net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2019 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42         BUG_ON(!wiphy);
  43
  44         local = wiphy_priv(wiphy);
  45         return &local->hw;
  46 }
  47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  48
  49 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  50 {
  51         struct sk_buff *skb;
  52         struct ieee80211_hdr *hdr;
  53
  54         skb_queue_walk(&tx->skbs, skb) {
  55                 hdr = (struct ieee80211_hdr *) skb->data;
  56                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  57         }
  58 }
  59
  60 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  61                              int rate, int erp, int short_preamble,
  62                              int shift)
  63 {
  64         int dur;
  65
  66         /* calculate duration (in microseconds, rounded up to next higher
  67          * integer if it includes a fractional microsecond) to send frame of
  68          * len bytes (does not include FCS) at the given rate. Duration will
  69          * also include SIFS.
  70          *
  71          * rate is in 100 kbps, so divident is multiplied by 10 in the
  72          * DIV_ROUND_UP() operations.
  73          *
  74          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  75          * is assumed to be 0 otherwise.
  76          */
  77
  78         if (band == NL80211_BAND_5GHZ || erp) {
  79                 /*
  80                  * OFDM:
  81                  *
  82                  * N_DBPS = DATARATE x 4
  83                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  84                  *      (16 = SIGNAL time, 6 = tail bits)
  85                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  86                  *
  87                  * T_SYM = 4 usec
  88                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  89                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  90                  *      signal ext = 6 usec
  91                  */
  92                 dur = 16; /* SIFS + signal ext */
  93                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  94                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  95
  96                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  97                  *  * times 4 for 5 MHz
  98                  *  * times 2 for 10 MHz
  99                  */
 100                 dur *= 1 << shift;
 101
 102                 /* rates should already consider the channel bandwidth,
 103                  * don't apply divisor again.
 104                  */
 105                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 106                                         4 * rate); /* T_SYM x N_SYM */
 107         } else {
 108                 /*
 109                  * 802.11b or 802.11g with 802.11b compatibility:
 110                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 111                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 112                  *
 113                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 114                  * aSIFSTime = 10 usec
 115                  * aPreambleLength = 144 usec or 72 usec with short preamble
 116                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 117                  */
 118                 dur = 10; /* aSIFSTime = 10 usec */
 119                 dur += short_preamble ? (72 + 24) : (144 + 48);
 120
 121                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 122         }
 123
 124         return dur;
 125 }
 126
 127 /* Exported duration function for driver use */
 128 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 129                                         struct ieee80211_vif *vif,
 130                                         enum nl80211_band band,
 131                                         size_t frame_len,
 132                                         struct ieee80211_rate *rate)
 133 {
 134         struct ieee80211_sub_if_data *sdata;
 135         u16 dur;
 136         int erp, shift = 0;
 137         bool short_preamble = false;
 138
 139         erp = 0;
 140         if (vif) {
 141                 sdata = vif_to_sdata(vif);
 142                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 143                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 144                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 145                 shift = ieee80211_vif_get_shift(vif);
 146         }
 147
 148         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 149                                        short_preamble, shift);
 150
 151         return cpu_to_le16(dur);
 152 }
 153 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 154
 155 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 156                               struct ieee80211_vif *vif, size_t frame_len,
 157                               const struct ieee80211_tx_info *frame_txctl)
 158 {
 159         struct ieee80211_local *local = hw_to_local(hw);
 160         struct ieee80211_rate *rate;
 161         struct ieee80211_sub_if_data *sdata;
 162         bool short_preamble;
 163         int erp, shift = 0, bitrate;
 164         u16 dur;
 165         struct ieee80211_supported_band *sband;
 166
 167         sband = local->hw.wiphy->bands[frame_txctl->band];
 168
 169         short_preamble = false;
 170
 171         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 172
 173         erp = 0;
 174         if (vif) {
 175                 sdata = vif_to_sdata(vif);
 176                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 177                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 178                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 179                 shift = ieee80211_vif_get_shift(vif);
 180         }
 181
 182         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 183
 184         /* CTS duration */
 185         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 186                                        erp, short_preamble, shift);
 187         /* Data frame duration */
 188         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 189                                         erp, short_preamble, shift);
 190         /* ACK duration */
 191         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 192                                         erp, short_preamble, shift);
 193
 194         return cpu_to_le16(dur);
 195 }
 196 EXPORT_SYMBOL(ieee80211_rts_duration);
 197
 198 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 199                                     struct ieee80211_vif *vif,
 200                                     size_t frame_len,
 201                                     const struct ieee80211_tx_info *frame_txctl)
 202 {
 203         struct ieee80211_local *local = hw_to_local(hw);
 204         struct ieee80211_rate *rate;
 205         struct ieee80211_sub_if_data *sdata;
 206         bool short_preamble;
 207         int erp, shift = 0, bitrate;
 208         u16 dur;
 209         struct ieee80211_supported_band *sband;
 210
 211         sband = local->hw.wiphy->bands[frame_txctl->band];
 212
 213         short_preamble = false;
 214
 215         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 216         erp = 0;
 217         if (vif) {
 218                 sdata = vif_to_sdata(vif);
 219                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 220                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 221                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 222                 shift = ieee80211_vif_get_shift(vif);
 223         }
 224
 225         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 226
 227         /* Data frame duration */
 228         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 229                                        erp, short_preamble, shift);
 230         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 231                 /* ACK duration */
 232                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 233                                                 erp, short_preamble, shift);
 234         }
 235
 236         return cpu_to_le16(dur);
 237 }
 238 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 239
 240 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 241 {
 242         struct ieee80211_local *local = sdata->local;
 243         struct ieee80211_vif *vif = &sdata->vif;
 244         struct fq *fq = &local->fq;
 245         struct ps_data *ps = NULL;
 246         struct txq_info *txqi;
 247         struct sta_info *sta;
 248         int i;
 249
 250         spin_lock_bh(&fq->lock);
 251
 252         if (sdata->vif.type == NL80211_IFTYPE_AP)
 253                 ps = &sdata->bss->ps;
 254
 255         sdata->vif.txqs_stopped[ac] = false;
 256
 257         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 258                 if (sdata != sta->sdata)
 259                         continue;
 260
 261                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 262                         struct ieee80211_txq *txq = sta->sta.txq[i];
 263
 264                         if (!txq)
 265                                 continue;
 266
 267                         txqi = to_txq_info(txq);
 268
 269                         if (ac != txq->ac)
 270                                 continue;
 271
 272                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 273                                                 &txqi->flags))
 274                                 continue;
 275
 276                         spin_unlock_bh(&fq->lock);
 277                         drv_wake_tx_queue(local, txqi);
 278                         spin_lock_bh(&fq->lock);
 279                 }
 280         }
 281
 282         if (!vif->txq)
 283                 goto out;
 284
 285         txqi = to_txq_info(vif->txq);
 286
 287         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 288             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 289                 goto out;
 290
 291         spin_unlock_bh(&fq->lock);
 292
 293         drv_wake_tx_queue(local, txqi);
 294         return;
 295 out:
 296         spin_unlock_bh(&fq->lock);
 297 }
 298
 299 static void
 300 __releases(&local->queue_stop_reason_lock)
 301 __acquires(&local->queue_stop_reason_lock)
 302 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 303 {
 304         struct ieee80211_sub_if_data *sdata;
 305         int n_acs = IEEE80211_NUM_ACS;
 306         int i;
 307
 308         rcu_read_lock();
 309
 310         if (local->hw.queues < IEEE80211_NUM_ACS)
 311                 n_acs = 1;
 312
 313         for (i = 0; i < local->hw.queues; i++) {
 314                 if (local->queue_stop_reasons[i])
 315                         continue;
 316
 317                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 318                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 319                         int ac;
 320
 321                         for (ac = 0; ac < n_acs; ac++) {
 322                                 int ac_queue = sdata->vif.hw_queue[ac];
 323
 324                                 if (ac_queue == i ||
 325                                     sdata->vif.cab_queue == i)
 326                                         __ieee80211_wake_txqs(sdata, ac);
 327                         }
 328                 }
 329                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 330         }
 331
 332         rcu_read_unlock();
 333 }
 334
 335 void ieee80211_wake_txqs(unsigned long data)
 336 {
 337         struct ieee80211_local *local = (struct ieee80211_local *)data;
 338         unsigned long flags;
 339
 340         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 341         _ieee80211_wake_txqs(local, &flags);
 342         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 343 }
 344
 345 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 346 {
 347         struct ieee80211_sub_if_data *sdata;
 348         int n_acs = IEEE80211_NUM_ACS;
 349
 350         if (local->ops->wake_tx_queue)
 351                 return;
 352
 353         if (local->hw.queues < IEEE80211_NUM_ACS)
 354                 n_acs = 1;
 355
 356         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 357                 int ac;
 358
 359                 if (!sdata->dev)
 360                         continue;
 361
 362                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 363                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 364                         continue;
 365
 366                 for (ac = 0; ac < n_acs; ac++) {
 367                         int ac_queue = sdata->vif.hw_queue[ac];
 368
 369                         if (ac_queue == queue ||
 370                             (sdata->vif.cab_queue == queue &&
 371                              local->queue_stop_reasons[ac_queue] == 0 &&
 372                              skb_queue_empty(&local->pending[ac_queue])))
 373                                 netif_wake_subqueue(sdata->dev, ac);
 374                 }
 375         }
 376 }
 377
 378 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 379                                    enum queue_stop_reason reason,
 380                                    bool refcounted,
 381                                    unsigned long *flags)
 382 {
 383         struct ieee80211_local *local = hw_to_local(hw);
 384
 385         trace_wake_queue(local, queue, reason);
 386
 387         if (WARN_ON(queue >= hw->queues))
 388                 return;
 389
 390         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 391                 return;
 392
 393         if (!refcounted) {
 394                 local->q_stop_reasons[queue][reason] = 0;
 395         } else {
 396                 local->q_stop_reasons[queue][reason]--;
 397                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 398                         local->q_stop_reasons[queue][reason] = 0;
 399         }
 400
 401         if (local->q_stop_reasons[queue][reason] == 0)
 402                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 403
 404         if (local->queue_stop_reasons[queue] != 0)
 405                 /* someone still has this queue stopped */
 406                 return;
 407
 408         if (skb_queue_empty(&local->pending[queue])) {
 409                 rcu_read_lock();
 410                 ieee80211_propagate_queue_wake(local, queue);
 411                 rcu_read_unlock();
 412         } else
 413                 tasklet_schedule(&local->tx_pending_tasklet);
 414
 415         /*
 416          * Calling _ieee80211_wake_txqs here can be a problem because it may
 417          * release queue_stop_reason_lock which has been taken by
 418          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 419          * release someone's lock, but it is fine because all the callers of
 420          * __ieee80211_wake_queue call it right before releasing the lock.
 421          */
 422         if (local->ops->wake_tx_queue) {
 423                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 424                         tasklet_schedule(&local->wake_txqs_tasklet);
 425                 else
 426                         _ieee80211_wake_txqs(local, flags);
 427         }
 428 }
 429
 430 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 431                                     enum queue_stop_reason reason,
 432                                     bool refcounted)
 433 {
 434         struct ieee80211_local *local = hw_to_local(hw);
 435         unsigned long flags;
 436
 437         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 438         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 439         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 440 }
 441
 442 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 443 {
 444         ieee80211_wake_queue_by_reason(hw, queue,
 445                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 446                                        false);
 447 }
 448 EXPORT_SYMBOL(ieee80211_wake_queue);
 449
 450 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 451                                    enum queue_stop_reason reason,
 452                                    bool refcounted)
 453 {
 454         struct ieee80211_local *local = hw_to_local(hw);
 455         struct ieee80211_sub_if_data *sdata;
 456         int n_acs = IEEE80211_NUM_ACS;
 457
 458         trace_stop_queue(local, queue, reason);
 459
 460         if (WARN_ON(queue >= hw->queues))
 461                 return;
 462
 463         if (!refcounted)
 464                 local->q_stop_reasons[queue][reason] = 1;
 465         else
 466                 local->q_stop_reasons[queue][reason]++;
 467
 468         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 469                 return;
 470
 471         if (local->hw.queues < IEEE80211_NUM_ACS)
 472                 n_acs = 1;
 473
 474         rcu_read_lock();
 475         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 476                 int ac;
 477
 478                 if (!sdata->dev)
 479                         continue;
 480
 481                 for (ac = 0; ac < n_acs; ac++) {
 482                         if (sdata->vif.hw_queue[ac] == queue ||
 483                             sdata->vif.cab_queue == queue) {
 484                                 if (!local->ops->wake_tx_queue) {
 485                                         netif_stop_subqueue(sdata->dev, ac);
 486                                         continue;
 487                                 }
 488                                 spin_lock(&local->fq.lock);
 489                                 sdata->vif.txqs_stopped[ac] = true;
 490                                 spin_unlock(&local->fq.lock);
 491                         }
 492                 }
 493         }
 494         rcu_read_unlock();
 495 }
 496
 497 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 498                                     enum queue_stop_reason reason,
 499                                     bool refcounted)
 500 {
 501         struct ieee80211_local *local = hw_to_local(hw);
 502         unsigned long flags;
 503
 504         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 505         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 506         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 507 }
 508
 509 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 510 {
 511         ieee80211_stop_queue_by_reason(hw, queue,
 512                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 513                                        false);
 514 }
 515 EXPORT_SYMBOL(ieee80211_stop_queue);
 516
 517 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 518                                struct sk_buff *skb)
 519 {
 520         struct ieee80211_hw *hw = &local->hw;
 521         unsigned long flags;
 522         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 523         int queue = info->hw_queue;
 524
 525         if (WARN_ON(!info->control.vif)) {
 526                 ieee80211_free_txskb(&local->hw, skb);
 527                 return;
 528         }
 529
 530         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 531         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 532                                false);
 533         __skb_queue_tail(&local->pending[queue], skb);
 534         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 535                                false, &flags);
 536         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 537 }
 538
 539 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 540                                 struct sk_buff_head *skbs)
 541 {
 542         struct ieee80211_hw *hw = &local->hw;
 543         struct sk_buff *skb;
 544         unsigned long flags;
 545         int queue, i;
 546
 547         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 548         while ((skb = skb_dequeue(skbs))) {
 549                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 550
 551                 if (WARN_ON(!info->control.vif)) {
 552                         ieee80211_free_txskb(&local->hw, skb);
 553                         continue;
 554                 }
 555
 556                 queue = info->hw_queue;
 557
 558                 __ieee80211_stop_queue(hw, queue,
 559                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 560                                 false);
 561
 562                 __skb_queue_tail(&local->pending[queue], skb);
 563         }
 564
 565         for (i = 0; i < hw->queues; i++)
 566                 __ieee80211_wake_queue(hw, i,
 567                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 568                         false, &flags);
 569         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 570 }
 571
 572 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 573                                      unsigned long queues,
 574                                      enum queue_stop_reason reason,
 575                                      bool refcounted)
 576 {
 577         struct ieee80211_local *local = hw_to_local(hw);
 578         unsigned long flags;
 579         int i;
 580
 581         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 582
 583         for_each_set_bit(i, &queues, hw->queues)
 584                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 585
 586         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 587 }
 588
 589 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 590 {
 591         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 592                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 593                                         false);
 594 }
 595 EXPORT_SYMBOL(ieee80211_stop_queues);
 596
 597 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 598 {
 599         struct ieee80211_local *local = hw_to_local(hw);
 600         unsigned long flags;
 601         int ret;
 602
 603         if (WARN_ON(queue >= hw->queues))
 604                 return true;
 605
 606         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 607         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 608                        &local->queue_stop_reasons[queue]);
 609         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 610         return ret;
 611 }
 612 EXPORT_SYMBOL(ieee80211_queue_stopped);
 613
 614 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 615                                      unsigned long queues,
 616                                      enum queue_stop_reason reason,
 617                                      bool refcounted)
 618 {
 619         struct ieee80211_local *local = hw_to_local(hw);
 620         unsigned long flags;
 621         int i;
 622
 623         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 624
 625         for_each_set_bit(i, &queues, hw->queues)
 626                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 627
 628         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 629 }
 630
 631 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 632 {
 633         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 634                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 635                                         false);
 636 }
 637 EXPORT_SYMBOL(ieee80211_wake_queues);
 638
 639 static unsigned int
 640 ieee80211_get_vif_queues(struct ieee80211_local *local,
 641                          struct ieee80211_sub_if_data *sdata)
 642 {
 643         unsigned int queues;
 644
 645         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 646                 int ac;
 647
 648                 queues = 0;
 649
 650                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 651                         queues |= BIT(sdata->vif.hw_queue[ac]);
 652                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 653                         queues |= BIT(sdata->vif.cab_queue);
 654         } else {
 655                 /* all queues */
 656                 queues = BIT(local->hw.queues) - 1;
 657         }
 658
 659         return queues;
 660 }
 661
 662 void __ieee80211_flush_queues(struct ieee80211_local *local,
 663                               struct ieee80211_sub_if_data *sdata,
 664                               unsigned int queues, bool drop)
 665 {
 666         if (!local->ops->flush)
 667                 return;
 668
 669         /*
 670          * If no queue was set, or if the HW doesn't support
 671          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 672          */
 673         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 674                 queues = ieee80211_get_vif_queues(local, sdata);
 675
 676         ieee80211_stop_queues_by_reason(&local->hw, queues,
 677                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 678                                         false);
 679
 680         drv_flush(local, sdata, queues, drop);
 681
 682         ieee80211_wake_queues_by_reason(&local->hw, queues,
 683                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 684                                         false);
 685 }
 686
 687 void ieee80211_flush_queues(struct ieee80211_local *local,
 688                             struct ieee80211_sub_if_data *sdata, bool drop)
 689 {
 690         __ieee80211_flush_queues(local, sdata, 0, drop);
 691 }
 692
 693 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 694                                struct ieee80211_sub_if_data *sdata,
 695                                enum queue_stop_reason reason)
 696 {
 697         ieee80211_stop_queues_by_reason(&local->hw,
 698                                         ieee80211_get_vif_queues(local, sdata),
 699                                         reason, true);
 700 }
 701
 702 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 703                                struct ieee80211_sub_if_data *sdata,
 704                                enum queue_stop_reason reason)
 705 {
 706         ieee80211_wake_queues_by_reason(&local->hw,
 707                                         ieee80211_get_vif_queues(local, sdata),
 708                                         reason, true);
 709 }
 710
 711 static void __iterate_interfaces(struct ieee80211_local *local,
 712                                  u32 iter_flags,
 713                                  void (*iterator)(void *data, u8 *mac,
 714                                                   struct ieee80211_vif *vif),
 715                                  void *data)
 716 {
 717         struct ieee80211_sub_if_data *sdata;
 718         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 719
 720         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 721                 switch (sdata->vif.type) {
 722                 case NL80211_IFTYPE_MONITOR:
 723                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 724                                 continue;
 725                         break;
 726                 case NL80211_IFTYPE_AP_VLAN:
 727                         continue;
 728                 default:
 729                         break;
 730                 }
 731                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 732                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 733                         continue;
 734                 if (ieee80211_sdata_running(sdata) || !active_only)
 735                         iterator(data, sdata->vif.addr,
 736                                  &sdata->vif);
 737         }
 738
 739         sdata = rcu_dereference_check(local->monitor_sdata,
 740                                       lockdep_is_held(&local->iflist_mtx) ||
 741                                       lockdep_rtnl_is_held());
 742         if (sdata &&
 743             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 744              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 745                 iterator(data, sdata->vif.addr, &sdata->vif);
 746 }
 747
 748 void ieee80211_iterate_interfaces(
 749         struct ieee80211_hw *hw, u32 iter_flags,
 750         void (*iterator)(void *data, u8 *mac,
 751                          struct ieee80211_vif *vif),
 752         void *data)
 753 {
 754         struct ieee80211_local *local = hw_to_local(hw);
 755
 756         mutex_lock(&local->iflist_mtx);
 757         __iterate_interfaces(local, iter_flags, iterator, data);
 758         mutex_unlock(&local->iflist_mtx);
 759 }
 760 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 761
 762 void ieee80211_iterate_active_interfaces_atomic(
 763         struct ieee80211_hw *hw, u32 iter_flags,
 764         void (*iterator)(void *data, u8 *mac,
 765                          struct ieee80211_vif *vif),
 766         void *data)
 767 {
 768         struct ieee80211_local *local = hw_to_local(hw);
 769
 770         rcu_read_lock();
 771         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 772                              iterator, data);
 773         rcu_read_unlock();
 774 }
 775 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 776
 777 void ieee80211_iterate_active_interfaces_rtnl(
 778         struct ieee80211_hw *hw, u32 iter_flags,
 779         void (*iterator)(void *data, u8 *mac,
 780                          struct ieee80211_vif *vif),
 781         void *data)
 782 {
 783         struct ieee80211_local *local = hw_to_local(hw);
 784
 785         ASSERT_RTNL();
 786
 787         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 788                              iterator, data);
 789 }
 790 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 791
 792 static void __iterate_stations(struct ieee80211_local *local,
 793                                void (*iterator)(void *data,
 794                                                 struct ieee80211_sta *sta),
 795                                void *data)
 796 {
 797         struct sta_info *sta;
 798
 799         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 800                 if (!sta->uploaded)
 801                         continue;
 802
 803                 iterator(data, &sta->sta);
 804         }
 805 }
 806
 807 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 808                         void (*iterator)(void *data,
 809                                          struct ieee80211_sta *sta),
 810                         void *data)
 811 {
 812         struct ieee80211_local *local = hw_to_local(hw);
 813
 814         rcu_read_lock();
 815         __iterate_stations(local, iterator, data);
 816         rcu_read_unlock();
 817 }
 818 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 819
 820 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 821 {
 822         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 823
 824         if (!ieee80211_sdata_running(sdata) ||
 825             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 826                 return NULL;
 827         return &sdata->vif;
 828 }
 829 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 830
 831 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 832 {
 833         struct ieee80211_sub_if_data *sdata;
 834
 835         if (!vif)
 836                 return NULL;
 837
 838         sdata = vif_to_sdata(vif);
 839
 840         if (!ieee80211_sdata_running(sdata) ||
 841             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 842                 return NULL;
 843
 844         return &sdata->wdev;
 845 }
 846 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 847
 848 /*
 849  * Nothing should have been stuffed into the workqueue during
 850  * the suspend->resume cycle. Since we can't check each caller
 851  * of this function if we are already quiescing / suspended,
 852  * check here and don't WARN since this can actually happen when
 853  * the rx path (for example) is racing against __ieee80211_suspend
 854  * and suspending / quiescing was set after the rx path checked
 855  * them.
 856  */
 857 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 858 {
 859         if (local->quiescing || (local->suspended && !local->resuming)) {
 860                 pr_warn("queueing ieee80211 work while going to suspend\n");
 861                 return false;
 862         }
 863
 864         return true;
 865 }
 866
 867 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 868 {
 869         struct ieee80211_local *local = hw_to_local(hw);
 870
 871         if (!ieee80211_can_queue_work(local))
 872                 return;
 873
 874         queue_work(local->workqueue, work);
 875 }
 876 EXPORT_SYMBOL(ieee80211_queue_work);
 877
 878 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 879                                   struct delayed_work *dwork,
 880                                   unsigned long delay)
 881 {
 882         struct ieee80211_local *local = hw_to_local(hw);
 883
 884         if (!ieee80211_can_queue_work(local))
 885                 return;
 886
 887         queue_delayed_work(local->workqueue, dwork, delay);
 888 }
 889 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 890
 891 static u32
 892 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 893                             struct ieee802_11_elems *elems,
 894                             u64 filter, u32 crc,
 895                             const struct element *check_inherit)
 896 {
 897         const struct element *elem;
 898         bool calc_crc = filter != 0;
 899         DECLARE_BITMAP(seen_elems, 256);
 900         const u8 *ie;
 901
 902         bitmap_zero(seen_elems, 256);
 903
 904         for_each_element(elem, start, len) {
 905                 bool elem_parse_failed;
 906                 u8 id = elem->id;
 907                 u8 elen = elem->datalen;
 908                 const u8 *pos = elem->data;
 909
 910                 if (check_inherit &&
 911                     !cfg80211_is_element_inherited(elem,
 912                                                    check_inherit))
 913                         continue;
 914
 915                 switch (id) {
 916                 case WLAN_EID_SSID:
 917                 case WLAN_EID_SUPP_RATES:
 918                 case WLAN_EID_FH_PARAMS:
 919                 case WLAN_EID_DS_PARAMS:
 920                 case WLAN_EID_CF_PARAMS:
 921                 case WLAN_EID_TIM:
 922                 case WLAN_EID_IBSS_PARAMS:
 923                 case WLAN_EID_CHALLENGE:
 924                 case WLAN_EID_RSN:
 925                 case WLAN_EID_ERP_INFO:
 926                 case WLAN_EID_EXT_SUPP_RATES:
 927                 case WLAN_EID_HT_CAPABILITY:
 928                 case WLAN_EID_HT_OPERATION:
 929                 case WLAN_EID_VHT_CAPABILITY:
 930                 case WLAN_EID_VHT_OPERATION:
 931                 case WLAN_EID_MESH_ID:
 932                 case WLAN_EID_MESH_CONFIG:
 933                 case WLAN_EID_PEER_MGMT:
 934                 case WLAN_EID_PREQ:
 935                 case WLAN_EID_PREP:
 936                 case WLAN_EID_PERR:
 937                 case WLAN_EID_RANN:
 938                 case WLAN_EID_CHANNEL_SWITCH:
 939                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 940                 case WLAN_EID_COUNTRY:
 941                 case WLAN_EID_PWR_CONSTRAINT:
 942                 case WLAN_EID_TIMEOUT_INTERVAL:
 943                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 944                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 945                 case WLAN_EID_CHAN_SWITCH_PARAM:
 946                 case WLAN_EID_EXT_CAPABILITY:
 947                 case WLAN_EID_CHAN_SWITCH_TIMING:
 948                 case WLAN_EID_LINK_ID:
 949                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 950                 /*
 951                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 952                  * that if the content gets bigger it might be needed more than once
 953                  */
 954                         if (test_bit(id, seen_elems)) {
 955                                 elems->parse_error = true;
 956                                 continue;
 957                         }
 958                         break;
 959                 }
 960
 961                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 962                         crc = crc32_be(crc, pos - 2, elen + 2);
 963
 964                 elem_parse_failed = false;
 965
 966                 switch (id) {
 967                 case WLAN_EID_LINK_ID:
 968                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 969                                 elem_parse_failed = true;
 970                                 break;
 971                         }
 972                         elems->lnk_id = (void *)(pos - 2);
 973                         break;
 974                 case WLAN_EID_CHAN_SWITCH_TIMING:
 975                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 976                                 elem_parse_failed = true;
 977                                 break;
 978                         }
 979                         elems->ch_sw_timing = (void *)pos;
 980                         break;
 981                 case WLAN_EID_EXT_CAPABILITY:
 982                         elems->ext_capab = pos;
 983                         elems->ext_capab_len = elen;
 984                         break;
 985                 case WLAN_EID_SSID:
 986                         elems->ssid = pos;
 987                         elems->ssid_len = elen;
 988                         break;
 989                 case WLAN_EID_SUPP_RATES:
 990                         elems->supp_rates = pos;
 991                         elems->supp_rates_len = elen;
 992                         break;
 993                 case WLAN_EID_DS_PARAMS:
 994                         if (elen >= 1)
 995                                 elems->ds_params = pos;
 996                         else
 997                                 elem_parse_failed = true;
 998                         break;
 999                 case WLAN_EID_TIM:
1000                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1001                                 elems->tim = (void *)pos;
1002                                 elems->tim_len = elen;
1003                         } else
1004                                 elem_parse_failed = true;
1005                         break;
1006                 case WLAN_EID_CHALLENGE:
1007                         elems->challenge = pos;
1008                         elems->challenge_len = elen;
1009                         break;
1010                 case WLAN_EID_VENDOR_SPECIFIC:
1011                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1012                             pos[2] == 0xf2) {
1013                                 /* Microsoft OUI (00:50:F2) */
1014
1015                                 if (calc_crc)
1016                                         crc = crc32_be(crc, pos - 2, elen + 2);
1017
1018                                 if (elen >= 5 && pos[3] == 2) {
1019                                         /* OUI Type 2 - WMM IE */
1020                                         if (pos[4] == 0) {
1021                                                 elems->wmm_info = pos;
1022                                                 elems->wmm_info_len = elen;
1023                                         } else if (pos[4] == 1) {
1024                                                 elems->wmm_param = pos;
1025                                                 elems->wmm_param_len = elen;
1026                                         }
1027                                 }
1028                         }
1029                         break;
1030                 case WLAN_EID_RSN:
1031                         elems->rsn = pos;
1032                         elems->rsn_len = elen;
1033                         break;
1034                 case WLAN_EID_ERP_INFO:
1035                         if (elen >= 1)
1036                                 elems->erp_info = pos;
1037                         else
1038                                 elem_parse_failed = true;
1039                         break;
1040                 case WLAN_EID_EXT_SUPP_RATES:
1041                         elems->ext_supp_rates = pos;
1042                         elems->ext_supp_rates_len = elen;
1043                         break;
1044                 case WLAN_EID_HT_CAPABILITY:
1045                         if (elen >= sizeof(struct ieee80211_ht_cap))
1046                                 elems->ht_cap_elem = (void *)pos;
1047                         else
1048                                 elem_parse_failed = true;
1049                         break;
1050                 case WLAN_EID_HT_OPERATION:
1051                         if (elen >= sizeof(struct ieee80211_ht_operation))
1052                                 elems->ht_operation = (void *)pos;
1053                         else
1054                                 elem_parse_failed = true;
1055                         break;
1056                 case WLAN_EID_VHT_CAPABILITY:
1057                         if (elen >= sizeof(struct ieee80211_vht_cap))
1058                                 elems->vht_cap_elem = (void *)pos;
1059                         else
1060                                 elem_parse_failed = true;
1061                         break;
1062                 case WLAN_EID_VHT_OPERATION:
1063                         if (elen >= sizeof(struct ieee80211_vht_operation))
1064                                 elems->vht_operation = (void *)pos;
1065                         else
1066                                 elem_parse_failed = true;
1067                         break;
1068                 case WLAN_EID_OPMODE_NOTIF:
1069                         if (elen > 0)
1070                                 elems->opmode_notif = pos;
1071                         else
1072                                 elem_parse_failed = true;
1073                         break;
1074                 case WLAN_EID_MESH_ID:
1075                         elems->mesh_id = pos;
1076                         elems->mesh_id_len = elen;
1077                         break;
1078                 case WLAN_EID_MESH_CONFIG:
1079                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1080                                 elems->mesh_config = (void *)pos;
1081                         else
1082                                 elem_parse_failed = true;
1083                         break;
1084                 case WLAN_EID_PEER_MGMT:
1085                         elems->peering = pos;
1086                         elems->peering_len = elen;
1087                         break;
1088                 case WLAN_EID_MESH_AWAKE_WINDOW:
1089                         if (elen >= 2)
1090                                 elems->awake_window = (void *)pos;
1091                         break;
1092                 case WLAN_EID_PREQ:
1093                         elems->preq = pos;
1094                         elems->preq_len = elen;
1095                         break;
1096                 case WLAN_EID_PREP:
1097                         elems->prep = pos;
1098                         elems->prep_len = elen;
1099                         break;
1100                 case WLAN_EID_PERR:
1101                         elems->perr = pos;
1102                         elems->perr_len = elen;
1103                         break;
1104                 case WLAN_EID_RANN:
1105                         if (elen >= sizeof(struct ieee80211_rann_ie))
1106                                 elems->rann = (void *)pos;
1107                         else
1108                                 elem_parse_failed = true;
1109                         break;
1110                 case WLAN_EID_CHANNEL_SWITCH:
1111                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1112                                 elem_parse_failed = true;
1113                                 break;
1114                         }
1115                         elems->ch_switch_ie = (void *)pos;
1116                         break;
1117                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1118                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1119                                 elem_parse_failed = true;
1120                                 break;
1121                         }
1122                         elems->ext_chansw_ie = (void *)pos;
1123                         break;
1124                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1125                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1126                                 elem_parse_failed = true;
1127                                 break;
1128                         }
1129                         elems->sec_chan_offs = (void *)pos;
1130                         break;
1131                 case WLAN_EID_CHAN_SWITCH_PARAM:
1132                         if (elen !=
1133                             sizeof(*elems->mesh_chansw_params_ie)) {
1134                                 elem_parse_failed = true;
1135                                 break;
1136                         }
1137                         elems->mesh_chansw_params_ie = (void *)pos;
1138                         break;
1139                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1140                         if (!action ||
1141                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1142                                 elem_parse_failed = true;
1143                                 break;
1144                         }
1145                         elems->wide_bw_chansw_ie = (void *)pos;
1146                         break;
1147                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1148                         if (action) {
1149                                 elem_parse_failed = true;
1150                                 break;
1151                         }
1152                         /*
1153                          * This is a bit tricky, but as we only care about
1154                          * the wide bandwidth channel switch element, so
1155                          * just parse it out manually.
1156                          */
1157                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1158                                               pos, elen);
1159                         if (ie) {
1160                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1161                                         elems->wide_bw_chansw_ie =
1162                                                 (void *)(ie + 2);
1163                                 else
1164                                         elem_parse_failed = true;
1165                         }
1166                         break;
1167                 case WLAN_EID_COUNTRY:
1168                         elems->country_elem = pos;
1169                         elems->country_elem_len = elen;
1170                         break;
1171                 case WLAN_EID_PWR_CONSTRAINT:
1172                         if (elen != 1) {
1173                                 elem_parse_failed = true;
1174                                 break;
1175                         }
1176                         elems->pwr_constr_elem = pos;
1177                         break;
1178                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1179                         /* Lots of different options exist, but we only care
1180                          * about the Dynamic Transmit Power Control element.
1181                          * First check for the Cisco OUI, then for the DTPC
1182                          * tag (0x00).
1183                          */
1184                         if (elen < 4) {
1185                                 elem_parse_failed = true;
1186                                 break;
1187                         }
1188
1189                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1190                             pos[2] != 0x96 || pos[3] != 0x00)
1191                                 break;
1192
1193                         if (elen != 6) {
1194                                 elem_parse_failed = true;
1195                                 break;
1196                         }
1197
1198                         if (calc_crc)
1199                                 crc = crc32_be(crc, pos - 2, elen + 2);
1200
1201                         elems->cisco_dtpc_elem = pos;
1202                         break;
1203                 case WLAN_EID_ADDBA_EXT:
1204                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1205                                 elem_parse_failed = true;
1206                                 break;
1207                         }
1208                         elems->addba_ext_ie = (void *)pos;
1209                         break;
1210                 case WLAN_EID_TIMEOUT_INTERVAL:
1211                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1212                                 elems->timeout_int = (void *)pos;
1213                         else
1214                                 elem_parse_failed = true;
1215                         break;
1216                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1217                         if (elen >= sizeof(*elems->max_idle_period_ie))
1218                                 elems->max_idle_period_ie = (void *)pos;
1219                         break;
1220                 case WLAN_EID_EXTENSION:
1221                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1222                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1223                                 elems->mu_edca_param_set = (void *)&pos[1];
1224                                 if (calc_crc)
1225                                         crc = crc32_be(crc, pos - 2, elen + 2);
1226                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1227                                 elems->he_cap = (void *)&pos[1];
1228                                 elems->he_cap_len = elen - 1;
1229                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1230                                    elen >= sizeof(*elems->he_operation) &&
1231                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1232                                 elems->he_operation = (void *)&pos[1];
1233                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1234                                 elems->uora_element = (void *)&pos[1];
1235                         } else if (pos[0] ==
1236                                    WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1237                                    elen == 4) {
1238                                 elems->max_channel_switch_time = pos + 1;
1239                         } else if (pos[0] ==
1240                                    WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1241                                    elen == 3) {
1242                                 elems->mbssid_config_ie = (void *)&pos[1];
1243                         } else if (pos[0] == WLAN_EID_EXT_HE_SPR &&
1244                                    elen >= sizeof(*elems->he_spr) &&
1245                                    elen >= ieee80211_he_spr_size(&pos[1])) {
1246                                 elems->he_spr = (void *)&pos[1];
1247                         }
1248                         break;
1249                 default:
1250                         break;
1251                 }
1252
1253                 if (elem_parse_failed)
1254                         elems->parse_error = true;
1255                 else
1256                         __set_bit(id, seen_elems);
1257         }
1258
1259         if (!for_each_element_completed(elem, start, len))
1260                 elems->parse_error = true;
1261
1262         return crc;
1263 }
1264
1265 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1266                                             struct ieee802_11_elems *elems,
1267                                             u8 *transmitter_bssid,
1268                                             u8 *bss_bssid,
1269                                             u8 *nontransmitted_profile)
1270 {
1271         const struct element *elem, *sub;
1272         size_t profile_len = 0;
1273         bool found = false;
1274
1275         if (!bss_bssid || !transmitter_bssid)
1276                 return profile_len;
1277
1278         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1279                 if (elem->datalen < 2)
1280                         continue;
1281
1282                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1283                         u8 new_bssid[ETH_ALEN];
1284                         const u8 *index;
1285
1286                         if (sub->id != 0 || sub->datalen < 4) {
1287                                 /* not a valid BSS profile */
1288                                 continue;
1289                         }
1290
1291                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1292                             sub->data[1] != 2) {
1293                                 /* The first element of the
1294                                  * Nontransmitted BSSID Profile is not
1295                                  * the Nontransmitted BSSID Capability
1296                                  * element.
1297                                  */
1298                                 continue;
1299                         }
1300
1301                         memset(nontransmitted_profile, 0, len);
1302                         profile_len = cfg80211_merge_profile(start, len,
1303                                                              elem,
1304                                                              sub,
1305                                                              nontransmitted_profile,
1306                                                              len);
1307
1308                         /* found a Nontransmitted BSSID Profile */
1309                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1310                                                  nontransmitted_profile,
1311                                                  profile_len);
1312                         if (!index || index[1] < 1 || index[2] == 0) {
1313                                 /* Invalid MBSSID Index element */
1314                                 continue;
1315                         }
1316
1317                         cfg80211_gen_new_bssid(transmitter_bssid,
1318                                                elem->data[0],
1319                                                index[2],
1320                                                new_bssid);
1321                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1322                                 found = true;
1323                                 elems->bssid_index_len = index[1];
1324                                 elems->bssid_index = (void *)&index[2];
1325                                 break;
1326                         }
1327                 }
1328         }
1329
1330         return found ? profile_len : 0;
1331 }
1332
1333 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1334                                struct ieee802_11_elems *elems,
1335                                u64 filter, u32 crc, u8 *transmitter_bssid,
1336                                u8 *bss_bssid)
1337 {
1338         const struct element *non_inherit = NULL;
1339         u8 *nontransmitted_profile;
1340         int nontransmitted_profile_len = 0;
1341
1342         memset(elems, 0, sizeof(*elems));
1343         elems->ie_start = start;
1344         elems->total_len = len;
1345
1346         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1347         if (nontransmitted_profile) {
1348                 nontransmitted_profile_len =
1349                         ieee802_11_find_bssid_profile(start, len, elems,
1350                                                       transmitter_bssid,
1351                                                       bss_bssid,
1352                                                       nontransmitted_profile);
1353                 non_inherit =
1354                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1355                                                nontransmitted_profile,
1356                                                nontransmitted_profile_len);
1357         }
1358
1359         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1360                                           crc, non_inherit);
1361
1362         /* Override with nontransmitted profile, if found */
1363         if (nontransmitted_profile_len)
1364                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1365                                             nontransmitted_profile_len,
1366                                             action, elems, 0, 0, NULL);
1367
1368         if (elems->tim && !elems->parse_error) {
1369                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1370
1371                 elems->dtim_period = tim_ie->dtim_period;
1372                 elems->dtim_count = tim_ie->dtim_count;
1373         }
1374
1375         /* Override DTIM period and count if needed */
1376         if (elems->bssid_index &&
1377             elems->bssid_index_len >=
1378             offsetofend(struct ieee80211_bssid_index, dtim_period))
1379                 elems->dtim_period = elems->bssid_index->dtim_period;
1380
1381         if (elems->bssid_index &&
1382             elems->bssid_index_len >=
1383             offsetofend(struct ieee80211_bssid_index, dtim_count))
1384                 elems->dtim_count = elems->bssid_index->dtim_count;
1385
1386         kfree(nontransmitted_profile);
1387
1388         return crc;
1389 }
1390
1391 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1392                                            struct ieee80211_tx_queue_params
1393                                            *qparam, int ac)
1394 {
1395         struct ieee80211_chanctx_conf *chanctx_conf;
1396         const struct ieee80211_reg_rule *rrule;
1397         const struct ieee80211_wmm_ac *wmm_ac;
1398         u16 center_freq = 0;
1399
1400         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1401             sdata->vif.type != NL80211_IFTYPE_STATION)
1402                 return;
1403
1404         rcu_read_lock();
1405         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1406         if (chanctx_conf)
1407                 center_freq = chanctx_conf->def.chan->center_freq;
1408
1409         if (!center_freq) {
1410                 rcu_read_unlock();
1411                 return;
1412         }
1413
1414         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1415
1416         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1417                 rcu_read_unlock();
1418                 return;
1419         }
1420
1421         if (sdata->vif.type == NL80211_IFTYPE_AP)
1422                 wmm_ac = &rrule->wmm_rule.ap[ac];
1423         else
1424                 wmm_ac = &rrule->wmm_rule.client[ac];
1425         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1426         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1427         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1428         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1429         rcu_read_unlock();
1430 }
1431
1432 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1433                                bool bss_notify, bool enable_qos)
1434 {
1435         struct ieee80211_local *local = sdata->local;
1436         struct ieee80211_tx_queue_params qparam;
1437         struct ieee80211_chanctx_conf *chanctx_conf;
1438         int ac;
1439         bool use_11b;
1440         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1441         int aCWmin, aCWmax;
1442
1443         if (!local->ops->conf_tx)
1444                 return;
1445
1446         if (local->hw.queues < IEEE80211_NUM_ACS)
1447                 return;
1448
1449         memset(&qparam, 0, sizeof(qparam));
1450
1451         rcu_read_lock();
1452         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1453         use_11b = (chanctx_conf &&
1454                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1455                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1456         rcu_read_unlock();
1457
1458         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1459
1460         /* Set defaults according to 802.11-2007 Table 7-37 */
1461         aCWmax = 1023;
1462         if (use_11b)
1463                 aCWmin = 31;
1464         else
1465                 aCWmin = 15;
1466
1467         /* Confiure old 802.11b/g medium access rules. */
1468         qparam.cw_max = aCWmax;
1469         qparam.cw_min = aCWmin;
1470         qparam.txop = 0;
1471         qparam.aifs = 2;
1472
1473         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1474                 /* Update if QoS is enabled. */
1475                 if (enable_qos) {
1476                         switch (ac) {
1477                         case IEEE80211_AC_BK:
1478                                 qparam.cw_max = aCWmax;
1479                                 qparam.cw_min = aCWmin;
1480                                 qparam.txop = 0;
1481                                 if (is_ocb)
1482                                         qparam.aifs = 9;
1483                                 else
1484                                         qparam.aifs = 7;
1485                                 break;
1486                         /* never happens but let's not leave undefined */
1487                         default:
1488                         case IEEE80211_AC_BE:
1489                                 qparam.cw_max = aCWmax;
1490                                 qparam.cw_min = aCWmin;
1491                                 qparam.txop = 0;
1492                                 if (is_ocb)
1493                                         qparam.aifs = 6;
1494                                 else
1495                                         qparam.aifs = 3;
1496                                 break;
1497                         case IEEE80211_AC_VI:
1498                                 qparam.cw_max = aCWmin;
1499                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1500                                 if (is_ocb)
1501                                         qparam.txop = 0;
1502                                 else if (use_11b)
1503                                         qparam.txop = 6016/32;
1504                                 else
1505                                         qparam.txop = 3008/32;
1506
1507                                 if (is_ocb)
1508                                         qparam.aifs = 3;
1509                                 else
1510                                         qparam.aifs = 2;
1511                                 break;
1512                         case IEEE80211_AC_VO:
1513                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1514                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1515                                 if (is_ocb)
1516                                         qparam.txop = 0;
1517                                 else if (use_11b)
1518                                         qparam.txop = 3264/32;
1519                                 else
1520                                         qparam.txop = 1504/32;
1521                                 qparam.aifs = 2;
1522                                 break;
1523                         }
1524                 }
1525                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1526
1527                 qparam.uapsd = false;
1528
1529                 sdata->tx_conf[ac] = qparam;
1530                 drv_conf_tx(local, sdata, ac, &qparam);
1531         }
1532
1533         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1534             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1535             sdata->vif.type != NL80211_IFTYPE_NAN) {
1536                 sdata->vif.bss_conf.qos = enable_qos;
1537                 if (bss_notify)
1538                         ieee80211_bss_info_change_notify(sdata,
1539                                                          BSS_CHANGED_QOS);
1540         }
1541 }
1542
1543 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1544                          u16 transaction, u16 auth_alg, u16 status,
1545                          const u8 *extra, size_t extra_len, const u8 *da,
1546                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1547                          u32 tx_flags)
1548 {
1549         struct ieee80211_local *local = sdata->local;
1550         struct sk_buff *skb;
1551         struct ieee80211_mgmt *mgmt;
1552         int err;
1553
1554         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1555         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1556                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1557         if (!skb)
1558                 return;
1559
1560         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1561
1562         mgmt = skb_put_zero(skb, 24 + 6);
1563         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1564                                           IEEE80211_STYPE_AUTH);
1565         memcpy(mgmt->da, da, ETH_ALEN);
1566         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1567         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1568         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1569         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1570         mgmt->u.auth.status_code = cpu_to_le16(status);
1571         if (extra)
1572                 skb_put_data(skb, extra, extra_len);
1573
1574         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1575                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1576                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1577                 WARN_ON(err);
1578         }
1579
1580         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1581                                         tx_flags;
1582         ieee80211_tx_skb(sdata, skb);
1583 }
1584
1585 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1586                                     const u8 *da, const u8 *bssid,
1587                                     u16 stype, u16 reason,
1588                                     bool send_frame, u8 *frame_buf)
1589 {
1590         struct ieee80211_local *local = sdata->local;
1591         struct sk_buff *skb;
1592         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1593
1594         /* build frame */
1595         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1596         mgmt->duration = 0; /* initialize only */
1597         mgmt->seq_ctrl = 0; /* initialize only */
1598         memcpy(mgmt->da, da, ETH_ALEN);
1599         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1600         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1601         /* u.deauth.reason_code == u.disassoc.reason_code */
1602         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1603
1604         if (send_frame) {
1605                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1606                                     IEEE80211_DEAUTH_FRAME_LEN);
1607                 if (!skb)
1608                         return;
1609
1610                 skb_reserve(skb, local->hw.extra_tx_headroom);
1611
1612                 /* copy in frame */
1613                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1614
1615                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1616                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1617                         IEEE80211_SKB_CB(skb)->flags |=
1618                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1619
1620                 ieee80211_tx_skb(sdata, skb);
1621         }
1622 }
1623
1624 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1625                                          u8 *buffer, size_t buffer_len,
1626                                          const u8 *ie, size_t ie_len,
1627                                          enum nl80211_band band,
1628                                          u32 rate_mask,
1629                                          struct cfg80211_chan_def *chandef,
1630                                          size_t *offset, u32 flags)
1631 {
1632         struct ieee80211_supported_band *sband;
1633         const struct ieee80211_sta_he_cap *he_cap;
1634         u8 *pos = buffer, *end = buffer + buffer_len;
1635         size_t noffset;
1636         int supp_rates_len, i;
1637         u8 rates[32];
1638         int num_rates;
1639         int ext_rates_len;
1640         int shift;
1641         u32 rate_flags;
1642         bool have_80mhz = false;
1643
1644         *offset = 0;
1645
1646         sband = local->hw.wiphy->bands[band];
1647         if (WARN_ON_ONCE(!sband))
1648                 return 0;
1649
1650         rate_flags = ieee80211_chandef_rate_flags(chandef);
1651         shift = ieee80211_chandef_get_shift(chandef);
1652
1653         num_rates = 0;
1654         for (i = 0; i < sband->n_bitrates; i++) {
1655                 if ((BIT(i) & rate_mask) == 0)
1656                         continue; /* skip rate */
1657                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1658                         continue;
1659
1660                 rates[num_rates++] =
1661                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1662                                           (1 << shift) * 5);
1663         }
1664
1665         supp_rates_len = min_t(int, num_rates, 8);
1666
1667         if (end - pos < 2 + supp_rates_len)
1668                 goto out_err;
1669         *pos++ = WLAN_EID_SUPP_RATES;
1670         *pos++ = supp_rates_len;
1671         memcpy(pos, rates, supp_rates_len);
1672         pos += supp_rates_len;
1673
1674         /* insert "request information" if in custom IEs */
1675         if (ie && ie_len) {
1676                 static const u8 before_extrates[] = {
1677                         WLAN_EID_SSID,
1678                         WLAN_EID_SUPP_RATES,
1679                         WLAN_EID_REQUEST,
1680                 };
1681                 noffset = ieee80211_ie_split(ie, ie_len,
1682                                              before_extrates,
1683                                              ARRAY_SIZE(before_extrates),
1684                                              *offset);
1685                 if (end - pos < noffset - *offset)
1686                         goto out_err;
1687                 memcpy(pos, ie + *offset, noffset - *offset);
1688                 pos += noffset - *offset;
1689                 *offset = noffset;
1690         }
1691
1692         ext_rates_len = num_rates - supp_rates_len;
1693         if (ext_rates_len > 0) {
1694                 if (end - pos < 2 + ext_rates_len)
1695                         goto out_err;
1696                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1697                 *pos++ = ext_rates_len;
1698                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1699                 pos += ext_rates_len;
1700         }
1701
1702         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1703                 if (end - pos < 3)
1704                         goto out_err;
1705                 *pos++ = WLAN_EID_DS_PARAMS;
1706                 *pos++ = 1;
1707                 *pos++ = ieee80211_frequency_to_channel(
1708                                 chandef->chan->center_freq);
1709         }
1710
1711         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1712                 goto done;
1713
1714         /* insert custom IEs that go before HT */
1715         if (ie && ie_len) {
1716                 static const u8 before_ht[] = {
1717                         /*
1718                          * no need to list the ones split off already
1719                          * (or generated here)
1720                          */
1721                         WLAN_EID_DS_PARAMS,
1722                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1723                 };
1724                 noffset = ieee80211_ie_split(ie, ie_len,
1725                                              before_ht, ARRAY_SIZE(before_ht),
1726                                              *offset);
1727                 if (end - pos < noffset - *offset)
1728                         goto out_err;
1729                 memcpy(pos, ie + *offset, noffset - *offset);
1730                 pos += noffset - *offset;
1731                 *offset = noffset;
1732         }
1733
1734         if (sband->ht_cap.ht_supported) {
1735                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1736                         goto out_err;
1737                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1738                                                 sband->ht_cap.cap);
1739         }
1740
1741         /* insert custom IEs that go before VHT */
1742         if (ie && ie_len) {
1743                 static const u8 before_vht[] = {
1744                         /*
1745                          * no need to list the ones split off already
1746                          * (or generated here)
1747                          */
1748                         WLAN_EID_BSS_COEX_2040,
1749                         WLAN_EID_EXT_CAPABILITY,
1750                         WLAN_EID_SSID_LIST,
1751                         WLAN_EID_CHANNEL_USAGE,
1752                         WLAN_EID_INTERWORKING,
1753                         WLAN_EID_MESH_ID,
1754                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1755                 };
1756                 noffset = ieee80211_ie_split(ie, ie_len,
1757                                              before_vht, ARRAY_SIZE(before_vht),
1758                                              *offset);
1759                 if (end - pos < noffset - *offset)
1760                         goto out_err;
1761                 memcpy(pos, ie + *offset, noffset - *offset);
1762                 pos += noffset - *offset;
1763                 *offset = noffset;
1764         }
1765
1766         /* Check if any channel in this sband supports at least 80 MHz */
1767         for (i = 0; i < sband->n_channels; i++) {
1768                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1769                                                 IEEE80211_CHAN_NO_80MHZ))
1770                         continue;
1771
1772                 have_80mhz = true;
1773                 break;
1774         }
1775
1776         if (sband->vht_cap.vht_supported && have_80mhz) {
1777                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1778                         goto out_err;
1779                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1780                                                  sband->vht_cap.cap);
1781         }
1782
1783         /* insert custom IEs that go before HE */
1784         if (ie && ie_len) {
1785                 static const u8 before_he[] = {
1786                         /*
1787                          * no need to list the ones split off before VHT
1788                          * or generated here
1789                          */
1790                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1791                         WLAN_EID_AP_CSN,
1792                         /* TODO: add 11ah/11aj/11ak elements */
1793                 };
1794                 noffset = ieee80211_ie_split(ie, ie_len,
1795                                              before_he, ARRAY_SIZE(before_he),
1796                                              *offset);
1797                 if (end - pos < noffset - *offset)
1798                         goto out_err;
1799                 memcpy(pos, ie + *offset, noffset - *offset);
1800                 pos += noffset - *offset;
1801                 *offset = noffset;
1802         }
1803
1804         he_cap = ieee80211_get_he_sta_cap(sband);
1805         if (he_cap) {
1806                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1807                 if (!pos)
1808                         goto out_err;
1809         }
1810
1811         /*
1812          * If adding more here, adjust code in main.c
1813          * that calculates local->scan_ies_len.
1814          */
1815
1816         return pos - buffer;
1817  out_err:
1818         WARN_ONCE(1, "not enough space for preq IEs\n");
1819  done:
1820         return pos - buffer;
1821 }
1822
1823 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1824                              size_t buffer_len,
1825                              struct ieee80211_scan_ies *ie_desc,
1826                              const u8 *ie, size_t ie_len,
1827                              u8 bands_used, u32 *rate_masks,
1828                              struct cfg80211_chan_def *chandef,
1829                              u32 flags)
1830 {
1831         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1832         int i;
1833
1834         memset(ie_desc, 0, sizeof(*ie_desc));
1835
1836         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1837                 if (bands_used & BIT(i)) {
1838                         pos += ieee80211_build_preq_ies_band(local,
1839                                                              buffer + pos,
1840                                                              buffer_len - pos,
1841                                                              ie, ie_len, i,
1842                                                              rate_masks[i],
1843                                                              chandef,
1844                                                              &custom_ie_offset,
1845                                                              flags);
1846                         ie_desc->ies[i] = buffer + old_pos;
1847                         ie_desc->len[i] = pos - old_pos;
1848                         old_pos = pos;
1849                 }
1850         }
1851
1852         /* add any remaining custom IEs */
1853         if (ie && ie_len) {
1854                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1855                               "not enough space for preq custom IEs\n"))
1856                         return pos;
1857                 memcpy(buffer + pos, ie + custom_ie_offset,
1858                        ie_len - custom_ie_offset);
1859                 ie_desc->common_ies = buffer + pos;
1860                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1861                 pos += ie_len - custom_ie_offset;
1862         }
1863
1864         return pos;
1865 };
1866
1867 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1868                                           const u8 *src, const u8 *dst,
1869                                           u32 ratemask,
1870                                           struct ieee80211_channel *chan,
1871                                           const u8 *ssid, size_t ssid_len,
1872                                           const u8 *ie, size_t ie_len,
1873                                           u32 flags)
1874 {
1875         struct ieee80211_local *local = sdata->local;
1876         struct cfg80211_chan_def chandef;
1877         struct sk_buff *skb;
1878         struct ieee80211_mgmt *mgmt;
1879         int ies_len;
1880         u32 rate_masks[NUM_NL80211_BANDS] = {};
1881         struct ieee80211_scan_ies dummy_ie_desc;
1882
1883         /*
1884          * Do not send DS Channel parameter for directed probe requests
1885          * in order to maximize the chance that we get a response.  Some
1886          * badly-behaved APs don't respond when this parameter is included.
1887          */
1888         chandef.width = sdata->vif.bss_conf.chandef.width;
1889         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1890                 chandef.chan = NULL;
1891         else
1892                 chandef.chan = chan;
1893
1894         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1895                                      100 + ie_len);
1896         if (!skb)
1897                 return NULL;
1898
1899         rate_masks[chan->band] = ratemask;
1900         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1901                                            skb_tailroom(skb), &dummy_ie_desc,
1902                                            ie, ie_len, BIT(chan->band),
1903                                            rate_masks, &chandef, flags);
1904         skb_put(skb, ies_len);
1905
1906         if (dst) {
1907                 mgmt = (struct ieee80211_mgmt *) skb->data;
1908                 memcpy(mgmt->da, dst, ETH_ALEN);
1909                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1910         }
1911
1912         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1913
1914         return skb;
1915 }
1916
1917 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1918                             struct ieee802_11_elems *elems,
1919                             enum nl80211_band band, u32 *basic_rates)
1920 {
1921         struct ieee80211_supported_band *sband;
1922         size_t num_rates;
1923         u32 supp_rates, rate_flags;
1924         int i, j, shift;
1925
1926         sband = sdata->local->hw.wiphy->bands[band];
1927         if (WARN_ON(!sband))
1928                 return 1;
1929
1930         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1931         shift = ieee80211_vif_get_shift(&sdata->vif);
1932
1933         num_rates = sband->n_bitrates;
1934         supp_rates = 0;
1935         for (i = 0; i < elems->supp_rates_len +
1936                      elems->ext_supp_rates_len; i++) {
1937                 u8 rate = 0;
1938                 int own_rate;
1939                 bool is_basic;
1940                 if (i < elems->supp_rates_len)
1941                         rate = elems->supp_rates[i];
1942                 else if (elems->ext_supp_rates)
1943                         rate = elems->ext_supp_rates
1944                                 [i - elems->supp_rates_len];
1945                 own_rate = 5 * (rate & 0x7f);
1946                 is_basic = !!(rate & 0x80);
1947
1948                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1949                         continue;
1950
1951                 for (j = 0; j < num_rates; j++) {
1952                         int brate;
1953                         if ((rate_flags & sband->bitrates[j].flags)
1954                             != rate_flags)
1955                                 continue;
1956
1957                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1958                                              1 << shift);
1959
1960                         if (brate == own_rate) {
1961                                 supp_rates |= BIT(j);
1962                                 if (basic_rates && is_basic)
1963                                         *basic_rates |= BIT(j);
1964                         }
1965                 }
1966         }
1967         return supp_rates;
1968 }
1969
1970 void ieee80211_stop_device(struct ieee80211_local *local)
1971 {
1972         ieee80211_led_radio(local, false);
1973         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1974
1975         cancel_work_sync(&local->reconfig_filter);
1976
1977         flush_workqueue(local->workqueue);
1978         drv_stop(local);
1979 }
1980
1981 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1982                                            bool aborted)
1983 {
1984         /* It's possible that we don't handle the scan completion in
1985          * time during suspend, so if it's still marked as completed
1986          * here, queue the work and flush it to clean things up.
1987          * Instead of calling the worker function directly here, we
1988          * really queue it to avoid potential races with other flows
1989          * scheduling the same work.
1990          */
1991         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1992                 /* If coming from reconfiguration failure, abort the scan so
1993                  * we don't attempt to continue a partial HW scan - which is
1994                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1995                  * completed scan, and a 5 GHz portion is still pending.
1996                  */
1997                 if (aborted)
1998                         set_bit(SCAN_ABORTED, &local->scanning);
1999                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2000                 flush_delayed_work(&local->scan_work);
2001         }
2002 }
2003
2004 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2005 {
2006         struct ieee80211_sub_if_data *sdata;
2007         struct ieee80211_chanctx *ctx;
2008
2009         /*
2010          * We get here if during resume the device can't be restarted properly.
2011          * We might also get here if this happens during HW reset, which is a
2012          * slightly different situation and we need to drop all connections in
2013          * the latter case.
2014          *
2015          * Ask cfg80211 to turn off all interfaces, this will result in more
2016          * warnings but at least we'll then get into a clean stopped state.
2017          */
2018
2019         local->resuming = false;
2020         local->suspended = false;
2021         local->in_reconfig = false;
2022
2023         ieee80211_flush_completed_scan(local, true);
2024
2025         /* scheduled scan clearly can't be running any more, but tell
2026          * cfg80211 and clear local state
2027          */
2028         ieee80211_sched_scan_end(local);
2029
2030         list_for_each_entry(sdata, &local->interfaces, list)
2031                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2032
2033         /* Mark channel contexts as not being in the driver any more to avoid
2034          * removing them from the driver during the shutdown process...
2035          */
2036         mutex_lock(&local->chanctx_mtx);
2037         list_for_each_entry(ctx, &local->chanctx_list, list)
2038                 ctx->driver_present = false;
2039         mutex_unlock(&local->chanctx_mtx);
2040
2041         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2042 }
2043
2044 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2045                                      struct ieee80211_sub_if_data *sdata)
2046 {
2047         struct ieee80211_chanctx_conf *conf;
2048         struct ieee80211_chanctx *ctx;
2049
2050         if (!local->use_chanctx)
2051                 return;
2052
2053         mutex_lock(&local->chanctx_mtx);
2054         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2055                                          lockdep_is_held(&local->chanctx_mtx));
2056         if (conf) {
2057                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2058                 drv_assign_vif_chanctx(local, sdata, ctx);
2059         }
2060         mutex_unlock(&local->chanctx_mtx);
2061 }
2062
2063 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2064 {
2065         struct ieee80211_local *local = sdata->local;
2066         struct sta_info *sta;
2067
2068         /* add STAs back */
2069         mutex_lock(&local->sta_mtx);
2070         list_for_each_entry(sta, &local->sta_list, list) {
2071                 enum ieee80211_sta_state state;
2072
2073                 if (!sta->uploaded || sta->sdata != sdata)
2074                         continue;
2075
2076                 for (state = IEEE80211_STA_NOTEXIST;
2077                      state < sta->sta_state; state++)
2078                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2079                                               state + 1));
2080         }
2081         mutex_unlock(&local->sta_mtx);
2082 }
2083
2084 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2085 {
2086         struct cfg80211_nan_func *func, **funcs;
2087         int res, id, i = 0;
2088
2089         res = drv_start_nan(sdata->local, sdata,
2090                             &sdata->u.nan.conf);
2091         if (WARN_ON(res))
2092                 return res;
2093
2094         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2095                         sizeof(*funcs),
2096                         GFP_KERNEL);
2097         if (!funcs)
2098                 return -ENOMEM;
2099
2100         /* Add all the functions:
2101          * This is a little bit ugly. We need to call a potentially sleeping
2102          * callback for each NAN function, so we can't hold the spinlock.
2103          */
2104         spin_lock_bh(&sdata->u.nan.func_lock);
2105
2106         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2107                 funcs[i++] = func;
2108
2109         spin_unlock_bh(&sdata->u.nan.func_lock);
2110
2111         for (i = 0; funcs[i]; i++) {
2112                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2113                 if (WARN_ON(res))
2114                         ieee80211_nan_func_terminated(&sdata->vif,
2115                                                       funcs[i]->instance_id,
2116                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2117                                                       GFP_KERNEL);
2118         }
2119
2120         kfree(funcs);
2121
2122         return 0;
2123 }
2124
2125 int ieee80211_reconfig(struct ieee80211_local *local)
2126 {
2127         struct ieee80211_hw *hw = &local->hw;
2128         struct ieee80211_sub_if_data *sdata;
2129         struct ieee80211_chanctx *ctx;
2130         struct sta_info *sta;
2131         int res, i;
2132         bool reconfig_due_to_wowlan = false;
2133         struct ieee80211_sub_if_data *sched_scan_sdata;
2134         struct cfg80211_sched_scan_request *sched_scan_req;
2135         bool sched_scan_stopped = false;
2136         bool suspended = local->suspended;
2137
2138         /* nothing to do if HW shouldn't run */
2139         if (!local->open_count)
2140                 goto wake_up;
2141
2142 #ifdef CONFIG_PM
2143         if (suspended)
2144                 local->resuming = true;
2145
2146         if (local->wowlan) {
2147                 /*
2148                  * In the wowlan case, both mac80211 and the device
2149                  * are functional when the resume op is called, so
2150                  * clear local->suspended so the device could operate
2151                  * normally (e.g. pass rx frames).
2152                  */
2153                 local->suspended = false;
2154                 res = drv_resume(local);
2155                 local->wowlan = false;
2156                 if (res < 0) {
2157                         local->resuming = false;
2158                         return res;
2159                 }
2160                 if (res == 0)
2161                         goto wake_up;
2162                 WARN_ON(res > 1);
2163                 /*
2164                  * res is 1, which means the driver requested
2165                  * to go through a regular reset on wakeup.
2166                  * restore local->suspended in this case.
2167                  */
2168                 reconfig_due_to_wowlan = true;
2169                 local->suspended = true;
2170         }
2171 #endif
2172
2173         /*
2174          * In case of hw_restart during suspend (without wowlan),
2175          * cancel restart work, as we are reconfiguring the device
2176          * anyway.
2177          * Note that restart_work is scheduled on a frozen workqueue,
2178          * so we can't deadlock in this case.
2179          */
2180         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2181                 cancel_work_sync(&local->restart_work);
2182
2183         local->started = false;
2184
2185         /*
2186          * Upon resume hardware can sometimes be goofy due to
2187          * various platform / driver / bus issues, so restarting
2188          * the device may at times not work immediately. Propagate
2189          * the error.
2190          */
2191         res = drv_start(local);
2192         if (res) {
2193                 if (suspended)
2194                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2195                 else
2196                         WARN(1, "Hardware became unavailable during restart.\n");
2197                 ieee80211_handle_reconfig_failure(local);
2198                 return res;
2199         }
2200
2201         /* setup fragmentation threshold */
2202         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2203
2204         /* setup RTS threshold */
2205         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2206
2207         /* reset coverage class */
2208         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2209
2210         ieee80211_led_radio(local, true);
2211         ieee80211_mod_tpt_led_trig(local,
2212                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2213
2214         /* add interfaces */
2215         sdata = rtnl_dereference(local->monitor_sdata);
2216         if (sdata) {
2217                 /* in HW restart it exists already */
2218                 WARN_ON(local->resuming);
2219                 res = drv_add_interface(local, sdata);
2220                 if (WARN_ON(res)) {
2221                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2222                         synchronize_net();
2223                         kfree(sdata);
2224                 }
2225         }
2226
2227         list_for_each_entry(sdata, &local->interfaces, list) {
2228                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2229                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2230                     ieee80211_sdata_running(sdata)) {
2231                         res = drv_add_interface(local, sdata);
2232                         if (WARN_ON(res))
2233                                 break;
2234                 }
2235         }
2236
2237         /* If adding any of the interfaces failed above, roll back and
2238          * report failure.
2239          */
2240         if (res) {
2241                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2242                                                      list)
2243                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2244                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2245                             ieee80211_sdata_running(sdata))
2246                                 drv_remove_interface(local, sdata);
2247                 ieee80211_handle_reconfig_failure(local);
2248                 return res;
2249         }
2250
2251         /* add channel contexts */
2252         if (local->use_chanctx) {
2253                 mutex_lock(&local->chanctx_mtx);
2254                 list_for_each_entry(ctx, &local->chanctx_list, list)
2255                         if (ctx->replace_state !=
2256                             IEEE80211_CHANCTX_REPLACES_OTHER)
2257                                 WARN_ON(drv_add_chanctx(local, ctx));
2258                 mutex_unlock(&local->chanctx_mtx);
2259
2260                 sdata = rtnl_dereference(local->monitor_sdata);
2261                 if (sdata && ieee80211_sdata_running(sdata))
2262                         ieee80211_assign_chanctx(local, sdata);
2263         }
2264
2265         /* reconfigure hardware */
2266         ieee80211_hw_config(local, ~0);
2267
2268         ieee80211_configure_filter(local);
2269
2270         /* Finally also reconfigure all the BSS information */
2271         list_for_each_entry(sdata, &local->interfaces, list) {
2272                 u32 changed;
2273
2274                 if (!ieee80211_sdata_running(sdata))
2275                         continue;
2276
2277                 ieee80211_assign_chanctx(local, sdata);
2278
2279                 switch (sdata->vif.type) {
2280                 case NL80211_IFTYPE_AP_VLAN:
2281                 case NL80211_IFTYPE_MONITOR:
2282                         break;
2283                 case NL80211_IFTYPE_ADHOC:
2284                         if (sdata->vif.bss_conf.ibss_joined)
2285                                 WARN_ON(drv_join_ibss(local, sdata));
2286                         /* fall through */
2287                 default:
2288                         ieee80211_reconfig_stations(sdata);
2289                         /* fall through */
2290                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2291                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2292                                 drv_conf_tx(local, sdata, i,
2293                                             &sdata->tx_conf[i]);
2294                         break;
2295                 }
2296
2297                 /* common change flags for all interface types */
2298                 changed = BSS_CHANGED_ERP_CTS_PROT |
2299                           BSS_CHANGED_ERP_PREAMBLE |
2300                           BSS_CHANGED_ERP_SLOT |
2301                           BSS_CHANGED_HT |
2302                           BSS_CHANGED_BASIC_RATES |
2303                           BSS_CHANGED_BEACON_INT |
2304                           BSS_CHANGED_BSSID |
2305                           BSS_CHANGED_CQM |
2306                           BSS_CHANGED_QOS |
2307                           BSS_CHANGED_IDLE |
2308                           BSS_CHANGED_TXPOWER |
2309                           BSS_CHANGED_MCAST_RATE;
2310
2311                 if (sdata->vif.mu_mimo_owner)
2312                         changed |= BSS_CHANGED_MU_GROUPS;
2313
2314                 switch (sdata->vif.type) {
2315                 case NL80211_IFTYPE_STATION:
2316                         changed |= BSS_CHANGED_ASSOC |
2317                                    BSS_CHANGED_ARP_FILTER |
2318                                    BSS_CHANGED_PS;
2319
2320                         /* Re-send beacon info report to the driver */
2321                         if (sdata->u.mgd.have_beacon)
2322                                 changed |= BSS_CHANGED_BEACON_INFO;
2323
2324                         if (sdata->vif.bss_conf.max_idle_period ||
2325                             sdata->vif.bss_conf.protected_keep_alive)
2326                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2327
2328                         sdata_lock(sdata);
2329                         ieee80211_bss_info_change_notify(sdata, changed);
2330                         sdata_unlock(sdata);
2331                         break;
2332                 case NL80211_IFTYPE_OCB:
2333                         changed |= BSS_CHANGED_OCB;
2334                         ieee80211_bss_info_change_notify(sdata, changed);
2335                         break;
2336                 case NL80211_IFTYPE_ADHOC:
2337                         changed |= BSS_CHANGED_IBSS;
2338                         /* fall through */
2339                 case NL80211_IFTYPE_AP:
2340                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2341
2342                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2343                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2344                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2345                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2346
2347                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2348                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2349
2350                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2351                                         drv_start_ap(local, sdata);
2352                         }
2353
2354                         /* fall through */
2355                 case NL80211_IFTYPE_MESH_POINT:
2356                         if (sdata->vif.bss_conf.enable_beacon) {
2357                                 changed |= BSS_CHANGED_BEACON |
2358                                            BSS_CHANGED_BEACON_ENABLED;
2359                                 ieee80211_bss_info_change_notify(sdata, changed);
2360                         }
2361                         break;
2362                 case NL80211_IFTYPE_NAN:
2363                         res = ieee80211_reconfig_nan(sdata);
2364                         if (res < 0) {
2365                                 ieee80211_handle_reconfig_failure(local);
2366                                 return res;
2367                         }
2368                         break;
2369                 case NL80211_IFTYPE_WDS:
2370                 case NL80211_IFTYPE_AP_VLAN:
2371                 case NL80211_IFTYPE_MONITOR:
2372                 case NL80211_IFTYPE_P2P_DEVICE:
2373                         /* nothing to do */
2374                         break;
2375                 case NL80211_IFTYPE_UNSPECIFIED:
2376                 case NUM_NL80211_IFTYPES:
2377                 case NL80211_IFTYPE_P2P_CLIENT:
2378                 case NL80211_IFTYPE_P2P_GO:
2379                         WARN_ON(1);
2380                         break;
2381                 }
2382         }
2383
2384         ieee80211_recalc_ps(local);
2385
2386         /*
2387          * The sta might be in psm against the ap (e.g. because
2388          * this was the state before a hw restart), so we
2389          * explicitly send a null packet in order to make sure
2390          * it'll sync against the ap (and get out of psm).
2391          */
2392         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2393                 list_for_each_entry(sdata, &local->interfaces, list) {
2394                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2395                                 continue;
2396                         if (!sdata->u.mgd.associated)
2397                                 continue;
2398
2399                         ieee80211_send_nullfunc(local, sdata, false);
2400                 }
2401         }
2402
2403         /* APs are now beaconing, add back stations */
2404         mutex_lock(&local->sta_mtx);
2405         list_for_each_entry(sta, &local->sta_list, list) {
2406                 enum ieee80211_sta_state state;
2407
2408                 if (!sta->uploaded)
2409                         continue;
2410
2411                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2412                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2413                         continue;
2414
2415                 for (state = IEEE80211_STA_NOTEXIST;
2416                      state < sta->sta_state; state++)
2417                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2418                                               state + 1));
2419         }
2420         mutex_unlock(&local->sta_mtx);
2421
2422         /* add back keys */
2423         list_for_each_entry(sdata, &local->interfaces, list)
2424                 ieee80211_reenable_keys(sdata);
2425
2426         /* Reconfigure sched scan if it was interrupted by FW restart */
2427         mutex_lock(&local->mtx);
2428         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2429                                                 lockdep_is_held(&local->mtx));
2430         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2431                                                 lockdep_is_held(&local->mtx));
2432         if (sched_scan_sdata && sched_scan_req)
2433                 /*
2434                  * Sched scan stopped, but we don't want to report it. Instead,
2435                  * we're trying to reschedule. However, if more than one scan
2436                  * plan was set, we cannot reschedule since we don't know which
2437                  * scan plan was currently running (and some scan plans may have
2438                  * already finished).
2439                  */
2440                 if (sched_scan_req->n_scan_plans > 1 ||
2441                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2442                                                          sched_scan_req)) {
2443                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2444                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2445                         sched_scan_stopped = true;
2446                 }
2447         mutex_unlock(&local->mtx);
2448
2449         if (sched_scan_stopped)
2450                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2451
2452  wake_up:
2453
2454         if (local->monitors == local->open_count && local->monitors > 0)
2455                 ieee80211_add_virtual_monitor(local);
2456
2457         /*
2458          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2459          * sessions can be established after a resume.
2460          *
2461          * Also tear down aggregation sessions since reconfiguring
2462          * them in a hardware restart scenario is not easily done
2463          * right now, and the hardware will have lost information
2464          * about the sessions, but we and the AP still think they
2465          * are active. This is really a workaround though.
2466          */
2467         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2468                 mutex_lock(&local->sta_mtx);
2469
2470                 list_for_each_entry(sta, &local->sta_list, list) {
2471                         if (!local->resuming)
2472                                 ieee80211_sta_tear_down_BA_sessions(
2473                                                 sta, AGG_STOP_LOCAL_REQUEST);
2474                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2475                 }
2476
2477                 mutex_unlock(&local->sta_mtx);
2478         }
2479
2480         if (local->in_reconfig) {
2481                 local->in_reconfig = false;
2482                 barrier();
2483
2484                 /* Restart deferred ROCs */
2485                 mutex_lock(&local->mtx);
2486                 ieee80211_start_next_roc(local);
2487                 mutex_unlock(&local->mtx);
2488
2489                 /* Requeue all works */
2490                 list_for_each_entry(sdata, &local->interfaces, list)
2491                         ieee80211_queue_work(&local->hw, &sdata->work);
2492         }
2493
2494         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2495                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2496                                         false);
2497
2498         /*
2499          * If this is for hw restart things are still running.
2500          * We may want to change that later, however.
2501          */
2502         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2503                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2504
2505         if (!suspended)
2506                 return 0;
2507
2508 #ifdef CONFIG_PM
2509         /* first set suspended false, then resuming */
2510         local->suspended = false;
2511         mb();
2512         local->resuming = false;
2513
2514         ieee80211_flush_completed_scan(local, false);
2515
2516         if (local->open_count && !reconfig_due_to_wowlan)
2517                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2518
2519         list_for_each_entry(sdata, &local->interfaces, list) {
2520                 if (!ieee80211_sdata_running(sdata))
2521                         continue;
2522                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2523                         ieee80211_sta_restart(sdata);
2524         }
2525
2526         mod_timer(&local->sta_cleanup, jiffies + 1);
2527 #else
2528         WARN_ON(1);
2529 #endif
2530
2531         return 0;
2532 }
2533
2534 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2535 {
2536         struct ieee80211_sub_if_data *sdata;
2537         struct ieee80211_local *local;
2538         struct ieee80211_key *key;
2539
2540         if (WARN_ON(!vif))
2541                 return;
2542
2543         sdata = vif_to_sdata(vif);
2544         local = sdata->local;
2545
2546         if (WARN_ON(!local->resuming))
2547                 return;
2548
2549         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2550                 return;
2551
2552         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2553
2554         mutex_lock(&local->key_mtx);
2555         list_for_each_entry(key, &sdata->key_list, list)
2556                 key->flags |= KEY_FLAG_TAINTED;
2557         mutex_unlock(&local->key_mtx);
2558 }
2559 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2560
2561 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2562 {
2563         struct ieee80211_local *local = sdata->local;
2564         struct ieee80211_chanctx_conf *chanctx_conf;
2565         struct ieee80211_chanctx *chanctx;
2566
2567         mutex_lock(&local->chanctx_mtx);
2568
2569         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2570                                         lockdep_is_held(&local->chanctx_mtx));
2571
2572         /*
2573          * This function can be called from a work, thus it may be possible
2574          * that the chanctx_conf is removed (due to a disconnection, for
2575          * example).
2576          * So nothing should be done in such case.
2577          */
2578         if (!chanctx_conf)
2579                 goto unlock;
2580
2581         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2582         ieee80211_recalc_smps_chanctx(local, chanctx);
2583  unlock:
2584         mutex_unlock(&local->chanctx_mtx);
2585 }
2586
2587 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2588 {
2589         struct ieee80211_local *local = sdata->local;
2590         struct ieee80211_chanctx_conf *chanctx_conf;
2591         struct ieee80211_chanctx *chanctx;
2592
2593         mutex_lock(&local->chanctx_mtx);
2594
2595         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2596                                         lockdep_is_held(&local->chanctx_mtx));
2597
2598         if (WARN_ON_ONCE(!chanctx_conf))
2599                 goto unlock;
2600
2601         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2602         ieee80211_recalc_chanctx_min_def(local, chanctx);
2603  unlock:
2604         mutex_unlock(&local->chanctx_mtx);
2605 }
2606
2607 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2608 {
2609         size_t pos = offset;
2610
2611         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2612                 pos += 2 + ies[pos + 1];
2613
2614         return pos;
2615 }
2616
2617 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2618                                             int rssi_min_thold,
2619                                             int rssi_max_thold)
2620 {
2621         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2622
2623         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2624                 return;
2625
2626         /*
2627          * Scale up threshold values before storing it, as the RSSI averaging
2628          * algorithm uses a scaled up value as well. Change this scaling
2629          * factor if the RSSI averaging algorithm changes.
2630          */
2631         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2632         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2633 }
2634
2635 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2636                                     int rssi_min_thold,
2637                                     int rssi_max_thold)
2638 {
2639         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2640
2641         WARN_ON(rssi_min_thold == rssi_max_thold ||
2642                 rssi_min_thold > rssi_max_thold);
2643
2644         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2645                                        rssi_max_thold);
2646 }
2647 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2648
2649 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2650 {
2651         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2652
2653         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2654 }
2655 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2656
2657 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2658                               u16 cap)
2659 {
2660         __le16 tmp;
2661
2662         *pos++ = WLAN_EID_HT_CAPABILITY;
2663         *pos++ = sizeof(struct ieee80211_ht_cap);
2664         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2665
2666         /* capability flags */
2667         tmp = cpu_to_le16(cap);
2668         memcpy(pos, &tmp, sizeof(u16));
2669         pos += sizeof(u16);
2670
2671         /* AMPDU parameters */
2672         *pos++ = ht_cap->ampdu_factor |
2673                  (ht_cap->ampdu_density <<
2674                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2675
2676         /* MCS set */
2677         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2678         pos += sizeof(ht_cap->mcs);
2679
2680         /* extended capabilities */
2681         pos += sizeof(__le16);
2682
2683         /* BF capabilities */
2684         pos += sizeof(__le32);
2685
2686         /* antenna selection */
2687         pos += sizeof(u8);
2688
2689         return pos;
2690 }
2691
2692 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2693                                u32 cap)
2694 {
2695         __le32 tmp;
2696
2697         *pos++ = WLAN_EID_VHT_CAPABILITY;
2698         *pos++ = sizeof(struct ieee80211_vht_cap);
2699         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2700
2701         /* capability flags */
2702         tmp = cpu_to_le32(cap);
2703         memcpy(pos, &tmp, sizeof(u32));
2704         pos += sizeof(u32);
2705
2706         /* VHT MCS set */
2707         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2708         pos += sizeof(vht_cap->vht_mcs);
2709
2710         return pos;
2711 }
2712
2713 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2714 {
2715         const struct ieee80211_sta_he_cap *he_cap;
2716         struct ieee80211_supported_band *sband;
2717         u8 n;
2718
2719         sband = ieee80211_get_sband(sdata);
2720         if (!sband)
2721                 return 0;
2722
2723         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2724         if (!he_cap)
2725                 return 0;
2726
2727         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2728         return 2 + 1 +
2729                sizeof(he_cap->he_cap_elem) + n +
2730                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2731                                      he_cap->he_cap_elem.phy_cap_info);
2732 }
2733
2734 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2735                               const struct ieee80211_sta_he_cap *he_cap,
2736                               u8 *end)
2737 {
2738         u8 n;
2739         u8 ie_len;
2740         u8 *orig_pos = pos;
2741
2742         /* Make sure we have place for the IE */
2743         /*
2744          * TODO: the 1 added is because this temporarily is under the EXTENSION
2745          * IE. Get rid of it when it moves.
2746          */
2747         if (!he_cap)
2748                 return orig_pos;
2749
2750         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2751         ie_len = 2 + 1 +
2752                  sizeof(he_cap->he_cap_elem) + n +
2753                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2754                                        he_cap->he_cap_elem.phy_cap_info);
2755
2756         if ((end - pos) < ie_len)
2757                 return orig_pos;
2758
2759         *pos++ = WLAN_EID_EXTENSION;
2760         pos++; /* We'll set the size later below */
2761         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2762
2763         /* Fixed data */
2764         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2765         pos += sizeof(he_cap->he_cap_elem);
2766
2767         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2768         pos += n;
2769
2770         /* Check if PPE Threshold should be present */
2771         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2772              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2773                 goto end;
2774
2775         /*
2776          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2777          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2778          */
2779         n = hweight8(he_cap->ppe_thres[0] &
2780                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2781         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2782                    IEEE80211_PPE_THRES_NSS_POS));
2783
2784         /*
2785          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2786          * total size.
2787          */
2788         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2789         n = DIV_ROUND_UP(n, 8);
2790
2791         /* Copy PPE Thresholds */
2792         memcpy(pos, &he_cap->ppe_thres, n);
2793         pos += n;
2794
2795 end:
2796         orig_pos[1] = (pos - orig_pos) - 2;
2797         return pos;
2798 }
2799
2800 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2801                                const struct cfg80211_chan_def *chandef,
2802                                u16 prot_mode, bool rifs_mode)
2803 {
2804         struct ieee80211_ht_operation *ht_oper;
2805         /* Build HT Information */
2806         *pos++ = WLAN_EID_HT_OPERATION;
2807         *pos++ = sizeof(struct ieee80211_ht_operation);
2808         ht_oper = (struct ieee80211_ht_operation *)pos;
2809         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2810                                         chandef->chan->center_freq);
2811         switch (chandef->width) {
2812         case NL80211_CHAN_WIDTH_160:
2813         case NL80211_CHAN_WIDTH_80P80:
2814         case NL80211_CHAN_WIDTH_80:
2815         case NL80211_CHAN_WIDTH_40:
2816                 if (chandef->center_freq1 > chandef->chan->center_freq)
2817                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2818                 else
2819                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2820                 break;
2821         default:
2822                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2823                 break;
2824         }
2825         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2826             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2827             chandef->width != NL80211_CHAN_WIDTH_20)
2828                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2829
2830         if (rifs_mode)
2831                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2832
2833         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2834         ht_oper->stbc_param = 0x0000;
2835
2836         /* It seems that Basic MCS set and Supported MCS set
2837            are identical for the first 10 bytes */
2838         memset(&ht_oper->basic_set, 0, 16);
2839         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2840
2841         return pos + sizeof(struct ieee80211_ht_operation);
2842 }
2843
2844 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2845                                    const struct cfg80211_chan_def *chandef)
2846 {
2847         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2848         *pos++ = 3;                                     /* IE length */
2849         /* New channel width */
2850         switch (chandef->width) {
2851         case NL80211_CHAN_WIDTH_80:
2852                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2853                 break;
2854         case NL80211_CHAN_WIDTH_160:
2855                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2856                 break;
2857         case NL80211_CHAN_WIDTH_80P80:
2858                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2859                 break;
2860         default:
2861                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2862         }
2863
2864         /* new center frequency segment 0 */
2865         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2866         /* new center frequency segment 1 */
2867         if (chandef->center_freq2)
2868                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2869         else
2870                 *pos++ = 0;
2871 }
2872
2873 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2874                                 const struct cfg80211_chan_def *chandef)
2875 {
2876         struct ieee80211_vht_operation *vht_oper;
2877
2878         *pos++ = WLAN_EID_VHT_OPERATION;
2879         *pos++ = sizeof(struct ieee80211_vht_operation);
2880         vht_oper = (struct ieee80211_vht_operation *)pos;
2881         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2882                                                         chandef->center_freq1);
2883         if (chandef->center_freq2)
2884                 vht_oper->center_freq_seg1_idx =
2885                         ieee80211_frequency_to_channel(chandef->center_freq2);
2886         else
2887                 vht_oper->center_freq_seg1_idx = 0x00;
2888
2889         switch (chandef->width) {
2890         case NL80211_CHAN_WIDTH_160:
2891                 /*
2892                  * Convert 160 MHz channel width to new style as interop
2893                  * workaround.
2894                  */
2895                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2896                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2897                 if (chandef->chan->center_freq < chandef->center_freq1)
2898                         vht_oper->center_freq_seg0_idx -= 8;
2899                 else
2900                         vht_oper->center_freq_seg0_idx += 8;
2901                 break;
2902         case NL80211_CHAN_WIDTH_80P80:
2903                 /*
2904                  * Convert 80+80 MHz channel width to new style as interop
2905                  * workaround.
2906                  */
2907                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2908                 break;
2909         case NL80211_CHAN_WIDTH_80:
2910                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2911                 break;
2912         default:
2913                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2914                 break;
2915         }
2916
2917         /* don't require special VHT peer rates */
2918         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2919
2920         return pos + sizeof(struct ieee80211_vht_operation);
2921 }
2922
2923 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2924 {
2925         struct ieee80211_he_operation *he_oper;
2926         u32 he_oper_params;
2927
2928         *pos++ = WLAN_EID_EXTENSION;
2929         *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2930         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2931
2932         he_oper_params = 0;
2933         he_oper_params |= u32_encode_bits(1023, /* disabled */
2934                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2935         he_oper_params |= u32_encode_bits(1,
2936                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2937         he_oper_params |= u32_encode_bits(1,
2938                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2939
2940         he_oper = (struct ieee80211_he_operation *)pos;
2941         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2942
2943         /* don't require special HE peer rates */
2944         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2945
2946         /* TODO add VHT operational and 6GHz operational subelement? */
2947
2948         return pos + sizeof(struct ieee80211_vht_operation);
2949 }
2950
2951 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2952                                struct cfg80211_chan_def *chandef)
2953 {
2954         enum nl80211_channel_type channel_type;
2955
2956         if (!ht_oper)
2957                 return false;
2958
2959         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2960         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2961                 channel_type = NL80211_CHAN_HT20;
2962                 break;
2963         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2964                 channel_type = NL80211_CHAN_HT40PLUS;
2965                 break;
2966         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2967                 channel_type = NL80211_CHAN_HT40MINUS;
2968                 break;
2969         default:
2970                 channel_type = NL80211_CHAN_NO_HT;
2971                 return false;
2972         }
2973
2974         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2975         return true;
2976 }
2977
2978 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2979                                 const struct ieee80211_vht_operation *oper,
2980                                 const struct ieee80211_ht_operation *htop,
2981                                 struct cfg80211_chan_def *chandef)
2982 {
2983         struct cfg80211_chan_def new = *chandef;
2984         int cf0, cf1;
2985         int ccfs0, ccfs1, ccfs2;
2986         int ccf0, ccf1;
2987
2988         if (!oper || !htop)
2989                 return false;
2990
2991         ccfs0 = oper->center_freq_seg0_idx;
2992         ccfs1 = oper->center_freq_seg1_idx;
2993         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2994                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2995                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2996
2997         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2998         ccf0 = ccfs0;
2999         ccf1 = ccfs1;
3000         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3001                 ccf1 = ccfs2;
3002
3003         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3004         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3005
3006         switch (oper->chan_width) {
3007         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3008                 /* just use HT information directly */
3009                 break;
3010         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3011                 new.width = NL80211_CHAN_WIDTH_80;
3012                 new.center_freq1 = cf0;
3013                 /* If needed, adjust based on the newer interop workaround. */
3014                 if (ccf1) {
3015                         unsigned int diff;
3016
3017                         diff = abs(ccf1 - ccf0);
3018                         if (diff == 8) {
3019                                 new.width = NL80211_CHAN_WIDTH_160;
3020                                 new.center_freq1 = cf1;
3021                         } else if (diff > 8) {
3022                                 new.width = NL80211_CHAN_WIDTH_80P80;
3023                                 new.center_freq2 = cf1;
3024                         }
3025                 }
3026                 break;
3027         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3028                 /* deprecated encoding */
3029                 new.width = NL80211_CHAN_WIDTH_160;
3030                 new.center_freq1 = cf0;
3031                 break;
3032         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3033                 /* deprecated encoding */
3034                 new.width = NL80211_CHAN_WIDTH_80P80;
3035                 new.center_freq1 = cf0;
3036                 new.center_freq2 = cf1;
3037                 break;
3038         default:
3039                 return false;
3040         }
3041
3042         if (!cfg80211_chandef_valid(&new))
3043                 return false;
3044
3045         *chandef = new;
3046         return true;
3047 }
3048
3049 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3050                              const struct ieee80211_supported_band *sband,
3051                              const u8 *srates, int srates_len, u32 *rates)
3052 {
3053         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3054         int shift = ieee80211_chandef_get_shift(chandef);
3055         struct ieee80211_rate *br;
3056         int brate, rate, i, j, count = 0;
3057
3058         *rates = 0;
3059
3060         for (i = 0; i < srates_len; i++) {
3061                 rate = srates[i] & 0x7f;
3062
3063                 for (j = 0; j < sband->n_bitrates; j++) {
3064                         br = &sband->bitrates[j];
3065                         if ((rate_flags & br->flags) != rate_flags)
3066                                 continue;
3067
3068                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3069                         if (brate == rate) {
3070                                 *rates |= BIT(j);
3071                                 count++;
3072                                 break;
3073                         }
3074                 }
3075         }
3076         return count;
3077 }
3078
3079 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3080                             struct sk_buff *skb, bool need_basic,
3081                             enum nl80211_band band)
3082 {
3083         struct ieee80211_local *local = sdata->local;
3084         struct ieee80211_supported_band *sband;
3085         int rate, shift;
3086         u8 i, rates, *pos;
3087         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3088         u32 rate_flags;
3089
3090         shift = ieee80211_vif_get_shift(&sdata->vif);
3091         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3092         sband = local->hw.wiphy->bands[band];
3093         rates = 0;
3094         for (i = 0; i < sband->n_bitrates; i++) {
3095                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3096                         continue;
3097                 rates++;
3098         }
3099         if (rates > 8)
3100                 rates = 8;
3101
3102         if (skb_tailroom(skb) < rates + 2)
3103                 return -ENOMEM;
3104
3105         pos = skb_put(skb, rates + 2);
3106         *pos++ = WLAN_EID_SUPP_RATES;
3107         *pos++ = rates;
3108         for (i = 0; i < rates; i++) {
3109                 u8 basic = 0;
3110                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3111                         continue;
3112
3113                 if (need_basic && basic_rates & BIT(i))
3114                         basic = 0x80;
3115                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3116                                     5 * (1 << shift));
3117                 *pos++ = basic | (u8) rate;
3118         }
3119
3120         return 0;
3121 }
3122
3123 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3124                                 struct sk_buff *skb, bool need_basic,
3125                                 enum nl80211_band band)
3126 {
3127         struct ieee80211_local *local = sdata->local;
3128         struct ieee80211_supported_band *sband;
3129         int rate, shift;
3130         u8 i, exrates, *pos;
3131         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3132         u32 rate_flags;
3133
3134         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3135         shift = ieee80211_vif_get_shift(&sdata->vif);
3136
3137         sband = local->hw.wiphy->bands[band];
3138         exrates = 0;
3139         for (i = 0; i < sband->n_bitrates; i++) {
3140                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3141                         continue;
3142                 exrates++;
3143         }
3144
3145         if (exrates > 8)
3146                 exrates -= 8;
3147         else
3148                 exrates = 0;
3149
3150         if (skb_tailroom(skb) < exrates + 2)
3151                 return -ENOMEM;
3152
3153         if (exrates) {
3154                 pos = skb_put(skb, exrates + 2);
3155                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3156                 *pos++ = exrates;
3157                 for (i = 8; i < sband->n_bitrates; i++) {
3158                         u8 basic = 0;
3159                         if ((rate_flags & sband->bitrates[i].flags)
3160                             != rate_flags)
3161                                 continue;
3162                         if (need_basic && basic_rates & BIT(i))
3163                                 basic = 0x80;
3164                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3165                                             5 * (1 << shift));
3166                         *pos++ = basic | (u8) rate;
3167                 }
3168         }
3169         return 0;
3170 }
3171
3172 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3173 {
3174         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3175         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3176
3177         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3178                 /* non-managed type inferfaces */
3179                 return 0;
3180         }
3181         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3182 }
3183 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3184
3185 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3186 {
3187         if (!mcs)
3188                 return 1;
3189
3190         /* TODO: consider rx_highest */
3191
3192         if (mcs->rx_mask[3])
3193                 return 4;
3194         if (mcs->rx_mask[2])
3195                 return 3;
3196         if (mcs->rx_mask[1])
3197                 return 2;
3198         return 1;
3199 }
3200
3201 /**
3202  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3203  * @local: mac80211 hw info struct
3204  * @status: RX status
3205  * @mpdu_len: total MPDU length (including FCS)
3206  * @mpdu_offset: offset into MPDU to calculate timestamp at
3207  *
3208  * This function calculates the RX timestamp at the given MPDU offset, taking
3209  * into account what the RX timestamp was. An offset of 0 will just normalize
3210  * the timestamp to TSF at beginning of MPDU reception.
3211  */
3212 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3213                                      struct ieee80211_rx_status *status,
3214                                      unsigned int mpdu_len,
3215                                      unsigned int mpdu_offset)
3216 {
3217         u64 ts = status->mactime;
3218         struct rate_info ri;
3219         u16 rate;
3220
3221         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3222                 return 0;
3223
3224         memset(&ri, 0, sizeof(ri));
3225
3226         ri.bw = status->bw;
3227
3228         /* Fill cfg80211 rate info */
3229         switch (status->encoding) {
3230         case RX_ENC_HT:
3231                 ri.mcs = status->rate_idx;
3232                 ri.flags |= RATE_INFO_FLAGS_MCS;
3233                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3234                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3235                 break;
3236         case RX_ENC_VHT:
3237                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3238                 ri.mcs = status->rate_idx;
3239                 ri.nss = status->nss;
3240                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3241                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3242                 break;
3243         default:
3244                 WARN_ON(1);
3245                 /* fall through */
3246         case RX_ENC_LEGACY: {
3247                 struct ieee80211_supported_band *sband;
3248                 int shift = 0;
3249                 int bitrate;
3250
3251                 switch (status->bw) {
3252                 case RATE_INFO_BW_10:
3253                         shift = 1;
3254                         break;
3255                 case RATE_INFO_BW_5:
3256                         shift = 2;
3257                         break;
3258                 }
3259
3260                 sband = local->hw.wiphy->bands[status->band];
3261                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3262                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3263
3264                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3265                         /* TODO: handle HT/VHT preambles */
3266                         if (status->band == NL80211_BAND_5GHZ) {
3267                                 ts += 20 << shift;
3268                                 mpdu_offset += 2;
3269                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3270                                 ts += 96;
3271                         } else {
3272                                 ts += 192;
3273                         }
3274                 }
3275                 break;
3276                 }
3277         }
3278
3279         rate = cfg80211_calculate_bitrate(&ri);
3280         if (WARN_ONCE(!rate,
3281                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3282                       (unsigned long long)status->flag, status->rate_idx,
3283                       status->nss))
3284                 return 0;
3285
3286         /* rewind from end of MPDU */
3287         if (status->flag & RX_FLAG_MACTIME_END)
3288                 ts -= mpdu_len * 8 * 10 / rate;
3289
3290         ts += mpdu_offset * 8 * 10 / rate;
3291
3292         return ts;
3293 }
3294
3295 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3296 {
3297         struct ieee80211_sub_if_data *sdata;
3298         struct cfg80211_chan_def chandef;
3299
3300         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3301         ASSERT_RTNL();
3302
3303         mutex_lock(&local->mtx);
3304         list_for_each_entry(sdata, &local->interfaces, list) {
3305                 /* it might be waiting for the local->mtx, but then
3306                  * by the time it gets it, sdata->wdev.cac_started
3307                  * will no longer be true
3308                  */
3309                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3310
3311                 if (sdata->wdev.cac_started) {
3312                         chandef = sdata->vif.bss_conf.chandef;
3313                         ieee80211_vif_release_channel(sdata);
3314                         cfg80211_cac_event(sdata->dev,
3315                                            &chandef,
3316                                            NL80211_RADAR_CAC_ABORTED,
3317                                            GFP_KERNEL);
3318                 }
3319         }
3320         mutex_unlock(&local->mtx);
3321 }
3322
3323 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3324 {
3325         struct ieee80211_local *local =
3326                 container_of(work, struct ieee80211_local, radar_detected_work);
3327         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3328         struct ieee80211_chanctx *ctx;
3329         int num_chanctx = 0;
3330
3331         mutex_lock(&local->chanctx_mtx);
3332         list_for_each_entry(ctx, &local->chanctx_list, list) {
3333                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3334                         continue;
3335
3336                 num_chanctx++;
3337                 chandef = ctx->conf.def;
3338         }
3339         mutex_unlock(&local->chanctx_mtx);
3340
3341         rtnl_lock();
3342         ieee80211_dfs_cac_cancel(local);
3343         rtnl_unlock();
3344
3345         if (num_chanctx > 1)
3346                 /* XXX: multi-channel is not supported yet */
3347                 WARN_ON(1);
3348         else
3349                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3350 }
3351
3352 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3353 {
3354         struct ieee80211_local *local = hw_to_local(hw);
3355
3356         trace_api_radar_detected(local);
3357
3358         schedule_work(&local->radar_detected_work);
3359 }
3360 EXPORT_SYMBOL(ieee80211_radar_detected);
3361
3362 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3363 {
3364         u32 ret;
3365         int tmp;
3366
3367         switch (c->width) {
3368         case NL80211_CHAN_WIDTH_20:
3369                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3370                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3371                 break;
3372         case NL80211_CHAN_WIDTH_40:
3373                 c->width = NL80211_CHAN_WIDTH_20;
3374                 c->center_freq1 = c->chan->center_freq;
3375                 ret = IEEE80211_STA_DISABLE_40MHZ |
3376                       IEEE80211_STA_DISABLE_VHT;
3377                 break;
3378         case NL80211_CHAN_WIDTH_80:
3379                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3380                 /* n_P40 */
3381                 tmp /= 2;
3382                 /* freq_P40 */
3383                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3384                 c->width = NL80211_CHAN_WIDTH_40;
3385                 ret = IEEE80211_STA_DISABLE_VHT;
3386                 break;
3387         case NL80211_CHAN_WIDTH_80P80:
3388                 c->center_freq2 = 0;
3389                 c->width = NL80211_CHAN_WIDTH_80;
3390                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3391                       IEEE80211_STA_DISABLE_160MHZ;
3392                 break;
3393         case NL80211_CHAN_WIDTH_160:
3394                 /* n_P20 */
3395                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3396                 /* n_P80 */
3397                 tmp /= 4;
3398                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3399                 c->width = NL80211_CHAN_WIDTH_80;
3400                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3401                       IEEE80211_STA_DISABLE_160MHZ;
3402                 break;
3403         default:
3404         case NL80211_CHAN_WIDTH_20_NOHT:
3405                 WARN_ON_ONCE(1);
3406                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3407                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3408                 break;
3409         case NL80211_CHAN_WIDTH_5:
3410         case NL80211_CHAN_WIDTH_10:
3411                 WARN_ON_ONCE(1);
3412                 /* keep c->width */
3413                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3414                 break;
3415         }
3416
3417         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3418
3419         return ret;
3420 }
3421
3422 /*
3423  * Returns true if smps_mode_new is strictly more restrictive than
3424  * smps_mode_old.
3425  */
3426 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3427                                    enum ieee80211_smps_mode smps_mode_new)
3428 {
3429         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3430                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3431                 return false;
3432
3433         switch (smps_mode_old) {
3434         case IEEE80211_SMPS_STATIC:
3435                 return false;
3436         case IEEE80211_SMPS_DYNAMIC:
3437                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3438         case IEEE80211_SMPS_OFF:
3439                 return smps_mode_new != IEEE80211_SMPS_OFF;
3440         default:
3441                 WARN_ON(1);
3442         }
3443
3444         return false;
3445 }
3446
3447 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3448                               struct cfg80211_csa_settings *csa_settings)
3449 {
3450         struct sk_buff *skb;
3451         struct ieee80211_mgmt *mgmt;
3452         struct ieee80211_local *local = sdata->local;
3453         int freq;
3454         int hdr_len = offsetofend(struct ieee80211_mgmt,
3455                                   u.action.u.chan_switch);
3456         u8 *pos;
3457
3458         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3459             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3460                 return -EOPNOTSUPP;
3461
3462         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3463                             5 + /* channel switch announcement element */
3464                             3 + /* secondary channel offset element */
3465                             5 + /* wide bandwidth channel switch announcement */
3466                             8); /* mesh channel switch parameters element */
3467         if (!skb)
3468                 return -ENOMEM;
3469
3470         skb_reserve(skb, local->tx_headroom);
3471         mgmt = skb_put_zero(skb, hdr_len);
3472         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3473                                           IEEE80211_STYPE_ACTION);
3474
3475         eth_broadcast_addr(mgmt->da);
3476         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3477         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3478                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3479         } else {
3480                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3481                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3482         }
3483         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3484         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3485         pos = skb_put(skb, 5);
3486         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3487         *pos++ = 3;                                             /* IE length */
3488         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3489         freq = csa_settings->chandef.chan->center_freq;
3490         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3491         *pos++ = csa_settings->count;                           /* count */
3492
3493         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3494                 enum nl80211_channel_type ch_type;
3495
3496                 skb_put(skb, 3);
3497                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3498                 *pos++ = 1;                                     /* IE length */
3499                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3500                 if (ch_type == NL80211_CHAN_HT40PLUS)
3501                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3502                 else
3503                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3504         }
3505
3506         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3507                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3508
3509                 skb_put(skb, 8);
3510                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3511                 *pos++ = 6;                                     /* IE length */
3512                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3513                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3514                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3515                 *pos++ |= csa_settings->block_tx ?
3516                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3517                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3518                 pos += 2;
3519                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3520                 pos += 2;
3521         }
3522
3523         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3524             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3525             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3526                 skb_put(skb, 5);
3527                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3528         }
3529
3530         ieee80211_tx_skb(sdata, skb);
3531         return 0;
3532 }
3533
3534 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3535 {
3536         return !(cs == NULL || cs->cipher == 0 ||
3537                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3538                  cs->hdr_len <= cs->key_idx_off ||
3539                  cs->key_idx_shift > 7 ||
3540                  cs->key_idx_mask == 0);
3541 }
3542
3543 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3544 {
3545         int i;
3546
3547         /* Ensure we have enough iftype bitmap space for all iftype values */
3548         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3549
3550         for (i = 0; i < n; i++)
3551                 if (!ieee80211_cs_valid(&cs[i]))
3552                         return false;
3553
3554         return true;
3555 }
3556
3557 const struct ieee80211_cipher_scheme *
3558 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3559                  enum nl80211_iftype iftype)
3560 {
3561         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3562         int n = local->hw.n_cipher_schemes;
3563         int i;
3564         const struct ieee80211_cipher_scheme *cs = NULL;
3565
3566         for (i = 0; i < n; i++) {
3567                 if (l[i].cipher == cipher) {
3568                         cs = &l[i];
3569                         break;
3570                 }
3571         }
3572
3573         if (!cs || !(cs->iftype & BIT(iftype)))
3574                 return NULL;
3575
3576         return cs;
3577 }
3578
3579 int ieee80211_cs_headroom(struct ieee80211_local *local,
3580                           struct cfg80211_crypto_settings *crypto,
3581                           enum nl80211_iftype iftype)
3582 {
3583         const struct ieee80211_cipher_scheme *cs;
3584         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3585         int i;
3586
3587         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3588                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3589                                       iftype);
3590
3591                 if (cs && headroom < cs->hdr_len)
3592                         headroom = cs->hdr_len;
3593         }
3594
3595         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3596         if (cs && headroom < cs->hdr_len)
3597                 headroom = cs->hdr_len;
3598
3599         return headroom;
3600 }
3601
3602 static bool
3603 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3604 {
3605         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3606         int skip;
3607
3608         if (end > 0)
3609                 return false;
3610
3611         /* One shot NOA  */
3612         if (data->count[i] == 1)
3613                 return false;
3614
3615         if (data->desc[i].interval == 0)
3616                 return false;
3617
3618         /* End time is in the past, check for repetitions */
3619         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3620         if (data->count[i] < 255) {
3621                 if (data->count[i] <= skip) {
3622                         data->count[i] = 0;
3623                         return false;
3624                 }
3625
3626                 data->count[i] -= skip;
3627         }
3628
3629         data->desc[i].start += skip * data->desc[i].interval;
3630
3631         return true;
3632 }
3633
3634 static bool
3635 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3636                              s32 *offset)
3637 {
3638         bool ret = false;
3639         int i;
3640
3641         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3642                 s32 cur;
3643
3644                 if (!data->count[i])
3645                         continue;
3646
3647                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3648                         ret = true;
3649
3650                 cur = data->desc[i].start - tsf;
3651                 if (cur > *offset)
3652                         continue;
3653
3654                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3655                 if (cur > *offset)
3656                         *offset = cur;
3657         }
3658
3659         return ret;
3660 }
3661
3662 static u32
3663 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3664 {
3665         s32 offset = 0;
3666         int tries = 0;
3667         /*
3668          * arbitrary limit, used to avoid infinite loops when combined NoA
3669          * descriptors cover the full time period.
3670          */
3671         int max_tries = 5;
3672
3673         ieee80211_extend_absent_time(data, tsf, &offset);
3674         do {
3675                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3676                         break;
3677
3678                 tries++;
3679         } while (tries < max_tries);
3680
3681         return offset;
3682 }
3683
3684 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3685 {
3686         u32 next_offset = BIT(31) - 1;
3687         int i;
3688
3689         data->absent = 0;
3690         data->has_next_tsf = false;
3691         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3692                 s32 start;
3693
3694                 if (!data->count[i])
3695                         continue;
3696
3697                 ieee80211_extend_noa_desc(data, tsf, i);
3698                 start = data->desc[i].start - tsf;
3699                 if (start <= 0)
3700                         data->absent |= BIT(i);
3701
3702                 if (next_offset > start)
3703                         next_offset = start;
3704
3705                 data->has_next_tsf = true;
3706         }
3707
3708         if (data->absent)
3709                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3710
3711         data->next_tsf = tsf + next_offset;
3712 }
3713 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3714
3715 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3716                             struct ieee80211_noa_data *data, u32 tsf)
3717 {
3718         int ret = 0;
3719         int i;
3720
3721         memset(data, 0, sizeof(*data));
3722
3723         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3724                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3725
3726                 if (!desc->count || !desc->duration)
3727                         continue;
3728
3729                 data->count[i] = desc->count;
3730                 data->desc[i].start = le32_to_cpu(desc->start_time);
3731                 data->desc[i].duration = le32_to_cpu(desc->duration);
3732                 data->desc[i].interval = le32_to_cpu(desc->interval);
3733
3734                 if (data->count[i] > 1 &&
3735                     data->desc[i].interval < data->desc[i].duration)
3736                         continue;
3737
3738                 ieee80211_extend_noa_desc(data, tsf, i);
3739                 ret++;
3740         }
3741
3742         if (ret)
3743                 ieee80211_update_p2p_noa(data, tsf);
3744
3745         return ret;
3746 }
3747 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3748
3749 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3750                            struct ieee80211_sub_if_data *sdata)
3751 {
3752         u64 tsf = drv_get_tsf(local, sdata);
3753         u64 dtim_count = 0;
3754         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3755         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3756         struct ps_data *ps;
3757         u8 bcns_from_dtim;
3758
3759         if (tsf == -1ULL || !beacon_int || !dtim_period)
3760                 return;
3761
3762         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3763             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3764                 if (!sdata->bss)
3765                         return;
3766
3767                 ps = &sdata->bss->ps;
3768         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3769                 ps = &sdata->u.mesh.ps;
3770         } else {
3771                 return;
3772         }
3773
3774         /*
3775          * actually finds last dtim_count, mac80211 will update in
3776          * __beacon_add_tim().
3777          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3778          */
3779         do_div(tsf, beacon_int);
3780         bcns_from_dtim = do_div(tsf, dtim_period);
3781         /* just had a DTIM */
3782         if (!bcns_from_dtim)
3783                 dtim_count = 0;
3784         else
3785                 dtim_count = dtim_period - bcns_from_dtim;
3786
3787         ps->dtim_count = dtim_count;
3788 }
3789
3790 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3791                                          struct ieee80211_chanctx *ctx)
3792 {
3793         struct ieee80211_sub_if_data *sdata;
3794         u8 radar_detect = 0;
3795
3796         lockdep_assert_held(&local->chanctx_mtx);
3797
3798         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3799                 return 0;
3800
3801         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3802                 if (sdata->reserved_radar_required)
3803                         radar_detect |= BIT(sdata->reserved_chandef.width);
3804
3805         /*
3806          * An in-place reservation context should not have any assigned vifs
3807          * until it replaces the other context.
3808          */
3809         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3810                 !list_empty(&ctx->assigned_vifs));
3811
3812         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3813                 if (sdata->radar_required)
3814                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3815
3816         return radar_detect;
3817 }
3818
3819 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3820                                  const struct cfg80211_chan_def *chandef,
3821                                  enum ieee80211_chanctx_mode chanmode,
3822                                  u8 radar_detect)
3823 {
3824         struct ieee80211_local *local = sdata->local;
3825         struct ieee80211_sub_if_data *sdata_iter;
3826         enum nl80211_iftype iftype = sdata->wdev.iftype;
3827         struct ieee80211_chanctx *ctx;
3828         int total = 1;
3829         struct iface_combination_params params = {
3830                 .radar_detect = radar_detect,
3831         };
3832
3833         lockdep_assert_held(&local->chanctx_mtx);
3834
3835         if (WARN_ON(hweight32(radar_detect) > 1))
3836                 return -EINVAL;
3837
3838         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3839                     !chandef->chan))
3840                 return -EINVAL;
3841
3842         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3843                 return -EINVAL;
3844
3845         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3846             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3847                 /*
3848                  * always passing this is harmless, since it'll be the
3849                  * same value that cfg80211 finds if it finds the same
3850                  * interface ... and that's always allowed
3851                  */
3852                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3853         }
3854
3855         /* Always allow software iftypes */
3856         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3857                 if (radar_detect)
3858                         return -EINVAL;
3859                 return 0;
3860         }
3861
3862         if (chandef)
3863                 params.num_different_channels = 1;
3864
3865         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3866                 params.iftype_num[iftype] = 1;
3867
3868         list_for_each_entry(ctx, &local->chanctx_list, list) {
3869                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3870                         continue;
3871                 params.radar_detect |=
3872                         ieee80211_chanctx_radar_detect(local, ctx);
3873                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3874                         params.num_different_channels++;
3875                         continue;
3876                 }
3877                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3878                     cfg80211_chandef_compatible(chandef,
3879                                                 &ctx->conf.def))
3880                         continue;
3881                 params.num_different_channels++;
3882         }
3883
3884         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3885                 struct wireless_dev *wdev_iter;
3886
3887                 wdev_iter = &sdata_iter->wdev;
3888
3889                 if (sdata_iter == sdata ||
3890                     !ieee80211_sdata_running(sdata_iter) ||
3891                     cfg80211_iftype_allowed(local->hw.wiphy,
3892                                             wdev_iter->iftype, 0, 1))
3893                         continue;
3894
3895                 params.iftype_num[wdev_iter->iftype]++;
3896                 total++;
3897         }
3898
3899         if (total == 1 && !params.radar_detect)
3900                 return 0;
3901
3902         return cfg80211_check_combinations(local->hw.wiphy, &params);
3903 }
3904
3905 static void
3906 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3907                          void *data)
3908 {
3909         u32 *max_num_different_channels = data;
3910
3911         *max_num_different_channels = max(*max_num_different_channels,
3912                                           c->num_different_channels);
3913 }
3914
3915 int ieee80211_max_num_channels(struct ieee80211_local *local)
3916 {
3917         struct ieee80211_sub_if_data *sdata;
3918         struct ieee80211_chanctx *ctx;
3919         u32 max_num_different_channels = 1;
3920         int err;
3921         struct iface_combination_params params = {0};
3922
3923         lockdep_assert_held(&local->chanctx_mtx);
3924
3925         list_for_each_entry(ctx, &local->chanctx_list, list) {
3926                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3927                         continue;
3928
3929                 params.num_different_channels++;
3930
3931                 params.radar_detect |=
3932                         ieee80211_chanctx_radar_detect(local, ctx);
3933         }
3934
3935         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3936                 params.iftype_num[sdata->wdev.iftype]++;
3937
3938         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3939                                          ieee80211_iter_max_chans,
3940                                          &max_num_different_channels);
3941         if (err < 0)
3942                 return err;
3943
3944         return max_num_different_channels;
3945 }
3946
3947 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3948 {
3949         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3950         *buf++ = 7; /* len */
3951         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3952         *buf++ = 0x50;
3953         *buf++ = 0xf2;
3954         *buf++ = 2; /* WME */
3955         *buf++ = 0; /* WME info */
3956         *buf++ = 1; /* WME ver */
3957         *buf++ = qosinfo; /* U-APSD no in use */
3958
3959         return buf;
3960 }
3961
3962 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3963                              unsigned long *frame_cnt,
3964                              unsigned long *byte_cnt)
3965 {
3966         struct txq_info *txqi = to_txq_info(txq);
3967         u32 frag_cnt = 0, frag_bytes = 0;
3968         struct sk_buff *skb;
3969
3970         skb_queue_walk(&txqi->frags, skb) {
3971                 frag_cnt++;
3972                 frag_bytes += skb->len;
3973         }
3974
3975         if (frame_cnt)
3976                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3977
3978         if (byte_cnt)
3979                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3980 }
3981 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3982
3983 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3984         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3985         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3986         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3987         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3988 };