net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2019 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42         BUG_ON(!wiphy);
  43
  44         local = wiphy_priv(wiphy);
  45         return &local->hw;
  46 }
  47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  48
  49 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  50 {
  51         struct sk_buff *skb;
  52         struct ieee80211_hdr *hdr;
  53
  54         skb_queue_walk(&tx->skbs, skb) {
  55                 hdr = (struct ieee80211_hdr *) skb->data;
  56                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  57         }
  58 }
  59
  60 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  61                              int rate, int erp, int short_preamble,
  62                              int shift)
  63 {
  64         int dur;
  65
  66         /* calculate duration (in microseconds, rounded up to next higher
  67          * integer if it includes a fractional microsecond) to send frame of
  68          * len bytes (does not include FCS) at the given rate. Duration will
  69          * also include SIFS.
  70          *
  71          * rate is in 100 kbps, so divident is multiplied by 10 in the
  72          * DIV_ROUND_UP() operations.
  73          *
  74          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  75          * is assumed to be 0 otherwise.
  76          */
  77
  78         if (band == NL80211_BAND_5GHZ || erp) {
  79                 /*
  80                  * OFDM:
  81                  *
  82                  * N_DBPS = DATARATE x 4
  83                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  84                  *      (16 = SIGNAL time, 6 = tail bits)
  85                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  86                  *
  87                  * T_SYM = 4 usec
  88                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  89                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  90                  *      signal ext = 6 usec
  91                  */
  92                 dur = 16; /* SIFS + signal ext */
  93                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  94                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  95
  96                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  97                  *  * times 4 for 5 MHz
  98                  *  * times 2 for 10 MHz
  99                  */
 100                 dur *= 1 << shift;
 101
 102                 /* rates should already consider the channel bandwidth,
 103                  * don't apply divisor again.
 104                  */
 105                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 106                                         4 * rate); /* T_SYM x N_SYM */
 107         } else {
 108                 /*
 109                  * 802.11b or 802.11g with 802.11b compatibility:
 110                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 111                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 112                  *
 113                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 114                  * aSIFSTime = 10 usec
 115                  * aPreambleLength = 144 usec or 72 usec with short preamble
 116                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 117                  */
 118                 dur = 10; /* aSIFSTime = 10 usec */
 119                 dur += short_preamble ? (72 + 24) : (144 + 48);
 120
 121                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 122         }
 123
 124         return dur;
 125 }
 126
 127 /* Exported duration function for driver use */
 128 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 129                                         struct ieee80211_vif *vif,
 130                                         enum nl80211_band band,
 131                                         size_t frame_len,
 132                                         struct ieee80211_rate *rate)
 133 {
 134         struct ieee80211_sub_if_data *sdata;
 135         u16 dur;
 136         int erp, shift = 0;
 137         bool short_preamble = false;
 138
 139         erp = 0;
 140         if (vif) {
 141                 sdata = vif_to_sdata(vif);
 142                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 143                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 144                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 145                 shift = ieee80211_vif_get_shift(vif);
 146         }
 147
 148         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 149                                        short_preamble, shift);
 150
 151         return cpu_to_le16(dur);
 152 }
 153 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 154
 155 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 156                               struct ieee80211_vif *vif, size_t frame_len,
 157                               const struct ieee80211_tx_info *frame_txctl)
 158 {
 159         struct ieee80211_local *local = hw_to_local(hw);
 160         struct ieee80211_rate *rate;
 161         struct ieee80211_sub_if_data *sdata;
 162         bool short_preamble;
 163         int erp, shift = 0, bitrate;
 164         u16 dur;
 165         struct ieee80211_supported_band *sband;
 166
 167         sband = local->hw.wiphy->bands[frame_txctl->band];
 168
 169         short_preamble = false;
 170
 171         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 172
 173         erp = 0;
 174         if (vif) {
 175                 sdata = vif_to_sdata(vif);
 176                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 177                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 178                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 179                 shift = ieee80211_vif_get_shift(vif);
 180         }
 181
 182         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 183
 184         /* CTS duration */
 185         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 186                                        erp, short_preamble, shift);
 187         /* Data frame duration */
 188         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 189                                         erp, short_preamble, shift);
 190         /* ACK duration */
 191         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 192                                         erp, short_preamble, shift);
 193
 194         return cpu_to_le16(dur);
 195 }
 196 EXPORT_SYMBOL(ieee80211_rts_duration);
 197
 198 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 199                                     struct ieee80211_vif *vif,
 200                                     size_t frame_len,
 201                                     const struct ieee80211_tx_info *frame_txctl)
 202 {
 203         struct ieee80211_local *local = hw_to_local(hw);
 204         struct ieee80211_rate *rate;
 205         struct ieee80211_sub_if_data *sdata;
 206         bool short_preamble;
 207         int erp, shift = 0, bitrate;
 208         u16 dur;
 209         struct ieee80211_supported_band *sband;
 210
 211         sband = local->hw.wiphy->bands[frame_txctl->band];
 212
 213         short_preamble = false;
 214
 215         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 216         erp = 0;
 217         if (vif) {
 218                 sdata = vif_to_sdata(vif);
 219                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 220                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 221                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 222                 shift = ieee80211_vif_get_shift(vif);
 223         }
 224
 225         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 226
 227         /* Data frame duration */
 228         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 229                                        erp, short_preamble, shift);
 230         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 231                 /* ACK duration */
 232                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 233                                                 erp, short_preamble, shift);
 234         }
 235
 236         return cpu_to_le16(dur);
 237 }
 238 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 239
 240 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 241 {
 242         struct ieee80211_local *local = sdata->local;
 243         struct ieee80211_vif *vif = &sdata->vif;
 244         struct fq *fq = &local->fq;
 245         struct ps_data *ps = NULL;
 246         struct txq_info *txqi;
 247         struct sta_info *sta;
 248         int i;
 249
 250         local_bh_disable();
 251         spin_lock(&fq->lock);
 252
 253         if (sdata->vif.type == NL80211_IFTYPE_AP)
 254                 ps = &sdata->bss->ps;
 255
 256         sdata->vif.txqs_stopped[ac] = false;
 257
 258         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 259                 if (sdata != sta->sdata)
 260                         continue;
 261
 262                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 263                         struct ieee80211_txq *txq = sta->sta.txq[i];
 264
 265                         if (!txq)
 266                                 continue;
 267
 268                         txqi = to_txq_info(txq);
 269
 270                         if (ac != txq->ac)
 271                                 continue;
 272
 273                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 274                                                 &txqi->flags))
 275                                 continue;
 276
 277                         spin_unlock(&fq->lock);
 278                         drv_wake_tx_queue(local, txqi);
 279                         spin_lock(&fq->lock);
 280                 }
 281         }
 282
 283         if (!vif->txq)
 284                 goto out;
 285
 286         txqi = to_txq_info(vif->txq);
 287
 288         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 289             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 290                 goto out;
 291
 292         spin_unlock(&fq->lock);
 293
 294         drv_wake_tx_queue(local, txqi);
 295         local_bh_enable();
 296         return;
 297 out:
 298         spin_unlock(&fq->lock);
 299         local_bh_enable();
 300 }
 301
 302 static void
 303 __releases(&local->queue_stop_reason_lock)
 304 __acquires(&local->queue_stop_reason_lock)
 305 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 306 {
 307         struct ieee80211_sub_if_data *sdata;
 308         int n_acs = IEEE80211_NUM_ACS;
 309         int i;
 310
 311         rcu_read_lock();
 312
 313         if (local->hw.queues < IEEE80211_NUM_ACS)
 314                 n_acs = 1;
 315
 316         for (i = 0; i < local->hw.queues; i++) {
 317                 if (local->queue_stop_reasons[i])
 318                         continue;
 319
 320                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 321                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 322                         int ac;
 323
 324                         for (ac = 0; ac < n_acs; ac++) {
 325                                 int ac_queue = sdata->vif.hw_queue[ac];
 326
 327                                 if (ac_queue == i ||
 328                                     sdata->vif.cab_queue == i)
 329                                         __ieee80211_wake_txqs(sdata, ac);
 330                         }
 331                 }
 332                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 333         }
 334
 335         rcu_read_unlock();
 336 }
 337
 338 void ieee80211_wake_txqs(unsigned long data)
 339 {
 340         struct ieee80211_local *local = (struct ieee80211_local *)data;
 341         unsigned long flags;
 342
 343         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 344         _ieee80211_wake_txqs(local, &flags);
 345         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 346 }
 347
 348 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 349 {
 350         struct ieee80211_sub_if_data *sdata;
 351         int n_acs = IEEE80211_NUM_ACS;
 352
 353         if (local->ops->wake_tx_queue)
 354                 return;
 355
 356         if (local->hw.queues < IEEE80211_NUM_ACS)
 357                 n_acs = 1;
 358
 359         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 360                 int ac;
 361
 362                 if (!sdata->dev)
 363                         continue;
 364
 365                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 366                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 367                         continue;
 368
 369                 for (ac = 0; ac < n_acs; ac++) {
 370                         int ac_queue = sdata->vif.hw_queue[ac];
 371
 372                         if (ac_queue == queue ||
 373                             (sdata->vif.cab_queue == queue &&
 374                              local->queue_stop_reasons[ac_queue] == 0 &&
 375                              skb_queue_empty(&local->pending[ac_queue])))
 376                                 netif_wake_subqueue(sdata->dev, ac);
 377                 }
 378         }
 379 }
 380
 381 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 382                                    enum queue_stop_reason reason,
 383                                    bool refcounted,
 384                                    unsigned long *flags)
 385 {
 386         struct ieee80211_local *local = hw_to_local(hw);
 387
 388         trace_wake_queue(local, queue, reason);
 389
 390         if (WARN_ON(queue >= hw->queues))
 391                 return;
 392
 393         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 394                 return;
 395
 396         if (!refcounted) {
 397                 local->q_stop_reasons[queue][reason] = 0;
 398         } else {
 399                 local->q_stop_reasons[queue][reason]--;
 400                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 401                         local->q_stop_reasons[queue][reason] = 0;
 402         }
 403
 404         if (local->q_stop_reasons[queue][reason] == 0)
 405                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 406
 407         if (local->queue_stop_reasons[queue] != 0)
 408                 /* someone still has this queue stopped */
 409                 return;
 410
 411         if (skb_queue_empty(&local->pending[queue])) {
 412                 rcu_read_lock();
 413                 ieee80211_propagate_queue_wake(local, queue);
 414                 rcu_read_unlock();
 415         } else
 416                 tasklet_schedule(&local->tx_pending_tasklet);
 417
 418         /*
 419          * Calling _ieee80211_wake_txqs here can be a problem because it may
 420          * release queue_stop_reason_lock which has been taken by
 421          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 422          * release someone's lock, but it is fine because all the callers of
 423          * __ieee80211_wake_queue call it right before releasing the lock.
 424          */
 425         if (local->ops->wake_tx_queue) {
 426                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 427                         tasklet_schedule(&local->wake_txqs_tasklet);
 428                 else
 429                         _ieee80211_wake_txqs(local, flags);
 430         }
 431 }
 432
 433 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 434                                     enum queue_stop_reason reason,
 435                                     bool refcounted)
 436 {
 437         struct ieee80211_local *local = hw_to_local(hw);
 438         unsigned long flags;
 439
 440         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 441         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 442         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 443 }
 444
 445 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 446 {
 447         ieee80211_wake_queue_by_reason(hw, queue,
 448                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 449                                        false);
 450 }
 451 EXPORT_SYMBOL(ieee80211_wake_queue);
 452
 453 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 454                                    enum queue_stop_reason reason,
 455                                    bool refcounted)
 456 {
 457         struct ieee80211_local *local = hw_to_local(hw);
 458         struct ieee80211_sub_if_data *sdata;
 459         int n_acs = IEEE80211_NUM_ACS;
 460
 461         trace_stop_queue(local, queue, reason);
 462
 463         if (WARN_ON(queue >= hw->queues))
 464                 return;
 465
 466         if (!refcounted)
 467                 local->q_stop_reasons[queue][reason] = 1;
 468         else
 469                 local->q_stop_reasons[queue][reason]++;
 470
 471         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 472                 return;
 473
 474         if (local->hw.queues < IEEE80211_NUM_ACS)
 475                 n_acs = 1;
 476
 477         rcu_read_lock();
 478         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 479                 int ac;
 480
 481                 if (!sdata->dev)
 482                         continue;
 483
 484                 for (ac = 0; ac < n_acs; ac++) {
 485                         if (sdata->vif.hw_queue[ac] == queue ||
 486                             sdata->vif.cab_queue == queue) {
 487                                 if (!local->ops->wake_tx_queue) {
 488                                         netif_stop_subqueue(sdata->dev, ac);
 489                                         continue;
 490                                 }
 491                                 spin_lock(&local->fq.lock);
 492                                 sdata->vif.txqs_stopped[ac] = true;
 493                                 spin_unlock(&local->fq.lock);
 494                         }
 495                 }
 496         }
 497         rcu_read_unlock();
 498 }
 499
 500 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 501                                     enum queue_stop_reason reason,
 502                                     bool refcounted)
 503 {
 504         struct ieee80211_local *local = hw_to_local(hw);
 505         unsigned long flags;
 506
 507         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 508         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 509         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 510 }
 511
 512 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 513 {
 514         ieee80211_stop_queue_by_reason(hw, queue,
 515                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 516                                        false);
 517 }
 518 EXPORT_SYMBOL(ieee80211_stop_queue);
 519
 520 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 521                                struct sk_buff *skb)
 522 {
 523         struct ieee80211_hw *hw = &local->hw;
 524         unsigned long flags;
 525         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 526         int queue = info->hw_queue;
 527
 528         if (WARN_ON(!info->control.vif)) {
 529                 ieee80211_free_txskb(&local->hw, skb);
 530                 return;
 531         }
 532
 533         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 534         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 535                                false);
 536         __skb_queue_tail(&local->pending[queue], skb);
 537         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 538                                false, &flags);
 539         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 540 }
 541
 542 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 543                                 struct sk_buff_head *skbs)
 544 {
 545         struct ieee80211_hw *hw = &local->hw;
 546         struct sk_buff *skb;
 547         unsigned long flags;
 548         int queue, i;
 549
 550         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 551         while ((skb = skb_dequeue(skbs))) {
 552                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 553
 554                 if (WARN_ON(!info->control.vif)) {
 555                         ieee80211_free_txskb(&local->hw, skb);
 556                         continue;
 557                 }
 558
 559                 queue = info->hw_queue;
 560
 561                 __ieee80211_stop_queue(hw, queue,
 562                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 563                                 false);
 564
 565                 __skb_queue_tail(&local->pending[queue], skb);
 566         }
 567
 568         for (i = 0; i < hw->queues; i++)
 569                 __ieee80211_wake_queue(hw, i,
 570                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 571                         false, &flags);
 572         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 573 }
 574
 575 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 576                                      unsigned long queues,
 577                                      enum queue_stop_reason reason,
 578                                      bool refcounted)
 579 {
 580         struct ieee80211_local *local = hw_to_local(hw);
 581         unsigned long flags;
 582         int i;
 583
 584         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 585
 586         for_each_set_bit(i, &queues, hw->queues)
 587                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 588
 589         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 590 }
 591
 592 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 593 {
 594         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 595                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 596                                         false);
 597 }
 598 EXPORT_SYMBOL(ieee80211_stop_queues);
 599
 600 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 601 {
 602         struct ieee80211_local *local = hw_to_local(hw);
 603         unsigned long flags;
 604         int ret;
 605
 606         if (WARN_ON(queue >= hw->queues))
 607                 return true;
 608
 609         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 610         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 611                        &local->queue_stop_reasons[queue]);
 612         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 613         return ret;
 614 }
 615 EXPORT_SYMBOL(ieee80211_queue_stopped);
 616
 617 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 618                                      unsigned long queues,
 619                                      enum queue_stop_reason reason,
 620                                      bool refcounted)
 621 {
 622         struct ieee80211_local *local = hw_to_local(hw);
 623         unsigned long flags;
 624         int i;
 625
 626         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 627
 628         for_each_set_bit(i, &queues, hw->queues)
 629                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 630
 631         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 632 }
 633
 634 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 635 {
 636         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 637                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 638                                         false);
 639 }
 640 EXPORT_SYMBOL(ieee80211_wake_queues);
 641
 642 static unsigned int
 643 ieee80211_get_vif_queues(struct ieee80211_local *local,
 644                          struct ieee80211_sub_if_data *sdata)
 645 {
 646         unsigned int queues;
 647
 648         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 649                 int ac;
 650
 651                 queues = 0;
 652
 653                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 654                         queues |= BIT(sdata->vif.hw_queue[ac]);
 655                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 656                         queues |= BIT(sdata->vif.cab_queue);
 657         } else {
 658                 /* all queues */
 659                 queues = BIT(local->hw.queues) - 1;
 660         }
 661
 662         return queues;
 663 }
 664
 665 void __ieee80211_flush_queues(struct ieee80211_local *local,
 666                               struct ieee80211_sub_if_data *sdata,
 667                               unsigned int queues, bool drop)
 668 {
 669         if (!local->ops->flush)
 670                 return;
 671
 672         /*
 673          * If no queue was set, or if the HW doesn't support
 674          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 675          */
 676         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 677                 queues = ieee80211_get_vif_queues(local, sdata);
 678
 679         ieee80211_stop_queues_by_reason(&local->hw, queues,
 680                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 681                                         false);
 682
 683         drv_flush(local, sdata, queues, drop);
 684
 685         ieee80211_wake_queues_by_reason(&local->hw, queues,
 686                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 687                                         false);
 688 }
 689
 690 void ieee80211_flush_queues(struct ieee80211_local *local,
 691                             struct ieee80211_sub_if_data *sdata, bool drop)
 692 {
 693         __ieee80211_flush_queues(local, sdata, 0, drop);
 694 }
 695
 696 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 697                                struct ieee80211_sub_if_data *sdata,
 698                                enum queue_stop_reason reason)
 699 {
 700         ieee80211_stop_queues_by_reason(&local->hw,
 701                                         ieee80211_get_vif_queues(local, sdata),
 702                                         reason, true);
 703 }
 704
 705 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 706                                struct ieee80211_sub_if_data *sdata,
 707                                enum queue_stop_reason reason)
 708 {
 709         ieee80211_wake_queues_by_reason(&local->hw,
 710                                         ieee80211_get_vif_queues(local, sdata),
 711                                         reason, true);
 712 }
 713
 714 static void __iterate_interfaces(struct ieee80211_local *local,
 715                                  u32 iter_flags,
 716                                  void (*iterator)(void *data, u8 *mac,
 717                                                   struct ieee80211_vif *vif),
 718                                  void *data)
 719 {
 720         struct ieee80211_sub_if_data *sdata;
 721         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 722
 723         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 724                 switch (sdata->vif.type) {
 725                 case NL80211_IFTYPE_MONITOR:
 726                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 727                                 continue;
 728                         break;
 729                 case NL80211_IFTYPE_AP_VLAN:
 730                         continue;
 731                 default:
 732                         break;
 733                 }
 734                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 735                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 736                         continue;
 737                 if (ieee80211_sdata_running(sdata) || !active_only)
 738                         iterator(data, sdata->vif.addr,
 739                                  &sdata->vif);
 740         }
 741
 742         sdata = rcu_dereference_check(local->monitor_sdata,
 743                                       lockdep_is_held(&local->iflist_mtx) ||
 744                                       lockdep_rtnl_is_held());
 745         if (sdata &&
 746             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 747              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 748                 iterator(data, sdata->vif.addr, &sdata->vif);
 749 }
 750
 751 void ieee80211_iterate_interfaces(
 752         struct ieee80211_hw *hw, u32 iter_flags,
 753         void (*iterator)(void *data, u8 *mac,
 754                          struct ieee80211_vif *vif),
 755         void *data)
 756 {
 757         struct ieee80211_local *local = hw_to_local(hw);
 758
 759         mutex_lock(&local->iflist_mtx);
 760         __iterate_interfaces(local, iter_flags, iterator, data);
 761         mutex_unlock(&local->iflist_mtx);
 762 }
 763 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 764
 765 void ieee80211_iterate_active_interfaces_atomic(
 766         struct ieee80211_hw *hw, u32 iter_flags,
 767         void (*iterator)(void *data, u8 *mac,
 768                          struct ieee80211_vif *vif),
 769         void *data)
 770 {
 771         struct ieee80211_local *local = hw_to_local(hw);
 772
 773         rcu_read_lock();
 774         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 775                              iterator, data);
 776         rcu_read_unlock();
 777 }
 778 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 779
 780 void ieee80211_iterate_active_interfaces_rtnl(
 781         struct ieee80211_hw *hw, u32 iter_flags,
 782         void (*iterator)(void *data, u8 *mac,
 783                          struct ieee80211_vif *vif),
 784         void *data)
 785 {
 786         struct ieee80211_local *local = hw_to_local(hw);
 787
 788         ASSERT_RTNL();
 789
 790         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 791                              iterator, data);
 792 }
 793 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 794
 795 static void __iterate_stations(struct ieee80211_local *local,
 796                                void (*iterator)(void *data,
 797                                                 struct ieee80211_sta *sta),
 798                                void *data)
 799 {
 800         struct sta_info *sta;
 801
 802         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 803                 if (!sta->uploaded)
 804                         continue;
 805
 806                 iterator(data, &sta->sta);
 807         }
 808 }
 809
 810 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 811                         void (*iterator)(void *data,
 812                                          struct ieee80211_sta *sta),
 813                         void *data)
 814 {
 815         struct ieee80211_local *local = hw_to_local(hw);
 816
 817         rcu_read_lock();
 818         __iterate_stations(local, iterator, data);
 819         rcu_read_unlock();
 820 }
 821 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 822
 823 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 824 {
 825         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 826
 827         if (!ieee80211_sdata_running(sdata) ||
 828             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 829                 return NULL;
 830         return &sdata->vif;
 831 }
 832 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 833
 834 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 835 {
 836         struct ieee80211_sub_if_data *sdata;
 837
 838         if (!vif)
 839                 return NULL;
 840
 841         sdata = vif_to_sdata(vif);
 842
 843         if (!ieee80211_sdata_running(sdata) ||
 844             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 845                 return NULL;
 846
 847         return &sdata->wdev;
 848 }
 849 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 850
 851 /*
 852  * Nothing should have been stuffed into the workqueue during
 853  * the suspend->resume cycle. Since we can't check each caller
 854  * of this function if we are already quiescing / suspended,
 855  * check here and don't WARN since this can actually happen when
 856  * the rx path (for example) is racing against __ieee80211_suspend
 857  * and suspending / quiescing was set after the rx path checked
 858  * them.
 859  */
 860 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 861 {
 862         if (local->quiescing || (local->suspended && !local->resuming)) {
 863                 pr_warn("queueing ieee80211 work while going to suspend\n");
 864                 return false;
 865         }
 866
 867         return true;
 868 }
 869
 870 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 871 {
 872         struct ieee80211_local *local = hw_to_local(hw);
 873
 874         if (!ieee80211_can_queue_work(local))
 875                 return;
 876
 877         queue_work(local->workqueue, work);
 878 }
 879 EXPORT_SYMBOL(ieee80211_queue_work);
 880
 881 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 882                                   struct delayed_work *dwork,
 883                                   unsigned long delay)
 884 {
 885         struct ieee80211_local *local = hw_to_local(hw);
 886
 887         if (!ieee80211_can_queue_work(local))
 888                 return;
 889
 890         queue_delayed_work(local->workqueue, dwork, delay);
 891 }
 892 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 893
 894 static u32
 895 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 896                             struct ieee802_11_elems *elems,
 897                             u64 filter, u32 crc,
 898                             const struct element *check_inherit)
 899 {
 900         const struct element *elem;
 901         bool calc_crc = filter != 0;
 902         DECLARE_BITMAP(seen_elems, 256);
 903         const u8 *ie;
 904
 905         bitmap_zero(seen_elems, 256);
 906
 907         for_each_element(elem, start, len) {
 908                 bool elem_parse_failed;
 909                 u8 id = elem->id;
 910                 u8 elen = elem->datalen;
 911                 const u8 *pos = elem->data;
 912
 913                 if (check_inherit &&
 914                     !cfg80211_is_element_inherited(elem,
 915                                                    check_inherit))
 916                         continue;
 917
 918                 switch (id) {
 919                 case WLAN_EID_SSID:
 920                 case WLAN_EID_SUPP_RATES:
 921                 case WLAN_EID_FH_PARAMS:
 922                 case WLAN_EID_DS_PARAMS:
 923                 case WLAN_EID_CF_PARAMS:
 924                 case WLAN_EID_TIM:
 925                 case WLAN_EID_IBSS_PARAMS:
 926                 case WLAN_EID_CHALLENGE:
 927                 case WLAN_EID_RSN:
 928                 case WLAN_EID_ERP_INFO:
 929                 case WLAN_EID_EXT_SUPP_RATES:
 930                 case WLAN_EID_HT_CAPABILITY:
 931                 case WLAN_EID_HT_OPERATION:
 932                 case WLAN_EID_VHT_CAPABILITY:
 933                 case WLAN_EID_VHT_OPERATION:
 934                 case WLAN_EID_MESH_ID:
 935                 case WLAN_EID_MESH_CONFIG:
 936                 case WLAN_EID_PEER_MGMT:
 937                 case WLAN_EID_PREQ:
 938                 case WLAN_EID_PREP:
 939                 case WLAN_EID_PERR:
 940                 case WLAN_EID_RANN:
 941                 case WLAN_EID_CHANNEL_SWITCH:
 942                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 943                 case WLAN_EID_COUNTRY:
 944                 case WLAN_EID_PWR_CONSTRAINT:
 945                 case WLAN_EID_TIMEOUT_INTERVAL:
 946                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 947                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 948                 case WLAN_EID_CHAN_SWITCH_PARAM:
 949                 case WLAN_EID_EXT_CAPABILITY:
 950                 case WLAN_EID_CHAN_SWITCH_TIMING:
 951                 case WLAN_EID_LINK_ID:
 952                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 953                 /*
 954                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 955                  * that if the content gets bigger it might be needed more than once
 956                  */
 957                         if (test_bit(id, seen_elems)) {
 958                                 elems->parse_error = true;
 959                                 continue;
 960                         }
 961                         break;
 962                 }
 963
 964                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 965                         crc = crc32_be(crc, pos - 2, elen + 2);
 966
 967                 elem_parse_failed = false;
 968
 969                 switch (id) {
 970                 case WLAN_EID_LINK_ID:
 971                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 972                                 elem_parse_failed = true;
 973                                 break;
 974                         }
 975                         elems->lnk_id = (void *)(pos - 2);
 976                         break;
 977                 case WLAN_EID_CHAN_SWITCH_TIMING:
 978                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 979                                 elem_parse_failed = true;
 980                                 break;
 981                         }
 982                         elems->ch_sw_timing = (void *)pos;
 983                         break;
 984                 case WLAN_EID_EXT_CAPABILITY:
 985                         elems->ext_capab = pos;
 986                         elems->ext_capab_len = elen;
 987                         break;
 988                 case WLAN_EID_SSID:
 989                         elems->ssid = pos;
 990                         elems->ssid_len = elen;
 991                         break;
 992                 case WLAN_EID_SUPP_RATES:
 993                         elems->supp_rates = pos;
 994                         elems->supp_rates_len = elen;
 995                         break;
 996                 case WLAN_EID_DS_PARAMS:
 997                         if (elen >= 1)
 998                                 elems->ds_params = pos;
 999                         else
1000                                 elem_parse_failed = true;
1001                         break;
1002                 case WLAN_EID_TIM:
1003                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1004                                 elems->tim = (void *)pos;
1005                                 elems->tim_len = elen;
1006                         } else
1007                                 elem_parse_failed = true;
1008                         break;
1009                 case WLAN_EID_CHALLENGE:
1010                         elems->challenge = pos;
1011                         elems->challenge_len = elen;
1012                         break;
1013                 case WLAN_EID_VENDOR_SPECIFIC:
1014                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1015                             pos[2] == 0xf2) {
1016                                 /* Microsoft OUI (00:50:F2) */
1017
1018                                 if (calc_crc)
1019                                         crc = crc32_be(crc, pos - 2, elen + 2);
1020
1021                                 if (elen >= 5 && pos[3] == 2) {
1022                                         /* OUI Type 2 - WMM IE */
1023                                         if (pos[4] == 0) {
1024                                                 elems->wmm_info = pos;
1025                                                 elems->wmm_info_len = elen;
1026                                         } else if (pos[4] == 1) {
1027                                                 elems->wmm_param = pos;
1028                                                 elems->wmm_param_len = elen;
1029                                         }
1030                                 }
1031                         }
1032                         break;
1033                 case WLAN_EID_RSN:
1034                         elems->rsn = pos;
1035                         elems->rsn_len = elen;
1036                         break;
1037                 case WLAN_EID_ERP_INFO:
1038                         if (elen >= 1)
1039                                 elems->erp_info = pos;
1040                         else
1041                                 elem_parse_failed = true;
1042                         break;
1043                 case WLAN_EID_EXT_SUPP_RATES:
1044                         elems->ext_supp_rates = pos;
1045                         elems->ext_supp_rates_len = elen;
1046                         break;
1047                 case WLAN_EID_HT_CAPABILITY:
1048                         if (elen >= sizeof(struct ieee80211_ht_cap))
1049                                 elems->ht_cap_elem = (void *)pos;
1050                         else
1051                                 elem_parse_failed = true;
1052                         break;
1053                 case WLAN_EID_HT_OPERATION:
1054                         if (elen >= sizeof(struct ieee80211_ht_operation))
1055                                 elems->ht_operation = (void *)pos;
1056                         else
1057                                 elem_parse_failed = true;
1058                         break;
1059                 case WLAN_EID_VHT_CAPABILITY:
1060                         if (elen >= sizeof(struct ieee80211_vht_cap))
1061                                 elems->vht_cap_elem = (void *)pos;
1062                         else
1063                                 elem_parse_failed = true;
1064                         break;
1065                 case WLAN_EID_VHT_OPERATION:
1066                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1067                                 elems->vht_operation = (void *)pos;
1068                                 if (calc_crc)
1069                                         crc = crc32_be(crc, pos - 2, elen + 2);
1070                                 break;
1071                         }
1072                         elem_parse_failed = true;
1073                         break;
1074                 case WLAN_EID_OPMODE_NOTIF:
1075                         if (elen > 0) {
1076                                 elems->opmode_notif = pos;
1077                                 if (calc_crc)
1078                                         crc = crc32_be(crc, pos - 2, elen + 2);
1079                                 break;
1080                         }
1081                         elem_parse_failed = true;
1082                         break;
1083                 case WLAN_EID_MESH_ID:
1084                         elems->mesh_id = pos;
1085                         elems->mesh_id_len = elen;
1086                         break;
1087                 case WLAN_EID_MESH_CONFIG:
1088                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1089                                 elems->mesh_config = (void *)pos;
1090                         else
1091                                 elem_parse_failed = true;
1092                         break;
1093                 case WLAN_EID_PEER_MGMT:
1094                         elems->peering = pos;
1095                         elems->peering_len = elen;
1096                         break;
1097                 case WLAN_EID_MESH_AWAKE_WINDOW:
1098                         if (elen >= 2)
1099                                 elems->awake_window = (void *)pos;
1100                         break;
1101                 case WLAN_EID_PREQ:
1102                         elems->preq = pos;
1103                         elems->preq_len = elen;
1104                         break;
1105                 case WLAN_EID_PREP:
1106                         elems->prep = pos;
1107                         elems->prep_len = elen;
1108                         break;
1109                 case WLAN_EID_PERR:
1110                         elems->perr = pos;
1111                         elems->perr_len = elen;
1112                         break;
1113                 case WLAN_EID_RANN:
1114                         if (elen >= sizeof(struct ieee80211_rann_ie))
1115                                 elems->rann = (void *)pos;
1116                         else
1117                                 elem_parse_failed = true;
1118                         break;
1119                 case WLAN_EID_CHANNEL_SWITCH:
1120                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1121                                 elem_parse_failed = true;
1122                                 break;
1123                         }
1124                         elems->ch_switch_ie = (void *)pos;
1125                         break;
1126                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1127                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1128                                 elem_parse_failed = true;
1129                                 break;
1130                         }
1131                         elems->ext_chansw_ie = (void *)pos;
1132                         break;
1133                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1134                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1135                                 elem_parse_failed = true;
1136                                 break;
1137                         }
1138                         elems->sec_chan_offs = (void *)pos;
1139                         break;
1140                 case WLAN_EID_CHAN_SWITCH_PARAM:
1141                         if (elen !=
1142                             sizeof(*elems->mesh_chansw_params_ie)) {
1143                                 elem_parse_failed = true;
1144                                 break;
1145                         }
1146                         elems->mesh_chansw_params_ie = (void *)pos;
1147                         break;
1148                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1149                         if (!action ||
1150                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1151                                 elem_parse_failed = true;
1152                                 break;
1153                         }
1154                         elems->wide_bw_chansw_ie = (void *)pos;
1155                         break;
1156                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1157                         if (action) {
1158                                 elem_parse_failed = true;
1159                                 break;
1160                         }
1161                         /*
1162                          * This is a bit tricky, but as we only care about
1163                          * the wide bandwidth channel switch element, so
1164                          * just parse it out manually.
1165                          */
1166                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1167                                               pos, elen);
1168                         if (ie) {
1169                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1170                                         elems->wide_bw_chansw_ie =
1171                                                 (void *)(ie + 2);
1172                                 else
1173                                         elem_parse_failed = true;
1174                         }
1175                         break;
1176                 case WLAN_EID_COUNTRY:
1177                         elems->country_elem = pos;
1178                         elems->country_elem_len = elen;
1179                         break;
1180                 case WLAN_EID_PWR_CONSTRAINT:
1181                         if (elen != 1) {
1182                                 elem_parse_failed = true;
1183                                 break;
1184                         }
1185                         elems->pwr_constr_elem = pos;
1186                         break;
1187                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1188                         /* Lots of different options exist, but we only care
1189                          * about the Dynamic Transmit Power Control element.
1190                          * First check for the Cisco OUI, then for the DTPC
1191                          * tag (0x00).
1192                          */
1193                         if (elen < 4) {
1194                                 elem_parse_failed = true;
1195                                 break;
1196                         }
1197
1198                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1199                             pos[2] != 0x96 || pos[3] != 0x00)
1200                                 break;
1201
1202                         if (elen != 6) {
1203                                 elem_parse_failed = true;
1204                                 break;
1205                         }
1206
1207                         if (calc_crc)
1208                                 crc = crc32_be(crc, pos - 2, elen + 2);
1209
1210                         elems->cisco_dtpc_elem = pos;
1211                         break;
1212                 case WLAN_EID_ADDBA_EXT:
1213                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1214                                 elem_parse_failed = true;
1215                                 break;
1216                         }
1217                         elems->addba_ext_ie = (void *)pos;
1218                         break;
1219                 case WLAN_EID_TIMEOUT_INTERVAL:
1220                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1221                                 elems->timeout_int = (void *)pos;
1222                         else
1223                                 elem_parse_failed = true;
1224                         break;
1225                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1226                         if (elen >= sizeof(*elems->max_idle_period_ie))
1227                                 elems->max_idle_period_ie = (void *)pos;
1228                         break;
1229                 case WLAN_EID_EXTENSION:
1230                         if (!elen)
1231                                 break;
1232                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1233                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1234                                 elems->mu_edca_param_set = (void *)&pos[1];
1235                                 if (calc_crc)
1236                                         crc = crc32_be(crc, pos - 2, elen + 2);
1237                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1238                                 elems->he_cap = (void *)&pos[1];
1239                                 elems->he_cap_len = elen - 1;
1240                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1241                                    elen >= sizeof(*elems->he_operation) &&
1242                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1243                                 elems->he_operation = (void *)&pos[1];
1244                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1245                                 elems->uora_element = (void *)&pos[1];
1246                         } else if (pos[0] ==
1247                                    WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1248                                    elen == 4) {
1249                                 elems->max_channel_switch_time = pos + 1;
1250                         } else if (pos[0] ==
1251                                    WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1252                                    elen == 3) {
1253                                 elems->mbssid_config_ie = (void *)&pos[1];
1254                         } else if (pos[0] == WLAN_EID_EXT_HE_SPR &&
1255                                    elen >= sizeof(*elems->he_spr) &&
1256                                    elen >= ieee80211_he_spr_size(&pos[1])) {
1257                                 elems->he_spr = (void *)&pos[1];
1258                         }
1259                         break;
1260                 default:
1261                         break;
1262                 }
1263
1264                 if (elem_parse_failed)
1265                         elems->parse_error = true;
1266                 else
1267                         __set_bit(id, seen_elems);
1268         }
1269
1270         if (!for_each_element_completed(elem, start, len))
1271                 elems->parse_error = true;
1272
1273         return crc;
1274 }
1275
1276 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1277                                             struct ieee802_11_elems *elems,
1278                                             u8 *transmitter_bssid,
1279                                             u8 *bss_bssid,
1280                                             u8 *nontransmitted_profile)
1281 {
1282         const struct element *elem, *sub;
1283         size_t profile_len = 0;
1284         bool found = false;
1285
1286         if (!bss_bssid || !transmitter_bssid)
1287                 return profile_len;
1288
1289         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1290                 if (elem->datalen < 2)
1291                         continue;
1292
1293                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1294                         u8 new_bssid[ETH_ALEN];
1295                         const u8 *index;
1296
1297                         if (sub->id != 0 || sub->datalen < 4) {
1298                                 /* not a valid BSS profile */
1299                                 continue;
1300                         }
1301
1302                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1303                             sub->data[1] != 2) {
1304                                 /* The first element of the
1305                                  * Nontransmitted BSSID Profile is not
1306                                  * the Nontransmitted BSSID Capability
1307                                  * element.
1308                                  */
1309                                 continue;
1310                         }
1311
1312                         memset(nontransmitted_profile, 0, len);
1313                         profile_len = cfg80211_merge_profile(start, len,
1314                                                              elem,
1315                                                              sub,
1316                                                              nontransmitted_profile,
1317                                                              len);
1318
1319                         /* found a Nontransmitted BSSID Profile */
1320                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1321                                                  nontransmitted_profile,
1322                                                  profile_len);
1323                         if (!index || index[1] < 1 || index[2] == 0) {
1324                                 /* Invalid MBSSID Index element */
1325                                 continue;
1326                         }
1327
1328                         cfg80211_gen_new_bssid(transmitter_bssid,
1329                                                elem->data[0],
1330                                                index[2],
1331                                                new_bssid);
1332                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1333                                 found = true;
1334                                 elems->bssid_index_len = index[1];
1335                                 elems->bssid_index = (void *)&index[2];
1336                                 break;
1337                         }
1338                 }
1339         }
1340
1341         return found ? profile_len : 0;
1342 }
1343
1344 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1345                                struct ieee802_11_elems *elems,
1346                                u64 filter, u32 crc, u8 *transmitter_bssid,
1347                                u8 *bss_bssid)
1348 {
1349         const struct element *non_inherit = NULL;
1350         u8 *nontransmitted_profile;
1351         int nontransmitted_profile_len = 0;
1352
1353         memset(elems, 0, sizeof(*elems));
1354         elems->ie_start = start;
1355         elems->total_len = len;
1356
1357         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1358         if (nontransmitted_profile) {
1359                 nontransmitted_profile_len =
1360                         ieee802_11_find_bssid_profile(start, len, elems,
1361                                                       transmitter_bssid,
1362                                                       bss_bssid,
1363                                                       nontransmitted_profile);
1364                 non_inherit =
1365                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1366                                                nontransmitted_profile,
1367                                                nontransmitted_profile_len);
1368         }
1369
1370         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1371                                           crc, non_inherit);
1372
1373         /* Override with nontransmitted profile, if found */
1374         if (nontransmitted_profile_len)
1375                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1376                                             nontransmitted_profile_len,
1377                                             action, elems, 0, 0, NULL);
1378
1379         if (elems->tim && !elems->parse_error) {
1380                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1381
1382                 elems->dtim_period = tim_ie->dtim_period;
1383                 elems->dtim_count = tim_ie->dtim_count;
1384         }
1385
1386         /* Override DTIM period and count if needed */
1387         if (elems->bssid_index &&
1388             elems->bssid_index_len >=
1389             offsetofend(struct ieee80211_bssid_index, dtim_period))
1390                 elems->dtim_period = elems->bssid_index->dtim_period;
1391
1392         if (elems->bssid_index &&
1393             elems->bssid_index_len >=
1394             offsetofend(struct ieee80211_bssid_index, dtim_count))
1395                 elems->dtim_count = elems->bssid_index->dtim_count;
1396
1397         kfree(nontransmitted_profile);
1398
1399         return crc;
1400 }
1401
1402 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1403                                            struct ieee80211_tx_queue_params
1404                                            *qparam, int ac)
1405 {
1406         struct ieee80211_chanctx_conf *chanctx_conf;
1407         const struct ieee80211_reg_rule *rrule;
1408         const struct ieee80211_wmm_ac *wmm_ac;
1409         u16 center_freq = 0;
1410
1411         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1412             sdata->vif.type != NL80211_IFTYPE_STATION)
1413                 return;
1414
1415         rcu_read_lock();
1416         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1417         if (chanctx_conf)
1418                 center_freq = chanctx_conf->def.chan->center_freq;
1419
1420         if (!center_freq) {
1421                 rcu_read_unlock();
1422                 return;
1423         }
1424
1425         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1426
1427         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1428                 rcu_read_unlock();
1429                 return;
1430         }
1431
1432         if (sdata->vif.type == NL80211_IFTYPE_AP)
1433                 wmm_ac = &rrule->wmm_rule.ap[ac];
1434         else
1435                 wmm_ac = &rrule->wmm_rule.client[ac];
1436         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1437         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1438         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1439         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1440         rcu_read_unlock();
1441 }
1442
1443 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1444                                bool bss_notify, bool enable_qos)
1445 {
1446         struct ieee80211_local *local = sdata->local;
1447         struct ieee80211_tx_queue_params qparam;
1448         struct ieee80211_chanctx_conf *chanctx_conf;
1449         int ac;
1450         bool use_11b;
1451         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1452         int aCWmin, aCWmax;
1453
1454         if (!local->ops->conf_tx)
1455                 return;
1456
1457         if (local->hw.queues < IEEE80211_NUM_ACS)
1458                 return;
1459
1460         memset(&qparam, 0, sizeof(qparam));
1461
1462         rcu_read_lock();
1463         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1464         use_11b = (chanctx_conf &&
1465                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1466                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1467         rcu_read_unlock();
1468
1469         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1470
1471         /* Set defaults according to 802.11-2007 Table 7-37 */
1472         aCWmax = 1023;
1473         if (use_11b)
1474                 aCWmin = 31;
1475         else
1476                 aCWmin = 15;
1477
1478         /* Confiure old 802.11b/g medium access rules. */
1479         qparam.cw_max = aCWmax;
1480         qparam.cw_min = aCWmin;
1481         qparam.txop = 0;
1482         qparam.aifs = 2;
1483
1484         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1485                 /* Update if QoS is enabled. */
1486                 if (enable_qos) {
1487                         switch (ac) {
1488                         case IEEE80211_AC_BK:
1489                                 qparam.cw_max = aCWmax;
1490                                 qparam.cw_min = aCWmin;
1491                                 qparam.txop = 0;
1492                                 if (is_ocb)
1493                                         qparam.aifs = 9;
1494                                 else
1495                                         qparam.aifs = 7;
1496                                 break;
1497                         /* never happens but let's not leave undefined */
1498                         default:
1499                         case IEEE80211_AC_BE:
1500                                 qparam.cw_max = aCWmax;
1501                                 qparam.cw_min = aCWmin;
1502                                 qparam.txop = 0;
1503                                 if (is_ocb)
1504                                         qparam.aifs = 6;
1505                                 else
1506                                         qparam.aifs = 3;
1507                                 break;
1508                         case IEEE80211_AC_VI:
1509                                 qparam.cw_max = aCWmin;
1510                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1511                                 if (is_ocb)
1512                                         qparam.txop = 0;
1513                                 else if (use_11b)
1514                                         qparam.txop = 6016/32;
1515                                 else
1516                                         qparam.txop = 3008/32;
1517
1518                                 if (is_ocb)
1519                                         qparam.aifs = 3;
1520                                 else
1521                                         qparam.aifs = 2;
1522                                 break;
1523                         case IEEE80211_AC_VO:
1524                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1525                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1526                                 if (is_ocb)
1527                                         qparam.txop = 0;
1528                                 else if (use_11b)
1529                                         qparam.txop = 3264/32;
1530                                 else
1531                                         qparam.txop = 1504/32;
1532                                 qparam.aifs = 2;
1533                                 break;
1534                         }
1535                 }
1536                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1537
1538                 qparam.uapsd = false;
1539
1540                 sdata->tx_conf[ac] = qparam;
1541                 drv_conf_tx(local, sdata, ac, &qparam);
1542         }
1543
1544         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1545             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1546             sdata->vif.type != NL80211_IFTYPE_NAN) {
1547                 sdata->vif.bss_conf.qos = enable_qos;
1548                 if (bss_notify)
1549                         ieee80211_bss_info_change_notify(sdata,
1550                                                          BSS_CHANGED_QOS);
1551         }
1552 }
1553
1554 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1555                          u16 transaction, u16 auth_alg, u16 status,
1556                          const u8 *extra, size_t extra_len, const u8 *da,
1557                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1558                          u32 tx_flags)
1559 {
1560         struct ieee80211_local *local = sdata->local;
1561         struct sk_buff *skb;
1562         struct ieee80211_mgmt *mgmt;
1563         int err;
1564
1565         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1566         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1567                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1568         if (!skb)
1569                 return;
1570
1571         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1572
1573         mgmt = skb_put_zero(skb, 24 + 6);
1574         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1575                                           IEEE80211_STYPE_AUTH);
1576         memcpy(mgmt->da, da, ETH_ALEN);
1577         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1578         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1579         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1580         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1581         mgmt->u.auth.status_code = cpu_to_le16(status);
1582         if (extra)
1583                 skb_put_data(skb, extra, extra_len);
1584
1585         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1586                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1587                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1588                 WARN_ON(err);
1589         }
1590
1591         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1592                                         tx_flags;
1593         ieee80211_tx_skb(sdata, skb);
1594 }
1595
1596 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1597                                     const u8 *da, const u8 *bssid,
1598                                     u16 stype, u16 reason,
1599                                     bool send_frame, u8 *frame_buf)
1600 {
1601         struct ieee80211_local *local = sdata->local;
1602         struct sk_buff *skb;
1603         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1604
1605         /* build frame */
1606         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1607         mgmt->duration = 0; /* initialize only */
1608         mgmt->seq_ctrl = 0; /* initialize only */
1609         memcpy(mgmt->da, da, ETH_ALEN);
1610         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1611         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1612         /* u.deauth.reason_code == u.disassoc.reason_code */
1613         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1614
1615         if (send_frame) {
1616                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1617                                     IEEE80211_DEAUTH_FRAME_LEN);
1618                 if (!skb)
1619                         return;
1620
1621                 skb_reserve(skb, local->hw.extra_tx_headroom);
1622
1623                 /* copy in frame */
1624                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1625
1626                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1627                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1628                         IEEE80211_SKB_CB(skb)->flags |=
1629                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1630
1631                 ieee80211_tx_skb(sdata, skb);
1632         }
1633 }
1634
1635 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1636                                          u8 *buffer, size_t buffer_len,
1637                                          const u8 *ie, size_t ie_len,
1638                                          enum nl80211_band band,
1639                                          u32 rate_mask,
1640                                          struct cfg80211_chan_def *chandef,
1641                                          size_t *offset, u32 flags)
1642 {
1643         struct ieee80211_supported_band *sband;
1644         const struct ieee80211_sta_he_cap *he_cap;
1645         u8 *pos = buffer, *end = buffer + buffer_len;
1646         size_t noffset;
1647         int supp_rates_len, i;
1648         u8 rates[32];
1649         int num_rates;
1650         int ext_rates_len;
1651         int shift;
1652         u32 rate_flags;
1653         bool have_80mhz = false;
1654
1655         *offset = 0;
1656
1657         sband = local->hw.wiphy->bands[band];
1658         if (WARN_ON_ONCE(!sband))
1659                 return 0;
1660
1661         rate_flags = ieee80211_chandef_rate_flags(chandef);
1662         shift = ieee80211_chandef_get_shift(chandef);
1663
1664         num_rates = 0;
1665         for (i = 0; i < sband->n_bitrates; i++) {
1666                 if ((BIT(i) & rate_mask) == 0)
1667                         continue; /* skip rate */
1668                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1669                         continue;
1670
1671                 rates[num_rates++] =
1672                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1673                                           (1 << shift) * 5);
1674         }
1675
1676         supp_rates_len = min_t(int, num_rates, 8);
1677
1678         if (end - pos < 2 + supp_rates_len)
1679                 goto out_err;
1680         *pos++ = WLAN_EID_SUPP_RATES;
1681         *pos++ = supp_rates_len;
1682         memcpy(pos, rates, supp_rates_len);
1683         pos += supp_rates_len;
1684
1685         /* insert "request information" if in custom IEs */
1686         if (ie && ie_len) {
1687                 static const u8 before_extrates[] = {
1688                         WLAN_EID_SSID,
1689                         WLAN_EID_SUPP_RATES,
1690                         WLAN_EID_REQUEST,
1691                 };
1692                 noffset = ieee80211_ie_split(ie, ie_len,
1693                                              before_extrates,
1694                                              ARRAY_SIZE(before_extrates),
1695                                              *offset);
1696                 if (end - pos < noffset - *offset)
1697                         goto out_err;
1698                 memcpy(pos, ie + *offset, noffset - *offset);
1699                 pos += noffset - *offset;
1700                 *offset = noffset;
1701         }
1702
1703         ext_rates_len = num_rates - supp_rates_len;
1704         if (ext_rates_len > 0) {
1705                 if (end - pos < 2 + ext_rates_len)
1706                         goto out_err;
1707                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1708                 *pos++ = ext_rates_len;
1709                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1710                 pos += ext_rates_len;
1711         }
1712
1713         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1714                 if (end - pos < 3)
1715                         goto out_err;
1716                 *pos++ = WLAN_EID_DS_PARAMS;
1717                 *pos++ = 1;
1718                 *pos++ = ieee80211_frequency_to_channel(
1719                                 chandef->chan->center_freq);
1720         }
1721
1722         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1723                 goto done;
1724
1725         /* insert custom IEs that go before HT */
1726         if (ie && ie_len) {
1727                 static const u8 before_ht[] = {
1728                         /*
1729                          * no need to list the ones split off already
1730                          * (or generated here)
1731                          */
1732                         WLAN_EID_DS_PARAMS,
1733                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1734                 };
1735                 noffset = ieee80211_ie_split(ie, ie_len,
1736                                              before_ht, ARRAY_SIZE(before_ht),
1737                                              *offset);
1738                 if (end - pos < noffset - *offset)
1739                         goto out_err;
1740                 memcpy(pos, ie + *offset, noffset - *offset);
1741                 pos += noffset - *offset;
1742                 *offset = noffset;
1743         }
1744
1745         if (sband->ht_cap.ht_supported) {
1746                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1747                         goto out_err;
1748                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1749                                                 sband->ht_cap.cap);
1750         }
1751
1752         /* insert custom IEs that go before VHT */
1753         if (ie && ie_len) {
1754                 static const u8 before_vht[] = {
1755                         /*
1756                          * no need to list the ones split off already
1757                          * (or generated here)
1758                          */
1759                         WLAN_EID_BSS_COEX_2040,
1760                         WLAN_EID_EXT_CAPABILITY,
1761                         WLAN_EID_SSID_LIST,
1762                         WLAN_EID_CHANNEL_USAGE,
1763                         WLAN_EID_INTERWORKING,
1764                         WLAN_EID_MESH_ID,
1765                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1766                 };
1767                 noffset = ieee80211_ie_split(ie, ie_len,
1768                                              before_vht, ARRAY_SIZE(before_vht),
1769                                              *offset);
1770                 if (end - pos < noffset - *offset)
1771                         goto out_err;
1772                 memcpy(pos, ie + *offset, noffset - *offset);
1773                 pos += noffset - *offset;
1774                 *offset = noffset;
1775         }
1776
1777         /* Check if any channel in this sband supports at least 80 MHz */
1778         for (i = 0; i < sband->n_channels; i++) {
1779                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1780                                                 IEEE80211_CHAN_NO_80MHZ))
1781                         continue;
1782
1783                 have_80mhz = true;
1784                 break;
1785         }
1786
1787         if (sband->vht_cap.vht_supported && have_80mhz) {
1788                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1789                         goto out_err;
1790                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1791                                                  sband->vht_cap.cap);
1792         }
1793
1794         /* insert custom IEs that go before HE */
1795         if (ie && ie_len) {
1796                 static const u8 before_he[] = {
1797                         /*
1798                          * no need to list the ones split off before VHT
1799                          * or generated here
1800                          */
1801                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1802                         WLAN_EID_AP_CSN,
1803                         /* TODO: add 11ah/11aj/11ak elements */
1804                 };
1805                 noffset = ieee80211_ie_split(ie, ie_len,
1806                                              before_he, ARRAY_SIZE(before_he),
1807                                              *offset);
1808                 if (end - pos < noffset - *offset)
1809                         goto out_err;
1810                 memcpy(pos, ie + *offset, noffset - *offset);
1811                 pos += noffset - *offset;
1812                 *offset = noffset;
1813         }
1814
1815         he_cap = ieee80211_get_he_sta_cap(sband);
1816         if (he_cap) {
1817                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1818                 if (!pos)
1819                         goto out_err;
1820         }
1821
1822         /*
1823          * If adding more here, adjust code in main.c
1824          * that calculates local->scan_ies_len.
1825          */
1826
1827         return pos - buffer;
1828  out_err:
1829         WARN_ONCE(1, "not enough space for preq IEs\n");
1830  done:
1831         return pos - buffer;
1832 }
1833
1834 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1835                              size_t buffer_len,
1836                              struct ieee80211_scan_ies *ie_desc,
1837                              const u8 *ie, size_t ie_len,
1838                              u8 bands_used, u32 *rate_masks,
1839                              struct cfg80211_chan_def *chandef,
1840                              u32 flags)
1841 {
1842         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1843         int i;
1844
1845         memset(ie_desc, 0, sizeof(*ie_desc));
1846
1847         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1848                 if (bands_used & BIT(i)) {
1849                         pos += ieee80211_build_preq_ies_band(local,
1850                                                              buffer + pos,
1851                                                              buffer_len - pos,
1852                                                              ie, ie_len, i,
1853                                                              rate_masks[i],
1854                                                              chandef,
1855                                                              &custom_ie_offset,
1856                                                              flags);
1857                         ie_desc->ies[i] = buffer + old_pos;
1858                         ie_desc->len[i] = pos - old_pos;
1859                         old_pos = pos;
1860                 }
1861         }
1862
1863         /* add any remaining custom IEs */
1864         if (ie && ie_len) {
1865                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1866                               "not enough space for preq custom IEs\n"))
1867                         return pos;
1868                 memcpy(buffer + pos, ie + custom_ie_offset,
1869                        ie_len - custom_ie_offset);
1870                 ie_desc->common_ies = buffer + pos;
1871                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1872                 pos += ie_len - custom_ie_offset;
1873         }
1874
1875         return pos;
1876 };
1877
1878 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1879                                           const u8 *src, const u8 *dst,
1880                                           u32 ratemask,
1881                                           struct ieee80211_channel *chan,
1882                                           const u8 *ssid, size_t ssid_len,
1883                                           const u8 *ie, size_t ie_len,
1884                                           u32 flags)
1885 {
1886         struct ieee80211_local *local = sdata->local;
1887         struct cfg80211_chan_def chandef;
1888         struct sk_buff *skb;
1889         struct ieee80211_mgmt *mgmt;
1890         int ies_len;
1891         u32 rate_masks[NUM_NL80211_BANDS] = {};
1892         struct ieee80211_scan_ies dummy_ie_desc;
1893
1894         /*
1895          * Do not send DS Channel parameter for directed probe requests
1896          * in order to maximize the chance that we get a response.  Some
1897          * badly-behaved APs don't respond when this parameter is included.
1898          */
1899         chandef.width = sdata->vif.bss_conf.chandef.width;
1900         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1901                 chandef.chan = NULL;
1902         else
1903                 chandef.chan = chan;
1904
1905         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1906                                      100 + ie_len);
1907         if (!skb)
1908                 return NULL;
1909
1910         rate_masks[chan->band] = ratemask;
1911         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1912                                            skb_tailroom(skb), &dummy_ie_desc,
1913                                            ie, ie_len, BIT(chan->band),
1914                                            rate_masks, &chandef, flags);
1915         skb_put(skb, ies_len);
1916
1917         if (dst) {
1918                 mgmt = (struct ieee80211_mgmt *) skb->data;
1919                 memcpy(mgmt->da, dst, ETH_ALEN);
1920                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1921         }
1922
1923         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1924
1925         return skb;
1926 }
1927
1928 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1929                             struct ieee802_11_elems *elems,
1930                             enum nl80211_band band, u32 *basic_rates)
1931 {
1932         struct ieee80211_supported_band *sband;
1933         size_t num_rates;
1934         u32 supp_rates, rate_flags;
1935         int i, j, shift;
1936
1937         sband = sdata->local->hw.wiphy->bands[band];
1938         if (WARN_ON(!sband))
1939                 return 1;
1940
1941         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1942         shift = ieee80211_vif_get_shift(&sdata->vif);
1943
1944         num_rates = sband->n_bitrates;
1945         supp_rates = 0;
1946         for (i = 0; i < elems->supp_rates_len +
1947                      elems->ext_supp_rates_len; i++) {
1948                 u8 rate = 0;
1949                 int own_rate;
1950                 bool is_basic;
1951                 if (i < elems->supp_rates_len)
1952                         rate = elems->supp_rates[i];
1953                 else if (elems->ext_supp_rates)
1954                         rate = elems->ext_supp_rates
1955                                 [i - elems->supp_rates_len];
1956                 own_rate = 5 * (rate & 0x7f);
1957                 is_basic = !!(rate & 0x80);
1958
1959                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1960                         continue;
1961
1962                 for (j = 0; j < num_rates; j++) {
1963                         int brate;
1964                         if ((rate_flags & sband->bitrates[j].flags)
1965                             != rate_flags)
1966                                 continue;
1967
1968                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1969                                              1 << shift);
1970
1971                         if (brate == own_rate) {
1972                                 supp_rates |= BIT(j);
1973                                 if (basic_rates && is_basic)
1974                                         *basic_rates |= BIT(j);
1975                         }
1976                 }
1977         }
1978         return supp_rates;
1979 }
1980
1981 void ieee80211_stop_device(struct ieee80211_local *local)
1982 {
1983         ieee80211_led_radio(local, false);
1984         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1985
1986         cancel_work_sync(&local->reconfig_filter);
1987
1988         flush_workqueue(local->workqueue);
1989         drv_stop(local);
1990 }
1991
1992 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1993                                            bool aborted)
1994 {
1995         /* It's possible that we don't handle the scan completion in
1996          * time during suspend, so if it's still marked as completed
1997          * here, queue the work and flush it to clean things up.
1998          * Instead of calling the worker function directly here, we
1999          * really queue it to avoid potential races with other flows
2000          * scheduling the same work.
2001          */
2002         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2003                 /* If coming from reconfiguration failure, abort the scan so
2004                  * we don't attempt to continue a partial HW scan - which is
2005                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2006                  * completed scan, and a 5 GHz portion is still pending.
2007                  */
2008                 if (aborted)
2009                         set_bit(SCAN_ABORTED, &local->scanning);
2010                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2011                 flush_delayed_work(&local->scan_work);
2012         }
2013 }
2014
2015 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2016 {
2017         struct ieee80211_sub_if_data *sdata;
2018         struct ieee80211_chanctx *ctx;
2019
2020         /*
2021          * We get here if during resume the device can't be restarted properly.
2022          * We might also get here if this happens during HW reset, which is a
2023          * slightly different situation and we need to drop all connections in
2024          * the latter case.
2025          *
2026          * Ask cfg80211 to turn off all interfaces, this will result in more
2027          * warnings but at least we'll then get into a clean stopped state.
2028          */
2029
2030         local->resuming = false;
2031         local->suspended = false;
2032         local->in_reconfig = false;
2033
2034         ieee80211_flush_completed_scan(local, true);
2035
2036         /* scheduled scan clearly can't be running any more, but tell
2037          * cfg80211 and clear local state
2038          */
2039         ieee80211_sched_scan_end(local);
2040
2041         list_for_each_entry(sdata, &local->interfaces, list)
2042                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2043
2044         /* Mark channel contexts as not being in the driver any more to avoid
2045          * removing them from the driver during the shutdown process...
2046          */
2047         mutex_lock(&local->chanctx_mtx);
2048         list_for_each_entry(ctx, &local->chanctx_list, list)
2049                 ctx->driver_present = false;
2050         mutex_unlock(&local->chanctx_mtx);
2051
2052         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2053 }
2054
2055 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2056                                      struct ieee80211_sub_if_data *sdata)
2057 {
2058         struct ieee80211_chanctx_conf *conf;
2059         struct ieee80211_chanctx *ctx;
2060
2061         if (!local->use_chanctx)
2062                 return;
2063
2064         mutex_lock(&local->chanctx_mtx);
2065         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2066                                          lockdep_is_held(&local->chanctx_mtx));
2067         if (conf) {
2068                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2069                 drv_assign_vif_chanctx(local, sdata, ctx);
2070         }
2071         mutex_unlock(&local->chanctx_mtx);
2072 }
2073
2074 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2075 {
2076         struct ieee80211_local *local = sdata->local;
2077         struct sta_info *sta;
2078
2079         /* add STAs back */
2080         mutex_lock(&local->sta_mtx);
2081         list_for_each_entry(sta, &local->sta_list, list) {
2082                 enum ieee80211_sta_state state;
2083
2084                 if (!sta->uploaded || sta->sdata != sdata)
2085                         continue;
2086
2087                 for (state = IEEE80211_STA_NOTEXIST;
2088                      state < sta->sta_state; state++)
2089                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2090                                               state + 1));
2091         }
2092         mutex_unlock(&local->sta_mtx);
2093 }
2094
2095 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2096 {
2097         struct cfg80211_nan_func *func, **funcs;
2098         int res, id, i = 0;
2099
2100         res = drv_start_nan(sdata->local, sdata,
2101                             &sdata->u.nan.conf);
2102         if (WARN_ON(res))
2103                 return res;
2104
2105         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2106                         sizeof(*funcs),
2107                         GFP_KERNEL);
2108         if (!funcs)
2109                 return -ENOMEM;
2110
2111         /* Add all the functions:
2112          * This is a little bit ugly. We need to call a potentially sleeping
2113          * callback for each NAN function, so we can't hold the spinlock.
2114          */
2115         spin_lock_bh(&sdata->u.nan.func_lock);
2116
2117         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2118                 funcs[i++] = func;
2119
2120         spin_unlock_bh(&sdata->u.nan.func_lock);
2121
2122         for (i = 0; funcs[i]; i++) {
2123                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2124                 if (WARN_ON(res))
2125                         ieee80211_nan_func_terminated(&sdata->vif,
2126                                                       funcs[i]->instance_id,
2127                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2128                                                       GFP_KERNEL);
2129         }
2130
2131         kfree(funcs);
2132
2133         return 0;
2134 }
2135
2136 int ieee80211_reconfig(struct ieee80211_local *local)
2137 {
2138         struct ieee80211_hw *hw = &local->hw;
2139         struct ieee80211_sub_if_data *sdata;
2140         struct ieee80211_chanctx *ctx;
2141         struct sta_info *sta;
2142         int res, i;
2143         bool reconfig_due_to_wowlan = false;
2144         struct ieee80211_sub_if_data *sched_scan_sdata;
2145         struct cfg80211_sched_scan_request *sched_scan_req;
2146         bool sched_scan_stopped = false;
2147         bool suspended = local->suspended;
2148
2149         /* nothing to do if HW shouldn't run */
2150         if (!local->open_count)
2151                 goto wake_up;
2152
2153 #ifdef CONFIG_PM
2154         if (suspended)
2155                 local->resuming = true;
2156
2157         if (local->wowlan) {
2158                 /*
2159                  * In the wowlan case, both mac80211 and the device
2160                  * are functional when the resume op is called, so
2161                  * clear local->suspended so the device could operate
2162                  * normally (e.g. pass rx frames).
2163                  */
2164                 local->suspended = false;
2165                 res = drv_resume(local);
2166                 local->wowlan = false;
2167                 if (res < 0) {
2168                         local->resuming = false;
2169                         return res;
2170                 }
2171                 if (res == 0)
2172                         goto wake_up;
2173                 WARN_ON(res > 1);
2174                 /*
2175                  * res is 1, which means the driver requested
2176                  * to go through a regular reset on wakeup.
2177                  * restore local->suspended in this case.
2178                  */
2179                 reconfig_due_to_wowlan = true;
2180                 local->suspended = true;
2181         }
2182 #endif
2183
2184         /*
2185          * In case of hw_restart during suspend (without wowlan),
2186          * cancel restart work, as we are reconfiguring the device
2187          * anyway.
2188          * Note that restart_work is scheduled on a frozen workqueue,
2189          * so we can't deadlock in this case.
2190          */
2191         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2192                 cancel_work_sync(&local->restart_work);
2193
2194         local->started = false;
2195
2196         /*
2197          * Upon resume hardware can sometimes be goofy due to
2198          * various platform / driver / bus issues, so restarting
2199          * the device may at times not work immediately. Propagate
2200          * the error.
2201          */
2202         res = drv_start(local);
2203         if (res) {
2204                 if (suspended)
2205                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2206                 else
2207                         WARN(1, "Hardware became unavailable during restart.\n");
2208                 ieee80211_handle_reconfig_failure(local);
2209                 return res;
2210         }
2211
2212         /* setup fragmentation threshold */
2213         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2214
2215         /* setup RTS threshold */
2216         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2217
2218         /* reset coverage class */
2219         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2220
2221         ieee80211_led_radio(local, true);
2222         ieee80211_mod_tpt_led_trig(local,
2223                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2224
2225         /* add interfaces */
2226         sdata = rtnl_dereference(local->monitor_sdata);
2227         if (sdata) {
2228                 /* in HW restart it exists already */
2229                 WARN_ON(local->resuming);
2230                 res = drv_add_interface(local, sdata);
2231                 if (WARN_ON(res)) {
2232                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2233                         synchronize_net();
2234                         kfree(sdata);
2235                 }
2236         }
2237
2238         list_for_each_entry(sdata, &local->interfaces, list) {
2239                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2240                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2241                     ieee80211_sdata_running(sdata)) {
2242                         res = drv_add_interface(local, sdata);
2243                         if (WARN_ON(res))
2244                                 break;
2245                 }
2246         }
2247
2248         /* If adding any of the interfaces failed above, roll back and
2249          * report failure.
2250          */
2251         if (res) {
2252                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2253                                                      list)
2254                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2255                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2256                             ieee80211_sdata_running(sdata))
2257                                 drv_remove_interface(local, sdata);
2258                 ieee80211_handle_reconfig_failure(local);
2259                 return res;
2260         }
2261
2262         /* add channel contexts */
2263         if (local->use_chanctx) {
2264                 mutex_lock(&local->chanctx_mtx);
2265                 list_for_each_entry(ctx, &local->chanctx_list, list)
2266                         if (ctx->replace_state !=
2267                             IEEE80211_CHANCTX_REPLACES_OTHER)
2268                                 WARN_ON(drv_add_chanctx(local, ctx));
2269                 mutex_unlock(&local->chanctx_mtx);
2270
2271                 sdata = rtnl_dereference(local->monitor_sdata);
2272                 if (sdata && ieee80211_sdata_running(sdata))
2273                         ieee80211_assign_chanctx(local, sdata);
2274         }
2275
2276         /* reconfigure hardware */
2277         ieee80211_hw_config(local, ~0);
2278
2279         ieee80211_configure_filter(local);
2280
2281         /* Finally also reconfigure all the BSS information */
2282         list_for_each_entry(sdata, &local->interfaces, list) {
2283                 u32 changed;
2284
2285                 if (!ieee80211_sdata_running(sdata))
2286                         continue;
2287
2288                 ieee80211_assign_chanctx(local, sdata);
2289
2290                 switch (sdata->vif.type) {
2291                 case NL80211_IFTYPE_AP_VLAN:
2292                 case NL80211_IFTYPE_MONITOR:
2293                         break;
2294                 case NL80211_IFTYPE_ADHOC:
2295                         if (sdata->vif.bss_conf.ibss_joined)
2296                                 WARN_ON(drv_join_ibss(local, sdata));
2297                         /* fall through */
2298                 default:
2299                         ieee80211_reconfig_stations(sdata);
2300                         /* fall through */
2301                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2302                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2303                                 drv_conf_tx(local, sdata, i,
2304                                             &sdata->tx_conf[i]);
2305                         break;
2306                 }
2307
2308                 /* common change flags for all interface types */
2309                 changed = BSS_CHANGED_ERP_CTS_PROT |
2310                           BSS_CHANGED_ERP_PREAMBLE |
2311                           BSS_CHANGED_ERP_SLOT |
2312                           BSS_CHANGED_HT |
2313                           BSS_CHANGED_BASIC_RATES |
2314                           BSS_CHANGED_BEACON_INT |
2315                           BSS_CHANGED_BSSID |
2316                           BSS_CHANGED_CQM |
2317                           BSS_CHANGED_QOS |
2318                           BSS_CHANGED_IDLE |
2319                           BSS_CHANGED_TXPOWER |
2320                           BSS_CHANGED_MCAST_RATE;
2321
2322                 if (sdata->vif.mu_mimo_owner)
2323                         changed |= BSS_CHANGED_MU_GROUPS;
2324
2325                 switch (sdata->vif.type) {
2326                 case NL80211_IFTYPE_STATION:
2327                         changed |= BSS_CHANGED_ASSOC |
2328                                    BSS_CHANGED_ARP_FILTER |
2329                                    BSS_CHANGED_PS;
2330
2331                         /* Re-send beacon info report to the driver */
2332                         if (sdata->u.mgd.have_beacon)
2333                                 changed |= BSS_CHANGED_BEACON_INFO;
2334
2335                         if (sdata->vif.bss_conf.max_idle_period ||
2336                             sdata->vif.bss_conf.protected_keep_alive)
2337                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2338
2339                         sdata_lock(sdata);
2340                         ieee80211_bss_info_change_notify(sdata, changed);
2341                         sdata_unlock(sdata);
2342                         break;
2343                 case NL80211_IFTYPE_OCB:
2344                         changed |= BSS_CHANGED_OCB;
2345                         ieee80211_bss_info_change_notify(sdata, changed);
2346                         break;
2347                 case NL80211_IFTYPE_ADHOC:
2348                         changed |= BSS_CHANGED_IBSS;
2349                         /* fall through */
2350                 case NL80211_IFTYPE_AP:
2351                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2352
2353                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2354                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2355                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2356                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2357
2358                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2359                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2360
2361                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2362                                         drv_start_ap(local, sdata);
2363                         }
2364
2365                         /* fall through */
2366                 case NL80211_IFTYPE_MESH_POINT:
2367                         if (sdata->vif.bss_conf.enable_beacon) {
2368                                 changed |= BSS_CHANGED_BEACON |
2369                                            BSS_CHANGED_BEACON_ENABLED;
2370                                 ieee80211_bss_info_change_notify(sdata, changed);
2371                         }
2372                         break;
2373                 case NL80211_IFTYPE_NAN:
2374                         res = ieee80211_reconfig_nan(sdata);
2375                         if (res < 0) {
2376                                 ieee80211_handle_reconfig_failure(local);
2377                                 return res;
2378                         }
2379                         break;
2380                 case NL80211_IFTYPE_WDS:
2381                 case NL80211_IFTYPE_AP_VLAN:
2382                 case NL80211_IFTYPE_MONITOR:
2383                 case NL80211_IFTYPE_P2P_DEVICE:
2384                         /* nothing to do */
2385                         break;
2386                 case NL80211_IFTYPE_UNSPECIFIED:
2387                 case NUM_NL80211_IFTYPES:
2388                 case NL80211_IFTYPE_P2P_CLIENT:
2389                 case NL80211_IFTYPE_P2P_GO:
2390                         WARN_ON(1);
2391                         break;
2392                 }
2393         }
2394
2395         ieee80211_recalc_ps(local);
2396
2397         /*
2398          * The sta might be in psm against the ap (e.g. because
2399          * this was the state before a hw restart), so we
2400          * explicitly send a null packet in order to make sure
2401          * it'll sync against the ap (and get out of psm).
2402          */
2403         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2404                 list_for_each_entry(sdata, &local->interfaces, list) {
2405                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2406                                 continue;
2407                         if (!sdata->u.mgd.associated)
2408                                 continue;
2409
2410                         ieee80211_send_nullfunc(local, sdata, false);
2411                 }
2412         }
2413
2414         /* APs are now beaconing, add back stations */
2415         mutex_lock(&local->sta_mtx);
2416         list_for_each_entry(sta, &local->sta_list, list) {
2417                 enum ieee80211_sta_state state;
2418
2419                 if (!sta->uploaded)
2420                         continue;
2421
2422                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2423                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2424                         continue;
2425
2426                 for (state = IEEE80211_STA_NOTEXIST;
2427                      state < sta->sta_state; state++)
2428                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2429                                               state + 1));
2430         }
2431         mutex_unlock(&local->sta_mtx);
2432
2433         /* add back keys */
2434         list_for_each_entry(sdata, &local->interfaces, list)
2435                 ieee80211_reenable_keys(sdata);
2436
2437         /* Reconfigure sched scan if it was interrupted by FW restart */
2438         mutex_lock(&local->mtx);
2439         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2440                                                 lockdep_is_held(&local->mtx));
2441         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2442                                                 lockdep_is_held(&local->mtx));
2443         if (sched_scan_sdata && sched_scan_req)
2444                 /*
2445                  * Sched scan stopped, but we don't want to report it. Instead,
2446                  * we're trying to reschedule. However, if more than one scan
2447                  * plan was set, we cannot reschedule since we don't know which
2448                  * scan plan was currently running (and some scan plans may have
2449                  * already finished).
2450                  */
2451                 if (sched_scan_req->n_scan_plans > 1 ||
2452                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2453                                                          sched_scan_req)) {
2454                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2455                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2456                         sched_scan_stopped = true;
2457                 }
2458         mutex_unlock(&local->mtx);
2459
2460         if (sched_scan_stopped)
2461                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2462
2463  wake_up:
2464
2465         if (local->monitors == local->open_count && local->monitors > 0)
2466                 ieee80211_add_virtual_monitor(local);
2467
2468         /*
2469          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2470          * sessions can be established after a resume.
2471          *
2472          * Also tear down aggregation sessions since reconfiguring
2473          * them in a hardware restart scenario is not easily done
2474          * right now, and the hardware will have lost information
2475          * about the sessions, but we and the AP still think they
2476          * are active. This is really a workaround though.
2477          */
2478         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2479                 mutex_lock(&local->sta_mtx);
2480
2481                 list_for_each_entry(sta, &local->sta_list, list) {
2482                         if (!local->resuming)
2483                                 ieee80211_sta_tear_down_BA_sessions(
2484                                                 sta, AGG_STOP_LOCAL_REQUEST);
2485                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2486                 }
2487
2488                 mutex_unlock(&local->sta_mtx);
2489         }
2490
2491         if (local->in_reconfig) {
2492                 local->in_reconfig = false;
2493                 barrier();
2494
2495                 /* Restart deferred ROCs */
2496                 mutex_lock(&local->mtx);
2497                 ieee80211_start_next_roc(local);
2498                 mutex_unlock(&local->mtx);
2499
2500                 /* Requeue all works */
2501                 list_for_each_entry(sdata, &local->interfaces, list)
2502                         ieee80211_queue_work(&local->hw, &sdata->work);
2503         }
2504
2505         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2506                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2507                                         false);
2508
2509         /*
2510          * If this is for hw restart things are still running.
2511          * We may want to change that later, however.
2512          */
2513         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2514                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2515
2516         if (!suspended)
2517                 return 0;
2518
2519 #ifdef CONFIG_PM
2520         /* first set suspended false, then resuming */
2521         local->suspended = false;
2522         mb();
2523         local->resuming = false;
2524
2525         ieee80211_flush_completed_scan(local, false);
2526
2527         if (local->open_count && !reconfig_due_to_wowlan)
2528                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2529
2530         list_for_each_entry(sdata, &local->interfaces, list) {
2531                 if (!ieee80211_sdata_running(sdata))
2532                         continue;
2533                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2534                         ieee80211_sta_restart(sdata);
2535         }
2536
2537         mod_timer(&local->sta_cleanup, jiffies + 1);
2538 #else
2539         WARN_ON(1);
2540 #endif
2541
2542         return 0;
2543 }
2544
2545 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2546 {
2547         struct ieee80211_sub_if_data *sdata;
2548         struct ieee80211_local *local;
2549         struct ieee80211_key *key;
2550
2551         if (WARN_ON(!vif))
2552                 return;
2553
2554         sdata = vif_to_sdata(vif);
2555         local = sdata->local;
2556
2557         if (WARN_ON(!local->resuming))
2558                 return;
2559
2560         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2561                 return;
2562
2563         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2564
2565         mutex_lock(&local->key_mtx);
2566         list_for_each_entry(key, &sdata->key_list, list)
2567                 key->flags |= KEY_FLAG_TAINTED;
2568         mutex_unlock(&local->key_mtx);
2569 }
2570 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2571
2572 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2573 {
2574         struct ieee80211_local *local = sdata->local;
2575         struct ieee80211_chanctx_conf *chanctx_conf;
2576         struct ieee80211_chanctx *chanctx;
2577
2578         mutex_lock(&local->chanctx_mtx);
2579
2580         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2581                                         lockdep_is_held(&local->chanctx_mtx));
2582
2583         /*
2584          * This function can be called from a work, thus it may be possible
2585          * that the chanctx_conf is removed (due to a disconnection, for
2586          * example).
2587          * So nothing should be done in such case.
2588          */
2589         if (!chanctx_conf)
2590                 goto unlock;
2591
2592         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2593         ieee80211_recalc_smps_chanctx(local, chanctx);
2594  unlock:
2595         mutex_unlock(&local->chanctx_mtx);
2596 }
2597
2598 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2599 {
2600         struct ieee80211_local *local = sdata->local;
2601         struct ieee80211_chanctx_conf *chanctx_conf;
2602         struct ieee80211_chanctx *chanctx;
2603
2604         mutex_lock(&local->chanctx_mtx);
2605
2606         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2607                                         lockdep_is_held(&local->chanctx_mtx));
2608
2609         if (WARN_ON_ONCE(!chanctx_conf))
2610                 goto unlock;
2611
2612         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2613         ieee80211_recalc_chanctx_min_def(local, chanctx);
2614  unlock:
2615         mutex_unlock(&local->chanctx_mtx);
2616 }
2617
2618 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2619 {
2620         size_t pos = offset;
2621
2622         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2623                 pos += 2 + ies[pos + 1];
2624
2625         return pos;
2626 }
2627
2628 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2629                                             int rssi_min_thold,
2630                                             int rssi_max_thold)
2631 {
2632         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2633
2634         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2635                 return;
2636
2637         /*
2638          * Scale up threshold values before storing it, as the RSSI averaging
2639          * algorithm uses a scaled up value as well. Change this scaling
2640          * factor if the RSSI averaging algorithm changes.
2641          */
2642         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2643         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2644 }
2645
2646 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2647                                     int rssi_min_thold,
2648                                     int rssi_max_thold)
2649 {
2650         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2651
2652         WARN_ON(rssi_min_thold == rssi_max_thold ||
2653                 rssi_min_thold > rssi_max_thold);
2654
2655         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2656                                        rssi_max_thold);
2657 }
2658 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2659
2660 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2661 {
2662         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2663
2664         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2665 }
2666 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2667
2668 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2669                               u16 cap)
2670 {
2671         __le16 tmp;
2672
2673         *pos++ = WLAN_EID_HT_CAPABILITY;
2674         *pos++ = sizeof(struct ieee80211_ht_cap);
2675         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2676
2677         /* capability flags */
2678         tmp = cpu_to_le16(cap);
2679         memcpy(pos, &tmp, sizeof(u16));
2680         pos += sizeof(u16);
2681
2682         /* AMPDU parameters */
2683         *pos++ = ht_cap->ampdu_factor |
2684                  (ht_cap->ampdu_density <<
2685                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2686
2687         /* MCS set */
2688         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2689         pos += sizeof(ht_cap->mcs);
2690
2691         /* extended capabilities */
2692         pos += sizeof(__le16);
2693
2694         /* BF capabilities */
2695         pos += sizeof(__le32);
2696
2697         /* antenna selection */
2698         pos += sizeof(u8);
2699
2700         return pos;
2701 }
2702
2703 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2704                                u32 cap)
2705 {
2706         __le32 tmp;
2707
2708         *pos++ = WLAN_EID_VHT_CAPABILITY;
2709         *pos++ = sizeof(struct ieee80211_vht_cap);
2710         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2711
2712         /* capability flags */
2713         tmp = cpu_to_le32(cap);
2714         memcpy(pos, &tmp, sizeof(u32));
2715         pos += sizeof(u32);
2716
2717         /* VHT MCS set */
2718         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2719         pos += sizeof(vht_cap->vht_mcs);
2720
2721         return pos;
2722 }
2723
2724 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2725 {
2726         const struct ieee80211_sta_he_cap *he_cap;
2727         struct ieee80211_supported_band *sband;
2728         u8 n;
2729
2730         sband = ieee80211_get_sband(sdata);
2731         if (!sband)
2732                 return 0;
2733
2734         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2735         if (!he_cap)
2736                 return 0;
2737
2738         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2739         return 2 + 1 +
2740                sizeof(he_cap->he_cap_elem) + n +
2741                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2742                                      he_cap->he_cap_elem.phy_cap_info);
2743 }
2744
2745 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2746                               const struct ieee80211_sta_he_cap *he_cap,
2747                               u8 *end)
2748 {
2749         u8 n;
2750         u8 ie_len;
2751         u8 *orig_pos = pos;
2752
2753         /* Make sure we have place for the IE */
2754         /*
2755          * TODO: the 1 added is because this temporarily is under the EXTENSION
2756          * IE. Get rid of it when it moves.
2757          */
2758         if (!he_cap)
2759                 return orig_pos;
2760
2761         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2762         ie_len = 2 + 1 +
2763                  sizeof(he_cap->he_cap_elem) + n +
2764                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2765                                        he_cap->he_cap_elem.phy_cap_info);
2766
2767         if ((end - pos) < ie_len)
2768                 return orig_pos;
2769
2770         *pos++ = WLAN_EID_EXTENSION;
2771         pos++; /* We'll set the size later below */
2772         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2773
2774         /* Fixed data */
2775         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2776         pos += sizeof(he_cap->he_cap_elem);
2777
2778         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2779         pos += n;
2780
2781         /* Check if PPE Threshold should be present */
2782         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2783              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2784                 goto end;
2785
2786         /*
2787          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2788          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2789          */
2790         n = hweight8(he_cap->ppe_thres[0] &
2791                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2792         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2793                    IEEE80211_PPE_THRES_NSS_POS));
2794
2795         /*
2796          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2797          * total size.
2798          */
2799         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2800         n = DIV_ROUND_UP(n, 8);
2801
2802         /* Copy PPE Thresholds */
2803         memcpy(pos, &he_cap->ppe_thres, n);
2804         pos += n;
2805
2806 end:
2807         orig_pos[1] = (pos - orig_pos) - 2;
2808         return pos;
2809 }
2810
2811 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2812                                const struct cfg80211_chan_def *chandef,
2813                                u16 prot_mode, bool rifs_mode)
2814 {
2815         struct ieee80211_ht_operation *ht_oper;
2816         /* Build HT Information */
2817         *pos++ = WLAN_EID_HT_OPERATION;
2818         *pos++ = sizeof(struct ieee80211_ht_operation);
2819         ht_oper = (struct ieee80211_ht_operation *)pos;
2820         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2821                                         chandef->chan->center_freq);
2822         switch (chandef->width) {
2823         case NL80211_CHAN_WIDTH_160:
2824         case NL80211_CHAN_WIDTH_80P80:
2825         case NL80211_CHAN_WIDTH_80:
2826         case NL80211_CHAN_WIDTH_40:
2827                 if (chandef->center_freq1 > chandef->chan->center_freq)
2828                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2829                 else
2830                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2831                 break;
2832         default:
2833                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2834                 break;
2835         }
2836         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2837             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2838             chandef->width != NL80211_CHAN_WIDTH_20)
2839                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2840
2841         if (rifs_mode)
2842                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2843
2844         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2845         ht_oper->stbc_param = 0x0000;
2846
2847         /* It seems that Basic MCS set and Supported MCS set
2848            are identical for the first 10 bytes */
2849         memset(&ht_oper->basic_set, 0, 16);
2850         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2851
2852         return pos + sizeof(struct ieee80211_ht_operation);
2853 }
2854
2855 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2856                                    const struct cfg80211_chan_def *chandef)
2857 {
2858         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2859         *pos++ = 3;                                     /* IE length */
2860         /* New channel width */
2861         switch (chandef->width) {
2862         case NL80211_CHAN_WIDTH_80:
2863                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2864                 break;
2865         case NL80211_CHAN_WIDTH_160:
2866                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2867                 break;
2868         case NL80211_CHAN_WIDTH_80P80:
2869                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2870                 break;
2871         default:
2872                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2873         }
2874
2875         /* new center frequency segment 0 */
2876         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2877         /* new center frequency segment 1 */
2878         if (chandef->center_freq2)
2879                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2880         else
2881                 *pos++ = 0;
2882 }
2883
2884 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2885                                 const struct cfg80211_chan_def *chandef)
2886 {
2887         struct ieee80211_vht_operation *vht_oper;
2888
2889         *pos++ = WLAN_EID_VHT_OPERATION;
2890         *pos++ = sizeof(struct ieee80211_vht_operation);
2891         vht_oper = (struct ieee80211_vht_operation *)pos;
2892         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2893                                                         chandef->center_freq1);
2894         if (chandef->center_freq2)
2895                 vht_oper->center_freq_seg1_idx =
2896                         ieee80211_frequency_to_channel(chandef->center_freq2);
2897         else
2898                 vht_oper->center_freq_seg1_idx = 0x00;
2899
2900         switch (chandef->width) {
2901         case NL80211_CHAN_WIDTH_160:
2902                 /*
2903                  * Convert 160 MHz channel width to new style as interop
2904                  * workaround.
2905                  */
2906                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2907                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2908                 if (chandef->chan->center_freq < chandef->center_freq1)
2909                         vht_oper->center_freq_seg0_idx -= 8;
2910                 else
2911                         vht_oper->center_freq_seg0_idx += 8;
2912                 break;
2913         case NL80211_CHAN_WIDTH_80P80:
2914                 /*
2915                  * Convert 80+80 MHz channel width to new style as interop
2916                  * workaround.
2917                  */
2918                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2919                 break;
2920         case NL80211_CHAN_WIDTH_80:
2921                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2922                 break;
2923         default:
2924                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2925                 break;
2926         }
2927
2928         /* don't require special VHT peer rates */
2929         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2930
2931         return pos + sizeof(struct ieee80211_vht_operation);
2932 }
2933
2934 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2935 {
2936         struct ieee80211_he_operation *he_oper;
2937         u32 he_oper_params;
2938
2939         *pos++ = WLAN_EID_EXTENSION;
2940         *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2941         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2942
2943         he_oper_params = 0;
2944         he_oper_params |= u32_encode_bits(1023, /* disabled */
2945                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2946         he_oper_params |= u32_encode_bits(1,
2947                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2948         he_oper_params |= u32_encode_bits(1,
2949                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2950
2951         he_oper = (struct ieee80211_he_operation *)pos;
2952         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2953
2954         /* don't require special HE peer rates */
2955         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2956
2957         /* TODO add VHT operational and 6GHz operational subelement? */
2958
2959         return pos + sizeof(struct ieee80211_vht_operation);
2960 }
2961
2962 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2963                                struct cfg80211_chan_def *chandef)
2964 {
2965         enum nl80211_channel_type channel_type;
2966
2967         if (!ht_oper)
2968                 return false;
2969
2970         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2971         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2972                 channel_type = NL80211_CHAN_HT20;
2973                 break;
2974         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2975                 channel_type = NL80211_CHAN_HT40PLUS;
2976                 break;
2977         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2978                 channel_type = NL80211_CHAN_HT40MINUS;
2979                 break;
2980         default:
2981                 channel_type = NL80211_CHAN_NO_HT;
2982                 return false;
2983         }
2984
2985         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2986         return true;
2987 }
2988
2989 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2990                                 const struct ieee80211_vht_operation *oper,
2991                                 const struct ieee80211_ht_operation *htop,
2992                                 struct cfg80211_chan_def *chandef)
2993 {
2994         struct cfg80211_chan_def new = *chandef;
2995         int cf0, cf1;
2996         int ccfs0, ccfs1, ccfs2;
2997         int ccf0, ccf1;
2998         u32 vht_cap;
2999         bool support_80_80 = false;
3000         bool support_160 = false;
3001
3002         if (!oper || !htop)
3003                 return false;
3004
3005         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3006         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3007                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3008         support_80_80 = ((vht_cap &
3009                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3010                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3011                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3012                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3013                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3014         ccfs0 = oper->center_freq_seg0_idx;
3015         ccfs1 = oper->center_freq_seg1_idx;
3016         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3017                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3018                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3019
3020         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3021         ccf0 = ccfs0;
3022         ccf1 = ccfs1;
3023         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3024                 ccf1 = ccfs2;
3025
3026         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3027         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3028
3029         switch (oper->chan_width) {
3030         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3031                 /* just use HT information directly */
3032                 break;
3033         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3034                 new.width = NL80211_CHAN_WIDTH_80;
3035                 new.center_freq1 = cf0;
3036                 /* If needed, adjust based on the newer interop workaround. */
3037                 if (ccf1) {
3038                         unsigned int diff;
3039
3040                         diff = abs(ccf1 - ccf0);
3041                         if ((diff == 8) && support_160) {
3042                                 new.width = NL80211_CHAN_WIDTH_160;
3043                                 new.center_freq1 = cf1;
3044                         } else if ((diff > 8) && support_80_80) {
3045                                 new.width = NL80211_CHAN_WIDTH_80P80;
3046                                 new.center_freq2 = cf1;
3047                         }
3048                 }
3049                 break;
3050         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3051                 /* deprecated encoding */
3052                 new.width = NL80211_CHAN_WIDTH_160;
3053                 new.center_freq1 = cf0;
3054                 break;
3055         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3056                 /* deprecated encoding */
3057                 new.width = NL80211_CHAN_WIDTH_80P80;
3058                 new.center_freq1 = cf0;
3059                 new.center_freq2 = cf1;
3060                 break;
3061         default:
3062                 return false;
3063         }
3064
3065         if (!cfg80211_chandef_valid(&new))
3066                 return false;
3067
3068         *chandef = new;
3069         return true;
3070 }
3071
3072 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3073                              const struct ieee80211_supported_band *sband,
3074                              const u8 *srates, int srates_len, u32 *rates)
3075 {
3076         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3077         int shift = ieee80211_chandef_get_shift(chandef);
3078         struct ieee80211_rate *br;
3079         int brate, rate, i, j, count = 0;
3080
3081         *rates = 0;
3082
3083         for (i = 0; i < srates_len; i++) {
3084                 rate = srates[i] & 0x7f;
3085
3086                 for (j = 0; j < sband->n_bitrates; j++) {
3087                         br = &sband->bitrates[j];
3088                         if ((rate_flags & br->flags) != rate_flags)
3089                                 continue;
3090
3091                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3092                         if (brate == rate) {
3093                                 *rates |= BIT(j);
3094                                 count++;
3095                                 break;
3096                         }
3097                 }
3098         }
3099         return count;
3100 }
3101
3102 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3103                             struct sk_buff *skb, bool need_basic,
3104                             enum nl80211_band band)
3105 {
3106         struct ieee80211_local *local = sdata->local;
3107         struct ieee80211_supported_band *sband;
3108         int rate, shift;
3109         u8 i, rates, *pos;
3110         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3111         u32 rate_flags;
3112
3113         shift = ieee80211_vif_get_shift(&sdata->vif);
3114         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3115         sband = local->hw.wiphy->bands[band];
3116         rates = 0;
3117         for (i = 0; i < sband->n_bitrates; i++) {
3118                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3119                         continue;
3120                 rates++;
3121         }
3122         if (rates > 8)
3123                 rates = 8;
3124
3125         if (skb_tailroom(skb) < rates + 2)
3126                 return -ENOMEM;
3127
3128         pos = skb_put(skb, rates + 2);
3129         *pos++ = WLAN_EID_SUPP_RATES;
3130         *pos++ = rates;
3131         for (i = 0; i < rates; i++) {
3132                 u8 basic = 0;
3133                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3134                         continue;
3135
3136                 if (need_basic && basic_rates & BIT(i))
3137                         basic = 0x80;
3138                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3139                                     5 * (1 << shift));
3140                 *pos++ = basic | (u8) rate;
3141         }
3142
3143         return 0;
3144 }
3145
3146 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3147                                 struct sk_buff *skb, bool need_basic,
3148                                 enum nl80211_band band)
3149 {
3150         struct ieee80211_local *local = sdata->local;
3151         struct ieee80211_supported_band *sband;
3152         int rate, shift;
3153         u8 i, exrates, *pos;
3154         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3155         u32 rate_flags;
3156
3157         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3158         shift = ieee80211_vif_get_shift(&sdata->vif);
3159
3160         sband = local->hw.wiphy->bands[band];
3161         exrates = 0;
3162         for (i = 0; i < sband->n_bitrates; i++) {
3163                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3164                         continue;
3165                 exrates++;
3166         }
3167
3168         if (exrates > 8)
3169                 exrates -= 8;
3170         else
3171                 exrates = 0;
3172
3173         if (skb_tailroom(skb) < exrates + 2)
3174                 return -ENOMEM;
3175
3176         if (exrates) {
3177                 pos = skb_put(skb, exrates + 2);
3178                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3179                 *pos++ = exrates;
3180                 for (i = 8; i < sband->n_bitrates; i++) {
3181                         u8 basic = 0;
3182                         if ((rate_flags & sband->bitrates[i].flags)
3183                             != rate_flags)
3184                                 continue;
3185                         if (need_basic && basic_rates & BIT(i))
3186                                 basic = 0x80;
3187                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3188                                             5 * (1 << shift));
3189                         *pos++ = basic | (u8) rate;
3190                 }
3191         }
3192         return 0;
3193 }
3194
3195 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3196 {
3197         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3198         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3199
3200         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3201                 /* non-managed type inferfaces */
3202                 return 0;
3203         }
3204         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3205 }
3206 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3207
3208 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3209 {
3210         if (!mcs)
3211                 return 1;
3212
3213         /* TODO: consider rx_highest */
3214
3215         if (mcs->rx_mask[3])
3216                 return 4;
3217         if (mcs->rx_mask[2])
3218                 return 3;
3219         if (mcs->rx_mask[1])
3220                 return 2;
3221         return 1;
3222 }
3223
3224 /**
3225  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3226  * @local: mac80211 hw info struct
3227  * @status: RX status
3228  * @mpdu_len: total MPDU length (including FCS)
3229  * @mpdu_offset: offset into MPDU to calculate timestamp at
3230  *
3231  * This function calculates the RX timestamp at the given MPDU offset, taking
3232  * into account what the RX timestamp was. An offset of 0 will just normalize
3233  * the timestamp to TSF at beginning of MPDU reception.
3234  */
3235 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3236                                      struct ieee80211_rx_status *status,
3237                                      unsigned int mpdu_len,
3238                                      unsigned int mpdu_offset)
3239 {
3240         u64 ts = status->mactime;
3241         struct rate_info ri;
3242         u16 rate;
3243
3244         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3245                 return 0;
3246
3247         memset(&ri, 0, sizeof(ri));
3248
3249         ri.bw = status->bw;
3250
3251         /* Fill cfg80211 rate info */
3252         switch (status->encoding) {
3253         case RX_ENC_HT:
3254                 ri.mcs = status->rate_idx;
3255                 ri.flags |= RATE_INFO_FLAGS_MCS;
3256                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3257                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3258                 break;
3259         case RX_ENC_VHT:
3260                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3261                 ri.mcs = status->rate_idx;
3262                 ri.nss = status->nss;
3263                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3264                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3265                 break;
3266         default:
3267                 WARN_ON(1);
3268                 /* fall through */
3269         case RX_ENC_LEGACY: {
3270                 struct ieee80211_supported_band *sband;
3271                 int shift = 0;
3272                 int bitrate;
3273
3274                 switch (status->bw) {
3275                 case RATE_INFO_BW_10:
3276                         shift = 1;
3277                         break;
3278                 case RATE_INFO_BW_5:
3279                         shift = 2;
3280                         break;
3281                 }
3282
3283                 sband = local->hw.wiphy->bands[status->band];
3284                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3285                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3286
3287                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3288                         /* TODO: handle HT/VHT preambles */
3289                         if (status->band == NL80211_BAND_5GHZ) {
3290                                 ts += 20 << shift;
3291                                 mpdu_offset += 2;
3292                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3293                                 ts += 96;
3294                         } else {
3295                                 ts += 192;
3296                         }
3297                 }
3298                 break;
3299                 }
3300         }
3301
3302         rate = cfg80211_calculate_bitrate(&ri);
3303         if (WARN_ONCE(!rate,
3304                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3305                       (unsigned long long)status->flag, status->rate_idx,
3306                       status->nss))
3307                 return 0;
3308
3309         /* rewind from end of MPDU */
3310         if (status->flag & RX_FLAG_MACTIME_END)
3311                 ts -= mpdu_len * 8 * 10 / rate;
3312
3313         ts += mpdu_offset * 8 * 10 / rate;
3314
3315         return ts;
3316 }
3317
3318 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3319 {
3320         struct ieee80211_sub_if_data *sdata;
3321         struct cfg80211_chan_def chandef;
3322
3323         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3324         ASSERT_RTNL();
3325
3326         mutex_lock(&local->mtx);
3327         list_for_each_entry(sdata, &local->interfaces, list) {
3328                 /* it might be waiting for the local->mtx, but then
3329                  * by the time it gets it, sdata->wdev.cac_started
3330                  * will no longer be true
3331                  */
3332                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3333
3334                 if (sdata->wdev.cac_started) {
3335                         chandef = sdata->vif.bss_conf.chandef;
3336                         ieee80211_vif_release_channel(sdata);
3337                         cfg80211_cac_event(sdata->dev,
3338                                            &chandef,
3339                                            NL80211_RADAR_CAC_ABORTED,
3340                                            GFP_KERNEL);
3341                 }
3342         }
3343         mutex_unlock(&local->mtx);
3344 }
3345
3346 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3347 {
3348         struct ieee80211_local *local =
3349                 container_of(work, struct ieee80211_local, radar_detected_work);
3350         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3351         struct ieee80211_chanctx *ctx;
3352         int num_chanctx = 0;
3353
3354         mutex_lock(&local->chanctx_mtx);
3355         list_for_each_entry(ctx, &local->chanctx_list, list) {
3356                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3357                         continue;
3358
3359                 num_chanctx++;
3360                 chandef = ctx->conf.def;
3361         }
3362         mutex_unlock(&local->chanctx_mtx);
3363
3364         rtnl_lock();
3365         ieee80211_dfs_cac_cancel(local);
3366         rtnl_unlock();
3367
3368         if (num_chanctx > 1)
3369                 /* XXX: multi-channel is not supported yet */
3370                 WARN_ON(1);
3371         else
3372                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3373 }
3374
3375 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3376 {
3377         struct ieee80211_local *local = hw_to_local(hw);
3378
3379         trace_api_radar_detected(local);
3380
3381         schedule_work(&local->radar_detected_work);
3382 }
3383 EXPORT_SYMBOL(ieee80211_radar_detected);
3384
3385 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3386 {
3387         u32 ret;
3388         int tmp;
3389
3390         switch (c->width) {
3391         case NL80211_CHAN_WIDTH_20:
3392                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3393                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3394                 break;
3395         case NL80211_CHAN_WIDTH_40:
3396                 c->width = NL80211_CHAN_WIDTH_20;
3397                 c->center_freq1 = c->chan->center_freq;
3398                 ret = IEEE80211_STA_DISABLE_40MHZ |
3399                       IEEE80211_STA_DISABLE_VHT;
3400                 break;
3401         case NL80211_CHAN_WIDTH_80:
3402                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3403                 /* n_P40 */
3404                 tmp /= 2;
3405                 /* freq_P40 */
3406                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3407                 c->width = NL80211_CHAN_WIDTH_40;
3408                 ret = IEEE80211_STA_DISABLE_VHT;
3409                 break;
3410         case NL80211_CHAN_WIDTH_80P80:
3411                 c->center_freq2 = 0;
3412                 c->width = NL80211_CHAN_WIDTH_80;
3413                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3414                       IEEE80211_STA_DISABLE_160MHZ;
3415                 break;
3416         case NL80211_CHAN_WIDTH_160:
3417                 /* n_P20 */
3418                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3419                 /* n_P80 */
3420                 tmp /= 4;
3421                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3422                 c->width = NL80211_CHAN_WIDTH_80;
3423                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3424                       IEEE80211_STA_DISABLE_160MHZ;
3425                 break;
3426         default:
3427         case NL80211_CHAN_WIDTH_20_NOHT:
3428                 WARN_ON_ONCE(1);
3429                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3430                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3431                 break;
3432         case NL80211_CHAN_WIDTH_5:
3433         case NL80211_CHAN_WIDTH_10:
3434                 WARN_ON_ONCE(1);
3435                 /* keep c->width */
3436                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3437                 break;
3438         }
3439
3440         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3441
3442         return ret;
3443 }
3444
3445 /*
3446  * Returns true if smps_mode_new is strictly more restrictive than
3447  * smps_mode_old.
3448  */
3449 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3450                                    enum ieee80211_smps_mode smps_mode_new)
3451 {
3452         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3453                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3454                 return false;
3455
3456         switch (smps_mode_old) {
3457         case IEEE80211_SMPS_STATIC:
3458                 return false;
3459         case IEEE80211_SMPS_DYNAMIC:
3460                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3461         case IEEE80211_SMPS_OFF:
3462                 return smps_mode_new != IEEE80211_SMPS_OFF;
3463         default:
3464                 WARN_ON(1);
3465         }
3466
3467         return false;
3468 }
3469
3470 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3471                               struct cfg80211_csa_settings *csa_settings)
3472 {
3473         struct sk_buff *skb;
3474         struct ieee80211_mgmt *mgmt;
3475         struct ieee80211_local *local = sdata->local;
3476         int freq;
3477         int hdr_len = offsetofend(struct ieee80211_mgmt,
3478                                   u.action.u.chan_switch);
3479         u8 *pos;
3480
3481         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3482             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3483                 return -EOPNOTSUPP;
3484
3485         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3486                             5 + /* channel switch announcement element */
3487                             3 + /* secondary channel offset element */
3488                             5 + /* wide bandwidth channel switch announcement */
3489                             8); /* mesh channel switch parameters element */
3490         if (!skb)
3491                 return -ENOMEM;
3492
3493         skb_reserve(skb, local->tx_headroom);
3494         mgmt = skb_put_zero(skb, hdr_len);
3495         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3496                                           IEEE80211_STYPE_ACTION);
3497
3498         eth_broadcast_addr(mgmt->da);
3499         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3500         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3501                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3502         } else {
3503                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3504                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3505         }
3506         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3507         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3508         pos = skb_put(skb, 5);
3509         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3510         *pos++ = 3;                                             /* IE length */
3511         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3512         freq = csa_settings->chandef.chan->center_freq;
3513         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3514         *pos++ = csa_settings->count;                           /* count */
3515
3516         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3517                 enum nl80211_channel_type ch_type;
3518
3519                 skb_put(skb, 3);
3520                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3521                 *pos++ = 1;                                     /* IE length */
3522                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3523                 if (ch_type == NL80211_CHAN_HT40PLUS)
3524                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3525                 else
3526                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3527         }
3528
3529         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3530                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3531
3532                 skb_put(skb, 8);
3533                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3534                 *pos++ = 6;                                     /* IE length */
3535                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3536                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3537                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3538                 *pos++ |= csa_settings->block_tx ?
3539                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3540                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3541                 pos += 2;
3542                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3543                 pos += 2;
3544         }
3545
3546         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3547             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3548             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3549                 skb_put(skb, 5);
3550                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3551         }
3552
3553         ieee80211_tx_skb(sdata, skb);
3554         return 0;
3555 }
3556
3557 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3558 {
3559         return !(cs == NULL || cs->cipher == 0 ||
3560                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3561                  cs->hdr_len <= cs->key_idx_off ||
3562                  cs->key_idx_shift > 7 ||
3563                  cs->key_idx_mask == 0);
3564 }
3565
3566 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3567 {
3568         int i;
3569
3570         /* Ensure we have enough iftype bitmap space for all iftype values */
3571         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3572
3573         for (i = 0; i < n; i++)
3574                 if (!ieee80211_cs_valid(&cs[i]))
3575                         return false;
3576
3577         return true;
3578 }
3579
3580 const struct ieee80211_cipher_scheme *
3581 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3582                  enum nl80211_iftype iftype)
3583 {
3584         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3585         int n = local->hw.n_cipher_schemes;
3586         int i;
3587         const struct ieee80211_cipher_scheme *cs = NULL;
3588
3589         for (i = 0; i < n; i++) {
3590                 if (l[i].cipher == cipher) {
3591                         cs = &l[i];
3592                         break;
3593                 }
3594         }
3595
3596         if (!cs || !(cs->iftype & BIT(iftype)))
3597                 return NULL;
3598
3599         return cs;
3600 }
3601
3602 int ieee80211_cs_headroom(struct ieee80211_local *local,
3603                           struct cfg80211_crypto_settings *crypto,
3604                           enum nl80211_iftype iftype)
3605 {
3606         const struct ieee80211_cipher_scheme *cs;
3607         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3608         int i;
3609
3610         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3611                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3612                                       iftype);
3613
3614                 if (cs && headroom < cs->hdr_len)
3615                         headroom = cs->hdr_len;
3616         }
3617
3618         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3619         if (cs && headroom < cs->hdr_len)
3620                 headroom = cs->hdr_len;
3621
3622         return headroom;
3623 }
3624
3625 static bool
3626 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3627 {
3628         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3629         int skip;
3630
3631         if (end > 0)
3632                 return false;
3633
3634         /* One shot NOA  */
3635         if (data->count[i] == 1)
3636                 return false;
3637
3638         if (data->desc[i].interval == 0)
3639                 return false;
3640
3641         /* End time is in the past, check for repetitions */
3642         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3643         if (data->count[i] < 255) {
3644                 if (data->count[i] <= skip) {
3645                         data->count[i] = 0;
3646                         return false;
3647                 }
3648
3649                 data->count[i] -= skip;
3650         }
3651
3652         data->desc[i].start += skip * data->desc[i].interval;
3653
3654         return true;
3655 }
3656
3657 static bool
3658 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3659                              s32 *offset)
3660 {
3661         bool ret = false;
3662         int i;
3663
3664         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3665                 s32 cur;
3666
3667                 if (!data->count[i])
3668                         continue;
3669
3670                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3671                         ret = true;
3672
3673                 cur = data->desc[i].start - tsf;
3674                 if (cur > *offset)
3675                         continue;
3676
3677                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3678                 if (cur > *offset)
3679                         *offset = cur;
3680         }
3681
3682         return ret;
3683 }
3684
3685 static u32
3686 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3687 {
3688         s32 offset = 0;
3689         int tries = 0;
3690         /*
3691          * arbitrary limit, used to avoid infinite loops when combined NoA
3692          * descriptors cover the full time period.
3693          */
3694         int max_tries = 5;
3695
3696         ieee80211_extend_absent_time(data, tsf, &offset);
3697         do {
3698                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3699                         break;
3700
3701                 tries++;
3702         } while (tries < max_tries);
3703
3704         return offset;
3705 }
3706
3707 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3708 {
3709         u32 next_offset = BIT(31) - 1;
3710         int i;
3711
3712         data->absent = 0;
3713         data->has_next_tsf = false;
3714         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3715                 s32 start;
3716
3717                 if (!data->count[i])
3718                         continue;
3719
3720                 ieee80211_extend_noa_desc(data, tsf, i);
3721                 start = data->desc[i].start - tsf;
3722                 if (start <= 0)
3723                         data->absent |= BIT(i);
3724
3725                 if (next_offset > start)
3726                         next_offset = start;
3727
3728                 data->has_next_tsf = true;
3729         }
3730
3731         if (data->absent)
3732                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3733
3734         data->next_tsf = tsf + next_offset;
3735 }
3736 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3737
3738 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3739                             struct ieee80211_noa_data *data, u32 tsf)
3740 {
3741         int ret = 0;
3742         int i;
3743
3744         memset(data, 0, sizeof(*data));
3745
3746         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3747                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3748
3749                 if (!desc->count || !desc->duration)
3750                         continue;
3751
3752                 data->count[i] = desc->count;
3753                 data->desc[i].start = le32_to_cpu(desc->start_time);
3754                 data->desc[i].duration = le32_to_cpu(desc->duration);
3755                 data->desc[i].interval = le32_to_cpu(desc->interval);
3756
3757                 if (data->count[i] > 1 &&
3758                     data->desc[i].interval < data->desc[i].duration)
3759                         continue;
3760
3761                 ieee80211_extend_noa_desc(data, tsf, i);
3762                 ret++;
3763         }
3764
3765         if (ret)
3766                 ieee80211_update_p2p_noa(data, tsf);
3767
3768         return ret;
3769 }
3770 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3771
3772 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3773                            struct ieee80211_sub_if_data *sdata)
3774 {
3775         u64 tsf = drv_get_tsf(local, sdata);
3776         u64 dtim_count = 0;
3777         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3778         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3779         struct ps_data *ps;
3780         u8 bcns_from_dtim;
3781
3782         if (tsf == -1ULL || !beacon_int || !dtim_period)
3783                 return;
3784
3785         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3786             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3787                 if (!sdata->bss)
3788                         return;
3789
3790                 ps = &sdata->bss->ps;
3791         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3792                 ps = &sdata->u.mesh.ps;
3793         } else {
3794                 return;
3795         }
3796
3797         /*
3798          * actually finds last dtim_count, mac80211 will update in
3799          * __beacon_add_tim().
3800          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3801          */
3802         do_div(tsf, beacon_int);
3803         bcns_from_dtim = do_div(tsf, dtim_period);
3804         /* just had a DTIM */
3805         if (!bcns_from_dtim)
3806                 dtim_count = 0;
3807         else
3808                 dtim_count = dtim_period - bcns_from_dtim;
3809
3810         ps->dtim_count = dtim_count;
3811 }
3812
3813 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3814                                          struct ieee80211_chanctx *ctx)
3815 {
3816         struct ieee80211_sub_if_data *sdata;
3817         u8 radar_detect = 0;
3818
3819         lockdep_assert_held(&local->chanctx_mtx);
3820
3821         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3822                 return 0;
3823
3824         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3825                 if (sdata->reserved_radar_required)
3826                         radar_detect |= BIT(sdata->reserved_chandef.width);
3827
3828         /*
3829          * An in-place reservation context should not have any assigned vifs
3830          * until it replaces the other context.
3831          */
3832         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3833                 !list_empty(&ctx->assigned_vifs));
3834
3835         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3836                 if (sdata->radar_required)
3837                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3838
3839         return radar_detect;
3840 }
3841
3842 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3843                                  const struct cfg80211_chan_def *chandef,
3844                                  enum ieee80211_chanctx_mode chanmode,
3845                                  u8 radar_detect)
3846 {
3847         struct ieee80211_local *local = sdata->local;
3848         struct ieee80211_sub_if_data *sdata_iter;
3849         enum nl80211_iftype iftype = sdata->wdev.iftype;
3850         struct ieee80211_chanctx *ctx;
3851         int total = 1;
3852         struct iface_combination_params params = {
3853                 .radar_detect = radar_detect,
3854         };
3855
3856         lockdep_assert_held(&local->chanctx_mtx);
3857
3858         if (WARN_ON(hweight32(radar_detect) > 1))
3859                 return -EINVAL;
3860
3861         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3862                     !chandef->chan))
3863                 return -EINVAL;
3864
3865         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3866                 return -EINVAL;
3867
3868         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3869             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3870                 /*
3871                  * always passing this is harmless, since it'll be the
3872                  * same value that cfg80211 finds if it finds the same
3873                  * interface ... and that's always allowed
3874                  */
3875                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3876         }
3877
3878         /* Always allow software iftypes */
3879         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3880                 if (radar_detect)
3881                         return -EINVAL;
3882                 return 0;
3883         }
3884
3885         if (chandef)
3886                 params.num_different_channels = 1;
3887
3888         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3889                 params.iftype_num[iftype] = 1;
3890
3891         list_for_each_entry(ctx, &local->chanctx_list, list) {
3892                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3893                         continue;
3894                 params.radar_detect |=
3895                         ieee80211_chanctx_radar_detect(local, ctx);
3896                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3897                         params.num_different_channels++;
3898                         continue;
3899                 }
3900                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3901                     cfg80211_chandef_compatible(chandef,
3902                                                 &ctx->conf.def))
3903                         continue;
3904                 params.num_different_channels++;
3905         }
3906
3907         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3908                 struct wireless_dev *wdev_iter;
3909
3910                 wdev_iter = &sdata_iter->wdev;
3911
3912                 if (sdata_iter == sdata ||
3913                     !ieee80211_sdata_running(sdata_iter) ||
3914                     cfg80211_iftype_allowed(local->hw.wiphy,
3915                                             wdev_iter->iftype, 0, 1))
3916                         continue;
3917
3918                 params.iftype_num[wdev_iter->iftype]++;
3919                 total++;
3920         }
3921
3922         if (total == 1 && !params.radar_detect)
3923                 return 0;
3924
3925         return cfg80211_check_combinations(local->hw.wiphy, &params);
3926 }
3927
3928 static void
3929 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3930                          void *data)
3931 {
3932         u32 *max_num_different_channels = data;
3933
3934         *max_num_different_channels = max(*max_num_different_channels,
3935                                           c->num_different_channels);
3936 }
3937
3938 int ieee80211_max_num_channels(struct ieee80211_local *local)
3939 {
3940         struct ieee80211_sub_if_data *sdata;
3941         struct ieee80211_chanctx *ctx;
3942         u32 max_num_different_channels = 1;
3943         int err;
3944         struct iface_combination_params params = {0};
3945
3946         lockdep_assert_held(&local->chanctx_mtx);
3947
3948         list_for_each_entry(ctx, &local->chanctx_list, list) {
3949                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3950                         continue;
3951
3952                 params.num_different_channels++;
3953
3954                 params.radar_detect |=
3955                         ieee80211_chanctx_radar_detect(local, ctx);
3956         }
3957
3958         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3959                 params.iftype_num[sdata->wdev.iftype]++;
3960
3961         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3962                                          ieee80211_iter_max_chans,
3963                                          &max_num_different_channels);
3964         if (err < 0)
3965                 return err;
3966
3967         return max_num_different_channels;
3968 }
3969
3970 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3971 {
3972         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3973         *buf++ = 7; /* len */
3974         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3975         *buf++ = 0x50;
3976         *buf++ = 0xf2;
3977         *buf++ = 2; /* WME */
3978         *buf++ = 0; /* WME info */
3979         *buf++ = 1; /* WME ver */
3980         *buf++ = qosinfo; /* U-APSD no in use */
3981
3982         return buf;
3983 }
3984
3985 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3986                              unsigned long *frame_cnt,
3987                              unsigned long *byte_cnt)
3988 {
3989         struct txq_info *txqi = to_txq_info(txq);
3990         u32 frag_cnt = 0, frag_bytes = 0;
3991         struct sk_buff *skb;
3992
3993         skb_queue_walk(&txqi->frags, skb) {
3994                 frag_cnt++;
3995                 frag_bytes += skb->len;
3996         }
3997
3998         if (frame_cnt)
3999                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4000
4001         if (byte_cnt)
4002                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4003 }
4004 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4005
4006 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4007         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4008         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4009         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4010         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4011 };