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 (!elen)
1106                                 break;
1107                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1108                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1109                                 elems->mu_edca_param_set = (void *)&pos[1];
1110                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1111                                 elems->he_cap = (void *)&pos[1];
1112                                 elems->he_cap_len = elen - 1;
1113                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1114                                    elen >= sizeof(*elems->he_operation) &&
1115                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1116                                 elems->he_operation = (void *)&pos[1];
1117                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1118                                 elems->uora_element = (void *)&pos[1];
1119                         }
1120                         break;
1121                 default:
1122                         break;
1123                 }
1124
1125                 if (elem_parse_failed)
1126                         elems->parse_error = true;
1127                 else
1128                         __set_bit(id, seen_elems);
1129
1130                 left -= elen;
1131                 pos += elen;
1132         }
1133
1134         if (left != 0)
1135                 elems->parse_error = true;
1136
1137         return crc;
1138 }
1139
1140 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1141                                            struct ieee80211_tx_queue_params
1142                                            *qparam, int ac)
1143 {
1144         struct ieee80211_chanctx_conf *chanctx_conf;
1145         const struct ieee80211_reg_rule *rrule;
1146         const struct ieee80211_wmm_ac *wmm_ac;
1147         u16 center_freq = 0;
1148
1149         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1150             sdata->vif.type != NL80211_IFTYPE_STATION)
1151                 return;
1152
1153         rcu_read_lock();
1154         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1155         if (chanctx_conf)
1156                 center_freq = chanctx_conf->def.chan->center_freq;
1157
1158         if (!center_freq) {
1159                 rcu_read_unlock();
1160                 return;
1161         }
1162
1163         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1164
1165         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1166                 rcu_read_unlock();
1167                 return;
1168         }
1169
1170         if (sdata->vif.type == NL80211_IFTYPE_AP)
1171                 wmm_ac = &rrule->wmm_rule.ap[ac];
1172         else
1173                 wmm_ac = &rrule->wmm_rule.client[ac];
1174         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1175         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1176         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1177         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1178         rcu_read_unlock();
1179 }
1180
1181 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1182                                bool bss_notify, bool enable_qos)
1183 {
1184         struct ieee80211_local *local = sdata->local;
1185         struct ieee80211_tx_queue_params qparam;
1186         struct ieee80211_chanctx_conf *chanctx_conf;
1187         int ac;
1188         bool use_11b;
1189         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1190         int aCWmin, aCWmax;
1191
1192         if (!local->ops->conf_tx)
1193                 return;
1194
1195         if (local->hw.queues < IEEE80211_NUM_ACS)
1196                 return;
1197
1198         memset(&qparam, 0, sizeof(qparam));
1199
1200         rcu_read_lock();
1201         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1202         use_11b = (chanctx_conf &&
1203                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1204                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1205         rcu_read_unlock();
1206
1207         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1208
1209         /* Set defaults according to 802.11-2007 Table 7-37 */
1210         aCWmax = 1023;
1211         if (use_11b)
1212                 aCWmin = 31;
1213         else
1214                 aCWmin = 15;
1215
1216         /* Confiure old 802.11b/g medium access rules. */
1217         qparam.cw_max = aCWmax;
1218         qparam.cw_min = aCWmin;
1219         qparam.txop = 0;
1220         qparam.aifs = 2;
1221
1222         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1223                 /* Update if QoS is enabled. */
1224                 if (enable_qos) {
1225                         switch (ac) {
1226                         case IEEE80211_AC_BK:
1227                                 qparam.cw_max = aCWmax;
1228                                 qparam.cw_min = aCWmin;
1229                                 qparam.txop = 0;
1230                                 if (is_ocb)
1231                                         qparam.aifs = 9;
1232                                 else
1233                                         qparam.aifs = 7;
1234                                 break;
1235                         /* never happens but let's not leave undefined */
1236                         default:
1237                         case IEEE80211_AC_BE:
1238                                 qparam.cw_max = aCWmax;
1239                                 qparam.cw_min = aCWmin;
1240                                 qparam.txop = 0;
1241                                 if (is_ocb)
1242                                         qparam.aifs = 6;
1243                                 else
1244                                         qparam.aifs = 3;
1245                                 break;
1246                         case IEEE80211_AC_VI:
1247                                 qparam.cw_max = aCWmin;
1248                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1249                                 if (is_ocb)
1250                                         qparam.txop = 0;
1251                                 else if (use_11b)
1252                                         qparam.txop = 6016/32;
1253                                 else
1254                                         qparam.txop = 3008/32;
1255
1256                                 if (is_ocb)
1257                                         qparam.aifs = 3;
1258                                 else
1259                                         qparam.aifs = 2;
1260                                 break;
1261                         case IEEE80211_AC_VO:
1262                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1263                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1264                                 if (is_ocb)
1265                                         qparam.txop = 0;
1266                                 else if (use_11b)
1267                                         qparam.txop = 3264/32;
1268                                 else
1269                                         qparam.txop = 1504/32;
1270                                 qparam.aifs = 2;
1271                                 break;
1272                         }
1273                 }
1274                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1275
1276                 qparam.uapsd = false;
1277
1278                 sdata->tx_conf[ac] = qparam;
1279                 drv_conf_tx(local, sdata, ac, &qparam);
1280         }
1281
1282         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1283             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1284             sdata->vif.type != NL80211_IFTYPE_NAN) {
1285                 sdata->vif.bss_conf.qos = enable_qos;
1286                 if (bss_notify)
1287                         ieee80211_bss_info_change_notify(sdata,
1288                                                          BSS_CHANGED_QOS);
1289         }
1290 }
1291
1292 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1293                          u16 transaction, u16 auth_alg, u16 status,
1294                          const u8 *extra, size_t extra_len, const u8 *da,
1295                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1296                          u32 tx_flags)
1297 {
1298         struct ieee80211_local *local = sdata->local;
1299         struct sk_buff *skb;
1300         struct ieee80211_mgmt *mgmt;
1301         int err;
1302
1303         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1304         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1305                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1306         if (!skb)
1307                 return;
1308
1309         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1310
1311         mgmt = skb_put_zero(skb, 24 + 6);
1312         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1313                                           IEEE80211_STYPE_AUTH);
1314         memcpy(mgmt->da, da, ETH_ALEN);
1315         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1316         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1317         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1318         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1319         mgmt->u.auth.status_code = cpu_to_le16(status);
1320         if (extra)
1321                 skb_put_data(skb, extra, extra_len);
1322
1323         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1324                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1325                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1326                 WARN_ON(err);
1327         }
1328
1329         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1330                                         tx_flags;
1331         ieee80211_tx_skb(sdata, skb);
1332 }
1333
1334 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1335                                     const u8 *bssid, u16 stype, u16 reason,
1336                                     bool send_frame, u8 *frame_buf)
1337 {
1338         struct ieee80211_local *local = sdata->local;
1339         struct sk_buff *skb;
1340         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1341
1342         /* build frame */
1343         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1344         mgmt->duration = 0; /* initialize only */
1345         mgmt->seq_ctrl = 0; /* initialize only */
1346         memcpy(mgmt->da, bssid, ETH_ALEN);
1347         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1348         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1349         /* u.deauth.reason_code == u.disassoc.reason_code */
1350         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1351
1352         if (send_frame) {
1353                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1354                                     IEEE80211_DEAUTH_FRAME_LEN);
1355                 if (!skb)
1356                         return;
1357
1358                 skb_reserve(skb, local->hw.extra_tx_headroom);
1359
1360                 /* copy in frame */
1361                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1362
1363                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1364                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1365                         IEEE80211_SKB_CB(skb)->flags |=
1366                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1367
1368                 ieee80211_tx_skb(sdata, skb);
1369         }
1370 }
1371
1372 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1373                                          u8 *buffer, size_t buffer_len,
1374                                          const u8 *ie, size_t ie_len,
1375                                          enum nl80211_band band,
1376                                          u32 rate_mask,
1377                                          struct cfg80211_chan_def *chandef,
1378                                          size_t *offset, u32 flags)
1379 {
1380         struct ieee80211_supported_band *sband;
1381         const struct ieee80211_sta_he_cap *he_cap;
1382         u8 *pos = buffer, *end = buffer + buffer_len;
1383         size_t noffset;
1384         int supp_rates_len, i;
1385         u8 rates[32];
1386         int num_rates;
1387         int ext_rates_len;
1388         int shift;
1389         u32 rate_flags;
1390         bool have_80mhz = false;
1391
1392         *offset = 0;
1393
1394         sband = local->hw.wiphy->bands[band];
1395         if (WARN_ON_ONCE(!sband))
1396                 return 0;
1397
1398         rate_flags = ieee80211_chandef_rate_flags(chandef);
1399         shift = ieee80211_chandef_get_shift(chandef);
1400
1401         num_rates = 0;
1402         for (i = 0; i < sband->n_bitrates; i++) {
1403                 if ((BIT(i) & rate_mask) == 0)
1404                         continue; /* skip rate */
1405                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1406                         continue;
1407
1408                 rates[num_rates++] =
1409                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1410                                           (1 << shift) * 5);
1411         }
1412
1413         supp_rates_len = min_t(int, num_rates, 8);
1414
1415         if (end - pos < 2 + supp_rates_len)
1416                 goto out_err;
1417         *pos++ = WLAN_EID_SUPP_RATES;
1418         *pos++ = supp_rates_len;
1419         memcpy(pos, rates, supp_rates_len);
1420         pos += supp_rates_len;
1421
1422         /* insert "request information" if in custom IEs */
1423         if (ie && ie_len) {
1424                 static const u8 before_extrates[] = {
1425                         WLAN_EID_SSID,
1426                         WLAN_EID_SUPP_RATES,
1427                         WLAN_EID_REQUEST,
1428                 };
1429                 noffset = ieee80211_ie_split(ie, ie_len,
1430                                              before_extrates,
1431                                              ARRAY_SIZE(before_extrates),
1432                                              *offset);
1433                 if (end - pos < noffset - *offset)
1434                         goto out_err;
1435                 memcpy(pos, ie + *offset, noffset - *offset);
1436                 pos += noffset - *offset;
1437                 *offset = noffset;
1438         }
1439
1440         ext_rates_len = num_rates - supp_rates_len;
1441         if (ext_rates_len > 0) {
1442                 if (end - pos < 2 + ext_rates_len)
1443                         goto out_err;
1444                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1445                 *pos++ = ext_rates_len;
1446                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1447                 pos += ext_rates_len;
1448         }
1449
1450         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1451                 if (end - pos < 3)
1452                         goto out_err;
1453                 *pos++ = WLAN_EID_DS_PARAMS;
1454                 *pos++ = 1;
1455                 *pos++ = ieee80211_frequency_to_channel(
1456                                 chandef->chan->center_freq);
1457         }
1458
1459         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1460                 goto done;
1461
1462         /* insert custom IEs that go before HT */
1463         if (ie && ie_len) {
1464                 static const u8 before_ht[] = {
1465                         /*
1466                          * no need to list the ones split off already
1467                          * (or generated here)
1468                          */
1469                         WLAN_EID_DS_PARAMS,
1470                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1471                 };
1472                 noffset = ieee80211_ie_split(ie, ie_len,
1473                                              before_ht, ARRAY_SIZE(before_ht),
1474                                              *offset);
1475                 if (end - pos < noffset - *offset)
1476                         goto out_err;
1477                 memcpy(pos, ie + *offset, noffset - *offset);
1478                 pos += noffset - *offset;
1479                 *offset = noffset;
1480         }
1481
1482         if (sband->ht_cap.ht_supported) {
1483                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1484                         goto out_err;
1485                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1486                                                 sband->ht_cap.cap);
1487         }
1488
1489         /* insert custom IEs that go before VHT */
1490         if (ie && ie_len) {
1491                 static const u8 before_vht[] = {
1492                         /*
1493                          * no need to list the ones split off already
1494                          * (or generated here)
1495                          */
1496                         WLAN_EID_BSS_COEX_2040,
1497                         WLAN_EID_EXT_CAPABILITY,
1498                         WLAN_EID_SSID_LIST,
1499                         WLAN_EID_CHANNEL_USAGE,
1500                         WLAN_EID_INTERWORKING,
1501                         WLAN_EID_MESH_ID,
1502                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1503                 };
1504                 noffset = ieee80211_ie_split(ie, ie_len,
1505                                              before_vht, ARRAY_SIZE(before_vht),
1506                                              *offset);
1507                 if (end - pos < noffset - *offset)
1508                         goto out_err;
1509                 memcpy(pos, ie + *offset, noffset - *offset);
1510                 pos += noffset - *offset;
1511                 *offset = noffset;
1512         }
1513
1514         /* Check if any channel in this sband supports at least 80 MHz */
1515         for (i = 0; i < sband->n_channels; i++) {
1516                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1517                                                 IEEE80211_CHAN_NO_80MHZ))
1518                         continue;
1519
1520                 have_80mhz = true;
1521                 break;
1522         }
1523
1524         if (sband->vht_cap.vht_supported && have_80mhz) {
1525                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1526                         goto out_err;
1527                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1528                                                  sband->vht_cap.cap);
1529         }
1530
1531         /* insert custom IEs that go before HE */
1532         if (ie && ie_len) {
1533                 static const u8 before_he[] = {
1534                         /*
1535                          * no need to list the ones split off before VHT
1536                          * or generated here
1537                          */
1538                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1539                         WLAN_EID_AP_CSN,
1540                         /* TODO: add 11ah/11aj/11ak elements */
1541                 };
1542                 noffset = ieee80211_ie_split(ie, ie_len,
1543                                              before_he, ARRAY_SIZE(before_he),
1544                                              *offset);
1545                 if (end - pos < noffset - *offset)
1546                         goto out_err;
1547                 memcpy(pos, ie + *offset, noffset - *offset);
1548                 pos += noffset - *offset;
1549                 *offset = noffset;
1550         }
1551
1552         he_cap = ieee80211_get_he_sta_cap(sband);
1553         if (he_cap) {
1554                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1555                 if (!pos)
1556                         goto out_err;
1557         }
1558
1559         /*
1560          * If adding more here, adjust code in main.c
1561          * that calculates local->scan_ies_len.
1562          */
1563
1564         return pos - buffer;
1565  out_err:
1566         WARN_ONCE(1, "not enough space for preq IEs\n");
1567  done:
1568         return pos - buffer;
1569 }
1570
1571 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1572                              size_t buffer_len,
1573                              struct ieee80211_scan_ies *ie_desc,
1574                              const u8 *ie, size_t ie_len,
1575                              u8 bands_used, u32 *rate_masks,
1576                              struct cfg80211_chan_def *chandef,
1577                              u32 flags)
1578 {
1579         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1580         int i;
1581
1582         memset(ie_desc, 0, sizeof(*ie_desc));
1583
1584         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1585                 if (bands_used & BIT(i)) {
1586                         pos += ieee80211_build_preq_ies_band(local,
1587                                                              buffer + pos,
1588                                                              buffer_len - pos,
1589                                                              ie, ie_len, i,
1590                                                              rate_masks[i],
1591                                                              chandef,
1592                                                              &custom_ie_offset,
1593                                                              flags);
1594                         ie_desc->ies[i] = buffer + old_pos;
1595                         ie_desc->len[i] = pos - old_pos;
1596                         old_pos = pos;
1597                 }
1598         }
1599
1600         /* add any remaining custom IEs */
1601         if (ie && ie_len) {
1602                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1603                               "not enough space for preq custom IEs\n"))
1604                         return pos;
1605                 memcpy(buffer + pos, ie + custom_ie_offset,
1606                        ie_len - custom_ie_offset);
1607                 ie_desc->common_ies = buffer + pos;
1608                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1609                 pos += ie_len - custom_ie_offset;
1610         }
1611
1612         return pos;
1613 };
1614
1615 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1616                                           const u8 *src, const u8 *dst,
1617                                           u32 ratemask,
1618                                           struct ieee80211_channel *chan,
1619                                           const u8 *ssid, size_t ssid_len,
1620                                           const u8 *ie, size_t ie_len,
1621                                           u32 flags)
1622 {
1623         struct ieee80211_local *local = sdata->local;
1624         struct cfg80211_chan_def chandef;
1625         struct sk_buff *skb;
1626         struct ieee80211_mgmt *mgmt;
1627         int ies_len;
1628         u32 rate_masks[NUM_NL80211_BANDS] = {};
1629         struct ieee80211_scan_ies dummy_ie_desc;
1630
1631         /*
1632          * Do not send DS Channel parameter for directed probe requests
1633          * in order to maximize the chance that we get a response.  Some
1634          * badly-behaved APs don't respond when this parameter is included.
1635          */
1636         chandef.width = sdata->vif.bss_conf.chandef.width;
1637         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1638                 chandef.chan = NULL;
1639         else
1640                 chandef.chan = chan;
1641
1642         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1643                                      100 + ie_len);
1644         if (!skb)
1645                 return NULL;
1646
1647         rate_masks[chan->band] = ratemask;
1648         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1649                                            skb_tailroom(skb), &dummy_ie_desc,
1650                                            ie, ie_len, BIT(chan->band),
1651                                            rate_masks, &chandef, flags);
1652         skb_put(skb, ies_len);
1653
1654         if (dst) {
1655                 mgmt = (struct ieee80211_mgmt *) skb->data;
1656                 memcpy(mgmt->da, dst, ETH_ALEN);
1657                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1658         }
1659
1660         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1661
1662         return skb;
1663 }
1664
1665 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1666                             struct ieee802_11_elems *elems,
1667                             enum nl80211_band band, u32 *basic_rates)
1668 {
1669         struct ieee80211_supported_band *sband;
1670         size_t num_rates;
1671         u32 supp_rates, rate_flags;
1672         int i, j, shift;
1673
1674         sband = sdata->local->hw.wiphy->bands[band];
1675         if (WARN_ON(!sband))
1676                 return 1;
1677
1678         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1679         shift = ieee80211_vif_get_shift(&sdata->vif);
1680
1681         num_rates = sband->n_bitrates;
1682         supp_rates = 0;
1683         for (i = 0; i < elems->supp_rates_len +
1684                      elems->ext_supp_rates_len; i++) {
1685                 u8 rate = 0;
1686                 int own_rate;
1687                 bool is_basic;
1688                 if (i < elems->supp_rates_len)
1689                         rate = elems->supp_rates[i];
1690                 else if (elems->ext_supp_rates)
1691                         rate = elems->ext_supp_rates
1692                                 [i - elems->supp_rates_len];
1693                 own_rate = 5 * (rate & 0x7f);
1694                 is_basic = !!(rate & 0x80);
1695
1696                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1697                         continue;
1698
1699                 for (j = 0; j < num_rates; j++) {
1700                         int brate;
1701                         if ((rate_flags & sband->bitrates[j].flags)
1702                             != rate_flags)
1703                                 continue;
1704
1705                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1706                                              1 << shift);
1707
1708                         if (brate == own_rate) {
1709                                 supp_rates |= BIT(j);
1710                                 if (basic_rates && is_basic)
1711                                         *basic_rates |= BIT(j);
1712                         }
1713                 }
1714         }
1715         return supp_rates;
1716 }
1717
1718 void ieee80211_stop_device(struct ieee80211_local *local)
1719 {
1720         ieee80211_led_radio(local, false);
1721         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1722
1723         cancel_work_sync(&local->reconfig_filter);
1724
1725         flush_workqueue(local->workqueue);
1726         drv_stop(local);
1727 }
1728
1729 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1730                                            bool aborted)
1731 {
1732         /* It's possible that we don't handle the scan completion in
1733          * time during suspend, so if it's still marked as completed
1734          * here, queue the work and flush it to clean things up.
1735          * Instead of calling the worker function directly here, we
1736          * really queue it to avoid potential races with other flows
1737          * scheduling the same work.
1738          */
1739         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1740                 /* If coming from reconfiguration failure, abort the scan so
1741                  * we don't attempt to continue a partial HW scan - which is
1742                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1743                  * completed scan, and a 5 GHz portion is still pending.
1744                  */
1745                 if (aborted)
1746                         set_bit(SCAN_ABORTED, &local->scanning);
1747                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1748                 flush_delayed_work(&local->scan_work);
1749         }
1750 }
1751
1752 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1753 {
1754         struct ieee80211_sub_if_data *sdata;
1755         struct ieee80211_chanctx *ctx;
1756
1757         /*
1758          * We get here if during resume the device can't be restarted properly.
1759          * We might also get here if this happens during HW reset, which is a
1760          * slightly different situation and we need to drop all connections in
1761          * the latter case.
1762          *
1763          * Ask cfg80211 to turn off all interfaces, this will result in more
1764          * warnings but at least we'll then get into a clean stopped state.
1765          */
1766
1767         local->resuming = false;
1768         local->suspended = false;
1769         local->in_reconfig = false;
1770
1771         ieee80211_flush_completed_scan(local, true);
1772
1773         /* scheduled scan clearly can't be running any more, but tell
1774          * cfg80211 and clear local state
1775          */
1776         ieee80211_sched_scan_end(local);
1777
1778         list_for_each_entry(sdata, &local->interfaces, list)
1779                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1780
1781         /* Mark channel contexts as not being in the driver any more to avoid
1782          * removing them from the driver during the shutdown process...
1783          */
1784         mutex_lock(&local->chanctx_mtx);
1785         list_for_each_entry(ctx, &local->chanctx_list, list)
1786                 ctx->driver_present = false;
1787         mutex_unlock(&local->chanctx_mtx);
1788
1789         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1790 }
1791
1792 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1793                                      struct ieee80211_sub_if_data *sdata)
1794 {
1795         struct ieee80211_chanctx_conf *conf;
1796         struct ieee80211_chanctx *ctx;
1797
1798         if (!local->use_chanctx)
1799                 return;
1800
1801         mutex_lock(&local->chanctx_mtx);
1802         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1803                                          lockdep_is_held(&local->chanctx_mtx));
1804         if (conf) {
1805                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1806                 drv_assign_vif_chanctx(local, sdata, ctx);
1807         }
1808         mutex_unlock(&local->chanctx_mtx);
1809 }
1810
1811 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1812 {
1813         struct ieee80211_local *local = sdata->local;
1814         struct sta_info *sta;
1815
1816         /* add STAs back */
1817         mutex_lock(&local->sta_mtx);
1818         list_for_each_entry(sta, &local->sta_list, list) {
1819                 enum ieee80211_sta_state state;
1820
1821                 if (!sta->uploaded || sta->sdata != sdata)
1822                         continue;
1823
1824                 for (state = IEEE80211_STA_NOTEXIST;
1825                      state < sta->sta_state; state++)
1826                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1827                                               state + 1));
1828         }
1829         mutex_unlock(&local->sta_mtx);
1830 }
1831
1832 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1833 {
1834         struct cfg80211_nan_func *func, **funcs;
1835         int res, id, i = 0;
1836
1837         res = drv_start_nan(sdata->local, sdata,
1838                             &sdata->u.nan.conf);
1839         if (WARN_ON(res))
1840                 return res;
1841
1842         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1843                         sizeof(*funcs),
1844                         GFP_KERNEL);
1845         if (!funcs)
1846                 return -ENOMEM;
1847
1848         /* Add all the functions:
1849          * This is a little bit ugly. We need to call a potentially sleeping
1850          * callback for each NAN function, so we can't hold the spinlock.
1851          */
1852         spin_lock_bh(&sdata->u.nan.func_lock);
1853
1854         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1855                 funcs[i++] = func;
1856
1857         spin_unlock_bh(&sdata->u.nan.func_lock);
1858
1859         for (i = 0; funcs[i]; i++) {
1860                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1861                 if (WARN_ON(res))
1862                         ieee80211_nan_func_terminated(&sdata->vif,
1863                                                       funcs[i]->instance_id,
1864                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1865                                                       GFP_KERNEL);
1866         }
1867
1868         kfree(funcs);
1869
1870         return 0;
1871 }
1872
1873 int ieee80211_reconfig(struct ieee80211_local *local)
1874 {
1875         struct ieee80211_hw *hw = &local->hw;
1876         struct ieee80211_sub_if_data *sdata;
1877         struct ieee80211_chanctx *ctx;
1878         struct sta_info *sta;
1879         int res, i;
1880         bool reconfig_due_to_wowlan = false;
1881         struct ieee80211_sub_if_data *sched_scan_sdata;
1882         struct cfg80211_sched_scan_request *sched_scan_req;
1883         bool sched_scan_stopped = false;
1884         bool suspended = local->suspended;
1885
1886         /* nothing to do if HW shouldn't run */
1887         if (!local->open_count)
1888                 goto wake_up;
1889
1890 #ifdef CONFIG_PM
1891         if (suspended)
1892                 local->resuming = true;
1893
1894         if (local->wowlan) {
1895                 /*
1896                  * In the wowlan case, both mac80211 and the device
1897                  * are functional when the resume op is called, so
1898                  * clear local->suspended so the device could operate
1899                  * normally (e.g. pass rx frames).
1900                  */
1901                 local->suspended = false;
1902                 res = drv_resume(local);
1903                 local->wowlan = false;
1904                 if (res < 0) {
1905                         local->resuming = false;
1906                         return res;
1907                 }
1908                 if (res == 0)
1909                         goto wake_up;
1910                 WARN_ON(res > 1);
1911                 /*
1912                  * res is 1, which means the driver requested
1913                  * to go through a regular reset on wakeup.
1914                  * restore local->suspended in this case.
1915                  */
1916                 reconfig_due_to_wowlan = true;
1917                 local->suspended = true;
1918         }
1919 #endif
1920
1921         /*
1922          * In case of hw_restart during suspend (without wowlan),
1923          * cancel restart work, as we are reconfiguring the device
1924          * anyway.
1925          * Note that restart_work is scheduled on a frozen workqueue,
1926          * so we can't deadlock in this case.
1927          */
1928         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1929                 cancel_work_sync(&local->restart_work);
1930
1931         local->started = false;
1932
1933         /*
1934          * Upon resume hardware can sometimes be goofy due to
1935          * various platform / driver / bus issues, so restarting
1936          * the device may at times not work immediately. Propagate
1937          * the error.
1938          */
1939         res = drv_start(local);
1940         if (res) {
1941                 if (suspended)
1942                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1943                 else
1944                         WARN(1, "Hardware became unavailable during restart.\n");
1945                 ieee80211_handle_reconfig_failure(local);
1946                 return res;
1947         }
1948
1949         /* setup fragmentation threshold */
1950         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1951
1952         /* setup RTS threshold */
1953         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1954
1955         /* reset coverage class */
1956         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1957
1958         ieee80211_led_radio(local, true);
1959         ieee80211_mod_tpt_led_trig(local,
1960                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1961
1962         /* add interfaces */
1963         sdata = rtnl_dereference(local->monitor_sdata);
1964         if (sdata) {
1965                 /* in HW restart it exists already */
1966                 WARN_ON(local->resuming);
1967                 res = drv_add_interface(local, sdata);
1968                 if (WARN_ON(res)) {
1969                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1970                         synchronize_net();
1971                         kfree(sdata);
1972                 }
1973         }
1974
1975         list_for_each_entry(sdata, &local->interfaces, list) {
1976                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1977                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1978                     ieee80211_sdata_running(sdata)) {
1979                         res = drv_add_interface(local, sdata);
1980                         if (WARN_ON(res))
1981                                 break;
1982                 }
1983         }
1984
1985         /* If adding any of the interfaces failed above, roll back and
1986          * report failure.
1987          */
1988         if (res) {
1989                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1990                                                      list)
1991                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1992                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1993                             ieee80211_sdata_running(sdata))
1994                                 drv_remove_interface(local, sdata);
1995                 ieee80211_handle_reconfig_failure(local);
1996                 return res;
1997         }
1998
1999         /* add channel contexts */
2000         if (local->use_chanctx) {
2001                 mutex_lock(&local->chanctx_mtx);
2002                 list_for_each_entry(ctx, &local->chanctx_list, list)
2003                         if (ctx->replace_state !=
2004                             IEEE80211_CHANCTX_REPLACES_OTHER)
2005                                 WARN_ON(drv_add_chanctx(local, ctx));
2006                 mutex_unlock(&local->chanctx_mtx);
2007
2008                 sdata = rtnl_dereference(local->monitor_sdata);
2009                 if (sdata && ieee80211_sdata_running(sdata))
2010                         ieee80211_assign_chanctx(local, sdata);
2011         }
2012
2013         /* reconfigure hardware */
2014         ieee80211_hw_config(local, ~0);
2015
2016         ieee80211_configure_filter(local);
2017
2018         /* Finally also reconfigure all the BSS information */
2019         list_for_each_entry(sdata, &local->interfaces, list) {
2020                 u32 changed;
2021
2022                 if (!ieee80211_sdata_running(sdata))
2023                         continue;
2024
2025                 ieee80211_assign_chanctx(local, sdata);
2026
2027                 switch (sdata->vif.type) {
2028                 case NL80211_IFTYPE_AP_VLAN:
2029                 case NL80211_IFTYPE_MONITOR:
2030                         break;
2031                 case NL80211_IFTYPE_ADHOC:
2032                         if (sdata->vif.bss_conf.ibss_joined)
2033                                 WARN_ON(drv_join_ibss(local, sdata));
2034                         /* fall through */
2035                 default:
2036                         ieee80211_reconfig_stations(sdata);
2037                         /* fall through */
2038                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2039                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2040                                 drv_conf_tx(local, sdata, i,
2041                                             &sdata->tx_conf[i]);
2042                         break;
2043                 }
2044
2045                 /* common change flags for all interface types */
2046                 changed = BSS_CHANGED_ERP_CTS_PROT |
2047                           BSS_CHANGED_ERP_PREAMBLE |
2048                           BSS_CHANGED_ERP_SLOT |
2049                           BSS_CHANGED_HT |
2050                           BSS_CHANGED_BASIC_RATES |
2051                           BSS_CHANGED_BEACON_INT |
2052                           BSS_CHANGED_BSSID |
2053                           BSS_CHANGED_CQM |
2054                           BSS_CHANGED_QOS |
2055                           BSS_CHANGED_IDLE |
2056                           BSS_CHANGED_TXPOWER |
2057                           BSS_CHANGED_MCAST_RATE;
2058
2059                 if (sdata->vif.mu_mimo_owner)
2060                         changed |= BSS_CHANGED_MU_GROUPS;
2061
2062                 switch (sdata->vif.type) {
2063                 case NL80211_IFTYPE_STATION:
2064                         changed |= BSS_CHANGED_ASSOC |
2065                                    BSS_CHANGED_ARP_FILTER |
2066                                    BSS_CHANGED_PS;
2067
2068                         /* Re-send beacon info report to the driver */
2069                         if (sdata->u.mgd.have_beacon)
2070                                 changed |= BSS_CHANGED_BEACON_INFO;
2071
2072                         if (sdata->vif.bss_conf.max_idle_period ||
2073                             sdata->vif.bss_conf.protected_keep_alive)
2074                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2075
2076                         sdata_lock(sdata);
2077                         ieee80211_bss_info_change_notify(sdata, changed);
2078                         sdata_unlock(sdata);
2079                         break;
2080                 case NL80211_IFTYPE_OCB:
2081                         changed |= BSS_CHANGED_OCB;
2082                         ieee80211_bss_info_change_notify(sdata, changed);
2083                         break;
2084                 case NL80211_IFTYPE_ADHOC:
2085                         changed |= BSS_CHANGED_IBSS;
2086                         /* fall through */
2087                 case NL80211_IFTYPE_AP:
2088                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2089
2090                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2091                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2092
2093                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2094                                         drv_start_ap(local, sdata);
2095                         }
2096
2097                         /* fall through */
2098                 case NL80211_IFTYPE_MESH_POINT:
2099                         if (sdata->vif.bss_conf.enable_beacon) {
2100                                 changed |= BSS_CHANGED_BEACON |
2101                                            BSS_CHANGED_BEACON_ENABLED;
2102                                 ieee80211_bss_info_change_notify(sdata, changed);
2103                         }
2104                         break;
2105                 case NL80211_IFTYPE_NAN:
2106                         res = ieee80211_reconfig_nan(sdata);
2107                         if (res < 0) {
2108                                 ieee80211_handle_reconfig_failure(local);
2109                                 return res;
2110                         }
2111                         break;
2112                 case NL80211_IFTYPE_WDS:
2113                 case NL80211_IFTYPE_AP_VLAN:
2114                 case NL80211_IFTYPE_MONITOR:
2115                 case NL80211_IFTYPE_P2P_DEVICE:
2116                         /* nothing to do */
2117                         break;
2118                 case NL80211_IFTYPE_UNSPECIFIED:
2119                 case NUM_NL80211_IFTYPES:
2120                 case NL80211_IFTYPE_P2P_CLIENT:
2121                 case NL80211_IFTYPE_P2P_GO:
2122                         WARN_ON(1);
2123                         break;
2124                 }
2125         }
2126
2127         ieee80211_recalc_ps(local);
2128
2129         /*
2130          * The sta might be in psm against the ap (e.g. because
2131          * this was the state before a hw restart), so we
2132          * explicitly send a null packet in order to make sure
2133          * it'll sync against the ap (and get out of psm).
2134          */
2135         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2136                 list_for_each_entry(sdata, &local->interfaces, list) {
2137                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2138                                 continue;
2139                         if (!sdata->u.mgd.associated)
2140                                 continue;
2141
2142                         ieee80211_send_nullfunc(local, sdata, false);
2143                 }
2144         }
2145
2146         /* APs are now beaconing, add back stations */
2147         mutex_lock(&local->sta_mtx);
2148         list_for_each_entry(sta, &local->sta_list, list) {
2149                 enum ieee80211_sta_state state;
2150
2151                 if (!sta->uploaded)
2152                         continue;
2153
2154                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2155                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2156                         continue;
2157
2158                 for (state = IEEE80211_STA_NOTEXIST;
2159                      state < sta->sta_state; state++)
2160                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2161                                               state + 1));
2162         }
2163         mutex_unlock(&local->sta_mtx);
2164
2165         /* add back keys */
2166         list_for_each_entry(sdata, &local->interfaces, list)
2167                 ieee80211_reset_crypto_tx_tailroom(sdata);
2168
2169         list_for_each_entry(sdata, &local->interfaces, list)
2170                 if (ieee80211_sdata_running(sdata))
2171                         ieee80211_enable_keys(sdata);
2172
2173         /* Reconfigure sched scan if it was interrupted by FW restart */
2174         mutex_lock(&local->mtx);
2175         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2176                                                 lockdep_is_held(&local->mtx));
2177         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2178                                                 lockdep_is_held(&local->mtx));
2179         if (sched_scan_sdata && sched_scan_req)
2180                 /*
2181                  * Sched scan stopped, but we don't want to report it. Instead,
2182                  * we're trying to reschedule. However, if more than one scan
2183                  * plan was set, we cannot reschedule since we don't know which
2184                  * scan plan was currently running (and some scan plans may have
2185                  * already finished).
2186                  */
2187                 if (sched_scan_req->n_scan_plans > 1 ||
2188                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2189                                                          sched_scan_req)) {
2190                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2191                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2192                         sched_scan_stopped = true;
2193                 }
2194         mutex_unlock(&local->mtx);
2195
2196         if (sched_scan_stopped)
2197                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2198
2199  wake_up:
2200
2201         if (local->monitors == local->open_count && local->monitors > 0)
2202                 ieee80211_add_virtual_monitor(local);
2203
2204         /*
2205          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2206          * sessions can be established after a resume.
2207          *
2208          * Also tear down aggregation sessions since reconfiguring
2209          * them in a hardware restart scenario is not easily done
2210          * right now, and the hardware will have lost information
2211          * about the sessions, but we and the AP still think they
2212          * are active. This is really a workaround though.
2213          */
2214         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2215                 mutex_lock(&local->sta_mtx);
2216
2217                 list_for_each_entry(sta, &local->sta_list, list) {
2218                         if (!local->resuming)
2219                                 ieee80211_sta_tear_down_BA_sessions(
2220                                                 sta, AGG_STOP_LOCAL_REQUEST);
2221                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2222                 }
2223
2224                 mutex_unlock(&local->sta_mtx);
2225         }
2226
2227         if (local->in_reconfig) {
2228                 local->in_reconfig = false;
2229                 barrier();
2230
2231                 /* Restart deferred ROCs */
2232                 mutex_lock(&local->mtx);
2233                 ieee80211_start_next_roc(local);
2234                 mutex_unlock(&local->mtx);
2235
2236                 /* Requeue all works */
2237                 list_for_each_entry(sdata, &local->interfaces, list)
2238                         ieee80211_queue_work(&local->hw, &sdata->work);
2239         }
2240
2241         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2242                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2243                                         false);
2244
2245         /*
2246          * If this is for hw restart things are still running.
2247          * We may want to change that later, however.
2248          */
2249         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2250                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2251
2252         if (!suspended)
2253                 return 0;
2254
2255 #ifdef CONFIG_PM
2256         /* first set suspended false, then resuming */
2257         local->suspended = false;
2258         mb();
2259         local->resuming = false;
2260
2261         ieee80211_flush_completed_scan(local, false);
2262
2263         if (local->open_count && !reconfig_due_to_wowlan)
2264                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2265
2266         list_for_each_entry(sdata, &local->interfaces, list) {
2267                 if (!ieee80211_sdata_running(sdata))
2268                         continue;
2269                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2270                         ieee80211_sta_restart(sdata);
2271         }
2272
2273         mod_timer(&local->sta_cleanup, jiffies + 1);
2274 #else
2275         WARN_ON(1);
2276 #endif
2277
2278         return 0;
2279 }
2280
2281 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2282 {
2283         struct ieee80211_sub_if_data *sdata;
2284         struct ieee80211_local *local;
2285         struct ieee80211_key *key;
2286
2287         if (WARN_ON(!vif))
2288                 return;
2289
2290         sdata = vif_to_sdata(vif);
2291         local = sdata->local;
2292
2293         if (WARN_ON(!local->resuming))
2294                 return;
2295
2296         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2297                 return;
2298
2299         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2300
2301         mutex_lock(&local->key_mtx);
2302         list_for_each_entry(key, &sdata->key_list, list)
2303                 key->flags |= KEY_FLAG_TAINTED;
2304         mutex_unlock(&local->key_mtx);
2305 }
2306 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2307
2308 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2309 {
2310         struct ieee80211_local *local = sdata->local;
2311         struct ieee80211_chanctx_conf *chanctx_conf;
2312         struct ieee80211_chanctx *chanctx;
2313
2314         mutex_lock(&local->chanctx_mtx);
2315
2316         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2317                                         lockdep_is_held(&local->chanctx_mtx));
2318
2319         /*
2320          * This function can be called from a work, thus it may be possible
2321          * that the chanctx_conf is removed (due to a disconnection, for
2322          * example).
2323          * So nothing should be done in such case.
2324          */
2325         if (!chanctx_conf)
2326                 goto unlock;
2327
2328         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2329         ieee80211_recalc_smps_chanctx(local, chanctx);
2330  unlock:
2331         mutex_unlock(&local->chanctx_mtx);
2332 }
2333
2334 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2335 {
2336         struct ieee80211_local *local = sdata->local;
2337         struct ieee80211_chanctx_conf *chanctx_conf;
2338         struct ieee80211_chanctx *chanctx;
2339
2340         mutex_lock(&local->chanctx_mtx);
2341
2342         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2343                                         lockdep_is_held(&local->chanctx_mtx));
2344
2345         if (WARN_ON_ONCE(!chanctx_conf))
2346                 goto unlock;
2347
2348         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2349         ieee80211_recalc_chanctx_min_def(local, chanctx);
2350  unlock:
2351         mutex_unlock(&local->chanctx_mtx);
2352 }
2353
2354 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2355 {
2356         size_t pos = offset;
2357
2358         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2359                 pos += 2 + ies[pos + 1];
2360
2361         return pos;
2362 }
2363
2364 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2365                                             int rssi_min_thold,
2366                                             int rssi_max_thold)
2367 {
2368         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2369
2370         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2371                 return;
2372
2373         /*
2374          * Scale up threshold values before storing it, as the RSSI averaging
2375          * algorithm uses a scaled up value as well. Change this scaling
2376          * factor if the RSSI averaging algorithm changes.
2377          */
2378         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2379         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2380 }
2381
2382 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2383                                     int rssi_min_thold,
2384                                     int rssi_max_thold)
2385 {
2386         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2387
2388         WARN_ON(rssi_min_thold == rssi_max_thold ||
2389                 rssi_min_thold > rssi_max_thold);
2390
2391         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2392                                        rssi_max_thold);
2393 }
2394 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2395
2396 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2397 {
2398         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2399
2400         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2401 }
2402 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2403
2404 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2405                               u16 cap)
2406 {
2407         __le16 tmp;
2408
2409         *pos++ = WLAN_EID_HT_CAPABILITY;
2410         *pos++ = sizeof(struct ieee80211_ht_cap);
2411         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2412
2413         /* capability flags */
2414         tmp = cpu_to_le16(cap);
2415         memcpy(pos, &tmp, sizeof(u16));
2416         pos += sizeof(u16);
2417
2418         /* AMPDU parameters */
2419         *pos++ = ht_cap->ampdu_factor |
2420                  (ht_cap->ampdu_density <<
2421                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2422
2423         /* MCS set */
2424         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2425         pos += sizeof(ht_cap->mcs);
2426
2427         /* extended capabilities */
2428         pos += sizeof(__le16);
2429
2430         /* BF capabilities */
2431         pos += sizeof(__le32);
2432
2433         /* antenna selection */
2434         pos += sizeof(u8);
2435
2436         return pos;
2437 }
2438
2439 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2440                                u32 cap)
2441 {
2442         __le32 tmp;
2443
2444         *pos++ = WLAN_EID_VHT_CAPABILITY;
2445         *pos++ = sizeof(struct ieee80211_vht_cap);
2446         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2447
2448         /* capability flags */
2449         tmp = cpu_to_le32(cap);
2450         memcpy(pos, &tmp, sizeof(u32));
2451         pos += sizeof(u32);
2452
2453         /* VHT MCS set */
2454         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2455         pos += sizeof(vht_cap->vht_mcs);
2456
2457         return pos;
2458 }
2459
2460 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2461                               const struct ieee80211_sta_he_cap *he_cap,
2462                               u8 *end)
2463 {
2464         u8 n;
2465         u8 ie_len;
2466         u8 *orig_pos = pos;
2467
2468         /* Make sure we have place for the IE */
2469         /*
2470          * TODO: the 1 added is because this temporarily is under the EXTENSION
2471          * IE. Get rid of it when it moves.
2472          */
2473         if (!he_cap)
2474                 return orig_pos;
2475
2476         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2477         ie_len = 2 + 1 +
2478                  sizeof(he_cap->he_cap_elem) + n +
2479                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2480                                        he_cap->he_cap_elem.phy_cap_info);
2481
2482         if ((end - pos) < ie_len)
2483                 return orig_pos;
2484
2485         *pos++ = WLAN_EID_EXTENSION;
2486         pos++; /* We'll set the size later below */
2487         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2488
2489         /* Fixed data */
2490         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2491         pos += sizeof(he_cap->he_cap_elem);
2492
2493         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2494         pos += n;
2495
2496         /* Check if PPE Threshold should be present */
2497         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2498              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2499                 goto end;
2500
2501         /*
2502          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2503          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2504          */
2505         n = hweight8(he_cap->ppe_thres[0] &
2506                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2507         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2508                    IEEE80211_PPE_THRES_NSS_POS));
2509
2510         /*
2511          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2512          * total size.
2513          */
2514         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2515         n = DIV_ROUND_UP(n, 8);
2516
2517         /* Copy PPE Thresholds */
2518         memcpy(pos, &he_cap->ppe_thres, n);
2519         pos += n;
2520
2521 end:
2522         orig_pos[1] = (pos - orig_pos) - 2;
2523         return pos;
2524 }
2525
2526 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2527                                const struct cfg80211_chan_def *chandef,
2528                                u16 prot_mode, bool rifs_mode)
2529 {
2530         struct ieee80211_ht_operation *ht_oper;
2531         /* Build HT Information */
2532         *pos++ = WLAN_EID_HT_OPERATION;
2533         *pos++ = sizeof(struct ieee80211_ht_operation);
2534         ht_oper = (struct ieee80211_ht_operation *)pos;
2535         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2536                                         chandef->chan->center_freq);
2537         switch (chandef->width) {
2538         case NL80211_CHAN_WIDTH_160:
2539         case NL80211_CHAN_WIDTH_80P80:
2540         case NL80211_CHAN_WIDTH_80:
2541         case NL80211_CHAN_WIDTH_40:
2542                 if (chandef->center_freq1 > chandef->chan->center_freq)
2543                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2544                 else
2545                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2546                 break;
2547         default:
2548                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2549                 break;
2550         }
2551         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2552             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2553             chandef->width != NL80211_CHAN_WIDTH_20)
2554                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2555
2556         if (rifs_mode)
2557                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2558
2559         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2560         ht_oper->stbc_param = 0x0000;
2561
2562         /* It seems that Basic MCS set and Supported MCS set
2563            are identical for the first 10 bytes */
2564         memset(&ht_oper->basic_set, 0, 16);
2565         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2566
2567         return pos + sizeof(struct ieee80211_ht_operation);
2568 }
2569
2570 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2571                                    const struct cfg80211_chan_def *chandef)
2572 {
2573         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2574         *pos++ = 3;                                     /* IE length */
2575         /* New channel width */
2576         switch (chandef->width) {
2577         case NL80211_CHAN_WIDTH_80:
2578                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2579                 break;
2580         case NL80211_CHAN_WIDTH_160:
2581                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2582                 break;
2583         case NL80211_CHAN_WIDTH_80P80:
2584                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2585                 break;
2586         default:
2587                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2588         }
2589
2590         /* new center frequency segment 0 */
2591         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2592         /* new center frequency segment 1 */
2593         if (chandef->center_freq2)
2594                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2595         else
2596                 *pos++ = 0;
2597 }
2598
2599 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2600                                 const struct cfg80211_chan_def *chandef)
2601 {
2602         struct ieee80211_vht_operation *vht_oper;
2603
2604         *pos++ = WLAN_EID_VHT_OPERATION;
2605         *pos++ = sizeof(struct ieee80211_vht_operation);
2606         vht_oper = (struct ieee80211_vht_operation *)pos;
2607         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2608                                                         chandef->center_freq1);
2609         if (chandef->center_freq2)
2610                 vht_oper->center_freq_seg1_idx =
2611                         ieee80211_frequency_to_channel(chandef->center_freq2);
2612         else
2613                 vht_oper->center_freq_seg1_idx = 0x00;
2614
2615         switch (chandef->width) {
2616         case NL80211_CHAN_WIDTH_160:
2617                 /*
2618                  * Convert 160 MHz channel width to new style as interop
2619                  * workaround.
2620                  */
2621                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2622                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2623                 if (chandef->chan->center_freq < chandef->center_freq1)
2624                         vht_oper->center_freq_seg0_idx -= 8;
2625                 else
2626                         vht_oper->center_freq_seg0_idx += 8;
2627                 break;
2628         case NL80211_CHAN_WIDTH_80P80:
2629                 /*
2630                  * Convert 80+80 MHz channel width to new style as interop
2631                  * workaround.
2632                  */
2633                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2634                 break;
2635         case NL80211_CHAN_WIDTH_80:
2636                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2637                 break;
2638         default:
2639                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2640                 break;
2641         }
2642
2643         /* don't require special VHT peer rates */
2644         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2645
2646         return pos + sizeof(struct ieee80211_vht_operation);
2647 }
2648
2649 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2650                                struct cfg80211_chan_def *chandef)
2651 {
2652         enum nl80211_channel_type channel_type;
2653
2654         if (!ht_oper)
2655                 return false;
2656
2657         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2658         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2659                 channel_type = NL80211_CHAN_HT20;
2660                 break;
2661         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2662                 channel_type = NL80211_CHAN_HT40PLUS;
2663                 break;
2664         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2665                 channel_type = NL80211_CHAN_HT40MINUS;
2666                 break;
2667         default:
2668                 channel_type = NL80211_CHAN_NO_HT;
2669                 return false;
2670         }
2671
2672         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2673         return true;
2674 }
2675
2676 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2677                                 struct cfg80211_chan_def *chandef)
2678 {
2679         struct cfg80211_chan_def new = *chandef;
2680         int cf1, cf2;
2681
2682         if (!oper)
2683                 return false;
2684
2685         cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2686                                              chandef->chan->band);
2687         cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2688                                              chandef->chan->band);
2689
2690         switch (oper->chan_width) {
2691         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2692                 break;
2693         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2694                 new.width = NL80211_CHAN_WIDTH_80;
2695                 new.center_freq1 = cf1;
2696                 /* If needed, adjust based on the newer interop workaround. */
2697                 if (oper->center_freq_seg1_idx) {
2698                         unsigned int diff;
2699
2700                         diff = abs(oper->center_freq_seg1_idx -
2701                                    oper->center_freq_seg0_idx);
2702                         if (diff == 8) {
2703                                 new.width = NL80211_CHAN_WIDTH_160;
2704                                 new.center_freq1 = cf2;
2705                         } else if (diff > 8) {
2706                                 new.width = NL80211_CHAN_WIDTH_80P80;
2707                                 new.center_freq2 = cf2;
2708                         }
2709                 }
2710                 break;
2711         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2712                 new.width = NL80211_CHAN_WIDTH_160;
2713                 new.center_freq1 = cf1;
2714                 break;
2715         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2716                 new.width = NL80211_CHAN_WIDTH_80P80;
2717                 new.center_freq1 = cf1;
2718                 new.center_freq2 = cf2;
2719                 break;
2720         default:
2721                 return false;
2722         }
2723
2724         if (!cfg80211_chandef_valid(&new))
2725                 return false;
2726
2727         *chandef = new;
2728         return true;
2729 }
2730
2731 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2732                              const struct ieee80211_supported_band *sband,
2733                              const u8 *srates, int srates_len, u32 *rates)
2734 {
2735         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2736         int shift = ieee80211_chandef_get_shift(chandef);
2737         struct ieee80211_rate *br;
2738         int brate, rate, i, j, count = 0;
2739
2740         *rates = 0;
2741
2742         for (i = 0; i < srates_len; i++) {
2743                 rate = srates[i] & 0x7f;
2744
2745                 for (j = 0; j < sband->n_bitrates; j++) {
2746                         br = &sband->bitrates[j];
2747                         if ((rate_flags & br->flags) != rate_flags)
2748                                 continue;
2749
2750                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2751                         if (brate == rate) {
2752                                 *rates |= BIT(j);
2753                                 count++;
2754                                 break;
2755                         }
2756                 }
2757         }
2758         return count;
2759 }
2760
2761 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2762                             struct sk_buff *skb, bool need_basic,
2763                             enum nl80211_band band)
2764 {
2765         struct ieee80211_local *local = sdata->local;
2766         struct ieee80211_supported_band *sband;
2767         int rate, shift;
2768         u8 i, rates, *pos;
2769         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2770         u32 rate_flags;
2771
2772         shift = ieee80211_vif_get_shift(&sdata->vif);
2773         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2774         sband = local->hw.wiphy->bands[band];
2775         rates = 0;
2776         for (i = 0; i < sband->n_bitrates; i++) {
2777                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2778                         continue;
2779                 rates++;
2780         }
2781         if (rates > 8)
2782                 rates = 8;
2783
2784         if (skb_tailroom(skb) < rates + 2)
2785                 return -ENOMEM;
2786
2787         pos = skb_put(skb, rates + 2);
2788         *pos++ = WLAN_EID_SUPP_RATES;
2789         *pos++ = rates;
2790         for (i = 0; i < rates; i++) {
2791                 u8 basic = 0;
2792                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2793                         continue;
2794
2795                 if (need_basic && basic_rates & BIT(i))
2796                         basic = 0x80;
2797                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2798                                     5 * (1 << shift));
2799                 *pos++ = basic | (u8) rate;
2800         }
2801
2802         return 0;
2803 }
2804
2805 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2806                                 struct sk_buff *skb, bool need_basic,
2807                                 enum nl80211_band band)
2808 {
2809         struct ieee80211_local *local = sdata->local;
2810         struct ieee80211_supported_band *sband;
2811         int rate, shift;
2812         u8 i, exrates, *pos;
2813         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2814         u32 rate_flags;
2815
2816         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2817         shift = ieee80211_vif_get_shift(&sdata->vif);
2818
2819         sband = local->hw.wiphy->bands[band];
2820         exrates = 0;
2821         for (i = 0; i < sband->n_bitrates; i++) {
2822                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2823                         continue;
2824                 exrates++;
2825         }
2826
2827         if (exrates > 8)
2828                 exrates -= 8;
2829         else
2830                 exrates = 0;
2831
2832         if (skb_tailroom(skb) < exrates + 2)
2833                 return -ENOMEM;
2834
2835         if (exrates) {
2836                 pos = skb_put(skb, exrates + 2);
2837                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2838                 *pos++ = exrates;
2839                 for (i = 8; i < sband->n_bitrates; i++) {
2840                         u8 basic = 0;
2841                         if ((rate_flags & sband->bitrates[i].flags)
2842                             != rate_flags)
2843                                 continue;
2844                         if (need_basic && basic_rates & BIT(i))
2845                                 basic = 0x80;
2846                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2847                                             5 * (1 << shift));
2848                         *pos++ = basic | (u8) rate;
2849                 }
2850         }
2851         return 0;
2852 }
2853
2854 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2855 {
2856         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2857         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2858
2859         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2860                 /* non-managed type inferfaces */
2861                 return 0;
2862         }
2863         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2864 }
2865 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2866
2867 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2868 {
2869         if (!mcs)
2870                 return 1;
2871
2872         /* TODO: consider rx_highest */
2873
2874         if (mcs->rx_mask[3])
2875                 return 4;
2876         if (mcs->rx_mask[2])
2877                 return 3;
2878         if (mcs->rx_mask[1])
2879                 return 2;
2880         return 1;
2881 }
2882
2883 /**
2884  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2885  * @local: mac80211 hw info struct
2886  * @status: RX status
2887  * @mpdu_len: total MPDU length (including FCS)
2888  * @mpdu_offset: offset into MPDU to calculate timestamp at
2889  *
2890  * This function calculates the RX timestamp at the given MPDU offset, taking
2891  * into account what the RX timestamp was. An offset of 0 will just normalize
2892  * the timestamp to TSF at beginning of MPDU reception.
2893  */
2894 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2895                                      struct ieee80211_rx_status *status,
2896                                      unsigned int mpdu_len,
2897                                      unsigned int mpdu_offset)
2898 {
2899         u64 ts = status->mactime;
2900         struct rate_info ri;
2901         u16 rate;
2902
2903         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2904                 return 0;
2905
2906         memset(&ri, 0, sizeof(ri));
2907
2908         ri.bw = status->bw;
2909
2910         /* Fill cfg80211 rate info */
2911         switch (status->encoding) {
2912         case RX_ENC_HT:
2913                 ri.mcs = status->rate_idx;
2914                 ri.flags |= RATE_INFO_FLAGS_MCS;
2915                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2916                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2917                 break;
2918         case RX_ENC_VHT:
2919                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2920                 ri.mcs = status->rate_idx;
2921                 ri.nss = status->nss;
2922                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2923                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2924                 break;
2925         default:
2926                 WARN_ON(1);
2927                 /* fall through */
2928         case RX_ENC_LEGACY: {
2929                 struct ieee80211_supported_band *sband;
2930                 int shift = 0;
2931                 int bitrate;
2932
2933                 switch (status->bw) {
2934                 case RATE_INFO_BW_10:
2935                         shift = 1;
2936                         break;
2937                 case RATE_INFO_BW_5:
2938                         shift = 2;
2939                         break;
2940                 }
2941
2942                 sband = local->hw.wiphy->bands[status->band];
2943                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2944                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2945
2946                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2947                         /* TODO: handle HT/VHT preambles */
2948                         if (status->band == NL80211_BAND_5GHZ) {
2949                                 ts += 20 << shift;
2950                                 mpdu_offset += 2;
2951                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2952                                 ts += 96;
2953                         } else {
2954                                 ts += 192;
2955                         }
2956                 }
2957                 break;
2958                 }
2959         }
2960
2961         rate = cfg80211_calculate_bitrate(&ri);
2962         if (WARN_ONCE(!rate,
2963                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2964                       (unsigned long long)status->flag, status->rate_idx,
2965                       status->nss))
2966                 return 0;
2967
2968         /* rewind from end of MPDU */
2969         if (status->flag & RX_FLAG_MACTIME_END)
2970                 ts -= mpdu_len * 8 * 10 / rate;
2971
2972         ts += mpdu_offset * 8 * 10 / rate;
2973
2974         return ts;
2975 }
2976
2977 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2978 {
2979         struct ieee80211_sub_if_data *sdata;
2980         struct cfg80211_chan_def chandef;
2981
2982         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2983         ASSERT_RTNL();
2984
2985         mutex_lock(&local->mtx);
2986         list_for_each_entry(sdata, &local->interfaces, list) {
2987                 /* it might be waiting for the local->mtx, but then
2988                  * by the time it gets it, sdata->wdev.cac_started
2989                  * will no longer be true
2990                  */
2991                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2992
2993                 if (sdata->wdev.cac_started) {
2994                         chandef = sdata->vif.bss_conf.chandef;
2995                         ieee80211_vif_release_channel(sdata);
2996                         cfg80211_cac_event(sdata->dev,
2997                                            &chandef,
2998                                            NL80211_RADAR_CAC_ABORTED,
2999                                            GFP_KERNEL);
3000                 }
3001         }
3002         mutex_unlock(&local->mtx);
3003 }
3004
3005 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3006 {
3007         struct ieee80211_local *local =
3008                 container_of(work, struct ieee80211_local, radar_detected_work);
3009         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3010         struct ieee80211_chanctx *ctx;
3011         int num_chanctx = 0;
3012
3013         mutex_lock(&local->chanctx_mtx);
3014         list_for_each_entry(ctx, &local->chanctx_list, list) {
3015                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3016                         continue;
3017
3018                 num_chanctx++;
3019                 chandef = ctx->conf.def;
3020         }
3021         mutex_unlock(&local->chanctx_mtx);
3022
3023         rtnl_lock();
3024         ieee80211_dfs_cac_cancel(local);
3025         rtnl_unlock();
3026
3027         if (num_chanctx > 1)
3028                 /* XXX: multi-channel is not supported yet */
3029                 WARN_ON(1);
3030         else
3031                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3032 }
3033
3034 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3035 {
3036         struct ieee80211_local *local = hw_to_local(hw);
3037
3038         trace_api_radar_detected(local);
3039
3040         schedule_work(&local->radar_detected_work);
3041 }
3042 EXPORT_SYMBOL(ieee80211_radar_detected);
3043
3044 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3045 {
3046         u32 ret;
3047         int tmp;
3048
3049         switch (c->width) {
3050         case NL80211_CHAN_WIDTH_20:
3051                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3052                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3053                 break;
3054         case NL80211_CHAN_WIDTH_40:
3055                 c->width = NL80211_CHAN_WIDTH_20;
3056                 c->center_freq1 = c->chan->center_freq;
3057                 ret = IEEE80211_STA_DISABLE_40MHZ |
3058                       IEEE80211_STA_DISABLE_VHT;
3059                 break;
3060         case NL80211_CHAN_WIDTH_80:
3061                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3062                 /* n_P40 */
3063                 tmp /= 2;
3064                 /* freq_P40 */
3065                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3066                 c->width = NL80211_CHAN_WIDTH_40;
3067                 ret = IEEE80211_STA_DISABLE_VHT;
3068                 break;
3069         case NL80211_CHAN_WIDTH_80P80:
3070                 c->center_freq2 = 0;
3071                 c->width = NL80211_CHAN_WIDTH_80;
3072                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3073                       IEEE80211_STA_DISABLE_160MHZ;
3074                 break;
3075         case NL80211_CHAN_WIDTH_160:
3076                 /* n_P20 */
3077                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3078                 /* n_P80 */
3079                 tmp /= 4;
3080                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3081                 c->width = NL80211_CHAN_WIDTH_80;
3082                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3083                       IEEE80211_STA_DISABLE_160MHZ;
3084                 break;
3085         default:
3086         case NL80211_CHAN_WIDTH_20_NOHT:
3087                 WARN_ON_ONCE(1);
3088                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3089                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3090                 break;
3091         case NL80211_CHAN_WIDTH_5:
3092         case NL80211_CHAN_WIDTH_10:
3093                 WARN_ON_ONCE(1);
3094                 /* keep c->width */
3095                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3096                 break;
3097         }
3098
3099         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3100
3101         return ret;
3102 }
3103
3104 /*
3105  * Returns true if smps_mode_new is strictly more restrictive than
3106  * smps_mode_old.
3107  */
3108 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3109                                    enum ieee80211_smps_mode smps_mode_new)
3110 {
3111         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3112                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3113                 return false;
3114
3115         switch (smps_mode_old) {
3116         case IEEE80211_SMPS_STATIC:
3117                 return false;
3118         case IEEE80211_SMPS_DYNAMIC:
3119                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3120         case IEEE80211_SMPS_OFF:
3121                 return smps_mode_new != IEEE80211_SMPS_OFF;
3122         default:
3123                 WARN_ON(1);
3124         }
3125
3126         return false;
3127 }
3128
3129 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3130                               struct cfg80211_csa_settings *csa_settings)
3131 {
3132         struct sk_buff *skb;
3133         struct ieee80211_mgmt *mgmt;
3134         struct ieee80211_local *local = sdata->local;
3135         int freq;
3136         int hdr_len = offsetofend(struct ieee80211_mgmt,
3137                                   u.action.u.chan_switch);
3138         u8 *pos;
3139
3140         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3141             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3142                 return -EOPNOTSUPP;
3143
3144         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3145                             5 + /* channel switch announcement element */
3146                             3 + /* secondary channel offset element */
3147                             5 + /* wide bandwidth channel switch announcement */
3148                             8); /* mesh channel switch parameters element */
3149         if (!skb)
3150                 return -ENOMEM;
3151
3152         skb_reserve(skb, local->tx_headroom);
3153         mgmt = skb_put_zero(skb, hdr_len);
3154         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3155                                           IEEE80211_STYPE_ACTION);
3156
3157         eth_broadcast_addr(mgmt->da);
3158         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3159         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3160                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3161         } else {
3162                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3163                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3164         }
3165         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3166         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3167         pos = skb_put(skb, 5);
3168         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3169         *pos++ = 3;                                             /* IE length */
3170         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3171         freq = csa_settings->chandef.chan->center_freq;
3172         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3173         *pos++ = csa_settings->count;                           /* count */
3174
3175         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3176                 enum nl80211_channel_type ch_type;
3177
3178                 skb_put(skb, 3);
3179                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3180                 *pos++ = 1;                                     /* IE length */
3181                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3182                 if (ch_type == NL80211_CHAN_HT40PLUS)
3183                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3184                 else
3185                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3186         }
3187
3188         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3189                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3190
3191                 skb_put(skb, 8);
3192                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3193                 *pos++ = 6;                                     /* IE length */
3194                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3195                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3196                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3197                 *pos++ |= csa_settings->block_tx ?
3198                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3199                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3200                 pos += 2;
3201                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3202                 pos += 2;
3203         }
3204
3205         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3206             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3207             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3208                 skb_put(skb, 5);
3209                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3210         }
3211
3212         ieee80211_tx_skb(sdata, skb);
3213         return 0;
3214 }
3215
3216 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3217 {
3218         return !(cs == NULL || cs->cipher == 0 ||
3219                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3220                  cs->hdr_len <= cs->key_idx_off ||
3221                  cs->key_idx_shift > 7 ||
3222                  cs->key_idx_mask == 0);
3223 }
3224
3225 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3226 {
3227         int i;
3228
3229         /* Ensure we have enough iftype bitmap space for all iftype values */
3230         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3231
3232         for (i = 0; i < n; i++)
3233                 if (!ieee80211_cs_valid(&cs[i]))
3234                         return false;
3235
3236         return true;
3237 }
3238
3239 const struct ieee80211_cipher_scheme *
3240 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3241                  enum nl80211_iftype iftype)
3242 {
3243         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3244         int n = local->hw.n_cipher_schemes;
3245         int i;
3246         const struct ieee80211_cipher_scheme *cs = NULL;
3247
3248         for (i = 0; i < n; i++) {
3249                 if (l[i].cipher == cipher) {
3250                         cs = &l[i];
3251                         break;
3252                 }
3253         }
3254
3255         if (!cs || !(cs->iftype & BIT(iftype)))
3256                 return NULL;
3257
3258         return cs;
3259 }
3260
3261 int ieee80211_cs_headroom(struct ieee80211_local *local,
3262                           struct cfg80211_crypto_settings *crypto,
3263                           enum nl80211_iftype iftype)
3264 {
3265         const struct ieee80211_cipher_scheme *cs;
3266         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3267         int i;
3268
3269         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3270                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3271                                       iftype);
3272
3273                 if (cs && headroom < cs->hdr_len)
3274                         headroom = cs->hdr_len;
3275         }
3276
3277         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3278         if (cs && headroom < cs->hdr_len)
3279                 headroom = cs->hdr_len;
3280
3281         return headroom;
3282 }
3283
3284 static bool
3285 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3286 {
3287         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3288         int skip;
3289
3290         if (end > 0)
3291                 return false;
3292
3293         /* One shot NOA  */
3294         if (data->count[i] == 1)
3295                 return false;
3296
3297         if (data->desc[i].interval == 0)
3298                 return false;
3299
3300         /* End time is in the past, check for repetitions */
3301         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3302         if (data->count[i] < 255) {
3303                 if (data->count[i] <= skip) {
3304                         data->count[i] = 0;
3305                         return false;
3306                 }
3307
3308                 data->count[i] -= skip;
3309         }
3310
3311         data->desc[i].start += skip * data->desc[i].interval;
3312
3313         return true;
3314 }
3315
3316 static bool
3317 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3318                              s32 *offset)
3319 {
3320         bool ret = false;
3321         int i;
3322
3323         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3324                 s32 cur;
3325
3326                 if (!data->count[i])
3327                         continue;
3328
3329                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3330                         ret = true;
3331
3332                 cur = data->desc[i].start - tsf;
3333                 if (cur > *offset)
3334                         continue;
3335
3336                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3337                 if (cur > *offset)
3338                         *offset = cur;
3339         }
3340
3341         return ret;
3342 }
3343
3344 static u32
3345 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3346 {
3347         s32 offset = 0;
3348         int tries = 0;
3349         /*
3350          * arbitrary limit, used to avoid infinite loops when combined NoA
3351          * descriptors cover the full time period.
3352          */
3353         int max_tries = 5;
3354
3355         ieee80211_extend_absent_time(data, tsf, &offset);
3356         do {
3357                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3358                         break;
3359
3360                 tries++;
3361         } while (tries < max_tries);
3362
3363         return offset;
3364 }
3365
3366 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3367 {
3368         u32 next_offset = BIT(31) - 1;
3369         int i;
3370
3371         data->absent = 0;
3372         data->has_next_tsf = false;
3373         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3374                 s32 start;
3375
3376                 if (!data->count[i])
3377                         continue;
3378
3379                 ieee80211_extend_noa_desc(data, tsf, i);
3380                 start = data->desc[i].start - tsf;
3381                 if (start <= 0)
3382                         data->absent |= BIT(i);
3383
3384                 if (next_offset > start)
3385                         next_offset = start;
3386
3387                 data->has_next_tsf = true;
3388         }
3389
3390         if (data->absent)
3391                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3392
3393         data->next_tsf = tsf + next_offset;
3394 }
3395 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3396
3397 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3398                             struct ieee80211_noa_data *data, u32 tsf)
3399 {
3400         int ret = 0;
3401         int i;
3402
3403         memset(data, 0, sizeof(*data));
3404
3405         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3406                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3407
3408                 if (!desc->count || !desc->duration)
3409                         continue;
3410
3411                 data->count[i] = desc->count;
3412                 data->desc[i].start = le32_to_cpu(desc->start_time);
3413                 data->desc[i].duration = le32_to_cpu(desc->duration);
3414                 data->desc[i].interval = le32_to_cpu(desc->interval);
3415
3416                 if (data->count[i] > 1 &&
3417                     data->desc[i].interval < data->desc[i].duration)
3418                         continue;
3419
3420                 ieee80211_extend_noa_desc(data, tsf, i);
3421                 ret++;
3422         }
3423
3424         if (ret)
3425                 ieee80211_update_p2p_noa(data, tsf);
3426
3427         return ret;
3428 }
3429 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3430
3431 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3432                            struct ieee80211_sub_if_data *sdata)
3433 {
3434         u64 tsf = drv_get_tsf(local, sdata);
3435         u64 dtim_count = 0;
3436         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3437         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3438         struct ps_data *ps;
3439         u8 bcns_from_dtim;
3440
3441         if (tsf == -1ULL || !beacon_int || !dtim_period)
3442                 return;
3443
3444         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3445             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3446                 if (!sdata->bss)
3447                         return;
3448
3449                 ps = &sdata->bss->ps;
3450         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3451                 ps = &sdata->u.mesh.ps;
3452         } else {
3453                 return;
3454         }
3455
3456         /*
3457          * actually finds last dtim_count, mac80211 will update in
3458          * __beacon_add_tim().
3459          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3460          */
3461         do_div(tsf, beacon_int);
3462         bcns_from_dtim = do_div(tsf, dtim_period);
3463         /* just had a DTIM */
3464         if (!bcns_from_dtim)
3465                 dtim_count = 0;
3466         else
3467                 dtim_count = dtim_period - bcns_from_dtim;
3468
3469         ps->dtim_count = dtim_count;
3470 }
3471
3472 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3473                                          struct ieee80211_chanctx *ctx)
3474 {
3475         struct ieee80211_sub_if_data *sdata;
3476         u8 radar_detect = 0;
3477
3478         lockdep_assert_held(&local->chanctx_mtx);
3479
3480         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3481                 return 0;
3482
3483         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3484                 if (sdata->reserved_radar_required)
3485                         radar_detect |= BIT(sdata->reserved_chandef.width);
3486
3487         /*
3488          * An in-place reservation context should not have any assigned vifs
3489          * until it replaces the other context.
3490          */
3491         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3492                 !list_empty(&ctx->assigned_vifs));
3493
3494         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3495                 if (sdata->radar_required)
3496                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3497
3498         return radar_detect;
3499 }
3500
3501 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3502                                  const struct cfg80211_chan_def *chandef,
3503                                  enum ieee80211_chanctx_mode chanmode,
3504                                  u8 radar_detect)
3505 {
3506         struct ieee80211_local *local = sdata->local;
3507         struct ieee80211_sub_if_data *sdata_iter;
3508         enum nl80211_iftype iftype = sdata->wdev.iftype;
3509         struct ieee80211_chanctx *ctx;
3510         int total = 1;
3511         struct iface_combination_params params = {
3512                 .radar_detect = radar_detect,
3513         };
3514
3515         lockdep_assert_held(&local->chanctx_mtx);
3516
3517         if (WARN_ON(hweight32(radar_detect) > 1))
3518                 return -EINVAL;
3519
3520         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3521                     !chandef->chan))
3522                 return -EINVAL;
3523
3524         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3525                 return -EINVAL;
3526
3527         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3528             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3529                 /*
3530                  * always passing this is harmless, since it'll be the
3531                  * same value that cfg80211 finds if it finds the same
3532                  * interface ... and that's always allowed
3533                  */
3534                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3535         }
3536
3537         /* Always allow software iftypes */
3538         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3539                 if (radar_detect)
3540                         return -EINVAL;
3541                 return 0;
3542         }
3543
3544         if (chandef)
3545                 params.num_different_channels = 1;
3546
3547         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3548                 params.iftype_num[iftype] = 1;
3549
3550         list_for_each_entry(ctx, &local->chanctx_list, list) {
3551                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3552                         continue;
3553                 params.radar_detect |=
3554                         ieee80211_chanctx_radar_detect(local, ctx);
3555                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3556                         params.num_different_channels++;
3557                         continue;
3558                 }
3559                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3560                     cfg80211_chandef_compatible(chandef,
3561                                                 &ctx->conf.def))
3562                         continue;
3563                 params.num_different_channels++;
3564         }
3565
3566         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3567                 struct wireless_dev *wdev_iter;
3568
3569                 wdev_iter = &sdata_iter->wdev;
3570
3571                 if (sdata_iter == sdata ||
3572                     !ieee80211_sdata_running(sdata_iter) ||
3573                     cfg80211_iftype_allowed(local->hw.wiphy,
3574                                             wdev_iter->iftype, 0, 1))
3575                         continue;
3576
3577                 params.iftype_num[wdev_iter->iftype]++;
3578                 total++;
3579         }
3580
3581         if (total == 1 && !params.radar_detect)
3582                 return 0;
3583
3584         return cfg80211_check_combinations(local->hw.wiphy, &params);
3585 }
3586
3587 static void
3588 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3589                          void *data)
3590 {
3591         u32 *max_num_different_channels = data;
3592
3593         *max_num_different_channels = max(*max_num_different_channels,
3594                                           c->num_different_channels);
3595 }
3596
3597 int ieee80211_max_num_channels(struct ieee80211_local *local)
3598 {
3599         struct ieee80211_sub_if_data *sdata;
3600         struct ieee80211_chanctx *ctx;
3601         u32 max_num_different_channels = 1;
3602         int err;
3603         struct iface_combination_params params = {0};
3604
3605         lockdep_assert_held(&local->chanctx_mtx);
3606
3607         list_for_each_entry(ctx, &local->chanctx_list, list) {
3608                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3609                         continue;
3610
3611                 params.num_different_channels++;
3612
3613                 params.radar_detect |=
3614                         ieee80211_chanctx_radar_detect(local, ctx);
3615         }
3616
3617         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3618                 params.iftype_num[sdata->wdev.iftype]++;
3619
3620         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3621                                          ieee80211_iter_max_chans,
3622                                          &max_num_different_channels);
3623         if (err < 0)
3624                 return err;
3625
3626         return max_num_different_channels;
3627 }
3628
3629 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3630 {
3631         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3632         *buf++ = 7; /* len */
3633         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3634         *buf++ = 0x50;
3635         *buf++ = 0xf2;
3636         *buf++ = 2; /* WME */
3637         *buf++ = 0; /* WME info */
3638         *buf++ = 1; /* WME ver */
3639         *buf++ = qosinfo; /* U-APSD no in use */
3640
3641         return buf;
3642 }
3643
3644 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3645                              unsigned long *frame_cnt,
3646                              unsigned long *byte_cnt)
3647 {
3648         struct txq_info *txqi = to_txq_info(txq);
3649         u32 frag_cnt = 0, frag_bytes = 0;
3650         struct sk_buff *skb;
3651
3652         skb_queue_walk(&txqi->frags, skb) {
3653                 frag_cnt++;
3654                 frag_bytes += skb->len;
3655         }
3656
3657         if (frame_cnt)
3658                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3659
3660         if (byte_cnt)
3661                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3662 }
3663 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3664
3665 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3666         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3667         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3668         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3669         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3670 };