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) 2018-2019 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                                 if (calc_crc)
 951                                         crc = crc32_be(crc, pos - 2, elen + 2);
 952                                 break;
 953                         }
 954                         elem_parse_failed = true;
 955                         break;
 956                 case WLAN_EID_OPMODE_NOTIF:
 957                         if (elen > 0) {
 958                                 elems->opmode_notif = pos;
 959                                 if (calc_crc)
 960                                         crc = crc32_be(crc, pos - 2, elen + 2);
 961                                 break;
 962                         }
 963                         elem_parse_failed = true;
 964                         break;
 965                 case WLAN_EID_MESH_ID:
 966                         elems->mesh_id = pos;
 967                         elems->mesh_id_len = elen;
 968                         break;
 969                 case WLAN_EID_MESH_CONFIG:
 970                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 971                                 elems->mesh_config = (void *)pos;
 972                         else
 973                                 elem_parse_failed = true;
 974                         break;
 975                 case WLAN_EID_PEER_MGMT:
 976                         elems->peering = pos;
 977                         elems->peering_len = elen;
 978                         break;
 979                 case WLAN_EID_MESH_AWAKE_WINDOW:
 980                         if (elen >= 2)
 981                                 elems->awake_window = (void *)pos;
 982                         break;
 983                 case WLAN_EID_PREQ:
 984                         elems->preq = pos;
 985                         elems->preq_len = elen;
 986                         break;
 987                 case WLAN_EID_PREP:
 988                         elems->prep = pos;
 989                         elems->prep_len = elen;
 990                         break;
 991                 case WLAN_EID_PERR:
 992                         elems->perr = pos;
 993                         elems->perr_len = elen;
 994                         break;
 995                 case WLAN_EID_RANN:
 996                         if (elen >= sizeof(struct ieee80211_rann_ie))
 997                                 elems->rann = (void *)pos;
 998                         else
 999                                 elem_parse_failed = true;
1000                         break;
1001                 case WLAN_EID_CHANNEL_SWITCH:
1002                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1003                                 elem_parse_failed = true;
1004                                 break;
1005                         }
1006                         elems->ch_switch_ie = (void *)pos;
1007                         break;
1008                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1009                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1010                                 elem_parse_failed = true;
1011                                 break;
1012                         }
1013                         elems->ext_chansw_ie = (void *)pos;
1014                         break;
1015                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1016                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1017                                 elem_parse_failed = true;
1018                                 break;
1019                         }
1020                         elems->sec_chan_offs = (void *)pos;
1021                         break;
1022                 case WLAN_EID_CHAN_SWITCH_PARAM:
1023                         if (elen !=
1024                             sizeof(*elems->mesh_chansw_params_ie)) {
1025                                 elem_parse_failed = true;
1026                                 break;
1027                         }
1028                         elems->mesh_chansw_params_ie = (void *)pos;
1029                         break;
1030                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1031                         if (!action ||
1032                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1033                                 elem_parse_failed = true;
1034                                 break;
1035                         }
1036                         elems->wide_bw_chansw_ie = (void *)pos;
1037                         break;
1038                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1039                         if (action) {
1040                                 elem_parse_failed = true;
1041                                 break;
1042                         }
1043                         /*
1044                          * This is a bit tricky, but as we only care about
1045                          * the wide bandwidth channel switch element, so
1046                          * just parse it out manually.
1047                          */
1048                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1049                                               pos, elen);
1050                         if (ie) {
1051                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1052                                         elems->wide_bw_chansw_ie =
1053                                                 (void *)(ie + 2);
1054                                 else
1055                                         elem_parse_failed = true;
1056                         }
1057                         break;
1058                 case WLAN_EID_COUNTRY:
1059                         elems->country_elem = pos;
1060                         elems->country_elem_len = elen;
1061                         break;
1062                 case WLAN_EID_PWR_CONSTRAINT:
1063                         if (elen != 1) {
1064                                 elem_parse_failed = true;
1065                                 break;
1066                         }
1067                         elems->pwr_constr_elem = pos;
1068                         break;
1069                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1070                         /* Lots of different options exist, but we only care
1071                          * about the Dynamic Transmit Power Control element.
1072                          * First check for the Cisco OUI, then for the DTPC
1073                          * tag (0x00).
1074                          */
1075                         if (elen < 4) {
1076                                 elem_parse_failed = true;
1077                                 break;
1078                         }
1079
1080                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1081                             pos[2] != 0x96 || pos[3] != 0x00)
1082                                 break;
1083
1084                         if (elen != 6) {
1085                                 elem_parse_failed = true;
1086                                 break;
1087                         }
1088
1089                         if (calc_crc)
1090                                 crc = crc32_be(crc, pos - 2, elen + 2);
1091
1092                         elems->cisco_dtpc_elem = pos;
1093                         break;
1094                 case WLAN_EID_TIMEOUT_INTERVAL:
1095                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1096                                 elems->timeout_int = (void *)pos;
1097                         else
1098                                 elem_parse_failed = true;
1099                         break;
1100                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1101                         if (elen >= sizeof(*elems->max_idle_period_ie))
1102                                 elems->max_idle_period_ie = (void *)pos;
1103                         break;
1104                 case WLAN_EID_EXTENSION:
1105                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1106                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1107                                 elems->mu_edca_param_set = (void *)&pos[1];
1108                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1109                                 elems->he_cap = (void *)&pos[1];
1110                                 elems->he_cap_len = elen - 1;
1111                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1112                                    elen >= sizeof(*elems->he_operation) &&
1113                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1114                                 elems->he_operation = (void *)&pos[1];
1115                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1116                                 elems->uora_element = (void *)&pos[1];
1117                         }
1118                         break;
1119                 default:
1120                         break;
1121                 }
1122
1123                 if (elem_parse_failed)
1124                         elems->parse_error = true;
1125                 else
1126                         __set_bit(id, seen_elems);
1127
1128                 left -= elen;
1129                 pos += elen;
1130         }
1131
1132         if (left != 0)
1133                 elems->parse_error = true;
1134
1135         return crc;
1136 }
1137
1138 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1139                                            struct ieee80211_tx_queue_params
1140                                            *qparam, int ac)
1141 {
1142         struct ieee80211_chanctx_conf *chanctx_conf;
1143         const struct ieee80211_reg_rule *rrule;
1144         const struct ieee80211_wmm_ac *wmm_ac;
1145         u16 center_freq = 0;
1146
1147         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1148             sdata->vif.type != NL80211_IFTYPE_STATION)
1149                 return;
1150
1151         rcu_read_lock();
1152         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1153         if (chanctx_conf)
1154                 center_freq = chanctx_conf->def.chan->center_freq;
1155
1156         if (!center_freq) {
1157                 rcu_read_unlock();
1158                 return;
1159         }
1160
1161         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1162
1163         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1164                 rcu_read_unlock();
1165                 return;
1166         }
1167
1168         if (sdata->vif.type == NL80211_IFTYPE_AP)
1169                 wmm_ac = &rrule->wmm_rule.ap[ac];
1170         else
1171                 wmm_ac = &rrule->wmm_rule.client[ac];
1172         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1173         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1174         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1175         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1176         rcu_read_unlock();
1177 }
1178
1179 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1180                                bool bss_notify, bool enable_qos)
1181 {
1182         struct ieee80211_local *local = sdata->local;
1183         struct ieee80211_tx_queue_params qparam;
1184         struct ieee80211_chanctx_conf *chanctx_conf;
1185         int ac;
1186         bool use_11b;
1187         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1188         int aCWmin, aCWmax;
1189
1190         if (!local->ops->conf_tx)
1191                 return;
1192
1193         if (local->hw.queues < IEEE80211_NUM_ACS)
1194                 return;
1195
1196         memset(&qparam, 0, sizeof(qparam));
1197
1198         rcu_read_lock();
1199         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1200         use_11b = (chanctx_conf &&
1201                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1202                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1203         rcu_read_unlock();
1204
1205         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1206
1207         /* Set defaults according to 802.11-2007 Table 7-37 */
1208         aCWmax = 1023;
1209         if (use_11b)
1210                 aCWmin = 31;
1211         else
1212                 aCWmin = 15;
1213
1214         /* Confiure old 802.11b/g medium access rules. */
1215         qparam.cw_max = aCWmax;
1216         qparam.cw_min = aCWmin;
1217         qparam.txop = 0;
1218         qparam.aifs = 2;
1219
1220         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1221                 /* Update if QoS is enabled. */
1222                 if (enable_qos) {
1223                         switch (ac) {
1224                         case IEEE80211_AC_BK:
1225                                 qparam.cw_max = aCWmax;
1226                                 qparam.cw_min = aCWmin;
1227                                 qparam.txop = 0;
1228                                 if (is_ocb)
1229                                         qparam.aifs = 9;
1230                                 else
1231                                         qparam.aifs = 7;
1232                                 break;
1233                         /* never happens but let's not leave undefined */
1234                         default:
1235                         case IEEE80211_AC_BE:
1236                                 qparam.cw_max = aCWmax;
1237                                 qparam.cw_min = aCWmin;
1238                                 qparam.txop = 0;
1239                                 if (is_ocb)
1240                                         qparam.aifs = 6;
1241                                 else
1242                                         qparam.aifs = 3;
1243                                 break;
1244                         case IEEE80211_AC_VI:
1245                                 qparam.cw_max = aCWmin;
1246                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1247                                 if (is_ocb)
1248                                         qparam.txop = 0;
1249                                 else if (use_11b)
1250                                         qparam.txop = 6016/32;
1251                                 else
1252                                         qparam.txop = 3008/32;
1253
1254                                 if (is_ocb)
1255                                         qparam.aifs = 3;
1256                                 else
1257                                         qparam.aifs = 2;
1258                                 break;
1259                         case IEEE80211_AC_VO:
1260                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1261                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1262                                 if (is_ocb)
1263                                         qparam.txop = 0;
1264                                 else if (use_11b)
1265                                         qparam.txop = 3264/32;
1266                                 else
1267                                         qparam.txop = 1504/32;
1268                                 qparam.aifs = 2;
1269                                 break;
1270                         }
1271                 }
1272                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1273
1274                 qparam.uapsd = false;
1275
1276                 sdata->tx_conf[ac] = qparam;
1277                 drv_conf_tx(local, sdata, ac, &qparam);
1278         }
1279
1280         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1281             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1282             sdata->vif.type != NL80211_IFTYPE_NAN) {
1283                 sdata->vif.bss_conf.qos = enable_qos;
1284                 if (bss_notify)
1285                         ieee80211_bss_info_change_notify(sdata,
1286                                                          BSS_CHANGED_QOS);
1287         }
1288 }
1289
1290 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1291                          u16 transaction, u16 auth_alg, u16 status,
1292                          const u8 *extra, size_t extra_len, const u8 *da,
1293                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1294                          u32 tx_flags)
1295 {
1296         struct ieee80211_local *local = sdata->local;
1297         struct sk_buff *skb;
1298         struct ieee80211_mgmt *mgmt;
1299         int err;
1300
1301         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1302         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1303                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1304         if (!skb)
1305                 return;
1306
1307         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1308
1309         mgmt = skb_put_zero(skb, 24 + 6);
1310         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1311                                           IEEE80211_STYPE_AUTH);
1312         memcpy(mgmt->da, da, ETH_ALEN);
1313         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1314         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1315         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1316         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1317         mgmt->u.auth.status_code = cpu_to_le16(status);
1318         if (extra)
1319                 skb_put_data(skb, extra, extra_len);
1320
1321         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1322                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1323                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1324                 WARN_ON(err);
1325         }
1326
1327         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1328                                         tx_flags;
1329         ieee80211_tx_skb(sdata, skb);
1330 }
1331
1332 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1333                                     const u8 *bssid, u16 stype, u16 reason,
1334                                     bool send_frame, u8 *frame_buf)
1335 {
1336         struct ieee80211_local *local = sdata->local;
1337         struct sk_buff *skb;
1338         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1339
1340         /* build frame */
1341         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1342         mgmt->duration = 0; /* initialize only */
1343         mgmt->seq_ctrl = 0; /* initialize only */
1344         memcpy(mgmt->da, bssid, ETH_ALEN);
1345         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1346         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1347         /* u.deauth.reason_code == u.disassoc.reason_code */
1348         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1349
1350         if (send_frame) {
1351                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1352                                     IEEE80211_DEAUTH_FRAME_LEN);
1353                 if (!skb)
1354                         return;
1355
1356                 skb_reserve(skb, local->hw.extra_tx_headroom);
1357
1358                 /* copy in frame */
1359                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1360
1361                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1362                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1363                         IEEE80211_SKB_CB(skb)->flags |=
1364                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1365
1366                 ieee80211_tx_skb(sdata, skb);
1367         }
1368 }
1369
1370 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1371                                          u8 *buffer, size_t buffer_len,
1372                                          const u8 *ie, size_t ie_len,
1373                                          enum nl80211_band band,
1374                                          u32 rate_mask,
1375                                          struct cfg80211_chan_def *chandef,
1376                                          size_t *offset, u32 flags)
1377 {
1378         struct ieee80211_supported_band *sband;
1379         const struct ieee80211_sta_he_cap *he_cap;
1380         u8 *pos = buffer, *end = buffer + buffer_len;
1381         size_t noffset;
1382         int supp_rates_len, i;
1383         u8 rates[32];
1384         int num_rates;
1385         int ext_rates_len;
1386         int shift;
1387         u32 rate_flags;
1388         bool have_80mhz = false;
1389
1390         *offset = 0;
1391
1392         sband = local->hw.wiphy->bands[band];
1393         if (WARN_ON_ONCE(!sband))
1394                 return 0;
1395
1396         rate_flags = ieee80211_chandef_rate_flags(chandef);
1397         shift = ieee80211_chandef_get_shift(chandef);
1398
1399         num_rates = 0;
1400         for (i = 0; i < sband->n_bitrates; i++) {
1401                 if ((BIT(i) & rate_mask) == 0)
1402                         continue; /* skip rate */
1403                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1404                         continue;
1405
1406                 rates[num_rates++] =
1407                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1408                                           (1 << shift) * 5);
1409         }
1410
1411         supp_rates_len = min_t(int, num_rates, 8);
1412
1413         if (end - pos < 2 + supp_rates_len)
1414                 goto out_err;
1415         *pos++ = WLAN_EID_SUPP_RATES;
1416         *pos++ = supp_rates_len;
1417         memcpy(pos, rates, supp_rates_len);
1418         pos += supp_rates_len;
1419
1420         /* insert "request information" if in custom IEs */
1421         if (ie && ie_len) {
1422                 static const u8 before_extrates[] = {
1423                         WLAN_EID_SSID,
1424                         WLAN_EID_SUPP_RATES,
1425                         WLAN_EID_REQUEST,
1426                 };
1427                 noffset = ieee80211_ie_split(ie, ie_len,
1428                                              before_extrates,
1429                                              ARRAY_SIZE(before_extrates),
1430                                              *offset);
1431                 if (end - pos < noffset - *offset)
1432                         goto out_err;
1433                 memcpy(pos, ie + *offset, noffset - *offset);
1434                 pos += noffset - *offset;
1435                 *offset = noffset;
1436         }
1437
1438         ext_rates_len = num_rates - supp_rates_len;
1439         if (ext_rates_len > 0) {
1440                 if (end - pos < 2 + ext_rates_len)
1441                         goto out_err;
1442                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1443                 *pos++ = ext_rates_len;
1444                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1445                 pos += ext_rates_len;
1446         }
1447
1448         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1449                 if (end - pos < 3)
1450                         goto out_err;
1451                 *pos++ = WLAN_EID_DS_PARAMS;
1452                 *pos++ = 1;
1453                 *pos++ = ieee80211_frequency_to_channel(
1454                                 chandef->chan->center_freq);
1455         }
1456
1457         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1458                 goto done;
1459
1460         /* insert custom IEs that go before HT */
1461         if (ie && ie_len) {
1462                 static const u8 before_ht[] = {
1463                         /*
1464                          * no need to list the ones split off already
1465                          * (or generated here)
1466                          */
1467                         WLAN_EID_DS_PARAMS,
1468                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1469                 };
1470                 noffset = ieee80211_ie_split(ie, ie_len,
1471                                              before_ht, ARRAY_SIZE(before_ht),
1472                                              *offset);
1473                 if (end - pos < noffset - *offset)
1474                         goto out_err;
1475                 memcpy(pos, ie + *offset, noffset - *offset);
1476                 pos += noffset - *offset;
1477                 *offset = noffset;
1478         }
1479
1480         if (sband->ht_cap.ht_supported) {
1481                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1482                         goto out_err;
1483                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1484                                                 sband->ht_cap.cap);
1485         }
1486
1487         /* insert custom IEs that go before VHT */
1488         if (ie && ie_len) {
1489                 static const u8 before_vht[] = {
1490                         /*
1491                          * no need to list the ones split off already
1492                          * (or generated here)
1493                          */
1494                         WLAN_EID_BSS_COEX_2040,
1495                         WLAN_EID_EXT_CAPABILITY,
1496                         WLAN_EID_SSID_LIST,
1497                         WLAN_EID_CHANNEL_USAGE,
1498                         WLAN_EID_INTERWORKING,
1499                         WLAN_EID_MESH_ID,
1500                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1501                 };
1502                 noffset = ieee80211_ie_split(ie, ie_len,
1503                                              before_vht, ARRAY_SIZE(before_vht),
1504                                              *offset);
1505                 if (end - pos < noffset - *offset)
1506                         goto out_err;
1507                 memcpy(pos, ie + *offset, noffset - *offset);
1508                 pos += noffset - *offset;
1509                 *offset = noffset;
1510         }
1511
1512         /* Check if any channel in this sband supports at least 80 MHz */
1513         for (i = 0; i < sband->n_channels; i++) {
1514                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1515                                                 IEEE80211_CHAN_NO_80MHZ))
1516                         continue;
1517
1518                 have_80mhz = true;
1519                 break;
1520         }
1521
1522         if (sband->vht_cap.vht_supported && have_80mhz) {
1523                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1524                         goto out_err;
1525                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1526                                                  sband->vht_cap.cap);
1527         }
1528
1529         /* insert custom IEs that go before HE */
1530         if (ie && ie_len) {
1531                 static const u8 before_he[] = {
1532                         /*
1533                          * no need to list the ones split off before VHT
1534                          * or generated here
1535                          */
1536                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1537                         WLAN_EID_AP_CSN,
1538                         /* TODO: add 11ah/11aj/11ak elements */
1539                 };
1540                 noffset = ieee80211_ie_split(ie, ie_len,
1541                                              before_he, ARRAY_SIZE(before_he),
1542                                              *offset);
1543                 if (end - pos < noffset - *offset)
1544                         goto out_err;
1545                 memcpy(pos, ie + *offset, noffset - *offset);
1546                 pos += noffset - *offset;
1547                 *offset = noffset;
1548         }
1549
1550         he_cap = ieee80211_get_he_sta_cap(sband);
1551         if (he_cap) {
1552                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1553                 if (!pos)
1554                         goto out_err;
1555         }
1556
1557         /*
1558          * If adding more here, adjust code in main.c
1559          * that calculates local->scan_ies_len.
1560          */
1561
1562         return pos - buffer;
1563  out_err:
1564         WARN_ONCE(1, "not enough space for preq IEs\n");
1565  done:
1566         return pos - buffer;
1567 }
1568
1569 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1570                              size_t buffer_len,
1571                              struct ieee80211_scan_ies *ie_desc,
1572                              const u8 *ie, size_t ie_len,
1573                              u8 bands_used, u32 *rate_masks,
1574                              struct cfg80211_chan_def *chandef,
1575                              u32 flags)
1576 {
1577         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1578         int i;
1579
1580         memset(ie_desc, 0, sizeof(*ie_desc));
1581
1582         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1583                 if (bands_used & BIT(i)) {
1584                         pos += ieee80211_build_preq_ies_band(local,
1585                                                              buffer + pos,
1586                                                              buffer_len - pos,
1587                                                              ie, ie_len, i,
1588                                                              rate_masks[i],
1589                                                              chandef,
1590                                                              &custom_ie_offset,
1591                                                              flags);
1592                         ie_desc->ies[i] = buffer + old_pos;
1593                         ie_desc->len[i] = pos - old_pos;
1594                         old_pos = pos;
1595                 }
1596         }
1597
1598         /* add any remaining custom IEs */
1599         if (ie && ie_len) {
1600                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1601                               "not enough space for preq custom IEs\n"))
1602                         return pos;
1603                 memcpy(buffer + pos, ie + custom_ie_offset,
1604                        ie_len - custom_ie_offset);
1605                 ie_desc->common_ies = buffer + pos;
1606                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1607                 pos += ie_len - custom_ie_offset;
1608         }
1609
1610         return pos;
1611 };
1612
1613 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1614                                           const u8 *src, const u8 *dst,
1615                                           u32 ratemask,
1616                                           struct ieee80211_channel *chan,
1617                                           const u8 *ssid, size_t ssid_len,
1618                                           const u8 *ie, size_t ie_len,
1619                                           u32 flags)
1620 {
1621         struct ieee80211_local *local = sdata->local;
1622         struct cfg80211_chan_def chandef;
1623         struct sk_buff *skb;
1624         struct ieee80211_mgmt *mgmt;
1625         int ies_len;
1626         u32 rate_masks[NUM_NL80211_BANDS] = {};
1627         struct ieee80211_scan_ies dummy_ie_desc;
1628
1629         /*
1630          * Do not send DS Channel parameter for directed probe requests
1631          * in order to maximize the chance that we get a response.  Some
1632          * badly-behaved APs don't respond when this parameter is included.
1633          */
1634         chandef.width = sdata->vif.bss_conf.chandef.width;
1635         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1636                 chandef.chan = NULL;
1637         else
1638                 chandef.chan = chan;
1639
1640         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1641                                      100 + ie_len);
1642         if (!skb)
1643                 return NULL;
1644
1645         rate_masks[chan->band] = ratemask;
1646         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1647                                            skb_tailroom(skb), &dummy_ie_desc,
1648                                            ie, ie_len, BIT(chan->band),
1649                                            rate_masks, &chandef, flags);
1650         skb_put(skb, ies_len);
1651
1652         if (dst) {
1653                 mgmt = (struct ieee80211_mgmt *) skb->data;
1654                 memcpy(mgmt->da, dst, ETH_ALEN);
1655                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1656         }
1657
1658         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1659
1660         return skb;
1661 }
1662
1663 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1664                             struct ieee802_11_elems *elems,
1665                             enum nl80211_band band, u32 *basic_rates)
1666 {
1667         struct ieee80211_supported_band *sband;
1668         size_t num_rates;
1669         u32 supp_rates, rate_flags;
1670         int i, j, shift;
1671
1672         sband = sdata->local->hw.wiphy->bands[band];
1673         if (WARN_ON(!sband))
1674                 return 1;
1675
1676         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1677         shift = ieee80211_vif_get_shift(&sdata->vif);
1678
1679         num_rates = sband->n_bitrates;
1680         supp_rates = 0;
1681         for (i = 0; i < elems->supp_rates_len +
1682                      elems->ext_supp_rates_len; i++) {
1683                 u8 rate = 0;
1684                 int own_rate;
1685                 bool is_basic;
1686                 if (i < elems->supp_rates_len)
1687                         rate = elems->supp_rates[i];
1688                 else if (elems->ext_supp_rates)
1689                         rate = elems->ext_supp_rates
1690                                 [i - elems->supp_rates_len];
1691                 own_rate = 5 * (rate & 0x7f);
1692                 is_basic = !!(rate & 0x80);
1693
1694                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1695                         continue;
1696
1697                 for (j = 0; j < num_rates; j++) {
1698                         int brate;
1699                         if ((rate_flags & sband->bitrates[j].flags)
1700                             != rate_flags)
1701                                 continue;
1702
1703                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1704                                              1 << shift);
1705
1706                         if (brate == own_rate) {
1707                                 supp_rates |= BIT(j);
1708                                 if (basic_rates && is_basic)
1709                                         *basic_rates |= BIT(j);
1710                         }
1711                 }
1712         }
1713         return supp_rates;
1714 }
1715
1716 void ieee80211_stop_device(struct ieee80211_local *local)
1717 {
1718         ieee80211_led_radio(local, false);
1719         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1720
1721         cancel_work_sync(&local->reconfig_filter);
1722
1723         flush_workqueue(local->workqueue);
1724         drv_stop(local);
1725 }
1726
1727 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1728                                            bool aborted)
1729 {
1730         /* It's possible that we don't handle the scan completion in
1731          * time during suspend, so if it's still marked as completed
1732          * here, queue the work and flush it to clean things up.
1733          * Instead of calling the worker function directly here, we
1734          * really queue it to avoid potential races with other flows
1735          * scheduling the same work.
1736          */
1737         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1738                 /* If coming from reconfiguration failure, abort the scan so
1739                  * we don't attempt to continue a partial HW scan - which is
1740                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1741                  * completed scan, and a 5 GHz portion is still pending.
1742                  */
1743                 if (aborted)
1744                         set_bit(SCAN_ABORTED, &local->scanning);
1745                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1746                 flush_delayed_work(&local->scan_work);
1747         }
1748 }
1749
1750 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1751 {
1752         struct ieee80211_sub_if_data *sdata;
1753         struct ieee80211_chanctx *ctx;
1754
1755         /*
1756          * We get here if during resume the device can't be restarted properly.
1757          * We might also get here if this happens during HW reset, which is a
1758          * slightly different situation and we need to drop all connections in
1759          * the latter case.
1760          *
1761          * Ask cfg80211 to turn off all interfaces, this will result in more
1762          * warnings but at least we'll then get into a clean stopped state.
1763          */
1764
1765         local->resuming = false;
1766         local->suspended = false;
1767         local->in_reconfig = false;
1768
1769         ieee80211_flush_completed_scan(local, true);
1770
1771         /* scheduled scan clearly can't be running any more, but tell
1772          * cfg80211 and clear local state
1773          */
1774         ieee80211_sched_scan_end(local);
1775
1776         list_for_each_entry(sdata, &local->interfaces, list)
1777                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1778
1779         /* Mark channel contexts as not being in the driver any more to avoid
1780          * removing them from the driver during the shutdown process...
1781          */
1782         mutex_lock(&local->chanctx_mtx);
1783         list_for_each_entry(ctx, &local->chanctx_list, list)
1784                 ctx->driver_present = false;
1785         mutex_unlock(&local->chanctx_mtx);
1786
1787         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1788 }
1789
1790 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1791                                      struct ieee80211_sub_if_data *sdata)
1792 {
1793         struct ieee80211_chanctx_conf *conf;
1794         struct ieee80211_chanctx *ctx;
1795
1796         if (!local->use_chanctx)
1797                 return;
1798
1799         mutex_lock(&local->chanctx_mtx);
1800         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1801                                          lockdep_is_held(&local->chanctx_mtx));
1802         if (conf) {
1803                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1804                 drv_assign_vif_chanctx(local, sdata, ctx);
1805         }
1806         mutex_unlock(&local->chanctx_mtx);
1807 }
1808
1809 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1810 {
1811         struct ieee80211_local *local = sdata->local;
1812         struct sta_info *sta;
1813
1814         /* add STAs back */
1815         mutex_lock(&local->sta_mtx);
1816         list_for_each_entry(sta, &local->sta_list, list) {
1817                 enum ieee80211_sta_state state;
1818
1819                 if (!sta->uploaded || sta->sdata != sdata)
1820                         continue;
1821
1822                 for (state = IEEE80211_STA_NOTEXIST;
1823                      state < sta->sta_state; state++)
1824                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1825                                               state + 1));
1826         }
1827         mutex_unlock(&local->sta_mtx);
1828 }
1829
1830 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1831 {
1832         struct cfg80211_nan_func *func, **funcs;
1833         int res, id, i = 0;
1834
1835         res = drv_start_nan(sdata->local, sdata,
1836                             &sdata->u.nan.conf);
1837         if (WARN_ON(res))
1838                 return res;
1839
1840         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1841                         sizeof(*funcs),
1842                         GFP_KERNEL);
1843         if (!funcs)
1844                 return -ENOMEM;
1845
1846         /* Add all the functions:
1847          * This is a little bit ugly. We need to call a potentially sleeping
1848          * callback for each NAN function, so we can't hold the spinlock.
1849          */
1850         spin_lock_bh(&sdata->u.nan.func_lock);
1851
1852         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1853                 funcs[i++] = func;
1854
1855         spin_unlock_bh(&sdata->u.nan.func_lock);
1856
1857         for (i = 0; funcs[i]; i++) {
1858                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1859                 if (WARN_ON(res))
1860                         ieee80211_nan_func_terminated(&sdata->vif,
1861                                                       funcs[i]->instance_id,
1862                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1863                                                       GFP_KERNEL);
1864         }
1865
1866         kfree(funcs);
1867
1868         return 0;
1869 }
1870
1871 int ieee80211_reconfig(struct ieee80211_local *local)
1872 {
1873         struct ieee80211_hw *hw = &local->hw;
1874         struct ieee80211_sub_if_data *sdata;
1875         struct ieee80211_chanctx *ctx;
1876         struct sta_info *sta;
1877         int res, i;
1878         bool reconfig_due_to_wowlan = false;
1879         struct ieee80211_sub_if_data *sched_scan_sdata;
1880         struct cfg80211_sched_scan_request *sched_scan_req;
1881         bool sched_scan_stopped = false;
1882         bool suspended = local->suspended;
1883
1884         /* nothing to do if HW shouldn't run */
1885         if (!local->open_count)
1886                 goto wake_up;
1887
1888 #ifdef CONFIG_PM
1889         if (suspended)
1890                 local->resuming = true;
1891
1892         if (local->wowlan) {
1893                 /*
1894                  * In the wowlan case, both mac80211 and the device
1895                  * are functional when the resume op is called, so
1896                  * clear local->suspended so the device could operate
1897                  * normally (e.g. pass rx frames).
1898                  */
1899                 local->suspended = false;
1900                 res = drv_resume(local);
1901                 local->wowlan = false;
1902                 if (res < 0) {
1903                         local->resuming = false;
1904                         return res;
1905                 }
1906                 if (res == 0)
1907                         goto wake_up;
1908                 WARN_ON(res > 1);
1909                 /*
1910                  * res is 1, which means the driver requested
1911                  * to go through a regular reset on wakeup.
1912                  * restore local->suspended in this case.
1913                  */
1914                 reconfig_due_to_wowlan = true;
1915                 local->suspended = true;
1916         }
1917 #endif
1918
1919         /*
1920          * In case of hw_restart during suspend (without wowlan),
1921          * cancel restart work, as we are reconfiguring the device
1922          * anyway.
1923          * Note that restart_work is scheduled on a frozen workqueue,
1924          * so we can't deadlock in this case.
1925          */
1926         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1927                 cancel_work_sync(&local->restart_work);
1928
1929         local->started = false;
1930
1931         /*
1932          * Upon resume hardware can sometimes be goofy due to
1933          * various platform / driver / bus issues, so restarting
1934          * the device may at times not work immediately. Propagate
1935          * the error.
1936          */
1937         res = drv_start(local);
1938         if (res) {
1939                 if (suspended)
1940                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1941                 else
1942                         WARN(1, "Hardware became unavailable during restart.\n");
1943                 ieee80211_handle_reconfig_failure(local);
1944                 return res;
1945         }
1946
1947         /* setup fragmentation threshold */
1948         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1949
1950         /* setup RTS threshold */
1951         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1952
1953         /* reset coverage class */
1954         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1955
1956         ieee80211_led_radio(local, true);
1957         ieee80211_mod_tpt_led_trig(local,
1958                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1959
1960         /* add interfaces */
1961         sdata = rtnl_dereference(local->monitor_sdata);
1962         if (sdata) {
1963                 /* in HW restart it exists already */
1964                 WARN_ON(local->resuming);
1965                 res = drv_add_interface(local, sdata);
1966                 if (WARN_ON(res)) {
1967                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1968                         synchronize_net();
1969                         kfree(sdata);
1970                 }
1971         }
1972
1973         list_for_each_entry(sdata, &local->interfaces, list) {
1974                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1975                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1976                     ieee80211_sdata_running(sdata)) {
1977                         res = drv_add_interface(local, sdata);
1978                         if (WARN_ON(res))
1979                                 break;
1980                 }
1981         }
1982
1983         /* If adding any of the interfaces failed above, roll back and
1984          * report failure.
1985          */
1986         if (res) {
1987                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1988                                                      list)
1989                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1990                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1991                             ieee80211_sdata_running(sdata))
1992                                 drv_remove_interface(local, sdata);
1993                 ieee80211_handle_reconfig_failure(local);
1994                 return res;
1995         }
1996
1997         /* add channel contexts */
1998         if (local->use_chanctx) {
1999                 mutex_lock(&local->chanctx_mtx);
2000                 list_for_each_entry(ctx, &local->chanctx_list, list)
2001                         if (ctx->replace_state !=
2002                             IEEE80211_CHANCTX_REPLACES_OTHER)
2003                                 WARN_ON(drv_add_chanctx(local, ctx));
2004                 mutex_unlock(&local->chanctx_mtx);
2005
2006                 sdata = rtnl_dereference(local->monitor_sdata);
2007                 if (sdata && ieee80211_sdata_running(sdata))
2008                         ieee80211_assign_chanctx(local, sdata);
2009         }
2010
2011         /* reconfigure hardware */
2012         ieee80211_hw_config(local, ~0);
2013
2014         ieee80211_configure_filter(local);
2015
2016         /* Finally also reconfigure all the BSS information */
2017         list_for_each_entry(sdata, &local->interfaces, list) {
2018                 u32 changed;
2019
2020                 if (!ieee80211_sdata_running(sdata))
2021                         continue;
2022
2023                 ieee80211_assign_chanctx(local, sdata);
2024
2025                 switch (sdata->vif.type) {
2026                 case NL80211_IFTYPE_AP_VLAN:
2027                 case NL80211_IFTYPE_MONITOR:
2028                         break;
2029                 case NL80211_IFTYPE_ADHOC:
2030                         if (sdata->vif.bss_conf.ibss_joined)
2031                                 WARN_ON(drv_join_ibss(local, sdata));
2032                         /* fall through */
2033                 default:
2034                         ieee80211_reconfig_stations(sdata);
2035                         /* fall through */
2036                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2037                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2038                                 drv_conf_tx(local, sdata, i,
2039                                             &sdata->tx_conf[i]);
2040                         break;
2041                 }
2042
2043                 /* common change flags for all interface types */
2044                 changed = BSS_CHANGED_ERP_CTS_PROT |
2045                           BSS_CHANGED_ERP_PREAMBLE |
2046                           BSS_CHANGED_ERP_SLOT |
2047                           BSS_CHANGED_HT |
2048                           BSS_CHANGED_BASIC_RATES |
2049                           BSS_CHANGED_BEACON_INT |
2050                           BSS_CHANGED_BSSID |
2051                           BSS_CHANGED_CQM |
2052                           BSS_CHANGED_QOS |
2053                           BSS_CHANGED_IDLE |
2054                           BSS_CHANGED_TXPOWER |
2055                           BSS_CHANGED_MCAST_RATE;
2056
2057                 if (sdata->vif.mu_mimo_owner)
2058                         changed |= BSS_CHANGED_MU_GROUPS;
2059
2060                 switch (sdata->vif.type) {
2061                 case NL80211_IFTYPE_STATION:
2062                         changed |= BSS_CHANGED_ASSOC |
2063                                    BSS_CHANGED_ARP_FILTER |
2064                                    BSS_CHANGED_PS;
2065
2066                         /* Re-send beacon info report to the driver */
2067                         if (sdata->u.mgd.have_beacon)
2068                                 changed |= BSS_CHANGED_BEACON_INFO;
2069
2070                         if (sdata->vif.bss_conf.max_idle_period ||
2071                             sdata->vif.bss_conf.protected_keep_alive)
2072                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2073
2074                         sdata_lock(sdata);
2075                         ieee80211_bss_info_change_notify(sdata, changed);
2076                         sdata_unlock(sdata);
2077                         break;
2078                 case NL80211_IFTYPE_OCB:
2079                         changed |= BSS_CHANGED_OCB;
2080                         ieee80211_bss_info_change_notify(sdata, changed);
2081                         break;
2082                 case NL80211_IFTYPE_ADHOC:
2083                         changed |= BSS_CHANGED_IBSS;
2084                         /* fall through */
2085                 case NL80211_IFTYPE_AP:
2086                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2087
2088                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2089                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2090
2091                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2092                                         drv_start_ap(local, sdata);
2093                         }
2094
2095                         /* fall through */
2096                 case NL80211_IFTYPE_MESH_POINT:
2097                         if (sdata->vif.bss_conf.enable_beacon) {
2098                                 changed |= BSS_CHANGED_BEACON |
2099                                            BSS_CHANGED_BEACON_ENABLED;
2100                                 ieee80211_bss_info_change_notify(sdata, changed);
2101                         }
2102                         break;
2103                 case NL80211_IFTYPE_NAN:
2104                         res = ieee80211_reconfig_nan(sdata);
2105                         if (res < 0) {
2106                                 ieee80211_handle_reconfig_failure(local);
2107                                 return res;
2108                         }
2109                         break;
2110                 case NL80211_IFTYPE_WDS:
2111                 case NL80211_IFTYPE_AP_VLAN:
2112                 case NL80211_IFTYPE_MONITOR:
2113                 case NL80211_IFTYPE_P2P_DEVICE:
2114                         /* nothing to do */
2115                         break;
2116                 case NL80211_IFTYPE_UNSPECIFIED:
2117                 case NUM_NL80211_IFTYPES:
2118                 case NL80211_IFTYPE_P2P_CLIENT:
2119                 case NL80211_IFTYPE_P2P_GO:
2120                         WARN_ON(1);
2121                         break;
2122                 }
2123         }
2124
2125         ieee80211_recalc_ps(local);
2126
2127         /*
2128          * The sta might be in psm against the ap (e.g. because
2129          * this was the state before a hw restart), so we
2130          * explicitly send a null packet in order to make sure
2131          * it'll sync against the ap (and get out of psm).
2132          */
2133         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2134                 list_for_each_entry(sdata, &local->interfaces, list) {
2135                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2136                                 continue;
2137                         if (!sdata->u.mgd.associated)
2138                                 continue;
2139
2140                         ieee80211_send_nullfunc(local, sdata, false);
2141                 }
2142         }
2143
2144         /* APs are now beaconing, add back stations */
2145         mutex_lock(&local->sta_mtx);
2146         list_for_each_entry(sta, &local->sta_list, list) {
2147                 enum ieee80211_sta_state state;
2148
2149                 if (!sta->uploaded)
2150                         continue;
2151
2152                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2153                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2154                         continue;
2155
2156                 for (state = IEEE80211_STA_NOTEXIST;
2157                      state < sta->sta_state; state++)
2158                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2159                                               state + 1));
2160         }
2161         mutex_unlock(&local->sta_mtx);
2162
2163         /* add back keys */
2164         list_for_each_entry(sdata, &local->interfaces, list)
2165                 ieee80211_reset_crypto_tx_tailroom(sdata);
2166
2167         list_for_each_entry(sdata, &local->interfaces, list)
2168                 if (ieee80211_sdata_running(sdata))
2169                         ieee80211_enable_keys(sdata);
2170
2171         /* Reconfigure sched scan if it was interrupted by FW restart */
2172         mutex_lock(&local->mtx);
2173         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2174                                                 lockdep_is_held(&local->mtx));
2175         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2176                                                 lockdep_is_held(&local->mtx));
2177         if (sched_scan_sdata && sched_scan_req)
2178                 /*
2179                  * Sched scan stopped, but we don't want to report it. Instead,
2180                  * we're trying to reschedule. However, if more than one scan
2181                  * plan was set, we cannot reschedule since we don't know which
2182                  * scan plan was currently running (and some scan plans may have
2183                  * already finished).
2184                  */
2185                 if (sched_scan_req->n_scan_plans > 1 ||
2186                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2187                                                          sched_scan_req)) {
2188                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2189                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2190                         sched_scan_stopped = true;
2191                 }
2192         mutex_unlock(&local->mtx);
2193
2194         if (sched_scan_stopped)
2195                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2196
2197  wake_up:
2198
2199         if (local->monitors == local->open_count && local->monitors > 0)
2200                 ieee80211_add_virtual_monitor(local);
2201
2202         /*
2203          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2204          * sessions can be established after a resume.
2205          *
2206          * Also tear down aggregation sessions since reconfiguring
2207          * them in a hardware restart scenario is not easily done
2208          * right now, and the hardware will have lost information
2209          * about the sessions, but we and the AP still think they
2210          * are active. This is really a workaround though.
2211          */
2212         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2213                 mutex_lock(&local->sta_mtx);
2214
2215                 list_for_each_entry(sta, &local->sta_list, list) {
2216                         if (!local->resuming)
2217                                 ieee80211_sta_tear_down_BA_sessions(
2218                                                 sta, AGG_STOP_LOCAL_REQUEST);
2219                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2220                 }
2221
2222                 mutex_unlock(&local->sta_mtx);
2223         }
2224
2225         if (local->in_reconfig) {
2226                 local->in_reconfig = false;
2227                 barrier();
2228
2229                 /* Restart deferred ROCs */
2230                 mutex_lock(&local->mtx);
2231                 ieee80211_start_next_roc(local);
2232                 mutex_unlock(&local->mtx);
2233
2234                 /* Requeue all works */
2235                 list_for_each_entry(sdata, &local->interfaces, list)
2236                         ieee80211_queue_work(&local->hw, &sdata->work);
2237         }
2238
2239         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2240                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2241                                         false);
2242
2243         /*
2244          * If this is for hw restart things are still running.
2245          * We may want to change that later, however.
2246          */
2247         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2248                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2249
2250         if (!suspended)
2251                 return 0;
2252
2253 #ifdef CONFIG_PM
2254         /* first set suspended false, then resuming */
2255         local->suspended = false;
2256         mb();
2257         local->resuming = false;
2258
2259         ieee80211_flush_completed_scan(local, false);
2260
2261         if (local->open_count && !reconfig_due_to_wowlan)
2262                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2263
2264         list_for_each_entry(sdata, &local->interfaces, list) {
2265                 if (!ieee80211_sdata_running(sdata))
2266                         continue;
2267                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2268                         ieee80211_sta_restart(sdata);
2269         }
2270
2271         mod_timer(&local->sta_cleanup, jiffies + 1);
2272 #else
2273         WARN_ON(1);
2274 #endif
2275
2276         return 0;
2277 }
2278
2279 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2280 {
2281         struct ieee80211_sub_if_data *sdata;
2282         struct ieee80211_local *local;
2283         struct ieee80211_key *key;
2284
2285         if (WARN_ON(!vif))
2286                 return;
2287
2288         sdata = vif_to_sdata(vif);
2289         local = sdata->local;
2290
2291         if (WARN_ON(!local->resuming))
2292                 return;
2293
2294         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2295                 return;
2296
2297         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2298
2299         mutex_lock(&local->key_mtx);
2300         list_for_each_entry(key, &sdata->key_list, list)
2301                 key->flags |= KEY_FLAG_TAINTED;
2302         mutex_unlock(&local->key_mtx);
2303 }
2304 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2305
2306 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2307 {
2308         struct ieee80211_local *local = sdata->local;
2309         struct ieee80211_chanctx_conf *chanctx_conf;
2310         struct ieee80211_chanctx *chanctx;
2311
2312         mutex_lock(&local->chanctx_mtx);
2313
2314         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2315                                         lockdep_is_held(&local->chanctx_mtx));
2316
2317         /*
2318          * This function can be called from a work, thus it may be possible
2319          * that the chanctx_conf is removed (due to a disconnection, for
2320          * example).
2321          * So nothing should be done in such case.
2322          */
2323         if (!chanctx_conf)
2324                 goto unlock;
2325
2326         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2327         ieee80211_recalc_smps_chanctx(local, chanctx);
2328  unlock:
2329         mutex_unlock(&local->chanctx_mtx);
2330 }
2331
2332 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2333 {
2334         struct ieee80211_local *local = sdata->local;
2335         struct ieee80211_chanctx_conf *chanctx_conf;
2336         struct ieee80211_chanctx *chanctx;
2337
2338         mutex_lock(&local->chanctx_mtx);
2339
2340         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2341                                         lockdep_is_held(&local->chanctx_mtx));
2342
2343         if (WARN_ON_ONCE(!chanctx_conf))
2344                 goto unlock;
2345
2346         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2347         ieee80211_recalc_chanctx_min_def(local, chanctx);
2348  unlock:
2349         mutex_unlock(&local->chanctx_mtx);
2350 }
2351
2352 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2353 {
2354         size_t pos = offset;
2355
2356         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2357                 pos += 2 + ies[pos + 1];
2358
2359         return pos;
2360 }
2361
2362 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2363                                             int rssi_min_thold,
2364                                             int rssi_max_thold)
2365 {
2366         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2367
2368         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2369                 return;
2370
2371         /*
2372          * Scale up threshold values before storing it, as the RSSI averaging
2373          * algorithm uses a scaled up value as well. Change this scaling
2374          * factor if the RSSI averaging algorithm changes.
2375          */
2376         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2377         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2378 }
2379
2380 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2381                                     int rssi_min_thold,
2382                                     int rssi_max_thold)
2383 {
2384         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2385
2386         WARN_ON(rssi_min_thold == rssi_max_thold ||
2387                 rssi_min_thold > rssi_max_thold);
2388
2389         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2390                                        rssi_max_thold);
2391 }
2392 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2393
2394 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2395 {
2396         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2397
2398         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2399 }
2400 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2401
2402 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2403                               u16 cap)
2404 {
2405         __le16 tmp;
2406
2407         *pos++ = WLAN_EID_HT_CAPABILITY;
2408         *pos++ = sizeof(struct ieee80211_ht_cap);
2409         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2410
2411         /* capability flags */
2412         tmp = cpu_to_le16(cap);
2413         memcpy(pos, &tmp, sizeof(u16));
2414         pos += sizeof(u16);
2415
2416         /* AMPDU parameters */
2417         *pos++ = ht_cap->ampdu_factor |
2418                  (ht_cap->ampdu_density <<
2419                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2420
2421         /* MCS set */
2422         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2423         pos += sizeof(ht_cap->mcs);
2424
2425         /* extended capabilities */
2426         pos += sizeof(__le16);
2427
2428         /* BF capabilities */
2429         pos += sizeof(__le32);
2430
2431         /* antenna selection */
2432         pos += sizeof(u8);
2433
2434         return pos;
2435 }
2436
2437 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2438                                u32 cap)
2439 {
2440         __le32 tmp;
2441
2442         *pos++ = WLAN_EID_VHT_CAPABILITY;
2443         *pos++ = sizeof(struct ieee80211_vht_cap);
2444         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2445
2446         /* capability flags */
2447         tmp = cpu_to_le32(cap);
2448         memcpy(pos, &tmp, sizeof(u32));
2449         pos += sizeof(u32);
2450
2451         /* VHT MCS set */
2452         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2453         pos += sizeof(vht_cap->vht_mcs);
2454
2455         return pos;
2456 }
2457
2458 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2459                               const struct ieee80211_sta_he_cap *he_cap,
2460                               u8 *end)
2461 {
2462         u8 n;
2463         u8 ie_len;
2464         u8 *orig_pos = pos;
2465
2466         /* Make sure we have place for the IE */
2467         /*
2468          * TODO: the 1 added is because this temporarily is under the EXTENSION
2469          * IE. Get rid of it when it moves.
2470          */
2471         if (!he_cap)
2472                 return orig_pos;
2473
2474         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2475         ie_len = 2 + 1 +
2476                  sizeof(he_cap->he_cap_elem) + n +
2477                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2478                                        he_cap->he_cap_elem.phy_cap_info);
2479
2480         if ((end - pos) < ie_len)
2481                 return orig_pos;
2482
2483         *pos++ = WLAN_EID_EXTENSION;
2484         pos++; /* We'll set the size later below */
2485         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2486
2487         /* Fixed data */
2488         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2489         pos += sizeof(he_cap->he_cap_elem);
2490
2491         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2492         pos += n;
2493
2494         /* Check if PPE Threshold should be present */
2495         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2496              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2497                 goto end;
2498
2499         /*
2500          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2501          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2502          */
2503         n = hweight8(he_cap->ppe_thres[0] &
2504                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2505         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2506                    IEEE80211_PPE_THRES_NSS_POS));
2507
2508         /*
2509          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2510          * total size.
2511          */
2512         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2513         n = DIV_ROUND_UP(n, 8);
2514
2515         /* Copy PPE Thresholds */
2516         memcpy(pos, &he_cap->ppe_thres, n);
2517         pos += n;
2518
2519 end:
2520         orig_pos[1] = (pos - orig_pos) - 2;
2521         return pos;
2522 }
2523
2524 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2525                                const struct cfg80211_chan_def *chandef,
2526                                u16 prot_mode, bool rifs_mode)
2527 {
2528         struct ieee80211_ht_operation *ht_oper;
2529         /* Build HT Information */
2530         *pos++ = WLAN_EID_HT_OPERATION;
2531         *pos++ = sizeof(struct ieee80211_ht_operation);
2532         ht_oper = (struct ieee80211_ht_operation *)pos;
2533         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2534                                         chandef->chan->center_freq);
2535         switch (chandef->width) {
2536         case NL80211_CHAN_WIDTH_160:
2537         case NL80211_CHAN_WIDTH_80P80:
2538         case NL80211_CHAN_WIDTH_80:
2539         case NL80211_CHAN_WIDTH_40:
2540                 if (chandef->center_freq1 > chandef->chan->center_freq)
2541                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2542                 else
2543                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2544                 break;
2545         default:
2546                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2547                 break;
2548         }
2549         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2550             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2551             chandef->width != NL80211_CHAN_WIDTH_20)
2552                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2553
2554         if (rifs_mode)
2555                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2556
2557         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2558         ht_oper->stbc_param = 0x0000;
2559
2560         /* It seems that Basic MCS set and Supported MCS set
2561            are identical for the first 10 bytes */
2562         memset(&ht_oper->basic_set, 0, 16);
2563         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2564
2565         return pos + sizeof(struct ieee80211_ht_operation);
2566 }
2567
2568 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2569                                    const struct cfg80211_chan_def *chandef)
2570 {
2571         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2572         *pos++ = 3;                                     /* IE length */
2573         /* New channel width */
2574         switch (chandef->width) {
2575         case NL80211_CHAN_WIDTH_80:
2576                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2577                 break;
2578         case NL80211_CHAN_WIDTH_160:
2579                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2580                 break;
2581         case NL80211_CHAN_WIDTH_80P80:
2582                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2583                 break;
2584         default:
2585                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2586         }
2587
2588         /* new center frequency segment 0 */
2589         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2590         /* new center frequency segment 1 */
2591         if (chandef->center_freq2)
2592                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2593         else
2594                 *pos++ = 0;
2595 }
2596
2597 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2598                                 const struct cfg80211_chan_def *chandef)
2599 {
2600         struct ieee80211_vht_operation *vht_oper;
2601
2602         *pos++ = WLAN_EID_VHT_OPERATION;
2603         *pos++ = sizeof(struct ieee80211_vht_operation);
2604         vht_oper = (struct ieee80211_vht_operation *)pos;
2605         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2606                                                         chandef->center_freq1);
2607         if (chandef->center_freq2)
2608                 vht_oper->center_freq_seg1_idx =
2609                         ieee80211_frequency_to_channel(chandef->center_freq2);
2610         else
2611                 vht_oper->center_freq_seg1_idx = 0x00;
2612
2613         switch (chandef->width) {
2614         case NL80211_CHAN_WIDTH_160:
2615                 /*
2616                  * Convert 160 MHz channel width to new style as interop
2617                  * workaround.
2618                  */
2619                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2620                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2621                 if (chandef->chan->center_freq < chandef->center_freq1)
2622                         vht_oper->center_freq_seg0_idx -= 8;
2623                 else
2624                         vht_oper->center_freq_seg0_idx += 8;
2625                 break;
2626         case NL80211_CHAN_WIDTH_80P80:
2627                 /*
2628                  * Convert 80+80 MHz channel width to new style as interop
2629                  * workaround.
2630                  */
2631                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2632                 break;
2633         case NL80211_CHAN_WIDTH_80:
2634                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2635                 break;
2636         default:
2637                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2638                 break;
2639         }
2640
2641         /* don't require special VHT peer rates */
2642         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2643
2644         return pos + sizeof(struct ieee80211_vht_operation);
2645 }
2646
2647 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2648                                struct cfg80211_chan_def *chandef)
2649 {
2650         enum nl80211_channel_type channel_type;
2651
2652         if (!ht_oper)
2653                 return false;
2654
2655         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2656         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2657                 channel_type = NL80211_CHAN_HT20;
2658                 break;
2659         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2660                 channel_type = NL80211_CHAN_HT40PLUS;
2661                 break;
2662         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2663                 channel_type = NL80211_CHAN_HT40MINUS;
2664                 break;
2665         default:
2666                 channel_type = NL80211_CHAN_NO_HT;
2667                 return false;
2668         }
2669
2670         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2671         return true;
2672 }
2673
2674 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2675                                 struct cfg80211_chan_def *chandef)
2676 {
2677         struct cfg80211_chan_def new = *chandef;
2678         int cf1, cf2;
2679
2680         if (!oper)
2681                 return false;
2682
2683         cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2684                                              chandef->chan->band);
2685         cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2686                                              chandef->chan->band);
2687
2688         switch (oper->chan_width) {
2689         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2690                 break;
2691         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2692                 new.width = NL80211_CHAN_WIDTH_80;
2693                 new.center_freq1 = cf1;
2694                 /* If needed, adjust based on the newer interop workaround. */
2695                 if (oper->center_freq_seg1_idx) {
2696                         unsigned int diff;
2697
2698                         diff = abs(oper->center_freq_seg1_idx -
2699                                    oper->center_freq_seg0_idx);
2700                         if (diff == 8) {
2701                                 new.width = NL80211_CHAN_WIDTH_160;
2702                                 new.center_freq1 = cf2;
2703                         } else if (diff > 8) {
2704                                 new.width = NL80211_CHAN_WIDTH_80P80;
2705                                 new.center_freq2 = cf2;
2706                         }
2707                 }
2708                 break;
2709         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2710                 new.width = NL80211_CHAN_WIDTH_160;
2711                 new.center_freq1 = cf1;
2712                 break;
2713         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2714                 new.width = NL80211_CHAN_WIDTH_80P80;
2715                 new.center_freq1 = cf1;
2716                 new.center_freq2 = cf2;
2717                 break;
2718         default:
2719                 return false;
2720         }
2721
2722         if (!cfg80211_chandef_valid(&new))
2723                 return false;
2724
2725         *chandef = new;
2726         return true;
2727 }
2728
2729 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2730                              const struct ieee80211_supported_band *sband,
2731                              const u8 *srates, int srates_len, u32 *rates)
2732 {
2733         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2734         int shift = ieee80211_chandef_get_shift(chandef);
2735         struct ieee80211_rate *br;
2736         int brate, rate, i, j, count = 0;
2737
2738         *rates = 0;
2739
2740         for (i = 0; i < srates_len; i++) {
2741                 rate = srates[i] & 0x7f;
2742
2743                 for (j = 0; j < sband->n_bitrates; j++) {
2744                         br = &sband->bitrates[j];
2745                         if ((rate_flags & br->flags) != rate_flags)
2746                                 continue;
2747
2748                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2749                         if (brate == rate) {
2750                                 *rates |= BIT(j);
2751                                 count++;
2752                                 break;
2753                         }
2754                 }
2755         }
2756         return count;
2757 }
2758
2759 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2760                             struct sk_buff *skb, bool need_basic,
2761                             enum nl80211_band band)
2762 {
2763         struct ieee80211_local *local = sdata->local;
2764         struct ieee80211_supported_band *sband;
2765         int rate, shift;
2766         u8 i, rates, *pos;
2767         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2768         u32 rate_flags;
2769
2770         shift = ieee80211_vif_get_shift(&sdata->vif);
2771         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2772         sband = local->hw.wiphy->bands[band];
2773         rates = 0;
2774         for (i = 0; i < sband->n_bitrates; i++) {
2775                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2776                         continue;
2777                 rates++;
2778         }
2779         if (rates > 8)
2780                 rates = 8;
2781
2782         if (skb_tailroom(skb) < rates + 2)
2783                 return -ENOMEM;
2784
2785         pos = skb_put(skb, rates + 2);
2786         *pos++ = WLAN_EID_SUPP_RATES;
2787         *pos++ = rates;
2788         for (i = 0; i < rates; i++) {
2789                 u8 basic = 0;
2790                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2791                         continue;
2792
2793                 if (need_basic && basic_rates & BIT(i))
2794                         basic = 0x80;
2795                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2796                                     5 * (1 << shift));
2797                 *pos++ = basic | (u8) rate;
2798         }
2799
2800         return 0;
2801 }
2802
2803 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2804                                 struct sk_buff *skb, bool need_basic,
2805                                 enum nl80211_band band)
2806 {
2807         struct ieee80211_local *local = sdata->local;
2808         struct ieee80211_supported_band *sband;
2809         int rate, shift;
2810         u8 i, exrates, *pos;
2811         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2812         u32 rate_flags;
2813
2814         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2815         shift = ieee80211_vif_get_shift(&sdata->vif);
2816
2817         sband = local->hw.wiphy->bands[band];
2818         exrates = 0;
2819         for (i = 0; i < sband->n_bitrates; i++) {
2820                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2821                         continue;
2822                 exrates++;
2823         }
2824
2825         if (exrates > 8)
2826                 exrates -= 8;
2827         else
2828                 exrates = 0;
2829
2830         if (skb_tailroom(skb) < exrates + 2)
2831                 return -ENOMEM;
2832
2833         if (exrates) {
2834                 pos = skb_put(skb, exrates + 2);
2835                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2836                 *pos++ = exrates;
2837                 for (i = 8; i < sband->n_bitrates; i++) {
2838                         u8 basic = 0;
2839                         if ((rate_flags & sband->bitrates[i].flags)
2840                             != rate_flags)
2841                                 continue;
2842                         if (need_basic && basic_rates & BIT(i))
2843                                 basic = 0x80;
2844                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2845                                             5 * (1 << shift));
2846                         *pos++ = basic | (u8) rate;
2847                 }
2848         }
2849         return 0;
2850 }
2851
2852 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2853 {
2854         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2855         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2856
2857         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2858                 /* non-managed type inferfaces */
2859                 return 0;
2860         }
2861         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2862 }
2863 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2864
2865 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2866 {
2867         if (!mcs)
2868                 return 1;
2869
2870         /* TODO: consider rx_highest */
2871
2872         if (mcs->rx_mask[3])
2873                 return 4;
2874         if (mcs->rx_mask[2])
2875                 return 3;
2876         if (mcs->rx_mask[1])
2877                 return 2;
2878         return 1;
2879 }
2880
2881 /**
2882  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2883  * @local: mac80211 hw info struct
2884  * @status: RX status
2885  * @mpdu_len: total MPDU length (including FCS)
2886  * @mpdu_offset: offset into MPDU to calculate timestamp at
2887  *
2888  * This function calculates the RX timestamp at the given MPDU offset, taking
2889  * into account what the RX timestamp was. An offset of 0 will just normalize
2890  * the timestamp to TSF at beginning of MPDU reception.
2891  */
2892 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2893                                      struct ieee80211_rx_status *status,
2894                                      unsigned int mpdu_len,
2895                                      unsigned int mpdu_offset)
2896 {
2897         u64 ts = status->mactime;
2898         struct rate_info ri;
2899         u16 rate;
2900
2901         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2902                 return 0;
2903
2904         memset(&ri, 0, sizeof(ri));
2905
2906         ri.bw = status->bw;
2907
2908         /* Fill cfg80211 rate info */
2909         switch (status->encoding) {
2910         case RX_ENC_HT:
2911                 ri.mcs = status->rate_idx;
2912                 ri.flags |= RATE_INFO_FLAGS_MCS;
2913                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2914                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2915                 break;
2916         case RX_ENC_VHT:
2917                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2918                 ri.mcs = status->rate_idx;
2919                 ri.nss = status->nss;
2920                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2921                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2922                 break;
2923         default:
2924                 WARN_ON(1);
2925                 /* fall through */
2926         case RX_ENC_LEGACY: {
2927                 struct ieee80211_supported_band *sband;
2928                 int shift = 0;
2929                 int bitrate;
2930
2931                 switch (status->bw) {
2932                 case RATE_INFO_BW_10:
2933                         shift = 1;
2934                         break;
2935                 case RATE_INFO_BW_5:
2936                         shift = 2;
2937                         break;
2938                 }
2939
2940                 sband = local->hw.wiphy->bands[status->band];
2941                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2942                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2943
2944                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2945                         /* TODO: handle HT/VHT preambles */
2946                         if (status->band == NL80211_BAND_5GHZ) {
2947                                 ts += 20 << shift;
2948                                 mpdu_offset += 2;
2949                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2950                                 ts += 96;
2951                         } else {
2952                                 ts += 192;
2953                         }
2954                 }
2955                 break;
2956                 }
2957         }
2958
2959         rate = cfg80211_calculate_bitrate(&ri);
2960         if (WARN_ONCE(!rate,
2961                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2962                       (unsigned long long)status->flag, status->rate_idx,
2963                       status->nss))
2964                 return 0;
2965
2966         /* rewind from end of MPDU */
2967         if (status->flag & RX_FLAG_MACTIME_END)
2968                 ts -= mpdu_len * 8 * 10 / rate;
2969
2970         ts += mpdu_offset * 8 * 10 / rate;
2971
2972         return ts;
2973 }
2974
2975 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2976 {
2977         struct ieee80211_sub_if_data *sdata;
2978         struct cfg80211_chan_def chandef;
2979
2980         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2981         ASSERT_RTNL();
2982
2983         mutex_lock(&local->mtx);
2984         list_for_each_entry(sdata, &local->interfaces, list) {
2985                 /* it might be waiting for the local->mtx, but then
2986                  * by the time it gets it, sdata->wdev.cac_started
2987                  * will no longer be true
2988                  */
2989                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2990
2991                 if (sdata->wdev.cac_started) {
2992                         chandef = sdata->vif.bss_conf.chandef;
2993                         ieee80211_vif_release_channel(sdata);
2994                         cfg80211_cac_event(sdata->dev,
2995                                            &chandef,
2996                                            NL80211_RADAR_CAC_ABORTED,
2997                                            GFP_KERNEL);
2998                 }
2999         }
3000         mutex_unlock(&local->mtx);
3001 }
3002
3003 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3004 {
3005         struct ieee80211_local *local =
3006                 container_of(work, struct ieee80211_local, radar_detected_work);
3007         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3008         struct ieee80211_chanctx *ctx;
3009         int num_chanctx = 0;
3010
3011         mutex_lock(&local->chanctx_mtx);
3012         list_for_each_entry(ctx, &local->chanctx_list, list) {
3013                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3014                         continue;
3015
3016                 num_chanctx++;
3017                 chandef = ctx->conf.def;
3018         }
3019         mutex_unlock(&local->chanctx_mtx);
3020
3021         rtnl_lock();
3022         ieee80211_dfs_cac_cancel(local);
3023         rtnl_unlock();
3024
3025         if (num_chanctx > 1)
3026                 /* XXX: multi-channel is not supported yet */
3027                 WARN_ON(1);
3028         else
3029                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3030 }
3031
3032 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3033 {
3034         struct ieee80211_local *local = hw_to_local(hw);
3035
3036         trace_api_radar_detected(local);
3037
3038         schedule_work(&local->radar_detected_work);
3039 }
3040 EXPORT_SYMBOL(ieee80211_radar_detected);
3041
3042 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3043 {
3044         u32 ret;
3045         int tmp;
3046
3047         switch (c->width) {
3048         case NL80211_CHAN_WIDTH_20:
3049                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3050                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3051                 break;
3052         case NL80211_CHAN_WIDTH_40:
3053                 c->width = NL80211_CHAN_WIDTH_20;
3054                 c->center_freq1 = c->chan->center_freq;
3055                 ret = IEEE80211_STA_DISABLE_40MHZ |
3056                       IEEE80211_STA_DISABLE_VHT;
3057                 break;
3058         case NL80211_CHAN_WIDTH_80:
3059                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3060                 /* n_P40 */
3061                 tmp /= 2;
3062                 /* freq_P40 */
3063                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3064                 c->width = NL80211_CHAN_WIDTH_40;
3065                 ret = IEEE80211_STA_DISABLE_VHT;
3066                 break;
3067         case NL80211_CHAN_WIDTH_80P80:
3068                 c->center_freq2 = 0;
3069                 c->width = NL80211_CHAN_WIDTH_80;
3070                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3071                       IEEE80211_STA_DISABLE_160MHZ;
3072                 break;
3073         case NL80211_CHAN_WIDTH_160:
3074                 /* n_P20 */
3075                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3076                 /* n_P80 */
3077                 tmp /= 4;
3078                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3079                 c->width = NL80211_CHAN_WIDTH_80;
3080                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3081                       IEEE80211_STA_DISABLE_160MHZ;
3082                 break;
3083         default:
3084         case NL80211_CHAN_WIDTH_20_NOHT:
3085                 WARN_ON_ONCE(1);
3086                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3087                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3088                 break;
3089         case NL80211_CHAN_WIDTH_5:
3090         case NL80211_CHAN_WIDTH_10:
3091                 WARN_ON_ONCE(1);
3092                 /* keep c->width */
3093                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3094                 break;
3095         }
3096
3097         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3098
3099         return ret;
3100 }
3101
3102 /*
3103  * Returns true if smps_mode_new is strictly more restrictive than
3104  * smps_mode_old.
3105  */
3106 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3107                                    enum ieee80211_smps_mode smps_mode_new)
3108 {
3109         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3110                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3111                 return false;
3112
3113         switch (smps_mode_old) {
3114         case IEEE80211_SMPS_STATIC:
3115                 return false;
3116         case IEEE80211_SMPS_DYNAMIC:
3117                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3118         case IEEE80211_SMPS_OFF:
3119                 return smps_mode_new != IEEE80211_SMPS_OFF;
3120         default:
3121                 WARN_ON(1);
3122         }
3123
3124         return false;
3125 }
3126
3127 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3128                               struct cfg80211_csa_settings *csa_settings)
3129 {
3130         struct sk_buff *skb;
3131         struct ieee80211_mgmt *mgmt;
3132         struct ieee80211_local *local = sdata->local;
3133         int freq;
3134         int hdr_len = offsetofend(struct ieee80211_mgmt,
3135                                   u.action.u.chan_switch);
3136         u8 *pos;
3137
3138         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3139             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3140                 return -EOPNOTSUPP;
3141
3142         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3143                             5 + /* channel switch announcement element */
3144                             3 + /* secondary channel offset element */
3145                             5 + /* wide bandwidth channel switch announcement */
3146                             8); /* mesh channel switch parameters element */
3147         if (!skb)
3148                 return -ENOMEM;
3149
3150         skb_reserve(skb, local->tx_headroom);
3151         mgmt = skb_put_zero(skb, hdr_len);
3152         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3153                                           IEEE80211_STYPE_ACTION);
3154
3155         eth_broadcast_addr(mgmt->da);
3156         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3157         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3158                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3159         } else {
3160                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3161                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3162         }
3163         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3164         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3165         pos = skb_put(skb, 5);
3166         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3167         *pos++ = 3;                                             /* IE length */
3168         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3169         freq = csa_settings->chandef.chan->center_freq;
3170         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3171         *pos++ = csa_settings->count;                           /* count */
3172
3173         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3174                 enum nl80211_channel_type ch_type;
3175
3176                 skb_put(skb, 3);
3177                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3178                 *pos++ = 1;                                     /* IE length */
3179                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3180                 if (ch_type == NL80211_CHAN_HT40PLUS)
3181                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3182                 else
3183                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3184         }
3185
3186         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3187                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3188
3189                 skb_put(skb, 8);
3190                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3191                 *pos++ = 6;                                     /* IE length */
3192                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3193                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3194                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3195                 *pos++ |= csa_settings->block_tx ?
3196                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3197                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3198                 pos += 2;
3199                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3200                 pos += 2;
3201         }
3202
3203         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3204             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3205             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3206                 skb_put(skb, 5);
3207                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3208         }
3209
3210         ieee80211_tx_skb(sdata, skb);
3211         return 0;
3212 }
3213
3214 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3215 {
3216         return !(cs == NULL || cs->cipher == 0 ||
3217                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3218                  cs->hdr_len <= cs->key_idx_off ||
3219                  cs->key_idx_shift > 7 ||
3220                  cs->key_idx_mask == 0);
3221 }
3222
3223 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3224 {
3225         int i;
3226
3227         /* Ensure we have enough iftype bitmap space for all iftype values */
3228         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3229
3230         for (i = 0; i < n; i++)
3231                 if (!ieee80211_cs_valid(&cs[i]))
3232                         return false;
3233
3234         return true;
3235 }
3236
3237 const struct ieee80211_cipher_scheme *
3238 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3239                  enum nl80211_iftype iftype)
3240 {
3241         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3242         int n = local->hw.n_cipher_schemes;
3243         int i;
3244         const struct ieee80211_cipher_scheme *cs = NULL;
3245
3246         for (i = 0; i < n; i++) {
3247                 if (l[i].cipher == cipher) {
3248                         cs = &l[i];
3249                         break;
3250                 }
3251         }
3252
3253         if (!cs || !(cs->iftype & BIT(iftype)))
3254                 return NULL;
3255
3256         return cs;
3257 }
3258
3259 int ieee80211_cs_headroom(struct ieee80211_local *local,
3260                           struct cfg80211_crypto_settings *crypto,
3261                           enum nl80211_iftype iftype)
3262 {
3263         const struct ieee80211_cipher_scheme *cs;
3264         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3265         int i;
3266
3267         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3268                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3269                                       iftype);
3270
3271                 if (cs && headroom < cs->hdr_len)
3272                         headroom = cs->hdr_len;
3273         }
3274
3275         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3276         if (cs && headroom < cs->hdr_len)
3277                 headroom = cs->hdr_len;
3278
3279         return headroom;
3280 }
3281
3282 static bool
3283 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3284 {
3285         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3286         int skip;
3287
3288         if (end > 0)
3289                 return false;
3290
3291         /* One shot NOA  */
3292         if (data->count[i] == 1)
3293                 return false;
3294
3295         if (data->desc[i].interval == 0)
3296                 return false;
3297
3298         /* End time is in the past, check for repetitions */
3299         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3300         if (data->count[i] < 255) {
3301                 if (data->count[i] <= skip) {
3302                         data->count[i] = 0;
3303                         return false;
3304                 }
3305
3306                 data->count[i] -= skip;
3307         }
3308
3309         data->desc[i].start += skip * data->desc[i].interval;
3310
3311         return true;
3312 }
3313
3314 static bool
3315 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3316                              s32 *offset)
3317 {
3318         bool ret = false;
3319         int i;
3320
3321         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3322                 s32 cur;
3323
3324                 if (!data->count[i])
3325                         continue;
3326
3327                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3328                         ret = true;
3329
3330                 cur = data->desc[i].start - tsf;
3331                 if (cur > *offset)
3332                         continue;
3333
3334                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3335                 if (cur > *offset)
3336                         *offset = cur;
3337         }
3338
3339         return ret;
3340 }
3341
3342 static u32
3343 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3344 {
3345         s32 offset = 0;
3346         int tries = 0;
3347         /*
3348          * arbitrary limit, used to avoid infinite loops when combined NoA
3349          * descriptors cover the full time period.
3350          */
3351         int max_tries = 5;
3352
3353         ieee80211_extend_absent_time(data, tsf, &offset);
3354         do {
3355                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3356                         break;
3357
3358                 tries++;
3359         } while (tries < max_tries);
3360
3361         return offset;
3362 }
3363
3364 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3365 {
3366         u32 next_offset = BIT(31) - 1;
3367         int i;
3368
3369         data->absent = 0;
3370         data->has_next_tsf = false;
3371         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3372                 s32 start;
3373
3374                 if (!data->count[i])
3375                         continue;
3376
3377                 ieee80211_extend_noa_desc(data, tsf, i);
3378                 start = data->desc[i].start - tsf;
3379                 if (start <= 0)
3380                         data->absent |= BIT(i);
3381
3382                 if (next_offset > start)
3383                         next_offset = start;
3384
3385                 data->has_next_tsf = true;
3386         }
3387
3388         if (data->absent)
3389                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3390
3391         data->next_tsf = tsf + next_offset;
3392 }
3393 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3394
3395 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3396                             struct ieee80211_noa_data *data, u32 tsf)
3397 {
3398         int ret = 0;
3399         int i;
3400
3401         memset(data, 0, sizeof(*data));
3402
3403         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3404                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3405
3406                 if (!desc->count || !desc->duration)
3407                         continue;
3408
3409                 data->count[i] = desc->count;
3410                 data->desc[i].start = le32_to_cpu(desc->start_time);
3411                 data->desc[i].duration = le32_to_cpu(desc->duration);
3412                 data->desc[i].interval = le32_to_cpu(desc->interval);
3413
3414                 if (data->count[i] > 1 &&
3415                     data->desc[i].interval < data->desc[i].duration)
3416                         continue;
3417
3418                 ieee80211_extend_noa_desc(data, tsf, i);
3419                 ret++;
3420         }
3421
3422         if (ret)
3423                 ieee80211_update_p2p_noa(data, tsf);
3424
3425         return ret;
3426 }
3427 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3428
3429 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3430                            struct ieee80211_sub_if_data *sdata)
3431 {
3432         u64 tsf = drv_get_tsf(local, sdata);
3433         u64 dtim_count = 0;
3434         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3435         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3436         struct ps_data *ps;
3437         u8 bcns_from_dtim;
3438
3439         if (tsf == -1ULL || !beacon_int || !dtim_period)
3440                 return;
3441
3442         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3443             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3444                 if (!sdata->bss)
3445                         return;
3446
3447                 ps = &sdata->bss->ps;
3448         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3449                 ps = &sdata->u.mesh.ps;
3450         } else {
3451                 return;
3452         }
3453
3454         /*
3455          * actually finds last dtim_count, mac80211 will update in
3456          * __beacon_add_tim().
3457          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3458          */
3459         do_div(tsf, beacon_int);
3460         bcns_from_dtim = do_div(tsf, dtim_period);
3461         /* just had a DTIM */
3462         if (!bcns_from_dtim)
3463                 dtim_count = 0;
3464         else
3465                 dtim_count = dtim_period - bcns_from_dtim;
3466
3467         ps->dtim_count = dtim_count;
3468 }
3469
3470 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3471                                          struct ieee80211_chanctx *ctx)
3472 {
3473         struct ieee80211_sub_if_data *sdata;
3474         u8 radar_detect = 0;
3475
3476         lockdep_assert_held(&local->chanctx_mtx);
3477
3478         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3479                 return 0;
3480
3481         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3482                 if (sdata->reserved_radar_required)
3483                         radar_detect |= BIT(sdata->reserved_chandef.width);
3484
3485         /*
3486          * An in-place reservation context should not have any assigned vifs
3487          * until it replaces the other context.
3488          */
3489         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3490                 !list_empty(&ctx->assigned_vifs));
3491
3492         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3493                 if (sdata->radar_required)
3494                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3495
3496         return radar_detect;
3497 }
3498
3499 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3500                                  const struct cfg80211_chan_def *chandef,
3501                                  enum ieee80211_chanctx_mode chanmode,
3502                                  u8 radar_detect)
3503 {
3504         struct ieee80211_local *local = sdata->local;
3505         struct ieee80211_sub_if_data *sdata_iter;
3506         enum nl80211_iftype iftype = sdata->wdev.iftype;
3507         struct ieee80211_chanctx *ctx;
3508         int total = 1;
3509         struct iface_combination_params params = {
3510                 .radar_detect = radar_detect,
3511         };
3512
3513         lockdep_assert_held(&local->chanctx_mtx);
3514
3515         if (WARN_ON(hweight32(radar_detect) > 1))
3516                 return -EINVAL;
3517
3518         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3519                     !chandef->chan))
3520                 return -EINVAL;
3521
3522         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3523                 return -EINVAL;
3524
3525         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3526             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3527                 /*
3528                  * always passing this is harmless, since it'll be the
3529                  * same value that cfg80211 finds if it finds the same
3530                  * interface ... and that's always allowed
3531                  */
3532                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3533         }
3534
3535         /* Always allow software iftypes */
3536         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3537                 if (radar_detect)
3538                         return -EINVAL;
3539                 return 0;
3540         }
3541
3542         if (chandef)
3543                 params.num_different_channels = 1;
3544
3545         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3546                 params.iftype_num[iftype] = 1;
3547
3548         list_for_each_entry(ctx, &local->chanctx_list, list) {
3549                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3550                         continue;
3551                 params.radar_detect |=
3552                         ieee80211_chanctx_radar_detect(local, ctx);
3553                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3554                         params.num_different_channels++;
3555                         continue;
3556                 }
3557                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3558                     cfg80211_chandef_compatible(chandef,
3559                                                 &ctx->conf.def))
3560                         continue;
3561                 params.num_different_channels++;
3562         }
3563
3564         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3565                 struct wireless_dev *wdev_iter;
3566
3567                 wdev_iter = &sdata_iter->wdev;
3568
3569                 if (sdata_iter == sdata ||
3570                     !ieee80211_sdata_running(sdata_iter) ||
3571                     cfg80211_iftype_allowed(local->hw.wiphy,
3572                                             wdev_iter->iftype, 0, 1))
3573                         continue;
3574
3575                 params.iftype_num[wdev_iter->iftype]++;
3576                 total++;
3577         }
3578
3579         if (total == 1 && !params.radar_detect)
3580                 return 0;
3581
3582         return cfg80211_check_combinations(local->hw.wiphy, &params);
3583 }
3584
3585 static void
3586 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3587                          void *data)
3588 {
3589         u32 *max_num_different_channels = data;
3590
3591         *max_num_different_channels = max(*max_num_different_channels,
3592                                           c->num_different_channels);
3593 }
3594
3595 int ieee80211_max_num_channels(struct ieee80211_local *local)
3596 {
3597         struct ieee80211_sub_if_data *sdata;
3598         struct ieee80211_chanctx *ctx;
3599         u32 max_num_different_channels = 1;
3600         int err;
3601         struct iface_combination_params params = {0};
3602
3603         lockdep_assert_held(&local->chanctx_mtx);
3604
3605         list_for_each_entry(ctx, &local->chanctx_list, list) {
3606                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3607                         continue;
3608
3609                 params.num_different_channels++;
3610
3611                 params.radar_detect |=
3612                         ieee80211_chanctx_radar_detect(local, ctx);
3613         }
3614
3615         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3616                 params.iftype_num[sdata->wdev.iftype]++;
3617
3618         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3619                                          ieee80211_iter_max_chans,
3620                                          &max_num_different_channels);
3621         if (err < 0)
3622                 return err;
3623
3624         return max_num_different_channels;
3625 }
3626
3627 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3628 {
3629         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3630         *buf++ = 7; /* len */
3631         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3632         *buf++ = 0x50;
3633         *buf++ = 0xf2;
3634         *buf++ = 2; /* WME */
3635         *buf++ = 0; /* WME info */
3636         *buf++ = 1; /* WME ver */
3637         *buf++ = qosinfo; /* U-APSD no in use */
3638
3639         return buf;
3640 }
3641
3642 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3643                              unsigned long *frame_cnt,
3644                              unsigned long *byte_cnt)
3645 {
3646         struct txq_info *txqi = to_txq_info(txq);
3647         u32 frag_cnt = 0, frag_bytes = 0;
3648         struct sk_buff *skb;
3649
3650         skb_queue_walk(&txqi->frags, skb) {
3651                 frag_cnt++;
3652                 frag_bytes += skb->len;
3653         }
3654
3655         if (frame_cnt)
3656                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3657
3658         if (byte_cnt)
3659                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3660 }
3661 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3662
3663 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3664         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3665         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3666         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3667         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3668 };