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                         }
1244                         break;
1245                 default:
1246                         break;
1247                 }
1248
1249                 if (elem_parse_failed)
1250                         elems->parse_error = true;
1251                 else
1252                         __set_bit(id, seen_elems);
1253         }
1254
1255         if (!for_each_element_completed(elem, start, len))
1256                 elems->parse_error = true;
1257
1258         return crc;
1259 }
1260
1261 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1262                                             struct ieee802_11_elems *elems,
1263                                             u8 *transmitter_bssid,
1264                                             u8 *bss_bssid,
1265                                             u8 *nontransmitted_profile)
1266 {
1267         const struct element *elem, *sub;
1268         size_t profile_len = 0;
1269         bool found = false;
1270
1271         if (!bss_bssid || !transmitter_bssid)
1272                 return profile_len;
1273
1274         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1275                 if (elem->datalen < 2)
1276                         continue;
1277
1278                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1279                         u8 new_bssid[ETH_ALEN];
1280                         const u8 *index;
1281
1282                         if (sub->id != 0 || sub->datalen < 4) {
1283                                 /* not a valid BSS profile */
1284                                 continue;
1285                         }
1286
1287                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1288                             sub->data[1] != 2) {
1289                                 /* The first element of the
1290                                  * Nontransmitted BSSID Profile is not
1291                                  * the Nontransmitted BSSID Capability
1292                                  * element.
1293                                  */
1294                                 continue;
1295                         }
1296
1297                         memset(nontransmitted_profile, 0, len);
1298                         profile_len = cfg80211_merge_profile(start, len,
1299                                                              elem,
1300                                                              sub,
1301                                                              nontransmitted_profile,
1302                                                              len);
1303
1304                         /* found a Nontransmitted BSSID Profile */
1305                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1306                                                  nontransmitted_profile,
1307                                                  profile_len);
1308                         if (!index || index[1] < 1 || index[2] == 0) {
1309                                 /* Invalid MBSSID Index element */
1310                                 continue;
1311                         }
1312
1313                         cfg80211_gen_new_bssid(transmitter_bssid,
1314                                                elem->data[0],
1315                                                index[2],
1316                                                new_bssid);
1317                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1318                                 found = true;
1319                                 elems->bssid_index_len = index[1];
1320                                 elems->bssid_index = (void *)&index[2];
1321                                 break;
1322                         }
1323                 }
1324         }
1325
1326         return found ? profile_len : 0;
1327 }
1328
1329 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1330                                struct ieee802_11_elems *elems,
1331                                u64 filter, u32 crc, u8 *transmitter_bssid,
1332                                u8 *bss_bssid)
1333 {
1334         const struct element *non_inherit = NULL;
1335         u8 *nontransmitted_profile;
1336         int nontransmitted_profile_len = 0;
1337
1338         memset(elems, 0, sizeof(*elems));
1339         elems->ie_start = start;
1340         elems->total_len = len;
1341
1342         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1343         if (nontransmitted_profile) {
1344                 nontransmitted_profile_len =
1345                         ieee802_11_find_bssid_profile(start, len, elems,
1346                                                       transmitter_bssid,
1347                                                       bss_bssid,
1348                                                       nontransmitted_profile);
1349                 non_inherit =
1350                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1351                                                nontransmitted_profile,
1352                                                nontransmitted_profile_len);
1353         }
1354
1355         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1356                                           crc, non_inherit);
1357
1358         /* Override with nontransmitted profile, if found */
1359         if (nontransmitted_profile_len)
1360                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1361                                             nontransmitted_profile_len,
1362                                             action, elems, 0, 0, NULL);
1363
1364         if (elems->tim && !elems->parse_error) {
1365                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1366
1367                 elems->dtim_period = tim_ie->dtim_period;
1368                 elems->dtim_count = tim_ie->dtim_count;
1369         }
1370
1371         /* Override DTIM period and count if needed */
1372         if (elems->bssid_index &&
1373             elems->bssid_index_len >=
1374             offsetofend(struct ieee80211_bssid_index, dtim_period))
1375                 elems->dtim_period = elems->bssid_index->dtim_period;
1376
1377         if (elems->bssid_index &&
1378             elems->bssid_index_len >=
1379             offsetofend(struct ieee80211_bssid_index, dtim_count))
1380                 elems->dtim_count = elems->bssid_index->dtim_count;
1381
1382         kfree(nontransmitted_profile);
1383
1384         return crc;
1385 }
1386
1387 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1388                                            struct ieee80211_tx_queue_params
1389                                            *qparam, int ac)
1390 {
1391         struct ieee80211_chanctx_conf *chanctx_conf;
1392         const struct ieee80211_reg_rule *rrule;
1393         const struct ieee80211_wmm_ac *wmm_ac;
1394         u16 center_freq = 0;
1395
1396         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1397             sdata->vif.type != NL80211_IFTYPE_STATION)
1398                 return;
1399
1400         rcu_read_lock();
1401         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1402         if (chanctx_conf)
1403                 center_freq = chanctx_conf->def.chan->center_freq;
1404
1405         if (!center_freq) {
1406                 rcu_read_unlock();
1407                 return;
1408         }
1409
1410         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1411
1412         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1413                 rcu_read_unlock();
1414                 return;
1415         }
1416
1417         if (sdata->vif.type == NL80211_IFTYPE_AP)
1418                 wmm_ac = &rrule->wmm_rule.ap[ac];
1419         else
1420                 wmm_ac = &rrule->wmm_rule.client[ac];
1421         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1422         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1423         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1424         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1425         rcu_read_unlock();
1426 }
1427
1428 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1429                                bool bss_notify, bool enable_qos)
1430 {
1431         struct ieee80211_local *local = sdata->local;
1432         struct ieee80211_tx_queue_params qparam;
1433         struct ieee80211_chanctx_conf *chanctx_conf;
1434         int ac;
1435         bool use_11b;
1436         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1437         int aCWmin, aCWmax;
1438
1439         if (!local->ops->conf_tx)
1440                 return;
1441
1442         if (local->hw.queues < IEEE80211_NUM_ACS)
1443                 return;
1444
1445         memset(&qparam, 0, sizeof(qparam));
1446
1447         rcu_read_lock();
1448         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1449         use_11b = (chanctx_conf &&
1450                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1451                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1452         rcu_read_unlock();
1453
1454         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1455
1456         /* Set defaults according to 802.11-2007 Table 7-37 */
1457         aCWmax = 1023;
1458         if (use_11b)
1459                 aCWmin = 31;
1460         else
1461                 aCWmin = 15;
1462
1463         /* Confiure old 802.11b/g medium access rules. */
1464         qparam.cw_max = aCWmax;
1465         qparam.cw_min = aCWmin;
1466         qparam.txop = 0;
1467         qparam.aifs = 2;
1468
1469         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1470                 /* Update if QoS is enabled. */
1471                 if (enable_qos) {
1472                         switch (ac) {
1473                         case IEEE80211_AC_BK:
1474                                 qparam.cw_max = aCWmax;
1475                                 qparam.cw_min = aCWmin;
1476                                 qparam.txop = 0;
1477                                 if (is_ocb)
1478                                         qparam.aifs = 9;
1479                                 else
1480                                         qparam.aifs = 7;
1481                                 break;
1482                         /* never happens but let's not leave undefined */
1483                         default:
1484                         case IEEE80211_AC_BE:
1485                                 qparam.cw_max = aCWmax;
1486                                 qparam.cw_min = aCWmin;
1487                                 qparam.txop = 0;
1488                                 if (is_ocb)
1489                                         qparam.aifs = 6;
1490                                 else
1491                                         qparam.aifs = 3;
1492                                 break;
1493                         case IEEE80211_AC_VI:
1494                                 qparam.cw_max = aCWmin;
1495                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1496                                 if (is_ocb)
1497                                         qparam.txop = 0;
1498                                 else if (use_11b)
1499                                         qparam.txop = 6016/32;
1500                                 else
1501                                         qparam.txop = 3008/32;
1502
1503                                 if (is_ocb)
1504                                         qparam.aifs = 3;
1505                                 else
1506                                         qparam.aifs = 2;
1507                                 break;
1508                         case IEEE80211_AC_VO:
1509                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1510                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1511                                 if (is_ocb)
1512                                         qparam.txop = 0;
1513                                 else if (use_11b)
1514                                         qparam.txop = 3264/32;
1515                                 else
1516                                         qparam.txop = 1504/32;
1517                                 qparam.aifs = 2;
1518                                 break;
1519                         }
1520                 }
1521                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1522
1523                 qparam.uapsd = false;
1524
1525                 sdata->tx_conf[ac] = qparam;
1526                 drv_conf_tx(local, sdata, ac, &qparam);
1527         }
1528
1529         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1530             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1531             sdata->vif.type != NL80211_IFTYPE_NAN) {
1532                 sdata->vif.bss_conf.qos = enable_qos;
1533                 if (bss_notify)
1534                         ieee80211_bss_info_change_notify(sdata,
1535                                                          BSS_CHANGED_QOS);
1536         }
1537 }
1538
1539 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1540                          u16 transaction, u16 auth_alg, u16 status,
1541                          const u8 *extra, size_t extra_len, const u8 *da,
1542                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1543                          u32 tx_flags)
1544 {
1545         struct ieee80211_local *local = sdata->local;
1546         struct sk_buff *skb;
1547         struct ieee80211_mgmt *mgmt;
1548         int err;
1549
1550         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1551         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1552                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1553         if (!skb)
1554                 return;
1555
1556         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1557
1558         mgmt = skb_put_zero(skb, 24 + 6);
1559         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1560                                           IEEE80211_STYPE_AUTH);
1561         memcpy(mgmt->da, da, ETH_ALEN);
1562         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1563         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1564         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1565         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1566         mgmt->u.auth.status_code = cpu_to_le16(status);
1567         if (extra)
1568                 skb_put_data(skb, extra, extra_len);
1569
1570         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1571                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1572                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1573                 WARN_ON(err);
1574         }
1575
1576         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1577                                         tx_flags;
1578         ieee80211_tx_skb(sdata, skb);
1579 }
1580
1581 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1582                                     const u8 *bssid, u16 stype, u16 reason,
1583                                     bool send_frame, u8 *frame_buf)
1584 {
1585         struct ieee80211_local *local = sdata->local;
1586         struct sk_buff *skb;
1587         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1588
1589         /* build frame */
1590         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1591         mgmt->duration = 0; /* initialize only */
1592         mgmt->seq_ctrl = 0; /* initialize only */
1593         memcpy(mgmt->da, bssid, ETH_ALEN);
1594         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1595         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1596         /* u.deauth.reason_code == u.disassoc.reason_code */
1597         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1598
1599         if (send_frame) {
1600                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1601                                     IEEE80211_DEAUTH_FRAME_LEN);
1602                 if (!skb)
1603                         return;
1604
1605                 skb_reserve(skb, local->hw.extra_tx_headroom);
1606
1607                 /* copy in frame */
1608                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1609
1610                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1611                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1612                         IEEE80211_SKB_CB(skb)->flags |=
1613                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1614
1615                 ieee80211_tx_skb(sdata, skb);
1616         }
1617 }
1618
1619 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1620                                          u8 *buffer, size_t buffer_len,
1621                                          const u8 *ie, size_t ie_len,
1622                                          enum nl80211_band band,
1623                                          u32 rate_mask,
1624                                          struct cfg80211_chan_def *chandef,
1625                                          size_t *offset, u32 flags)
1626 {
1627         struct ieee80211_supported_band *sband;
1628         const struct ieee80211_sta_he_cap *he_cap;
1629         u8 *pos = buffer, *end = buffer + buffer_len;
1630         size_t noffset;
1631         int supp_rates_len, i;
1632         u8 rates[32];
1633         int num_rates;
1634         int ext_rates_len;
1635         int shift;
1636         u32 rate_flags;
1637         bool have_80mhz = false;
1638
1639         *offset = 0;
1640
1641         sband = local->hw.wiphy->bands[band];
1642         if (WARN_ON_ONCE(!sband))
1643                 return 0;
1644
1645         rate_flags = ieee80211_chandef_rate_flags(chandef);
1646         shift = ieee80211_chandef_get_shift(chandef);
1647
1648         num_rates = 0;
1649         for (i = 0; i < sband->n_bitrates; i++) {
1650                 if ((BIT(i) & rate_mask) == 0)
1651                         continue; /* skip rate */
1652                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1653                         continue;
1654
1655                 rates[num_rates++] =
1656                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1657                                           (1 << shift) * 5);
1658         }
1659
1660         supp_rates_len = min_t(int, num_rates, 8);
1661
1662         if (end - pos < 2 + supp_rates_len)
1663                 goto out_err;
1664         *pos++ = WLAN_EID_SUPP_RATES;
1665         *pos++ = supp_rates_len;
1666         memcpy(pos, rates, supp_rates_len);
1667         pos += supp_rates_len;
1668
1669         /* insert "request information" if in custom IEs */
1670         if (ie && ie_len) {
1671                 static const u8 before_extrates[] = {
1672                         WLAN_EID_SSID,
1673                         WLAN_EID_SUPP_RATES,
1674                         WLAN_EID_REQUEST,
1675                 };
1676                 noffset = ieee80211_ie_split(ie, ie_len,
1677                                              before_extrates,
1678                                              ARRAY_SIZE(before_extrates),
1679                                              *offset);
1680                 if (end - pos < noffset - *offset)
1681                         goto out_err;
1682                 memcpy(pos, ie + *offset, noffset - *offset);
1683                 pos += noffset - *offset;
1684                 *offset = noffset;
1685         }
1686
1687         ext_rates_len = num_rates - supp_rates_len;
1688         if (ext_rates_len > 0) {
1689                 if (end - pos < 2 + ext_rates_len)
1690                         goto out_err;
1691                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1692                 *pos++ = ext_rates_len;
1693                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1694                 pos += ext_rates_len;
1695         }
1696
1697         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1698                 if (end - pos < 3)
1699                         goto out_err;
1700                 *pos++ = WLAN_EID_DS_PARAMS;
1701                 *pos++ = 1;
1702                 *pos++ = ieee80211_frequency_to_channel(
1703                                 chandef->chan->center_freq);
1704         }
1705
1706         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1707                 goto done;
1708
1709         /* insert custom IEs that go before HT */
1710         if (ie && ie_len) {
1711                 static const u8 before_ht[] = {
1712                         /*
1713                          * no need to list the ones split off already
1714                          * (or generated here)
1715                          */
1716                         WLAN_EID_DS_PARAMS,
1717                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1718                 };
1719                 noffset = ieee80211_ie_split(ie, ie_len,
1720                                              before_ht, ARRAY_SIZE(before_ht),
1721                                              *offset);
1722                 if (end - pos < noffset - *offset)
1723                         goto out_err;
1724                 memcpy(pos, ie + *offset, noffset - *offset);
1725                 pos += noffset - *offset;
1726                 *offset = noffset;
1727         }
1728
1729         if (sband->ht_cap.ht_supported) {
1730                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1731                         goto out_err;
1732                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1733                                                 sband->ht_cap.cap);
1734         }
1735
1736         /* insert custom IEs that go before VHT */
1737         if (ie && ie_len) {
1738                 static const u8 before_vht[] = {
1739                         /*
1740                          * no need to list the ones split off already
1741                          * (or generated here)
1742                          */
1743                         WLAN_EID_BSS_COEX_2040,
1744                         WLAN_EID_EXT_CAPABILITY,
1745                         WLAN_EID_SSID_LIST,
1746                         WLAN_EID_CHANNEL_USAGE,
1747                         WLAN_EID_INTERWORKING,
1748                         WLAN_EID_MESH_ID,
1749                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1750                 };
1751                 noffset = ieee80211_ie_split(ie, ie_len,
1752                                              before_vht, ARRAY_SIZE(before_vht),
1753                                              *offset);
1754                 if (end - pos < noffset - *offset)
1755                         goto out_err;
1756                 memcpy(pos, ie + *offset, noffset - *offset);
1757                 pos += noffset - *offset;
1758                 *offset = noffset;
1759         }
1760
1761         /* Check if any channel in this sband supports at least 80 MHz */
1762         for (i = 0; i < sband->n_channels; i++) {
1763                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1764                                                 IEEE80211_CHAN_NO_80MHZ))
1765                         continue;
1766
1767                 have_80mhz = true;
1768                 break;
1769         }
1770
1771         if (sband->vht_cap.vht_supported && have_80mhz) {
1772                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1773                         goto out_err;
1774                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1775                                                  sband->vht_cap.cap);
1776         }
1777
1778         /* insert custom IEs that go before HE */
1779         if (ie && ie_len) {
1780                 static const u8 before_he[] = {
1781                         /*
1782                          * no need to list the ones split off before VHT
1783                          * or generated here
1784                          */
1785                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1786                         WLAN_EID_AP_CSN,
1787                         /* TODO: add 11ah/11aj/11ak elements */
1788                 };
1789                 noffset = ieee80211_ie_split(ie, ie_len,
1790                                              before_he, ARRAY_SIZE(before_he),
1791                                              *offset);
1792                 if (end - pos < noffset - *offset)
1793                         goto out_err;
1794                 memcpy(pos, ie + *offset, noffset - *offset);
1795                 pos += noffset - *offset;
1796                 *offset = noffset;
1797         }
1798
1799         he_cap = ieee80211_get_he_sta_cap(sband);
1800         if (he_cap) {
1801                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1802                 if (!pos)
1803                         goto out_err;
1804         }
1805
1806         /*
1807          * If adding more here, adjust code in main.c
1808          * that calculates local->scan_ies_len.
1809          */
1810
1811         return pos - buffer;
1812  out_err:
1813         WARN_ONCE(1, "not enough space for preq IEs\n");
1814  done:
1815         return pos - buffer;
1816 }
1817
1818 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1819                              size_t buffer_len,
1820                              struct ieee80211_scan_ies *ie_desc,
1821                              const u8 *ie, size_t ie_len,
1822                              u8 bands_used, u32 *rate_masks,
1823                              struct cfg80211_chan_def *chandef,
1824                              u32 flags)
1825 {
1826         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1827         int i;
1828
1829         memset(ie_desc, 0, sizeof(*ie_desc));
1830
1831         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1832                 if (bands_used & BIT(i)) {
1833                         pos += ieee80211_build_preq_ies_band(local,
1834                                                              buffer + pos,
1835                                                              buffer_len - pos,
1836                                                              ie, ie_len, i,
1837                                                              rate_masks[i],
1838                                                              chandef,
1839                                                              &custom_ie_offset,
1840                                                              flags);
1841                         ie_desc->ies[i] = buffer + old_pos;
1842                         ie_desc->len[i] = pos - old_pos;
1843                         old_pos = pos;
1844                 }
1845         }
1846
1847         /* add any remaining custom IEs */
1848         if (ie && ie_len) {
1849                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1850                               "not enough space for preq custom IEs\n"))
1851                         return pos;
1852                 memcpy(buffer + pos, ie + custom_ie_offset,
1853                        ie_len - custom_ie_offset);
1854                 ie_desc->common_ies = buffer + pos;
1855                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1856                 pos += ie_len - custom_ie_offset;
1857         }
1858
1859         return pos;
1860 };
1861
1862 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1863                                           const u8 *src, const u8 *dst,
1864                                           u32 ratemask,
1865                                           struct ieee80211_channel *chan,
1866                                           const u8 *ssid, size_t ssid_len,
1867                                           const u8 *ie, size_t ie_len,
1868                                           u32 flags)
1869 {
1870         struct ieee80211_local *local = sdata->local;
1871         struct cfg80211_chan_def chandef;
1872         struct sk_buff *skb;
1873         struct ieee80211_mgmt *mgmt;
1874         int ies_len;
1875         u32 rate_masks[NUM_NL80211_BANDS] = {};
1876         struct ieee80211_scan_ies dummy_ie_desc;
1877
1878         /*
1879          * Do not send DS Channel parameter for directed probe requests
1880          * in order to maximize the chance that we get a response.  Some
1881          * badly-behaved APs don't respond when this parameter is included.
1882          */
1883         chandef.width = sdata->vif.bss_conf.chandef.width;
1884         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1885                 chandef.chan = NULL;
1886         else
1887                 chandef.chan = chan;
1888
1889         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1890                                      100 + ie_len);
1891         if (!skb)
1892                 return NULL;
1893
1894         rate_masks[chan->band] = ratemask;
1895         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1896                                            skb_tailroom(skb), &dummy_ie_desc,
1897                                            ie, ie_len, BIT(chan->band),
1898                                            rate_masks, &chandef, flags);
1899         skb_put(skb, ies_len);
1900
1901         if (dst) {
1902                 mgmt = (struct ieee80211_mgmt *) skb->data;
1903                 memcpy(mgmt->da, dst, ETH_ALEN);
1904                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1905         }
1906
1907         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1908
1909         return skb;
1910 }
1911
1912 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1913                             struct ieee802_11_elems *elems,
1914                             enum nl80211_band band, u32 *basic_rates)
1915 {
1916         struct ieee80211_supported_band *sband;
1917         size_t num_rates;
1918         u32 supp_rates, rate_flags;
1919         int i, j, shift;
1920
1921         sband = sdata->local->hw.wiphy->bands[band];
1922         if (WARN_ON(!sband))
1923                 return 1;
1924
1925         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1926         shift = ieee80211_vif_get_shift(&sdata->vif);
1927
1928         num_rates = sband->n_bitrates;
1929         supp_rates = 0;
1930         for (i = 0; i < elems->supp_rates_len +
1931                      elems->ext_supp_rates_len; i++) {
1932                 u8 rate = 0;
1933                 int own_rate;
1934                 bool is_basic;
1935                 if (i < elems->supp_rates_len)
1936                         rate = elems->supp_rates[i];
1937                 else if (elems->ext_supp_rates)
1938                         rate = elems->ext_supp_rates
1939                                 [i - elems->supp_rates_len];
1940                 own_rate = 5 * (rate & 0x7f);
1941                 is_basic = !!(rate & 0x80);
1942
1943                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1944                         continue;
1945
1946                 for (j = 0; j < num_rates; j++) {
1947                         int brate;
1948                         if ((rate_flags & sband->bitrates[j].flags)
1949                             != rate_flags)
1950                                 continue;
1951
1952                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1953                                              1 << shift);
1954
1955                         if (brate == own_rate) {
1956                                 supp_rates |= BIT(j);
1957                                 if (basic_rates && is_basic)
1958                                         *basic_rates |= BIT(j);
1959                         }
1960                 }
1961         }
1962         return supp_rates;
1963 }
1964
1965 void ieee80211_stop_device(struct ieee80211_local *local)
1966 {
1967         ieee80211_led_radio(local, false);
1968         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1969
1970         cancel_work_sync(&local->reconfig_filter);
1971
1972         flush_workqueue(local->workqueue);
1973         drv_stop(local);
1974 }
1975
1976 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1977                                            bool aborted)
1978 {
1979         /* It's possible that we don't handle the scan completion in
1980          * time during suspend, so if it's still marked as completed
1981          * here, queue the work and flush it to clean things up.
1982          * Instead of calling the worker function directly here, we
1983          * really queue it to avoid potential races with other flows
1984          * scheduling the same work.
1985          */
1986         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1987                 /* If coming from reconfiguration failure, abort the scan so
1988                  * we don't attempt to continue a partial HW scan - which is
1989                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1990                  * completed scan, and a 5 GHz portion is still pending.
1991                  */
1992                 if (aborted)
1993                         set_bit(SCAN_ABORTED, &local->scanning);
1994                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1995                 flush_delayed_work(&local->scan_work);
1996         }
1997 }
1998
1999 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2000 {
2001         struct ieee80211_sub_if_data *sdata;
2002         struct ieee80211_chanctx *ctx;
2003
2004         /*
2005          * We get here if during resume the device can't be restarted properly.
2006          * We might also get here if this happens during HW reset, which is a
2007          * slightly different situation and we need to drop all connections in
2008          * the latter case.
2009          *
2010          * Ask cfg80211 to turn off all interfaces, this will result in more
2011          * warnings but at least we'll then get into a clean stopped state.
2012          */
2013
2014         local->resuming = false;
2015         local->suspended = false;
2016         local->in_reconfig = false;
2017
2018         ieee80211_flush_completed_scan(local, true);
2019
2020         /* scheduled scan clearly can't be running any more, but tell
2021          * cfg80211 and clear local state
2022          */
2023         ieee80211_sched_scan_end(local);
2024
2025         list_for_each_entry(sdata, &local->interfaces, list)
2026                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2027
2028         /* Mark channel contexts as not being in the driver any more to avoid
2029          * removing them from the driver during the shutdown process...
2030          */
2031         mutex_lock(&local->chanctx_mtx);
2032         list_for_each_entry(ctx, &local->chanctx_list, list)
2033                 ctx->driver_present = false;
2034         mutex_unlock(&local->chanctx_mtx);
2035
2036         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2037 }
2038
2039 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2040                                      struct ieee80211_sub_if_data *sdata)
2041 {
2042         struct ieee80211_chanctx_conf *conf;
2043         struct ieee80211_chanctx *ctx;
2044
2045         if (!local->use_chanctx)
2046                 return;
2047
2048         mutex_lock(&local->chanctx_mtx);
2049         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2050                                          lockdep_is_held(&local->chanctx_mtx));
2051         if (conf) {
2052                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2053                 drv_assign_vif_chanctx(local, sdata, ctx);
2054         }
2055         mutex_unlock(&local->chanctx_mtx);
2056 }
2057
2058 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2059 {
2060         struct ieee80211_local *local = sdata->local;
2061         struct sta_info *sta;
2062
2063         /* add STAs back */
2064         mutex_lock(&local->sta_mtx);
2065         list_for_each_entry(sta, &local->sta_list, list) {
2066                 enum ieee80211_sta_state state;
2067
2068                 if (!sta->uploaded || sta->sdata != sdata)
2069                         continue;
2070
2071                 for (state = IEEE80211_STA_NOTEXIST;
2072                      state < sta->sta_state; state++)
2073                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2074                                               state + 1));
2075         }
2076         mutex_unlock(&local->sta_mtx);
2077 }
2078
2079 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2080 {
2081         struct cfg80211_nan_func *func, **funcs;
2082         int res, id, i = 0;
2083
2084         res = drv_start_nan(sdata->local, sdata,
2085                             &sdata->u.nan.conf);
2086         if (WARN_ON(res))
2087                 return res;
2088
2089         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2090                         sizeof(*funcs),
2091                         GFP_KERNEL);
2092         if (!funcs)
2093                 return -ENOMEM;
2094
2095         /* Add all the functions:
2096          * This is a little bit ugly. We need to call a potentially sleeping
2097          * callback for each NAN function, so we can't hold the spinlock.
2098          */
2099         spin_lock_bh(&sdata->u.nan.func_lock);
2100
2101         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2102                 funcs[i++] = func;
2103
2104         spin_unlock_bh(&sdata->u.nan.func_lock);
2105
2106         for (i = 0; funcs[i]; i++) {
2107                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2108                 if (WARN_ON(res))
2109                         ieee80211_nan_func_terminated(&sdata->vif,
2110                                                       funcs[i]->instance_id,
2111                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2112                                                       GFP_KERNEL);
2113         }
2114
2115         kfree(funcs);
2116
2117         return 0;
2118 }
2119
2120 int ieee80211_reconfig(struct ieee80211_local *local)
2121 {
2122         struct ieee80211_hw *hw = &local->hw;
2123         struct ieee80211_sub_if_data *sdata;
2124         struct ieee80211_chanctx *ctx;
2125         struct sta_info *sta;
2126         int res, i;
2127         bool reconfig_due_to_wowlan = false;
2128         struct ieee80211_sub_if_data *sched_scan_sdata;
2129         struct cfg80211_sched_scan_request *sched_scan_req;
2130         bool sched_scan_stopped = false;
2131         bool suspended = local->suspended;
2132
2133         /* nothing to do if HW shouldn't run */
2134         if (!local->open_count)
2135                 goto wake_up;
2136
2137 #ifdef CONFIG_PM
2138         if (suspended)
2139                 local->resuming = true;
2140
2141         if (local->wowlan) {
2142                 /*
2143                  * In the wowlan case, both mac80211 and the device
2144                  * are functional when the resume op is called, so
2145                  * clear local->suspended so the device could operate
2146                  * normally (e.g. pass rx frames).
2147                  */
2148                 local->suspended = false;
2149                 res = drv_resume(local);
2150                 local->wowlan = false;
2151                 if (res < 0) {
2152                         local->resuming = false;
2153                         return res;
2154                 }
2155                 if (res == 0)
2156                         goto wake_up;
2157                 WARN_ON(res > 1);
2158                 /*
2159                  * res is 1, which means the driver requested
2160                  * to go through a regular reset on wakeup.
2161                  * restore local->suspended in this case.
2162                  */
2163                 reconfig_due_to_wowlan = true;
2164                 local->suspended = true;
2165         }
2166 #endif
2167
2168         /*
2169          * In case of hw_restart during suspend (without wowlan),
2170          * cancel restart work, as we are reconfiguring the device
2171          * anyway.
2172          * Note that restart_work is scheduled on a frozen workqueue,
2173          * so we can't deadlock in this case.
2174          */
2175         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2176                 cancel_work_sync(&local->restart_work);
2177
2178         local->started = false;
2179
2180         /*
2181          * Upon resume hardware can sometimes be goofy due to
2182          * various platform / driver / bus issues, so restarting
2183          * the device may at times not work immediately. Propagate
2184          * the error.
2185          */
2186         res = drv_start(local);
2187         if (res) {
2188                 if (suspended)
2189                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2190                 else
2191                         WARN(1, "Hardware became unavailable during restart.\n");
2192                 ieee80211_handle_reconfig_failure(local);
2193                 return res;
2194         }
2195
2196         /* setup fragmentation threshold */
2197         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2198
2199         /* setup RTS threshold */
2200         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2201
2202         /* reset coverage class */
2203         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2204
2205         ieee80211_led_radio(local, true);
2206         ieee80211_mod_tpt_led_trig(local,
2207                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2208
2209         /* add interfaces */
2210         sdata = rtnl_dereference(local->monitor_sdata);
2211         if (sdata) {
2212                 /* in HW restart it exists already */
2213                 WARN_ON(local->resuming);
2214                 res = drv_add_interface(local, sdata);
2215                 if (WARN_ON(res)) {
2216                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2217                         synchronize_net();
2218                         kfree(sdata);
2219                 }
2220         }
2221
2222         list_for_each_entry(sdata, &local->interfaces, list) {
2223                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2224                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2225                     ieee80211_sdata_running(sdata)) {
2226                         res = drv_add_interface(local, sdata);
2227                         if (WARN_ON(res))
2228                                 break;
2229                 }
2230         }
2231
2232         /* If adding any of the interfaces failed above, roll back and
2233          * report failure.
2234          */
2235         if (res) {
2236                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2237                                                      list)
2238                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2239                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2240                             ieee80211_sdata_running(sdata))
2241                                 drv_remove_interface(local, sdata);
2242                 ieee80211_handle_reconfig_failure(local);
2243                 return res;
2244         }
2245
2246         /* add channel contexts */
2247         if (local->use_chanctx) {
2248                 mutex_lock(&local->chanctx_mtx);
2249                 list_for_each_entry(ctx, &local->chanctx_list, list)
2250                         if (ctx->replace_state !=
2251                             IEEE80211_CHANCTX_REPLACES_OTHER)
2252                                 WARN_ON(drv_add_chanctx(local, ctx));
2253                 mutex_unlock(&local->chanctx_mtx);
2254
2255                 sdata = rtnl_dereference(local->monitor_sdata);
2256                 if (sdata && ieee80211_sdata_running(sdata))
2257                         ieee80211_assign_chanctx(local, sdata);
2258         }
2259
2260         /* reconfigure hardware */
2261         ieee80211_hw_config(local, ~0);
2262
2263         ieee80211_configure_filter(local);
2264
2265         /* Finally also reconfigure all the BSS information */
2266         list_for_each_entry(sdata, &local->interfaces, list) {
2267                 u32 changed;
2268
2269                 if (!ieee80211_sdata_running(sdata))
2270                         continue;
2271
2272                 ieee80211_assign_chanctx(local, sdata);
2273
2274                 switch (sdata->vif.type) {
2275                 case NL80211_IFTYPE_AP_VLAN:
2276                 case NL80211_IFTYPE_MONITOR:
2277                         break;
2278                 case NL80211_IFTYPE_ADHOC:
2279                         if (sdata->vif.bss_conf.ibss_joined)
2280                                 WARN_ON(drv_join_ibss(local, sdata));
2281                         /* fall through */
2282                 default:
2283                         ieee80211_reconfig_stations(sdata);
2284                         /* fall through */
2285                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2286                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2287                                 drv_conf_tx(local, sdata, i,
2288                                             &sdata->tx_conf[i]);
2289                         break;
2290                 }
2291
2292                 /* common change flags for all interface types */
2293                 changed = BSS_CHANGED_ERP_CTS_PROT |
2294                           BSS_CHANGED_ERP_PREAMBLE |
2295                           BSS_CHANGED_ERP_SLOT |
2296                           BSS_CHANGED_HT |
2297                           BSS_CHANGED_BASIC_RATES |
2298                           BSS_CHANGED_BEACON_INT |
2299                           BSS_CHANGED_BSSID |
2300                           BSS_CHANGED_CQM |
2301                           BSS_CHANGED_QOS |
2302                           BSS_CHANGED_IDLE |
2303                           BSS_CHANGED_TXPOWER |
2304                           BSS_CHANGED_MCAST_RATE;
2305
2306                 if (sdata->vif.mu_mimo_owner)
2307                         changed |= BSS_CHANGED_MU_GROUPS;
2308
2309                 switch (sdata->vif.type) {
2310                 case NL80211_IFTYPE_STATION:
2311                         changed |= BSS_CHANGED_ASSOC |
2312                                    BSS_CHANGED_ARP_FILTER |
2313                                    BSS_CHANGED_PS;
2314
2315                         /* Re-send beacon info report to the driver */
2316                         if (sdata->u.mgd.have_beacon)
2317                                 changed |= BSS_CHANGED_BEACON_INFO;
2318
2319                         if (sdata->vif.bss_conf.max_idle_period ||
2320                             sdata->vif.bss_conf.protected_keep_alive)
2321                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2322
2323                         sdata_lock(sdata);
2324                         ieee80211_bss_info_change_notify(sdata, changed);
2325                         sdata_unlock(sdata);
2326                         break;
2327                 case NL80211_IFTYPE_OCB:
2328                         changed |= BSS_CHANGED_OCB;
2329                         ieee80211_bss_info_change_notify(sdata, changed);
2330                         break;
2331                 case NL80211_IFTYPE_ADHOC:
2332                         changed |= BSS_CHANGED_IBSS;
2333                         /* fall through */
2334                 case NL80211_IFTYPE_AP:
2335                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2336
2337                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2338                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2339                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2340                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2341
2342                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2343                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2344
2345                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2346                                         drv_start_ap(local, sdata);
2347                         }
2348
2349                         /* fall through */
2350                 case NL80211_IFTYPE_MESH_POINT:
2351                         if (sdata->vif.bss_conf.enable_beacon) {
2352                                 changed |= BSS_CHANGED_BEACON |
2353                                            BSS_CHANGED_BEACON_ENABLED;
2354                                 ieee80211_bss_info_change_notify(sdata, changed);
2355                         }
2356                         break;
2357                 case NL80211_IFTYPE_NAN:
2358                         res = ieee80211_reconfig_nan(sdata);
2359                         if (res < 0) {
2360                                 ieee80211_handle_reconfig_failure(local);
2361                                 return res;
2362                         }
2363                         break;
2364                 case NL80211_IFTYPE_WDS:
2365                 case NL80211_IFTYPE_AP_VLAN:
2366                 case NL80211_IFTYPE_MONITOR:
2367                 case NL80211_IFTYPE_P2P_DEVICE:
2368                         /* nothing to do */
2369                         break;
2370                 case NL80211_IFTYPE_UNSPECIFIED:
2371                 case NUM_NL80211_IFTYPES:
2372                 case NL80211_IFTYPE_P2P_CLIENT:
2373                 case NL80211_IFTYPE_P2P_GO:
2374                         WARN_ON(1);
2375                         break;
2376                 }
2377         }
2378
2379         ieee80211_recalc_ps(local);
2380
2381         /*
2382          * The sta might be in psm against the ap (e.g. because
2383          * this was the state before a hw restart), so we
2384          * explicitly send a null packet in order to make sure
2385          * it'll sync against the ap (and get out of psm).
2386          */
2387         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2388                 list_for_each_entry(sdata, &local->interfaces, list) {
2389                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2390                                 continue;
2391                         if (!sdata->u.mgd.associated)
2392                                 continue;
2393
2394                         ieee80211_send_nullfunc(local, sdata, false);
2395                 }
2396         }
2397
2398         /* APs are now beaconing, add back stations */
2399         mutex_lock(&local->sta_mtx);
2400         list_for_each_entry(sta, &local->sta_list, list) {
2401                 enum ieee80211_sta_state state;
2402
2403                 if (!sta->uploaded)
2404                         continue;
2405
2406                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2407                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2408                         continue;
2409
2410                 for (state = IEEE80211_STA_NOTEXIST;
2411                      state < sta->sta_state; state++)
2412                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2413                                               state + 1));
2414         }
2415         mutex_unlock(&local->sta_mtx);
2416
2417         /* add back keys */
2418         list_for_each_entry(sdata, &local->interfaces, list)
2419                 ieee80211_reset_crypto_tx_tailroom(sdata);
2420
2421         list_for_each_entry(sdata, &local->interfaces, list)
2422                 if (ieee80211_sdata_running(sdata))
2423                         ieee80211_enable_keys(sdata);
2424
2425         /* Reconfigure sched scan if it was interrupted by FW restart */
2426         mutex_lock(&local->mtx);
2427         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2428                                                 lockdep_is_held(&local->mtx));
2429         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2430                                                 lockdep_is_held(&local->mtx));
2431         if (sched_scan_sdata && sched_scan_req)
2432                 /*
2433                  * Sched scan stopped, but we don't want to report it. Instead,
2434                  * we're trying to reschedule. However, if more than one scan
2435                  * plan was set, we cannot reschedule since we don't know which
2436                  * scan plan was currently running (and some scan plans may have
2437                  * already finished).
2438                  */
2439                 if (sched_scan_req->n_scan_plans > 1 ||
2440                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2441                                                          sched_scan_req)) {
2442                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2443                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2444                         sched_scan_stopped = true;
2445                 }
2446         mutex_unlock(&local->mtx);
2447
2448         if (sched_scan_stopped)
2449                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2450
2451  wake_up:
2452
2453         if (local->monitors == local->open_count && local->monitors > 0)
2454                 ieee80211_add_virtual_monitor(local);
2455
2456         /*
2457          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2458          * sessions can be established after a resume.
2459          *
2460          * Also tear down aggregation sessions since reconfiguring
2461          * them in a hardware restart scenario is not easily done
2462          * right now, and the hardware will have lost information
2463          * about the sessions, but we and the AP still think they
2464          * are active. This is really a workaround though.
2465          */
2466         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2467                 mutex_lock(&local->sta_mtx);
2468
2469                 list_for_each_entry(sta, &local->sta_list, list) {
2470                         if (!local->resuming)
2471                                 ieee80211_sta_tear_down_BA_sessions(
2472                                                 sta, AGG_STOP_LOCAL_REQUEST);
2473                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2474                 }
2475
2476                 mutex_unlock(&local->sta_mtx);
2477         }
2478
2479         if (local->in_reconfig) {
2480                 local->in_reconfig = false;
2481                 barrier();
2482
2483                 /* Restart deferred ROCs */
2484                 mutex_lock(&local->mtx);
2485                 ieee80211_start_next_roc(local);
2486                 mutex_unlock(&local->mtx);
2487
2488                 /* Requeue all works */
2489                 list_for_each_entry(sdata, &local->interfaces, list)
2490                         ieee80211_queue_work(&local->hw, &sdata->work);
2491         }
2492
2493         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2494                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2495                                         false);
2496
2497         /*
2498          * If this is for hw restart things are still running.
2499          * We may want to change that later, however.
2500          */
2501         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2502                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2503
2504         if (!suspended)
2505                 return 0;
2506
2507 #ifdef CONFIG_PM
2508         /* first set suspended false, then resuming */
2509         local->suspended = false;
2510         mb();
2511         local->resuming = false;
2512
2513         ieee80211_flush_completed_scan(local, false);
2514
2515         if (local->open_count && !reconfig_due_to_wowlan)
2516                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2517
2518         list_for_each_entry(sdata, &local->interfaces, list) {
2519                 if (!ieee80211_sdata_running(sdata))
2520                         continue;
2521                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2522                         ieee80211_sta_restart(sdata);
2523         }
2524
2525         mod_timer(&local->sta_cleanup, jiffies + 1);
2526 #else
2527         WARN_ON(1);
2528 #endif
2529
2530         return 0;
2531 }
2532
2533 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2534 {
2535         struct ieee80211_sub_if_data *sdata;
2536         struct ieee80211_local *local;
2537         struct ieee80211_key *key;
2538
2539         if (WARN_ON(!vif))
2540                 return;
2541
2542         sdata = vif_to_sdata(vif);
2543         local = sdata->local;
2544
2545         if (WARN_ON(!local->resuming))
2546                 return;
2547
2548         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2549                 return;
2550
2551         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2552
2553         mutex_lock(&local->key_mtx);
2554         list_for_each_entry(key, &sdata->key_list, list)
2555                 key->flags |= KEY_FLAG_TAINTED;
2556         mutex_unlock(&local->key_mtx);
2557 }
2558 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2559
2560 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2561 {
2562         struct ieee80211_local *local = sdata->local;
2563         struct ieee80211_chanctx_conf *chanctx_conf;
2564         struct ieee80211_chanctx *chanctx;
2565
2566         mutex_lock(&local->chanctx_mtx);
2567
2568         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2569                                         lockdep_is_held(&local->chanctx_mtx));
2570
2571         /*
2572          * This function can be called from a work, thus it may be possible
2573          * that the chanctx_conf is removed (due to a disconnection, for
2574          * example).
2575          * So nothing should be done in such case.
2576          */
2577         if (!chanctx_conf)
2578                 goto unlock;
2579
2580         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2581         ieee80211_recalc_smps_chanctx(local, chanctx);
2582  unlock:
2583         mutex_unlock(&local->chanctx_mtx);
2584 }
2585
2586 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2587 {
2588         struct ieee80211_local *local = sdata->local;
2589         struct ieee80211_chanctx_conf *chanctx_conf;
2590         struct ieee80211_chanctx *chanctx;
2591
2592         mutex_lock(&local->chanctx_mtx);
2593
2594         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2595                                         lockdep_is_held(&local->chanctx_mtx));
2596
2597         if (WARN_ON_ONCE(!chanctx_conf))
2598                 goto unlock;
2599
2600         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2601         ieee80211_recalc_chanctx_min_def(local, chanctx);
2602  unlock:
2603         mutex_unlock(&local->chanctx_mtx);
2604 }
2605
2606 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2607 {
2608         size_t pos = offset;
2609
2610         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2611                 pos += 2 + ies[pos + 1];
2612
2613         return pos;
2614 }
2615
2616 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2617                                             int rssi_min_thold,
2618                                             int rssi_max_thold)
2619 {
2620         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2621
2622         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2623                 return;
2624
2625         /*
2626          * Scale up threshold values before storing it, as the RSSI averaging
2627          * algorithm uses a scaled up value as well. Change this scaling
2628          * factor if the RSSI averaging algorithm changes.
2629          */
2630         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2631         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2632 }
2633
2634 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2635                                     int rssi_min_thold,
2636                                     int rssi_max_thold)
2637 {
2638         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2639
2640         WARN_ON(rssi_min_thold == rssi_max_thold ||
2641                 rssi_min_thold > rssi_max_thold);
2642
2643         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2644                                        rssi_max_thold);
2645 }
2646 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2647
2648 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2649 {
2650         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2651
2652         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2653 }
2654 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2655
2656 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2657                               u16 cap)
2658 {
2659         __le16 tmp;
2660
2661         *pos++ = WLAN_EID_HT_CAPABILITY;
2662         *pos++ = sizeof(struct ieee80211_ht_cap);
2663         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2664
2665         /* capability flags */
2666         tmp = cpu_to_le16(cap);
2667         memcpy(pos, &tmp, sizeof(u16));
2668         pos += sizeof(u16);
2669
2670         /* AMPDU parameters */
2671         *pos++ = ht_cap->ampdu_factor |
2672                  (ht_cap->ampdu_density <<
2673                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2674
2675         /* MCS set */
2676         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2677         pos += sizeof(ht_cap->mcs);
2678
2679         /* extended capabilities */
2680         pos += sizeof(__le16);
2681
2682         /* BF capabilities */
2683         pos += sizeof(__le32);
2684
2685         /* antenna selection */
2686         pos += sizeof(u8);
2687
2688         return pos;
2689 }
2690
2691 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2692                                u32 cap)
2693 {
2694         __le32 tmp;
2695
2696         *pos++ = WLAN_EID_VHT_CAPABILITY;
2697         *pos++ = sizeof(struct ieee80211_vht_cap);
2698         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2699
2700         /* capability flags */
2701         tmp = cpu_to_le32(cap);
2702         memcpy(pos, &tmp, sizeof(u32));
2703         pos += sizeof(u32);
2704
2705         /* VHT MCS set */
2706         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2707         pos += sizeof(vht_cap->vht_mcs);
2708
2709         return pos;
2710 }
2711
2712 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2713                               const struct ieee80211_sta_he_cap *he_cap,
2714                               u8 *end)
2715 {
2716         u8 n;
2717         u8 ie_len;
2718         u8 *orig_pos = pos;
2719
2720         /* Make sure we have place for the IE */
2721         /*
2722          * TODO: the 1 added is because this temporarily is under the EXTENSION
2723          * IE. Get rid of it when it moves.
2724          */
2725         if (!he_cap)
2726                 return orig_pos;
2727
2728         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2729         ie_len = 2 + 1 +
2730                  sizeof(he_cap->he_cap_elem) + n +
2731                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2732                                        he_cap->he_cap_elem.phy_cap_info);
2733
2734         if ((end - pos) < ie_len)
2735                 return orig_pos;
2736
2737         *pos++ = WLAN_EID_EXTENSION;
2738         pos++; /* We'll set the size later below */
2739         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2740
2741         /* Fixed data */
2742         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2743         pos += sizeof(he_cap->he_cap_elem);
2744
2745         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2746         pos += n;
2747
2748         /* Check if PPE Threshold should be present */
2749         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2750              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2751                 goto end;
2752
2753         /*
2754          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2755          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2756          */
2757         n = hweight8(he_cap->ppe_thres[0] &
2758                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2759         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2760                    IEEE80211_PPE_THRES_NSS_POS));
2761
2762         /*
2763          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2764          * total size.
2765          */
2766         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2767         n = DIV_ROUND_UP(n, 8);
2768
2769         /* Copy PPE Thresholds */
2770         memcpy(pos, &he_cap->ppe_thres, n);
2771         pos += n;
2772
2773 end:
2774         orig_pos[1] = (pos - orig_pos) - 2;
2775         return pos;
2776 }
2777
2778 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2779                                const struct cfg80211_chan_def *chandef,
2780                                u16 prot_mode, bool rifs_mode)
2781 {
2782         struct ieee80211_ht_operation *ht_oper;
2783         /* Build HT Information */
2784         *pos++ = WLAN_EID_HT_OPERATION;
2785         *pos++ = sizeof(struct ieee80211_ht_operation);
2786         ht_oper = (struct ieee80211_ht_operation *)pos;
2787         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2788                                         chandef->chan->center_freq);
2789         switch (chandef->width) {
2790         case NL80211_CHAN_WIDTH_160:
2791         case NL80211_CHAN_WIDTH_80P80:
2792         case NL80211_CHAN_WIDTH_80:
2793         case NL80211_CHAN_WIDTH_40:
2794                 if (chandef->center_freq1 > chandef->chan->center_freq)
2795                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2796                 else
2797                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2798                 break;
2799         default:
2800                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2801                 break;
2802         }
2803         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2804             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2805             chandef->width != NL80211_CHAN_WIDTH_20)
2806                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2807
2808         if (rifs_mode)
2809                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2810
2811         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2812         ht_oper->stbc_param = 0x0000;
2813
2814         /* It seems that Basic MCS set and Supported MCS set
2815            are identical for the first 10 bytes */
2816         memset(&ht_oper->basic_set, 0, 16);
2817         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2818
2819         return pos + sizeof(struct ieee80211_ht_operation);
2820 }
2821
2822 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2823                                    const struct cfg80211_chan_def *chandef)
2824 {
2825         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2826         *pos++ = 3;                                     /* IE length */
2827         /* New channel width */
2828         switch (chandef->width) {
2829         case NL80211_CHAN_WIDTH_80:
2830                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2831                 break;
2832         case NL80211_CHAN_WIDTH_160:
2833                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2834                 break;
2835         case NL80211_CHAN_WIDTH_80P80:
2836                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2837                 break;
2838         default:
2839                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2840         }
2841
2842         /* new center frequency segment 0 */
2843         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2844         /* new center frequency segment 1 */
2845         if (chandef->center_freq2)
2846                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2847         else
2848                 *pos++ = 0;
2849 }
2850
2851 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2852                                 const struct cfg80211_chan_def *chandef)
2853 {
2854         struct ieee80211_vht_operation *vht_oper;
2855
2856         *pos++ = WLAN_EID_VHT_OPERATION;
2857         *pos++ = sizeof(struct ieee80211_vht_operation);
2858         vht_oper = (struct ieee80211_vht_operation *)pos;
2859         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2860                                                         chandef->center_freq1);
2861         if (chandef->center_freq2)
2862                 vht_oper->center_freq_seg1_idx =
2863                         ieee80211_frequency_to_channel(chandef->center_freq2);
2864         else
2865                 vht_oper->center_freq_seg1_idx = 0x00;
2866
2867         switch (chandef->width) {
2868         case NL80211_CHAN_WIDTH_160:
2869                 /*
2870                  * Convert 160 MHz channel width to new style as interop
2871                  * workaround.
2872                  */
2873                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2874                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2875                 if (chandef->chan->center_freq < chandef->center_freq1)
2876                         vht_oper->center_freq_seg0_idx -= 8;
2877                 else
2878                         vht_oper->center_freq_seg0_idx += 8;
2879                 break;
2880         case NL80211_CHAN_WIDTH_80P80:
2881                 /*
2882                  * Convert 80+80 MHz channel width to new style as interop
2883                  * workaround.
2884                  */
2885                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2886                 break;
2887         case NL80211_CHAN_WIDTH_80:
2888                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2889                 break;
2890         default:
2891                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2892                 break;
2893         }
2894
2895         /* don't require special VHT peer rates */
2896         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2897
2898         return pos + sizeof(struct ieee80211_vht_operation);
2899 }
2900
2901 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2902                                struct cfg80211_chan_def *chandef)
2903 {
2904         enum nl80211_channel_type channel_type;
2905
2906         if (!ht_oper)
2907                 return false;
2908
2909         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2910         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2911                 channel_type = NL80211_CHAN_HT20;
2912                 break;
2913         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2914                 channel_type = NL80211_CHAN_HT40PLUS;
2915                 break;
2916         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2917                 channel_type = NL80211_CHAN_HT40MINUS;
2918                 break;
2919         default:
2920                 channel_type = NL80211_CHAN_NO_HT;
2921                 return false;
2922         }
2923
2924         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2925         return true;
2926 }
2927
2928 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2929                                 const struct ieee80211_vht_operation *oper,
2930                                 const struct ieee80211_ht_operation *htop,
2931                                 struct cfg80211_chan_def *chandef)
2932 {
2933         struct cfg80211_chan_def new = *chandef;
2934         int cf0, cf1;
2935         int ccfs0, ccfs1, ccfs2;
2936         int ccf0, ccf1;
2937
2938         if (!oper || !htop)
2939                 return false;
2940
2941         ccfs0 = oper->center_freq_seg0_idx;
2942         ccfs1 = oper->center_freq_seg1_idx;
2943         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2944                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2945                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2946
2947         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2948         ccf0 = ccfs0;
2949         ccf1 = ccfs1;
2950         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2951                 ccf1 = ccfs2;
2952
2953         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2954         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2955
2956         switch (oper->chan_width) {
2957         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2958                 /* just use HT information directly */
2959                 break;
2960         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2961                 new.width = NL80211_CHAN_WIDTH_80;
2962                 new.center_freq1 = cf0;
2963                 /* If needed, adjust based on the newer interop workaround. */
2964                 if (ccf1) {
2965                         unsigned int diff;
2966
2967                         diff = abs(ccf1 - ccf0);
2968                         if (diff == 8) {
2969                                 new.width = NL80211_CHAN_WIDTH_160;
2970                                 new.center_freq1 = cf1;
2971                         } else if (diff > 8) {
2972                                 new.width = NL80211_CHAN_WIDTH_80P80;
2973                                 new.center_freq2 = cf1;
2974                         }
2975                 }
2976                 break;
2977         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2978                 /* deprecated encoding */
2979                 new.width = NL80211_CHAN_WIDTH_160;
2980                 new.center_freq1 = cf0;
2981                 break;
2982         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2983                 /* deprecated encoding */
2984                 new.width = NL80211_CHAN_WIDTH_80P80;
2985                 new.center_freq1 = cf0;
2986                 new.center_freq2 = cf1;
2987                 break;
2988         default:
2989                 return false;
2990         }
2991
2992         if (!cfg80211_chandef_valid(&new))
2993                 return false;
2994
2995         *chandef = new;
2996         return true;
2997 }
2998
2999 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3000                              const struct ieee80211_supported_band *sband,
3001                              const u8 *srates, int srates_len, u32 *rates)
3002 {
3003         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3004         int shift = ieee80211_chandef_get_shift(chandef);
3005         struct ieee80211_rate *br;
3006         int brate, rate, i, j, count = 0;
3007
3008         *rates = 0;
3009
3010         for (i = 0; i < srates_len; i++) {
3011                 rate = srates[i] & 0x7f;
3012
3013                 for (j = 0; j < sband->n_bitrates; j++) {
3014                         br = &sband->bitrates[j];
3015                         if ((rate_flags & br->flags) != rate_flags)
3016                                 continue;
3017
3018                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3019                         if (brate == rate) {
3020                                 *rates |= BIT(j);
3021                                 count++;
3022                                 break;
3023                         }
3024                 }
3025         }
3026         return count;
3027 }
3028
3029 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3030                             struct sk_buff *skb, bool need_basic,
3031                             enum nl80211_band band)
3032 {
3033         struct ieee80211_local *local = sdata->local;
3034         struct ieee80211_supported_band *sband;
3035         int rate, shift;
3036         u8 i, rates, *pos;
3037         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3038         u32 rate_flags;
3039
3040         shift = ieee80211_vif_get_shift(&sdata->vif);
3041         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3042         sband = local->hw.wiphy->bands[band];
3043         rates = 0;
3044         for (i = 0; i < sband->n_bitrates; i++) {
3045                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3046                         continue;
3047                 rates++;
3048         }
3049         if (rates > 8)
3050                 rates = 8;
3051
3052         if (skb_tailroom(skb) < rates + 2)
3053                 return -ENOMEM;
3054
3055         pos = skb_put(skb, rates + 2);
3056         *pos++ = WLAN_EID_SUPP_RATES;
3057         *pos++ = rates;
3058         for (i = 0; i < rates; i++) {
3059                 u8 basic = 0;
3060                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3061                         continue;
3062
3063                 if (need_basic && basic_rates & BIT(i))
3064                         basic = 0x80;
3065                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3066                                     5 * (1 << shift));
3067                 *pos++ = basic | (u8) rate;
3068         }
3069
3070         return 0;
3071 }
3072
3073 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3074                                 struct sk_buff *skb, bool need_basic,
3075                                 enum nl80211_band band)
3076 {
3077         struct ieee80211_local *local = sdata->local;
3078         struct ieee80211_supported_band *sband;
3079         int rate, shift;
3080         u8 i, exrates, *pos;
3081         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3082         u32 rate_flags;
3083
3084         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3085         shift = ieee80211_vif_get_shift(&sdata->vif);
3086
3087         sband = local->hw.wiphy->bands[band];
3088         exrates = 0;
3089         for (i = 0; i < sband->n_bitrates; i++) {
3090                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3091                         continue;
3092                 exrates++;
3093         }
3094
3095         if (exrates > 8)
3096                 exrates -= 8;
3097         else
3098                 exrates = 0;
3099
3100         if (skb_tailroom(skb) < exrates + 2)
3101                 return -ENOMEM;
3102
3103         if (exrates) {
3104                 pos = skb_put(skb, exrates + 2);
3105                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3106                 *pos++ = exrates;
3107                 for (i = 8; i < sband->n_bitrates; i++) {
3108                         u8 basic = 0;
3109                         if ((rate_flags & sband->bitrates[i].flags)
3110                             != rate_flags)
3111                                 continue;
3112                         if (need_basic && basic_rates & BIT(i))
3113                                 basic = 0x80;
3114                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3115                                             5 * (1 << shift));
3116                         *pos++ = basic | (u8) rate;
3117                 }
3118         }
3119         return 0;
3120 }
3121
3122 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3123 {
3124         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3125         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3126
3127         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3128                 /* non-managed type inferfaces */
3129                 return 0;
3130         }
3131         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3132 }
3133 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3134
3135 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3136 {
3137         if (!mcs)
3138                 return 1;
3139
3140         /* TODO: consider rx_highest */
3141
3142         if (mcs->rx_mask[3])
3143                 return 4;
3144         if (mcs->rx_mask[2])
3145                 return 3;
3146         if (mcs->rx_mask[1])
3147                 return 2;
3148         return 1;
3149 }
3150
3151 /**
3152  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3153  * @local: mac80211 hw info struct
3154  * @status: RX status
3155  * @mpdu_len: total MPDU length (including FCS)
3156  * @mpdu_offset: offset into MPDU to calculate timestamp at
3157  *
3158  * This function calculates the RX timestamp at the given MPDU offset, taking
3159  * into account what the RX timestamp was. An offset of 0 will just normalize
3160  * the timestamp to TSF at beginning of MPDU reception.
3161  */
3162 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3163                                      struct ieee80211_rx_status *status,
3164                                      unsigned int mpdu_len,
3165                                      unsigned int mpdu_offset)
3166 {
3167         u64 ts = status->mactime;
3168         struct rate_info ri;
3169         u16 rate;
3170
3171         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3172                 return 0;
3173
3174         memset(&ri, 0, sizeof(ri));
3175
3176         ri.bw = status->bw;
3177
3178         /* Fill cfg80211 rate info */
3179         switch (status->encoding) {
3180         case RX_ENC_HT:
3181                 ri.mcs = status->rate_idx;
3182                 ri.flags |= RATE_INFO_FLAGS_MCS;
3183                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3184                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3185                 break;
3186         case RX_ENC_VHT:
3187                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3188                 ri.mcs = status->rate_idx;
3189                 ri.nss = status->nss;
3190                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3191                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3192                 break;
3193         default:
3194                 WARN_ON(1);
3195                 /* fall through */
3196         case RX_ENC_LEGACY: {
3197                 struct ieee80211_supported_band *sband;
3198                 int shift = 0;
3199                 int bitrate;
3200
3201                 switch (status->bw) {
3202                 case RATE_INFO_BW_10:
3203                         shift = 1;
3204                         break;
3205                 case RATE_INFO_BW_5:
3206                         shift = 2;
3207                         break;
3208                 }
3209
3210                 sband = local->hw.wiphy->bands[status->band];
3211                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3212                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3213
3214                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3215                         /* TODO: handle HT/VHT preambles */
3216                         if (status->band == NL80211_BAND_5GHZ) {
3217                                 ts += 20 << shift;
3218                                 mpdu_offset += 2;
3219                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3220                                 ts += 96;
3221                         } else {
3222                                 ts += 192;
3223                         }
3224                 }
3225                 break;
3226                 }
3227         }
3228
3229         rate = cfg80211_calculate_bitrate(&ri);
3230         if (WARN_ONCE(!rate,
3231                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3232                       (unsigned long long)status->flag, status->rate_idx,
3233                       status->nss))
3234                 return 0;
3235
3236         /* rewind from end of MPDU */
3237         if (status->flag & RX_FLAG_MACTIME_END)
3238                 ts -= mpdu_len * 8 * 10 / rate;
3239
3240         ts += mpdu_offset * 8 * 10 / rate;
3241
3242         return ts;
3243 }
3244
3245 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3246 {
3247         struct ieee80211_sub_if_data *sdata;
3248         struct cfg80211_chan_def chandef;
3249
3250         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3251         ASSERT_RTNL();
3252
3253         mutex_lock(&local->mtx);
3254         list_for_each_entry(sdata, &local->interfaces, list) {
3255                 /* it might be waiting for the local->mtx, but then
3256                  * by the time it gets it, sdata->wdev.cac_started
3257                  * will no longer be true
3258                  */
3259                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3260
3261                 if (sdata->wdev.cac_started) {
3262                         chandef = sdata->vif.bss_conf.chandef;
3263                         ieee80211_vif_release_channel(sdata);
3264                         cfg80211_cac_event(sdata->dev,
3265                                            &chandef,
3266                                            NL80211_RADAR_CAC_ABORTED,
3267                                            GFP_KERNEL);
3268                 }
3269         }
3270         mutex_unlock(&local->mtx);
3271 }
3272
3273 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3274 {
3275         struct ieee80211_local *local =
3276                 container_of(work, struct ieee80211_local, radar_detected_work);
3277         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3278         struct ieee80211_chanctx *ctx;
3279         int num_chanctx = 0;
3280
3281         mutex_lock(&local->chanctx_mtx);
3282         list_for_each_entry(ctx, &local->chanctx_list, list) {
3283                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3284                         continue;
3285
3286                 num_chanctx++;
3287                 chandef = ctx->conf.def;
3288         }
3289         mutex_unlock(&local->chanctx_mtx);
3290
3291         rtnl_lock();
3292         ieee80211_dfs_cac_cancel(local);
3293         rtnl_unlock();
3294
3295         if (num_chanctx > 1)
3296                 /* XXX: multi-channel is not supported yet */
3297                 WARN_ON(1);
3298         else
3299                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3300 }
3301
3302 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3303 {
3304         struct ieee80211_local *local = hw_to_local(hw);
3305
3306         trace_api_radar_detected(local);
3307
3308         schedule_work(&local->radar_detected_work);
3309 }
3310 EXPORT_SYMBOL(ieee80211_radar_detected);
3311
3312 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3313 {
3314         u32 ret;
3315         int tmp;
3316
3317         switch (c->width) {
3318         case NL80211_CHAN_WIDTH_20:
3319                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3320                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3321                 break;
3322         case NL80211_CHAN_WIDTH_40:
3323                 c->width = NL80211_CHAN_WIDTH_20;
3324                 c->center_freq1 = c->chan->center_freq;
3325                 ret = IEEE80211_STA_DISABLE_40MHZ |
3326                       IEEE80211_STA_DISABLE_VHT;
3327                 break;
3328         case NL80211_CHAN_WIDTH_80:
3329                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3330                 /* n_P40 */
3331                 tmp /= 2;
3332                 /* freq_P40 */
3333                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3334                 c->width = NL80211_CHAN_WIDTH_40;
3335                 ret = IEEE80211_STA_DISABLE_VHT;
3336                 break;
3337         case NL80211_CHAN_WIDTH_80P80:
3338                 c->center_freq2 = 0;
3339                 c->width = NL80211_CHAN_WIDTH_80;
3340                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3341                       IEEE80211_STA_DISABLE_160MHZ;
3342                 break;
3343         case NL80211_CHAN_WIDTH_160:
3344                 /* n_P20 */
3345                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3346                 /* n_P80 */
3347                 tmp /= 4;
3348                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3349                 c->width = NL80211_CHAN_WIDTH_80;
3350                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3351                       IEEE80211_STA_DISABLE_160MHZ;
3352                 break;
3353         default:
3354         case NL80211_CHAN_WIDTH_20_NOHT:
3355                 WARN_ON_ONCE(1);
3356                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3357                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3358                 break;
3359         case NL80211_CHAN_WIDTH_5:
3360         case NL80211_CHAN_WIDTH_10:
3361                 WARN_ON_ONCE(1);
3362                 /* keep c->width */
3363                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3364                 break;
3365         }
3366
3367         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3368
3369         return ret;
3370 }
3371
3372 /*
3373  * Returns true if smps_mode_new is strictly more restrictive than
3374  * smps_mode_old.
3375  */
3376 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3377                                    enum ieee80211_smps_mode smps_mode_new)
3378 {
3379         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3380                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3381                 return false;
3382
3383         switch (smps_mode_old) {
3384         case IEEE80211_SMPS_STATIC:
3385                 return false;
3386         case IEEE80211_SMPS_DYNAMIC:
3387                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3388         case IEEE80211_SMPS_OFF:
3389                 return smps_mode_new != IEEE80211_SMPS_OFF;
3390         default:
3391                 WARN_ON(1);
3392         }
3393
3394         return false;
3395 }
3396
3397 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3398                               struct cfg80211_csa_settings *csa_settings)
3399 {
3400         struct sk_buff *skb;
3401         struct ieee80211_mgmt *mgmt;
3402         struct ieee80211_local *local = sdata->local;
3403         int freq;
3404         int hdr_len = offsetofend(struct ieee80211_mgmt,
3405                                   u.action.u.chan_switch);
3406         u8 *pos;
3407
3408         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3409             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3410                 return -EOPNOTSUPP;
3411
3412         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3413                             5 + /* channel switch announcement element */
3414                             3 + /* secondary channel offset element */
3415                             5 + /* wide bandwidth channel switch announcement */
3416                             8); /* mesh channel switch parameters element */
3417         if (!skb)
3418                 return -ENOMEM;
3419
3420         skb_reserve(skb, local->tx_headroom);
3421         mgmt = skb_put_zero(skb, hdr_len);
3422         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3423                                           IEEE80211_STYPE_ACTION);
3424
3425         eth_broadcast_addr(mgmt->da);
3426         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3427         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3428                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3429         } else {
3430                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3431                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3432         }
3433         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3434         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3435         pos = skb_put(skb, 5);
3436         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3437         *pos++ = 3;                                             /* IE length */
3438         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3439         freq = csa_settings->chandef.chan->center_freq;
3440         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3441         *pos++ = csa_settings->count;                           /* count */
3442
3443         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3444                 enum nl80211_channel_type ch_type;
3445
3446                 skb_put(skb, 3);
3447                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3448                 *pos++ = 1;                                     /* IE length */
3449                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3450                 if (ch_type == NL80211_CHAN_HT40PLUS)
3451                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3452                 else
3453                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3454         }
3455
3456         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3457                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3458
3459                 skb_put(skb, 8);
3460                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3461                 *pos++ = 6;                                     /* IE length */
3462                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3463                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3464                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3465                 *pos++ |= csa_settings->block_tx ?
3466                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3467                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3468                 pos += 2;
3469                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3470                 pos += 2;
3471         }
3472
3473         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3474             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3475             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3476                 skb_put(skb, 5);
3477                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3478         }
3479
3480         ieee80211_tx_skb(sdata, skb);
3481         return 0;
3482 }
3483
3484 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3485 {
3486         return !(cs == NULL || cs->cipher == 0 ||
3487                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3488                  cs->hdr_len <= cs->key_idx_off ||
3489                  cs->key_idx_shift > 7 ||
3490                  cs->key_idx_mask == 0);
3491 }
3492
3493 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3494 {
3495         int i;
3496
3497         /* Ensure we have enough iftype bitmap space for all iftype values */
3498         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3499
3500         for (i = 0; i < n; i++)
3501                 if (!ieee80211_cs_valid(&cs[i]))
3502                         return false;
3503
3504         return true;
3505 }
3506
3507 const struct ieee80211_cipher_scheme *
3508 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3509                  enum nl80211_iftype iftype)
3510 {
3511         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3512         int n = local->hw.n_cipher_schemes;
3513         int i;
3514         const struct ieee80211_cipher_scheme *cs = NULL;
3515
3516         for (i = 0; i < n; i++) {
3517                 if (l[i].cipher == cipher) {
3518                         cs = &l[i];
3519                         break;
3520                 }
3521         }
3522
3523         if (!cs || !(cs->iftype & BIT(iftype)))
3524                 return NULL;
3525
3526         return cs;
3527 }
3528
3529 int ieee80211_cs_headroom(struct ieee80211_local *local,
3530                           struct cfg80211_crypto_settings *crypto,
3531                           enum nl80211_iftype iftype)
3532 {
3533         const struct ieee80211_cipher_scheme *cs;
3534         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3535         int i;
3536
3537         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3538                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3539                                       iftype);
3540
3541                 if (cs && headroom < cs->hdr_len)
3542                         headroom = cs->hdr_len;
3543         }
3544
3545         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3546         if (cs && headroom < cs->hdr_len)
3547                 headroom = cs->hdr_len;
3548
3549         return headroom;
3550 }
3551
3552 static bool
3553 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3554 {
3555         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3556         int skip;
3557
3558         if (end > 0)
3559                 return false;
3560
3561         /* One shot NOA  */
3562         if (data->count[i] == 1)
3563                 return false;
3564
3565         if (data->desc[i].interval == 0)
3566                 return false;
3567
3568         /* End time is in the past, check for repetitions */
3569         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3570         if (data->count[i] < 255) {
3571                 if (data->count[i] <= skip) {
3572                         data->count[i] = 0;
3573                         return false;
3574                 }
3575
3576                 data->count[i] -= skip;
3577         }
3578
3579         data->desc[i].start += skip * data->desc[i].interval;
3580
3581         return true;
3582 }
3583
3584 static bool
3585 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3586                              s32 *offset)
3587 {
3588         bool ret = false;
3589         int i;
3590
3591         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3592                 s32 cur;
3593
3594                 if (!data->count[i])
3595                         continue;
3596
3597                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3598                         ret = true;
3599
3600                 cur = data->desc[i].start - tsf;
3601                 if (cur > *offset)
3602                         continue;
3603
3604                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3605                 if (cur > *offset)
3606                         *offset = cur;
3607         }
3608
3609         return ret;
3610 }
3611
3612 static u32
3613 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3614 {
3615         s32 offset = 0;
3616         int tries = 0;
3617         /*
3618          * arbitrary limit, used to avoid infinite loops when combined NoA
3619          * descriptors cover the full time period.
3620          */
3621         int max_tries = 5;
3622
3623         ieee80211_extend_absent_time(data, tsf, &offset);
3624         do {
3625                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3626                         break;
3627
3628                 tries++;
3629         } while (tries < max_tries);
3630
3631         return offset;
3632 }
3633
3634 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3635 {
3636         u32 next_offset = BIT(31) - 1;
3637         int i;
3638
3639         data->absent = 0;
3640         data->has_next_tsf = false;
3641         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3642                 s32 start;
3643
3644                 if (!data->count[i])
3645                         continue;
3646
3647                 ieee80211_extend_noa_desc(data, tsf, i);
3648                 start = data->desc[i].start - tsf;
3649                 if (start <= 0)
3650                         data->absent |= BIT(i);
3651
3652                 if (next_offset > start)
3653                         next_offset = start;
3654
3655                 data->has_next_tsf = true;
3656         }
3657
3658         if (data->absent)
3659                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3660
3661         data->next_tsf = tsf + next_offset;
3662 }
3663 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3664
3665 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3666                             struct ieee80211_noa_data *data, u32 tsf)
3667 {
3668         int ret = 0;
3669         int i;
3670
3671         memset(data, 0, sizeof(*data));
3672
3673         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3674                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3675
3676                 if (!desc->count || !desc->duration)
3677                         continue;
3678
3679                 data->count[i] = desc->count;
3680                 data->desc[i].start = le32_to_cpu(desc->start_time);
3681                 data->desc[i].duration = le32_to_cpu(desc->duration);
3682                 data->desc[i].interval = le32_to_cpu(desc->interval);
3683
3684                 if (data->count[i] > 1 &&
3685                     data->desc[i].interval < data->desc[i].duration)
3686                         continue;
3687
3688                 ieee80211_extend_noa_desc(data, tsf, i);
3689                 ret++;
3690         }
3691
3692         if (ret)
3693                 ieee80211_update_p2p_noa(data, tsf);
3694
3695         return ret;
3696 }
3697 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3698
3699 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3700                            struct ieee80211_sub_if_data *sdata)
3701 {
3702         u64 tsf = drv_get_tsf(local, sdata);
3703         u64 dtim_count = 0;
3704         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3705         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3706         struct ps_data *ps;
3707         u8 bcns_from_dtim;
3708
3709         if (tsf == -1ULL || !beacon_int || !dtim_period)
3710                 return;
3711
3712         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3713             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3714                 if (!sdata->bss)
3715                         return;
3716
3717                 ps = &sdata->bss->ps;
3718         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3719                 ps = &sdata->u.mesh.ps;
3720         } else {
3721                 return;
3722         }
3723
3724         /*
3725          * actually finds last dtim_count, mac80211 will update in
3726          * __beacon_add_tim().
3727          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3728          */
3729         do_div(tsf, beacon_int);
3730         bcns_from_dtim = do_div(tsf, dtim_period);
3731         /* just had a DTIM */
3732         if (!bcns_from_dtim)
3733                 dtim_count = 0;
3734         else
3735                 dtim_count = dtim_period - bcns_from_dtim;
3736
3737         ps->dtim_count = dtim_count;
3738 }
3739
3740 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3741                                          struct ieee80211_chanctx *ctx)
3742 {
3743         struct ieee80211_sub_if_data *sdata;
3744         u8 radar_detect = 0;
3745
3746         lockdep_assert_held(&local->chanctx_mtx);
3747
3748         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3749                 return 0;
3750
3751         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3752                 if (sdata->reserved_radar_required)
3753                         radar_detect |= BIT(sdata->reserved_chandef.width);
3754
3755         /*
3756          * An in-place reservation context should not have any assigned vifs
3757          * until it replaces the other context.
3758          */
3759         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3760                 !list_empty(&ctx->assigned_vifs));
3761
3762         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3763                 if (sdata->radar_required)
3764                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3765
3766         return radar_detect;
3767 }
3768
3769 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3770                                  const struct cfg80211_chan_def *chandef,
3771                                  enum ieee80211_chanctx_mode chanmode,
3772                                  u8 radar_detect)
3773 {
3774         struct ieee80211_local *local = sdata->local;
3775         struct ieee80211_sub_if_data *sdata_iter;
3776         enum nl80211_iftype iftype = sdata->wdev.iftype;
3777         struct ieee80211_chanctx *ctx;
3778         int total = 1;
3779         struct iface_combination_params params = {
3780                 .radar_detect = radar_detect,
3781         };
3782
3783         lockdep_assert_held(&local->chanctx_mtx);
3784
3785         if (WARN_ON(hweight32(radar_detect) > 1))
3786                 return -EINVAL;
3787
3788         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3789                     !chandef->chan))
3790                 return -EINVAL;
3791
3792         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3793                 return -EINVAL;
3794
3795         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3796             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3797                 /*
3798                  * always passing this is harmless, since it'll be the
3799                  * same value that cfg80211 finds if it finds the same
3800                  * interface ... and that's always allowed
3801                  */
3802                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3803         }
3804
3805         /* Always allow software iftypes */
3806         if (local->hw.wiphy->software_iftypes & BIT(iftype) ||
3807             (iftype == NL80211_IFTYPE_AP_VLAN &&
3808              local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) {
3809                 if (radar_detect)
3810                         return -EINVAL;
3811                 return 0;
3812         }
3813
3814         if (chandef)
3815                 params.num_different_channels = 1;
3816
3817         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3818                 params.iftype_num[iftype] = 1;
3819
3820         list_for_each_entry(ctx, &local->chanctx_list, list) {
3821                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3822                         continue;
3823                 params.radar_detect |=
3824                         ieee80211_chanctx_radar_detect(local, ctx);
3825                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3826                         params.num_different_channels++;
3827                         continue;
3828                 }
3829                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3830                     cfg80211_chandef_compatible(chandef,
3831                                                 &ctx->conf.def))
3832                         continue;
3833                 params.num_different_channels++;
3834         }
3835
3836         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3837                 struct wireless_dev *wdev_iter;
3838
3839                 wdev_iter = &sdata_iter->wdev;
3840
3841                 if (sdata_iter == sdata ||
3842                     !ieee80211_sdata_running(sdata_iter) ||
3843                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3844                         continue;
3845
3846                 params.iftype_num[wdev_iter->iftype]++;
3847                 total++;
3848         }
3849
3850         if (total == 1 && !params.radar_detect)
3851                 return 0;
3852
3853         return cfg80211_check_combinations(local->hw.wiphy, &params);
3854 }
3855
3856 static void
3857 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3858                          void *data)
3859 {
3860         u32 *max_num_different_channels = data;
3861
3862         *max_num_different_channels = max(*max_num_different_channels,
3863                                           c->num_different_channels);
3864 }
3865
3866 int ieee80211_max_num_channels(struct ieee80211_local *local)
3867 {
3868         struct ieee80211_sub_if_data *sdata;
3869         struct ieee80211_chanctx *ctx;
3870         u32 max_num_different_channels = 1;
3871         int err;
3872         struct iface_combination_params params = {0};
3873
3874         lockdep_assert_held(&local->chanctx_mtx);
3875
3876         list_for_each_entry(ctx, &local->chanctx_list, list) {
3877                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3878                         continue;
3879
3880                 params.num_different_channels++;
3881
3882                 params.radar_detect |=
3883                         ieee80211_chanctx_radar_detect(local, ctx);
3884         }
3885
3886         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3887                 params.iftype_num[sdata->wdev.iftype]++;
3888
3889         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3890                                          ieee80211_iter_max_chans,
3891                                          &max_num_different_channels);
3892         if (err < 0)
3893                 return err;
3894
3895         return max_num_different_channels;
3896 }
3897
3898 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3899 {
3900         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3901         *buf++ = 7; /* len */
3902         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3903         *buf++ = 0x50;
3904         *buf++ = 0xf2;
3905         *buf++ = 2; /* WME */
3906         *buf++ = 0; /* WME info */
3907         *buf++ = 1; /* WME ver */
3908         *buf++ = qosinfo; /* U-APSD no in use */
3909
3910         return buf;
3911 }
3912
3913 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3914                              unsigned long *frame_cnt,
3915                              unsigned long *byte_cnt)
3916 {
3917         struct txq_info *txqi = to_txq_info(txq);
3918         u32 frag_cnt = 0, frag_bytes = 0;
3919         struct sk_buff *skb;
3920
3921         skb_queue_walk(&txqi->frags, skb) {
3922                 frag_cnt++;
3923                 frag_bytes += skb->len;
3924         }
3925
3926         if (frame_cnt)
3927                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3928
3929         if (byte_cnt)
3930                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3931 }
3932 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3933
3934 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3935         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3936         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3937         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3938         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3939 };