 301         if (local->queue_stop_reasons[queue] != 0)
 302                 /* someone still has this queue stopped */
 303                 return;
 304
 305         if (skb_queue_empty(&local->pending[queue])) {
 306                 rcu_read_lock();
 307                 ieee80211_propagate_queue_wake(local, queue);
 308                 rcu_read_unlock();
 309         } else
 310                 tasklet_schedule(&local->tx_pending_tasklet);
 311 }
 312
 313 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 314                                     enum queue_stop_reason reason,
 315                                     bool refcounted)
 316 {
 317         struct ieee80211_local *local = hw_to_local(hw);
 318         unsigned long flags;
 319
 320         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 321         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 322         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 323 }
 324
 325 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 326 {
 327         ieee80211_wake_queue_by_reason(hw, queue,
 328                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 329                                        false);
 330 }
 331 EXPORT_SYMBOL(ieee80211_wake_queue);
 332
 333 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 334                                    enum queue_stop_reason reason,
 335                                    bool refcounted)
 336 {
 337         struct ieee80211_local *local = hw_to_local(hw);
 338         struct ieee80211_sub_if_data *sdata;
 339         int n_acs = IEEE80211_NUM_ACS;
 340
 341         trace_stop_queue(local, queue, reason);
 342
 343         if (WARN_ON(queue >= hw->queues))
 344                 return;
 345
 346         if (!refcounted)
 347                 local->q_stop_reasons[queue][reason] = 1;
 348         else
 349                 local->q_stop_reasons[queue][reason]++;
 350
 351         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 352                 return;
 353
 354         if (local->ops->wake_tx_queue)
 355                 return;
 356
 357         if (local->hw.queues < IEEE80211_NUM_ACS)
 358                 n_acs = 1;
 359
 360         rcu_read_lock();
 361         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 362                 int ac;
 363
 364                 if (!sdata->dev)
 365                         continue;
 366
 367                 for (ac = 0; ac < n_acs; ac++) {
 368                         if (sdata->vif.hw_queue[ac] == queue ||
 369                             sdata->vif.cab_queue == queue)
 370                                 netif_stop_subqueue(sdata->dev, ac);
 371                 }
 372         }
 373         rcu_read_unlock();
 374 }
 375
 376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 377                                     enum queue_stop_reason reason,
 378                                     bool refcounted)
 379 {
 380         struct ieee80211_local *local = hw_to_local(hw);
 381         unsigned long flags;
 382
 383         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 384         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 385         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 386 }
 387
 388 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 389 {
 390         ieee80211_stop_queue_by_reason(hw, queue,
 391                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 392                                        false);
 393 }
 394 EXPORT_SYMBOL(ieee80211_stop_queue);
 395
 396 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 397                                struct sk_buff *skb)
 398 {
 399         struct ieee80211_hw *hw = &local->hw;
 400         unsigned long flags;
 401         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 402         int queue = info->hw_queue;
 403
 404         if (WARN_ON(!info->control.vif)) {
 405                 ieee80211_free_txskb(&local->hw, skb);
 406                 return;
 407         }
 408
 409         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 410         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 411                                false);
 412         __skb_queue_tail(&local->pending[queue], skb);
 413         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 414                                false);
 415         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 416 }
 417
 418 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 419                                 struct sk_buff_head *skbs)
 420 {
 421         struct ieee80211_hw *hw = &local->hw;
 422         struct sk_buff *skb;
 423         unsigned long flags;
 424         int queue, i;
 425
 426         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 427         while ((skb = skb_dequeue(skbs))) {
 428                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 429
 430                 if (WARN_ON(!info->control.vif)) {
 431                         ieee80211_free_txskb(&local->hw, skb);
 432                         continue;
 433                 }
 434
 435                 queue = info->hw_queue;
 436
 437                 __ieee80211_stop_queue(hw, queue,
 438                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 439                                 false);
 440
 441                 __skb_queue_tail(&local->pending[queue], skb);
 442         }
 443
 444         for (i = 0; i < hw->queues; i++)
 445                 __ieee80211_wake_queue(hw, i,
 446                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 447                         false);
 448         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 449 }
 450
 451 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 452                                      unsigned long queues,
 453                                      enum queue_stop_reason reason,
 454                                      bool refcounted)
 455 {
 456         struct ieee80211_local *local = hw_to_local(hw);
 457         unsigned long flags;
 458         int i;
 459
 460         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 461
 462         for_each_set_bit(i, &queues, hw->queues)
 463                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 464
 465         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 466 }
 467
 468 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 469 {
 470         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 471                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 472                                         false);
 473 }
 474 EXPORT_SYMBOL(ieee80211_stop_queues);
 475
 476 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 477 {
 478         struct ieee80211_local *local = hw_to_local(hw);
 479         unsigned long flags;
 480         int ret;
 481
 482         if (WARN_ON(queue >= hw->queues))
 483                 return true;
 484
 485         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 486         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 487                        &local->queue_stop_reasons[queue]);
 488         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 489         return ret;
 490 }
 491 EXPORT_SYMBOL(ieee80211_queue_stopped);
 492
 493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 494                                      unsigned long queues,
 495                                      enum queue_stop_reason reason,
 496                                      bool refcounted)
 497 {
 498         struct ieee80211_local *local = hw_to_local(hw);
 499         unsigned long flags;
 500         int i;
 501
 502         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 503
 504         for_each_set_bit(i, &queues, hw->queues)
 505                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 506
 507         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 508 }
 509
 510 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 511 {
 512         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 513                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 514                                         false);
 515 }
 516 EXPORT_SYMBOL(ieee80211_wake_queues);
 517
 518 static unsigned int
 519 ieee80211_get_vif_queues(struct ieee80211_local *local,
 520                          struct ieee80211_sub_if_data *sdata)
 521 {
 522         unsigned int queues;
 523
 524         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 525                 int ac;
 526
 527                 queues = 0;
 528
 529                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 530                         queues |= BIT(sdata->vif.hw_queue[ac]);
 531                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 532                         queues |= BIT(sdata->vif.cab_queue);
 533         } else {
 534                 /* all queues */
 535                 queues = BIT(local->hw.queues) - 1;
 536         }
 537
 538         return queues;
 539 }
 540
 541 void __ieee80211_flush_queues(struct ieee80211_local *local,
 542                               struct ieee80211_sub_if_data *sdata,
 543                               unsigned int queues, bool drop)
 544 {
 545         if (!local->ops->flush)
 546                 return;
 547
 548         /*
 549          * If no queue was set, or if the HW doesn't support
 550          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 551          */
 552         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 553                 queues = ieee80211_get_vif_queues(local, sdata);
 554
 555         ieee80211_stop_queues_by_reason(&local->hw, queues,
 556                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 557                                         false);
 558
 559         drv_flush(local, sdata, queues, drop);
 560
 561         ieee80211_wake_queues_by_reason(&local->hw, queues,
 562                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 563                                         false);
 564 }
 565
 566 void ieee80211_flush_queues(struct ieee80211_local *local,
 567                             struct ieee80211_sub_if_data *sdata, bool drop)
 568 {
 569         __ieee80211_flush_queues(local, sdata, 0, drop);
 570 }
 571
 572 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 573                                struct ieee80211_sub_if_data *sdata,
 574                                enum queue_stop_reason reason)
 575 {
 576         ieee80211_stop_queues_by_reason(&local->hw,
 577                                         ieee80211_get_vif_queues(local, sdata),
 578                                         reason, true);
 579 }
 580
 581 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 582                                struct ieee80211_sub_if_data *sdata,
 583                                enum queue_stop_reason reason)
 584 {
 585         ieee80211_wake_queues_by_reason(&local->hw,
 586                                         ieee80211_get_vif_queues(local, sdata),
 587                                         reason, true);
 588 }
 589
 590 static void __iterate_interfaces(struct ieee80211_local *local,
 591                                  u32 iter_flags,
 592                                  void (*iterator)(void *data, u8 *mac,
 593                                                   struct ieee80211_vif *vif),
 594                                  void *data)
 595 {
 596         struct ieee80211_sub_if_data *sdata;
 597         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 598
 599         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 600                 switch (sdata->vif.type) {
 601                 case NL80211_IFTYPE_MONITOR:
 602                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 603                                 continue;
 604                         break;
 605                 case NL80211_IFTYPE_AP_VLAN:
 606                         continue;
 607                 default:
 608                         break;
 609                 }
 610                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 611                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 612                         continue;
 613                 if (ieee80211_sdata_running(sdata) || !active_only)
 614                         iterator(data, sdata->vif.addr,
 615                                  &sdata->vif);
 616         }
 617
 618         sdata = rcu_dereference_check(local->monitor_sdata,
 619                                       lockdep_is_held(&local->iflist_mtx) ||
 620                                       lockdep_rtnl_is_held());
 621         if (sdata &&
 622             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 623              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 624                 iterator(data, sdata->vif.addr, &sdata->vif);
 625 }
 626
 627 void ieee80211_iterate_interfaces(
 628         struct ieee80211_hw *hw, u32 iter_flags,
 629         void (*iterator)(void *data, u8 *mac,
 630                          struct ieee80211_vif *vif),
 631         void *data)
 632 {
 633         struct ieee80211_local *local = hw_to_local(hw);
 634
 635         mutex_lock(&local->iflist_mtx);
 636         __iterate_interfaces(local, iter_flags, iterator, data);
 637         mutex_unlock(&local->iflist_mtx);
 638 }
 639 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 640
 641 void ieee80211_iterate_active_interfaces_atomic(
 642         struct ieee80211_hw *hw, u32 iter_flags,
 643         void (*iterator)(void *data, u8 *mac,
 644                          struct ieee80211_vif *vif),
 645         void *data)
 646 {
 647         struct ieee80211_local *local = hw_to_local(hw);
 648
 649         rcu_read_lock();
 650         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 651                              iterator, data);
 652         rcu_read_unlock();
 653 }
 654 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 655
 656 void ieee80211_iterate_active_interfaces_rtnl(
 657         struct ieee80211_hw *hw, u32 iter_flags,
 658         void (*iterator)(void *data, u8 *mac,
 659                          struct ieee80211_vif *vif),
 660         void *data)
 661 {
 662         struct ieee80211_local *local = hw_to_local(hw);
 663
 664         ASSERT_RTNL();
 665
 666         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 667                              iterator, data);
 668 }
 669 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 670
 671 static void __iterate_stations(struct ieee80211_local *local,
 672                                void (*iterator)(void *data,
 673                                                 struct ieee80211_sta *sta),
 674                                void *data)
 675 {
 676         struct sta_info *sta;
 677
 678         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 679                 if (!sta->uploaded)
 680                         continue;
 681
 682                 iterator(data, &sta->sta);
 683         }
 684 }
 685
 686 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 687                         void (*iterator)(void *data,
 688                                          struct ieee80211_sta *sta),
 689                         void *data)
 690 {
 691         struct ieee80211_local *local = hw_to_local(hw);
 692
 693         rcu_read_lock();
 694         __iterate_stations(local, iterator, data);
 695         rcu_read_unlock();
 696 }
 697 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 698
 699 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 700 {
 701         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 702
 703         if (!ieee80211_sdata_running(sdata) ||
 704             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 705                 return NULL;
 706         return &sdata->vif;
 707 }
 708 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 709
 710 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 711 {
 712         struct ieee80211_sub_if_data *sdata;
 713
 714         if (!vif)
 715                 return NULL;
 716
 717         sdata = vif_to_sdata(vif);
 718
 719         if (!ieee80211_sdata_running(sdata) ||
 720             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 721                 return NULL;
 722
 723         return &sdata->wdev;
 724 }
 725 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 726
 727 /*
 728  * Nothing should have been stuffed into the workqueue during
 729  * the suspend->resume cycle. Since we can't check each caller
 730  * of this function if we are already quiescing / suspended,
 731  * check here and don't WARN since this can actually happen when
 732  * the rx path (for example) is racing against __ieee80211_suspend
 733  * and suspending / quiescing was set after the rx path checked
 734  * them.
 735  */
 736 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 737 {
 738         if (local->quiescing || (local->suspended && !local->resuming)) {
 739                 pr_warn("queueing ieee80211 work while going to suspend\n");
 740                 return false;
 741         }
 742
 743         return true;
 744 }
 745
 746 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 747 {
 748         struct ieee80211_local *local = hw_to_local(hw);
 749
 750         if (!ieee80211_can_queue_work(local))
 751                 return;
 752
 753         queue_work(local->workqueue, work);
 754 }
 755 EXPORT_SYMBOL(ieee80211_queue_work);
 756
 757 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 758                                   struct delayed_work *dwork,
 759                                   unsigned long delay)
 760 {
 761         struct ieee80211_local *local = hw_to_local(hw);
 762
 763         if (!ieee80211_can_queue_work(local))
 764                 return;
 765
 766         queue_delayed_work(local->workqueue, dwork, delay);
 767 }
 768 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 769
 770 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 771                                struct ieee802_11_elems *elems,
 772                                u64 filter, u32 crc)
 773 {
 774         size_t left = len;
 775         const u8 *pos = start;
 776         bool calc_crc = filter != 0;
 777         DECLARE_BITMAP(seen_elems, 256);
 778         const u8 *ie;
 779
 780         bitmap_zero(seen_elems, 256);
 781         memset(elems, 0, sizeof(*elems));
 782         elems->ie_start = start;
 783         elems->total_len = len;
 784
 785         while (left >= 2) {
 786                 u8 id, elen;
 787                 bool elem_parse_failed;
 788
 789                 id = *pos++;
 790                 elen = *pos++;
 791                 left -= 2;
 792
 793                 if (elen > left) {
 794                         elems->parse_error = true;
 795                         break;
 796                 }
 797
 798                 switch (id) {
 799                 case WLAN_EID_SSID:
 800                 case WLAN_EID_SUPP_RATES:
 801                 case WLAN_EID_FH_PARAMS:
 802                 case WLAN_EID_DS_PARAMS:
 803                 case WLAN_EID_CF_PARAMS:
 804                 case WLAN_EID_TIM:
 805                 case WLAN_EID_IBSS_PARAMS:
 806                 case WLAN_EID_CHALLENGE:
 807                 case WLAN_EID_RSN:
 808                 case WLAN_EID_ERP_INFO:
 809                 case WLAN_EID_EXT_SUPP_RATES:
 810                 case WLAN_EID_HT_CAPABILITY:
 811                 case WLAN_EID_HT_OPERATION:
 812                 case WLAN_EID_VHT_CAPABILITY:
 813                 case WLAN_EID_VHT_OPERATION:
 814                 case WLAN_EID_MESH_ID:
 815                 case WLAN_EID_MESH_CONFIG:
 816                 case WLAN_EID_PEER_MGMT:
 817                 case WLAN_EID_PREQ:
 818                 case WLAN_EID_PREP:
 819                 case WLAN_EID_PERR:
 820                 case WLAN_EID_RANN:
 821                 case WLAN_EID_CHANNEL_SWITCH:
 822                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 823                 case WLAN_EID_COUNTRY:
 824                 case WLAN_EID_PWR_CONSTRAINT:
 825                 case WLAN_EID_TIMEOUT_INTERVAL:
 826                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 827                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 828                 case WLAN_EID_CHAN_SWITCH_PARAM:
 829                 case WLAN_EID_EXT_CAPABILITY:
 830                 case WLAN_EID_CHAN_SWITCH_TIMING:
 831                 case WLAN_EID_LINK_ID:
 832                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 833                 /*
 834                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 835                  * that if the content gets bigger it might be needed more than once
 836                  */
 837                         if (test_bit(id, seen_elems)) {
 838                                 elems->parse_error = true;
 839                                 left -= elen;
 840                                 pos += elen;
 841                                 continue;
 842                         }
 843                         break;
 844                 }
 845
 846                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 847                         crc = crc32_be(crc, pos - 2, elen + 2);
 848
 849                 elem_parse_failed = false;
 850
 851                 switch (id) {
 852                 case WLAN_EID_LINK_ID:
 853                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 854                                 elem_parse_failed = true;
 855                                 break;
 856                         }
 857                         elems->lnk_id = (void *)(pos - 2);
 858                         break;
 859                 case WLAN_EID_CHAN_SWITCH_TIMING:
 860                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 861                                 elem_parse_failed = true;
 862                                 break;
 863                         }
 864                         elems->ch_sw_timing = (void *)pos;
 865                         break;
 866                 case WLAN_EID_EXT_CAPABILITY:
 867                         elems->ext_capab = pos;
 868                         elems->ext_capab_len = elen;
 869                         break;
 870                 case WLAN_EID_SSID:
 871                         elems->ssid = pos;
 872                         elems->ssid_len = elen;
 873                         break;
 874                 case WLAN_EID_SUPP_RATES:
 875                         elems->supp_rates = pos;
 876                         elems->supp_rates_len = elen;
 877                         break;
 878                 case WLAN_EID_DS_PARAMS:
 879                         if (elen >= 1)
 880                                 elems->ds_params = pos;
 881                         else
 882                                 elem_parse_failed = true;
 883                         break;
 884                 case WLAN_EID_TIM:
 885                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 886                                 elems->tim = (void *)pos;
 887                                 elems->tim_len = elen;
 888                         } else
 889                                 elem_parse_failed = true;
 890                         break;
 891                 case WLAN_EID_CHALLENGE:
 892                         elems->challenge = pos;
 893                         elems->challenge_len = elen;
 894                         break;
 895                 case WLAN_EID_VENDOR_SPECIFIC:
 896                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 897                             pos[2] == 0xf2) {
 898                                 /* Microsoft OUI (00:50:F2) */
 899
 900                                 if (calc_crc)
 901                                         crc = crc32_be(crc, pos - 2, elen + 2);
 902
 903                                 if (elen >= 5 && pos[3] == 2) {
 904                                         /* OUI Type 2 - WMM IE */
 905                                         if (pos[4] == 0) {
 906                                                 elems->wmm_info = pos;
 907                                                 elems->wmm_info_len = elen;
 908                                         } else if (pos[4] == 1) {
 909                                                 elems->wmm_param = pos;
 910                                                 elems->wmm_param_len = elen;
 911                                         }
 912                                 }
 913                         }
 914                         break;
 915                 case WLAN_EID_RSN:
 916                         elems->rsn = pos;
 917                         elems->rsn_len = elen;
 918                         break;
 919                 case WLAN_EID_ERP_INFO:
 920                         if (elen >= 1)
 921                                 elems->erp_info = pos;
 922                         else
 923                                 elem_parse_failed = true;
 924                         break;
 925                 case WLAN_EID_EXT_SUPP_RATES:
 926                         elems->ext_supp_rates = pos;
 927                         elems->ext_supp_rates_len = elen;
 928                         break;
 929                 case WLAN_EID_HT_CAPABILITY:
 930                         if (elen >= sizeof(struct ieee80211_ht_cap))
 931                                 elems->ht_cap_elem = (void *)pos;
 932                         else
 933                                 elem_parse_failed = true;
 934                         break;
 935                 case WLAN_EID_HT_OPERATION:
 936                         if (elen >= sizeof(struct ieee80211_ht_operation))
 937                                 elems->ht_operation = (void *)pos;
 938                         else
 939                                 elem_parse_failed = true;
 940                         break;
 941                 case WLAN_EID_VHT_CAPABILITY:
 942                         if (elen >= sizeof(struct ieee80211_vht_cap))
 943                                 elems->vht_cap_elem = (void *)pos;
 944                         else
 945                                 elem_parse_failed = true;
 946                         break;
 947                 case WLAN_EID_VHT_OPERATION:
 948                         if (elen >= sizeof(struct ieee80211_vht_operation))
 949                                 elems->vht_operation = (void *)pos;
 950                         else
 951                                 elem_parse_failed = true;
 952                         break;
 953                 case WLAN_EID_OPMODE_NOTIF:
 954                         if (elen > 0)
 955                                 elems->opmode_notif = pos;
 956                         else
 957                                 elem_parse_failed = true;
 958                         break;
 959                 case WLAN_EID_MESH_ID:
 960                         elems->mesh_id = pos;
 961                         elems->mesh_id_len = elen;
 962                         break;
 963                 case WLAN_EID_MESH_CONFIG:
 964                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 965                                 elems->mesh_config = (void *)pos;
 966                         else
 967                                 elem_parse_failed = true;
 968                         break;
 969                 case WLAN_EID_PEER_MGMT:
 970                         elems->peering = pos;
 971                         elems->peering_len = elen;
 972                         break;
 973                 case WLAN_EID_MESH_AWAKE_WINDOW:
 974                         if (elen >= 2)
 975                                 elems->awake_window = (void *)pos;
 976                         break;
 977                 case WLAN_EID_PREQ:
 978                         elems->preq = pos;
 979                         elems->preq_len = elen;
 980                         break;
 981                 case WLAN_EID_PREP:
 982                         elems->prep = pos;
 983                         elems->prep_len = elen;
 984                         break;
 985                 case WLAN_EID_PERR:
 986                         elems->perr = pos;
 987                         elems->perr_len = elen;
 988                         break;
 989                 case WLAN_EID_RANN:
 990                         if (elen >= sizeof(struct ieee80211_rann_ie))
 991                                 elems->rann = (void *)pos;
 992                         else
 993                                 elem_parse_failed = true;
 994                         break;
 995                 case WLAN_EID_CHANNEL_SWITCH:
 996                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 997                                 elem_parse_failed = true;
 998                                 break;
 999                         }
1000                         elems->ch_switch_ie = (void *)pos;
1001                         break;
1002                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004                                 elem_parse_failed = true;
1005                                 break;
1006                         }
1007                         elems->ext_chansw_ie = (void *)pos;
1008                         break;
1009                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011                                 elem_parse_failed = true;
1012                                 break;
1013                         }
1014                         elems->sec_chan_offs = (void *)pos;
1015                         break;
1016                 case WLAN_EID_CHAN_SWITCH_PARAM:
1017                         if (elen !=
1018                             sizeof(*elems->mesh_chansw_params_ie)) {
1019                                 elem_parse_failed = true;
1020                                 break;
1021                         }
1022                         elems->mesh_chansw_params_ie = (void *)pos;
1023                         break;
1024                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1025                         if (!action ||
1026                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027                                 elem_parse_failed = true;
1028                                 break;
1029                         }
1030                         elems->wide_bw_chansw_ie = (void *)pos;
1031                         break;
1032                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1033                         if (action) {
1034                                 elem_parse_failed = true;
1035                                 break;
1036                         }
1037                         /*
1038                          * This is a bit tricky, but as we only care about
1039                          * the wide bandwidth channel switch element, so
1040                          * just parse it out manually.
1041                          */
1042                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1043                                               pos, elen);
1044                         if (ie) {
1045                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046                                         elems->wide_bw_chansw_ie =
1047                                                 (void *)(ie + 2);
1048                                 else
1049                                         elem_parse_failed = true;
1050                         }
1051                         break;
1052                 case WLAN_EID_COUNTRY:
1053                         elems->country_elem = pos;
1054                         elems->country_elem_len = elen;
1055                         break;
1056                 case WLAN_EID_PWR_CONSTRAINT:
1057                         if (elen != 1) {
1058                                 elem_parse_failed = true;
1059                                 break;
1060                         }
1061                         elems->pwr_constr_elem = pos;
1062                         break;
1063                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064                         /* Lots of different options exist, but we only care
1065                          * about the Dynamic Transmit Power Control element.
1066                          * First check for the Cisco OUI, then for the DTPC
1067                          * tag (0x00).
1068                          */
1069                         if (elen < 4) {
1070                                 elem_parse_failed = true;
1071                                 break;
1072                         }
1073
1074                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075                             pos[2] != 0x96 || pos[3] != 0x00)
1076                                 break;
1077
1078                         if (elen != 6) {
1079                                 elem_parse_failed = true;
1080                                 break;
1081                         }
1082
1083                         if (calc_crc)
1084                                 crc = crc32_be(crc, pos - 2, elen + 2);
1085
1086                         elems->cisco_dtpc_elem = pos;
1087                         break;
1088                 case WLAN_EID_TIMEOUT_INTERVAL:
1089                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090                                 elems->timeout_int = (void *)pos;
1091                         else
1092                                 elem_parse_failed = true;
1093                         break;
1094                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1095                         if (elen >= sizeof(*elems->max_idle_period_ie))
1096                                 elems->max_idle_period_ie = (void *)pos;
1097                         break;
1098                 case WLAN_EID_EXTENSION:
1099                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1100                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1101                                 elems->mu_edca_param_set = (void *)&pos[1];
1102                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1103                                 elems->he_cap = (void *)&pos[1];
1104                                 elems->he_cap_len = elen - 1;
1105                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1106                                    elen >= sizeof(*elems->he_operation) &&
1107                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1108                                 elems->he_operation = (void *)&pos[1];
1109                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1110                                 elems->uora_element = (void *)&pos[1];
1111                         }
1112                         break;
1113                 default:
1114                         break;
1115                 }
1116
1117                 if (elem_parse_failed)
1118                         elems->parse_error = true;
1119                 else
1120                         __set_bit(id, seen_elems);
1121
1122                 left -= elen;
1123                 pos += elen;
1124         }
1125
1126         if (left != 0)
1127                 elems->parse_error = true;
1128
1129         return crc;
1130 }
1131
1132 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1133                                            struct ieee80211_tx_queue_params
1134                                            *qparam, int ac)
1135 {
1136         struct ieee80211_chanctx_conf *chanctx_conf;
1137         const struct ieee80211_reg_rule *rrule;
1138         const struct ieee80211_wmm_ac *wmm_ac;
1139         u16 center_freq = 0;
1140
1141         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1142             sdata->vif.type != NL80211_IFTYPE_STATION)
1143                 return;
1144
1145         rcu_read_lock();
1146         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1147         if (chanctx_conf)
1148                 center_freq = chanctx_conf->def.chan->center_freq;
1149
1150         if (!center_freq) {
1151                 rcu_read_unlock();
1152                 return;
1153         }
1154
1155         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1156
1157         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1158                 rcu_read_unlock();
1159                 return;
1160         }
1161
1162         if (sdata->vif.type == NL80211_IFTYPE_AP)
1163                 wmm_ac = &rrule->wmm_rule.ap[ac];
1164         else
1165                 wmm_ac = &rrule->wmm_rule.client[ac];
1166         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1167         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1168         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1169         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1170         rcu_read_unlock();
1171 }
1172
1173 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1174                                bool bss_notify, bool enable_qos)
1175 {
1176         struct ieee80211_local *local = sdata->local;
1177         struct ieee80211_tx_queue_params qparam;
1178         struct ieee80211_chanctx_conf *chanctx_conf;
1179         int ac;
1180         bool use_11b;
1181         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1182         int aCWmin, aCWmax;
1183
1184         if (!local->ops->conf_tx)
1185                 return;
1186
1187         if (local->hw.queues < IEEE80211_NUM_ACS)
1188                 return;
1189
1190         memset(&qparam, 0, sizeof(qparam));
1191
1192         rcu_read_lock();
1193         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1194         use_11b = (chanctx_conf &&
1195                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1196                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1197         rcu_read_unlock();
1198
1199         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1200
1201         /* Set defaults according to 802.11-2007 Table 7-37 */
1202         aCWmax = 1023;
1203         if (use_11b)
1204                 aCWmin = 31;
1205         else
1206                 aCWmin = 15;
1207
1208         /* Confiure old 802.11b/g medium access rules. */
1209         qparam.cw_max = aCWmax;
1210         qparam.cw_min = aCWmin;
1211         qparam.txop = 0;
1212         qparam.aifs = 2;
1213
1214         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1215                 /* Update if QoS is enabled. */
1216                 if (enable_qos) {
1217                         switch (ac) {
1218                         case IEEE80211_AC_BK:
1219                                 qparam.cw_max = aCWmax;
1220                                 qparam.cw_min = aCWmin;
1221                                 qparam.txop = 0;
1222                                 if (is_ocb)
1223                                         qparam.aifs = 9;
1224                                 else
1225                                         qparam.aifs = 7;
1226                                 break;
1227                         /* never happens but let's not leave undefined */
1228                         default:
1229                         case IEEE80211_AC_BE:
1230                                 qparam.cw_max = aCWmax;
1231                                 qparam.cw_min = aCWmin;
1232                                 qparam.txop = 0;
1233                                 if (is_ocb)
1234                                         qparam.aifs = 6;
1235                                 else
1236                                         qparam.aifs = 3;
1237                                 break;
1238                         case IEEE80211_AC_VI:
1239                                 qparam.cw_max = aCWmin;
1240                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1241                                 if (is_ocb)
1242                                         qparam.txop = 0;
1243                                 else if (use_11b)
1244                                         qparam.txop = 6016/32;
1245                                 else
1246                                         qparam.txop = 3008/32;
1247
1248                                 if (is_ocb)
1249                                         qparam.aifs = 3;
1250                                 else
1251                                         qparam.aifs = 2;
1252                                 break;
1253                         case IEEE80211_AC_VO:
1254                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1255                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1256                                 if (is_ocb)
1257                                         qparam.txop = 0;
1258                                 else if (use_11b)
1259                                         qparam.txop = 3264/32;
1260                                 else
1261                                         qparam.txop = 1504/32;
1262                                 qparam.aifs = 2;
1263                                 break;
1264                         }
1265                 }
1266                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1267
1268                 qparam.uapsd = false;
1269
1270                 sdata->tx_conf[ac] = qparam;
1271                 drv_conf_tx(local, sdata, ac, &qparam);
1272         }
1273
1274         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1275             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1276             sdata->vif.type != NL80211_IFTYPE_NAN) {
1277                 sdata->vif.bss_conf.qos = enable_qos;
1278                 if (bss_notify)
1279                         ieee80211_bss_info_change_notify(sdata,
1280                                                          BSS_CHANGED_QOS);
1281         }
1282 }
1283
1284 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1285                          u16 transaction, u16 auth_alg, u16 status,
1286                          const u8 *extra, size_t extra_len, const u8 *da,
1287                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1288                          u32 tx_flags)
1289 {
1290         struct ieee80211_local *local = sdata->local;
1291         struct sk_buff *skb;
1292         struct ieee80211_mgmt *mgmt;
1293         int err;
1294
1295         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1296         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1297                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1298         if (!skb)
1299                 return;
1300
1301         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1302
1303         mgmt = skb_put_zero(skb, 24 + 6);
1304         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1305                                           IEEE80211_STYPE_AUTH);
1306         memcpy(mgmt->da, da, ETH_ALEN);
1307         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1308         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1309         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1310         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1311         mgmt->u.auth.status_code = cpu_to_le16(status);
1312         if (extra)
1313                 skb_put_data(skb, extra, extra_len);
1314
1315         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1316                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1317                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1318                 WARN_ON(err);
1319         }
1320
1321         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1322                                         tx_flags;
1323         ieee80211_tx_skb(sdata, skb);
1324 }
1325
1326 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1327                                     const u8 *bssid, u16 stype, u16 reason,
1328                                     bool send_frame, u8 *frame_buf)
1329 {
1330         struct ieee80211_local *local = sdata->local;
1331         struct sk_buff *skb;
1332         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1333
1334         /* build frame */
1335         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1336         mgmt->duration = 0; /* initialize only */
1337         mgmt->seq_ctrl = 0; /* initialize only */
1338         memcpy(mgmt->da, bssid, ETH_ALEN);
1339         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1340         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1341         /* u.deauth.reason_code == u.disassoc.reason_code */
1342         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1343
1344         if (send_frame) {
1345                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1346                                     IEEE80211_DEAUTH_FRAME_LEN);
1347                 if (!skb)
1348                         return;
1349
1350                 skb_reserve(skb, local->hw.extra_tx_headroom);
1351
1352                 /* copy in frame */
1353                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1354
1355                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1356                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1357                         IEEE80211_SKB_CB(skb)->flags |=
1358                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1359
1360                 ieee80211_tx_skb(sdata, skb);
1361         }
1362 }
1363
1364 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1365                                          u8 *buffer, size_t buffer_len,
1366                                          const u8 *ie, size_t ie_len,
1367                                          enum nl80211_band band,
1368                                          u32 rate_mask,
1369                                          struct cfg80211_chan_def *chandef,
1370                                          size_t *offset, u32 flags)
1371 {
1372         struct ieee80211_supported_band *sband;
1373         const struct ieee80211_sta_he_cap *he_cap;
1374         u8 *pos = buffer, *end = buffer + buffer_len;
1375         size_t noffset;
1376         int supp_rates_len, i;
1377         u8 rates[32];
1378         int num_rates;
1379         int ext_rates_len;
1380         int shift;
1381         u32 rate_flags;
1382         bool have_80mhz = false;
1383
1384         *offset = 0;
1385
1386         sband = local->hw.wiphy->bands[band];
1387         if (WARN_ON_ONCE(!sband))
1388                 return 0;
1389
1390         rate_flags = ieee80211_chandef_rate_flags(chandef);
1391         shift = ieee80211_chandef_get_shift(chandef);
1392
1393         num_rates = 0;
1394         for (i = 0; i < sband->n_bitrates; i++) {
1395                 if ((BIT(i) & rate_mask) == 0)
1396                         continue; /* skip rate */
1397                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1398                         continue;
1399
1400                 rates[num_rates++] =
1401                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1402                                           (1 << shift) * 5);
1403         }
1404
1405         supp_rates_len = min_t(int, num_rates, 8);
1406
1407         if (end - pos < 2 + supp_rates_len)
1408                 goto out_err;
1409         *pos++ = WLAN_EID_SUPP_RATES;
1410         *pos++ = supp_rates_len;
1411         memcpy(pos, rates, supp_rates_len);
1412         pos += supp_rates_len;
1413
1414         /* insert "request information" if in custom IEs */
1415         if (ie && ie_len) {
1416                 static const u8 before_extrates[] = {
1417                         WLAN_EID_SSID,
1418                         WLAN_EID_SUPP_RATES,
1419                         WLAN_EID_REQUEST,
1420                 };
1421                 noffset = ieee80211_ie_split(ie, ie_len,
1422                                              before_extrates,
1423                                              ARRAY_SIZE(before_extrates),
1424                                              *offset);
1425                 if (end - pos < noffset - *offset)
1426                         goto out_err;
1427                 memcpy(pos, ie + *offset, noffset - *offset);
1428                 pos += noffset - *offset;
1429                 *offset = noffset;
1430         }
1431
1432         ext_rates_len = num_rates - supp_rates_len;
1433         if (ext_rates_len > 0) {
1434                 if (end - pos < 2 + ext_rates_len)
1435                         goto out_err;
1436                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1437                 *pos++ = ext_rates_len;
1438                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1439                 pos += ext_rates_len;
1440         }
1441
1442         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1443                 if (end - pos < 3)
1444                         goto out_err;
1445                 *pos++ = WLAN_EID_DS_PARAMS;
1446                 *pos++ = 1;
1447                 *pos++ = ieee80211_frequency_to_channel(
1448                                 chandef->chan->center_freq);
1449         }
1450
1451         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1452                 goto done;
1453
1454         /* insert custom IEs that go before HT */
1455         if (ie && ie_len) {
1456                 static const u8 before_ht[] = {
1457                         /*
1458                          * no need to list the ones split off already
1459                          * (or generated here)
1460                          */
1461                         WLAN_EID_DS_PARAMS,
1462                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1463                 };
1464                 noffset = ieee80211_ie_split(ie, ie_len,
1465                                              before_ht, ARRAY_SIZE(before_ht),
1466                                              *offset);
1467                 if (end - pos < noffset - *offset)
1468                         goto out_err;
1469                 memcpy(pos, ie + *offset, noffset - *offset);
1470                 pos += noffset - *offset;
1471                 *offset = noffset;
1472         }
1473
1474         if (sband->ht_cap.ht_supported) {
1475                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1476                         goto out_err;
1477                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1478                                                 sband->ht_cap.cap);
1479         }
1480
1481         /* insert custom IEs that go before VHT */
1482         if (ie && ie_len) {
1483                 static const u8 before_vht[] = {
1484                         /*
1485                          * no need to list the ones split off already
1486                          * (or generated here)
1487                          */
1488                         WLAN_EID_BSS_COEX_2040,
1489                         WLAN_EID_EXT_CAPABILITY,
1490                         WLAN_EID_SSID_LIST,
1491                         WLAN_EID_CHANNEL_USAGE,
1492                         WLAN_EID_INTERWORKING,
1493                         WLAN_EID_MESH_ID,
1494                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1495                 };
1496                 noffset = ieee80211_ie_split(ie, ie_len,
1497                                              before_vht, ARRAY_SIZE(before_vht),
1498                                              *offset);
1499                 if (end - pos < noffset - *offset)
1500                         goto out_err;
1501                 memcpy(pos, ie + *offset, noffset - *offset);
1502                 pos += noffset - *offset;
1503                 *offset = noffset;
1504         }
1505
1506         /* Check if any channel in this sband supports at least 80 MHz */
1507         for (i = 0; i < sband->n_channels; i++) {
1508                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1509                                                 IEEE80211_CHAN_NO_80MHZ))
1510                         continue;
1511
1512                 have_80mhz = true;
1513                 break;
1514         }
1515
1516         if (sband->vht_cap.vht_supported && have_80mhz) {
1517                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1518                         goto out_err;
1519                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1520                                                  sband->vht_cap.cap);
1521         }
1522
1523         /* insert custom IEs that go before HE */
1524         if (ie && ie_len) {
1525                 static const u8 before_he[] = {
1526                         /*
1527                          * no need to list the ones split off before VHT
1528                          * or generated here
1529                          */
1530                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1531                         WLAN_EID_AP_CSN,
1532                         /* TODO: add 11ah/11aj/11ak elements */
1533                 };
1534                 noffset = ieee80211_ie_split(ie, ie_len,
1535                                              before_he, ARRAY_SIZE(before_he),
1536                                              *offset);
1537                 if (end - pos < noffset - *offset)
1538                         goto out_err;
1539                 memcpy(pos, ie + *offset, noffset - *offset);
1540                 pos += noffset - *offset;
1541                 *offset = noffset;
1542         }
1543
1544         he_cap = ieee80211_get_he_sta_cap(sband);
1545         if (he_cap) {
1546                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1547                 if (!pos)
1548                         goto out_err;
1549         }
1550
1551         /*
1552          * If adding more here, adjust code in main.c
1553          * that calculates local->scan_ies_len.
1554          */
1555
1556         return pos - buffer;
1557  out_err:
1558         WARN_ONCE(1, "not enough space for preq IEs\n");
1559  done:
1560         return pos - buffer;
1561 }
1562
1563 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1564                              size_t buffer_len,
1565                              struct ieee80211_scan_ies *ie_desc,
1566                              const u8 *ie, size_t ie_len,
1567                              u8 bands_used, u32 *rate_masks,
1568                              struct cfg80211_chan_def *chandef,
1569                              u32 flags)
1570 {
1571         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1572         int i;
1573
1574         memset(ie_desc, 0, sizeof(*ie_desc));
1575
1576         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1577                 if (bands_used & BIT(i)) {
1578                         pos += ieee80211_build_preq_ies_band(local,
1579                                                              buffer + pos,
1580                                                              buffer_len - pos,
1581                                                              ie, ie_len, i,
1582                                                              rate_masks[i],
1583                                                              chandef,
1584                                                              &custom_ie_offset,
1585                                                              flags);
1586                         ie_desc->ies[i] = buffer + old_pos;
1587                         ie_desc->len[i] = pos - old_pos;
1588                         old_pos = pos;
1589                 }
1590         }
1591
1592         /* add any remaining custom IEs */
1593         if (ie && ie_len) {
1594                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1595                               "not enough space for preq custom IEs\n"))
1596                         return pos;
1597                 memcpy(buffer + pos, ie + custom_ie_offset,
1598                        ie_len - custom_ie_offset);
1599                 ie_desc->common_ies = buffer + pos;
1600                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1601                 pos += ie_len - custom_ie_offset;
1602         }
1603
1604         return pos;
1605 };
1606
1607 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1608                                           const u8 *src, const u8 *dst,
1609                                           u32 ratemask,
1610                                           struct ieee80211_channel *chan,
1611                                           const u8 *ssid, size_t ssid_len,
1612                                           const u8 *ie, size_t ie_len,
1613                                           u32 flags)
1614 {
1615         struct ieee80211_local *local = sdata->local;
1616         struct cfg80211_chan_def chandef;
1617         struct sk_buff *skb;
1618         struct ieee80211_mgmt *mgmt;
1619         int ies_len;
1620         u32 rate_masks[NUM_NL80211_BANDS] = {};
1621         struct ieee80211_scan_ies dummy_ie_desc;
1622
1623         /*
1624          * Do not send DS Channel parameter for directed probe requests
1625          * in order to maximize the chance that we get a response.  Some
1626          * badly-behaved APs don't respond when this parameter is included.
1627          */
1628         chandef.width = sdata->vif.bss_conf.chandef.width;
1629         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1630                 chandef.chan = NULL;
1631         else
1632                 chandef.chan = chan;
1633
1634         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1635                                      100 + ie_len);
1636         if (!skb)
1637                 return NULL;
1638
1639         rate_masks[chan->band] = ratemask;
1640         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1641                                            skb_tailroom(skb), &dummy_ie_desc,
1642                                            ie, ie_len, BIT(chan->band),
1643                                            rate_masks, &chandef, flags);
1644         skb_put(skb, ies_len);
1645
1646         if (dst) {
1647                 mgmt = (struct ieee80211_mgmt *) skb->data;
1648                 memcpy(mgmt->da, dst, ETH_ALEN);
1649                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1650         }
1651
1652         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1653
1654         return skb;
1655 }
1656
1657 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1658                             struct ieee802_11_elems *elems,
1659                             enum nl80211_band band, u32 *basic_rates)
1660 {
1661         struct ieee80211_supported_band *sband;
1662         size_t num_rates;
1663         u32 supp_rates, rate_flags;
1664         int i, j, shift;
1665
1666         sband = sdata->local->hw.wiphy->bands[band];
1667         if (WARN_ON(!sband))
1668                 return 1;
1669
1670         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1671         shift = ieee80211_vif_get_shift(&sdata->vif);
1672
1673         num_rates = sband->n_bitrates;
1674         supp_rates = 0;
1675         for (i = 0; i < elems->supp_rates_len +
1676                      elems->ext_supp_rates_len; i++) {
1677                 u8 rate = 0;
1678                 int own_rate;
1679                 bool is_basic;
1680                 if (i < elems->supp_rates_len)
1681                         rate = elems->supp_rates[i];
1682                 else if (elems->ext_supp_rates)
1683                         rate = elems->ext_supp_rates
1684                                 [i - elems->supp_rates_len];
1685                 own_rate = 5 * (rate & 0x7f);
1686                 is_basic = !!(rate & 0x80);
1687
1688                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1689                         continue;
1690
1691                 for (j = 0; j < num_rates; j++) {
1692                         int brate;
1693                         if ((rate_flags & sband->bitrates[j].flags)
1694                             != rate_flags)
1695                                 continue;
1696
1697                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1698                                              1 << shift);
1699
1700                         if (brate == own_rate) {
1701                                 supp_rates |= BIT(j);
1702                                 if (basic_rates && is_basic)
1703                                         *basic_rates |= BIT(j);
1704                         }
1705                 }
1706         }
1707         return supp_rates;
1708 }
1709
1710 void ieee80211_stop_device(struct ieee80211_local *local)
1711 {
1712         ieee80211_led_radio(local, false);
1713         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1714
1715         cancel_work_sync(&local->reconfig_filter);
1716
1717         flush_workqueue(local->workqueue);
1718         drv_stop(local);
1719 }
1720
1721 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1722                                            bool aborted)
1723 {
1724         /* It's possible that we don't handle the scan completion in
1725          * time during suspend, so if it's still marked as completed
1726          * here, queue the work and flush it to clean things up.
1727          * Instead of calling the worker function directly here, we
1728          * really queue it to avoid potential races with other flows
1729          * scheduling the same work.
1730          */
1731         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1732                 /* If coming from reconfiguration failure, abort the scan so
1733                  * we don't attempt to continue a partial HW scan - which is
1734                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1735                  * completed scan, and a 5 GHz portion is still pending.
1736                  */
1737                 if (aborted)
1738                         set_bit(SCAN_ABORTED, &local->scanning);
1739                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1740                 flush_delayed_work(&local->scan_work);
1741         }
1742 }
1743
1744 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1745 {
1746         struct ieee80211_sub_if_data *sdata;
1747         struct ieee80211_chanctx *ctx;
1748
1749         /*
1750          * We get here if during resume the device can't be restarted properly.
1751          * We might also get here if this happens during HW reset, which is a
1752          * slightly different situation and we need to drop all connections in
1753          * the latter case.
1754          *
1755          * Ask cfg80211 to turn off all interfaces, this will result in more
1756          * warnings but at least we'll then get into a clean stopped state.
1757          */
1758
1759         local->resuming = false;
1760         local->suspended = false;
1761         local->in_reconfig = false;
1762
1763         ieee80211_flush_completed_scan(local, true);
1764
1765         /* scheduled scan clearly can't be running any more, but tell
1766          * cfg80211 and clear local state
1767          */
1768         ieee80211_sched_scan_end(local);
1769
1770         list_for_each_entry(sdata, &local->interfaces, list)
1771                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1772
1773         /* Mark channel contexts as not being in the driver any more to avoid
1774          * removing them from the driver during the shutdown process...
1775          */
1776         mutex_lock(&local->chanctx_mtx);
1777         list_for_each_entry(ctx, &local->chanctx_list, list)
1778                 ctx->driver_present = false;
1779         mutex_unlock(&local->chanctx_mtx);
1780
1781         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1782 }
1783
1784 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1785                                      struct ieee80211_sub_if_data *sdata)
1786 {
1787         struct ieee80211_chanctx_conf *conf;
1788         struct ieee80211_chanctx *ctx;
1789
1790         if (!local->use_chanctx)
1791                 return;
1792
1793         mutex_lock(&local->chanctx_mtx);
1794         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1795                                          lockdep_is_held(&local->chanctx_mtx));
1796         if (conf) {
1797                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1798                 drv_assign_vif_chanctx(local, sdata, ctx);
1799         }
1800         mutex_unlock(&local->chanctx_mtx);
1801 }
1802
1803 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1804 {
1805         struct ieee80211_local *local = sdata->local;
1806         struct sta_info *sta;
1807
1808         /* add STAs back */
1809         mutex_lock(&local->sta_mtx);
1810         list_for_each_entry(sta, &local->sta_list, list) {
1811                 enum ieee80211_sta_state state;
1812
1813                 if (!sta->uploaded || sta->sdata != sdata)
1814                         continue;
1815
1816                 for (state = IEEE80211_STA_NOTEXIST;
1817                      state < sta->sta_state; state++)
1818                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1819                                               state + 1));
1820         }
1821         mutex_unlock(&local->sta_mtx);
1822 }
1823
1824 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1825 {
1826         struct cfg80211_nan_func *func, **funcs;
1827         int res, id, i = 0;
1828
1829         res = drv_start_nan(sdata->local, sdata,
1830                             &sdata->u.nan.conf);
1831         if (WARN_ON(res))
1832                 return res;
1833
1834         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1835                         sizeof(*funcs),
1836                         GFP_KERNEL);
1837         if (!funcs)
1838                 return -ENOMEM;
1839
1840         /* Add all the functions:
1841          * This is a little bit ugly. We need to call a potentially sleeping
1842          * callback for each NAN function, so we can't hold the spinlock.
1843          */
1844         spin_lock_bh(&sdata->u.nan.func_lock);
1845
1846         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1847                 funcs[i++] = func;
1848
1849         spin_unlock_bh(&sdata->u.nan.func_lock);
1850
1851         for (i = 0; funcs[i]; i++) {
1852                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1853                 if (WARN_ON(res))
1854                         ieee80211_nan_func_terminated(&sdata->vif,
1855                                                       funcs[i]->instance_id,
1856                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1857                                                       GFP_KERNEL);
1858         }
1859
1860         kfree(funcs);
1861
1862         return 0;
1863 }
1864
1865 int ieee80211_reconfig(struct ieee80211_local *local)
1866 {
1867         struct ieee80211_hw *hw = &local->hw;
1868         struct ieee80211_sub_if_data *sdata;
1869         struct ieee80211_chanctx *ctx;
1870         struct sta_info *sta;
1871         int res, i;
1872         bool reconfig_due_to_wowlan = false;
1873         struct ieee80211_sub_if_data *sched_scan_sdata;
1874         struct cfg80211_sched_scan_request *sched_scan_req;
1875         bool sched_scan_stopped = false;
1876         bool suspended = local->suspended;
1877
1878         /* nothing to do if HW shouldn't run */
1879         if (!local->open_count)
1880                 goto wake_up;
1881
1882 #ifdef CONFIG_PM
1883         if (suspended)
1884                 local->resuming = true;
1885
1886         if (local->wowlan) {
1887                 /*
1888                  * In the wowlan case, both mac80211 and the device
1889                  * are functional when the resume op is called, so
1890                  * clear local->suspended so the device could operate
1891                  * normally (e.g. pass rx frames).
1892                  */
1893                 local->suspended = false;
1894                 res = drv_resume(local);
1895                 local->wowlan = false;
1896                 if (res < 0) {
1897                         local->resuming = false;
1898                         return res;
1899                 }
1900                 if (res == 0)
1901                         goto wake_up;
1902                 WARN_ON(res > 1);
1903                 /*
1904                  * res is 1, which means the driver requested
1905                  * to go through a regular reset on wakeup.
1906                  * restore local->suspended in this case.
1907                  */
1908                 reconfig_due_to_wowlan = true;
1909                 local->suspended = true;
1910         }
1911 #endif
1912
1913         /*
1914          * In case of hw_restart during suspend (without wowlan),
1915          * cancel restart work, as we are reconfiguring the device
1916          * anyway.
1917          * Note that restart_work is scheduled on a frozen workqueue,
1918          * so we can't deadlock in this case.
1919          */
1920         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1921                 cancel_work_sync(&local->restart_work);
1922
1923         local->started = false;
1924
1925         /*
1926          * Upon resume hardware can sometimes be goofy due to
1927          * various platform / driver / bus issues, so restarting
1928          * the device may at times not work immediately. Propagate
1929          * the error.
1930          */
1931         res = drv_start(local);
1932         if (res) {
1933                 if (suspended)
1934                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1935                 else
1936                         WARN(1, "Hardware became unavailable during restart.\n");
1937                 ieee80211_handle_reconfig_failure(local);
1938                 return res;
1939         }
1940
1941         /* setup fragmentation threshold */
1942         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1943
1944         /* setup RTS threshold */
1945         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1946
1947         /* reset coverage class */
1948         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1949
1950         ieee80211_led_radio(local, true);
1951         ieee80211_mod_tpt_led_trig(local,
1952                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1953
1954         /* add interfaces */
1955         sdata = rtnl_dereference(local->monitor_sdata);
1956         if (sdata) {
1957                 /* in HW restart it exists already */
1958                 WARN_ON(local->resuming);
1959                 res = drv_add_interface(local, sdata);
1960                 if (WARN_ON(res)) {
1961                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1962                         synchronize_net();
1963                         kfree(sdata);
1964                 }
1965         }
1966
1967         list_for_each_entry(sdata, &local->interfaces, list) {
1968                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1969                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1970                     ieee80211_sdata_running(sdata)) {
1971                         res = drv_add_interface(local, sdata);
1972                         if (WARN_ON(res))
1973                                 break;
1974                 }
1975         }
1976
1977         /* If adding any of the interfaces failed above, roll back and
1978          * report failure.
1979          */
1980         if (res) {
1981                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1982                                                      list)
1983                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1984                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1985                             ieee80211_sdata_running(sdata))
1986                                 drv_remove_interface(local, sdata);
1987                 ieee80211_handle_reconfig_failure(local);
1988                 return res;
1989         }
1990
1991         /* add channel contexts */
1992         if (local->use_chanctx) {
1993                 mutex_lock(&local->chanctx_mtx);
1994                 list_for_each_entry(ctx, &local->chanctx_list, list)
1995                         if (ctx->replace_state !=
1996                             IEEE80211_CHANCTX_REPLACES_OTHER)
1997                                 WARN_ON(drv_add_chanctx(local, ctx));
1998                 mutex_unlock(&local->chanctx_mtx);
1999
2000                 sdata = rtnl_dereference(local->monitor_sdata);
2001                 if (sdata && ieee80211_sdata_running(sdata))
2002                         ieee80211_assign_chanctx(local, sdata);
2003         }
2004
2005         /* reconfigure hardware */
2006         ieee80211_hw_config(local, ~0);
2007
2008         ieee80211_configure_filter(local);
2009
2010         /* Finally also reconfigure all the BSS information */
2011         list_for_each_entry(sdata, &local->interfaces, list) {
2012                 u32 changed;
2013
2014                 if (!ieee80211_sdata_running(sdata))
2015                         continue;
2016
2017                 ieee80211_assign_chanctx(local, sdata);
2018
2019                 switch (sdata->vif.type) {
2020                 case NL80211_IFTYPE_AP_VLAN:
2021                 case NL80211_IFTYPE_MONITOR:
2022                         break;
2023                 default:
2024                         ieee80211_reconfig_stations(sdata);
2025                         /* fall through */
2026                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2027                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2028                                 drv_conf_tx(local, sdata, i,
2029                                             &sdata->tx_conf[i]);
2030                         break;
2031                 }
2032
2033                 /* common change flags for all interface types */
2034                 changed = BSS_CHANGED_ERP_CTS_PROT |
2035                           BSS_CHANGED_ERP_PREAMBLE |
2036                           BSS_CHANGED_ERP_SLOT |
2037                           BSS_CHANGED_HT |
2038                           BSS_CHANGED_BASIC_RATES |
2039                           BSS_CHANGED_BEACON_INT |
2040                           BSS_CHANGED_BSSID |
2041                           BSS_CHANGED_CQM |
2042                           BSS_CHANGED_QOS |
2043                           BSS_CHANGED_IDLE |
2044                           BSS_CHANGED_TXPOWER |
2045                           BSS_CHANGED_MCAST_RATE;
2046
2047                 if (sdata->vif.mu_mimo_owner)
2048                         changed |= BSS_CHANGED_MU_GROUPS;
2049
2050                 switch (sdata->vif.type) {
2051                 case NL80211_IFTYPE_STATION:
2052                         changed |= BSS_CHANGED_ASSOC |
2053                                    BSS_CHANGED_ARP_FILTER |
2054                                    BSS_CHANGED_PS;
2055
2056                         /* Re-send beacon info report to the driver */
2057                         if (sdata->u.mgd.have_beacon)
2058                                 changed |= BSS_CHANGED_BEACON_INFO;
2059
2060                         if (sdata->vif.bss_conf.max_idle_period ||
2061                             sdata->vif.bss_conf.protected_keep_alive)
2062                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2063
2064                         sdata_lock(sdata);
2065                         ieee80211_bss_info_change_notify(sdata, changed);
2066                         sdata_unlock(sdata);
2067                         break;
2068                 case NL80211_IFTYPE_OCB:
2069                         changed |= BSS_CHANGED_OCB;
2070                         ieee80211_bss_info_change_notify(sdata, changed);
2071                         break;
2072                 case NL80211_IFTYPE_ADHOC:
2073                         changed |= BSS_CHANGED_IBSS;
2074                         /* fall through */
2075                 case NL80211_IFTYPE_AP:
2076                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2077
2078                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2079                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2080
2081                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2082                                         drv_start_ap(local, sdata);
2083                         }
2084
2085                         /* fall through */
2086                 case NL80211_IFTYPE_MESH_POINT:
2087                         if (sdata->vif.bss_conf.enable_beacon) {
2088                                 changed |= BSS_CHANGED_BEACON |
2089                                            BSS_CHANGED_BEACON_ENABLED;
2090                                 ieee80211_bss_info_change_notify(sdata, changed);
2091                         }
2092                         break;
2093                 case NL80211_IFTYPE_NAN:
2094                         res = ieee80211_reconfig_nan(sdata);
2095                         if (res < 0) {
2096                                 ieee80211_handle_reconfig_failure(local);
2097                                 return res;
2098                         }
2099                         break;
2100                 case NL80211_IFTYPE_WDS:
2101                 case NL80211_IFTYPE_AP_VLAN:
2102                 case NL80211_IFTYPE_MONITOR:
2103                 case NL80211_IFTYPE_P2P_DEVICE:
2104                         /* nothing to do */
2105                         break;
2106                 case NL80211_IFTYPE_UNSPECIFIED:
2107                 case NUM_NL80211_IFTYPES:
2108                 case NL80211_IFTYPE_P2P_CLIENT:
2109                 case NL80211_IFTYPE_P2P_GO:
2110                         WARN_ON(1);
2111                         break;
2112                 }
2113         }
2114
2115         ieee80211_recalc_ps(local);
2116
2117         /*
2118          * The sta might be in psm against the ap (e.g. because
2119          * this was the state before a hw restart), so we
2120          * explicitly send a null packet in order to make sure
2121          * it'll sync against the ap (and get out of psm).
2122          */
2123         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2124                 list_for_each_entry(sdata, &local->interfaces, list) {
2125                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2126                                 continue;
2127                         if (!sdata->u.mgd.associated)
2128                                 continue;
2129
2130                         ieee80211_send_nullfunc(local, sdata, false);
2131                 }
2132         }
2133
2134         /* APs are now beaconing, add back stations */
2135         mutex_lock(&local->sta_mtx);
2136         list_for_each_entry(sta, &local->sta_list, list) {
2137                 enum ieee80211_sta_state state;
2138
2139                 if (!sta->uploaded)
2140                         continue;
2141
2142                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2143                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2144                         continue;
2145
2146                 for (state = IEEE80211_STA_NOTEXIST;
2147                      state < sta->sta_state; state++)
2148                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2149                                               state + 1));
2150         }
2151         mutex_unlock(&local->sta_mtx);
2152
2153         /* add back keys */
2154         list_for_each_entry(sdata, &local->interfaces, list)
2155                 ieee80211_reset_crypto_tx_tailroom(sdata);
2156
2157         list_for_each_entry(sdata, &local->interfaces, list)
2158                 if (ieee80211_sdata_running(sdata))
2159                         ieee80211_enable_keys(sdata);
2160
2161         /* Reconfigure sched scan if it was interrupted by FW restart */
2162         mutex_lock(&local->mtx);
2163         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2164                                                 lockdep_is_held(&local->mtx));
2165         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2166                                                 lockdep_is_held(&local->mtx));
2167         if (sched_scan_sdata && sched_scan_req)
2168                 /*
2169                  * Sched scan stopped, but we don't want to report it. Instead,
2170                  * we're trying to reschedule. However, if more than one scan
2171                  * plan was set, we cannot reschedule since we don't know which
2172                  * scan plan was currently running (and some scan plans may have
2173                  * already finished).
2174                  */
2175                 if (sched_scan_req->n_scan_plans > 1 ||
2176                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2177                                                          sched_scan_req)) {
2178                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2179                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2180                         sched_scan_stopped = true;
2181                 }
2182         mutex_unlock(&local->mtx);
2183
2184         if (sched_scan_stopped)
2185                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2186
2187  wake_up:
2188
2189         if (local->monitors == local->open_count && local->monitors > 0)
2190                 ieee80211_add_virtual_monitor(local);
2191
2192         /*
2193          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2194          * sessions can be established after a resume.
2195          *
2196          * Also tear down aggregation sessions since reconfiguring
2197          * them in a hardware restart scenario is not easily done
2198          * right now, and the hardware will have lost information
2199          * about the sessions, but we and the AP still think they
2200          * are active. This is really a workaround though.
2201          */
2202         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2203                 mutex_lock(&local->sta_mtx);
2204
2205                 list_for_each_entry(sta, &local->sta_list, list) {
2206                         if (!local->resuming)
2207                                 ieee80211_sta_tear_down_BA_sessions(
2208                                                 sta, AGG_STOP_LOCAL_REQUEST);
2209                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2210                 }
2211
2212                 mutex_unlock(&local->sta_mtx);
2213         }
2214
2215         if (local->in_reconfig) {
2216                 local->in_reconfig = false;
2217                 barrier();
2218
2219                 /* Restart deferred ROCs */
2220                 mutex_lock(&local->mtx);
2221                 ieee80211_start_next_roc(local);
2222                 mutex_unlock(&local->mtx);
2223         }
2224
2225         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2226                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2227                                         false);
2228
2229         /*
2230          * If this is for hw restart things are still running.
2231          * We may want to change that later, however.
2232          */
2233         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2234                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2235
2236         if (!suspended)
2237                 return 0;
2238
2239 #ifdef CONFIG_PM
2240         /* first set suspended false, then resuming */
2241         local->suspended = false;
2242         mb();
2243         local->resuming = false;
2244
2245         ieee80211_flush_completed_scan(local, false);
2246
2247         if (local->open_count && !reconfig_due_to_wowlan)
2248                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2249
2250         list_for_each_entry(sdata, &local->interfaces, list) {
2251                 if (!ieee80211_sdata_running(sdata))
2252                         continue;
2253                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2254                         ieee80211_sta_restart(sdata);
2255         }
2256
2257         mod_timer(&local->sta_cleanup, jiffies + 1);
2258 #else
2259         WARN_ON(1);
2260 #endif
2261
2262         return 0;
2263 }
2264
2265 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2266 {
2267         struct ieee80211_sub_if_data *sdata;
2268         struct ieee80211_local *local;
2269         struct ieee80211_key *key;
2270
2271         if (WARN_ON(!vif))
2272                 return;
2273
2274         sdata = vif_to_sdata(vif);
2275         local = sdata->local;
2276
2277         if (WARN_ON(!local->resuming))
2278                 return;
2279
2280         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2281                 return;
2282
2283         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2284
2285         mutex_lock(&local->key_mtx);
2286         list_for_each_entry(key, &sdata->key_list, list)
2287                 key->flags |= KEY_FLAG_TAINTED;
2288         mutex_unlock(&local->key_mtx);
2289 }
2290 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2291
2292 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2293 {
2294         struct ieee80211_local *local = sdata->local;
2295         struct ieee80211_chanctx_conf *chanctx_conf;
2296         struct ieee80211_chanctx *chanctx;
2297
2298         mutex_lock(&local->chanctx_mtx);
2299
2300         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2301                                         lockdep_is_held(&local->chanctx_mtx));
2302
2303         /*
2304          * This function can be called from a work, thus it may be possible
2305          * that the chanctx_conf is removed (due to a disconnection, for
2306          * example).
2307          * So nothing should be done in such case.
2308          */
2309         if (!chanctx_conf)
2310                 goto unlock;
2311
2312         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2313         ieee80211_recalc_smps_chanctx(local, chanctx);
2314  unlock:
2315         mutex_unlock(&local->chanctx_mtx);
2316 }
2317
2318 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2319 {
2320         struct ieee80211_local *local = sdata->local;
2321         struct ieee80211_chanctx_conf *chanctx_conf;
2322         struct ieee80211_chanctx *chanctx;
2323
2324         mutex_lock(&local->chanctx_mtx);
2325
2326         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2327                                         lockdep_is_held(&local->chanctx_mtx));
2328
2329         if (WARN_ON_ONCE(!chanctx_conf))
2330                 goto unlock;
2331
2332         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2333         ieee80211_recalc_chanctx_min_def(local, chanctx);
2334  unlock:
2335         mutex_unlock(&local->chanctx_mtx);
2336 }
2337
2338 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2339 {
2340         size_t pos = offset;
2341
2342         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2343                 pos += 2 + ies[pos + 1];
2344
2345         return pos;
2346 }
2347
2348 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2349                                             int rssi_min_thold,
2350                                             int rssi_max_thold)
2351 {
2352         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2353
2354         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2355                 return;
2356
2357         /*
2358          * Scale up threshold values before storing it, as the RSSI averaging
2359          * algorithm uses a scaled up value as well. Change this scaling
2360          * factor if the RSSI averaging algorithm changes.
2361          */
2362         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2363         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2364 }
2365
2366 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2367                                     int rssi_min_thold,
2368                                     int rssi_max_thold)
2369 {
2370         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2371
2372         WARN_ON(rssi_min_thold == rssi_max_thold ||
2373                 rssi_min_thold > rssi_max_thold);
2374
2375         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2376                                        rssi_max_thold);
2377 }
2378 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2379
2380 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2381 {
2382         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2383
2384         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2385 }
2386 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2387
2388 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2389                               u16 cap)
2390 {
2391         __le16 tmp;
2392
2393         *pos++ = WLAN_EID_HT_CAPABILITY;
2394         *pos++ = sizeof(struct ieee80211_ht_cap);
2395         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2396
2397         /* capability flags */
2398         tmp = cpu_to_le16(cap);
2399         memcpy(pos, &tmp, sizeof(u16));
2400         pos += sizeof(u16);
2401
2402         /* AMPDU parameters */
2403         *pos++ = ht_cap->ampdu_factor |
2404                  (ht_cap->ampdu_density <<
2405                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2406
2407         /* MCS set */
2408         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2409         pos += sizeof(ht_cap->mcs);
2410
2411         /* extended capabilities */
2412         pos += sizeof(__le16);
2413
2414         /* BF capabilities */
2415         pos += sizeof(__le32);
2416
2417         /* antenna selection */
2418         pos += sizeof(u8);
2419
2420         return pos;
2421 }
2422
2423 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2424                                u32 cap)
2425 {
2426         __le32 tmp;
2427
2428         *pos++ = WLAN_EID_VHT_CAPABILITY;
2429         *pos++ = sizeof(struct ieee80211_vht_cap);
2430         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2431
2432         /* capability flags */
2433         tmp = cpu_to_le32(cap);
2434         memcpy(pos, &tmp, sizeof(u32));
2435         pos += sizeof(u32);
2436
2437         /* VHT MCS set */
2438         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2439         pos += sizeof(vht_cap->vht_mcs);
2440
2441         return pos;
2442 }
2443
2444 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2445                               const struct ieee80211_sta_he_cap *he_cap,
2446                               u8 *end)
2447 {
2448         u8 n;
2449         u8 ie_len;
2450         u8 *orig_pos = pos;
2451
2452         /* Make sure we have place for the IE */
2453         /*
2454          * TODO: the 1 added is because this temporarily is under the EXTENSION
2455          * IE. Get rid of it when it moves.
2456          */
2457         if (!he_cap)
2458                 return orig_pos;
2459
2460         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2461         ie_len = 2 + 1 +
2462                  sizeof(he_cap->he_cap_elem) + n +
2463                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2464                                        he_cap->he_cap_elem.phy_cap_info);
2465
2466         if ((end - pos) < ie_len)
2467                 return orig_pos;
2468
2469         *pos++ = WLAN_EID_EXTENSION;
2470         pos++; /* We'll set the size later below */
2471         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2472
2473         /* Fixed data */
2474         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2475         pos += sizeof(he_cap->he_cap_elem);
2476
2477         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2478         pos += n;
2479
2480         /* Check if PPE Threshold should be present */
2481         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2482              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2483                 goto end;
2484
2485         /*
2486          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2487          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2488          */
2489         n = hweight8(he_cap->ppe_thres[0] &
2490                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2491         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2492                    IEEE80211_PPE_THRES_NSS_POS));
2493
2494         /*
2495          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2496          * total size.
2497          */
2498         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2499         n = DIV_ROUND_UP(n, 8);
2500
2501         /* Copy PPE Thresholds */
2502         memcpy(pos, &he_cap->ppe_thres, n);
2503         pos += n;
2504
2505 end:
2506         orig_pos[1] = (pos - orig_pos) - 2;
2507         return pos;
2508 }
2509
2510 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2511                                const struct cfg80211_chan_def *chandef,
2512                                u16 prot_mode, bool rifs_mode)
2513 {
2514         struct ieee80211_ht_operation *ht_oper;
2515         /* Build HT Information */
2516         *pos++ = WLAN_EID_HT_OPERATION;
2517         *pos++ = sizeof(struct ieee80211_ht_operation);
2518         ht_oper = (struct ieee80211_ht_operation *)pos;
2519         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2520                                         chandef->chan->center_freq);
2521         switch (chandef->width) {
2522         case NL80211_CHAN_WIDTH_160:
2523         case NL80211_CHAN_WIDTH_80P80:
2524         case NL80211_CHAN_WIDTH_80:
2525         case NL80211_CHAN_WIDTH_40:
2526                 if (chandef->center_freq1 > chandef->chan->center_freq)
2527                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2528                 else
2529                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2530                 break;
2531         default:
2532                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2533                 break;
2534         }
2535         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2536             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2537             chandef->width != NL80211_CHAN_WIDTH_20)
2538                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2539
2540         if (rifs_mode)
2541                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2542
2543         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2544         ht_oper->stbc_param = 0x0000;
2545
2546         /* It seems that Basic MCS set and Supported MCS set
2547            are identical for the first 10 bytes */
2548         memset(&ht_oper->basic_set, 0, 16);
2549         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2550
2551         return pos + sizeof(struct ieee80211_ht_operation);
2552 }
2553
2554 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2555                                    const struct cfg80211_chan_def *chandef)
2556 {
2557         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2558         *pos++ = 3;                                     /* IE length */
2559         /* New channel width */
2560         switch (chandef->width) {
2561         case NL80211_CHAN_WIDTH_80:
2562                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2563                 break;
2564         case NL80211_CHAN_WIDTH_160:
2565                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2566                 break;
2567         case NL80211_CHAN_WIDTH_80P80:
2568                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2569                 break;
2570         default:
2571                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2572         }
2573
2574         /* new center frequency segment 0 */
2575         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2576         /* new center frequency segment 1 */
2577         if (chandef->center_freq2)
2578                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2579         else
2580                 *pos++ = 0;
2581 }
2582
2583 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2584                                 const struct cfg80211_chan_def *chandef)
2585 {
2586         struct ieee80211_vht_operation *vht_oper;
2587
2588         *pos++ = WLAN_EID_VHT_OPERATION;
2589         *pos++ = sizeof(struct ieee80211_vht_operation);
2590         vht_oper = (struct ieee80211_vht_operation *)pos;
2591         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2592                                                         chandef->center_freq1);
2593         if (chandef->center_freq2)
2594                 vht_oper->center_freq_seg1_idx =
2595                         ieee80211_frequency_to_channel(chandef->center_freq2);
2596         else
2597                 vht_oper->center_freq_seg1_idx = 0x00;
2598
2599         switch (chandef->width) {
2600         case NL80211_CHAN_WIDTH_160:
2601                 /*
2602                  * Convert 160 MHz channel width to new style as interop
2603                  * workaround.
2604                  */
2605                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2606                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2607                 if (chandef->chan->center_freq < chandef->center_freq1)
2608                         vht_oper->center_freq_seg0_idx -= 8;
2609                 else
2610                         vht_oper->center_freq_seg0_idx += 8;
2611                 break;
2612         case NL80211_CHAN_WIDTH_80P80:
2613                 /*
2614                  * Convert 80+80 MHz channel width to new style as interop
2615                  * workaround.
2616                  */
2617                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2618                 break;
2619         case NL80211_CHAN_WIDTH_80:
2620                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2621                 break;
2622         default:
2623                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2624                 break;
2625         }
2626
2627         /* don't require special VHT peer rates */
2628         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2629
2630         return pos + sizeof(struct ieee80211_vht_operation);
2631 }
2632
2633 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2634                                struct cfg80211_chan_def *chandef)
2635 {
2636         enum nl80211_channel_type channel_type;
2637
2638         if (!ht_oper)
2639                 return false;
2640
2641         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2642         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2643                 channel_type = NL80211_CHAN_HT20;
2644                 break;
2645         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2646                 channel_type = NL80211_CHAN_HT40PLUS;
2647                 break;
2648         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2649                 channel_type = NL80211_CHAN_HT40MINUS;
2650                 break;
2651         default:
2652                 channel_type = NL80211_CHAN_NO_HT;
2653                 return false;
2654         }
2655
2656         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2657         return true;
2658 }
2659
2660 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2661                                 struct cfg80211_chan_def *chandef)
2662 {
2663         struct cfg80211_chan_def new = *chandef;
2664         int cf1, cf2;
2665
2666         if (!oper)
2667                 return false;
2668
2669         cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2670                                              chandef->chan->band);
2671         cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2672                                              chandef->chan->band);
2673
2674         switch (oper->chan_width) {
2675         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2676                 break;
2677         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2678                 new.width = NL80211_CHAN_WIDTH_80;
2679                 new.center_freq1 = cf1;
2680                 /* If needed, adjust based on the newer interop workaround. */
2681                 if (oper->center_freq_seg1_idx) {
2682                         unsigned int diff;
2683
2684                         diff = abs(oper->center_freq_seg1_idx -
2685                                    oper->center_freq_seg0_idx);
2686                         if (diff == 8) {
2687                                 new.width = NL80211_CHAN_WIDTH_160;
2688                                 new.center_freq1 = cf2;
2689                         } else if (diff > 8) {
2690                                 new.width = NL80211_CHAN_WIDTH_80P80;
2691                                 new.center_freq2 = cf2;
2692                         }
2693                 }
2694                 break;
2695         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2696                 new.width = NL80211_CHAN_WIDTH_160;
2697                 new.center_freq1 = cf1;
2698                 break;
2699         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2700                 new.width = NL80211_CHAN_WIDTH_80P80;
2701                 new.center_freq1 = cf1;
2702                 new.center_freq2 = cf2;
2703                 break;
2704         default:
2705                 return false;
2706         }
2707
2708         if (!cfg80211_chandef_valid(&new))
2709                 return false;
2710
2711         *chandef = new;
2712         return true;
2713 }
2714
2715 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2716                              const struct ieee80211_supported_band *sband,
2717                              const u8 *srates, int srates_len, u32 *rates)
2718 {
2719         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2720         int shift = ieee80211_chandef_get_shift(chandef);
2721         struct ieee80211_rate *br;
2722         int brate, rate, i, j, count = 0;
2723
2724         *rates = 0;
2725
2726         for (i = 0; i < srates_len; i++) {
2727                 rate = srates[i] & 0x7f;
2728
2729                 for (j = 0; j < sband->n_bitrates; j++) {
2730                         br = &sband->bitrates[j];
2731                         if ((rate_flags & br->flags) != rate_flags)
2732                                 continue;
2733
2734                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2735                         if (brate == rate) {
2736                                 *rates |= BIT(j);
2737                                 count++;
2738                                 break;
2739                         }
2740                 }
2741         }
2742         return count;
2743 }
2744
2745 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2746                             struct sk_buff *skb, bool need_basic,
2747                             enum nl80211_band band)
2748 {
2749         struct ieee80211_local *local = sdata->local;
2750         struct ieee80211_supported_band *sband;
2751         int rate, shift;
2752         u8 i, rates, *pos;
2753         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2754         u32 rate_flags;
2755
2756         shift = ieee80211_vif_get_shift(&sdata->vif);
2757         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2758         sband = local->hw.wiphy->bands[band];
2759         rates = 0;
2760         for (i = 0; i < sband->n_bitrates; i++) {
2761                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2762                         continue;
2763                 rates++;
2764         }
2765         if (rates > 8)
2766                 rates = 8;
2767
2768         if (skb_tailroom(skb) < rates + 2)
2769                 return -ENOMEM;
2770
2771         pos = skb_put(skb, rates + 2);
2772         *pos++ = WLAN_EID_SUPP_RATES;
2773         *pos++ = rates;
2774         for (i = 0; i < rates; i++) {
2775                 u8 basic = 0;
2776                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2777                         continue;
2778
2779                 if (need_basic && basic_rates & BIT(i))
2780                         basic = 0x80;
2781                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2782                                     5 * (1 << shift));
2783                 *pos++ = basic | (u8) rate;
2784         }
2785
2786         return 0;
2787 }
2788
2789 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2790                                 struct sk_buff *skb, bool need_basic,
2791                                 enum nl80211_band band)
2792 {
2793         struct ieee80211_local *local = sdata->local;
2794         struct ieee80211_supported_band *sband;
2795         int rate, shift;
2796         u8 i, exrates, *pos;
2797         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2798         u32 rate_flags;
2799
2800         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2801         shift = ieee80211_vif_get_shift(&sdata->vif);
2802
2803         sband = local->hw.wiphy->bands[band];
2804         exrates = 0;
2805         for (i = 0; i < sband->n_bitrates; i++) {
2806                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2807                         continue;
2808                 exrates++;
2809         }
2810
2811         if (exrates > 8)
2812                 exrates -= 8;
2813         else
2814                 exrates = 0;
2815
2816         if (skb_tailroom(skb) < exrates + 2)
2817                 return -ENOMEM;
2818
2819         if (exrates) {
2820                 pos = skb_put(skb, exrates + 2);
2821                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2822                 *pos++ = exrates;
2823                 for (i = 8; i < sband->n_bitrates; i++) {
2824                         u8 basic = 0;
2825                         if ((rate_flags & sband->bitrates[i].flags)
2826                             != rate_flags)
2827                                 continue;
2828                         if (need_basic && basic_rates & BIT(i))
2829                                 basic = 0x80;
2830                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2831                                             5 * (1 << shift));
2832                         *pos++ = basic | (u8) rate;
2833                 }
2834         }
2835         return 0;
2836 }
2837
2838 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2839 {
2840         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2841         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2842
2843         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2844                 /* non-managed type inferfaces */
2845                 return 0;
2846         }
2847         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2848 }
2849 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2850
2851 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2852 {
2853         if (!mcs)
2854                 return 1;
2855
2856         /* TODO: consider rx_highest */
2857
2858         if (mcs->rx_mask[3])
2859                 return 4;
2860         if (mcs->rx_mask[2])
2861                 return 3;
2862         if (mcs->rx_mask[1])
2863                 return 2;
2864         return 1;
2865 }
2866
2867 /**
2868  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2869  * @local: mac80211 hw info struct
2870  * @status: RX status
2871  * @mpdu_len: total MPDU length (including FCS)
2872  * @mpdu_offset: offset into MPDU to calculate timestamp at
2873  *
2874  * This function calculates the RX timestamp at the given MPDU offset, taking
2875  * into account what the RX timestamp was. An offset of 0 will just normalize
2876  * the timestamp to TSF at beginning of MPDU reception.
2877  */
2878 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2879                                      struct ieee80211_rx_status *status,
2880                                      unsigned int mpdu_len,
2881                                      unsigned int mpdu_offset)
2882 {
2883         u64 ts = status->mactime;
2884         struct rate_info ri;
2885         u16 rate;
2886
2887         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2888                 return 0;
2889
2890         memset(&ri, 0, sizeof(ri));
2891
2892         ri.bw = status->bw;
2893
2894         /* Fill cfg80211 rate info */
2895         switch (status->encoding) {
2896         case RX_ENC_HT:
2897                 ri.mcs = status->rate_idx;
2898                 ri.flags |= RATE_INFO_FLAGS_MCS;
2899                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2900                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2901                 break;
2902         case RX_ENC_VHT:
2903                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2904                 ri.mcs = status->rate_idx;
2905                 ri.nss = status->nss;
2906                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2907                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2908                 break;
2909         default:
2910                 WARN_ON(1);
2911                 /* fall through */
2912         case RX_ENC_LEGACY: {
2913                 struct ieee80211_supported_band *sband;
2914                 int shift = 0;
2915                 int bitrate;
2916
2917                 switch (status->bw) {
2918                 case RATE_INFO_BW_10:
2919                         shift = 1;
2920                         break;
2921                 case RATE_INFO_BW_5:
2922                         shift = 2;
2923                         break;
2924                 }
2925
2926                 sband = local->hw.wiphy->bands[status->band];
2927                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2928                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2929
2930                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2931                         /* TODO: handle HT/VHT preambles */
2932                         if (status->band == NL80211_BAND_5GHZ) {
2933                                 ts += 20 << shift;
2934                                 mpdu_offset += 2;
2935                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2936                                 ts += 96;
2937                         } else {
2938                                 ts += 192;
2939                         }
2940                 }
2941                 break;
2942                 }
2943         }
2944
2945         rate = cfg80211_calculate_bitrate(&ri);
2946         if (WARN_ONCE(!rate,
2947                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2948                       (unsigned long long)status->flag, status->rate_idx,
2949                       status->nss))
2950                 return 0;
2951
2952         /* rewind from end of MPDU */
2953         if (status->flag & RX_FLAG_MACTIME_END)
2954                 ts -= mpdu_len * 8 * 10 / rate;
2955
2956         ts += mpdu_offset * 8 * 10 / rate;
2957
2958         return ts;
2959 }
2960
2961 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2962 {
2963         struct ieee80211_sub_if_data *sdata;
2964         struct cfg80211_chan_def chandef;
2965
2966         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2967         ASSERT_RTNL();
2968
2969         mutex_lock(&local->mtx);
2970         list_for_each_entry(sdata, &local->interfaces, list) {
2971                 /* it might be waiting for the local->mtx, but then
2972                  * by the time it gets it, sdata->wdev.cac_started
2973                  * will no longer be true
2974                  */
2975                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2976
2977                 if (sdata->wdev.cac_started) {
2978                         chandef = sdata->vif.bss_conf.chandef;
2979                         ieee80211_vif_release_channel(sdata);
2980                         cfg80211_cac_event(sdata->dev,
2981                                            &chandef,
2982                                            NL80211_RADAR_CAC_ABORTED,
2983                                            GFP_KERNEL);
2984                 }
2985         }
2986         mutex_unlock(&local->mtx);
2987 }
2988
2989 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2990 {
2991         struct ieee80211_local *local =
2992                 container_of(work, struct ieee80211_local, radar_detected_work);
2993         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2994         struct ieee80211_chanctx *ctx;
2995         int num_chanctx = 0;
2996
2997         mutex_lock(&local->chanctx_mtx);
2998         list_for_each_entry(ctx, &local->chanctx_list, list) {
2999                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3000                         continue;
3001
3002                 num_chanctx++;
3003                 chandef = ctx->conf.def;
3004         }
3005         mutex_unlock(&local->chanctx_mtx);
3006
3007         rtnl_lock();
3008         ieee80211_dfs_cac_cancel(local);
3009         rtnl_unlock();
3010
3011         if (num_chanctx > 1)
3012                 /* XXX: multi-channel is not supported yet */
3013                 WARN_ON(1);
3014         else
3015                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3016 }
3017
3018 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3019 {
3020         struct ieee80211_local *local = hw_to_local(hw);
3021
3022         trace_api_radar_detected(local);
3023
3024         schedule_work(&local->radar_detected_work);
3025 }
3026 EXPORT_SYMBOL(ieee80211_radar_detected);
3027
3028 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3029 {
3030         u32 ret;
3031         int tmp;
3032
3033         switch (c->width) {
3034         case NL80211_CHAN_WIDTH_20:
3035                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3036                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3037                 break;
3038         case NL80211_CHAN_WIDTH_40:
3039                 c->width = NL80211_CHAN_WIDTH_20;
3040                 c->center_freq1 = c->chan->center_freq;
3041                 ret = IEEE80211_STA_DISABLE_40MHZ |
3042                       IEEE80211_STA_DISABLE_VHT;
3043                 break;
3044         case NL80211_CHAN_WIDTH_80:
3045                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3046                 /* n_P40 */
3047                 tmp /= 2;
3048                 /* freq_P40 */
3049                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3050                 c->width = NL80211_CHAN_WIDTH_40;
3051                 ret = IEEE80211_STA_DISABLE_VHT;
3052                 break;
3053         case NL80211_CHAN_WIDTH_80P80:
3054                 c->center_freq2 = 0;
3055                 c->width = NL80211_CHAN_WIDTH_80;
3056                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3057                       IEEE80211_STA_DISABLE_160MHZ;
3058                 break;
3059         case NL80211_CHAN_WIDTH_160:
3060                 /* n_P20 */
3061                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3062                 /* n_P80 */
3063                 tmp /= 4;
3064                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3065                 c->width = NL80211_CHAN_WIDTH_80;
3066                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3067                       IEEE80211_STA_DISABLE_160MHZ;
3068                 break;
3069         default:
3070         case NL80211_CHAN_WIDTH_20_NOHT:
3071                 WARN_ON_ONCE(1);
3072                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3073                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3074                 break;
3075         case NL80211_CHAN_WIDTH_5:
3076         case NL80211_CHAN_WIDTH_10:
3077                 WARN_ON_ONCE(1);
3078                 /* keep c->width */
3079                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3080                 break;
3081         }
3082
3083         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3084
3085         return ret;
3086 }
3087
3088 /*
3089  * Returns true if smps_mode_new is strictly more restrictive than
3090  * smps_mode_old.
3091  */
3092 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3093                                    enum ieee80211_smps_mode smps_mode_new)
3094 {
3095         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3096                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3097                 return false;
3098
3099         switch (smps_mode_old) {
3100         case IEEE80211_SMPS_STATIC:
3101                 return false;
3102         case IEEE80211_SMPS_DYNAMIC:
3103                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3104         case IEEE80211_SMPS_OFF:
3105                 return smps_mode_new != IEEE80211_SMPS_OFF;
3106         default:
3107                 WARN_ON(1);
3108         }
3109
3110         return false;
3111 }
3112
3113 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3114                               struct cfg80211_csa_settings *csa_settings)
3115 {
3116         struct sk_buff *skb;
3117         struct ieee80211_mgmt *mgmt;
3118         struct ieee80211_local *local = sdata->local;
3119         int freq;
3120         int hdr_len = offsetofend(struct ieee80211_mgmt,
3121                                   u.action.u.chan_switch);
3122         u8 *pos;
3123
3124         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3125             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3126                 return -EOPNOTSUPP;
3127
3128         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3129                             5 + /* channel switch announcement element */
3130                             3 + /* secondary channel offset element */
3131                             5 + /* wide bandwidth channel switch announcement */
3132                             8); /* mesh channel switch parameters element */
3133         if (!skb)
3134                 return -ENOMEM;
3135
3136         skb_reserve(skb, local->tx_headroom);
3137         mgmt = skb_put_zero(skb, hdr_len);
3138         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3139                                           IEEE80211_STYPE_ACTION);
3140
3141         eth_broadcast_addr(mgmt->da);
3142         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3143         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3144                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3145         } else {
3146                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3147                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3148         }
3149         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3150         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3151         pos = skb_put(skb, 5);
3152         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3153         *pos++ = 3;                                             /* IE length */
3154         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3155         freq = csa_settings->chandef.chan->center_freq;
3156         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3157         *pos++ = csa_settings->count;                           /* count */
3158
3159         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3160                 enum nl80211_channel_type ch_type;
3161
3162                 skb_put(skb, 3);
3163                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3164                 *pos++ = 1;                                     /* IE length */
3165                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3166                 if (ch_type == NL80211_CHAN_HT40PLUS)
3167                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3168                 else
3169                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3170         }
3171
3172         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3173                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3174
3175                 skb_put(skb, 8);
3176                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3177                 *pos++ = 6;                                     /* IE length */
3178                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3179                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3180                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3181                 *pos++ |= csa_settings->block_tx ?
3182                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3183                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3184                 pos += 2;
3185                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3186                 pos += 2;
3187         }
3188
3189         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3190             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3191             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3192                 skb_put(skb, 5);
3193                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3194         }
3195
3196         ieee80211_tx_skb(sdata, skb);
3197         return 0;
3198 }
3199
3200 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3201 {
3202         return !(cs == NULL || cs->cipher == 0 ||
3203                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3204                  cs->hdr_len <= cs->key_idx_off ||
3205                  cs->key_idx_shift > 7 ||
3206                  cs->key_idx_mask == 0);
3207 }
3208
3209 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3210 {
3211         int i;
3212
3213         /* Ensure we have enough iftype bitmap space for all iftype values */
3214         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3215
3216         for (i = 0; i < n; i++)
3217                 if (!ieee80211_cs_valid(&cs[i]))
3218                         return false;
3219
3220         return true;
3221 }
3222
3223 const struct ieee80211_cipher_scheme *
3224 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3225                  enum nl80211_iftype iftype)
3226 {
3227         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3228         int n = local->hw.n_cipher_schemes;
3229         int i;
3230         const struct ieee80211_cipher_scheme *cs = NULL;
3231
3232         for (i = 0; i < n; i++) {
3233                 if (l[i].cipher == cipher) {
3234                         cs = &l[i];
3235                         break;
3236                 }
3237         }
3238
3239         if (!cs || !(cs->iftype & BIT(iftype)))
3240                 return NULL;
3241
3242         return cs;
3243 }
3244
3245 int ieee80211_cs_headroom(struct ieee80211_local *local,
3246                           struct cfg80211_crypto_settings *crypto,
3247                           enum nl80211_iftype iftype)
3248 {
3249         const struct ieee80211_cipher_scheme *cs;
3250         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3251         int i;
3252
3253         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3254                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3255                                       iftype);
3256
3257                 if (cs && headroom < cs->hdr_len)
3258                         headroom = cs->hdr_len;
3259         }
3260
3261         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3262         if (cs && headroom < cs->hdr_len)
3263                 headroom = cs->hdr_len;
3264
3265         return headroom;
3266 }
3267
3268 static bool
3269 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3270 {
3271         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3272         int skip;
3273
3274         if (end > 0)
3275                 return false;
3276
3277         /* One shot NOA  */
3278         if (data->count[i] == 1)
3279                 return false;
3280
3281         if (data->desc[i].interval == 0)
3282                 return false;
3283
3284         /* End time is in the past, check for repetitions */
3285         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3286         if (data->count[i] < 255) {
3287                 if (data->count[i] <= skip) {
3288                         data->count[i] = 0;
3289                         return false;
3290                 }
3291
3292                 data->count[i] -= skip;
3293         }
3294
3295         data->desc[i].start += skip * data->desc[i].interval;
3296
3297         return true;
3298 }
3299
3300 static bool
3301 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3302                              s32 *offset)
3303 {
3304         bool ret = false;
3305         int i;
3306
3307         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3308                 s32 cur;
3309
3310                 if (!data->count[i])
3311                         continue;
3312
3313                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3314                         ret = true;
3315
3316                 cur = data->desc[i].start - tsf;
3317                 if (cur > *offset)
3318                         continue;
3319
3320                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3321                 if (cur > *offset)
3322                         *offset = cur;
3323         }
3324
3325         return ret;
3326 }
3327
3328 static u32
3329 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3330 {
3331         s32 offset = 0;
3332         int tries = 0;
3333         /*
3334          * arbitrary limit, used to avoid infinite loops when combined NoA
3335          * descriptors cover the full time period.
3336          */
3337         int max_tries = 5;
3338
3339         ieee80211_extend_absent_time(data, tsf, &offset);
3340         do {
3341                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3342                         break;
3343
3344                 tries++;
3345         } while (tries < max_tries);
3346
3347         return offset;
3348 }
3349
3350 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3351 {
3352         u32 next_offset = BIT(31) - 1;
3353         int i;
3354
3355         data->absent = 0;
3356         data->has_next_tsf = false;
3357         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3358                 s32 start;
3359
3360                 if (!data->count[i])
3361                         continue;
3362
3363                 ieee80211_extend_noa_desc(data, tsf, i);
3364                 start = data->desc[i].start - tsf;
3365                 if (start <= 0)
3366                         data->absent |= BIT(i);
3367
3368                 if (next_offset > start)
3369                         next_offset = start;
3370
3371                 data->has_next_tsf = true;
3372         }
3373
3374         if (data->absent)
3375                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3376
3377         data->next_tsf = tsf + next_offset;
3378 }
3379 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3380
3381 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3382                             struct ieee80211_noa_data *data, u32 tsf)
3383 {
3384         int ret = 0;
3385         int i;
3386
3387         memset(data, 0, sizeof(*data));
3388
3389         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3390                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3391
3392                 if (!desc->count || !desc->duration)
3393                         continue;
3394
3395                 data->count[i] = desc->count;
3396                 data->desc[i].start = le32_to_cpu(desc->start_time);
3397                 data->desc[i].duration = le32_to_cpu(desc->duration);
3398                 data->desc[i].interval = le32_to_cpu(desc->interval);
3399
3400                 if (data->count[i] > 1 &&
3401                     data->desc[i].interval < data->desc[i].duration)
3402                         continue;
3403
3404                 ieee80211_extend_noa_desc(data, tsf, i);
3405                 ret++;
3406         }
3407
3408         if (ret)
3409                 ieee80211_update_p2p_noa(data, tsf);
3410
3411         return ret;
3412 }
3413 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3414
3415 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3416                            struct ieee80211_sub_if_data *sdata)
3417 {
3418         u64 tsf = drv_get_tsf(local, sdata);
3419         u64 dtim_count = 0;
3420         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3421         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3422         struct ps_data *ps;
3423         u8 bcns_from_dtim;
3424
3425         if (tsf == -1ULL || !beacon_int || !dtim_period)
3426                 return;
3427
3428         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3429             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3430                 if (!sdata->bss)
3431                         return;
3432
3433                 ps = &sdata->bss->ps;
3434         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3435                 ps = &sdata->u.mesh.ps;
3436         } else {
3437                 return;
3438         }
3439
3440         /*
3441          * actually finds last dtim_count, mac80211 will update in
3442          * __beacon_add_tim().
3443          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3444          */
3445         do_div(tsf, beacon_int);
3446         bcns_from_dtim = do_div(tsf, dtim_period);
3447         /* just had a DTIM */
3448         if (!bcns_from_dtim)
3449                 dtim_count = 0;
3450         else
3451                 dtim_count = dtim_period - bcns_from_dtim;
3452
3453         ps->dtim_count = dtim_count;
3454 }
3455
3456 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3457                                          struct ieee80211_chanctx *ctx)
3458 {
3459         struct ieee80211_sub_if_data *sdata;
3460         u8 radar_detect = 0;
3461
3462         lockdep_assert_held(&local->chanctx_mtx);
3463
3464         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3465                 return 0;
3466
3467         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3468                 if (sdata->reserved_radar_required)
3469                         radar_detect |= BIT(sdata->reserved_chandef.width);
3470
3471         /*
3472          * An in-place reservation context should not have any assigned vifs
3473          * until it replaces the other context.
3474          */
3475         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3476                 !list_empty(&ctx->assigned_vifs));
3477
3478         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3479                 if (sdata->radar_required)
3480                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3481
3482         return radar_detect;
3483 }
3484
3485 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3486                                  const struct cfg80211_chan_def *chandef,
3487                                  enum ieee80211_chanctx_mode chanmode,
3488                                  u8 radar_detect)
3489 {
3490         struct ieee80211_local *local = sdata->local;
3491         struct ieee80211_sub_if_data *sdata_iter;
3492         enum nl80211_iftype iftype = sdata->wdev.iftype;
3493         struct ieee80211_chanctx *ctx;
3494         int total = 1;
3495         struct iface_combination_params params = {
3496                 .radar_detect = radar_detect,
3497         };
3498
3499         lockdep_assert_held(&local->chanctx_mtx);
3500
3501         if (WARN_ON(hweight32(radar_detect) > 1))
3502                 return -EINVAL;
3503
3504         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3505                     !chandef->chan))
3506                 return -EINVAL;
3507
3508         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3509                 return -EINVAL;
3510
3511         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3512             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3513                 /*
3514                  * always passing this is harmless, since it'll be the
3515                  * same value that cfg80211 finds if it finds the same
3516                  * interface ... and that's always allowed
3517                  */
3518                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3519         }
3520
3521         /* Always allow software iftypes */
3522         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3523                 if (radar_detect)
3524                         return -EINVAL;
3525                 return 0;
3526         }
3527
3528         if (chandef)
3529                 params.num_different_channels = 1;
3530
3531         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3532                 params.iftype_num[iftype] = 1;
3533
3534         list_for_each_entry(ctx, &local->chanctx_list, list) {
3535                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3536                         continue;
3537                 params.radar_detect |=
3538                         ieee80211_chanctx_radar_detect(local, ctx);
3539                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3540                         params.num_different_channels++;
3541                         continue;
3542                 }
3543                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3544                     cfg80211_chandef_compatible(chandef,
3545                                                 &ctx->conf.def))
3546                         continue;
3547                 params.num_different_channels++;
3548         }
3549
3550         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3551                 struct wireless_dev *wdev_iter;
3552
3553                 wdev_iter = &sdata_iter->wdev;
3554
3555                 if (sdata_iter == sdata ||
3556                     !ieee80211_sdata_running(sdata_iter) ||
3557                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3558                         continue;
3559
3560                 params.iftype_num[wdev_iter->iftype]++;
3561                 total++;
3562         }
3563
3564         if (total == 1 && !params.radar_detect)
3565                 return 0;
3566
3567         return cfg80211_check_combinations(local->hw.wiphy, &params);
3568 }
3569
3570 static void
3571 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3572                          void *data)
3573 {
3574         u32 *max_num_different_channels = data;
3575
3576         *max_num_different_channels = max(*max_num_different_channels,
3577                                           c->num_different_channels);
3578 }
3579
3580 int ieee80211_max_num_channels(struct ieee80211_local *local)
3581 {
3582         struct ieee80211_sub_if_data *sdata;
3583         struct ieee80211_chanctx *ctx;
3584         u32 max_num_different_channels = 1;
3585         int err;
3586         struct iface_combination_params params = {0};
3587
3588         lockdep_assert_held(&local->chanctx_mtx);
3589
3590         list_for_each_entry(ctx, &local->chanctx_list, list) {
3591                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3592                         continue;
3593
3594                 params.num_different_channels++;
3595
3596                 params.radar_detect |=
3597                         ieee80211_chanctx_radar_detect(local, ctx);
3598         }
3599
3600         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3601                 params.iftype_num[sdata->wdev.iftype]++;
3602
3603         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3604                                          ieee80211_iter_max_chans,
3605                                          &max_num_different_channels);
3606         if (err < 0)
3607                 return err;
3608
3609         return max_num_different_channels;
3610 }
3611
3612 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3613 {
3614         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3615         *buf++ = 7; /* len */
3616         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3617         *buf++ = 0x50;
3618         *buf++ = 0xf2;
3619         *buf++ = 2; /* WME */
3620         *buf++ = 0; /* WME info */
3621         *buf++ = 1; /* WME ver */
3622         *buf++ = qosinfo; /* U-APSD no in use */
3623
3624         return buf;
3625 }
3626
3627 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3628                              unsigned long *frame_cnt,
3629                              unsigned long *byte_cnt)
3630 {
3631         struct txq_info *txqi = to_txq_info(txq);
3632         u32 frag_cnt = 0, frag_bytes = 0;
3633         struct sk_buff *skb;
3634
3635         skb_queue_walk(&txqi->frags, skb) {
3636                 frag_cnt++;
3637                 frag_bytes += skb->len;
3638         }
3639
3640         if (frame_cnt)
3641                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3642
3643         if (byte_cnt)
3644                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3645 }
3646 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3647
3648 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3649         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3650         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3651         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3652         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3653 };