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
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  49 {
  50         struct sk_buff *skb;
  51         struct ieee80211_hdr *hdr;
  52
  53         skb_queue_walk(&tx->skbs, skb) {
  54                 hdr = (struct ieee80211_hdr *) skb->data;
  55                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  56         }
  57 }
  58
  59 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  60                              int rate, int erp, int short_preamble,
  61                              int shift)
  62 {
  63         int dur;
  64
  65         /* calculate duration (in microseconds, rounded up to next higher
  66          * integer if it includes a fractional microsecond) to send frame of
  67          * len bytes (does not include FCS) at the given rate. Duration will
  68          * also include SIFS.
  69          *
  70          * rate is in 100 kbps, so divident is multiplied by 10 in the
  71          * DIV_ROUND_UP() operations.
  72          *
  73          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  74          * is assumed to be 0 otherwise.
  75          */
  76
  77         if (band == NL80211_BAND_5GHZ || erp) {
  78                 /*
  79                  * OFDM:
  80                  *
  81                  * N_DBPS = DATARATE x 4
  82                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  83                  *      (16 = SIGNAL time, 6 = tail bits)
  84                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  85                  *
  86                  * T_SYM = 4 usec
  87                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  88                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  89                  *      signal ext = 6 usec
  90                  */
  91                 dur = 16; /* SIFS + signal ext */
  92                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  93                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  94
  95                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  96                  *  * times 4 for 5 MHz
  97                  *  * times 2 for 10 MHz
  98                  */
  99                 dur *= 1 << shift;
 100
 101                 /* rates should already consider the channel bandwidth,
 102                  * don't apply divisor again.
 103                  */
 104                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 105                                         4 * rate); /* T_SYM x N_SYM */
 106         } else {
 107                 /*
 108                  * 802.11b or 802.11g with 802.11b compatibility:
 109                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 110                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 111                  *
 112                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 113                  * aSIFSTime = 10 usec
 114                  * aPreambleLength = 144 usec or 72 usec with short preamble
 115                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 116                  */
 117                 dur = 10; /* aSIFSTime = 10 usec */
 118                 dur += short_preamble ? (72 + 24) : (144 + 48);
 119
 120                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 121         }
 122
 123         return dur;
 124 }
 125
 126 /* Exported duration function for driver use */
 127 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 128                                         struct ieee80211_vif *vif,
 129                                         enum nl80211_band band,
 130                                         size_t frame_len,
 131                                         struct ieee80211_rate *rate)
 132 {
 133         struct ieee80211_sub_if_data *sdata;
 134         u16 dur;
 135         int erp, shift = 0;
 136         bool short_preamble = false;
 137
 138         erp = 0;
 139         if (vif) {
 140                 sdata = vif_to_sdata(vif);
 141                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 142                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 143                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 144                 shift = ieee80211_vif_get_shift(vif);
 145         }
 146
 147         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 148                                        short_preamble, shift);
 149
 150         return cpu_to_le16(dur);
 151 }
 152 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 153
 154 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 155                               struct ieee80211_vif *vif, size_t frame_len,
 156                               const struct ieee80211_tx_info *frame_txctl)
 157 {
 158         struct ieee80211_local *local = hw_to_local(hw);
 159         struct ieee80211_rate *rate;
 160         struct ieee80211_sub_if_data *sdata;
 161         bool short_preamble;
 162         int erp, shift = 0, bitrate;
 163         u16 dur;
 164         struct ieee80211_supported_band *sband;
 165
 166         sband = local->hw.wiphy->bands[frame_txctl->band];
 167
 168         short_preamble = false;
 169
 170         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 171
 172         erp = 0;
 173         if (vif) {
 174                 sdata = vif_to_sdata(vif);
 175                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 176                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 177                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 178                 shift = ieee80211_vif_get_shift(vif);
 179         }
 180
 181         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 182
 183         /* CTS duration */
 184         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 185                                        erp, short_preamble, shift);
 186         /* Data frame duration */
 187         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 188                                         erp, short_preamble, shift);
 189         /* ACK duration */
 190         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 191                                         erp, short_preamble, shift);
 192
 193         return cpu_to_le16(dur);
 194 }
 195 EXPORT_SYMBOL(ieee80211_rts_duration);
 196
 197 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 198                                     struct ieee80211_vif *vif,
 199                                     size_t frame_len,
 200                                     const struct ieee80211_tx_info *frame_txctl)
 201 {
 202         struct ieee80211_local *local = hw_to_local(hw);
 203         struct ieee80211_rate *rate;
 204         struct ieee80211_sub_if_data *sdata;
 205         bool short_preamble;
 206         int erp, shift = 0, bitrate;
 207         u16 dur;
 208         struct ieee80211_supported_band *sband;
 209
 210         sband = local->hw.wiphy->bands[frame_txctl->band];
 211
 212         short_preamble = false;
 213
 214         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 215         erp = 0;
 216         if (vif) {
 217                 sdata = vif_to_sdata(vif);
 218                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 219                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 220                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 221                 shift = ieee80211_vif_get_shift(vif);
 222         }
 223
 224         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 225
 226         /* Data frame duration */
 227         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 228                                        erp, short_preamble, shift);
 229         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 230                 /* ACK duration */
 231                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 232                                                 erp, short_preamble, shift);
 233         }
 234
 235         return cpu_to_le16(dur);
 236 }
 237 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 238
 239 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 240 {
 241         struct ieee80211_local *local = sdata->local;
 242         struct ieee80211_vif *vif = &sdata->vif;
 243         struct fq *fq = &local->fq;
 244         struct ps_data *ps = NULL;
 245         struct txq_info *txqi;
 246         struct sta_info *sta;
 247         int i;
 248
 249         local_bh_disable();
 250         spin_lock(&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(&fq->lock);
 277                         drv_wake_tx_queue(local, txqi);
 278                         spin_lock(&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(&fq->lock);
 292
 293         drv_wake_tx_queue(local, txqi);
 294         local_bh_enable();
 295         return;
 296 out:
 297         spin_unlock(&fq->lock);
 298         local_bh_enable();
 299 }
 300
 301 static void
 302 __releases(&local->queue_stop_reason_lock)
 303 __acquires(&local->queue_stop_reason_lock)
 304 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 305 {
 306         struct ieee80211_sub_if_data *sdata;
 307         int n_acs = IEEE80211_NUM_ACS;
 308         int i;
 309
 310         rcu_read_lock();
 311
 312         if (local->hw.queues < IEEE80211_NUM_ACS)
 313                 n_acs = 1;
 314
 315         for (i = 0; i < local->hw.queues; i++) {
 316                 if (local->queue_stop_reasons[i])
 317                         continue;
 318
 319                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 320                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 321                         int ac;
 322
 323                         for (ac = 0; ac < n_acs; ac++) {
 324                                 int ac_queue = sdata->vif.hw_queue[ac];
 325
 326                                 if (ac_queue == i ||
 327                                     sdata->vif.cab_queue == i)
 328                                         __ieee80211_wake_txqs(sdata, ac);
 329                         }
 330                 }
 331                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 332         }
 333
 334         rcu_read_unlock();
 335 }
 336
 337 void ieee80211_wake_txqs(unsigned long data)
 338 {
 339         struct ieee80211_local *local = (struct ieee80211_local *)data;
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 343         _ieee80211_wake_txqs(local, &flags);
 344         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 345 }
 346
 347 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 348 {
 349         struct ieee80211_sub_if_data *sdata;
 350         int n_acs = IEEE80211_NUM_ACS;
 351
 352         if (local->ops->wake_tx_queue)
 353                 return;
 354
 355         if (local->hw.queues < IEEE80211_NUM_ACS)
 356                 n_acs = 1;
 357
 358         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 359                 int ac;
 360
 361                 if (!sdata->dev)
 362                         continue;
 363
 364                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 365                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 366                         continue;
 367
 368                 for (ac = 0; ac < n_acs; ac++) {
 369                         int ac_queue = sdata->vif.hw_queue[ac];
 370
 371                         if (ac_queue == queue ||
 372                             (sdata->vif.cab_queue == queue &&
 373                              local->queue_stop_reasons[ac_queue] == 0 &&
 374                              skb_queue_empty(&local->pending[ac_queue])))
 375                                 netif_wake_subqueue(sdata->dev, ac);
 376                 }
 377         }
 378 }
 379
 380 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 381                                    enum queue_stop_reason reason,
 382                                    bool refcounted,
 383                                    unsigned long *flags)
 384 {
 385         struct ieee80211_local *local = hw_to_local(hw);
 386
 387         trace_wake_queue(local, queue, reason);
 388
 389         if (WARN_ON(queue >= hw->queues))
 390                 return;
 391
 392         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 393                 return;
 394
 395         if (!refcounted) {
 396                 local->q_stop_reasons[queue][reason] = 0;
 397         } else {
 398                 local->q_stop_reasons[queue][reason]--;
 399                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 400                         local->q_stop_reasons[queue][reason] = 0;
 401         }
 402
 403         if (local->q_stop_reasons[queue][reason] == 0)
 404                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 405
 406         if (local->queue_stop_reasons[queue] != 0)
 407                 /* someone still has this queue stopped */
 408                 return;
 409
 410         if (skb_queue_empty(&local->pending[queue])) {
 411                 rcu_read_lock();
 412                 ieee80211_propagate_queue_wake(local, queue);
 413                 rcu_read_unlock();
 414         } else
 415                 tasklet_schedule(&local->tx_pending_tasklet);
 416
 417         /*
 418          * Calling _ieee80211_wake_txqs here can be a problem because it may
 419          * release queue_stop_reason_lock which has been taken by
 420          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 421          * release someone's lock, but it is fine because all the callers of
 422          * __ieee80211_wake_queue call it right before releasing the lock.
 423          */
 424         if (local->ops->wake_tx_queue) {
 425                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 426                         tasklet_schedule(&local->wake_txqs_tasklet);
 427                 else
 428                         _ieee80211_wake_txqs(local, flags);
 429         }
 430 }
 431
 432 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 433                                     enum queue_stop_reason reason,
 434                                     bool refcounted)
 435 {
 436         struct ieee80211_local *local = hw_to_local(hw);
 437         unsigned long flags;
 438
 439         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 440         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 441         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 442 }
 443
 444 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 445 {
 446         ieee80211_wake_queue_by_reason(hw, queue,
 447                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 448                                        false);
 449 }
 450 EXPORT_SYMBOL(ieee80211_wake_queue);
 451
 452 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 453                                    enum queue_stop_reason reason,
 454                                    bool refcounted)
 455 {
 456         struct ieee80211_local *local = hw_to_local(hw);
 457         struct ieee80211_sub_if_data *sdata;
 458         int n_acs = IEEE80211_NUM_ACS;
 459
 460         trace_stop_queue(local, queue, reason);
 461
 462         if (WARN_ON(queue >= hw->queues))
 463                 return;
 464
 465         if (!refcounted)
 466                 local->q_stop_reasons[queue][reason] = 1;
 467         else
 468                 local->q_stop_reasons[queue][reason]++;
 469
 470         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 471                 return;
 472
 473         if (local->hw.queues < IEEE80211_NUM_ACS)
 474                 n_acs = 1;
 475
 476         rcu_read_lock();
 477         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 478                 int ac;
 479
 480                 if (!sdata->dev)
 481                         continue;
 482
 483                 for (ac = 0; ac < n_acs; ac++) {
 484                         if (sdata->vif.hw_queue[ac] == queue ||
 485                             sdata->vif.cab_queue == queue) {
 486                                 if (!local->ops->wake_tx_queue) {
 487                                         netif_stop_subqueue(sdata->dev, ac);
 488                                         continue;
 489                                 }
 490                                 spin_lock(&local->fq.lock);
 491                                 sdata->vif.txqs_stopped[ac] = true;
 492                                 spin_unlock(&local->fq.lock);
 493                         }
 494                 }
 495         }
 496         rcu_read_unlock();
 497 }
 498
 499 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 500                                     enum queue_stop_reason reason,
 501                                     bool refcounted)
 502 {
 503         struct ieee80211_local *local = hw_to_local(hw);
 504         unsigned long flags;
 505
 506         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 507         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 508         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 509 }
 510
 511 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 512 {
 513         ieee80211_stop_queue_by_reason(hw, queue,
 514                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 515                                        false);
 516 }
 517 EXPORT_SYMBOL(ieee80211_stop_queue);
 518
 519 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 520                                struct sk_buff *skb)
 521 {
 522         struct ieee80211_hw *hw = &local->hw;
 523         unsigned long flags;
 524         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 525         int queue = info->hw_queue;
 526
 527         if (WARN_ON(!info->control.vif)) {
 528                 ieee80211_free_txskb(&local->hw, skb);
 529                 return;
 530         }
 531
 532         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 533         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 534                                false);
 535         __skb_queue_tail(&local->pending[queue], skb);
 536         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 537                                false, &flags);
 538         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 539 }
 540
 541 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 542                                 struct sk_buff_head *skbs)
 543 {
 544         struct ieee80211_hw *hw = &local->hw;
 545         struct sk_buff *skb;
 546         unsigned long flags;
 547         int queue, i;
 548
 549         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 550         while ((skb = skb_dequeue(skbs))) {
 551                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 552
 553                 if (WARN_ON(!info->control.vif)) {
 554                         ieee80211_free_txskb(&local->hw, skb);
 555                         continue;
 556                 }
 557
 558                 queue = info->hw_queue;
 559
 560                 __ieee80211_stop_queue(hw, queue,
 561                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 562                                 false);
 563
 564                 __skb_queue_tail(&local->pending[queue], skb);
 565         }
 566
 567         for (i = 0; i < hw->queues; i++)
 568                 __ieee80211_wake_queue(hw, i,
 569                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 570                         false, &flags);
 571         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 572 }
 573
 574 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 575                                      unsigned long queues,
 576                                      enum queue_stop_reason reason,
 577                                      bool refcounted)
 578 {
 579         struct ieee80211_local *local = hw_to_local(hw);
 580         unsigned long flags;
 581         int i;
 582
 583         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 584
 585         for_each_set_bit(i, &queues, hw->queues)
 586                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 587
 588         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 589 }
 590
 591 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 592 {
 593         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 594                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 595                                         false);
 596 }
 597 EXPORT_SYMBOL(ieee80211_stop_queues);
 598
 599 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 600 {
 601         struct ieee80211_local *local = hw_to_local(hw);
 602         unsigned long flags;
 603         int ret;
 604
 605         if (WARN_ON(queue >= hw->queues))
 606                 return true;
 607
 608         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 609         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 610                        &local->queue_stop_reasons[queue]);
 611         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 612         return ret;
 613 }
 614 EXPORT_SYMBOL(ieee80211_queue_stopped);
 615
 616 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 617                                      unsigned long queues,
 618                                      enum queue_stop_reason reason,
 619                                      bool refcounted)
 620 {
 621         struct ieee80211_local *local = hw_to_local(hw);
 622         unsigned long flags;
 623         int i;
 624
 625         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 626
 627         for_each_set_bit(i, &queues, hw->queues)
 628                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 629
 630         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 631 }
 632
 633 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 634 {
 635         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 636                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 637                                         false);
 638 }
 639 EXPORT_SYMBOL(ieee80211_wake_queues);
 640
 641 static unsigned int
 642 ieee80211_get_vif_queues(struct ieee80211_local *local,
 643                          struct ieee80211_sub_if_data *sdata)
 644 {
 645         unsigned int queues;
 646
 647         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 648                 int ac;
 649
 650                 queues = 0;
 651
 652                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 653                         queues |= BIT(sdata->vif.hw_queue[ac]);
 654                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 655                         queues |= BIT(sdata->vif.cab_queue);
 656         } else {
 657                 /* all queues */
 658                 queues = BIT(local->hw.queues) - 1;
 659         }
 660
 661         return queues;
 662 }
 663
 664 void __ieee80211_flush_queues(struct ieee80211_local *local,
 665                               struct ieee80211_sub_if_data *sdata,
 666                               unsigned int queues, bool drop)
 667 {
 668         if (!local->ops->flush)
 669                 return;
 670
 671         /*
 672          * If no queue was set, or if the HW doesn't support
 673          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 674          */
 675         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 676                 queues = ieee80211_get_vif_queues(local, sdata);
 677
 678         ieee80211_stop_queues_by_reason(&local->hw, queues,
 679                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 680                                         false);
 681
 682         drv_flush(local, sdata, queues, drop);
 683
 684         ieee80211_wake_queues_by_reason(&local->hw, queues,
 685                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 686                                         false);
 687 }
 688
 689 void ieee80211_flush_queues(struct ieee80211_local *local,
 690                             struct ieee80211_sub_if_data *sdata, bool drop)
 691 {
 692         __ieee80211_flush_queues(local, sdata, 0, drop);
 693 }
 694
 695 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 696                                struct ieee80211_sub_if_data *sdata,
 697                                enum queue_stop_reason reason)
 698 {
 699         ieee80211_stop_queues_by_reason(&local->hw,
 700                                         ieee80211_get_vif_queues(local, sdata),
 701                                         reason, true);
 702 }
 703
 704 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 705                                struct ieee80211_sub_if_data *sdata,
 706                                enum queue_stop_reason reason)
 707 {
 708         ieee80211_wake_queues_by_reason(&local->hw,
 709                                         ieee80211_get_vif_queues(local, sdata),
 710                                         reason, true);
 711 }
 712
 713 static void __iterate_interfaces(struct ieee80211_local *local,
 714                                  u32 iter_flags,
 715                                  void (*iterator)(void *data, u8 *mac,
 716                                                   struct ieee80211_vif *vif),
 717                                  void *data)
 718 {
 719         struct ieee80211_sub_if_data *sdata;
 720         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 721
 722         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 723                 switch (sdata->vif.type) {
 724                 case NL80211_IFTYPE_MONITOR:
 725                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 726                                 continue;
 727                         break;
 728                 case NL80211_IFTYPE_AP_VLAN:
 729                         continue;
 730                 default:
 731                         break;
 732                 }
 733                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 734                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 735                         continue;
 736                 if (ieee80211_sdata_running(sdata) || !active_only)
 737                         iterator(data, sdata->vif.addr,
 738                                  &sdata->vif);
 739         }
 740
 741         sdata = rcu_dereference_check(local->monitor_sdata,
 742                                       lockdep_is_held(&local->iflist_mtx) ||
 743                                       lockdep_rtnl_is_held());
 744         if (sdata &&
 745             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 746              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 747                 iterator(data, sdata->vif.addr, &sdata->vif);
 748 }
 749
 750 void ieee80211_iterate_interfaces(
 751         struct ieee80211_hw *hw, u32 iter_flags,
 752         void (*iterator)(void *data, u8 *mac,
 753                          struct ieee80211_vif *vif),
 754         void *data)
 755 {
 756         struct ieee80211_local *local = hw_to_local(hw);
 757
 758         mutex_lock(&local->iflist_mtx);
 759         __iterate_interfaces(local, iter_flags, iterator, data);
 760         mutex_unlock(&local->iflist_mtx);
 761 }
 762 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 763
 764 void ieee80211_iterate_active_interfaces_atomic(
 765         struct ieee80211_hw *hw, u32 iter_flags,
 766         void (*iterator)(void *data, u8 *mac,
 767                          struct ieee80211_vif *vif),
 768         void *data)
 769 {
 770         struct ieee80211_local *local = hw_to_local(hw);
 771
 772         rcu_read_lock();
 773         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 774                              iterator, data);
 775         rcu_read_unlock();
 776 }
 777 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 778
 779 void ieee80211_iterate_active_interfaces_rtnl(
 780         struct ieee80211_hw *hw, u32 iter_flags,
 781         void (*iterator)(void *data, u8 *mac,
 782                          struct ieee80211_vif *vif),
 783         void *data)
 784 {
 785         struct ieee80211_local *local = hw_to_local(hw);
 786
 787         ASSERT_RTNL();
 788
 789         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 790                              iterator, data);
 791 }
 792 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 793
 794 static void __iterate_stations(struct ieee80211_local *local,
 795                                void (*iterator)(void *data,
 796                                                 struct ieee80211_sta *sta),
 797                                void *data)
 798 {
 799         struct sta_info *sta;
 800
 801         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 802                 if (!sta->uploaded)
 803                         continue;
 804
 805                 iterator(data, &sta->sta);
 806         }
 807 }
 808
 809 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 810                         void (*iterator)(void *data,
 811                                          struct ieee80211_sta *sta),
 812                         void *data)
 813 {
 814         struct ieee80211_local *local = hw_to_local(hw);
 815
 816         rcu_read_lock();
 817         __iterate_stations(local, iterator, data);
 818         rcu_read_unlock();
 819 }
 820 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 821
 822 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 823 {
 824         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 825
 826         if (!ieee80211_sdata_running(sdata) ||
 827             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 828                 return NULL;
 829         return &sdata->vif;
 830 }
 831 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 832
 833 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 834 {
 835         struct ieee80211_sub_if_data *sdata;
 836
 837         if (!vif)
 838                 return NULL;
 839
 840         sdata = vif_to_sdata(vif);
 841
 842         if (!ieee80211_sdata_running(sdata) ||
 843             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 844                 return NULL;
 845
 846         return &sdata->wdev;
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 849
 850 /*
 851  * Nothing should have been stuffed into the workqueue during
 852  * the suspend->resume cycle. Since we can't check each caller
 853  * of this function if we are already quiescing / suspended,
 854  * check here and don't WARN since this can actually happen when
 855  * the rx path (for example) is racing against __ieee80211_suspend
 856  * and suspending / quiescing was set after the rx path checked
 857  * them.
 858  */
 859 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 860 {
 861         if (local->quiescing || (local->suspended && !local->resuming)) {
 862                 pr_warn("queueing ieee80211 work while going to suspend\n");
 863                 return false;
 864         }
 865
 866         return true;
 867 }
 868
 869 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 870 {
 871         struct ieee80211_local *local = hw_to_local(hw);
 872
 873         if (!ieee80211_can_queue_work(local))
 874                 return;
 875
 876         queue_work(local->workqueue, work);
 877 }
 878 EXPORT_SYMBOL(ieee80211_queue_work);
 879
 880 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 881                                   struct delayed_work *dwork,
 882                                   unsigned long delay)
 883 {
 884         struct ieee80211_local *local = hw_to_local(hw);
 885
 886         if (!ieee80211_can_queue_work(local))
 887                 return;
 888
 889         queue_delayed_work(local->workqueue, dwork, delay);
 890 }
 891 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 892
 893 static u32
 894 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 895                             struct ieee802_11_elems *elems,
 896                             u64 filter, u32 crc,
 897                             const struct element *check_inherit)
 898 {
 899         const struct element *elem;
 900         bool calc_crc = filter != 0;
 901         DECLARE_BITMAP(seen_elems, 256);
 902         const u8 *ie;
 903
 904         bitmap_zero(seen_elems, 256);
 905
 906         for_each_element(elem, start, len) {
 907                 bool elem_parse_failed;
 908                 u8 id = elem->id;
 909                 u8 elen = elem->datalen;
 910                 const u8 *pos = elem->data;
 911
 912                 if (check_inherit &&
 913                     !cfg80211_is_element_inherited(elem,
 914                                                    check_inherit))
 915                         continue;
 916
 917                 switch (id) {
 918                 case WLAN_EID_SSID:
 919                 case WLAN_EID_SUPP_RATES:
 920                 case WLAN_EID_FH_PARAMS:
 921                 case WLAN_EID_DS_PARAMS:
 922                 case WLAN_EID_CF_PARAMS:
 923                 case WLAN_EID_TIM:
 924                 case WLAN_EID_IBSS_PARAMS:
 925                 case WLAN_EID_CHALLENGE:
 926                 case WLAN_EID_RSN:
 927                 case WLAN_EID_ERP_INFO:
 928                 case WLAN_EID_EXT_SUPP_RATES:
 929                 case WLAN_EID_HT_CAPABILITY:
 930                 case WLAN_EID_HT_OPERATION:
 931                 case WLAN_EID_VHT_CAPABILITY:
 932                 case WLAN_EID_VHT_OPERATION:
 933                 case WLAN_EID_MESH_ID:
 934                 case WLAN_EID_MESH_CONFIG:
 935                 case WLAN_EID_PEER_MGMT:
 936                 case WLAN_EID_PREQ:
 937                 case WLAN_EID_PREP:
 938                 case WLAN_EID_PERR:
 939                 case WLAN_EID_RANN:
 940                 case WLAN_EID_CHANNEL_SWITCH:
 941                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 942                 case WLAN_EID_COUNTRY:
 943                 case WLAN_EID_PWR_CONSTRAINT:
 944                 case WLAN_EID_TIMEOUT_INTERVAL:
 945                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 946                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 947                 case WLAN_EID_CHAN_SWITCH_PARAM:
 948                 case WLAN_EID_EXT_CAPABILITY:
 949                 case WLAN_EID_CHAN_SWITCH_TIMING:
 950                 case WLAN_EID_LINK_ID:
 951                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 952                 /*
 953                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 954                  * that if the content gets bigger it might be needed more than once
 955                  */
 956                         if (test_bit(id, seen_elems)) {
 957                                 elems->parse_error = true;
 958                                 continue;
 959                         }
 960                         break;
 961                 }
 962
 963                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 964                         crc = crc32_be(crc, pos - 2, elen + 2);
 965
 966                 elem_parse_failed = false;
 967
 968                 switch (id) {
 969                 case WLAN_EID_LINK_ID:
 970                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 971                                 elem_parse_failed = true;
 972                                 break;
 973                         }
 974                         elems->lnk_id = (void *)(pos - 2);
 975                         break;
 976                 case WLAN_EID_CHAN_SWITCH_TIMING:
 977                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 978                                 elem_parse_failed = true;
 979                                 break;
 980                         }
 981                         elems->ch_sw_timing = (void *)pos;
 982                         break;
 983                 case WLAN_EID_EXT_CAPABILITY:
 984                         elems->ext_capab = pos;
 985                         elems->ext_capab_len = elen;
 986                         break;
 987                 case WLAN_EID_SSID:
 988                         elems->ssid = pos;
 989                         elems->ssid_len = elen;
 990                         break;
 991                 case WLAN_EID_SUPP_RATES:
 992                         elems->supp_rates = pos;
 993                         elems->supp_rates_len = elen;
 994                         break;
 995                 case WLAN_EID_DS_PARAMS:
 996                         if (elen >= 1)
 997                                 elems->ds_params = pos;
 998                         else
 999                                 elem_parse_failed = true;
1000                         break;
1001                 case WLAN_EID_TIM:
1002                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1003                                 elems->tim = (void *)pos;
1004                                 elems->tim_len = elen;
1005                         } else
1006                                 elem_parse_failed = true;
1007                         break;
1008                 case WLAN_EID_CHALLENGE:
1009                         elems->challenge = pos;
1010                         elems->challenge_len = elen;
1011                         break;
1012                 case WLAN_EID_VENDOR_SPECIFIC:
1013                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1014                             pos[2] == 0xf2) {
1015                                 /* Microsoft OUI (00:50:F2) */
1016
1017                                 if (calc_crc)
1018                                         crc = crc32_be(crc, pos - 2, elen + 2);
1019
1020                                 if (elen >= 5 && pos[3] == 2) {
1021                                         /* OUI Type 2 - WMM IE */
1022                                         if (pos[4] == 0) {
1023                                                 elems->wmm_info = pos;
1024                                                 elems->wmm_info_len = elen;
1025                                         } else if (pos[4] == 1) {
1026                                                 elems->wmm_param = pos;
1027                                                 elems->wmm_param_len = elen;
1028                                         }
1029                                 }
1030                         }
1031                         break;
1032                 case WLAN_EID_RSN:
1033                         elems->rsn = pos;
1034                         elems->rsn_len = elen;
1035                         break;
1036                 case WLAN_EID_ERP_INFO:
1037                         if (elen >= 1)
1038                                 elems->erp_info = pos;
1039                         else
1040                                 elem_parse_failed = true;
1041                         break;
1042                 case WLAN_EID_EXT_SUPP_RATES:
1043                         elems->ext_supp_rates = pos;
1044                         elems->ext_supp_rates_len = elen;
1045                         break;
1046                 case WLAN_EID_HT_CAPABILITY:
1047                         if (elen >= sizeof(struct ieee80211_ht_cap))
1048                                 elems->ht_cap_elem = (void *)pos;
1049                         else
1050                                 elem_parse_failed = true;
1051                         break;
1052                 case WLAN_EID_HT_OPERATION:
1053                         if (elen >= sizeof(struct ieee80211_ht_operation))
1054                                 elems->ht_operation = (void *)pos;
1055                         else
1056                                 elem_parse_failed = true;
1057                         break;
1058                 case WLAN_EID_VHT_CAPABILITY:
1059                         if (elen >= sizeof(struct ieee80211_vht_cap))
1060                                 elems->vht_cap_elem = (void *)pos;
1061                         else
1062                                 elem_parse_failed = true;
1063                         break;
1064                 case WLAN_EID_VHT_OPERATION:
1065                         if (elen >= sizeof(struct ieee80211_vht_operation))
1066                                 elems->vht_operation = (void *)pos;
1067                         else
1068                                 elem_parse_failed = true;
1069                         break;
1070                 case WLAN_EID_OPMODE_NOTIF:
1071                         if (elen > 0)
1072                                 elems->opmode_notif = pos;
1073                         else
1074                                 elem_parse_failed = true;
1075                         break;
1076                 case WLAN_EID_MESH_ID:
1077                         elems->mesh_id = pos;
1078                         elems->mesh_id_len = elen;
1079                         break;
1080                 case WLAN_EID_MESH_CONFIG:
1081                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1082                                 elems->mesh_config = (void *)pos;
1083                         else
1084                                 elem_parse_failed = true;
1085                         break;
1086                 case WLAN_EID_PEER_MGMT:
1087                         elems->peering = pos;
1088                         elems->peering_len = elen;
1089                         break;
1090                 case WLAN_EID_MESH_AWAKE_WINDOW:
1091                         if (elen >= 2)
1092                                 elems->awake_window = (void *)pos;
1093                         break;
1094                 case WLAN_EID_PREQ:
1095                         elems->preq = pos;
1096                         elems->preq_len = elen;
1097                         break;
1098                 case WLAN_EID_PREP:
1099                         elems->prep = pos;
1100                         elems->prep_len = elen;
1101                         break;
1102                 case WLAN_EID_PERR:
1103                         elems->perr = pos;
1104                         elems->perr_len = elen;
1105                         break;
1106                 case WLAN_EID_RANN:
1107                         if (elen >= sizeof(struct ieee80211_rann_ie))
1108                                 elems->rann = (void *)pos;
1109                         else
1110                                 elem_parse_failed = true;
1111                         break;
1112                 case WLAN_EID_CHANNEL_SWITCH:
1113                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1114                                 elem_parse_failed = true;
1115                                 break;
1116                         }
1117                         elems->ch_switch_ie = (void *)pos;
1118                         break;
1119                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1120                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1121                                 elem_parse_failed = true;
1122                                 break;
1123                         }
1124                         elems->ext_chansw_ie = (void *)pos;
1125                         break;
1126                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1127                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1128                                 elem_parse_failed = true;
1129                                 break;
1130                         }
1131                         elems->sec_chan_offs = (void *)pos;
1132                         break;
1133                 case WLAN_EID_CHAN_SWITCH_PARAM:
1134                         if (elen !=
1135                             sizeof(*elems->mesh_chansw_params_ie)) {
1136                                 elem_parse_failed = true;
1137                                 break;
1138                         }
1139                         elems->mesh_chansw_params_ie = (void *)pos;
1140                         break;
1141                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1142                         if (!action ||
1143                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1144                                 elem_parse_failed = true;
1145                                 break;
1146                         }
1147                         elems->wide_bw_chansw_ie = (void *)pos;
1148                         break;
1149                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1150                         if (action) {
1151                                 elem_parse_failed = true;
1152                                 break;
1153                         }
1154                         /*
1155                          * This is a bit tricky, but as we only care about
1156                          * the wide bandwidth channel switch element, so
1157                          * just parse it out manually.
1158                          */
1159                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1160                                               pos, elen);
1161                         if (ie) {
1162                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1163                                         elems->wide_bw_chansw_ie =
1164                                                 (void *)(ie + 2);
1165                                 else
1166                                         elem_parse_failed = true;
1167                         }
1168                         break;
1169                 case WLAN_EID_COUNTRY:
1170                         elems->country_elem = pos;
1171                         elems->country_elem_len = elen;
1172                         break;
1173                 case WLAN_EID_PWR_CONSTRAINT:
1174                         if (elen != 1) {
1175                                 elem_parse_failed = true;
1176                                 break;
1177                         }
1178                         elems->pwr_constr_elem = pos;
1179                         break;
1180                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1181                         /* Lots of different options exist, but we only care
1182                          * about the Dynamic Transmit Power Control element.
1183                          * First check for the Cisco OUI, then for the DTPC
1184                          * tag (0x00).
1185                          */
1186                         if (elen < 4) {
1187                                 elem_parse_failed = true;
1188                                 break;
1189                         }
1190
1191                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1192                             pos[2] != 0x96 || pos[3] != 0x00)
1193                                 break;
1194
1195                         if (elen != 6) {
1196                                 elem_parse_failed = true;
1197                                 break;
1198                         }
1199
1200                         if (calc_crc)
1201                                 crc = crc32_be(crc, pos - 2, elen + 2);
1202
1203                         elems->cisco_dtpc_elem = pos;
1204                         break;
1205                 case WLAN_EID_ADDBA_EXT:
1206                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1207                                 elem_parse_failed = true;
1208                                 break;
1209                         }
1210                         elems->addba_ext_ie = (void *)pos;
1211                         break;
1212                 case WLAN_EID_TIMEOUT_INTERVAL:
1213                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1214                                 elems->timeout_int = (void *)pos;
1215                         else
1216                                 elem_parse_failed = true;
1217                         break;
1218                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1219                         if (elen >= sizeof(*elems->max_idle_period_ie))
1220                                 elems->max_idle_period_ie = (void *)pos;
1221                         break;
1222                 case WLAN_EID_EXTENSION:
1223                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1224                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1225                                 elems->mu_edca_param_set = (void *)&pos[1];
1226                                 if (calc_crc)
1227                                         crc = crc32_be(crc, pos - 2, elen + 2);
1228                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1229                                 elems->he_cap = (void *)&pos[1];
1230                                 elems->he_cap_len = elen - 1;
1231                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1232                                    elen >= sizeof(*elems->he_operation) &&
1233                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1234                                 elems->he_operation = (void *)&pos[1];
1235                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1236                                 elems->uora_element = (void *)&pos[1];
1237                         } else if (pos[0] ==
1238                                    WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1239                                    elen == 4) {
1240                                 elems->max_channel_switch_time = pos + 1;
1241                         } else if (pos[0] ==
1242                                    WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1243                                    elen == 3) {
1244                                 elems->mbssid_config_ie = (void *)&pos[1];
1245                         } else if (pos[0] == WLAN_EID_EXT_HE_SPR &&
1246                                    elen >= sizeof(*elems->he_spr) &&
1247                                    elen >= ieee80211_he_spr_size(&pos[1])) {
1248                                 elems->he_spr = (void *)&pos[1];
1249                         }
1250                         break;
1251                 default:
1252                         break;
1253                 }
1254
1255                 if (elem_parse_failed)
1256                         elems->parse_error = true;
1257                 else
1258                         __set_bit(id, seen_elems);
1259         }
1260
1261         if (!for_each_element_completed(elem, start, len))
1262                 elems->parse_error = true;
1263
1264         return crc;
1265 }
1266
1267 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1268                                             struct ieee802_11_elems *elems,
1269                                             u8 *transmitter_bssid,
1270                                             u8 *bss_bssid,
1271                                             u8 *nontransmitted_profile)
1272 {
1273         const struct element *elem, *sub;
1274         size_t profile_len = 0;
1275         bool found = false;
1276
1277         if (!bss_bssid || !transmitter_bssid)
1278                 return profile_len;
1279
1280         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1281                 if (elem->datalen < 2)
1282                         continue;
1283
1284                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1285                         u8 new_bssid[ETH_ALEN];
1286                         const u8 *index;
1287
1288                         if (sub->id != 0 || sub->datalen < 4) {
1289                                 /* not a valid BSS profile */
1290                                 continue;
1291                         }
1292
1293                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1294                             sub->data[1] != 2) {
1295                                 /* The first element of the
1296                                  * Nontransmitted BSSID Profile is not
1297                                  * the Nontransmitted BSSID Capability
1298                                  * element.
1299                                  */
1300                                 continue;
1301                         }
1302
1303                         memset(nontransmitted_profile, 0, len);
1304                         profile_len = cfg80211_merge_profile(start, len,
1305                                                              elem,
1306                                                              sub,
1307                                                              nontransmitted_profile,
1308                                                              len);
1309
1310                         /* found a Nontransmitted BSSID Profile */
1311                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1312                                                  nontransmitted_profile,
1313                                                  profile_len);
1314                         if (!index || index[1] < 1 || index[2] == 0) {
1315                                 /* Invalid MBSSID Index element */
1316                                 continue;
1317                         }
1318
1319                         cfg80211_gen_new_bssid(transmitter_bssid,
1320                                                elem->data[0],
1321                                                index[2],
1322                                                new_bssid);
1323                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1324                                 found = true;
1325                                 elems->bssid_index_len = index[1];
1326                                 elems->bssid_index = (void *)&index[2];
1327                                 break;
1328                         }
1329                 }
1330         }
1331
1332         return found ? profile_len : 0;
1333 }
1334
1335 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1336                                struct ieee802_11_elems *elems,
1337                                u64 filter, u32 crc, u8 *transmitter_bssid,
1338                                u8 *bss_bssid)
1339 {
1340         const struct element *non_inherit = NULL;
1341         u8 *nontransmitted_profile;
1342         int nontransmitted_profile_len = 0;
1343
1344         memset(elems, 0, sizeof(*elems));
1345         elems->ie_start = start;
1346         elems->total_len = len;
1347
1348         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1349         if (nontransmitted_profile) {
1350                 nontransmitted_profile_len =
1351                         ieee802_11_find_bssid_profile(start, len, elems,
1352                                                       transmitter_bssid,
1353                                                       bss_bssid,
1354                                                       nontransmitted_profile);
1355                 non_inherit =
1356                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1357                                                nontransmitted_profile,
1358                                                nontransmitted_profile_len);
1359         }
1360
1361         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1362                                           crc, non_inherit);
1363
1364         /* Override with nontransmitted profile, if found */
1365         if (nontransmitted_profile_len)
1366                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1367                                             nontransmitted_profile_len,
1368                                             action, elems, 0, 0, NULL);
1369
1370         if (elems->tim && !elems->parse_error) {
1371                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1372
1373                 elems->dtim_period = tim_ie->dtim_period;
1374                 elems->dtim_count = tim_ie->dtim_count;
1375         }
1376
1377         /* Override DTIM period and count if needed */
1378         if (elems->bssid_index &&
1379             elems->bssid_index_len >=
1380             offsetofend(struct ieee80211_bssid_index, dtim_period))
1381                 elems->dtim_period = elems->bssid_index->dtim_period;
1382
1383         if (elems->bssid_index &&
1384             elems->bssid_index_len >=
1385             offsetofend(struct ieee80211_bssid_index, dtim_count))
1386                 elems->dtim_count = elems->bssid_index->dtim_count;
1387
1388         kfree(nontransmitted_profile);
1389
1390         return crc;
1391 }
1392
1393 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1394                                            struct ieee80211_tx_queue_params
1395                                            *qparam, int ac)
1396 {
1397         struct ieee80211_chanctx_conf *chanctx_conf;
1398         const struct ieee80211_reg_rule *rrule;
1399         const struct ieee80211_wmm_ac *wmm_ac;
1400         u16 center_freq = 0;
1401
1402         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1403             sdata->vif.type != NL80211_IFTYPE_STATION)
1404                 return;
1405
1406         rcu_read_lock();
1407         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1408         if (chanctx_conf)
1409                 center_freq = chanctx_conf->def.chan->center_freq;
1410
1411         if (!center_freq) {
1412                 rcu_read_unlock();
1413                 return;
1414         }
1415
1416         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1417
1418         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1419                 rcu_read_unlock();
1420                 return;
1421         }
1422
1423         if (sdata->vif.type == NL80211_IFTYPE_AP)
1424                 wmm_ac = &rrule->wmm_rule.ap[ac];
1425         else
1426                 wmm_ac = &rrule->wmm_rule.client[ac];
1427         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1428         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1429         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1430         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1431         rcu_read_unlock();
1432 }
1433
1434 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1435                                bool bss_notify, bool enable_qos)
1436 {
1437         struct ieee80211_local *local = sdata->local;
1438         struct ieee80211_tx_queue_params qparam;
1439         struct ieee80211_chanctx_conf *chanctx_conf;
1440         int ac;
1441         bool use_11b;
1442         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1443         int aCWmin, aCWmax;
1444
1445         if (!local->ops->conf_tx)
1446                 return;
1447
1448         if (local->hw.queues < IEEE80211_NUM_ACS)
1449                 return;
1450
1451         memset(&qparam, 0, sizeof(qparam));
1452
1453         rcu_read_lock();
1454         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1455         use_11b = (chanctx_conf &&
1456                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1457                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1458         rcu_read_unlock();
1459
1460         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1461
1462         /* Set defaults according to 802.11-2007 Table 7-37 */
1463         aCWmax = 1023;
1464         if (use_11b)
1465                 aCWmin = 31;
1466         else
1467                 aCWmin = 15;
1468
1469         /* Confiure old 802.11b/g medium access rules. */
1470         qparam.cw_max = aCWmax;
1471         qparam.cw_min = aCWmin;
1472         qparam.txop = 0;
1473         qparam.aifs = 2;
1474
1475         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1476                 /* Update if QoS is enabled. */
1477                 if (enable_qos) {
1478                         switch (ac) {
1479                         case IEEE80211_AC_BK:
1480                                 qparam.cw_max = aCWmax;
1481                                 qparam.cw_min = aCWmin;
1482                                 qparam.txop = 0;
1483                                 if (is_ocb)
1484                                         qparam.aifs = 9;
1485                                 else
1486                                         qparam.aifs = 7;
1487                                 break;
1488                         /* never happens but let's not leave undefined */
1489                         default:
1490                         case IEEE80211_AC_BE:
1491                                 qparam.cw_max = aCWmax;
1492                                 qparam.cw_min = aCWmin;
1493                                 qparam.txop = 0;
1494                                 if (is_ocb)
1495                                         qparam.aifs = 6;
1496                                 else
1497                                         qparam.aifs = 3;
1498                                 break;
1499                         case IEEE80211_AC_VI:
1500                                 qparam.cw_max = aCWmin;
1501                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1502                                 if (is_ocb)
1503                                         qparam.txop = 0;
1504                                 else if (use_11b)
1505                                         qparam.txop = 6016/32;
1506                                 else
1507                                         qparam.txop = 3008/32;
1508
1509                                 if (is_ocb)
1510                                         qparam.aifs = 3;
1511                                 else
1512                                         qparam.aifs = 2;
1513                                 break;
1514                         case IEEE80211_AC_VO:
1515                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1516                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1517                                 if (is_ocb)
1518                                         qparam.txop = 0;
1519                                 else if (use_11b)
1520                                         qparam.txop = 3264/32;
1521                                 else
1522                                         qparam.txop = 1504/32;
1523                                 qparam.aifs = 2;
1524                                 break;
1525                         }
1526                 }
1527                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1528
1529                 qparam.uapsd = false;
1530
1531                 sdata->tx_conf[ac] = qparam;
1532                 drv_conf_tx(local, sdata, ac, &qparam);
1533         }
1534
1535         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1536             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1537             sdata->vif.type != NL80211_IFTYPE_NAN) {
1538                 sdata->vif.bss_conf.qos = enable_qos;
1539                 if (bss_notify)
1540                         ieee80211_bss_info_change_notify(sdata,
1541                                                          BSS_CHANGED_QOS);
1542         }
1543 }
1544
1545 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1546                          u16 transaction, u16 auth_alg, u16 status,
1547                          const u8 *extra, size_t extra_len, const u8 *da,
1548                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1549                          u32 tx_flags)
1550 {
1551         struct ieee80211_local *local = sdata->local;
1552         struct sk_buff *skb;
1553         struct ieee80211_mgmt *mgmt;
1554         int err;
1555
1556         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1557         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1558                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1559         if (!skb)
1560                 return;
1561
1562         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1563
1564         mgmt = skb_put_zero(skb, 24 + 6);
1565         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1566                                           IEEE80211_STYPE_AUTH);
1567         memcpy(mgmt->da, da, ETH_ALEN);
1568         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1569         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1570         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1571         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1572         mgmt->u.auth.status_code = cpu_to_le16(status);
1573         if (extra)
1574                 skb_put_data(skb, extra, extra_len);
1575
1576         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1577                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1578                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1579                 WARN_ON(err);
1580         }
1581
1582         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1583                                         tx_flags;
1584         ieee80211_tx_skb(sdata, skb);
1585 }
1586
1587 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1588                                     const u8 *da, const u8 *bssid,
1589                                     u16 stype, u16 reason,
1590                                     bool send_frame, u8 *frame_buf)
1591 {
1592         struct ieee80211_local *local = sdata->local;
1593         struct sk_buff *skb;
1594         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1595
1596         /* build frame */
1597         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1598         mgmt->duration = 0; /* initialize only */
1599         mgmt->seq_ctrl = 0; /* initialize only */
1600         memcpy(mgmt->da, da, ETH_ALEN);
1601         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1602         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1603         /* u.deauth.reason_code == u.disassoc.reason_code */
1604         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1605
1606         if (send_frame) {
1607                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1608                                     IEEE80211_DEAUTH_FRAME_LEN);
1609                 if (!skb)
1610                         return;
1611
1612                 skb_reserve(skb, local->hw.extra_tx_headroom);
1613
1614                 /* copy in frame */
1615                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1616
1617                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1618                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1619                         IEEE80211_SKB_CB(skb)->flags |=
1620                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1621
1622                 ieee80211_tx_skb(sdata, skb);
1623         }
1624 }
1625
1626 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1627                                          u8 *buffer, size_t buffer_len,
1628                                          const u8 *ie, size_t ie_len,
1629                                          enum nl80211_band band,
1630                                          u32 rate_mask,
1631                                          struct cfg80211_chan_def *chandef,
1632                                          size_t *offset, u32 flags)
1633 {
1634         struct ieee80211_supported_band *sband;
1635         const struct ieee80211_sta_he_cap *he_cap;
1636         u8 *pos = buffer, *end = buffer + buffer_len;
1637         size_t noffset;
1638         int supp_rates_len, i;
1639         u8 rates[32];
1640         int num_rates;
1641         int ext_rates_len;
1642         int shift;
1643         u32 rate_flags;
1644         bool have_80mhz = false;
1645
1646         *offset = 0;
1647
1648         sband = local->hw.wiphy->bands[band];
1649         if (WARN_ON_ONCE(!sband))
1650                 return 0;
1651
1652         rate_flags = ieee80211_chandef_rate_flags(chandef);
1653         shift = ieee80211_chandef_get_shift(chandef);
1654
1655         num_rates = 0;
1656         for (i = 0; i < sband->n_bitrates; i++) {
1657                 if ((BIT(i) & rate_mask) == 0)
1658                         continue; /* skip rate */
1659                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1660                         continue;
1661
1662                 rates[num_rates++] =
1663                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1664                                           (1 << shift) * 5);
1665         }
1666
1667         supp_rates_len = min_t(int, num_rates, 8);
1668
1669         if (end - pos < 2 + supp_rates_len)
1670                 goto out_err;
1671         *pos++ = WLAN_EID_SUPP_RATES;
1672         *pos++ = supp_rates_len;
1673         memcpy(pos, rates, supp_rates_len);
1674         pos += supp_rates_len;
1675
1676         /* insert "request information" if in custom IEs */
1677         if (ie && ie_len) {
1678                 static const u8 before_extrates[] = {
1679                         WLAN_EID_SSID,
1680                         WLAN_EID_SUPP_RATES,
1681                         WLAN_EID_REQUEST,
1682                 };
1683                 noffset = ieee80211_ie_split(ie, ie_len,
1684                                              before_extrates,
1685                                              ARRAY_SIZE(before_extrates),
1686                                              *offset);
1687                 if (end - pos < noffset - *offset)
1688                         goto out_err;
1689                 memcpy(pos, ie + *offset, noffset - *offset);
1690                 pos += noffset - *offset;
1691                 *offset = noffset;
1692         }
1693
1694         ext_rates_len = num_rates - supp_rates_len;
1695         if (ext_rates_len > 0) {
1696                 if (end - pos < 2 + ext_rates_len)
1697                         goto out_err;
1698                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1699                 *pos++ = ext_rates_len;
1700                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1701                 pos += ext_rates_len;
1702         }
1703
1704         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1705                 if (end - pos < 3)
1706                         goto out_err;
1707                 *pos++ = WLAN_EID_DS_PARAMS;
1708                 *pos++ = 1;
1709                 *pos++ = ieee80211_frequency_to_channel(
1710                                 chandef->chan->center_freq);
1711         }
1712
1713         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1714                 goto done;
1715
1716         /* insert custom IEs that go before HT */
1717         if (ie && ie_len) {
1718                 static const u8 before_ht[] = {
1719                         /*
1720                          * no need to list the ones split off already
1721                          * (or generated here)
1722                          */
1723                         WLAN_EID_DS_PARAMS,
1724                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1725                 };
1726                 noffset = ieee80211_ie_split(ie, ie_len,
1727                                              before_ht, ARRAY_SIZE(before_ht),
1728                                              *offset);
1729                 if (end - pos < noffset - *offset)
1730                         goto out_err;
1731                 memcpy(pos, ie + *offset, noffset - *offset);
1732                 pos += noffset - *offset;
1733                 *offset = noffset;
1734         }
1735
1736         if (sband->ht_cap.ht_supported) {
1737                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1738                         goto out_err;
1739                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1740                                                 sband->ht_cap.cap);
1741         }
1742
1743         /* insert custom IEs that go before VHT */
1744         if (ie && ie_len) {
1745                 static const u8 before_vht[] = {
1746                         /*
1747                          * no need to list the ones split off already
1748                          * (or generated here)
1749                          */
1750                         WLAN_EID_BSS_COEX_2040,
1751                         WLAN_EID_EXT_CAPABILITY,
1752                         WLAN_EID_SSID_LIST,
1753                         WLAN_EID_CHANNEL_USAGE,
1754                         WLAN_EID_INTERWORKING,
1755                         WLAN_EID_MESH_ID,
1756                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1757                 };
1758                 noffset = ieee80211_ie_split(ie, ie_len,
1759                                              before_vht, ARRAY_SIZE(before_vht),
1760                                              *offset);
1761                 if (end - pos < noffset - *offset)
1762                         goto out_err;
1763                 memcpy(pos, ie + *offset, noffset - *offset);
1764                 pos += noffset - *offset;
1765                 *offset = noffset;
1766         }
1767
1768         /* Check if any channel in this sband supports at least 80 MHz */
1769         for (i = 0; i < sband->n_channels; i++) {
1770                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1771                                                 IEEE80211_CHAN_NO_80MHZ))
1772                         continue;
1773
1774                 have_80mhz = true;
1775                 break;
1776         }
1777
1778         if (sband->vht_cap.vht_supported && have_80mhz) {
1779                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1780                         goto out_err;
1781                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1782                                                  sband->vht_cap.cap);
1783         }
1784
1785         /* insert custom IEs that go before HE */
1786         if (ie && ie_len) {
1787                 static const u8 before_he[] = {
1788                         /*
1789                          * no need to list the ones split off before VHT
1790                          * or generated here
1791                          */
1792                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1793                         WLAN_EID_AP_CSN,
1794                         /* TODO: add 11ah/11aj/11ak elements */
1795                 };
1796                 noffset = ieee80211_ie_split(ie, ie_len,
1797                                              before_he, ARRAY_SIZE(before_he),
1798                                              *offset);
1799                 if (end - pos < noffset - *offset)
1800                         goto out_err;
1801                 memcpy(pos, ie + *offset, noffset - *offset);
1802                 pos += noffset - *offset;
1803                 *offset = noffset;
1804         }
1805
1806         he_cap = ieee80211_get_he_sta_cap(sband);
1807         if (he_cap) {
1808                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1809                 if (!pos)
1810                         goto out_err;
1811         }
1812
1813         /*
1814          * If adding more here, adjust code in main.c
1815          * that calculates local->scan_ies_len.
1816          */
1817
1818         return pos - buffer;
1819  out_err:
1820         WARN_ONCE(1, "not enough space for preq IEs\n");
1821  done:
1822         return pos - buffer;
1823 }
1824
1825 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1826                              size_t buffer_len,
1827                              struct ieee80211_scan_ies *ie_desc,
1828                              const u8 *ie, size_t ie_len,
1829                              u8 bands_used, u32 *rate_masks,
1830                              struct cfg80211_chan_def *chandef,
1831                              u32 flags)
1832 {
1833         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1834         int i;
1835
1836         memset(ie_desc, 0, sizeof(*ie_desc));
1837
1838         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1839                 if (bands_used & BIT(i)) {
1840                         pos += ieee80211_build_preq_ies_band(local,
1841                                                              buffer + pos,
1842                                                              buffer_len - pos,
1843                                                              ie, ie_len, i,
1844                                                              rate_masks[i],
1845                                                              chandef,
1846                                                              &custom_ie_offset,
1847                                                              flags);
1848                         ie_desc->ies[i] = buffer + old_pos;
1849                         ie_desc->len[i] = pos - old_pos;
1850                         old_pos = pos;
1851                 }
1852         }
1853
1854         /* add any remaining custom IEs */
1855         if (ie && ie_len) {
1856                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1857                               "not enough space for preq custom IEs\n"))
1858                         return pos;
1859                 memcpy(buffer + pos, ie + custom_ie_offset,
1860                        ie_len - custom_ie_offset);
1861                 ie_desc->common_ies = buffer + pos;
1862                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1863                 pos += ie_len - custom_ie_offset;
1864         }
1865
1866         return pos;
1867 };
1868
1869 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1870                                           const u8 *src, const u8 *dst,
1871                                           u32 ratemask,
1872                                           struct ieee80211_channel *chan,
1873                                           const u8 *ssid, size_t ssid_len,
1874                                           const u8 *ie, size_t ie_len,
1875                                           u32 flags)
1876 {
1877         struct ieee80211_local *local = sdata->local;
1878         struct cfg80211_chan_def chandef;
1879         struct sk_buff *skb;
1880         struct ieee80211_mgmt *mgmt;
1881         int ies_len;
1882         u32 rate_masks[NUM_NL80211_BANDS] = {};
1883         struct ieee80211_scan_ies dummy_ie_desc;
1884
1885         /*
1886          * Do not send DS Channel parameter for directed probe requests
1887          * in order to maximize the chance that we get a response.  Some
1888          * badly-behaved APs don't respond when this parameter is included.
1889          */
1890         chandef.width = sdata->vif.bss_conf.chandef.width;
1891         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1892                 chandef.chan = NULL;
1893         else
1894                 chandef.chan = chan;
1895
1896         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1897                                      100 + ie_len);
1898         if (!skb)
1899                 return NULL;
1900
1901         rate_masks[chan->band] = ratemask;
1902         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1903                                            skb_tailroom(skb), &dummy_ie_desc,
1904                                            ie, ie_len, BIT(chan->band),
1905                                            rate_masks, &chandef, flags);
1906         skb_put(skb, ies_len);
1907
1908         if (dst) {
1909                 mgmt = (struct ieee80211_mgmt *) skb->data;
1910                 memcpy(mgmt->da, dst, ETH_ALEN);
1911                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1912         }
1913
1914         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1915
1916         return skb;
1917 }
1918
1919 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1920                             struct ieee802_11_elems *elems,
1921                             enum nl80211_band band, u32 *basic_rates)
1922 {
1923         struct ieee80211_supported_band *sband;
1924         size_t num_rates;
1925         u32 supp_rates, rate_flags;
1926         int i, j, shift;
1927
1928         sband = sdata->local->hw.wiphy->bands[band];
1929         if (WARN_ON(!sband))
1930                 return 1;
1931
1932         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1933         shift = ieee80211_vif_get_shift(&sdata->vif);
1934
1935         num_rates = sband->n_bitrates;
1936         supp_rates = 0;
1937         for (i = 0; i < elems->supp_rates_len +
1938                      elems->ext_supp_rates_len; i++) {
1939                 u8 rate = 0;
1940                 int own_rate;
1941                 bool is_basic;
1942                 if (i < elems->supp_rates_len)
1943                         rate = elems->supp_rates[i];
1944                 else if (elems->ext_supp_rates)
1945                         rate = elems->ext_supp_rates
1946                                 [i - elems->supp_rates_len];
1947                 own_rate = 5 * (rate & 0x7f);
1948                 is_basic = !!(rate & 0x80);
1949
1950                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1951                         continue;
1952
1953                 for (j = 0; j < num_rates; j++) {
1954                         int brate;
1955                         if ((rate_flags & sband->bitrates[j].flags)
1956                             != rate_flags)
1957                                 continue;
1958
1959                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1960                                              1 << shift);
1961
1962                         if (brate == own_rate) {
1963                                 supp_rates |= BIT(j);
1964                                 if (basic_rates && is_basic)
1965                                         *basic_rates |= BIT(j);
1966                         }
1967                 }
1968         }
1969         return supp_rates;
1970 }
1971
1972 void ieee80211_stop_device(struct ieee80211_local *local)
1973 {
1974         ieee80211_led_radio(local, false);
1975         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1976
1977         cancel_work_sync(&local->reconfig_filter);
1978
1979         flush_workqueue(local->workqueue);
1980         drv_stop(local);
1981 }
1982
1983 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1984                                            bool aborted)
1985 {
1986         /* It's possible that we don't handle the scan completion in
1987          * time during suspend, so if it's still marked as completed
1988          * here, queue the work and flush it to clean things up.
1989          * Instead of calling the worker function directly here, we
1990          * really queue it to avoid potential races with other flows
1991          * scheduling the same work.
1992          */
1993         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1994                 /* If coming from reconfiguration failure, abort the scan so
1995                  * we don't attempt to continue a partial HW scan - which is
1996                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1997                  * completed scan, and a 5 GHz portion is still pending.
1998                  */
1999                 if (aborted)
2000                         set_bit(SCAN_ABORTED, &local->scanning);
2001                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2002                 flush_delayed_work(&local->scan_work);
2003         }
2004 }
2005
2006 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2007 {
2008         struct ieee80211_sub_if_data *sdata;
2009         struct ieee80211_chanctx *ctx;
2010
2011         /*
2012          * We get here if during resume the device can't be restarted properly.
2013          * We might also get here if this happens during HW reset, which is a
2014          * slightly different situation and we need to drop all connections in
2015          * the latter case.
2016          *
2017          * Ask cfg80211 to turn off all interfaces, this will result in more
2018          * warnings but at least we'll then get into a clean stopped state.
2019          */
2020
2021         local->resuming = false;
2022         local->suspended = false;
2023         local->in_reconfig = false;
2024
2025         ieee80211_flush_completed_scan(local, true);
2026
2027         /* scheduled scan clearly can't be running any more, but tell
2028          * cfg80211 and clear local state
2029          */
2030         ieee80211_sched_scan_end(local);
2031
2032         list_for_each_entry(sdata, &local->interfaces, list)
2033                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2034
2035         /* Mark channel contexts as not being in the driver any more to avoid
2036          * removing them from the driver during the shutdown process...
2037          */
2038         mutex_lock(&local->chanctx_mtx);
2039         list_for_each_entry(ctx, &local->chanctx_list, list)
2040                 ctx->driver_present = false;
2041         mutex_unlock(&local->chanctx_mtx);
2042
2043         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2044 }
2045
2046 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2047                                      struct ieee80211_sub_if_data *sdata)
2048 {
2049         struct ieee80211_chanctx_conf *conf;
2050         struct ieee80211_chanctx *ctx;
2051
2052         if (!local->use_chanctx)
2053                 return;
2054
2055         mutex_lock(&local->chanctx_mtx);
2056         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2057                                          lockdep_is_held(&local->chanctx_mtx));
2058         if (conf) {
2059                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2060                 drv_assign_vif_chanctx(local, sdata, ctx);
2061         }
2062         mutex_unlock(&local->chanctx_mtx);
2063 }
2064
2065 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2066 {
2067         struct ieee80211_local *local = sdata->local;
2068         struct sta_info *sta;
2069
2070         /* add STAs back */
2071         mutex_lock(&local->sta_mtx);
2072         list_for_each_entry(sta, &local->sta_list, list) {
2073                 enum ieee80211_sta_state state;
2074
2075                 if (!sta->uploaded || sta->sdata != sdata)
2076                         continue;
2077
2078                 for (state = IEEE80211_STA_NOTEXIST;
2079                      state < sta->sta_state; state++)
2080                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2081                                               state + 1));
2082         }
2083         mutex_unlock(&local->sta_mtx);
2084 }
2085
2086 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2087 {
2088         struct cfg80211_nan_func *func, **funcs;
2089         int res, id, i = 0;
2090
2091         res = drv_start_nan(sdata->local, sdata,
2092                             &sdata->u.nan.conf);
2093         if (WARN_ON(res))
2094                 return res;
2095
2096         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2097                         sizeof(*funcs),
2098                         GFP_KERNEL);
2099         if (!funcs)
2100                 return -ENOMEM;
2101
2102         /* Add all the functions:
2103          * This is a little bit ugly. We need to call a potentially sleeping
2104          * callback for each NAN function, so we can't hold the spinlock.
2105          */
2106         spin_lock_bh(&sdata->u.nan.func_lock);
2107
2108         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2109                 funcs[i++] = func;
2110
2111         spin_unlock_bh(&sdata->u.nan.func_lock);
2112
2113         for (i = 0; funcs[i]; i++) {
2114                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2115                 if (WARN_ON(res))
2116                         ieee80211_nan_func_terminated(&sdata->vif,
2117                                                       funcs[i]->instance_id,
2118                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2119                                                       GFP_KERNEL);
2120         }
2121
2122         kfree(funcs);
2123
2124         return 0;
2125 }
2126
2127 int ieee80211_reconfig(struct ieee80211_local *local)
2128 {
2129         struct ieee80211_hw *hw = &local->hw;
2130         struct ieee80211_sub_if_data *sdata;
2131         struct ieee80211_chanctx *ctx;
2132         struct sta_info *sta;
2133         int res, i;
2134         bool reconfig_due_to_wowlan = false;
2135         struct ieee80211_sub_if_data *sched_scan_sdata;
2136         struct cfg80211_sched_scan_request *sched_scan_req;
2137         bool sched_scan_stopped = false;
2138         bool suspended = local->suspended;
2139
2140         /* nothing to do if HW shouldn't run */
2141         if (!local->open_count)
2142                 goto wake_up;
2143
2144 #ifdef CONFIG_PM
2145         if (suspended)
2146                 local->resuming = true;
2147
2148         if (local->wowlan) {
2149                 /*
2150                  * In the wowlan case, both mac80211 and the device
2151                  * are functional when the resume op is called, so
2152                  * clear local->suspended so the device could operate
2153                  * normally (e.g. pass rx frames).
2154                  */
2155                 local->suspended = false;
2156                 res = drv_resume(local);
2157                 local->wowlan = false;
2158                 if (res < 0) {
2159                         local->resuming = false;
2160                         return res;
2161                 }
2162                 if (res == 0)
2163                         goto wake_up;
2164                 WARN_ON(res > 1);
2165                 /*
2166                  * res is 1, which means the driver requested
2167                  * to go through a regular reset on wakeup.
2168                  * restore local->suspended in this case.
2169                  */
2170                 reconfig_due_to_wowlan = true;
2171                 local->suspended = true;
2172         }
2173 #endif
2174
2175         /*
2176          * In case of hw_restart during suspend (without wowlan),
2177          * cancel restart work, as we are reconfiguring the device
2178          * anyway.
2179          * Note that restart_work is scheduled on a frozen workqueue,
2180          * so we can't deadlock in this case.
2181          */
2182         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2183                 cancel_work_sync(&local->restart_work);
2184
2185         local->started = false;
2186
2187         /*
2188          * Upon resume hardware can sometimes be goofy due to
2189          * various platform / driver / bus issues, so restarting
2190          * the device may at times not work immediately. Propagate
2191          * the error.
2192          */
2193         res = drv_start(local);
2194         if (res) {
2195                 if (suspended)
2196                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2197                 else
2198                         WARN(1, "Hardware became unavailable during restart.\n");
2199                 ieee80211_handle_reconfig_failure(local);
2200                 return res;
2201         }
2202
2203         /* setup fragmentation threshold */
2204         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2205
2206         /* setup RTS threshold */
2207         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2208
2209         /* reset coverage class */
2210         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2211
2212         ieee80211_led_radio(local, true);
2213         ieee80211_mod_tpt_led_trig(local,
2214                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2215
2216         /* add interfaces */
2217         sdata = rtnl_dereference(local->monitor_sdata);
2218         if (sdata) {
2219                 /* in HW restart it exists already */
2220                 WARN_ON(local->resuming);
2221                 res = drv_add_interface(local, sdata);
2222                 if (WARN_ON(res)) {
2223                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2224                         synchronize_net();
2225                         kfree(sdata);
2226                 }
2227         }
2228
2229         list_for_each_entry(sdata, &local->interfaces, list) {
2230                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2231                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2232                     ieee80211_sdata_running(sdata)) {
2233                         res = drv_add_interface(local, sdata);
2234                         if (WARN_ON(res))
2235                                 break;
2236                 }
2237         }
2238
2239         /* If adding any of the interfaces failed above, roll back and
2240          * report failure.
2241          */
2242         if (res) {
2243                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2244                                                      list)
2245                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2246                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2247                             ieee80211_sdata_running(sdata))
2248                                 drv_remove_interface(local, sdata);
2249                 ieee80211_handle_reconfig_failure(local);
2250                 return res;
2251         }
2252
2253         /* add channel contexts */
2254         if (local->use_chanctx) {
2255                 mutex_lock(&local->chanctx_mtx);
2256                 list_for_each_entry(ctx, &local->chanctx_list, list)
2257                         if (ctx->replace_state !=
2258                             IEEE80211_CHANCTX_REPLACES_OTHER)
2259                                 WARN_ON(drv_add_chanctx(local, ctx));
2260                 mutex_unlock(&local->chanctx_mtx);
2261
2262                 sdata = rtnl_dereference(local->monitor_sdata);
2263                 if (sdata && ieee80211_sdata_running(sdata))
2264                         ieee80211_assign_chanctx(local, sdata);
2265         }
2266
2267         /* reconfigure hardware */
2268         ieee80211_hw_config(local, ~0);
2269
2270         ieee80211_configure_filter(local);
2271
2272         /* Finally also reconfigure all the BSS information */
2273         list_for_each_entry(sdata, &local->interfaces, list) {
2274                 u32 changed;
2275
2276                 if (!ieee80211_sdata_running(sdata))
2277                         continue;
2278
2279                 ieee80211_assign_chanctx(local, sdata);
2280
2281                 switch (sdata->vif.type) {
2282                 case NL80211_IFTYPE_AP_VLAN:
2283                 case NL80211_IFTYPE_MONITOR:
2284                         break;
2285                 case NL80211_IFTYPE_ADHOC:
2286                         if (sdata->vif.bss_conf.ibss_joined)
2287                                 WARN_ON(drv_join_ibss(local, sdata));
2288                         /* fall through */
2289                 default:
2290                         ieee80211_reconfig_stations(sdata);
2291                         /* fall through */
2292                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2293                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2294                                 drv_conf_tx(local, sdata, i,
2295                                             &sdata->tx_conf[i]);
2296                         break;
2297                 }
2298
2299                 /* common change flags for all interface types */
2300                 changed = BSS_CHANGED_ERP_CTS_PROT |
2301                           BSS_CHANGED_ERP_PREAMBLE |
2302                           BSS_CHANGED_ERP_SLOT |
2303                           BSS_CHANGED_HT |
2304                           BSS_CHANGED_BASIC_RATES |
2305                           BSS_CHANGED_BEACON_INT |
2306                           BSS_CHANGED_BSSID |
2307                           BSS_CHANGED_CQM |
2308                           BSS_CHANGED_QOS |
2309                           BSS_CHANGED_IDLE |
2310                           BSS_CHANGED_TXPOWER |
2311                           BSS_CHANGED_MCAST_RATE;
2312
2313                 if (sdata->vif.mu_mimo_owner)
2314                         changed |= BSS_CHANGED_MU_GROUPS;
2315
2316                 switch (sdata->vif.type) {
2317                 case NL80211_IFTYPE_STATION:
2318                         changed |= BSS_CHANGED_ASSOC |
2319                                    BSS_CHANGED_ARP_FILTER |
2320                                    BSS_CHANGED_PS;
2321
2322                         /* Re-send beacon info report to the driver */
2323                         if (sdata->u.mgd.have_beacon)
2324                                 changed |= BSS_CHANGED_BEACON_INFO;
2325
2326                         if (sdata->vif.bss_conf.max_idle_period ||
2327                             sdata->vif.bss_conf.protected_keep_alive)
2328                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2329
2330                         sdata_lock(sdata);
2331                         ieee80211_bss_info_change_notify(sdata, changed);
2332                         sdata_unlock(sdata);
2333                         break;
2334                 case NL80211_IFTYPE_OCB:
2335                         changed |= BSS_CHANGED_OCB;
2336                         ieee80211_bss_info_change_notify(sdata, changed);
2337                         break;
2338                 case NL80211_IFTYPE_ADHOC:
2339                         changed |= BSS_CHANGED_IBSS;
2340                         /* fall through */
2341                 case NL80211_IFTYPE_AP:
2342                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2343
2344                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2345                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2346                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2347                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2348
2349                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2350                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2351
2352                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2353                                         drv_start_ap(local, sdata);
2354                         }
2355
2356                         /* fall through */
2357                 case NL80211_IFTYPE_MESH_POINT:
2358                         if (sdata->vif.bss_conf.enable_beacon) {
2359                                 changed |= BSS_CHANGED_BEACON |
2360                                            BSS_CHANGED_BEACON_ENABLED;
2361                                 ieee80211_bss_info_change_notify(sdata, changed);
2362                         }
2363                         break;
2364                 case NL80211_IFTYPE_NAN:
2365                         res = ieee80211_reconfig_nan(sdata);
2366                         if (res < 0) {
2367                                 ieee80211_handle_reconfig_failure(local);
2368                                 return res;
2369                         }
2370                         break;
2371                 case NL80211_IFTYPE_WDS:
2372                 case NL80211_IFTYPE_AP_VLAN:
2373                 case NL80211_IFTYPE_MONITOR:
2374                 case NL80211_IFTYPE_P2P_DEVICE:
2375                         /* nothing to do */
2376                         break;
2377                 case NL80211_IFTYPE_UNSPECIFIED:
2378                 case NUM_NL80211_IFTYPES:
2379                 case NL80211_IFTYPE_P2P_CLIENT:
2380                 case NL80211_IFTYPE_P2P_GO:
2381                         WARN_ON(1);
2382                         break;
2383                 }
2384         }
2385
2386         ieee80211_recalc_ps(local);
2387
2388         /*
2389          * The sta might be in psm against the ap (e.g. because
2390          * this was the state before a hw restart), so we
2391          * explicitly send a null packet in order to make sure
2392          * it'll sync against the ap (and get out of psm).
2393          */
2394         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2395                 list_for_each_entry(sdata, &local->interfaces, list) {
2396                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2397                                 continue;
2398                         if (!sdata->u.mgd.associated)
2399                                 continue;
2400
2401                         ieee80211_send_nullfunc(local, sdata, false);
2402                 }
2403         }
2404
2405         /* APs are now beaconing, add back stations */
2406         mutex_lock(&local->sta_mtx);
2407         list_for_each_entry(sta, &local->sta_list, list) {
2408                 enum ieee80211_sta_state state;
2409
2410                 if (!sta->uploaded)
2411                         continue;
2412
2413                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2414                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2415                         continue;
2416
2417                 for (state = IEEE80211_STA_NOTEXIST;
2418                      state < sta->sta_state; state++)
2419                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2420                                               state + 1));
2421         }
2422         mutex_unlock(&local->sta_mtx);
2423
2424         /* add back keys */
2425         list_for_each_entry(sdata, &local->interfaces, list)
2426                 ieee80211_reenable_keys(sdata);
2427
2428         /* Reconfigure sched scan if it was interrupted by FW restart */
2429         mutex_lock(&local->mtx);
2430         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2431                                                 lockdep_is_held(&local->mtx));
2432         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2433                                                 lockdep_is_held(&local->mtx));
2434         if (sched_scan_sdata && sched_scan_req)
2435                 /*
2436                  * Sched scan stopped, but we don't want to report it. Instead,
2437                  * we're trying to reschedule. However, if more than one scan
2438                  * plan was set, we cannot reschedule since we don't know which
2439                  * scan plan was currently running (and some scan plans may have
2440                  * already finished).
2441                  */
2442                 if (sched_scan_req->n_scan_plans > 1 ||
2443                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2444                                                          sched_scan_req)) {
2445                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2446                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2447                         sched_scan_stopped = true;
2448                 }
2449         mutex_unlock(&local->mtx);
2450
2451         if (sched_scan_stopped)
2452                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2453
2454  wake_up:
2455
2456         if (local->monitors == local->open_count && local->monitors > 0)
2457                 ieee80211_add_virtual_monitor(local);
2458
2459         /*
2460          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2461          * sessions can be established after a resume.
2462          *
2463          * Also tear down aggregation sessions since reconfiguring
2464          * them in a hardware restart scenario is not easily done
2465          * right now, and the hardware will have lost information
2466          * about the sessions, but we and the AP still think they
2467          * are active. This is really a workaround though.
2468          */
2469         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2470                 mutex_lock(&local->sta_mtx);
2471
2472                 list_for_each_entry(sta, &local->sta_list, list) {
2473                         if (!local->resuming)
2474                                 ieee80211_sta_tear_down_BA_sessions(
2475                                                 sta, AGG_STOP_LOCAL_REQUEST);
2476                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2477                 }
2478
2479                 mutex_unlock(&local->sta_mtx);
2480         }
2481
2482         if (local->in_reconfig) {
2483                 local->in_reconfig = false;
2484                 barrier();
2485
2486                 /* Restart deferred ROCs */
2487                 mutex_lock(&local->mtx);
2488                 ieee80211_start_next_roc(local);
2489                 mutex_unlock(&local->mtx);
2490
2491                 /* Requeue all works */
2492                 list_for_each_entry(sdata, &local->interfaces, list)
2493                         ieee80211_queue_work(&local->hw, &sdata->work);
2494         }
2495
2496         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2497                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2498                                         false);
2499
2500         /*
2501          * If this is for hw restart things are still running.
2502          * We may want to change that later, however.
2503          */
2504         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2505                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2506
2507         if (!suspended)
2508                 return 0;
2509
2510 #ifdef CONFIG_PM
2511         /* first set suspended false, then resuming */
2512         local->suspended = false;
2513         mb();
2514         local->resuming = false;
2515
2516         ieee80211_flush_completed_scan(local, false);
2517
2518         if (local->open_count && !reconfig_due_to_wowlan)
2519                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2520
2521         list_for_each_entry(sdata, &local->interfaces, list) {
2522                 if (!ieee80211_sdata_running(sdata))
2523                         continue;
2524                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2525                         ieee80211_sta_restart(sdata);
2526         }
2527
2528         mod_timer(&local->sta_cleanup, jiffies + 1);
2529 #else
2530         WARN_ON(1);
2531 #endif
2532
2533         return 0;
2534 }
2535
2536 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2537 {
2538         struct ieee80211_sub_if_data *sdata;
2539         struct ieee80211_local *local;
2540         struct ieee80211_key *key;
2541
2542         if (WARN_ON(!vif))
2543                 return;
2544
2545         sdata = vif_to_sdata(vif);
2546         local = sdata->local;
2547
2548         if (WARN_ON(!local->resuming))
2549                 return;
2550
2551         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2552                 return;
2553
2554         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2555
2556         mutex_lock(&local->key_mtx);
2557         list_for_each_entry(key, &sdata->key_list, list)
2558                 key->flags |= KEY_FLAG_TAINTED;
2559         mutex_unlock(&local->key_mtx);
2560 }
2561 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2562
2563 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2564 {
2565         struct ieee80211_local *local = sdata->local;
2566         struct ieee80211_chanctx_conf *chanctx_conf;
2567         struct ieee80211_chanctx *chanctx;
2568
2569         mutex_lock(&local->chanctx_mtx);
2570
2571         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2572                                         lockdep_is_held(&local->chanctx_mtx));
2573
2574         /*
2575          * This function can be called from a work, thus it may be possible
2576          * that the chanctx_conf is removed (due to a disconnection, for
2577          * example).
2578          * So nothing should be done in such case.
2579          */
2580         if (!chanctx_conf)
2581                 goto unlock;
2582
2583         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2584         ieee80211_recalc_smps_chanctx(local, chanctx);
2585  unlock:
2586         mutex_unlock(&local->chanctx_mtx);
2587 }
2588
2589 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2590 {
2591         struct ieee80211_local *local = sdata->local;
2592         struct ieee80211_chanctx_conf *chanctx_conf;
2593         struct ieee80211_chanctx *chanctx;
2594
2595         mutex_lock(&local->chanctx_mtx);
2596
2597         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2598                                         lockdep_is_held(&local->chanctx_mtx));
2599
2600         if (WARN_ON_ONCE(!chanctx_conf))
2601                 goto unlock;
2602
2603         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2604         ieee80211_recalc_chanctx_min_def(local, chanctx);
2605  unlock:
2606         mutex_unlock(&local->chanctx_mtx);
2607 }
2608
2609 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2610 {
2611         size_t pos = offset;
2612
2613         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2614                 pos += 2 + ies[pos + 1];
2615
2616         return pos;
2617 }
2618
2619 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2620                                             int rssi_min_thold,
2621                                             int rssi_max_thold)
2622 {
2623         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2624
2625         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2626                 return;
2627
2628         /*
2629          * Scale up threshold values before storing it, as the RSSI averaging
2630          * algorithm uses a scaled up value as well. Change this scaling
2631          * factor if the RSSI averaging algorithm changes.
2632          */
2633         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2634         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2635 }
2636
2637 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2638                                     int rssi_min_thold,
2639                                     int rssi_max_thold)
2640 {
2641         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2642
2643         WARN_ON(rssi_min_thold == rssi_max_thold ||
2644                 rssi_min_thold > rssi_max_thold);
2645
2646         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2647                                        rssi_max_thold);
2648 }
2649 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2650
2651 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2652 {
2653         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2654
2655         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2656 }
2657 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2658
2659 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2660                               u16 cap)
2661 {
2662         __le16 tmp;
2663
2664         *pos++ = WLAN_EID_HT_CAPABILITY;
2665         *pos++ = sizeof(struct ieee80211_ht_cap);
2666         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2667
2668         /* capability flags */
2669         tmp = cpu_to_le16(cap);
2670         memcpy(pos, &tmp, sizeof(u16));
2671         pos += sizeof(u16);
2672
2673         /* AMPDU parameters */
2674         *pos++ = ht_cap->ampdu_factor |
2675                  (ht_cap->ampdu_density <<
2676                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2677
2678         /* MCS set */
2679         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2680         pos += sizeof(ht_cap->mcs);
2681
2682         /* extended capabilities */
2683         pos += sizeof(__le16);
2684
2685         /* BF capabilities */
2686         pos += sizeof(__le32);
2687
2688         /* antenna selection */
2689         pos += sizeof(u8);
2690
2691         return pos;
2692 }
2693
2694 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2695                                u32 cap)
2696 {
2697         __le32 tmp;
2698
2699         *pos++ = WLAN_EID_VHT_CAPABILITY;
2700         *pos++ = sizeof(struct ieee80211_vht_cap);
2701         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2702
2703         /* capability flags */
2704         tmp = cpu_to_le32(cap);
2705         memcpy(pos, &tmp, sizeof(u32));
2706         pos += sizeof(u32);
2707
2708         /* VHT MCS set */
2709         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2710         pos += sizeof(vht_cap->vht_mcs);
2711
2712         return pos;
2713 }
2714
2715 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2716 {
2717         const struct ieee80211_sta_he_cap *he_cap;
2718         struct ieee80211_supported_band *sband;
2719         u8 n;
2720
2721         sband = ieee80211_get_sband(sdata);
2722         if (!sband)
2723                 return 0;
2724
2725         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2726         if (!he_cap)
2727                 return 0;
2728
2729         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2730         return 2 + 1 +
2731                sizeof(he_cap->he_cap_elem) + n +
2732                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2733                                      he_cap->he_cap_elem.phy_cap_info);
2734 }
2735
2736 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2737                               const struct ieee80211_sta_he_cap *he_cap,
2738                               u8 *end)
2739 {
2740         u8 n;
2741         u8 ie_len;
2742         u8 *orig_pos = pos;
2743
2744         /* Make sure we have place for the IE */
2745         /*
2746          * TODO: the 1 added is because this temporarily is under the EXTENSION
2747          * IE. Get rid of it when it moves.
2748          */
2749         if (!he_cap)
2750                 return orig_pos;
2751
2752         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2753         ie_len = 2 + 1 +
2754                  sizeof(he_cap->he_cap_elem) + n +
2755                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2756                                        he_cap->he_cap_elem.phy_cap_info);
2757
2758         if ((end - pos) < ie_len)
2759                 return orig_pos;
2760
2761         *pos++ = WLAN_EID_EXTENSION;
2762         pos++; /* We'll set the size later below */
2763         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2764
2765         /* Fixed data */
2766         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2767         pos += sizeof(he_cap->he_cap_elem);
2768
2769         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2770         pos += n;
2771
2772         /* Check if PPE Threshold should be present */
2773         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2774              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2775                 goto end;
2776
2777         /*
2778          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2779          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2780          */
2781         n = hweight8(he_cap->ppe_thres[0] &
2782                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2783         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2784                    IEEE80211_PPE_THRES_NSS_POS));
2785
2786         /*
2787          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2788          * total size.
2789          */
2790         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2791         n = DIV_ROUND_UP(n, 8);
2792
2793         /* Copy PPE Thresholds */
2794         memcpy(pos, &he_cap->ppe_thres, n);
2795         pos += n;
2796
2797 end:
2798         orig_pos[1] = (pos - orig_pos) - 2;
2799         return pos;
2800 }
2801
2802 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2803                                const struct cfg80211_chan_def *chandef,
2804                                u16 prot_mode, bool rifs_mode)
2805 {
2806         struct ieee80211_ht_operation *ht_oper;
2807         /* Build HT Information */
2808         *pos++ = WLAN_EID_HT_OPERATION;
2809         *pos++ = sizeof(struct ieee80211_ht_operation);
2810         ht_oper = (struct ieee80211_ht_operation *)pos;
2811         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2812                                         chandef->chan->center_freq);
2813         switch (chandef->width) {
2814         case NL80211_CHAN_WIDTH_160:
2815         case NL80211_CHAN_WIDTH_80P80:
2816         case NL80211_CHAN_WIDTH_80:
2817         case NL80211_CHAN_WIDTH_40:
2818                 if (chandef->center_freq1 > chandef->chan->center_freq)
2819                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2820                 else
2821                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2822                 break;
2823         default:
2824                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2825                 break;
2826         }
2827         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2828             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2829             chandef->width != NL80211_CHAN_WIDTH_20)
2830                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2831
2832         if (rifs_mode)
2833                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2834
2835         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2836         ht_oper->stbc_param = 0x0000;
2837
2838         /* It seems that Basic MCS set and Supported MCS set
2839            are identical for the first 10 bytes */
2840         memset(&ht_oper->basic_set, 0, 16);
2841         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2842
2843         return pos + sizeof(struct ieee80211_ht_operation);
2844 }
2845
2846 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2847                                    const struct cfg80211_chan_def *chandef)
2848 {
2849         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2850         *pos++ = 3;                                     /* IE length */
2851         /* New channel width */
2852         switch (chandef->width) {
2853         case NL80211_CHAN_WIDTH_80:
2854                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2855                 break;
2856         case NL80211_CHAN_WIDTH_160:
2857                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2858                 break;
2859         case NL80211_CHAN_WIDTH_80P80:
2860                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2861                 break;
2862         default:
2863                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2864         }
2865
2866         /* new center frequency segment 0 */
2867         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2868         /* new center frequency segment 1 */
2869         if (chandef->center_freq2)
2870                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2871         else
2872                 *pos++ = 0;
2873 }
2874
2875 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2876                                 const struct cfg80211_chan_def *chandef)
2877 {
2878         struct ieee80211_vht_operation *vht_oper;
2879
2880         *pos++ = WLAN_EID_VHT_OPERATION;
2881         *pos++ = sizeof(struct ieee80211_vht_operation);
2882         vht_oper = (struct ieee80211_vht_operation *)pos;
2883         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2884                                                         chandef->center_freq1);
2885         if (chandef->center_freq2)
2886                 vht_oper->center_freq_seg1_idx =
2887                         ieee80211_frequency_to_channel(chandef->center_freq2);
2888         else
2889                 vht_oper->center_freq_seg1_idx = 0x00;
2890
2891         switch (chandef->width) {
2892         case NL80211_CHAN_WIDTH_160:
2893                 /*
2894                  * Convert 160 MHz channel width to new style as interop
2895                  * workaround.
2896                  */
2897                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2898                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2899                 if (chandef->chan->center_freq < chandef->center_freq1)
2900                         vht_oper->center_freq_seg0_idx -= 8;
2901                 else
2902                         vht_oper->center_freq_seg0_idx += 8;
2903                 break;
2904         case NL80211_CHAN_WIDTH_80P80:
2905                 /*
2906                  * Convert 80+80 MHz channel width to new style as interop
2907                  * workaround.
2908                  */
2909                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2910                 break;
2911         case NL80211_CHAN_WIDTH_80:
2912                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2913                 break;
2914         default:
2915                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2916                 break;
2917         }
2918
2919         /* don't require special VHT peer rates */
2920         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2921
2922         return pos + sizeof(struct ieee80211_vht_operation);
2923 }
2924
2925 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2926 {
2927         struct ieee80211_he_operation *he_oper;
2928         u32 he_oper_params;
2929
2930         *pos++ = WLAN_EID_EXTENSION;
2931         *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2932         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2933
2934         he_oper_params = 0;
2935         he_oper_params |= u32_encode_bits(1023, /* disabled */
2936                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2937         he_oper_params |= u32_encode_bits(1,
2938                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2939         he_oper_params |= u32_encode_bits(1,
2940                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2941
2942         he_oper = (struct ieee80211_he_operation *)pos;
2943         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2944
2945         /* don't require special HE peer rates */
2946         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2947
2948         /* TODO add VHT operational and 6GHz operational subelement? */
2949
2950         return pos + sizeof(struct ieee80211_vht_operation);
2951 }
2952
2953 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2954                                struct cfg80211_chan_def *chandef)
2955 {
2956         enum nl80211_channel_type channel_type;
2957
2958         if (!ht_oper)
2959                 return false;
2960
2961         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2962         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2963                 channel_type = NL80211_CHAN_HT20;
2964                 break;
2965         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2966                 channel_type = NL80211_CHAN_HT40PLUS;
2967                 break;
2968         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2969                 channel_type = NL80211_CHAN_HT40MINUS;
2970                 break;
2971         default:
2972                 channel_type = NL80211_CHAN_NO_HT;
2973                 return false;
2974         }
2975
2976         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2977         return true;
2978 }
2979
2980 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2981                                 const struct ieee80211_vht_operation *oper,
2982                                 const struct ieee80211_ht_operation *htop,
2983                                 struct cfg80211_chan_def *chandef)
2984 {
2985         struct cfg80211_chan_def new = *chandef;
2986         int cf0, cf1;
2987         int ccfs0, ccfs1, ccfs2;
2988         int ccf0, ccf1;
2989
2990         if (!oper || !htop)
2991                 return false;
2992
2993         ccfs0 = oper->center_freq_seg0_idx;
2994         ccfs1 = oper->center_freq_seg1_idx;
2995         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2996                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2997                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2998
2999         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3000         ccf0 = ccfs0;
3001         ccf1 = ccfs1;
3002         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3003                 ccf1 = ccfs2;
3004
3005         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3006         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3007
3008         switch (oper->chan_width) {
3009         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3010                 /* just use HT information directly */
3011                 break;
3012         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3013                 new.width = NL80211_CHAN_WIDTH_80;
3014                 new.center_freq1 = cf0;
3015                 /* If needed, adjust based on the newer interop workaround. */
3016                 if (ccf1) {
3017                         unsigned int diff;
3018
3019                         diff = abs(ccf1 - ccf0);
3020                         if (diff == 8) {
3021                                 new.width = NL80211_CHAN_WIDTH_160;
3022                                 new.center_freq1 = cf1;
3023                         } else if (diff > 8) {
3024                                 new.width = NL80211_CHAN_WIDTH_80P80;
3025                                 new.center_freq2 = cf1;
3026                         }
3027                 }
3028                 break;
3029         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3030                 /* deprecated encoding */
3031                 new.width = NL80211_CHAN_WIDTH_160;
3032                 new.center_freq1 = cf0;
3033                 break;
3034         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3035                 /* deprecated encoding */
3036                 new.width = NL80211_CHAN_WIDTH_80P80;
3037                 new.center_freq1 = cf0;
3038                 new.center_freq2 = cf1;
3039                 break;
3040         default:
3041                 return false;
3042         }
3043
3044         if (!cfg80211_chandef_valid(&new))
3045                 return false;
3046
3047         *chandef = new;
3048         return true;
3049 }
3050
3051 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3052                              const struct ieee80211_supported_band *sband,
3053                              const u8 *srates, int srates_len, u32 *rates)
3054 {
3055         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3056         int shift = ieee80211_chandef_get_shift(chandef);
3057         struct ieee80211_rate *br;
3058         int brate, rate, i, j, count = 0;
3059
3060         *rates = 0;
3061
3062         for (i = 0; i < srates_len; i++) {
3063                 rate = srates[i] & 0x7f;
3064
3065                 for (j = 0; j < sband->n_bitrates; j++) {
3066                         br = &sband->bitrates[j];
3067                         if ((rate_flags & br->flags) != rate_flags)
3068                                 continue;
3069
3070                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3071                         if (brate == rate) {
3072                                 *rates |= BIT(j);
3073                                 count++;
3074                                 break;
3075                         }
3076                 }
3077         }
3078         return count;
3079 }
3080
3081 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3082                             struct sk_buff *skb, bool need_basic,
3083                             enum nl80211_band band)
3084 {
3085         struct ieee80211_local *local = sdata->local;
3086         struct ieee80211_supported_band *sband;
3087         int rate, shift;
3088         u8 i, rates, *pos;
3089         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3090         u32 rate_flags;
3091
3092         shift = ieee80211_vif_get_shift(&sdata->vif);
3093         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3094         sband = local->hw.wiphy->bands[band];
3095         rates = 0;
3096         for (i = 0; i < sband->n_bitrates; i++) {
3097                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3098                         continue;
3099                 rates++;
3100         }
3101         if (rates > 8)
3102                 rates = 8;
3103
3104         if (skb_tailroom(skb) < rates + 2)
3105                 return -ENOMEM;
3106
3107         pos = skb_put(skb, rates + 2);
3108         *pos++ = WLAN_EID_SUPP_RATES;
3109         *pos++ = rates;
3110         for (i = 0; i < rates; i++) {
3111                 u8 basic = 0;
3112                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3113                         continue;
3114
3115                 if (need_basic && basic_rates & BIT(i))
3116                         basic = 0x80;
3117                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3118                                     5 * (1 << shift));
3119                 *pos++ = basic | (u8) rate;
3120         }
3121
3122         return 0;
3123 }
3124
3125 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3126                                 struct sk_buff *skb, bool need_basic,
3127                                 enum nl80211_band band)
3128 {
3129         struct ieee80211_local *local = sdata->local;
3130         struct ieee80211_supported_band *sband;
3131         int rate, shift;
3132         u8 i, exrates, *pos;
3133         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3134         u32 rate_flags;
3135
3136         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3137         shift = ieee80211_vif_get_shift(&sdata->vif);
3138
3139         sband = local->hw.wiphy->bands[band];
3140         exrates = 0;
3141         for (i = 0; i < sband->n_bitrates; i++) {
3142                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3143                         continue;
3144                 exrates++;
3145         }
3146
3147         if (exrates > 8)
3148                 exrates -= 8;
3149         else
3150                 exrates = 0;
3151
3152         if (skb_tailroom(skb) < exrates + 2)
3153                 return -ENOMEM;
3154
3155         if (exrates) {
3156                 pos = skb_put(skb, exrates + 2);
3157                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3158                 *pos++ = exrates;
3159                 for (i = 8; i < sband->n_bitrates; i++) {
3160                         u8 basic = 0;
3161                         if ((rate_flags & sband->bitrates[i].flags)
3162                             != rate_flags)
3163                                 continue;
3164                         if (need_basic && basic_rates & BIT(i))
3165                                 basic = 0x80;
3166                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3167                                             5 * (1 << shift));
3168                         *pos++ = basic | (u8) rate;
3169                 }
3170         }
3171         return 0;
3172 }
3173
3174 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3175 {
3176         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3177         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3178
3179         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3180                 /* non-managed type inferfaces */
3181                 return 0;
3182         }
3183         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3184 }
3185 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3186
3187 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3188 {
3189         if (!mcs)
3190                 return 1;
3191
3192         /* TODO: consider rx_highest */
3193
3194         if (mcs->rx_mask[3])
3195                 return 4;
3196         if (mcs->rx_mask[2])
3197                 return 3;
3198         if (mcs->rx_mask[1])
3199                 return 2;
3200         return 1;
3201 }
3202
3203 /**
3204  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3205  * @local: mac80211 hw info struct
3206  * @status: RX status
3207  * @mpdu_len: total MPDU length (including FCS)
3208  * @mpdu_offset: offset into MPDU to calculate timestamp at
3209  *
3210  * This function calculates the RX timestamp at the given MPDU offset, taking
3211  * into account what the RX timestamp was. An offset of 0 will just normalize
3212  * the timestamp to TSF at beginning of MPDU reception.
3213  */
3214 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3215                                      struct ieee80211_rx_status *status,
3216                                      unsigned int mpdu_len,
3217                                      unsigned int mpdu_offset)
3218 {
3219         u64 ts = status->mactime;
3220         struct rate_info ri;
3221         u16 rate;
3222
3223         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3224                 return 0;
3225
3226         memset(&ri, 0, sizeof(ri));
3227
3228         ri.bw = status->bw;
3229
3230         /* Fill cfg80211 rate info */
3231         switch (status->encoding) {
3232         case RX_ENC_HT:
3233                 ri.mcs = status->rate_idx;
3234                 ri.flags |= RATE_INFO_FLAGS_MCS;
3235                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3236                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3237                 break;
3238         case RX_ENC_VHT:
3239                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3240                 ri.mcs = status->rate_idx;
3241                 ri.nss = status->nss;
3242                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3243                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3244                 break;
3245         default:
3246                 WARN_ON(1);
3247                 /* fall through */
3248         case RX_ENC_LEGACY: {
3249                 struct ieee80211_supported_band *sband;
3250                 int shift = 0;
3251                 int bitrate;
3252
3253                 switch (status->bw) {
3254                 case RATE_INFO_BW_10:
3255                         shift = 1;
3256                         break;
3257                 case RATE_INFO_BW_5:
3258                         shift = 2;
3259                         break;
3260                 }
3261
3262                 sband = local->hw.wiphy->bands[status->band];
3263                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3264                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3265
3266                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3267                         /* TODO: handle HT/VHT preambles */
3268                         if (status->band == NL80211_BAND_5GHZ) {
3269                                 ts += 20 << shift;
3270                                 mpdu_offset += 2;
3271                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3272                                 ts += 96;
3273                         } else {
3274                                 ts += 192;
3275                         }
3276                 }
3277                 break;
3278                 }
3279         }
3280
3281         rate = cfg80211_calculate_bitrate(&ri);
3282         if (WARN_ONCE(!rate,
3283                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3284                       (unsigned long long)status->flag, status->rate_idx,
3285                       status->nss))
3286                 return 0;
3287
3288         /* rewind from end of MPDU */
3289         if (status->flag & RX_FLAG_MACTIME_END)
3290                 ts -= mpdu_len * 8 * 10 / rate;
3291
3292         ts += mpdu_offset * 8 * 10 / rate;
3293
3294         return ts;
3295 }
3296
3297 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3298 {
3299         struct ieee80211_sub_if_data *sdata;
3300         struct cfg80211_chan_def chandef;
3301
3302         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3303         ASSERT_RTNL();
3304
3305         mutex_lock(&local->mtx);
3306         list_for_each_entry(sdata, &local->interfaces, list) {
3307                 /* it might be waiting for the local->mtx, but then
3308                  * by the time it gets it, sdata->wdev.cac_started
3309                  * will no longer be true
3310                  */
3311                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3312
3313                 if (sdata->wdev.cac_started) {
3314                         chandef = sdata->vif.bss_conf.chandef;
3315                         ieee80211_vif_release_channel(sdata);
3316                         cfg80211_cac_event(sdata->dev,
3317                                            &chandef,
3318                                            NL80211_RADAR_CAC_ABORTED,
3319                                            GFP_KERNEL);
3320                 }
3321         }
3322         mutex_unlock(&local->mtx);
3323 }
3324
3325 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3326 {
3327         struct ieee80211_local *local =
3328                 container_of(work, struct ieee80211_local, radar_detected_work);
3329         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3330         struct ieee80211_chanctx *ctx;
3331         int num_chanctx = 0;
3332
3333         mutex_lock(&local->chanctx_mtx);
3334         list_for_each_entry(ctx, &local->chanctx_list, list) {
3335                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3336                         continue;
3337
3338                 num_chanctx++;
3339                 chandef = ctx->conf.def;
3340         }
3341         mutex_unlock(&local->chanctx_mtx);
3342
3343         rtnl_lock();
3344         ieee80211_dfs_cac_cancel(local);
3345         rtnl_unlock();
3346
3347         if (num_chanctx > 1)
3348                 /* XXX: multi-channel is not supported yet */
3349                 WARN_ON(1);
3350         else
3351                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3352 }
3353
3354 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3355 {
3356         struct ieee80211_local *local = hw_to_local(hw);
3357
3358         trace_api_radar_detected(local);
3359
3360         schedule_work(&local->radar_detected_work);
3361 }
3362 EXPORT_SYMBOL(ieee80211_radar_detected);
3363
3364 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3365 {
3366         u32 ret;
3367         int tmp;
3368
3369         switch (c->width) {
3370         case NL80211_CHAN_WIDTH_20:
3371                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3372                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3373                 break;
3374         case NL80211_CHAN_WIDTH_40:
3375                 c->width = NL80211_CHAN_WIDTH_20;
3376                 c->center_freq1 = c->chan->center_freq;
3377                 ret = IEEE80211_STA_DISABLE_40MHZ |
3378                       IEEE80211_STA_DISABLE_VHT;
3379                 break;
3380         case NL80211_CHAN_WIDTH_80:
3381                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3382                 /* n_P40 */
3383                 tmp /= 2;
3384                 /* freq_P40 */
3385                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3386                 c->width = NL80211_CHAN_WIDTH_40;
3387                 ret = IEEE80211_STA_DISABLE_VHT;
3388                 break;
3389         case NL80211_CHAN_WIDTH_80P80:
3390                 c->center_freq2 = 0;
3391                 c->width = NL80211_CHAN_WIDTH_80;
3392                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3393                       IEEE80211_STA_DISABLE_160MHZ;
3394                 break;
3395         case NL80211_CHAN_WIDTH_160:
3396                 /* n_P20 */
3397                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3398                 /* n_P80 */
3399                 tmp /= 4;
3400                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3401                 c->width = NL80211_CHAN_WIDTH_80;
3402                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3403                       IEEE80211_STA_DISABLE_160MHZ;
3404                 break;
3405         default:
3406         case NL80211_CHAN_WIDTH_20_NOHT:
3407                 WARN_ON_ONCE(1);
3408                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3409                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3410                 break;
3411         case NL80211_CHAN_WIDTH_5:
3412         case NL80211_CHAN_WIDTH_10:
3413                 WARN_ON_ONCE(1);
3414                 /* keep c->width */
3415                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3416                 break;
3417         }
3418
3419         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3420
3421         return ret;
3422 }
3423
3424 /*
3425  * Returns true if smps_mode_new is strictly more restrictive than
3426  * smps_mode_old.
3427  */
3428 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3429                                    enum ieee80211_smps_mode smps_mode_new)
3430 {
3431         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3432                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3433                 return false;
3434
3435         switch (smps_mode_old) {
3436         case IEEE80211_SMPS_STATIC:
3437                 return false;
3438         case IEEE80211_SMPS_DYNAMIC:
3439                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3440         case IEEE80211_SMPS_OFF:
3441                 return smps_mode_new != IEEE80211_SMPS_OFF;
3442         default:
3443                 WARN_ON(1);
3444         }
3445
3446         return false;
3447 }
3448
3449 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3450                               struct cfg80211_csa_settings *csa_settings)
3451 {
3452         struct sk_buff *skb;
3453         struct ieee80211_mgmt *mgmt;
3454         struct ieee80211_local *local = sdata->local;
3455         int freq;
3456         int hdr_len = offsetofend(struct ieee80211_mgmt,
3457                                   u.action.u.chan_switch);
3458         u8 *pos;
3459
3460         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3461             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3462                 return -EOPNOTSUPP;
3463
3464         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3465                             5 + /* channel switch announcement element */
3466                             3 + /* secondary channel offset element */
3467                             5 + /* wide bandwidth channel switch announcement */
3468                             8); /* mesh channel switch parameters element */
3469         if (!skb)
3470                 return -ENOMEM;
3471
3472         skb_reserve(skb, local->tx_headroom);
3473         mgmt = skb_put_zero(skb, hdr_len);
3474         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3475                                           IEEE80211_STYPE_ACTION);
3476
3477         eth_broadcast_addr(mgmt->da);
3478         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3479         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3480                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3481         } else {
3482                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3483                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3484         }
3485         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3486         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3487         pos = skb_put(skb, 5);
3488         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3489         *pos++ = 3;                                             /* IE length */
3490         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3491         freq = csa_settings->chandef.chan->center_freq;
3492         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3493         *pos++ = csa_settings->count;                           /* count */
3494
3495         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3496                 enum nl80211_channel_type ch_type;
3497
3498                 skb_put(skb, 3);
3499                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3500                 *pos++ = 1;                                     /* IE length */
3501                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3502                 if (ch_type == NL80211_CHAN_HT40PLUS)
3503                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3504                 else
3505                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3506         }
3507
3508         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3509                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3510
3511                 skb_put(skb, 8);
3512                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3513                 *pos++ = 6;                                     /* IE length */
3514                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3515                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3516                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3517                 *pos++ |= csa_settings->block_tx ?
3518                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3519                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3520                 pos += 2;
3521                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3522                 pos += 2;
3523         }
3524
3525         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3526             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3527             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3528                 skb_put(skb, 5);
3529                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3530         }
3531
3532         ieee80211_tx_skb(sdata, skb);
3533         return 0;
3534 }
3535
3536 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3537 {
3538         return !(cs == NULL || cs->cipher == 0 ||
3539                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3540                  cs->hdr_len <= cs->key_idx_off ||
3541                  cs->key_idx_shift > 7 ||
3542                  cs->key_idx_mask == 0);
3543 }
3544
3545 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3546 {
3547         int i;
3548
3549         /* Ensure we have enough iftype bitmap space for all iftype values */
3550         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3551
3552         for (i = 0; i < n; i++)
3553                 if (!ieee80211_cs_valid(&cs[i]))
3554                         return false;
3555
3556         return true;
3557 }
3558
3559 const struct ieee80211_cipher_scheme *
3560 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3561                  enum nl80211_iftype iftype)
3562 {
3563         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3564         int n = local->hw.n_cipher_schemes;
3565         int i;
3566         const struct ieee80211_cipher_scheme *cs = NULL;
3567
3568         for (i = 0; i < n; i++) {
3569                 if (l[i].cipher == cipher) {
3570                         cs = &l[i];
3571                         break;
3572                 }
3573         }
3574
3575         if (!cs || !(cs->iftype & BIT(iftype)))
3576                 return NULL;
3577
3578         return cs;
3579 }
3580
3581 int ieee80211_cs_headroom(struct ieee80211_local *local,
3582                           struct cfg80211_crypto_settings *crypto,
3583                           enum nl80211_iftype iftype)
3584 {
3585         const struct ieee80211_cipher_scheme *cs;
3586         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3587         int i;
3588
3589         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3590                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3591                                       iftype);
3592
3593                 if (cs && headroom < cs->hdr_len)
3594                         headroom = cs->hdr_len;
3595         }
3596
3597         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3598         if (cs && headroom < cs->hdr_len)
3599                 headroom = cs->hdr_len;
3600
3601         return headroom;
3602 }
3603
3604 static bool
3605 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3606 {
3607         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3608         int skip;
3609
3610         if (end > 0)
3611                 return false;
3612
3613         /* One shot NOA  */
3614         if (data->count[i] == 1)
3615                 return false;
3616
3617         if (data->desc[i].interval == 0)
3618                 return false;
3619
3620         /* End time is in the past, check for repetitions */
3621         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3622         if (data->count[i] < 255) {
3623                 if (data->count[i] <= skip) {
3624                         data->count[i] = 0;
3625                         return false;
3626                 }
3627
3628                 data->count[i] -= skip;
3629         }
3630
3631         data->desc[i].start += skip * data->desc[i].interval;
3632
3633         return true;
3634 }
3635
3636 static bool
3637 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3638                              s32 *offset)
3639 {
3640         bool ret = false;
3641         int i;
3642
3643         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3644                 s32 cur;
3645
3646                 if (!data->count[i])
3647                         continue;
3648
3649                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3650                         ret = true;
3651
3652                 cur = data->desc[i].start - tsf;
3653                 if (cur > *offset)
3654                         continue;
3655
3656                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3657                 if (cur > *offset)
3658                         *offset = cur;
3659         }
3660
3661         return ret;
3662 }
3663
3664 static u32
3665 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3666 {
3667         s32 offset = 0;
3668         int tries = 0;
3669         /*
3670          * arbitrary limit, used to avoid infinite loops when combined NoA
3671          * descriptors cover the full time period.
3672          */
3673         int max_tries = 5;
3674
3675         ieee80211_extend_absent_time(data, tsf, &offset);
3676         do {
3677                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3678                         break;
3679
3680                 tries++;
3681         } while (tries < max_tries);
3682
3683         return offset;
3684 }
3685
3686 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3687 {
3688         u32 next_offset = BIT(31) - 1;
3689         int i;
3690
3691         data->absent = 0;
3692         data->has_next_tsf = false;
3693         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3694                 s32 start;
3695
3696                 if (!data->count[i])
3697                         continue;
3698
3699                 ieee80211_extend_noa_desc(data, tsf, i);
3700                 start = data->desc[i].start - tsf;
3701                 if (start <= 0)
3702                         data->absent |= BIT(i);
3703
3704                 if (next_offset > start)
3705                         next_offset = start;
3706
3707                 data->has_next_tsf = true;
3708         }
3709
3710         if (data->absent)
3711                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3712
3713         data->next_tsf = tsf + next_offset;
3714 }
3715 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3716
3717 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3718                             struct ieee80211_noa_data *data, u32 tsf)
3719 {
3720         int ret = 0;
3721         int i;
3722
3723         memset(data, 0, sizeof(*data));
3724
3725         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3726                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3727
3728                 if (!desc->count || !desc->duration)
3729                         continue;
3730
3731                 data->count[i] = desc->count;
3732                 data->desc[i].start = le32_to_cpu(desc->start_time);
3733                 data->desc[i].duration = le32_to_cpu(desc->duration);
3734                 data->desc[i].interval = le32_to_cpu(desc->interval);
3735
3736                 if (data->count[i] > 1 &&
3737                     data->desc[i].interval < data->desc[i].duration)
3738                         continue;
3739
3740                 ieee80211_extend_noa_desc(data, tsf, i);
3741                 ret++;
3742         }
3743
3744         if (ret)
3745                 ieee80211_update_p2p_noa(data, tsf);
3746
3747         return ret;
3748 }
3749 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3750
3751 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3752                            struct ieee80211_sub_if_data *sdata)
3753 {
3754         u64 tsf = drv_get_tsf(local, sdata);
3755         u64 dtim_count = 0;
3756         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3757         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3758         struct ps_data *ps;
3759         u8 bcns_from_dtim;
3760
3761         if (tsf == -1ULL || !beacon_int || !dtim_period)
3762                 return;
3763
3764         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3765             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3766                 if (!sdata->bss)
3767                         return;
3768
3769                 ps = &sdata->bss->ps;
3770         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3771                 ps = &sdata->u.mesh.ps;
3772         } else {
3773                 return;
3774         }
3775
3776         /*
3777          * actually finds last dtim_count, mac80211 will update in
3778          * __beacon_add_tim().
3779          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3780          */
3781         do_div(tsf, beacon_int);
3782         bcns_from_dtim = do_div(tsf, dtim_period);
3783         /* just had a DTIM */
3784         if (!bcns_from_dtim)
3785                 dtim_count = 0;
3786         else
3787                 dtim_count = dtim_period - bcns_from_dtim;
3788
3789         ps->dtim_count = dtim_count;
3790 }
3791
3792 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3793                                          struct ieee80211_chanctx *ctx)
3794 {
3795         struct ieee80211_sub_if_data *sdata;
3796         u8 radar_detect = 0;
3797
3798         lockdep_assert_held(&local->chanctx_mtx);
3799
3800         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3801                 return 0;
3802
3803         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3804                 if (sdata->reserved_radar_required)
3805                         radar_detect |= BIT(sdata->reserved_chandef.width);
3806
3807         /*
3808          * An in-place reservation context should not have any assigned vifs
3809          * until it replaces the other context.
3810          */
3811         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3812                 !list_empty(&ctx->assigned_vifs));
3813
3814         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3815                 if (sdata->radar_required)
3816                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3817
3818         return radar_detect;
3819 }
3820
3821 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3822                                  const struct cfg80211_chan_def *chandef,
3823                                  enum ieee80211_chanctx_mode chanmode,
3824                                  u8 radar_detect)
3825 {
3826         struct ieee80211_local *local = sdata->local;
3827         struct ieee80211_sub_if_data *sdata_iter;
3828         enum nl80211_iftype iftype = sdata->wdev.iftype;
3829         struct ieee80211_chanctx *ctx;
3830         int total = 1;
3831         struct iface_combination_params params = {
3832                 .radar_detect = radar_detect,
3833         };
3834
3835         lockdep_assert_held(&local->chanctx_mtx);
3836
3837         if (WARN_ON(hweight32(radar_detect) > 1))
3838                 return -EINVAL;
3839
3840         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3841                     !chandef->chan))
3842                 return -EINVAL;
3843
3844         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3845                 return -EINVAL;
3846
3847         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3848             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3849                 /*
3850                  * always passing this is harmless, since it'll be the
3851                  * same value that cfg80211 finds if it finds the same
3852                  * interface ... and that's always allowed
3853                  */
3854                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3855         }
3856
3857         /* Always allow software iftypes */
3858         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3859                 if (radar_detect)
3860                         return -EINVAL;
3861                 return 0;
3862         }
3863
3864         if (chandef)
3865                 params.num_different_channels = 1;
3866
3867         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3868                 params.iftype_num[iftype] = 1;
3869
3870         list_for_each_entry(ctx, &local->chanctx_list, list) {
3871                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3872                         continue;
3873                 params.radar_detect |=
3874                         ieee80211_chanctx_radar_detect(local, ctx);
3875                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3876                         params.num_different_channels++;
3877                         continue;
3878                 }
3879                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3880                     cfg80211_chandef_compatible(chandef,
3881                                                 &ctx->conf.def))
3882                         continue;
3883                 params.num_different_channels++;
3884         }
3885
3886         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3887                 struct wireless_dev *wdev_iter;
3888
3889                 wdev_iter = &sdata_iter->wdev;
3890
3891                 if (sdata_iter == sdata ||
3892                     !ieee80211_sdata_running(sdata_iter) ||
3893                     cfg80211_iftype_allowed(local->hw.wiphy,
3894                                             wdev_iter->iftype, 0, 1))
3895                         continue;
3896
3897                 params.iftype_num[wdev_iter->iftype]++;
3898                 total++;
3899         }
3900
3901         if (total == 1 && !params.radar_detect)
3902                 return 0;
3903
3904         return cfg80211_check_combinations(local->hw.wiphy, &params);
3905 }
3906
3907 static void
3908 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3909                          void *data)
3910 {
3911         u32 *max_num_different_channels = data;
3912
3913         *max_num_different_channels = max(*max_num_different_channels,
3914                                           c->num_different_channels);
3915 }
3916
3917 int ieee80211_max_num_channels(struct ieee80211_local *local)
3918 {
3919         struct ieee80211_sub_if_data *sdata;
3920         struct ieee80211_chanctx *ctx;
3921         u32 max_num_different_channels = 1;
3922         int err;
3923         struct iface_combination_params params = {0};
3924
3925         lockdep_assert_held(&local->chanctx_mtx);
3926
3927         list_for_each_entry(ctx, &local->chanctx_list, list) {
3928                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3929                         continue;
3930
3931                 params.num_different_channels++;
3932
3933                 params.radar_detect |=
3934                         ieee80211_chanctx_radar_detect(local, ctx);
3935         }
3936
3937         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3938                 params.iftype_num[sdata->wdev.iftype]++;
3939
3940         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3941                                          ieee80211_iter_max_chans,
3942                                          &max_num_different_channels);
3943         if (err < 0)
3944                 return err;
3945
3946         return max_num_different_channels;
3947 }
3948
3949 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3950 {
3951         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3952         *buf++ = 7; /* len */
3953         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3954         *buf++ = 0x50;
3955         *buf++ = 0xf2;
3956         *buf++ = 2; /* WME */
3957         *buf++ = 0; /* WME info */
3958         *buf++ = 1; /* WME ver */
3959         *buf++ = qosinfo; /* U-APSD no in use */
3960
3961         return buf;
3962 }
3963
3964 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3965                              unsigned long *frame_cnt,
3966                              unsigned long *byte_cnt)
3967 {
3968         struct txq_info *txqi = to_txq_info(txq);
3969         u32 frag_cnt = 0, frag_bytes = 0;
3970         struct sk_buff *skb;
3971
3972         skb_queue_walk(&txqi->frags, skb) {
3973                 frag_cnt++;
3974                 frag_bytes += skb->len;
3975         }
3976
3977         if (frame_cnt)
3978                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3979
3980         if (byte_cnt)
3981                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3982 }
3983 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3984
3985 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3986         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3987         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3988         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3989         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3990 };