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                         else
1069                                 elem_parse_failed = true;
1070                         break;
1071                 case WLAN_EID_OPMODE_NOTIF:
1072                         if (elen > 0)
1073                                 elems->opmode_notif = pos;
1074                         else
1075                                 elem_parse_failed = true;
1076                         break;
1077                 case WLAN_EID_MESH_ID:
1078                         elems->mesh_id = pos;
1079                         elems->mesh_id_len = elen;
1080                         break;
1081                 case WLAN_EID_MESH_CONFIG:
1082                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1083                                 elems->mesh_config = (void *)pos;
1084                         else
1085                                 elem_parse_failed = true;
1086                         break;
1087                 case WLAN_EID_PEER_MGMT:
1088                         elems->peering = pos;
1089                         elems->peering_len = elen;
1090                         break;
1091                 case WLAN_EID_MESH_AWAKE_WINDOW:
1092                         if (elen >= 2)
1093                                 elems->awake_window = (void *)pos;
1094                         break;
1095                 case WLAN_EID_PREQ:
1096                         elems->preq = pos;
1097                         elems->preq_len = elen;
1098                         break;
1099                 case WLAN_EID_PREP:
1100                         elems->prep = pos;
1101                         elems->prep_len = elen;
1102                         break;
1103                 case WLAN_EID_PERR:
1104                         elems->perr = pos;
1105                         elems->perr_len = elen;
1106                         break;
1107                 case WLAN_EID_RANN:
1108                         if (elen >= sizeof(struct ieee80211_rann_ie))
1109                                 elems->rann = (void *)pos;
1110                         else
1111                                 elem_parse_failed = true;
1112                         break;
1113                 case WLAN_EID_CHANNEL_SWITCH:
1114                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1115                                 elem_parse_failed = true;
1116                                 break;
1117                         }
1118                         elems->ch_switch_ie = (void *)pos;
1119                         break;
1120                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1121                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1122                                 elem_parse_failed = true;
1123                                 break;
1124                         }
1125                         elems->ext_chansw_ie = (void *)pos;
1126                         break;
1127                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1128                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1129                                 elem_parse_failed = true;
1130                                 break;
1131                         }
1132                         elems->sec_chan_offs = (void *)pos;
1133                         break;
1134                 case WLAN_EID_CHAN_SWITCH_PARAM:
1135                         if (elen !=
1136                             sizeof(*elems->mesh_chansw_params_ie)) {
1137                                 elem_parse_failed = true;
1138                                 break;
1139                         }
1140                         elems->mesh_chansw_params_ie = (void *)pos;
1141                         break;
1142                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1143                         if (!action ||
1144                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1145                                 elem_parse_failed = true;
1146                                 break;
1147                         }
1148                         elems->wide_bw_chansw_ie = (void *)pos;
1149                         break;
1150                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1151                         if (action) {
1152                                 elem_parse_failed = true;
1153                                 break;
1154                         }
1155                         /*
1156                          * This is a bit tricky, but as we only care about
1157                          * the wide bandwidth channel switch element, so
1158                          * just parse it out manually.
1159                          */
1160                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1161                                               pos, elen);
1162                         if (ie) {
1163                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1164                                         elems->wide_bw_chansw_ie =
1165                                                 (void *)(ie + 2);
1166                                 else
1167                                         elem_parse_failed = true;
1168                         }
1169                         break;
1170                 case WLAN_EID_COUNTRY:
1171                         elems->country_elem = pos;
1172                         elems->country_elem_len = elen;
1173                         break;
1174                 case WLAN_EID_PWR_CONSTRAINT:
1175                         if (elen != 1) {
1176                                 elem_parse_failed = true;
1177                                 break;
1178                         }
1179                         elems->pwr_constr_elem = pos;
1180                         break;
1181                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1182                         /* Lots of different options exist, but we only care
1183                          * about the Dynamic Transmit Power Control element.
1184                          * First check for the Cisco OUI, then for the DTPC
1185                          * tag (0x00).
1186                          */
1187                         if (elen < 4) {
1188                                 elem_parse_failed = true;
1189                                 break;
1190                         }
1191
1192                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1193                             pos[2] != 0x96 || pos[3] != 0x00)
1194                                 break;
1195
1196                         if (elen != 6) {
1197                                 elem_parse_failed = true;
1198                                 break;
1199                         }
1200
1201                         if (calc_crc)
1202                                 crc = crc32_be(crc, pos - 2, elen + 2);
1203
1204                         elems->cisco_dtpc_elem = pos;
1205                         break;
1206                 case WLAN_EID_ADDBA_EXT:
1207                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1208                                 elem_parse_failed = true;
1209                                 break;
1210                         }
1211                         elems->addba_ext_ie = (void *)pos;
1212                         break;
1213                 case WLAN_EID_TIMEOUT_INTERVAL:
1214                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1215                                 elems->timeout_int = (void *)pos;
1216                         else
1217                                 elem_parse_failed = true;
1218                         break;
1219                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1220                         if (elen >= sizeof(*elems->max_idle_period_ie))
1221                                 elems->max_idle_period_ie = (void *)pos;
1222                         break;
1223                 case WLAN_EID_EXTENSION:
1224                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1225                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1226                                 elems->mu_edca_param_set = (void *)&pos[1];
1227                                 if (calc_crc)
1228                                         crc = crc32_be(crc, pos - 2, elen + 2);
1229                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1230                                 elems->he_cap = (void *)&pos[1];
1231                                 elems->he_cap_len = elen - 1;
1232                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1233                                    elen >= sizeof(*elems->he_operation) &&
1234                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1235                                 elems->he_operation = (void *)&pos[1];
1236                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1237                                 elems->uora_element = (void *)&pos[1];
1238                         } else if (pos[0] ==
1239                                    WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1240                                    elen == 4) {
1241                                 elems->max_channel_switch_time = pos + 1;
1242                         } else if (pos[0] ==
1243                                    WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1244                                    elen == 3) {
1245                                 elems->mbssid_config_ie = (void *)&pos[1];
1246                         } else if (pos[0] == WLAN_EID_EXT_HE_SPR &&
1247                                    elen >= sizeof(*elems->he_spr) &&
1248                                    elen >= ieee80211_he_spr_size(&pos[1])) {
1249                                 elems->he_spr = (void *)&pos[1];
1250                         }
1251                         break;
1252                 default:
1253                         break;
1254                 }
1255
1256                 if (elem_parse_failed)
1257                         elems->parse_error = true;
1258                 else
1259                         __set_bit(id, seen_elems);
1260         }
1261
1262         if (!for_each_element_completed(elem, start, len))
1263                 elems->parse_error = true;
1264
1265         return crc;
1266 }
1267
1268 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1269                                             struct ieee802_11_elems *elems,
1270                                             u8 *transmitter_bssid,
1271                                             u8 *bss_bssid,
1272                                             u8 *nontransmitted_profile)
1273 {
1274         const struct element *elem, *sub;
1275         size_t profile_len = 0;
1276         bool found = false;
1277
1278         if (!bss_bssid || !transmitter_bssid)
1279                 return profile_len;
1280
1281         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1282                 if (elem->datalen < 2)
1283                         continue;
1284
1285                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1286                         u8 new_bssid[ETH_ALEN];
1287                         const u8 *index;
1288
1289                         if (sub->id != 0 || sub->datalen < 4) {
1290                                 /* not a valid BSS profile */
1291                                 continue;
1292                         }
1293
1294                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1295                             sub->data[1] != 2) {
1296                                 /* The first element of the
1297                                  * Nontransmitted BSSID Profile is not
1298                                  * the Nontransmitted BSSID Capability
1299                                  * element.
1300                                  */
1301                                 continue;
1302                         }
1303
1304                         memset(nontransmitted_profile, 0, len);
1305                         profile_len = cfg80211_merge_profile(start, len,
1306                                                              elem,
1307                                                              sub,
1308                                                              nontransmitted_profile,
1309                                                              len);
1310
1311                         /* found a Nontransmitted BSSID Profile */
1312                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1313                                                  nontransmitted_profile,
1314                                                  profile_len);
1315                         if (!index || index[1] < 1 || index[2] == 0) {
1316                                 /* Invalid MBSSID Index element */
1317                                 continue;
1318                         }
1319
1320                         cfg80211_gen_new_bssid(transmitter_bssid,
1321                                                elem->data[0],
1322                                                index[2],
1323                                                new_bssid);
1324                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1325                                 found = true;
1326                                 elems->bssid_index_len = index[1];
1327                                 elems->bssid_index = (void *)&index[2];
1328                                 break;
1329                         }
1330                 }
1331         }
1332
1333         return found ? profile_len : 0;
1334 }
1335
1336 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1337                                struct ieee802_11_elems *elems,
1338                                u64 filter, u32 crc, u8 *transmitter_bssid,
1339                                u8 *bss_bssid)
1340 {
1341         const struct element *non_inherit = NULL;
1342         u8 *nontransmitted_profile;
1343         int nontransmitted_profile_len = 0;
1344
1345         memset(elems, 0, sizeof(*elems));
1346         elems->ie_start = start;
1347         elems->total_len = len;
1348
1349         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1350         if (nontransmitted_profile) {
1351                 nontransmitted_profile_len =
1352                         ieee802_11_find_bssid_profile(start, len, elems,
1353                                                       transmitter_bssid,
1354                                                       bss_bssid,
1355                                                       nontransmitted_profile);
1356                 non_inherit =
1357                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1358                                                nontransmitted_profile,
1359                                                nontransmitted_profile_len);
1360         }
1361
1362         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1363                                           crc, non_inherit);
1364
1365         /* Override with nontransmitted profile, if found */
1366         if (nontransmitted_profile_len)
1367                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1368                                             nontransmitted_profile_len,
1369                                             action, elems, 0, 0, NULL);
1370
1371         if (elems->tim && !elems->parse_error) {
1372                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1373
1374                 elems->dtim_period = tim_ie->dtim_period;
1375                 elems->dtim_count = tim_ie->dtim_count;
1376         }
1377
1378         /* Override DTIM period and count if needed */
1379         if (elems->bssid_index &&
1380             elems->bssid_index_len >=
1381             offsetofend(struct ieee80211_bssid_index, dtim_period))
1382                 elems->dtim_period = elems->bssid_index->dtim_period;
1383
1384         if (elems->bssid_index &&
1385             elems->bssid_index_len >=
1386             offsetofend(struct ieee80211_bssid_index, dtim_count))
1387                 elems->dtim_count = elems->bssid_index->dtim_count;
1388
1389         kfree(nontransmitted_profile);
1390
1391         return crc;
1392 }
1393
1394 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1395                                            struct ieee80211_tx_queue_params
1396                                            *qparam, int ac)
1397 {
1398         struct ieee80211_chanctx_conf *chanctx_conf;
1399         const struct ieee80211_reg_rule *rrule;
1400         const struct ieee80211_wmm_ac *wmm_ac;
1401         u16 center_freq = 0;
1402
1403         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1404             sdata->vif.type != NL80211_IFTYPE_STATION)
1405                 return;
1406
1407         rcu_read_lock();
1408         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1409         if (chanctx_conf)
1410                 center_freq = chanctx_conf->def.chan->center_freq;
1411
1412         if (!center_freq) {
1413                 rcu_read_unlock();
1414                 return;
1415         }
1416
1417         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1418
1419         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1420                 rcu_read_unlock();
1421                 return;
1422         }
1423
1424         if (sdata->vif.type == NL80211_IFTYPE_AP)
1425                 wmm_ac = &rrule->wmm_rule.ap[ac];
1426         else
1427                 wmm_ac = &rrule->wmm_rule.client[ac];
1428         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1429         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1430         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1431         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1432         rcu_read_unlock();
1433 }
1434
1435 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1436                                bool bss_notify, bool enable_qos)
1437 {
1438         struct ieee80211_local *local = sdata->local;
1439         struct ieee80211_tx_queue_params qparam;
1440         struct ieee80211_chanctx_conf *chanctx_conf;
1441         int ac;
1442         bool use_11b;
1443         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1444         int aCWmin, aCWmax;
1445
1446         if (!local->ops->conf_tx)
1447                 return;
1448
1449         if (local->hw.queues < IEEE80211_NUM_ACS)
1450                 return;
1451
1452         memset(&qparam, 0, sizeof(qparam));
1453
1454         rcu_read_lock();
1455         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1456         use_11b = (chanctx_conf &&
1457                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1458                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1459         rcu_read_unlock();
1460
1461         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1462
1463         /* Set defaults according to 802.11-2007 Table 7-37 */
1464         aCWmax = 1023;
1465         if (use_11b)
1466                 aCWmin = 31;
1467         else
1468                 aCWmin = 15;
1469
1470         /* Confiure old 802.11b/g medium access rules. */
1471         qparam.cw_max = aCWmax;
1472         qparam.cw_min = aCWmin;
1473         qparam.txop = 0;
1474         qparam.aifs = 2;
1475
1476         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1477                 /* Update if QoS is enabled. */
1478                 if (enable_qos) {
1479                         switch (ac) {
1480                         case IEEE80211_AC_BK:
1481                                 qparam.cw_max = aCWmax;
1482                                 qparam.cw_min = aCWmin;
1483                                 qparam.txop = 0;
1484                                 if (is_ocb)
1485                                         qparam.aifs = 9;
1486                                 else
1487                                         qparam.aifs = 7;
1488                                 break;
1489                         /* never happens but let's not leave undefined */
1490                         default:
1491                         case IEEE80211_AC_BE:
1492                                 qparam.cw_max = aCWmax;
1493                                 qparam.cw_min = aCWmin;
1494                                 qparam.txop = 0;
1495                                 if (is_ocb)
1496                                         qparam.aifs = 6;
1497                                 else
1498                                         qparam.aifs = 3;
1499                                 break;
1500                         case IEEE80211_AC_VI:
1501                                 qparam.cw_max = aCWmin;
1502                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1503                                 if (is_ocb)
1504                                         qparam.txop = 0;
1505                                 else if (use_11b)
1506                                         qparam.txop = 6016/32;
1507                                 else
1508                                         qparam.txop = 3008/32;
1509
1510                                 if (is_ocb)
1511                                         qparam.aifs = 3;
1512                                 else
1513                                         qparam.aifs = 2;
1514                                 break;
1515                         case IEEE80211_AC_VO:
1516                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1517                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1518                                 if (is_ocb)
1519                                         qparam.txop = 0;
1520                                 else if (use_11b)
1521                                         qparam.txop = 3264/32;
1522                                 else
1523                                         qparam.txop = 1504/32;
1524                                 qparam.aifs = 2;
1525                                 break;
1526                         }
1527                 }
1528                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1529
1530                 qparam.uapsd = false;
1531
1532                 sdata->tx_conf[ac] = qparam;
1533                 drv_conf_tx(local, sdata, ac, &qparam);
1534         }
1535
1536         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1537             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1538             sdata->vif.type != NL80211_IFTYPE_NAN) {
1539                 sdata->vif.bss_conf.qos = enable_qos;
1540                 if (bss_notify)
1541                         ieee80211_bss_info_change_notify(sdata,
1542                                                          BSS_CHANGED_QOS);
1543         }
1544 }
1545
1546 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1547                          u16 transaction, u16 auth_alg, u16 status,
1548                          const u8 *extra, size_t extra_len, const u8 *da,
1549                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1550                          u32 tx_flags)
1551 {
1552         struct ieee80211_local *local = sdata->local;
1553         struct sk_buff *skb;
1554         struct ieee80211_mgmt *mgmt;
1555         int err;
1556
1557         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1558         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1559                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1560         if (!skb)
1561                 return;
1562
1563         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1564
1565         mgmt = skb_put_zero(skb, 24 + 6);
1566         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1567                                           IEEE80211_STYPE_AUTH);
1568         memcpy(mgmt->da, da, ETH_ALEN);
1569         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1570         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1571         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1572         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1573         mgmt->u.auth.status_code = cpu_to_le16(status);
1574         if (extra)
1575                 skb_put_data(skb, extra, extra_len);
1576
1577         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1578                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1579                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1580                 WARN_ON(err);
1581         }
1582
1583         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1584                                         tx_flags;
1585         ieee80211_tx_skb(sdata, skb);
1586 }
1587
1588 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1589                                     const u8 *da, const u8 *bssid,
1590                                     u16 stype, u16 reason,
1591                                     bool send_frame, u8 *frame_buf)
1592 {
1593         struct ieee80211_local *local = sdata->local;
1594         struct sk_buff *skb;
1595         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1596
1597         /* build frame */
1598         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1599         mgmt->duration = 0; /* initialize only */
1600         mgmt->seq_ctrl = 0; /* initialize only */
1601         memcpy(mgmt->da, da, ETH_ALEN);
1602         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1603         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1604         /* u.deauth.reason_code == u.disassoc.reason_code */
1605         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1606
1607         if (send_frame) {
1608                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1609                                     IEEE80211_DEAUTH_FRAME_LEN);
1610                 if (!skb)
1611                         return;
1612
1613                 skb_reserve(skb, local->hw.extra_tx_headroom);
1614
1615                 /* copy in frame */
1616                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1617
1618                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1619                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1620                         IEEE80211_SKB_CB(skb)->flags |=
1621                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1622
1623                 ieee80211_tx_skb(sdata, skb);
1624         }
1625 }
1626
1627 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1628                                          u8 *buffer, size_t buffer_len,
1629                                          const u8 *ie, size_t ie_len,
1630                                          enum nl80211_band band,
1631                                          u32 rate_mask,
1632                                          struct cfg80211_chan_def *chandef,
1633                                          size_t *offset, u32 flags)
1634 {
1635         struct ieee80211_supported_band *sband;
1636         const struct ieee80211_sta_he_cap *he_cap;
1637         u8 *pos = buffer, *end = buffer + buffer_len;
1638         size_t noffset;
1639         int supp_rates_len, i;
1640         u8 rates[32];
1641         int num_rates;
1642         int ext_rates_len;
1643         int shift;
1644         u32 rate_flags;
1645         bool have_80mhz = false;
1646
1647         *offset = 0;
1648
1649         sband = local->hw.wiphy->bands[band];
1650         if (WARN_ON_ONCE(!sband))
1651                 return 0;
1652
1653         rate_flags = ieee80211_chandef_rate_flags(chandef);
1654         shift = ieee80211_chandef_get_shift(chandef);
1655
1656         num_rates = 0;
1657         for (i = 0; i < sband->n_bitrates; i++) {
1658                 if ((BIT(i) & rate_mask) == 0)
1659                         continue; /* skip rate */
1660                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1661                         continue;
1662
1663                 rates[num_rates++] =
1664                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1665                                           (1 << shift) * 5);
1666         }
1667
1668         supp_rates_len = min_t(int, num_rates, 8);
1669
1670         if (end - pos < 2 + supp_rates_len)
1671                 goto out_err;
1672         *pos++ = WLAN_EID_SUPP_RATES;
1673         *pos++ = supp_rates_len;
1674         memcpy(pos, rates, supp_rates_len);
1675         pos += supp_rates_len;
1676
1677         /* insert "request information" if in custom IEs */
1678         if (ie && ie_len) {
1679                 static const u8 before_extrates[] = {
1680                         WLAN_EID_SSID,
1681                         WLAN_EID_SUPP_RATES,
1682                         WLAN_EID_REQUEST,
1683                 };
1684                 noffset = ieee80211_ie_split(ie, ie_len,
1685                                              before_extrates,
1686                                              ARRAY_SIZE(before_extrates),
1687                                              *offset);
1688                 if (end - pos < noffset - *offset)
1689                         goto out_err;
1690                 memcpy(pos, ie + *offset, noffset - *offset);
1691                 pos += noffset - *offset;
1692                 *offset = noffset;
1693         }
1694
1695         ext_rates_len = num_rates - supp_rates_len;
1696         if (ext_rates_len > 0) {
1697                 if (end - pos < 2 + ext_rates_len)
1698                         goto out_err;
1699                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1700                 *pos++ = ext_rates_len;
1701                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1702                 pos += ext_rates_len;
1703         }
1704
1705         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1706                 if (end - pos < 3)
1707                         goto out_err;
1708                 *pos++ = WLAN_EID_DS_PARAMS;
1709                 *pos++ = 1;
1710                 *pos++ = ieee80211_frequency_to_channel(
1711                                 chandef->chan->center_freq);
1712         }
1713
1714         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1715                 goto done;
1716
1717         /* insert custom IEs that go before HT */
1718         if (ie && ie_len) {
1719                 static const u8 before_ht[] = {
1720                         /*
1721                          * no need to list the ones split off already
1722                          * (or generated here)
1723                          */
1724                         WLAN_EID_DS_PARAMS,
1725                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1726                 };
1727                 noffset = ieee80211_ie_split(ie, ie_len,
1728                                              before_ht, ARRAY_SIZE(before_ht),
1729                                              *offset);
1730                 if (end - pos < noffset - *offset)
1731                         goto out_err;
1732                 memcpy(pos, ie + *offset, noffset - *offset);
1733                 pos += noffset - *offset;
1734                 *offset = noffset;
1735         }
1736
1737         if (sband->ht_cap.ht_supported) {
1738                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1739                         goto out_err;
1740                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1741                                                 sband->ht_cap.cap);
1742         }
1743
1744         /* insert custom IEs that go before VHT */
1745         if (ie && ie_len) {
1746                 static const u8 before_vht[] = {
1747                         /*
1748                          * no need to list the ones split off already
1749                          * (or generated here)
1750                          */
1751                         WLAN_EID_BSS_COEX_2040,
1752                         WLAN_EID_EXT_CAPABILITY,
1753                         WLAN_EID_SSID_LIST,
1754                         WLAN_EID_CHANNEL_USAGE,
1755                         WLAN_EID_INTERWORKING,
1756                         WLAN_EID_MESH_ID,
1757                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1758                 };
1759                 noffset = ieee80211_ie_split(ie, ie_len,
1760                                              before_vht, ARRAY_SIZE(before_vht),
1761                                              *offset);
1762                 if (end - pos < noffset - *offset)
1763                         goto out_err;
1764                 memcpy(pos, ie + *offset, noffset - *offset);
1765                 pos += noffset - *offset;
1766                 *offset = noffset;
1767         }
1768
1769         /* Check if any channel in this sband supports at least 80 MHz */
1770         for (i = 0; i < sband->n_channels; i++) {
1771                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1772                                                 IEEE80211_CHAN_NO_80MHZ))
1773                         continue;
1774
1775                 have_80mhz = true;
1776                 break;
1777         }
1778
1779         if (sband->vht_cap.vht_supported && have_80mhz) {
1780                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1781                         goto out_err;
1782                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1783                                                  sband->vht_cap.cap);
1784         }
1785
1786         /* insert custom IEs that go before HE */
1787         if (ie && ie_len) {
1788                 static const u8 before_he[] = {
1789                         /*
1790                          * no need to list the ones split off before VHT
1791                          * or generated here
1792                          */
1793                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1794                         WLAN_EID_AP_CSN,
1795                         /* TODO: add 11ah/11aj/11ak elements */
1796                 };
1797                 noffset = ieee80211_ie_split(ie, ie_len,
1798                                              before_he, ARRAY_SIZE(before_he),
1799                                              *offset);
1800                 if (end - pos < noffset - *offset)
1801                         goto out_err;
1802                 memcpy(pos, ie + *offset, noffset - *offset);
1803                 pos += noffset - *offset;
1804                 *offset = noffset;
1805         }
1806
1807         he_cap = ieee80211_get_he_sta_cap(sband);
1808         if (he_cap) {
1809                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1810                 if (!pos)
1811                         goto out_err;
1812         }
1813
1814         /*
1815          * If adding more here, adjust code in main.c
1816          * that calculates local->scan_ies_len.
1817          */
1818
1819         return pos - buffer;
1820  out_err:
1821         WARN_ONCE(1, "not enough space for preq IEs\n");
1822  done:
1823         return pos - buffer;
1824 }
1825
1826 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1827                              size_t buffer_len,
1828                              struct ieee80211_scan_ies *ie_desc,
1829                              const u8 *ie, size_t ie_len,
1830                              u8 bands_used, u32 *rate_masks,
1831                              struct cfg80211_chan_def *chandef,
1832                              u32 flags)
1833 {
1834         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1835         int i;
1836
1837         memset(ie_desc, 0, sizeof(*ie_desc));
1838
1839         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1840                 if (bands_used & BIT(i)) {
1841                         pos += ieee80211_build_preq_ies_band(local,
1842                                                              buffer + pos,
1843                                                              buffer_len - pos,
1844                                                              ie, ie_len, i,
1845                                                              rate_masks[i],
1846                                                              chandef,
1847                                                              &custom_ie_offset,
1848                                                              flags);
1849                         ie_desc->ies[i] = buffer + old_pos;
1850                         ie_desc->len[i] = pos - old_pos;
1851                         old_pos = pos;
1852                 }
1853         }
1854
1855         /* add any remaining custom IEs */
1856         if (ie && ie_len) {
1857                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1858                               "not enough space for preq custom IEs\n"))
1859                         return pos;
1860                 memcpy(buffer + pos, ie + custom_ie_offset,
1861                        ie_len - custom_ie_offset);
1862                 ie_desc->common_ies = buffer + pos;
1863                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1864                 pos += ie_len - custom_ie_offset;
1865         }
1866
1867         return pos;
1868 };
1869
1870 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1871                                           const u8 *src, const u8 *dst,
1872                                           u32 ratemask,
1873                                           struct ieee80211_channel *chan,
1874                                           const u8 *ssid, size_t ssid_len,
1875                                           const u8 *ie, size_t ie_len,
1876                                           u32 flags)
1877 {
1878         struct ieee80211_local *local = sdata->local;
1879         struct cfg80211_chan_def chandef;
1880         struct sk_buff *skb;
1881         struct ieee80211_mgmt *mgmt;
1882         int ies_len;
1883         u32 rate_masks[NUM_NL80211_BANDS] = {};
1884         struct ieee80211_scan_ies dummy_ie_desc;
1885
1886         /*
1887          * Do not send DS Channel parameter for directed probe requests
1888          * in order to maximize the chance that we get a response.  Some
1889          * badly-behaved APs don't respond when this parameter is included.
1890          */
1891         chandef.width = sdata->vif.bss_conf.chandef.width;
1892         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1893                 chandef.chan = NULL;
1894         else
1895                 chandef.chan = chan;
1896
1897         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1898                                      100 + ie_len);
1899         if (!skb)
1900                 return NULL;
1901
1902         rate_masks[chan->band] = ratemask;
1903         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1904                                            skb_tailroom(skb), &dummy_ie_desc,
1905                                            ie, ie_len, BIT(chan->band),
1906                                            rate_masks, &chandef, flags);
1907         skb_put(skb, ies_len);
1908
1909         if (dst) {
1910                 mgmt = (struct ieee80211_mgmt *) skb->data;
1911                 memcpy(mgmt->da, dst, ETH_ALEN);
1912                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1913         }
1914
1915         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1916
1917         return skb;
1918 }
1919
1920 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1921                             struct ieee802_11_elems *elems,
1922                             enum nl80211_band band, u32 *basic_rates)
1923 {
1924         struct ieee80211_supported_band *sband;
1925         size_t num_rates;
1926         u32 supp_rates, rate_flags;
1927         int i, j, shift;
1928
1929         sband = sdata->local->hw.wiphy->bands[band];
1930         if (WARN_ON(!sband))
1931                 return 1;
1932
1933         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1934         shift = ieee80211_vif_get_shift(&sdata->vif);
1935
1936         num_rates = sband->n_bitrates;
1937         supp_rates = 0;
1938         for (i = 0; i < elems->supp_rates_len +
1939                      elems->ext_supp_rates_len; i++) {
1940                 u8 rate = 0;
1941                 int own_rate;
1942                 bool is_basic;
1943                 if (i < elems->supp_rates_len)
1944                         rate = elems->supp_rates[i];
1945                 else if (elems->ext_supp_rates)
1946                         rate = elems->ext_supp_rates
1947                                 [i - elems->supp_rates_len];
1948                 own_rate = 5 * (rate & 0x7f);
1949                 is_basic = !!(rate & 0x80);
1950
1951                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1952                         continue;
1953
1954                 for (j = 0; j < num_rates; j++) {
1955                         int brate;
1956                         if ((rate_flags & sband->bitrates[j].flags)
1957                             != rate_flags)
1958                                 continue;
1959
1960                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1961                                              1 << shift);
1962
1963                         if (brate == own_rate) {
1964                                 supp_rates |= BIT(j);
1965                                 if (basic_rates && is_basic)
1966                                         *basic_rates |= BIT(j);
1967                         }
1968                 }
1969         }
1970         return supp_rates;
1971 }
1972
1973 void ieee80211_stop_device(struct ieee80211_local *local)
1974 {
1975         ieee80211_led_radio(local, false);
1976         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1977
1978         cancel_work_sync(&local->reconfig_filter);
1979
1980         flush_workqueue(local->workqueue);
1981         drv_stop(local);
1982 }
1983
1984 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1985                                            bool aborted)
1986 {
1987         /* It's possible that we don't handle the scan completion in
1988          * time during suspend, so if it's still marked as completed
1989          * here, queue the work and flush it to clean things up.
1990          * Instead of calling the worker function directly here, we
1991          * really queue it to avoid potential races with other flows
1992          * scheduling the same work.
1993          */
1994         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1995                 /* If coming from reconfiguration failure, abort the scan so
1996                  * we don't attempt to continue a partial HW scan - which is
1997                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1998                  * completed scan, and a 5 GHz portion is still pending.
1999                  */
2000                 if (aborted)
2001                         set_bit(SCAN_ABORTED, &local->scanning);
2002                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2003                 flush_delayed_work(&local->scan_work);
2004         }
2005 }
2006
2007 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2008 {
2009         struct ieee80211_sub_if_data *sdata;
2010         struct ieee80211_chanctx *ctx;
2011
2012         /*
2013          * We get here if during resume the device can't be restarted properly.
2014          * We might also get here if this happens during HW reset, which is a
2015          * slightly different situation and we need to drop all connections in
2016          * the latter case.
2017          *
2018          * Ask cfg80211 to turn off all interfaces, this will result in more
2019          * warnings but at least we'll then get into a clean stopped state.
2020          */
2021
2022         local->resuming = false;
2023         local->suspended = false;
2024         local->in_reconfig = false;
2025
2026         ieee80211_flush_completed_scan(local, true);
2027
2028         /* scheduled scan clearly can't be running any more, but tell
2029          * cfg80211 and clear local state
2030          */
2031         ieee80211_sched_scan_end(local);
2032
2033         list_for_each_entry(sdata, &local->interfaces, list)
2034                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2035
2036         /* Mark channel contexts as not being in the driver any more to avoid
2037          * removing them from the driver during the shutdown process...
2038          */
2039         mutex_lock(&local->chanctx_mtx);
2040         list_for_each_entry(ctx, &local->chanctx_list, list)
2041                 ctx->driver_present = false;
2042         mutex_unlock(&local->chanctx_mtx);
2043
2044         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2045 }
2046
2047 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2048                                      struct ieee80211_sub_if_data *sdata)
2049 {
2050         struct ieee80211_chanctx_conf *conf;
2051         struct ieee80211_chanctx *ctx;
2052
2053         if (!local->use_chanctx)
2054                 return;
2055
2056         mutex_lock(&local->chanctx_mtx);
2057         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2058                                          lockdep_is_held(&local->chanctx_mtx));
2059         if (conf) {
2060                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2061                 drv_assign_vif_chanctx(local, sdata, ctx);
2062         }
2063         mutex_unlock(&local->chanctx_mtx);
2064 }
2065
2066 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2067 {
2068         struct ieee80211_local *local = sdata->local;
2069         struct sta_info *sta;
2070
2071         /* add STAs back */
2072         mutex_lock(&local->sta_mtx);
2073         list_for_each_entry(sta, &local->sta_list, list) {
2074                 enum ieee80211_sta_state state;
2075
2076                 if (!sta->uploaded || sta->sdata != sdata)
2077                         continue;
2078
2079                 for (state = IEEE80211_STA_NOTEXIST;
2080                      state < sta->sta_state; state++)
2081                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2082                                               state + 1));
2083         }
2084         mutex_unlock(&local->sta_mtx);
2085 }
2086
2087 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2088 {
2089         struct cfg80211_nan_func *func, **funcs;
2090         int res, id, i = 0;
2091
2092         res = drv_start_nan(sdata->local, sdata,
2093                             &sdata->u.nan.conf);
2094         if (WARN_ON(res))
2095                 return res;
2096
2097         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2098                         sizeof(*funcs),
2099                         GFP_KERNEL);
2100         if (!funcs)
2101                 return -ENOMEM;
2102
2103         /* Add all the functions:
2104          * This is a little bit ugly. We need to call a potentially sleeping
2105          * callback for each NAN function, so we can't hold the spinlock.
2106          */
2107         spin_lock_bh(&sdata->u.nan.func_lock);
2108
2109         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2110                 funcs[i++] = func;
2111
2112         spin_unlock_bh(&sdata->u.nan.func_lock);
2113
2114         for (i = 0; funcs[i]; i++) {
2115                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2116                 if (WARN_ON(res))
2117                         ieee80211_nan_func_terminated(&sdata->vif,
2118                                                       funcs[i]->instance_id,
2119                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2120                                                       GFP_KERNEL);
2121         }
2122
2123         kfree(funcs);
2124
2125         return 0;
2126 }
2127
2128 int ieee80211_reconfig(struct ieee80211_local *local)
2129 {
2130         struct ieee80211_hw *hw = &local->hw;
2131         struct ieee80211_sub_if_data *sdata;
2132         struct ieee80211_chanctx *ctx;
2133         struct sta_info *sta;
2134         int res, i;
2135         bool reconfig_due_to_wowlan = false;
2136         struct ieee80211_sub_if_data *sched_scan_sdata;
2137         struct cfg80211_sched_scan_request *sched_scan_req;
2138         bool sched_scan_stopped = false;
2139         bool suspended = local->suspended;
2140
2141         /* nothing to do if HW shouldn't run */
2142         if (!local->open_count)
2143                 goto wake_up;
2144
2145 #ifdef CONFIG_PM
2146         if (suspended)
2147                 local->resuming = true;
2148
2149         if (local->wowlan) {
2150                 /*
2151                  * In the wowlan case, both mac80211 and the device
2152                  * are functional when the resume op is called, so
2153                  * clear local->suspended so the device could operate
2154                  * normally (e.g. pass rx frames).
2155                  */
2156                 local->suspended = false;
2157                 res = drv_resume(local);
2158                 local->wowlan = false;
2159                 if (res < 0) {
2160                         local->resuming = false;
2161                         return res;
2162                 }
2163                 if (res == 0)
2164                         goto wake_up;
2165                 WARN_ON(res > 1);
2166                 /*
2167                  * res is 1, which means the driver requested
2168                  * to go through a regular reset on wakeup.
2169                  * restore local->suspended in this case.
2170                  */
2171                 reconfig_due_to_wowlan = true;
2172                 local->suspended = true;
2173         }
2174 #endif
2175
2176         /*
2177          * In case of hw_restart during suspend (without wowlan),
2178          * cancel restart work, as we are reconfiguring the device
2179          * anyway.
2180          * Note that restart_work is scheduled on a frozen workqueue,
2181          * so we can't deadlock in this case.
2182          */
2183         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2184                 cancel_work_sync(&local->restart_work);
2185
2186         local->started = false;
2187
2188         /*
2189          * Upon resume hardware can sometimes be goofy due to
2190          * various platform / driver / bus issues, so restarting
2191          * the device may at times not work immediately. Propagate
2192          * the error.
2193          */
2194         res = drv_start(local);
2195         if (res) {
2196                 if (suspended)
2197                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2198                 else
2199                         WARN(1, "Hardware became unavailable during restart.\n");
2200                 ieee80211_handle_reconfig_failure(local);
2201                 return res;
2202         }
2203
2204         /* setup fragmentation threshold */
2205         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2206
2207         /* setup RTS threshold */
2208         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2209
2210         /* reset coverage class */
2211         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2212
2213         ieee80211_led_radio(local, true);
2214         ieee80211_mod_tpt_led_trig(local,
2215                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2216
2217         /* add interfaces */
2218         sdata = rtnl_dereference(local->monitor_sdata);
2219         if (sdata) {
2220                 /* in HW restart it exists already */
2221                 WARN_ON(local->resuming);
2222                 res = drv_add_interface(local, sdata);
2223                 if (WARN_ON(res)) {
2224                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2225                         synchronize_net();
2226                         kfree(sdata);
2227                 }
2228         }
2229
2230         list_for_each_entry(sdata, &local->interfaces, list) {
2231                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2232                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2233                     ieee80211_sdata_running(sdata)) {
2234                         res = drv_add_interface(local, sdata);
2235                         if (WARN_ON(res))
2236                                 break;
2237                 }
2238         }
2239
2240         /* If adding any of the interfaces failed above, roll back and
2241          * report failure.
2242          */
2243         if (res) {
2244                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2245                                                      list)
2246                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2247                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2248                             ieee80211_sdata_running(sdata))
2249                                 drv_remove_interface(local, sdata);
2250                 ieee80211_handle_reconfig_failure(local);
2251                 return res;
2252         }
2253
2254         /* add channel contexts */
2255         if (local->use_chanctx) {
2256                 mutex_lock(&local->chanctx_mtx);
2257                 list_for_each_entry(ctx, &local->chanctx_list, list)
2258                         if (ctx->replace_state !=
2259                             IEEE80211_CHANCTX_REPLACES_OTHER)
2260                                 WARN_ON(drv_add_chanctx(local, ctx));
2261                 mutex_unlock(&local->chanctx_mtx);
2262
2263                 sdata = rtnl_dereference(local->monitor_sdata);
2264                 if (sdata && ieee80211_sdata_running(sdata))
2265                         ieee80211_assign_chanctx(local, sdata);
2266         }
2267
2268         /* reconfigure hardware */
2269         ieee80211_hw_config(local, ~0);
2270
2271         ieee80211_configure_filter(local);
2272
2273         /* Finally also reconfigure all the BSS information */
2274         list_for_each_entry(sdata, &local->interfaces, list) {
2275                 u32 changed;
2276
2277                 if (!ieee80211_sdata_running(sdata))
2278                         continue;
2279
2280                 ieee80211_assign_chanctx(local, sdata);
2281
2282                 switch (sdata->vif.type) {
2283                 case NL80211_IFTYPE_AP_VLAN:
2284                 case NL80211_IFTYPE_MONITOR:
2285                         break;
2286                 case NL80211_IFTYPE_ADHOC:
2287                         if (sdata->vif.bss_conf.ibss_joined)
2288                                 WARN_ON(drv_join_ibss(local, sdata));
2289                         /* fall through */
2290                 default:
2291                         ieee80211_reconfig_stations(sdata);
2292                         /* fall through */
2293                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2294                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2295                                 drv_conf_tx(local, sdata, i,
2296                                             &sdata->tx_conf[i]);
2297                         break;
2298                 }
2299
2300                 /* common change flags for all interface types */
2301                 changed = BSS_CHANGED_ERP_CTS_PROT |
2302                           BSS_CHANGED_ERP_PREAMBLE |
2303                           BSS_CHANGED_ERP_SLOT |
2304                           BSS_CHANGED_HT |
2305                           BSS_CHANGED_BASIC_RATES |
2306                           BSS_CHANGED_BEACON_INT |
2307                           BSS_CHANGED_BSSID |
2308                           BSS_CHANGED_CQM |
2309                           BSS_CHANGED_QOS |
2310                           BSS_CHANGED_IDLE |
2311                           BSS_CHANGED_TXPOWER |
2312                           BSS_CHANGED_MCAST_RATE;
2313
2314                 if (sdata->vif.mu_mimo_owner)
2315                         changed |= BSS_CHANGED_MU_GROUPS;
2316
2317                 switch (sdata->vif.type) {
2318                 case NL80211_IFTYPE_STATION:
2319                         changed |= BSS_CHANGED_ASSOC |
2320                                    BSS_CHANGED_ARP_FILTER |
2321                                    BSS_CHANGED_PS;
2322
2323                         /* Re-send beacon info report to the driver */
2324                         if (sdata->u.mgd.have_beacon)
2325                                 changed |= BSS_CHANGED_BEACON_INFO;
2326
2327                         if (sdata->vif.bss_conf.max_idle_period ||
2328                             sdata->vif.bss_conf.protected_keep_alive)
2329                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2330
2331                         sdata_lock(sdata);
2332                         ieee80211_bss_info_change_notify(sdata, changed);
2333                         sdata_unlock(sdata);
2334                         break;
2335                 case NL80211_IFTYPE_OCB:
2336                         changed |= BSS_CHANGED_OCB;
2337                         ieee80211_bss_info_change_notify(sdata, changed);
2338                         break;
2339                 case NL80211_IFTYPE_ADHOC:
2340                         changed |= BSS_CHANGED_IBSS;
2341                         /* fall through */
2342                 case NL80211_IFTYPE_AP:
2343                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2344
2345                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2346                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2347                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2348                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2349
2350                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2351                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2352
2353                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2354                                         drv_start_ap(local, sdata);
2355                         }
2356
2357                         /* fall through */
2358                 case NL80211_IFTYPE_MESH_POINT:
2359                         if (sdata->vif.bss_conf.enable_beacon) {
2360                                 changed |= BSS_CHANGED_BEACON |
2361                                            BSS_CHANGED_BEACON_ENABLED;
2362                                 ieee80211_bss_info_change_notify(sdata, changed);
2363                         }
2364                         break;
2365                 case NL80211_IFTYPE_NAN:
2366                         res = ieee80211_reconfig_nan(sdata);
2367                         if (res < 0) {
2368                                 ieee80211_handle_reconfig_failure(local);
2369                                 return res;
2370                         }
2371                         break;
2372                 case NL80211_IFTYPE_WDS:
2373                 case NL80211_IFTYPE_AP_VLAN:
2374                 case NL80211_IFTYPE_MONITOR:
2375                 case NL80211_IFTYPE_P2P_DEVICE:
2376                         /* nothing to do */
2377                         break;
2378                 case NL80211_IFTYPE_UNSPECIFIED:
2379                 case NUM_NL80211_IFTYPES:
2380                 case NL80211_IFTYPE_P2P_CLIENT:
2381                 case NL80211_IFTYPE_P2P_GO:
2382                         WARN_ON(1);
2383                         break;
2384                 }
2385         }
2386
2387         ieee80211_recalc_ps(local);
2388
2389         /*
2390          * The sta might be in psm against the ap (e.g. because
2391          * this was the state before a hw restart), so we
2392          * explicitly send a null packet in order to make sure
2393          * it'll sync against the ap (and get out of psm).
2394          */
2395         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2396                 list_for_each_entry(sdata, &local->interfaces, list) {
2397                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2398                                 continue;
2399                         if (!sdata->u.mgd.associated)
2400                                 continue;
2401
2402                         ieee80211_send_nullfunc(local, sdata, false);
2403                 }
2404         }
2405
2406         /* APs are now beaconing, add back stations */
2407         mutex_lock(&local->sta_mtx);
2408         list_for_each_entry(sta, &local->sta_list, list) {
2409                 enum ieee80211_sta_state state;
2410
2411                 if (!sta->uploaded)
2412                         continue;
2413
2414                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2415                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2416                         continue;
2417
2418                 for (state = IEEE80211_STA_NOTEXIST;
2419                      state < sta->sta_state; state++)
2420                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2421                                               state + 1));
2422         }
2423         mutex_unlock(&local->sta_mtx);
2424
2425         /* add back keys */
2426         list_for_each_entry(sdata, &local->interfaces, list)
2427                 ieee80211_reenable_keys(sdata);
2428
2429         /* Reconfigure sched scan if it was interrupted by FW restart */
2430         mutex_lock(&local->mtx);
2431         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2432                                                 lockdep_is_held(&local->mtx));
2433         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2434                                                 lockdep_is_held(&local->mtx));
2435         if (sched_scan_sdata && sched_scan_req)
2436                 /*
2437                  * Sched scan stopped, but we don't want to report it. Instead,
2438                  * we're trying to reschedule. However, if more than one scan
2439                  * plan was set, we cannot reschedule since we don't know which
2440                  * scan plan was currently running (and some scan plans may have
2441                  * already finished).
2442                  */
2443                 if (sched_scan_req->n_scan_plans > 1 ||
2444                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2445                                                          sched_scan_req)) {
2446                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2447                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2448                         sched_scan_stopped = true;
2449                 }
2450         mutex_unlock(&local->mtx);
2451
2452         if (sched_scan_stopped)
2453                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2454
2455  wake_up:
2456
2457         if (local->monitors == local->open_count && local->monitors > 0)
2458                 ieee80211_add_virtual_monitor(local);
2459
2460         /*
2461          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2462          * sessions can be established after a resume.
2463          *
2464          * Also tear down aggregation sessions since reconfiguring
2465          * them in a hardware restart scenario is not easily done
2466          * right now, and the hardware will have lost information
2467          * about the sessions, but we and the AP still think they
2468          * are active. This is really a workaround though.
2469          */
2470         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2471                 mutex_lock(&local->sta_mtx);
2472
2473                 list_for_each_entry(sta, &local->sta_list, list) {
2474                         if (!local->resuming)
2475                                 ieee80211_sta_tear_down_BA_sessions(
2476                                                 sta, AGG_STOP_LOCAL_REQUEST);
2477                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2478                 }
2479
2480                 mutex_unlock(&local->sta_mtx);
2481         }
2482
2483         if (local->in_reconfig) {
2484                 local->in_reconfig = false;
2485                 barrier();
2486
2487                 /* Restart deferred ROCs */
2488                 mutex_lock(&local->mtx);
2489                 ieee80211_start_next_roc(local);
2490                 mutex_unlock(&local->mtx);
2491
2492                 /* Requeue all works */
2493                 list_for_each_entry(sdata, &local->interfaces, list)
2494                         ieee80211_queue_work(&local->hw, &sdata->work);
2495         }
2496
2497         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2498                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2499                                         false);
2500
2501         /*
2502          * If this is for hw restart things are still running.
2503          * We may want to change that later, however.
2504          */
2505         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2506                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2507
2508         if (!suspended)
2509                 return 0;
2510
2511 #ifdef CONFIG_PM
2512         /* first set suspended false, then resuming */
2513         local->suspended = false;
2514         mb();
2515         local->resuming = false;
2516
2517         ieee80211_flush_completed_scan(local, false);
2518
2519         if (local->open_count && !reconfig_due_to_wowlan)
2520                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2521
2522         list_for_each_entry(sdata, &local->interfaces, list) {
2523                 if (!ieee80211_sdata_running(sdata))
2524                         continue;
2525                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2526                         ieee80211_sta_restart(sdata);
2527         }
2528
2529         mod_timer(&local->sta_cleanup, jiffies + 1);
2530 #else
2531         WARN_ON(1);
2532 #endif
2533
2534         return 0;
2535 }
2536
2537 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2538 {
2539         struct ieee80211_sub_if_data *sdata;
2540         struct ieee80211_local *local;
2541         struct ieee80211_key *key;
2542
2543         if (WARN_ON(!vif))
2544                 return;
2545
2546         sdata = vif_to_sdata(vif);
2547         local = sdata->local;
2548
2549         if (WARN_ON(!local->resuming))
2550                 return;
2551
2552         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2553                 return;
2554
2555         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2556
2557         mutex_lock(&local->key_mtx);
2558         list_for_each_entry(key, &sdata->key_list, list)
2559                 key->flags |= KEY_FLAG_TAINTED;
2560         mutex_unlock(&local->key_mtx);
2561 }
2562 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2563
2564 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2565 {
2566         struct ieee80211_local *local = sdata->local;
2567         struct ieee80211_chanctx_conf *chanctx_conf;
2568         struct ieee80211_chanctx *chanctx;
2569
2570         mutex_lock(&local->chanctx_mtx);
2571
2572         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2573                                         lockdep_is_held(&local->chanctx_mtx));
2574
2575         /*
2576          * This function can be called from a work, thus it may be possible
2577          * that the chanctx_conf is removed (due to a disconnection, for
2578          * example).
2579          * So nothing should be done in such case.
2580          */
2581         if (!chanctx_conf)
2582                 goto unlock;
2583
2584         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2585         ieee80211_recalc_smps_chanctx(local, chanctx);
2586  unlock:
2587         mutex_unlock(&local->chanctx_mtx);
2588 }
2589
2590 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2591 {
2592         struct ieee80211_local *local = sdata->local;
2593         struct ieee80211_chanctx_conf *chanctx_conf;
2594         struct ieee80211_chanctx *chanctx;
2595
2596         mutex_lock(&local->chanctx_mtx);
2597
2598         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2599                                         lockdep_is_held(&local->chanctx_mtx));
2600
2601         if (WARN_ON_ONCE(!chanctx_conf))
2602                 goto unlock;
2603
2604         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2605         ieee80211_recalc_chanctx_min_def(local, chanctx);
2606  unlock:
2607         mutex_unlock(&local->chanctx_mtx);
2608 }
2609
2610 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2611 {
2612         size_t pos = offset;
2613
2614         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2615                 pos += 2 + ies[pos + 1];
2616
2617         return pos;
2618 }
2619
2620 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2621                                             int rssi_min_thold,
2622                                             int rssi_max_thold)
2623 {
2624         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2625
2626         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2627                 return;
2628
2629         /*
2630          * Scale up threshold values before storing it, as the RSSI averaging
2631          * algorithm uses a scaled up value as well. Change this scaling
2632          * factor if the RSSI averaging algorithm changes.
2633          */
2634         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2635         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2636 }
2637
2638 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2639                                     int rssi_min_thold,
2640                                     int rssi_max_thold)
2641 {
2642         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2643
2644         WARN_ON(rssi_min_thold == rssi_max_thold ||
2645                 rssi_min_thold > rssi_max_thold);
2646
2647         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2648                                        rssi_max_thold);
2649 }
2650 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2651
2652 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2653 {
2654         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2655
2656         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2657 }
2658 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2659
2660 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2661                               u16 cap)
2662 {
2663         __le16 tmp;
2664
2665         *pos++ = WLAN_EID_HT_CAPABILITY;
2666         *pos++ = sizeof(struct ieee80211_ht_cap);
2667         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2668
2669         /* capability flags */
2670         tmp = cpu_to_le16(cap);
2671         memcpy(pos, &tmp, sizeof(u16));
2672         pos += sizeof(u16);
2673
2674         /* AMPDU parameters */
2675         *pos++ = ht_cap->ampdu_factor |
2676                  (ht_cap->ampdu_density <<
2677                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2678
2679         /* MCS set */
2680         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2681         pos += sizeof(ht_cap->mcs);
2682
2683         /* extended capabilities */
2684         pos += sizeof(__le16);
2685
2686         /* BF capabilities */
2687         pos += sizeof(__le32);
2688
2689         /* antenna selection */
2690         pos += sizeof(u8);
2691
2692         return pos;
2693 }
2694
2695 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2696                                u32 cap)
2697 {
2698         __le32 tmp;
2699
2700         *pos++ = WLAN_EID_VHT_CAPABILITY;
2701         *pos++ = sizeof(struct ieee80211_vht_cap);
2702         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2703
2704         /* capability flags */
2705         tmp = cpu_to_le32(cap);
2706         memcpy(pos, &tmp, sizeof(u32));
2707         pos += sizeof(u32);
2708
2709         /* VHT MCS set */
2710         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2711         pos += sizeof(vht_cap->vht_mcs);
2712
2713         return pos;
2714 }
2715
2716 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2717 {
2718         const struct ieee80211_sta_he_cap *he_cap;
2719         struct ieee80211_supported_band *sband;
2720         u8 n;
2721
2722         sband = ieee80211_get_sband(sdata);
2723         if (!sband)
2724                 return 0;
2725
2726         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2727         if (!he_cap)
2728                 return 0;
2729
2730         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2731         return 2 + 1 +
2732                sizeof(he_cap->he_cap_elem) + n +
2733                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2734                                      he_cap->he_cap_elem.phy_cap_info);
2735 }
2736
2737 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2738                               const struct ieee80211_sta_he_cap *he_cap,
2739                               u8 *end)
2740 {
2741         u8 n;
2742         u8 ie_len;
2743         u8 *orig_pos = pos;
2744
2745         /* Make sure we have place for the IE */
2746         /*
2747          * TODO: the 1 added is because this temporarily is under the EXTENSION
2748          * IE. Get rid of it when it moves.
2749          */
2750         if (!he_cap)
2751                 return orig_pos;
2752
2753         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2754         ie_len = 2 + 1 +
2755                  sizeof(he_cap->he_cap_elem) + n +
2756                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2757                                        he_cap->he_cap_elem.phy_cap_info);
2758
2759         if ((end - pos) < ie_len)
2760                 return orig_pos;
2761
2762         *pos++ = WLAN_EID_EXTENSION;
2763         pos++; /* We'll set the size later below */
2764         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2765
2766         /* Fixed data */
2767         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2768         pos += sizeof(he_cap->he_cap_elem);
2769
2770         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2771         pos += n;
2772
2773         /* Check if PPE Threshold should be present */
2774         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2775              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2776                 goto end;
2777
2778         /*
2779          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2780          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2781          */
2782         n = hweight8(he_cap->ppe_thres[0] &
2783                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2784         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2785                    IEEE80211_PPE_THRES_NSS_POS));
2786
2787         /*
2788          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2789          * total size.
2790          */
2791         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2792         n = DIV_ROUND_UP(n, 8);
2793
2794         /* Copy PPE Thresholds */
2795         memcpy(pos, &he_cap->ppe_thres, n);
2796         pos += n;
2797
2798 end:
2799         orig_pos[1] = (pos - orig_pos) - 2;
2800         return pos;
2801 }
2802
2803 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2804                                const struct cfg80211_chan_def *chandef,
2805                                u16 prot_mode, bool rifs_mode)
2806 {
2807         struct ieee80211_ht_operation *ht_oper;
2808         /* Build HT Information */
2809         *pos++ = WLAN_EID_HT_OPERATION;
2810         *pos++ = sizeof(struct ieee80211_ht_operation);
2811         ht_oper = (struct ieee80211_ht_operation *)pos;
2812         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2813                                         chandef->chan->center_freq);
2814         switch (chandef->width) {
2815         case NL80211_CHAN_WIDTH_160:
2816         case NL80211_CHAN_WIDTH_80P80:
2817         case NL80211_CHAN_WIDTH_80:
2818         case NL80211_CHAN_WIDTH_40:
2819                 if (chandef->center_freq1 > chandef->chan->center_freq)
2820                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2821                 else
2822                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2823                 break;
2824         default:
2825                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2826                 break;
2827         }
2828         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2829             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2830             chandef->width != NL80211_CHAN_WIDTH_20)
2831                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2832
2833         if (rifs_mode)
2834                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2835
2836         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2837         ht_oper->stbc_param = 0x0000;
2838
2839         /* It seems that Basic MCS set and Supported MCS set
2840            are identical for the first 10 bytes */
2841         memset(&ht_oper->basic_set, 0, 16);
2842         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2843
2844         return pos + sizeof(struct ieee80211_ht_operation);
2845 }
2846
2847 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2848                                    const struct cfg80211_chan_def *chandef)
2849 {
2850         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2851         *pos++ = 3;                                     /* IE length */
2852         /* New channel width */
2853         switch (chandef->width) {
2854         case NL80211_CHAN_WIDTH_80:
2855                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2856                 break;
2857         case NL80211_CHAN_WIDTH_160:
2858                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2859                 break;
2860         case NL80211_CHAN_WIDTH_80P80:
2861                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2862                 break;
2863         default:
2864                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2865         }
2866
2867         /* new center frequency segment 0 */
2868         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2869         /* new center frequency segment 1 */
2870         if (chandef->center_freq2)
2871                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2872         else
2873                 *pos++ = 0;
2874 }
2875
2876 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2877                                 const struct cfg80211_chan_def *chandef)
2878 {
2879         struct ieee80211_vht_operation *vht_oper;
2880
2881         *pos++ = WLAN_EID_VHT_OPERATION;
2882         *pos++ = sizeof(struct ieee80211_vht_operation);
2883         vht_oper = (struct ieee80211_vht_operation *)pos;
2884         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2885                                                         chandef->center_freq1);
2886         if (chandef->center_freq2)
2887                 vht_oper->center_freq_seg1_idx =
2888                         ieee80211_frequency_to_channel(chandef->center_freq2);
2889         else
2890                 vht_oper->center_freq_seg1_idx = 0x00;
2891
2892         switch (chandef->width) {
2893         case NL80211_CHAN_WIDTH_160:
2894                 /*
2895                  * Convert 160 MHz channel width to new style as interop
2896                  * workaround.
2897                  */
2898                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2899                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2900                 if (chandef->chan->center_freq < chandef->center_freq1)
2901                         vht_oper->center_freq_seg0_idx -= 8;
2902                 else
2903                         vht_oper->center_freq_seg0_idx += 8;
2904                 break;
2905         case NL80211_CHAN_WIDTH_80P80:
2906                 /*
2907                  * Convert 80+80 MHz channel width to new style as interop
2908                  * workaround.
2909                  */
2910                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2911                 break;
2912         case NL80211_CHAN_WIDTH_80:
2913                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2914                 break;
2915         default:
2916                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2917                 break;
2918         }
2919
2920         /* don't require special VHT peer rates */
2921         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2922
2923         return pos + sizeof(struct ieee80211_vht_operation);
2924 }
2925
2926 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2927 {
2928         struct ieee80211_he_operation *he_oper;
2929         u32 he_oper_params;
2930
2931         *pos++ = WLAN_EID_EXTENSION;
2932         *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2933         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2934
2935         he_oper_params = 0;
2936         he_oper_params |= u32_encode_bits(1023, /* disabled */
2937                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2938         he_oper_params |= u32_encode_bits(1,
2939                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2940         he_oper_params |= u32_encode_bits(1,
2941                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2942
2943         he_oper = (struct ieee80211_he_operation *)pos;
2944         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2945
2946         /* don't require special HE peer rates */
2947         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2948
2949         /* TODO add VHT operational and 6GHz operational subelement? */
2950
2951         return pos + sizeof(struct ieee80211_vht_operation);
2952 }
2953
2954 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2955                                struct cfg80211_chan_def *chandef)
2956 {
2957         enum nl80211_channel_type channel_type;
2958
2959         if (!ht_oper)
2960                 return false;
2961
2962         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2963         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2964                 channel_type = NL80211_CHAN_HT20;
2965                 break;
2966         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2967                 channel_type = NL80211_CHAN_HT40PLUS;
2968                 break;
2969         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2970                 channel_type = NL80211_CHAN_HT40MINUS;
2971                 break;
2972         default:
2973                 channel_type = NL80211_CHAN_NO_HT;
2974                 return false;
2975         }
2976
2977         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2978         return true;
2979 }
2980
2981 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2982                                 const struct ieee80211_vht_operation *oper,
2983                                 const struct ieee80211_ht_operation *htop,
2984                                 struct cfg80211_chan_def *chandef)
2985 {
2986         struct cfg80211_chan_def new = *chandef;
2987         int cf0, cf1;
2988         int ccfs0, ccfs1, ccfs2;
2989         int ccf0, ccf1;
2990
2991         if (!oper || !htop)
2992                 return false;
2993
2994         ccfs0 = oper->center_freq_seg0_idx;
2995         ccfs1 = oper->center_freq_seg1_idx;
2996         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2997                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2998                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2999
3000         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3001         ccf0 = ccfs0;
3002         ccf1 = ccfs1;
3003         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3004                 ccf1 = ccfs2;
3005
3006         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3007         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3008
3009         switch (oper->chan_width) {
3010         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3011                 /* just use HT information directly */
3012                 break;
3013         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3014                 new.width = NL80211_CHAN_WIDTH_80;
3015                 new.center_freq1 = cf0;
3016                 /* If needed, adjust based on the newer interop workaround. */
3017                 if (ccf1) {
3018                         unsigned int diff;
3019
3020                         diff = abs(ccf1 - ccf0);
3021                         if (diff == 8) {
3022                                 new.width = NL80211_CHAN_WIDTH_160;
3023                                 new.center_freq1 = cf1;
3024                         } else if (diff > 8) {
3025                                 new.width = NL80211_CHAN_WIDTH_80P80;
3026                                 new.center_freq2 = cf1;
3027                         }
3028                 }
3029                 break;
3030         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3031                 /* deprecated encoding */
3032                 new.width = NL80211_CHAN_WIDTH_160;
3033                 new.center_freq1 = cf0;
3034                 break;
3035         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3036                 /* deprecated encoding */
3037                 new.width = NL80211_CHAN_WIDTH_80P80;
3038                 new.center_freq1 = cf0;
3039                 new.center_freq2 = cf1;
3040                 break;
3041         default:
3042                 return false;
3043         }
3044
3045         if (!cfg80211_chandef_valid(&new))
3046                 return false;
3047
3048         *chandef = new;
3049         return true;
3050 }
3051
3052 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3053                              const struct ieee80211_supported_band *sband,
3054                              const u8 *srates, int srates_len, u32 *rates)
3055 {
3056         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3057         int shift = ieee80211_chandef_get_shift(chandef);
3058         struct ieee80211_rate *br;
3059         int brate, rate, i, j, count = 0;
3060
3061         *rates = 0;
3062
3063         for (i = 0; i < srates_len; i++) {
3064                 rate = srates[i] & 0x7f;
3065
3066                 for (j = 0; j < sband->n_bitrates; j++) {
3067                         br = &sband->bitrates[j];
3068                         if ((rate_flags & br->flags) != rate_flags)
3069                                 continue;
3070
3071                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3072                         if (brate == rate) {
3073                                 *rates |= BIT(j);
3074                                 count++;
3075                                 break;
3076                         }
3077                 }
3078         }
3079         return count;
3080 }
3081
3082 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3083                             struct sk_buff *skb, bool need_basic,
3084                             enum nl80211_band band)
3085 {
3086         struct ieee80211_local *local = sdata->local;
3087         struct ieee80211_supported_band *sband;
3088         int rate, shift;
3089         u8 i, rates, *pos;
3090         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3091         u32 rate_flags;
3092
3093         shift = ieee80211_vif_get_shift(&sdata->vif);
3094         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3095         sband = local->hw.wiphy->bands[band];
3096         rates = 0;
3097         for (i = 0; i < sband->n_bitrates; i++) {
3098                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3099                         continue;
3100                 rates++;
3101         }
3102         if (rates > 8)
3103                 rates = 8;
3104
3105         if (skb_tailroom(skb) < rates + 2)
3106                 return -ENOMEM;
3107
3108         pos = skb_put(skb, rates + 2);
3109         *pos++ = WLAN_EID_SUPP_RATES;
3110         *pos++ = rates;
3111         for (i = 0; i < rates; i++) {
3112                 u8 basic = 0;
3113                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3114                         continue;
3115
3116                 if (need_basic && basic_rates & BIT(i))
3117                         basic = 0x80;
3118                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3119                                     5 * (1 << shift));
3120                 *pos++ = basic | (u8) rate;
3121         }
3122
3123         return 0;
3124 }
3125
3126 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3127                                 struct sk_buff *skb, bool need_basic,
3128                                 enum nl80211_band band)
3129 {
3130         struct ieee80211_local *local = sdata->local;
3131         struct ieee80211_supported_band *sband;
3132         int rate, shift;
3133         u8 i, exrates, *pos;
3134         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3135         u32 rate_flags;
3136
3137         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3138         shift = ieee80211_vif_get_shift(&sdata->vif);
3139
3140         sband = local->hw.wiphy->bands[band];
3141         exrates = 0;
3142         for (i = 0; i < sband->n_bitrates; i++) {
3143                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3144                         continue;
3145                 exrates++;
3146         }
3147
3148         if (exrates > 8)
3149                 exrates -= 8;
3150         else
3151                 exrates = 0;
3152
3153         if (skb_tailroom(skb) < exrates + 2)
3154                 return -ENOMEM;
3155
3156         if (exrates) {
3157                 pos = skb_put(skb, exrates + 2);
3158                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3159                 *pos++ = exrates;
3160                 for (i = 8; i < sband->n_bitrates; i++) {
3161                         u8 basic = 0;
3162                         if ((rate_flags & sband->bitrates[i].flags)
3163                             != rate_flags)
3164                                 continue;
3165                         if (need_basic && basic_rates & BIT(i))
3166                                 basic = 0x80;
3167                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3168                                             5 * (1 << shift));
3169                         *pos++ = basic | (u8) rate;
3170                 }
3171         }
3172         return 0;
3173 }
3174
3175 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3176 {
3177         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3178         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3179
3180         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3181                 /* non-managed type inferfaces */
3182                 return 0;
3183         }
3184         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3185 }
3186 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3187
3188 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3189 {
3190         if (!mcs)
3191                 return 1;
3192
3193         /* TODO: consider rx_highest */
3194
3195         if (mcs->rx_mask[3])
3196                 return 4;
3197         if (mcs->rx_mask[2])
3198                 return 3;
3199         if (mcs->rx_mask[1])
3200                 return 2;
3201         return 1;
3202 }
3203
3204 /**
3205  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3206  * @local: mac80211 hw info struct
3207  * @status: RX status
3208  * @mpdu_len: total MPDU length (including FCS)
3209  * @mpdu_offset: offset into MPDU to calculate timestamp at
3210  *
3211  * This function calculates the RX timestamp at the given MPDU offset, taking
3212  * into account what the RX timestamp was. An offset of 0 will just normalize
3213  * the timestamp to TSF at beginning of MPDU reception.
3214  */
3215 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3216                                      struct ieee80211_rx_status *status,
3217                                      unsigned int mpdu_len,
3218                                      unsigned int mpdu_offset)
3219 {
3220         u64 ts = status->mactime;
3221         struct rate_info ri;
3222         u16 rate;
3223
3224         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3225                 return 0;
3226
3227         memset(&ri, 0, sizeof(ri));
3228
3229         ri.bw = status->bw;
3230
3231         /* Fill cfg80211 rate info */
3232         switch (status->encoding) {
3233         case RX_ENC_HT:
3234                 ri.mcs = status->rate_idx;
3235                 ri.flags |= RATE_INFO_FLAGS_MCS;
3236                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3237                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3238                 break;
3239         case RX_ENC_VHT:
3240                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3241                 ri.mcs = status->rate_idx;
3242                 ri.nss = status->nss;
3243                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3244                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3245                 break;
3246         default:
3247                 WARN_ON(1);
3248                 /* fall through */
3249         case RX_ENC_LEGACY: {
3250                 struct ieee80211_supported_band *sband;
3251                 int shift = 0;
3252                 int bitrate;
3253
3254                 switch (status->bw) {
3255                 case RATE_INFO_BW_10:
3256                         shift = 1;
3257                         break;
3258                 case RATE_INFO_BW_5:
3259                         shift = 2;
3260                         break;
3261                 }
3262
3263                 sband = local->hw.wiphy->bands[status->band];
3264                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3265                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3266
3267                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3268                         /* TODO: handle HT/VHT preambles */
3269                         if (status->band == NL80211_BAND_5GHZ) {
3270                                 ts += 20 << shift;
3271                                 mpdu_offset += 2;
3272                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3273                                 ts += 96;
3274                         } else {
3275                                 ts += 192;
3276                         }
3277                 }
3278                 break;
3279                 }
3280         }
3281
3282         rate = cfg80211_calculate_bitrate(&ri);
3283         if (WARN_ONCE(!rate,
3284                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3285                       (unsigned long long)status->flag, status->rate_idx,
3286                       status->nss))
3287                 return 0;
3288
3289         /* rewind from end of MPDU */
3290         if (status->flag & RX_FLAG_MACTIME_END)
3291                 ts -= mpdu_len * 8 * 10 / rate;
3292
3293         ts += mpdu_offset * 8 * 10 / rate;
3294
3295         return ts;
3296 }
3297
3298 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3299 {
3300         struct ieee80211_sub_if_data *sdata;
3301         struct cfg80211_chan_def chandef;
3302
3303         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3304         ASSERT_RTNL();
3305
3306         mutex_lock(&local->mtx);
3307         list_for_each_entry(sdata, &local->interfaces, list) {
3308                 /* it might be waiting for the local->mtx, but then
3309                  * by the time it gets it, sdata->wdev.cac_started
3310                  * will no longer be true
3311                  */
3312                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3313
3314                 if (sdata->wdev.cac_started) {
3315                         chandef = sdata->vif.bss_conf.chandef;
3316                         ieee80211_vif_release_channel(sdata);
3317                         cfg80211_cac_event(sdata->dev,
3318                                            &chandef,
3319                                            NL80211_RADAR_CAC_ABORTED,
3320                                            GFP_KERNEL);
3321                 }
3322         }
3323         mutex_unlock(&local->mtx);
3324 }
3325
3326 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3327 {
3328         struct ieee80211_local *local =
3329                 container_of(work, struct ieee80211_local, radar_detected_work);
3330         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3331         struct ieee80211_chanctx *ctx;
3332         int num_chanctx = 0;
3333
3334         mutex_lock(&local->chanctx_mtx);
3335         list_for_each_entry(ctx, &local->chanctx_list, list) {
3336                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3337                         continue;
3338
3339                 num_chanctx++;
3340                 chandef = ctx->conf.def;
3341         }
3342         mutex_unlock(&local->chanctx_mtx);
3343
3344         rtnl_lock();
3345         ieee80211_dfs_cac_cancel(local);
3346         rtnl_unlock();
3347
3348         if (num_chanctx > 1)
3349                 /* XXX: multi-channel is not supported yet */
3350                 WARN_ON(1);
3351         else
3352                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3353 }
3354
3355 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3356 {
3357         struct ieee80211_local *local = hw_to_local(hw);
3358
3359         trace_api_radar_detected(local);
3360
3361         schedule_work(&local->radar_detected_work);
3362 }
3363 EXPORT_SYMBOL(ieee80211_radar_detected);
3364
3365 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3366 {
3367         u32 ret;
3368         int tmp;
3369
3370         switch (c->width) {
3371         case NL80211_CHAN_WIDTH_20:
3372                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3373                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3374                 break;
3375         case NL80211_CHAN_WIDTH_40:
3376                 c->width = NL80211_CHAN_WIDTH_20;
3377                 c->center_freq1 = c->chan->center_freq;
3378                 ret = IEEE80211_STA_DISABLE_40MHZ |
3379                       IEEE80211_STA_DISABLE_VHT;
3380                 break;
3381         case NL80211_CHAN_WIDTH_80:
3382                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3383                 /* n_P40 */
3384                 tmp /= 2;
3385                 /* freq_P40 */
3386                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3387                 c->width = NL80211_CHAN_WIDTH_40;
3388                 ret = IEEE80211_STA_DISABLE_VHT;
3389                 break;
3390         case NL80211_CHAN_WIDTH_80P80:
3391                 c->center_freq2 = 0;
3392                 c->width = NL80211_CHAN_WIDTH_80;
3393                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3394                       IEEE80211_STA_DISABLE_160MHZ;
3395                 break;
3396         case NL80211_CHAN_WIDTH_160:
3397                 /* n_P20 */
3398                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3399                 /* n_P80 */
3400                 tmp /= 4;
3401                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3402                 c->width = NL80211_CHAN_WIDTH_80;
3403                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3404                       IEEE80211_STA_DISABLE_160MHZ;
3405                 break;
3406         default:
3407         case NL80211_CHAN_WIDTH_20_NOHT:
3408                 WARN_ON_ONCE(1);
3409                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3410                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3411                 break;
3412         case NL80211_CHAN_WIDTH_5:
3413         case NL80211_CHAN_WIDTH_10:
3414                 WARN_ON_ONCE(1);
3415                 /* keep c->width */
3416                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3417                 break;
3418         }
3419
3420         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3421
3422         return ret;
3423 }
3424
3425 /*
3426  * Returns true if smps_mode_new is strictly more restrictive than
3427  * smps_mode_old.
3428  */
3429 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3430                                    enum ieee80211_smps_mode smps_mode_new)
3431 {
3432         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3433                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3434                 return false;
3435
3436         switch (smps_mode_old) {
3437         case IEEE80211_SMPS_STATIC:
3438                 return false;
3439         case IEEE80211_SMPS_DYNAMIC:
3440                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3441         case IEEE80211_SMPS_OFF:
3442                 return smps_mode_new != IEEE80211_SMPS_OFF;
3443         default:
3444                 WARN_ON(1);
3445         }
3446
3447         return false;
3448 }
3449
3450 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3451                               struct cfg80211_csa_settings *csa_settings)
3452 {
3453         struct sk_buff *skb;
3454         struct ieee80211_mgmt *mgmt;
3455         struct ieee80211_local *local = sdata->local;
3456         int freq;
3457         int hdr_len = offsetofend(struct ieee80211_mgmt,
3458                                   u.action.u.chan_switch);
3459         u8 *pos;
3460
3461         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3462             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3463                 return -EOPNOTSUPP;
3464
3465         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3466                             5 + /* channel switch announcement element */
3467                             3 + /* secondary channel offset element */
3468                             5 + /* wide bandwidth channel switch announcement */
3469                             8); /* mesh channel switch parameters element */
3470         if (!skb)
3471                 return -ENOMEM;
3472
3473         skb_reserve(skb, local->tx_headroom);
3474         mgmt = skb_put_zero(skb, hdr_len);
3475         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3476                                           IEEE80211_STYPE_ACTION);
3477
3478         eth_broadcast_addr(mgmt->da);
3479         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3480         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3481                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3482         } else {
3483                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3484                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3485         }
3486         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3487         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3488         pos = skb_put(skb, 5);
3489         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3490         *pos++ = 3;                                             /* IE length */
3491         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3492         freq = csa_settings->chandef.chan->center_freq;
3493         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3494         *pos++ = csa_settings->count;                           /* count */
3495
3496         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3497                 enum nl80211_channel_type ch_type;
3498
3499                 skb_put(skb, 3);
3500                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3501                 *pos++ = 1;                                     /* IE length */
3502                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3503                 if (ch_type == NL80211_CHAN_HT40PLUS)
3504                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3505                 else
3506                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3507         }
3508
3509         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3510                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3511
3512                 skb_put(skb, 8);
3513                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3514                 *pos++ = 6;                                     /* IE length */
3515                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3516                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3517                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3518                 *pos++ |= csa_settings->block_tx ?
3519                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3520                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3521                 pos += 2;
3522                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3523                 pos += 2;
3524         }
3525
3526         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3527             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3528             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3529                 skb_put(skb, 5);
3530                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3531         }
3532
3533         ieee80211_tx_skb(sdata, skb);
3534         return 0;
3535 }
3536
3537 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3538 {
3539         return !(cs == NULL || cs->cipher == 0 ||
3540                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3541                  cs->hdr_len <= cs->key_idx_off ||
3542                  cs->key_idx_shift > 7 ||
3543                  cs->key_idx_mask == 0);
3544 }
3545
3546 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3547 {
3548         int i;
3549
3550         /* Ensure we have enough iftype bitmap space for all iftype values */
3551         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3552
3553         for (i = 0; i < n; i++)
3554                 if (!ieee80211_cs_valid(&cs[i]))
3555                         return false;
3556
3557         return true;
3558 }
3559
3560 const struct ieee80211_cipher_scheme *
3561 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3562                  enum nl80211_iftype iftype)
3563 {
3564         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3565         int n = local->hw.n_cipher_schemes;
3566         int i;
3567         const struct ieee80211_cipher_scheme *cs = NULL;
3568
3569         for (i = 0; i < n; i++) {
3570                 if (l[i].cipher == cipher) {
3571                         cs = &l[i];
3572                         break;
3573                 }
3574         }
3575
3576         if (!cs || !(cs->iftype & BIT(iftype)))
3577                 return NULL;
3578
3579         return cs;
3580 }
3581
3582 int ieee80211_cs_headroom(struct ieee80211_local *local,
3583                           struct cfg80211_crypto_settings *crypto,
3584                           enum nl80211_iftype iftype)
3585 {
3586         const struct ieee80211_cipher_scheme *cs;
3587         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3588         int i;
3589
3590         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3591                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3592                                       iftype);
3593
3594                 if (cs && headroom < cs->hdr_len)
3595                         headroom = cs->hdr_len;
3596         }
3597
3598         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3599         if (cs && headroom < cs->hdr_len)
3600                 headroom = cs->hdr_len;
3601
3602         return headroom;
3603 }
3604
3605 static bool
3606 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3607 {
3608         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3609         int skip;
3610
3611         if (end > 0)
3612                 return false;
3613
3614         /* One shot NOA  */
3615         if (data->count[i] == 1)
3616                 return false;
3617
3618         if (data->desc[i].interval == 0)
3619                 return false;
3620
3621         /* End time is in the past, check for repetitions */
3622         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3623         if (data->count[i] < 255) {
3624                 if (data->count[i] <= skip) {
3625                         data->count[i] = 0;
3626                         return false;
3627                 }
3628
3629                 data->count[i] -= skip;
3630         }
3631
3632         data->desc[i].start += skip * data->desc[i].interval;
3633
3634         return true;
3635 }
3636
3637 static bool
3638 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3639                              s32 *offset)
3640 {
3641         bool ret = false;
3642         int i;
3643
3644         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3645                 s32 cur;
3646
3647                 if (!data->count[i])
3648                         continue;
3649
3650                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3651                         ret = true;
3652
3653                 cur = data->desc[i].start - tsf;
3654                 if (cur > *offset)
3655                         continue;
3656
3657                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3658                 if (cur > *offset)
3659                         *offset = cur;
3660         }
3661
3662         return ret;
3663 }
3664
3665 static u32
3666 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3667 {
3668         s32 offset = 0;
3669         int tries = 0;
3670         /*
3671          * arbitrary limit, used to avoid infinite loops when combined NoA
3672          * descriptors cover the full time period.
3673          */
3674         int max_tries = 5;
3675
3676         ieee80211_extend_absent_time(data, tsf, &offset);
3677         do {
3678                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3679                         break;
3680
3681                 tries++;
3682         } while (tries < max_tries);
3683
3684         return offset;
3685 }
3686
3687 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3688 {
3689         u32 next_offset = BIT(31) - 1;
3690         int i;
3691
3692         data->absent = 0;
3693         data->has_next_tsf = false;
3694         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3695                 s32 start;
3696
3697                 if (!data->count[i])
3698                         continue;
3699
3700                 ieee80211_extend_noa_desc(data, tsf, i);
3701                 start = data->desc[i].start - tsf;
3702                 if (start <= 0)
3703                         data->absent |= BIT(i);
3704
3705                 if (next_offset > start)
3706                         next_offset = start;
3707
3708                 data->has_next_tsf = true;
3709         }
3710
3711         if (data->absent)
3712                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3713
3714         data->next_tsf = tsf + next_offset;
3715 }
3716 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3717
3718 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3719                             struct ieee80211_noa_data *data, u32 tsf)
3720 {
3721         int ret = 0;
3722         int i;
3723
3724         memset(data, 0, sizeof(*data));
3725
3726         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3727                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3728
3729                 if (!desc->count || !desc->duration)
3730                         continue;
3731
3732                 data->count[i] = desc->count;
3733                 data->desc[i].start = le32_to_cpu(desc->start_time);
3734                 data->desc[i].duration = le32_to_cpu(desc->duration);
3735                 data->desc[i].interval = le32_to_cpu(desc->interval);
3736
3737                 if (data->count[i] > 1 &&
3738                     data->desc[i].interval < data->desc[i].duration)
3739                         continue;
3740
3741                 ieee80211_extend_noa_desc(data, tsf, i);
3742                 ret++;
3743         }
3744
3745         if (ret)
3746                 ieee80211_update_p2p_noa(data, tsf);
3747
3748         return ret;
3749 }
3750 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3751
3752 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3753                            struct ieee80211_sub_if_data *sdata)
3754 {
3755         u64 tsf = drv_get_tsf(local, sdata);
3756         u64 dtim_count = 0;
3757         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3758         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3759         struct ps_data *ps;
3760         u8 bcns_from_dtim;
3761
3762         if (tsf == -1ULL || !beacon_int || !dtim_period)
3763                 return;
3764
3765         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3766             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3767                 if (!sdata->bss)
3768                         return;
3769
3770                 ps = &sdata->bss->ps;
3771         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3772                 ps = &sdata->u.mesh.ps;
3773         } else {
3774                 return;
3775         }
3776
3777         /*
3778          * actually finds last dtim_count, mac80211 will update in
3779          * __beacon_add_tim().
3780          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3781          */
3782         do_div(tsf, beacon_int);
3783         bcns_from_dtim = do_div(tsf, dtim_period);
3784         /* just had a DTIM */
3785         if (!bcns_from_dtim)
3786                 dtim_count = 0;
3787         else
3788                 dtim_count = dtim_period - bcns_from_dtim;
3789
3790         ps->dtim_count = dtim_count;
3791 }
3792
3793 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3794                                          struct ieee80211_chanctx *ctx)
3795 {
3796         struct ieee80211_sub_if_data *sdata;
3797         u8 radar_detect = 0;
3798
3799         lockdep_assert_held(&local->chanctx_mtx);
3800
3801         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3802                 return 0;
3803
3804         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3805                 if (sdata->reserved_radar_required)
3806                         radar_detect |= BIT(sdata->reserved_chandef.width);
3807
3808         /*
3809          * An in-place reservation context should not have any assigned vifs
3810          * until it replaces the other context.
3811          */
3812         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3813                 !list_empty(&ctx->assigned_vifs));
3814
3815         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3816                 if (sdata->radar_required)
3817                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3818
3819         return radar_detect;
3820 }
3821
3822 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3823                                  const struct cfg80211_chan_def *chandef,
3824                                  enum ieee80211_chanctx_mode chanmode,
3825                                  u8 radar_detect)
3826 {
3827         struct ieee80211_local *local = sdata->local;
3828         struct ieee80211_sub_if_data *sdata_iter;
3829         enum nl80211_iftype iftype = sdata->wdev.iftype;
3830         struct ieee80211_chanctx *ctx;
3831         int total = 1;
3832         struct iface_combination_params params = {
3833                 .radar_detect = radar_detect,
3834         };
3835
3836         lockdep_assert_held(&local->chanctx_mtx);
3837
3838         if (WARN_ON(hweight32(radar_detect) > 1))
3839                 return -EINVAL;
3840
3841         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3842                     !chandef->chan))
3843                 return -EINVAL;
3844
3845         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3846                 return -EINVAL;
3847
3848         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3849             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3850                 /*
3851                  * always passing this is harmless, since it'll be the
3852                  * same value that cfg80211 finds if it finds the same
3853                  * interface ... and that's always allowed
3854                  */
3855                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3856         }
3857
3858         /* Always allow software iftypes */
3859         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3860                 if (radar_detect)
3861                         return -EINVAL;
3862                 return 0;
3863         }
3864
3865         if (chandef)
3866                 params.num_different_channels = 1;
3867
3868         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3869                 params.iftype_num[iftype] = 1;
3870
3871         list_for_each_entry(ctx, &local->chanctx_list, list) {
3872                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3873                         continue;
3874                 params.radar_detect |=
3875                         ieee80211_chanctx_radar_detect(local, ctx);
3876                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3877                         params.num_different_channels++;
3878                         continue;
3879                 }
3880                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3881                     cfg80211_chandef_compatible(chandef,
3882                                                 &ctx->conf.def))
3883                         continue;
3884                 params.num_different_channels++;
3885         }
3886
3887         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3888                 struct wireless_dev *wdev_iter;
3889
3890                 wdev_iter = &sdata_iter->wdev;
3891
3892                 if (sdata_iter == sdata ||
3893                     !ieee80211_sdata_running(sdata_iter) ||
3894                     cfg80211_iftype_allowed(local->hw.wiphy,
3895                                             wdev_iter->iftype, 0, 1))
3896                         continue;
3897
3898                 params.iftype_num[wdev_iter->iftype]++;
3899                 total++;
3900         }
3901
3902         if (total == 1 && !params.radar_detect)
3903                 return 0;
3904
3905         return cfg80211_check_combinations(local->hw.wiphy, &params);
3906 }
3907
3908 static void
3909 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3910                          void *data)
3911 {
3912         u32 *max_num_different_channels = data;
3913
3914         *max_num_different_channels = max(*max_num_different_channels,
3915                                           c->num_different_channels);
3916 }
3917
3918 int ieee80211_max_num_channels(struct ieee80211_local *local)
3919 {
3920         struct ieee80211_sub_if_data *sdata;
3921         struct ieee80211_chanctx *ctx;
3922         u32 max_num_different_channels = 1;
3923         int err;
3924         struct iface_combination_params params = {0};
3925
3926         lockdep_assert_held(&local->chanctx_mtx);
3927
3928         list_for_each_entry(ctx, &local->chanctx_list, list) {
3929                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3930                         continue;
3931
3932                 params.num_different_channels++;
3933
3934                 params.radar_detect |=
3935                         ieee80211_chanctx_radar_detect(local, ctx);
3936         }
3937
3938         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3939                 params.iftype_num[sdata->wdev.iftype]++;
3940
3941         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3942                                          ieee80211_iter_max_chans,
3943                                          &max_num_different_channels);
3944         if (err < 0)
3945                 return err;
3946
3947         return max_num_different_channels;
3948 }
3949
3950 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3951 {
3952         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3953         *buf++ = 7; /* len */
3954         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3955         *buf++ = 0x50;
3956         *buf++ = 0xf2;
3957         *buf++ = 2; /* WME */
3958         *buf++ = 0; /* WME info */
3959         *buf++ = 1; /* WME ver */
3960         *buf++ = qosinfo; /* U-APSD no in use */
3961
3962         return buf;
3963 }
3964
3965 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3966                              unsigned long *frame_cnt,
3967                              unsigned long *byte_cnt)
3968 {
3969         struct txq_info *txqi = to_txq_info(txq);
3970         u32 frag_cnt = 0, frag_bytes = 0;
3971         struct sk_buff *skb;
3972
3973         skb_queue_walk(&txqi->frags, skb) {
3974                 frag_cnt++;
3975                 frag_bytes += skb->len;
3976         }
3977
3978         if (frame_cnt)
3979                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3980
3981         if (byte_cnt)
3982                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3983 }
3984 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3985
3986 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3987         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3988         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3989         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3990         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3991 };